1, reduced excess air ratio is reduced boiler flue gas dew point temperature, the main cryogenic preventing corrosion. When reduced from 1.15-1.2 to 1.01-1.02, the dew point temperature of flue gas can be reduced 50-60 ℃. Excess air as possible to reduce the proportion of fuel combusted in a reasonable amount of air, the minimization of SO3.
Ignition is the primary determinant of the gas boiler started to master boiler ignition precautions to ensure the safe and stable operation of the boiler.
1, for gas-fired boilers, the ignition time if not successful, the need to purge the furnace flue, before a second firing.
2, in order to prevent a gas explosion, gas boilers not only to purge the boiler furnace and flue gas channel before the start, the need for a purge gas supply pipes. Medium on the gas supply duct is generally purged with an inert gas (such as nitrogen, carbon dioxide, etc.)
After cleaning gas steam industry boiler manufacture for heating common method of gas-steam oven after prolonged usage will junction green coke, steam oven cleaning gas is steam oven for coking gas during use, problems of carbon deposition. It is a good solution to gas-steam oven cleaning affect the production of contradiction, and routine cleaning technology can produce a lot of wastewater problems. Here we look at the specific bar 1, Delayed Coking cleaning: after adding the diluted cleaning agent to the gas steam boiler system, fill the water level to the high slot 1/2. In addition to the amount of coke cleaning agent is added: 10-20%, determined according to the specific amount of scale thickness. Temperature: 90-95 deg.] C, time: 12-72 hours, can be determined according to the scale thickness. 2, the rinsing cleaning: steam oven gas cleaning system clean the rear end of the residual liquid, rinse added 2 times, until no foam cleaning agent in addition to the coke, water clarity is good. Temperature: 85-95 ℃, Time: 5-8 hours. 3, Chit steps of: cleaning the furnace gas and steam at the end of the gauge is connected or can be connected to other places air compressor, compressed air system to boost 0.3-0.4Mpa, in the low and vented, and so forth, until the water Chuijin so far.
In mid-April, Hohhot, Inner Mongolia issued a notice (hereinafter referred to as the "Program"), "Hohhot tackling air pollution control plan" (2018-2020), the "plan" to win tough fight pollution prevention, to promote air pollution control, as the city to create a pleasant living environment for the development of the measures.
For air pollution control, "plan" set goals. As of 2020, Hohhot air quality more than two days ratio reached 83.8%, fine particles (of PM2.5) concentration of 35 micrograms / cubic meter. Wherein, 2018 Hohhot air quality objectives: good percentage of days to reach 79.5%, fine particles (of PM2.5) concentration of 39.2 micrograms / cubic meter.
Since 2017 to enter the heating season, Hohhot is the air quality continues to improve, has introduced the autumn and winter air pollution in Hohhot comprehensive reform program "," Hohhot 2017--2018 autumn and winter special inspection of comprehensive air pollution control program of work of law enforcement. " "Hohhot 2017--2018 autumn and winter air pollution in the comprehensive management of supervision and inspection plan", "Hohhot environmental Protection Agency checks on the issuance of the work program of the winter heating enterprises notification", "Hohhot City people's government on the issuance of residential heating clean alternative , "and other series of notifications. Key measures to coal-fired boilers for heating and bulk coal governance.
Second, the city's coal-fired boiler coal yard, residue field to achieve full closure transformation; more than 20 tons of steam / h coal-fired boilers have been installed pollution-line monitoring equipment, and networking with the Municipal Environmental Protection Bureau, established a 24-hour monitoring system.
Through the above measures, Hohhot air quality improved significantly compared to the same period. January 1, 2018 --3 17, good days Hohhot total 66 days, an increase of 4 days last year. Sulfur dioxide concentrations decreased 40.7% over last year, PM2.5 concentration decreased by 20% over the same period last year.
According to (2018-2020) spiritual requirements "Hohhot tackling air pollution control plan", 2018, the Board will eliminate 35 tons of steam utility / h coal-fired boiler room 11 - 15, involves heating an area of 3.872 million square meters. Currently the demolition and integration of clean energy and the transformation is complete, out of the task have been put in place, we have been completed out of eight coal-fired boilers and boiler room of the grid work, removal of nine coal-fired boilers (grid yet dismantled three, to electricity yet dismantled three), and has been able to "break two three clear", the remaining boilers will be completed by the end eliminated.
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