CN112299594B - Integrated device and method for pretreating copper ammonia wastewater - Google Patents
Integrated device and method for pretreating copper ammonia wastewater Download PDFInfo
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- CN112299594B CN112299594B CN202011072348.3A CN202011072348A CN112299594B CN 112299594 B CN112299594 B CN 112299594B CN 202011072348 A CN202011072348 A CN 202011072348A CN 112299594 B CN112299594 B CN 112299594B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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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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- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/24—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
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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- C02F2101/101—Sulfur compounds
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C02F2301/00—General aspects of water treatment
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Abstract
An integrated device and a method for pretreating copper ammonia wastewater belong to the technical field of wastewater treatment. The wastewater enters the first stripping chamber, scum is formed by pollutants with lower density and fine bubbles generated by aeration, and meanwhile, part of ammonia nitrogen in the wastewater is stripped out of the water surface. And (3) the wastewater enters a vulcanization chamber, the pH value of the wastewater is adjusted, and sodium sulfide is added to perform a chemical reaction to generate copper sulfide. And the waste water after reaction enters a copper removing chamber, copper sulfide with large particles and large specific gravity sinks to the lower part of the copper removing chamber under the action of gravity, and the copper sulfide with small particles is mixed with a flotation agent and adhered to form copper sulfide scum through bubbles blown out by aeration. The wastewater after precipitation and flotation enters a second stripping chamber, the pH value of the wastewater is adjusted, and NH in the wastewater is blown by air blown by aeration3And blowing out the hydrogen sulfide gas in the wastewater from the water surface. And the blown wastewater enters the desulfurization chamber, the elemental sulfur sinks to the lower part of the desulfurization chamber under the action of gravity, and the wastewater is filtered by the filter material and then is discharged through the overflow weir.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an integrated device and a method for pretreating copper ammonia wastewater.
Background
The copper ammonia wastewater mainly comes from industrial production, including wastewater discharged by industries such as metal smelting, printed circuit boards and the like. The copper ammonia wastewater contains copper and ammonia nitrogen, and has the pollution of the copper and the ammonia nitrogen, so that the copper ammonia wastewater is extremely harmful. Although copper is an essential trace element in human body and plays an important role in hematopoiesis, cell division, certain enzyme activities and endocrine, excessive copper can cause diseases such as senile dementia, liver cirrhosis, nerve injury and the like, copper can enter blood serum to cause hemolysis, and glutathione reductase can be inhibited to reduce the content of the copper. Ammonia nitrogen is a nutrient substance of microorganisms, and can cause eutrophication of water bodies and harm water organisms due to overhigh concentration, wherein the toxicity of free ammonia is dozens of times of that of amine. Meanwhile, ammonia nitrogen has reducibility, so that the ammonia nitrogen can be converted into nitrite in a water environment under certain conditions, and nitrite reacts with protein to generate a strong carcinogenic substance nitrosamine, so that the nitrite is harmful to human bodies.
Ammonia evaporation is used for removing ammonia nitrogen in copper ammonia wastewater, and wastewater with little water and high copper ammonia content can be treated generally; the method for removing copper and ammonia simultaneously has the problem of high cost; while the microbiological method can only aim at the copper ammonia wastewater with lower concentration. Therefore, it is necessary to conduct an intensive study on the treatment process of copper ammonia wastewater.
The invention patent of two-stage method for rapidly removing copper ions in copper ammonia complexing wastewater (202010166365.7) discloses a two-stage method for rapidly removing copper ions in copper ammonia complexing wastewater. The method comprises the following steps: adding alkali into the copper-ammonia complexing wastewater, adjusting the wastewater to a proper pH value, performing primary complexing precipitation to remove part of copper, adding a hydroxamic acid type separating agent into the obtained copper-containing suspension, uniformly mixing, standing, and performing secondary deep chelation copper removal and flocculation sedimentation separation; thirdly, the settled bottom flow is high-content copper sludge, and the high-purity copper hydroxide powder is formed after the bottom flow is taken out and dehydrated and dried; and overflowing the filtrate and the supernatant into a subsequent deamination system. This patent only considers the removal of copper ions.
The invention discloses a concentrated acid fractionation treatment process for copper ammonia concentrated solution of a circuit board (201611257788.X), which comprises the following steps: adding concentrated sulfuric acid into a reaction tank, uniformly and slowly adding concentrated copper ammonia wastewater into the concentrated sulfuric acid in the reaction tank, mixing the added concentrated copper ammonia wastewater with the concentrated sulfuric acid to generate a strong bumping reaction, greatly increasing the temperature and pressure of the reaction tank, evaporating and fractionating water and ammonia in concentrated solution after the temperature is increased, and then condensing to form ammonia water; with the addition of the concentrated copper ammonia wastewater, copper sulfate crystals are continuously generated in the reaction liquid, and with the reaction, the concentrated sulfuric acid is changed into diluted acid copper wastewater, so that the reaction is completed. The invention has short reaction process and can recover the copper sulfate crystal. However, the patent is complex in operation and high in treatment cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problem of treatment of the copper ammonia wastewater, an integrated device and a method for pretreatment of the copper ammonia wastewater are provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an integrated device for pretreating copper ammonia wastewater comprises a first stripping chamber 1, a vulcanizing chamber 2, a copper removing chamber 3, a second stripping chamber 4 and a desulfurizing chamber 5;
the first air stripping chamber 1 is provided with a water inlet pipe 1-1, the middle lower part of the first air stripping chamber 1 is provided with a first aeration disc 1-2, a water distribution pipe 1-3 is arranged above the first aeration disc 1-2, the water distribution pipe 1-3 is provided with a horizontal radiation water outlet, the water distribution pipe 1-3 is connected with the water inlet pipe 1-1, and the first aeration disc 1-2 is connected with a first air blower 1-4 outside the first air stripping chamber 1 through a pipeline. The upper part of the first blow-off chamber 1 is provided with a first scraper plate 1-5 and a first scum groove 1-6;
further, the water distribution pipes 1 to 3 are formed in a concentric circle shape or a cross shape for better wastewater treatment.
Further, the first aeration disc 1-2 is a microporous aeration disc uniformly provided with micropores.
Furthermore, the volume ratio of the air blown out of the first aeration disc 1-2 to the wastewater is 2000-4000: 1.
A flow baffle plate 2-1 is arranged between the first stripping chamber 1 and the vulcanizing chamber 2, a corner of 45 degrees is arranged at the lower part of the flow baffle plate 2-1, and the corner turns to one side of the vulcanizing chamber 2 to ensure that the wastewater in the first stripping chamber 1 flows into the bottom of the vulcanizing chamber 2; the vulcanizing chamber 2 is provided with a vulcanizing agent adding meter 2-2 and a pH value regulator 2-3, and the middle lower part of the vulcanizing chamber is provided with a vulcanizing chamber stirrer 2-4.
Preferably, the vulcanizing agent added by the vulcanizing agent adding meter 2-2 is sodium sulfide solution. The molar ratio of copper ions to sulfur ions in the wastewater is 1: 1.5-2.
Further, the pH adjustor 2-3 adjusts the pH of the wastewater by adding hydrochloric acid, sulfuric acid, or a sodium hydroxide solution.
Further, the pH value of the wastewater is adjusted to 9-11 by the pH value adjuster 2-3.
A first guide plate 3-1 is arranged between the vulcanizing chamber 2 and the copper removing chamber 3, the first guide plate 3-1 and the inner wall of the copper ammonia wastewater pretreatment integrated device form a water flow channel which is used as wastewater to enter the copper removing chamber 3, the wastewater in the vulcanizing chamber 2 is ensured to overflow from the upper part and flow into the bottom of the copper removing chamber 3 through the water flow channel. A second aeration disc 3-2 is arranged at the middle lower part of the copper removing chamber 3, and the second aeration disc 3-2 is connected with a second blower 3-3 except the copper removing chamber 3 through a pipeline. The upper part of the second aeration disc 3-2 is provided with a flotation agent adding meter 3-4. The upper part of one side of the second aeration disc 3-2 close to the second stripping chamber 4 is also provided with a three-phase separator 3-5. The upper part of the copper removing chamber 3 is provided with a second scraper 3-6 and a second scum groove 3-7, the bottom of the copper removing chamber 3 is designed into a conical structure, and the lower part of the conical structure is provided with a copper removing chamber discharge valve 3-8.
Further, the second aeration disc 3-2 is a microporous aeration disc uniformly provided with micropores.
Furthermore, the volume ratio of the air blown out of the second aeration disc 3-2 to the wastewater is 1000-3000: 1.
Further, the three-phase separator 3-5 comprises a triangular projection arranged on the wall of the copper removing chamber 3 and an inclined flap arranged at the upper part of the triangular projection. A water flow channel is arranged between the triangular protrusion and the inclined folded plate at the upper part of the triangular protrusion, bubbles blown out of the second aeration disc 3-2 move upwards under the action of buoyancy, the bubbles can only rise to the second scraping plate 3-6 due to the blockage of the triangular protrusion and the inclined folded plate at the upper part of the triangular protrusion, and wastewater flows out of the copper removing chamber 3 through the water flow channel between the triangular protrusion and the inclined folded plate at the upper part of the triangular protrusion.
Preferably, the flotation agent added by the flotation agent adding meter 3-4 is sodium isoamyl xanthate, potassium isoamyl xanthate or ammonium butylamide nigride. The molar ratio of copper ions in the wastewater to the flotation agent is 1: 1-2.
And a second guide plate 4-1 is arranged between the copper removing chamber 3 and the second stripping chamber 4, and the second guide plate 4-1 and the inner wall of the copper ammonia wastewater pretreatment integrated device form a water flow channel for wastewater to enter the second stripping chamber, so that the wastewater in the vulcanizing chamber 3 is ensured to overflow from the upper part and flow into the bottom of the second stripping chamber 4 through the water flow channel. A third aeration disc 4-2 is arranged at the lower part of the second air stripping chamber 4, the third aeration disc 4-2 is connected with a third air blower 4-3 outside the second air stripping chamber 4 through a pipeline, and an alkali liquor adding meter 4-4 is arranged at the lower part of the third aeration disc 4-2.
Further, the third aeration disc 4-2 is a microporous aeration disc uniformly provided with micropores.
Preferably, the alkali liquor added by the alkali liquor adding meter 4-4 is sodium hydroxide solution.
Further, the pH value of the wastewater is adjusted to 11-13 by the alkali liquor added by the alkali liquor adding meter 4-4.
Furthermore, the volume ratio of the air blown out of the third aeration disc 4-2 to the wastewater is 2000-6000: 1.
A partition plate 5-1 is arranged between the second stripping chamber 4 and the desulfurization chamber 5, and a water flow port 5-2 is arranged on the partition plate 5-1. The baffle 5-1 at the lower part of the water flow port 5-2 and the upper part of the third aeration disc 4-2 is provided with an air guide plate 5-3. The upper part of the desulfurization chamber 5 is provided with a filter material 5-4. The bottom of the desulfurization chamber 5 is designed into a conical structure, and the lower part of the conical structure is provided with a desulfurization chamber discharge valve 5-5. The upper part of the desulfurization chamber 5 is provided with an overflow weir 5-6, the overflow weir 5-6 is connected with a water outlet pipe, and water discharged by the water outlet pipe enters a sewage treatment plant for further treatment.
Preferably, the filter material 5-4 is a plastic fiber filter material, and the backwashing is carried out after the filtering speed of the filter material 5-4 is reduced, so as to recover the elemental sulfur.
The method for treating the wastewater by adopting the integrated device for pretreating the copper ammonia wastewater comprises the following steps:
firstly, wastewater enters a first air stripping chamber 1 through a water inlet pipe 1-1 and a water distribution pipe 1-3, air blown out by a first aeration disc 1-2 positioned below the water distribution pipe 1-3 generates a large amount of fine bubbles, the bubbles and pollutants with lower density form scum which rises to the water surface under the action of buoyancy, and the scum is discharged through a first scraper plate 1-5 and a first scum groove 1-6. Part of ammonia nitrogen in the wastewater is blown off the water surface.
Secondly, the wastewater enters a vulcanizing chamber 2, a pH value regulator 2-3 regulates the pH value of the wastewater to 9-11 by adding hydrochloric acid, sulfuric acid or sodium hydroxide solution, a vulcanizing agent adding meter 2-2 adds a vulcanizing agent, a vulcanizing chamber stirrer 2-4 stirs the wastewater, and the wastewater undergoes a chemical reaction to generate copper sulfide.
Thirdly, the waste water after reaction enters the copper removing chamber 3 through a water flow channel between the vulcanizing chamber 2 and the copper removing chamber 3, part of copper sulfide with large particles and large specific gravity sinks to the lower part of the copper removing chamber 3 under the action of gravity, and the waste water is discharged through a discharge valve 3-8 of the copper removing chamber at the bottom and is dehydrated and recycled. And part of copper sulfide with small particles is mixed with the flotation agent and is adhered to bubbles blown out by the second aeration disc 3-2 to form copper sulfide scum, and the copper sulfide scum rises to the water surface under the action of buoyancy and is discharged through the second scraper 3-6 and the second scum groove 3-7, dewatered and recycled.
The wastewater after precipitation and flotation enters a second air stripping chamber 4 through a second guide plate 4-1, the pH value of the wastewater is adjusted to 11-13 by an alkali liquor adding meter 4-4, and NH in the wastewater is treated by air blown by a third aeration disc 4-23And blowing out the hydrogen sulfide gas in the wastewater from the water surface. The air blown out by the third aeration disc 4-2 oxidizes the sulfur ions in the wastewater into elemental sulfur.
Fifthly, the blown waste water enters the desulfurization chamber 5 through the water flow port 5-2, partial elemental sulfur sinks to the lower part of the desulfurization chamber 5 under the action of gravity, the waste water is discharged, dehydrated and recycled through the discharge valve 5-5 of the desulfurization chamber at the bottom, the waste water is filtered by the filter material 5-4 and then discharged through the overflow weir 5-6 and the water outlet pipe, and the water discharged by the water outlet pipe is further treated. When the filtering speed of the filtering material 5-4 is reduced, the water inlet pipe 1-1 stops feeding water, the integrated device for pretreating the copper ammonia wastewater is emptied, the filtering material 5-4 is backwashed, and the elemental sulfur on the filtering material 5-4 is discharged through a discharging valve 5-5 of a desulfurization chamber, dehydrated and recycled.
The invention has the beneficial effects that: firstly, carrying out aeration air flotation on the wastewater to remove slag and blow off part of ammonia nitrogen, and removing copper ions in the wastewater by utilizing the characteristic that copper sulfide is insoluble in water through precipitation and air flotation; further removing ammonia nitrogen in the wastewater and sulfur ions in the oxidized water by using a stripping method, and then precipitating and filtering to remove sulfur. The integrated device for pretreating the copper ammonia wastewater has the advantages of small occupied area, simple structure, low manufacturing cost, simple operation and convenient maintenance; the energy consumption is low, and the treatment effect on the wastewater is better.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of an integrated device for pretreating copper ammonia wastewater according to an embodiment of the invention;
in fig. 1:1 a first blowing-out chamber, 1-1 a water inlet pipe, 1-2 a first aeration disc, 1-3 a water distributor, 1-4 a first air blower, 1-5 a first scraper blade, 1-6 a first scum trough, 2 a vulcanizing chamber, 2-1 a baffle plate, 2-2 a vulcanizing agent adding meter, 2-3 a pH value regulator, 2-4 a vulcanizing chamber stirrer, 3 a copper removing chamber, 3-1 a first guide plate, 3-2 a second aeration disc, 3-3 a second air blower, 3-4 a flotation agent adding meter, 3-5 a three-phase separator, 3-6 a second scraper blade, 3-7 a second scum trough, 3-8 a copper removing chamber discharge valve, 4 a second blowing-out chamber, 4-1 a second guide plate, 4-2 a third aeration disc, 4-3 a third air blower, 4-4 an alkali liquor adding meter, 5 desulfurization chamber, 5-1 partition plate, 5-2 water flow port, 5-3 air guide plate, 5-4 filter material, 5-5 desulfurization chamber discharge valve and 5-6 overflow weir.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Examples
The integrated device for pretreating copper ammonia wastewater disclosed by the invention as shown in fig. 1 comprises a first stripping chamber 1, a vulcanizing chamber 2, a copper removing chamber 3, a second stripping chamber 4 and a desulfurization chamber 5.
The first air stripping chamber 1 is provided with a water inlet pipe 1-1, the middle lower part of the first air stripping chamber 1 is provided with a first aeration disc 1-2, a water distribution pipe 1-3 is arranged above the first aeration disc 1-2, the water distribution pipe 1-3 is connected with the water inlet pipe 1-1, and the first aeration disc 1-2 is connected with a first air blower 1-4 outside the first air stripping chamber 1 through a pipeline. The upper part of the first blow-off chamber 1 is provided with a first scraper plate 1-5 and a first scum groove 1-6. For better wastewater treatment effect, the water distribution pipes 1-3 are arranged in a concentric circle shape or a cross shape, and the water distribution pipes 1-3 are provided with horizontal radiation water outlets.
Further, the first aeration disc 1-2 is a microporous aeration disc uniformly provided with micropores.
Further, the volume ratio of the air blown out by the first aeration disc 1-2 to the wastewater is 2000: 1.
A flow baffle plate 2-1 is arranged between the first stripping chamber 1 and the vulcanizing chamber 2, a corner of 45 degrees is arranged at the lower part of the flow baffle plate 2-1, and the corner turns to one side of the vulcanizing chamber 2 to ensure that the wastewater in the first stripping chamber 1 flows into the bottom of the vulcanizing chamber 2; the vulcanizing chamber 2 is provided with a vulcanizing agent adding meter 2-2 and a pH value regulator 2-3, and the middle lower part of the vulcanizing chamber is provided with a vulcanizing chamber stirrer 2-4.
Preferably, the vulcanizing agent added by the vulcanizing agent adding meter 2-2 is sodium sulfide solution. The molar ratio of copper ions to sulfur ions in the wastewater was 1: 1.5.
Further, the pH adjustor 2-3 adjusts the pH of the wastewater to 11 by adding hydrochloric acid and a sodium hydroxide solution.
A first guide plate 3-1 is arranged between the vulcanizing chamber 2 and the copper removing chamber 3, the first guide plate 3-1 and the inner wall of the copper ammonia wastewater pretreatment integrated device form a water flow channel which is used as wastewater to enter the copper removing chamber 3, the wastewater in the vulcanizing chamber 2 is ensured to overflow from the upper part and flow into the bottom of the copper removing chamber 3 through the water flow channel. A second aeration disc 3-2 is arranged at the middle lower part of the copper removing chamber 3, and the second aeration disc 3-2 is connected with a second blower 3-3 except the copper removing chamber 3 through a pipeline. The upper part of the second aeration disc 3-2 is provided with a flotation agent adding meter 3-4. The upper part of one side of the second aeration disc 3-2 close to the second stripping chamber 4 is also provided with a three-phase separator 3-5. The upper part of the copper removing chamber 3 is provided with a second scraping plate 3-6 and a second scum groove 3-7. The bottom of the copper removing chamber 3 is designed into a conical structure, and the lower part of the conical structure is provided with a discharge valve 3-8 of the copper removing chamber.
Further, the second aeration disc 3-2 is a microporous aeration disc uniformly provided with micropores.
Further, the volume ratio of the blown air to the wastewater of the second aeration tray 3-2 is 1000: 1.
Preferably, the flotation agent added by the flotation agent adding meter 3-4 is sodium isoamyl xanthate. The molar ratio of copper ions to the flotation agent in the wastewater is 1: 2.
Further, the three-phase separator 3-5 comprises a triangular projection arranged on the wall of the copper removing chamber 3 and an inclined flap arranged at the upper part of the triangular projection. A water flow channel is arranged between the triangular protrusion and the inclined folded plate at the upper part of the triangular protrusion, bubbles blown out of the second aeration disc 3-2 move upwards under the action of buoyancy, the bubbles can only rise to the second scraping plate 3-6 due to the blockage of the triangular protrusion and the inclined folded plate at the upper part of the triangular protrusion, and wastewater flows out of the copper removing chamber 3 through the water flow channel between the triangular protrusion and the inclined folded plate at the upper part of the triangular protrusion.
And a second guide plate 4-1 is arranged between the copper removing chamber 3 and the second stripping chamber 4, and the second guide plate 4-1 and the inner wall of the copper ammonia wastewater pretreatment integrated device form a water flow channel for wastewater to enter the second stripping chamber, so that the wastewater in the vulcanizing chamber 3 is ensured to overflow from the upper part and flow into the bottom of the second stripping chamber 4 through the water flow channel. The lower part of the second air stripping chamber 4 is provided with a third aeration disc 4-2, the third aeration disc 4-2 is connected with a third air blower 4-3 outside the second air stripping chamber 4 through a pipeline, and the third aeration disc 4-2 is a microporous aeration disc uniformly provided with micropores. The lower part of the third aeration disc 4-2 is provided with an alkali liquor adding meter 4-4.
Preferably, the alkali liquor added by the alkali liquor adding meter 4-4 is sodium hydroxide solution.
Further, the pH value of the wastewater is adjusted to 13 by the alkali liquor added by the alkali liquor adding meter 4-4.
Further, the volume ratio of the air blown out by the third aeration disc 4-2 to the wastewater is 4000: 1.
A partition plate 5-1 is arranged between the second stripping chamber 4 and the desulfurization chamber 5, and a water flow port 5-2 is arranged on the partition plate 5-1. The baffle 5-1 at the lower part of the water flow port 5-2 and the upper part of the third aeration disc 4-2 is provided with an air guide plate 5-3. The upper part of the desulfurization chamber 5 is provided with a filter material 5-4. The bottom of the desulfurization chamber 5 is designed into a conical structure, and the lower part of the conical structure is provided with a desulfurization chamber discharge valve 5-5. The upper part of the desulfurization chamber 5 is provided with an overflow weir 5-6, the overflow weir 5-6 is connected with a water outlet pipe, and water discharged by the water outlet pipe enters a sewage treatment plant for further treatment.
Preferably, the filter material 5-4 is a plastic fiber filter material, and the backwashing is carried out after the filtering speed of the filter material 5-4 is reduced, so as to recover the elemental sulfur.
The method for treating the wastewater by adopting the integrated device for pretreating the copper ammonia wastewater comprises the following steps:
firstly, wastewater enters a first air stripping chamber 1 through a water inlet pipe 1-1 and a water distribution pipe 1-3, air blown out by a first aeration disc 1-2 positioned below the water distribution pipe 1-3 generates a large amount of fine bubbles, the bubbles and pollutants with lower density form scum which rises to the water surface under the action of buoyancy, and the scum is discharged through a first scraper plate 1-5 and a first scum groove 1-6. Part of ammonia nitrogen in the wastewater is blown off the water surface.
Secondly, the wastewater enters a vulcanizing chamber 2, a pH value regulator 2-3 regulates the pH value of the wastewater to be 11 by adding hydrochloric acid and sodium hydroxide solution, a vulcanizing agent adding meter 2-2 adds sodium sulfide solution, a vulcanizing chamber stirrer 2-4 stirs the wastewater, and the wastewater undergoes a chemical reaction to generate copper sulfide.
Thirdly, the waste water after reaction enters the copper removing chamber 3 through a water flow channel between the vulcanizing chamber 2 and the copper removing chamber 3, part of copper sulfide with large particles and large specific gravity sinks to the lower part of the copper removing chamber 3 under the action of gravity, and the waste water is discharged through a discharge valve 3-8 of the copper removing chamber at the bottom and is dehydrated and recycled. And part of copper sulfide with small particles is mixed with the flotation agent and is adhered to bubbles blown out by the second aeration disc 3-2 to form copper sulfide scum, and the copper sulfide scum rises to the water surface under the action of buoyancy and is discharged through the second scraper 3-6 and the second scum groove 3-7, dewatered and recycled.
The wastewater after precipitation and flotation enters a second stripping chamber 4 through a second guide plate 4-1, the pH value of the wastewater is adjusted to 13 by an alkali liquor adding meter 4-4, and NH in the wastewater is treated by air blown by a third aeration disc 4-23And blowing out the hydrogen sulfide gas in the wastewater from the water surface. The air blown out by the third aeration disc 4-2 oxidizes the sulfur ions in the wastewater into elemental sulfur.
Fifthly, the blown waste water enters the desulfurization chamber 5 through the water flow port 5-2, partial elemental sulfur sinks to the lower part of the desulfurization chamber 5 under the action of gravity, the waste water is discharged, dehydrated and recycled through the discharge valve 5-5 of the desulfurization chamber at the bottom, the waste water is filtered by the filter material 5-4 and then discharged through the overflow weir 5-6 and the water outlet pipe, and the water discharged by the water outlet pipe is further treated. When the filtering speed of the filtering material 5-4 is reduced, the water inlet pipe 1-1 stops feeding water, the integrated device for pretreating the copper ammonia wastewater is emptied, the filtering material 5-4 is backwashed, and the elemental sulfur on the filtering material 5-4 is discharged through a discharging valve 5-5 of a desulfurization chamber, dehydrated and recycled.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and 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 (10)
1. The integrated device for pretreating the copper ammonia wastewater is characterized by comprising a first stripping chamber (1), a vulcanizing chamber (2), a copper removing chamber (3), a second stripping chamber (4) and a desulfurization chamber (5);
the first air-stripping chamber (1) is provided with a water inlet pipe (1-1), the middle lower part of the first air-stripping chamber (1) is provided with a first aeration disc (1-2), a water distribution pipe (1-3) is arranged above the first aeration disc (1-2), the water distribution pipe (1-3) is provided with a horizontal radiation water outlet, the water distribution pipe (1-3) is connected with the water inlet pipe (1-1), and the first aeration disc (1-2) is connected with a first air blower (1-4) outside the first air-stripping chamber (1) through a pipeline; the upper part of the first blow-off chamber (1) is provided with a first scraper (1-5) and a first scum groove (1-6);
a flow baffle plate (2-1) is arranged between the first stripping chamber (1) and the vulcanizing chamber (2), a corner of 45 degrees is arranged at the lower part of the flow baffle plate (2-1), and the corner turns to one side of the vulcanizing chamber (2) to ensure that the wastewater in the first stripping chamber (1) flows into the bottom of the vulcanizing chamber (2); the vulcanizing chamber (2) is provided with a vulcanizing agent adding meter (2-2) and a pH value regulator (2-3), and the middle lower part of the vulcanizing chamber is provided with a vulcanizing chamber stirrer (2-4);
a first guide plate (3-1) is arranged between the vulcanizing chamber (2) and the copper removing chamber (3), the first guide plate (3-1) and the inner wall of the copper ammonia wastewater pretreatment integrated device form a water flow channel which is used for enabling wastewater to enter the copper removing chamber (3), and the wastewater in the vulcanizing chamber (2) is ensured to overflow from the upper part and flow into the bottom of the copper removing chamber (3) through the water flow channel; a second aeration disc (3-2) is arranged at the middle lower part of the copper removing chamber (3), and the second aeration disc (3-2) is connected with a second blower (3-3) except the copper removing chamber (3) through a pipeline; the upper part of the second aeration disc (3-2) is provided with a flotation agent adding meter (3-4); the upper part of one side of the second aeration disc (3-2) close to the second stripping chamber (4) is also provided with a three-phase separator (3-5); the upper part of the copper removing chamber (3) is provided with a second scraper (3-6) and a second scum groove (3-7), the bottom of the copper removing chamber (3) is designed into a conical structure, and the lower part of the conical structure is provided with a discharge valve (3-8) of the copper removing chamber;
the three-phase separator (3-5) comprises a triangular bulge arranged on the wall of the copper removing chamber (3) and an inclined folded plate arranged at the upper part of the triangular bulge; a water flow channel is arranged between the triangular bulge and the inclined folded plate at the upper part of the triangular bulge, bubbles blown out from the second aeration disc (3-2) move upwards under the action of buoyancy, and can only rise to the second scraping plate (3-6) due to the blockage of the triangular bulge and the inclined folded plate at the upper part of the triangular bulge, and wastewater flows out of the copper removing chamber (3) through the water flow channel between the triangular bulge and the inclined folded plate at the upper part of the triangular bulge;
a second guide plate (4-1) is arranged between the copper removing chamber (3) and the second stripping chamber (4), the second guide plate (4-1) and the inner wall of the copper ammonia wastewater pretreatment integrated device form a water flow channel for wastewater to enter the second stripping chamber, so that the wastewater in the vulcanizing chamber (3) is ensured to overflow from the upper part and flow into the bottom of the second stripping chamber (4) through the water flow channel; a third aeration disc (4-2) is arranged at the lower part of the second stripping chamber (4), the third aeration disc (4-2) is connected with a third air blower (4-3) outside the second stripping chamber (4) through a pipeline, and an alkali liquor adding meter (4-4) is arranged at the lower part of the third aeration disc (4-2);
a partition plate (5-1) is arranged between the second stripping chamber (4) and the desulfurization chamber (5), and a water flow port (5-2) is formed in the partition plate (5-1); the lower part of the water flow port (5-2) and the partition board (5-1) at the upper part of the third aeration disc (4-2) are provided with air guide plates (5-3); the upper part of the desulfurization chamber (5) is provided with a filter material (5-4); the bottom of the desulfurization chamber (5) is designed into a conical structure, and the lower part of the conical structure is provided with a desulfurization chamber discharge valve (5-5); the upper part of the desulfurization chamber (5) is provided with an overflow weir (5-6), the overflow weir (5-6) is connected with a water outlet pipe, and water discharged by the water outlet pipe enters a sewage treatment plant for further treatment.
2. The integrated device for pretreating copper ammonia wastewater according to claim 1, wherein the water distribution pipes (1-3) are arranged in a concentric circle shape or a cross shape.
3. The integrated device for pretreating copper ammonia wastewater according to claim 1, wherein the first aeration disc (1-2) is a microporous aeration disc uniformly provided with micropores; the volume ratio of the air blown out of the first aeration disc (1-2) to the wastewater is 2000-4000: 1.
4. The integrated device for pretreating copper ammonia wastewater according to claim 1, wherein the vulcanizing agent added by the vulcanizing agent adding meter (2-2) is a sodium sulfide solution; the molar ratio of copper ions to sulfur ions in the wastewater is 1: 1.5-2.
5. The integrated copper ammonia wastewater pretreatment device according to claim 1, wherein the pH value adjuster (2-3) adjusts the pH value of wastewater by adding hydrochloric acid, sulfuric acid or sodium hydroxide solution; the pH value of the wastewater is adjusted to 9-11 by the pH value adjuster (2-3).
6. The integrated copper ammonia wastewater pretreatment device according to claim 1, wherein the second aeration disk (3-2) is a microporous aeration disk uniformly provided with micropores; furthermore, the volume ratio of the air blown out of the second aeration disc (3-2) to the wastewater is 1000-3000: 1.
7. The integrated device for copper ammonia wastewater pretreatment according to claim 1, wherein the flotation agent added by the flotation agent adding meter (3-4) is sodium isoamyl xanthate, potassium isoamyl xanthate or ammonium nitrate black powder; the molar ratio of copper ions in the wastewater to the flotation agent is 1: 1-2.
8. The integrated copper ammonia wastewater pretreatment device according to claim 1, wherein the third aeration disk (4-2) is a microporous aeration disk uniformly provided with micropores; the volume ratio of the air blown out of the third aeration disc (4-2) to the wastewater is 2000-6000: 1.
9. The integrated device for pretreating copper ammonia wastewater according to claim 1, wherein the alkaline liquor added by the alkaline liquor adding meter (4-4) is sodium hydroxide solution; the alkali liquor added by the alkali liquor adding meter (4-4) is used for adjusting the pH value of the wastewater to 11-13; the filter material (5-4) is a plastic fiber filter material, and when the filtering speed of the filter material (5-4) is reduced, back washing is carried out to recover elemental sulfur.
10. The method for treating the wastewater by adopting the integrated device for pretreating the copper ammonia wastewater as claimed in any one of claims 1 to 9 is characterized by comprising the following steps of:
firstly, wastewater enters a first stripping chamber (1) through a water inlet pipe (1-1) and a water distribution pipe (1-3), air blown out by a first aeration disc (1-2) positioned below the water distribution pipe (1-3) generates a large amount of fine bubbles, the bubbles and pollutants with lower density form scum which rises to the water surface under the action of buoyancy, and the scum is discharged through a first scraper blade (1-5) and a first scum groove (1-6); part of ammonia nitrogen in the wastewater is blown off from the water surface;
secondly, the wastewater enters a vulcanizing chamber (2), a pH value regulator (2-3) regulates the pH value of the wastewater to be 9-11 by adding hydrochloric acid, sulfuric acid or sodium hydroxide solution, a vulcanizing agent adding meter (2-2) adds a vulcanizing agent, a vulcanizing chamber stirrer (2-4) stirs the wastewater, and the wastewater undergoes a chemical reaction to generate copper sulfide;
thirdly, the reacted waste water enters the copper removing chamber (3) through a water flow channel between the vulcanizing chamber (2) and the copper removing chamber (3), part of copper sulfide with large particles and large specific gravity sinks to the lower part of the copper removing chamber (3) under the action of gravity, and the waste water is discharged through a discharge valve (3-8) of the copper removing chamber at the bottom and is dehydrated and recycled; part of copper sulfide with small particles is mixed with a flotation agent and is adhered to bubbles blown out by the second aeration disc (3-2) to form copper sulfide scum, and the copper sulfide scum rises to the water surface under the action of buoyancy and is discharged through the second scraper (3-6) and the second scum trough (3-7) and is dehydrated and recycled;
fourthly, the wastewater after precipitation and flotation enters a second stripping chamber (4) through a second guide plate (4-1), the pH value of the wastewater is adjusted to 11-13 by an alkali liquor adding meter (4-4), and NH in the wastewater is treated by air blown by a third aeration disc (4-2)3Blowing out hydrogen sulfide gas in the wastewater from the water surface; the air blown out by the third aeration disc (4-2) oxidizes the sulfur ions in the wastewater into elemental sulfur;
fifthly, the blown-off wastewater enters a desulfurization chamber (5) through a water flow port (5-2), part of elemental sulfur sinks to the lower part of the desulfurization chamber (5) under the action of gravity, the elemental sulfur is discharged, dehydrated and recycled through a discharge valve (5-5) of the desulfurization chamber at the bottom, the wastewater is filtered by a filter material (5-4) and then discharged through an overflow weir (5-6) and a water outlet pipe, and the water discharged by the water outlet pipe is further treated; when the filtering speed of the filtering material (5-4) is reduced, the water inlet pipe (1-1) stops feeding water, the cuprammonia wastewater pretreatment integrated device is emptied, the filtering material (5-4) is backwashed, and elemental sulfur on the filtering material (5-4) is discharged through a discharging valve (5-5) of a desulfurization chamber, dehydrated and recycled.
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| CN116081680A (en) * | 2023-03-01 | 2023-05-09 | 广西象州汇智纳米科技有限公司 | Method for preparing pigment grade zinc sulfide by using byproduct sodium sulfide solution |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204918048U (en) * | 2015-09-02 | 2015-12-30 | 中国石油化工股份有限公司 | Ammonia nitrogen blows and takes off device |
| CN106673305A (en) * | 2016-12-23 | 2017-05-17 | 常州大学 | Strongly-acidic high-arsenic wastewater treatment integrated plant |
| CN109626623A (en) * | 2017-10-09 | 2019-04-16 | 上海集承环保技术有限公司 | A kind for the treatment of process of cupric and ammonia nitrogen waste water |
| CN109881009A (en) * | 2019-03-11 | 2019-06-14 | 江西理工大学 | A method of recycling copper from electron wastes |
| CN111499029A (en) * | 2020-03-11 | 2020-08-07 | 深圳清华大学研究院 | Two-stage method for quickly removing copper ions in copper ammonia complex wastewater |
| CN111530636A (en) * | 2020-05-09 | 2020-08-14 | 昆明理工大学 | Method for enhanced sulfuration flotation recovery of copper oxide ore by copper ammonia complex gradient activation |
-
2020
- 2020-10-09 CN CN202011072348.3A patent/CN112299594B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204918048U (en) * | 2015-09-02 | 2015-12-30 | 中国石油化工股份有限公司 | Ammonia nitrogen blows and takes off device |
| CN106673305A (en) * | 2016-12-23 | 2017-05-17 | 常州大学 | Strongly-acidic high-arsenic wastewater treatment integrated plant |
| CN109626623A (en) * | 2017-10-09 | 2019-04-16 | 上海集承环保技术有限公司 | A kind for the treatment of process of cupric and ammonia nitrogen waste water |
| CN109881009A (en) * | 2019-03-11 | 2019-06-14 | 江西理工大学 | A method of recycling copper from electron wastes |
| CN111499029A (en) * | 2020-03-11 | 2020-08-07 | 深圳清华大学研究院 | Two-stage method for quickly removing copper ions in copper ammonia complex wastewater |
| CN111530636A (en) * | 2020-05-09 | 2020-08-14 | 昆明理工大学 | Method for enhanced sulfuration flotation recovery of copper oxide ore by copper ammonia complex gradient activation |
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