CN206965497U - A kind of wet desulphurization denitration dust collecting device - Google Patents
A kind of wet desulphurization denitration dust collecting device Download PDFInfo
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- CN206965497U CN206965497U CN201720836286.6U CN201720836286U CN206965497U CN 206965497 U CN206965497 U CN 206965497U CN 201720836286 U CN201720836286 U CN 201720836286U CN 206965497 U CN206965497 U CN 206965497U
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Abstract
The utility model discloses a kind of wet desulphurization denitration dust collecting device,Slurry pool is provided with from down to up it is characterized in that absorbing in shell,Gas approach,Rough cleaner,First grade desulfurizing spraying layer,One-level rises gas liquid trap,Denitration spraying layer,Two level rises gas liquid trap,Two-grade desulfurizing spraying layer,Three-level rises gas liquid trap,High-efficiency dust remover,High-efficiency dust remover rinses layer,Demister and mist eliminator flushing layer,Absorb shell peripheral hardware and put slurries pump,Overflow pipe,Denitration catch box,Denitration pump,Denitration grout recurrent canal,Desulfurization catch box,Desulfurization pump,Desulfurization slurry recurrent canal,Dedusting catch box,Flushing pump,Dedusting slurries recurrent canal,The utility model has the effect of simultaneous SO_2 and NO removal dedusting good,Gas-liquid mass transfer effect is good,The big no blocking of gas free air space,Small investment,Floor space is small,Stable and reliable operation,The simple cost of structure fabrication is low,The advantages that convenient for installation and maintenance.
Description
Technical field
Gas cleaning absorption plant is the utility model is related to, specifically a kind of simultaneous SO_2 and NO removal good dedusting effect,
The good desulphurization denitration dust arrester of gas-liquid mass transfer effect.
Background technology
With developing rapidly for China's industrial economy, the growth of energy resource consumption is also increasingly accelerated.Wherein, it is main using coal
The industrial production of fuel discharges substantial amounts of NOx, SO2, the toxic and harmful gas such as dust, cause air environmental pollution.With industry
The serious and enhancing of mankind's environmental consciousness of pollution, the purification of industrial waste gas are increasingly paid attention to by China, it should be entered
Row desulphurization and denitration and the processing of dedusting.
The main selective noncatalytic reduction (SNCR) of the method for industrial waste gas denitration at present, selective catalytic reduction
(SCR), oxidative absorption method etc..SNCR technological processes are simple, the few small investment of equipment, but denitration efficiency is low, and the escaping of ammonia wastes seriously,
Influenceed greatly by boiler operatiopn operating mode in addition.SCR carries out denitration in the presence of catalyst, and denitration efficiency is high, but carries out denitration, takes off
The ammonium hydrogen sulfate generated while nitre can produce corrosion and block to upstream device, and catalyst is easily blocked, inactivated, invest, change,
Maintenance cost is high.Wet oxidation absorption process is using oxidants such as sodium hypochlorite, chlorine dioxide, hydrogen peroxide, sodium chlorites to NO
Aoxidized, then the NOx of high-valence state is absorbed, be the method for suitable desulfurization and denitrification integral, existing oxidative absorption work
The shortcomings such as oxidant consumption is big, denitration efficiency is low be present in skill.
Wet desulfurizing process is mainly desulfurization method of limestone-gypsum technique at present, and traditional desulfurization method of limestone-gypsum has
The shortcomings of liquid-gas ratio is big, though desulfuration efficiency is high but is difficult to reach within 20mg/Nm3, and occupation area of equipment is big, investment is high.
Current minimum discharge cleaner is mainly wet electric cleaner, wet electric cleaner good dedusting effect, can be reached super
Low emission standard, but the investment of wet electric precipitation is big, and operating cost is high, limits its application in terms of minimum discharge dedusting.
In summary, current desulphurization plant, denitration device and cleaner are often separated that not only investment is high, accounts for
Ground area is big, and can not be carried out high-efficiency desulfurization denitration dust collecting simultaneously in absorption tower, so existing common desulphurization takes off
Nitre tower and cleaner can not meet requirement of the modern society for desulphurization denitration dedusting high efficiency, high load capacity.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, proposes that one kind can complete height simultaneously in absorption tower
The device of desulphurization denitration dedusting is imitated, a tower is solved and is unable to that simultaneous SO_2 and NO removal dedusting, desulphurization denitration efficiency of dust collection be low, liquid-gas ratio
Greatly, the problems such as equipment loss and operating cost be high, gas-liquid mass transfer effect difference.
To achieve these goals, the utility model is reached by following scheme：
A kind of wet desulphurization denitration dust collecting device, including absorb shell, it is characterised in that absorb and arrived in shell by down
On be sequentially provided with slurry pool, gas approach, rough cleaner, first grade desulfurizing spraying layer, one-level rise gas liquid trap, denitration spraying layer,
Two level rises gas liquid trap, two-grade desulfurizing spraying layer, three-level and rises gas liquid trap, high-efficiency dust remover, high-efficiency dust remover flushing layer, demisting
Device and mist eliminator flushing layer, wherein gas approach be arranged on absorb shell shell wall on, absorb shell peripheral hardware put slurries pump,
Overflow pipe, denitration catch box, denitration pump, denitration grout recurrent canal, desulfurization catch box, desulfurization pump, desulfurization slurry recurrent canal, remove
Dirt catch box, flushing pump, dedusting slurries recurrent canal, wherein slurry pool are connected through conduit with first grade desulfurizing spraying layer, on conduit
Provided with slurries pump, denitration catch box is connected through conduit with denitration spraying layer, and conduit is provided with denitration pump, and one-level rises gas liquid trap
It is connected through denitration grout recurrent canal with denitration catch box, slurry pool is connected through overflow pipe with desulfurization catch box, desulfurization collection
Liquid case is connected through conduit with two-grade desulfurizing spraying layer, and conduit is provided with desulfurization pump, desulfurization slurry recurrent canal one end and two level liter
Gas liquid trap is connected, and the other end is connected with slurry pool, and dedusting slurries recurrent canal one end rises gas liquid trap with three-level and is connected,
The other end is connected with dedusting catch box, and dedusting catch box rinses layer with high-efficiency dust remover through conduit and is connected, and conduit is provided with
Flushing pump.
Rough cleaner and high-efficiency dust remover described in the utility model are made up of at least three spiral-flow type water dust scrubbers, rotation
Streaming water dust scrubber is absorbing in shell and vertically fixed, described spiral-flow type water film dedusting in a manner of welding or assemble
Device is to be respectively equipped with turbulent flow blade and swirl vane in the inner tubal wall bottom of bobbin, and swirl vane is arranged on turbulent flow blade
Side, between the two away from for 100-200mm, turbulent flow blade is 70 ° -85 ° in horizontal sextant angle and is evenly distributed on tube wall, swirl vane
It is 15 ° -30 ° in horizontal sextant angle to be evenly distributed on tube wall, the pattern of turbulent flow blade and swirl vane is conventional fan-shaped leaf
Piece, its center-hole diameter, turbulent flow blade quantity, swirl vane quantity are by parameters such as exhaust gas volumn, spraying layer slurries amount, flue gas flow rates
Determine.Its outstanding advantage is the setting of turbulent flow blade, improves flue gas flow rate and is forming violent flue gas turbulent flow, grit and mist
The collision of fierceness occurs between drop and is condensed into the dust-laden droplet being relatively large in diameter, and because turbulent flow blade has certain inclination angle
Degree, forms certain centrifugal motion, makes droplet to aggregation at tube wall；The setting of swirl vane, make the flue gas with larger droplet
Acceleration is produced, forms violent centrifugal motion, dust-laden droplet is annihilated capture after being contacted with the moisture film of tube wall, so as to efficient
Eliminate the dust granules in flue gas.Rough cleaner can also be sufficiently mixed flue gas in addition to playing the role of to strengthen dust collection capacity,
Strengthen gas-liquid mass transfer, improve desulfuration efficiency.
One-level described in the utility model rises gas liquid trap, two level rises gas liquid trap, three-level liter gas liquid trap is catheter type
Rise gas liquid trap, catheter type rises gas liquid trap and sets dividing plate, conduit, dividing plate central point and periphery is convex, middle concave, dividing plate it is transversal
Face is in W types, and the same side of dividing plate is connected with absorption tower outer casing inner wall, and dividing plate is provided with guide hole, the periphery of conduit and guide hole
It is connected, absorption tower outer casing inner wall is divided into two independent chambers by dividing plate, and two chambers are connected through conduit, and guide hole conduit is
Bend pipe, the import of conduit（Under shed）And outlet（Upper shed）Axis be in 90 °, the import of conduit vertically downward, conduit outlet
Axially to be exported with conduit outlet in 40-55 ° of domatic, each conduit outlet axis and take-up in absorption tower are oblique, tilt
Angle is 50-70 °, flue gas is produced rotation.The dividing plate that catheter type is risen in gas liquid trap is isolated the slurries in upper and lower two region,
And make the smoke behaviors such as flue gas turbulization, eddy flow, fully optimize gas flowfield, so that desulphurization and denitration, dedusting region are relative
Work independently, enhance the clean-up effect in each region.
Demister described in the utility model can be tubular demister and deflection plate demister one of which, with common technology
Scheme is identical, and flue gas removes the droplet of larger particles after demister, so as to reduce the moisture loss on absorption tower, prevents pair
The corrosion of follow-up equipment.
Mist eliminator flushing layer described in the utility model is identical with common technology scheme, by spraying clean process water,
Discontinuity is rinsed for demister, prevents stopping state.
Denitration catch box described in the utility model, which is arranged on, to be absorbed outside shell, and denitration catch box can add oxidant and match somebody with somebody
Oxidizer slurry is put, the slurries after denitration pump spray return to denitration catch box by denitration grout recurrent canal, so as to surplus
Remaining oxidant is made full use of.
A kind of wet desulphurization denitration dust collecting technique, it is characterised in that flue gas is entered by gas approach, passes through rough dedusting successively
Device, first grade desulfurizing spraying layer, one-level rise gas liquid trap, denitration spraying layer, two level and rise gas liquid trap, two-grade desulfurizing spraying layer, three
Level rises gas liquid trap, high-efficiency dust remover, high-efficiency dust remover and arranged after rinsing layer, demister and mist eliminator flushing layer by exhaust pass
Go out, described first grade desulfurizing spraying layer and slurry pool form the independent circulatory system, and the advantage of the circulation is can be on a large scale
The acid degree of slurries in slurry pool is adjusted, for needing to force the limestone-gypsum method aoxidized, pH value is more low more is beneficial to oxygen
Change, but pH value as little as 4 just can not carry out desulfurization, and traditional sulfur method is to reach desulfurization and force the equilibrated ph value of oxidation generally to select
Select 5.5 or so, and this circulation pH value as little as 4 can be run when actual condition is badly in need of oxidation effect, disengagement section is by more
Efficient two-grade desulfurizing spraying layer is completed, so as to enhance adaptability of the system to all kinds of Desulfurizations；Described denitration
Spraying layer, one-level rise gas liquid trap and denitration catch box forms the independent circulatory system, and the advantage of the circulation is to realize solely
Vertical control denitration catch box slurries oxidant concentration, has isolated other different zones slurries of different nature, has made denitration catch box
Slurries keep stable chemical property and unaffected, fully ensured that the utilization ratio and using effect of oxidant, it is convenient
Reach the optimal method of operation；High-efficiency dust remover rinses layer, three-level rises gas liquid trap and dedusting catch box forms independent follow
Loop system, the advantage of the circulation are by independent loops, have isolated in system containing Solid content or the accessory substance that chemically reacts
Slurries, dedusting catch box slurries is departed from solidification cementing property, maintain the developing result close to water to greatest extent, the circulation
Also liquid holdup stable in flushing performance and high-efficiency dust remover compared with big yield is maintained, so as to which moisture film greatly improved
Efficiency of dust collection；First grade desulfurizing spraying layer, two-grade desulfurizing spraying layer, two level rise gas liquid trap and slurry tank, desulfurization catch box are formed
The circulatory system of intersection.The outstanding advantage of the cross circulating system is that whole sweetening process is connected as into an entirety, desulfurization collection
Alkaline slurries carry out desulfurization by two-grade desulfurizing spraying layer to flue gas in liquid case, and the slurries after desulfurization reach slurry pool, pass through
First grade desulfurizing spraying layer carries out desulfurization to flue gas again, takes full advantage of alkaline desulfurizing agent.Desulfurization catch box slurries and slurry pool
Slurries are relatively independent, and the acid-base property of desulfurization catch box slurries does not directly affect the acid-base property of slurry pool slurries, so as to form two
The pH value difference of kind slurries so that even if desulfurization catch box slurries are strong basicity slurries, slurries can also keep acid in slurry pool,
Such as desulfurization forces oxidation technology using limestone-gypsum, then the circulation, which has, can apply alkaline slurry high-efficiency desulfurization, and can
Acid slurries are kept to be beneficial to the advantage of oxidation, the adaptability with extensive sulfur removal technology.
First grade desulfurizing layer spraying layer described in the utility model is to take the faintly acid slurries in slurry pool to enter by slurries pumping
Row spray atomizing, described two-grade desulfurizing spraying layer are to take the alkaline slurry in desulfurization catch box to carry out spray mist by desulfurization pumping
Change, by spray atomizing twice, by most of SO in flue gas2 Absorbed, the application of alkaline slurry can increase substantially flue gas
Desulfurized effect.
Denitration spraying layer described in the utility model is to take entering containing oxidizer slurry in denitration catch box by denitration pumping
Row spray atomizing, oxidant can be sodium hypochlorite, chlorine dioxide, hydrogen peroxide, sodium chlorite etc..Denitration spraying layer is to oxidation
Agent slurries carry out independent circulation atomization, have fully ensured that effective utilization of oxidant, and strengthen denitration efficiency.
High-efficiency dust remover described in the utility model rinses layer and is arranged in above high-efficiency dust remover, is extracted and removed by flushing pump
Clean process water carries out cleaning showers to high-efficiency dust remover in dirt catch box, and provides sustainable cleaning for high-efficiency dust remover
Moisture film, further increase efficiency of dust collection.
Desulfurization catch box described in the utility model, which is arranged on, to be absorbed outside shell, and desulfurization catch box can add alkali from outside
Property desulfurizing agent, make slurries that there is alkalescence, spray desulfurization carried out by the desulfurization pump of setting, slurries after desulfurization return to absorption tower slurry
Liquid pool, and desulfurization catch box is returned to by overflow pipe.Desulfurization catch box effectively can enter water-filling to the flue gas in absorption tower
Envelope, and due in absorption tower slurries can only unidirectionally flow to desulfurization catch box, so slurries and absorption in desulfurization catch box
Tower slurry pool slurries separate, can separately adjustable acid-base value, the desulfurized effect to flue gas greatly improved.
The utility model in use, flue gas from absorb shell shell wall on gas approach enter into and up flowing, warp
When crossing the turbulent flow blade of rough cleaner, turbulent flow blade improves flue gas flow rate, and violent turbulent flow is formed in turbulent flow leaf area,
The collision and cohesion of fierceness occur between grit and droplet, while the length of turbulent region ensure that enough collisions and cohesion are empty
Between, after flue gas outflow turbulent flow leaf area, flow velocity reduces, and droplet is condensed into the dust-laden droplet being relatively large in diameter with grit.Due to rapids
Stream blade have certain angle of inclination, so flue gas can carry out pre-rotation when flowing through, form certain centrifugal motion, make droplet to
Assemble at tube wall；Flue gas with larger droplet produces acceleration when flowing through swirl vane, violent centrifugal motion is formed, containing cloud
Drop is annihilated capture after being contacted with the moisture film of tube wall.Flue gas is stripped of most of dust granules by dedusting region.
Flue gas flow to desulfurization zone after rough cleaner dedusting, and slurries pumping takes the faintly acid slurries in slurry pool,
Flue gas is washed by the atomization of first grade desulfurizing spraying layer, is stripped of most of SO2, the harmful substance such as fluoride, and be
Dedusting region provides stable liquid holdup.Flue gas after dust-removal and desulfurizing purifies, it can significantly reduce follow-up variousization
The side reaction in reaction is learned, so as to improve the effect in follow-up function region.
Flue gas enters denitration region domain behind desulfurization zone, and flue gas rises gas liquid trap by one-level, optimizes gas flowfield
And entering denitration region domain, denitration pumping takes the oxidizer slurry in denitration catch box, made by the spray atomizing of denitration spraying layer
Slurries and flue gas are fully contacted, and oxidative absorption is carried out to the NO in flue gas.Gas liquid collecting is risen by one-level by reacted slurries
Device is collected, and is returned to denitration catch box by denitration grout recurrent canal, has been fully ensured that the utilization ratio of oxidant, and passes through independence
The parameters such as denitration catch box slurries oxidant concentration, slurry spraying flow are controlled, required oxidative absorption efficiency are adjusted, to reach
The optimal method of operation.By the denitration region after optimization design, most of NO is oxidized to be absorbed flue gas, and denitration greatly improved
Efficiency.
Flue gas optimizes gas flowfield and enters high-efficiency desulfurization region, and flue gas rises gas liquid trap by two level, optimizes gas
Flow field simultaneously enters high-efficiency desulfurization region, and desulfurization pumping takes the alkaline slurry in desulfurization catch box, passes through two-grade desulfurizing spraying layer
Spray atomizing makes slurries and flue gas fully contact, and the sulfur dioxide in flue gas is absorbed.Pass through by reacted slurries
Two level rises gas liquid trap and collected, and returns to slurry pool by desulfurization slurry recurrent canal, it is de- that reacted slurries contain remaining alkalescence
Sulphur agent, continue to carry out desulfurization by spray atomizing in slurry pool, greatly ensure that the utilization ratio of alkaline desulfurizing agent.It is fully anti-
The slurries answered are in faintly acid, and desulfurization catch box is returned to by overflow pipe.Desulfurization catch box can be effectively in absorption tower
Flue gas carry out water seal, and due in absorption tower slurries can only unidirectionally flow to desulfurization catch box, so in desulfurization catch box
Slurries with absorb tower slurry pool slurries separate, can separately adjustable acid-base value, from outside persistently add alkaline desulfurizing agent, make desulfurization
Slurries in catch box keep certain alkalescence, and the desulfurized effect to flue gas can be greatly improved.After flue gas is by optimization design
High-efficiency desulfurization region, SO2Almost all is absorbed, while alkaline slurry also has good to remaining NOx in flue gas, harmful ion
Good removal effect.
Flue gas enters high-effective dust-removing region, and flue gas rises gas liquid trap by three-level, into high-efficiency dust remover, its dust-cleaning principle
Identical with first area, this is not repeated, and flushing pump extracts process water clean in dedusting catch box, is rinsed by high-efficiency dust remover
Layer carries out cleaning showers to high-efficiency dust remover, and the slurries after cleaning return to dedusting catch box by dedusting slurries recurrent canal.It is clean
Process water provide sustainable clean moisture film for high-efficiency dust remover, and be laid out by optimization design, rational flue gas flow rate etc.
Mode, further increase can chalk dust removing particle diameter scope, improve efficiency of dust collection.
Flue gas finally enters demisting region, and demister is tubular demister, or the demisting of deflection plate or other patterns
Device, demisting principle is same as the prior art, and this is not repeated.To prevent demister fouling, mist eliminator flushing layer is set to demister
Interruption flushing is carried out, flue gas is discharged into air after demister demisting by chimney.
The utility model has the advantages of：(1) realize flue gas desulfurization denitration dust-removing integrated, greatly reduce occupation of land
Area and cost of investment；(2) gas flowfield is optimized, improves gas-liquid mass transfer effect, compared with conventional desulfurization denitration dust collecting tower,
The height on absorption tower about 30% can be reduced；(3) technological process is optimized, desulfurizing agent, oxidant are single kind medicament and carried out
Make full use of, greatly reduce the operating cost of system；(4) desulphurization denitration good dedusting effect, liquid-gas ratio is low, and system energy consumption is few
Abrasion is few, reduces operation and maintenance cost；(6) rough cleaner and high-efficiency dust remover are provided with tower, improved in absorption tower
Portion can not set deduster outside tower under rational Inlet dust concentration, reduce investment and running cost to the capturing efficiency of dust
With；(5) device is applied widely, and reliability is high, and the desulfurization for being fully applicable to the Industrial Stoves of the operating modes such as low temperature, high humility takes off
Nitre dedusting；(6) rough cleaner and high-efficiency dust remover are set in tower, improved to the capturing efficiency of dust inside absorption tower, one
The outer deduster of tower can not be set under fixed Inlet dust concentration；(7) communication port space is big in tower, and resistance is small, no blocking risk, makes
Simply, it is easy to maintenance, possess higher cost performance.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the utility model embodiment 1.
Fig. 2 is a kind of spiral-flow type water dust scrubber structural representation of the present utility model.
Fig. 3 is that a kind of catheter type of the present utility model rises gas liquid trap structural representation.
Fig. 4 is that a kind of catheter type of the present utility model rises gas liquid trap top view.
Embodiment
The utility model is further elaborated below in conjunction with the accompanying drawings：
As illustrated, a kind of wet desulphurization denitration dust collecting device, including absorb shell, it is characterised in that absorb shell
Slurry pool 14, gas approach 1, rough cleaner 2, first grade desulfurizing spraying layer 3, one-level are inside sequentially provided with from down to up rises gas liquid trap
4th, denitration spraying layer 5, two level rise gas liquid trap 6, two-grade desulfurizing spraying layer 7, three-level and rise gas liquid trap 8, high-efficiency dust remover 9, height
Imitate deduster and rinse layer 10, demister 11 and mist eliminator flushing layer 12, wherein gas approach 1 is arranged on the shell wall for absorbing shell
On, absorb shell peripheral hardware and put slurries pump 18, overflow pipe 22, denitration catch box 15, denitration pump 20, denitration grout recurrent canal
23rd, desulfurization catch box 17, desulfurization pump 19, desulfurization slurry recurrent canal 24, dedusting catch box 16, flushing pump 21, dedusting slurries return
Pipe 25, wherein slurry pool are connected through conduit with first grade desulfurizing spraying layer, and conduit is provided with slurries pump, and denitration catch box is through conduit
It is connected with denitration spraying layer, conduit is provided with denitration pump, and one-level rises gas liquid trap through denitration grout recurrent canal and denitration liquid collecting
Case is connected, and slurry pool is connected through overflow pipe with desulfurization catch box, and desulfurization catch box is through conduit and two-grade desulfurizing spraying layer
It is connected, conduit is provided with desulfurization pump, and desulfurization slurry recurrent canal one end rises gas liquid trap with two level and is connected, the other end and slurries
Pond is connected, and dedusting slurries recurrent canal one end rises gas liquid trap with three-level and is connected, and the other end is connected with dedusting catch box, removes
Dirt catch box rinses layer with high-efficiency dust remover through conduit and is connected, and conduit is provided with flushing pump.
Rough cleaner 2 and high-efficiency dust remover 9 described in the utility model are made up of at least three spiral-flow type water dust scrubbers,
Spiral-flow type water dust scrubber is absorbing in shell and vertically fixed in a manner of welding or assemble, and described spiral-flow type moisture film removes
Dirt device is to be respectively equipped with turbulent flow blade and swirl vane in the inner tubal wall bottom of bobbin, and swirl vane is arranged on turbulent flow blade
Side, between the two away from for 100-200mm, turbulent flow blade is 70 ° -85 ° in horizontal sextant angle and is evenly distributed on tube wall, swirl vane
It is 15 ° -30 ° in horizontal sextant angle to be evenly distributed on tube wall, the pattern of turbulent flow blade and swirl vane is conventional fan-shaped leaf
Piece, its center-hole diameter, turbulent flow blade quantity, swirl vane quantity are by parameters such as exhaust gas volumn, spraying layer slurries amount, flue gas flow rates
Determine.Its outstanding advantage is the setting of turbulent flow blade, improves flue gas flow rate and is forming violent flue gas turbulent flow, grit and mist
The collision of fierceness occurs between drop and is condensed into the dust-laden droplet being relatively large in diameter, and because turbulent flow blade has certain inclination angle
Degree, forms certain centrifugal motion, makes droplet to aggregation at tube wall；The setting of swirl vane, make the flue gas with larger droplet
Acceleration is produced, forms violent centrifugal motion, dust-laden droplet is annihilated capture after being contacted with the moisture film of tube wall, so as to efficient
Eliminate the dust granules in flue gas.Rough cleaner can also be sufficiently mixed flue gas in addition to playing the role of to strengthen dust collection capacity,
Strengthen gas-liquid mass transfer, improve desulfuration efficiency.
One-level described in the utility model rises gas liquid trap, two level rises gas liquid trap, three-level liter gas liquid trap is catheter type
Rise gas liquid trap, catheter type rises gas liquid trap and sets dividing plate, conduit, dividing plate central point and periphery is convex, middle concave, dividing plate it is transversal
Face is in W types, and the same side of dividing plate is connected with absorption tower outer casing inner wall, and dividing plate is provided with guide hole, the periphery of conduit and guide hole
It is connected, absorption tower outer casing inner wall is divided into two independent chambers by dividing plate, and two chambers are connected through conduit, and guide hole conduit is
Bend pipe, the import of conduit（Under shed）And outlet（Upper shed）Axis be in 90 °, the import of conduit vertically downward, conduit outlet
Axially to be exported with conduit outlet in 40-55 ° of domatic, each conduit outlet axis and take-up in absorption tower are oblique, tilt
Angle is 50-70 °, flue gas is produced rotation.The dividing plate that catheter type is risen in gas liquid trap is isolated the slurries in upper and lower two region,
And make the smoke behaviors such as flue gas turbulization, eddy flow, fully optimize gas flowfield, so that desulphurization and denitration, dedusting region are relative
Work independently, enhance the clean-up effect in each region.
Demister described in the utility model can be tubular demister and deflection plate demister one of which, with common technology
Scheme is identical, and flue gas removes the droplet of larger particles after demister, so as to reduce the moisture loss on absorption tower, prevents pair
The corrosion of follow-up equipment.
Mist eliminator flushing layer described in the utility model is identical with common technology scheme, by spraying clean process water,
Discontinuity is rinsed for demister, prevents stopping state.
Denitration catch box described in the utility model, which is arranged on, to be absorbed outside shell, and denitration catch box can add oxidant and match somebody with somebody
Oxidizer slurry is put, the slurries after denitration pump spray return to denitration catch box by denitration grout recurrent canal, so as to surplus
Remaining oxidant is made full use of.
The utility model flue gas is entered by gas approach 1, successively by rough cleaner 2, first grade desulfurizing spraying layer 3, one-level
Rise gas liquid trap 4, denitration spraying layer 5, two level and rise gas liquid trap 6, two-grade desulfurizing spraying layer 7, three-level and rise gas liquid trap 8, efficiently
Deduster 9, high-efficiency dust remover are discharged after rinsing layer 10, demister 11 and mist eliminator flushing layer 12 by exhaust pass 13, described
First grade desulfurizing spraying layer 3 and slurry pool 14 form the independent circulatory system, and the advantage of the circulation is that slurry can be adjusted on a large scale
The acid degree of slurries in liquid pool, for needing to force the limestone-gypsum method aoxidized, pH value is more low more is beneficial to oxidation, but PH
Value as little as 4 just can not carry out desulfurization, and traditional sulfur method is to reach desulfurization and force the equilibrated ph value of oxidation to be usually chosen in 5.5
Left and right, and this circulation pH value as little as 4 can be run when actual condition is badly in need of oxidation effect, disengagement section is by more efficient two
Level desulfurization spraying layer is completed, so as to enhance adaptability of the system to all kinds of Desulfurizations；Described denitration spraying layer 5,
One-level rises gas liquid trap 4 and denitration catch box 15 forms the independent circulatory system, and the advantage of the circulation is to realize independent control
Denitration catch box slurries oxidant concentration processed, has isolated other different zones slurries of different nature, makes the slurry of denitration catch box
Liquid keeps stable chemical property and unaffected, has fully ensured that the utilization ratio and using effect of oxidant, has easily reached
To the optimal method of operation；High-efficiency dust remover rinses layer 10, three-level rises gas liquid trap 8 and dedusting catch box 16 forms independent follow
Loop system, the advantage of the circulation are by independent loops, have isolated in system containing Solid content or the accessory substance that chemically reacts
Slurries, dedusting catch box slurries is departed from solidification cementing property, maintain the developing result close to water to greatest extent, the circulation
Also liquid holdup stable in flushing performance and high-efficiency dust remover compared with big yield is maintained, so as to which moisture film greatly improved
Efficiency of dust collection；First grade desulfurizing spraying layer 3, two-grade desulfurizing spraying layer 7, two level rise gas liquid trap 6 and slurry tank 14, desulfurization catch box
17 form the circulatory system intersected.The outstanding advantage of the cross circulating system is that whole sweetening process is connected as into an entirety,
Alkaline slurries carry out desulfurization by two-grade desulfurizing spraying layer to flue gas in desulfurization catch box, and the slurries after desulfurization reach slurries
Pond, desulfurization is carried out to flue gas again by first grade desulfurizing spraying layer, takes full advantage of alkaline desulfurizing agent.Desulfurization catch box slurries and
Slurry pool slurries are relatively independent, and the acid-base property of desulfurization catch box slurries does not directly affect the acid-base property of slurry pool slurries, so as to shape
Into the pH value difference of two kinds of slurries so that even if desulfurization catch box slurries are strong basicity slurries, slurries can also be protected in slurry pool
Acidity is held, such as desulfurization forces oxidation technology using limestone-gypsum, then the circulation has and can efficiently taken off using alkaline slurry
Sulphur, and can keep acid slurries to be beneficial to the advantage aoxidized, the adaptability with extensive sulfur removal technology.
First grade desulfurizing layer spraying layer 3 described in the utility model is that the faintly acid extracted by slurries pump 18 in slurry pool 14 is starched
Liquid carries out spray atomizing, and described two-grade desulfurizing spraying layer 7 is that the alkaline slurry in desulfurization catch box 17 is extracted by desulfurization pump 19
Spray atomizing is carried out, by spray atomizing twice, by most of SO in flue gas2 Absorbed, the application of alkaline slurry can be significantly
Degree improves the desulfurized effect of flue gas.
Denitration spraying layer 5 described in the utility model is to extract being starched containing oxidant in denitration catch box 15 by denitration pump 20
Liquid carries out spray atomizing, and oxidant can be sodium hypochlorite, chlorine dioxide, hydrogen peroxide, sodium chlorite etc..Denitration spraying layer pair
Oxidizer slurry carries out independent circulation atomization, has fully ensured that effective utilization of oxidant, and strengthen denitration efficiency.
High-efficiency dust remover described in the utility model rinses layer 10 and is arranged in above high-efficiency dust remover, is taken out by flushing pump 21
Remove process water clean in dirt catch box 16 and cleaning showers are carried out to high-efficiency dust remover, and provide for high-efficiency dust remover sustainable
Clean moisture film, further increase efficiency of dust collection.
Desulfurization catch box described in the utility model, which is arranged on, to be absorbed outside shell, and desulfurization catch box can add alkali from outside
Property desulfurizing agent, make slurries that there is alkalescence, spray desulfurization carried out by the desulfurization pump of setting, slurries after desulfurization return to absorption tower slurry
Liquid pool, and desulfurization catch box is returned to by overflow pipe.Desulfurization catch box effectively can enter water-filling to the flue gas in absorption tower
Envelope, and due in absorption tower slurries can only unidirectionally flow to desulfurization catch box, so slurries and absorption in desulfurization catch box
Tower slurry pool slurries separate, can separately adjustable acid-base value, the desulfurized effect to flue gas greatly improved.
The utility model in use, flue gas from absorb shell shell wall on gas approach enter into and up flowing, warp
When crossing the turbulent flow blade of rough cleaner, turbulent flow blade improves flue gas flow rate, and violent turbulent flow is formed in turbulent flow leaf area,
The collision and cohesion of fierceness occur between grit and droplet, while the length of turbulent region ensure that enough collisions and cohesion are empty
Between, after flue gas outflow turbulent flow leaf area, flow velocity reduces, and droplet is condensed into the dust-laden droplet being relatively large in diameter with grit.Due to rapids
Stream blade have certain angle of inclination, so flue gas can carry out pre-rotation when flowing through, form certain centrifugal motion, make droplet to
Assemble at tube wall；Flue gas with larger droplet produces acceleration when flowing through swirl vane, violent centrifugal motion is formed, containing cloud
Drop is annihilated capture after being contacted with the moisture film of tube wall.Flue gas is stripped of most of dust granules by dedusting region.
Flue gas flow to desulfurization zone after rough cleaner dedusting, and slurries pumping takes the faintly acid slurries in slurry pool,
Flue gas is washed by the atomization of first grade desulfurizing spraying layer, is stripped of most of SO2, the harmful substance such as fluoride, and be
Dedusting region provides stable liquid holdup.Flue gas after dust-removal and desulfurizing purifies, it can significantly reduce follow-up variousization
The side reaction in reaction is learned, so as to improve the effect in follow-up function region.
Flue gas enters denitration region domain behind desulfurization zone, and flue gas rises gas liquid trap by one-level, optimizes gas flowfield
And entering denitration region domain, denitration pumping takes the oxidizer slurry in denitration catch box, made by the spray atomizing of denitration spraying layer
Slurries and flue gas are fully contacted, and oxidative absorption is carried out to the NO in flue gas.Gas liquid collecting is risen by one-level by reacted slurries
Device is collected, and is returned to denitration catch box by denitration grout recurrent canal, has been fully ensured that the utilization ratio of oxidant, and passes through independence
The parameters such as denitration catch box slurries oxidant concentration, slurry spraying flow are controlled, required oxidative absorption efficiency are adjusted, to reach
The optimal method of operation.By the denitration region after optimization design, most of NO is oxidized to be absorbed flue gas, and denitration greatly improved
Efficiency.
Flue gas optimizes gas flowfield and enters high-efficiency desulfurization region, and flue gas rises gas liquid trap by two level, optimizes gas
Flow field simultaneously enters high-efficiency desulfurization region, and desulfurization pumping takes the alkaline slurry in desulfurization catch box, passes through two-grade desulfurizing spraying layer
Spray atomizing makes slurries and flue gas fully contact, and the sulfur dioxide in flue gas is absorbed.Pass through by reacted slurries
Two level rises gas liquid trap and collected, and returns to slurry pool by desulfurization slurry recurrent canal, it is de- that reacted slurries contain remaining alkalescence
Sulphur agent, continue to carry out desulfurization by spray atomizing in slurry pool, greatly ensure that the utilization ratio of alkaline desulfurizing agent.It is fully anti-
The slurries answered are in faintly acid, and desulfurization catch box is returned to by overflow pipe.Desulfurization catch box can be effectively in absorption tower
Flue gas carry out water seal, and due in absorption tower slurries can only unidirectionally flow to desulfurization catch box, so in desulfurization catch box
Slurries with absorb tower slurry pool slurries separate, can separately adjustable acid-base value, from outside persistently add alkaline desulfurizing agent, make desulfurization
Slurries in catch box keep certain alkalescence, and the desulfurized effect to flue gas can be greatly improved.After flue gas is by optimization design
High-efficiency desulfurization region, SO2Almost all is absorbed, while alkaline slurry is to remaining a small amount of NOx, harmful ion in flue gas
There is good removal effect.
Flue gas enters high-effective dust-removing region, and flue gas rises gas liquid trap by three-level, into high-efficiency dust remover, its dust-cleaning principle
Identical with first area, this is not repeated, and flushing pump extracts process water clean in dedusting catch box, is rinsed by high-efficiency dust remover
Layer carries out cleaning showers to high-efficiency dust remover, and the slurries after cleaning return to dedusting catch box by dedusting slurries recurrent canal.It is clean
Process water provide sustainable clean moisture film for high-efficiency dust remover, and be laid out by optimization design, rational flue gas flow rate etc.
Mode, further increase can chalk dust removing particle diameter scope, improve efficiency of dust collection.
Flue gas finally enters demisting region, and demister is tubular demister, or the demisting of deflection plate or other patterns
Device, demisting principle is same as the prior art, and this is not repeated.To prevent demister fouling, mist eliminator flushing layer is set to demister
Interruption flushing is carried out, flue gas is discharged into air after demister demisting by chimney.
The utility model has the advantages of：(1) realize flue gas desulfurization denitration dust-removing integrated, greatly reduce occupation of land
Area and cost of investment；(2) gas flowfield is optimized, improves gas-liquid mass transfer effect, compared with conventional desulfurization denitration dust collecting tower,
The height on absorption tower about 30% can be reduced；(3) technological process is optimized, desulfurizing agent, oxidant are single kind medicament and carried out
Make full use of, greatly reduce the operating cost of system；(4) desulphurization denitration good dedusting effect, liquid-gas ratio is low, and system energy consumption is few
Abrasion is few, reduces operation and maintenance cost；(6) rough cleaner and high-efficiency dust remover are provided with tower, improved in absorption tower
Portion can not set deduster outside tower under rational Inlet dust concentration, reduce investment and running cost to the capturing efficiency of dust
With；(5) device is applied widely, and reliability is high, and the desulfurization for being fully applicable to the Industrial Stoves of the operating modes such as low temperature, high humility takes off
Nitre dedusting；(6) rough cleaner and high-efficiency dust remover are set in tower, improved to the capturing efficiency of dust inside absorption tower, one
The outer deduster of tower can not be set under fixed Inlet dust concentration；(7) communication port space is big in tower, and resistance is small, no blocking risk, makes
Simply, it is easy to maintenance, possess higher cost performance.
Embodiment 1：
As shown in figure 1, certain 130t CFBB Gas Parameters is：Mark condition exhaust gas volumn 180000Nm3/h, entrance cigarette
Temperature degree is 140 DEG C, and butt sulfur dioxide concentration is 3000mg/ Nm3, and butt nitrous oxides concentration is 400mg/ Nm3, through cloth
Butt dust concentration is 50 mg/ Nm3 after bag dust collector, oxygen content 11%.
It is 5.4m that design, which absorbs tower diameter, and superficial gas flow velocity be 3.36m/s in tower, and the conduit quantity of liter gas liquid trap is 16
Root, caliber 450mm, the dust removing tube number of deduster is 85, caliber 450mm, uses sodium chlorite as oxidant, hydroxide
Sodium is alkaline absorbent.Desulfuration efficiency is more than 99.5% after testing, and denitration oxidation efficiency is more than 87%, butt dust concentration after dedusting
Less than 5mg/ Nm3, meet emission request.
Preferred embodiment of the present utility model is the foregoing is only, but embodiment and accompanying drawing are not for limiting this practicality
It is new, it is any to be familiar with this those skilled in the art, do not departing from spirit and scope of the present utility model, any modification for being made, equally replacing
Change, improve, should be included within the scope of protection of the utility model.
Claims (4)
1. a kind of wet desulphurization denitration dust collecting device, including absorb shell, it is characterised in that absorb in shell from down to up
It is sequentially provided with slurry pool, gas approach, rough cleaner, first grade desulfurizing spraying layer, one-level and rises gas liquid trap, denitration spraying layer, two
Level rises gas liquid trap, two-grade desulfurizing spraying layer, three-level and rises gas liquid trap, high-efficiency dust remover, high-efficiency dust remover flushing layer, demister
With mist eliminator flushing layer, wherein gas approach is arranged on the shell wall for absorbing shell, is absorbed shell peripheral hardware and is put slurries pump, overflows
Flow tube road, denitration catch box, denitration pump, denitration grout recurrent canal, desulfurization catch box, desulfurization pump, desulfurization slurry recurrent canal, dedusting
Catch box, flushing pump, dedusting slurries recurrent canal, wherein slurry pool are connected through conduit with first grade desulfurizing spraying layer, are set on conduit
There is slurries pump, denitration catch box is connected through conduit with denitration spraying layer, and conduit is provided with denitration pump, and one-level rises gas liquid trap warp
Denitration grout recurrent canal is connected with denitration catch box, and slurry pool is connected through overflow pipe with desulfurization catch box, desulfurization liquid collecting
Case is connected through conduit with two-grade desulfurizing spraying layer, and conduit is provided with desulfurization pump, and desulfurization slurry recurrent canal one end rises gas with two level
Liquid trap is connected, and the other end is connected with slurry pool, and dedusting slurries recurrent canal one end rises gas liquid trap with three-level and is connected, separately
One end is connected with dedusting catch box, and dedusting catch box rinses layer with high-efficiency dust remover through conduit and is connected, and conduit is provided with punching
Wash pump.
2. a kind of wet desulphurization denitration dust collecting device according to claim 1, it is characterised in that rough cleaner and efficiently remove
Dirt device is made up of at least three spiral-flow type water dust scrubbers, and spiral-flow type water dust scrubber is in a manner of welding or assemble on absorption tower
Fix in shell and vertically, described spiral-flow type water dust scrubber is to be respectively equipped with turbulent flow blade in the inner tubal wall bottom of bobbin
And swirl vane, swirl vane are arranged on above turbulent flow blade, between the two away from being in horizontal sextant angle for 100-200mm, turbulent flow blade
It is evenly distributed in for 70 ° -85 ° on tube wall, swirl vane is 15 ° -30 ° in horizontal sextant angle and is evenly distributed on tube wall.
3. a kind of wet desulphurization denitration dust collecting device according to claim 1, it is characterised in that one-level rises gas liquid trap, two
Level rises gas liquid trap, three-level rises gas liquid trap and rises gas liquid trap for catheter type, and catheter type rises gas liquid trap and sets dividing plate, conduit,
Dividing plate central point and periphery is convex, middle concave, the cross section of dividing plate is in W types, and the same side of dividing plate is connected with absorption tower outer casing inner wall
Connect, dividing plate is provided with guide hole, and the periphery of conduit is connected with guide hole, and absorption tower outer casing inner wall is divided into two independences by dividing plate
Chamber, two chambers are connected through conduit, and guide hole conduit is bend pipe, and the axis of the inlet and outlet of conduit is in 90 °, conduit
Vertically downward, conduit outlet is axially to be exported with conduit outlet in 40-55 ° of domatic, and each conduit outlet axis is with absorbing for import
Take-up is oblique in tower, and inclination angle is 50-70 °.
4. a kind of wet desulphurization denitration dust collecting device according to claim 1, it is characterised in that demister is tubular type demisting
One kind in device or deflection plate demister.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237670A (en) * | 2019-06-27 | 2019-09-17 | 成都海成环保工程有限公司 | It is a kind of to use Dual alkali circulation desulfurization system and its sulfur removal technology |
| CN110500603A (en) * | 2019-08-22 | 2019-11-26 | 山东郓城正华玻璃科技有限公司 | A kind of glass factory's exhaust gas denitration method |
| CN111672287A (en) * | 2020-06-28 | 2020-09-18 | 潮州市中乾环境科技有限公司 | Waste gas recovery system capable of reducing condensate |
| CN114699869A (en) * | 2022-06-01 | 2022-07-05 | 中航超能(苏州)科技有限公司 | Desulfurizing tower air current distribution device with air purification effect |
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2017
- 2017-07-11 CN CN201720836286.6U patent/CN206965497U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237670A (en) * | 2019-06-27 | 2019-09-17 | 成都海成环保工程有限公司 | It is a kind of to use Dual alkali circulation desulfurization system and its sulfur removal technology |
| CN110237670B (en) * | 2019-06-27 | 2021-06-18 | 成都海成环保工程有限公司 | Circulating desulfurization system adopting double-alkali method and desulfurization process thereof |
| CN110500603A (en) * | 2019-08-22 | 2019-11-26 | 山东郓城正华玻璃科技有限公司 | A kind of glass factory's exhaust gas denitration method |
| CN111672287A (en) * | 2020-06-28 | 2020-09-18 | 潮州市中乾环境科技有限公司 | Waste gas recovery system capable of reducing condensate |
| CN114699869A (en) * | 2022-06-01 | 2022-07-05 | 中航超能(苏州)科技有限公司 | Desulfurizing tower air current distribution device with air purification effect |
| CN114699869B (en) * | 2022-06-01 | 2022-08-26 | 中航超能(苏州)科技有限公司 | Desulfurizing tower air current distribution device with air purification effect |
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