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Smoke recirculator for boiler

A flue gas recirculation and recirculation technology, applied in the transportation of non-flammable liquid/gas, combustion method, indirect carbon dioxide emission reduction, etc. To achieve the effect of optimizing the structure of the flue system, improving the overall efficiency, improving the stability and safety

Inactive Publication Date: 2016-05-18
TAIJUNE BOILER IND KUSN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional flue gas recirculation devices require auxiliary equipment, the system is complex, the investment is large, and most of them are difficult to stabilize the oxygen concentration to a sufficiently small level

Method used

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  • Smoke recirculator for boiler

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Embodiment Construction

[0013] Below in conjunction with specific embodiment, content of the present invention is described in further detail:

[0014] refer to figure 1 , a flue gas recirculation device for boilers, including burner 1, fuel gas boiler 2, boiler rear flue 3, blower 4, air control valve 5, air preheater 6, air preheater rear flue Road 7, chimney 8, flue gas circulation control valve 9, recirculation fan 10, recirculation flue gas pipe 11, flue gas air mixing chamber 12 and air duct 13. The burner 1 is installed on the fuel gas boiler 2, the fuel gas boiler 2 is connected to the air preheater 6 through the boiler rear flue 3, one end of the air preheater rear flue 7 is connected to the air preheater 6, and the other end is connected to the chimney 8 connections, the air control valve 5 is set at the combustion-supporting cold air inlet of the flue gas recirculation air channel, which can control the volume of recirculated flue gas and the volume of mixed air, and the blower 4 is insta...

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Abstract

The invention relates to the technical field of boiler burning, in particular to a smoke recirculator for a boiler. According to a conventional smoke recirculator, auxiliary equipment is needed, a system is complicated, the investment is large, and it is quite difficult to stably lowering the oxygen concentration to the degree which is low enough in the true sense on most occasions. According to the smoke recirculator for the boiler, recirculating smoke and air are mixed, so that the burning temperature is decreased, the oxygen concentration is lowered, the smoke heat exchange coefficient is increased, and the overall efficiency of the boiler is improved; by arranging a smoke and air mixing chamber and optimizing the structure of a flue system, a complicated flue structure is simpler and more reasonable, and the stability and safety of the whole system are improved.

Description

technical field [0001] The invention relates to the technical field of boiler incineration, in particular to a flue gas recirculation device used on a boiler. Background technique [0002] In recent years, large and medium-sized cities in my country have gradually phased out small coal-fired boilers and stoves in urban areas, and replaced them with clean fuels such as oil, gas, and electricity, or central heating. At present, most of the flue gas recirculation devices used in China are to extract a part of the low-temperature flue gas before the air preheater of the boiler and send it directly into the furnace, or mix it with primary air or secondary air and send it into the furnace, which also reduces The oxygen concentration is reduced, thereby reducing the emission concentration of NOx. The flue gas with a lower temperature is extracted from the front of the air preheater, and the extracted flue gas is sent to the air-flue gas mixer through the recirculation fan, and then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/00F23L15/00F23L7/00
CPCF23J15/00F23L7/00F23L15/00Y02E20/34
Inventor 华刚李先艳傅俊杰
Owner TAIJUNE BOILER IND KUSN
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