CN100389078C - Regeneration treatment method of steel sheet pickling waste liquor - Google Patents
Regeneration treatment method of steel sheet pickling waste liquor Download PDFInfo
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- CN100389078C CN100389078C CNB2006100235799A CN200610023579A CN100389078C CN 100389078 C CN100389078 C CN 100389078C CN B2006100235799 A CNB2006100235799 A CN B2006100235799A CN 200610023579 A CN200610023579 A CN 200610023579A CN 100389078 C CN100389078 C CN 100389078C
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- pickling waste
- steel sheet
- steel plate
- solution
- waste liquor
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Abstract
The present invention relates to a waste acid processing method, particularly to a regeneration processing method of steel sheet pickling waste liquid. The present invention solves the technical problems of complicated process, high cost and discharged pollution of the existing steel plate pickling waste liquid methods. The present invention has the technical scheme that the method can process the steel plate pickling waste water of a ferrous chloride water solution with 4 to 5% free HCl. The present invention comprises the processing procedures that metal iron is used for absorbing (compounding) the free HCl in the steel plate pickling waste water, so the ferrous chloride solution containing a small amount of free HCl (namely the steel plate pickling waste water) is converted into a single ferrous chloride water solution. In order to accelerate reaction speed, the steel plate pickling waste water needs to be heated, reaction temperature is 70 to 90 DEG C, and ferrous chloride crystals and water are separated via concentrating and separating the solution by a distillation method. The present invention is mainly used for the processing and the regeneration use of the steel plate pickling waste water.
Description
Technical field:
The present invention relates to a kind of spent acid treatment process, particularly a kind of regeneration treating method of steel sheet pickling waste liquor.
Background technology:
Useless (salt) acid solution that produces in the steel plate acid-washing technology pollutes the environment because of containing a certain amount of hydrogenchloride (generally containing free HCl4 ~ 6%), so do not allow directly to efflux.Traditional disposal way is to adopt slaked lime (alkaline material) and spent acid solution to stir neutralization, press filtration, and filtrate can efflux, solid residue calcium chloride (CaCl
2) then to transport outward the outer suburbs and bury, the flow process of this method and equipment used, behaviour are ashamed numerous and diverse, expense is also higher, thereby continue to use at present own few.Enterprise large-scale and in the money is introduction of foreign technology (being Shandong nanofarad-spray roasting now) mostly, but adopt this method because of build and working cost too high, fail to popularize at medium-sized and small enterprises.Medium-sized and small enterprises are many with outward transport, transfer to professional unit and focus on; Some producer tries to explore to invest less facility these spent acid by oneself on the spot, the method that adopts has extraction process, composite distillation method, stepwise distillation method, but the waste acid treatment of these methods is not thorough---the part distillation phlegma that effluxes still contains certain amount of H Cl, add that a certain amount of alkali is neutralized or the water mixing dilution after could standard discharge, so effect is not felt quite pleased.For example the Chinese patent electricity please disclose a kind of ferrous contained hydrochloric acid waste water reclaiming treatment technology by CNO1117756.X, promptly be to adopt the distillatory method to handle spent acid, though treatment process is fairly simple, still exist the distillation phlegma still to contain the shortcoming that certain amount of H Cl needs are further handled.
Summary of the invention:
The object of the invention provides the regeneration treating method that a kind of spent acid is handled the recycling steel sheet pickling waste liquor of final product, solves complex process, the cost height that has the steel sheet pickling waste liquor treatment process now and exist, the technical problem that the pollution of effluxing is arranged.Seek that both economy, environment protecting are good, the solution of the comprehensive regulation of resource recovery.
Technical scheme of the present invention is: the steel sheet pickling waste liquor that the present invention handles: for containing the ferrous chloride aqueous solution of 4 ~ 5% free state HCl, treatment step is: with the free state HCl in metallic iron absorption (chemical combination) steel sheet pickling waste liquor, make the solution of ferrous chloride (being steel sheet pickling waste liquor) that contains small-amount free attitude HCl become single ferrous chloride aqueous solution, be fast reaction speed, need steel sheet pickling waste liquor is heated, temperature of reaction is 70-90 ℃, with distillation method solution concentration is separated out the iron protochloride crystallization again and water sepn is come out.
The invention has the beneficial effects as follows: nanofarad compares that technology is simple now, process simplification, investment compress significantly with existing Shandong; With treatment processs such as extraction, composite distillation, stage evaporation specific investment is saved mutually, nothing effluxes pollution worry, complete process.Spent acid includes the former iron that goes out of use, hydrogenchloride and moisture and obtains regeneration and reclaim, and realizes waste resource regeneration, and it is multiplexing that water returns the pickling workshop,, comes into the market to sell as regular product through iron protochloride that evaporation concentration is separated out after the finished product processing.
Embodiment:
Embodiment 1,
The first step absorbs the free state HCl in the steel sheet pickling waste liquor
The steel sheet pickling waste liquor that the steel sheet pickling waste liquor storage tank is drawn, enter heater heats and improve temperature (reaching 80 ℃), enter base cone cylinder shape absorption cell (the built-in completely useless side cut iron charge of groove) from the bottom, the free state HCl in the hot steel sheet pickling waste liquor and iron vigorous reaction (2HCl+Fe → FeCl
2+ H
2) chemical combination generation FeCl
2, finish reaction with enough residence times, go to zero up to the content of HCl.Solution of ferrous chloride is drawn from the absorption cell top, makes the part solid impurity settlement separate through settling bath again, and solution of ferrous chloride overflows through settling bath overflow weir suitable for reading that to enter down operation distillate storage tank temporary.
Second step was isolated iron protochloride crystallization and water from solution of ferrous chloride
With distillation method solution of ferrous chloride is concentrated, separate out the iron protochloride crystallization and be separated, the water vapor that distills out returns the pickling workshop and uses for complex acid, flushing through being condensed into water.
Annotate: iron protochloride is the desirable feedstock that a kind of comparatively ideal sewage-treating agent and making efficient water-purifying agent, molysite, mordant, especially wet method are made senior transparent ferric oxide series pigments, senior magnetic recording material.
Embodiment 2, and the Heating temperature of well heater is 70 ℃, and all the other are identical with embodiment 1.
Embodiment 3, and the Heating temperature of well heater is 90 ℃, and all the other are identical with embodiment 1.
Economic benefit of the present invention is adjusted as follows: 1) native system year is handled 1m
3The steel sheet pickling waste liquor investment cost is 150 yuan, (Shandong nanofarad be 1400 yuan) on year-on-year basis now; 2) both administered the pollution of steel sheet pickling waste liquor, and also reclaimed: it is multiplexing for complex acid that (1) moisture content returns the pickling workshop, need not replenish new water; (2) institute's iron content is divided and small-amount free HCl, makes four water iron protochloride (FeCl with market competitiveness
24H
2O) crystallization; (3) produce 7,000m with year
3The cold rolling mill of abraum salt acid is an example, builds the investment of this treatment system and needs 1,500,000 yuan approximately, and building up the back one of putting into operation is to save over one hundred ten thousand yuan of former steel plate spent pickle liquor handlings; The 2nd, the market sale of gained renewable resource (iron protochloride crystallization) income, the deduction systematic running cost is got a profit nearly 500,000 yuan, and two gross earningss are nearly 2,000,000, can recoup capital outlay then.
Claims (1)
1. the regeneration treating method of a steel sheet pickling waste liquor, it is characterized in that: treatment process comprises the steps:
A, the steel sheet pickling waste liquor that the steel sheet pickling waste liquor storage tank is drawn, enter heater heats, enter base cone cylinder shape absorption cell from the bottom, the built-in completely useless side cut iron charge of groove, temperature of reaction is 70-90 ℃, fully reaction post chlorization ferrous iron solution is drawn from the absorption cell top, makes the part solid impurity settlement separate through settling bath again, and solution of ferrous chloride overflows through settling bath overflow weir suitable for reading and enters down operation distillate storage tank and keep in;
B, solution of ferrous chloride is concentrated with distillation method, the iron protochloride crystallization of separating out is separated, and the water vapor that distills out returns the pickling workshop and uses for complex acid, flushing through being condensed into water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100235799A CN100389078C (en) | 2006-01-24 | 2006-01-24 | Regeneration treatment method of steel sheet pickling waste liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100235799A CN100389078C (en) | 2006-01-24 | 2006-01-24 | Regeneration treatment method of steel sheet pickling waste liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1803656A CN1803656A (en) | 2006-07-19 |
| CN100389078C true CN100389078C (en) | 2008-05-21 |
Family
ID=36865835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100235799A Expired - Fee Related CN100389078C (en) | 2006-01-24 | 2006-01-24 | Regeneration treatment method of steel sheet pickling waste liquor |
Country Status (1)
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| CN (1) | CN100389078C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891259B (en) * | 2009-05-20 | 2012-10-10 | 北京紫光英力化工技术有限公司 | New process for recycling pickling waste liquid |
| CN102079595B (en) * | 2010-12-16 | 2012-07-18 | 陆伯新 | Method for treating waste hydrochloric acid containing lead, zinc and ferrum |
| CN103014737A (en) * | 2011-09-22 | 2013-04-03 | 河南红日锂能源科技有限公司 | Cold-rolled steel pickling waste acid treatment method |
| CN104495953A (en) * | 2014-12-31 | 2015-04-08 | 天津市职业大学 | Process for treating industrial waste hydrochloric acid in recycling way through salt fractionation method |
| WO2018090167A1 (en) * | 2016-11-15 | 2018-05-24 | 江苏双能太阳能有限公司 | Waste acid treatment process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108552A (en) * | 1985-11-27 | 1987-06-03 | 北京大学 | The treatment process of chlorhydric acid pickling waste containing iron |
| CN1072219A (en) * | 1991-11-14 | 1993-05-19 | 清华大学 | The treatment technology of cold rolling chlorohydric acid pickling spent acid |
| CN1164579A (en) * | 1996-05-05 | 1997-11-12 | 大连市金州区环境监测站 | Process for treatment of sulfuric acid pickling waste liquor for pickling steel |
| JPH1147795A (en) * | 1997-07-31 | 1999-02-23 | Nittetsu Mining Co Ltd | Treatment of sulfuric acid pickle liquor of special steel |
| CN2557534Y (en) * | 2002-09-06 | 2003-06-25 | 哈尔滨天业环保有限公司 | Hydrochloric spent pickle liquor treatment device |
-
2006
- 2006-01-24 CN CNB2006100235799A patent/CN100389078C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108552A (en) * | 1985-11-27 | 1987-06-03 | 北京大学 | The treatment process of chlorhydric acid pickling waste containing iron |
| CN1072219A (en) * | 1991-11-14 | 1993-05-19 | 清华大学 | The treatment technology of cold rolling chlorohydric acid pickling spent acid |
| CN1164579A (en) * | 1996-05-05 | 1997-11-12 | 大连市金州区环境监测站 | Process for treatment of sulfuric acid pickling waste liquor for pickling steel |
| JPH1147795A (en) * | 1997-07-31 | 1999-02-23 | Nittetsu Mining Co Ltd | Treatment of sulfuric acid pickle liquor of special steel |
| CN2557534Y (en) * | 2002-09-06 | 2003-06-25 | 哈尔滨天业环保有限公司 | Hydrochloric spent pickle liquor treatment device |
Non-Patent Citations (2)
| Title |
|---|
| 钢板酸洗废液制备高纯氧化铁的研究. 何明兴，何安西，陈秀云，徐南南.钢铁钒钛，第21卷第4期. 2000 |
| 钢板酸洗废液制备高纯氧化铁的研究. 何明兴，何安西，陈秀云，徐南南.钢铁钒钛，第21卷第4期. 2000 * |
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|---|---|
| CN1803656A (en) | 2006-07-19 |
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Granted publication date: 20080521 Termination date: 20110124 |