CN1951806A - Low-density washing waste water disposal method in carbon white production process - Google Patents
Low-density washing waste water disposal method in carbon white production process Download PDFInfo
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- CN1951806A CN1951806A CN 200610102182 CN200610102182A CN1951806A CN 1951806 A CN1951806 A CN 1951806A CN 200610102182 CN200610102182 CN 200610102182 CN 200610102182 A CN200610102182 A CN 200610102182A CN 1951806 A CN1951806 A CN 1951806A
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Abstract
The invention discloses a disposing method of low-density washing waste water in the white carbon black manufacturing course, which is characterized by the following: adopting closed-circuit circulating technology to wash; condensing step by step; making the sodium sulphate density in the washing waste water at 6%; stopping circulating; entering into recycling segment of sodium sulphate; blending with mother liquid from filter press; evaporating; condensing; crystallizing to recycle the by-product of sodium sulphate.
Description
Technical field
The present invention relates to treatment of waste water from washing in the carbon white production process, specifically is lower concentration treatment of waste water from washing in a kind of carbon white production process.
Background technology
At present, the production method of white carbon black mainly is the vapor phase process and the precipitator method both at home and abroad.And the domestic main use sulfuric acid precipitation method of the precipitator method.It is a raw material to steep colored alkali, with sulfuric acid acidation, generate silicic acid, decomposes and makes precipitated silica.The sodium sulfate mother liquor that produces in the reaction slurry pressure-filtering process (being high-concentration waste water) adopts traditional quadruple effect following current vacuum evaporation technology technology reclaim(ed) sulfuric acid sodium as byproduct usually, and a large amount of low concentration wastewaters (concentration is about about 1%) that produce in the washing process do not have the ideal treatment process at present, some producers are in order to escape the inspection of environmental administration, a large amount of clear water dilution commonly used, directly discharging, the processing that does not fundamentally solve waste water.
Summary of the invention
The lower concentration washes does not have the ideal treatment process in the carbon white production process in order to solve in the prior art in the present invention, and then directly discharging causes environmental pollution problems, and a kind of lower concentration treatment of waste water from washing little, non-environmental-pollution of investing is provided.
The present invention adopts following technical scheme to realize: low concentration wastewater treatment process in the carbon white production process the steps include:
1) first white carbon black coarse fodder of production process washs with clear water, washes according to the size of sodium sulfate concentration put into No. 1 pond, No. 2 ponds successively, to the n-1 pond, n pond (n 〉=2), wherein n pond sodium sulfate concentration＜n-1 pond sodium sulfate concentration＜...＜No. 2 pond sodium sulfate concentration＜No. 1 pond sodium sulfate concentration＜6%;
2) the second batch of white carbon black coarse fodder washs with washes in No. 1 pond earlier, on-line analysis monitoring sodium sulfate concentration reaches in the mother liquor pond that enters sodium sulfate concentration 6% after 6%, No. 1 the pond empties, then with washes washing white carbon black coarse fodder in No. 2 ponds, sodium sulfate concentration reaches in No. 1 pond behind the sodium sulfate concentration in the on-line analysis monitoring washes, waste water in No. 2 ponds is entered the pond No. 1, No. 2 the pond empties, washes washing white carbon black coarse fodder in follow-up each pond, before sodium sulfate concentration reaches in the on-line analysis monitoring washes in number pond behind the sodium sulfate concentration, waste water in this pond is entered preceding number pond, this pond empties, washes washing white carbon black coarse fodder to the n pond, sodium sulfate concentration reaches in the n-1 pond behind the sodium sulfate concentration in the on-line analysis monitoring washes, and the waste water in the n pond is entered the n-1 pond, and the n pond empties, last clear water washing white carbon black coarse fodder, washes enters the n pond;
3) each batch white carbon black coarse fodder washing process is identical with second batch after,
4) sodium sulfate concentration reaches that 6% washes evaporates, concentrates, crystallization reclaim(ed) sulfuric acid sodium byproduct.
Produce two strands of waste water in the precipitated silica production process, one waste water is the pressure filter mother liquor, and sodium sulfate concentration is more than 6%, and this strand waste water can directly be sent into recycle section; Another strand waste water is white carbon black coarse fodder washes, sodium sulfate concentration about about 1%.Treatment process of the present invention adopts the close circulation technology washing to this strand waste water, carry densely step by step, sodium sulfate concentration reaches 6% in washes, and circulation stops, enter sodium sulfate recycle section and pressure filter mother liquor then and mix, evaporate, concentrate, crystallization reclaim(ed) sulfuric acid sodium byproduct.
The present invention compared with prior art waste water has realized " zero release " substantially, and non-environmental-pollution makes the vitriol oil precipitator method technology of white carbon black change process for cleanly preparing into.Method investment of the present invention is little, is easy to promote.
Embodiment
In conjunction with the accompanying drawings the specific embodiment of the present invention is described further, embodiment is that explanation is of the present invention, rather than it is imposed any restrictions.
First white carbon black coarse fodder washs with clear water, and with the difference of washes according to sodium sulfate concentration, it is stand-by to put into four ponds respectively, the sodium sulfate concentration in each pond is respectively: No. 1 pond 4～5%, 2～3%, No. 4 ponds 0～2%, 3～4%, No. 3 ponds, No. 2 ponds.
When second batch of white carbon black coarse fodder washs, be that 4～5% waste water washs at first with contains sodium sulfate concentration in No. 1 pond, after sodium sulfate concentration reaches 6% in the on-line analysis monitoring washes, the waste water in No. 1 pond is entered in the mother liquor pond of sodium sulfate concentration 6%, No. 1 the pond empties; Be that 3～4% waste water washs the white carbon black coarse fodder with contains sodium sulfate concentration in No. 2 ponds again, after sodium sulfate concentration reaches 4～5% in the on-line analysis monitoring washes, the waste water in No. 2 ponds entered the pond No. 1, No. 2 the pond empties; Be that 2～3% waste water washs the white carbon black coarse fodder with contains sodium sulfate concentration in No. 3 ponds again, after sodium sulfate concentration reaches 3～4% in the on-line analysis monitoring washes, the waste water in No. 3 ponds entered the pond No. 2, No. 3 the pond empties; Be that 0～2% waste water washs the white carbon black coarse fodder with contains sodium sulfate concentration in No. 4 ponds again, after sodium sulfate concentration reaches 2～3% in the on-line analysis monitoring washes, the waste water in No. 4 ponds entered the pond No. 3, No. 4 the pond empties; With clear water the white carbon black coarse fodder is washed, washes enters the pond No. 4 again.
Each batch white carbon black coarse fodder washing process is identical with second batch of white carbon black coarse fodder washing process afterwards.Washes is closed cycle in system, carries densely step by step, after sodium sulfate concentration reaches 6% in waste water, sends into sodium sulfate recycle section and pressure filter mother liquor and mixes, and evaporates, concentrates, crystallization, reclaim(ed) sulfuric acid sodium.
Claims (2)
1, low concentration wastewater treatment process in a kind of carbon white production process the steps include:
1) first white carbon black coarse fodder of production process washs with clear water, washes according to the size of sodium sulfate concentration put into No. 1 pond, No. 2 ponds successively, to the n-1 pond, n pond (n 〉=2), wherein n pond sodium sulfate concentration＜n-1 pond sodium sulfate concentration＜...＜No. 2 pond sodium sulfate concentration＜No. 1 pond sodium sulfate concentration＜6%;
2) the second batch of white carbon black coarse fodder washs with washes in No. 1 pond earlier, on-line analysis monitoring sodium sulfate concentration reaches in the mother liquor pond that enters sodium sulfate concentration 6% after 6%, No. 1 the pond empties, then with washes washing white carbon black coarse fodder in No. 2 ponds, sodium sulfate concentration reaches in No. 1 pond behind the sodium sulfate concentration in the on-line analysis monitoring washes, waste water in No. 2 ponds is entered the pond No. 1, No. 2 the pond empties, washes washing white carbon black coarse fodder in follow-up each pond, before sodium sulfate concentration reaches in the on-line analysis monitoring washes in number pond behind the sodium sulfate concentration, waste water in this pond is entered preceding number pond, this pond empties, washes washing white carbon black coarse fodder to the n pond, sodium sulfate concentration reaches in the n-1 pond behind the sodium sulfate concentration in the on-line analysis monitoring washes, and the waste water in the n pond is entered the n-1 pond, and the n pond empties, last clear water washing white carbon black coarse fodder, washes enters the n pond;
3) each batch white carbon black coarse fodder washing process is identical with second batch after;
4) sodium sulfate concentration reaches that 6% washes evaporates, concentrates, crystallization reclaim(ed) sulfuric acid sodium byproduct.
2, lower concentration treatment of waste water from washing in the carbon white production process according to claim 1 the steps include:
1) first white carbon black coarse fodder of production process washs with clear water, washes is put into No. 1 pond, No. 2 ponds, No. 3 ponds, No. 4 ponds successively according to the size of sodium sulfate concentration, wherein No. 1 pond sodium sulfate concentration is 4～5%, No. 2 the pond sodium sulfate concentration is 3～4%, No. 3 pond sodium sulfate concentrations are that 2～3%, No. 4 pond sodium sulfate concentrations are 0～2%;
2) the second batch of white carbon black coarse fodder is that 4～5% waste water washs with contains sodium sulfate concentration in No. 1 pond earlier, after sodium sulfate concentration reaches 6% in the on-line analysis monitoring washes, waste water in No. 1 pond is entered in the mother liquor pond of sodium sulfate concentration 6%, and No. 1 the pond empties; Be that 3～4% waste water washs the white carbon black coarse fodder with contains sodium sulfate concentration in No. 2 ponds again, after sodium sulfate concentration reaches 4～5% in the on-line analysis monitoring washes, the waste water in No. 2 ponds entered the pond No. 1, No. 2 the pond empties; Be that 2～3% waste water washs the white carbon black coarse fodder with contains sodium sulfate concentration in No. 3 ponds again, after sodium sulfate concentration reaches 3～4% in the on-line analysis monitoring washes, the waste water in No. 3 ponds entered the pond No. 2, No. 3 the pond empties; Be that 0～2% waste water washs the white carbon black coarse fodder with contains sodium sulfate concentration in No. 4 ponds again, after sodium sulfate concentration reaches 2～3% in the on-line analysis monitoring washes, the waste water in No. 4 ponds entered the pond No. 3, No. 4 the pond empties; With clear water the white carbon black coarse fodder is washed at last, washes enters the pond No. 4;
3) each batch white carbon black coarse fodder washing process is identical with second batch after;
4) sodium sulfate concentration reaches that 6% washes evaporates, concentrates, crystallization reclaim(ed) sulfuric acid sodium byproduct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610102182 CN1951806A (en) | 2006-11-22 | 2006-11-22 | Low-density washing waste water disposal method in carbon white production process |
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| CN 200610102182 CN1951806A (en) | 2006-11-22 | 2006-11-22 | Low-density washing waste water disposal method in carbon white production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412514B (en) * | 2008-11-18 | 2012-09-05 | 湖北兴发化工集团股份有限公司 | Technique for preparing white carbon black by phosphoric acid precipitation and directly coproducing sodium phosphate |
| CN103539281A (en) * | 2013-02-05 | 2014-01-29 | 金能科技股份有限公司 | White carbon black production wastewater treatment technology |
| CN103819037A (en) * | 2014-02-27 | 2014-05-28 | 南昌航空大学 | Comprehensive utilization method for recycling white carbon black waste water by precipitation method |
| CN113120924A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Recovery method of alkali activator for preparing activated carbon |
-
2006
- 2006-11-22 CN CN 200610102182 patent/CN1951806A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412514B (en) * | 2008-11-18 | 2012-09-05 | 湖北兴发化工集团股份有限公司 | Technique for preparing white carbon black by phosphoric acid precipitation and directly coproducing sodium phosphate |
| CN103539281A (en) * | 2013-02-05 | 2014-01-29 | 金能科技股份有限公司 | White carbon black production wastewater treatment technology |
| CN103539281B (en) * | 2013-02-05 | 2015-09-23 | 金能科技股份有限公司 | White carbon black production wastewater treatment technology |
| CN103819037A (en) * | 2014-02-27 | 2014-05-28 | 南昌航空大学 | Comprehensive utilization method for recycling white carbon black waste water by precipitation method |
| CN113120924A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Recovery method of alkali activator for preparing activated carbon |
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