Circulating structure and method for exhaust gas of coke oven

A technology of exhaust gas circulation and coke oven, which is applied in the direction of coke oven, coke oven heating, combustible gas heating coke oven, etc. Control and reduce waste gas and other problems to achieve the effect of improving work efficiency and safety, shortening construction period and reducing investment cost

CN105385460AInactive Publication Date: 2016-03-09ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-03-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a circulating structure and method for exhaust gas of a coke oven. The circulating structure comprises a main exhaust gas pipe, a connecting pipe, an automatic flow controller, a basement horizontally-arranged pipe, a lower jet pipe and brick exhaust gas channels which are successively connected, wherein the main exhaust gas pipe is connected with an exhaust gas source via an external variable-frequency fan, the basement horizontally-arranged pipe is horizontally arranged along the coke oven, the upper part of the basement horizontally-arranged pipe is provided with the lower jet pipe which is connected with the brick exhaust gas channels built in the wall of each heat storage chamber, and brick exhaust gas channel outlets located at the top of the brick exhaust gas channels are arranged in a vertical flue of a combustion chamber. The circulating structure and method are applied to a compound heating coke oven using lean gas for heating and can increase the circulation volume of exhaust gas, reduce the discharging amount of NOX in coke oven flue gas and improve uniformity of high heating of the vertical flue; and the circulating structure is simple in structure and convenient and accurate to adjust, can be in automatic control, and is beneficial for improving an operation environment, mitigating labor intensity and improving work efficiency and security.
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Description

technical field

[0001] The invention relates to the technical field of coke oven exhaust gas circulation, in particular to a coke oven exhaust gas circulation structure and method. Background technique

[0002] At present, the working principle of the exhaust gas circulation adopted by the coke oven is to suck the exhaust gas of the downdraft from the circulation hole into the updraft fire channel under the action of the jet force of the updraft, so as to reduce the concentration of combustible components and oxygen in the air, and increase the airflow velocity , lengthen the flame, which is conducive to the uniform maturation of coke cakes up and down, and improves the quality of coke. This method is also a common method used by many coking design units to improve the uniformity of heating in the high direction of the coke oven. However, in the existing exhaust gas circulation structure, the exhaust gas circulation volume cannot be precisely controlled, and depends on the ...

Examples

Embodiment Construction

[0027] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0028] See Figure 3-Figure 4 , is a structural schematic diagram of the coke oven exhaust gas circulation structure of the present invention. A coke oven waste gas circulation structure according to the present invention includes a waste gas main pipe 1, a connecting pipe 2, an automatic flow controller 3, a basement horizontal pipe 4, a lower nozzle pipe 5 and a brick waste gas channel 6 connected in sequence, and the waste gas main pipe 1. Connect the waste gas source through an external frequency conversion fan. The basement horizontal pipe 4 is arranged horizontally along the coke oven. The brick exhaust flue outlet 7 on the top is located in the vertical fire path 9 of the combustion chamber.

[0029] The outlet 7 of the brick waste gas channel is round or square in shape, and the opening form is full opening or half opening.

[0030] A w...