CN220026144U - Indirect heat pump rectifying device - Google Patents
Indirect heat pump rectifying device Download PDFInfo
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- CN220026144U CN220026144U CN202320792386.9U CN202320792386U CN220026144U CN 220026144 U CN220026144 U CN 220026144U CN 202320792386 U CN202320792386 U CN 202320792386U CN 220026144 U CN220026144 U CN 220026144U
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- heat pump
- rectifying
- tower body
- regulating valve
- rectifying tower
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- 239000002994 raw material Substances 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims description 42
- 239000012071 phase Substances 0.000 claims description 32
- 239000007791 liquid phase Substances 0.000 claims description 14
- 238000010992 reflux Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003518 caustics Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 30
- 239000007788 liquid Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000000926 separation method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to an indirect heat pump rectifying device; the device comprises a rectifying tower body and a tower bottom reboiler, wherein a raw material inlet pipeline is arranged at the side part of the rectifying tower body, a gas phase outlet is arranged at the top of the rectifying tower body, the gas phase outlet is respectively connected with a first reflow mouth and a first subsequent working section at the upper part of the rectifying tower body through a heat pump cooler of a circulating heat pump unit, the circulating heat pump unit comprises a heat pump cooler, an outlet of the heat pump cooler is connected with a hot side channel of the tower bottom reboiler through a compressor, and a hot side channel outlet of the tower bottom reboiler is connected with an inlet of the heat pump cooler; the method has the advantages of saving steam, reducing energy consumption, being wide in application range, protecting the compressor especially when corrosive substances are contained in gas phase, prolonging the service life of corresponding equipment and being convenient to adjust.
Description
Technical Field
The utility model relates to the technical field of accessory parts of rectifying towers, in particular to an indirect heat pump rectifying device.
Background
In the industries of fertilizer production, pharmacy, petrochemical industry, coal chemical industry and the like, a rectifying tower is often used for rectifying separation, a large amount of steam is required to be consumed in the rectifying process of a conventional rectifying tower, and researches show that in the conventional rectifying operation process, only about 5-20% of energy in total steam consumption is applied to component separation, and the rest about 80-95% is taken away by the separated components, so that great waste of heat is caused.
Disclosure of Invention
The utility model aims to provide an indirect heat pump rectifying device to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides an indirect heat pump rectifying device, includes rectifying column body and tower bottom reboiler, and the lateral part of rectifying column body is equipped with raw materials import pipeline, the top of rectifying column body is equipped with the gaseous phase export, and the gaseous phase export links to each other with the first backward flow mouth and the first follow-up workshop section on rectifying column body upper portion respectively through the heat pump cooler of circulation heat pump unit, circulation heat pump unit includes the heat pump cooler, and the export of heat pump cooler links to each other with the hot side passageway of tower bottom reboiler through the compressor, and the hot side passageway export of tower bottom reboiler links to each other with the import of heat pump cooler.
The beneficial effects of the utility model are as follows: the utility model adopts a circulating heat pump unit to exchange heat with the gas phase from the gas phase outlet, and the medium in the circulating heat pump unit is pressurized and heated after the heat exchange to exchange heat with the tower bottom reboiler, so that the purpose of maintaining the normal operation of the rectifying tower body by using the gas phase in the gas phase outlet of the rectifying tower body as an indirect heat source is realized.
As a further preferable mode of the technical scheme, a liquid phase outlet is arranged at the bottom of the rectifying tower body and is respectively connected with a second subsequent working section and a cold side channel of the tower bottom reboiler, and the cold side channel outlet of the tower bottom reboiler is connected with a second reflux port at the lower part of the rectifying tower body.
As a further preferable mode of the technical scheme, a temperature sensor is arranged at the inner lower part of the rectifying tower body, and the temperature sensor is connected with a signal input end of the PLC control system;
a first regulating valve is arranged on a pipeline between the liquid phase outlet and a second subsequent working section, and a second regulating valve is arranged on a pipeline between the liquid phase outlet and a cold side channel of the tower bottom reboiler;
the signal output end of the PLC control system is respectively connected with the first regulating valve and the second regulating valve.
As a further preferable mode of the technical scheme, a third regulating valve is arranged between the outlet of the hot side channel of the tower bottom reboiler and the inlet of the heat pump cooler.
As a further preferable mode of the technical scheme, a supplementary circulation medium pipeline with a fourth regulating valve is arranged between the third regulating valve and the inlet of the heat pump cooler.
As a further preferable mode of the technical scheme, the rectifying tower body is a plate rectifying tower or a packed rectifying tower.
As a further preferred aspect of the present utility model, the compressor is a screw compressor.
According to the indirect heat pump rectifying device manufactured according to the scheme, the gas phase heat and the circulating working medium in the gas phase outlet of the rectifying tower body are used for heat exchange, the screw compressor is used for carrying out pressurization and temperature increase on the circulating well known device to carry out heat exchange on the tower bottom reboiler, so that the purpose of maintaining the operation of the rectifying tower body for rectification separation is achieved, furthermore, the gas phase in the gas phase outlet of the rectifying tower body is used for carrying out heat exchange with the medium of the circulating heat pump unit and then carrying out heat exchange with the tower bottom reboiler, and the compressor in the circulating heat pump unit can be effectively protected in an indirect heat exchange mode, so that the purpose of prolonging the service life of the circulating heat pump unit is achieved; the method has the characteristics of wide application range and steam consumption saving; the temperature sensor is used for detecting the temperature of the bottom of the rectifying tower body so as to ensure that the temperature of the bottom liquid in the rectifying tower body is at a preset threshold value and ensure the stable operation of the rectifying tower body; when the temperature of the tower bottom liquid exceeds a preset threshold value, the opening degree of the first regulating valve and the opening degree of the second regulating valve can be regulated so as to realize the aim of regulating the load of the rectifying tower body; the method has the advantages of saving steam, reducing energy consumption, being wide in application range, protecting the compressor especially when corrosive substances are contained in gas phase, prolonging the service life of corresponding equipment and being convenient to adjust.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic diagram of temperature control of the bottom liquid in the rectifying column body according to the present utility model.
In the figure: 1. a rectifying column body; 2. a compressor; 3. a bottom reboiler; 4. a gas phase outlet; 5. a heat pump cooler; 6. a raw material inlet pipe; 7. a first return port; 8. a first subsequent section; 9. a liquid phase outlet; 10. a second subsequent section; 11. a second return port; 12. a temperature sensor; 13. a PLC control system; 14. a first regulating valve; 15. a second regulating valve; 16. a third regulating valve; 17. and a fourth regulating valve.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to fig. 1, an indirect heat pump rectifying device comprises a rectifying tower body 1 and a tower bottom reboiler 3, wherein the side part of the rectifying tower body 1 is provided with a raw material inlet pipeline 6, the top of the rectifying tower body 1 is provided with a gas phase outlet 4, the gas phase outlet 4 is respectively connected with a first reflux port 7 and a first subsequent working section 8 at the upper part of the rectifying tower body 1 through a heat pump cooler 5 of a circulating heat pump unit,
the circulating heat pump unit comprises a heat pump cooler 5, an outlet of the heat pump cooler 5 is connected with a hot side channel of the tower bottom reboiler 3 through the compressor 2, and an outlet of the hot side channel of the tower bottom reboiler 3 is connected with an inlet of the heat pump cooler 5. The utility model has wide application range, especially can treat the condition that the gas phase contains corrosive substances, and can effectively save steam consumption in the use process, wherein the gas phase of the gas phase outlet 4 in the rectifying tower body 1 indirectly exchanges heat with the tower bottom reboiler 3 through the circulating heat pump unit, the circulating heat pump unit is in closed-loop operation, and the medium in the operation can be steam; the vapor exchanges heat with the gas phase in the gas phase outlet 4 through the heat pump cooler 5, and exchanges heat with the medium in the cold side channel of the tower bottom reboiler 3 after being pressurized through the compressor 2 after the heat exchange, and the medium in the cold side channel provides heat for the rectifying tower body 1 after the heat exchange so as to meet the continuous and stable operation of the rectifying tower body 1.
Further, a liquid phase outlet 9 is arranged at the bottom of the rectifying tower body 1, the liquid phase outlet is respectively connected with a second subsequent working section 10 and a cold side channel of the tower bottom reboiler 3, and the cold side channel outlet of the tower bottom reboiler 3 is connected with a second reflux port 11 at the lower part of the rectifying tower body 1. The bottom liquid of the rectifying tower body 1 is discharged through the liquid phase outlet 9, one part of the bottom liquid enters the second follow-up working section 10, and the other part of the bottom liquid enters a cold side channel of the tower bottom reboiler 3 to be used as a cold side channel medium for circulating operation.
Further, referring to fig. 2, a temperature sensor 12 is disposed at the inner lower portion of the rectifying tower body 1, and the temperature sensor 12 is connected to a signal input end of the PLC control system 13;
a first regulating valve 14 is arranged on a pipeline between the liquid phase outlet 9 and the second subsequent working section 10, and a second regulating valve 15 is arranged on a pipeline between the liquid phase outlet 9 and a cold side channel of the tower bottom reboiler 3;
the signal output end of the PLC control system 13 is respectively connected with a first regulating valve 14 and a second regulating valve 15. According to the utility model, the temperature condition of the bottom liquid of the rectifying tower body 1 is detected by the temperature sensor 12, so that the stable operation of the rectifying tower body 1 is ensured, and the two materials are thoroughly separated, and when the temperature of the bottom liquid of the rectifying tower body 1 fluctuates and exceeds a preset threshold value, the opening of the first regulating valve 14 and the second regulating valve 15 can be controlled by the PLC control system 13, so that the purposes of regulating the operation load of the rectifying tower body 1 and maintaining the normal operation are achieved.
Further, a third regulating valve 16 is arranged between the hot side channel outlet of the tower bottom reboiler 3 and the inlet of the heat pump cooler 5. The third regulating valve 16 is a pressure reducing valve, and is used for reducing pressure of the medium subjected to heat exchange in the circulating heat pump unit so as to realize circulating operation of the circulating heat pump unit.
Further, a supplementary circulation medium pipe with a fourth regulating valve 17 is arranged between the third regulating valve 16 and the inlet of the heat pump cooler 5. The purpose of supplementing the closed-loop running circulation heat pump unit with corresponding media can be achieved by arranging a pipeline with a fourth regulating valve 17.
Further, the rectifying tower body 1 is a plate rectifying tower or a packed rectifying tower.
Further, the compressor 2 is a screw compressor.
The working principle of the utility model is as follows: raw materials to be rectified enter the rectifying tower body 1 through a raw material inlet pipeline 6 to be rectified, gas phase generated in the rectifying process is discharged through a gas phase outlet 4, heat exchange and cooling are carried out on the raw materials and the heat pump cooler 5 of the circulating heat pump unit in the discharging process, one part of the raw materials after heat exchange and cooling is used as reflux liquid to enter the rectifying tower body 1 again to be rectified through a first reflux port 7, and the other part of the raw materials enter a first follow-up working section 8; the medium in the circulating heat pump unit is heated by the heat pump cooler 5 and then enters the compressor 2 to be pressurized for continuous heating, the heated medium enters a hot side channel of the tower bottom reboiler 3 to exchange heat with the medium of a cold side channel of the tower bottom reboiler 3, and the medium in the cold side channel supplies heat to the rectifying tower body 1 after exchanging heat so as to meet the continuous and stable operation of the rectifying tower body 1 and achieve the aim of saving steam; the bottom liquid of the rectifying tower body 1 is discharged through a liquid phase outlet 9, one part of the bottom liquid enters a second subsequent working section 10, and the other part of the bottom liquid enters a cold side channel of the tower bottom reboiler 3 to be used as a cold side channel medium for circulating operation; in the running process of the rectifying tower body 1, the temperature condition of the bottom liquid of the rectifying tower body 1 is detected through the temperature sensor 12 so as to ensure the stable running of the rectifying tower body 1 and realize the thorough separation of two materials, and when the temperature of the bottom liquid of the rectifying tower body 1 fluctuates and exceeds a preset threshold value, the opening of the first regulating valve 14 and the second regulating valve 15 can be controlled through the PLC control system 13 so as to achieve the purposes of regulating the running load of the rectifying tower body 1 and maintaining normal running. Further, the third regulating valve 16 controls the operation of the circulation heat pump unit, and the fourth regulating valve 17 controls the timing of medium replenishment of the circulation heat pump unit.
The utility model will now be further described in connection with specific embodiments for a clearer explanation thereof. Specific examples are as follows:
example 1
Taking the case that the mixture of methanol and water is separated by the rectifying tower body 1, the mixture of methanol and water enters the rectifying tower body 1 through the raw material inlet pipeline 6 for rectification, the material components in the raw material inlet pipeline 6 are 50-80% of methanol (mass fraction, the same applies below), the operating pressure in the rectifying process is 0.2-0.4MPaG, the tower top temperature is 90-130 ℃, the tower bottom temperature is 120-160 ℃, and the reflux ratio is 2.0-6.0; the gas phase generated in the rectification process is discharged through a gas phase outlet 4, the gas phase in the discharge process indirectly exchanges heat with a tower bottom reboiler 3 through a circulating heat pump unit, and part of the gas phase after the gas phase exchanges heat is used as reflux liquid to enter the rectification tower body 1 again for rectification through a first reflux port 7, and the other part of the gas phase enters a first follow-up working section 8; the medium in the circulating heat pump unit is heated by the heat pump cooler 5 and then enters the compressor 2 for pressurizing and continuously heating, the temperature of the outlet medium of the compressor 2 is 190-230 ℃, the medium entering the hot side channel of the tower bottom reboiler 3 through the medium of the compressor 2 exchanges heat with the medium of the cold side channel of the tower bottom reboiler 3, and the medium in the cold side channel provides heat for the rectifying tower body 1 after exchanging heat, so that the temperature of the tower bottom liquid of the rectifying tower body 1 is maintained within the range of 120-160 ℃; the medium in the heat-exchanged circulating heat pump unit is decompressed by a third regulating valve 16 and then circulates; the temperature sensor 12 detects that the temperature of the bottom liquid of the rectifying tower body 1 is in the interval range of 120-160 ℃ in the running process, and if the temperature exceeds the interval temperature range, the PLC control system 13 controls the opening of the first regulating valve 14 and the second regulating valve 15 to enable the temperature of the bottom liquid to be continuously maintained in the interval range. The method can save the use of steam, but the pressurization of the medium by using the compressor can consume electric quantity, and the calculation is performed by the rectification worker, so that compared with the original technology using steam rectification, the method can reduce the energy consumption by 40% -70%, thereby realizing the purposes of energy conservation and consumption reduction. It should be noted that: the tower bottom reboiler 3 of the utility model can be a thermosiphon reboiler, and a vertical thermosiphon reboiler is preferably selected.
Example 2
The rectification in this example was carried out in the same manner as in example 1, but the gas phase at the gas phase outlet 4 contained elemental sulfur; the gas phase of the gas phase outlet 4 indirectly exchanges heat with the tower bottom reboiler 3 through the circulating heat pump unit, so that the gas phase is not contacted with the compressor 2 in the circulating heat pump unit, and the purposes of protecting the compressor 2 and prolonging the service life of the compressor are achieved.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an indirect heat pump rectifying device, includes rectifying column body (1) and tower bottom reboiler (3), and the lateral part of rectifying column body (1) is equipped with raw materials import pipeline (6), its characterized in that: the top of the rectifying tower body (1) is provided with a gas phase outlet (4), the gas phase outlet (4) is respectively connected with a first reflux port (7) and a first subsequent working section (8) at the upper part of the rectifying tower body (1) through a heat pump cooler (5) of a circulating heat pump unit,
the circulating heat pump unit comprises a heat pump cooler (5), an outlet of the heat pump cooler (5) is connected with a hot side channel of the tower bottom reboiler (3) through a compressor (2), and an outlet of the hot side channel of the tower bottom reboiler (3) is connected with an inlet of the heat pump cooler (5).
2. An indirect heat pump rectifying device according to claim 1, characterized in that: the bottom of the rectifying tower body (1) is provided with a liquid phase outlet (9), the liquid phase outlet is respectively connected with a second follow-up working section (10) and a cold side channel of the tower bottom reboiler (3), and the cold side channel outlet of the tower bottom reboiler (3) is connected with a second reflux port (11) at the lower part of the rectifying tower body (1).
3. An indirect heat pump rectifying device according to claim 2, characterized in that: the inner lower part of the rectifying tower body (1) is provided with a temperature sensor (12), and the temperature sensor (12) is connected with a signal input end of a PLC control system (13);
a first regulating valve (14) is arranged on a pipeline between the liquid phase outlet (9) and the second subsequent working section (10), and a second regulating valve (15) is arranged on a pipeline between the liquid phase outlet (9) and a cold side channel of the tower bottom reboiler (3);
the signal output end of the PLC control system (13) is respectively connected with the first regulating valve (14) and the second regulating valve (15).
4. An indirect heat pump rectifying device according to claim 1, characterized in that: and a third regulating valve (16) is arranged between the outlet of the hot side channel of the tower bottom reboiler (3) and the inlet of the heat pump cooler (5).
5. An indirect heat pump rectifying device according to claim 4, characterized in that: a supplementary circulation medium pipeline with a fourth regulating valve (17) is arranged between the third regulating valve (16) and the inlet of the heat pump cooler (5).
6. An indirect heat pump rectifying device according to any one of claims 1 to 5, characterized in that: the rectifying tower body (1) is a plate rectifying tower or a packed rectifying tower.
7. An indirect heat pump rectifying device according to any one of claims 1 to 5, characterized in that: the compressor (2) is a screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320792386.9U CN220026144U (en) | 2023-04-10 | 2023-04-10 | Indirect heat pump rectifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320792386.9U CN220026144U (en) | 2023-04-10 | 2023-04-10 | Indirect heat pump rectifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220026144U true CN220026144U (en) | 2023-11-17 |
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ID=88738747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320792386.9U Active CN220026144U (en) | 2023-04-10 | 2023-04-10 | Indirect heat pump rectifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220026144U (en) |
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2023
- 2023-04-10 CN CN202320792386.9U patent/CN220026144U/en active Active
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