CN111679006A - Plasma secondary degradation performance analysis system and analysis method - Google Patents
Plasma secondary degradation performance analysis system and analysis method Download PDFInfo
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- CN111679006A CN111679006A CN202010545402.5A CN202010545402A CN111679006A CN 111679006 A CN111679006 A CN 111679006A CN 202010545402 A CN202010545402 A CN 202010545402A CN 111679006 A CN111679006 A CN 111679006A
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- 230000015556 catabolic process Effects 0.000 title claims abstract description 54
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 54
- 238000004458 analytical method Methods 0.000 title claims abstract description 26
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000008096 xylene Substances 0.000 claims abstract description 29
- 230000005587 bubbling Effects 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 86
- 238000010438 heat treatment Methods 0.000 claims description 50
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 27
- 239000003546 flue gas Substances 0.000 claims description 27
- 239000000047 product Substances 0.000 claims description 14
- 239000013067 intermediate product Substances 0.000 claims description 8
- 238000004445 quantitative analysis Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000004451 qualitative analysis Methods 0.000 claims description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 6
- 239000012855 volatile organic compound Substances 0.000 abstract description 6
- 239000003989 dielectric material Substances 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 210000002381 plasma Anatomy 0.000 description 45
- 230000017525 heat dissipation Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
Abstract
The invention relates to a plasma secondary degradation performance analysis system, which is characterized in that: the system comprises an air pump, a rotor flow meter, a water bath, a bubbling bottle, a first ionization discharge device, an oscilloscope, a buffer tank, a second ionization discharge device, an organic gas detector, a gas chromatograph-mass spectrometer and a TOC analyzer; on the premise of not adding a catalyst and not coupling with other technologies, strong ionization discharge is realized by changing a discharge gap and optimizing a dielectric material, the treatment efficiency of the low-temperature plasma for high-concentration VOCs is effectively improved, and meanwhile, through the adjustment of the discharge gap and the thickness of the dielectric layer, a user can conveniently know the degradation efficiency of different products in the xylene treatment process so as to give a corresponding degradation suggestion, so that the research of the low-temperature plasma technology on the typical xylene degradation performance of an organic solvent in industrial production is effectively perfected.
Description
Technical Field
The invention relates to the technical field of plasma degradation performance, in particular to a plasma secondary degradation performance analysis system and method.
Background
The existing low-temperature plasma waste gas treatment technology generally has the defects that the energy consumption is high, the removal efficiency is low when medium-high concentration VOCs are treated, toxic and harmful intermediate products are possibly generated in the treatment process, certain compounds generate polymerization reaction in a low-temperature plasma environment, coking is deposited on electrodes or walls of the devices, and equipment ignition and the like are caused when the coking is accumulated to a certain degree.
In order to improve the energy efficiency of low-temperature plasma and the mineralization degree of pollutants, the prior art has adopted a method of filling materials such as catalysts, adsorbents, ferroelectric materials and the like in a plasma reactor to improve the mineralization degree of pollutants by the low-temperature plasma technology, but the filling materials lose effect after being used for a period of time, and need to be replaced or regenerated, so that the cost is increased and secondary pollution is caused. Therefore, the low-temperature plasma technology is combined with other VOCs treatment technologies to become a new direction for the development of the low-temperature plasma technology.
Due to the process characteristic of narrow discharge gaps in the technology of generating plasmas in the strong discharge ionization environment, the degradation effect is reduced when VOCs with larger flow are treated. Therefore, it is desirable to combine the strong ionization discharge plasma technology with the pulsed corona discharge plasma technology to obtain an economically applicable technology capable of handling large air volume VOCs. And the research on the xylene degradation performance by the strong ionization discharge plasma technology and the pulse corona discharge plasma technology is not complete.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides a plasma secondary degradation performance analysis system and a plasma secondary degradation performance analysis method.
The technical scheme of the invention is as follows:
a plasma secondary degradation performance analysis system is characterized in that: the system comprises an air pump, a rotor flow meter, a water bath, a bubbling bottle, a first ionization discharge device, an oscilloscope, a buffer tank, a second ionization discharge device, an organic gas detector, a gas chromatograph-mass spectrometer and a TOC analyzer; wherein the content of the first and second substances,
the inlet of the air pump is communicated with external air, and the outlet of the air pump is connected with the inlet of the rotor flow meter;
the outlet of the rotameter comprises a first airflow guide pipe and a second airflow guide pipe, wherein the first airflow guide pipe is connected with the outlet of the rotameter and the inlet of the first ionization discharge device, the second airflow guide pipe extends into the air inlet of a bubbling bottle filled with a dimethylbenzene solution and is positioned below the liquid level, and the side air outlet of the bubbling bottle is connected with the inlet of the buffer tank;
the bubbling bottle is placed in a constant temperature environment in a water bath kettle;
the first ionization discharge device is connected with an oscilloscope, and an outlet of the first ionization discharge device is connected with an inlet of the buffer tank;
an outlet of the buffer tank is connected with an inlet of a second ionization discharge device, and an inlet and an outlet of the second ionization discharge device are respectively connected with an organic gas detector;
and the outlet of the second ionization discharge device is respectively connected with the gas chromatograph, the gas chromatograph-mass spectrometer and the TOC analyzer.
Further, the rotameter includes a first flow meter and a second flow meter, the first flow meter controls the flow rate and flow rate of air from the air pump into the first air flow conduit, and the second flow meter controls the flow rate and flow rate of air from the air pump into the second air flow conduit.
Further, the outer wall of first air current pipe and second air current pipe is provided with flue gas heating control system, flue gas heating control system includes temperature sensor, temperature controller and heating tape, and the heating tape is fixed the circumference outer wall of laying first air current pipe and second air current pipe with the winding mode, and temperature sensor detects the inside ambient temperature of pipe in real time, and when the inside ambient temperature of pipe was less than the inside predetermined temperature threshold value lower limit value of temperature controller, temperature controller realized the heating to first air current pipe and second air current pipe through the heating tape, and when the inside ambient temperature of pipe was higher than the inside predetermined temperature threshold value upper limit value of temperature controller, temperature controller stopped the heating to first air current pipe and second air current pipe through the heating tape.
Furthermore, the first ionization discharge device is respectively connected with a first high-frequency high-voltage power supply and a first external power supply, and a first voltmeter is connected with the first high-frequency high-voltage power supply to detect the output voltage of the first high-frequency high-voltage power supply in real time; the second ionization discharge device is respectively connected with a second high-frequency high-voltage power supply and a second external power supply, and a second voltmeter is connected with the second high-frequency high-voltage power supply to detect the output voltage of the second high-frequency high-voltage power supply in real time.
Further, the buffer tank is connected with a flue gas heating device and a water vapor regulating device, when the ambient temperature inside the buffer tank is lower than the lower limit value of a preset temperature threshold value, the flue gas heating device heats the buffer tank, and when the ambient temperature inside the buffer tank is higher than the upper limit value of the preset temperature threshold value, the flue gas heating device stops heating the buffer tank; when the inside ambient humidity of buffer tank is less than preset humidity threshold value lower limit value or is higher than preset humidity threshold value upper limit value, the inside humidity of buffer tank is adjusted to steam adjusting device, and when the inside ambient humidity of buffer tank reached preset humidity threshold value within range, flue gas heating device stopped adjusting the humidity of buffer tank.
Further, the first ionization discharge device and the second ionization discharge device respectively comprise a plasma generation device, a heat dissipation fin and a heat dissipation fan, wherein the black heat dissipation fin is arranged on the rectangular outer wall of the plasma generation device in a surrounding mode, the heat dissipation fan is arranged on one side of the plasma generation device, a discharge electrode of the plasma generation device is made of sintered metal silver, and a dielectric layer is sprayed on the outer surface of the discharge electrode.
Further, the discharge gap of the plasma generating device can be adjusted.
Further, the thickness of the dielectric layer sprayed on the outer surface of the discharge electrode of the plasma generating device can be adjusted.
Further, the organic gas detector at least comprises an ozone analyzer, a flue gas analyzer and a CO/CO2 measuring instrument, so as to respectively determine corresponding relations between the O3 yield, the NOx yield and the CO/CO2 yield and the input voltage and the input power; the TOC analyzer and the gas chromatograph perform quantitative analysis on the reacted products; the gas chromatograph and the gas chromatograph-mass spectrometer are used for detecting and qualitatively analyzing the intermediate products of the reaction.
Further, the invention also provides a plasma secondary degradation performance analysis method, which is characterized by comprising the following steps: the method comprises the following steps:
1) starting an air pump to pump air;
2) the rotor flow meter respectively controls the air flow rate and the air flow rate entering the first airflow guide pipe and the second airflow guide pipe according to the preset flow rate;
3) air in the first airflow duct is heated by the heating belt and then directly introduced into the first ionization discharge device; air in the second air flow guide pipe is heated by the heating belt and then is continuously introduced into a bubbling bottle arranged in the water bath kettle, and a dimethylbenzene solution in the bubbling bottle is accelerated to volatilize under the action of bubbling and aerodynamic force, enters the buffer tank along with the air and is mixed with mixed gas treated by the first ionization discharge device in the buffer tank;
4) the mixed gas in the buffer tank enters a second ionization discharge device, is processed by plasma generated by strong ionization discharge under high frequency and high voltage provided by a high frequency and high voltage power supply, and the corresponding relation between the O3 output, the NOx output and the CO/CO2 output and input parameters in the mixed gas after the first ionization discharge processing and the second ionization discharge processing is detected in real time by an organic gas detector; carrying out quantitative analysis on the reacted product through a TOC analyzer and a gas chromatograph, and carrying out detection and qualitative analysis on the reacted intermediate product through the gas chromatograph and a mass spectrometer;
5) adjusting the discharge gap of a plasma generating device of the strong ionization discharge device and the thickness of a dielectric layer sprayed on the outer surface of a discharge electrode respectively, so as to determine the influence of the thickness of the dielectric layer sprayed on the outer surface of the discharge electrode and the different discharge gaps on the type and quality of a product under the same input environment;
6) and forming corresponding degradation suggestions according to the corresponding analysis results.
Compared with the prior art, the invention has the following beneficial effects:
1) on the premise of not adding a catalyst and not coupling with other technologies, strong ionization discharge is realized by changing a discharge gap and optimizing a dielectric material, the treatment efficiency of the low-temperature plasma for high-concentration VOCs is effectively improved, and meanwhile, through the adjustment of the discharge gap and the thickness of the dielectric layer, a user can conveniently know the degradation efficiency of different products in the xylene treatment process so as to give a corresponding degradation suggestion, so that the research of the low-temperature plasma technology on the typical xylene degradation performance of an organic solvent in industrial production is effectively perfected.
2) Respectively adopting an ozone analyzer, a flue gas analyzer and a CO/CO2 measuring instrument to respectively determine corresponding relations between O3 yield, NOX yield and CO/CO2 yield and input voltage and input power for the mixed gas treated by the strong ionization discharge device; the products after the reaction are subjected to quantitative analysis through a TOC analyzer and a gas chromatograph, the intermediate products of the reaction are subjected to detection and qualitative analysis through the gas chromatograph and a mass spectrometer, and corresponding degradation suggestions are formed according to corresponding analysis results, so that a new guidance direction is provided for the xylene degradation by adopting low-temperature plasma in the future.
3) The influence of the xylene gas with different concentrations on the degradation efficiency can be determined through the flow and flow rate control of the rotor flowmeter, the first airflow guide pipe and the second airflow guide pipe; through the secondary degradation of different ionization discharge devices, the influence of the ionization discharge devices of different material dielectric layers on the degradation efficiency of the xylene gas can be determined; the influence of high-frequency voltage on the degradation efficiency of the xylene gas under different input parameters can be determined through the arrangement of a voltmeter and an oscilloscope; the influence of different discharge gaps and dielectric material layer thicknesses on the xylene gas degradation efficiency under the same input parameters can be determined by adjusting the discharge gaps and the dielectric material layer thicknesses.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and will therefore make the scope of the invention more clearly and clearly defined.
The technical scheme provided by the invention is as follows:
a plasma secondary degradation performance analysis system comprises an air pump 1, a rotor flow meter 2, a water bath 3, a bubble bottle 4, a first ionization discharge device 5, an oscilloscope 6, a buffer tank 7, a second ionization discharge device 8, an organic gas detector 9, a gas chromatograph 10, a gas chromatograph-mass spectrometer 11 and a TOC analyzer 12; wherein the content of the first and second substances,
the inlet of the air pump 1 is communicated with external air, and the outlet of the air pump 1 is connected with the inlet of the rotor flow meter 2; pumping external air into the analytical system by an air pump;
the outlet of the rotameter 2 comprises a first gas flow conduit L1 and a second gas flow conduit L2, wherein the first gas flow conduit L1 is connected with the outlet of the rotameter 2 and the inlet of the first ionization discharge device 5, the second gas flow conduit L2 extends into the gas inlet of the bubbling bottle 4 filled with the xylene solution and is positioned below the liquid level, and the side gas outlet of the bubbling bottle 4 is connected with the inlet of the buffer tank 7; the first gas flow conduit L1 introduces air for diluting xylene gas into the first ionization discharge device 5, the second gas flow conduit L2 introduces xylene gas generated under the bubbling action into the buffer tank 7, and the air flow and the flow rate entering the first gas flow conduit L1 and the second gas flow conduit L2 can be controlled through the rotameter 2, so that the concentration of xylene in the mixed gas can be effectively adjusted; the influence of the xylene gas with different concentrations on the degradation efficiency can be obtained by keeping other conditions unchanged;
the bubbling bottle 4 is placed in a constant temperature environment in the water bath 3; to ensure the stability and effectiveness of bubbling, and thus the uniform speed and stability of the volatilized xylene gas entering the buffer tank through the second gas flow conduit L2, preferably, the temperature of the constant temperature environment in the water bath 3 is kept at 25 ℃ ± 1 ℃;
the first ionization discharge device 5 is connected with an oscilloscope 6, and the outlet of the first ionization discharge device 5 is connected with the inlet of a buffer tank 7; the oscilloscope 6 correspondingly displays and records the power parameters and waveforms provided by the first high-frequency high-voltage power supply and the first external power supply to the first ionization discharge device; the buffer tank 7 is used for slowing down the gas flow rate, so that the mixed air treated by the first ionization discharge device can be fully mixed with the xylene gas, and can more gently and accurately flow into the second ionization discharge device 8 for further reaction; the influence of different voltage input conditions on the degradation efficiency of the xylene gas can be obtained by keeping other conditions unchanged, namely the waveform of the oscilloscope 6;
an outlet of the buffer tank 7 is connected with an inlet of a second ionization discharge device 8, and an inlet and an outlet of the second ionization discharge device 8 are respectively connected with an organic gas detector 9; therefore, the components and the content of the mixed gas such as O3, NOx, CO/CO2 and the like before and after entering the second ionization discharge device 8 can be effectively detected;
the outlet of the second ionization discharge device 8 is respectively connected with a gas chromatograph 10, a gas chromatograph-mass spectrometer 11 and a TOC analyzer 12, so that the products of the xylene after treatment are respectively subjected to quantitative and qualitative analysis.
Specifically, the first flowmeter 2-1 and the second flowmeter 2-2 are included in the rotameter 2, the first flowmeter 2-1 controls the air flow and the flow rate from the air pump 1 into the first air flow conduit L1, and the second flowmeter 2-2 controls the air flow and the flow rate from the air pump 1 into the second air flow conduit L2, so that the flow rate and the flow rate of the xylene gas into the first ionization discharge device 5 and the concentration of the xylene gas into the buffer tank 7 can be effectively adjusted.
Specifically, the outer walls of the first airflow duct L1 and the second airflow duct L2 are provided with a flue gas heating control system, the flue gas heating control system comprises a temperature sensor, a temperature controller and a heating belt, the heating belt is fixedly arranged on the circumferential outer walls of the first airflow duct L1 and the second airflow duct L2 in a winding manner, the temperature sensor detects the ambient temperature inside the ducts in real time, when the ambient temperature inside the ducts is lower than the lower limit value of the temperature threshold preset inside the temperature controller, the temperature controller heats the first airflow duct L1 and the second airflow duct L2 through the heating belt, and when the ambient temperature inside the ducts is higher than the upper limit value of the temperature threshold preset inside the temperature controller, the temperature controller stops heating the first airflow duct L1 and the second airflow duct L2 through the heating belt; the uniformity and stability of bubbling are effectively ensured, so that the dimethylbenzene gas continuously volatilizes and stably enters the buffer tank 7 at a constant speed, and the integral stability of the mixed gas entering the first ionization discharge device 5 and participating in the reaction can be effectively ensured.
Specifically, the first ionization discharge device 5 is respectively connected with a first high-frequency high-voltage power supply 5-1 and a first external power supply 5-3, and a first voltmeter 5-2 is connected with the first high-frequency high-voltage power supply 5-1 to detect the output voltage of the first high-frequency high-voltage power supply 5-1 in real time; the second ionization discharge device 8 is respectively connected with a second high-frequency high-voltage power supply 8-1 and a second external power supply 8-3, a second voltmeter 8-2 is connected with the second high-frequency high-voltage power supply 8-1 to detect the output voltage of the second high-frequency high-voltage power supply 8-1 in real time, the external power supply provides normal working voltage, and the high-frequency high-voltage power supply provides ionization discharge voltage.
Specifically, the buffer tank 7 is connected with a flue gas heating device and a water vapor regulating device, when the ambient temperature inside the buffer tank is lower than the lower limit value of a preset temperature threshold, the flue gas heating device heats the buffer tank, and when the ambient temperature inside the buffer tank is higher than the upper limit value of the preset temperature threshold, the flue gas heating device stops heating the buffer tank; when the inside ambient humidity of buffer tank is less than predetermined humidity threshold value lower limit value or is higher than predetermined humidity threshold value upper limit value, the inside humidity of buffer tank is adjusted to steam adjusting device, and when the inside ambient humidity of buffer tank reached predetermined humidity threshold value within range, flue gas heating device stopped adjusting the humidity of buffer tank to realize the regulation to 7 inside temperature of buffer tank and humidity through flue gas heating device and steam adjusting device respectively.
Preferably, the flue gas heating device and the steam adjusting device of the buffer tank 7 are turned on before the flue gas heating control system disposed on the outer walls of the first air flow duct L1 and the second air flow duct L2 and turned off after the flue gas heating control system disposed on the outer walls of the first air flow duct L1 and the second air flow duct L2 are turned off, so that even when the flue gas heating control systems disposed on the outer walls of the first air flow duct L1 and the second air flow duct L2 are not turned on or turned off, the mixed gas remaining inside the first air flow duct L1 and the second air flow duct L2 and then entering the buffer tank 7 can be adjusted in temperature and humidity by the flue gas heating device and the steam adjusting device of the buffer tank 7.
Specifically, the first ionization discharge device 5 and the second ionization discharge device 8 respectively include a plasma generation device, a heat sink, and a heat dissipation fan, a black heat sink is disposed around a rectangular outer wall of the plasma generation device, heat dissipation of an internal environment of the plasma generation device is effectively achieved through the arrangement of the heat sink and the heat dissipation fan, the heat dissipation fan is disposed at one side of the plasma generation device, a discharge electrode of the plasma generation device is made of sintered metallic silver, and a dielectric layer is sprayed on an outer surface of the discharge electrode. The degradation effect on xylene gas can be observed by spraying dielectric layers of different materials in the first ionization discharge device 5 and the second ionization discharge device 8.
Specifically, the discharge gap of the plasma generating device can be adjusted. Therefore, through different discharge gaps, a user can know the degradation efficiency of different products in the xylene treatment process conveniently so as to give a corresponding degradation suggestion, and the user can conveniently adopt the most effective degradation measure to realize high-efficiency degradation aiming at the xylene degradation environment under the same condition; preferably, the adjustment of the different discharge gaps can be realized by providing corresponding adjustment means on the plasma-generating device.
Specifically, the thickness of the dielectric layer sprayed on the outer surface of the discharge electrode of the plasma generating device can be adjusted. Therefore, through the thicknesses of the different dielectric layers, a user can know the degradation efficiency of different products in the xylene treatment process conveniently so as to give a corresponding degradation suggestion, and the user can conveniently adopt the most effective degradation measure to realize high-efficiency degradation aiming at the xylene degradation environment under the same condition; preferably, the thickness adjustment of the different dielectric layers can be realized by replacing the discharge electrodes of the plasma generating device for spraying the dielectric layers with different thicknesses.
Preferably, when the thicknesses of the dielectric layer sprayed on the outer surfaces of the discharge gap of the plasma generator and the discharge electrode of the plasma generator are adjusted, the thicknesses can be respectively and independently adjusted to observe the independent influence of the thicknesses of the discharge gap and the dielectric layer on the xylene degradation efficiency, or the thicknesses of the discharge gap and the dielectric layer can be simultaneously adjusted to observe whether the thicknesses of the discharge gap and the dielectric layer have interference influence on the xylene degradation efficiency; during simultaneous adjustment, the adjustment priority of the discharge gap is prior to the adjustment priority of the thickness of the dielectric layer, so that parameter interference caused by adjustment of the discharge gap when the discharge electrode of the plasma generating device with the dielectric layers with different spraying thicknesses is replaced is avoided.
Specifically, the organic gas detector 9 at least includes an ozone analyzer, a flue gas analyzer and a CO/CO2 measuring instrument to respectively determine the corresponding relations between the corresponding O3 yield, NOX yield and CO/CO2 yield and the input voltage and input power; the TOC analyzer 13 and the gas chromatograph 11 perform quantitative analysis on the reacted products; the gas chromatograph 11 and the gas chromatograph 12 detect and qualitatively analyze the intermediate products of the reaction.
Specifically, the invention also provides a plasma secondary degradation performance analysis method, which comprises the following steps:
1) starting an air pump to pump air;
2) the rotor flow meter respectively controls the air flow rate and the air flow rate entering the first airflow guide pipe and the second airflow guide pipe according to the preset flow rate;
3) air in the first airflow duct is heated by the heating belt and then directly introduced into the first ionization discharge device; air in the second air flow guide pipe is heated by the heating belt and then is continuously introduced into a bubbling bottle arranged in the water bath kettle, and a dimethylbenzene solution in the bubbling bottle is accelerated to volatilize under the action of bubbling and aerodynamic force, enters the buffer tank along with the air and is mixed with mixed gas treated by the first ionization discharge device in the buffer tank;
4) the mixed gas in the buffer tank enters a second ionization discharge device, is processed by plasma generated by strong ionization discharge under high frequency and high voltage provided by a high frequency and high voltage power supply, and the corresponding relation between the O3 output, the NOx output and the CO/CO2 output and input parameters in the mixed gas after the first ionization discharge processing and the second ionization discharge processing is detected in real time by an organic gas detector; carrying out quantitative analysis on the reacted product through a TOC analyzer and a gas chromatograph, and carrying out detection and qualitative analysis on the reacted intermediate product through the gas chromatograph and a mass spectrometer;
5) adjusting the discharge gap of a plasma generating device of the strong ionization discharge device and the thickness of a dielectric layer sprayed on the outer surface of a discharge electrode respectively, so as to determine the influence of the thickness of the dielectric layer sprayed on the outer surface of the discharge electrode and the different discharge gaps on the type and quality of a product under the same input environment;
6) and forming corresponding degradation suggestions according to the corresponding analysis results.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A plasma secondary degradation performance analysis system is characterized in that: the system comprises an air pump (1), a rotor flow meter (2), a water bath (3), a bubbling bottle (4), a first ionization discharge device (5), an oscilloscope (6), a buffer tank (7), a second ionization discharge device (8), an organic gas detector (9), a gas chromatograph (10), a gas chromatograph-mass spectrometer (11) and a TOC analyzer (12); wherein the content of the first and second substances,
the inlet of the air pump (1) is communicated with external air, and the outlet of the air pump (1) is connected with the inlet of the rotor flow meter (2);
the outlet of the rotameter (2) comprises a first gas flow conduit (L1) and a second gas flow conduit (L2), wherein the first gas flow conduit (L1) is connected with the outlet of the rotameter (2) and the inlet of the first ionization discharge device (5), the second gas flow conduit (L2) extends into the gas inlet of a bubbling bottle (4) filled with xylene solution and is positioned below the liquid level, and the side gas outlet of the bubbling bottle (4) is connected with the inlet of the buffer tank (7);
the bubbling bottle (4) is placed in a constant temperature environment in the water bath (3);
the first ionization discharge device (5) is connected with an oscilloscope (6), and an outlet of the first ionization discharge device (5) is connected with an inlet of a buffer tank (7);
an outlet of the buffer tank (5) is connected with an inlet of a second ionization discharge device (8), and an inlet and an outlet of the second ionization discharge device (8) are respectively connected with an organic gas detector (9);
and the outlet of the second ionization discharge device (8) is respectively connected with a gas chromatograph (10), a gas chromatograph-mass spectrometer (11) and a TOC analyzer (12).
2. The plasma secondary degradation performance analysis system of claim 1, wherein: the rotameter (2) comprises a first flowmeter (2-1) and a second flowmeter (2-2), the first flowmeter (2-1) controls the air flow and the flow rate from the air pump (1) to the first air flow conduit (L1), and the second flowmeter (2-2) controls the air flow and the flow rate from the air pump (1) to the second air flow conduit (L2).
3. The plasma secondary degradation performance analysis system of claim 1, wherein: first air current pipe (L1) is provided with flue gas heating control system with the outer wall of second air current pipe (L2), flue gas heating control system includes temperature sensor, temperature controller and heating tape, and the heating tape is fixed to be laid in the circumference outer wall of first air current pipe (L1) and second air current pipe (L2) with winding mode, and the inside ambient temperature of temperature sensor real-time detection pipe, when the inside ambient temperature of pipe is less than the inside predetermined temperature threshold value lower limit value of temperature controller, temperature controller realizes the heating to first air current pipe (L1) and second air current pipe (L2) through the heating tape, when the inside ambient temperature of pipe is higher than the inside predetermined temperature threshold value upper limit value of temperature controller, temperature controller stops the heating to first air current pipe (L1) and second air current pipe (L2) through the heating tape.
4. The plasma secondary degradation performance analysis system of claim 1, wherein: the first ionization discharge device (5) is respectively connected with a first high-frequency high-voltage power supply (5-1) and a first external power supply (5-3), and a first voltmeter (5-2) is connected with the first high-frequency high-voltage power supply (5-1) to detect the output voltage of the first high-frequency high-voltage power supply (5-1) in real time; the second ionization discharge device (8) is respectively connected with a second high-frequency high-voltage power supply (8-1) and a second external power supply (8-3), and a second voltmeter (8-2) is connected with the second high-frequency high-voltage power supply (8-1) to detect the output voltage of the second high-frequency high-voltage power supply (8-1) in real time.
5. The plasma secondary degradation performance analysis system of claim 1, wherein: the buffer tank (7) is connected with a flue gas heating device and a water vapor regulating device, when the ambient temperature in the buffer tank is lower than the lower limit value of a preset temperature threshold value, the flue gas heating device heats the buffer tank, and when the ambient temperature in the buffer tank is higher than the upper limit value of the preset temperature threshold value, the flue gas heating device stops heating the buffer tank; when the inside ambient humidity of buffer tank is less than preset humidity threshold value lower limit value or is higher than preset humidity threshold value upper limit value, the inside humidity of buffer tank is adjusted to steam adjusting device, and when the inside ambient humidity of buffer tank reached preset humidity threshold value within range, flue gas heating device stopped adjusting the humidity of buffer tank.
6. The plasma secondary degradation performance analysis system of claim 1, wherein: the first ionization discharge device (5) and the second ionization discharge device (8) respectively comprise a plasma generating device, a radiating fin and a radiating fan, wherein the black radiating fin is arranged on the rectangular outer wall of the plasma generating device in a surrounding mode, the radiating fan is arranged on one side of the plasma generating device, a discharge electrode of the plasma generating device is made of sintered metal silver, and a dielectric layer is sprayed on the outer surface of the discharge electrode.
7. The plasma secondary degradation performance analysis system of claim 6, wherein: the discharge gap of the plasma generating device can be adjusted.
8. The plasma secondary degradation performance analysis system of claim 6, wherein: the thickness of the dielectric layer sprayed on the outer surface of the discharge electrode of the plasma generating device can be adjusted.
9. The plasma secondary degradation performance analysis system of claim 1, wherein: the organic gas detector (9) at least comprises an ozone analyzer and a smokeGas analyzer and CO/CO2Meters to respectively determine corresponding O3Yield, NOXYield and CO/CO2The corresponding relation between the output and the input voltage and the input power; the TOC analyzer (13) and the gas chromatograph (11) perform quantitative analysis on the reacted products; the gas chromatograph (11) and the gas chromatograph-mass spectrometer (12) detect and qualitatively analyze the intermediate products of the reaction.
10. A plasma secondary degradation performance analysis method is characterized by comprising the following steps: the method comprises the following steps:
1) starting an air pump to pump air;
2) the rotor flow meter respectively controls the air flow rate and the air flow rate entering the first airflow guide pipe and the second airflow guide pipe according to the preset flow rate;
3) air in the first airflow duct is heated by the heating belt and then directly introduced into the first ionization discharge device; air in the second air flow guide pipe is heated by the heating belt and then is continuously introduced into a bubbling bottle arranged in the water bath kettle, and a dimethylbenzene solution in the bubbling bottle is accelerated to volatilize under the action of bubbling and aerodynamic force, enters the buffer tank along with the air and is mixed with mixed gas treated by the first ionization discharge device in the buffer tank;
4) the mixed gas in the buffer tank enters a second ionization discharge device, is processed by plasma generated by strong ionization discharge under high frequency and high voltage provided by a high frequency and high voltage power supply, and the corresponding relation between the O3 output, the NOx output and the CO/CO2 output and input parameters in the mixed gas after the first ionization discharge processing and the second ionization discharge processing is detected in real time by an organic gas detector; carrying out quantitative analysis on the reacted product through a TOC analyzer and a gas chromatograph, and carrying out detection and qualitative analysis on the reacted intermediate product through the gas chromatograph and a mass spectrometer;
5) adjusting the discharge gap of a plasma generating device of the strong ionization discharge device and the thickness of a dielectric layer sprayed on the outer surface of a discharge electrode respectively, so as to determine the influence of the thickness of the dielectric layer sprayed on the outer surface of the discharge electrode and the different discharge gaps on the type and quality of a product under the same input environment;
6) and forming corresponding degradation suggestions according to the corresponding analysis results.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621743A (en) * | 2003-11-26 | 2005-06-01 | 中国科学院力学研究所 | Plasma multi-stage cracking technology and apparatus capable of processing multiple organic wastes simultaneously |
| CN105864908A (en) * | 2016-04-15 | 2016-08-17 | 北京化工大学 | Multistage plasma air purifier |
| CN106492601A (en) * | 2016-12-23 | 2017-03-15 | 厦门大学 | A kind of pouring-in simultaneous SO_2 and NO removal method for removing hydrargyrum |
| CN206924604U (en) * | 2017-04-24 | 2018-01-26 | 上海电力学院 | The experimental provision of object gas is catalytically decomposed in low temperature plasma |
| CN108355469A (en) * | 2017-12-04 | 2018-08-03 | 北京世纪星光环保科技有限公司 | A kind of method of two-part plasmon coupling deep purifying food and drink exhaust gas |
-
2020
- 2020-06-15 CN CN202010545402.5A patent/CN111679006A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621743A (en) * | 2003-11-26 | 2005-06-01 | 中国科学院力学研究所 | Plasma multi-stage cracking technology and apparatus capable of processing multiple organic wastes simultaneously |
| CN105864908A (en) * | 2016-04-15 | 2016-08-17 | 北京化工大学 | Multistage plasma air purifier |
| CN106492601A (en) * | 2016-12-23 | 2017-03-15 | 厦门大学 | A kind of pouring-in simultaneous SO_2 and NO removal method for removing hydrargyrum |
| CN206924604U (en) * | 2017-04-24 | 2018-01-26 | 上海电力学院 | The experimental provision of object gas is catalytically decomposed in low temperature plasma |
| CN108355469A (en) * | 2017-12-04 | 2018-08-03 | 北京世纪星光环保科技有限公司 | A kind of method of two-part plasmon coupling deep purifying food and drink exhaust gas |
Non-Patent Citations (2)
| Title |
|---|
| 冯景伟等: "介质阻挡放电对水中敌草隆的降解研究", 《环境化学》 * |
| 李珏: "强电离放电等离子体降解乙酸乙酯试验研究", 《中国知网硕士电子期刊》 * |
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