CN205386407U - Wet flue gas desulfurization's tympanic bulla tower carries out - Google Patents
Wet flue gas desulfurization's tympanic bulla tower carries out Download PDFInfo
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- CN205386407U CN205386407U CN201521049789.6U CN201521049789U CN205386407U CN 205386407 U CN205386407 U CN 205386407U CN 201521049789 U CN201521049789 U CN 201521049789U CN 205386407 U CN205386407 U CN 205386407U
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- 239000003546 flue gas Substances 0.000 title claims abstract description 60
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000006477 desulfuration reaction Methods 0.000 title abstract description 47
- 230000023556 desulfurization Effects 0.000 title abstract description 23
- 241000197194 Bulla Species 0.000 title abstract 13
- 208000002352 blister Diseases 0.000 title abstract 13
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- 238000011010 flushing procedure Methods 0.000 claims abstract description 5
- 230000005587 bubbling Effects 0.000 claims description 70
- 239000007789 gas Substances 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 23
- 238000005507 spraying Methods 0.000 claims description 14
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 206010000269 abscess Diseases 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 17
- 239000007921 spray Substances 0.000 abstract description 17
- 235000019504 cigarettes Nutrition 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 description 35
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- 238000003756 stirring Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000003009 desulfurizing effect Effects 0.000 description 7
- 238000007667 floating Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 3
- 235000010261 calcium sulphite Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a wet flue gas desulfurization's tympanic bulla tower carries out, the tympanic bulla tower includes the absorption tower, is equipped with tympanic bulla mechanism in the absorption tower, the external entry flue of tympanic bulla mechanism, entry set gradually the humidification along flue gas flow in the flue and spray the mechanism and remove dust the mechanism in advance, tympanic bulla mechanism include by last baffle, down baffle and absorption tower inner wall enclose seal into yan qu, seal into the cigarette district intercommunication flue that enters the mouth, a plurality of vertical tympanic bulla pipes of arranging, the upper end of all tympanic bullas pipe run through down the baffle and advance cigarette district intercommunication, the lower extreme stretches into in the tower cauldron, a plurality of vertical blast pipes of arranging, all blast pipes run through the baffle manages -Offset with lower baffle and with the tympanic bulla, wash the pipe network, set up in entering the cigarette district and lie in the entry top of tympanic bulla pipe, this flushing pipe sets up a plurality of atomizing nozzle on the net. The utility model is used for carry out wet flue gas desulfurization to the flue gas, mainly solved the easy scale deposit of tympanic bulla pipe of current tympanic bulla tower and blockked up the technical problem who influences the normal operating of tympanic bulla tower.
Description
Technical field
This utility model relates to flue gas desulfurization technique field, is specifically related to a kind of device utilizing bubble tower to carry out wet process of FGD.
Background technology
Flue gas desulfurization technique can be divided into wet method, dry method, semidry method three kinds, and wherein Wet Flue Gas Desulfurization Technique has become main flue gas desulfurization.At present, the desulfurizing tower that domestic and international coal-burning power plant is conventional, mainly there are spray apertures tower, packed tower etc..
Application number be 200720309256.6 Chinese utility model patent disclose a kind of flue gas desulphurization system, desulfurizing tower adopts bubble tower, at gas cooler place, device is transformed, it is provided with fresh water (FW) moisturizing spraying layer, accident cool water shower layer and gas cooler spraying layer from top to bottom, utilize lime stone slurry that flue gas carries out cooling and pre-desulfurization outside bubble tower by regulating the mode of sprayed slurry, thus reducing the desulfuration efficiency of whole system；Application number be 200810226157.0 Chinese invention patent disclose bubble tower as desulfurizer and application thereof, using red mud as absorbent, adopt the mode that spray, bubbling combine that the sour gas in dusty gas is removed.Sour gas enters from tower body top, and the air vent connected from tower body middle and lower part with tower body sidewall after spray, bubbling is discharged.
Bubble tower has the advantage that perforation gas flow rate is high, gas-to-liquid contact is abundant, desulfuration efficiency is high.But the application of bubble tower can not get large-scale popularization and application is primarily present following shortcoming: 1. when bubble tower is as desulfurizer always, undersaturated heat smoke is from bubble holes through when contacting with desulfurization slurry, easily form dry and wet interface blocking bubbling pipe, causing that system cannot be properly functioning, bubble tower desulfurizer outage rate is high；2. the dust concentration of flue gas is required higher by bubbling pipe, higher dust can progressively stick to inside bubbling pipe after entering from bubbling pipe, and along with the increase of system operation time, flue gas area of passage is gradually reduced, desulfurizer resistance steeply rises, and blower fan and boiler are caused bigger potential safety hazard；3. bubble tower is different from spray column, and its reaction zone is at bubble level, and acidic flue gas reduces rapidly the pH of bubble level region serosity with desulfurizer slurry after bubble level reacts, and tower reactor solution can not mix rapidly, and bubble level desulfuration efficiency cannot be continual and steady；4. the thickness effect of the desulfuration efficiency of bubble tower and bubble level is relatively big, when boiler load change cause that exhaust gas volumn changes time, bubble level also can change therewith, and tradition bubble tower is difficult to ensure desulfuration efficiency when exhaust gas volumn changes.
Utility model content
For the problems referred to above, this utility model provides a kind of bubble tower carrying out wet process of FGD, and the easy fouling and clogging of bubbling pipe mainly solving existing bubble tower affects the technical problem that bubble tower is properly functioning.
A kind of bubble tower carrying out wet process of FGD, the absorption tower of exhanst gas outlet is set including top, demister, bubbling mechanism and tower reactor from top to bottom it is followed successively by described absorption tower, the external gas approach of described bubbling mechanism, set gradually humidification spraying mechanism and pre-dedusting mechanism in described gas approach along flue gas flow direction, described bubbling mechanism includes:
Being fixed on the upper spacer on the inwall of absorption tower and lower clapboard, the closing cavity that this upper spacer, lower clapboard and absorption tower inwall surround is Jin Yan district, and described gas approach is connected with this Jin Yan district；
The bubbling pipe of some vertical layouts, the upper end of all bubbling pipes runs through that lower clapboard connects with Jin Yan district, lower end is stretched in tower reactor；
The exhaustor of some vertical layouts, all exhaustors run through upper spacer and lower clapboard and arrange with bubbling pipe dislocation；
Rinse pipe network, be arranged in Jin Yan district and be positioned at the entrance top of described bubbling pipe, this flushing pipe network arranges some atomizers.
Problem for the easy fouling and clogging of bubbling pipe of existing bubble tower, in order to prevent high-temperature flue gas and serosity from forming dry and wet interface blocking bubble holes, Inlet dust blocking bubbling pipe inwall at bubble holes place, this utility model arranges humidification spray district (installing humidification spraying mechanism) at gas approach and inlet flue gas is lowered the temperature, is humidified, and arranges pre-dedusting area (installing pre-dedusting mechanism) and the flue gas after humidifying cooling is carried out pre-dedusting；Rinse spray is set up in the air inlet area of bubbling mechanism, flue gas is lowered the temperature further dedusting by spray liquid in air inlet area, form liquid film one layer stable at bubbling pipe inwall simultaneously, stop the dust adhesion generation in bubbling pipe inwall situation, flue gas volume after cooling declines simultaneously, reduce the perforation gas speed of flue gas, increase gas-liquid contact time, improve the desulfuration efficiency of bubble tower.
Preferably, described flushing pipe network is made up of the some wash tub pipes being evenly arranged, and is uniformly arranged several atomizers below every wash tub pipe, and the injection direction of atomizer is down.This utility model sets the some wash tub pipes being evenly arranged above bubbling pipe, water droplet after atomization is lowered the temperature further and is flowed under the influence of gravity into bubble level through bubbling pipe inwall after dedusting entering cigarette, and forming liquid film one layer stable at bubbling pipe inwall, it is prevented that dust adhesion bubbling pipe inwall causes blocking.Wash tub pipe liquid-gas ratio is 0.5-2L/Nm3。
Preferably, described humidification spraying mechanism includes 2～3 layers of shower, every layer of shower being radially arranged along gas approach.
Described shower is uniformly arranged nozzle.The reverse flue gas flow direction of injection direction of nozzle.
Preferably, described pre-dedusting mechanism is folded sheet shape demister, folded sheet shape demister be arranged below collecting tank, described sump bottom by pipeline connection in described tower reactor.Collecting tank is preferably and protrudes below to flue and be integrated the vertebral body closing cavity of mechanism with flue, and it is 30-60 degree that vertebral body closes the angle of cavity outer wall and horizontal plane.
Preferably, described gas approach arranges humidification spraying mechanism section and is inclined upwardly 10-20 degree relative to arranging pre-dedusting mechanism section.Prevent serosity from flowing backwards, deposit.
Solving on the basis of the easy fouling and clogging problem of bubbling pipe, for further enhancing the desulfuration efficiency of bubble tower, preferably, on the tube wall of described bubbling pipe and distance 20-500mm place, bubbling pipe bottom offers some bubble holes, the aperture of described bubble holes is 20-30mm, and the spacing between adjacent drum abscess is 5-30mm.Flue gas is bloated by bubble holes, make bubble can more uniformly with absorb slurry liquid contacts.It is further preferred that the tube wall of bubbling pipe is offered two row's bubble holes.
For further stably desulphurizing efficiency, it is preferable that be additionally provided with the porous cowling panel being positioned at above described bubble holes, the perforate of described porous cowling panel includes bubbling pipe through hole and air-flow traverse hole.Described porous cowling panel is horizontally installed on the inwall of absorption tower.
It is further preferred that the aperture in described porous cowling panel overdraught traverse hole is 15-45mm, air-flow is 20%-40% through the percent opening in hole, the height of porous cowling panel distance bubble holes is 30-100mm.Highly refer to that distance goes up the height at row's bubble holes center most herein.
Flue gas carries out blistering reaction through the bubble holes entrance bubble level of bubbling pipe with desulfurization slurry, flue gas bubble after perforation is through bubble level, centre is set in the middle part of bubble level and has the cowling panel of some apertures, flue gas bubble when through cowling panel is rectified the aperture in plate and crushes, being greatly improved gas liquid interfacial area, the sulfur dioxide in flue gas is desulfurized serosity efficient absorption.
During with bubble tower for desulfurizer, flue gas enters after serosity through bubbling pipe, forms substantial amounts of air pocket, crushes suddenly after floating to liquid level, cause liquid level to produce relatively macrorelief in serosity.The bubble holes positional distance liquid level of bubbling pipe own is less, bigger liquid level rises and falls and easily causes bubble holes place pressure inequality, and air flow method is uneven, further makes liquid level produce bigger fluctuating, the two influences each other, and ultimately causes the desulfuration efficiency of desulphurization system, efficiency of dust collection all relatively low.Therefore for solving this problem, this utility model sets up orifice plate above bubbling pipe, bubble floating process is subject to orifice plate and intercepts, air pocket is fractured into minute bubbles, and air-flow is redistributed, and finely dispersed minute bubbles float to liquid level through orifice plate, increase gas liquid interfacial area and improve desulfuration efficiency, liquid level is realized voltage stabilizing, it is prevented that liquid fluctuating is excessive simultaneously, affect stablizing of bubble tower running resistance and desulfuration efficiency.
For further enhance bubble with absorb serosity contact homogeneity, stably desulphurizing efficiency, it is preferable that described porous cowling panel is provided above the pulp-inlet pipe net of external absorption liquid transfer pipeline, and described pulp-inlet pipe is uniformly offered serosity hole.The opening in serosity hole is towards pulp-inlet pipe side off the net, it is ensured that slurry is entered uniformly in bubble level cross section, it is prevented that bubble level pH value is too low.
This utility model arranges some slurry inlet pipes in the middle part of bubble level, some serosity holes are uniformly set below every slurry inlet pipe, desulfurizer slurry is through serosity hole even into bubble level cross section everywhere, prevent bubble level slurry pH value difference bigger, aperture, serosity hole is 10-25mm, and the perforation flow velocity of serosity is 5-8m/s.
It is further preferred that be additionally provided with the air pipe network being positioned at tower reactor, the described external oxidation fan of air pipe network.It is preferred that, air pipe network is made up of the some air hoses being evenly arranged, and air hose uniformly sets out pore.
This utility model sets up oxidation air reaction zone below bubble level, the sulphite that the reaction of timely oxidation sweetening generates, it is prevented that the relatively calcium sulfite parcel sorbent particle of low solubility, keeps the activity of desulfurizing agent.
Preferably, arranging outer circulation pump outside absorption tower, the stock inlet of described outer circulation pump connection tower reactor top, the grout outlet of described outer circulation pump is connected with the serosity shower nozzle being arranged in tower reactor bottom.It is further preferred that described air pipe network is arranged between the stock inlet connectivity part of outer circulation pump and serosity shower nozzle.
Outer circulation pump is set outside tower reactor, is internally formed pulse suspension district in tower reactor, it is ensured that in tower reactor, serosity mixes rapidly, stablize the pH value of tower reactor serosity.
Preferably, being additionally provided with for regulating the overflow mechanism of liquid level in tower reactor outside described absorption tower, the entrance of this overflow mechanism connects with bottom tower reactor.
It is further preferred that described overflow mechanism includes:
Overflow launder, this isopipe root is communicated to bottom tower reactor；
Baffle plate adjusting device, in order to regulate the liquid level in overflow launder.
It is further preferred that the entrance and exit of overflow launder is all opened in bottom land, by inserting from bottom land and the adjustable baffle plate of height of baffle plate separates between entrance and exit, baffle plate side is feed zone, and opposite side is discharge zone, and the entrance of overflow launder is communicated to bottom tower reactor.
Overflow mechanism entrance is positioned at the bottom of bubble tower tower reactor, and tower reactor serosity enters slurry from ullage, discharges, be conducive to the control to absorbed layer slurry pH value, it is ensured that desulfuration efficiency bottom tower reactor.Baffle plate adjusting device, the height of controllable register Altitude control reaction zone bubble level are set at the top of overflow mechanism, when inlet flue gas quantitative change is big, sulfur dioxide concentration raises, suitably raise height of baffle plate, increase bubble level thickness and ensure desulfuration efficiency；When inlet flue gas amount diminish, sulfur dioxide concentration reduce time, suitably reduce height of baffle plate, reduce bubble level thickness and can meet desulfuration efficiency, reduce SR and save the energy consumption of blower fan.
This utility model arranges scalable overflow mechanism, when inlet flue gas amount and flue gas concentration change, by the Altitude control tower reactor liquid level of controllable register, it is ensured that stablizing of desulfuration efficiency and running resistance, the desulfurization slurry after reacting completely is gone out outside tower by overflow bottom absorption tower；Arranging desulfurizer slurry entrance in bubble level district, desulfurizing agent passes through the form of pipe network to the uniform cloth liquid in bubble level region, it is ensured that bubble level pH value obtains uniformly.
This utility model bubble tower carries out the method for wet process of FGD, comprises the steps:
Flue gas sends into Nei Jinyan district, absorption tower after being sequentially carried out spray humidification and pre-dedusting in gas approach, the flue gas entered in Jin Yan district is entered in the desulfurization slurry in tower reactor by bubbling pipe, form bubble, react with absorbing slurry liquid contacts, reacted bubble floating forms air-flow after crushing to liquid level, air-flow rises through exhaustor, then carries out obtaining neat stress after mist dedusting, and neat stress is gone out by absorbing tower top row；Rinse pipe network and bubbling pipe inwall is carried out spray washing；The oxidized rear discharge of serosity in tower reactor.
Preferably, the liquid-gas ratio rinsing pipe network spray washing is 0.5-2L/Nm3。
Preferred method, comprises the steps:
Flue gas initially enters bubble tower Nei Jinyan district after being sequentially carried out spray humidification and pre-dedusting in gas approach, enter back into bubbling pipe, desulfurization slurry is entered from bubble holes via bubbling pipe, form bubble, bubble floating, be subject to porous cowling panel and intercept, air pocket is fractured into minute bubbles, air-flow is redistributed, and finely dispersed minute bubbles float to liquid level through porous cowling panel, broken；The air-flow that bubble breaking is formed continues to rise, and through exhaustor, through demister, forms clean flue gas and is discharged by exhanst gas outlet.
Bubble floating process contacts with desulfurization slurry, and sulfur dioxide in flue gas, dust etc. enter desulfurization slurry, complete absorption process.Fresh slurry enters bubble tower by injection point, regulates desulfurization slurry pH value in bubble tower, and under suitable pH value, through the stirring of tower reactor side and oxidation wind action, the calcium sulfite that sulfur dioxide absorption is formed is aoxidized, crystallized, forms Gypsum Fibrosum.Desulfurization slurry after having reacted is discharged from bubble tower bottom slurry hole, enters aftertreatment systems.
This utility model sets up humidification spraying mechanism and pre-dedusting mechanism in gas approach, in bubbling mechanism, bubbling pipe inwall is carried out the flushing pipe network of spray washing simultaneously, prevent high-temperature flue gas and serosity from forming dry and wet interface blocking bubble holes, Inlet dust blocking bubbling pipe inwall at bubble holes place, increase gas-liquid contact time simultaneously, improve the desulfuration efficiency of bubble tower；Set up cowling panel at bubble level, increase gas liquid interfacial area and improve desulfuration efficiency, liquid level is realized voltage stabilizing, it is ensured that stablizing of desulfuration efficiency simultaneously；Oxidation air reaction zone is set up below bubble level, the sulphite that the reaction of timely oxidation sweetening generates, keep the activity of desulfurizing agent；Inside tower reactor, set up pulse suspension district, it is ensured that in tower reactor, serosity mixes rapidly, stablize the pH value of tower reactor serosity；Scalable overflow mechanism is set bottom tower reactor, regulates bubble level height according to flue gas flow；In bubble level district, desulfurizer slurry entrance is set, desulfurizing agent by the form of pipe network to the uniform cloth liquid in bubble level region, it is ensured that bubble level pH value uniform.
Below respectively set up between parts and mutually work in coordination with, solve existing bubble tower bubbling pipe easy fouling and clogging problem be maintained with stable desulfuration efficiency, this utility model under synergism, compared with prior art has the advantages that between above-mentioned each improvement
(1) set humidification spray and pre-dedusting device at gas approach, inlet flue gas is carried out humidifying cooling, effectively solves the problem that the unsaturated flue gas of high temperature goes out to be formed dry and wet interface blocking bubble holes at bubble holes, it is ensured that system stable operation.
(2) setting pre-dedusting device at gas approach, inlet flue gas dust concentration is greatly reduced, in effective solution flue gas, dust adhesion bubbling pipe inwall causes the blockage problem of bubbling pipe.
(3) some wash tub pipes are set in air inlet area flue gas is carried out cooling further, dedusting, form the anti-dust of stopping of liquid film one layer stable at bubbling pipe inwall to be enriched with at bubbling pipe inwall, and reduce flue gas flow rate increase bubble level gas-liquid contact time, improve desulfuration efficiency.
(4) it is provided above cowling panel at bubble holes, it is prevented that the liquid level fluctuation that bubble level causes because flue gas pressures is uneven causes local liquid level difference excessive, causes that local bubble holes gas speed is excessive causes desulfuration efficiency unstable；Rising bubble in bubble level is crushed by some apertures in cowling panel further, increases gas liquid interfacial area, improves bubble level desulfuration efficiency.
(5) adopt pipe network for slurry form, it is achieved the desulfurizer slurry entering bubble level is uniformly distributed in bubble level, it is ensured that bubble level region serosity is homogeneous, desulfuration efficiency is stable.Effectively solve bubble tower bubble level slurry pH value unmanageable problem on the low side.
(6) arranging the entrance of overflow mechanism bottom bubble tower, whole bubble tower region serosity enters bottom and flows out from top, is conducive to the control to bubble level pH value.At overflow mechanism top, baffle plate adjusting device is set, according to the change of inlet flue gas amount and sulfur dioxide concentration change, bubble level thickness can be adjusted, subject range that flue gas condition changed by bubble tower is greatly improved, reduce the operation energy consumption of bubble tower, solve bubble tower and do not adapt to a difficult problem for flue gas load change.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model bubble tower.
Fig. 2 is the structural representation (in figure, arrow show gas flow) of bubbling mechanism section parts.
Fig. 3 is upper spacer top view.
Fig. 4 is lower clapboard top view.
Accompanying drawing labelling shown in figure is as follows:
1-absorption tower 2-gas approach 3-is humidified spraying mechanism
41-pre-duster 42-collecting tank 5-demister
61-upper spacer 62-Jin Yan district 63-exhaustor
64-bubbling pipe 65-bubble holes 66-porous cowling panel
67-lower clapboard 68-rinses pipe network
7-pulp-inlet pipe net 8-air pipe network 9-overflow mechanism
Detailed description of the invention
As shown in Figure 1 to 4, a kind of bubble tower, including absorption tower 1, in absorption tower 1, from top to bottom it is followed successively by demister 5, bubbling mechanism and tower reactor, demister is the conventional demister of wet absorption tower.
Bubbling mechanism includes upper spacer 61, lower clapboard 67, bubbling pipe 64, exhaustor 63, rinses pipe network 68 and porous cowling panel 66.
Upper spacer 61 and lower clapboard 67 are fixed on the inwall on absorption tower, midfeather certain distance, the closing cavity that upper spacer, lower clapboard and absorption tower inwall surround is Jin Yan district, some bubbling pipes 64 are vertically arranged, the upper end of all bubbling pipes stretch in closing cavity connect with closing cavity, lower end is stretched in tower reactor below liquid level, some exhaustors 63 run through upper and lower dividing plate, by below lower clapboard with upper spacer above space connect, exhaustor and bubbling pipe interlaced arrangement.
In Jin Yan district and be positioned at bubbling pipe upper port be provided above rinse pipe network 68, rinse pipe network be made up of the some wash tub pipes being evenly arranged, be uniformly arranged several atomizers below every wash tub pipe, spraying of atomizer is directed downward.
Offering two rows bubble holes 65 on the tube wall of bubbling pipe, bubble holes distance bubbling pipe bottom 200-500mm, the aperture of bubble holes is 20-30mm, and the spacing between adjacent drum abscess is 20-50mm.
Bubble holes is provided above porous cowling panel 66, porous cowling panel is horizontally installed on the inwall of absorption tower, the perforate of porous cowling panel includes bubbling pipe through hole and air-flow traverse hole, air-flow is 15-45mm through the aperture in hole, air-flow is 20%-40% through the percent opening in hole, and the height of porous cowling panel distance bubble holes is 30-100mm.
Porous cowling panel is provided above the pulp-inlet pipe net 7 of external absorption liquid transfer pipeline, and pulp-inlet pipe net 7 is made up of the some pulp-inlet pipes being evenly arranged, and pulp-inlet pipe is uniformly offered serosity hole, and aperture, serosity hole is 10-25mm, and the opening in serosity hole is towards pulp-inlet pipe side off the net.
Being positioned at tower reactor and arrange air pipe network 8, the external oxidation fan of air pipe network, air pipe network is made up of the some air hoses being evenly arranged, and air hose uniformly sets out pore.
Bubbling area (bubble holes region) and oxidation stirring area (air pipe network region) from top to bottom it is followed successively by tower reactor, serum outlet is positioned at oxidation stirring area, outside oxidation stirring area, an outer circulation pump is set, top in outer circulation pump stock inlet connection tower reactor, the grout outlet of outer circulation pump is connected with the serosity shower nozzle being arranged in tower reactor bottom, air pipe network is arranged between the stock inlet connectivity part of outer circulation pump and serosity shower nozzle, forms pulse stirring in stirring area.
The external overflow mechanism 9 in bottom of stirring area, overflow mechanism 9 includes an overflow launder and a controllable register, the entrance and exit of overflow launder is all opened in bottom land, by inserting from bottom land and adjustable for height baffle plate separates between entrance and exit, baffle plate side is feed zone, opposite side is discharge zone, the entrance of overflow launder is communicated to bottom tower reactor, serosity from tower reactor enters feed zone, in from the overflow of controllable register top to discharge zone, stream is discharged to outlet, baffle plate inserts the height adjustable in overflow launder, thus the liquid level regulated in overflow launder, reach to regulate the purpose of liquid level in tower reactor.
Gas approach 2 connects with the Jin Yan district of bubbling mechanism, set gradually humidification spraying mechanism 3 and pre-dedusting mechanism along flue gas flow direction in gas approach, humidification spraying mechanism includes 2～3 layers of shower, every layer of shower being radially arranged along gas approach, shower is uniformly arranged nozzle, the injection direction of nozzle is towards flue gas flow direction, and shower is connected with tower reactor by serosity pump.Pre-dedusting mechanism is folded sheet shape demister 41, folded sheet shape demister be arranged below collecting tank 42, sump bottom passes through pipeline connection to tower reactor, collecting tank is protrude below to flue and be integrated the vertebral body closing cavity of mechanism with flue, it is 30-60 degree that vertebral body closes the angle of cavity outer wall and horizontal plane, and gas approach arranges humidification spraying mechanism section relative to arranging pre-dedusting mechanism section and be inclined upwardly 10-20 degree.
Technological process of the present utility model is as follows:
Flue gas initially enters bubble tower Nei Jinyan district after being sequentially carried out spray humidification and pre-dedusting in gas approach 2, enter back into bubbling pipe 64, bottom bubble holes 65 and bubbling pipe, desulfurization slurry is entered via bubbling pipe, form bubble, bubble floating, be subject to porous cowling panel 66 and intercept, air pocket is fractured into minute bubbles, air-flow is redistributed, and finely dispersed minute bubbles float to liquid level through porous cowling panel, broken；The air-flow that bubble breaking is formed continues to rise, and through exhaustor 63, through demister 5, forms clean flue gas and is discharged by exhanst gas outlet.
Bubble floating process contacts with desulfurization slurry, sulfur dioxide in flue gas, dust etc. enter desulfurization slurry, complete absorption process, fresh slurry enters bubble tower by injection point (ullage), regulates desulfurization slurry pH value in bubble tower, under suitable pH value, through the stirring of tower reactor side and oxidation wind action, the calcium sulfite that sulfur dioxide absorption is formed is aoxidized, crystallized, forms Gypsum Fibrosum.Desulfurization slurry after having reacted is discharged from bubble tower bottom slurry hole, enters aftertreatment systems.
In tower reactor, liquid level is regulated by overflow mechanism.
Embodiment 1:
2 75T heating boiler flue-gas desulfurizing engineerings of certain printing and dyeing mill adopt this technique, SO in flue gas2Concentration is 2316mg/Nm3, dust concentration is 85mg/Nm3, flue-gas temperature is 142 DEG C；Humidification spray liquid-gas ratio is 2.8L/Nm3, bubble holes aperture is 25mm, and cowling panel aperture is 30mm, and percent opening is 30%, and wash tub pipe liquid-gas ratio is 1.5L/Nm3；Aperture, serosity hole is 15mm；Desulfuration efficiency is 98.9%, and outlet dust content is 3.7mg/Nm3。
Embodiment 2:
Certain steam power plant, 1 130T boiler flue gas desulfurization engineering adopts this technique, SO in flue gas2Concentration is 3060mg/Nm3, and dust concentration is 122mg/Nm3, and flue-gas temperature is 118 DEG C；Humidification spray liquid-gas ratio is 2.4L/Nm3, bubble holes aperture is 30mm, and cowling panel aperture is 30mm, and percent opening is 33%, and wash tub pipe liquid-gas ratio is 1.2L/Nm3；Aperture, serosity hole is 18mm；Desulfuration efficiency is 99.2%, and outlet dust content is 4.1mg/Nm3。
Claims (10)
1. the bubble tower carrying out wet process of FGD, the absorption tower of exhanst gas outlet is set including top, demister, bubbling mechanism and tower reactor from top to bottom it is followed successively by described absorption tower, the external gas approach of described bubbling mechanism, it is characterized in that, set gradually humidification spraying mechanism and pre-dedusting mechanism in described gas approach along flue gas flow direction, described bubbling mechanism includes:
Being fixed on the upper spacer on the inwall of absorption tower and lower clapboard, the closing cavity that this upper spacer, lower clapboard and absorption tower inwall surround is Jin Yan district, and described gas approach is connected with this Jin Yan district；
The bubbling pipe of some vertical layouts, the upper end of all bubbling pipes runs through that lower clapboard connects with Jin Yan district, lower end is stretched in tower reactor；
The exhaustor of some vertical layouts, all exhaustors run through upper spacer and lower clapboard and arrange with bubbling pipe dislocation；
Rinse pipe network, be arranged in Jin Yan district and be positioned at the entrance top of described bubbling pipe, this flushing pipe network arranges some atomizers.
2. bubble tower according to claim 1, it is characterised in that described humidification spraying mechanism includes 2～3 layers of shower, every layer of shower being radially arranged along gas approach.
3. bubble tower according to claim 2, it is characterised in that described pre-dedusting mechanism is folded sheet shape demister, folded sheet shape demister be arranged below collecting tank, described sump bottom is by pipeline connection to described tower reactor.
4. bubble tower according to claim 1, it is characterised in that on the tube wall of described bubbling pipe and distance 20-500mm place, bubbling pipe bottom offers some bubble holes, and the aperture of described bubble holes is 20-30mm, and the spacing between adjacent drum abscess is 5-30mm.
5. bubble tower according to claim 4, it is characterised in that be additionally provided with the porous cowling panel being positioned at above described bubble holes, the perforate of described porous cowling panel includes bubbling pipe through hole and air-flow through hole.
6. bubble tower according to claim 5, it is characterised in that described porous cowling panel overdraught is 15-45mm, air-flow through the aperture in hole is 20%-40% through the percent opening in hole, and the height of porous cowling panel distance bubble holes is 30-100mm.
7. bubble tower according to claim 5, it is characterised in that described porous cowling panel is provided above the pulp-inlet pipe net of external absorption liquid transfer pipeline, and described pulp-inlet pipe is uniformly offered serosity hole.
8. bubble tower according to claim 1, it is characterised in that be additionally provided with the air pipe network being positioned at tower reactor, the described external oxidation fan of air pipe network.
9. bubble tower according to claim 1, it is characterised in that being additionally provided with outside described absorption tower for regulating the overflow mechanism of liquid level in tower reactor, the entrance of this overflow mechanism connects with bottom tower reactor.
10. bubble tower according to claim 1, it is characterised in that arrange outer circulation pump outside absorption tower, the stock inlet connection tower reactor top of described outer circulation pump, the grout outlet of described outer circulation pump is connected with the serosity shower nozzle being arranged in tower reactor bottom.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105381703A (en) * | 2015-12-15 | 2016-03-09 | 浙江天蓝环保技术股份有限公司 | Bubble tower and method for wet flue gas desulphurization |
| CN108671739A (en) * | 2018-07-19 | 2018-10-19 | 华南理工大学 | A kind of spray scattering tower apparatus |
| CN110215822A (en) * | 2019-05-31 | 2019-09-10 | 郑州釜鼎热能技术有限公司 | Decontamination dust-extraction unit in a kind of active porous body of alkaline emulsion liquid |
| CN111514732A (en) * | 2020-04-29 | 2020-08-11 | 宜兴市海纳环境工程有限公司 | Multi-pipe type dust removal and desulfurization integrated equipment |
| CN112791672A (en) * | 2020-12-31 | 2021-05-14 | 江苏卅维装备科技有限公司 | Bubble column reaction combination unit |
| CN113680162A (en) * | 2020-08-03 | 2021-11-23 | 史国民 | Medical waste burns process decomposition processing apparatus of waste gas |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105381703A (en) * | 2015-12-15 | 2016-03-09 | 浙江天蓝环保技术股份有限公司 | Bubble tower and method for wet flue gas desulphurization |
| CN105381703B (en) * | 2015-12-15 | 2018-03-23 | 浙江天蓝环保技术股份有限公司 | A kind of bubble tower and method for carrying out wet process of FGD |
| CN108671739A (en) * | 2018-07-19 | 2018-10-19 | 华南理工大学 | A kind of spray scattering tower apparatus |
| CN110215822A (en) * | 2019-05-31 | 2019-09-10 | 郑州釜鼎热能技术有限公司 | Decontamination dust-extraction unit in a kind of active porous body of alkaline emulsion liquid |
| CN111514732A (en) * | 2020-04-29 | 2020-08-11 | 宜兴市海纳环境工程有限公司 | Multi-pipe type dust removal and desulfurization integrated equipment |
| CN113680162A (en) * | 2020-08-03 | 2021-11-23 | 史国民 | Medical waste burns process decomposition processing apparatus of waste gas |
| CN112791672A (en) * | 2020-12-31 | 2021-05-14 | 江苏卅维装备科技有限公司 | Bubble column reaction combination unit |
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