CN113713566A - Gas production device, gas production method, and storage medium - Google Patents
Gas production device, gas production method, and storage medium Download PDFInfo
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- CN113713566A CN113713566A CN202111145886.5A CN202111145886A CN113713566A CN 113713566 A CN113713566 A CN 113713566A CN 202111145886 A CN202111145886 A CN 202111145886A CN 113713566 A CN113713566 A CN 113713566A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/053—Pressure swing adsorption with storage or buffer vessel
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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
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
- C01B21/045—Physical processing only by adsorption in solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/10—Nitrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/402—Further details for adsorption processes and devices using two beds
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- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Separation Of Gases By Adsorption (AREA)
Abstract
The invention relates to the technical field of gas separation, and discloses a gas preparation device, a gas preparation method and a storage medium. The gas preparation device comprises a compressed air buffer unit, a gas separation unit and a gas buffer unit which are sequentially communicated; the compressed air buffer unit includes: an air buffer tank; a main air inlet pipe; a main air outlet pipe; a bypass pipe; a control valve; a check valve; a first pressure transmitter for obtaining a gas pressure value of the bypass pipe or the gas separation unit; and a controller. This technical scheme can carry a large amount of raw materials compressed air to the adsorber at the initial stage of adsorbing, reduce simultaneously gaseous buffer tank to the nitrogen gas volume of adsorber back pressure, adsorber pressure can obtain promoting fast in the short-term to improve nitrogen gas output, overcome prior art's pressure swing adsorption nitrogen plant nitrogen production volume low, loss of pressure is big, acquisition cost and installation space big problem.
Description
Technical Field
The invention relates to the technical field of gas separation, in particular to a gas preparation device, a gas preparation method and a storage medium.
Background
As shown in fig. 1, the pressure swing adsorption nitrogen generator generally comprises a CG compressed air buffer unit, an NGN oxygen-nitrogen separation unit, and an NT nitrogen buffer unit. The CG compressed air buffer unit consists of an air buffer tank and a safety accessory; the NT nitrogen buffer unit comprises a nitrogen buffer tank, a safety accessory, a filter, an instrument, a program control valve and the like; the NGN oxygen-nitrogen separation unit is a core part of a nitrogen making device and comprises an absorber MS101(A), an absorber MS101(B), a silencer, a program control valve group, a control system and the like, wherein carbon molecular sieves used for oxygen absorption and nitrogen generation are filled in the absorber MS101(A) and the absorber MS101 (B). The NGN oxygen-nitrogen separation unit comprises three steps of pressure equalizing, adsorption and desorption in the working process, wherein two adsorbers of the MS101(A) and the MS101(B) alternately operate according to the pressure equalizing, adsorption and desorption sequence and a fixed period, and nitrogen is continuously conveyed to a tail end nitrogen buffer tank.
The adsorbers MS101(A) and MS101(B) are provided with air inlets, air outlets, pressure equalizing ports, pressure relief ports and program control valves. After the pressure equalizing step is completed, the pressure values in the adsorbers MS101(a) and MS101(B) are in a low state, and then the adsorption step is performed, and the adsorption step can be divided into an adsorption initial stage, an adsorption middle stage, and an adsorption final stage according to the pressure values of the adsorbers. At the moment, the programmable valves of the air inlet and the air outlet of the adsorber at the initial stage of adsorption are opened, and the programmable valves of the pressure equalizing port and the pressure relief port are closed. In view of the fact that the pressure values of the current air buffer tank and the current nitrogen buffer tank are high, the air buffer tank rapidly punches the absorber through the absorber air inlet program control valve, and the nitrogen buffer tank rapidly presses the absorber through the absorber air outlet program control valve, so that the air buffer tank, the absorber in the adsorption step and the nitrogen buffer tank are in a relative pressure balance state. Along with the raw material compressed air is continuously conveyed to the air buffer tank, one part of the raw material compressed air is used for improving the pressure of the air buffer tank, the other part of the raw material compressed air is conveyed to the adsorber through the air buffer tank, and the carbon molecular sieve performs oxygen absorption and nitrogen production. After the pressure of the adsorber in the adsorption step is higher than that of the nitrogen buffer tank, the adsorber in the adsorption step conveys nitrogen to the nitrogen buffer tank through the program control valve at the air outlet, so that the following adverse effects are likely to be caused. The adverse effects are mainly reflected in the following aspects:
(1) during the adsorption process step, a part of raw material compressed air is used for improving the pressure of the air buffer tank, and the other part of raw material compressed air is conveyed to the adsorber through the air buffer tank, so that the pressure of the adsorber in the adsorption process step rises slowly, and the nitrogen production amount of the nitrogen making device is low. During the adsorption process step, the nitrogen amount of the nitrogen buffer tank back-pressing the adsorber in the adsorption process step is too much, so that the valley pressure of the nitrogen output by the nitrogen buffer tank is low, and the pressure loss of the nitrogen making device is large.
(2) During the adsorption step, the nitrogen buffer tank back-presses the adsorber in the adsorption step to excessive nitrogen amount, which results in the increase of nitrogen adsorption amount by the carbon molecular sieve and the low nitrogen production amount of the nitrogen making device.
Disclosure of Invention
The invention aims to solve the technical problems of large pressure loss, low nitrogen yield, high acquisition cost and large installation space of a pressure swing adsorption nitrogen making device in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a gas preparation apparatus comprising a compressed air buffer unit, a gas separation unit, and a gas buffer unit, which are sequentially communicated; the compressed air buffer unit includes:
an air buffer tank having an air inlet A and an air outlet A;
one end of the main air inlet pipe is connected with the air inlet A;
one end of the main gas outlet pipe is connected with the gas outlet A, and the other end of the main gas outlet pipe is communicated with the gas separation unit;
one end of the bypass pipe is communicated with the main air inlet pipe, and the other end of the bypass pipe is communicated with the main air outlet pipe;
the control valve is arranged on the main air inlet pipe and is positioned between the joint of the main air inlet pipe and the air inlet and the joint of the main air inlet pipe and the bypass pipe; the control valve is used for controlling the gas flow of the main gas inlet pipe;
the check valve is arranged on the main air outlet pipe and is positioned between the joint of the main air outlet pipe and the air outlet and the joint of the main air outlet pipe and the bypass pipe; the check valve is used for preventing gas from flowing backwards into the air buffer tank;
a first pressure transmitter for obtaining a gas pressure value of the bypass pipe or the gas separation unit;
and the first pressure transmitter and the control valve are electrically connected with the controller.
Taking nitrogen preparation as an example, according to the technical scheme, when the gas preparation device is used for preparing gas, at the initial stage of adsorption, the compressed air in the air buffer tank and the compressed air passing through the bypass pipe connected in parallel with the air buffer tank rapidly stamp towards the gas separation unit, so that the pressure of the gas separation unit rapidly reaches the pressure condition for preparing nitrogen. And in the middle stage and the final stage of adsorption, acquiring a pressure signal through the first pressure transmitter, transmitting the pressure signal to the controller, automatically controlling the opening of the control valve through the controller, ensuring that a bypass pipe connected with the air buffer tank in parallel is in a high-pressure position to supply air to the adsorber, and punching redundant compressed air to the air buffer tank through the control valve.
Can solve from this and adsorb the initial stage and can carry a large amount of raw materials compressed air to the adsorber, reduce simultaneously gas buffer tank to the nitrogen gas volume of adsorber back pressure, atmospheric pressure in the adsorber can obtain promoting fast in the short time, improves the adsorption efficiency of adsorber to improve nitrogen gas output, overcome prior art's pressure swing adsorption nitrogen plant and produced the problem that the nitrogen volume is low, loss of pressure is big, acquisition cost and installation space are big.
Further, the first pressure transmitter is disposed at an end of the check valve.
Further, the gas separation unit comprises an adsorber capable of being filled with molecular sieves.
Further, the first pressure transmitter is arranged at a gas inlet B of the gas separation unit for acquiring a pressure at the gas inlet B.
Further, the gas buffer unit comprises a gas buffer tank with a gas inlet end and a gas outlet end.
Further, the gas buffer tank is provided with a first pressure gauge for acquiring the pressure in the gas buffer tank.
Further, the control valve is a solenoid valve or a proportional valve.
The second invention of the present invention provides a gas production method including the gas production apparatus, the gas production method including:
and supplying air into the gas separation unit through the compressed air buffer unit and maintaining the air pressure of the air inlet B of the gas separation unit at a set value.
Taking nitrogen preparation as an example, according to the technical scheme, when the gas preparation device is used for preparing gas, the control valve is closed at the initial stage of adsorption, and the compressed air in the air buffer tank and the compressed air passing through the bypass pipe connected in parallel with the air buffer tank rapidly stamp towards the gas separation unit, so that the pressure of the gas separation unit rapidly reaches the pressure condition for preparing nitrogen. And in the middle stage and the final stage of adsorption, acquiring a pressure signal through the first pressure transmitter, transmitting the pressure signal to the controller, automatically controlling the opening of the control valve through the controller, ensuring that a bypass pipe connected with the air buffer tank in parallel is in a high-pressure position to supply air to the adsorber, and punching redundant compressed air to the air buffer tank through the control valve.
Can solve from this and adsorb the initial stage and can carry a large amount of raw materials compressed air to the adsorber, reduce simultaneously gas buffer tank to the nitrogen gas volume of adsorber back pressure, atmospheric pressure in the adsorber can obtain promoting fast in the short time, improves the adsorption efficiency of adsorber to improve nitrogen gas output, overcome prior art's pressure swing adsorption nitrogen plant and produced the problem that the nitrogen volume is low, loss of pressure is big, acquisition cost and installation space are big.
Further, the air conditioner is provided with a fan,
controlling the opening of the control valve by the controller;
when the pressure value detected by the first pressure transmitter is smaller than a set value, the opening degree of the control valve is reduced, and gas is supplied to the gas separation unit through the bypass pipe; when the pressure value that first pressure transmitter detected is greater than the setting value, increase the aperture of control valve, through the bypass pipe to the gas separation unit air feed, simultaneously through main intake pipe to air buffer tank in the gas storage, until when the air buffer tank pressure value is higher than the setting value, the air buffer tank pass through main outlet duct to the gas separation unit air feed.
A third aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the gas preparation method.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a schematic diagram of a prior art pressure swing adsorption nitrogen plant;
FIG. 2 is a schematic view of one embodiment of a gas production apparatus of the present invention.
Description of the reference numerals
1-a compressed air buffer unit; 2-a gas separation unit; 3-a gas buffer unit; 11-air buffer tank; 12-a main inlet pipe; 13-main outlet pipe; 14-a bypass pipe; 15-a control valve; 16-a check valve; 17-a first pressure transmitter; 18-a second pressure gauge; 31-gas buffer tank; 32-a first pressure gauge; 22-third pressure gauge.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of the terms of orientation such as "upper and lower" in the case where no description is made to the contrary generally means the orientation in the assembled and used state. "inner and outer" refer to the inner and outer contours of the respective component itself.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, in the prior art, a pressure swing adsorption nitrogen generator generally comprises a CG compressed air buffer unit, an NGN oxygen-nitrogen separation unit, and an NT nitrogen buffer unit. The CG compressed air buffer unit consists of an air buffer tank and a safety accessory; the NT nitrogen buffer unit comprises a nitrogen buffer tank, a safety accessory, a filter, an instrument, a program control valve and the like; the NGN oxygen-nitrogen separation unit is a core part of a nitrogen making device and comprises an absorber MS101(A), an absorber MS101(B), a silencer, a program control valve group, a control system and the like, wherein carbon molecular sieves used for oxygen absorption and nitrogen generation are filled in the absorber MS101(A) and the absorber MS101 (B). The NGN oxygen-nitrogen separation unit comprises three steps of pressure equalizing, adsorption and desorption in the working process, wherein two adsorbers of the MS101(A) and the MS101(B) alternately operate according to the pressure equalizing, adsorption and desorption sequence and a fixed period, and nitrogen is continuously conveyed to a tail end nitrogen buffer tank.
The adsorbers MS101(A) and MS101(B) are provided with air inlets, air outlets, pressure equalizing ports, pressure relief ports and program control valves. After the pressure equalizing step is completed, the pressure values in the adsorbers MS101(a) and MS101(B) are in a low state, and then the adsorption step is performed, and the adsorption step can be divided into an adsorption initial stage, an adsorption middle stage, and an adsorption final stage according to the pressure values of the adsorbers. At the moment, the programmable valves of the air inlet and the air outlet of the adsorber at the initial stage of adsorption are opened, and the programmable valves of the pressure equalizing port and the pressure relief port are closed. In view of the fact that the pressure values of the current air buffer tank and the current nitrogen buffer tank are high, the air buffer tank rapidly punches the absorber through the absorber air inlet program control valve, and the nitrogen buffer tank rapidly presses the absorber through the absorber air outlet program control valve, so that the air buffer tank, the absorber in the adsorption step and the nitrogen buffer tank are in a relative pressure balance state. Along with the raw material compressed air is continuously conveyed to the air buffer tank, one part of the raw material compressed air is used for improving the pressure of the air buffer tank, the other part of the raw material compressed air is conveyed to the adsorber through the air buffer tank, and the carbon molecular sieve performs oxygen absorption and nitrogen production. After the pressure of the adsorber in the adsorption step is higher than that of the nitrogen buffer tank, the adsorber in the adsorption step conveys nitrogen to the nitrogen buffer tank through the program control valve at the air outlet, so that the following adverse effects are likely to be caused. The adverse effects are mainly reflected in the following aspects:
(1) during the adsorption process step, a part of raw material compressed air is used for improving the pressure of the air buffer tank, and the other part of raw material compressed air is conveyed to the adsorber through the air buffer tank, so that the pressure of the adsorber in the adsorption process step rises slowly, and the nitrogen production amount of the nitrogen making device is low. During the adsorption process step, the nitrogen amount of the nitrogen buffer tank back-pressing the adsorber in the adsorption process step is too much, so that the valley pressure of the nitrogen output by the nitrogen buffer tank is low, and the pressure loss of the nitrogen making device is large.
(2) During the adsorption step, the nitrogen buffer tank back-presses the adsorber in the adsorption step to excessive nitrogen amount, which results in the increase of nitrogen adsorption amount by the carbon molecular sieve and the low nitrogen production amount of the nitrogen making device.
The pressure swing adsorption nitrogen making device aims at solving the problems that a pressure swing adsorption nitrogen making device in the prior art is large in pressure loss, low in nitrogen production quantity, high in acquisition cost and large in installation space. The present invention provides, in a first aspect, a gas preparation apparatus including a compressed air buffer unit 1, a gas separation unit 2, and a gas buffer unit 3, which are sequentially communicated, as shown in fig. 2. The compressed air buffer unit 1 includes an air buffer tank 11, a main air inlet pipe 12, a main air outlet pipe 13, a bypass pipe 14, a control valve 15, a check valve 16, a first pressure transmitter 17, and a controller.
The air buffer tank 11 has an air inlet a and an air outlet a. One end of the main intake pipe 12 is connected to the intake port a. One end of the main air outlet pipe 13 is connected with the air outlet A, and the other end of the main air outlet pipe is communicated with the gas separation unit. One end of the bypass pipe 14 is communicated with the main air inlet pipe 12, and the other end is communicated with the main air outlet pipe 13. The control valve 15 is disposed on the main intake pipe 12 between a connection point of the main intake pipe 12 and the intake port and a connection point of the main intake pipe 12 and the bypass pipe 14. The control valve 15 is used for controlling the gas flow of the main gas inlet pipe 12, and optionally, the control valve is a solenoid valve or a proportional valve. The check valve 16 is disposed on the main outlet pipe 13 between a connection between the main outlet pipe 13 and the exhaust port and a connection between the main outlet pipe 13 and the bypass pipe 14. The check valve 16 prevents the reverse flow of gas into the air buffer tank 11. The first pressure transmitter 17 is used to obtain the gas pressure value of the bypass line 14 or the gas separation unit 2. The first pressure transmitter 17 and the control valve 15 are both electrically connected to the controller.
Since the bypass pipe 14, the gas separation unit 2 and the main outlet pipe 13 are all in communication with each other, in particular, they can be communicated through a three-way pipe. In practice there will be some difference in gas pressure in the bypass duct 14, the gas separation unit 2 and the main outlet duct 13. In order to make the pressure values obtained by the first pressure transmitter 17 more accurate, in a preferred embodiment said first pressure transmitter 17 is arranged at the gas inlet B of said gas separation unit 2 or at the end of said check valve 11.
Further, the gas separation unit 2 comprises an adsorber 21 capable of being filled with molecular sieves; the adsorber 21 is provided with a third pressure gauge 22 for acquiring the pressure in the adsorber 21, and the third pressure gauge 22 is used for acquiring the pressure in the adsorber 21. The gas buffer unit 3 comprises a gas buffer tank 31 having an inlet end and an outlet end. The gas buffer tank 31 is provided with a first pressure gauge 32 for acquiring the pressure in the gas buffer tank 31.
Taking nitrogen preparation as an example, filling the adsorber 21 with a carbon molecular sieve, and according to the above technical scheme, when the gas preparation device is used for preparing nitrogen, in the initial stage of adsorption, rapidly punching the compressed air in the air buffer tank 11 and the compressed air in the bypass pipe 14 connected in parallel with the air buffer tank 11 to the gas separation unit 2 together, so that the pressure of the gas separation unit 2 can rapidly reach the pressure condition for preparing nitrogen. In the middle stage and the final stage of adsorption, the pressure signal at the air inlet B is obtained by the first pressure transmitter 17, and is transmitted to a controller (not shown in the figure), the opening of the control valve 15 is automatically controlled by the controller, so that the bypass pipe 14 connected in parallel with the air buffer tank 11 is ensured to be at a high pressure level to supply air to the adsorber 21, and the redundant compressed air is pressed to the air buffer tank 11 through the control valve 15.
Therefore, the gas preparation device of the invention can solve the problem that a large amount of raw material compressed air is conveyed to the adsorber 21 in the initial adsorption stage, simultaneously reduce the nitrogen amount of the back pressure of the gas buffer tank 31 to the adsorber 21, quickly increase the pressure of the adsorber 21 in a short time, improve the adsorption efficiency of the adsorber 21 and further improve the nitrogen yield. It overcomes the defects of low nitrogen yield and large pressure loss of the pressure swing adsorption nitrogen making device in the prior art.
If the technical problem that prior art exists is solved to the mode that adopts to increase air buffer tank 11, then will increase by a wide margin air buffer tank 11 volume leads to nitrogen making device acquisition cost height from this, and installation space is big. Therefore, the technical scheme of the invention can reduce the purchase cost of the nitrogen production device and solve the problem of large installation space in the prior art.
The second invention of the present invention provides a gas production method including the gas production apparatus, the gas production method including:
the compressed air buffer unit 1 supplies air into the gas separation unit 2 and maintains the gas pressure in the gas separation unit 2 at a set value. Specifically, the opening degree of the control valve 15 is controlled by the controller; when the pressure value detected by the first pressure transmitter 17 is less than a set value, the opening degree of the control valve 15 is reduced, and gas is supplied to the gas separation unit 2 through the bypass pipe 14; when the pressure value that first pressure transmitter 17 detected is greater than the setting value, the increase the aperture of control valve 15, through bypass pipe 14 to gas separation unit 2 air feed, simultaneously pass through main intake pipe 12 gas storage in the air buffer tank 11, until when the air buffer tank 11 pressure value is higher than or reaches the setting value, air buffer tank 11 pass through main outlet duct 13 to gas separation unit 2 air feed.
The "reducing the opening degree of the control valve 15" includes both reducing the opening degree of the control valve 15 and adjusting the opening degree of the control valve 15 to zero (i.e., closing the opening degree of the control valve).
Taking nitrogen preparation as an example, filling the adsorber 21 with a carbon molecular sieve, and according to the above technical scheme, when the gas preparation device is used for preparing nitrogen, in the initial stage of adsorption, rapidly punching the compressed air in the air buffer tank 11 and the compressed air in the bypass pipe 14 connected in parallel with the air buffer tank 11 to the gas separation unit 2 together, so that the pressure of the gas separation unit 2 can rapidly reach the pressure condition for preparing nitrogen. In the middle stage and the final stage of adsorption, the first pressure transmitter 17 acquires a pressure signal at the air inlet B and transmits the pressure signal to a controller, not shown in the figure, and the controller automatically controls the opening of the control valve 15 to ensure that the bypass pipe 14 connected in parallel with the air buffer tank 11 is at a high pressure level to supply air to the adsorber 21, and the redundant compressed air is pressed to the air buffer tank 11 through the control valve 15.
Therefore, the gas preparation device of the invention can solve the problem that a large amount of raw material compressed air is conveyed to the adsorber 21 in the initial adsorption stage, simultaneously reduce the nitrogen amount of the back pressure of the gas buffer tank 31 to the adsorber 21, quickly increase the pressure of the adsorber 21 in a short time, improve the adsorption efficiency of the adsorber 21 and further improve the nitrogen yield. It overcomes the defects of low nitrogen yield and large pressure loss of the pressure swing adsorption nitrogen making device in the prior art.
If the technical problem that prior art exists is solved to the mode that adopts to increase air buffer tank 11, then will increase by a wide margin air buffer tank 11 volume leads to nitrogen making device acquisition cost height from this, and installation space is big. Therefore, the technical scheme of the invention can reduce the purchase cost of the nitrogen production device and solve the problem of large installation space in the prior art.
It should be noted that the gas preparation device and the gas preparation method of the present invention are not only suitable for preparing nitrogen gas, but also can prepare other gases, and only need to replace the corresponding molecular sieve.
A third aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the gas preparation method.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A gas preparation device, characterized in that it comprises a compressed air buffer unit (1), a gas separation unit (2) and a gas buffer unit (3) in sequential communication; the compressed air buffer unit (1) comprises:
an air buffer tank (11) having an air inlet A and an air outlet A;
a main intake pipe (12) having one end connected to the intake port A;
a main gas outlet pipe (13), one end of which is connected with the gas outlet A and the other end of which is communicated with the gas separation unit;
a bypass pipe (14) having one end communicated with the main intake pipe (12) and the other end communicated with the main outlet pipe (13);
the control valve (15) is arranged on the main air inlet pipe (12) and is positioned between the connection part of the main air inlet pipe (12) and the air inlet and the connection part of the main air inlet pipe (12) and the bypass pipe (14); the control valve (15) is used for controlling the gas flow of the main gas inlet pipe (12);
the check valve (16) is arranged on the main air outlet pipe (13) and is positioned between the joint of the main air outlet pipe (13) and the air outlet and the joint of the main air outlet pipe (13) and the bypass pipe (14); the check valve (16) is used for preventing gas from flowing backwards into the air buffer tank (11);
-a first pressure transmitter (17) for obtaining a gas pressure value of the bypass pipe (14) or the gas separation unit (2);
a controller, the first pressure transmitter (17) and the control valve (15) both being electrically connected with the controller.
2. The gas preparation device according to claim 1, wherein the first pressure transmitter (17) is arranged at the end of the non-return valve (16).
3. The gas production plant according to claim 1, wherein the gas separation unit (2) comprises an adsorber (21) which can be filled with molecular sieves.
4. The gas preparation apparatus according to claim 3, wherein the first pressure transmitter (17) is arranged at a gas inlet B of the gas separation unit (2) for acquiring a pressure at the gas inlet B.
5. The gas preparation apparatus according to claim 1, wherein the gas buffer unit (3) comprises a gas buffer tank (31) having a gas inlet end and a gas outlet end.
6. The gas preparation apparatus according to claim 5, wherein the gas buffer tank (31) is provided with a first pressure gauge (32) for obtaining the pressure inside the gas buffer tank (31).
7. The gas preparation device according to claim 1, wherein the control valve (15) is a solenoid valve or a proportional valve.
8. A gas production method comprising the gas production apparatus of any one of claims 1 to 7, the gas production method comprising:
and supplying air into the gas separation unit (2) through the compressed air buffer unit (1) and maintaining the air pressure of an air inlet B of the gas separation unit (2) at a set value.
9. The gas production method according to claim 8, characterized in that:
controlling the opening of the control valve (15) by the controller;
when the pressure value detected by the first pressure transmitter (17) is smaller than a set value, reducing the opening degree of the control valve (15), and supplying gas to the gas separation unit (2) through the bypass pipe (14); when the pressure value that first pressure transmitter (17) detected is greater than the setting value, the increase the aperture of control valve (15), through bypass pipe (14) to gas separation unit (2) air feed, pass through simultaneously main intake pipe (12) to store gas in air buffer tank (11), until when air buffer tank (11) pressure value is higher than the setting value, air buffer tank (11) pass through main outlet duct (13) to gas separation unit (2) air feed.
10. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a gas preparation method as claimed in any one of claims 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111145886.5A CN113713566A (en) | 2021-09-28 | 2021-09-28 | Gas production device, gas production method, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111145886.5A CN113713566A (en) | 2021-09-28 | 2021-09-28 | Gas production device, gas production method, and storage medium |
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| Publication Number | Publication Date |
|---|---|
| CN113713566A true CN113713566A (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111145886.5A Pending CN113713566A (en) | 2021-09-28 | 2021-09-28 | Gas production device, gas production method, and storage medium |
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| Country | Link |
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2021
- 2021-09-28 CN CN202111145886.5A patent/CN113713566A/en active Pending
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