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Segmented heating and segmented exhaust gas circulation coke oven vertical flue structure

A technology of exhaust gas circulation and segmented heating, applied in the field of coke ovens, can solve the problem that it is difficult to continue to improve the effect of reducing nitrogen oxides, and achieve the effects of weakening the combustion intensity, reducing the amount of production, and reducing pollution

Pending Publication Date: 2021-06-25
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned disclosed technologies have a certain effect on improving the high-direction heating uniformity of the flue and reducing the formation of nitrogen oxides, and the above-mentioned disclosed technologies have achieved certain beneficial effects in practical applications by using alone or in combination, but Practice has shown that the effects of the above technologies have certain bottlenecks, and it is difficult to continue to improve the effect of reducing nitrogen oxides after reaching a certain level

Method used

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  • Segmented heating and segmented exhaust gas circulation coke oven vertical flue structure
  • Segmented heating and segmented exhaust gas circulation coke oven vertical flue structure
  • Segmented heating and segmented exhaust gas circulation coke oven vertical flue structure

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Embodiment 1

[0044] Such as image 3 , Figure 4 As shown, in the present embodiment, the gas ejected from the gas outlets of each section includes coal gas and air (combustion-supporting gas), and the gas is divided into three sections and enters double-connected fire passages, that is, from the chute outlet 3 and the second section of gas at the bottom of the combustion chamber. Outlet 5 and three-stage gas outlet 6 jet out.

[0045] In this embodiment, there are three sections of exhaust gas circulation holes, the bottom exhaust gas circulation holes 4 are correspondingly arranged on both sides of the ramp outlet 3, the second-stage exhaust gas circulation holes 8 are correspondingly arranged on both sides of the second-stage gas outlet 5, and are located in the second-stage gas outlet 5. Within the range of the injection force; the three-stage exhaust gas circulation hole 9 is correspondingly arranged on both sides of the three-stage gas outlet 6, and is located within the range of th...

Embodiment 2

[0048] Such as Figure 5 , Figure 6 As shown, in this embodiment, the air is divided into three sections and enters the double-connected vertical fire channel, that is, the air is ejected from the ramp outlet 3, the second-stage gas outlet 5 and the third-stage gas outlet 6 at the bottom of the combustion chamber. Gas is not segmented, but supplied by gas pipe bricks.

[0049] In this embodiment, there are three exhaust gas circulation holes, the bottom exhaust gas circulation hole 4 is correspondingly arranged on both sides of the ramp outlet 3, the second-stage exhaust gas circulation hole 8 is correspondingly arranged on the side of the second-stage gas outlet 5, and is located in the second-stage air outlet. Within the scope of the injection force; the three-stage exhaust gas circulation hole 9 is correspondingly arranged on the other side of the three-stage gas outlet 6, and is located within the range of the three-stage air injection force.

[0050] Each section of ga...

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Abstract

The invention relates to a segmented heating and segmented exhaust gas circulation coke oven vertical flue structure. A coke oven vertical flue is a duplex vertical flue, the tops of two vertical flues forming the duplex vertical flue are communicated through a crossing hole, and the two vertical flues are additionally communicated through an exhaust gas circulation hole. Multiple sections of gas outlets are formed in outer partition walls on the two sides of the duplex vertical flue and / or a middle partition wall between the two vertical flues in the height direction. A plurality of sections of waste gas circulating holes are formed in the middle partition wall in the height direction, and the bottom waste gas circulating hole is formed in the lowermost part. By arranging the multiple sections of waste gas circulating holes, the waste gas circulating amount is increased. The structure is simple, the implementation is easy, the mixing degree of combustible gas and combustion-supporting gas with circulating waste gas can be increased, the combustion intensity is weakened, and therefore the uniformity of height-direction heating of the coke oven is effectively improved, and the generation amount of nitric oxide is reduced.

Description

technical field [0001] The invention relates to the technical field of coke ovens, in particular to a coke oven vertical flue structure for segmental heating and segmental exhaust gas circulation. Background technique [0002] It has been nearly a hundred years since the coke oven technology developed to the chamber structure, and the regenerator, chute, combustion chamber and roof structure of the vertical coke oven have tended to be stable. The development of coke oven technology requires major technological innovation. [0003] In recent years, with the stricter national environmental protection policies and the enhancement of public environmental awareness, the control of nitrogen oxides, sulfides and other emissions in flue gas during the coking oven coking process in various countries has become increasingly strict. The emission of nitrogen oxides during furnace production shall not exceed 500mg / m 3 , while the emission standards for Class I areas are more stringent. ...

Claims

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Application Information

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IPC IPC(8): C10B29/00C10B21/10C10B21/18
CPCC10B21/10C10B21/18C10B29/00
Inventor 肖长志杨俊峰韩龙严国华牛聪郑彭
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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