CN106871704A - 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
- CN106871704A CN106871704A CN201611233638.5A CN201611233638A CN106871704A CN 106871704 A CN106871704 A CN 106871704A CN 201611233638 A CN201611233638 A CN 201611233638A CN 106871704 A CN106871704 A CN 106871704A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- nut
- tube sheet
- round steel
- sealing gasket
- 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.)
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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
Abstract
The present invention relates to a kind of online blocking method of tubular heat exchanger.This method first chooses round steel of the overall diameter less than heat exchanger tube interior diameter, in the equal external threading in the two ends of the round steel；Then round steel is passed through the heat exchanger tube at leakage from side tube sheet and is stretched out in the outside of opposite side tube sheet, and nut is respectively mounted at the two ends of both sides tube sheet in stretching out respectively for round steel, the sealing gasket of ring-type is provided between nut and the outer plate surface of the tube sheet；Sealing material is wound between the internal thread of the nut and the external screw thread of round steel；Two end nuts are finally tightened, nut is tightly pressed against in the outer plate surface of the tube sheet by sealing gasket and is capable of achieving 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, it is to avoid the accident of full factory's parking occurs caused by an equipment is revealed.Additionally, the present invention is without fire operation, no matter whether shell side medium is inflammable and explosive medium, leak source can be eliminated using the method.
Description
Technical field
The invention belongs to tubular heat exchanger maintenance technique field, and in particular to a kind of online leak stopping side of tubular heat exchanger
Method.
Background technology
It is general using in tube sheet and heat exchanger tube when the weld of tube sheet and heat exchanger tube is revealed for tubular heat exchanger
Place's repair welding blocks heat exchanger tube using welding manner.However, for tubular heat exchanger in nitrogen fertilizer plant's production system,
Because nitrogen fertilizer plant's production system is still in operation, the methyl alcohol in shell side cannot isolate displacement, therefore methyl alcohol is continuous from tube sheet leakage
Outflow, and because methyl alcohol is flammable and combustible liquids, therefore leak source can not be eliminated using welding manner.
The conventional leakage eliminating method of another kind for the treatment of heat exchanger tube sheet leakage be using the relatively low metal of hardness such as aluminium, copper etc.,
This soft intermetallic composite coating into the cylinder with taper, taper are determined by heat exchange pipe size.Taper one end wedging of cylinder is changed
In heat pipe, cylinder is fixed on using the fashionable elastic force and the frictional force between cylinder and tube sheet because of deformation generation of cylindrical wedge
In heat exchanger tube.This method is only capable of reducing leakage and leak source can not being completely eliminated；And can not use this 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 as to cause leakage eliminating to lose
Lose, security incident is likely to result in when serious.E2218 poor methanol water cooler tube side pressure about 6.8Mpa, hypertonia, therefore not
Leak source can be eliminated using the method for cylinder wedging heat exchanger tube.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of online blocking method 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 it is with pressure stifled
Leakage works well.
In order to realize the purpose of the present invention, present invention employs following technical scheme：
A kind of online blocking method of tubular heat exchanger, comprises the following steps：
S1, piece overall diameter of selection are less than the round steel of heat exchanger tube interior diameter, in the equal external threading in the two ends of the round steel；
S2, make round steel from side tube sheet through the heat exchanger tube at leakage and stretch out in the outside of opposite side tube sheet, and in circle
Stretching out respectively for steel is respectively mounted nut at the two ends of both sides tube sheet, and ring is provided between nut and the outer plate surface of the tube sheet
The sealing gasket of shape；Sealing material is wound between the internal thread of the nut and the external screw thread of round steel；
S3, two end nuts are tightened, nut is tightly pressed against in the outer plate surface of the tube sheet by sealing gasket.
Preferably, the sealing gasket is rubber blanket, and the sealing material is unsintered tape.
Preferably, weldering of the annular diameters of the sealing gasket more than the ring-type leg of exchanger tubes and tubesheets outer plate surface intersection
Pin external diameter.
Preferably, the nut is being provided with bulge loop towards the side of sealing gasket, and the height of the bulge loop is more than the weldering
The axial dimension of pin, the bulge loop is adapted with the radial dimension of sealing gasket.
The beneficial effects of the present invention are：
1) present invention is worn with the threaded round steel of two ends car by the use of the tube sheet at heat exchanger tube two ends as sealing surface as pull bar
Heat exchanger tube is crossed, with two nuts as fastener, when two nuts that round steel end is socketed in respectively are tightened mutually, nut will be pressed
Tight gasket seal between nut and tube sheet, so that two constitute closing between nut, heat exchanger tube sheet and heat exchanger shell
Space, thoroughly cut-out dielectric leakage passage, prevent fluid to be leaked in tube side by shell side, be finally reached elimination leak source
Purpose.
From the foregoing, 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
The accident for exempting from full factory's parking caused by an equipment is revealed occurs.Additionally, the present invention is without fire operation, no matter shell side medium is
No is inflammable and explosive medium, can eliminate leak source using the method.
2) because the present invention can eliminate heat exchanger leakage in the case of not parking, therefore reduce because heat exchanger leakage is made
Into non-normal stop and underproduction situation.So that nitrogen fertilizer plant produces 300000 tons of synthesis ammonia per year as an example, often reducing by a disastershutdown can be straight
Millions of units that bring benefits are met, therefore the present invention has more great economic benefit.
3) this method can also eliminate heat exchanger leakage and can reduce the pollution that leakage medium is caused to system and environment, it is to avoid
Because disastershutdown is to the infringement caused by environment, with preferable social benefit.
Brief description of the drawings
Fig. 1 is the leakage eliminating apparatus structure schematic diagram in the present invention.
Fig. 2 is the use state schematic diagram of the leakage eliminating device in the present invention.
Fig. 3 is the partial enlarged drawing of Fig. 2.
The implication marked in accompanying drawing is as follows：
10- tube sheet 11- leg 20- heat exchanger tube 30- round steel
40- nut 41- bulge loop 50- sealing gaskets
Specific embodiment
More specific detail is made to technical solution of the present invention with reference to embodiment：
A kind of online blocking method of tubular heat exchanger, comprises the following steps：
S1, piece overall diameter of selection are less than the round steel 30 of the interior diameter of heat exchanger tube 20, outside the equal car in two ends of the round steel 30
Screw thread.The interior diameter of heat exchanger tube 20 is Φ 15mm in the present embodiment, and the overall diameter of round steel 30 is Φ 11mm；
S2, make heat exchanger tube 20 of the round steel 30 at the leakage, the two ends of round steel 30 are stretched out two outsides of tube sheet 10,
And nut 40 is respectively mounted at the two ends of both sides tube sheet in stretching out respectively for round steel 30, the outside plate of nut 40 and the tube sheet 10
The sealing gasket 50 of ring-type is provided between face, the sealing gasket 50 is rubber blanket；The internal 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 being provided with bulge loop 41, the height of the bulge loop 41 towards the side of sealing gasket 50
Degree is more than the axial dimension of the leg, and the bulge loop 41 is adapted with the radial dimension of sealing gasket 50.The sealing gasket 50
Annular diameters are more than heat exchanger tube 20 and the leg external diameter of the ring-type leg of the outer plate surface intersection of tube sheet 10.
The present invention on nut 40 by setting bulge loop 41, and size to sealing gasket 50 makes restriction so that nut 40
Will not be interfered with leg 11 when mounted with sealing gasket 50, such that it is able to realize safely and reliably sealing effectiveness.
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 passed through the outer plate surface that sealing gasket 50 is tightly pressed against the tube sheet 10
On so that envelope is surrounded jointly between two 40, two, nut tube sheets 10 of sealing gasket 50, two and housing (not shown in Fig. 2)
The space closed, thoroughly the passage of cut-out shell side dielectric leakage, prevents fluid to be leaked in tube side by shell side, has been finally reached and has disappeared
Except the purpose of leak source.
The present invention is particularly applicable in E2218 poor methanol water coolers.The tube side medium of E2218 poor methanol water coolers is
Recirculated water, can isolate；Shell side medium is methyl alcohol, can not be isolated, and the methyl alcohol in shell side continues to be revealed to tube side.In the feelings do not welded
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, comprises the following steps：
S1, piece overall diameter of selection are less than the round steel (30) of heat exchanger tube (20) interior diameter, in the equal car in two ends of the round steel (30)
External screw thread；
S2, make round steel (30) from side tube sheet (10) through the heat exchanger tube (20) at leakage and stretch out in opposite side tube sheet (10)
Outside, and nut (40) is respectively mounted at the two ends of both sides tube sheet in stretching out respectively for round steel (30), nut (40) with it is described
The sealing gasket (50) of ring-type is provided between the outer plate surface of tube sheet (10)；The internal 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 tightly pressed against the outer of the tube sheet (10) by sealing gasket (50)
In plate face.
2. the online blocking method of tubular heat exchanger as claimed in claim 1, it is characterised in that：The sealing gasket (50) is rubber
Rubber cushion, the sealing material is unsintered tape.
3. the online blocking method of tubular heat exchanger as claimed in claim 1 or 2, it is characterised in that：The sealing gasket (50)
Leg external diameter of the annular diameters more than the ring-type leg of heat exchanger tube (20) and tube sheet (10) outer plate surface intersection.
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 sealing gasket (50) is provided with bulge loop (41), and the axial dimension of the height more than the leg of the bulge loop (41) is described
Bulge loop (41) is adapted with the radial dimension of sealing 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 true CN106871704A (en) | 2017-06-20 |
| CN106871704B CN106871704B (en) | 2019-10-22 |
Family
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) |
Cited By (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 (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE58053C (en) * | H. broichsitter in Bremerhaven | Smoke pipe stopper | ||
| 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 |
| 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 (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE58053C (en) * | H. broichsitter in Bremerhaven | Smoke pipe stopper | ||
| 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 |
| 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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106871704B (en) | 2019-10-22 |
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