阅读说明：本技术 一种焦炉炉头补充加热方法 (Coke oven burner supplementary heating method ) 是由 徐昶辉 王保林 王伟 李海波 刘杰 张福行 曹银平 方新胜 于 2020-05-29 设计创作，主要内容包括：一种焦炉炉头补充加热方法,其包括：1)焦炉各燃烧室供焦炉煤气的下喷管中靠近焦侧和机侧的各两根下喷管上分别设置一补充加热煤气管道,该补充加热管道的一端以30～60度角斜向连接于所述下喷管,另一端连接至焦炉煤气总管；近所述焦炉煤气总管一侧的补充加热煤气管道上依次设置加减考克阀、交换考克阀；所述交换考克阀的控制端连接焦炉MG混合煤气交换机上的交换拉条；所述连接补充加热煤气管道的下喷管上设第一控制阀；2)当补充加热管道开启时,关闭相应的连接该补充加热管道的下喷管上的第一控制阀。本发明方法使炉头补充加热能够长时间、大范围的使用,消除炉头补充加热在使用过程中存在的安全风险。(A method of supplemental heating of a coke oven head, comprising: 1) a supplementary heating gas pipeline is respectively arranged on each two lower spray pipes close to the coke side and the machine side in the lower spray pipes for supplying coke oven gas in each combustion chamber of the coke oven, one end of the supplementary heating pipeline is obliquely connected to the lower spray pipes at an angle of 30-60 degrees, and the other end of the supplementary heating pipeline is connected to a coke oven gas main pipe; a supplementary heating gas pipeline close to one side of the coke oven gas main pipe is sequentially provided with an add-subtract cock valve and an exchange cock valve; the control end of the exchange cock is connected with an exchange brace on a coke oven MG mixed gas exchanger; a first control valve is arranged on the lower spray pipe connected with the supplementary heating gas pipeline; 2) when the supplementary heating pipeline is opened, the first control valve on the corresponding lower spray pipe connected with the supplementary heating pipeline is closed. The method of the invention enables the furnace end supplementary heating to be used in a large range for a long time, and eliminates the safety risk of the furnace end supplementary heating in the using process.)

1. A coke oven head supplementary heating method is characterized by comprising the following steps:

1) a supplementary heating gas pipeline is respectively arranged on each two lower spray pipes close to the coke side and the machine side in the lower spray pipes for supplying coke oven gas in each combustion chamber of the coke oven, one end of the supplementary heating pipeline is obliquely connected to the lower spray pipes at an angle of 30-60 degrees, and the other end of the supplementary heating pipeline is connected to a coke oven gas main pipe; a supplementary heating gas pipeline close to one side of the coke oven gas main pipe is sequentially provided with an add-subtract cock valve and an exchange cock valve; the control end of the exchange cock is connected with an exchange brace on a coke oven MG mixed gas exchanger; a first control valve is arranged on the lower spray pipe connected with the supplementary heating gas pipeline;

2) when the supplementary heating pipeline is opened, the first control valve on the corresponding lower spray pipe connected with the supplementary heating pipeline is closed.

2. The coke oven head supplemental heating method of claim 1, wherein at least a first and a second head supplemental heating horizontal tubes are provided on the coke side and the machine side of the coke oven;

the coke side or machine side lower spray pipe of the combustion chamber is connected with the coke side or machine side lower spray pipe of the adjacent combustion chamber;

the coke side or machine side lower spray pipe of the combustion chamber is provided with a plurality of burner supplement heating pipelines, and the burner supplement heating pipelines arranged on the odd number lower spray pipe of the coke side or machine side lower spray pipe of the adjacent combustion chamber are connected with a second burner supplement heating horizontal pipe;

the first furnace end and the second furnace end are respectively connected to a coke oven gas main pipe through a connecting pipeline, and the connecting pipeline is sequentially provided with a plus-minus cock valve and an exchange cock valve; and a second control valve is arranged on a pipeline on one side of the supplementary heating gas pipeline connected with the lower spray pipe.

3. The coke oven head supplemental heating method of claim 1, wherein the first control valve is a manual valve.

4. The coke oven head supplemental heating method of claim 2, wherein said second control valve is a manual valve.

Technical Field

The invention relates to a coke oven technology, in particular to a coke oven head supplementary heating method.

Background

The furnace head of the coke oven has low furnace end temperature due to large surface heat dissipation, the influence of cold air in the coke pushing and door removing process and the influence of loose furnace body. The coke at the furnace head part can not be matured on time due to low furnace head temperature, when the furnace head temperature is reduced to below 1100 ℃, the temperature of the wall surface of the furnace head part of the carbonization chamber after coal charging is reduced to below the crystal form transformation point of silica bricks, thus gradually damaging the coke oven masonry, and particularly showing more outstanding performance under the conditions of long coking time, furnace stewing and the like.

In addition, the furnace end temperature is low enough to lead to the furnace head position coke maturity not enough, causes the coke quality to descend, pushes out the in-process at the coke, can produce a large amount of black cigarettes, influences the environment.

Disclosure of Invention

The invention aims to provide a coke oven head supplementary heating method, which can be used for a long time and in a large range, eliminates the quality problem of furnace head coke partial generation caused by low furnace head temperature and the environmental protection problem of smoke generation caused by the fact that the furnace head coke is not mature in the coke pushing process, and eliminates the safety risk in the using process of furnace head supplementary heating.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a method of supplemental heating of a coke oven head, comprising:

1) a supplementary heating gas pipeline is respectively arranged on each two lower spray pipes close to the coke side and the machine side in the lower spray pipes for supplying coke oven gas in each combustion chamber of the coke oven, one end of the supplementary heating pipeline is obliquely connected to the lower spray pipes at an angle of 30-60 degrees, and the other end of the supplementary heating pipeline is connected to a coke oven gas main pipe; a supplementary heating gas pipeline close to one side of the coke oven gas main pipe is sequentially provided with an add-subtract cock valve and an exchange cock valve; the control end of the exchange cock is connected with an exchange brace on a coke oven MG mixed gas exchanger; a first control valve is arranged on the lower spray pipe connected with the supplementary heating gas pipeline;

2) when the supplementary heating pipeline is opened, the first control valve on the corresponding lower spray pipe connected with the supplementary heating pipeline is closed.

Preferably, the coke side and the machine side of the coke oven are respectively provided with at least a first furnace end and a second furnace end which are filled with horizontal heating pipes;

the coke side or machine side lower spray pipe of the combustion chamber is connected with the coke side or machine side lower spray pipe of the adjacent combustion chamber;

the coke side or machine side lower spray pipe of the combustion chamber is provided with a plurality of burner supplement heating pipelines, and the burner supplement heating pipelines arranged on the odd number lower spray pipe of the coke side or machine side lower spray pipe of the adjacent combustion chamber are connected with a second burner supplement heating horizontal pipe;

the first furnace end and the second furnace end are respectively connected to a coke oven gas main pipe through a connecting pipeline, and the connecting pipeline is sequentially provided with a plus-minus cock valve and an exchange cock valve; and a second control valve is arranged on a pipeline on one side of the supplementary heating gas pipeline connected with the lower spray pipe.

Preferably, the first control valve is a manual valve.

Preferably, the second control valve is a manual valve.

The invention has the beneficial effects that:

the invention designs the coke oven head for supplementary heating, improves the temperature of the coke oven head and ensures the maturity of coke in a carbonization chamber positioned at the head part.

In addition, in the process of additionally heating the coke oven head, after the oven head is additionally heated and opened, the lower spray pipe has detonation, and the pipe wall of the lower spray pipe is painted with burning paste and falling traces. The detonation is caused because when the gas goes down from the ascending state, part of the gas is retained in the horizontal transverse pipe and does not rise to the combustion chamber of the coke oven in time, so that the detonation is caused, the lower spray pipe is burnt and damaged if the detonation is light, and the horizontal flue of the coke oven and the wall of the regenerator are damaged if the detonation is heavy. The following spray pipes and other equipment are completely burnt out, and the leakage of the gas can cause serious safety risks such as gas poisoning and the like.

The method of the invention installs control valves on two lower spray pipes close to the coke side and the machine side in the lower spray pipes for supplying coke oven gas in each combustion chamber of the coke oven, and closes the control valves when the furnace end is heated and opened, thus effectively cutting off air, fundamentally eliminating the potential safety hazard of furnace end heating and avoiding the conditions of detonation, combustion and the like in the process of using the furnace end heating.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Detailed Description

Referring to fig. 1, the coke oven head supplementary heating method of the present invention includes:

1) in the lower nozzles of the coke oven 100 for supplying coke oven gas in each combustion chamber 200(n, n +1), two lower nozzles 1, 1 ', 2' close to the coke side and the machine side 300 (taking the machine side 300 as an example, the same below) are respectively provided with a supplementary heating gas pipeline 3, 3 ', 4', one end of the supplementary heating pipeline 3, 3 ', 4' is obliquely connected with the lower nozzles 1, 1 ', 2' at an angle of 30-60 degrees, and the other end is connected with the coke oven gas main pipe 300; the supplementary heating gas pipelines 3, 3 ', 4 and 4' at one side close to the coke oven gas main pipe 400 are sequentially provided with a add-subtract cock valve F1 and an exchange cock valve F2; the control end of the exchange cock valve F2 is connected with an exchange brace on a coke oven MG mixed gas exchanger; the lower spray pipes 1, 1 ', 2 and 2' connected with the supplementary heating gas pipeline are provided with first control valves F3;

2) when the supplementary heating line is opened, the first control valve F3 on the corresponding lower nozzle connected to the supplementary heating line is closed.

Preferably, the coke side and the machine side 300 of the coke oven 100 are respectively provided with at least a first and a second furnace end charging horizontal heating pipes 5 and 6;

a furnace end supplementary heating pipeline 3 arranged on a odd lower spray pipe 1(33#) in a coke side or machine side 200 lower spray pipe of the No. combustion chamber n in the combustion chamber 200 and a furnace end supplementary heating pipeline 4 'arranged on an even lower spray pipe 2' (34#) in a coke side or machine side 200 lower spray pipe of an adjacent combustion chamber n +1 are connected to a first furnace end supplementary heating horizontal pipe 5;

a burner supplementary heating pipeline 3 ' arranged on the even lower spray pipe 1 ' (34#) in the coke side or machine side 200 lower spray pipe of the combustion chamber n in the combustion chamber 200 and a burner supplementary heating pipeline 4 ' arranged on the odd lower spray pipe 2(33#) in the coke side or machine side 200 lower spray pipe of the adjacent combustion chamber n +1 are connected to the second burner supplementary heating horizontal pipe 6;

the first and second furnace end coal gas charging transverse pipes 5 and 6 are respectively connected to a coke oven gas main pipe 400 through a connecting pipeline, and the connecting pipeline is sequentially provided with a plus-minus cock valve and an exchange cock valve; and a second control valve F4 is arranged on a pipeline on one side of the supplementary heating gas pipelines 3, 3 ', 4' connected with the lower spray pipe. The furnace end supplementary heating is opened according to the maturity condition of the carbonization chamber, and whether the furnace end supplementary heating of the combustion chamber is opened or not can be selected through the second control valve.

Preferably, the first control valve and the second control valve are manual valves.

By the method, the air sucked at the carbon removing port of the cock can be isolated from the coke oven gas exchange, the phenomenon of furnace end supplement heating and detonating is fundamentally eliminated, and potential safety hazards are avoided; and the maturity of furnace end coke is ensured due to the use of furnace end supplemental heating, and the environmental protection risk caused by furnace end coke deflection is eliminated.

With the increase of environmental protection pressure, various large steel mills require to eliminate on-site unorganized emission, so that the furnace end is indispensable for supplementary heating. The invention has strong practicability, small investment and large effect no matter from the aspects of environmental protection, coke quality and safety.