CN109675400B - Organic waste gas high-temperature pyrolysis device - Google Patents

Organic waste gas high-temperature pyrolysis device Download PDF

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CN109675400B
CN109675400B CN201811624640.4A CN201811624640A CN109675400B CN 109675400 B CN109675400 B CN 109675400B CN 201811624640 A CN201811624640 A CN 201811624640A CN 109675400 B CN109675400 B CN 109675400B
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waste gas
organic waste
zinc oxide
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honeycomb ceramic
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CN109675400A (en
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王浩
刘良兰
赵子健
郭欢欢
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Wuhan University of Technology WUT
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    • B01D53/005—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 heat treatment
    • C—CHEMISTRY; METALLURGY
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    • C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
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    • B01D2258/00—Sources of waste gases
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    • B01D2258/0283—Flue gases
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
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    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract

The invention relates to an organic waste gas high-temperature pyrolysis device, which comprises a shell box body, a quartz tube, zinc oxide honeycomb ceramics and a magnetron, wherein the shell box body is provided with a plurality of through holes; an organic waste gas inlet and an organic waste gas outlet are arranged on the shell box body; the quartz tube is arranged in the shell box body, one end of the quartz tube is arranged at the organic waste gas inlet, and the other end of the quartz tube is arranged at the organic waste gas outlet; the zinc oxide honeycomb ceramic is filled in the quartz tube to form a microwave high-temperature reaction bed; the magnetron is arranged outside the outer shell box body and used for carrying out radiant heating on the zinc oxide honeycomb ceramics; a resonant cavity is formed inside the housing box body. The device disclosed by the invention is used for the field of organic waste gas high-temperature purification by applying the characteristic that the tetrapod-shaped nano ZnOw can be rapidly heated and heated under the action of microwaves, the temperature of waste gas entering the device is controlled by adjusting the power of the microwaves, and the organic waste gas is subjected to high-temperature pyrolysis reaction in a high-temperature environment, so that the purpose of waste gas purification is realized.

Description

Organic waste gas high-temperature pyrolysis device
Technical Field
The invention relates to the technical field of organic waste gas purification, in particular to an organic waste gas high-temperature pyrolysis device.
Background
Volatile Organic Compounds (VOCs) are the main components of industrial organic waste gases, and generally refer to a class of organic chemicals existing in the air as vapor at normal temperature and pressure, and mainly include various aliphatic and aromatic alkanes, aromatic hydrocarbons, alkenes, oxygen-containing hydrocarbons, halogenated hydrocarbons, and the like, such as benzene, toluene, formaldehyde, dichloromethane, ethyl acetate, and the like. VOCs are mostly toxic substances, while volatile organic compounds are the main precursor substances constituting inhalable particles. If the emission of organic waste gas in the air is increased, the organic waste gas not only pollutes the environment, forms photochemical smog and destroys the ozone layer, but also causes serious damage to human bodies, and partial VOCs pollutants even cause the problems of carcinogenesis, mutation and the like of the human bodies, thereby seriously harming the health of people. It is imperative to find efficient methods to solve the problem of organic waste gas pollution.
Common organic waste gas treatment methods comprise a direct combustion method, a catalytic oxidation method and a low-temperature plasma methodCondensation method, adsorption and absorption method, photocatalytic decomposition method and biological filtration method. However, these methods have disadvantages. The direct combustion method is the earliest and most widely applied waste gas treatment technology, and is used for directly combusting VOCs (volatile organic compounds). the method is that gas containing VOCs is directly introduced into combustion equipment to combust the VOCs at high temperature, and if the concentration of the VOCs is high, the VOCs can be combusted well in a furnace to generate CO2And H2O, when the concentration of VOCs is low, the combustion is insufficient, so that additional combustible substances are required to be added, and finally, the VOCs are completely generated into CO2And H2O and the like, but unnecessary cost is increased, the method has the advantages of high waste gas treatment efficiency, low investment cost, simpler preparation equipment and more convenient operation, but the method using the combustion needs to maintain the condition of high-temperature combustion (more than 800 ℃) and has higher relative energy consumption. The catalytic oxidation method requires the use of an expensive noble metal catalyst, is prone to cause a catalyst poisoning phenomenon, and has high investment cost and maintenance cost. The reaction space size of the low-temperature plasma method is relatively small, and the centralized treatment of the organic waste gas generated in large scale in industrial production is difficult. The condensation method has higher operation difficulty coefficient and high cost. The adsorption and absorption method needs to consume a large amount of adsorbing materials such as active carbon and the like, and also needs post-treatment, so that the process is complicated; the study of biological treatment processes is currently immature and far from industrial application.
The microwave is an electromagnetic wave having a wavelength of 1m to 1mm, a frequency of 300MHz to 300GHz, and a wavelength band between a radio wave and an infrared ray. Compared with the traditional heating mode, the microwave heating mode has many advantages: uniform heating, high heating speed, selectivity, easy control, energy conservation, environmental protection, high-efficiency cleaning and the like. More importantly, the highly efficient thermal effects produced by microwave irradiation promote most chemical reactions, usually by increasing the efficiency and rate of reaction.
At present, microwave is mainly applied to the field of organic waste gas purification, namely VOCs (volatile organic compounds) are catalyzed and oxidized by microwave assistance, and the principle is that a microwave heating method is adopted to heat honeycomb ceramics loaded with a catalyst, and when the microwave is used, the honeycomb ceramics loaded with the catalyst are heatedWhen the engine waste gas passes through the honeycomb ceramics, flameless combustion occurs under the condition of lower ignition temperature, and the engine waste gas is oxidized and decomposed into CO2And H2However, this method is not highly practical.
Disclosure of Invention
The invention aims to solve the technical problems of high cost, high energy consumption, low practicability and the like in the prior art, and provides an organic waste gas high-temperature pyrolysis device.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-temperature pyrolysis device for organic waste gas comprises a housing box body, a quartz tube, zinc oxide honeycomb ceramics and a magnetron; an organic waste gas inlet and an organic waste gas outlet are formed in the shell box body; the quartz tube is arranged in the shell box body, one end of the quartz tube is arranged at the organic waste gas inlet, and the other end of the quartz tube is arranged at the organic waste gas outlet; the zinc oxide honeycomb ceramic is filled in the quartz tube to form a microwave high-temperature reaction bed; the magnetron is arranged outside the outer shell box body and used for heating the zinc oxide honeycomb ceramics by microwave radiation; a resonant cavity is formed inside the housing box body.
In the above scheme, the zinc oxide honeycomb ceramic is filled in the central position of the quartz tube, and the magnetron is installed outside the outer casing box and located right below the zinc oxide honeycomb ceramic.
In the scheme, sealing sleeves used for sealing the shell box body are arranged at the organic waste gas inlet and the organic waste gas outlet, and the sealing sleeves are arranged on the outer ring of the quartz tube.
In the above scheme, the inner layer of the housing box body is provided with a cooling water circulation interlayer, and the cooling water circulation interlayer is provided with a cooling water inlet and a cooling water outlet.
In the scheme, the heat-preservation refractory bricks are arranged outside the zinc oxide honeycomb ceramics and coated on the outer ring of the quartz tube to preserve heat of the reaction zone and prevent the high-temperature zone heat radiation from being transmitted to the case body shell to cause overhigh temperature of the furnace body, thereby ensuring safety.
In the scheme, the thermocouple is arranged at the organic waste gas outlet of the quartz tube and is used for detecting the temperature in the furnace in real time.
In the above scheme, the preparation method of the zinc oxide honeycomb ceramic comprises the following steps:
(1) preparing a powder raw material: selecting a proper sintering aid, grinding the sintering aid in a ball mill for 30-60 min, and uniformly mixing the sintering aid and zinc oxide powder according to a weight ratio of 1 (15-25) to obtain a powder raw material;
(2) preparing mud materials: weighing 20-35 wt% of water, 1-1.5 wt% of a dispersant, 1-2 wt% of a lubricant and 4-8 wt% of a plasticizer, which are based on the total weight of the obtained powder raw materials, slowly adding the dispersant, the lubricant and the plasticizer into the water, uniformly stirring, and mixing with the obtained powder raw materials to obtain plastic micelle pug;
(3) preparing a mud blank: putting the plastic pug obtained in the step (2) into a vacuum pug mill for vacuum pug milling to obtain a pug blank matched with the specification of a charging barrel of a forming machine;
(4) and (3) extrusion molding: putting the mud blank obtained in the step (3) into a vacuum extruder, and extruding a zinc oxide honeycomb ceramic biscuit with a required size through a die;
(5) drying and shaping: drying the honeycomb ceramic biscuit obtained in the step (4) until the water content in the biscuit body is less than or equal to 2%, keeping the parallel structure of honeycomb pore channels, and shaping the biscuit body into a honeycomb ceramic semi-finished product with the required specification;
(6) discharging glue from the blank body: removing organic matters from the honeycomb ceramic semi-finished product shaped in the step (5);
(7) and (3) firing a product: and (4) putting the honeycomb ceramic semi-finished product processed according to the size requirement in the step (6) into a kiln for sintering, and finally obtaining the required microwave absorption heating zinc oxide honeycomb ceramic.
In the scheme, in the preparation method of the zinc oxide honeycomb ceramic, the zinc oxide powder involved in the step (1) is a tetrapod-like zinc oxide whisker with microwave absorption and heating characteristics, and the particle size is 4-6 μm; the sintering aid is selected from sodium silicate or borax or a mixture of the sodium silicate and the borax, and the sodium silicate and the borax are uniformly mixed according to the weight ratio of 1 (0.5-2).
In the above scheme, in the preparation method of the zinc oxide honeycomb ceramic, in step (2), the dispersant is sodium polyacrylate, the lubricant is glycerol, and the plasticizer is yellow lake extract, sodium carboxymethylcellulose or gum arabic.
In the scheme, in the preparation method of the zinc oxide honeycomb ceramic, the drying method of the zinc oxide honeycomb ceramic biscuit in the step (5) is drying in the shade at room temperature or heating and drying at 40-60 ℃; organic matter is removed from the dried blank in the step (6), the glue discharging temperature is 200-600 ℃, and the heat preservation time is 2-4 hours; in the step (7), the sintering time is 6-8 h, the sintering temperature is 800-1000 ℃, and the heat preservation time is 1-3 h.
The invention has the beneficial effects that:
(1) the invention utilizes the excellent microwave-heat conversion characteristic of the tetrapod-shaped ZnOw to prepare the tetrapod-shaped nano ZnOw into microwave absorbing heating honeycomb ceramic, utilizes the unique parallel through pore structure, large specific surface area and other characteristics of the honeycomb ceramic to absorb waves to heat the zinc oxide honeycomb ceramic under a microwave field to rapidly raise the temperature of the zinc oxide honeycomb ceramic to form a uniform high-temperature reaction bed, and when organic waste gas containing VOCs passes through the zinc oxide honeycomb ceramic, oxidation reaction occurs, namely the VOCs in the air are subjected to O-heat conversion2Is oxidized to produce harmless CO2And H2O, thereby completing high-temperature purification, and effectively preventing side reactions due to the temperature uniformity of a reaction zone formed by microwave heating of the honeycomb ceramics;
(2) the device can strictly control the reaction temperature above the pyrolysis temperature of the VOCs by adjusting the microwave power, and can adjust the proper temperature according to different components, thereby effectively improving the pyrolysis efficiency of the VOCs and reducing unnecessary energy consumption;
(3) the device is not only suitable for the pyrolysis reaction of the VOCs with higher concentration, but also suitable for the oxidation reaction of the VOCs with lower concentration, and additional fuel is not required to be added;
(4) compared with the traditional heating method, the device has the advantages of low energy consumption, high working efficiency, simple structure and convenient operation.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural view of an organic waste gas pyrolysis apparatus according to the present invention.
In the figure: 10. a housing box; 11. an organic waste gas inlet; 12. an organic waste gas outlet; 20. a cooling water circulation interlayer; 21. a cooling water inlet; 22. a cooling water outlet; 30. sealing sleeves; 40. a quartz tube; 50. zinc oxide honeycomb ceramics; 60. heat-insulating refractory bricks; 70. a thermocouple; 80. a resonant cavity; 90. a magnetron.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the organic waste gas pyrolysis apparatus according to a preferred embodiment of the present invention includes an outer casing 10, a quartz tube 40, a wave-absorbing heating zinc oxide honeycomb ceramic 50, and a magnetron 90. An organic waste gas inlet 11 and an organic waste gas outlet 12 are arranged on the outer shell box body 10; the quartz tube 40 is installed in the housing box 10, one end of the quartz tube 40 is installed at the organic waste gas inlet 11, and the other end is installed at the organic waste gas outlet 12. The zinc oxide honeycomb ceramics 50 are filled in the quartz tube 40 to form a microwave high-temperature reaction bed; the magnetron 90 is arranged outside the outer casing box body 10 and is used for heating the zinc oxide honeycomb ceramics 50 by microwave radiation; the resonant cavity 80 is formed inside the housing box 10.
Further preferably, in the present embodiment, the wave-absorbing and heat-generating zinc oxide honeycomb ceramic 50 is filled in the central position of the quartz tube 40, and the magnetron 90 is installed outside the outer casing 10 and located in the oxidation chamberUnder the microwave radiation right below the zinc honeycomb ceramic 50, the zinc oxide ceramic absorbs the microwave and converts the microwave into heat to form a uniform high-temperature reaction bed, and when organic waste gas containing VOCs passes through the zinc oxide honeycomb ceramic 50, oxidation reaction occurs, namely the VOCs is O in the air2Is oxidized to produce harmless CO2And H2And O, thereby completing high-temperature purification. The output power of the magnetron 90 is adjusted through a microwave controller, so that the temperature of the reaction section is accurately controlled to be continuously adjustable at 10-1200 ℃. The wave-absorbing heating zinc oxide honeycomb ceramic 50 in the device can be rapidly heated to 1200 ℃ within 15min under the microwave radiation condition.
Further preferably, in the present embodiment, sealing sleeves 30 for sealing the housing box 10 are installed at the organic waste gas inlet 11 and the organic waste gas outlet, and the sealing sleeves 30 are installed at the outer rings of the quartz tubes 40.
Further preferably, in the present embodiment, a cooling water circulation interlayer 20 is disposed on an inner layer of the housing case 10 (i.e., between the resonant cavity 80 and the housing case 10), and the cooling water circulation interlayer 20 is provided with a cooling water inlet 21 and a cooling water outlet 22 for heat exchange with the outside. The circulating cooling water can not only prevent the magnetron 90 from having a too high temperature, but also absorb the microwaves, preventing the magnetron 90 from being damaged by the reflected microwaves, which can effectively protect the magnetron 90 and ensure the long-term operation of the whole pyrolysis apparatus.
Further optimize, in this embodiment, the exterior of the zinc oxide honeycomb ceramic 50 is provided with the heat-insulating refractory brick 60, and the heat-insulating refractory brick 60 is coated on the outer ring of the quartz tube 40, so as to insulate the reaction zone, and prevent the thermal radiation of the high temperature zone from spreading to the box body shell to cause the over-high temperature of the furnace body, thereby ensuring the safety.
Further preferably, in this embodiment, the organic waste gas outlet 12 of the quartz tube 40 is provided with a thermocouple 70 for detecting the temperature in the furnace in real time.
The wave-absorbing heating zinc oxide honeycomb ceramic 50 is one of key components of the invention, and the preparation method comprises the following steps:
(1) preparing a powder raw material: selecting a proper sintering aid, grinding the sintering aid in a ball mill for 30-60 min, and uniformly mixing the sintering aid and zinc oxide powder according to a weight ratio of 1 (15-25) to obtain a powder raw material;
(2) preparing mud materials: weighing 20-35 wt% of water, 1-1.5 wt% of a dispersant, 1-2 wt% of a lubricant and 4-8 wt% of a plasticizer, which are based on the total weight of the obtained powder raw materials, slowly adding the dispersant, the lubricant and the plasticizer into the water, uniformly stirring, and mixing with the obtained powder raw materials to obtain plastic micelle pug;
(3) preparing a mud blank: putting the plastic pug obtained in the step (2) into a vacuum pug mill for vacuum pug milling to obtain a pug blank matched with the specification of a charging barrel of a forming machine;
(4) and (3) extrusion molding: putting the mud blank obtained in the step (3) into a vacuum extruder, and extruding a zinc oxide honeycomb ceramic 50 biscuit with a required size through a die;
(5) drying and shaping: drying the honeycomb ceramic biscuit obtained in the step (4) until the water content in the biscuit body is less than or equal to 2%, keeping the parallel structure of honeycomb pore channels, and shaping the biscuit body into a honeycomb ceramic semi-finished product with the required specification;
(6) discharging glue from the blank body: removing organic matters from the honeycomb ceramic semi-finished product shaped in the step (5);
(7) and (3) firing a product: and (4) putting the honeycomb ceramic semi-finished product processed according to the size requirement in the step (6) into a kiln for sintering, and finally obtaining the required microwave absorption heating zinc oxide honeycomb ceramic 50.
The zinc oxide powder involved in the step (1) is a tetrapod-like zinc oxide whisker with microwave absorption and heating characteristics, and the particle size is 4-6 microns; the sintering aid is selected from sodium silicate or borax or a mixture of the sodium silicate and the borax, and the sodium silicate and the borax are uniformly mixed according to the weight ratio of 1 (0.5-2).
In the step (2), the dispersant is sodium polyacrylate, the lubricant is glycerol, and the plasticizer is yellow lake essence, sodium carboxymethylcellulose or gum arabic.
The drying method of the zinc oxide honeycomb ceramic 50 biscuit in the step (5) is drying in the shade at room temperature or heating and drying at 40-60 ℃; organic matter is removed from the dried blank in the step (6), the glue discharging temperature is 200-600 ℃, and the heat preservation time is 2-4 hours; in the step (7), the sintering time is 6-8 h, the sintering temperature is 800-1000 ℃, and the heat preservation time is 1-3 h.
The decomposition principle of the organic waste gas high-temperature pyrolysis device is as follows: the invention utilizes the excellent microwave-heat conversion characteristic of the tetrapod-shaped ZnOw to prepare the tetrapod-shaped nano ZnOw into microwave absorbing heating honeycomb ceramic, utilizes the unique parallel through pore structure, large specific surface area and other characteristics of the honeycomb ceramic to absorb waves to heat the zinc oxide honeycomb ceramic 50 under a microwave field to rapidly raise the temperature of the zinc oxide honeycomb ceramic 50 to form a uniform high-temperature reaction bed, and when organic waste gas containing VOCs passes through the zinc oxide honeycomb ceramic 50, oxidation reaction is carried out, namely the VOCs are O in the air2Is oxidized to produce harmless CO2And H2And O, thereby completing high-temperature purification.
In order to verify the effectiveness of the organic waste gas high-temperature pyrolysis device, the organic waste gas high-temperature pyrolysis device is tested and verified, and the specific operation method comprises the following steps:
(a) filling the central position of a quartz tube 40 with a tetrapod-shaped ZnOw honeycomb ceramic with the filling length of 12mm to form a microwave high-temperature reaction bed;
(b) adjusting the microwave power of a magnetron 90, changing the temperature of the high-temperature reaction bed layer, and maintaining the temperature of the bed layer in a temperature range required by the high-temperature pyrolysis reaction of the organic waste gas;
(c) five different organic waste gases and nitrogen with the concentration of 1000ppm are respectively introduced into an air inlet of the organic waste gas high-temperature pyrolysis device, the retention time of the gas in a microwave high-temperature reaction bed is 2s, the reaction pressure is normal pressure, and the five organic waste gases are respectively: formaldehyde in an amount of 10 vol% (formaldehyde gas combustion explosion limit, lower limit of 7 vol%, upper limit of 73 vol%), benzene in an amount of 1.8 vol% (benzene gas combustion explosion limit, lower limit of 1.2 vol%, upper limit of 8.0 vol%), toluene in an amount of 1.8 vol% (toluene gas combustion explosion limit, lower limit of 1.2 vol%, upper limit of 7.0 vol%), xylene in an amount of 1.8 vol% (xylene gas combustion explosion limit, lower limit of 1.0 vol%, upper limit of 7.6 vol%), acetone in an amount of 3 vol% (acetone gas combustion explosion limit, lower limit of 2.6 vol%, upper limit of 12.8%);
(d) and collecting the treated gas, and detecting whether harmful gas is contained.
Table 1 shows five organic waste gases, reaction temperatures and test results.
TABLE 1
Organic waste gas Temperature of microwave high-temperature reaction bed The result of the detection
10 vol% formaldehyde 800℃ Formaldehyde was not detected
1.8 vol% benzene 800℃ Benzene was not detected
1.8 vol% toluene 800℃ Toluene not detected
1.8 vol% xylene 800℃ Undetected for xylene
3 vol% acetone 900℃ Acetone was not detected
The detection results in table 1 demonstrate the effectiveness of the device of the present invention, and the organic waste gas can be discharged after being pyrolyzed at high temperature by the device. The device of the invention has the following advantages:
(1) because of the temperature uniformity of the reaction zone formed by microwave heating of the honeycomb ceramics, the generation of side reactions can be effectively prevented;
(2) the device can strictly control the reaction temperature above the pyrolysis temperature of the VOCs by adjusting the microwave power, and can adjust the proper temperature according to different components, thereby effectively improving the pyrolysis efficiency of the VOCs and reducing unnecessary energy consumption;
(3) the device is not only suitable for the pyrolysis reaction of the VOCs with higher concentration, but also suitable for the oxidation reaction of the VOCs with lower concentration, and additional fuel is not required to be added;
(4) compared with the traditional heating method, the device has the advantages of low energy consumption, high working efficiency, simple structure and convenient operation.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. The organic waste gas high-temperature pyrolysis device is characterized by comprising a shell box body, a quartz tube, zinc oxide honeycomb ceramics and a magnetron; an organic waste gas inlet and an organic waste gas outlet are formed in the shell box body; the quartz tube is arranged in the shell box body, one end of the quartz tube is arranged at the organic waste gas inlet, and the other end of the quartz tube is arranged at the organic waste gas outlet; the zinc oxide honeycomb ceramic is filled in the quartz tube to form a microwave high-temperature reaction bed; the magnetron is arranged outside the outer shell box body and used for heating the zinc oxide honeycomb ceramics by microwave radiation; a resonant cavity is formed inside the shell box body; a cooling water circulation interlayer is arranged on the inner layer of the shell box body, and is provided with a cooling water inlet and a cooling water outlet;
the preparation method of the zinc oxide honeycomb ceramic comprises the following steps:
(1) preparing a powder raw material: selecting a proper sintering aid, grinding the sintering aid in a ball mill for 30-60 min, and uniformly mixing the sintering aid and zinc oxide powder according to a weight ratio of 1 (15-25) to obtain a powder raw material;
(2) preparing mud materials: weighing 20-35 wt% of water, 1-1.5 wt% of a dispersant, 1-2 wt% of a lubricant and 4-8 wt% of a plasticizer, which are based on the total weight of the obtained powder raw materials, slowly adding the dispersant, the lubricant and the plasticizer into the water, uniformly stirring, and mixing with the obtained powder raw materials to obtain plastic micelle pug;
(3) preparing a mud blank: putting the plastic pug obtained in the step (2) into a vacuum pug mill for vacuum pug milling to obtain a pug blank matched with the specification of a charging barrel of a forming machine;
(4) and (3) extrusion molding: putting the mud blank obtained in the step (3) into a vacuum extruder, and extruding a zinc oxide honeycomb ceramic biscuit with a required size through a die;
(5) drying and shaping: drying the honeycomb ceramic biscuit obtained in the step (4) until the water content in the biscuit body is less than or equal to 2%, keeping the parallel structure of honeycomb pore channels, and shaping the biscuit body into a honeycomb ceramic semi-finished product with the required specification;
(6) discharging glue from the blank body: removing organic matters from the honeycomb ceramic semi-finished product shaped in the step (5);
(7) and (3) firing a product: and (4) putting the honeycomb ceramic semi-finished product processed according to the size requirement in the step (6) into a kiln for sintering, and finally obtaining the required microwave absorption heating zinc oxide honeycomb ceramic.
2. The organic waste gas pyrolysis device of claim 1, wherein the zinc oxide honeycomb ceramic is filled in a central position of the quartz tube, and the magnetron is installed outside the outer casing and is positioned right below the zinc oxide honeycomb ceramic.
3. The organic waste gas high-temperature pyrolysis device according to claim 1, wherein sealing sleeves for sealing the housing box body are mounted at the organic waste gas inlet and the organic waste gas outlet, and the sealing sleeves are mounted on outer rings of the quartz tubes.
4. The organic waste gas high-temperature pyrolysis device according to claim 1, wherein heat-insulating refractory bricks are arranged outside the zinc oxide honeycomb ceramics, and are coated on the outer ring of the quartz tube to insulate the reaction zone, and prevent the high-temperature zone heat radiation from being transmitted to the box body shell to cause the over-high temperature of the furnace body, so that the safety is guaranteed.
5. The organic waste gas high-temperature pyrolysis device according to claim 1, wherein a thermocouple is arranged at an organic waste gas outlet of the quartz tube and is used for detecting the temperature in the furnace in real time.
6. The organic waste gas high-temperature pyrolysis device according to claim 1, wherein in the preparation method of the zinc oxide honeycomb ceramic, the zinc oxide powder involved in the step (1) is tetrapod-like zinc oxide whiskers with microwave absorption heating characteristics, and the particle size is 4-6 μm; the sintering aid is selected from sodium silicate or borax or a mixture of the sodium silicate and the borax, and the sodium silicate and the borax are uniformly mixed according to the weight ratio of 1 (0.5-2).
7. The organic waste gas pyrolysis device according to claim 1, wherein in the preparation method of the zinc oxide honeycomb ceramic, in the step (2), the dispersant is sodium polyacrylate, the lubricant is glycerol, and the plasticizer is yellow lake essence, sodium carboxymethylcellulose or gum arabic.
8. The organic waste gas high-temperature pyrolysis device according to claim 1, wherein in the preparation method of the zinc oxide honeycomb ceramic, the drying method of the zinc oxide honeycomb ceramic biscuit in the step (5) is room-temperature drying in the shade or heating and drying at 40-60 ℃; organic matter is removed from the dried blank in the step (6), the glue discharging temperature is 200-600 ℃, and the heat preservation time is 2-4 hours; in the step (7), the sintering time is 6-8 h, the sintering temperature is 800-1000 ℃, and the heat preservation time is 1-3 h.
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