CN210559747U - Industrial heavy metal sewage treatment system - Google Patents
Industrial heavy metal sewage treatment system Download PDFInfo
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- CN210559747U CN210559747U CN201920739347.6U CN201920739347U CN210559747U CN 210559747 U CN210559747 U CN 210559747U CN 201920739347 U CN201920739347 U CN 201920739347U CN 210559747 U CN210559747 U CN 210559747U
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Abstract
The utility model provides an industrial heavy metal sewage treatment system, which comprises a pretreatment unit, a reaction sedimentation tank, an adsorption unit, a post-treatment unit and a sludge treatment unit connected with the reaction sedimentation tank, wherein the pretreatment unit, the reaction sedimentation tank, the adsorption unit and the post-treatment unit are connected in sequence; the adsorption unit comprises a heavy metal adsorption device and an adsorption material regeneration device, the first reflux pipe is connected between the adsorption material regeneration device and the regulating tank, and the heavy metal adsorption device is connected with the post-treatment unit. The utility model has the advantages that the neutralization precipitation method and the activated carbon adsorption method are combined for treatment, so that heavy metal ions in the wastewater can be completely removed; the regeneration times of the activated carbon are reduced, and the cost is saved; the adsorbed heavy metal can be enriched, and the recycling of the heavy metal is facilitated.
Description
Technical Field
The utility model belongs to the environmental protection field, concretely relates to industry heavy metal sewage treatment system.
Background
In some industrial fields, such as the industries of electronics, chemical engineering, metallurgy and the like, a large amount of heavy metal wastewater can be generated, heavy metals are not easy to degrade in organisms and only can be migrated, when the heavy metals in the organisms are enriched to a certain degree, the organisms can be greatly damaged, and even serious people can die.
At present, the biodegradability of industrial wastewater containing heavy metals is mostly poor, so physicochemical methods such as chemical precipitation or adsorption are mainly adopted for treatment; at present, different precipitation methods have different treatment defects, for example, the calcium ions in the wastewater are too much due to the precipitation of the added limestone; the sulfuration precipitation method can generate pollutants such as hydrogen sulfide and the like in the treatment process; the hydroxide precipitation method is difficult to remove heavy metal ions because the precipitation moisture content is too large and is difficult to treat, and the pH value of hydroxide generated by different heavy metal ions is different; the adsorption method usually adopts activated carbon or ion resin for adsorption, but the adsorption saturation needs regeneration, the treatment cost is high, and the adsorbed heavy metal ions are difficult to collect and recycle.
Disclosure of Invention
In order to solve the technical problem, the utility model provides an industrial heavy metal sewage treatment system.
The specific technical scheme is as follows:
the industrial heavy metal sewage treatment system is characterized by comprising a pretreatment unit, a reaction sedimentation tank, an adsorption unit, a post-treatment unit and a sludge treatment unit connected with the reaction sedimentation tank which are sequentially connected, wherein a first return pipe is connected between the adsorption unit and the pretreatment unit, and a second return pipe is connected between the sludge treatment unit and the pretreatment unit;
the pretreatment unit is used for primarily adjusting water quality, the reaction sedimentation tank is used for adjusting the pH value of wastewater to be alkaline and reacting with heavy metal ions to generate precipitates, the sludge treatment unit is used for treating the precipitates and sludge generated in the reaction sedimentation tank and refluxing the wastewater generated by treating the precipitates and sludge to the pretreatment unit, and the post-treatment unit is used for adjusting the wastewater to be neutral;
the adsorption unit comprises a heavy metal adsorption device and an adsorption material regeneration device, the first backflow pipe is connected between the adsorption material regeneration device and the pretreatment unit, and the heavy metal adsorption device is connected with the post-treatment unit.
In the above technical scheme, the pretreatment unit comprises a grid and an adjusting tank which are connected in sequence.
In the above technical solution, the sludge treatment unit includes a sludge concentration tank and a sludge dewatering device, and the second return pipe is connected between the adjusting tank and the sludge concentration tank.
In the technical scheme, the post-treatment unit comprises a neutralization pond and a stabilization pond, and aquatic plants for adsorbing heavy metal ions are planted in the stabilization pond.
In the technical scheme, a plurality of dosing nozzles are distributed in the reaction sedimentation tank, and a submersible stirrer is arranged in the tank.
In the technical scheme, a sludge conveying pipeline is connected between the adjusting tank and the sludge treatment unit.
In the above technical scheme, the heavy metal adsorption device contains an activated carbon adsorption material.
In the above technical solution, the first return pipe is connected between the adsorbing material regenerating device and the regulating tank.
Compared with the prior art, the utility model has the advantages that (1) the heavy metal ions in the wastewater can be completely removed by combining the precipitation method and the activated carbon adsorption method for treatment; (2) the mode of wastewater backflow of a sludge treatment unit and desorption liquid treatment backflow is adopted, so that new 'three wastes' cannot be generated in the wastewater treatment project; (3) the regeneration times of the activated carbon are reduced, and the cost is saved; (4) the adsorbed heavy metal can be enriched, and the recycling of the heavy metal is facilitated.
Drawings
FIG. 1 is a system diagram according to an embodiment;
FIG. 2 is a diagram of an adsorption unit of the embodiment;
the system comprises a pretreatment unit 1, a reaction sedimentation tank 2, an adsorption unit 3, a post-treatment unit 4, a sludge treatment unit 5, a first return pipe 6, a second return pipe 7, a sludge conveying channel 8, a grid 101, a regulation tank 102, a heavy metal adsorption device 301, an adsorption material regeneration device 302, a neutralization tank 401, a stabilization pond 402, a sludge concentration pond 501 and a sludge dewatering device 502.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.
Example one
An industrial heavy metal sewage treatment system comprises a pretreatment unit 1, a reaction sedimentation tank 2, an adsorption unit 3, a post-treatment unit 4 and a sludge treatment unit 5 connected with the reaction sedimentation tank 2, which are connected in sequence;
the pretreatment unit 1 comprises a grating 101 and a regulating tank 102 which are connected in sequence;
the sludge treatment unit 5 comprises a sludge concentration tank 501 and a sludge dewatering device 502, the adjusting tank 102 and the sludge concentration tank 501 are connected with a sludge conveying pipeline 8, solid residues generated in industrial production are removed by the grid tank 101, the adjusting tank 102 adjusts the quality of balanced water quality and is connected with the sludge concentration tank 501, fine residues isolated by the adjusting tank 102 are discharged to the sludge concentration tank 501, a second return pipe 7 is connected between the sludge concentration tank 501 and the adjusting tank 102, and wastewater treated by the sludge concentration tank flows back to the adjusting tank 102 through the second return pipe 7.
A plurality of dosing nozzles are distributed in the reaction sedimentation tank 2, a submersible stirrer is arranged in the tank, the dosing nozzles are used for adding alkaline substances such as sodium hydroxide and the like to generate sediments, the medicines of the stirrer and the wastewater are fully reflected, after a preset pH value is reached, the stirrer is stood to fully precipitate hydroxide sediments, the sediments enter a sludge concentration tank 501, and liquid enters an adsorption unit 3;
The post-treatment unit 4 comprises a neutralization pond 401 and a stabilization pond 402, wherein the neutralization pond 401 is used for adjusting the wastewater to be neutral and then discharging the wastewater to the stabilization pond 402, and aquatic plants for adsorbing heavy metal ions are planted in the stabilization pond 402 to adsorb the residual heavy metal.
The utility model discloses combine precipitation method and activated carbon adsorption method, both supplement each other, can't remove the heavy metal ion to the greatest extent in depositing with activated carbon adsorption, a small amount of heavy metal ion of activated carbon adsorption and sediment residue can compensate single absorption and cause the easy saturation of absorption and need the problem that the activated carbon will be constantly regenerated and lead to the cost higher, to the equalizing basin after collecting the washing waste liquid backward flow that the desorption produced, can recycle the heavy metal enrichment after adsorbing, also avoid new three wastes to produce.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The industrial heavy metal sewage treatment system is characterized by comprising a pretreatment unit, a reaction sedimentation tank, an adsorption unit, a post-treatment unit and a sludge treatment unit connected with the reaction sedimentation tank which are sequentially connected, wherein a first return pipe is connected between the adsorption unit and the pretreatment unit, and a second return pipe is connected between the sludge treatment unit and the pretreatment unit;
the pretreatment unit is used for primarily adjusting water quality, the reaction sedimentation tank is used for adjusting the pH value of wastewater to be alkaline and reacting with heavy metal ions to generate precipitates, the sludge treatment unit is used for treating the precipitates and sludge generated in the reaction sedimentation tank and refluxing the wastewater generated by treating the precipitates and sludge to the pretreatment unit, and the post-treatment unit is used for adjusting the wastewater to be neutral;
the adsorption unit comprises a heavy metal adsorption device and an adsorption material regeneration device, the first backflow pipe is connected between the adsorption material regeneration device and the pretreatment unit, and the heavy metal adsorption device is connected with the post-treatment unit.
2. The industrial heavy metal sewage treatment system of claim 1, wherein the pretreatment unit comprises a grid and a regulating tank which are connected in sequence.
3. The industrial heavy metal sewage treatment system of claim 2, wherein the sludge treatment unit comprises a sludge concentration tank and a sludge dewatering device, and the second return pipe is connected between the regulating tank and the sludge concentration tank.
4. The industrial heavy metal sewage treatment system of claim 1, wherein the post-treatment unit comprises a neutralization pond and a stabilization pond, and aquatic plants for adsorbing heavy metal ions are planted in the stabilization pond.
5. The industrial heavy metal sewage treatment system of claim 1, wherein a plurality of dosing nozzles are distributed in the reaction sedimentation tank, and a submersible mixer is arranged in the tank.
6. The industrial heavy metal sewage treatment system of claim 2, wherein a sludge transport pipeline is connected between the regulating pond and the sludge treatment unit.
7. The industrial heavy metal sewage treatment system of claim 1, wherein the heavy metal adsorption device comprises an activated carbon adsorption material.
8. The industrial heavy metal sewage treatment system of claim 2 wherein the first return line is connected between the adsorbent material regeneration device and the conditioning tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920739347.6U CN210559747U (en) | 2019-05-22 | 2019-05-22 | Industrial heavy metal sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920739347.6U CN210559747U (en) | 2019-05-22 | 2019-05-22 | Industrial heavy metal sewage treatment system |
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| CN210559747U true CN210559747U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892241A (en) * | 2020-07-23 | 2020-11-06 | 广州市金环环保工程有限公司 | Industrial sewage purification method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892241A (en) * | 2020-07-23 | 2020-11-06 | 广州市金环环保工程有限公司 | Industrial sewage purification method |
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