CN219868776U - Liquefied air preparation system - Google Patents

Abstract

The utility model relates to the technical field of industrial gas, in particular to a liquefied air preparation system, which comprises a filter, a compressor, a purifier and a liquefying device, wherein a first inlet and a first outlet are arranged on the filter, the first inlet is suitable for being communicated with the outside to suck air, the first outlet is suitable for outputting air after filtering impurities, a second inlet and a second outlet are arranged on the compressor, the second inlet is connected with the first outlet through a first pipeline, the second outlet is suitable for outputting compressed air, a third inlet and a third outlet are arranged on the purifier, the third inlet is connected with the second outlet through a second pipeline, the third outlet is suitable for outputting purified air, a fourth inlet and a fourth outlet are arranged on the liquefying device, the fourth inlet is suitable for outputting liquefied air through a third pipeline, the structure is simple, the operation is convenient, the prepared liquid air has fewer impurities, and the nitrogen-oxygen ratio is closer to the air ratio.

Description

Liquefied air preparation system

Technical Field

The utility model relates to the technical field of industrial gas, in particular to a liquefied air preparation system.

Background

The high-pressure clean compressed air is a common industrial gas, is widely applied to various fields of industry, aviation, aerospace and the like, and can be used as operation, control, raw material, environment-maintaining gas and the like.

In the prior art, air sucked in from the atmosphere is compressed into high-pressure air by an air compressor for users to use. But the air in the atmosphere contains more components such as water, impurities and the like, and the air usually brings oil stains, particles and other impurities into the air in the compression process of the high-pressure compressor, if the impurities are not removed in the treatment process, the potential safety hazard exists in the use process of the compressed air.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect that impurities such as oil dirt and particles possibly are brought in the air compression process of the high-pressure compressor in the prior art, and the liquefied air is prepared by adopting the low-temperature liquid to compress and gasify at high pressure to obtain the high-pressure clean air.

In order to solve the above technical problems, the present utility model provides a liquefied air preparation system, comprising:

the filter is provided with a first inlet and a first outlet, the first inlet is suitable for being communicated with the outside to suck air, and the first outlet is suitable for outputting air after filtering impurities;

the compressor is provided with a second inlet and a second outlet, the second inlet is connected with the first outlet through a first pipeline, and the second outlet is suitable for outputting compressed air;

the purification device is provided with a third inlet and a third outlet, the third inlet is connected with the second outlet through a second pipeline, and the third outlet is suitable for outputting purified air;

the liquefying device is provided with a fourth inlet and a fourth outlet, the fourth inlet is connected with the third outlet through a third pipeline, and the fourth outlet is suitable for outputting liquefied air.

Further, the liquefied air preparation system, the liquefying device includes:

the refrigerating tank is used for storing a refrigerating medium, two ends of the refrigerating channel are respectively provided with a fifth inlet and a fifth outlet, the output end of the refrigerating tank is communicated with the fifth inlet of the refrigerating channel, the fifth outlet is communicated with the purifying device, and two ends of the liquefying channel are respectively connected with the fourth inlet and the fourth outlet;

the refrigeration channel and the liquefaction channel exchange heat to cool the refrigeration channel.

Further, the liquefied air preparation system, the liquefying device further comprises:

the supercharging tank is connected with the refrigerating tank and is suitable for increasing the pressure of the refrigerating tank;

a flow meter, disposed on the refrigeration channel, adapted to detect a flow rate of the refrigeration medium in the refrigeration channel;

the first pressure gauge is arranged on a pipeline between the pressurizing tank and the refrigerating tank;

and the second pressure gauge is arranged on the refrigerating channel and is suitable for detecting the pressure in the refrigerating channel.

Further, the liquefied air preparation system, the purification device comprises:

the two purifiers are arranged in parallel, two ends of each purifier are respectively provided with an air inlet and an air outlet, the air inlet is communicated with the third inlet through a fourth pipeline, the air outlet is communicated with the third outlet through a fifth pipeline, and the purifiers have a purifying state of conveying gas from the air inlet to the air outlet, a regenerating state of conveying gas from the air outlet to the air inlet and a blowing and cooling state;

a heater, one end of which is communicated with the air outlet, and the other end of which is communicated with the fifth outlet, and the heater is suitable for heating the refrigeration medium in the regeneration state;

the first air release piece is arranged on a sixth pipeline, one end of the sixth pipeline is communicated with the air inlet, the other end of the sixth pipeline is communicated with the fifth outlet, and the first air release piece is suitable for discharging the gas in the purifier in the regeneration state when in the cold blowing state.

Further, the liquefied air preparation system further comprises:

and the storage tank is connected with the fourth outlet through a storage pipeline and is suitable for storing the liquefied air.

Further, the liquefied air preparation system further comprises:

a third pressure gauge, provided on the first pipe, adapted to detect the pressure of the compressed air;

and the second air release piece is arranged on the first pipeline and positioned behind the third pressure and is suitable for releasing the compressed air.

Further, the liquefied air preparation system further comprises:

a thermometer, disposed on the storage line, adapted to detect a temperature on the storage line;

and a fourth pressure gauge, which is arranged on the storage pipeline and is suitable for detecting the pressure on the storage pipeline.

The technical scheme of the utility model has the following advantages:

1. the utility model provides a liquefied air preparation system, which comprises a filter, a compressor, a purification device and a liquefying device, wherein the filter is provided with a first inlet and a first outlet, the first inlet is suitable for being communicated with the outside to suck air, the first outlet is suitable for outputting air after filtering impurities, the compressor is provided with a second inlet and a second outlet, the second inlet is connected with the first outlet through a first pipeline, the second outlet is suitable for outputting compressed air, the purification device is provided with a third inlet and a third outlet, the third inlet is connected with the second outlet through a second pipeline, the third outlet is suitable for outputting purified air, the liquefying device is provided with a fourth inlet and a fourth outlet, the fourth inlet is connected with the third outlet through a third pipeline, and the fourth outlet is suitable for outputting liquefied air.

Outside air enters the filter through the first inlet and is filtered out impurities such as dust and the like and then is input into the compressor through the first pipeline for compression, the compressed air is input into the purifying device through the second pipeline for removing carbon dioxide, hydrocarbon, moisture and the like in the compressed air, and the purified air is input into the liquefying device through the third pipeline for liquefying the air into liquid air.

2. The utility model provides a liquefied air preparation system, a liquefying device comprises a refrigerating tank, a refrigerating channel and a liquefying channel, wherein the refrigerating channel and the liquefying channel are arranged in parallel, the refrigerating tank is used for storing a refrigerating medium, a fifth inlet and a fifth outlet are respectively arranged at two ends of the refrigerating channel, the output end of the refrigerating tank is communicated with the fifth inlet of the refrigerating channel, the fifth outlet is communicated with a purifying device, the two ends of the liquefying channel are respectively connected with a fourth inlet and a fourth outlet, and the refrigerating channel and the liquefying channel exchange heat to cool the refrigerating channel.

The refrigerating medium enters the refrigerating channel from the fifth inlet to cool the liquefying device, the refrigerating medium after absorbing heat is conveyed to the purifying device from the fifth outlet, air output from the purifying device enters the liquefying channel from the fourth inlet, and the air is cooled and liquefied into liquid air by the liquefying device and then is output from the fourth outlet.

3. The utility model provides a liquefied air preparation system, a purification device comprises a purifier, a heater and a first air discharging part, wherein the purifier is provided with two parallel units, two ends of the purifier are respectively provided with an air inlet and an air outlet, the air inlet is communicated with a third inlet through a fourth pipeline, the air outlet is communicated with the third outlet through a fifth pipeline, the purifier is provided with a purification state of conveying gas from the air inlet to the air outlet, a regeneration state of conveying gas from the air outlet to the air inlet and a blowing-cooling state, one end of the heater is communicated with the air outlet, the other end of the heater is communicated with the fifth outlet, the heater is suitable for heating a refrigerating medium in the regeneration state, the first air discharging part is arranged on a sixth pipeline, one end of the sixth pipeline is communicated with the air inlet, the other end of the sixth pipeline is communicated with the fifth outlet, and the first air discharging part is suitable for discharging the gas in the purifier in the regeneration state in the blowing-cooling state.

When the purifier is in a working state, compressed air enters a fourth pipeline from a third inlet, carbon dioxide, hydrocarbon, moisture and the like are removed from the purifier, and then the compressed air is output to a third outlet from a fifth pipeline, so that the purifier has a simple structure, is convenient to operate, the prepared liquid air has fewer impurities, the nitrogen-oxygen ratio is closer to that of the air, when the purifier is in a regeneration state, a refrigerating medium subjected to heat exchange in the liquefying device is conveyed to a heater from the fifth outlet to be heated, and then enters an air outlet to separate out the carbon dioxide, hydrocarbon, moisture and the like which are adsorbed and saturated from the air outlet, and when the purifier is in a blowing-cooling state, the refrigerating medium subjected to heat exchange in the liquefying device is conveyed to the purifier from the fifth outlet to be discharged to the outside from a first air discharging piece after being purged, so that the purifier can be repeatedly used, the utilization rate of the purifier is improved, and the use cost is reduced.

4. The liquefied air preparation system provided by the utility model further comprises the storage tank connected with the fourth outlet through the storage pipeline, so that liquefied air can be conveniently collected, stored and transported, the utilization rate of the liquefied air is improved, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a liquefied air preparation system provided in an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a purifier in a liquefied air preparation system provided in an embodiment of the present utility model;

reference numerals illustrate: 1. a filter; 11. a first inlet; 12. a first outlet; 2. a compressor; 21. a second inlet; 22. a second outlet; 23. a third pressure gauge; 24. a second deflating member; 3. a purifying device; 31. a third inlet; 32. a third outlet; 33. a purifier; 331. a first switching valve; 332. a second switching valve; 333. a third switching valve; 334. a fourth switching valve; 34. a fourth pipeline; 341. a fifth switching valve; 342. a sixth switching valve; 35. a fifth pipeline; 351. a seventh switching valve; 352. an eighth switching valve; 36. a heater; 361. a ninth switching valve; 362. a tenth switching valve; 37. a first deflation member; 38. a sixth pipeline; 381. an eleventh switching valve; 39. a bypass pipeline; 391. a twelfth switching valve; 4. a liquefying device; 41. a fourth inlet; 42. a fourth outlet; 43. a liquefaction channel; 44. a refrigeration channel; 45. a thermometer; 46. a fourth pressure gauge; 5. a refrigeration tank; 51. a fifth inlet; 52. a fifth outlet; 6. a boost tank; 7. a flow meter; 8. a first pressure gauge; 9. a second pressure gauge; 10. a storage tank.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

As shown in fig. 1, a liquefied air preparation system provided in this embodiment includes a filter 1, a compressor 2, a purifying device 3 and a liquefying device 4, wherein a first inlet 11 and a first outlet 12 are disposed on the filter 1, the first inlet 11 is adapted to be in communication with the outside for sucking air, the first outlet 12 is adapted to output air after filtering impurities, a second inlet 21 and a second outlet 22 are disposed on the compressor 2, the second inlet 21 is connected with the first outlet 12 through a first pipeline, the second outlet 22 is adapted to output compressed air, a third inlet 31 and a third outlet 32 are disposed on the purifying device 3, the third inlet 31 is connected with the second outlet 22 through a second pipeline, the third outlet 32 is adapted to output purified air, a fourth inlet 41 and a fourth outlet 42 are disposed on the liquefying device 4, the fourth inlet 41 is connected with the third outlet 32 through a third pipeline, and the fourth outlet 42 is adapted to output liquefied air.

Outside air enters the filter 1 through the first inlet 11, dust and other impurities are filtered, then the filtered air is input into the compressor 2 through the first pipeline and is pressurized to be more than 0.31MPaA for compression, the compressed air is input into the purifying device 3 through the second pipeline to remove carbon dioxide, hydrocarbon, moisture and the like in the compressed air, and the purified air is input into the liquefying device 4 through the third pipeline to liquefy the air into liquid air.

In this embodiment, the liquefying device 4 includes a refrigerating tank 5, and a refrigerating channel 44 and a liquefying channel 43 that are arranged in parallel, wherein a refrigerating medium is stored in the refrigerating tank 5, two ends of the refrigerating channel 44 are respectively a fifth inlet 51 and a fifth outlet 52, an output end of the refrigerating tank 5 is communicated with the fifth inlet 51 of the refrigerating channel 44, the fifth outlet 52 is communicated with the purifying device 3, two ends of the liquefying channel 43 are respectively connected with the fourth inlet 41 and the fourth outlet 42, and the refrigerating channel 44 and the liquefying channel 43 exchange heat to cool the refrigerating channel 44.

The fifth inlet 51 conveys the refrigerant medium to the refrigerating passage 44 to cool the liquefying device 4, the cooled liquefying device 4 liquefies the air output from the purifying device 3 into liquid air in the liquefying passage 43 and outputs the liquid air from the fourth outlet 42, and the fifth outlet 52 conveys the refrigerant medium after heat absorption to the purifying device 3.

The embodiment does not specifically limit the refrigeration medium, and in order to meet the practical situation, the refrigeration medium in the embodiment adopts liquid nitrogen.

In this embodiment, the liquefying device 4 further includes a booster tank 6, a flowmeter 7, a first pressure gauge 8 and a second pressure gauge 9, where the booster tank 6 is connected with the refrigeration tank 5 and is used for increasing pressure to the refrigeration tank 5, the first pressure gauge 8 is arranged on a pipeline between the booster tank 6 and the refrigeration tank 5 and is used for detecting pressure in the refrigeration tank 5, the flowmeter 7 and the second pressure gauge 9 are arranged on the refrigeration channel 44 and are used for detecting flow and pressure of the refrigeration medium in the refrigeration channel 44, and when detecting that the pressure in the refrigeration tank 5 is lower than a set value, the booster tank 6 can be opened to increase pressure in the refrigeration tank so as to facilitate outputting the refrigeration medium.

In this embodiment, the purifying device 3 includes a purifier 33, a heater 36 and a first air release member 37, two purifiers 33 are arranged in parallel, two ends of the purifier 33 are respectively provided with an air inlet and an air outlet, the air inlet is communicated with the third inlet 31 through a fourth pipeline 34, the air outlet is communicated with the third outlet 32 through a fifth pipeline 35, and switching valves are arranged on the fourth pipeline 34 and the fifth pipeline 35. The purifier 33 has a purifying state in which air is supplied from the air inlet to the air outlet, a regenerating state in which air is supplied from the air outlet to the air inlet, and a cooling state, and when one of the two purifiers 33 is in the operating state, the other is in the regenerating state, and the two purifiers alternately operate. One end of the heater 36 is communicated with the air outlet, the other end of the heater 36 is communicated with the fifth outlet 52, control valves are respectively arranged at two ends of the heater 36, and a bypass pipeline 39 is arranged between the air outlet and the fifth outlet 52 and is suitable for directly communicating the air outlet with the fifth outlet 52. The first air release piece 37 is arranged on the sixth pipeline 38, one end of the sixth pipeline 38 is communicated with the air inlet of the purifier 33, the other end of the sixth pipeline 38 is communicated with the fifth outlet 52, the first air release piece 37 is suitable for discharging air in the purifier 33 in the regeneration state when in the regeneration state, the first air release piece 37 and the air inlet are directly provided with an on-off valve, and the sixth pipeline 38 is also provided with an on-off valve.

When one purifier 33 is in a working state, the third switch valve 333 and the fifth switch valve 341 are opened, the first switch valve 331, the sixth switch valve 342 and the seventh switch valve 351 are closed, compressed air enters the fourth pipeline 34 from the third inlet 31, carbon dioxide, hydrocarbon, moisture and the like are removed from the purifier 33, and then the air is output to the third outlet 32 from the fifth pipeline 35; at this time, the other purifier 33 is in regeneration and cooling state, the second switch valve 332, the eighth switch valve 352, the ninth switch valve 361 and the tenth switch valve 362 are opened during regeneration, the fourth switch valve 334, the eleventh switch valve 381 and the twelfth switch valve 391 are closed, the refrigerant after heat exchange in the liquefying device 4 is conveyed to the heater 36 from the fifth outlet 52 to be heated into gas state, and carbon dioxide, hydrocarbon and water adsorbed on the adsorbent are analyzed and separated from the purifier 33 from the gas outlet. When in cooling, the twelfth switch valve 391 is opened, the ninth switch valve 361 and the tenth switch valve 362 are closed, the cooling medium after heat exchange is conveyed into the purifier 33 for cooling, the temperature of the adsorbent is reduced, and the separated carbon dioxide, hydrocarbon, moisture and the like are discharged to the outside through the first air release member 37 after being purged, so that the purifier can be repeatedly utilized, the utilization rate of the purifier 33 is improved, the use cost is reduced, and the purifier has the advantages of simple structure, convenience in operation, more approximate air proportion of the prepared liquid air and less impurities.

When the refrigerant in the refrigerant channel 44 is excessive, the excessive refrigerant can be released through the sixth pipeline 38.

The heater 36 is not particularly limited in this embodiment, and the heater 36 in this embodiment employs an electric heater 36 in order to conform to the actual situation.

The first bleed air is not particularly limited in this embodiment, and in order to meet the practical situation, the first bleed member 37 in this embodiment adopts a bleed muffler.

In this embodiment, the fourth outlet 42 is connected with the storage tank 10 through a storage pipeline, and the storage tank 10 can collect, store and transport the liquefied liquid air, so that the utilization rate of the liquefied air is improved, and the use cost is reduced.

A third pressure gauge 23 is also arranged on the first pipeline at the side close to the compressor 2, and is suitable for detecting the pressure of the compressed air, a second air release piece 24 is also arranged on the first pipeline after the third pressure, and when the air flow rate after the compression is overlarge, part of the compressed air can be released through the second air release piece 24.

A thermometer 45 and a fourth pressure gauge 46 are also provided on the storage line, adapted to detect the temperature and pressure of the output liquefied air.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (7)

1. A liquefied air preparation system, comprising:

the filter (1), the filter (1) is provided with a first inlet (11) and a first outlet (12), the first inlet (11) is suitable for being communicated with the outside to suck air, and the first outlet (12) is suitable for outputting air after filtering impurities;

the compressor (2) is provided with a second inlet (21) and a second outlet (22), the second inlet (21) is connected with the first outlet (12) through a first pipeline, and the second outlet (22) is suitable for outputting compressed air;

the purification device (3), a third inlet (31) and a third outlet (32) are arranged on the purification device (3), the third inlet (31) is connected with the second outlet (22) through a second pipeline, and the third outlet (32) is suitable for outputting purified air;

the liquefying device (4) is provided with a fourth inlet (41) and a fourth outlet (42), the fourth inlet (41) is connected with the third outlet (32) through a third pipeline, and the fourth outlet (42) is suitable for outputting liquefied air.

2. The liquefied air preparation system according to claim 1, wherein the liquefying device (4) comprises:

the device comprises a refrigeration tank (5), a liquefaction channel (43) and a refrigeration channel (44) which are arranged in parallel, wherein the refrigeration tank (5) is used for storing a refrigeration medium, two ends of the refrigeration channel (44) are respectively provided with a fifth inlet (51) and a fifth outlet (52), the output end of the refrigeration tank (5) is communicated with the fifth inlet (51) of the refrigeration channel (44), the fifth outlet (52) is communicated with the purification device (3), and two ends of the liquefaction channel (43) are respectively connected with the fourth inlet (41) and the fourth outlet (42);

the refrigeration channel (44) and the liquefaction channel (43) exchange heat to cool the refrigeration channel (44).

3. The liquefied air preparation system according to claim 2, wherein the liquefying device (4) further comprises:

a booster tank (6) connected to the refrigeration tank (5) and adapted to increase the pressure of the refrigeration tank (5);

a flow meter (7) arranged on the refrigeration channel (44) and adapted to detect the flow of the refrigeration medium in the refrigeration channel (44);

a first pressure gauge (8) arranged on a pipeline between the pressurizing tank (6) and the refrigerating tank (5);

a second pressure gauge (9) arranged on the refrigeration channel (44) and adapted to detect the pressure in the refrigeration channel (44).

4. Liquefied air preparation system according to claim 2, characterized in that the purification device (3) comprises:

the two purifiers (33) are arranged in parallel, two ends of each purifier (33) are respectively provided with an air inlet and an air outlet, the air inlet is communicated with the third inlet (31) through a fourth pipeline (34), the air outlet is communicated with the third outlet (32) through a fifth pipeline (35), and the purifiers (33) have a purification state of conveying the air from the air inlet to the air outlet, and a regeneration state and a cooling state of conveying the refrigerating medium from the air outlet to the air inlet;

a heater (36), one end of the heater (36) is communicated with the air outlet, the other end is communicated with the fifth outlet (52), and in the regeneration state, the heater (36) is suitable for heating the refrigeration medium;

the first air release piece (37) is arranged on a sixth pipeline (38), one end of the sixth pipeline (38) is communicated with the air inlet, the other end of the sixth pipeline is communicated with the fifth outlet (52), and the first air release piece (37) is suitable for discharging the refrigerating medium in the purifier (33) in the cold blowing state.

5. The liquefied air preparation system of claim 1, further comprising:

-a storage tank (10) connected to said fourth outlet (42) through a storage line, adapted to store said liquefied air.

6. The liquefied air preparation system of claim 1, further comprising:

a third pressure gauge (23) provided on the first pipe and adapted to detect the pressure of the compressed air;

a second bleed (24) is disposed on the first conduit, after the third pressure, and adapted to release the compressed air.

7. The liquefied air preparation system as claimed in claim 5, further comprising:

a thermometer (45) disposed on the storage line and adapted to detect a temperature on the storage line;

a fourth pressure gauge (46) is disposed on the storage line and adapted to detect a pressure on the storage line.