CN1271843A - Special heat exchanger with corrosion-resistant cross-section variable low-alloy steel pipes - Google Patents
Special heat exchanger with corrosion-resistant cross-section variable low-alloy steel pipes Download PDFInfo
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- CN1271843A CN1271843A CN 00114407 CN00114407A CN1271843A CN 1271843 A CN1271843 A CN 1271843A CN 00114407 CN00114407 CN 00114407 CN 00114407 A CN00114407 A CN 00114407A CN 1271843 A CN1271843 A CN 1271843A
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- heat exchanger
- corrosion
- pipe
- steel pipes
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Abstract
A heat exchanger with special anticorrosion low-alloy tubes having variable cross-sections is disclosed, which is used in petro-chemical field. It features that the 09Cr2AlMoRE steel tube with excellent resistance against stress corrosion of H2S is used as the cross-section variable tubes of heat exchanger. Its advantages are high resistance to stress corrosion of H2S, excellent heat conductivity, and low cost of equipment.
Description
The present invention relates to the corrosion-resistant field of heat exchangers that petrochemical plant is used.
Be generally stainless steel, copper material or ordinary carbon steel at the existing variable cross-section heat exchanger tubing of having announced with material, as the patent CN2314333Y that announced on April 14th, 99 and CN2314327Y etc., all only select stainless steel or copper material for use at raising heat transfer efficiency and general high temperature corrosion state, but stainless steel and copper material have bigger limitation in many corrosive environments, stress corrosion as not anti-hydrogen sulfide of stainless steel and hydrochloric acid, the not anti-ammonia corrosion of copper material, and the tubing after variable cross-section processing can produce new stress and accelerate its corrosion phenomenon.
The object of the present invention is to provide a kind of low-alloy tubing 12Cr2AlMoV of anti-H 2 S stress corrosion or the heat exchanger that 09CrAlMoRE makes various variable cross-section efficient heat conducting tubes, make heat exchanger tube have the double effects of anti-H 2 S stress corrosion and raising heat exchange efficiency simultaneously.
The present invention is by following scheme implementation:
In order to solve the anti-H 2 S (H that middle heat exchanger tube is put in the oil makeup
2S) stress corrosion problem, I had declared " corrosion-proof heat exchanger of high temperature resistance sulphur, wet hydrogen sulfide, corrosion of sulfuric acid at dew point " (publication number CN1191300A) once on September 11st, 97, on September 15th, 99 was declared " steel of anti-H 2 S, chloride ion corrosion and special equipment thereof and accessory " (application number 99116658.2), had mainly introduced anti-(H
2S) 12Cr2AlMoV of stress corrosion and the sharp 09Cr2AlMoRE of replacement shaped steel.Its varying cross-section duct and tube bank thereof can overcome former carbon steel and stainless steel varying cross-section duct insurmountable difficult problem in hydrogen sulfide medium with 12Cr2AlMoV or 09Cr2AlMoRE tubing, have fundamentally solved common variable cross-section steel pipe at anti-H 2 S (H
2S) deficiency of stress corrosion aspect.
Mainly contain spiral microgroove pipe (Fig. 2), band pipe (Fig. 3), bellows (Fig. 4), screwed pipe (Fig. 5) and T shape with the form of the varying cross-section duct of 12Cr2AlMoV or 09Cr2AlMoRE tubing processing and manage (Fig. 6) etc. five kinds.Its varying cross-section duct is identical with the standard heat exchanger with the connecting mode of heat exchanger tube sheet.The specification of its light pipe is diameter of phi 19-38mm, thickness δ=1.5-3.0mm.
The present invention compared with prior art has following advantage: 1. solved common varying cross-section duct at anti-H 2 S stress (H from material itself
2S) deficiency of corrosion aspect; 2. heat transfer efficiency significantly improves, and the thermal conductivity of low-alloy tubing itself is just high 3 times than stainless steel, and variable cross-section tubing is than the high 1.5-3.0 of heat transfer property times of light pipe.Therefore, its selection advantage is quite obvious.
Be described further below in conjunction with accompanying drawing:
Fig. 1 is a heat exchanger
Fig. 2 is a spiral microgroove pipe
Fig. 3 is the band pipe
Fig. 4 is a bellows
Fig. 5 is a screwed pipe
Fig. 6 is T shape pipe
The processing method of the variable cross-section heat-transfer pipe of corrosion-resistant tubing 12Cr2AlMoV of heat exchanger of the present invention and 09Cr2AlMoRE is consistent with the processing method of common stainless steel material, and the assembling and the indistinction of the manufacturing of heat exchanger tube and common light pipe.Because the present invention has anti-H 2 S stress corrosion simultaneously and improves the double effects of heat exchange efficiency, thereby can be widely used in the heat exchanger device of industries such as petrochemical industry.
Claims (2)
1, a kind of shell-and-tube heat exchanger, it is made of bobbin carriage (1), housing (2) and heat exchanger tube (3), it is characterized in that: spiral microgroove pipe or band pipe or bellows or screwed pipe or T shape pipe that the heat exchanger tube of its described heat exchanger (3) is processed into for the 09Cr2AlMoRE special steel pipe of hydrogen sulfide corrosion resistant.
2, as claims 1 described heat exchanger, it is characterized in that: its used 09Cr2AlMoRE special steel pipe specification is diameter of phi 19-38mm, thickness δ=1.5-3.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00114407 CN1271843A (en) | 2000-03-13 | 2000-03-13 | Special heat exchanger with corrosion-resistant cross-section variable low-alloy steel pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00114407 CN1271843A (en) | 2000-03-13 | 2000-03-13 | Special heat exchanger with corrosion-resistant cross-section variable low-alloy steel pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1271843A true CN1271843A (en) | 2000-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00114407 Pending CN1271843A (en) | 2000-03-13 | 2000-03-13 | Special heat exchanger with corrosion-resistant cross-section variable low-alloy steel pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1271843A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455700A (en) * | 2019-08-23 | 2019-11-15 | 合肥通用机械研究院有限公司 | Minor diameter thin wall pipe hydrogen induced cracking (HIC) test method and evaluation method |
-
2000
- 2000-03-13 CN CN 00114407 patent/CN1271843A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455700A (en) * | 2019-08-23 | 2019-11-15 | 合肥通用机械研究院有限公司 | Minor diameter thin wall pipe hydrogen induced cracking (HIC) test method and evaluation method |
| CN110455700B (en) * | 2019-08-23 | 2021-11-23 | 合肥通用机械研究院有限公司 | Small-diameter thin-walled tube hydrogen induced cracking test method and evaluation method |
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Legal Events
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |