Jiamusi City, Heilongjiang Province Tangyuan county government to further implement the "Heilongjiang Provincial People's Government of Heilongjiang Province on the issuance of three-year action plan to win the notice of blue sky Wars," the actual situation, carry out a comprehensive rectification for small coal-fired cfb boiler 1 drums, as follows .
First, the objectives
By the end of 2019 out of the region to build 26 units per hour and 10 tons of steam coal-fired boilers and furnaces tea, operating a stove, food equipment and other coal-fired kiln drying facilities. Out of which 14 coal-fired heating boilers Small units, service three coal-fired boilers, industrial production of small coal-fired boilers nine. By the end of 2020, the region will build small coal-fired boilers cleared number, and completed more than 10 tons of steam per hour of coal-fired small boilers governance standards.
Second, the specific content of execution
1, source control. County-level cities built in the region 35 tons of steam per hour ban on new coal-fired boilers, the rest of 10 tons of steam per hour ban on new coal-fired boilers and below.
2, find out the base. Focus on carefully checking the area of coal-fired boilers case, before the end of May, the completion of the area and the development of coal-fired boilers ledger built-up area, and clearly out of all kinds of coal-fired boilers responsible departments and completion time.
3, held a mobilization meeting. 10 tons of steam per hour, organization and small coal-fired boiler unit, responsible departments held a meeting to clear out of time limits, and invite gas companies, boiler manufacturers, heating companies and small boiler unit for docking, to help provide alternative solutions Program.
4, announced the phase-out plan. Through government websites, issued to small coal-fired boiler unit a variety of ways such as notification, publish small coal-fired boilers out of the list, time frame for completion and telephone hotlines.
5, to carry out law enforcement inspection. Organization of joint law enforcement inspection, supervision of small coal-fired boiler unit to carry out the planned phase-out time frame. Carried out errant time, press the "Heilongjiang Province Air Pollution Prevention Act," the imposition of penalties.
By the flue gas is added to the combustion products within the combustion zone, not only lowers the combustion temperature, NOx formation is reduced; simultaneously added to the flue gas reduces the oxygen partial pressure, which will reduce oxygen and nitrogen generating process of thermal NOx, whereby reduce the formation of NOx. Depending on the application of the principles, applied in two ways flue gas recirculation, and internal recirculation of flue gas are recirculated to the external smoke. For external flue gas recirculation techniques, the flue gas from the outlet of the cfb boiler 1 drum via an external conduit, re-added to the furnace. According to the study, external flue gas recirculation can be reduced to 70% of NOx formation. The ratio of the outer loop NOx control effect has a greater impact, as the outer loop increases the proportion of NOx reduction rates are more obvious, but the electrical energy consumption for circulating air will also increase.
The efficiency of the horizontal chain grate boiler is higher: The spiral gas tube is placed inside the boiler, so there will be no cool air enter. This can reduce heat loss and the working rate of this boiler is highest.Horizontal chain grate boiler heating fast: There many spiral gas tubes in the boiler and almost half of the boiler shell can be heated, so the temperature can up soon and the time was shorter than the water-tube boilers.
Design features gas cfb boiler 1 drum room Gas boiler room design requires more, many can be, but the design of the gas boiler room boiler room should be noted that according to the general design of the following steps: 1, boiler room should guard against water. 2, boiler room floor should be smooth and no steps. 3, is provided in the boiler room and equipment arrangement should be easy to manipulate, and testing patency. 4, boiler room should be well lit and well ventilated and cool and freeze the tools you need. 5, the boiler room and other load-bearing beam member and the gas boiler shall certainly interval or other device receiving it, to prevent heat damage. 6, manipulate and where the water table, pressure gauges, thermometers, flow meters, etc. in the boiler room, there should be adequate lighting. Boiler room should have a spare set of lighting equipment. 7, leading to the boiler room outside the doors should open outwards, banning locked or bolted in gas boiler run time. Boiler room door room or living room something of the boiler room should be open. Port and channel revenue boiler room should flow unimpeded.
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