CN106216096A - A kind of smoke pollution substance treating method based on wet type plasma - Google Patents
A kind of smoke pollution substance treating method based on wet type plasma Download PDFInfo
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- CN106216096A CN106216096A CN201610595948.5A CN201610595948A CN106216096A CN 106216096 A CN106216096 A CN 106216096A CN 201610595948 A CN201610595948 A CN 201610595948A CN 106216096 A CN106216096 A CN 106216096A
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- flue gas
- wet type
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- pollutant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
Abstract
The present invention discloses a kind of smoke pollution substance treating method based on wet type plasma, and it is obvious that described method removes dust granules thing, it is achieved to the high-efficiency desulfurization of flue gas, denitration, demercuration.Described method, first with wet electrostatic technology, carries out adsorbing and removing to the dust granules thing in flue gas；Then utilizing wet type plasma technique, the volatile organic matter in flue gas is carried out oxidation removal, in flue gas, Elemental Mercury, sulfur dioxide and nitrogen oxides obtain deep oxidation；Recycling bubble absorption method, pollutant absorbing and removing remaining after flue gas is aoxidized；Eventually pass the hydrargyrum in cation exchange resin separation and Extraction bubble absorption liquid and sulfur, nitre.The disclosure has efficient, energy-conservation, the feature of resource circulation utilization, controls each link index flexibly in conjunction with pollutant component in actual flue gas, can meet the demand of different factory.
Description
Technical field
This method belongs to industrial smoke Pollutant Treatment technical field, is specifically related to a kind of cigarette based on wet type plasma
Gas Pollutant Treatment method.
Background technology
Containing multiple pollutants such as dust granules thing, Elemental Mercury, sulfur dioxide and nitrogen oxides in flue gas.Traditional flue gas
Pollutant Treatment method is to arrange an independent processing means for each pollutant, and dominant technical approach includes cleaner unit
Removing dust granules thing, lime stone slurry absorbing and removing sulfur dioxide, ammine selectivity catalytic reduction removing nitrogen oxides etc..This
Processing mode long flow path, number of devices are many and complicated, thus cause the investment of processing system and operating cost is high, floor space
Greatly.Therefore, develop new technique, in shorter flow process, utilize the fewest processing equipment, it is achieved the connection of multiple pollutant
Close the striving direction that removing is gas cleaning.Low temperature plasma gas purification techniques in recent years, owing to technique is simple, can be simultaneously
The advantages such as removal multiple pollutant, floor space are little cause the extensive concern of people.But the complexity of plasma reaction
And the uncontrollability of degree of discharge, greatly limit the degree of plasma cleaning technological direction industrial applications.
Summary of the invention
Based on this, the present invention discloses a kind of smoke pollution substance treating method based on wet type plasma, described method bag
Include following steps:
S100, utilize wet static dedusting technology, the dust granules thing in flue gas is carried out adsorbing and removing；
S200, utilize wet type plasma technique, the volatile organic matter in flue gas is carried out oxidation removal and to flue gas
In Elemental Mercury, sulfur dioxide and nitrogen oxides aoxidize；
S300, utilize bubble absorption method, pollutant remaining in the flue gas after step S200 processes are absorbed
Removing.
The present invention has efficient, energy-conservation, the feature of resource circulation utilization, in conjunction with pollutant component in actual flue gas to each ring
Joint index controls flexibly, can meet the demand of different factory.
Accompanying drawing explanation
Fig. 1 is the smoke pollution substance treating method schematic diagram of the present invention；
Fig. 2 is the wet electrostatic method removing dust granules thing schematic diagram of the present invention；
Fig. 3 is the plasma reaction schematic diagram of the present invention.
Detailed description of the invention
In one embodiment, the present invention discloses a kind of smoke pollution substance treating method based on wet type plasma, institute
The method of stating comprises the following steps:
S100, utilize wet static dedusting technology, the dust granules thing in flue gas is carried out adsorbing and removing；
S200, utilize wet type plasma technique, the volatile organic matter in flue gas is carried out oxidation removal and to flue gas
In Elemental Mercury, sulfur dioxide and nitrogen oxides aoxidize；
S300, utilize bubble absorption method, pollutant remaining in the flue gas after step S200 processes are absorbed
Removing.
In the present embodiment, as shown in Figure 1, it is provided that a kind of flue gas pollutant process side based on wet type plasma
Method, described method, first with wet electrostatic technology, carries out adsorbing and removing to the dust granules thing in flue gas；Then wet type is utilized
Plasma technique, carries out oxidation removal to the volatile organic matter in flue gas, Elemental Mercury, sulfur dioxide and nitrogen oxidation in flue gas
Thing obtains deep oxidation；Recycling bubble absorption method, pollutant absorbing and removing remaining after flue gas is aoxidized.Finally by sun from
Hydrargyrum in sub-exchange resin separation bubbling absorbing liquid and sulfur, nitre, and from absorbing liquid, extract sulfur fertilizer, nitre fertilizer further for agriculture
Industry, the mercury salt eluted from the resin that absorption is saturated can be as the raw material of industry after exsiccation etc. processes.
In one embodiment, described wet static dedusting technology specifically includes, and utilizes electrostatic interaction by dust granules thing
It is adsorbed on the pole plate of Wet type electrostatic device, and the moisture film formed by the drencher on Wet type electrostatic device washes away.
In the present embodiment, described wet static dedusting technology utilizes electrostatic interaction that dust granules thing is adsorbed in pole plate
On, and washed away by moisture film.The temperature difference of moisture film and gas promotes the thermophoresis effect of granule, the water film evaporation that gas-liquid heat exchange causes,
Increase gas humidity, strengthen negative electrode corona discharge, significantly improve the removal efficiency of granule.
Described wet electrostatic technology carries out adsorbing and removing to the dust granules thing in flue gas, and schematic diagram is as shown in Figure 2.Contain
The gas of dust granules thing, is being connected to the high voltage electric field that formed between the cathode line of high-voltage DC power supply and the positive plate of ground connection
In by time, owing to electrostatic interaction grit is deposited on positive plate, then rinsed by moisture film.After flue gas is electrostatically treated in fact
The wet type adsorbing and removing of existing dust granules thing, in preventing from producing when dust granules thing and plasma removing volatile organic matter
Between product contact time cause secondary pollution thus affect the efficiency of degraded.
In one embodiment, the temperature difference can be formed between described moisture film and the gas passing through Wet type electrostatic device.
In the present embodiment, the described temperature difference promotes the thermophoresis phenomenon of described dust granules thing, adds gas humidity, promotees
Enter the negative electrode corona discharge of wet scrubber, improve the removal efficiency of granule.
In one embodiment, described step S200 is particularly as follows: utilize the generation of described wet type plasma technique multiple certainly
By base, high energy electron, ion and active particle, act on flue gas pollutant, the volatile organic matter in flue gas pollutant is dropped
Solve as carbon dioxide and water；Described Elemental Mercury, sulfur dioxide and nitrogen oxides are become mercury ion, sulfur trioxide, titanium dioxide
Nitrogen.
In the present embodiment, described plasma technique carries out oxidation removal, flue gas to the volatile organic matter in flue gas
Middle Elemental Mercury, sulfur dioxide and nitrogen oxides obtain deep oxidation, and schematic diagram is as shown in Figure 3.The quick rising edge of high voltage power supply
Produce highfield, obtain high energy electron, make the steam in flue gas, oxygen equimolecular be activated ionization, produce multiple free radical
(such as oxygen-derived free radicals, hydroxyl radical free radical etc.), high energy electron and ion isoreactivity particle, act on flue gas pollutant, through one be
Row reaction, volatile organic matter is degraded to harmless carbon dioxide and water etc., Elemental Mercury, sulfur dioxide and nitrogen oxides the most at last
It is oxidized to mercury ion, sulfur trioxide, nitrogen dioxide etc..
In one embodiment, described method uses dielectric impedance streamer based on the excitation of high frequency AC-DC overlaying power to put
Electricity, produces multiple free radical, high energy electron, ion and active particle.
Further, electronics obtains energy from extra electric field, and energized gas produces electron avalanche, the conductive channel energy of foundation
Very fast by discharging gap, form a large amount of filamentous pulse micro discharge, uniformly, be stably full of whole discharging gap.
Gas is breakdown, conductive channel set up after, space charge carries in discharging gap and is accumulated on medium, barrier surface charge
To set up electric field, its direction is contrary with external electric field, thus weakening effect electric field, it is to avoid the office easily occurred in corona discharge process
Portion's spark or arc discharge, system reliability is strong.
Further, high frequency AC-DC overlaying power i.e. superposition alternating voltage on DC base voltage, have and compare the pulse power
More stable output and less expensive cost, prospects for commercial application is good.Use high frequency AC-DC overlaying power as swashing
Encourage power supply, make whole discharge tube region be streamer-discahrge district, effectively process gas pollutant.
In one embodiment, after described step S300 utilizes bubble absorption liquid to process step S200 in bubble tower
Pollutant remaining in flue gas carry out absorbing and removing.
In the present embodiment, multiple pollutant absorbing and removing process after described bubble absorption method is substantially carried out oxidation.Bubbling
Tower can make gas-liquid be sufficiently mixed, and reaction is good, and absorbing and removing is thorough, has again simple in construction, easily clears up, stable operation, throws
Money and maintenance cost are low, heat and mass efficiency advantages of higher.
In one embodiment, equipped with bubble absorption liquid in described bubble tower；Described method passes through cation exchange resin
Separate the hydrargyrum in bubbling absorbing liquid, sulfur, nitre, and extraction sulfur fertilizer, nitre fertilizer are used for agricultural, and will inhale from bubble absorption liquid further
The mercury salt eluted on attached saturated cation exchange resin through exsiccation process after as the raw material of industry.
More excellent, described bubble absorption liquid is ammonia.
In the present embodiment, described ammonia and mercury ion, sulfur trioxide, nitrogen dioxide generation chemical reaction, product warp
The raw material of industry or agricultural fertilizer it is respectively used to after crossing separation and Extraction.
In this embodiment, the hydrargyrum in cation exchange resin separation and Extraction bubble absorption liquid and sulfur, nitre are eventually passed.
Using cation exchange resin, its principle is that cation exchange resin contains substantial amounts of hydrion, higher when encountering absorption affinity
Replaced can go out during mercury ion, thus reach the purpose of Adsorption mercury ion.This method advantage is that cation exchanges
Resin can be recycled, and when adsorbing saturated, can remove mercury ion by the method for eluting, recover its to mercury in flue gas from
The absorbability of son, the mercury salt eluted can also be as the raw material of industry after exsiccation etc. processes.Meanwhile, drum is extracted
Ammonium nitrate, ammonium sulfate in bubble liquid may be used for agricultural fertilizer.
In one embodiment, described bubble tower utilizes the piezoelectric ceramic ultrasonic transducer that frequency is 1000Hz to produce ultrasonic
?.
Preferably, the piezoelectric ceramics class transducer that described ultrasonic field bubble tower uses frequency to be 1000Hz.Ultrasound wave conduct
A kind of special form of energy can produce the chemical industry mass transfer effects such as cavitation effect, turbulence effect, perturbation effect in gas-liquid system,
And then efficient hardening gas-liquid interphase mass transfer.In mass-transfer progress, ultrasonic field energy makes fluid mass-transfer resistance reduce, and improves diffusion system
Number and Liquid volumetric mass transfer.Meanwhile, ul-trasonic irradiation is also favourable for the distribution of bubble characteristic parameter, is greatly improved
Assimilation effect.
In one embodiment, equipped with bubble absorption liquid in described bubble tower；Described method passes through cation exchange resin
Separate the hydrargyrum in bubbling absorbing liquid, sulfur, nitre, from bubble absorption liquid, extract sulfur fertilizer, nitre fertilizer for agricultural and saturated by adsorbing
The mercury salt eluted on cation exchange resin through exsiccation process after as the raw material of industry.
In one embodiment, as shown in Figure 1, it is provided that a kind of flue gas pollutant process side based on wet type plasma
Method, described method, first with wet electrostatic technology, carries out adsorbing and removing to the dust granules thing in flue gas；Then wet type is utilized
Plasma technique, carries out oxidation removal to the volatile organic matter in flue gas, Elemental Mercury, sulfur dioxide and nitrogen oxidation in flue gas
Thing obtains deep oxidation；Recycling bubble absorption method, pollutant absorbing and removing remaining after flue gas is aoxidized.Finally by sun from
Hydrargyrum in sub-exchange resin separation bubbling absorbing liquid and sulfur, nitre, and from absorbing liquid, extract sulfur fertilizer, nitre fertilizer further for agriculture
Industry, the mercury salt eluted from the resin that absorption is saturated can be as the raw material of industry after exsiccation etc. processes.
Described wet static dedusting technology utilizes electrostatic interaction to be adsorbed on pole plate by dust granules thing, and is rushed by moisture film
Brush.The temperature difference of moisture film and gas promotes the thermophoresis phenomenon of granule, the water film evaporation that gas-liquid heat exchange causes, and increases gas humidity,
Strengthen negative electrode corona discharge, significantly improve the removal efficiency of granule.
Described wet type plasma technique produces multiple free radical, high energy electron and ion isoreactivity particle, acts on cigarette
Gas pollutant, through series reaction, volatile organic matter is degraded to harmless carbon dioxide and water etc. the most at last, Elemental Mercury,
Sulfur dioxide and nitrogen oxides are oxidized to mercury ion, sulfur trioxide, nitrogen dioxide etc..
Described bubble absorption method is substantially carried out multiple pollutant absorbing and removing process after oxidation.Bubble tower can make gas-liquid abundant
Mixing, reaction is good, and absorbing and removing is thorough, has again simple in construction, easily clears up, stable operation, and investment and maintenance cost are low,
Heat and mass efficiency advantages of higher.
The smoke pollution substance treating method that this embodiment provides is because wet type low temperature plasma can process multiple dirt simultaneously
Contaminate thing and there is efficient feature；Use wet static dedusting binding plasma reaction technology can reduce operating cost so that
System is economical；Recycle the pollutant in flue gas so that system has the feature of resource circulation utilization, energy-saving and emission-reduction
Benefit.
In this embodiment, described wet electrostatic technology carries out adsorbing and removing, principle to the dust granules thing in flue gas
Figure is as shown in Figure 2.Containing the gas of dust granules thing, it is being connected between the cathode line of high-voltage DC power supply and the positive plate of ground connection
When the high voltage electric field formed passes through, owing to electrostatic interaction grit is deposited on positive plate, then rinsed by moisture film.Cigarette
Realize the wet type adsorbing and removing of dust granules thing after gas is electrostatically treated, prevent dust granules thing from removing volatility with plasma
Cause secondary pollution during the intermediate product contact produced during Organic substance thus affect the efficiency of degraded.
Further, there is certain temperature difference between usual gas and moisture film, thus in electrostatic precipitator, form temperature
?.Further, due to gas and moisture film heat exchange, it is formed about stronger thermograde in water film surface, thus granule is produced
Thermophoresis effect, affects the kinetic characteristic of granule.Meanwhile, gas-liquid heat exchange causes water film evaporation, so that the humidity of gas increases, aobvious
Write the corona discharge improving negative electrode, form corona wind, thus granule motion is produced impact, improve removal efficiency.
In this embodiment, described plasma technique carries out oxidation removal, cigarette to the volatile organic matter in flue gas
In gas, Elemental Mercury, sulfur dioxide and nitrogen oxides obtain deep oxidation, and schematic diagram is as shown in Figure 3.High voltage power supply quickly rises
Along producing highfield, obtain high energy electron, make the steam in flue gas, oxygen equimolecular be activated ionization, produce multiple freedom
Base (such as oxygen-derived free radicals, hydroxyl radical free radical etc.), high energy electron and ion isoreactivity particle, act on flue gas pollutant, Jing Guoyi
Serial reaction, volatile organic matter is degraded to harmless carbon dioxide and water etc., Elemental Mercury, sulfur dioxide and nitrogen oxidation the most at last
Thing is oxidized to mercury ion, sulfur trioxide, nitrogen dioxide etc..
Preferably, increase the concentration of steam in flue gas, change the kind of active group in plasma reactor and contain
Amount, excites maximum hydroxyl radical free radical, improves heterogeneous oxidization rate.
Further, discharge excitation goes out the content of more hydroxyl radical free radical, oxygen-derived free radicals and ozone and can decrease.Hydroxyl
The heterogeneous oxidization approach that base free radical provides is the major way of low temperature plasma desulfurization, substantially increases desulfurization degree, also exists
Improve the removal efficiency of Elemental Mercury, nitrogen oxides to a certain extent.
Further, for the course of reaction of volatile organic matter molecule, under the effect of hydroxyl radical free radical, Organic substance is big
In molecule, hydrogen bond most probable first disconnects, the intermediate product of generation and water, and following reaction produces multiple free radical and other middle products
Thing, continues and wet type plasma reaction, and the final home to return to of carbon is carbon dioxide, and hydrogen is then last presented in water.
Further, the increase of steam can reduce the generation of byproducts of carbon monoxide and ozone.
In this embodiment, pollutant absorbing and removing remaining after flue gas is aoxidized by described bubble absorption technology.
Above content is to combine the further description that the present invention is done by concrete preferred implementation, it is impossible to assert
The detailed description of the invention of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of present inventive concept, the some simple deduction or replace made, all should be considered as belonging to the present invention by providing
The protection domain that claims determine.
Claims (9)
1. one kind based on wet type isoionic smoke pollution substance treating method, it is characterised in that said method comprising the steps of:
S100, utilize wet static dedusting technology, the dust granules thing in flue gas is carried out adsorbing and removing；
S200, utilize wet type plasma technique, the volatile organic matter in flue gas is carried out oxidation removal and in flue gas
Elemental Mercury, sulfur dioxide and nitrogen oxides aoxidize；
S300, utilize bubble absorption method, pollutant remaining in the flue gas after step S200 processes are carried out absorbing and removing.
Method the most according to claim 1, it is characterised in that: preferably, described wet static dedusting technology specifically includes,
Electrostatic interaction is utilized to be adsorbed on the pole plate of Wet type electrostatic device by dust granules thing, and by the drencher shape on Wet type electrostatic device
The moisture film become washes away.
Method the most according to claim 2, it is characterised in that: energy between described moisture film and the gas passing through Wet type electrostatic device
Enough form the temperature difference.
Method the most according to claim 1, it is characterised in that described step S200 specifically includes: utilize described wet type etc.
Gas ions technology produces multiple free radical, high energy electron, ion and active particle, acts on flue gas pollutant, by smoke pollution
Volatile organic matter in thing is degraded to carbon dioxide and water；
Described Elemental Mercury, sulfur dioxide and nitrogen oxides are become mercury ion, sulfur trioxide, nitrogen dioxide.
Method the most according to claim 4, it is characterised in that: described method uses and swashs based on high frequency AC-DC overlaying power
The dielectric impedance streamer-discahrge encouraged, produces multiple free radical, high energy electron, ion and active particle.
Method the most according to claim 1, it is characterised in that: described step S300 specifically includes: utilize in bubble tower
Bubble absorption liquid step S200 is processed after flue gas in remaining pollutant nitrogen dioxide, sulfur trioxide and mercury ion and other
Amounts of residual contamination carries out absorbing and removing.
Method the most according to claim 6, it is characterised in that: described bubble absorption liquid is ammonia.
Method the most according to claim 6, it is characterised in that: described bubble tower utilizes the piezoelectric ceramics that frequency is 1000Hz
Ultrasonic transducer produces ultrasonic field.
Method the most according to claim 6, it is characterised in that: equipped with bubble absorption liquid in described bubble tower；Described method
By the hydrargyrum in cation exchange resin separation bubbling absorbing liquid, sulfur, nitre, from bubble absorption liquid, extraction sulfur fertilizer, nitre fertilizer are used for
Agricultural, and the mercury salt eluted on saturated cation exchange resin will be adsorbed after exsiccation processes as industrial former
Material.
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Cited By (4)
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| CN109252918A (en) * | 2018-09-30 | 2019-01-22 | 金涛 | A kind of Fractions of Diesel Engine Exhaust Particulates object processing system |
| CN109694110A (en) * | 2018-12-20 | 2019-04-30 | 西安交通大学 | A kind of method of Recovery Purifying recirculated cooling water and horizontal continuous reaction apparatus |
| CN111068451A (en) * | 2019-12-13 | 2020-04-28 | 华电电力科学研究院有限公司 | Device and method for efficiently removing fine particles through temperature and humidity regulation |
| CN109252918B (en) * | 2018-09-30 | 2024-04-19 | 金涛 | Diesel engine tail gas particulate matter processing system |
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| CN101780435A (en) * | 2010-02-25 | 2010-07-21 | 宁波大学 | Wet static dedusting device |
| JP2010269259A (en) * | 2009-05-22 | 2010-12-02 | Techno Ryowa Ltd | Air cleaner |
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| JP2010269259A (en) * | 2009-05-22 | 2010-12-02 | Techno Ryowa Ltd | Air cleaner |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252918A (en) * | 2018-09-30 | 2019-01-22 | 金涛 | A kind of Fractions of Diesel Engine Exhaust Particulates object processing system |
| CN109252918B (en) * | 2018-09-30 | 2024-04-19 | 金涛 | Diesel engine tail gas particulate matter processing system |
| CN109694110A (en) * | 2018-12-20 | 2019-04-30 | 西安交通大学 | A kind of method of Recovery Purifying recirculated cooling water and horizontal continuous reaction apparatus |
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