CN223710066U - An air precooling mechanism for an air separation unit - Google Patents

Abstract

The utility model relates to the technical field of air precooling, and discloses an air precooling mechanism of an air separation device, which comprises a precooling box and filtering components, wherein the filtering components are arranged on two sides of the outer part of the precooling box, a water pump is arranged at the top of the precooling box, 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, the precooling component is arranged in the precooling box and is used for cooling air, the precooling component comprises a plurality of S-shaped condensing pipes, the S-shaped condensing pipes are arranged in the precooling box, one ends of the S-shaped condensing pipes are fixedly connected with a first combination pipe, and the other ends of the S-shaped condensing pipes are fixedly connected with a second combination pipe. In 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 between the cooling liquid and the air are greatly increased by virtue of the S-shaped condensing pipe, so that the heat exchange is more sufficient and efficient, and the air can be quickly reduced to a low-temperature state.

Description

Air precooling mechanism of air separation device

Technical Field

The utility model relates to the technical field of air precooling, in particular to an air precooling mechanism of an air separation device.

Background

In modern industrial production, an air separation device plays a vital role, and the air separation device meets the requirements of different industries on gases by separating air into various gases such as oxygen, nitrogen and the like. The air pre-cooling mechanism is used as an important component of the air separation device, and the performance of the air pre-cooling mechanism directly influences the operation efficiency and the quality of gas products of the whole air separation device. With the rapid development of industry, the requirements on the processing capacity, energy consumption, gas purity and the like of the air device are increasing, which also promotes the continuous technical improvement and innovation of the air precooling mechanism.

At present, a common air pre-cooling mechanism of an air separation device generally adopts an indirect heat exchange cooling mode, and the indirect heat exchange cooling utilizes a heat exchanger to enable air and cooling liquid to exchange heat under the condition of not directly contacting.

However, there are some significant problems with the prior art. In the actual large-scale chemical production scene, the air treatment capacity is huge and the gas purity requirement is extremely high. The existing precooling mechanism has the defect of cooling efficiency, like the traditional heat exchanger, because of the limitation of heat exchange area and structure, air and cooling liquid cannot be fully contacted, heat exchange is insufficient, and air is difficult to quickly drop to an ideal low-temperature state, so that the subsequent gas separation efficiency of the air separation device is influenced, and the air precooling mechanism of the air separation device is provided by the technology in the field to solve the problems.

Disclosure of utility model

In order to make up for the defects, the utility model provides an air pre-cooling mechanism of an air separation device, and aims to solve the problem that the air pre-cooling mechanism of the air separation device in the prior art has low air pre-cooling treatment efficiency.

The air pre-cooling mechanism of the air separation device comprises a pre-cooling box and filtering components, wherein the filtering components are arranged on two sides of the outer part of the pre-cooling box, a water pump is arranged at the top of the pre-cooling box, 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 the pre-cooling component is arranged in the pre-cooling box and used for cooling air;

The precooling assembly comprises a plurality of S-shaped condensing pipes, the S-shaped condensing pipes are arranged in a precooling box, one ends of the S-shaped condensing pipes are fixedly connected with a first combined pipe, the other ends of the S-shaped condensing pipes are fixedly connected with a second combined pipe, a partition plate is fixedly connected with the inside of the precooling box, a refrigerating device is mounted at the top of the precooling box, an output end of the refrigerating device is fixedly connected with a water outlet pipe, and one end of the water outlet pipe penetrates through the inner wall of the precooling box and is fixedly connected with a spray head plate.

Further, one end of the first combined pipe penetrates through the partition plate, and one end of the water inlet pipe penetrates through the inner wall of the pre-cooling box and is fixedly connected with the outer side of the second combined pipe.

Further, one end of the connecting pipe is fixedly connected with the input end of the refrigerating device, and the spray head plate is positioned right above the area surrounded by the partition plate and the inner wall of the precooling box.

Further, the filter component comprises a solid filter screen and a gas absorption net, wherein an annular pipe orifice I is fixedly connected to one side of the outer part of the pre-cooling box, and the solid filter screen is arranged on the outer side of the annular pipe orifice I.

Further, two clamping grooves are formed in the outer side of the first annular pipe orifice, and two elastic clamping blocks are fixedly connected to the outer side of the solid filter screen.

Further, the outside of elasticity fixture block and the inside looks block of draw-in groove, the outside of solid filter screen is laminated with annular mouth of pipe one's one end.

Further, the annular pipe orifice II is fixedly connected to the other side of the outer portion of the precooling box, the gas absorption net is arranged on the outer side of the annular pipe orifice II, two spring telescopic rods are fixedly connected to the outer side of the precooling box and located on the two outer sides of the annular pipe orifice II, and one end of each spring telescopic rod is fixedly connected with a push plate.

Further, two baffles are fixedly connected to the outer side of the gas absorption net, the outer side of the baffles is attached to the outer side of the pushing plate, an annular groove is formed in the inner side of the second annular pipe opening, a sealing ring is arranged on one side of the gas absorption net and is clamped to the inner side of the annular groove, L-shaped blocks are fixedly connected to the outer sides of the gas absorption net and the second annular pipe opening, and the outer sides of the two L-shaped blocks are attached to each other.

The utility model has the following beneficial effects:

1. In 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 between the cooling liquid and the air are greatly increased by virtue of the S-shaped condensing pipe, so that the heat exchange is more sufficient and efficient, and the air can be quickly reduced to a low-temperature state.

2. According to the utility model, the solid filter screen and the gas absorption net are respectively used for filtering the air before and after precooling, the solid filter screen intercepts fine particles, the gas absorption net removes harmful gas, so that the air entering the subsequent links is clean and meets the quality requirement, and the solid filter screen adopts a convenient and fast-disassembly structure, so that the cleaning and the replacement are convenient, and the maintenance efficiency is improved.

Drawings

Fig. 1 is a perspective view of an air pre-cooling mechanism of an air separation apparatus according to the present utility model;

Fig. 2 is a schematic diagram of an internal structure of a pre-cooling box of an air pre-cooling mechanism of an air separation device according to the present utility model;

fig. 3 is a schematic structural diagram of a push plate of an air pre-cooling mechanism of an air separation device according to the present utility model.

Legend description:

1. The device comprises a pre-cooling box, a S-shaped condensation pipe, a first combination pipe, a second combination pipe, a 5 water pump, a 6 water inlet pipe, a 7 refrigerating device, a 8 connecting pipe, a 9 water outlet pipe, a10 nozzle plate, a 11 partition plate, a 12 annular pipe orifice, a 13 solid filter screen, a14 elastic clamping block, a 15 clamping groove, a 16 annular pipe orifice, a 17 spring telescopic rod, a 18 push plate, a 19 annular groove, a 20 gas absorbing net, a 21 baffle plate, a 22L-shaped block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, an air pre-cooling mechanism of an air separation device according to an embodiment of the present utility model includes a pre-cooling tank 1 and a filtering assembly disposed at both sides of the outside of the pre-cooling tank 1, and is mainly used for filtering air entering and exiting the pre-cooling tank 1. The top of the pre-cooling box 1 is provided with a water pump 5, the water pump 5 is used for providing power for the circulating flow of the cooling liquid, the input end of the water pump 5 is fixedly connected with a water inlet pipe 6, the water inlet pipe 6 is used for pumping the cooling liquid into the water pump 5 from the second combined pipe 4, the output end of the water pump 5 is fixedly connected with a connecting pipe 8, and the connecting pipe 8 is used for conveying the cooling liquid output from the water pump 5 into a refrigerating device 7. The inside of precooling box 1 is provided with the precooling subassembly, and the precooling subassembly is used for cooling down the air. The precooling subassembly includes a plurality of S-shaped condenser pipes 2, and S-shaped condenser pipe 2 sets up in the inside of precooling box 1, and a plurality of S-shaped condenser pipes 2 can increase the area of contact of coolant liquid and air, improves the cooling effect. One end of each S-shaped condensation pipe 2 is fixedly connected with a first combination pipe 3, the first combination pipe 3 is used for distributing cooling liquid into each S-shaped condensation pipe 2, the other end of each S-shaped condensation pipe 2 is fixedly connected with a second combination pipe 4, and the second combination pipe 4 is responsible for collecting the cooling liquid passing through the S-shaped condensation pipes 2. The inside of the pre-cooling box 1 is fixedly connected with a partition plate 11, and the partition plate 11 divides the inside of the pre-cooling box 1 into a region for placing cooling liquid. The top of the pre-cooling box 1 is provided with a refrigerating device 7, the refrigerating device 7 is used for refrigerating the cooling liquid, so that the cooling liquid is kept in a low-temperature state, the output end of the refrigerating device 7 is fixedly connected with a water outlet pipe 9, 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 spray head plate 10, and the spray head plate 10 is used for forming a water curtain for the cooled cooling liquid in a spraying mode. One end of the first combination pipe 3 penetrates through the partition plate 11, so that cooling liquid can enter the first combination pipe 3 from an area surrounded by the partition plate 11 and the inner wall of the pre-cooling tank 1. 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 outer side of the second combined pipe 4, so that cooling liquid can be pumped out of the second combined pipe 4 through the water inlet pipe 6 by the water pump 5. One end of the connecting pipe 8 is fixedly connected with the input end of the refrigerating device 7, so that the cooling liquid is conveyed from the water pump 5 to the refrigerating device 7. The spray head plate 10 is positioned right above the area surrounded by the partition plate 11 and the inner wall of the pre-cooling tank 1, so that sprayed cooling liquid can fall into the area.

Specifically, in the air pre-cooling step of the air separation device, first, the outside normal temperature air enters the pre-cooling tank 1 from the first annular pipe orifice 12. The annular nozzle one 12 serves as an air intake passage, and its position and structural design can ensure smooth and stable air flow into the pre-cooling tank 1. At this time, inside the pre-cooling tank 1, the cooling liquid is placed in the area surrounded by the partition plate 11 and the inner wall of the pre-cooling tank 1, and the cooling liquid is a key medium in the whole pre-cooling process, has good heat conductivity, and can efficiently remove heat in the air. When the water pump 5 is started, the water pump 5 starts to play a role of its power source. Under the strong suction of the water pump 5, the cooling liquid can enter the inside of the plurality of S-shaped condensation pipes 2 from the first combined pipe 3. The first combination pipe 3 is designed to uniformly distribute the coolant to the respective S-shaped condensation pipes 2, thereby ensuring that the coolant can entirely cover the S-shaped condensation pipes 2, thereby increasing the contact area with the surrounding air. The special shape of the plurality of S-shaped condensation pipes 2 greatly increases the contact path and time of the cooling liquid with the air, so that the heat exchange is more sufficient. When the cooling liquid flows in the S-shaped condensation duct 2, the cooling liquid rapidly absorbs heat in the ambient air, and the ambient air temperature is lowered. Subsequently, the temperature of the heat exchanged cooling liquid rises, and the cooling liquid is pumped out by the water pump 5 through the combination pipe II 4 and the water inlet pipe 6. The second combination pipe 4 is responsible for collecting the cooling liquid flowing out of each S-shaped condensation pipe 2 and then conveying the cooling liquid to the water pump 5 through the water inlet pipe 6. The extracted cooling liquid has higher temperature and can not meet the requirement of continuous cooling, so that further treatment is needed. These cooling liquids are then fed via the connecting pipe 8 into the interior of the refrigerating device 7 for cooling. The refrigerating device 7 uses a specific refrigerating technology, such as compression refrigeration or absorption refrigeration, to release the heat of the cooling liquid, so that the temperature of the cooling liquid is greatly reduced, and the cooling liquid is restored to a low-temperature state capable of effectively reducing the temperature. The temperature of the cooling liquid cooled by the refrigerating device 7 can meet the requirement of efficiently cooling the air again. Then, the cooled cooling liquid is conveyed to a nozzle plate 10 for spraying through a water outlet pipe 9. The spray head plate 10 is provided with a plurality of fine spray heads, so that the cooling liquid can be uniformly dispersed into fine water drops, and a layer of water curtain formed by the cooling liquid is formed inside the precooling tank 1. The formation of the water curtain greatly increases the contact area between the cooling liquid and the air, so that the heat exchange between the air and the cooling liquid is more sufficient and efficient. At this time, the air entering the pre-cooling tank 1 is in direct contact with the water curtain, and during the contact process, heat in the air is rapidly transferred to the cooling liquid, and the air temperature is rapidly reduced. And the air can be contacted with a plurality of S-shaped condensing pipes 2 cooled by the cooling liquid, the low-temperature outer wall of the S-shaped condensing pipes 2 can continuously absorb heat in the air, the air temperature is further reduced, the air is continuously kept in a low-temperature state, and finally the air is discharged from the second annular pipe orifice 16, so that the air precooling treatment is finished.

Referring to fig. 1 to 3, the filter assembly includes a solid filter screen 13 and a gas absorbing screen 20, and an annular nozzle one 12 is fixedly connected to one side of the outside of the pre-cooling tank 1, and the annular nozzle one 12 is a passage for external air to enter the pre-cooling tank 1. A solid filter 13 is arranged outside the annular nozzle one 12 for filtering the air before it enters the pre-cooler 1 to remove fine particles from the air. Two clamping grooves 15 are formed in the outer side of the first annular pipe orifice 12, two elastic clamping blocks 14 are fixedly connected to the outer side of the solid filter screen 13, the outer portions of the elastic clamping blocks 14 are clamped with the inner portions of the clamping grooves 15, the clamping structure enables the solid filter screen 13 to be firmly installed on the first annular pipe orifice 12, meanwhile, the outer side of the solid filter screen 13 is attached to one end of the first annular pipe orifice 12, and air is guaranteed to enter the first annular pipe orifice 12 only through the solid filter screen 13. The other side of the outer part of the pre-cooling box 1 is fixedly connected with a second annular pipe orifice 16, and the second annular pipe orifice 16 is a channel for discharging the pre-cooled air out of the pre-cooling box 1. The gas absorbing net 20 is disposed outside the second annular nozzle 16, and is used for filtering the pre-cooled air again to absorb harmful gas therein. The outside fixedly connected with two spring telescopic links 17 of precooling box 1 just is located the outside both sides of annular mouth of pipe two 16, and the one end fixedly connected with push pedal 18 of spring telescopic link 17, the outside fixedly connected with two baffles 21 of gas absorption net 20, the outside laminating of baffle 21 and push pedal 18, spring telescopic link 17 is through the application pressure of push pedal 18 to baffle 21, guarantees the stability of gas absorption net 20 installation. An annular groove 19 is formed in the inner side of the annular pipe orifice II 16, a sealing ring is arranged on one side of the gas absorbing net 20 and is clamped on the inner side of the annular groove 19, and the sealing structure enhances the sealing performance between the gas absorbing net 20 and the annular pipe orifice II 16. The outer sides of the gas absorption net 20 and the annular pipe orifice II 16 are fixedly connected with L-shaped blocks 22, and the outer sides of the two L-shaped blocks 22 are attached, so that the installation stability is further ensured.

Specifically, the air is filtered once by the solid filter 13 before being pre-cooled. The mesh size of the solid filter screen 13 is carefully designed, so that fine particles in the air, such as dust, sand and other impurities, can be effectively intercepted. If the impurities enter a subsequent air separation device, the equipment is damaged by abrasion, blockage and the like, and the existence of the solid filter screen 13 can ensure that the air entering the pre-cooling box 1 is cleaner, so that good conditions are provided for subsequent pre-cooling and air separation treatment. And the solid filter screen 13 adopts the convenient quick detach's structure, when solid filter screen 13 has accumulated more impurity, when influencing the filter effect, only need press gently elasticity fixture block 14, make it break away from draw-in groove 15, just can easily take off solid filter screen 13 and wash or change, easy operation is convenient, has improved maintenance efficiency greatly. After cooling, the air is filtered again, this time through the gas absorbing mesh 20. The gas absorbing net 20 contains special chemical substances or adsorbing materials, and can chemically react with or physically adsorb harmful gases in the air, such as sulfur dioxide, nitrogen oxides and the like, so as to remove the harmful gases from the air. The discharged air is purer after being filtered by the gas absorption net 20, and meets the requirement of the follow-up link on the air quality. The gas absorption net 20 enhances the sealing performance between the gas absorption net and the annular pipe orifice II 16 through the structures of the spring telescopic rod 17, the push plate 18, the baffle 21, the annular groove 19, the sealing ring, the L-shaped block 22 and the like, effectively prevents unfiltered air from escaping from a gap, ensures that the pre-cooled air can directly enter a next step for processing, and ensures the stable operation of the whole air separation device.

The working principle is that firstly, outside air enters the precooling box 1 from a first annular pipe orifice 12, cooling liquid is placed in a region surrounded by a partition plate 11 and the inner wall of the precooling box 1, after a water pump 5 is started, the cooling liquid enters the insides of a plurality of S-shaped condensation pipes 2 from a first combination pipe 3, is pumped out by the water pump 5 through a second combination pipe 4 and a water inlet pipe 6, is conveyed into the refrigerating device 7 through a connecting pipe 8 to be cooled, is conveyed to a spray head plate 10 through a water outlet pipe 9 to be sprayed, a water curtain formed by a layer of cooling liquid is formed in the precooling box 1, air is directly contacted with the water curtain to be cooled, is also contacted with a plurality of cooled S-shaped condensation pipes 2, continuously keeps low temperature to be discharged from a second annular pipe orifice 16, air precooling treatment is completed, in addition, the air is filtered once by a solid filter screen 13, fine particles in the air are removed, after cooling, harmful gases in the air are absorbed by a gas absorption network 20, the solid filter screen 13 can be easily removed through a quick and quick-dismantling structure, the gas absorption network 20 can be directly cooled, and the air can be directly cooled after the air absorption network 20 is sealed, and can be subjected to a next precooling treatment.

It should be noted that the foregoing description is only a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it should be understood that modifications, equivalents, improvements and modifications to the technical solution described in the foregoing embodiments may occur to those skilled in the art, and all modifications, equivalents, and improvements are intended to be included within the spirit and principle of the present utility model.

Claims (8)

1. The air pre-cooling mechanism of the air separation device comprises a pre-cooling box (1) and a filtering component, and is characterized in that the filtering component is arranged on two sides of the outer part of the pre-cooling box (1), a water pump (5) is arranged at the top of the pre-cooling box (1), the input end of the water pump (5) is fixedly connected with a water inlet pipe (6), the output end of the water pump (5) is fixedly connected with a connecting pipe (8), the pre-cooling component is arranged in the pre-cooling box (1), and the pre-cooling component is used for cooling air;

The pre-cooling assembly comprises a plurality of S-shaped condensation pipes (2), the S-shaped condensation pipes (2) are arranged in a pre-cooling box (1), one ends of the S-shaped condensation pipes (2) are fixedly connected with a first combined pipe (3), the other ends of the S-shaped condensation pipes (2) are fixedly connected with a second combined pipe (4), a partition plate (11) is fixedly connected with the inside of the pre-cooling box (1), a refrigerating device (7) is arranged at the top of the pre-cooling box (1), an output end of the refrigerating 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 spray head plate (10).

2. The air pre-cooling mechanism of an air separation device according to claim 1, wherein one end of the first combined pipe (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 outer side of the second combined pipe (4).

3. The air pre-cooling mechanism of an air separation device according to claim 1, wherein one end of the connecting pipe (8) is fixedly connected with the input end of the refrigerating device (7), and the spray head plate (10) is positioned right above an area surrounded by the partition plate (11) and the inner wall of the pre-cooling box (1).

4. The air pre-cooling mechanism of an air separation device according to claim 1, wherein the filtering assembly comprises a solid filter screen (13) and a gas absorbing screen (20), one side of the outer part of the pre-cooling box (1) is fixedly connected with a first annular pipe orifice (12), and the solid filter screen (13) is arranged on the outer side of the first annular pipe orifice (12).

5. The air pre-cooling mechanism of an air separation device according to claim 4, wherein two clamping grooves (15) are formed in the outer side of the first annular pipe orifice (12), and two elastic clamping blocks (14) are fixedly connected to the outer side of the solid filter screen (13).

6. The air pre-cooling mechanism of an air separation device according to claim 5, wherein the outer part of the elastic clamping block (14) is clamped with the inner part of the clamping groove (15), and the outer side of the solid filter screen (13) is attached to one end of the first annular pipe orifice (12).

7. The air pre-cooling mechanism of an air separation device according to claim 4, wherein the other side of the outer part of the pre-cooling box (1) is fixedly connected with a second annular pipe orifice (16), the gas absorbing net (20) is arranged on the outer side of the second annular pipe orifice (16), the outer side of the pre-cooling box (1) is fixedly connected with two spring telescopic rods (17) which are positioned on two outer sides of the second annular pipe orifice (16), and one end of each spring telescopic rod (17) is fixedly connected with a push plate (18).

8. The air pre-cooling mechanism of an air separation device according to claim 7, wherein two baffles (21) are fixedly connected to the outer side of the air absorption net (20), the outer side of each baffle (21) is attached to the outer side of the push plate (18), an annular groove (19) is formed in the inner side of the annular pipe orifice II (16), a sealing ring is arranged on one side of the air absorption net (20) and is clamped to the inner side of the annular groove (19), L-shaped blocks (22) are fixedly connected to the outer sides of the air absorption net (20) and the annular pipe orifice II (16), and the outer sides of the two L-shaped blocks (22) are attached.