CN111912138A - Big difference in temperature heat exchanger group of type of rising temperature absorption - Google Patents
Big difference in temperature heat exchanger group of type of rising temperature absorption Download PDFInfo
- Publication number
- CN111912138A CN111912138A CN202010703330.2A CN202010703330A CN111912138A CN 111912138 A CN111912138 A CN 111912138A CN 202010703330 A CN202010703330 A CN 202010703330A CN 111912138 A CN111912138 A CN 111912138A
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- Prior art keywords
- temperature
- low
- heat exchanger
- absorber
- evaporator
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 41
- 230000000630 rising effect Effects 0.000 title description 2
- 239000006096 absorbing agent Substances 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 239000003507 refrigerant Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000002918 waste heat Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B35/00—Boiler-absorbers, i.e. boilers usable for absorption or adsorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
A temperature-raising absorption type large-temperature-difference heat exchange unit relates to the technical field of energy. The invention comprises a heat exchanger and a temperature-rising absorption heat pump unit, wherein the temperature-rising absorption heat pump unit comprises a condenser and a generator. The temperature-rising absorption heat pump unit adopts a two-stage temperature-rising heat pump, and further comprises a low-temperature absorber, a low-temperature evaporator, a high-temperature absorber and a high-temperature evaporator. And a solution circulation loop among the generator, the low-temperature absorber and the high-temperature absorber is respectively provided with a low-temperature solution heat exchanger and a high-temperature solution heat exchanger. An internal circulation is arranged between the low-temperature absorber and the high-temperature evaporator. The fluid medium to be heated sequentially enters the condenser, the heat exchanger and the high-temperature absorber, and the medium-low temperature heat source medium flows through the generator, the heat exchanger and the low-temperature evaporator. The invention can utilize various residual heat, realize the large temperature difference stable heating of various fluids, realize the reutilization of most of middle-low temperature various residual heat sources, and is particularly suitable for heat supply.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a heating type absorption large-temperature-difference heat exchange unit.
Background
In practice, it is sometimes necessary to heat a medium at a lower temperature to a higher temperature. But often the heat source is insufficient, or only the available heat source with medium and low temperature exists, and the maximum temperature of the medium and low temperature heat source is lower or far lower than the temperature of the heated medium.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a heating absorption type large-temperature-difference heat exchange unit. The multi-type waste heat recovery device can utilize various types of waste heat, realize large-temperature-difference stable heating of various types of fluids, realize recycling of most of middle-low-temperature various types of waste heat sources, and is particularly suitable for heat supply.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a temperature-rising absorption type large-temperature-difference heat exchange unit comprises a heat exchanger and a temperature-rising absorption type heat pump unit, wherein the temperature-rising absorption type heat pump unit comprises a condenser and a generator. The two-stage heating absorption heat pump unit also comprises a low-temperature absorber, a low-temperature evaporator, a high-temperature absorber and a high-temperature evaporator. And a solution circulation loop among the generator, the low-temperature absorber and the high-temperature absorber is respectively provided with a low-temperature solution heat exchanger and a high-temperature solution heat exchanger. An internal circulation is arranged between the low-temperature absorber and the high-temperature evaporator. The fluid medium to be heated sequentially enters the condenser, the heat exchanger and the high-temperature absorber, and the medium-low temperature heat source medium flows through the generator, the heat exchanger and the low-temperature evaporator.
In the heating absorption type large temperature difference heat exchange unit, liquid distribution devices are arranged in the generator, the low-temperature absorber and the high-temperature absorber.
In the heating absorption type large-temperature-difference heat exchange unit, a low-temperature refrigerant pump and a high-temperature refrigerant pump are respectively arranged on inlet pipelines of the low-temperature evaporator and the high-temperature evaporator.
In the heating absorption type large-temperature-difference heat exchange unit, the high-temperature evaporator adopts a shell-and-tube heat exchanger or a flash tank, and a water supplementing device is arranged when the high-temperature evaporator adopts the flash tank; the heat exchanger adopts a plate heat exchanger or a shell and tube heat exchanger.
In the heating absorption type large-temperature-difference heat exchange unit, the generator and the condenser adopt a single-stage or multi-stage generation/condensation cylinder module; the low-temperature absorber and the low-temperature evaporator adopt a single-stage low-temperature absorption/evaporation cylinder module; the high-temperature absorber and the high-temperature evaporator adopt a single-stage high-temperature absorbing/evaporating cylinder module.
In the above-mentioned heating absorption type large temperature difference heat exchanger unit, the internal circulation is set to a closed circulation or an open circulation as required.
In the heating absorption type large-temperature-difference heat exchange unit, n solution pumps are arranged in a solution circulation loop among the generator, the low-temperature absorber and the high-temperature absorber, and n is more than or equal to 1.
In the heating absorption type large-temperature-difference heat exchange unit, the medium-low temperature heat source medium is arranged among the generator, the heat exchanger and the low-temperature evaporator in a series, parallel, series-parallel, inverse series or inverse series-parallel flow manner according to requirements.
Due to the adoption of the structure, the medium-low temperature waste heat source can transfer heat to the medium to be heated on the other side through the process of the invention, and the medium to be heated is heated to a higher temperature which is higher than the highest temperature of the medium-low temperature waste heat source. Compared with the absorption heat exchange unit and the heating absorption heat exchange unit in the prior art, the invention can realize the conversion of the small temperature difference of the medium-low temperature waste heat source to the large temperature difference of the heated medium, greatly improves the heat exchange efficiency and widens the application field of the heating absorption heat pump.
The invention is further described with reference to the following figures and detailed description.
Drawings
Fig. 1 is a schematic diagram of the structure and flow of the heat exchanger unit of the present invention.
Detailed Description
Referring to fig. 1, the heat-rising absorption type large temperature difference heat exchange unit of the invention comprises a heat exchanger 6 and a two-stage heat-rising absorption type heat pump unit. The two-stage heating absorption heat pump unit comprises a condenser 2, a generator 4, a low-temperature absorber 1.1, a low-temperature evaporator 3.1, a high-temperature absorber 1.2 and a high-temperature evaporator 3.2. The solution circulation loops among the generator 4, the low-temperature absorber 1.1 and the high-temperature absorber 1.2 are respectively provided with a low-temperature solution heat exchanger 5.1 and a high-temperature solution heat exchanger 5.2 for realizing heat transfer among solutions with different concentrations. An internal circulation c is arranged between the low-temperature absorber 1.1 and the high-temperature evaporator 3.2, and the internal circulation c can be set to be a closed circulation or an open circulation according to requirements. The fluid medium a to be heated enters the condenser 2, the heat exchanger 6 and the high-temperature absorber 1.2 in sequence. The medium and low temperature heat source medium b is arranged among the generator 4, the heat exchanger 6 and the low temperature evaporator 3.1 in a series, parallel, series-parallel, inverse series or inverse series-parallel flow way according to requirements. Liquid distributing devices are arranged in the generator 4, the low-temperature absorber 1.1 and the high-temperature absorber 1.2. The inlet pipelines of the low-temperature evaporator 3.1 and the high-temperature evaporator 3.2 are respectively provided with a low-temperature refrigerant pump 9 and a high-temperature refrigerant pump 8. The high-temperature evaporator 3.2 adopts a shell-and-tube heat exchanger or a flash tank, and a water supplementing device is arranged when the high-temperature evaporator 3.2 adopts the flash tank; the heat exchanger 6 adopts a plate heat exchanger or a shell and tube heat exchanger. The generator 4 and the condenser 2 adopt a single-stage or multi-stage generation/condensation cylinder module; the low-temperature absorber 1.1 and the low-temperature evaporator 3.1 adopt a single-stage low-temperature absorbing/evaporating cylinder module; the high-temperature absorber 1.2 and the high-temperature evaporator 3.2 adopt a single-stage high-temperature absorbing/evaporating cylinder module. N solution pumps 7 are arranged in a solution circulation loop among the generator 4, the low-temperature absorber 1.1 and the high-temperature absorber 1.2, and n is more than or equal to 1.
When the heat exchanger unit works, the solution side circulates: the concentrated solution flows out of the generator 4, passes through the low-temperature solution heat exchanger 5.1 and the high-temperature solution heat exchanger 5.2 by the solution pump 7, and enters the high-temperature absorber 1.2 to absorb high-temperature refrigerant steam. The intermediate concentration solution flows out of the high temperature absorber 1.2, and then enters the low temperature absorber 1.1 through the high temperature solution heat exchanger 5.2 to absorb low temperature refrigerant steam. The dilute solution flows out of the low-temperature absorber 1.1 and then enters the generator 4 through the low-temperature solution heat exchanger 5.1 to generate refrigerant steam which becomes concentrated solution, and the solution side circulation is completed. The solutions of different concentrations and temperatures are heat exchanged via a low temperature solution heat exchanger 5.1 and a high temperature solution heat exchanger 5.2.
When the heat exchange unit works, the refrigerant side circulates: the refrigerant water of the condenser 2 is divided into two paths, one path enters the high-temperature evaporator 3.2 through the high-temperature refrigerant pump 8, and the refrigerant water is evaporated into refrigerant steam in the high-temperature evaporator 3.2, absorbed by the high-temperature absorber 1.2 and enters the solution circulation side; the other path enters a low-temperature evaporator 3.1 through a low-temperature refrigerant pump 9, refrigerant water is evaporated into refrigerant steam in the low-temperature evaporator 3.1, and the refrigerant steam is absorbed by a low-temperature absorber 1.1 and enters the solution circulation side; then enters the generator 4 to generate refrigerant steam which is condensed into refrigerant water in the condenser 2, thereby completing the circulation process of the refrigerant. The refrigerant flows in series in the condenser 2 and the evaporator in a single direction, the number of the refrigerant pumps is m, and m is more than or equal to 1.
When the heat exchanger unit works, the internal circulation is as follows: and a closed circulating heat exchange loop is used for realizing heat transfer between the low-temperature absorber 1.1 and the high-temperature evaporator 3.2.
When the heat exchange unit works, the medium-low temperature heat source side: the medium b realizes the flow settings of series connection, parallel connection, series-parallel connection, inverse series-parallel connection and the like among the generator 4, the heat exchanger 6 and the low-temperature evaporator 3.1, and flows out of the unit after the heat is released by the heat exchanger. The medium b is a medium-low temperature heat source, and the temperature is above 45 ℃.
When the heat exchanger unit works, a medium to be heated is as follows: the medium a to be heated sequentially enters the condenser 2 of the temperature-rising absorption heat pump, the heat exchanger 6 and the high-temperature absorber 1.2 of the temperature-rising absorption heat pump to absorb heat and rise temperature.
Claims (8)
1. A temperature-rising absorption type large-temperature-difference heat exchange unit comprises a heat exchanger (6) and a temperature-rising absorption heat pump unit, wherein the temperature-rising absorption heat pump unit comprises a condenser (2) and a generator (4), and is characterized in that the temperature-rising absorption heat pump unit adopts a two-stage temperature-rising heat pump, the two-stage temperature-rising absorption heat pump unit further comprises a low-temperature absorber (1.1), a low-temperature evaporator (3.1), a high-temperature absorber (1.2) and a high-temperature evaporator (3.2), and solution circulation loops among the generator (4), the low-temperature absorber (1.1) and the high-temperature absorber (1.2) are respectively provided with a low-temperature solution heat exchanger (5.1) and a high-temperature solution heat exchanger (5.2); an internal circulation (c) is arranged between the low-temperature absorber (1.1) and the high-temperature evaporator (3.2); the fluid medium (a) to be heated sequentially enters the condenser (2), the heat exchanger (6) and the high-temperature absorber (1.2), and the medium-low temperature heat source medium (b) flows through the generator (4), the heat exchanger (6) and the low-temperature evaporator (3.1).
2. The heating absorption type large temperature difference heat exchanger unit according to claim 1, wherein a liquid distribution device is arranged in the generator (4), the low temperature absorber (1.1) and the high temperature absorber (1.2).
3. A heating absorption type large temperature difference heat exchange unit according to claim 1 or 2, wherein the inlet pipelines of the low-temperature evaporator (3.1) and the high-temperature evaporator (3.2) are respectively provided with a low-temperature refrigerant pump (9) and a high-temperature refrigerant pump (8).
4. The heating absorption type large temperature difference heat exchange unit according to claim 3, wherein the high-temperature evaporator (3.2) adopts a shell-and-tube heat exchanger or a flash tank, and a water supplementing device is arranged when the high-temperature evaporator (3.2) adopts the flash tank; the heat exchanger (6) adopts a plate heat exchanger or a shell and tube heat exchanger.
5. The heating absorption type large temperature difference heat exchange unit according to claim 4, wherein the generator (4) and the condenser (2) adopt a single-stage or multi-stage generation/condensation cylinder module; the low-temperature absorber (1.1) and the low-temperature evaporator (3.1) adopt a single-stage low-temperature absorption/evaporation cylinder module; the high-temperature absorber (1.2) and the high-temperature evaporator (3.2) adopt a single-stage high-temperature absorbing/evaporating cylinder module.
6. The elevated temperature absorption large temperature difference heat exchanger unit according to claim 5, wherein the internal circulation (c) is set to a closed circulation or an open circulation as required.
7. The heating absorption type large temperature difference heat exchange unit according to claim 6, wherein n solution pumps (7) are arranged in a solution circulation loop among the generator (4), the low-temperature absorber (1.1) and the high-temperature absorber (1.2), and n is more than or equal to 1.
8. The heating absorption type large-temperature-difference heat exchange unit according to claim 7, wherein the medium-low temperature heat source medium (b) is arranged among the generator (4), the heat exchanger (6) and the low-temperature evaporator (3.1) in a series, parallel, series-parallel, inverse series or inverse series-parallel flow manner according to requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703330.2A CN111912138A (en) | 2020-07-21 | 2020-07-21 | Big difference in temperature heat exchanger group of type of rising temperature absorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703330.2A CN111912138A (en) | 2020-07-21 | 2020-07-21 | Big difference in temperature heat exchanger group of type of rising temperature absorption |
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| Publication Number | Publication Date |
|---|---|
| CN111912138A true CN111912138A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010703330.2A Pending CN111912138A (en) | 2020-07-21 | 2020-07-21 | Big difference in temperature heat exchanger group of type of rising temperature absorption |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006162113A (en) * | 2004-12-03 | 2006-06-22 | Ebara Corp | Absorption heat pump |
| US20060230776A1 (en) * | 2004-10-13 | 2006-10-19 | Ebara Corporation | Absorption heat pump |
| CN101329118A (en) * | 2008-07-23 | 2008-12-24 | 清华大学 | Compact type absorption heat pump apparatus capable of increasing residual heat temperature greatly |
| CN101825369A (en) * | 2010-04-02 | 2010-09-08 | 清华大学 | High-efficiency compact high-temperature absorption type heat pump unit |
| CN108224844A (en) * | 2018-03-09 | 2018-06-29 | 璧垫嘲 | The big temperature difference heat-exchange unit of absorption-compression type |
| CN208222910U (en) * | 2018-03-09 | 2018-12-11 | 赵泰 | The big temperature difference heat-exchange unit of first kind absorption-compression type |
| CN212409131U (en) * | 2020-07-21 | 2021-01-26 | 同方节能工程技术有限公司 | Temperature-rising absorption type large-temperature-difference heat exchange unit |
-
2020
- 2020-07-21 CN CN202010703330.2A patent/CN111912138A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060230776A1 (en) * | 2004-10-13 | 2006-10-19 | Ebara Corporation | Absorption heat pump |
| JP2006162113A (en) * | 2004-12-03 | 2006-06-22 | Ebara Corp | Absorption heat pump |
| CN101329118A (en) * | 2008-07-23 | 2008-12-24 | 清华大学 | Compact type absorption heat pump apparatus capable of increasing residual heat temperature greatly |
| CN101825369A (en) * | 2010-04-02 | 2010-09-08 | 清华大学 | High-efficiency compact high-temperature absorption type heat pump unit |
| CN108224844A (en) * | 2018-03-09 | 2018-06-29 | 璧垫嘲 | The big temperature difference heat-exchange unit of absorption-compression type |
| CN208222910U (en) * | 2018-03-09 | 2018-12-11 | 赵泰 | The big temperature difference heat-exchange unit of first kind absorption-compression type |
| CN212409131U (en) * | 2020-07-21 | 2021-01-26 | 同方节能工程技术有限公司 | Temperature-rising absorption type large-temperature-difference heat exchange unit |
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