CN113477025B - Bidirectional rotation gas purifying device and method - Google Patents
Bidirectional rotation gas purifying device and method Download PDFInfo
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- CN113477025B CN113477025B CN202110785173.9A CN202110785173A CN113477025B CN 113477025 B CN113477025 B CN 113477025B CN 202110785173 A CN202110785173 A CN 202110785173A CN 113477025 B CN113477025 B CN 113477025B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000002457 bidirectional effect Effects 0.000 title abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 187
- 239000003463 adsorbent Substances 0.000 claims abstract description 69
- 238000001179 sorption measurement Methods 0.000 claims abstract description 39
- 238000000746 purification Methods 0.000 claims abstract description 30
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003546 flue gas Substances 0.000 claims abstract description 5
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000002808 molecular sieve Substances 0.000 claims description 2
- 239000002296 pyrolytic carbon Substances 0.000 claims description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
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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
- B01D53/0407—Constructional details of adsorbing systems
-
- 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
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0446—Means for feeding or distributing gases
-
- 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
- B01D53/0454—Controlling adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40084—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by exchanging used adsorbents with fresh adsorbents
Abstract
The invention provides a bidirectional rotation gas purifying device and a bidirectional rotation gas purifying method. When the device is operated, a left lower cut-off valve and a right upper cut-off valve on the gas pipeline are opened, the left upper cut-off valve and the right lower cut-off valve are closed, gas to be purified enters from the left end of the descending bed, is purified by the adsorbent in the descending bed, and is discharged from the right end of the descending bed; when the pressure difference between the left end and the right end of the descending bed reaches 5kPa, a lower right cut-off valve and an upper left cut-off valve are opened, the lower left cut-off valve and the upper right cut-off valve are closed, gas flows through the descending bed from right to left and is purified by the adsorbent in the bed, and the adsorbent saturated by adsorption is discharged under the control of a star valve below the descending bed. The device has the advantages of exquisite and compact structural design, simple operation and maintenance, capability of realizing continuous purification of gases such as methane, flue gas tail gas and the like, and wide application range.
Description
Technical Field
The invention belongs to the technical field of gas adsorption purification, and particularly relates to a bidirectional rotation gas purification device and method.
Background
With the development of economy and society, the importance of environmental protection on sustainable development is generally recognized all over the world, various environmental protection policies are formulated in a dispute, and particularly, the aspects of controlling and discharging atmospheric pollutants are brought about, so that the rapid development of gas purification technology is brought about. Among them, adsorption purification of gas by using a porous material is an important means, for example, purification of impurity gas (H 2 O、H 2 S, etc.); and purifying dioxin and the like in tail gas of the garbage incinerator by using activated carbon. One of the key factors of the gas purification technology is the development of a high-efficiency gas purification device, however, the gas purification device commonly used at present is mainly a fixed bed type gas purifier, and has the defects of incapability of continuous operation, narrow adaptability, troublesome adsorbent replacement, low utilization rate, low automation degree and the like.
For this reason, chinese patent CN202740909U proposes an air purifier with a backup purifying device, that is, by providing the backup purifying device, the problem that the device cannot operate when the purifier is replaced is solved. However, this method has not fundamentally solved the problem that the apparatus cannot be operated continuously, and requires a professional to replace the purifier periodically. Chinese patent CN212348245U proposes on this basis a gas purification device with both a backup purification device and a regenerable purification device, i.e. when switching purification devices, another purification device can be regenerated, thus avoiding replacement of the purification device. However, this method has a disadvantage in that the regeneration effect of the adsorbent material is limited, the adsorbent material cannot be replaced, and the adaptability of the apparatus is narrow. In addition, the purifiers of the two devices are all of traditional fixed bed type, and the defects that the utilization efficiency of the adsorbent at the inlet section is high, the utilization efficiency of the adsorbent at the outlet section is low and the utilization of the adsorbent is insufficient are overcome when the gas enters from one end and is discharged from the other end. Therefore, there is a need to develop a novel gas cleaning device.
Disclosure of Invention
The invention overcomes the defects of narrow adaptability, low automation degree and insufficient utilization of the adsorbent of the gas purifying device in the prior art, and provides the bidirectional rotation gas purifying device and the bidirectional rotation gas purifying method.
In order to solve the technical problems, the invention provides a bidirectional rotation gas purification device, which comprises a gas inlet, a gas outlet, a gas pipeline, a lower left shut-off valve, an upper left shut-off valve, a lower right shut-off valve, an upper right shut-off valve, a down bed and a star valve, wherein:
the gas pipeline is annular and comprises an upper region, a lower region, a left region and a right region, the lower region of the gas pipeline is provided with the gas inlet, the upper region of the gas pipeline is provided with the gas outlet, the left side and the right side of the left region of the gas pipeline are respectively provided with a left mounting port and a left gas inlet and outlet, the left side and the right side of the right region of the gas pipeline are respectively provided with a right gas inlet and outlet and a right mounting port, the upper part and the lower part of the left mounting port and the left gas inlet are respectively provided with an upper left shut-off valve and a lower left shut-off valve, and the upper part and the lower part of the right mounting port and the right gas inlet are respectively provided with an upper right shut-off valve and a lower right shut-off valve;
the downstream bed is arranged in an annular central hollow area surrounded by the gas pipeline and comprises a preassembling area, an adsorption area and an area to be discharged, wherein the preassembling area is positioned at the upper part of the downstream bed, fresh adsorbent conveyed from outside firstly enters the preassembling area, the adsorption area is positioned in the middle of the downstream bed immediately after the preassembling area, the downstream bed comprises a left bin, a right bin, a left gas inlet and outlet, a right gas inlet and outlet and a filter screen, the left bin and the right bin are arranged in the middle of the adsorption area in parallel, triangular guide plates are arranged at the upper end and the lower end of the left bin and the right bin, the filter screen is respectively arranged at the left end and the right end of the left bin, the left gas inlet and outlet is arranged at the left side of the left bin, and the right gas inlet and outlet are arranged at the right side of the right bin; the left gas inlet and outlet are connected with the left gas inlet and outlet of the gas pipeline, the right gas inlet and outlet are connected with the right gas inlet and outlet of the gas pipeline, the zone to be discharged is located at the lower part of the descending bed immediately following the adsorption zone, a discharge outlet is arranged at the bottom of the zone to be discharged, the discharge outlet is connected with the star valve, and the discharge of the adsorbent is controlled by the star valve.
Preferably, the left mounting port and the right mounting port are both provided with a gas detection device, including a gas detector and a pressure sensor.
Preferably, the left gas inlet and the right gas inlet are provided with trapezoid shrinkage ports.
Preferably, the filter screen is a metal filter screen or a nylon filter screen, and the mesh of the filter screen is smaller than the minimum particle size of the adsorbent.
Preferably, the shut-off valve is a solenoid valve or an electric valve.
According to another aspect of the invention, a method for purifying methane, tail gas of an industrial combustion furnace and the like by using the device is provided, which comprises the following steps:
step one: and selecting the adsorbent according to the property of the gas to be purified, closing a star valve, and feeding the adsorbent into the descending bed until the descending bed is full.
Step two: and opening a left lower cut-off valve and a right upper cut-off valve, closing the left upper cut-off valve and the right lower cut-off valve, introducing gas to be purified from the gas inlet, enabling the gas to enter the descending bed through the left gas inlet and outlet in the left area of the gas pipeline, adsorbing and purifying the gas by using an adsorbent in the descending bed, and discharging the purified gas from the right gas inlet and outlet of the descending bed.
Step three: and monitoring the pressure difference of gas inlets and outlets at the left side and the right side of the downer, when the pressure difference reaches 5kPa, opening a star valve, and controlling the adsorbent saturated in the adsorption zone to be discharged by the star valve below the downer, so that the adsorbent in the adsorption zone falls into the zone to be discharged, the adsorbent in the preassembled zone falls into the adsorption zone, and simultaneously replenishing fresh adsorbent into the preassembled zone of the downer, then closing a left lower cut-off valve and a right upper cut-off valve, and opening the left upper cut-off valve and the right lower cut-off valve, thereby enabling the gas to be purified to flow through the downer from right to left and be purified by the adsorbent in the downer until the pressure difference of the downer reaches 5kPa again.
Step four: repeating the second step and the third step until all the gases are purified.
Preferably, the gas to be purified comprises methane, coal-fired flue gas and industrial combustion furnace tail gas.
Preferably, the adsorbent is at least one of zeolite molecular sieve, metal oxide, activated carbon fiber or pyrolytic carbon.
Preferably, the adsorbent is granular and has a particle size of 1-10mm.
The technical scheme is used for gas adsorption and purification, and the beneficial effects are as follows:
1. the device is compact and reasonable in design, the adsorbent is thoroughly utilized, and the gas adsorption effect is good: if the gas to be purified is purged from only one direction, the defect that the utilization efficiency of the adsorbent on one side is high and the utilization efficiency of the adsorbent on the other side is low easily occurs, and the complete utilization of all the adsorbents can be completely realized by switching the flow direction of the gas to be purified left and right. Specifically, the design objective is mainly achieved by the following method: firstly, the device adopts the transverse flow of the gas to be purified and the longitudinal flow of the adsorbent, so that the contact between the gas and the adsorbent is more uniform, the length of an adsorption area is reduced, and the defect that the utilization efficiency of the adsorbent at the inlet section is high and the utilization efficiency of the adsorbent at the outlet section is low when the adsorbent and the gas to be purified flow in the same direction is overcome; secondly, designing a preassembly area, an adsorption area and a to-be-discharged area on the downstream bed, when the to-be-purified gas flows through the downstream bed from one side, mainly completing gas purification in the adsorption area, when the device monitors that the adsorbent is adsorbed and saturated, the adsorbent in the adsorption area is not directly discharged, the to-be-discharged area is firstly carried out, then the flowing direction of the to-be-purified gas is switched, the device can enable the gas to flow through the adsorption area and also bypass the to-be-discharged area, so that the adsorbent which is possibly underutilized at the other side of the original adsorption area in the to-be-discharged area is reused, and the problems that the gas flows at one side and the adsorbent at the gas outlet side is underutilized are solved; thirdly, the adsorption area can reduce the flow resistance of a single bin and improve the adsorption effect by designing two bins; the filter screens are additionally arranged on the left side and the right side of the bin to prevent the adsorbent from being blown out and taken away by the gas to be purified, and meanwhile, the filter screens can also be used for enabling the adsorbent to be blown by the transverse gas to be attached to the filter screens, so that the descending speed of the adsorbent is delayed, and the utilization efficiency of the adsorbent is improved; fourthly, the triangular guide plates are designed on the upper side and the lower side of the bin, so that the adsorbent can be guided to fall into and be discharged from the left bin and the right bin, and the gas to be purified can be guided to bypass the preassembling area and the region to be discharged from the upper side and the lower side of the left bin and the right bin, so that the flowing dead area is reduced, and the utilization efficiency of the adsorbent is improved.
2. The device has wide adaptability: the device has no special requirements on gas to be purified and the adsorbent, can select the adsorbent according to the property of the gas to be purified, can realize the adsorption purification of the gas such as methane, coal-fired flue gas, industrial combustion furnace tail gas and the like, and has wide device adaptability.
3. The device can continuously run for a long time, and has simple operation and high degree of automation: the device monitors the pressure difference of the left side and the right side of the descending bed in real time, and controls the opening and closing of the cut-off valve through electromagnetic control, so as to control the flowing direction of the gas to be purified, and simultaneously, the inlet and the outlet of the adsorbent can be realized through electric control, so that the device is simple to operate, high in automation degree and capable of continuously running for a long time.
Drawings
FIG. 1 is a schematic diagram of a bidirectional alternate gas purification device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the downer of the bi-directional rotating gas purification apparatus shown in FIG. 1;
[ description of the Main element symbols ]
1-a gas inlet; 2-gas outlet; 3-gas piping; 31-left mounting port; 32-left gas inlet and outlet; 33-right mounting port; 34-right gas inlet and outlet; 4-lower left shut-off valve; 5-upper left shut-off valve; 6-lower right shut-off valve; 7-upper right shut-off valve; 8-descending bed; 81-left bin; 82-right bin; 83-left gas inlet and outlet; 84-right gas inlet and outlet; 85-filtering net; 9-star valve.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
Aiming at the existing problems, the invention provides a bidirectional alternate gas purifying device and a bidirectional alternate gas purifying method, which are exquisite in design, simple in operation and maintenance and high in automation degree, and can realize efficient adsorption and purification of various gases such as methane, coal-fired flue gas, industrial combustion furnace tail gas and the like.
In order to achieve the above technical solution, as shown in fig. 1, an embodiment of the present invention provides a bidirectional rotation gas purifying device, which includes a gas inlet 1, a gas outlet 2, a gas pipe 3, a left mounting port 31, a left gas inlet 32, a right mounting port 33, a right gas inlet 34, a left lower shut-off valve 4, a left upper shut-off valve 5, a right lower shut-off valve 6, a right upper shut-off valve 7, and a down-bed 8; wherein:
the gas pipeline 3 is annular, and is divided into an upper region, a lower region, a left region and a right region, wherein the lower region of the gas pipeline 3 is provided with the gas inlet 1, the upper region of the gas pipeline is provided with the gas outlet 2, the left side and the right side of the left region middle pipeline of the gas pipeline 3 are respectively provided with the left mounting port 31 and the left gas inlet 32, the left side and the right side of the right region middle pipeline of the gas pipeline 3 are respectively provided with the right gas inlet 34 and the right mounting port 33, the upper side and the lower side pipelines of the left mounting port 31 and the left gas inlet 32 are provided with the upper left cut-off valve 5 and the lower left cut-off valve 4, the upper side and the lower side pipelines of the right mounting port 33 and the right gas inlet 34 are provided with the upper right cut-off valve 7 and the lower right cut-off valve 6, as an alternative way, the left mounting port 31 and the right mounting port 33 are provided with a gas detector and a pressure sensor, the annular center hollow region surrounded by the gas pipeline 3 is provided with the descending bed 8, and the left side and the right side of the descending bed 8 are respectively connected with the left gas inlet 3 and the right gas inlet 32.
The cross section of the downstream bed of the bidirectional rotation gas purification device further shown in fig. 2 comprises a preassembling area, an adsorption area and a region to be exhausted, wherein the preassembling area is positioned at the upper part of the downstream bed 8, fresh adsorbent conveyed from outside firstly enters the preassembling area, the adsorption area is positioned in the middle of the downstream bed 8 immediately after the preassembling area, the adsorption area comprises a left bin 81, a right bin 82, a left gas inlet and outlet 83, a right gas inlet and outlet 84 and a filter screen 85, the left bin 81 and the right bin 82 are arranged in the middle of the adsorption area, the left and right sides of the left bin 81 and the right bin 82 are respectively provided with the left gas inlet and outlet 83 and the right gas inlet and outlet 84, the left and right sides of the left bin 81 and the right bin 82 are respectively provided with trapezoid contraction openings, the filter screen 85 is arranged at the left and right sides of the left bin 81 and the right bin 82, as an optional mode, the filter screen 85 is a metal filter screen or nylon which mainly acts to prevent the adsorbent from being taken out of the downstream bed to be purified, the filter screen is arranged immediately after the filter screen is exhausted, the filter screen is arranged at the bottom of the downstream bed to be exhausted, the adsorption area is provided with a control outlet 9, and the exhaust outlet is arranged at the bottom of the adsorption area.
The specific application method of the bidirectional rotation gas purification device comprises the following steps:
step one: depending on the nature of the gas to be purified, the adsorbent is selected, the star valve 9 is closed and the adsorbent is fed into the downer 8 until it is full.
Step two: the left lower cut-off valve 4 and the right upper cut-off valve 7 are opened, the left upper cut-off valve 5 and the right lower cut-off valve 6 are closed, gas to be purified is introduced from the gas inlet 1, the gas enters the descending bed 8 through the left gas inlet and outlet 32 of the gas pipeline 3, the adsorbent in the descending bed 8 adsorbs and purifies the gas, and the purified gas is discharged from the right gas inlet and outlet 84 of the descending bed 8.
Step three: monitoring the pressure difference of gas inlets and outlets at the left side and the right side of the descending bed 8, when the pressure difference reaches 5kPa, opening a star valve 9, and controlling the adsorbent saturated in the adsorption zone to be discharged by the star valve 9 below the descending bed 8, so that the adsorbent in the adsorption zone falls into the adsorption zone, the adsorbent in the preassembly zone falls into the adsorption zone, and simultaneously replenishing fresh adsorbent into the preassembly zone, closing a left lower cut-off valve 4 and a right upper cut-off valve 7, and opening a left upper cut-off valve 5 and a right lower cut-off valve 6, thereby enabling the gas to be purified to flow through the descending bed 8 from right to left and be purified by the adsorbent in the bed until the pressure difference of the left and the right of the descending bed is monitored to reach 5kPa again.
Step four: repeating the second step and the third step until all the gases are purified.
Common sense of the above embodiments of the present invention, such as specific structures and features that are well known in the art, are not described in detail; the embodiments are described in a progressive manner, technical features related to the embodiments can be combined on the premise that the technical features do not form conflict with each other, and the same similar parts of the embodiments are mutually seen.
In the description of the present invention, the azimuth or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", etc., are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the present invention; the term "coupled" is to be interpreted broadly, and may be used, for example, as a fixed connection, as a removable connection, or as an integral connection, unless clearly indicated and limited otherwise; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations should and are intended to be comprehended within the scope of the invention.
Claims (8)
1. The utility model provides a two-way alternate gas purification device, its characterized in that includes gas inlet (1), gas outlet (2), gas pipeline (3), lower left trip valve (4), upper left trip valve (5), lower right trip valve (6), upper right trip valve (7), down bed (8) and star valve (9), wherein:
the gas pipeline (3) is annular and comprises an upper region, a lower region, a left region and a right region, the lower region of the gas pipeline (3) is provided with the gas inlet (1), the upper region of the gas pipeline (3) is provided with the gas outlet (2), the left side and the right side of the left region of the gas pipeline (3) are respectively provided with a left mounting opening (31) and a left gas inlet and outlet (32), the left side and the right side of the right region of the gas pipeline (3) are respectively provided with a right mounting opening (33) and a right gas inlet and outlet (34), the upper and lower parts of the left mounting opening (31) and the left gas inlet and outlet (32) are respectively provided with an upper left shut-off valve (5) and a lower left shut-off valve (4), and the upper and lower parts of the right mounting opening (33) and the right gas inlet and outlet (34) are respectively provided with an upper right shut-off valve (7) and a lower right shut-off valve (6);
the descending bed (8) is arranged in an annular hollow area surrounded by the gas pipeline (3), and comprises a preassembling area, an adsorption area and an area to be discharged, wherein the preassembling area is positioned at the upper part of the descending bed (8), an adsorbent conveyed from the outside enters the preassembling area firstly, the adsorption area is positioned in the middle of the descending bed (8) next to the preassembling area, the adsorbent comprises a left bin (81), a right bin (82), a left gas inlet and outlet (83), a right gas inlet and outlet (84) and a filter screen (85), and the left bin (81) and the right bin (82) are arranged in the middle of the adsorption area in parallel; triangular guide plates are arranged at the upper end and the lower end of the left bin (81) and the right bin (82), so that the adsorbents are guided to fall into and be discharged out of the left bin (81) and the right bin (82), and the gas to be purified can be guided to bypass from the upper side and the lower side of the left bin (81) and the right bin (82) to pass through the preassembling area and the region to be discharged; the left end and the right end of the left bin (81) and the right bin (82) are respectively provided with the filter screen (85), the left side of the left bin (81) is provided with the left gas inlet and outlet (83), and the right side of the right bin (82) is provided with the right gas inlet and outlet (84); the left gas inlet and outlet (83) is connected with the left gas inlet and outlet (32) of the gas pipeline (3), the right gas inlet and outlet (84) is connected with the right gas inlet and outlet (34) of the gas pipeline (3), the region to be discharged is next to the adsorption region and is positioned at the lower part of the descending bed (8), the bottom of the region to be discharged is provided with a discharge port, the discharge port is connected with the star valve (9), and the discharge of the adsorbent is controlled by the star valve (9); the left gas inlet and outlet (83) and the right gas inlet and outlet (84) are provided with trapezoid shrinkage openings.
2. The purification apparatus according to claim 1, wherein the left mounting port (31) and the right mounting port (33) are each provided with a gas detection device comprising a gas detector and a pressure sensor.
3. The purification device according to claim 1, characterized in that the filter screen (85) is a metal filter screen or a nylon filter screen, the perforations of which are smaller than 1mm.
4. The purification apparatus of claim 1, wherein the shut-off valve is a solenoid valve or an electrically operated valve.
5. The method of using a purification apparatus according to any one of claims 1-4, comprising the steps of:
step one: selecting an adsorbent according to the property of the gas to be purified, closing a star valve (9), and feeding the adsorbent into the descending bed (8) until the descending bed (8) is full;
step two: opening a left lower cut-off valve (4) and a right upper cut-off valve (7), closing the left upper cut-off valve (5) and the right lower cut-off valve (6), introducing gas to be purified from the gas inlet (1), enabling the gas to enter the descending bed (8) through the left gas inlet and outlet (32) of the left area of the gas pipeline (3), adsorbing and purifying the gas by an adsorbent in the descending bed (8), and discharging the purified gas from the right gas inlet and outlet (84) of the descending bed (8);
step three: monitoring the pressure difference of gas inlets and outlets at the left side and the right side of the descending bed (8), when the pressure difference reaches 5kPa, opening a star valve (9), controlling the adsorbent saturated in adsorption of a region to be discharged by the star valve (9) below the descending bed (8) to be discharged, so that the adsorbent of an adsorption region falls into the region to be discharged, the adsorbent of a preassembly region falls into the adsorption region, and simultaneously replenishing fresh adsorbent into the preassembly region of the descending bed (8), then closing a left lower cut-off valve (4) and a right upper cut-off valve (7), and opening the left upper cut-off valve (5) and the right lower cut-off valve (6), so that the gas to be purified flows through the descending bed (8) from right to left and is purified by the adsorbent in the bed until the pressure difference of the left side and the right side of the descending bed (8) is monitored to reach 5kPa again;
step four: repeating the second step and the third step until all the gases are purified.
6. The method for using the purifying device according to claim 5, wherein the gas to be purified comprises biogas, coal-fired flue gas or industrial furnace tail gas.
7. The method of claim 5, wherein the adsorbent is at least one of zeolite molecular sieve, metal oxide, activated carbon fiber, or pyrolytic carbon.
8. The method of using a purification apparatus according to claim 7, wherein the adsorbent is in the form of particles having a particle size of 1 to 10mm.
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