Ordinary gas wns diesel fired boiler flue gas temperature is generally 160-200 deg.] C, the heat loss in the boiler flue gas heat loss mainly in high temperature, about 10%, less than 2% as well as radiative heat loss from the furnace, so that a good insulation effect gas boiler thermal efficiency of around 90%. Condensed steam boiler full advantage of the latent heat of the exhaust gas temperature is reduced to 35-50 deg.] C, only 1% of the flue gas heat losses, radiative heat loss from the furnace was 0.6%, the flue gas is not recovered latent heat of 0.5%, the thermal efficiency of the boiler 108.9%.
Since the beginning of 2017, Qingdao City, Shandong Province to carry out the transformation of governance coal-fired wns diesel fired boiler, as of today, has a total payment of coal-fired boiler exhaust gas treatment and transformation subsidies of 240 million yuan in 2014 to 2016 for the sum of the total grant funds, the city this year We will continue to invest 350 million yuan for the renovation subsidy ultra-low emission coal-fired boilers.
Statistics show that January-October 2017, Qingdao City, "blue sky, starry" increased by 16 days the number of days year on year, totaling 289 days, accounting for more than 95% of the total number of days throughout the year, fine particulate matter (PM2.5), respirable The average concentration of particulate matter (PM10) reached 35 micrograms / cubic meter, 70 micrograms / cubic meter, an improvement of 16.7%, 14.6%, the highest in the province for the past five years, the highest level in the same period, the air quality in the first half to get the provincial government incentive funds 16.77 million yuan.
2014-2016, municipal finance coal-fired boilers and efficient treatment and transformation project grants 230 million yuan, began to be 100,000 yuan subsidy per ton of steam coal-fired boiler exhaust governance 2016 (Note: in 2016 began to carry out boiler subsidies, continues to the present is still the case).
Chemical Plant Boiler Water Wall High Temperature Corrosion What types of chemical plant wns diesel fired boiler water wall high temperature corrosion types are there? Chemical plant boiler water wall appeared high temperature corrosion phenomenon is a complex physical and chemical processes, analyze the mechanism of corrosion can be divided into sulfate type corrosion, corrosion in chloride and sulfide corrosion three types. 1, the sulfate corrosion occurs mainly due to corrosion is sulfate type like corrosion in the boiler water wall portions of the raw coal combustion to generate a basic substance pyrosulfate and sulfate compounds such as by a chemical reaction, the corrosion process usually have junction slag or the like coking phenomenon. 2, chloride-type corrosion in recent years, many scholars have conducted research, and have achieved fruitful research results. The results showed that when the high chloride content of the fuel, will produce a certain amount of hydrogen chloride in the boiler, and the boiler corrosive effect [3-5]. Coal boiler test results show that the chemical, the chloride content is less than 2/10000, the production of coal combustion is much smaller than the chloride content of chloride corrosion is generated, therefore, not because water wall temperature corrosion caused by chlorine contained in coal of. 3, sulfide corrosion combustion zone in the furnace within the range, when the unburned flame to the water wall erosion due to chemical action, unburned fuel will consume large amounts of oxygen, so that the outer surface of the waterwall vulcanized occurrence corrosion.
Gas-fired wns diesel fired boiler medium test and cold cycle (1) the heat carrier used in the organic heat carrier furnace must be qualified and the operating temperature must be consistent with the heating conditions. The outlet temperature of boiler is at least 30 ℃ lower than that of heat carrier and 40 ℃ lower than that of heat carrier, otherwise it will decompose and fail in advance. (2) Oil loading: the injection pump of the qualified heat carrier for testing shall be injected into the boiler and, when the oil injection pump is injected into the system, the valves of all heating systems in the furnace body shall be re-checked and the sewage valve shall be opened one by one to remove the air until the oil flow is closed, Stop oil injection and start circulating pump when high expansion tank level meter appears. Cold oil circulation. (3) Cold oil cycle: the purpose of the cold oil cycle is to test whether there is resistance in the whole heating system and whether there is leakage in the valve of the equipment. Each pump must be wheeled to start cold oil circulating in the system for no less than 6 hours. (4) cleaning filter: some metal and impurity deposits in the system in the cold oil cycle are shut down with the cold oil in front of the oil pump, and the filter is thoroughly cleaned after the cold cycle is finished. When the organic heat carrier is used, the outlet temperature of the carrier is lower than the maximum operating temperature of 20 ℃ and 40 ℃ provided by the manufacture, and the adjustment index is the main one. Close to the outlet temperature, when the temperature difference between the inlet and outlet decreases, the combustion should be reduced accordingly. Combustion should be intensified when the return temperature is reduced. Never blindly raise the outlet temperature to increase the heat supply. When the outlet temperature overheating instrument alarm, the furnace should be shut down in time to clean.Free Chat
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