CN214437868U - Two-stage tandem type alkali washing treatment equipment for copper smelting waste gas - Google Patents
Two-stage tandem type alkali washing treatment equipment for copper smelting waste gas Download PDFInfo
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- CN214437868U CN214437868U CN202022693002.7U CN202022693002U CN214437868U CN 214437868 U CN214437868 U CN 214437868U CN 202022693002 U CN202022693002 U CN 202022693002U CN 214437868 U CN214437868 U CN 214437868U
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Abstract
The utility model discloses a two-stage serial-type alkali washing treatment equipment of waste gas is smelted to copper belongs to exhaust-gas treatment equipment technical field. The device comprises an electric dust collector, a primary alkali washing device, a secondary alkali washing device, a wastewater adjusting tank, an air flotation tank, a sedimentation tank and an adsorption filtration tank; the electric dust collector is sequentially connected with a primary alkali washing device and a secondary alkali washing device, the wastewater of the primary alkali washing device and the wastewater of the secondary alkali washing device are both connected to a wastewater adjusting tank, and the wastewater adjusting tank is sequentially connected with an air flotation tank, a sedimentation tank and an adsorption filtration tank. The two-stage tandem type alkaline washing replaces two-stage tandem type dilute acid washing to purify copper smelting waste gas, and polluted acid generated from a source is reduced, so that the waste residue amount of polluted acid treated by a chemical precipitation method is reduced, and the cost for stabilizing and disposing hazardous waste is reduced; after the waste gas is washed by two stages of alkali, sulfur and arsenic substances in the waste water are separated by an air floatation method and a regeneration liquid precipitation method, so that secondary pollution caused by the fact that arsenic enters sludge is avoided, and the arsenic can be recycled.
Description
Technical Field
The utility model relates to a two-stage serial-type alkali wash treatment facility of waste gas is smelted to copper belongs to exhaust-gas treatment equipment technical field.
Background
The copper smelting plant carries out electrostatic dust collection and two-stage dilute acid washing purification on the flue waste gas, the purified sulfur dioxide purified gas is used for preparing sulfuric acid, and a large amount of waste acid can be generated in the process. At present, a smelting plant performs mixed treatment on waste acid generated in a two-stage dilute acid washing process, waste acid leaked from an acid making system, waste water discharged from a cyclic sodium sulfate collection unit and waste water in a dilute and precious workshop, and because the mixed waste liquid (waste acid) contains high heavy metal ions such as copper, arsenic and the like and has complex components, the recycling is difficult to realize. At present, the treatment process of mixed waste liquid (waste acid) in the copper smelting industry mainly adopts a sulfide precipitation method, a neutralization precipitation method, a flocculation precipitation method, a ferrite method and the like, and is mainly the comprehensive application of a plurality of treatment modes; however, because a large amount of chemical agents are added in the chemical precipitation method, the process has the operation problems of extremely large amount of slag, difficult slag and sludge dehydration, high hazardous waste stabilization treatment cost, serious equipment corrosion and scaling and the like. Therefore, a new waste gas treatment process for copper smelting plants needs to be developed, and the problems are solved by quantifying the sewage and realizing the recycling of harmful substances.
Disclosure of Invention
The utility model discloses the technical problem that will solve lies in: provides two-stage tandem type alkali washing treatment equipment for copper smelting waste gas, which solves the problems.
The utility model discloses the technical problem that will solve takes following technical scheme to realize:
a two-stage tandem type alkaline washing treatment device for copper smelting waste gas comprises an electric dust collector, a primary alkaline washing device, a secondary alkaline washing device, a waste water adjusting tank, an air flotation tank, a sedimentation tank and an adsorption filtering tank;
the electric dust collector is sequentially connected with a primary alkali washing device and a secondary alkali washing device, the waste water of the primary alkali washing device and the secondary alkali washing device is connected to a waste water regulating tank, and the waste water regulating tank is sequentially connected with an air floatation tank, a sedimentation tank and an adsorption filtration tank;
the sulfur separated from the air floatation tank is connected to refining equipment;
and the sediment in the sedimentation tank is connected to elutriation equipment.
As a preferred example, sodium sulfide for alkaline cleaning is arranged in the primary alkaline cleaning equipment.
As a preferred example, the secondary alkaline washing device is internally provided with sodium hydroxide for alkaline washing.
As a preferred example, the elutriation equipment adopts quicklime water elutriation equipment.
The utility model has the advantages that:
(1) the two-stage tandem type alkaline washing replaces two-stage tandem type dilute acid washing to purify copper smelting waste gas, and polluted acid generated from a source is reduced, so that the waste residue amount of polluted acid treated by a chemical precipitation method is reduced, and the cost for stabilizing and disposing hazardous waste is reduced;
(2) after the waste gas is washed by two stages of alkali, sulfur and arsenic substances in the waste water are separated by an air floatation method and a regeneration liquid precipitation method, so that secondary pollution caused by the arsenic entering sludge is avoided, the arsenic can be recycled, and finally, the sodium salt in the washing waste water can be industrially applied after being subjected to quality-based crystallization;
(3) the method has the characteristics of sewage acidification and waste gas recycling, solves the operation problems of great slag amount, difficult slag sludge dehydration, high hazardous waste stabilization treatment cost, serious equipment corrosion and scaling and the like after the waste gas treatment of the existing copper smelting plant, and is suitable for the treatment of the waste gas of the copper smelting plant.
Drawings
Fig. 1 is a schematic view of the connection structure of each device in the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.
As shown in figure 1, the two-stage tandem type alkaline washing treatment equipment for copper smelting waste gas comprises an electric dust collector, a primary alkaline washing device, a secondary alkaline washing device, a waste water adjusting tank, an air floatation tank, a sedimentation tank and an adsorption filtration tank;
the electric dust collector is sequentially connected with a primary alkali washing device and a secondary alkali washing device, the waste water of the primary alkali washing device and the secondary alkali washing device is connected to a waste water regulating tank, and the waste water regulating tank is sequentially connected with an air floatation tank, a sedimentation tank and an adsorption filtration tank;
introducing sulfur separated from the air floatation tank into refining equipment; and (4) connecting the sediment in the sedimentation tank to elutriation equipment.
Refining equipment for refining the sulfur and elutriation equipment for elutriating the precipitate are the existing commercially available equipment; the primary alkali washing equipment and the secondary alkali washing equipment adopt the existing commercial alkali washing tower equipment.
And the adsorption matrix regeneration liquid of the adsorption filtration tank is connected into a regeneration liquid sedimentation tank.
Sodium sulfide for alkali cleaning is arranged in the primary alkali cleaning equipment.
And sodium hydroxide for alkali cleaning is arranged in the secondary alkali cleaning equipment.
The elutriation equipment adopts quicklime water elutriation equipment.
Calcium chloride which reacts with the regenerated liquid of the adsorption matrix is arranged in the regenerated liquid sedimentation tank.
The working principle is as follows: the smelting waste gas is dedusted by an electric precipitator, flue ash is separated from gas, the gas is sequentially connected to a first-stage alkali washing device (sodium sulfide) and a second-stage alkali washing device (sodium hydroxide) for alkali washing twice, and the purified sulfur dioxide gas is used for preparing sulfuric acid;
washing wastewater generated by a primary alkali washing device (sodium sulfide) and a secondary alkali washing device (sodium hydroxide) sequentially passes through a wastewater adjusting tank, an air flotation tank, a sedimentation tank and an adsorption filtration tank, the wastewater enters the air flotation tank after being subjected to water quality and water quantity adjustment in the wastewater adjusting tank, sulfur is separated from the air flotation tank through an air flotation method, and the sulfur is treated by a refining device to obtain high-purity elemental sulfur; then the wastewater enters a sedimentation tank, and the precipitate separated by sedimentation is elutriated by quicklime water elutriation equipment to obtain calcium arsenate; and finally, the wastewater enters an adsorption filtration tank, sodium salt in the washing wastewater is subjected to fractional crystallization to obtain sodium sulfate, sodium sulfite and sodium chloride, fluoride ions in the wastewater are removed by adsorption of alumina or resin, and calcium chloride is added into the adsorption matrix regeneration wastewater in the adsorption filtration tank to generate calcium fluoride precipitate.
It has the following advantages:
(1) the two-stage tandem type alkaline washing replaces two-stage tandem type dilute acid washing to purify copper smelting waste gas, and polluted acid generated from a source is reduced, so that the waste residue amount of polluted acid treated by a chemical precipitation method is reduced, and the cost for stabilizing and disposing hazardous waste is reduced;
(2) after the waste gas is washed by two stages of alkali, sulfur and arsenic substances in the waste water are separated by an air floatation method and a regeneration liquid precipitation method, so that secondary pollution caused by the arsenic entering sludge is avoided, the arsenic can be recycled, and finally, the sodium salt in the washing waste water can be industrially applied after being subjected to quality-based crystallization;
(3) the method has the characteristics of sewage acidification and waste gas recycling, solves the operation problems of great slag amount, difficult slag sludge dehydration, high hazardous waste stabilization treatment cost, serious equipment corrosion and scaling and the like after the waste gas treatment of the existing copper smelting plant, and is suitable for the treatment of the waste gas of the copper smelting plant.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A two-stage tandem type alkaline washing treatment device for copper smelting waste gas is characterized by comprising an electric dust collector, a primary alkaline washing device, a secondary alkaline washing device, a waste water adjusting tank, an air floatation tank, a sedimentation tank and an adsorption filtration tank;
the electric dust collector is sequentially connected with a primary alkali washing device and a secondary alkali washing device, the waste water of the primary alkali washing device and the secondary alkali washing device is connected to a waste water regulating tank, and the waste water regulating tank is sequentially connected with an air floatation tank, a sedimentation tank and an adsorption filtration tank;
the sulfur separated from the air floatation tank is connected to refining equipment;
and the sediment in the sedimentation tank is connected to elutriation equipment.
2. The two-stage series alkali washing treatment equipment for the copper smelting waste gas according to claim 1, wherein sodium sulfide for alkali washing is arranged in the primary alkali washing equipment.
3. The two-stage series alkali washing treatment equipment for the copper smelting waste gas according to claim 1, wherein sodium hydroxide for alkali washing is arranged in the secondary alkali washing equipment.
4. The two-stage series alkali washing treatment equipment for the copper smelting waste gas according to claim 1, wherein the elutriation equipment adopts quicklime water elutriation equipment.
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| CN202022693002.7U CN214437868U (en) | 2020-11-19 | 2020-11-19 | Two-stage tandem type alkali washing treatment equipment for copper smelting waste gas |
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| CN202022693002.7U CN214437868U (en) | 2020-11-19 | 2020-11-19 | Two-stage tandem type alkali washing treatment equipment for copper smelting waste gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602305A (en) * | 2022-03-10 | 2022-06-10 | 宁波市和明瑞电器有限公司 | Aluminum oxidation waste gas and wastewater treatment system and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602305A (en) * | 2022-03-10 | 2022-06-10 | 宁波市和明瑞电器有限公司 | Aluminum oxidation waste gas and wastewater treatment system and application method thereof |
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