Compressed air heat recovery device capable of recycling heat

Abstract

The utility model relates to a compressed air heat recovery device capable of reusing heat, which comprises a water-cooling heat exchanger, a first heat exchanger, a second heat exchanger, a heat exchanger, a heat exchanger and a heat recovery device, and the water-cooling heat exchanger is provided with an air inlet, an air outlet, a first water inlet and a first water outlet; the water storage tank is located above the water-cooling heat exchanger, and a second water inlet, a second water outlet, a third water inlet, a third water outlet, an opening and a sewage draining exit are formed in the water storage tank; two ends of the first connecting pipe are respectively connected with the first water inlet and the second water outlet; two ends of the second connecting pipe are respectively connected with the first water outlet and the second water inlet; by means of the characteristic that water is different in density at different temperatures, cold water in the water storage tank can continuously enter the water cooling heat exchanger to conduct water cooling on compressed air, and meanwhile hot water absorbing heat in the water cooling heat exchanger can continuously flow into the water storage tank to heat the cold water; in this way, heat in compressed air exhausted by the air compressor can be recycled, and practicability is high.

Description

Technical Field

[0001] The present application relates to the technical field of heat recovery, and in particular to a compressed air heat recovery device for heat recycling. Background Art

[0002] An air compressor is a machine that compresses air into high-pressure gas. Its working principle is to use a compressor to compress the air into a gas tank, then transport it to the required equipment through a pipeline and release the gas.

[0003] In related technologies, when air is compressed, it is forced to become dense due to external forces, and molecular activity is enhanced, which will cause the temperature of the air to rise. This phenomenon is called adiabatic compression. According to thermodynamic theory, adiabatic compression is more likely to increase the temperature of the gas than isothermal compression. Therefore, during the air compression process, the compressor will generate a large amount of heat. Since the heat generated by the air during compression is constantly accumulated, the temperature of the gas will gradually increase over time.

[0004] In actual use, in order to avoid overheated gas from the air compressor causing machine failure or manufacturing process problems, a cooler is generally installed at the outlet of the air compressor to discharge heat into the air through water cooling or air cooling, thereby cooling the gas to a suitable temperature. However, directly discharging excess heat into the air will not only cause heat waste, but also cause thermal pollution, which is very environmentally unfriendly.

[0005] In view of the above problems, a compressed air heat recovery device for heat recycling is now designed. Utility Model Content

[0006] The embodiment of the present application provides a compressed air heat recovery device for heat recycling to solve the problem in the related art that the heat in the compressed gas is directly discharged into the air for cooling by water cooling or air cooling, which not only causes heat waste, but also causes thermal pollution, which is very environmentally unfriendly.

[0007] In a first aspect, a compressed air heat recovery device for heat recycling is provided, comprising:

[0008] A water-cooled heat exchanger, wherein the water-cooled heat exchanger is provided with an air inlet, an air outlet, a first water inlet and a first water outlet, wherein the first water inlet is located below the first water outlet;

[0009] A water storage tank, which is located above the water-cooled heat exchanger, and is provided with a second water inlet, a second water outlet, a third water inlet, a third water outlet, an opening and a sewage outlet, wherein the opening is located at the top of the water storage tank, and the sewage outlet is located at the bottom of the water storage tank;

[0010] A first connecting pipe, two ends of which are respectively connected to the first water inlet and the second water outlet;

[0011] A second connecting pipe, two ends of which are respectively connected to the first water outlet and the second water inlet;

[0012] The first water outlet, the second water outlet, the third water inlet, the third water outlet and the sewage outlet are all provided with valves.

[0013] In some embodiments, the second water inlet is located at the lower end of one side of the water tank, the second water outlet is located at the lower end of the other side of the water tank, and the second water inlet and the second water outlet are located in the same horizontal plane.

[0014] In some embodiments, a heat-insulating layer is provided in the water storage tank.

[0015] In some embodiments, the second connecting pipe is covered with a sponge insulation cover.

[0016] In some embodiments, a shielding cover is provided on the top of the water storage tank.

[0017] The embodiment of the present application provides a compressed air heat recovery device for heat recycling. The present application utilizes the different densities of water at different temperatures, which not only allows the cold water in the water tank to continuously enter the water-cooled heat exchanger to water-cool the compressed air in the water-cooled heat exchanger, but also the hot water that has absorbed heat in the water-cooled heat exchanger will continuously flow into the water tank to heat the water in the water tank. In this way, the heat in the compressed air can be recovered into the water tank in the form of hot water, so that the hot water can be supplied to the production needs of the factory and the daily life of the staff. In this way, the heat in the compressed air can be recovered and utilized, avoiding the waste and thermal pollution caused by the direct discharge of the compressed air into the air. The device does not need to install a driving source such as a water pump, so that the water can circulate in the water tank and the water-cooled heat exchanger, which can further reduce the production cost of the factory and make the device more energy-saving, environmentally friendly and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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.

[0019] Figure 1 A schematic diagram of the structure provided for an embodiment of the present application.

[0020] In the figure: 1. water-cooled heat exchanger; 11. air inlet; 12. air outlet; 13. first water inlet; 14. first water outlet; 2. water storage tank; 21. second water inlet; 22. second water outlet; 23. third water inlet; 24. third water outlet; 25. opening; 26. drain outlet; 27. shielding cover; 3. first connecting pipe; 4. second connecting pipe; 5. valve. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0022] The embodiment of the present application provides a compressed air heat recovery device for heat reuse, which can solve the problem in the related art that the heat in the compressed gas is directly discharged into the air for cooling by water cooling or air cooling, which not only causes heat waste, but also causes thermal pollution, which is very environmentally unfriendly.

[0023] See also Figure 1 A compressed air heat recovery device for heat reuse, comprising: a water-cooled heat exchanger 1, a water storage tank 2, a first connecting pipe 3 and a second connecting pipe 4, wherein the water-cooled heat exchanger 1 is provided with an air inlet 11, an air outlet 12, a first water inlet 13 and a first water outlet 14, wherein the first water inlet 13 is located below the first water outlet 14;

[0024] The water storage tank 2 is located above the water-cooled heat exchanger 1, and is provided with a second water inlet 21, a second water outlet 22, a third water inlet 23, a third water outlet 24, an opening 25 and a sewage outlet 26. The opening 25 is located at the top of the water storage tank 2, and the sewage outlet 26 is located at the bottom of the water storage tank 2.

[0025] The two ends of the first connecting pipe 3 are connected to the first water inlet 13 and the second water outlet 22 respectively, and the two ends of the second connecting pipe 4 are connected to the first water outlet 14 and the second water inlet 21 respectively. The first water outlet 14, the second water outlet 22, the third water inlet 23, the third water outlet 24 and the sewage outlet 26 are all provided with valves 5;

[0026] In this way, when in use, the water-cooled heat exchanger 1 can be connected to the outlet of the air compressor through the air inlet 11, and then the air outlet 12 and the equipment that needs to compress the gas are connected through a pipeline, so that the water-cooled heat exchanger 1 can be installed between the air compressor and the required equipment;

[0027] Since the height of the water storage tank 2 is higher than that of the water-cooled heat exchanger 1, the cold water in the water storage tank 2 will flow from the second water outlet 22 along the first connecting pipe 3 into the first water inlet 13 by gravity, so that the cold water enters the water-cooled heat exchanger 1;

[0028] In this way, when the air compressor generates hot air at the outlet, and the hot air enters the water-cooled heat exchanger 1 through the air inlet 11, the heat in the hot air can be absorbed by the cold water in the water-cooled heat exchanger 1, thereby cooling the hot air, and finally the cooled air enters the required equipment through the air outlet 12. In this way, the hot air blown out by the air compressor can be cooled by the water-cooled heat exchanger 1, thereby preventing the compressed gas from overheating and causing damage to the equipment.

[0029] The water-cooled heat exchanger 1 in the present application is a prior art device that can be purchased on the market, and the present application does not improve the water-cooled heat exchanger 1 itself, so no further description is given;

[0030] When the cold water in the water-cooled heat exchanger 1 absorbs the heat of the compressed gas, the water temperature increases and becomes hot water. Since the density of hot water is smaller than that of cold water, the heated water will flow upward, and enter the second connecting pipe 4 through the first water outlet 14, and then enter the water storage tank 2 along the second connecting pipe 4. In this way, the hot water can enter the water storage tank 2 to heat the water in the water storage tank 2. At the same time, the water in the water storage tank 2 will continuously enter the water-cooled heat exchanger 1 through the first connecting pipe 3.

[0031] In this way, the cold water in the water storage tank 2 can continuously enter the water-cooled heat exchanger 1 to cool the compressed air in the water-cooled heat exchanger 1. At the same time, the hot water that has absorbed heat in the water-cooled heat exchanger 1 will continuously flow into the water storage tank 2 to heat the water in the water storage tank 2. In this way, the heat in the compressed air can be recovered into the water storage tank 2 in the form of hot water. In this way, the hot water in the water storage tank 2 can be used for the production needs of the factory and the daily life of the staff, thereby recycling the heat in the compressed air and avoiding the waste and thermal pollution caused by the direct discharge of the heat in the compressed air into the air, thereby making the device more environmentally friendly. At the same time, when the factory uses hot water, it does not need to heat the water separately, which can reduce the production cost of the factory.

[0032] Moreover, by taking advantage of the different densities of water at different temperatures, the device does not need to install an additional driving source such as a water pump when in use, so that water can circulate in the water storage tank 2 and the water-cooled heat exchanger 1. This can further reduce the cost of the device and make the device more energy-saving, environmentally friendly and practical.

[0033] Specifically, in this embodiment, the second water inlet 21 is located at the lower end of one side of the water storage tank 2, and the second water outlet 22 is located at the lower end of the other side of the water storage tank 2, and the second water inlet 21 and the second water outlet 22 are located in the same horizontal plane;

[0034] In this way, after the hot water enters the water tank 2 through the second water inlet 21, the hot water will gradually flow upwards, and the cold water will continue to sink, so that the cold water can be input into the water-cooled heat exchanger 1 through the second water outlet 22 to cool the compressed air. In this way, the device can ensure that the compressed air is cooled while allowing the hot water to circulate continuously from bottom to top in the water tank 2 to circulate and heat the water in the water tank 2. In this way, the water in the water tank 2 can be heated more evenly, thereby accelerating the heating efficiency of the cold water in the water tank 2, which is convenient for production and daily life use and has strong practicality.

[0035] More specifically, a heat-insulating layer is provided in the water storage tank 2;

[0036] This can enhance the heat preservation effect of the water storage tank 2 and increase the storage time of hot water in the water storage tank 2, so that the staff can take it out at any time, which is convenient for use.

[0037] Wherein, the second connecting pipe 4 is covered with a sponge insulation sleeve;

[0038] This can enhance the heat preservation effect of the second connecting pipe 4, avoid partial heat loss and waste when hot water flows from the water-cooled heat exchanger 1 to the water storage tank 2, thereby ensuring heat recovery efficiency and strong practicality.

[0039] Preferably, a shielding cover 27 is provided at the top of the water storage tank 2;

[0040] This can prevent some debris from falling into the water tank 2 through the opening 25 and contaminating the hot water in the water tank 2 .

[0041] In the description of the present application, it should be noted that the terms "upper", "lower", 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0042] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0043] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A compressed air heat recovery device for heat recycling, characterized in that: It includes: A water-cooled heat exchanger (1), wherein the water-cooled heat exchanger (1) is provided with an air inlet (11), an air outlet (12), a first water inlet (13) and a first water outlet (14), wherein the first water inlet (13) is located below the first water outlet (14); A water storage tank (2) located above the water-cooled heat exchanger (1), the water storage tank (2) being provided with a second water inlet (21), a second water outlet (22), a third water inlet (23), a third water outlet (24), an opening (25) and a sewage outlet (26), the opening (25) being located at the top end of the water storage tank (2), and the sewage outlet (26) being located at the bottom end of the water storage tank (2); A first connecting pipe (3), two ends of which are respectively connected to the first water inlet (13) and the second water outlet (22); A second connecting pipe (4), the two ends of which are respectively connected to the first water outlet (14) and the second water inlet (21); Valves (5) are provided on the first water outlet (14), the second water outlet (22), the third water inlet (23), the third water outlet (24) and the sewage outlet (26).

2. A compressed air heat recovery device for heat reuse according to claim 1, characterized in that: The second water inlet (21) is located at the lower end of one side of the water storage tank (2), and the second water outlet (22) is located at the lower end of the other side of the water storage tank (2). The second water inlet (21) and the second water outlet (22) are located on the same horizontal plane.

3. The compressed air heat recovery device for heat reuse according to claim 1, characterized in that: A heat-insulating layer is provided inside the water storage tank (2).

4. The compressed air heat recovery device for heat reuse according to claim 1, characterized in that: The second connecting pipe (4) is covered with a sponge insulation cover.

5. The compressed air heat recovery device for heat reuse according to claim 1, characterized in that: The top of the water storage tank (2) is provided with a shielding cover (27).

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