NL2033965B1 - Low-temperature plasma device for treating dioxin - Google Patents

Low-temperature plasma device for treating dioxin Download PDF

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Publication number
NL2033965B1
NL2033965B1 NL2033965A NL2033965A NL2033965B1 NL 2033965 B1 NL2033965 B1 NL 2033965B1 NL 2033965 A NL2033965 A NL 2033965A NL 2033965 A NL2033965 A NL 2033965A NL 2033965 B1 NL2033965 B1 NL 2033965B1
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housing
low
temperature plasma
assembly
shell
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NL2033965A
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Dutch (nl)
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Liu Liyuan
Guo Jianbo
Wang Tongzhe
Yang Shitong
Zhang Xiujin
Zhou Cong
Chen Yang
Feng Qinzhong
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Univ Cas
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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
    • B01D53/32—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 electrical effects other than those provided for in group B01D61/00
    • B01D53/323—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 electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
    • 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
    • B01D53/8659—Removing halogens or halogen compounds
    • B01D53/8662—Organic halogen compounds
    • 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
    • B01D53/32—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 electrical effects other than those provided for in group B01D61/00
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B01D53/70—Organic halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/70—Non-metallic catalysts, additives or dopants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/206—Organic halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/206—Organic halogen compounds
    • B01D2257/2064—Chlorine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B01D2257/602—Mercury or mercury compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B01D2258/0291—Flue gases from waste incineration plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B01D2259/818—Employing electrical discharges or the generation of a plasma
    • 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
    • B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The invention relates to the technical field of waste gas treatment of solid waste incineration, and in particular to a low-temperature plasma device for treating dioxin. The invention comprises a shell and at least one titanium wire, where the shell has a cylindrical structure, the titanium wire is arranged parallel to the axis of the shell, a polar plate assembly is arranged between the titanium wire and the inner wall of the shell, the length of the titanium wire is not less than that of the polar plate assembly, an air inlet assembly is arranged at one end of the shell, an air outlet assembly is arranged at the other end of the shell, and an observation assembly is arranged on the shell; the inner wall of the polar plate assembly is coated with carbon nano-functional material. According to the invention, it can also be used as a catalyst to improve the reaction selectivity, promoting the reaction, improving the degradation efficiency of the reactor and saving the energy cost.

Description

LOW-TEMPERATURE PLASMA DEVICE FOR TREATING DIOXIN
TECHNICAL FIELD
The invention relates to the technical field of waste gas treatment of solid waste incineration, and in particular to a low-temperature plasma device for treating dioxin.
BACKGROUND
Plasma is the fourth state of matter which is different from solid, liquid and gas. Matter consists of molecules, molecules consist of atoms, atoms consist of positively charged nuclei and negatively charged electrons surrounding them. When heated to a high enough temperature or other reasons, the outer electrons get rid of nuclei and become free electrons.
When electrons leave the nuclei, this process is called ionization. At this time, the matter becomes a uniform plasma composed of positively charged nuclei and negatively charged electrons. The total amount of positive and negative charges in these plasma is equal, so itis approximately electrically neutral, therefore, it is called plasma.
In the process of material ionization, the degree of material ionization varies according to the distribution of power supply voltage and electric field. Simply put, plasma can be divided into high-temperature plasma and low-temperature plasma. High-temperature plasma has a high temperature, which requires high power supply. Low-temperature plasma has a low temperature, and high-energy electrons move inside. Using the characteristics of high energy and low temperature of low-temperature plasma, molecular bond breaking can be realized, and active free radicals with strong oxidation and reduction can be formed in the reactor. The free radicals interact with Dioxin in waste gas to realize bond breaking of Dioxin, thus achieving the purpose of treating Dioxins in waste gas.
In the prior art, the low-temperature plasma is generated by the discharge of the power supply device, and the waste gas containing pollutants is reacted by the low-temperature plasma device to treat the pollutants.
Conventional low-temperature plasma devices for treating pollutants are mainly divided into the following four systems: gas distribution system, low-temperature plasma discharge generation system, control and analysis system and tail gas absorption system.
Gas distribution system: according to the requirements of pollutant content, it mainly adjusts the flow and concentration of polluted waste gas, and can realize reasonable distribution according to the working conditions of pollution control industry.
Low-temperature plasma discharge generation system: the core system of low-temperature plasma pollutant removal device, which uses different power supplies (DC, pulse, etc.) and different reactors (wire tube, polar plate, etc.) to realize discharge, forming low-temperature plasma, and the waste gas react through the low-temperature plasma to achieve the effect of oxidation treatment/bond breaking decomposition.
Control and analysis system: The main purpose of the control and analysis system is to detect the change of pollutants, treatment effect, plasma parameters, etc. in the process, and achieve the purpose of controlling the whole device.
Tail gas absorption system: the exhaust gas at the outlet of the system is absorbed to ensure that the discharged gas meets the national standard.
The defects of the prior art are as follows:
Firstly, from the aspect of power supply: controlling the formation of stable and uniform low- temperature plasma, it has high requirements for power supply devices, requiring the power supply to meet the requirements of high voltage, stable output, strong anti-interference ability and long service life.
From the aspect of energy consumption: even for low-temperature plasma, in order to ionize the working medium evenly, stably and for a long time, it takes a lot of energy, which further increases the requirements for power supply.
From the aspect of reactor: due to the characteristics of low-temperature plasma with high energy, there is a high requirement for the strength of reactor. During the reaction, the ablation of the electrode and the damage of the wall can not be ignored. At the same time, there are certain requirements for the shape and structure of the reactor to meet the full contact between the plasma and the working medium.
From the aspect of Dioxin treatment: at present, the content of Dioxin in the waste gas from conventional solid waste incineration is microscale or trace, and its properties are stable, so it is difficult to treat Dioxin, and it is difficult for conventional technology to achieve deep purification of Dioxin.
From the aspect of cost: in order to effectively degrade pollutants and meet the above requirements, the cost of the whole device raises.
SUMMARY
The purpose of the present invention is to provide a low-temperature plasma device for treating Dioxin, so as to solve the above problems.
To achieve the above purpose, the present invention provides the following solutions:
A low-temperature plasma device for treating Dioxin, comprises a shell and at least one titanium wire, where the shell has a cylindrical structure, the titanium wire is arranged parallel to the axis of the shell, a polar plate assembly is arranged between the titanium wire and the inner wall of the shell, the length of the titanium wire is not less than that of the polar plate assembly, an air inlet assembly is arranged at one end of the shell, an air outlet assembly is arranged at the other end of the shell, and an observation assembly is arranged on the shell; the inner wall of the polar plate assembly is coated with carbon nano-functional material; an ionization chamber is formed between the titanium wire and the polar plate assembly, for generating plasma to remove Dioxin;
the air inlet assembly is used for feeding incineration waste gas of solid waste, and the air outlet assembly is used for discharging incineration waste gas of solid waste after reaction; the observation assembly is used for observing and detecting the discharge situation in the ionization chamber.
Preferably, the polar plate assembly comprises at least six polar plates, the six polar plates are connected end to end in sequence, and the cross sections of the six polar plate combination structures are regular hexagonal structures.
Preferably, the number of titanium wire is one, and the titanium wire is located on the axis of the shell.
Preferably, the number of titanium wires is six, and the six titanium wires are distributed at equal intervals along the axis of the shell, each titanium wire corresponds to each polar plate one by one.
Preferably, the air inlet assembly comprises an inlet interface provided at one end of the side wall of the shell and a distributable air inlet provided at one end of the side wall of the shell, the inlet interface and the distributable air inlet are located at the same end of the shell.
Preferably, the air outlet assembly comprises an air outlet interface at one end of the other side wall of the shell and a distributable air outlet provided at one end of the other side wall of the shell, and the air outlet interface and the distributable air outlet are located at the same end of the shell.
Preferably, the observation assembly comprises a first observation window and a second observation window arranged in the middle of the shell, a third observation window is arranged at the end of the shell, and the third observation window is located at the end far away from the air inlet assembly, the first observation window, the second observation window and the third observation window are observation windows made of quartz glass.
Preferably, the carbon nano-functional materials are carbon nanotubes, graphene or diamond-like particles.
Preferably, the end of the air inlet assembly of the shell is fixedly connected with an anode connector, one end of the titanium wire is fixedly connected with the anode connector, and the other end of the titanium wire is fixedly connected with the inner wall of the shell.
Preferably, the outer side wall of the shell is fixedly connected with a first bracket and a second bracket, and the bottom ends of the first bracket and the second bracket are flush.
The invention has the following technical effects:
According to the invention, the carbon nano-functional material is plated on the inner wall surface of the polar plate assembly, and the field electron emission effect of the carbon nano- material under high voltage is utilized to promote the formation of low-temperature plasma, strengthening the electron density and energy density in the device; and at the same time, as a catalyst, the reaction selectivity is improved, and finally, the efficiency of the reactor for treating pollutants is improved. So the dioxin removal effect is improved.
A layer of carbon nano-functional material is plated on the inner wall surface of the polar plate assembly, which not only protects the electrode surface from ablation and prolongs the life of the reactor, but also utilizes the field electron emission effect of the carbon nano-functional material to improve the electron density and energy density in the device. It can also be used as a catalyst to improve the reaction selectivity, promoting the reaction, improving the degradation efficiency of the reactor and saving the energy cost.
BRIEF DESCRIPTION OF THE FIGURES
In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without any creative labour.
FIG. 1 is a schematic diagram of the front view structure of the present invention;
FIG. 2 is a schematic diagram of the internal cross-sectional structure of the present invention;
FIG. 3 shows the matching process of the device of the present invention applied in the field of Dioxin pollutant removal;
FIG. 4 is a system schematic diagram of the device of the present invention applied in the field of Dioxin pollutant removal.
Where, 1. inlet interface; 2. outlet interface; 3. first bracket; 4. second bracket; 5. distributable air inlet; 6. distributable air outlet; 7. anode connector; 8. titanium wire; 9. shell; 10. polar plates; 11. first observation window; 12. second observation window; 13. third observation window; 14. valve control system; 15. air inlet device; 16. gas distribution device; 17. gas flowmeter; 18. static mixer; 19. low-temperature plasma device; 20. catalyst adsorption pipe; 21. tail gas absorption device; 22. gas sampling bag; 23. gas chromatograph; 24. tail gas collection device; 25. automatic control system centre; 26. Spectrum analysis system; 27. power control system.
DESCRIPTION OF THE INVENTION
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in the field without creative labour are within the scope of the present invention.
In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be explained in further detail below with reference to the drawings and detailed description.
Embodiment 1:
Referring to FIG. 1-FIG. 3, the embodiment provides a low-temperature plasma device for 5 treating Dioxin, comprises a shell 9 and at least one titanium wire 8, where the shell 9 has a cylindrical structure, the titanium wire 8 is parallel to the axis of the shell 9. A polar plate assembly is arranged between the titanium wire 8 and the inner wall of the shell 9, the length of the titanium wire 8 is not less than that of the polar plate assembly, one end of the shell 9 is provided with an air inlet assembly, the other end of the shell 9 is provided with an air outlet assembly, and the shell 9 is provided with an observation assembly; the inner wall of the polar plate assembly is coated with carbon nano-functional material; an ionization chamber 8 is formed between the titanium wire 8 and the polar plate assembly for generating plasma to remove Dioxin; the air inlet assembly is used for feeding incineration waste gas of solid waste, and the air outlet assembly is used for discharging incineration waste gas of solid waste after reaction; the observation assembly is used for observing and detecting the discharge situation in the ionization chamber.
According to the invention, the titanium wire 8 is used as a high-voltage anode, the shell 9 and the polar plate assembly are used as a low-voltage cathode together, and the function of carbon nano-functional material coating is that in the process of low-temperature plasma discharge, the nano-material on the surface of the low-voltage cathode will form an uneven electric field around due to the point effect, which leads to field electron emission, and a large number of emitted electrons can fill the inside of the device, thus strengthening the energy density of low-temperature plasma discharge, reducing the requirements of low-temperature plasma discharge on power supply performance, and simultaneously, the emitted high-energy electrons can participate in the degradation of pollutants and improve the pollution. In addition, the coating can be used as a catalyst to catalyze the bond breaking of Dioxin, thus improving the selectivity of the reaction. In addition, the coating can protect the cathade from abrasion and ablation, and prolong the service life of the cathode.
In a further optimization scheme, the polar plate assembly comprises at least six polar plates 10, the six polar plates 10 are connected end to end, and the cross sections of the combined structure of the six polar plates 10 are regular hexagonal structures.
In a further optimization scheme, the number of titanium wires 8 is one, and the titanium wire 8 is located on the axis of the shell 9.
In a further optimization scheme, the air inlet assembly comprises an inlet interface 1 provided at one end of the side wall of the shell 9, and a distributable air inlet 5 provided at one end of the side wall of the shell 9. The inlet interface 1 and the distributable air inlet 5 are located at the same end of the shell 9.
The inlet interface 1 of the device is connected with the shell 9 of the device through a flange, which is located at the head end of the device to realize the function of exhaust gas entering. According to the actual working conditions, the function of the distributable air inlet 5 can be adjusted, and the interface can be made of metal or polytetrafluoroethylene.
In a further optimization scheme, the air outlet assembly comprises an air outlet interface 2 at one end of the other side wall of the shell 9 and a distributable air outlet 6 provided at one end of the other side wall of the shell 9, and the air outlet interface 2 and the distributable air outlet 6 are located at the same end of the shell 9.
The outlet interface 2 of the device is connected with the shell 9 of the device through a flange, which is located at the end of the device to realize the function of exhaust gas discharging. According to the actual working conditions, the function of the distributable gas outlet & can be adjusted, and the interface can be made of metal or polytetrafluoroethylene.
In a further optimization scheme, the observation assembly comprises a first observation window 11 and a second observation window 12 arranged in the middle of the shell 9, a third observation window 13 is arranged at the end of the shell 9, and the third observation window 13 is located at the end far away from the air inlet assembly. The first observation window 11, the second observation window 12 and the third observation window 13 are observation windows made of quartz glass.
The first observation window 11, the second observation window 12, and the third observation window 13 are arranged, so that the internal discharge of the reactor can be detected by naked eyes or a spectrum analyser.
In a further optimization scheme, the carbon nano-functional materials are carbon nanotubes, graphene or diamond-like particles. When the carbon nano-functional material coating is damaged due to wear, only a layer of carbon nano-functional material needs to be plated again, which is convenient to repair and prolongs the service life of the device.
In the further optimization scheme, the end of the air inlet assembly of the shell 9 is fixedly connected with an anode connector 7, one end of the titanium wire 8 is fixedly connected with the anode connector 7, and the other end of the titanium wire 8 is fixedly connected with the inner wall of the shell 9.
The anode connector 7 is used for connecting the connector of the high-voltage power supply, and can fix the position of the anode wire.
In the further optimization scheme, the outer side wall of the shell 9 is fixedly connected with the first bracket 3 and the second bracket 4, and the bottom ends of the first bracket 3 and the second bracket 4 are flush.
The first bracket 3 and the second bracket 4 are used for fixing the position and level of the device.
According to the invention, the carbon nano-functional material with electron emission performance is combined with the electrode of the low-temperature plasma device, so that the
Dioxin treatment performance of the device can be improved, the energy consumption of the low-temperature plasma power supply is reduced, and the purpose of protecting the electrode of the device is achieved.
The treatment system applied to the low-temperature plasma device of the present invention includes: a low-temperature plasma device 19; The low-temperature plasma device 19 is used for treating mercury-containing waste gas; an air intake system; the air inlet system is communicated with the air inlet end of the low- temperature plasma device 19, and is used for sending mercury-containing waste gas into the low-temperature plasma device 19; a tail gas treatment system; the tail gas treatment system is communicated with the outlet end of the low-temperature plasma device 19, and is used for absorbing the residual pollutant components in the waste gas treated by the low-temperature plasma device 19 and collecting the tail gas; and an automatic control system; the automatic control system is used for controlling the whole operation of the device.
The automatic control system includes an automatic control system centre 25, a spectrum analysis system 28, a power control system 27 and a valve control system 14, all of which are electrically connected with the automatic control system centre 25; the automatic control system centre 25 intelligently and automatically controls the overall operation of the device based on the PC control system; the spectrum analysis system 26 is used for analysing the changes of groups in the low-temperature plasma device 19 based on the instantaneous spectral imaging technology of ICCD; the power control system 27 is used for controlling the output parameters of power supply; the valve control system 14 is used for controlling the on/off of each gas path valve. The air inlet system includes an air inlet device 15, an gas distribution device 16 and a gas flowmeter 17, both of which are communicated with the gas flowmeter 17, and the gas flowmeter 17 is communicated with the air inlet end of the low-temperature plasma device 19.
The air inlet device 15 is connected in parallel with the gas distribution device 18, and the gas flowmeter 17 is installed between the air inlet device 15 and the gas distribution device 16 and the gas flowmeter 17. The tail gas treatment system comprises a tail gas absorption device 21 and a tail gas collection device 24 sequentially arranged at the outlet end of the low- temperature plasma device 19; the tail gas absorption device 21 is used for absorbing the residual pollutant components in the exhaust gas treated by the low-temperature plasma device 19; the tail gas collection device 24 is used for collecting the gas discharged after being treated by the tail gas absorption device 21. A catalyst adsorption pipe 20 is installed between the tail gas absorption device 21 and the low-temperature plasma device 19, and the catalyst adsorption pipe 20 is filled with mercury ion imprinted environmental protection functional materials for mercury targeted adsorption; the outlet end of the tail gas absorption device 21 is provided with a gas sampling bag 22 and a gas chromatograph 23. The gas sampling bag 22 is used for collecting gas samples from the tail gas absorption device 21 for analysis by the gas chromatograph 23. The gas chromatograph 23 is used for analysing the components in the outlet gas at the end of the tail gas absorption device 21, and analysing the mercury removal ability.
In the treatment system based on the low-temperature plasma device 19 provided by the invention, when in use, the valve control system 14 controls the opening of the air inlet device 15, sends the mercury-containing waste gas into the equipment, and controls the gas distribution device 16 to send the corresponding carrier gas {usually nitrogen or air). In this process, the gas flow rate of each component is detected by gas flowmeter 17. The waste gas and the carrier gas are sent into the gas flowmeter 17 to realize uniform mixing, and then sent into the low-temperature plasma device 19 to react. The power control system 27 controls the power supply to generate low-temperature plasma in the low-temperature plasma device 19.
The power supply parameters: 40KV, voltage: 32-40kv, current: 80-150A, frequency: 800- 1000HZ, pulse width: 450ns and power: 2000 W. During the reaction, the spectrum analysis system 26 is used for analysing the reaction process, and the oxidation mechanism of mercury is analyzed by studying the spectrum change of discharge. The reacted waste gas is sent to the catalyst adsorption pipe 20 to realize the effective adsorption of oxidized divalent mercury in the waste gas, and then sent to the tail gas absorption device 21 to absorb other residual pollutants in the waste gas. The gas sampling bag 22 is used to collect the tail gas at the outlet of the tail gas absorption device 21, and the tail gas is sent to the gas chromatograph 23 for analysis, so as to realize the analysis of mercury oxidation efficiency. The exhaust gas at the end of the whole device is finally sent to the tail gas collection device 24. The whole mercury-containing waste gas treatment system is adjusted and controlled by the automatic control system centre 25.
Embodiment 2:
The low-temperature plasma device of this embodiment differs from the first embodiment only in that, the number of titanium wires 8 is six, and the six titanium wires 8 are distributed at equal intervals along the axis of the shell 9, and each titanium wire 8 corresponds to each polar plate 10 one by one.
In the description of the present invention, it is to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate an orientation or positional relationship based on that shown in the drawings, for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and are therefore not to be construed as limiting the present invention. The above-mentioned embodiments are only for describing the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, various modifications and improvements made to the technical scheme of the present invention by those of ordinary skill in the art should fall within the protection scope determined by the claims of the present invention.

Claims (10)

CONCLUSIESCONCLUSIONS 1. Een lage-temperatuur plasma-inrichting voor het behandelen van dioxine, welke inrichting een behuizing (2) en ten minste een titaniumdraad (8), waarbij — de behuizing (9) een cilindrische structuur heeft, — de titaniumdraad (8) evenwijdig ten opzichte van de as van het omhulsel (9) loopt; — een poolplaatsamenstel is aangebracht tussen de titaniumdraad (8) en de binnenwand van de behuizing (9), — de lengte van de titaniumdraad (8) is niet minder dan die van het poolplaatsamenstel, — het ene uiteinde van de behuizing (9) is voorzien van een luchtinlaatsamenstel, en het andere uiteinde van het omhulsel {9) is voorzien van een luchtuitlaatsamenstel, — de behuizing (9) is voorzien van een observatiesamenstel; — de binnenwand van het poolplaatsamenstel is bekleed met nanokoolstof; — tussen de titaniumdraad (8) en het poolplaatsamenstel een ionisatiekamer (8) is gevormd voor het genereren van plasma om dioxine te verwijderen; — de luchtinlaatsamenstel wordt gebruikt voor de toevoer van verbrandingsafvalgas van vast afval, en het luchtuitlaatsamenstel wordt gebruikt voor de afvoer van verbrandingsafvalgas van vast afval na de reactie; — het observatiesamenstel wordt gebruikt voor het waarnemen en het ontdekken van de afgiftesituatie in de ionisatiekamer.A low-temperature plasma device for treating dioxin, which device comprises a housing (2) and at least one titanium wire (8), wherein - the housing (9) has a cylindrical structure, - the titanium wire (8) is parallel extends relative to the axis of the casing (9); — a pole plate assembly is fitted between the titanium wire (8) and the inner wall of the housing (9), — the length of the titanium wire (8) is not less than that of the pole plate assembly, — one end of the housing (9) is provided with an air inlet assembly, and the other end of the housing {9) is provided with an air outlet assembly, - the housing (9) is provided with an observation assembly; - the inner wall of the pole plate assembly is coated with nanocarbon; - an ionization chamber (8) is formed between the titanium wire (8) and the pole plate assembly for generating plasma to remove dioxin; - the air inlet assembly is used for the supply of combustion waste gas of solid waste, and the air outlet assembly is used for the discharge of combustion waste gas of solid waste after the reaction; - the observation assembly is used for observing and detecting the release situation in the ionization chamber. 2. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij het poolplaatsamenstel ten minste zes poolplaten (10) omvat, waarbij — de zes poolplaten (10) via de uiteinden ervan met elkaar verbonden zijn, en — de doorsneden van de gecombineerde structuur van de zes poolplaten (10) regelmatige zeshoekige structuren zijn.The low temperature plasma dioxin treatment device according to claim 1, wherein the pole plate assembly comprises at least six pole plates (10), wherein - the six pole plates (10) are connected to each other via their ends, and - the cross sections of the combined structure of the six pole plates (10) are regular hexagonal structures. 3. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij — het aantal titaniumdraden (8) een is, en — de titaniumdraad (8) zich op de as van de behuizing (9) bevindt.The low-temperature plasma device for treating dioxin according to claim 1, wherein - the number of titanium wires (8) is one, and - the titanium wire (8) is on the axis of the housing (9). 4. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 2, waarbij — het aantal titaniumdraden (8) zes is, — de zes titaniumdraden (8) op gelijke afstanden langs om as van de behuizing (9) zijn verdeeld, enThe low-temperature plasma device for treating dioxin according to claim 2, wherein - the number of titanium wires (8) is six, - the six titanium wires (8) are equidistantly spaced along the axis of the housing (9) , and — elke titaniumdraad (8) een voor een overeenkomt met elke poolplaat (10).- each titanium wire (8) matches each pole plate (10) one by one. 5. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij — het luchtuitlaatsamenstel een luchtuitlaatinterface (2) omvat aan een uiteinde van de andere zijwand van de behuizing (9), — een verdeelbare luchtuitlaat (6) aan een uiteinde van de andere zijwand van de behuizing (9), en — de luchtuitlaatinterface (2) en de verdeelbare luchtuitlaat (6) bevinden zich aan hetzelfde uiteinde van de behuizing (9).The low-temperature plasma device for treating dioxin according to claim 1, wherein - the air outlet assembly comprises an air outlet interface (2) at one end of the other side wall of the housing (9), - a divisible air outlet (6) at one end of the other side wall of the housing (9), and — the air outlet interface (2) and the divisible air outlet (6) are at the same end of the housing (9). 6. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij — de uitlaatinterface (2) van het toestel verbonden is met de behuizing (8) van het toestel via een flens, die zich aan het uiteinde van het toestel bevindt om de functie van uitlaatgasafvoer te realiseren, — al naar gelang van de werkelijke werkomstandigheden de functie van de uitlaat voor uitlaatgassen (6) kan worden aangepast, en — de interface kan zijn vervaardigd van metaal of polytetrafluorethyleen.The low-temperature plasma device for treating dioxin according to claim 1, wherein - the outlet interface (2) of the device is connected to the housing (8) of the device through a flange located at the end of the device is located to realize the function of exhaust gas discharge, — according to the actual working conditions, the function of the exhaust gas outlet (6) can be adjusted, and — the interface can be made of metal or polytetrafluoroethylene. 7. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij — het observatiesamenstel een eerste observatieraam (11) en een tweede observatieraam (12) omvat, aangebracht in het midden van de behuizing (9), — een derde observatieraam (13) is aangebracht aan het uiteinde van de behuizing (9), waarbij het derde observatieraam (13) zich aan het uiteinde dat van de luchtinlaat af is gelegen bevindt, — het eerste observatieraam (11), het tweede observatieraam (12) en het derde observatieraam (13) observatieramen van kwartsglas zijn.The low-temperature plasma device for treating dioxin according to claim 1, wherein - the observation assembly comprises a first observation window (11) and a second observation window (12) arranged in the center of the housing (9), - a third observation window (13) is arranged at the end of the housing (9), the third observation window (13) being located at the end remote from the air inlet, — the first observation window (11), the second observation window (12 ) and the third observation window (13) are quartz glass observation windows. 8. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij de nanofunctionele koolstofmaterialen koolstofnanobuizen, grafeen of diamantachtige deeltjes zijn.The low-temperature plasma device for treating dioxin according to claim 1, wherein the nanofunctional carbon materials are carbon nanotubes, graphene or diamond-like particles. 9. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij — het uiteinde van het luchtinlaatsamenestel van de behuizing (9) vast verbonden is met een anodeconnector (7),The low-temperature plasma device for treating dioxin according to claim 1, wherein - the end of the air inlet assembly of the housing (9) is fixedly connected to an anode connector (7), — het ene uiteinde van de titaniumdraad (8) vast verbonden is met de anodeconnector (7), en — het andere uiteinde van de titaniumdraad (8) vast verbonden is met de binnenwand van de behuizing (9).- one end of the titanium wire (8) is firmly connected to the anode connector (7), and - the other end of the titanium wire (8) is firmly connected to the inner wall of the housing (9). 10. Het lage-temperatuur plasma-inrichting voor het behandelen van dioxine volgens conclusie 1, waarbij — de buitenwand van de behuizing (9) vast verbonden is met een eerste steun (3) en een tweede steun (4), en — de onderkant van de eerste steun (3) en de tweede steun (4) tegen elkaar aan liggen.The low-temperature plasma device for treating dioxin according to claim 1, wherein - the outer wall of the housing (9) is fixedly connected to a first support (3) and a second support (4), and - the bottom of the first support (3) and the second support (4) lie against each other.
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