CN214087712U - Oxygen purification and regeneration equipment in multi-tower molecular sieve oxygen generation system - Google Patents
Oxygen purification and regeneration equipment in multi-tower molecular sieve oxygen generation system Download PDFInfo
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- CN214087712U CN214087712U CN202022674450.2U CN202022674450U CN214087712U CN 214087712 U CN214087712 U CN 214087712U CN 202022674450 U CN202022674450 U CN 202022674450U CN 214087712 U CN214087712 U CN 214087712U
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Abstract
The utility model discloses an oxygen purification and regeneration device in a multi-tower molecular sieve oxygen generation system, which comprises a first adsorption tower and a second adsorption tower which are filled with zeolite molecular sieves, wherein the air inlet of the first adsorption tower is communicated with a pressure equalizing tower through a solenoid valve V, the air inlet of the pressure equalizing tower is sequentially communicated with a compressor, a second-stage filter, a dehumidifier and a first-stage filter, the air inlet of the first-stage filter is communicated with an air inlet pipe, the air inlets of the first adsorption tower and the second adsorption tower are communicated with a rotary valve, the rotary valve is communicated with the air inlet of a bacterial filter and the air outlet of an oxygen buffer tower, a secondary recovery and purification process is innovatively added on the basis of multiple pressure equalizing, high-purity oxygen which does not reach the requirement of oxygen concentration in the oxygen buffer tank is conveyed to the adsorption tower for secondary purification by utilizing the pressure difference between the oxygen buffer tank and the adsorption tower, a large amount of oxygen in the buffer tank can be conveyed to the adsorption tower, and then the following processes are carried out to realize the secondary purification of the unqualified oxygen.
Description
Technical Field
The utility model relates to an oxygen system technical field specifically is oxygen purification, regeneration facility among many towers molecular sieve system oxygen system.
Background
Molecular sieve oxygen generation system: at normal temperature, a pressure swing adsorption process is adopted, and oxygen in the air is separated from nitrogen by using a molecular sieve, so that the oxygen is extracted. The principle is as follows: by utilizing the molecular sieve physical adsorption and desorption technology, the molecular sieve is filled in the oxygen generator, nitrogen in the air can be adsorbed when the oxygen is pressurized, and the residual unabsorbed oxygen is collected and purified to obtain high-purity oxygen. The molecular sieve discharges the adsorbed nitrogen back to the ambient air during decompression, and can adsorb the nitrogen and prepare oxygen during next pressurization, and the whole process is a periodic dynamic circulation process without consumption of the molecular sieve.
Molecular sieve: the zeolite molecular sieve is an inorganic crystal material, is widely applied to the fields of catalysis, adsorption, ion exchange and the like due to the regular pore structure, stronger acidity and high hydrothermal stability, and plays an irreplaceable role.
Adsorption of zeolite molecular sieves is a physical process of change. The adsorption is mainly caused by the surface force generated by the molecular attraction acting on the surface of the solid, when the fluid flows through, some molecules in the fluid collide with the surface of the adsorbent due to irregular movement, and molecular concentration is generated on the surface, so that the number of the molecules in the fluid is reduced, and the purposes of separation and removal are achieved. Since the adsorption does not change chemically, the zeolite molecular sieve has the adsorption capacity by trying to drive off the molecules concentrated on the surface, and the process is the reverse process of adsorption, namely desorption or regeneration. The zeolite molecular sieve has uniform pore diameter, and can easily enter the crystal cavities to be adsorbed only when the molecular kinetic diameter is smaller than the pore diameter of the zeolite molecular sieve, so that the zeolite molecular sieve is just like a sieve for gas and liquid molecules, and whether the zeolite molecular sieve is adsorbed or not is determined according to the size of the molecules. Because the crystal cavities of the zeolite molecular sieve have stronger polarity, the zeolite molecular sieve can have strong action with molecules containing polar groups on the surface of the zeolite molecular sieve, or polarize polarizable molecules through induction to generate strong adsorption. The characteristic that the polar or easily polarized molecule is easily adsorbed by the polar zeolite molecular sieve represents another adsorption selectivity of the zeolite molecular sieve.
The oxygen purification and regeneration method comprises the following steps: in the molecular sieve oxygen production process, at the beginning of starting, the oxygen concentration is gradually increased to more than 90% from the environmental oxygen concentration, the oxygen concentration is required to reach more than 90% within 30 minutes according to national regulations, the multi-tower oxygen production process is about 10 minutes, the generated oxygen is not allowed to be conveyed outwards because the oxygen concentration does not reach the specified value in the period, if the oxygen is discharged indoors, the environmental oxygen concentration is influenced to generate fire hazard, and the energy in the oxygen production process is wasted.
The molecular sieve oxygen generation is realized in a physical mode, nitrogen molecules in compressed air are adsorbed by adopting a molecular sieve, oxygen molecules are dissociated outside the molecular sieve and are conveyed into a pipeline through pressure difference, the molecular sieve in an adsorption tower is used for separating nitrogen from oxygen in the air compressed in the environment at the beginning, the separated oxygen concentration is low, the rising trend from the ambient oxygen concentration to the finished product oxygen concentration (more than or equal to 90%) is shown, and the oxygen in the rising process cannot be conveyed into the pipeline because the oxygen concentration does not reach the standard requirement and can only be discharged into the air or be accumulated into the pipeline in a sealed mode, so that the oxygen concentration is not promoted.
In the prior art, the application No. 2018221284806 of oxygen generation system for recovering unqualified oxygen adopts the technical proposal that unqualified oxygen is conveyed into a gas supply pipeline through a pipeline, is mixed with compressed air and then is put into an adsorption tower for extracting the oxygen. In practical use, because a certain pressure difference exists between the inlet air and the outlet oxygen of the adsorption tower, the air pressure is more than 0.5MPa of the oxygen pressure, for example, the inlet air pressure of the adsorption tower is more than 0.45MPa, and the oxygen pressure is within 0.4MPa, so that the backflow oxygen cannot be merged into a compressed air pipeline because the pressure of the backflow oxygen is lower than that of the compressed air, and the use effect is poor. Therefore, the utility model provides an oxygen purification, regeneration facility and application method in multi-tower molecular sieve oxygen generation system to solve the problem that proposes in the above-mentioned background art.
Disclosure of Invention
An object of the utility model is to provide oxygen purification, regeneration facility and application method among many towers molecular sieve system oxygen system to solve unqualified oxygen and be less than compressed air's pressure because of pressure, the reason of the two pressure differential leads to unqualified oxygen can't collect with compressed air source, so the poor problem of result of use.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model discloses an oxygen purification, regeneration facility among many towers molecular sieve system oxygen system, including a plurality of adsorption towers, air feeder, exhaust apparatus, buffer tank, connecting tube and the control valve that are filled with zeolite molecular sieve, the adsorption tower is connected to the buffer tank through independent connecting tube separately, and the control valve sets up the connecting tube.
As a further aspect of the utility model, the buffer tank still is provided with barometer i that is used for detecting the air pressure in the buffer tank.
As a further aspect of the present invention, the adsorption tower is further provided with a barometer II for detecting the air pressure in the adsorption tower.
As a further proposal of the utility model, the oxygen purification and regeneration equipment in the multi-tower molecular sieve oxygen generation system also comprises a PLC which is connected to a control valve, a barometer I and a barometer II.
As a further scheme of the utility model, the surge tank still is connected with pressure equipment, and pressure equipment's air inlet is connected to the surge tank, and pressure equipment's gas vent is connected to the adsorption tower.
As a further proposal of the utility model, the pressurizing device is an air compressor.
As a further proposal of the utility model, the utility model comprises more than two adsorption towers filled with zeolite molecular sieves, taking two adsorption towers and electromagnetic valve control as examples, a first adsorption tower and a second adsorption tower are arranged, the air inlet of the first adsorption tower is communicated with a pressure equalizing tower through an electromagnetic valve V1, the air inlet of the pressure equalizing tower is sequentially communicated with a compressor, a second filter, a dehumidifier and a first filter, the air inlet of the first filter is communicated with an air inlet pipe, the air inlets of the first adsorption tower and the second adsorption tower are both communicated with a rotary valve, the rotary valve is communicated with the air inlet of a bacterial filter and the air outlet of an oxygen buffer tower, an electromagnetic valve V4 is arranged between the rotary valve and the bacterial filter, the air outlet of the bacterial filter 1 is communicated with an oxygen outlet, the air outlet of the first adsorption tower is communicated with the air inlet of the oxygen buffer tower through an electromagnetic valve V21, the air outlet of the first adsorption tower is communicated with a nitrogen outlet through an electromagnetic valve V31, the air outlet of the second adsorption tower is communicated with the air inlet of the oxygen buffer tower through an electromagnetic valve V22, and the gas outlet of the second adsorption tower is communicated with a nitrogen outlet through an electromagnetic valve V32.
As the utility model discloses further scheme, the oxygen buffer tower is provided with the thief hatch, and thief hatch intercommunication oxygen concentration analyzer carries out data analysis, closes solenoid valve V4 when unqualified, carries out the secondary purification in carrying the adsorption tower of difference with the oxygen in the oxygen buffer tower through the rotary valve to promotion oxygen concentration that can be rapid.
As a further aspect of the present invention, the electromagnetic valves V1, V21, V31, V22, V32 and V4 are all check valves.
In actual use, when a four-adsorption tower or six-adsorption tower process is adopted, an intelligent rotary valve is adopted to replace an electromagnetic valve or a one-way valve, and an oxygen buffer tank is arranged at an oxygen outlet. In this scheme implementation process, at first store the oxygen buffer tank in advance with unqualified oxygen and outwards discharge not, normal condition is at many towers system oxygen in-process, the adsorption tower draws the back to compressed air, carry out the secondary voltage-sharing, divide remaining low concentration oxygen in the adsorption tower to fill twice into in other adsorption towers, arrange the nitrogen again, the equal pressure gas of other adsorption towers is received to the rethread after accomplishing the row nitrogen, carry out the secondary purification, add compressed air and carry out preparing of oxygen again, system oxygen system control valve carries out the switching of system oxygen technology through the rotation. The utility model discloses a technical innovation can retrieve the unqualified oxygen of oxygen initial stage storage in the oxygen buffer tank, fills into the first step in the purification of secondary voltage-sharing, and the adsorption tower is after the nitrogen discharge this moment, and pressure is the same with atmospheric pressure, and unqualified oxygen can be rapid flow in this adsorption tower, passes through compressed air purification oxygen after the secondary voltage-sharing again. Each adsorption tower is repeatedly carried out, and the purification can be fully carried out by utilizing the oxygen in the oxygen buffer tank. And can pass through barometer I and barometer II
The pressure states in the buffer tank and the adsorption tower are respectively monitored, so that when the preset condition is met, namely the pressure in the buffer tank is greater than the pressure in the adsorption tower, sufficient unqualified oxygen is accumulated in the buffer tank, secondary adsorption recovery operation can be carried out, and a corresponding control valve can be opened. Of course, the process can be automatically controlled by connecting the PLC control to the barometers I and II and the control valve.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a thereby the rotary valve carries out backward flow buffering to the unqualified oxygen in the oxygen buffer tower and realizes the secondary purification of unqualified oxygen in the adsorption tower.
2. The utility model discloses a carry unqualified oxygen and carry out the secondary purification in carrying the adsorption tower of evacuation.
3. The utility model discloses a be provided with the thief hatch on the oxygen buffer tower, lead to the thief hatch and carry out data analysis in carrying oxygen concentration analyzer, close solenoid valve V4 when unqualified, carry out the secondary purification in carrying the adsorption tower of difference with the oxygen in the oxygen buffer tower through the rotary valve to promotion oxygen concentration that can be rapid.
Drawings
FIG. 1 is a process flow diagram of an oxygen purification and regeneration device in a multi-tower molecular sieve oxygen generation system.
FIG. 2 is a process flow diagram of the secondary purification of oxygen purification in a multi-tower molecular sieve oxygen generation system.
In the figure: 1. an air inlet pipe; 2. a first stage filter; 3. a dehumidifier; 4. a secondary filter; 5. a compressor; 6. a first adsorption tower; 7. a second adsorption tower; 8. an oxygen buffer tower; 9. rotating the valve; 10. a bacterial filter; 11. an oxygen outlet; 12. a pressure equalizing tower; 13. a nitrogen outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1, in the embodiment of the present invention, an oxygen purifying and regenerating apparatus in a multi-tower molecular sieve oxygen generating system and a method for using the same are illustrated by replacing a plurality of adsorption towers with two towers, the two towers at least include a first adsorption tower 1 and a second adsorption tower 7 filled with zeolite molecular sieves, an air inlet of the first adsorption tower 6 is communicated with a pressure equalizing tower 12 through a solenoid valve V1, an air inlet of the pressure equalizing tower 12 is sequentially communicated with a compressor 5, a second filter 4, a dehumidifier 3 and a first filter 2, an air inlet of the first filter 2 is communicated with an air inlet pipe 1, air inlets of the first adsorption tower 6 and the second adsorption tower 7 are both communicated with a rotary valve 9, the rotary valve 9 is communicated with an air inlet of a bacteria filter 10 and an air outlet of an oxygen buffer tower 8, a solenoid valve V4 is disposed between the rotary valve 9 and the bacteria filter 10, an air outlet of the bacteria filter 10 is communicated with an oxygen outlet 11, an air outlet of the first adsorption tower 6 is communicated with an air inlet of the oxygen buffer tower 8 through a solenoid valve V21, the gas outlet of the first adsorption tower 6 is communicated with the nitrogen outlet 13 through an electromagnetic valve V31, the gas outlet of the second adsorption tower 7 is communicated with the gas inlet of the oxygen buffer tower 8 through an electromagnetic valve V22, and the gas outlet of the second adsorption tower 7 is communicated with the nitrogen outlet 13 through an electromagnetic valve V32;
The electromagnetic valves V1, V21, V31, V22, V32 and V4 are all one-way valves.
The utility model discloses a to rotary valve 9 and oxygen buffer tower 8 set up a voltage-sharing return circuit, when oxygen concentration is low, 8 outlet solenoid valve V4 of oxygen buffer tower close, and the pressure in the oxygen buffer tower 8 increases, will be higher than the voltage-sharing pressure of the adsorption tower of normal during operation, and oxygen in the oxygen buffer tower 8 can carry oxygen through former oxygen passageway and carry out pre-charging and purification in the adsorption tower through rotary valve 9. After repeated purification, when the oxygen concentration requirement is met, an oxygen supply valve V4 at the outlet of the oxygen buffer tower 8 is opened, and oxygen is conveyed outwards.
Example two
Referring to fig. 2, the embodiment of the present invention is different from the first embodiment in that an intelligent rotary valve is used to replace a solenoid valve or a one-way valve, an oxygen buffer tank is disposed at an oxygen outlet, 4-6 adsorption towers are provided, each adsorption tower is independently connected with the intelligent rotary valve, and oxygen in the oxygen buffer tower 8 is transported to different adsorption towers through the intelligent rotary valve for secondary purification, so as to rapidly increase oxygen concentration.
In the multi-tower oxygen generation process, after the adsorption tower extracts the compressed air, pressure equalization is carried out twice, the residual low-concentration oxygen in the adsorption tower is filled into other adsorption towers twice, nitrogen is discharged again, after the nitrogen discharge is completed, secondary purification is carried out by receiving the pressure equalization gas of other adsorption towers, the compressed air is added again to carry out oxygen preparation, and the rotary valve 9 is used for carrying out oxygen generation process switching through rotation. The utility model discloses a technical innovation can retrieve the unqualified oxygen of oxygen initial stage storage in oxygen buffer tower 8, fills into the first step in the purification of secondary voltage-sharing, and the adsorption tower is after the nitrogen discharge this moment, and pressure is the same with atmospheric pressure, and unqualified oxygen can be rapid flow in this adsorption tower, passes through compressed air purification oxygen after the secondary voltage-sharing again. Each adsorption tower is repeatedly carried out, and the oxygen in the oxygen buffer tower 8 can be fully utilized for purification.
The innovative secondary recovery and purification process that has increased on the basis of many times pressure-sharing, through utilizing the pressure differential of oxygen buffer tank and adsorption tower, carry the high-purity oxygen that does not reach the oxygen concentration requirement in the oxygen buffer tank to the adsorption tower and carry out the secondary purification, the pressure only has the ordinary pressure after the evacuation of oxygen adsorption tower, be connected buffer tank and this adsorption tower through the rotary valve this moment, can carry the adsorption tower with a large amount of oxygen in the buffer tank in, thereby carry out following process again and realized the secondary purification of unqualified oxygen.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The oxygen purification and regeneration equipment in the multi-tower molecular sieve oxygen generation system comprises a plurality of adsorption towers filled with zeolite molecular sieves, gas supply equipment and exhaust equipment, and is characterized by also comprising buffer tanks, connecting pipelines and control valves, wherein the adsorption towers are respectively connected to the buffer tanks through independent connecting pipelines, and the control valves are arranged on the connecting pipelines;
the adsorption tower at least comprises a first adsorption tower (6) and a second adsorption tower (7) which are filled with zeolite molecular sieves, the air inlets of the first adsorption tower (6) are communicated with a pressure equalizing tower (12) through an electromagnetic valve V1, the air inlets of the pressure equalizing tower (12) are sequentially communicated with a compressor (5), a secondary filter (4), a dehumidifier (3) and a primary filter (2), the air inlets of the primary filter (2) are communicated with an air inlet pipe (1), the air inlets of the first adsorption tower (6) and the second adsorption tower (7) are communicated with a rotary valve (9), the rotary valve (9) is communicated with the air inlet of a bacterial filter (10) and the air outlet of an oxygen buffer tower (8), an electromagnetic valve V4 is arranged between the rotary valve (9) and the bacterial filter 10, the air outlet of the bacterial filter (10) is communicated with an oxygen outlet (11), the air outlet of the first adsorption tower (6) is communicated with the air inlet of the oxygen buffer tower (8) through an electromagnetic valve V21, the gas outlet of the first adsorption tower (6) is communicated with the nitrogen outlet (13) through a solenoid valve V31, the gas outlet of the second adsorption tower (7) is communicated with the gas inlet of the oxygen buffer tower (8) through a solenoid valve V22, and the gas outlet of the second adsorption tower (7) is communicated with the nitrogen outlet (13) through a solenoid valve V32.
2. The oxygen purifying and regenerating device in the oxygen generating system with multiple towers and molecular sieves as the claim 1, wherein the buffer tank is also provided with a barometer I for detecting the air pressure in the buffer tank.
3. The oxygen purifying and regenerating device in the oxygen generating system with multiple towers and molecular sieves as the claim 1, wherein the adsorption tower is further provided with a barometer II for detecting the air pressure in the adsorption tower.
4. The oxygen purifying and regenerating device in the oxygen generating system with multiple towers according to any one of claims 1 to 3, wherein the oxygen purifying and regenerating device in the oxygen generating system with multiple towers further comprises a PLC, and the PLC is controlled and connected to the control valve, the barometer I and the barometer II.
5. The oxygen purifying and regenerating device in the oxygen generating system with multiple towers and molecular sieves as the claim 1, wherein the oxygen buffer tower (8) is provided with a sampling port which is communicated with an oxygen concentration analyzer.
6. The apparatus for oxygen purification and regeneration in the multi-tower molecular sieve oxygen generation system of claim 1, wherein the electromagnetic valves V1, V21, V31, V22, V32 and V4 are all one-way valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022674450.2U CN214087712U (en) | 2020-11-18 | 2020-11-18 | Oxygen purification and regeneration equipment in multi-tower molecular sieve oxygen generation system |
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| CN202022674450.2U CN214087712U (en) | 2020-11-18 | 2020-11-18 | Oxygen purification and regeneration equipment in multi-tower molecular sieve oxygen generation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114538382A (en) * | 2020-11-18 | 2022-05-27 | 威海东兴电子有限公司 | Oxygen purification and regeneration equipment in multi-tower molecular sieve oxygen generation system and use method thereof |
| CN114904361A (en) * | 2022-05-13 | 2022-08-16 | 威海柏林圣康空氧科技有限公司 | Adsorption tower device |
| CN115463512A (en) * | 2022-09-19 | 2022-12-13 | 杨坤 | Oxygen generation system |
-
2020
- 2020-11-18 CN CN202022674450.2U patent/CN214087712U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114538382A (en) * | 2020-11-18 | 2022-05-27 | 威海东兴电子有限公司 | Oxygen purification and regeneration equipment in multi-tower molecular sieve oxygen generation system and use method thereof |
| CN114904361A (en) * | 2022-05-13 | 2022-08-16 | 威海柏林圣康空氧科技有限公司 | Adsorption tower device |
| CN115463512A (en) * | 2022-09-19 | 2022-12-13 | 杨坤 | Oxygen generation system |
| CN115463512B (en) * | 2022-09-19 | 2024-02-13 | 杨坤 | Oxygen generation system |
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