Device for treating arsenic wastewater

Abstract

The invention discloses a device for treating waste water containing arsenic. The device includes a delivery pump, a tubular reactor, a control system and at least one dosing device. The two ends of the tubular reactor are provided with a waste water inlet and a waste water outlet. The delivery pump is connected to the tubular reactor, and the middle section of the tubular reactor is provided with at least one dosing port, and the dosing device is connected to the dosing port through a pipeline, and at least one is installed on the pipeline of the tubular reactor for reflecting Detection probes for acidity and process nodes. The invention has the advantages of simple structure, low investment and operation cost, high degree of automation, high arsenic removal efficiency, small amount of arsenic slag after treatment, etc., and can be used for continuously and efficiently treating arsenic-containing wastewater.

Description

technical field [0001] The invention relates to a waste water treatment device, in particular to a continuous treatment device for arsenic-containing waste water. Background technique [0002] Arsenic (Arsenic) is a well-known chemical element with symbol As and atomic number 33. It is a metalloid known for its toxicity and has various allotropes. Arsenic compounds are protoplasmic poisons with metal-like properties and have a wide range of biological effects. They have been identified as the first class of carcinogens by the US Center for Disease Control and the International Agency for Cancer Research. [0003] In recent years, with the rapid development of industries such as mining and metallurgy, ceramics, leather, and pesticides, the pollution of arsenic in the groundwater environment has become increasingly serious. Endemic arsenicosis has attracted worldwide attention. For this reason, many countries, including China, the United States, Western Europe, Japan, etc., ...

AI Technical Summary

Problems solved by technology

However, at present, the investment and operation costs of chemical treatment of this type of wastewater are high, the utilization rate of chemical agents is low, and a large amount of waste residue is produced with complex components. Not only can arsenic residue not be recycled, but it will bring huge costs to enterprises as hazardous waste treatment. Economic burden, easy to cause secondary pollution

When the adsorption method is used to treat such wastewater, due to the strong adsorption between the adsorbent and the arsenic compound, it often makes the regeneration, recovery and reuse of the adsorbent difficult.

In addition, the competition of coexisting ions should also be considered during wastewater treatment. For example, when there are phosphates, sulfates, silicates, fluorides and other substances in the solution, these substances are easy to compete with arsenic for the adsorption sites, resulting in the adsorption effect. reduce

Therefore, the adsorption method often needs to remove these substances before treatment, which increases the complexity and tediousness of the operation and treatment.

The ion exchange method can only treat wastewater with low concentration, small amount and high recovery value. The treatment process is relatively complicated and the cost is high, so it is difficult to carry out engineering operation

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