Air compression heat recovery system

Abstract

The utility model discloses an air compression heat recovery system. The air compression heat recovery system comprises a cold source and an air compressor cooler, the air compressor cooler is connected with the cold source through a first pipeline and a second pipeline, and the air compressor cooler and the cold source form a circulation loop through the first pipeline and the second pipeline; the first pipeline is connected with a cooling water pump, and the cooling water pump is used for pressurizing and conveying cooling water supplied by the cold source to the air compressor cooler; the second pipeline is connected with a high-temperature water source heat pump, the high-temperature water source heat pump comprises an evaporator and a condenser, the evaporator is connected in the second pipeline, the condenser is used for exchanging heat with the evaporator, and the condenser is used for exchanging heat with high-temperature water terminal equipment. According to the air compression heat recovery system, compression waste heat of the air compressor can be effectively recovered, a high-grade heat source can be prepared and used by the high-temperature water terminal equipment, energy waste and loss caused by the fact that the grade of recovered heat energy is low and the recovered heat energy is not matched with the requirement of the high-temperature water terminal equipment are avoided, and therefore the energy utilization efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of energy technology, and in particular to an air compression heat recovery system. Background Art

[0002] With the development of economy, the progress of society, and the approaching of the time nodes of carbon peak and carbon neutrality, energy conservation and recycling have become a social consensus. In large-scale semiconductor or display panel factories, the compressed air system (referred to as the air compression system) generates a lot of waste heat during operation. At the same time, many air conditioning systems, pure water systems, wastewater systems, etc. require a lot of heat sources, which provides an opportunity to recycle the waste heat generated by the air compression system.

[0003] Since the waste heat recovery of the air compressor system is only carried out through the primary heat exchanger, the temperature of the recovered hot water is only about 40°C. The low quality of the recovered heat energy makes it only available for general air conditioning systems, limiting its scope of use. However, the heat demand at the end of the hot water system such as pure water system resin regeneration, hot pure water, and wastewater ammonia nitrogen recovery is a high-quality heat source of 60 to 80°C. There is a mismatch between the heat energy grade recovered by the air compressor system and the heat energy grade required at the end of the hot water system, so that this type of high-quality heat source can usually only be provided by gas boilers or steam heat exchange, and the waste heat recovered by the air compressor system cannot be used, which causes a lot of energy waste and loss. Utility Model Content

[0004] The embodiment of the present application provides an air compression heat recovery system to improve the quality of recovered heat energy of the air compression system, thereby improving energy utilization efficiency.

[0005] The embodiment of the present application proposes an air compressor heat recovery system, including a cold source and an air compressor cooler, wherein the air compressor cooler is connected to the cold source through a first pipeline and a second pipeline respectively, and the air compressor cooler and the cold source form a circulation loop through the first pipeline and the second pipeline. The first pipeline is connected to a cooling water pump, and the cooling water pump is used to pressurize and transport the cooling water supplied by the cold source to the air compressor cooler. The second pipeline is connected to a high-temperature water source heat pump, and the high-temperature water source heat pump includes an evaporator and a condenser. The evaporator is connected to the second pipeline, and the condenser is used to exchange heat with the evaporator, and the condenser is used to exchange heat with a high-temperature water terminal device.

[0006] As a scheme of an embodiment of the present application, the air compression heat recovery system also includes a third pipeline, the first end of the third pipeline is connected to the first pipeline, and the first end of the third pipeline is connected between the cold source and the cooling water pump, the second end of the third pipeline is connected to the second pipeline, and the second end of the third pipeline is connected between the cold source and the high-temperature water source heat pump; the third pipeline is connected to a flow regulating valve.

[0007] As a solution of an embodiment of the present application, the first end of the third pipeline is connected to the water inlet of the cooling water pump.

[0008] As a solution of an embodiment of the present application, the air compression heat recovery system also includes a temperature sensor, which is arranged in the first pipeline, and the temperature sensor is located between the first end of the third pipeline and the cooling water pump.

[0009] As a solution of an embodiment of the present application, the first pipeline includes a first branch and a second branch, the cooling water pump is connected to the cold source through the first branch, and the cooling water pump is connected to the air compressor cooler through the second branch.

[0010] As a solution of an embodiment of the present application, the second pipeline includes a third branch and a fourth branch, the high-temperature water source heat pump is connected to the air compressor cooler through the third branch, and the high-temperature water source heat pump is connected to the cold source through the fourth branch.

[0011] As a scheme of an embodiment of the present application, the high-temperature water source heat pump is connected to the high-temperature water terminal equipment through the fourth pipeline and the fifth pipeline, and the high-temperature water source heat pump and the high-temperature water terminal equipment form a circulation loop through the fourth pipeline and the fifth pipeline.

[0012] As a solution of an embodiment of the present application, the condenser is connected to the fourth pipeline and the fifth pipeline respectively.

[0013] As a solution of an embodiment of the present application, the fourth pipeline is connected to a high-temperature water circulation pump.

[0014] As a solution of an embodiment of the present application, the fifth pipeline is connected to a high-temperature water circulation pump.

[0015] The air-compressed heat recovery system provided in the embodiment of the present application realizes a system architecture of coupled operation of a cold source, a high-temperature water source heat pump and an air-compressed heat recovery condition through the combination of a high-temperature water source heat pump and an air compressor. This can effectively recover the waste heat compressed by the air compressor and produce a high-grade heat source, thereby improving the energy grade of waste heat recovered by the air-compressed heat recovery system and expanding the scope of use of the recovered waste heat. This can solve the problem of low-grade heat source of waste heat recovered by air-compressed heat recovery in semiconductor or display panel factories and the mismatch with the high-temperature hot water demand of high-temperature water terminal equipment, and can avoid energy waste and loss caused by the mismatch between the recovered heat energy grade and the demand, thereby improving the energy utilization efficiency of semiconductor or display panel factories. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of the air compression heat recovery system provided in the embodiment of the present application;

[0018] Figure 2 A possible specific implementation schematic diagram of the air compression heat recovery system provided in the embodiment of the present application;

[0019] Figure 3 A schematic diagram of another possible specific implementation of the air compression heat recovery system provided in an embodiment of the present application.

[0020] Reference numerals:

[0021] 1-cold source; 2-air compressor cooler; 3-cooling water pump;

[0022] 4-high temperature water source heat pump; 5-high temperature water terminal equipment; 6-third pipeline;

[0023] 7-flow regulating valve; 8-temperature sensor; 9-fourth pipeline;

[0024] 10-fifth pipeline; 11-first branch; 12-second branch;

[0025] 13-the third branch; 14-the fourth branch; 15-the high-temperature water circulation pump. DETAILED DESCRIPTION

[0026] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0027] In the description of the present application, it should be noted that, unless otherwise specified, the terms "first" and "second" etc. are used for descriptive purposes only and shall not be understood as indicating or implying relative importance; "plurality" means two or more; the terms "inside", "outside", "top", "bottom" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore shall not be understood as limiting the present application.

[0028] For ease of understanding, the application scenario of the air compression heat recovery system involved in this application is first explained. The air compression heat recovery system provided in the embodiment of this application can be adapted to the compressed air system (referred to as the air compression system) in a large semiconductor or display panel factory, and can be used to absorb a large amount of waste heat generated during the operation of the air compression system.

[0029] In the related art, the waste heat recovery of the air compression system is only carried out through the primary heat exchanger, and the temperature of the recovered hot water is only about 40°C. The low grade of the recovered heat energy makes it only able to supply general air conditioning systems, and the scope of use is relatively narrow. However, in large semiconductor or display panel factories, the heat demand at the end of the hot water system (such as pure water system resin regeneration, hot pure water, wastewater ammonia nitrogen recovery, etc.) is a high-grade heat source of 60 to 80°C. There is a mismatch between the recovered heat energy grade of the air compression system and the heat energy grade required at the end of the hot water system, so that this type of high-grade heat source can usually only be provided by gas boilers or steam heat exchange, and the waste heat recovered by the air compression system cannot be used, which causes a lot of energy waste and loss.

[0030] Based on this, an embodiment of the present application provides an air compression heat recovery system to improve the quality of recovered heat energy in the air compression system, thereby improving energy utilization efficiency.

[0031] See also Figure 1 , an embodiment of the present application provides an air-compressed heat recovery system, including a cold source 1 and an air compressor cooler 2, the air compressor cooler 2 is connected to the cold source 1 through a first pipeline and a second pipeline respectively, and the air compressor cooler 2 and the cold source 1 form a circulation loop through the first pipeline and the second pipeline. Among them, the cold source 1 can be a cooling tower, a chiller, etc. The first pipeline is connected to a cooling water pump 3, and the cooling water pump 3 can pressurize and transport the cooling water supplied by the cold source 1 to the air compressor cooler 2. The second pipeline is connected to a high-temperature water source heat pump 4, and the high-temperature water source heat pump 4 includes an evaporator and a condenser. The evaporator is connected to the second pipeline, and the condenser can exchange heat with the evaporator, and the condenser can exchange heat with a high-temperature water terminal device 5 (such as pure water resin regeneration equipment, hot pure water equipment, wastewater ammonia nitrogen recovery equipment, etc.).

[0032] In this embodiment, through the above-mentioned settings, a low-temperature water source side and a high-temperature water supply side are formed based on the high-temperature water source heat pump 4. The low-temperature water source side of the high-temperature water source heat pump 4 includes a cold source 1, an air compressor cooler 2, a cooling water pump 3 and a high-temperature water source heat pump 4. For example, the cooling water at about 32°C supplied by the cold source 1 is transported to the air compressor cooler 2 through the cooling water pump 3 and used as air compressor cooling water. After heat exchange, a large amount of waste heat generated during the operation of the air compressor is taken out, and the water temperature rises to about 40°C. The high-temperature water carrying waste heat enters the evaporator of the high-temperature water source heat pump 4, and heat is extracted through the high-temperature water source heat pump 4. The water temperature drops to about 32°C and flows back to the cold source 1, completing a cycle of the low-temperature water source side of the high-temperature water source heat pump 4. The high-temperature water supply side of the high-temperature water source heat pump 4 includes a high-temperature water source heat pump 4 and a high-temperature water terminal device 5. For example, after the high-temperature water source heat pump 4 extracts the heat of hot water containing waste heat from the air compressor, the condenser of the high-temperature water source heat pump 4 delivers high-temperature hot water at about 60 to 80°C, which is supplied to the high-temperature water terminal device 5 that needs high-temperature hot water. After heat exchange and consumption, the water temperature drops to about 40 to 60°C, and then is delivered back to the high-temperature water source heat pump 4, completing a cycle of the high-temperature water supply side of the high-temperature water source heat pump 4.

[0033] The air-compressed heat recovery system provided in the embodiment of the present application realizes a system architecture of coupled operation of the cold source 1, the high-temperature water source heat pump 4 and the air-compressed heat recovery condition through the combination of the high-temperature water source heat pump 4 and the air compressor. It can effectively recover the waste heat compressed by the air compressor and produce a high-grade heat source. It can improve the energy grade of the waste heat recovered by the air-compressed heat recovery system and expand the scope of use of the recovered waste heat for use by the high-temperature water terminal equipment 5. It can solve the problem of low heat source grade of waste heat recovered from air-compressed heat in semiconductor or display panel factories and the mismatch with the high-temperature hot water demand of the high-temperature water terminal equipment 5. It can avoid energy waste and loss caused by the mismatch between the recovered heat energy grade and the demand of the high-temperature water terminal equipment 5, thereby improving the energy utilization efficiency of the semiconductor or display panel factory.

[0034] In a specific implementation, the first pipeline includes a first branch 11 and a second branch 12, the cooling water pump 3 is connected to the cold source 1 through the first branch 11, and the cooling water pump 3 is connected to the air compressor cooler 2 through the second branch 12. One end of the first branch 11 is connected to the cold source 1, the other end of the first branch 11 is connected to the water inlet of the cooling water pump 3, one end of the second branch 12 is connected to the water outlet of the cooling water pump 3, and the other end of the second branch 12 is connected to the air compressor cooler 2. Similarly, the second pipeline includes a third branch 13 and a fourth branch 14, the high-temperature water source heat pump 4 is connected to the air compressor cooler 2 through the third branch 13, and the high-temperature water source heat pump 4 is connected to the cold source 1 through the fourth branch 14. One end of the third branch 13 is connected to the air compressor cooler 2, and the other end of the third branch 13 is connected to the high-temperature water source heat pump 4. One end of the fourth branch 14 is connected to the high-temperature water source heat pump 4, and the other end of the fourth branch 14 is connected to the cold source 1. The cooling water supplied by the cold source 1 can flow through the first branch 11, the cooling water pump 3, the second branch 12, the air compressor cooler 2, the third branch 13, the high-temperature water source heat pump 4, the fourth branch 14 in sequence, and then flow back to the cold source 1, completing a cycle on the low-temperature water source side of the high-temperature water source heat pump 4.

[0035] As a possible implementation, the air compression heat recovery system further includes a third pipeline 6, the first end of the third pipeline 6 is connected to the first pipeline, and the first end of the third pipeline 6 is connected between the cold source 1 and the cooling water pump 3, the second end of the third pipeline 6 is connected to the second pipeline, and the second end of the third pipeline 6 is connected between the cold source 1 and the high-temperature water source heat pump 4, and the third pipeline 6 is connected with a flow regulating valve 7. The high-temperature water carrying waste heat enters the evaporator of the high-temperature water source heat pump 4, and the heat is extracted by the high-temperature water source heat pump 4, and the water temperature drops to about 32°C. The setting of the third pipeline 6 can make part of the water flow return to the water inlet of the cooling water pump 3, and the flow regulating valve 7 can adjust the flow of the water flow returning to the water inlet of the cooling water pump 3, so that the temperature of the water flow entering the cooling water pump 3 can be adjusted.

[0036] In a specific implementation, the air compressor heat recovery system further includes a temperature sensor 8, which is disposed in the first pipeline, and the temperature sensor 8 is located between the first end of the third pipeline 6 and the cooling water pump 3. According to the temperature signal of the temperature sensor 8, the flow control valve 7 can control the flow distribution of the return to the cold source 1 and the water inlet of the cooling water pump 3. When the return water temperature is higher than the set temperature (such as about 32°C), the valve opening of the flow control valve 7 is reduced, and vice versa, the valve opening of the flow control valve 7 is increased, thereby ensuring the stability of the cooling water supply to the air compressor cooler 2 when the operating conditions of the high-temperature water source heat pump 4 unit change.

[0037] In specific implementation, in addition to the setting method in which the first end of the third pipeline 6 is connected between the cold source 1 and the cooling water pump 3, the first end of the third pipeline 6 can also be connected to the water inlet of the cooling water pump 3. In this case, the temperature sensor 8 is arranged at the water inlet of the cooling water pump 3.

[0038] In a possible embodiment, Figure 2 As shown, the high-temperature water source heat pump 4 is connected to the high-temperature water terminal device 5 through the fourth pipeline 9 and the fifth pipeline 10, and the high-temperature water source heat pump 4 and the high-temperature water terminal device 5 form a circulation loop through the fourth pipeline 9 and the fifth pipeline 10. The high-temperature hot water delivered by the high-temperature water source heat pump 4 flows through the fourth pipeline 9, the high-temperature water terminal device 5, and the fifth pipeline 10 in sequence, and then flows back to the high-temperature water source heat pump 4, completing a cycle on the high-temperature water supply side of the high-temperature water source heat pump 4.

[0039] In specific implementation, the condenser of the high-temperature water source heat pump 4 is connected to the fourth pipeline 9 and the fifth pipeline 10 respectively. The fourth pipeline 9 is connected to a high-temperature water circulation pump 15, or Figure 3 As shown, the fifth pipeline 10 is connected to a high-temperature water circulation pump 15. The provision of the high-temperature water circulation pump 15 can improve the water circulation efficiency, thereby improving the heat exchange efficiency with the high-temperature water terminal device 5.

[0040] Those skilled in the art should understand that the above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An air compression heat recovery system, characterized in that: It includes a cold source and an air compressor cooler, wherein the air compressor cooler is connected to the cold source through a first pipeline and a second pipeline respectively, and the air compressor cooler and the cold source form a circulation loop through the first pipeline and the second pipeline; The first pipeline is connected to a cooling water pump, and the cooling water pump is used to pressurize and transport the cooling water supplied by the cold source to the air compressor cooler; The second pipeline is connected to a high-temperature water source heat pump, which includes an evaporator and a condenser. The evaporator is connected to the second pipeline, the condenser is used to exchange heat with the evaporator, and the condenser is used to exchange heat with a high-temperature water terminal device.

2. The compressed air heat recovery system according to claim 1, characterized in that: It also includes a third pipeline, wherein a first end of the third pipeline is connected to the first pipeline, and the first end of the third pipeline is connected between the cold source and the cooling water pump, and a second end of the third pipeline is connected to the second pipeline, and the second end of the third pipeline is connected between the cold source and the high-temperature water source heat pump; The third pipeline is connected with a flow regulating valve.

3. The compressed air heat recovery system according to claim 2, characterized in that: The first end of the third pipeline is connected to the water inlet of the cooling water pump.

4. The compressed air heat recovery system according to claim 2, characterized in that: It also includes a temperature sensor, which is arranged in the first pipeline and located between the first end of the third pipeline and the cooling water pump.

5. The compressed air heat recovery system according to claim 1, characterized in that: The first pipeline includes a first branch and a second branch. The cooling water pump is connected to the cold source through the first branch, and the cooling water pump is connected to the air compressor cooler through the second branch.

6. The compressed air heat recovery system according to claim 1, characterized in that: The second pipeline includes a third branch and a fourth branch. The high-temperature water source heat pump is connected to the air compressor cooler through the third branch, and the high-temperature water source heat pump is connected to the cold source through the fourth branch.

7. The compressed air heat recovery system according to claim 1, characterized in that: The high-temperature water source heat pump is connected to the high-temperature water terminal equipment through the fourth pipeline and the fifth pipeline, and the high-temperature water source heat pump and the high-temperature water terminal equipment form a circulation loop through the fourth pipeline and the fifth pipeline.

8. The compressed air heat recovery system according to claim 7, characterized in that: The condenser is connected to the fourth pipeline and the fifth pipeline respectively.

9. The compressed air heat recovery system according to claim 7 or 8, characterized in that: The fourth pipeline is connected to a high-temperature water circulation pump.

10. The compressed air heat recovery system according to claim 7 or 8, characterized in that: The fifth pipeline is connected to a high-temperature water circulation pump.

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