CN103950896A - Method for producing multi-concentration oxygen-rich gas by pressure swing adsorption without reversing valve - Google Patents
Method for producing multi-concentration oxygen-rich gas by pressure swing adsorption without reversing valve Download PDFInfo
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- CN103950896A CN103950896A CN201410205182.6A CN201410205182A CN103950896A CN 103950896 A CN103950896 A CN 103950896A CN 201410205182 A CN201410205182 A CN 201410205182A CN 103950896 A CN103950896 A CN 103950896A
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Abstract
The invention relates to a method for producing multi-concentration oxygen-rich gas by pressure swing adsorption without a reversing valve. A compressor is increased in an air inlet pipe of a separating rotary drum in a vacuum pressure swing adsorption separator, a vacuum pump is increased in a nitrogen-rich exhaust pipe, a computer is utilized, the rotational speed of the compressor and the start and stop of the compressor and the vacuum pump are controlled through a control module and the rotational speed of a motor is controlled by the control module so as to control the rotational speed of a molecular sieve cylinder, further control the time of adsorbing and resolving nitrogen of a molecular sieve in the molecular sieve cylinder and finally control the concentration and the flow rate of the oxygen-rich gas exhausted from an oxygen-rich exhaust pipe. The method is characterized in that the decision of the concentration and the flow rate of the oxygen-rich gas exhausted from the oxygen-rich exhaust pipe is related with the rotational speed of the compressor, the rotational speed of the molecular sieve cylinder and the filling density of the molecular sieve.
Description
Technical field
The present invention relates to the method without many kind concentration rich oxygen airs of reversing valve production by pressure swing adsorption body, be applicable to all Vacuum Pressure Swing Adsorption separation systems, belong to gas separation technique field.
Background technology
Very ripe for producing the Vacuum Pressure Swing Adsorption isolation technique of oxygen rich gas, but this technology has a shortcoming, that is exactly that it needs a plurality of reversing valves, and the commutating frequency of reversing valve is very high, substantially be to commutate once for tens seconds, commutation work for such high frequency time, the domestic neither one producer that goes back can produce quality reversing valve really up to the mark, external reversing valve also unavoidably often goes wrong, the weakness that is to say Vacuum Pressure Swing Adsorption isolation technique is reversing valve, the present invention is the separated rotating cylinder > > utilizing in uncle minister in ancient times's Wei patent of invention < < 201410193438.6 Vacuum Pressure Swing Adsorption separators, the method of oxygen-rich gases with multiple kinds of concentration body is produced in design.
Summary of the invention
The object of this invention is to provide a kind of method without many kind concentration rich oxygen airs of reversing valve production by pressure swing adsorption body of not using reversing valve.
Method without many kind concentration rich oxygen airs of reversing valve production by pressure swing adsorption body, the gas inlet pipe that is included in the separated rotating cylinder in Vacuum Pressure Swing Adsorption separator installs a compressor additional, at rich nitrogen extraction pipe, install a vacuum pump additional, utilize a computer, pass through control module, control compressor rotary speed, with compressor and vacuum priming of pump, stop, and the speed of rotation of being controlled motor by control module is to control the speed of rotation of molecular sieve drum, thereby the time of the molecular sieve adsorption in control molecular sieve drum and parsing nitrogen, final concentration and the flow of controlling the oxygen rich gas from discharging in oxygen enrichment vapor pipe, it is characterized in that:
1, determine the concentration and flow, relevant with the tamped density of molecular sieve with the speed of rotation of compressor rotary speed, molecular sieve drum of the oxygen rich gas of discharging in oxygen enrichment vapor pipe, when the lower oxygen rich gas concentration of needs, the tamped density of molecular sieve is reduced, strengthen pressurized air in the speed of flowing through of molecular sieve zone, suitably strengthen the rotating speed of compressor, and suitably strengthen the speed of rotation of molecular sieve drum, thereby make air with the higher flow velocity molecular sieve of flowing through, so that the air being pressed into from compressor is reduced by the ratio of molecular sieve adsorption nitrogen, and then the concentration that makes the oxygen rich gas of discharging in oxygen enrichment vapor pipe reduces but flow increases, within the scope of certain pressure, strengthen the rotating speed of compressor, strengthen the pressure of compressor outlet air, can be conducive to molecular sieve adsorption nitrogen, so the speed of rotation of compressor can not increase too large, so main or dependence strengthens the speed of rotation of molecular sieve drum, to reduce pressurized air, flow through time of molecular sieve, thereby reduce air by the ratio of molecular sieve adsorption nitrogen, make the oxygen rich gas of discharging in oxygen enrichment vapor pipe leave more nitrogen, the concentration of its oxygen rich gas just must reduce, when the higher oxygen rich gas concentration of needs, increase molecular sieve tamped density, reduce pressurized air the speed of flowing through of molecular sieve zone, suitably reduce compressor rotating speed, and suitably reduce the speed of rotation of molecular sieve drum, thereby make air with the lower flow velocity molecular sieve of flowing through, so that the air being pressed into from compressor increased by the ratio of molecular sieve adsorption nitrogen, and then the concentration of the oxygen rich gas of discharging in oxygen enrichment vapor pipe is increased but flow reduces, when controlling the concentration of the oxygen rich gas from discharging in oxygen enrichment vapor pipe, the speed of rotation of molecular sieve drum is the most key, at the pressure one of compressor compresses air regularly,, ratio that nitrogen be adsorbed shorter by the time of molecular sieve adsorption also less, the final nitrogen ratios concentration larger, oxygen rich gas containing from the oxygen rich gas of discharging in oxygen enrichment vapor pipe is also just less the duration of contact of shorter, each nitrogen molecule of the speed of rotation time faster, that pressurized air is flowed through molecular sieve zone of molecular sieve drum and molecular sieve, at the pressure one of compressor compresses air regularly, the duration of contact of longer, each nitrogen molecule of the speed of rotation time slower, that pressurized air is flowed through molecular sieve zone of molecular sieve drum and molecular sieve, ratio that nitrogen be adsorbed longer by the time of molecular sieve adsorption also larger, the final nitrogen ratios concentration less, oxygen rich gas containing from the oxygen rich gas of discharging in oxygen enrichment vapor pipe is also just larger, when needing the oxygen rich gas of low concentration, need to reduce the tamped density of molecular sieve, its objective is in order to increase pressurized air in the speed of flowing through of molecular sieve zone, to reduce the average contact time of nitrogen molecule and molecular sieve in pressurized air, thereby reduce the ratio of molecular sieve adsorption nitrogen, when needing the oxygen rich gas of higher concentration, need to strengthen the tamped density of molecular sieve, its objective is in order to reduce pressurized air in the speed of flowing through of molecular sieve zone, to strengthen the average contact time of nitrogen molecule and molecular sieve in pressurized air, thereby strengthen the ratio of molecular sieve adsorption nitrogen, for same set of equipment, the tamped density of molecular sieve is larger, the speed of rotation of molecular sieve drum is less, the oxygen rich gas concentration of its production just larger, oxygen enrichment flow is also just less, for same set of equipment, the tamped density of molecular sieve is less, the speed of rotation of molecular sieve drum is larger, the oxygen rich gas concentration of its production just less, oxygen enrichment flow is also just larger.
2, the separated rotating cylinder in Vacuum Pressure Swing Adsorption separator, comprises the P district, air inlet district of left end, the Q district, molecular sieve zone of centre and the oxygen enrichment collecting region Zone R of right-hand member.
(A), P district, air inlet district comprises gas inlet pipe, blowback air outlet pipe, intake hood and air inlet distribution plate, air inlet distribution plate is divided into air inlet sector, the rich nitrogen zone of transition that corresponding sector, blowback air give vent to anger sector and form between them of bleeding, air inlet sector is connected with gas inlet pipe, but with other separate from, the blowback air sector of giving vent to anger is connected with blowback air outlet pipe, but separating from, the rich nitrogen corresponding sector of bleeding with other is independent blind area, all isolates with other districts; The fan angle of air inlet sector is, the bleed fan angle of corresponding sector of rich nitrogen is β, the give vent to anger fan angle of sector of blowback air is α, the bleed fan angle of the zone of transition between corresponding sector of air inlet sector and rich nitrogen is δ, the give vent to anger fan angle of zone of transition of sector of air inlet sector and blowback air is δ, and rich nitrogen the give vent to anger fan angle of zone of transition of sector of corresponding sector and blowback air of bleeding is δ.
(B), middle Q district, molecular sieve zone comprises molecular sieve drum, follow-up pulley, motor, motion-work wheel, molecular sieve drum be take cylinder central shaft and is become a plurality of shapes as symmetry division, the fan section that size is identical, fan angle is Ω, all there is the sheet rubber the same with fan-shaped division plate width at each fan-shaped division plate two ends, the length of sheet rubber is 5mm ~ 30mm, the air inlet sector of the length of the sheet rubber of molecular sieve drum left end and left end, the rich nitrogen corresponding sector of bleeding, blowback air is given vent to anger sector and the zone of transition that forms between them matches, the gas barrier in Bing Nengshige district and can not enter other regions, the rich nitrogen of the length of the sheet rubber of molecular sieve drum right-hand member and the right-hand member sector of bleeding, oxygen enrichment exhaust sector, blowback air air inlet sector and the zone of transition forming between them match, the gas barrier in Bing Nengshige district and can not enter other regions, direction the place ahead one side of sheet rubber paramagnetic molecule screen drum rotation has an inclined-plane, make the air inlet sector of its its left end of swiping, the rich nitrogen corresponding sector of bleeding, blowback air is given vent to anger sector and during the end face of the zone of transition that forms between them, or each the rich nitrogen of its right-hand member of the swiping sector of bleeding, oxygen enrichment exhaust sector, during the end face of blowback air air inlet sector and the zone of transition that forms between them, the contact surface of sheet rubber and these sector end faces is larger, thereby can form the more scraping of sealing with these sector end faces, and then can meet the air that is blown into lower pressure, the blowback air of lower pressure and compared with the sealing of the condition that vacuumizes of low vacuum, molecular sieve drum can rotate around molecular sieve drum central shaft, under molecular sieve drum downside, there is a follow-up pulley, follow-up pulley is spool gear, follow-up pulley periphery has the gear teeth, molecular sieve drum periphery has the gear teeth, the gear teeth of molecular sieve drum periphery match and are meshed with the gear teeth of follow-up pulley periphery, the gear teeth of follow-up pulley periphery are meshed with the gear teeth of motion-work wheel again, motion-work wheel is connected with motor shaft, by driven by motor motion-work wheel, rotated, motion-work wheel drives follow-up pulley rotation, and follow-up pulley drives molecular sieve drum rotation again, and the circular frequency of molecular sieve drum rotation is Vo/ second, there are a plurality of uniform bogie wheels the central shaft both sides of follow-up pulley, the weight of a plurality of bogie wheel supporting molecular sieve drums.
(C), oxygen enrichment collecting region Zone R comprises oxygen enrichment vapor pipe, blowback air inlet tube, rich nitrogen extraction pipe, air leaving cover and the distribution plate of giving vent to anger, the distribution plate of giving vent to anger is divided into the zone of transition that rich nitrogen is bled sector, oxygen enrichment exhaust sector, blowback air air inlet sector and formed between them, the rich nitrogen sector of bleeding is connected with rich nitrogen extraction pipe, but with other separate from, oxygen enrichment exhaust sector is connected with oxygen enrichment vapor pipe, but with other separate from, blowback air air inlet sector is connected with blowback air inlet tube, but with other separate from; The fan angle of oxygen enrichment exhaust sector is, the bleed fan angle of sector of rich nitrogen is β, the fan angle of blowback air air inlet sector is α, the bleed fan angle of zone of transition of sector and oxygen enrichment exhaust sector of rich nitrogen is δ, the fan angle of the zone of transition of oxygen enrichment exhaust sector and blowback air air inlet sector is δ, and the bleed fan angle of zone of transition of sector and blowback air air inlet sector of rich nitrogen is δ.
(D), rich nitrogen is bled time β/Vo(second of molecular sieve adsorption nitrogen in fan angle β/molecular sieve drum angular velocity of rotation Vo/ second=same fan section of sector), the molecular sieve in fan angle/molecular sieve drum angular velocity of rotation Vo/ second=same fan section of oxygen enrichment exhaust sector is resolved time/Vo(second of nitrogen), molecular sieve blowback time α/Vo(second in fan angle alpha/molecular sieve drum angular velocity of rotation Vo/ second=same fan section of blowback air air inlet sector), according to the characteristic of molecular sieve, determine parameter beta/Vo, / Vo, α/Vo, the concentration parameter of the oxygen rich gas of producing with customer requirement, calculate molecular sieve drum angular velocity of rotation Vo/ second, fan angle with oxygen enrichment exhaust sector, the bleed fan angle β of sector of rich nitrogen, the fan angle alpha of blowback air air inlet sector, rich nitrogen the bleed pass of the interior molecular sieve fan section fan angle Ω of fan angle δ, these three δ angles and molecular sieve drum of zone of transition of sector and blowback air air inlet sector of fan angle δ, the rich nitrogen of zone of transition of fan angle δ, oxygen enrichment exhaust sector and blowback air air inlet sector of zone of transition of sector and oxygen enrichment exhaust sector of bleeding is: 2 Ω≤δ.
(E), the air inlet sector of air inlet distribution plate is relative with the oxygen enrichment vent fan zone position of the distribution plate of giving vent to anger, make the air with certain pressure being blown into from gas inlet pipe, enter into behind air inlet sector, the molecular sieve of the molecular sieve sector through being connected with air inlet sector contacts, most nitrogen wherein by molecular sieve adsorption after, remaining oxygen rich gas enters into oxygen enrichment vapor pipe from oxygen enrichment exhaust sector, then be transported to the device that uses oxygen rich gas, in each fan molecular sieve drum, molecular sieve sector is through the time in the region between air inlet sector and oxygen enrichment exhaust sector, be the time of the molecular sieve adsorption nitrogen in this sector, the rich nitrogen of the air inlet distribution plate corresponding sector of bleeding is relative with the rich nitrogen exhaust fan zone position of the distribution plate of giving vent to anger, make from the air inlet sector of absorption nitrogen and the area of space between oxygen enrichment exhaust sector, rotate to rich nitrogen and bleed corresponding sector and rich nitrogen while bleeding area of space between sector, the nitrogen of molecular sieve drum internal adsorption by vacuum pump through the rich nitrogen sector of bleeding, from rich nitrogen extraction pipe, extract out, in each fan molecular sieve drum, bleed time in the region between sector through bleed corresponding sector and rich nitrogen of rich nitrogen in molecular sieve sector, be the time of the molecular sieve parsing nitrogen in this sector, the blowback air of the air inlet distribution plate sector of giving vent to anger is relative with the blowback air supply fan zone position of the distribution plate of giving vent to anger, make from rich nitrogen bleed corresponding sector and rich nitrogen bleed area of space between sector, when rotating to blowback air and giving vent to anger area of space between sector and blowback air air inlet sector, molecular sieve after resolved is by blowback, in each fan molecular sieve drum molecular sieve sector through blowback air give vent to anger the region between sector and blowback air air inlet sector time, be the molecular sieve blowback time in this sector.
The present invention compared with prior art has the following advantages:
1. do not use reversing valve not only to reduce and account for total cost of equipment than the investment cost of the reversing valve over 30%, but also reduced because of the breakdown maintenance of reversing valve and the loss that stops production and bring.
2. can produce according to client's Demand Design the oxygen rich gas of different concns, the parameter of its major effect oxygen rich gas concentration and flow comprises the tamped density of molecular sieve and the speed of rotation of molecular sieve drum; For same set of equipment, the tamped density of molecular sieve is larger, the speed of rotation of molecular sieve drum is less, the oxygen rich gas concentration of its production just larger, oxygen enrichment flow is also just less; For same set of equipment, the tamped density of molecular sieve is less, the speed of rotation of molecular sieve drum is larger, the oxygen rich gas concentration of its production just less, oxygen enrichment flow is also just larger.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the embodiment of the present invention;
Fig. 2 is AA diagrammatic cross-section embodiment illustrated in fig. 1;
Fig. 3 is BB diagrammatic cross-section embodiment illustrated in fig. 1;
Fig. 4 is CC diagrammatic cross-section embodiment illustrated in fig. 1.
In Fig. 1-4: 1, gas inlet pipe 2, blowback air outlet pipe 3, intake hood 4, air inlet distribution plate 5, molecular sieve drum 6, follow-up pulley 7, motor 8, motion-work wheel 9, the distribution plate 10 of giving vent to anger, air leaving cover 11, oxygen enrichment vapor pipe 12, blowback air inlet tube 13, rich nitrogen extraction pipe 14, the zone of transition 15 of bleeding between corresponding sector with rich nitrogen in air inlet sector, the rich nitrogen corresponding sector 16 of bleeding, air inlet sector 17, air inlet distribution plate central shaft 18, the give vent to anger zone of transition 19 of sector of air inlet sector and blowback air, the blowback air sector 20 of giving vent to anger, rich nitrogen the give vent to anger zone of transition 21 of sector of corresponding sector and blowback air of bleeding, molecular sieve sector 22, bogie wheel 23, drive sprocket axle 24, molecular sieve drum central shaft 25, the bleed zone of transition 26 of sector and oxygen enrichment exhaust sector of rich nitrogen, the rich nitrogen sector 27 of bleeding, oxygen enrichment exhaust sector 28, the distribution plate central shaft 29 of giving vent to anger, the zone of transition 30 of oxygen enrichment exhaust sector and blowback air air inlet sector, blowback air air inlet sector 31, the bleed zone of transition 32 of sector and blowback air air inlet sector of rich nitrogen, compressor 33, control module 34, vacuum pump 35, control computer 36, general supply.
Embodiment
In the embodiment shown in Fig. 1-4: without the method for many kind concentration rich oxygen airs of reversing valve production by pressure swing adsorption body, the gas inlet pipe 1 that is included in the separated rotating cylinder in Vacuum Pressure Swing Adsorption separator installs a compressor 32 additional, at rich nitrogen extraction pipe 13, install a vacuum pump 34 additional, utilize one to control computer 35, by control module 33, control compressor 32 rotating speeds, with the starting of compressor 32 with vacuum pump 34, stop, and the speed of rotation of being controlled motor 7 by control module 33 is to control the speed of rotation of molecular sieve drum 5, thereby control molecular sieve adsorption and the time of resolving nitrogen in molecular sieve drum 5, final control from concentration and the flow of the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges, it is characterized in that:
1, determine from the concentration of the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges and flow, relevant with the tamped density of molecular sieve with compressor 32 rotating speeds, the speed of rotation of molecular sieve drum 5, when the lower oxygen rich gas concentration of needs, the tamped density of molecular sieve is reduced, strengthen pressurized air in the speed of flowing through of molecular sieve zone, suitably strengthen the rotating speed of compressor 32, and suitably strengthen the speed of rotation of molecular sieve drum 5, thereby make air with the higher flow velocity molecular sieve of flowing through, so that the air being pressed into from compressor 32 is reduced by the ratio of molecular sieve adsorption nitrogen, and then make to reduce but flow increases from the concentration of the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges, within the scope of certain pressure, strengthen the rotating speed of compressor 32, strengthen the pressure of compressor 32 outlet airs, can be conducive to molecular sieve adsorption nitrogen, the speed of rotation of compressor 32 can not increase too large, so main or dependence strengthens the speed of rotation of molecular sieve drum 5, to reduce pressurized air, flow through time of molecular sieve, thereby reduce air by the ratio of molecular sieve adsorption nitrogen, make to leave more nitrogen from the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges, the concentration of its oxygen rich gas just must reduce, when the higher oxygen rich gas concentration of needs, increase molecular sieve tamped density, reduce pressurized air the speed of flowing through of molecular sieve zone, suitably reduce compressor 32 rotating speed, and suitably reduce the speed of rotation of molecular sieve drum 5, thereby make air with the lower flow velocity molecular sieve of flowing through, so that the air being pressed into from compressor 32 increased by the ratio of molecular sieve adsorption nitrogen, and then make to increase but flow reduces from the concentration of the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges, when the concentration of controlling from the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges, the speed of rotation of molecular sieve drum 5 is the most key, at the compressed-air actuated pressure of compressor 32 one regularly,, ratio that nitrogen be adsorbed shorter by the time of molecular sieve adsorption also less, the final nitrogen ratios containing from the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges concentration larger, oxygen rich gas is also just less the duration of contact of shorter, each nitrogen molecule of the speed of rotation time faster, that pressurized air is flowed through molecular sieve zone of molecular sieve drum 5 and molecular sieve, at the compressed-air actuated pressure of compressor 32 one regularly, the duration of contact of longer, each nitrogen molecule of the speed of rotation time slower, that pressurized air is flowed through molecular sieve zone of molecular sieve drum 5 and molecular sieve longer by the time of molecular sieve adsorption, also larger, the final nitrogen ratios containing from the oxygen rich gas of oxygen enrichment vapor pipe 11 interior discharges concentration less, oxygen rich gas is also just larger for ratio that nitrogen is adsorbed, when needing the oxygen rich gas of low concentration, need to reduce the tamped density of molecular sieve, its objective is in order to increase pressurized air in the speed of flowing through of molecular sieve zone, to reduce the average contact time of nitrogen molecule and molecular sieve in pressurized air, thereby reduce the ratio of molecular sieve adsorption nitrogen, when needing the oxygen rich gas of higher concentration, need to strengthen the tamped density of molecular sieve, its objective is in order to reduce pressurized air in the speed of flowing through of molecular sieve zone, to strengthen the average contact time of nitrogen molecule and molecular sieve in pressurized air, thereby strengthen the ratio of molecular sieve adsorption nitrogen, for same set of equipment, the tamped density of molecular sieve is larger, the speed of rotation of molecular sieve drum 5 is less, the oxygen rich gas concentration of its production just larger, oxygen enrichment flow is also just less, for same set of equipment, the tamped density of molecular sieve is less, the speed of rotation of molecular sieve drum 5 is larger, the oxygen rich gas concentration of its production just less, oxygen enrichment flow is also just larger.
2, the separated rotating cylinder in Vacuum Pressure Swing Adsorption separator, comprises the P district, air inlet district of left end, the Q district, molecular sieve zone of centre and the oxygen enrichment collecting region Zone R of right-hand member.
P district, air inlet district comprises gas inlet pipe 1, blowback air outlet pipe 2, intake hood 3 and air inlet distribution plate 4, air inlet distribution plate 4 is divided into air inlet sector 16, the rich nitrogen zone of transition that corresponding sector 15, blowback air give vent to anger sector 19 and form between them of bleeding, air inlet sector 16 is connected with gas inlet pipe 1, but with other separate from, the blowback air sector 19 of giving vent to anger is connected with blowback air outlet pipe 2, but with other separate from, rich nitrogen is bled corresponding sector 15 for independent blind area, all isolates with other districts; The fan angle of air inlet sector 16 is, the bleed fan angle of corresponding sector 15 of rich nitrogen is β, the give vent to anger fan angle of sector 19 of blowback air is α, the bleed fan angle of zone of transition of 15 of corresponding sectors of air inlet sector 16 and rich nitrogen is δ, the give vent to anger fan angle of zone of transition of sector 19 of air inlet sector 16 and blowback air is δ, and rich nitrogen the give vent to anger fan angle of zone of transition of sector 19 of corresponding sector 15 and blowback air of bleeding is δ.
Middle Q district, molecular sieve zone comprises molecular sieve drum 5, follow-up pulley 6, motor 7, motion-work wheel 8, molecular sieve drum 5 be take cylinder central shaft and is become a plurality of shapes as symmetry division, the fan section that size is identical, fan angle is Ω, all there is the sheet rubber the same with fan-shaped division plate width at each fan-shaped division plate two ends, the length of sheet rubber is 5mm ~ 30mm, the length of the sheet rubber of molecular sieve drum 5 left ends and the air inlet sector 16 of left end, the rich nitrogen corresponding sector 15 of bleeding, blowback air is given vent to anger sector 19 and the zone of transition that forms between them matches, the gas barrier in Bing Nengshige district and can not enter other regions, the length of the sheet rubber of molecular sieve drum 5 right-hand members and the rich nitrogen of the right-hand member sector 26 of bleeding, oxygen enrichment exhaust sector 27, blowback air air inlet sector 30 and the zone of transition forming between them match, the gas barrier in Bing Nengshige district and can not enter other regions, direction the place ahead one side of sheet rubber paramagnetic molecule screen drum 5 rotations has an inclined-plane, make the air inlet sector 16 of its its left end of swiping, the rich nitrogen corresponding sector 15 of bleeding, blowback air is given vent to anger sector 19 and during the end face of the zone of transition that forms between them, or each the rich nitrogen of its right-hand member of the swiping sector 26 of bleeding, oxygen enrichment exhaust sector 27, during the end face of blowback air air inlet sector 30 and the zone of transition that forms between them, the contact surface of sheet rubber and these sector end faces is larger, thereby can form the more scraping of sealing with these sector end faces, and then can meet the air that is blown into lower pressure, the blowback air of lower pressure and compared with the sealing of the condition that vacuumizes of low vacuum, molecular sieve drum 5 can be around molecular sieve drum 5 central shaft rotations, under molecular sieve drum 5 downsides, there is a follow-up pulley 6, follow-up pulley 6 is spool gear, follow-up pulley 6 peripheries have the gear teeth, molecular sieve drum 5 peripheries have the gear teeth, the gear teeth of molecular sieve drum 5 peripheries match and are meshed with the gear teeth of follow-up pulley 6 peripheries, the gear teeth of follow-up pulley 6 peripheries are meshed with the gear teeth of motion-work wheel 8 again, motion-work wheel 8 is connected with motor 7 axles, by motor 7, drive motion-work wheel 8 rotations, motion-work wheel 8 drives follow-up pulley 6 rotations, and follow-up pulley 6 drives molecular sieve drum 5 rotations again, and the circular frequency of molecular sieve drum 5 rotations is Vo/ second, there are a plurality of uniform bogie wheels 22 the central shaft both sides of follow-up pulley 6, the weight of a plurality of bogie wheel 22 supporting molecular sieve drums 5.
Oxygen enrichment collecting region Zone R comprises oxygen enrichment vapor pipe 11, blowback air inlet tube 12, rich nitrogen extraction pipe 13, air leaving cover 10 and the distribution plate 9 of giving vent to anger, the distribution plate 9 of giving vent to anger is divided into the zone of transition that rich nitrogen is bled sector 26, oxygen enrichment exhaust sector 27, blowback air air inlet sector 30 and formed between them, the rich nitrogen sector 26 of bleeding is connected with rich nitrogen extraction pipe 13, but with other separate from, oxygen enrichment exhaust sector 27 is connected with oxygen enrichment vapor pipe 11, but with other separate from, blowback air air inlet sector 30 is connected with blowback air inlet tube 12, but with other separate from; The fan angle of oxygen enrichment exhaust sector 27 is, the bleed fan angle of sector 26 of rich nitrogen is β, the fan angle of blowback air air inlet sector 30 is α, the rich nitrogen sector 26 of bleeding is δ with the fan angle of the zone of transition of oxygen enrichment exhaust sector 27, oxygen enrichment exhaust sector 27 is δ with the fan angle of the zone of transition of blowback air air inlet sector 30, and the rich nitrogen sector 26 of bleeding is δ with the fan angle of the zone of transition of blowback air air inlet sector 30.
Rich nitrogen is bled time β/Vo(second of molecular sieve adsorption nitrogen in fan angle β/molecular sieve drum 5 angular velocity of rotation Vo/ second=same fan sections of sector 26), the molecular sieve in fan angle/molecular sieve drum 5 angular velocity of rotation Vo/ second=same fan sections of oxygen enrichment exhaust sector 27 is resolved time/Vo(second of nitrogen), molecular sieve blowback time α/Vo(second in fan angle alpha/molecular sieve drum 5 angular velocity of rotation Vo/ second=same fan sections of blowback air air inlet sector 30), according to the characteristic of molecular sieve, determine parameter beta/Vo, / Vo, α/Vo, the concentration parameter of the oxygen rich gas of producing with customer requirement, calculate 5 angular velocity of rotation Vo/ seconds of molecular sieve drum, fan angle with oxygen enrichment exhaust sector 27, the bleed fan angle β of sector 26 of rich nitrogen, the fan angle alpha of blowback air air inlet sector 30, rich nitrogen fan angle δ, oxygen enrichment exhaust sector 27 and fan angle δ, the rich nitrogen of the zone of transition of blowback air air inlet sector 30 of sector 26 and the zone of transition of oxygen enrichment exhaust sector 27 sector 26 of bleeding of bleeding with the pass of fan angle δ, these three δ angles and the interior molecular sieve of the molecular sieve drum 5 fan section fan angle Ω of the zone of transition of blowback air air inlet sector 30 is: 2 Ω≤δ.
The air inlet sector 16 of air inlet distribution plate 4 is relative with 27 positions, oxygen enrichment exhaust sector of the distribution plate 9 of giving vent to anger, make the air with certain pressure being blown into from gas inlet pipe 1, enter into behind air inlet sector 16, the molecular sieve of the molecular sieve sector through being connected with air inlet sector 16 contacts, most nitrogen wherein by molecular sieve adsorption after, remaining oxygen rich gas enters into oxygen enrichment vapor pipe 11 from oxygen enrichment exhaust sector 27, then be transported to the device that uses oxygen rich gas, each the fan interior molecular sieve of molecular sieve drum 5 sector is through the time in the region between air inlet sector 16 and oxygen enrichment exhaust sector 27, be the time of the molecular sieve adsorption nitrogen in this sector, the rich nitrogen of air inlet distribution plate 4 corresponding sector 15 and the rich nitrogen of the distribution plate 9 of giving vent to anger 26 positions, sector of bleeding of bleeding are relative, make from the air inlet sector 16 of absorption nitrogen and the area of space between oxygen enrichment exhaust sector 27, rotate to rich nitrogen and bleed corresponding sector 15 and rich nitrogen while bleeding area of space between sector 26, the nitrogen of molecular sieve drum 5 internal adsorption by vacuum pump through the rich nitrogen sector 26 of bleeding, from rich nitrogen extraction pipe 13, extract out, bleed time in the region between sector 26 through bleed corresponding sector 15 and rich nitrogen of rich nitrogen in each the fan interior molecular sieve of molecular sieve drum 5 sector, be the time of the molecular sieve parsing nitrogen in this sector, the blowback air of air inlet distribution plate 4 sector 19 of giving vent to anger is relative with 30 positions, blowback air air inlet sector of the distribution plate 9 of giving vent to anger, make from rich nitrogen bleed corresponding sector 15 and rich nitrogen bleed area of space between sector 26, when rotating to blowback air and giving vent to anger area of space between sector 19 and blowback air air inlet sector 30, molecular sieve after resolved is by blowback, each the fan interior molecular sieve of molecular sieve drum 5 sector through blowback air give vent to anger the region between sector 19 and blowback air air inlet sector 30 time, be the molecular sieve blowback time in this sector.
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Claims (2)
1. without the method for many kind concentration rich oxygen airs of reversing valve production by pressure swing adsorption body, the gas inlet pipe (1) that is included in the separated rotating cylinder in Vacuum Pressure Swing Adsorption separator installs a compressor (32) additional, at rich nitrogen extraction pipe (13), install a vacuum pump (34) additional, utilize one to control computer (35), by control module (33), control compressor (32) rotating speed, and the starting of compressor (32) and vacuum pump (34), stop, and the speed of rotation of being controlled motor (7) by control module (33) is to control the speed of rotation of molecular sieve drum (5), thereby control molecular sieve adsorption and the time of resolving nitrogen in molecular sieve drum (5), final control from concentration and the flow of the interior oxygen rich gas of discharging of oxygen enrichment vapor pipe (11), it is characterized in that: the concentration that determines the oxygen rich gas of discharging in oxygen enrichment vapor pipe (11) and flow, relevant with the tamped density of molecular sieve with compressor (32) rotating speed, the speed of rotation of molecular sieve drum (5), when the lower oxygen rich gas concentration of needs, the tamped density of molecular sieve is reduced, strengthen pressurized air in the speed of flowing through of molecular sieve zone, suitably strengthen the rotating speed of compressor (32), and suitably strengthen the speed of rotation of molecular sieve drum (5), thereby make air with the higher flow velocity molecular sieve of flowing through, so that the air being pressed into from compressor (32) is reduced by the ratio of molecular sieve adsorption nitrogen, and then make to reduce but flow increase from the concentration of the interior oxygen rich gas of discharging of oxygen enrichment vapor pipe (11), within the scope of certain pressure, strengthen the rotating speed of compressor (32), strengthen the pressure of compressor (32) outlet air, can be conducive to molecular sieve adsorption nitrogen, the speed of rotation of compressor (32) can not increase too large, so main or dependence strengthens the speed of rotation of molecular sieve drum (5), to reduce pressurized air, flow through time of molecular sieve, thereby reduce air by the ratio of molecular sieve adsorption nitrogen, make the oxygen rich gas of discharging in oxygen enrichment vapor pipe (11) leave more nitrogen, the concentration of its oxygen rich gas just must reduce, when the higher oxygen rich gas concentration of needs, increase molecular sieve tamped density, reduce pressurized air the speed of flowing through of molecular sieve zone, suitably reduce compressor (32) rotating speed, and suitably reduce the speed of rotation of molecular sieve drum (5), thereby make air with the lower flow velocity molecular sieve of flowing through, so that the air being pressed into from compressor (32) increased by the ratio of molecular sieve adsorption nitrogen, and then the concentration of the oxygen rich gas of discharging in oxygen enrichment vapor pipe (11) is increased but flow reduces, when the concentration of controlling from the oxygen rich gas of discharge in oxygen enrichment vapor pipe (11), the speed of rotation of molecular sieve drum (5) is the most key, at the compressed-air actuated pressure of compressor (32) one regularly,, ratio that nitrogen be adsorbed shorter by the time of molecular sieve adsorption also less, the nitrogen ratios concentration larger, oxygen rich gas that finally contains from the oxygen rich gas of discharge in oxygen enrichment vapor pipe (11) is also just less the duration of contact of shorter, each nitrogen molecule of the speed of rotation time faster, that pressurized air is flowed through molecular sieve zone of molecular sieve drum (5) and molecular sieve, at the compressed-air actuated pressure of compressor (32) one regularly,, ratio that nitrogen be adsorbed longer by the time of molecular sieve adsorption also more greatly, the nitrogen ratios concentration less, oxygen rich gas that finally contains from the oxygen rich gas of discharge in oxygen enrichment vapor pipe (11) is also just larger the duration of contact of longer, each nitrogen molecule of the speed of rotation time slower, that pressurized air is flowed through molecular sieve zone of molecular sieve drum (5) and molecular sieve, when needing the oxygen rich gas of low concentration, need to reduce the tamped density of molecular sieve, its objective is in order to increase pressurized air in the speed of flowing through of molecular sieve zone, to reduce the average contact time of nitrogen molecule and molecular sieve in pressurized air, thereby reduce the ratio of molecular sieve adsorption nitrogen, when needing the oxygen rich gas of higher concentration, need to strengthen the tamped density of molecular sieve, its objective is in order to reduce pressurized air in the speed of flowing through of molecular sieve zone, to strengthen the average contact time of nitrogen molecule and molecular sieve in pressurized air, thereby strengthen the ratio of molecular sieve adsorption nitrogen, for same set of equipment, the tamped density of molecular sieve is larger, the speed of rotation of molecular sieve drum (5) is less, the oxygen rich gas concentration of its production just larger, oxygen enrichment flow is also just less, for same set of equipment, the tamped density of molecular sieve is less, the speed of rotation of molecular sieve drum (5) is larger, the oxygen rich gas concentration of its production just less, oxygen enrichment flow is also just larger.
2. the method without many kind concentration rich oxygen airs of reversing valve production by pressure swing adsorption body as claimed in claim 1, it is characterized in that: the separated rotating cylinder in Vacuum Pressure Swing Adsorption separator, comprises the P district, air inlet district of left end, the Q district, molecular sieve zone of centre and the oxygen enrichment collecting region Zone R of right-hand member;
(A) P district, air inlet district comprises gas inlet pipe (1), blowback air outlet pipe (2), intake hood (3) and air inlet distribution plate (4), air inlet distribution plate (4) is divided into air inlet sector (16), the rich nitrogen corresponding sector (15) of bleeding, the zone of transition that blowback air is given vent to anger sector (19) and formed between them, air inlet sector (16) is connected with gas inlet pipe (1), but with other separate from, the blowback air sector (19) of giving vent to anger is connected with blowback air outlet pipe (2), but with other separate from, the rich nitrogen corresponding sector (15) of bleeding is independent blind area, all isolate with other districts, the fan angle of air inlet sector (16) is, the bleed fan angle of corresponding sector (15) of rich nitrogen is β, the give vent to anger fan angle of sector (19) of blowback air is α, the bleed fan angle of the zone of transition between corresponding sector (15) of air inlet sector (16) and rich nitrogen is δ, the give vent to anger fan angle of zone of transition of sector (19) of air inlet sector (16) and blowback air is δ, and rich nitrogen the give vent to anger fan angle of zone of transition of sector (19) of corresponding sector (15) and blowback air of bleeding is δ,
(B) the Q district, molecular sieve zone in the middle of comprises molecular sieve drum (5), follow-up pulley (6), motor (7), motion-work wheel (8), molecular sieve drum (5) be take cylinder central shaft and is become a plurality of shapes as symmetry division, the fan section that size is identical, fan angle is Ω, all there is the sheet rubber the same with fan-shaped division plate width at each fan-shaped division plate two ends, the length of sheet rubber is 5mm ~ 30mm, the length of the sheet rubber of molecular sieve drum (5) left end and the air inlet sector (16) of left end, the rich nitrogen corresponding sector (15) of bleeding, blowback air is given vent to anger sector (19) and the zone of transition that forms between them matches, the gas barrier in Bing Nengshige district and can not enter other regions, the length of sheet rubber of molecular sieve drum (5) right-hand member and the rich nitrogen of the right-hand member sector (26) of bleeding, oxygen enrichment exhaust sector (27), blowback air air inlet sector (30) and the zone of transition forming between them match, the gas barrier in Bing Nengshige district and can not enter other regions, direction the place ahead one side of sheet rubber paramagnetic molecule screen drum (5) rotation has an inclined-plane, make the air inlet sector (16) of its its left end of swiping, the rich nitrogen corresponding sector (15) of bleeding, blowback air is given vent to anger sector (19) and during the end face of the zone of transition that forms between them, or each the rich nitrogen of its right-hand member of the swiping sector (26) of bleeding, oxygen enrichment exhaust sector (27), during the end face of blowback air air inlet sector (30) and the zone of transition that forms between them, the contact surface of sheet rubber and these sector end faces is larger, thereby can form the more scraping of sealing with these sector end faces, and then can meet the air that is blown into lower pressure, the blowback air of lower pressure and compared with the sealing of the condition that vacuumizes of low vacuum, molecular sieve drum (5) can rotate around molecular sieve drum (5) central shaft, under molecular sieve drum (5) downside, there is a follow-up pulley (6), follow-up pulley (6) is spool gear, follow-up pulley (6) periphery has the gear teeth, molecular sieve drum (5) periphery has the gear teeth, the gear teeth of molecular sieve drum (5) periphery match and are meshed with the gear teeth of follow-up pulley (6) periphery, the gear teeth of follow-up pulley (6) periphery are meshed with the gear teeth of motion-work wheel (8) again, motion-work wheel (8) is connected with motor (7) axle, by motor (7), drive motion-work wheel (8) rotation, motion-work wheel (8) drives follow-up pulley (6) rotation, follow-up pulley (6) drives molecular sieve drum (5) rotation again, the circular frequency of molecular sieve drum (5) rotation is Vo/ second, there are a plurality of uniform bogie wheels (22) the central shaft both sides of follow-up pulley (6), the weight of a plurality of bogie wheels (22) supporting molecular sieve drums (5),
(C) oxygen enrichment collecting region Zone R comprises oxygen enrichment vapor pipe (11), blowback air inlet tube (12), rich nitrogen extraction pipe (13), air leaving cover (10) and the distribution plate of giving vent to anger (9), the distribution plate (9) of giving vent to anger is divided into the rich nitrogen sector (26) of bleeding, oxygen enrichment exhaust sector (27), blowback air air inlet sector (30) and the zone of transition forming between them, the rich nitrogen sector (26) of bleeding is connected with rich nitrogen extraction pipe (13), but with other separate from, oxygen enrichment exhaust sector (27) is connected with oxygen enrichment vapor pipe (11), but with other separate from, blowback air air inlet sector (30) is connected with blowback air inlet tube (12), but with other separate from, the fan angle of oxygen enrichment exhaust sector (27) is, the bleed fan angle of sector (26) of rich nitrogen is β, the fan angle of blowback air air inlet sector (30) is α, the rich nitrogen sector (26) of bleeding is δ with the fan angle of the zone of transition of oxygen enrichment exhaust sector (27), the fan angle of the zone of transition of oxygen enrichment exhaust sector (27) and blowback air air inlet sector (30) is δ, and the rich nitrogen sector (26) of bleeding is δ with the fan angle of the zone of transition of blowback air air inlet sector (30),
(D) rich nitrogen is bled time β/Vo(second of molecular sieve adsorption nitrogen in fan angle β/molecular sieve drum (5) angular velocity of rotation Vo/ second=same fan section of sector (26)), the molecular sieve in fan angle/molecular sieve drum (5) angular velocity of rotation Vo/ second=same fan section of oxygen enrichment exhaust sector (27) is resolved time/Vo(second of nitrogen), molecular sieve blowback time α/Vo(second in fan angle alpha/molecular sieve drum (5) angular velocity of rotation Vo/ second=same fan section of blowback air air inlet sector (30)), according to the characteristic of molecular sieve, determine parameter beta/Vo, / Vo, α/Vo, the concentration parameter of the oxygen rich gas of producing with customer requirement, calculate molecular sieve drum (5) angular velocity of rotation Vo/ second, fan angle with oxygen enrichment exhaust sector (27), the bleed fan angle β of sector (26) of rich nitrogen, the fan angle alpha of blowback air air inlet sector (30), rich nitrogen fan angle δ, oxygen enrichment exhaust sector (27) and fan angle δ, the rich nitrogen of the zone of transition of blowback air air inlet sector (30) of sector (26) and the zone of transition of oxygen enrichment exhaust sector (27) sector (26) of bleeding of bleeding with the pass of fan angle δ, these three δ angles and the interior molecular sieve of molecular sieve drum (5) the fan section fan angle Ω of the zone of transition of blowback air air inlet sector (30) is: 2 Ω≤δ,
(E) the air inlet sector (16) of air inlet distribution plate (4) is relative with the position, oxygen enrichment exhaust sector (27) of the distribution plate of giving vent to anger (9), make the air with certain pressure being blown into from gas inlet pipe (1), enter into behind air inlet sector (16), the molecular sieve of the molecular sieve sector through being connected with air inlet sector (16) contacts, most nitrogen wherein by molecular sieve adsorption after, remaining oxygen rich gas enters into oxygen enrichment vapor pipe (11) from oxygen enrichment exhaust sector (27), then be transported to the device that uses oxygen rich gas, each the fan interior molecular sieve of molecular sieve drum (5) sector is through the time in the region between air inlet sector (16) and oxygen enrichment exhaust sector (27), be the time of the molecular sieve adsorption nitrogen in this sector, the rich nitrogen of air inlet distribution plate (4) corresponding sector (15) and the rich nitrogen of the distribution plate of giving vent to anger (9) position, sector (26) of bleeding of bleeding is relative, make from the air inlet sector (16) of absorption nitrogen and the area of space between oxygen enrichment exhaust sector (27), rotate to rich nitrogen and bleed corresponding sector (15) and rich nitrogen while bleeding area of space between sector (26), the nitrogen of molecular sieve drum (5) internal adsorption by vacuum pump through the rich nitrogen sector (26) of bleeding, from rich nitrogen extraction pipe (13), extract out, each fan interior the molecular sieve of molecular sieve drum (5) sector is passed through bleed corresponding sector (15) and rich nitrogen of rich nitrogen and is bled time in the region between sector (26), be the time of the molecular sieve parsing nitrogen in this sector, the blowback air of air inlet distribution plate (4) sector (19) of giving vent to anger is relative with the position, blowback air air inlet sector (30) of the distribution plate of giving vent to anger (9), make from the rich nitrogen area of space that corresponding sector (15) and rich nitrogen bleeds between sector (26) of bleeding, when rotating to blowback air and giving vent to anger area of space between sector (19) and blowback air air inlet sector (30), molecular sieve after resolved is by blowback, each fan interior the molecular sieve of molecular sieve drum (5) sector is passed through blowback air and is given vent to anger time in the region between sector (19) and blowback air air inlet sector (30), be the molecular sieve blowback time in this sector.
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| CN115245726A (en) * | 2022-08-09 | 2022-10-28 | 湖北中船气体有限公司 | Adsorption oxygen-making device capable of stabilizing oxygen outlet flow |
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