Cooling water waste heat recovery device of heat supply air compressor

Abstract

A cooling water waste heat recovery device of a heat supply air compressor comprises the heat supply air compressor, a heat exchanger, a middle water tank and a water storage tank, the two ends of the heat exchanger are connected with the heat supply air compressor and the middle water tank respectively, and the middle water tank comprises a cold water tank, a heating water tank and a water inlet pipe. A water inlet of the heating water tank is communicated with a hot water outlet of the heat exchanger through a first water pump, one water outlet of the heating water tank is communicated with the cold water inlet of the heat exchanger through an electromagnetic valve, and the other water outlet of the heating water tank is communicated with a water inlet of the water storage tank through a second water pump. A water outlet of the water storage tank is connected with a domestic hot water pipeline through a third water pump. According to the cooling water waste heat recovery device for the heat supply air compressor, the service life of the heat supply air compressor is prolonged through the arrangement of the middle water tank and the electromagnetic valve; by arranging a filter, the quality of hot water is improved; and by arranging the heat preservation layer, the heat preservation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a device for recovering waste heat from cooling water of a heating air compressor. Background Art

[0002] An air compressor is a device that compresses air into high-pressure gas. It is usually used in industrial production, construction sites, car repair and other fields. The air compressor generates a lot of waste heat during operation. This is because the air generates heat when it is compressed into high-pressure gas, which causes the temperature of the air compressor itself and its surrounding environment to rise. Waste heat is a waste of energy, which will lead to energy waste and increased costs. It will cause the temperature of the air compressor itself and the surrounding environment to rise, which may affect the normal operation and life of the equipment and increase the maintenance cost of the equipment.

[0003] The waste heat recovery device for cooling water of heating air compressor utilizes the heat generated by the air compressor during operation, absorbs the heat through cooling water, heats the cooling water, and then uses the heated hot water for heating or hot water. This can not only save energy and reduce energy consumption, but also improve energy utilization efficiency and reduce energy costs. At the same time, the waste heat recovery device can also reduce environmental pollution and heat emissions.

[0004] However, when the heat recovered by the waste heat recovery device for the cooling water of the heating air compressor is too much, the temperature of the heating air compressor itself will drop to a temperature that cannot meet its normal operation, thus affecting the normal operation and life of the equipment. Therefore, it is of great significance to study a new type of waste heat recovery device for the cooling water of the heating air compressor and solve the above problems to extend the service life of the air compressor. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a waste heat recovery device for cooling water of a heating air compressor. The waste heat recovery device for cooling water of a heating air compressor can adjust the temperature of water entering the heat exchanger for heat exchange as needed through the provision of an intermediate water tank and a solenoid valve, and can control the temperature of the heating air compressor itself, thereby increasing the service life of the heating air compressor; through the provision of a first filter and a second filter, the quality of water entering and exiting the water tank can be guaranteed, thereby improving the quality of domestic hot water; through the thermal insulation layer provided on the outer wall of the tank, the energy loss of hot water in the water tank is further reduced, thereby improving the thermal insulation effect.

[0006] The technical solution of the utility model is as follows:

[0007] A device for recovering waste heat from cooling water of a heating air compressor comprises a heating air compressor, a heat exchanger, an intermediate water tank and a water storage tank, wherein two ends of the heat exchanger are respectively connected to the heating air compressor and the intermediate water tank, the intermediate water tank comprises a cold water tank, a heating water tank and a water inlet pipe, the water inlet pipe is located at the upper part of the cold water tank, the water outlet of the cold water tank is connected to the cold water inlet of the heat exchanger through a solenoid valve, the water inlet of the heating water tank is connected to the hot water outlet of the heat exchanger through a first water pump, one water outlet of the heating water tank is connected to the cold water inlet of the heat exchanger through a solenoid valve, the other water outlet of the heating water tank is connected to the water inlet of the water storage tank through a second water pump, the water outlet of the water storage tank is connected to a domestic hot water pipeline through a third water pump, and an upper liquid level sensor, a lower liquid level sensor and a temperature sensor are sequentially arranged in the water storage tank from top to bottom.

[0008] In order to improve the quality of hot water entering the water tank, a first filter is provided at the water inlet of the water tank.

[0009] In order to improve the quality of hot water flowing out of the water tank, a second filter is provided at the water outlet of the water tank.

[0010] In order to reduce the energy loss of hot water in the water storage tank and improve the thermal insulation effect, the water storage tank includes a tank body and a thermal insulation layer, and the thermal insulation layer is arranged on the outer wall of the tank body.

[0011] In order to ensure the safety and sanitation of the hot water in the box, the box is made of stainless steel.

[0012] In order to improve the thermal insulation effect of the thermal insulation layer, the thermal insulation layer is a 50mm thick polyester foam thermal insulation layer.

[0013] A second stop valve is arranged between the water outlet of the water storage tank and the domestic hot water pipeline.

[0014] The water storage tank is also provided with a drain pipe.

[0015] The outlet of the drain pipe is provided with a first stop valve.

[0016] The first stop valve is a ball valve.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model discloses a heat recovery device for cooling water of a heating air compressor. By setting an intermediate water tank and a solenoid valve, the temperature of water entering the heat exchanger for heat exchange can be adjusted as needed, and the temperature of the heating air compressor itself can be controlled, thereby increasing the service life of the heating air compressor.

[0019] 2. The utility model discloses a heat supply air compressor cooling water waste heat recovery device, which can ensure the quality of water entering and leaving the water storage tank by providing a first filter and a second filter, thereby improving the quality of domestic hot water.

[0020] 3. The utility model discloses a heat supply air compressor cooling water waste heat recovery device, which reduces the energy loss of hot water in the water storage tank and improves the heat preservation effect by setting a heat preservation layer on the outer wall of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0022] In the attached picture:

[0023] Figure 1 The present invention is a schematic structural diagram of a device for recovering waste heat from cooling water of a heating air compressor according to an embodiment of the present invention.

[0024] The components represented by the reference numerals in the figure are:

[0025] The utility model: 1. a heating air compressor, 2. a heat exchanger, 3. a first water pump, 4. a solenoid valve, 5. an intermediate water tank, 5a. a cold water tank, 5b. a heating water tank, 5c. a water inlet pipe, 6. a second water pump, 7. a first filter, 8. a first stop valve, 9. a drain pipe, 10. an upper liquid level sensor, 11. a water storage tank, 11a. a box body, 11b. an insulation layer, 12. a lower liquid level sensor, 13. a temperature sensor, 14. a second filter, 15. a third water pump, 16. a second stop valve. DETAILED DESCRIPTION

[0026] like Figure 1As shown, a heat supply air compressor cooling water waste heat recovery device comprises a heat supply air compressor 1, a heat exchanger 2, an intermediate water tank 5 and a water storage tank 11, wherein the two ends of the heat exchanger 2 are respectively connected to the heat supply air compressor 1 and the intermediate water tank 5, wherein the intermediate water tank 5 comprises a cold water tank 5a, a heating water tank 5b and a water inlet pipe 5c, wherein the water inlet pipe 5c is located at the upper part of the cold water tank 5a, wherein the water outlet of the cold water tank 5a is connected to the cold water inlet of the heat exchanger 2 through a solenoid valve 4, wherein the water inlet of the heating water tank 5b is connected to the hot water outlet of the heat exchanger 2 through a first water pump 3, wherein one water outlet of the heating water tank 5b is connected to the cold water inlet of the heat exchanger 2 through a solenoid valve 4, wherein the other water outlet of the heating water tank 5b is connected to the water inlet of the water storage tank 11 through a second water pump 6, The water outlet of the water storage tank 11 is connected to the domestic hot water pipeline through the third water pump 15. The water storage tank 11 is provided with an upper liquid level sensor 10, a lower liquid level sensor 12 and a temperature sensor 13 from top to bottom. Preferably, the water storage tank 11 comprises a box body 11a and a thermal insulation layer 11b, and the thermal insulation layer 11b is arranged on the outer wall of the box body 11a; adding a thermal insulation layer to the outer wall of the box body can effectively reduce the heat conduction between the outer wall of the box body and the external environment, reduce energy loss, and reduce energy consumption, thereby achieving the effect of energy saving and emission reduction; by adding a thermal insulation layer, the thermal insulation performance of the outer wall of the box body can be effectively improved, the influence of temperature changes on the internal environment of the box body can be reduced, and the temperature and humidity conditions inside the box body can be kept stable. By adding a thermal insulation layer, the box body can be effectively reduced. The thermal expansion and contraction of the outer wall of the box body affects the box structure, reduces the thermal stress of the outer wall of the box body, and extends the service life of the box body; preferably, the box body 11a is made of stainless steel; the stainless steel storage box body has good corrosion resistance and can resist corrosive substances such as oxides and chlorides in the water, ensuring the long-term use of the box body. The stainless steel material is non-toxic and harmless, will not release harmful substances, meets sanitary standards, and ensures the safety and hygiene of the water quality in the box body. The stainless steel material has high high temperature resistance and can withstand the storage of high temperature water. The service life of the box body will not be affected by temperature changes. The surface of stainless steel is smooth and flat, not easy to accumulate dirt, easy to clean and maintain, keeping the inside of the box clean and extending the service life; preferably, the insulation layer 11b is 50mm Thick polyester foam insulation layer; polyester foam has a low thermal conductivity, can effectively isolate the conduction of external heat, maintain the temperature of the box body stable, reduce energy consumption, is corrosion-resistant, pressure-resistant and wear-resistant, has a long service life, is not easily affected by the external environment, and polyester foam is non-toxic and harmless, does not contain chemicals harmful to the human body, meets environmental protection requirements, and is harmless to the human body and the environment; the heating air compressor cooling water waste heat recovery device can adjust the temperature of the water entering the heat exchanger for heat exchange as needed through the intermediate water tank and solenoid valve, can control the temperature of the heating air compressor itself, thereby increasing the service life of the heating air compressor, and through the insulation layer arranged on the outer wall of the box body, the energy loss of hot water in the water storage tank is reduced, thereby improving the insulation effect.

[0027] like Figure 1 As shown, a first filter 7 is provided at the water inlet of the water storage tank 11, and a second filter 14 is provided at the water outlet of the water storage tank 11. The first filter and the second filter can effectively filter out impurities, sand, soil and other impurities in the water inlet and the water outlet, ensure the cleanliness of water entering the water storage tank, improve the purity of the water quality, and at the same time prevent large particles of impurities from entering and exiting the water storage tank, avoid impurities clogging pipes or damaging equipment, and extend the service life of the equipment. Moreover, the first filter and the second filter can be disassembled and cleaned, which is convenient for cleaning and maintenance, and the normal operation effect of the first filter and the second filter is maintained to ensure the cleanliness of the water entering and exiting the water storage tank. By setting the first filter and the second filter, the quality of water entering and exiting the water storage tank can be guaranteed, and the quality of domestic hot water is improved.

[0028] like Figure 1 As shown, a second stop valve 16 is arranged between the water outlet of the water storage tank 11 and the domestic hot water pipe. The second stop valve is arranged at the water outlet of the water storage tank to quickly cut off the hot water supply when necessary, avoiding safety hazards caused by water leakage in the hot water pipe or other unexpected situations, and facilitating the inspection, maintenance and replacement of the hot water pipe without affecting the normal operation of the entire hot water system. The stop valve can cut off the hot water supply in time when water leakage or other problems occur in the hot water pipe, avoiding waste and damage caused by overflow of hot water.

[0029] like Figure 1 As shown, the water tank 11 is also provided with a drain pipe 9, through which the inside of the water tank can be cleaned regularly to remove scale, impurities and bacteria, keep the water clean and sanitary, and improve the quality of hot water; preferably, the outlet of the drain pipe 9 is provided with a first stop valve 8; the first stop valve can be opened when drainage is required and closed when drainage is not required, effectively preventing water leakage in the water tank and avoiding waste of water resources and water loss. The drainage volume and drainage speed can also be controlled as needed to avoid excessive drainage at one time, leading to water pollution or other problems; preferably, the first stop valve 8 is a ball valve, the main part of the ball valve is a sphere, which has a simple structure, good sealing, long service life, good wear resistance, high temperature resistance and corrosion resistance, and the ball valve is light and flexible to switch, and only needs to be rotated 90 degrees to achieve quick switching. The operation is simple and convenient, and it is suitable for various operating environments.

[0030] like Figure 1As shown, when in use, when the temperature of the cooling water entering the heat exchanger 2 from the heating air compressor 1 is low, the control system controls the solenoid valve 4 to operate, and only allows the water in the heating water tank 5b to enter the heat exchanger 2 to meet the operating temperature of the heating air compressor 1 itself; when the temperature of the cooling water entering the heat exchanger 2 from the heating air compressor 1 is very high, the control system controls the solenoid valve 4 to operate, and only allows the water in the cold water tank 5a to enter the heat exchanger 2; when the temperature of the cooling water entering the heat exchanger 2 from the heating air compressor 1 is moderate, the control system can control the solenoid valve 4 to operate back and forth, and intermittently allow the water in the cold water tank 5a and the heating water tank 5b to enter the heat exchanger 2, thereby controlling the temperature of the heating air compressor 1 itself and improving the service life of the heating air compressor 1; the heating air compressor cooling water waste heat recovery device can adjust the temperature of the water entering the heat exchanger for heat exchange as needed through the intermediate water tank and the solenoid valve, and can control the temperature of the heating air compressor itself, thereby improving the service life of the heating air compressor.

Claims

1. A heating air compressor cooling water waste heat recovery device, characterized in that: The invention comprises a heating air compressor (1), a heat exchanger (2), an intermediate water tank (5) and a water storage tank (11), wherein the two ends of the heat exchanger (2) are respectively connected to the heating air compressor (1) and the intermediate water tank (5), wherein the intermediate water tank (5) comprises a cold water tank (5a), a heating water tank (5b) and a water inlet pipe (5c), wherein the water inlet pipe (5c) is located at the upper part of the cold water tank (5a), and the water outlet of the cold water tank (5a) is connected to the cold water inlet of the heat exchanger (2) through a solenoid valve (4), and the water inlet of the heating water tank (5b) is connected to the cold water inlet of the heat exchanger (2) through a first water pump. (3) is connected to the hot water outlet of the heat exchanger (2), one water outlet of the heating water tank (5b) is connected to the cold water inlet of the heat exchanger (2) through the solenoid valve (4), the other water outlet of the heating water tank (5b) is connected to the water inlet of the water storage tank (11) through the second water pump (6), the water outlet of the water storage tank (11) is connected to the domestic hot water pipeline through the third water pump (15), and an upper liquid level sensor (10), a lower liquid level sensor (12) and a temperature sensor (13) are arranged in sequence from top to bottom in the water storage tank (11).

2. A heating air compressor cooling water waste heat recovery device according to claim 1, characterized in that: A first filter (7) is provided at the water inlet of the water storage tank (11).

3. The device for recovering waste heat from cooling water of a heating air compressor according to claim 1, characterized in that: A second filter (14) is provided at the water outlet of the water storage tank (11).

4. The device for recovering waste heat from cooling water of a heating air compressor according to claim 1, characterized in that: The water storage tank (11) comprises a tank body (11a) and a heat-insulating layer (11b), wherein the heat-insulating layer (11b) is arranged on the outer wall of the tank body (11a).

5. A heating air compressor cooling water waste heat recovery device according to claim 4, characterized in that: The box body (11a) is made of stainless steel.

6. A heating air compressor cooling water waste heat recovery device according to claim 4, characterized in that: The thermal insulation layer (11b) is a 50 mm thick polyester foam thermal insulation layer.

7. The device for recovering waste heat from cooling water of a heating air compressor according to claim 1, characterized in that: A second stop valve (16) is provided between the water outlet of the water storage tank (11) and the domestic hot water pipeline.

8. The device for recovering waste heat from cooling water of a heating air compressor according to claim 1, characterized in that: The water storage tank (11) is also provided with a drainage pipe (9).

9. A heating air compressor cooling water waste heat recovery device according to claim 8, characterized in that: The outlet of the drainage pipe (9) is provided with a first stop valve (8).

10. A heating air compressor cooling water waste heat recovery device according to claim 9, characterized in that: The first stop valve (8) is a ball valve.

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