CN110026076A - A kind of electrolytic aluminum smoke device for deep cleaning and method - Google Patents

A kind of electrolytic aluminum smoke device for deep cleaning and method Download PDF

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Publication number
CN110026076A
CN110026076A CN201910397245.5A CN201910397245A CN110026076A CN 110026076 A CN110026076 A CN 110026076A CN 201910397245 A CN201910397245 A CN 201910397245A CN 110026076 A CN110026076 A CN 110026076A
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purifying column
gypsum slurries
lime stone
slurries
purifying
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CN110026076B (en
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曹勇
刘军
许世民
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Inner Mongolia Chuangyuan Metal Co ltd
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Inner Mongolia Huo Mei Chuangyuan Mining Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/68Halogens or halogen compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/20Halogens or halogen compounds
    • B01D2257/204Inorganic halogen compounds
    • B01D2257/2047Hydrofluoric acid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Treating Waste Gases (AREA)

Abstract

A kind of electrolytic aluminum smoke device for deep cleaning and method, electrolytic aluminium purifying column is respectively equipped with gypsum slurries race way from bottom to up, gas approach, purifying column spraying layer, the first demister of purifying column, purifying column hydrops layer, purifying column condenses spraying layer, the second demister of purifying column and purifying column outlet, gypsum slurries race way is connected to by purifying column circulating pump with purifying column spraying layer, the outlet end of purifying column hydrops layer is connected to gypsum slurries race way and lime stone slurry circulating box respectively, lime stone slurry circulating box condenses spraying layer with purifying column by circulating cooling tower and is connected to, lime stone slurry circulating box and gypsum slurries race way are connected to lime stone slurry source respectively, gypsum slurries race way is connected to gypsum slurries processing system, the present invention is by making full use of the limestone slurry liquid preparing system in former power plant desulphurization system, by-product processing system The auxiliary system of system carries out inexpensive deep purifying to the electrolytic aluminum smoke after completing dry cleaning using two-stage wet scrubbing technique.

Description

A kind of electrolytic aluminum smoke device for deep cleaning and method
Technical field
The invention belongs to resource and environment protection technique fields, and in particular to a kind of electrolytic aluminum smoke device for deep cleaning and Method.
Background technique
During Aluminum Electrolysis Production, the flue gas of generation contains a large amount of HF, SO2, the pollutants such as particulate matter, direct emission The growth with plant can be seriously endangered human health, it is necessary to which purified treatment is carried out to electrolytic aluminum smoke.Electrolytic aluminum smoke purification Method is divided to two kinds of wet cleaning, dry cleaning: wet cleaning system is for soluble gas, such as SO2With the gaseous pollutants such as HF Arresting efficiency is higher, but easily causes purification efficiency low since gas-liquid separation is undesirable, and fine particle removal efficiency is not high, water consumption Amount is big, equipment seriously corroded, and technical process is complex, is also easy to produce secondary pollution;Dry cleaning directly uses electrolysis Al2O3The HF in exhaust gas is absorbed, has high-efficient, without secondary pollution, operation is simple, the low feature of running expense, thus obtains It is widely applied.Currently, dry cleaning method is mainly used to electrolytic aluminum smoke both at home and abroad.
It is right with the promulgation of national new standard " aluminum i ndustry pollutant emission standard " (GB25465-2010) and its modification list The emission request of electrolytic aluminum smoke pollutant (sulfur dioxide, particulate matter and fluoride) is significantly promoted, meanwhile, with The completion of power industry coal-fired flue-gas minimum discharge transformation, electrolytic aluminum smoke realize that minimum discharge will become inevitable trend, Must be to the existing further deep purifying of dry electrolysis aluminium tail gas, and the processing of existing dry electrolysis aluminium flue gas treating process is imitated Rate is difficult to further increase.
Big, gaseous pollutant (HF, SO for existing Dry Adsorption electrolytic aluminum smoke discharge amount2) base concentration is low, particle The small feature of object partial size, electrolytic aluminum smoke advanced purification process relatively conventional at present are all made of in electrolytic aluminum smoke dry process A whole set of wet processing system is built after device again, the deep purifying of Lai Shixian electrolytic aluminum smoke changes process system complexity, investment fortune Row is at high cost, and is limited and be difficult to carry out by place.Patent CN105603459A disclose Rare Earth Electrolysis aluminium flue gas purification system and Method, using first segment Dry Adsorption fluorine removal second segment wet desulphurization, desulfurizing agent NaOH, Na2CO3、Ca(OH)2, ammonium hydroxide etc., Not only system complex, it is difficult to which not high to the ultrafine dust arresting efficiency after dry method, there is also waste water the secondary pollutions such as to be difficult to handle; Patent CN102228775A discloses a kind of electrolytic aluminium desulfurization, defluorinate integral method, is carried out using ammonium hydroxide to tail gas of electrolytic aluminum Washing desulphurization, defluorinate, and carry out defluorinate in the solution and realize fluorine recycling, change process system complexity, is not suitable for net in existing dry method Transformation is set in makeup, and there are the escaping of ammonia to cause secondary pollution.Patent CN106334442A discloses a kind of electrolytic aluminum smoke liquid Phase desulfurizer and method are purified by alkaline absorption solution flue is atomization, complete the absorbing liquid of purification by regeneration After reuse, in atomization process, atomized drop is easily adhered to flue and avoids and formed fouling the technique, block flue, System is caused to be unable to operate stably, and not high to electrolytic aluminum smoke purification efficiency.
Summary of the invention
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of electrolytic aluminum smoke device for deep cleaning and side Method, specific technical solution are as follows:
A kind of electrolytic aluminum smoke device for deep cleaning, including electrolytic aluminium purifying column, purifying column circulating pump, condensation cycle pump, Limestone slurry liquid pump, lime stone slurry circulating box, circulating cooling tower, lime stone slurry storage bin and gypsum slurries processing system, The electrolytic aluminium purifying column is respectively arranged with gypsum slurries race way, gas approach, purifying column spraying layer, purifying column from bottom to up First demister, purifying column hydrops layer, purifying column condensation spraying layer, the second demister of purifying column and purifying column outlet, purifying column The input end of circulating pump is connected to gypsum slurries race way, and the outlet end of purifying column circulating pump is connected to purifying column spraying layer, only The outlet end for changing tower hydrops layer is connected to gypsum slurries race way and lime stone slurry circulating box respectively, the import of circulating cooling tower End is pumped by condensation cycle and is connected to lime stone slurry circulating box, and the outlet end of circulating cooling tower and purifying column condensation spraying layer connect Logical, lime stone slurry storage bin is connected with lime stone slurry circulating box and gypsum slurries race way respectively by limestone slurry liquid pump Logical, gypsum slurries race way is connected to by pipeline with gypsum slurries processing system.
The gypsum slurries processing system includes gypsum discharge pump, gypsum slurries pans, gypsum slurries intermediate pump and electricity Factory's desulfurizing tower, the desulfurizing tower of electric power plant are respectively arranged with desulfurization slurry race way, coal-fired flue-gas import, desulfurizing tower spray from bottom to up Drenching layer, desulfurizer mist eliminator and desulfurizing tower outlet, the input end of gypsum discharge pump and the gypsum slurries of electrolytic aluminium purifying column recycle Area's connection, the outlet end of gypsum discharge pump are connected to gypsum slurries pans, the input end and calcium plaster of gypsum slurries intermediate pump The connection of liquid pans, the outlet end of gypsum slurries intermediate pump are connected to the desulfurization slurry race way of desulfurizing tower of electric power plant, power plant desulfurization Tower is additionally provided with desulfurizing tower circulating pump, and the input end of desulfurizing tower circulating pump is connected to desulfurization slurry race way, desulfurizing tower circulating pump Outlet end be connected to desulfurizing tower spraying layer.
Lime stone slurry circulating box and lime stone slurry storage bin, gypsum slurries race way and lime stone slurry storage bin, It is set respectively on pipeline between purifying column hydrops layer and gypsum slurries race way, purifying column hydrops layer and lime stone slurry circulating box It is equipped with flow control valve.
The gypsum slurries race way of the electrolytic aluminium purifying column, lime stone slurry circulating box, gypsum slurries pans, power plant The bottom of the desulfurization slurry race way of desulfurizing tower is equipped with distribution device, and each distribution device has been respectively communicated with oxidation fan.
Defining the pipeline between lime stone slurry storage bin and lime stone slurry circulating box, gypsum slurries race way is lime Stone slurries transfer pipeline, defining the pipeline between gypsum slurries race way and gypsum slurries pans is gypsum slurries recurrent canal Road, the lime stone slurry transfer pipeline and gypsum slurries return pipeline are integrally provided with heat preservation protection, and gypsum slurries recurrent canal Road is located at the lower section of lime stone slurry transfer pipeline.
The residence time of gypsum slurries is 30-100mim in the gypsum slurries pans.
A kind of electrolytic aluminum smoke deep-purifying method, it is special using a kind of electrolytic aluminum smoke device for deep cleaning above-mentioned Sign is, comprising the following steps:
Step 1, power plant's wet desulfurization system lime stone slurry by limestone slurry liquid pump drive through long range limestone slurry Liquid transfer pipeline is sent respectively to lime stone slurry circulating box and gypsum slurries race way, for adjusting purifying column spraying layer and purification The pH value of tower condensation spraying layer slurries;
Step 2, the electrolytic aluminum smoke for completing dry method preliminary purification enter electrolytic aluminium purifying column, the slurry with purifying column spraying layer Liquid haptoreaction removes most of gaseous pollutant and particulate matter, the slurries of electrolytic aluminum smoke and purifying column spraying layer in flue gas Heat exchange reaches saturation;
Step 3, the electrolytic aluminum smoke for reaching saturation pass through purifying column hydrops layer after the first demister demisting, with purifying column The further haptoreaction of slurries of spraying layer is condensed, the pollutant in flue gas is further removed, realizes that electrolytic aluminum smoke depth is net Change;
The slurries of step 4, completion preliminary purification and deep purifying are pumped to calcium plaster after preliminary oxidation, by gypsum discharge Liquid pans further aoxidize, and the gypsum slurries for completing oxidation are sent through long-distance pipe to power plant desulfurization by gypsum slurries intermediate pump Desulfurizer slurry of the tower as power plant soot fume.
The purifying column spraying layer plasm PH value is 5.0~6.5, and the liquid-gas ratio of purifying column spraying layer is 1-10L/Nm3
The purifying column circulated sprinkling layer slurry pH value is 6.0-8.0, and purifying column circulated sprinkling layer liquid-gas ratio is 0.5-5L/ Nm3
Condensation temperature is 2-20 DEG C in the purifying column condensation spray layer region.
Slurries in the lime stone slurry storage bin are specially lime stone prepared by power plant's wet desulphurization pulping system Slurries.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention provides a kind of solutions of electrolytic aluminum smoke low cost purification, by making full use of former power plant de- The auxiliary system (gypsum slurries processing system) of limestone slurry liquid preparing system, by-product processing system in sulphur system uses Wet scrubbing technique carries out deep purifying to the electrolytic aluminum smoke after completing dry cleaning, and invention has the advantages of high efficiency, process is simple, accounts for Ground area is small, investment operating cost is low.
2, the present invention provides a kind of solutions of electrolytic aluminum smoke deep purifying, for HF, SO2Equal gaseous pollutants It is absorbed using subregion for slurry, zonal control pH value and subregion, realizes the deep purifying of gaseous pollutant;For spray droplet without The superfine particulate matter of method trapping is efficiently trapped using condensation, coalescence falling temperature technique, final to realize that electrolytic aluminum smoke pollutes more Object becomes zero-emission, and the improvement for greatly improving electrolytic aluminum smoke is horizontal.
3, the present invention provides a kind of solution for realizing slurries long distance delivery, pass through lime stone slurry transfer pipeline And gypsum slurries return pipeline completes the long distance of lime stone slurry and gypsum slurries between power plant's wet desulfurization system and the present invention From conveying, by the way that lime stone slurry and gypsum slurries pipeline are carried out the overall package in the form of piping lane, it is integrally provided with to keep the temperature and protects, And gypsum slurries return pipeline is located at below limestone slurry liquid pipeline, effectively avoids low temperature lime stone slurry pipeline and endures cold damage It is bad, the operation stability of device greatly improved.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
Wherein: electrolytic aluminium purifying column 1;Purifying column circulating pump 2;Lime stone slurry circulating box 3;Circulating cooling tower 4;Calcium plaster Liquid race way 101;Gas approach 102;Purifying column spraying layer 103;The first demister of purifying column 104;Purifying column hydrops layer 105; Purifying column condenses spraying layer 106;The second demister of purifying column 107;Purifying column outlet 108;Lime stone slurry storage bin 5;Gypsum Discharge pump 6;Gypsum slurries pans 7;Gypsum slurries intermediate pump 8;Desulfurizing tower of electric power plant 9;Desulfurization slurry race way 901;Coal-fired cigarette Gas import 902;Desulfurizing tower spraying layer 903;Desulfurizer mist eliminator 904;Desulfurizing tower outlet 905;Desulfurizing tower circulating pump 906;Flow Regulating valve 10;Lime stone slurry transfer pipeline 11;Gypsum slurries return pipeline 12;Oxidation fan 13;Condensation cycle pump 14;Lime Stone slurries pump 15.
Specific embodiment
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
As shown in Figure 1, the present invention provides a kind of electrolytic aluminum smoke device for deep cleaning, including it is electrolytic aluminium purifying column 1, net Change tower circulating pump 2, condensation cycle pumps 14, limestone slurry liquid pump 15, lime stone slurry circulating box 3, circulating cooling tower 4, lime stone Slurry holding tank 5 and gypsum slurries processing system, the electrolytic aluminium purifying column 1 are respectively arranged with gypsum slurries circulation from bottom to up Area 101, gas approach 102, purifying column spraying layer 103, the first demister of purifying column 104, purifying column hydrops floor 105, purifying column Condense spraying layer 106, the second demister of purifying column 107 and purifying column outlet 108, the input end and gypsum of purifying column circulating pump 2 Serum recycle area 101 is connected to, and the outlet end of purifying column circulating pump 2 is connected to purifying column spraying layer 103, purifying column hydrops layer 105 Outlet end be connected to respectively with gypsum slurries race way 101 and lime stone slurry circulating box 3, the input end of circulating cooling tower 4 is logical It crosses condensation circulating pump 14 to be connected to lime stone slurry circulating box 3, the outlet end of circulating cooling tower 4 and purifying column condense spraying layer 106 connection, lime stone slurry storage bin 5 by limestone slurry liquid pump 15 respectively with lime stone slurry circulating box 3 and gypsum slurries Race way 101 is connected to, and gypsum slurries race way 101 is connected to by pipeline with gypsum slurries processing system.
The gypsum slurries processing system includes gypsum discharge pump 6, gypsum slurries pans 7,8 and of gypsum slurries intermediate pump Desulfurizing tower of electric power plant 9, the desulfurizing tower of electric power plant 9 are respectively arranged with desulfurization slurry race way 901, coal-fired flue-gas import from bottom to up 902, desulfurizing tower spraying layer 903, desulfurizer mist eliminator 904 and desulfurizing tower outlet 905, the input end of gypsum discharge pump 6 and electrolysis The gypsum slurries race way 101 of aluminium purifying column 1 is connected to, and the outlet end of gypsum discharge pump 6 is connected to gypsum slurries pans 7, stone The input end of cream slurries intermediate pump 8 is connected to gypsum slurries pans 7, the outlet end of gypsum slurries intermediate pump 8 and power plant desulfurization The desulfurization slurry race way 901 of tower 9 is connected to, and desulfurizing tower of electric power plant 9 is additionally provided with desulfurizing tower circulating pump 11, desulfurizing tower circulating pump 11 Input end is connected to desulfurization slurry race way 901, and the outlet end of desulfurizing tower circulating pump 11 is connected to desulfurizing tower spraying layer 903.
Lime stone slurry circulating box 3 and lime stone slurry storage bin 5, gypsum slurries race way 101 and lime stone slurry store up Deposit case 5, purifying column hydrops layer 105 and gypsum slurries race way 101, purifying column hydrops layer 105 and lime stone slurry circulating box 3 it Between pipeline on be respectively arranged with flow control valve 10.
The gypsum slurries race way 101 of the electrolytic aluminium purifying column 1, lime stone slurry circulating box 3, gypsum slurries pans 7, the bottom of the desulfurization slurry race way 901 of desulfurizing tower of electric power plant 9 is equipped with distribution device, and each distribution device has been respectively communicated with oxidation Blower 13.
Define the pipeline between lime stone slurry storage bin 5 and lime stone slurry circulating box 3, gypsum slurries race way 101 For lime stone slurry transfer pipeline 11, defining the pipeline between gypsum slurries race way 101 and gypsum slurries pans 7 is gypsum Slurries return pipeline 12, the lime stone slurry transfer pipeline 11 and gypsum slurries return pipeline 12 are integrally provided with heat preservation protection, And gypsum slurries return pipeline 12 is located at the lower section of lime stone slurry transfer pipeline 11.
Gypsum slurries pans 7 are used to complete the oxidation of gypsum slurries sulfite calcium and the dissolution of limestone particle object, As preferred: the residence time of gypsum slurries is 30-100mim in 7 slurries of gypsum slurries pans.
A kind of electrolytic aluminum smoke deep-purifying method, it is special using a kind of electrolytic aluminum smoke device for deep cleaning above-mentioned Sign is, comprising the following steps:
Step 1, power plant's wet desulfurization system lime stone slurry by limestone slurry liquid pump 15 drive through long range lime stone Slurries transfer pipeline is sent respectively to lime stone slurry circulating box 3 and gypsum slurries race way 101, for adjusting purifying column spraying layer 103 and purifying column condensation 106 slurries of spraying layer pH value;
Step 2, the electrolytic aluminum smoke for completing dry method preliminary purification enter electrolytic aluminium purifying column 1, with purifying column spraying layer 103 Slurry liquid contacts reaction, remove most of gaseous pollutant and particulate matter in flue gas, electrolytic aluminum smoke and purifying column spraying layer 103 Slurries heat exchange reach saturation;
Step 3, the electrolytic aluminum smoke for reaching saturation pass through purifying column hydrops layer 105 after 104 demisting of the first demister, with Purifying column condenses the further haptoreaction of slurries of spraying layer 106, further removes the pollutant in flue gas, realizes electrolytic aluminium cigarette Gas deep purifying;
The slurries of step 4, completion preliminary purification and deep purifying are sent by gypsum discharge pump 6 to gypsum after preliminary oxidation Slurries pans 7 further aoxidize, and the gypsum slurries for completing oxidation are sent through long-distance pipe to power plant by gypsum slurries intermediate pump 8 Desulfurizer slurry of the desulfurizing tower 9 as power plant soot fume.
The purifying column condensation spraying layer 106106 is used to carry out deep purifying, slurries (i.e. lime to electrolytic aluminum smoke Slurries in stone slurry circulation case 3) pH value be 6.0-8.0, purifying column condense 106106 liquid-gas ratio of spraying layer be 0.5-5L/ Nm3。。
The purifying column circulated sprinkling layer slurry pH value is 6.0-8.0, and purifying column circulated sprinkling layer liquid-gas ratio is 0.5-5L/ Nm3
Circulating cooling tower 4 is used to carry out condensation cooling to purifying column condensation 106 slurries of spraying layer, realizes net to demisting is completed The electrolytic aluminum smoke of change is condensed, and deep purifying sprayed slurry is difficult to the ultrafine dust particulate matter trapped, and the purifying column is cold Condensation temperature is 2-20 DEG C in solidifying 106 region of spraying layer.
Slurries in the lime stone slurry storage bin 5 are specially lime stone prepared by power plant's wet desulphurization pulping system Slurries.
The present invention provides a kind of stable, economic, efficient electrolytic aluminum smoke device for deep cleaning and methods, existing Increase wet cleaning tower after having dry electrolysis aluminium flue gas processing device, lime stone slurry and calcium plaster are conveyed by long range piping lane The lime stone slurry of power plant's wet desulfurization system is divided to two road direction lime stone slurry circulating boxes 3 and gypsum slurries to follow by liquid by the road For ring region 101 for slurry, specific workflow and principle are as follows:
The high-temperature electrolysis aluminium flue gas for completing dry method preliminary purification carries a large amount of HF, SO2And pass through dry cloth bag filtering system The pollutants such as the superfine particulate matter of system are entered in electrolytic aluminium purifying column 1 and are moved upwards by gas approach 102, are sprayed with purifying column The atomization slurry of 103 lower PH of layer inversely contacts, and removes most of HF, SO in electrolytic aluminum smoke2And superfine particulate matter, high temperature The loop slurry contact heat-exchanging of electrolytic aluminum smoke and purifying column spraying layer 103, moisture in loop slurry is heated flash to it is a large amount of Vapor enters electrolytic aluminum smoke, and electrolytic aluminum smoke cools down and reaches saturation state, completes the electrolytic aluminium saturation cigarette of preliminary purification Gas carries HF, the SO not eliminated on a small quantity2, superfine particulate matter and tiny washing slurries droplet pass through the first demister of purifying column 104, After the first demister 104 removes tiny washing slurries droplet completion demisting, drying, enter by purifying column hydrops layer 105 net Change tower and condense spraying layer 106, condenses low temperature in spraying layer 106 with purifying column, the sprayed slurry droplet of higher pH further contacts Reaction removes and remains HF, SO in flue gas2Equal gaseous pollutants, complete deep purifying;
Electrolytic aluminium saturated flue gas and low temperature purification tower circulated sprinkling slurries complete condensing heat-exchange simultaneously, and saturated flue gas is because of cooling Reach hypersaturated state, vapor is condensed using superfine particulate matter remaining in flue gas as the nuclei of crystallization, condensed, become by vaporous water At liquid water and enter purifying column hydrops layer 105 under the effect of gravity and purifying column is discharged, realizes super to being remained in electrolytic aluminum smoke The efficient trapping of fine particle, complete deep purifying purified 107 demisting of the second demister of tower of electrolytic aluminum smoke it is dry after by 108 discharge of purifying column outlet.
The lime stone slurry of power plant's wet desulfurization system is sent by the road by limestone slurry liquid pump 15 to lime stone slurry respectively Circulating box 3 and gypsum slurries race way 101, the flow control valve 10 on pipeline are used to adjust the supply flow rate of lime stone slurry, It is used to adjust the pH value of gypsum slurries race way 101, purified tower spray into the lime stone slurry of gypsum slurries race way 101 Preliminary purification is carried out to electrolytic aluminum smoke after 103 atomization of layer;Lime stone slurry into lime stone slurry circulating box 3 is used to adjust The pH value of 3 slurries of lime stone slurry circulating box, for the deep purifying to electrolytic aluminum smoke after the condensation cooling of circulating cooling tower 4 And the high-efficiency condensation of superfine particulate matter, coalescence, trapping;
Purifying column condensation 106 slurries of spraying layer for completing deep purifying carry calcium sulfite that big quantitative response generates, ultra-fine Purified 105 outlet end of tower hydrops layer of particulate matter respectively enters purifying column tower bottom gypsum slurries circulation 101 and lime stone slurry follows Ring case 3, gypsum slurries race way 101 and 33 bottom of lime stone slurry circulating box pass through piping connection respectively oxidation fan 13, For the calcium sulfite that oxidation reaction generates, calcium sulfite precipitating package limestone particle object is prevented, limestone particle object is hindered Dissolution.
Lime stone slurry is changed into gypsum slurries after completing preliminary purification and deep purifying, is sent by gypsum discharge pump 6 to stone Cream slurries pans 7, the oxidation fan 13 through being connected to gypsum slurries pans 7 further aoxidize, remaining in gypsum slurries Limestone particle object further dissolves out, and gypsum slurries pH value increases, and completes the high ph-values gypsum slurries of oxidation and dissolution by gypsum Slurries intermediate pump 8 is sent to the desulfurization slurry race way 901 of desulfurizing tower of electric power plant 9, as the desulfurizer slurry of power plant soot fume, electricity Factory's coal-fired flue-gas enters from coal-fired flue-gas import 902, completes the purification to power plant soot fume through desulfurizing tower spraying layer 903, complete At the power plant soot fume of purification by 905 discharge of desulfurizing tower outlet after 904 demisting of desulfurizer mist eliminator is dry.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair The present invention is described in detail, and the those of ordinary skill in field is it is understood that still can be to specific embodiment party of the invention Formula is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, it should all Cover in present claims range.

Claims (10)

1. a kind of electrolytic aluminum smoke device for deep cleaning, which is characterized in that including electrolytic aluminium purifying column, purifying column circulating pump, cold Solidifying circulating pump, limestone slurry liquid pump, lime stone slurry circulating box, circulating cooling tower, lime stone slurry storage bin and gypsum slurries Processing system, the electrolytic aluminium purifying column are respectively arranged with gypsum slurries race way, gas approach, purifying column spray from bottom to up Layer, the first demister of purifying column, purifying column hydrops layer, purifying column condensation spraying layer, the second demister of purifying column and purifying column go out Mouthful, the input end of purifying column circulating pump is connected to gypsum slurries race way, and the outlet end of purifying column circulating pump and purifying column spray Layer connection, the outlet end of purifying column hydrops layer are connected to gypsum slurries race way and lime stone slurry circulating box respectively, are recycled cold But the input end of tower is pumped by condensation cycle and is connected to lime stone slurry circulating box, and the outlet end of circulating cooling tower and purifying column are cold Solidifying spraying layer connection, lime stone slurry storage bin by limestone slurry liquid pump respectively with lime stone slurry circulating box and gypsum slurries Race way connection, gypsum slurries race way are connected to by pipeline with gypsum slurries processing system.
2. a kind of electrolytic aluminum smoke device for deep cleaning according to claim 1, which is characterized in that at the gypsum slurries Reason system includes gypsum discharge pump, gypsum slurries pans, gypsum slurries intermediate pump and desulfurizing tower of electric power plant, the desulfurizing tower of electric power plant It is respectively arranged with desulfurization slurry race way from bottom to up, coal-fired flue-gas import, desulfurizing tower spraying layer, desulfurizer mist eliminator and de- The outlet of sulphur tower, the input end of gypsum discharge pump are connected to the gypsum slurries race way of electrolytic aluminium purifying column, and gypsum discharge pump goes out Mouth end is connected to gypsum slurries pans, and the input end of gypsum slurries intermediate pump is connected to gypsum slurries pans, gypsum slurries The outlet end of intermediate pump is connected to the desulfurization slurry race way of desulfurizing tower of electric power plant.
3. a kind of electrolytic aluminum smoke device for deep cleaning according to claim 2, which is characterized in that lime stone slurry circulation Case and lime stone slurry storage bin, gypsum slurries race way and lime stone slurry storage bin, purifying column hydrops layer and gypsum slurries Flow control valve is respectively arranged on pipeline between race way, purifying column hydrops layer and lime stone slurry circulating box.
4. a kind of electrolytic aluminum smoke device for deep cleaning according to claim 3, which is characterized in that the electrolytic aluminium purification The gypsum slurries race way of tower, lime stone slurry circulating box, gypsum slurries pans, desulfurizing tower of electric power plant desulfurization slurry race way Bottom be equipped with distribution device, each distribution device has been respectively communicated with oxidation fan.
5. a kind of electrolytic aluminum smoke device for deep cleaning according to claim 4, which is characterized in that define lime stone slurry Pipeline between storage bin and lime stone slurry circulating box, gypsum slurries race way is lime stone slurry transfer pipeline, defines stone Pipeline between cream serum recycle area and gypsum slurries pans is gypsum slurries return pipeline, the lime stone slurry delivery pipe Road and gypsum slurries return pipeline are integrally provided with heat preservation protection, and gypsum slurries return pipeline is located at lime stone slurry transfer pipeline Lower section.
6. a kind of electrolytic aluminum smoke device for deep cleaning according to claim 5, which is characterized in that in the gypsum slurries Between in tank the residence time of gypsum slurries be 30-100mim.
7. a kind of electrolytic aluminum smoke deep-purifying method, using a kind of electrolytic aluminum smoke deep purifying as described in claim 1 Device, which comprises the following steps:
Step 1, the lime stone slurry of power plant's wet desulfurization system are defeated through long range lime stone slurry by the driving of limestone slurry liquid pump Pipeline is sent to be sent respectively to lime stone slurry circulating box and gypsum slurries race way, it is cold for adjusting purifying column spraying layer and purifying column The pH value of solidifying spraying layer slurries;
Step 2, the electrolytic aluminum smoke for completing dry method preliminary purification enter electrolytic aluminium purifying column, connect with the slurries of purifying column spraying layer Touching reaction, removes most of gaseous pollutant and particulate matter in flue gas, and the slurries of electrolytic aluminum smoke and purifying column spraying layer exchange heat Reach saturation;
Step 3, the electrolytic aluminum smoke for reaching saturation pass through purifying column hydrops layer after the first demister demisting, condense with purifying column The further haptoreaction of the slurries of spraying layer further removes the pollutant in flue gas, realizes electrolytic aluminum smoke deep purifying;
The slurries of step 4, completion preliminary purification and deep purifying are pumped in gypsum slurries after preliminary oxidation by gypsum discharge Between tank further aoxidize, complete oxidation gypsum slurries by gypsum slurries intermediate pump through long-distance pipe send to desulfurizing tower of electric power plant make For the desulfurizer slurry of power plant soot fume.
8. a kind of electrolytic aluminum smoke deep-purifying method according to claim 7, which is characterized in that the purifying column spray Layer plasm PH value is 5.0~6.5, and the liquid-gas ratio of purifying column spraying layer is 1-10L/Nm3
9. a kind of electrolytic aluminum smoke deep-purifying method according to claim 8, which is characterized in that the purifying column circulation Spraying layer slurry pH value is 6.0-8.0, and purifying column circulated sprinkling layer liquid-gas ratio is 0.5-5L/Nm3
10. a kind of electrolytic aluminum smoke deep-purifying method according to claim 9, which is characterized in that the purifying column is cold Condensation temperature is 2-20 DEG C in solidifying spray layer region.
CN201910397245.5A 2019-05-14 2019-05-14 Electrolytic aluminum flue gas deep purification device and method Active CN110026076B (en)

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KR19990006143U (en) * 1997-07-24 1999-02-18 이해규 Flue Gas Desulfurization System
CN102091519A (en) * 2010-12-28 2011-06-15 哈尔滨工业大学 Double-groove wet-process flue gas desulfuration device and method operating on basis of two pH values
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CN108970368A (en) * 2018-10-09 2018-12-11 杭州蕴泽环境科技有限公司 Zero water consume wet desulphurization device of one kind and its sulfur removal technology
CN210171208U (en) * 2019-05-14 2020-03-24 内蒙古霍煤创源矿业有限公司 Electrolytic aluminum flue gas deep purification device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990006143U (en) * 1997-07-24 1999-02-18 이해규 Flue Gas Desulfurization System
CN102091519A (en) * 2010-12-28 2011-06-15 哈尔滨工业大学 Double-groove wet-process flue gas desulfuration device and method operating on basis of two pH values
CN105709585A (en) * 2016-01-27 2016-06-29 广西博世科环保科技股份有限公司 Double-tower efficient wet desulphurization device
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