CN215295422U - Heating type lithium bromide absorption heat pump unit - Google Patents
Heating type lithium bromide absorption heat pump unit Download PDFInfo
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- CN215295422U CN215295422U CN202120990276.4U CN202120990276U CN215295422U CN 215295422 U CN215295422 U CN 215295422U CN 202120990276 U CN202120990276 U CN 202120990276U CN 215295422 U CN215295422 U CN 215295422U
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- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
Abstract
The utility model relates to a heat pump technical field, in particular to type of heating lithium bromide absorption heat pump unit. The unit comprises a generator, a condenser, an absorber, an evaporator, a heat exchanger, a solution pump, a connecting pipeline, a valve and a control system, wherein the absorber, the heat exchanger, the generator and the corresponding connecting pipeline form a solution circulation loop, low-temperature waste heat is connected to the evaporator and the generator through a pipeline, hot water is connected to the absorber through a pipeline, cooling water is connected to the condenser through a pipeline, refrigerant in the condenser is sent to the evaporator through a pipeline and a refrigerant liquid sending pump, and the refrigerant in the evaporator is sent to the condenser through a condenser liquid returning pipeline and a throttling device. The utility model discloses the cryogen water in the heat pump set condenser passes through the cryogen and send the liquid pump to get into the evaporimeter circulation, and unnecessary cryogen water returns the liquid pipeline through the condenser and gets back to the condenser in the evaporimeter to reduced evaporimeter cryogen circulating pump, reduced unit running part, reduced system cost, can improve system reliability simultaneously.
Description
Technical Field
The utility model relates to a heat pump technical field, in particular to type of heating lithium bromide absorption heat pump unit.
Background
At present, a temperature-rising lithium bromide absorption heat pump unit takes a lithium bromide solution as an absorbent and water as a refrigerant, recovers process waste heat such as low-pressure steam, exhaust steam, hot water and the like, prepares high-temperature hot water or steam higher than the waste heat, is main energy comprehensive utilization equipment in the fields of industry, energy and the like, and is widely applied to the field of industrial waste heat recovery of the industries such as steel, petrifaction, chemical industry and the like.
The existing lithium bromide absorption heat pump unit has the following problems that on one hand, an evaporator refrigerant circulating pump is required to be arranged for refrigerant circulation (as shown in figure 1); on the other hand, the circulating water is circulated between the low-pressure absorber and the high-pressure evaporator through a circulating water pump, namely: the lithium bromide absorption heat pump unit is mainly applied to the factory process and generally operates throughout the year, if the system structure is complex and the number of operating components is large, the cost is high, the system operation reliability is not convenient to maintain, and therefore, in order to further improve the system reliability, how to reduce the operating components and adopting more reliable components to ensure the system reliability become the subject of the industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving current heat pump set running part more, the system architecture is complicated, with high costs and can influence the technical problem of system operational reliability, a temperature-raising type lithium bromide absorption heat pump set is provided, cryogen water in the unit condenser passes through cryogen liquid feed pump entering evaporimeter circulation, unnecessary cryogen water returns the liquid pipeline through the condenser and gets back to the condenser in the evaporimeter, thereby the evaporimeter cryogen circulating pump has been reduced, unit running part has been reduced, the system cost is reduced, and the system reliability can be improved simultaneously.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a temperature-raising lithium bromide absorption heat pump unit comprises a generator, a condenser, an absorber, an evaporator, a heat exchanger, a solution pump, a connecting pipeline, a valve and a control system, wherein the absorber, the heat exchanger, the generator and the corresponding connecting pipeline form a solution circulation loop, low-temperature waste heat is connected to the evaporator and the generator through pipelines, hot water is connected to the absorber through pipelines, cooling water is connected to the condenser through pipelines, refrigerant in the condenser is sent to the evaporator through a pipeline and a refrigerant liquid-sending pump, and refrigerant in the evaporator is sent to the condenser through a condenser liquid-returning pipeline and a throttling device.
Furthermore, the evaporator and the absorber are arranged in a cylinder, the generator and the condenser are arranged in a cylinder, and the cylinder in which the evaporator and the absorber are arranged is positioned above the cylinder in which the generator and the condenser are arranged.
Furthermore, the refrigerant in the condenser is pumped to a dripping device at the upper part of the evaporator through a pipeline and a refrigerant liquid feeding pump.
Furthermore, the evaporator comprises a low-pressure evaporator and a high-pressure evaporator, the absorber comprises a low-pressure absorber and a high-pressure absorber, the high-temperature heat exchanger, the low-pressure absorber, the heat exchanger, the generator and corresponding connecting pipelines form a solution circulation loop, refrigerant in the condenser is respectively sent to the high-pressure evaporator and the low-pressure evaporator through a pipeline and a refrigerant liquid sending pump, refrigerant in the high-pressure evaporator is sent to the low-pressure absorber through one part of the refrigerant circulation pipeline, one part of the refrigerant is sent to the low-pressure evaporator through a refrigerant control valve and a low-pressure evaporator liquid return pipeline, refrigerant in the low-pressure evaporator is sent to the condenser through a condenser liquid return pipeline and a throttling device, and high-temperature refrigerant prepared by the low-pressure absorber enters the high-pressure evaporator through the refrigerant pipeline.
Further, the high-pressure evaporator is provided with a liquid level monitoring device.
Furthermore, the high-pressure evaporator and the high-pressure absorber form a high-pressure cylinder, the low-pressure evaporator and the low-pressure absorber form a low-pressure cylinder, the high-pressure cylinder is located above the low-pressure cylinder, the generator and the condenser are arranged on one cylinder, and the low-pressure cylinder is located above the cylinder where the generator and the condenser are located.
Furthermore, a circulation quantity regulating valve is arranged on the refrigerant circulation pipeline.
Further, the circulation amount adjustment valve is a manual valve.
Furthermore, the heat pump unit also comprises a low-pressure evaporator valve and a high-pressure evaporator valve, wherein the low-pressure evaporator valve is arranged on a pipeline of the refrigerant leading to the low-pressure evaporator, and the high-pressure evaporator is arranged on a pipeline of the refrigerant leading to the high-pressure evaporator.
Further, the heat pump unit is suitable for single-stage, double-stage or multi-stage circulation.
The utility model discloses beneficial effect as follows:
(1) the utility model discloses the cryogen water in the heat pump set condenser passes through the cryogen and send the liquid pump to get into the evaporimeter circulation, and unnecessary cryogen water returns the liquid pipeline through the condenser and gets back to the condenser in the evaporimeter to reduced evaporimeter cryogen circulating pump, reduced unit running part, reduced system cost, can improve system reliability simultaneously.
(2) The utility model discloses circulation that doublestage circulating heat pump set high pressure evaporator and low pressure absorber constitute relies on the difference in height realization of high pressure evaporator and low pressure absorber, need not to set up the solution circulating pump between high pressure evaporator and low pressure absorber, also need not to install the heat exchange tube in the high pressure evaporator section of thick bamboo, has reduced the evaporimeter volume to circulating water system need not to set up expansion tank, and the system is simpler, and investment cost is lower.
(3) The utility model discloses doublestage circulation heat pump set passes through liquid level monitoring device, and coolant liquid level in the high pressure evaporator is guaranteed to circulation volume governing valve and cryogen control valve control refrigerant circulation volume.
Drawings
Fig. 1 shows a conventional temperature-raising lithium bromide absorption heat pump unit.
Fig. 2 shows the single-stage circulation heating type lithium bromide absorption heat pump unit of the present invention.
Fig. 3 shows the two-stage circulation heating type lithium bromide absorption heat pump unit of the present invention.
In the figure: 1. the system comprises a generator, 2, a condenser, 3, an absorber, 4, an evaporator, 5, a heat exchanger, 6, a solution pump, 7, a refrigerant liquid feeding pump, 8, an evaporator refrigerant circulating pump, 9, a condenser liquid return pipeline, 10, a low-pressure absorber, 11, a low-pressure evaporator, 12, a high-temperature heat exchanger, 13, a refrigerant circulating pipeline, 14, a low-pressure evaporator liquid return pipeline, 15, a low-pressure evaporator valve, 16, a high-pressure evaporator valve, 17, a refrigerant control valve, 18, a liquid level monitoring device, 19, a high-pressure absorber, 20, a high-pressure evaporator, A, a cooling water inlet, B, a cooling water outlet, C, a hot water inlet, D, a hot water outlet, E, a low-temperature waste heat inlet and F, a low-temperature waste heat outlet.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples, but the present invention is not limited to the specific examples.
Example 1
As shown in fig. 2, the single-stage heating-type lithium bromide absorption heat pump unit comprises a generator 1, a condenser 2, an absorber 3, an evaporator 4, a heat exchanger 5, a solution pump 6, a connecting pipeline, a valve, a cooling water inlet a, a cooling water outlet B, a hot water inlet C, a hot water outlet D, a low-temperature waste heat inlet E, a low-temperature waste heat outlet F and a control system, wherein the evaporator 4 and the absorber 3 are arranged in a cylinder, the generator 1 and the condenser 2 are arranged in a cylinder, the cylinder in which the evaporator 4 and the absorber 3 are arranged is positioned above the cylinder in which the generator 1 and the condenser 2 are arranged, the absorber 3, the heat exchanger 5, the generator 1 and the corresponding connecting pipeline form a solution circulation loop, the low-temperature waste heat is connected to the evaporator 4 and the generator 1 through a pipeline, the hot water is connected to the absorber 3 through a pipeline, the cooling water is connected to the condenser 2 through a pipeline, and a refrigerant in the condenser 2 is sent to a dripping device at the upper part of the evaporator 4 through a pipeline and a refrigerant liquid sending pump 7, the refrigerant in the evaporator 4 is sent to the condenser 2 through the condenser liquid return pipeline 9 and the throttling device.
The operation process of the unit is as follows: low-temperature waste heat (low-pressure steam, exhaust steam, hot water and the like) enters the generator 1 to heat the lithium bromide dilute solution which comes from the absorber 3 and passes through the heat exchanger 5, the lithium bromide dilute solution in the generator 1 boils under low pressure to evaporate refrigerant steam, and meanwhile, the lithium bromide dilute solution is changed into concentrated solution; in the condenser 2, cooling circulating water is introduced into the pipe, refrigerant steam is condensed into refrigerant water, and the low pressure of the generator 1 is ensured; the concentrated lithium bromide solution enters the absorber 3 after being circulated by the solution pump 6 and heated by the heat exchanger 5, the pressure of the absorber 3 is higher than that of the generator 1, the concentrated solution in the absorber 3 absorbs refrigerant steam from the evaporator 4, the saturation temperature is increased, heat is transferred to hot water in the tube, and the concentrated lithium bromide solution is changed into dilute solution; in the evaporator 4, external low-temperature waste heat is introduced into low-pressure refrigerant water outside the heating pipe in the pipe, and the refrigerant water is evaporated into refrigerant steam.
The lithium bromide dilute solution naturally flows by means of the pressure difference and the height difference between the absorber 3 and the generator 1, and the lithium bromide concentrated solution circulates by means of the solution pump 6; the refrigerant water enters the evaporator 4 through the refrigerant liquid feeding pump 7 to circulate, in order to ensure the surface of a heat exchange tube of the evaporator to be fully evaporated, the amount of the refrigerant entering the evaporator 4 to circulate is about 3 times of the evaporation capacity, in order to ensure the circulation, the redundant refrigerant water in the evaporator 4 returns to the condenser 2 through the condenser liquid returning pipeline 9, the evaporator 4 and the condenser 2 have pressure difference and height difference, and the condenser liquid returning pipeline 9 is provided with a throttling device.
Example 2
As shown in fig. 3, the heat pump unit of this embodiment has a structure substantially the same as that of the heat pump unit of embodiment 1, except that the heat pump unit of this embodiment adopts a two-stage circulation structure, the evaporator includes a low-pressure evaporator 11 and a high-pressure evaporator 20, the absorber includes a low-pressure absorber 10 and a high-pressure absorber 19, the high-pressure evaporator 20 and the high-pressure absorber 19 form a high-pressure cylinder, the low-pressure evaporator 11 and the low-pressure absorber 10 form a low-pressure cylinder, the high-pressure cylinder is located above the low-pressure cylinder, the generator 1 and the condenser 2 are arranged in a cylinder, the low-pressure cylinder is located above the cylinder where the generator 1 and the condenser 2 are located, the high-pressure absorber 19, the high-temperature heat exchanger 12, the low-pressure absorber 10, the heat exchanger 5, the generator 1 and corresponding connecting pipelines form a solution circulation loop, and the refrigerant in the condenser 2 is respectively sent to the high-pressure evaporator 20 and a dripping device at the upper portion of the low-pressure evaporator 11 through the pipelines and the refrigerant pump 7 Refrigerant in the high-pressure evaporator 20 is partially sent to the low-pressure absorber 10 through a refrigerant circulation pipeline 13, a part of the refrigerant is sent to the low-pressure evaporator 11 through a refrigerant control valve 17 and a low-pressure evaporator liquid return pipeline 14, refrigerant in the low-pressure evaporator 11 is sent to the condenser 2 through a condenser liquid return pipeline 9 and a throttling device, and high-temperature refrigerant prepared by the low-pressure absorber 10 enters the high-pressure evaporator 20 through a refrigerant pipeline.
The heat pump unit further comprises a low-pressure evaporator valve 15 and a high-pressure evaporator valve 16, the low-pressure evaporator valve 15 is arranged on a pipeline of the refrigerant leading to the low-pressure evaporator 11, the high-pressure evaporator 16 is arranged on a pipeline of the refrigerant leading to the high-pressure evaporator 20, and the low-pressure evaporator valve 15 and the high-pressure evaporator valve 16 guarantee the pressure difference between the high-pressure evaporator 20 and the low-pressure evaporator 11.
Preferably, the high pressure evaporator 20 is provided with a level monitoring device 18 for monitoring the refrigerant level in the high pressure evaporator 20.
Preferably, the refrigerant circulation line 13 is provided with a circulation amount adjusting valve, and the circulation amount adjusting valve is a manual valve.
The operation process of the unit is as follows: low-temperature waste heat (low-pressure steam, exhaust steam, hot water and the like) enters the generator 1 to heat the lithium bromide dilute solution which comes from the low-pressure absorber 10 and passes through the heat exchanger 5, the lithium bromide dilute solution in the generator 1 boils under low pressure to evaporate refrigerant steam, and meanwhile, the lithium bromide dilute solution is changed into concentrated solution; in the condenser 2, cooling circulating water is introduced into the pipe, refrigerant steam is condensed into refrigerant water, and the low pressure of the generator is ensured; the lithium bromide concentrated solution enters a high-pressure absorber 19 after being circulated by a solution pump 6, heated by a heat exchanger 5 and a high-temperature heat exchanger 12, the pressure of the high-pressure absorber 19 is higher than that of the generator 1, the concentrated solution in the high-pressure absorber 19 absorbs refrigerant steam from a high-pressure evaporator 20, the saturation temperature is increased, heat is transferred to hot water in a pipe, and the lithium bromide concentrated solution is changed into an intermediate solution; the refrigerant water sent into the high-pressure evaporator 20 is reduced in pressure and directly evaporated into refrigerant steam; the intermediate solution from the high-pressure absorber 19 enters the low-pressure absorber 10 through the high-temperature heat exchanger 12, and in the low-pressure absorber 10, the lithium bromide intermediate solution absorbs refrigerant steam of the low-pressure evaporator 11 and becomes a lithium bromide dilute solution; in the low-pressure evaporator 11, external low-temperature waste heat is introduced into low-pressure refrigerant water outside the heating pipe in the pipe, and the refrigerant water is evaporated into refrigerant steam.
The lithium bromide dilute solution naturally flows by means of the pressure difference and the height difference between the low-pressure absorber 10 and the generator 1, the lithium bromide intermediate solution naturally flows by means of the pressure difference and the height difference between the high-pressure absorber 19 and the low-pressure absorber 10, and the lithium bromide concentrated solution circulates by means of the solution pump 6; refrigerant water enters the low-pressure evaporator 11 for circulation through the refrigerant liquid feeding pump 7, the other part of the refrigerant water is supplemented as refrigerant of the high-pressure evaporator 20, in order to ensure that the surface of a heat exchange tube of the low-pressure evaporator 11 is fully evaporated, the amount of the refrigerant entering the low-pressure evaporator 11 for circulation is about 3 times of the evaporation capacity, in order to ensure circulation, redundant refrigerant water in the low-pressure evaporator 11 returns to the condenser 2 through a condenser liquid return pipeline 9, the low-pressure evaporator 11 and the condenser 2 have pressure difference and height difference, a throttling device is arranged on the condenser liquid return pipeline 9, and a low-pressure evaporator valve 15 and a high-pressure evaporator valve 16 are arranged for ensuring the pressure difference between the high-pressure evaporator 20 and the low-pressure evaporator 11.
The utility model discloses the cryogen water in the heat pump set condenser passes through the cryogen and send the liquid pump to get into the evaporimeter circulation, and unnecessary cryogen water returns the liquid pipeline through the condenser and gets back to the condenser in the evaporimeter to reduced evaporimeter cryogen circulating pump, reduced unit running part, reduced system cost, can improve system reliability simultaneously, be applicable to single-stage, doublestage or multistage circulation.
The utility model discloses doublestage heat pump set passes through high pressure evaporator liquid level monitoring device, cryogen circulation pipeline and low-pressure section of thick bamboo realize the cryogen circulation with the difference in height of a high-pressure section of thick bamboo, set up the circulation volume governing valve on the cryogen circulation pipeline, when the high pressure evaporator liquid level is low, guarantee the liquid level through cryogen control valve and circulation volume governing valve regulation, cryogen water is heated in low pressure absorber and is heaied up and become the steam-water mixture and carry out direct flash-fire in getting into high pressure evaporator again, cryogen steam after the flash-fire gets into high pressure absorber and is absorbed by lithium bromide solution, high pressure evaporator's cryogen water temperature reduces, then get into low pressure absorber heating and heaies up, need not to set up the circulating pump between high pressure evaporator and the low pressure absorber, and need not to set up the heat-transfer pipe in the high pressure evaporator, the heat-transfer pipe of evaporimeter has both been saved like this, reduce the evaporimeter volume, improve system reliability again.
The utility model discloses only explain with present common single-stage and doublestage circulation and structural arrangement, other structural style and multistage circulation process the utility model discloses an use and all can reach corresponding purpose, the utility model discloses do not explain respectively.
The above description is further detailed in connection with the preferred embodiments of the present invention, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses a under the prerequisite of the design, can also make simple deduction and replacement, all should regard as the utility model discloses a protection scope.
Claims (10)
1. A temperature-raising lithium bromide absorption heat pump unit is characterized in that: the low-temperature waste heat recovery system comprises a generator, a condenser, an absorber, an evaporator, a heat exchanger, a solution pump, a connecting pipeline, a valve and a control system, wherein the absorber, the heat exchanger, the generator and the corresponding connecting pipeline form a solution circulation loop, low-temperature waste heat is connected to the evaporator and the generator through a pipeline, hot water is connected to the absorber through a pipeline, cooling water is connected to the condenser through a pipeline, refrigerant in the condenser is sent to the evaporator through a pipeline and a refrigerant liquid sending pump, and the refrigerant in the evaporator is sent to the condenser through a condenser liquid returning pipeline and a throttling device.
2. The heating type lithium bromide absorption heat pump unit according to claim 1, characterized in that: the evaporator and the absorber are arranged on a cylinder, the generator and the condenser are arranged on a cylinder, and the cylinder where the evaporator and the absorber are located is located above the cylinder where the generator and the condenser are located.
3. The heating type lithium bromide absorption heat pump unit according to claim 1, characterized in that: and the refrigerant in the condenser is sent to a dripping device at the upper part of the evaporator through a pipeline and a refrigerant liquid-sending pump.
4. The heating type lithium bromide absorption heat pump unit according to claim 1, characterized in that: the evaporator comprises a low-pressure evaporator and a high-pressure evaporator, the absorber comprises a low-pressure absorber and a high-pressure absorber, the high-pressure absorber, a high-temperature heat exchanger, the low-pressure absorber, the heat exchanger, a generator and corresponding connecting pipelines form a solution circulation loop, refrigerant in the condenser is respectively sent to the high-pressure evaporator and the low-pressure evaporator through a pipeline and a refrigerant liquid sending pump, refrigerant in the high-pressure evaporator is sent to the low-pressure absorber through a part of the refrigerant circulation pipeline, a part of the refrigerant is sent to the low-pressure evaporator through a refrigerant control valve and a low-pressure evaporator liquid return pipeline, refrigerant in the low-pressure evaporator is sent to the condenser through a condenser liquid return pipeline and a throttling device, and high-temperature refrigerant prepared by the low-pressure absorber enters the high-pressure evaporator through the refrigerant pipeline.
5. The heating type lithium bromide absorption heat pump unit according to claim 4, characterized in that: the high-pressure evaporator is provided with a liquid level monitoring device.
6. The heating type lithium bromide absorption heat pump unit according to claim 4, characterized in that: the high-pressure evaporator and the high-pressure absorber form a high-pressure cylinder, the low-pressure evaporator and the low-pressure absorber form a low-pressure cylinder, the high-pressure cylinder is located above the low-pressure cylinder, the generator and the condenser are arranged on one cylinder, and the low-pressure cylinder is located above the cylinder where the generator and the condenser are located.
7. The heating type lithium bromide absorption heat pump unit according to claim 4, characterized in that: and a circulation quantity regulating valve is arranged on the refrigerant circulation pipeline.
8. The heating type lithium bromide absorption heat pump unit according to claim 7, characterized in that: the circulation quantity regulating valve is a manual valve.
9. The heating type lithium bromide absorption heat pump unit according to claim 4, characterized in that: the heat pump unit also comprises a low-pressure evaporator valve and a high-pressure evaporator valve, wherein the low-pressure evaporator valve is arranged on a pipeline leading the refrigerant to the low-pressure evaporator, and the high-pressure evaporator is arranged on a pipeline leading the refrigerant to the high-pressure evaporator.
10. The heating type lithium bromide absorption heat pump unit according to claim 1, characterized in that: the heat pump unit is suitable for single-stage, double-stage or multi-stage circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120990276.4U CN215295422U (en) | 2021-05-11 | 2021-05-11 | Heating type lithium bromide absorption heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120990276.4U CN215295422U (en) | 2021-05-11 | 2021-05-11 | Heating type lithium bromide absorption heat pump unit |
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| CN215295422U true CN215295422U (en) | 2021-12-24 |
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| CN202120990276.4U Active CN215295422U (en) | 2021-05-11 | 2021-05-11 | Heating type lithium bromide absorption heat pump unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114322357A (en) * | 2021-12-29 | 2022-04-12 | 北京华源泰盟节能设备有限公司 | Two-stage natural circulation steam production heating type heat pump unit |
-
2021
- 2021-05-11 CN CN202120990276.4U patent/CN215295422U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114322357A (en) * | 2021-12-29 | 2022-04-12 | 北京华源泰盟节能设备有限公司 | Two-stage natural circulation steam production heating type heat pump unit |
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Address after: 116000 No. 117, 118, Huaihe West Road, Dalian Economic and Technological Development Zone, Liaoning Province (No. 10, Songlan Street) Patentee after: Bingshan Songyang Refrigeration (Dalian) Co.,Ltd. Address before: 116000 No. 117, 118, Huaihe West Road, Dalian Economic and Technological Development Zone, Liaoning Province (No. 10, Songlan Street) Patentee before: PANASONIC REFRIGERATION (DALIAN) CO.,LTD. |
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