CN115893714A - High-concentration degradation-resistant wastewater treatment process - Google Patents
High-concentration degradation-resistant wastewater treatment process Download PDFInfo
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- CN115893714A CN115893714A CN202211375153.5A CN202211375153A CN115893714A CN 115893714 A CN115893714 A CN 115893714A CN 202211375153 A CN202211375153 A CN 202211375153A CN 115893714 A CN115893714 A CN 115893714A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a high-concentration degradation-resistant wastewater treatment process, which comprises the following steps: the method comprises the following steps: the physicochemical system is used for carrying out oil separation treatment on the wastewater generated in the production processing or treatment process, carrying out demulsification treatment after the oil separation treatment, adding medicines during the demulsification treatment, and carrying out air floatation treatment after the demulsification treatment. According to the invention, by optimizing and integrating the process route, paying attention to the safety, high efficiency, scientificity and environmental protection of process integration, an optimal integrated process flow is determined by performing experimental research on various waste liquid treatment processes, a complete integrated dangerous waste liquid industrialization treatment line is formed, different treatment processes are determined according to different waste liquids, and then various processes are integrated and fused.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a high-concentration degradation-resistant wastewater treatment process.
Background
High-concentration dust and high-temperature airflow in flue gas in the denitration process of a coal-fired power plant can cause the catalyst to be inactivated due to dust deposition, abrasion, sintering and the like, meanwhile, heavy metals such As As, cr, hg and the like in the flue gas can be enriched on the catalyst along with the airflow to cause catalyst poisoning, and the effective service life of the catalyst is about 3 years generally. With the comprehensive construction of the flue gas denitration device of the domestic coal-fired power plant, the deactivated denitration catalyst replaced every year in China is about 50 ten thousand, and the first peak of SCR denitration catalyst scrapping is about to come about in three years.
The hazardous waste liquid has complex components and great harmfulness, the water quality change has no unity and commonality, the components of the waste liquid are not clear in the actual treatment process, the treatment process is difficult to select, the classification treatment difficulty is great, 5 kinds of hazardous waste liquids such as HW09, HW17, HW34, HW35 and HW49 generated in regions such as domestic plants are subjected to innocent treatment, the components of the hazardous waste liquids generated in different industries are very different, and in addition, the collection of waste production enterprises is not classified, so that the great difficulty is increased for the treatment of the hazardous waste liquids. Most enterprises generating hazardous waste liquid do not carry out waste liquid treatment supporting construction due to the problems of unsmooth cost and process routes and the like, enterprises with treatment qualification also adopt the traditional treatment means of materialization, solidification and neutralization landfill, the treatment cost is high, the incombustible hazardous waste liquid is not fully utilized to cause resource waste, and the economical efficiency is still to be improved.
Dangerous waste liquids such as emulsion, electroplating waste liquid, waste acid liquid, waste alkali liquid, leachate, laboratory waste liquid and the like generated in the production process have complex water quality and large component difference, and multiple waste liquids cannot be treated together by only a single process route.
Therefore, in view of the above, research and improvement are made for the existing structure and defects, and a high-concentration degradation-resistant wastewater treatment process is provided, so as to achieve the purpose of higher practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-concentration degradation-resistant wastewater treatment process, and the purpose and the effect of the process are achieved by the following specific technical means:
a high-concentration degradation-resistant wastewater treatment process comprises the following steps:
the method comprises the following steps: the physicochemical system is used for carrying out oil separation treatment on wastewater generated in the production processing or treatment process, carrying out demulsification treatment after the oil separation treatment, adding medicaments during the demulsification treatment, and carrying out air floatation treatment after the demulsification treatment;
step two: the evaporation system enters the buffer tank after being treated by the physicochemical system in the step one, preheats the wastewater in the buffer tank, then carries out one-effect evaporation, and carries out two-effect evaporation again, and solid-liquid separation is realized in the evaporation process respectively;
step three: and (2) treating the solid impurities obtained in the step (II) by using a biochemical regulating tank, adding other wastewater and filtrate into the biochemical regulating tank, and entering an integrated biochemical system, wherein the treated sludge enters a sludge concentration device and is subjected to filter pressing to form a filter cake, the liquid is subjected to mud-water separation by using an MBR tank, the wastewater in the MBR tank flows into an ultra-frequency vibration NF system for filtering, and is filtered by an RO filter membrane to reach a reuse water tank.
Preferably, solid impurities generated in the oil separation, demulsification and air flotation treatment processes are separated into a sludge concentration device for filter pressing, the generated filtrate enters an evaporation system or a biochemical regulating tank for secondary treatment, and the solid impurities are filter-pressed into filter cakes.
Preferably, in the air flotation treatment process, the chemical reaction is carried out, part of the waste liquid after the reaction enters the comprehensive reaction tank, the chemical reaction is carried out again, and then the waste liquid enters the buffer tank, wherein the solid impurities also enter the sludge concentration device for treatment.
Preferably, in the second step, after the two-effect evaporation, the evaporated gas is condensed by a condenser and then enters a vacuum system, the unevaporated solid enters a solid-liquid separation system, the salty mud in the solid-liquid separation system is separated, and the rest solid impurities enter a sewage treatment system.
Preferably, in the third step, the concentrated water filtered in the NF system and the RO filter membrane is subjected to downward circulation treatment in the evaporation system and then enters the evaporation system again for circulation.
Preferably, the filtrate generated in the sludge concentration device enters a biochemical regulating tank for treatment, and the separated solid impurities are subjected to pressure filtration to form a filter cake.
Preferably, the waste water comprises waste emulsion, waste acid, waste alkali, electroplating waste liquid and leachate.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, by optimizing and integrating the process route, paying attention to the safety, high efficiency, scientificity and environmental protection of process integration, an optimal integrated process flow is determined by performing experimental research on various waste liquid treatment processes, a complete integrated dangerous waste liquid industrialization treatment line is formed, different treatment processes are determined according to different waste liquids, and then various processes are integrated and fused.
In the invention, the symptomatic treatment effect is realized for the waste liquid or solid impurities generated in the treatment process, and the filtered waste water in the treatment process can circularly enter the system again for reaction and treatment, thereby reducing the occurrence of the condition of insufficient treatment.
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FIG. 1 is a schematic diagram of the technical scheme of the present invention.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example (b):
as shown in figure 1:
the invention provides a high-concentration degradation-resistant wastewater treatment process, which comprises the following steps:
the method comprises the following steps: the physicochemical system is used for carrying out oil removal treatment on the wastewater generated in the production processing or treatment process, carrying out demulsification treatment after the oil removal treatment, adding medicines during the demulsification treatment, and carrying out air floatation treatment after the demulsification treatment;
step two: the evaporation system enters the buffer tank after being treated by the physicochemical system in the step one, preheats the wastewater in the buffer tank, then carries out one-effect evaporation, and carries out two-effect evaporation again, and solid-liquid separation is realized in the evaporation process respectively;
step three: the sewage treatment system is characterized in that solid impurities obtained in the step two are treated by the biochemical regulating tank, other wastewater and filtrate are added into the biochemical regulating tank and enter the integrated biochemical system, the treated sludge enters the sludge concentration device and is pressed into a filter cake by the sludge concentration device, the liquid is subjected to mud-water separation by the MBR tank, the wastewater in the MBR tank flows into the ultra-frequency vibration NF system to be filtered, and the wastewater is filtered by the RO filtering membrane and reaches the reuse water tank.
As an implementation mode of the invention, solid impurities generated in the processes of oil removal, demulsification and air flotation treatment are separated into the sludge concentration device for filter pressing, the generated filtrate enters an evaporation system or a biochemical regulating tank for secondary treatment, and the solid impurities are filter-pressed into filter cakes.
As an implementation mode of the invention, in the air flotation treatment process, the chemical reaction is carried out, part of waste liquid after the reaction enters the comprehensive reaction tank, the chemical reaction is carried out again, and then the waste liquid enters the buffer tank, wherein solid impurities also enter the sludge concentration device for treatment.
In the second step, after the two-effect evaporation, the evaporated gas is condensed by a condenser and then enters a vacuum system, the solid which is not evaporated enters a solid-liquid separation system, the salt mud in the solid-liquid separation system is separated, and the rest solid impurities enter a sewage treatment system.
In the third step, the concentrated water filtered by the NF system and the RO filter membrane is subjected to downward circulation treatment in the evaporation system, and then enters the evaporation system again for circulation.
As an embodiment of the invention, the filtrate generated in the sludge concentration device enters a biochemical regulating tank for treatment, and the separated solid impurities are subjected to pressure filtration to form filter cakes.
As an embodiment of the present invention, the waste water includes waste emulsion, waste acid, waste alkali, plating waste liquid, and leachate.
The specific use mode and function of the embodiment are as follows:
according to the invention, by carrying out optimized integration on a process route and paying attention to the safety, high efficiency, scientificity and environmental protection of process integration, an optimal integrated process flow is determined by carrying out experimental research on various waste liquid treatment processes, a complete integrated dangerous waste liquid industrialized treatment line is formed, different treatment processes are determined according to different waste liquids, various processes are integrated and fused, the symptomatic treatment effect is realized on the waste liquid or solid impurities generated in the treatment process, and the filtered waste water in the treatment process can be recycled into the system for reaction and treatment, so that the occurrence of the situation of inadequate treatment is reduced.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. A high-concentration degradation-resistant wastewater treatment process is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: the physicochemical system is used for carrying out oil separation treatment on wastewater generated in the production processing or treatment process, carrying out demulsification treatment after the oil separation treatment, adding medicaments during the demulsification treatment, and carrying out air floatation treatment after the demulsification treatment;
step two: the evaporation system enters the buffer tank after being treated by the physicochemical system in the step one, preheats the wastewater in the buffer tank, then carries out one-effect evaporation, and carries out two-effect evaporation again, and solid-liquid separation is realized in the evaporation process respectively;
step three: and (2) treating the solid impurities obtained in the step (II) by using a biochemical regulating tank, adding other wastewater and filtrate into the biochemical regulating tank, and entering an integrated biochemical system, wherein the treated sludge enters a sludge concentration device and is subjected to filter pressing to form a filter cake, the liquid is subjected to mud-water separation by using an MBR tank, the wastewater in the MBR tank flows into an ultra-frequency vibration NF system for filtering, and is filtered by an RO filter membrane to reach a reuse water tank.
2. The process for treating high-concentration refractory wastewater as defined in claim 1, wherein: and separating solid impurities generated in the oil separation, demulsification and air flotation treatment processes into a sludge concentration device, performing filter pressing, allowing the generated filtrate to enter an evaporation system or a biochemical regulating tank for secondary treatment, and filter-pressing the solid impurities into filter cakes.
3. The process for treating high-concentration degradation-resistant wastewater according to claim 1, wherein: in the air floatation treatment process, a chemical adding reaction is carried out, part of waste liquid after the reaction enters a comprehensive reaction tank, the chemical adding reaction is carried out again, and then the waste liquid enters a buffer tank, wherein solid impurities also enter a sludge concentration device for treatment.
4. The process for treating high-concentration degradation-resistant wastewater according to claim 1, wherein: in the second step, after the two-effect evaporation, the evaporated gas is condensed by a condenser and then enters a vacuum system, the unevaporated solid enters a solid-liquid separation system, the salty mud in the solid-liquid separation system is separated, and the rest solid impurities enter a sewage treatment system.
5. The process for treating high-concentration degradation-resistant wastewater according to claim 1, wherein: in the third step, the concentrated water filtered in the NF system and the RO filter membrane is subjected to downward circulation treatment in the evaporation system and then enters the evaporation system again for circulation.
6. The process for treating high-concentration degradation-resistant wastewater according to claim 1, wherein: and the filtrate generated in the sludge concentration device enters a biochemical regulating tank for treatment, and the separated solid impurities are subjected to filter pressing to form filter cakes.
7. The process for treating high-concentration refractory wastewater as defined in claim 1, wherein: the waste water comprises waste emulsion, waste acid, waste alkali, electroplating waste liquid and leachate.
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Citations (6)
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| KR20030054734A (en) * | 2001-12-26 | 2003-07-02 | 주식회사환경과생명 | Industrial wastewater reusing system using combination froth separation process, hollow fiber filter process and advanced oxidation process |
| CN105217883A (en) * | 2015-09-16 | 2016-01-06 | 成都美富特膜科技有限公司 | Based on the garbage burning factory percolate treating process of special membrane |
| CN108372180A (en) * | 2018-02-05 | 2018-08-07 | 宜兴市欧亚华都环境工程有限公司 | A kind of processing method of changing food waste into resources |
| CN110028186A (en) * | 2019-02-28 | 2019-07-19 | 苏州希图环保科技有限公司 | A kind of high-concentration emulsified liquid efficient treatment process |
| CN110937761A (en) * | 2019-12-25 | 2020-03-31 | 苏州希图环保科技有限公司 | High-efficiency treatment system and process for high-concentration oil-containing heavy metal waste liquid |
| CN111925064A (en) * | 2020-08-18 | 2020-11-13 | 安徽省巨仁环境技术有限公司 | Treatment process method of oily wastewater of metal cutting fluid |
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- 2022-11-04 CN CN202211375153.5A patent/CN115893714A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030054734A (en) * | 2001-12-26 | 2003-07-02 | 주식회사환경과생명 | Industrial wastewater reusing system using combination froth separation process, hollow fiber filter process and advanced oxidation process |
| CN105217883A (en) * | 2015-09-16 | 2016-01-06 | 成都美富特膜科技有限公司 | Based on the garbage burning factory percolate treating process of special membrane |
| CN108372180A (en) * | 2018-02-05 | 2018-08-07 | 宜兴市欧亚华都环境工程有限公司 | A kind of processing method of changing food waste into resources |
| CN110028186A (en) * | 2019-02-28 | 2019-07-19 | 苏州希图环保科技有限公司 | A kind of high-concentration emulsified liquid efficient treatment process |
| CN110937761A (en) * | 2019-12-25 | 2020-03-31 | 苏州希图环保科技有限公司 | High-efficiency treatment system and process for high-concentration oil-containing heavy metal waste liquid |
| CN111925064A (en) * | 2020-08-18 | 2020-11-13 | 安徽省巨仁环境技术有限公司 | Treatment process method of oily wastewater of metal cutting fluid |
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