CN-224212608-U - Coke oven vertical flame path with low nitrogen oxide heat recovery

CN224212608UCN 224212608 UCN224212608 UCN 224212608UCN-224212608-U

Abstract

The utility model discloses a low nitrogen oxide heat recovery coke oven vertical flame path which comprises a carbonization chamber main wall, wherein a carbonization chamber is positioned between two adjacent carbonization chamber main walls, a chamber bottom horizontal flame path is arranged at the bottom of the carbonization chamber, a vertical flame path is arranged in the carbonization chamber main wall, a flame path air supply pipe is arranged in the vertical flame path along the height direction, and the air supply quantity on the flame path air supply pipe is sequentially increased from top to bottom. The vertical flame path comprises a descending flame path and an ascending flame path which are arranged in the main wall of the carbonization chamber, wherein the upper end of the descending flame path is communicated with the upper space of the carbonization chamber, the lower end of the descending flame path is led to the horizontal flame path at the bottom of the chamber, and the lower end of the ascending flame path is communicated with the horizontal flame path at the bottom of the chamber. The ratio of the chamber width B to the chamber height h of the carbonization chamber is 1 (2-4). The fire channel air supply holes are formed in the sections of the air supply holes of the vertical fire channel, and the number of the air supply holes of the fire channel on the sections of the air supply holes is increased from top to bottom in sequence. The heat recovery coke oven vertical channel can effectively inhibit the generation of nitrogen oxides in the coking process.

Inventors

LIU PENGCHENG
Qiao Mengke
XU GUANGPING
HE ZHONGJUN
MAO ZHONGJUN
LI XIANGCHENG

Assignees

江苏中磊节能科技发展有限公司

Dates

Publication Date: 20260508
Application Date: 20250529

Claims (8)

1. The low nitrogen oxide heat recovery coke oven vertical flame path comprises a main wall (2) of a carbonization chamber, wherein the carbonization chamber (1) is positioned between the main walls (2) of two adjacent carbonization chambers, and is characterized in that a horizontal flame path (7) at the bottom of the carbonization chamber (1) is arranged, a vertical flame path (3) is arranged in the main wall (2) of the carbonization chamber, a flame path air supply pipe (5) is arranged in the vertical flame path (3) along the height direction, and the air supply quantity on the flame path air supply pipe (5) increases gradually from top to bottom.
2. The low nitrogen oxide heat recovery coke oven vertical fire channel according to claim 1, wherein the vertical fire channel (3) comprises a descending fire channel and an ascending fire channel which are arranged in a main wall (2) of the carbonization chamber, the upper end of the descending fire channel is communicated with the upper space of the carbonization chamber (1), the lower end of the descending fire channel is communicated with a horizontal fire channel (7) at the bottom of the chamber, and the lower end of the ascending fire channel is communicated with the horizontal fire channel (7) at the bottom of the chamber.
3. The low nitrogen oxide heat recovery coke oven tunnel according to claim 1, characterized in that the ratio of the chamber width B to the chamber height h of the carbonization chamber (1) is 1 (2-4).
4. A low nitrogen oxide heat recovery coke oven vertical fire channel as claimed in claim 1, 2 or 3, wherein the sections of the air supply holes of the vertical fire channel (3) are provided with a plurality of fire channel air supply holes (8), and the number of the fire channel air supply holes (8) on each air supply hole section increases from top to bottom.
5. The low nitrogen oxide heat recovery coke oven vertical fire channel according to claim 4, wherein the vertical fire channel (3) is a square column tube, the fire channel air supply tube (5) comprises an arc tube wall, the arc tube wall and the inner wall surface of the vertical fire channel (3) enclose an air supply channel, and the fire channel air supply holes (8) arranged on the arc tube wall have different orientations.
6. The low nitrogen oxide heat recovery coke oven vertical fire channel according to claim 4, wherein the fire channel air supply pipe (5) comprises a straight pipe wall, the straight pipe wall and the inner wall surface of the vertical fire channel (3) form an air supply channel, and the straight pipe wall is provided with a fire channel air supply hole (8).
7. A low nitrogen oxide heat recovery coke oven vertical fire channel according to claim 1, 2 or 3, characterized in that the wall of the fire channel air supply pipe (5) is provided with an air supply transverse port (9) with gradually increasing width from top to bottom.
8. A low nitrogen oxide heat recovery coke oven vertical fire channel according to claim 1, 2 or 3 is characterized in that a vertical air supply port (10) is arranged on the pipe wall of the fire channel air supply pipe (5) along the height direction, and the vertical air supply port (10) is a vertical through port with narrow upper part and wide lower part.

Description

Coke oven vertical flame path with low nitrogen oxide heat recovery Technical Field The utility model relates to a clean heat recovery coke oven, in particular to an improvement of a vertical flame path structure comprising a descending flame path and an ascending flame path in the clean heat recovery coke oven. Background The clean heat recovery coke oven is a novel coke oven which reasonably and fully burns coke oven gas, chemical products and some harmful substances generated in the coking process in the coke oven, and recovers heat of high-temperature waste gas for power generation or other purposes. The clean heat recovery coke oven not only greatly reduces the environmental pollution hazard in the coking process, but also fully and comprehensively utilizes the waste heat resources. The clean heat recovery coke oven comprises a carbonization chamber and a combustion chamber, wherein the combustion chamber for providing coking heat mainly comprises an ascending flame path and a descending flame path which are arranged in a partition wall of the carbonization chamber. The existing heat recovery coke ovens all adopt wide coking chambers for coking, the coke has large block size, but the too wide coking chambers seriously affect the heat transfer effect in the middle part of the coking chambers, the coking time is too long, the occupied area is large, the investment cost is high, if the width of the coking chambers is narrowed, the height of the coking chambers and the length of vertical flame paths such as ascending flame paths and descending flame paths in the main walls of the coking chambers are necessarily increased, the occupied area of the coke ovens can be effectively reduced, the heat transfer effect is optimized, the length of the ascending flame paths and the length of the descending flame paths can lead to the following defects, firstly, the length of the vertical flame paths can directly affect the heat efficiency of the wall surfaces of the coking chambers, and the combustible raw gas and the combustion air content in the ascending flame paths and the descending flame paths form extreme non-uniformity, so that the difference is generated in the combustion of the raw gas in the ascending flame paths and the descending flame paths, the difference in the combustion condition leads to the difference in the quantity of heat generated, and the heating efficiency and the quality of the coke oven are further affected. In addition, under the condition of high-temperature combustion, the generation speed of the thermal nitrogen oxide is rapidly accelerated, and researches show that the generation amount of the nitrogen oxide is increased by 6-7 times when the temperature is increased by 100 degrees, and the existence of the local high-temperature area in the vertical flame channel becomes a main source of coke oven pollutants. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model aims to provide the low-nitrogen oxide heat recovery coke oven vertical fire channel which is small in occupied area and low in investment cost and can effectively inhibit the generation of nitrogen oxides in the coking process. In order to solve the technical problems, the low nitrogen oxide heat recovery coke oven vertical flame path comprises carbonization chamber main walls, wherein the carbonization chambers are positioned between two adjacent carbonization chamber main walls, the bottom of each carbonization chamber is provided with a horizontal flame path at the bottom, the vertical flame path is arranged in the carbonization chamber main walls, a flame path air supply pipe is arranged in the vertical flame path along the height direction, and the air supply quantity on the flame path air supply pipe is sequentially increased from top to bottom. Preferably, the vertical flame path comprises a descending flame path and an ascending flame path which are arranged in the main wall of the carbonization chamber, wherein the upper end of the descending flame path is communicated with the upper space of the carbonization chamber, the lower end of the descending flame path is led to the horizontal flame path at the bottom of the chamber, and the lower end of the ascending flame path is communicated with the horizontal flame path at the bottom of the chamber. Preferably, the ratio of the chamber width B to the chamber height h of the carbonization chamber is 1 (2-4). Further, a plurality of flame path air supply holes are formed in the sections of the plurality of air supply holes of the vertical flame path, and the number of the flame path air supply holes in the sections of the air supply holes is increased from top to bottom in sequence. Further, the vertical flame path is a square pillar pipe, the flame path air supply pipe comprises an arc pipe wall, the arc pipe wall and the inner wall surface of the vertical flame path enclose an air supply channel, and the flame path air supply hol