Function With the continuous development of new energy, straw utilization has become one of the new projects, such as boiler spraying, straw vaporization, fermentation treatment, straw board, straw returning to the field, feed processor of grass processing enterprises, straw feed factory, pellet feed processor, bio-power plant, cattle raising, sheep raising, straw charcoal factory, density board, straw door, straw charcoal, straw board, feed and many other fields. Straw utilization shows great development potential in many projects. Qufu Xinlujin adopts the original two-stage pulverizer technology, which can quickly remove all kinds of crop straws, branches, cotton straws, corn straws, wheat straws, rice straws, peanut seedlings, sweet potato seedlings, corn, sorghum, dried sweet potatoes, broken bean cakes and dried beans. No need to hold it manually; Manual pretreatment does not need a manipulator to feed at the feed inlet, which overcomes the disadvantages of difficult feeding, high labor cost and low efficiency of the previous pulverizer, and only needs to pick with a stick; Turn over; All kinds of labor, such as mechanical grass grabbing, whole bundle feeding, mechanized belt conveyor transportation, etc. Mechanical feeding mode. The whole bundle of materials is directly put into the crushing bin one meter away from the special coarse crushing bin for the fence, and the straw is automatically fed. After rough processing, it automatically enters the crushing room for secondary crushing. The processing range is 1-30 mm, and the length of raw materials is not limited. It is the most advanced bran powder processing equipment in China.
The crushing of feed raw materials is a very important link in feed processing. Through crushing, the large total surface area of raw material particles per unit mass can be increased, the solubility of feed nutrients in animal digestive juice can be increased, and the digestibility of animals can be improved. At the same time, the particle size of crushed raw materials is small, which has a very important influence on the difficulty of subsequent processes (such as granulation) and the quality of finished products; Moreover, the size of crushing particle size directly affects the production cost. When producing powdered compound feed, the power consumption of crushing process accounts for about 50% ~ 70% of the total power consumption. The smaller the crushing particle size, the more favorable it is for animal digestion and absorption, and the more favorable it is for granulation, but at the same time, the power consumption will increase accordingly, and vice versa. The total amount of crushing and processing in China reaches more than 200 million tons every year. As the main equipment of feed industry, feed pulverizer has great influence on feed quality.
The formation of feed reward and feed processing cost is an important factor. Therefore, it is an important problem in feed production to master the grinding technology correctly and choose the appropriate grinding mode.
Movable type pair movable type drum
It is a machine that saws and grinds feed by using a pair of relatively rotating cylindrical grinding rollers. It has the advantages of high productivity, low power consumption and convenient adjustment, and is mostly used in wheat milling industry. In feed processing industry, it is generally used in the first process of secondary crushing operation.
Hammer type
It is a machine that uses a high-speed rotating hammer to break feed. The utility model has the characteristics of simple structure, strong universality, high productivity and safe use.
Claw type
It is a machine that uses high-speed rotating teeth to crush feed, which has the advantages of small volume, light weight, fine product granularity and high working speed.
Main index 1, productivity: hourly production capacity kg/h.
2. Quantity of products per kWh: the quantity of crushed products per kWh (kg/kWh). This indicator measures the performance of several different types of pulverizers.
3. Fineness: refers to the average diameter of feed particles after crushing, which represents the degree of crushing.
4. Determination of fineness:
GB59 15-86 stipulates that k is expressed as a percentage of sieve:
K= importance of the feed left on the sieve /* 100% sample.
Sampling 65,438+000 g, sieving continuously for 65,438+00 minutes in the electric national shaking sieve machine specified by the national standard, weighing the feed retained on each sieve layer, and then calculating K. If there is no such sieve, sieving with the electric sieve with flour thickness can be used (or sieving manually for 5 minutes).
2) Geometric average particle size method
3) Taylor sieve (exotic) method: expressed by particle size coefficient (MF) and uniformity (MC).
Crushing is a process in which external force overcomes the cohesion between molecules and breaks them. The basic method is as follows.
1, crushing: mainly depends on the high-speed operation of parts, and the impact produces fragments. This method has high productivity, less calorific value and less ash powder, and is suitable for adding brittle materials.
2. Crushing: The feed is crushed by the hard surface friction of two original disks, which has the advantages of low manufacturing cost and low power, but has the disadvantages of high temperature, more powder and difficult control of fineness. Suitable for processing materials with high plasticity.
3. Crushing: Two rollers with smooth surfaces are used to crush feed at the same speed, which is often used to crush feed such as barley and feed large livestock.
4. Sawing: The material is chopped by two grinding rollers with teeth on the surface and different rotational speeds. Its advantages are easy to dig thick, less wool and easy to store, and it is suitable for processing grain, cake residue and so on.
According to the production capacity.
The specifications and nameplates of general pulverizers include the determined production capacity (kg/hour) of pulverizers, but there are several points to be noted:
The rated production capacity is listed in 1. Refers to the output in a specific state, such as a grain feed pulverizer, which means that the raw material for pulverization is corn, and its moisture content can be safely stored (about 13%), and the screen aperture is 1.2 mm. Because corn is commonly used in grain feed, a screen with a diameter of1.2 mm is generally used as the minimum screen aperture, and the production capacity is small at this time.
2. The production capacity of the selected pulverizer should be slightly greater than the actual production capacity, otherwise it will increase the hammer wear and air leakage in the air duct, which will lead to the decline of production capacity and affect the continuous production and supply of feed.
According to the choice of crushing raw materials
Mainly crushing grain feed, you can choose a hammer crusher with top feeding; Claw crusher can be used to crush bran and wheat feed; If good universality is required, mainly crushing grain, taking into account cake grain and straw, you can choose tangential feed hammer crusher; Crushing mineral raw materials such as shells, shell screenless crusher can be selected; If it is used as the pretreatment of pre-mixed feed, the particle size of the product is required to be very fine and can be adjusted according to the needs, and a special screenless pulverizer should be selected.
According to the layout method selection
There are three ways to output the crushed finished product through the discharging device: self-weight blanking, negative pressure suction and mechanical transportation. Small single machine mostly uses self-weight blanking to simplify the structure. Most medium-sized pulverizers are equipped with negative pressure suction devices, which have the advantages of absorbing the moisture in the finished products, reducing the humidity in the finished products, facilitating storage, improving the pulverizing efficiency 10%~ 15%, and reducing the dust content in the pulverizing room.
According to the matching power selection
Both the machine manual and nameplate contain the wattage of the motor supporting the pulverizer. It often represents a certain range rather than a fixed number. For example, 9FQ-20 pulverizer with supporting power of 7.5 kW ~11.0 kW; 9FQ-60 pulverizer with supporting power of 30 kW ~40 kW. There are two reasons: first, the power required by different kinds of crushing raw materials is very different, for example, under the same working conditions, the power of crushing sorghum is twice that of crushing corn; Second, when different sieve holes are used, the load of the pulverizer has a great influence. Therefore, when using a sieve with a diameter of 1.2 mm, the motor capacity of 9FQ-60 pulverizer should be 30 kW ... When replacing the sieve with a sieve with a diameter of 2 mm, you can choose a motor with a diameter of 3 mm and a motor with a diameter of 22 kW, otherwise it will cause some waste.
According to the energy saving situation.
The pulverizer consumes a lot of energy, so energy saving should be considered when purchasing. According to the standards of relevant departments, when corn is crushed with a sieve with a mesh diameter of 1.2 mm, the output per kwh of hammer crusher is not less than 48 kg ... The output per kwh of domestic hammer crusher has greatly exceeded the above regulations, and the quality reaches 70-75 kg/kwh. The specification and nameplate of the power machine supporting the pulverizer are marked with the wattage of the motor supporting the pulverizer. The indicated power kilowatt is often not a fixed number, but a range. For example, the supporting power of 9FQ-20 pulverizer is 7.5-11kw; The supporting power of 9FQ-60 pulverizer is 30-40 kW.
There are two reasons for this. First, the power required by different kinds of crushing raw materials is very different. For example, under the same working conditions, the power of crushing sorghum is twice that of crushing corn; Second, when using different sieve holes, it has a great influence on the load of coal mill. When a sieve with a diameter of 1.2 mm is used, the motor capacity of 9FQ-60 pulverizer should be 40 kW. When replacing the sieve with a sieve with a diameter of 2 mm, the motor capacity should be 30kw；; When replacing the 3 mm diameter screen, the motor capacity should be 22 kW, otherwise it will cause some waste.
According to the standards of relevant departments, when the hammer crusher crushes corn with a sieve with a diameter of 1.2 mm, the output per kWh shall not be less than 48 kg. The quality has reached 70kg ~ 75kg per kWh.
Choose according to dust and noise.
Dust and noise in feed processing mainly come from pulverizer. These two indicators should be fully considered in the selection. If you have to choose a pulverizer with high noise and dust, you should take noise reduction and dust prevention measures to improve the working environment, which is beneficial to the health of operators.
Instructions for use 1. The pulverizer should be fixed on the cement foundation for long-term operation. If the working place changes frequently, the pulverizer and motor should be installed on the base made of angle steel. If the pulverizer is driven by diesel, the power of the two should be matched, that is, the power of the diesel is slightly higher than that of the pulverizer, the pulley grooves of the two should be consistent, and the outer end faces of the pulleys should be on the same plane.
2. After the installation of the pulverizer, check the fastening conditions of fasteners in various parts, and tighten them if they are loose.
3. Check whether the belt is tight and whether the motor shaft is parallel to the crusher shaft.
4. Before starting the pulverizer, rotate the rotor by hand to check whether the tooth claw, hammer blade and rotor are flexible and reliable, whether the shell collides, whether the rotor rotation direction is consistent with the direction indicated by the arrow on the machine, and whether the motor and pulverizer are well lubricated.
5, don't change the pulley casually, in case the speed is too high to make the crushing room explode, or the speed is too low to affect the work efficiency.
6. The crushing table will idle for 2-3 minutes after it is started, and then put into operation after there is no abnormal phenomenon.
7, work should always pay attention to the operation of the pulverizer, feeding evenly, in case of congestion, don't overload operation for a long time. If vibration, noise, overhigh temperature of bearing and machine body and material splashing are found, stop the machine immediately for inspection, and then continue to work after troubleshooting.
8, crushed materials should be carefully checked, so as to avoid copper, iron, stone and other hard objects into the crushing room to cause accidents.
9, the operator should not wear gloves, should stand on the side of the crusher when feeding, in case of rebound sundry hurt face.
Here are some models to look at.
SFSP series water drop pulverizers have high output and low energy consumption.
Advanced design of water drop crushing cavity and reasonable secondary crushing structure, the output is increased by 20% compared with other models;
Wear-resistant toothed plates are installed on both sides of the feed inlet, which effectively destroys the circulation of logistics, increases the collision, tearing and shearing of materials, and improves the crushing efficiency;
◆ The screen holes of the screen are arranged in a "star triangle", which increases the screening area, improves the screening rate and effectively improves the crushing efficiency;
◆ Set an air supply device at the shaft end to supplement the air volume of the crushing chamber, destroy the crushing cycle and reduce the temperature rise of the bearing;
◆ Two kinds of clearance between hammer and screen and two different rotor configurations are set, which are suitable for crushing raw materials of aquatic feed and livestock feed and improve their respective efficiency. ?
Super stable and durable
◆ The whole base is milled to ensure the stability of the whole operation;
◆ The hammer blade is made of special alloy steel and hardened by suspended tungsten carbide to achieve higher strength and durability;
◆ High-precision dynamic balance detects the rotor, which makes the operation more stable and the noise lower;
One by one, the running time is more than 45min, the stability is better than the national standard, and the vibration speed can reach 2-4mm/s (national standard ≤ 16mm/s).
Simple operation, more humane?
◆ Movable operation door and linkage screen pressing mechanism make operation and maintenance more convenient;
◆ Equipped with safety interlock device to protect personal safety;
According to the actual demand, various feeding devices such as screws and impellers can be selected.
SFSP series water drop pulverizer (high power white) has high output and low energy consumption.
◆ Optimize the rotor structure. The large-diameter rotor can effectively adjust the airflow direction in the crushing chamber, so that the material can be in the effective crushing area, which can improve the output and reduce energy consumption;
◆ The initial acceleration part of crushing is provided with a wear-resistant toothed plate, and the U-shaped secondary impact groove at the bottom makes the material impact more thoroughly;
◆ The hammers are staggered to increase the effective screening area, so that the hammers wear uniformly and the service life of the hammers is prolonged;
Multi-cavity crushing cavity can reduce screen loss and adjust particle size flexibly;
The dense hammer design is suitable for coarse and fine crushing of raw materials, with uniform crushing granularity and new high micro-crushing performance.
Super stable and durable
◆ The whole finish milling base has small vibration and stable operation. In the working state, the coin can be in an upright state;
◆ High-precision dynamic balance is used to detect the rotor, so the vibration of the equipment is small and the noise is low;
◆ The hammer head is made of special alloy steel and hardened by suspended tungsten carbide to achieve higher strength and durability;
One by one, the running time is more than 45min, the stability is better than the national standard, and the vibration speed can reach 2-4mm/s (national standard ≤16 mm/s);
◆ The new snake spring coupling (plum blossom coupling) has good shock absorption performance, large bearing capacity, large displacement compensation space and reliable operation, which effectively avoids bearing heating.
Simple operation, more humane?
◆ Movable operation door for easy maintenance;
◆ Multi-level linkage screen pressing mechanism makes screen changing more convenient;
◆ Optimize the structure of pin shaft and pin sleeve, making it more convenient to replace the screen;
◆ Omni-directional linkage control system ensures the safe operation of equipment at all times.
FSBP series non-stop screen-changing pulverizer ◆ Online fast screen-changing design to improve screen-changing efficiency;
◆ Screening the anti-interference design of the track to ensure smoother screening;
◆ Up to 3000 rpm /3600 rpm (60HZ) to improve grinding fineness and efficiency;
◆ Reasonable feeding and fixed hammer design, destroying the crushing cycle;
◆ Equipped with SKF progressive automatic lubricating bearing and bearing seat;
◆ The overall heavy-duty finish milling shockproof base has better stability.
SWFL series superfine pulverizer ◆ The pulverizing chamber and airflow classification chamber are integrated, which can complete the processes of pulverization, airflow classification and re-pulverization at the same time;
◆ The grinding fineness can be adjusted arbitrarily between 60- 180 mesh;
The gear ring and hammer body adopt special technology, which significantly improves the grinding fineness and output;
The gear ring and hammer body coated with cemented carbide have long service life and low cost per ton;
◆ The main bearing adopts "SKF" bearing to ensure stable and efficient operation;
◆ The overall heavy-duty flat frame is firmer, with good stability, shock resistance and shock absorption;
◆ It can be widely used for superfine grinding of corn, wheat, dried fish, shrimp shells, monosodium glutamate, glucose, medicines, activated carbon and other materials.
I hope it helps you.