CN1763232A - Apparatus for recovering Hg from Hg-containing sludge and waste water - Google Patents
Apparatus for recovering Hg from Hg-containing sludge and waste water Download PDFInfo
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- CN1763232A CN1763232A CNA2005100940696A CN200510094069A CN1763232A CN 1763232 A CN1763232 A CN 1763232A CN A2005100940696 A CNA2005100940696 A CN A2005100940696A CN 200510094069 A CN200510094069 A CN 200510094069A CN 1763232 A CN1763232 A CN 1763232A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The present invention is mercury (Hg) recovering apparatus, in which Hg is recovered from Hg containing sludge and waste water through the following steps: dissolving Hg containing sludge in hydrochloric acid and mixing with Hg containing waste water to produce stable Hg complexed anion [HgCl4]-2; ion exchanging to adsorb [HgCl4]-2 with strong alkali anion exchange resin and desorbing with concentrated hydrochloric acid solution, alkali sulfide or sodium bisulfite as desorbing agent to obtain Hg cation; reducing Hg cation in electrolyzer to obtain recovered Hg.
Description
Technical Field
The invention relates to a device for recovering mercury.
Background
From the viewpoint of environmental protection, it is necessary to treat the heavy-hazard sludge containing mercury and the waste water containing mercury, the mercury and the toxicity of the compounds cause the intension of water quality guarantee, the mercury is the representative substance of heavy metal pollution, so it is necessary to have a device for recovering the mercury.
The invention content is as follows:
the invention aims to provide a device for recovering mercury from mercury-containing sludge and mercury-containing wastewater.
The technical scheme of the invention is as follows: the device is characterized in that mercury (Hg) containing sludge is dissolved by hydrochloric acid and then is mixed with mercury (Hg) containing wastewater to form a mercury (Hg) containing salt solution; mercury (Hg) can generate stable mercury complex anion { HgCl]in the presence of excessive chloride ion4}-2Adsorbing mercury complex anions { HgCl]by using an ion exchange method and selecting strong-base anion exchange resin4}-2Afterreplacement of the strongly basic anion exchange resin having adsorbed mercury (Hg), the mercury complex anion { HgCl } can be decomposed using concentrated hydrochloric acid as a desorbent4}-2To mercury cation [ HgCl]4]Thereby realizing desorption, and the desorbed mercury cation [ HgCl]4]Can be reduced to mercury (Hg) in the electrolytic cell for regeneration and recovery.
After the strongly basic anion exchange resin adsorbing mercury (Hg) is replaced, the mercury complex anion { HgCl } can be decomposed by using alkali sulfide as a desorbent4}-2To mercury cation [ HgCl]4]Thereby realizing desorption; or after replacing strongly basic anion exchange resin adsorbing mercury (Hg), sodium bisulfite can be used as desorbent to decompose mercury complex anion { HgCl }4}-2To mercury cation [ HgCl]4]Thereby realizing desorption.
Since the above-mentioned change in the concentration of the mercury (Hg) -containing salt solution and the mercury (Hg) content has a large influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the concentration of the salt solution, the higher the concentration of the mercury (Hg), the higher the exchange adsorption amount of the strongly basic anion exchange resin, and therefore the salt concentration in the mercury (Hg) -containing salt solution should be controlled to 50g/L or less.
Since the change in the pH of the mercury (Hg) -containing salt solution has a large influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the pH of the salt solution, the lower the exchange adsorption amount of the strongly basic anion exchange resin, and therefore, the pH of the salt solution should be controlled to 2 or more when the mercury (Hg) -containing sludge is dissolved by addinghydrochloric acid.
The invention has the positive use effects that: the device is characterized in that the mercury (Hg) containing sludge is dissolved by hydrochloric acid and then is mixed with mercury (Hg) containing wastewater to form a mercury (Hg) containing salt solution; mercury (Hg) can generate stable mercury complex anion { HgCl]in the presence of excessive chloride ion4}-2Adsorbing mercury complex anions { HgCl]by using an ion exchange method and selecting strong-base anion exchange resin4}-2The reaction equation is;
after replacement of the strongly basic anion exchange resin having adsorbed mercury (Hg), the mercury complex anion { HgCl } can be decomposed using concentrated hydrochloric acid as a desorbent4}-2To mercury cation [ HgCl]4]Thereby realizing desorption, and the desorbed mercury cation [ HgCl]4]Can be reduced to mercury (Hg) in an electrolytic cell to realize regeneration and recovery; because the change of the mercury (Hg) containing salt solution and the concentration of the mercury (Hg) has great influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the concentration of the salt solution is, the higher the concentration of the mercury (Hg) is, the higher the exchange adsorption amount of the strongly basic anion exchange resin is, so the salt concentration in the mercury (Hg) containing salt solution is controlled below 50 g/L; since the change in the pH of the mercury (Hg) -containing salt solution has a large influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the pH of the salt solution, the lower the exchange adsorption amount of the strongly basic anion exchange resin, and therefore, the dissolution in hydrochloric acid is performedThe pH of the salt solution should be controlled above 2 for mercury (Hg) containing sludge. The invention relates to a device for recovering mercury from mercury-containing sludge and mercury-containing wastewater, which is safe, reliable, stable in performance and wide in application.
Drawings
FIG. 1 is a basic schematic diagram of an apparatus for recovering mercury from a mercury-containing sludge and a mercury-containing wastewater.
Detailed Description
Examples
The device for recovering mercury from mercury-containing sludge and mercury-containing wastewater in the embodiment of the invention meets the relevant technical standards; referring to fig. 1, the device comprises a step of dissolving mercury (Hg) containing sludge by hydrochloric acid, and mixing the dissolved mercury (Hg) containing sludge with mercury (Hg) containing wastewater to form a mercury (Hg) containing salt solution, wherein the mercury (Hg) containing sludge is dissolved by hydrochloric acid and then filtered to remove residues, and the flow rate of the filtering is not less than 2 cubic meters per hour;mercury (Hg) can generate stable mercury complex anion { HgCl]in the presence of excessive chloride ion4}-2Adsorbing mercury complex anions { HgCl]by using an ion exchange method and selecting strong-base anion exchange resin4}-2In this embodiment, the strong base anion exchange resin can be Amberlite IRA-900-CL-Macroporous strong basic resin; in this embodiment, the reaction equation is;
after replacement of the strongly basic anion exchange resin having adsorbed mercury (Hg), the mercury complex anion { HgCl } can be decomposed using concentrated hydrochloric acid as a desorbent4}-2To mercury cation [ HgCl]4]To achieve desorption, the concentration of concentrated hydrochloric acid as the desorbent should be 33%; desorbed mercury cations [ HgCl]4]Can be used in an electrolytic cellReducing the mercury (Hg) to realize regeneration and recovery; because the change of the mercury (Hg) containing salt solution and the concentration of the mercury (Hg) has great influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the concentration of the salt solution is, the higher the concentration of the mercury (Hg) is, the higher the exchange adsorption amount of the strongly basic anion exchange resin is, so the salt concentration in the mercury (Hg) containing salt solution is controlled below 50 g/L; since the change in the pH of the mercury (Hg) -containing salt solution has a large influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the pH of the salt solution, the lower the exchange adsorption amount of the strongly basic anion exchange resin, and therefore, the pH of the salt solution should be controlled to 2 or more when the mercury (Hg) -containing sludge is dissolved by adding hydrochloric acid. The residual salt solution can be reused, and if the salt solution needs to be discharged, the salt solution can be discharged after being diluted and neutralized by fresh water; if the concentration of hydrochloric acid in the remaining salt solution does not meet the discharge standard, the salt solution must be diluted with an alkali solution for neutralization before discharge. In other embodiments, the mercury complex anion { HgCl } may be decomposed using a sodium sulfide as a desorbent after replacing the strongly basic anion exchange resin that has adsorbed mercury (Hg)4}-2To mercury cation [ HgCl]4]Thereby realizing desorption; in other embodiments, or after replacement of the strongly basic anion exchange resin with adsorbed mercury, the mercury complex anion { HgCl } may be decomposed using sodium bisulfite as the desorbent4}-2To mercury cation [ HgCl]4]Thereby realizing desorption.
The invention relates to a device for recovering mercury from mercury-containing sludge and mercury-containing wastewater, which is safe, reliable, stable in performance and wide in application.
Claims (4)
1. The utility model provides a retrieve device of mercury from mercurous silt and mercurous waste water which characterized in that: dissolving mercury (Hg) containing sludge by hydrochloric acid, and mixing the dissolved mercury (Hg) containing sludge with mercury (Hg) containing wastewater to form a mercury (Hg) containing salt solution: mercury (Hg) can generate stable mercury complex anion { HgCl]in the presence of excessive chloride ion4}-2Adsorbing mercury complex anions { HgCl]by using an ion exchange method and selecting strong-base anion exchange resin4}-2After replacement of the strongly basic anion exchange resin having adsorbed mercury (Hg), the mercury complex anion { HgCl } can be decomposed using concentrated hydrochloric acid as a desorbent4}-2To mercury cation [ HgCl]4]Thereby realizing desorption, and the desorbed mercury cation [ HgCl]4]Can be reduced to mercury (Hg) in the electrolyticcell for regeneration and recovery.
2. The apparatus of claim 1, wherein the apparatus further comprises: after replacement of strongly basic anion exchange resin having adsorbed mercury (Hg), mercury complex anion { HgCl } can be decomposed using alkali sulfide as a desorbent4}-2To mercury cation [ HgCl]4]Thereby realizing desorption; or after replacing strongly basic anion exchange resin adsorbing mercury (Hg), sodium bisulfite can be used as desorbent to decompose mercury complex anion { HgCl }4}-2To mercury cation [ HgCl]4]Thereby realizing desorption.
3. The apparatus of claim 1, wherein the apparatus further comprises: since the change in the concentration of the mercury (Hg) -containing salt solution and the mercury (Hg) content has a large influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the concentration of the salt solution, the higher the concentration of the mercury (Hg), the higher the exchange adsorption amount of the strongly basic anion exchange resin, and therefore the salt concentration in the mercury (Hg) -containing salt solution should be controlled to 50g/L or less.
4. The apparatus of claim 1, wherein the apparatus further comprises: since the change in the pH of the mercury (Hg) -containing salt solution has a large influence on the exchange adsorption amount of the strongly basic anion exchange resin, the lower the pH of the salt solution, the lower the exchange adsorption amount of the strongly basic anion exchange resin, and therefore, the pH of the salt solution should be controlled to 2 or more when the mercury (Hg) -containing sludge is dissolved by adding hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100940696A CN1763232A (en) | 2005-08-29 | 2005-08-29 | Apparatus for recovering Hg from Hg-containing sludge and waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100940696A CN1763232A (en) | 2005-08-29 | 2005-08-29 | Apparatus for recovering Hg from Hg-containing sludge and waste water |
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| CN1763232A true CN1763232A (en) | 2006-04-26 |
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| CNA2005100940696A Pending CN1763232A (en) | 2005-08-29 | 2005-08-29 | Apparatus for recovering Hg from Hg-containing sludge and waste water |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100532290C (en) * | 2007-11-30 | 2009-08-26 | 华南理工大学 | Method for processing paroxysmal mercury polluted water under emergency condition |
| CN101955158A (en) * | 2010-10-20 | 2011-01-26 | 昊华宇航化工有限责任公司 | Recovery treatment process of mercury-containing waste hydrochloric acid |
| CN103102023A (en) * | 2011-11-10 | 2013-05-15 | 陶氏环球技术有限公司 | Process for removing and recycling mercury out of mercury-containing waste acid and wastewater |
| CN105731593A (en) * | 2014-12-10 | 2016-07-06 | 陶氏环球技术有限公司 | Method for removing mercury from solution |
| CN109811130A (en) * | 2019-02-18 | 2019-05-28 | 广州大学 | A method of thallium and mercury are recycled from acid waste water is smelted |
| CN109811129A (en) * | 2019-02-18 | 2019-05-28 | 广州大学 | A method of thallium, mercury and chromium are recycled from acid waste water is smelted |
| CN109942133A (en) * | 2019-03-22 | 2019-06-28 | 中科京投环境科技江苏有限公司 | A kind of mercury recyclable device of mercury-containing waste water |
-
2005
- 2005-08-29 CN CNA2005100940696A patent/CN1763232A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100532290C (en) * | 2007-11-30 | 2009-08-26 | 华南理工大学 | Method for processing paroxysmal mercury polluted water under emergency condition |
| CN101955158A (en) * | 2010-10-20 | 2011-01-26 | 昊华宇航化工有限责任公司 | Recovery treatment process of mercury-containing waste hydrochloric acid |
| CN101955158B (en) * | 2010-10-20 | 2013-01-23 | 昊华宇航化工有限责任公司 | Recovery treatment process of mercury-containing waste hydrochloric acid |
| CN103102023A (en) * | 2011-11-10 | 2013-05-15 | 陶氏环球技术有限公司 | Process for removing and recycling mercury out of mercury-containing waste acid and wastewater |
| CN103102023B (en) * | 2011-11-10 | 2016-07-06 | 陶氏环球技术有限公司 | The removal of mercury of mercurous spent acid and waste water and hydrargyrum recovery process |
| CN105731593A (en) * | 2014-12-10 | 2016-07-06 | 陶氏环球技术有限公司 | Method for removing mercury from solution |
| CN105731593B (en) * | 2014-12-10 | 2021-03-09 | 陶氏环球技术有限公司 | Method for removing mercury from solution |
| CN109811130A (en) * | 2019-02-18 | 2019-05-28 | 广州大学 | A method of thallium and mercury are recycled from acid waste water is smelted |
| CN109811129A (en) * | 2019-02-18 | 2019-05-28 | 广州大学 | A method of thallium, mercury and chromium are recycled from acid waste water is smelted |
| CN109942133A (en) * | 2019-03-22 | 2019-06-28 | 中科京投环境科技江苏有限公司 | A kind of mercury recyclable device of mercury-containing waste water |
| CN109942133B (en) * | 2019-03-22 | 2023-09-08 | 中科京投环境科技江苏有限公司 | Mercury recovery device of mercury-containing wastewater |
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