LU102211B1 - Device and method for purifying and recovering VOCs in exhaust gas - Google Patents

Device and method for purifying and recovering VOCs in exhaust gas Download PDF

Info

Publication number
LU102211B1
LU102211B1 LU102211A LU102211A LU102211B1 LU 102211 B1 LU102211 B1 LU 102211B1 LU 102211 A LU102211 A LU 102211A LU 102211 A LU102211 A LU 102211A LU 102211 B1 LU102211 B1 LU 102211B1
Authority
LU
Luxembourg
Prior art keywords
vocs
adsorbent
exhaust gas
duct
outlet
Prior art date
Application number
LU102211A
Other languages
French (fr)
Inventor
Xueyang Zhang
Lingyu Cao
Yuanyuan Sun
Wei Xiang
Chengcheng Cao
Original Assignee
Univ Xuzhou Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Univ Xuzhou Technology filed Critical Univ Xuzhou Technology
Application granted granted Critical
Publication of LU102211B1 publication Critical patent/LU102211B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • 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
    • B01D53/10—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 with dispersed adsorbents
    • B01D53/12—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 with dispersed adsorbents according to the "fluidised technique"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/001—Article feeders for assembling machines
    • B23P19/006—Holding or positioning the article in front of the applying tool
    • 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
    • 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
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/40096—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating by using electrical resistance heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

Disclosed is a device and a method for purifying and recovering VOCs in an exhaust gas, including an adsorption reactor, an adsorbent regeneration system, a VOCs collection system, a fluidized-bed inner tank, an ash hopper, a partition plate, a three-way control valve, an inlet duct, a first outlet duct and a second outlet duct; the exhaust gas containing VOCs is purified through the adsorption reactor, so that the exhaust gas does not contain VOCs before being discharged; the adsorbent regeneration system can vaporize and desorb a magnetic biochar adsorbent that has adsorbed VOCs, so that the magnetic biochar adsorbent has the adsorption capacity for VOCs again to realizes reuse; the VOCs collection system can condense and liquefy the desorbed VOCs vapor to realize the collection of VOCs; therefore, the present invention can purify and recover VOCs in the exhaust gas at the same time without causing secondary pollution to the environment, thereby effectively improving the application range of VOCs purification and recovery.

Description

UA 4022 M | BL-5170 1 | LU102211 .
The present invention relates to a device and a method for purifying and . recovering VOCs in an exhaust gas, which belongs to the technical field of exhaust . gas purification. . Volatile organic compounds (VOCs) are organic compounds with high saturated | vapor pressure (> 133.32Pa) and low boiling point (50-250 °C) at room temperature. | Most VOCs are toxic, mutagenic and carcinogenic, which seriously affect human f health. In addition, VOCs can also cause serious ecological and environmental | problems such as the greenhouse effect, photochemical smog, and ozone layer destruction. . In recent years, with the development of industry, the release of man-made | VOCs has increased dramatically. At present, the VOCs control technology applied in | industry mainly includes regenerative thermal combustion (RTO), regenerative | catalytic oxidation (RCO), condensation, adsorption, adsorption, plasma catalysis, | photocatalytic oxidation, ozone catalytic oxidation, membrane separation, biodegradation, and so on. Each of the above technologies has advantages and | disadvantages; for example, RTO is suitable for the treatment of high-concentration | VOCs exhaust gas, which requires additional energy to process low-concentration | VOCs exhaust gas, which in turn increases operating costs; although RCO technology | has low requirements for operating temperature, the processing efficiency is greatly | affected by the fluctuation of intake air volume and VOCs concentration, and further, | the catalyst also needs to be replaced regularly and pretreatment facilities are required | in order to prevent catalyst poisoning, so that the operation and operation costs are | high; the condensation technology is mainly suitable for the treatment of | high-concentration VOCs with a concentration of over 5000 ppm; the adsorption |
LU102211 | technology requires matching wastewater treatment facilities.
Thus, among the VOCs ; control technologies that have been industrially applied, the adsorption technology | occupies the main market share of VOCs control due to the stable high processing | efficiency and low operating costs.
Moreover, according to whether the recovery of ; VOCs can be achieved, the control technology can be divided into VOCs | decomposition technology and renewable technology.
Most of the VOCs in the | exhaust gas are important raw materials for industrial production and have high | economic value.
Therefore, RTO, RCO, catalytic oxidation, catalytic decomposition , and other technologies that decompose VOCs into CO; cannot achieve the recovery . and reuse of VOCs, and thus cannot achieve recycling.
In contrast, the use of | magnetic biochar adsorption control technology can not only realize the recycling of | VOCs, but also fundamentally avoids the secondary pollution of the environment | caused by by-products such as NOx, Os, OH radicals, secondary organic aerosols, etc. | generated by the decomposition of VOCs.
However, at present, there is no integrated | device for purifying and recovering VOCs based on magnetic biochar adsorption, : which restricts the application scope of purification and recovery of VOCs. | Summary of Invention |
For the above problems in the prior art, the present invention provides a device | and a method for purifying and recovering VOCs in an exhaust gas, which may | purify and recover VOCs in the exhaust gas at the same time without causing | secondary pollution to the environment, thereby effectively improving the application | range of VOCs purification and recovery. |
To achieve the above purpose, the technical solutions adopted by the present | invention are as below: a device and a method for purifying and recovering VOCs in | an exhaust gas, including an adsorption reactor, an adsorbent regeneration system, a | VOCs collection system, a fluidized-bed inner tank, an ash hopper, a partition plate, a ; three-way control valve, an inlet duct, a first outlet duct and a second outlet duct; ;
the fluidized-bed inner tank is disposed inside the adsorption reactor, and a lower |
LU102211 | end of the fluidized-bed inner tank is provided with an inlet end; one end of the inlet ; duct extends into the adsorption reactor and is connected to the inlet end, and the | fluidized-bed inner tank is provided inside with a support layer, which is provided | with a magnetic biochar adsorbent; an upper end of the fluidized-bed inner tank is Ë provided with an outlet end, an inverted V-shaped baffle is disposed directly above the | outlet end, and an upper end of the adsorption reactor is provided with a first air outlet | and a second air outlet side by side; the partition plate is located inside the adsorption | reactor and is vertically fixed between the first air outlet and the second air outlet, a À first electromagnet is disposed in the adsorption reactor near the first air outlet, and a | second electromagnet is disposed in the adsorption reactor near the second air outlet; À one end of the first outlet duct and one end of the second outlet duct are respectively ‘ connected to the first air outlet and the second air outlet, and the other end of the first | outlet duct and the other end of the second outlet duct are respectively connected to | two inlets of the three-way control valve; a discharge port at a lower end of the , adsorption reactor is connected with a feed port at an upper end of the ash hopper, a ; lower end of the ash hopper is provided with the discharge port, and an airlock is | mounted at the discharge port. :
The adsorbent regeneration system includes an adsorbent regenerator, an electric | heating system, a purge fan, an adsorbent conveyor and an adsorbent conveying pipe; | a top portion of the adsorbent regenerator is provided with a feed inlet and the air | outlet, and a lower portion of the adsorbent regenerator is provided with a blowing | port and the discharge port; the electric heating system is disposed inside the | adsorbent regenerator, and the feed inlet of the adsorbent regenerator is connected to a | feed outlet of the ash hopper; the purge fan is connected to the blowing port of the | adsorbent regenerator through a pipeline, and the discharge port of the adsorbent | regenerator is connected to the inlet end of the adsorbent conveyor through the | pipeline; the outlet end of the adsorbent conveyor is connected to one end of the | adsorbent conveying pipe, a feeding port is opened on a side of the fluidized-bed | inner tank, and the other end of the adsorbent conveying pipe extends into the |
BL-5170 4 | LU102211 | adsorption reactor to be connected to the feeding port of the fluidized bed inner tank; ; through the provision of the system, the magnetic biochar adsorbent that has adsorbed | VOCs may be gasified and desorbed, so that the magnetic biochar adsorbent may : adsorb VOCs again, thereby realizing recycling and effectively saving resources. : The VOCs collection system includes a connecting duct, a VOCs collection tank :
and a VOCs condenser duct; one end of the connecting duct is connected to the air | outlet of the adsorbent regenerator, and the other end of the connecting duct is | connected to the air inlet of the VOCs collection tank; one end of the VOCs condenser : duct extends into the inlet duct, and the other end of the VOCs condenser duct is Ë connected to a return port of the VOCs collection tank.
Through the provision of the À system, the desorbed VOCs may be collected, so as to facilitate the subsequent reuse | of VOCs. ' Further, the support layer is a stainless steel porous plate.
With this structure, it | has the function of air distribution, ensuring the passage of the exhaust gas and . preventing the passage of magnetic biochar adsorbent, thereby ensuring the | purification of VOCs in the exhaust gas while having the advantages of convenient ; processing and low cost. ; Further, a surface of the adsorption reactor is provided with an inspection port, | and the inspection port is sealed by an inspection door.
Through the provision of the | inspection port, the adsorption reactor and the fluidized-bed inner tank may be | overhauled regularly to ensure the normal use of the entire device. | A working method for a device for purifying and recovering VOCs in an exhaust | gas includes specifically steps of: | A, transporting the exhaust gas containing VOCs to the fluidized-bed inner tank | through the inlet duct, the exhaust gas containing VOCs flowing from bottom to top | inside the fluidized-bed inner tank, the magnetic biochar adsorbent being in a | fluidized state with the flow of the exhaust gas when the exhaust gas containing | VOCs passing through the support layer, the magnetic biochar adsorbent adsorbing |
BL-5170 5 | LU102211 | VOC in the exhaust gas, and the exhaust gas carrying the magnetic biochar adsorbent | that has adsorbed VOCs to be discharged from the outlet end of the fluidized-bed ; inner tank after purification; | B, the discharged exhaust gas being blocked by the inverted V-shaped baffle and | guided to the lower portion of the adsorption reactor while the magnetic biochar Ë adsorbent carried in the exhaust gas hitting the inverted V-shaped baffle under the . action of inertia and rebounding to move to the lower portion of the adsorption reactor, | the purified exhaust gas continuing to move to the upper portion of the adsorption . reactor after passing through the inverted V-shaped baffle, and most of the magnetic | biochar adsorbent continuing to fall in the adsorption reactor by the rebound force and . gravity until reaching the ash hopper; the remaining small part of the magnetic , biochar adsorbent moving with the exhaust gas to the upper portion of the adsorption | reactor, and controlling the three-way control valve, the first electromagnet and the À second electromagnet, which specifically includes: f D first turning on the first electromagnet, turning off the second electromagnet, | and then adjusting the three-way control valve so that the air outlet is connected to the | first outlet duct while being disconnected from the second outlet duct; the exhaust gas À entering the first outlet duct from the first air outlet of the adsorption reactor, the first | electromagnet capturing the magnetic biochar adsorbent in the exhaust gas when the | exhaust gas passing through the first air outlet, and finally discharging the purified | exhaust gas from the air outlet of the three-way control valve; | ©) after a set time (at this time, the magnetic biochar adsorbent adsorbed by the | first electromagnet reaches a certain amount), turning on the second electromagnet, | and then adjusting the three-way control valve so that the air outlet is connected to the | second outlet duct while being disconnected from the first outlet duct, finally turning | off the first electromagnet; the magnetic biochar adsorbent captured by the first | electromagnet falling into the ash hopper by gravity, then the exhaust gas entering the | second outlet duct from the second air outlet of the adsorption reactor, the second | electromagnet capturing the magnetic biochar adsorbent in the exhaust gas when the |
LU102211 | exhaust gas passing through the second air outlet, and finally discharging the purified | exhaust gas from the air outlet of the three-way control valve; |
© after a set time (at this time, the magnetic biochar adsorbent adsorbed by the | second electromagnet reaches a certain amount), repeating the step (D while the | magnetic biochar adsorbent captured by the second electromagnet falling into the ash . hopper by gravity, in repeating in this way until the process of purifying VOCs in the : exhaust gas is completed; this alternate operation may continuously maintain the . capturing capabilities of the first electromagnet and the second electromagnet;
C, during the process of purifying VOCs in the exhaust gas, the magnetic biochar | adsorbent in the ash hopper entering the adsorbent regenerator through the air lock, , then turning on the electric heating system to heat the inside of the adsorbent : regenerator, the magnetic biochar adsorbent that has adsorbed VOCs vaporizing and ; desorbing VOCs at high temperatures, the desorbed magnetic biochar adsorbent | reaching the lower portion of the adsorbent regenerator by gravity and entering the | adsorbent conveying pipe through the discharge port of the adsorbent regenerator and | the adsorbent conveyor to finally enter into the fluidized-bed inner tank through the | feeding port and be placed on the support layer, so as to complete the regeneration . process of the magnetic biochar adsorbent; |
D, turning on the purge fan to make a VOCs vapor generated by gasification and | desorption in the adsorbent regenerator enter the VOCs collection tank through the | connecting duct under the action of air pressure, and the VOCs vapor flowing in the | VOCs collection tank into the VOCs condenser duct, wherein since the VOCs | condenser duct is in the inlet duct, the VOCs vapor exchanges heat between the VOCs | condenser duct and the exhaust gas containing VOCs in the inlet duct so that most of | the VOCs vapor is condensed and liquefied, then the liquefied VOCs liquid flowing | back into the VOCs collection tank through the VOCs condenser duct for collection, a | small part of the uncondensed and liquefied VOCs vapor entering the inlet duct from à the VOCs condenser duct and entering the adsorption reactor with the exhaust gas | containing VOCs for the purification process again, and then repeating in this way |
BL-5170 7 | LU102211 | until the process of purifying VOCs in the exhaust gas is completed. À Compared with the prior art, in the present invention, with the combination of | the adsorption reactor, the adsorbent regeneration system and the VOCs collection | system, the exhaust gas containing VOCs is purified through the adsorption reactor, so : that the exhaust gas does not contain VOCs before being discharged; the adsorbent . regeneration system can vaporize and desorb a magnetic biochar adsorbent that has ; adsorbed VOCs, so that the magnetic biochar adsorbent has the adsorption capacity | for VOCs again to realizes reuse; the VOCs collection system can condense and . liquefy the desorbed VOCs vapor to realize the collection of VOCs; therefore, the ; present invention can purify and recover VOCs in the exhaust gas at the same time | without causing secondary pollution to the environment, thereby effectively ! improving the application range of VOCs purification and recovery. | Brief Description of Drawings .
Fig. 1 is a structural view of the disclosure. .
In figures: 1, adsorption reactor; 2, adsorbent regeneration system; 3, VOCs | collection system; 4, fluidized-bed inner tank; 5, inverted V-shaped baffle; 6, partition | plate; 7, three-way control valve; 8-1, first electromagnet; 8-2, second electromagnet; | 9, inlet duct; 10-1, first outlet duct; 10-2, second outlet duct; 11, inspection port; 12, | ash hopper; 13, magnetic biochar adsorbent; 14, support layer; 15, feeding port: 16, | airlock; 17, adsorbent regenerator; 18, adsorbent conveyor; 19, adsorbent conveying | pipe; 20, purge fan; 21, electric heating system; 22, connecting duct; 23, VOCs | collection tank; 24, VOCs condenser duct. | The disclosure will be further elaborated hereafter. | As shown in Fig. 1, a device and a method for purifying and recovering VOCs in | an exhaust gas includes an adsorption reactor 1, an adsorbent regeneration system 2, a | VOCs collection system 3, a fluidized-bed inner tank 4, an ash hopper 12, a partition |
LU102211 | plate 6, a three-way control valve 7, an inlet duct 9, a first outlet duct 10-1 and a ; second outlet duct 10-2. |
The fluidized-bed inner tank 4 is disposed inside the adsorption reactor 1, and a À lower end of the fluidized-bed inner tank 4 is provided with an inlet end; one end of | ; the inlet duct 9 extends into the adsorption reactor 1 and is connected to the inlet end, | and the fluidized-bed inner tank 4 is provided inside with a support layer 14, the : support layer 14 being provided with a magnetic biochar adsorbent 13; an upper end | of the fluidized-bed inner tank 4 is provided with an outlet end, an inverted V-shaped | baffle 5 is disposed directly above the outlet end, and an upper end of the adsorption : reactor 1 is provided with a first air outlet and a second air outlet side by side; the ; partition plate 6 is located inside the adsorption reactor 1 and is vertically fixed : between the first air outlet and the second air outlet, a first electromagnet 8-1 is | disposed in the adsorption reactor 1 near the first air outlet, and a second | electromagnet 8-2 is disposed in the adsorption reactor 1 near the second air outlet; | one end of the first outlet duct 10-1 and one end of the second outlet duct 10-2 are : respectively connected to the first air outlet and the second air outlet, and the other | end of the first outlet duct 10-1 and the other end of the second outlet duct 10-2 are | respectively connected to two inlets of the three-way control valve 7; a discharge port | at a lower end of the adsorption reactor 1 is connected with a feed port at an upper end | of the ash hopper 12, a lower end of the ash hopper 12 is provided with the discharge | port, and an airlock 16 is mounted at the discharge port. | The adsorbent regeneration system 2 includes an adsorbent regenerator 17, an ' electric heating system 21, a purge fan 20, an adsorbent conveyor 18 and an adsorbent | conveying pipe 19; a top portion of the adsorbent regenerator 17 is provided with a | feed inlet and the air outlet, and a lower portion of the adsorbent regenerator 17 is | provided with a blowing port and the discharge port; the electric heating system 21 is | disposed inside the adsorbent regenerator 17, and the feed inlet of the adsorbent | regenerator 17 is connected to a feed outlet of the ash hopper 12; the purge fan 20 is | connected to the blowing port of the adsorbent regenerator 17 through a pipeline, and |
BL-5170 9 LU102211 the discharge port of the adsorbent regenerator 17 is connected to the inlet end of the adsorbent conveyor 18 through the pipeline; the outlet end of the adsorbent conveyor 18 is connected to one end of the adsorbent conveying pipe 19, a feeding port 15 is opened on a side of the fluidized-bed inner tank 4, and the other end of the adsorbent conveying pipe 19 extends into the adsorption reactor 1 to be connected to the feeding | port 15 of the fluidized bed inner tank 4. Through the provision of the system, the | magnetic biochar adsorbent 13 that has adsorbed VOCs may be gasified and desorbed, | so that the magnetic biochar adsorbent 13 may adsorb VOCs again, thereby realizing | recycling and effectively saving resources. | The VOCs collection system 3 includes a connecting duct 22, a VOCs collection | tank 23 and a VOCs condenser duct 24; one end of the connecting duct 22 is | connected to the air outlet of the adsorbent regenerator 17, and the other end of the | connecting duct 22 is connected to the air inlet of the VOCs collection tank 23; one | end of the VOCs condenser duct 24 extends into the inlet duct 9, and the other end of | the VOCs condenser duct 24 is connected to a return port of the VOCs collection tank {
23. Through the provision of the system, the desorbed VOCs may be collected, so as | to facilitate the subsequent reuse of VOCs.
Further, the support layer 14 is a stainless steel porous plate. With this structure, it has the function of air distribution, ensuring the passage of the exhaust gas and preventing the passage of magnetic biochar adsorbent 13, thereby ensuring the purification of VOCs in the exhaust gas while having the advantages of convenient processing and low cost.
Further, a surface of the adsorption reactor 1 is provided with an inspection port 11, and the inspection port 11 is sealed by an inspection door. Through the provision of the inspection port 11, the adsorption reactor 1 and the fluidized-bed inner tank 4 may be overhauled regularly to ensure the normal use of the entire device.
A working method for a device for purifying and recovering VOCs in an exhaust gas includes specifically steps of:
LU102211 |
A, transporting the exhaust gas containing VOCs to the fluidized-bed inner tank |
4 through the inlet duct 9, the exhaust gas containing VOCs flowing from bottom to | top inside the fluidized-bed inner tank 4, the magnetic biochar adsorbent 13 being in a | fluidized state with the flow of the exhaust gas when the exhaust gas containing . VOCs passing through the support layer 14, the magnetic biochar adsorbent 13 | adsorbing VOC in the exhaust gas, and the exhaust gas carrying the magnetic biochar | adsorbent 13 that has adsorbed VOCs to be discharged from the outlet end of the | fluidized-bed inner tank 4 after purification; | B, the discharged exhaust gas being blocked by the inverted V-shaped baffle 5 | and guided to the lower portion of the adsorption reactor 1 while the magnetic biochar | adsorbent 13 carried in the exhaust gas hitting the inverted V-shaped baffle 5 under | the action of inertia and rebounding to move to the lower portion of the adsorption | reactor 1, the purified exhaust gas continuing to move to the upper portion of the | adsorption reactor 1 after passing through the inverted V-shaped baffle 5, and most of | the magnetic biochar adsorbent 5 continuing to fall in the adsorption reactor 1 by the | rebound force and gravity until reaching the ash hopper 12; the remaining small part . of the magnetic biochar adsorbent 13 moving with the exhaust gas to the upper | portion of the adsorption reactor 1, and controlling the three-way control valve 7, the | first electromagnet 8-1 and the second electromagnet 8-2, which specifically includes: . (D first turning on the first electromagnet 8-1, turning off the second . electromagnet 8-2, and then adjusting the three-way control valve 7 so that the air | outlet is connected to the first outlet duct 10-1 while being disconnected from the | second outlet duct 10-2; the exhaust gas entering the first outlet duct 10-1 from the | first air outlet of the adsorption reactor 1, the first electromagnet 8-1 capturing the | magnetic biochar adsorbent 13 in the exhaust gas when the exhaust gas passing | through the first air outlet, and finally discharging the purified exhaust gas from the | air outlet of the three-way control valve 7; ; © after a set time (at this time, the magnetic biochar adsorbent 13 adsorbed by | the first electromagnet 8-1 reaches a certain amount), turning on the second |
Luto2211 | electromagnet 8-2, and then adjusting the three-way control valve 7 so that the air | outlet is connected to the second outlet duct 10-2 while being disconnected from the | first outlet duct 10-1, finally turning off the first electromagnet 8-1; the magnetic | biochar adsorbent 13 captured by the first electromagnet 8-1 falling into the ash | hopper 12 by gravity, then the exhaust gas entering the second outlet duct 10-2 from | the second air outlet of the adsorption reactor 1, the second electromagnet 8-2 ; capturing the magnetic biochar adsorbent 13 in the exhaust gas when the exhaust gas | passing through the second air outlet, and finally discharging the purified exhaust gas | from the air outlet of the three-way control valve 7; |
© after a set time (at this time, the magnetic biochar adsorbent 13 adsorbed by Ë the second electromagnet 8-2 reaches a certain amount), repeating the step © while : the magnetic biochar adsorbent 13 captured by the second electromagnet 8-2 falling ; into the ash hopper 12 by gravity, in repeating in this way until the process of | purifying VOCs in the exhaust gas is completed; this alternate operation may Ë continuously maintain the capturing capabilities of the first electromagnet 8-1 and the | second electromagnet 8-2; '
C, during the process of purifying VOCs in the exhaust gas, the magnetic biochar | adsorbent 13 in the ash hopper 12 entering the adsorbent regenerator 17 through the | air lock 16, then turning on the electric heating system 21 to heat the inside of the | adsorbent regenerator 17, the magnetic biochar adsorbent that has adsorbed VOCs | vaporizing and desorbing VOCs at high temperatures, the desorbed magnetic biochar | adsorbent reaching the lower portion of the adsorbent regenerator 17 by gravity and | entering the adsorbent conveying pipe 19 through the discharge port of the adsorbent | regenerator 17 and the adsorbent conveyor 18 to finally enter into the fluidized-bed | inner tank 4 through the feeding port 15 and be placed on the support layer 14, so as | to complete the regeneration process of the magnetic biochar adsorbent 13; |
D, turning on the purge fan 20 to make a VOCs vapor generated by gasification | and desorption in the adsorbent regenerator 17 enter the VOCs collection tank 23 | through the connecting pipe 22 under the action of air pressure, and the VOCs vapor |
LU102211 | flowing in the VOCs collection tank 23 into the VOCs condenser duct 24, wherein | since the VOCs condenser duct 24 is in the inlet duct 9, the VOCs vapor exchanges . heat between the VOCs condenser duct 24 and the exhaust gas containing VOCs in | the inlet duct 9 so that most of the VOCs vapor is condensed and liquefied, then the | liquefied VOCs liquid flowing back into the VOCs collection tank 23 through the | VOCs condenser duct 24 for collection, a small part of the uncondensed and liquefied | VOCs vapor entering the inlet duct 9 from the VOCs condenser duct 24 and entering | the adsorption reactor 1 with the exhaust gas containing VOCs for the purification | process again, and then repeating in this way until the process of purifying VOCs in | the exhaust gas is completed. |

Claims (4)

LU102211 |
1. A device and a method for purifying and recovering VOCs in an exhaust gas, | including an adsorption reactor, an adsorbent regeneration system, a VOCs collection . system, a fluidized-bed inner tank, an ash hopper, a partition plate, a three-way | control valve, an inlet duct, a first outlet duct and a second outlet duct; | the fluidized-bed inner tank is disposed inside the adsorption reactor, and a lower i end of the fluidized-bed inner tank is provided with an inlet end; one end of the inlet | duct extends into the adsorption reactor and is connected to the inlet end, and the | fluidized-bed inner tank is provided inside with a support layer, which is provided . with a magnetic biochar adsorbent; an upper end of the fluidized-bed inner tank is | provided with an outlet end, an inverted V-shaped baffle is disposed directly above the | outlet end, and an upper end of the adsorption reactor is provided with a first air outlet | and a second air outlet side by side; the partition plate is located inside the adsorption | reactor and is vertically fixed between the first air outlet and the second air outlet, a | first electromagnet is disposed in the adsorption reactor near the first air outlet, and a | second electromagnet is disposed in the adsorption reactor near the second air outlet; | one end of the first outlet duct and one end of the second outlet duct are respectively | connected to the first air outlet and the second air outlet, and the other end of the first | outlet duct and the other end of the second outlet duct are respectively connected to | two inlets of the three-way control valve; a discharge port at a lower end of the | adsorption reactor is connected with a feed port at an upper end of the ash hopper, a | lower end of the ash hopper is provided with the discharge port, and an airlock is mounted at the discharge port; | the adsorbent regeneration system includes an adsorbent regenerator, an electric | heating system, a purge fan, an adsorbent conveyor and an adsorbent conveying pipe; | a top portion of the adsorbent regenerator is provided with a feed inlet and the air | outlet, and a lower portion of the adsorbent regenerator is provided with a blowing . port and the discharge port; the electric heating system is disposed inside the | adsorbent regenerator, and the feed inlet of the adsorbent regenerator is connected to a |
LU102211 | feed outlet of the ash hopper; the purge fan is connected to the blowing port of the | adsorbent regenerator through a pipeline, and the discharge port of the adsorbent | regenerator is connected to the inlet end of the adsorbent conveyor through the | pipeline; the outlet end of the adsorbent conveyor is connected to one end of the ; adsorbent conveying pipe, a feeding port is opened on a side of the fluidized-bed ; inner tank, and the other end of the adsorbent conveying pipe extends into the | adsorption reactor to be connected to the feeding port of the fluidized bed inner tank; | the VOCs collection system includes a connecting duct, a VOCs collection tank | and a VOCs condenser duct; one end of the connecting duct is connected to the air | outlet of the adsorbent regenerator, and the other end of the connecting duct is | connected to the air inlet of the VOCs collection tank; one end of the VOCs condenser . duct extends into the inlet duct, and the other end of the VOCs condenser duct is | connected to a return port of the VOCs collection tank. |
2. The device and a method for purifying and recovering VOCs in an exhaust gas | according to claim 1, the support layer is a stainless steel porous plate. |
3. The device and a method for purifying and recovering VOCs in an exhaust gas | according to claim I, a surface of the adsorption reactor is provided with an | inspection port, and the inspection port is sealed by an inspection door. |
4. A working method using the device for purifying and recovering VOCs in an | exhaust gas according to any one of claims 1 to 3, includes specifically steps of: | A, transporting the exhaust gas containing VOCs to the fluidized-bed inner tank | through the inlet duct, the exhaust gas containing VOCs flowing from bottom to top | inside the fluidized-bed inner tank, the magnetic biochar adsorbent being in a | fluidized state with the flow of the exhaust gas when the exhaust gas containing | VOCs passing through the support layer, the magnetic biochar adsorbent adsorbing . VOC in the exhaust gas, and the exhaust gas carrying the magnetic biochar adsorbent . that has adsorbed VOCs to be discharged from the outlet end of the fluidized-bed | inner tank after purification; ;
BL-5170 15 | LU102211 |
B, the discharged exhaust gas being blocked by the inverted V-shaped baffle and | guided to the lower portion of the adsorption reactor while the magnetic biochar ; adsorbent carried in the exhaust gas hitting the inverted V-shaped baffle under the . action of inertia and rebounding to move to the lower portion of the adsorption reactor, | the purified exhaust gas continuing to move to the upper portion of the adsorption | reactor after passing through the inverted V-shaped baffle, and most of the magnetic | biochar adsorbent continuing to fall in the adsorption reactor by the rebound force and gravity until reaching the ash hopper; the remaining small part of the magnetic | biochar adsorbent moving with the exhaust gas to the upper portion of the adsorption | reactor, and controlling the three-way control valve, the first electromagnet and the | second electromagnet, which specifically includes: | (1) first turning on the first electromagnet, turning off the second electromagnet, | and then adjusting the three-way control valve so that the air outlet is connected to the : first outlet duct while being disconnected from the second outlet duct; the exhaust gas | entering the first outlet duct from the first air outlet of the adsorption reactor, the first |; electromagnet capturing the magnetic biochar adsorbent in the exhaust gas when the | exhaust gas passing through the first air outlet, and finally discharging the purified | exhaust gas from the air outlet ofthe three-way control valve; | (2) after a set time (at this time, the magnetic biochar adsorbent adsorbed by the | first electromagnet reaches a certain amount), turning on the second electromagnet, . and then adjusting the three-way control valve so that the air outlet is connected to the | second outlet duct while being disconnected from the first outlet duct, finally turning | off the first electromagnet; the magnetic biochar adsorbent captured by the first | electromagnet falling into the ash hopper by gravity, then the exhaust gas entering the | second outlet duct from the second air outlet of the adsorption reactor, the second | electromagnet capturing the magnetic biochar adsorbent in the exhaust gas when the | exhaust gas passing through the second air outlet, and finally discharging the purified | exhaust gas from the air outlet of the three-way control valve; ’ (3) after a set time, repeating the step (1) while the magnetic biochar adsorbent | captured by the second electromagnet falling into the ash hopper by gravity, in ; repeating in this way until the process of purifying VOCs in the exhaust gas is | completed; .
C, during the process of purifying VOCs in the exhaust gas, the magnetic biochar | adsorbent in the ash hopper entering the adsorbent regenerator through the air lock, | then turning on the electric heating system to heat the inside of the adsorbent | regenerator, the magnetic biochar adsorbent that has adsorbed VOCs vaporizing and | desorbing VOCs at high temperatures, the desorbed magnetic biochar adsorbent reaching the lower portion of the adsorbent regenerator by gravity and entering the . adsorbent conveying pipe through the discharge port of the adsorbent regenerator and . the adsorbent conveyor to finally enter into the fluidized-bed inner tank through the | feeding port and be placed on the support layer, so as to complete the regeneration . process of the magnetic biochar adsorbent; | D, turning on the purge fan to make a VOCs vapor generated by gasification and | desorption in the adsorbent regenerator enter the VOCs collection tank through the . connecting duct under the action of air pressure, and the VOCs vapor flowing in the | VOCs collection tank into the VOCs condenser duct, wherein since the VOCs | condenser duct is in the inlet duct, the VOCs vapor exchanges heat between the VOCs | condenser duct and the exhaust gas containing VOCs in the inlet duct so that most of | the VOCs vapor is condensed and liquefied, then the liquefied VOCs liquid flowing | back into the VOCs collection tank through the VOCs condenser duct for collection, a | small part of the uncondensed and liquefied VOCs vapor entering the inlet duct from | the VOCs condenser duct and entering the adsorption reactor with the exhaust gas || containing VOCs for the purification process again, and then repeating in this way | until the process of purifying VOCs in the exhaust gas is completed. |
LU102211A 2020-04-23 2020-11-18 Device and method for purifying and recovering VOCs in exhaust gas LU102211B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010326776.8A CN111482053A (en) 2020-04-23 2020-04-23 Purification and recovery device and method for VOCs in waste gas

Publications (1)

Publication Number Publication Date
LU102211B1 true LU102211B1 (en) 2021-05-18

Family

ID=71790236

Family Applications (1)

Application Number Title Priority Date Filing Date
LU102211A LU102211B1 (en) 2020-04-23 2020-11-18 Device and method for purifying and recovering VOCs in exhaust gas

Country Status (2)

Country Link
CN (1) CN111482053A (en)
LU (1) LU102211B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114870567B (en) * 2022-05-24 2023-01-06 广州金鹏环保工程有限公司 Two-phase flow adsorption reactor

Also Published As

Publication number Publication date
CN111482053A (en) 2020-08-04

Similar Documents

Publication Publication Date Title
US8168126B2 (en) Apparatus for microwave induced destruction of siloxanes and hydrogen sulfide in biogas
CN103611418B (en) Joint treatment device and method for organic waste gas
CN106268308B (en) Purifying system for removing VOC (Volatile Organic Compounds) out of industrial waste gas
CN208302463U (en) A kind of VOCs exhaust gas advanced purification system
CN106731484B (en) Industrial waste gas VOC recovery method and recovery system thereof
CN212855120U (en) Emission device for purifying volatile organic compounds
CN111151094A (en) Regeneration and purification method for organic polluted waste gas
CN109701358B (en) Organic waste gas adsorption and catalytic combustion combined system and process thereof
CN112717679A (en) Organic waste gas multistage purification equipment and process integrating regenerative oxidation function
CN109078459A (en) A kind of device and technology of absorption-adsorption-desorption cycle resource utilization volatile organic gases
LU102211B1 (en) Device and method for purifying and recovering VOCs in exhaust gas
CN212575964U (en) Purification and recovery device for VOCs in waste gas
CN217549414U (en) Coking wastewater loss VOCs treatment system
CN108744762B (en) Dust removal-adsorption-desorption combined integrated device and working method thereof
CN101862547B (en) Rotary solvent recovery device and method
CN206424745U (en) A kind of high efficiency active carbon adsorbing and removing VOCs devices
CN214389500U (en) Fluidized bed organic waste gas concentration device
CN212283562U (en) Industrial volatile organic waste gas treatment system
CN212166971U (en) Zeolite runner adsorbs desorption catalytic oxidation and waste heat recovery all-in-one
CN113181741A (en) Radial adsorption fixed bed VOCs adsorption regeneration unit and system
CN211159156U (en) Styrene waste gas molecular sieve processing apparatus
CN210905541U (en) Benzoic acid tail gas environmental protection processing apparatus
CN211753845U (en) Improved generation exhaust gas desulfurization denitrification facility
CN110624360A (en) VOCs waste gas purification device, purification method and purification system
CN210874697U (en) VOCs exhaust gas purification device and purification system

Legal Events

Date Code Title Description
FG Patent granted

Effective date: 20210518