CN102153224A - Treatment technology for industrial sewage from sodium carboxymethylcellulose - Google Patents
Treatment technology for industrial sewage from sodium carboxymethylcellulose Download PDFInfo
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- CN102153224A CN102153224A CN 201110061148 CN201110061148A CN102153224A CN 102153224 A CN102153224 A CN 102153224A CN 201110061148 CN201110061148 CN 201110061148 CN 201110061148 A CN201110061148 A CN 201110061148A CN 102153224 A CN102153224 A CN 102153224A
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Abstract
The invention relates to a treatment technology for industrial sewage from sodium carboxymethylcellulose. The technical processes are as follows: (1) discharging the industrial sewage which is generated from the production of sodium carboxymethylcellulose into a water collecting tank; (2) filtering the sewage of the water collecting tank firstly by a filtration device so as to remove solid impurities; (3) evaporating and concentrating the filtered sewage by an evaporator; (4) discharging concentrated mother liquor into a mother liquor tank for precipitation so as to separate solid from liquid; (5) after solid-liquid separation, discharging the mother liquor at the upper layer of the mother liquor tank into the evaporator for evaporation and concentration again and discharging the solid part at the lower layer into a centrifugal machine for centrifugal drying; and (6) discharging the mother liquor which is discharged from the centrifugal machine into a mother liquor collecting tank, and washing and bagging the dried solid. The treatment technology for industrial sewage from sodium carboxymethylcellulose conducts multiple times of evaporation and purification on waste liquor, is high in efficiency and low in energy consumption, obtains concentrated industrial salt, achieves comprehensive utilization of resources, and simultaneously realizes zero discharge of sewage.
Description
Technical field
The present invention relates to industrial sewage treatment process technical field, especially a kind of Xylo-Mucine industrial sewage treatment process.
Background technology
Xylo-Mucine (CMC) is the staple product of cellulose ethers, it is the derivative that natural cellulose obtains through chemical modification, can be used as foodstuff additive, flocculation agent, inner complex, emulsifying agent, thickening material, water-holding agent, film forming material etc., be widely used in fields such as food, daily-use chemical industry, pottery, electronics, leather, plastics, agricultural chemicals.The unique pollutent that produces in the Xylo-Mucine production process is exactly the waste liquid after ethanol is reclaimed in distillation, and the chemical oxygen demand (COD) of waste liquid (COD) is very high, reaches 50000-100000mg/L, and 1 ton of CMC of every production approximately will produce 2.5 tons of waste liquids.Waste liquid is very serious to the pollution of environment, the CMC liquid waste disposal there is more achievement in research both at home and abroad, existing multiple treatment process, utilize little electrolysis-UASB-catalytic oxidation to handle CMC waste water as university of Tongji University: adopt micro-electrolysis method that CMC waste water is carried out pre-treatment, micro-electrolysis method reaches as high as 35% to CMC waste water COD clearance, and biodegradability (B/C) is brought up to about 0.35 from 0.12 simultaneously, optimum operating condition: water inlet pH value 3.0, HRT is 75min, and coagulation pH is 9, and the Fe/C ratio is 3: 1.After finishing little electrolysis, adopt UASB reactor for treatment CMC waste water, the operational conditions of UASB technology the best: HRT is that 44h, temperature are that 37 ℃, reflux ratio are 1: 20.The clearance of COD can reach more than 82% under these situations.Last aerobic treatment, one-level aerobic on three HRT conditions the clearance of COD certain difference is arranged, the following COD clearance of HRT=32h is about 80%, the COD clearance is 70% during while two-stage biological contact oxidation HRT=16h, water outlet COD is below 100mg/L, though this facture can reach discharging standards, can not utilize the effective salinity in the sewage, the waste resource.
A kind of treatment process of South China Science ﹠ Engineering University: 95% of CMC production waste can be converted into product, realize the comprehensive utilization of resources of CMC production waste, reach the zero release of CMC production waste.It for solid content 35% CMC production waste, recyclable liquid ethanol acid to sewage total amount 10-15%, oxyacetic acid content is 40%, can also reclaim whole salinities contained in the sewage simultaneously, and the sewage after the processing can reach the production technique water requirement of CMC.The oxyacetic acid that is reclaimed can be used for industrial uses such as washing composition; The mixing salt that is reclaimed can be used as industrial salt.This method utilizes the CMC production waste to go out products such as Industrial Salt, oxyacetic acid for raw material production, realizes the zero release of CMC sewage, has higher economic value, but investment is bigger.Present this achievement place applied research stage.
Open country, Yutai, Shandong human relations specialization difficult to understand worker company limited: waste water reclaims about 0.25% ethanol earlier through pervaporation, revaporization is removed 80% water, still liquid separates then, filter residue is a low-diet salt, filtrate again after concentrating and separating thick oxyacetic acid sodium solution, through dilution after the ion-exchange the oxyacetic acid crude product, reconcentration separate the oxyacetic acid crude product, carry out oxidizing reaction with sulfuric acid and hydrogen again and make the oxalic acid finished product, come into the market to sell as product behind the purifying.
External facture has: there is ultraviolet chlorination process in the U.S.; There is the hydrogen peroxide treatment process in Japan; Germany adopts exchange resin method.Method is different, but still has shortcoming separately, fails to realize the zero release of surface water.At energy-saving and emission-reduction, protection environment, particularly risen to today of China's national strategy at the protection water body, address this problem and seem extremely important.
The component of effluent that Xylo-Mucine production is produced mainly is small amount of ethanol, a large amount of salinity (NaCl is main), by product hydroxy acid sodium, impurities in raw materials, Mierocrystalline cellulose several products that hydrolysis produces under alkaline condition.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency in the prior art, a kind of Xylo-Mucine industrial sewage treatment process is provided, realize making full use of the technical problem of salinity in the sewage.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Xylo-Mucine industrial sewage treatment process, and its technical process is as follows:
(1) will produce the industrial sewage that Xylo-Mucine produces and enter water collecting basin;
(2) sewage of water collecting basin is at first by filter plant filtering solid impurity;
(3) filtered sewage concentrates by evaporator evaporation;
(4) mother liquor after concentrating enters mother liquor tank and carries out sedimentation and make solid-liquid separation;
(5) after solid-liquid separation, the mother liquor on mother liquor tank upper strata enters vaporizer and carries out evaporation concentration once more, and the solid part of lower floor enters whizzer and carries out centrifuge dripping;
(6) liquid of whizzer discharge enters the mother liquor collecting tank, the solid after drying is washed pack.
Vaporizer in the step (3) comprises placed in-line successively triple-effect evaporator, 1st effective evaporator and 2nd effect evaporator, and sewage enters triple-effect evaporator, 1st effective evaporator and 2nd effect evaporator successively and carries out evaporation concentration.
The temperature of waste liquid is controlled to be 90 ± 5 ℃ in the triple-effect evaporator, vacuum degree control is-0.02～-0.04, the temperature of waste liquid is controlled to be 80 ± 5 ℃ in the 1st effective evaporator, vacuum degree control is-0.04～-0.06, the temperature of waste liquid is controlled to be 60 ± 5 ℃ in the 2nd effect evaporator, and vacuum degree control is-0.06～-0.1.
Mother liquor tank quantity in the step (4) is two, be respectively one of corresponding 1st effective evaporator and imitate two effect mother liquor tanks of mother liquor tank and corresponding 2nd effect evaporator, the higher mother liquor of concentration enters one and imitates mother liquor tank and carry out sedimentation after the 1st effective evaporator evaporation concentration, the mother liquor that concentration is lower after the 1st effective evaporator evaporation concentration enters 2nd effect evaporator and carries out evaporation concentration, and the dense mother liquor after the 2nd effect evaporator evaporation concentration enters two effect mother liquor tanks and carries out sedimentation.
Described mother liquor tank is the thermal-insulating type mother liquor tank, and holding temperature is controlled to be 60～100 ℃, and waste liquid is isolated oxyacetic acid and sodium salt thereof when this temperature range.
Step (5), one imitates in the mother liquor tank after the solid-liquid separation, the mother liquor on upper strata is entered 2nd effect evaporator carry out evaporation concentration once more, and the solid part of lower floor enters the whizzer centrifuge dripping; Two imitate treat solid-liquid separation in the mother liquors after, the mother liquor on upper strata is entered 2nd effect evaporator carries out evaporation concentration once more.
The invention has the beneficial effects as follows, Xylo-Mucine industrial sewage treatment process of the present invention carries out the multiple tracks evaporation to waste liquid and purifies, the efficient height, energy consumption is low, obtain spissated industrial salt and the reuse water that reaches the industrial reuse water quality standard, realize comprehensive utilization of resources, realize sewage zero-discharge simultaneously.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the schematic flow sheet of Xylo-Mucine industrial sewage treatment process most preferred embodiment of the present invention.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the synoptic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
The most preferred embodiment of Xylo-Mucine industrial sewage treatment process of the present invention as shown in Figure 1, its technical process is as follows:
(1) will produce the industrial sewage that Xylo-Mucine produces and enter water collecting basin;
(2) at first by filter plant filtering solid impurity, the sewage outlet of water collecting basin is provided with under meter to the sewage of water collecting basin, according to arts demand dominant discharge size, avoids the excessive or too small influence to subsequent step of flow;
(3) filtered sewage concentrates by evaporator evaporation;
(4) mother liquor after concentrating enters mother liquor tank and carries out sedimentation and make solid-liquid separation;
(5) after solid-liquid separation, the mother liquor on mother liquor tank upper strata enters vaporizer and carries out evaporation concentration once more, and the solid part of lower floor enters whizzer and carries out centrifuge dripping;
(6) liquid of whizzer discharge enters the mother liquor collecting tank, the solid after drying is washed pack.
Vaporizer in the step (3) comprises placed in-line successively triple-effect evaporator, 1st effective evaporator and 2nd effect evaporator, and sewage enters triple-effect evaporator, 1st effective evaporator and 2nd effect evaporator successively and carries out evaporation concentration.
The temperature of waste liquid is controlled to be 90 ± 5 ℃ in the triple-effect evaporator, vacuum degree control is-0.02～-0.04, the temperature of waste liquid is controlled to be 80 ± 5 ℃ in the 1st effective evaporator, vacuum degree control is-0.04～-0.06, the temperature of waste liquid is controlled to be 60 ± 5 ℃ in the 2nd effect evaporator, and vacuum degree control is-0.06～-0.1.Carry out evaporation concentration by the multiple tracks vaporizer, the efficient height, energy consumption is low.
Mother liquor tank quantity in the step (4) is two, be respectively one of corresponding 1st effective evaporator and imitate two effect mother liquor tanks of mother liquor tank and corresponding 2nd effect evaporator, the higher mother liquor of concentration enters one and imitates mother liquor tank and carry out sedimentation after the 1st effective evaporator evaporation concentration, the mother liquor that concentration is lower after the 1st effective evaporator evaporation concentration enters 2nd effect evaporator and carries out evaporation concentration, and the dense mother liquor after the 2nd effect evaporator evaporation concentration enters two effect mother liquor tanks and carries out sedimentation.Described mother liquor tank is the thermal-insulating type mother liquor tank, and holding temperature is controlled to be 60～100 ℃.
Step (5): one imitates in the mother liquor tank after the solid-liquid separation, the mother liquor on upper strata is entered 2nd effect evaporator carry out evaporation concentration once more, and the solid part of lower floor enters the whizzer centrifuge dripping; Two imitate treat solid-liquid separation in the mother liquors after, the mother liquor on upper strata is entered 2nd effect evaporator carries out evaporation concentration once more.
Be provided with recycle pump between one effect mother liquor tank and the 2nd effect evaporator, be provided with shell pump between an effect mother liquor tank and the whizzer, be provided with recycle pump between two effect mother liquor tanks and the 2nd effect evaporator, be provided with shell pump between two effect mother liquor tanks and the whizzer.
Claims (6)
1. Xylo-Mucine industrial sewage treatment process, its technical process is as follows:
(1) will produce the industrial sewage that Xylo-Mucine produces and enter water collecting basin;
(2) sewage of water collecting basin is at first by filter plant filtering solid impurity;
(3) filtered sewage concentrates by evaporator evaporation;
(4) mother liquor after concentrating enters mother liquor tank and carries out sedimentation and make solid-liquid separation;
(5) after solid-liquid separation, the mother liquor on mother liquor tank upper strata enters vaporizer and carries out evaporation concentration once more, and the solid part of lower floor enters whizzer and carries out centrifuge dripping;
(6) liquid of whizzer discharge enters the mother liquor collecting tank, the solid after drying is washed pack.
2. Xylo-Mucine industrial sewage treatment process as claimed in claim 1, it is characterized in that the described vaporizer of step 3 comprises placed in-line successively triple-effect evaporator, 1st effective evaporator and 2nd effect evaporator, sewage enters triple-effect evaporator, 1st effective evaporator and 2nd effect evaporator successively and carries out evaporation concentration.
3. Xylo-Mucine industrial sewage treatment process as claimed in claim 2, it is characterized in that: the temperature of waste liquid is controlled to be 90 ± 5 ℃ in the described triple-effect evaporator, vacuum degree control is-0.02～-0.04, the temperature of waste liquid is controlled to be 80 ± 5 ℃ in the 1st effective evaporator, vacuum degree control is-0.04～-0.06, the temperature of waste liquid is controlled to be 60 ± 5 ℃ in the 2nd effect evaporator, and vacuum degree control is-0.06～-0.1.
4. Xylo-Mucine industrial sewage treatment process as claimed in claim 2, it is characterized in that the described mother liquor tank quantity of step 4 is two, be respectively one of corresponding 1st effective evaporator and imitate two effect mother liquor tanks of mother liquor tank and corresponding 2nd effect evaporator, the higher mother liquor of concentration enters one and imitates mother liquor tank and carry out sedimentation after the 1st effective evaporator evaporation concentration, the mother liquor that concentration is lower after the 1st effective evaporator evaporation concentration enters 2nd effect evaporator and carries out evaporation concentration, and the dense mother liquor after the 2nd effect evaporator evaporation concentration enters two effect mother liquor tanks and carries out sedimentation.
5. Xylo-Mucine industrial sewage treatment process as claimed in claim 4 is characterized in that: described mother liquor tank is the thermal-insulating type mother liquor tank, and holding temperature is 60～100 ℃.
6. Xylo-Mucine industrial sewage treatment process as claimed in claim 4, it is characterized in that step 5 described imitates in the mother liquor tank after the solid-liquid separation, the mother liquor on upper strata is entered 2nd effect evaporator carry out evaporation concentration once more, the solid part of lower floor enters the whizzer centrifuge dripping; Two imitate treat solid-liquid separation in the mother liquors after, the mother liquor on upper strata is entered 2nd effect evaporator carries out evaporation concentration once more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110061148 CN102153224A (en) | 2011-03-15 | 2011-03-15 | Treatment technology for industrial sewage from sodium carboxymethylcellulose |
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| CN 201110061148 CN102153224A (en) | 2011-03-15 | 2011-03-15 | Treatment technology for industrial sewage from sodium carboxymethylcellulose |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381782A (en) * | 2011-09-22 | 2012-03-21 | 江门市慧信净水材料有限公司 | Recovery treatment method for wastewater generated in production of carboxymethyl cellulose |
| CN103359864A (en) * | 2012-04-03 | 2013-10-23 | 山东光大科技发展有限公司 | Technique for evaporating and recycling wastewater generated in hydroxypropyl methyl cellulose production |
| CN107619072A (en) * | 2017-10-24 | 2018-01-23 | 舒城联科环境科技有限公司 | It is a kind of to handle high COD, the curing agent and application method of high salinity waste water |
| CN109205904A (en) * | 2018-10-12 | 2019-01-15 | 江苏盛勤环境工程有限公司 | The producing wastewater treatment of sodium cellulose glycolate |
| CN115286180A (en) * | 2022-08-06 | 2022-11-04 | 安庆市鑫祥瑞环保科技有限公司 | Treatment process of cellulose ether waste liquid |
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| CN101117258A (en) * | 2007-07-24 | 2008-02-06 | 浙江大学 | Method for treating epoxy resin waste-water with high alkalinity, high salt and high content of organics |
| CN101671089A (en) * | 2009-10-12 | 2010-03-17 | 福建三农集团股份有限公司 | Pretreatment method for glyphosate industrial waste water |
| CN101717131A (en) * | 2009-11-04 | 2010-06-02 | 山东京博控股发展有限公司 | Method for treating N-(phosphonomethyl)iminodiacetic acid wastewater |
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2011
- 2011-03-15 CN CN 201110061148 patent/CN102153224A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117258A (en) * | 2007-07-24 | 2008-02-06 | 浙江大学 | Method for treating epoxy resin waste-water with high alkalinity, high salt and high content of organics |
| CN101671089A (en) * | 2009-10-12 | 2010-03-17 | 福建三农集团股份有限公司 | Pretreatment method for glyphosate industrial waste water |
| CN101717131A (en) * | 2009-11-04 | 2010-06-02 | 山东京博控股发展有限公司 | Method for treating N-(phosphonomethyl)iminodiacetic acid wastewater |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381782A (en) * | 2011-09-22 | 2012-03-21 | 江门市慧信净水材料有限公司 | Recovery treatment method for wastewater generated in production of carboxymethyl cellulose |
| CN103359864A (en) * | 2012-04-03 | 2013-10-23 | 山东光大科技发展有限公司 | Technique for evaporating and recycling wastewater generated in hydroxypropyl methyl cellulose production |
| CN103359864B (en) * | 2012-04-03 | 2014-08-20 | 山东光大科技发展有限公司 | Technique for evaporating and recycling wastewater generated in hydroxypropyl methyl cellulose production |
| CN107619072A (en) * | 2017-10-24 | 2018-01-23 | 舒城联科环境科技有限公司 | It is a kind of to handle high COD, the curing agent and application method of high salinity waste water |
| CN107619072B (en) * | 2017-10-24 | 2020-11-10 | 舒城联科环境科技有限公司 | Curing agent for treating high-COD and high-salinity wastewater and using method |
| CN109205904A (en) * | 2018-10-12 | 2019-01-15 | 江苏盛勤环境工程有限公司 | The producing wastewater treatment of sodium cellulose glycolate |
| CN115286180A (en) * | 2022-08-06 | 2022-11-04 | 安庆市鑫祥瑞环保科技有限公司 | Treatment process of cellulose ether waste liquid |
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Application publication date: 20110817 |