Low-temperature hot water type high-performance lithium bromide hot water unit circulating system

Abstract

The application discloses a low-temperature hot water type high-performance lithium bromide hot water unit circulating system, which comprises a primary high-temperature barrel, a secondary high-temperature barrel, a low-temperature barrel and a heat exchanger, the primary high-temperature barrel is provided with a cooling water inlet and a heat source water inlet, the secondary high-temperature barrel is provided with a heat source water outlet and a cooling water outlet, the low-temperature barrel is provided with a cold water inlet and a cold water outlet, a cooling water pipeline is sequentially connected with the primary high-temperature barrel, the low-temperature barrel and the secondary high-temperature barrel, and the refrigerant is communicated with the primary high-temperature barrel, the secondary high-temperature barrel and the low-temperature barrel through a solution pump, the heat exchanger and the solution pump respectively and forms a circulating passage. The application can guarantee the maximum heat exchange capacity under the same heat exchange area, the two high-temperature barrels are arranged on the structure, the unit performance is improved by nearly 50%, and the return water temperature of the heat source water under super-low temperature (less than 55 DEG C) is met.

Description

Technical Field

[0001] This invention relates to the technical field of absorption refrigeration cycle systems, and in particular to a low-temperature hot water type high-performance lithium bromide hot water unit cycle system. Background Technology

[0002] Traditional absorption refrigerant systems consist of an evaporator, absorber, generator, secondary condenser, solution heat exchanger, and connected piping. The generator produces steam driven by a heat source water, which enters the secondary condenser. The steam condenses in the secondary condenser, and the refrigerant water then enters the evaporator. The refrigerant water evaporates again in the evaporator, producing steam which enters the absorber and condenses there. A dilute solution produced in the absorber is heated in the solution heat exchanger before entering the generator. A concentrated solution is heated in the generator, cooled in the solution heat exchanger, and then enters the absorber.

[0003] In the traditional absorption chiller circulation mode described above, the generator's heat source water outlet temperature must be maintained at a reasonable level to ensure the release of gas from the lithium bromide solution. When the outlet temperature of the driving hot water is very low, the ability of the generator to release gas from the lithium bromide solution and the absorption capacity of the absorber become extremely difficult; the generator cannot generate gas and cannot release gas, and even increasing the heat exchange area cannot meet the heat exchange requirements, affecting the application conditions and scope of the absorption chiller circulation system. This is mainly because the lithium bromide solution generated by the low-pressure absorber cannot generate gas under low-temperature driving hydrothermal conditions, failing to guarantee the return water temperature of the unit's heat source water and reducing the unit's COP efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a low-temperature hot water type high-performance lithium bromide hot water unit circulation system to solve the problems existing in the prior art, so as to make the heat source water return water temperature of the unit lower and improve the COP efficiency of the unit.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a low-temperature hot water type high-performance lithium bromide hot water unit circulation system, including a primary high-temperature tank, a secondary high-temperature tank, a low-temperature tank, and a heat exchanger. The primary high-temperature tank is provided with a cooling water inlet and a heat source water inlet. The secondary high-temperature tank is provided with a heat source water outlet and a cooling water outlet. The low-temperature tank is provided with a cold water inlet and a cold water outlet. The cooling water pipeline is sequentially connected to the primary high-temperature tank, the low-temperature tank, and the secondary high-temperature tank. The refrigerant is connected to the primary high-temperature tank, the secondary high-temperature tank, and the low-temperature tank through a solution pump, a heat exchanger, and a solution pump, respectively, forming a circulation path.

[0007] Preferably, the primary high-temperature tank includes a primary condenser and a GM regenerator. A water collection tank is provided at the bottom of the primary condenser and the GM regenerator respectively. A baffle plate is provided between the primary condenser and the GM regenerator. The baffle plate is located in the space above the two water collection tanks. One end of the primary condenser is connected to the cooling water inlet and the other end is connected to the low-temperature tank through a pipeline. One end of the GM regenerator is connected to the heat source water inlet and the other end is connected to the secondary high-temperature tank through a pipeline.

[0008] Preferably, the GM regenerator is provided with a spray mechanism at the top, the spray mechanism is connected to the water collection tank, the water collection tank is connected through the heat exchanger, a solution pump is provided between the water collection tank at the bottom of the high-pressure absorber and the heat exchanger, and the heat source water inlet is provided on the high-pressure regenerator.

[0009] Preferably, the high-temperature tank is equipped with a low-pressure regenerator, a high-pressure absorber, a high-pressure regenerator, and a secondary condenser. A water collection tank is provided at the bottom of each of the low-pressure regenerator, the high-pressure absorber, the high-pressure regenerator, and the secondary condenser. A spray mechanism communicating with the water collection tank is provided at the top of each of the low-pressure regenerator, the high-pressure absorber, and the high-pressure regenerator. The low-pressure regenerator and the high-pressure regenerator, and the secondary condenser and the high-pressure absorber are respectively connected by pipelines. The high-pressure regenerator and the secondary condenser, and the low-pressure absorber are connected by pipelines. A baffle plate is provided between the high-pressure regenerator and the high-pressure absorber. The cooling water outlet is located on the secondary condenser, and the heat source water outlet is located on the low-pressure regenerator. The high-pressure regenerator and the GM regenerator are connected by a pipeline. The high-pressure absorber and the low-temperature tank are connected by a pipeline. The water collection tank at the bottom of the high-pressure absorber and the spray mechanism at the top of the high-pressure regenerator are connected by a solution pump. The water collection tank at the bottom of the high-pressure regenerator and the spray mechanism at the top of the high-pressure absorber are connected, and a heat exchanger is provided between the two connecting pipelines.

[0010] Preferably, the low-temperature tank is equipped with an evaporator and a low-pressure absorber. The top of the evaporator and the low-pressure absorber are respectively equipped with a spray mechanism, and the bottom of the evaporator and the low-pressure absorber are respectively equipped with a water collection tank. A baffle plate is provided between the evaporator and the low-pressure absorber. One end of the low-pressure absorber is connected to the high-pressure absorber through a pipeline, and the other end is connected to the primary condenser through a pipeline. The low-pressure absorber is equipped with a cold water inlet and a cold water outlet. The spray mechanism at the top of the evaporator and the water collection tank at the bottom are connected through a refrigerant pump. The water collection tank at the bottom of the low-pressure regenerator is connected to the spray mechanism at the top of the low-pressure absorber through a pipeline.

[0011] Preferably, the water collection tank of the primary condenser is connected to the water collection tank at the bottom of the evaporator, and the water collection tank at the bottom of the low-pressure absorber is connected to the spray mechanism at the top of the low-pressure regenerator and the spray mechanism at the top of the GM regenerator respectively through pipelines and a solution pump. The water collection tanks at the bottom of the low-pressure regenerator and the bottom of the GM regenerator are both connected to the spray mechanism at the top of the low-pressure absorber through pipelines, and a heat exchanger is provided between adjacent heat exchange pipelines.

[0012] Preferably, the water collection tanks of the primary condenser and the secondary condenser are both connected to the water collection tank at the bottom of the evaporator. The water collection tank at the bottom of the low-pressure absorber is connected to the spray mechanism at the top of the GM regenerator via a pipeline and a solution pump. The water collection tank at the bottom of the GM regenerator is connected to the spray mechanism at the top of the low-pressure regenerator via a pipeline. The water collection tank at the bottom of the low-pressure regenerator is connected to the spray mechanism at the top of the low-pressure absorber via a pipeline. Furthermore, a heat exchanger is provided between adjacent heat exchangeable pipelines.

[0013] Preferably, the water collection tanks of the primary condenser and the secondary condenser are both connected to the water collection tank at the bottom of the evaporator. The water collection tank at the bottom of the low-pressure absorber is connected to the spray mechanism at the top of the GM regenerator via a pipeline and a solution pump. The water collection tank at the bottom of the low-pressure regenerator is connected to the spray mechanism at the top of the GM regenerator via a pipeline. A heat exchanger is provided between adjacent heat exchange pipelines.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] This invention can guarantee the maximum heat exchange under the same heat exchange area. It is structurally designed with two high-temperature tanks, which improves the unit performance by nearly 50%, while also meeting the return water temperature requirements of ultra-low temperature (<55℃) heat source water. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the first structure of the circulating system of the low-temperature hot water type high-performance lithium bromide hot water unit of the present invention;

[0018] Figure 2 This is a schematic diagram of the second type of circulating system for a low-temperature hot water type high-performance lithium bromide hot water unit according to the present invention;

[0019] Figure 3 This is a schematic diagram of the third type of circulating system for a low-temperature hot water type high-performance lithium bromide hot water unit according to the present invention;

[0020] Among them: 1-Primary high temperature tank, 2-Primary condenser, 3-GM regenerator, 4-Secondary high temperature tank, 5-Secondary condenser, 6-Low pressure regenerator, 7-High pressure regenerator, 8-High pressure absorber, 9-Low temperature tank, 10-Evaporator, 11-Low pressure absorber, 12-Heat exchanger, 13-Spraying mechanism, 14-Water collection tank, 15-Baffle plate, 16-Solution pump, 17-Refrigerant pump. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a low-temperature hot water type high-performance lithium bromide hot water unit circulation system to solve the problems existing in the prior art, so as to make the heat source water return water temperature of the unit lower and improve the COP efficiency of the unit.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1 As shown: This embodiment provides a low-temperature hot water type high-performance lithium bromide hot water unit circulation system, including a primary high-temperature tank 1, a secondary high-temperature tank 4, a low-temperature tank 9, and a heat exchanger 12. The primary high-temperature tank 1 is provided with a cooling water inlet and a heat source water inlet. The secondary high-temperature tank 4 is provided with a heat source water outlet and a cooling water outlet. The low-temperature tank 9 is provided with a cold water inlet and a cold water outlet. The cooling water pipeline is connected to the primary high-temperature tank 1, the low-temperature tank 9, and the secondary high-temperature tank 4 in sequence. The refrigerant is connected to the primary high-temperature tank 1, the secondary high-temperature tank 4, and the low-temperature tank 9 through a solution pump 16, a heat exchanger 12, and a solution pump 16 respectively to form a circulation path.

[0026] The primary high-temperature tank 1 includes a primary condenser 2 and a GM regenerator 3. A water collection tank 14 is respectively installed at the bottom of the primary condenser 2 and the GM regenerator 3. A baffle plate 15 is installed between the primary condenser 2 and the GM regenerator 3, located in the space above the two water collection tanks 14. One end of the primary condenser 2 is connected to a cooling water inlet, and the other end is connected to a low-temperature tank 9 via a pipeline. One end of the GM regenerator 3 is connected to a heat source water inlet, and the other end is connected to a secondary high-temperature tank 4 via a pipeline. A spray mechanism 13 is installed at the top of the GM regenerator 3, and the spray mechanism 13 is connected to the water collection tank 14. The water collection tank 14 is connected via a heat exchanger 12. A solution pump 16 is installed between the water collection tank 14 at the bottom of the high-pressure absorber 8 and the heat exchanger 12. The heat source water inlet is located on the high-pressure regenerator 7.

[0027] The high-temperature tank is equipped with a low-pressure regenerator 6, a high-pressure absorber 8, a high-pressure regenerator 7, and a secondary condenser 5. A water collection tank 14 is installed at the bottom of each of the three regenerators. A spray mechanism 13, connected to the water collection tank 14, is installed at the top of each of the three regenerators. The low-pressure regenerator 6 and high-pressure regenerator 7, and the secondary condenser 5 and high-pressure absorber 8, are connected by pipelines. The high-pressure regenerator 7 and secondary condenser 5, and the low-pressure regenerator 6 and high-pressure regenerator 7, are connected by pipelines. A baffle plate 15 is provided between the high-pressure absorber 8 and the high-pressure absorber 8. The cooling water outlet is located on the secondary condenser 5, and the heat source water outlet is located on the low-pressure regenerator 6. The high-pressure regenerator 7 and the GM regenerator 3 are connected by a pipeline. The high-pressure absorber 8 and the low-temperature tank 9 are connected by a pipeline. The water collection tank 14 at the bottom of the high-pressure absorber 8 and the spray mechanism 13 at the top of the high-pressure regenerator 7 are connected by a solution pump 16. The water collection tank 14 at the bottom of the high-pressure regenerator 7 and the spray mechanism 13 at the top of the high-pressure absorber 8 are connected by a heat exchanger 12 between the two connecting pipelines.

[0028] The low-temperature tank 9 is equipped with an evaporator 10 and a low-pressure absorber 11. The top of the evaporator 10 and the low-pressure absorber 11 are respectively equipped with a spray mechanism 13 and the bottom of the evaporator 10 and the low-pressure absorber 11 are respectively equipped with a water collection tank 14. A baffle plate 15 is provided between the evaporator 10 and the low-pressure absorber 11. One end of the low-pressure absorber 11 is connected to the high-pressure absorber 8 through a pipeline, and the other end is connected to the primary condenser 2 through a pipeline. The low-pressure absorber 11 is equipped with a cold water inlet and a cold water outlet. The spray mechanism 13 at the top of the evaporator 10 and the water collection tank 14 at the bottom are connected through a refrigerant pump 17. The water collection tank 14 at the bottom of the low-pressure regenerator 6 is connected to the spray mechanism 13 at the top of the low-pressure absorber 11 through a pipeline.

[0029] The water collection tank 14 of the primary condenser 2 is connected to the water collection tank 14 at the bottom of the evaporator 10. The water collection tank 14 at the bottom of the low-pressure absorber 11 is connected to the spray mechanism 13 at the top of the low-pressure regenerator 6 and the spray mechanism 13 at the top of the GM regenerator 3 through pipelines and a solution pump 16. The water collection tank 14 at the bottom of the low-pressure regenerator 6 and the water collection tank 14 at the bottom of the GM regenerator 3 are both connected to the spray mechanism 13 at the top of the low-pressure absorber 11 through pipelines. A heat exchanger 12 is provided between adjacent heat exchange pipelines.

[0030] The operating cycles of the various water sources and refrigerants in this embodiment are as follows:

[0031] The heat source water sequentially enters the GM regenerator 3, high-pressure regenerator 7, and low-pressure regenerator 6 before flowing out; the cooling water enters the low-pressure absorber 11, passes through the high-pressure absorber 8, and finally flows out through the secondary condenser 5. The lithium bromide solution in the low-pressure absorber 11 combines with the primary high-pressure absorber 8 to generate steam. The dilute lithium bromide solution produced in the low-pressure absorber 11 also generates steam when it enters the low-pressure regenerator 6. Simultaneously, the dilute lithium bromide solution produced inside the high-pressure absorber 8 can generate steam inside the high-pressure regenerator 7. This ensures the circulation of both dilute and concentrated lithium bromide solutions to meet the cooling requirements when driven by low-pressure hot water.

[0032] Example 2

[0033] like Figure 2 As shown: In this embodiment, the circulation system differs from that in Embodiment 1 in that the water collection tanks 14 of the primary condenser 2 and the secondary condenser 5 are both connected to the water collection tank 14 at the bottom of the evaporator 10. The water collection tank 14 at the bottom of the low-pressure absorber 11 is connected to the spray mechanism 13 at the top of the GM regenerator 3 through a pipeline and a solution pump 16. The water collection tank 14 at the bottom of the GM regenerator 3 is connected to the spray mechanism 13 at the top of the low-pressure regenerator 6 through a pipeline. The water collection tank 14 at the bottom of the low-pressure regenerator 6 is connected to the spray mechanism 13 at the top of the low-pressure absorber 11 through a pipeline. Furthermore, a heat exchanger 12 is provided between adjacent heat exchangeable pipelines.

[0034] Example 3

[0035] like Figure 3 As shown: In this embodiment, the circulation system differs from that in Embodiment 1 in that the water collection tanks 14 of the primary condenser 2 and the secondary condenser 5 are both connected to the water collection tank 14 at the bottom of the evaporator 10. The water collection tank 14 at the bottom of the low-pressure absorber 11 is connected to the spray mechanism 13 at the top of the GM regenerator 3 through a pipeline and a solution pump 16. The water collection tank 14 at the bottom of the low-pressure regenerator 6 is connected to the spray mechanism 13 at the top of the GM regenerator 3 through a pipeline. Furthermore, a heat exchanger 12 is provided between adjacent heat exchange pipelines.

[0036] Based on the temperature of the cold water inlet and the temperature of the heat source water inlet, the ease of heat exchange can be calculated, and different circulation loops can be selected to reduce the difficulty of steam generation and the return water temperature of the heat source water, thereby improving the utilization efficiency of the heat source water. At the same time, the unit performance is improved by nearly 50%, while also meeting the return water temperature requirements of ultra-low temperature heat source water (<55℃).

[0037] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A low-temperature hot water type high-performance lithium bromide hot water unit circulation system, characterized in that: The system includes a primary high-temperature tank, a secondary high-temperature tank, a low-temperature tank, and a heat exchanger. The primary high-temperature tank is equipped with a cooling water inlet and a heat source water inlet. The secondary high-temperature tank is equipped with a heat source water outlet and a cooling water outlet. The low-temperature tank is equipped with a cold water inlet and a cold water outlet. Cooling water pipelines are sequentially connected to the primary high-temperature tank, the low-temperature tank, and the secondary high-temperature tank. Refrigerant is connected to the primary high-temperature tank, the secondary high-temperature tank, and the low-temperature tank through a solution pump, a heat exchanger, and a solution pump, respectively, forming a circulation path. The primary high-temperature tank includes a primary condenser and a GM regenerator. A water collection tank is provided at the bottom of the primary condenser and the GM regenerator respectively. A baffle plate is provided between the primary condenser and the GM regenerator. The baffle plate is located in the space above the two water collection tanks. One end of the primary condenser is connected to the cooling water inlet and the other end is connected to the low-temperature tank through a pipeline. One end of the GM regenerator is connected to the heat source water inlet and the other end is connected to the secondary high-temperature tank through a pipeline. The high-temperature tank is equipped with a low-pressure regenerator, a high-pressure absorber, a high-pressure regenerator, and a secondary condenser. A water collection tank is located at the bottom of each of the low-pressure regenerator, the high-pressure absorber, the high-pressure regenerator, and the secondary condenser. A spray mechanism connected to the water collection tank is located at the top of each of the low-pressure regenerator, the high-pressure absorber, and the high-pressure regenerator. Pipes connect the low-pressure regenerator and the high-pressure regenerator, and the secondary condenser and the high-pressure absorber. Pipes also connect the high-pressure regenerator and the secondary condenser. A baffle plate is provided between the generator and the high-pressure absorber. The cooling water outlet is located on the secondary condenser, and the heat source water outlet is located on the low-pressure regenerator. The high-pressure regenerator and the GM regenerator are connected by a pipeline. The high-pressure absorber and the low-temperature tank are connected by a pipeline. The water collection tank at the bottom of the high-pressure absorber and the spray mechanism at the top of the high-pressure regenerator are connected by a solution pump. The water collection tank at the bottom of the high-pressure regenerator and the spray mechanism at the top of the high-pressure absorber are connected, and a heat exchanger is provided between the two connecting pipelines. The low-temperature tank is equipped with an evaporator and a low-pressure absorber. The top of the evaporator and the low-pressure absorber are respectively equipped with a spray mechanism, and the bottom of each is equipped with a water collection tank. A baffle plate is installed between the evaporator and the low-pressure absorber. One end of the low-pressure absorber is connected to the high-pressure absorber through a pipeline, and the other end is connected to the primary condenser through a pipeline. The low-pressure absorber is equipped with a cold water inlet and a cold water outlet. The spray mechanism at the top of the evaporator and the water collection tank at the bottom are connected through a refrigerant pump. The water collection tank at the bottom of the low-pressure regenerator is connected to the spray mechanism at the top of the low-pressure absorber through a pipeline.

2. The low-temperature hot water type high-performance lithium bromide hot water unit circulation system according to claim 1, characterized in that: The GM regenerator is equipped with a spray mechanism at the top, which is connected to the water collection tank. The water collection tank is connected to the heat exchanger. A solution pump is installed between the water collection tank at the bottom of the high-pressure absorber and the heat exchanger. The heat source water inlet is located on the GM regenerator.

3. The low-temperature hot water type high-performance lithium bromide hot water unit circulation system according to claim 1, characterized in that: The water collection tank of the primary condenser is connected to the water collection tank at the bottom of the evaporator. The water collection tank at the bottom of the low-pressure absorber is connected to the spray mechanism at the top of the low-pressure regenerator and the spray mechanism at the top of the GM regenerator via pipelines and a solution pump, respectively. The water collection tanks at the bottom of the low-pressure regenerator and the bottom of the GM regenerator are both connected to the spray mechanism at the top of the low-pressure absorber via pipelines. A heat exchanger is provided between adjacent heat exchange pipelines.

4. The low-temperature hot water type high-performance lithium bromide hot water unit circulation system according to claim 1, characterized in that: The water collection tanks of the primary condenser and the secondary condenser are both connected to the water collection tank at the bottom of the evaporator. The water collection tank at the bottom of the low-pressure absorber is connected to the spray mechanism at the top of the GM regenerator via a pipeline and a solution pump. The water collection tank at the bottom of the GM regenerator is connected to the spray mechanism at the top of the low-pressure regenerator via a pipeline. The water collection tank at the bottom of the low-pressure regenerator is connected to the spray mechanism at the top of the low-pressure absorber via a pipeline. A heat exchanger is provided between adjacent heat exchange pipelines.

5. The low-temperature hot water type high-performance lithium bromide hot water unit circulation system according to claim 1, characterized in that: The water collection tanks of the primary condenser and the secondary condenser are both connected to the water collection tank at the bottom of the evaporator. The water collection tank at the bottom of the low-pressure absorber is connected to the spray mechanism at the top of the GM regenerator via a pipeline and a solution pump. The water collection tank at the bottom of the low-pressure regenerator is connected to the spray mechanism at the top of the GM regenerator via a pipeline. A heat exchanger is provided between adjacent heat exchange pipelines.

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