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Coke oven flue reinforcing and maintaining method

A coke oven flue and flue technology, which is applied in the heating of coke ovens, coke ovens, coke oven parts, etc., can solve problems such as flue burnout, economic loss, and atmospheric environmental pollution, and achieve the goal of improving maintenance efficiency Effect

Active Publication Date: 2018-12-28
山西沁新能源集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The lining of the flue has been operating in a high-temperature environment for a long time, and it needs to withstand the erosion of high-speed flue gas for a long time. In addition, because the coke oven is constantly adjusting the heating system with market changes, the refractory bricks in the lining are loose or fall off, and the external flue Severe burning and other problems
Once the flue fails, it will directly cause the coking process and waste heat power generation process to stop production one after another, which will bring great economic losses to the enterprise. At the same time, the flue gas will be directly discharged without the desulfurization tower, causing pollution to the atmospheric environment.

Method used

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  • Coke oven flue reinforcing and maintaining method

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Effect test

Embodiment 1

[0044] In this embodiment, the coke oven flue reinforcement and maintenance method includes the following steps:

[0045] A coke oven flue reinforcement maintenance method, comprising the following steps:

[0046] S1, determine the damaged area of ​​the flue lining, and make holes on the flue steel shell at the damaged area of ​​the flue lining to form repair holes;

[0047] S2, use a mixture of joint filler and insulation cotton to fill the cracks in the flue lining at the repaired hole;

[0048] S3, filling the gunning material between the flue lining at the repair hole and the inner surface of the flue steel shell;

[0049] S4, welding the steel plate at the repaired hole to repair the hole.

[0050]In this embodiment, in S1, the surface temperature of the steel shell 3 of the flue 1 is first detected. At this time, the air flow inside the flue 1 directly contacts the steel shell 3 through these cracks, causing the surface temperature of the steel shell 3 to rise, and th...

Embodiment 2

[0055] In this embodiment, in S1, the smoke output from the flue 1 can be detected and measured, and when the smoke output from the flue is lower than a certain set value, it can be determined that the inner lining of the flue 1 has a damaged area.

[0056] In S1, a smoke volume detection device is installed along a certain distance in the flue 1 to detect the amount of smoke flowing through the smoke volume detection device in real time to determine whether the smoke flow rate is normal. When the smoke volume at the location is lower than a certain set value, it can be judged that there is a damaged area in the upstream of the smoke detection device; The concentration and density of the flue gas in the area, the area where the concentration and density change suddenly can be determined as the damaged area of ​​the inner lining of the flue 1, and the steel shell 3 of the flue 1 is opened at the determined damaged area of ​​the inner lining of the flue 1 hole.

Embodiment 3

[0058] In this embodiment, S2 also includes the following steps:

[0059] S21, cleaning and repairing residues, floating powder, etc. in the cracks of the flue 1 lining in the hole 4 and on the surface of the flue lining refractory brick 2. cracks, cracks between the flue 1 lining refractory brick 2 and the flue steel shell 3 around the repair hole 4, that is, all cracks observed through the repair hole 4;

[0060] S22, in the cracks that appear in the flue 1 lining refractory brick 2 in the repair hole 4, in the cracks between the refractory brick 2 and the refractory brick 2, and in the cracks between the flue 1 lining refractory brick 2 and the flue steel around the repair hole 4 Fill the cracks between the inner surfaces of the shell 3 with a mixture of seam filler and thermal insulation cotton;

[0061] S23, laying a layer of a mixture of joint filling material and thermal insulation cotton on the surface of the refractory brick 2 lining the flue 1 in the repair hole 4. ...

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Abstract

The invention discloses a coke oven flue reinforcing and maintaining method. The method comprises steps as follows: S1, judging the damaged area of a flue lining, and forming a repairing hole in a flue steel casing in the damaged area of the flue lining; S2, grouting and filling a crack of the flue lining with a crack repairing material and thermal insulation cotton at the repairing hole; S3, filling a gap between the flue lining at the repairing hole and the inner surface of the flue steel casing with a gunning material; S4, welding a steel plate at the repairing hole for hole repairing. Through a series of procedures including hole forming, filling of the crack repairing agent and thermal insulation cotton, filling of the gunning material and hole repairing, cracks in the flue can be directly filled, burning loss of airflow in the flue to the flue steel casing is avoided, the compactness of the flue is increased, and the service life of the flue is prolonged.

Description

technical field [0001] The invention belongs to the technical field of coke oven flues, and in particular relates to a reinforcement and maintenance method for coke oven flues. Background technique [0002] The clean heat recovery coking oven adopts negative pressure operation, and the high-temperature flue gas generated in the coking process is collected through the supporting flue, and then used in the downstream waste heat power generation process. The cylinder body of the flue is made of steel plate, and the inner lining of the flue is made of refractory material. One is to prevent the high-temperature raw coal gas from directly contacting the steel plate, causing tar condensation to block the flue. Deformation and collapse occur when the temperature rises. The lining of the flue is generally clay refractory bricks, and the clay refractory bricks are built on the inner wall of the flue through refractory mud. Since the mud cannot reach the sintering critical value at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B29/00
CPCC10B29/00
Inventor 郭培瑞郝建祥王旭兵
Owner 山西沁新能源集团股份有限公司