CN2277059Y - Oxygen-enriched preparing appts. - Google Patents
Oxygen-enriched preparing appts. Download PDFInfo
- Publication number
- CN2277059Y CN2277059Y CN 97206555 CN97206555U CN2277059Y CN 2277059 Y CN2277059 Y CN 2277059Y CN 97206555 CN97206555 CN 97206555 CN 97206555 U CN97206555 U CN 97206555U CN 2277059 Y CN2277059 Y CN 2277059Y
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- CN
- China
- Prior art keywords
- valve
- adsorption tower
- oxygen
- adsorption
- storage tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Separation Of Gases By Adsorption (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The utility model relates to an enriched oxygen preparing apparatus of a molecular sieve adsorption tower, which is provided with two or more than two adsorption towers and a storing tank and is also matched with an air inlet and an air outlet valves and an equalizing valve. The utility model is characterized in that retaining valves are arranged between the adsorption towers and the storing tank, and a flushing air flow valve group composed of the retaining valves and locking valves is arranged between the outlet ends of the adsorption towers. Compared with the prior art, under the same flow quantity, the oxygen concentration of the product is improved to 93 % from 90 %; otherwise, under the same oxygen concentration, the air flow quantity of the product is increased by 10 to 15 %.
Description
The utility model relates to a kind of device with adsorbing tower with molecular sieve system oxygen enrichment, and especially a kind of small-sized system oxygen-enriching device is used for the compressed air that preceding working procedure is sent here is made the oxygen of high concentration.
Existing small-sized PSA system oxygen-enriching device, as the medical oxygen inspissator, the general pair adsorption towers that adopt, the stop valve of use lesser amt, its flow process control is fairly simple.Its course of work is to regulate the opening and closing of each valve, allows two adsorption towers alternately boost successively, all press, flushing and denitrogen, at boost phase the oxygen of enrichment is exported storage tank.In this course, the oxygen-rich concentration that enters product gas-reservoir groove is inconstant.When adsorption tower began to adsorb, product gas was that the concentration of oxygen rich air is lower, and along with adsorption tower boosts, the oxygen concentration of its product gas also improves gradually, and the oxygen concentration of its product gas reaches the highest when finishing until boosting.Though can boost to that output products gas is to storage tank when higher by the program control adsorption tower that makes, because its control device is simple, the concentration wave forward position is not very precipitous, so oxygen concentration still can not be very high.In addition, in rinse stage, if another adsorption tower is washed with product gas, then to reduce the output of product gas, if a part of gas bleed with the tower that boosts, because its oxygen concentration is not high, the concentration wave forward position was not bright and sharp when the adsorption tower that is rinsed was then boosted, and the product gas oxygen concentration of output will be not really high.
Task of the present utility model is to add cartridge control valve spare on above-mentioned system oxygen-enriching device, improving the oxygen concentration of product gas, or under identical oxygen concentration and improve the output of product gas.
Design of the present utility model is: a kind of system oxygen-enriching device, have two or more adsorption towers and a storage tank, the entrance point of each adsorption tower is provided with air inlet stop valve and discharge line valve, be connected to one between per two adsorption tower ports of export and all press a section last valve, it is characterized in that having between each adsorption tower and the storage tank check valve and cut upward valve connection, be connected between per two adsorption tower ports of export by four check valves and the bridge-type flushing draught damper group that the pressure lock-up valve is formed.
Be described further below in conjunction with embodiment of the present utility model and accompanying drawing thereof.
Accompanying drawing is the schematic diagram of an embodiment of the utility model.
As shown in the figure, embodiment of the present utility model has two adsorption towers 4 and 16 and storage tanks 5.Each adsorption tower 4 and 16 entrance point are provided with air inlet stop valve 3 and 17, are arranged in parallel discharge line valve 2 and 18 simultaneously, and last process is sent compressed air here and entered adsorption tower by pipeline 1 through the air inlet stop valve, discharge nitrogen in the absorption back that finishes by discharge line valve.Be connected to an equal pressure cutoff valve 10 between two adsorption towers 4 and 16.Above structure is identical with existing small-sized PSA system oxygen-enriching device, and its operation principle also is the same.Unique distinction of the present utility model be adsorption tower 4 and 16 and storage tank 5 between have check valve 7,15 and stop valve 6 to connect, replaced original two used stop valves, between two adsorption towers 4 and 16 ports of export adjunction by 8,9,11, the 14 and bridge-types that pressure lock-up valve 13 is formed flushings of four check valves draught damper group.For the flushing air-flow can be stablized, at choke valve 12 of pressure lock-up valve 13 exits serial connection.
The flow process control procedure of the foregoing description is, stop valve 2,3,10,17,18 opening and closing in the known manner, two adsorption towers 4,16 in turn by boost, all press, the order work of flushing, denitrogen.Set stop valve 3,18 and open, stop valve 2,10,17 is closed, and tower 4 is in the adsorbed state that boosts, and tower 16 then is in the depressurization desorption state.Have certain pressure in product gas (the being oxygen enrichment) storage tank 5 and fluctuate in reasonable range, setting its maximum pressure is P, generally can be a little less than the lock pressure P ' of pressure lock-up valve 13, pressure oscillation maximum Δ P.When the operating pressure of adsorption tower 4 during less than P-Δ P, then product-free gas enters storage tank 5, when tower 4 boosts to when being higher than P-Δ P, just has product gas input storage tank 5.Stop valve 6 is opening in the process of boosting, when reaching lock pressure P ' time, storage tank 5 internal pressures then are closed, pressure lock-up valve 13 is opened, and tower 4 just has gas to wash through the adsorption tower 16 that check valve 8, lock-up valve 13, choke valve 12,11 pairs on check valve are in the step-down state.
When the concentration wave forward position of tower 4 arrived its port of export, flushing was promptly accused and is finished, and close stop valve 3 and 18 this moment, opens equal pressure cutoff valve 10 and product gas stop valve 6, carries out all and press.All press to finish, the pressure of two adsorption towers 4,16 is 12P because check valve 7,15 is arranged, go up valve 6 and opened although cut, in the storage tank 5 and the product-free gas be back in the adsorption tower, just get ready for the air inlet in one step of back.Switch to tower 16 and boost this moment, and tower 4 step-down denitrogens are promptly closed equal pressure cutoff valve 10, opens air inlet stop valve 17 and discharge line valve 2, presses the said process circulation, just can constantly obtain oxygen enrichment and enter storage tank 5.
Because it is uneven that the oxygen concentration in the adsorption tower distributes, only the oxygen concentration in the concentration wave forward position is the highest, so adsorption tower leads to that the product gas outlet of storage tank should be arranged on that adsorption tower boosts at the end near its concentration wave forward position rather than foremost, preferably be positioned at 0.1 to 0.3 adsorption column length place, below, adsorption tower top, particular location is decided with lock pressure P '.
The opening program of above-mentioned each valve can realize that its operation principle also is applicable to the PSA device of a plurality of adsorption towers with known gas control, automatically controlled or timed unit.
Of the present utility modelly long-pending establish effect and be: the one, in big section that adsorption tower boosts in the time, in the storage tank Pressure, only has and works as so when boosting beginning, there is no gas product input storage tank greater than the adsorption tower internal pressure Adsorption column pressure just has product not have the input storage tank when being increased to greater than storage tank pressure, then adsorption tower and storage tank Boost simultaneously, the oxygen enrichment that therefore only has oxygen concentration to be tending towards peak enters storage tank; The 2nd, in flushing process The adsorption tower of pressure-increasning state is in the maximal pressure state, and the purge gas of output also is hyperoxia concentration, and this will make The adsorption tower of low-pressure state is when then boosting, and its concentration wave forward position becomes more bright and sharp, can improve gas product Oxygen concentration and the rate of recovery of oxygen; The 3rd, in the pressure equalizing: the gas product in the storage tank can not be back to suction Attached tower. What compared with prior art, can make same traffic is that the gas product of 90% oxygen concentration is brought up to originally 93% or make the gas product flow increase 10-15% keeping 90% oxygen concentration.
Claims (3)
1. make oxygen-enriching device for one kind, have two or more adsorption towers and a storage tank, the entrance point of each adsorption tower is provided with air inlet stop valve and discharge line valve, be connected to an equal pressure cutoff valve between per two adsorption tower ports of export, it is characterized in that having between each adsorption tower and the storage tank check valve and stop valve to connect, be connected between per two adsorption tower ports of export by four check valves and the bridge-type flushing draught damper group that the pressure lock-up valve is formed.
2. system oxygen-enriching device according to claim 1 is characterized in that the choke valve of pressure locking valve outlet port place's serial connection in the described bridge-type flushing draught damper group.
3. system oxygen-enriching device according to claim 1 is characterized in that adsorption tower is communicated with outlet and is positioned at 0.1 to 0.3 adsorption column length place, below, adsorption tower top with storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97206555 CN2277059Y (en) | 1997-02-19 | 1997-02-19 | Oxygen-enriched preparing appts. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97206555 CN2277059Y (en) | 1997-02-19 | 1997-02-19 | Oxygen-enriched preparing appts. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2277059Y true CN2277059Y (en) | 1998-03-25 |
Family
ID=33926523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97206555 Expired - Fee Related CN2277059Y (en) | 1997-02-19 | 1997-02-19 | Oxygen-enriched preparing appts. |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2277059Y (en) |
-
1997
- 1997-02-19 CN CN 97206555 patent/CN2277059Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |