CN110657601A - Waste water direct-feeding lithium bromide absorption heat pump unit - Google Patents
Waste water direct-feeding lithium bromide absorption heat pump unit Download PDFInfo
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- CN110657601A CN110657601A CN201910275724.XA CN201910275724A CN110657601A CN 110657601 A CN110657601 A CN 110657601A CN 201910275724 A CN201910275724 A CN 201910275724A CN 110657601 A CN110657601 A CN 110657601A
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- heat
- enters
- lithium bromide
- evaporator
- absorber
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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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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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
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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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
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- 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
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention provides a wastewater direct-feeding lithium bromide absorption heat pump unit, the overall structure of which comprises: the device comprises an upper horizontal cylinder, a lower horizontal cylinder, a heat exchanger on the left side, a low-temperature heat source on the right side, two circulating pumps and a plurality of connecting pipelines, wherein the two ends of the upper horizontal cylinder are closed, and the lower horizontal cylinder is closed. Wherein: the upper part of the interior of the upper cylinder body is provided with a condenser, and the lower part of the interior of the upper cylinder body is provided with a generator; the evaporator is arranged on the upper part of the interior of the lower cylinder, and the absorber is arranged below the interior of the lower cylinder. The lithium bromide water solution is heated by the driving heat source in the generator, after part of the lithium bromide water solution is vaporized, the lithium bromide concentrated solution enters the absorber downwards, and the heating medium water vapor enters the condenser upwards. The heat medium water vapor is cooled and condensed by cooling water in the condenser, then enters the evaporator downwards to absorb the heat of the low-temperature heat source in the evaporator, the vaporized heat medium water vapor enters the absorber downwards to be absorbed by the lithium bromide concentrated solution in the absorber, the solution concentration is reduced, and then the solution is sent back to the generator upwards by the circulating pump.
Description
Technical Field
The invention relates to the technical field of waste heat utilization, in particular to a waste water direct-feeding lithium bromide absorption heat pump unit.
Background
In the production process of industries such as metallurgy, coal chemical industry, salt chemical industry and the like, a large amount of process circulating cooling water or process wastewater contains a large amount of heat energy. Because the water quality components are complex, the conventional heat exchange equipment is easy to cause pollution, corrosion and even blockage, and only a very small part of the waste water waste heat is utilized for building heating or heating softened water. If the waste water waste heat can be used as a low-temperature heat source of the lithium bromide unit, the waste water waste heat can be fully utilized, and the direction and the application of waste water waste heat utilization are enriched.
The lithium bromide absorption type machine set is mainly composed of a generator, a condenser, an evaporator, an absorber, a heat exchanger, a circulating pump and the like. In the operation process of the lithium bromide absorption type unit, after the lithium bromide dilute solution is heated by a driving heat source in the generator, the heat medium water in the solution is vaporized, and the concentration of the lithium bromide dilute solution in the generator is continuously increased along with the continuous vaporization of the heat medium water and enters the absorber; the water vapor of the heating medium enters a condenser, is cooled by cooling water in the condenser and then is condensed to form high-pressure low-temperature liquid water; when the heat medium water in the condenser enters the evaporator, the heat of the low-temperature heat source in the evaporator is absorbed and evaporated into low-temperature heat medium water vapor; the water vapor of the low-temperature heating medium enters the absorber, is absorbed by the lithium bromide concentrated solution in the absorber, the concentration of the solution is gradually reduced, and then the solution is sent back to the generator by the circulating pump to complete the whole circulation.
The circulation is kept, and heat is continuously produced.
However, the evaporator of the lithium bromide absorption heat pump unit usually adopts a shell-tube or plate-type equal-dividing-wall heat exchanger, which has high requirement on water quality, and the above-mentioned waste water has complex water quality components and is easy to cause pollution, corrosion and even blockage to the evaporator, so that the waste water can not be directly used as a low-temperature heat source of the lithium bromide absorption heat pump unit. If the heat energy of the lithium bromide is transferred to clean medium water by adopting proper intermediate heat exchange equipment and then enters the lithium bromide unit, the process flow is complex, the occupied space is large, the investment cost is high, and heat transfer loss can be caused.
The boiling point of water can be reduced along with the reduction of the environmental pressure, for example, a negative pressure environment is artificially manufactured, so that the wastewater is subjected to flash evaporation, clean steam is generated and is directly conveyed into an evaporator to release heat, and the wastewater is directly used as a low-temperature heat source of the lithium bromide absorption heat pump unit.
Disclosure of Invention
The invention provides a wastewater direct-feeding lithium bromide absorption heat pump unit, the overall structure of which comprises: the device comprises an upper horizontal cylinder, a lower horizontal cylinder, a heat exchanger on the left side, a low-temperature heat source on the right side, two circulating pumps and a plurality of connecting pipelines, wherein the two ends of the upper horizontal cylinder are closed; wherein: the upper part inside the upper cylinder is provided with a condenser, the lower part inside the upper cylinder is provided with a generator, the upper part inside the lower cylinder is provided with an evaporator, and the lower part inside the lower cylinder is provided with an absorber; the lithium bromide dilute solution is heated by a driving heat source in the generator, the concentration of the solution is increased after part of the heat medium water is vaporized, the lithium bromide concentrated solution enters an absorber downwards, and the heat medium water vapor enters a condenser upwards; the heat medium water vapor is cooled and condensed by cooling water in the condenser, then enters the evaporator downwards to absorb the heat of a low-temperature heat source in the evaporator, the heat medium water vapor generated by vaporization enters the absorber downwards to be absorbed by a lithium bromide concentrated solution in the absorber, the concentration of the solution is reduced, and then the solution is sent back to the generator upwards by a circulating pump; the other circulating pump is used for circularly spraying the heating medium water in the evaporator; cooling water from a heat user enters an absorber to absorb heat, then enters a condenser to absorb heat, and finally is sent back to the heat user to release heat; the heat medium from the driving heat source enters the generator, and the heat medium flows out after heat release; one side of the heat exchanger is high-temperature concentrated solution flowing out of the generator, and the other side of the heat exchanger is low-temperature dilute solution flowing out of the absorber, and the high-temperature concentrated solution and the low-temperature dilute solution exchange heat; the method is characterized in that: the low-temperature heat source is a wastewater flash evaporator, and part of wastewater is flashed into steam by the wastewater flash evaporator to be used as the low-temperature heat source of the wastewater direct-entering lithium bromide absorption heat pump unit.
The wastewater flash evaporator is an upright tank-type container in appearance and consists of an upper end enclosure, a lower end enclosure and an upright cylinder in the middle, the top of the upper end enclosure is externally connected with a wastewater inlet pipe, the bottom of the lower end enclosure is externally connected with a drain pipe and a drainage pump, a conical nozzle is arranged on a horizontal water spraying plate which is arranged in the vertical cylinder body and close to the upper end enclosure, the conical nozzle adopts a larger outlet aperture, waste water enters the tank after passing through the conical nozzle, a part of waste water is flashed into steam, the steam enters a heat transfer pipe in the evaporator through a steam inlet pipe to be condensed and release heat, the device is used for heating the heat medium water in the evaporator to generate heat medium water vapor, condensed water and non-condensable gas generated in the heat transfer pipe enter the steam-water separator through the drain pipe, the non-condensable gas generated by separation is discharged through the vacuum pump, and the condensed water enters the drain pipe of the waste water flash evaporator and is discharged together with the discharged waste water through the drainage pump.
The heat consumer is the heat output receiving device of the wastewater direct-feeding lithium bromide absorption heat pump unit.
Drawings
FIG. 1 is an internal structure view of an embodiment of a wastewater straight-through lithium bromide absorption heat pump unit according to the present invention;
fig. 2 is an outline view of an embodiment of the wastewater straight-through lithium bromide absorption heat pump unit of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Fig. 1 shows an internal structure view of an embodiment of a wastewater straight-through lithium bromide absorption heat pump unit according to the present invention.
The internal structure of the embodiment of the wastewater direct-feeding lithium bromide absorption heat pump unit is as follows:
a waste water direct-feeding lithium bromide absorption heat pump unit mainly comprises a generator 50, a condenser 40, an evaporator 60, an absorber 70, a heat exchanger 30, a plurality of pumps, a low-temperature heat source, namely a waste water flash evaporator 80 and the like.
When the lithium bromide aqueous solution is heated by the driving heat source in the generator 50, the heating medium water in the solution is vaporized; with the continuous vaporization of the heating medium water, the concentration of the lithium bromide dilute solution in the generator continuously rises, and then the lithium bromide dilute solution downwards enters the absorber 70; the heat medium water vapor upwards enters the condenser 40, is cooled by cooling water in the condenser 40 and then is condensed to form high-pressure low-temperature heat medium water; the low-temperature heat medium water in the condenser enters the evaporator 60 downwards and absorbs the heat of the low-temperature heat source in the evaporator 60 to be vaporized to generate heat medium water vapor; then, the low-temperature heating medium water vapor generated by vaporization enters the absorber 70 downwards, is absorbed by the lithium bromide concentrated solution in the absorber 70, the solution concentration is reduced, and is sent back to the generator upwards by the circulating pump 73, and the whole circulation is completed. In addition, the circulation pump 63 is used for circulating spraying of the heat medium water in the evaporator, thereby enhancing evaporation.
The cooling water firstly enters the absorber 70 through the cooling water inlet 71 to absorb heat, then enters the condenser 40 to absorb heat, and finally is sent to a heat user from the cooling water outlet 41, and the circulation is continued to continuously generate heat. The heat source is driven to enter the generator 50 from the heat medium inlet 51, and after heat release, the low-temperature heat medium is sent out from the outlet 52.
Because the lithium bromide dilute solution is cooled in the absorber 70, the temperature is lower, in order to save the heat for heating the dilute solution and improve the heat efficiency of the whole device, a heat exchanger 30 is added in the system, so that the high-temperature concentrated solution flowing out of the generator 50 and the low-temperature dilute solution flowing out of the absorber 70 exchange heat, and the temperature of the dilute solution entering the generator is improved.
The heat medium water is heated by the low temperature heat source in the evaporator 60 so that the heat medium water in the evaporator is continuously vaporized. The wastewater flash steam is a low-temperature heat source of the embodiment of the wastewater direct-feeding lithium bromide absorption heat pump unit. The waste water flash evaporator 80 is a waste water flash evaporator, a vacuum environment is maintained by a vacuum pump, so that the waste water part entering the waste water flash evaporator is subjected to flash evaporation, the flash evaporation steam enters a heat transfer pipe in the evaporator 60 through a steam inlet pipe 61 to be condensed and release heat, and the heat transfer steam is used for heating the heat medium water in the evaporator 60 to generate heat medium water steam. The condensed water generated in the heat transfer pipe is discharged through the drain pipe 62.
Fig. 2 is a general diagram of an embodiment of the wastewater straight-through lithium bromide absorption heat pump unit of the invention.
The figure shows the outline general and the accessory facilities of the embodiment of the wastewater straight-in type lithium bromide absorption heat pump unit.
Wherein the content of the first and second substances,
the embodiment profiles generally include: the device comprises a frame 5, an upper cylinder 10, a lower cylinder 20, a heat exchanger 30 and a low-temperature heat source namely a wastewater flash evaporator 80; the frame 5 combines the upper cylinder 10, the lower cylinder 20, the heat exchanger 30, and the wastewater flash evaporator 80.
The subsidiary facilities include: driving the heat source 90, and the heat consumer 100.
In the upper cylinder 10, a condenser 40 is horizontally arranged at the upper part, and a generator 50 is horizontally arranged at the lower part; in the lower cylinder 20, an evaporator 60 is horizontally disposed at an upper portion thereof, and an absorber 70 is horizontally disposed at a lower portion thereof.
A heat exchanger 30 is arranged at the right side of the frame 5 and in the middle of the right side of the upper cylinder and the lower cylinder.
The waste water flash evaporator 80 is vertically arranged at the left side of the frame 5, and is in the shape of an upright tank type container which consists of an upper end enclosure, a lower end enclosure and an upright cylinder body in the middle. The top of the upper seal head is externally connected with a waste water inlet pipe 81, and the bottom of the lower seal head is externally connected with a drain pipe 82 and a drainage pump 83. A conical nozzle 84 is arranged on a horizontal water spraying plate which is arranged inside the vertical cylinder body and close to the upper end enclosure, the conical nozzle is provided with a larger outlet aperture, and waste water enters the tank after passing through the conical nozzle.
After the wastewater flowing into the barrel of the wastewater flash evaporator from the wastewater inlet pipe 81 of the upper end enclosure passes through the conical nozzle 84, a part of the wastewater is flashed into steam, enters the heat transfer pipe in the evaporator 60 through the steam inlet pipe 61, is condensed and releases heat, and is used for heating the heat medium water in the evaporator 60 to generate heat medium water vapor. The condensed water and the non-condensable gas generated in the heat transfer pipe enter the steam-water separator 53 through the drain pipe 62, the non-condensable gas generated by the separation is discharged through the vacuum pump 54, and the condensed water enters the drain pipe 82 of the waste water flash evaporator 80 and is discharged together with the discharged waste water through the drain pump 83.
The heat medium flowing out from the driving heat source enters the generator 50 in the upper cylinder 10 through the inlet 51, and after heat release, the low-temperature heat medium returns from the outlet 52.
The cooling water generated by the hot user 100 firstly enters the absorber 70 in the lower cylinder 20 through the cooling water inlet 71 to absorb heat, then enters the condenser 40 of the upper cylinder 10 to absorb heat upwards, and finally is sent back to the hot user from the cooling water outlet 41. The circulation is kept, and heat is continuously produced.
Claims (2)
1. A waste water direct-feeding lithium bromide absorption heat pump unit, the general structure of which comprises: the device comprises an upper horizontal cylinder, a lower horizontal cylinder, a heat exchanger on the left side, a low-temperature heat source on the right side, two circulating pumps and a plurality of connecting pipelines, wherein the two ends of the upper horizontal cylinder are closed; wherein: the upper part inside the upper cylinder is provided with a condenser, the lower part inside the upper cylinder is provided with a generator, the upper part inside the lower cylinder is provided with an evaporator, and the lower part inside the lower cylinder is provided with an absorber; the lithium bromide dilute solution is heated by a driving heat source in the generator, the concentration of the solution is increased after part of the heat medium water is vaporized, the lithium bromide concentrated solution enters an absorber downwards, and the heat medium water vapor enters a condenser upwards; the heat medium water vapor is cooled and condensed by cooling water in the condenser, then enters the evaporator downwards to absorb the heat of a low-level heat source in the evaporator, the heat medium water vapor generated by vaporization enters the absorber downwards to be absorbed by a lithium bromide concentrated solution in the absorber, the concentration of the solution is reduced, and then the solution is sent back to the generator upwards by a circulating pump; the other circulating pump is used for circularly spraying the heating medium water in the evaporator; cooling water from a heat user enters an absorber to absorb heat, then enters a condenser to absorb heat, and finally is sent back to the heat user to release heat; the heat medium from the driving heat source enters the generator, and the heat medium flows out after heat release; one side of the heat exchanger is high-temperature concentrated solution flowing out of the generator, and the other side of the heat exchanger is low-temperature dilute solution flowing out of the absorber, and the high-temperature concentrated solution and the low-temperature dilute solution exchange heat; the method is characterized in that: the low-temperature heat source is a wastewater flash evaporator.
2. The wastewater straight-through lithium bromide absorption heat pump unit according to claim 1, characterized in that: the waste water flash evaporator is an upright tank-type container in appearance and comprises an upper sealing head, a lower sealing head and an upright barrel in the middle, wherein the top of the upper sealing head is externally connected with a waste water inlet pipe, the bottom of the lower sealing head is externally connected with a drain pipe and a drain pump, a conical nozzle is arranged on a horizontal water spraying plate close to the upper sealing head in the upright barrel, the conical nozzle is large in outlet aperture, waste water enters the tank after passing through the conical nozzle, and a part of waste water is flashed into steam and enters the evaporator through a steam inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910275724.XA CN110657601A (en) | 2019-04-01 | 2019-04-01 | Waste water direct-feeding lithium bromide absorption heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910275724.XA CN110657601A (en) | 2019-04-01 | 2019-04-01 | Waste water direct-feeding lithium bromide absorption heat pump unit |
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| CN110657601A true CN110657601A (en) | 2020-01-07 |
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| CN201910275724.XA Pending CN110657601A (en) | 2019-04-01 | 2019-04-01 | Waste water direct-feeding lithium bromide absorption heat pump unit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825369A (en) * | 2010-04-02 | 2010-09-08 | 清华大学 | High-efficiency compact high-temperature absorption type heat pump unit |
| CN102052799A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Device for producing low-temperature water by using waste heat |
| CN103512264A (en) * | 2013-09-28 | 2014-01-15 | 昆山市周市溴化锂溶液厂 | Lithium bromide flashing absorption type refrigerating machine |
| CN103808060A (en) * | 2014-02-17 | 2014-05-21 | 双良节能系统股份有限公司 | Two-stage absorption second-kind lithium bromide absorption heat pump unit with flash evaporator |
| CN205279512U (en) * | 2015-12-25 | 2016-06-01 | 双良节能系统股份有限公司 | Cold, hot water unit of flue gas hot water type lithium bromide absorption formula that heating normal atmospheric temperature is discharged fume |
| CN107178928A (en) * | 2017-06-23 | 2017-09-19 | 松下制冷（大连）有限公司 | A kind of exhaust heat of slag flushing water extraction type cold/hot water machine of lithium bromide group |
| KR101851230B1 (en) * | 2017-04-19 | 2018-04-23 | (주)월드이엔씨 | High efficiency absorption type heat pump system with increasing function for utilization rate from waste heat |
| CN210663442U (en) * | 2019-04-01 | 2020-06-02 | 哈尔滨工大金涛科技股有限公司 | Waste water direct-feeding lithium bromide absorption heat pump unit |
-
2019
- 2019-04-01 CN CN201910275724.XA patent/CN110657601A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052799A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Device for producing low-temperature water by using waste heat |
| CN101825369A (en) * | 2010-04-02 | 2010-09-08 | 清华大学 | High-efficiency compact high-temperature absorption type heat pump unit |
| CN103512264A (en) * | 2013-09-28 | 2014-01-15 | 昆山市周市溴化锂溶液厂 | Lithium bromide flashing absorption type refrigerating machine |
| CN103808060A (en) * | 2014-02-17 | 2014-05-21 | 双良节能系统股份有限公司 | Two-stage absorption second-kind lithium bromide absorption heat pump unit with flash evaporator |
| CN205279512U (en) * | 2015-12-25 | 2016-06-01 | 双良节能系统股份有限公司 | Cold, hot water unit of flue gas hot water type lithium bromide absorption formula that heating normal atmospheric temperature is discharged fume |
| KR101851230B1 (en) * | 2017-04-19 | 2018-04-23 | (주)월드이엔씨 | High efficiency absorption type heat pump system with increasing function for utilization rate from waste heat |
| CN107178928A (en) * | 2017-06-23 | 2017-09-19 | 松下制冷（大连）有限公司 | A kind of exhaust heat of slag flushing water extraction type cold/hot water machine of lithium bromide group |
| CN210663442U (en) * | 2019-04-01 | 2020-06-02 | 哈尔滨工大金涛科技股有限公司 | Waste water direct-feeding lithium bromide absorption heat pump unit |
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