CN211141784U - High-iron-content electroplating wastewater pretreatment system - Google Patents
High-iron-content electroplating wastewater pretreatment system Download PDFInfo
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- CN211141784U CN211141784U CN201922083911.6U CN201922083911U CN211141784U CN 211141784 U CN211141784 U CN 211141784U CN 201922083911 U CN201922083911 U CN 201922083911U CN 211141784 U CN211141784 U CN 211141784U
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Abstract
The utility model discloses a high iron content electroplating wastewater pretreatment of water system, include: the device comprises a pre-aeration adjusting unit, a manganese sand filtering and iron removing unit and a microfiltration membrane unit which are sequentially connected through pipelines; the pre-aeration adjusting unit comprises a pre-aeration tank, a compressed air aeration disc arranged at the bottom of the pre-aeration tank, the compressed air aeration disc is connected with an external compressed air source through a compressed air pipeline, an online dissolved oxygen determinator and a manganese sand filtering and iron removing unit which are arranged at the top of the pre-aeration tank comprise a pressure type manganese sand iron removing filter and an air-water combined backwashing device connected to an inlet and outlet pipeline of the pressure type manganese sand iron removing filter reactor; the microfiltration membrane unit comprises a tubular external-pressure type microfiltration membrane and an inlet and outlet water pump; the pre-aeration tank, the pressure type manganese sand iron removal filter and the tubular external compression type micro-filtration membrane are sequentially connected through a pipeline; the utility model discloses effectively improve the treatment effeciency of iron ion in the waste water, improved the stability and the suitability of the quality of water and system of intaking, reduced the running cost of waste water pretreatment systems.
Description
Technical Field
The utility model relates to a sewage treatment technology, more specifically say, especially relate to a high iron content electroplating wastewater pretreatment systems.
Background
The electroplating liquid flushing wastewater in the steel industry contains heavy metal ions, has high biological toxicity, can be accumulated in certain organs of a human body, and causes chronic poisoning; but the wastewater also contains high-value metal ions with higher concentration, so the treatment idea of concentration and reuse can reduce the environmental pollution, and simultaneously the high-value metal ions can be recovered, thereby saving the operation cost.
The membrane method is a seawater desalination method, utilizes the principle of osmotic pressure, is widely applied to water treatment technology, mainly comprises microfiltration, ultrafiltration and reverse osmosis technologies, and can achieve the purpose of efficiently removing pollutants by applying the membrane method in the pure water preparation technology.
However, the main process of concentration and recycling by using the membrane method is affected by Fe in water2+Thus, an effective pretreatment for reducing Fe is required in the treatment of plating bath rinsing wastewater2+The content of Fe in the electroplating liquid washing wastewater is low due to the poor efficiency of the traditional iron removal pretreatment2+When the concentration of (b) exceeds 50mg/l, the effluent Fe2+The method is easy to exceed the standard, so a feasible pretreatment iron removal process with strong practicability is needed, the high-efficiency removal of impurity elements is realized, and the concentration and recycling of valuable heavy metal elements are guaranteed.
In summary, in the prior art of concentrating and recycling electroplating solution rinsing wastewater, Fe in the electroplating solution rinsing wastewater2+The ion is a major factor affecting the process, and there is a need for a process that can effectively remove Fe from water2+。
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect that exists among the prior art, the utility model aims at providing a high iron content electroplating wastewater pretreatment systems to realize effectively getting rid of the Fe that the plating solution washed in the waste water2+And ions meet the requirement of taking a membrane method as a concentration and recycling process.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-iron-content electroplating wastewater pretreatment system comprises: the device comprises a pre-aeration adjusting unit, a manganese sand filtering and deironing unit and a microfiltration membrane unit which are sequentially connected through pipelines.
The pre-aeration adjusting unit comprises: the system comprises a pre-aeration tank, a compressed air aeration disc arranged at the bottom of the pre-aeration tank, a water inlet and a water outlet, wherein the compressed air aeration disc is connected with an external compressed air source through a compressed air pipeline;
manganese sand filters deironing unit includes: the system comprises a pressure type manganese sand iron removal filter and air-water combined backwashing equipment, wherein the air-water combined backwashing equipment is connected to a water inlet pipeline and a water outlet pipeline of a reactor on the pressure type manganese sand iron removal filter;
the microfiltration membrane unit comprises a tubular external-pressure type microfiltration membrane, a water inlet and a water outlet are formed in the tubular external-pressure type microfiltration membrane, the water inlet of the tubular external-pressure type microfiltration membrane is connected with the water outlet of the pressure type manganese sand deironing filter through a pipeline, and the water outlet of the tubular external-pressure type microfiltration membrane is connected with a water outlet pump through a pipeline;
and water pumps are arranged on the pipeline between the pre-aeration tank and the pressure type manganese sand iron removal filter and the pipeline between the pressure type manganese sand iron removal filter and the tubular external pressure type micro-filtration membrane.
The manganese sand iron removal filter is filled with a manganese sand filler layer, and the height of the manganese sand filler layer is 1.2-3.5 m.
The external compressed air source is a blower or an air compressor.
And a valve is arranged on the compressed air pipeline.
The online dissolved oxygen tester is respectively in control connection with the external compressed air source and the valve.
In the technical scheme, the utility model provides a high iron content electroplating wastewater pretreatment of water system still has following several beneficial effect:
1) the pretreatment efficiency of the iron-containing electroplating solution flushing wastewater is improved by adopting pre-aeration, manganese sand iron removal and microfiltration membrane protection;
2) compared with the traditional wastewater pretreatment system, the system improves the stability and the applicability of the system while improving the iron removal efficiency.
Drawings
FIG. 1 is a schematic structural view of the high-iron electroplating wastewater pretreatment system of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
With reference to fig. 1, the utility model provides a high iron content electroplating wastewater pretreatment system, including: the device comprises a pre-aeration adjusting unit 1, a manganese sand filtering and deironing unit 2 and a microfiltration membrane unit 3 which are sequentially connected through pipelines.
The pre-aeration adjusting unit 1 includes: the system comprises a pre-aeration tank 14, a compressed air aeration disc 12 arranged at the bottom of the pre-aeration tank 14, a compressed air aeration disc 12 connected with an external compressed air source 13 through a compressed air pipeline, an online dissolved oxygen tester 11 arranged at the top of the pre-aeration tank 14, a water inlet and a water outlet arranged on the pre-aeration tank, and a water inlet of the pre-aeration tank 14 connected with external wastewater through a pipeline.
Preferably, the pre-aeration regulating unit further comprises a dissolved oxygen feedback system, and the dissolved oxygen feedback system controls the frequency of the blower or the air compressor and the opening of the valve of the compressed air pipeline by measuring the change of the dissolved oxygen value in real time by the online dissolved oxygen measuring instrument 11, so that the concentration of the dissolved oxygen in the wastewater is not lower than 3.5 mg/l.
Manganese sand filters deironing unit 2 includes: the system comprises a pressure type manganese sand iron removal filter 21 and air-water combined backwashing equipment 22 connected to a water inlet pipeline and a water outlet pipeline of a reactor on the pressure type manganese sand iron removal filter 21, wherein the pressure type manganese sand iron removal filter 21 is provided with a water inlet and a water outlet, and the water inlet of the pressure type manganese sand iron removal filter 21 is connected with the water outlet of the pre-aeration tank 14 through a pipeline.
The manganese sand deironing filter 21 is filled with a manganese sand packing layer, the filtering speed of the pressure type manganese sand deironing filter 21 is 3-6 m/h, the height of the packing layer is 1.2-3.5 m, and the packing layer d801.2-3.0 mm.
The flushing period of the air-water combined backwashing equipment 22 is set to be 6-12 h, and the resistance value of the bed layer is set to be 5-8 m.
A water pump 23 is arranged on a pipeline connecting the water outlet of the pre-aeration tank 14 and the water inlet of the pressure type manganese sand iron removal filter 21, and a water pump 32 is arranged on a pipeline connecting the water outlet of the pressure type manganese sand iron removal filter 21 and the water inlet of the tubular external pressure type micro-filtration membrane 31.
The water pump 23 is used for providing a lifting effect for the wastewater in the pre-aeration tank 14, so that the wastewater in the pre-aeration tank 14 enters the pressure type manganese sand deironing filter 21 through a pipeline; the water pump 32 is used for providing a lifting action for the pressure type manganese sand deironing filter 21, so that the wastewater in the pressure type manganese sand deironing filter 21 enters the tubular external pressure type microfiltration membrane 31 through a pipeline.
The utility model discloses high iron content electroplating wastewater pretreatment of water system's concrete process flow as follows:
1) the electroplating solution flushing wastewater flows through a water pump or automatically flows through a pipeline to enter the pre-aeration tank 14, and the concentration of dissolved oxygen in the wastewater in the pre-aeration tank is not lower than 3.5mg/l through the water quality and water quantity regulation of the pre-aeration regulating unit 1;
2) the water pump 23 provides a lifting effect for the wastewater in the pre-aeration tank, so that the wastewater in the pre-aeration tank enters the pressure type manganese sand deironing filter 21 through a pipeline, is fully contacted with the manganese sand filler in the pressure type manganese sand deironing filter 21, and generates an activation deironing reaction, the filtering speed of the pressure type manganese sand deironing filter 21 is 3-6 m/h, the height of the whole filler layer is 1.2-3.5 m, and the filler layer d is801.2-3.0 mm;
3) after the activation deferrization reaction is finished, the water pump 32 plays a role in lifting the wastewater in the pressure type manganese sand deferrization filter 21, so that the wastewater in the pressure type manganese sand deferrization filter 21 enters the tubular external pressure type microfiltration membrane 31 through a pipeline, and iron-containing suspended matters in the wastewater are further removed through the suction effect of the water outlet pump 33 and the physical interception effect of the tubular external pressure type microfiltration membrane 31.
To sum up, the utility model discloses electroplating wastewater pretreatment of systems has ensured the dissolved oxygen concentration who gets into in the manganese sand filter for the activation deironing effect of manganese sand can full play, utilizes microfiltration membrane's high filtration precision to improve the quality of water simultaneously, compares with traditional pretreatment process, has improved the efficiency of deironing and the stability and the suitability of technology.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a high iron content electroplating wastewater pretreatment systems which characterized in that includes: the device comprises a pre-aeration adjusting unit, a manganese sand filtering and iron removing unit and a microfiltration membrane unit which are sequentially connected through pipelines;
the pre-aeration adjusting unit comprises: the system comprises a pre-aeration tank, a compressed air aeration disc arranged at the bottom of the pre-aeration tank, a water inlet and a water outlet, wherein the compressed air aeration disc is connected with an external compressed air source through a compressed air pipeline;
manganese sand filters deironing unit includes: the system comprises a pressure type manganese sand iron removal filter and air-water combined backwashing equipment, wherein the air-water combined backwashing equipment is connected to a water inlet pipeline and a water outlet pipeline of a reactor on the pressure type manganese sand iron removal filter;
the microfiltration membrane unit comprises a tubular external-pressure type microfiltration membrane, a water inlet and a water outlet are formed in the tubular external-pressure type microfiltration membrane, the water inlet of the tubular external-pressure type microfiltration membrane is connected with the water outlet of the pressure type manganese sand deironing filter through a pipeline, and the water outlet of the tubular external-pressure type microfiltration membrane is connected with a water outlet pump through a pipeline;
and water pumps are arranged on the pipeline between the pre-aeration tank and the pressure type manganese sand iron removal filter and the pipeline between the pressure type manganese sand iron removal filter and the tubular external pressure type micro-filtration membrane.
2. The high iron content electroplating wastewater pretreatment system of claim 1, characterized in that: the manganese sand iron removal filter is filled with a manganese sand filler layer, and the height of the manganese sand filler layer is 1.2-3.5 m.
3. The high iron content electroplating wastewater pretreatment system of claim 1, characterized in that: the external compressed air source is a blower or an air compressor.
4. The high iron content electroplating wastewater pretreatment system of claim 1, characterized in that: and a valve is arranged on the compressed air pipeline.
5. The high iron content electroplating wastewater pretreatment system of claim 3 or 4, characterized in that: the online dissolved oxygen tester is respectively in control connection with the external compressed air source and the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922083911.6U CN211141784U (en) | 2019-11-27 | 2019-11-27 | High-iron-content electroplating wastewater pretreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922083911.6U CN211141784U (en) | 2019-11-27 | 2019-11-27 | High-iron-content electroplating wastewater pretreatment system |
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| Publication Number | Publication Date |
|---|---|
| CN211141784U true CN211141784U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922083911.6U Active CN211141784U (en) | 2019-11-27 | 2019-11-27 | High-iron-content electroplating wastewater pretreatment system |
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| CN (1) | CN211141784U (en) |
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2019
- 2019-11-27 CN CN201922083911.6U patent/CN211141784U/en active Active
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