Wet, semi-dry and dry desulfurization processes.

The most common desulfurization methods are calcium desulfurization and ammonia desulfurization. The market of calcium injection in furnace, plasma desulfurization and seawater desulfurization is very small, which is only suitable for special circumstances. Wet desulfurization technology is mature, with high efficiency and simple operation.

The traditional limestone/lime-gypsum flue gas desulfurization process uses calcium-based desulfurizer to absorb sulfur dioxide and generate calcium sulfite and calcium sulfate. Because of their low solubility, it is easy to form scaling and blockage in desulfurization tower and pipeline. Double-alkali flue gas desulfurization technology is developed to overcome the shortcoming of easy scaling of limestone-lime method.

With the gradual implementation of the new environmental protection law, the requirements for desulfurization efficiency are getting higher and higher. The only desulfurization methods that can meet desulfurization efficiency are calcium method and ammonia method. However, the calcium method has some problems, such as complex process, blockage, corrosion and sulfur gypsum accumulation, but it is still the mainstream desulfurization method at present. The ammonia desulfurization process is simple and will not produce any waste. The produced ammonium sulfate can be used as compound fertilizer, but there are still problems of large investment and high operating cost. Ammonia desulfurization is the least problematic desulfurization method at present and the mainstream trend in the future. The new integrated desulfurization and denitrification technology is gradually improved, which can meet the ultra-low emission standards of the new environmental protection law.

2. Flue gas desulfurization method

At least 0.27 yuan to open a library member, see the full content > original publisher: FX database Yan 1. Policy background of flue gas desulfurization in China during the Twelfth Five-Year Plan period. Sulfur dioxide emission reduction is one of the important tasks of China's major pollutants emission reduction during the Twelfth Five-Year Plan period.

20 1 1 in March, 2008, the Twelfth Five-Year Plan issued by the State Council took sulfur dioxide as the binding index for total emission reduction control of major pollutants, so as to achieve the goal of 8% emission reduction. 20 1 1 February, the 12th Five-Year Plan of national environmental protection was announced. In order to achieve the goal of reducing emissions by 8%, sulfur dioxide emissions will be further reduced from 22.678 million tons in 20 10 to 20.864 million tons in 20 15.

At the same time, the coal consumption in China is expected to increase from 3 billion tons in 20 10 to about 3.8 billion tons in 20 15. Therefore, the task of reducing sulfur dioxide emissions is very arduous.

2011165438 10. In October, the State Council issued "the State Council's Opinions on Strengthening the Key Work of Environmental Protection" (Guo Fa [201/kloc-0] No.35), proposing the total control of sulfur dioxide emissions in the power industry. Control the total emission of sulfur dioxide in the steel industry and strengthen the control of sulfur dioxide and nitrogen oxides in the cement, petrochemical and coal chemical industries. Thermal power plant is the main source of sulfur dioxide emission in China, and it is also the main battlefield of sulfur dioxide emission reduction in China.

The revised Emission Standard of Air Pollutants for Thermal Power Plants (GB13223-20 1 1) was promulgated in September, 201,and has been implemented since 20 12. Among them, the sulfur dioxide emission limit of newly-built coal-fired power plants is 100mg/m3 (200 mg/m3 in high-sulfur coal areas); 200mg/Nm3 (high-sulfur coal area 400) shall be implemented for the renovation of existing power plants; Coal-fired power plants in key areas carry out 50mg/Nm3 sulfur separation from coal. The organic amine method of the Ministry of Environmental Protection is developed on the process of removing hydrogen sulfide in the chemical industry, and it can also reach (.

3. The method of desulfurization

Flue gas desulfurization refers to the removal of sulfur oxides (SO2 and SO3) from flue gas or other industrial waste gas.

Directory 1 Process Introduction 2 Basic Principles 3 Process Methods? Brief introduction to the method? Dry desulfurization? Spray desulfurization? Desulfurization of coal ash? Wet FGD 4 process history 5 anticorrosion protection of desulfurization 1 process introduction editor Flue gas desulfurization (FGD for short), [1] In FGD technology, according to the types of desulfurizers, there are five methods: calcium method based on CaCO3 (limestone), magnesium method based on MgO, and sodium method based on Na2SO3 and NH3. [1] 2 basic principles Edit chemical principles: SO2 in flue gas is acidic in nature, [2] SO2 can be removed from flue gas by reacting with appropriate alkaline substances.

The most commonly used alkaline substances for flue gas desulfurization are limestone (calcium carbonate), quicklime (calcium oxide, Cao) and hydrated lime (calcium hydroxide). Limestone is abundant, so it is relatively cheap. Both quicklime and hydrated lime are made by heating limestone.

Other alkaline substances such as sodium carbonate (soda ash), magnesium carbonate and ammonia are sometimes used. The alkaline substances used react with SO2 in flue gas to produce a mixture of sulfite and sulfate (these salts can be calcium, sodium, magnesium or ammonium salts, depending on the alkaline substances used).

The ratio between sulfite and sulfate depends on the process conditions. In some processes, all sulfite is converted into sulfate. The reaction between SO2 and alkaline substances occurs either in alkaline solution (wet flue gas desulfurization technology) or on the wet surface of solid alkaline substances (dry or semi-dry flue gas desulfurization technology).

In wet flue gas desulfurization system, alkaline substances (usually alkaline solution, more commonly alkaline slurry) meet with flue gas in spray tower. SO2 in flue gas is dissolved in water to form dilute acid solution, and then neutralized with alkaline substances dissolved in water.

Sulfite and sulfate produced by the reaction are precipitated from the aqueous solution, which depends on the relative solubility of different salts in the solution. For example, the solubility of calcium sulfate is poor, so it is easy to precipitate.

The solubility of sodium sulfate and ammonium sulfate is much better. SO2 In dry and semi-dry flue gas desulfurization systems, solid alkaline absorbent or flue gas is injected into flue gas stream through alkaline absorbent bed to make it contact with flue gas.

In either case, SO2 directly reacts with solid alkaline substances to generate corresponding sulfite and sulfate. In order for this reaction to proceed, the solid alkaline substance must be very loose or very fine.

In the semi-dry flue gas desulfurization system, water is added to the flue gas to form a liquid film on the surface of alkaline particles, and SO2 is dissolved in the liquid film, which accelerates the reaction with solid alkaline substances. 3 Introduction of editing method of process method The commercial technology widely used in the world is calcium method, accounting for more than 90%.

According to the wet and dry state of absorbent and desulfurization products during desulfurization, desulfurization technology can be divided into wet method, dry method and semi-dry (semi-wet) method. Wet flue gas desulfurization technology is to use absorbent solution or slurry to desulfurize and treat desulfurization products in wet state. This method has the advantages of fast desulfurization reaction, simple equipment and high desulfurization efficiency, but there are many problems such as serious corrosion, high operation and maintenance cost and easy to cause secondary pollution.

Desulfurization absorption and product treatment of dry flue gas desulfurization technology are carried out in dry state. This method has the advantages of no waste water, no acid discharge, little equipment corrosion, no obvious temperature drop of flue gas during purification, high temperature of flue gas after purification, good exhaust diffusion of chimney and less secondary pollution, but there are some problems such as low desulfurization efficiency, slow reaction speed and huge equipment. Semi-dry flue gas desulfurization technology refers to flue gas desulfurization technology in which desulfurizer is desulfurized in dry state, regenerated in wet state (such as water-washed activated carbon regeneration process), or desulfurized in wet state, and desulfurized products are treated in dry state (such as spray drying method).

Especially, the semi-dry method of wet desulfurization and dry treatment of desulfurization products has the advantages of fast wet desulfurization reaction and high desulfurization efficiency, and the advantages of dry method that there is no waste acid discharge from sewage and desulfurization products are easy to treat, which has attracted wide attention. According to the use of desulfurization products, it can be divided into two methods: discard method and recovery method.

At present, the commonly used flue gas desulfurization methods at home and abroad can be roughly divided into three categories according to their processes: wet disposal process, wet recovery process and dry process. Among them, the application of frequency converter in equipment has made great contribution to energy saving.

[3] Dry Desulfurization Dry flue gas desulfurization process This process was used for flue gas desulfurization in power plants in the early 1980s. Compared with the conventional wet scrubbing process, it has the following advantages: lower investment cost; Desulfurization products are dried and mixed with fly ash; No need to install demister and reheater; Equipment is not easy to corrode, scale and block. Its disadvantages are: the utilization rate of absorbent is lower than that of wet flue gas desulfurization process; When used in high sulfur coal, the economy is poor; The mixture of fly ash and desulfurization products may affect the comprehensive utilization; The control requirements of drying process are very high.

Spray Desulfurization Spray Dry Flue Gas Desulfurization Process Spray Dry Flue Gas Desulfurization (hereinafter referred to as dry FGD) was first developed by JOY Company of the United States and NiroAtomier Company of Denmark, developed in the mid-1970s, and quickly popularized and applied in the power industry. In this process, the atomized lime slurry contacts the flue gas in the spray drying tower, and the lime slurry reacts with SO2 to generate a dry solid reactant, which is finally collected by the dust collector together with the fly ash.

The pilot test of rotary spray dry flue gas desulfurization was carried out in Sichuan Baima Power Plant, and some experiences were obtained, which provided a basis for the design of the optimal parameters of rotary spray dry flue gas desulfurization for 200～300 MW units. Fly Ash Desulfurization Fly Ash Dry Flue Gas Desulfurization Technology In Japan, dry flue gas desulfurization technology with fly ash as desulfurizer was studied from 1985. By the end of 1988, the actual industrial test was completed. 19 1 At the beginning of the year, the first dry flue gas desulfurization equipment with fly ash was put into operation, with a flue gas treatment capacity of 644,000 nm3/h.

Its characteristics: the desulfurization rate is as high as 60% or more, and its performance is stable, reaching the level of general wet desulfurization performance; The desulfurizer has low cost; Less water consumption, no need for drainage treatment and flue gas reheating, and the total equipment cost is lower than that of wet desulfurization1/4; The fly ash desulfurizer can be reused; No slurry, convenient maintenance, equipment system.

4. What are the main types of commonly used coal-fired flue gas desulfurization methods?

Flue gas desulfurization (FGD) is an effective desulfurization method widely used in industry.

According to the forms of sulfide absorbent and by-products, desulfurization technology can be divided into three types: dry method, semi-dry method and wet method. Dry desulfurization process mainly uses solid absorbent to remove SO2 from flue gas. Generally, limestone fine powder is sprayed into the furnace and decomposed into CaO by heating, so as to absorb SO2 in flue gas and generate CaSO3 _ 3, which is collected together with fly ash in a dust collector or discharged through a chimney.

Wet flue gas desulfurization is a gas-liquid reaction of liquid absorbent under ionic conditions, and then SO2 in flue gas is removed. The equipment used in the system is simple, stable and reliable, and the desulfurization efficiency is high. The biggest advantage of dry desulfurization is that there is no discharge of wastewater and waste acid during treatment, which reduces secondary pollution; Disadvantages are low desulfurization efficiency and huge equipment.

Wet desulfurization uses liquid absorbent to wash flue gas to remove SO2. The equipment used is relatively simple, easy to operate and has high desulfurization efficiency. However, the temperature of flue gas after desulfurization is lower, and the corrosion of equipment is more serious than that of dry method. [1] Limestone (lime)-gypsum wet flue gas desulfurization process Limestone (lime) wet desulfurization technology has been widely used in the field of wet FGD because of its cheap and easy-to-get absorbent.

The reaction mechanism with limestone as absorbent is as follows: absorption: SO2 (g) → SO2 (l)+H2O → H++HSO 3-→ H++SO32-dissolution: CaCO3(s)+H+ → Ca2++HCO3- neutralization: HCO3- +H+ →CO2(g)+H2O oxidation: HSO. 2o2 → SO32-+h+SO32-+1/2o2 → so42-crystallization: Ca2++so42-+1/2h2o → caso4.1/2h2o (s) This process has high desulfurization efficiency (>: 95%).

Seawater flue gas desulfurization process is a desulfurization method that uses the alkalinity of seawater to remove sulfur dioxide from flue gas. The desulfurization process does not need to add any chemicals and does not produce solid waste, so the desulfurization efficiency is >: 92% and the operation and maintenance costs are low.

After the flue gas is removed by the dust collector, it is sent to the gas-gas heat exchanger for cooling by the booster fan, and then sent to the absorption tower. In the desulfurization absorption tower, it contacts with a large amount of seawater from the circulating cooling system, so that the sulfur dioxide in the flue gas is removed through absorption reaction, and the seawater is discharged after oxidation.

The flue gas after sulfur dioxide removal is heated by a heat exchanger and then discharged from the flue. Due to geographical restrictions, the seawater flue gas desulfurization process is only suitable for projects with rich seawater resources, especially for thermal power plants with seawater as circulating cooling water. However, it is necessary to properly solve the anti-corrosion problems of absorption tower, absorption tower drainage ditch and its rear flue, chimney, aeration tank and aeration device.

The process flow is shown in figure 1. Spray drying process Spray drying process (SDA) is a semi-dry flue gas desulfurization technology, and its market share is second only to wet method.

In this method, the absorbent slurry Ca(OH)2 is sprayed into the reaction tower, and the droplets are evaporated by the hot flue gas, and at the same time, SO2 in the flue gas is absorbed, resulting in solids that are captured by the dust collector. When the ratio of calcium to sulfur is 1.3~ 1.6, the desulfurization efficiency can reach 80%~90%.

Semi-dry flue gas desulfurization technology has the general characteristics of dry and wet methods. Its main disadvantages are that lime milk is used as absorbent, the system is easy to scale and block, special equipment is needed to prepare absorbent, and the investment cost is too high; The desulfurization efficiency and absorbent utilization rate are not as high as limestone/gypsum method.

Spray drying technology is widely used in small and medium-sized units burning low-sulfur and medium-sulfur coal. In China1June 1990, a set of medium-sized test equipment was built in Baima Power Plant.

Later, many units also adopted this desulfurization process, and the technology has basically matured. Electron beam flue gas desulfurization process (EBA process) Electron beam radiation desulfurization process is a dry desulfurization technology, which is a combination of physical and chemical methods.

The process flow consists of flue gas pre-dust removal, flue gas cooling, ammonia washing, electron beam irradiation and by-product capture. The flue gas discharged from the boiler enters the cooling tower after coarse filtration by the dust collector, and cooling water is sprayed in the cooling tower to cool the flue gas to a temperature suitable for desulfurization and denitrification (about 70℃).

The dew point of flue gas is usually around 50℃. Flue gas passing through the cooling tower flows into the reactor, and ammonia, compressed air and soft water with stoichiometric ratio are injected. The amount of ammonia added depends on the concentration of SOx and nitrogen oxides. After electron beam irradiation, SOx and nitrogen oxides generate intermediates sulfuric acid and nitric acid under the action of free radicals.

Then sulfuric acid and nitric acid react with ammonia stored in * * * to produce a mixture of powdery granular ammonium sulfate and ammonium nitrate. The desulfurization rate can reach above 90%, and the denitrification rate can reach above 80%.

In addition, sodium, magnesium and ammonia can also be used as absorbents. The mixed particles of ammonium sulfate and ammonium nitrate produced by the total reaction are separated and collected by the by-product dust collector, and the purified flue gas is pressurized and discharged into the atmosphere.

5. What are the flue gas desulfurization methods?

The main technologies of industrialization are: ① Wet lime/limestone-gypsum method, which uses the slurry of lime or limestone to absorb SO2 in flue gas to generate calcium sulfite hemihydrate or reoxidize it into gypsum.

Its technology is mature and its desulfurization efficiency is stable, reaching more than 90%, which is the main method at home and abroad. (2) Spray drying method In this method, lime milk is used as absorbent and sprayed into the desulfurization tower. After desulfurization and drying, it is discharged as powdered desulfurization slag, which belongs to semi-dry desulfurization. The desulfurization efficiency is about 85%, which is lower than that of wet limestone-gypsum method.

Currently, it is mainly used in the United States. ③ The absorption and regeneration methods mainly include ammonia method, magnesium oxide method, double alkali method and W-L method.

The desulfurization efficiency can reach about 95%, and the technology is mature. (4) Calcium injection in the furnace-humidification activation desulfurization method This method is a desulfurization technology in which powdered calcium desulfurizer (limestone) is directly injected into the furnace of the combustion boiler, which is suitable for medium and low sulfur coal-fired boilers, and the desulfurization efficiency is about 85%.

6. Principle and process flow of wet desulfurization technology.

The technical principle and process of wet desulfurization process: the flue gas enters the wet absorption tower of desulfurization device and contacts with the alkaline limestone slurry droplets sprayed from top to bottom, in which acid oxide SO2, HCL, HF and other pollutants are absorbed, and the flue gas is fully purified; CaSO _ 3 is generated by the reaction of the slurry after absorbing SO2, and CaSO _ 4 is generated by in-situ forced oxidation crystallization. 2H2O, and after dehydration, gypsum, a by-product of commercial desulfurization, was obtained, and finally the comprehensive treatment of sulfur-containing flue gas was realized.

Extended data:

Technical advantages: 1 integrates the process design of smoke elimination, desulfurization, denitrification, dust removal and dehydration, with simple and compact structure, reasonable process flow, no easy scaling and blockage inside, and no water in flue gas design; 2. The utilization rate of the effective area inside the equipment reaches 1 0,000%, and the smoke and dust are completely dissolved in the alkaline aqueous solution during the whole purification process, thus achieving the effect of efficient mass transfer; 3. The application of efficient spray atomization design, no wearing parts in the equipment, to ensure the most efficient desulfurization and dust removal; 4. Establish the most adequate mass transfer process between flue gas and alkaline solution to ensure the most effective desulfurization and dust removal; Natural wear-resistant granite can be used as the manufacturing material, which solves the shortcomings of long-term wear resistance, corrosion resistance and short service life of environmental protection equipment; Ensure a certain liquid gasification, the absorption rate of sulfur dioxide is stable, and the ph value is controlled at around 10. Sulfur dioxide absorbent adopts 25% dilute lye. It is not volatile, has low loss, high desulfurization efficiency and stable effect, and also effectively solves the problems of equipment dust accumulation and scaling; 7. Smooth flue gas channel design inside the equipment, with no dead angle in the flue gas direction, can reduce the thermal resistance of flue gas, ensure the effect under the design working condition, and do not affect the operation of combustion equipment such as boilers; The principle of circulating double alkali desulfurization is simple and efficient, which makes full use of the waste alkali liquor produced by the factory, treats waste with waste, comprehensively utilizes it, reduces the operation cost, and the alkali water is recycled in a closed circuit, so that the utilization rate of wastewater reaches 100%, and realizes the discharge of wastewater without secondary pollution.

Baidu encyclopedia-desulfurization technology.

7. Type of desulfurization process

Limestone-gypsum desulfurization process is the most widely used desulfurization technology in the world, and about 90% of flue gas desulfurization devices used in thermal power plants in Japan, Germany and the United States adopt this process.

Its working principle is that limestone powder is added with water to make slurry, which is pumped into the absorption tower as an absorbent to fully contact and mix with flue gas. Sulfur dioxide in flue gas reacts with calcium carbonate in slurry and air blown from the lower part of the tower to generate calcium sulfate. When the calcium sulfate reaches a certain saturation, it crystallizes to form gypsum dihydrate. The gypsum slurry discharged from the absorption tower is concentrated and dehydrated to make its water content less than 10%, and then sent to the gypsum storage bin for stacking by the conveyor. The desulfurized flue gas passes through a demister to remove fog droplets, then is heated by a heat exchanger, and then is discharged into the atmosphere through a chimney.

Because the absorbent slurry in the absorption tower repeatedly contacts the flue gas through the circulating pump, the utilization rate of absorbent is high, calcium and sulfur are low, and the desulfurization efficiency can be greater than 95%. System composition: (1) limestone storage and transportation system (2) limestone slurry preparation and supply system (3) flue gas system (4)SO2 absorption system (5) gypsum dehydration system (6) gypsum storage and transportation system (7) slurry discharge system (8) process water system (9) compressed air system (10) wastewater treatment system. Technical features: (1) wide application range of absorbent: FGD unit can use various absorbents, including limestone, lime, magnesite, waste lye, etc. ⑵. Wide application range of fuel: suitable for tail gas treatment of coal-fired, heavy oil, orimulsion and petroleum coke boilers; (3) Strong adaptability to the change range of fuel sulfur content: flue gas with fuel sulfur content as high as 8% can be treated; (4) Strong adaptability to load change of the unit: it can ensure the stable operation of the unit within the range of 15~ 100% load change; 5. High desulfurization efficiency: generally greater than 95%, up to 98%; [6], patented tray technology: effectively reduce the liquid/gas ratio, which is beneficial to uniform air distribution in the tower, save materials and energy consumption, and facilitate the maintenance of the internals of the absorption tower; (7) High utilization rate of absorbent: the ratio of calcium to sulfur is as low as1.02 ~1.03; (8) High purity of by-products: commercial gypsum with a purity of over 95% can be produced; (9) High dust removal efficiency of coal-fired boilers: 80% ~ 90%; ⑽. Cross spray pipe layout technology: it is beneficial to reduce the height of absorption tower.

Recommended scope of application: (200MW and above large and medium-sized newly built or renovated units; (2) The sulfur content of coal is 0.5~5% or above; (3) The desulfurization efficiency should be above 95%; (4) In the spray drying desulfurization process in areas where limestone is abundant and gypsum is widely used, lime is used as desulfurization absorbent, and lime-cooked lime milk is made by digesting lime and adding water, which is pumped into the atomization device located in the absorption tower. In the absorption tower, the absorbent atomized into fine droplets is mixed and contacted with flue gas, and reacts chemically with SO2 in flue gas to generate CaSO3 _ 3, and SO2 in flue gas is removed. At the same time, the moisture brought by the absorbent quickly evaporates and dries, and the flue gas temperature decreases.

Desulfurization reaction products and unused absorbent are taken out of the absorption tower with flue gas in the form of dry particles, and then enter the dust collector for collection. The flue gas after desulfurization is discharged after dust removal by a dust collector.

In order to improve the utilization rate of desulfurization absorbent, some dust collectors are generally added to the pulping system for collection and recycling. There are two different atomization forms to choose from in this process, one is rotary spray wheel atomization, and the other is gas-liquid two-phase flow.

Spray drying desulfurization process has the characteristics of mature technology, simple process flow and high system reliability, and the desulfurization rate can reach above 85%. This technology has a certain application range (8%) in the United States and some countries in Western Europe.

Desulfurization slag can be used for brick making and road construction, but it is mostly abandoned in ash yard or backfilled with waste ore. The flue gas desulfurization technology of ammonium phosphate fertilizer belongs to recovery method, which is named after its by-product ammonium phosphate.

The process is mainly composed of adsorption (desulfurization of activated carbon to produce acid), extraction (decomposition of phosphate rock with dilute sulfuric acid to extract phosphoric acid), neutralization (preparation of ammonium phosphate neutralization solution), absorption (desulfurization of ammonium phosphate solution to produce fertilizer), oxidation (oxidation of ammonium sulfite), concentration and drying (preparation of solid fertilizer) and other units. It is divided into two systems: flue gas desulfurization system-flue gas passes through a high-efficiency dust collector to make the dust content less than 200mg/Nm3, and the pressure of flue gas is increased from a fan to 7000Pa. The flue gas is cooled and humidified by spraying water through the Venturi tube, and then enters the activated carbon desulfurization tower group with four parallel towers (one of which is periodically switched and regenerated), and the primary desulfurization rate is controlled to be greater than or equal to 70%, so as to prepare sulfuric acid with a concentration of about 30%.

Fertilizer preparation system —— In a conventional single-tank multi-slurry extraction tank, dilute sulfuric acid prepared by desulfurization at the same level decomposes phosphate rock powder (P2O5 content is more than 26%), and dilute phosphoric acid (its concentration is more than 10%) is obtained after filtration, and ammonium phosphate is prepared after neutralization by adding ammonia, which is used as a secondary desulfurizer, and the slurry after secondary desulfurization is concentrated and dried to prepare ammonium phosphate compound fertilizer. In order to improve the desulfurization efficiency, the process of calcium injection in the furnace and humidification activation of tail gas desulfurization is based on the process of calcium injection in the furnace, and a humidification section is added at the tail of the boiler.

In this process, limestone powder is mainly used as absorbent. Limestone powder is pneumatically injected into the furnace at the temperature of 850~ 1 150℃. Limestone is decomposed into calcium oxide and carbon dioxide by heating, and calcium oxide reacts with sulfur dioxide in flue gas to produce calcium sulfite. Because the reaction is carried out between gas and solid phases, the reaction speed is slow and the utilization rate of absorbent is low due to the influence of mass transfer process.

In the tail humidification activation reactor, humidified water is sprayed out in mist, which contacts with unreacted calcium oxide to generate calcium hydroxide, and then reacts with sulfur dioxide in flue gas. When the calcium-sulfur ratio is controlled at 2.0~2.5, the desulfurization rate of the system can reach 65~80%.

Due to the addition of humidified water, the flue gas temperature drops. In general, the outlet flue gas temperature is controlled above the dew point temperature 10~ 15℃. Humidified water evaporates rapidly due to the heating of flue gas temperature, and unreacted absorbent and reaction products are discharged with flue gas in dry state and collected by dust collector. The desulfurization process has been applied in Finland, the United States, Canada, France and other countries, and the maximum single unit capacity using this desulfurization technology has reached 300,000 kilowatts.

Flue gas circulating fluidized bed desulfurization process consists of absorbent preparation, absorption tower, desulfurization ash recovery, dust collector and control system. In this process, dry hydrated lime powder is usually used as absorbent.

8. What are the contents of desulfurization safety training?

Safety education is an important part of enterprise safety management, an important measure to fundamentally put an end to people's unsafe behavior and one of the important means to prevent and control accidents. Doing a good job in enterprise safety education and training can ensure the smooth progress of other safety work and safety production in enterprises. In order to make the company's education and training in 20 10 planned, focused and purposeful, the following annual safety education and training plan is specially formulated.

First, the basic idea

(a) to strengthen the safety awareness education of "safety first, prevention first". Safety awareness education is to help employees correct matters and improve their understanding of the importance of safety production through in-depth and meticulous ideological work. On the basis of improving ideological understanding, correctly understand and actively implement relevant safety production rules and regulations, strengthen self-protection awareness, do not operate illegally, do not violate labor discipline, and achieve "three no injuries": do not hurt yourself, do not hurt others, and do not be hurt by others.

At the same time, managers at all levels of the company (including leaders, company departments, workshop managers, technicians, etc.). ) We should also strengthen safety awareness education, ensure that we take the lead in our work, attach importance to safety production from the perspective of caring for people and life and health, and do not give orders in violation of regulations.

(two) the safety education throughout the whole process of production, enhance the enthusiasm of all staff to participate and the long-term safety education. Realize "all-round, all-round and whole process" safety education. Because production and safety are inseparable unity, where there is production, safety education is needed.

(three) to carry out various channels and forms of safety education. The forms of safety education should be adapted to local conditions, different from person to person, flexible and diverse, and try to adopt interesting, cognitive and acceptable ways. According to the specific situation of our company, the forms of safety education mainly include the following aspects:

(1) Meeting format. It mainly includes: safety knowledge lectures, symposiums, reports, advanced experience exchange meetings, accident lessons on-site meetings, etc.

(2) suspension form. It mainly includes: safety publicity banners, slogans, signs, pictures, safety publicity columns, etc.

(3) Audio-visual products. Mainly includes: safety education CD, safety lecture video, etc.

(4) Field observation and demonstration. It mainly includes: demonstration of safe operation method, fire drill, demonstration of electric shock first aid method, etc.

(4) Strictly implement the company's three-level safety education system, and put an end to the phenomenon of directly taking posts without three-level safety education. For new employees and new workers entering the factory, three-level safety education (including factory-level, workshop-level and team-level safety education) should be strictly required. The study contents include safety technical knowledge, equipment performance, operating rules, safety system and prohibited items, and only after passing the examination can they enter the operating post. The examination situation should be recorded, and the time of level 3 safety education should be no less than 24 hours.

Second, the main training content plan:

Main trainer of time theme mode education target audience

Three-level safety education throughout the process, strengthening the safety quality of new employees, new employees entering the factory security officers, etc.

1 month to publicize national safety laws and regulations, strengthen employees' legal awareness, and be a full-time safety officer.

February safety production management knowledge and safety production technology expertise

Strengthen the safety awareness of the staff and all staff safety officers in the class.

Safety operation procedures for marching posts; Strengthen the safe operation of employees in the class. Workshop personnel safety officer

In April, a safety knowledge education meeting for each post was held to publicize and familiarize the personnel of each post with their own post knowledge, and the safety officers of each post operator.

The safety education meeting for company managers in May strengthened the safety awareness of managers and the leading role of company managers' safety officers.

6, July, to carry out fire safety knowledge training and education, summer safety knowledge education lectures, publicity, etc. Make employees understand the importance of fire prevention and how to put out the fire.

In order to prevent heatstroke and electric shock accidents, all employees, firefighters, security officers, etc.

Analysis of typical accidents and emergency rescue cases in August; Promote and strengthen employees' safety awareness and ability to deal with emergencies, and all employees' safety officials.

Safety production rules and regulations and labor discipline in September; Class to ensure safety in production, all staff safety officer.

10 safety education class for special operators to strengthen the safety skills and quality of electricians, welders, drivers and other special operators.

1 1: Provide education, publicity and on-site guidance on the use of labor protection articles to ensure that employees know the function of wearing labor protection articles and how to wear them. All employee safety officers.

65438+Summarize the safety training activities in February 2009, and make the safety training plan for the next year.

Third, the requirements

1. The specific training plan shall be formulated one month before the training, submitted to the leaders for approval, and the relevant personnel participating in the training shall be informed in time to make preparations.

2. After the training, the training effect should be comprehensively summarized.

3. Safety training and education activities that cannot be held on schedule should be reported to the superior in time, explaining the specific time and reasons.

4. At the end of the year, write a summary report on the annual training and education activities, put forward the missing aspects in this year's training and the aspects that should be paid attention to in future education, and make a safety training and education plan for next year.