CN106731403A

CN106731403A - The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning

Info

Publication number: CN106731403A
Application number: CN201611268898.6A
Authority: CN
Inventors: 陈振华; 管序荣; 孔德明; 胡可庆
Original assignee: Jiangsu Boji Environment Engineering Co Ltd; Shanghai Baosteel Energy Service Co Ltd
Current assignee: Jiangsu Boji Environment Engineering Co Ltd; Shanghai Baosteel Energy Service Co Ltd
Priority date: 2016-12-31
Filing date: 2016-12-31
Publication date: 2017-05-31

Abstract

The present invention relates to the flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning.Including spraying spray scrubber and downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, the spraying spray scrubber upper end outlet is connected with end entrance on downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower by being connected flue, the spraying spray scrubber bottom side of the wall is provided with smoke-intake pipe road, the side wall of the downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower is provided with smoke pipeline, the spraying spray scrubber is the wet type multilayer gas-liquid counter current way of contact, the downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower is gas-liquid co-current contact mode.The present invention can adapt to high temperature, high humidity, the metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting of high viscosity flue gas characteristic and device for deep cleaning, make it that ultralow smoke dust discharge concentration is stably reached under the conditions of low energy consumption, meet stricter environmental pollution and administer emission request.

Description

The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning

Technical field

The present invention relates to the dust arrester of prevention and control of air pollution, more particularly to metallurgical slag processing procedure flue gas high-efficiency low energy consumption Dedusting and device for deep cleaning, belong to flue-gas dust-removing and desulfurization purifier technical field, it is also possible to for the purification of flue gas coal gas Cooling system.

Background technology

Dust-laden steam stream flue gas is the more disposal of pollutants flue gas of iron and steel metallurgical industry, and slag processing and utilization is that dust-laden steams The typical generating source of steam flow flue gas.Domestic Comprehensive Utilization of Steel Slag handling process is due to steelmaking equipment, technique, slagging regime, slag thing Change performance diversity, Slag treatment utilization ways present variation, but during Slag treatment high-temperature slag when by quick water quenching Produce substantial amounts of superheated steam, steam slag micronic dust diffusion of carrying under one's arms is inevitable, its main component be metal oxide particle, Vapor, pollutes to regional environment.

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 the discharge index of 50mg/Nm3, but shortcoming is also obvious：Not only Investment and operating cost are high, it is big to take up an area, and the cycle is long during construction, the most important be the tail gas water capacity be up to 13~ 24%, the dust carried under one's arms is the superfine powder of slag, and property is similar with concrete, with the hydraulicity and the solidifying property of glue (knot), in cloth May be easily hardened on bag or sintered plate, cause deashing difficult.

According to conventional such engineering practice and detection data:10 μ are less than in the dust-laden steam stream flue gas that slag processing is produced M dust sizes account for percentage by volume about 32-44%.Percentage by volume shared by pellet is higher, traps difficulty Greatly, while in Slag treatment device operation process, due to the slag of slag（Composition, temperature）Differ, so tail gas dust concentration, The fluctuation of exhaust gas volumn is larger.

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 usual Wet-type spray purifying column due to Dirt technique is caught using common spray washing, to particle diameter for the classification efficiency of 0--5 μm of fine particle is only 60%-72%, to 5- The classification efficiency of 10 μm of respirable dusts is only 80%-90%, and total efficiency of dust collection is less than 90%, it is impossible to stably reach atmosphere pollution The special emission limit requirement of thing.

In recent years, more iron and steel enterprise uses flue spray-on process or traditional wet spray washing PROCESS FOR TREATMENT slag processing The dust-laden steam stream flue gas that process is produced, but smoke catching effect is poor, and separated without reliable aqueous vapor, form cloud and carry under one's arms, lead to Aiutage diffusion is crossed, causes pellet on a large scale exceeded.

The Wet-type spray scrubbing tower of new generation for generally improving, at the slag higher of percentage by volume shared by suction particulate matter Manage under the dust-laden steam stream exhaust gas dust size distribution for producing, dedusting gross efficiency is 86.5%--94.5%, it is also difficult to adapted to More and more strict national atmosphere pollutants emission standardses or tightened up regional environmental quality control standard.

The reason for generally Wet-type spray scrubbing tower is relatively low to pellet clearance is relevant with its washing process mode, Traditional Wet-type spray scrubbing tower generally uses mechanical dehydration demisting before exhanst gas outlet, and this mode is only big to more than 40 μm Drop has preferable clearance, relatively low to micron order fine particle in flue gas and aerosol clearance, particularly dust-laden steam stream High-temperature flue gas moisture content is high, and a large amount of washing liquid mists and flushing droplet formation are with respirable dust particulate matter as the nuclei of condensation in flue gas Water smoke, with flue gas output diffuse, pollute environment, aggravate haze, cause harm health.Also usual Wet-type spray washing system is made Total efficiency of dust collection is difficult to improve.

Usual Wet-type spray scrubbing tower, plaster fully enters circular water treating system in sewage, and system footprint area is big, one The investment of secondary property is high, sedimentation tank mud amount is big, desilting, transport, etc. operation processing cost it is high；Particularly high concentration suspension is easily blocked up Plug flow road.

The Wet-type spray scrubbing tower of new generation for generally improving is used for high temperature, high humidity, high viscosity flue-gas dust removal and purification, particularly The dust-laden steam stream flue-gas dust removal and purification that slag processing is produced, the easy fouling of runtime, plant maintenance amount is big, costly.

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 transition washing using transition washing, liquid-gas ratio Height, quantity of circulating water is more, and purifier and system dampness are high, increases energy consumption.

Spraying spray section superficial linear velocity in a column is relatively low, and tower diameter is larger, and Ta Neibu liquid is difficult to uniformly, running efficiency of system reliability Difference etc..

Steel and iron industry is the basic industry of modern economic construction, modern national defense, is also resource, major power consumer, energy-conservation Emission reduction tasks are urgent and heavy.It is most tight in the history that China newly revises《Air Pollution Prevention Law》It is formal to implement, in atmosphere pollution Control aspect, on 2 27th, 2013, country determined that the industries such as steel, cement will start to perform atmosphere pollution in different periods The special emission limit of thing.Reinforcing respirable dust, particularly fine particle（PM2.5）Improvement.Atmosphere pollution is especially arranged Put limit value requirement further strict,

It is strong etc. especially for high temperature, high humidity and the hydraulicity and the solidifying property of glue (knot) the need for meet industrial enterprise's pollution control Flue gas characteristic, the flue gas high-efficiency low energy consumption dedusting of exploitation higher performance and device for deep cleaning and system have turned into pollution emission reduction Urgent task.

The content of the invention

For drawbacks described above, it is an object of the invention to provide the smelting that can adapt to high temperature, high humidity, high viscosity flue gas characteristic Golden Slag treatment process flue gas high-efficiency low energy consumption dedusting and device for deep cleaning, make it be stably reached under the conditions of low energy consumption ultralow Smoke dust discharge concentration, meets the metallurgical slag processing procedure flue gas high-efficiency low energy consumption that stricter environmental pollution administers emission request Dedusting and device for deep cleaning.

For this technical solution adopted in the present invention is：

Including spraying spray scrubber and downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, the spraying Spray scrubber upper end outlet passes through with end entrance on downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower Connection flue connection, the spraying spray scrubber bottom side of the wall is provided with smoke-intake pipe road, the downstriker gas-liquid foam suspension The side wall of air swirl deep purifying dehydrating demisting tower is provided with smoke pipeline, and the spraying spray scrubber is wet type multilayer gas Liquid counter current contacting mode, the downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower is gas-liquid co-current contact Mode.

As the further improvement of above-mentioned technical proposal, in the spraying spray scrubber above smoke-intake pipe road from bottom to top It is sequentially provided with the solidifying trapping area of mist, spraying spray washing area and primary gas-liquid separation and aerosol preregulator area, the solidifying trapping area of the mist Venturi injection intercept layer is provided between spraying spray washing area, be provided with the solidifying trapping area of the mist one group of double-current 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, are set from bottom to top in the spraying spray washing area If there is 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, downwards, the nozzle of other spraying spraying layers is bi-directionally or uni-directionally nozzle, the primary gas-liquid separation and aerosol in direction Primary gas-liquid separation and aerosol preregulator are provided with preregulator area, the primary gas-liquid separation enters with the flue gas in aerosol preregulator area Double-current spray gun body is provided with above mouthful, the primary gas-liquid separation is more than spray with the airflow area of section in aerosol preregulator area The airflow area of section of spray painting drenching layer.

Used as the further improvement of above-mentioned technical proposal, the bi-directionally or uni-directionally nozzle of other spraying spraying layers can be Single unidirectional or two-way water smoke hollow cone nozzle or single unidirectional or two-way water smoke solid nozzle, nozzle is along spraying spray washing The upper and lower arranged for interval in tower center, the bi-directionally or uni-directionally nozzle of other spraying spraying layers can be several unidirectional or two-way water Atomizing 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 collects by blow-off line Device, the shallow-layer formula primary plaster collector 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 deep purifying takes off Water deentrainment tower includes the reverse spray type foam suspension washer, combined type air swirl dehydrator and the dehydration that are sequentially connected from top to bottom Device dirt collecting bucket, the smoke inlet end of the reverse spray type foam suspension washer hangs with flue connection, the reverse spray type foam is connected If being sequentially provided with water smoke suspension foam maker and the export-oriented spiral board of dried layer in floating washer from top to bottom, the water smoke suspends 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 airflow direction, and direction is upward, The combined type air swirl dehydrator includes dehydrator outer barrel, dehydrator inward turning cylinder and inclined clapboard, the dehydrator inward turning cylinder In dehydrator outer barrel and axis is consistent, the inclined clapboard is located at dehydrator outer barrel upper end, the dehydrator inward turning cylinder End entrance is higher than inclined clapboard plate face on inclined clapboard and dehydrator inward turning cylinder, and the dehydrator inward turning cylinder upper end porch is pleasant Stream is provided with water fog generator, the annular space that the dehydrator outer barrel is surrounded with dehydrator inward turning drum outer wall below inclined clapboard It is eddy flow drying zone, in the eddy flow drying zone that the dehydrator inward turning cylinder lower end outlet is turned back upward, is sequentially provided with from bottom to top If if dried layer export-oriented dedusting dehydration spiral board, the export-oriented dehydrating demisting spiral board of dried layer, intercept water ring, it is described intercept water ring with tiltedly every The side wall of the dehydrator outer barrel between plate is provided with tangential outlet, and the smoke pipeline is connected with tangential outlet, described export-oriented Dedusting dehydration spiral board upper and lower ends are respectively equipped with two-way normally opened water fog spraying gun, the export-oriented dehydrating demisting spiral board upper and lower two End is respectively equipped with two-way gap and rinses water fog spraying gun.

Used as the further improvement of above-mentioned technical proposal, the hydraulic spray nozzle cuts with reverse spray type foam suspension washer entrance , from more than 1.3 meters, for annular, the ring that intercepts water is along dehydrator outer tube inner wall circumference for the ring that intercepts water for identity distance.

Used as the further improvement of above-mentioned technical proposal, the combined type air swirl dehydrator area of section is more than inverse spray Formula foam suspension washer area of section, the lower end of the dehydrator dirt collecting bucket is provided with dehydrator muddy water floss hole, it is described tiltedly every Dehydrator outer tube side wall above plate lower end is provided with muddy water floss hole.

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 downward.

It is an advantage of the invention that：

1st, the present invention is less than 10 μm of dust to the udst separation efficiency high of flue gas in the dust-laden steam stream flue gas that slag processing is produced Particle diameter accounts for percentage by volume about 32-44%, even if generally the low energy Wet-type spray purifying column of optimization design is used for gas cleaning Dedusting, due to using common wet dust removal structure, it is to particle diameter for the classification efficiency of 0--5 μm of fine particle is only 60%- 72%, the classification efficiency to 5-10 μm of respirable dusts is only 80%-90%, higher to percentage by volume shared by suction particulate matter Slag processing produce the total efficiency of dust collection of dust-laden steam stream flue gas can be less than 90%, it is impossible to stably reach atmosphere pollution special Emission limit requirement, will reach stricter emission request, realize the efficiency upgrading of wet flue gas spray-absorption purifier, It is to turn into key problem in technology less than the classification efficiency of 10um particulate matters to particle diameter to improve it.The present invention is respectively adopted the solidifying trapping of mist, non- The speed-raising injection of uiform section Venturi rod grid combination layer forms froth bed, spraying spray washing and primary gas-liquid separation and aerosol is pre- Adjust, then through downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting, using reverse spray type foam suspension washer with Combined type air swirl dehydrator is combined through series connection, step by step, crescendo, the clean technology of multistage dedusting dehydrating demisting, effectively facilitate and Quickening gas-solid-liquid three phase dynamic efficiently mixes, condenses, aqueous vapor is separated, and improves classification dedusting effect of the system and device to fine particle Rate and gas udst separation efficiency.Branch art is purified compared to the modern flue gas wet dust removal for generally improving, total udst separation efficiency is carried It is high by 13%, smoke dust discharge concentration can reach≤15mg/Nm³。

2nd, low energy consumption operation characteristic of the present invention is notable.The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and deep purifying Apparatus and system, compares under identical outlet drain concentration, compared to the modern flue gas wet dust removal purifier for generally improving and is The total resistance of system damages low by 20%；Due to being provided with double-current spray gun body or thin liquid in the solidifying section of mist and primary gas-liquid separation and aerosol preregulator area Spray painting rifle, improves non-constant section Venturi rod grid combination layer, spraying spray washing area and reverse spray type foam suspension washer dress Put and system is to the dedusting classification efficiency of fine particle, be raising system so as to change generally in the section in spray washing section The ability of fine particle is trapped, the way for reaching udst separation efficiency higher and using big liquid-gas ratio transition to wash, lower Liquid-gas ratio be issued to udst separation efficiency higher, reduce the internal circulating load of circulation fluid.So as to reduce system for wet purification Total power consumption.It is used for dedusting compared to usual Wet-type spray scrubbing tower cleaning system, 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, purifier and system dampness It is corresponding to reduce, also just reduce fan energy consumption.Compared with usual Wet-type spray scrubbing tower, in the case that total spray liquid measure is constant, Again due to the liquid-gas ratio of reduction spray washing layer, then total power consumption of detergent circulator can reduce, and drenching scrubber layer by spraying sprays Liquid measure accounts for 80% meter of total amount of liquor, then power consumption declines 4%；Rearmounted downstriker gas-liquid foam suspension air swirl deep purifying takes off Water deentrainment tower, is combined using reverse spray type foam suspension washer with combined type air swirl dehydrator, and reverse spray type foam suspension is washed Gas-liquid two-phase is contacted in high speed anti-phase turbulent flow in washing device, not only make use of gas phase energy, and is effectively utilized liquid phase energy, is dashed forward Aobvious low-energy-consumption high-efficiency operation characteristic；The combination of combined type air swirl dehydrator realizes that low energy consumption is dehydrated wet down demisting.

3rd, circular water treating system floor space of the present invention is small, and comprehensive circular water treating system operating cost is low.Preposition spray Mist spray scrubbing tower, primary dust removing purification efficiency is more than 95%, and bulky grain dirt mud occupies larger specific gravity in outer spoil disposal water.Due to Its tower bottom sets this patent meaning shallow-layer formula primary plaster collector outlet and receives to obtain plastic state plaster, be easy to convey, transport and after Phase is disposed；So that the suspension mass concentration into circular water treating system is greatly lowered, it is net with usual flue gas wet dust removal The circular water treating system of change system is compared, and circular water treating system floor space reduces by 1/3, comprehensive water treatment system running cost With reducing 40%, sludge volume reduces more than 40%, and dirt mud processing cost reduces 30%, while mitigating significantly because of high suspended matter quality The phenomenons such as abrasion, fouling, burn into blocking that concentration muddy water brings into recirculated water pipe network system.

4th, anti-stick of the present invention, scale-preventing performance are stable, prominent；Dehydration Strong dehumidifying ability.It is more suitable for slag processing generation Dust-laden steam stream flue gas characteristic purification process.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, is easily occurred in cleaning equipment Fouling, flow resistance increases.Dust content high and low dust content, coarseparticulate removal are removed purification point by the present invention with fine particle It is placed in double tower completion.Non-constant section Venturi rod grid group is set in preposition spraying spray scrubber, by Venturi rod grid group bottom The solidifying trapping area of mist is provided with, the preferable water mists of water quality are persistently provided, and the region is bubbling mass transfer area, gas-liquid turbulent flow is contacted, Flow of flue gas can increase, and not without other components in addition to non-constant section Venturi rod grid group in tower, have dust content region high There are stronger anti-stick, scale-preventing performance；Rearmounted downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, it is inverse Spray formula foam suspension washer is combined with combined type air swirl dehydrator, and gas-liquid counter current contact, turbulent flow contact strength is strong；Gas Dynamic eddy flow, gas-liquid mixed agglomeration separation effectively improves the particle diameter width of removal spray film drop, low dust content region is possessed superpower Fine particle removal purifying rate and free water clearance, discharge fume droplet content≤75mg/Nm³。

5th, all spray guns of apparatus of the present invention are provided with floor installation on outer tower wall, on single spray gun barral of a gun equipped with one or Several nozzles, operating personnel can implement overall maintenance to spray gun outside tower and change or dismount.Realize that online shutdown dismounts maintenance, Enter without personnel and maintenance is dismounted in tower, improve the working condition of operation maintainer, it is swift to operate, safe and reliable.

6th, the present invention is due to the integrated equipment of processing unit, and compact in design, floor space is small compared to usual spray column.By In reducing tower is used, spraying spray section superficial linear velocity in a column is higher, and tower diameter is smaller, due to primary gas-liquid separation and aerosol preregulator area Section amplifies, and refined dedusting is arranged in downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, due to system Using by the thick clean technology for gradually becoming strong, multistage dedusting dehydrating demisting to smart udst separation step by step, udst separation intensity, double tower Concatenation, under the conditions of identical treatment air quantity, capital cost, equipment investment expense is below oneself technology.

Brief description of the drawings

Fig. 1 is structural representation of the invention.

1 it is spraying spray scrubber in figure, 2 is downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting Tower, 3 be connection flue, 4 be smoke-intake pipe road, 5 be smoke pipeline, 6 be venturi injection intercept layer, 7 be double-current spray gun body, 8 be Thin liquid mist spray gun, 9 be spraying spraying layer, 10 be primary gas-liquid separation and aerosol preregulator, 11 are spray scrubber dirt collections of spraying Bucket, 12 be blow-off line, 13 be inversed taper platform build muddy water shallow layer tank, 14 be Shaftless screw conveyor, 15 be dirt mud cut out pipeline, 16 it is spraying spray scrubber muddy water floss hole, 17 be reverse spray type foam suspension washer, 18 is the dehydration of combined type air swirl Device, 19 be dehydrator dirt collecting bucket, 20 be water smoke suspension foam maker, 21 be export-oriented spiral board, 22 be dehydrator outer barrel, 23 It is dehydrator inward turning cylinder, 24 be inclined clapboard, 25 be water fog generator, 26 be export-oriented dedusting dehydration spiral board, 27 is export-oriented Dehydrating demisting spiral board, 28 be intercept water ring, 29 be dehydrator muddy water floss hole, 30 be muddy water floss hole, I be the solidifying trapping area of mist, II it is spraying spray washing area, III is primary gas-liquid separation and aerosol preregulator area.

Specific embodiment

The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning, including the spraying He of spray scrubber 1 Downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2, the spraying upper end outlet of spray scrubber 1 is with End entrance is connected by connecting flue 3 on line gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2, the spraying The bottom side of the wall of spray scrubber 1 is provided with smoke-intake pipe road 4, the downstriker gas-liquid foam suspension air swirl deep purifying dehydration The side wall of deentrainment tower 2 is provided with smoke pipeline 5, and the spraying spray scrubber 1 is the wet type multilayer gas-liquid counter current way of contact, institute Downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2 is stated for gas-liquid co-current contact mode.

Used as the further improvement of above-mentioned technical proposal, the top of smoke-intake pipe road 4 is from lower in the spraying spray scrubber 1 On be sequentially provided with the solidifying trapping area I of mist, spraying spray washing area II and primary gas-liquid separation and aerosol preregulator area III, the mist is solidifying Venturi injection intercept layer 6 is provided between trapping area I and spraying spray washing area II, the mist is provided with one group in solidifying trapping area I Double-current spray gun body 7 or one group thin liquid mist spray gun 8 or one group of double-current spray gun body 7 are combined with thin liquid mist spray gun 8, and the spraying spray is washed If washing and being provided with dried layer spraying spraying layer 9 in area II from bottom to top, the spraying spraying layer 9 is made up of spray gun and nozzle, top The nozzle of spraying spraying layer 9 be unidirectional nozzle, downwards, the nozzle of other spraying spraying layers 9 is bi-directionally or uni-directionally nozzle in direction, Primary gas-liquid separation and aerosol preregulator 10, the primary gas-liquid are provided with the primary gas-liquid separation and aerosol preregulator area III Separate and be provided with double-current spray gun body 7 with the smoke inlet top in aerosol preregulator area III, the primary gas-liquid separation is presetting with aerosol Airflow area of section of the airflow area of section more than spraying spraying layer 9 in device area III.

Used as the further improvement of above-mentioned technical proposal, the bi-directionally or uni-directionally nozzle of other spraying spraying layers 9 can be with It is single unidirectional or two-way water smoke hollow cone nozzle or single unidirectional or two-way water smoke solid nozzle, nozzle is washed along spraying spray The upper and lower arranged for interval in the center of tower 1 is washed, the bi-directionally or uni-directionally nozzle of other spraying spraying layers 9 can be unidirectional or double for several To hydraulic spray nozzle, the nozzle plane projection of adjacent spraying spraying layer 9 is staggered in alternate.

Used as the further improvement of above-mentioned technical proposal, the venturi sprays intercept layer 6 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 1 is provided with spraying spray and washes Tower dirt collecting bucket 11 is washed, the lower end of the spraying spray scrubber dirt collecting bucket 11 is connected with the primary ash of shallow-layer formula by blow-off line 12 Mud collector, the shallow-layer formula primary plaster collector includes inversed taper platform build muddy water shallow layer tank 13, Shaftless screw conveyor 14 Pipeline 15 is cut out with dirt mud, the lower end of inversed taper platform build muddy water shallow layer tank 13 connects with the input of Shaftless screw conveyor 14 Connect, the upper end that the dirt mud cuts out pipeline 15 is connected with the output end of Shaftless screw conveyor 14, the frustum build muddy water is shallow The side in layer pond 13 is provided with the spraying spray scrubber muddy water floss hole 16 after just separating.

Used as the further improvement of above-mentioned technical proposal, the downstriker gas-liquid foam suspension air swirl deep purifying takes off Water deentrainment tower 2 includes the reverse spray type foam suspension washer 17, the combined type air swirl dehydrator 18 that are sequentially connected from top to bottom With dehydrator dirt collecting bucket 19, the smoke inlet end of the reverse spray type foam suspension washer 17 connects with flue 3 is connected, described inverse If water smoke suspension foam maker 20 and the export-oriented eddy flow of dried layer are sequentially provided with spray formula foam suspension washer 17 from top to bottom Plate 21, the water smoke suspension foam maker 20 is made up of one group of water fog spraying gun and hydraulic spray nozzle, and hydraulic spray nozzle injection direction is Inverse airflow direction, upwards, the combined type air swirl dehydrator 18 includes dehydrator outer barrel 22, dehydrator inward turning cylinder 23 in direction With inclined clapboard 24, the dehydrator inward turning cylinder 23 is located in dehydrator outer barrel 22 and axis is consistent, and the inclined clapboard 24 is located at de- The inner upper end of hydrophone outer barrel 22, the dehydrator inward turning cylinder 23 runs through end entrance on inclined clapboard 24 and dehydrator inward turning cylinder 23 and is higher than The plate face of inclined clapboard 24,23 upper end porch favorable currents of the dehydrator inward turning cylinder are provided with water fog generator 25, the dehydrator Outer barrel 22 is eddy flow drying zone, the dehydrator in the annular space that inclined clapboard is surrounded below 24 with dehydrator inward turning 23 outer walls of cylinder In the eddy flow drying zone that the 23 lower ends outlet of inward turning cylinder is turned back upward, if being sequentially provided with the export-oriented dedusting dehydration rotation of dried layer from bottom to top If flowing the export-oriented dehydrating demisting spiral board 27 of plate 26, dried layer, intercept water ring 28, the dehydration intercepted water between ring 28 and inclined clapboard 24 The side wall of device outer barrel 22 is provided with tangential outlet, and the smoke pipeline 5 is connected with tangential outlet, the export-oriented dedusting dehydration rotation The stream upper and lower ends of plate 26 are respectively equipped with two-way normally opened water fog spraying gun, the export-oriented upper and lower ends of dehydrating demisting spiral board 27 difference It is provided with two-way gap and rinses water fog spraying gun.

As the further improvement of above-mentioned technical proposal, the hydraulic spray nozzle and the entrance of reverse spray type foam suspension washer 17 Cross-sectional distance is more than 1.3 meters, and, for annular, the ring 28 that intercepts water is along the inwall circumference cloth of dehydrator outer barrel 22 for the ring 28 that intercepts water Put.

Used as the further improvement of above-mentioned technical proposal, the area of section of combined type air swirl dehydrator 18 is more than inverse The area of section of spray formula foam suspension washer 17, the lower end of the dehydrator dirt collecting bucket 19 is provided with dehydrator muddy water floss hole 29, The side wall of dehydrator outer barrel 22 above the lower end of the inclined clapboard 24 is provided with muddy water floss hole 30.

Embodiment 1

The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning include spraying spray scrubber 1 and downstriker Gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2, the spraying upper end outlet of spray scrubber 1 steeps with downstriker gas-liquid End entrance is connected by connecting flue 3 on foam suspension air swirl deep purifying dehydrating demisting tower 2；

Spraying spray scrubber 1 is the wet type multilayer gas-liquid counter current way of contact, the downstriker gas-liquid foam suspension air swirl Deep purifying dehydrating demisting tower 2 is gas-liquid co-current contact mode；

The top of smoke-intake pipe road 4 is sequentially provided with the solidifying trapping area I of mist, spraying spray washing area from bottom to top in spraying spray scrubber 1 II and primary gas-liquid separation and aerosol preregulator area III；

Downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2 includes the reverse spray type being sequentially connected from top to bottom Foam suspension washer 17, combined type air swirl dehydrator 18 and dehydrator dirt collecting bucket 19；

It it is in 14 ° from smoke-intake pipe road and plane from the dust-laden steam stream flue gas that Slag treatment device is drawn under the negative-pressure ward of blower fan Oblique spraying spray scrubber under angle, first with spray under let out cleaning solution counter current contacting washing, cooling.

The up certain distance of flue gas, in smoke inlet cross section to appropriate section between non-constant section Venturi rod gate layer 3 It is upper that in inverse air-flow, one group of gas double fluid spray gun body or thin liquid mist spray gun or double-current spray gun body and thin both spray guns of liquid mist spray gun are set Combination, the droplet group of liquid or the droplet group of absorbent are uniformly sprayed to the section, flue gas is mixed with.Obtain the region A large amount of and close compared with fine dust particles size droplet groups or the droplet group of absorbent, and form mist field density higher.By This, forming dynamic effectively cohesion, interception includes the work(of the droplet group of fine particle and respirable dust as core with suspended particulate Energy., it is necessary to control operation condition when double-current spray gun body or thin liquid mist spray gun often work, while supplying the compressed gas of certain pressure （Air or nitrogen, steam）With the water (or absorbing liquid) of certain pressure.Aero operating pressure at nozzle entrance under normal circumstances For 0.35-0.5 Mpa, the operating pressure of water or absorbent is 0.35-0.8 Mpa.Double-current spray gun body or thin liquid mist spray gun The solution of nozzle interior, compressed gas and water or absorbent produces very tiny particle by strike several times.Nozzle is normal During work, lance outlet liquid mist stream flow velocity reaches 25m/s-37m/s,

After the washing of cleaning solution counter current contacting, cooling, wet down that flue gas is let out under spray first, carry it is a large amount of by double-current spray gun body or Thin liquid mist spray gun increases the mixed flue gas of the spray particle group of injection newly upwardly through the non-constant section Venturi rod gate layer for setting,

Because venturi sprays intercept layer flue gas constriction in flow area, flue gas is at least two layers in non-constant section Venturi rod gate layer Or accelerate to pass through between the space of multilayer non-constant section Venturi rod grid, spray in tower and under cleaning solution taken with upstream Dust-laden mixed flue gas with aerosol form the suspension changing of the relative positions, and gas-liquid turbulent flow contact, flow of flue gas can increase between gas, solid, liquid three-phase Turbulent flow is contacted, and fierce inertial collision, cohesion occurs and intercepts, and substantially increases mass transfer, the heat transfer table between air-liquid two-phase Face, another aspect mixed flue gas pass through Venturi rod gate layer when, formed it is strong " with liquid surround gas " bubbling spray state, Cleaning system is improve to the capture rate of fine grit and the mass-transfer efficiency of gas purification.Circulating face accounts for basal area 30--65%.Institute Non-constant section Venturi rod grid cross sectional shape, the cloth column direction for stating the combination of non-constant section Venturi rod grid are identical；Every layer of venturi Rod grid are spaced substantially equidistant are constituted at grade by some solid poles or some hollow circular-tubes；Using multilayer non-constant section Spaced certain distance is set Venturi rod grid up and down, and adjacent two layers plane projection is in spaced, the most non-grade in one layer of bottom section The Venturi rod section of face Venturi rod grid is less than its adjacent last layer Venturi rod section, so that mixing wastewater with air flue gas is from larger The tangential space imported between larger cross-section Venturi rod in section Venturi rod downside, when mixing wastewater with air flue gas passes through larger cross-section When space accelerates between Venturi rod grid, so that the bubbling for forming stronger " surrounding gas with liquid " sprays state, significantly Increase gas-liquid turbulent flow contact strength, improve mixing wastewater with air flue gas and mix aggregation efficiency.

Dust-laden steam stream flue gas is upwardly into spraying spray washing area, spraying spray by non-constant section Venturi rod gate layer If individual layer or dried layer spraying spraying layer are provided with scrubbing section 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, because the primary gas-water separation and aerosol preregulator flue gas flow cross-section areas are more than the spraying spraying layer flue gas circulation Section, carries a large amount of in primary gas-liquid separation and the aerosol preregulator area upward certain distance space of entrance, in dust-laden vapor stream What can not be settled in spraying spray column includes the droplet group's particle of fine particle and respirable dust as core with suspended particulate Slow down delay, flocking settling；

The flue gas of removing dust purification in the primary gas-liquid separation and aerosol preregulator area smoke inlet space upwards it is appropriate away from Double-current spray gun body is set on section；The droplet group of liquid or the droplet group of absorbent are uniformly sprayed to the section, makes the region The droplet group of a large amount of and close compared with fine dust particles size water or the droplet group of absorbent are regained, and has been formed higher Mist field density；Through spray spraying layer and subsequent droplet group particle deceleration, cohesion, sedimentation, increase the udst separations such as mist again after contain Dirt steam flowing water mixes flue gas, and connection flue is imported under blower negative pressure effect；Dust-laden steam stream flue gas is mixed in connection flue With into downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower entrance be the reverse spray type foam after cohesion Suspension washer entrance.

Dust-laden vapor stream flue gas enters in the downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting, according to It is secondary to be provided with reverse spray type foam suspension washer, combined type air swirl dehydrator.

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 foam suspension washer, if it is export-oriented that water smoke suspension foam maker, dried layer are provided with reverse spray type foam suspension washer Spiral board；Water smoke suspension foam maker is made up of one group of atomized water spray nozzle and spray gun, and atomized water spray direction is inverse flue gas stream Direction；Atomized water spray nozzle is more than 1.3 meters with reverse spray type foam suspension washer entrance section distance；Cleaning solution is outstanding by water smoke The upward nozzle of floating foam maker spout is inversely sprayed into air-flow from bottom to top, and gas-liquid two-phase is contacted in high speed anti-phase turbulent flow, It passes the gas through a liquid film foam area for strong turbulence, and liquid surface area is big in froth zone and updates rapidly, Gas-liquid heat-transfer, mass transport process are enhanced, efficient cleaning dust purification and wet down is carried out again to flue gas.In reverse spray type foam In suspension washer water smoke suspension foam maker bottom appropriate location be provided with that if dried layer is separated by a certain distance can with isometrical or Can also waney export-oriented spiral board, make gas-liquid two-phase again by export-oriented spiral board carry out turbulent closure scheme, separate；With The combined type air swirl dehydrator that the isometrical export-oriented spiral board outlet of reverse spray type foam suspension washer is amplified for section.It is right In higher emissions requirement, the requirement of water smoke suspended lance water source is corresponding to improve.

Flue gas carries out entering described after the cleaning dust more stronger than abovementioned steps is purified through reverse spray type foam suspension washer Combined type air swirl dehydrator smoke inlet, the big dry reverse spray type foam suspension in the combined type air swirl dehydrator section is washed Wash device section；The combined type air swirl dehydrator includes that water fog generator, dehydrator inward turning cylinder, gas-liquid spray gun group feed flow are supplied Gas interface, spray gun group feed flow interface, blowdown inclined clapboard, muddy water floss hole, the ring that intercepts water, combined type air swirl dehydrator outer barrel, Export-oriented spiral board, dehydrator dirt collecting bucket, dehydrator muddy water floss hole, dehydrator inward turning cylinder are cylinder, for adapt to compared with The smoke dust discharge concentration of high request, in the dehydrator inward turning settable water fog generator of cylinder entrance top, flue gas cuts through described Combined type air swirl dehydrator epimere eddy flow, deceleration, gas-liquid separation that face is amplified；Eddy flow flue gas after gas-liquid separation is from described Dehydrator inward turning cylinder entrance enters, and carries the water fog generator nozzle that the dehydrator inward turning cylinder entrance top favorable current is set The water mists of importing, in dehydrator inward turning cylinder, make flue gas and water smoke eddy flow, mix, condense again, and bulky grain water smoke exists Gravitational settling in the downward space of dehydrator inward turning cylinder outlet, falls into the dehydrator dirt collecting bucket, collects, and from dehydrator collection Dirt bucket lower end dehydrator muddy water floss hole enters muddy water discharge liquid packing, and reverse spray type foam suspension washer separating liquid is by the row Dirty inclined clapboard is collected by muddy water floss hole and enters muddy water discharge liquid packing into circulation with the space that dehydrator outer barrel is surrounded Reuse after water treatment system treatment.

Flue gas is in dehydrator inward turning cylinder exit edge diffusion folding after udst separation in dehydrator inward turning cylinder Return and be upwardly into the eddy flow drying zone, from bottom to top, if flue gas is respectively through flowing the export-oriented dedusting dehydrating demisting eddy flow of dried layer Plate depth is clean, if again through flowing the export-oriented dehydrating demisting spiral board dehydrating demisting of dried layer, the moisture film that the ring that intercepts water will climb along wall Retention, the export-oriented dehydrating demisting spiral board upper and lower ends are respectively equipped with two-way gap and rinse water fog spraying gun, described export-oriented Dedusting dehydration spiral board upper and lower ends are respectively equipped with two-way normally opened water fog spraying gun；

Through above-mentioned steps step by step, crescendo, the dust-laden vapor stream flue gas after the cleaning of multistage dedusting dehydrating demisting is in the downstriker Gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower eddy flow drying zone upper end（Outlet side）Discharge, i.e. blowdown inclined clapboard Face tangential with combined type air swirl dehydrator outer barrel and the dehydrator inward turning tangent flue gas of cylinder export or uses footpath to have It is connected to outlet and with the exhanst gas outlet pipeline.

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 collector is stated, the shallow-layer formula primary plaster collector is by Shaftless screw conveyor（Or other sludge are defeated Go out machine）, dirt mud cut out pipeline, muddy water floss hole composition；The Shaftless screw conveyor refers to horizontal by a constant inclination Dou angles The shaftless single or double conveying worm of degree, by portions such as drive device, U-type groove, liner plate, upper lid, inversed taper platform build muddy water shallow layer tanks Part is constituted, and the inversed taper platform build muddy water shallow layer tank upper inlet connects with blow-off line, and side is provided with the muddy water row after just separating Put mouth.Outer spoil disposal water enters shallow-layer formula primary plaster collector by spray scrubber muddy water floss hole of spraying first, by falling Frustum build muddy water shallow layer tank, using shallow pool principle, realizes that solid-liquid is efficiently separated, and suspension bulky grain slows down and is settled into muddy water The underflow of concentration, is collected by the shaftless single or double helical feed machine inlet, and along horizontal by a constant inclination Dou angles Shaftless single or double conveying worm is gradually elapsed through Shaftless spiral blade and squeezes filter to dirt mud and cuts out pipeline discharge, is led to herein Normal moisture content is about 65% ~ 75% dirt mud, through the waste water after primary mud-water separation in the inversed taper platform build muddy water shallow layer tank side The spraying spray scrubber muddy water floss hole that face is provided with enters circular water treating system, further completes cold in pond is precipitated But, clarify, supernatant enters circulatory pool and recycled by circulating pump feed system equipment.

The downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower sewage discharges liquid packing through muddy water Circular water treating system circulatory pool is entered to be 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 the flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning and system.

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 24 × 10⁴m³/h

80 ~ 100 DEG C of input gas temperature

Dust inlet initial concentration 1000mg/Nm³

Under the negative-pressure ward of blower fan, from the dust-laden steam stream flue gas that Slag treatment device is drawn, from gas approach pipeline 1 and plane In oblique spraying spray scrubber under 15 ° of angles, first with the washing of cleaning solution counter current contacting, the cooling let out under spray.

The up certain distance of flue gas, in smoke inlet cross section to appropriate section between non-constant section Venturi rod gate layer 3 It is upper that in inverse air-flow, one group of 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, flue gas is mixed with.When double-current spray gun body or thin liquid mist spray gun normal work, the gas work at control nozzle entrance Make pressure for 0.42 Mpa, the operating pressure of water or absorbent is 0.5 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-33m/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, circulating face accounts for basal area 30--65%, because venturi sprays intercept layer cigarette Gas constriction in flow area, flue gas in the non-constant section Venturi rod gate layer between the space of multilayer non-constant section Venturi rod grid plus Speed passes through, spray in tower and lower cleaning solution and the upstream dust-laden mixed flue gas formation suspension changing of the relative positions for carrying aerosol, gas Liquid turbulent flow is contacted, and flow of flue gas can increase turbulent flow contact between gas, solid, liquid three-phase, fierce inertial collision occurs, condenses and blocks Cut, substantially increase mass transfer, the heating surface between air-liquid two-phase, another aspect mixed flue gas pass through Venturi rod gate layer When, formed strong " gas is surrounded with liquid " and bubbling spray state, improve cleaning system to the capture rate of fine grit and The mass-transfer efficiency of gas purification.Gas-liquid turbulent flow contact strength is greatly increased, and is improved fourth mixing wastewater with air flue gas and is mixed aggregation efficiency.

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 along tower center, arrange up and down by spaced certain distance；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.

The flue gas of removing dust purification in the primary gas-liquid separation and aerosol preregulator area smoke inlet space upwards it is appropriate away from On section, double-current spray gun body is set；The droplet group of liquid or the droplet group of absorbent are uniformly sprayed to the section, makes the region The droplet group of a large amount of and close compared with fine dust particles size water or the droplet group of absorbent are regained, and has been formed higher Mist field density；Through spray spraying layer 7 and subsequent droplet group particle deceleration, cohesion, sedimentation, increase the udst separations such as mist again after contain Dirt vapor stream air water mixes flue gas, and connection flue is imported under blower negative pressure effect；Dust-laden steam stream flue gas is in connection flue Mix cohesion after into downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting entrance be the reverse spray type foam Suspension washer entrance.

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 foam suspension washer, if it is export-oriented that water smoke suspension foam maker, dried layer are provided with reverse spray type foam suspension washer Spiral board；Water smoke suspension foam maker is made up of one group of atomized water spray nozzle and spray gun, and atomized water spray direction is inverse flue gas stream Direction；Atomized water spray nozzle is more than 1.3 meters with reverse spray type foam suspension washer entrance section distance；Cleaning solution is outstanding by water smoke The upward nozzle of floating foam maker spout is inversely sprayed into air-flow from bottom to top, and gas-liquid two-phase is contacted in high speed anti-phase turbulent flow. If water smoke suspension foam maker bottom appropriate location is provided with dried layer and is separated by a certain distance in reverse spray type foam suspension washer Can with it is isometrical or can also waney export-oriented spiral board, gas-liquid two-phase is carried out turbulent flow again by export-oriented spiral board Mixing, separation；The export-oriented spiral board outlet isometrical with reverse spray type foam suspension washer is pneumatic for the combined type that section is amplified Eddy flow dehydrator.Due to higher emissions requirement, the requirement of water smoke suspended lance water source is corresponding to improve.

Flue gas carries out entering described after the cleaning dust more stronger than abovementioned steps is purified through reverse spray type foam suspension washer Combined type air swirl dehydrator smoke inlet, the big dry reverse spray type foam suspension in the combined type air swirl dehydrator section is washed Wash device section；The combined type air swirl dehydrator includes that water fog generator, dehydrator inward turning cylinder, gas-liquid spray gun group feed flow are supplied Gas interface, spray gun group feed flow interface, blowdown inclined clapboard, muddy water floss hole, the ring that intercepts water, combined type air swirl dehydrator outer barrel, Export-oriented spiral board, dehydrator dirt collecting bucket, dehydrator muddy water floss hole, dehydrator inward turning cylinder are cylinder, for adapt to compared with The smoke dust discharge concentration of high request, in the dehydrator inward turning settable water fog generator of cylinder entrance top, flue gas cuts through described Combined type air swirl dehydrator epimere eddy flow, deceleration, gas-liquid separation that face is amplified；Eddy flow flue gas after gas-liquid separation is from described Dehydrator inward turning cylinder entrance enters, and carries the water fog generator nozzle that the dehydrator inward turning cylinder entrance top favorable current is set The air water mist of importing, in dehydrator inward turning cylinder, makes flue gas and water smoke eddy flow, mixes, condenses again, and bulky grain water smoke exists Gravitational settling in the downward space of dehydrator inward turning cylinder outlet, falls into the dehydrator dirt collecting bucket, collects, and from dehydrator collection Dirt bucket lower end dehydrator muddy water floss hole enters muddy water discharge liquid packing, and reverse spray type foam suspension washer separating liquid is by the row Dirty inclined clapboard is collected by muddy water floss hole and enters muddy water discharge liquid packing into circulation with the space that dehydrator outer barrel is surrounded Reuse after water treatment system treatment.

Flue gas is in dehydrator inward turning cylinder exit edge diffusion folding after udst separation in dehydrator inward turning cylinder Return and be upwardly into the eddy flow drying zone, from bottom to top, if flue gas is respectively through flowing the export-oriented dedusting dehydration spiral board depth of dried layer Degree is clean, if again through flowing the export-oriented dehydrating demisting spiral board dehydrating demisting of dried layer, the ring that intercepts water retains the moisture film climbed along wall, The export-oriented dehydrating demisting spiral board upper and lower ends are respectively equipped with two-way gap and rinse water fog spraying gun, and the export-oriented dedusting takes off Water spiral board upper and lower ends are respectively equipped with two-way normally opened water fog spraying gun.

Through above-mentioned steps step by step, crescendo, the dust-laden vapor stream flue gas after the cleaning of multistage dedusting dehydrating demisting is under described Line gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower eddy flow drying zone upper end（Outlet side）Discharge, i.e. blowdown Dou Separator face is tangentially exported or adopted to have with combined type air swirl dehydrator outer barrel and the tangent flue gas of dehydrator inward turning cylinder It is connected with radially outlet and with the exhanst gas outlet pipeline.

Dedusting plaster is concentrated in effluent cycle sedimentation basin, by slurry submerged pump timing extraction, is delivered at drying bed Reason, flue gas warp（Steel）The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning and system：Spraying spray Scrubbing tower void tower velocity of flue gas 4.5 (m/s)；Water smoke in downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower One group of suspension foam maker；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 is primary Plaster collector 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.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 brings into recirculated water pipe network system Abrasion, fouling, burn into block etc. phenomenon.Flue gas after treatment, apparatus of the present invention and system exhanst gas outlet dust content≤ 15mg/Nm³, efficiency of dust collection reaches 98.5%, and Pa≤1600Pa, 54 DEG C of exit gas temperature are damaged in dedusting and purifying device resistance.Compare Usual Wet-type spray scrubbing tower cleaning system liquid-gas ratio reduces 22%.Because processing unit is that integrated level is high, compact in design, dedusting Purifier includes floor space only 125m including blower fan power station, aiutage etc.²Square metre.Air quantity condition is processed in identical Under, capital expenditure expense, equipment investment expense and operating cost are below oneself technology, and liquid-gas ratio can be reduced under equal conditions 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 should High temperature, high humidity, viscosity for industries such as steel, non-ferrous metal, cement building material, electric power, chemical industry is greatly and containing high resistivity dust Flue gas wet down udst separation；It is also applied for flue gas desulfurization and dedusting purification.

More than, the preferred embodiment of patent only of the present invention, but protection scope of the present invention is not limited thereto, and it is any ripe Those skilled in the art are known in the technical scope of present disclosure, pass through-determine the understanding of professional technique and theory, The change or replacement that can be readily occurred in, should all cover in the range of conservation of the invention, thus conservation scope of the invention with The protection domain that claim is defined is defined.

Claims

1. the dedusting of metallurgical slag processing procedure flue gas high-efficiency low energy consumption and device for deep cleaning, it is characterised in that sprayed including spraying Scrubbing tower and downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, bring out on the spraying spray scrubber Mouth is connected with end entrance on downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower by being connected flue, described Spraying spray scrubber bottom side of the wall is provided with smoke-intake pipe road, and the downstriker gas-liquid foam suspension air swirl deep purifying takes off The side wall of water deentrainment tower is provided with smoke pipeline, and the spraying spray scrubber is the wet type multilayer gas-liquid counter current way of contact, institute Downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower is stated for gas-liquid co-current contact mode.

2. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 1 and device for deep cleaning, it is special Levy and be, smoke-intake pipe road top is sequentially provided with the solidifying trapping area of mist, spraying spray and washes from bottom to top in the spraying spray scrubber Area and primary gas-liquid separation and aerosol preregulator area are washed, venturi is provided between the solidifying trapping area of the mist and spraying spray washing area 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 of double-current spray gun body in the solidifying trapping area of the mist 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 spray Drenching layer is made up of spray gun and nozzle, and the nozzle of the spraying spraying layer of top is unidirectional nozzle, and downwards, other sprayings are sprayed in direction The nozzle of layer is bi-directionally or uni-directionally nozzle, and primary gas-liquid separation and gas are provided with the primary gas-liquid separation and aerosol preregulator area Mist preregulator, the primary gas-liquid separation is provided with double-current spray gun body, the primary with the smoke inlet top in aerosol preregulator area Airflow area of section of the airflow area of section more than spraying spraying layer in gas-liquid separation and aerosol preregulator area.

3. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 2 and device for deep cleaning, it is special Levy and be, the bi-directionally or uni-directionally nozzle of other spraying spraying layers can for single unidirectional or two-way water smoke hollow cone nozzle or Person is single unidirectional or two-way water smoke solid nozzle, and nozzle is along the spraying upper and lower arranged for interval in spray scrubber center, described other sprays The bi-directionally or uni-directionally nozzle of spray painting drenching layer can be several unidirectional or two-way hydraulic spray nozzles, and the nozzle of adjacent spraying spraying layer is put down Face projection is staggered in alternate.

4. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 2 and device for deep cleaning, it is special Levy and be, venturi injection intercept layer is made up of two-layer or two-layer above non-constant section Venturi rod gate layer, it is described non-etc. Section Venturi rod gate layer is spaced substantially equidistant is constituted at grade by some solid poles or some hollow circular-tubes, adjacent non- The rod grid section cloth column direction of uiform section Venturi rod gate layer is identical and is staggered in alternate, every layer of non-constant section Venturi rod The rod grid cross sectional shape of gate layer is identical and cloth column direction is identical, the rod grid section of the non-constant section Venturi rod gate layer at most one layer of bottom Area is less than its adjacent last layer rod grid area of section.

5. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 1 and device for deep cleaning, it is special Levy and be, the lower end of the spraying spray scrubber is provided with spraying spray scrubber dirt collecting bucket, the spraying spray scrubber collection The lower end of dirt bucket is connected with shallow-layer formula primary plaster collector by blow-off line, and the shallow-layer formula primary plaster collector includes Inversed taper platform build muddy water shallow layer tank, Shaftless screw conveyor and dirt mud cut out pipeline, under the inversed taper platform build muddy water shallow layer tank End is connected with the input of Shaftless screw conveyor, and the dirt mud cuts out the upper end of pipeline and the output end of Shaftless screw conveyor 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 processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 1 and device for deep cleaning, it is special Levy and be, the downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower includes what is be sequentially connected from top to bottom Reverse spray type foam suspension washer, combined type air swirl dehydrator and dehydrator dirt collecting bucket, the reverse spray type foam suspension are washed Wash the smoke inlet end of device and be connected flue connection, water smoke is sequentially provided with from top to bottom in the reverse spray type foam suspension washer If suspension foam maker and the export-oriented spiral board of dried layer, the water smoke suspension foam maker is by one group of water fog spraying gun and water smoke Nozzle is constituted, and hydraulic spray nozzle injection direction is inverse airflow direction, and upwards, the combined type air swirl dehydrator includes de- in direction Hydrophone outer barrel, dehydrator inward turning cylinder and inclined clapboard, the dehydrator inward turning cylinder is located in dehydrator outer barrel and axis is consistent, described Inclined clapboard is located at dehydrator outer barrel upper end, and the dehydrator inward turning cylinder is through inclined clapboard and the upper end entrance of dehydrator inward turning cylinder Higher than inclined clapboard plate face, the dehydrator inward turning cylinder upper end porch favorable current is provided with water fog generator, outside the dehydrator The annular space that cylinder is surrounded with dehydrator inward turning drum outer wall below inclined clapboard is eddy flow drying zone, under the dehydrator inward turning cylinder Bring out in the eddy flow drying zone that mouth is turned back upward, if being sequentially provided with dried layer export-oriented dedusting dehydration spiral board, some from bottom to top The export-oriented dehydrating demisting spiral board of layer, intercept water ring, and the side wall of the dehydrator outer barrel intercepted water between ring and inclined clapboard is provided with Tangential outlet, the smoke pipeline is connected with tangential outlet, and the export-oriented dedusting dehydration spiral board upper and lower ends are respectively equipped with Two-way normally opened water fog spraying gun, the export-oriented dehydrating demisting spiral board upper and lower ends are respectively equipped with two-way gap flushing water spray painting Rifle.

7. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 6 and device for deep cleaning, it is special Levy and be, the hydraulic spray nozzle is more than 1.3 meters with reverse spray type foam suspension washer entrance section distance, and the ring that intercepts water is circle Annular, the ring that intercepts water is along dehydrator outer tube inner wall circumference.

8. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 6 and device for deep cleaning, it is special Levy and be, the combined type air swirl dehydrator area of section is more than reverse spray type foam suspension washer area of section, described The lower end of dehydrator dirt collecting bucket is provided with dehydrator muddy water floss hole, is set on the dehydrator outer tube side wall above the inclined clapboard lower end There is muddy water floss hole.

9. metallurgical slag processing procedure flue gas high-efficiency low energy consumption dedusting according to claim 1 and device for deep cleaning, it is special Levy and be, the smoke-intake pipe road is horizontal by 12-16 °, and the Way in smoke-intake pipe road is downward.