CN109954381A - A kind of environment protection desulphurization technique of zinc abstraction system - Google Patents
A kind of environment protection desulphurization technique of zinc abstraction system Download PDFInfo
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- CN109954381A CN109954381A CN201711425681.6A CN201711425681A CN109954381A CN 109954381 A CN109954381 A CN 109954381A CN 201711425681 A CN201711425681 A CN 201711425681A CN 109954381 A CN109954381 A CN 109954381A
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- 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
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- 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
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Abstract
The present invention relates to one kind to be used for zinc abstraction system flue gas desulfurization technique, including ZnO ore pulp manufactures part, first grade desulfurizing part, two-grade desulfurizing part, three-level disengagement section.ZnO ore pulp manufactures part: zinc dross after casting mold passes through ball milling, after isolating metallic zinc therein, dross powder through fluorine and chlorine removal technique until in zinc dross fluorine content no more than 0.1%, chlorinity be not more than 0.3%.Enter Vertical Mill process further levigate zinc oxide after the pulp of pulp pond again, forms ZnO ore pulp.First grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and reacts with the sulfur dioxide in the zinc abstraction system flue gas by washing；The zinc sulfite slurries formed after reaction are concentrated, supernatant is discharged into aeration oxidation pool, filtrate is discharged into aeration oxidation pool after filtering for underflow, the pulp pond that solution after aeration oxidation pool aoxidizes returns to ZnO ore pulp manufacture part recycles, and open circuit send zinc purification system to be further processed after zinc ion concentration reaches 150g/L in solution；Filter residue carries out the synthetical recovery of zinc after sending zinc sulfite feed bin and other material containing zinc collocation to handle.The technique is generated without harmful exhaust, waste residue, waste water.
Description
Technical field
The present invention relates to a kind of for the sulfur removal technology containing sulfur dioxide flue gas in zinc abstraction system, and the invention belongs to zinc smeltings
Refining system flue gas desulfurization technique field.
Background technique
Currently used sulfur method mainly has: lime method, sodalime double alkali method, Method of Soda, ammonia-soda process, magnesium oxide method and oxygen
Change zinc method, peroxide passivation etc., each method has the advantages that corresponding and deficiency.
Waste is generated during lime method, calcium and sodium double alkali method desulfurizing, there are secondary pollutions, and desulfuration efficiency is lower；It is pure
All there is the problems such as higher operating costs in alkaline process, ammonia-soda process, magnesium oxide method, peroxide passivation.
The advantages of zinc oxide method is that operating cost is low, does not generate waste, does not also generate secondary pollution, in recent years using compared with
Extensively, traditional Zinc oxide desulfuration technology is as follows: the slurries and contain dioxy that flue dust or pure ZnO and water containing zinc oxide are mixed
Change sulphur (SO2) smoke contacts, it reacts, generates zinc sulfite, zinc sulfite precipitates after filtering, and the filter residue of formation send roasting
Workshop.But there are many drawbacks for conventional oxidation zinc sulfur removal technology, firstly, in slurries sweetening process, the product sulfurous acid of generation
Zinc viscosity is bigger, and the zinc sulfite in circulation fluid is easy to deposit in equipment, pipeline, causes Incrustation of pipe to block, fouling
Very bad cleaning afterwards.Secondly, the sulfur dioxide in flue gas concentration that zinc abstraction system such as Rotary Kiln generates is higher, using simple
Zinc technology is aoxidized it is difficult to ensure that flue gas qualified discharge.
Application publication number is the patent of CN103908886A, CN103908884, CN103908887A, CN103908885A,
The viscosity of zinc oxide slurries is reduced by means such as addition medicaments to reduce line clogging problem, still, reduces zinc oxide slurries
Viscosity not solving the problems, such as line clogging, ZnSO in itself3Precipitating is continuously generated during the reaction.
In addition, application publication number is the domestic patent of CN103908886A, this method is by changing the spray of zinc oxide slurries
Firing angle degree blocks to solve the problems, such as that pipeline is easy, but likewise, also simply by the angulation change of physics, it is also difficult to it solves
Substantive issue.
Summary of the invention
In view of above-mentioned, the purpose of the present invention is disclose a kind of Zinc oxide desulfuration technology.Main purpose is to solve present skill
Line clogging in the presence of art and the problem of be unable to ensure high concentration qualified discharge containing sulfur dioxide flue gas.
The present invention relates to one kind to be used for zinc abstraction system flue gas desulfurization technique, including ZnO ore pulp manufacture part, first grade desulfurizing
Partially, two-grade desulfurizing part, three-level disengagement section.
(1) ZnO ore pulp manufactures part: the zinc dross after casting mold passes through ball milling, after isolating metallic zinc therein, dross powder
Through fluorine and chlorine removal technique until in zinc dross fluorine content no more than 0.1%, chlorinity be not more than 0.3%；It is laggard through the pulp of pulp pond again
Enter Vertical Mill process further levigate zinc oxide, forms ZnO ore pulp.
(2) first grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and the zinc abstraction system cigarette by washing
Sulfur dioxide reaction in gas.For the zinc sulfite slurries formed after reaction through filtering, filtrate contains a small amount of zinc sulfate, filtrate because in
Most of pulp pond for returning to ZnO ore pulp manufacture part recycles, and small part open circuit send zinc purification system to be further processed.Filter
Slag carries out the synthetical recovery of zinc after sending zinc sulfite feed bin and other material containing zinc collocation to handle.Flue gas after first order absorption into
Enter two-level absorption tower.
(3) two-grade desulfurizing part: remaining sulfur dioxide is reacted with the ZnO ore pulp of penetrating again in flue gas, after reaction
Slurries are concentrated, and the complete zinc oxide of a large amount of unreacteds is contained in supernatant, and supernatant returns to first grade absorption tower to be continued as absorbent
It is reacted with the sulfur dioxide in flue gas, underflow is separated by filtration rear filtrate and is discharged into aeration oxidation pool；Filter residue send zinc sulfite feed bin
With the synthetical recovery for carrying out zinc after other material containing zinc collocation processing.Flue gas after second level absorbs enters three-level absorption tower.
(4) three-level disengagement section: remaining sulfur dioxide reacts in three-level desulfurizing tower with desulfurization medicament A in flue gas, cigarette
Outlet after gas is up to standard, the solution after reaction, which enters circulatory pool, can return to the recycling of three-level desulfurizing tower.It is periodically discharged a part of molten
Liquid rinses desulfuration pipeline, prevents line clogging.
A kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the ZnO ore pulp
The raw material for manufacturing part is zinc dross, and the raw material ZnO content is high and does not contain harmful heavy metal component, and what is generated after alkali cleaning is useless
Water fluoridation chlorine is outer without other harmful heavy metal ingredients.
A kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the ZnO ore pulp
Manufacture part is related to zinc dross by ball milling (D90 70-80 μ), and levigate dross powder is through fluorine and chlorine removal technique until fluorine in zinc dross
Content is not more than 0.3% no more than 0.1%, chlorinity.Through treated dross powder into pulp pond, add water and aeration oxidation pool
The slurries of return carry out pulp, and the ZnO concentration after pulp reaches 10%-20%, and the ZnO after pulp enters Vertical Mill process and further grinds
Carefully, the ZnO pulp granularity prepared is D90 5-20 μ, and wherein zinc oxide content is greater than 90%, and impurity content is few, fine size, can
Ensure SO in ZnO ore pulp and flue gas2To SO in flue gas when reaction2Assimilation effect.
A kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the level-one is de-
The zinc sulfite slurries formed after reacting in sulphur part are concentrated, and supernatant is discharged into aeration oxidation pool, and filtrate is arranged after filtering for underflow
Enter aeration oxidation pool, the pulp pond that the solution after aeration oxidation pool aoxidizes returns to ZnO ore pulp manufacture part recycles, when molten
Open circuit send zinc purification system to be further processed after zinc ion concentration reaches 150g/L in liquid.Zinc sulfite slurries supernatant therein with
For the filtrate of underflow after filtering in the pulp Chi Qianjing Air Exposure for returning to ZnO ore pulp manufacture part, which can be by sulfurous acid
A possibility that zinc is oxidized to zinc sulfate, can greatly reduce line clogging.
A kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the three-level is de-
Desulfurization medicament A used in sulphur part is a kind of oxidant.
A kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the three-level is de-
A part of solution is periodically discharged in sulphur part and rinses desulfuration pipeline, prevents line clogging.Using molten during flushing pipe
The oxidation of remaining desulfurization medicament A, is oxidized to zinc sulfate for zinc sulfite in liquid, to prevent zinc sulfite Crystallization Plugging
Pipeline.
The present invention has the advantages that the removal efficiency of sulfur dioxide in flue gas can be effectively improved, effectively prevention and control cigarette
Pollution of the sulfur dioxide to atmosphere in gas.The advantages of invention be it is easy to operate, except sulfur dioxide it is high-efficient, pipeline is not easy to block up
Plug, reagent cost are low, and anti-sulfur dioxide impact load ability is strong, and the zinc sulfite of generation can integrate after further collocation processing
Zinc is recycled, zinc abstraction system is particularly suitable for.The technique is generated without harmful exhaust, waste residue, waste water, and therefore, this technique has good
Good environmental benefit.
The present invention has the advantages that the sulfur dioxide in exhaust gas can largely be converted after the process for passing through invention
Sulfuric acid can be prepared by subsequent processing for zinc sulfite, to realize recycling and reusing；Small part is converted into zinc sulfate, passes through zinc
System is further processed realization and recycles, and therefore, this technique also has certain economic benefit.
Specific embodiment
Example 1, the present invention relates to one kind to be used for zinc abstraction system flue gas desulfurization technique, including ZnO ore pulp manufacture part, one
Grade disengagement section, two-grade desulfurizing part, three-level disengagement section.
(1) ZnO ore pulp manufacturing department point includes: the sorted metal spelter of zinc dross after casting mold, after sieving metallic zinc granule, into
Goal grinder sequence, dross Powder Particle Size are 75 μ of D90, levigate dross powder after multiple hearth furnace is handled fluorine content 0.07% in zinc dross,
Chlorinity 0.2%, wherein zinc oxide content 95.5%.Through treated dross powder into pulp pond, water is added to carry out pulp, pulp
ZnO concentration afterwards reaches 12%, and Vertical Mill process further levigate zinc oxide is entered after the pulp of pulp pond, forms ZnO ore pulp grain
Degree is 15 μ of D90.
(2) first grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and the zinc abstraction system cigarette by washing
Sulfur dioxide reaction in gas.It is passed through the exhaust gas volumn 8000-120000Nm of flue gas3/ h, 100-250 DEG C of flue-gas temperature, in flue gas
SO2Concentration 4000-12000mg/Nm3, concentration supernatant is discharged into aerating oxidation after the zinc sulfite slurries formed after reaction are concentrated
Pond, filtrate is discharged into aeration oxidation pool after filtering for concentration underflow, and remaining zinc sulfite is oxidized in solution in aeration oxidation pool
At zinc sulfate, the pulp pond for then returning to ZnO ore pulp manufacture part is recycled；Filter residue all send zinc sulfite feed bin with it is other
The synthetical recovery of zinc is carried out after material containing zinc collocation processing.SO 2 from fume concentration after first order absorption is 500-800mg/
Nm3Into two-level absorption tower.
(3) two-grade desulfurizing part: remaining sulfur dioxide is reacted with the ZnO ore pulp of penetrating again in flue gas, after reaction
Slurries are concentrated, and the complete zinc oxide of a large amount of unreacteds is contained in supernatant, and supernatant returns to first grade absorption tower to be continued as absorbent
It is reacted with the sulfur dioxide in flue gas, underflow is separated by filtration rear filtrate and is discharged into aeration oxidation pool, and returning to step (2) circulation makes
With；Filter residue carries out the synthetical recovery of zinc after sending zinc sulfite feed bin and other material containing zinc collocation to handle.After second level absorbs
SO 2 from fume concentration is 100-160mg/Nm3.SO in the flue gas2Concentration has reached national emission standard, can be without three-level
Absorb direct qualified discharge.
Example 2.The present invention relates to one kind to be used for zinc abstraction system flue gas desulfurization technique, including ZnO ore pulp manufacture part, one
Grade disengagement section, two-grade desulfurizing part, three-level disengagement section.
(1) ZnO ore pulp manufacturing department point includes: the sorted metal spelter of zinc dross after casting mold, after sieving metallic zinc granule, into
Goal grinder sequence, dross Powder Particle Size are that fluorine contains the levigate dross powder of 70 μ of D90 in zinc dross after one or more snippets alkali cleaning processing
0.1%, chlorinity 0.3% are measured, wherein zinc oxide content 90.5%.Through treated dross powder into pulp pond, add water and aeration
The slurries that pond returns carry out pulp, and the ZnO concentration after pulp reaches 10%, then enter Vertical Mill process into one after the pulp of pulp pond
Levigate zinc oxide is walked, forming ZnO pulp granularity is 10 μ of D90.
(2) first grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and the zinc abstraction system cigarette by washing
Sulfur dioxide reaction in gas.It is passed through the exhaust gas volumn 100000-200000Nm of flue gas3/ h, 100-250 DEG C of flue-gas temperature, flue gas
Middle SO2Concentration 8000-15000mg/Nm3, concentration supernatant is discharged into aerating oxidation after the zinc sulfite slurries formed after reaction are concentrated
Pond, filtrate is discharged into aeration oxidation pool after filtering for concentration underflow, and remaining zinc sulfite is oxidized in solution in aeration oxidation pool
A possibility that pulp pond that ZnO ore pulp manufacture part is returned to after zinc sulfate recycles, reduction line clogging.Filter residue all send Asia
The synthetical recovery of zinc is carried out after zinc sulfate feed bin and other material containing zinc collocation processing.SO 2 from fume after first order absorption
Concentration is 1200-2250mg/Nm3Into two-level absorption tower；
(3) two-grade desulfurizing part: remaining sulfur dioxide is reacted with the ZnO ore pulp of penetrating again in flue gas, the slurries after reaction
It is concentrated, the complete zinc oxide of a large amount of unreacteds is contained in supernatant, supernatant returns to first grade absorption tower as absorbent continuation and cigarette
Sulfur dioxide reaction in gas, underflow are separated by filtration rear filtrate and are discharged into aeration oxidation pool.Filter residue send zinc sulfite feed bin and its
The synthetical recovery of zinc is carried out after its material containing zinc collocation processing.SO 2 from fume concentration after second level absorbs is 240-
450mg/Nm3Into three-level absorption tower；
(4) three-level disengagement section: remaining sulfur dioxide and concentration are 2% desulfurization medicament A anti-in three-level desulfurizing tower in flue gas
It answers, sulfur dioxide in flue gas concentration is 120-225mg/Nm after reaction3, remaining desulfurization medicament A concentration in the solution after reaction
It is 0.5%, the solution of 90% volume returns to three-level desulfurizing tower and is recycled, and in addition desulfurization is rinsed in the solution discharge of 10% volume
Pipeline.
Example 3, the present invention relates to one kind be used for zinc abstraction system flue gas desulfurization technique, including ZnO ore pulp manufacture part,
First grade desulfurizing part, two-grade desulfurizing part, three-level disengagement section.
(1) ZnO ore pulp manufacturing department point includes: the sorted metal spelter of zinc dross after casting mold, after sieving metallic zinc granule, into
Goal grinder sequence, dross Powder Particle Size are 70 μ of D90, wherein zinc oxide content 90.5%, and levigate dross powder is through one or more snippets alkali
Wash after processing fluorine content 0.05%, chlorinity 0.25% in zinc dross.Through treated dross powder into pulp pond, add water and exposure
The slurries that gas pond returns carry out pulp, and the ZnO concentration after pulp reaches 15%, then enter after the pulp of pulp pond Vertical Mill process into
One step is levigate zinc oxide, forming ZnO pulp granularity is 10 μ of D90.
(2) first grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and the zinc abstraction system cigarette by washing
Sulfur dioxide reaction in gas.It is passed through the exhaust gas volumn 150000-220000Nm of flue gas3/ h, 100-250 DEG C of flue-gas temperature, flue gas
Middle SO2Concentration 8000-15000mg/Nm3, concentration supernatant is discharged into aerating oxidation after the zinc sulfite slurries formed after reaction are concentrated
Pond, filtrate is discharged into aeration oxidation pool after filtering for concentration underflow, and remaining zinc sulfite is oxidized in solution in aeration oxidation pool
A possibility that pulp pond that ZnO ore pulp manufacture part is returned to after zinc sulfate recycles, reduction line clogging.Filter residue all send Asia
The synthetical recovery of zinc is carried out after zinc sulfate feed bin and other material containing zinc collocation processing.SO 2 from fume after first order absorption
Concentration is 1200-2500mg/Nm3Into two-level absorption tower；
(3) two-grade desulfurizing part: remaining sulfur dioxide is reacted with the ZnO ore pulp of penetrating again in flue gas, the slurries after reaction
It is concentrated, the complete zinc oxide of a large amount of unreacteds is contained in supernatant, supernatant returns to first grade absorption tower as absorbent continuation and cigarette
Sulfur dioxide reaction in gas, underflow is separated by filtration rear filtrate and is discharged into aeration oxidation pool, through solution zinc in detection aeration tank from
Sub- concentration reaches 150g/L, and by the part solution, all open circuit send zinc purification system to be further processed.Filter residue send zinc sulfite material
The synthetical recovery of zinc is carried out behind storehouse and other material containing zinc collocation processing.SO 2 from fume concentration after second level absorbs is
250-500mg/Nm3Into three-level absorption tower；
(4) three-level disengagement section: remaining sulfur dioxide and concentration are 2% desulfurization medicament A anti-in three-level desulfurizing tower in flue gas
It answers, sulfur dioxide in flue gas concentration is 150-355mg/Nm after reaction3, remaining desulfurization medicament A concentration in the solution after reaction
It is 0.5%, the solution of 90% volume returns to three-level desulfurizing tower and is recycled, and in addition desulfurization is rinsed in the solution discharge of 10% volume
Pipeline.
The invention mainly comprises ZnO ore pulps to manufacture part, first grade desulfurizing part, two-grade desulfurizing part, three-level disengagement section.
ZnO ore pulp manufactures part: the zinc dross after casting mold passes through ball milling, and after isolating metallic zinc therein, dross powder is through fluorine and chlorine removal work
Skill until in zinc dross fluorine content no more than 0.1%, chlorinity be not more than 0.3%.Enter Vertical Mill process after the pulp of pulp pond again
Further levigate zinc oxide, forms ZnO ore pulp.First grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and passes through
Sulfur dioxide reaction in the zinc abstraction system flue gas of washing；The zinc sulfite slurries formed after reaction are concentrated, and supernatant is discharged into
Aeration oxidation pool, filtrate is discharged into aeration oxidation pool after filtering for underflow, and the solution after aeration oxidation pool aoxidizes returns to ZnO ore pulp
The pulp pond of manufacture part recycles, and open circuit send zinc purification system further after zinc ion concentration reaches 150g/L in solution
Processing；Filter residue carries out the synthetical recovery of zinc after sending zinc sulfite feed bin and other material containing zinc collocation to handle.After first order absorption
Flue gas enter two-level absorption tower；Two-grade desulfurizing part: remaining sulfur dioxide is anti-with the ZnO ore pulp of penetrating again in flue gas
Answer, the slurries after reaction are concentrated, in supernatant contain the complete zinc oxide of a large amount of unreacteds, supernatant return first grade absorption tower as
Absorbent continuation is reacted with the sulfur dioxide in flue gas, and underflow is separated by filtration rear filtrate and is discharged into aeration oxidation pool；Filter residue send Asia
The synthetical recovery of zinc is carried out after zinc sulfate feed bin and other material containing zinc collocation processing.Flue gas after second level absorbs enters three-level
Absorption tower；Three-level disengagement section: remaining sulfur dioxide reacts in three-level desulfurizing tower with desulfurization medicament A in flue gas, and flue gas reaches
Outlet after mark, the solution after reaction, which enters circulatory pool, can return to the recycling of three-level desulfurizing tower.A part of solution punching is periodically discharged
Desulfuration pipeline is washed, line clogging is prevented.The present invention is suitable for the flue gas desulfurization of zinc abstraction system, can effectively improve dioxy in flue gas
Change the removal efficiency of sulphur, the effectively pollution of prevention and control sulfur dioxide in flue gas to atmosphere.The advantages of invention be it is easy to operate,
Except sulfur dioxide is high-efficient, nozzle, pipeline are not easy to plug, reagent cost is low, and anti-sulfur dioxide impact load ability is strong, generation
Zinc sulfite through further collocation processing after can synthetical recovery zinc, be particularly suitable for zinc abstraction system.The technique without harmful exhaust,
Waste residue, waste water generate.
Claims (6)
1. the present invention relates to one kind to be used for zinc abstraction system flue gas desulfurization technique, including ZnO ore pulp manufacture part, first grade desulfurizing portion
Divide, two-grade desulfurizing part, three-level disengagement section；
(1) ZnO ore pulp manufactures part: the zinc dross after casting mold passes through ball milling, and after isolating metallic zinc therein, dross powder is through removing
Fluorine chlorine technique until in zinc dross fluorine content no more than 0.1%, chlorinity be not more than 0.3%；
Enter Vertical Mill process further levigate zinc oxide after the pulp of pulp pond again, forms ZnO ore pulp；
(2) first grade desulfurizing part: the ZnO ore pulp prepared sprays into first grade absorption tower and the zinc abstraction system flue gas by washing
Sulfur dioxide reaction；The zinc sulfite slurries formed after reaction are concentrated, and supernatant is discharged into aeration oxidation pool, and underflow is after filtering
Filtrate is discharged into aeration oxidation pool, and the pulp pond that the solution after aeration oxidation pool aoxidizes returns to ZnO ore pulp manufacture part recycles benefit
With open circuit send zinc purification system to be further processed after zinc ion concentration reaches 150g/L in solution；Filter residue send zinc sulfite material
The synthetical recovery of zinc is carried out behind storehouse and other material containing zinc collocation processing；Flue gas after first order absorption enters two-level absorption tower；
(3) two-grade desulfurizing part: remaining sulfur dioxide is reacted with the ZnO ore pulp of penetrating again in flue gas, the slurries after reaction
It is concentrated, the complete zinc oxide of a large amount of unreacteds is contained in supernatant, supernatant returns to first grade absorption tower as absorbent continuation and cigarette
Sulfur dioxide reaction in gas, underflow are separated by filtration rear filtrate and are discharged into aeration oxidation pool；Filter residue send zinc sulfite feed bin and its
The synthetical recovery of zinc is carried out after its material containing zinc collocation processing；Flue gas after second level absorbs enters three-level absorption tower；
(4) three-level disengagement section: remaining sulfur dioxide reacts in three-level desulfurizing tower with desulfurization medicament A in flue gas, and flue gas reaches
Outlet after mark, the solution after reaction, which enters circulatory pool, can return to the recycling of three-level desulfurizing tower；A part of solution punching is periodically discharged
Desulfuration pipeline is washed, line clogging is prevented.
2. a kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the ZnO ore pulp system
The raw material for making part is zinc dross, and the raw material ZnO content is high and does not contain harmful heavy metal component, the waste water generated after alkali cleaning
Fluorine and chlorine removal is outer without other harmful heavy metal ingredients.
3. a kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the ZnO ore pulp system
Make part and be related to zinc dross by ball milling (D90 70-80 μ), levigate dross powder through fluorine and chlorine removal technique until in zinc dross fluorine contain
Amount is not more than 0.3% no more than 0.1%, chlorinity；Through treated dross powder into pulp pond, water and aeration oxidation pool is added to return
The slurries returned carry out pulp, and the ZnO concentration after pulp reaches 10%-20%, and the ZnO after pulp enters Vertical Mill process and further grinds
Carefully, the ZnO pulp granularity prepared is D90 5-20 μ, and wherein zinc oxide content is greater than 90%, and impurity content is few, it can be ensured that ZnO
SO in ore pulp and flue gas2To SO in flue gas when reaction2Assimilation effect.
4. a kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the first grade desulfurizing
The zinc sulfite slurries formed after reacting in part are concentrated, and supernatant is discharged into aeration oxidation pool, and filtrate is discharged into after filtering for underflow
Aeration oxidation pool, the pulp pond that the solution after aeration oxidation pool aoxidizes returns to ZnO ore pulp manufacture part recycle, and work as solution
Open circuit send zinc purification system to be further processed after middle zinc ion concentration reaches 150g/L；Zinc sulfite slurries supernatant therein and bottom
Filtered filtrate is flowed through in the pulp Chi Qianjing Air Exposure for returning to ZnO ore pulp manufacture part, which can be by zinc sulfite
A possibility that being oxidized to zinc sulfate, line clogging can be greatly reduced.
5. a kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the three-level desulfurization
Desulfurization medicament A used in part is a kind of oxidant.
6. a kind of environment protection desulphurization technique of zinc abstraction system as described in claim 1, it is characterised in that the three-level desulfurization
A part of solution is periodically discharged in part and rinses desulfuration pipeline, prevents line clogging；Solution is utilized during flushing pipe
In remaining desulfurization medicament A oxidation, zinc sulfite is oxidized to zinc sulfate, to prevent zinc sulfite Crystallization Plugging pipe
Road.
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| CN201711425681.6A CN109954381A (en) | 2017-12-25 | 2017-12-25 | A kind of environment protection desulphurization technique of zinc abstraction system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122724A (en) * | 2021-03-31 | 2021-07-16 | 衢州华友钴新材料有限公司 | Treatment process for recycling waste residues generated in nickel-cobalt hydrometallurgy |
-
2017
- 2017-12-25 CN CN201711425681.6A patent/CN109954381A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122724A (en) * | 2021-03-31 | 2021-07-16 | 衢州华友钴新材料有限公司 | Treatment process for recycling waste residues generated in nickel-cobalt hydrometallurgy |
| CN113122724B (en) * | 2021-03-31 | 2023-01-13 | 衢州华友钴新材料有限公司 | Treatment process for recycling waste residues generated in nickel-cobalt hydrometallurgy |
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Application publication date: 20190702 |