Air pre-cooling mechanism of air separation device

Abstract

The utility model relates to the technical field of air pre-cooling, and discloses an air pre-cooling mechanism of an air separation device, which comprises a pre-cooling box and filter components, the filter components are arranged on two sides of the outside of the pre-cooling box, a water pump is mounted at the top of the pre-cooling box, and the input end of the water pump is fixedly connected with a water inlet pipe. The output end of the water pump is fixedly connected with a connecting pipe, and a pre-cooling assembly is arranged in the pre-cooling box and used for cooling air. The pre-cooling assembly comprises a plurality of S-shaped condensation pipes, the S-shaped condensation pipes are arranged in the pre-cooling box, one ends of the multiple S-shaped condensation pipes are fixedly connected with a first combined pipe, and the other ends of the multiple S-shaped condensation pipes are fixedly connected with a second combined pipe. According to the utility model, the cooling liquid circularly flows through the specially designed pipeline and device to form a water curtain, and the contact area and time of the cooling liquid and the air are greatly increased and prolonged by virtue of the S-shaped condensation pipe, so that the heat exchange is more sufficient and efficient, and the air can be quickly cooled to a low-temperature state.

Description

TECHNICAL FIELD

[0001] The utility model relates to air precooling technical field especially relates to a kind of air precooling mechanism of air separation unit. BACKGROUND

[0002] In modern industrial production, air separation unit plays a vital role, it is separated into oxygen, nitrogen and various gas by air, to meet the needs of different industries to gas.And air precooling mechanism as the important component of air separation unit, its performance directly affects the operation efficiency of entire air separation unit and gas product quality. With the rapid development of industry, the processing capacity of air separation unit, energy consumption and gas purity etc. It is proposed higher and higher requirement, which also promotes air precooling mechanism to continuously improve technology and innovation.

[0003] At present, common air separation unit air precooling mechanism usually adopts indirect heat exchange cooling mode, indirect heat exchange cooling utilizes heat exchanger, and air and coolant are exchanged in the case of not directly contacting.

[0004] However, there are some obvious problems in prior art. In actual large chemical production scene, air treatment capacity is huge and gas purity requirement is extremely high. The existing precooling mechanism has the problem of insufficient cooling efficiency, and the traditional heat exchanger cannot make air and coolant fully contact due to the limitation of heat exchange area and structure, leading to insufficient heat exchange, and air is difficult to quickly drop to ideal low temperature state, which affects the subsequent gas separation efficiency of air separation unit, therefore the technical field proposes a kind of air precooling mechanism of air separation unit to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides a kind of air precooling mechanism of air separation unit, to improve the problem of low air precooling treatment efficiency of air precooling mechanism of air separation unit in prior art.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a kind of air precooling mechanism of air separation unit, including precooling tank and filter component, the filter component is arranged at the outside of precooling tank two sides, the top of precooling tank is equipped with water pump, the input end of water pump is fixedly connected with water inlet pipe, the output end of water pump is fixedly connected with adapter pipe, the inside of precooling tank is provided with precooling component, and the precooling component is used to cool air;

[0007] The precooling assembly comprises a plurality of S-shaped condensing pipes arranged in the interior of the precooling box, one end of each of the plurality of S-shaped condensing pipes is fixedly connected with a combined pipe one, the other end of each of the plurality of S-shaped condensing pipes is fixedly connected with a combined pipe two, a partition plate is fixedly connected in the interior of the precooling box, a refrigeration device is arranged on the top of the precooling box, an outlet pipe is fixedly connected to the output end of the refrigeration device, and one end of the outlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with a shower plate.

[0008] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0009] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0010] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0011] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0012] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0013] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0014] Further, one end of the combined pipe one penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with the outside of the combined pipe two.

[0015] The utility model has the advantages of the following beneficial effects:

[0016] 1、The cooling liquid circulates through the specially designed pipeline and device, forms a water curtain and relies on the S-shaped condensing pipe, greatly increases the contact area and time with air, makes heat exchange more sufficient and efficient, and can rapidly reduce air to a low temperature state.

[0017] 2. The utility model discloses, through solid filter screen and gas absorption net respectively before and after air precooling to it carry out filtration, the former intercepts small particle, the latter removes harmful gas, guarantees the clean air of entering subsequent link, meets the quality requirement, and solid filter screen adopts convenient quick -release structure, and convenient cleaning replacement improves maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 A three-dimensional view of an air precooling mechanism of an air separation device is provided for the utility model;

[0019] Fig. 2 An internal structure schematic view of a precooling box of an air precooling mechanism of an air separation device is provided for the utility model;

[0020] Fig. 3 A structure schematic view of a push plate of an air precooling mechanism of an air separation device is provided for the utility model.

[0021] LEGEND:

[0022] 1, precooling box, 2, S-shaped condenser pipe, 3, combination pipe one, 4, combination pipe two, 5, water pump, 6, water inlet pipe, 7, refrigeration device, 8, adapter pipe, 9, water outlet pipe, 10, shower plate, 11, baffle, 12, annular pipe mouth one, 13, solid filter screen, 14, elastic clamp block, 15, clamping groove, 16, annular pipe mouth two, 17, spring telescopic rod, 18, push plate, 19, annular groove, 20, gas absorption net, 21, baffle, 22, L-shaped block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] REFERENCE Figs. 1-3The utility model provides an air precooling mechanism of air separation equipment, including precooling case 1 and filter assembly, filter assembly sets up at the outside both sides of precooling case 1, is mainly used for carrying out filter operation to the air of entering and discharging precooling case 1. Precooling case 1's top is installed with water pump 5, and water pump 5's effect is to provide power for the circulation flow of coolant, and its input fixedly connected with water inlet pipe 6, and water inlet pipe 6 is used to extract coolant from combination pipe two 4 to water pump 5;The output of water pump 5 is fixedly connected with the pipe 8 of link, and the pipe 8 of link is responsible for the coolant output from water pump 5 to be delivered to refrigeration plant 7. Precooling case 1 is provided with precooling assembly inside, and precooling assembly is used to cool air. Precooling assembly includes multiple S-shaped condenser pipe 2, and S-shaped condenser pipe 2 sets up inside precooling case 1, and multiple S-shaped condenser pipe 2 can increase the contact area of coolant and air, improve cooling effect. The one end of multiple S-shaped condenser pipe 2 is fixedly connected with combination pipe one 3, and combination pipe one 3 is used to distribute coolant into each S-shaped condenser pipe 2;The other end of multiple S-shaped condenser pipe 2 is fixedly connected with combination pipe two 4, and combination pipe two 4 is responsible for the coolant that passes through S-shaped condenser pipe 2 gathers. Precooling case 1 is fixedly connected with the baffle 11 inside, and the baffle 11 divides the inside of precooling case 1 into an area for placing coolant. The top of precooling case 1 is installed with refrigeration plant 7, and refrigeration plant 7 is used to refrigerate coolant, so that it keeps low temperature state, and the output of refrigeration plant 7 is fixedly connected with water outlet pipe 9, and one end of water outlet pipe 9 penetrates the inner wall of precooling case 1 and is fixedly connected with the nozzle plate 10, and the nozzle plate 10 is used to form water curtain in the form of spraying after refrigeration. One end of combination pipe one 3 penetrates the baffle 11, so that coolant can enter combination pipe one 3 from the area surrounded by the baffle 11 and the inner wall of precooling case 1. One end of water inlet pipe 6 penetrates the inner wall of precooling case 1 and is fixedly connected with the outside of combination pipe two 4, so that coolant can be extracted from combination pipe two 4 by water pump 5 through water inlet pipe 6. One end of the pipe 8 of link is fixedly connected with the input of refrigeration plant 7, realizes the delivery of coolant from water pump 5 to refrigeration plant 7. The nozzle plate 10 is located directly above the area surrounded by the baffle 11 and the inner wall of precooling case 1, to ensure that the sprayed coolant can fall into the area.

[0025] Specifically, in the air pre-cooling link of the air separation device, first, the external normal temperature air enters the inside of the pre-cooling box 1 from the annular pipe opening 1. The annular pipe opening 1 is used as an air inlet channel, and its position and structure design can ensure that the air flows smoothly and stably into the pre-cooling box 1. At this time, in the pre-cooling box 1, the area surrounded by the partition plate 11 and the inner wall of the pre-cooling box 1 is placed with cooling liquid, which is the key medium in the entire pre-cooling process, and has good heat conduction performance, which can efficiently take away the heat in the air. When the water pump 5 is started, the water pump 5 begins to play its role as a power source. Under the strong suction of the water pump 5, the cooling liquid will enter the inside of the multiple S-shaped condensing pipes 2 from the combined pipe 1. The combined pipe 1 is designed to evenly distribute the cooling liquid to each S-shaped condensing pipe 2, ensuring that the cooling liquid can fully cover the S-shaped condensing pipe 2, thereby increasing the contact area with the surrounding air. The special shape of the multiple S-shaped condensing pipes 2 greatly increases the contact path and time of the cooling liquid with the air, making the heat exchange more sufficient. When the cooling liquid flows in the S-shaped condensing pipe 2, it will quickly absorb the heat in the surrounding air, reducing the temperature of the surrounding air. Subsequently, the cooling liquid after heat exchange has a higher temperature, which will be pumped out by the water pump 5 through the combined pipe 2 and the water inlet pipe 6. The cooling liquid extracted has a higher temperature and cannot meet the requirement of continuous cooling, so it needs to be further processed. Then, the cooling liquid is transported to the inside of the refrigeration device 7 through the connecting pipe 8 for cooling. The refrigeration device 7 uses specific refrigeration technology, such as compression refrigeration or absorption refrigeration, to release the heat of the cooling liquid, greatly reducing the temperature of the cooling liquid and restoring it to a low temperature state that can effectively cool. The temperature of the cooling liquid cooled by the refrigeration device 7 can meet the requirement of efficient cooling of air again. After that, the cooled cooling liquid is transported to the spray head plate 10 through the water outlet pipe 9 for spraying. The spray head plate 10 is distributed with numerous fine spray heads, which can uniformly disperse the cooling liquid into fine water droplets, thereby forming a water curtain of cooling liquid in the inside of the pre-cooling box 1. The formation of the water curtain greatly increases the contact area of the cooling liquid with the air, making the heat exchange between the air and the cooling liquid more sufficient and efficient. At this time, the air entering the pre-cooling box 1 will directly contact the water curtain, and in the process of contact, the heat in the air is quickly transferred to the cooling liquid, and the temperature of the air drops sharply. Moreover, the air will also contact the multiple S-shaped condensing pipes 2 cooled by the cooling liquid, and the low-temperature outer wall of the S-shaped condensing pipe 2 can continuously absorb the heat in the air, further reducing the temperature of the air, so that the air can maintain a low temperature state, and finally the air is discharged from the annular pipe opening 2 16, thereby completing the air pre-cooling process.

[0026] Reference Figs. 1-3The filter assembly comprises a solid filter screen 13 and a gas absorption screen 20, and the outer side of the pre-cooling box 1 is fixedly connected with an annular pipe opening 1, which is a channel for the external air to enter the pre-cooling box 1. The solid filter screen 13 is arranged outside the annular pipe opening 1, and is used to filter the air before it enters the pre-cooling box 1, so as to remove the fine particles in the air. The outer side of the annular pipe opening 1 is provided with two clamping grooves 15, and the outer side of the solid filter screen 13 is fixedly connected with two elastic clamping blocks 14, the outer side of the elastic clamping block 14 is clamped with the inner side of the clamping groove 15, and the clamping structure makes the solid filter screen 13 stably installed on the annular pipe opening 1, and the outer side of the solid filter screen 13 is attached to one end of the annular pipe opening 1, so as to ensure that the air can only enter the annular pipe opening 1 through the solid filter screen 13. The outer side of the pre-cooling box 1 is fixedly connected with an annular pipe opening 16, which is a channel for the air after pre-cooling to exit the pre-cooling box 1. The gas absorption screen 20 is arranged outside the annular pipe opening 16, and is used to filter the pre-cooled air again and absorb harmful gas therein. The outer side of the pre-cooling box 1 is fixedly connected with two spring telescopic rods 17, and is located outside the two sides of the annular pipe opening 16. One end of the spring telescopic rod 17 is fixedly connected with a push plate 18, and the outer side of the gas absorption screen 20 is fixedly connected with two baffle plates 21, the outer side of the baffle plate 21 is attached to the outer side of the push plate 18, the spring telescopic rod 17 applies pressure to the baffle plate 21 through the push plate 18, and the stability of the installation of the gas absorption screen 20 is ensured. The inner side of the annular pipe opening 16 is provided with an annular groove 19, and one side of the gas absorption screen 20 is provided with a sealing ring, which is clamped in the inner side of the annular groove 19. The sealing structure enhances the sealing property between the gas absorption screen 20 and the annular pipe opening 16. The outer sides of the gas absorption screen 20 and the annular pipe opening 16 are fixedly connected with L-shaped blocks 22, the outer sides of the two L-shaped blocks 22 are attached, and the stability of the installation is further ensured.

[0027] Specifically, before the air is pre-cooled, it will be filtered by the solid filter screen 13 first. The mesh size of the solid filter screen 13 is carefully designed to effectively intercept small particles in the air, such as dust, sand and other impurities. If these impurities enter the subsequent air separation device, they will cause damage such as wear and tear and blockage. The presence of the solid filter screen 13 can ensure that the air entering the pre-cooling box 1 is relatively clean, providing good conditions for subsequent pre-cooling and air separation processing. Moreover, the solid filter screen 13 adopts a convenient quick-release structure. When the solid filter screen 13 accumulates too many impurities and affects the filtering effect, it can be easily removed by gently pressing the elastic clamping block 14 to make it disengage from the clamping groove 15, and then the solid filter screen 13 can be easily removed for cleaning or replacement, which is simple and convenient to operate and greatly improves the maintenance efficiency. After the air is cooled, it will be filtered again by the gas absorption screen 20. The gas absorption screen 20 contains special chemicals or adsorbent materials that can chemically react or physically adsorb harmful gases such as sulfur dioxide and nitrogen oxides in the air, removing these harmful gases from the air. After filtering through the gas absorption screen 20, the air discharged is even purer and meets the requirements of subsequent links for air quality. The gas absorption screen 20 is sealed between the annular pipe port two 16 through the spring extension rod 17, the push plate 18, the baffle 21, the annular groove 19, and the sealing ring and L-shaped block 22, etc. structure, which enhances the sealing performance between the gas absorption screen 20 and the annular pipe port two 16, effectively preventing unfiltered air from escaping from the gap, ensuring that the pre-cooled air can directly enter the next step for processing, and ensuring the stable operation of the entire air separation device.

[0028] Working principle: First, the external air enters the inside of the pre-cooling box 1 from the annular pipe port one 12, and the area enclosed by the baffle 11 and the inner wall of the pre-cooling box 1 is filled with cooling liquid. After starting the water pump 5, the cooling liquid enters the inside of the multiple S-shaped condensing pipes 2 from the combined pipe one 3, and then is pumped out by the water pump 5 through the combined pipe two 4 and the water inlet pipe 6, and then is transported to the inside of the refrigeration device 7 through the adapter pipe 8 for cooling, and then is transported to the spray head plate 10 through the water outlet pipe 9 for spraying. In this way, a water curtain formed by the cooling liquid is formed inside the pre-cooling box 1, and the air is directly contacted with the water curtain to be cooled, and also contacts with the multiple cooled S-shaped condensing pipes 2 to continuously maintain a low temperature and be discharged from the annular pipe port two 16, completing the air pre-cooling process. In addition, the air will be filtered by the solid filter screen 13 before pre-cooling to remove small particles in the air, and will be filtered again after cooling to absorb harmful gases in the air through the gas absorption screen 20, and the solid filter screen 13 adopts a convenient quick-release structure that can be easily removed, and the gas absorption screen 20 enhances the sealing performance to ensure that the pre-cooled air can directly enter the next step for processing.

[0029] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An air pre-cooling mechanism of an air separation unit, comprising a pre-cooling box (1) and a filter assembly, characterized in that: The filter assembly is arranged on the two sides outside the pre-cooling box (1), a water pump (5) is installed on the top of the pre-cooling box (1), an input end of the water pump (5) is fixedly connected with a water inlet pipe (6), an output end of the water pump (5) is fixedly connected with a connecting pipe (8), and a pre-cooling assembly is arranged in the pre-cooling box (1) and used for cooling air. The pre-cooling assembly comprises a plurality of S-shaped condensing pipes (2), one end of each of the S-shaped condensing pipes (2) is fixedly connected with a combined pipe one (3), the other end of each of the S-shaped condensing pipes (2) is fixedly connected with a combined pipe two (4), a partition plate (11) is fixedly connected inside the pre-cooling box (1), a refrigeration device (7) is installed on the top of the pre-cooling box (1), an output end of the refrigeration device (7) is fixedly connected with a water outlet pipe (9), and one end of the water outlet pipe (9) penetrates through the inner wall of the pre-cooling box (1) and is fixedly connected with a shower plate (10).

2. The air pre-cooling mechanism of the air separation apparatus according to claim 1, characterized in that: One end of the combined pipe one (3) penetrates through the partition plate (11), and one end of the water inlet pipe (6) penetrates through the inner wall of the pre-cooling box (1) and is fixedly connected with the outside of the combined pipe two (4).

3. The air pre-cooling mechanism of the air separation unit according to claim 1, characterized in that: One end of the connecting pipe (8) is fixedly connected with the input end of the refrigeration device (7), and the shower plate (10) is located directly above the area surrounded by the partition plate (11) and the inner wall of the pre-cooling box (1).

4. The air pre-cooling mechanism of the air separation apparatus according to claim 1, characterized in that: The filter assembly comprises a solid filter screen (13) and a gas absorption screen (20), one side outside the pre-cooling box (1) is fixedly connected with a ring-shaped pipe opening one (12), and the solid filter screen (13) is arranged outside the ring-shaped pipe opening one (12).

5. The air pre-cooling mechanism of the air separation apparatus according to claim 4, wherein: Two elastic clamping blocks (14) are fixedly connected outside the solid filter screen (13).

6. The air pre-cooling mechanism of the air separation apparatus according to claim 5, wherein: The outside of the elastic clamping block (14) is clamped with the inside of the clamping groove (15), and the outside of the solid filter screen (13) is attached to one end of the ring-shaped pipe opening one (12).

7. The air pre-cooling mechanism of the air separation apparatus according to claim 4, wherein: The other side outside the pre-cooling box (1) is fixedly connected with a ring-shaped pipe opening two (16), the gas absorption screen (20) is arranged outside the ring-shaped pipe opening two (16), two spring telescopic rods (17) are fixedly connected outside the pre-cooling box (1) and located outside the ring-shaped pipe opening two (16), and one end of each of the spring telescopic rods (17) is fixedly connected with a push plate (18).

8. The air pre-cooling mechanism of the air separation apparatus according to claim 7, wherein: Two baffle plates (21) are fixedly connected outside the gas absorption screen (20), the outside of the baffle plate (21) is attached to the outside of the push plate (18), a ring-shaped groove (19) is formed in the inside of the ring-shaped pipe opening two (16), a sealing ring is arranged on one side of the gas absorption screen (20) and clamped in the inside of the ring-shaped groove (19), and L-shaped blocks (22) are fixedly connected outside the gas absorption screen (20) and the ring-shaped pipe opening two (16).

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