A horizontal chain grate heat medium furnace coupled with side wall grading air and flue gas recirculation

A flue gas recirculation, chain grate technology, applied in lighting and heating equipment, heat storage heaters, fluid heaters, etc. Combustion intensity, the effect of solving excessive NOx emissions

Active Publication Date: 2018-05-01
江苏宇澄环境工程设备有限公司
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  • Abstract
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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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  • A horizontal chain grate heat medium furnace coupled with side wall grading air and flue gas recirculation
  • A horizontal chain grate heat medium furnace coupled with side wall grading air and flue gas recirculation

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Embodiment Construction

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

[0016] like figure 1 As mentioned above, the horizontal chain grate heat medium furnace of the present invention, which is coupled with side wall grading air and flue gas recirculation, is composed of scraper coal feeder 1, combustion chamber 2, chain grate 3, horizontal furnace body 4 and tail section. 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 sequentially divided into a large space heat medium radiation heat exchange area and a small space heat medium convection heat exchange area along the flow direction of the flue gas; the tail flue 5 is successively The waste heat boiler 9 and the ai...

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Abstract

The invention discloses a horizontal chain grate heat medium furnace coupled with side wall grading air and flue gas recirculation. The horizontal chain grate heat medium furnace is composed of a scraper coal feeder, a combustion chamber, a chain grate, a horizontal furnace body and a tail flue. The invention relies on: while arranging the graded air on the two side walls of the horizontal chain grate heat medium furnace, the primary air is fed in sections under the grate to construct the graded combustion conditions in the furnace; from the tail flue between the waste heat boiler The flue gas is extracted from the position between the air preheater and sent to several primary air chambers at the front of the chain grate, which is used to organize the recirculation of the flue gas. As a result, on the one hand, the residence time of coal particles in the furnace away from the stoichiometric combustion state is prolonged; on the other hand, the oxygen concentration in the coal seam combustion zone is diluted, the combustion temperature is reduced, and the combustion intensity is weakened, thereby delaying the combustion process. Finally, low NOx combustion is realized in the coal-fired horizontal chain grate heat medium furnace.

Description

technical field [0001] The invention relates to a coal-fired heat-medium furnace, in particular to a horizontal chain grate heat-medium furnace coupled with side wall grading air and flue gas recirculation, and belongs to the technical field of industrial boiler combustion. Background technique [0002] Heat medium furnace is a kind of equipment that often uses the heat generated by fuel combustion to heat organic heat carrier (that is, heat medium, also known as heat transfer oil). Heating in the heat medium furnace, and so on, form a complete circulating heating system. Compared with the traditional boiler heating with steam, the heating medium furnace has the advantages of uniform heating, high temperature control accuracy and low operating pressure. Therefore, the heating medium furnace is currently widely used in industries such as printing and dyeing, chemical fiber, packaging, food and building materials. . [0003] Based on the primary energy conditions of “rich co...

Claims

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Application Information

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Patent Type & Authority Patents(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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