CN216320972U - Separation CH4/N2Double-tower pressure swing adsorption device for mixed gas - Google Patents
Separation CH4/N2Double-tower pressure swing adsorption device for mixed gas Download PDFInfo
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- CN216320972U CN216320972U CN202120755971.2U CN202120755971U CN216320972U CN 216320972 U CN216320972 U CN 216320972U CN 202120755971 U CN202120755971 U CN 202120755971U CN 216320972 U CN216320972 U CN 216320972U
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Abstract
The utility model relates to a method for separating CH4/N2The double-tower pressure swing adsorption device for mixed gas comprises a pressurizing bottle, a raw material gas bottle, a mass flow meter, a gas analyzer, a gas collecting bottle, a first adsorption tower, a second adsorption tower and a vacuum pump, wherein the upper end and the lower end of the first adsorption tower and the second adsorption tower are respectively provided with an upper gas port and a lower gas port, the upper gas port is connected with an upper gas pipe, and the lower gas port is connected with a lower gas pipe; the two upper air pipes are communicated with a first branch pipe and a second branch pipe through a tee joint, and the two lower air pipes are connected with a third branch pipe and a third branch pipe through a tee jointA fourth branch pipe; according to the utility model, switching among the double towers is realized through the pneumatic valve I, the pneumatic valve II and the pneumatic valve III, the gas concentration, the residence time change and the system pressure can be observed on line by connecting the PLC controller and the computer, the efficient operation of an adsorbent and the continuous operation of an adsorption device system can be realized, and the system is safe, efficient and very convenient to operate; when one adsorption tower works, the other adsorption tower can be regenerated by vacuumizing.
Description
Technical Field
The utility model belongs to the technical field of pressure swing adsorption, and particularly relates to a method for separating CH4/N2A double-tower pressure swing adsorption device for mixed gas.
Background
The pressure swing adsorption device is a novel gas adsorption separation technology, and is based on the difference of methane and nitrogen adsorption capacities or different adsorption rates of adsorbents in an adsorption tower, so that the methane and nitrogen can be separated from each other, and in the adsorption separation process, gas adsorption or desorption can be realized by increasing pressure and reducing pressure. The pressure swing adsorption device has the advantages of convenient operation, high automation degree, low operation cost, no need of an external heating source or a refrigeration source, capability of working at room temperature and lower pressure, and wide application in the fields of oxygen production, hydrogen production, tail gas recovery and the like. Is currently evaluating CH4/N2The pressure swing adsorption device mainly comprising a single adsorption tower is used in the aspect of separation effect, the adsorbent in the adsorption tower is saturated in adsorption, the raw material gas supply needs to be manually stopped, then the pressure of the device is reduced, the adsorbent is regenerated, the adsorption effect of the adsorbent is not easy to accurately evaluate within a certain adsorption time, and the pressure swing adsorption device has a great difference with the simulated industrial implementation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a separation CH capable of realizing automatic continuous operation4/N2A double-tower pressure swing adsorption device for mixed gas.
The technical scheme of the utility model is as follows:
separation CH4/N2The double-tower pressure swing adsorption device for mixed gas comprises a pressurizing bottle, a raw material gas bottle, a mass flow meter, a gas analyzer, a gas collecting tank, a first adsorption tower, a second adsorption tower and a vacuum pump, wherein the upper end and the lower end of the first adsorption tower and the second adsorption tower are respectively provided with an upper gas port and a lower gas port, the upper gas port is connected with an upper gas pipe, and the lower gas port is connected with a lower gas pipe; two go up the trachea and all have first branch pipe and second branch pipe through the tee bend intercommunication, two all be provided with manual valve one on the first branch pipe, two first branchThe tubes are all connected with a first main tube in a three-way manner, and the tail end of the first main tube is connected with a pressurizing bottle through a pressure reducing valve; the two second branch pipes are respectively provided with a first pneumatic valve, the two second branch pipes are connected with a second main pipe through a tee joint, and a mass flowmeter, a gas analyzer and a gas collecting tank are sequentially connected on the second main pipe in series along the gas flow direction;
the two lower air pipes are connected with a third branch pipe and a fourth branch pipe through a tee joint, the two third branch pipes are connected with a third main pipe through a tee joint, the tail end of the third main pipe is connected with a raw material gas cylinder through a pressure reducing valve, and a pneumatic valve II is further arranged on the third branch pipe; the two fourth branch pipes are connected with a fourth main pipe through a tee joint, the tail end of the fourth main pipe is connected to an air pumping port of a vacuum pump, and a pneumatic valve III is arranged on each of the two fourth branch pipes; and pressure sensors are also arranged on the two upper air pipes.
Furthermore, a pipe valve is arranged on the first main pipe.
Furthermore, a gas release valve positioned between the gas analyzer and the gas collecting bottle is also arranged on the second main pipe.
Further, argon or helium is filled in the pressurizing bottle.
Further, said separation of CH4/N2The double-tower pressure swing adsorption device for the mixed gas further comprises a PLC (programmable logic controller), a computer and an air compressor, wherein the first pneumatic valve, the second pneumatic valve and the third pneumatic valve are respectively connected with an air outlet of the air compressor through air pipes, and the air pipes are further provided with electric valves controlled by the PLC.
Further, all the pressure sensors, the mass flow meters and the gas analyzers are in communication connection with the PLC.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, switching among the double towers is realized through the pneumatic valve I, the pneumatic valve II and the pneumatic valve III, the gas concentration, the residence time change and the system pressure can be observed on line by connecting the PLC controller and the computer, the efficient operation of an adsorbent and the continuous operation of an adsorption device system can be realized, and the system is safe, efficient and very convenient to operate; when one of the adsorption towers is in operation,the other adsorption tower can realize regeneration by vacuumizing; except for CH4/N2Besides the adsorption of mixed gas, said invention also can be used for adsorbing CH4/CO2、N2/O2And evaluating the dynamic performance of the adsorption effect of the mixed gas.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of a heat-insulating water cylinder according to an embodiment of the present invention.
In the figure, a pressurizing bottle (1), a raw material gas bottle (2), a mass flow meter (3), a gas analyzer (4), a gas collecting tank (5), a first adsorption tower (6), a second adsorption tower (7), a vacuum pump (8), an upper gas pipe (9), a lower gas pipe (10), a first branch pipe (11), a second branch pipe (12), a first manual valve (13), a first pneumatic valve (14), a second main pipe (15), a third branch pipe (16), a fourth branch pipe (17), a third main pipe (18), a second pneumatic valve (19), a third pneumatic valve (20), a pressure sensor (21), a pressure reducing valve (22), a pipe valve (23), a deflation valve (24), a hanging plate (25), a heat-insulating water cylinder (26), a water outlet (27), a water inlet (28), a water channel (29), a lifting hole (30), a lifting hook (31) and a hanging rope (32).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIG. 1, a separation CH4/N2The double-tower pressure swing adsorption device of mixed gas comprises a pressurizing bottle 1, a raw material gas bottle 2, a mass flow meter 3, a gas analyzer 4, a gas collecting bottle 5, a first adsorption tower 6, a second adsorption tower 7 and a vacuum pump 8, wherein argon or helium is filled in the pressurizing bottle 1 to serve as pressure gas, an upper gas port and a lower gas port are respectively arranged at the upper end and the lower end of the first adsorption tower 6 and the second adsorption tower 7, the upper gas port is connected with an upper gas pipe 9, and the double-tower pressure swing adsorption device of mixed gas comprises a pressurizing bottle 1, a raw material gas bottle 2, a mass flow meter 3, a gas analyzer 4, a gas collecting bottle 5, a first adsorption tower 6, a second adsorption tower 7 and a vacuum pump 8The lower air port is connected with a lower air pipe 10; the two upper air pipes 9 are communicated with a first branch pipe 11 and a second branch pipe 12 through tee joints, a first manual valve 13 is arranged on each first branch pipe 11, each first branch pipe 11 is in tee joint with a first main pipe, the tail end of each first main pipe is connected with a pressure charging bottle 1 through a pressure reducing valve 22, and therefore one pressure charging bottle 1 supplies air to the two adsorption towers; the two second branch pipes 12 are respectively provided with a pneumatic valve I14, the two second branch pipes 12 are connected with a second main pipe 15 through a tee joint, the second main pipe 15 is sequentially connected with a mass flow meter 3, a gas analyzer 4 and a gas collecting tank 5 in series along the gas flow direction, namely, the gas flowing out of the two adsorption towers is analyzed through the mass flow meter 3 and the gas analyzer 4, and qualified gas is collected through the gas collecting tank 5;
the two lower air pipes 10 are both connected with a third branch pipe 16 and a fourth branch pipe 17 through a tee joint, the two third branch pipes 16 are connected with a third main pipe 18 through a tee joint, the tail end of the third main pipe 18 is connected with the raw material air bottle 2 through a pressure reducing valve 22, and a pneumatic valve II 19 is further arranged on the third branch pipe 16, so that the raw material air bottle 2 can supply air for two adsorption towers simultaneously; the two fourth branch pipes 17 are connected with a fourth main pipe through a tee joint, the tail end of the fourth main pipe is connected to an air pumping port of a vacuum pump 8, and a pneumatic valve III 20 is arranged on each of the two fourth branch pipes 17, so that the two adsorption towers can be pumped to be vacuum; pressure sensors 21 are also arranged on the two upper air pipes 9.
Further, as shown in fig. 1, a pipe valve 23 is further disposed on the first manifold, the pipe valve 23 is manually operated, and the pipe valve 23 is closed before and after each adsorption is completed to close the pipeline.
Further, as shown in fig. 1, a release valve 24 is further disposed on the second manifold 15 and located between the gas analyzer 4 and the gas collecting bottle 5, and the gas collecting bottle 5 can be mounted and dismounted by closing the release valve 24.
Further, as shown in FIG. 1, the separation CH4/N2The double-tower pressure swing adsorption device for the mixed gas further comprises a PLC (programmable logic controller), a computer and an air compressor, wherein the first pneumatic valve 14, the second pneumatic valve 19 and the third pneumatic valve 20 are respectively connected with an air outlet of the air compressor through air pipes, and the air pipes are further provided with a gas pipe controlled by the air compressorAll the pressure sensors 21, the mass flow meter 3 and the gas analyzer 4 are in communication connection with the PLC, the computer is used as an upper computer, and a user can operate the computer to realize the setting and control of the adsorption device and check the detection results of the pressure sensors 21, the mass flow meter 3 and the gas analyzer 4.
In one embodiment, as shown in fig. 2, an insulating water cylinder 26 is sleeved on the peripheries of the first adsorption tower 6 and the second adsorption tower 7, the insulating water cylinder 26 is made of plastic, the insulating water cylinder 26 has an interlayer for water to flow through, a spiral water channel 29 is arranged in the interlayer, the water channel 29 is formed by bonding two inner walls of the interlayer together along a spiral shape, a water outlet 27 is arranged at the upper end of the water channel 29, and a water inlet 28 is arranged at the lower end of the water channel; the water outlet 27 and the water inlet are connected with a water supply device through a water pipe, the water supply device can be a water bath kettle or a constant temperature water supply device, and pressure water supply is provided by a water pump; the utility model adopts water circulation to preserve heat, thereby realizing heat preservation and cold preservation, regulating and controlling the environmental temperature of the adsorption tower in a certain range and ensuring the adsorption effect of the adsorption tower.
Further, as shown in fig. 2, a hanging plate 25 is arranged on the upper air pipe 9, a plurality of lifting hooks 31 are hung on the hanging plate 25, a thickened part is arranged on the upper edge of the heat-insulating water cylinder 26, a plurality of lifting holes 30 are uniformly formed in the thickened part, and the heat-insulating water cylinder 26 is hung on the lifting hooks 31 through the lifting holes 30; the hanging plate 25 is preferably hoop-shaped and can be tightly held at the periphery of the upper air pipe 9, the hoop-shaped hanging plate 25 comprises two sub-parts which can be buckled, hanging ropes 32 are uniformly arranged on the sub-parts, and the lifting hooks 31 are connected to the lower ends of the hanging ropes 32; in addition, a bracket can be arranged on the lower air pipe 10 to support the bottom of the heat-preservation water cylinder 26 and reduce the stress of the hanging plate 25; if the heat-preservation water cylinder 26 is needed, the heat-preservation water cylinder 26 is firstly sleeved outside the adsorption tower, and then the upper air pipe 9 and the lower air pipe 10 are installed.
Besides the ordinary pressure swing adsorption separation operation, the utility model can also carry out the evaluation experiment of the adsorbent;
when an adsorbent evaluation experiment is carried out, firstly, whether the device leaks air or not is detected, all valves are closed, a pressure reducing valve 22 and a pipe valve 23 of a pressure charging bottle 1 and one or two first manual valves 13 are opened, pressurized air is introduced into the adsorption device, the pressure reducing valve 22 is adjusted to be pressurized to a certain pressure, the pipe valve 23 and the first manual valves 13 are closed, whether the pressure is reduced or not is checked, and if the pressure is reduced, the system needs to be overhauled;
after the system is checked to be normal, proper adsorbents are filled into the two adsorption towers, the tightness of the system is checked again, and the device is connected;
purging the adsorption device with pressurized gas, closing all valves, opening the pipe valve 23, the first manual valve 13, the first pneumatic valve 14, and the air release valve 24, and observing the change of the gas analyzer 4 to make the residual CH in the pipeline4、N2Discharging the waste water out of the system;
after purging is finished, all valves are closed, the third pneumatic valve 20 is opened, the system is vacuumized, the pressure in the system is reduced to be close to 0 in absolute pressure, a certain time is kept, the third pneumatic valve 20 is automatically closed, and the mass flow meter 3 is adjusted to be a design value;
filling the adsorption tower with pressure gas to the required pressure again, closing the pipe valve 23 and the pressure reducing valve 22 of the pressure filling bottle 1 and the first manual valve 13 after the pressure is stabilized, opening the pressure reducing valve 22 of the raw material gas bottle 2 (adjusting to the set pressure), and opening the second pneumatic valve 19 and the first pneumatic valve 14 in sequence, wherein the adsorbent in the system starts to work at the moment, and observing the curve change of the gas analyzer 4;
according to reality, switch between two adsorption towers, when first adsorption tower 6 during operation, evacuation desorption is being carried out to second adsorption tower 7, can be as required at any time data acquisition or close the system, change the adsorbent.
When gas adsorption and impurity removal are carried out, after gas tightness inspection and vacuumizing are finished, raw gas is filled into the adsorption tower, and gas content analysis is carried out by a gas analyzer 4.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications of the embodiments or portions thereof may be made, and any changes, substitutions, improvements and the like made within the scope and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. Separation CH4/N2The double-tower pressure swing adsorption device of the mixed gas is characterized in that: the device comprises a pressurizing bottle, a raw material gas bottle, a mass flow meter, a gas analyzer, a gas collecting bottle, a first adsorption tower, a second adsorption tower and a vacuum pump, wherein an upper gas port and a lower gas port are respectively arranged at the upper end and the lower end of the first adsorption tower and the second adsorption tower, the upper gas port is connected with an upper gas pipe, and the lower gas port is connected with a lower gas pipe; the two upper air pipes are communicated with a first branch pipe and a second branch pipe through a tee joint, a first manual valve is arranged on each first branch pipe, each first branch pipe is connected with a first main pipe through the tee joint, and the tail end of each first main pipe is connected with a pressurizing bottle through a pressure reducing valve; the two second branch pipes are respectively provided with a first pneumatic valve, the two second branch pipes are connected with a second main pipe through a tee joint, and a mass flow meter, a gas analyzer and a gas collecting bottle are sequentially connected onto the second main pipe in series along the gas flow direction;
the two lower air pipes are connected with a third branch pipe and a fourth branch pipe through a tee joint, the two third branch pipes are connected with a third main pipe through a tee joint, the tail end of the third main pipe is connected with a raw material gas cylinder through a pressure reducing valve, and a pneumatic valve II is further arranged on the third branch pipe; the two fourth branch pipes are connected with a fourth main pipe through a tee joint, the tail end of the fourth main pipe is connected to an air pumping port of a vacuum pump, and a pneumatic valve III is arranged on each of the two fourth branch pipes; and pressure sensors are also arranged on the two upper air pipes.
2. The isolated CH of claim 14/N2The double-tower pressure swing adsorption device of the mixed gas is characterized in that: and a pipe valve is also arranged on the first main pipe.
3. The isolated CH of claim 14/N2The double-tower pressure swing adsorption device of the mixed gas is characterized in that: on the second header pipeAnd a gas release valve positioned between the gas analyzer and the gas collecting bottle is also arranged.
4. The isolated CH of claim 14/N2The double-tower pressure swing adsorption device of the mixed gas is characterized in that: and argon or helium is filled in the pressurizing bottle.
5. The isolated CH of claim 14/N2The double-tower pressure swing adsorption device of the mixed gas is characterized in that: the air compressor is characterized by further comprising a PLC, a computer and an air compressor, wherein the first pneumatic valve, the second pneumatic valve and the third pneumatic valve are respectively connected with an air outlet of the air compressor through air pipes, and the air pipes are further provided with electric valves controlled by the PLC.
6. The isolated CH of claim 54/N2The double-tower pressure swing adsorption device of the mixed gas is characterized in that: and all the pressure sensors, the mass flow meter and the gas analyzer are in communication connection with the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120755971.2U CN216320972U (en) | 2021-04-13 | 2021-04-13 | Separation CH4/N2Double-tower pressure swing adsorption device for mixed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120755971.2U CN216320972U (en) | 2021-04-13 | 2021-04-13 | Separation CH4/N2Double-tower pressure swing adsorption device for mixed gas |
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| Publication Number | Publication Date |
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| CN216320972U true CN216320972U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120755971.2U Active CN216320972U (en) | 2021-04-13 | 2021-04-13 | Separation CH4/N2Double-tower pressure swing adsorption device for mixed gas |
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| CN (1) | CN216320972U (en) |
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- 2021-04-13 CN CN202120755971.2U patent/CN216320972U/en active Active
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