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A method and device for removing residual aluminum in mine water

A mine water and residual aluminum technology, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve toxicity and other problems, achieve low price, reduce dosage, and reduce residual aluminum content Effect

Active Publication Date: 2016-11-09
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of PAC will lead to a higher concentration of residual aluminum in mine water, and the accumulation of aluminum in the human body will be toxic to the human body, leading to the occurrence of diseases such as Alzheimer's disease, osteoporosis, and neurological disorders.

Method used

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  • A method and device for removing residual aluminum in mine water
  • A method and device for removing residual aluminum in mine water
  • A method and device for removing residual aluminum in mine water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1. Pump the mine water to be treated into the coagulation reaction tank. When the liquid level in the coagulation reaction tank reaches 50cm from the top of the pool, stop water intake; the size of the coagulation reaction tank is: 4000×5600×4500mm.

[0071] 2. Turn on the polyaluminum chloride dosing device and the activated carbon dosing device to coagulate the mine water. The dosage of polyaluminum chloride is 60mg / L, and the dosage of powdered lignite-based activated carbon is 5mg / L; Turn on the coagulation and stirring device to fully stir the mine water, first stir at a stirring rate of 200r / min for 2min, then reduce the stirring rate to 50r / min, and stir for 10min.

[0072] 3. The mine water after coagulation flows into the sedimentation tank by itself for static sedimentation. The time for static sedimentation is 20 minutes; the size of the sedimentation tank is: 4000×2000×4500mm.

[0073] 4. Pump the clear water after static precipitation treatment into the act...

Embodiment 2

[0075] 1. Pump the mine water to be treated into the coagulation reaction tank. When the liquid level in the coagulation reaction tank reaches 50cm from the top of the pool, stop water intake; the size of the coagulation reaction tank is: 4000×5600×4500mm.

[0076] 2. Turn on the polyaluminum chloride dosing device and the activated carbon dosing device to coagulate the mine water. The dosage of polyaluminum chloride is 70mg / L, and the dosage of powdered lignite-based activated carbon is 4.5mg / L ; Turn on the coagulation and stirring device to fully stir the mine water, first stir at a stirring rate of 220r / min for 3 minutes, then reduce the stirring rate to 65r / min, and stir for 8 minutes.

[0077] 3. The mine water after coagulation flows into the sedimentation tank by itself for static sedimentation. The time for static sedimentation is 15 minutes; the size of the sedimentation tank is: 4000×2000×4500mm.

[0078] 4. Pump the clear water after static precipitation treatment ...

Embodiment 3

[0080] 1. Pump the mine water to be treated into the coagulation reaction tank. When the liquid level in the coagulation reaction tank reaches 50cm from the top of the pool, stop water intake; the size of the coagulation reaction tank is: 4000×5600×4500mm.

[0081] 2. Turn on the polyaluminum chloride dosing device and the activated carbon dosing device to coagulate the mine water. The dosage of polyaluminum chloride is 80mg / L, and the dosage of powdered lignite-based activated carbon is 5.5mg / L ; Turn on the coagulation and stirring device to fully stir the mine water, first stir at a stirring rate of 180r / min for 4 minutes, then reduce the stirring rate to 40r / min, and stir for 15 minutes.

[0082] 3. The mine water after coagulation flows into the sedimentation tank by itself for static sedimentation. The time for static sedimentation is 25 minutes; the size of the sedimentation tank is: 4000×2000×4500mm.

[0083] 4. Pump the clear water after static precipitation treatment...

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Abstract

The invention provides a method for removing residual aluminum in mine water. The method comprises the steps of adding poly aluminum chloride (PAC) and powdered active carbon in the mine water to be treated, removing a suspended substance in the mine water via stirring treatment and standing sedimentation treatment, and absorbing the residual aluminum in the mine water with an active carbon filter. At the same time, the invention provides a device for removing the residual aluminum in the mine water. The device comprises a coagulation reaction tank, a dosing device, a stirring device, a sedimentation tank and the active carbon filter. A content of the residual aluminum in effluent of the mine water treated by the method and the device can be kept below 0.2mg / L stably, and national drinking water standards are satisfied.

Description

technical field [0001] The invention relates to a treatment method for mine water, in particular to a method for reducing residual aluminum in mine water by using polyaluminum chloride and powdered activated carbon and removing residual aluminum in mine water by using activated carbon, belonging to the field of wastewater treatment. Background technique [0002] A large amount of mine water will be discharged during the mining process of coal. In 2010, my country's coal output reached 3.24 billion tons, and the discharge of coal mine water was about 6.1 billion m 3 . According to the pollution characteristics of mine water, mine water is mainly divided into four categories: mine water with high suspended solids, mine water with high salinity (also known as mine brackish water), acid mine water and mine water with special pollutants. Among them, mine water with high suspended solids accounts for the largest proportion, accounting for about 60-70%. Most of my country's coal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
CPCC02F1/283C02F1/5236C02F9/00
Inventor 张春晖谭淑慧彭忱王凯牛夏梦苏佩东李娟
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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