CN116272250A - Pressure swing adsorption gas separation device and preparation method - Google Patents

Pressure swing adsorption gas separation device and preparation method Download PDF

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Publication number
CN116272250A
CN116272250A CN202310053862.XA CN202310053862A CN116272250A CN 116272250 A CN116272250 A CN 116272250A CN 202310053862 A CN202310053862 A CN 202310053862A CN 116272250 A CN116272250 A CN 116272250A
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nitrogen
pressure swing
swing adsorption
gas separation
ngn
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胡金国
何锦杰
刘海龙
吴仁杰
郑湘渊
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Shanghai Ruiqi Gas Technology Co ltd
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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

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Abstract

The invention discloses a pressure swing adsorption gas separation device and a preparation method thereof, comprising the following steps: the pressure swing adsorption gas separation device comprises an NGN oxygen-nitrogen separation unit and a plurality of sets of NT nitrogen buffer units, wherein the NGN oxygen-nitrogen separation unit comprises an absorber MS101A and an absorber MS101B, and the NT nitrogen buffer units comprise an adsorption tower and the adsorption tower is provided with an air inlet and a plurality of air outlets. The invention provides another gas separation device for preparing two or more product gases with different purities. Specifically taking a pressure swing adsorption nitrogen production device as an example, the device mainly comprises an NGN oxygen-nitrogen separation unit and a plurality of NT nitrogen buffer units. Wherein the NGN oxygen-nitrogen separation unit is identical with the structure of the nitrogen production device for producing single purity, and comprises an absorber MS101A and an absorber MS101B, wherein the absorber is filled with an adsorbent, and the total amount G thereof Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n And (3) summing.

Description

Pressure swing adsorption gas separation device and preparation method
Technical Field
The invention relates to the technical field of pressure swing adsorption gas separation, in particular to a pressure swing adsorption gas separation device and a preparation method.
Background
Pressure Swing Adsorption (PSA) is a convenient gas separation technique that uses the difference in the "adsorption" properties of a fixed bed layer loaded with an adsorbent to different gas molecules to separate a gas mixture. The working process of the device is as follows: when one tower filled with adsorbent (abbreviated as adsorption tower) is used for producing gas under the condition of increasing pressure, the other adsorption tower is used for desorbing and regenerating at the condition of emptying and reducing pressure, the working modes of the two towers are switched through a fixed adsorption period, each tower is used for completing one-time gas production and desorption regeneration, namely one adsorption period, and thus the operation is alternately circulated, and the product gas is continuously produced. In the pressure swing adsorption device, only a single purity product gas can be prepared by the device when the air supply amount of the device is unchanged in a fixed adsorption period.
The existing multi-purity gas separation device has complex structure and high cost, and each gas outlet is required to be provided with a set of gas taking device inside the adsorption tower, so that the gas outlet is relatively uniform in gas taking; meanwhile, the pipeline with the program control valve is arranged at the air outlet to realize the mutual switching and pressure equalizing process of the adsorption towers, the capacity of the existing multi-purity gas separation device is single and fixed, and flexibility is lacking, because the position of the air outlet of the existing separation device directly influences the capacity of the air outlet, the positions of the air outlets of the adsorption towers aiming at different purity requirements can be different, and after the technological requirements of users change, the device is difficult to adjust to adapt to the new requirements of the users. Therefore, a new solution is needed.
Disclosure of Invention
The invention aims to provide a pressure swing adsorption gas separation device and a preparation method, which solve the problems that the existing multi-purity gas separation device is complex in structure and high in cost, and a set of gas taking device is required to be arranged in an adsorption tower at each gas outlet, so that the gas taking of the gas outlet is relatively uniform; meanwhile, the pipeline with the program control valve is arranged at the air outlet to realize the mutual switching and pressure equalizing process of the adsorption towers, the capacity of the existing multi-purity gas separation device is single and fixed, and flexibility is lacking, because the position of the air outlet of the existing separation device directly influences the capacity of the air outlet, the positions of the air outlets of the adsorption towers aiming at different purity requirements can be different, and when the technological requirements of users change, the device is difficult to adjust to adapt to the new requirements of the users.
In order to achieve the above purpose, the present invention provides the following technical solutions: a pressure swing adsorption gas separation device and a preparation method thereof comprise: the pressure swing adsorption gas separation device comprises an NGN oxygen-nitrogen separation unit and a plurality of sets of NT nitrogen buffer units, wherein the NGN oxygen-nitrogen separation unit comprises an absorber MS101A and an absorber MS101B, and the NT nitrogen buffer units comprise an adsorption tower and the adsorption tower is provided with an air inlet and a plurality of air outlets.
As a preferred embodiment of the present invention, the gas outlets are arranged at intervals along the gas flow direction.
As a preferred embodiment of the present invention, the adsorbers MS101A and MS101B are filled with adsorbent.
As a preferred implementation mode of the invention, a throttle valve LV and a programmable valve QV are arranged at the inlet end of the NT nitrogen buffer unit to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
As a preferred embodiment of the present invention, the separation method comprises the steps of:
step 1: total amount G Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n Sum of G 1 To prepare
Figure BDA0004059580860000021
Purity Q 1 Weight of adsorbent required for nitrogen yield, G n For preparing->
Figure BDA0004059580860000022
Purity Q n The weight of adsorbent required for nitrogen production;
step 2: the configuration number of the NT nitrogen buffer units is determined by the number of different nitrogen purity specifications prepared simultaneously, namely n sets of NT nitrogen buffer units (n=2, 3 … …) are needed for preparing n different nitrogen purities;
step 3: the inlet end of each set of NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
As a preferred embodiment of the present invention, the adsorber is packed with adsorbent G Total (S) ＝G 1 +G 2 。
As a preferred embodiment of the invention, the nitrogen making device is kept for a fixed adsorption period t Total (S) Unchanged, wherein t Total (S) ＝t 1 +t 2 。
In a preferred embodiment of the present invention
Figure BDA0004059580860000031
Opening QV in time period 1 Valve, product nitrogen enters nitrogen buffer tank GH 1 Obtaining average->
Figure BDA0004059580860000035
High purity product nitrogen with nitrogen yield of Q 1 。
In a preferred embodiment of the present invention
Figure BDA0004059580860000032
Opening QV in time period 2 Valve, product nitrogen enters nitrogen buffer tank GH 2 Obtaining average->
Figure BDA0004059580860000036
High purity product nitrogen with nitrogen yield of Q 2 。
Compared with the prior art, the invention has the following beneficial effects:
the invention provides another gas separation device for preparing two or more product gases with different purities. Specifically taking a pressure swing adsorption nitrogen production device as an example, the device mainly comprises an NGN oxygen-nitrogen separation unit and a plurality of NT nitrogen buffer units. Wherein the NGN oxygen-nitrogen separation unit has the same structure as the nitrogen making device for preparing single purity, and comprises an absorber MS101A and an absorberMS101B, wherein the adsorber is filled with adsorbent, the total amount G Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n Sum of G 1 To prepare
Figure BDA0004059580860000033
Purity Q 1 Weight of adsorbent required for nitrogen yield, G n For preparing->
Figure BDA0004059580860000034
Purity Q n The nitrogen yield required the weight of adsorbent. The number of NT nitrogen buffer units is determined by the number of different nitrogen purity specifications to be produced simultaneously, i.e., n NT nitrogen buffer units (n=2, 3 … …) are required to produce n different nitrogen purities. The inlet end of each set of NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: a pressure swing adsorption gas separation device and a preparation method thereof comprise: the pressure swing adsorption gas separation device comprises an NGN oxygen-nitrogen separation unit and a plurality of NT nitrogen buffer units, wherein the NGN oxygen-nitrogen separation unit comprises an absorber MS101A and an absorber MS101B, the NT nitrogen buffer unit comprises an adsorption tower, one air inlet and a plurality of air outlets are arranged on the adsorption tower, and the pressure swing adsorption gas separation device mainly comprises the NGN oxygen-nitrogen separation unit and a plurality of NT nitrogen buffer unitsThe punching unit is formed. Wherein the NGN oxygen-nitrogen separation unit is identical with the structure of the nitrogen production device for producing single purity, and comprises an absorber MS101A and an absorber MS101B, wherein the absorber is filled with an adsorbent, and the total amount G thereof Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n Sum of G 1 To prepare
Figure BDA0004059580860000043
Purity Q 1 Weight of adsorbent required for nitrogen yield, G n For preparing->
Figure BDA0004059580860000044
Purity Q n The nitrogen yield required the weight of adsorbent. The number of NT nitrogen buffer units is determined by the number of different nitrogen purity specifications to be produced simultaneously, i.e., n NT nitrogen buffer units (n=2, 3 … …) are required to produce n different nitrogen purities. The inlet end of each set of NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
Further improved, as shown in fig. 1: the gas outlets are arranged at intervals along the gas flow direction.
Further improved, as shown in fig. 1: the adsorbers MS101A and MS101B are filled with adsorbent.
Further improved, as shown in fig. 1: and the inlet end of the NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
Further improved, as shown in fig. 1: the separation method comprises the following steps:
step 1: total amount G Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n Sum of G 1 To prepare
Figure BDA0004059580860000041
Purity Q 1 Weight of adsorbent required for nitrogen yield, G n For preparing->
Figure BDA0004059580860000042
Purity Q n The weight of adsorbent required for nitrogen production;
step 2: the configuration number of the NT nitrogen buffer units is determined by the number of different nitrogen purity specifications prepared simultaneously, namely n sets of NT nitrogen buffer units (n=2, 3 … …) are needed for preparing n different nitrogen purities;
step 3: the inlet end of each set of NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
Further improved, as shown in fig. 1: the adsorber is filled with adsorbent G Total (S) ＝G 1 +G 2 。
Further improved, as shown in fig. 1: maintaining a fixed adsorption period t of the nitrogen making device Total (S) Unchanged, wherein t Total (S) ＝t 1 +t 2 。
Further improved, as shown in fig. 1: at the position of
Figure BDA0004059580860000051
Opening QV in time period 1 The valve is provided with a valve body,
product nitrogen enters a nitrogen buffer tank GH 1 Obtain an average
Figure BDA0004059580860000057
High purity product nitrogen with nitrogen yield of Q 1 。
Further improved, as shown in fig. 1: at the position of
Figure BDA0004059580860000053
Opening QV in time period 2 Valve, product nitrogen enters nitrogen buffer tank GH 2 Obtaining average->
Figure BDA0004059580860000056
High purity product nitrogen with nitrogen yield of Q 2 。
Working principle: the invention provides another gas separation device for preparing two or more product gases with different purities. Specifically taking a pressure swing adsorption nitrogen production device as an example, the device mainly comprises an NGN oxygen-nitrogen separation unit and a plurality of NT nitrogen buffer units. Wherein the NGN oxygen-nitrogen separation unit is identical with the structure of the nitrogen production device for producing single purity, and comprises an absorber MS101A and an absorber MS101B, wherein the absorber is filled with an adsorbent, and the total amount G thereof Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n Sum of G 1 To prepare
Figure BDA0004059580860000054
Purity Q 1 Weight of adsorbent required for nitrogen yield, G n For preparing->
Figure BDA0004059580860000055
Purity Q n The nitrogen yield required the weight of adsorbent. The number of NT nitrogen buffer units is determined by the number of different nitrogen purity specifications to be produced simultaneously, i.e., n NT nitrogen buffer units (n=2, 3 … …) are required to produce n different nitrogen purities. The inlet end of each set of NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A pressure swing adsorption gas separation device, characterized in that: comprising the following steps: the pressure swing adsorption gas separation device comprises an NGN oxygen-nitrogen separation unit and a plurality of sets of NT nitrogen buffer units, wherein the NGN oxygen-nitrogen separation unit comprises an absorber MS101A and an absorber MS101B, and the NT nitrogen buffer units comprise an adsorption tower and the adsorption tower is provided with an air inlet and a plurality of air outlets.
2. The pressure swing adsorption gas separation apparatus and method of manufacture of claim 1, wherein: the gas outlets are arranged at intervals along the gas flow direction.
3. The pressure swing adsorption gas separation apparatus and method of manufacture of claim 1, wherein: the adsorbers MS101A and MS101B are filled with adsorbent.
4. A pressure swing adsorption gas separation apparatus and method of manufacture according to claim 3, wherein: and the inlet end of the NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
5. A pressure swing adsorption gas separation process according to claim 1, wherein: the separation method comprises the following steps:
step 1: total amount G Total (S) Equal to the adsorbent G required for preparing nitrogen with different purity 1 、G 2 ……G n Sum of G 1 To prepare
Figure FDA0004059580850000011
Purity Q 1 Weight of adsorbent required for nitrogen yield, G n For preparing->
Figure FDA0004059580850000012
Purity Q n The weight of adsorbent required for nitrogen production;
step 2: the configuration number of the NT nitrogen buffer units is determined by the number of different nitrogen purity specifications prepared simultaneously, namely n sets of NT nitrogen buffer units (n=2, 3 … …) are needed for preparing n different nitrogen purities;
step 3: the inlet end of each set of NT nitrogen buffer unit is provided with a throttle valve LV and a program control valve QV to control the flow rate and the time period of the nitrogen produced by the NGN oxygen-nitrogen separation unit and flowing into the NT nitrogen buffer unit.
6. The pressure swing adsorption gas separation apparatus and method of manufacture according to claim 5, wherein: the adsorber is filled with adsorbent G Total (S) ＝G 1 +G 2 。
7. The pressure swing adsorption gas separation apparatus and method of manufacture according to claim 5, wherein: maintaining a fixed adsorption period t of the nitrogen making device Total (S) Unchanged, wherein t Total (S) ＝t 1 +t 2 。
8. The pressure swing adsorption gas separation apparatus and method of manufacture according to claim 5, wherein: at the position of
Figure FDA0004059580850000021
Opening QV in time period 1 Valve, product nitrogen enters nitrogen buffer tank GH 1 Obtaining average->
Figure FDA0004059580850000022
High purity product nitrogen with nitrogen yield of Q 1 。
9. The pressure swing adsorption gas separation apparatus and method of manufacture according to claim 5, wherein: at the position of
Figure FDA0004059580850000023
Opening QV in time period 2 Valve, product nitrogen enters nitrogen buffer tank GH 2 Obtaining average->
Figure FDA0004059580850000024
High purity product nitrogen with nitrogen yield of Q 2 。
CN202310053862.XA 2023-02-03 2023-02-03 Pressure swing adsorption gas separation device and preparation method Pending CN116272250A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116768166A (en) * 2023-08-18 2023-09-19 宁德时代新能源科技股份有限公司 Nitrogen production control method, device, equipment, storage medium and nitrogen production system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116768166A (en) * 2023-08-18 2023-09-19 宁德时代新能源科技股份有限公司 Nitrogen production control method, device, equipment, storage medium and nitrogen production system
CN116768166B (en) * 2023-08-18 2024-02-02 宁德时代新能源科技股份有限公司 Nitrogen production control method, device, equipment, storage medium and nitrogen production system

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