CN1257116C - 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
- CN1257116C CN1257116C CN 200310104123 CN200310104123A CN1257116C CN 1257116 C CN1257116 C CN 1257116C CN 200310104123 CN200310104123 CN 200310104123 CN 200310104123 A CN200310104123 A CN 200310104123A CN 1257116 C CN1257116 C CN 1257116C
- Authority
- CN
- China
- Prior art keywords
- hydrochloric acid
- sodium hydroxide
- acid
- alkali
- sodium chloride
- 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.)
- Expired - Lifetime
Links
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims abstract description 72
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002351 wastewater Substances 0.000 title abstract 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 38
- 239000010865 sewage Substances 0.000 claims abstract description 27
- 239000011780 sodium chloride Substances 0.000 claims abstract description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 5
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 9
- 239000000460 chlorine Substances 0.000 claims description 9
- 229910052801 chlorine Inorganic materials 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 2
- 235000002639 sodium chloride Nutrition 0.000 abstract description 17
- 239000003513 alkali Substances 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 abstract 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Abstract
The present invention provides a method for processing sewage which respectively comprises sodium hydroxide and hydrochloric acid. In the method, sodium hydroxide containing sewage and hydrochloric acid containing sewage are respectively put into an alkali-proof container and an acid-proof container, and sodium hydroxide concentration in the alkali-proof container and hydrochloric acid concentration in the acid-proof container are respectively measured; hydrochloric acid containing waste water in the acid-proof container is proportionally poured into the alkali-proof container and is stirred, and then the sodium hydroxide and the hydrochloric acid sufficient react into a sodium chloride solution; table salt is put into the sodium chloride solution so as to prepare a sodium chloride solution with 250 to 310 mg sodium chloride in every 1000 ml water; the sodium chloride solution is electrolyzed so as to generate sodium hydroxide, hydrogen gas and chlorine gas, the hydrogen gas and the oxygen gas are collected, the hydrogen gas is ignited, and then the hydrogen gas and the chlorine gas react so as to generate hydrogen chloride which can be dissolved in water and can generate hydrochloric acid. The present invention has the advantages of good sewage treatment effect, low investment and high alkali and acid recovery 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 acidrespectively, 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 theacid-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 CN1554597A (en) | 2004-12-15 |
| CN1257116C true CN1257116C (en) | 2006-05-24 |
Family
ID=34333441
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 |
|---|---|
| CN (1) | CN1257116C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021601B (en) * | 2010-11-03 | 2012-05-23 | 陕西科技大学 | Electrolytic process of mixed liquor of waste diluted hydrochloric acid |
| HUE043980T2 (en) * | 2012-06-29 | 2019-09-30 | Australian Biorefining Pty Ltd | Process and apparatus for generating or recovering hydrochloric acid from metal salt solutions |
| CN103266231B (en) * | 2013-05-23 | 2015-08-05 | 中南大学 | A kind of Tungsten smelting method of high-efficiency cleaning |
| CN103253633B (en) * | 2013-06-05 | 2015-08-26 | 河北云山化工集团有限公司 | Chlorate electrolysis tail gas recycle hydrogen 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 |
| US20230322588A1 (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
Also Published As
| Publication number | Publication date |
|---|---|
| CN1554597A (en) | 2004-12-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20060524 |
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| CX01 | Expiry of patent term |