1, power station boiler: boiler for thermal power plants, with large capacity, high parameters, new technology and strict requirements. It is the main product of Shanghai Boiler Factory.
2. Industrial boilers: boilers that provide steam or hot water in textile, printing and dyeing, pharmaceutical, chemical, oil refining, paper making, heating and refrigeration industries. It is one of the products of Shanghai Boiler Factory.
3. Household boilers: boilers that provide low-parameter steam or hot water for various industries, enterprises and institutions, hotels and service industries. This kind of boiler is in great demand, and there are many manufacturers all over the country.
4. Special boilers: such as double double steam cycle boilers, nuclear fuels, ships, locomotives, waste liquid, waste heat, once-through boilers, etc.
Second, according to the type of ontology structure
1, shell boiler: combustion and endothermic evaporation are completed in a cylinder, which is divided into horizontal and vertical types, such as Lanzhou Development in the early days, firecracker furnace, etc.
2. Water tube boiler: The boiler whose main heating surface is tube is a major improvement of the early boiler, and its safety and reliability are greatly improved.
3. Drum boilers: boilers with drums placed outside the fire side and not heated, including double drums, single drums and multiple drums, with drums arranged horizontally and vertically.
Third, in a circular way.
1. Natural circulation boiler: The working medium in the water wall tube flows and circulates, and the circulating head is established by the specific gravity difference of the working medium between the ascending tube and the descending tube, resulting in natural circulation. This kind of boiler is only suitable for subcritical pressure.
2. Control the auxiliary circulating boiler: add a circulating pump between the water wall and the downcomer to overcome the flow resistance and ensure the safe and reliable water circulation. Suitable for subcritical and near-critical pressure boilers.
3. Once-through boiler: a boiler that passes through all heating surfaces at one time from water to superheated steam outlet according to the pressure of feed water pump. Suitable for high pressure or supercritical pressure.
4. Combined cycle boiler: A boiler with controllable forced recirculation system is added to the evaporation section of once-through boiler, so that the water wall can maintain a good running state at low load or start-up, and enter pure once-through operation at high load.
5. Low-rate circulating boiler: The principle is similar to that of controlled circulating boiler, which can reduce the circulating rate of water wall to about 100 and accelerate evaporation.
Matters needing attention
1. The boiler shall be accompanied by "design documents, product quality certificates, safety and maintenance instructions, supervision and inspection certificates (safety performance supervision and inspection certificates) required by safety technical specifications" when leaving the factory.
2, boiler installation, maintenance and transformation. Units engaged in boiler installation, maintenance and transformation shall obtain the qualification certificate of special equipment installation and maintenance issued by the Provincial Bureau of Quality and Technical Supervision before engaging in boiler installation, maintenance and transformation. Before construction, the construction unit will inform the special equipment safety supervision and management department of the municipality directly under the central government or its jurisdiction in writing about the installation, maintenance and transformation to be carried out, and send the commencement notice to the local county-level quality and technical supervision bureau for the record, and the construction can only be started after the notice.
3. Acceptance of boiler installation, maintenance and transformation. After the completion of construction, the construction unit shall report the boiler hydrostatic test and installation supervision and inspection to the Special Equipment Inspection Institute of the Bureau of Quality and Technical Supervision. After passing the inspection, the Bureau of Quality and Technical Supervision, the Special Equipment Inspection Institute and the County Bureau of Quality and Technical Supervision will participate in the overall acceptance.
4. Boiler registration. After the acceptance of the boiler, the user must fill in the boiler (general survey) registration form in accordance with the regulations on the registration and use of special equipment, register with the Bureau of Quality and Technical Supervision, and apply for the registration certificate for the safe use of special equipment.
5, the operation of the boiler. Boiler operation must be operated by certified personnel who have been trained and obtained the certificate of special equipment operators, and the operating procedures, eight systems and six records must be strictly observed during use.
6. Boiler inspection. The boiler shall be inspected regularly once a year, and the boiler without regular safety inspection shall not be used. The safety accessories of the boiler shall be inspected regularly once a year, and the pressure gauge shall be inspected once every six months. Safety accessories without regular inspection shall not be used.
7. It is forbidden to install atmospheric boilers as pressure boilers. It is forbidden to use boilers with three incomplete safety accessories: water level gauge, safety valve and pressure gauge.