CN106591873A - Treating and recycling method of sodium hypochlorite-containing waste liquid - Google Patents
Treating and recycling method of sodium hypochlorite-containing waste liquid Download PDFInfo
- Publication number
- CN106591873A CN106591873A CN201610951455.0A CN201610951455A CN106591873A CN 106591873 A CN106591873 A CN 106591873A CN 201610951455 A CN201610951455 A CN 201610951455A CN 106591873 A CN106591873 A CN 106591873A
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- CN
- China
- Prior art keywords
- brine
- sodium hypochlorite
- waste liquid
- treating
- sodium
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
Abstract
The invention discloses a treating and recycling method of sodium hypochlorite-containing waste liquid. The method comprises the following steps: (1) simultaneously conveying the sodium hypochlorite-containing waste liquid and a hydrogen peroxide solution from the top into an absorption tower to obtain treating liquid; (2) conveying the treating liquid to a rear reactor at a primary brine workshop section, carrying out reaction with crude brine to generate calcium carbonate precipitates, and enabling the liquid to flow into a middle tank; (3) adding sodium sulfite into the middle tank, carrying out stirring and filtering, and collecting pre-treated brine; and (4) adding hydrochloric acid into the pre-treated brine, and adjusting the PH to 9 to 11 to obtain primary fine brine. According to the treating and recycling method, the hydrogen peroxide solution is used for treating the sodium hypochlorite-containing waste liquid produced by a device for preparing chloride by catalytic oxidization of hydrogen chloride, and the treating liquid is recycled as a raw material for a saline solution desalting workshop section for electrolysis, so that recycling of resources is realized, and the environment is protected. Effective treatment and recycling of the sodium hypochlorite-containing waste liquid are realized.
Description
Technical field
The invention belongs to chemical technology field, and in particular to the treatment for reuse method containing sodium hypochlorite waste liquid.
Background technology
Chlorine is a kind of important basic chemical industry raw material, is mainly prepared by electrolytic saltwater at present.With industry
An urgent demand of the chlorine circulation for being continuously increased and thus bringing of by-product hydrogen chloride, catalytic oxidation of hydrogen chloride for preparing chlorine gas technology are wide
General concern is got up.
During catalytic oxidation of hydrogen chloride for preparing chlorine gas, alkane chlorination, ethylene oxychlorination, MDI and TDI production is usually used
Hydrogen chloride Deng byproduct in process as raw material, wherein containing the nothing such as the Organic substances such as a small amount of ethylene, chlorobenzene and carbon monoxide
Machine thing, these Organic substances and inorganic matters are converted to carbon dioxide during the catalytic oxidation of hydrogen chloride, with product chlorine and
Unconverted hydrogen chloride and oxygen enter product separation system together.
In product separation system, unconverted hydrogen chloride is absorbed by most of removing, remaining chlorine, oxygen by water
After chilled with carbon dioxide, chlorine is freezed by major part, the remaining oxygen and carbon dioxide for containing a small amount of chlorine, is
The utilization rate of oxygen is improved, oxygen of this part containing a small amount of chlorine and carbon dioxide need to be returned to reaction member,
If all returned, the carbon dioxide in system constantly can be accumulated, and then adverse effect is brought to catalytic oxidation, therefore need
Continuously to discharge least a portion of recyclegas and be in below technique safe level with the gas concentration lwevel in guarantee system.This portion
Divide the oxygen containing a small amount of chlorine and carbon dioxide generally useless using the alkalescence containing sodium hypochlorite is changed into after NaOH solution absorption
Liquid, being re-used as industrial wastewater carries out processing qualified rear discharge up to standard.This method not only increases scale wastewater treatment amount and place
Reason cost, Sodium Chloride, sodium carbonate in waste liquid etc. can not be utilized effectively.In view of this, if it is possible to find above-mentioned useless
Liquid process and the method for reuse, then can both realize resource reutilization, cost-effective, can reduce environmental pollution again.
The content of the invention
It is an object of the invention to provide a kind for the treatment of for reuse method containing sodium hypochlorite waste liquid, to overcome prior art to deposit
Defect.
Process containing sodium hypochlorite waste liquid of the present invention and reuse method, comprise the steps：
(1) sodium hypochlorite waste liquid and hydrogenperoxide steam generator will be contained while absorption tower is conveyed into from top, react in absorber portion
Afterwards, flow into and absorb tower reactor, obtain treatment fluid；
It is 50～60 DEG C to absorb bottom temperature, excessive hydrogen peroxide is decomposed completely；
(2) treatment fluid for obtaining step (1), is delivered to the post-reactor of primary brine workshop section, reacts with crude brine, raw
Into precipitation of calcium carbonate, medial launder is flowed into；
The crude brine includes the component such as percentage by weight：
Sodium Chloride 20～26%, Ca2+0.01～0.15%, water surplus；
Treatment fluid is 1 with the weight ratio of crude brine:10～550；
(3) medial launder is added and then by sodium sulfite, is stirred 0.5～1.5 hour, filtered, collect pretreatment saline；
Treatment fluid is 1 with the weight ratio of sodium sulfite:0.00015～0.002；
(4) hydrochloric acid is added into the pretreatment saline obtained by step (3), adjusts PH to 9～11, obtain a refined brine；
A described refined brine, including following percentage by weight in component：
Sodium hydroxide 0～0.003%, Sodium Chloride 19～26%, Ca2+0.00005～0.00025%, can be used for secondary salt
Electrolytic production of chlorine gas and Caustic soda are carried out after the process of water conservancy project section；
In step (1), the waste liquid containing sodium hypochlorite that described catalytic oxidation of hydrogen chloride for preparing chlorine gas device is produced, including it is following
Component (mass fraction wt%)：
Hydrogenperoxide steam generator described in step (1), its concentration are 1～30% (mass fraction wt%)；Hydrogenperoxide steam generator
Extra proportion be 0.1～5% (mol ratios).
In the treatment fluid that step (2) is obtained, sodium hypochlorite content is less than 0.05% (mass fraction wt%)；
The beneficial effects of the present invention is：
The present invention is given up what catalytic oxidation of hydrogen chloride for preparing chlorine gas device was produced containing sodium hypochlorite with hydrogenperoxide steam generator first
Liquid is processed, then treatment fluid is carried out reuse as electrolysis with the raw material of Sal hydratable salt workshop section, realizes resource reutilization,
Entreprise cost is reduced, while protecting environment.Realize the effective process containing sodium hypochlorite waste liquid and reuse, technical process letter
Single, equipment investment is few, easily operated, and not only enterprise saves cost for wastewater treatment and cost of material, is also greatly reduced waste liquid
The environmental pollution that discharge may bring.
Specific embodiment
The specific embodiment of the present invention is described in detail below by embodiment.
Embodiment 1
(1) (concrete component and content are shown in Table the waste liquid containing sodium hypochlorite for producing catalytic oxidation of hydrogen chloride for preparing chlorine gas device
1) with the flow of 1000kg/h from top send into absorption tower, while by the hydrogenperoxide steam generator of mass percent 8% with
The flow of 114.3kg/h sends into absorption tower from top；
Waste liquid containing sodium hypochlorite and hydrogen peroxide in absorption tower, after fast reaction, are flowed into and absorb tower reactor, absorption tower bottom portion
Stirring is in normally open, and makes solution temperature in tower reactor maintain 55 DEG C by chuck hot water, to promote slightly excessive peroxide
Change hydrogen to decompose completely, absorb tower reactor and obtain treatment fluid, component and content are shown in Table 1；
(2) treatment fluid 1408kg pumps are delivered in the post-reactor of primary brine workshop section, with crude brine (concrete component
And content is shown in Table 2) 150000kg reactions and generates precipitation of calcium carbonate, flows into medial launder；
(3) 2kg anhydrous sodium sulfite is added into medial launder, stirs 1 hour, filtered into HVM film filters, collected
Filtrate；
(4) filtrate is entered in baffling groove, adds the hydrochloric acid solution 41.3kg that weight concentration is 31%, is obtained after adjusting PH to 10
To a refined brine (concrete component and content are shown in Table 2), then it is delivered to secondary brine workshop section and is for further processing.
1 waste liquid containing sodium hypochlorite of table and treatment fluid component and content (mass fraction wt%)
2 crude brine of table and a refined salt water component and content (mass fraction wt%)
From table 1 and table 2 as can be seen that waste liquid containing sodium hypochlorite processes the treatment fluid for obtaining through hydrogen oxide, can be used as carbon
The succedaneum of sour sodium is used in the post-reactor of primary brine workshop section, not only reduces primary brine workshop section carbon to a certain extent
The consumption of sour sodium and Sodium Chloride, also effectively prevent the environmental pollution that discharging of waste liquid may bring.
Claims (9)
1. the treatment for reuse method of sodium hypochlorite waste liquid is contained, it is characterised in that comprised the steps：
(1) sodium hypochlorite waste liquid and hydrogenperoxide steam generator will be contained while absorption tower is conveyed into from top, after absorber portion reaction, stream
Enter to absorb tower reactor, obtain treatment fluid；
(2) treatment fluid for obtaining step (1), is delivered to the post-reactor of primary brine workshop section, reacts with crude brine, generates carbon
Sour calcium deposit, flows into medial launder；
(3) medial launder is added and then by sodium sulfite, is stirred, filtered, collect pretreatment saline；
(4) hydrochloric acid is added into the pretreatment saline obtained by step (3), adjusts PH to 9～11, obtain a refined brine.
2. method according to claim 1, it is characterised in that it is 50～60 DEG C to absorb bottom temperature.
3. method according to claim 1, it is characterised in that in step (2), the crude brine is included such as percentage by weight
Component：Sodium Chloride 20～26%, Ca2+0.01～0.15%, water surplus.
4. method according to claim 3, it is characterised in that treatment fluid is 1 with the weight ratio of crude brine:10～550.
5. method according to claim 1, it is characterised in that in step (3), sodium sulfite is added medial launder, stirs
0.5～1.5 hour, treatment fluid was 1 with the weight ratio of sodium sulfite:0.00015～0.002.
6. method according to claim 1, it is characterised in that a described refined brine, including following percentage by weight
In component：Sodium hydroxide 0～0.003%, Sodium Chloride 19～26%, Ca2+0.00005～0.00025%.
7. method according to claim 1, it is characterised in that in step (1), described catalytic oxidation of hydrogen chloride for preparing chlorine gas
The waste liquid containing sodium hypochlorite that device is produced, including following components (mass fraction wt%)：
8. method according to claim 1, it is characterised in that the hydrogenperoxide steam generator described in step (1), its concentration are 1
～30% (mass fraction wt%)；The extra proportion of hydrogenperoxide steam generator is 0.1～5% (mol ratio).
9. method according to claim 1, it is characterised in that in the treatment fluid that step (2) is obtained, sodium hypochlorite content is little
In 0.05% (mass fraction wt%).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610951455.0A CN106591873A (en) | 2016-10-27 | 2016-10-27 | Treating and recycling method of sodium hypochlorite-containing waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610951455.0A CN106591873A (en) | 2016-10-27 | 2016-10-27 | Treating and recycling method of sodium hypochlorite-containing waste liquid |
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| CN106591873A true CN106591873A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610951455.0A Pending CN106591873A (en) | 2016-10-27 | 2016-10-27 | Treating and recycling method of sodium hypochlorite-containing waste liquid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107585903A (en) * | 2017-08-16 | 2018-01-16 | 上海氯碱化工股份有限公司 | The treatment for reuse method of containing sodium carbonate and sodium hypochlorite light salt brine |
| CN108002622A (en) * | 2017-11-16 | 2018-05-08 | 王小军 | A kind of method administered with remanufacture benzofuraxan waste liquid |
| CN113860332A (en) * | 2021-07-20 | 2021-12-31 | 乳源东阳光电化厂 | Recycling method of sodium hypochlorite-containing waste liquid |
| CN114984735A (en) * | 2022-06-14 | 2022-09-02 | 中盐内蒙古化工钠业有限公司 | Treatment method for chlorine absorption by sodium hydroxide solution |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105884090A (en) * | 2016-05-10 | 2016-08-24 | 浙江钛合工程技术有限公司 | Method for recycling chlor-alkali industrial tail gas absorption wastewater |
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2016
- 2016-10-27 CN CN201610951455.0A patent/CN106591873A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105884090A (en) * | 2016-05-10 | 2016-08-24 | 浙江钛合工程技术有限公司 | Method for recycling chlor-alkali industrial tail gas absorption wastewater |
Non-Patent Citations (2)
| Title |
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| 全国安全生产教育培训教材编审委员会 组织编写: "《氯碱电解工艺作业》", 30 April 2013, 中国矿业大学出版社 * |
| 姚琪范: "浅谈无机陶瓷膜一代与三代盐水精制技术工艺的区别及改进", 《甘肃科技》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107585903A (en) * | 2017-08-16 | 2018-01-16 | 上海氯碱化工股份有限公司 | The treatment for reuse method of containing sodium carbonate and sodium hypochlorite light salt brine |
| CN107585903B (en) * | 2017-08-16 | 2020-10-30 | 上海氯碱化工股份有限公司 | Method for treating and recycling dilute brine containing sodium carbonate and sodium hypochlorite |
| CN108002622A (en) * | 2017-11-16 | 2018-05-08 | 王小军 | A kind of method administered with remanufacture benzofuraxan waste liquid |
| CN113860332A (en) * | 2021-07-20 | 2021-12-31 | 乳源东阳光电化厂 | Recycling method of sodium hypochlorite-containing waste liquid |
| CN114984735A (en) * | 2022-06-14 | 2022-09-02 | 中盐内蒙古化工钠业有限公司 | Treatment method for chlorine absorption by sodium hydroxide solution |
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Application publication date: 20170426 |
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