Gas compressor inter-stage waste heat utilization system

Abstract

The utility model relates to the technical field of heat recovery, specifically disclose a gas compressor section inter -stage waste heat utilization system, including the box body, and locate the heat exchange subassembly in the box body, the heat exchange subassembly includes a plurality of vertical heat exchanger, inlet pipe, exhaust pipe, water inlet pipe and drain pipe, inlet pipe and exhaust pipe are connected with the compressor, and water inlet pipe and drain pipe are connected with circulating water device, the heat exchanger includes the outer tube of vertical setting, the inner tube of vertical setting in the outer tube, the catheter of outer tube lower end side wall, the drain pipe of outer tube lower end and first valve on the drain pipe, the both ends of inner tube all respectively with water inlet pipe and drain pipe are connected after passing through the outer tube side wall, the outer tube upper end is connected with inlet pipe, and the catheter is connected with exhaust pipe, and the inner wall surface of outer tube is the openwork structure, the gas compressor section inter -stage waste heat utilization system of the utility model can effectively recover the heat of the compressed gas between the compressor sections and carry out the impurity removal to the compressed gas.

Description

Technical Field

[0001] This utility model relates to the technical field of heat recovery, and more specifically, to a waste heat utilization system for gas compressor sections. Background Technology

[0002] Gas compressors, as the core device for gas compression, are widely used in industry. Their compression process typically employs a segmented design, such as single-stage, two-stage, or three-stage compression. After each stage of compression, the compressed gas experiences a significant temperature rise due to the work done, requiring cooling before entering subsequent compression stages. It is noteworthy that these high-temperature compressed gases contain a large amount of usable heat energy, and heat is continuously generated during compressor operation. Directly discharging this heat not only wastes energy but may also increase the load on the cooling system.

[0003] In addition, compressed air often contains impurities such as lubricating fluid droplets, dust generated by mechanical wear, and condensate vapor. If these impurities are not removed in time, they will not only affect the subsequent compression efficiency but also reduce the purity of the gas, adversely affecting downstream processes. Therefore, designing a comprehensive treatment device for compressed air between compressor stages is of great significance. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat recovery system for gas compressor sections, which can effectively recover the heat of compressed gas between compressor sections and remove impurities from the compressed gas.

[0005] This utility model is achieved through the following technical solution: The waste heat utilization system between sections of the gas compressor of this utility model includes a housing and a heat exchange assembly disposed in the housing; the heat exchange assembly includes multiple vertically arranged heat exchangers, an air inlet pipe, an exhaust pipe, a water inlet pipe, and a drain pipe; the air inlet pipe and the exhaust pipe are connected to the compressor, and the water inlet pipe and the drain pipe are connected to a circulating water device; the heat exchanger includes a vertically arranged outer pipe, an inner pipe vertically arranged in the outer pipe, a guide pipe disposed on the lower side wall of the outer pipe, a drain pipe disposed on the lower end of the outer pipe, and a first valve disposed on the drain pipe; both ends of the inner pipe pass through the side wall of the outer pipe and are respectively connected to the water inlet pipe and the drain pipe; the upper end of the outer pipe is connected to the air inlet pipe, the guide pipe is connected to the exhaust pipe, and the inner wall of the outer pipe has a hollow structure.

[0006] Furthermore, the drain pipe extends downward after passing through the lower end wall of the box, and the first valve is located below the box.

[0007] Furthermore, a liquid storage box is provided on the drain pipe, and the liquid storage box is located between the conduit and the first valve.

[0008] Furthermore, the outer wall surface of the portion of the inner tube located inside the outer tube has a hollow structure.

[0009] Furthermore, the thickness of the hollow structure of the outer tube is 1 / 3 of the total wall thickness of the outer tube; the thickness of the hollow structure of the inner tube is 1 / 3 of the total wall thickness of the inner tube.

[0010] Furthermore, the upper end of the inner tube is connected to the drain pipe; the heat exchanger also includes a flushing pipe and a second valve disposed on the flushing pipe; one end of the flushing pipe is connected to the upper side wall of the inner tube, and the other end is connected to the upper side wall of the outer tube.

[0011] Furthermore, the box body is a closed structure, the flushing pipe is installed through the upper wall of the box body, and the second valve is located above the box body.

[0012] Furthermore, a pair of circulation pipes are connected to the side wall of the tank, and both of the circulation pipes are connected to the circulating water device.

[0013] Furthermore, the heat exchange components are provided in multiple quantities, and the multiple heat exchange components are evenly distributed along the horizontal direction.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects: In the gas compressor inter-stage waste heat utilization system of this utility model, during use, the inter-stage compressed gas generated by the compressor during compression is sent into the outer pipe through the inlet pipe, passes through the gap between the inner and outer pipes, and enters the conduit at the lower end of the outer pipe. Finally, it returns to the compressor through the exhaust pipe for subsequent compression. During its journey through the outer pipe, the compressed gas simultaneously contacts both the inner and outer pipe walls. A circulating water device sends water requiring heating into the inner pipe through the inlet pipe. After being heated by the compressed gas and the inner pipe, the water is returned to the circulating water device through the drain pipe. Water can also be injected into the housing, allowing the heat from the outer pipe to be directly transferred to the water in the housing, achieving cooling of the high-temperature compressed gas and heat recovery. Furthermore, because the inner wall of the outer tube has a hollow structure, components such as lubricating oil, water, and dust mixed in the compressed gas will liquefy and enter the hollow structure, gradually flowing downwards along the hollow structure of the inner wall of the outer tube. When a certain amount is accumulated, the mixture can be discharged by opening the first valve. In addition, the high-pressure gas will also help to spray the mixture out from the drain pipe. This can effectively prevent the mixture from corroding the outer and inner tubes, prevent the mixture from clogging in the outer tube, and also purify the compressed gas to a certain extent, improving the purity of the compressed gas. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the gas compressor inter-section waste heat utilization system provided in an embodiment of this utility model; Figure 2A two-view structural schematic diagram of the gas compressor inter-section waste heat utilization system provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the internal structure of the box provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the heat exchange component provided in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the heat exchanger portion provided in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the internal structure of the outer tube provided in an embodiment of the present utility model.

[0016] Icons: 11-Box body, 12-Circulation pipe, 20-Heat exchange component, 21-Outer pipe, 22-Inner pipe, 23-Air inlet pipe, 24-Conduit pipe, 25-Exhaust pipe, 26-Water inlet pipe, 27-Drain pipe, 28-Liquid drain pipe, 29-First valve, 210-Flush pipe, 211-Second valve, 212-Liquid storage tank. Detailed Implementation

[0017] Example The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 -Appendix Figure 6As shown, the waste heat utilization system between gas compressor sections in this embodiment includes a housing 11 and a heat exchange assembly 20 disposed in the housing 11. The heat exchange assembly 20 includes multiple vertically arranged heat exchangers, an inlet pipe 23, an exhaust pipe 25, a water inlet pipe 26, and a drain pipe 27. The inlet pipe 23 and the exhaust pipe 25 are connected to the compressor, and the water inlet pipe 26 and the drain pipe 27 are connected to a circulating water device. The heat exchanger includes a vertically arranged outer pipe 21, an inner pipe 22 vertically arranged in the outer pipe 21, a conduit 24 disposed on the lower side wall of the outer pipe 21, a drain pipe 28 disposed on the lower end of the outer pipe 21, and a first valve 29 disposed on the drain pipe 28. Both ends of the inner pipe 22 pass through the side wall of the outer pipe 21 and are connected to the water inlet pipe 26 and the drain pipe 27 respectively. The upper end of the outer pipe 21 is connected to the inlet pipe 23, the conduit 24 is connected to the exhaust pipe 25, and the inner wall of the outer pipe 21 has a hollow structure. Specifically, during operation, the inter-stage compressed air generated by the compressor during compression is sent into the outer pipe 21 through the inlet pipe 23, passes through the gap between the inner pipe 22 and the outer pipe 21, and enters the conduit 24 at the lower end of the outer pipe 21. Finally, it returns to the compressor through the exhaust pipe 25 for subsequent compression. During its passage through the outer pipe 21, the compressed air comes into contact with both the walls of the inner pipe 22 and the outer pipe 21. The circulating water device sends water that needs to be heated into the inner pipe 22 through the water inlet pipe 26. After being heated by the compressed air and the inner pipe 22, the water is returned to the circulating water device through the drain pipe 27. Water can also be injected into the housing 11. In this way, the heat from the outer pipe 21 can be directly transferred to the water in the housing 11, achieving cooling of the high-temperature compressed air and heat recovery. Furthermore, since the inner wall of the outer tube 21 has a hollow structure, components such as lubricating oil, water, and dust mixed in the compressed gas will liquefy and enter the hollow structure, gradually flowing down along the hollow structure of the inner wall of the outer tube 21. When a certain amount is accumulated, the mixture can be discharged by opening the first valve 29. The high-pressure gas will also assist in spraying the mixture out from the drain pipe 28. This can effectively prevent the mixture from corroding the outer tube 21 and the inner tube 22, prevent the mixture from clogging in the outer tube 21, and also purify the compressed gas to a certain extent, improving the purity of the compressed gas. It should be noted that the hollow structure of the inner wall of the outer tube 21 can be prepared by traditional methods such as electrodeposition, chemical etching, laser processing, sintering coating, and powder extrusion molding. For example, by using the electrodeposition method, an electric field can be constructed by (1) using a tubular cathode (outer tube 21, made of copper) and an internal anode. The electrolyte is driven by a pump to circulate in the tube, and the flow rate is controlled in real time by a flow meter and pump power to ensure the uniformity of the electric field distribution; (2) using an electrolyte containing copper ions (such as copper sulfate) to control the hydrogen ion concentration within the saturation concentration range and the metal cation concentration is synchronously matched.By adjusting the current density and deposition time, the porosity and pore size can be precisely controlled; (3) The deposited porous layer needs to be sintered at high temperature in a vacuum or nitrogen-hydrogen protective atmosphere to enhance the metallurgical bond with the matrix through atomic diffusion, while eliminating the internal stress of the electrodeposited layer.

[0018] In this embodiment, the drain pipe 28 extends downwards after passing through the lower end wall of the housing 11, and the first valve 29 is located below the housing 11. Specifically, since the housing 11 is filled with cold water, the first valve 29 needs to be located below the housing 11 to prevent it from being submerged in water. This allows the first valve 29 to be opened and closed manually, or it can be replaced by an automatic valve (such as a pneumatic valve, solenoid valve, etc.) to achieve periodic automatic opening and closing. Furthermore, the mixed liquid discharged from the drain pipe 28 will not enter the housing 11.

[0019] In this embodiment, the drain pipe 28 is equipped with a liquid storage box, which is located between the conduit 24 and the first valve 29. Specifically, the mixed liquid flowing down from the outer pipe 21 can be temporarily accumulated in the liquid storage box, and then discharged through the first valve 29 after a certain period of time or after accumulating to a certain amount.

[0020] In this embodiment, the outer wall of the portion of the inner tube 22 located inside the outer tube 21 has a hollow structure. Specifically, the hollow structure on the wall of the inner tube 22 is the same as the hollow structure on the wall of the outer tube 21. By increasing the area of ​​the hollow structure, not only can the heat conduction area be increased, but the flow efficiency of the liquid in the inner tube 22 and the outer tube 21 can also be improved.

[0021] In this embodiment, the thickness of the hollow structure of the outer tube 21 is 1 / 3 of the total wall thickness of the outer tube 21; the thickness of the hollow structure of the inner tube 22 is 1 / 3 of the total wall thickness of the inner tube 22. Specifically, this maintains both good heat exchange efficiency and structural strength of the outer tube 21 and the inner tube 22.

[0022] In this embodiment, the upper end of the inner tube 22 is connected to the drain pipe 27; the heat exchanger also includes a flushing pipe 210 and a second valve 211 disposed on the flushing pipe 210; one end of the flushing pipe 210 is connected to the upper side wall of the inner tube 22, and the other end is connected to the upper side wall of the outer tube 21. Specifically, after running for a certain period of time, the flushing pipe 210 can be used to flush the inner tube 22 and the outer tube 21. The detailed operation is as follows: firstly, the first valve 29 can be opened to allow the gas and the mixture to be discharged through the first valve 29, and the gas in the outer tube 21 flows downward quickly. Then, the second valve 211 is opened briefly and several times. Since the gas flow rate in the outer tube 21 is faster, some of the water in the inner tube 22 will be directly drawn into the outer tube 21 through the flushing pipe 210. Then, under the action of the high-speed flowing gas, the walls of the outer tube 21 and the inner tube 22 are flushed. The flushed liquid is discharged through the drain pipe 28. Through continuous flushing, the impurities adhering to the walls of the outer tube 21 and the inner tube 22 can be effectively washed away. During the entire flushing process, the conduit 24 can be closed (a valve can be installed on the conduit 24 and then closed) to prevent water from entering the compressor through the conduit 24 and the exhaust pipe 25.

[0023] In this embodiment, the housing 11 is a closed structure, the flushing pipe 210 passes through the upper wall of the housing 11, and the second valve 211 is located above the housing 11. Specifically, the second valve 211 is similar to the first valve 29 and can be operated manually or by using an automated valve.

[0024] In this embodiment, a pair of circulation pipes 12 are connected to the side wall of the tank 11, and both circulation pipes 12 are connected to the water circulation device. Specifically, since the heat from the outer pipe 21 is directly transferred to the water in the tank 11, the water in the tank 11 will also be heated, so circulation pipes 12 are also needed to make the water in the tank 11 flow.

[0025] In this embodiment, multiple heat exchange components 20 are provided, and the multiple heat exchange components 20 are evenly distributed in the horizontal direction. Specifically, one inter-stage compressed air can be connected to one inlet pipe 23, or one inter-stage air can be connected to multiple inlet pipes 23, depending on the air pressure and temperature.

[0026] In summary, the gas compressor inter-stage waste heat recovery system of this embodiment, during use, sends the inter-stage compressed gas generated by the compressor during compression into the outer pipe 21 through the inlet pipe 23, passes through the gap between the inner pipe 22 and the outer pipe 21, and enters the conduit 24 at the lower end of the outer pipe 21. Finally, it returns to the compressor through the exhaust pipe 25 for subsequent compression. During the process of the compressed gas in the outer pipe 21, it simultaneously contacts the walls of the inner pipe 22 and the outer pipe 21. The circulating water device sends water that needs to be heated into the inner pipe 22 through the water inlet pipe 26. After being heated by the compressed gas and the inner pipe 22, the water is returned to the circulating water device through the drain pipe 27. Water can also be injected into the housing 11. In this way, the heat of the outer pipe 21 can be directly transferred to the water in the housing 11, realizing the cooling of the high-temperature compressed gas and the recovery and utilization of heat. Furthermore, since the inner wall of the outer tube 21 has a hollow structure, components such as lubricating oil, water, and dust mixed in the compressed gas will liquefy and enter the hollow structure, gradually flowing down along the hollow structure of the inner wall of the outer tube 21. When a certain amount is accumulated, the mixture can be discharged by opening the first valve 29. The high-pressure gas will also assist in spraying the mixture out from the drain pipe 28. This can effectively prevent the mixture from corroding the outer tube 21 and the inner tube 22, prevent the mixture from clogging in the outer tube 21, and also purify the compressed gas to a certain extent, improving the purity of the compressed gas.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waste heat recovery system for inter-stage gas compressors, characterized in that: It includes a housing (11) and a heat exchange assembly (20) disposed in the housing (11); The heat exchange assembly (20) includes multiple vertically arranged heat exchangers, an air inlet pipe (23), an exhaust pipe (25), a water inlet pipe (26), and a drain pipe (27); the air inlet pipe (23) and the exhaust pipe (25) are connected to the compressor, and the water inlet pipe (26) and the drain pipe (27) are connected to the circulating water device; The heat exchanger includes a vertically arranged outer tube (21), an inner tube (22) vertically arranged in the outer tube (21), a guide tube (24) arranged on the lower side wall of the outer tube (21), a drain pipe (28) arranged at the lower end of the outer tube (21), and a first valve (29) arranged on the drain pipe (28); both ends of the inner tube (22) pass through the side wall of the outer tube (21) and are connected to the water inlet pipe (26) and the drain pipe (27) respectively; the upper end of the outer tube (21) is connected to the air inlet pipe (23), the guide tube (24) is connected to the exhaust pipe (25), and the inner wall of the outer tube (21) has a hollow structure.

2. The gas compressor inter-stage waste heat utilization system according to claim 1, characterized in that: The drain pipe (28) passes through the lower end wall of the box (11) and extends downward, and the first valve (29) is located below the box (11).

3. The gas compressor inter-stage waste heat utilization system according to claim 1, characterized in that: The drain pipe (28) is provided with a liquid storage box, which is located between the conduit (24) and the first valve (29).

4. The gas compressor inter-stage waste heat utilization system according to claim 1, characterized in that: The outer wall of the portion of the inner tube (22) located inside the outer tube (21) has a hollow structure.

5. The gas compressor inter-stage waste heat utilization system according to claim 4, characterized in that: The thickness of the hollow structure of the outer tube (21) is 1 / 3 of the total wall thickness of the outer tube (21); The thickness of the hollow structure of the inner tube (22) is 1 / 3 of the total wall thickness of the inner tube (22).

6. The gas compressor inter-stage waste heat utilization system according to claim 1, characterized in that: The upper end of the inner pipe (22) is connected to the drain pipe (27); The heat exchanger also includes a flushing pipe (210) and a second valve (211) disposed on the flushing pipe (210); One end of the flushing pipe (210) is connected to the upper side wall of the inner pipe (22), and the other end is connected to the upper side wall of the outer pipe (21).

7. The gas compressor inter-stage waste heat utilization system according to claim 6, characterized in that: The box (11) is a closed structure, the flushing pipe (210) is installed through the upper wall of the box (11), and the second valve (211) is located above the box (11).

8. The gas compressor inter-stage waste heat utilization system according to claim 7, characterized in that: The side wall of the box (11) is connected to a pair of circulation pipes (12), and both of the circulation pipes (12) are connected to the circulating water device.

9. The gas compressor inter-stage waste heat utilization system according to any one of claims 1-8, characterized in that: The heat exchange components (20) are provided in multiple ways, and the multiple heat exchange components (20) are evenly distributed in the horizontal direction.

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