CN203469721U - Wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas - Google Patents
Wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas Download PDFInfo
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- CN203469721U CN203469721U CN201320505232.3U CN201320505232U CN203469721U CN 203469721 U CN203469721 U CN 203469721U CN 201320505232 U CN201320505232 U CN 201320505232U CN 203469721 U CN203469721 U CN 203469721U
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Abstract
The utility model relates to a wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas. The wet type high-efficiency dehumidifying and dust-removing device comprises a washing tower and a descending flue, wherein the upper end of the washing tower is connected with the upper end of the descending flue to form a channel; the lower end of the washing tower is provided with a smoke inlet pipeline; the lower end of the descending flue is provided with a smoke outlet pipeline; a mist condensing-catching area, a spraying-washing area and a dewatering-dehumidifying-demisting area are arranged above the smoke inlet pipe in the washing tower in sequence from bottom to top; a jetting and intercepting layer is arranged between the mist condensing-catching area and the spraying-washing area; a planar grating is arranged between the jetting and intercepting layer and the dewatering-dehumidifying-demisting area; the dewatering-dehumidifying-demisting area is internally provided with a first-stage enhanced type rotational-flow plate re-blocking dewatering-dehumidifying demister; a group of fine liquid mist spraying guns is arranged below the first-stage enhanced type rotational-flow plate re-blocking dewatering-dehumidifying demister; and the descending flue is internally provided with a second-stage enhanced type rotational-flow plate re-blocking dewatering-dehumidifying demister. The wet type high-efficiency dehumidifying and dust-removing device has the advantages that the layout is compact, the occupied area is small, the dehumidifying and dust-removing efficiency of the dusty steam-flow smoke gas is high and the energy consumption can be saved.
Description
Technical field
The utility model relates to a kind of dust arrester, relates in particular to a kind of dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester for prevention and control of air pollution, belongs to flue-gas dust-removing and desulfurization purifier technical field, also can be for the cooling wet down system of coal gas.
Background technology
Steel and iron industry is the basic industry of modern economic construction, modern national defense, is also resource, major power consumer, produces in process of production a large amount of byproducts and pollutant simultaneously, and energy-saving and emission-reduction task is urgent and heavy.Aspect Air Pollution Control, on February 27th, 2013, country determines that the industries such as iron and steel, cement all will start to carry out the special emission limit of atmosphere pollution in the different periods.The improvement of strengthening respirable dust, particularly airborne fine particulate matter (PM2.5).Dust-laden vapor stream flue gas is the more disposal of pollutants flue gas of iron and steel metallurgical industry, slag processing and utilization is that dust-laden vapor stream flue gas typically produces source, in slag processing procedure, high-temperature slag will produce a large amount of superheated steams when by quick shrend, and the steam airborne dust diffusion of carrying under one's arms is inevitable.Its main component is metal oxide particle, steam, and regional environment is polluted.
Conventionally, cloth bag, sintered plate and electric cleaner are all the high-effective dust-removing technology of current mature and reliable, be applied to the dust-laden vapor stream flue-gas dust removal and purification that slag processing procedure produces, can reach the discharge index of 50mg/Nm3, but shortcoming is also obvious: not only investment and operating cost is high, take up an area greatly, and the cycle in when construction is long, the most important is that this tail gas water capacity is up to 13～24%, the dust of carrying under one's arms is the superfine powder of slag, character and concrete are similar, there is the solidifying property of the hydraulicity and glue (knot), on cloth bag or sintered plate, may easily harden, cause deashing difficulty.
According to this type of engineering practice in the past with detect data: be less than 10 μ m dust sizes in the dust-laden vapor stream flue gas that slag processing produces and account for percentage by volume and be about 32-44%.The shared percentage by volume of pellet is higher, and trapping difficulty is large, simultaneously in slag treating apparatus operation process, because the slag of slag (form, temperature) differs, so the fluctuation of tail gas dust concentration, exhaust gas volumn is larger.
Wet dust removal scheme, technique is simple, investment and operating cost low, easily implement, can reach maximizing the benefits object.Even if but the low energy Wet-type spray purifying column of optimal design is used for gas cleaning dedusting conventionally, owing to adopting common wet dust removal structure, its classification efficiency that is 0--5 μ m fine particle to particle diameter is only 60%-72%, to the classification efficiency of 5-10 μ m respirable dusts, be only 80%-90%, can be lower than 90% to sucking the total efficiency of dust collection of dust-laden vapor stream flue gas of the slag processing generation that the shared percentage by volume of particle is higher.Can not stablize and reach the special emission limit requirement of atmosphere pollution.
In recent years, more iron and steel enterprise adopts flue spray-on process to process the dust-laden vapor stream flue gas that slag processing process produces, but smoke catching weak effect, again without aqueous vapor is separated reliably, formation cloud is carried under one's arms, and by aiutage, spreads, and causes pellet on a large scale to exceed standard.Simultaneously, because flue spray for dust suppression method principle is to utilize the density of inner flue gas of the stove and atmospheric density poor, by aiutage, produces draft, while making the interior mobile dust-laden vapor stream flue gas of flue by spray washing district, obtain washing and wet down is lowered the temperature.But a little less than grit and the inertial collision between drop, interception and cohesion in dust-laden vapor stream flue gas.And because flue-gas temperature in aiutage is low, moisture content is high, dampness increases, and hot lifting draft weakens, and trapping weak effect appears the front a large amount of cigarettes that overflow of slag treatment facility, in smoke evacuation ability.New [[the national prevention and control of air pollution action plan [planning]]] formulated of country is about to implement, and the tighter requirement that the special emission limit of atmosphere pollution requires, makes steel and iron industry face environmental protection ' " end-of-term examination ".For controlling the operations such as golden slag processing, provide the wet dust removal gas purification techniques of the flue gas characteristics such as more high performance applicable dust-laden vapor stream to equip the urgent task that has become pollution emission reduction.
Utility model content
For above-mentioned defect, the purpose of this utility model is to provide a kind of dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester that can improve dust-laden vapor stream flue gas wet down efficiency of dust collection.
The technical scheme that the utility model adopts is for this reason: comprise scrubbing tower and down pass, described scrubbing tower upper end and down pass upper end are connected to form passage, described scrubbing tower lower end is provided with smoke-intake pipe road, described down pass lower end is provided with smoke pipeline, in scrubbing tower, top, smoke-intake pipe road is provided with the solidifying trapping of mist district from bottom to top successively, spray washing district and dehydration wet down are except fog-zone, between mist solidifying trapping district and spray washing district, be provided with injection intercept layer, spray washing district and dehydration wet down are provided with planar grille except between fog-zone, in down pass, be provided with two stage enhancement type spiral boards and keep off again dehydration wet down demister.
Described injection intercept layer is comprised of single or multiple lift rod grid layer, the excellent grid cross section cloth column direction of the adjacent rod grid layer of single or multiple lift rod grid layer is identical and be alternate and be staggered, the excellent grid cross sectional shape of every layer of excellent grid layer is identical, cloth column direction is identical, rod grid spacing is equal, and described excellent grid are to be rearranged by solid pole or hollow circular-tube.
The solidifying trapping of described injection intercept layer and mist is provided with one group of two-fluid spray gun and one group thin liquid spray painting rifle between district, described two-fluid spray gun is positioned at thin liquid spray painting rifle top and is downstream direction to be arranged, described thin liquid spray painting rifle is contrary air-flow and arranges and be alternate with two-fluid spray gun and be staggered.
In described spray washing district, be provided with the above spraying layer of three floor or three floor from bottom to top, described spraying layer is comprised of cleaning solution distribution endless tube, spray gun and the nozzle with connecting branch, the nozzle of the spraying layer of top layer is unidirectional nozzle, direction is downward, the nozzle of other spraying layers is two-way or single-direction and dual-direction mixing nozzle, and the nozzle of adjacent spraying layer is alternate and is staggered.
Described dehydration wet down is kept off dehydration wet down demister again except being provided with first order enhancement mode spiral board in fog-zone, described first order enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board and the multiple baffle group of streamlined concentric circles, the multiple baffle group of streamlined concentric circles is arranged on export-oriented spiral board top, before export-oriented spiral board, be provided with one group thin liquid spray painting rifle, described thin liquid spray painting rifle direction upwards.
The described mat woven of fine bamboo strips two stage enhancement type spiral boards keep off again dehydration wet down demister and are composited by export-oriented spiral board and the multiple baffle group of streamlined concentric circles, and the multiple baffle group of streamlined concentric circles is arranged on export-oriented spiral board below.
The multiple baffle group of described streamlined concentric circles is comprised of some concentric sleeves, and between each sleeve, spacing radially outwards increases progressively successively, and each sleeve height radially outwards successively decreases successively, and one end of each sleeve is same level.
Described smoke-intake pipe road is horizontal by 12-16 °, and the Way in smoke-intake pipe road down.
The utility model has the advantages that:
1, the utility model dust-laden vapor stream flue gas ash removal efficiency is high.In the dust-laden vapor stream flue gas that slag processing produces, being less than 10 μ m dust sizes, to account for percentage by volume be 44%.The utility model is in the solidifying trapping of mist appropriate location, district, in tower, inject the droplet group of different fine grain or the droplet group of absorbent, form the highdensity mist group mist field that suspended particulate is core of take, the injection intercept layer of flowing through---the utility model indication rod grid layer, by dynamic high-efficiency, condensed, interception, simultaneously, secondary dehydration wet down demister adopts enhancement mode spiral board to keep off again dehydration wet down demister, the demist of efficiently drying, total efficiency of dust collection >=98% of slag processing dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester, compare and be generally used for the total efficiency of dust collection raising 12% of this type of dust-laden vapor stream flue gas ash removal spray column.
2, the utility model can be saved energy consumption.Owing to having improved the dedusting classification efficiency to relatively fine particle thing in the solidifying section of mist, thereby can change in spray washing section the way that conventionally adopts large liquid-gas ratio transition to wash at this section for trapping fine particle, at lower liquid-gas ratio, be issued to higher udst separation efficiency, reduced the internal circulating load of circulation fluid.Thereby reduced total power consumption of system for wet purification.Compare common Wet-type spray scrubbing tower cleaning system for dedusting, under equal conditions, liquid-gas ratio can reduce 33%, just can reach desirable efficiency of dust collection.
Due to the minimizing of internal circulating load, exhaust gas volumn is constant, and liquid-gas ratio reduces, and the corresponding reduction of spray scrubber dampness, has also just reduced fan energy consumption.
Compare with common Wet-type spray scrubbing tower, total spray in the constant situation of liquid measure, again owing to reducing the liquid-gas ratio of spray washing layer, for increasing a section low level lift spray amount, total power consumption of detergent circulator can reduce, by spray washing layer spray liquid measure, account for 80% of total amount of liquor, power consumption declines 5%.
Minimizing, solution feed pump total (pumping) head due to cleaning solution internal circulating load reduces like this, and total power consumption approximately reduces by 38%.
The utility model adopts first order enhancement mode spiral board to keep off again dehydration wet down demister, and this dehydration wet down demister is composited by one group of export-oriented spiral board and the multiple baffle group of streamlined concentric circles.The fine droplet being used in separated rising flue gas.When wet flue gas is done spiral motion through export-oriented spiral board, mechanical water drop that wet flue gas carries part forms liquid film on spiral-plate leaf because effect of inertia is trapped in, liquid stream, liquid stream is along the centrifugal wall that becomes of plate face short distance, complete gas-liquid separation, when leaving spiral board, wet flue gas obtains eddy flow energy, the centrifugal wall that becomes of the water droplet that may carry secretly in eddy flow flue gas, further complete gas-liquid separation, but along with wet flue gas is away from plate face, the suffered centrifugal wall active force that becomes of drop weakens rapidly, the downstream that is arranged on export-oriented spiral board by the multiple baffle group of the streamlined concentric circles of eddy flow Streamline Design is suitably apart from cross section, directly accept and utilize the eddy flow energy weakening gradually, the small droplet remaining in wet flue gas closely forms wall, and to wander the wall that again become on spiral board separated from flue gas with multilayer concentric plectane face collision.Thereby improve always dehydration wet down demist efficiency, in this process, the multiple baffle group of streamlined concentric circles takes full advantage of eddy flow energy, and the resistance consuming damage itself is minimum, realizes low energy consumption dehydration wet down demister.
3, the utility model adopts tower that second level enhancement mode spiral board is set outward and keeps off again dehydration wet down demister, and different range value is got in the design of secondary dehydration wet down demister gas perforation kinetic energy factor.Effectively improve and remove the particle diameter width that spray film drips, thereby reach the demist of high-efficiency dehydration wet down.Smoke evacuation droplet content≤75mg/Nm
3.
4, the utility model is more suitable for the purification process of dust-laden vapor stream flue gas characteristic.The dust-laden vapor stream smoke moisture that slag processing produces is large, water capacity up to: 13%--24%, the superfine powder that the dust of carrying under one's arms is slag, has the hydraulicity and adhesion.The drop being detained due to dehydrated wet down demister contains solid, causes the fouling of dehydration wet down demister bonding, and flow resistance increases.
The utility model enters before first order enhancement mode spiral board keeps off dehydration wet down demister again one group of fine water fog spraying gun is set at flue gas, spray gun is to the thin water smoke of dehydration wet down demister jet surface certain pressure, the online water membrane that forms on its surface, overcome the easily bonding fouling of operation existence in the wet cigarette containing after the solidifying property of the hydraulicity and glue (knot) purifies for a long time of common spiral board or deflection plate dehydration wet down demister, the drawback that causes flow resistance to increase.There is stronger anti stick, scale-preventing performance, strengthened escaping the cohesion trapping of excessive water smoke drop simultaneously.Moreover secondary rinses frequency and each washing time, washing water quantity all reduce, and saves flushing pump power consumption.Compare common superficial linear velocity in a column fluctuation range and all can obtain stable dehydration wet down demist efficiency in 10% scope.Compare common spiral board or deflection plate dehydration wet down demister dehydration rate raising 6%.
5, all spray guns of the utility model device are all furnished with floor installation on outer tower wall, and one or several nozzle are housed on single spray gun barral of a gun, and operating personnel can implement whole maintenance to spray gun and change or dismounting outside tower.Realize and do not shut down online dismounting maintenance, without personnel, enter dismounting maintenance in tower, improved operation maintainer's working condition, swift to operate, safe, reliable.
6, the utility model is due to the integrated equipment for the treatment of apparatus, compact in design, and it is few that floor space is compared common spray column.Owing to adopting reducing tower, spraying spray section superficial linear velocity in a column is higher, and tower diameter is less, mat woven of fine bamboo strips one-level dehydration wet down demister section amplifies, external dehydration wet down demister is installed on down pass, and under identical processing air quantity condition, capital cost, equipment investment expense all have technology lower than oneself.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1 is scrubbing tower, the 2nd, excellent grid layer, the 3rd, smoke-intake pipe road, the 4th, thin liquid spray painting rifle, the 5th, two-fluid spray gun, the 6th, spraying layer, the 7th, excellent grid layer flushing water spray gun assembly, the 8th, spraying layer feed pipe interface, the 9th, flushing liquor interface, the 10th, thin liquid spray painting rifle group is for liquid interface, the 11st, two-fluid spray gun group is for liquid interface, the 12nd, two-fluid spray gun group is for calming the anger interface, the 13rd, planar grille, the 14th, export-oriented spiral board, the 15th, the multiple baffle group of streamlined concentric circles, the 16th, down pass, the 17th, smoke pipeline, the 18th, blowdown skewed slot, the 19th, blow-off line, the 20th, effluent cycle sedimentation basin, the 21st, effluent outfall, the 22nd, water seal, I is the solidifying trapping of mist district, IIShi spray washing district, III is that dehydration wet down is except fog-zone.
The specific embodiment
Embodiment 1
Slag processing dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester is the way of contact of wet type multilayer gas-liquid counter current, minute section spraying in scrubbing tower 1, spray, the demist of dehydration wet down, high-efficiency purification process, in Xian Di tower 1, the solidifying trapping of dynamic formation mist from bottom to top district I, spray washing district II, dehydration wet down, except fog-zone III, are sprayed intercept layer and are comprised of one group of single or multiple lift rod grid layer 2.
The utility model is realized the udst separation of slag processing dust-laden vapor stream flue gas Wet-type high-efficient wet down in the following manner.
Under the negative pressure suction of blower fan, the dust-laden vapor stream flue gas of drawing from slag treating apparatus, from smoke-intake pipe road, 3 are oblique scrubbing tower 1 14 ° of angles with plane, first contact washing, cooling, wet down with the cleaning solution of letting out under spray.
The up certain distance of flue gas, in smoke inlet cross section, to spraying between intercept layer, on appropriate section, be against air-flow one group thin liquid spray painting rifle 4 is set, at this section, be upwards alternate, be staggered with thin liquid spray painting rifle 4 jet angles simultaneously, favorable current arranges one group of two-fluid spray gun 5, to this section, evenly spray the droplet group of different fine grain or the droplet group of absorbent, flue gas mixes with it.
During 5 normal operation of two-fluid spray gun, need control operation condition, supply with the compressed gas (air or nitrogen, steam) of certain pressure and the water (or absorption liquid) of certain pressure simultaneously.The inside of two-fluid spray gun 5 nozzles, the solution of compressed gas and water or absorbent, through the strike of several times, produces very tiny particle.Spray gun goes out oral fluid mist stream flow velocity and reaches 25m/s-37m/s, and during nozzle normal operation, generally the aero operating pressure at nozzle entrance place is 0.3-0.5 Mpa, and the operating pressure of water or absorbent is 0.3-0.65 Mpa.
The mixed flue gas that carries the spray particle group of different mist droplet particle sizes upwards passes through the single or multiple lift rod grid layer 2 arranging, and circulating face accounts for basal area 38--55%.
Rod grid floor 2 is upwards spray washing district II, Multi-layer sprinkling layer 6 is set, one group of rod grid layer flushing water spray gun assembly 7 is set above excellent grid layer 2.
All spray guns are all furnished with floor installation on outer tower wall, and operating personnel can implement integral replacing dismounting to spray gun outside tower.
Spray liquid adopts unit feed flow design processed, and spraying layer 6 cleaning solutions and mist eliminator flushing fresh water (FW) adopt respectively electric hydraulic valve group independently to control, to select economic operation model, flushing process completes automatically by programme-control.
Spraying layer 6 is by compositions such as the cleaning solution distribution endless tube with connecting branch and spray gun, nozzle, metal hoses.
The nozzle direction of bottom spraying layer 6 is two-way, and the nozzle direction of top layer spraying layer 6 is downward.Nozzle is evenly arranged on the cross section of ascending zone, and its spray coverage rate is greater than 200%.Spray liquid adopts unit feed flow design processed, spraying layer 6 is by 8 accesses of spraying layer feed pipe interface, one-level two stage enhancement type spiral boards keep off dehydration wet down demister again by 9 accesses of flushing liquor interface, and thin liquid spray painting rifle 4 is rented and supplied liquid interface 10 accesses, two-fluid spray gun 5 by two-fluid spray gun group, for the interface 12 of calming the anger, to be accessed for liquid interface 11 accesses, two-fluid spray gun 5 by two-fluid spray gun group by thin liquid spray painting rifle.Spraying layer and mist eliminator flushing fresh water (FW) adopt respectively electric hydraulic valve group independently to control, to select economic operation model.
Spraying layer is upwards for removing fog-zone III for dehydration wet down.
Spray washing district II and dehydration wet down arrange plane barrier 13 except between the III of fog-zone, adopt the steel band of proper width to be made.
Dehydration wet down is kept off dehydration wet down demister again except being provided with first order enhancement mode spiral board in the III of fog-zone, described first order enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board 14 and the multiple baffle group 15 of streamlined concentric circles, the multiple baffle group 15 of streamlined concentric circles is arranged on export-oriented spiral board 14 tops, export-oriented spiral board 14 belows are provided with one group thin liquid spray painting rifle 4, and described thin liquid spray painting rifle 4 directions upwards.
Flue gas flow direction down pass 16 after first order enhancement mode spiral board keeps off dehydration wet down demister again, second level enhancement mode spiral board is set on down pass 16 and keeps off again dehydration wet down demister, second level enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board 14 and the multiple baffle group 15 of streamlined concentric circles, and the multiple baffle group 15 of streamlined concentric circles is arranged on export-oriented spiral board 14 belows.
The utility model adopts first order enhancement mode spiral board to keep off again dehydration wet down demister and second level enhancement mode spiral board and keeps off again dehydration wet down demister and all introduce flushing liquor, and flushing process and cycle complete automatically by programme-control.At flue gas, enter before first order enhancement mode spiral board keeps off dehydration wet down demister again one group thin liquid spray painting rifle 4 is set simultaneously, thin liquid spray painting rifle 4 keeps off the thin water smoke of dehydration wet down demister jet surface certain pressure again to first order enhancement mode spiral board, the online water membrane that forms on its surface, effectively prevents that the first order enhancement mode spiral board from keeping off dehydration wet down demister surface bonding again.Strengthened escaping the cohesion trapping of excessive water smoke drop simultaneously, effectively improved dehydration wet down demist efficiency.
Two after efficient demist its outlet water droplet amount of carrying≤75mg/Nm3, the air-flow of guaranteeing to enter blower fan is clean, clean flue gas is through 17 discharges of smoke pipeline.
The muddy water being captured enters scrubbing tower 1 bottom blow-down skewed slot 18, collects by blow-off line 19 water seals, to rush grey structure and drain into effluent cycle sedimentation basin 20; The parting liquid that two stage enhancement type spiral boards keep off dehydration wet down demister again enters water seal 22 through effluent outfall 21, and water seal 22 upper reaches sewage drain into effluent cycle sedimentation basin 20.
In effluent cycle sedimentation basin 20, complete cooling, clarification, supernatant enters circulatory pool clear water zone, by circulating pump supply arrangement, is recycled.
Dedusting plaster is concentrated in effluent cycle sedimentation basin 20, by pump timing extraction under dreg slurry, delivers to drying bed and processes.
Embodiment 2
Iron and steel corporation slag is processed comprehensive reformation project, adopts drum process slag treatment process, and the dust-laden vapor stream humidity of flue gas of drawing from slag treating apparatus is high: 13%--15%, the superfine powder that the dust of carrying under one's arms is slag, has the hydraulicity and glutinous (knot) property.From dust-laden particle diameter, distribute: shared percentage by volume/%: particle diameter > 10 μ m account for 56%, particle diameter 2--10 μ m accounts for 32% all the other < 2 μ m and accounts for 12%.Select slag processing dust-laden vapor stream flue gas wet spray spraying dedusting device.
Wet-type spray cleaner, before being located at air-introduced machine, after purifying, gas is disposed to atmosphere through blower fan, aiutage.
The relevant operational factor of the present embodiment is as follows
Smoke treatment amount 20 * 10
4m
3/ h
80 ~ 100 ℃ of input gas temperatures
Dust inlet initial concentration 1000mg/Nm
3
Void tower velocity of flue gas 4 (m/s)
Dehydration wet down is except fog-zone velocity of flue gas 3.4 (m/s)
One group of two-fluid spray gun
Two groups, thin liquid spray painting rifle
Under the negative pressure suction of blower fan, the dust-laden vapor stream flue gas of drawing from slag treating apparatus, from smoke-intake pipe road, 3 are oblique scrubbing tower 1 14 ° of angles with plane, first contact washing, cooling, humidification with the absorption liquid of letting out under spray.
The up certain distance of flue gas, in smoke inlet cross section, to spraying between intercept layer, on appropriate section, be against air-flow one group thin liquid spray painting rifle 4 is set, at this section, be upwards alternate, be staggered with thin liquid spray painting rifle 4 jet angles simultaneously, favorable current arranges one group of two-fluid spray gun 5, to this section, evenly spray the droplet group of different fine grain or the droplet group of absorbent, flue gas mixes with it.
During 5 normal operation of two-fluid spray gun, need control operation condition, supply with the compressed gas (air or nitrogen, steam) of certain pressure and the water (or absorption liquid) of certain pressure simultaneously.The inside of two-fluid spray gun 5 nozzles, the solution of compressed gas and water or absorbent, through the strike of several times, produces very tiny particle.Spray gun goes out oral fluid mist stream flow velocity and reaches 25m/s-37m/s, and during nozzle normal operation, generally the aero operating pressure at nozzle entrance place is 0.3-0.5 Mpa, and the operating pressure of water or absorbent is 0.3-0.65 Mpa.
The mixed flue gas that carries the spray particle group of different mist droplet particle sizes upwards passes through the single or multiple lift rod grid layer 2 arranging, and circulating face accounts for basal area 38--55%.
Rod grid floor 2 is upwards spray washing district II, Multi-layer sprinkling layer 6 is set, one group of rod grid layer flushing water spray gun assembly 7 is set above excellent grid layer 2.
All spray guns are all furnished with floor installation on outer tower wall, and operating personnel can implement integral replacing dismounting to spray gun outside tower.
Spray liquid adopts unit feed flow design processed, and spraying layer 6 cleaning solutions and mist eliminator flushing fresh water (FW) adopt respectively electric hydraulic valve group independently to control, to select economic operation model, flushing process completes automatically by programme-control.
Spraying layer 6 is by compositions such as the cleaning solution distribution endless tube with connecting branch and spray gun, nozzle, metal hoses.
The nozzle direction of bottom spraying layer 6 is two-way, and the nozzle direction of top layer spraying layer 6 is downward.Nozzle is evenly arranged on the cross section of ascending zone, and its spray coverage rate is greater than 200%.Spray liquid adopts unit feed flow design processed, spraying layer 6 is by 8 accesses of spraying layer feed pipe interface, one-level two stage enhancement type spiral boards keep off dehydration wet down demister again by 9 accesses of flushing liquor interface, and thin liquid spray painting rifle 4 is rented and supplied liquid interface 10 accesses, two-fluid spray gun 5 by two-fluid spray gun group, for the interface 12 of calming the anger, to be accessed for liquid interface 11 accesses, two-fluid spray gun 5 by two-fluid spray gun group by thin liquid spray painting rifle.Spraying layer and mist eliminator flushing fresh water (FW) adopt respectively electric hydraulic valve group independently to control, to select economic operation model.
Spraying layer is upwards for removing fog-zone III for dehydration wet down.
Spray washing district II and dehydration wet down arrange plane barrier 13 except between the III of fog-zone, adopt the steel band of proper width to be made.
Dehydration wet down is kept off dehydration wet down demister again except being provided with first order enhancement mode spiral board in the III of fog-zone, described first order enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board 14 and the multiple baffle group 15 of streamlined concentric circles, the multiple baffle group 15 of streamlined concentric circles is arranged on export-oriented spiral board 14 tops, export-oriented spiral board 14 front lower places are provided with one group thin liquid spray painting rifle 4, and described thin liquid spray painting rifle 4 directions upwards.
Flue gas flow direction down pass 16 after first order enhancement mode spiral board keeps off dehydration wet down demister again, the mat woven of fine bamboo strips two stage enhancement type spiral boards are set on down pass 16 and keep off again dehydration wet down demister, second level enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board 14 and the multiple baffle group 15 of streamlined concentric circles, and the multiple baffle group 15 of streamlined concentric circles is arranged on export-oriented spiral board 14 belows.
The utility model adopts first order enhancement mode spiral board to keep off again dehydration wet down demister and second level enhancement mode spiral board and keeps off again dehydration wet down demister and all introduce flushing liquor, and flushing process and cycle complete automatically by programme-control.At flue gas, enter before first order enhancement mode spiral board keeps off dehydration wet down demister again one group thin liquid spray painting rifle 4 is set simultaneously, thin liquid spray painting rifle 4 keeps off the thin water smoke of dehydration wet down demister jet surface certain pressure again to first order enhancement mode spiral board, the online water membrane that forms on its surface, effectively prevents that the first order enhancement mode spiral board from keeping off dehydration wet down demister surface bonding again.
Two after efficient demist its outlet water droplet amount of carrying≤75mg/Nm3, the air-flow of guaranteeing to enter blower fan is clean, clean flue gas is through 17 discharges of smoke pipeline.
The muddy water being captured enters scrubbing tower 1 bottom blow-down skewed slot 18, collects by blow-off line 19 water seals, to rush grey structure and drain into effluent cycle sedimentation basin 20; The parting liquid that two stage enhancement type spiral boards keep off dehydration wet down demister again enters water seal 22 through effluent outfall 21, and water seal 22 upper reaches sewage drain into effluent cycle sedimentation basin 20.
In effluent cycle sedimentation basin 20, complete cooling, clarification, supernatant enters circulatory pool clear water zone, by circulating pump supply arrangement, is recycled.
Dedusting plaster is concentrated in effluent cycle sedimentation basin 20, by pump timing extraction under dreg slurry, delivers to drying bed and processes.
After dedusting and purifying device is processed, efficiency of dust collection >=98%, spraying dust removal tower drag overall Pa≤1400Pa, 67 ℃ of exit gas temperatures.Compare common Wet-type spray scrubbing tower cleaning system liquid-gas ratio and reduce 22%.Equipment and blower fan power station, aiutage etc. take up an area 120 square metres.
The utility model is due to the integrated equipment for the treatment of apparatus, and compact in design, comprises only 105m of the floor spaces such as blower fan power station, aiutage
2, sewage enters the unified precipitation process of effluent cycle sedimentation basin 20, and easy to operate, all spray guns are removably and are installed on tower body, and aerosol spray gun, spray washing water fog spraying gun are all made as center-control and on-site manual control model.Under identical processing air quantity condition, capital expenditure expense, equipment investment expense and operating cost all have technology lower than oneself, under equal conditions, liquid-gas ratio can reduce 33%, efficiency of dust collection >=98%, meets wet purification technology of new generation and device that country's special emission limit of new atmosphere pollution requires completely.Be widely used in the high temperature, high humidity, viscosity of the industries such as iron and steel, non-ferrous metal, cement building material, electric power, chemical industry large and containing the flue gas wet down udst separation of high resistivity dust, also can be for the cooling wet down system of coal gas.
Claims (8)
1. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester, it is characterized in that, comprise scrubbing tower and down pass, described scrubbing tower upper end and down pass upper end are connected to form passage, described scrubbing tower lower end is provided with smoke-intake pipe road, described down pass lower end is provided with smoke pipeline, in scrubbing tower, top, smoke-intake pipe road is provided with the solidifying trapping of mist district from bottom to top successively, spray washing district and dehydration wet down are except fog-zone, between mist solidifying trapping district and spray washing district, be provided with injection intercept layer, spray washing district and dehydration wet down are provided with planar grille except between fog-zone, dehydration wet down is kept off dehydration wet down demister again except establishing first order enhancement mode spiral board in fog-zone, first order enhancement mode spiral board keeps off again dehydration wet down demister below and is provided with one group thin liquid spray painting rifle, in down pass, be provided with second level enhancement mode spiral board and keep off again dehydration wet down demister.
2. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester according to claim 1, it is characterized in that, described injection intercept layer is comprised of single or multiple lift rod grid layer, the excellent grid cross section cloth column direction of the adjacent rod grid layer of single or multiple lift rod grid layer is identical and be alternate and be staggered, the excellent grid cross sectional shape of every layer of excellent grid layer is identical, cloth column direction is identical, and excellent grid spacing is equal, and described excellent grid are to be rearranged by solid pole or hollow circular-tube.
3. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester according to claim 1, it is characterized in that, the solidifying trapping of described injection intercept layer and mist is provided with one group of two-fluid spray gun and one group thin liquid spray painting rifle between district, described two-fluid spray gun is positioned at thin liquid spray painting rifle top and is downstream direction to be arranged, described thin liquid spray painting rifle is contrary air-flow and arranges and be alternate with two-fluid spray gun and be staggered.
4. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester according to claim 1, it is characterized in that, in described spray washing district, be provided with the above spraying layer of three floor or three floor from bottom to top, described spraying layer is comprised of cleaning solution distribution endless tube, spray gun and the nozzle with connecting branch, the nozzle of the spraying layer of top layer is unidirectional nozzle, direction is downward, and the nozzle of other spraying layers is two-way or single-direction and dual-direction mixing nozzle, and the nozzle of adjacent spraying layer is alternate and is staggered.
5. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester according to claim 1, it is characterized in that, described dehydration wet down is kept off dehydration wet down demister again except being provided with first order enhancement mode spiral board in fog-zone, described first order enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board and the multiple baffle group of streamlined concentric circles, the multiple baffle group of streamlined concentric circles is arranged on export-oriented spiral board top, export-oriented spiral board below is provided with one group thin liquid spray painting rifle, and described thin liquid spray painting rifle direction upwards.
6. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester according to claim 1, it is characterized in that, described second level enhancement mode spiral board keeps off again dehydration wet down demister and is composited by export-oriented spiral board and the multiple baffle group of streamlined concentric circles, and the multiple baffle group of streamlined concentric circles is arranged on export-oriented spiral board below.
7. according to the dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester described in claim 5 or 6, it is characterized in that, the multiple baffle group of described streamlined concentric circles is comprised of some concentric sleeves, between each sleeve, spacing radially outwards increases progressively successively, each sleeve height radially outwards successively decreases successively, and one end of each sleeve is same level.
8. dust-laden vapor stream flue gas Wet-type high-efficient wet down dust arrester according to claim 1, is characterized in that, described smoke-intake pipe road is horizontal by 12-16 °, and the Way in smoke-intake pipe road down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505232.3U CN203469721U (en) | 2013-08-19 | 2013-08-19 | Wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505232.3U CN203469721U (en) | 2013-08-19 | 2013-08-19 | Wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas |
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| CN203469721U true CN203469721U (en) | 2014-03-12 |
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| CN201320505232.3U Expired - Lifetime CN203469721U (en) | 2013-08-19 | 2013-08-19 | Wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104415628A (en) * | 2013-08-19 | 2015-03-18 | 江苏博际喷雾系统有限公司 | Wet efficient dehumidification dedusting apparatus for dust-containing steam flow flue gas |
| CN106512662A (en) * | 2016-11-15 | 2017-03-22 | 中石化南京工程有限公司 | Dust removing method and device for catalytic-cracking fume |
| 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 |
-
2013
- 2013-08-19 CN CN201320505232.3U patent/CN203469721U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104415628A (en) * | 2013-08-19 | 2015-03-18 | 江苏博际喷雾系统有限公司 | Wet efficient dehumidification dedusting apparatus for dust-containing steam flow flue gas |
| CN106512662A (en) * | 2016-11-15 | 2017-03-22 | 中石化南京工程有限公司 | Dust removing method and device for catalytic-cracking fume |
| 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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Address after: 225267 388 dung North Road, three dung Industrial Park, Fairfax Town, Jiangdu District, Yangzhou, Jiangsu Patentee after: JIANGSU BOJI SPRAYING SYSTEMS HOLDING Co.,Ltd. Address before: 225267 388 dung North Road, three dung Industrial Park, Fairfax Town, Jiangdu District, Yangzhou, Jiangsu Patentee before: JIANGSU BOJI SPRAYING SYSTEMS CO.,LTD. |
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Granted publication date: 20140312 |