Waste heat recycling system of oil injection screw air compressor

Abstract

The utility model discloses an oil injection screw air compressor waste heat recycling system which comprises an air compressor body, the outer side surface of the air compressor body is sleeved with a waste heat absorption cylinder, the side, making contact with the air compressor body, of the waste heat absorption cylinder is provided with a heat conduction plate, and two water outlet pipes are symmetrically arranged on the lower portion of the side surface of the waste heat absorption cylinder. The two water outlet pipes communicate with each other and communicate with a first water drainage pipe, a first water pump is arranged on the first water drainage pipe, the first water drainage pipe is connected with a waste heat utilization assembly, heat generated when the air compressor body works is absorbed through a heat conduction plate wrapping the outer side of the air compressor body, and circulating water in a waste heat recycling barrel is heated; the first water pump conveys heated water into the waste heat utilization assembly through the two water outlet pipes along the first drainage pipe, heat absorbed by the waste heat utilization assembly can be used for domestic hot water, air conditioner heating, boiler inlet water preheating, process hot water and the like, energy waste and environmental pollution are avoided, and energy conservation and environmental protection are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization of air compressors, in particular to a waste heat recovery and utilization system for an oil-injected screw air compressor. Background Art

[0002] As a major energy consumer in the manufacturing industry, air compressors generate a large amount of waste heat during operation. Especially for oil-injected screw air compressors, most of the heat generated during the compression process is dissipated through the lubricating oil system. The traditional air compressor cooling system can only discharge heat into the atmosphere, which not only wastes energy but also may pollute the environment. Therefore, we propose a waste heat recovery and utilization system for oil-injected screw air compressors. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a waste heat recovery and utilization system for an oil-injected screw air compressor. The heat absorbed by the waste heat utilization component can be used for domestic hot water, air conditioning heating, boiler water preheating, process hot water and other purposes, avoiding energy waste and environmental pollution, being beneficial to energy conservation and environmental protection, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery and utilization system for an oil-injected screw air compressor, comprising an air compressor body, a waste heat absorption cylinder is sleeved on the outer surface of the air compressor body, the side of the waste heat absorption cylinder in contact with the air compressor body is a heat conduction plate, two water outlet pipes are symmetrically arranged on the lower part of the side surface of the waste heat absorption cylinder, the two water outlet pipes are connected to each other and to a first drain pipe, a first water pump is arranged on the first drain pipe, and the first drain pipe is connected to a waste heat utilization component, the waste heat utilization component is connected to a tail pipe, a third water pump is arranged on the tail pipe, the tail pipe is connected to a return water pipe, the end of the return water pipe is connected to the upper part of the side surface of the waste heat absorption cylinder, and a fourth water pump is installed on the return water pipe.

[0005] As a preferred technical solution of the utility model, the gap between the heat-conducting plate and the outer shell of the air compressor body is filled with a thermally conductive silicone grease layer.

[0006] As a preferred technical solution of the utility model, the waste heat utilization component includes a first heating cylinder connected to a first drain pipe, a first heat storage tank is arranged in the first heating cylinder, and a first heat supply pipe is arranged on the upper surface of the first heat storage tank; a second drain pipe is arranged on the side surface of the first heating cylinder, a second water pump is arranged on the second drain pipe, and the second drain pipe is connected to the second heating cylinder, a second heat storage tank is arranged in the second heating cylinder, and a second heat supply pipe is arranged on the upper surface of the second heat storage tank; heating chambers are opened inside the first heating cylinder and the second heating cylinder, the first drain pipe passes the high-temperature water in the waste heat absorption cylinder into the heating chamber of the first heating cylinder and heats the heat storage material in the first heat storage tank, and the second drain pipe passes the high-temperature water in the heating chamber of the first heating cylinder into the heating chamber of the second heating cylinder and heats the heat storage material in the second heat storage tank.

[0007] As a preferred technical solution of the utility model, a heat dissipation pipe is arranged between the tail pipe and the return pipe.

[0008] As a preferred technical solution of the utility model, the heat dissipation pipe is a serpentine pipe, and the diameter of the heat dissipation pipe is larger than the diameters of the tail pipe and the return pipe.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: the heat generated during operation is absorbed by the heat conduction plate coated on the outside of the air compressor body, and the circulating water in the waste heat recovery cylinder is heated; the first water pump sends the heated water along the first drain pipe to the waste heat utilization component through two outlet pipes; the heat absorbed by the waste heat utilization component can be used for domestic hot water, air conditioning heating, boiler water preheating, process hot water and other purposes, avoiding energy waste and pollution to the environment, and is beneficial to energy conservation and environmental protection; after the circulating water is cooled by the waste heat utilization component, the low-temperature water returns to the waste heat absorption cylinder through the tail pipe and the return pipe; through the continuous recycling of the circulating water, the air compressor body can be effectively cooled, ensuring the normal use of the oil-injected screw air compressor and effectively extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 It is a side view structural schematic diagram of the utility model;

[0012] Figure 3 It is a front view structural schematic diagram of the utility model.

[0013] In the figure: 1 air compressor body, 2 waste heat absorption tube, 3 heat conduction plate, 4 thermal grease layer, 5 water outlet pipe, 6 first drainage pipe, 7 first water pump, 8 first heating tube, 9 first heat storage tank, 10 first heating pipe, 11 second drainage pipe, 12 second water pump, 13 second heating tube, 14 second heat storage tank, 15 second heating pipe, 16 tail pipe, 17 third water pump, 18 heat dissipation pipe, 19 return pipe, 20 fourth water pump. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-3 The utility model provides a technical solution: a waste heat recovery and utilization system for an oil-injected screw air compressor, comprising an air compressor body 1, a waste heat absorption cylinder 2 is sleeved on the outer surface of the air compressor body 1, a heat conduction plate 3 is provided on the side of the waste heat absorption cylinder 2 in contact with the air compressor body 1, the shape of the heat conduction plate 3 is adapted and fitted to the shape of the heat dissipation shell of the air compressor body 1, and the heat conduction plate 3 is preferably made of an aluminum alloy with good thermal conductivity, and the heat generated during operation by the heat conduction plate 3 coated on the outer side of the air compressor body 1 is absorbed to heat the circulating water in the waste heat recovery cylinder 2.

[0016] Two water outlet pipes 5 are symmetrically arranged on the lower part of the side surface of the waste heat absorption cylinder 2. The two water outlet pipes 5 are connected to each other and to the first drainage pipe 6. A first water pump 7 is arranged on the first drainage pipe 6, and the first drainage pipe 6 is connected to the waste heat utilization component. The first water pump 7 sends the heated water along the first drainage pipe 6 to the waste heat utilization component through the two water outlet pipes 5. The heat absorbed by the waste heat utilization component can be used for domestic hot water, air conditioning heating, boiler water preheating, process hot water and other purposes, avoiding energy waste and environmental pollution, and is beneficial to energy saving and environmental protection.

[0017] The waste heat utilization component is connected to the tail pipe 16, and a third water pump 17 is arranged on the tail pipe 16. The tail pipe 16 is connected to the return pipe 19, and the end of the return pipe 19 is connected to the upper side surface of the waste heat absorption tube 2, and a fourth water pump 20 is installed on the return pipe 19. After the circulating water is cooled by the waste heat utilization component, the low-temperature water returns to the waste heat absorption tube 2 through the tail pipe 16 and the return pipe 19. Through the continuous recycling of the circulating water, the air compressor body 1 can be effectively cooled, thereby ensuring the normal use of the oil-injected screw air compressor and effectively extending its service life.

[0018] Optionally, the shell of the waste heat absorption tube 2 is thicker, and heat insulation measures are taken, such as a built-in vacuum chamber or built-in heat insulation foam, so as to avoid heat loss during the waste heat utilization process and reduce the waste heat utilization rate.

[0019] A preferred technical solution is that the gap between the heat conducting plate 3 and the outer shell of the air compressor body 1 is filled with a thermal grease layer 4. The thermal grease can fill the gap between the components to form a heat conduction channel, thereby accelerating the transfer and heat dissipation of heat, making the heat dissipation and waste heat utilization of the air compressor more efficient.

[0020] The preferred technical solution is that the waste heat utilization component includes a first heating cylinder 8 connected to the first drain pipe 6, a first heat storage tank 9 is arranged in the first heating cylinder 8, and a first heat supply pipe 10 is arranged on the upper surface of the first heat storage tank 9; a second drain pipe 11 is arranged on the side surface of the first heating cylinder 8, a second water pump 12 is arranged on the second drain pipe 11, and the second drain pipe 11 is connected to the second heating cylinder 13, a second heat storage tank 14 is arranged in the second heating cylinder 13, and a second heat supply pipe 15 is arranged on the upper surface of the second heat storage tank 14. Heat storage materials such as water or other liquids are arranged in the first heat storage tank 9 and the second heat storage tank 14, which can be flexibly arranged according to the specific scenario of waste heat utilization. The first heat supply pipe 10 and the second heat supply pipe 15 are respectively connected to corresponding external equipment to supply the heated heat storage material to the external heating equipment for various purposes such as domestic hot water, air conditioning heating, boiler water preheating, process hot water, etc.

[0021] By arranging two heating cylinders and a heat storage tank, etc., the waste heat generated from the air compressor can be more effectively utilized, wherein the first heating cylinder 8 and the first heat storage tank 9 are used to store high temperature to supply life or production with higher temperature requirements, and the second heating cylinder 13 and the second heat storage tank 14 are used to store medium temperature to supply life or production with medium temperature requirements. The waste heat utilization efficiency is improved through multi-stage waste heat utilization, and the return water temperature is further reduced, which can effectively dissipate heat and cool the air compressor body 1.

[0022] A heating chamber is provided inside the first heating tube 8 and the second heating tube 13. The first drainage pipe 6 passes the high-temperature water in the waste heat absorption tube 2 into the heating chamber of the first heating tube 8 and heats the heat storage material in the first heat storage tank 9. The second drainage pipe 11 passes the high-temperature water in the heating chamber of the first heating tube 8 into the heating chamber of the second heating tube 13 and heats the heat storage material in the second heat storage tank 14.

[0023] Optionally, the inner walls of the first heating tube 8 and the second heating tube 13 are relatively thin, and are preferably made of aluminum alloy with good thermal conductivity, so as to facilitate the heat of the high-temperature water in the heating chamber to be transferred to the first heat storage tank 9 and the second heat storage tank 14; the outer walls of the first heating tube 8 and the second heating tube 13 are relatively thick, and are preferably made of materials with good thermal insulation properties such as vacuum insulation panels, polyurethane foam materials, etc., for reducing the dissipation of heat to the outside and improving the utilization rate of waste heat.

[0024] According to a preferred technical solution, a heat dissipation pipe 18 is provided between the tail pipe 16 and the return pipe 19 , and the water in the tail pipe 16 is sent to the heat dissipation pipe 18 through a third water pump 17 for the final stage of heat dissipation, which can further reduce the temperature of the water entering the return pipe 19 .

[0025] A further preferred technical solution is that the heat dissipation pipe 18 is a serpentine pipe, and the diameter of the heat dissipation pipe 18 is larger than the diameters of the tail pipe 16 and the return water pipe 19, which greatly increases the surface area of ​​the heat dissipation pipe 18, and the heat dissipation speed is faster and the cooling effect is better. The heat generated by the air compressor during operation is quickly taken away through the circulation of water, thereby ensuring that the air compressor can operate stably and avoiding various problems caused by overheating.

[0026] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A waste heat recovery system for an oil-injected screw air compressor, comprising an air compressor body (1), characterized in that: The outer surface of the air compressor body (1) is sleeved with a waste heat absorption cylinder (2), and the side of the waste heat absorption cylinder (2) in contact with the air compressor body (1) is a heat conduction plate (3). Two water outlet pipes (5) are symmetrically arranged at the lower part of the side surface of the waste heat absorption cylinder (2), and the two water outlet pipes (5) are connected to each other and to a first drainage pipe (6). A first water pump (7) is arranged on the first drainage pipe (6), and the first drainage pipe (6) is connected to a waste heat utilization component, and the waste heat utilization component is connected to a tail pipe (16). A third water pump (17) is arranged on the tail pipe (16), and the tail pipe (16) is connected to a return pipe (19). The end of the return pipe (19) is connected to the upper part of the side surface of the waste heat absorption cylinder (2), and a fourth water pump (20) is installed on the return pipe (19).

2. The waste heat recovery system for an oil-injected screw air compressor according to claim 1 is characterized in that: The gap between the heat conducting plate (3) and the outer shell of the air compressor body (1) is filled with a heat conducting silicone grease layer (4).

3. The waste heat recovery system for an oil-injected screw compressor according to claim 1 is characterized in that: The waste heat utilization component comprises a first heating cylinder (8) connected to a first drainage pipe (6), a first heat storage tank (9) being arranged in the first heating cylinder (8), and a first heat supply pipe (10) being arranged on the upper surface of the first heat storage tank (9); a second drainage pipe (11) being arranged on the side surface of the first heating cylinder (8), a second water pump (12) being arranged on the second drainage pipe (11), and the second drainage pipe (11) being connected to a second heating cylinder (13), a second heat storage tank (14) being arranged in the second heating cylinder (13), and the second heat storage tank (14) being arranged on the upper surface of the first heat storage tank (9); A second heat supply pipe (15) is arranged on the upper surface of the heat tank (14); a heating chamber is provided inside the first heating tube (8) and the second heating tube (13); the first drainage pipe (6) passes the high-temperature water in the waste heat absorption tube (2) into the heating chamber of the first heating tube (8) and heats the heat storage material in the first heat storage tank (9); the second drainage pipe (11) passes the high-temperature water in the heating chamber of the first heating tube (8) into the heating chamber of the second heating tube (13) and heats the heat storage material in the second heat storage tank (14).

4. The waste heat recovery system for an oil-injected screw compressor according to claim 1 is characterized in that: A heat dissipation pipe (18) is provided between the tail pipe (16) and the water return pipe (19).

5. The waste heat recovery system for an oil-injected screw compressor according to claim 4 is characterized in that: The heat dissipation pipe (18) is a serpentine pipe, and the diameter of the heat dissipation pipe (18) is larger than the diameters of the tail pipe (16) and the return water pipe (19).

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