CN219111254U - Large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with - Google Patents
Large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with Download PDFInfo
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- CN219111254U CN219111254U CN202221244944.XU CN202221244944U CN219111254U CN 219111254 U CN219111254 U CN 219111254U CN 202221244944 U CN202221244944 U CN 202221244944U CN 219111254 U CN219111254 U CN 219111254U
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Abstract
The utility model relates to the technical field of oxygen production and nitrogen production, in particular to a large-scale VPSA nitrogen-oxygen co-production device with multiple towers. Including the air compressor unit, adsorption equipment, gas storage device, pipeline device and controlling means, the air compressor unit, adsorption equipment, gas storage device passes through pipeline device and connects, the air compressor unit includes the air compressor machine, desicator and desicator heating device connect, the air compressor machine adopts centrifugal air compressor unit, adsorption equipment includes a plurality of nitrogen gas adsorption tower and a plurality of oxygen adsorption tower, gas storage device includes the nitrogen gas jar, retrieve gas jar and finished product oxygen jar, nitrogen gas adsorption tower and nitrogen gas jar pass through pipeline device and connect, retrieve gas jar and nitrogen gas adsorption tower pass through pipeline device and connect, oxygen adsorption tower and retrieve gas jar pass through pipeline device and connect, finished product oxygen jar and oxygen adsorption tower pass through pipeline device and connect. The utility model has the advantages of high resource utilization rate, low energy consumption and capability of simultaneously producing nitrogen and oxygen.
Description
Technical Field
The utility model relates to the technical field of oxygen production and nitrogen production, in particular to a large-scale VPSA nitrogen-oxygen co-production device with multiple towers.
Background
Currently, the main processes for producing oxygen-enriched air by pressure swing adsorption air separation include PSA and VPSA processes. The PSA process mainly adopts pressurized adsorption and normal pressure desorption, and the basic flow is as follows: pressure adsorption, pressure equalizing and reducing, forward discharge, reverse discharge, flushing, pressure equalizing and pressure increasing and product gas pressure increasing. The VPSA process mainly adopts normal pressure adsorption and vacuum desorption, and the basic flow is as follows: pressure-equalizing and reducing adsorption under normal pressure, vacuumizing, equalizing and increasing pressure, and increasing pressure of product gas. The PSA process has the advantages of high adsorption pressure (0.2-0.6 MPa), small investment and simple equipment, but high energy consumption, and is only suitable for the field of small-scale oxygen production. The VPSA process equipment is relatively complex, but has high oxygen yield and low energy consumption, and is suitable for the field of large-scale oxygen molding.
At present, a large amount of oxygen-enriched waste gas can be generated in the nitrogen production process, the oxygen content can reach more than 78%, the direct discharge can cause the risk of open fire, at present, the oxygen-enriched waste gas is directly communicated into a combustion device for oxygen supply, the oxygen utilization rate of the method is low, great waste is caused, and at the same time, the oxygen production technology at present directly adopts air to produce oxygen, the defects of high energy consumption and low productivity exist, so that a large VPSA nitrogen-oxygen co-production device with high resource utilization rate and low energy consumption is needed at present, and nitrogen and oxygen can be produced simultaneously.
Disclosure of Invention
In order to solve the problems, the large VPSA nitrogen-oxygen co-production device is high in resource utilization rate and low in energy consumption, and can simultaneously produce nitrogen and oxygen. The utility model adopts the following technical scheme.
The utility model provides a large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with, includes air compressor unit, adsorption equipment, gas storage device, pipeline device and controlling means, air compressor unit, adsorption equipment, gas storage device pass through pipeline device and connect, air compressor unit include the air compressor machine, desicator and desicator heating device connect, the air compressor machine adopt centrifugal air compressor unit, adsorption equipment include a plurality of nitrogen adsorption tower and a plurality of oxygen adsorption tower, gas storage device include the nitrogen jar, retrieve gas jar and finished product oxygen, the nitrogen adsorption tower with the nitrogen jar pass through pipeline device and connect, retrieve gas jar with the nitrogen adsorption tower pass through pipeline device and connect, the oxygen adsorption tower with the recovery gas jar pass through pipeline device and connect, finished product oxygen jar with the oxygen adsorption tower pass through pipeline device and connect.
According to the utility model, during the use process, air is pumped in through the air compressor unit, then compressed air is dried through the dryer and then is pumped into the nitrogen adsorption towers, the three nitrogen adsorption towers and the three oxygen adsorption towers are adopted, the three adsorption towers can be arranged so as to be convenient for switching operation of the adsorption towers in the nitrogen backflushing and overhauling process, the multi-tower joint operation is also convenient when a large amount of production is needed, waste gas in the adsorption towers can be pumped into the air compressor after the nitrogen adsorption is discharged, at the moment, the air compressor does not absorb air from the outside, but absorbs oxygen-enriched waste gas, the oxygen-enriched waste gas is pumped into the recovery air tank, and the air can be stably pumped into the oxygen adsorption towers through the recovery air tank.
Preferably, the pipeline device comprises a nitrogen gas inlet pipe, a nitrogen gas outlet pipe, a recovery air pipe, a recovery gas inlet pipe and an oxygen outlet pipe, wherein two ends of the nitrogen gas inlet pipe are respectively connected with the air compressor unit and the nitrogen gas adsorption tower, two ends of the nitrogen gas outlet pipe are respectively connected with the nitrogen gas tank and the nitrogen gas adsorption tower, the recovery air pipe comprises a first recovery air pipe and a second recovery air pipe, two ends of the first recovery air pipe are respectively connected with the air compressor unit and the nitrogen gas adsorption tower, the second recovery air pipe is connected with the nitrogen gas inlet pipe and the recovery gas tank, two ends of the recovery gas inlet pipe are respectively connected with the recovery gas tank and the oxygen gas adsorption tower, and two ends of the oxygen outlet pipe are respectively connected with the finished oxygen gas tank and the oxygen gas adsorption tower.
By adopting the structure, the first recovery air pipe can directly recover the oxygen-enriched waste gas exhausted by the nitrogen adsorption tower, and the second recovery air pipe can pump the waste gas generated in the regeneration process of the adsorption tower into the recovery air tank in the regeneration process of the adsorption tower, so that the loss is reduced.
Preferably, the control device comprises a control console and a plurality of control valves, the control valves are respectively arranged on the nitrogen inlet pipe, the nitrogen outlet pipe, the recycling gas inlet pipe and the oxygen outlet pipe, the control console is electrically connected with the control valves, and the control console is electrically connected with the air compressor unit.
The utility model adopts the structure to automatically control, thereby greatly reducing the labor cost.
Preferably, the nitrogen tank comprises a first nitrogen tank and a second nitrogen tank, the nitrogen outlet pipe comprises an outlet pipe, a first main pipe, a second main pipe and a third main pipe, the first main pipe is connected with the first nitrogen tank and the second nitrogen tank, the outlet pipe is respectively connected with the first main pipe, the second main pipe is connected with the third main pipe, the second main pipe is connected with the outlet pipe and the first nitrogen tank, and the third main pipe is connected with the outlet pipe and the second nitrogen tank.
According to the utility model, by adopting the structure, the produced nitrogen can be introduced into the first nitrogen tank through the second main pipe to be temporarily stored, when high-concentration nitrogen is needed, the gas in the first nitrogen tank is introduced into the nitrogen adsorption tower through the return pipe again to be re-adsorbed, the produced high-concentration nitrogen can enter the second nitrogen tank through the third main pipe, meanwhile, the first main pipe can be directly communicated with the first nitrogen tank and the second nitrogen tank, and when the storage amount is large, the redundant nitrogen is stored in the first nitrogen tank.
Preferably, the air compressor unit is provided with an air compressor air inlet pipe and an air compressor air outlet pipe, wherein the air compressor air outlet pipe is connected with the nitrogen air inlet pipe, the air compressor air inlet pipe is connected with the first recovery air pipe, and one end of the air compressor air inlet pipe is connected with the filter.
The utility model adopts the structure, is convenient for pumping the waste gas into the recovery gas tank, and is beneficial to reducing the cost.
Preferably, the first nitrogen tank is connected with the nitrogen inlet pipe through a return pipe.
Preferably, a third recovery air pipe is arranged on the first nitrogen air pipe, and the third recovery air pipe is connected with the first recovery air pipe.
Preferably, the nitrogen inlet pipe is provided with an emptying pipe.
The third recovery air pipe can pump waste gas generated in the regeneration process of the adsorption tower into the recovery air tank, the process is specifically as follows, in the regeneration process, gas of the first nitrogen air tank reversely enters the adsorption tower through the nitrogen air outlet pipe, the molecular sieve is flushed, oxygen-enriched gas adsorbed by the molecular sieve is discharged from the nitrogen air inlet pipe together with the oxygen-enriched gas existing in the tank body, the oxygen content in the first discharged part is high, the waste gas can be recovered through the third recovery air pipe, at the moment, a valve on the third recovery air pipe is opened, the valve of the nitrogen air inlet pipe is in a closed state, when the nitrogen content is high and the oxygen content is reduced along with the gas inlet, the real-time detection can be carried out through a detection device arranged on the third recovery air pipe, and when the oxygen content is lower than 40%, the valve on the third recovery air pipe can be closed, and at the same time, the exhaust gas is discharged by opening the valve of the evacuation pipe.
The utility model has the beneficial effects that: 1. the device has the advantages of large capacity, high yield, low energy consumption, low noise and capability of producing high-purity nitrogen and oxygen; 2. compared with the prior art, the device adopts a plurality of collecting tanks to collect the oxygen-enriched waste gas generated in the nitrogen production process, and adds a plurality of adsorption tower structures to adsorb the oxygen-enriched waste gas to produce oxygen, so that the co-production of nitrogen and oxygen is realized, on one hand, the energy is saved, and on the other hand, the waste gas emission is reduced. 3. The device adopts a centrifugal air compressor unit, and is beneficial to reducing noise pollution. 4. The device adopts the technical scheme of multi-tower combination, can adopt the adsorption towers of different quantity to different demands, helps to reduce energy consumption, can guarantee simultaneously that the production is not required to stop in the process of overhauling, has improved production efficiency. 5. The device adopts the oil pressure control valve, can realize the opening and closing of the gas valve for rapidly controlling the large flow rate in the process of multi-tower combination, and ensures the stable operation of the device.
Drawings
FIG. 1 is a schematic diagram of a structure of the present utility model;
FIG. 2 is a schematic diagram of the structure of the nitrogen outlet pipe.
Detailed Description
The utility model is further explained below in connection with specific embodiments.
Example 1
A multi-tower combined large VPSA nitrogen-oxygen co-production device comprises an air compressor unit 1, an adsorption device 2, a gas storage device 3, a pipeline device 4 and a control device 5, wherein the air compressor unit 1, the adsorption device 2 and the gas storage device 3 are connected through the pipeline device 4, the air compressor unit 11 comprises an air compressor 11, a dryer 12 and a dryer heating device 14, the dryer is connected with the dryer heating device, the dryer is heated through the structure, the working efficiency of the dryer is improved, the adsorption device 2 comprises 3 nitrogen adsorption towers 21 and 3 oxygen adsorption towers 22, the gas storage device 3 comprises a nitrogen gas tank 31, a recovery gas tank 32 and a finished oxygen gas tank 33, the pipeline device 4 comprises a nitrogen gas inlet pipe 41, a nitrogen gas outlet pipe 42, a recovery gas pipe 43, a recovery gas inlet pipe 44 and an oxygen gas outlet pipe 45, the nitrogen adsorption towers 21 and the nitrogen gas tank 31 are connected through the nitrogen gas outlet pipe 42, the recovery gas tank 32 and the nitrogen gas adsorption tower 21 are connected through the recovery gas pipe 43, the oxygen adsorption tower 22 and the oxygen gas tank 32 are connected through the recovery gas outlet pipe 44 and the oxygen gas outlet pipe 45. The two ends of the nitrogen gas inlet pipe 41 are respectively connected with the air compressor unit 1 and the nitrogen gas adsorption tower 21, the two ends of the nitrogen gas outlet pipe 42 are respectively connected with the nitrogen gas tank 31 and the nitrogen gas adsorption tower 21, the recycling air pipe 43 comprises a first recycling air pipe 431, a second recycling air pipe 432 and a third recycling air pipe 433, the two ends of the first recycling air pipe 431 are respectively connected with the air compressor unit 1 and the nitrogen gas adsorption tower 21, the second recycling air pipe 432 is connected with the nitrogen gas inlet pipe 41 and the recycling gas tank 32, the two ends of the recycling gas inlet pipe 44 are respectively connected with the recycling gas tank 32 and the oxygen gas adsorption tower 22, and the two ends of the oxygen gas outlet pipe 45 are respectively connected with the finished oxygen gas tank 33 and the oxygen gas adsorption tower 22. The control device 5 comprises a control console 51 and a plurality of control valves 52, the control valves 52 are respectively arranged on the nitrogen gas inlet pipe 41, the nitrogen gas outlet pipe 42, the recovery gas pipe 43, the recovery gas inlet pipe 44 and the oxygen gas outlet pipe 45, the control console 51 is electrically connected with the control valves 52, and the control console 51 is electrically connected with the air compressor unit 1. The air compressor 11 adopts a centrifugal air compressor unit. The nitrogen tank 31 include first nitrogen tank 311 and second nitrogen tank 312, nitrogen outlet duct 42 include outlet duct 421, first house steward 422, second house steward 423 and third house steward 424, first house steward 422 connect first nitrogen tank 311 and second nitrogen tank 312, outlet duct 421 respectively with first house steward 422, second house steward 423 and third house steward 424 are connected, second house steward 423 connect outlet duct and first nitrogen tank 311, third house steward 424 connect outlet duct and second nitrogen tank 312. The air compressor unit 1 is provided with an air compressor inlet pipe 111 and an air compressor outlet pipe 112, wherein the air compressor outlet pipe 112 is connected with the nitrogen inlet pipe 41, the air compressor inlet pipe 111 is connected with the first recovery air pipe 431, and one end of the air compressor inlet pipe 111 is connected with the filter 13. The first nitrogen tank 311 and the nitrogen intake pipe 41 are connected by a return pipe 46. The first nitrogen tank is provided with a third recovery air pipe 433, and the third recovery air pipe is connected with the first recovery air pipe. An evacuation pipe 47 is provided on the nitrogen inlet pipe 41.
In the use process, air is pumped in through the air compressor unit 1, then compressed air is dried through the dryer 12 and then is pumped into the nitrogen adsorption tower 21, the technical scheme of three nitrogen adsorption towers 21 and three oxygen adsorption towers 22 is adopted, the three adsorption towers are arranged, so that nitrogen backflushing and switching operation of the adsorption towers in the overhaul process can be conveniently carried out, multi-tower joint operation can be conveniently carried out when mass production is needed, waste gas in the adsorption towers can be pumped into the air compressor 11 after nitrogen adsorption is discharged, at the moment, the air compressor 11 does not absorb air from the outside, but absorbs oxygen-enriched waste gas, and pumps the oxygen-enriched waste gas into the recovery gas tank 32, in the process, the first recovery gas pipe 431 can directly recover the oxygen-enriched waste gas discharged by the nitrogen adsorption tower 21, and the second recovery gas pipe 432 can pump the waste gas generated in the regeneration process into the recovery gas tank 32 in the regeneration process of the adsorption towers, so that loss is reduced. The third recovery air pipe 433 can pump the waste air generated in the regeneration process of the adsorption tower into the recovery air tank 32 in the regeneration process of the adsorption tower, the process is specifically as follows, the gas of the first nitrogen air tank 311 reversely enters the adsorption tower through the nitrogen air outlet pipe 42 in the regeneration process, the molecular sieve is flushed, the oxygen-enriched gas adsorbed by the molecular sieve is discharged from the nitrogen air inlet pipe 41 together with the oxygen-enriched gas existing in the tank body, the oxygen content in the first discharged part is high and can be recovered through the third recovery air pipe 433, at the moment, the valve on the third recovery air pipe 433 is opened, the valve of the nitrogen air inlet pipe 41 is in a closed state, when the nitrogen content is high along with the gas inlet, the oxygen content is reduced, the valve on the third recovery air pipe 433 can be closed through the detection device arranged on the third recovery air pipe 433, and the valve of the exhaust pipe is opened at the same time when the oxygen content is lower than 40%, and the waste gas is discharged. The air can be stably supplied to the oxygen adsorption tower 22 through the recovery air tank 32, when the oxygen production requirement is high, the original oxygen production equipment air compressor unit 1 can be switched to pump air to produce oxygen, the scheme can directly combine the original oxygen production equipment and the original nitrogen production equipment, the improvement cost is reduced, the process is realized through switching the control valve 52, air is pumped into other nitrogen adsorption towers 21 in advance to be adsorbed in the process, the nitrogen adsorption process is not influenced by the switching of the air compressor 11, the switching valve is continuously switched again to pump air after the oxygen-enriched waste gas is introduced, the other group of air compressors 11 are not required to be arranged by adopting the structure, the cost is greatly reduced, meanwhile, the energy consumption is also reduced, nitrogen is generated in the nitrogen adsorption towers 21 to be stored in the nitrogen tank 31, oxygen generated by the oxygen adsorption towers 22 is stored in the finished oxygen tank 33, the storage and the use of the finished gas are facilitated, and the production pressure is also reduced. Meanwhile, the nitrogen produced by the utility model can be introduced into the first nitrogen tank 311 through the second main pipe 423 to be temporarily stored, when high-concentration nitrogen is needed, the gas in the first nitrogen tank 311 is introduced into the nitrogen adsorption tower 21 through the return pipe 46 again to be re-adsorbed, the produced high-concentration nitrogen can enter the second nitrogen tank 312 through the third main pipe 424, meanwhile, the first main pipe 422 can be directly communicated with the first nitrogen tank 311 and the second nitrogen tank 312, and when the storage amount is large, the redundant nitrogen is stored in the first nitrogen tank 311.
Claims (8)
1. A large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with uses, its characterized in that: the device comprises an air compressor unit, an adsorption device, a gas storage device, a pipeline device and a control device, wherein the air compressor unit, the adsorption device and the gas storage device are connected through the pipeline device, the air compressor unit comprises an air compressor, a dryer and a dryer heating device, the dryer and the dryer heating device are connected, the air compressor adopts a centrifugal air compressor unit, the adsorption device comprises a plurality of nitrogen adsorption towers and a plurality of oxygen adsorption towers, the gas storage device comprises a nitrogen tank, a recovery tank and a finished oxygen tank, the nitrogen adsorption towers are connected through the pipeline device, the recovery tank is connected with the nitrogen adsorption towers through the pipeline device, the oxygen adsorption towers are connected with the recovery tank through the pipeline device, and the finished oxygen tank is connected with the oxygen adsorption towers through the pipeline device.
2. The large-scale VPSA nitrogen-oxygen cogeneration device for multi-tower combination according to claim 1, wherein the pipeline device comprises a nitrogen inlet pipe, a nitrogen outlet pipe, a recovery air inlet pipe and an oxygen outlet pipe, wherein two ends of the nitrogen inlet pipe are respectively connected with the air compressor unit and the nitrogen adsorption tower, two ends of the nitrogen outlet pipe are respectively connected with the nitrogen tank and the nitrogen adsorption tower, the recovery air pipe comprises a first recovery air pipe and a second recovery air pipe, two ends of the first recovery air pipe are respectively connected with the air compressor unit and the nitrogen adsorption tower, the second recovery air pipe is connected with the nitrogen inlet pipe and the recovery air tank, two ends of the recovery air inlet pipe are respectively connected with the recovery air tank and the oxygen adsorption tower, and two ends of the oxygen outlet pipe are respectively connected with the finished oxygen tank and the oxygen adsorption tower.
3. The large-scale VPSA nitrogen-oxygen cogeneration device for multi-tower combination according to claim 2, wherein the control device comprises a control console and a plurality of control valves, wherein the control valves are respectively arranged on the nitrogen inlet pipe, the nitrogen outlet pipe, the recycling air inlet pipe and the oxygen outlet pipe, the control console is electrically connected with the control valves, and the control console is electrically connected with the air compressor unit.
4. The large-scale VPSA nitrogen-oxygen cogeneration device for multi-tower combination according to claim 3, wherein the nitrogen tank comprises a first nitrogen tank and a second nitrogen tank, the nitrogen outlet pipe comprises an outlet pipe, a first main pipe, a second main pipe and a third main pipe, the first main pipe is connected with the first nitrogen tank and the second nitrogen tank, the outlet pipe is respectively connected with the first main pipe, the second main pipe is connected with the third main pipe, the second main pipe is connected with the outlet pipe and the first nitrogen tank, and the third main pipe is connected with the outlet pipe and the second nitrogen tank.
5. The multi-tower combined large-scale VPSA nitrogen-oxygen co-production device according to claim 4, wherein an air compressor air inlet pipe and an air compressor air outlet pipe are arranged on the air compressor unit, wherein the air compressor air outlet pipe is connected with the nitrogen air inlet pipe, the air compressor air inlet pipe is connected with the first recovery air pipe, and one end of the air compressor air inlet pipe is connected with the filter.
6. The multi-tower combined large-scale VPSA nitrogen-oxygen co-production device according to claim 5, wherein the first nitrogen tank is connected with the nitrogen inlet pipe through a return pipe.
7. The multi-tower combined large-scale VPSA nitrogen-oxygen co-production device according to claim 6, wherein a third recovery air pipe is arranged on the first nitrogen tank, and the third recovery air pipe is connected with the first recovery air pipe.
8. The multi-tower combined large-scale VPSA nitrogen-oxygen co-production device according to claim 7, wherein the nitrogen inlet pipe is provided with an emptying pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221244944.XU CN219111254U (en) | 2022-05-23 | 2022-05-23 | Large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221244944.XU CN219111254U (en) | 2022-05-23 | 2022-05-23 | Large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with |
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| CN219111254U true CN219111254U (en) | 2023-06-02 |
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| CN202221244944.XU Active CN219111254U (en) | 2022-05-23 | 2022-05-23 | Large-scale VPSA nitrogen oxygen coproduction device of multitower allies oneself with |
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