CN214746759U - Multi-demand coupling rectification refrigeration system - Google Patents
Multi-demand coupling rectification refrigeration system Download PDFInfo
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- CN214746759U CN214746759U CN202120612611.7U CN202120612611U CN214746759U CN 214746759 U CN214746759 U CN 214746759U CN 202120612611 U CN202120612611 U CN 202120612611U CN 214746759 U CN214746759 U CN 214746759U
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Abstract
The utility model is suitable for a low temperature refrigeration technology field discloses many demands coupling rectification refrigerating system, including compressor, one-level heat exchanger, second grade heat exchanger, expander, cooling heat exchanger, rewarming heat exchanger, adopts the cold flow between the second grade heat exchanger to draw forth, realizes cold volume demand one through cooling heat exchanger heat transfer, the temperature that cold shield department required promptly; the cold flow is divided into two flows, one flow provides refrigerating capacity for a cold screen, the other flow enters a reboiler to realize the function of a low-temperature heater, the heating capacity is provided for reboiling liquid in the rectifying tower, and the fluid which is provided with the heating capacity flows back to the low-pressure side of the secondary heat exchanger and finally flows back to the compressor; the high-pressure flow flowing out of the high-pressure side of the secondary heat exchanger is subjected to pressure reduction and temperature reduction after flowing through the expansion machine, and then flows into the condenser to provide refrigerating capacity; the refrigerating system can simultaneously meet the cold quantity requirements of various temperature areas.
Description
Technical Field
The utility model relates to a low temperature refrigeration technology field especially relates to a many demands coupling rectification refrigerating system.
Background
The low-temperature refrigeration system has important application in various fields such as aerospace, nuclear energy utilization, medical diagnosis and treatment, high-energy physics and the like. Wherein, the low-temperature rectification is taken as an important way for industrially obtaining pure gas and has wide application in the field of gas obtaining and purifying. The hydrogen is used as clean energy and has important application prospect in the future.
A condenser and a reboiler are arranged inside the rectifying tower, and a cold screen is arranged outside the rectifying tower to block heat radiation and heat conduction between the inside and the outside. The condenser in the rectifying tower provides cold energy for the gas-phase mixed working medium in the tower, liquefies the high-boiling point working medium, and realizes gas-liquid separation of different working media. And a reboiler in the rectifying tower heats the liquid-phase mixed working medium in the tower, and the working medium with low boiling point is vaporized to realize separation. The existing condenser and cold screen use refrigerator to provide cold quantity, and the reboiler uses heater to realize heating. The adoption of the heater at low temperature means that the cold energy at low temperature is lost, and the efficiency is low from the aspect of energy utilization efficiency. Meanwhile, the existing rectification system is often applied to the air separation field such as nitrogen-oxygen separation, and the like, and the rectification system with lower temperature such as 20K temperature zone is less. The 20K temperature zone rectification system has wide application, so that a low-temperature refrigerator in a liquid hydrogen temperature zone is required to provide cold energy, and the realization of cold energy supply of a condenser and a cold screen is very important.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a many demands coupling rectification refrigerating system, it aims at solving the technical problem that current refrigerating system can not satisfy the cold volume demand of multiple warm area simultaneously.
In order to achieve the above purpose, the utility model provides a scheme is:
a multi-demand coupling rectification refrigeration system comprises a compressor, a primary heat exchanger, a secondary heat exchanger, an expander, a cooling heat exchanger, a rewarming heat exchanger, a first branch pipe, a second branch pipe, a third branch pipe, a fourth branch pipe, a fifth branch pipe and a sixth branch pipe; a high-pressure side inlet of the primary heat exchanger is connected with an outlet of the compressor, a high-pressure side outlet of the primary heat exchanger is connected with a high-pressure side inlet of the secondary heat exchanger through the first branch pipe, a high-pressure side inlet of the secondary heat exchanger is connected with an inlet of the expander, an outlet of the expander is configured to be connected with an inlet of a condenser, a low-pressure side inlet of the cooling heat exchanger is configured to be connected with an outlet of the condenser through the third branch pipe, a low-pressure side outlet of the cooling heat exchanger is connected with a cold-side inlet of the rewarming heat exchanger, and a cold-side outlet of the rewarming heat exchanger is connected with the compressor; a low-pressure side inlet of the secondary heat exchanger is connected with an outlet of the condenser through the fourth branch pipe, a low-pressure side outlet of the secondary heat exchanger is connected with a low-pressure side inlet of the primary heat exchanger, and a low-pressure side outlet of the primary heat exchanger is connected with an inlet of the compressor; a high-pressure side inlet of the primary heat exchanger is connected with a high-pressure side inlet of the cooling heat exchanger through the second branch pipe, a high-pressure side outlet of the cooling heat exchanger is configured to be connected with an inlet of the cold screen through the fifth branch pipe, a hot side inlet of the rewarming heat exchanger is configured to be connected with an outlet of the cold screen, and a hot side outlet of the rewarming heat exchanger is connected with the compressor; the high-pressure side outlet of the temperature-reducing heat exchanger is configured to be connected with the inlet of a reboiler through the sixth branch pipe, and the outlet of the reboiler is connected with the fourth branch pipe.
Preferably, a first low-temperature valve and a second low-temperature valve are sequentially arranged between the primary heat exchanger and the cooling heat exchanger.
Preferably, a sixth low-temperature valve is arranged between the temperature-reducing heat exchanger and the reboiler.
Preferably, a third low-temperature valve is arranged between the cold side outlet of the rewarming heat exchanger and the compressor, and a normal-temperature valve is arranged between the hot side outlet of the rewarming heat exchanger and the compressor.
Preferably, a fourth cryogenic valve is disposed between the secondary heat exchanger and the expander.
Preferably, a fifth low temperature valve is provided between the expander and the condenser.
Preferably, a seventh low-temperature valve is arranged between the secondary heat exchanger and the condenser.
Preferably, a first heater is arranged between the secondary heat exchanger and the reboiler.
Preferably, a second heater is arranged between the rewarming heat exchanger and the cold shield.
Preferably, a third heater is arranged between the outlet of the hot side of the rewarming heat exchanger and the compressor.
The utility model provides a many demands coupling rectification refrigerating system can provide cold volume, provide the heat for the inside reboiler of rectifying column for the inside condenser of rectifying column to and for the outer cold screen of rectifying column provides cold volume, can realize that 4K to 120K's gas rectification and segregation separate, namely, can satisfy the cold volume demand of multiple warm area simultaneously. Moreover, the refrigeration system integrates multiple temperature areas into one refrigeration system on the premise of meeting multiple requirements, so that high integration and high stability are ensured, and the complexity of the refrigeration system is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multi-demand coupled rectification refrigeration system according to an embodiment of the present invention.
The reference numbers illustrate:
101. a compressor; 201. a primary heat exchanger; 202. a secondary heat exchanger; 203. a rewarming heat exchanger; 204. a cooling heat exchanger; 300. a first cryogenic valve; 301. a second cryogenic valve; 302. a third cryogenic valve; 303. a fourth low temperature valve; 304. a fifth low temperature valve; 305. a sixth cryogenic valve; 306. a seventh low temperature valve; 307. a normal temperature valve; 401. an expander; 501. cooling the screen; 502. a condenser; 503. a reboiler; 601. a first heater; 602. a second heater; 603. and a third heater.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, it is the utility model discloses a many demands coupling rectification refrigerating system of an embodiment, this refrigerating system can be applied to rectification refrigeration circulation such as helium neon rectification and hydrogen neon rectification, and this refrigerating system is used for providing cold volume, provides the heat for the reboiler of rectifying column inside for the inside condenser of rectifying column to and provide cold volume for the outer cold screen of rectifying column, can realize 4K to 120K's gas rectification and segregation separation.
Referring to fig. 1, the multi-demand coupled rectification refrigeration system according to the embodiment of the present invention includes a compressor 101, a first-stage heat exchanger 201, a second-stage heat exchanger 202, an expander 401, a temperature-reducing heat exchanger 204, and a rewarming heat exchanger 203, the high-pressure side inlet of the first-stage heat exchanger 201 is connected with the inlet of the compressor 101, the high-pressure side outlet of the first-stage heat exchanger 201 is connected with the high-pressure side inlet of the second-stage heat exchanger 202 through the first branch pipe, the high-pressure side inlet of the second-stage heat exchanger 202 is connected with the inlet of the expander 401, the outlet of the expander 401 is connected with the inlet of the condenser 502, the outlet of the condenser 502 is connected with the low-pressure side inlet of the cooling heat exchanger 204 through the third branch pipe, the low-pressure side outlet of the cooling heat exchanger 204 is connected with the cold-side inlet of the rewarming heat exchanger 203, and the cold-side outlet of the rewarming heat exchanger 203 is connected with the inlet of the compressor 101; an outlet of the condenser 502 is connected with a low-pressure side inlet of the secondary heat exchanger 202 through a fourth branch pipe, a low-pressure side outlet of the secondary heat exchanger 202 is connected with a low-pressure side inlet of the primary heat exchanger 201, and a low-pressure side outlet of the primary heat exchanger 201 is connected with an inlet of the compressor 101; a high-pressure side inlet of the primary heat exchanger 201 is connected with a high-pressure side inlet of the cooling heat exchanger 204 through a second branch pipe, a high-pressure side outlet of the cooling heat exchanger 204 is connected with an inlet of the cold shield 501 through a fifth branch pipe, an outlet of the cold shield 501 is connected with a hot side inlet of the rewarming heat exchanger 203, and a hot side outlet of the rewarming heat exchanger 203 is connected with an inlet of the compressor 101; the high-pressure side outlet of the temperature-reducing heat exchanger 204 is connected with the inlet of the reboiler 503 through a sixth branch pipe, and the outlet of the reboiler 503 is connected with a fourth branch pipe.
Preferably, the heat exchange medium of the primary heat exchanger 201 is liquid nitrogen, and the liquid nitrogen is used as the heat exchange medium, so that the heat exchange effect can be improved.
The compressor 101 compresses the refrigerant by the refrigerant compressor 101, flows into the first-stage heat exchanger 201, is pre-cooled by backflow and liquid nitrogen, and then flows out from the high-pressure side outlet. The pre-cooled high-pressure refrigerant is divided into two streams at the high-pressure side outlet of the primary heat exchanger 201, most of the high-pressure refrigerant flows through the secondary heat exchanger 202 and the expander 401 from the first branch pipe to realize cooling, and the cooled refrigerant flows into the condenser 502 to provide cooling capacity. The rest of the high-pressure refrigerant flows into the cooling heat exchanger 204 from the second branch pipe to realize cooling, the high-pressure side outlet of the cooling heat exchanger 204 is divided into two streams of fluid, one stream of fluid flows into the cold shield 501 from the fifth branch pipe to realize the supply of the cooling capacity of the system, and then flows through the rewarming heat exchanger 203 to realize rewarming and then flows back to the compressor 101. The other fluid which is separated from the high-pressure side outlet of the cooling heat exchanger 204 flows into the reboiler 503 from the sixth branch pipe, so that the reboiling heating of the rectification working medium is realized. The high-pressure refrigerant flowing through the condenser 502 is divided into two streams at the outlet of the condenser 502, one stream flows through the temperature reduction heat exchanger 204 from the third branch pipe for heat exchange, then flows into the rewarming heat exchanger 203 for rewarming, and then flows back to the compressor 101, the other stream flows out from the fourth branch pipe and is mixed with the refrigerant flowing out from the outlet of the reboiler 503, and after mixing, the refrigerant flows back to the compressor 101 after exchanging heat between the secondary heat exchanger 202 and the primary heat exchanger 201.
The utility model discloses many demands coupling rectification refrigerating system can satisfy the cold volume demand of multiple warm area simultaneously. Moreover, the refrigeration system integrates multiple temperature areas into one refrigeration system on the premise of meeting multiple requirements, so that high integration and high stability are ensured, and the complexity of the refrigeration system is avoided.
Preferably, a first low-temperature valve 300 and a second low-temperature valve 301 are sequentially arranged between the primary heat exchanger 201 and the cooling heat exchanger 204. The flow of the precooled high-pressure refrigerant entering the cooling heat exchanger 204 is independently controlled by the refrigeration system through the arrangement of the first low-temperature valve 300 and the second low-temperature valve 301, so that the refrigerating capacity entering the cold screen 501 is controlled. The first low-temperature valve 300 is a switch valve, the second low-temperature valve 301 is a regulating valve, the two valves are used together to realize effective separation of a cold box part of the refrigerator, and meanwhile, accurate regulation of flow is guaranteed.
Further, a sixth low-temperature valve 305 is arranged between the temperature-reducing heat exchanger 204 and the reboiler 503, the heating amount of the refrigeration system entering the reboiler 503 is independently controlled by arranging the sixth low-temperature valve 305, and the heating amount can be adjusted according to the temperature and the flow before and after the reboiler 503.
Preferably, a fourth low-temperature valve 303 is arranged between the secondary heat exchanger 202 and the expander 401, and the refrigeration system independently controls the flow of the refrigerant entering the expander 401 by arranging the fourth low-temperature valve 303.
Preferably, a fifth low-temperature valve 304 is arranged between the expander 401 and the condenser 502, the refrigeration system independently controls the cooling capacity entering the condenser 502 by arranging the fifth low-temperature valve 304, and the cooling capacity can be adjusted according to the temperature and the flow of the refrigerant.
Preferably, a seventh low temperature valve 306 is disposed between the condenser 502 and the secondary heat exchanger 202, and the refrigeration system independently controls the amount of reflux entering the secondary heat exchanger 202 by disposing the seventh low temperature valve 306.
Preferably, a third low temperature valve 302 is arranged between the cold side outlet of the rewarming heat exchanger 203 and the compressor 101, a normal temperature valve 307 is arranged between the hot side outlet of the rewarming heat exchanger 203 and the compressor 101, the refrigeration system independently controls the amount of the return fluid entering the compressor 101 from the cold side outlet of the rewarming heat exchanger 203 by arranging the third low temperature valve 302, and the amount of the return fluid entering the compressor 101 from the hot side outlet of the rewarming heat exchanger 203 by arranging the normal temperature valve 307.
The refrigeration system independently adjusts the cold quantity of different equipment by arranging low-temperature valves at a plurality of positions in the system, thereby avoiding the interference among the requirements of multiple cold quantities.
Preferably, a first heater 601 is arranged between the reboiler 503 and the secondary heat exchanger 202, and is used for heating the refrigerant flowing back to the secondary heat exchanger 202, so as to meet the requirement of the system on frequency regulation.
It should be noted that the first heater 601 may also be disposed at the low-pressure side inlet of the secondary heat exchanger 202, that is, the refrigerant flowing out of the reboiler 503 may be reheated by the first heater 601, merged with the refrigerant flowing out of the condenser 502, and then flow into the secondary heat exchanger 202. The refrigerant flowing out of the reboiler 503 may also join the refrigerant flowing out of the condenser 502, and then flow through the first heater 601 for rewarming, and flow into the secondary heat exchanger 202 after rewarming.
Preferably, a second heater 602 is arranged between the cold shield 501 and the reheating heat exchanger 203, and is used for heating the refrigerant entering the cold-side inlet of the reheating heat exchanger 203 to achieve the effect of cold flow reheating.
Further, a third heater 603 is arranged between the hot side outlet of the rewarming heat exchanger 203 and the compressor 101, and is used for heating the refrigerant flowing back to the compressor 101, so as to achieve the cold flow rewarming effect.
Preferably, a heater is disposed between the expander 401 and the condenser 502 for implementing a frequency-setting regulation function for the system.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A multi-demand coupling rectification refrigeration system is characterized by comprising a compressor, a primary heat exchanger, a secondary heat exchanger, an expander, a cooling heat exchanger, a rewarming heat exchanger, a first branch pipe, a second branch pipe, a third branch pipe, a fourth branch pipe, a fifth branch pipe and a sixth branch pipe; a high-pressure side inlet of the primary heat exchanger is connected with an outlet of the compressor, a high-pressure side outlet of the primary heat exchanger is connected with a high-pressure side inlet of the secondary heat exchanger through the first branch pipe, a high-pressure side inlet of the secondary heat exchanger is connected with an inlet of the expander, an outlet of the expander is configured to be connected with an inlet of a condenser, a low-pressure side inlet of the cooling heat exchanger is configured to be connected with an outlet of the condenser through the third branch pipe, a low-pressure side outlet of the cooling heat exchanger is connected with a cold-side inlet of the rewarming heat exchanger, and a cold-side outlet of the rewarming heat exchanger is connected with the compressor; a low-pressure side inlet of the secondary heat exchanger is connected with an outlet of the condenser through the fourth branch pipe, a low-pressure side outlet of the secondary heat exchanger is connected with a low-pressure side inlet of the primary heat exchanger, and a low-pressure side outlet of the primary heat exchanger is connected with an inlet of the compressor; a high-pressure side inlet of the primary heat exchanger is connected with a high-pressure side inlet of the cooling heat exchanger through the second branch pipe, a high-pressure side outlet of the cooling heat exchanger is configured to be connected with an inlet of the cold screen through the fifth branch pipe, a hot side inlet of the rewarming heat exchanger is configured to be connected with an outlet of the cold screen, and a hot side outlet of the rewarming heat exchanger is connected with the compressor; the high-pressure side outlet of the temperature-reducing heat exchanger is configured to be connected with the inlet of a reboiler through the sixth branch pipe, and the outlet of the reboiler is connected with the fourth branch pipe.
2. The multi-demand coupled rectification refrigeration system as claimed in claim 1, wherein a first low temperature valve and a second low temperature valve are sequentially arranged between the primary heat exchanger and the cooling heat exchanger.
3. The multi-demand coupled rectification refrigeration system according to claim 2, wherein a sixth low temperature valve is disposed between the desuperheater heat exchanger and the reboiler.
4. The multi-demand coupled rectification refrigeration system as claimed in claim 1, wherein a third low temperature valve is arranged between the cold side outlet of the rewarming heat exchanger and the compressor, and a normal temperature valve is arranged between the hot side outlet of the rewarming heat exchanger and the compressor.
5. The multi-demand coupled rectification refrigeration system according to claim 1, wherein a fourth low temperature valve is disposed between the secondary heat exchanger and the expander.
6. The multi-demand coupled rectification refrigeration system according to claim 1, wherein a fifth low temperature valve is disposed between the expander and the condenser.
7. The multi-demand coupled rectification refrigeration system according to claim 1, wherein a seventh low temperature valve is disposed between the secondary heat exchanger and the condenser.
8. The multi-demand coupled rectification refrigeration system according to claim 1, wherein a first heater is disposed between the secondary heat exchanger and the reboiler.
9. The multi-demand coupled rectification refrigeration system as claimed in claim 1, wherein a second heater is disposed between the rewarming heat exchanger and the cold shield.
10. The multi-demand coupled rectification refrigeration system as claimed in claim 9, wherein a third heater is disposed between the hot side outlet of the rewarming heat exchanger and the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120612611.7U CN214746759U (en) | 2021-03-25 | 2021-03-25 | Multi-demand coupling rectification refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120612611.7U CN214746759U (en) | 2021-03-25 | 2021-03-25 | Multi-demand coupling rectification refrigeration system |
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| Publication Number | Publication Date |
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| CN214746759U true CN214746759U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120612611.7U Active CN214746759U (en) | 2021-03-25 | 2021-03-25 | Multi-demand coupling rectification refrigeration system |
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| CN (1) | CN214746759U (en) |
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2021
- 2021-03-25 CN CN202120612611.7U patent/CN214746759U/en active Active
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