Air pre-cooling device and air separation system

Abstract

The invention discloses an air pre-cooling device and an air separation system, a spraying mechanism is arranged in the air pre-cooling device, and the spraying mechanism is communicated with a water chilling unit through a pipeline; the air cooling tower is provided with a first air inlet and a first air outlet, and compressed air can enter from the first air inlet and flow out from the first air outlet; the spraying mechanism comprises a supporting pipe, spraying pipes, a driving part, a linkage part and a supporting shell, the multiple spraying pipes are arranged on the two sides of the supporting pipe correspondingly, one end of each spraying pipe penetrates through the supporting shell to be fixedly connected with the linkage part, and the other end of each spraying pipe is rotationally connected with the supporting pipe; the linkage piece is arranged around the outer surface of the supporting shell, and the driving piece is connected with the linkage piece. One end of the spraying pipe is rotationally connected with the supporting pipe, the other end of the spraying pipe penetrates through the supporting shell to be fixedly connected with the linkage piece, under driving of the driving piece, the linkage piece can drive the spraying pipe to rotate relative to the supporting pipe, and then the technical problems that in the prior art, a spraying mechanism in a hollow pre-cooling device is fixed, and the spraying angle cannot be adjusted are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air separation, and particularly relates to an air precooling device and an air separation system. Background Art

[0002] An air separation unit is a device that uses air as a raw material and turns air into a liquid through a method of compression cycle deep refrigeration, and then gradually separates and produces inert gases such as oxygen, nitrogen, and argon from the liquid air through rectification. The air precooling device is a component of the air separation unit and is used to preliminarily cool the air to facilitate the next step of purification to remove impurities such as moisture, carbon dioxide, and dust in the compressed air. When the air separation unit separates gases, it is necessary to reduce the compressed raw air to the designed temperature through an air precooling system.

[0003] In the prior art, the spraying mechanism provided in the air precooling device is a fixed structure, and the spraying angle cannot be adjusted. When the compressed air moves from the bottom towards the spraying mechanism, the air flow rate and the temperature at different positions are different. The fixed spraying mechanism can only move in a fixed direction and cannot adjust the spraying angle.

[0004] Therefore, the present application aims to propose a new type of air precooling device and an air separation system to solve the above problems. Summary of the Invention

[0005] The main object of the present invention is to provide an air precooling device and an air separation system, aiming to solve the technical problem that the spraying mechanism in the air precooling device in the prior art is fixed and the spraying angle cannot be adjusted.

[0006] To achieve the above-mentioned invention object, in the first aspect of the present invention, an air precooling device is proposed, which includes an air cooling tower, a chiller, and a water cooling tower. The water inlet of the chiller is connected to the first outlet of the water cooling tower through a pipeline, the water outlet of the chiller is connected to the first water inlet of the water cooling tower through a first flow path, and the water outlet of the chiller is connected to the air cooling tower through a second flow path;

[0007] A spraying mechanism is arranged in the air cooling tower, and the spraying mechanism is communicated with the chiller through a pipeline; the air cooling tower is provided with a first air inlet and a first air outlet, and compressed air can enter from the first air inlet and flow out from the first air outlet;

[0008] The spray mechanism includes: a support pipe, a spray pipe, a driving member, a linkage member, and a support shell. A plurality of the spray pipes are respectively arranged on both sides of the support pipe, and one end of the spray pipe passes through the support shell and is fixedly connected to the linkage member, while the other end is rotatably connected to the support pipe; the linkage member is arranged around the outer surface of the support shell, and the driving member is connected to the linkage member; the linkage member can drive the spray pipe to rotate relative to the support pipe under the drive of the driving member; a number of nozzles are provided on the spray pipe, and the nozzles are communicated with the support pipe through the spray pipe.

[0009] Further, a groove is provided on the outer surface of the support pipe, a through hole is provided on the support shell, one end of the spray pipe passes through the through hole and is connected to the linkage member, and the other end is connected to the support pipe through the groove. The first branch flow path and the second branch flow path are also connected to the water outlet of the chiller through a seventh branch flow path.

[0010] Further, a shunt pipe away from the main body of the support pipe is provided in the groove; when the support pipe is connected to the spray pipe through the groove, the shunt pipe is inserted into the spray pipe; the spray pipe can rotate around the shunt pipe under the drive of the linkage member. A third automatic regulating valve is provided on the seventh branch flow path.

[0011] Further, a slide bar is provided on the outer surface of the support shell. The linkage member includes a sliding portion and a transmission portion. The sliding portion is sleeved on the slide bar, and the sliding portion can slide along the slide bar under the drive of the driving member.

[0012] Further, the pipeline between the water inlet of the chiller and the first water outlet of the water cooling tower includes a first branch flow path and a second branch flow path.

[0013] Further, the first branch flow path and the second branch flow path are also connected to the water outlet of the chiller through a seventh branch flow path.

[0014] Further, a third automatic regulating valve is provided on the seventh branch flow path.

[0015] Further, a plurality of finned heat exchangers are arranged in the air cooling tower. A plurality of branch flow paths are correspondingly arranged for the second flow path, and the second flow path is respectively connected to the corresponding finned heat exchangers through the branch flow paths.

[0016] Further, a first automatic regulating valve and an electronic flowmeter are provided on the pipeline of each branch flow path, and the first automatic regulating valve and the electronic flowmeter are respectively electrically connected to the control system.

[0017] Further, the spray mechanism is arranged above a plurality of the finned heat exchangers. A liquid storage tank is arranged at the bottom of the air cooling tower, and the liquid storage tank is connected to the spray mechanism through a first variable-frequency pump and a pipeline.

[0018] Furthermore, the air cooling tower is provided with a first water outlet, and multiple groups of the finned heat exchangers are all communicated with one end of the first water outlet; the water cooling tower is provided with a second water inlet, and the other end of the first water outlet is communicated with the second water inlet through a pipeline.

[0019] Furthermore, a circulation pool is arranged between the pipelines of the first water outlet and the second water inlet.

[0020] Furthermore, the water cooling tower is also provided with a second air inlet.

[0021] Furthermore, filters, water pumps and second automatic regulating valves are arranged on both the first branch pipeline and the second branch pipeline, and the water pumps are arranged between the filters and the second automatic regulating valves.

[0022] Furthermore, a third branch pipeline and a fourth branch pipeline are arranged on the pipeline between the first water outlet and the circulation pool, a first manual regulating valve is arranged on the third branch pipeline, and a fourth automatic regulating valve is arranged on the fourth branch pipeline; a fifth branch pipeline and a sixth branch pipeline are also arranged on the pipeline between the circulation pool and the second water inlet, a fifth automatic regulating valve is arranged on the fifth branch pipeline, and a second manual regulating valve is arranged on the sixth branch pipeline.

[0023] In a second aspect of the present invention, an air separation system is further proposed, which includes the air precooling device described in any one of the above.

[0024] Beneficial effects:

[0025] Compared with the prior art, an air precooling device according to an embodiment of the present application includes an air cooling tower, a chiller, and a water cooling tower. The water inlet of the chiller 2 is connected to the first outlet of the water cooling tower through a pipeline, the water outlet of the chiller is connected to the first water inlet of the water cooling tower through a first flow path, and the water outlet of the chiller is connected to the air cooling tower through a second flow path; a spraying mechanism is arranged in the air cooling tower, and the spraying mechanism is communicated with the chiller through a pipeline; the air cooling tower is provided with a first air inlet and a first air outlet, and compressed air can enter from the first air inlet and flow out from the first air outlet; the spraying mechanism includes: a support pipe, a spraying pipe, a driving member, a linkage member, and a support shell. A plurality of the spraying pipes are respectively arranged on both sides of the support pipe, and one end of the spraying pipe passes through the support shell and is fixedly connected to the linkage member, and the other end is rotatably connected to the support pipe; the linkage member is arranged around the outer surface of the support shell, and the driving member is connected to the linkage member; the linkage member can drive the spraying pipe to rotate relative to the support pipe under the drive of the driving member; a plurality of nozzles are arranged on the spraying pipe, and the nozzles are communicated with the support pipe through the spraying pipe. This technical solution solves the technical problem in the prior art that the spraying mechanism in the air separation precooling device is fixed and the spraying angle cannot be adjusted by rotatably connecting one end of the spraying pipe to the support pipe and fixedly connecting the other end to the linkage member through the support shell, and the linkage member can drive the spraying pipe to rotate relative to the support pipe under the drive of the driving member.

[0026] Compared with the prior art, an air separation system according to an embodiment of the present application includes the air precooling device described in any one of the above. It can be understood that the air separation system of the present invention application may include the above-mentioned spraying mechanism, and the air separation system of the present application may include all the technical features and technical effects of the above-mentioned air precooling device, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of an air precooling device in an embodiment of the present invention;

[0028] Figure 2 is a three-dimensional schematic diagram of a spraying mechanism in an embodiment of the present invention;

[0029] Figure 3 is Figure 2 a partially enlarged bottom view of the spraying mechanism in

[0030] Figure 4 is a schematic structural diagram of a support pipe in an embodiment of the present invention.

[0031] Wherein:

[0032] 1. Air cooling tower; 10. First air inlet; 11. First air outlet; 12. Finned heat exchanger; 13. Spraying mechanism; 130. Support pipe; 1300. Groove; 1301. Support pipe body; 1302. Diverging pipe; 131. Spraying pipe; 1310. Nozzle; 1311. Blade; 132. Linkage member; 133. Support shell; 1330. Through hole; 1331. Slide bar; 1320. Sliding part; 1321. Transmission part; 1322. Fixing member; 14. Liquid storage tank; 15. First water outlet; 150. Circulation tank; 151. First manual regulating valve; 152. Fourth automatic regulating valve;

[0033] 2. Chiller; 20. First branch flow path; 200. Filter; 201. Water pump; 202. Second automatic regulating valve; 21. Second branch flow path; 210. Third automatic regulating valve; 211. Seventh branch flow path; 22. First flow path; 23. Second flow path; 230. First automatic regulating valve; 231. Electronic flowmeter;

[0034] 3. Water cooling tower; 30. First outlet; 31. First water inlet; 32. Second water inlet; 33. Second air inlet; 320. Second manual regulating valve; 321. Fifth automatic regulating valve.

[0035] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed embodiments

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0040] Please refer to Figures 1 to 4 , in this embodiment, an air precooling device is provided, which includes an air cooling tower 1, a chiller 2, and a water cooling tower 3. The water inlet of the chiller 2 is connected to the first outlet 30 of the water cooling tower 3 through a pipeline, the water outlet of the chiller 2 is connected to the first water inlet 31 of the water cooling tower 3 through a first flow path 22, and the water outlet of the chiller 2 is connected to the air cooling tower 1 through a second flow path 23;

[0041] A spraying mechanism 13 is arranged in the air cooling tower 1, and the spraying mechanism 13 is communicated with the chiller 2 through a pipeline; the air cooling tower 1 is provided with a first air inlet 10 and a first air outlet 11, and compressed air can enter from the first air inlet 10 and flow out from the first air outlet 11;

[0042] The spraying mechanism 13 includes: a support pipe 130, a spraying pipe 131, a driving member, a linkage member 132, and a support shell 133. A plurality of spraying pipes 131 are respectively arranged on both sides of the support pipe 130, and one end of the spraying pipe 131 passes through the support shell 133 and is fixedly connected to the linkage member 132, and the other end is rotatably connected to the support pipe 130; the linkage member 132 is arranged around the outer surface of the support shell 133, and the driving member is connected to the linkage member 132; the linkage member 132 can drive the spraying pipe 131 to rotate relative to the support pipe 130 under the drive of the driving member; the spraying pipe 131 is provided with a plurality of nozzles 1310, and the nozzles 1310 are communicated with the support pipe 130 through the spraying pipe 131.

[0043] In this embodiment, the air pre-cooling device is used to cool hot air. The compressed air compressed by the air compressor, which is hot air, can enter from the first air inlet 10 of the air cooling tower 1, exchange heat with the chilled water, and the air after heat exchange flows out from the first air outlet 11 of the air cooling tower 1. It should be noted that the chilled water refers to the water flowing out from the water outlet of the chiller 2. Specifically, when the air pre-cooling device is started, the external water source can enter from the top of the water cooling tower 3 and flow out from the first outlet 30 at the bottom of the cooling tower. The water flowing out then passes through the pipeline between the water inlet of the chiller 2 and the first outlet of the water cooling tower, enters the chiller 2 through the water inlet of the chiller 2 for cooling, and the chilled water after cooling flows out from the water outlet of the chiller 2. Part of it, after passing through the first flow path 22, flows into the water cooling tower 3 through the first water inlet 31 of the water cooling tower 3, and together with the reflux nitrogen from the cold box, cools the water flowing into the water cooling tower 3 from the top, reducing the water temperature flowing into the chiller 2 from the water cooling tower 3 subsequently. Another part enters the air cooling tower 1 through the second flow path 23 and exchanges heat with the air.

[0044] In the above embodiment, the present application does not limit the specific installation positions of the first air inlet 10 and the first air outlet 11 of the air cooling tower, and they can be set according to actual design requirements. Exemplarily, the first air inlet 10 can be set at a position between the bottom and the middle of the air cooling tower 1, and the first air outlet 11 can be set at the top of the air cooling tower 1, and the hot air can flow out from the first air inlet 10 from bottom to top at the position of the first air outlet 11; the first air inlet 10 can also be set at the top of the air cooling tower 1, and the hot air is led to the bottom through a pipeline, the first air outlet 10 is set at the top, and the hot air flows out from the pipe orifice at the bottom from bottom to top at the position of the first air outlet 11.

[0045] In the above embodiment, the support pipe 130 is connected to the supply pipeline of the chilled water and is used to support the spray pipe 131. The nozzle 1310 is used to spray the chilled water. A second variable-frequency pump and a seventh automatic regulating valve are also provided on the supply pipeline. The seventh automatic regulating valve is used to cooperate with the electronic flowmeter 231, the temperature sensor, the first variable-frequency pump and the second variable-frequency pump to control the flow rate of the chilled water. Specifically, the temperature sensor monitors the temperature of the air in real time, the electronic flowmeter 231 monitors the flow rate of the chilled water in the supply pipeline in real time, the control system obtains the temperature data and the flow rate data, controls the opening and closing size of the seventh automatic regulating valve to reduce the flow rate of the chilled water, and at the same time controls the frequencies of the first variable-frequency pump and the second variable-frequency pump to decrease, realizing the adjustable power consumption of the first variable-frequency pump and the second variable-frequency pump and the adjustable water flow rate.

[0046] In the above embodiments, the driving member can provide a driving force for driving the linkage member 132. The present application does not specifically limit the driving member. Specifically, it can be a cylinder or a motor. In the above spray mechanism, one end of the spray pipe is rotatably connected to the support pipe, and the other end passes through the support shell 133 and is fixedly connected to the linkage member 132. Driven by the driving member, the linkage member 132 can drive the spray pipe 131 to rotate relative to the support pipe 130, thereby solving the technical problem in the prior art that the spray mechanism 13 in the air separation precooling device is fixed and the spray angle cannot be adjusted.

[0047] Please refer to Figures 1 to 4 , a groove 1300 is provided on the outer surface of the support pipe 130, a through hole 1330 is provided on the support shell 133, one end of the spray pipe 131 passes through the through hole 1330 and is connected to the linkage member, and the other end is connected to the support pipe through the groove 1300.

[0048] In this embodiment, the groove 1300 is connected to the spray pipe 131 for supporting the spray pipe 131. One end of the spray pipe 131 is inserted into the groove 1300 so that the spray pipe 131 can rotate relative to the groove 1300. The through hole is used to support the spray pipe 131. The other end of the spray pipe 131 passes through the through hole 1330 and is connected to the linkage member 132. The linkage member 132 can drive the spray pipe 131 to rotate relative to the through hole 1330 under the drive of the driving member. It can be understood that small holes are provided at the bottom of the groove 1300. When the spray pipe 131 is inserted into the groove 1300, the spray pipe 131 communicates with the support pipe 130 through the small holes, so that the chilled water in the support pipe 130 can flow into the spray pipe 131 through the small holes.

[0049] Please refer to Figures 1 to 4 , a flow dividing pipe 1302 away from the support pipe main body 1301 is provided in the groove 1300; when the support pipe 130 is connected to the spray pipe 131 through the groove 1300, the flow dividing pipe 1302 is inserted into the spray pipe 131; the spray pipe 131 can rotate around the flow dividing pipe 1302 under the drive of the linkage member.

[0050] It should be noted that since the groove 1300 is directly connected to the spray pipe 131 and the spray pipe 131 can rotate in the groove 1300, water will leak from the edge of the groove 1300. To a certain extent, the leaked water can also play a role in spraying. However, if too much water leaks from the groove 1300, it will affect the water volume at the nozzle 1310.

[0051] In order to reduce the water leakage problem at the groove 1300, in this embodiment, a shunt pipe 1302 away from the support pipe main body 1301 is arranged in the groove. The small hole at the bottom of the groove 1300 is the port at one end of the shunt pipe 133. The shunt pipe 1302 is inserted into the spray pipe, which can divert the water flow in the support pipe 130 into the spray pipe 131, and can reduce the water leakage amount at the edge of the groove 1300.

[0052] Please refer to Figures 1 to 4 , a sliding rod 1331 is arranged on the outer surface of the support shell 133. The linkage member includes a sliding part 1320 and a transmission part 1321. The sliding part 1320 is sleeved on the sliding rod 1331. The sliding part 1320 can slide along the sliding rod 1331 under the drive of the driving member.

[0053] In the above embodiment, as Figure 2 shown, the linkage member 132 includes a sliding part 1320 and a transmission part 1321. The sliding part 1320 is a sliding ring sleeved on the sliding rod 1331. The sliding ring can slide on the sliding rod 1331 under the drive of the driving member to drive the transmission member to move. The transmission member is two hinged transmission rods, which are hereinafter referred to as the first transmission rod and the second transmission rod for easy distinction. A hole is arranged on the fixing member 1322. After the second transmission rod passes through the hole, a stop block is installed on the part passing through the hole by a bolt. The stop block can prevent the second transmission rod from being pulled out of the hole, and is used to fix the second transmission rod on the support shell 133 to prevent the second transmission from falling off the support shell 133. It can be understood that when the second transmission rod rotates, the stop block also rotates.

[0054] In the above embodiment, one end of the spray pipe 131 passes through the through hole 1330 and is connected to the second transmission rod, and the other end is connected to the support pipe 130 through the groove 1300, so that the spray pipe 131 can rotate together under the rotation of the second transmission rod to adjust the spray angle. The adjacent second transmission rods are connected by the first transmission rod to realize the linkage of multiple second transmission rods. The second transmission rods at the head and tail positions are connected to the sliding ring through the first transmission rod to realize the transmission of power.

[0055] Please refer to Figures 1 to 4 , the pipeline between the water inlet of the chiller 2 and the first water outlet of the water cooling tower includes a first branch path 20 and a second branch path 21.

[0056] In the above embodiment, the water inlet of the chiller 2 is connected to the first outlet 30 of the water cooling tower 3 through the first branch path 20 and the second branch path 21 respectively. The second branch path 21 is used as a standby flow path. When the first branch path 20 is interrupted due to a fault, it is automatically switched to the second branch path 21, so as to ensure the normal operation of the device. The entire air separation precooling device is relatively stable and will not cause the entire air precooling device to fail to operate due to the interruption of the first branch path 20.

[0057] Please continue to refer to Figures 1 to 4 In one embodiment, the first branch flow path 20 and the second branch flow path 21 are also connected to the water outlet of the chiller 2 through a seventh branch flow path 211. A third automatic regulating valve 210 is provided on the seventh branch flow path 211.

[0058] It should be noted that since the chiller 2 can only achieve continuous cooling and does not have the function of warming up, when warming up is required, such as when the temperature of the hot air entering the air cooling tower 1 changes or the temperature of the air exiting the air cooling tower 1 needs to be adjusted, and at this time the temperature of the chilled water needs to be increased on the original basis. In the prior art, the chilled water flowing out of the chiller 2 can only be re-circulated back into the water cooling tower 3 through a circulation loop to re-adjust the water temperature, and then the corresponding adjustment is achieved through the chiller 2. This method increases the overall energy consumption and is not conducive to energy conservation.

[0059] In this embodiment, one end of the seventh branch flow path 211 is provided on the pipeline where the first branch flow path 20 and the second branch flow path 21 are connected to one end of the water inlet of the chiller 2, and the other end is provided on the pipeline connected to the water outlet of the chiller 2, which can enable the chilled water flowing through the first branch flow path 20 or the second branch flow path 21 to be diverted through the seventh branch flow path 211. Specifically, the chilled water flows out from the first outlet 30 at the bottom of the cooling tower, and the flowing water then passes through the first branch flow path 20 or the second branch flow path 21. A part directly enters the chiller 2 through the water inlet of the chiller 2 for cooling, and the chilled water after cooling flows out from the water outlet of the chiller 2; another part is joined with the chilled water flowing out from the water outlet of the chiller 2 through the seventh branch flow path 211. After joining, since there is a temperature difference between the chilled water passing through the seventh branch flow path 211 and the chilled water flowing out from the water outlet of the chiller 2, after the two are joined, the chilled water flowing out from the water outlet of the chiller 2 is warmed up.

[0060] In the above embodiment, the third automatic regulating valve 210 is used to automatically regulate the opening and closing of the seventh branch flow path 211, and under the control of the control system, it can cooperate with the electronic flowmeter 231 provided on the second flow path 23 to adjust the opening degree of the valve, and further adjust the flow rate of the chilled water passing through the seventh branch, so as to achieve the function of adjusting the temperature. It can be understood that the heat exchange between the air in the air cooling tower 1 and the chilled water determines whether the chilled water flowing out from the water outlet of the chiller 2 needs to be warmed up; when warming up is not required, the third automatic regulating valve 210 is in a closed state, and when warming up is required, the third automatic regulating valve 210 automatically opens, which is conducive to the energy conservation of the air pre-cooling device.

[0061] Please continue to refer to Figure 1, in one embodiment, a plurality of finned heat exchangers 12 are arranged in the air cooling tower 1, and a plurality of branch flow paths are correspondingly arranged in the second flow path 23, and the second flow path 23 is respectively connected to the corresponding finned heat exchanger 12 through the branch flow paths.

[0062] It should be noted that the cooling mode of the hot air in the traditional air cooling tower 1 is a step-by-step cooling mode. The implementation method is usually that the middle part of the air cooling tower 1 is directly connected to the water cooling tower 3 through a pipeline, and a water pump is arranged on the pipeline directly connecting the middle part of the air cooling tower 1 to the water cooling tower 3. This water pump is used to extract the normal temperature water from the water cooling tower to pre-cool the hot air in the air cooling tower 1. A single heat exchanger is arranged at the upper part of the air cooling tower. This heat exchanger is connected to the chiller through a pipeline. The pre-cooled and heat-exchanged hot air exchanges heat with the single heat exchanger. Finally, after adjusting the temperature of the hot air, it flows out from the first air outlet 11. Exemplarily, when it is necessary to reduce the temperature of the hot air at 80 degrees Celsius to the range of 8 - 10 degrees, the existing above technical solution is to introduce the normal temperature water through the pipeline directly connecting the middle part of the air cooling tower 1 to the water cooling tower 3 to exchange heat with the hot air at 80 degrees Celsius, and then reduce the temperature of the hot air to the range of 8 - 10 degrees Celsius through a single heat exchanger. In this way, a water pump is arranged on the pipeline directly connecting the air cooling tower 1 and the water cooling tower 3, and a water pump is arranged on the pipeline connecting the single heat exchanger and the chiller 2. A total of two water pumps are required. When a standby pipeline is set, four water pumps are required. And if any one of the pipelines directly connecting the air cooling tower 1 and the water cooling tower 3 and the pipeline connecting the single heat exchanger and the chiller 2 is damaged, the entire air pre-cooling device 1 cannot normally perform its function, and the entire device is unstable.

[0063] To solve the above problems, in this embodiment, a plurality of finned heat exchangers 12 are adopted. It is not necessary to pre-heat through the normal temperature water, but the plurality of finned heat exchangers 12 exchange heat step by step. The finned heat exchanger 12 is used to enhance the heat transfer efficiency, and the fins on its surface can increase the heat exchange area. The heat exchange process between the finned heat exchanger 12 and the air is as follows. In the air cooling tower 1, the chilled water flows from top to bottom in the fins, and the air moves from bottom to top. When the air contacts the fins, the heat of the air is transferred to the chilled water through the fins to achieve the cooling of the air.

[0064] In the above embodiment, a plurality of fins are utilized. The chilled water flows inside the fins, and the hot air fluid flows outside the fins for convective heat exchange. The fins in the plurality of finned heat exchangers 12 increase the contact area between the air and the chilled water for heat exchange, realizing the reduction of the air temperature. Compared with the existing heat exchange method of a single heat exchanger, the heat exchange efficiency of the air is improved. At the same time, a plurality of finned heat exchangers 12 are arranged in the air cooling tower 1. When one of the heat exchangers is damaged and cannot pass the chilled water, the remaining finned heat exchangers 12 can still work normally, further improving the stability of the air pre-cooling device.

[0065] In the above embodiments, since there is no need for heat exchange with normal temperature water, the pipeline for normal temperature water can be cancelled, and the use of water pumps can be reduced. It can be understood that when there is no standby pipeline on the normal temperature water pipeline, one water pump can be reduced, and when there is a standby pipeline on the normal temperature water pipeline, the use of two water pumps can be reduced.

[0066] Please continue to refer to Figure 1 , in an embodiment, a first automatic regulating valve 230 and an electronic flowmeter 231 are arranged on the pipelines of respective branch paths, and the first automatic regulating valve 230 and the electronic flowmeter 231 are respectively electrically connected to a control system.

[0067] In this embodiment, the first automatic regulating valve 230 and the electronic flowmeter 231 are used to cooperate with a temperature sensor arranged in the air cooling tower 1 to adjust the flow rate of chilled water in each branch path. Specifically, the temperature sensor arranged in the air cooling tower 1 can detect the temperature information of the air in real time. The electronic flowmeter 231 is used to measure the flow rate of chilled water. The temperature information and the flow rate information are transmitted to the control system, and the control system controls the opening degree of the first automatic regulating valve 230 to control the flow rate of chilled water.

[0068] Please refer to Figures 1 to 4 , in an embodiment, the spraying mechanism 13 is arranged above a plurality of finned heat exchangers 12, a liquid storage tank 14 is arranged at the bottom of the air cooling tower 1, and the liquid storage tank 14 is connected to the spraying mechanism 13 through a first variable frequency pump and a pipeline.

[0069] In this embodiment, the spraying mechanism 13 is connected to a supply pipeline of chilled water. A liquid storage tank 14 is arranged at the bottom of the air cooling tower 1, and the liquid storage tank 14 is communicated with a water outlet so that the chilled water flowing out of the spraying mechanism 13 can be discharged. A circulation mechanism is arranged in the air cooling tower 1, including a first variable frequency pump. The liquid storage tank 14 is connected to the spraying mechanism 13 through the first variable frequency pump and a pipeline. Specifically, the liquid storage tank 14 is connected to the supply pipeline through the first variable frequency pump and a pipeline so that the water in the liquid storage tank 14 can be converged with the chilled water in the supply pipeline, and then the water in the liquid storage tank 14 can be recycled to reduce the overall power consumption of the air precooling device.

[0070] Please continue to refer to Figures 1 to 4 , in an embodiment, the air cooling tower 1 is provided with a first water outlet 15, and a plurality of finned heat exchangers 12 are all communicated with one end of the first water outlet ;the water cooling tower 3 is provided with a second water inlet 32, and the other end of the first water outlet 15 is connected to the second water inlet 32 through a pipeline. A circulation pool 150 is arranged between the pipelines of the first water outlet 15 and the second water inlet 32.

[0071] In this embodiment, when the air in the air cooling tower 1 exchanges heat with multiple groups of the finned heat exchangers 12, the chilled water in the finned heat exchangers 12 flows out from the first water outlet 15 from top to bottom, and after passing through the pipeline, it flows into the cooling tower through the second water inlet 32 to realize the recycling of the chilled water.

[0072] Furthermore, a circulation pool 150 is arranged between the pipeline connecting the first water outlet 15 and the second water inlet 32. The circulation pool 150 is used for cooling and filtering the chilled water flowing out from the first water outlet 15. It can be understood that when the chilled water exchanges heat with the hot air in the air cooling tower 1 through multiple groups of finned heat exchangers 12, the temperature of the chilled water rises. After passing through the circulation pool 150, the temperature can be reduced to normal temperature, and thus it is not necessary to reheat in the water cooling tower 3, which is beneficial to energy conservation. By arranging a filtering device in the circulation pool 150, the chilled water can be filtered, and particulate matter can be prevented from entering the water cooling tower.

[0073] Please continue to refer to Figures 1 to 4 In one embodiment, the water cooling tower 3 is further provided with a second air inlet 33.

[0074] In this embodiment, the second air inlet 33 is used for introducing nitrogen or waste nitrogen. Specifically, during the air precooling startup stage, there is no reflux low-temperature gas in the nitrogen production cold box. Part of the gas is extracted from the cooled air pipeline and enters the water cooling tower 3 to exchange heat with the circulating water, so as to achieve the purpose of reducing the temperature of the circulating water. After closing the cooled air pipeline, the waste nitrogen from the cold box enters the bottom of the water cooling tower 3 through the second air inlet 33. The circulating water makes countercurrent contact with the packing in the water cooling tower 3, so that the waste nitrogen is heated and humidified and then discharged into the atmosphere, thereby cooling the circulating water into chilled water.

[0075] Please continue to refer to Figures 1 to 4 In one embodiment, filters 200, water pumps 201 and second automatic regulating valves 202 are arranged on both the first branch pipeline 20 and the second branch pipeline 21. The water pumps 201 are arranged between the filters 200 and the second automatic regulating valves 202.

[0076] In this embodiment, the filters 200 are used for filtering the chilled water to prevent impurities mixed in the chilled water from flowing into the chiller 2 and / or the air cooling tower 1. The water pumps 201 are used for sucking the chilled water in the water cooling tower 3 into the chiller 2 and / or the air cooling tower 1. The second automatic regulating valves 202 are used for regulating the flow rate of the chilled water together with the electronic flowmeter 231.

[0077] In the above embodiment, the second regulating valve, the water pump 201 and the electronic flowmeter 231 cooperate with each other. Under the control of the control system, manual intervention can be reduced, and the automation degree of the valve can be improved.

[0078] Please refer to Figure 1, in one embodiment, a third branch path and a fourth branch path are provided on the pipeline between the first water outlet 15 and the circulation tank 150. A first manual regulating valve 151 is provided on the third branch path, and a fourth automatic regulating valve 152 is provided on the fourth branch path; a fifth branch path and a sixth branch path are further provided on the pipeline between the circulation tank 150 and the second water inlet 32. A fifth automatic regulating valve 321 is provided on the fifth branch path, and a second manual regulating valve 320 is provided on the sixth branch path.

[0079] In this embodiment, by providing a third branch path and a fourth branch path on the pipeline between the first water outlet 15 and the circulation tank 150; and further providing a fifth branch path and a sixth branch path on the pipeline between the circulation tank 150 and the second water inlet 32, it can prevent the entire device from malfunctioning when one of the passageways is interrupted, which is beneficial to maintaining the stability of the device.

[0080] In the above embodiment, a fifth automatic regulating valve 321 is provided on the fifth branch path, and a fourth automatic regulating valve 152 is provided on the fourth branch path, which can improve the automation degree of the device and reduce manual intervention. A first manual regulating valve 151 is provided on the third branch path, and a second manual regulating valve 320 is provided on the sixth branch path, which can set the third branch path and the sixth branch path as standby flow paths. When the fifth branch path and / or the fourth branch path is damaged, the standby branch path can be manually activated to prevent the device from being unable to operate continuously, which is beneficial to the overall maintenance of the device.

[0081] It should be noted that all of the third branch path, the fourth branch path, the fifth branch path, and the sixth branch path can also be provided with automatic regulating valves. When one of the branches needs to be repaired and disconnected, the corresponding branch path can be automatically opened, which is beneficial to the continuous operation of the air precooling device. Exemplarily, when the third branch path or the fifth branch path is disconnected, the fourth branch path or the sixth branch path is automatically opened. It can be understood that setting the third branch path and the sixth branch path as manual regulating valves to serve as standby flow paths can save the use cost of the equipment.

[0082] In one embodiment, liquid level gauges are provided in both the air cooling tower 1 and the water cooling tower 3.

[0083] In the above embodiment, the liquid level gauges are used to monitor and measure the liquid level of the chilled water in the air cooling tower 1 and the water cooling tower 3, which is beneficial to maintaining the circulation of the chilled water.

[0084] In one embodiment, the present invention application further provides an air separation system, including the air precooling device described in any one of the above. It can be understood that the air separation system of the present invention application can include the above-mentioned first branch path 20 and second branch path 21. The air separation system of the present application can include all the technical features and technical effects of the above-mentioned air precooling device, which will not be elaborated herein.

[0085] In summary, an air pre-cooling device according to an embodiment of the present application includes an air cooling tower 1, a chiller 2, and a water cooling tower 3. The water inlet of the chiller 2 is connected to the first outlet 30 of the water cooling tower 3 through a pipeline. The water outlet of the chiller 2 is connected to the first water inlet 31 of the water cooling tower 3 through a first flow path. The water outlet of the chiller 2 is connected to the air cooling tower 1 through a second flow path 23. A spraying mechanism 13 is arranged in the air cooling tower 1, and the spraying mechanism 13 is communicated with the chiller 2 through a pipeline. The air cooling tower 1 is provided with a first air inlet 10 and a first air outlet 11. Compressed air can enter from the first air inlet 10 and flow out from the first air outlet 11. The spraying mechanism 13 includes: a support pipe 130, a spraying pipe 131, a driving member, a linkage member 132, and a support shell 133. A plurality of the spraying pipes 131 are respectively arranged on both sides of the support pipe 130. One end of the spraying pipe 131 passes through the support shell 133 and is fixedly connected to the linkage member 132, and the other end is rotatably connected to the support pipe 130. The linkage member 132 is arranged around the outer surface of the support shell 133, and the driving member is connected to the linkage member 132. Driven by the driving member, the linkage member 132 can drive the spraying pipe 131 to rotate relative to the support pipe 130. A plurality of nozzles 1310 are arranged on the spraying pipe 131, and the nozzles 1310 are communicated with the support pipe 130 through the spraying pipe 131. By rotatably connecting one end of the spraying pipe 131 to the support pipe 130 and fixedly connecting the other end to the linkage member 132 through the support shell 133, the linkage member 132 can drive the spraying pipe 131 to rotate relative to the support pipe 130 under the drive of the driving member, thereby solving the technical problem in the prior art that the spraying mechanism 13 in the air separation pre-cooling device is fixed and the spraying angle cannot be adjusted.

[0086] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. An air pre-cooling device, characterized in that, Including: An air cooling tower, a chiller, and a water cooling tower. The water inlet of the chiller is connected to the first outlet of the water cooling tower through a pipeline. The water outlet of the chiller is connected to the first water inlet of the water cooling tower through a first flow path, and the water outlet of the chiller is connected to the air cooling tower through a second flow path. A spraying mechanism is arranged in the air cooling tower, and the spraying mechanism is communicated with the chiller through a pipeline. The air cooling tower is provided with a first air inlet and a first air outlet, and compressed air can enter from the first air inlet and flow out from the first air outlet. The spraying mechanism includes: a support pipe, a spraying pipe, a driving member, a linkage member, and a support shell. A plurality of the spraying pipes are respectively arranged on both sides of the support pipe, and one end of the spraying pipe passes through the support shell and is fixedly connected to the linkage member, and the other end is rotatably connected to the support pipe. The linkage member is arranged around the outer surface of the support shell, and the driving member is connected to the linkage member. The linkage member can drive the spraying pipe to rotate relative to the support pipe under the drive of the driving member. A plurality of nozzles are arranged on the spraying pipe, and the nozzles are communicated with the support pipe through the spraying pipe.

2. The air pre-cooling device according to claim 1, characterized in that, A groove is arranged on the outer surface of the support pipe, and the support shell is provided with a through hole. One end of the spraying pipe passes through the through hole and is connected to the linkage member, and the other end is connected to the support pipe through the groove.

3. The air pre-cooling device according to claim 2, characterized in that, A shunt pipe away from the main body of the support pipe is arranged in the groove. When the support pipe is connected to the spraying pipe through the groove, the shunt pipe is inserted into the spraying pipe. The spraying pipe can rotate around the shunt pipe under the drive of the linkage member.

4. The air pre-cooling device according to claim 1, wherein A sliding rod is arranged on the outer surface of the support shell. The linkage member includes a sliding part and a transmission part. The sliding part is sleeved on the sliding rod, and the sliding part can slide along the sliding rod under the drive of the driving member.

5. The air pre-cooling device according to claim 1, wherein The pipeline between the water inlet of the chiller and the first water outlet of the water cooling tower includes a first branch flow path and a second branch flow path.

6. The air pre-cooling device according to claim 5, wherein, The first branch flow path and the second branch flow path are also connected to the water outlet of the chiller through a seventh branch flow path.

7. The air pre-cooling device according to claim 6, characterized in that, A third automatic regulating valve is arranged on the seventh branch flow path.

8. The air pre-cooling device according to claim 1, wherein, A plurality of finned heat exchangers are arranged in the air cooling tower. The second flow path is correspondingly provided with a plurality of branch flow paths, and the second flow path is respectively connected to the corresponding finned heat exchangers through the branch flow paths.

9. The air pre-cooling device according to claim 8, characterized in that, A first automatic regulating valve and an electronic flowmeter are arranged on the pipeline of each branch flow path, and the first automatic regulating valve and the electronic flowmeter are respectively electrically connected to a control system.

10. The air pre-cooling device according to claim 8, characterized in that, The spraying mechanism is arranged above a plurality of the finned heat exchangers. A liquid storage pool is arranged at the bottom of the air cooling tower, and the liquid storage pool is connected to the spraying mechanism through a first variable-frequency pump and a pipeline.

11. The air pre-cooling device according to claim 10, characterized in that, The air cooling tower is provided with a first water outlet. A plurality of the finned heat exchangers are all communicated with one end of the first water outlet. The water cooling tower is provided with a second water inlet, and the other end of the first water outlet is connected to the second water inlet through a pipeline.

12. The air pre-cooling device according to claim 11, wherein, A circulation pool is arranged between the pipelines of the first water outlet and the second water inlet.

13. The air pre-cooling device according to claim 1, characterized in that, The water cooling tower is also provided with a second air inlet.

14. The air pre-cooling device according to claim 6, characterized in that, Filters, water pumps and second automatic regulating valves are provided on both the first branch pipeline and the second branch pipeline, and the water pumps are arranged between the filters and the second automatic regulating valves.

15. The air pre-cooling device according to claim 12, wherein A third branch pipeline and a fourth branch pipeline are provided on the pipeline between the first water outlet and the circulation pool. A first manual regulating valve is provided on the third branch pipeline, and a fourth automatic regulating valve is provided on the fourth branch pipeline; a fifth branch pipeline and a sixth branch pipeline are further provided on the pipeline between the circulation pool and the second water inlet. A fifth automatic regulating valve is provided on the fifth branch pipeline, and a second manual regulating valve is provided on the sixth branch pipeline.

16. An air separation system, characterized in that, It includes the air pre-cooling device according to any one of claims 1 to 15.

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