CN103432867A - Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production - Google Patents
Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production Download PDFInfo
- Publication number
- CN103432867A CN103432867A CN2013103865278A CN201310386527A CN103432867A CN 103432867 A CN103432867 A CN 103432867A CN 2013103865278 A CN2013103865278 A CN 2013103865278A CN 201310386527 A CN201310386527 A CN 201310386527A CN 103432867 A CN103432867 A CN 103432867A
- Authority
- CN
- China
- Prior art keywords
- tail gas
- chlorination
- hydrochloric acid
- produced
- waste
- Prior art date
- 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.)
- Pending
Links
Abstract
The invention discloses a method for comprehensively utilizing waste hydrochloric acid produced in a chlorination eluting tail gas process in chlorination method titanium white production, which comprises the following steps: directly passing acidic tail gas produced in a chlorination method production process through a water washing tower, passing the tail gas subjected to water washing through an alkali washing tower, and then performing up-to-standard discharge; filtering the acidic waste water produced in the water washing process, and precipitating the insoluble substance for recycling; adding an alkaline substance into the filtered solution, regulating the pH value, ensuring that the substance in the solution is hydrolyzed to generate an insoluble substance, then filtering the solution, and recycling the filter residue; performing evaporating concentration on the filtrate to obtain a byproduct chloride; and condensing vapor produced in the evaporation process to obtain high-purity hydrochloric acid. Through treatment and recycling of tail gas eluting wastewater, the discharge amount of the wastewater is reduced, the environmental pollution is decreased, and a large amount of byproducts can be recovered, thus improving the resource utilization efficiency.
Description
Technical field
The present invention relates to wastewater treatment and raw materials recovery in the Titanium Dioxide Produced by Chloride Procedure production process and utilize method, be specifically related to the method for comprehensive utilization of chlorination drip washing tail gas waste hydrochloric acid that process produces in a kind of Titanium Dioxide Produced by Chloride Procedure production.
Background technology
Chlorination in the Titanium Dioxide Produced by Chloride Procedure production process, process for refining process produce and contain CO
2, HCl, TiCl
4, SiCl
4, the waste gas such as chlorine, this waste gas adopts washing and alkali cleaning, the sour gas in can scrubbing exhaust gas generates waste hydrochloric acid, processes the chlorine in tail gas by alkali cleaning again, but due to the exhaust gas component complexity, SiCl in waste gas
4, TiCl
4hydrolysis generates insoluble matter silica and titanium dioxide, cause the waste hydrochloric acid generated can not directly use or sell because impurity content is high outward, general processing mode is that waste hydrochloric acid is directly entered to sewage disposal system, by in and after aeration, precipitation, filtration, be used as industry water, return for chlorination residues slurrying.Although the method is guaranteed waste water, waste gas non-pollution discharge, has reduced the pollution to environment, the acid waste water N-process has strengthened the supporting disposal ability of follow-up Sewage Disposal, has reduced the utilization ratio of resource simultaneously, has caused the significant wastage of resource.
Summary of the invention
The objective of the invention is to purify and reclaim the waste hydrochloric acid in Titanium Dioxide Produced by Chloride Procedure production process chlorinated exhaust wastewater eluting, and recycle solid matter wherein.By the hydrolysis of impurity in tail gas, remove the impurity in waste hydrochloric acid, insoluble matter recycles as the raw material of Titanium Dioxide Produced by Chloride Procedure; Reclaim the raw material of hydrochloric acid as other operations, improve the utilization ratio of resource, reduce production costs, obtain the byproduct chloride simultaneously.
The technical solution used in the present invention is:
In this Titanium Dioxide Produced by Chloride Procedure production, the method for comprehensive utilization of chlorination drip washing tail gas waste hydrochloric acid that process produces, comprise the following steps:
(1) the tail gas produced in the Titanium Dioxide Produced by Chloride Procedure production process is directly passed into to water scrubber, obtain acid waste water, the tail gas after washing passes into caustic wash tower again, and then tail gas directly discharges;
(2) to acid waste water
filter, waste residue is recycled after collecting, and obtains first-time filtrate and a filter residue;
(3) add alkaline solution in first-time filtrate, carry out ageing, the water impurity in acid waste water is parsed;
(4) carry out secondary filter, obtain secondary filtrate and secondary filter residue, return to chlorination furnace with a filter residue as raw materials for production after the squeezing of secondary filter residue and recycle;
(5) secondary filtrate is carried out to evaporation and concentration, obtain the byproduct chloride, the gas that evaporation process produces, by condensation, obtains highly purified hydrochloric acid, can be used as coating and processes the raw material of regulating acidity.
Described step (1) middle tail gas is to comprise HCl, TiCl
4, SiCl
4with chlorine etc., the acid waste gas of hydrolysis can occur.
Described step is the middle pH value of using alkaline solution to regulate filtrate (3), at pH, is 2～2.5, and temperature is under 343K～373K condition, ageing 30～70min.
After the invention process, reduce the load of tail gas alkaline cleaning process, guaranteed the vent gas treatment qualified discharge; The waste residue that processing procedure produces can directly return to chlorination furnace as high titanium slag, realizes the recycling of raw material; The acid waste water produced has reduced the pressure of discharge by reclaiming hydrochloric acid, can be used as the raw material of post processing simultaneously, has reduced production cost; Can obtain the byproduct chloride simultaneously.
The specific embodiment
Embodiment 1
Will
titanium Dioxide Produced by Chloride Procedurethe tail gas produced in production process directly passes into water scrubber, mainly contains CO in tail gas
2, HCl, TiCl
4, SiCl
4, chlorine etc., high temperature TiCl in water scrubber
4, SiCl
4meet water generation hydrolysis, generate HCl gas, in tail gas, original HCl gas is absorbed by water together with the HCl gas that is hydrolyzed generation, the waste hydrochloric acid that generation concentration is 25% left and right, and TiCl
4, SiCl
4the TiO that hydrolysis generates
2, SiO
2be deposited in waste hydrochloric acid simultaneously; The CO do not absorbed by water
2, chlorine etc. passes into and reacts in caustic wash tower and processed, then by smoke stack emission.Filter for the first time waste hydrochloric acid, obtain first-time filtrate and a filter residue; The pH value that adds limewash to regulate waste hydrochloric acid to first-time filtrate is 2.0, in temperature, is ageing 60min under the 353K condition, carries out secondary filter, secondary filter residue and once filter filter residue and return to chlorination furnace and recycle; Concentrated secondary filtrate obtains the calcium chloride crystal, and the HCl volatilized in concentration process, water vapour, through condensation, obtain highly purified hydrochloric acid, processes the raw material of regulating the pH value as coating.
Embodiment 2
Will
titanium Dioxide Produced by Chloride Procedurethe tail gas produced in production process directly passes into water scrubber, mainly contains CO in tail gas
2, HCl, TiCl
4, SiCl
4, chlorine etc., high temperature TiCl in water scrubber
4, SiCl
4meet water generation hydrolysis, generate HCl gas, in tail gas, original HCl gas is absorbed by water together with the HCl gas that is hydrolyzed generation, the waste hydrochloric acid that generation concentration is 25% left and right, and TiCl
4, SiCl
4the TiO that hydrolysis generates
2, SiO
2be deposited in waste hydrochloric acid simultaneously; The CO do not absorbed by water
2, chlorine etc. passes into and reacts in caustic wash tower and processed, then by smoke stack emission.Filter for the first time waste hydrochloric acid, obtain first-time filtrate and a filter residue; The pH value that adds limewash to regulate waste hydrochloric acid to first-time filtrate is 2.5, in temperature, is ageing 70min under the 373K condition, carries out secondary filter, secondary filter residue and once filter filter residue and return to chlorination furnace and recycle; Concentrated secondary filtrate obtains the calcium chloride crystal, and the HCl volatilized in concentration process, water vapour, through condensation, obtain highly purified hydrochloric acid, processes the raw material of regulating the pH value as coating.
Embodiment 3
The tail gas produced in the Titanium Dioxide Produced by Chloride Procedure production process is directly passed into to water scrubber, mainly contain CO in tail gas
2, HCl, TiCl
4, SiCl
4, chlorine etc., high temperature TiCl in water scrubber
4, SiCl
4meet water generation hydrolysis, generate HCl gas, in tail gas, original HCl gas is absorbed by water together with the HCl gas that is hydrolyzed generation, the waste hydrochloric acid that generation concentration is 25% left and right, and TiCl
4, SiCl
4the TiO that hydrolysis generates
2, SiO
2be deposited in waste hydrochloric acid simultaneously; The CO do not absorbed by water
2, chlorine etc. passes into and reacts in caustic wash tower and processed, then by smoke stack emission.Filter for the first time waste hydrochloric acid, obtain first-time filtrate and a filter residue; The pH value that adds limewash to regulate waste hydrochloric acid to first-time filtrate is 2.0, in temperature, is ageing 30min under the 343K condition, carries out secondary filter, secondary filter residue and once filter filter residue and return to chlorination furnace and recycle; Concentrated secondary filtrate obtains the calcium chloride crystal, and the HCl volatilized in concentration process, water vapour, through condensation, obtain highly purified hydrochloric acid, processes the raw material of regulating the pH value as coating.
Claims (4)
1. the method for comprehensive utilization of chlorination drip washing tail gas waste hydrochloric acid that process produces in a Titanium Dioxide Produced by Chloride Procedure production, comprise the following steps:
(1) the tail gas produced in the Titanium Dioxide Produced by Chloride Procedure production process is directly passed into to water scrubber, the tail gas after washing passes into caustic wash tower, and then tail gas directly discharges;
(2)
filterthe acid waste water produced in water-washing process, waste residue is recycled after collecting, and obtains first-time filtrate and a filter residue;
(3) add alkaline solution in first-time filtrate, carry out ageing, the water impurity in acid waste water is parsed;
(4) carry out secondary filter, obtain secondary filtrate and secondary filter residue, return to chlorination furnace with a filter residue as raw materials for production after the squeezing of secondary filter residue and recycle;
(5) secondary filtrate is carried out to evaporation and concentration, obtain the byproduct chloride, the gas that evaporation process produces, by condensation, obtains highly purified hydrochloric acid, can be used as coating and processes the raw material of regulating acidity.
2. the method for comprehensive utilization of chlorination drip washing tail gas waste hydrochloric acid that process produces in Titanium Dioxide Produced by Chloride Procedure production according to claim 1 is characterized in that: described step (1) in tail gas be to comprise HCl, TiCl
4, SiCl
4, the acid waste gas of hydrolysis can occur in chlorine etc.
3. the method for comprehensive utilization of chlorination drip washing tail gas waste hydrochloric acid that process produces in a kind of Titanium Dioxide Produced by Chloride Procedure production according to claim 1, it is characterized in that: described step is the middle pH value of using alkaline solution to regulate filtrate (3), at pH, be 2～2.5, temperature is under 343K～373K condition, ageing 30～70min.
4. the method for comprehensive utilization of a kind of Titanium Dioxide Produced by Chloride Procedure production chlorination drip washing tail gas waste hydrochloric acid that process produces according to claim 1, it is characterized in that: described step (3) neutral and alkali solution is limewash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103865278A CN103432867A (en) | 2013-08-30 | 2013-08-30 | Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103865278A CN103432867A (en) | 2013-08-30 | 2013-08-30 | Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103432867A true CN103432867A (en) | 2013-12-11 |
Family
ID=49686638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103865278A Pending CN103432867A (en) | 2013-08-30 | 2013-08-30 | Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103432867A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874590A (en) * | 2014-02-27 | 2015-09-02 | 龚家竹 | Resource processing method of chlorination waste residue |
| CN106044708A (en) * | 2016-05-26 | 2016-10-26 | 宜宾天原集团股份有限公司 | Method for comprehensively utilizing chlorination tail gas in chlorination-process titanium dioxide powder production procedures |
| CN106474876A (en) * | 2016-12-01 | 2017-03-08 | 攀枝花钢企欣宇化工有限公司 | The process reuse method of chlorinated exhaust in a kind of titanium sponge production |
| CN106512682A (en) * | 2016-12-15 | 2017-03-22 | 攀枝花钢企欣宇化工有限公司 | Chlorine-containing tail gas recycling method |
| CN108191105A (en) * | 2017-12-28 | 2018-06-22 | 攀枝花钢企欣宇化工有限公司 | A kind of Shu Zhi Jing Hua processing method of chlorinated exhaust wastewater eluting |
| CN110606471A (en) * | 2019-09-18 | 2019-12-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comprehensively utilizing low-temperature chlorination tail gas |
| CN112569761A (en) * | 2020-12-03 | 2021-03-30 | 山东鲁北企业集团总公司 | Device and method for treating tail gas of titanium dioxide produced by chlorination process and preparing water purifying agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082832A (en) * | 1975-05-06 | 1978-04-04 | Solex Research Corporation | Treatment of raw materials containing titanium |
| US20080267856A1 (en) * | 2007-04-24 | 2008-10-30 | Frederick Haydock | Removal of contaminants from by-product acids |
| CN201862357U (en) * | 2010-11-18 | 2011-06-15 | 金川集团有限公司 | Device for absorbing tail gas |
| CN102671520A (en) * | 2012-05-22 | 2012-09-19 | 贵州红星发展股份有限公司 | Titanium factory tail gas treatment method, produced titanium dioxide from tail gas and production method |
| CN102701153A (en) * | 2011-12-30 | 2012-10-03 | 锦州钛业有限公司 | Treatment method for titanium dioxide process waste acid generated by molten salt chlorination process |
-
2013
- 2013-08-30 CN CN2013103865278A patent/CN103432867A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082832A (en) * | 1975-05-06 | 1978-04-04 | Solex Research Corporation | Treatment of raw materials containing titanium |
| US20080267856A1 (en) * | 2007-04-24 | 2008-10-30 | Frederick Haydock | Removal of contaminants from by-product acids |
| CN201862357U (en) * | 2010-11-18 | 2011-06-15 | 金川集团有限公司 | Device for absorbing tail gas |
| CN102701153A (en) * | 2011-12-30 | 2012-10-03 | 锦州钛业有限公司 | Treatment method for titanium dioxide process waste acid generated by molten salt chlorination process |
| CN102671520A (en) * | 2012-05-22 | 2012-09-19 | 贵州红星发展股份有限公司 | Titanium factory tail gas treatment method, produced titanium dioxide from tail gas and production method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874590A (en) * | 2014-02-27 | 2015-09-02 | 龚家竹 | Resource processing method of chlorination waste residue |
| CN106044708A (en) * | 2016-05-26 | 2016-10-26 | 宜宾天原集团股份有限公司 | Method for comprehensively utilizing chlorination tail gas in chlorination-process titanium dioxide powder production procedures |
| CN106044708B (en) * | 2016-05-26 | 2018-08-17 | 宜宾天原集团股份有限公司 | The method of comprehensive utilization of chlorinated exhaust in Titanium Dioxide Produced by Chloride Procedure production process |
| CN106474876A (en) * | 2016-12-01 | 2017-03-08 | 攀枝花钢企欣宇化工有限公司 | The process reuse method of chlorinated exhaust in a kind of titanium sponge production |
| CN106512682A (en) * | 2016-12-15 | 2017-03-22 | 攀枝花钢企欣宇化工有限公司 | Chlorine-containing tail gas recycling method |
| CN108191105A (en) * | 2017-12-28 | 2018-06-22 | 攀枝花钢企欣宇化工有限公司 | A kind of Shu Zhi Jing Hua processing method of chlorinated exhaust wastewater eluting |
| CN108191105B (en) * | 2017-12-28 | 2021-08-13 | 攀枝花钢企欣宇化工有限公司 | Resin purification treatment method for leaching wastewater from chlorinated tail gas |
| CN110606471A (en) * | 2019-09-18 | 2019-12-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comprehensively utilizing low-temperature chlorination tail gas |
| CN112569761A (en) * | 2020-12-03 | 2021-03-30 | 山东鲁北企业集团总公司 | Device and method for treating tail gas of titanium dioxide produced by chlorination process and preparing water purifying agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103432867A (en) | Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production | |
| US20150014142A1 (en) | Method for processing waste water using zero process water discharge | |
| CN105948174A (en) | Comprehensive utilization method for chlorination-process titanium dioxide post-treatment wastewater | |
| CN104071820A (en) | Method for producing calcium fluoride by waste LCD panel glass etching liquid | |
| CN111592144A (en) | Treatment method of waste acid in photovoltaic industry | |
| CN103274418B (en) | Method for preparing sodium fluosilicate with industrial wastes, namely fluosilicic acid and sodium chloride | |
| CN111661972A (en) | Process for treating and recycling lead-zinc smelting flue gas washing waste acid | |
| CN106823714A (en) | The processing method of tail gas is calcined in a kind of titanium white production | |
| CN112897562A (en) | Method for purifying calcium fluoride from calcium fluoride sludge | |
| CN111807384A (en) | Polyolefin magnesium titanium catalyst production residue treatment process | |
| CN109607571A (en) | A kind of disposal of resources technique of highly concentrated organic spent lye | |
| CN107253777B (en) | Electrode foil corrosion waste liquid recovery process | |
| CN113800539B (en) | Technology for purifying and recycling salt in wet leaching solution of overhaul slag | |
| JP2006061754A (en) | Method and facilities for treating fluorine containing waste water | |
| CN112079364B (en) | Method for recycling fluorine-and iodine-containing waste material resources | |
| JP4969872B2 (en) | Sodium chloride production system | |
| CN106186500A (en) | Titaniferous method of wastewater treatment | |
| CN106474876A (en) | The process reuse method of chlorinated exhaust in a kind of titanium sponge production | |
| CN1225303C (en) | Method for controlling flue gas contaiing SO2 with NaCl and producing high concentratino SO2 | |
| CN101830584A (en) | Method for processing and forming distilled waste liquid of calcined soda with hydrochloric acid | |
| CN109231252B (en) | Separation of SO from high-concentration brine in plasma flue gas treatment42-Preparation of CaSO4Method and system of | |
| CN114715904A (en) | Method for cooperatively treating CVD dust and ammonium chloride waste liquid | |
| CN103864254A (en) | Lead and zinc treatment and comprehensive utilization method of pickling and phosphorizing acidic waste liquid of wire cable | |
| CN210103480U (en) | Polyolefin magnesium titanium catalyst production residue processing system | |
| JP2005144209A (en) | Fluorine-containing waste water treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131211 |
|
| WD01 | Invention patent application deemed withdrawn after publication |