CN114653175A - Technology and device for decomposing organic waste gas by microwave concerted catalysis - Google Patents
Technology and device for decomposing organic waste gas by microwave concerted catalysis Download PDFInfo
- Publication number
- CN114653175A CN114653175A CN202110824248.XA CN202110824248A CN114653175A CN 114653175 A CN114653175 A CN 114653175A CN 202110824248 A CN202110824248 A CN 202110824248A CN 114653175 A CN114653175 A CN 114653175A
- Authority
- CN
- China
- Prior art keywords
- waste gas
- organic waste
- microwave
- catalytic
- catalysis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
Abstract
The invention belongs to the field of organic waste gas treatment, and relates to a technology and a device for decomposing organic waste gas by microwave concerted catalysis. The PLC controls the opening and closing of the air inlet and air outlet valves to switch the direction of organic waste gas entering, so that the catalytic bin on one side can treat the organic waste gas entering from the air inlet, the catalytic bin on the other side can close the valve of the air inlet and the air outlet, the microwave generator is started, the microwave acts on the catalyst to rapidly heat the catalyst to generate an active site, and the microwave concerted catalysis and the alternate operation of the catalytic bins are realized. The treatment technology and the device realize the efficient microwave synergistic catalyst module to treat the organic waste gas, and have higher efficiency and more compact structure.
Description
Technical Field
The invention relates to a technology and a device for decomposing organic waste gas by microwave concerted catalysis.
Background
With the increase of economic growth and social productivity, energy consumption rises sharply since 21 century, coal is always compared in energy structures from 1978 to 2008 about 70%, petroleum accounts for about 20%, and natural gas water, wind and nuclear energy account for only 10% of the total. For the current energy structure of China, fossil energy still accounts for most of energy consumption structures for a long time, coal is a solid combustible mineral formed by ancient plants buried underground and undergoing complex biochemical and physicochemical changes, the coal is complex in components, besides combustible carbon and hydrogen elements, various elements such as sulfur, nitrogen, chlorine, fluorine, mercury and arsenic are also contained, and besides carbon dioxide and water, various pollutants such as sulfur dioxide, nitrogen oxides (NOx), mercury (Hg), hydrogen chloride (HCl), Volatile Organic Compounds (VOCs) and dioxin are generated by combustion, so that the ecological environment and the health of human beings are harmed. In the face of increasingly severe environmental problems, countries have increasingly strict environmental pollution control, and the cooperative removal of various pollutants has become a major trend. Especially organic volatile pollutants, have received increasing attention because of their great harm to the environment and human body. Among various pollutants generated by coal combustion, the efficient removal of VOCs has become one of the key points for the current environmental management.
In addition, the types of VOCs in living rooms are wide, and many investigations on indoor air pollutants are performed. Indoor air pollutants originate from two main sources: one is from the ingress of atmospheric contaminants outdoors, but is a source of release that exists indoors itself. The indoor pollution sources are many and complicated, and generally come from combustion products of coal, natural gas and the like, smoke generated by smoking, discharge of building materials, machine decoration materials of office facilities (such as printers, copiers and the like), furniture, household appliances, detergents and release of human activities. Therefore, the kinds of VOCs in the indoor air are various and can reach more than 900. Monitoring data show that most indoor air quality does not reach the standard, formaldehyde, benzene, ammonia and NOx are main indoor pollutants, the most serious pollutant is formaldehyde, and the exceeding standard accounts for 66.7% of the total investigation amount. On the other hand, contaminated outdoor air directly enters the room and is also an important source of indoor VOCs. Outdoor air quality surveys in Guangzhou, Nanjing, hong Kong, and Mao Ming City show that there are many kinds of VOCs in the urban atmosphere, and especially in streets, commercial districts, and industrial districts, the concentration of VOCs in many areas is relatively high. VOCs in the urban atmosphere are mainly sourced from vehicles, factories. Thus, in these areas, many types of VOCs are present in the room from the outdoor atmosphere.
Control of organic contaminant gases can be achieved in a variety of ways. In the aspect of industrial production, the most effective and reasonable method is to reduce the use and emission of organic pollutants from the source through a clean production way. However, due to the development degree of the technology in China and the limitation of each production process, it is difficult to reduce the emission of organic pollutants from the source in real clean production, so the emission of organic pollutant waste gas is inevitable, and the treatment of the waste gas from the tail end is still an essential means.
At present, the existing organic waste gas treatment technology with organized emission at home and abroad mainly comprises the following steps: physical, chemical, biological, etc. three widely different types of processing techniques. Generally, a single organic waste gas treatment can be accomplished using a single technique or a combination of two or more techniques. The common physical method is to use materials with adsorption performance such as activated carbon to carry out adsorption or water washing, but the technology has large floor area and common effect of removing organic waste gas, the adsorption materials need to be replaced after being adsorbed and saturated, the operation cost is high, and the risk of secondary pollution exists; the chemical method is chemical washing and incineration, and the technology has high treatment temperature, high energy consumption and higher requirement on treatment equipment; the biological rule comprises technologies such as biological washing, biological trickling filtration, biological filter beds and the like, and the technologies have the advantages of large occupied area, higher cost and long treatment time. In recent years, new technologies such as plasma method for removing organic waste gas and UV photolysis oxidation method have been developed, but the effect of removing organic waste gas is not significant. The above technologies have the problems of high cost, large occupied area and general treatment effect, and the removal effect of the organic waste gas with complex components is not obvious.
The microwave technology is one of the great achievements of the development of modern science and technology, and the development is extremely rapid. Microwaves have been studied extensively in the chemical field in the 80 s of the 20 th century and have achieved positive effects, such as in organic synthesis, synthesis of certain radiopharmaceuticals and drying. Recently, the research of microwave in the field of catalysis is also more and more active, and the progress made in the field of catalysis by microwave technology in recent years is introduced, such as microwave for inducing catalytic reaction and microwave for catalystPreparation of the carrier and modification of the carrier. The microwave is an electromagnetic wave including an electric field and a magnetic field, the electric field makes charged particles start to move to have a force, the polarized particles are further polarized due to the movement of the charged particles, and the direction of the associated force of the electric and magnetic parts of the microwave is rapidly changed to generate friction to raise its own temperature. This is the basic principle of microwave heating. In the microwave-induced catalytic reaction, microwave firstly acts on a catalyst or a carrier thereof to rapidly raise the temperature of the catalyst or the carrier thereof to generate active sites, and when reactants or carriers can be used for the microwave-induced catalytic reaction, only the catalyst and the carrier which can be activated by microwave can be used for the microwave-induced catalytic reaction. The main ones that can strongly interact with microwaves are ferromagnetic metals such as nickel, cobalt, iron, etc. Such as Al2O3，TiO2，ZnO，PbO，La2O3，Y2O3，ZrO2，Nb2O5And the like.
In view of the above problems, there is an urgent need to develop a technology and a device for decomposing organic waste gas by microwave-assisted catalysis, so as to solve the above problems.
Disclosure of Invention
Aiming at the existing defects, the invention provides a technology and a device which have the advantages of reliable process, reasonable layout, compact structure, capability of effectively removing organic waste gas, great improvement on the treatment efficiency of the organic waste gas, reduction in the treatment cost, realization of efficient removal of the organic waste gas and no secondary pollution.
In order to realize the purpose of the invention, the following technical scheme is provided: the utility model provides a microwave is technique and device of catalytic decomposition organic waste gas in coordination, its characterized in that includes air intake, air outlet, air intake valve, air outlet valve, catalysis storehouse, microwave generator, condensing equipment, catalyst module, temperature sensor, organic waste gas concentration sensor, PLC control system. The PLC control system is respectively connected with the temperature sensor, the organic waste gas concentration sensor, the air inlet valve, the air outlet valve and the microwave generator.
The microwave generators are uniformly distributed at the back of the catalysis bin, the microwaves enter the catalysis bin through an opening at the back of the catalysis bin, and the temperature sensor and the organic waste gas concentration sensor are arranged in the middle of the catalysis bin. The PLC control system controls the operation of the whole device, the opening and closing of the air inlet valve and the air outlet valve are controlled by the PLC to switch the entering direction of the organic waste gas, the organic waste gas entering from the air inlet is treated by the catalysis bin on one side, the valve of the air inlet and the air outlet is closed by the catalysis bin on the other side, the microwave generator is started, the microwave acts on the catalyst, the temperature of the catalyst is rapidly increased, the active point position is generated, and the microwave concerted catalysis is realized. The temperature and the time of catalysis in the catalytic bin are controlled, organic waste gas adsorbed by the catalytic decomposition catalyst is carried out, the organic waste gas on the side is decomposed by microwave concerted catalysis, when the organic waste gas concentration sensor detects that the organic waste gas in the catalytic bin on the side drops to the requirement, the PLC control valve switches the air path, the organic waste gas entering from the air inlet is processed by the catalytic bin on one side, the valve of the air inlet and the air outlet is closed by the catalytic bin on the other side, the organic waste gas adsorbed by the catalytic decomposition catalyst starts, and the operation is repeated.
The working process is as follows:
(1) the PLC controls to open an air inlet and an air outlet valve of a catalytic bin at one side, and the catalytic bin at the side treats the organic waste gas entering from the air inlet;
(2) meanwhile, the PLC controls the closing of the air inlet and the air outlet valve of the other side of the catalytic cabin, the microwave generator is started, and the microwave acts on the catalyst to rapidly heat the catalyst to generate more active point positions;
(3) controlling the temperature and time of catalysis in the catalysis bin, and catalytically decomposing the organic waste gas adsorbed by the catalyst;
(4) the organic waste gas on the side is decomposed by microwave concerted catalysis, when the organic waste gas concentration sensor detects that the organic waste gas in the catalytic bin on the side is reduced to the requirement, the PLC controls the valve to switch the air path, the catalytic bin on the side processes the organic waste gas entering from the air inlet, the valve of the air inlet and the air outlet is closed by the catalytic bin on the other side, the catalytic decomposition of the organic waste gas adsorbed by the catalyst is started, and the steps are repeated;
the preferable catalysis bins are formed by one or more parallel connection, and the number of the preferable catalysis bins is 2-3;
an air inlet valve and an air outlet valve are arranged on the preferable catalysis bin, and the air path is switched by controlling the opening and closing of the valves through a PLC (programmable logic controller);
preferably, the catalyst module contains MnO2，Al2O3，TiO2，ZnO，PbO，La2O3，Y2O3， ZrO2，Nb2O5A honeycomb or a granule of one or more active components of (a);
the content of the active ingredients in the catalyst module is preferably in the range of 1% -80%, and preferably in the range of 30-60%;
preferably, a temperature sensor is arranged in the catalytic cabin of the device;
the temperature of the concerted catalytic decomposition of the device is preferably 100-800 ℃, and the preferred range is 100-300 ℃;
the temperature keeping time of the concerted catalytic decomposition of the device is 0.5-20h preferably, and the preferred range is 1-3 h;
the power of the preferable microwave device is adjustable, and the power adjusting range of the microwave generator is 500-10000W;
preferably, an organic waste gas concentration sensor is arranged in the catalytic cabin of the device, when the concentration of the organic waste gas is reduced to 1-100ppm, the catalyst concerted catalysis process at the side is stopped, and the PLC switches the air path;
the whole set of device is preferably controlled by a PLC control system.
Compared with the existing organic waste gas treatment device, the device has the following characteristics:
1. the microwave heating replaces the traditional resistance wire heating, the temperature is more uniform, and the sintering of the catalyst is avoided;
2. the microwave is cooperated with the catalyst to treat the organic waste gas, so that more catalytic active sites are generated, and the efficiency is higher;
drawings
FIG. 1 is a front structure diagram of the technology and device for decomposing organic waste gas by microwave concerted catalysis.
FIG. 2 is a rear view structural diagram of the technology and device for decomposing organic waste gas by microwave concerted catalysis.
Wherein: 1. an air inlet; 2. an air outlet; 3. an air inlet valve; 4. an air outlet valve; 5. a microwave generator; 6. a temperature sensor; 7. a catalysis bin; 8. a catalyst module; 9. a PLC control system; 10. a condensing unit; 11. organic waste gas concentration sensor.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a front structure diagram of the technology and device for decomposing organic waste gas by microwave concerted catalysis.
FIG. 2 is a rear view structural diagram of the technology and device for decomposing organic waste gas by microwave concerted catalysis.
As shown in fig. 1 and fig. 2, a technique and apparatus for decomposing organic waste gas by microwave-assisted catalysis includes: the device comprises an air inlet 1, an air outlet 2, an air inlet valve 3, an air outlet valve 4, a microwave generator 5, a temperature sensor 6, a catalysis bin 7, a catalyst module 8, a PLC control system 9, a condensing device 10 and an organic waste gas concentration sensor 11.
The installation process of the device comprises the following steps:
the air inlet is arranged on an air duct of the box body at the rear part of the catalytic cabin, and the lower part of the box body is connected with the air inlet valve. The air inlet valve is arranged at the lower part of the catalysis bin and connected with the condensing device and the catalysis bin, and the air outlet valve is arranged at the upper part of the catalysis bin. The catalyst module is placed on a grid of the catalysis bin, and the grid is fixed in the catalysis bin in a welding mode. The structures in the left and right catalytic bins are the same. The temperature sensor and the organic waste gas concentration sensor are arranged in the middle of the catalytic cabin. The microwave generator is arranged on the back of the catalysis bin, and the microwaves enter the catalysis bin through an opening on the catalysis bin.
The working process of the whole device is as follows:
the PLC control system 9 controls the opening and closing of the air inlet valve 3 and the air outlet valve 4 to switch the direction of the catalytic cabin into which the organic waste gas enters, so that the catalytic cabin on one side opens the valve of the air inlet and the air outlet to catalytically treat the organic waste gas entering from the air inlet. The other side of the catalytic bin closes the valve of the air inlet and the air outlet, opens the microwave generator to heat, and heats the microwave and MnO2The catalyst generates a synergistic effect, the catalyst is heated, and a large amount of catalytic activity appears on the surface of the catalystAnd (3) a property point, when the temperature of the catalysis bin reaches 120 ℃, preserving heat for 1h, carrying out concerted catalytic decomposition on the organic waste gas on the side by microwave, when the organic waste gas concentration sensor detects that the organic waste gas in the catalysis bin on the side is reduced to 1ppm, controlling the valve to switch the air path by the PLC, closing the valve of the air inlet and the air outlet by the catalysis bin on one side, carrying out concerted catalytic decomposition on the organic waste gas, opening the valve of the air inlet and the air outlet by the catalysis bin on the other side, processing the organic waste gas entering from the air inlet, and carrying out reciprocating operation in such a way.
Claims (10)
1. A technology and a device for decomposing organic waste gas by microwave concerted catalysis are characterized in that: a catalyst module is combined with microwave to coordinate with catalytic oxidation reaction;
MnO can be selected as the catalyst module in the device for decomposing organic waste gas by microwave concerted catalysis2，Al2O3，TiO2，ZnO，PbO，La2O3，Y2O3，ZrO2，Nb2O5A honeycomb or a granule of one or more active components of (a);
the device for decomposing organic waste gas by microwave concerted catalysis comprises an air inlet, an air outlet, an air inlet valve, an air outlet valve, a catalysis bin, a microwave generator, a condensing device, a catalyst module, a temperature sensor, an organic waste gas concentration sensor and a PLC control system. The PLC control system is respectively connected with the temperature sensor, the organic waste gas concentration sensor, the air inlet valve, the air outlet valve and the microwave generator.
2. The microwave-assisted catalytic decomposition technology and device for organic waste gas according to claim 1, characterized by comprising the following steps:
(1) the PLC controls to open an air inlet and an air outlet valve of the catalytic bin at one side, and the catalytic bin at the side treats organic waste gas entering from the air inlet;
(2) meanwhile, the PLC controls the closing of the air inlet and the air outlet valve of the other side of the catalysis bin, the microwave generator is started, and the microwave acts on the catalyst to rapidly heat the catalyst to generate more active sites;
(3) controlling the temperature and time of catalysis in the catalysis bin, and catalytically decomposing the organic waste gas adsorbed by the catalyst;
(4) the organic waste gas of this side is decomposed by microwave concerted catalysis, and when organic waste gas concentration sensor detects in this side catalysis storehouse organic waste gas and falls to the requirement, PLC control valve switches the wind path, and the organic waste gas that gets into from the air intake is handled in this side catalysis storehouse, and the valve in business turn over wind gap is then closed in the catalysis storehouse of other side, begins the organic waste gas of catalytic decomposition catalyst absorption, so reciprocal.
3. The microwave-assisted catalytic decomposition technology and apparatus for organic waste gas according to claim 1, wherein the content of active components in the catalyst module is in the range of 1% -80%, preferably in the range of 30-60%.
4. The microwave-assisted catalytic decomposition technology and apparatus for organic waste gas according to claim 1, wherein the microwave device is installed at the back of the catalytic cabin, and the microwaves enter the catalytic cabin through the opening at the back of the catalytic cabin.
5. The microwave-assisted catalytic decomposition technology and device for organic waste gas as claimed in claim 1, wherein the microwave device has adjustable power, and the power adjustment range of the microwave generator is 500-10000W.
6. The microwave-assisted catalytic decomposition technology and apparatus for organic waste gas according to claim 1, wherein the temperature of the assisted catalytic decomposition is 100-800 ℃, and preferably 100-300 ℃.
7. The microwave concerted catalytic decomposition technique and device for organic waste gas as claimed in claim 1, wherein the concerted catalytic decomposition holding time is 0.5-20h, preferably 1-3 h.
8. The microwave-assisted catalytic decomposition technology and apparatus for organic waste gas according to claim 1, wherein the catalytic cabin is internally installed with a temperature sensor.
9. The microwave-assisted catalytic decomposition technology and device for organic waste gas according to claim 1, wherein the catalytic cabin is internally provided with an organic waste gas concentration sensor.
10. The microwave-assisted catalytic decomposition technology and device for organic waste gas according to claim 1, wherein the catalytic cabin is formed by connecting one or more catalytic cabins in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824248.XA CN114653175A (en) | 2021-07-21 | 2021-07-21 | Technology and device for decomposing organic waste gas by microwave concerted catalysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824248.XA CN114653175A (en) | 2021-07-21 | 2021-07-21 | Technology and device for decomposing organic waste gas by microwave concerted catalysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114653175A true CN114653175A (en) | 2022-06-24 |
Family
ID=82026349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110824248.XA Pending CN114653175A (en) | 2021-07-21 | 2021-07-21 | Technology and device for decomposing organic waste gas by microwave concerted catalysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114653175A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279270A (en) * | 2008-05-23 | 2008-10-08 | 哈尔滨工业大学 | Microwave deodorization catalyst for refuse burning and method for eliminating fetor from refuse burning by microwave |
| US20160089631A1 (en) * | 2013-10-15 | 2016-03-31 | Institute Of Process Engineering, Chinese Academy Of Sciences | Combined desulfuration, denitration, and demercuration apparatus and method using semi-dry process in circulating fluidized bed |
| CN107774120A (en) * | 2017-11-28 | 2018-03-09 | 武汉大学 | A kind of microwave cooperating catalysis oxidation VOCs technique |
| CN110538571A (en) * | 2019-07-10 | 2019-12-06 | 陕西青朗万城环保科技有限公司 | application method of catalyst in microwave field |
| CN111871172A (en) * | 2020-07-24 | 2020-11-03 | 中国科学院理化技术研究所 | Air purification device, air purification filter element and preparation of air purification filter element |
-
2021
- 2021-07-21 CN CN202110824248.XA patent/CN114653175A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279270A (en) * | 2008-05-23 | 2008-10-08 | 哈尔滨工业大学 | Microwave deodorization catalyst for refuse burning and method for eliminating fetor from refuse burning by microwave |
| US20160089631A1 (en) * | 2013-10-15 | 2016-03-31 | Institute Of Process Engineering, Chinese Academy Of Sciences | Combined desulfuration, denitration, and demercuration apparatus and method using semi-dry process in circulating fluidized bed |
| CN107774120A (en) * | 2017-11-28 | 2018-03-09 | 武汉大学 | A kind of microwave cooperating catalysis oxidation VOCs technique |
| CN110538571A (en) * | 2019-07-10 | 2019-12-06 | 陕西青朗万城环保科技有限公司 | application method of catalyst in microwave field |
| CN111871172A (en) * | 2020-07-24 | 2020-11-03 | 中国科学院理化技术研究所 | Air purification device, air purification filter element and preparation of air purification filter element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105521705A (en) | Method for treating organic waste gas through low-temperature plasma concerted catalysis | |
| CN107398142B (en) | Air purifying equipment with filter element free of replacement | |
| CN202778234U (en) | Combined-type organic waste gas treatment device | |
| CN206778161U (en) | A kind of fitting space air purifying device of automatic control transfusion | |
| CN104162323B (en) | A kind of self-activation air filtering system | |
| CN203565457U (en) | Organic exhaust gas processing device | |
| CN104043321A (en) | System for purifying exhaust gas generated during baking of enamelled wires | |
| CN108211686A (en) | A kind of tail gas photooxidation cracking purification method | |
| CN107983120A (en) | A kind of intelligent tail gas photooxidation cracking treating device using oil gas purification techniques | |
| CN103263830A (en) | Method for dealing with foul smell through atomization plasma oxidation-biomass adsorption | |
| CN206355830U (en) | A kind of combined type exhaust gas purification equipment | |
| CN201632187U (en) | Purification treatment equipment for high-concentration obnoxious gas and industrial waste gas | |
| CN207786305U (en) | A kind of tail gas photooxidation cracking treating device using oil gas purification techniques | |
| CN106090928A (en) | Ion energy house refuse incineration process device and incineration process method | |
| CN201421147Y (en) | Disinfection and purification device | |
| CN112755775A (en) | Efficient deodorization flue gas treatment process | |
| CN114653175A (en) | Technology and device for decomposing organic waste gas by microwave concerted catalysis | |
| CN204880406U (en) | Generalized type air purifier | |
| CN108844113B (en) | Fluidized bed type oil fume treatment equipment and application thereof | |
| CN204739680U (en) | Total heat exchange purifier of new trend system containing IFD module | |
| CN205649672U (en) | Integrative vortex sprays deodorization equipment | |
| CN213433847U (en) | Industrial waste gas photocatalysis treatment equipment | |
| CN210699476U (en) | Non-contact stink and peculiar smell gas treatment device | |
| CN211612161U (en) | Catalytic combustion technology is with carrying out high-efficient desorption system that desorption was handled to active carbon adsorption device | |
| CN104001400A (en) | Wet-type high-voltage ionization dust removing demister |
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 |