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Horizontal type chain grate heat medium heater capable of coupling side wall staging air and flue gas recirculation

A flue gas recirculation and chain grate technology, applied in lighting and heating equipment, heat storage heaters, fluid heaters, etc., can solve the problem of high exhaust heat medium furnace emissions, delay the combustion process, reduce the combustion temperature and Combustion intensity, the effect of solving excessive NOx emissions

Active Publication Date: 2015-07-22
江苏宇澄环境工程设备有限公司
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Problems solved by technology

[0004] The purpose of the present invention is in order to solve the coal-burning horizontal chain grate heat medium furnace NO x The problem of high emissions, and then provides a horizontal chain grate heat medium furnace coupled with side wall grading air and flue gas recirculation

Method used

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  • Horizontal type chain grate heat medium heater capable of coupling side wall staging air and flue gas recirculation
  • Horizontal type chain grate heat medium heater capable of coupling side wall staging air and flue gas recirculation

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the drawings.

[0016] Such as figure 1 Said, the horizontal chain grate heat medium furnace coupled with side wall classification air and flue gas recirculation of the present invention is composed of scraper feeder 1, combustion chamber 2, chain grate 3, horizontal furnace body 4, and tail The flue 5 is composed; the combustion chamber 2 is surrounded by a short front furnace arch 6, a low and large span rear furnace arch 7 and the chain grate 3; the horizontal furnace body 4 is located in the Above the combustion chamber 2, a large number of heat medium tube bundles 8 are arranged in the inner space, and are divided into a large space heat medium radiation heat exchange area and a small space heat medium convection heat exchange area in sequence along the flow direction of the flue gas; the tail flue 5 has successively A waste heat boiler 9 and an air preheater 10 are connected; a plurality of pri...

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Abstract

The invention discloses a horizontal type chain grate heat medium heater capable of coupling side wall staging air and smoke recirculation. The horizontal type chain grate heat medium heater is composed of a scraper coal feeder, a combustion chamber, a chain grate, a horizontal type heater body and a rear smoke channel. According to the horizontal type chain grate heat medium heater, staging air is distributed on the two side walls of the horizontal type chain grate heat medium heater, and meanwhile primary air is supplied in sections under the grate to build the staging combustion conditions in the heater; smoke is extracted from the position, between a waste heat boiler and an air preheater, of the rear smoke channel and fed into multiple primary chambers located on the front portion of the chain grate to organize smoke recycling. Accordingly, on one hand, the retention time of coal particles in the heater in a combustion state of being far away from the stoichiometric ratio is prolonged; on the other hand, in a coal seam combustion area, the oxygen concentration is diluted, the combustion temperature is lowered, the combustion intensity is weakened, therefore, the combustion process is delayed, and finally the low NOx combustion in the coal-fired horizontal type chain grate heat medium heater is achieved.

Description

Technical field [0001] The invention relates to a coal-fired thermal medium furnace, in particular to a horizontal chain grate thermal medium furnace coupled with side wall classification air and flue gas recirculation, and belongs to the technical field of industrial boiler combustion. Background technique [0002] The heat medium furnace is a kind of equipment that often uses the heat generated by the combustion of fuel to heat the organic heat carrier (ie, heat medium, also known as heat transfer oil). The heat medium is heated and transported to the heat-using equipment, and the heat is released and then returned through the circulating oil pump The heating in the heat medium furnace repeats this cycle to form a complete circulating heating system. Compared with traditional boilers that use steam to heat, thermal medium furnaces have the advantages of uniform heating, high temperature control accuracy and low operating pressure. Therefore, thermal medium furnaces are currentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H7/00F24H9/18F24H9/00
Inventor 凌忠钱况敏谭立武
Owner 江苏宇澄环境工程设备有限公司
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