CN1557739A - System for treating industrial sulphuric acid washing waste liquid - Google Patents
System for treating industrial sulphuric acid washing waste liquid Download PDFInfo
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- CN1557739A CN1557739A CNA2004100017672A CN200410001767A CN1557739A CN 1557739 A CN1557739 A CN 1557739A CN A2004100017672 A CNA2004100017672 A CN A2004100017672A CN 200410001767 A CN200410001767 A CN 200410001767A CN 1557739 A CN1557739 A CN 1557739A
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- Prior art keywords
- waste liquid
- ferrous sulfate
- sulphuric acid
- industrial sulphuric
- sulfuric acid
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Abstract
The industrial pickling waste sulfuric acid solution treating system has a waste iron scrap reacting bed to raise the concentration of ferrous sulfate during heating, and the waste solution is then added with acid, cooled, crystallized and separated. The system is simple and low in power consumption, and can produce ferrous sulfate crystal.
Description
Affiliated technical field
The present invention relates to a kind of industrial sulphuric acid spent pickle liquor governing system, it belongs to the environmental engineering class, specifically is a kind of wastewater treating technology class.
Background technology
The industrial sulphuric acid spent pickle liquor is administered and is adopted iron vitriol salt method to carry out comprehensive regulation recycling method usually.Iron vitriol salt method is divided into vacuum cooling crystallization process and direct method of cooling again.
The vacuum cooling crystallization process is that waste liquid is carried out adiabatic evaporation at vacuum state, makes in the waste liquid sulfuric acid concentration increase the ferrous sulfate crystallization and separates out.Its shortcoming is that equipment complexity, cost height and energy consumption are big.
Directly method of cooling is divided into air-cooling, natural water method of cooling and crystallisation by cooling method again.Air-cooling, natural water method of cooling are to mix back waste liquid and cooling air or the reverse heat exchange of natural water, the purpose that reaches the cooling waste liquid and the ferrous sulfate crystallization is separated out with adding the vitriol oil.Its shortcoming is that productivity is low, and is subjected to the restriction of season, relative temperature and humidity.Adding sour crystallisation by cooling method is to improve 80 ℃ of waste liquid temperatures earlier, and the method for adding the vitriol oil improves waste liquid acidity, and cools off with refrigerating fulid, to reduce the solubleness of ferrous sulfate, the ferrous sulfate crystallization is separated out.Its shortcoming is the concentration limit that is subjected to the waste liquid ferrous sulfate, and ferrous sulfate yields poorly, and reclaims not thoroughly, and it is high relatively to improve the temperature energy consumption.
A kind of industrial sulphuric acid spent pickle liquor of the present invention governing system increases the waste iron filing reaction bed with waste liquid in heating, with the concentration of ferrous sulfate in the raising waste liquid, and then add acid cooling, Crystallization Separation.Can overcome above-mentioned technical deficiency part, under the low relatively situation of the simple energy consumption of equipment, make the more ferrous sulfate crystal of waste liquid output.
In order to achieve the above object, embodiment of the present invention are as follows:
Sulfuric acid pickling waste liquid is pumped into by acid proof pump 2 by storage tank 1 and carries dense pond 4, and heater via 5 is heated to 60 ℃ in carrying dense pond 4, can generate more ferrous sulfate proposing 3 reactions of the 4 li waste liquids in dense pond and iron filings reaction bed.Reacted waste liquid enters crystallizing pond 6, with the vitriol oil adding crystallizing pond 6 of concentrated sulfuric acid groove 7, improves the acidity of waste liquid.Refrigerating fulid enters water cooler 8 and carries out heat exchange with waste liquid, and waste liquid is cooled to 10 ℃, and the ferrous sulfate crystallization is separated out.Give solid-liquid separator 10 with pump 9 extractions and separate, ferrous sulfate crystal (iron vitriol) is told the ferrous sulfate crystal storage tank 11 of packing into sell as product, the regeneration acid solution after the separation is sent into regenerating acid storage tank 12, can be back to production.
Fig. 1 is a process flow diagram of the present invention.
Among the figure 1, storage tank 2, acid proof pump 3, iron filings reaction bed 4, carry dense pond 5, well heater 6, crystallizing pond 7, sulfuric acid tank 8, water cooler 11, pump 10, solid-liquid separator 11, ferrous sulfate crystal storage tank 12, regenerating acid storage tank
Example of the present invention is: certain pipe mill produces colddrawing seamless pipe, discharges 50 tons of high density pickling waste water every day.Principal pollutant are in the waste water: sulfuric acid 9% (5～13%), ferrous sulfate 20% (17～23%).Adopt the present invention, can produce 10 tons in ferrous sulfate crystal every day, 4.5 tons of reclaiming acid.
You following characteristics of the present invention:
1, adopts bed of iron filings, improve waste liquid Zhong ferrous sulfate content and concentration, reduce useless The liquid heating-up temperature, energy efficient.
2, equipment is simple, and is easy to operate.
3, ferrous sulfate crystal rate of recovery height in the waste liquid.
4, total system does not have discharge of wastewater.
5, the sulfuric acid in the waste liquid can all obtain reuse.
Claims (2)
1, a kind of industrial sulphuric acid spent pickle liquor governing system is characterized in that sulfuric acid pickling waste liquid quickens to propose dense reaction with iron filings reaction bed 3 carrying 4 li in dense pond, can generate more ferrous sulfate.
2, according to claim 1, it is characterized in that the sulfuric acid pickling waste liquid that enters the iron filings reaction bed should be heated to 60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100017672A CN1557739A (en) | 2004-01-30 | 2004-01-30 | System for treating industrial sulphuric acid washing waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100017672A CN1557739A (en) | 2004-01-30 | 2004-01-30 | System for treating industrial sulphuric acid washing waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1557739A true CN1557739A (en) | 2004-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100017672A Pending CN1557739A (en) | 2004-01-30 | 2004-01-30 | System for treating industrial sulphuric acid washing waste liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN1557739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865847A (en) * | 2017-04-19 | 2017-06-20 | 广东赛威赢环境技术工程有限公司 | A kind of high content acid wastewater recycling processing method |
| CN111995144A (en) * | 2020-07-09 | 2020-11-27 | 界首市南都华宇电源有限公司 | Sewage treatment system is used in lead accumulator production |
-
2004
- 2004-01-30 CN CNA2004100017672A patent/CN1557739A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865847A (en) * | 2017-04-19 | 2017-06-20 | 广东赛威赢环境技术工程有限公司 | A kind of high content acid wastewater recycling processing method |
| CN111995144A (en) * | 2020-07-09 | 2020-11-27 | 界首市南都华宇电源有限公司 | Sewage treatment system is used in lead accumulator production |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |