CN1821055A - High-pollution low-concentration waste acid recycling method - Google Patents
High-pollution low-concentration waste acid recycling method Download PDFInfo
- Publication number
- CN1821055A CN1821055A CN 200610049658 CN200610049658A CN1821055A CN 1821055 A CN1821055 A CN 1821055A CN 200610049658 CN200610049658 CN 200610049658 CN 200610049658 A CN200610049658 A CN 200610049658A CN 1821055 A CN1821055 A CN 1821055A
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- CN
- China
- Prior art keywords
- sodium
- chlor
- waste water
- low concentration
- waste acid
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002699 waste material Substances 0.000 title claims abstract description 16
- 239000002253 acid Substances 0.000 title claims abstract description 15
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002351 wastewater Substances 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 5
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 5
- 238000006386 neutralization reaction Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 235000012976 tarts Nutrition 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 230000003472 neutralizing effect Effects 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 4
- 230000002378 acidificating effect Effects 0.000 abstract 2
- 239000011780 sodium chloride Substances 0.000 abstract 2
- 238000007670 refining Methods 0.000 abstract 1
- 239000012452 mother liquor Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010795 gaseous waste Substances 0.000 description 1
- 230000009395 genetic defect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a recycling method of waste acid with high pollution and low concentration, which is characterized in that waste water containing sulfuric acid is concentrated, filtered to remove impurities, added with sodium chloride for reaction, and the hydrogen chloride generated by the reaction is absorbed by a multi-stage packed tower to prepare industrial hydrochloric acid; neutralizing the acidic mixed salt generated by the reaction, removing impurities and decoloring, and directly using one part of the acidic mixed salt; and refining the other part of the mixed salt, and separating sodium chloride and sodium sulfate. The method comprehensively recycles the waste water containing the low-concentration waste acid, has high treatment efficiency and recycling rate, has low equipment investment, greatly reduces the discharge of sewage and the generation of secondary pollutants, and has considerable economic benefit.
Description
Technical field
The present invention relates to the wastewater treatment in the field of environment protection, especially relate to a kind of comprehensive treating process recoverying and utilizing method of high polluted low concentration waste acid.
Background technology
Usually the sulfur waste acid of lower concentration all is to adopt following method to handle.
1, adopts the shunting of removing contamination, use in the lime and the method for absorption to the mother liquor material, thereby can produce the solid refuse of a large amount of secondary pollutions, still have a large amount of pollution factors and suspended substance in the waste water after handling simultaneously, and also need to mix after degraded of iron carbon tower and biological treatment with the certain acidity washings, thereby bring very big difficulty to wastewater treatment, consumption of natural resource and cost have very big harm to the biological treatment bacterial classification significantly.
2, adopt mother liquor, the degraded of washing lotion blended iron carbon and biological treatment, can consume iron powder and expensive chemical reagent greatly.
3, adopt other method: also exist problems such as energy consumption is big, cost is high, the manpower waste is big as ozone method, electrolytic process and strong oxidizer method.
In sum, just at present in the relevant wastewater processing technology of usefulness ubiquity have high input, shortcomings such as energy consumption is big, workload is big, cost is high, poor processing effect.
Summary of the invention
The inventive method provides a kind of treatment process of low-concentration waste acid comprehensive reutilization, and the recovery utilization rate height significantly reduces the sewage emissions amount, and economic benefit is considerable.
Method for recycling high polluted low concentration waste acid of the present invention is: will contain vitriolic waste water multiple-effect and concentrate, and add sodium-chlor behind the filtering and impurity removing and react, and the hydrogenchloride that reaction generates, water absorbs, and makes technical hydrochloric acid; The tart mixed salt that reaction generates is after neutralization, and after the removal of impurities decolouring, a part directly can be utilized; The mixed salt of another part is isolated sodium-chlor and sodium sulfate after making with extra care.
Described vitriolated waste water concentrates by the multiple-effect concentration systems, and concentrating back acidity is 30～75%.Sulfuric acid reaction carries out in still pot in described sodium-chlor and the waste water, and the add-on of sodium-chlor is: the vitriolic mol ratio is in sodium-chlor and the waste water: 0.70-1.50.
Described hydrogenchloride water absorbs by multistage packing tower and absorbs, and makes technical hydrochloric acid.Temperature arrives 100～140 ℃, and reaction finishes substantially.
Described isolated sodium-chlor can directly be got back to still pot and add as raw material.
The inventive method has solved the discharging that dense sulfur waste acid and pollution factor are hanged down in a large amount of high pollutions in the industrial production at all, reduce the discharging that a large amount of suspended substances exist a large amount of COD, BOD pollutant effluents that contains after handling, avoided using in original treatment process the genetic defects of lime neutralizing treatment, renewable resource such as use lime, iron powder, activated sludge, clorox, PAM have been avoided, can reduce the generation of a large amount of secondary pollutants, reduce the discharging of industrial gaseous waste; Investment and needed raw-material fund have been reduced simultaneously because of the needed a large amount of equipment of Industrial Wastewater Treatment.
The inventive method technology is simple, easy to operate, avoided the realistic problem of biochemical treatment of industrial wastewater difficulty, solved the problem of the high COD of sewage after the traditional industry wastewater treatment, handle waste water by the inventive method and can create a large amount of economic worths, hydrochloric acid after the recovery and sodium sulfate etc. can be used as industrial goods and use.
The inventive method is handled waste water, make waste water not useless, turn waste into wealth, can recycle, both reduced the discharging of waste water, reduce pressure to environmental protection, can create a large amount of economic benefits again, produce a large amount of social benefits, accomplish the resource circulation utilization, for handling the very good treatment process of environmental protection and economy of low-concentration industrial waste water.
Description of drawings
Fig. 1 is the technological process block-diagram of the inventive method.
Embodiment
Various wastewater mother liquors are mixed the back survey acidity, require greater than 5% above acidity of sulfuric acid, preferably high more good more, otherwise can cause reclaiming difficulty, mother liquor is stored in 500M
3Vat in, carry out the batch homogenizing, mixed mother liquor water is got in the concentration systems concentrated then, carry out decolorization filtering before also can preferably concentrating so that remove a part of impurity, avoid the obstruction of pipeline and vaporizer in the concentration systems; Being concentrated to acidity is about 30～75%, at this moment has a large amount of impurity and separates out, and the after-filtration of lowering the temperature is slightly removed the impurity of separating out.
Waste water behind the concentrating and impurity removing is put in the still pot, adds the sodium-chlor for preparing, sodium-chlor and sulfuric acid mol ratio are 0.70～1.50, closed reactor heats up then, starts vacuum, carry out hydrogenchloride and reclaim, reclaim with multistage packing tower absorption, temperature arrives 100～140 ℃ of basic end of reaction.After hydrogen chloride absorption finishes, carry out stdn (30%), squeeze into the salt acid storage tank.After steaming hydrogenchloride, cooling adds the liquid caustic soda neutralization, and pH value neutralizes 6.0～8.5, and this process can produce a large amount of neutralization heat, and temperature of cooling water is higher, can be used for the preheating of concentration systems, and neutralization is finished, and according to the amount of the salt of temperature and the inside, adds an amount of water; Saturated brine after also can filtering with crystallization is added, make all fully dissolvings of salt of the inside, filter, remove a part of impurity earlier, be put into then in the Decolouring pot, add gac and decolour, remove the impurity that is dissolved in the water, filter, a part can directly be utilized, and another part is put into crystallizing pan, carry out crystallisation by cooling, stir, the mother liquor water after crystallization is filtered can be got back in the system, as adding water, an xln part can directly be utilized, a part is made with extra care, and the sodium-chlor after making with extra care is got back to system, packs after the dried over sodium sulfate.
Claims (5)
1. a method for recycling high polluted low concentration waste acid will contain vitriolic waste water and concentrate, and add sodium-chlor behind the filtering and impurity removing and react, the hydrogenchloride that reaction generates, water absorbs, and makes technical hydrochloric acid; The tart mixed salt that reaction generates is after neutralization, and after the removal of impurities decolouring, a part directly can be utilized; The mixed salt of another part is isolated sodium-chlor and sodium sulfate after making with extra care.
2. method for recycling high polluted low concentration waste acid according to claim 1 is characterized in that: described vitriolated waste water concentrates by the multiple-effect concentration systems, and concentrating back acidity is 30～75%.
3. method for recycling high polluted low concentration waste acid according to claim 1, it is characterized in that: sulfuric acid reaction carries out in still pot in described sodium-chlor and the waste water, and the add-on of sodium-chlor is: the vitriolic mol ratio is in sodium-chlor and the waste water: 0.70-1.50.
4. method for recycling high polluted low concentration waste acid according to claim 1 is characterized in that: described hydrogenchloride water absorbs and adopts multistage packing tower absorption process, makes technical hydrochloric acid.
5. method for recycling high polluted low concentration waste acid according to claim 1 is characterized in that: described isolated sodium-chlor can directly be got back to system and add as raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100496587A CN100337906C (en) | 2006-03-01 | 2006-03-01 | High-pollution low-concentration waste acid recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100496587A CN100337906C (en) | 2006-03-01 | 2006-03-01 | High-pollution low-concentration waste acid recycling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1821055A true CN1821055A (en) | 2006-08-23 |
| CN100337906C CN100337906C (en) | 2007-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100496587A Active CN100337906C (en) | 2006-03-01 | 2006-03-01 | High-pollution low-concentration waste acid recycling method |
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| Country | Link |
|---|---|
| CN (1) | CN100337906C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497213C (en) * | 2007-06-11 | 2009-06-10 | 浙江闰土股份有限公司 | High-pollution low-concentration waste acid recycling method |
| CN103172195A (en) * | 2012-12-28 | 2013-06-26 | 江苏三木化工股份有限公司 | Wastewater resource reutilization method in organic silicon production |
| CN105540545A (en) * | 2016-02-26 | 2016-05-04 | 浙江奇彩环境科技股份有限公司 | Recycling treatment method for waste sodium chloride and waste acid |
| CN105731708A (en) * | 2016-02-26 | 2016-07-06 | 浙江奇彩环境科技股份有限公司 | Resourceful treatment method for discarded sodium sulfates and waste acids |
| CN107117632A (en) * | 2017-04-28 | 2017-09-01 | 湘潭大学 | A kind of comprehensive utilization process of lead-acid accumulator Waste Sulfuric Acid |
| CN110436486A (en) * | 2019-08-19 | 2019-11-12 | 广东新生环保科技股份有限公司 | A kind of refuse battery waste acidity recovery production line and its technique |
| CN111232927A (en) * | 2020-03-09 | 2020-06-05 | 广东水清环保科技有限公司 | Waste acid recovery method and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63236416A (en) * | 1987-03-25 | 1988-10-03 | Mitsubishi Electric Corp | Encoding/decoding method |
| AU1796099A (en) * | 1998-03-31 | 1999-10-18 | Waterworks International, Inc. | Waste acid recovery |
-
2006
- 2006-03-01 CN CNB2006100496587A patent/CN100337906C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497213C (en) * | 2007-06-11 | 2009-06-10 | 浙江闰土股份有限公司 | High-pollution low-concentration waste acid recycling method |
| CN103172195A (en) * | 2012-12-28 | 2013-06-26 | 江苏三木化工股份有限公司 | Wastewater resource reutilization method in organic silicon production |
| CN105540545A (en) * | 2016-02-26 | 2016-05-04 | 浙江奇彩环境科技股份有限公司 | Recycling treatment method for waste sodium chloride and waste acid |
| CN105731708A (en) * | 2016-02-26 | 2016-07-06 | 浙江奇彩环境科技股份有限公司 | Resourceful treatment method for discarded sodium sulfates and waste acids |
| CN107117632A (en) * | 2017-04-28 | 2017-09-01 | 湘潭大学 | A kind of comprehensive utilization process of lead-acid accumulator Waste Sulfuric Acid |
| CN110436486A (en) * | 2019-08-19 | 2019-11-12 | 广东新生环保科技股份有限公司 | A kind of refuse battery waste acidity recovery production line and its technique |
| CN111232927A (en) * | 2020-03-09 | 2020-06-05 | 广东水清环保科技有限公司 | Waste acid recovery method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100337906C (en) | 2007-09-19 |
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| Date | Code | Title | Description |
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| 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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Jiacheng Chemical Co., Ltd. Assignor: Zhejiang Runtu Co., Ltd. Contract fulfillment period: 2009.12.10 to 2014.12.9 contract change Contract record no.: 2010330000119 Denomination of invention: Method for recycling high polluted low concentration waste acid Granted publication date: 20070919 License type: Exclusive license Record date: 2010.1.22 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.12.10 TO 2014.12.9; CHANGE OF CONTRACT Name of requester: ZHEJIANG JIACHENG CHEMICAL CO., LTD. Effective date: 20100122 |