CN106731402A - Metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system - Google Patents

Abstract

The present invention relates to metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system, including spraying spray scrubber, downstriker gas-liquid foam suspension air swirl dehydrating tower and upstriker wet electrostatic deep purifier, the spraying spray scrubber upper end outlet is connected flue connection with end entrance on downstriker gas-liquid foam suspension air swirl dehydrating tower by increasing mist formula, the downstriker gas-liquid foam suspension air swirl dehydrating tower lower end outlet is connected with upstriker wet electrostatic deep purifier lower inlet by being connected flue, the spraying spray scrubber is the wet type multilayer gas-liquid counter current way of contact, the downstriker gas-liquid foam suspension air swirl dehydrating tower is gas-liquid co-current contact mode, spraying spray scrubber bottom side of the wall is provided with smoke-intake pipe road, the upper end of upstriker wet electrostatic deep purifier is provided with aiutage.The present invention effectively improves clearance of the purifier to fine particle, makes it that ultralow smoke dust discharge concentration is stably reached under the conditions of low energy consumption, meets stricter environmental pollution and administers emission request.

Description

Metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system

Technical field

It is dirty for air the present invention relates to metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system Dye preventing and treating, belongs to flue-gas dust-removing and desulfurization and gas purification technique field.

Background technology

Dust-laden steam stream flue gas is the common disposal of pollutants flue gas of the industries such as chemical industry, building materials, Ferrous Metallurgy, slag processing mistake Journey is one of dust-laden typical occurring source of steam stream flue gas.High-temperature slag is produced when by quick water quenching during Slag treatment Substantial amounts of superheated steam, steam carries under one's arms the diffusion of slag micronic dust unavoidably.Its main component is metal oxide particle, water steaming Gas, pollutes to regional environment.With≤steel industry atmosphere pollutants emission standardses >=implementation, particularly key area Prevention and control of air pollution action plan implement, the requirement of atmosphere pollution special emission limit is further strict, efficient removal Slag treatment The harmful substances such as the fine particle in the dust-laden steam stream flue gas that process is produced, strengthen respirable dust, particularly fine grained Thing（PM2.5）Improvement it is imperative.

Generally, cloth bag, sintered plate and electric cleaner are all the high-effective dust-removing technologies of current mature and reliable, are applied to Slag treatment The dust-laden steam stream flue-gas dust removal and purification that process is produced, can reach 30mg/Nm3, but shortcoming is also obvious：Not only invest and run Costly, occupation of land is big, and the cycle is long during construction, and the most important is that the tail gas water capacity is up to 13~24%, is carried under one's arms Dust is the superfine powder of slag, and property is similar with concrete, with the hydraulicity and the solidifying property of glue (knot), sinks knot in cloth bag or modeling Burn on the internals such as plate filter material micropore Inner Ge electrodes, plate and be difficult to clear up.

Generally individually use on the internals such as wet electrical dust precipitator, electrode, plate easily fouling and be difficult to clear up.

Wet dust removal scheme is used for high temperature, high humidity and the gas cleaning dedusting with the hydraulicity and the solidifying property of glue (knot), technique Simply, investment and operating cost are low, easily implement, and can reach maximizing the benefits purpose.

But under dust-laden steam stream exhaust gas dust size distribution, due to percentage by volume shared by pellet compared with Height, common Wet-type spray scrubbing tower to pellet and the relatively low of aerosol clearance on the other hand, usual Wet-type spray Scrubbing tower uses mechanical demisting before exhanst gas outlet, only has preferably to more than the 40 μm free water spray films drop carried under one's arms in flue gas Clearance, but to micron order fine particle in flue gas, it is difficult to adapt to more and more strict atmosphere pollutants emission standardses or tighter The regional environmental quality control standard of lattice；And runtime also easily fouling, system runner is blocked or penalty；

Usual Wet-type spray scrubbing tower, circular water treating system floor space is big, one-time investment is high, sedimentation tank mud amount big, clear The operating cost such as become silted up, transport, processing is high；Particularly high concentration suspension easily blocks runner.

The Wet-type spray scrubbing tower of new generation treatment dust-laden steam stream flue gas for generally improving is often thin to improve system trapping The ability of particulate matter, reaches udst separation efficiency higher and uses big liquid-gas ratio overwass, and quantity of circulating water is big, purifier And system dampness is high, increase energy consumption.Spray section superficial linear velocity in a column is relatively low, and tower diameter is larger, and Ta Neibu liquid is difficult to uniformly, system operation Efficiency poor reliability etc..

The content of the invention

For drawbacks described above, removed it is an object of the invention to provide a kind of high temperature, high humidity, high viscosity characteristic flue gas of adapting to Dirt is purified, and the steam stream flue-gas dust removal and purification that slag processing process is produced especially is adapted to, by high-efficient wet-type unsteady flow udst separation Influence of the fouling high to purifier and system dust removing component is effectively solved, then concatenates wet electrostatic advanced purification system, effectively Purifier is improved to the clearance of fine particle, makes it that ultralow soot emissions are stably reached under the conditions of low energy consumption dense Degree, meets metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic depth that stricter environmental pollution administers emission request Degree cleaning system.

For this technical solution adopted in the present invention is：

It is net including spraying spray scrubber, downstriker gas-liquid foam suspension air swirl dehydrating tower and upstriker wet electrostatic depth Change device, the spraying spray scrubber upper end outlet passes through with end entrance on downstriker gas-liquid foam suspension air swirl dehydrating tower Increase the connection flue connection of mist formula, the downstriker gas-liquid foam suspension air swirl dehydrating tower lower end outlet is quiet with up rotating vane type Electric deep purifier lower inlet is connected by connecting flue, and the spraying spray scrubber is contacted for wet type multilayer gas-liquid counter current Mode, the downstriker gas-liquid foam suspension air swirl dehydrating tower is gas-liquid co-current contact mode, under spraying spray scrubber Side wall is provided with smoke-intake pipe road, and the upper end of upstriker wet electrostatic deep purifier is provided with aiutage.

Used as the further improvement of above-mentioned technical proposal, smoke-intake pipe road enters tower mouthful top in the spraying spray scrubber The solidifying trapping area of mist, spraying spray washing area and primary gas-liquid separation and aerosol preregulator area, the mist are sequentially provided with from bottom to top Venturi injection intercept layer is provided between solidifying trapping area and spraying spray washing area, the mist is provided with one group of double fluid in solidifying trapping area Spray gun body or one group thin liquid mist spray gun or one group of double-current spray gun body are combined with thin liquid mist spray gun, in the spraying spray washing area certainly If dried layer spraying spraying layer is provided with lower, the spraying spraying layer is made up of spray gun and nozzle, the spraying spraying layer of top Nozzle be unidirectional nozzle, downwards, the nozzle of other spraying spraying layers is bi-directionally or uni-directionally nozzle, the primary gas-liquid point in direction From with aerosol preregulator area in be provided with primary gas-liquid separation and aerosol preregulator, the primary gas-liquid separation and aerosol preregulator area Smoke inlet top be provided with double-current spray gun body, the airflow section face in the primary gas-liquid separation and aerosol preregulator area Airflow area of section of the product more than spraying spraying layer.

Used as the further improvement of above-mentioned technical proposal, the nozzle of other spraying spraying layers is bi-directionally or uni-directionally nozzle Can be single unidirectional or two-way water smoke hollow cone nozzle or single unidirectional or two-way water smoke solid nozzle, nozzle sprays along spraying Drench the upper and lower arranged for interval in scrubbing tower center, the bi-directionally or uni-directionally nozzle of other spraying spraying layers can for several are unidirectional or Two-way hydraulic spray nozzle, the nozzle plane projection of adjacent spraying spraying layer is staggered in alternate.

Used as the further improvement of above-mentioned technical proposal, the venturi sprays intercept layer by more than two-layer or two-layer non-etc. Section Venturi rod gate layer composition, the non-constant section Venturi rod gate layer is by some solid poles or some hollow circular-tubes same Equidistant in one plane to rearrange, the rod grid section cloth column direction of adjacent non-constant section Venturi rod gate layer is identical and in alternate It is staggered, the rod grid cross sectional shape of every layer of non-constant section Venturi rod gate layer is identical and cloth column direction is identical, most one layer of bottom The rod grid area of section of non-constant section Venturi rod gate layer is less than its adjacent last layer rod grid area of section.

Used as the further improvement of above-mentioned technical proposal, the lower end of the spraying spray scrubber is provided with spraying spray washing Tower dirt collecting bucket, the lower end of the spraying spray scrubber dirt collecting bucket is connected with shallow-layer formula primary plaster and precipitates by blow-off line Device, the shallow-layer formula primary plaster settling vessel cuts out including inversed taper platform build muddy water shallow layer tank, Shaftless screw conveyor and dirt mud Pipeline, the inversed taper platform build muddy water shallow layer tank lower end is connected with the input of Shaftless screw conveyor, and the dirt mud cuts out pipe The upper end in road is connected with the output end of Shaftless screw conveyor, and the side of the frustum build muddy water shallow layer tank is provided with after just separating Spraying spray scrubber muddy water floss hole.

Used as the further improvement of above-mentioned technical proposal, the downstriker gas-liquid foam suspension air swirl dehydrating tower includes Descending washing separator and the inward turning flue of reverse spray type foam suspension being sequentially connected from top to bottom, under the reverse spray type foam suspension The smoke inlet end of row washing separator is connected flue connection, the descending washing separator of reverse spray type foam suspension with mist formula is increased If being inside sequentially provided with water smoke suspension foam maker, the export-oriented spiral board of dried layer and eddy flow dewatering cavity, the water smoke from top to bottom Suspension foam maker is made up of one group of water fog spraying gun and hydraulic spray nozzle, and hydraulic spray nozzle injection direction is inverse cigarette airflow direction, water Atomizing nozzle washing separator inlet cross-sectional distance descending with reverse spray type foam suspension is more than 1.3 meters, the eddy flow dewatering cavity lower end Blowdown inclined clapboard is provided with, the inward turning flue upper end is through blowdown inclined clapboard and is higher by blowdown inclined clapboard plate face, blowdown inclined clapboard Eddy flow dehydration cavity outer wall above lower end is provided with muddy water floss hole, is provided with positioned at eddy flow dewatering cavity directly over the inward turning flue Interior water fog generator, the lower end of the inward turning flue is provided with dehydrator dirt collecting bucket, and the dehydrator dirt collecting bucket lower end is provided with de- Hydrophone muddy water floss hole.

As the further improvement of above-mentioned technical proposal, blower fan power station, the blower fan are installed on the connection flue Power station includes blower fan, motor and control system, and the upstriker wet electrostatic deep purifier includes upper chamber and lower chamber, Corona electrode system and precipitation electrodes system are provided between the upper chamber and lower chamber, the upper chamber and lower chamber are loudspeaker Mouth formula and both horn mouths are relative, reverse V-shaped air distributor, part on the lower chamber are provided with the lower chamber in part If being provided with dried layer flue gas even distribution device, exhanst gas outlet constant-current stabilizer, the exhanst gas outlet constant-current stabilizer are provided with the upper chamber Lower section is provided with the flusher in upper chamber, and the upper chamber is externally provided with some electric insulation casees, and the electric insulation case is used Electrical heating inside holding form, at 100-120 DEG C, the lower chamber lower end is connected with wet electrostatic deep purifier cigarette to temperature control Gas entrance, the lower end of the wet electrostatic deep purifier smoke inlet is provided with sewage draining exit, the connection flue and wet electrostatic The side wall of deep purifier smoke inlet is tangentially connected.

Used as the further improvement of above-mentioned technical proposal, the reverse V-shaped air distributor includes support frame and installed in branch The blast cap of support upper end, the blast cap include inverted cone and it is some be connected with inverted cone base and equally distributed blade, The flue gas even distribution device includes some beading rods being evenly distributed in same level, if being serially connected with the beading rod Dry spherical surface body, the spherical surface body is nonmetallic solid or hollow spheric body, and the beading rod is the solid or sky of metal material Core bar part or the rod member of the outer preservative treatment of metal material, the exhanst gas outlet constant-current stabilizer uniformly open round-meshed plate for a surface Face, the plate face is metal or non-metal anti-corrosion material, and the flusher includes some shower nozzles, some shower nozzle gaps Injection, the corona electrode system is made up of some titanium alloy cathode lines, and the precipitation electrodes system is by some boundling honeycomb ducts Composition.

Used as the further improvement of above-mentioned technical proposal, the flue gas even distribution device both up and down is provided with some being uniformly distributed Water smoke or air water mist generation device.

As the further improvement of above-mentioned technical proposal, the smoke-intake pipe road horizontal by 12-16 °, smoke-intake pipe road Way in is down.

It is an advantage of the invention that：

（1）Udst separation efficiency high of the present invention to flue gas.10 μm of powder are less than in the dust-laden steam stream flue gas that slag processing is produced Grit footpath accounts for percentage by volume about 32-44%.Even if the Wet-type spray purifying column of usual optimization design is removed for gas cleaning Dirt, due to using common wet dust removal structure, it is only 60%-72% to the classification efficiency that particle diameter is 0--5 μm of fine particle, The dust-laden total efficiency of dust collection of steam stream flue gas that the slag processing higher to percentage by volume shared by suction particulate matter is produced is less than 90%.The special emission limit requirement of atmosphere pollution can not be stably reached, stricter emission request is reached, its is improved right Particle diameter is to turn into key problem in technology less than the classification efficiency of 10um particulate matters.Flue gas wet dust removal purification techniques of the present invention is respectively adopted The solidifying trapping of mist, the speed-raising injection of non-constant section Venturi rod grid combination layer form froth bed, spraying spray washing and primary gas-liquid point From presetting with aerosol, then through the descending washing separator of reverse spray type foam suspension of water smoke suspension foam column, make exhanst gas outlet Dust concentration≤30mg/Nm3, can be formed in flue gas fouling solid particles thing concentration drop bottom to after extremely low fouling risk scope again Concatenation wet static dedusting unit, multistage demisting unit, step by step, crescendo, the clean technology of multistage dedusting dehydrating demisting effectively promotees Enter and accelerate gas-solid-liquid three phase dynamic efficiently mix, condense, aqueous vapor separate, improve classification of the system and device to fine particle and remove Dirt efficiency and gas udst separation efficiency.Branch art, flue dust row of the present invention are purified compared to the modern flue gas wet dust removal for generally improving Put concentration and can reach≤5mg/Nm3；

（2）Low energy consumption operation characteristic of the present invention is notable.Metallurgical slag processing procedure flue gas wet type unsteady flow dedusting and wet electrostatic depth Purifier system, compares under identical outlet drain concentration, compared to the modern flue gas wet dust removal purifier for generally improving and It is low by 20% that system always hinders damage；Due to being provided with double-current spray gun body or thin in the solidifying section of mist and primary gas-liquid separation and aerosol preregulator area Liquid mist spray gun, improves non-constant section Venturi rod grid combination layer, spraying spray washing area and reverse spray type foam suspension is descending washes The dedusting classification efficiency of separator and system to fine particle is washed, so as to change generally in the section in spray washing section The way of big liquid-gas ratio transition washing is used to reach udst separation efficiency higher, is issued in lower liquid-gas ratio higher Udst separation efficiency, reduce the internal circulating load of circulation fluid.So as to reduce total power consumption of system for wet purification.Compared to generally wet Formula spray scrubber cleaning system is used for dedusting, and liquid-gas ratio can reduce 24% under equal conditions, just can reach preferable efficiency of dust collection. Due to the reduction of internal circulating load, exhaust gas volumn is constant, and liquid-gas ratio is reduced, and purifier and system dampness are accordingly reduced, also just reduced Fan energy consumption.Compared with usual Wet-type spray scrubbing tower, in the case that total spray liquid measure is constant, and due to reducing spray washing layer Liquid-gas ratio, then total power consumption of detergent circulator can reduce, by spraying drench scrubber layer spray liquid measure account for the 80% of total amount of liquor Meter, then power consumption decline 4%.

Rearmounted downstriker gas-liquid foam suspension air swirl dehydrating tower, using the descending washing separator of reverse spray type foam suspension Combined with inward turning cylinder, gas-liquid two-phase is contacted in high speed anti-phase turbulent flow in the descending washing separator of reverse spray type foam suspension, not only profit With gas phase energy, and liquid phase energy is effectively utilized, highlights low-energy-consumption high-efficiency operation characteristic；Under reverse spray type foam suspension Low energy consumption dehydrating demisting is realized in the combination of eddy flow dewatering cavity in row washing separator.

（3）Anti-stick of the present invention, scale-preventing performance are stable, prominent.It is more suitable for the dust-laden steam stream cigarette of slag processing generation The purification process of gas characteristic.The dust-laden steam stream smoke moisture that slag processing is produced is big, and water capacity is up to：13%--24%, is held under the arm The dust of band is the superfine powder of slag, with the hydraulicity and adhesion, easily occurs fouling in cleaning equipment, and flow resistance increases. By dust content high and low dust content, coarseparticulate removal and fine particle removal purification are placed in double tower+wet electricity the present invention Unit is completed.Non-constant section Venturi rod grid group is set in preposition spraying spray scrubber, is provided with by Venturi rod grid group bottom The solidifying trapping area of mist, persistently provides the preferable water mists of water quality, and the region is bubbling mass transfer area, the contact of gas-liquid turbulent flow, flue gas The energy of flow increases, and dust content area efficient high is removed not without other components in addition to non-constant section Venturi rod grid group in tower There is stronger anti-stick, scale-preventing performance again while except coarseparticulate；Rearmounted downstriker gas-liquid foam suspension air swirl Dehydrating tower, the descending washing separator of reverse spray type foam suspension is combined with inward turning cylinder, and gas-liquid counter current contact, turbulent flow contact strength is strong It is strong；Air swirl, gas-liquid mixed agglomeration separation effectively improves the particle diameter width of removal spray film drop, effectively improves going for free water Except rate, the fouling risk of rearmounted unit is also further reduced；Rearmounted wet static dedusting unit is set to have in low dust content region The standby superpower fine particle removal knot part such as purifying rate and Inner portions pole plate is less scaling, failure, Long-Term Properties stabilization.One side Face solves dust content flue gas high and is directly entered wet static dedusting device treatment, and pole pipe net sectional area is big, plant area Area is big, invests problem high, on the other hand dust content high is separated by preposition efficient low-resistance udst separation process efficient, The scaling rate and risk of successive depths cleaning unit is greatly lowered, wet static dedusting technique is removed for fouling operating mode high Dirt dehydrating demisting is possibly realized；Fouling operating mode wet dedusting technique high is also set to reach ultra-clean fume emission simultaneously.Otherwise, use The common hot and humid fouling operating mode flue gas of wet dedusting PROCESS FOR TREATMENT, exports dust concentration >=80mg/Nm3, and wet electrostatic is removed The component foulings such as dirt technique Inner portions pole plate, failure risk increase, cause system to be difficult for long-term stable operation, or even paralysis.

（4）Wet electrostatic device for deep cleaning smoke inlet water conservancy diversion current-equalizing system optimizes.Through step by step, crescendo, multistage dedusting The dust-laden vapor stream flue gas of dehydrating demisting, from upstriker wet electrostatic deep purifier bottom smoke inlet, into bottom flue gas Plenum chamber, Minus speed current stabilization it is up, then through the equal distribution system of flue gas rectification by reverse V-shaped air distributor, blast cap and even cloth etc. The blade of shape is by flue gas segmentation and diversion, and outer rim expands in wet electrostatic device for deep cleaning lower chamber back taper bucket shape space Dissipate, uniform rising, flue gas even distribution device again through being set on lower chamber section force air flow guiding to be distributed, its flue gas even distribution device It is made up of some sphericals, spherical beading rod assembly, the air-flow of turnover electric field is formed uniform speed airflow, reduces negative electrode system Rocking for system, improves the demisting efficiency of electrostatic precipitator.In wet electrostatic device for deep cleaning lower chamber inlet horn and sun Between pole pipe beam, spray-type humidifier is provided with, makes to enter-walk humidification, coalescence into the dust-laden vapor stream flue gas before electric field, while The spherical of the equal distribution system of flue gas rectification, spherical beading rod surface is formed the liquid film layer of moistening, be allowed to be difficult dust fouling, To adapt to fouling system high;Meanwhile, compared to common plate hole formula, corrugated plate dst, concatenated and formed by spherical, spherical beading rod Flue gas rectification uniform system airflow distribution flow resistance it is small;Flue gas is in the space that spherical group is formed along the rotation of spheroid face during upstream Diverging is uniform, its flue gas even distribution superior performance, also enables that the equal distribution system of flue gas rectification clears up replacing and works convenient simple, Spherical is serially connected on spherical beading rod, and its gap is adjustable, spherical quantity can increased or decreased, be easy to by simulated test determine Percent opening, after being easy to be completed the cold conditions airflow uniform distribution Adjustment Tests that carry out increase and decrease spherical quantity baffle quantity and Change distribution of the spacing optimization airflow in electric field, deduster is operated in a state for being conducive to dedusting.

（5）Present system floor space is small, and cost of investment and operating cost are low.Preposition spraying spray scrubber, one-level Udst separation efficiency is more than 95%, and bulky grain dirt mud occupies larger specific gravity in outer spoil disposal water.Due to setting this patent in its tower bottom Plastic state plaster is received to obtain in signified shallow-layer formula primary plaster settling vessel outlet, is easy to convey, is transported and later stage disposal；So that into circulation The suspension mass concentration of water treatment system is greatly lowered, the circulating water treatment system with usual flue gas wet dust removal cleaning system System is compared, and circular water treating system floor space reduces by 1/3, comprehensive water treatment system operating cost and reduces 40%, and sludge volume subtracts Few more than 40%, dirt mud processing cost reduces 30%, while mitigating significantly because high suspended matter mass concentration muddy water enters circulating water pipe The phenomenons such as abrasion, fouling, burn into blocking that net system is brought.The tower of processing unit three is concatenated, and compact in design, floor space is compared Usual spray column is small, and due to using reducing tower, spraying spray section superficial linear velocity in a column is higher, and tower diameter is smaller, due to primary gas-liquid point Amplify from aerosol preregulator area section, primary gas-liquid separation efficiency high;Due to system use by it is thick to smart udst separation step by step, Udst separation intensity gradually becomes the clean technology of strong, multistage dedusting dehydrating demisting, and dust content high is passed through into preposition efficient low-resistance Udst separation process efficient is separated, and the occupation of land and investment of subsequent wet electrostatic depth cleaning unit is greatly lowered, in identical Under the conditions for the treatment of air quantity, capital cost, equipment investment expense is below oneself technology.

（6）The all spray guns of apparatus of the present invention are provided with floor installation on outer tower wall, and one is equipped with single spray gun barral of a gun Or several nozzles, operating personnel can be to the overall maintenance replacing of spray gun implementation or dismounting outside tower.Realize that online shutdown dismounts inspection Repair, enter without personnel and maintenance is dismounted in tower, improve the working condition of operation maintainer, it is swift to operate, safe and reliable.

Brief description of the drawings

Fig. 1 is structural representation of the invention.

Fig. 2 is the structural representation of reverse V-shaped air distributor in Fig. 1.

Fig. 3 is the upward view of Fig. 2.

In figure 1 be increase mist formula connection flue, 2 be connection flue, 3 be smoke-intake pipe road, 4 be aiutage, 5 be venturi injection Intercept layer, 6 be double-current spray gun body, 7 be thin liquid mist spray gun, 8 be spraying spraying layer, 9 be primary gas-liquid separation and aerosol preregulator, 10 it is spraying spray scrubber dirt collecting bucket, 11 be blow-off line, 12 be inversed taper platform build muddy water shallow layer tank, 13 is defeated shaftless screw Send machine, 14 be dirt mud cut out pipeline, 15 be spraying spray scrubber muddy water floss hole, 16 be the descending washing of reverse spray type foam suspension Separator, 17 be inward turning flue, 18 be water smoke suspension foam maker, 19 be export-oriented spiral board, 20 be eddy flow dewatering cavity, 21 Be blowdown inclined clapboard, 22 be muddy water floss hole, 23 be water fog generator, 24 be dehydrator dirt collecting bucket, 25 be dehydrator muddy water row Put mouth, 26 be blower fan power station, 27 be upper chamber, 28 be lower chamber, 29 be corona electrode system, 30 be precipitation electrodes system, 31 be reverse V-shaped air distributor, 32 be flue gas even distribution device, 33 be exhanst gas outlet constant-current stabilizer, 34 be flusher, 35 be electricity Insulated case, 36 be wet electrostatic deep purifier smoke inlet, 37 be sewage draining exit, 38 be support frame, 39 be inverted cone, 40 be Blade, 41 be water smoke or air water mist generation device, 42 be muddy water discharge liquid packing, I be spraying spray scrubber, II be downstriker Gas-liquid foam suspension air swirl dehydrating tower, III are that upstriker wet electrostatic deep purifier, A are that the solidifying trapping area of mist, B are sprayings Spray washing area, C are primary gas-liquid separation and aerosol preregulator area.

Specific embodiment

Metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system, including spraying spray scrubber I, Downstriker gas-liquid foam suspension air swirl dehydrating tower II and upstriker wet electrostatic deep purifier III, the spraying spray are washed Wash the upper end outlet of tower I and be connected flue 1 by increasing mist formula with end entrance on downstriker gas-liquid foam suspension air swirl dehydrating tower II Connection, the lower end of downstriker gas-liquid foam suspension air swirl dehydrating tower II outlet and upstriker wet electrostatic deep purifier III lower inlet is connected by connecting flue 2, and the spraying spray scrubber I is the wet type multilayer gas-liquid counter current way of contact, institute Downstriker gas-liquid foam suspension air swirl dehydrating tower II is stated for gas-liquid co-current contact mode, the lower end side of spray scrubber I of spraying Wall is provided with smoke-intake pipe road 3, and the upper end of upstriker wet electrostatic deep purifier III is provided with aiutage 4.

The tower mouthful top that enters in smoke-intake pipe road 3 is sequentially provided with the solidifying trapping area of mist from bottom to top in the spraying spray scrubber I A, spraying spray washing area B and primary gas-liquid separation and aerosol preregulator area C, the solidifying trapping area A of the mist and spraying spray washing Venturi injection intercept layer 5 is provided between area B, one group of double-current spray gun body 6 or one group of thin liquid mist are provided with the solidifying trapping area A of the mist Spray gun 7 or one group of double-current spray gun body 6 are combined with thin liquid mist spray gun 7, are provided with some from bottom to top in the spraying spray washing area B Layer spraying spraying layer 8, the spraying spraying layer 8 is made up of spray gun and nozzle, and the nozzle of the spraying spraying layer 8 of top is unidirectional Nozzle, downwards, the nozzle of other spraying spraying layers 8 is bi-directionally or uni-directionally nozzle, and the primary gas-liquid separation is pre- with aerosol in direction The flue gas of primary gas-liquid separation and aerosol preregulator 9, the primary gas-liquid separation and aerosol preregulator area C is provided with Tiao Qi areas C Entrance top is provided with double-current spray gun body 6, and the primary gas-liquid separation is big with airflow area of section in aerosol preregulator area C In the airflow area of section of spraying spraying layer 8.

Used as the further improvement of above-mentioned technical proposal, the nozzle of other spraying spraying layers 8 is bi-directionally or uni-directionally to spray Mouth can be single unidirectional or two-way water smoke hollow cone nozzle or single unidirectional or two-way water smoke solid nozzle, and nozzle is along spraying The upper and lower arranged for interval in the center of spray scrubber I, the bi-directionally or uni-directionally nozzle of other spraying spraying layers 8 can be several lists To or two-way hydraulic spray nozzle, the nozzle plane projection of adjacent spraying spraying layer 8 is staggered in alternate.

Used as the further improvement of above-mentioned technical proposal, the venturi sprays intercept layer 5 by more than two-layer or two-layer non- Uiform section Venturi rod gate layer is constituted, and the non-constant section Venturi rod gate layer is existed by some solid poles or some hollow circular-tubes Equidistant on same plane to rearrange, the rod grid section cloth column direction of adjacent non-constant section Venturi rod gate layer is identical and in phase Between be staggered, the rod grid cross sectional shape of every layer of non-constant section Venturi rod gate layer is identical and cloth column direction is identical, most one layer of bottom Non-constant section Venturi rod gate layer rod grid area of section be less than its adjacent last layer rod grid area of section.

Used as the further improvement of above-mentioned technical proposal, the lower end of the spraying spray scrubber I is provided with spraying spray and washes Tower dirt collecting bucket 10 is washed, the lower end of the spraying spray scrubber dirt collecting bucket 10 is connected with the primary ash of shallow-layer formula by blow-off line 11 Mud settling vessel, the shallow-layer formula primary plaster settling vessel includes inversed taper platform build muddy water shallow layer tank 12, Shaftless screw conveyor 13 Pipeline 14 is cut out with dirt mud, the lower end of inversed taper platform build muddy water shallow layer tank 12 connects with the input of Shaftless screw conveyor 13 Connect, the upper end that the dirt mud cuts out pipeline 14 is connected with the output end of Shaftless screw conveyor 13, the frustum build muddy water is shallow The side in layer pond 12 is provided with the spraying spray scrubber muddy water floss hole 15 after just separating.

Used as the further improvement of above-mentioned technical proposal, the downstriker gas-liquid foam suspension air swirl dehydrating tower II is wrapped Include descending washing separator 16 and the inward turning flue 17 of the reverse spray type foam suspension being sequentially connected from top to bottom, the reverse spray type foam The smoke inlet end of the descending washing separator 16 of suspension is connected flue 1 and connects with increasing mist formula, and the reverse spray type foam suspension is descending If being sequentially provided with the export-oriented spiral board 19 of water smoke suspension foam maker 18, dried layer and eddy flow from top to bottom in washing separator 16 Dewatering cavity 20, the water smoke suspension foam maker 18 is made up of one group of water fog spraying gun and hydraulic spray nozzle, hydraulic spray nozzle injection side To being inverse cigarette airflow direction, hydraulic spray nozzle washing separator 16 entrance section distance descending with reverse spray type foam suspension is more than 1.3 Rice, the lower end of eddy flow dewatering cavity 20 is provided with blowdown inclined clapboard 21, the upper end of inward turning flue 17 through blowdown inclined clapboard 21 and The plate face of blowdown inclined clapboard 21 is higher by, the outer wall of eddy flow dewatering cavity 20 above the lower end of blowdown inclined clapboard 21 is provided with muddy water floss hole 22, the water fog generator 23 in eddy flow dewatering cavity 20 is provided with directly over the inward turning flue 17, the inward turning flue 17 Lower end is provided with dehydrator dirt collecting bucket 24, and the lower end of dehydrator dirt collecting bucket 24 is provided with dehydrator muddy water floss hole 25.

As the further improvement of above-mentioned technical proposal, blower fan power station 26, the wind are installed on the connection flue 2 Mechanomotive force station 26 includes blower fan, motor and control system, and the upstriker wet electrostatic deep purifier III includes upper chamber 27 With lower chamber 28, corona electrode system 29 and precipitation electrodes system 30 are provided between the upper chamber 27 and lower chamber 28, it is described Upper chamber 27 and lower chamber 28 are horn mouth formula and both horn mouths are relative, and the lower chamber is provided with reverse V-shaped in 28 times parts Air distributor 31, if the top of the lower chamber 28 is arranged with dried layer flue gas even distribution device 32, the upper chamber 27 is provided with cigarette Gas exports constant-current stabilizer 33, and the lower section of the exhanst gas outlet constant-current stabilizer 33 is provided with the flusher 34 in upper chamber 27, institute State upper chamber 27 and be externally provided with some electric insulation casees 35, the electric insulation case 35 uses electrical heating inside holding form, temperature control to exist 100-120 DEG C, the lower end of the lower chamber 28 is connected with wet electrostatic deep purifier smoke inlet 36, the wet electrostatic depth The lower end of clarifier smoke inlet 36 is provided with sewage draining exit 37, the connection flue 2 and wet electrostatic deep purifier smoke inlet 36 side wall is tangentially connected.

Used as the further improvement of above-mentioned technical proposal, the reverse V-shaped air distributor 31 includes support frame 38 and installs In the blast cap of the upper end of support frame 38, the blast cap includes inverted cone 39 and some are connected with the base of inverted cone 39 and uniformly divide The blade 40 of cloth, the flue gas even distribution device 32 includes some beading rods being evenly distributed in same level, the string Some spherical surface bodies are serially connected with extension bar, the spherical surface body is nonmetallic solid or hollow spheric body, and the beading rod is metal The rod member of the outer preservative treatment of the solid or hollow rod or metal material of material, the exhanst gas outlet constant-current stabilizer 33 is a surface Round-meshed plate face is uniformly opened, the plate face is metal or non-metal anti-corrosion material, and the flusher 34 includes some sprays Head, some shower nozzle gap injections, the corona electrode system 29 is made up of some titanium alloy cathode lines, the precipitation electrodes System 30 is made up of some boundling honeycomb ducts.

Used as the further improvement of above-mentioned technical proposal, the both up and down of the flue gas even distribution device 32 is provided with some uniform points The water smoke or air water mist generation device 41 of cloth.

Used as the further improvement of above-mentioned technical proposal, the smoke-intake pipe road 3 is horizontal by 12-16 °, smoke-intake pipe road 3 Way in down.

Embodiment 1

Under the negative-pressure ward of blower fan, from Slag treatment device draw dust-laden steam stream flue gas, from smoke-intake pipe road horizontal by Oblique spraying spray scrubber under 14 ° of angles, first with spray under let out cleaning solution counter current contacting washing, cooling.

The up certain distance of flue gas, on smoke inlet cross section to appropriate section between non-constant section Venturi rod gate layer In inverse air-flow, double-current spray gun body a group by a group or one group thin liquid mist spray gun or one group of double-current spray gun body and thin liquid mist spray gun group are set Close, the droplet group of liquid or the droplet group of absorbent are uniformly sprayed to the section, flue gas is mixed with, and the region is obtained greatly The droplet group of amount and the droplet group close compared with fine dust particles size or absorbent, and form mist field density higher, thus, shape Include the function of the droplet group of fine particle and respirable dust as core with suspended particulate into dynamic effectively cohesion, interception.It is double , it is necessary to control operation condition when Fluid sprayer or thin liquid mist spray gun normal work, while supplying the compressed gas of certain pressure（Air Or nitrogen, steam）With the water (or absorbing liquid) of certain pressure.The aero operating pressure at nozzle entrance is under normal circumstances The operating pressure of 0.35-0.5 Mpa, water or absorbent is 0.35-0.8 Mpa.The nozzle of double-current spray gun body or thin liquid mist spray gun The solution of inside, compressed gas and water or absorbent produces very tiny particle by strike several times.Nozzle normal work When, lance outlet liquid mist stream flow velocity reaches 25m/s-37m/s, cleaning solution counter current contacting washing that flue gas is let out under spray first, Cooling, after wet down, carry the mixed flue gas of a large amount of spray particles groups for increasing injection newly from double-current spray gun body or thin liquid mist spray gun to The upper non-constant section Venturi rod gate layer by setting, because venturi sprays intercept layer flue gas constriction in flow area, flue gas exists Accelerate to pass through between two layers of space of non-constant section Venturi rod grid in non-constant section Venturi rod gate layer, spray in tower and under Cleaning solution forms the suspension changing of the relative positions, the contact of gas-liquid turbulent flow, flow of flue gas energy with the dust-laden mixed flue gas of upstream carrying aerosol Increase turbulent flow contact between gas, solid, liquid three-phase, fierce inertial collision, cohesion occur and intercepts, substantially increase air-liquid Mass transfer, heating surface between two-phase, circulating face account for basal area 30--65%.The non-constant section Venturi rod gate layer it is non-etc. Section Venturi rod grid cross sectional shape, cloth column direction are identical；Most one layer of the bottom Venturi rod section of non-constant section Venturi rod grid Last layer Venturi rod section adjacent less than its so that mixing wastewater with air flue gas from larger cross-section Venturi rod downside it is tangential import compared with Space between the Venturi rod of heavy in section, when mixing wastewater with air flue gas pass through larger cross-section Venturi rod grid between space accelerate when, So as to the bubbling for forming stronger " surrounding gas with liquid " sprays state, gas-liquid turbulent flow contact strength is greatly increased, improved Cleaning system is to the capture rate of fine grit and the mass transfer aggregation efficiency of gas purification.

Dust-laden steam stream flue gas is upwardly into spraying spray washing area B, spraying spray by non-constant section Venturi rod gate layer If drench that individual layer or dried layer spraying spraying layer are provided with scrubbing section B from bottom to top.

The spraying spraying layer is made up of spray gun and nozzle, and the nozzle of the spraying spraying layer of top is unidirectional nozzle, side To downward, the nozzle of other spraying layers is bi-directionally or uni-directionally nozzle.

The spraying spraying layer spray tip Boulez form includes two kinds of forms:Can be that its is every for some spraying spraying layers , for single unidirectional or two-way water smoke hollow cone spray tip or single, double to water smoke solid nozzle, its spray tip is along tower center for layer Spaced certain distance is arranged up and down；Can also be that its every layer of some spraying spraying layers spray unidirectional or two-way water smoke by some Rifle nozzle is constituted, and the nozzle plane projection of adjacent spraying spraying layer is in alternate staggeredly Boulez, non-overlapping copies；

This example spraying spraying layer is four layers, its every layer for it is single unidirectional or two-way water smoke hollow cone spray tip or it is single, double to Water smoke solid nozzle, its spray tip along tower center, arrange up and down by spaced certain distance；All spray guns are provided with base peace Loaded on outer tower wall, operating personnel can implement integral replacing dismounting outside tower to spray gun.

Spraying spray liquid uses unit style applicator designs, spraying spraying layer spray washing liquid and process water to be respectively adopted electro-hydraulic Dynamic valve group independent control, to select economic operation model, flushing process is automatically performed by programme-control.

Dust-laden steam stream flue gas through spraying spray high-effective dust-removing it is net after it is up by primary gas-liquid separation and aerosol preregulator Area C, because the primary gas-water separation and aerosol preregulator flue gas flow cross-section areas are more than the spraying spraying layer flue gas stream Logical section, carries big in primary gas-liquid separation and the aerosol preregulator area upward certain distance space of C entrances, in dust-laden vapor stream What amount can not be settled in spraying spray scrubber includes the droplet of fine particle and respirable dust as core with suspended particulate Group's particle deceleration is detained, flocking settling.

The flue gas of removing dust purification is fitted in smoke inlet space upwards in the primary gas-liquid separation with aerosol preregulator area C When on section, double-current spray gun body or thin liquid mist spray gun are set；Droplet group or the absorbent of liquid are uniformly sprayed to the section Droplet group, the region has been regained droplet group or the mist of absorbent of a large amount of and close compared with fine dust particles size water Drop group, and form mist field density higher；Through spray spraying layer and subsequent droplet group particle deceleration, cohesion, sedimentation, increase mist again Flue gas is mixed Deng the dust-laden steam flowing water after udst separation, is imported under blower negative pressure effect and is increased mist formula connection flue；Dust-laden steams Steam flow flue gas enters downstriker gas-liquid foam suspension air swirl dehydrating tower entrance after mixing cohesion in increasing mist formula connection flue The i.e. described descending washing separator inlet of reverse spray type foam suspension.

Dust-laden vapor stream flue gas is into being provided with reverse spray type bubble in the downstriker gas-liquid foam suspension air swirl dehydrating tower The descending washing separator of foam suspension.

The dust-laden vapor stream dust-laden steam stream flue gas with water smoke field density higher is carried again enters the reverse spray type In the descending washing separator of foam suspension, the generation of water smoke suspension foam is provided with the descending washing separator of reverse spray type foam suspension If the export-oriented spiral board of device, dried layer；Water smoke suspension foam maker is made up of one group of atomized water spray nozzle and spray gun, atomized water spray Direction is inverse cigarette airflow direction；Atomized water spray nozzle washing separator inlet cross-sectional distance descending with reverse spray type foam suspension is more than 1.3 meters；Cleaning solution is inversely sprayed into air-flow from bottom to top by the upward nozzle of water smoke suspension foam column spout, gas-liquid two Mutually contacted in high speed anti-phase turbulent flow, it passes the gas through a liquid film foam area for strong turbulence, the liquid table in froth zone Area is big and updates rapidly, enhances gas-liquid heat-transfer, mass transport process, carries out efficient cleaning dust purification again to flue gas And wet down.For higher emissions requirement, the requirement of water smoke suspended lance water source is corresponding to improve.In the descending washing of reverse spray type foam suspension Water smoke suspension foam maker bottom appropriate location is provided with one layer with the descending washing separator of reverse spray type foam suspension in separator The prismatic export-oriented spiral board of entrance, makes the gas-liquid two-phase of high turbulence form pneumatic rotation again by export-oriented spiral board Stream, exhanst gas outlet enters the eddy flow dewatering cavity that cross section expands, gas-liquid centrifugation；Isolated in the eddy flow dewatering cavity Sewage in blowdown inclined clapboard, collect through outside muddy water floss hole arrange, flue gas through reverse spray type foam suspension it is descending washing separator enter After the row cleaning dust purification more stronger than abovementioned steps, under system negative pressure or positive pressure, draw precession through air swirl and enter Inward turning flue, to adapt to the smoke dust discharge concentration of high requirement, water fog generator, air water spray is provided with the inward turning flue entrance Rifle group feed flow air feed interface and gas spray gun group feed flow air feed interface, in the inward turning flue, make again flue gas and water smoke eddy flow, Condense, let out under the wall that becomes, inward turning flue lower bottom part is dehydrator dirt collecting bucket, dehydrator muddy water floss hole, muddy water is collected outer to mud Water discharges liquid packing 42, reuse after being processed into circular water treating system.

And the air water mist that the water fog generator nozzle of the inward turning flue entrance top favorable current setting is imported is carried, in institute State in inward turning flue, flue gas and water smoke eddy flow are made again, mixed, condensed, bulky grain water smoke is downward in the inward turning flue outlet Gravitational settling in space, falls into the dehydrator dirt collecting bucket, collects, and is arranged from the dehydrator muddy water floss hole of dehydrator dirt collecting bucket Enter muddy water discharge liquid packing 42, the descending washing separator separating liquid of reverse spray type foam suspension is taken off by the blowdown inclined clapboard with eddy flow The space that water cavity is surrounded is collected by muddy water floss hole and enters muddy water discharge liquid packing 42.

Coupled with the blower fan power station import by connecting flue in inward turning flue bottom；The outlet of blower fan power station passes through Connection flue couples with upstriker wet electrostatic deep purifier, and the blower fan power station includes blower fan and motor, control system.

Through above-mentioned steps step by step, crescendo, the dust-laden vapor stream flue gas of multistage dedusting dehydrating demisting enter into wet electrostatic depth Degree clarifier smoke inlet in, Minus speed current stabilization it is up, then through the reverse V-shaped air distributor blade by flue gas segmentation and diversion, And the outer rim diffusion in the lower chamber back taper bucket shape space of wet electrostatic deep purifier, it is uniform rise, again through lower chamber section The flue gas even distribution device of upper setting forces air flow guiding distribution, and its flue gas even distribution device is made up of some sphericals and beading rod, The air-flow of turnover electric field is formed uniform speed airflow, reduce rocking for cathod system, improve the demisting efficiency of electrostatic precipitator. Spray-type humidifier is provided between wet electrostatic deep purifier lower chamber inlet horn and anode tube bank, before making to enter electric field Dust-laden vapor stream flue gas enter-walk humidification, coalescence, while making the spherical of flue gas even distribution device and beading rod surface form wet The liquid film layer of profit, is allowed to be difficult dust fouling, and flue gas dissipates when upper in the space that spherical group is formed along the rotation of spheroid face Uniformly, its flue gas even distribution superior performance, flow resistance is low, also enables that flue gas even distribution device clears up replacing and works convenient simple, Spherical is serially connected on beading rod, and its gap is adjustable, spherical quantity can increased or decreased, be easy to determine perforate by simulated test Rate, the cold conditions airflow uniform distribution Adjustment Tests that carry out increase and decrease quantity and the change of spherical quantity baffle after being easy to be completed Distribution of the spacing optimization airflow in electric field, makes deduster be operated in a state for being conducive to dedusting.Spherical is adopted in this example It is serially connected on metal rod with the corrosion-resistant high pressure resistant synthetic resin ball plastics ball of high-strength high temperature-resistant.Adding after being flowed through water conservancy diversion The flue gas of wet saturation enters the electric field region of wet electrostatic deep purifier, using in high-pressure pulse direct current, electric field driven flue gas Fine flue dust, makes its Accelerated subsidence in anode surface, right so as to reach to remove the grit in flue gas, droplet and aerosol etc. The purification of flue gas.By 0 ~ 80 kilovolt（It is adjustable）High-pressure pulse direct current source electricity introducer in, make to be suspended in device corona electricity Electrode systems constantly launch electronics, and portion gas between electrode are ionized into the particles such as negative ions, dirt encounters ion and charged, presses Repel each other according to the same sex, the principle that there is a natural attraction between the sexes, it is charged after grit each moved to the opposite direction of electric polarity, cation is to corona Electrode system is moved, and electronics and anion then shift to precipitation electrodes system.The dirt and electronegative ion phase being dispersed in gas Collision and it is charged, in the presence of electric field, powered dirt particle is shifted on precipitation electrodes system inwall, by deadweight along wall and under, fall Enter in the dust arrester installation below electric cleaner and mix with slurries, while most of aerosol in removing flue gas, makes discharge flue gas It is purified.This example corona electrode system is by the efficient cathode line of some titanium alloys（Corona electrode）Composition, every cathode line is used Heavy-hammer tension, and be provided with and fill anti-sway framework；Precipitation electrodes system is combined and integrated with upper lower face plate by some boundling honeycomb ducts.

Flue gas after purification, through exhanst gas outlet constant-current stabilizer current stabilization, makes electric field in wet electrostatic deep purifier upper chamber The clean flue gas in region are arranged even into outside aiutage, and exhanst gas outlet constant-current stabilizer is used and uniformly opens round-meshed plate face, plate face It is metal material；Exhanst gas outlet constant-current stabilizer is arranged below-group flusher, the flusher includes that anode tube rinses layer Layer is rinsed with cathode line, located at the electric field region top that anode tube and cathode line are constituted；Spray regime is：Using several shower nozzles, Interruption injection；The electric insulation and heating system：One layer of multigroup insulated case is set, using electrical heating inside holding pattern, temperature control 110 ± 10 DEG C of system.It is arranged at upstriker wet electrostatic deep purifier outside and higher than the electric field region.

Spraying spray scrubber washing sewer is collected through spray scrubber dirt collecting bucket of spraying, and institute is entered by blow-off line Shallow-layer formula primary plaster settling vessel is stated, the shallow-layer formula primary plaster settling vessel is by Shaftless screw conveyor（Or other sludge are defeated Go out machine）, dirt mud cut out pipeline, spraying spray scrubber muddy water floss hole composition；The Shaftless screw conveyor refers to and level Face is in the shaftless single or double conveying worm of a constant inclination Dou angles, by drive device, U-type groove, liner plate, upper lid, inversed taper platform build The parts such as muddy water shallow layer tank are constituted, and the inversed taper platform build muddy water shallow layer tank upper inlet connects with blow-off line, and side is provided with just Spraying spray scrubber muddy water floss hole after separation, outer spoil disposal water is entered by spray scrubber muddy water floss hole of spraying first Shallow-layer formula primary plaster settling vessel, by inversed taper platform build muddy water shallow layer tank, using shallow pool principle, realizes that solid-liquid is efficiently separated, The deceleration of suspension bulky grain is settled into the underflow of concentration in muddy water, is collected by the shaftless single or double helical feed machine inlet, And gradually elapsed through Shaftless spiral blade along the shaftless single or double conveying worm horizontal by a constant inclination Dou angles and squeeze filter Pipeline discharge is cut out to dirt mud, the dirt mud that usual moisture content is about 65% ~ 75% is obtained herein, through the waste water after primary mud-water separation The spraying spray scrubber muddy water floss hole being provided with the inversed taper platform build muddy water shallow layer tank side enters circulating water treatment system System, further completes cooling, clarification in pond is precipitated, and supernatant is made into circulatory pool by the circulation of circulating pump feed system equipment With.

The downstriker gas-liquid foam suspension air swirl dehydrating tower is with wet electrostatic device for deep cleaning sewage through muddy water Discharge liquid packing 42 enters circular water treating system circulatory pool and is recycled by circulating pump supply arrangement.

Dedusting plaster is concentrated in effluent cycle sedimentation basin, by slurry submerged pump timing extraction, is delivered at drying bed Reason.

Embodiment 2

Iron and steel corporation Slag treatment comprehensive reformation project, using drum process slag handling process, from containing that Slag treatment device is drawn Dirt steam stream humidity of flue gas is high：13%--15%, the dust carried under one's arms is the superfine powder of slag, with the hydraulicity and glutinous（Knot） Property.From in terms of dust-laden particle diameter distribution：Shared percentage by volume/%：10 μm of particle diameter ＞ accounts for 56%, 2--10 μm of particle diameter account for 32% remaining 2 μm of ＜ accounts for 12%.From slag processing dust-laden steam stream flue gas wet spray spraying dedusting device.

Wet-type spray cleaner, before air-introduced machine, gas is emitted into air through blower fan, aiutage after purification.

The relevant operational factor of the present embodiment is as follows

Treatment exhaust gas volumn 15 × 10⁴m³/h

80 ~ 100 DEG C of input gas temperature

Dust inlet initial concentration 1000mg/Nm³

Flue gas is passed through（Steel）Metallurgical slag processing procedure flue gas wet type unsteady flow dedusting and wet electrostatic device for deep cleaning system：Spraying Spray scrubber void tower velocity of flue gas 4.5-6 (m/s)；Water smoke suspends in downstriker gas-liquid foam suspension air swirl dehydrating tower II Two groups of foam column；Two groups of double-current spray gun body；One group of spraying some groups of spray gun of spray of thin liquid mist spray gun；Shallow-layer formula primary plaster Settling vessel cuts out moisture content and is about 72% dirt mud amount 2.4t/d and can directly transport outward from shaftless single step helical conveyer.At recirculated water 1/3, the comprehensive water treatment system operating cost that reason system footprint area reduces reduces 40%, and sludge volume reduces by more than 40%, dirt mud Processing cost reduces 30%, while mitigating significantly because of the mill that high suspended matter mass concentration muddy water brings into recirculated water pipe network system The phenomenons such as damage, fouling, burn into blocking.Wet type unsteady flow dust pelletizing system section port dust contained flue gas concentration≤30mg/Nm³, wet type is quiet Electric advanced purification system exiting flue gas dust content≤10mg/Nm^3,, i.e., apparatus of the present invention and system exhaust cylinder exhanst gas outlet dust-laden Concentration≤10mg/Nm³, efficiency of dust collection reaches 99%, and Pa≤1700Pa, 54 DEG C of exit gas temperature are damaged in dedusting and purifying device resistance. 22% is reduced compared to usual Wet-type spray scrubbing tower cleaning system liquid-gas ratio.Because processing unit is that integrated level is high, compact in design, Dedusting and purifying device includes floor space only 150m including blower fan power station, aiutage etc.²Square metre.Air quantity is processed in identical Under the conditions of, capital expenditure expense, equipment investment expense and operating cost are below oneself technology, and liquid-gas ratio can subtract under equal conditions Few 33%, the special emission limit requirement of the atmosphere pollution new better than country.It is wet purification technology of new generation and device.Extensively It is applied to that the high temperature of the industries such as steel, non-ferrous metal, cement building material, electric power, chemical industry, high humidity, viscosity be big and powder containing high specific resistance The flue gas wet down udst separation of dirt；Suitable for flue gas desulfurization and dedusting and gas purification, it is also possible to which the purification for flue gas coal gas is cold But system.

Claims (10)

1. metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system, it is characterised in that sprayed including spraying Drench scrubbing tower, downstriker gas-liquid foam suspension air swirl dehydrating tower and upstriker wet electrostatic deep purifier, the spraying Spray scrubber upper end outlet is connected cigarette with end entrance on downstriker gas-liquid foam suspension air swirl dehydrating tower by increasing mist formula Road is connected, and the downstriker gas-liquid foam suspension air swirl dehydrating tower lower end exports and upstriker wet electrostatic deep purifier Lower inlet by connect flue connect, it is described spraying spray scrubber be the wet type multilayer gas-liquid counter current way of contact, it is described under Line gas-liquid foam suspension air swirl dehydrating tower is gas-liquid co-current contact mode, and spraying spray scrubber bottom side of the wall is provided with Smoke-intake pipe road, the upper end of upstriker wet electrostatic deep purifier is provided with aiutage.

2. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 1 and wet electrostatic advanced purification system, its Be characterised by, in the spraying spray scrubber smoke-intake pipe road enter tower mouthful top be sequentially provided with from bottom to top the solidifying trapping area of mist, Spraying spray washing area and primary gas-liquid separation and aerosol preregulator area, between the solidifying trapping area of the mist and spraying spray washing area Venturi injection intercept layer is provided with, one group of double-current spray gun body or one group thin liquid mist spray gun or one group are provided with the solidifying trapping area of the mist Double-current spray gun body is combined with thin liquid mist spray gun, if dried layer spraying spraying layer is provided with the spraying spray washing area from bottom to top, The spraying spraying layer is made up of spray gun and nozzle, and the nozzle of the spraying spraying layer of top is unidirectional nozzle, and direction is downward, its His the spray nozzle of spraying layer is bi-directionally or uni-directionally nozzle, and primary gas is provided with the primary gas-liquid separation and aerosol preregulator area Liquid is separated and is provided with two-fluid spray with the smoke inlet top in aerosol preregulator area with aerosol preregulator, the primary gas-liquid separation Airflow of the airflow area of section more than spraying spraying layer in rifle, the primary gas-liquid separation and aerosol preregulator area Area of section.

3. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 2 and wet electrostatic advanced purification system, its It is characterised by, the nozzle of other spraying spraying layers is for bi-directionally or uni-directionally nozzle can be hollow for single unidirectional or two-way water smoke Cone nozzle or single unidirectional or two-way water smoke solid nozzle, nozzle is along the spraying upper and lower arranged for interval in spray scrubber center, institute The bi-directionally or uni-directionally nozzle for stating other spraying spraying layers can be several unidirectional or two-way hydraulic spray nozzles, adjacent spraying spraying layer Nozzle plane projection be staggered in alternate.

4. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 2 and wet electrostatic advanced purification system, its It is characterised by, the venturi injection intercept layer is made up of two-layer or two-layer above non-constant section Venturi rod gate layer, described non- Uiform section Venturi rod gate layer is spaced substantially equidistant is constituted at grade by some solid poles or some hollow circular-tubes, adjacent The rod grid section cloth column direction of non-constant section Venturi rod gate layer is identical and is staggered in alternate, every layer of non-constant section venturi The rod grid cross sectional shape of rod gate layer is identical and cloth column direction is identical, and the rod grid of the non-constant section Venturi rod gate layer at most one layer of bottom cut Face area is less than its adjacent last layer rod grid area of section.

5. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 1 and wet electrostatic advanced purification system, its It is characterised by, the lower end of the spraying spray scrubber is provided with spraying spray scrubber dirt collecting bucket, the spraying spray scrubber The lower end of dirt collecting bucket is connected with shallow-layer formula primary plaster settling vessel, the shallow-layer formula primary plaster settling vessel bag by blow-off line Include inversed taper platform build muddy water shallow layer tank, Shaftless screw conveyor and dirt mud and cut out pipeline, the inversed taper platform build muddy water shallow layer tank Lower end is connected with the input of Shaftless screw conveyor, and the dirt mud cuts out the upper end of pipeline and the output of Shaftless screw conveyor End connection, the side of the frustum build muddy water shallow layer tank is provided with the spraying spray scrubber muddy water floss hole after just separating.

6. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 1 and wet electrostatic advanced purification system, its It is characterised by, the downstriker gas-liquid foam suspension air swirl dehydrating tower includes the reverse spray type foam being sequentially connected from top to bottom Descending washing separator and the inward turning flue of suspension, the smoke inlet end of the descending washing separator of reverse spray type foam suspension and increasing The connection flue connection of mist formula, water smoke suspension bubble is sequentially provided with the descending washing separator of reverse spray type foam suspension from top to bottom If the export-oriented spiral board of foam generator, dried layer and eddy flow dewatering cavity, the water smoke suspension foam maker is by one group of water fog spraying gun With hydraulic spray nozzle composition, hydraulic spray nozzle injection direction is inverse cigarette airflow direction, and hydraulic spray nozzle is descending with reverse spray type foam suspension to be washed Separator inlet cross-sectional distance is washed more than 1.3 meters, the eddy flow dewatering cavity lower end is provided with blowdown inclined clapboard, on the inward turning flue End is through blowdown inclined clapboard and is higher by blowdown inclined clapboard plate face, and the eddy flow dehydration cavity outer wall above blowdown inclined clapboard lower end is provided with Muddy water floss hole, the water fog generator in eddy flow dewatering cavity is provided with directly over the inward turning flue, the inward turning flue Lower end is provided with dehydrator dirt collecting bucket, and the dehydrator dirt collecting bucket lower end is provided with dehydrator muddy water floss hole.

7. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 1 and wet electrostatic advanced purification system, its It is characterised by, blower fan power station is provided with the connection flue, and the blower fan power station includes blower fan, motor and control system System, the upstriker wet electrostatic deep purifier includes upper chamber and lower chamber, is provided between the upper chamber and lower chamber Corona electrode system and precipitation electrodes system, the upper chamber and lower chamber are horn mouth formula and both horn mouths are relative, institute State and be provided with reverse V-shaped air distributor in part under lower chamber, if the lower chamber top is arranged with dried layer flue gas even distribution device, institute State and be provided with upper chamber exhanst gas outlet constant-current stabilizer, the exhanst gas outlet constant-current stabilizer lower section is provided with the flushing in upper chamber Device, the upper chamber is externally provided with some electric insulation casees, and the electric insulation case uses electrical heating inside holding form, temperature control to exist 100-120 DEG C, the lower chamber lower end is connected with wet electrostatic deep purifier smoke inlet, the wet electrostatic deep purifying The lower end of device smoke inlet is provided with sewage draining exit, and the connection flue is tangential with the side wall of wet electrostatic deep purifier smoke inlet Connection.

8. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 7 and wet electrostatic advanced purification system, its It is characterised by, the reverse V-shaped air distributor includes support frame and the blast cap installed in support frame upper end, the blast cap includes falling Cone and it is some be connected with inverted cone base and equally distributed blade, the flue gas even distribution device include some it is uniform The beading rod in same level is distributed in, some spherical surface bodies are serially connected with the beading rod, the spherical surface body is nonmetallic Solid or hollow spheric body, the beading rod is the bar of the outer preservative treatment of the solid or hollow rod or metal material of metal material Part, the exhanst gas outlet constant-current stabilizer uniformly opens round-meshed plate face for a surface, and the plate face is metal or nonmetallic corrosion resistant Corrosion material, the flusher includes some shower nozzles, and some shower nozzle gaps are sprayed, and the corona electrode system is by some titaniums Alloy cathode line is constituted, and the precipitation electrodes system is made up of some boundling honeycomb ducts.

9. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 7 and wet electrostatic advanced purification system, its It is characterised by, the flue gas even distribution device both up and down is provided with some equally distributed water smokes or air water mist generation device.

10. metallurgical Slag treatment flue gas wet type unsteady flow dedusting according to claim 1 and wet electrostatic advanced purification system, its It is characterised by, horizontal by 12-16 °, the Way in smoke-intake pipe road is down in the smoke-intake pipe road.