CN103539281A - White carbon black production wastewater treatment technology - Google Patents
White carbon black production wastewater treatment technology Download PDFInfo
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- CN103539281A CN103539281A CN201310044994.2A CN201310044994A CN103539281A CN 103539281 A CN103539281 A CN 103539281A CN 201310044994 A CN201310044994 A CN 201310044994A CN 103539281 A CN103539281 A CN 103539281A
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Abstract
The invention belongs to the technical field of chemical wastewater treatment, and in particular relates to a white carbon black production wastewater treatment technology. The technology comprises the steps of pretreating white carbon black production wastewater so that the water quality of the treated wastewater can reach the water quality requirement of a membrane treatment system; carrying out membrane filtration so that enriching sodium sulfate in the wastewater is enriched at one side of a membrane until the content of sodium sulfate is not less than 10% and the produced water at the other side reaches a recycle water index and is recycled to a production system for reuse; carrying out freezing crystallization on the thick water to separate out mirabilite, separating out the crystallization mother liquor so as to obtain the mirabilite and returning the crystallization mother liquor back to a membrane concentration system, and thermally dehydrating the mirabilite so as to obtain anhydrous sodium sulphate which is not less than 98% and used for selling; or evaporating and crystallizing the thick water with the sodium sulfate being not less than 10% through directly utilizing an evaporator so as to separate out the anhydrous sodium sulphate. The water source recycling and chemical raw material recovery are realized through low energy consumption. Through cooperatively using two technologies, the energy consumption for treating each tonnage of wastewater can be greatly reduced, and the water recovery rate of a whole treatment system is not less than 92%; the sodium sulfate content of an anhydrous sodium sulphate product is not less than 98%.
Description
Technical field
The invention belongs to a kind of chemical wastewater treatment technical field, be specifically related to a kind of white carbon black waste water treatment process.
Background technology
By the analysis of dialogue carbon black waste water water quality, cause the unmanageable major cause of white carbon black waste water to divide and cause by two steps, the one, higher containing sodium salt amount with respect to traditional wastewater from chemical industry, be difficult to remove by traditional biochemistry and physical chemistry method; The 2nd, relative and industrial raw material production technique, waste water is lower again containing sodium salt amount, uses traditional technology to put forward salt technique, if evaporate brine technique, floor space is large, easily causes local saline Land, is difficult for using in hinterland, uses single ton of energy consumption of flash process too high.The technique that in current domestic prior art, dialogue carbon black waste water is processed, mostly adopt direct flash concentration crystallization, in this technique, process the most processing costs of steam consumption of one ton of waste water just up to steam consumption 1.2t, or adopt 1～4 to imitate condensing crystal, process one ton of waste water consumption steam and be about 0.65～0.75t, power consumption 2～5kWh; And the white carbon black waste water of introducing in the present invention after nanofiltration membrane in one deck waste water of film concentration enrichment to 9～20% of sodium sulfate, through techniques such as freezing and crystallizings, thermal transition, obtain anhydrous sodium sulphate and can reuse evaporation condensed water again, the average steam consumption of processing one ton of water is 0.02～0.04t, power consumption is 10～15kWh, if adopting MVC technology is that 9～20% waste water carry out evaporative crystallization to being enriched to sodium sulphate content, the average steam consumption of processing one ton of water is 0t, and power consumption is 10～15kWh.
Summary of the invention
The object of the invention is to, overcome the deficiencies in the prior art, a kind of white carbon black waste water treatment process is provided, not only reclaimed Chemicals Sodium sulfate anhydrous.min(99), but also realized the recycle of water resources.
For solving the problems of the technologies described above, technical scheme of the present invention is:
White carbon black production waste water is through pre-treatment, make the waste water quality after processing reach the water quality requirement that enters film processing system, then by membrane filtration, in a side of film, the sodium sulfate in waste water is enriched to content >=10%, opposite side water outlet reaches reuse water index, returns to production system reuse.Dense water is isolated saltcake through freezing and crystallizing and is carried out the separated saltcake that obtains with crystalline mother solution, and crystalline mother solution returns to membrane concentration system, and saltcake is taken out through content >=98% Sodium sulfate anhydrous.min(99) that obtains of thermal dehydration; Or the dense water of sodium sulphate content >=10% is directly utilized to vaporizer, evaporative crystallization separation obtains Sodium sulfate anhydrous.min(99).By lower energy consumption, realize the recycle of water resources and the recovery of industrial chemicals.
White carbon black waste water regulates pH, flocculation, sedimentation through neutralization, supernatant liquor reaches film system influent quality through ultrafiltration, film processing system is by sodium sulfate enrichment in waste water, dense water enters subsequent evaporation, crystal system is processed, low dense water enters reverse osmosis system and obtains the de-salted water that saltiness is qualified, and this water can directly be used as system reuse water.Waste water pretreatment system is that white carbon black waste water regulates pH value is controlled between 6 ~ 8 through neutralization, then adds respectively the flocculation agents such as polymerize aluminum chloride and polyacrylamide to carry out flocculating settling, and the stillness of night after sedimentation reaches water outlet, film system influent quality through ultrafiltration.
Film processing system is respectively the treatment process that nanofiltration membrane and reverse osmosis membrane system combine, and by nanofiltration membrane, by the sodium sulfate enrichment in white carbon black waste water, the low dense water that nanofiltration is produced enters reverse osmosis system, and the de-salted water of output qualified water enters system reuse.
Dense water treatment system scheme one: can obtain anhydrous sodium sulphate and can reuse evaporation condensed water by techniques such as freezing and crystallizing, thermal transition centrifugation, dry, packings.This technique realizes the recycle of water resources and the recovery of industrial chemicals by lower energy consumption.Lower energy consumption refers to that the average steam consumption of one ton of water of every processing is 0.02～0.04t, and power consumption is 10～15kWh; The recovery of industrial chemicals refers to the recovery of Sodium sulfate anhydrous.min(99).Scheme two: can take out by evaporation, centrifugation, the finished product anhydrous sodium sulphate that obtains dry, packing, wherein the nucleus equipment in vapo(u)rization system is MVC vaporizer, and the evaporation of process less energy-consumption obtains Sodium sulfate anhydrous.min(99), simultaneously the recyclable water of condensation being evaporated.By lower energy consumption, realize the recycle of water resources and the recovery of industrial chemicals.Lower energy consumption refers to that 1 ton of every processing is about 10～15KWh white carbon black waste water consumption electric weight, and consuming quantity of steam can ignore; The recovery of industrial chemicals refers to the recovery of Sodium sulfate anhydrous.min(99).
Suitable nanofiltration membrane and reverse osmosis membrane described in aforementioned technique, mainly selects high pressure resistantly, and anti-solvable silicon pollutes stronger nanofiltration membrane, and reverse osmosis membrane is selected long industrial reverse osmosis membrane in common work-ing life.MVC vaporizer material need be selected the stronger titanium material of anti-brine corrosion or SMO254 stainless steel.
The invention has the beneficial effects as follows: in order effectively to remove sodium sulfate in white carbon black waste water, the inventor proposes the technique that nanofiltration membrane and reverse osmosis membrane combine, first pass through in dialogue carbon black waste water and regulate PH, flocculation, sedimentation, supernatant liquor reaches film system influent quality through ultrafiltration, again the waste water after ultrafiltration is passed through to suitable nanofiltration membrane and suitable reverse osmosis membrane two-stage membrane filtration, realize sodium sulfate in waste water and carry out enrichment simultaneously in dense water side, low dense water side is produced drop to≤40 μ S/ cm of water conductivity and is reached the object of reuse; The dense water process of film system produce.
Suitable process high-temperature is concentrated, crystallization obtains anhydrous sodium sulphate, then drying obtains the sodium sulfate product of content >=98%.Through being used in conjunction with of two kinds of techniques, the energy consumption of processing single ton of waste water reduces greatly, the whole treatment system water rate of recovery >=92%; Product Sodium sulfate anhydrous.min(99): sodium sulphate content >=98%; Scheme one: the average steam consumption of one ton of water of every processing is 0.02～0.04t, and power consumption is 10～15kWh; Scheme two: the energy consumption of 1 ton of white carbon black waste water of every processing is that electric quantity consumption is 10～15kWh, and steam consumption can be ignored; 1 ton of white carbon black waste water Sodium sulfate anhydrous.min(99) yield of every processing is: 20～50kg; The yield of 1 ton of high-quality water of white carbon black waste water of every processing is: 0.9 ton.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 for by evaporation, centrifugation, be dried, be packaged to be the process flow sheet of finished product anhydrous sodium sulphate.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment
By the waste water 1m from white carbon black production workshop
3wherein sodium sulfate quality content is about 3%, PH is 4～6, in the situation that stirring, adding quality percentage composition is 32% sodium hydroxide, the pH value of waste water is adjusted to 6～8, respectively polymerize aluminum chloride and waste water are added in the ratio of 0.03～0.07:1000, polyacrylamide and waste water are by 0.2～1.2:10 again
6ratio is added.Flocculating settling 10min, supernatant liquor enters ultrafiltration system, except suspended substance and the macromolecular colloid in anhydrating, measures water outlet SDI value≤3 after ultrafiltration.
Ultrafiltration water outlet and postorder reverse osmosis concentrated water are forced into 40 ~ 45bar and enter nanofiltration system, the low dense product water 0.77t of nanofiltration, sodium sulphate content≤2000mg/L, the high dense product water 0.3t of nanofiltration, sodium sulphate content >=10%; The low dense product water of nanofiltration is forced into 20bar and enters the de-salted water that reverse osmosis system obtains 0.7t specific conductivity≤40 μ S/ cm and enter system reuse.
Nanofiltration water outlet can adopt
The dense water that nanofiltration produces enters MVC vaporizer, enters to concentrate, crystallization, centrifugation, dryly obtains the Sodium sulfate anhydrous.min(99) that 0.03t sodium sulphate content is greater than 98%.
Following table is the comparison to two kinds of techniques in traditional technology and scheme.
| Project | Wastewater treatment capacity t | Power consumption KWH | Steam consumption t | Remarks |
| Tradition 4 effect evaporation technologies | 1 | 2～5 | 0.65～0.75 | |
| Scheme 1 (freezing, thermal transition, dry) | 1 | 10～15 | 0.02～0.04 | |
| Scheme 2 (MVC, dry) | 1 | 10～15 | 0 |
Claims (10)
1. white carbon black production waste water treatment process, is characterized in that: comprise the following steps:
1) pre-treatment: regulating the pH value of factory effluent is 6-8, then flocculation, sedimentation;
2) ultrafiltration: the supernatant liquor after sedimentation enters ultrafiltration system;
3) nanofiltration membrane is filtered: the waste water after ultrafiltration produces low dense water and strong brine after nanofiltration membrane system is filtered;
4) reverse osmosis membrane filtration: the low dense water after nanofiltration membrane is filtered filters through reverse osmosis membrane system, the de-salted water reuse obtaining, reverse osmosis concentrated water is got back to ultrafiltration system;
5) dense water treatment: the strong brine after nanofiltration membrane is filtered enters 3 through freezing and crystallizing, crystalline mother solution), concentrate, crystal obtains anhydrous sodium sulphate through intensification thermal transition, and after centrifugation, the dry anhydrous sodium sulphate finished product that obtains is taken out; Or the strong brine of nanofiltration membrane after filtering be after MVC evaporator evaporation is concentrated, recrystallize, centrifugation, the dry anhydrous sodium sulphate finished product that obtains are taken out.
2. white carbon black production waste water treatment process according to claim 1, is characterized in that: described step 1) is by adding sodium hydroxide to regulate the pH value of waste water.
3. white carbon black production waste water treatment process according to claim 1, it is characterized in that: in described step 1), flocculation agent used is polymerize aluminum chloride and polyacrylamide, polymerize aluminum chloride and waste water add in the ratio of 0.03～0.07:1000, and polyacrylamide and waste water are by 0.2～1.2:10
6ratio is added.
4. white carbon black production waste water treatment process according to claim 1, is characterized in that: water outlet SDI value≤3 described step 2) after ultrafiltration system.
5. white carbon black production waste water treatment process according to claim 1, is characterized in that: sodium sulphate content≤2000mg/L in the low dense water after the nanofiltration membrane described in described step 3) is filtered.
6. white carbon black production waste water treatment process according to claim 1, is characterized in that: sodium sulfate quality percentage composition >=10% in the haline water after the nanofiltration membrane described in described step 3) is filtered.
7. white carbon black production waste water treatment process according to claim 1, is characterized in that: the desalination electrical conductivity of water≤40 μ S/ cm that described step 4) obtains.
8. white carbon black production waste water treatment process according to claim 1, is characterized in that: the mother liquor that the separation in described step 5) obtains is got back in MVC vaporizer.
9. white carbon black production waste water treatment process according to claim 1, is characterized in that: the mother liquor that in described step 5), in scheme one, after thermal transition, centrifugation obtains, reenters freezing and crystallizing system and carry out crystallization.
10. white carbon black production waste water treatment process according to claim 1, is characterized in that: the steam condensing water reuse that in described step 5, MVC vaporizer produces; In described step 5, be dried and obtain the Sodium sulfate anhydrous.min(99) that sodium sulphate content is greater than 98%.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104326612A (en) * | 2014-10-24 | 2015-02-04 | 南京科盛环保科技有限公司 | Method and system for recovering salt from waste water treatment system |
| CN104445706A (en) * | 2014-10-11 | 2015-03-25 | 南京中电环保股份有限公司 | Method for concentrating high-concentration brine |
| CN104692575A (en) * | 2014-12-22 | 2015-06-10 | 内蒙古久科康瑞环保科技有限公司 | Crystallization treatment method and device of high salt wastewater |
| CN104828843A (en) * | 2015-03-31 | 2015-08-12 | 合肥工业大学 | Method for extracting food grade potassium bicarbonate from alkaline wastewater system with low concentration of K<+> |
| CN105565567A (en) * | 2015-12-25 | 2016-05-11 | 石家庄杰克化工有限公司 | Method for processing high-salt organic wastewater in EDTA sodium cyanide method production |
| CN105753226A (en) * | 2014-12-19 | 2016-07-13 | 中国石油化工股份有限公司 | Carbon black water depth treatment method and apparatus thereof |
| CN105948174A (en) * | 2016-05-26 | 2016-09-21 | 宜宾天原集团股份有限公司 | Comprehensive utilization method for chlorination-process titanium dioxide post-treatment wastewater |
| CN107043191A (en) * | 2016-12-26 | 2017-08-15 | 青岛美高集团有限公司 | A kind of silica gel produces treatment method for high-salinity wastewater |
| CN107814457A (en) * | 2017-12-11 | 2018-03-20 | 广州叶林环保科技有限公司 | A kind of carbon black leaches inorganic salt treatment evaporative crystallization technique |
| CN109205828A (en) * | 2018-09-06 | 2019-01-15 | 安徽凤阳赛吉元无机材料有限公司 | A kind of method of sulfate-containing wastewater conductivity in reduction carbon white production process |
| CN112723567A (en) * | 2020-12-28 | 2021-04-30 | 中昊黑元化工研究设计院有限公司 | Rapid clarification device and method for white carbon black production wastewater by precipitation method |
| CN113044859A (en) * | 2021-02-23 | 2021-06-29 | 四川思达能环保科技有限公司 | Method for recovering sodium sulfate from white carbon black feed liquid |
| CN114291955A (en) * | 2022-01-18 | 2022-04-08 | 龙佰集团股份有限公司 | Method for jointly utilizing iron pigment wastewater and reduced titanium tail gas |
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Cited By (20)
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| 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 |
| CN104445706A (en) * | 2014-10-11 | 2015-03-25 | 南京中电环保股份有限公司 | Method for concentrating high-concentration brine |
| CN104326612A (en) * | 2014-10-24 | 2015-02-04 | 南京科盛环保科技有限公司 | Method and system for recovering salt from waste water treatment system |
| CN104326612B (en) * | 2014-10-24 | 2016-03-09 | 南京科盛环保科技有限公司 | A kind of method and system reclaiming salt from Waste Water Treatment |
| CN105753226A (en) * | 2014-12-19 | 2016-07-13 | 中国石油化工股份有限公司 | Carbon black water depth treatment method and apparatus thereof |
| CN105753226B (en) * | 2014-12-19 | 2018-07-20 | 中国石油化工股份有限公司 | Carbon black method for deeply treating water and device |
| CN104692575B (en) * | 2014-12-22 | 2017-02-22 | 内蒙古久科康瑞环保科技有限公司 | Crystallization treatment method and device of high salt wastewater |
| CN104692575A (en) * | 2014-12-22 | 2015-06-10 | 内蒙古久科康瑞环保科技有限公司 | Crystallization treatment method and device of high salt wastewater |
| CN104828843A (en) * | 2015-03-31 | 2015-08-12 | 合肥工业大学 | Method for extracting food grade potassium bicarbonate from alkaline wastewater system with low concentration of K<+> |
| CN104828843B (en) * | 2015-03-31 | 2016-07-06 | 合肥工业大学 | A kind of method extracting food grade potassium bicarbonate from low concentration K+ alkali liquor waste water system |
| CN105565567A (en) * | 2015-12-25 | 2016-05-11 | 石家庄杰克化工有限公司 | Method for processing high-salt organic wastewater in EDTA sodium cyanide method production |
| CN105948174A (en) * | 2016-05-26 | 2016-09-21 | 宜宾天原集团股份有限公司 | Comprehensive utilization method for chlorination-process titanium dioxide post-treatment wastewater |
| CN105948174B (en) * | 2016-05-26 | 2019-07-02 | 宜宾天原集团股份有限公司 | Chloride process titanium dioxide flour flow design wastewater utilization method |
| CN107043191A (en) * | 2016-12-26 | 2017-08-15 | 青岛美高集团有限公司 | A kind of silica gel produces treatment method for high-salinity wastewater |
| CN107814457A (en) * | 2017-12-11 | 2018-03-20 | 广州叶林环保科技有限公司 | A kind of carbon black leaches inorganic salt treatment evaporative crystallization technique |
| CN109205828A (en) * | 2018-09-06 | 2019-01-15 | 安徽凤阳赛吉元无机材料有限公司 | A kind of method of sulfate-containing wastewater conductivity in reduction carbon white production process |
| CN109205828B (en) * | 2018-09-06 | 2021-11-19 | 安徽凤阳赛吉元无机材料有限公司 | Method for reducing conductivity of sulfate-containing wastewater in white carbon black production process |
| CN112723567A (en) * | 2020-12-28 | 2021-04-30 | 中昊黑元化工研究设计院有限公司 | Rapid clarification device and method for white carbon black production wastewater by precipitation method |
| CN113044859A (en) * | 2021-02-23 | 2021-06-29 | 四川思达能环保科技有限公司 | Method for recovering sodium sulfate from white carbon black feed liquid |
| CN114291955A (en) * | 2022-01-18 | 2022-04-08 | 龙佰集团股份有限公司 | Method for jointly utilizing iron pigment wastewater and reduced titanium tail gas |
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