CN109368597A - A kind of oxygen generation system recycling unqualified oxygen and method - Google Patents
A kind of oxygen generation system recycling unqualified oxygen and method Download PDFInfo
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- CN109368597A CN109368597A CN201811554232.6A CN201811554232A CN109368597A CN 109368597 A CN109368597 A CN 109368597A CN 201811554232 A CN201811554232 A CN 201811554232A CN 109368597 A CN109368597 A CN 109368597A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0028—Separation of the specific gas from gas mixtures containing a minor amount of this specific gas
Abstract
The present invention relates to a kind of oxygen generation system for recycling unqualified oxygen and methods, and including absorbing unit and the production gas unit connecting with absorbing unit, the oxygen generation system of the unqualified oxygen of recycling further includes unqualified oxygen recovery unit；The absorbing unit includes adsorbent equipment and the compressed air inlet pipe that connect with the inlet end of the adsorbent equipment；The generating tube for producing gas unit and including gas buffer and being connect with the outlet side of the gas buffer；The unqualified oxygen recovery unit includes unqualified oxygen recovery pipe, and one end of the unqualified oxygen recovery pipe is connect with generating tube, and the other end is connect with compressed air inlet pipe.The oxygen generation system and method for the unqualified oxygen of recycling provided by the invention can efficiently use the unqualified oxygen of low concentration and save energy consumption to improve the rate of recovery of oxygen.
Description
Technical field
The invention belongs to gas absorption field, it is related to a kind of oxygen generation system more particularly to a kind of recycles unqualified oxygen
Oxygen generation system and method.
Background technique
Pressure-variable adsorption (PSA) is that one kind is important, has widely applied gas separating method, and omnibus control system method is
The important supplement of low-temperature deep oxygen technique, for generalling use CaA, CaX by traditional pressure swing adsorption method of air production oxygen,
The nitrogen absorbers such as NaX and LiX type are based on equilibrium adsorption theory oxygen, because adsorption capacity of these adsorbent materials to nitrogen compares oxygen
Gas is strong, and the pretty good industrial oxygenerating of Energy Efficiency Ratio may be implemented.But in the oxygen for producing higher degree, adsorbent is not abundant toward contact
Absorption nitrogen will discharge oxygen to guarantee going on smoothly for subsequent pressure, evacuation or inverse put step, oxygen recovery rate
It is low.
In the prior art it has been reported that some omnibus control system techniques, such as Li Jie et al. are in chemical industry and engineering
(2004), 21 (3): 201-205 has delivered the article of the technical progress of entitled separating oxygen from air by means of pressure swing adsorption, it is disclosed that two
Pressure swing adsorption technique, three pressure swing adsorption techniques and four pressure swing adsorption techniques, also disclose a series of improved method, such as
Completed adsorption bed is used to be completed the punching press of regenerator bed along the gas put, using the high gas of oxygen purity to suction
Attached bed the methods of clean, and the rate of recovery of oxygen can be improved while guaranteeing oxygen product concentration in this.
1597054 A of CN provides a kind of two sections of pressure-variable adsorption method for oxygen enriching, and this method uses two sections of pressure-variable adsorptions
Device serial operation, the first stage pressure swing adsorption apparatus are used to remove carbon dioxide, water and part nitrogen in air, and by nitrogen
Concentrate, the second stage pressure swing adsorption apparatus for by the nitrogen in the intermediate gas that be flowed out in the first stage pressure swing adsorption apparatus adsorption tower into
One-step removal, and oxygen concentration is increased to required concentration.Although the rate of recovery of oxygen, but equipment can be improved in this method
It is more, it takes up a large area, operating cost is high.
103768891 A of CN provides a kind of the two poles of the earth series-transformer adsorption oxygen-preparation process for improving oxygen recovery rate, the party
There are the two poles of the earth pressure swing adsorption systems in method, and wherein first order system is equipped with the bothersome equal nitrogen absorbers of routine based on equilibrium adsorption
The oxygen nitrogen of mechanism separates pressure-variable adsorption separation system, and second level system is equipped with adsorbents such as oxygen selectives based on equilibrium adsorption
The oxygen argon of mechanism separates pressure-variable adsorption separation system.Oxygen deprivation recycling circuit is provided between first order system and second level system,
The oxygen deprivation rich in argon gas generated in the system of the second level is discarded and is back to first order system.This method improves oxygen recovery rate
Method is to increase second level system, and valve is more, complicated for operation and take up a large area, and operating cost is high.
Although these disclosed process flows can improve the concentration of oxygen in final products, the rate of recovery of oxygen is improved,
Equipment scale is increased, and there is no produce gas to the underproof oxygen of absorption initial stage concentration to handle.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of oxygen system processed for recycling unqualified oxygen
System and method, using the oxygen generation system of the unqualified oxygen of recycling provided by the invention to the unqualified oxygen for adsorbing the initial stage
Gas is recycled, and is improved the rate of recovery of oxygen in unstripped gas, has been saved energy consumption.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of oxygen generation system for recycling unqualified oxygen, including absorbing unit and with suction
The oxygen generation system of the production gas unit of coupon member connection, the unqualified oxygen of recycling further includes unqualified oxygen recovery unit.
Unqualified oxygen recovery unit in the oxygen generation system of the unqualified oxygen of recycling provided by the invention is by recycling not
Qualified oxygen simultaneously recycles unqualified oxygen, improves the rate of recovery of oxygen.
The absorbing unit includes adsorbent equipment and the compressed air inlet pipe that connect with the inlet end of adsorbent equipment.Pressure
Contracting air enters adsorbent equipment through compressed air inlet pipe.
The generating tube for producing gas unit and including gas buffer and being connect with the outlet side of gas buffer.Institute
Gas buffer is stated for storing the oxygen of output in adsorbent equipment.
The unqualified oxygen recovery unit includes unqualified oxygen recovery pipe, one end of the unqualified oxygen recovery pipe
It is connect with generating tube, the other end is connect with compressed air inlet pipe.
Preferably, the unqualified oxygen recovery unit further includes the first valve being set on unqualified oxygen recovery pipeline
Door and the oxygen purity analyzer being set between first valve and the generating tube.The oxygen purity analyzer is used for
Analyze the oxygen purity in unqualified oxygen recovery pipeline.
Preferably, first valve is sequencing valve.The opening and closing of the sequencing valve is controlled by program control system, operation letter
Just, it is swift in response, reduces manual operation bring error.
Preferably, the unqualified oxygen recovery unit is additionally provided between first valve and oxygen purity analyzer
Exhaust valve.As oxygen purity < 90Vol%, and in adsorbent equipment, pressure is greater than the gas pressure in unqualified oxygen recovery unit
When power, unqualified oxygen is emptied via exhaust valve.
Preferably, the exhaust valve is sequencing valve.The opening and closing of the sequencing valve is controlled by program control system, operation letter
Just, it is swift in response, reduces manual operation bring error.
Preferably, the adsorbent equipment includes the first adsorption tower and the second adsorption tower being arranged in parallel.The suction being arranged in parallel
Attached tower can guarantee the continuity of adsorption operations and improve the utilization rate of oxygen.
Preferably, the inlet end of first adsorption tower and the second adsorption tower is connected in parallel with compressed air inlet pipe.
Preferably, first adsorption tower and the outlet side of the second adsorption tower and the inlet end of gas buffer it is in parallel connect
It connects.Gas buffer is used to stablize the air-flow of oxygen product.
Preferably, the absorbing unit further includes the second valve.
Preferably, second valve is sequencing valve.The opening and closing of the sequencing valve is controlled by program control system, operation letter
Just, it is swift in response, reduces manual operation bring error.
Preferably, second valve is set on the parallel pipeline of the first adsorption tower and the second adsorption tower.
Second valve includes the first intake valve SV2101A, the second intake valve SV2101B, the control of the first admission pressure
Valve SV2102A, the second admission pressure control valve SV2102B, first pressure balanced valve SV2103A, second pressure balanced valve
SV2013B, the first air outlet valve SV2104A, the second air outlet valve SV2104B, third intake valve ZH2101, first emptying valve NV2101
With second emptying valve NV2102.
The inlet end of first adsorption tower 21 is connected to by the first intake valve SV2101A with compressed air inlet pipe 1.
The inlet end of first adsorption tower 21 passes through the first admission pressure control valve SV2102A and first emptying valve NV2101
It is communicated with the atmosphere.
The inlet end of the outlet side of first adsorption tower 21 and the second adsorption tower 22 is connected by first pressure balanced valve SV2103A
It is logical.
The outlet side of first adsorption tower 21 passes through the first air outlet valve SV2104A and third intake valve ZH2101 and gas buffer
Device 3 is connected to.
The outlet side of first adsorption tower 21 is connected by the first air outlet valve SV2104A and second emptying valve NV2102 and atmosphere
It is logical.
The inlet end of second adsorption tower 22 is connected to by the second intake valve SV2101B with compressed air inlet pipe 1.
The inlet end of second adsorption tower 22 passes through the second admission pressure control valve SV2102B and first emptying valve NV2101
It is communicated with the atmosphere.
The inlet end of the outlet side of second adsorption tower 22 and the first adsorption tower 21 is connected by second pressure balanced valve SV2103B
It is logical.
The outlet side of second adsorption tower 22 passes through the second air outlet valve SV2104B and third intake valve ZH2101 and gas buffer
Device 3 is connected to.
The outlet side of second adsorption tower 22 is connected by the second air outlet valve SV2102B and second emptying valve NV2102 and atmosphere
It is logical.
Preferably, the oxygen generation system of the unqualified oxygen of recycling further includes the process control that can control sequencing valve opening and closing
System.
Preferably, the opening and closing of the control of described program control system the first valve, the second valve and exhaust valve.
Second aspect, the present invention also provides a kind of oxygen generation system recycling using the unqualified oxygen of recycling is unqualified
The method of oxygen, the described method comprises the following steps:
(1) oxygen is prepared by raw material pressure-variable adsorption of compressed unstripped gas, and recycles the oxygen of preparation；
(2) by the purity of preparation is unqualified and gas pressure is greater than the oxygen of pressure in the adsorbent equipment of the pressure-variable adsorption
Return is mixed with compressed unstripped gas, continues pressure-variable adsorption, until obtaining the oxygen of purity qualification.
Preferably, step (1) described unstripped gas includes air.Air source is extensive, cheap, those skilled in the art
Member is it should be clear that any mixed gas containing oxygen is included in the range of technical solution provided by the invention.
Preferably, the pressure of step (1) described pressure-variable adsorption be 0.25-0.65MPa, such as can be 0.25MPa,
0.3MPa, 0.35MPa, 0.4MPa, 0.45MPa, 0.5MPa, 0.55MPa, 0.6MPa or 0.65MPa, preferably 0.6Mpa.Institute
State pressure-variable adsorption pressure it is lower when, adsorbance of the adsorbent to nitrogen in adsorption tower and the adsorbance difference to oxygen are smaller, no
Conducive to obtaining the oxygen of purity qualification；When adsorptive pressure is higher, adsorbance of the adsorbent to nitrogen in adsorption tower and the suction to oxygen
Attached amount difference is larger, but the yield of oxygen reduces, therefore the pressure of pressure-variable adsorption that the present invention selects is 0.25-0.65MPa, this
The technical staff in field, which can according to need, reasonably to be selected.
Preferably, step (2) gas pressure be 0.35-0.45MPa, such as can be 0.35MPa, 0.37MPa,
0.39MPa, 0.4MPa, 0.42MPa, 0.44MPa or 0.45MPa, preferably 0.4MPa.The gas pressure and the gas are slow
The pressure of flushing device is identical, and when gas pressure is too low or excessively high, it is discontinuous therefore of the invention that the oxygen that absorbing unit generates produces gas
The gas pressure of selection is 0.35-0.45MPa, and those skilled in the art, which can according to need, reasonably to be selected.
Preferably, the unqualified oxygen purity < 90Vol% for referring to preparation of step (2) described oxygen purity, such as can be
10Vol%, 20Vol%, 30Vol%, 40Vol%, 50Vol%, 60Vol%, 70Vol%, 80Vol% or 89Vol% etc..
As the optimal technical scheme of second aspect of the present invention the method, the described method comprises the following steps:
(a) compressed unstripped gas enters adsorption tower, and the pressure in adsorbent equipment rises and generates oxygen；
(b) purity < 90Vol% and gas pressure of preparation are greater than to the oxygen of pressure in the adsorbent equipment of the pressure-variable adsorption
Gas return is mixed with compressed unstripped gas, continues pressure-variable adsorption；
(c) purity < 90Vol% and gas pressure of preparation are less than to the oxygen of pressure in the adsorbent equipment of the pressure-variable adsorption
Gas emptying；
(d) when the oxygen purity qualification of preparation, the oxygen of preparation is recycled；
Wherein, step (b)-(d) is without sequencing.
Compared with prior art, the invention has the following beneficial effects:
(1) present invention increases unqualified oxygen recovery pipe in traditional pressure swing adsorption oxygen making device, and in recovery tube
Upper to be provided with corresponding valve and oxygen purity analyzer, structure is simple, and cost is relatively low.
(2) present invention is by the unqualified oxygen recovery pipe of setting, caused by the initial stage by omnibus control system not
Qualified oxygen has carried out reflux and has adsorbed again, and the oxygen purity generated in adsorbent equipment boost phase is increased to 90Vol% or more,
And the rate of recovery for improving oxygen in unstripped gas is improved to 66-78%.
Detailed description of the invention
Fig. 1 is the flow chart of the oxygen generation system of the unqualified oxygen of recycling shown in embodiment 2.
Wherein: 1, compressed air inlet pipe；21, the first adsorption tower；22, the second adsorption tower；3, gas buffer；4, it produces
Tracheae；5, the first valve；6, exhaust valve；7, oxygen purity analyzer；8, unqualified oxygen recovery pipe.
Specific embodiment
The technical scheme of the invention is further explained by means of specific implementation.
The present invention is illustrated with following embodiment, but the present invention is not limited to the following embodiments, is not departing from the front and back ancestor
Under the range of purport, change is included in technical scope of the invention.
I) oxygen generation system
Embodiment 1
It present embodiments provides a kind of oxygen generation system for recycling unqualified oxygen and unqualified oxygen is recycled using the system
The method of gas, the system comprises unqualified oxygen recovery unit, absorbing unit and the production gas units connecting with absorbing unit.
The unqualified oxygen recovery unit includes unqualified oxygen recovery pipe 8, and the one of the unqualified oxygen recovery pipe 8
End is connect with generating tube 4, and the other end is connect with compressed air inlet pipe 1, is provided with first on the unqualified oxygen recovery pipe 8
Valve 5 and the oxygen purity analyzer 7 being set between first valve 5 and the generating tube 4, first valve 5 with
Exhaust valve 6 is provided between the oxygen purity analyzer 7.
The absorbing unit includes compressed air inlet pipe 1 and the first adsorption tower 21 being arranged in parallel and the second adsorption tower
22；The inlet end of the inlet end of first adsorption tower 21 and second adsorption tower 22 and the compressed air inlet pipe 1 are simultaneously
Connection connection；The outlet side of first adsorption tower 21 and the outlet side of second adsorption tower 22 and the gas buffer 3
Inlet end be connected in parallel；The second valve is provided on first adsorption tower 21 and the parallel pipeline of second adsorption tower 22
Door.
Second valve includes the first intake valve SV2101A, the second intake valve SV2101B, the control of the first admission pressure
Valve SV2102A, the second admission pressure control valve SV2102B, first pressure balanced valve SV2103A, second pressure balanced valve
SV2013B, the first air outlet valve SV2104A, the second air outlet valve SV2104B, third intake valve ZH2101, first emptying valve NV2101
With second emptying valve NV2102.
The inlet end of first adsorption tower 21 is connected to by the first intake valve SV2101A with compressed air inlet pipe 1.First inhales
The inlet end of attached tower 21 also passes through the first admission pressure control valve SV2102A and first emptying valve NV2101 is communicated with the atmosphere.
The outlet side of first adsorption tower 21 is connected to the inlet end of the second adsorption tower 22 by first pressure balanced valve SV2103A.First
The outlet side of adsorption tower 21 is connected to by the first air outlet valve SV2104A and third intake valve ZH2101 with gas buffer 3.The
The outlet side of one adsorption tower 21 also passes through the first air outlet valve SV2104A and second emptying valve NV2102 is communicated with the atmosphere.
The inlet end of second adsorption tower 22 is connected to by the second intake valve SV2101B with compressed air inlet pipe 1.Second inhales
The inlet end of attached tower 22 also passes through the second admission pressure control valve SV2102B and first emptying valve NV2101 is communicated with the atmosphere.
The outlet side of second adsorption tower 22 is connected to the inlet end of the first adsorption tower 21 by second pressure balanced valve SV2103B.Second
The outlet side of adsorption tower 22 is connected to by the second air outlet valve SV2104B and third intake valve ZH2101 with gas buffer 3.The
The outlet side of two adsorption towers 22 also passes through the second air outlet valve SV2102B and second emptying valve NV2102 is communicated with the atmosphere.
The production for producing gas unit and including gas buffer 3 and being connect with the outlet side of the gas buffer 3
Tracheae 4.
Using the system recycle unqualified oxygen method the following steps are included:
(1) the first intake valve SV2101A, the first air outlet valve SV2104A and third air outlet valve ZH2101 are opened, after compression
Unstripped gas pass sequentially through and enter the first adsorption tower 21 after compressed air inlet pipe 1 and the first intake valve SV2101A, the first absorption
Pressure rise in tower 21 simultaneously generates oxygen, and the oxygen of generation is discharged by the outlet side of the first adsorption tower 21, followed by
Enter the gas buffer 3 after SV2104A and ZH2101；
(2) oxygen in gas buffer 3 is expelled to generating tube 4 and the unqualified oxygen connecting with generating tube 4 returns
In closed tube 8；
(3) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity does not conform to
Lattice, and the gas pressure of the oxygen be greater than first adsorption tower 21 in pressure when, the first valve 5 open, the oxygen of preparation
Gas is back to compressed air inlet pipe 1 by unqualified oxygen recovery pipe 8, and mixes with compressed unstripped gas, continues
Pressure-variable adsorption；
(4) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity does not conform to
Lattice, and when the gas pressure of the oxygen is less than the pressure in first adsorption tower 21, the first valve 5 is closed, and exhaust valve 6 opens
It opens, the oxygen of preparation empties after passing sequentially through generating tube 4, unqualified oxygen recovery pipe 8 and exhaust valve 6；
(5) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity is qualified
When, the first valve 5 and exhaust valve 6 are closed, and the oxygen of the recycling preparation of generating tube 4 is passed through；
After 21 adsorption saturation of (6) first adsorption tower, all valves in closing system open first pressure balanced valve
SV2103A and second pressure balanced valve SV2103B, carries out the second adsorption tower 22 using the high pressure gas in the first adsorption tower 21
Pressure is handled；
(7) first pressure balanced valve SV2103A and second pressure balanced valve SV2103B is closed, the second intake valve is opened
SV2011B, the second air outlet valve SV2104B and third air outlet valve ZH2101, compressed unstripped gas pass sequentially through compressed air into
Tracheae 1 and the second intake valve SV2101B enter the first adsorption tower 22, and the pressure rise in the second adsorption tower 22 simultaneously generates oxygen,
The oxygen of generation is discharged by the outlet side of the second adsorption tower 22, slow followed by the gas is entered after SV2104B and ZH2101
Flushing device 3；
(8) oxygen in gas buffer 3 is expelled to generating tube 4 and the unqualified oxygen connecting with generating tube 4 returns
In closed tube 8；
(9) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity does not conform to
Lattice, and the gas pressure of the oxygen be greater than second adsorption tower 22 in pressure when, the first valve 5 open, the oxygen of preparation
Gas is back to compressed air inlet pipe 1 by unqualified oxygen recovery pipe 8, and mixes with compressed unstripped gas, continues
Pressure-variable adsorption；
(10) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity not
Qualification, and the gas pressure of the oxygen be less than first adsorption tower 22 in pressure when, the first valve 5 close, exhaust valve 7
It opens, the oxygen of preparation empties after passing sequentially through generating tube 4, unqualified oxygen recovery pipe 8 and exhaust valve 6；
(11) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity closes
When lattice, the first valve 5 and exhaust valve 6 are closed, and pass through the oxygen of the recycling preparation of generating tube 4；
(12) first adsorption towers 21 and the second adsorption tower 22 out-phase sequence are run, and repeat above-mentioned step.
For above-mentioned steps in addition to the valve of specified unlatching, remaining valve is in closed state, and wherein step (3)-(5) do not have
There is sequencing, step (9)-(11) do not have sequencing.
Embodiment 2
A kind of oxygen generation system for recycling unqualified oxygen is present embodiments provided, as shown in Figure 1, the present embodiment 2 is being implemented
Increase program control system on the basis of example 1, described program control system can control first valve 5, the second valve with
And the opening and closing of exhaust valve 6.
Using the system recycle unqualified oxygen method the following steps are included:
(1) the first intake valve SV2101A, the first air outlet valve SV2104A and third air outlet valve ZH2101 are opened, after compression
Unstripped gas pass sequentially through and enter the first adsorption tower 21 after compressed air inlet pipe 1 and the first intake valve SV2101A, the first absorption
Pressure rise in tower 21 simultaneously generates oxygen, and the oxygen of generation is discharged by the outlet side of the first adsorption tower 21, followed by
Enter the gas buffer 3 after SV2104A and ZH2101；
(2) oxygen in gas buffer 3 is expelled to generating tube 4 and the unqualified oxygen connecting with generating tube 4 returns
In closed tube 8；
(3) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity does not conform to
Lattice, and the gas pressure of the oxygen be greater than first adsorption tower 21 in pressure when, the first valve 5 open, the oxygen of preparation
Gas is back to compressed air inlet pipe 1 by unqualified oxygen recovery pipe 8, and mixes with compressed unstripped gas, continues
Pressure-variable adsorption；
(4) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity does not conform to
Lattice, and when the gas pressure of the oxygen is less than the pressure in first adsorption tower 21, the first valve 5 is closed, and exhaust valve 6 opens
It opens, the oxygen of preparation empties after passing sequentially through generating tube 4, unqualified oxygen recovery pipe 8 and exhaust valve 6；
(5) when the oxygen purity qualification of preparation, the first valve 5 and exhaust valve 6 are closed, and are recycled and are made by generating tube 4
Standby oxygen；
After 21 adsorption saturation of (6) first adsorption tower, all valves in closing system open first pressure balanced valve
SV2103A and second pressure balanced valve SV2103B, carries out the second adsorption tower 22 using the high pressure gas in the first adsorption tower 21
Pressure is handled；
(7) first pressure balanced valve SV2103A and second pressure balanced valve SV2103B is closed, the second intake valve is opened
SV2011B, the second air outlet valve SV2104B and third air outlet valve ZH2101, compressed unstripped gas pass sequentially through compressed air into
Tracheae 1 and the second intake valve SV2101B enter the first adsorption tower 22, and the pressure rise in the second adsorption tower 22 simultaneously generates oxygen,
The oxygen of generation is discharged by the outlet side of the second adsorption tower 22, slow followed by the gas is entered after SV2104B and ZH2101
Flushing device 3；
(8) oxygen in gas buffer 3 is expelled to generating tube 4 and the unqualified oxygen connecting with generating tube 4 returns
In closed tube 8；
(9) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity does not conform to
Lattice, and the gas pressure of the oxygen be greater than second adsorption tower 22 in pressure when, the first valve 5 open, the oxygen of preparation
Gas is back to compressed air inlet pipe 1 by unqualified oxygen recovery pipe 8, and mixes with compressed unstripped gas, continues
Pressure-variable adsorption；
(10) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity not
Qualification, and the gas pressure of the oxygen be less than first adsorption tower 22 in pressure when, the first valve 5 close, exhaust valve 6
It opens, the oxygen of preparation empties after passing sequentially through generating tube 4, unqualified oxygen recovery pipe 8 and exhaust valve 6；
(11) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity closes
When lattice, the first valve 5 and exhaust valve 6 are closed, and pass through the oxygen of the recycling preparation of generating tube 4；
(12) first adsorption towers 21 and the second adsorption tower 22 out-phase sequence are run, and repeat above-mentioned step.
For above-mentioned steps in addition to the valve of specified unlatching, remaining valve is in closed state, and wherein step (3)-(5) do not have
There is sequencing, step (9)-(11) do not have sequencing.
Comparative example 1
This comparative example provides a kind of oxygen generation system, in addition to not including unqualified oxygen recovery unit, remaining structure with
Oxygen generation system as described in example 2 is identical.
Using the oxygen generation system oxygen producing method the following steps are included:
(1) the first intake valve SV2101A, the first air outlet valve SV2104A and third air outlet valve ZH2101 are opened, after compression
Flow of feed gas enter the first adsorption tower 21 after the first intake valve SV2101A, the pressure in adsorbent equipment rises and generates oxygen
Gas, the oxygen of generation flows through the first air outlet valve SV2104A and third air outlet valve ZH2101 enters in gas buffer 3；
(2) after the pressure in gas buffer 3 reaches certain numerical value, the oxygen of preparation is arranged from gas buffer 3
Enter the generating tube 4 out.
After 21 adsorption saturation of (3) first adsorption tower, all valves in closing system open first pressure balanced valve
SV2103A and second pressure balanced valve SV2103B, carries out the second adsorption tower 22 using the high pressure gas in the first adsorption tower 21
Pressure is handled；
(4) first pressure balanced valve SV2103A and second pressure balanced valve SV2103B is closed, the second intake valve is opened
SV2011B, the second air outlet valve SV2104B and third air outlet valve ZH2101, compressed unstripped gas pass sequentially through compressed air into
Tracheae 1 and the second intake valve SV2101B enter the first adsorption tower 22, and the pressure rise in the second adsorption tower 22 simultaneously generates oxygen,
The oxygen of generation is discharged by the outlet side of the second adsorption tower 22, slow followed by the gas is entered after SV2104B and ZH2101
Flushing device 3；
(5) after the pressure in gas buffer 3 reaches certain numerical value, the oxygen of preparation is arranged from gas buffer 3
Enter the generating tube 4 out.
II) recovery method
Application examples 1
The oxygen generation system recycling that the application example provides the unqualified oxygen of recycling described in a kind of Application Example 2 is unqualified
The method of oxygen, the described method comprises the following steps:
(1) the first intake valve SV2101A, the first air outlet valve SV2104A and third air outlet valve ZH2101 are opened, after compression
Unstripped gas pass sequentially through and enter the first adsorption tower 21 after compressed air inlet pipe 1 and the first intake valve SV2101A, the first absorption
Pressure rise in tower 21 simultaneously generates oxygen, wherein maximum adsorption pressure set in the first adsorption tower 21 is 0.6MPa, generation
Oxygen be discharged by the outlet side of the first adsorption tower 21, filled followed by the gas buffer is entered after SV2104A and ZH2101
Set 3；
(2) pressure in gas buffer 3 reaches 0.35MPa, and the oxygen of preparation is discharged simultaneously from gas buffer 3
Into the generating tube 4 and the unqualified oxygen recovery pipe 8 being connect with the generating tube 4；
(3) prepared oxygen purity is detected using the oxygen purity analyzer 7, when preparation oxygen purity <
90Vol%, and when the pressure in the first adsorption tower 21 is less than for 0.35MPa, the first valve 5 is opened, and the oxygen of preparation is not by
Qualified oxygen recovery pipe 8 is back to compressed air inlet pipe 1, and mixes with compressed unstripped gas, continues pressure-variable adsorption；
(4) prepared oxygen purity is detected using the oxygen purity analyzer 7, when preparation oxygen purity <
90Vol%, and when the pressure in the first adsorption tower 21 is more than 0.35MPa, the first valve 5 is closed, and exhaust valve 6 is opened, preparation
Oxygen empties after passing sequentially through generating tube 4, unqualified oxygen recovery pipe 8 and exhaust valve 6；
(5) when the oxygen purity of preparation reaches 90Vol% or more, the first valve 5 and exhaust valve 6 are closed, and pass through production
The oxygen of the recycling preparation of tracheae 4；
After 21 adsorption saturation of (6) first adsorption tower, all valves in closing system open first pressure balanced valve
SV2103A and second pressure balanced valve SV2103B, carries out the second adsorption tower 22 using the high pressure gas in the first adsorption tower 21
Pressure is handled；
(7) first pressure balanced valve SV2103A and second pressure balanced valve SV2103B is closed, the second intake valve is opened
SV2011B, the second air outlet valve SV2104B and third air outlet valve ZH2101, compressed unstripped gas pass sequentially through compressed air into
Tracheae 1 and the second intake valve SV2101B enter the first adsorption tower 22, and the pressure rise in the second adsorption tower 22 simultaneously generates oxygen,
Wherein, the maximum adsorption pressure set in the second adsorption tower 22 as 0.6MPa, the oxygen of generation by the second adsorption tower 22 outlet
End discharge, followed by the gas buffer 3 is entered after SV2104B and ZH2101；
(8) pressure in gas buffer 3 reaches 0.35MPa, and the oxygen of preparation is discharged simultaneously from gas buffer 3
Into the generating tube 4 and the unqualified oxygen recovery pipe 8 being connect with the generating tube 4；
(9) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity <
90Vol%, and when the pressure in second adsorption tower 22 is less than 0.35MPa, the first valve 5 is opened, and the oxygen of preparation passes through
Unqualified oxygen recovery pipe 8 is back to compressed air inlet pipe 1, and mixes with compressed unstripped gas, continues transformation suction
It is attached；
(10) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity <
90Vol%, and when the pressure in second adsorption tower 22 is more than 0.35MPa, the first valve 5 is closed, and exhaust valve 6 is opened, system
Standby oxygen empties after passing sequentially through generating tube 4, unqualified oxygen recovery pipe 8 and exhaust valve 6；
(11) prepared oxygen purity is detected using the oxygen purity analyzer 7, when prepared oxygen purity <
When 90Vol%, the first valve 5 and exhaust valve 6 are closed, and pass through the oxygen of the recycling preparation of generating tube 4；
(12) first adsorption towers 21 and the second adsorption tower 22 out-phase sequence are run, and repeat above-mentioned step.
Remaining valve of above-mentioned steps in addition to the valve of specified unlatching is in closed state, wherein step (3)-(5)
There is no sequencing, step (9)-(11) do not have sequencing.
Application examples 2
The oxygen generation system recycling that the application example provides the unqualified oxygen of recycling described in a kind of Application Example 2 is unqualified
The method of oxygen, in the present embodiment method therefor except the pressure in gas buffer 3 reach the oxygen prepared after 0.45MPa from
The unqualified oxygen recovery pipe 8 for escaping and enter the generating tube 4 in gas buffer 3 and being connect with the generating tube 4,
And first adsorption tower 21 and the maximum pressure that second adsorption tower 22 reaches are outside 0.65MPa, remaining condition with answer
Use-case 1 is identical.
Application examples 3
The oxygen generation system recycling that the application example provides the unqualified oxygen of recycling described in a kind of Application Example 2 is unqualified
The method of oxygen, in the present embodiment method therefor except the pressure in gas buffer 3 reach the oxygen prepared after 0.4MPa from
The unqualified oxygen recovery pipe 8 for escaping and enter the generating tube 4 in gas buffer 3 and being connect with the generating tube 4,
And first adsorption tower 21 and the maximum pressure that second adsorption tower 22 reaches are outside 0.5MPa, remaining condition with application
Example 1 is identical.
Application examples 4
The oxygen generation system recycling that the application example provides the unqualified oxygen of recycling described in a kind of Application Example 2 is unqualified
The method of oxygen, in the present embodiment method therefor except the pressure in gas buffer 3 reach the oxygen prepared after 0.35MPa from
The unqualified oxygen recovery pipe 8 for escaping and enter the generating tube 4 in gas buffer 3 and being connect with the generating tube 4,
And first adsorption tower 21 and the maximum pressure that second adsorption tower 22 reaches are outside 0.4MPa, remaining condition with application
Example 1 is identical.
Compare application examples 1
This comparison application examples provides a kind of method of oxygen generation system oxygen producing provided using comparative example 1, the side
Method includes the following steps:
(1) the first intake valve SV2101A, the first air outlet valve SV2104A and third air outlet valve ZH2101 are opened, after compression
Flow of feed gas enter the first adsorption tower 21 after the first intake valve SV2101A, the pressure in the first adsorption tower 21 rises and produces
Raw oxygen, wherein the maximum adsorption pressure set in the first adsorption tower 21 is 0.6MPa, the oxygen of generation flows through the first air outlet valve
SV2104A and third air outlet valve ZH2101 enter in gas buffer 3；
(2) after the pressure in gas buffer 3 reaches 0.35Mpa, the oxygen of preparation is discharged from gas buffer 3
Into the generating tube 4.
After 21 adsorption saturation of (3) first adsorption tower, all valves in closing system open first pressure balanced valve
SV2103A and second pressure balanced valve SV2103B, carries out the second adsorption tower 22 using the high pressure gas in the first adsorption tower 21
Pressure is handled；
(4) first pressure balanced valve SV2103A and second pressure balanced valve SV2103B is closed, the second intake valve is opened
SV2011B, the second air outlet valve SV2104B and third air outlet valve ZH2101, compressed unstripped gas pass sequentially through compressed air into
Tracheae 1 and the second intake valve SV2101B enter the first adsorption tower 22, and the pressure rise in the second adsorption tower 22 simultaneously generates oxygen,
Wherein, the maximum adsorption pressure set in the second adsorption tower 22 as 0.6MPa, the oxygen of generation by the second adsorption tower 22 outlet
End discharge, followed by the gas buffer 3 is entered after SV2104B and ZH2101；
(5) pressure in gas buffer 3 reaches 0.35MPa, and standby oxygen is discharged into from gas buffer 3
The generating tube 4.
Compare application examples 2
This comparison application examples provides the method that oxygen generation system described in a kind of Comparison study example 1 recycles unqualified oxygen,
Delay except the pressure in gas buffer 3 reaches the oxygen prepared after 0.45MPa from gas in this comparison application examples method therefor
The generating tube 4, and the maximum that first adsorption tower 21 and second adsorption tower 22 reach are escaped and enter in flushing device 3
Pressure is outside 0.65MPa, remaining condition is identical as comparison application examples 1.
Compare application examples 3
This comparison application examples provides the method that oxygen generation system described in a kind of Comparison study example 1 recycles unqualified oxygen,
Except the pressure in gas buffer 3 reaches the oxygen prepared after 0.4MPa from gas buffer in this comparison application examples method therefor
The generating tube 4, and the maximum pressure that first adsorption tower 21 and second adsorption tower 22 reach are escaped and enter in device 3
Power is outside 0.5MPa, remaining condition is identical as application examples 1.
Compare application examples 4
This comparison application examples provides the method that oxygen generation system described in a kind of Comparison study example 1 recycles unqualified oxygen,
Delay except the pressure in gas buffer 3 reaches the oxygen prepared after 0.35MPa from gas in this comparison application examples method therefor
The generating tube 4, and the maximum that first adsorption tower 21 and second adsorption tower 22 reach are escaped and enter in flushing device 3
Pressure is outside 0.4MPa, remaining condition is identical as application examples 1.
When using application examples 1-4 provided by the invention and comparison application examples 1-4 oxygen producing, in the boosting of adsorbent equipment
The recovery utilization rate in stage, the oxygen purity and oxygen that are prepared is as shown in table 1, wherein oxygen purity be boost phase by
The collection of generating tube 4 obtains the average purity of oxygen.
Table 1
When preparing oxygen using adsorbent equipment, if the pressure in absorbing unit is lower, the higher oxygen of purity can not be obtained
Gas；If but the hypertonia in absorbing unit, part of oxygen can be made to be adsorbed, the rate of recovery of oxygen is caused to reduce.Comparison
The pressure in adsorbent equipment in application examples 2 is 0.65MPa, and the oxygen purity being prepared is 89Vol%, and oxygen recovery rate is
63%；And comparing the pressure in the adsorbent equipment in application examples 1 is 0.6MPa, the oxygen purity being prepared is 87Vol%, oxygen
Gas recovery rate is 65%；Comparing the pressure in the adsorbent equipment in application examples 3 is 0.5MPa, although oxygen recovery rate is 69%,
But the oxygen purity being prepared is only 85Vol%；Comparing the pressure in the adsorbent equipment in application examples 4 is 0.4MPa, although
Oxygen recovery rate is 73%, but the oxygen purity being prepared is only 83Vol%.
As shown in Table 1, in application examples 1-4 provided by the invention, the purity of oxygen can reach 90Vol% or more, and
The rate of recovery of oxygen changes between 66-78%.
Compare application examples 1 and compare application examples 1 it is found that application examples 1 and comparison application examples 1 in adsorbent equipment in pressure
Power is 0.6MPa, and due to being not provided with unqualified oxygen recovery unit in comparison application examples 1, the boost phase of adsorbent equipment is produced
Raw oxygen purity is down to 87Vol% by 90Vol%, and the rate of recovery of oxygen is reduced to 62% by 68%.
Compare application examples 2 and compare application examples 2 it is found that application examples 2 and comparison application examples 2 in adsorbent equipment in
Pressure is 0.65MPa, due to being not provided with unqualified oxygen recovery unit, the boosting rank of adsorbent equipment in comparison application examples 2
The oxygen purity that section generates is down to 89Vol% by 91Vol%, and the rate of recovery of oxygen is reduced to 61% by 66%.
Compare application examples 3 and compare application examples 3 it is found that application examples 3 and comparison application examples 3 in adsorbent equipment in
Pressure is 0.5MPa, due to being not provided with unqualified oxygen recovery unit, the boost phase of adsorbent equipment in comparison application examples 3
The oxygen purity of generation is down to 85Vol% by 90Vol%, and the rate of recovery of oxygen is reduced to 69% by 73%.
Compare application examples 4 and compare application examples 4 it is found that application examples 4 and comparison application examples 4 in adsorbent equipment in
Pressure is 0.4MPa, due to being not provided with unqualified oxygen recovery unit, the boost phase of adsorbent equipment in comparison application examples 3
The oxygen purity of generation is down to 83Vol% by 90Vol%, and the rate of recovery of oxygen is reduced to 75% by 78%.
To sum up, the present invention increases unqualified oxygen recovery pipe in traditional pressure swing adsorption oxygen making device, and is recycling
Corresponding valve and oxygen purity analyzer are provided on pipe, structure is simple, and cost is relatively low.The present invention is by being arranged unqualified oxygen
Gas recovery tube, unqualified oxygen caused by the initial stage by omnibus control system have carried out reflux and have adsorbed again, will absorption dress
It sets the oxygen purity generated in boost phase and is increased to 90Vol% or more, and the rate of recovery for improving oxygen in unstripped gas improves
To 66-78%.
The Applicant declares that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention not office
It is limited to this, it should be clear to those skilled in the art, any to belong to those skilled in the art and take off in the present invention
In the technical scope of dew, any changes or substitutions that can be easily thought of, and all of which fall within the scope of protection and disclosure of the present invention.
Claims (9)
1. a kind of oxygen generation system for recycling unqualified oxygen, including absorbing unit and the production gas unit being connect with absorbing unit,
It is characterized in that, the oxygen generation system of the unqualified oxygen of recycling further includes unqualified oxygen recovery unit；
The absorbing unit includes adsorbent equipment and the compressed air inlet pipe that connect with the inlet end of the adsorbent equipment；
The generating tube for producing gas unit and including gas buffer and being connect with the outlet side of the gas buffer；
The unqualified oxygen recovery unit includes unqualified oxygen recovery pipeline, one end of the unqualified oxygen recovery pipeline
It is connect with generating tube, the other end is connect with compressed air inlet pipe.
2. oxygen generation system according to claim 1, which is characterized in that the unqualified oxygen recovery unit further includes setting
It is pure in the first valve on unqualified oxygen recovery pipeline and the oxygen being set between first valve and the generating tube
Spend analyzer；
Preferably, first valve is sequencing valve.
3. oxygen generation system according to claim 2, which is characterized in that the unqualified oxygen recovery unit further includes setting
Exhaust valve between first valve and the oxygen purity analyzer；
Preferably, the exhaust valve is sequencing valve.
4. oxygen generation system according to claim 1-3, which is characterized in that the adsorbent equipment includes being arranged in parallel
The first adsorption tower and the second adsorption tower；
Preferably, the inlet end of first adsorption tower and the second adsorption tower is connected in parallel with compressed air inlet pipe；
Preferably, first adsorption tower and the outlet side of the second adsorption tower and the inlet end of gas buffer are connected in parallel.
5. oxygen generation system according to claim 1 or 4, which is characterized in that the absorbing unit further includes the second valve；
Preferably, second valve is sequencing valve；
Preferably, second valve is set on the parallel pipeline of the first adsorption tower and the second adsorption tower.
6. the oxygen generation system of the unqualified oxygen of recycling according to claim 1-5, which is characterized in that the oxygen processed
System further includes program control system；
Preferably, the oxygen generation system further includes the opening and closing that program control system is used to control the sequencing valve；
Preferably, the opening and closing of the control of described program control system the first valve, the second valve and exhaust valve.
7. a kind of method that oxygen generation system as claimed in any one of claims 1 to 6 recycles unqualified oxygen, which is characterized in that institute
State method the following steps are included:
(1) oxygen is prepared by raw material pressure-variable adsorption of compressed unstripped gas, and recycles the oxygen of preparation；
(2) by the purity of preparation is unqualified and gas pressure is greater than the oxygen of pressure in the adsorbent equipment of the pressure-variable adsorption and returns
It is mixed with compressed unstripped gas, continues pressure-variable adsorption, until obtaining the oxygen of purity qualification.
8. the method according to the description of claim 7 is characterized in that step (1) described unstripped gas includes air；
Preferably, the pressure of step (1) described pressure-variable adsorption is 0.25-0.65MPa, preferably 0.6Mpa；
Preferably, step (2) gas pressure is 0.35-0.45MPa, preferably 0.4MPa；
Preferably, the unqualified oxygen purity < 90Vol% for referring to preparation of the purity of step (2) described oxygen.
9. method according to claim 7 or 8, which is characterized in that the described method comprises the following steps:
(a) compressed unstripped gas enters adsorption tower, and the pressure in adsorbent equipment rises and generates oxygen；
(b) oxygen that the purity < 90Vol% and gas pressure of preparation are greater than to pressure in the adsorbent equipment of the pressure-variable adsorption returns
It returns and is mixed with compressed unstripped gas, continue pressure-variable adsorption；
(c) oxygen that the purity < 90Vol% and gas pressure of preparation are less than to pressure in the adsorbent equipment of the pressure-variable adsorption is arranged
It is empty；
(d) when the oxygen purity qualification of preparation, the oxygen of preparation is recycled；
Wherein, step (b)-(d) is without sequencing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554232.6A CN109368597A (en) | 2018-12-18 | 2018-12-18 | A kind of oxygen generation system recycling unqualified oxygen and method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858610A (en) * | 2016-03-25 | 2016-08-17 | 江苏嘉宇特种装备股份有限公司 | Highly-efficient molecular sieve oxygen generator |
| CN209442643U (en) * | 2018-12-18 | 2019-09-27 | 上海穗杉实业股份有限公司 | A kind of oxygen generation system recycling unqualified oxygen |
-
2018
- 2018-12-18 CN CN201811554232.6A patent/CN109368597A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858610A (en) * | 2016-03-25 | 2016-08-17 | 江苏嘉宇特种装备股份有限公司 | Highly-efficient molecular sieve oxygen generator |
| CN209442643U (en) * | 2018-12-18 | 2019-09-27 | 上海穗杉实业股份有限公司 | A kind of oxygen generation system recycling unqualified oxygen |
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