CN104415628B - Containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus - Google Patents
Containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus Download PDFInfo
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- CN104415628B CN104415628B CN201310361175.0A CN201310361175A CN104415628B CN 104415628 B CN104415628 B CN 104415628B CN 201310361175 A CN201310361175 A CN 201310361175A CN 104415628 B CN104415628 B CN 104415628B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The present invention relates to containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus. comprise washing tower and down pass, described washing tower upper end and down pass upper end are connected to form passage, the lower end of described washing tower is provided with smoke-intake pipe road, the lower end of described down pass is provided with smoke pipeline, mist solidifying trapping district it is provided with above smoke-intake pipe road from bottom to top successively in washing tower, spray washing district and dehydration wet down are except fog-zone, it is provided with injection intercept layer between mist solidifying trapping district and spray washing district, spray washing district and dehydration wet down are provided with planar grille except between fog-zone, dehydration wet down keeps off dehydration wet down mist eliminator again except establishing first step enhancement type eddy flow plate in fog-zone, first step enhancement type eddy flow plate keeps off again and is provided with one group thin liquid mist spray gun below dehydration wet down mist eliminator, it is provided with second stage enhancement type eddy flow plate in down pass and keeps off dehydration wet down mist eliminator again. compact in design of the present invention, floor space is little, containing dirt vapour stream flue gas wet down efficiency of dust collection height, it is possible to energy efficient.
Description
Technical field
The present invention relates to a kind of cleaning apparatus, particularly relate to a kind of for prevention and control of air pollution containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, belong to flue-gas dust-removing and desulfurization refining plant technical field, it is also possible to cool wet down system for coal gas.
Background technology
Iron And Steel Industry is the basic industry of modern economic construction, modern national defense, is also resource, energy consumption rich and influential family, produces a large amount of byproducts and pollutent in process of production simultaneously, and energy-saving and emission-reduction task is urgent and heavy. In Air Pollution Control, on February 27th, 2013, country determines that the industry such as iron and steel, cement all will start to perform the special emission limit of atmospheric polluting material at Different periods. The improvement of strengthening inhalable dust, particularly airborne fine particulate matter (PM2.5). It is the more disposal of pollutants flue gas of iron and steel metallurgical industry containing dirt vapour stream flue gas, slag processing and utilization typically produces source containing dirt vapour stream flue gas, in Slag treatment process, high-temperature slag is being produced a large amount of superheated vapours during quick shrend, and steam airborne dust diffusion of carrying under one's arms is inevitable. Its main component is metal oxide particle, water vapour, is polluted by region environment.
Usually, cloth bag, sintered plate and electric precipitator are all the high-effective dust-removing technology of current mature and reliable, what be applied to the generation of Slag treatment process contains dirt vapour stream flue-gas dust removal and purification, the discharge index of 50mg/Nm3 can be reached, but shortcoming is also obvious: not only investment and working cost height, take up an area big, and when constructing the cycle long, the most important is that this tail gas water capacity is up to 13��24%, the dust carried under one's arms is the ultrafine powder of slag, character and the coagulation soil phase are similar, there is the hydraulicity and the solidifying property of glue (knot), cloth bag or sintered plate may easily harden, cause ash difficulty clearly.
According in the past this type of engineering practice and detection data: what slag processing produced accounts for percent by volume be about 32-44% containing being less than 10 ��m of dust sizes in dirt vapour stream flue gas. Percent by volume shared by pellet is higher, and trapping difficulty is big, simultaneously in Slag treatment device operation process, owing to the slag (composition, temperature) of slag differs, so the fluctuation of tail gas dust concentration, exhaust gas volumn is bigger.
Wet dust removal scheme, technique is simple, investment and working cost low, it is easy to implement, maximizing the benefits object can be reached. Even if but the low energy Wet-type spray scavenging tower of optimization design is used for gas cleaning dedusting usually, owing to adopting usual wet dust removal structure, particle diameter is that the fractional efficiency of 0--5 ��m of fine particle is only 60%-72% by it, the fractional efficiency of 5 10 ��m of inhalable dust is only 80%-90%, can lower than 90% containing the dirt total efficiency of dust collection of vapour stream flue gas to what suck that the higher slag processing of percent by volume shared by particulate matter produces. Can not stablize and reach the special emission limit requirement of atmospheric polluting material.
In recent years, what more iron and steel enterprise's employing flue spray method process slag processing process produced contains dirt vapour stream flue gas, but smoke catching weak effect, it is separated without reliable aqueous vapor again, formation cloud is carried under one's arms, and is spread by aiutage, causes pellet on a large scale to exceed standard. Simultaneously owing to flue spray for dust suppression method principle utilizes the density of inner flue gas of the stove and atmospheric density poor, produce draft by aiutage, washing by obtaining during spray washing district containing dirt vapour stream flue gas of flowing in flue is lowered the temperature with wet down. But it is weak containing the grit in dirt vapour stream flue gas and the inertial impaction between drop, interception and cohesion. And due to flue-gas temperature in aiutage low, water ratio height, dampness increases, and hot lifting draft weakens, smoke evacuation ability, a large amount of cigarette that overflows before Slag treatment equipment occurs, trapping weak effect. New [[whole nation prevention and control of air pollution action plan [planning]]] formulated of country is about to implement, the tighter requirement that the special emission limit of atmospheric polluting material requires, makes Iron And Steel Industry face environmental protection ' " end-of-term examination ". The more high performance wet dust removal gas purification techniques equipment being applicable to containing the flue gas characteristics such as dirt vapour stream is provided to become the urgent task polluted and reduce discharging for controlling the operations such as gold slag processing.
Summary of the invention
For above-mentioned defect, it is an object of the invention to provide a kind of can improve containing dirt vapour stream flue gas wet down efficiency of dust collection containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus.
The technical solution adopted in the present invention is for this reason: comprise washing tower and down pass, described washing tower upper end and down pass upper end are connected to form passage, the lower end of described washing tower is provided with smoke-intake pipe road, the lower end of described down pass is provided with smoke pipeline, mist solidifying trapping district it is provided with above smoke-intake pipe road from bottom to top successively in washing tower, spray washing district and dehydration wet down are except fog-zone, it is provided with injection intercept layer between mist solidifying trapping district and spray washing district, spray washing district and dehydration wet down are provided with planar grille except between fog-zone, it is provided with two stage enhancement type eddy flow plates in down pass and keeps off dehydration wet down mist eliminator again.
Described injection intercept layer is made up of individual layer or multi-layer bar gate layer, the excellent grid cross section cloth column direction of the adjacent rod gate layer of individual layer or multi-layer bar gate layer is identical and is staggered in alternate, the excellent grid cross-sectional shape of every layer of excellent gate layer is identical, cloth column direction is identical, rod grid spacing is equal, and described rod grid rearrange by solid pole or hollow circular-tube.
It is provided with one group of two-fluid spray gun and one group thin liquid mist spray gun between described injection intercept layer and mist solidifying trapping district, described two-fluid spray gun is positioned to be arranged above thin liquid mist spray gun and in downstream direction, and described thin liquid mist spray gun is arranged in inverse air-flow and is alternate being staggered with two-fluid spray gun.
The spraying layer of more than three floor or three floor it is provided with from bottom to top in described spray washing district, described spraying layer is made up of the washings distribution endless tube of band connecting branch, spray gun and nozzle, the nozzle of the spraying layer of most 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 being staggered.
Described dehydration wet down keeps off dehydration wet down mist eliminator again except being provided with first step enhancement type eddy flow plate in fog-zone, described first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group of export-oriented eddy flow plate and streamlined concentric(al) circles, the multiple baffle group of streamlined concentric(al) circles is arranged on above export-oriented eddy flow plate, being provided with one group thin liquid mist spray gun before export-oriented eddy flow plate, described thin liquid mist spray gun direction is upwards.
The described mat woven of fine bamboo strips two stage enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group of export-oriented eddy flow plate and streamlined concentric(al) circles, and the multiple baffle group of streamlined concentric(al) circles is arranged on below export-oriented eddy flow plate.
The multiple baffle group of described streamlined concentric(al) circles is made up of some concentric sleeves, and between each sleeve, spacing radially increases progressively successively, and each sleeve height radially successively decreases successively, and one end of each sleeve is same level.
Described smoke-intake pipe road is horizontal by 12-16 ��, and the entrance direction in smoke-intake pipe road is down.
It is an advantage of the invention that:
1, the present invention is containing dirt vapour stream flue gas ash removal efficiency height. slag processing produce containing being less than 10 ��m of dust sizes in dirt vapour stream flue gas, to account for percent by volume be 44%. the present invention is in mist solidifying trapping suitable position, district, the different droplet group of fine grain size or the droplet group of absorption agent is injected in tower, being formed highdensity take suspended particle as mist group's mist field of core, flowing through injection intercept layer---the present invention is referred to rod gate layer, condensed by dynamic high-efficiency, interception, simultaneously, two grades of dehydration wet down mist eliminators adopt enhancement type eddy flow plate to keep off dehydration wet down mist eliminator again, efficiently dry except mist, slag processing is containing dirt vapour stream flue gas Wet-type high-efficient total efficiency of dust collection >=98% of wet down cleaning apparatus, compare and it is generally used for this type of containing the total efficiency of dust collection raising 12% of dirt vapour stream flue gas ash removal spray column.
2, the present invention can energy efficient. Owing to improve the dedusting fractional efficiency to relatively fine particle thing in the solidifying section of mist, thus can to change in spray washing section be usually the way that trapping fine particle adopts big liquid-gas ratio transition to wash at this section, it is issued to higher udst separation efficiency at lower liquid-gas ratio, reduces the internal circulating load of circulation fluid. Thus reduce total electricity consumption of system for wet purification. Comparing usual Wet-type spray washing tower purification 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 washing tower dampness, also just reduces fan energy consumption.
Compared with usual Wet-type spray washing tower, when total spray liquid amount is constant, again owing to reducing the liquid-gas ratio of spray washing layer, for increasing a section low position lift spray amount, then total electricity consumption of detergent circulator can reduce, the 80% of total amount of liquor is accounted for, then the decline 5% of electricity consumption by spray washing layer spray liquid amount.
Like this owing to minimizing, the total lift of solution feed pump of washings internal circulating load reduce, total electricity consumption about reduces by 38%.
The present invention adopts first step enhancement type eddy flow plate to keep off dehydration wet down mist eliminator again, and this dehydration wet down mist eliminator is composited by the multiple baffle group of one group of export-oriented eddy flow plate and streamlined concentric(al) circles. the fine droplet being used in separation rising flue gas. when wet flue gas does spiral motion through export-oriented eddy flow plate, the mechanical water drop part that wet flue gas carries forms liquid film owing to inertia effect is trapped on spiral-plate leaf, liquid stream, liquid stream along plate face short distance centrifugal become wall, complete gas-liquid separation, eddy flow energy is obtained when wet flue gas leaves eddy flow plate, the water droplet may carried secretly in eddy flow flue gas centrifugal become wall, complete gas-liquid separation further, but along with wet flue gas is away from plate face, suffered by drop centrifugal become wall reactive force weaken rapidly, it is arranged on the suitable distance cross section, downstream of export-oriented eddy flow plate by the multiple baffle group of the streamlined concentric(al) circles of eddy flow Streamline Design, directly accept and utilize the eddy flow energy weakened gradually, the small droplet remained in wet flue gas closely with the collision of multilayer concentric plectane face and form wall and wander and be separated from flue gas by the wall that again becomes on eddy flow plate. thus improving total dehydration wet down demisting efficiency, in this process, the multiple baffle group of streamlined concentric(al) circles takes full advantage of eddy flow energy, and the resistance itself consumed is damaged minimum, it is achieved less energy-consumption dehydration wet down mist eliminator.
3, the present invention arranges second stage enhancement type eddy flow plate and keeps off dehydration wet down mist eliminator again outside adopting tower, and different range value is got in two grades of dehydration wet down mist eliminator gas perforation kinetic energy factor designs. Effectively improve the particle diameter width removing mist drop, thus reach high-efficiency dehydration wet down except mist. Smoke evacuation droplet content��75mg/Nm3��
4, the present invention is more suitable for the scavenging process containing dirt vapour stream flue gas characteristic. It is big containing dirt vapour stream smoke moisture that slag processing produces, water capacity up to: 13%--24%, the dust carried under one's arms is the ultrafine powder of slag, has the hydraulicity and adhesion. The drop being detained due to dehydrated wet down mist eliminator contains solids, causes dehydration wet down mist eliminator bonding fouling, and flow resistance increases.
The present invention enters before first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again at flue gas and arranges one group of fine water fog spraying gun, spray gun is to the water mists of dehydration wet down mist eliminator surface injection certain pressure, water membrane is formed online on its surface, overcome usual eddy flow plate or traverse baffle dehydration wet down mist eliminator for a long time in wet cigarette after purifying containing the solidifying property of the hydraulicity and glue (knot) operation existence easily bond fouling, cause the drawback that flow resistance increases. There is stronger anti stick, good antiscale property performance, enhance the cohesion to the water smoke drop escaping to overflow simultaneously and trap. Moreover two grades rinsed frequencies and each flush time, washing water quantity and all reduce, save flushing pump electricity consumption. Compare usual superficial velocity fluctuation range and all can obtain stable dehydration wet down demisting efficiency in 10% scope. Compare usual eddy flow plate or traverse baffle dehydration wet down mist eliminator dehydration rate raising 6%.
5, all spray guns of apparatus of the present invention are all furnished with floor installation on outer tower wall, and single root spray gun barral of a gun is equipped with one or several nozzles, and spray gun can be implemented overall examine and replace or dismounting by operator outside tower. Realize not shutting down dismounting maintenance online, it is not necessary to personnel enter dismounting maintenance in tower, improve the labor condition of operation maintenance personnel, swift to operate, safe, reliable.
6, the present invention is due to the integrated equipment for the treatment of unit, and compact in design, it is few that floor space compares usual spray column. Owing to adopting reducing tower type, spraying spray section superficial velocity is higher, and tower footpath is less, mat woven of fine bamboo strips one-level dehydration wet down mist eliminator section amplifies, external dehydration wet down mist eliminator is installed on down pass, and when identical process air quantity, capital cost, facility investment expense all have technology lower than oneself.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure, 1 is washing tower, 2 is rod gate layer, 3 is smoke-intake pipe road, 4 is thin liquid mist spray gun, 5 is two-fluid spray gun, 6 is spraying layer, 7 is rod gate layer wash-down water spray gun assembly, 8 is spraying layer feed flow interface tube, 9 is washing fluid interface, 10 is that thin liquid mist spray gun group is for liquid interface, 11 is that two-fluid spray gun group is for liquid interface, 12 is that two-fluid spray gun group is for calming the anger interface, 13 is planar grille, 14 is export-oriented eddy flow plate, 15 is the multiple baffle group of streamlined concentric(al) circles, 16 is down pass, 17 is smoke pipeline, 18 is blowdown skewed slot, 19 is blowdown pipeline, 20 is effluent cycle settling tank, 21 is effluent outfall, 22 is water seal, I is mist solidifying trapping district, II is spray washing district, III is that dehydration wet down is except fog-zone.
Embodiment
Embodiment 1
Slag processing is the wet type multilayer gas-liquid counter current way of contact containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, sectional spraying in washing tower 1, spray are drenched, dehydration wet down removes mist, high-efficiency purification process, in Xian Di tower 1, the district I of the solidifying trapping of dynamic formation mist from bottom to top, spray washing district II, dehydration wet down are except fog-zone III, spray intercept layer and are made up of one group of individual layer or multi-layer bar gate layer 2.
The present invention realizes slag processing in the following manner containing dirt vapour stream flue gas Wet-type high-efficient wet down udst separation.
Under the negative pressure-pumping of blower fan, containing dirt vapour stream flue gas from what Slag treatment device was drawn, be that 14 �� of angle declivities enter washing tower 1 from smoke-intake pipe road 3 and plane, the washings let out under first drenching with spray contacts washing, cooling, wet down.
Row certain distance on flue gas, between smoke inlet transverse section to injection intercept layer, appropriate section arranges one group thin liquid mist spray gun 4 in inverse air-flow, simultaneously this section with thin liquid mist spray gun 4 jet angle be upwards alternate, be staggered, pleasant stream arranges one group of two-fluid spray gun 5, evenly spray the different droplet group of fine grain size or the droplet group of absorption agent to this section, flue gas mixes with it.
During two-fluid spray gun 5 normal operation, it is necessary to control operational condition, supplies the compressed gas (air or nitrogen, steam) of certain pressure and the water (or absorbing liquid) of certain pressure simultaneously. The inside of two-fluid spray gun 5 nozzle, the solution of compressed gas and water or absorption agent, through the strike of several times, produces very tiny particle. Lance outlet liquid mist stream flow velocity reaches 25m/s-37m/s, and during nozzle normal operation, the aero operating pressure at nozzle entrance place is the operating pressure of 0.3-0.5Mpa, water or absorption agent under normal circumstances is 0.3-0.65Mpa.
The mixed flue gas of spray particle group carrying different mist droplet particle size is upwards by individual layer or the multi-layer bar gate layer 2 of setting, and circulating face accounts for the long-pending 38--55% of section.
Rod gate layer 2 is upwards spray washing district II, arranges Multi-layer sprinkling layer 6, arranges one group of rod gate layer wash-down water spray gun assembly 7 above rod gate layer 2.
All spray guns are all furnished with floor installation on outer tower wall, and spray gun can be implemented integral replacing dismounting by operator outside tower.
Spray liquid adopts the design of unit style feed flow, and spraying layer 6 washings and mist eliminator flushing process water adopt electric hydraulic valve group independently to control respectively, to select economic operation model, flushing process is completed automatically by time variable control.
Spraying layer 6 is by the washings distribution composition such as endless tube and spray gun, nozzle, metallic hose of band connecting branch.
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 is drenched fraction of coverage and is greater than 200%. Spray liquid adopts the design of unit style feed flow, spraying layer 6 is accessed by spraying layer feed flow interface tube 8, one-level two stage enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and accesses by washing fluid interface 9, and thin liquid mist spray gun 4 is accessed for liquid interface 10 by thin liquid mist spray gun rent, two-fluid spray gun 5 is accessed for liquid interface 11 by two-fluid spray gun group, two-fluid spray gun 5 is accessed for interface 12 of calming the anger by two-fluid spray gun group. Spraying layer and mist eliminator flushing process water adopt electric hydraulic valve group independently to control respectively, to select economic operation model.
Spraying layer is upwards for for dehydration wet down is except fog-zone III.
Spray washing district II and dehydration wet down, except arranging plane between the III of fog-zone every grid 13, adopt the steel band of proper width to be made.
Dehydration wet down keeps off dehydration wet down mist eliminator again except being provided with first step enhancement type eddy flow plate in the III of fog-zone, described first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group 15 of export-oriented eddy flow plate 14 and streamlined concentric(al) circles, the multiple baffle group 15 of streamlined concentric(al) circles is arranged on above export-oriented eddy flow plate 14, being provided with one group thin liquid mist spray gun 4 below export-oriented eddy flow plate 14, described thin liquid mist spray gun 4 direction is upwards.
Flue gas flow direction down pass 16 after dehydration wet down mist eliminator is kept off again through first step enhancement type eddy flow plate, down pass 16 arranges second stage enhancement type eddy flow plate and keeps off dehydration wet down mist eliminator again, second stage enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group 15 of export-oriented eddy flow plate 14 and streamlined concentric(al) circles, and the multiple baffle group 15 of streamlined concentric(al) circles is arranged on below export-oriented eddy flow plate 14.
The present invention adopt first step enhancement type eddy flow plate again keep off dehydration wet down mist eliminator and second stage enhancement type eddy flow plate again keep off dehydration wet down mist eliminator all introduce washing fluid, flushing process and cycle are completed automatically by time variable control. Enter before first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again at flue gas simultaneously and one group thin liquid mist spray gun 4 is set, thin liquid mist spray gun 4 keeps off the water mists of dehydration wet down mist eliminator surface injection certain pressure again to first step enhancement type eddy flow plate, form water membrane online on its surface, effectively prevent the first step enhancement type eddy flow plate from keeping off dehydration wet down mist eliminator surface bonding again. Enhance the cohesion to the water smoke drop escaping to overflow to trap simultaneously, effectively improve dehydration wet down demisting efficiency.
Two through efficiently except its outlet water droplet carrying amount��75mg/Nm3 after mist, it is ensured that the air-flow entering blower fan is clean, and neat stress discharges through smoke pipeline 17.
The muddy water being captured enters washing tower 1 bottom blow-down skewed slot 18, drains into effluent cycle settling tank 20 through blowdown pipeline 19 water seal punching ash structure after collecting; The parting liquid that two stage enhancement type eddy flow plates keep off dehydration wet down mist eliminator again enters water seal 22 through effluent outfall 21, and water seal 22 upper reaches sewage drains into effluent cycle settling tank 20.
Completing cooling, clarification in effluent cycle settling tank 20, supernatant liquor enters clear water zone, circulation pond, recycles by recycle pump supply arrangement.
Dedusting plaster is concentrated in effluent cycle settling tank 20, by pump timing extraction under dreg slurry, delivers to drying bed process.
Embodiment 2
Iron and steel corporation Slag treatment comprehensive reformation project, adopts drum process slag treatment process, contains dirt vapour stream humidity of flue gas height: 13%--15% from what Slag treatment device was drawn, and the dust carried under one's arms is the ultrafine powder of slag, has the hydraulicity and glutinous (knot) property. From containing dirt size distribution: shared percent by volume/%: particle diameter > 10 ��m account for 56%, particle diameter 2--10 ��m accounts for 32% all the other < 2 ��m and accounts for 12%. Slag processing is selected to contain dirt vapour stream flue gas wet spray spraying dedusting device.
Wet-type spray dust removal installation, before being located at induced draft fan, after purification, gas is disposed to air through blower fan, aiutage.
The relevant operating parameter of the present embodiment is as follows
Smoke treatment amount 20 �� 104m3/h
Input gas temperature 80 ~ 100 DEG C
Dust inlet starting point concentration 1000mg/Nm3
Empty tower flue gas speed 4 (m/s)
Dehydration wet down is except fog-zone velocity of flue gas 3.4 (m/s)
Two-fluid spray gun one group
Thin liquid mist spray gun two groups
Under the negative pressure-pumping of blower fan, containing dirt vapour stream flue gas from what Slag treatment device was drawn, be that 14 �� of angle declivities enter washing tower 1 from smoke-intake pipe road 3 and plane, the absorbing liquid let out under first drenching with spray contacts washing, cooling, increases and wet.
Row certain distance on flue gas, between smoke inlet transverse section to injection intercept layer, appropriate section arranges one group thin liquid mist spray gun 4 in inverse air-flow, simultaneously this section with thin liquid mist spray gun 4 jet angle be upwards alternate, be staggered, pleasant stream arranges one group of two-fluid spray gun 5, evenly spray the different droplet group of fine grain size or the droplet group of absorption agent to this section, flue gas mixes with it.
During two-fluid spray gun 5 normal operation, it is necessary to control operational condition, supplies the compressed gas (air or nitrogen, steam) of certain pressure and the water (or absorbing liquid) of certain pressure simultaneously. The inside of two-fluid spray gun 5 nozzle, the solution of compressed gas and water or absorption agent, through the strike of several times, produces very tiny particle. Lance outlet liquid mist stream flow velocity reaches 25m/s-37m/s, and during nozzle normal operation, the aero operating pressure at nozzle entrance place is the operating pressure of 0.3-0.5Mpa, water or absorption agent under normal circumstances is 0.3-0.65Mpa.
The mixed flue gas of spray particle group carrying different mist droplet particle size is upwards by individual layer or the multi-layer bar gate layer 2 of setting, and circulating face accounts for the long-pending 38--55% of section.
Rod gate layer 2 is upwards spray washing district II, arranges Multi-layer sprinkling layer 6, arranges one group of rod gate layer wash-down water spray gun assembly 7 above rod gate layer 2.
All spray guns are all furnished with floor installation on outer tower wall, and spray gun can be implemented integral replacing dismounting by operator outside tower.
Spray liquid adopts the design of unit style feed flow, and spraying layer 6 washings and mist eliminator flushing process water adopt electric hydraulic valve group independently to control respectively, to select economic operation model, flushing process is completed automatically by time variable control.
Spraying layer 6 is by the washings distribution composition such as endless tube and spray gun, nozzle, metallic hose of band connecting branch.
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 is drenched fraction of coverage and is greater than 200%. Spray liquid adopts the design of unit style feed flow, spraying layer 6 is accessed by spraying layer feed flow interface tube 8, one-level two stage enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and accesses by washing fluid interface 9, and thin liquid mist spray gun 4 is accessed for liquid interface 10 by thin liquid mist spray gun rent, two-fluid spray gun 5 is accessed for liquid interface 11 by two-fluid spray gun group, two-fluid spray gun 5 is accessed for interface 12 of calming the anger by two-fluid spray gun group. Spraying layer and mist eliminator flushing process water adopt electric hydraulic valve group independently to control respectively, to select economic operation model.
Spraying layer is upwards for for dehydration wet down is except fog-zone III.
Spray washing district II and dehydration wet down, except arranging plane between the III of fog-zone every grid 13, adopt the steel band of proper width to be made.
Dehydration wet down keeps off dehydration wet down mist eliminator again except being provided with first step enhancement type eddy flow plate in the III of fog-zone, described first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group 15 of export-oriented eddy flow plate 14 and streamlined concentric(al) circles, the multiple baffle group 15 of streamlined concentric(al) circles is arranged on above export-oriented eddy flow plate 14, export-oriented eddy flow plate 14 front lower place is provided with one group thin liquid mist spray gun 4, and described thin liquid mist spray gun 4 direction is upwards.
Flue gas flow direction down pass 16 after dehydration wet down mist eliminator is kept off again through first step enhancement type eddy flow plate, down pass 16 arranges the mat woven of fine bamboo strips two stage enhancement type eddy flow plate and keeps off dehydration wet down mist eliminator again, second stage enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group 15 of export-oriented eddy flow plate 14 and streamlined concentric(al) circles, and the multiple baffle group 15 of streamlined concentric(al) circles is arranged on below export-oriented eddy flow plate 14.
The present invention adopt first step enhancement type eddy flow plate again keep off dehydration wet down mist eliminator and second stage enhancement type eddy flow plate again keep off dehydration wet down mist eliminator all introduce washing fluid, flushing process and cycle are completed automatically by time variable control. Enter before first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again at flue gas simultaneously and one group thin liquid mist spray gun 4 is set, thin liquid mist spray gun 4 keeps off the water mists of dehydration wet down mist eliminator surface injection certain pressure again to first step enhancement type eddy flow plate, form water membrane online on its surface, effectively prevent the first step enhancement type eddy flow plate from keeping off dehydration wet down mist eliminator surface bonding again.
Two through efficiently except its outlet water droplet carrying amount��75mg/Nm3 after mist, it is ensured that the air-flow entering blower fan is clean, and neat stress discharges through smoke pipeline 17.
The muddy water being captured enters washing tower 1 bottom blow-down skewed slot 18, drains into effluent cycle settling tank 20 through blowdown pipeline 19 water seal punching ash structure after collecting; The parting liquid that two stage enhancement type eddy flow plates keep off dehydration wet down mist eliminator again enters water seal 22 through effluent outfall 21, and water seal 22 upper reaches sewage drains into effluent cycle settling tank 20.
Completing cooling, clarification in effluent cycle settling tank 20, supernatant liquor enters clear water zone, circulation pond, recycles by recycle pump supply arrangement.
Dedusting plaster is concentrated in effluent cycle settling tank 20, by pump timing extraction under dreg slurry, delivers to drying bed process.
After dedusting and purifying device processes, efficiency of dust collection >=98%, spraying dust removal tower total-resistance Pa��1400Pa, exit gas temperature 67 DEG C. Compare usual Wet-type spray washing tower purification system liquid-gas ratio and reduce 22%. Equipment and blower fan power station, aiutage etc. take up an area 120 square metres.
The present invention is due to the integrated equipment for the treatment of unit, and compact in design, comprises the floor space only 105m such as blower fan power station, aiutage2, sewage enters the unified precipitation process of effluent cycle settling tank 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 set to center-control and on-site manual master mode. When identical process air quantity, initial cost expense, facility investment expense and working 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 the new special emission limit of atmospheric polluting material of country requires completely. The high temperature, the height that are widely used in the industries such as iron and steel, non-ferrous metal, cement building material, electric power, chemical industry wet, viscosity is big and contain the flue gas wet down udst separation of high resistivity dust, it is also possible to cool wet down system for coal gas.
Claims (6)
1. containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, it is characterized in that, comprise washing tower and down pass, described washing tower upper end and down pass upper end are connected to form passage, the lower end of described washing tower is provided with smoke-intake pipe road, the lower end of described down pass is provided with smoke pipeline, mist solidifying trapping district it is provided with above smoke-intake pipe road from bottom to top successively in washing tower, spray washing district and dehydration wet down are except fog-zone, it is provided with injection intercept layer between mist solidifying trapping district and spray washing district, spray washing district and dehydration wet down are provided with planar grille except between fog-zone, dehydration wet down keeps off dehydration wet down mist eliminator again except establishing first step enhancement type eddy flow plate in fog-zone, first step enhancement type eddy flow plate keeps off again and is provided with one group thin liquid mist spray gun below dehydration wet down mist eliminator, it is provided with second stage enhancement type eddy flow plate in down pass and keeps off dehydration wet down mist eliminator again, it is provided with one group of two-fluid spray gun and one group thin liquid mist spray gun between described injection intercept layer and mist solidifying trapping district, described two-fluid spray gun is positioned to be arranged above thin liquid mist spray gun and in downstream direction, described thin liquid mist spray gun is arranged in inverse air-flow and is alternate being staggered with two-fluid spray gun, described first step enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group of export-oriented eddy flow plate and streamlined concentric(al) circles, the multiple baffle group of streamlined concentric(al) circles is arranged on above export-oriented eddy flow plate, one group thin liquid mist spray gun it is provided with below export-oriented eddy flow plate, described thin liquid mist spray gun direction is upwards.
2. according to claim 1 containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, it is characterized in that, described injection intercept layer is made up of individual layer or multi-layer bar gate layer, the excellent grid cross section cloth column direction of the adjacent rod gate layer of individual layer or multi-layer bar gate layer is identical and is staggered in alternate, the excellent grid cross-sectional shape of every layer of excellent gate layer is identical, cloth column direction is identical, and rod grid spacing is equal, and described rod grid rearrange by solid pole or hollow circular-tube.
3. according to claim 1 containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, it is characterized in that, the spraying layer of more than three floor or three floor it is provided with from bottom to top in described spray washing district, described spraying layer is made up of the washings distribution endless tube of band connecting branch, spray gun and nozzle, the nozzle of the spraying layer of most 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 being staggered.
4. according to claim 1 containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, it is characterized in that, described second stage enhancement type eddy flow plate keeps off dehydration wet down mist eliminator again and is composited by the multiple baffle group of export-oriented eddy flow plate and streamlined concentric(al) circles, and the multiple baffle group of streamlined concentric(al) circles is arranged on below export-oriented eddy flow plate.
5. according to claim 1 or 4 containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, it is characterized in that, the multiple baffle group of described streamlined concentric(al) circles is made up of some concentric sleeves, between each sleeve, spacing radially increases progressively successively, each sleeve height radially successively decreases successively, and one end of each sleeve is same level.
6. according to claim 1 containing dirt vapour stream flue gas Wet-type high-efficient wet down cleaning apparatus, it is characterised in that, described smoke-intake pipe road is horizontal by 12-16 ��, and the entrance direction in smoke-intake pipe road is down.
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| CN106244767B (en) * | 2015-09-04 | 2018-08-07 | 江苏博际喷雾系统股份有限公司 | A kind of adjustable circumferential weld washing dehydration demisting integrated tower of flue gas of converter |
| CN105999975B (en) * | 2016-08-01 | 2017-12-26 | 中冶京诚工程技术有限公司 | A kind of dedusting demister |
| CN106906016A (en) * | 2017-03-31 | 2017-06-30 | 山西都宝新能源发展研究院 | A kind of energy-efficient pretreatment process method for the gas that generates electricity |
| CN107890732A (en) * | 2017-12-21 | 2018-04-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of vapor absorbing apparatus for adding water humidification dust falling system for coke intermediate bin |
| CN109489434B (en) * | 2018-11-09 | 2019-10-22 | 南京瑞泰水泥制造设备有限公司 | A kind of fiery grading plant that disappears that gathers dust of cement produced with the dry method rotary kiln grate-cooler |
| CN110841444A (en) * | 2019-11-19 | 2020-02-28 | 长春工业大学 | Integrated device and process for simultaneously desulfurizing and denitrifying flue gas by liquid phase method |
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| CN1321724C (en) * | 2005-07-13 | 2007-06-20 | 杭州理想科技有限公司 | Super-thin spray cyclone double-way double-cycle dust-removing desulfurating apparatus |
| CN102059029B (en) * | 2010-11-25 | 2013-12-25 | 东南大学 | Method and device for removing fine particles in high-humidity gas fume |
| CN202224007U (en) * | 2011-04-25 | 2012-05-23 | 张蕊 | Rod-grid water film dust scrubber |
| CN203469721U (en) * | 2013-08-19 | 2014-03-12 | 江苏博际喷雾系统有限公司 | Wet type high-efficiency dehumidifying and dust-removing device of dusty steam-flow smoke gas |
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Address after: 225267 Yangzhou Province, Jiangdu District fairy town, the industrial park, the three ring road, No. 2, No. 388 North Road Applicant after: JIANGSU BOJI SPRAYING SYSTEMS HOLDING Co.,Ltd. Address before: 225267 Yangzhou Province, Jiangdu District fairy town, the industrial park, the three ring road, No. 2, No. 388 North Road Applicant before: JIANGSU BOJI SPRAYING SYSTEMS CO.,LTD. |
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Effective date of registration: 20160511 Address after: 225267 Yangzhou Province, Jiangdu District fairy town, the industrial park, the three ring road, No. 2, No. 388 North Road Applicant after: JIANGSU BOJI SPRAYING SYSTEMS HOLDING Co.,Ltd. Applicant after: SHANGHAI BAOSTEEL ENERGY TECH Co.,Ltd. Address before: 225267 Yangzhou Province, Jiangdu District fairy town, the industrial park, the three ring road, No. 2, No. 388 North Road Applicant before: JIANGSU BOJI SPRAYING SYSTEMS HOLDING Co.,Ltd. |