What part of the body including the boiler? What role have? It comprises a crucible and the furnace: a body: refers to a soda boiler system, which is superheated by the reheater water preheating system and a vaporization system composed of dry steam. The role of the high-pressure boiler feedwater heater through the further heating evaporation, for the purpose of blowing rpm turbine to do work. System configuration: economizer, the drum, the downcomer, water wall, superheater, reheater, economizer high pressure heater outlet feedwater is introduced into the economizer, economizer tube within an outer absorber tube gas and fly ash heat, water temperature increases to about 300 ℃ drum water out from the economizer line into the bubble along the top of the boiler disposed outside. Drum lower half of the water, the upper half steam. Unsaturated high pressure drop along the water reaches the bottom of the bubble tube at the bottom of the lower header outside the boiler, a number of pipes mounted in parallel on the bottom of the boiler around the lower header, the furnace by the upward flow of the absorbent in the central flame of the inner tube wall pipe convective heat radiation heat transfer and high temperature flue gas. Since the heat absorption is much less than the water vapor, the water wall within a predetermined vaporization rate can not be greater than 40%, because the working fluid will easily melt late Wall water absorbing tube rupture occurred. Downcomer role is water vapor to the bag waterwall lower header, to establish a water circulation. Wall water in the tank through the second line and then returned to the boiler water wall, the water in the drum is completed, the downcomer, the circulation between the superheater waterwall separated in the steam drum is withdrawn from the top of the drum, laying into the first top ceiling superheater, then through the cladding wall superheater, low temperature superheater, platen superheater, to a high temperature superheater, after reaching the rated temperature of the heating steam turbine into work. After the reheater boiler is also provided with a large reheat means that steam from the high pressure cylinder acting, temperature and pressure of the exhaust gas is reduced, the exhaust gas is heated to a reheater, and then returned to the steam turbine, a low pressure cylinder continues to work. Furnace body: it refers to a boiler furnace combustion system and its role is to heat the fuel combustion in the furnace as much as possible and transfer heat to the working fluid, and the completion of the water wall and economizer water water heated in the tubes, heated in the dry steam superheater and reheater tubes, the air in the air preheater tube heated. The system consists of: a combustor, furnace, air preheater. Production process: raw coal from the coal by the belt conveyor to the higher field position of the coal bin, the bottom of the coal from the coal bin out through the stoker evenly into the ground to a coal mill. Nature of the atmosphere via the air inlet of the blower is arranged in the vertical flue to the boiler air preheater, subjected to heat of the flue gas, flue gas waste heat recovery. About 250 degrees out of hot air into two air preheater from: one directly introduced into the burners of the boiler as secondary combustion air into the furnace; the other can be introduced into the mill inlet for drying, transporting coal, which said primary air portion of hot air. Excellent flow of drying gas and pulverized coal mixture powder consisting of primary air, conveyed via line separator to be coarse coarse separator, the separated coarse powder inlet sending back regrind mill, and eligible powder and primary air mixture into pulverized powder separator, gas separation, the separated coal fines into storage to save it from the powder according to the magnitude of the thermal load of the boiler, the control of coal flow discharged coal warehouse bottom while separated from the fines separator as the primary air pulverized coal power delivery, after the pressing of mill powder mixture with the gas mixture into a fine powder fed again by a burner into the combustion furnace.
The main characteristics of the indicators boiler What? To demonstrate configuration, capacity, parameter and economical operation of the boiler, etc., generally represented by the following indicators to the basic characteristics of the boiler. A) evaporation industrial boilers evaporation is generally 0.1 ~ 65t / h. For the hot water boiler with a nominal thermal power of its capacity to indicate the size, in units of MW. (Ii) pressure and temperature for saturated steam production boiler, just indicate steam pressure. For the production of superheated 10 bar coal steam boiler, the steam temperature of the steam must be marked at the outlet of the superheater, i.e., superheated steam temperature, the unit is deg.] C. For hot water boiler, the hot water temperature has rated outlet and rated the import of sub backwater temperature. With rated thermal power, rated water temperature and the return temperature corresponding to the rated nominal referred circulating water flow of water through the hot water boiler, the unit is t / h. Heating boiler (iii) an evaporator heating surface and the heating surface of the heat generation rate surface evaporation rate or heating rate is an indicator of the intensity of the boiler work, the greater the numerical value, the better the heat transfer, the smaller the amount of metal consumed boiler. Heating surface evaporation rate general industrial boiler is less than 40kg / (m · h); heating surface of the heating rate of hot water boiler is less than 83700kJ / (m · h) iv) the thermal efficiency of the boiler which is an index indicating economical boiler heat, general industrial combustion thermal coal boiler efficiency of around 60% to 82%. Sometimes, in order to measure the heat economy schematically steam boiler, are also commonly used coal or coal water vapor than the ratio expressed as the ratio of the amount of coal in the boiler per unit time over the period of time and the amount of steam production. Coal-water ratio of about the size and type of boiler, coal quality and operation management quality and other factors. Industrial boilers coal-water ratio is generally l: 6 ~ 1: 7.5. Description (a) Evaporation: desired amount of steam produced per hour steam boiler called evaporation, the unit is t / h steam boiler showed that the size of the rated capacity of evaporation, i.e. in boiler design parameters and ensure a certain efficiency. maximum continuous evaporation, also known as the rated output of the boiler (ii) pressure and temperature: the rated pressure steam boiler of the steam at the outlet of the steam or the hot water boiler rated working pressure rated pressure at the outlet of the hot water boiler is called, and He said maximum working pressure, in units of MPa (iii) an evaporator heating surface and the heating surface of the heat generation rate: refers to the heating surface of the pot soft drinks and other heat transfer medium and the flue gas heat exchange area of the pressure receiving member, usually with smoke metal surface area of the gas-side heating area is calculated, in units of square meters. the amount of steam per hour per square meter of the resulting heating surface, called boiler heating surface evaporation rate, in units of kg / (m · h) per hour hot water boiler m² heating surface of heat generated by the heat generation rate is referred to as heating surface, the unit is kJ / (m · h). (Iv) thermal efficiency: thermal efficiency of the boiler is a boiler effective utilization percentage of the heat input and heat boiler per unit time, also called boiler efficiency, [eta] is represented by the symbol.
Dairy production and processing sectors, need a lot of steam on food drying, sterilization, stereotypes, such as processing, 10 bar coal steam boiler essential. Xinjiang Ake Su Xinnong Dairy Co., Ltd. as a local brand, has a large market users. 2016, Akzo increased demand for dairy production, the original steam boiler company can not meet today's production needs. In the same year, Akzo dairy cooperation with our company, signed a series SZS 6 tons of steam pipe steam boilers, steam support for the dairy industry dairy production Aksu.
The transformation of low nitrogen boiler should be noted that what matters for retrofitting low nitrogen boiler should be noted that what? Of nitrogen oxide emissions is large, complex sources, environmental problems caused by acid deposition, fine particles, ozone, nitrogen oxides and analysis of contamination status must be further strengthened. If you do not take further measures to reduce emissions, with the United States and the United States to speed up economic development, population growth and urbanization, nitrogen oxide emissions will continue to grow in China in the future. Based on current trends, by 2030, emissions will reach 35.4x106 tonnes, will inevitably cause serious environmental impacts. Therefore, we must effectively enhance the emission control of nitrogen oxides. From this we can see that low nitrogen boiler is imperative! A check device to check for low NOX combustion gas before commissioning is in place, the gas pipeline flow is clean, whether the valve is open. There is a burner pipe leaks, reasonable pipeline installation. Discharging vent pipe valve from the foregoing, to ensure that no mixing of the air duct, and the exhaust pipe should be connected to the outdoor. Second, stable combustion and combustion of homeostasis Remember, combustion adjustment is the basis for all of the low nitrogen burner adjustment, as long as guaranteed under any changes in operating conditions of combustion stability and combustion of dynamic equilibrium, to burn steam temperature influence is even greater. Since the steam temperature is a sign flue gas heat value balance between the steam and heat absorption, this can be maintained as long as the dynamic balance, steam temperature can be kept stable. Third, the level of flame boiler boiler central flame center is also an important factor in high impact low-temperature steam. In the high temperature steam operation, the amount of coal combustor exhaust can be reduced, the amount of the lower stage burner of coal may be increased, and vice versa. Running low nitrogen burners, it should also be noted effect of different combinations of temperature steam mill. Steam at a low temperature exhaust composition regulating a large margin, the combination of the high temperature exhaust temperature adjusting stage so small margin overheat. It should be strengthened and soot blowing air distribution according to the situation.