To enhance the thermal efficiency gas boilers What environmental policy: the combustion efficiency of combustion represents the degree of complete combustion. To improve the combustion efficiency of gas boilers and environmental protection, we must try to adjust the combustion conditions and better organization of the furnace, fuel combustion, reducing q3 and q4. Gas boiler environmental protection reduce exhaust gas temperature: at present China's industrial boiler flue gas temperature is high, is one of the main reasons of the low gas boiler thermal efficiency and environmental protection. Each small boiler flue gas temperature decreased 15-20 ° C, 15 ° C decreased every large boiler, a 1% increase in the thermal efficiency of the boiler gas. Accordingly, to try to reduce exhaust gas temperature flue gas heat recovery, reducing heat losses q2, the fuel savings. Softened water supply and condensate recovery: boiler feed water softening treatment and condensate recovery measures is to improve the thermal efficiency of the boiler. Raw water contains various impurities and fouling material, if not the water treatment boiler fouling. Low thermal conductivity of the scale, so that once the heating surface fouling due to increased thermal resistance, gas boiler output decreased to increase coal consumption, reducing the thermal efficiency of the boiler. Boiler keeps running at rated load: When natural gas boiler overload, due to the amount of fuel to be increased, the coal seam thickened, grate speed, air volume must be increased to meet the increased load required. Thick coal seam and grate faster incomplete combustion of the solid increase in losses due to increased air volume, the short residence time in the furnace flue gas, some burning of combustible gas has not finished on the drain with the flue gas, so incomplete combustion gas heat loss is increased. Meanwhile, when the overload operation, since the furnace temperature is increased thickening seam, exhaust gas temperature increase accordingly, so that heat loss is increased. Boiler low load operation, the amount of reducing gas, the furnace temperature is lowered, deterioration of the combustion conditions, incomplete combustion loss q3, q4 is also increased. When the boiler load is only 50%, due to a significant reduction in temperature in the furnace, it is difficult to maintain stable combustion furnace. Low load operation relatively increased heat loss, the overload or low-load operation the boiler will result in reduced thermal efficiency of the boiler. Strengthen the insulation, sealing, anti-leakage, anti-risk: Due to the wall gas boiler, soda temperature heat pipe system is better than the boiler room air temperature is high, so that part of the heat pipe system and soda furnace wall to radiation and convection to the loss of ambient air, heat radiation loss becomes the boiler. Only the furnace heat of the heat loss, reduces the temperature of the furnace at the same time, it affects the combustion. Therefore, the use of advanced insulation materials to strengthen the walls and heat insulation boiler pipes, reducing heat loss and improve the thermal efficiency of gas boilers and environmental protection. Temperature and security issues to resolve gas steam boiler
The design of the boiler room fire interval is how much? Section 13.1.1 boiler fire hazard classification and fire rating should meet the following requirements: a room, boiler production plant belongs to class D, to the steam boiler rated evaporation 4t / h, when the hot water boiler room rated output is greater than 2.8MW, boiler room building fire resistance rating of not less than two; steam boiler equal to or less than the rated evaporation 4t / h, when the hot water boiler is equal to or less than the rated output 2.8MW, between the boiler building fire resistance rating of not less than three; II. when the inter-tank, and a pump room between the oil heater are class C production plant, its construction fire resistance rating of not less than two, disposed within said room between the auxiliary boiler room, a room should be set apart from other firewall; III. between the gas regulator production plant belonging to Group a, which is not less than two building fire rating, should be provided between the boiler room and the immediate neighborhood regulator firewall spaced boiler room, which doors open outwards and should not be passed directly the boiler room, the ground should not spark floor. Referring again to the provisions of Article 5.2.2 GB50016-2006 "architectural design code for fire protection," according to fire resistance rating.
Improve the thermal efficiency of gas steam boiler, to reduce the scale of the heating surface regardless prevention, gas steam boiler after a long run, it will produce some more or less scale. Gas steam boiler in operation, the furnace will be a series of chemical and physical reactions, in use, will form a hard and dense scale on the heating surface, which will directly result in reduced heat transfer efficiency of the boiler; and by corrosive effects of scale, will lead to reduced water wall furnace heat absorption gas steam boilers, which reduces thermal efficiency, waste input costs. The need to clean up the scale there is little that the boiler is to make long-term stable operation down. Scale thermal conductivity of only one percent of the steel, once the heating surface fouling, so that the heat transfer will be impeded, during use in order to maintain a constant output of the boiler, it is necessary to increase the temperature of the fire side. The outlet temperature of the furnace gas steam boiler is increased during the process, so that it will lose gas steam boiler is increased, so that effective heat transfer will reduce the equipment fouling in the water wall, so it is very likely It can cause water wall tube wall temperature increases lead to burst pipes water wall. Cleaning the boiler becomes particularly important. Performing the cleaning process, you can use efficient, environmentally friendly and non-corrosive cleaning agent, so that the device will be exposed to the original metallic tube, reduced to fouling. Secondly, after ignition gas steam boiler, flue gas temperature of the furnace needed to observe changes and the main steam temperature; when the main steam pressure is on the rise, if the boiler ignition, the smoke temperature rise speed or does not rise significantly Pianman, immediately check the oil on fire the gun.
To better implement the spirit of the CPC Central Committee nineteen Japanese National Assembly ecological and environmental protection, and resolutely respond Blue Sky Battle action, August 27, Qiqihar, Heilongjiang Province, the city government announced the "small coal-fired boilers Qiqihar City 2018-2020 to promote the phase-out plan" (the "program"), a more concrete of small coal-fired boilers on the basis of governance "Qiqihar City, 2018-2020 tough fight pollution prevention action plan" on.
"Plan" to improve air quality at the core, to take the most effective measures for key areas of work, the various departments collaborate together to complete the task of eliminating small coal-fired boilers.
"Plan" work plan is divided into three phases:
1, before the end of September 2018, in addition to the boiler must be retained, built-up areas in the central city and the rest of the county (city) to complete a full range of 10 steam tons / hour and coal-fired boiler or elimination process.
2, before the end of 2019, each county (city) out of more than 50% of the 10 steam tons / hour and coal-fired boilers.
3, before the end of 2020, in addition to the boiler must be retained, built-up areas outside the central city and the rest of the county (city) the scope eliminate or convert 10 tons of steam / hour and coal-fired boilers.
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