CN107185385A - A kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method - Google Patents
A kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method Download PDFInfo
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- CN107185385A CN107185385A CN201710552055.7A CN201710552055A CN107185385A CN 107185385 A CN107185385 A CN 107185385A CN 201710552055 A CN201710552055 A CN 201710552055A CN 107185385 A CN107185385 A CN 107185385A
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- tower
- flue gas
- magnesium
- magnesium hydroxide
- desulfuration absorbing
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- 239000003546 flue gas Substances 0.000 title claims abstract description 70
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003723 Smelting Methods 0.000 title claims abstract description 22
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 10
- 239000011593 sulfur Substances 0.000 title claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 91
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 70
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 36
- 230000003647 oxidation Effects 0.000 claims abstract description 35
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 33
- 238000010521 absorption reaction Methods 0.000 claims abstract description 29
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 16
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 10
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011777 magnesium Substances 0.000 claims abstract description 9
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000008021 deposition Effects 0.000 claims abstract description 5
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 95
- 239000000347 magnesium hydroxide Substances 0.000 claims description 79
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 79
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 77
- 239000007788 liquid Substances 0.000 claims description 37
- 238000003860 storage Methods 0.000 claims description 28
- 238000005273 aeration Methods 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 24
- 230000023556 desulfurization Effects 0.000 claims description 19
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 15
- 239000012716 precipitator Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 11
- ZGBSOTLWHZQNLH-UHFFFAOYSA-N [Mg].S(O)(O)(=O)=O Chemical compound [Mg].S(O)(O)(=O)=O ZGBSOTLWHZQNLH-UHFFFAOYSA-N 0.000 claims description 8
- 231100000614 poison Toxicity 0.000 claims description 8
- 230000007096 poisonous effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 7
- 230000003020 moisturizing effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000012946 outsourcing Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000001502 supplementing effect Effects 0.000 claims 1
- 230000003009 desulfurizing effect Effects 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 4
- 239000003500 flue dust Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 38
- 239000012047 saturated solution Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005200 wet scrubbing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/40—Magnesium sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses the spuious flue gas during smelting wet dedusting of atm number, sulfur method.Based on desulfurizing agent is absorbed with magnesia, supplemented by sodium hydroxide, according to flue gas SO2Addition amount of sodium hydroxide is adjusted in time for concentration；Desulfuration absorbing tower is using " absorbing the emptying of dedusting demisting " integral structure；Desulfuration absorbing tower entrance installs temperature flue gas cooling device；Increase lateral agitating device and aerating oxidation device in desulfuration absorbing tower bottom, sl. sol. magnesium sulfite in absorption tower is sufficiently converted into readily soluble magnesium sulfate, it is to avoid the deposition of the insoluble matter such as flue dust, oxidation magnesium addition.The separation of insoluble matter and Adlerika can be realized by way of using press filtration to doctor solution.Processing cost is low, and effect is notable.Complicated flue gas during smelting high temperature period, atm number, high concentration SO can be met2The processing of the particular time flue gases such as discharge.
Description
Technical field
The invention belongs to smelt, chemical field, be related to a kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method,
Carry out " absorption-dedusting-demisting-emptying " integration, all the period of time improvement up to standard.
Background technology
In smelting process, it can usually produce and largely contain SO2Low concentration smelt spuious flue gas, mainly given birth to including each stove
During production, loss collection flue gas, maintenance insulation flue gas, charging and discharging escape flue gas, low concentration pyrolytic semlting flue gas in factory building
Deng.Be characterized in it is large-minded, with low concentration SO2Based on there is the highly concentrated period, there is the high temperature period based on low temperature（Normal flue gas
Temperature is about 40-55 DEG C, and special circumstances are up to 280 DEG C）, and also with a large amount of, a variety of poisonous, harmful heavy metal materials in flue gas.
By the regulation of new environmental law, such flue gas must all the period of time qualified discharge, produce waste water must processing up to standard.
The method of conventionally employed subsection harnessing is handled, and complicated flue gas first is carried out into wet scrubbing pretreatment, smoke abatement is removed
The flue dust of gas institute band, reduces temperature, then to flue gas desulfurization, demisting after purification, emptying.This method effect is obvious, but technical process is multiple
Miscellaneous, equipment investment and running cost are too high, and economy is not good enough, but also produce a large amount of acid waste waters, and processing cost is higher.
The content of the invention
The deficiency that the purpose of the present invention exists aiming at traditional handicraft, with reference to atm number, complicated low concentration flue gas during smelting
The characteristics of there is provided a kind of with " absorption-dedusting-demisting-row of the magnesia as the complicated flue gas during smelting of low-cost processes of desulfurizing agent
It is empty " integrated, all the period of time administering method up to standard.
The technical solution adopted by the present invention is：A kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method, it is used to set
It is standby to include：Desulfuration absorbing tower, Flue Gas Forced Draft Fan, demister, wet electrical dust precipitator, Multi-layer sprinkling device, stream carry effect tower tray,
Air gun, lateral agitating device, spraying layer control valve, entrance SO2Concentration detector, outlet SO2Concentration detector, absorption tower
Circulating pump, oxidation fan, sodium hydroxide automatic control adjustable valve, sodium hydroxide storage tank, magnesium hydroxide slurries liquid pump, magnesium hydroxide slurry
Groove, magnesium oxide slaking pump, magnesium oxide slaking groove, doctor solution storage pool, filter press, doctor solution filter pressing pump, chimney, magnesium hydroxide slurries
Liquid spray equipment；Desulfuration absorbing tower gas approach front end sets Flue Gas Forced Draft Fan, and desulfurizing absorption tower body middle and lower part flue gas enters
Installed at mouthful and entrance SO is installed on magnesium hydroxide slurry spray equipment, smoke inlet pipe2Concentration detector, sodium hydroxide storage tank leads to
Cross pump, pipeline communication and enter the pipeline of desulfuration absorbing tower bottom and connection provided with sodium hydroxide automatic control adjustable valve, outlet SO2Concentration
Detector is located in chimney, entrance SO2Concentration detector and outlet SO2Concentration detector respectively with sodium hydroxide automatic control adjustable valve
Interlocking of signals；Demister, Multi-layer sprinkling device, stream is set to carry effect tower respectively from top to bottom inside the desulfurizing absorption tower body
Disk；Set above demister inside the desulfurizing absorption tower body above wet electrical dust precipitator, wet electrical dust precipitator is chimney；
The desulfuration absorbing tower bottom sets oxidation and aeration device, and the oxidation and aeration device includes oxidation fan, air gun, aeration
Air supervisor, aeration air branch pipe, aeration air supervisor are placed in tower in the middle part of slurry layer, and one end is connected with oxidation fan, another
End is connected by aerating oxidation branch pipe with air gun, and the desulfuration absorbing tower bottom also sets up lateral agitating device；Magnesia
Digester is connected by pipeline with magnesium oxide slaking pump, and the magnesium oxide slaking pump discharge is connected to magnesium hydroxide slurries liquid bath, hydrogen-oxygen
It is magnesium hydroxide slurry spray equipment feed flow and desulfuration absorbing tower at smoke inlet to change magnesium slurry tank by magnesium hydroxide slurries liquid pump
Supplement magnesium hydroxide slurry and be provided with valve for the pipeline that desulfuration absorbing tower supplements magnesium hydroxide slurry；Positioned at desulfuration absorbing tower bottom
The absorption tower circulating-pump outlet in portion, separates two branch roads, Multi-layer sprinkling device is connected to all the way, every layer respectively by spraying layer control valve
Control is adjusted, another road is connected on doctor solution storage pool and connecting line and sets valve；The doctor solution storage pool is through doctor solution
Filter pressing pump is connected with filter press.
Technological process is：After the spuious flue gas during smelting of atm number is pressurized through Flue Gas Forced Draft Fan, sprayed through magnesium hydroxide slurry
After shower device pretreatment, enter tower body from desulfuration absorbing tower middle and lower part, effect tower tray 6 is carried with coming from Multi-layer sprinkling device certainly through stream
The reverse contact desulfuriation of magnesium hydroxide slurry under above, desulfurization fume is after demister 3, wet electrical dust precipitator demisting through on tower top
Portion's chimney emptying；In desulfuration absorbing tower groove, magnesium hydroxide slurry is fully stirred through lateral agitating device, is effectively prevented not
The deposition of molten particle, while the magnesium sulfite formed after desulfurization is under the oxidation of oxidation and aeration device, increasingly generates solubility high
Adlerika；Entrance SO2Concentration detector and outlet SO2Concentration detector respectively with sodium hydroxide automatic control adjustable valve signal
Interlocking, as entrance SO2Concentration or outlet SO2When concentration exceedes setting value, sodium hydroxide automatic control adjustable valve is automatically turned on, to desulfurization
Absorption tower adds sodium hydroxide, it is ensured that flue gas qualified discharge；Absorption tower circulating pump conveys magnesium hydroxide slurry to Multi-layer sprinkling and filled
Put, control is adjusted in the spraying layer control valve that magnesium hydroxide slurry is had by every layer respectively, can be according to spuious flue gas during smelting SO2
The number of plies of concentration, large-minded minor adjustment spray；When magnesium hydroxide slurry tends to saturation, it is delivered to by absorption tower circulating pump de-
Sulphur liquid storage pool, is delivered to filter press through doctor solution filter pressing pump and carries out press filtration, filter cake is used as rich in poisonous, harmful insoluble substance
Individually processing, magnesium sulfate clear liquid can be used as sulfate system moisturizing or the production of sulfuric acid magnesium products；The qualified magnesia powder of outsourcing is unloaded
Enter in magnesium oxide slaking groove and add water, cured under steam heating, stirring condition, through magnesium oxide slaking after curing is qualified
It is pumped into magnesium hydroxide slurries liquid bath stand-by, being delivered to magnesium hydroxide slurry spray at smoke inlet through magnesium hydroxide slurries liquid pump fills
Put, flue gas is pre-processed, while according to saturation doctor solution emission behaviour, being mended in time to the slurries in desulfuration absorbing tower
Fill.
It is preferred that, the Multi-layer sprinkling device has three layers.
Further, the oxidation and aeration device sets three sets, and air gun is separated by 120 degree of arrangements on same circumference.
Further, the lateral agitating device sets three sets, and paddle is located at below air gun.
Based on the desulfurizing agent that this method is used is absorbed with magnesium hydroxide, supplemented by sodium hydroxide, according to flue gas SO2Concentration and
When addition amount of sodium hydroxide is adjusted；The desulfuration absorbing tower used is using " absorption-dedusting-demisting-emptying " integration
Structure, effectively by SO in flue gas2The functions such as absorption, dedusting, demisting, emptying are integrated in one, and shorten technological process, reduce once
Investment；Desulfuration absorbing tower entrance installs temperature flue gas cooling device, adds the adaptability to discontinuity pyrolytic semlting flue gas；
Desulfuration absorbing tower bottom increases lateral agitating device and aerating oxidation device, can effectively make sl. sol. magnesium sulfite in absorption tower
It is sufficiently converted into readily soluble magnesium sulfate, it is to avoid the deposition of the insoluble matter such as flue dust, oxidation magnesium addition.Pressed by being used to doctor solution
The mode of filter can realize the separation of insoluble matter and Adlerika, and magnesium sulfate clear liquid can be used as sulfate system moisturizing or magnesium sulfate production
The production of product.
The beneficial effects of the invention are as follows：The method of the present invention, using magnesium hydroxide as desulfurizing agent, all the period of time improvement up to standard
The complicated flue gas during smelting of method processing, processing cost is low, and effect is notable.Complicated flue gas during smelting high temperature period, atm number, height can be met
Concentration SO2The processing of the particular time flue gases such as discharge, can efficiently separate out the poisonous, harmful heavy metal and magnesia in doctor solution
In insoluble matter, reclaim magnesium sulfate clear liquid can be used as sulfate system moisturizing or the production of sulfuric acid magnesium products, economic benefit, Environmental Effect
It is beneficial notable.
Brief description of the drawings
Fig. 1 is apparatus and process flow chart of the invention；
In figure, 1-desulfuration absorbing tower；2-Flue Gas Forced Draft Fan；3-demister；4-wet electrical dust precipitator；5-Multi-layer sprinkling
Device；6-stream carries effect tower tray；7-air gun；8-lateral agitating device；9-spraying layer control valve；10-entrance SO2
Concentration detector；11-outlet SO2Concentration detector；12-absorption tower circulating pump；13-oxidation fan；14-sodium hydroxide is certainly
Control regulation valve；15-sodium hydroxide storage tank；16-magnesium hydroxide slurries liquid pump；17-magnesium hydroxide slurries liquid bath；18-magnesia is ripe
Change pump；19-magnesium oxide slaking groove；20-doctor solution storage pool；21-filter press；22-doctor solution filter pressing pump；23-chimney；
24-magnesium hydroxide slurry spray equipment；25-valve.
Embodiment
It is described with reference to the drawings and technical scheme is described further.
As illustrated, a kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method, the equipment that its processing procedure is set
Including：Desulfuration absorbing tower 1, Flue Gas Forced Draft Fan 2, demister 3, wet electrical dust precipitator 4, Multi-layer sprinkling device 5, stream carry effect tower
Disk 6, air gun 7, lateral agitating device 8, spraying layer control valve 9, entrance SO2Concentration detector 10, outlet SO2Concentration Testing
Instrument 11, absorption tower circulating pump 12, oxidation fan 13, sodium hydroxide automatic control adjustable valve 14, sodium hydroxide storage tank 15, magnesium hydroxide slurries
Liquid pump 16, magnesium hydroxide slurries liquid bath 17, magnesium oxide slaking pump 18, magnesium oxide slaking groove 19, doctor solution storage pool 20, filter press
21st, doctor solution filter pressing pump 22, chimney 23, magnesium hydroxide slurry spray equipment 24；The gas approach front end of desulfuration absorbing tower 1 sets cigarette
Magnesium hydroxide slurry spray equipment 24 is installed, flue gas enters at gas conveying fan 2, the tower body middle and lower part gas approach of desulfuration absorbing tower 1
Entrance SO is installed on tracheae2Concentration detector 10, sodium hydroxide storage tank 15 enters the bottom of desulfuration absorbing tower 1 by pump, pipeline communication
And the pipeline of connection is provided with sodium hydroxide automatic control adjustable valve 14, SO is exported2Concentration detector 11 is located in chimney 23, entrance SO2
Concentration detector 10 and outlet SO2Concentration detector 11 respectively with the interlocking of signals of sodium hydroxide automatic control adjustable valve 14；The desulfurization
Demister 3, Multi-layer sprinkling device 5, stream is set to carry effect tower tray 6 inside the tower body of absorption tower 1 respectively from top to bottom；The desulfurization is inhaled
It is chimney 23 to receive the top of demister 3 inside the tower body of tower 1 and set above wet electrical dust precipitator 4, wet electrical dust precipitator；The desulfurization
The bottom of absorption tower 1 sets oxidation and aeration device, and the oxidation and aeration device includes oxidation fan 13, air gun 7, aeration air
Supervisor, aeration air branch pipe, aeration air supervisor are placed in tower in the middle part of slurry layer, and one end is connected with oxidation fan 13, the other end
It is connected by aerating oxidation branch pipe with air gun 7, the bottom of desulfuration absorbing tower 1 also sets up lateral agitating device 8；Magnesia
Digester 19 is connected by pipeline with magnesium oxide slaking pump 18, and the magnesium oxide slaking outlet of pump 18 is connected to magnesium hydroxide slurries liquid bath
17, magnesium hydroxide slurries liquid bath 17 is the feed flow of magnesium hydroxide slurry spray equipment 24 at smoke inlet by magnesium hydroxide slurries liquid pump 16
Magnesium hydroxide slurry is supplemented with desulfuration absorbing tower 1 and is provided with valve for the pipeline that desulfuration absorbing tower 1 supplements magnesium hydroxide slurry；Position
Absorption tower circulating pump 12 in the bottom of desulfuration absorbing tower 1 is exported, and separates two branch roads, Multi-layer sprinkling device 5, every layer are connected to all the way
Control is adjusted by spraying layer control valve 9 respectively, another road is connected on doctor solution storage pool 20 and connecting line and sets valve；It is described
Doctor solution storage pool 20 is connected through doctor solution filter pressing pump 22 with filter press 21.
Technological process includes：After the spuious flue gas during smelting of atm number is pressurized through Flue Gas Forced Draft Fan 2, through magnesium hydroxide slurry
After spray equipment 24 is pre-processed, enter tower body from the middle and lower part of desulfuration absorbing tower 1, effect tower tray 6 is carried with coming from Multi-layer sprinkling through stream
The reverse contact desulfuriation of top-down magnesium hydroxide slurry of device 5, desulfurization fume is after demister 3, the demisting of wet electrical dust precipitator 4
Emptied through tower top top chimney 23；In the tower groove of desulfuration absorbing tower 1, magnesium hydroxide slurry is fully stirred through lateral agitating device 8,
The deposition of insoluble particles effectively is prevented, while the magnesium sulfite formed after desulfurization is under the oxidation of oxidation and aeration device, gradually
Generate the high Adlerika of solubility；Entrance SO2Concentration detector 10 and outlet SO2Concentration detector 11 respectively with hydroxide
The interlocking of signals of sodium automatic control adjustable valve 14, as entrance SO2Concentration or outlet SO2When concentration exceedes setting value, sodium hydroxide is automatically turned on
Automatic control adjustable valve 14, adds sodium hydroxide solution, it is ensured that flue gas qualified discharge to desulfuration absorbing tower 1；Absorption tower circulating pump 12
Magnesium hydroxide slurry is delivered to three layers of spray equipment 5, the spraying layer control valve 9 that magnesium hydroxide slurry is had by every layer respectively in tower
Control is adjusted, can be according to spuious flue gas during smelting SO2The number of plies of concentration, large-minded minor adjustment spray；Work as magnesium hydroxide slurry
When tending to saturation, doctor solution storage pool 20 is delivered to by absorption tower circulating pump 12（Open on the pipe of connection doctor solution storage pool 20
Valve, this valve is when magnesium hydroxide slurry is unsaturated in closing）, the slurries into doctor solution storage pool 20 are through doctor solution
Filter pressing pump 22 is delivered to filter press 21 and carries out press filtration, is individually handled as filter cake rich in poisonous, harmful insoluble substance, magnesium sulfate
Clear liquid can be used as sulfate system moisturizing or the production of sulfuric acid magnesium products；The qualified magnesia powder of outsourcing is discharged into magnesium oxide slaking groove 19
It is interior and add water, cured under steam heating, stirring condition, hydrogen-oxygen is transported to through magnesium oxide slaking pump 18 after curing is qualified
Change magnesium slurry tank 17 stand-by, magnesium hydroxide slurry spray equipment 24 at smoke inlet is delivered to through magnesium hydroxide slurries liquid pump 16, it is right
Flue gas is pre-processed, while according to saturation doctor solution emission behaviour, the valve 25 opened in time on feed tube absorbs to desulfurization
Slurries are supplemented in tower 1.
Further, the oxidation and aeration device sets three sets, and air gun 7 is separated by 120 degree of arrangements on same circumference,
So that oxidation is more rapidly uniform.
Further, the lateral agitating device 8 sets three sets, and paddle is located at the lower section of air gun 7, with air gun
7 are engaged.
Embodiment 1
It is prepared by magnesium hydroxide slurry：The qualified magnesia powder of outsourcing and new water are first added into magnesium oxide slaking groove 19 by a certain percentage
It is interior, lead to steam, open stirring, cure 2h, 12% magnesium hydroxide slurry is made, oxidized magnesium curing pump 18 is transported to magnesium hydroxide
Slurry tank 17 is stand-by.During normal production, lateral agitating device 8 is opened, oxidation and aeration device is opened, sky is blasted by air gun 7
Gas.Open absorption tower circulating pump 12 and convey magnesium hydroxide slurry to multilayer spray equipment 5, regulation spraying layer control valve 9 opens three
Layer is sprayed.Smelt spuious flue gas（The Nm of tolerance about 600,0003/ h, SO2Concentration is 1057-3500mg/Nm3, it is average to be about
3000mg/Nm3, 50 ± 10 DEG C of temperature）After being pressurized through Flue Gas Forced Draft Fan 2, enter tower body from the middle and lower part of desulfuration absorbing tower 1, pass through
Stream is carried after effect tower tray 6 is evenly distributed and inversely contacted with from the top-down magnesium hydroxide slurry of Multi-layer sprinkling device 5, hydrogen-oxygen
Change magnesium slurries by the SO in flue gas2Absorb.Flue gas after desulfurization is after demister 3, the demisting of wet electrical dust precipitator 4 through tower top upper smoke
Chimney 23 is emptied.By exporting SO2Concentration detector 11 is constantly detected, shows SO2Concentration substantially remains in 150mg/Nm3, satisfaction reaches
Mark discharge standard.Desulfurization slurry solid content is relatively low in tower, does not precipitate and is sunken to bottom of towe, and all pipelines are without clogging.Work as hydrogen
When magnesia slurry PH reaches 6, saturated solution is delivered to doctor solution storage pool 20 by absorption tower circulating pump 12, when desulfuration absorbing tower 1
Interior saturation doctor solution stops conveying saturated solution when being emitted into 0.5 meter of high level, magnesium hydroxide slurries liquid pump 16 is mended to desulfuration absorbing tower 1
Magnesia slurry is flushed with hydrogen to technological requirement.Doctor solution storage pool 20 opens doctor solution filter pressing pump 22 by doctor solution to certain liquid level
It is delivered to filter press 21 and carries out press filtration, is individually handled as filter cake rich in poisonous, harmful insoluble substance, magnesium sulfate clear liquid can use
Make sulfate system moisturizing or the production of sulfuric acid magnesium products.
Embodiment 2
During improper production, the spuious Nm of flue gas tolerance about 400,000 is smelted3/ h, SO2Concentration is 6000-8500mg/Nm3, it is average to be about
7000mg/Nm3, 200-280 DEG C of temperature.Lateral agitating device 8 is opened, oxidation and aeration device is opened, sky is blasted by air gun 7
Gas.Magnesium hydroxide slurries liquid pump 16 is opened, conveying magnesium hydroxide slurry to smoke inlet magnesium hydroxide slurry spray equipment 24 is carried out
Flue gas spraying cooling, opens absorption tower circulating pump 12 and conveys magnesium hydroxide slurry to spraying layer 5, adjust each layer spraying layer control valve
9, open two layers and sprayed.Spuious flue gas is smelted after the supercharging of Flue Gas Forced Draft Fan 2, through magnesium hydroxide slurry spray equipment 24
After cooling washing, enter tower body from the middle and lower part of desulfuration absorbing tower 1, carried through stream after effect tower tray 6 is evenly distributed with coming from multilayer spray
The top-down magnesium hydroxide slurry of shower device 5 is inversely contacted, and magnesium hydroxide slurry is by the SO in flue gas2Absorb.Cigarette after desulfurization
Gas is emptied after demister 3, the demisting of wet electrical dust precipitator 4 through tower top top chimney 23.As entrance SO2Concentration exceedes setting value
6500mg/Nm3Or outlet SO2Concentration is more than 150mg/Nm3When, it is delayed 2 seconds and automatically turns on sodium hydroxide automatic control adjustable valve 14, to
Desulfuration absorbing tower 1 adds sodium hydroxide, through exporting SO2Concentration detector 11 detects, SO2Concentration substantially remains in 150mg/Nm3,
Qualified discharge；When magnesium hydroxide slurry pH reaches 6, saturated solution is delivered to doctor solution storage pool 20 by absorption tower circulating pump 12,
When in desulfuration absorbing tower 1 saturation doctor solution be emitted into 0.5 meter of high level when stop conveying saturated solution, magnesium hydroxide slurries liquid pump 16 to
Desulfuration absorbing tower 1 supplements magnesium hydroxide slurry to technological requirement.Doctor solution storage pool 20 opens doctor solution press filtration to certain liquid level
Doctor solution conveying filter press 21 is carried out press filtration by pump 22, is individually handled as filter cake rich in poisonous, harmful insoluble substance, sulfuric acid
Magnesium clear liquid can be used as sulfate system moisturizing or the production of sulfuric acid magnesium products.
Embodiment 3
During improper production, the spuious Nm of flue gas tolerance about 400,000 is smelted3/ h, SO2Concentration is 835-2500mg/Nm3, it is average to be about
2000mg/Nm3, 50 ± 10 DEG C of temperature.Lateral agitating device 8 is opened, oxidation and aeration device is opened, sky is blasted by air gun 7
Gas.Open absorption tower circulating pump 12 and convey magnesium hydroxide slurry to spraying layer 5, regulation individual layer spraying layer control valve 9 opens two layers
Sprayed.Spuious flue gas is smelted after the supercharging of Flue Gas Forced Draft Fan 2, enters tower body from the middle and lower part of desulfuration absorbing tower 1, through flowing
Carry after effect tower tray 6 spreads uniformly and inversely being contacted with from the top-down magnesium hydroxide slurry of Multi-layer sprinkling device 5, magnesium hydroxide
Slurries are by the SO in flue gas2Absorb.Flue gas after desulfurization is after demister 3, the demisting of wet electrical dust precipitator 4 through tower top top chimney 23
Emptying.By exporting SO2Concentration detector 11 is constantly detected, shows SO2Concentration substantially remains in 150mg/Nm3, meet row up to standard
Put standard.Desulfurization slurry solid content is relatively low in tower, does not precipitate and is sunken to bottom of towe, and all pipelines are without clogging.Work as hydroxide
When magnesium slurries PH reaches 6, saturated solution is delivered to doctor solution storage pool 20 by absorption tower circulating pump 12, when full in desulfuration absorbing tower 1
Stop conveying saturated solution when being emitted into 0.5 meter of high level with doctor solution, magnesium hydroxide slurries liquid pump 16 supplements hydrogen to desulfuration absorbing tower 1
Magnesia slurry is to technological requirement.Doctor solution storage pool 20 opens doctor solution filter pressing pump 22 and conveys doctor solution to certain liquid level
Filter press 21 carries out press filtration, is individually handled as filter cake rich in poisonous, harmful insoluble substance, magnesium sulfate clear liquid can be used as sulfuric acid
The production of system water supplement or sulfuric acid magnesium products.
Claims (4)
1. a kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method, it is characterized in that：The equipment bag that its processing procedure is set
Include：Desulfuration absorbing tower（1）, Flue Gas Forced Draft Fan（2）, demister（3）, wet electrical dust precipitator（4）, Multi-layer sprinkling device（5）,
Stream carries effect tower tray（6）, air gun（7）, lateral agitating device（8）, spraying layer control valve（9）, entrance SO2Concentration detector
（10）, outlet SO2Concentration detector（11）, absorption tower circulating pump（12）, oxidation fan（13）, sodium hydroxide automatic control adjustable valve
（14）, sodium hydroxide storage tank（15）, magnesium hydroxide slurries liquid pump（16）, magnesium hydroxide slurries liquid bath（17）, magnesium oxide slaking pump（18）、
Magnesium oxide slaking groove（19）, doctor solution storage pool（20）, filter press（21）, doctor solution filter pressing pump（22）, chimney（23）, hydroxide
Magnesium slurries spray equipment（24）；Desulfuration absorbing tower（1）Gas approach front end sets Flue Gas Forced Draft Fan（2）, desulfuration absorbing tower（1）
Magnesium hydroxide slurry spray equipment is installed at the gas approach of tower body middle and lower part（24）, entrance SO is installed on smoke inlet pipe2Concentration
Detector（10）, sodium hydroxide storage tank（15）Desulfuration absorbing tower is entered by pump, pipeline communication（1）Set on the pipeline of bottom and connection
There is sodium hydroxide automatic control adjustable valve（14）, export SO2Concentration detector（11）It is located at chimney（23）It is interior, entrance SO2Concentration detector
（10）With outlet SO2Concentration detector（11）Respectively with sodium hydroxide automatic control adjustable valve（14）Interlocking of signals；The desulfurization absorbs
Tower（1）Demister is set respectively from top to bottom inside tower body（3）, Multi-layer sprinkling device（5）, stream carry effect tower tray（6）；It is described de-
Sulphur absorption tower（1）Demister inside tower body（3）Top sets wet electrical dust precipitator（4）, wet electrical dust precipitator top is chimney
（23）；The desulfuration absorbing tower（1）Bottom sets oxidation and aeration device, and the oxidation and aeration device includes oxidation fan（13）、
Air gun（7）, aeration air supervisor, aeration air branch pipe, aeration air supervisor is placed in tower in the middle part of slurry layer, one end and oxygen
Wind transmission machine（13）Connection, the other end passes through aerating oxidation branch pipe and air gun（7）Connection, the desulfuration absorbing tower（1）Bottom
Also set up lateral agitating device（8）；Magnesium oxide slaking groove（19）Pass through pipeline and magnesium oxide slaking pump（18）Connection, the oxidation
Magnesium cures pump（18）Outlet is connected to magnesium hydroxide slurries liquid bath（17）, magnesium hydroxide slurries liquid bath（17）Pass through magnesium hydroxide slurries liquid pump
（16）For magnesium hydroxide slurry spray equipment at smoke inlet（24）Feed flow and desulfuration absorbing tower（1）Supplement magnesium hydroxide slurry and
For desulfuration absorbing tower（1）The pipeline for supplementing magnesium hydroxide slurry is provided with valve；Positioned at desulfuration absorbing tower（1）The absorption tower of bottom is followed
Ring pump（12）Outlet, separates two branch roads, Multi-layer sprinkling device is connected to all the way（5）, every layer respectively by spraying layer control valve（9）Enter
Row regulation control, another road is connected to doctor solution storage pool（20）And valve is set on connecting line；The doctor solution storage pool（20）Through
Doctor solution filter pressing pump（22）With filter press（21）Connection；
Technological process includes：The spuious flue gas during smelting of atm number is through Flue Gas Forced Draft Fan（2）After supercharging, sprayed through magnesium hydroxide slurry
Shower device（24）After pretreatment, from desulfuration absorbing tower（1）Middle and lower part enters tower body, and effect tower tray is carried through stream（6）With from multilayer
Spray equipment（5）The top-down reverse contact desulfuriation of magnesium hydroxide slurry, desulfurization fume is through demister（3）, wet-esp
Device（4）Through tower top top chimney after demisting（23）Emptying；In desulfuration absorbing tower（1）In tower groove, magnesium hydroxide slurry is through laterally stirring
Mix device（8）Fully agitation, effectively prevents the deposition of insoluble particles, while the magnesium sulfite formed after desulfurization is in oxidation and aeration
Under the oxidation of device, the high Adlerika of solubility is increasingly generated；Entrance SO2Concentration detector（10）With outlet SO2Concentration is examined
Survey instrument（11）Respectively with sodium hydroxide automatic control adjustable valve（14）Interlocking of signals, as entrance SO2Concentration or outlet SO2Concentration, which exceedes, to be set
During definite value, sodium hydroxide automatic control adjustable valve is automatically turned on（14）, to desulfuration absorbing tower（1）Add sodium hydroxide, it is ensured that flue gas reaches
Mark discharge；Absorption tower circulating pump（12）Magnesium hydroxide slurry is conveyed to multilayer spray equipment（5）, magnesium hydroxide slurry is respectively by every
The spraying layer control valve that layer has（9）Control is adjusted, can be according to spuious flue gas during smelting SO2Concentration, the spray of large-minded minor adjustment
The number of plies of pouring；When magnesium hydroxide slurry tends to saturation, pass through absorption tower circulating pump（12）It is delivered to doctor solution storage pool（20）,
Through doctor solution filter pressing pump（22）It is delivered to filter press（21）Press filtration is carried out, filter cake list is used as rich in poisonous, harmful insoluble substance
Stay alone reason, magnesium sulfate clear liquid can be used as sulfate system moisturizing or the production of sulfuric acid magnesium products；The qualified magnesia powder of outsourcing is discharged into
Magnesium oxide slaking groove（19）It is interior and add water, cured under steam heating, stirring condition, it is ripe through magnesia after curing is qualified
Change pump（18）It is transported to magnesium hydroxide slurries liquid bath（17）It is stand-by, through magnesium hydroxide slurries liquid pump（16）It is delivered to hydrogen-oxygen at smoke inlet
Change magnesium slurries spray equipment（24）, flue gas is pre-processed, while according to saturation doctor solution emission behaviour, being inhaled in time to desulfurization
Receive tower（1）Interior slurries are supplemented.
2. the spuious flue gas during smelting wet dedusting of a kind of atm number according to claim 1, sulfur method, it is characterized in that：Institute
State Multi-layer sprinkling device（5）There are three layers.
3. the spuious flue gas during smelting wet dedusting of a kind of atm number according to claim 1, sulfur method, it is characterized in that：Institute
State oxidation and aeration device and three sets, air gun are set（7）It is separated by 120 degree of arrangements on same circumference.
4. the spuious flue gas during smelting wet dedusting of a kind of atm number according to claim 1, sulfur method, it is characterized in that：Institute
State lateral agitating device（8）Three sets are set, paddle is located at air gun（7）Lower section.
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| CN107930372A (en) * | 2017-12-29 | 2018-04-20 | 西安长庆科技工程有限责任公司 | A kind of integrated device and methods for using them based on triazine solution desulfurization |
| CN108159854A (en) * | 2017-11-28 | 2018-06-15 | 江苏民生重工有限公司 | A kind of coal-burning boiler wet desulfurization system |
| CN108380024A (en) * | 2018-04-13 | 2018-08-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of desulphurizing and dust-removing integral cylindric heater system and its desulfurization and dust-removal method |
| CN108854499A (en) * | 2018-08-09 | 2018-11-23 | 河南禾力能源股份有限公司 | A kind of furfural dregs boiler smoke magnesia FGD purification device |
| CN111097280A (en) * | 2019-12-23 | 2020-05-05 | 四川天壹环保科技有限公司 | Anti-sedimentation arrangement process for slurry of internal circulation desulfurization tower |
| CN113813756A (en) * | 2021-10-20 | 2021-12-21 | 国家能源集团重庆恒泰发电有限公司 | Flue gas purification system of coal-fired unit |
| CN115032330A (en) * | 2021-12-28 | 2022-09-09 | 大连亚泰科技新材料股份有限公司 | Testing machine for testing desulfurization effect of desulfurizing agent |
| CN115193233A (en) * | 2022-08-25 | 2022-10-18 | 金川集团股份有限公司 | Smelting flue gas treatment system and method |
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| CN108159854A (en) * | 2017-11-28 | 2018-06-15 | 江苏民生重工有限公司 | A kind of coal-burning boiler wet desulfurization system |
| CN107930372A (en) * | 2017-12-29 | 2018-04-20 | 西安长庆科技工程有限责任公司 | A kind of integrated device and methods for using them based on triazine solution desulfurization |
| CN108380024A (en) * | 2018-04-13 | 2018-08-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of desulphurizing and dust-removing integral cylindric heater system and its desulfurization and dust-removal method |
| CN108380024B (en) * | 2018-04-13 | 2024-01-09 | 中冶焦耐(大连)工程技术有限公司 | Desulfurizing and dedusting integrated cylinder heating furnace system and desulfurizing and dedusting method thereof |
| CN108854499A (en) * | 2018-08-09 | 2018-11-23 | 河南禾力能源股份有限公司 | A kind of furfural dregs boiler smoke magnesia FGD purification device |
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| CN113813756A (en) * | 2021-10-20 | 2021-12-21 | 国家能源集团重庆恒泰发电有限公司 | Flue gas purification system of coal-fired unit |
| CN115032330A (en) * | 2021-12-28 | 2022-09-09 | 大连亚泰科技新材料股份有限公司 | Testing machine for testing desulfurization effect of desulfurizing agent |
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| CN115193233A (en) * | 2022-08-25 | 2022-10-18 | 金川集团股份有限公司 | Smelting flue gas treatment system and method |
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