CN1554597A - Method for treating waste water contaning sodium hydroxide and hydrochloric acid separately - Google Patents
Method for treating waste water contaning sodium hydroxide and hydrochloric acid separately Download PDFInfo
- Publication number
- CN1554597A CN1554597A CNA2003101041231A CN200310104123A CN1554597A CN 1554597 A CN1554597 A CN 1554597A CN A2003101041231 A CNA2003101041231 A CN A2003101041231A CN 200310104123 A CN200310104123 A CN 200310104123A CN 1554597 A CN1554597 A CN 1554597A
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- hydrochloric acid
- sodium hydroxide
- waste water
- hydrogen
- produce
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The process of treating waste water containing sodium hydroxide and hydrochloric acid separately includes the following steps: holding the waste water containing sodium hydroxide and the waste water containing hydrochloric acid separately in alkali resistant container and acid resistant container, measuring their concentrations, mixing two kinds of waste water in certain ratio inside the sodium hydroxide solution container to produce sodium chloride solution, adding sodium chloride to the solution to form sodium chloride solution of 250-310 mg/L concentration, electrolyzing the solution to produce sodium hydroxide, hydrogen and chlorine, collecting hydrogen and chlorine, igniting hydrogen to react with chlorine to produce HCl and dissolving HCl in water to produce hydrochloric acid. The present invention has high waste water treating effect, less investment and high alkali and acid recovering rate.
Description
The technical field is as follows:
the present invention relates to a method for treating sewage, particularly to a method for treating sewage containing sodium hydroxide and hydrochloric acid respectively.
Background art:
the sewage containing sodium hydroxide or hydrochloric acid generated by overhauling pipeline packages and the like in production of factories is estimated to be discharged into river flow through a neutralization pond, and the environmental pollution is serious.
The invention content is as follows:
the invention aims to overcome the defects and provide a method for treating sewage containing sodium hydroxide and hydrochloric acid respectively, which has good sewage treatment effect, small investment and high alkali and acid recovery rates.
The purpose of the invention is realized by the following steps:
the invention discloses a method for treating sewage containing sodium hydroxide and hydrochloric acid respectively, which comprises the steps of respectively filling the sewage containing sodium hydroxide and hydrochloric acid into an alkali-resistant container and an acid-resistant container, respectively measuring the concentration of sodium hydroxide in the alkali-resistant container and the concentration of hydrochloric acid in the acid-resistant container, then pouring the sewage containing hydrochloric acid in the acid-resistant container into the alkali-resistant container according to a proportion, stirring to enable sodium hydroxide and hydrochloric acid to fully react to generate a sodium chloride solution, then adding table salt into the sodium chloride solution to enable the sodium chloride solution to become a sodium chloride solution containing 250-310 mg of sodium chloride in 1000ml of water, then electrolyzing to generate sodium hydroxide, hydrogen and chlorine, collecting the hydrogen and chlorine,igniting the hydrogen, the hydrogen and the chlorine to react to generate hydrogen chloride, and enabling the hydrogen, the hydrogen and the chlorine to be dissolved.
The reaction equation of the method of the invention is as follows:
by adopting the technical scheme, compared with the prior art, the method has the advantages of low investment, high alkali and acid recovery rate, simple and feasible method, good sewage treatment effect, radical environmental pollution and the like.
The specific implementation mode is as follows:
respectively filling sodium hydroxide-containing sewage and hydrochloric acid-containing sewage which are respectively discharged during pipeline maintenance and pipeline cleaning into an alkali-resistant container and an acid-resistant container, and mixing the sewage and the hydrochloric acid-containing sewage which are respectively discharged during pipeline maintenance and pipeline cleaning with alkali or acid for cleaning in other ways such as packaging, respectively measuring the equivalent concentrations of the sodium hydroxide sewage and the hydrochloric acid sewage in the alkali-resistant container and the acid-resistant container to be 0.5N and 0.25N, and putting a proper amount of hydrochloric acid sewage into the alkali-resistant container according to the proportion that 2000 kg of hydrochloric acid sewage is needed in 1000 kg of sodium hydroxide sewage to neutralize the sewage to generate a sodium chloride solution; and putting the sodium chloride solution into a salt solution dissolving tank, adding salt into the dissolving tank to enable the sodium chloride solution to become salt solution with 250-310 mg of sodium chloride in 1000ml of water, electrolyzing saturated salt solution according to the conventional electrolysis method to generate sodium hydroxide, hydrogen and chlorine, collecting the hydrogen and the chlorine, igniting the hydrogen, the hydrogen and the chlorine to react to generate hydrogen chloride, and dissolving the hydrogen chloride in the water to generate hydrochloric acid.
Claims (1)
1. The method for treating sewage containing sodium hydroxide and hydrochloric acid is characterized by that the sewage containing sodium hydroxide and hydrochloric acid are respectively placed in an alkali-resisting container and an acid-resisting container, the concentration of sodium hydroxide in the alkali-resisting container and the concentration of hydrochloric acid in the acid-resisting container are respectively measured, then the sewage containing hydrochloric acid in the acid-resisting container is poured into the alkali-resisting container according to a certain proportion, and stirred so as to make sodium hydroxide and hydrochloric acid fully react to produce sodium chloride solution, then the sodium chloride solution is added with edible salt so as to obtain sodium chloride solution containing 250-310 mg of sodium chloride in 1000ml of water, then it is electrolyzed to produce sodium hydroxide, hydrogen and chlorine, then the hydrogen and chlorine are collected, and ignited to react to produce hydrogen chloride, so that it can be dissolved in water to produce hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310104123 CN1257116C (en) | 2003-12-26 | 2003-12-26 | Method for treating waste water contaning sodium hydroxide and hydrochloric acid separately |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310104123 CN1257116C (en) | 2003-12-26 | 2003-12-26 | Method for treating waste water contaning sodium hydroxide and hydrochloric acid separately |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1554597A true CN1554597A (en) | 2004-12-15 |
| CN1257116C CN1257116C (en) | 2006-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310104123 Expired - Lifetime CN1257116C (en) | 2003-12-26 | 2003-12-26 | Method for treating waste water contaning sodium hydroxide and hydrochloric acid separately |
Country Status (1)
| Country | Link |
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| CN (1) | CN1257116C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021601A (en) * | 2010-11-03 | 2011-04-20 | 陕西科技大学 | Electrolytic process of mixed liquor of waste diluted hydrochloric acid |
| CN103253633A (en) * | 2013-06-05 | 2013-08-21 | 河北云山化工集团有限公司 | Method for recovering hydrogen from tail gas of chlorate electrolysis |
| CN103266231A (en) * | 2013-05-23 | 2013-08-28 | 中南大学 | High-efficiency and clean tungsten smelting method |
| CN104641018A (en) * | 2012-06-29 | 2015-05-20 | 澳大利亚生物精制私人有限公司 | Process and apparatus for generating or recovering hydrochloric acid from metal salt solutions |
| CN109678164A (en) * | 2018-12-25 | 2019-04-26 | 江西双龙硅材料科技有限公司 | A kind of environmentally protective white carbon black, caustic soda recycle combine production method |
| WO2023196226A1 (en) * | 2022-04-08 | 2023-10-12 | Macdermid, Incorporated | Electrochemical oxidation of amine complexants in waste streams from electroplating processes |
-
2003
- 2003-12-26 CN CN 200310104123 patent/CN1257116C/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021601A (en) * | 2010-11-03 | 2011-04-20 | 陕西科技大学 | Electrolytic process of mixed liquor of waste diluted hydrochloric acid |
| CN104641018A (en) * | 2012-06-29 | 2015-05-20 | 澳大利亚生物精制私人有限公司 | Process and apparatus for generating or recovering hydrochloric acid from metal salt solutions |
| CN103266231A (en) * | 2013-05-23 | 2013-08-28 | 中南大学 | High-efficiency and clean tungsten smelting method |
| CN103266231B (en) * | 2013-05-23 | 2015-08-05 | 中南大学 | A kind of Tungsten smelting method of high-efficiency cleaning |
| CN103253633A (en) * | 2013-06-05 | 2013-08-21 | 河北云山化工集团有限公司 | Method for recovering hydrogen from tail gas of chlorate electrolysis |
| CN109678164A (en) * | 2018-12-25 | 2019-04-26 | 江西双龙硅材料科技有限公司 | A kind of environmentally protective white carbon black, caustic soda recycle combine production method |
| CN109678164B (en) * | 2018-12-25 | 2022-05-03 | 江西双龙硅材料科技有限公司 | Environment-friendly white carbon black and caustic soda circulating joint production method |
| WO2023196226A1 (en) * | 2022-04-08 | 2023-10-12 | Macdermid, Incorporated | Electrochemical oxidation of amine complexants in waste streams from electroplating processes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1257116C (en) | 2006-05-24 |
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| SE01 | Entry into force of request for substantive examination | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20060524 |