Energy recovery device of air compressor

Abstract

The utility model relates to the technical field of mine field equipment, in particular to an energy recovery device of an air compressor. The system comprises a heat exchanger, an oil path control loop and a water path control loop, the oil path control loop and the water path control loop are connected with the heat exchanger, the oil path control loop adopts double-loop arrangement and comprises a recovery pipeline and a temperature control pipeline, and the recovery pipeline comprises an air compressor, an oil-gas separator and an oil cooler; the temperature control pipeline comprises an oil filter, cooled oil passes through the oil filter and then is input into the air compressor again, and the temperature of the air compressor is adjusted; the waterway control loop comprises a water inlet valve and a load, and the water inlet valve is connected with a water inlet pipeline and connected to a water inlet of the heat exchanger. A load is connected to the water outlet of the heat exchanger. According to the utility model, the oil path control loop is arranged in a double-loop manner, so that stable circulation and temperature regulation of the oil path are ensured, the temperature of the air compressor is accurately controlled, and the stability and the service life of equipment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mine equipment, specifically relates to a kind of air compressor energy recovery device. BACKGROUND

[0002] Air compressor is commonly used machinery in mine, and energy consumption accounts for as high as 10%~35%. During operation, most of the input energy is converted into heat energy and discharged, which is not effectively utilized. To solve this problem, technicians have made many explorations, such as the waste heat recovery energy-saving system disclosed in Chinese patent CN207513841U, which recovers the heat of lubricating oil and indirectly exchanges heat twice to meet the heating needs of industrial production. However, the existing technology still has shortcomings: the oil circuit control loop lacks stable circulation and temperature regulation mechanism, the oil temperature fluctuates greatly, affecting the operation and performance stability of the air compressor; at the same time, it lacks key components such as oil filter, check valve, oil cut valve and oil drain valve, making it difficult to achieve accurate control of the temperature of the air compressor. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an air compressor energy recovery device.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An air compressor energy recovery device includes a heat exchanger, an oil circuit control loop and a water circuit control loop connected to the heat exchanger, wherein:

[0006] The oil circuit control loop is set up with a double circuit, including a recovery pipeline and a temperature control pipeline, wherein:

[0007] The recovery pipeline includes an air compressor, an oil-gas separator and an oil cooler. The heat energy generated by the air compressor is absorbed by the oil, which enters the oil-gas separator through the oil inlet. The oil-gas separator separates the oil from the gas. The oil enters the heat exchanger through the oil outlet for heat exchange, and the gas is discharged after being cooled by the oil cooler. The oil after heat exchange is cooled by the oil cooler;

[0008] The temperature control pipeline includes an oil filter. The cooled oil is re-input into the air compressor through the oil filter to adjust the temperature of the air compressor.

[0009] The water circuit control loop includes a water inlet valve and a load. The water inlet valve is connected to the water inlet pipeline and connected to the water inlet of the heat exchanger. The load is connected to the water outlet of the heat exchanger.

[0010] The technical scheme recovers heat energy generated by the air compressor through the heat exchanger, adjusts the oil temperature through the heat exchanger bypass valve and the oil cooler bypass valve, realizes effective recovery of the heat energy of the air compressor and reasonable control of the oil temperature, improves energy utilization efficiency, and reduces production cost. Specifically, a large amount of heat energy is generated during the operation of the air compressor, and the heat energy generated by the air compressor is absorbed by oil through the recovery pipeline in the oil circuit control loop; the oil after absorbing the heat energy enters the oil-gas separator to separate the oil and gas; the separated oil enters the heat exchanger through the oil outlet; in the heat exchanger, the oil releases the heat energy carried by the oil, and the heat energy is absorbed by water in the water circuit control loop, so as to realize conversion and utilization of the heat energy; the temperature control pipeline in the oil circuit control loop plays a role in adjusting the temperature of the air compressor; the oil after heat exchange in the heat exchanger is preliminarily cooled; the cooled oil is cooled again by the oil cooler, and the cooled oil is input into the air compressor after impurities are removed by the oil filter, to form a cycle, so as to ensure that the temperature of the air compressor fluctuates within a suitable range, and faults or performance degradation caused by excessively high or low temperature are avoided. The water circuit control loop is used for heat transfer and discharge, wherein: the water inlet valve controls the water flow in the water inlet pipeline to enter the heat exchanger, the temperature of the water is increased after the water absorbs the heat energy released by the oil, the water after temperature rising is discharged through the water outlet and connected to a load, such as a heating system or a hot water system, to realize utilization of the heat energy; the opening degree of the water inlet valve is adjusted to control the amount of water entering the heat exchanger, so as to adjust the heat transfer rate and the heat load of the system.

[0011] In addition, the air compressor energy recovery device according to the above-mentioned technical scheme of the utility model further has the following additional technical features:

[0012] According to an embodiment of the utility model, the air compressor further comprises a check valve, an oil cut-off valve and an oil discharge valve, wherein:

[0013] The check valve is located on one side of the air compressor and is used for connecting the oil inlet of the oil-gas separator to control the flow direction of the oil;

[0014] The oil cut-off valve is located on one side of the air compressor and is used for connecting the outlet of the oil filter to adjust the temperature of the air compressor;

[0015] The oil discharge valve is respectively located at the check valve and the oil cut-off valve and is used for discharging the oil in the oil circuit control loop.

[0016] The technical scheme adds the check valve, the oil cut-off valve and the oil discharge valve to control the flow direction of the oil circuit, adjust the temperature of the air compressor and facilitate the discharge of the oil in the oil circuit control loop.

[0017] According to an embodiment of the utility model, the oil-gas separator further comprises an oil level indicator and an oil discharge plug, wherein:

[0018] The oil level indicator is located on the side of the oil-gas separator and is used for indicating the liquid level of the oil inside;

[0019] An oil drain plug is arranged at the bottom of the oil-gas separator for draining oil in the oil-gas separator.

[0020] The oil level indicator and the oil drain plug are arranged in the oil-gas separator, so that the oil level can be observed and the oil in the oil-gas separator can be drained.

[0021] According to an embodiment of the present application, the heat exchanger further comprises a bypass valve I, which is arranged at the oil inlet end of the heat exchanger, and the oil inlet end of the heat exchanger is connected to the oil outlet of the oil-gas separator through the bypass valve I.

[0022] The bypass valve I is arranged in the heat exchanger, so that an alternative oil path connection mode is provided to flexibly control the heat exchange process.

[0023] According to an embodiment of the present application, the load comprises a heating system and a hot water system.

[0024] The hot water system of the present application is used in the specific application scenario of employee shower, for example, the load is a rain pipe of an employee shower room, and the recovered heat energy is used for employee shower.

[0025] According to an embodiment of the present application, the oil cooler further comprises a fan and a bypass valve II, wherein:

[0026] The fan is arranged at one side of the oil cooler and is used for secondary cooling of the oil discharged from the oil-gas separator and the oil after preliminary heat exchange.

[0027] The bypass valve II is arranged at the outlet of the oil cooler and is used for connecting the oil filter.

[0028] The fan and the bypass valve II are arranged in the oil cooler, so that the cooling effect is enhanced, and the oil flow direction is more flexible.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] (1) The heat energy generated by the air compressor is recovered by the heat exchanger and used in the water path control circuit, so that the energy is efficiently recovered and utilized.

[0031] (2) The oil path control circuit with the double-circuit structure ensures the stable circulation and temperature regulation of the oil path, and cooperates with the oil filter, the check valve, the oil cut valve and the oil drain valve, so that the temperature of the air compressor is accurately controlled, and the stability and service life of the equipment are improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of the present application.

[0033] In the figure: 1. Air compressor; 11. Check valve; 12. Oil shut-off valve; 13. Oil drain valve; 2. Oil-gas separator; 21. Oil inlet; 22. Oil outlet; 23. Oil level indicator; 24. Oil drain plug; 3. Heat exchanger; 31. Bypass valve I; 32. Water inlet valve; 33. Load; 4. Oil cooler; 41. Fan; 42. Bypass valve II; 5. Oil filter. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides an air compressor energy recovery device, including a heat exchanger 3, and an oil control circuit and a water control circuit connected to the heat exchanger 3, wherein:

[0037] The oil control circuit adopts a dual-circuit setting, including a recovery line and a temperature control line, where:

[0038] The recovery pipeline includes an air compressor 1, an oil-gas separator 2, and an oil cooler 4. The heat energy generated by the air compressor 1 is absorbed by the oil and enters the oil-gas separator 2 through the oil inlet 21. The oil-gas separator 2 separates the oil and the gas. The oil enters the heat exchanger 3 through the oil outlet 22 for heat exchange. The gas is cooled by the oil cooler 4 and then discharged. The oil after heat exchange is cooled by the oil cooler 4.

[0039] The temperature control pipeline includes an oil filter 5. The cooled oil passes through the oil filter 5 and is re-input into the air compressor 1 to adjust the temperature of the air compressor 1;

[0040] The water control circuit includes a water inlet valve 32 and a load 33 . The water inlet valve 32 is connected to the water inlet pipeline and to the water inlet of the heat exchanger 3 ; the load 33 is connected to the water outlet of the heat exchanger 3 .

[0041] like Figure 1As shown, the technical scheme recovers the heat energy generated by the air compressor 1 through the heat exchanger 3, and adjusts the oil temperature through the bypass valve of the heat exchanger 3 and the bypass valve of the oil cooler 4, so that the heat energy of the air compressor 1 is effectively recovered and the oil temperature is reasonably controlled, the energy utilization efficiency is improved, and the production cost is reduced. Specifically, a large amount of heat energy is generated during the operation of the air compressor 1, and the heat energy generated by the air compressor 1 is absorbed by the oil through the recovery pipeline in the oil circuit control loop; the oil after absorbing the heat energy enters the oil-gas separator 2 to separate the oil and gas; the separated oil enters the heat exchanger 3 through the oil outlet 22; in the heat exchanger 3, the oil releases the heat energy carried by it, and the heat energy is absorbed by the water in the water circuit control loop, so that the heat energy is converted and utilized; the temperature control pipeline in the oil circuit control loop plays a role in adjusting the temperature of the air compressor 1; the oil after heat exchange in the heat exchanger 3 will be preliminarily reduced in temperature; then the oil is cooled again in the oil cooler 4, and the cooled oil is filtered by the oil filter 5 to remove impurities, and then re-input into the air compressor 1, forming a cycle to ensure that the temperature of the air compressor 1 fluctuates within a suitable range, avoiding faults or performance degradation caused by excessively high or low temperature. The water circuit control loop is used for heat transfer and discharge, wherein: the water inlet valve 32 controls the water flow of the water inlet pipeline into the heat exchanger 3, and the temperature of the water rises after absorbing the heat energy released by the oil; the heated water is discharged through the water outlet and connected to the load 33, such as a heating system or a hot water system, to realize the utilization of heat energy; by adjusting the opening of the water inlet valve 32, the amount of water entering the heat exchanger 3 is controlled, so that the heat transfer rate and the heat load of the system are adjusted.

[0042] In addition, according to the air compressor energy recovery device provided in the above-mentioned utility model, the following additional technical features are further provided.

[0043] According to an embodiment of the utility model, the air compressor 1 further comprises a one-way valve 11, an oil cutoff valve 12 and an oil discharge valve 13, wherein:

[0044] The one-way valve 11 is located on one side of the air compressor 1 and is used to connect the oil inlet 21 of the oil-gas separator 2 to control the flow direction of the oil.

[0045] The oil cutoff valve 12 is located on one side of the air compressor 1 and is used to connect the outlet of the oil filter 5 to adjust the temperature of the air compressor 1.

[0046] The oil discharge valve 13 is respectively located at the one-way valve 11 and the oil cutoff valve 12 to discharge the oil in the oil circuit control loop.

[0047] The technical scheme adds the one-way valve 11, the oil cutoff valve 12 and the oil discharge valve 13 to control the flow direction of the oil circuit, adjust the temperature of the air compressor 1, and facilitate the discharge of the oil in the oil circuit control loop.

[0048] According to an embodiment of the utility model, the oil-gas separator 2 further comprises an oil level indicator 23 and an oil discharge plug 24, wherein:

[0049] An oil level indicator 23 is arranged on the side of the oil-gas separator 2 and used for indicating the liquid level of the oil inside;

[0050] An oil discharge plug 24 is arranged on the bottom of the oil-gas separator 2 and used for discharging the oil inside the oil-gas separator 2.

[0051] The technical solution adds the oil level indicator 23 and the oil discharge plug 24 to the oil-gas separator 2, which facilitates the observation of the liquid level of the oil and the discharge of the oil inside the oil-gas separator 2.

[0052] According to an embodiment of the present application, the heat exchanger 3 further comprises a bypass valve I 31, which is arranged at the oil inlet end of the heat exchanger 3 and connected to the oil outlet 22 of the oil-gas separator 2 through the bypass valve I 31.

[0053] The technical solution adds the bypass valve I 31 to the heat exchanger 3, which provides an alternative oil path connection mode to flexibly control the heat exchange process.

[0054] According to an embodiment of the present application, the load 33 comprises a heating system and a hot water system.

[0055] The hot water system of the technical solution, for example, the rain pipe of the shower room of the staff, uses the recovered heat energy for the specific application scenario of the shower of the staff.

[0056] According to an embodiment of the present application, the oil cooler 4 further comprises a fan 41 and a bypass valve II 42, wherein:

[0057] The fan 41 is arranged on one side of the oil cooler 4 and used for the secondary cooling of the oil discharged from the oil-gas separator 2 and the oil after the preliminary heat exchange;

[0058] The bypass valve II 42 is arranged at the outlet of the oil cooler 4 and used for connecting the oil filter 5.

[0059] The technical solution adds the fan 41 and the bypass valve II 42 to the oil cooler 4, which enhances the cooling effect and provides more flexible flow selection for the oil.

[0060] The use process of the above embodiment is as follows:

[0061] As Figure 1As shown, in the oil circuit control loop, the thermal energy generated by the air compressor 1 is absorbed by the oil, and after the oil is separated in the oil-gas separator 2, it enters the heat exchanger 3 for heat exchange, then passes through the oil cooler 4 for temperature reduction, and finally returns to the air compressor 1 through the oil filter 5 to adjust the temperature; in the water circuit control loop, the water enters the heat exchanger 3 through the water inlet valve 32, absorbs the thermal energy of the oil, and is used by the load 33, such as employee shower; the one-way valve 11, the oil cutoff valve 12 and the oil discharge valve 13 ensure smooth oil circuit and adjust the temperature; the oil level indicator 23 and the oil discharge plug 24 on the oil-gas separator 2 facilitate the management of oil quantity; the heat exchanger 3 and the oil cooler 4 are respectively provided with bypass valves to provide a backup path; the fan 41 of the oil cooler 4 enhances the cooling effect and ensures efficient operation of the system. The whole device realizes effective utilization and recovery of the energy of the air compressor 1.

[0062] Although the utility model is described in detail by referring to the attached drawings and in combination with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, those skilled in the art can make various equivalent modifications or replacements to the embodiments of the utility model, and these modifications or replacements should be within the scope of the utility model. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, and these changes or replacements should be within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An air compressor energy recovery device, characterized in that: The invention comprises a heat exchanger (3), and an oil control circuit and a water control circuit connected to the heat exchanger (3), wherein: The oil control circuit adopts a dual-circuit setting, including a recovery line and a temperature control line, where: The recovery pipeline includes an air compressor (1), an oil-gas separator (2) and an oil cooler (4). The heat energy generated by the air compressor (1) is absorbed by the oil and enters the oil-gas separator (2) through the oil inlet (21). The oil-gas separator (2) separates the oil and the gas. The oil enters the heat exchanger (3) through the oil outlet (22) for heat exchange. The gas is cooled by the oil cooler (4) and then discharged. The oil after heat exchange is cooled by the oil cooler (4). The temperature control pipeline includes an oil filter (5), and the cooled oil passes through the oil filter (5) and is then re-input into the air compressor (1) to adjust the temperature of the air compressor (1); The water control circuit includes a water inlet valve (32) and a load (33). The water inlet valve (32) is connected to the water inlet pipeline and connected to the water inlet of the heat exchanger (3); the load (33) is connected to the water outlet of the heat exchanger (3).

2. The air compressor energy recovery device according to claim 1, characterized in that: The air compressor (1) further comprises a one-way valve (11), an oil cut-off valve (12) and an oil drain valve (13), wherein: A one-way valve (11) is located on one side of the air compressor (1) and is used to connect to the oil inlet (21) of the oil-gas separator (2) to control the flow direction of the oil; An oil shut-off valve (12), located on one side of the air compressor (1), is used to connect to the outlet of the oil filter (5) and regulate the temperature of the air compressor (1); The oil drain valve (13) is located at the one-way valve (11) and the oil cut-off valve (12) and is used to drain the oil from the oil control circuit.

3. The air compressor energy recovery device according to claim 1, characterized in that: The oil-gas separator (2) further comprises an oil level indicator (23) and an oil drain plug (24), wherein: An oil level indicator (23), located on the side of the oil-gas separator (2), is used to indicate the level of the oil inside; The oil drain plug (24) is located at the bottom of the oil-gas separator (2) and is used to drain the oil in the oil-gas separator (2).

4. The air compressor energy recovery device according to claim 1, characterized in that: The heat exchanger (3) further comprises a bypass valve I (31), which is located at the oil inlet end of the heat exchanger (3). The oil inlet end of the heat exchanger (3) is connected to the oil outlet (22) of the oil-gas separator (2) via the bypass valve I (31).

5. The air compressor energy recovery device according to claim 1, characterized in that: The load (33) includes a heating system and a hot water system.

6. The air compressor energy recovery device according to claim 1, characterized in that: The oil cooler (4) further comprises a fan (41) and a bypass valve II (42), wherein: The fan (41) is located on one side of the oil cooler (4) and is used to perform secondary cooling on the gas discharged from the oil-gas separator (2) and the oil after the initial heat exchange; The bypass valve II (42) is located at the outlet of the oil cooler (4) and is used to connect to the oil filter (5).

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