CN209188456U - One kind being based on microwave plasma malodorous gas processing system - Google Patents
One kind being based on microwave plasma malodorous gas processing system Download PDFInfo
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- CN209188456U CN209188456U CN201821328542.1U CN201821328542U CN209188456U CN 209188456 U CN209188456 U CN 209188456U CN 201821328542 U CN201821328542 U CN 201821328542U CN 209188456 U CN209188456 U CN 209188456U
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Abstract
The utility model discloses a kind of malodorous gas processing systems based on microwave plasma, it is related to chemical industry foul gas processing equipment field, drip irrigation device includes microwave generator, the microwave guiding arrangement connecting with microwave generator and the nonmetallic discharge tube being arranged in microwave guiding arrangement；The nonmetallic discharge tube both ends open；Discharge wire is provided in the nonmetallic discharge tube, the both ends of the discharge wire are in microwave guiding arrangement；Gas pipeline is communicated on the nonmetallic discharge tube.Gas pipeline is communicated on the nonmetallic discharge tube.The foul gas of high concentration, big flow can be handled, and have the characteristics that processing is thorough, treatment effeciency is high, stability is strong.
Description
Technical field
It is the invention belongs to chemical industry foul gas processing equipment field, in particular to a kind of based on microwave plasma
Malodorous gas processing system.
Background technique
With the rapid development of our country's economy, industrialization and urbanization degree is constantly promoted, the generation of foul gas also phase
It should increase, bring severe environmental problem.Foul gas is defined as: all stimulation olfactory organs cause people unhappy and damage
The gaseous matter (standard GB/T 14554-93) of bad living environment.
Industrial production, municipal wastewater, Treatment of Sludge and refuse disposal facility etc. are the main sources of foul gas.Effluvium
Body is primarily generated at blowdown pumping plant in sewage disposal process, trash rack, Loss-on-drying gas settling pit, primary sedimentation tank etc., Treatment of Sludge
Sludge condensation in the process, dehydration and drying, transhipment etc., compost treatment, landfill, burning, transhipment in garbage processing procedure etc.
The corresponding generating source such as place and chemical pharmacy, rubber plastic, paint, printing and dyeing leather, livestock cultivation and fermentation pharmacy
Place.
Different treatment facilities and process can generate a variety of different foul gas.The inlet water lifting pumps room of sewage treatment plant
The main foul smell generated is hydrogen sulfide, and the foul smell generated in first clarifier sludge anaerobic digestion process is with hydrogen sulfide and other sulfur-bearings
Based on gas, ammonia and other volatile substances can be generated in sludge digestion stabilization process.Ammonia can be generated during garbage compost
The foul smell such as gas, amine, sulfide, fatty acid, aromatic series and dimethyl disulfide.There may be minimal amounts for aerobicization and sludge air drying process
Hydrogen sulfide, but mainly there is mercaptan and dimethyl disulfide gas to generate.
Odorant is many kinds of, from a wealth of sources, all can to human body respiration, digestion, angiocarpy, endocrine and nervous system
Different degrees of murder by poisoning is caused, wherein aromatic compound such as benzene, toluene, styrene etc. can also make human body generate distortion, canceration.
Therefore foul gas not only influences the sense organ of people, even more has actual harm to human body.
Due to the serious harm of foul gas, there are strict standard, such as national standard in country to the discharge of foul gas
GB14554-93: " emission standard for odor pollutants ".
The processing mode of current foul gas mainly includes photodissociation catalytic oxidation, flame combustion, catalysis burning, inhales
Receive absorption, biological treatment, corona discharge etc..And such mode is for high concentration (generally greater than 1000 g/m3), big flow (one
As be higher than 100 m3/h), the treatment effeciency of foul gas containing organic macromolecule it is not high, there is also the at high cost, reaction time
The harmful side products such as the long and too low generation dioxin for the treatment of temperature by using the mode of corona discharge, produce at the same time
Raw ion energy is too low.A kind of malodorous gas processing system based on microwave plasma is now provided.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of based on microwave plasma
Malodorous gas processing system can be handled the foul gas of high concentration, big flow, and had and handled thorough, processing effect
The features such as rate is high, stability is strong.
To achieve the above object, the utility model provides following technical solution:
A kind of malodorous gas processing system based on microwave plasma, including microwave generator and microwave generator connect
The microwave guiding arrangement connect and the nonmetallic discharge tube being arranged in microwave guiding arrangement；The nonmetallic discharge tube both ends
Opening；Discharge wire is provided in the nonmetallic discharge tube, the both ends of the discharge wire are in microwave guiding arrangement；Institute
It states and is communicated with gas pipeline on nonmetallic discharge tube.
By using above-mentioned technical proposal, when handling foul gas, by the microwave generator of setting and micro-
Wave conduction device can produce microwave electric field, and the discharge wire in nonmetallic discharge tube can occur under the action of microwave electric field
Power generation when gas to be processed is carried out in nonmetallic discharge tube, can produce preionization effect by discharge wire electric discharge, so that non-gold
Belong to and be able to excitation microwave plasma in discharge tube, microwave plasma fully relies on electric power generation, is not necessarily to fuel, without catalysis
Agent does not also generate additional material for foul gas processing, and microwave plasma source energy conversion efficiency is high, generation it is equal from
Daughter energy density is big, and degradation volatile organic compounds is more thorough, and treatment effeciency is high, stability is strong.
Preferably, being arranged at the center of the nonmetallic discharge tube at distance microwave conduction device terminal surface (1/4 λ+k λ)
Place, λ are microwave wavelength in system, and k is the integer more than or equal to 0.
It is maximum for microwave electric field at 1/4 wavelength location in microwave guiding arrangement by using above-mentioned technical proposal
Position places nonmetallic discharge tube in the position, the excitation plasma that can be more easier, thus, it is carried out to gas
When processing, it is more easier, thoroughly.
Preferably, the discharge wire can be aciculiform, annular or spiral shape.
By using above-mentioned technical proposal, the concrete shape of discharge wire can be aciculiform, annular, spiral shape, it can steady
Fixed electric discharge.
Preferably, the discharge wire is embedded in the shape of a spiral in nonmetallic discharge tube, and the discharge wire is close to gas pipeline
Side be set as tip-shape, and the tip be directed toward nonmetallic electric discharge tube axis line position.
By using above-mentioned technical proposal, in normal work, it is provided with tip in discharge wire, enables tip rate
It first generates electricity, by the preionization effect that point discharge generates, so that being able to excitation microwave plasma in nonmetallic discharge tube
Body, and the microwave plasma after excitation is located at discharge tube central core region, is not easy with the discharge wire against discharge tube inner sidewall
Contact, to play the role of that wire is protected not to be etched, while also ensuring the discharge stability of discharge wire, increases and put
The service life of electrical filament.
Preferably, the microwave generator uses magnetron, prionotron, travelling-wave tubes, gyrotron or all solid state microwave source
It is any one or more of.
Preferably, the microwave guiding arrangement includes that waveguide resonant cavity, microwave coaxial transmission line are any one or more of.
Preferably, the nonmetallic discharge tube is made of any one of quartz, corundum, refractory ceramics, high temp glass.
By using above-mentioned technical proposal, the nonmetallic discharge tube being made by using nonmetallic, heat-resisting material,
There are electromagnetic fields in nonmetallic discharge tube, and internal conversion zone can be isolated.
Preferably, the microwave frequency of the microwave guiding arrangement is between 300MHz-300GHz.
Preferably, the gas pipeline is connected to the upper end of the nonmetallic discharge tube, described nonmetallic discharge tube one end
It is flushed with microwave guiding arrangement top, the other end stretches out outside microwave guiding arrangement, and nonmetallic discharge tube stretches out microwave transmission dress
It sets outer end and forms gas outlet.
It is disliked by using above-mentioned technical proposal by reserving certain space in the middle part of nonmetallic discharge tube so as to facilitate
Odour is degraded by microwave plasma.At high temperature, the obtained product after degradation is the harmless gas such as carbon dioxide, water
State mixture, the gaseous mixture are directly emitted into atmosphere by gas outlet.
In conclusion the utility model has the following beneficial effects:
1, be not necessarily to electrode, not by the constraint of electrode gap, also be not present electrode erosion, electrode fouling the problem of；
2, microwave plasma is excited by microwave energy, and transmission, detection, protection and the control system of microwave energy can be with
Plasma reaction zones separate, convenient for control production process；
3, microwave plasma fully relies on electric power generation, is not necessarily to fuel, is not necessarily to catalyst, and foul gas is handled,
Also additional material is not generated, microwave plasma source energy conversion efficiency is high, and the energy density of plasma of generation is big, and degradation is waved
Hair property organic compound is more thorough.At the same time, the device of setting can minimize, and have stronger practical application value；
4, for complicated foul gas constituent, traditional approach is often difficult to handle, by microwave plasma
The high mildness actives group of body, the foul gas more complex to structure, which is also able to carry out, effectively degrades；
5, it is provided with tip in discharge wire, tip rate is first generated electricity, generated by point discharge pre-
Ionization effect so that be able in nonmetallic discharge tube excitation microwave plasma, and excite after microwave plasma be located at put
Fulgurite central core region is not easy to contact, protects wire not ablated to play with the discharge wire against discharge tube inner sidewall
Effect, while also ensuring the discharge stability of discharge wire, increase the service life of discharge wire.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of malodorous gas processing system based on microwave plasma；
Fig. 2 is a kind of schematic diagram of protruding tip in malodorous gas processing system based on microwave plasma.
Appended drawing reference: 1, microwave generator；2, microwave guiding arrangement；3, nonmetallic discharge tube；31, gas outlet；4, it discharges
Silk；41, tip；5, gas pipeline.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing, wherein the identical attached drawing of identical components
Label indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down", " bottom
Face " and " top surface " refer to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from particular elements geometry
The direction at center.
Embodiment one
A kind of malodorous gas processing system based on microwave plasma, as shown in Figure 1, include microwave generator 1, with it is micro-
The microwave guiding arrangement 2 that wave producer 1 connects and the nonmetallic discharge tube 3 being arranged in microwave guiding arrangement 2, it is nonmetallic
Discharge wire 4 is provided in discharge tube 3, meanwhile, it is communicated with gas pipeline 5 in one end of nonmetallic discharge tube 3, is carried out to gas
When processing, first by gas to be processed by so that gas enters nonmetallic discharge tube 3, then opening micro- in gas pipeline 5
Wave producer 1 adjusts microwave source power by the control system on microwave generator 1, and microwave energy passes through microwave guiding arrangement
Transmitting, excites microwave plasma in nonmetallic discharge tube 3, is dropped by microwave plasma to the foul gas being passed through
Solution.
Microwave generator 1 can be using appointing in magnetron, prionotron, travelling-wave tubes, gyrotron or all solid state microwave source
One or more, when in use, generated microwave frequency is between 300MHz-300GHz.Microwave guiding arrangement 2 includes waveguide
Resonant cavity, microwave coaxial transmission line are any one or more of.
Referring to figs. 1 and 2, one end of microwave guiding arrangement 2 is connect with microwave generator 1, is installed in the other side non-
Metal discharge pipe 3.
When nonmetallic discharge tube 3 is arranged, one section of pipeline section of nonmetallic discharge tube 3 is in inside microwave guiding arrangement 2, will
Nonmetallic discharge tube 3 is arranged at 2 terminal surface of distance microwave conduction device (1/4 λ+k λ), and λ is microwave wavelength in system, and k is big
In the integer for being equal to 0, wherein above signified end is one end that microwave guiding arrangement 2 is horizontally away from microwave generator 1
Face.Because the position is the maximum position of microwave field density, nonmetallic discharge tube 3 is placed in the position, can be more easier to swash
Plasma is sent out, thus, when handling gas, it can be more easier and handle more thoroughly.Wherein, nonmetallic electric discharge
Pipe 3 can be made using quartz, corundum, refractory ceramics, any one or more of heat-resisting material of high temp glass.Pass through
Using nonmetallic discharge tube 3, it can make inside nonmetallic discharge tube 3 that there are electromagnetic fields, to facilitate in internal excitation plasma
Body.
Discharge wire 4 can be to be fixed on nonmetallic discharge tube 3 by the modes such as being bonded, mounting, and discharge wire 4 is in micro-
Inside wave conduction device 2；So as to guarantee the discharge wire 4 normally excitation plasma.4 material of discharge wire can be used various resistance to
High-temperature electric conduction material, such as all kinds of conductive materials of iron, copper, tungsten, rhenium, osmium, tantalum are any one or more of.Its shape can be needle
Shape, annular or spiral shape can be stablized and generate plasma, in discharge wire 4 close to one end Xiang Feijin of gas pipeline 5
Belong to 3 central axial direction of discharge tube and extends to form tip 41.
When by discharge wire 4 using it is spiral-shaped when, be entrenched in nonmetallic discharge tube 3, and by the close of discharge wire 4
One end of gas pipeline 5 is set as tip 41, and 3 weeks heart line positions of nonmetallic discharge tube are directed toward in the position at tip 41.So that putting
Under microwave electric field effect, tip 41 takes the lead in discharging electrical filament 4.
When treating processing gas and being handled, into the foul gas in nonmetallic discharge tube 3 be usually odorant,
The mixture of air.By the preionization effect that point discharge generates so that be able in nonmetallic discharge tube 3 excitation microwave etc. from
Daughter, and the microwave plasma after excitation is located at discharge tube central core region, does not allow with the discharge wire 4 against discharge tube inner sidewall
Easily contact, to play the role of that wire is protected not to be etched, while also ensuring the discharge stability of discharge wire 4, increases
The service life of discharge wire 4.
Microwave plasma is a kind of plasma for being generated and being maintained come source excitation as energy using microwave.Microwave etc.
Gas ions have the high temperature of several thousand degrees celsius, and contain more rich active group, can carry out the processing to various substances.
Microwave plasma body technique has the following characteristics that
1) be not necessarily to electrode, not by the constraint of electrode gap, also be not present electrode erosion, electrode fouling the problem of；
2) microwave plasma is excited by microwave energy, and transmission, detection, protection and the control system of microwave energy can be with
Plasma reaction zones separate, convenient for control production process；
3) microwave plasma fully relies on electric power generation, is not necessarily to fuel, is not necessarily to catalyst, and foul gas is handled,
Also additional material is not generated, microwave plasma source energy conversion efficiency is high, and the energy density of plasma of generation is big, and degradation is waved
Hair property organic compound is more thorough.At the same time, the device of setting can minimize, and have stronger practical application value.
4) for complicated foul gas constituent, traditional approach is often difficult to handle, by microwave plasma
The high mildness actives group of body, the foul gas more complex to structure, which is also able to carry out, effectively degrades.
In conclusion foul gas can be handled using microwave plasma body technique, and thorough with processing,
Treatment effeciency is high, stability is strong, technique is convenient for advantages such as controls.
The upper end of nonmetallic discharge tube 3 is arranged in gas pipeline 5, from upper end into nonmetallic discharge tube 3 by be processed
Gas.Nonmetallic discharge tube 3 is extended downward into lower than microwave guiding arrangement 2, and is offered out in the lower end of nonmetallic discharge tube 3
Port 31.So that in the middle part of nonmetallic discharge tube 3 reserve certain space, so as to facilitate foul gas by microwave plasma into
Row degradation.At high temperature, the obtained product after degradation is the harmless gaseous mixtures such as carbon dioxide, water, the gaseous mixture
Directly it is emitted into atmosphere by gas outlet 31.
The specific workflow of the present embodiment are as follows:
Step 1, gas pipeline direction and the nonmetallic microwave discharge as shown in Figure 1 of pending foul gas will be connected to
Pipe 3 connects；
Step 2, microwave generator 1 is opened, (the output of microwave source power is adjusted by the control system of the microwave generator 1
Power is continuously adjustable, adjustable range 0.1-30kW), microwave plasma is excited from the air with paraxylene；
Step 3, it opens foul gas and is passed through valve, handled, treated that foul gas finally converts through this system
For the nontoxic substance such as carbon dioxide and water, it is expelled directly out by gas outlet 31.
Embodiment two
Using Microwave plasma treatment foul gas, according to conventional low temperature (1000 DEG C) burning disposal rubbish, meeting
Generate the harmful substances such as dioxin.(9000-10000 DEG C) of high temperature burning is carried out according to modes such as electric arcs, energy consumption is excessive, and
A large amount of nitrogen oxides can also be generated.
Using the malodorous gas processing system in embodiment one, adjustment microwave power is 800W, wherein the effluvium being passed through
Body type is paraxylene, and carrier gas is air, and gas flow 3.0pm can measure discrepancy paraxylene by gas chromatograph
The efficiency of evolution of concentration, the dimethylbenzene of various concentration is as shown in table 1.
Table 1 uses microwave plasma paraxylene to carry out, and treated purifies testing result
| Para-xylene concentration (ppm) | 4112 | 4916 | 5458 | 6038 | 6599 |
| Purification efficiency (%) | 99.996 | 99.990 | 99.988 | 99.964 | 99.982 |
Embodiment three
Using the malodorous gas processing system in embodiment one, adjustment microwave power is 800W, and the flow for being passed through gas is
The efficiency of evolution of 3.0pm, the dimethylbenzene of various concentration are as shown in table 2.
Table 2 uses microwave plasma paraxylene to carry out, and treated purifies testing result
| Para-xylene concentration (ppm) | 3886 | 4628 | 5548 | 6228 | 6966 |
| Purification efficiency (%) | 99.987 | 99.985 | 99.991 | 99.992 | 99.990 |
By the experimental data of embodiment two and embodiment three it may be concluded that by using microwave plasma to evil
Odour is handled, and more thorough, the treatment effeciency height of the foul gas degradation of concentration are ignorant of to different flow.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (9)
1. a kind of malodorous gas processing system based on microwave plasma, it is characterised in that: including microwave generator (1), with
The microwave guiding arrangement (2) of microwave generator (1) connection and the nonmetallic discharge tube being arranged in microwave guiding arrangement (2)
(3)；Nonmetallic discharge tube (3) both ends open；
It is provided with discharge wire (4) in the nonmetallic discharge tube (3), the both ends of the discharge wire (4) are in microwave transmission dress
It sets in (2)；
Gas pipeline (5) are communicated on the nonmetallic discharge tube (3).
2. the malodorous gas processing system according to claim 1 based on microwave plasma, it is characterized in that: the non-gold
Belong to and being arranged at distance microwave conduction device (2) terminal surface (1/4 λ+k λ) at the center of discharge tube (3), λ is microwave wave in system
Long, k is the integer more than or equal to 0.
3. the malodorous gas processing system according to claim 1 based on microwave plasma, it is characterized in that: the electric discharge
Silk (4) is aciculiform, annular or spiral shape.
4. the malodorous gas processing system according to claim 1-3 based on microwave plasma, it is characterized in that:
The discharge wire (4) is in the shape of a spiral in nonmetallic discharge tube (3), and the discharge wire (4) is close to the side of gas pipeline
It is set as tip-shape, and nonmetallic discharge tube (3) axle center line position is directed toward at the tip.
5. the malodorous gas processing system according to claim 1 based on microwave plasma, it is characterized in that: the microwave
Generator (1) is any one or more of using magnetron, prionotron, travelling-wave tubes, gyrotron or all solid state microwave source.
6. the malodorous gas processing system according to claim 1 based on microwave plasma, it is characterized in that: the microwave
Conduction device (2) includes that waveguide resonant cavity, microwave coaxial transmission line are any one or more of.
7. according to claim 1 or 2 described in any item malodorous gas processing systems based on microwave plasma, feature
Be: the nonmetallic discharge tube (3) is made of any one of quartz, corundum, refractory ceramics, high temp glass.
8. the malodorous gas processing system according to claim 1 based on microwave plasma, it is characterized in that: the microwave
The microwave frequency of conduction device (2) is between 300MHz-300GHz.
9. according to claim 1 or 2 described in any item malodorous gas processing systems based on microwave plasma, feature
Be: the gas pipeline (5) is connected to the upper end of the nonmetallic discharge tube (3), described nonmetallic discharge tube (3) one end with it is micro-
It is flushed at the top of wave conduction device (2), the other end stretches out microwave guiding arrangement (2) outside, and nonmetallic discharge tube (3) stretches out microwave and passes
It leads the end of device (2) outside and forms gas outlet (31).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821328542.1U CN209188456U (en) | 2018-08-16 | 2018-08-16 | One kind being based on microwave plasma malodorous gas processing system |
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| CN201821328542.1U CN209188456U (en) | 2018-08-16 | 2018-08-16 | One kind being based on microwave plasma malodorous gas processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512195A (en) * | 2019-09-20 | 2019-11-29 | 武汉工程大学 | A kind of tubular material inner surface carries out the method and device of MPCVD |
-
2018
- 2018-08-16 CN CN201821328542.1U patent/CN209188456U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512195A (en) * | 2019-09-20 | 2019-11-29 | 武汉工程大学 | A kind of tubular material inner surface carries out the method and device of MPCVD |
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