CN211864453U - Simple pressure swing adsorption nitrogen making machine - Google Patents
Simple pressure swing adsorption nitrogen making machine Download PDFInfo
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- CN211864453U CN211864453U CN201922392341.9U CN201922392341U CN211864453U CN 211864453 U CN211864453 U CN 211864453U CN 201922392341 U CN201922392341 U CN 201922392341U CN 211864453 U CN211864453 U CN 211864453U
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Abstract
The utility model provides a simple and easy type pressure swing adsorption nitrogen generator utilizes multiple-way valve or valve group to replace the numerous control flap of traditional type pressure swing adsorption nitrogen generator. If a group of two-position five-way electromagnetic valves or valve groups are used for replacing five control valves on the lower side of the traditional pressure swing adsorption nitrogen making machine; meanwhile, another two-position three-way electromagnetic valve or valve group is used for replacing five control valves on the lower side of the traditional pressure swing adsorption nitrogen making machine. The beneficial effects of this patent are for simplifying system and framework, promote packaging efficiency and promote production speed, reduce production time and reduction in production cost.
Description
Technical Field
The utility model relates to a gaseous manufacturing or purification equipment technical field especially relate to an utilize simple and easy type pressure swing adsorption nitrogen generator of pressure swing adsorption theory of operation production nitrogen gas.
Background
Nitrogen is produced by separating nitrogen from oxygen in air using a gas separation process, typically using a specially treated activated carbon, i.e., a carbon molecular sieve, to separate the air. The aperture of the carbon molecular sieve is in the diameter range of nitrogen and oxygen molecules, and the oxygen molecules are smaller than the nitrogen molecules in volume, so that the oxygen molecules are adsorbed on the surface of the carbon molecular sieve firstly. The nitrogen molecules are discharged from the molecular sieve bed layer and enter a rear-stage storage tank to achieve the purpose of nitrogen preparation, and the oxygen molecules are desorbed by equipment and discharged into the atmosphere to achieve the purpose of molecular sieve regeneration.
The conventional pressure swing adsorption nitrogen making system changes air sent from the outside into compressed air through a compressor, then the compressed air is treated through a cold dryer or an adsorption dryer and a filter or an activated carbon tank, most of oil, water and dust in the compressed air are removed, and then the compressed air enters a buffer air storage tank. Compressed air in the air storage tank is the air inlet of the commercial pressure swing adsorption nitrogen making machine, the compressed air flows through the adsorption tower body from bottom to top, the adsorption tower is filled with the carbon molecular sieve, and oxygen molecules and nitrogen molecules are adsorbed on the surface of the carbon molecular sieve when the air passes through the adsorption tower. Because of different molecular diameters, oxygen molecules are adsorbed on the surface of the carbon molecular sieve more than nitrogen molecules. Most of oxygen molecules are adsorbed according to the speed of air flowing through the adsorption tower, and nitrogen molecules flow out from the upper end of the adsorption tower and enter the nitrogen reflux tank. After a period of adsorption, the carbon molecular sieve is saturated with adsorbed oxygen molecules and needs to be regenerated, and the regeneration is realized by depressurization desorption. Since carbon molecular sieves are no longer capable of adsorbing gas molecules at low pressure, most molecules are evacuated at reduced pressure. The process is called desorption, the gas released during evacuation is discharged through a silencer to avoid disturbing noise, and meanwhile, the nitrogen refilling adsorption tower of the nitrogen backflow tank is started to improve the purity of the nitrogen during subsequent nitrogen manufacturing. In order to improve the purity of the produced gas, the pressure equalization operation is usually carried out by adopting high-purity nitrogen in a nitrogen reflux tank during desorption. In order to achieve continuous gas supply, a multi-tower operation is generally employed, for example, as shown in fig. 1, two adsorption towers are used, while an adsorption tower a is in an adsorption state, another adsorption tower B is in a desorption state, and the two towers are mutually switched to an adsorption and desorption state by time control and switching. The nitrogen produced by the pressure swing adsorption nitrogen generator flows into a nitrogen storage tank for use in a factory process.
The pressure swing adsorption nitrogen generators described above all have a significant disadvantage in that they must be operated using a number of control valves, for example five on the lower side and three on the upper side as shown in FIG. 1. The numerous valves result in complex systems, time consuming assembly, increased production time, and increased production costs, which are a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in order to overcome the defects in the prior art, the utility model provides a simple and easy type pressure swing adsorption nitrogen making machine.
The utility model provides a technical scheme that its technical problem will adopt is: a simple pressure-variable adsorption nitrogen making machine comprises
A set of intake air pretreatment devices;
at least two adsorption columns filled with an oxygen molecular adsorbent;
a set of nitrogen reflux tanks;
at least two multi-way solenoid valves or valve groups;
a set of operation control units;
the multi-way electromagnetic valve or the valve group is connected with the adsorption tower and carries out adsorption, pressure equalizing and desorption operations through the operation control unit. The intake air is compressed air or other gas containing nitrogen.
Further, the nitrogen making machine comprises two adsorption towers, namely an adsorption tower A and an adsorption tower B, wherein the two adsorption towers alternately make nitrogen, the nitrogen making machine also comprises a controller, a two-position five-way electromagnetic valve or valve group and a two-position three-way electromagnetic valve or valve group, the two-position five-way electromagnetic valve or valve group comprises an air main inlet, an A interface, a B interface, an A discharge port and a B discharge port, and the air main inlet is connected to an air source and used for the inlet of compressed air; the interface A is connected to the air inlet of the adsorption tower A, and the interface B is connected to the air inlet of the adsorption tower B.
The two-position three-way electromagnetic valve or the valve group comprises a C interface, a D interface and a total gas outlet, the nitrogen gas outlet of the adsorption tower A is connected to the C interface, the nitrogen gas outlet of the adsorption tower B is connected to the D interface, and the total gas outlet is connected to the nitrogen storage tank and used for outputting nitrogen.
When the adsorption tower A produces nitrogen, the interface A is an air outlet, the interface B is an air inlet, the interface C is an air inlet, the interface D is closed, the main air inlet is communicated with the interface A and disconnected with the interface B, the interface C is communicated with the main air outlet, and the interface B is communicated with the discharge outlet B; compressed air sequentially flows through an air main inlet, an A interface, an A, C interface and a main air outlet; and an air inlet of the adsorption tower B is used as an air return outlet, and compressed air in the adsorption tower B is discharged through a connector B and a discharge port B.
When the adsorption tower B produces nitrogen, the interface A is an air inlet, the interface B is an air outlet, the interface C is turned off, the interface D is an air inlet, the air main inlet is disconnected with the interface A and communicated with the interface B, the interface D is communicated with the main air outlet, and the interface A is communicated with the exhaust port A; compressed air sequentially flows through an air main inlet, a B connector, an B, D connector and a main air outlet; and an air inlet of the adsorption tower A is used as a return air outlet, and compressed air in the adsorption tower A is discharged through an A connector and an A discharge port.
The on-off switching of the interface of the electromagnetic valve or the valve group is controlled by the operation control unit, and the method for controlling the on-off of the electromagnetic valve or the valve group by the operation control unit can be realized by the prior art.
Further, silencers are connected to the A discharge port and the B discharge port. Reduce the noise when desorbing.
The utility model has the advantages that: the utility model provides a simple pressure swing adsorption nitrogen generator, which utilizes a multi-way valve or a valve group to replace a plurality of control valves, and can utilize the simplified multi-way valve or the valve group to replace a plurality of control valves so as to simplify the system and the framework; secondly, a plurality of control valves can be replaced by simplified multi-way valves or valve groups so as to improve the assembly efficiency and the production speed; thirdly, a plurality of control valves can be replaced by simplified multi-way valves or valve groups so as to reduce the production time and the production cost.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a conventional pressure swing adsorption nitrogen generator.
Fig. 2 is a schematic structural diagram of the pressure swing adsorption nitrogen generator of the present invention.
Fig. 3 is a gas flow chart of nitrogen production in the adsorption column a.
FIG. 4 is a gas flow chart of nitrogen production in adsorption column B.
In the figure: 1. the device comprises a two-position five-way electromagnetic valve, an air main inlet, a two-position five-way electromagnetic valve, an air main inlet 12, an air interface A, an air interface 13, an air interface; 2. a two-position three-way electromagnetic valve 21, a main air outlet 22, a C interface 23 and a D interface; A. and the adsorption tower B.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present patent clearer, the technical solutions in the embodiments of the present patent will be clearly and completely described below with reference to the drawings in the embodiments of the present patent, and it is obvious that the described embodiments are some embodiments of the present patent, but not all embodiments.
This patent is for utilizing multiple-way valve or valve group to replace numerous control valve, and this embodiment takes a set of adsorption tower as the example to control valve adopts the solenoid valve, explains. As shown in fig. 2, the utility model discloses a simple pressure swing adsorption nitrogen generator, which comprises two adsorption towers, namely an adsorption tower A and an adsorption tower B, wherein the two adsorption towers are filled with oxygenated molecular adsorbents, and are used for generating nitrogen alternately during operation, and the nitrogen generator utilizes a group of two-position five-way solenoid valves 1 to replace five control valves on the lower side of the traditional pressure swing adsorption nitrogen generator in fig. 1; meanwhile, another two-position three-way electromagnetic valve 2 or valve group is used for replacing three control valves on the upper side of the traditional pressure swing adsorption nitrogen making machine in the figure 1, and the operation control unit is used for carrying out adsorption, pressure equalizing and desorption operations.
When the pressure swing adsorption nitrogen making machine is actually operated, all operation logics are kept unchanged, and only the corresponding valves are changed into multi-way electromagnetic valves or valve groups. Meanwhile, the multi-way electromagnetic valve or the valve group is connected with the adsorption tower, and a metal pipe or a pressure-resistant plastic pipe or even a pressure-resistant rubber pipe can be used. When the hose is used, the assembly operation can be simpler and faster, and the production speed and the efficiency are more improved.
The technology of this patent can be applied to the pressure swing adsorption nitrogen generator of various different capacities, also can be applied to the little unit that laboratory performance analysis used. The technology of the scheme is also suitable for a modularized pressure swing adsorption nitrogen making machine, or a pressure swing adsorption nitrogen making machine with medium and uniform pressure is attached, and meanwhile, two valves with medium and uniform pressure can be replaced by a multi-way electromagnetic valve or a valve group. In addition, the technology can also be applied to pressure swing adsorption gas generators of other gas types, such as oxygen generators, hydrogen purifiers and the like.
The specific interface connection relationship is as follows:
the two-position five-way electromagnetic valve 1 comprises an air main inlet 11, an A interface 12, a B interface 13, an A discharge port 14 and a B discharge port 15, wherein the air main inlet 11 is connected to an air source and used for the inlet of compressed air; the A interface 12 is connected to the air inlet of the adsorption tower A, and the B interface 13 is connected to the air inlet of the adsorption tower B.
The two-position three-way electromagnetic valve 2 comprises a C interface 22, a D interface 23 and a total air outlet 21, the nitrogen air outlet of the adsorption tower A is connected to the C interface 22, the nitrogen air outlet of the adsorption tower B is connected to the D interface 23, and the total air outlet 21 is connected to a nitrogen storage tank and used for outputting nitrogen.
When the adsorption tower A produces nitrogen, the interface A12 is an air outlet, the interface B13 is an air inlet, the interface C22 is an air inlet, the interface D23 is closed, the air main inlet 11 is communicated with the interface A12 and disconnected with the interface B13, the interface C22 is communicated with the main air outlet 21, and the interface B13 is communicated with the discharge port B15; compressed air sequentially flows through an air main inlet 11, an A interface 12, an adsorption tower A, C interface 22 and a main air outlet 21; an air inlet of the adsorption tower B is used as a return air outlet, and compressed air in the adsorption tower B is discharged through a B connector 13 and a B discharge port 15.
When the adsorption tower B produces nitrogen, the interface A12 is an air inlet, the interface B13 is an air outlet, the interface C22 is closed, the interface D23 is an air inlet, the air main inlet 11 is disconnected with the interface A12 and communicated with the interface B13, the interface D23 is communicated with the main air outlet 21, and the interface A12 is communicated with the exhaust port A14; compressed air sequentially flows through an air main inlet 11, a B interface 13, an adsorption tower B, D interface 23 and a main air outlet 21; the air inlet of the adsorption tower A is used as a return air outlet, and the compressed air in the adsorption tower A is discharged through an A interface 12 and an A discharge port 14.
The control flow is explained below:
as shown in fig. 3, when the adsorption tower a performs adsorption nitrogen production and the adsorption tower B performs desorption, after the device is started, the operation control unit controls the air main inlet 11 and the a port 12 of the two-position five-way electromagnetic valve 1 to be communicated, the C port 22 of the two-position three-way electromagnetic valve 2 to be communicated with the main air outlet 21, and the D port 23 to be turned off; meanwhile, the B interface 13 of the two-position five-way electromagnetic valve 1 is communicated with the B discharge port 15, and the A discharge port 14 is closed.
Dry compressed air flows into the adsorption tower A through an air main inlet 11 and an A interface 12 of the two-position five-way electromagnetic valve 1 to be adsorbed for nitrogen production, nitrogen flows out from a nitrogen outlet of the adsorption tower A, and flows out through a C interface 22 and a main air outlet 21 of the two-position three-way electromagnetic valve 2; meanwhile, the regeneration gas of the adsorption tower B is discharged through a B interface 13 and a B discharge port 15 of the two-position five-way electromagnetic valve 1.
The adsorption tower A is switched to the adsorption tower B through time cycle, at the moment, the adsorption tower A desorbs, and the adsorption tower B adsorbs and produces nitrogen. As shown in fig. 4, the operation control unit controls the air main inlet 11 of the two-position five-way electromagnetic valve 1 to be communicated with the B interface 13, the D interface 23 of the two-position three-way electromagnetic valve 2 is communicated with the main air outlet 21, and the C interface 22 is turned off; meanwhile, the A port 12 of the two-position five-way electromagnetic valve 1 is communicated with the A discharge port 14, and the B discharge port 15 is closed.
Dry compressed air flows into the adsorption tower B through an air main inlet 11 and a B interface 13 of the two-position five-way electromagnetic valve 1 to be adsorbed for nitrogen production, nitrogen flows out from a nitrogen outlet of the adsorption tower B and flows out through a D interface 23 and a main air outlet 21 of the two-position three-way electromagnetic valve 2; meanwhile, the regeneration gas of the adsorption tower A is discharged through an A port 12 and an A discharge port 14 of the two-position five-way electromagnetic valve 1; two adsorption towers circularly adsorb and continuously generate nitrogen.
In fig. 3 and 4, the dotted line inside the solenoid valve represents the connection relationship of the interfaces, the symbol "X" on the pipeline represents the disconnection, and no air flow exists in the pipeline.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present patent, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present patent.
Claims (3)
1. The utility model provides a simple and easy type vary voltage adsorbs nitrogen generator which characterized in that: comprises that
A set of intake air pretreatment devices;
at least two adsorption columns filled with an oxygen molecular adsorbent;
a set of nitrogen reflux tanks;
at least two multi-way solenoid valves or valve groups;
a set of operation control units;
the multi-way electromagnetic valve or the valve group is connected with the adsorption tower and carries out adsorption, pressure equalizing and desorption operations through the operation control unit.
2. The simplified pressure swing adsorption nitrogen generator as set forth in claim 1, wherein: the nitrogen making machine comprises two adsorption towers A and B, the multi-way electromagnetic valve or valve group comprises a two-position five-way electromagnetic valve or valve group and a two-position three-way electromagnetic valve or valve group, wherein,
the two-position five-way electromagnetic valve or the valve group comprises an air main inlet, an interface A, an interface B, an exhaust port A and an exhaust port B, wherein the air main inlet is connected to an air source and used for the entrance of compressed air; the interface A is connected to an air inlet of the adsorption tower A, and the interface B is connected to an air inlet of the adsorption tower B;
the two-position three-way electromagnetic valve or valve group comprises a port C, a port D and a total gas outlet, the nitrogen gas outlet of the adsorption tower A is connected to the port C, the nitrogen gas outlet of the adsorption tower B is connected to the port D, and the total gas outlet is connected to the nitrogen storage tank and used for outputting nitrogen;
when the adsorption tower A produces nitrogen, the interface A is an air outlet, the interface B is an air inlet, the interface C is an air inlet, the interface D is closed, the main air inlet is communicated with the interface A, the interface C is communicated with the main air outlet, and the interface B is communicated with the discharge outlet B; compressed air sequentially flows through an air main inlet, an A interface, an A, C interface and a main air outlet; an air inlet of the adsorption tower B is used as a return air outlet, and compressed air in the adsorption tower B is discharged through a connector B and a discharge port B;
when the adsorption tower B produces nitrogen, the interface A is an air inlet, the interface B is an air outlet, the interface C is turned off, the interface D is an air inlet, the main air inlet is communicated with the interface B, the interface D is communicated with the main air outlet, and the interface A is communicated with the discharge port A; compressed air sequentially flows through an air main inlet, a B connector, an B, D connector and a main air outlet; and an air inlet of the adsorption tower A is used as a return air outlet, and compressed air in the adsorption tower A is discharged through an A connector and an A discharge port.
3. The simplified pressure swing adsorption nitrogen generator as set forth in claim 2, wherein: and silencers are connected to the A discharge port and the B discharge port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922392341.9U CN211864453U (en) | 2019-12-27 | 2019-12-27 | Simple pressure swing adsorption nitrogen making machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922392341.9U CN211864453U (en) | 2019-12-27 | 2019-12-27 | Simple pressure swing adsorption nitrogen making machine |
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| CN211864453U true CN211864453U (en) | 2020-11-06 |
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