CN108744883B - Exhaust gas treatment device and method thereof - Google Patents
Exhaust gas treatment device and method thereof Download PDFInfo
- Publication number
- CN108744883B CN108744883B CN201810707643.8A CN201810707643A CN108744883B CN 108744883 B CN108744883 B CN 108744883B CN 201810707643 A CN201810707643 A CN 201810707643A CN 108744883 B CN108744883 B CN 108744883B
- Authority
- CN
- China
- Prior art keywords
- adsorption
- rotating wheel
- area
- desorption
- electrolytic tank
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001179 sorption measurement Methods 0.000 claims abstract description 122
- 239000007789 gas Substances 0.000 claims abstract description 86
- 238000003795 desorption Methods 0.000 claims abstract description 58
- 239000003792 electrolyte Substances 0.000 claims abstract description 29
- 239000002912 waste gas Substances 0.000 claims abstract description 22
- 239000003463 adsorbent Substances 0.000 claims description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 238000009826 distribution Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 9
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000012855 volatile organic compound Substances 0.000 abstract description 12
- 238000009825 accumulation Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 44
- 230000008929 regeneration Effects 0.000 description 13
- 238000011069 regeneration method Methods 0.000 description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 238000007872 degassing Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 239000002957 persistent organic pollutant Substances 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 3
- 229910001410 inorganic ion Inorganic materials 0.000 description 3
- 239000010815 organic waste Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 206010037544 Purging Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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
- B01D53/06—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 moving adsorbents, e.g. rotating beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/34—Specific shapes
- B01D2253/342—Monoliths
- B01D2253/3425—Honeycomb shape
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses waste gas treatment equipment, which comprises a runner adsorption device, wherein the runner adsorption device comprises an adsorption area for adsorbing waste gas and a desorption area for desorbing the waste gas, and the waste gas treatment equipment also comprises an electrochemical desorption device, wherein the electrochemical desorption device comprises an electrolytic tank for containing electrolyte; the desorption area of the rotating wheel adsorption device is arranged in the electrolytic tank; the rotating wheel adsorption device can rotate in the electrolytic tank. The invention also discloses an exhaust gas treatment method. Through the implementation mode, the device is simple and convenient, has the characteristics of low energy consumption, small adsorption heat accumulation and high desorption efficiency, and is very suitable for the treatment of VOCs waste gas with large air quantity and low concentration.
Description
Technical Field
The invention relates to the technical field of volatile waste gas treatment, in particular to waste gas treatment equipment and a treatment method thereof.
Background
Volatile organic compounds (Volatile Organic Compounds, VOCs) are strongly photochemically active and are important precursors for the production of Fine Particulate matter (PM 2.5). The strict and effective treatment of volatile organic waste gas is a powerful measure for reducing the PM2.5 concentration in the atmosphere and improving the quality of the ambient air.
Adsorption is one of the most commonly used and effective methods for treating VOCs. Adsorption is a method that utilizes the property of porous adsorbents to attract and concentrate a component or components of a fluid to its surface during the treatment of a fluid mixture to rapidly remove contaminants from the fluid. However, as the solid surface contaminants of the adsorbent increase, the adsorption capacity of the adsorbent gradually decreases, and the adsorbent needs to be replaced or the contaminants are desorbed by a certain method to recover the adsorption capacity of the adsorbent, and the desorption process is also called adsorbent regeneration. Because the replacement of the adsorbent has the problems of high operation and maintenance cost, secondary pollution and the like of the discarded adsorbent, frequent replacement of the new adsorbent is generally not advocated; in regenerating the adsorbent, methods such as temperature rising, pressure reducing, solvent extraction and the like are often used.
In order to facilitate the actual production operation treatment and realize the continuous adsorption and in-situ regeneration of the adsorbent, a parallel adsorption fixed bed and a fluidized adsorption bed are invented.
The parallel adsorption fixed bed is commonly used with more than two adsorption fixed beds, gas adsorption or desorption is alternately carried out on the fixed beds in a pipeline valve switching mode, the equipment is simple in main body structure, suitable for small-air-volume low-concentration waste gas treatment, but high in valve sealing performance and control requirements, and gas explosion risks are caused by accumulation of adsorption heat.
The fluidized adsorption bed enables fluid to pass through the bed body at a higher flow rate, so that the adsorbent is in a suspension fluidization state in the gas-solid contact process, the gas-solid mass transfer efficiency is enhanced, the bed body is divided into an upper adsorption working section and a lower regeneration working section, the equipment is compact, the treatment capacity is high, the equipment structure is complex, the energy consumption is high, and the adsorbent is worn greatly.
Disclosure of Invention
The invention provides the waste gas treatment equipment and the method thereof for solving the technical problems, and the equipment is simple and convenient, has the characteristics of low energy consumption, small adsorption heat accumulation and high desorption efficiency, and is very suitable for the treatment of the VOCs waste gas with large air volume and low concentration.
In order to solve the technical problems, the invention provides an exhaust gas treatment device, which comprises a runner adsorption device, wherein the runner adsorption device comprises an adsorption area for adsorbing exhaust gas and a desorption area for desorbing the exhaust gas, and the exhaust gas treatment device also comprises an electrochemical desorption device, and the electrochemical desorption device comprises an electrolytic tank for containing electrolyte; the desorption area of the rotating wheel adsorption device is arranged in the electrolytic tank; the rotating wheel adsorption device can rotate in the electrolytic tank.
Further, the runner adsorption device comprises a runner and a driving device, the runner runs through a rotating shaft and is rotatably supported on the electrolytic tank through the rotating shaft, the driving device is connected with the rotating shaft to drive the runner to rotate relative to the electrolytic tank, the region of the runner extending into the electrolytic tank is configured as a desorption region of the runner adsorption device, and the region of the runner exposed out of the electrolytic tank is configured as an adsorption region of the runner adsorption device.
Further, the runner adsorption device comprises an outer shell, the outer shell is fixedly arranged on the electrolytic tank and covers the region where the runner is exposed out of the electrolytic tank, the outer shell is fixedly arranged relative to the runner, two independent air distribution cavities are formed in the outer shell, the region of the runner corresponding to one air distribution cavity is configured as an adsorption region, the region of the runner corresponding to the other air distribution cavity is configured as a blowing-off region for blowing and drying, and the adsorption region, the desorption region and the blowing-off region are sequentially connected in the rotation direction.
Further, an adsorption zone air inlet is formed in one side of the outer shell corresponding to the position of the adsorption zone, and an adsorption zone air outlet is formed in the other side of the outer shell; one side of the outer shell corresponding to the position of the stripping zone is provided with a stripping zone air inlet, and the other side is provided with a stripping zone air outlet.
Further, two independent air distribution cavities are formed by arranging air separation plates in the outer shell; the gas separation plate is abutted with the plane of the rotating wheel, and the tail end of the gas separation plate abutted with the plane of the rotating wheel is provided with an elastic sealing strip.
Further, the electrochemical desorption device comprises a direct current power supply arranged outside the electrolytic tank, an anode electrically connected with the positive electrode of the direct current power supply and a cathode electrically connected with the negative electrode of the direct current power supply are arranged in the electrolytic tank, the anode and the cathode are conducted through electrolyte to form an electric field, and the rotating wheel is arranged between the anode and the cathode; the anode and the cathode are in a net structure; the anode is a graphite or lead dioxide electrode, and the cathode is a graphite, stainless steel or activated carbon fiber electrode.
Further, the rotating wheel is made of a honeycomb disc-shaped structure and an activated carbon adsorbent.
Further, the transverse strength of the runner is not lower than 0.3MPa, the longitudinal strength is not lower than 0.8MPa, and the BET specific surface area is not lower than 750m 2 /g, gas flow rate lower than 1.2m/s; the rotating wheel is immersed in the electrolyte in the electrolytic tank, and the depth of the electrolyte is 35-50% of the diameter of the rotating wheel; the rotation period of the rotating wheel is 2-5 h; adsorption zone in the wheel: desorption zone: the area ratio of the stripping zone is 2:3:1.
further, the upper part of the electrolytic tank is provided with a liquid inlet pipe with a valve, and the bottom of the electrolytic tank is provided with an emptying pipe with a valve.
To solve the above technical problems, the present invention further provides an exhaust gas treatment method implemented based on the exhaust gas treatment device according to any one of the above embodiments, including the following steps: injecting electrolyte into the electrolytic tank to submerge a desorption area of the rotating wheel adsorption device; turning on the electrochemical desorption device and rotating the rotating wheel adsorption device; introducing waste gas into the rotating wheel adsorption device; further, the exhaust gas is adsorbed in the adsorption zone of the rotary adsorption device and then desorbed in the desorption zone of the rotary adsorption device.
The exhaust gas treatment equipment and the method provided by the embodiment of the invention have the following advantages:
1. the equipment has the advantages of simple structure, convenient use, mild reaction conditions, small accumulation of adsorption heat and low gas explosion risk, and the rotating wheel adsorption and regeneration are carried out at normal temperature and normal pressure;
2. the rotating wheel adsorption and the electrochemical regeneration process are organically coupled, the adsorbent circularly rotates in a direct current electric field in the form of the rotating wheel, so that synchronous adsorption and regeneration of the adsorbent are realized, the efficiency of contact mass transfer between electrolytic oxide and the adsorbent is improved in the process of rotating and stirring, and the method has the characteristics of in-situ desorption, high desorption efficiency, low energy consumption, no pulverization and degradation phenomena of the adsorbent and prolonged service life of the adsorbent;
3. the equipment runs continuously, has high airspeed, reduced pressure and high adsorption efficiency, and is very suitable for the treatment of VOCs waste gas with large air quantity and low concentration.
Drawings
FIG. 1 is a schematic view of an exhaust gas treatment device according to the present invention;
FIG. 2 is a front view of the exhaust treatment device shown in FIG. 1;
FIG. 3 is a right side view of the exhaust treatment device shown in FIG. 1;
FIG. 4 is a schematic view of the construction of an outer housing of the exhaust gas treatment device of FIG. 1;
FIG. 5 is a schematic view showing the structure of an electrolytic cell in the exhaust gas treatment apparatus shown in FIG. 1;
FIG. 6 is a schematic view of the structure of an electrode in the exhaust gas treatment device shown in FIG. 1.
Detailed Description
The present invention will be described in detail with reference to the drawings and embodiments.
Referring to fig. 1 to 6, the present invention provides an exhaust gas treatment apparatus. The exhaust gas treatment device is for treating exhaust gas, in particular volatile organic gas, the device comprising a rotary wheel adsorption unit comprising an adsorption zone 21 and a desorption zone 22, the adsorption zone 21 being for adsorbing the exhaust gas and the desorption zone 22 being for desorbing the exhaust gas. The exhaust gas treatment device further comprises an electrochemical desorption device comprising an electrolytic cell 5 for containing an electrolyte. The desorption zone 22 of the rotary adsorption device is arranged in the electrolytic tank 5. Wherein the rotary wheel adsorption device can rotate in the electrolytic tank 5.
The runner adsorption device comprises a runner 2 and a driving device 3 connected with the runner 2. The rotating wheel 2 is rotatably supported on the electrolytic tank 5, and part of the rotating wheel 2 extends into the electrolytic tank 5, the rotating wheel 2 can rotate in the electrolytic tank 5 under the drive of the driving device 3, namely, the region of the rotating wheel 2 extending into the electrolytic tank 5 is configured as a desorption region 22, and the rest of the rotating wheel 2 is configured as an adsorption region 21. The whole rotating wheel 2 has adsorption capacity on waste gas to be treated, the rotating wheel 2 is usually supported on the electrolytic tank 5 through a rotating shaft 4 at the center of the rotating wheel and the rotating shaft 4 is used for rotating, the driving device 3 is further connected with the rotating shaft 4, specifically, the driving device 3 comprises a motor 31 and a driving belt 32, one end of the driving belt 32 is connected with the motor 31, and the other end of the driving belt 32 is connected with the rotating shaft 4 so as to realize transmission.
The rotor adsorption device further comprises an outer housing 1. The outer casing 1 can be mounted and fixed on the electrolytic tank 5, the region of the runner 2 exposed out of the electrolytic tank 5 is covered in the outer casing 1, the region of the runner 2 covered by the outer casing 1 is the adsorption region 21, generally, the position of the outer casing 1 is relatively fixed, and the runner 2 can rotate relative to the outer casing 1 under the drive of the driving device 3. The outer casing 1 divides the rotor 2 into the adsorption zone 21 (located inside the outer casing 1) and the desorption zone 22 (located outside the outer casing 1 and inside the electrolytic cell 5). Specifically, an adsorption zone air inlet 12 for introducing exhaust gas is provided in the outer casing 1 at the position of the adsorption zone 21.
Preferably, the runner 2 continuously rotates under the driving of the driving device 3, when the exhaust gas is introduced into the air inlet 12 of the adsorption area, the adsorption area 21 of the runner 2 adsorbs the exhaust gas, and when the runner 2 rotates to the desorption area 22, that is, when the runner 2 rotates to the electrolytic tank 5, the exhaust gas undergoes electrochemical reaction in the electrolytic tank 5 to realize desorption, so that the adsorption performance of the runner 2 is recovered to realize the recycling of the runner 2. Of course, the rotating wheel 2 may also intermittently rotate under the driving of the driving device 3, and in brief, the rotating wheel 2 may stay properly during rotation as required, so that the adsorption zone 21 of the rotating wheel 2 can fully adsorb exhaust gas and the desorption zone 22 of the rotating wheel 2 can fully desorb exhaust gas.
In a specific embodiment, the rotary adsorption apparatus further includes a stripping zone 23 for blowing and drying the rotary wheel 2, where the stripping zone 23 is disposed on the rotary wheel 2, and the adsorption zone 21, the desorption zone 22, and the stripping zone 23 are sequentially connected in the rotation direction of the rotary wheel 2, that is, the exhaust gas treatment process sequentially passes through the adsorption zone 21, the desorption zone 22, and the stripping zone 23 (continuously and repeatedly). The stripping zone 23 and the adsorption zone 21 are two relatively independent areas, and specifically are formed by areas of the rotating wheel 2 corresponding to (i.e. covered by) two independent air distribution chambers formed by the outer casing 1. Further, an air inlet 14 for introducing blow-off gas is provided in the outer case 1 at the position of the blow-off zone 23. When the blowing-off gas is introduced through the air inlet 14 of the blowing-off zone, the blowing-off zone 23 of the rotating wheel 2 is blown and dried by the blowing-off gas so as to further recover the adsorption performance of the rotating wheel 2, wherein the rotating wheel 2 after the blowing-off drying is beneficial to reducing the problem of the reduction of the adsorption capacity of the volatile organic pollutants caused by the moisture competitive adsorption, and provides continuous and stable switching conditions for realizing continuous adsorption and in-situ regeneration of the rotating wheel 2. The blowing and degassing gas introduced into the blowing-off zone 23 may be clean air, nitrogen or the like, and more preferably, the exhaust gas treated in the adsorption zone 21 may not only have a blowing-off and drying effect on the rotor 2, but also have a certain adsorption treatment effect on the exhaust gas.
From the above description, it will be understood that the adsorption zone 21, the desorption zone 22 and the stripping zone 23 do not divide the runner 2 itself into several fixed zones, which are defined mainly according to the treatment performed through a specific location area during the rotation of the runner 2, since the runner 2 is moving and the outer shell 1 and the electrolytic cell 5 are stationary, simply the area of the runner 2 corresponding to the location area of the outer shell 1 where the exhaust gas is introduced is the adsorption zone 21, the area of the runner 2 corresponding to the location area of the electrolytic cell 5 where the runner 2 is immersed is the desorption zone 22, and the area of the runner 2 corresponding to the location area of the outer shell 1 where the exhaust gas is introduced is the stripping zone 23.
Specifically, in order to form the required mutually independent adsorption zone 21 and stripping zone 23, the gas separation plate 16 is generally disposed in the outer casing 1 to form two independent gas distribution chambers respectively, and one gas distribution chamber is disposed in the outer casing 1 corresponding to the adsorption zone 21 and the other gas distribution chamber is disposed corresponding to the stripping zone 23. Wherein the plane of the rotor 2 is in scraping engagement with the gas separation plate 16. Preferably, in order to make the isolation between the air distribution chambers corresponding to the adsorption zone 21 and the stripping zone 23 better, and in order to make the rotating wheel 2 rotate more smoothly, a sealing strip 161 with moderate elasticity may be mounted at the end of the gas separation plate 16 contacting the plane of the rotating wheel 2, and the sealing strip 161 may be made of rubber, silica gel or polytetrafluoroethylene, for example. For example, the gas separation plate 16 may be disposed generally in the outer casing 1 in a radial direction parallel to the rotor 2, and the gas separation plate 16 may further have an arc (still designated 16) at the top, which coincides with the arc length of the rotor 2, and a straight plate (not shown) at the bottom, thereby forming a fan-shaped gas distribution chamber that is independently closed and that adsorbs the gas and blows the non-short flow.
In one embodiment, the adsorption zone inlet 12 and the stripping zone inlet 14 may be disposed on the same side of the outer housing 1.
Further, corresponding to the positions of the adsorption area 21 and the stripping area 23 of the rotating wheel 2, the gas separation plate 16 may be also arranged on the other side of the outer shell 1 to form two mutually independent air distribution cavities, preferably, an elastic sealing strip 161 is also arranged on the end of the gas separation plate 16 contacted with the rotating wheel 2, meanwhile, on the side, the outer shell 1 where the air distribution cavity corresponding to the adsorption area 21 is located is provided with an adsorption area air outlet 13, and on the outer shell 1 where the air distribution cavity corresponding to the stripping area 23 is located is provided with a stripping area air outlet 15. Through this structure setting, can collect waste gas and blow the degasification, avoid environmental pollution. If the tail gas treated by the adsorption zone 21 is required to be introduced into the stripping zone 23 as a blowing gas, the adsorption zone gas outlet 13 and the stripping zone gas inlet 14 can be directly connected by a pipeline.
Of course, the adsorption zone air inlet 12 and the blow-off zone air inlet 14 may also be located on different sides of the outer housing 1, respectively. Correspondingly, the adsorption zone air outlet 13 and the stripping zone air outlet 15 are respectively located on different sides of the outer shell 1.
In one embodiment, the electrochemical desorption device comprises a direct current power source 51 disposed outside the electrolytic cell 5. The positive and negative electrodes of the dc power supply 51 are electrically connected to two electrode sheets mounted in the electrolytic cell 5, respectively, wherein the electrode sheet electrically connected to the positive electrode of the dc power supply 51 is the anode 512, the electrode sheet electrically connected to the negative electrode of the dc power supply 51 is the cathode 511, and the anode 512 and the cathode 511 are electrically connected to each other through the electrolyte contained in the electrolytic cell 5. In order to make the electrochemical reaction more complete, the region where the runner 2 is immersed in the electrolyte is generally disposed between the anode 512 and the cathode 511, that is, the runner 2 is disposed between the anode 512 and the cathode 511. Preferably, the cathode 511 is a graphite, stainless steel or activated carbon fiber electrode, the anode 512 is a graphite or lead dioxide electrode, and more preferably, the cathode 511 and the anode 512 are in a net structure, so that the electrochemical reaction area can be increased, and the desorption efficiency can be improved. Preferably, the rotor 2 is immersed in the desorption zone 22 formed by the electrolyte in the electrolytic bath 5 to a depth of between 35 and 50% of the diameter of the rotor 2, this ratio being generally greater in this range, the better, in order to exploit as much as possible the adsorption properties of the rotor 2. Preferably, the rotation period of the rotating wheel 2 is 2-5 h, so that the full adsorption, desorption and purging treatment are realized, and the treatment capacity of waste gas is improved to the maximum extent.
In order to facilitate the addition of electrolyte to the cell 5, a feed pipe 53 is provided on the cell 5, and a valve, preferably a solenoid valve, may be provided on the feed pipe 53 for remote control. In order to facilitate the discharge of the spent electrolyte, an evacuation pipe 52 is provided at the bottom of the electrolytic cell 5, and a valve, preferably a solenoid valve, may be provided on the evacuation pipe 52 for remote control. In addition, a pH sensor may be installed in the electrolytic tank 5 to detect the depletion degree of the electrolyte by detecting the pH value of the electrolyte, so as to facilitate the timely addition and discharge of the electrolyte.
In a specific embodiment, the rotating wheel 2 may be of various shapes, more preferably a honeycomb disk structure, which can increase the specific surface area of the rotating wheel 2 for adsorption and facilitate the circulation of exhaust gas and blow-off gas in the rotating wheel 2, preferably, the rotating wheel 2 of the honeycomb disk structure has a transverse strength of not less than 0.3MPa, a longitudinal strength of not less than 0.8MPa, and a BET specific surface area of not less than 750m 2 And/g, the gas flow rate is lower than 1.2m/s. The rotor 2 is preferably made of activated carbon adsorbent because the rotor 2 made of activated carbon adsorbent is capable of adsorbing a variety of toxic and harmful gases. The electrolytic tank 5 has a square or semicircular disk structure, and is suitable for the disk shape of the rotating wheel 2, and the electrolytic tank 5 is preferably a semicircular disk structure. Accordingly, the outer casing 1 has a square or semicircular disk structure, and is suitable for the disk shape of the rotating wheel 2, and the outer casing 1 is also preferably a semicircular disk structure.
In one embodiment, rotor 2 is located in suction zone 21: desorption zone 22: the area ratio of the blow-off zone 23 is 2:3:1 to match the processing speed of each region of the rotating wheel 2.
In one embodiment, the electrolyte is a hydrochloride or sulfate electrolyte, the concentration is selected to be 1-15g/L, and the electrolysis current density is 5-15mA/cm 2 。
The main working principle of the waste gas treatment equipment of the invention is introduced as follows:
when the equipment is in operation, volatile organic pollutants are absorbed and concentrated by the activated carbon adsorbent with a honeycomb structure when entering the adsorption zone 21 from the adsorption zone air inlet 12, and purified tail gas is discharged out of the rotating wheel 2 from the adsorption zone air outlet 13.
The region of the rotating wheel 2 adsorbed with the pollutants is driven by the driving device 3 to rotate into the electrolytic tank 5, namely the desorption region 22, the honeycomb-shaped active carbon immersed in the electrolyte in the region of the rotating wheel 2 is polarized under the action of an electric field, reduction reaction and oxidation reaction respectively occur near the cathode 511 and the anode 512, most of the organic pollutants adsorbed on the rotating wheel 2 are decomposed by products with oxidizing property generated by the anode 512, and the small part of the organic pollutants are desorbed under the action of the electrophoresis force.
Taking sodium chloride (NaCl) solution as an electrolyte, the principle of the electrochemical regeneration process is as follows:
the cathode 511 reaction is:
2H 2 O+2e=H 2 +2OH -
Cl 2 +2OH - =ClO - +Cl - +H 2 O
the anode 512 reacts as:
2Cl - -2e=Cl 2
4OH - -4e=2H 2 O+O 2
reaction to hypochlorous acid (HClO) 3 ) Oxygen in initial state [ O ]]Products having oxidizing properties:
2Cl - +9H 2 O-12e=2HClO 3 +16H + +3[O]
wherein hydroxyl radicals (. OH) with a strongly oxidized form are also generated under suitable potential conditions.
H 2 O=·OH+H +
The volatile organic contaminants (R) passing through the desorption zone 22 are oxidatively decomposed by the respective oxidizer electrolysis products.
R+Cl= CO 2 +H 2 0+ inorganic ion
R+ HClO 3 l= CO 2 +H 2 0+ inorganic ion
R+·OH=CO 2 +H 2 0+ inorganic ion
Through electrochemical regeneration, the region of the rotating wheel 2 with the adsorption capacity recovered rotates to the blowing-off zone 23 for blowing and drying, blowing and degassing are introduced into the blowing-off zone 23 from the air inlet 14 of the blowing-off zone, and the blown off tail gas is discharged out of the rotating wheel 2 from the air outlet 15 of the blowing-off zone.
In a specific application, the device is used for treating common 'triphenyl' organic waste gas of industrial sources, and the inlet air quantity of VOCs waste gas is 20000m 3 /h, the air intake volume of the blowing and degassing is 2000 m 3 And/h, exhaust gas intake air quantity and blow-off gas intake air quantityThe ratio of the amounts is 10:1. the equipment comprises a rotating wheel adsorption device and an electrochemical desorption device. The diameter of the runner 2 of the honeycomb activated carbon is 2.6m, the thickness is 0.6m, and the revolution period is 3h. The outer shell 1 of the rotary wheel adsorption device and the electrolytic tank 5 of the electrochemical desorption device are in a semicircular disk shape with equal diameters, an adsorption zone air inlet 12 with the pipe diameter of 600mm and a stripping zone air inlet 14 with the pipe diameter of 250mm are arranged on one side outside the outer shell 1, and an adsorption zone air outlet 13 with the pipe diameter of 600mm and a stripping zone air outlet 15 with the pipe diameter of 250mm are arranged on the other side corresponding to the outside of the outer shell 1. A graphite mesh cathode 511 and a lead dioxide mesh anode 512 are arranged in the electrolytic tank 5, wherein the electrolyte is 5g/L of sodium chloride electrolyte, and the electrolytic current density is 10mA/cm 2 The depth of immersion of the runner 2 in the electrolyte is 45% of the diameter of the runner 2. The VOCs concentration in the inlet air is 300 mg/m 3 ，400 mg/m 3 ，500 mg/m 3 Or 600 mg/m 3 Under the conditions of the same, the concentration of the VOCs of the air outlet treated by the equipment is less than 20mg/m 3 VOCs treatment efficiency is more than 93%.
In addition, the invention also provides an exhaust gas treatment method which is realized based on the exhaust gas treatment equipment.
Specifically, first, a certain volume of electrolyte is injected into the electrolytic cell 5 from the liquid inlet pipe 53, the cathode 511 and the anode 512 are connected, and the dc power supply 51 is turned on, so that an electric field is formed in the electrolytic cell 5. Then the driving device 3 is started, the rotating wheel 2 synchronously rotates in the electrolytic tank 5 along with the rotating shaft 4, and the outer shell 1 is not kept fixed along with the movement of the rotating wheel 2. Simultaneously, volatile organic waste gas to be treated is introduced from an adsorption zone air inlet 12 of the outer shell 1, blowing and degassing are introduced from a blow-off zone air inlet 14 of the outer shell 1, and a desorption zone 22 of the rotating wheel 2 is immersed in electrolyte in the electrolytic tank 5 for electrochemical regeneration.
The exhaust gas treatment equipment and the method provided by the embodiment of the invention have the following advantages:
1. the equipment has the advantages of simple structure, convenient use, mild reaction conditions, small accumulation of adsorption heat and low gas explosion risk, and the adsorption and regeneration of the rotating wheel 2 are carried out at normal temperature and normal pressure;
2. the rotating wheel 2 is organically coupled with the electrochemical regeneration process, the adsorbent circularly rotates in a direct current electric field in the form of the rotating wheel 2, so that synchronous adsorption and regeneration of the adsorbent are realized, the efficiency of contact mass transfer between electrolytic oxide and the adsorbent is improved in the process of rotation and stirring, and the method has the characteristics of in-situ desorption, high desorption efficiency, low energy consumption, no pulverization and degradation phenomena of the adsorbent, and prolonged service life of the adsorbent;
3. the equipment runs continuously, has high airspeed, reduced pressure and high adsorption efficiency, and is very suitable for the treatment of VOCs waste gas with large air quantity and low concentration.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the invention.
Claims (9)
1. The utility model provides an exhaust treatment equipment, includes runner adsorption equipment, runner adsorption equipment includes the adsorption area that waste gas adsorbed and the desorption area that waste gas desorption used, its characterized in that:
the waste gas treatment equipment also comprises an electrochemical desorption device, wherein the electrochemical desorption device comprises an electrolytic tank for containing electrolyte; the desorption area of the rotating wheel adsorption device is arranged in the electrolytic tank; the rotating wheel adsorption device can rotate in the electrolytic tank;
the runner adsorption device comprises a runner, a driving device and an outer shell, wherein the driving device drives the runner to rotate relative to an electrolytic tank, a desorption area is formed in an area where the runner extends into the electrolytic tank, an adsorption area is formed in an area where the runner is exposed out of the electrolytic tank, the outer shell is fixedly arranged on the electrolytic tank and covers the area where the runner is exposed out of the electrolytic tank and is fixedly arranged relative to the runner, two independent air distribution cavities are formed in the outer shell, the area of the runner corresponding to one air distribution cavity is the adsorption area, the area of the runner corresponding to the other air distribution cavity is a blowing-off area for blowing and drying, and the adsorption area, the desorption area and the blowing-off area are sequentially connected in the rotation direction.
2. The exhaust gas treatment device according to claim 1, characterized in that:
the rotating wheel penetrates through the rotating shaft and is rotatably supported on the electrolytic tank through the rotating shaft, the driving device further comprises a motor and a driving belt, one end of the driving belt is connected with the motor, and the other end of the driving belt is connected with the rotating shaft.
3. The exhaust gas treatment device according to claim 1, characterized in that:
an adsorption zone air inlet is formed in one side of the outer shell corresponding to the position of the adsorption zone, and an adsorption zone air outlet is formed in the other side of the outer shell;
one side of the outer shell corresponding to the position of the stripping zone is provided with a stripping zone air inlet, and the other side is provided with a stripping zone air outlet.
4. The exhaust gas treatment device according to claim 1, characterized in that:
the two independent air distribution cavities are formed by arranging air separation plates in the outer shell;
the gas separation plate is abutted with the plane of the rotating wheel, and the tail end of the gas separation plate abutted with the plane of the rotating wheel is provided with an elastic sealing strip.
5. The exhaust gas treatment device according to claim 1, characterized in that:
the electrochemical desorption device comprises a direct current power supply arranged outside the electrolytic tank, an anode electrically connected with the positive electrode of the direct current power supply and a cathode electrically connected with the negative electrode of the direct current power supply are arranged in the electrolytic tank, the anode and the cathode are conducted through electrolyte to form an electric field, and the rotating wheel is arranged between the anode and the cathode;
the anode and the cathode are in a net structure;
the anode is a graphite or lead dioxide electrode, and the cathode is a graphite, stainless steel or activated carbon fiber electrode.
6. The exhaust gas treatment device according to claim 1, characterized in that:
the rotating wheel is made of a honeycomb disc-shaped structure and an activated carbon adsorbent.
7. The exhaust gas treatment device according to claim 6, characterized in that:
the transverse strength of the rotating wheel is not lower than 0.3MPa, the longitudinal strength is not lower than 0.8MPa, and the BET specific surface area is not lower than 750m 2 /g, gas flow rate lower than 1.2m/s;
the rotating wheel is immersed in the electrolyte in the electrolytic tank, and the depth of the electrolyte is 35-50% of the diameter of the rotating wheel;
the rotation period of the rotating wheel is 2-5 h;
adsorption zone in the wheel: desorption zone: the area ratio of the stripping zone is 2:3:1.
8. the exhaust gas treatment device according to claim 1, characterized in that:
the upper part of the electrolytic tank is provided with a liquid inlet pipe with a valve, and the bottom is provided with an emptying pipe with a valve.
9. An exhaust gas treatment method based on an exhaust gas treatment device according to any one of claims 1 to 8, comprising the steps of:
injecting electrolyte into the electrolytic tank to submerge a desorption area of the rotating wheel adsorption device;
turning on the electrochemical desorption device and rotating the rotating wheel adsorption device;
introducing waste gas into the rotating wheel adsorption device;
further, the exhaust gas is adsorbed in the adsorption zone of the rotary adsorption device and then desorbed in the desorption zone of the rotary adsorption device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810707643.8A CN108744883B (en) | 2018-07-02 | 2018-07-02 | Exhaust gas treatment device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810707643.8A CN108744883B (en) | 2018-07-02 | 2018-07-02 | Exhaust gas treatment device and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108744883A CN108744883A (en) | 2018-11-06 |
| CN108744883B true CN108744883B (en) | 2023-11-14 |
Family
ID=63975515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810707643.8A Active CN108744883B (en) | 2018-07-02 | 2018-07-02 | Exhaust gas treatment device and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108744883B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603486B (en) * | 2019-01-24 | 2024-04-05 | 查红平 | Organic waste gas adsorbs electrolytic device |
| CN111701858A (en) * | 2020-06-28 | 2020-09-25 | 陈飞 | A high-efficient separation multiple-layer filtering device for bio-pharmaceuticals |
| CN113278455B (en) * | 2021-06-04 | 2023-09-08 | 邓燕龙 | Natural gas dewatering device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4737164A (en) * | 1984-07-06 | 1988-04-12 | Seinajoen Kylmakone A ja T Saikkonen Ky | Process for recovering contaminants from gases |
| CN101242885A (en) * | 2005-07-28 | 2008-08-13 | 环球研究技术有限公司 | Removal of carbon dioxide from air |
| CN102128480A (en) * | 2010-01-18 | 2011-07-20 | 三洋电机株式会社 | Humidifier |
| CN102161517A (en) * | 2010-04-09 | 2011-08-24 | 上海交通大学 | Organic wastewater activated carbon fiber adsorption device and organic wastewater activated carbon fiber desorption device |
| CN204891542U (en) * | 2015-08-26 | 2015-12-23 | 山东皓隆环境科技有限公司 | VOCs honeycomb runner adsorbs enrichment facility |
| CN107469568A (en) * | 2017-09-07 | 2017-12-15 | 无锡普爱德环保科技有限公司 | VOC runner performance method of testings |
| CN107551760A (en) * | 2017-09-04 | 2018-01-09 | 无锡普爱德环保科技有限公司 | A kind of new VOC concentrations method |
| CN208660745U (en) * | 2018-07-02 | 2019-03-29 | 深圳市正源清环境科技有限公司 | Waste gas treatment equipment |
-
2018
- 2018-07-02 CN CN201810707643.8A patent/CN108744883B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4737164A (en) * | 1984-07-06 | 1988-04-12 | Seinajoen Kylmakone A ja T Saikkonen Ky | Process for recovering contaminants from gases |
| CN101242885A (en) * | 2005-07-28 | 2008-08-13 | 环球研究技术有限公司 | Removal of carbon dioxide from air |
| CN102128480A (en) * | 2010-01-18 | 2011-07-20 | 三洋电机株式会社 | Humidifier |
| CN102161517A (en) * | 2010-04-09 | 2011-08-24 | 上海交通大学 | Organic wastewater activated carbon fiber adsorption device and organic wastewater activated carbon fiber desorption device |
| CN204891542U (en) * | 2015-08-26 | 2015-12-23 | 山东皓隆环境科技有限公司 | VOCs honeycomb runner adsorbs enrichment facility |
| CN107551760A (en) * | 2017-09-04 | 2018-01-09 | 无锡普爱德环保科技有限公司 | A kind of new VOC concentrations method |
| CN107469568A (en) * | 2017-09-07 | 2017-12-15 | 无锡普爱德环保科技有限公司 | VOC runner performance method of testings |
| CN208660745U (en) * | 2018-07-02 | 2019-03-29 | 深圳市正源清环境科技有限公司 | Waste gas treatment equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108744883A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108744883B (en) | Exhaust gas treatment device and method thereof | |
| CN205925352U (en) | Particle crowd electrode electricity catalytic oxidation treated water solubility organic waste gas's device | |
| KR100415216B1 (en) | Method for decomposing halogenated aliphatic hydrocarbon compounds having adsorption process and apparatus for decomposition having adsorption means | |
| CN208660745U (en) | Waste gas treatment equipment | |
| CN108283870B (en) | Plasma waste gas comprehensive treatment device | |
| CN101891331B (en) | Integrated treatment device for active carbon adsorption and electrochemical regeneration and use method thereof | |
| CN109364739B (en) | Continuous removal process for VOCs (volatile organic compounds) in waste gas and special device thereof | |
| CN105601002A (en) | Processing system and method for purifying organic wastewater | |
| CN206219259U (en) | A kind of organic waste-water treating apparatus and system | |
| CN102671647B (en) | Method for treating pollutants with plasmas and recycling adsorbents | |
| CN209501346U (en) | A kind of dedicated unit of the continuous removal technique of exhaust gas VOCs | |
| CN211799851U (en) | Dynamic magnetic control powder activated carbon device | |
| CN106362577A (en) | Gas purification system and method for purifying gas by using gas purification system | |
| CN203408616U (en) | Device for adsorbing coupling electrocatalytic oxidation treated benzene-contained waste gas by particle swarm electrodes | |
| CN212467654U (en) | Organic waste gas device is handled in cooperation of active carbon to low temperature plasma | |
| CN211936337U (en) | Novel environmental protection exhaust purification device | |
| CN115916707A (en) | Sequential reactor for adsorbing contaminants onto activated carbon and electrochemically regenerating activated carbon | |
| CN211837162U (en) | Movable device for treating VOC-containing waste gas | |
| JP4617927B2 (en) | Ventilation device and method for removing harmful substances from ventilation device | |
| CN109319986B (en) | Method for deeply treating desulfurization wastewater by coupling three-dimensional electrolysis and adsorption technology | |
| KR101760067B1 (en) | Regeneration type of deodorization module and food waste treatment apparatus having the same | |
| KR100439431B1 (en) | Method and Device for manufacturing the electrode cell of electrophoresis | |
| CN206940664U (en) | A kind of sewage high-speed rotary processing unit | |
| CN111672318A (en) | Adsorb decomposition integral type and remove formaldehyde equipment | |
| CN201880477U (en) | Device for removing harmful gas in airflow |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |