CN106871704B - A kind of online blocking method of tubular heat exchanger - Google Patents
A kind of online blocking method of tubular heat exchanger Download PDFInfo
- Publication number
- CN106871704B CN106871704B CN201611233638.5A CN201611233638A CN106871704B CN 106871704 B CN106871704 B CN 106871704B CN 201611233638 A CN201611233638 A CN 201611233638A CN 106871704 B CN106871704 B CN 106871704B
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- China
- Prior art keywords
- heat exchanger
- tube sheet
- round steel
- nut
- gasket
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to a kind of online blocking methods of tubular heat exchanger.This method first chooses the round steel that an overall diameter is less than heat exchanger tube interior diameter, in the equal external threading in the both ends of the round steel；Then so that round steel is passed through the heat exchanger tube at leakage from side tube sheet and is stretched out and be respectively mounted nut in the outside of other side tube sheet, and in being stretched out at the two ends of two sides tube sheet respectively for round steel, cricoid gasket is provided between nut and the outer plate surface of the tube sheet；Sealing material is wound between the internal screw thread of the nut and the external screw thread of round steel；Two end nuts are finally tightened, being tightly pressed against nut by gasket in the outer plate surface of the tube sheet can be realized leakage eliminating.This method is not required to system shutdown, as long as tube side can isolate, so that it may eliminate leakage in heat exchanger, the accident that full factory stops caused by revealing because of an equipment is avoided to occur.In addition, the present invention is not necessarily to fire operation, no matter whether shell side medium is inflammable and explosive medium, the method can be used and eliminate leak source.
Description
Technical field
The invention belongs to tubular heat exchanger maintenance technique fields, and in particular to a kind of online leak stopping side of tubular heat exchanger
Method.
Background technique
It is general using in tube sheet and heat exchanger tube when the leakage of the weld of tube sheet and heat exchanger tube for tubular heat exchanger
Locate repair welding or heat exchanger tube is blocked using welding manner.However, in the tubular heat exchanger in nitrogen fertilizer plant's production system,
Since nitrogen fertilizer plant's production system is still being run, displacement can not be isolated in the methanol in shell side, therefore methanol is constantly from tube sheet leakage place
Outflow, and since methanol is flammable and combustible liquids, welding manner not can be used and eliminate leak source.
Handle heat exchanger tube sheet leakage another kind commonly use leakage eliminating method be using hardness lower metal such as aluminium, copper etc.,
By this soft intermetallic composite coating at the cylinder with taper, taper is determined by heat exchange pipe size.Taper one end wedging of cylinder is changed
In heat pipe, it is fixed on cylinder using the frictional force between the fashionable elastic force generated by deformation of cylindrical wedge and cylinder and tube sheet
In heat exchanger tube.This method only can be reduced leakage and cannot completely eliminate leak source；And this cannot be used when tube side pressure is higher
Method, because tube side medium is likely larger than the frictional force between cylinder and tube sheet to the active force of cylinder, so that leakage eliminating be caused to lose
It loses, may cause safety accident when serious.E2218 poor methanol water cooler tube side pressure about 6.8Mpa, hypertonia, therefore not
The method that cylinder wedging heat exchanger tube can be used eliminates leak source.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of online blocking methods of tubular heat exchanger.This method letter
It is single easy, in the case where heat exchanger tube tube side can isolate, the interior leakage of heat exchanger can be eliminated without system shutdown, and with pressure stifled
Leakage works well.
In order to achieve the object of the present invention, the invention adopts the following technical scheme:
A kind of online blocking method of tubular heat exchanger, comprising the following steps:
S1, the round steel that an overall diameter is less than heat exchanger tube interior diameter is chosen, in the equal external threading in the both ends of the round steel；
S2, so that round steel is passed through the heat exchanger tube at leakage from side tube sheet and stretch out in the outside of other side tube sheet, and in circle
Being stretched out at the two ends of two sides tube sheet respectively for steel is respectively mounted nut, is provided with ring between nut and the outer plate surface of the tube sheet
The gasket of shape；Sealing material is wound between the internal screw thread of the nut and the external screw thread of round steel；
S3, two end nuts are tightened, is tightly pressed against nut by gasket in the outer plate surface of the tube sheet.
Preferably, the gasket is rubber pad, and the sealing material is unsintered tape.
Preferably, the annular diameters of the gasket are greater than the weldering of the cyclic annular leg of exchanger tubes and tubesheets outer plate surface intersection
Foot outer diameter.
Preferably, the nut is provided with bulge loop in the side towards gasket, and the height of the bulge loop is greater than the weldering
The axial dimension of foot, the bulge loop are adapted with the radial dimension of gasket.
The beneficial effects of the present invention are:
1) present invention uses vehicle threaded round steel in both ends to wear as pull rod using the tube sheet at heat exchanger tube both ends as sealing surface
Heat exchanger tube is crossed, uses two nuts as fastener, when being socketed in two nuts of round steel end respectively and tightening mutually, nut will be pressed
Gasket seal between tight nut and tube sheet, to constitute closing between two nuts, heat exchanger tube sheet and heat exchanger shells
Space, thoroughly cut off dielectric leakage channel, prevent fluid to be leaked in tube side by shell side, be finally reached elimination leak source
Purpose.
It can be seen from the above, this method is not required to system shutdown, as long as tube side can isolate, so that it may eliminate leakage in heat exchanger, keep away
Exempt from the accident that full factory stops caused by revealing because of an equipment to occur.In addition, the present invention is not necessarily to fire operation, no matter shell side medium is
No is inflammable and explosive medium, and the method can be used and eliminate leak source.
2) since the present invention can eliminate heat exchanger leakage in the case where not parking, reduce because heat exchanger leakage is made
At non-normal stop and underproduction situation.By taking nitrogen fertilizer plant produces 300000 tons of synthesis ammonia per year as an example, disastershutdown of every reduction can be straight
Millions of members that bring benefits are connect, therefore the present invention has more great economic benefit.
3) this method, which can also eliminate heat exchanger leakage, can reduce leakage medium pollution caused by system and environment, avoid
Because disastershutdown is damaging caused by environment, there is preferable social benefit.
Detailed description of the invention
Fig. 1 is the leakage eliminating apparatus structure schematic diagram in the present invention.
Fig. 2 is the use state diagram of the leakage eliminating device in the present invention.
Fig. 3 is the partial enlarged view of Fig. 2.
Attached meaning marked in the figure is as follows:
10- tube sheet 11- leg 20- heat exchanger tube 30- round steel
40- nut 41- bulge loop 50- gasket
Specific embodiment
More specific detail is made to technical solution of the present invention below with reference to embodiment:
A kind of online blocking method of tubular heat exchanger, comprising the following steps:
S1, the round steel 30 that an overall diameter is less than 20 interior diameter of heat exchanger tube is chosen, outside the equal vehicle in both ends of the round steel 30
Screw thread.20 interior diameter of heat exchanger tube is Φ 15mm in the present embodiment, and the overall diameter of round steel 30 is Φ 11mm；
S2, making heat exchanger tube 20 of the round steel 30 at leakage, the outside in two tube sheets 10 is stretched out at the both ends of round steel 30,
And it is respectively mounted nut 40 in being stretched out at the two ends of two sides tube sheet respectively for round steel 30, the outside plate of nut 40 and the tube sheet 10
Cricoid gasket 50 is provided between face, the gasket 50 is rubber pad；The internal screw thread of the nut is outer with round steel 30
The unsintered tape of sealing is wound between screw thread；
As shown in Figure 2,3, the nut 40 is provided with bulge loop 41, the height of the bulge loop 41 in the side towards gasket 50
Degree is greater than the axial dimension of the leg, and the bulge loop 41 is adapted with the radial dimension of gasket 50.The gasket 50
Annular diameters are greater than the leg outer diameter of the cyclic annular leg of heat exchanger tube 20 and 10 outer plate surface intersection of tube sheet.
The present invention makes restriction to the size of gasket 50 by the way that bulge loop 41 is arranged on nut 40, so that nut 40
It will not be interfered during installation with leg 11 with gasket 50, so as to realize safely and reliably sealing effect.
The size of certain nut 40 can not be interfered with the leg between other exchanger tubes and tubesheets.
S3, two end nuts 40 are tightened, nut 40 is made to be tightly pressed against the outer plate surface of the tube sheet 10 by gasket 50
On, so that surrounding envelope jointly between two 40, two, nut tube sheets 10 of gasket 50, two and shell (being not shown in Fig. 2)
The space closed thoroughly cuts off the channel of shell side dielectric leakage, prevents fluid to be leaked in tube side by shell side, be finally reached and disappeared
Except the purpose of leak source.
The present invention is particularly applicable in E2218 poor methanol water cooler.The tube side medium of E2218 poor methanol water cooler is
Recirculated water can be isolated；Shell side medium is methanol, can not be isolated, and the methanol in shell side continues to reveal to tube side.In the feelings that do not weld
Under condition, using the above method, the leakage of tube sheet has been effectively eliminated.
Claims (4)
1. a kind of online blocking method of tubular heat exchanger, comprising the following steps:
S1, the round steel (30) that an overall diameter is less than heat exchanger tube (20) interior diameter is chosen, in the equal vehicle in both ends of the round steel (30)
External screw thread；
S2, so that round steel (30) is passed through the heat exchanger tube (20) at leakage from side tube sheet (10) and stretch out in other side tube sheet (10)
Outside, and being respectively mounted nut (40) in being stretched out at the two ends of two sides tube sheet respectively for round steel (30), nut (40) with it is described
Cricoid gasket (50) are provided between the outer plate surface of tube sheet (10)；The internal screw thread of the nut and the external screw thread of round steel (30)
Between be wound with sealing material；
S3, two end nuts (40) are tightened, nut (40) is made to be tightly pressed against the outer of the tube sheet (10) by gasket (50)
In plate face.
2. the online blocking method of tubular heat exchanger as described in claim 1, it is characterised in that: the gasket (50) is rubber
Rubber mat, the sealing material are unsintered tape.
3. the online blocking method of tubular heat exchanger as claimed in claim 1 or 2, it is characterised in that: the gasket (50)
Annular diameters be greater than heat exchanger tube (20) and tube sheet (10) outer plate surface intersection cyclic annular leg leg outer diameter.
4. the online blocking method of tubular heat exchanger as claimed in claim 3, it is characterised in that: the nut (40) is in direction
The side of gasket (50) is provided with bulge loop (41), and the height of the bulge loop (41) is greater than the axial dimension of the leg, described
Bulge loop (41) is adapted with the radial dimension of gasket (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611233638.5A CN106871704B (en) | 2016-12-28 | 2016-12-28 | A kind of online blocking method of tubular heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611233638.5A CN106871704B (en) | 2016-12-28 | 2016-12-28 | A kind of online blocking method of tubular heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106871704A CN106871704A (en) | 2017-06-20 |
| CN106871704B true CN106871704B (en) | 2019-10-22 |
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ID=59164073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611233638.5A Active CN106871704B (en) | 2016-12-28 | 2016-12-28 | A kind of online blocking method of tubular heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106871704B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7403869B2 (en) | 2022-03-18 | 2023-12-25 | 株式会社Spf | Sealing equipment for heat transfer tubes of heat exchangers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191316545A (en) * | 1913-07-18 | 1914-04-16 | Henry Thomas Mason | Improvements in or relating to Plugs for Boiler Tubes and the like. |
| GB109884A (en) * | 1916-11-17 | 1917-10-04 | Levy Erastus Carter | Improvements in Means for Stopping or Diverting Leaks in Steam Generators. |
| US1444351A (en) * | 1921-04-01 | 1923-02-06 | Martino Letterio | Boiler-tube stopper |
| GB788505A (en) * | 1956-08-15 | 1958-01-02 | William George Smith | Improvements in or relating to devices for sealing or stopping defective boiler tubes |
| EP0416848A1 (en) * | 1989-09-08 | 1991-03-13 | Nnc Limited | Heat exchangers |
| US5016674A (en) * | 1990-01-22 | 1991-05-21 | Kiss Stephen J | Rod plug caps |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE58053C (en) * | H. broichsitter in Bremerhaven | Smoke pipe stopper | ||
| JP2000213890A (en) * | 1999-01-20 | 2000-08-02 | Seo Koatsu Kogyo Kk | Sealing plug for pipe end of heat exchanger |
| US20060277756A1 (en) * | 2005-06-08 | 2006-12-14 | James Ivery | Boiler plug |
-
2016
- 2016-12-28 CN CN201611233638.5A patent/CN106871704B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191316545A (en) * | 1913-07-18 | 1914-04-16 | Henry Thomas Mason | Improvements in or relating to Plugs for Boiler Tubes and the like. |
| GB109884A (en) * | 1916-11-17 | 1917-10-04 | Levy Erastus Carter | Improvements in Means for Stopping or Diverting Leaks in Steam Generators. |
| US1444351A (en) * | 1921-04-01 | 1923-02-06 | Martino Letterio | Boiler-tube stopper |
| GB788505A (en) * | 1956-08-15 | 1958-01-02 | William George Smith | Improvements in or relating to devices for sealing or stopping defective boiler tubes |
| EP0416848A1 (en) * | 1989-09-08 | 1991-03-13 | Nnc Limited | Heat exchangers |
| US5016674A (en) * | 1990-01-22 | 1991-05-21 | Kiss Stephen J | Rod plug caps |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106871704A (en) | 2017-06-20 |
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