Four-corner tangential firing boiler and method for reducing furnace coking and outlet smoke temperature difference

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...

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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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