CN110433637A - A kind of Method of Soda flue gas desulfurization device and technique - Google Patents
A kind of Method of Soda flue gas desulfurization device and technique Download PDFInfo
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- CN110433637A CN110433637A CN201910692060.7A CN201910692060A CN110433637A CN 110433637 A CN110433637 A CN 110433637A CN 201910692060 A CN201910692060 A CN 201910692060A CN 110433637 A CN110433637 A CN 110433637A
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- desulfurizing tower
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- flue gas
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000003546 flue gas Substances 0.000 title claims abstract description 40
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 39
- 230000023556 desulfurization Effects 0.000 title claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 99
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 52
- 230000003647 oxidation Effects 0.000 claims abstract description 50
- 238000004140 cleaning Methods 0.000 claims abstract description 40
- 230000008676 import Effects 0.000 claims abstract description 39
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003513 alkali Substances 0.000 claims abstract description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- 238000013329 compounding Methods 0.000 claims abstract description 19
- 239000011734 sodium Substances 0.000 claims abstract description 9
- 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 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 239000007791 liquid phase Substances 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 34
- 235000017550 sodium carbonate Nutrition 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 29
- 239000007921 spray Substances 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 17
- 239000013505 freshwater Substances 0.000 claims description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000012716 precipitator Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002745 absorbent Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000007832 Na2SO4 Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001212038 Arcola Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003863 metallic catalyst Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/73—After-treatment of removed components
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- 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)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of Method of Soda flue gas desulfurization devices, which is characterized in that including being used for SO2It is dissolved in pretreatment system, desulfurizing tower, technique water conveying system, the sodium carbonate compounding system for providing lye and the oxidation cycle system for oxidative sodium of liquid phase water, chimney is equipped at the top of desulfurizing tower, demister is equipped with below chimney, desulfurizing tower is connect with technique water conveying system and sodium carbonate compounding system respectively, desulfurizing tower tower reactor position is equipped with the gas-liquid import of tower reactor side wall, desulfurization tower bottom is exported equipped with cleaning solution, and cleaning solution outlet is connect by oxidation cycle system with tower reactor side wall gas-liquid import；The pretreatment system is venturi pretreatment system or hollow-spraying-tower pretreatment system.The present invention is substantially reduced at low cost with alkali, realizes the safety of desulfurization technology, stability, takes into account economy, is suitble to promote and apply.
Description
Technical field
The present invention relates to soda ash flue gas desulfurization fields, and in particular to the flue gas desulfurization of oil plant catalytic regeneration and power plant's oil firing slurry
Boiler flue gas desulfurization.
Background technique
Country's catalytic regeneration flue gas desulfurization at present and power plant's oil firing slurry boiler flue gas desulfurization use 2 kinds of techniques, and one kind is source
In the injection venturi sulfur removal technology of WGS, one kind is, derived from EDV hollow-spraying-tower sulfur removal technology, two kinds of techniques being all made of hydroxide
Sodium is as desulfurizing agent.The advantages of sodium method is with other methods is as follows: 1, using calcium method, magnesium processes or Dual alkali because have calcium, magnesium from
Bringing into for son, be easy to cause the blocking of tower and pipeline, very risky.2, for catalytic unit, contain metallic catalyst in flue gas
Particulate matter, because belonging to dangerous waste containing heavy metal, processing cost can compare the solid waste generated using calcium method, magnesium processes or double alkali method desulfurizing
Sodium Fa Genggao.So oil plant, which generallys use sodium hydroxide as desulfurizing agent, carries out flue gas desulfurization, however sodium hydroxide is as de-
The cost of sulphur agent is very high, therefore is badly in need of developing a kind of novel flue gas desulfurization facilities, is solving the problems, such as that desulfurizing agent is at high cost
Meanwhile while it not will cause the problem of for example blocking and increasing dangerous waste treating capacity.
Application No. is: 201610590946.7, applying date 2016.07.26, entitled arcola Method of Soda desulfurizer
Chinese invention patent, although desulfurization can be solved the problems, such as with soda ash, whole device is complicated, takes up a large area, circulating pump
Energy consumption is high, at high cost with oxygen, and the indefinite risk that will cause particle content height and chimney rain in flue gas of demister pattern, no
It is practiced conducive in the production of medium-and-large-sized refinery.And flue gas desulfurization is carried out using sodium carbonate, industrial sodium carbonate is purchased in also reply
Standard class and the concentration of outlet salt water are required, and otherwise will cause the impurity chloride ion in sodium carbonate in the richness of desulfurizing tower
Collection, causes significant corrosion problems, brings great security risk.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, provide a kind of Method of Soda flue gas desulfurization device and
Technique.
In order to achieve the above object, the present invention provides a kind of Method of Soda flue gas desulfurization devices, which is characterized in that including with
In by SO2It is dissolved in the pretreatment system of liquid phase water, desulfurizing tower, technique water conveying system, matches for providing the sodium carbonate of lye
System processed and oxidation cycle system for oxidative sodium are equipped with chimney at the top of desulfurizing tower, are equipped with demister below chimney,
Desulfurizing tower is connect with technique water conveying system and sodium carbonate compounding system respectively, and desulfurizing tower tower reactor position is equipped with tower reactor side wall gas-liquid
Import, desulfurization tower bottom are exported equipped with cleaning solution, and cleaning solution outlet is connected by oxidation cycle system and the gas-liquid import of tower reactor side wall
It connects；The pretreatment system is venturi pretreatment system or hollow-spraying-tower pretreatment system.
Preferably, the hollow-spraying-tower pretreatment system includes being located at chilling circulating pump outside desulfurizing tower, being located at desulfurization
Chilling nozzle in tower, the gas inlet being located in desulfurizing tower tower wall；The gas inlet is located at desulfurizing tower bottoms level or more,
Chilling nozzle is located above gas inlet, the import connection cleaning solution outlet of chilling circulating pump, the outlet connection of chilling circulating pump
Chilling nozzle；The exit of the chilling circulating pump is equipped with the discharge outlet for discharging brackish water.
It is highly preferred that the desulfurizing tower further includes the collecting tank and spray spout in desulfurizing tower, it is located at desulfurizing tower side
The first alkali liquor inlet, the second alkali liquor inlet, fresh water inlet on wall, the cleaning circulation pump being located at outside desulfurizing tower；Collecting tank
Between chilling nozzle and demister, the second alkali liquor inlet, fresh water inlet and spray spout are respectively positioned on collecting tank and demisting
Between device, the first alkali liquor inlet is located at below smoke inlet, and sodium carbonate compounding system passes through the first alkali liquor inlet and second respectively
Alkali liquor inlet is connect with desulfurizing tower, and technique water conveying system is connect by fresh water inlet with desulfurizing tower, cleaning circulation pump into
Mouth is connect with the outlet at bottom of collecting tank, and the outlet of cleaning circulation pump is connect with spray spout；Desulfurizing tower tower reactor and collecting tank it
Between be equipped with liquid level communicating pipe.
Further, the spray spout uses the two-way atomizer of 4~7 rows, closes centered on two-way atomizer, double
To injection, 140~145 ° of jet angle of vortex silicon carbide nozzle.
Preferably, the venturi pretreatment system includes the venturi-type eductors and wash cycle being located at outside desulfurizing tower
Pump, the gas-liquid import being located inside desulfurizing tower；The gas-liquid import is located at desulfurizing tower bottoms level or more, and cleaning solution is exported and washed
The entrance connection of circulating pump is washed, the outlet of cleaning circulation pump and the entrance of venturi-type eductors connect, and venturi-type eductors go out
Mouth is connect with gas-liquid import, and venturi-type eductors are equipped with gas inlet；The gas-liquid import uses tangential feed mode；It is described
The exit of cleaning circulation pump is equipped with the discharge outlet for discharging brackish water.
It is highly preferred that the desulfurizing tower further includes the gas distributing disc for redistributing gas flow, desulfurizing tower tower reactor
Liquid level communicating pipe is equipped between gas distributing disc.
Preferably, the demister is the combination knot of eddy flow spiral demister or eddy flow spiral demister and wet electric precipitator
Structure, defogging effect require partial size at 30 μm or less.
Preferably, the oxidation cycle system includes oxidation cycle pump and oxidation jet nozzle, the import of oxidation cycle pump
Cleaning solution outlet is connected, the import of the outlet connection oxidation jet nozzle of oxidation cycle pump aoxidizes the outlet connection of jet nozzle
Tower reactor side wall gas-liquid import, the oxidation jet nozzle use venturi undergauge, expanding structure.
Preferably, the sodium carbonate compounding system, using facilities such as screw conveyor, feed bin, star-like feeders, to reduce
Artificial intensity and increase automatization level.
The present invention also provides a kind of Method of Soda flue gas desulfurization techniques, which is characterized in that de- using above-mentioned Method of Soda flue gas
Sulphur carries out desulfurization, comprising the following steps:
Step 1: circulation fluid being broken by micron order drop by pretreatment system, flue gas with micron order drop by connecing
Touching, by the SO in flue gas2It is dissolved in micron order drop, enters desulfurizing tower tower reactor after circulation fluid is cooling；
Step 2: being mixed, carried out with the circulation fluid in desulfurizing tower tower reactor by the way that sodium carbonate compounding system is prepared soda ash solution
Neutralization reaction generates Na2SO3；
Step 3: the circulation fluid in desulfurizing tower tower reactor being aoxidized by oxidation cycle system, in oxidation cycle system
Jet nozzle is aoxidized by the air in suction atmosphere, and bubble breaking is gone out at minimum microbubble from oxidation jet nozzle
The circulation fluid come enters side wall gas-liquid import, then in thionizer liquid level Na accomplished below2SO3Oxidation.
Step 4: flue gas is by the way that, through smoke stack emission, outlet salt water passes through the outlet salt mouth of a river and is discharged after demister demisting.
Preferably, the content of sodium chloride as impurity is no more than 1wt% in sodium carbonate in the step 2.
Preferably, corrosion caused by being enriched in order to avoid chloride ion, it is desirable that the content (quality of sodium chloride as impurity in sodium carbonate
Score) with outlet salt water in sodium chloride concentration (mass fraction) ratio no more than 1:5.
Compared with prior art, the beneficial effects of the present invention are:
The present invention includes hollow-spraying-tower pretreatment system and injection two kinds of technical solutions of venturi pretreatment system, and structure is tight
It gathers, without fan noise, low energy consumption, investment is low, with alkali is at low cost, the effect of sewage discharge and sodium method is just the same.Void tower spray
Low, high concentration region is divided into the desulfurization of leaching pretreatment system, and desulfurizing tower tower reactor is high concentration region, and brackish water concentration of emission is high, after
Do not increase energy consumption when continuous evaporative crystallization, reduces desulphurization cost.The present invention is substantially reduced at low cost with alkali, realizes desulfurization technology
Safety, stability, take into account economy, are suitble to promote and apply.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of hollow-spraying-tower pretreatment system technical solution of the present invention；
Fig. 2 is the structural schematic diagram of present invention injection venturi pretreatment system technical solution；
Description of symbols: gas inlet 1, desulfurizing tower 2, chilling nozzle 3, collecting tank 4, spray spout 5, demister 6, liquid
Position communicating pipe 7, the second alkali liquor inlet 8, fresh water inlet 9, tower reactor side wall gas-liquid import 10, cleaning solution export 11, wash cycle
Pump 12, oxidation cycle pump 13, oxidation jet nozzle 14, chilling circulating pump 15, technique water conveying system 16, sodium carbonate compounding system
17, the first alkali liquor inlet 18, discharge outlet 19, venturi-type eductors 20, gas-liquid import 21, gas distributing disc 22, chimney 23.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
As shown in Figure 1, being the structural schematic diagram of hollow-spraying-tower pretreatment system technical solution, specific embodiment is using such as
Lower technical solution: including gas inlet 1, desulfurizing tower 2, chilling nozzle 3, collecting tank 4, spray spout 5, demister 6, liquid level connection
Pipe 7, the second alkali liquor inlet 8, fresh water inlet 9, tower reactor side wall gas-liquid import 10, cleaning solution export 11, cleaning circulation pump 12, oxygen
Change circulating pump 13, oxidation jet nozzle 14, chilling circulating pump 15, technique water conveying system 16, sodium carbonate compounding system 17, first
Alkali liquor inlet 18, discharge outlet 19, chimney 23；Chimney 23 is equipped at the top of desulfurizing tower 2, desulfurization tower bottom is equipped with cleaning solution outlet 11,
Demister 6 is set to inside desulfurizing tower 2, is located at 23 lower section of chimney；
Gas inlet 1 is set to 2 side wall of desulfurizing tower, and is located at 2 bottoms level of desulfurizing tower or more；Chilling nozzle 3 is set to desulfurization
Inside tower 2, it is located at 1 or more gas inlet；Collecting tank 4 is set to inside desulfurizing tower 2, is located at 3 or more chilling nozzle；Second lye enters
Mouth 8 is set to 2 side wall of desulfurizing tower, between collecting tank 4 and demister 6；Fresh water inlet 9 is set to 2 side wall of desulfurizing tower, is located at collection
Between liquid bath 4 and demister 6, and in the second 8 or more alkali liquor inlet；Spray spout 5 be set to desulfurizing tower 2 inside, collecting tank 4 with remove
Between day with fog 6；4 outlet at bottom of collecting tank is connect with 12 import of cleaning circulation pump, and spray spout 5 and the outlet of cleaning circulation pump 12 connect
It connects；2 tower reactor bottom of desulfurizing tower is provided with cleaning solution outlet 11；Cleaning solution outlet 11 is recycled with oxidation cycle pump 13, chilling respectively
15 imports connection is pumped, the outlet of chilling circulating pump 15 is connect with chilling nozzle 3,13 outlet of oxidation cycle pump and oxidation jet nozzle 14
Connection, the outlet of oxidation jet nozzle 14 are connect with desulfurizing tower tower reactor side wall gas-liquid import 10；Sodium carbonate compounding system 17 leads to respectively
Cross the first alkali liquor inlet 18, the second alkali liquor inlet 8 is connect with tower reactor 2, the use of sodium carbonate compounding system 17 screw conveyor, material
The facilities such as storehouse, star-like feeder, to reduce artificial intensity and increase automatization level；Process water delivery system outside desulfurizing tower 2
System 16 is connect by fresh water inlet 9 with desulfurizing tower 2, and liquid level communicating pipe 7 connects the liquid level of collecting tank 4 and 2 tower reactor of desulfurizing tower；It is anxious
15 outlet of SAPMAC method pump is equipped with discharge outlet 19.
Demister 6 eddy flow spiral demister and the wet electric precipitator composite structure.
The structure of the oxidation jet nozzle 14 uses venturi undergauge, expanding structure.
Second alkali liquor inlet 8 is 5-15wt% for conveying low-concentration alkali liquor, soda ash concentration range, and the first lye enters
Mouth 18 is 15~25wt% for conveying high-concentration alkali liquor, concentration range.
The working principle of the present embodiment is as follows:
It is catalyzed flue gas or boiler smoke and desulfurizing tower 2 is entered by gas inlet 1, the circulation fluid sprayed with chilling nozzle 3
Reverse contact, because of flue gas cool-down, the partial moisture in circulation fluid is vaporized, and circulation fluid concentration enters tower reactor, and flue gas passes through collecting tank 4
Air rising hole enter desulfurizing tower middle and upper part, with spray spout 5 spray alkaline circulation fluid inversely contact high-efficiency desulfurization, flue gas is through removing
Through smoke stack emission after 6 demisting of day with fog.
Desulphurization circulating liquid is divided into two regions of low concentration and high concentration by 4 structure of collecting tank being arranged inside desulfurizing tower 2,
Desulphurization circulating liquid in collecting tank 4 is low concentration region, and the desulphurization circulating liquid in 2 tower reactor of desulfurizing tower is high concentration region, utilizes this spy
Sign, can reduce the density of desulphurization circulating liquid in cleaning circulation pump 12, to reduce power consumption, while the concentration liter of outlet salt water
Height reduces the energy consumption of subsequent evaporation crystallization desalination.
The doctor solution of 2 tower reactor of desulfurizing tower returns chilling nozzle 3 through 15 boost cycle of chilling circulating pump and is used as chilling liquid, desulfurizing tower
The doctor solution of 2 tower reactors also boosts to oxidation jet nozzle 14 through oxidation cycle pump 13, and oxidation jet nozzle 14 is unique due to its
Internal structure can aspirate the air in atmosphere, and can be bubble breaking at minimum microbubble, from oxidation jet nozzle 14
Circulation fluid out enters side wall gas-liquid import 10, then in the oxidation of 2 liquid level of desulfurizing tower sodium sulfite accomplished below.Collecting tank
Washed 12 boost cycle of circulating pump of doctor solution in 4 returns spray spout 5 and is used as desulfurization spray liquid.Technique water conveying system 16
According to 2 tower reactor liquid level amount of makeup water of desulfurizing tower, sodium carbonate compounding system 17 is divided to two sections of supplement lye according to PH in 2 tower reactor of desulfurizing tower
Amount.Subsequent processing workshop section is drained into outside the COD brackish water up to standard containing suspended matter or particulate matter to continue with.
Embodiment 2
As shown in Fig. 2, for the structural schematic diagram of injection venturi pretreatment system technical solution, present embodiment is adopted
With following technical solution: including gas inlet 1, desulfurizing tower 2, demister 6, tower reactor side wall gas-liquid import 10, cleaning solution outlet 11,
Cleaning circulation pump 12, oxidation cycle pump 13, oxidation jet nozzle 14, technique water conveying system 16, sodium carbonate compounding system 17, row
The mouth of a river 19, high energy venturi-type eductors 20, gas-liquid import 21, gas distributing disc 22；Chimney 23, desulfurization are equipped at the top of desulfurizing tower 2
Tower bottom is equipped with cleaning solution outlet 11, and demister 6 is set to inside desulfurizing tower 2, is located at 23 lower section of chimney；
Gas inlet 1 is the gas phase import of high energy venturi-type eductors 20；Gas-liquid import 21 is set to inside desulfurizing tower 2, position
More than 2 bottoms level of desulfurizing tower；Gas distributing disc 22 is arranged in the middle part of desulfurizing tower 2, is located at 21 or more gas-liquid import；In gas
Demister 6 is arranged in the top of distributing disc 22；2 tower reactor of desulfurizing tower is connect with the technique water conveying system 16 outside desulfurizing tower 2；Desulfurization
2 tower reactor of tower is connect with the sodium carbonate compounding system 17 outside desulfurizing tower 2；2 tower reactor bottom of desulfurizing tower is provided with cleaning solution outlet 11,
Cleaning solution outlet 11 is connected with cleaning circulation pump 12 and oxidation cycle pump 13 respectively, the outlet of cleaning circulation pump 12 and high energy text mound
In 20 fluid inlet of injector connect, oxidation cycle pump 13 outlet with oxidation jet nozzle 14 connect, aoxidize jet nozzle 14 go out
Mouth is connect with desulfurizing tower tower reactor tower reactor side wall gas-liquid import 10；The exit of cleaning circulation pump 12 is equipped with for discharging brackish water
Discharge outlet 19；
The structure for aoxidizing jet nozzle 14 uses venturi undergauge, expanding structure；High energy venturi-type eductors 20 are using high
The technique of press liquid jet atomization liquid absorption gas；The gas-liquid import 21 of desulfurizing tower uses tangential feed mode；Demister 6 is used
Eddy flow spiral demister；Sodium carbonate compounding system 17, using facilities such as screw conveyor, feed bin, star-like feeders, to reduce people
Work intensity and increase automatization level.
The working principle of the present embodiment is as follows:
Catalysis flue gas or boiler smoke enter high energy venturi-type eductors 20, with circulation alkali liquor in high energy text mound injector
It is vigorously mixed in 2, liquid moment is broken into micron order fine droplet, increases SO2、SO3The absorption efficiency of equal sour gas.Then
Gas-liquid mixed tangent line enters desulfurizing tower 2, and under the influence of centrifugal force, gas-liquid separation redistributes gas by gas distributing disc 22
Body flow direction, is discharged after removing the drop carried secretly in flue gas using demister 6.
Washed 12 boost cycle of circulating pump of the doctor solution of 2 tower reactor of desulfurizing tower returns high energy venturi-type eductors 20 as absorption
The doctor solution of liquid, 2 tower reactor of desulfurizing tower boosts to oxidation jet nozzle 14 through oxidation cycle pump 13, aoxidizes jet nozzle 14 due to it
Unique internal structure can aspirate the air in atmosphere, and can be bubble breaking at minimum microbubble, from oxidation jet stream
The circulation fluid that nozzle 14 comes out enters tower reactor side wall gas-liquid import 10, then in 2 liquid level of desulfurizing tower sodium sulfite accomplished below
Oxidation.Technique water conveying system 16 is according to 2 liquid level amount of makeup water of desulfurizing tower, and sodium carbonate compounding system 17 is according in 2 tower of desulfurizing tower
PH supplements lye amount.Subsequent processing workshop section is drained into outside the COD brackish water up to standard containing suspended matter or particulate matter to continue with.
For removing 500kg sulfur dioxide per hour, two kinds of technical solutions of the invention and common process consume alkali cost
Comparison is as shown in table 1.
| Serial number | Absorbent type | 50% lye | 98%Na2CO3Solid |
| 1 | SO2Total removing amount (kg/h) | 500 | 500 |
| 2 | Alkaline absorbent molecular weight | 40 | 106 |
| 3 | Alkaline absorbent dosage (t/h) | 1.25 | 0.85 |
| 4 | Absorbent purchase price (member/t) | 1800 | 1500 |
| 5 | Absorbent day-rate cost (Wan Yuan) | 5.4 | 3.04 |
| 6 | Absorbent year cost (Wan Yuan) | 1971 | 1110 |
| 7 | Generate Na2SO4Molecular weight | 142 | 142 |
| 8 | Generate Na2SO4Yield (t/h) | 1.11 | 1.11 |
As seen from the above table, the present invention is using soda ash as desulfurizing agent, and compared with sodium method, generation salt content total amount is the same, but
It is that can reduce cost 43.7% in alkaline consumption cost 1 year.Therefore the present invention has great promotional value.
Claims (10)
1. a kind of Method of Soda flue gas desulfurization device, which is characterized in that including being used for SO2Be dissolved in liquid phase water pretreatment system,
Desulfurizing tower (2), technique water conveying system (16), the sodium carbonate compounding system (17) for providing lye and be used for oxidative
The oxidation cycle system of sodium, desulfurizing tower (2) top are equipped with chimney (23), are equipped with demister (6) below chimney, desulfurizing tower (2) point
It is not connect with technique water conveying system (16) and sodium carbonate compounding system (17), desulfurizing tower (2) tower reactor position is equipped with tower reactor side wall
Gas-liquid import (10), desulfurizing tower (2) bottom be equipped with cleaning solution outlet (11), cleaning solution export (11) by oxidation cycle system with
Tower reactor side wall gas-liquid import (10) connection；The pretreatment system is venturi pretreatment system or hollow-spraying-tower pretreatment system
System.
2. Method of Soda flue gas desulfurization device as described in claim 1, which is characterized in that the hollow-spraying-tower pretreatment system packet
It includes and is located at the external chilling circulating pump (15) of desulfurizing tower (2), the chilling nozzle (3) being located in desulfurizing tower (2), is located at desulfurizing tower
(2) gas inlet in tower wall (1)；The gas inlet (1) is located at desulfurizing tower (2) bottoms level or more, chilling nozzle (3) position
Above gas inlet (1), the import connection cleaning solution outlet (11) of chilling circulating pump (15), the outlet of chilling circulating pump (15)
It connects chilling nozzle (3)；The exit of the chilling circulating pump (15) is equipped with the discharge outlet (19) for discharging brackish water.
3. Method of Soda flue gas desulfurization device as claimed in claim 2, which is characterized in that the desulfurizing tower (2) further includes being set to
Collecting tank (4) in desulfurizing tower (2) and spray spout (5) are located at the first alkali liquor inlet (18) on desulfurizing tower (2) side wall, the
Two alkali liquor inlets (8), fresh water inlet (9) are located at the external cleaning circulation pump (12) of desulfurizing tower (2)；Collecting tank (4) is located at anxious
Between cold nozzle (3) and demister (6), the second alkali liquor inlet (8), fresh water inlet (9) and spray spout (5) are respectively positioned on liquid collecting
Between slot (4) and demister (6), the first alkali liquor inlet (18) is located at below smoke inlet (1), sodium carbonate compounding system (17) point
Not Tong Guo the first alkali liquor inlet (18) and the second alkali liquor inlet (8) connect with desulfurizing tower (2), technique water conveying system (16) passes through
Fresh water inlet (9) is connect with desulfurizing tower (2), and the import of cleaning circulation pump (12) is connect with the outlet at bottom of collecting tank (4), is washed
The outlet for washing circulating pump (12) is connect with spray spout (5)；Liquid level is equipped between desulfurizing tower (2) tower reactor and collecting tank (4) to be connected to
It manages (7).
4. the Method of Soda flue gas desulfurization device as claimed in claim 3, which is characterized in that the spray spout (5) uses 4
The two-way atomizer of~7 rows is closed centered on two-way atomizer, two-way injection, 140~145 ° of jet angle of vortex silicon carbide
Nozzle.
5. Method of Soda flue gas desulfurization device as described in claim 1, which is characterized in that the venturi pretreatment system includes
Be located at desulfurizing tower (2) external venturi-type eductors (20) and cleaning circulation pump (12), be located at gas-liquid inside desulfurizing tower (2) into
Mouth (21)；The gas-liquid import (21) is located at desulfurizing tower (2) bottoms level or more, and cleaning solution exports (11) and cleaning circulation pump
(12) entrance connection, the outlet (12) of cleaning circulation pump are connect with the liquid phase entrance of venturi-type eductors (20), venturi spray
The outlet of emitter (20) is connect with gas-liquid import (21), and venturi-type eductors are equipped with gas inlet (1)；The gas-liquid import
(21) tangential feed mode is used；The exit of the cleaning circulation pump (12) is equipped with the discharge outlet for discharging brackish water
(19)。
6. the Method of Soda flue gas desulfurization device as claimed in claim 5, which is characterized in that the desulfurizing tower (2) further includes
For redistributing the gas distributing disc (22) of gas flow, liquid is equipped between desulfurizing tower (2) tower reactor and gas distributing disc (22)
Position communicating pipe (7).
7. the Method of Soda flue gas desulfurization device as described in claim 1, which is characterized in that the demister (6) is eddy flow
The composite structure of spiral demister or eddy flow spiral demister and wet electric precipitator, defogging effect require partial size at 30 μm or less.
8. the Method of Soda flue gas desulfurization device as described in claim 1, which is characterized in that the oxidation cycle system includes
Oxidation cycle pumps (13) and oxidation jet nozzle (14), and oxidation cycle pumps the import connection cleaning solution outlet (11) of (13), oxidation
The outlet of the import of outlet connection oxidation jet nozzle (14) of circulating pump (13), oxidation jet nozzle (14) connects tower reactor side wall
Gas-liquid import (10), oxidation jet nozzle (14) structure use venturi undergauge, expanding structure.
9. a kind of Method of Soda flue gas desulfurization technique, which is characterized in that utilize any one of the claim 1~8 Method of Soda flue gas
Desulfurizer carries out desulfurization, comprising the following steps:
Step 1: circulation fluid is broken by micron order drop by pretreatment system, flue gas by with micron order drop contact, will
SO in flue gas2It is dissolved in micron order drop, enters desulfurizing tower tower reactor after circulation fluid is cooling；
Step 2: being mixed, neutralized with the circulation fluid in desulfurizing tower tower reactor by the way that sodium carbonate compounding system is prepared soda ash solution
Reaction generates Na2SO3；
Step 3: the circulation fluid in desulfurizing tower tower reactor being aoxidized by oxidation cycle system, the oxidation in oxidation cycle system
Jet nozzle comes out at minimum microbubble from oxidation jet nozzle by the air in suction atmosphere, and by bubble breaking
Circulation fluid enters side wall gas-liquid import, then in thionizer liquid level Na accomplished below2SO3Oxidation.
Step 4: flue gas is by the way that, through smoke stack emission, outlet salt water passes through the outlet salt mouth of a river and is discharged after demister demisting.
10. Method of Soda flue gas desulfurization technique as claimed in claim 9, which is characterized in that sodium chloride in sodium carbonate in the step 2
The content of impurity is no more than 1wt%.
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