CN114605010A - Method for removing antimony from printing and dyeing wastewater - Google Patents
Method for removing antimony from printing and dyeing wastewater Download PDFInfo
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
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- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- 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
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2001/007—Processes including a sedimentation step
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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
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- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- 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
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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Abstract
The invention discloses a method for removing antimony from printing and dyeing wastewater, which belongs to the technical field of sewage treatment and comprises the following steps: and injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value, performing acid precipitation treatment, and adjusting the temperature of the wastewater subjected to the acid precipitation treatment. In the invention, when the electro-catalytic component works, a positive-negative difference is generated between an external power supply and a module polar plate, so that partial pollutants can be directly oxidized into carbon dioxide and water on the surface of an electrode, meanwhile, water in solution, additional hydrogen peroxide, DEG and the like can also be oxidized into intermediate products with strong oxidizing property such as hydroxyl free radicals and the like under the action of the electrode, the intermediate products can also oxidize the pollutants in the wastewater, so that the content of antimony in the wastewater can reach less than or equal to 50 mu g/L after the wastewater is treated by the process, and the additional catalytic oxidants such as hydrogen peroxide, DEG and the like mainly play a role in providing the concentration of direct or indirect oxidation factors in a reaction system, and effectively shortening the time of oxidation-reduction reaction.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a method for removing antimony from printing and dyeing wastewater.
Background
The printing and dyeing wastewater contains high-concentration pollutants such as dye, organic auxiliary agent, heavy metal and the like, wherein the heavy metal antimony is generally detected in the printing and dyeing wastewater such as terylene and the like, mainly comes from the dissolution of catalyst such as ethylene glycol antimony, antimony acetate or antimony trioxide, auxiliary agent and antimony-containing dye under the technological conditions of higher pH value such as boiling, alkali decrement and the like, the biotoxicity and risk of antimony in the wastewater are not negligible, the biological enzyme denaturation and chromosome variation can be caused, and the biological enzyme has accumulation property in organisms, carcinogenic toxicity and the like.
The emission limit of antimony in printing and dyeing wastewater in the Taihu lake region is specified to be 80 mu g/L in the discharge Standard of antimony pollutants in wastewater of textile dyeing and finishing industry (DB 32/3432-; the limit value of antimony emission in printing and dyeing wastewater in a region with small water environment capacity is reduced to 50 mug/L. Therefore, the method for efficiently removing the antimony in the printing and dyeing wastewater has important practical significance for standard-reaching emission and toxic and harmful heavy metal pollution control of enterprises.
At present, most enterprises adopt a mode of adding polyferric sulfate for treating antimony-containing printing and dyeing wastewater, the process can only treat 2-3mg/L and is difficult to treat below 0.1mg/L, and in addition, a few enterprises adopt adsorption and Fenton methods for treatment.
The prior art scheme mainly has three kinds:
(1) flocculation precipitation method: the method mainly adopts the steps of adding agents such as ferric salt, lime and the like for flocculation and precipitation, and the method is used for treating the waste water to 2-3mg/L and is difficult to treat the waste water to below 0.1 mg/L.
(2) An adsorption method: the treatment method is to use waste iron ore, river sand, active carbon, cellulose and other easy-to-adsorb media for adsorption, and has the defects that the adsorbent is easily saturated and the saturated adsorbent cannot be treated.
(3) The Fenton method: organic matter is oxidized by a Fenton oxidation method, and then antimony in water is removed by adjusting pH back to generate precipitate, wherein the defects are as follows: the Fenton method is not easy to control, and the amount of generated iron mud is large.
Based on the above, the invention designs a method for removing antimony from printing and dyeing wastewater, so as to solve the problems.
Disclosure of Invention
The invention aims to: the method for removing antimony from the printing and dyeing wastewater is provided in order to solve the problems that a flocculation precipitation method is difficult to treat below 0.1mg/L, an adsorption method is easy to saturate, a saturated adsorbent cannot be treated, a Fenton method is difficult to control, and the amount of generated iron mud is large.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for removing antimony from printing and dyeing wastewater comprises the following steps:
(1) injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value, and performing acidification treatment;
(2) adjusting the temperature of the wastewater subjected to the acid precipitation treatment to 40-60 ℃, and pumping the wastewater into a comprehensive reaction system, wherein the comprehensive reaction system is coupled with an electro-catalytic component, a circulating system, a compressed air distribution system, a tail gas system and a stirring system;
(3) adjusting the pH value of the wastewater treated by the comprehensive reaction system, and pumping the wastewater into a sedimentation tank for sedimentation;
(4) after the sedimentation is carried out in the sedimentation tank, the supernatant reaches the standard and is discharged to a discharge water tank, and the sludge in the sedimentation tank is intensively discharged into a sludge tank.
As a further description of the above technical solution:
in the step (2), the wastewater stays in the comprehensive reaction system for 1-3h, and hydrogen peroxide and a DEG catalytic oxidation reactant are added in the reaction process.
As a further description of the above technical solution:
the pH value is adjusted to be 2-5 in the step (1), and the pH value is adjusted to be 7-9 in the step (3).
As a further description of the above technical solution:
the pH value is adjusted to 3-4 in the step (1), and the pH value is adjusted to 7.5-8.5 in the step (3).
As a further description of the above technical solution:
and (3) the electrocatalysis component in the step (2) works under the action of electrification, and a positive pole difference and a negative pole difference are generated between an external power supply and the module pole plate when the electrocatalysis component works.
As a further description of the above technical solution:
the electrocatalysis component is connected with the reactor through a pipeline, the pipeline is provided with an axial flow circulating pump, the axial flow circulating pump is used for providing power for external circulation of reaction liquid in the reaction process, and the surface of the reactor is connected with a horizontal supporting surface through four supporting legs.
As a further description of the above technical solution:
the reactor top is provided with the stirring rake, the stirring rake provides the mixing action in the reaction process for add medicament hydrogen peroxide solution, DEG and solution carry out better mixture.
As a further description of the above technical solution:
the compressed air distribution system provides oxygen required in the reaction process, and the air distribution system provides mixing power for the lower part of the reactor.
As a further description of the above technical solution:
the tail gas system is internally provided with a particle filler layer, and the component particles of the particle filler layer consist of 30-40% of activated carbon, 5-30% of iron series and 5-30% of nickel series.
As a further description of the above technical solution:
the DEG catalytic oxidation reactant mainly comprises the following components: c: 5% -30%, H: 5% -20%, O: 10-30% and other 5% -20%.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
in the invention, the axial-flow circulating pump is arranged on a pipeline between the reactor and the compressed air distribution system and is used for providing power for external circulation of reaction liquid in the reaction process, so that the whole wastewater reaction system can realize batch or continuous operation, the maneuverability is strong, the electrocatalysis component works under the action of electricity, and positive and negative differences are generated between an external power supply and a module polar plate when the electrocatalysis component works, so that partial pollutants can be directly oxidized into carbon dioxide and water on the surface of an electrode, meanwhile, water, external hydrogen peroxide, DEG and the like in the solution can also be oxidized into intermediate products with strong oxidizing property such as hydroxyl free radicals and the like under the action of the electrode, the intermediate products can also oxidize the pollutants in the wastewater, so that the content of antimony in the wastewater can reach less than or equal to 50 mu g/L after the wastewater is treated by the process, and the external catalytic oxidants such as hydrogen peroxide, DEG and the like mainly have the function of providing the concentration of direct or indirect oxidation factors in the reaction system, effectively shorten the time of oxidation-reduction reaction.
Drawings
FIG. 1 is a process flow diagram of a method for removing antimony from printing and dyeing wastewater according to the present invention;
FIG. 2 is a block diagram of a method for removing antimony from printing and dyeing wastewater according to the present invention;
FIG. 3 is a schematic structural diagram of a method for removing antimony from printing and dyeing wastewater according to the present invention.
Illustration of the drawings:
1. a support leg; 2. an axial flow circulation pump; 3. a reactor; 4. a layer of particulate filler; 5. a compressed air distribution system; 6. and (4) a stirring paddle.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
(1) Injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value to 2, and carrying out acidification treatment;
(2) adjusting the temperature of the wastewater subjected to acid precipitation treatment to 40-60 ℃, pumping the wastewater into a comprehensive reaction system, wherein the comprehensive reaction system is coupled with an electro-catalytic component, a circulating system, a compressed air distribution system, a tail gas system and a stirring system, the wastewater stays in the comprehensive reaction system for 1-3 hours, and hydrogen peroxide and a DEG catalytic oxidation reactant are added in the reaction process;
(3) adjusting the pH value of the wastewater treated by the comprehensive reaction system to 7, and pumping the wastewater into a sedimentation tank for sedimentation;
(4) after the sedimentation is carried out in the sedimentation tank, the supernatant reaches the standard and is discharged to a discharge water tank, and the sludge in the sedimentation tank is intensively discharged into a sludge tank.
Example two
(1) Injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value to 5, and carrying out acid precipitation treatment;
(2) adjusting the temperature of the wastewater subjected to acid precipitation treatment to 40-60 ℃, pumping the wastewater into a comprehensive reaction system, wherein the comprehensive reaction system is coupled with an electro-catalytic component, a circulating system, a compressed air distribution system, a tail gas system and a stirring system, the wastewater stays in the comprehensive reaction system for 1-3 hours, and hydrogen peroxide and a DEG catalytic oxidation reactant are added in the reaction process;
(3) adjusting the pH value of the wastewater treated by the comprehensive reaction system to 9, and pumping the wastewater into a sedimentation tank for sedimentation;
(4) after the sedimentation is carried out in the sedimentation tank, the supernatant reaches the standard and is discharged to a discharge water tank, and the sludge in the sedimentation tank is intensively discharged into a sludge tank.
EXAMPLE III
(1) Injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value to 3, and carrying out acidification treatment;
(2) adjusting the temperature of the wastewater subjected to acid precipitation treatment to 40-60 ℃, pumping the wastewater into a comprehensive reaction system, wherein the comprehensive reaction system is coupled with an electro-catalysis component, a circulation system, a compressed air distribution system, a tail gas system and a stirring system, the wastewater stays in the comprehensive reaction system for 1-3 hours, and hydrogen peroxide and a DEG catalytic oxidation reactant are added in the reaction process;
(3) adjusting the pH value of the wastewater treated by the comprehensive reaction system to 7.5, and pumping the wastewater into a sedimentation tank for sedimentation;
(4) after the sedimentation is carried out in the sedimentation tank, the supernatant reaches the standard and is discharged to a discharge water tank, and the sludge in the sedimentation tank is intensively discharged into a sludge tank.
Example four
(1) Injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value to 4, and carrying out acid precipitation treatment;
(2) adjusting the temperature of the wastewater subjected to acid precipitation treatment to 40-60 ℃, pumping the wastewater into a comprehensive reaction system, wherein the comprehensive reaction system is coupled with an electro-catalytic component, a circulating system, a compressed air distribution system, a tail gas system and a stirring system, the wastewater stays in the comprehensive reaction system for 1-3 hours, and hydrogen peroxide and a DEG catalytic oxidation reactant are added in the reaction process;
(3) adjusting the pH value of the wastewater treated by the comprehensive reaction system to 8.5, and pumping the wastewater into a sedimentation tank for sedimentation;
(4) after the sedimentation is carried out in the sedimentation tank, the supernatant reaches the standard and is discharged to a discharge water tank, and the sludge in the sedimentation tank is intensively discharged into a sludge tank.
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 (10)
1. The antimony removal method for the printing and dyeing wastewater is characterized by comprising the following steps:
(1) injecting the wastewater in the wastewater tank into a pH adjusting tank, adjusting the pH value, and performing acidification treatment;
(2) adjusting the temperature of the wastewater subjected to the acid precipitation treatment to 40-60 ℃, and pumping the wastewater into a comprehensive reaction system, wherein the comprehensive reaction system is coupled with an electro-catalytic component, a circulating system, a compressed air distribution system, a tail gas system and a stirring system;
(3) adjusting the pH value of the wastewater treated by the comprehensive reaction system, and pumping the wastewater into a sedimentation tank for sedimentation;
(4) after the sedimentation is carried out in the sedimentation tank, the supernatant reaches the standard and is discharged to a discharge water tank, and the sludge in the sedimentation tank is intensively discharged into a sludge tank.
2. The method for removing antimony from printing and dyeing wastewater as claimed in claim 1, wherein in the step (2), the wastewater stays in the integrated reaction system for 1-3h, and hydrogen peroxide and a DEG catalytic oxidation reactant are added during the reaction.
3. The method for removing antimony from printing and dyeing wastewater as claimed in claim 1, wherein the pH value is adjusted to 2-5 in step (1), and the pH value is adjusted to 7-9 in step (3).
4. The method for removing antimony from printing and dyeing wastewater according to claim 1 or 3, characterized in that the pH value is adjusted to 3-4 in step (1), and the pH value is adjusted to 7.5-8.5 in step (3).
5. The method for removing antimony from printing and dyeing wastewater as claimed in claim 4, wherein the electrocatalytic component in the step (2) is operated under the action of electricity, and when the electrocatalytic component is operated, a positive-negative difference is generated between an external power supply and a module polar plate.
6. The method for removing antimony from printing and dyeing wastewater as claimed in claim 5, wherein the electrocatalytic component is connected with a reactor through a pipeline, the pipeline is provided with an axial flow circulating pump, the axial flow circulating pump is used for providing power for circulating reaction liquid during the reaction process, and the surface of the reactor is connected with a horizontal supporting surface through four legs.
7. The method for removing antimony from printing and dyeing wastewater as claimed in claim 6, wherein a stirring paddle is arranged at the top of the reactor, and the stirring paddle provides mixing action during the reaction process, so that the additional reagents such as hydrogen peroxide and DEG are better mixed with the solution.
8. The method for removing antimony from printing and dyeing wastewater as claimed in claim 1, wherein the compressed air distribution system provides oxygen required in the reaction process, and the air distribution system provides mixing power for the lower part of the reactor.
9. The method for removing antimony from printing and dyeing wastewater according to claim 1, characterized in that a particle filler layer is arranged in the tail gas system, and the component particles of the particle filler layer consist of 30-40% of activated carbon, 5-30% of iron series and 5-30% of nickel series.
10. The method for removing antimony from printing and dyeing wastewater according to claim 1, wherein the DEG catalytic oxidation reactant mainly comprises: c: 5% -30%, H: 5% -20%, O: 10-30% and other 5% -20%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188343A (en) * | 2017-08-01 | 2017-09-22 | 江苏八达科技股份有限公司 | Stibium-containing wastewater handling process |
| CN207537259U (en) * | 2017-09-27 | 2018-06-26 | 江苏八达科技股份有限公司 | A kind of stibium-containing wastewater processing system |
| CN109292956A (en) * | 2018-12-12 | 2019-02-01 | 佛山科学技术学院 | A kind of catalytic wet oxidation processing method of dye wastewater treatment |
| AU2020102195A4 (en) * | 2020-09-10 | 2020-10-22 | Suzhou Xiner Environmental Technology Co., Ltd. | Process for recycling alkali liquor and removing antimony through membrane treatment of alkali-minimization wastewater |
| CN215048905U (en) * | 2021-05-20 | 2021-12-07 | 江苏羟源环能科技有限公司 | Treatment system for electrocatalysis coupling ozone micro-aeration |
-
2022
- 2022-03-23 CN CN202210295021.5A patent/CN114605010A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188343A (en) * | 2017-08-01 | 2017-09-22 | 江苏八达科技股份有限公司 | Stibium-containing wastewater handling process |
| CN207537259U (en) * | 2017-09-27 | 2018-06-26 | 江苏八达科技股份有限公司 | A kind of stibium-containing wastewater processing system |
| CN109292956A (en) * | 2018-12-12 | 2019-02-01 | 佛山科学技术学院 | A kind of catalytic wet oxidation processing method of dye wastewater treatment |
| AU2020102195A4 (en) * | 2020-09-10 | 2020-10-22 | Suzhou Xiner Environmental Technology Co., Ltd. | Process for recycling alkali liquor and removing antimony through membrane treatment of alkali-minimization wastewater |
| CN215048905U (en) * | 2021-05-20 | 2021-12-07 | 江苏羟源环能科技有限公司 | Treatment system for electrocatalysis coupling ozone micro-aeration |
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