CN114349214A - Efficient arsenic removal process and device for underground water - Google Patents

Efficient arsenic removal process and device for underground water Download PDF

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Publication number
CN114349214A
CN114349214A CN202210004715.9A CN202210004715A CN114349214A CN 114349214 A CN114349214 A CN 114349214A CN 202210004715 A CN202210004715 A CN 202210004715A CN 114349214 A CN114349214 A CN 114349214A
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reaction tank
underground water
tank body
wall
water
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熊高丽
李文祺
蒋颖龄
吴维乐
周晨
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Hunan Yunhe Information Technology Co ltd
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Hunan Yunhe Information Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281Installations for water purification using chemical agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • C02F1/763Devices for the addition of such compounds in gaseous form
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/103Arsenic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06Contaminated groundwater or leachate
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/06Controlling or monitoring parameters in water treatment pH
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/29Chlorine compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/40Liquid flow rate
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/42Liquid level

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention discloses a process and a device for efficiently removing arsenic from underground water, relating to the technical field of water treatment; the method aims to solve the problem that the pH value of underground water after the mixed flocculant cannot be regulated; the process flow specifically comprises the steps of inputting underground water into a reaction tank through a pipeline, and introducing chlorine into the reaction tank; detecting the chlorine content of the underground water flowing out of the reaction tank by using a chlorine content detector; a reaction tank for mixing groundwater and flocculating agent specifically includes the reaction tank body, reaction tank body inner wall is fixed with air duct, baffle and inclined plate sedimentation tank body respectively, and air duct bottom outer wall is pegged graft and is had jet-propelled pipe, and air duct top outer wall is pegged graft and is had the pneumatic valve. The method comprises the steps of putting the polyaluminium chloride and the polyferric sulfate into underground water to be purified according to a proportion, adding lime to adjust the pH value range of the water, reducing the hardness of the water, and effectively improving the arsenic adsorption efficiency of the polyferric sulfate by adjusting the pH value.

Description

Efficient arsenic removal process and device for underground water
Technical Field
The invention relates to the technical field of water treatment, in particular to an efficient arsenic removal process and device for underground water.
Background
Arsenic is a toxic heavy metal, and the sources of arsenic pollution in water are: a natural source: weathering of minerals and rocks, eruption of volcanoes, and upward water overflow of hot springs; artificial source: and (4) mining and smelting arsenide. These factors cause significant pollution of both groundwater and drinking water. Therefore, arsenic removal from drinking water is a key measure for preventing and treating endemic arsenic poisoning.
The current device that removes arsenic purification to groundwater all can't be effectual creates a good flocculation environment, can't be effectual regulates and control the pH value of mixed flocculating agent back groundwater to influence groundwater flocculation effect, lead to groundwater to remove arsenic purifying effect not good.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a process and a device for efficiently removing arsenic from underground water.
In order to achieve the purpose, the invention adopts the following technical scheme:
an efficient arsenic removal process for underground water comprises the following steps:
s1: inputting underground water into a reaction tank through a pipeline, and introducing chlorine into the reaction tank;
s2: detecting the chlorine content of the underground water flowing out of the reaction tank by using a chlorine content detector;
s3: adding polymeric ferric sulfate into the reaction tank according to the proportion of 30-80 kg/1000 cubic meters of water;
s4: adding polyaluminium chloride which is equivalent to 80 percent of the input amount of the polymeric ferric sulfate into a reaction tank;
s5: detecting the pH value of the inlet of the reaction tank in real time through a pH detector, and adding lime emulsion with corresponding quality into the reaction tank according to the real-time variation of the pH value;
s6: the underground water added with the flocculating agent and adjusted with the pH value flows into an inclined plate sedimentation tank for sedimentation;
s7: the underground water after being precipitated in the inclined plate sedimentation tank enters a siphon filter tank through a pipeline for filtration, and the process of purifying and removing arsenic from the underground water can be completed after the filtration.
Preferably: in the S2, the residual chlorine content of the underground water flowing out of the reaction tank is more than or equal to 0.5 mg/L.
Further: in the step S3, the polymeric ferric sulfate put into the reaction tank is diluent, and the concentration of the polymeric ferric sulfate diluent is between 5 and 6 percent.
Further preferred is: in the step S4, a turbidity meter is used for detecting the underground water added with the flocculating agent, the turbidity is controlled within 1NTU, the polyaluminium chloride added into the reaction tank is used as diluent, and the preparation concentration of the polyaluminium chloride diluent is between 1 and 5 percent.
As a preferable aspect of the present invention: in the S5, the preparation concentration of the lime emulsion is between 1% and 5%, and the pH value of the underground water flowing out of the reaction tank is kept between 6.5 and 7.5.
Further preferred as the invention: in the S7, the siphon filter adopts a filter bed made of quartz filter sand, when the grain size of sand is larger than 40 meshes, the height of the filter bed is not lower than 20 cm, and when the grain size of sand is smaller than 40 meshes, the height of the filter bed is between 10 cm and 15 cm.
The utility model provides a high-efficient arsenic device that removes of groundwater, including the reaction tank body, reaction tank body inner wall is fixed with the air duct respectively, baffle and inclined plate sedimentation tank body, air duct bottom outer wall is pegged graft and is had jet-propelled pipe, air duct top outer wall is pegged graft and is had the pneumatic valve, the pneumatic valve runs through in reaction tank body top outer wall, reaction tank body top outer wall is respectively through the screw fixation has lime emulsion feed box, polyferric sulfate feed box and polyaluminium chloride feed box, lime emulsion feed box, polyferric sulfate feed box and polyaluminium chloride feed tank bottom outer wall run through respectively in reaction tank body top outer wall, reaction tank body top outer wall is through the screw fixation has first motor and second motor, the output shaft of first motor and second motor has the puddler through the coupling joint respectively, the puddler runs through in reaction tank body top outer wall.
On the basis of the scheme: the sludge collecting box is fixed on the outer wall of the bottom of the reaction tank body, the water conveying pipe and the water inlet are respectively inserted into the outer walls of two sides of the reaction tank body, the water level sensor is fixed on the inner wall of the reaction tank body through screws, the electromagnetic flow meter is sleeved on the outer wall of the water conveying pipe, the control panel is fixed on the outer wall of one side of the reaction tank body through screws, and the air valve, the first motor, the second motor, the water level sensor and the electromagnetic flow meter are respectively electrically connected with the control panel.
The invention has the beneficial effects that:
1. use polyaluminium chloride and polyferric sulfate to drop into the groundwater of treating purifying in proportion, add the pH value scope of lime regulating water afterwards, and can reduce the hardness of water, simultaneously through the adjustment to pH value, can effectively improve polyferric sulfate to the adsorption efficiency of arsenic, through adding polyaluminium chloride, the volume of throwing that can effectual reduction polyferric sulfate, simultaneously can effectually avoid polyferric sulfate to lead to the problem that pH is on the low side and the water residual has iron after purifying, thereby improve arsenic removal efficiency, realize that the high efficiency of aquatic arsenic is got rid of.
2. The adding equipment realizes automatic adjustment control, and if the adding amount of the lime emulsion is controlled according to the pH value detected by the pH detector, the pH value of underground water flowing out of the reaction tank can be kept between 6.5 and 7.5, and simultaneously, the adding amount of polymeric ferric sulfate and polymeric aluminum chloride is controlled according to the water inlet amount.
3. A plurality of jet-propelled pipes through air duct bottom grafting spray chlorine to the inside groundwater of reaction tank body, can let groundwater and chlorine intensive mixing, carry out the pre-oxidation treatment through the chlorine that spouts into the reaction tank body to groundwater, the stirring through the puddler simultaneously improves the mixed effect of groundwater and flocculating agent and lime emulsion, can effectual improvement device remove arsenic efficiency.
4. Underground water after mixing floods the inside sediment that gets into the inclined plate sedimentation tank body of baffle, deposit the silt that produces and get into the silt collecting box, and outside through silt collecting box eduction gear, open the raceway afterwards, underground water after will depositing the processing is sent into subsequent siphon filtering pond through the raceway and is filtered, water level sensor and electromagnetic flowmeter can the inside water level height of real-time detection reaction tank body and handle the discharged water yield after accomplishing, thereby make things convenient for the staff to remove arsenic device to groundwater and carry out the management and control.
Drawings
FIG. 1 is a schematic view of the internal structure of an efficient arsenic removal device for underground water according to the present invention;
FIG. 2 is a schematic side view of the apparatus for removing arsenic from underground water according to the present invention;
FIG. 3 is a schematic flow chart of the process for efficiently removing arsenic from underground water provided by the invention;
FIG. 4 is a schematic circuit flow diagram of an efficient arsenic removal device for underground water according to the present invention.
In the figure: the device comprises a reaction tank body 1, a partition plate 2, a water level sensor 3, a stirring rod 4, a sludge collecting box 5, an inclined plate sedimentation tank body 6, a water delivery pipe 7, an electromagnetic flow meter 8, a first motor 9, a lime emulsion feeding box 10, a second motor 11, a polymeric ferric sulfate feeding box 12, a polymeric aluminum chloride feeding box 13, a gas guide pipe 14, a gas jet pipe 15, a gas valve 16, a water inlet 17 and a control panel 18.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1:
an efficient arsenic removal process for underground water, as shown in fig. 3, comprises the following steps:
s1: inputting underground water into a reaction tank through a pipeline, and introducing chlorine into the reaction tank;
s2: detecting the chlorine content of the underground water flowing out of the reaction tank by using a chlorine content detector;
s3: adding polymeric ferric sulfate into the reaction tank according to the proportion of 30-80 kg/1000 cubic meters of water;
s4: adding polyaluminium chloride which is equivalent to 80 percent of the input amount of the polymeric ferric sulfate into a reaction tank;
s5: detecting the pH value of the inlet of the reaction tank in real time through a pH detector, and adding lime emulsion with corresponding quality into the reaction tank according to the real-time variation of the pH value;
s6: the underground water added with the flocculating agent and adjusted with the pH value flows into an inclined plate sedimentation tank for sedimentation;
s7: the underground water after being precipitated in the inclined plate sedimentation tank enters a siphon filter tank through a pipeline for filtration, and the process of purifying and removing arsenic from the underground water can be completed after the filtration.
In the S2, the residual chlorine content of the underground water flowing out of the reaction tank is more than or equal to 0.5 mg/L;
in the S3, the polymeric ferric sulfate put into the reaction tank is diluent, and the concentration of the polymeric ferric sulfate diluent is between 5 and 6 percent;
in the step S4, a turbidity meter is used for detecting the underground water added with the flocculating agent, the turbidity is controlled within 1NTU, the polyaluminium chloride added into the reaction tank is used as diluent, and the preparation concentration of the polyaluminium chloride diluent is between 1 and 5 percent;
in the S5, the preparation concentration of the lime emulsion is between 1% and 5%, and the pH value of underground water flowing out of the reaction tank is kept between 6.5 and 7.5;
in the S7, the siphon filter adopts a filter bed made of quartz filter sand, when the grain size of sand is larger than 40 meshes, the height of the filter bed is not lower than 20 cm, and when the grain size of sand is smaller than 40 meshes, the height of the filter bed is between 10 cm and 15 cm.
Example 2:
an efficient arsenic removal device for underground water, as shown in fig. 1, 2 and 4, in order to improve the arsenic removal efficiency of the device; comprises a reaction tank body 1, wherein an air duct 14, a partition plate 2 and an inclined plate sedimentation tank body 6 are respectively fixed on the inner wall of the reaction tank body 1, an air injection pipe 15 is inserted and connected on the outer wall of the bottom of the air duct 14, an air valve 16 is inserted and connected on the outer wall of the top of the air duct 14, the air valve 16 penetrates through the outer wall of the top of the reaction tank body 1, a lime emulsion feeding box 10 is respectively fixed on the outer wall of the top of the reaction tank body 1 through screws, the device comprises a polymeric ferric sulfate feeding box 12 and a polymeric aluminum chloride feeding box 13, wherein the outer walls of the bottoms of the lime emulsion feeding box 10, the polymeric ferric sulfate feeding box 12 and the polymeric aluminum chloride feeding box 13 respectively penetrate through the outer wall of the top of a reaction tank body 1, a first motor 9 and a second motor 11 are fixed on the outer wall of the top of the reaction tank body 1 through screws, output shafts of the first motor 9 and the second motor 11 are respectively connected with a stirring rod 4 through a coupler, and the stirring rod 4 penetrates through the outer wall of the top of the reaction tank body 1;
the sludge collection box 5 is fixed on the outer wall of the bottom of the reaction tank body 1, the water delivery pipe 7 and the water inlet 17 are respectively inserted into the outer walls of two sides of the reaction tank body 1, the water level sensor 3 is fixed on the inner wall of the reaction tank body 1 through screws, the electromagnetic flowmeter 8 is sleeved on the outer wall of the water delivery pipe 7, the control panel 18 is fixed on the outer wall of one side of the reaction tank body 1 through screws, the air valve 16, the first motor 9, the second motor 11, the water level sensor 3 and the electromagnetic flowmeter 8 are respectively and electrically connected with the control panel 18, and the water level sensor 3 is AL-530AE in model; the working personnel pour proper amount of prepared polymeric ferric sulfate diluent, polymeric aluminum chloride diluent and lime emulsion into a lime emulsion feeding box 10, a polymeric ferric sulfate feeding box 12 and a polymeric aluminum chloride feeding box 13 for temporary storage, then send underground water to be treated into the reaction tank body 1 through a water inlet 17, the working personnel connect an external device for storing and conveying chlorine with an air valve 16 through a pipeline, open the air valve 16 to allow the chlorine to be uniformly sprayed out through an air spraying pipe 15, oxidize the underground water entering the reaction tank body 1, improve arsenic removal efficiency, open the lime emulsion feeding box 10, the polymeric ferric sulfate feeding box 12 and the polymeric aluminum chloride feeding box 13 at the same time, inject various prepared flocculating agents and lime emulsion into the reaction tank body 1, control the first motor 9 and the second motor 11 to run at the same time, stir the underground water flowing through the reaction tank body 1, improving the mixing effect of the underground water, the flocculating agent and the lime emulsion;
groundwater after mixing floods baffle 2 and gets into 6 insides of inclined plate sedimentation tank body and deposits, deposit the silt that produces and get into silt collecting box 5, and outside 5 eduction gear of silt collecting box, open raceway 7 afterwards, groundwater after will depositing the processing is sent into subsequent siphon filtering pond through raceway 7 and is filtered, water level sensor 3 and electromagnetic flowmeter 8 can the inside water level height of real-time detection reaction tank body 1 and handle the discharged water yield after accomplishing, thereby make things convenient for the staff to remove arsenic device to groundwater and carry out the management and control.
When the device is used, a worker pours a proper amount of pre-prepared diluted polymeric ferric sulfate solution, diluted polymeric aluminum chloride solution and lime emulsion into the lime emulsion feeding box 10, the polymeric ferric sulfate feeding box 12 and the polymeric aluminum chloride feeding box 13 for temporary storage, then sends underground water to be treated into the reaction tank body 1 through the water inlet 17, connects an external chlorine gas storage and delivery device with the gas valve 16 through a pipeline, opens the gas valve 16 to allow chlorine gas to be uniformly sprayed out through the gas spraying pipe 15, opens the lime emulsion feeding box 10, the polymeric ferric sulfate feeding box 12 and the polymeric aluminum chloride feeding box 13 at the same time, injects various pre-prepared flocculants and lime emulsion into the reaction tank body 1, controls the first motor 9 and the second motor 11 to operate at the same time, stirs the underground water passing through the reaction tank body 1, the groundwater after mixing floods baffle 2 and gets into inside the sedimentation tank body of swash plate 6 and deposits, and the silt that the sediment produced gets into silt collecting box 5 to outside through 5 eduction gear of silt collecting box, open raceway 7 afterwards, send the groundwater after the sedimentation treatment into subsequent siphon filtering pond through raceway 7 and filter, level sensor 3 and electromagnetic flowmeter 8 can the inside water level height of real-time detection reaction tank body 1 and handle the discharged water yield after accomplishing.
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 (8)

1. The process for efficiently removing arsenic from underground water is characterized by comprising the following steps:
s1: inputting underground water into a reaction tank through a pipeline, and introducing chlorine into the reaction tank;
s2: detecting the chlorine content of the underground water flowing out of the reaction tank by using a chlorine content detector;
s3: adding polymeric ferric sulfate into the reaction tank according to the proportion of 30-80 kg/1000 cubic meters of water;
s4: adding polyaluminium chloride which is equivalent to 80 percent of the input amount of the polymeric ferric sulfate into a reaction tank;
s5: detecting the pH value of the inlet of the reaction tank in real time through a pH detector, and adding lime emulsion with corresponding quality into the reaction tank according to the real-time variation of the pH value;
s6: the underground water added with the flocculating agent and adjusted with the pH value flows into an inclined plate sedimentation tank for sedimentation;
s7: the underground water after being precipitated in the inclined plate sedimentation tank enters a siphon filter tank through a pipeline for filtration, and the process of purifying and removing arsenic from the underground water can be completed after the filtration.
2. The process of claim 1, wherein in S2, the residual chlorine content in the groundwater flowing out of the reaction tank is greater than or equal to 0.5 mg/L.
3. The process of claim 2, wherein in the step S3, the polymeric ferric sulfate fed into the reaction tank is a diluent, and the concentration of the polymeric ferric sulfate diluent is between 5% and 6%.
4. The process of claim 3, wherein in S4, a turbidity meter is used to detect the groundwater to which the flocculant has been added, the turbidity is controlled within 1NTU, the polyaluminium chloride added to the reaction tank is used as a diluent, and the preparation concentration of the polyaluminium chloride diluent is between 1% and 5%.
5. The process for efficiently removing arsenic from underground water as claimed in claim 4, wherein in S5, the lime emulsion is prepared at a concentration of 1-5%, and the pH value of the underground water flowing out of the reaction tank is kept between 6.5 and 7.5.
6. The process of claim 5, wherein in step S7, the siphon filter tank is a filter bed made of quartz filter sand, and when the sand grain size is larger than 40 meshes, the height of the filter bed is not lower than 20 cm, and when the sand grain size is smaller than 40 meshes, the height of the filter bed is between 10 cm and 15 cm.
7. The device for efficiently removing arsenic from underground water comprises a reaction tank body (1) and is characterized in that an air duct (14), a partition plate (2) and an inclined plate sedimentation tank body (6) are respectively fixed on the inner wall of the reaction tank body (1), an air injection pipe (15) is inserted into the outer wall of the bottom of the air duct (14), an air valve (16) is inserted into the outer wall of the top of the air duct (14), the air valve (16) penetrates through the outer wall of the top of the reaction tank body (1), a lime emulsion feeding box (10), a polymeric ferric sulfate feeding box (12) and a polymeric aluminum chloride feeding box (13) are respectively fixed on the outer wall of the top of the reaction tank body (1) through screws, a first motor (9) and a second motor (11) are respectively fixed on the outer wall of the top of the reaction tank body (1), the output shafts of the first motor (9) and the second motor (11) are respectively connected with a stirring rod (4) through a coupler, and the stirring rod (4) penetrates through the outer wall of the top of the reaction tank body (1).
8. The efficient arsenic removal device for underground water as claimed in claim 7, wherein a sludge collection box (5) is fixed on the outer wall of the bottom of the reaction tank body (1), the outer walls of two sides of the reaction tank body (1) are respectively inserted with a water delivery pipe (7) and a water inlet (17), a water level sensor (3) is fixed on the inner wall of the reaction tank body (1) through screws, an electromagnetic flowmeter (8) is sleeved on the outer wall of the water delivery pipe (7), a control panel (18) is fixed on the outer wall of one side of the reaction tank body (1) through screws, and the air valve (16), the first motor (9), the second motor (11), the water level sensor (3) and the electromagnetic flowmeter (8) are respectively and electrically connected with the control panel (18).
CN202210004715.9A 2022-01-04 2022-01-04 Efficient arsenic removal process and device for underground water Pending CN114349214A (en)

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CN104961275A (en) * 2015-07-01 2015-10-07 毛允明 Arsenic removing water purification treatment method
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