CN107115967B - Temperature/wet regulation more field strength Combined Electrostatic dust pelletizing system - Google Patents
Temperature/wet regulation more field strength Combined Electrostatic dust pelletizing system Download PDFInfo
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- CN107115967B CN107115967B CN201710335297.0A CN201710335297A CN107115967B CN 107115967 B CN107115967 B CN 107115967B CN 201710335297 A CN201710335297 A CN 201710335297A CN 107115967 B CN107115967 B CN 107115967B
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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
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
- B03C3/014—Addition of water; Heat exchange, e.g. by condensation
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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
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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
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/36—Controlling flow of gases or vapour
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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
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
-
- 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
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
Abstract
The present invention relates to a kind of temperature/wet regulation more field strength Combined Electrostatic dust pelletizing systems, including the temperature adjustment humidification system being sequentially connected to, the charge reinforced system of electric precipitation final stage pulse, it is layered desulfurization collaboration humidification dust pelletizing system, and the charge reinforced system of particulate matter that humidification flows, the present invention carries out system level reinforcing to particulate matter removing from technology and design level, by temperature adjustment, humidification, flow, charged combination of gathering dust with reinforcing, pass through flow field, atmosphere, particle characteristics, the many aspects such as high-voltage electrostatic field realize that particulate matter is charge reinforced, breach particulate matter, the especially charged difficulty of superfine particulate matter, the low problem of carrying capacity, to realize the efficient removal of particulate matter in industrial smoke.
Description
Technical field
The invention belongs to energy-environment project pollution emission reduction technical fields, and in particular to a kind of temperature/more field strength of wet regulation
Combined Electrostatic dust pelletizing system.
Background technique
With the rapid development of economy, problem of environmental pollution is on the rise, the haze weather that all parts of the country are increasingly aggravated is more
It is to cause to seriously endanger to the health of people, the whole nation is to PM2.5Demand for control it is increasingly urgent.
The Crack cause of haze weather is mainly the fine particle that left floating high concentration in air, and the particulate matter in China is main
From fixed source emission, such as coal-burning power plant.Wherein the primary particle state pollutant of stationary source includes that may filter that particulate matter and can coagulate
Particulate matter is tied, the discharge ratio of the two is about 1:1, is one of the important sources of particulate pollutant in air.But due to that can coagulate
The generting machanism for tying particulate matter, belongs to fine particulates, in PM10And PM2.5In occupy bigger ratio, and may filter that particle
Object is compared, caused by endanger bigger, and be easier to result in haze weather.
Fine particle capturing device can be very good to avoid back corona phenomenon and vibration as a kind of novel dedusting technology
Beat deashing bring reentrainment of dust.But due to the charged relationship between grain diameter, electric precipitator is for charged insufficient
The removal efficiency of fine particulates is lower, therefore the control of the fine particles such as condensable particulate matter is difficult to reach discharge and is wanted
It asks.Simultaneously as the high concentration suspended matter that front end desulphurization system generates, including gypsum particle, silica and iron/aluminium hydrogen-oxygen
Compound etc., waste water hardness is higher, between 5116~11545mg/L, the cation in waste water be mainly the hardness such as calcium and magnesium from
Son, heavy metal ion type is more, is mainly simultaneously chloride ion containing a large amount of anion, easily causes the corruption of follow-up equipment
Erosion.
Summary of the invention
The present invention is uneven for existing flue gas pollutant emission reduction process air flow method, superfine particulate matter is charged difficult, charged
The problems such as low, removal efficiency is low is measured, a kind of Combined Electrostatic dust pelletizing system of temperature/more field strength of wet regulation is proposed.
In order to realize the above functions, the technical solution adopted by the present invention are as follows:
A kind of Combined Electrostatic dust pelletizing system of temperature/more field strength of wet regulation, the Combined Electrostatic dust pelletizing system includes sequentially
The temperature adjustment humidification system of connection, the charge reinforced system of electric precipitation final stage pulse, layering desulfurization collaboration humidification dust pelletizing system, Yi Jizeng
The wet charge reinforced system of particulate matter flowed, the temperature adjustment humidification system include temperature-reducing heat-exchange device and waste water humidifying device, drop
The outlet of warm heat-exchanger rig is connected with the import of waste water humidifying device；The charge reinforced system of electric precipitation final stage pulse includes
Several continuous electrostatic fields, the power supply of the last pole electric field in the electrostatic field are high-voltage pulse power source；The layering desulfurization association
It is connected with humidification dust pelletizing system with desulfurization wastewater pond, the charge reinforced system of particulate matter is connected with waste water tank, the waste water tank
It is connected with desulfurization wastewater pond, desulfurization wastewater pond sequentially passes through neutralization pond, flocculation basin, sedimentation basin and is connected with waste water humidifying device
Logical, the waste water tank is also connected with cyclic water tank；The charge reinforced system of particulate matter includes condenser pipe, drop spray, yin
Pole frame and cleaning spray, the drop spray, cleaning spray are connected with cyclic water tank respectively；The particulate matter is charged strong
It is equipped with heating heat-exchanger rig after change system, before chimney, the heating heat-exchanger rig is connected with temperature-reducing heat-exchange device.
Preferably, being equipped with wastewater heat exchange device between the sedimentation basin and waste water humidifying device.Desulfurization wastewater is passing through
It can choose setting heating unit before atomizer aerosol dispersion to be heated, the surface tension of liquid can be reduced, helped
In obtaining the smaller atomized drop of partial size.
Preferably, be equipped with double fluid atomization nozzle in the waste water humidifying device, the double fluid atomization nozzle and de-
Sulphur wastewater disposal basin is connected.By atomizing air atomizing, atomizing particle size is reduced, shortens the evaporation time of drop in flue, keeps away
Exempt from adherency of the drop on flue tube wall, the staggered arrangement form of nozzle can be used.
Preferably, the charge reinforced system of electric precipitation final stage pulse includes discharge electrode and dust collector pole, discharge electrode and arteries and veins
It rushes power cathode to be connected, dust collector pole is anode, ground connection；The charge reinforced system of electric precipitation final stage pulse uses high-voltage pulse power source.
Discharge electrode is made using anticorrosion special steel material, and dust collector pole is made of #502 steel.Electric precipitator takes more electric field arrangement shapes
Formula is captured under charged in the deduster and driving in electric field force of dust to polar motion is gathered dust on dust collector pole, ash charge of going forward side by side
Bucket is periodically handled.High-voltage pulse power source realizes the charged of more fully PM particle in the case of common power compared with using, reach for
The more preferable removal effect of fine particle, so that carrying capacity is able to promotion 30%~60%, so that the electrostatic of fine particulates
Removal efficiency in deduster rises 20% or more, and effectively improves arresting efficiency of the outlet particulate matter in desulfurizing tower.
Preferably, the charge reinforced system of particulate matter uses horizontal type electric dust collector, the condenser pipe is arranged horizontal
In the horn-like import of electric precipitator, the horn-like import end is equipped with two layers of airflow uniform distribution plate, its spacing control 100~
Between 150mm；For the drop sparger arrangement in airflow uniform distribution plate rear, the cathode frame is multistage stainless steel cathode frame,
And by pulse power overlapped high-frequency power supply power supply, the cleaning spray is arranged above cathode frame.By the electricity of high-energy density
Source power supply, stablizes high density energy needed for providing generation high-voltage electrostatic field and high-density particles, and charging particle amount is made to improve 20
~40% or more.
Preferably, the charge reinforced system of particulate matter uses vertical tubular wet electrical dust precipitator, the condenser pipe is set
It sets above vertical tubular wet electrical dust precipitator import, for drop sparger arrangement above condenser pipe, airflow uniform distribution plate is arranged in liquid
Drop spray top, cathode frame are arranged in above airflow uniform distribution plate, clean sparger arrangement above cathode frame.
Preferably, the condenser pipe is constituted using the stainless steel serpentine coil of 25 × 1.5mm of Φ, the airflow uniform distribution plate
Percent opening 40~50%, 30~40mm of aperture size φ, the drop spray are installed on the bracket vertical with flue gas direction, prop up
Parallel tube array is arranged on frame, the nozzle direction of drop spray is consistent with flue gas flow direction, and the spacing of pipe row is effectively sprayed no more than nozzle
Penetrate distance, the nozzle interlaced arrangement of adjacent tubes row；The nozzle of the drop spray uses finer atomization solid-cone (type) nozzle, can produce
Fine droplets of the particle size range at 50~500 μm, nozzle flow are 1~2L/min, and the spray angle of nozzle is 30 °.Guarantee
90% or more grain diameter coalescence is grown up to 0.5 μm or more.
For the cooperation-removal for promoting acid contaminant, humidification used by the drop spray in the charge reinforced system of particulate matter
Agent can be alkaline process water.Spray flow is continuously adjustable, and the spray angles of each nozzle are corrected and matched by accurate.Wet type electricity removes
Dirt device cleaning spray intermittent duty in system operation, in conjunction with the water droplet trapped in electric field to cathode frame (dust collecting pole plate)
It is rinsed.
Preferably, liquid is dispersed by the drop for 10~100 μm by atomizer, flue-gas temperature condition 90~
Between 120 DEG C, drop becomes vapor in 2s；By the humidity regulation of waste water humidifying device, dust particle in flue gas
Specific resistance is reduced to 105M~10 Ω12Within the scope of Ω m.Facilitate the dust removing effects of synergy electrostatic precipitator.Be humidified water according to
Flue gas condition is centainly adjusted, by the penetrating for the water that is humidified, so that relative humidity promotes 5~10%.
The atomized water of waste water humidifying device can use processed desulfurization wastewater, can be saved by spraying evaporation process
Water resource reduces the processing cost of desulfurization wastewater simultaneously, facilitates power plant waste water zero-emission.
Preferably, the layering desulfurization collaboration humidification dust pelletizing system is made of Multi-layer sprinkling layer, in desulfurization wastewater warp
Enter in flue with after flocculation, precipitating, is heated to 60~90 DEG C using flue residue heat；Flue gas temperature after condenser pipe reduces by 5 DEG C
More than.
The flue gas of electrostatic precipitator outlet enters layering desulfurization collaboration humidification dust pelletizing system (desulfurizing tower) by pipeline, described
Desulfurizing tower sprays lime white, efficient removing SO into flue gas by Multi-layer sprinkling device2Gas, while on smoke moisture
It rises, reaches saturation or oversaturated state.Above-mentioned slurry droplet drop is fallen behind in desulfurizing tower wastewater disposal basin, later waste water in wastewater disposal basin
It is transported to effluent settling chamber by waste water pump, larger lime slag etc. can be deposited in bottom of pond and separate with top waste water.Enter later
Flocculation basin facilitates the clarified wastewater through one by adding flocculant.Treated, and desulfurization wastewater can be heated by waste water
Unit by two-fluid spray nozzle atomized spray enters humidification unit flue after being heated up.
Preferably, the pulse power repetition rate is continuously adjustable in 0~1000Hz, rising edge of a pulse 20 μ s with
Interior, pulse width is within 50 μ s, and output voltage is continuously adjustable in -20kV~-80kV, and transient pulse power reaches 2MW or more,
Energy conversion efficiency is 80% or more.
Power-plant flue gas of the present invention enters decreasing temperature and increasing humidity system after preposition denitrification apparatus SCR and air heat exchanger,
Decreasing temperature and increasing humidity system includes temperature-reducing heat-exchange device and waste water humidifying device, reduces temperature by temperature-reducing heat-exchange device, realizes temperature
Regulation.The heat-exchanger rig can be using dividing wall type or the heat-exchanger rig of other forms, using wear-resistant material.Flue-gas temperature reduces
To reduce total flue gas flow, the flue gas flow by deduster is reduced, promotes efficiency of dust collection, by flue gas humidification system to cigarette
Humidification water is sprayed into gas, local humidity rises rapidly, and promotes the coalescence of particulate matter in flue gas, using flue-gas temperature, droplet is rapid
Evaporation uses the pulse power that can strengthen fine grain charged by electric precipitation final stage electric field, and charged fine grained improves washing and makees
With the trapping effect to particle, before saturated flue gas enters wet cottrell, made by the preferred arrangement that drop sprays ultra-fine
Drop may be uniformly distributed in system space, be sufficiently mixed and be effectively humidified with flue gas；Through electric precipitator treated cigarette
Gas enter layering desulfurization collaboration humidification dust pelletizing system, wherein sprayed slurry the oxysulfide in flue gas is deviate from it is same
When, it collides there are also certain probability with escaping particles, and then generate certain granule capturing effect.In addition, Multi-layer sprinkling can
The temperature of flue gas is reduced, the water capacity of flue gas is increased.The system can the unlatching number of plies and sprayed slurry temperature to spraying layer
It is controlled, reaches optimal by both regulations and be humidified and cooperate with dust removing effects；Last flue gas enters that humidification flows
The grain charge reinforced system of object makes particle Caragana seed pests in uniform flow field, improves particle by carrying out humidification to flue gas and flowing
Charge capacity in electrostatic field, and then the removal efficiency of high superfine particulate matter.The high-performance heat exchanger in simultaneity factor exit can
Reduce flue-gas temperature, white cigarette caused by effectivelying prevent flue-gas temperature too low and equipment etching problem.
The present invention carries out system level reinforcing to particulate matter removing from technology and design level, by temperature adjustment, humidification, flow,
Charged combinations of gathering dust with reinforcing passes through many aspects such as flow field, atmosphere, particle characteristics, high-voltage electrostatic field realization particulate matter
It is charge reinforced, the charged problem difficult, carrying capacity is low of particulate matter, especially superfine particulate matter is breached, to realize industrial smoke
The efficient removal of middle particulate matter.The present invention can effectively facilitate the coalescence of particulate matter, grow up, and reach 90% or more grain diameter
To 0.5 μm or more, charging particle amount is set averagely to improve 20% or more, final particle removal efficiency reaches 99% or more.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2；
Fig. 3 is the structural schematic diagram of the embodiment of the present invention 5.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, but invention which is intended to be protected is simultaneously
It is without being limited thereto.
Embodiment 1
Using horizontal type electric dust collector, flue gas flow 15000Nm3/s。
Referring to Fig.1, a kind of temperature/wet regulation more field strength Combined Electrostatic dust pelletizing system, the Combined Electrostatic dust pelletizing system
Including be sequentially connected to temperature adjustment humidification system, the charge reinforced system of electric precipitation final stage pulse, layering desulfurization collaboration humidification dedusting system
The charge reinforced system of particulate matter that system and humidification flow, the temperature adjustment humidification system include that temperature-reducing heat-exchange device 1 and waste water increase
The outlet of wet device 2, temperature-reducing heat-exchange device 1 is connected with the import of waste water humidifying device 2；The layering desulfurization collaboration humidification removes
Dirt system (desulfurizing tower) 4 is connected with desulfurization wastewater pond 12, and the charge reinforced system of particulate matter is connected with waste water tank 10, described useless
Water tank 10 is connected with desulfurization wastewater pond 12, and desulfurization wastewater pond 12 sequentially passes through neutralization pond 13, flocculation basin 14, sedimentation basin 15 and gives up
Water humidifying device 2 is connected, and the waste water tank 10 is also connected with cyclic water tank 11；The sedimentation basin 15 and waste water humidifying device
Wastewater heat exchange device 16 is equipped between 2, it is single that desulfurization wastewater can choose setting heating before through atomizer aerosol dispersion
Member is heated, and the surface tension of liquid can be reduced, and helps to obtain the smaller atomized drop of partial size.The particulate matter is charged
Heating heat-exchanger rig 9 is equipped with after consolidation system, before chimney, the heating heat-exchanger rig 9 is connected with temperature-reducing heat-exchange device 1
It is logical.
Double fluid atomization nozzle, the double fluid atomization nozzle and desulfurization wastewater pond 12 are equipped in the waste water humidifying device
It is connected, by atomizing air atomizing, reduces atomizing particle size, shorten the evaporation time of drop in flue, avoid droplets from
Adherency on flue tube wall can use the staggered arrangement form of nozzle.
Power-plant flue gas enters temperature adjustment and waste water humidification system after flowing through denitrification apparatus SCR and air heat exchanger, passes through
Temperature-reducing heat-exchange device reduces flue-gas temperature to the following water dew point of acid dew point or more, makes SO3Equal condensable materials matter is adsorbed in ash surface
Condensation change specific resistance raising electric precipitator working performance, temperature-reducing heat-exchange device cooled flue gas in such a way that cooling water recycles,
Dividing wall type or other heat transfer forms can be used, using wear-resistant material.Flue-gas temperature reduces to reduce total flue gas flow, reduces
By the flue gas flow of deduster, efficiency of dust collection is promoted.Waste water humidifying device is using the desulfurization wastewater generated in wet desulfuration tower
As humidification water, humidification water injection is entered among flue, so that local flue gas cools down rapidly, is sprayed using double fluid atomization nozzle
It penetrates, double fluid atomization nozzle obtains the droplet thinner compared with plain nozzle by way of introducing atomization gas, controls partial size between 10
~100 μm, evaporation time is less than 0.3s, avoids deposition of droplets in wall surface.Desulfurization wastewater as humidification water, by neutralization, flocculation,
The precipitatings such as most solid contents are removed after settling three treatment process, its heating can be made by way of heating, reduces table
Face tension reduces atomizing particle size.
The charge reinforced system of electric precipitation final stage pulse includes four continuous electrostatic fields 3, the end in the electrostatic field
The power supply of pole electric field is high-voltage pulse power source；It can strengthen fine grain charged, repetition rate should continuously may be used in 0~1000Hz
It adjusts, rising edge of a pulse is within 20 μ s, and pulse width should be within 50 μ s, and output voltage is continuous in -20kV to -80kV
Adjustable, transient pulse power can achieve 2MW or more, and energy conversion efficiency is 80% or more；Utilize charge reinforced electric discharge
System generates high-voltage electrostatic field and high density ion in system space, keeps particulate matter in flue gas and drop effectively charged, makes
It enters after subsequent contamination emission-reducing system by efficient removal；Using high-energy density power supply system, it is quiet to stablize offer generation high pressure
High density energy needed for electric field and high-density particles, and form is matched by novel power supply technique and its optimization pole, further mention
Lifting electric strength and carrying capacity.The charge reinforced system of electric precipitation final stage pulse includes discharge electrode and dust collector pole, discharge electrode with
Pulse power cathode is connected, and dust collector pole is anode, ground connection.Discharge electrode is made using anticorrosion special steel material, and dust collector pole uses #
502 steel are made, and electrostatic precipitator takes four electric field arrangement forms, under charged in the deduster and driving in electric field force of dust
It is captured to polar motion is gathered dust on dust collector pole, and enters ash bucket, periodically handled.
The layering desulfurization collaboration humidification dust pelletizing system is made of Multi-layer sprinkling layer, and electric precipitation final stage pulse is charge reinforced
The electrically charged particle escaped in system enters Multi-layer sprinkling region with flue gas, and sprayed slurry takes off to the oxysulfide in flue gas
It while out, collides there are also certain probability with escaping particles, and then generates certain granule capturing effect.In addition, multilayer
Spray can reduce the temperature of flue gas, increase the water capacity of flue gas, and flue gas is made to reach saturation state before entering next system.
The charge reinforced system of particulate matter uses horizontal type electric dust collector, and the charge reinforced system of particulate matter includes condensation
Pipe 5, fine droplets spray 6, cathode frame 8 and cleaning spray 7, fine droplets spray 6, cleaning spray 7 respectively with follow
Ring water tank 11 is connected；The condenser pipe 5 is arranged in the horn-like import of horizontal type electric dust collector, and the horn-like import end is set
There is two layers of airflow uniform distribution plate 17, its spacing is controlled in 120mm；The drop spray 6 is arranged in airflow uniform distribution plate rear, the yin
Pole frame 8 is multistage stainless steel cathode frame, and by pulse power overlapped high-frequency power supply power supply, is supplied by the power supply of high-energy density
Electricity, stablize provide generate high-voltage electrostatic field and high-density particles needed for high density energy, make charging particle amount improve 20~
40% or more.The cleaning spray 7 is arranged above cathode frame.
The condenser pipe is constituted using the stainless steel serpentine coil of 25 × 1.5mm of Φ, the airflow uniform distribution packing free ratio
45%, aperture size φ 35mm, the drop spray are installed on the bracket vertical with flue gas direction, and parallel pipe is arranged on bracket
The nozzle direction of row, drop spray are consistent with flue gas flow direction, and the spacing of pipe row is not more than the effective spray distance of nozzle, adjacent tubes row
Nozzle interlaced arrangement；The nozzle of drop spray uses finer atomization solid-cone (type) nozzle, can produce particle size range 50~
500 μm of fine droplets, nozzle flow 1.5L/min, the spray angle of nozzle are 30 °.Guarantee 90% or more grain diameter
Coalescence is grown up to 0.5 μm or more.
High-humidity gas fume after desulfurizing tower spreads through horn-like diffusing opening and reduces flow velocity, and particle in flue gas is made to remove system
Increased resident time in system, makes particle more fully be captured；Airflow uniform distribution plate can make flue gas flow field distribution more uniform, have
Conducive to the charged of particle and trapping, the operational effect of whole system is promoted；Condenser pipe makes flue-gas temperature rapid drawdown, improves the mistake of flue gas
Saturation degree, while promoting the nucleation of condensable particulate matter, condensing and grow up makes condensable particulate matter by gaseous state and 0.1 μm of grade
The long particulate matter for being greatly greater than 1 μm of fine particulates, growing up for particle size can make particle charged in high-voltage electrostatic field
More sufficiently, and then arresting efficiency is improved.In addition, condenser pipe can effectively control the temperature drop of flue gas by regulating water flow, make it
It is optimal operating status.Rectified flue gas after cooling enters fine droplets jet segment, by the preferred arrangement of injection apparatus,
The fine droplets for being atomized into humidizer are uniformly distributed in system space, be sufficiently mixed and be effectively humidified with flue gas.One side
Face, the characteristic fast using droplets rate, carrying capacity is big can be such that it charges rapidly in high-voltage electrostatic field, and in flue gas
Particulate matter collide and combine, keep particulate matter charged, so make particulate matter in conjunction with drop after property to being conducive to charged side
To changing, the charged rate of particle and carrying capacity is made all to be significantly improved；On the other hand, the raising of smoke moisture is not only
Be conducive to the condensation growth of condensable particulate matter, can also make the wet flue gas into high-voltage electrostatic field in electrohydrodynamic (EHD)
Condense out small water droplet under effect, migrate after a large amount of condensing water droplet is charged to pole plate, and form one layer of uniform water film, can play
The effect of deashing is assisted, and then saves the dosage of flushing water.Flue gas after two stages pretreatment subsequently enters electrion and gathers dust
Section, the section are made of multistage stainless steel cathode frame, and by the power supply power supply of high-energy density, are stablized and provided generation high-pressure electrostatic
High density energy needed for field and high-density particles, and form is matched by novel power supply technique and its optimization pole, further promotion
Strength of discharge, to improve the charged rate and carrying capacity of particle；Spray intermittent duty in system operation is cleaned simultaneously,
For cleaning dust collecting pole plate, the condensed water for promoting to be formed since EHD is utilized can greatly reduce the water consumption of rinse-system.It is complete
Enter heating heat-exchanger rig 9 (post-processing section) at the clean flue gas after particulate removal, which is made of pipe heat exchanger, removes with electricity
The preposition temperature-reducing heat-exchange device 1 of the charge reinforced system of dirt final stage pulse communicates, and here for improving flue-gas temperature, effectively prevent
White cigarette caused by flue-gas temperature is too low and equipment etching problem.
After the system, the removal efficiency that is averaged of the particulate matter in flue gas reaches 99.99% or more, granular material discharged concentration
Less than 0.5mg/m3, SO2Concentration of emission is less than 3mg/m3。
Embodiment 2
Using vertical tubular wet electrical dust precipitator, flue gas flow 1000Nm3/s。
Referring to Fig. 2, the present embodiment is with 1 difference of embodiment: the charge reinforced system of particulate matter uses vertical tubular
Wet electrical dust precipitator, the condenser pipe 5 are arranged above vertical tubular wet electrical dust precipitator import, and drop spray 6 is arranged in cold
Solidifying 5 top of pipe, airflow uniform distribution plate 17 are arranged in 6 top of drop spray, and cathode frame 8 is arranged in 17 top of airflow uniform distribution plate, clearly
Washing and spraying 7 is arranged in 8 top of cathode frame.
Power-plant flue gas enters temperature adjustment and waste water humidification system after denitrification apparatus SCR and air heat exchanger, passes through
Temperature-reducing heat-exchange device reduces flue-gas temperature to the following water dew point of acid dew point or more, makes SO3Equal condensable materials matter is adsorbed in ash surface
Condensation changes specific resistance and improves electric precipitator working performance；By the ash-laden gas of electric precipitation, most of particle is captured, a small number of
Fine grained can be strengthened due to charged difficult escape, by electric precipitation final stage electric field using the pulse power fine grain charged；Escape
Charged fine grained enter layering desulfurization collaboration humidification dust pelletizing system, improve cleaning function to the trapping effect of particle, simultaneously
Flue gas is humidified to saturation conditions by desulfurizing tower；Before saturated flue gas enters wet cottrell, by the raising that further cools down
Cooling device so that the rapid condensation of ultra-fine grain is grown up, while being designed to there is the structure flowed by flue gas degree of supersaturation,
It can guarantee the optimum working performance of wet cottrell.
After the system, the removal efficiency that is averaged of the particulate matter in flue gas reaches 99.9% or more, granular material discharged concentration
Less than 1mg/m3, SO2Concentration of emission is less than 5mg/m3。
Embodiment 3
Using horizontal type electric dust collector, flue gas flow 15000Nm3/s。
System is as described in Example 1, and two layers of airflow uniform distribution plate spacing is controlled in 100mm, airflow uniform distribution packing free ratio 40%,
Aperture size φ 30mm, the nozzle flow of drop spray are 1L/min.
After the system, the removal efficiency that is averaged of the particulate matter in flue gas reaches 99.9% or more, granular material discharged concentration
Less than 1mg/m3, SO2Concentration of emission is less than 6mg/m3。
Embodiment 4
Using horizontal type electric dust collector, flue gas flow 15000Nm3/s。
System is as described in Example 1, and two layers of airflow uniform distribution plate spacing is controlled in 150mm, airflow uniform distribution packing free ratio 50%,
Aperture size φ 40mm, the nozzle flow of drop spray are 2L/min.
After the system, the removal efficiency that is averaged of the particulate matter in flue gas reaches 99.5% or more, granular material discharged concentration
Less than 1mg/m3, SO2Concentration of emission is less than 8mg/m3。
Embodiment 5
Using horizontal type electric dust collector, flue gas flow 15000Nm3/s。
Referring to Fig. 3, system is as described in Example 1, does not have wastewater heat exchange device between sedimentation basin 15 and waste water humidifying device 2
16。
After the system, the removal efficiency that is averaged of the particulate matter in flue gas reaches 99.5% or more, granular material discharged concentration
Less than 1mg/m3, SO2Concentration of emission is less than 5mg/m3。
Claims (6)
1. a kind of temperature/wet regulation more field strength Combined Electrostatic dust pelletizing system, it is characterised in that: the Combined Electrostatic dust pelletizing system
Including be sequentially connected to temperature adjustment humidification system, the charge reinforced system of electric precipitation final stage pulse, layering desulfurization collaboration humidification dedusting system
The charge reinforced system of particulate matter that system and humidification flow, the temperature adjustment humidification system include that temperature-reducing heat-exchange device and waste water increase
The outlet of wet device, temperature-reducing heat-exchange device is connected with the import of waste water humidifying device；The electric precipitation final stage pulse is charged strong
Change system includes several continuous electrostatic fields, and the power supply of the last pole electric field in the electrostatic field is high-voltage pulse power source；It is described
Layering desulfurization collaboration humidification dust pelletizing system is connected with desulfurization wastewater pond, and the charge reinforced system of particulate matter is connected with waste water tank,
The waste water tank is connected with desulfurization wastewater pond, and desulfurization wastewater pond sequentially passes through neutralization pond, flocculation basin, sedimentation basin and waste water and is humidified
Device is connected, and the waste water tank is also connected with cyclic water tank；The charge reinforced system of particulate matter includes condenser pipe, drop
Spray, cathode frame and cleaning spray, the drop spray, cleaning spray are connected with cyclic water tank respectively；The particle
Heating heat-exchanger rig, the heating heat-exchanger rig and temperature-reducing heat-exchange device phase are equipped with after the charge reinforced system of object, before chimney
Connection；
Wastewater heat exchange device is equipped between the sedimentation basin and waste water humidifying device；
The charge reinforced system of electric precipitation final stage pulse includes discharge electrode and dust collector pole, discharge electrode and pulse power cathode phase
Even, dust collector pole is anode, ground connection；The charge reinforced system of electric precipitation final stage pulse uses high-voltage pulse power source；
The charge reinforced system of particulate matter uses horizontal type electric dust collector or vertical tubular wet electrical dust precipitator, is removed using Horizontal electric
When dirt device, the condenser pipe is arranged in the horn-like import of horizontal type electric dust collector, and the horn-like import end is equipped with two layers of gas
Flow uniform board；When using vertical tubular wet electrical dust precipitator, the condenser pipe is arranged in vertical tubular wet electrical dust precipitator import
Top, for drop sparger arrangement above condenser pipe, airflow uniform distribution plate is arranged in drop spray top；
The condenser pipe is constituted using the stainless steel serpentine coil of 25 × 1.5mm of Φ, and the airflow uniform distribution packing free ratio 40~
30~40mm of 50%, aperture size φ, the drop spray are installed on the bracket vertical with flue gas direction, cloth horizontalization on bracket
The nozzle direction of row pipe row, drop spray are consistent with flue gas flow direction, and the spacing of pipe row is not more than the effective spray distance of nozzle, adjacent
The nozzle interlaced arrangement of pipe row；The nozzle of the drop spray uses finer atomization solid-cone (type) nozzle, and nozzle flow is 1~2L/
Min, the spray angle of nozzle are 30 °；
The layering desulfurization collaboration humidification dust pelletizing system is made of Multi-layer sprinkling layer, and desulfurization wastewater is neutralized, flocculates, after precipitating
Into in flue, 60~90 DEG C are heated to using flue residue heat；Flue gas temperature after condenser pipe reduces by 5 DEG C or more.
2. temperature according to claim 1/wet regulation more field strength Combined Electrostatic dust pelletizing system, it is characterised in that: described
Double fluid atomization nozzle is equipped in waste water humidifying device, the double fluid atomization nozzle is connected with desulfurization wastewater pond.
3. temperature according to claim 1/wet regulation more field strength Combined Electrostatic dust pelletizing system, it is characterised in that: described
The charge reinforced system of particulate matter uses horizontal type electric dust collector, and two layers of airflow uniform distribution plate spacing control is between 100~150mm；Institute
Drop sparger arrangement is stated in airflow uniform distribution plate rear, the cathode frame is multistage stainless steel cathode frame, and by the pulse power
Overlapped high-frequency power supply power supply, the cleaning spray are arranged above cathode frame.
4. temperature according to claim 1/wet regulation more field strength Combined Electrostatic dust pelletizing system, it is characterised in that: described
The charge reinforced system of particulate matter uses vertical tubular wet electrical dust precipitator, and cathode frame is arranged in above airflow uniform distribution plate, cleaning
Sparger arrangement is above cathode frame.
5. temperature according to claim 2/wet regulation more field strength Combined Electrostatic dust pelletizing system, it is characterised in that: pass through
Liquid is dispersed into the drop for 10~100 μm by atomizer, between 90~120 DEG C of flue-gas temperature condition, is increased by waste water
The humidity regulation of wet device, the specific resistance of dust particle is reduced within the scope of 105 Ω of Ω m~1012 m in flue gas.
6. temperature according to claim 1/wet regulation more field strength Combined Electrostatic dust pelletizing system, it is characterised in that: described
Pulse power repetition rate is continuously adjustable in 0~1000Hz, rising edge of a pulse within 20 μ s, pulse width within 50 μ s,
Output voltage is continuously adjustable in -20kV~-80kV.
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