CN206454434U - The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning - Google Patents

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

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Publication number
CN206454434U
CN206454434U CN201621487025.XU CN201621487025U CN206454434U CN 206454434 U CN206454434 U CN 206454434U CN 201621487025 U CN201621487025 U CN 201621487025U CN 206454434 U CN206454434 U CN 206454434U
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spraying
spray
gas
dehydrator
layer
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段同意
陈振华
褚善庆
李嵩
刘帅
冯双红
管序荣
孔德明
胡可庆
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Jiangsu Boji Environment Engineering Co Ltd
Shanghai Baosteel Energy Service Co Ltd
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Jiangsu Boji Environment Engineering Co Ltd
Shanghai Baosteel Energy Service Co Ltd
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Abstract

The utility model is related 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 utility model 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, it is stably reached ultralow smoke dust discharge concentration 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 utility model is related to the dust arrester of prevention and control of air pollution, more particularly to metallurgical slag processing procedure flue gas is efficiently low Energy consumption dedusting and device for deep cleaning, belong to flue-gas dust-removing and desulfurization purifier technical field, can be used for flue gas coal gas Purify 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, it is inevitable that steam carries under one's arms the diffusion of slag micronic dust, its main component be metal oxide particle, Vapor, is polluted to regional environment.
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 50mg/Nm3 discharge index, 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, property is coagulated with the hydraulicity and 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:It is less than 10 μ 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 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 usual Wet-type spray purifying column due to Dirt technique is caught using common spray washing, for the classification efficiency of 0--5 μm of fine particle is only 60%-72% to particle diameter, 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 without the separation of reliable aqueous vapor, form cloud and carry under one's arms, lead to Aiutage diffusion is crossed, causes a wide range of pellet exceeded.
The Wet-type spray scrubbing tower of new generation generally improved, at the higher slag of percentage by volume shared by suction particulate matter Manage under the dust-laden steam stream exhaust gas dust size distribution produced, 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 using 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.
Plaster fully enters circular water treating system in usual Wet-type spray scrubbing tower, 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 generally improved 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 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 transition washing using transition washing, liquid-gas ratio Height, quantity of circulating water is more, and purifier and system dampness are high, increase 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 modern economic construction, the basic industry of 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.Strengthen respirable dust, particularly fine particle(PM2.5)Improvement.Atmosphere pollution is especially arranged Put limit value requirement further strict,
The need for meeting industrial enterprise's pollution control, property is coagulated especially for high temperature, high humidity and the hydraulicity and glue (knot) Strong to wait flue gas characteristic, the flue gas high-efficiency low energy consumption dedusting of exploitation higher performance and device for deep cleaning and system subtract as pollution The urgent task of row.
Utility model content
For drawbacks described above, the purpose of this utility model is that offer can adapt to high temperature, high humidity, high viscosity flue gas characteristic The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning, it is stably reached under the conditions of low energy consumption super Low smoke dust discharge concentration, the metallurgical slag processing procedure flue gas for meeting stricter environmental pollution improvement emission request is efficiently low Energy consumption dedusting and device for deep cleaning.
The technical scheme used for this utility model is:
It is described including spraying spray scrubber and downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower Spraying spray scrubber upper end outlet and end entrance on downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower Connected by connecting flue, the spraying spray scrubber bottom side of the wall is provided with smoke-intake pipe road, the downstriker gas-liquid foam The side wall of suspension air swirl deep purifying dehydrating demisting tower is provided with smoke pipeline, and the spraying spray scrubber is that wet type is more The layer gas-liquid counter current way of contact, the downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower is gas-liquid following current The way of contact.
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 Sprayed between spraying spray washing area in intercept layer, the solidifying trapping area of the mist provided with one group of double fluid spray gun body provided with venturi 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 Provided with primary gas-liquid separation and aerosol preregulator in preregulator area, the primary gas-liquid separation and the flue gas in aerosol preregulator area enter Provided with double-current spray gun body above mouthful, the primary gas-liquid separation is more than with the airflow area of section in aerosol preregulator area sprays The airflow area of section of spray painting drenching layer.
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 edge spraying spray washing Arranged for interval above and below 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.
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 collected Device, the primary plaster collector 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 deep purifying takes off Water deentrainment tower includes reverse spray type foam suspension washer, combined type air swirl dehydrator and the dehydration being sequentially connected from top to bottom Device dirt collecting bucket, the smoke inlet end of the reverse spray type foam suspension washer hangs with being connected flue connection, the reverse spray type foam 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 In the eddy flow drying zone for turning back upward for eddy flow drying zone, the dehydrator inward turning cylinder lower end outlet, it 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 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 above and below two-way normally opened water fog spraying gun, the export-oriented dehydrating demisting spiral board End is respectively equipped with two-way gap and rinses water fog spraying gun.
As the further improvement of above-mentioned technical proposal, the hydraulic spray nozzle is cut with reverse spray type foam suspension washer entrance Identity distance is from more than 1.3 meters, and the ring that intercepts water is annular, and the ring that intercepts water is along dehydrator outer tube inner wall circumference.
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.
The utility model has the advantages that:
1st, it is less than in the dust-laden steam stream flue gas that the utility model is produced to the dust separation efficiency high of flue gas, slag processing 10 μm of dust sizes account for percentage by volume about 32-44%, even if the low energy Wet-type spray purifying column of generally optimization design is used for Gas cleaning dedusting, due to using common wet dust removal structure, its to classification efficiency that particle diameter is 0--5 μm of fine particle only For 60%-72%, the classification efficiency to 5-10 μm of respirable dusts is only 80%-90%, to volume basis shared by suction particulate matter The total efficiency of dust collection of dust-laden steam stream flue gas that the higher slag processing of number is produced can be less than 90%, it is impossible to stably reach atmosphere pollution The special emission limit requirement of thing, will reach stricter emission request, realize the energy of wet flue gas spray-absorption purifier Effect upgrading, improve its to particle diameter be less than 10um particulate matters classification efficiency turn into key problem in technology.The utility model is respectively adopted The solidifying trapping of mist, the speed-raising injection of non-constant section Venturi rod grid combination layer form froth bed, spraying spray washing and primary gas-liquid point It is presetting from aerosol, then through downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting, it is outstanding using reverse spray type foam Floating washer is combined through series connection with combined type air swirl dehydrator, step by step, crescendo, the clean technology of multistage dedusting dehydrating demisting, Effectively facilitate and accelerate gas-solid-liquid three phase dynamic efficiently mix, condense, aqueous vapor separation, improve system and device to fine particle Grade dust-collection efficiency and gas dust separation efficiency.Branch art, total dedusting are purified compared to the modern flue gas wet dust removal generally improved Purification efficiency improves 13%, smoke dust discharge concentration can reach≤15mg/Nm3
2nd, the utility model low energy consumption operation characteristic is notable.The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and depth Compare under purifier and system, identical outlet drain concentration, compared to the modern flue gas wet dust removal purifier generally improved And system always hinders and damages low by 20%;Due to coagulating in section and primary gas-liquid separation and aerosol preregulator area provided with double fluid spray gun body in mist or Thin liquid mist spray gun, improves non-constant section Venturi rod grid combination layer, spraying spray washing area and the washing of reverse spray type foam suspension Device apparatus and system is to the dedusting classification efficiency of fine particle, so as to can change generally in the section to improve in spray washing section System traps the ability of fine particle, the way for reaching higher dust separation efficiency and using big liquid-gas ratio transition to wash, Lower liquid-gas ratio is issued to higher dust separation efficiency, reduces the internal circulating load of circulation fluid.So as to reduce wet purification Total power consumption of system.Being used for liquid-gas ratio under dedusting, equal conditions compared to usual Wet-type spray scrubbing tower cleaning system can be reduced 24%, it just can reach preferable efficiency of dust collection.Due to the reduction of internal circulating load, exhaust gas volumn is constant, and liquid-gas ratio is reduced, and purifier and is System dampness is accordingly reduced, and also just reduces fan energy consumption.Compared with usual Wet-type spray scrubbing tower, the constant feelings of total spray liquid measure Under condition, and due to reducing the liquid-gas ratio of spray washing layer, then total power consumption of detergent circulator can reduce, and scrubber layer is drenched by spraying Spray liquid measure accounts for 80% meter of total amount of liquor, then power consumption declines 4%;Rearmounted downstriker gas-liquid foam suspension air swirl depth is net Change dehydrating demisting tower, combined using reverse spray type foam suspension washer with combined type air swirl dehydrator, reverse spray type foam hangs Gas-liquid two-phase is contacted in high speed anti-phase turbulent flow in floating washer, not only make use of gas phase energy, and be effectively utilized liquid phase energy Amount, highlights 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, the utility model circular water treating system floor space is small, and comprehensive circular water treating system operating cost is low.Before Spraying spray scrubber is put, primary dust removing purification efficiency is more than bulky grain dirt mud in 95%, outer spoil disposal water and occupies larger specific gravity.By In setting the primary plaster collector outlet of the signified shallow-layer formula of this patent to receive to obtain plastic state plaster in its tower bottom, it is easy to convey, transports With later stage disposal;So that the suspension mass concentration into circular water treating system is greatly lowered, removed with usual flue gas wet type The circular water treating system of dirt cleaning system is compared, and circular water treating system floor space reduces 1/3, comprehensive water treatment system fortune Row expense reduces 40%, and sludge volume reduces more than 40%, and dirt mud processing cost reduces 30%, while mitigating significantly because of high suspended matter Mass concentration muddy water enters the phenomenons such as abrasion, fouling, burn into blocking that recirculated water pipe network system is brought.
4th, the utility model anti-stick, scale-preventing performance are stable, prominent;It is dehydrated Strong dehumidifying ability.It is more suitable for slag processing The purification process of the dust-laden steam stream flue gas characteristic of generation.The dust-laden steam stream smoke moisture that slag processing is produced is big, water capacity Up to:13%--24%, the dust carried under one's arms is the superfine powder of slag, with the hydraulicity and adhesion, in cleaning equipment easily There is fouling, flow resistance increase.High dust content and low dust content, coarseparticulate are removed and gone with fine particle by the utility model Except purification be placed in double tower complete.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 is contacted, and flow of flue gas can increase, and makes high dust-laden not without other components in addition to non-constant section Venturi rod grid group in tower Concentration range has stronger anti-stick, scale-preventing performance;Rearmounted downstriker gas-liquid foam suspension air swirl deep purifying takes off Water deentrainment tower, reverse spray type foam suspension washer is combined with combined type air swirl dehydrator, gas-liquid counter current contact, turbulent flow contact Intensity is strong;Air swirl, gas-liquid mixed agglomeration separation effectively improves the particle diameter width for removing spray film drop, makes low dust content Region possesses the clearance that superpower fine particle removes purifying rate and free water, and discharge fume droplet content≤75mg/Nm3
5th, all spray guns of the utility model device are provided with floor installation on outer tower wall, and one is equipped with single spray gun barral of a gun Individual or several nozzles, operating personnel can implement overall maintenance to spray gun outside tower and change or dismount.Realization does not shut down dismounting online Maintenance, enters without personnel and maintenance is dismounted in tower, improves the working condition of operation maintainer, swift to operate, safe and reliable.
6th, the utility model is due to the integrated equipment of processing unit, and compact in design, floor space compares usual spray column It is small.Due to using reducing tower, spraying spray section superficial linear velocity in a column is higher, and tower diameter is smaller, because primary gas-liquid separation and aerosol are pre- Tiao Qi areas section amplification, refined dedusting is arranged in downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, by Used in system by the thick clean skill for gradually becoming strong, multistage dedusting dehydrating demisting to smart dust separation step by step, dust separation intensity Art, double tower concatenation, under the conditions of identical processing air quantity, capital cost, equipment investment expense is below oneself technology.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
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.
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.
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 Trap provided with venturi injection intercept layer 6 between 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 from bottom to top provided with dried layer spraying spraying layer 9 in area II, 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, The primary gas-liquid separation is with being provided with primary gas-liquid separation and aerosol preregulator 10, the primary gas-liquid in aerosol preregulator area III Separation is with being provided with double-current spray gun body 7 above the smoke inlet in aerosol preregulator area III, the primary gas-liquid separation and aerosol are presetting Airflow area of section in device area III is more than the airflow area of section of spraying spraying layer 9.
As the further improvement of above-mentioned technical proposal, the bi-directionally or uni-directionally nozzles of other spraying spraying layers 9 can be with For 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 Arranged for interval above and below 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.
As the further improvement of above-mentioned technical proposal, the venturi injection intercept layer 6 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 1 is washed provided with spraying spray 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 primary plaster collector of the shallow-layer formula 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 and the input of Shaftless screw conveyor 14 connect 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 separation.
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 reverse spray type foam suspension washer 17, the combined type air swirl dehydrator 18 being 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 is connected with being connected flue 3, described inverse If being sequentially provided with water smoke suspension foam maker 20 and the export-oriented eddy flow of dried layer from top to bottom in spray formula foam suspension washer 17 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 end entrance on inclined clapboard 24 and dehydrator inward turning cylinder 23 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 outlet of 23 lower ends 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 plate 26, the export-oriented dehydrating demisting spiral board 27 of 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 connected provided with tangential outlet, the smoke pipeline 5 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 Water fog spraying gun is rinsed provided with two-way gap.
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 the ring 28 that intercepts water is annular, and the ring 28 that intercepts water is along the inwall circumference cloth of dehydrator outer barrel 22 Put.
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 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 with Line gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2, the spraying upper end outlet of spray scrubber 1 and downstriker gas End entrance is connected by connecting flue 3 on liquid 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, and the downstriker gas-liquid foam suspension is pneumatic Eddy flow 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 and washed from bottom to top in spraying spray scrubber 1 Wash area II and primary gas-liquid separation and aerosol preregulator area III;
Downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower 2 is inverse including what is be sequentially connected from top to bottom Spray formula foam suspension washer 17, combined type air swirl dehydrator 18 and dehydrator dirt collecting bucket 19;
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 plane 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 to appropriate section between non-constant section Venturi rod gate layer 3 It is upper that in inverse air-flow, the double-current spray gun body of one group of gas 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 higher mist field density.By This, form dynamic effectively cohesion, interception includes the work(of fine particle and respirable dust as the droplet group of core using 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 passes through strike several times, produces very tiny particle.Nozzle is normal During work, 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, carrying is largely sprayed by two-fluid Non-constant section Venturi rod grid of the mixed flue gas of the spray particle group of rifle or the newly-increased injection of thin liquid mist spray gun upwardly through setting Layer,
Due to venturi spray intercept layer flue gas constriction in flow area, flue gas in non-constant section Venturi rod gate layer at least Accelerate to pass through between the space of two layers or multilayer non-constant section Venturi rod grid, spray in tower and under cleaning solution with sailing against the current Carrying aerosol the formation suspension changing of the relative positions of dust-laden mixed flue gas, the contact of gas-liquid turbulent flow, flow of flue gas can increase gas, solid, liquid three-phase Between turbulent flow contact, occur fierce inertial collision, cohesion and intercept, substantially increase the mass transfer between air-liquid two-phase, pass Hot surface, when another aspect mixed flue gas is by Venturi rod gate layer, forms strong " gas is surrounded with liquid " bubbling spray State is penetrated, cleaning system is improved to the capture rate of fine grit and the mass-transfer efficiency of gas purification.Circulating face accounts for basal area 30-- 65%.Non-constant section Venturi rod grid cross sectional shape, the cloth column direction of the non-constant section Venturi rod grid combination are identical;Every layer Venturi rod grid are spaced substantially equidistant are constituted at grade by some solid poles or some hollow circular-tubes;It is non-using multilayer Spaced certain distance is set above and below uiform section Venturi rod grid, and adjacent two layers plane projection is in spaced, most one layer of bottom The Venturi rod section of non-constant section Venturi rod grid is less than its adjacent last layer Venturi rod section, so that mixing wastewater with air flue gas The tangential space imported between larger cross-section Venturi rod on the downside of the larger cross-section Venturi rod, when mixing wastewater with air flue gas by compared with When space accelerates between the Venturi rod grid of heavy in section, so that the bubbling for forming stronger " surrounding gas with liquid " sprays State, greatly increases gas-liquid turbulent flow contact strength, improves mixing wastewater with air flue gas and mixes 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 from bottom to top provided with individual layer or dried layer spraying spraying layer in scrubbing section.
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, circulates because the primary gas-water separation and aerosol preregulator flue gas flow cross-section areas are more than the spraying spraying layer flue gas 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 using suspended particulate Slow down delay, 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 When the double-current spray gun body of setting on section;The droplet group of liquid or the droplet group of absorbent are uniformly sprayed to the section, makes this Region has regained the droplet group of a large amount of and close compared with fine dust particles size water or the droplet group of absorbent, and formed compared with High mist field density;Through spray spraying layer and subsequent droplet group particle deceleration, cohesion, sedimentation, increase the dust separations such as mist again after Dust-laden steam flowing water mix flue gas, blower negative pressure effect under import connection flue;Dust-laden steam stream flue gas is in connection flue It is interior mix cohesion after into downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower entrance be the reverse spray type Foam 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 higher water smoke field density 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 the liquid film foam area of a 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 If in suspension washer water smoke suspension foam maker bottom appropriate location provided with dried layer be 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, separation;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 enters described after the cleaning dust purification more stronger than abovementioned steps is carried out 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 water fog generator, dehydrator inward turning cylinder, gas-liquid spray gun group feed flow and 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, water fog generator is can be set in dehydrator inward turning cylinder entrance top, and flue gas is cut through described The combined type air swirl dehydrator epimere eddy flow of face amplification, deceleration, gas-liquid separation;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, bulky grain water smoke exists again Gravitational settling in the downward space in 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 is discharged into muddy water discharge liquid packing, and reverse spray type foam suspension washer separating liquid is by the row Dirty inclined clapboard, which is collected with the space that dehydrator outer barrel is surrounded and is discharged into muddy water by muddy water floss hole, discharges liquid packing into circulation Reuse after water treatment system processing.
Flue gas is in dehydrator inward turning cylinder exit edge diffusion folding after dust 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, multistage dedusting dehydrating demisting it is clean after dust-laden vapor stream flue gas 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 is oblique Separator face is tangentially exported or adopted with combined type air swirl dehydrator outer barrel and the tangent flue gas of dehydrator inward turning cylinder to have It is connected with radially outlet and with the exhanst gas outlet pipeline.
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 collector of shallow-layer formula is stated, the primary plaster collector of the shallow-layer formula 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, sideways provided with the muddy water row after first separation Put mouth.Outer spoil disposal water is discharged into the primary plaster collector of shallow-layer formula 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, which gradually elapses through Shaftless spiral blade and squeezes filter to dirt mud, cuts out pipeline discharge, is led to herein The dirt mud that normal moisture content is about 65% ~ 75%, the waste water after primary mud-water separation is 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 is discharged into circular water treating system, further completes cold in precipitation pond 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 discharged into 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, 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 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
Handle 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 Slag treatment device draw dust-laden steam stream flue gas, from gas approach pipeline 1 with Plane is in oblique spraying spray scrubber under 15 ° 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 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 passes through strike several times, produces very tiny particle.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 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, circulating face accounts for basal area 30--65%, because venturi sprays intercept layer cigarette Gas constriction in flow area, flue gas adds in non-constant section Venturi rod gate layer between the space of multilayer non-constant section Venturi rod grid Speed passes through, and the dust-laden mixed flue gas of spray in tower and lower cleaning solution and upstream carrying aerosol forms the suspension changing of the relative positions, gas Liquid turbulent flow is contacted, and flow of flue gas can increase turbulent flow between gas, solid, liquid three-phase and contact, and occur fierce inertial collision, condense and block Cut, substantially increase mass transfer, the heating surface between air-liquid two-phase, another aspect mixed flue gas passes through Venturi rod gate layer When, form 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.
Dust-laden steam stream flue gas is upwardly into spraying spray washing area, spraying spray by non-constant section Venturi rod gate layer If from bottom to top provided with individual layer or dried layer spraying spraying layer in scrubbing section.
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.
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, circulates because the primary gas-water separation and aerosol preregulator flue gas flow cross-section areas are more than the spraying spraying layer flue gas 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 using suspended particulate Slow down delay, 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 When 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 this Region has regained the droplet group of a large amount of and close compared with fine dust particles size water or the droplet group of absorbent, and formed compared with High mist field density;Through spray spraying layer 7 and subsequent droplet group particle deceleration, cohesion, sedimentation, increase the dust separations such as mist again after Dust-laden vapor stream air water mix flue gas, blower negative pressure effect under import connection flue;Dust-laden steam stream flue gas is in connection cigarette In road 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.
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 higher water smoke field density 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 separated by a certain distance provided with dried layer in reverse spray type foam suspension washer Can with it is isometrical or can also waney export-oriented spiral board, make gas-liquid two-phase again by export-oriented spiral board carry out turbulent flow Mixing, separation;Isometrical export-oriented spiral board outlet is pneumatic for the combined type that section is amplified with reverse spray type foam suspension washer Eddy flow dehydrator.Due to higher emissions requirement, the requirement of water smoke suspended lance water source is corresponding to improve.
Flue gas enters described after the cleaning dust purification more stronger than abovementioned steps is carried out 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 water fog generator, dehydrator inward turning cylinder, gas-liquid spray gun group feed flow and 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, water fog generator is can be set in dehydrator inward turning cylinder entrance top, and flue gas is cut through described The combined type air swirl dehydrator epimere eddy flow of face amplification, deceleration, gas-liquid separation;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, bulky grain water smoke exists again Gravitational settling in the downward space in 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 is discharged into muddy water discharge liquid packing, and reverse spray type foam suspension washer separating liquid is by the row Dirty inclined clapboard, which is collected with the space that dehydrator outer barrel is surrounded and is discharged into muddy water by muddy water floss hole, discharges liquid packing into circulation Reuse after water treatment system processing.
Flue gas is in dehydrator inward turning cylinder exit edge diffusion folding after dust separation in dehydrator inward turning cylinder Return and be upwardly into the eddy flow drying zone, from bottom to top, if flue gas is dehydrated spiral board depth through flowing the export-oriented dedusting of dried layer respectively 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, multistage dedusting dehydrating demisting it is clean after dust-laden vapor stream flue gas 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 with combined type air swirl dehydrator outer barrel and the tangent flue gas of dehydrator inward turning cylinder to have It is connected with radially outlet and with the exhanst gas outlet pipeline.
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 collector of shallow-layer formula is stated, the primary plaster collector of the shallow-layer formula 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, sideways provided with the muddy water row after first separation Put mouth.Outer spoil disposal water is discharged into the primary plaster collector of shallow-layer formula 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, which gradually elapses through Shaftless spiral blade and squeezes filter to dirt mud, cuts out pipeline discharge, is led to herein The dirt mud that normal moisture content is about 65% ~ 75%, the waste water after primary mud-water separation is 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 is discharged into circular water treating system, further completes cold in precipitation pond 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 discharged into 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, 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;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 collector 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.Flue gas is after processing, the utility model apparatus 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.Phase 22% is reduced than usual Wet-type spray scrubbing tower cleaning system liquid-gas ratio.Because processing unit is that integrated level is high, compact in design is removed Dirt purifier includes blower fan power station, aiutage etc. in interior floor space only 125m2Square metre.Air quantity bar is handled in identical Under part, capital expenditure expense, equipment investment expense and operating cost, which are below oneself, has liquid-gas ratio under technology, equal conditions to reduce 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 dust separation;It is also applied for flue gas desulfurization and dedusting purification.
More than, it is only the preferred embodiment of patent of the present invention, but protection domain of the present utility model is not limited thereto, times What those familiar with the art passes through-determined professional technique and theory in the technical scope that the utility model is disclosed Understanding, the change or replacement that can be readily occurred in should all cover in the range of conservation of the present utility model, therefore this practicality is new The conservation scope of type is defined by the protection domain that claim is defined.

Claims (9)

1. the flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning, it is characterised in that including spraying spray Brought out on scrubbing tower and downstriker gas-liquid foam suspension air swirl deep purifying dehydrating demisting tower, 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 Spray scrubber bottom side of the wall of spraying 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, being sequentially provided with the solidifying trapping area of mist, spraying spray from bottom to top above smoke-intake pipe road in the spraying spray scrubber washes 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 Spray 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 of double-current spray gun body Combined with thin liquid mist spray gun, if from bottom to top provided with dried layer spraying spraying layer, the spraying spray in the spraying spray washing area 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 the primary gas-liquid separation is with being provided with primary gas-liquid separation and gas in aerosol preregulator area Mist preregulator, the primary gas-liquid separation is with being provided with double-current spray gun body, the primary above the smoke inlet in aerosol preregulator area Gas-liquid separation is more than the airflow area of section of spraying spraying layer with the airflow area of section in 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 nozzles 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 arranged for interval above and below spraying spray scrubber center, other described 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 layers or more than two layers 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 the primary plaster collector of shallow-layer formula by blow-off line, and the primary plaster collector of the shallow-layer formula includes Inversed taper platform build muddy water shallow layer tank, Shaftless screw conveyor and dirt mud are cut out under pipeline, 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 separation.
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 sequentially provided with water smoke from top to bottom with being connected in flue connection, 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 outside water fog generator, the dehydrator Cylinder is eddy flow drying zone with the annular space that dehydrator inward turning drum outer wall is surrounded below inclined clapboard, 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 from bottom to top, some The export-oriented dehydrating demisting spiral board of layer, intercepted 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 the dehydrator outer tube side wall above dehydrator muddy water floss hole, the inclined clapboard lower end and set 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.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731403A (en) * 2016-12-31 2017-05-31 上海宝钢节能环保技术有限公司 The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731403A (en) * 2016-12-31 2017-05-31 上海宝钢节能环保技术有限公司 The flue gas high-efficiency low energy consumption dedusting of metallurgical slag processing procedure and device for deep cleaning

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