CN209857428U - Cold and hot double-effect split-flow type energy recovery system - Google Patents
Cold and hot double-effect split-flow type energy recovery system Download PDFInfo
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- CN209857428U CN209857428U CN201920728592.7U CN201920728592U CN209857428U CN 209857428 U CN209857428 U CN 209857428U CN 201920728592 U CN201920728592 U CN 201920728592U CN 209857428 U CN209857428 U CN 209857428U
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- heat exchanger
- pipe
- shell
- auxiliary heat
- main heat
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- 238000011084 recovery Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 9
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 4
- 238000005057 refrigeration Methods 0.000 abstract description 11
- 230000005494 condensation Effects 0.000 abstract description 7
- 238000009833 condensation Methods 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Abstract
The utility model discloses a cold and hot double-effect shunting type energy recovery system, which comprises a main heat exchanger and an auxiliary heat exchanger; the outlet end collecting pipe of the auxiliary heat exchanger is connected with a high-pressure liquid return pipe or a high-pressure liquid reservoir through a flow dividing pipe; the outlet end header of the main heat exchanger is also connected with a condenser through a second high-pressure exhaust pipe. The heat exchange efficiency of the heat exchange system is further improved, the heat load of the condenser is reduced, and heat sources with different temperature gradients are obtained by respectively utilizing the condensation heat of the refrigeration working medium and the initial cold energy of the heated water.
Description
Technical Field
The utility model relates to a heat exchange system, concretely relates to heat exchange system based on refrigerating system for freezer.
Background
The condensation heat recovery system of the existing refrigeration system of the food processing plant generally has two forms, the first is a direct heating recovery mode, and the second is an indirect heat recovery mode. The heat recovery effect of the first is significantly better than that of the second. However, the direct heating recovery method has the following disadvantages:
first, the recovery efficiency is low. The main reason is that the working medium flow of the total exhaust pipeline of the refrigeration compressor is far larger than the flow of the heated water, and the flow of the total exhaust pipeline of the refrigeration compressor is dozens of times or even hundreds of times larger than that of the heated water. Therefore, the flow velocity of water in the shell pass of the heat exchanger is very low, and the heat exchange effect is poor.
Secondly, the phenomenon that the refrigerating working medium is reheated after being cooled exists, and energy waste is caused. In a food processing plant, heated water is generally underground water, the temperature of the underground water is generally about 18 ℃ in a normal temperature state, the temperature of the underground water in some regions is between 10 and 13 ℃ and is lower than the condensation temperature, and as the initial temperature of heated water is very low, the heated water and a refrigerating working medium carry out large-temperature-difference heat exchange when just entering a heat exchanger, partial supercooled condensed liquid is generated, and the heat recovery amount is far less than the latent heat of condensation. Before entering the condenser, part of the subcooled liquid working medium is heated to the condensing temperature and then enters the condenser. The secondary heating of the refrigerating working medium causes serious cold energy waste.
Thirdly, the condensing efficiency of the condenser is reduced. Since part of the condensed liquid refrigerant and the gaseous refrigerant enter the condenser together, the condensing efficiency will be reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cold and hot economic benefits and social benefits shunting energy recovery system is provided, through carrying out more abundant utilization respectively to the initial cold energy of refrigeration working medium condensation heat and heated water, further improve heat exchange system's heat exchange efficiency, alleviate condenser heat load to obtain different temperature gradient's heat source.
The technical scheme of the utility model as follows:
cold and hot economic benefits shunting energy recovery system, it includes compressor and condenser, and the play liquid end of condenser is connected with high-pressure reservoir, its characterized in that through high-pressure liquid return pipe: the system also includes a primary heat exchanger and a secondary heat exchanger; the shell of the main heat exchanger and the shell of the auxiliary heat exchanger are connected with each other through a transition pipe or a transition hole; the shell of the main heat exchanger and the shell of the auxiliary heat exchanger are respectively provided with a shell pass fluid outlet and a shell pass fluid inlet; a main heat exchange unit is arranged in the shell of the main heat exchanger, and an auxiliary heat exchange unit is arranged in the shell of the auxiliary heat exchanger; the medium inlet end of the main heat exchange unit is connected with a main heat exchanger inlet end collecting pipe, and the medium outlet end of the main heat exchange unit is connected with a main heat exchanger outlet end collecting pipe; the medium inlet end of the auxiliary heat exchanger is connected with an auxiliary heat exchanger inlet end collecting pipe, and the medium outlet end of the auxiliary heat exchanger is connected with an auxiliary heat exchanger outlet end collecting pipe; the outlet header of the main heat exchanger is connected with the inlet header of the auxiliary heat exchanger through a fifth pipe; the inlet end collecting pipe of the main heat exchanger is connected with the compressor through a first high-pressure exhaust pipe; the outlet end collecting pipe of the auxiliary heat exchanger is connected with a high-pressure liquid return pipe or a high-pressure liquid reservoir through a flow dividing pipe; the outlet end header of the main heat exchanger is also connected with a condenser through a second high-pressure exhaust pipe.
Preferably, the system also comprises an auxiliary heat exchanger water outlet pipe of which the inner end is connected with the shell side of the auxiliary heat exchanger, and the auxiliary heat exchanger water outlet pipe is connected with the condenser through a water supplementing valve.
Preferably, the water outlet pipe of the secondary heat exchanger is also connected with a second water outlet valve.
Preferably, the system further comprises a recirculation water tank, a circulation water inlet end of the recirculation water tank is connected with the shell side fluid outlet through a circulation water pipe, and a circulation water outlet end of the recirculation water tank is connected with the shell side of the main heat exchanger through a pipeline with a circulation water pump.
Preferably, the first high-pressure exhaust pipe or the second high-pressure exhaust pipe is provided with an oil separator; the outlet end collecting pipe of the secondary heat exchanger is connected with a high-pressure liquid return pipe or a high-pressure liquid reservoir through a shunt pipe and an oil separator.
The utility model has the advantages of:
first, the utility model discloses a carry out more abundant utilization respectively to the initial cold energy of refrigerant condensation heat and heated water to reposition of redundant personnel before the refrigerant gets into the condenser, partly refrigerant gets into the condenser, and another part refrigerant gets into vice heat exchanger. Thereby improving the heat exchange efficiency and effectively reducing the heat load of the condenser.
In addition, the high-temperature refrigeration working medium and the low-temperature refrigeration working medium from the condenser and the auxiliary heat exchanger are mixed with each other and then enter the high-pressure liquid storage device at a lower overall temperature, or enter the high-pressure liquid storage device and then are mixed, so that the temperature of the refrigeration working medium in the high-pressure liquid storage device is reduced, the internal pressure is reduced, the refrigeration working medium from the condenser to the high-pressure liquid storage device flows back more smoothly, the condensation effect of the condenser is better, and the exhaust.
Second, the utility model discloses make full use of is heated the initial cold energy of water and is improved the refrigerating output of refrigerant to can obtain the heat source of different temperature gradients. The optimization of the cold and hot two-way recovery effect of energy is realized. Meanwhile, the exhaust pressure of the compressor is reduced, the potential safety hazard of a machine room is reduced, the shaft power of the compressor is reduced, the purposes of saving electricity and water are achieved, and the refrigerating capacity of the system is increased.
Third, the utility model discloses set up recirculation water subsystem, cyclic utilization high temperature high pressure gaseous state refrigeration working medium's superheat degree heat energy not only makes the interior velocity of water flow of main heat exchanger increase at double, and heat exchange efficiency improves by a wide margin, and it is higher to promote the temperature moreover, consequently has not only alleviateed condenser work load more fully, can produce the higher hot water of temperature moreover, and this technological effect is that prior art heat transfer device is difficult to accomplish. In addition, the arrangement of the recirculation water subsystem and the full utilization of the initial cold energy of the heated water greatly improve the overall energy recovery efficiency.
Fifth, the utility model discloses set up vice heat exchanger outlet pipe and be used for the condenser moisturizing and for the user provides low temperature hot water, it is this the utility model discloses a key innovation point again. The water supplement amount of the condenser is large and can generally reach more than 50 percent of the total water inflow. Therefore, a large amount of low-temperature water after the initial cold energy is extracted is introduced into the condenser to be used as make-up water, the technical means of providing low-temperature hot water for users and the like can improve the water inflow of the system in multiples, on one hand, the proportion of the refrigeration working medium to the heated water is reduced, the heat exchange efficiency is improved by improving the shell pass water flow rate, on the other hand, a sufficient cold source can be provided for the system, the refrigerating capacity is increased, the refrigerating capacity of the refrigerating system is improved, and more electricity is saved under the condition of the same refrigerating capacity.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the system of the present invention.
Detailed Description
The invention will be further described with reference to the following examples and drawings.
As shown in fig. 1, the embodiment of the system of the present invention includes a compressor 1 and a condenser 17, the liquid outlet end of the condenser 17 is connected to a high pressure liquid reservoir 33 through a high pressure liquid return pipe 32, the high pressure liquid reservoir 33 is connected to an evaporator 35 through a throttle valve 34, and the evaporator 35 is connected to the air inlet end of the compressor 1 through a low pressure air return pipe 36. The first high-pressure exhaust pipe 2 or the second high-pressure exhaust pipe 16 may be provided with an oil separator.
The embodiment of the system of the present invention further comprises a main heat exchanger 11 and an auxiliary heat exchanger 23 located below the main heat exchanger 11. The shell of the main heat exchanger 11 and the shell of the auxiliary heat exchanger 23 are connected with each other through a transition pipe or a transition hole 12, and the shell of the main heat exchanger 11 and the shell of the auxiliary heat exchanger 23 are respectively provided with a shell side fluid outlet 7 and a shell side fluid inlet 20. The main heat exchange unit 10 is installed in the shell of the main heat exchanger 11, and the auxiliary heat exchange unit 22 is installed in the shell of the auxiliary heat exchanger 23. The medium inlet end of the main heat exchange unit 10 is connected with a main heat exchanger inlet header 5 through a first pipe 18, and the medium outlet end of the main heat exchange unit 10 is connected with a main heat exchanger outlet header 14 through a second pipe 13. A medium inlet of the sub heat exchanger 23 is connected to a sub heat exchanger inlet header 25 through a third pipe 24, and a medium outlet of the sub heat exchanger 23 is connected to a sub heat exchanger outlet header 4 through a fourth pipe 19. The primary heat exchanger outlet header 14 is connected to the secondary heat exchanger inlet header 25 by a fifth tube 15.
The main heat exchanger 11 and the main heat exchanger 11 may also be arranged side to side, and the shells of the two are connected with each other through a transition pipe.
The inlet header 5 of the main heat exchanger is connected with the outlet end of the compressor 1 through a first high-pressure exhaust pipe 2. The outlet end header 4 of the secondary heat exchanger is connected with a high-pressure liquid return pipe 32 or a high-pressure liquid accumulator 33 through a shunt pipe 3. Alternatively, the shunt tube 3 is connected with the high-pressure liquid return tube 32 through an oil separator, or the shunt tube 3 is connected with the high-pressure reservoir 33 through the oil separator.
The main heat exchanger outlet header 14 is also connected to the inlet end of a condenser 17 by a second high pressure exhaust pipe 16.
The shell-side fluid inlet 20 is connected with a main water inlet valve 21, and the shell-side fluid outlet 7 is connected with a first water outlet valve 8 through a first water outlet pipe 9. The main water inlet valve 21 and the first water outlet valve 8 are opened, cold water (such as well water) enters the shell side of the secondary heat exchanger 23 from the shell side fluid inlet 20 under the action of pumping pressure to exchange heat with the secondary heat exchange unit 22, and enters the shell side of the main heat exchanger 11 through the transition pipe or the transition hole 12 to exchange heat with the main heat exchange unit 10, and then high-temperature water flows to a user through the first water outlet valve 8. Meanwhile, a high-temperature and high-pressure working medium (medium) from the compressor 1 releases heat through the tube side or plate side of the main heat exchange unit 10 and then enters the outlet header 14 of the main heat exchanger, the medium in the outlet header 14 of the main heat exchanger flows out through two branches, and the first branch enters the tube side or plate side of the auxiliary heat exchange unit 22 through the fifth pipe 15 and then flows to the high-pressure reservoir 33 through the branch pipe 3. The second branch is passed through a second high pressure exhaust pipe 16 to a condenser 17. The flow rate of the first branch medium does not need extra power, the flow rate of the first branch medium is mainly determined by the temperature difference between the medium and the shell side fluid of the secondary heat exchanger 23, and the higher the flow rate of the branch medium is, the more efficient the operation of the whole system is.
The embodiment of the system of the utility model discloses can also include recirculation tank 30, recirculation tank 30's circulation is intake and is held and pass through circulating pipe 6 and connect first outlet pipe 9, the shell side of circulation outlet end through the pipe connection main heat exchanger 11 that has circulating water pump 31. The water supply end of the recirculation water tank 30 is connected with a water supply pump 29 for supplying another path of hot water for users, and the high-temperature hot water can also be directly discharged through the first water outlet valve 8. The other path of hot water has a sufficiently high temperature because it can be circulated to the main heat exchange unit 10.
The utility model discloses the embodiment of system can also include the vice heat exchanger outlet pipe 27 of the 23 shell sides of inner connection vice heat exchanger, and this vice heat exchanger outlet pipe 27 is through the water tank that water supply valve 26 connects condenser 17. The secondary heat exchanger outlet pipe 27 is also connected to a second outlet valve 28 for providing hot water at a lower temperature to a user, for example for washing.
Claims (5)
1. Cold and hot double-effect shunting energy recovery system, it includes compressor (1) and condenser (17), and the play liquid end of condenser (17) is connected with high-pressure reservoir (33), its characterized in that through high-pressure liquid return pipe (32): the system further comprises a primary heat exchanger (11) and a secondary heat exchanger (23); the shell of the main heat exchanger (11) and the shell of the auxiliary heat exchanger (23) are connected with each other through a transition pipe or a transition hole (12); the shell of the main heat exchanger (11) and the shell of the auxiliary heat exchanger (23) are respectively provided with a shell-side fluid outlet (7) and a shell-side fluid inlet (20); a main heat exchange unit (10) is arranged in the shell of the main heat exchanger (11), and an auxiliary heat exchange unit (22) is arranged in the shell of the auxiliary heat exchanger (23); the medium inlet end of the main heat exchange unit (10) is connected with a main heat exchanger inlet end collecting pipe (5), and the medium outlet end of the main heat exchange unit (10) is connected with a main heat exchanger outlet end collecting pipe (14); the medium inlet end of the auxiliary heat exchanger (23) is connected with an auxiliary heat exchanger inlet end collecting pipe (25), and the medium outlet end of the auxiliary heat exchanger (23) is connected with an auxiliary heat exchanger outlet end collecting pipe (4); the outlet end header (14) of the main heat exchanger is connected with the inlet end header (25) of the auxiliary heat exchanger through a fifth pipe (15); the inlet end collecting pipe (5) of the main heat exchanger is connected with the compressor (1) through a first high-pressure exhaust pipe (2); the outlet end header (4) of the auxiliary heat exchanger is connected with a high-pressure liquid return pipe (32) or a high-pressure liquid reservoir (33) through a shunt pipe (3); the outlet header (14) of the main heat exchanger is also connected with a condenser (17) through a second high-pressure exhaust pipe (16).
2. The dual purpose split cold and hot energy recovery system of claim 1, wherein: the system also comprises an auxiliary heat exchanger water outlet pipe (27) of which the inner end is connected with the shell side of the auxiliary heat exchanger (23), and the auxiliary heat exchanger water outlet pipe (27) is connected with the condenser (17) through a water supplementing valve (26).
3. The dual purpose split cold and hot energy recovery system of claim 2, wherein: the water outlet pipe (27) of the auxiliary heat exchanger is also connected with a second water outlet valve (28).
4. The dual effect cold and hot split energy recovery system of claim 1, 2 or 3, wherein: the system also comprises a recirculation water tank (30), wherein the circulating water inlet end of the recirculation water tank (30) is connected with the shell side fluid outlet (7) through a circulating water pipe (6), and the circulating water outlet end is connected with the shell side of the main heat exchanger (11) through a pipeline with a circulating water pump (31).
5. The dual effect cold and hot split energy recovery system of claim 1, 2 or 3, wherein: the first high-pressure exhaust pipe (2) or the second high-pressure exhaust pipe (16) is provided with an oil separator; the outlet end header (4) of the secondary heat exchanger is connected with a high-pressure liquid return pipe (32) or a high-pressure liquid reservoir (33) through the shunt pipe (3) and the oil separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920728592.7U CN209857428U (en) | 2019-05-21 | 2019-05-21 | Cold and hot double-effect split-flow type energy recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920728592.7U CN209857428U (en) | 2019-05-21 | 2019-05-21 | Cold and hot double-effect split-flow type energy recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209857428U true CN209857428U (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920728592.7U Withdrawn - After Issue CN209857428U (en) | 2019-05-21 | 2019-05-21 | Cold and hot double-effect split-flow type energy recovery system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209857428U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030767A (en) * | 2019-05-21 | 2019-07-19 | 李永堂 | Heating-cooling double-effect shunt energy recycling system |
-
2019
- 2019-05-21 CN CN201920728592.7U patent/CN209857428U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030767A (en) * | 2019-05-21 | 2019-07-19 | 李永堂 | Heating-cooling double-effect shunt energy recycling system |
| CN110030767B (en) * | 2019-05-21 | 2024-02-02 | 李永堂 | Cold and hot double-effect split-flow type energy recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191227 Effective date of abandoning: 20240202 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191227 Effective date of abandoning: 20240202 |