CN212403472U - Helium recovery and purification device - Google Patents
Helium recovery and purification device Download PDFInfo
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- CN212403472U CN212403472U CN202021040494.3U CN202021040494U CN212403472U CN 212403472 U CN212403472 U CN 212403472U CN 202021040494 U CN202021040494 U CN 202021040494U CN 212403472 U CN212403472 U CN 212403472U
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Abstract
The utility model discloses a helium recovery and purification device, which comprises a recovery gas tank, a recovery compression pump, a gas membrane separator, a gas purification tower and a vacuum pump; an inlet pipeline of the recovery compression pump is connected with a recovery gas tank, a first pressure transmitter is installed on the recovery gas tank, a first mass flow controller is installed on the inlet pipeline of the recovery gas tank, and an inlet of the first mass flow controller is connected with a helium recovery scene; the outlet pipeline of the recovery compression pump is connected with the gas membrane separator, the outlet pipeline of the gas membrane separator is connected with the gas purification tower, the gas purification tower is not less than two groups, all the groups are connected in parallel, the gas flow direction of each group of gas purification tower is controlled by a control valve, the inlet pipeline of the gas purification tower is connected with the vacuum pump, and the outlet pipeline is connected with the second mass flow control meter. The utility model discloses a membrane + pressure swing adsorption's composite method can accomplish the recovery and the purification operation to the low concentration's of complicated operating mode helium, hydrogen, neon etc. recovery efficiency is high, purity is high.
Description
Technical Field
The utility model relates to a helium recovery purification device.
Background
Helium is a colorless and odorless inert gas, and is widely used in various industrial fields such as optical fiber manufacturing, semiconductor production, metal manufacturing, welding, leak detection and the like. Although the helium has wide application and large usage amount, the helium has limited sources and is a scarce strategic resource. Helium content in air is about 5ppm, has no extraction value basically, is mainly derived from associated gas recovery in natural gas exploitation at present, and meanwhile, helium is a global strategic resource, reserves are limited, and export control of main production countries is tightened day by day. Therefore, the method has great significance for recycling helium which is a scarce resource which is not suitable for obtaining.
At present, there is a patent "an on-line helium recovery and purification apparatus" (publication No. CN108328588A), which includes a recovery device and a purification device; the recovery device comprises a recovery gas tank and a vacuum pump; the purification device comprises a heat exchanger, a filter, a primary membrane separator, a secondary membrane separator and a helium concentration detector; this patent is retrieved helium or helium-containing gas mixture and is supercharged through the effect of vacuum pump down, through the heat exchanger, after the filter dust removal dewatering, again through membrane separator and purification edulcoration, and detect helium concentration through helium concentration detector, reach and supply with mass flow meter MFC and reuse with helium equipment through the A route after setting for the standard, reach the helium that does not reach the setting for the standard and carry out purification once more in returning the recovery gas jar through the B route, thereby the concentration and the impurity content of having guaranteed equipment purification back helium are up to standard, avoid using unqualified helium with helium equipment. The patent only adopts a two-stage membrane separation technology (single membrane treatment mode), and the separation effect is poor.
In another patent, "a helium recovery and purification device" (publication number CN206156757U) includes a flow meter, a primary filter, a vacuum pump, a compressor, a precision filter, a first buffer tank, an adsorption system, a second buffer tank, and a cryogenic tower, which are connected in sequence; the adsorption system comprises at least 2 groups of adsorption columns which are connected in series, and at least three groups of heat exchangers which are connected in series are arranged in the cryogenic tower, so that the purity of the purified helium is more than or equal to 99.999%. This patent discloses the use of a gas adsorption column, but only for the removal of water and carbon dioxide.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a helium recovery purification device.
In order to realize the purpose, the helium recovery and purification device comprises a recovery gas tank, a recovery compression pump, a gas membrane separator, a gas purification tower and a vacuum pump;
an inlet pipeline of the recovery compression pump is connected with a recovery gas tank, a first pressure transmitter is installed on the recovery gas tank, a first mass flow controller is installed on the inlet pipeline of the recovery gas tank, and an inlet of the first mass flow controller is connected with a helium recovery scene;
the system comprises a recovery compression pump, a gas membrane separator, a gas purification tower, a control valve, a vacuum pump, a mass flow controller II and a control valve, wherein an outlet pipeline of the recovery compression pump is connected with the gas membrane separator, an outlet pipeline of the gas membrane separator is connected with the gas purification tower, the gas purification tower is not less than two groups, the groups are connected in parallel, the gas purification tower controls the gas flow direction through the control valve, an inlet pipeline of the gas purification tower is connected with the vacuum pump for regeneration.
As an improvement, a gas one-way valve is arranged on a pipeline between the recovery compression pump and the recovery gas tank.
And as an improvement, a second pressure transmitter is arranged on a pipeline connecting each group of gas purification towers with the second mass flow controller.
As an improvement, the recovery compression pump adopts an oil-free or oil-lubricated compressor, the recovery negative pressure of the recovery compression pump is more than or equal to 100mbar, and the outlet pressure is less than or equal to 8 bar.
As an improvement, a first pressure transmitter arranged on the recovery gas tank and a first mass flow controller arranged on the inlet pipeline are matched to realize an interlocking function, so that the negative pressure environment of the recovery gas tank is maintained.
As an improvement, any one of a molecular sieve, activated carbon or a filtering mechanism is filled in the gas purification tower, and at least one group of gas redistribution devices is arranged in each group of gas purification towers.
As an improvement, the control valve adopts any one of an electromagnetic valve, a pneumatic valve and an electric valve.
As an improvement, one of a back pressure valve, a throttle valve or an electric control proportional valve is arranged at the tail gas outlet of the gas membrane separator.
Compared with the prior art, the utility model discloses a membrane + pressure swing adsorption's set composite can accomplish the recovery and the purification operation to the low concentration's of complicated operating mode helium, hydrogen, neon etc. can purify to more than 99.9% with helium, hydrogen, neon etc. after retrieving, has advantages such as recovery efficiency height, purification back gas purity height, effectively reduces the consumption of helium, hydrogen, neon etc..
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. the device comprises a first mass flow control meter 2, a first pressure transmitter 3, a recovery gas tank 4, a recovery compression pump 5, a gas membrane separator 6, a back pressure valve 7, a control valve 8, a vacuum pump 9, a gas purification tower 10, a second pressure transmitter 11 and a second mass flow control meter.
Detailed Description
The following examples are further illustrative of the present invention as to the technical content of the present invention, but the essential content of the present invention is not limited to the following examples, and those skilled in the art can and should understand that any simple changes or substitutions based on the essential spirit of the present invention should belong to the protection scope of the present invention.
As shown in fig. 1, a helium recovery and purification device comprises a recovery gas tank 3, a recovery compression pump 4, a gas membrane separator 5, a gas purification tower 9 and a vacuum pump 8;
an inlet pipeline of the recovery compression pump 4 is connected with a recovery gas tank 3, a first pressure transmitter 2 is installed on the recovery gas tank 3, a first mass flow controller 1 is installed on an inlet pipeline of the recovery gas tank 3, and an inlet of the first mass flow controller 1 is connected with a helium recovery scene;
the outlet pipeline of the recovery compression pump 4 is connected with the gas membrane separator 5, the outlet pipeline of the gas membrane separator 5 is connected with the gas purification tower 9, the gas purification towers 9 are not less than two groups, the groups are connected in parallel, the gas purification towers 9 of each group control the gas flow direction through the control valve 7, the inlet pipeline of the gas purification tower 9 is connected with the vacuum pump 8, the gas purification tower 9 is regenerated by the vacuum pump 8, and the outlet pipeline of the gas purification tower 9 is connected with the mass flow controller II 11.
As a modification of the embodiment, a gas check valve is arranged on a pipeline between the recovery compression pump 4 and the recovery gas tank 3 to ensure the flow direction of gas. A first mass flow controller 1 arranged on an inlet pipeline of the recycling gas tank 3 and used for measuring the amount of recycled gas, and a gas content detecting instrument arranged at the upstream or downstream of a connecting pipeline of the first mass flow controller 1 and used for detecting the components and the content of the recycled gas in real time; in addition, the mass flow controller 1 can be replaced by a flowmeter, a flow meter, a proportional solenoid valve and the like.
As a modification of the embodiment, a second pressure transmitter 10 is installed on the pipeline connecting each group of gas purifying towers 9 and a second mass flow controller 11.
As an improvement of the embodiment, the recovery compression pump 4 adopts an oil-free or oil-lubricated compressor, the recovery negative pressure of the recovery compression pump 4 is more than or equal to 100mbar, and the outlet pressure is less than or equal to 8 bar.
As an improvement of the embodiment, the first pressure transmitter 2 installed on the recovery gas tank 3 and the first mass flow controller 1 installed on the inlet pipeline are matched to realize an interlocking function, that is, when the value of the first pressure transmitter 2 is smaller, the opening degree of the first mass flow controller 1 is reduced, and when the value of the first pressure transmitter 2 is larger, the opening degree of the first mass flow controller 1 is increased, so that the purpose of real-time dynamic adjustment is achieved, the recovery gas tank 3 is maintained in a negative pressure environment with constant pressure, and the recovery efficiency is improved.
As an improvement of the embodiment, a connecting pipeline between the recovery compression pump 4 and the gas membrane separator 5 can be provided with pressure, temperature and content detecting instruments and the like; the tail gas outlet of the gas membrane separator 5 adjusts the process state of the gas membrane separator 5 through a back pressure valve 6 or a throttle valve, in addition, the back pressure valve 6 or the throttle valve can be replaced by an electric control proportional valve; the gas permeation outlet of the gas membrane separator 5 is connected to the gas purification tower 9 through a pipeline, and a pressure, temperature and content detecting instrument and the like can be arranged on the pipeline between the gas permeation outlet and the gas purification tower.
The gas purifying tower 9 can be two groups, three groups, four groups or even more groups, and the gas purifying tower 9 controls the switching and regeneration operation between the gas flow direction and the gas purifying tower by the control valves 7 with different numbers; the control valve 7 can adopt valves such as an electromagnetic valve, a pneumatic valve, an electric valve and the like.
Any one of a molecular sieve, activated carbon or a filtering mechanism is filled in the gas purifying tower 9, and at least one group of gas redistribution devices is arranged in each group of gas purifying tower 9.
And a pipeline between the gas purification tower 9 and the second mass flow controller 11 is provided with pressure, temperature and gas content detecting instruments and the like. The utility model discloses a gaseous purification tower 9 that uses can effectively deviate from a series of impurities such as nitrogen, oxygen, argon, water, carbon dioxide, and gaseous purification tower works under normal atmospheric temperature environment completely moreover.
Finally, the utility model discloses a helium recovery purification device, the inside parameter of device and data acquisition, control etc. are accomplished control by PLC, logic circuit etc..
The utility model discloses based on membrane (adopting polymer hollow fiber membrane, the membrane material is polymer materials such as polysulfone, polyamide) + pressure swing adsorption's composite method usually, wherein, pressure swing adsorption indicates that the compression is adsorbed on the adsorbent by the separation component in the purifying column (the purifying column adopts filling such as molecular sieve, active carbon usually), desorbs out from the adsorbent again through the decompression, the utility model discloses well vacuum pump lets by the desorption of adsorption component for the decompression, through the change process of this kind of pressurization absorption-decompression desorption, accomplishes the separation and purification. The utility model discloses in adopt more than two purifying towers, be exactly for when a purifying tower is in desorption process, have another purifying tower to drop into adsorption work in real time at least.
Example 1
Adopt the utility model discloses a helium recovery purification device and method, the recovery volume is 18.2L/min, retrieve helium content and be 38.0% (all the other is the air), through the recovery compression pump 4 pressure boost, the separation of hollow fiber membrane separator, gas purification tower 9 purification back, can produce the purity and be 99.9% helium, the gas capacity is 6.8L/min after the purification, whole device and technological process purification rate are more than 98% through the calculation (calculating method is 6.8 x 0.999/(18.2 x 0.38)). The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (8)
1. The helium recovery and purification device is characterized by comprising a recovery gas tank (3), a recovery compression pump (4), a gas membrane separator (5), a gas purification tower (9) and a vacuum pump (8);
an inlet pipeline of the recovery compression pump (4) is connected with a recovery gas tank (3), a first pressure transmitter (2) is installed on the recovery gas tank (3), a first mass flow controller (1) is installed on an inlet pipeline of the recovery gas tank (3), and an inlet of the first mass flow controller (1) is connected with a helium recovery scene;
the gas purification device is characterized in that an outlet pipeline of the recovery compression pump (4) is connected with the gas membrane separator (5), an outlet pipeline of the gas membrane separator (5) is connected with the gas purification tower (9), the gas purification tower (9) is not less than two groups, all the groups are connected in parallel, each group of gas purification tower (9) controls the gas flow direction through the control valve (7), an inlet pipeline of the gas purification tower (9) is connected with the vacuum pump (8) for regeneration, and an outlet pipeline is connected with the mass flow control meter II (11).
2. The helium recovery and purification device as claimed in claim 1, wherein a gas check valve is installed on the pipeline between the recovery compression pump (4) and the recovery gas tank (3).
3. The helium recovery and purification device as claimed in claim 1, wherein a second pressure transmitter (10) is installed on the pipeline connecting each group of gas purification towers (9) and the second mass flow controller (11).
4. The helium recovery and purification device of claim 1, wherein the recovery compression pump (4) adopts an oil-free or oil-lubricated compressor, the recovery negative pressure of the recovery compression pump (4) is not less than 100mbar, and the outlet pressure is not more than 8 bar.
5. The helium recovery and purification device as claimed in claim 1, wherein the pressure transmitter (2) installed on the recovery gas tank (3) and the mass flow control meter (1) installed on the inlet pipeline cooperate to realize an interlocking function, so as to maintain the negative pressure environment of the recovery gas tank (3).
6. The helium recovery and purification device according to claim 1, wherein the gas purification columns (9) are internally filled with any one of molecular sieves, activated carbon or filtering mechanisms, and at least one set of gas redistribution devices is arranged in each set of gas purification columns (9).
7. The helium recovery and purification device as claimed in claim 1, wherein the control valve (7) is any one of a solenoid valve, a pneumatic valve and an electric valve.
8. A helium recovery and purification device as claimed in claim 1, wherein the off-gas outlet of said gas membrane separator (5) is fitted with one of a back pressure valve (6), a throttle valve or an electrically controlled proportional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021040494.3U CN212403472U (en) | 2020-06-09 | 2020-06-09 | Helium recovery and purification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021040494.3U CN212403472U (en) | 2020-06-09 | 2020-06-09 | Helium recovery and purification device |
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| CN212403472U true CN212403472U (en) | 2021-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573643A (en) * | 2020-06-09 | 2020-08-25 | 安徽中科皖能科技有限公司 | Helium recovery and purification device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573643A (en) * | 2020-06-09 | 2020-08-25 | 安徽中科皖能科技有限公司 | Helium recovery and purification device and method |
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