CN206454435U - Metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system - Google Patents

Abstract

The utility model is related 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, spray scrubber bottom side of the wall of spraying is provided with smoke-intake pipe road, the upper end of upstriker wet electrostatic deep purifier is provided with aiutage.The utility model effectively improves clearance of the purifier to fine particle, it is stably reached ultralow smoke dust discharge concentration 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

The utility model is related to metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic advanced purification system, for big Gas prevention and cure of pollution, belong 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 typical occurring source of dust-laden steam stream flue gas.High-temperature slag is produced when by quick water quenching during Slag treatment Substantial amounts of superheated steam, it is inevitable that steam carries under one's arms the diffusion of slag micronic dust.Its main component is metal oxide particle, water steaming Gas, is polluted to regional environment.With≤steel industry atmosphere pollutants emission standardses >=implementation, particularly key area Prevention and control of air pollution action plan implement, the special emission limit of atmosphere pollution requires 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, 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, and property is coagulated with the hydraulicity and 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 wet electrical dust precipitator, easily fouling and be difficult to clear up on the internals such as electrode, plate.

Wet dust removal scheme is used for high temperature, high humidity and the gas cleaning dedusting that property is coagulated with the hydraulicity and glue (knot), technique Simply, investment and operating cost are low, easily implement, 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 is to pellet and the relatively low another aspects of aerosol clearance, 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 Greatly, desilting, the operating cost such as to transport, handle high；Particularly high concentration suspension easily blocks runner.

The Wet-type spray scrubbing tower of new generation processing dust-laden steam stream flue gas generally improved is often thin to improve system trapping The ability of particulate matter, reaches higher dust separation efficiency and uses big liquid-gas ratio overwass, 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..

Utility model content

For drawbacks described above, the purpose of this utility model is to provide a kind of adaptation high temperature, high humidity, high viscosity characteristic flue gas Dust separation, especially adapt to the steam stream flue-gas dust removal and purification that slag processing process is produced, pass through high-efficient wet-type unsteady flow dedusting Purification effectively solves influence of the high fouling to purifier and system dust removing component, then concatenates wet electrostatic advanced purification system, Clearance of the purifier to fine particle is effectively improved, it is stably reached ultralow soot emissions under the conditions of low energy consumption Concentration, meets metallurgical Slag treatment flue gas wet type unsteady flow dedusting and wet electrostatic that stricter environmental pollution administers emission request Advanced purification system.

The technical scheme used for this utility model is：

It is deep including spraying spray scrubber, downstriker gas-liquid foam suspension air swirl dehydrating tower and upstriker wet electrostatic Spend clarifier, the spraying spray scrubber upper end outlet and end entrance on downstriker gas-liquid foam suspension air swirl dehydrating tower Flue connection is connected by increasing mist formula, the downstriker gas-liquid foam suspension air swirl dehydrating tower lower end outlet is wet with upstriker Formula electrostatic deep purifier lower inlet is connected by connecting flue, and the spraying spray scrubber is wet type multilayer gas-liquid counter current The way of contact, the downstriker gas-liquid foam suspension air swirl dehydrating tower is gas-liquid co-current contact mode, spray washing of spraying Tower bottom side of the wall is provided with smoke-intake pipe road, and the upper end of upstriker wet electrostatic deep purifier is provided with aiutage.

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 Sprayed between solidifying trapping area and spraying spray washing area provided with venturi in intercept layer, the solidifying trapping area of the mist provided with one group of double fluid 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 lower provided with dried layer spraying spraying layer, 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 being provided with primary gas-liquid separation and aerosol preregulator, the primary gas-liquid separation and aerosol preregulator area in aerosol preregulator area Smoke inlet above provided with double-current spray gun body, the primary gas-liquid separation and the airflow section face in aerosol preregulator area Product is more than the airflow area of section of spraying spraying layer.

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 arranged for interval above and below scrubbing tower center, the bi-directionally or uni-directionally nozzles of other spraying spraying layers can it is unidirectional for several or Two-way hydraulic spray nozzle, the nozzle plane projection of adjacent spraying spraying layer is staggered in alternate.

As the further improvement of above-mentioned technical proposal, the venturi injection intercept layer is non-etc. by two layers or more than two layers 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.

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 the primary plaster of shallow-layer formula by blow-off line and precipitated Device, the primary plaster settling vessel of the shallow-layer formula is cut out including inversed taper platform build muddy water shallow layer tank, Shaftless screw conveyor and dirt mud The input connection of pipeline, the inversed taper platform build muddy water shallow layer tank lower end and Shaftless screw conveyor, the dirt mud cuts out pipe The upper end in road and the output end of Shaftless screw conveyor are connected, after the side of the frustum build muddy water shallow layer tank is provided with just separation Spraying spray scrubber muddy water floss hole.

As the further improvement of above-mentioned technical proposal, the downstriker gas-liquid foam suspension air swirl dehydrating tower includes Under the descending washing separator of reverse spray type foam suspension and inward turning flue being sequentially connected from top to bottom, 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 increasing mist formula 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 is more than 1.3 meters, the eddy flow dewatering cavity lower end with the descending washing separator inlet cross-sectional distance of reverse spray type foam suspension Provided with blowdown inclined clapboard, 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, which is provided with to be provided with directly over muddy water floss hole, the inward turning flue, is located at eddy flow dewatering cavity 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, is provided with part on reverse V-shaped air distributor, the lower chamber in part under the lower chamber If 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 being located 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, temperature control is at 100-120 DEG C, and the lower chamber lower end is connected with wet electrostatic deep purifier cigarette 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.

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 is that round-meshed plate is uniformly opened on 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.

As the further improvement of above-mentioned technical proposal, the flue gas even distribution device both up and down is uniformly distributed provided with some 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.

The utility model has the advantages that：

（1）Dust separation efficiency high of the utility model to flue gas.It is small in the dust-laden steam stream flue gas that slag processing is produced Percentage by volume about 32-44% is accounted in 10 μm of dust sizes.Even if the Wet-type spray purifying column of usual optimization design is used for cigarette Gas purifying and dedusting, due to using common wet dust removal structure, it is only for the classification efficiency of 0--5 μm of fine particle to particle diameter 60%-72%, the total dedusting of dust-laden steam stream flue gas that the slag processing higher to percentage by volume shared by suction particulate matter is produced is imitated Rate is less than 90%.The special emission limit requirement of atmosphere pollution can not be stably reached, stricter emission request is reached, carry High its is the classification efficiency less than 10um particulate matters to particle diameter as key problem in technology.The utility model flue gas wet dust removal purifies skill Art be respectively adopted the solidifying trapping of mist, the speed-raising injection of non-constant section Venturi rod grid combination layer formed froth bed, spraying spray washing and Primary gas-liquid separation and aerosol are presetting, then the descending washing separator of the reverse spray type foam suspension through water smoke suspension foam column, The solid particles thing concentration that can form fouling in exhanst gas outlet dust concentration≤30mg/Nm3, flue gas is set to drop bottom to extremely low fouling wind Wet static dedusting unit, multistage demisting unit are concatenated after dangerous scope again, step by step, crescendo, the cleaning of multistage dedusting dehydrating demisting Technology, effectively facilitate and accelerate gas-solid-liquid three phase dynamic efficiently mix, condense, aqueous vapor separation, improve system and device to thin The grade dust-collection efficiency and gas dust separation efficiency of grain thing.Branch art is purified compared to the modern flue gas wet dust removal generally improved, The utility model smoke dust discharge concentration can reach≤5mg/Nm3；

（2）The utility model low energy consumption operation characteristic is notable.Metallurgical slag processing procedure flue gas wet type unsteady flow dedusting and wet type Compare under electrostatic device for deep cleaning system, identical outlet drain concentration, it is net compared to the modern flue gas wet dust removal generally improved It is low by 20% that change apparatus and system always hinders damage；Two-fluid is provided with due to being coagulated in mist in section and primary gas-liquid separation and aerosol preregulator area Spray gun or thin liquid mist spray gun, improve non-constant section Venturi rod grid combination layer, spraying spray washing area and reverse spray type foam outstanding The floating descending dedusting classification efficiency for washing separator and system to fine particle, so as to can change generally in spray washing section In the section to reach that higher dust separation efficiency uses the way of big liquid-gas ratio transition washing, under lower liquid-gas ratio Higher dust separation efficiency is reached, the internal circulating load of circulation fluid is reduced.So as to reduce total power consumption of system for wet purification.Phase 24% can be reduced by being used for liquid-gas ratio under dedusting, equal conditions than usual Wet-type spray scrubbing tower cleaning system, just be can reach ideal and removed Dirt efficiency.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 Reduce fan energy consumption.Compared with usual Wet-type spray scrubbing tower, in the case that total spray liquid measure is constant, and due to reduction spray The liquid-gas ratio of scrubber layer, then total power consumption of detergent circulator can reduce, by spraying drench scrubber layer spray liquid measure account for total cleaning solution 80% meter of amount, 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 sharp 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）The utility model anti-stick, scale-preventing performance are stable, prominent.It is more suitable for the dust-laden steam of slag processing generation Flow the purification process of flue gas characteristic.The dust-laden steam stream smoke moisture that slag processing is produced is big, and water capacity is up to：13%--24%, The dust carried under one's arms is the superfine powder of slag, with the hydraulicity and adhesion, easily occurs fouling, flow resistance in cleaning equipment Increase.The utility model is by high dust content and low dust content, and coarseparticulate is removed to be placed in fine particle removal purification Double tower+wet electric unit is completed.Non-constant section Venturi rod grid group is set in preposition spraying spray scrubber, by Venturi rod grid group Bottom persistently provides the preferable water mists of water quality provided with the solidifying trapping area of mist, and the region is bubbling mass transfer area, gas-liquid turbulent flow Contact, flow of flue gas can increase, and make high dust content not without other components in addition to non-constant section Venturi rod grid group in tower Area efficient has stronger anti-stick, scale-preventing performance again while removing coarseparticulate；Rearmounted downstriker gas-liquid foam hangs Floating 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 connects Touch intensity strong；Air swirl, gas-liquid mixed agglomeration separation effectively improves the particle diameter width for removing spray film drop, effectively improves trip From the clearance of water, the fouling risk of rearmounted unit is also further reduced；Make rearmounted wet static dedusting unit dense in low dust-laden Degree region possesses superpower fine particle and removes that the knot part such as purifying rate and Inner portions pole plate is less scaling, failure, Long-Term Properties It is stable.On the one hand solve high dust content flue gas and be directly entered wet static dedusting device processing, pole pipe net sectional area is big, Installation area is big, the problem of investing high, and high dust content on the other hand is passed through into preposition efficient low-resistance dust separation technique The scaling rate and risk of successive depths cleaning unit are efficiently separated, be greatly lowered, wet static dedusting technique is used for height Fouling operating mode dedusting dehydrating demisting is possibly realized；High fouling operating mode wet dedusting technique is also set to reach that ultra-clean flue gas is arranged simultaneously Put.Otherwise, using the hot and humid fouling operating mode flue gas of common wet dedusting PROCESS FOR TREATMENT, export dust concentration >=80mg/ The component foulings such as Nm3, wet static dedusting technique Inner portion pole plate, failure risk increase, cause system to be difficult for long-term stable operation, Even paralyse.

（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. By flue gas segmentation and diversion, and in wet electrostatic device for deep cleaning lower chamber back taper bucket shape space, outer rim expands the blade of shape Dissipate, uniform rising, the again flue gas even distribution device through being set on lower chamber section force air flow guiding distribution, its flue gas even distribution device It is made up of some sphericals, spherical beading rod assembly, makes the air-flow formation uniform speed airflow of turnover electric field, reduce 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, provided with spray-type humidifier, the dust-laden vapor stream flue gas entered before electric field is set to enter-walk humidification, coalescence, simultaneously 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 high fouling system;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;Along the rotation of spheroid face when flue gas is upper in the space that spherical group is formed Diverging is uniform, its flue gas even distribution superior performance, also enables the equal distribution system of flue gas rectification to clear up replacing and work convenient simple, Spherical is serially connected on spherical beading rod, and its gap is adjustable, spherical quantity can increased or decreased, be easy to determine by simulated test 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）The utility model system footprint area is small, and cost of investment and operating cost are low.Preposition spraying spray scrubber, Primary dust removing purification efficiency is more than bulky grain dirt mud in 95%, outer spoil disposal water and occupies larger specific gravity.Due to setting this in its tower bottom Plastic state plaster is received to obtain in the primary plaster settling vessel outlet of patent meaning shallow-layer formula, is easy to convey, is transported and later stage disposal；So that into The suspension mass concentration of circular water treating system is greatly lowered, at the recirculated water of usual flue gas wet dust removal cleaning system Reason system is compared, and circular water treating system floor space reduces by 1/3, comprehensive water treatment system operating cost and reduces by 40%, sludge body Product reduces more than 40%, and dirt mud processing cost reduces 30%, is circulated while mitigating significantly because high suspended matter mass concentration muddy water enters The phenomenons such as abrasion, fouling, burn into blocking that grid system is brought.The tower of processing unit three is concatenated, compact in design, floor space Small compared to usual spray column, 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 is separated to be amplified with aerosol preregulator area section, primary gas-liquid separation efficiency high;Because system is used by thick to smart dedusting step by step Purification, dust separation intensity gradually become the clean technology of strong, multistage dedusting dehydrating demisting, high dust content are passed through preposition efficient Low-resistance dust separation process efficient is separated, and the occupation of land and investment of subsequent wet electrostatic depth cleaning unit is greatly lowered, in phase With processing air quantity under the conditions of, capital cost, equipment investment expense is below oneself technology.

（6）All spray guns of the utility model device are provided with floor installation on outer tower wall, are equipped with single spray gun barral of a gun One or several nozzles, operating personnel can implement overall maintenance to spray gun outside tower and change or dismount.Realize that online do not shut down is torn open Dress maintenance, enters without personnel and maintenance is dismounted in tower, improves the working condition of operation maintainer, swift to operate, safe, can Lean on.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

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

Fig. 3 is Fig. 2 upward view.

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 that shaftless screw is defeated 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.

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 Sprayed between area B provided with venturi in intercept layer 5, the solidifying trapping area A of the mist provided with one group of double-current spray gun body 6 or one group of thin liquid mist Spray gun 7 or one group of double-current spray gun body 6 are combined with thin liquid mist spray gun 7, from bottom to top provided with some 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 and aerosol are pre- in direction Provided with primary gas-liquid separation and aerosol preregulator 9 in Tiao Qi areas C, the primary gas-liquid separation and aerosol preregulator area C flue gas Entrance top is provided with double-current spray gun body 6, and the primary gas-liquid separation and airflow area of section in aerosol preregulator area C are big In the airflow area of section of spraying spraying layer 8.

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, the spraying of nozzle edge Arranged for interval above and below 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.

As the further improvement of above-mentioned technical proposal, the venturi injection intercept layer 5 is non-by two layers or more than two layers 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.

As the further improvement of above-mentioned technical proposal, the lower end of the spraying spray scrubber I is washed provided with spraying spray 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 primary plaster settling vessel of the shallow-layer formula 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 and the input of Shaftless screw conveyor 13 connect 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 separation.

As the further improvement of above-mentioned technical proposal, the downstriker gas-liquid foam suspension air swirl dehydrating tower II is wrapped Include the descending washing separator 16 of the reverse spray type foam suspension being sequentially connected from top to bottom and inward turning flue 17, the reverse spray type foam The smoke inlet end of the descending washing separator 16 of suspension is connected flue 1 with increasing mist formula and connected, 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 It is more than 1.3 to for inverse cigarette airflow direction, hydraulic spray nozzle and the descending washing separator 16 entrance section distance of reverse spray type foam suspension 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 It is higher by the outer wall of eddy flow dewatering cavity 20 above the plate face of blowdown inclined clapboard 21, the lower end of blowdown inclined clapboard 21 and is provided with muddy water floss hole 22, the surface of inward turning flue 17 is provided with the water fog generator 23 being located in eddy flow dewatering cavity 20, 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, provided with reverse V-shaped in described 28 times parts of lower chamber Air distributor 31, if the top of the lower chamber 28, which 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 exhanst gas outlet constant-current stabilizer 33 is provided with the flusher 34 being located 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, and temperature control exists 100-120 DEG C, the lower end of 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.

As the further improvement of above-mentioned technical proposal, the reverse V-shaped air distributor 31 includes support frame 38 and installed Blast cap in the upper end of support frame 38, the blast cap include inverted cone 39 and it is some be 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.

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

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, the dust-laden steam stream flue gas drawn from Slag treatment device, from smoke-intake pipe road and level Face is in oblique spraying spray scrubber under 14 ° of angles, the first washing of cleaning solution counter current contacting, the cooling with being let out under spray.

The up certain distance of flue gas, in smoke inlet cross section between non-constant section Venturi rod gate layer on appropriate section In inverse air-flow, double-current spray gun body or one group thin liquid mist spray gun a group by a group 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 Amount and the droplet group close compared with fine dust particles size or the droplet group of absorbent, and form higher mist field density, thus, shape The function of fine particle and respirable dust as the droplet group of core is included using 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 passes through strike several times, produces very tiny particle.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 it is a large amount of from double-current spray gun body or the mixed flue gas of the spray particles group of the newly-increased injection of 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 the space of two layers of non-constant section Venturi rod grid in non-constant section Venturi rod gate layer, spray in tower and under The dust-laden mixed flue gas formation suspension changing of the relative positions of cleaning solution and upstream carrying aerosol, the contact of gas-liquid turbulent flow, flow of flue gas energy Increase turbulent flow between gas, solid, liquid three-phase to contact, occur fierce inertial collision, cohesion and intercept, 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；The most Venturi rod section of the one layer of non-constant section Venturi rod grid in bottom Last layer Venturi rod section adjacent less than its so that mixing wastewater with air flue gas on the downside of the larger cross-section Venturi rod it is tangential import compared with Space between the Venturi rod of heavy in section, when mixing wastewater with air flue gas is accelerated by space between larger cross-section Venturi rod grid, So as to which the bubbling for forming stronger " surrounding gas with liquid " sprays state, gas-liquid turbulent flow contact strength is greatly increased, is 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 drenching in scrubbing section B from bottom to top provided with individual layer or dried layer spraying spraying layer.

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 Layer is single unidirectional or two-way water smoke hollow cone spray tip or single, double to water smoke solid nozzle, and its spray tip is along tower center Spaced certain distance is arranged up and down；Can also be that some its every layer of 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 list, Two-way water smoke solid nozzle, its spray tip is arranged along spaced certain distance above and below tower center；All spray guns are provided with bottom Seat is installed on outer tower wall, and operating personnel can implement integral replacing dismounting outside tower to spray gun.

Spray liquid of spraying uses unit style applicator designs, and spraying spraying layer spray washing liquid and process water are 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 up pass through 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 using 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 Group is dripped, and forms higher mist field density；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 dust separation, is imported under blower negative pressure effect and increases 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 enters in the downstriker gas-liquid foam suspension air swirl dehydrating tower provided with reverse spray type bubble The descending washing separator of foam suspension.

The dust-laden vapor stream dust-laden steam stream flue gas with higher water smoke field density 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 is more than with the descending washing separator inlet cross-sectional distance of reverse spray type foam suspension 1.3 rice；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 in the contact of high speed anti-phase turbulent flow, it passes the gas through the liquid film foam area of a 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 and 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, and gas-liquid is centrifuged；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, sprays in the inward turning flue entrance provided with water fog generator, air water 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 handled into circular water treating system.

And the air water mist that the water fog generator nozzle that favorable current is set above the inward turning flue entrance is imported is carried, in institute State in inward turning flue, flue gas and water smoke eddy flow are made again, mixes, condense, 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, which is collected and is discharged into muddy water by muddy water floss hole, discharges liquid packing 42.

Coupled in inward turning flue bottom by connecting flue with the blower fan power station import；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, that the dust-laden vapor stream flue gas of multistage dedusting dehydrating demisting enters wet electrostatic is deep Spend the fast current stabilizations of, Minus in clarifier smoke inlet up, then the blade through the reverse V-shaped air distributor is by flue gas segmentation and diversion, It is uniform to rise, again through lower chamber section and outer rim spreads in the lower chamber back taper bucket shape space of wet electrostatic deep purifier 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, Make the air-flow formation uniform speed airflow of turnover electric field, 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, makes to enter before 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, 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 flue gas even distribution device to clear up replacing and work 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 be 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 in the corrosion-resistant high pressure resistant synthetic resin ball plastics ball of high-strength high temperature-resistant on metal rod.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, to remove the grit in flue gas, droplet and aerosol etc., so as to reach pair The purification of flue gas.By 0 ~ 80 kilovolt（It is adjustable）The electric introducer in high-pressure pulse direct current source in, make to be suspended on the corona electricity in device Electrode systems constantly launch electronics, and portion gas between electrode is ionized into negative ions, and the particle such as dirt encounters ion and charged, presses According to the principle that identical charges repel each other, 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 mixed with slurries, while removing most of aerosol in flue gas, make 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 provided with filling 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 is arranged even into outside aiutage, and exhanst gas outlet constant-current stabilizer uses and uniformly opens round-meshed plate face, plate face For metal material；Exhanst gas outlet constant-current stabilizer is arranged below-group flusher, the flusher includes anode tube and rinses layer Layer is rinsed with cathode line, above the electric field region 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 on the outside of upstriker wet electrostatic deep purifier and higher than the electric field region.

Spray scrubber washing sewer of spraying is collected through spray scrubber dirt collecting bucket of spraying, and institute is discharged into by blow-off line The primary plaster settling vessel of shallow-layer formula is stated, the primary plaster settling vessel of the shallow-layer formula 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, sideways provided with first Spraying spray scrubber muddy water floss hole after separation, outer spoil disposal water is discharged into 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, Suspension bulky grain, which slows down, in muddy water is settled into the underflow of concentration, 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 inversed taper platform build muddy water shallow layer tank side is discharged into circulating water treatment system System, further completes cooling, clarification in precipitation pond, and supernatant enters circulatory pool and made 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 is discharged into circular water treating system circulatory pool and 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, draws from Slag treatment device Dust-laden steam stream humidity of flue gas it is high：13%--15%, the dust carried under one's arms is the superfine powder of slag, with the hydraulicity and glutinous （Knot）Property.In terms of dust-laden particle diameter distribution：Shared percentage by volume/%：10 μm of particle diameter ＞ accounts for 56%, and 2--10 μm of particle diameter accounts for 32% 2 μm of remaining ＜ 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

Handle 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： Spray spray scrubber void tower velocity of flue gas 4.5-6 (m/s)；Water smoke in downstriker gas-liquid foam suspension air swirl dehydrating tower II Two groups of suspension foam column；Double-current two groups of spray gun body；Thin one group of spraying some groups of spray gun of spray of liquid mist spray gun；Shallow-layer formula is primary Plaster settling vessel cuts out the dirt mud amount 2.4t/d that moisture content is about 72% from shaftless single step helical conveyer and can directly transported outward.Circulation Water treatment system floor space reduces by 1/3, comprehensive water treatment system operating cost and reduces 40%, and sludge volume reduces more than 40%, Dirt mud processing cost reduces 30%, while mitigating significantly because high suspended matter mass concentration muddy water is brought into recirculated water pipe network system Abrasion, fouling, burn into block etc. phenomenon.Wet type unsteady flow dust pelletizing system section port dust contained flue gas concentration≤30mg/Nm³, it is wet Formula electrostatic advanced purification system exiting flue gas dust content≤10mg/Nm^3,, i.e. the utility model apparatus and system aiutage flue gas Export dust content≤10mg/Nm³, efficiency of dust collection reaches 99%, and Pa≤1700Pa, exiting flue gas temperature are damaged in dedusting and purifying device resistance 54 DEG C of degree.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, cloth Office is compact, and dedusting and purifying device includes blower fan power station, aiutage etc. in interior floor space only 150m²Square metre.In identical Handle under the conditions of air quantity, capital expenditure expense, equipment investment expense and operating cost, which are below oneself, liquid under technology, equal conditions Gas ratio can reduce 33%, the special emission limit requirement of the atmosphere pollution new better than country.Be wet purification technology of new generation and Device.It is widely used in the high temperature, high humidity, viscosity of the industries such as steel, non-ferrous metal, cement building material, electric power, chemical industry greatly and containing height The flue gas wet down dust separation of ratio resistance dust；Suitable for flue gas desulfurization and dedusting and gas purification, flue gas coal gas can be used for Purification cooling 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 including spraying spray 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, the downstriker gas-liquid foam suspension air swirl dehydrating tower lower end outlet 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, Spray 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 Sprayed provided with venturi in intercept layer, the solidifying trapping area of the mist provided with one group of double-current spray gun body or one group thin liquid mist spray gun or one group Double-current spray gun body is combined with thin liquid mist spray gun, if from bottom to top provided with dried layer spraying spraying layer in the spraying spray washing area, 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, the primary gas-liquid separation with aerosol preregulator area provided with primary gas Liquid is separated is provided with two-fluid spray with aerosol preregulator, the primary gas-liquid separation and the smoke inlet top in aerosol preregulator area Rifle, the primary gas-liquid separation is more than the airflow of spraying spraying layer with the airflow area of section in 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 that bi-directionally or uni-directionally nozzle can be that single unidirectional or two-way water smoke is hollow Bore arranged for interval, institute above and below nozzle or single unidirectional or two-way water smoke solid nozzle, nozzle edge spraying spray scrubber center 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 layers or more than two layers 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 are 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 the primary plaster settling vessel of shallow-layer formula, the primary plaster settling vessel bag of the shallow-layer formula 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 The input connection of lower end and Shaftless screw conveyor, 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 separation.

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 Suspend descending washing separator and inward turning flue, and the smoke inlet end of the descending washing separator of reverse spray type foam suspension is with increasing Water smoke is sequentially provided with from top to bottom and is suspended in the connection flue connection of mist formula, the descending washing separator of reverse spray type foam suspension steeps 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, hydraulic spray nozzle with reverse spray type foam suspension is descending washes 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, the inward turning flue The eddy flow dehydration cavity outer wall that end is run through blowdown inclined clapboard and is higher by above blowdown inclined clapboard plate face, blowdown inclined clapboard lower end is provided with The water fog generator being located in eddy flow dewatering cavity is provided with directly over muddy water floss hole, 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 under lower chamber in part, if the lower chamber top is arranged with dried layer flue gas even distribution device, institute State and exhanst gas outlet constant-current stabilizer is provided with upper chamber, the flushing being located in upper chamber is provided with below the exhanst gas outlet constant-current stabilizer Device, the upper chamber is externally provided with some electric insulation casees, and the electric insulation case uses electrical heating inside holding form, and temperature control exists 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 side wall of the connection flue and wet electrostatic deep purifier smoke inlet is tangential 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 It is distributed on the beading rod in same level, the beading rod and is serially connected with some spherical surface bodies, the spherical surface body is nonmetallic Solid or hollow spheric body, the beading rod is the bar of the outer preservative treatment of solid or hollow rod or metal material of metal material Part, the exhanst gas outlet constant-current stabilizer is that round-meshed plate face is uniformly opened on 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 smoke or air water mist generation devices.

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, the smoke-intake pipe road is horizontal by 12-16 °, and the Way in smoke-intake pipe road is down.