Multi-stage compressed air recovery system

Abstract

The invention discloses a multi-stage compressed air recovery system, and relates to the technical field of air compressors, the multi-stage compressed air recovery system comprises a heat exchanger, the heat exchanger comprises a shell, five cold flow pipe sets are arranged in the shell in parallel at equal intervals, a partition plate is arranged between every two adjacent cold flow pipe sets, and the partition plate is arranged in the shell. One end of each partition plate is provided with an opening end, and the opening ends of every two adjacent partition plates are arranged at the opposite positions. A first inflow pipe, a second inflow pipe, a third inflow pipe, a fourth inflow pipe and a fifth inflow pipe are arranged on one side of the shell, and a first drainage pipe, a second drainage pipe, a third drainage pipe, a fourth drainage pipe and a fifth drainage pipe are arranged on the other side of the shell. And various recovery modes can be switched to carry out targeted heat energy recovery.

Description

Technical Field

[0001] The invention relates to the technical field of air compressors, in particular to a multi-stage compressed air recovery system. Background Art

[0002] With the rapid development of industry, compressed air has been widely used in many fields. In many production processes, compressed air is used to drive various equipment and tools to achieve efficient production operations. However, a lot of energy consumption will be generated during the use of compressed air.

[0003] Compressed air is usually produced by air compressors, which consume a lot of electricity during operation. At the same time, when the compressed air completes its work task, if it is directly discharged into the atmosphere, it will not only cause energy waste, but also have a certain impact on the environment. Therefore, the development of compressed air recovery system has important practical significance.

[0004] At present, some compressed air recovery systems have been put into use. These systems mainly recover the pressure energy of compressed air and reuse it in other equipment or processes, thereby reducing energy consumption. However, the existing compressed air recovery system has the problem of single heat recovery function, which can only recover part of the heat energy of compressed air and cannot fully utilize all the energy contained in compressed air. This limits the energy-saving effect and application scope of compressed air recovery system to a certain extent. Summary of the invention

[0005] Based on the above problems existing in the prior art, the purpose of the embodiments of the present invention is to provide a multi-stage compressed air recovery system, which recovers heat energy in stages and can switch between multiple recovery modes for targeted heat energy recovery.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a multi-stage compressed air recovery system, comprising a heat exchanger, the heat exchanger comprising a shell, five groups of cold flow tube groups are arranged inside the shell, the five groups of cold flow tube groups are arranged in parallel and equidistantly inside the shell, partitions are arranged between adjacent cold flow tube groups, one end of the partition is provided with an open end, and the open ends of two adjacent partitions are arranged at opposite positions; One side of the shell is provided with an inlet pipe 1, an inlet pipe 2, an inlet pipe 3, an inlet pipe 4 and an inlet pipe 5, and the other side of the shell is provided with a discharge pipe 1, a discharge pipe 2, a discharge pipe 3, a discharge pipe 4 and a discharge pipe 5, and the inlet pipe 1, the inlet pipe 2, the inlet pipe 3, the inlet pipe 4 and the inlet pipe 5 are symmetrically arranged with the discharge pipe 1, the discharge pipe 2, the discharge pipe 3, the discharge pipe 4 and the discharge pipe 5 one by one; The inlet pipe 1 and the outlet pipe 1 are connected to both ends of the same group of the cold flow pipe group, the inlet pipe 2 and the outlet pipe 2 are connected to both ends of the same group of the cold flow pipe group, the inlet pipe 3 and the outlet pipe 3 are connected to both ends of the same group of the cold flow pipe group, the inlet pipe 4 and the outlet pipe 4 are connected to both ends of the same group of the cold flow pipe group, and the inlet pipe 5 and the outlet pipe 5 are connected to both ends of the same group of the cold flow pipe group.

[0007] Furthermore, it comprises a rectifying assembly, wherein the rectifying assembly comprises a plurality of rectifying plates, a plurality of rectifying holes are arranged in an array on the rectifying plates, and the plurality of rectifying plates are stacked and arranged in a manner corresponding to the rectifying holes; An end of the shell close to the inlet pipe 5 is provided with an open end, an inner boss is provided inside the open end of the shell, and the rectifying assembly is arranged in the open end of the shell and abuts against the inner boss.

[0008] Furthermore, a positioning boss is provided on the inner boss, a positioning groove is provided at the edge of the rectifying piece, and the rectifying assembly is arranged on the inner boss in a manner that the positioning groove and the positioning boss are embedded with each other.

[0009] Furthermore, it comprises a cover plate, which covers the open end of the shell, the cover plate is provided with a heat flow inlet, the end of the shell away from the cover plate is set as a closed end, and the closed end of the shell is provided with a heat flow outlet.

[0010] Furthermore, a pressing frame is provided on the end surface of the cover plate, and the pressing frame abuts against the end surface of the rectifying assembly away from the inner boss.

[0011] Furthermore, each of the inlet pipe 1, the inlet pipe 2, the inlet pipe 3, the inlet pipe 4 and the inlet pipe 5 is connected to a throttle valve 1, and each of the discharge pipe 1, the discharge pipe 2, the discharge pipe 3, the discharge pipe 4 and the discharge pipe 5 is connected to a throttle valve 2.

[0012] Furthermore, a throttle valve three is connected between the discharge pipe one and the discharge pipe two, and a throttle valve four is connected between the inlet pipe two and the inlet pipe three.

[0013] Furthermore, a throttle valve five is connected between the discharge pipe three and the discharge pipe four, and a throttle valve six is ​​connected between the inlet pipe four and the inlet pipe five.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. When the multi-stage compressed air recovery system is actually used, the inlet pipe 2 is connected to the compressed air in a high-temperature state, and the cold fluid is connected to the heat exchanger from the inlet pipe 1, the inlet pipe 2, the inlet pipe 3, the inlet pipe 4 and the inlet pipe 5 respectively. The hot fluid, that is, the compressed air in a high-temperature state, is connected to the heat exchanger from the hot flow inlet, passes through the outside of the five groups of cold flow pipes inside the shell, heats the cold fluid in the five groups of cold flow pipes, and completes the heat exchange; 2. The added baffles force the hot fluid to flow in the shell in a step-by-step manner, extending the time the hot fluid flows outside each group of cold flow tubes. The cold fluid in the cold flow tube group is heated for a long time and can absorb more heat, thereby improving the efficiency of heat exchange. 3. Under this heat exchange mode, when the hot fluid exchanges heat with the five groups of cold flow tubes from top to bottom, the heat contained in it will also decrease step by step. Therefore, the heat absorbed by the cold fluid in the five groups of cold flow tubes is not the same. The top cold flow tube group absorbs the most heat, and the heat absorbed by the lower cold flow tube groups decreases one by one. Therefore, when the cold fluid is discharged, it can be reused in different ways due to the different heat contained in it. That is, after the cold fluid completes the heat exchange through the heat exchanger, it generates five fluids with different heat contents. When it is reused for the second time, one of the most suitable fluids can be directly selected for adaptation according to the needs of the application environment, which improves the convenience and extensiveness of the reuse of the fluid after heat exchange; 4. By adding a rectifier component, when the hot fluid enters the shell from the hot flow inlet, it will first be rectified and screened by the rectifier component, that is, multiple layers of rectifier sheets are stacked on each other, and the rectifier holes on them are aligned to form a number of rectifier channels of the same size and neatly arranged. When the hot fluid flows through the rectifier channel, it can be converted from the originally turbulent rectifier into a number of beams with balanced states. When the cold flow tube group in the shell is then exchanged for heat, the balanced hot fluid can evenly transfer its own heat to the cold fluid in the cold flow tube group, so that the cold fluid is heated evenly and the heating efficiency is higher; 5. By adjusting the throttle valve 1 at the inlet pipe 1, the inlet pipe 2, the inlet pipe 3, the inlet pipe 4 and the inlet pipe 5, the flow rate of the cold fluid connected to the heat exchanger can be changed to achieve the heat exchange effect control function; 6. By using throttle valve 1, throttle valve 2, throttle valve 3 and throttle valve 4 in combination, the multi-stage compressed air recovery system has four different heat exchange modes. The multiple heat exchange modes can generate eight fluids with different heat contents. According to the needs of the application environment, one of the most suitable fluids can be directly selected for adaptation and use, which improves the convenience and extensiveness of the reuse of the fluid after heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] In the figure: Figure 1 It is a schematic plan view of the multi-stage compressed air recovery system of the present invention; Figure 2 yes Figure 1 A three-dimensional schematic diagram of some structures in; Figure 3 yes Figure 1 Exploded schematic diagram of some structures in; Figure 4 yes Figure 1 A cross-sectional view of a heat exchanger in FIG. Figure 5 yes Figure 1 A three-dimensional schematic diagram of the cover plate in FIG. Figure 6 yes Figure 1 An exploded schematic diagram of the rectifier assembly in FIG. In the figure: 1. Heat exchanger; 11. Shell; 111, hot flow outlet; 112, inner boss; 113, cold flow pipe group; 114, partition; 1121, positioning boss; 121, inlet pipe one; 122, inlet pipe two; 123, inlet pipe three; 124, inlet pipe four; 125, inlet pipe five; 131, drainage pipe 1; 132, drainage pipe 2; 133, drainage pipe 3; 134, drainage pipe 4; 135, drainage pipe 5; 2. Cover plate; 21. Press frame; 22. Heat flow inlet; 3. Rectification components; 31. Rectifier; 3101. rectifier hole; 3102. positioning groove. DETAILED DESCRIPTION

[0017] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0018] See also Figure 1-6 The present invention provides a technical solution: a multi-stage compressed air recovery system, including a heat exchanger 1, a cover plate 2 and a rectifier assembly 3.

[0019] The heat exchanger 1 includes a shell 11, and five groups of cold flow tube groups 113 are arranged inside the shell 11. The five groups of cold flow tube groups 113 are equidistant and parallel inside the shell 11, and partitions 114 are arranged between adjacent cold flow tube groups 113. One end of the partition 114 is provided with an open end, and the open ends of two adjacent partitions 114 are arranged at opposite positions.

[0020] One side of the shell 11 is provided with an inlet pipe 121, an inlet pipe 2 122, an inlet pipe 3 123, an inlet pipe 4 124 and an inlet pipe 5 125, and the other side of the shell 11 is provided with a discharge pipe 131, a discharge pipe 2 132, a discharge pipe 3 133, a discharge pipe 4 134 and a discharge pipe 5 135, and the inlet pipe 1 121, the inlet pipe 2 122, the inlet pipe 3 123, the inlet pipe 4 124 and the inlet pipe 5 125 are symmetrically arranged one by one with the discharge pipe 1 131, the discharge pipe 2 132, the discharge pipe 3 133, the discharge pipe 4 134 and the discharge pipe 5 135.

[0021] The inlet pipe 121 and the outlet pipe 1 131 are connected to both ends of the same group of cold flow pipe group 113, the inlet pipe 122 and the outlet pipe 132 are connected to both ends of the same group of cold flow pipe group 113, the inlet pipe 123 and the outlet pipe 133 are connected to both ends of the same group of cold flow pipe group 113, the inlet pipe 124 and the outlet pipe 134 are connected to both ends of the same group of cold flow pipe group 113, and the inlet pipe 125 and the outlet pipe 135 are connected to both ends of the same group of cold flow pipe group 113.

[0022] A throttle valve one is connected to the inlet pipe 121, the inlet pipe 2 122, the inlet pipe 3 123, the inlet pipe 4 124 and the inlet pipe 5 125; a throttle valve two is connected to the discharge pipe 1 131, the discharge pipe 2 132, the discharge pipe 3 133, the discharge pipe 4 134 and the discharge pipe 5 135; a throttle valve three is connected between the discharge pipe 1 131 and the discharge pipe 2 132; a throttle valve four is connected between the inlet pipe 2 122 and the inlet pipe 3 123; a throttle valve five is connected between the discharge pipe 3 133 and the discharge pipe 4 134; a throttle valve six is ​​connected between the inlet pipe 4 124 and the inlet pipe 5 125.

[0023] The cover plate 2 covers the open end of the shell 11 , a heat flow inlet 22 is provided on the cover plate 2 , the end of the shell 11 away from the cover plate 2 is set as a closed end, a heat flow outlet 111 is provided at the closed end of the shell 11 , and a pressing frame 21 is provided on the end surface of the cover plate 2 .

[0024] The rectifying assembly 3 includes a plurality of rectifying pieces 31 , on which a plurality of rectifying holes 3101 are arranged in an array, and the plurality of rectifying pieces 31 are stacked and arranged in a manner corresponding to the rectifying holes 3101 .

[0025] An end of the shell 11 close to the inlet pipe 5 125 is provided with an open end, an inner boss 112 is provided inside the open end of the shell 11 , and the rectifying assembly 3 is arranged in the open end of the shell 11 and abuts against the inner boss 112 .

[0026] A positioning boss 1121 is provided on the inner boss 112 , a positioning groove 3102 is provided at the edge of the rectifying piece 31 , and the rectifying assembly 3 is arranged on the inner boss 112 in a manner that the positioning groove 3102 and the positioning boss 1121 are engaged with each other.

[0027] The pressing frame 21 abuts against the end surface of the rectifying assembly 3 away from the inner boss 112 .

[0028] When the multi-stage compressed air recovery system is actually used, the inlet pipe 2 122 is connected to the compressed air in a high-temperature state, and the cold fluid is connected to the heat exchanger 1 from the inlet pipe 1 121, the inlet pipe 2 122, the inlet pipe 3 123, the inlet pipe 4 124 and the inlet pipe 5 125 respectively.

[0029] That is, the cold fluid can be divided into five streams from bottom to top. The first stream at the bottom enters the cold flow tube group 113 connected to it from the inlet pipe 121, and then is discharged from the discharge pipe 131. The second stream enters the cold flow tube group 113 connected to it from the inlet pipe 2 122, and then is discharged from the discharge pipe 2 132. The third stream enters the cold flow tube group 113 connected to it from the inlet pipe 3 123, and then is discharged from the discharge pipe 3 133. The fourth stream enters the cold flow tube group 113 connected to it from the inlet pipe 4 124, and then is discharged from the discharge pipe 4 134. The fifth stream enters the cold flow tube group 113 connected to it from the inlet pipe 5 125, and then is discharged from the discharge pipe 5 135.

[0030] The hot fluid, i.e., compressed air in a high-temperature state, enters the heat exchanger 1 from the hot flow inlet 22, passes through the outside of the five cold flow tube groups 113 inside the shell 11, heats the cold fluid in the five cold flow tube groups 113, and completes the heat exchange.

[0031] The added partition 114 forces the hot fluid to flow in the shell 11 in a step-by-step manner, thereby extending the time the hot fluid flows outside each group of cold flow tube groups 113. The cold fluid in the cold flow tube groups 113 is heated for a long time and can absorb more heat, thereby improving the efficiency of heat exchange.

[0032] Under this heat exchange mode, when the hot fluid exchanges heat with the five groups of cold flow tube groups 113 from top to bottom, the heat contained in the hot fluid will also decrease step by step. Therefore, the heat absorbed by the cold fluid in the five groups of cold flow tube groups 113 is not the same. The top cold flow tube group 113 absorbs the most heat, and the cold flow tube groups 113 below it decrease one by one. Therefore, when the cold fluid is discharged, it can be reused in different ways due to the different heat contents. That is, after the cold fluid completes heat exchange through the heat exchanger 1, five fluids with different heat contents are generated. When they are reused for the second time, one of the most suitable fluids can be directly selected for adaptation according to the needs of the application environment, which improves the convenience and extensiveness of reuse of the fluid after heat exchange.

[0033] By adding a rectifying component 3, when the hot fluid enters the shell 11 from the hot flow inlet 22, it will first be rectified and screened by the rectifying component 3, that is, multiple layers of rectifying sheets 31 are stacked on each other, and the rectifying holes 3101 thereon are aligned to form a number of rectifying channels of the same size and neatly arranged. When the hot fluid flows through the rectifying channels, it can be converted from the originally disordered rectification into a number of beams with balanced states. Then, when heat is exchanged with the cold flow tube group 113 in the shell 11, the hot fluid with balanced state can evenly transfer its own heat to the cold fluid in the cold flow tube group 113, so that the cold fluid is heated evenly and the heating efficiency is higher.

[0034] In addition, by adjusting the throttle valve 1 at the inlet pipe 1 121, the inlet pipe 2 122, the inlet pipe 3 123, the inlet pipe 4 124 and the inlet pipe 5 125, the flow rate of the cold fluid connected to the heat exchanger 1 can be changed to achieve the heat exchange effect control function.

[0035] When using throttle valve 1, throttle valve 2, throttle valve 3 and throttle valve 4, there are four different heat exchange modes in the multi-stage compressed air recovery system: The first heat exchange method is to connect the cold fluid from the inlet pipe 121, the inlet pipe 2 122, the inlet pipe 3 123, the inlet pipe 4 124 and the inlet pipe 5 125 to the heat exchanger 1 one by one for staged heat exchange; The second heat exchange method is to control and open the throttle valve 1 at the inlet pipe 121, close the throttle valve 2 at the discharge pipe 131 and the discharge pipe 2 132, open the throttle valve 3 between the discharge pipe 1 131 and the discharge pipe 2 132, close the throttle valve 1 between the inlet pipe 2 122 and the inlet pipe 3 123, open the throttle valve 4 between the inlet pipe 2 122 and the inlet pipe 3 123, open the throttle valve 2 at the discharge pipe 3 133, close the throttle valve 3 between the discharge pipe 3 133 and the discharge pipe 4 134, and connect the cold fluid from the inlet pipe 121 to the heat exchanger 1. The cold flow tube group 113 connected to the inlet tube 121 goes to the discharge tube 1 131, then goes to the discharge tube 2 132, goes to the inlet tube 2 122 through the cold flow tube group 113 connected to the discharge tube 2 132, finally goes to the inlet tube 3 123, goes to the discharge tube 3 133 through the cold flow tube group 113 connected to the inlet tube 3 123, and finally is discharged from the discharge tube 3 133, that is, the cold fluid will gradually pass through the three cold flow tube groups 113 at the bottom, and is discharged after three heat exchanges. The heat content of the fluid finally heated in this way is different from the heat content of the five fluids generated in the first way. The third heat exchange method is similar to the third method. The throttle valve 4 between the inlet pipe 2 122 and the inlet pipe 3 123 and the throttle valve 1 on the lower inlet pipe 121, the throttle valve 1 on the inlet pipe 2 122, the throttle valve 2 on the discharge pipe 1 131 and the discharge pipe 2 132, and the throttle valve 3 between the discharge pipe 1 131 and the discharge pipe 2 132 are closed. Then, the throttle valve 1 on the inlet pipe 3 123 is opened, the throttle valve 2 on the discharge pipe 3 133 and the discharge pipe 4 134 is closed, and the throttle valve 3 between the two is opened, and the throttle valve 1 on the inlet pipe 4 124 and the inlet pipe 5 125 is closed and the throttle valve 1 between the two is opened. The throttle valve 4 connects the cold fluid from the inlet pipe 3 123, passes through the cold flow pipe group 113 connected to the inlet pipe 3 123 to the discharge pipe 3 133, then enters the discharge pipe 4 134, passes through the cold flow pipe group 113 connected to the discharge pipe 4 134 to the inlet pipe 4 124, finally enters the inlet pipe 5 125, passes through the cold flow pipe group 113 connected to the inlet pipe 5 125 to the discharge pipe 5 135, and is discharged from the discharge pipe 5 135. Similar to the second heat exchange method, the heat contained in the fluid finally heated in this method is different from the heat contained in the six fluids generated by the first and second methods; The fourth heat exchange method is to close all throttle valves 2, open all throttle valves 3, close all throttle valves 1 except the throttle valve 1 at the inlet pipe 121, open all throttle valves 4, connect the cold fluid from the inlet pipe 121 to the heat exchanger 1, heat it step by step in the five groups of cold flow pipes 113, and discharge it from the discharge pipe 5 135, and finally generate a fluid with heat and temperature different from those in the first three methods.

[0036] A variety of heat exchange methods can generate eight fluids with different heat contents. According to the needs of the application environment, one of the most suitable fluids can be directly selected for adaptation and use, which improves the convenience and extensiveness of reuse of the fluid after heat exchange.

[0037] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the scope of the present invention through the above description. The technical scope of this invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Multi-stage compressed air recovery system, characterized by: The heat exchanger comprises a shell, wherein five groups of cold flow tube groups are arranged inside the shell, the five groups of cold flow tube groups are arranged in parallel and equidistantly inside the shell, and partitions are arranged between adjacent cold flow tube groups, one end of the partition is provided with an open end, and the open ends of two adjacent partitions are arranged at opposite positions; One side of the shell is provided with an inlet pipe 1, an inlet pipe 2, an inlet pipe 3, an inlet pipe 4 and an inlet pipe 5, and the other side of the shell is provided with a discharge pipe 1, a discharge pipe 2, a discharge pipe 3, a discharge pipe 4 and a discharge pipe 5, and the inlet pipe 1, the inlet pipe 2, the inlet pipe 3, the inlet pipe 4 and the inlet pipe 5 are symmetrically arranged with the discharge pipe 1, the discharge pipe 2, the discharge pipe 3, the discharge pipe 4 and the discharge pipe 5 one by one; The inlet pipe 1 and the outlet pipe 1 are connected to both ends of the same group of the cold flow pipe group, the inlet pipe 2 and the outlet pipe 2 are connected to both ends of the same group of the cold flow pipe group, the inlet pipe 3 and the outlet pipe 3 are connected to both ends of the same group of the cold flow pipe group, the inlet pipe 4 and the outlet pipe 4 are connected to both ends of the same group of the cold flow pipe group, and the inlet pipe 5 and the outlet pipe 5 are connected to both ends of the same group of the cold flow pipe group.

2. The multi-stage compressed air recovery system according to claim 1, characterized in that: It includes a rectifying assembly, wherein the rectifying assembly includes a plurality of rectifying plates, a plurality of rectifying holes are arranged in an array on the rectifying plates, and the plurality of rectifying plates are stacked and arranged in a manner corresponding to the rectifying holes; An end of the shell close to the inlet pipe 5 is provided with an open end, an inner boss is provided inside the open end of the shell, and the rectifying assembly is arranged in the open end of the shell and abuts against the inner boss.

3. The multi-stage compressed air recovery system according to claim 2, characterized in that: The inner boss is provided with a positioning boss, the edge of the rectifying piece is provided with a positioning groove, and the rectifying assembly is arranged on the inner boss in a manner that the positioning groove and the positioning boss are embedded with each other.

4. The multi-stage compressed air recovery system according to claim 3, characterized in that: It comprises a cover plate, which covers the open end of the shell, a heat flow inlet is arranged on the cover plate, an end of the shell away from the cover plate is set as a closed end, and a heat flow outlet is arranged on the closed end of the shell.

5. The multi-stage compressed air recovery system according to claim 4, characterized in that: A pressing frame is provided on the end surface of the cover plate, and the pressing frame abuts against the end surface of the rectifying assembly away from the inner boss.

6. The multi-stage compressed air recovery system according to claim 5, characterized in that: The inlet pipe 1, the inlet pipe 2, the inlet pipe 3, the inlet pipe 4 and the inlet pipe 5 are each connected to a throttle valve 1, and the discharge pipe 1, the discharge pipe 2, the discharge pipe 3, the discharge pipe 4 and the discharge pipe 5 are each connected to a throttle valve 2.

7. The multi-stage compressed air recovery system according to claim 6, characterized in that: A throttle valve three is connected between the discharge pipe one and the discharge pipe two, and a throttle valve four is connected between the inlet pipe two and the inlet pipe three.

8. The multi-stage compressed air recovery system according to claim 7, characterized in that: A throttle valve five is connected between the discharge pipe three and the discharge pipe four, and a throttle valve six is ​​connected between the inlet pipe four and the inlet pipe five.

Images