CN113477025A - Bidirectional alternate gas purification device and method - Google Patents
Bidirectional alternate gas purification device and method Download PDFInfo
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- CN113477025A CN113477025A CN202110785173.9A CN202110785173A CN113477025A CN 113477025 A CN113477025 A CN 113477025A CN 202110785173 A CN202110785173 A CN 202110785173A CN 113477025 A CN113477025 A CN 113477025A
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- 238000000746 purification Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000002457 bidirectional effect Effects 0.000 title abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 190
- 239000003463 adsorbent Substances 0.000 claims abstract description 68
- 238000001179 sorption measurement Methods 0.000 claims abstract description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 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
- 238000009434 installation Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000004677 Nylon Substances 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
- 230000008676 import Effects 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
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- 230000000694 effects Effects 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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- 238000011069 regeneration method Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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
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- 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
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- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention provides a bidirectional alternate gas purification device and a method. When the device operates, a left lower cut-off valve and a right upper cut-off valve on a 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 at the left end and the right end of the descending bed reaches 5kPa, the lower right cut-off valve and the 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 in adsorption is discharged by the star-shaped valve below the descending bed. The device structural design is exquisite compact, and operation maintenance is simple, can realize the continuous purification of gas such as marsh gas, flue gas tail gas, and application scope is wide.
Description
Technical Field
The invention belongs to the technical field of gas adsorption and purification, and particularly relates to a bidirectional alternate gas purification device and method.
Background
With the development of economic society, countries in the world generally recognize the importance of environmental protection on sustainable development, and various environmental protection policies, especially the control and emission of atmospheric pollutants, are made, thus bringing about the rapid development of gas purification technology. Among them, the adsorption purification of gas by using porous material is an important means, for example, the purification of impurity gas (H) in biogas by using metal oxide2O、H2S, etc.); the active carbon is used for purifying dioxin and the like in the tail gas of the waste incinerator. One of the key factors of the gas purification technology is the development of a high-efficiency gas purification device, however, the currently widely used gas purification device is mainly a fixed bed type gas purifier, and has the disadvantages 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 spare purifying device, i.e. by providing a spare purifying device, to solve the problem that the device cannot operate when the purifier is replaced. However, this approach does not fundamentally solve the problem that the apparatus cannot be operated continuously and requires a professional to replace the purifier at regular intervals. On this basis, chinese patent CN212348245U proposes a gas purification apparatus with both a standby purification device and a renewable purification device, that is, when switching the purification devices, another purification device can be regenerated, thereby avoiding the need to replace the purification devices. However, this method has the disadvantages that the regeneration effect of the adsorbent is limited, the adsorbent cannot be replaced, and the adaptability of the apparatus is narrow. In addition, the purifiers of the two devices are both in a traditional fixed bed type, and the defects that the utilization efficiency of the adsorbent at an inlet section is high, the utilization efficiency of the adsorbent at an outlet section is low, and the utilization of the adsorbent is insufficient due to the fact that the gas enters from one end and is discharged from the other end cannot be solved. Therefore, it is highly desirable to develop a new gas purification device.
Disclosure of Invention
The invention overcomes the defects of narrow adaptability, low automation degree and insufficient utilization of an adsorbent of a gas purification device in the prior art, and provides the bidirectional alternate gas purification device and the method.
In order to solve the technical problem, the invention provides a bidirectional alternate gas purification device, which comprises a gas inlet, a gas outlet, a gas pipeline, a left lower cut-off valve, a left upper cut-off valve, a right lower cut-off valve, a right upper cut-off valve, a down-going bed and a star-shaped valve, wherein:
the gas pipeline is annular and comprises an upper area, a lower area, a left area and a right area, the lower area of the gas pipeline is provided with the gas inlet, the upper area of the gas pipeline is provided with the gas outlet, the left side and the right side of the left area of the gas pipeline are respectively provided with a left mounting opening and a left gas inlet and outlet, the left side and the right side of the right area of the gas pipeline are respectively provided with a right gas inlet and outlet and a right mounting opening, the upper and lower parts of the left mounting opening and the left gas inlet and outlet are respectively provided with an upper left cutting valve and a lower left cutting valve, and the upper and lower parts of the right mounting opening and the right gas inlet and outlet are respectively provided with an upper right cutting valve and a lower right cutting valve;
the descending bed is arranged in an annular central empty area defined by the gas pipeline and comprises a preassembly area, an adsorption area and an area to be discharged, the preassembly area is positioned at the upper part of the descending bed, fresh adsorbent conveyed from the outside firstly enters the preassembly area, the adsorption area is next to the preassembly area and positioned in the middle of the descending bed and comprises a left chamber, a right chamber, a left gas inlet and outlet, a right gas inlet and outlet and a filter screen, the left chamber and the right chamber 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 chamber and the right chamber, the left end and the right end of the left chamber are respectively provided with the filter screen, the left side of the left chamber is provided with the left gas inlet and outlet, and the right side of the right chamber is provided with the right gas inlet and outlet; the left gas inlet and outlet is connected with the left gas inlet and outlet of the gas pipeline, the right gas inlet and outlet is connected with the right gas inlet and outlet of the gas pipeline, the exhaust area is closely attached to the adsorption area and located at the lower part of the descending bed, a discharge port is formed in the bottom of the exhaust area, the discharge port is connected with the star valve, and the star valve controls the discharge of the adsorbent.
Preferably, the left mounting port and the right mounting port are both provided with gas detection equipment comprising a gas detector and a pressure sensor.
Preferably, the left gas inlet and outlet and the right gas inlet and outlet are provided with trapezoidal contraction openings.
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 an electromagnetic valve or an electric valve.
According to another aspect of the present invention, there is provided a method for purifying biogas, industrial combustion furnace tail gas and other gases by using the above apparatus, comprising the following steps:
the method comprises the following steps: and selecting the adsorbent according to the properties of the gas to be purified, closing the star valve, and feeding the adsorbent into the downer until the downer is filled.
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, allowing the gas to enter the downer through the left gas inlet and outlet in the left area of the gas pipeline, adsorbing and purifying the gas by an adsorbent in the downer, and discharging the purified gas from the right gas inlet and outlet of the downer.
Step three: and monitoring the pressure difference of the left and right gas inlets and outlets of the downer, when the pressure difference reaches 5kPa, opening a star-shaped valve, discharging the adsorbent saturated in the adsorption area to be discharged from the star-shaped valve below the downer, so that the adsorbent in the adsorption area falls into the area to be discharged, the adsorbent in a pre-loading area falls into the adsorption area, simultaneously supplementing fresh adsorbent to the downer pre-loading area, then closing a lower left cut-off valve and an upper right cut-off valve, and opening the upper left cut-off valve and the lower right cut-off valve, so that the gas to be purified flows through the downer from right to left and is purified by the adsorbent in the downer until the pressure difference between the left and the right of the downer is monitored to reach 5kPa again.
Step four: and repeating the second step and the third step until all the gas is purified.
Preferably, the gas to be purified comprises biogas, 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 1-10 mm.
The technical scheme is used for gas adsorption and purification, and has the following beneficial effects:
1. the device design is compact reasonable, and the adsorbent utilizes thoroughly, and gas adsorption effect is good: if the gas to be purified is only blown from one direction, the defects 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 occur, and the flowing directions of the gas to be purified are switched left and right, so that the complete utilization of all the adsorbents can be completely realized. 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 gas is more uniformly contacted with the adsorbent, the length of an adsorption area is reduced, and the defects that the utilization efficiency of the adsorbent at an inlet section is high and the utilization efficiency of the adsorbent at an outlet section is low when the adsorbent and the gas to be purified flow in the same direction are overcome; secondly, designing a preassembly area, an adsorption area and a to-be-exhausted area on the descending bed, finishing gas purification mainly in the adsorption area when the gas to be purified flows through the descending bed from one side, when monitoring that the adsorbent is adsorbed and saturated by the device, not directly exhausting the adsorbent in the adsorption area, but firstly performing the to-be-exhausted area and then switching the flow direction of the gas to be purified, wherein the device can make the gas flow through the adsorption area and also flow around the to-be-exhausted area, so that the adsorbent which is possibly not fully utilized on the other side of the original adsorption area in the to-be-exhausted area is utilized again, and the problems that the adsorbent flows on one side of the gas and is not fully utilized on the gas outlet side 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, so that the adsorbent is prevented from being blown away by gas to be purified, and meanwhile, the adsorbent can be blown and attached to the filter screens by transverse gas, the descending speed of the adsorbent is delayed, and the utilization efficiency of the adsorbent is improved; and the triangular guide plates are arranged 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 from the upper side and the lower side of the left bin and the right bin to pass through the preassembly area and the region to be discharged, the flow dead zone is reduced, and the utilization efficiency of the adsorbent is improved.
2. The device has wide adaptability: the device has no special requirements on the gas to be purified and the adsorbent, the adsorbent can be selected according to the property of the gas to be purified, the adsorption and purification of gases such as methane, coal-fired flue gas, industrial combustion furnace tail gas and the like can be realized, and the device has wide adaptability.
3. The device can run continuously for a long time, and is simple in operation and high in automation degree: the device monitors the pressure difference of the left side and the right side of the descending bed in real time, and controls the flow direction of the gas to be purified by opening and closing the electromagnetic control cut-off valve, and meanwhile, the entering and the discharging of the adsorbent can also be realized by electric control.
Drawings
FIG. 1 is a schematic structural diagram of a bidirectional shift gas purification apparatus provided in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the downer of the bidirectional shift gas purification apparatus shown in FIG. 1;
[ main component symbol description ]
1-a gas inlet; 2-a gas outlet; 3-a gas pipeline; 31-left mounting port; 32-left gas inlet and outlet; 33-right mounting port; 34-right gas inlet and outlet; 4-lower left shutoff valve; 5-upper left shut-off valve; 6-lower right cut-off valve; 7-upper right cutoff valve; 8-a downer; 81-left bin; 82-right chamber; 83-left gas inlet and outlet; 84-right gas inlet and outlet; 85-a filter screen; 9-star valve.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a bidirectional alternate gas purification device and a bidirectional alternate gas purification method aiming at the existing problems, wherein the device has the advantages of ingenious design, simple operation and maintenance and high automation degree, and can realize the 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 shift gas purification apparatus, which includes a gas inlet 1, a gas outlet 2, a gas pipeline 3, a left installation port 31, a left gas inlet and outlet 32, a right installation port 33, a right gas inlet and outlet 34, a left lower shutoff valve 4, a left upper shutoff valve 5, a right lower shutoff valve 6, a right upper shutoff valve 7, and a lower bed 8; wherein:
the gas pipeline 3 is annular and is divided into an upper area, a lower area, a left area and a right area, wherein the lower area of the gas pipeline 3 is provided with the gas inlet 1, the upper area of the gas pipeline is provided with the gas outlet 2, the left side and the right side of a left area middle pipeline of the gas pipeline 3 are respectively provided with the left mounting port 31 and the left gas inlet and outlet 32, the left side and the right side of a right area middle pipeline of the gas pipeline 3 are respectively provided with the right gas inlet and outlet 34 and the right mounting port 33, the upper and lower side pipelines of the left mounting port 31 and the left gas inlet and outlet 32 are provided with the upper left cut-off valve 5 and the lower left cut-off valve 4, the upper and lower side pipelines of the right mounting port 33 and the right gas inlet and outlet 34 are provided with the upper right cut-off valve 7 and the lower right cut-off valve 6, and as an optional mode, the left mounting port 31 and the right mounting port 33 are provided with a gas detector and a pressure sensor, the downer 8 is arranged in an annular central hollow area surrounded by the gas pipeline 3, and the left side and the right side of the downer 8 are respectively connected with a left gas inlet and outlet 32 and a right gas inlet and outlet 34 of the gas pipeline 3.
As further shown in fig. 2, the cross-sectional view of the descending bed of the bidirectional shift gas purification apparatus includes a pre-installation area, an adsorption area and an area to be discharged, the pre-installation area is located at the upper part of the descending bed 8, the fresh adsorbent conveyed from the outside firstly enters the pre-installation area, the adsorption area is located at the middle part of the descending bed 8 next to the pre-installation area, and includes a left chamber 81, a right chamber 82, a left gas inlet/outlet 83, a right gas inlet/outlet 84 and a filter screen 85, the left chamber 81 and the right chamber 82 are located in the middle of the adsorption area, the left side and the right side of the left chamber 81 and the right chamber 82 are respectively provided with the left gas inlet/outlet 83 and the right gas inlet/outlet 84, the left gas inlet/outlet 83 and the right gas inlet/outlet 84 are respectively provided with a trapezoidal contraction port, the left side and the right side of the left chamber 81 and the right chamber 82 are provided with the filter screen 85, as an optional way, the filter screen 85 is a metal filter screen or a nylon filter screen, and is mainly used for preventing the adsorbent from being blown away by the gas to be purified and being taken out of the downer 8, the region to be discharged is closely followed by the adsorption region and is located at the lower part of the downer, a discharge port is arranged at the bottom of the region to be discharged, and a star-shaped valve 9 for controlling the discharge of the adsorbent is further arranged below the discharge port.
The specific use method of the bidirectional shift gas purification device comprises the following steps:
the method comprises the following steps: the adsorbent is selected according to the nature of the gas to be purified, the star valve 9 is closed and adsorbent is fed into the downer 8 until the downer is full.
Step two: and opening a left lower cut-off valve 4 and a right upper cut-off valve 7, closing a left upper cut-off valve 5 and a right lower cut-off valve 6, introducing gas to be purified from the gas inlet 1, introducing the gas into the downer 8 through the left gas inlet and outlet 32 of the gas pipeline 3, adsorbing and purifying the gas by using an adsorbent in the downer 8, and discharging the purified gas from the right gas inlet and outlet 84 of the downer 8.
Step three: monitoring the pressure difference of gas inlets and gas outlets on the left side and the right side of the downer 8, when the pressure difference reaches 5kPa, opening a star-shaped valve 9, discharging the adsorbent saturated in adsorption of a region to be discharged from the star-shaped valve 9 below the downer 8 under control, so that the adsorbent in the adsorption region falls into the region to be discharged, the adsorbent in a pre-installation region falls into the adsorption region, simultaneously replenishing fresh adsorbent to the pre-installation region, closing a lower left cut-off valve 4 and an upper right cut-off valve 7, and opening an upper left cut-off valve 5 and a lower right cut-off valve 6, so that the gas to be purified flows through the downer 8 from right to left and is purified by the adsorbent in the downer until the left-right pressure difference of the downer is monitored to reach 5kPa again.
Step four: and repeating the second step and the third step until all the gas is purified.
For the embodiments of the present invention, the common general knowledge of the known specific structures and characteristics in the schemes is not described too much; the embodiments are described in a progressive manner, technical features related to the embodiments can be combined with each other on the premise of not conflicting with each other, and the same and similar parts among the embodiments can be referred to each other.
In the description of the present invention, the terms "in", "upper", "lower", "left", "right", "inner", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and should not be construed as limiting the present invention; the term "coupled", unless expressly stated or limited otherwise, is to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The utility model provides a two-way gas purification device that turns, its characterized in that includes gas inlet (1), gas outlet (2), gas pipeline (3), lower left cut-off valve (4), upper left cut-off valve (5), lower right cut-off valve (6), upper right cut-off valve (7), down bed (8) and star type valve (9), wherein:
the gas pipeline (3) is annular and comprises an upper area, a lower area, a left area and a right area, the lower area of the gas pipeline (3) is provided with the gas inlet (1), the upper area of the gas pipeline (3) is provided with the gas outlet (2), the left side and the right side of the left area 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 area of the gas pipeline (3) are respectively provided with a right mounting opening (33) and a right gas inlet and outlet (34), the upper part and the lower part of the left mounting opening (31) and the left gas inlet and outlet (32) are respectively provided with an upper left cutting valve (5) and a lower left cutting valve (4), and the upper part and the lower part of the right mounting opening (33) and the right gas inlet and outlet (34) are respectively provided with an upper right cutting valve (7) and a lower cutting valve (6);
the downer (8) is arranged in an annular central empty area surrounded by the gas pipeline (3) and comprises a preassembly area, an adsorption area and an area to be discharged, the pre-loading zone is positioned at the upper part of the downer (8), the adsorbent conveyed from the outside firstly enters the pre-loading zone, the adsorption area is positioned in the middle of the descending bed (8) next to the pre-installation area and comprises a left chamber (81), a right chamber (82), a left gas inlet/outlet (83), a right gas inlet/outlet (84) and a filter screen (85), the left bin (81) and the right bin (82) are arranged in parallel in the middle of the adsorption area, the upper and lower ends of the left chamber (81) and the right chamber (82) are provided with triangular guide plates, the left and right ends are respectively provided with the filter screen (85), the left side of the left chamber (81) is provided with the left gas inlet and outlet (83), the right side of the right chamber (82) is provided with the right gas inlet and outlet (84); left side gas import and export (83) with gas pipeline (3) left side gas access & exit (32) link to each other, right side gas import and export (84) with gas pipeline (3) right side gas access & exit (34) link to each other, treat that the district of arranging is followed closely the adsorption zone is located the lower part of down bed (8), it is provided with the discharge port to treat to arrange the district bottom, the discharge port with star valve (9) link to each other, by the discharge of star valve (9) control adsorbent.
2. 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. Purification apparatus according to claim 1, wherein the left gas inlet and outlet (83, 84) are provided with a trapezoidal constriction.
4. Purification device according to claim 1, wherein the filter screen (85) is a metal filter screen or a nylon filter screen, the mesh of which is smaller than 1 mm.
5. The purification apparatus of claim 1, wherein the shut-off valve is a solenoid valve or an electric valve.
6. Use of a purification device according to any one of claims 1-5, characterized in that it comprises the following steps:
the method comprises the following steps: selecting adsorbent according to the nature of the gas to be purified, closing the star valve (9) and feeding adsorbent into the downer (8) until the downer (8) is full;
step two: opening a left lower cut-off valve (4) and a right upper cut-off valve (7), closing a left upper cut-off valve (5) and a right lower cut-off valve (6), introducing gas to be purified from the gas inlet (1), introducing the gas into the downer (8) through the left gas inlet and outlet (32) in the left area of the gas pipeline (3), adsorbing and purifying the gas by an adsorbent in the downer (8), and discharging the purified gas from a right gas inlet and outlet (84) of the downer (8);
step three: monitoring the pressure difference of gas inlets and gas outlets on the left side and the right side of the downer (8), when the pressure difference reaches 5kPa, opening a star-shaped valve (9), discharging the adsorbent saturated in adsorption of a region to be discharged from the star-shaped valve (9) below the downer (8), so that the adsorbent in the adsorption region falls into the region to be discharged, the adsorbent in a pre-installation region falls into the adsorption region, simultaneously replenishing fresh adsorbent to the pre-installation region of the downer (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 downer (8) from right to left and is purified by the adsorbent in the downer until the pressure difference between the left side and the right side of the downer (8) is monitored to reach 5kPa again;
step four: and repeating the second step and the third step until all the gas is purified.
7. The use method of the purification device according to claim 6, wherein the gas to be purified comprises biogas, coal-fired flue gas or industrial combustion furnace tail gas.
8. The method of using the purification apparatus of claim 6, wherein the adsorbent is at least one of zeolite molecular sieve, metal oxide, activated carbon fiber, or pyrolytic carbon.
9. The method of using the purification apparatus of claim 8, wherein the adsorbent is in the form of particles having a particle size of 1-10 mm.
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