Environment-friendly flue gas circulation layer-burning boiler and treatment method thereof

A treatment method and boiler technology, applied in the direction of combustion method, combustion equipment, fuel supply, etc., can solve problems such as difficulty in popularization, achieve the effect of reducing heat loss and improving fuel burnout rate

Inactive Publication Date: 2019-03-29
YANKUANG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses biomass gas as the reburning fuel, which can only meet the denitrification of flue gas from small-scale coal-fired boilers, and is difficult to popularize in large-scale production

Method used

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  • Environment-friendly flue gas circulation layer-burning boiler and treatment method thereof
  • Environment-friendly flue gas circulation layer-burning boiler and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment part provides a kind of layer fired boiler, such as figure 1 As shown, the furnace body of the layer-fired boiler includes a first cavity and a second cavity connected at the bottom; the top and / or side of the first cavity is provided with a coal filling port 1, and the first cavity The inside is a pyrolysis preheating zone; the inside of the second cavity is provided with a folded line partition 2, and the folded line partition 2 is connected to the first part of the connection between the first cavity and the second cavity. The outer wall of the cavity is connected, the side of the partition close to the first cavity is the pyrolysis gasification zone, and the other side is the semi-coke combustion zone; the top of the second cavity is provided with a steam drum 3, and the bottom of the steam drum is in the second cavity A rear arch 4 is provided on the furnace wall of the body, and a burn-out tuyere 5 is provided in the space between the rear arch 4 a...

Embodiment 2

[0068] This embodiment part provides a kind of layer fired boiler, such as figure 2 As described above, the furnace body of the layer-fired boiler includes a first cavity and a second cavity connected at the bottom; the top and / or side of the first cavity is provided with a coal filling port 1, and the interior of the first cavity is In the pyrolysis preheating zone, the side of the furnace wall away from the side of the steam drum in the first cavity is inclined; a linear partition 2 is arranged inside the second cavity, and the linear partition 2 is connected to the first The cavity is connected to the inner wall of the second cavity at the connection part of the second cavity, the side of the partition near the first cavity is a pyrolysis gasification zone, and the other side is a semi-coke combustion zone; the second cavity A steam drum 3 is arranged on the top of the body, and a rear arch 4 is arranged on the furnace wall of the second cavity below the steam drum. Outle...

Embodiment 3

[0077] This embodiment partly provides a layer-fired boiler, the furnace body of the layer-fired boiler is divided into a first cavity and a second cavity by a partition plate; the top of the first cavity is provided with a coal filling port 1 , the inside of the first cavity is a pyrolysis preheating zone; the inside of the second cavity is provided with a broken-line partition 2, and the broken-line partition 2 is connected to the bottom of the regional partition plate, and the partition The side of the plate close to the first chamber is the pyrolysis gasification area, and the other side is the semi-coke combustion area; the top of the second chamber is provided with a steam drum 3, and the bottom of the steam drum is provided with a rear wall on the furnace wall of the second chamber. Arch 4, the space between the rear arch 4 and the connection between the first cavity and the second cavity is provided with an overfire tuyere 5;

[0078] The lower part of the first cavity...

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Abstract

The invention provides an environment-friendly flue gas circulation layer-burning boiler and a treatment method thereof. A boiler body of the layer-burning boiler internally comprises a first cavity and a second cavity, wherein the bottom of the first cavity communicates with the bottom of the second cavity. Coal adding openings/a coal adding opening are/is formed in the top and/or the side of thefirst cavity, a partition is arranged in the second cavity, and the partition is connected with the connecting portion of the first cavity and the second cavity. A steam pocket is arranged on the topof the second cavity, a rear arch is arranged on the portion, below the steam pocket, of the boiler wall of the second cavity, and burn-off tuyeres are formed in the end, close to the first cavity, of the rear arch. A first chain grate stoker is arranged on the lower portions of the first cavity and the second cavity. At least two air chambers are formed below the first chain grate stoker. A gasconveying device is arranged outside the layer-burning boiler. Pipelines in the gas conveying device are connected with a pyrolysis and gasification region and a semi-coke burning region. By means ofthe layer-burning boiler, emission of NOx, Co and other multiple pollutants can be effectively reduced, and the burn-off rate of dyestuff is increased.

Description

technical field [0001] The invention belongs to the field of coal combustion equipment, and relates to a layer-fired boiler and a treatment method thereof, in particular to an environment-friendly flue gas circulation layer-fired boiler and a treatment method thereof. Background technique [0002] The flue gas recirculation technology currently used in coal-fired boilers is to send part of the low-temperature flue gas directly or mixed with air and then send it into the furnace to participate in auxiliary combustion and flow field integration, increase the content of inert gas in the furnace and reduce the combustion temperature, and the combustion speed also increases. The reduction, to achieve the suppression of NO x generated purpose. Experimental studies have proved that this technical method is suitable for gas-fired boilers with less N content, and most of them are fuel-type NO x coal-fired boilers, the effect is not obvious. At the same time, in small and medium-si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B80/02F23J1/02F23K1/04
CPCF23B80/02F23J1/02F23K1/04
Inventor 王海苗宋令坡谭波苗因德杨晓辉司硕王传志
Owner YANKUANG GRP CO LTD
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