CN113209772A - Polluted gas adsorption and desorption equipment and method - Google Patents
Polluted gas adsorption and desorption equipment and method Download PDFInfo
- Publication number
- CN113209772A CN113209772A CN202010450962.2A CN202010450962A CN113209772A CN 113209772 A CN113209772 A CN 113209772A CN 202010450962 A CN202010450962 A CN 202010450962A CN 113209772 A CN113209772 A CN 113209772A
- Authority
- CN
- China
- Prior art keywords
- adsorption
- adsorbent
- gas
- microwave
- desorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B01D53/0438—Cooling or heating systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
- B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
-
- 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
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/40094—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating by applying microwaves
Abstract
The invention relates to the technical field of polluted gas treatment, and discloses polluted gas adsorption and desorption equipment and a method. The polluted gas adsorption and desorption equipment disclosed by the invention not only can adsorb the polluted gas in the waste gas, but also can realize uniform and rapid heating of the adsorbent by arranging the annular adsorption channel and adopting different microwave generators to respectively emit microwaves to the adsorbent in the adsorption channel from the inner side and the outer side of the adsorption channel, and can realize thorough desorption of the adsorbent in a short time by coupling desorption methods such as vacuum and blowing, so that the regeneration efficiency and the capacity of repeatedly adsorbing the polluted gas of the adsorbent are obviously improved, and the service life of the adsorbent is effectively prolonged.
Description
Technical Field
The invention relates to the technical field of polluted gas treatment, in particular to polluted gas adsorption and desorption equipment and a method.
Background
In the existing adsorption treatment technology of VOCs (volatile organic compounds), an adsorption tank is generally used to adsorb VOCs in exhaust gas, and in order to realize the reuse of an adsorbent in the adsorption tank, the adsorption tank is also used to desorb the adsorbent by combining with a regeneration method so as to realize the regeneration of the adsorbent.
The existing adsorbent regeneration method adopts a heat conduction regeneration method, and particularly heats the adsorbent from outside to inside in a heat conduction mode by heating inert gas or hot steam. The regeneration method has long heating time, uneven heating temperature and incomplete regeneration of partial adsorbent, and secondary pollution can be generated by hot steam regeneration, so that the regenerated adsorbent is not widely applied.
Disclosure of Invention
The invention aims to solve the problems and provides polluted gas adsorption and desorption equipment and a polluted gas adsorption and desorption method, so that the adsorbent is uniformly and quickly heated, and the thorough and efficient desorption of the adsorbent is facilitated.
In order to achieve the above object, an aspect of the present invention provides a contaminated gas adsorption and desorption apparatus, which includes a housing assembly, a first microwave generator, and a second microwave generator, wherein the housing assembly includes an annular adsorption channel, and a first opening and a second opening which are communicated with the adsorption channel, the first opening is used for allowing a gas to be purified to enter the adsorption channel, the adsorption channel is filled with an adsorbent for adsorbing the contaminated gas in the gas to be purified, the second opening is used for allowing the purified gas purified by the adsorbent to be discharged, the first microwave generator is configured to heat the adsorbent from an inner side of the adsorption channel, and the second microwave generator is configured to heat the adsorbent from an outer side of the adsorption channel.
Optionally, the shell assembly includes an outer shell, a first inner shell and a second inner shell, the outer shell is internally provided with a cavity, the first inner shell and the second inner shell are arranged in the cavity and are cylindrical, the first inner shell is coaxially sleeved outside the second inner shell, a closed annular space is arranged between the first inner shell and the second inner shell to form the adsorption channel, the first microwave generator is arranged to be capable of emitting microwaves to the adsorbent from an inner cavity of the second inner shell, and the second microwave generator is arranged to be capable of emitting microwaves to the adsorbent from the outside of the first inner shell.
Optionally, the adsorbent is a non-polar adsorbent, the outer shell is made of a wave-opaque material, and the first inner shell and the second inner shell are both made of a wave-transparent material.
Optionally, the first microwave generator is mounted on the housing assembly and configured to emit microwaves towards the inner cavity of the second inner housing along the axial direction of the second inner housing; the second microwave generator is arranged outside the first inner shell and is used for emitting microwaves towards the first inner shell along the radial direction of the first inner shell; and/or
The outer shell is cylindrical and coaxially sleeved outside the first inner shell, and a closed annular space is formed between the first inner shell and the outer shell.
Optionally, the housing assembly includes a bottom plate hermetically sealed at the bottom ends of the first inner shell and the second inner shell, the first microwave generator is disposed below the bottom plate, and a first communication port communicating a first microwave break port of the first microwave generator with an inner cavity of the second inner shell is disposed on the bottom plate.
Optionally, the second microwave generator is disposed outside the housing, and a second communication port for communicating a second microwave breach of the second microwave generator with the cavity is formed in a peripheral wall of the housing.
Optionally, the first microwave breach is formed in a horn shape with a gradually increasing diameter extending toward the bottom plate, and a central axis of the first microwave breach coincides with a central axis of the second inner case.
Optionally, the second microwave breach is formed in a trumpet shape with a diameter gradually increasing extending toward a peripheral wall of the outer case, and an axial direction of the second microwave breach is perpendicular to an axial direction of the second inner case.
Optionally, the pollutant gas adsorption and desorption device comprises two first microwave generators and a plurality of second microwave generators, the two first microwave generators are respectively arranged at two axial ends of the second inner shell, and the plurality of second microwave generators are respectively arranged at intervals along the circumferential direction and the axial direction of the outer shell.
Optionally, the first opening is provided at the bottom of the peripheral wall of the first inner shell, and the second opening is located at the top end of the adsorption channel.
Optionally, the contaminated gas adsorption and desorption apparatus includes a vacuum pumping device configured to communicate with the adsorption passage to pump out the contaminated gas adsorbed in the adsorbent, and a purge device configured to be able to introduce a purge gas into the adsorption passage to purge the adsorbent.
Optionally, the vacuum pumping device is configured to communicate with the adsorption channel through the first opening, and the purging device is configured to communicate with the adsorption channel through the second opening.
In another aspect of the present invention, there is provided a method for adsorption and desorption of a contaminated gas, which comprises an adsorption step and a desorption step, using the contaminated gas adsorption and desorption apparatus described above, wherein,
the adsorption step comprises: introducing gas to be purified into the adsorption channel, and discharging the gas to be purified out of the adsorption channel after the gas to be purified is subjected to adsorption treatment by the adsorbent;
the desorption step comprises: and after the adsorbent is saturated in adsorption, the vacuumizing device is used for sucking the polluted gas adsorbed in the adsorbent, when the pressure in the adsorption channel reaches a preset value, the purging device is used for introducing purified gas into the adsorption channel to purge the adsorbent, and the first microwave generator and the second microwave generator are used for emitting microwaves to the adsorbent to heat the adsorbent.
Optionally, the predetermined value is 0-20 KPa.
Optionally, the heated temperature of the sorbent does not exceed 120 ℃.
Through the technical scheme, the polluted gas adsorption and desorption equipment disclosed by the invention not only can adsorb the polluted gas in the waste gas, but also can realize uniform and rapid heating of the adsorbent by arranging the annular adsorption channel and adopting different microwave generators to respectively emit microwaves to the adsorbent in the adsorption channel from the inner side and the outer side of the adsorption channel, and can realize thorough desorption of the adsorbent in a short time by coupling desorption methods such as vacuum and blowing, so that the regeneration efficiency and the capacity of repeatedly adsorbing the polluted gas of the adsorbent are obviously improved, and the service life of the adsorbent is effectively prolonged.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic configuration diagram of an embodiment of the contaminated gas adsorption and desorption apparatus in the present invention.
Description of the reference numerals
100-polluted gas adsorption and desorption equipment, 110-outer shell, 111-top wall, 112-bottom wall, 113-cavity, 120-first inner shell, 121-top cover, 130-second inner shell, 131-inner cavity, 140-adsorption channel, 141-first pipeline, 142-second pipeline, 143-bottom plate, 150-adsorbent, 160-first microwave generator, 161-first microwave breach, 170-second microwave generator and 171-second microwave breach.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, use of the terms "upper, lower, top, and bottom" generally refer to the orientation as shown in the drawings. "inner and outer" refer to the inner and outer contours of the respective component itself.
In one aspect, the present invention provides a contaminated gas adsorption and desorption apparatus, where the contaminated gas adsorption and desorption apparatus 100 includes a housing assembly, a first microwave generator 160, and a second microwave generator 170, the housing assembly includes an annular adsorption channel 140, and a first opening and a second opening which are communicated with the adsorption channel 140, the first opening is used for allowing a gas to be purified to enter the adsorption channel 140, the adsorption channel 140 is filled with an adsorbent 150 for adsorbing the contaminated gas in the gas to be purified, the second opening is used for allowing the purified gas purified by the adsorbent 150 to be discharged, the first microwave generator 160 is configured to heat the adsorbent 150 from an inner side of the adsorption channel 140, and the second microwave generator 170 is configured to heat the adsorbent 150 from an outer side of the adsorption channel 140.
Through the technical scheme, the polluted gas adsorption and desorption equipment 100 disclosed by the invention not only can adsorb the polluted gas in the waste gas, but also can realize uniform and rapid heating of the adsorbent by arranging the annular adsorption channel 140 and respectively emitting microwaves to the adsorbent 150 in the adsorption channel 140 from the inner side and the outer side of the adsorption channel 140 by adopting different microwave generators, and can realize thorough desorption of the adsorbent in a short time by coupling desorption methods such as vacuum and blowing, so that the regeneration efficiency of the adsorbent and the capacity of repeatedly adsorbing the polluted gas are obviously improved, and the service life of the adsorbent is effectively prolonged.
Wherein the housing assembly may have any suitable structure to form the adsorption channel 140. According to an embodiment of the present invention, as shown in fig. 1, the housing assembly may include an outer housing 110 defining a cavity 113 therein, and a first inner housing 120 and a second inner housing 130 disposed in the cavity 113 and having a cylindrical shape, wherein the first inner housing 120 is coaxially sleeved outside the second inner housing 130, and a closed annular space is disposed between the first inner housing 120 and the second inner housing 130 to form an adsorption passage 140. In this case, the first microwave generator 160 is provided to be able to emit microwaves from the inner cavity 131 of the second inner case 130 toward the adsorbent 150, and the second microwave generator 170 is provided to be able to emit microwaves from the outside of the first inner case 120 toward the adsorbent 150.
In the present invention, the adsorbent 150 may be a nonpolar adsorbent or a mixture of a nonpolar adsorbent and a polar adsorbent. The outer shell 110 is made of a wave-opaque material, and the first inner shell 120 and the second inner shell 130 are made of a wave-transparent material.
In the above, it should be noted that the housing 110 is made of a wave-opaque material to prevent the microwave in the cavity 113 from leaking, and the cavity 113 is sealed. The first opening and the second opening may be provided at any position of the housing assembly that can communicate the adsorption passage 140 with the outside. The gas to be purified refers to an exhaust gas containing a contaminant gas, and the contaminant gas may be a gas having a polarity such as VOCs. The non-polar adsorbent can be activated carbon, and the polar adsorbent can be silica gel, zeolite, etc. Because the adsorption channel 140 is annular, the adsorbent 150 filled in the adsorption channel 140 is also annular, so that the contact area between the adsorbent and the gas to be purified can be increased, and the adsorption effect is obviously enhanced. The radial width of the adsorption channel 140 may be 10cm to 150 cm. The housing 110 may be made of stainless steel, aluminum, or the like. The first inner casing 120 and the second inner casing 130 may be made of quartz, mica, or ceramic. The first and second microwave generators 160 and 170 may be respectively connected to an external microwave power source (not shown) for generating a microwave electric field to heat the adsorbent 150. Wherein the frequency of the external microwave power supply may be, for example, 915 MHz.
In the present invention, the outer case 110 may have any suitable shape as long as it can accommodate the first and second inner cases 120 and 130. In an embodiment of the present invention, the outer shell 110 is cylindrical and coaxially sleeved outside the first inner shell 120, and a closed annular space is formed between the first inner shell 120 and the outer shell 110. Specifically, as shown in the embodiment of fig. 1, the outer shell 110, the first inner shell 120, and the second inner shell 130 are all cylindrical, the outer shell 110 includes a top wall 111, a bottom wall 112, and a peripheral wall for defining the cavity 113, the top wall 111 and the bottom wall 112 are annular, outer sides of the top wall 111 and the bottom wall 112 are respectively connected to a top end and a bottom end of the peripheral wall in a sealing manner, and inner sides of the top wall 111 and the bottom wall 112 are respectively connected to the peripheral wall of the first inner shell 120 in a sealing manner.
In addition, in order to achieve the sealing of the suction passage 140, the housing assembly may include a bottom plate 143 that seals the bottom ends of the first and second inner casings 120 and 130. The bottom end of the adsorption passage 140 is sealed by a bottom plate 143. In this case, the first opening may be opened at the bottom of the circumferential wall of the first inner case 120. The second inner case 130 has a top wall defining an inner cavity 131 thereof, and the housing assembly further includes a top cap 121 sealing a top end of the suction passage 140, and a second opening opened in the top cap 121.
In the present invention, the first and second microwave generators 160 and 170 may be arbitrarily disposed as long as microwaves can be radiated to the adsorbent 150 from the inside and the outside of the adsorption passage 140, respectively. According to an embodiment of the present invention, a first microwave generator 160 is mounted on the housing assembly and is configured to emit microwaves toward the inner cavity 131 of the second inner case 130 in the axial direction of the second inner case 130; the second microwave generator 170 is installed outside the first inner case 120 and is configured to emit microwaves toward the first inner case 120 in a radial direction of the first inner case 120. Here, it can be understood that the microwaves entering the inner cavity 131 of the second inner case 130 in the axial direction of the second inner case 130 may be radiated along the inner wall of the second inner case 130 and penetrate through the second inner case 130 to enter the adsorption passage 140, which may cause the entire inner side of the adsorption passage 140 to be radiated, thereby further improving the heating effect.
Specifically, as shown in fig. 1, the first microwave generator 160 may be disposed below the bottom plate 143, and the bottom plate 143 is provided with a first communication port for communicating the first microwave breach 161 of the first microwave generator 160 with the inner cavity 131 of the second inner housing 130; the second microwave generator 170 may be disposed outside the housing 110, and a second communication port for communicating the second microwave breach 171 of the second microwave generator 170 with the cavity 113 is opened on the peripheral wall of the housing 110.
Preferably, the first microwave crush port 161 is formed in a horn shape with a gradually increasing diameter extending toward the bottom plate 143, and a central axis of the first microwave crush port 161 coincides with a central axis of the second inner case 130; the second microwave crush port 171 is formed in a horn shape having a gradually increasing diameter extending toward the peripheral wall of the outer case 110, and the axial direction of the second microwave crush port 171 is perpendicular to the axial direction of the second inner case 130. By providing the first microwave break 161 and the second microwave break 171 in a horn shape, the microwave radiation range can be expanded, thereby achieving uniform heating.
In the present invention, the number of the first and second microwave generators 160 and 170 is not limited. In order to heat the adsorbent 150 more uniformly and rapidly, according to a preferred embodiment of the present invention, the contaminated gas adsorption-desorption apparatus 100 includes two first microwave generators 160 and a plurality of second microwave generators 170, the two first microwave generators 160 being respectively disposed at both axial ends of the second inner casing 130, and the plurality of second microwave generators 170 being respectively spaced apart in the circumferential direction and the axial direction of the outer casing 110 (i.e., being arranged in a plurality of rows in the circumferential direction of the outer casing 110). Of course, in another embodiment, the pollutant gas adsorption and desorption apparatus 100 may comprise a second microwave generator 170, wherein the second microwave generator 170 has a plurality of second microwave mouths 171, and the plurality of second microwave mouths 171 are arranged at intervals along the circumferential direction and the axial direction of the housing 110.
In the present invention, the contaminated gas adsorption and desorption apparatus 100 may further include a vacuum pumping device provided in communication with the adsorption passage 140 to pump out the contaminated gas adsorbed in the adsorbent 150, and a purge device provided to be able to introduce a purge gas into the adsorption passage 140 to purge the adsorbent 150. Thus, the contaminated gas adsorption and desorption apparatus 100 can be coupled with three desorption methods of microwave, vacuum and purge to realize thorough desorption of the adsorbent in a short time, thereby significantly improving the regeneration efficiency of the adsorbent and the ability of repeatedly adsorbing the contaminated gas, and effectively prolonging the service life of the adsorbent.
Wherein, in order to simplify the apparatus structure, the vacuum pumping means may be provided to communicate with the adsorption passage 140 through the first opening, and the purge means may be provided to communicate with the adsorption passage 140 through the second opening. Specifically, as shown in fig. 1, the contaminated gas adsorption and desorption apparatus 100 may include a first pipe 141 connected to the first opening and a second pipe 142 connected to the second opening, the first pipe 141 may be connected to an air intake line and a desorption line (not shown), respectively, and may selectively communicate with the air intake line or the desorption line through a switching valve, the desorption line being connected to the vacuum pumping device; the second conduit 142 may be connected to the gas outlet line and the purge line, respectively, and may selectively communicate with the gas outlet line or the purge line connected to the purge device through a switching valve. Thus, air can be fed and exhausted through the first opening, and air can be discharged and fed through the second opening. That is, during the adsorption process of the adsorbent 150, the first opening is a gas inlet for the gas to be purified to enter the adsorption channel 140, and the second opening is a gas outlet for the purified gas to be discharged; during desorption of the adsorbent 150, the first opening is a gas outlet for discharging desorbed contaminant gas, and the second opening is a gas inlet for allowing purge gas to enter the adsorption passage 140.
According to another embodiment of the present invention, the second pipe 142 may not be connected to the purge line, but a control valve for controlling the on/off of the second pipe 142 is provided on the second pipe 142, and during the adsorption process of the adsorbent 150, the second pipe 142 is completely communicated with the gas outlet line through the control valve, so as to allow the purge gas to be discharged; during desorption of the adsorbent 150, the second conduit 142 is completely disconnected from the gas outlet line by the control valve, and when purging of the adsorbent 150 is required, the second conduit 142 is partially communicated with the gas outlet line by the control valve, so that the purified gas in the gas outlet line is returned as a purge gas into the adsorption passage 140 to purge the adsorbent 150. That is, in this embodiment, the purge means is implemented by the cooperation of the second conduit 142, the outlet line, and the control valve.
In another aspect of the present invention, there is provided a method for adsorption and desorption of a contaminated gas, which employs a contaminated gas adsorption and desorption apparatus 100, comprising an adsorption step and a desorption step, wherein,
the adsorption step comprises: introducing a gas to be purified into the adsorption channel 140, so that the gas to be purified is exhausted out of the adsorption channel 140 after being adsorbed by the adsorbent 150;
the desorption step comprises: after the adsorbent 150 is saturated by adsorption, the contaminated gas adsorbed in the adsorbent 150 is sucked by the vacuum-pumping device, and when the pressure in the adsorption channel 140 reaches a predetermined value, a purge gas is introduced into the adsorption channel 140 by the purge device to purge the adsorbent 150, and microwaves are emitted to the adsorbent 150 by the first and second microwave generators 160 and 170 to heat the adsorbent 150.
Wherein the predetermined value is preferably 0 to 20KPa (absolute pressure), preferably 0 to 10KPa, and more preferably 7.5 KPa. The heated temperature of the adsorbent 150 is not more than 120 c, preferably 65 c, that is, the heating temperature of the microwave electric field generated by the first and second microwave generators 160 and 170 is not more than 120 c.
Referring to fig. 1, the method for adsorbing and desorbing contaminated gas according to the present invention will be described in detail, taking the contaminated gas as VOCs as an example, and the method includes:
operating the switching valve to enable the air inlet pipeline to be communicated with the first opening, enabling the gas to be purified conveyed by the air inlet pipeline to enter the adsorption channel 140 through the first opening and pass through the adsorbent 150 in the adsorption channel 140 from bottom to top, and enabling the adsorbent 150 to adsorb VOCs in the gas to be purified for purification treatment, and then discharging the generated purified gas through the second opening; after the adsorbent 150 is saturated by adsorption, the desorption pipeline is communicated with the first opening by operating the switching valve, the second pipeline 142 is completely disconnected from the gas outlet pipeline by the control valve, the vacuumizing device is started, the VOCs adsorbed on the adsorbent 150 are desorbed from the gap of the adsorbent 150 until the pressure in the adsorption channel 140 reaches 5KPa, the second pipeline 142 is partially communicated with the gas outlet pipeline by the control valve, a certain amount of purified gas is introduced from the gas outlet pipeline to purge the adsorbent 150, purging-assisted desorption is carried out, the external microwave power supply is started while purging-assisted desorption is carried out, microwaves are radiated to the adsorbent 150 by the first microwave generator 160 and the second microwave generator 170, VOCs molecules which are difficult to desorb in the pores of the adsorbent 150 are heated, so that the VOCs molecules vibrate violently, and desorption from the pores of the adsorbent is accelerated under the action of the purging gas, thereby achieving thorough desorption of the adsorbent. Thus, VOCs treatment is completed and complete regeneration of the adsorbent 150 is achieved, thereby achieving recycling of the adsorbent.
Specifically, when the adsorbent 150 is heated, the adsorbent is desorbed by heating the adsorbent from 30 ℃ to 65 ℃ at a temperature of 15 ℃/min for 2.3min and maintaining the temperature for 60 min. The regeneration rate of the adsorbent 150 (mass of desorbed VOCs in mass percent of adsorbed VOCs) can be up to 90% or more, with a COV value of 0.3. Fresh specific surface area of 1200m2After desorption of 150 times of the adsorbent per g, the specific surface area was 1195m2/g。
Wherein the content of the first and second substances,
Tiis the temperature value of the adsorbent at any point in the adsorption channel 140; t isaIs the average temperature value of the adsorbent in the adsorption channel 140; t is0Is the initial average temperature of the adsorbent in the adsorption channel 140; n is the number of adsorbent measurements in the area being measured, the COV value represents the uniformity of the adsorbent temperature within the adsorption channel 140, and the smaller the COV value, the higher the temperature uniformity.
The polluted gas adsorption and desorption device 100 disclosed by the invention not only can adsorb and treat polluted gas, but also can be coupled with a desorption method of vacuum, blowing and microwave to ensure that the adsorbent can be thoroughly regenerated in a short time, so that the regeneration efficiency of the adsorbent is obviously improved, the capability of the adsorbent for repeatedly absorbing the polluted gas can be effectively ensured, and the service life of the adsorbent is effectively prolonged. The contaminated gas adsorption and desorption apparatus 100 heats by using microwave electric field radiation, and not only has a fast temperature rise speed, but also heats uniformly. In addition, the polluted gas adsorption and desorption device 100 has the advantages of simple structure, convenient operation, low production and manufacturing cost, high polluted gas treatment efficiency and high adsorbent desorption and regeneration efficiency. In addition, the pollutant gas adsorption and desorption method can completely desorb the adsorbent by coupling the desorption methods of vacuum, blowing and microwave, thereby prolonging the regeneration cycle service life of the adsorbent, enhancing the cycle adsorption effect of the adsorbent, greatly improving the pollution gas treatment efficiency and obviously enhancing the treatment effect.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (14)
1. A contaminated gas adsorption and desorption apparatus, characterized in that the contaminated gas adsorption and desorption apparatus (100) comprises a housing assembly, a first microwave generator (160) and a second microwave generator (170), the housing assembly includes an annular suction passage (140) and first and second openings communicating with the suction passage (140), the first opening is used for allowing gas to be purified to enter the adsorption channel (140), the adsorption channel (140) is filled with an adsorbent (150) for adsorbing pollution gas in the gas to be purified, the second opening is used for discharging purified gas purified by the adsorbent (150), the first microwave generator (160) is provided so as to be able to heat the adsorbent (150) from the inside of the adsorption channel (140), the second microwave generator (170) is provided to be able to heat the adsorbent (150) from the outside of the adsorption channel (140).
2. The contaminant gas adsorption and desorption apparatus according to claim 1, wherein the housing assembly comprises an outer housing (110) defining a cavity (113) therein, and a first inner housing (120) and a second inner housing (130) disposed in the cavity (113) and having a cylindrical shape, the first inner housing (120) is coaxially sleeved outside the second inner housing (130), a closed annular space is provided between the first inner housing (120) and the second inner housing (130) to form the adsorption passage (140), the first microwave generator (160) is configured to emit microwaves from an inner cavity (131) of the second inner housing (130) to the adsorbent (150), and the second microwave generator (170) is configured to emit microwaves from an outside of the first inner housing (120) to the adsorbent (150).
3. The polluted gas adsorption and desorption apparatus according to claim 2, wherein the adsorbent (150) is a non-polar adsorbent, the outer casing (110) is made of a wave-opaque material, and the first inner casing (120) and the second inner casing (130) are both made of a wave-transparent material.
4. The contaminated gas adsorption and desorption apparatus according to claim 2,
the first microwave generator (160) is mounted on the housing assembly and is configured to emit microwaves towards the inner cavity (131) of the second inner housing (130) along the axial direction of the second inner housing (130); the second microwave generator (170) is installed outside the first inner case (120) and is configured to emit microwaves toward the first inner case (120) in a radial direction of the first inner case (120); and/or
The outer shell (110) is cylindrical and coaxially sleeved outside the first inner shell (120), and a closed annular space is formed between the first inner shell (120) and the outer shell (110).
5. The polluted gas adsorption and desorption apparatus according to claim 4, wherein the housing assembly includes a bottom plate (143) hermetically sealing the bottom ends of the first inner housing (120) and the second inner housing (130), the first microwave generator (160) is disposed below the bottom plate (143), and a first communication port communicating a first microwave breach (161) of the first microwave generator (160) with the inner cavity (131) of the second inner housing (130) is formed in the bottom plate (143).
6. The contaminated gas adsorption and desorption apparatus according to claim 5, wherein the first microwave breach (161) is formed in a horn shape having a gradually increasing diameter extending toward the bottom plate (143), and a central axis of the first microwave breach (161) coincides with a central axis of the second inner casing (130).
7. The polluted gas adsorption and desorption apparatus according to claim 4, wherein the second microwave generator (170) is disposed outside the housing (110), and a second communication port for communicating a second microwave break port (171) of the second microwave generator (170) with the cavity (113) is opened in a peripheral wall of the housing (110).
8. The contaminated gas adsorption and desorption apparatus according to claim 7, wherein the second microwave breach 171 is formed in a trumpet shape having a diameter gradually increasing extending toward a peripheral wall of the outer casing 110, and an axial direction of the second microwave breach 171 is perpendicular to an axial direction of the second inner casing 130.
9. The contaminated gas adsorption and desorption apparatus according to claim 4, wherein the contaminated gas adsorption and desorption apparatus (100) includes two of the first microwave generators (160) and a plurality of the second microwave generators (170), the two first microwave generators (160) being respectively provided at both axial ends of the second inner casing (130), the plurality of the second microwave generators (170) being respectively arranged at intervals in a circumferential direction and an axial direction of the outer casing (110).
10. The contaminated gas adsorption and desorption apparatus according to claim 2, wherein the first opening is opened at the bottom of the peripheral wall of the first inner casing (120), and the second opening is located at the top end of the adsorption passage (140).
11. The contaminated gas adsorption and desorption apparatus according to any one of claims 1 to 10, wherein the contaminated gas adsorption and desorption apparatus (100) comprises a vacuum evacuation device arranged to communicate with the adsorption passage (140) to evacuate the contaminated gas adsorbed in the adsorbent (150), and a purge device arranged to be able to introduce a purge gas into the adsorption passage (140) to purge the adsorbent (150).
12. The contaminant gas adsorption and desorption apparatus according to claim 11, wherein the evacuation means is provided so as to communicate with the adsorption passage (140) through the first opening, and the purge means is provided so as to communicate with the adsorption passage (140) through the second opening.
13. A method for adsorption and desorption of a contaminated gas, which employs the contaminated gas adsorption and desorption apparatus (100) according to claim 11 or 12, and which comprises an adsorption step and a desorption step, wherein,
the adsorption step comprises: introducing gas to be purified into the adsorption channel (140), and discharging the gas to be purified out of the adsorption channel (140) after the gas to be purified is subjected to adsorption treatment by the adsorbent (150);
the desorption step comprises: and sucking the polluted gas adsorbed in the adsorbent (150) by the vacuumizing device after the adsorbent (150) is saturated in adsorption, introducing purified gas into the adsorption channel (140) by the purging device to purge the adsorbent (150) when the pressure in the adsorption channel (140) reaches a preset value, and simultaneously emitting microwaves to the adsorbent (150) by the first microwave generator (160) and the second microwave generator (170) to heat the adsorbent (150).
14. The contaminant gas adsorption/desorption method according to claim 13, wherein the predetermined value is 0 to 20KPa, and/or the heated temperature of the adsorbent (150) does not exceed 120 ℃.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010071475 | 2020-01-21 | ||
| CN2020100714755 | 2020-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113209772A true CN113209772A (en) | 2021-08-06 |
Family
ID=77085733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010450962.2A Pending CN113209772A (en) | 2020-01-21 | 2020-05-25 | Polluted gas adsorption and desorption equipment and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113209772A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113797701A (en) * | 2021-09-28 | 2021-12-17 | 青岛诺诚化学品安全科技有限公司 | Activated carbon regeneration system and process method based on vacuum and microwave synergistic effect |
| CN115228236A (en) * | 2022-06-21 | 2022-10-25 | 青岛中平环境技术研究院有限公司 | Fixed bed VOCs gas treatment and recovery device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4312641A (en) * | 1979-05-25 | 1982-01-26 | Pall Corporation | Heat-reactivatable adsorbent gas fractionator and process |
| CN102371105A (en) * | 2011-11-07 | 2012-03-14 | 常州大学 | Integrative rotary type adsorber |
| CN203417578U (en) * | 2013-07-01 | 2014-02-05 | 马军 | Microwave desorption adsorption device |
| CN107106965A (en) * | 2014-12-31 | 2017-08-29 | 艾可普罗有限公司 | Air cleaning system |
| CN107321337A (en) * | 2017-08-29 | 2017-11-07 | 湖北工程学院 | A kind of method of sorbent regeneration system and adsorbent reactivation |
| CN208526211U (en) * | 2019-01-16 | 2019-02-22 | 烟台盛泽环保科技有限公司 | A kind of activated carbon adsorber with regenerating unit |
| CN110090527A (en) * | 2019-05-20 | 2019-08-06 | 常州大学 | A kind of embedded microwave cycle adsorption-desorption tower and its operating method |
-
2020
- 2020-05-25 CN CN202010450962.2A patent/CN113209772A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4312641A (en) * | 1979-05-25 | 1982-01-26 | Pall Corporation | Heat-reactivatable adsorbent gas fractionator and process |
| CN102371105A (en) * | 2011-11-07 | 2012-03-14 | 常州大学 | Integrative rotary type adsorber |
| CN203417578U (en) * | 2013-07-01 | 2014-02-05 | 马军 | Microwave desorption adsorption device |
| CN107106965A (en) * | 2014-12-31 | 2017-08-29 | 艾可普罗有限公司 | Air cleaning system |
| CN107321337A (en) * | 2017-08-29 | 2017-11-07 | 湖北工程学院 | A kind of method of sorbent regeneration system and adsorbent reactivation |
| CN208526211U (en) * | 2019-01-16 | 2019-02-22 | 烟台盛泽环保科技有限公司 | A kind of activated carbon adsorber with regenerating unit |
| CN110090527A (en) * | 2019-05-20 | 2019-08-06 | 常州大学 | A kind of embedded microwave cycle adsorption-desorption tower and its operating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113797701A (en) * | 2021-09-28 | 2021-12-17 | 青岛诺诚化学品安全科技有限公司 | Activated carbon regeneration system and process method based on vacuum and microwave synergistic effect |
| CN115228236A (en) * | 2022-06-21 | 2022-10-25 | 青岛中平环境技术研究院有限公司 | Fixed bed VOCs gas treatment and recovery device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113209772A (en) | Polluted gas adsorption and desorption equipment and method | |
| WO2007004426A1 (en) | Apparatus for volatile organic compound treatment and method of volatile organic compound treatment | |
| JP2011152526A (en) | Adsorption tower equipped with flow passage for heating medium feeding and use of the adsorption tower | |
| JP3044279B2 (en) | Simple gas adsorption recovery method | |
| JPH037413B2 (en) | ||
| CN102671647B (en) | Method for treating pollutants with plasmas and recycling adsorbents | |
| CN106000098A (en) | Intelligent auto-regeneration gas treatment system for VOCs (volatile organic chemicals) | |
| KR101404817B1 (en) | Apparatus for Purifying Discharge Gas using Rotor | |
| JP2019188319A (en) | Apparatus and method for separating carbon dioxide | |
| CN113209773A (en) | VOCs adsorption and desorption equipment and method | |
| CN103127810A (en) | Inhomogeneous field strength plasma waste gas processing apparatus and processing system thereof | |
| CN213254480U (en) | Novel active carbon regeneration furnace device | |
| JP2001149751A (en) | Device for treating waste gas containing volatile organic material | |
| KR101454354B1 (en) | Exhaustion Apparatus and Method of Painting System | |
| KR101404816B1 (en) | Apparatus for Purifying Discharge Gas of Painting System | |
| CN201433258Y (en) | Active carbon fiber situ regeneration device | |
| CN214287412U (en) | VOC adsorption device for automobile paint spraying workshop | |
| KR101493460B1 (en) | Exhaustion Apparatus and Apparatus for Purifying Discharge Gas of Painting System | |
| CN114940916B (en) | Oil gas circulation recovery device | |
| CN218634331U (en) | Microwave tube type device for regenerating waste activated carbon | |
| US20230372898A1 (en) | Plasma generation of sorbent beds | |
| CN217410256U (en) | Desorption regeneration equipment | |
| KR102331408B1 (en) | Carbon dioxide removal and regeneration device in the air and a method of using the same | |
| KR100443155B1 (en) | A carbonizing treating appartus for waste matter | |
| JP3606503B2 (en) | Adsorption sheet and method of manufacturing adsorption element using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |