CN217654366U - Graphite shell and tube heat exchanger microleakage prosthetic devices - Google Patents
Graphite shell and tube heat exchanger microleakage prosthetic devices Download PDFInfo
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- CN217654366U CN217654366U CN202221448834.5U CN202221448834U CN217654366U CN 217654366 U CN217654366 U CN 217654366U CN 202221448834 U CN202221448834 U CN 202221448834U CN 217654366 U CN217654366 U CN 217654366U
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Abstract
The utility model discloses a graphite tube heat exchanger micro-leakage repairing device, wherein the outlet of a high-level resin storage tank is connected with a resin filling pipeline, the pipeline is provided with a third valve, the other end of the pipeline is communicated with the inlet end of a sealing joint component at the lower end of a heat exchange tube, and the component is provided with a fourth valve; the heat exchange tube air conditioner is characterized by further comprising a heat exchange tube upper end sealing joint assembly, a sixth valve is arranged on the heat exchange tube upper end sealing joint assembly, the inlet end of the heat exchange tube upper end sealing joint assembly is connected with an air compressor through a compressed air pipeline, a seventh valve is arranged on the pipeline, the inlet end of the heat exchange tube lower end sealing joint assembly is further connected with the inlet end of a pipeline fan through a pipeline, a fifth valve is arranged on the pipeline, the outlet end of the pipeline fan is communicated with the inlet end of the heat exchange tube upper end sealing joint assembly through a hot air circulation pipeline, and an air heating device and an eighth valve are arranged on the hot air circulation pipeline. The repairing device does not need to block the pipe in the repairing process, does not need to reduce the effective heat exchange area, and greatly improves the life cycle of the graphite shell and tube heat exchanger.
Description
Technical Field
The utility model relates to a graphite shell and tube heat exchanger prosthetic devices, especially a little seepage prosthetic devices of graphite shell and tube heat exchanger.
Background
The graphite tube-in-tube heat exchanger is a strong corrosion medium heat exchanger with wide application, but the application range of the graphite tube-in-tube heat exchanger is greatly limited due to the reasons of low material strength, poor adhesion reliability of a heat exchange tube and a graphite tube plate, easy micro-leakage of the graphite heat exchange tube and the like. For many years, no reliable solution is found for the repair problem of the micro leakage of the graphite tube-type heat exchanger, the graphite tube-type heat exchanger can only be repaired by adopting a tube plugging method after leakage occurs, the effective heat exchange area is sacrificed, and when the times of tube plugging are excessive, the graphite tube-type heat exchanger can only be scrapped and replaced, so that the service life of the equipment is generally short. If the utility model relates to a repair local little seepage's of graphite heat exchange tube technological method does not need stifled pipe, does not reduce effective heat transfer area, will improve graphite shell and tube heat exchanger's life cycle greatly, changes its problem of using the restriction.
Disclosure of Invention
An object of the utility model is to provide a little seepage prosthetic devices of graphite shell and tube heat exchanger. The repairing device does not need to block pipes in the repairing process, does not need to reduce the effective heat exchange area, greatly improves the life cycle of the graphite tube-in-tube heat exchanger, and changes the problem of limited application.
The technical scheme of the utility model: the graphite tube heat exchanger micro-leakage repairing device comprises a high-level resin storage tank, wherein an outlet of the high-level resin storage tank is connected with a resin filling pipeline, a third valve is arranged on the resin filling pipeline, the other end of the resin filling pipeline is communicated with an inlet end of a heat exchange tube lower end sealing joint component, a fourth valve is arranged on the heat exchange tube lower end sealing joint component, the graphite tube heat exchanger micro-leakage repairing device also comprises a heat exchange tube upper end sealing joint component, a sixth valve is arranged on the heat exchange tube upper end sealing joint component, an inlet end of the heat exchange tube upper end sealing joint component is connected with an air compressor through a compressed air pipeline, a seventh valve is arranged on the compressed air pipeline, an inlet end of the heat exchange tube lower end sealing joint component is further connected with an inlet end of a pipeline fan through a pipeline, a fifth valve is arranged on the pipeline, an outlet end of the pipeline fan is communicated with the inlet end of the heat exchange tube upper end sealing joint component through a hot air circulation pipeline, and an air heating device and an eighth valve are arranged on the hot air circulation pipeline.
In the micro-leakage repairing device for the graphite tube array heat exchanger, the inlet end of the sealing joint assembly at the upper end of the heat exchange tube is also connected with a vent pipe, and a vent valve is arranged on the vent pipe.
In the micro-leakage repairing device for the graphite tube heat exchanger, a first glass liquid level meter is arranged on an inlet end pipeline of the sixth valve; and a second glass liquid level meter is arranged on the inlet end pipeline of the fourth valve.
In the micro-leakage repairing device for the graphite tube still heat exchanger, the sealing joint component at the lower end of the heat exchange tube and the sealing joint component at the upper end of the heat exchange tube are the same in structure and comprise 1 three-way tube, wherein 1 tube of the three-way tube is sequentially connected with a glass liquid level meter, a valve and a connecting tube, the connecting tube extends into a hollow tube single-head bolt, and an elastomer sleeve, a check ring and a nut are sequentially sleeved on the hollow tube single-head bolt.
In the graphite tube heat exchanger micro-leakage repairing device, the heat exchange tube lower end sealing joint component and the heat exchange tube upper end sealing joint component are respectively provided with a plurality of sealing joint components, and the sealing joint components are arranged in the same number.
In the micro-leakage repairing device for the graphite tube still heat exchanger, the air heating device is an electric heating tube, one end of the electric heating tube is communicated with the hot air circulation pipeline, and the other end of the electric heating tube is communicated with the inlet end of the sealing joint component at the upper end of the heat exchange tube through a pipeline.
In the micro-leakage repairing device for the graphite tube still heat exchanger, pressure gauges are arranged on the compressed air pipeline and the hot air circulating pipeline.
In the micro-leakage repairing device for the graphite tube still heat exchanger, a first thermometer is arranged on the hot air circulating pipeline, and a second thermometer is arranged on a pipeline, connected with the pipeline fan, of the sealing joint assembly at the lower end of the heat exchange tube.
The utility model has the advantages that: compared with the prior art, the utility model has the advantages of following several aspects:
1. the utility model discloses be liquid when having utilized thermosetting phenol-formaldehyde resin low temperature initial condition, the molecular chain is linear structure, very strong infiltration ability has, the permeability is good, the characteristics that viscosity is moderate and can regulate and control, impregnate its pressurization in the micropore hole of leakage point, then utilize its thermosetting characteristic, heat it to under the uniform temperature, keep the certain time, the polycondensation of resin reaches certain cross-linking degree, the molecular chain is in the same place through chemical crosslinking, form a rigid three-dimensional network structure, form and do not melt the thing, make the goods have required physical and mechanical properties. Has excellent comprehensive performance: the material has the advantages of good forming performance, large volume density, low porosity, high strength, good heat resistance, excellent electrical performance, corrosion resistance, aging resistance, good dimensional stability and the like;
2. the utility model blocks up micro-leakage holes in the maintenance process, and has simple operation and high maintenance success rate;
3. in the maintenance process, the counter bore defect which forms a tiny pot hole but is not completely penetrated is filled and repaired, so that the defect is prevented from happening in the bud and the repair quality is good;
4. the utility model discloses a device maintenance in-process forms one deck prevention of seepage membrane at graphite heat exchange tube inner wall, and the maintenance once can improve the life of heat exchanger greatly, and average service life has improved 1.2 times than traditional maintenance method, the utility model discloses improved equipment life, reduced manufacturing cost;
5. the utility model discloses little seepage repair method and device of graphite shell and tube heat exchanger need not block up the heat exchange tube, do not reduce the effective heat transfer area of heat exchanger, do not reduce heat exchange efficiency;
6. adopt the utility model discloses a prosthetic devices for the equipment life cycle of this big type of graphite tubular heat exchanger obtains promoting by a wide margin, thoroughly changes graphite tubular heat exchanger life weak point, uses limited historical current situation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is an enlarged schematic view at B of FIG. 1;
fig. 4 is a structural schematic diagram of a heat exchange tube end sealing joint assembly.
Reference numerals: 1-a high-level resin storage tank, 2-a resin filling pipeline, 3-a third valve, 4-a heat exchange pipe lower end sealing joint component, 5-a fourth valve, 6-a heat exchange pipe upper end sealing joint component, 7-a sixth valve, 8-a compressed air pipeline, 9-an air compressor, 10-a seventh valve, 11-a pipeline fan, 12-a fifth valve, 13-a hot air circulation pipeline, 14-an eighth valve, 15-an emptying pipe, 16-an emptying valve, 17-a first glass liquid level meter, 18-a second glass liquid level meter, 19-an electric heating pipe, 20-a three-way pipe, 21-a connecting pipe, 22-a hollow pipe single-end bolt, 23-an elastomer sleeve pipe, 24-a check ring, 25-a nut, 26-a pressure gauge, 27-a first temperature meter and 28-a second temperature meter.
Detailed Description
The present invention will be further described with reference to the drawings and examples, which should not be construed as a limitation to the present invention.
The embodiment of the utility model provides a: the micro-leakage repairing device of the graphite tube heat exchanger is shown in figures 1-4 and comprises: the high-order resin storage tank 1, resin fill pipeline 2, heat exchange tube end sealing joint subassembly (including heat exchange tube upper end sealing joint subassembly 6 and heat exchange tube lower extreme sealing joint subassembly 4), pipeline fan 11, heated air circulation pipeline 13, electric heating pipe 19, air compressor machine 9, compressed air pipeline 8, a plurality of valve, thermometer (including first thermometer 27 and second thermometer 28), manometer 26.
The high-level resin storage tank 1 is a cylindrical vertical or horizontal storage tank with an upper end enclosure and a lower end enclosure. The upper end socket of the high-level resin storage tank 1 is connected with the barrel through a flange in a sealing manner, so that the high-level resin storage tank is convenient to overhaul and clean, the upper end of the high-level resin storage tank 1 is provided with a feed inlet with a first valve, the lower end of the high-level resin storage tank 1 is provided with a discharge outlet with a second valve, and the lower end of the high-level resin storage tank 1 is communicated with a resin filling pipeline 2.
The resin filling pipeline 2 is provided with a third valve 3, and the resin filling pipeline 2 is communicated with a sealing joint assembly 4 at the lower end of the heat exchange tube.
The lower end sealing joint assembly 4 of the heat exchange tube is sequentially arranged from right to left as shown in the figure; the device comprises a three-way pipe 20, a glass liquid level meter, a valve, a connecting pipe 21, a hollow pipe single-head bolt 22, a nut 25, a retainer ring 24 and an elastomer sleeve 23. The hollow tube single-head bolt 22 is a cylindrical single-head bolt, a through hole concentric with the axis is arranged on the bolt, and the elastomer sleeve 23 is sleeved on the cylindrical side of the hollow tube single-head bolt 22. The connection pipe 21 is a flexible pipe.
When the device works, a universal pressure container leakage test method is adopted firstly, a heat exchange tube with micro leakage or a bonding seam between the heat exchange tube and a tube plate of the graphite tube-in-tube heat exchanger is detected, and marking is carried out. The hollow tube single-head bolt 22 and the elastomer sleeve 23 are inserted into the tube plate hole end of the graphite tube heat exchanger to be maintained, the nut 25 is screwed in to drive the retainer ring 24, the elastomer sleeve 23 is axially compressed, the elastomer sleeve 23 is circumferentially expanded, and the elastomer sleeve 23 is tightly expanded and sealed and fixed at the tube plate hole end of the graphite tube heat exchanger to realize communication with the graphite heat exchange tube.
The sealing joint components 4 at the lower ends of the heat exchange tubes can be provided with a plurality of graphite heat exchange tubes, and micro-leakage repair is carried out on the graphite heat exchange tubes and the joints between the graphite heat exchange tubes and the tube plates.
And a three-way pipe 20 of the sealing joint assembly 4 at the lower end of the heat exchange pipe is respectively communicated with the resin filling pipeline 2 and the hot air circulating pipeline 13.
The hot air circulation pipeline 13 is sequentially provided with: a fifth valve 12, a second thermometer 28, a pipeline blower 11, an electric heating pipe 19, a first thermometer 27, a pressure gauge 26, and an eighth valve 14.
The electric heating tube 19 is a pipe fitting wrapped with an electric heating coil, and a pipeline channel thereof is communicated with the hot air circulating tube 13.
And the hot air circulation pipeline 13 is communicated with the sealing joint assembly 6 at the upper end of the heat exchange tube. The structure of the heat exchange tube upper end sealing joint component 6 is the same as that of the heat exchange tube lower end sealing joint component 4. The heat exchange tube upper end sealing joint assembly 6 is used in the same manner as the heat exchange tube lower end sealing joint assembly 4.
The heat exchange tube lower end sealing joint assemblies 6 can also be provided with a plurality of graphite heat exchange tubes and the bonding positions of the graphite heat exchange tubes and the tube plates are subjected to micro-leakage repair, wherein the number of the graphite heat exchange tubes is the same as that of the heat exchange tube lower end sealing joint assemblies 4.
The three-way pipe 20 of the sealing joint assembly 4 at the upper end of the heat exchange pipe is respectively communicated with the hot air circulating pipeline 13 and the compressed air pipeline 8.
The compressed air pipeline 8 is provided with: an air release pipe 15, a seventh valve 10 and a pressure gauge 26, wherein the air release pipe 15 is provided with an air release valve 16, and the compressed air pipeline 8 is communicated with an air compressor 9. Air compressor 9 may be any device capable of outputting compressed air.
The utility model discloses little seepage repair method of graphite shell and tube heat exchanger and device operation method and work flow are as follows:
s1: when the leakage testing device works, firstly, a universal pressure container leakage testing method, such as a hydraulic pressure test or an air pressure test, is adopted to detect leakage points of micro leakage occurring in heat exchange of the graphite tubes. The utility model discloses little seepage repair method of graphite shell and tube heat exchanger and device are not suitable for the repair work that heat exchange tube fracture etc. seriously revealed. And marking leakage points at the positions of the graphite heat exchange tube or the bonding seam between the graphite heat exchange tube and the tube plate, and the like, and correspondingly marking the two ends of the same graphite heat exchange tube at the positions of the leakage points.
S2: the hollow tube single-head bolt 22 and the elastomer sleeve 23 of the heat exchange tube lower end sealing joint component 4 and the heat exchange tube upper end sealing joint component 6 are respectively inserted into the tube plate hole ends of the graphite tube nest heat exchange corresponding to the two ends of the same marked graphite heat exchange tube at the position needing maintenance.
S3: and closing all valves, opening a first valve of a feed inlet at the upper end of the high-level resin storage tank 1, and filling resin into the high-level resin storage tank 1. The utility model discloses a fill dress impregnating resin is thermosetting phenol-formaldehyde resin F2130 or other thermosetting resin, and the graphite impregnating resin who specifically uses when specifically being with making graphite tubulation heat exchanger is same type and model to guarantee the heat exchanger performance after the restoration, especially keep the same level before corrosion-resistant, temperature resistant and the compressive property and the restoration.
S4: further opening a third valve 3 on the resin filling pipeline 2, observing the flowing condition of the resin liquid through a second glass liquid level meter 18 on the heat exchange tube lower end sealing joint assembly 4, sequentially opening a fourth valve 5 on the heat exchange tube lower end sealing joint assembly 4, observing the resin liquid level through a first glass liquid level meter 17 on the heat exchange tube upper end sealing joint assembly 6 by a sixth valve 7 on the heat exchange tube upper end sealing joint assembly 6, and immediately closing the third valve 3 when the resin liquid level reaches the first glass liquid level meter 17. Attention should be paid to the whole process: when the liquid level can not rise, the air release valve 16 on the compressed air pipeline 8 can be slightly opened to discharge the air stored in the pipeline, the liquid column pressure is balanced, the liquid level slowly rises until the liquid level rises to the first glass liquid level meter 17, and the air release valve 16 is closed while the third valve 3 is closed.
S5: opening a seventh valve 10 on the compressed air pipeline 8, starting an air compressor 9, monitoring the pressure through a pressure gauge 26, controlling the system pressure to slowly and gradually rise, gradually increasing the pressure within 0.2-1.2MPa (not exceeding the design pressure of the heat exchanger), and observing marked micro-leakage points on the shell side of the heat exchanger until all the micro-leakage points have resin overflow. If the resin overflow amount is small or no overflow condition is observed, the pressure is maintained for 2-6 hours according to the design pressure of the heat exchanger, and the resin gradually permeates into micro-leakage pores.
S6: after the above operations are completed, the third valve 3 is opened, the resin is compressed back into the high-level resin storage tank 1 by using compressed air, the third valve 3 on the resin filling pipeline 2 is closed, the seventh valve 10 on the compressed air pipeline 8 is closed, the air compressor 9 is stopped, and the emptying valve 16 is opened. And finishing the resin impregnation filling process of the micro-leakage pores of the graphite tubular heat exchanger.
S7: and then, opening an eighth valve 14 and a fifth valve 12 on the hot air circulation pipeline 13 in sequence, starting the pipeline fan 11, operating for 1-2 minutes, starting the electric heating pipe 19, controlling the emptying valve 16 to be in a slightly-opened state, and keeping the system pressure of the hot air circulation pipeline 13 at normal pressure all the time. The numerical values of the first thermometer 27 and the second thermometer 28 are gradually close to each other and are increased, the highest temperature of the first thermometer 27 is controlled to be less than or equal to 180 ℃, the highest temperature of the second thermometer 28 is controlled to be less than or equal to 150 ℃, and the temperature of the second thermometer 28 is maintained to be more than or equal to 120 ℃ for 2 hours. And finally, impregnating the resin filled in the micro-leakage pores of the graphite tubular heat exchanger and the resin attached to the inner tube wall to finish the thermosetting process, blocking the micro-leakage pores and forming an anti-permeation film on the inner wall of the graphite heat exchange tube. And the defect of the counter bore which is formed with the micro pit but is not completely penetrated is filled and repaired, the defect is prevented, and the service life of the heat exchanger can be greatly prolonged by maintaining once.
Claims (8)
1. Little seepage prosthetic devices of graphite shell and tube heat exchanger, its characterized in that: the high-position resin storage tank comprises a high-position resin storage tank (1), an outlet of the high-position resin storage tank (1) is connected with a resin filling pipeline (2), a third valve (3) is arranged on the resin filling pipeline (2), the other end of the resin filling pipeline (2) is communicated with an inlet end of a heat exchange tube lower end sealing joint component (4), a fourth valve (5) is arranged on the heat exchange tube lower end sealing joint component (4), the high-position resin storage tank further comprises a heat exchange tube upper end sealing joint component (6), a sixth valve (7) is arranged on the heat exchange tube upper end sealing joint component (6), an inlet end of the heat exchange tube upper end sealing joint component (6) is connected with an air compressor (9) through a compressed air pipeline (8), a seventh valve (10) is arranged on the compressed air pipeline (8), an inlet end of the heat exchange tube lower end sealing joint component (4) is further connected with an inlet end of a pipeline fan (11) through a pipeline, a fifth valve (12) is arranged on the pipeline, an outlet end of the pipeline fan (11) is communicated with the heat exchange tube upper end sealing joint component (6) through a hot air circulation pipeline (13), and an eighth heating device (14) is arranged on the hot air circulation pipeline.
2. The graphite tube heat exchanger microleakage prosthetic devices of claim 1, characterized in that: the inlet end of the heat exchange tube upper end sealing joint assembly (6) is also connected with a vent pipe (15), and a vent valve (16) is arranged on the vent pipe (15).
3. The graphite tube heat exchanger microleakage prosthetic devices of claim 1, characterized in that: a first glass liquid level meter (17) is arranged on the inlet end pipeline of the sixth valve (7); and a second glass liquid level meter (18) is arranged on the inlet end pipeline of the fourth valve (5).
4. The microleakage repair device of a graphite shell and tube heat exchanger of claim 3, characterized in that: the heat exchange tube lower end sealing joint assembly (4) and the heat exchange tube upper end sealing joint assembly (6) are identical in structure and comprise 1 three-way pipe (20), wherein 1 pipe of the three-way pipe (20) is sequentially connected with a glass liquid level meter, a valve and a connecting pipe (21), the connecting pipe (21) extends into a hollow tube single-head bolt (22), and an elastomer sleeve (23), a retainer ring (24) and a nut (25) are sequentially sleeved on the hollow tube single-head bolt (22).
5. The graphite tube heat exchanger microleakage prosthetic devices of claim 4, characterized in that: the heat exchange tube lower end sealing joint assembly (4) and the heat exchange tube upper end sealing joint assembly (6) are both provided with a plurality of sealing joint assemblies, and the sealing joint assemblies are arranged in the same number.
6. The graphite tube heat exchanger microleakage prosthetic devices of claim 1, characterized in that: the air heating device is an electric heating pipe (19), one end of the electric heating pipe (19) is communicated with the hot air circulation pipeline (13), and the other end of the electric heating pipe is communicated with the inlet end of the sealing joint component (6) at the upper end of the heat exchange pipe through a pipeline.
7. The graphite shell and tube heat exchanger microleakage prosthetic devices of claim 1, characterized in that: and pressure gauges (26) are arranged on the compressed air pipeline (8) and the hot air circulating pipeline (13).
8. The graphite shell and tube heat exchanger microleakage prosthetic devices of claim 1, characterized in that: a first thermometer (27) is arranged on the hot air circulation pipeline (13), and a second thermometer (28) is arranged on a pipeline, connected with the pipeline fan (11), of the sealing joint assembly (4) at the lower end of the heat exchange pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221448834.5U CN217654366U (en) | 2022-06-10 | 2022-06-10 | Graphite shell and tube heat exchanger microleakage prosthetic devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221448834.5U CN217654366U (en) | 2022-06-10 | 2022-06-10 | Graphite shell and tube heat exchanger microleakage prosthetic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217654366U true CN217654366U (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221448834.5U Active CN217654366U (en) | 2022-06-10 | 2022-06-10 | Graphite shell and tube heat exchanger microleakage prosthetic devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217654366U (en) |
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2022
- 2022-06-10 CN CN202221448834.5U patent/CN217654366U/en active Active
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