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Gas waste heat recovery device for coal-fired boiler

A flue gas waste heat, coal-fired boiler technology, applied in feed water heaters, preheating, combustion methods, etc., can solve the problem of difficult cleaning and removal of ash deposits in the flue gas box, achieve good ash cleaning effect, and speed up the flow rate of flue gas. Effect

Inactive Publication Date: 2011-09-28
GUANGXI ZHIYUAN ENERGY SAVING & ENVIRONMENTAL PROTECTION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a waste heat recovery device for flue gas of coal-fired boilers, which can solve the problem that the dust in the flue gas box is difficult to clean and remove

Method used

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  • Gas waste heat recovery device for coal-fired boiler
  • Gas waste heat recovery device for coal-fired boiler
  • Gas waste heat recovery device for coal-fired boiler

Examples

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing example the present invention is described in further detail:

[0025] figure 1 The shown coal-fired boiler flue gas waste heat recovery device has a flue gas box 101, and a cooling box 105 is arranged on the flue gas box 101, and a cooling box 105 is arranged on the flue gas box 101, in which the passing flue gas is distributed. A plurality of heat exchange tubes 104 between the box 101 and the cooling box 105. The cooling box 105 is a cooling air box through which the cooling air passes. sheets, the outside of the flue gas box 101 and the cooling box 105 are covered with an insulating layer. The front end of the flue gas box 101 is connected with an intake pipe 102 for the intake of flue gas, and the rear end is connected with an outlet pipe 106 for the outlet of the flue gas. Sonic soot cleaner 107, the sonic soot cleaner 107 adopts a pneumatic sonic soot cleaner such as the Chinese patent "Sonic Soot Cleaner" (Patent ...

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Abstract

The invention discloses a gas waste heat recovery device for a coal-fired boiler. The recovery device comprises a gas box, a cooling box and a plurality of heat exchange pipes, wherein the cooling box is arranged on the gas box; the heat exchange pipes pass through a separation layer of the gas box and the cooling box; a sonic dust cleaner is arranged in the gas box; a plurality of gas flues which are separated by the separation layer are arranged in sections of the gas box, in which the heat exchange pipes are arranged; and an inlet of each gas flue is provided with a gas flue valve. Compared with the prior art, the gas waste heat recovery device for the coal-fired boiler has the advantage of solving the problem that accumulated dust of the gas box is difficult to clean and remove.

Description

technical field [0001] The invention relates to the technical field of heat exchange equipment manufacturing, in particular to equipment for recovering waste heat from boilers that use coal or biomass as fuel. Background technique [0002] The boiler flue gas outlet temperature of coal-fired and biomass-fired industrial boilers is 230-280 °C. In order to utilize this part of the waste heat of the flue gas, the traditional method is to equip the tail of the boiler flue gas outlet with an economizer and an air preheater to recover the flue gas. Gas waste heat is used to heat boiler feed water and combustion air. The traditional economizers are cast iron type and steel pipe type, and the traditional air preheater is steel pipe type. They all have the problem of corrosive ash accumulation in the low temperature inlet section. In order to reduce corrosive ash accumulation, small and medium industrial boilers pass The design value of exhaust gas temperature after the coal burner ...

Claims

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Application Information

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IPC IPC(8): F22D1/36F23J3/02F23J15/06
CPCY02E20/30
Inventor 钟德鸿黄家祺赵海勇罗慧王军吴纯媛陶涛
Owner GUANGXI ZHIYUAN ENERGY SAVING & ENVIRONMENTAL PROTECTION EQUIP
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