Sulfur recovery process pipe heat treatment construction method
A technology of process pipeline and construction method, which is applied in the direction of heat treatment furnace, heat treatment equipment, heat treatment process control, etc., can solve the problems of numerous procedures, high production cost, and high requirements for operator experience, and achieve the effect of reasonable procedure and low manufacturing cost
Inactive Publication Date: 2016-06-08
CHONGQING JIEWEI DIE & MOLD
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Problems solved by technology
[0002] The existing heat treatment construction methods for sulfur recovery process pipelines have unreasonable process arrangements, numerous processes, and high requirements for operator experience, resulting in high production costs
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Experimental program
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Embodiment Construction
[0028] The present invention will be further described below in conjunction with embodiment:
[0029] A heat treatment construction method for a sulfur recovery process pipeline, comprising the following steps:
[0030] 1) Heat treatment process:
[0031] 1.1) The sour gas-containing medium pipes that need heat treatment should be firmly cushioned before heat treatment and cannot be shaken to prevent deformation during heat treatment;
[0032] 1.2) Arrangement of temperature measuring points:
[0033] 1.2.1) Reasonable layout of temperature measurement points: the arrangement of temperature measurement points should be based on the principle of accurate, reliable and representative temperature measurement; The surrounding environment is arranged, and at least one temperature measuring point is arranged for each weld to ensure the temperature accuracy of the pipe weld during heat treatment;
[0034] 1.2.2) 16# iron wire is used to fix the thermocouple. The temperature measur...
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Abstract
The invention discloses a sulfur recovery process pipe heat treatment construction method. The method comprises the following steps: 2.1) the heating range of each side of a pipe with an acid gas-contained medium in the heat treatment after welding is not lower than 3 times of the width of a welding line, and is not lower than 25 mm; and the part besides a heating strip is insulated; 2.2.1) heating speed: after the temperature rises to 300 DEG C, the heating speed is not higher than 5125 / delta (DEG C / h), and is not higher than 220 DEG C / h; 2.2.2) constant-temperature time: the constant temperature of every millimeter wall thickness of 20# steel is kept by 3 minutes, and is not shorter than 30 minutes; the wall thickness of an engineering alkali liquid pipe is 5.5 mm; the constant-temperature time is determined as 30 minutes; the constant-temperature range is 600-650 DEG C; and within the constant-temperature time, the difference between the highest temperature and the lowest temperature is lower than 50 DEG C; and 2.2.3) cooling speed: the cooling speed is not higher than 6500 / delta (DEG C / h), and is not higher than 260 DEG C after the temperature is constant; and the natural cooling can be performed after the temperature is reduced to 300 DEG C. The method is reasonable in procedures and low in production cost.
Description
technical field [0001] The invention relates to a heat treatment construction method for a sulfur recovery process pipeline. Background technique [0002] The existing heat treatment construction methods for sulfur recovery process pipelines have unreasonable process arrangements, numerous processes, and high requirements for operator experience, resulting in high production costs. Contents of the invention [0003] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a heat treatment construction method for sulfur recovery process pipelines with reasonable process and low manufacturing cost. [0004] To achieve the above object, the present invention provides [0005] A heat treatment construction method for a sulfur recovery process pipeline, comprising the following steps: [0006] 1) Heat treatment process: [0007] 1.1) The sour gas-containing medium pipes that need heat treatment should ...
Claims
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IPC IPC(8): C21D9/08C21D11/00
Inventor 曾尚怀
Owner CHONGQING JIEWEI DIE & MOLD