What part of the body including the coal fired sthorizontal coal fire steam eam 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the drum is completed, the downcomer, the circulation between the superheater waterwall separated in the steam drum is withdrawn from the top of the drum, laying into the first top ceiling superheater, then through the cladding wall superheater, low temperature superheater, platen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.
By the end of 2018, Wu'an Municipal People's Government of Hebei Province issued a notice on the issuance of "blue sky Wu'an winning three-year action plan to defend the war", referring to the notification: By the end of 2019, the city has a depth of discharge conditions for reconstruction the coal-fired units completed in-depth treatment, meet the relevant standards. Implementation of coal-fired power management depth. Implementation of coal-fired power plants and coal-fired units emission performance management, emissions of coal-fired units to assess the performance rankings, and resolutely out of shutting down environmental protection, energy consumption, security is not up to 300,000 ten million coal-fired units.
First, the implementation of in-depth treatment of coal-fired power plant
Implementation of coal-fired power plants and coal-fired units emission performance management, emissions of coal-fired units to assess the performance rankings, and resolutely out of shutting down environmental protection, energy consumption, safety and other 300,000 kilowatts coal-fired units of non-compliance. 2018, 2019, 2020, respectively, by province and Handan given task given the amount of closed down. Heating demand complete transformation of 600,000 kilowatts grade pure condensing units, high-capacity, high-parameter units accounting for 90%
Special action to carry out deeper cuts power industry, coal-fired units in the original ultra-low emissions, based on the further optimization of operational management, improve pollution control facilities, improving removal efficiency, the implementation of colored smoke plume power plant management. Before the end of 2019, the city has deeper emission coal-fired units to complete the transformation of the conditions of the depth of management, meet the relevant standards.
Second, to carry out special treatment industrial furnaces
The development of industrial furnaces comprehensive remediation plan to carry out an intensive investigation of industrial furnaces, establish classification list management. Stringent emission standards, increase efforts to eliminate non-compliance of industrial furnaces, accelerate the elimination of small and medium gas furnace. Under the premise of resources to implement and encourage industrial furnaces use electricity, natural gas and other clean energy or heat from the surrounding power plant. Ban coal stove, substantially eliminated cogeneration heating pipe network coverage in the range of coal heated oven (furnace); out hearth diameter of 3 m or less gas furnace fuels, natural gas use conditions have temporarily , building a unified center of clean coal gas principle; prohibition blended with high-sulfur petroleum coke.
Learning materials heat coal fired sthorizontal coal fire steam eam boiler 1, the boiler is three safety accessories: water gauge, pressure gauge, safety valve. 2, the normal operation of the boiler water level is 0 ± 40mmH2O, the maximum does not exceed 0 ± 80mmH2O, the normal water pressure of 5.5MPa, to allow the fluctuation range of 4.5-6.0MPa, normal pressure boiler feed water temperature should be 105 degrees Celsius. 3, steam flow is not larger than the normal water boiler feedwater flow reasons, the measuring device instrument to do so. 4, the steam flow rate is less than the abnormal overheating damage reasons of water flow, water wall damage, damage to the economizer, the boiler is full of water, measuring device instrument to do so. 5, points on the furnace process CCP washed three times water gauge, pressures of 0.05-0.1MPa, 1.0MPa, 2.8MPa. 6, it is determined whether the normal water table and put into operation to see if the water level fluctuates slightly exemplar. 7, the boiler water pressure test and the test is divided into P overpressure test of two, when the water pressure P test, the boosting speed of not more than 0.35MPa 0.5MPa down rate does not exceed per minute. To the boiler water blowdown 8, the pressure in the boiler shutdown boiler water temperature drops below 80 degrees Celsius. 9, the position of each ordinary pressure test is hydrophobic doors: a door opening, the second door is closed. 10, the boiler-burner with a swirling-type and DC type two. 11, elemental analysis of coal with a composition: C, H, O, N, S, moisture, ash. 12, the main component of the blast furnace gas is: CO.'S time, nitrogen gas, blast furnace gas pressure is lower than 1500Pa, the user must reduce the amount of gas. Fire stop its pressure 1000Pa, working pressure 4000-8000Pa, the upper limit for the dangerous pressure 10000Pa, the lower limit is 2000Pa. 13, the main component of the coke oven gas: CO, nitrogen gas, coke oven gas pressure is lower than 1500Pa, must reduce the amount of gas, which pressure is 500Pa fire stop, working pressure 5000-7000Pa, the upper limit is 8000 Pa pressure the risk, the lower limit is 1500Pa . 14, the high, the main features of coke oven gas is flammable, explosive, toxic. 15, proximate analysis of coal with a volatile content, fixed carbon, ash and moisture. 16, boiler water circulation loop fault has stagnated, cycling back down the tube vaporization, soft drinks stratification. 17, the pulverized coal burning furnace radiation heat from a heat source of flame, high temperature flue gas convection heat. 18, the pulverized coal ignition and quick combustion conditions are sufficiently high temperature furnace, a sufficient amount of air mixed well, pulverized coal and air. Enough burn time. 19, ignition of pulverized coal into the combustion stage, the combustion stage, burning ember stage. 20, boiler mechanical rolling bearing does not exceed a predetermined temperature 80 degrees Celsius, the slide bearing does not exceed 40 degrees Celsius. 21, with factors affecting the steam load boiler water, boiler water salinity, pressure change, the vapor space of the drum height. 22, the principle of the steam separator drum gravity separation, inertial separation, centrifugal separation, separation of the water film. 23, the first ignition of the pulverized coal volatiles, fixed carbon is the latest ignition, the combustion of carbon is the longest. 24, steam soluble salt contaminated steam quality reasons, mechanical carryover. 25, the normal operation of the boiler drum water level in the glass tube than the water level high 50MM, when the water level in the steam table overall door leak, the water level high water table, the total gate leakage when the water level is low. 26, a method for enhancing heat transfer with a heat transfer coefficient is increased, raising the average temperature difference between the heat transfer, the heat transfer area is increased. 27, into the boiler furnace wall refractory layer, three-layer insulating layer and the sealing layer. 28, light blue flame blast furnace gas, as a bright golden yellow flame co-firing light yellow flame, coal, coke oven gas when the combustion gas as a combustion time. 29, the boiler by the "pot" and "furnace" composition, "pan" refers to a soft drink system is mainly composed of the drum, the downcomer, the header, waterwall, economizer, superheater composition; "oven" refers to a combustion system, a furnace, a burner, an air preheater composition. Calorific value 3.27GJ 30,1 tons of steam.
Reducing the project covers an area large steam coal fired sthorizontal coal fire steam eam boiler and therefore a large high-pressure steam boiler pipe insulation manufacturers buried heating pipe does not require masonry huge trench, just insulation pipe buried underground people, thus greatly reducing the project area, reducing earthwork open dig about 50% or more, reducing the amount of civil masonry and concrete 90%. Gas boiler, pipe insulation and processed in parallel trenching site, linker site only, shorten the construction period can be greater than about 50%, thermokeeping pipe is widely used a liquid, a gas pipeline network, Chemical Engineering Oil pipe insulation, the vapor Hence largest chemical boiler, central heating network, air conditioning and ventilation ducts, municipal engineering. Buried pipe insulation is one kind of good insulation properties, plus safe, reliable, low construction cost of the prefabricated buried pipe insulation. Effective solution incubated urban centralized heating with a high temperature heat input thermokeeping tube, sliding and water lubrication problems exposed tube ends. Buried pipe insulation not only has the traditional trench laying of pipelines and overhead incomparable advanced technology, practical performance, but also has significant social and economic benefits, but also energy-saving heating of effective measures. Prefabricated buried pipe insulation technology using buried heating pipe, marking polyurethane insulation heating pipe technology development has entered a new starting point. Reporters noted that this year again Yajian steel production capacity of about 50 million tons, quit more than 150 million tons of coal production capacity. Even the industry is expected this year to production capacity will be extended to glass, construction accounted for a large reduction in the steam boiler electrolytic aluminum, cement and shipbuilding industries. High pressure steam boiler pipe insulation manufacturers of polyurethane buried insulating pipe evacuated provided.
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