CN113340536A - Method for searching leakage tube array of tube array heat exchanger - Google Patents
Method for searching leakage tube array of tube array heat exchanger Download PDFInfo
- Publication number
- CN113340536A CN113340536A CN202110402753.5A CN202110402753A CN113340536A CN 113340536 A CN113340536 A CN 113340536A CN 202110402753 A CN202110402753 A CN 202110402753A CN 113340536 A CN113340536 A CN 113340536A
- Authority
- CN
- China
- Prior art keywords
- absorbent cotton
- heat exchanger
- cotton balls
- alkaline solution
- tube array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/222—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a method for searching leakage tube array of a tube array heat exchanger, which comprises the following steps: s1, injecting an alkaline solution into the shell side of the shell-and-tube heat exchanger; s2, pressurizing the alkaline solution through a hydrostatic test pump, winding and binding the absorbent cotton balls soaked with the phenolphthalein reagent by using stainless steel wires, plugging the absorbent cotton balls into each row pipe, and pulling the absorbent cotton balls back and forth in the row pipes; and S3, if the absorbent cotton balls turn red, indicating that the corresponding tubes are leaked, and fully welding and sealing the tubes by adopting stainless steel cylinders with the same caliber. The invention adopts two substances, can conveniently find out the specific leaked tube nest, and has the advantages of low cost, convenient operation, safety and reliability.
Description
Technical Field
The invention relates to the technical field of chemical engineering, in particular to a method for searching for a leakage tube nest of a tube nest heat exchanger.
Background
The shell and tube heat exchanger has the advantages of simple and compact structure, relatively low manufacturing cost, generally thin (0.1mm) tube wall of the shell and tube, good heat exchange effect and relatively wide industrial application; however, the tube wall of the tube array is thin, and after long-time use, the leakage phenomenon of individual tube arrays can occur, which can affect the product quality; because the tubulation is more, arranges densely, and some tubulations pipe diameters are thinner, can hardly be discerned and find specific pipeline when the tubulation wherein produces the crack and takes place slight leakage.
Most manufacturers adopt a water or nitrogen leakage test method, although the leakage of the tube array can be proved, when a small crack is generated in the tube array with a thin tube diameter, the ray inspection cannot be carried out, and the specific tube array can be hardly found.
Therefore, a method for searching for a leaking tube array in a tube array heat exchanger is needed.
Disclosure of Invention
The invention aims to provide a method for searching for a leakage tube array of a tube array heat exchanger aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for searching the leakage tube array of the tube array heat exchanger comprises the following steps:
s1, injecting an alkaline solution into the shell side of the shell-and-tube heat exchanger;
s2, pressurizing the alkaline solution through a hydrostatic test pump, winding and binding the absorbent cotton balls soaked with the phenolphthalein reagent by using stainless steel wires, plugging the absorbent cotton balls into each row pipe, and pulling the absorbent cotton balls back and forth in the row pipes;
and S3, if the absorbent cotton balls turn red, indicating that the corresponding tubes are leaked, and fully welding and sealing the tubes by adopting stainless steel cylinders with the same caliber.
Preferably, step S1 further includes:
s1-1, disassembling an upper end enclosure and a lower end enclosure of the tubular heat exchanger;
s1-2, disconnecting the flange at the connecting pipe on the shell side from the pipeline of other equipment, and sealing the flange by using a blind flange;
s1-3, opening a hole in the middle of one of the blind flanges, and welding short pipes;
s1-4, injecting an alkaline solution into the shell side from the short pipe.
Preferably, the short tube is a stainless steel SS304 or SS316 short tube of DN 25.
Preferably, the alkaline solution is a NaOH solution or/and a KOH solution.
Preferably, the alkaline solution is a 0.5% NaOH solution or/and a 0.5% KOH solution.
A short carbon steel pipe is not adopted, so that the reaction with alkali is prevented, and ferric hydroxide is generated; in particular, the stainless steel heat exchanger cannot be tested for leakage or cleaned by hydrochloric acid acidic substances, because the stainless steel is particularly easy to corrode after contacting with chloride ions, influences the subsequent use, or is rotten after short service life; the absorbent cotton balls and stainless steel wires are used because: the absorbent cotton ball is difficult to contain impurities; the stainless steel wire has good alkali resistance, is difficult to react to generate impurities, and prevents pollution.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
the invention adopts two substances, can conveniently find out the specific leaked tube nest, and has the advantages of low cost, convenient operation, safety and reliability.
Drawings
FIG. 1 is a schematic structural diagram of a tubular heat exchanger for searching for a leaking tubular according to the present invention.
Detailed Description
The method for searching the leakage tube array of the tube array heat exchanger comprises the following steps:
s1-1, disassembling an upper end enclosure and a lower end enclosure of the tubular heat exchanger;
s1-2, disconnecting the flange at the connecting pipe on the shell side from the pipeline of other equipment, and sealing the flange by using a blind flange;
s1-3, opening a hole in the middle of one of the blind flanges, and welding a stainless steel SS304 or SS316 short pipe of DN 25;
s1-4, injecting an alkaline solution (0.5% NaOH solution or 0.5% KOH solution) into the shell side from the short pipe;
s2, pressurizing the alkaline solution through a hydrostatic test pump, winding and binding the absorbent cotton balls soaked with the phenolphthalein reagent by using stainless steel wires, plugging the absorbent cotton balls into each row pipe, and pulling the absorbent cotton balls back and forth in the row pipes;
and S3, if the absorbent cotton balls turn red, indicating that the corresponding tubes are leaked, and fully welding and sealing the tubes by adopting stainless steel cylinders with the same caliber.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Examples
As shown in fig. 1, in a workshop for producing the nonionic surfactant, a large amount of heat is generated in the reaction process through the reaction of fatty alcohol and ethylene oxide, the material exchanges heat with heat-conducting oil, the color of the material is colorless and transparent, and the heat-conducting oil is yellow and black; the color of the produced product is high in yellowness degree, after raw materials, auxiliary materials and operation indexes are eliminated, the leakage of the tube array of the heat exchanger is suspected, the wall of the tube array of the heat exchanger is thin (0.1mm), the leaked tube cannot be found by a plurality of methods (such as steam passing, water passing, hydrostatic test and the like), and the leaked tube is found and blocked by the hydrostatic test (namely potassium hydroxide is added into water and a degreased cotton ball containing phenolphthalein is adopted).
The invention adopts two substances, can conveniently find out the specific leaked tube nest, and has the advantages of low cost, convenient operation, safety and reliability.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. A method for searching for a leakage tube array of a tube heat exchanger is characterized by comprising the following steps:
s1, injecting an alkaline solution into the shell side of the shell-and-tube heat exchanger;
s2, pressurizing the alkaline solution through a hydrostatic test pump, winding and binding the absorbent cotton balls soaked with the phenolphthalein reagent by using stainless steel wires, plugging the absorbent cotton balls into each row pipe, and pulling the absorbent cotton balls back and forth in the row pipes;
and S3, if the absorbent cotton balls turn red, indicating that the corresponding tubes are leaked, and fully welding and sealing the tubes by adopting stainless steel cylinders with the same caliber.
2. The method according to claim 1, wherein step S1 further comprises:
s1-1, disassembling an upper end enclosure and a lower end enclosure of the tubular heat exchanger;
s1-2, disconnecting the flange at the connecting pipe on the shell side from the pipeline of other equipment, and sealing the flange by using a blind flange;
s1-3, opening a hole in the middle of one of the blind flanges, and welding short pipes;
s1-4, injecting an alkaline solution into the shell side from the short pipe.
3. The method of claim 1, wherein the spool is DN25 stainless steel SS304 or SS316 spool.
4. The method according to claim 1, characterized in that the alkaline solution is a NaOH solution or/and a KOH solution.
5. The method according to claim 4, wherein the alkaline solution is a 0.5% NaOH solution or/and a 0.5% KOH solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402753.5A CN113340536B (en) | 2021-04-14 | 2021-04-14 | Method for searching leakage tube array of tube array heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402753.5A CN113340536B (en) | 2021-04-14 | 2021-04-14 | Method for searching leakage tube array of tube array heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113340536A true CN113340536A (en) | 2021-09-03 |
| CN113340536B CN113340536B (en) | 2022-09-23 |
Family
ID=77468088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110402753.5A Active CN113340536B (en) | 2021-04-14 | 2021-04-14 | Method for searching leakage tube array of tube array heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113340536B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6266137A (en) * | 1985-09-19 | 1987-03-25 | Minoru Yoshimura | Inspection method for leakage of piping |
| JP2010107476A (en) * | 2008-10-31 | 2010-05-13 | Toshihiko Kitazawa | Method for detecting gas leakage point, kit for detecting gas leakage, and sheet for detecting gas leakage |
| CN102384827A (en) * | 2011-11-23 | 2012-03-21 | 安徽淮化股份有限公司 | Leak detection device for U-shaped waste heat boiler pipe column |
| CN102564713A (en) * | 2012-02-09 | 2012-07-11 | 昆明川金诺化工股份有限公司 | Method for detecting leakage of tube nest of sulfuric acid heat exchanger |
| CN108151978A (en) * | 2017-11-24 | 2018-06-12 | 重庆赛格尔汽车配件有限公司 | A kind of air-conditioning duct air-tightness rapid detection method |
| CN207675381U (en) * | 2018-01-23 | 2018-07-31 | 大唐环境产业集团股份有限公司 | A kind of ammonia leakage detection device |
-
2021
- 2021-04-14 CN CN202110402753.5A patent/CN113340536B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6266137A (en) * | 1985-09-19 | 1987-03-25 | Minoru Yoshimura | Inspection method for leakage of piping |
| JP2010107476A (en) * | 2008-10-31 | 2010-05-13 | Toshihiko Kitazawa | Method for detecting gas leakage point, kit for detecting gas leakage, and sheet for detecting gas leakage |
| CN102384827A (en) * | 2011-11-23 | 2012-03-21 | 安徽淮化股份有限公司 | Leak detection device for U-shaped waste heat boiler pipe column |
| CN102564713A (en) * | 2012-02-09 | 2012-07-11 | 昆明川金诺化工股份有限公司 | Method for detecting leakage of tube nest of sulfuric acid heat exchanger |
| CN108151978A (en) * | 2017-11-24 | 2018-06-12 | 重庆赛格尔汽车配件有限公司 | A kind of air-conditioning duct air-tightness rapid detection method |
| CN207675381U (en) * | 2018-01-23 | 2018-07-31 | 大唐环境产业集团股份有限公司 | A kind of ammonia leakage detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113340536B (en) | 2022-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113340536B (en) | Method for searching leakage tube array of tube array heat exchanger | |
| CN101713698A (en) | Vacuum leak detection system | |
| CN203011654U (en) | Clamp used for pressure test of heat exchange tube | |
| CN101862917A (en) | Welding process of double-tube plate heat exchange equipment | |
| CN214502823U (en) | Pressure testing device for U-shaped tube heat exchanger | |
| CN105091631A (en) | Coaxial tubular heat exchanger with function of monitoring leakage in real time | |
| CN212584508U (en) | Rubber pipe joint for solving high-low temperature circulating leakage | |
| CN213902058U (en) | Tube orifice protective sleeve of tube type heat exchanger | |
| CN209961055U (en) | Improved generation air cooler pipe case tube bank leak test leaking stoppage frock | |
| CN213903129U (en) | Whole hydrostatic test device of boiler product part | |
| CN211903842U (en) | Double-casing double-tube-plate shell-and-tube heat exchanger | |
| CN201251381Y (en) | Double-insulation leakproof tube bank | |
| CN211648569U (en) | Molten salt axial compressor is with preventing leaking device | |
| CN219178830U (en) | Pressure testing tool | |
| CN219413837U (en) | Pipeline connecting device | |
| CN210920974U (en) | Device for detecting fluid parameters in oil-gas pipeline | |
| CN220727463U (en) | Low-expansion hydraulic rubber pipe assembly | |
| CN219809968U (en) | Quick joint structure of antiseep radiator | |
| CN111089712A (en) | Thin-wall capillary pipeline pressure-bearing detection device | |
| CN220854017U (en) | Tool for pressure test and plugging of tubulation | |
| CN104501630A (en) | Heat exchanger | |
| CN219714671U (en) | Single tube detection pressing device of tube bundle type heat exchanger | |
| CN219994058U (en) | Multi-nozzle cooling cylinder of sectional cooling loop | |
| CN211358849U (en) | Novel tube box of triamine reactor | |
| CN220851105U (en) | Adapter tube assembly and detection equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |