CN111661939A - Clean production process for treating fur degreasing wastewater - Google Patents
Clean production process for treating fur degreasing wastewater Download PDFInfo
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- CN111661939A CN111661939A CN201910171164.3A CN201910171164A CN111661939A CN 111661939 A CN111661939 A CN 111661939A CN 201910171164 A CN201910171164 A CN 201910171164A CN 111661939 A CN111661939 A CN 111661939A
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- wastewater
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The invention relates to the technical field of wastewater cleaning processes, in particular to a clean production process for treating fur degreasing wastewater. Including, S1: pretreating fur degreasing wastewater to obtain primary treatment wastewater; s2: performing secondary treatment on the primary treatment wastewater by using a targeted fixed bed adsorption device; s3: and (3) recycling the product of the targeted fixed bed adsorption device. The treatment method provided by the invention not only can effectively realize emission reduction and recycling of the alkali and the degreasing agent, but also can recover more fur grease, reduce the emission of process products, reduce the load intensity of oxidation biochemistry, and further reduce the treatment capacity and treatment cost of fur degreasing wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater cleaning processes, in particular to a clean production process for treating fur degreasing wastewater.
Background
The degreasing production process in fur industry generally comprises the steps of continuously rotating fur under the heating state of alkali and a degreasing agent to achieve the purpose of removing fur grease. In the conventional treatment process, most of degreasing liquid generated in the process is neutralized, oxidized and biochemically treated by acid. Because the fur grease is an ultra-large molecule, the oxidation is difficult to be thorough, and the biochemical performance after the oxidation damage is not good. Therefore, the subsequent environmental protection project has the problems of high investment, high operation cost, waste salt generation and difficult standard reaching after biochemical treatment.
Considering the recycling of alkali and degreasing agents and the value of deep processing of fur fat, a clean production process mode is researched: the fur grease and a small amount of degreasing agent compounded with the fur grease are completely separated from a composition system of alkali liquor and degreasing agent liquor, so that the degreasing agent and the alkali liquor which are not compounded with the fur grease are changed into roles of recycling and reusing from the roles of needing to be treated originally, and the purposes of reducing emission and realizing clean production of the alkali and the degreasing agent are achieved. Meanwhile, the separated fur lipid can be separated and purified by chromatography to produce high-purity lipid, thereby creating higher value.
Disclosure of Invention
The invention aims to solve the problems of high investment, high running cost, waste salt generation and difficult standard reaching after biochemical treatment of subsequent environmental protection projects in the prior art, and provides a clean production process for treating fur degreasing wastewater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a clean production process for treating fur degreasing wastewater comprises the following steps:
s1: pretreating fur degreasing wastewater to obtain primary treatment wastewater:
performing primary filtration on the fur degreasing wastewater to separate fur impurities, adding fat-poor water for washing, and performing secondary filtration to obtain primary treatment wastewater and primary crude fat;
s2: carrying out secondary treatment on the primary treatment wastewater by using a targeted fixed bed adsorption device:
the primary treatment wastewater is adsorbed by a targeted fixed bed adsorption device to obtain primary lean water; adding a base and/or a degreasing agent to the primary fat-depleted water to obtain the fat-depleted water;
s3: the target fixed bed adsorption device product is reused:
and carrying out thermal desorption regeneration on the targeted fixed bed adsorption device for treating the primary treatment wastewater to obtain a lipid-rich concentrated solution, and cooling and filtering to obtain recovered lipid.
Optionally, subjecting the recovered lipids and/or the primary crude lipids to affinity chromatography to obtain useful lipids.
Optionally, the targeted fixed bed adsorption unit consists of a resin column.
Optionally, the primary treatment wastewater is adsorbed by a targeted fixed bed adsorption device, comprising:
and adding an analytic solution into the targeted fixed bed adsorption device, and carrying out adsorption and analysis on the primary treatment wastewater under the action of the analytic solution, wherein the analytic solution is recycled.
Optionally, the adsorption and desorption of the primary treatment wastewater under the action of the desorption solution comprises:
the adsorption speed of the targeted fixed bed adsorption device is 1-3 BV/H, and the adsorption temperature is 20-35 ℃.
Optionally, the adsorption and desorption of the primary treatment wastewater under the action of the desorption solution comprises:
the analysis speed of the thermal analysis regeneration is as follows: 0.5-0.6BV/H, and the resolving temperature is 60-65 ℃.
Optionally, the resolving liquid is an alcohol-water solution; wherein, the alcohol in the analysis solution is methanol or ethanol, and the mass fraction of the methanol or ethanol solution in the analysis solution is 40-60%.
Compared with the prior art, the invention has the beneficial effects that:
the treatment method provided by the invention not only can effectively realize emission reduction and recycling of the alkali and the degreasing agent, but also can recover more fur grease, reduce the emission of process products, reduce the load intensity of oxidation biochemistry, and further reduce the treatment capacity and treatment cost of fur degreasing wastewater.
Drawings
FIG. 1 is a flow chart of a clean production process for treating degreasing wastewater of fur in example 1 of the present invention;
FIG. 2 is a flow chart of a clean production process for treating degreasing wastewater of fur in example 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The embodiment provides a clean production process for treating fur degreasing wastewater, and as shown in figure 1, the method comprises the following steps:
s101: pretreating fur degreasing wastewater to obtain primary treatment wastewater:
performing primary filtration on the fur degreasing wastewater to separate fur impurities, adding fat-poor water for washing, and performing secondary filtration to obtain primary treatment wastewater and primary crude fat;
specifically, the fur degreasing wastewater is primarily filtered while hot, and impurities such as fur and the like are separated; washing with a small amount of hot lean water; and cooling the reactants, and carrying out secondary filtration on the separated lipids to obtain primary treatment wastewater and primary crude lipids.
S102: performing secondary treatment on the primary treatment wastewater by using a targeted fixed bed adsorption device;
the primary treatment wastewater is adsorbed by a targeted fixed bed adsorption device to obtain primary lean water; adding a base and/or a degreasing agent to the primary fat-depleted water to obtain the fat-depleted water;
specifically, the primary treatment wastewater is adsorbed by a targeted fixed bed adsorption device, crude fat in a liquid phase is adsorbed onto resin in the fixed bed adsorption device, and primary fat-poor water containing alkali and a degreasing agent flows down;
optionally, adding an analytic solution into the targeted fixed bed adsorption device, and performing adsorption and analysis on the primary treatment wastewater under the action of the analytic solution, wherein the analytic solution is recycled;
alternatively, the fixed bed adsorption device is composed of a plurality of groups of resin columns with the same specification, wherein the adsorption material in the resin columns can be any material with adsorption capacity or a modified material of the material with adsorption capacity.
Optionally, the fixed bed adsorption device selects special targeted macroporous adsorption resin, the targeted adsorption macroporous adsorption resin directionally and preferentially adsorbs lipids and a complex of the lipids and the degreasing agent, and the degreasing agent and alkali are not basically adsorbed, so that the purpose of completely separating the lipids is achieved. The targeted macroporous adsorption resin is formed by coating and modifying macroporous adsorption resin as a base material, the used macroporous adsorption resin base material can be AB-8 type, HPD-100 type, DM130 type, H-103 type, XAD-1 type, XAD-7 type, HP-20 type, CAD-30 type, CAD-40 type, CAD-45 type, CAD-47 type, CAD-49 type, HT-PA, HT-PB, HT-PC, HT-B, HT-312 type and HT-1600 type, and the ultrahigh cross-linked macroporous adsorption resin is particularly selected.
S103: the target fixed bed adsorption device product is reused:
carrying out thermal desorption regeneration on the targeted fixed bed adsorption device for treating the primary treatment wastewater to obtain a lipid-rich concentrated solution, and cooling and filtering to obtain recovered lipid;
specifically, the adsorption speed of the fixed bed adsorption device is 1-3 BV/H (BV: resin bed volume), and the adsorption temperature is 20-35 ℃;
specifically, the thermal desorption regeneration rate is: 0.5-0.6BV/H (mass ratio), and the analysis temperature is 60-65 ℃.
Example 2
The embodiment provides a clean production process for treating fur degreasing wastewater, and as shown in fig. 2, the method comprises the following steps:
s101: pretreating fur degreasing wastewater to obtain primary treatment wastewater:
the sheep fur degreasing wastewater is primarily filtered when being hot, and impurities such as fur and the like are separated. Washed with a small amount of hot lean water. And cooling the reactants to 30 ℃, and carrying out secondary filtration and separation on the separated lipids to obtain primary treatment wastewater and primary crude lipids.
S102: performing secondary treatment on the primary treatment wastewater by using a targeted fixed bed adsorption device;
the primary treated wastewater is absorbed by a targeted fixed bed absorption device, crude fat in a liquid phase is absorbed on resin in the fixed bed absorption device, and primary lean water containing alkali and degreasing agent flows down;
optionally, the targeted fixed bed adsorption device comprises two groups of targeted fixed bed adsorption devices with different operation modes, wherein one group is used for being connected in series in the reaction process for primary wastewater treatment adsorption, and the other group is used for thermal desorption regeneration; the two groups of target fixed bed adsorption devices in different operation modes respectively comprise one or more than one set of target fixed bed adsorption device; for example, two sets of targeted fixed bed adsorption devices are arranged, one set of targeted fixed bed adsorption devices runs in series, and the other set of targeted fixed bed adsorption devices performs thermal desorption regeneration; for another example, the targeted fixed bed adsorption device is provided with three sets, two sets are operated in series, and the other set is subjected to thermal desorption regeneration.
S103: the target fixed bed adsorption device product is reused:
carrying out thermal desorption regeneration on the targeted fixed bed adsorption device, wherein the desorption temperature is 65 ℃; obtaining a lipid-rich concentrated solution through analysis, cooling and filtering, and filtering and roughly separating precipitated lipids to obtain recovered lipids;
specifically, when the target fixed bed adsorption device is subjected to thermal desorption regeneration, firstly, an analytic solution is added to generate an analytic reaction solution, an analytic diluted solution in the analytic reaction solution is recycled, the analytic reaction solution of the analytic diluted solution is separated by cooling and filtering, a secondary analytic solution and recovered lipid are separated, and the secondary analytic solution is recycled;
optionally, a small amount of alkali and a degreasing agent are properly added to the primary lean water separated in the thermal desorption process of the targeted fixed bed adsorption device to obtain the lean water, so that the cyclic utilization of the lean water is realized;
optionally, the obtained crude primary lipid and/or recovered lipid is subjected to RTA chromatography to obtain high purity lanolin, and other miscellaneous lipids are collected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A clean production process for treating fur degreasing wastewater comprises the following steps:
s1: pretreating fur degreasing wastewater to obtain primary treatment wastewater:
performing primary filtration on the fur degreasing wastewater to separate fur impurities, adding fat-poor water for washing, and performing secondary filtration to obtain primary treatment wastewater and primary crude fat;
s2: carrying out secondary treatment on the primary treatment wastewater by using a targeted fixed bed adsorption device:
the primary treatment wastewater is adsorbed by a targeted fixed bed adsorption device to obtain primary lean water; adding a base and/or a degreasing agent to the primary fat-depleted water to obtain the fat-depleted water;
s3: the target fixed bed adsorption device product is reused:
and carrying out thermal desorption regeneration on the targeted fixed bed adsorption device for treating the primary treatment wastewater to obtain a lipid-rich concentrated solution, and cooling and filtering to obtain recovered lipid.
2. The clean production process for treating the degreasing wastewater of fur, according to claim 1, further comprising subjecting the recovered lipid and/or the crude primary lipid to affinity chromatography to obtain useful lipid.
3. The clean production process for treating fur degreasing wastewater as claimed in claim 1, wherein the targeted fixed bed adsorption device is composed of a resin column.
4. The clean production process for treating fur degreasing wastewater as claimed in claim 1, wherein the primary treatment wastewater is adsorbed by a targeted fixed bed adsorption device, comprising:
and adding an analytic solution into the targeted fixed bed adsorption device, and carrying out adsorption and analysis on the primary treatment wastewater under the action of the analytic solution, wherein the analytic solution is recycled.
5. The clean production process for treating fur degreasing wastewater as claimed in claim 4, wherein the adsorption and desorption of the primary treatment wastewater under the action of the desorption solution comprises:
the adsorption speed of the targeted fixed bed adsorption device is 1-3 BV/H, and the adsorption temperature is 20-35 ℃.
6. The clean production process for treating fur degreasing wastewater as claimed in claim 4, wherein the adsorption and desorption of the primary treatment wastewater under the action of the desorption solution comprises:
the analysis speed of the thermal analysis regeneration is as follows: 0.5-0.6BV/H, and the resolving temperature is 60-65 ℃.
7. The clean production process for treating fur degreasing wastewater as claimed in claim 4, wherein the desorption solution is an alcohol-water solution; wherein, the alcohol in the analysis solution is methanol or ethanol, and the mass fraction of the methanol or ethanol solution in the analysis solution is 40-60%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910171164.3A CN111661939A (en) | 2019-03-07 | 2019-03-07 | Clean production process for treating fur degreasing wastewater |
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| CN201910171164.3A CN111661939A (en) | 2019-03-07 | 2019-03-07 | Clean production process for treating fur degreasing wastewater |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367845A (en) * | 2008-09-27 | 2009-02-18 | 浙江大学 | Decolorization method for raffinose raffinate |
| CN201400611Y (en) * | 2008-03-14 | 2010-02-10 | 许建民 | Device for saving water, abating pollution and reducing energy consumption during degreasing and washing processes prior to coating process |
| CN102260020A (en) * | 2011-05-27 | 2011-11-30 | 河南省科学院化学研究所有限公司 | Deep processing method of leather production biochemical tail water with resin adsorption method |
| CN107253807A (en) * | 2017-08-11 | 2017-10-17 | 江苏博纳科水务环保科技有限公司 | A kind of process for cleanly preparing of the organic difficult biochemical waste water of renewable targeting absorption pretreatment |
| CN109319876A (en) * | 2018-12-24 | 2019-02-12 | 安徽国星生物化学有限公司 | A kind of resin adsorption method processing acetic acid waster water process |
-
2019
- 2019-03-07 CN CN201910171164.3A patent/CN111661939A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201400611Y (en) * | 2008-03-14 | 2010-02-10 | 许建民 | Device for saving water, abating pollution and reducing energy consumption during degreasing and washing processes prior to coating process |
| CN101367845A (en) * | 2008-09-27 | 2009-02-18 | 浙江大学 | Decolorization method for raffinose raffinate |
| CN102260020A (en) * | 2011-05-27 | 2011-11-30 | 河南省科学院化学研究所有限公司 | Deep processing method of leather production biochemical tail water with resin adsorption method |
| CN107253807A (en) * | 2017-08-11 | 2017-10-17 | 江苏博纳科水务环保科技有限公司 | A kind of process for cleanly preparing of the organic difficult biochemical waste water of renewable targeting absorption pretreatment |
| CN109319876A (en) * | 2018-12-24 | 2019-02-12 | 安徽国星生物化学有限公司 | A kind of resin adsorption method processing acetic acid waster water process |
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