Absorption unit capable of switching heat source types

Abstract

The utility model belongs to the technical field of heat exchange equipment, and discloses an absorption type unit capable of switching heat source types. The device is mainly applied to the industrial waste heat recovery field. The unit comprises an absorber, an evaporator, a regenerator, a condenser, a heat exchanger, a heat recoverer, a dilute solution pump, a concentrated solution pump, a refrigerant pump, a heat source switching valve, a steam control valve and a cooling water adjusting valve, application of different types of heat sources is achieved through switching of the heat source switching valve, and the operation efficiency of a system can be improved; and through control switching of the steam control valve and the cooling water adjusting valve, stable operation of the unit after switching of different types of heat sources is achieved, the use safety of the unit is improved, the unit can preferentially use a low-grade heat source through switching of valves and control, when the low-grade heat source is insufficient, the low-grade heat source is switched into a high-grade heat source, and the use safety of the unit is improved. The energy-saving effect of the system is improved, energy waste is avoided, and long-term economic benefits and social benefits are brought to users.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchange equipment, and relates to an absorption chiller unit with switchable heat source types. It is mainly used in the field of industrial waste heat recovery. Background Technology

[0002] With energy becoming increasingly scarce, energy conservation has become a global focus. While actively developing new energy sources, there is also a growing emphasis on recovering and utilizing waste heat resources, as efficient utilization of waste heat is an effective way to address energy shortages. Many industrial sectors possess substantial waste heat resources at varying temperatures; neglecting to utilize these resources would result in waste.

[0003] Currently, waste heat resources at different temperatures require multiple units for heat recovery, resulting in high equipment investment, large equipment footprint, and poor economic efficiency. Some factories combine waste heat resources at different temperatures and then use a single unit for heat recovery, but the waste heat resources are not utilized in a tiered manner, and the effective utilization rate of high-grade heat sources is low, leading to energy waste. How to achieve the recovery and utilization of waste heat resources at different temperatures has become an important issue for energy conservation and emission reduction in the industrial sector. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings in the aforementioned background technology and provide an absorption chiller unit with switchable heat source types. This absorption chiller unit can utilize different types of heat sources by switching heat source switching valves, which can improve the operating efficiency of the system. Through the control and switching of steam control valves and cooling water regulating valves, the stable operation of the unit after switching between different types of heat sources is achieved, improving the safety of the unit's use. This absorption chiller unit can utilize different types of heat sources by switching valves and controls, and can preferentially use low-grade heat sources. When low-grade heat sources are insufficient, it can switch to high-grade heat sources, improving the energy-saving effect of the system and avoiding energy waste.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An absorption chiller unit with switchable heat source types includes an absorber, an evaporator, a regenerator, a condenser, a heat exchanger, a heat recovery unit, a dilute solution pump, a concentrated solution pump, and a refrigerant pump. The absorber and evaporator are arranged in one cylinder, and the condenser and regenerator are arranged in another cylinder. The evaporator and condenser are connected, and the condenser and absorber are connected. The absorber, dilute solution pump, heat exchanger, heat recovery unit, regenerator, concentrated solution pump, heat exchanger, and absorber are connected in sequence to form a solution circulation mechanism. The evaporator, condenser, refrigerant pump, and connecting pipelines form a refrigerant water circulation system.

[0007] The absorber and the heat exchanger are connected through a dilute solution pipeline A, the heat exchanger and the heat recovery device are connected through a dilute solution pipeline B, the heat recovery device and the regenerator are connected through a dilute solution pipeline C, the regenerator and the heat exchanger are connected through a concentrated solution pipeline A, the heat exchanger and the absorber are connected through a concentrated solution pipeline B; the evaporator is connected with a refrigerant water pipeline A, the condenser and the evaporator are connected through a refrigerant water pipeline B, and the evaporator is connected with a cold water inlet pipeline and a cold water outlet pipeline respectively; the absorber is connected with a cooling water inlet pipeline, the condenser is connected with a cooling water outlet pipeline, and the absorber and the condenser are connected through a cooling water pipeline; the regenerator is connected with a heat source connection pipeline and a heat source outlet connection pipeline A, and a high-temperature heat source inlet pipeline and a low-temperature heat source inlet pipeline are arranged in parallel on the heat source connection pipeline; a heat source outlet connection pipeline B and a heat source outlet connection pipeline D are arranged in parallel on the heat source outlet connection pipeline A; the heat source outlet connection pipeline B is connected with the heat recovery device, the heat recovery device is connected with a heat source outlet connection pipeline C; a steam control valve and a heat source switching valve A are arranged in series on the high-temperature heat source inlet pipeline, a heat source switching valve B is arranged on the low-temperature heat source inlet pipeline, a heat source switching valve C is arranged on the heat source outlet connection pipeline B, a heat source switching valve D is arranged on the heat source outlet connection pipeline D, a steam condensate flow regulating valve is arranged on the heat source outlet connection pipeline C, and a cooling water regulating valve is arranged on the cooling water outlet pipeline.

[0008] A heat source exhaust pipeline is arranged on the heat source outlet connection pipeline A, and an exhaust valve is arranged on the heat source exhaust pipeline.

[0009] A heat source drainage pipeline is arranged on the heat source outlet connection pipeline B, and a drainage valve is arranged on the heat source drainage pipeline.

[0010] The utility model has the beneficial effects compared with prior art:

[0011] 1. The unit can realize the application of different kinds of heat sources through the switching of the heat source switching valve A, the heat source switching valve B, the heat source switching valve C and the heat source switching valve D, and realize the stable operation of the unit after the switching of different kinds of heat sources through the control switching of the steam control valve and the cooling water regulating valve, thereby improving the use safety of the unit.

[0012] 2. The application of different kinds of heat sources is realized through the switching of valves and controls, the low-grade heat source can be used preferentially, the high-grade heat source is switched when the low-grade heat source is insufficient, the energy saving effect of the system is improved, the waste of energy is avoided, the problems of high equipment investment and large equipment space in the heat recovery of waste heat resources with different temperatures are solved, and long-term economic benefits and social benefits are brought to users. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further described below in combination with the drawings and embodiments:

[0014] Figure 1The utility model relates to an absorption unit structure schematic diagram of switchable heat source kind.

[0015] In the figure: 1-absorber, 2-evaporator, 3-regenerator, 4-condenser, 5-heat exchanger, 6-heat recovery unit, 7-dilute solution pump, 8-concentrated solution pump, 9-refrigerant pump, 10-cold water inlet pipeline, 11-cold water outlet pipeline, 12-cooling water inlet pipeline, 13-cooling water pipeline, 14-cooling water outlet pipeline, 15-high-temperature heat source inlet pipeline, 16-low-temperature heat source inlet pipeline, 17-heat source connecting pipeline, 18-heat source outlet connecting pipeline A, 19-heat source outlet connecting pipeline B, 20-heat source outlet connecting pipeline C, 21-heat source outlet connecting pipeline D, 22-heat source exhaust pipeline, 23-heat source drainage pipeline, 24-dilute solution pipeline A, 25-dilute solution pipeline B, 26-dilute solution pipeline C, 27-concentrated solution pipeline A, 28-concentrated solution pipeline B, 29-steam control valve, 30-cooling water regulating valve, 31-heat source switching valve A, 32-heat source switching valve B, 33-heat source switching valve C, 34-heat source switching valve D, 35-exhaust valve, 36-drainage valve, 37-steam condensate flow regulating valve, 38-refrigerant water pipeline A, 39-refrigerant water pipeline B. DETAILED DESCRIPTION

[0016] The utility model is further explained in connection with the accompanying drawings of the specification, but the utility model is not limited to the following examples.

[0017] Example 1

[0018] An absorption unit structure schematic diagram of switchable heat source kind, as Figure 1As shown, including absorber 1, evaporator 2, regenerator 3, condenser 4, heat exchanger 5, heat recovery 6, dilute solution pump 7, concentrated solution pump 8, refrigerant pump 9, wherein the absorber 1 and evaporator 2 are arranged in a cylinder, condenser 4 and regenerator 3 are arranged in a cylinder, the absorber 1 and heat exchanger 5 between the connection of dilute solution pipeline A24, heat exchanger 5 and heat recovery 6 between the connection of dilute solution pipeline B25, heat recovery 6 and regenerator 3 between the connection of dilute solution pipeline C26, regenerator 3 and heat exchanger 5 between the connection of concentrated solution pipeline A27, heat exchanger 5 and absorber 1 between the connection of concentrated solution pipeline B28; Evaporator 2 is provided with refrigerant water pipeline A38, condenser 4 and evaporator 2 between the connection of refrigerant water pipeline B39. Absorber 1, dilute solution pump 7, heat exchanger 5, heat recovery 6, regenerator 3, concentrated solution pump 8, heat exchanger 5, absorber 1 in turn connected to constitute the solution circulation mechanism, evaporator 2, condenser 4, refrigerant pump 9 and connecting pipeline constitute refrigerant water circulation, namely the dilute solution from the absorber 1 through dilute solution pump 7 in turn through heat exchanger 5, heat recovery 6 heat transfer after sending into regenerator 3 temperature concentration to form concentrated solution, concentrated solution through concentrated solution pump 8 after heat exchanger 5 heat transfer temperature decreases, through concentrated solution pipeline B28 back to the absorber 1 drop on the cooling water pipe, absorb the refrigerant vapor from the evaporator 2, form dilute solution, while the refrigerant water is dropped on the cooling water pipe in the evaporator 2, cooling into the evaporator 2 of cold water, realize refrigeration.

[0019] The evaporator 2 is connected with the cold water inlet pipeline 10 and the cold water outlet pipeline 11; the absorber 1 is connected with the cooling water inlet pipeline 12, the condenser 4 is connected with the cooling water outlet pipeline 14, and the absorber 1 and the condenser 4 are connected through the cooling water pipeline 13; the regenerator 3 is connected with the heat source connection pipeline 17 and the heat source outlet connection pipeline A 18, the high-temperature heat source inlet pipeline 15 and the low-temperature heat source inlet pipeline 16 are arranged in parallel on the heat source connection pipeline 17; the heat source outlet connection pipeline A 18 is arranged with the heat source outlet connection pipeline B 19 and the heat source outlet connection pipeline D 21 in parallel; the heat source outlet connection pipeline B 19 is connected with the heat recovery device 6, and the heat recovery device 6 is connected with the heat source outlet connection pipeline C 20; the steam control valve 29 and the heat source switching valve A 31 are arranged in series on the high-temperature heat source inlet pipeline 15, the heat source switching valve B 32 is arranged on the low-temperature heat source inlet pipeline 16, the heat source switching valve C 33 is arranged on the heat source outlet connection pipeline B 19, the heat source switching valve D 34 is arranged on the heat source outlet connection pipeline D 21, the steam condensate flow regulating valve 37 is arranged on the heat source outlet connection pipeline C 20, and the cooling water regulating valve 30 is arranged on the cooling water outlet pipeline 14. The unit can realize the application of different kinds of heat sources through the switching of the heat source switching valve A 31, the heat source switching valve B 32, the heat source switching valve C 33 and the heat source switching valve D 34, and realize the stable operation of the unit after the switching of different kinds of heat sources through the control switching of the steam control valve 29 and the cooling water regulating valve 30, that is, when the heat source is high-grade heat source such as high-pressure steam, the heat source switching valve B 32 and the heat source switching valve D 34 are closed, the heat source switching valve A 31 and the heat source switching valve C 33 are opened, the high-grade heat source enters the unit through the high-temperature heat source inlet pipeline 15, exchanges heat in the regenerator 3 and the heat recovery device 6, and then flows out of the unit through the heat source outlet connection pipeline C 20, and the flow of the high-pressure steam entering the unit is adjusted through the steam control valve 29 and the steam condensate flow regulating valve 37, so that the unit can operate stably; when the heat source is low-grade heat source such as low-pressure steam, negative-pressure steam and low-temperature hot water, the heat source switching valve B 32 and the heat source switching valve D 34 are opened, and the heat source switching valve A 31 and the heat source switching valve C 33 are closed, the low-grade heat source enters the unit through the low-temperature heat source inlet pipeline 16, exchanges heat in the regenerator 3, and then flows out of the unit through the heat source outlet connection pipeline D 21, and the load of the unit is adjusted through the cooling water regulating valve 30, so that the unit can operate stably.

[0020] The heat source outlet connection pipeline A 18 is arranged with the heat source exhaust pipeline 22, and the heat source exhaust pipeline 22 is arranged with the exhaust valve 35, so that when the heat source is low-temperature hot water, the exhaust valve 35 can be used for automatic exhaust.

[0021] The heat source outlet connection pipeline B 19 is arranged with the heat source drainage pipeline 23, and the heat source drainage pipeline 23 is arranged with the drainage valve 36, so that when the heat recovery device 6 needs to be overhauled, the drainage valve 36 can be used for drainage.

[0022] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model all belong to the range of protection required by the utility model.

Claims

1. An absorption chiller unit capable of switching the type of heat source, characterized by: The application relates to an absorption refrigeration system, which comprises an absorber (1), an evaporator (2), a regenerator (3), a condenser (4), a heat exchanger (5), a heat recovery device (6), a dilute solution pump (7), a concentrated solution pump (8), a refrigerant pump (9), wherein the absorber (1) and the evaporator (2) are arranged in a cylinder, the condenser (4) and the regenerator (3) are arranged in a cylinder, the evaporator (2) is connected with the condenser (4), the condenser (4) is connected with the absorber (1), the absorber (1) and the heat exchanger (5) are connected through a dilute solution pipeline A (24), the heat exchanger (5) and the heat recovery device (6) are connected through a dilute solution pipeline B (25), the heat recovery device (6) and the regenerator (3) are connected through a dilute solution pipeline C (26), the regenerator (3) and the heat exchanger (5) are connected through a concentrated solution pipeline A (27), and the heat exchanger (5) and the absorber (1) are connected through a concentrated solution pipeline B (28); the evaporator (2) is connected with a refrigerant water pipeline A (38), the condenser (4) and the evaporator (2) are connected through a refrigerant water pipeline B (39), and the absorber (1), the dilute solution pump (7), the heat exchanger (5), the heat recovery device (6), the regenerator (3), the concentrated solution pump (8), the heat exchanger (5) and the absorber (1) are sequentially connected to form a solution circulating mechanism, and the evaporator (2), the condenser (4), the refrigerant pump (9) and the connecting pipelines form a refrigerant water circulating system.

2. An absorption chiller unit of the switchable heat source variety as claimed in claim 1, characterized in that: The evaporator (2) is connected with a cold water inlet pipeline (10) and a cold water outlet pipeline (11); the absorber (1) is connected with a cooling water inlet pipeline (12), the condenser (4) is connected with a cooling water outlet pipeline (14), the absorber (1) and the condenser (4) are connected through a cooling water pipeline (13); the regenerator (3) is connected with a heat source connecting pipeline (17) and a heat source outlet connecting pipeline A (18), the heat source connecting pipeline (17) is provided with a high-temperature heat source inlet pipeline (15) and a low-temperature heat source inlet pipeline (16) in parallel, the heat source outlet connecting pipeline A (18) is provided with a heat source outlet connecting pipeline B (19) and a heat source outlet connecting pipeline D (21) in parallel, the heat source outlet connecting pipeline B (19) is connected with the heat recovery device (6), the heat recovery device (6) is connected with a heat source outlet connecting pipeline C (20), the high-temperature heat source inlet pipeline (15) is provided with a steam control valve (29) and a heat source switching valve A (31) in series, the low-temperature heat source inlet pipeline (16) is provided with a heat source switching valve B (32), the heat source outlet connecting pipeline B (19) is provided with a heat source switching valve C (33), the heat source outlet connecting pipeline D (21) is provided with a heat source switching valve D (34), the heat source outlet connecting pipeline C (20) is provided with a steam condensate flow regulating valve (37), and the cooling water outlet pipeline (14) is provided with a cooling water regulating valve (30).

3. An absorption chiller unit of the switchable heat source variety as claimed in claim 2, characterized in that: The heat source outlet connecting pipeline A (18) is provided with a heat source exhaust pipeline (22), and the heat source exhaust pipeline (22) is provided with an exhaust valve (35).

4. An absorption chiller unit of the switchable heat source variety as claimed in claim 2, characterized in that: The heat source outlet connecting pipeline B (19) is provided with a heat source drainage pipeline (23), and the heat source drainage pipeline (23) is provided with a drainage valve (36).

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