CN112062340A - Method for treating sulfur-containing wastewater - Google Patents
Method for treating sulfur-containing wastewater Download PDFInfo
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- CN112062340A CN112062340A CN202010936358.0A CN202010936358A CN112062340A CN 112062340 A CN112062340 A CN 112062340A CN 202010936358 A CN202010936358 A CN 202010936358A CN 112062340 A CN112062340 A CN 112062340A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention relates to the technical field of wastewater treatment, in particular to a method for treating sulfur-containing wastewater. The method comprises the following steps: feeding the sulfur-containing wastewater into a neutralization tank for neutralization treatment, and feeding the treated wastewater into a primary sedimentation tank; b) separating the precipitate and the supernatant of the wastewater in a primary sedimentation tank; c) stirring and pre-aerating the wastewater by using a regulating tank; d) the wastewater is subjected to suspended matter separation in the air floatation treatment device, the wastewater after suspended matter removal is sent to a titanium dioxide photocatalytic oxidizer, and the air floatation treatment device is used for removing oil and flocculating suspended matter from the wastewater by using a demulsifier and a flocculating agent. The invention adopts a supercritical water oxidation method, and has the advantages of quick reaction, good treatment effect, high process closure, more advantages in treating complex systems, and the like. And a good foundation is laid for the subsequent treatment process. And filtering and separating the water by using an ultra-frequency vibration UF membrane and an RO membrane to mainly remove chroma and residual micromolecular pollutants in the water. The application has low operation cost and good wastewater treatment effect.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for treating sulfur-containing wastewater.
Background
Sulfur-containing wastewater is produced in factories such as petroleum refining, petrochemical industry, coking, dyes, printing and dyeing, leather making, paper making and the like, and serious pollution is caused to the environment. Different treatment methods are needed for sulfur-containing wastewater from different sources, and the existing treatment methods comprise a gas stripping method, a liquid-phase catalytic oxidation method, a heterogeneous catalytic oxidation method, a combustion method and the like, but the treatment methods have limitations, some methods have low treatment efficiency, and the combustion method and the like can cause secondary pollution due to the generation of SO2 and SO 3. The prior treatment process usually adopts a combined process of chemical coagulation and biological treatment, but COD and BOD5 can not reach the standard for a long time in the operation process of the process, and the main influence factor is that high-concentration sulfate ions inhibit the subsequent biological treatment process. The chemical coagulation in the original process mainly has the function of removing sulfate ions, but in the environment of high-concentration organic wastewater, the coagulation effect is poor, so that the removal of the sulfate ions does not achieve the expected effect, and the subsequent biological treatment process is seriously inhibited. In addition, many sulfur-containing wastewater has complex components, contains other pollutants such as phenol, cyanogen, ammonia and the like besides S2-, and needs to be treated respectively, so the process is complex.
Disclosure of Invention
In order to solve the technical problems described in the background technology, the invention provides a method for treating sulfur-containing wastewater, and the method has the advantages of rapid reaction, good treatment effect, high sealing property in the drinking process, more superiority in treating a complex system and the like by adopting a supercritical water oxidation method. And a good foundation is laid for the subsequent treatment process. And filtering and separating the water by using an ultra-frequency vibration UF membrane and an RO membrane to mainly remove chroma and residual micromolecular pollutants in the water. The application has low operation cost and good wastewater treatment effect.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for treating sulfur-containing wastewater comprises the following steps:
a) sending the sulfur-containing wastewater into a neutralization tank for neutralization reaction treatment, and sending the treated wastewater into a primary sedimentation tank;
b) separating the precipitate and the supernatant of the wastewater in a primary sedimentation tank, and sending the wastewater treated in the primary sedimentation tank into an adjusting tank;
c) after the wastewater is stirred and pre-aerated by the adjusting tank, the wastewater is sent into an air floatation treatment device;
d) separating suspended matters from the wastewater in an air floatation treatment device, feeding the wastewater after removing the suspended matters into a titanium dioxide photo-catalytic oxidizer, removing oil and flocculating the suspended matters from the wastewater by using a demulsifier and a flocculating agent in the air floatation treatment device, and feeding the treated wastewater into a supercritical water oxidation system;
e) in the supercritical water oxidation system, oxidizing organic matters in the precipitate into carbon dioxide and water, and simultaneously, after completely decomposing the intermediate converted substance, sending the wastewater into the ultra-frequency vibration UF system for filtering;
f) and (4) delivering the filtered wastewater in the ultra-frequency vibration UF system into an ultra-frequency vibration RO system for filtering to finally obtain recyclable water.
Specifically, the flocculant is polyacrylamide.
Specifically, the ultra-frequency vibration UF system is composed of a high-frequency vibration exciter, an UF membrane and a pipe shell.
Specifically, the super-frequency vibration RO system is composed of a high-frequency vibration exciter, an RO membrane and a pipe shell.
The invention has the beneficial effects that: the invention provides a method for treating sulfur-containing wastewater, which has the advantages of quick reaction, good treatment effect, high process closure, more advantages in treating a complex system and the like by adopting a supercritical water oxidation method. And a good foundation is laid for the subsequent treatment process. And filtering and separating the water by using an ultra-frequency vibration UF membrane and an RO membrane to mainly remove chroma and residual micromolecular pollutants in the water. The application has low operation cost and good wastewater treatment effect.
Drawings
The invention is further described with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the framework of the present invention;
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams illustrating only the basic structure of the invention in a schematic manner, and thus show only the constitution related to the invention.
Fig. 1 is a schematic diagram of the framework of the present invention.
As shown in the attached figure 1, the method for treating the sulfur-containing wastewater comprises the following steps:
a) sending the sulfur-containing wastewater into a neutralization tank for neutralization reaction treatment, and sending the treated wastewater into a primary sedimentation tank;
b) separating the precipitate and the supernatant of the wastewater in a primary sedimentation tank, sending the wastewater treated in the primary sedimentation tank into an adjusting tank, and transporting the sludge discharged from the primary sedimentation tank;
c) after the wastewater is stirred and pre-aerated by the adjusting tank, the wastewater is sent into an air floatation treatment device;
d) separating suspended matters from the wastewater in an air floatation treatment device, feeding the wastewater after removing the suspended matters into a titanium dioxide photocatalytic oxidizer, removing oil and flocculating the suspended matters from the wastewater by using a demulsifier and a flocculating agent in the air floatation treatment device, feeding the treated wastewater into a supercritical water oxidation system, and carrying out outward treatment on sludge discharged by the air floatation treatment device;
e) in the supercritical water oxidation system, oxidizing organic matters in the precipitate into carbon dioxide and water, and simultaneously, after completely decomposing the intermediate converted substance, sending the wastewater into the ultra-frequency vibration UF system for filtering;
f) and (4) delivering the filtered wastewater in the ultra-frequency vibration UF system into an ultra-frequency vibration RO system for filtering to finally obtain recyclable water.
The flocculating agent is polyacrylamide.
The ultra-frequency vibration UF system consists of a high-frequency vibration exciter, an UF membrane and a pipe shell.
The super-frequency vibration RO system is composed of a high-frequency vibration exciter, an RO membrane and a tube shell.
The neutralization pond is a water treatment structure for neutralizing acidic or alkaline wastewater. The method is used for treating the low-concentration acid-containing alkali-containing wastewater with the acid content of less than 3-4% and the alkali content of less than 2%.
The air floating treatment device is characterized in that air is introduced into water in a micro-bubble mode, the micro-bubbles are adhered to particles suspended in the water to form a water-gas-particle three-phase mixed system, and after the particles are adhered with the bubbles, the particles float upwards with the density smaller than that of the water to form a scum layer which is separated from the water.
Supercritical Water Oxidation (SCWO) technology is a technology capable of realizing deep Oxidation treatment of various organic wastes. Supercritical water oxidation is to completely oxidize organic matters into clean substances such as H2O, CO2, N2 and the like through oxidation, S, P and the like are converted into salts with the highest valence for stabilization, and heavy metal oxidation stabilization solid phase exists in ash. The principle of the Supercritical Water Oxidation (SCWO) technology is that Supercritical Water is used as a reaction medium, and organic matters are rapidly converted into CO2, H2O, N2 and other harmless small molecules through a homogeneous Oxidation reaction.
The ultra-frequency vibration UF system consists of a high-frequency vibration exciter, an UF membrane and a pipe shell. The vibration UF system vibrates the UF membrane through a high-frequency vibration exciter, so that strong shearing force and normal force are generated, solids and pollutants in the wastewater float from the surface of the membrane, concentrated water with a turbulent flow effect flows out of the membrane system, and the blockage of membrane pores is avoided.
The super-frequency vibration RO system vibrates the RO membrane through the high-frequency vibration exciter, so that strong shearing force and normal force are generated, solid and pollutants in waste water float from the surface of the membrane, and the membrane system is flowed out along with concentrated water forming a turbulent flow effect, so that the blockage of membrane pores is avoided.
The supercritical water oxidation system has the advantages of quick reaction, good treatment effect, high process closure, more advantages in treating complex systems, and the like. And a good foundation is laid for the subsequent treatment process. After the wastewater is treated by supercritical water oxidation, pollutants in water are basically removed, but deeper treatment is needed to achieve the purpose of water resource recycling, the former treatment process generally adopts a roll type UF static membrane and an RO static membrane to separate the water and the pollutants in the water, and the new process adopts an over-frequency vibration UF membrane and an RO membrane to carry out filtration and separation treatment, so that the chroma and the residual micromolecule pollutants in the water are mainly removed. Compared with the traditional roll type static membrane, the ultra-frequency vibration membrane has the advantages of super-strong anti-fouling and anti-blocking performance, high membrane flux, long service life cycle, long cleaning cycle, low operation cost, compact structure, small occupied area and the like.
In light of the foregoing description of preferred embodiments according to the invention, many modifications and variations can be made by the worker skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A method for treating sulfur-containing wastewater is characterized by comprising the following steps: the method comprises the following steps:
a) sending the sulfur-containing wastewater into a neutralization tank for neutralization reaction treatment, and sending the treated wastewater into a primary sedimentation tank;
b) separating the precipitate and the supernatant of the wastewater in a primary sedimentation tank, and sending the wastewater treated in the primary sedimentation tank into an adjusting tank;
c) after the wastewater is stirred and pre-aerated by the adjusting tank, the wastewater is sent into an air floatation treatment device;
d) separating suspended matters from the wastewater in an air floatation treatment device, feeding the wastewater after removing the suspended matters into a titanium dioxide photo-catalytic oxidizer, removing oil and flocculating the suspended matters from the wastewater by using a demulsifier and a flocculating agent in the air floatation treatment device, and feeding the treated wastewater into a supercritical water oxidation system;
e) in the supercritical water oxidation system, oxidizing organic matters in the precipitate into carbon dioxide and water, and simultaneously, after completely decomposing the intermediate converted substance, sending the wastewater into the ultra-frequency vibration UF system for filtering;
f) and (4) delivering the filtered wastewater in the ultra-frequency vibration UF system into an ultra-frequency vibration RO system for filtering to finally obtain recyclable water.
2. The method for treating sulfur-containing wastewater according to claim 1, wherein: the flocculant is polyacrylamide.
3. The method for treating sulfur-containing wastewater according to claim 1, wherein: the ultra-frequency vibration UF system consists of a high-frequency vibration exciter, an UF membrane and a pipe shell.
4. The method for treating sulfur-containing wastewater according to claim 1, wherein: the super-frequency vibration RO system is composed of a high-frequency vibration exciter, an RO membrane and a tube shell.
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CN202010936358.0A CN112062340A (en) | 2020-09-08 | 2020-09-08 | Method for treating sulfur-containing wastewater |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104118956A (en) * | 2014-07-28 | 2014-10-29 | 蒙自矿冶有限责任公司 | Method for treating sewage |
CN106256780A (en) * | 2015-06-18 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field |
CN209702380U (en) * | 2019-01-15 | 2019-11-29 | 沈阳碧海环保技术有限公司 | A kind of sulfur-bearing organic wastewater processing unit |
CN110526453A (en) * | 2019-09-25 | 2019-12-03 | 北京华电利源科技有限公司 | The method for handling desulfurization wastewater |
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2020
- 2020-09-08 CN CN202010936358.0A patent/CN112062340A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104118956A (en) * | 2014-07-28 | 2014-10-29 | 蒙自矿冶有限责任公司 | Method for treating sewage |
CN106256780A (en) * | 2015-06-18 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field |
CN209702380U (en) * | 2019-01-15 | 2019-11-29 | 沈阳碧海环保技术有限公司 | A kind of sulfur-bearing organic wastewater processing unit |
CN110526453A (en) * | 2019-09-25 | 2019-12-03 | 北京华电利源科技有限公司 | The method for handling desulfurization wastewater |
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