CN107837651A - Acid hydrolysis tail gas processing method in a kind of sulfuric acid method titanium pigment production - Google Patents
Acid hydrolysis tail gas processing method in a kind of sulfuric acid method titanium pigment production Download PDFInfo
- Publication number
- CN107837651A CN107837651A CN201711336647.1A CN201711336647A CN107837651A CN 107837651 A CN107837651 A CN 107837651A CN 201711336647 A CN201711336647 A CN 201711336647A CN 107837651 A CN107837651 A CN 107837651A
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- Prior art keywords
- tail gas
- acid hydrolysis
- sulfuric acid
- hydrolysis tail
- titanium pigment
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
- B01D53/14—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 by absorption
- B01D53/1406—Multiple stage absorption
-
- 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
- B01D53/14—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 by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- 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
Abstract
Acid hydrolysis tail gas processing method in being produced the invention discloses a kind of sulfuric acid method titanium pigment, this method comprise the following steps：1）Acid hydrolysis tail gas is once sprayed using neutral sand leaching water, absorbs most of sulfur dioxide and dust in acid hydrolysis tail gas, and it is cooled；It is used to acidolysis after shower water press filtration leach；2）By step 1）An obtained spraying cooling tail gas uses H2O2Absorbing liquid carries out double absorption, tail gas is reached discharge standard；H2O2It is used for the preparation of sulfuric acid after absorbing liquid saturation after press filtration is handled.The present invention is by using neutral sand leaching water and H2O2Solution spraying, which is combined, to be handled acid hydrolysis tail gas, and acid hydrolysis tail gas can be made to reach discharge standard, will not also be produced new pollution sources, and each spray liquid reusable edible, be realized across technique clean manufacturing.
Description
Technical field
The invention belongs to field of titanium dioxide production, and in particular to acid hydrolysis tail gas processing side in a kind of sulfuric acid method titanium pigment production
Method.
Background technology
Titanium dioxide is with its nontoxic, optimal opacity, optimal whiteness and brightness, and good covering power, coloring
Power is widely used in many fields, such as coating, ink, plastics, rubber, paper, ceramics and synthetic fibers industry.At present, I
The titanium dioxide of state mainly uses Production By Sulfuric Acid Process technique.
Hydrolysis procedure be sulfuric acid method titanium pigment production technology must be through process, at present mainly by interval acidolysis process and continuous
Acidolysis process, no matter any acidolysis process, acid hydrolysis tail gas can be produced, because containing the pollution such as sulfur dioxide, dust in tail gas
Thing, so tail gas directly discharge does not both meet discharging standards, environment can be polluted again.In view of acid hydrolysis tail gas temperature
Height, in general processing mode are cooled using Water spray, and the method for then taking alkaline aqueous solution to absorb is handled, but is adopted
Absorbed with alkaline water and deposit weakness both ways, hydrogen sulfide effect is relatively poor, and another aspect alkaline water is inhaled first, alkaline water absorbs
Caused sulfate liquor can discharge after also needing to individually processing after receipts, and at present to the processing cost of sulfate solution
It is higher, it is clear that to be uneconomic.
Patent document " tail during acidolysis main reaction in a kind of production of sulfuric acid method titanium pigment of Application No. 200610019227.6
Mention by acid hydrolysis tail gas after Venturi scrubbing in the method for gas disposal ", then sprayed by spray water tower, by making gas
Body is circulated in Venturi tube, extends the active area of gas, and the mesh of sulfur content and exhaust temperature in tail gas is reduced so as to reach
, but in actual production, because containing substantial amounts of dust in tail gas, while have sulphur generation, the structure for being confined to venturi lacks
Fall into, the situation that venturi blocks often occurs, has a strong impact on vent gas treatment effect.
Application No. CN201220430574.9 patent document is " at a kind of sulfuric acid method titanium pigment production acidolysis reaction tail gas
Reason device " is the mode being used in conjunction using venturi and spray absorber, and venturi uses alkaline Water spray, and during spray column uses
Property Water spray combination carry out acid hydrolysis tail gas processing, the method equally exists venturi blockage problem, while using alkalescence
Water spray can produce sulfate liquor, it is necessary to handle again, generate new pollution sources.
Periodical and document in the production on sulfuric acid method titanium pigment domestic at present on acid hydrolysis tail gas processing is more, mainly makes
Method has one-level Water spray, one-level alkalescence Water spray, one-level Water spray to add one-level alkalescence Water spray and Water spray Jia Wenqiu
In absorb the technique processing method of integrated application, the defects of certain be present in these handling process, be on the one hand spraying effect not
It is good, on the other hand it is that can produce new sodium sulfate wastewater after spraying and handle the gypsum tailings of waste water, thus new dirt is generated again
Dye source, do not possess the optimization of environment-protecting clean production.Therefore, a kind of green of offer is needed badly to clean, at the acid hydrolysis tail gas that cost is low
Reason method.
The content of the invention
For deficiencies of the prior art, acid in being produced it is an object of the invention to provide a kind of sulfuric acid method titanium pigment
Solve exhaust gas treating method.By using neutral sand leaching water and H2O2Solution combines carries out spray process to acid hydrolysis tail gas, can make
Acid hydrolysis tail gas reaches discharge standard, will not also produce new pollution sources, and spray liquid reusable edible.
Acid hydrolysis tail gas processing method in being produced the invention provides a kind of sulfuric acid method titanium pigment, this method include following step
Suddenly：
1）Acid hydrolysis tail gas is once sprayed using neutral sand leaching water, absorbs most of sulfur dioxide and powder in acid hydrolysis tail gas
Dirt, and it is cooled；It is used to acidolysis after shower water press filtration leach；
2）By step 1）An obtained spraying cooling tail gas uses H2O2Absorbing liquid carries out double absorption, tail gas is reached discharge
Standard；H2O2It is used for the preparation of sulfuric acid after absorbing liquid saturation after press filtration is handled.
A shower water in the present invention refers to the sand leaching water after spray.
According to the present invention, the pH value of the neutral sand leaching water can be 6.5-7.
In the present invention, the temperature of the neutral sand leaching water can be less than 45 DEG C, preferably 30-45 DEG C.
According to the present invention, the flow of the neutral sand leaching water can be 600-1500m3/h.Under preferable case, the neutral sand
The flow of drainage is 1000-1500m3/h.
Under preferable case, the H2O2The mass concentration of absorbing liquid is 3%-15%.
Preferably, the double absorption is carried out by the way of spray.
According to the present invention, the H2O2The temperature of absorbing liquid can be less than 45 DEG C, preferably 35-45 DEG C.
In the present invention, the H2O2The flow of absorbing liquid can be 150-800m3/h.Preferably, the H2O2The stream of absorbing liquid
Measure as 350-800m3/h.
Compared with prior art, beneficial point of the invention is：
1st, processing method of the invention is by using neutral sand leaching water and H2O2Absorbing liquid is combined, and carries out spray-absorption successively,
Can be by acid hydrolysis tail gas processing to environmental protection standard is met, it does not use alkaline processing liquid, will not produce after needs are individually handled
The sulfate liquor that can be discharged, saves processing cost.
2nd, in the present invention, acidolysis leaching is supplied after press filtration pre-processes by the shower water once sprayed and is used, by inhaling
Receipts reach the double absorption liquid that replacing requires and used through press filtration treatment and supplied acid production with sulphur workshop as absorbing liquid, make once to spray
Water drenching and double absorption liquid recycle, and realize the comprehensive utilization of water resource and Sulphur ressource, and will not produce new pollution sources,
Without carrying out secondary pollution processing, cost for wastewater treatment is saved, realizes across technique clean manufacturing and comprehensive utilization of resources, had
There are higher environmental protection effect and economic benefit.
3rd, the present invention absorbs the qualified discharge that tail gas can be achieved by absorbing liquid twice, and processing step is simple, simplifies
Technique, reduce equipment investment.
Embodiment
Technical scheme is clearly and completely described below in conjunction with the embodiment of the present invention, it is clear that retouched
The embodiment stated is only part of the embodiment of the present invention, rather than whole embodiments.
Embodiment 1
The present embodiment is used to illustrate acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production of the invention.
Specifically include following steps：During acidolysis main reaction, it is 6.5 to use pH, temperature is 35 DEG C neutral sand leaching water with
600m3/h flow is once sprayed to acid hydrolysis tail gas, and the tail gas after spray is again 45 DEG C through excess temperature, mass concentration 3%
H2O2Absorbing liquid carries out secondary spraying absorption with 150m3/h flow, and a shower water directly feeds acidolysis leaching after press filtration
Take, H2O2Absorbing liquid uses through press filtration treatment and supplied acid production with sulphur workshop after saturation, in the tail gas after spraying twice
SO2Concentration is 38mg/m3, and exhaust temperature is 50 DEG C, meets environmental emission standard.
Embodiment 2
The present embodiment is used to illustrate acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production of the invention.
Specifically include following steps：During acidolysis main reaction, the neutral sand leaching water that it is 7 to use pH, temperature is 32 DEG C is with 1500m
3/h flow is once sprayed to acid hydrolysis tail gas, and the tail gas after spray is again 35 DEG C through excess temperature, mass concentration is 15%
H2O2Absorbing liquid carries out secondary spraying absorption with 800m3/h flow, and a shower water directly feeds acidolysis leaching after press filtration
Take, H2O2Absorbing liquid uses through press filtration treatment and supplied acid production with sulphur workshop after saturation, in the tail gas after spraying twice
SO2Concentration is 22mg/m3, and exhaust temperature is 44 DEG C, meets environmental emission standard.
Embodiment 3
The present embodiment is used to illustrate acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production of the invention.
Specifically include following steps：During acidolysis main reaction, it is 6.5 to use pH, temperature is 40 DEG C neutral sand leaching water with
1000m3/h flow is once sprayed to acid hydrolysis tail gas, and the tail gas after spray is again 40 DEG C through excess temperature, mass concentration is
10% H2O2Absorbing liquid carries out secondary spraying absorption with 400m3/h flow, and one time shower water directly feeds acid after press filtration
Solution leaching, H2O2Absorbing liquid uses through press filtration treatment and supplied acid production with sulphur workshop after saturation, the tail gas after spraying twice
Middle SO2Concentration is 23mg/m3, and exhaust temperature is 47 DEG C, meets environmental emission standard.
Embodiment 4
The present embodiment is used to illustrate acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production of the invention.
Specifically include following steps：During acidolysis main reaction, it is 6.5 to use pH, temperature is 30 DEG C neutral sand leaching water with
1000m3/h flow is once sprayed to acid hydrolysis tail gas, and the tail gas after spray is again 45 DEG C through excess temperature, mass concentration is
10% H2O2Absorbing liquid carries out secondary spraying absorption with 400m3/h flow, and one time shower water directly feeds acid after press filtration
Solution leaching, H2O2Absorbing liquid uses through press filtration treatment and supplied acid production with sulphur workshop after saturation, the tail gas after spraying twice
Middle SO2Concentration is 23mg/m3, and exhaust temperature is 47 DEG C, meets environmental emission standard.
Using the method for the present invention, by acid hydrolysis tail gas by pH be 6.5-7, temperature be less than 45 DEG C, flow 600-1500m
After 3/h neutral sand filtration Water spray, then by mass concentration be 3-15%, temperature less than 45 DEG C, flow be 150-800m3/h's
H2O2After solution spraying, make the SO in tail gas2Content is less than 50mg/m3, and temperature is less than 50 DEG C, and apparent condition is sparse, realizes
The environment protection emission of acid hydrolysis tail gas.Meanwhile because once spraying Water Sproading supply acidolysis leaching, double absorption liquid recovery supply sulphur system
Sour workshop, realizes the recycling of waste water, does not produce the pollution sources such as new waste water.It can be seen that the acid hydrolysis tail gas by the present invention
Processing method, acid hydrolysis tail gas is set to have reached environment protection emission；The recovery for the treatment of fluid uses, and realizes recycling for resource, does not produce
Raw new pollution sources, it is not necessary to put into new cost for wastewater treatment, both realized green clean manufacturing, save again it is economical into
This.
It is described above embodiments of the invention, described above is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.In the case of the scope and spirit without departing from illustrated embodiment, for the art
Many modifications and changes will be apparent from for those of ordinary skill.
Claims (8)
1. acid hydrolysis tail gas processing method in a kind of sulfuric acid method titanium pigment production, it is characterised in that this method comprises the following steps：
1）Acid hydrolysis tail gas is once sprayed using neutral sand leaching water, absorbs most of sulfur dioxide and powder in acid hydrolysis tail gas
Dirt, and it is cooled；It is used to acidolysis after shower water press filtration leach；
2）By step 1）An obtained spraying cooling tail gas uses H2O2Absorbing liquid carries out double absorption, tail gas is reached discharge
Standard；H2O2It is used for the preparation of sulfuric acid after absorbing liquid saturation after press filtration is handled.
2. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：In described
The pH value of property sand leaching water is 6.5-7.
3. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：In described
Property sand leaching water temperature be less than 45 DEG C.
4. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：In described
The flow of property sand leaching water is 600-1500m3/h.
5. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：It is described
H2O2The mass concentration of absorbing liquid is 3%-15%.
6. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：Described two
Secondary absorb is carried out by the way of spray.
7. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：It is described
H2O2The temperature of absorbing liquid is less than 45 DEG C.
8. acid hydrolysis tail gas processing method in sulfuric acid method titanium pigment production according to claim 1, it is characterised in that：It is described
H2O2The flow of absorbing liquid is 150-800m3/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711336647.1A CN107837651A (en) | 2017-12-14 | 2017-12-14 | Acid hydrolysis tail gas processing method in a kind of sulfuric acid method titanium pigment production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711336647.1A CN107837651A (en) | 2017-12-14 | 2017-12-14 | Acid hydrolysis tail gas processing method in a kind of sulfuric acid method titanium pigment production |
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| CN107837651A true CN107837651A (en) | 2018-03-27 |
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| CN201711336647.1A Pending CN107837651A (en) | 2017-12-14 | 2017-12-14 | Acid hydrolysis tail gas processing method in a kind of sulfuric acid method titanium pigment production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621669A (en) * | 2018-12-14 | 2019-04-16 | 四川龙蟒钛业股份有限公司 | A kind of method of promotor auxiliary sulfuric acid titanium white calcining tail gas desulfurization denitration |
| CN109621670A (en) * | 2018-12-14 | 2019-04-16 | 四川龙蟒钛业股份有限公司 | A kind of method of promotor aid in treatment sulfuric acid titanium white calcining tail gas |
Citations (1)
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| CN106606924A (en) * | 2015-10-22 | 2017-05-03 | 江苏澄天环保科技有限公司 | Desulphurization method and apparatus for sulfur-containing tail gas from rotary volatilizing kiln |
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2017
- 2017-12-14 CN CN201711336647.1A patent/CN107837651A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106606924A (en) * | 2015-10-22 | 2017-05-03 | 江苏澄天环保科技有限公司 | Desulphurization method and apparatus for sulfur-containing tail gas from rotary volatilizing kiln |
Non-Patent Citations (2)
| Title |
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| 唐振宁 编: "《钛白粉的生产与环境治理》", 31 May 2000, 化学工业出版社 * |
| 鲍建国 等 编著: "《清洁生产实用教程》", 31 August 2014, 中国环境出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621669A (en) * | 2018-12-14 | 2019-04-16 | 四川龙蟒钛业股份有限公司 | A kind of method of promotor auxiliary sulfuric acid titanium white calcining tail gas desulfurization denitration |
| CN109621670A (en) * | 2018-12-14 | 2019-04-16 | 四川龙蟒钛业股份有限公司 | A kind of method of promotor aid in treatment sulfuric acid titanium white calcining tail gas |
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Application publication date: 20180327 |
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