CN1228128C - Variable pressure adsorptive oxygen making device suitable for high altitude area - Google Patents
Variable pressure adsorptive oxygen making device suitable for high altitude area Download PDFInfo
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- CN1228128C CN1228128C CN 200310122470 CN200310122470A CN1228128C CN 1228128 C CN1228128 C CN 1228128C CN 200310122470 CN200310122470 CN 200310122470 CN 200310122470 A CN200310122470 A CN 200310122470A CN 1228128 C CN1228128 C CN 1228128C
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Abstract
The present invention relates to a variable-pressure adsorption oxygen producing device which is suitable for high altitude areas. The present invention relates to a variable-pressure adsorption oxygen producing device which belongs to the field of air separation, and the device is composed of an oil-less air compressor, an air cooler, an adsorption tower, a gas storage tank of product gas, a pneumatic valve, a pressure reducing valve, a needle type valve, a flow meter, a flow regulating valve, etc. The present invention is characterized in that a raw gas storage tank 3 is arranged in the device, and the raw gas storage tank 3 is used for stabilizing outlet pressure of an adsorption bed, storing exhaust gas of the compressor in the process of pressure equalizing, reducing flow quantity fluctuation of product gas and reducing influence of environmental pressure on device performance. When the present invention is used in areas whose altitudes exceed over 4000 meters, in order to guarantee the normal operation of the system, the exhaust pressure of the air compressor is from 0.1 to 0.7MPa, the capacity of the raw gas storage tank is 1.1 to 3 times of the capacity of the adsorption tower, and capacity of a desired raw gas source is 21 to 50 times of product gas quantities. The present invention can be used for providing breathing oxygen and medical care oxygen for constructors and workers as well as providing relevant industrial oxygen in high altitude areas, and has the advantages of simple device, easy adjustment, high automation degree, etc.
Description
Technical field
The present invention relates to a kind of pressure swing adsorption oxygen making device in air separation field, be specially adapted to the high altitude localities.
Background technology
Pressure swing adsorption is proposed by people such as Skarstrom the earliest, its ultimate principle is to utilize the difference of different components equilibrium adsorption capacity, rate of diffusion on sorbent material in the mixed gas and adsorptive capacity to increase, reduce with pressure the characteristic that reduces with the pressure rising, under pressurized conditions, finish the adsorption separation process of mixed gas, the gaseous fraction desorb that is adsorbed under the pressure-lowering condition, adsorbent reactivation, thus the separation and the sorbent circulation of each component of realization mixed gas are used.Eighties of last century is since the eighties, and pressure swing adsorption has obtained using widely in the gas delivery industry.As sorbent material, utilizing the pressure-swing adsorption process separation of air can produce concentration is about 95% oxygen with zeolite molecular sieve.According to the difference of working pressure range, pressure-swing adsorption process can be divided into two kinds:
(1) PSA flow process promptly has the absorption of pressure, normal pressure desorb flow process.General adsorptive pressure is 0.2～0.6MPa, adsorption bed desorb under the standard atmosphere pressure condition.This flow process is mainly used in the less separation of air oxygenerator of scale, and characteristics are that equipment is simple, but product recovery rate is low, energy consumption is higher.(2) VSA flow process, i.e. normal pressure absorption, vacuum desorption flow process.Adsorptive pressure is a normal pressure or a little more than barometric point, utilizes vacuum pump to vacuumize desorb.Be mainly used in larger gas separation unit, characteristics are product recovery rate height, and energy consumption is lower, but the equipment relative complex, the initial cost height.The barometric point of high altitude localities (refering in particular to height above sea level here above the area more than 4000 meters) is well below standard atmosphere pressure.Owing to be subjected to the influence of environmental stress, adopt the transformation fractionation by adsorption air oxygenerator of PSA flow process and VSA flow process often can not normally move or efficiently operation in the high altitude localities.But along with extensively carrying out of development of the West Regions and construction, grow with each passing day to the demand of oxygen in the high altitude localities.Therefore, be necessary to develop a kind of pressure swing adsorption oxygen making device that is applicable to the high altitude localities.
Summary of the invention
The object of the invention is to provide that a kind of equipment is simple, product recovery rate is high, energy consumption is lower, is applicable to the pressure swing adsorption oxygen making device of high altitude localities that being called has the pressure swing adsorption oxygen making device of pressing absorption low pressure desorb (being called for short LPSA) flow process.
A kind ofly be suitable for the pressure swing adsorption oxygen making device that the high altitude localities is used, by oil-free air compressor 1, air-cooler 2, adsorption tower 4, adsorption tower 5, product gas gas-holder 6, operated pneumatic valve 7,8,9,10,12,13,14, reducing valve 15, needle type valve 11, under meter 16, flow control valve 17 parts such as grade constitute, it is characterized in that being provided with in the device unstripped gas gas-holder 3, the effect of unstripped gas gas-holder 3 is a pressure of stablizing the adsorption bed outlet, store the compressor air-discharging in the pressure equalizing, reduce the influence of the fluctuation of product airshed and environmental stress device performance.Surpass area more than 4000 meters for height above sea level, because high altitude localities air rarefaction, system normally moves for assurance, the exhaust pressure of air compressor is 0.1～0.7Mpa, the volume of unstripped gas gas-holder is 1.1～3 times of adsorption tower volumetrical, and required raw material source of the gas capacity coupling is 21～50 times of product tolerance.
Whole prod making processes is: air enters air-cooler 2 coolings, the incoming stock gas gas-holder 3 of cooled gas after oil free compressor 1 compression.Pneumavalve 7,10 and 13 leaves, and valve 8,9,12,14 cuts out.This moment, adsorption tower 4 was in absorption phase, and adsorption tower 5 is in desorption phase.Enter adsorption tower 4 from the high pressure mixed gas of unstripped gas gas-holder 3 through valve 7, the adsorptive pressure in the adsorption tower is 0.2MPa～0.5MPa.In adsorption tower 4, the strong absorbed component-nitrogen in the unstripped gas is adsorbed the zeolite molecular sieve absorption in the tower.Weak absorbed component in the unstripped gas--oxygen is discharged from adsorption tower 4 outlets.Wherein a part enters product gas gas-holder 6 as product gas through pneumavalve 13, reducing valve 15.And another part oxygen reverse adsorption tower 5 that enters after needle type valve 11 step-downs that adsorption tower 4 produces cleans the molecular sieve bed that is in desorption state.The waste gas of the desorb of adsorption tower 5 directly is discharged in the surrounding environment through valve 10.Because the high altitude localities environmental stress is far below standard atmosphere pressure, this moment, adsorption tower 5 was equivalent to desorb under vacuum condition.Molecular sieve bed in adsorption tower 4 is near before saturated, and valve 7,8,9,10,13,14 cuts out, and valve 12 leaves.Adsorption tower 4 is finished absorption phase, and adsorption tower 5 is finished the desorption and regeneration stage.Subsequently, a part of gas in the adsorption tower 4 enters 5, two adsorption towers of adsorption tower through equalizing valve 12 and carries out pressure equalizing.Adsorption tower 4 pressure reduce, and adsorption tower 5 pressure raise, the oxygen components that recovery part mechanical energy and concentration are higher.In the pressure equalizing, two adsorption towers 4 and 5 all stop into unstripped gas.At this moment, the compressor expellant gas stores at unstripped gas gas-holder 3.After all the pressure stage finished, valve 8,9,14 left, and valve 7,10,12,13 cuts out, adsorption tower 4 decompression desorbs, adsorption tower 5 absorption of boosting.Before adsorption bed 5 reaches capacity, stop air inlet.Thereby finish a transformation sorption cycle cycle.Two adsorption towers are alternately finished absorption and desorption process just can produce oxygen continuously from the product end.Pressure in the absorption phase, adsorption tower is 0.2MPa～0.5MPa.Directly desorb under local barometric point (absolute pressure is less than 0.1MPa) condition did not adopt vacuum pump to vacuumize after adsorption tower reached capacity.When sea level elevation was 5000m, the desorption pressures of adsorption tower was (absolute pressure) about 0.05MPa.The product gas that obtains from the adsorption bed outlet enters product gas gas-holder 6 after reducing valve 15 decompressions.According to the actual needs, the oxygen concentration of product gas can be regulated between 80%-95%.
The present invention had both solved the problem that the source of the gas deficiency that the high altitude localities environment atmospheric pressure is low, air rarefaction caused and adsorptive pressure do not reach design load, made full use of the characteristics that subatmospheric helps the pressure-swing adsorption process desorb again, reached with vacuum pump and to vacuumize obtained effect.This pressure swing adsorption oxygen making device can be breathed and health care usefulness oxygen and relevant industrial oxygen for the construction of high altitude localities and staff provide, and has that equipment is simple, easy to adjust, the level of automation advantages of higher.
Description of drawings
Fig. 1 is a LPSA flow process making oxygen synoptic diagram.
Wherein: 1-compressor, 2-air-cooler, 3-unstripped gas gas-holder, 4, the 5-adsorption tower, 6-product gas gas-holder, 7,8,9,10,13, the 14-operated pneumatic valve, 12-equalizing valve, 15-reducing valve, 11-needle type valve, 16-under meter, 17-flow control valve
Embodiment
Embodiment 1, and air enters air-cooler 2 coolings after oil free compressor 1 compression.The incoming stock gas gas-holder 3 of cooled gas, the volume of unstripped gas gas-holder 3 are 1.2 times of adsorption tower volumetrical, and required raw material source of the gas capacity coupling is 25 times of product tolerance.Open pneumavalve 7,10 and 13, valve 8,9,12,14 cuts out, and this moment, adsorption tower 4 was in absorption phase, and adsorption tower 5 is in desorption phase.Enter adsorption tower 4 from the high pressure mixed gas of unstripped gas gas-holder 3 through valve 7, the adsorptive pressure in the adsorption tower is 0.2MPa.In adsorption tower 4, the strong absorbed component-nitrogen in the unstripped gas is adsorbed the zeolite molecular sieve absorption in the bed.Weak absorbed component-oxygen in the unstripped gas is discharged from the adsorption tower outlet.Wherein a part enters product gas gas-holder 6 as product gas through pneumavalve 13, reducing valve 15.And another part oxygen reverse adsorption tower 5 that enters after needle type valve 11 step-downs that adsorption tower 4 produces cleans the molecular sieve bed that is in desorption state.The waste gas of the desorb of adsorption tower 5 directly is discharged in the surrounding environment through valve 10.Molecular sieve bed in adsorption tower 4 is near before saturated, and valve 7,8,9,10,13,14 cuts out, and valve 12 leaves.Adsorption tower 4 is finished absorption phase, and adsorption tower 5 is finished the desorption and regeneration stage.Subsequently, a part of gas in the adsorption tower 4 enters 5, two adsorption towers of adsorption tower through equalizing valve 12 and carries out pressure equalizing.Adsorption tower 4 pressure reduce, and adsorption tower 5 pressure raise, the oxygen components that recovery part mechanical energy and concentration are higher.In the pressure equalizing, two adsorption towers 4 and 5 all stop into unstripped gas.At this moment, the compressor expellant gas stores at unstripped gas gas-holder 3.After all the pressure stage finished, valve 8,9,14 left, and valve 7,10,12,13 cuts out, adsorption tower 4 decompression desorbs, adsorption tower 5 absorption of boosting.Before adsorption bed 5 reaches capacity, stop air inlet.Thereby finish a transformation sorption cycle cycle.Two adsorption towers are alternately finished absorption and desorption process just can produce oxygen continuously from the product end.The product gas that obtains from the adsorption tower outlet enters product gas gas-holder 6 after the reducing valve decompression.According to actual needs, the oxygen concentration of product gas can be regulated between 80%-95%.
Embodiment 2, and air enters air-cooler 2 coolings after oil free compressor 1 compression.The incoming stock gas gas-holder 3 of cooled gas.The volume of unstripped gas gas-holder 3 is 1.5 times of adsorption tower volumetrical, and required raw material source of the gas capacity coupling is 30 times of product tolerance.Open pneumavalve 7,10 and 13, valve 8,9,12,14 cuts out.This moment, adsorption tower 4 was in absorption phase, and adsorption tower 5 is in desorption phase.Enter adsorption tower 4 from the high pressure mixed gas of unstripped gas gas-holder 3 through valve 7, the adsorptive pressure in the adsorption tower is 0.3MPa.In adsorption tower 4, the strong absorbed component-nitrogen in the unstripped gas is adsorbed the zeolite molecular sieve absorption in the tower.Weak absorbed component-oxygen in the unstripped gas is discharged from the adsorption tower outlet.Wherein a part enters product gas gas-holder 6 as product gas through pneumavalve 13, reducing valve 15.And another part oxygen reverse adsorption bed 5 that enters after needle type valve 11 step-downs that adsorption tower 4 produces cleans the molecular sieve bed that is in desorption state.The waste gas of the desorb of adsorption tower 5 directly is discharged in the surrounding environment through valve 10.Molecular sieve bed in adsorption tower 4 is near before saturated, and valve 7,8,9,10,13,14 cuts out, and valve 12 leaves.Adsorption tower 4 is finished absorption phase, and adsorption tower 5 is finished the desorption and regeneration stage.Subsequently, a part of gas in the adsorption tower 4 enters 5, two adsorption towers of adsorption tower through equalizing valve 12 and carries out pressure equalizing.Adsorption tower 4 pressure reduce, and adsorption tower 5 pressure raise, the oxygen components that recovery part mechanical energy and concentration are higher.In the pressure equalizing, two adsorption towers 4 and 5 all stop into unstripped gas.At this moment, the compressor expellant gas stores at unstripped gas gas-holder 3.After all the pressure stage finished, valve 8,9,14 left, and valve 7,10,12,13 cuts out, adsorption tower 4 decompression desorbs, adsorption tower 5 absorption of boosting.Before adsorption bed 5 reaches capacity, stop air inlet.Thereby finish a transformation sorption cycle cycle.Two adsorption towers are alternately finished absorption and desorption process just can produce oxygen continuously from the product end.The product gas that obtains from the adsorption tower outlet enters product gas gas-holder 6 after the reducing valve decompression.
Embodiment 3, and air enters air-cooler 2 coolings after oil free compressor 1 compression.The incoming stock gas gas-holder 3 of cooled gas.The volume of unstripped gas gas-holder 3 is 2 times of adsorption tower volumetrical, and required raw material source of the gas capacity coupling is 40 times of product tolerance.Open pneumavalve 7,10 and 13, valve 8,9,12,14 cuts out.This moment, adsorption tower 4 was in absorption phase, and adsorption tower 5 is in desorption phase.Enter adsorption tower 4 from the high pressure mixed gas of unstripped gas gas-holder 3 through valve 7, the adsorptive pressure in the adsorption tower is 0.5MPa.In adsorption tower 4, the strong absorbed component-nitrogen in the unstripped gas is adsorbed the zeolite molecular sieve absorption in the bed.Weak absorbed component-oxygen in the unstripped gas is discharged from the adsorption tower outlet.Wherein a part enters product gas gas-holder 6 as product gas through pneumavalve 13, reducing valve 15.And another part oxygen reverse adsorption tower 5 that enters after needle type valve 11 step-downs that adsorption tower 4 produces cleans the molecular sieve bed that is in desorption state.The waste gas of the desorb of adsorption tower 5 directly is discharged in the surrounding environment through valve 10.Molecular sieve bed in adsorption tower 4 is near before saturated, and valve 7,8,9,10,13,14 cuts out, and valve 12 leaves.Adsorption tower 4 is finished absorption phase, and adsorption tower 5 is finished the desorption and regeneration stage.Subsequently, a part of gas in the adsorption tower 4 enters 5, two adsorption towers of adsorption tower through equalizing valve 12 and carries out pressure equalizing.Adsorption tower 4 pressure reduce, and adsorption tower 5 pressure raise, the oxygen components that recovery part mechanical energy and concentration are higher.In the pressure equalizing, two adsorption towers 4 and 5 all stop into unstripped gas.At this moment, the compressor expellant gas stores at unstripped gas gas-holder 3.After all the pressure stage finished, valve 8,9,14 left, and valve 7,10,12,13 cuts out, adsorption tower 4 decompression desorbs, adsorption tower 5 absorption of boosting.Before adsorption bed 5 reaches capacity, stop air inlet.Thereby finish a transformation sorption cycle cycle.Two adsorption towers are alternately finished absorption and desorption process just can produce oxygen continuously from the product end.The product gas that obtains from the adsorption tower outlet enters product gas gas-holder 6 after the reducing valve decompression.
Embodiment 4, and air enters air-cooler 2 coolings after oil free compressor 1 compression.The incoming stock gas gas-holder 3 of cooled gas.The volume of unstripped gas gas-holder 3 is 3 times of adsorption tower volumetrical, and required raw material source of the gas capacity coupling is 50 times of product tolerance.Open pneumavalve 7,10 and 13, valve 8,9,12,14 cuts out.This moment, adsorption tower 4 was in absorption phase, and adsorption tower 5 is in desorption phase.Enter adsorption tower 4 from the high pressure mixed gas of unstripped gas gas-holder 3 through valve 7, the adsorptive pressure in the adsorption tower is 0.5MPa.In adsorption tower 4, the strong absorbed component-nitrogen in the unstripped gas is adsorbed the zeolite molecular sieve absorption in the bed.Weak absorbed component-oxygen in the unstripped gas is discharged from the adsorption tower outlet.Wherein a part enters product gas gas-holder 6 as product gas through pneumavalve 13, reducing valve 15.And another part oxygen reverse adsorption tower 5 that enters after needle type valve 11 step-downs that adsorption tower 4 produces cleans the molecular sieve bed that is in desorption state.The waste gas of the desorb of adsorption tower 5 directly is discharged in the surrounding environment through valve 10.Molecular sieve bed in adsorption tower 4 is near before saturated, and valve 7,8,9,10,13,14 cuts out, and valve 12 leaves.Adsorption tower 4 is finished absorption phase, and adsorption tower 5 is finished the desorption and regeneration stage.Subsequently, a part of gas in the adsorption tower 4 enters 5, two adsorption towers of adsorption tower through equalizing valve 12 and carries out pressure equalizing.Adsorption tower 4 pressure reduce, and adsorption tower 5 pressure raise, the oxygen components that recovery part mechanical energy and concentration are higher.In the pressure equalizing, two adsorption towers 4 and 5 all stop into unstripped gas.At this moment, the compressor expellant gas stores at unstripped gas gas-holder 3.After all the pressure stage finished, valve 8,9,14 left, and valve 7,10,12,13 cuts out, adsorption tower 4 decompression desorbs, adsorption tower 5 absorption of boosting.Before adsorption bed 5 reaches capacity, stop air inlet.Thereby finish a transformation sorption cycle cycle.Two adsorption towers are alternately finished absorption and desorption process just can produce oxygen continuously from the product end.The product gas that obtains from the adsorption tower outlet enters product gas gas-holder 6 after the reducing valve decompression.
Claims (1)
1. one kind is suitable for the pressure swing adsorption oxygen making device that the high altitude localities is used, by oil-free air compressor (1), air-cooler (2), adsorption tower (4), adsorption tower (5), product gas gas-holder (6), operated pneumatic valve (7), (8), (9), (10), (12), (13), (14), reducing valve (15), needle type valve (11), under meter (16), flow control valve parts such as (17) constitute, it is characterized in that being provided with in the device unstripped gas gas-holder (3), the effect of unstripped gas gas-holder (3) is a pressure of stablizing the adsorption bed outlet, store the compressor air-discharging in the pressure equalizing, reduce the influence of the fluctuation of product airshed and environmental stress device performance; The exhaust pressure of air compressor (1) is 0.1～0.7MPa, the volume of unstripped gas gas-holder (3) is 1.1～3 times of adsorption tower volumetrical, pressure in the absorption phase, adsorption tower is the required raw material source of the gas capacity coupling of 0.2MPa～0.5MPa 21～50 times for product tolerance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200310122470 CN1228128C (en) | 2003-12-25 | 2003-12-25 | Variable pressure adsorptive oxygen making device suitable for high altitude area |
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| CN 200310122470 CN1228128C (en) | 2003-12-25 | 2003-12-25 | Variable pressure adsorptive oxygen making device suitable for high altitude area |
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| CN1228128C true CN1228128C (en) | 2005-11-23 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2755910B1 (en) * | 2011-09-13 | 2020-05-20 | Koninklijke Philips N.V. | Portable oxygen concentrator |
| CN110750753B (en) * | 2019-10-21 | 2023-08-22 | 中国人民解放军陆军军医大学 | Method for estimating oxygen demand of large-scale crowd entering high-altitude area |
| CN110980651A (en) * | 2019-12-27 | 2020-04-10 | 广西珂深威医疗科技有限公司 | Oxygen generation system based on bidirectional complementary oxygen pressure equalization |
| CN111847388A (en) * | 2020-06-19 | 2020-10-30 | 华中科技大学同济医学院附属同济医院 | Pressure swing adsorption oxygenerator |
| CN111659228B (en) * | 2020-06-30 | 2022-05-06 | 佛山市美客医疗科技有限公司 | Working method of pressure swing adsorption oxygen equipment |
| CN112516749B (en) * | 2020-06-30 | 2022-07-05 | 上海海尔医疗科技有限公司 | Pressure swing adsorption oxygen equipment |
| CN114949647A (en) * | 2022-06-06 | 2022-08-30 | 北京航空航天大学 | System and method for extracting oxygen to prepare respiratory gas |
| CN115228240B (en) * | 2022-07-20 | 2023-04-18 | 广西珂深威医疗科技有限公司 | Oxygen generation system and oxygen generation method suitable for low-oxygen-concentration purification in multiple scenes |
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