Cracking-resistant salt and chemical making equipment pipe

A salt chemical, anti-cracking technology, applied in pipeline systems, pipeline protection, mechanical equipment, etc., can solve the problems of not significantly improving the service life of components, corrosion fatigue, etc., to increase the maximum pre-pressure value, prolong service life, and pre-pressure uniform effect

Active Publication Date: 2015-04-29
江苏淮盐矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] (2) Corrosion fatigue
However, in the stage of crack initiation, the components contributed by chemical action and mechanical action are completely different. This stage is mainly controlled by chemical action. Under the condition that environmental corrosion factors cannot be changed, crack initiation is inevitable, and it is necessary to delay crack initiation. The practice does not significantly improve the service life of components

Method used

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  • Cracking-resistant salt and chemical making equipment pipe
  • Cracking-resistant salt and chemical making equipment pipe
  • Cracking-resistant salt and chemical making equipment pipe

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0058] combine figure 1 and figure 2 It can be seen that the present invention includes a salt chemical equipment pipeline 1, on the outer wall of the salt chemical equipment pipeline 1, a plurality of tight hoops 3 are sequentially sleeved along the length direction of the pipeline, and the tight hoops 3 are in the shape of two symmetrical semicircular arcs structure, one side of the hoop 3 is connected by a hinge 4, and the other side is fixed by a bolt 6, and the hoop 3 is provided with a radial preload pointing to the axis for the pipeline 1 of the salt chemical equipment, and the radial preload It is equal to or greater than the brine 2 pressure in the pipeline 1 of the salt chemical equipment. By providing a tight band 3 on the surface of the salt chemical equipment pipeline 1, the tight band 3 exerts a radial preload on the salt chemical equipment pipeline 1, offsetting the pressure of the brine 2 in the salt chemical equipment pipeline 1 on the salt chemical equipme...

no. 2 example

[0064] like image 3It can be seen that the present invention includes a salt chemical equipment pipeline 1, an oil pressure pipeline 3' is sleeved outside the pipeline of the salt chemical equipment pipeline 1, and the oil pressure pipeline 3' is coaxially arranged with the salt chemical equipment pipeline 1. A one-way oil inlet valve 13 is provided on the side wall of the pipeline 3, and a hydraulic oil 12 is provided between the oil pressure pipeline 3 and the pipeline 1 of the salt chemical equipment. By setting the oil pressure pipeline 3' on the surface of the salt chemical equipment pipeline 1, and filling the hydraulic oil 12 between the oil pressure pipeline 3' and the salt chemical equipment pipeline 1, the pressure of the hydraulic oil 12 is equal to or greater than that of the salt chemical equipment pipeline 1 inside the brine 2 pressure. The pressure of the hydraulic oil 12 on the pipeline 1 of the salt chemical equipment offsets the pressure of the brine 2 in t...

no. 3 example

[0067] like Figure 4 It can be seen that the present invention includes a salt chemical equipment pipeline 1, an oil pressure pipeline 3' is sleeved outside the pipeline of the salt chemical equipment pipeline 1, and the oil pressure pipeline 3' is coaxially arranged with the salt chemical equipment pipeline 1. A hydraulic oil 12 is provided between the pipeline 3 and the pipeline 1 of the salt chemical equipment, and an oil inlet pipe 13' and a brine pipe B14' are respectively arranged on the side walls of the oil pressure pipeline 3', and one end of the oil inlet pipe 13' passes through The side wall of the oil pressure pipeline 3' communicates with the hydraulic oil 12 in the oil pressure pipeline 3', and the other end of the oil inlet pipe 13' communicates with the liquid outlet of the hydraulic pump 18 through the oil pipe C26; one end of the brine pipe B14' is respectively Through the side wall of the oil pressure pipeline 3' and the side wall of the salt chemical equip...

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Abstract

The invention discloses a cracking-resistant salt and chemical making equipment pipe. The cracking-resistant salt and chemical making equipment pipe comprises a salt and chemical making equipment pipe body, wherein a plurality of tightening rings sequentially sleeve the outer side wall of the salt and chemical making equipment pipe body along the length direction of the slat and chemical making equipment pipe body; each tightening ring consists of two symmetric half arcs; one sides of the tightening rings are connected to one another through hinges; the other sides of the tightening rings are fixed through bolts; the tightening rings apply a radial pre-compression force pointing to an axis to the salt and chemical making equipment pipe body; and the radial pre-compression force is equal to or greater than pressure of brine in the salt and chemical making equipment pipe body. By the structure, the radial pre-compression force is applied to the salt and chemical equipment pipe body of the cracking-resistant salt and chemical making equipment pipe, pressure of the brine in the salt and chemical making equipment pipe body on the salt and chemical making equipment pipe body is counteracted, even if the inside of the salt and chemical making equipment pipe body is subjected to pitting corrosion under a long-term effect of the brine in the salt and chemical making equipment pipe body, the circumstance that pitting corrosion portions crack due to pressure stress of the brine is avoided, and the service life of the salt and chemical making equipment pipe body is prolonged.

Description

technical field [0001] The invention relates to the field of salt chemical equipment pipelines, in particular to a crack-proof salt chemical equipment pipeline. Background technique [0002] Corrosion and cracking of equipment is a major problem in the production of salt chemical enterprises. The reason why there are various corrosion and cracking problems in salinization equipment is in the final analysis related to its extremely harsh working environment, which is mainly reflected in the following aspects: [0003] (1) Chloride ion concentration [0004] The concentration of chloride ions in brine is extremely high, which is the root cause of stainless steel corrosion. Common environmental failure modes of stainless steel components such as pitting corrosion, intergranular corrosion, crevice corrosion, stress corrosion cracking, and corrosion fatigue fracture are all related to the presence of chloride ions in the solution. [0005] Existing studies have shown that even ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/08F17D1/20F17D5/08
CPCF16L57/02
Inventor 孙少东马宪亭何时剑周兵舒希勇卢志珍
Owner 江苏淮盐矿业有限公司
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