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Coking ammonium sulphate front part gas pipeline pressure welding method

A gas pipeline, coking sulfur technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of not being able to weld large areas of corrosion and leakage of gas pipelines, and achieve the effect of reducing daily special care costs

Active Publication Date: 2013-11-27
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is not possible to weld large-area corroded and leaked gas pipes

Method used

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  • Coking ammonium sulphate front part gas pipeline pressure welding method

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Embodiment

[0050] For a schematic diagram of this embodiment, see figure 1 , this embodiment includes the following steps in sequence:

[0051] Ⅰ , control oxygen content

[0052]From the coke oven, rising pipe, gas collecting pipe, electric tar catcher to the entire negative pressure operation area of ​​the blower, the gas pipeline 1 with an outer diameter of 1.6 meters and a length of 100 meters ensures that the gas pipeline 1 and the connecting pipeline are sealed with the outside world. Reduce the coal loading time, coke pushing time, and close the observation hole to clean the hole to strictly control the air inhaled into the negative pressure area, so as to effectively control the oxygen content in the gas; the oxygen content in the negative pressure operation area cannot exceed the limit, and the oxygen content is not more than 2%. An abnormality should be checked and ruled out in time.

[0053] Ⅱ , to ensure blower pressure

[0054] Strictly ensure the stable operation of th...

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Abstract

The invention relates to a coking ammonium sulphate front part gas pipeline pressure welding method. The method includes the following steps of step 1, enabling oxygen contents of a negative pressure operation area to be not more than 2%, step 2, enabling intensity of pressure of an air blower to be 14.5-15.5KPa, step 3, carrying out mother solution water seal separation and enabling the liquid level of mother solution to be not lower than 2.5m, step 4, plugging leak points, specifically, welding a V-shaped roll plate to prepare semi-circular arc-shaped roll plates, combining the two arc-shaped roll plates into a pair, welding the arc-shaped roll plates into a circular steel barrel to cover a gas pipeline, cutting the arc-shaped roll plates on connection portions of branch pipes and the gas pipeline into arc-shaped ports, and leading in nitrogen, step 5, manufacturing an arc-shaped-mouth horn barrel and a circular-mouth horn barrel and cutting the two horn barrels into symmetrical two halves respectively, and step 6, welding the horn barrels, specifically, welding the circular-mouth horn barrel with the arc-shaped roll plates, and welding the arc-shaped-mouth horn barrel with the arc-shaped ports and the gas pipeline. According to the welding method, the gas pipeline can be welded under the condition that a coke oven and a gas purification device operate normally.

Description

[0001] technical field [0002] The invention relates to a method for pressure welding of a coal gas pipeline in the front section of coking sulfur ammonia. Background technique [0003] Due to long-term exposure to sulfuric acid gas mist, the gas pipeline in the coking sulfur ammonia production section is in an environment susceptible to corrosion, especially in the section between the blower and the inlet of the ammonium sulfate saturator. Many gas leaks have been caused by perennial corrosion, and the local pipe wall thickness has dropped sharply to About 2-3mm, there is a major safety hazard, once the incident occurs, the consequences will be disastrous. Coking, especially metallurgical coking, has strong continuous production characteristics, and does not have the conditions to stop production for dozens of hours to maintain and replace gas pipelines. The existing methods for treating gas pipeline corrosion in the front section of coking sulfur and ammonia must stop pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
Inventor 国金波周向东
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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