CN112058250A - Method for carrier gas assisted microwave-vacuum combined regeneration of volatile organic compound-loaded adsorbent and device for method - Google Patents
Method for carrier gas assisted microwave-vacuum combined regeneration of volatile organic compound-loaded adsorbent and device for method Download PDFInfo
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- CN112058250A CN112058250A CN202010876216.XA CN202010876216A CN112058250A CN 112058250 A CN112058250 A CN 112058250A CN 202010876216 A CN202010876216 A CN 202010876216A CN 112058250 A CN112058250 A CN 112058250A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3441—Regeneration or reactivation by electric current, ultrasound or irradiation, e.g. electromagnetic radiation such as X-rays, UV, light, microwaves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- 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
Abstract
The invention discloses a method for carrier gas assisted microwave-vacuum combined regeneration of volatile organic compound-carrying adsorbent and a device for the method. The device comprises a carrier gas supply bottle, a microwave oven, a reaction container, a vacuum pump and a tail gas absorption device; the reaction container is arranged in the microwave oven, the carrier gas supply bottle is connected with the reaction container, and two ends of the vacuum pump are respectively connected with the reaction container and the tail gas absorption device. The method comprises the following steps: the adsorbent adsorbing volatile organic compounds is regenerated by a combined process of microwave heating and vacuum desorption and the intermittent supplement of normal-temperature nitrogen. The method can improve the desorption and recovery effect, and can also well recover the adsorption performance of the adsorbent, thereby being convenient for recycling. By the technical method, the desorption regeneration efficiency of the adsorbent is improved by 9.3 percent compared with a nitrogen-free vacuum breaking treatment method and is improved by 48.3 percent compared with a common traditional heating-vacuum desorption method.
Description
Technical Field
The invention belongs to the field of atmospheric pollution control of environmental engineering, and particularly relates to a method for carrier gas assisted microwave-vacuum combined regeneration of a volatile organic compound-loaded adsorbent and a device for the method.
Background
Volatile Organic Compounds (VOCs) generally refer to organic compounds having a boiling point between 50 ℃ and 260 ℃ at normal pressure or a saturated vapor pressure of more than 71Pa at room temperature, and VOCs waste gas is generated when various organic solvents are used in the industries such as petrochemical industry, pharmacy, furniture manufacturing, paper making and printing, electronic component processing and the like. The waste gas of VOCs is one of the main factors causing air pollution, seriously harms the ecological environment and human health, and therefore, the gas needs to be recycled or destroyed.
In a plurality of waste gas treatment technologies, the adsorption process can not only thoroughly remove organic pollutants in exhaust gas, but also recover valuable organic components, and is a successful method for purifying and recovering VOCs. The adsorption material which is most widely applied at present is activated carbon which has a developed porous structure, a large specific surface area and excellent adsorption performance. After adsorbing organic matters, the activated carbon is also polluted, and due to the high treatment cost, most of the activated carbon is discarded after being used, so that secondary pollution is easily caused. Therefore, the research on the novel activated carbon regeneration technology has important environmental protection significance and economic benefit.
The thermal regeneration method is a mature process in a plurality of activated carbon regeneration methods, the traditional thermal regeneration process is carried out in external heating modes such as convection, conduction and radiation, a temperature gradient from outside to inside exists, and the removal of organic matters in the regeneration process is carried out from inside to outside, so that the energy consumption and the time consumption are large, the loss rate of the regenerated activated carbon is high, and the recovery effect of the adsorption performance is poor.
Microwave refers to electromagnetic waves in the electromagnetic spectrum between the far infrared and radio waves, with frequencies in the range of about 300MHz to 300 GHz. The microwave heating has the characteristics of internal heating, efficient heating, selective heating, automatic control and the like, can overcome the defects of the conventional heating method, reduce time consumption and energy consumption, and has good application prospect in the fields of enhanced desorption and adsorbent regeneration.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method for carrier gas assisted microwave-vacuum combined regeneration of a volatile organic compound-loaded adsorbent and a device for the method.
The invention aims to provide a method for desorbing and regenerating an adsorbent carrying Volatile Organic Compounds (VOCs) by combining microwave heating and vacuum desorption technologies and intermittently supplementing normal-temperature nitrogen for vacuum breaking treatment, which can further enhance the removal effect of the VOCs, improve the regeneration yield of the adsorbent and the recovery rate of the adsorption performance, reduce the regeneration time and save the energy consumption.
The purpose of the invention is realized by at least one of the following technical solutions.
The invention provides a method for carrier gas assisted microwave-vacuum combined regeneration of volatile organic compound-carrying adsorbent, which comprises the following steps:
(1) checking the air tightness of the experimental device, and carrying out vacuum pumping test on the reaction vessel in the microwave experimental furnace to ensure that the vacuum degree of the reaction vessel can be well maintained in the regeneration process; placing the adsorbent carrying the VOCs into a reaction container, vacuumizing, and intermittently starting microwaves to ensure that the temperature of the adsorbent carrying the VOCs is 115-130 ℃, and then performing microwave regeneration treatment in a vacuum state;
(2) the microwave is intermittently started to maintain the temperature of the adsorbent carrying the VOCs at 115-130 ℃ (the temperature of the material in the container is set in advance by a PLC control interface of the microwave equipment to be within a regeneration temperature range, and the microwave is intermittently operated to control the temperature of the material to reach the set range in the regeneration process), carrier gas is introduced into the reaction container to carry out vacuum breaking treatment, so that the normal pressure in the container is recovered;
(3) the microwave is intermittently started to maintain the temperature of the adsorbent carrying the VOCs at 115-130 ℃, the reaction container is subjected to secondary vacuum-pumping treatment, and then carrier gas is introduced for vacuum-breaking treatment;
(4) and (4) the process in the step (3) is circulated, the desorption treatment is completed, and the normal pressure is recovered to obtain the desorbed adsorbent.
Further, in the step (1), after vacuumizing, the vacuum degree of the reaction container is-0.040 to-0.1 Mpa; the time of the microwave regeneration treatment is 2.5-6 min.
Preferably, the microwave regeneration treatment time in the step (1) is 4.5 min.
Preferably, the power of the microwave is set to 120W. The frequency of the microwave is 300MHz-300 GHz.
Further, the carrier gas in the step (2) is a gas which does not chemically react with the adsorbent or adsorbate; the carrier gas is nitrogen or inert gas.
Further, the time of the vacuum breaking treatment in the step (2) is 0.5 min.
Further, the time of the second vacuumizing treatment in the step (3) is 2.5-5.5 min; after the second vacuum-pumping treatment, the vacuum degree of the reaction container is-0.040 to-0.1 Mpa.
Preferably, the time of the second vacuum treatment in the step (3) is 2.5min, 3.5min, 4.5min or 5.5 min.
Further, the time of the vacuum breaking treatment in the step (3) is 0.5 min; after the vacuum breaking treatment, the pressure of the reaction vessel is normal pressure. The time for recovering the normal pressure by vacuum relief can be adjusted according to actual equipment.
Further, the number of the circulation of the step (4) is 10-20.
Preferably, the number of cycles of step (4) is 10, 12, 15 or 20.
Further, VOCs produced during the treatment process are passed to a tail gas absorber and then evacuated.
The invention provides a device for the carrier gas assisted microwave-vacuum combined regeneration method of volatile organic compound-carrying adsorbent, which comprises a carrier gas supply bottle, a microwave oven, a reaction container, a vacuum pump and a tail gas absorption device; the reaction container is arranged in a microwave oven, the carrier gas supply bottle is connected with the reaction container, one end of the vacuum pump is connected with the reaction container, and the other end of the vacuum pump is connected with the tail gas absorption device.
Furthermore, an embedded thermocouple is arranged in the microwave oven and inserted into the middle of the adsorbent bed for bed temperature measurement; the microwave oven is provided with a safety alarm device, the oven door needs to be closed before the microwave is started, and when the oven door is not tightly closed, the experimental oven starts to alarm and simultaneously closes the microwave.
The device provided by the invention is a regeneration device which utilizes microwave heating and vacuum desorption and simultaneously intermittently introduces nitrogen to carry out vacuum breaking treatment.
Preferably, the device for the nitrogen-assisted microwave-vacuum combined regeneration method of the volatile organic compound-loaded adsorbent comprises a nitrogen generating source, a microwave high-temperature experimental furnace, a reaction vessel, a quartz tube reactor, a three-way ball valve, a vacuum pump and a tail gas absorption device.
Furthermore, the microwave high-temperature experimental furnace adopted by the device has the advantages that the microwave output power and the microwave opening and closing time can be controlled in a manual mode and an automatic mode, and a regeneration reactor (reaction container) used for containing the adsorbent in the experimental furnace is a quartz glass tube, can be well penetrated by microwaves and is high-temperature resistant. The quartz tube is fixed by a metal part, the upper end of the quartz tube is tightly attached to the metal top cover by a sealing ring and then is screwed by a buckle. Preferably, the microwave high-temperature experimental furnace is provided with an embedded armored K-type thermocouple, the position of the thermocouple can be adjusted through a nut, the thermocouple is inserted into the middle of the adsorbent bed layer and used for measuring the temperature of the bed layer, and the real-time temperature and the period of recording the temperature can be displayed and set through a PLC control interface respectively.
Furthermore, the three-way ball valve is used for switching gas paths, when the regeneration reactor needs to be vacuumized, the vacuumized gas path is communicated with the regeneration reactor by adjusting the ball valve, and the nitrogen gas path is not communicated at the moment; when the reactor needs to be subjected to vacuum breaking treatment by introducing nitrogen, the ball valve is adjusted in the opposite direction, so that the nitrogen gas path is the same as the regeneration reactor, and the vacuumizing gas path is not communicated.
Preferably, the vacuum pump is a dry high-temperature-resistant vacuum pump, and during the desorption process, it is preferable to start the vacuum pump first and then start the microwave for safety reasons. The extracted mixed gas is treated by a tail gas absorption device, and an absorption bottle can contain organic solvent or other absorbent.
The method provided by the invention comprises the steps of putting the adsorbent carrying the VOCs into a reaction container, firstly starting a vacuum pump to vacuumize, then starting microwaves, switching to a nitrogen gas circuit at certain intervals in the desorption process, introducing nitrogen at a certain speed (the speed cannot be too high) to break vacuum of the reactor, recovering to normal pressure, then circularly vacuumizing again, and finally introducing nitrogen to relieve pressure to finish the desorption regeneration process. And (4) the desorbed high-concentration VOCs enter a tail gas absorption device for treatment and then are discharged.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention combines the vacuum technology and the microwave technology, can realize the rapid and efficient regeneration of the adsorbent under the lower vacuum degree and the lower microwave power, and reduces the operation energy consumption and the cost;
(2) the invention utilizes nitrogen gas to carry out vacuum breaking treatment, increases the gas flow in the reactor, solves the problem of large vacuum desorption resistance, has certain sweeping effect on the adsorbent, can further strengthen the desorption effect compared with the operation mode without vacuum breaking treatment, and is beneficial to the recovery of subsequent organic components and the regeneration of the adsorbent; and nitrogen or inert gas is used as carrier gas, so that the safety of a regeneration system can be effectively guaranteed.
(3) According to the method provided by the invention, the regenerated adsorbent can better recover the adsorption performance of the adsorbent, and the difference of the adsorbent and the original carbon is small; the adsorbent after repeated adsorption and desorption regeneration has low loss and better retention of adsorption capacity.
(4) The device has simple structure, does not cause secondary pollution, and can be expanded, engineered and produced according to actual conditions in subsequent application.
Drawings
FIG. 1 is a schematic diagram of an apparatus for a carrier gas assisted microwave-vacuum combined method for regeneration of a VOC adsorbent according to an embodiment of the present invention;
wherein, the nitrogen gas supply source 1; a microwave oven 2; a furnace door 3; a reaction vessel 4; a temperature thermocouple 5; a vacuum gauge 6; a three-way ball valve 7; a PLC control panel 8; a vacuum pump 9 and a tail gas absorption device 10.
FIG. 2 is a scanning electron micrograph of the activated carbon subjected to adsorption treatment.
FIG. 3 is a scanning electron micrograph of activated carbon treated by a carrier gas assisted microwave-vacuum combined regeneration method of volatile organic compound-loaded adsorbent.
FIG. 4 is a scanning electron micrograph of a conventional activated carbon regenerated by heating and vacuum desorption.
Detailed Description
The following examples are presented to further illustrate the practice of the invention, but the practice and protection of the invention is not limited thereto. It is noted that the processes described below, if not specifically described in detail, are all realizable or understandable by those skilled in the art with reference to the prior art. The reagents or apparatus used are not indicated to the manufacturer, and are considered to be conventional products available by commercial purchase.
Example 1
As shown in fig. 1, includes: a nitrogen gas supply source 1; a microwave oven 2; a reaction vessel 4; a three-way ball valve 7; a vacuum pump 9; a tail gas absorption device 10.
The nitrogen gas supply source 1 is connected with a three-way ball valve 7, the reaction container 4 is connected with the three-way ball valve 7, one end of a vacuum pump 9 is connected with the three-way ball valve 7, and the other end of the vacuum pump 9 is connected with a tail gas absorption device 10. The reaction vessel 4 is arranged in the microwave oven 2, the temperature thermocouple 5 is arranged in the microwave oven 2, one end of the temperature thermocouple 5 is inserted into the adsorbent at the bottom of the reaction vessel 4, the position of the temperature thermocouple 5 can be adjusted through a nut and is inserted into the middle of the adsorbent bed layer for bed layer temperature measurement, and the period of real-time temperature and recorded temperature can be displayed and set through the PLC control panel 8 respectively. And a vacuum meter 6 is arranged on a pipeline for communicating the three-way ball valve 7 with the reaction container 4. The microwave oven 2 is provided with an oven door 3. The microwave oven 2 is a microwave experimental high-temperature oven, and the production company is MKG-M1UB, a Miwei microwave equipment Co. The reaction vessel 4 is a quartz tube. The VOCs produced during the treatment process are passed to the tail gas absorber 10 and then evacuated.
The three-way ball valve 7 is used for switching gas paths, when the regeneration reactor needs to be vacuumized, the vacuumized gas path is communicated with the regeneration reactor by adjusting the ball valve, and at the moment, the nitrogen gas path is not communicated; when the reactor needs to be subjected to vacuum breaking treatment by introducing nitrogen, the ball valve is adjusted in the opposite direction, so that the nitrogen gas path is the same as the regeneration reactor, and the vacuumizing gas path is not communicated.
The microwave oven 2 adopted by the device is a microwave high-temperature experimental oven, and has two modes of manual control and automatic control of microwave output power and microwave opening and closing time, and a regeneration reactor (reaction container) used for containing the adsorbent in the experimental oven is a quartz glass tube, can well transmit microwaves and is high-temperature resistant. The quartz tube is fixed by a metal part, the upper end of the quartz tube is tightly attached to the metal top cover by a sealing ring and then is screwed by a buckle. Preferably, the microwave high-temperature experimental furnace is provided with an embedded armored K-type thermocouple, the position of the thermocouple can be adjusted through a nut, the thermocouple is inserted into the middle of the adsorbent bed layer and used for measuring the temperature of the bed layer, and the real-time temperature and the period of recording the temperature can be displayed and set through a PLC control interface respectively.
Example 2
The apparatus used in the carrier gas assisted microwave-vacuum combined regeneration method of volatile organic compound-loaded adsorbent of example 2 can be referred to fig. 1.
Taking activated carbon as an example, the dosage of the activated carbon as an adsorbent is 8 g. Taking volatile oil gas of gasoline as target VOCs, the inlet gas concentration of the gasoline oil gas is 50mg/L, adsorbing at normal temperature and normal pressure, stopping adsorption until the adsorption rate reaches 30%, taking out and weighing, wherein the weight of the activated carbon is 10.4g, the scanning electron microscope image of the activated carbon is shown in figure 2, and then putting the activated carbon into a quartz tube reactor of a microwave experimental furnace.
The microwave output power is set to be 120W, the frequency of the microwave is 2450MHz, the opening and closing time of the microwave is controlled in a manual mode, the microwave radiation is carried out on the materials intermittently, and the temperature of the regeneration environment is controlled to be between 115 ℃ and 130 ℃.
When the desorption experiment is started, the vacuum pump is started to vacuumize the quartz tube reactor (after the vacuum pumping, the vacuum degree of the container is-0.080 Mpa), the microwave switch is started intermittently, the temperature during the active carbon period is maintained between 115 ℃ and 130 ℃, and the first vacuum pumping treatment (microwave regeneration treatment) is carried out for 4.5 min.
And (3) vacuumizing for 4.5 minutes every time in the desorption process, then adjusting a ball valve, switching to a gas path for introducing nitrogen, introducing the nitrogen into the quartz tube, recovering the normal pressure in the quartz tube, maintaining the vacuum breaking process for 0.5min, then vacuumizing again, and circulating the above operation processes.
The maintaining time of the whole desorption process is 60min, the cycle times are 12 times in total, and finally the nitrogen is used for vacuum relief to recover the normal pressure, thus finishing the desorption.
The desorbed activated carbon was taken out and weighed, where the weight of the activated carbon was about 8.16g, and the desorption rate was calculated to be about 93.33%. The scanning electron microscope image of the regenerated activated carbon is shown in the attached figure 3, compared with the attached figure 2, the activated carbon shown in the attached figure 3 has a clear skeleton, ordered pore structure arrangement and clean pores, and the method can be used for removing a large amount of VOCs molecules and other impurities adsorbed by the activated carbon. As can be seen from FIG. 4, the method has a small influence on the specific surface property parameters of the activated carbon, so that the adsorption capacity of the raw carbon can be well restored and maintained.
TABLE 1
The raw carbon in table 1 represents activated carbon without any treatment; the regenerated carbon is the desorbed activated carbon obtained by adsorption treatment and then treatment by the carrier gas assisted microwave-vacuum combined regeneration method of the volatile organic compound-loaded adsorbent provided by the embodiment.
As shown in table 1, the specific surface area and the specific surface area of the micropores of the activated carbon regenerated in example 2 are slightly smaller than those of the original carbon, the specific surface area of the mesopores is slightly increased, the tolerance of the total pores is very small, and the average pore diameter is slightly increased, which is beneficial to the macromolecule organic matters entering the pore channels of the adsorbent.
Example 3
The desorption conditions of the embodiment 2 are changed into microwave heating-vacuum desorption, namely, no nitrogen is introduced to break the vacuum treatment operation, other operations and conditions are not changed, the vacuum degree state of the whole desorption process is maintained at-0.080 Mpa, the maintaining time of the desorption process is 60min, the desorbed activated carbon is taken out and weighed after microwave-vacuum regeneration treatment, the weight of the activated carbon is 8.35g, the desorption rate is calculated to be about 85.42%, and comparison with the desorption rate of the embodiment 1 shows that the nitrogen breaking vacuum has the effect of improving the desorption effect, so that the adsorbate can be desorbed more thoroughly.
Example 3
The desorption conditions of the example 2 are changed into only the traditional heating-vacuum desorption (the heating mode is changed into the electric heating temperature is set to be 120 ℃), the nitrogen is not introduced to break the vacuum treatment, other operations and conditions are unchanged, the vacuum degree state in the whole desorption process is maintained at-0.080 Mpa, the maintenance time in the desorption process is 60min, after microwave-vacuum regeneration treatment, the desorbed activated carbon is taken out and weighed, the weight of the activated carbon is about 8.89g, the desorption rate is about 62.92 percent by calculation, a scanning electron microscope image of the regenerated activated carbon is shown in figure 4, the conventional heating-vacuum regeneration has a certain effect as compared with fig. 2, but by comparing fig. 2, 3 and 4, the mode has larger damage degree to the pore structure of the active carbon, has hole expansion phenomenon, is not beneficial to subsequent adsorption, and more white crystalline material in the pores indicates that more adsorbate molecules remain attached to the pores of the carbon.
The above examples are only preferred embodiments of the present invention, which are intended to be illustrative and not limiting, and those skilled in the art should understand that they can make various changes, substitutions and alterations without departing from the spirit and scope of the invention.
Claims (10)
1. A method for carrier gas assisted microwave-vacuum combined regeneration of volatile organic compound-loaded adsorbent is characterized by comprising the following steps:
(1) placing the adsorbent carrying the VOCs into a reaction container, vacuumizing, and intermittently starting microwaves to ensure that the temperature of the adsorbent carrying the VOCs is 115-130 ℃, and then performing microwave regeneration treatment in a vacuum state;
(2) intermittently starting the microwave to maintain the temperature of the adsorbent carrying the VOCs at 115-130 ℃, introducing carrier gas into the reaction container to carry out vacuum breaking treatment, and recovering the normal pressure in the container;
(3) the microwave is intermittently started to maintain the temperature of the adsorbent carrying the VOCs at 115-130 ℃, the reaction container is subjected to secondary vacuum-pumping treatment, and then carrier gas is introduced for vacuum-breaking treatment;
(4) and (4) the process in the step (3) is circulated, and the desorption treatment is completed to obtain the desorbed adsorbent.
2. The carrier gas assisted microwave-vacuum combined method for regenerating the volatile organic compound adsorbent according to the claim 1, wherein in the step (1), after the vacuum pumping, the vacuum degree of the reaction vessel is-0.040 to-0.1 Mpa; the time of the microwave regeneration treatment is 2.5-6 min.
3. The carrier gas assisted microwave-vacuum combined regeneration method for volatile organic compound-loaded adsorbent according to claim 1, wherein the carrier gas in step (2) is a gas that does not chemically react with the adsorbent or adsorbate; the carrier gas is nitrogen or inert gas.
4. The carrier gas assisted microwave-vacuum combined method for regenerating an adsorbent carrying volatile organic compounds according to claim 1, wherein the time of the vacuum breaking treatment in the step (2) is 0.5 min.
5. The carrier gas assisted microwave-vacuum combined method for regenerating an adsorbent carrying volatile organic compounds according to claim 1, wherein the time of the second vacuuming in the step (3) is 2.5-5.5 min; after the second vacuum-pumping treatment, the vacuum degree of the reaction container is-0.040 to-0.1 Mpa.
6. The carrier gas assisted microwave-vacuum combined method for regenerating an adsorbent carrying volatile organic compounds according to claim 1, wherein the time of the vacuum breaking treatment in the step (3) is 0.5 min; after the vacuum breaking treatment, the pressure of the reaction vessel is normal pressure.
7. The carrier gas assisted microwave-vacuum combined regeneration method for volatile organic compound-loaded adsorbent according to claim 1, wherein the number of cycles in step (4) is 10-20.
8. The carrier gas assisted microwave-vacuum combination volatile organic compound-bearing adsorbent regeneration method of claim 1, wherein VOCs generated during the process are passed to a tail gas absorber and then exhausted.
9. An apparatus for use in a carrier gas assisted microwave-vacuum combined method for regeneration of a volatile organic compound-loaded adsorbent according to any one of claims 1 to 8, comprising a carrier gas supply bottle, a microwave oven, a reaction vessel, a vacuum pump and a tail gas absorption device; the reaction container is arranged in a microwave oven, the carrier gas supply bottle is connected with the reaction container, one end of the vacuum pump is connected with the reaction container, and the other end of the vacuum pump is connected with the tail gas absorption device.
10. The apparatus for carrier gas assisted microwave-vacuum combined regeneration of volatile organic compound-carrying adsorbent according to claim 9, wherein the microwave oven is equipped with an embedded thermocouple inside, and the thermocouple is inserted into the middle of the adsorbent bed for bed temperature measurement; the microwave oven is provided with a safety alarm device, the oven door needs to be closed before the microwave is started, and when the oven door is not tightly closed, the experimental oven starts to alarm and simultaneously closes the microwave.
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Cited By (4)
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| CN113351192A (en) * | 2021-04-28 | 2021-09-07 | 中新国际联合研究院 | Desorption device and desorption method for oil gas recovery active carbon adsorption material |
| CN113521960A (en) * | 2021-07-30 | 2021-10-22 | 中国科学院生态环境研究中心 | Temperature and pressure cooperative collection and treatment method and device for volatile organic compounds |
| CN113797701A (en) * | 2021-09-28 | 2021-12-17 | 青岛诺诚化学品安全科技有限公司 | Activated carbon regeneration system and process method based on vacuum and microwave synergistic effect |
| CN114225926A (en) * | 2021-11-26 | 2022-03-25 | 中国辐射防护研究院 | Microwave regeneration treatment system and method for granular waste activated carbon |
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Application publication date: 20201211 |