Four-corner tangential firing boiler and method for reducing furnace coking and outlet smoke temperature difference
A four-corner tangential and boiler technology, which is applied in the direction of combustion method, combustion air/fuel supply, combustion equipment, etc., to achieve the effects of reducing powder loss, reducing smoke temperature deviation, and maintaining rigidity
Pending Publication Date: 2019-03-19
江苏京成机械制造有限公司
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Problems solved by technology
[0004] In order to solve the technical problem of reducing the coking of the boiler furnace and weakening the deviation of the flue gas temperature at the outlet of the furnace, the present invention provides a four-corner tangential combustion boiler
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[0019] refer to figure 1 , figure 2 and image 3 , the four-corner tangential combustion boiler of the present invention includes a burner 1, and the burner 1 is respectively equipped with a horizontal thick-thin primary air nozzle 2 on the four corners of the same layer, and the inside of the horizontal thick-thin primary air nozzle 2 is spaced obliquely along the length direction A number of horizontal thick-thin deflectors 21 are provided. In this embodiment, the horizontal thick-thin deflectors 21 are guide vanes, and there are 4 pieces in total, which can make the primary air mixture graded to form two phases of thick and thin. According to the embodiment The coal-fired characteristics of the project, the density ratio is 6:4. A primary air nozzle 22 with a deflection angle α is provided at the end of the horizontal thick-thin primary air nozzle 2, and the deflection angle α of the primary air nozzle 22 is set to 3°-10°. In this embodiment, the deflection angle α is se...
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Abstract
The invention relates to the field of combustion boilers, and discloses a four-corner tangential firing boiler and a method for reducing furnace coking and outlet smoke temperature difference. The four-corner tangential firing boiler is characterized in that horizontal bias primary air nozzles are separately installed at four corners of the same layer of a burner, a plurality of horizontal bias guide plates are obliquely arranged at intervals in the length direction inside each horizontal bias primary air nozzle, primary air nozzles with deflection angles are separately arranged on the ends ofthe horizontal bias primary air nozzles, and offset peripheral air baffles are separately arranged on the peripheral sides of the primary air nozzles. More than one layer of burnt-out air nozzles which are arranged in reverse cutting with the injection direction of the primary air nozzles are further arranged at the four corners of the top of the burner correspondingly. According to the four-corner tangential firing boiler and the method for reducing furnace coking and outlet smoke temperature difference, the coking degree of the boiler furnace can be reduced, the outlet smoke temperature difference at the furnace outlet is weakened, and the safe operation and the thermal efficiency of the boiler are ensured.
Description
technical field [0001] The invention relates to a four-corner tangentially-circular combustion boiler, in particular to a four-corner tangential-circle combustion boiler and a method for reducing coking in a furnace chamber and temperature difference of outlet smoke. Background technique [0002] In the normal operation of the four-corner combustion boiler unit, the boiler furnace always produces more or less coking phenomenon, and coking is one of the main reasons that seriously affect the safety and economic operation of the boiler. Some power plants in my country have reduced boiler output by 10% to 20% and thermal efficiency by 1% to 2.5% due to severe coking. Coking is very harmful, how to effectively prevent coking has become a common concern of people. [0003] In addition, there is a common phenomenon of asymmetric distribution of smoke temperature and steam temperature in the area of the furnace outlet of the four-corner tangentially fired boiler. The deviation o...
Claims
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Login to View More IPC IPC(8): F23L1/00F23L9/00
CPCF23L1/00F23L9/00
Inventor 丁宇李维刘家宝
Owner 江苏京成机械制造有限公司