small size wood water boiler

Maintenance of the boiler plant food during the maintenance shutdown has deactivated which is to prevent boiler corrosion. Since boiler shutdown, a large boiler humidity, poor ventilation, if long-term in a wet state, oxygen in the air with the metal heating surface of the wet complete contact, the inner surface layer of brown rust generated; in addition, often the heat receiving surface of the gas side accumulating ash particles during operation, after the shutdown in the humid environment, will cause corrosion of metals. In the boiler shutdown process, the main reason is the presence of moisture and corrosion of metal surfaces of the air. Thus, as long as the metal surface or a metal surface with dry air (oxygen) isolation, can effectively prevent corrosion. The length of the parking time, there are packing, Paul dry, wet security, ventilation PROTECTION. 1, pressure maintenance Pressure maintenance is suitable for up to one week shutdown of the boiler. The residue pot pressure 0.05 ~ 0.1MPa, temperature slightly above 100 ℃. Boiler pressure and temperature to maintain regular methods using steam heating the water adjacent to the boiler, a heating boiler or intermittently. 2. Dry Dry care maintenance is a method to protect the desiccant into the pot and in the furnace. Its purpose is to keep no water jug. The utility model is suitable for long-term or seasonal shutdown boiler heating boiler. Open manholes and hand holes, the header and the drum-dried. When wet boiler room, with appropriate use of the furnace heat or light burning wood, so that the furnace, the furnace wall flue drying. After drying the boiler is cooled, the opening and tray formulated desiccant tube is placed in the pot, and a collecting box grate, then tightly closes the inlet aperture, and a valve connected to the hand hole to prevent air from entering. For some Mifengbuyan valves, plug board should be increased.

Gas-fired steam boiler which uses? Gas-fired steam boiler plays a very important role in the production and life. Very extensive use of the boiler, mainly classified into: 1, through a heat exchanger to convert the heat into water vapor, and the water is heated, and then heating, bathing and production purposes. 2, food processing, pharmaceutical industry, for disinfecting bottle filling, the food industry can be used for meat, steamed. Wine is made with steam. Further, in the petrochemical industry, oil and steam may be heated to increase the fluidity. Steam is also used in petrochemical production process. Production enterprises, using steam is widely used, such as foam insulation panels, foam material is heated to produce steam for production. Furniture made of wood furniture must be made to steam drying. Inflatable brick buildings have steam drying, you can also generate electricity and so on.

The level of development of the industry and domestic and international comparative analysis gap - fuel gas-fired boilers, biomass boilers 1 Fuel gas-fired boiler fuel gas-fired boiler horizontal development originated in Europe, such as Cochran, Lancashire; therefore Horizontal Oil and Gas Fired Boiler Technology Europe has been a leader in Europe again as the benchmark German boiler manufacturing technology, currently well-known European brands Bosch (Rolls), Viessmann, Ferroli, Hoval, Cochran, United States Fulton, House special, CB boilers. In Europe three-pass boiler mainly horizontal, or add tail economizer, exhaust minimum design around 110 deg.] C, was added a small amount of the exhaust gas temperature around the condenser 55 ℃; U.S. horizontal boiler return in two or four-pass structure. Our horizontal boiler developed rapidly, mainly in the three return main part of the condensing boiler using two horizontal return plus energy-saving and condenser, structural design has been very mature, manufacturing level has been less than foreign companies. Fuel gas-fired water tube boiler technology comes mainly from the former Soviet Union, famous brands Alstom, the United States and 芬兰诺威特 CB, water tube boiler design China has reached a high level, there are double drum "D" type, "O "type, the three drum type" A ", single drum" π "type, forced circulation" π "shaped tube frame structure design are mature, the domestic market for the introduction of 芬兰诺威特 plumbing tube furnace and convection combination smoke type furnace, overhead burner; Alstom tube furnace convection module assembly for the front plus the flag type furnace. In Europe, condensing gas boiler is widely used, but the European condensing boilers are small capacity boilers, less large condensing boiler; a monolithic multi-condensing boiler, furnace boiler applied less ordinary form of a condenser; less 1.4MW condensation boiler with a premix burner; multi-cast aluminum-silicon alloy material and a steel material; heating surface enhanced heat transfer using a special multi-heated element; and multiple heat pumps, solar heating systems and other components, thereby obtaining a higher energy efficiency. While the United States is currently on the rise in the condenser plus the original boiler flue gas condensing heat recovery work, 316L are connected through grooved tubes with removable ferrule connector and header, to facilitate maintenance and replacement. Europe oil and gas boilers have a predetermined minimum boiler thermal efficiency, the lowest thermal efficiency divided by the low calorific value of three categories, namely: a standard boiler efficiency of 82 to 88%; low boiler efficiency of 88.5 - 91.5%; condensing boiler, 97.5 to 99.5% efficiency. European EN6762000 regulations on NOx emissions from burning natural gas value points 1, 2, Level 3 is the lowest emissions, NOx emission value ≤80mg / kWh; US Government regulations California natural gas-fired boiler NOx emissions of different capacity is 10 ~ 25mg / m3 (standard state). Technology development and product manufacturing quality of fuel gas-fired boiler of "Twelfth Five-Year" period made considerable progress, compared with similar foreign products, the gap is not very big, not only greatly improve the level of automation, thermal efficiency and appearance of the product quality has improved very fast, gradually replacing the imported products, imports of fuel gas-fired boiler sales decline every year in our country, but our fuel gas-fired boiler technology still has the following problems: ① domestic production of large gas-fired boiler fuel companies, most based on imitation, product performance quite different; ② domestic only a few manufacturers have the ability to test the boiler plant; boiler for different operating conditions for the verification test less, but rather in order to meet the test requirements factory boiler; heat transfer performance were inadequate in addition to a single heat transfer element research and capacity testing. Compared with European products ③ domestic product, manufacturing details, but also save big big gap on the apparent quality. European industrial design, details of the deal in place, the overall appearance. ④ domestic condensing boiler technology, low nitrogen emissions, and improved technology requires further study; relevant technical standards and specifications needed to improve and increase the thermodynamic calculation of aspect smoke wind resistance calculation, performance test and evaluation. 2 boiler technology research of biomass boilers biomass was first taken seriously in the Nordic countries, followed by the United States carried out a lot of research and development work. Biomass boiler technology is relatively common applications, technology is more mature in foreign countries. They developed products are: ① circulating fluidized bed boiler combustion raw material; ② large-scale burning of wood waste boiler circulating fluidized bed power generation; ③ straw water-cooled vibrating grate boiler, are representatives of foreign development of biomass boilers. Biomass combustion technology and our relation to Germany, Sweden, Denmark, Japan and other countries still in its infancy, the need for pretreatment of biomass, etc., combustion mechanism, boiler design, corrosion, emission reduction and other key technologies research and a breakthrough in order to reduce dependence on coal, oil, and promote the development of related products. The gap between domestic and biomass boilers are mainly: ① foreign biomass boilers generally to large-scale, automated heating direction, more varieties of biomass feedstock used, relatively complete supporting facilities, boilers used for civil applications, using a water-cooled furnace row structure. ② domestic biomass boilers are generally used for power generation. Combustion way they use chain grate, or reciprocating grate combustion CFB combustion mode. ③ uncertain national policy development of biomass boilers, emission requirements around the biomass boilers of different pollutants, resulting in the pace of development of biomass boilers are different. ④ biomass boiler system of design, technology is not advanced enough, need to continuously develop advanced products and technology, especially boiler combustion technology, designed to optimize product performance, environmental emissions targets need to be strictly controlled and continues to increase.

10th June this year, the provincial government agrees that the ecological environment in Zhejiang Province Office issued the "Notice on the implementation of special emission limits national emission standards of air pollutants" (hereinafter referred to as "notice"), marking the full implementation of Zhejiang Province especially national emission limits of air pollutants.

"Special emission limits" is mainly for land development density is already high, the environment carrying capacity began to weaken, or less atmospheric environmental capacity, ecological environment is fragile, more stringent prone to serious air pollution problems in sensitive areas and set the emission limits. Implementation of the national emission standards for special emission limits, Zhejiang Province in favor of further strict pollution management, reduce pollutant emissions, to further improve air quality, but also help promote the integration of the Yangtze River Delta environmental standards.

In fact, back in 2013, Zhejiang has already begun in some areas particularly the implementation of the national emission standards limit emissions of air pollutants, but was limited to Hangzhou, Ningbo, Huzhou, Jiaxing and Shaoxing, Hangzhou Bay five cities; and this is to expand to the province level. In addition to a wider geographical range, "advertisement" clearer pollutant emissions targets, e.g., volatile organic contaminants not individual indicators, including not only non-methane hydrocarbons, total volatile organic compounds such as benzene, benzene and other pollutants indicators meet the definition of volatile organic compounds should be performed; also more involved in the industry, such as boilers only provides original coal-fired boiler, and "notice" it covers all types of boilers (including oil, gas).

It is reported that, in the national emission standards have been implemented, a total of 25 standards set emission limits of air pollutants in particular; at the same time, the recent ecological Ministry of Environment and the State Administration of market regulation has released three national emission standards of air pollutants, namely, pharmaceuticals, paints, inks and adhesives and volatile organic compounds fugitive emission control standards, and will be from July 1, 2019 implementation. According to "notice" requirement, the province is also involved in the enterprise should implement special emission limits specified in the three standards, the execution time of the emission standards time synchronization. Provincial Department of Atmospheric environment Department official said: "The implementation of the national emission standards for emission limits in particular, help to further strict management of our province pollution, reduce pollutant emissions, to further improve air quality, but also help promote environmental protection in Yangtze River Delta standard integration. "

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