CN107880905B

CN107880905B - Novel vertical flue structure of coke oven combustion chamber

Info

Publication number: CN107880905B
Application number: CN201711351572.4A
Authority: CN
Inventors: 牛聪; 韩龙; 杨俊峰; 李振国; 严国华; 陈伟
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2017-12-15
Filing date: 2017-12-15
Publication date: 2020-03-27
Anticipated expiration: 2037-12-15
Also published as: CN107880905A

Abstract

The invention relates to a novel vertical flue structure of a combustion chamber of a coke oven, which comprises a vertical flue formed by enclosing oppositely arranged vertical flue partition walls and oppositely arranged carbonization chamber walls; a plurality of convex structures protruding into the vertical flue are uniformly arranged on the carbonization chamber walls on the two sides in the vertical flue along the height direction, and the convex structures on the carbonization chamber walls on the two sides are arranged at intervals to form a snake-shaped high-temperature gas channel of the vertical flue; the invention can change the airflow direction of the vertical flue of the combustion chamber, improve the thermal efficiency, improve the high-direction heating uniformity of the combustion chamber, and reduce the high-temperature ignition temperature, thereby reducing the content of nitrogen oxides in flue waste gas.

Description

Novel vertical flue structure of coke oven combustion chamber

Technical Field

The invention relates to the technical field of coking by a coke oven, in particular to a novel vertical flue structure of a combustion chamber of the coke oven.

Background

With the increasing development of the coking industry, more and more technicians begin to pay attention to the research on the aspects of saving energy, improving the environmental protection standard and the like; with the stricter and stricter restrictions on toxic nitrogen oxides in coking waste gas and the stricter standards for implementation, coking enterprises are faced with the inevitable choice of shutting down the production or modifying the production to reach the standard.

Research shows that nitrogen oxides in the coke oven exhaust gas mainly come from high-temperature reaction of nitrogen and oxygen in combustion-supporting gas air, namely, reaction type nitrogen oxides. The reaction type nitrogen oxides are sharply increased along with the increase of the reaction temperature and approximately show a logarithmic relationship, so that uniform heating is realized under the requirement of ensuring the maturity of coke, and the reduction of the combustion temperature of a combustion high-temperature point is an effective method for reducing the content of the nitrogen oxides. Meanwhile, the uniform heating temperature can also reduce energy consumption, avoid local overheating of coke products and improve the economic benefit of product quality.

Disclosure of Invention

The invention provides a novel vertical flue structure of a combustion chamber of a coke oven, which can change the airflow direction of the vertical flue of the combustion chamber, improve the thermal efficiency, improve the high-direction heating uniformity of the combustion chamber and reduce the high-temperature ignition temperature, thereby reducing the content of nitrogen oxides in flue waste gas.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel vertical flue structure of a combustion chamber of a coke oven comprises a vertical flue formed by enclosing oppositely arranged vertical flue partition walls and oppositely arranged carbonization chamber walls; a plurality of convex structures protruding into the vertical flue are uniformly arranged on the carbonization chamber walls on the two sides in the vertical flue along the height direction, and the convex structures on the carbonization chamber walls on the two sides are arranged at intervals to form a snake-shaped high-temperature gas channel of the vertical flue;

the snakelike vertical flue high-temperature gas channel can change the flowing state of high-temperature gas in the vertical flue, and local laminar flow is changed into turbulent flow, so that the heat transfer coefficient is increased, the heat transfer efficiency is improved, high-temperature points in the vertical flue are increased, the vertical flue high-direction heating uniformity is improved, and the uniform maturation of coke is facilitated; the temperature of the high temperature point of combustion is reduced on the premise of not changing the coking time, thereby reducing the content of nitrogen oxides in the waste gas.

The carbonization chamber wall is formed by a plurality of wall bricks which are built along the height direction, and the raised structure and the wall bricks with the corresponding height are integrated into a whole.

The length of the protruding structure protruding out of the wall of the carbonization chamber is 1/5-1/3 of the width of the vertical flame path in the corresponding direction.

Compared with the prior art, the invention has the beneficial effects that:

1) compared with the existing vertical flame path of the vertical unobstructed combustion chamber, the flow state of combustion gas in the vertical flame path can be changed, and the turbulent flow proportion of the flowing gas is greatly increased, so that the heat transfer efficiency of high-temperature gas is improved;

2) the local high temperature points in the vertical flame path are increased, so that the vertical heating uniformity of the vertical flame path is improved, and the uniform maturation of coke is facilitated;

3) the temperature of a combustion high-temperature point is reduced on the premise of not changing the coking time, so that the content of nitrogen oxides in waste gas is reduced, energy waste and environmental pollution are reduced, and the environmental protection pressure of a coking enterprise is relieved;

4) on the premise of not changing the coal gas supply, the temperature of the discharged waste gas can be reduced, the coking time is shortened, and the yield in unit time is improved.

Drawings

FIG. 1 is a schematic diagram of the novel vertical flue structure of the combustion chamber of the coke oven.

In the figure: 1. vertical flame path 2, carbonization chamber wall 3, wall brick 4, coke 5, protruding structure

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in figure 1, the novel vertical flue structure of the combustion chamber of the coke oven comprises a vertical flue 1 which is formed by enclosing oppositely arranged vertical flue partition walls and oppositely arranged carbonization chamber walls 2; a plurality of convex structures 5 protruding into the vertical flue 1 are uniformly arranged on the carbonization chamber walls 2 at two sides in the vertical flue 1 along the height direction, and the convex structures 5 on the carbonization chamber walls 2 at two sides are arranged at intervals to form a snake-shaped vertical flue high-temperature gas channel;

the snakelike vertical flue high-temperature gas channel can change the flowing state of high-temperature gas in the vertical flue 1, and local laminar flow is changed into turbulent flow, so that the heat transfer coefficient is increased, the heat transfer efficiency is improved, high-temperature points in the vertical flue 1 are increased, the height-direction heating uniformity of the vertical flue 1 is improved, and the uniform maturation of coke 4 is facilitated; the temperature of the high temperature point of combustion is reduced on the premise of not changing the coking time, thereby reducing the content of nitrogen oxides in the waste gas.

The carbonization chamber wall 2 is formed by a plurality of wall bricks 3 which are built along the height direction, and the convex structure 5 and the wall bricks 3 with the corresponding height are integrated into a whole.

The length of the protruding structure 5 protruding out of the carbonization chamber wall 2 is 1/5-1/3 of the width of the vertical flue 1 in the corresponding direction.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A vertical flue structure of a combustion chamber of a coke oven comprises a vertical flue formed by enclosing oppositely arranged vertical flue partition walls and oppositely arranged carbonization chamber walls; the vertical flue is characterized in that a plurality of convex structures protruding into the vertical flue are uniformly arranged on the carbonization chamber walls on two sides in the vertical flue along the height direction, and the convex structures on the carbonization chamber walls on the two sides are arranged at intervals to form a snake-shaped vertical flue high-temperature gas channel; the carbonization chamber wall is formed by a plurality of wall bricks which are built along the height direction, and the raised structure and the wall bricks with the corresponding height form an integral structure;

2. The vertical flue structure of the combustion chamber of the coke oven as claimed in claim 1, wherein the length of the raised structure protruding out of the wall of the coking chamber is 1/5-1/3 of the width of the vertical flue in the corresponding direction.