CN107715662A - A kind of flow direction conversion plasma device and method for VOCs processing - Google Patents
A kind of flow direction conversion plasma device and method for VOCs processing Download PDFInfo
- Publication number
- CN107715662A CN107715662A CN201711009182.9A CN201711009182A CN107715662A CN 107715662 A CN107715662 A CN 107715662A CN 201711009182 A CN201711009182 A CN 201711009182A CN 107715662 A CN107715662 A CN 107715662A
- Authority
- CN
- China
- Prior art keywords
- plasma generator
- plasma
- gas
- reactor
- flow direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
A kind of flow direction conversion plasma device and method for VOCs processing, it is related to plasma technique and flows to converter technique field.Including plasma generator and gas piping and magnetic valve.Plasma generator is dielectric barrier discharge plasma generator, and reactor material is quartz.It is high-pressure stage from tungsten filament, quartz ampoule center is fixed on using insulating plug, the stainless steel wire for being wrapped in reactor outer wall is earthing pole.The heat accumulating sections of region of discharge both sides are placed with cordierite as heat storage, put six pieces per side, outside is tied with heat-preservation cotton.Magnetic valve controls the direction of air current flow, caused accumulation of heat in course of reaction is got up, by air current flow, heat is largely focused on region of discharge, can so effectively improve the degradation rate of VOCs pollutants and effectively reduce energy consumption in course of reaction.
Description
Technical field
The present invention relates to plasma technique and flow to converter technique field, there is provided a kind of flow direction for VOCs processing becomes
Change plasma device and method.
Background technology
In recent years, low temperature plasma is commonly used in processing VOC VOCs (Volatile Organic
Compounds) in terms of waste gas.And because single plasma technique is bad to VOCs treatment effects, therefore to VOCs waste gas
The research of plasma joint processing technology turns into the focus studied both at home and abroad.And these technologies be nearly all by low temperature etc. from
Daughter is combined with catalysis technique, by being combined with different catalysts further to decompose organic exhaust gas.Guo's book is clear etc. to be have studied
During independent action of plasma, removal initial concentration is 600mg/m3Toluene, field strength 15.60kV/cm3, when frequency is 150Hz,
Degradation of toluene rate is 17%, and energy efficiency is 2g/ (kWh)-1；Add Mn/ γ-Al2O3After catalyst, degradation of toluene rate reaches
69.2%, energy efficiency reaches 9.5g/ (kWh)-1.At present the technology distance heavy industrialization application still have it is certain away from
From.And its bottleneck problem faced --- energy consumption problem also has to be solved.
The energy of plasma is to be accumulated in discharge process by the collision between electronics.It is non-equilibrium under normal pressure
Heat caused by plasma power consumption, is to cause one of elevated factor of temperature of reactor.If this portion of energy can be added
To utilize, for improving VOCs degradation rate and solving the problems, such as that plasma technique energy consumption is an important breakthrough.
The content of the invention
To solve deficiency of the existing plasma device in VOCs controls, the present invention becomes plasma technique and flow direction
Change technology combination, there is provided one kind flow direction conversion plasma reaction device, the device can effectively improve the drop of VOCs pollutants
Energy consumption in solution rate and effectively reduction course of reaction.
The technical solution adopted by the present invention is as follows：
A kind of flow direction conversion plasma device for VOCs processing of the present invention, including plasma generator (1), gas
Body pipeline (2) and magnetic valve (3)；Plasma generator (1) is dielectric barrier discharge plasma generator, equipped with high-pressure stage
(4) and earthing pole (6), high-pressure stage (4) are fixed on the central axis of plasma generator (1) reactor using insulating plug (5),
For connecting frequency-changing AC high voltage power supply (17), earthing pole (6) is wrapped in plasma generator (1) reactor outer wall axial direction
Between position, inside reactor centre position formed region of discharge (7)；Region of discharge (7) axial both sides are heat accumulating sections (8), heat accumulating sections
(8) inside is placed with cordierite (9) and is used as heat storage, preferably puts six pieces per side, heat-preservation cotton (10) is tied with outside reactor；One gas
The both ends of body pipeline connect plasma generator (1) reactor axis to the plasma generator air inlet at both ends and gone out respectively
(wherein one end is air inlet to gas port, and the other end is then gas outlet, does not limit which end as air inlet, and which end is outlet
Mouthful), a magnetic valves and d magnetic valves are respectively equipped with the plasma generator air inlet of this branch gas piping and gas outlet, this branch
Gas piping is provided with total gas outlet (12) between a magnetic valves and d magnetic valves；It is additionally provided with another gas piping, gas simultaneously
Pipeline both ends connect plasma generator (1) reactor axis to the plasma generator air inlet at both ends and gas outlet respectively
(wherein one end is air inlet, and the other end is then gas outlet, does not limit which end as air inlet, and which end is gas outlet),
The plasma generator air inlet of this branch gas piping and gas outlet are respectively equipped with b magnetic valves and c magnetic valves, this branch flue
Road is provided with total air inlet (11) between b magnetic valves and c magnetic valves.
Preferably, the reactor of plasma generator (1) is quartz ampoule (16), and external diameter 32mm, internal diameter 29mm, wall thickness
1.5mm, length 400mm.
It is earthing pole (6) from stainless steel wire preferably, being high-pressure stage (4) from tungsten filament.
Preferably, using frequency-changing AC high voltage power supply (17), voltage regulation limits 0-100kV, frequency-tuning range
For 50-500Hz.
The method for carrying out flowing to conversion using said apparatus, controlled by controlling the switch of tetra- magnetic valves of a, b, c, d
The direction of air current flow.Gas enters from total air inlet (11), and when magnetic valve (3) a, c is opened, gas occurs from plasma
Device (1) enters and (gone out) gas port (13) entrance, and right-to-left flows through plasma generator (1), gone out from plasma generator (1)
After (entering) gas port (14) comes out, finally discharged from total gas outlet (12)；And when magnetic valve (3) b, d is opened, gas is from left-hand
The right side flows through plasma generator (1).Plasma reactor (1) outside wall temperature is surveyed in course of reaction using thermocouple (15) to become
Change.
Using said apparatus degraded VOCs method, it is characterised in that mainly include：
(1) under certain experiment condition, pollutant concentration is adjusted to reach stability number；
(2) frequency-changing AC high voltage power supply (17) is utilized, fixed voltage, frequency, is discharged 120 minutes, record temperature change, leakage
Dead electricity stream and toluene concentration；Pilot process is commutated.
The invention has the advantages that：
1. compared with independent plasma, the degradation rate of pollutant is improved；
2. compared with independent plasma, the energy consumption in course of reaction is reduced, improves energy efficiency.
Brief description of the drawings
Fig. 1 is flow direction conversion plasma device schematic diagram
1 plasma generator, 2 gas pipings, 3 magnetic valves, 4 high-pressure stages, 5 insulating plugs, 6 earthing poles, 7 region of discharges, 8 store
Hot arc, 9 cordierites, 10 heat-preservation cottons, 11 total air inlets, 12 total gas outlets, 13 plasma generators enter and (go out) gas port, 14 etc. from
Daughter generator goes out and (entered) gas port, 15 thermocouples, 16 quartz ampoules, 17 frequency-changing AC high voltage power supplies；
Embodiment
With reference to example, the present invention will be further described, but the present invention is not limited to following instance.
Device as shown in Figure 1, the present invention include plasma generator (1) and gas piping (2) and magnetic valve (3).
Plasma generator (1) is dielectric barrier discharge plasma generator.It is high-pressure stage (4) from tungsten filament, using insulating plug
(5) plasma generator (1) center is fixed on, the iron wire for being wrapped in reactor outer wall is earthing pole (6).Region of discharge (7) two
The heat accumulating sections (8) of side are placed with cordierite (9) and are used as heat storage, put six pieces per side, outside is tied with heat-preservation cotton (10).A, b, c, d tetra-
Individual magnetic valve (3) controls the direction of air current flow, and gas enters from total air inlet (11), when magnetic valve (3) a, c is opened,
Gas enters and (gone out) gas port (13) from plasma generator (1) and enters, and right-to-left flows through plasma generator (1), from etc.
After plasma generator (1) goes out and (entered) gas port (14) out, finally discharged from total gas outlet (12)；And when magnetic valve (3) b, d is beaten
When opening, gas is to flow through plasma generator (1) from left to right.It is anti-using thermocouple (15) survey plasma in course of reaction
Device (1) outside wall temperature is answered to change.Toluene concentration is adjusted to reach stability number, using frequency-changing AC high voltage power supply (17), fixed voltage,
Frequency, discharge 120 minutes, record temperature change, leakage electric current and toluene concentration.
Embodiment 1
To remove toluene initial concentration 500mg/m3Exemplified by, following steps：
High-pressure stage (4) selects tungsten filament, is fixed on plasma generator (1) center with insulating plug (5), is wrapped in reactor
The iron wire of outer wall is earthing pole (6).The heat accumulating sections (8) of region of discharge (7) both sides are placed with cordierite (9) and are used as heat storage, are put per side
Six pieces, outside is tied with heat-preservation cotton (10).The direction of air current flow is controlled using tetra- magnetic valves (3) of a, b, c, d.Course of reaction
It is middle that the change of plasma reactor (1) outside wall temperature is surveyed using thermocouple (15).Toluene concentration is adjusted to reach stability number.
Experiment condition：Not plus flow direction conversion with flowing to transformation period is 10min, and field strength is 14.55kV/cm, and frequency is equal
For 100Hz, gas velocity is 15.15cm/s, and the earthing pole number of turn is 7 circles, and electric discharge section length is 5cm, pollutant initial concentration
It is 500mg/cm3
Tested according to embodiment 1, discharge time is 120min.Experimental result is shown in Table 1.
Table 1 is not plus flow direction conversion changes with the toluene removal rate and energy efficiency for flowing to 10min transformation period
As a result show, compared to not plus flow direction conversion, introducing flows to converter technique and the commutation cycle is 10min, toluene removal
Rate increases 26.4%, and absolute removal amount improves 56.88mg/h-1, energy efficiency is also slightly elevated, about 0.31g (kW
h)-1。
Embodiment 2
To remove toluene initial concentration 600mg/m3Exemplified by, following steps：
High-pressure stage (4) selects tungsten filament, is fixed on plasma generator (1) center with insulating plug (5), is wrapped in reactor
The iron wire of outer wall is earthing pole (6).The heat accumulating sections (8) of region of discharge (7) both sides are placed with cordierite (9) and are used as heat storage, are put per side
Six pieces, outside is tied with heat-preservation cotton (10).The direction of air current flow is controlled using tetra- magnetic valves (3) of a, b, c, d.Course of reaction
It is middle that the change of plasma reactor (1) outside wall temperature is surveyed using thermocouple (15).Toluene concentration is adjusted to reach stability number.
Experiment condition：Not plus flow direction conversion with flow to transformation period for 10,12,14min, field strength is 13.09kV/cm,
Frequency is 150Hz, and gas velocity is 15.15cm/s, and the earthing pole number of turn is 7 circles, and electric discharge section length is 5cm, at the beginning of pollutant
Beginning concentration is 600mg/cm3
Tested according to embodiment 2, discharge time is 120min.Experimental result is shown in Table 2.
Table 2 is not plus flow direction is converted with adding the clearance of flow direction conversion toluene and energy efficiency to change (commutating period unit
min)
As a result show, with not plus compared with flowing to conversion, it is 10min that introducing, which flows to converter technique and flows to transformation period, first
Benzene clearance is increased to 80.3% by 38.5%, increases 41.8%.Energy efficiency is also from 11.27g (kWh)-1It is increased to
11.65g·(kW·h)-1, increase 0.38g (kWh)-1.And as can be seen from Table 2, in certain scope, with stream
Extend to transformation period, toluene removal rate is on a declining curve, and energy density is also gradually reduced, on the contrary, energy efficiency is gradually increasing.
Claims (7)
1. a kind of flow direction conversion plasma device for VOCs processing, it is characterised in that including plasma generator
(1), gas piping (2) and magnetic valve (3)；Plasma generator (1) is dielectric barrier discharge plasma generator, is furnished with
High-pressure stage (4) and earthing pole (6), high-pressure stage (4) are fixed in plasma generator (1) reactor using insulating plug (5)
At mandrel, for connecting frequency-changing AC high voltage power supply (17), earthing pole (6) is wrapped in outside plasma generator (1) reactor
Wall axial direction centre position, region of discharge (7) is formed in inside reactor centre position；Region of discharge (7) axial both sides are heat accumulating sections
(8), it is placed with cordierite (9) inside heat accumulating sections (8) and is used as heat storage, heat-preservation cotton (10) is tied with outside reactor；One flue
The both ends on road connect plasma generator air inlet and outlet of plasma generator (1) reactor axis to both ends respectively
Mouthful, a magnetic valves and d magnetic valves are respectively equipped with the plasma generator air inlet of this branch gas piping and gas outlet, this branch
Gas piping is provided with total gas outlet (12) between a magnetic valves and d magnetic valves；It is additionally provided with another gas piping, gas simultaneously
Pipeline both ends connect plasma generator air inlet and outlet of plasma generator (1) reactor axis to both ends respectively
Mouthful, b magnetic valves and c magnetic valves are respectively equipped with the plasma generator air inlet of this branch gas piping and gas outlet, this branch
Gas piping is provided with total air inlet (11) between b magnetic valves and c magnetic valves.
2. convert plasma device according to a kind of flow direction for VOCs processing described in claim 1, it is characterised in that etc.
The reactor of plasma generator (1) is quartz ampoule (16), external diameter 32mm, internal diameter 29mm, wall thickness 1.5mm, length 400mm.
3. convert plasma device according to a kind of flow direction for VOCs processing described in claim 1, it is characterised in that choosing
It is high-pressure stage (4) with tungsten filament, is earthing pole (6) from stainless steel wire.
4. convert plasma device according to a kind of flow direction for VOCs processing described in claim 1, it is characterised in that adopt
With frequency-changing AC high voltage power supply (17), voltage regulation limits 0-100kV, frequency-tuning range 50-500Hz.
5. convert plasma device according to a kind of flow direction for VOCs processing described in claim 1, it is characterised in that every
Put six peplolites (9) in side.
6. carry out flowing to conversion using a kind of flow direction conversion plasma device for VOCs processing described in claim 1
Method, it is characterised in that control the direction of air current flow by controlling the switch of tetra- magnetic valves of a, b, c, d.Gas is from total
Air inlet (11) enters, and when magnetic valve (3) a, c is opened, gas enters and (gone out) gas port (13) from plasma generator (1) and enters
Enter, right-to-left flows through plasma generator (1), after plasma generator (1) goes out and (entered) gas port (14) out, finally
Discharged from total gas outlet (12)；And when magnetic valve (3) b, d is opened, gas is to flow through plasma generator from left to right
(1).The change of plasma reactor (1) outside wall temperature is surveyed using thermocouple (15) in course of reaction.
7. a kind of flow direction conversion plasma device for VOCs processing described in claim 1 is utilized to carry out VOCs processing
Method, it is characterised in that (1) under certain experiment condition, adjust pollutant concentration to reach stability number；
(2) frequency-changing AC high voltage power supply (17) is utilized, fixed voltage, frequency, is discharged 120 minutes, record temperature change, leakage electricity
Stream and toluene concentration；Pilot process is commutated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009182.9A CN107715662A (en) | 2017-10-25 | 2017-10-25 | A kind of flow direction conversion plasma device and method for VOCs processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009182.9A CN107715662A (en) | 2017-10-25 | 2017-10-25 | A kind of flow direction conversion plasma device and method for VOCs processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107715662A true CN107715662A (en) | 2018-02-23 |
Family
ID=61212749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711009182.9A Pending CN107715662A (en) | 2017-10-25 | 2017-10-25 | A kind of flow direction conversion plasma device and method for VOCs processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107715662A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010097779A (en) * | 2000-04-26 | 2001-11-08 | 손재익 | Configuration and operating method of RCO system for waste gas purification |
| JP3112831U (en) * | 2005-05-25 | 2005-08-25 | 華懋科技股▲分▼ 有限公司 | Thermal storage exhaust gas combustion system |
| KR20060083110A (en) * | 2005-10-26 | 2006-07-20 | 홍영기 | Regenerative thermal oxidizer with no switching vlave |
| CN103759275A (en) * | 2013-12-27 | 2014-04-30 | 浙江大学 | Device and method for combusting and treating organic waste gas through plasma enhanced porous medium |
| CN207430003U (en) * | 2017-10-25 | 2018-06-01 | 北京工业大学 | A kind of flow direction conversion plasma device for VOCs processing |
-
2017
- 2017-10-25 CN CN201711009182.9A patent/CN107715662A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010097779A (en) * | 2000-04-26 | 2001-11-08 | 손재익 | Configuration and operating method of RCO system for waste gas purification |
| JP3112831U (en) * | 2005-05-25 | 2005-08-25 | 華懋科技股▲分▼ 有限公司 | Thermal storage exhaust gas combustion system |
| KR20060083110A (en) * | 2005-10-26 | 2006-07-20 | 홍영기 | Regenerative thermal oxidizer with no switching vlave |
| CN103759275A (en) * | 2013-12-27 | 2014-04-30 | 浙江大学 | Device and method for combusting and treating organic waste gas through plasma enhanced porous medium |
| CN207430003U (en) * | 2017-10-25 | 2018-06-01 | 北京工业大学 | A kind of flow direction conversion plasma device for VOCs processing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113453801B (en) | Exhaust treatment system and method | |
| CN103841741B (en) | Atmospheric pressure plasma generator based on dielectric barrier discharge | |
| CN103079329B (en) | A kind of high-pressure plasma ignition device | |
| CN207430003U (en) | A kind of flow direction conversion plasma device for VOCs processing | |
| CN103418217A (en) | Creepage and packed-bed hybrid discharge industrial waste gas treatment device | |
| CN107715662A (en) | A kind of flow direction conversion plasma device and method for VOCs processing | |
| CN208406629U (en) | A kind of microwave heating catalysis oxidation VOCs processing unit | |
| CN109714850A (en) | It is a kind of for generating the high efficiency method of clean high temperature air | |
| CN104219863A (en) | Double-medium low-temperature plasma generator | |
| US9567874B2 (en) | Electric induction fluid heaters for fluids utilized in turbine-driven electric generator systems | |
| CN206500014U (en) | A kind of low-temperature plasma Benitration reactor | |
| CN206549450U (en) | A kind of processing industrial waste gas integrated apparatus based on multi-layer plate-type | |
| CN205570096U (en) | Circulation exhaust -gas treatment equipment | |
| CN214862347U (en) | Converter flue gas purification dust pelletizing system | |
| CN202316499U (en) | Ultrahigh frequency eddy heating device | |
| CN105854857B (en) | A kind of active carbon electric heating regenerating equipment and its application method | |
| CN102183029A (en) | Tail gas treatment furnace of annular plasma torch | |
| CN117380099A (en) | Ammonia decomposition reactor and system containing multiple groups of induction coils | |
| CN102407233A (en) | Ultrahigh frequency eddy current heating device | |
| CN113173560B (en) | Large double water-cooling ozone discharging chamber | |
| CN202968110U (en) | Cooling device for ozone generator | |
| CN2869669Y (en) | High-power electromagnetic induction heat pipe system | |
| CN108502847A (en) | Integrated plasma device for producing hydrogen | |
| CN211781944U (en) | Zero gas loss adsorption dryer air heating device | |
| CN102188876A (en) | High-efficiency energy-saving adsorption system for industrial volatile organic pollutants |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |