Electric flocculation deep treatment method for thallium-containing wastewater and electric flocculation device

A treatment method and technology of a treatment device, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as numerous process steps, achieve simple process flow, convenient disassembly and assembly, The effect of easy operation

Pending Publication Date: 2018-08-14
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents mainly rely on the adsorption force to realize the removal of thallium ions, and it is bound to produce a large amount of porous solid matter
In addition, this method utilizes various chemical reagents in large quantities, and the process steps are various

Method used

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  • Electric flocculation deep treatment method for thallium-containing wastewater and electric flocculation device
  • Electric flocculation deep treatment method for thallium-containing wastewater and electric flocculation device
  • Electric flocculation deep treatment method for thallium-containing wastewater and electric flocculation device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, an electro-flocculation advanced treatment method for thallium-containing wastewater includes the following steps:

[0044] (1) Add 50g / m to wastewater containing thallium 3 TMT series precipitants are pretreated to obtain pretreated wastewater with finer particles containing heavy metal ions;

[0045] (2) Treat the pretreated wastewater in step (1) with an electric flocculation treatment device to obtain electric flocculation treatment wastewater;

[0046] (3) Put the electro-flocculation treatment wastewater obtained in step (2) in the air for 15 minutes to obtain oxidation treatment wastewater;

[0047] (4) Add 2g / m to the oxidation treatment wastewater obtained in step (3) 3 The flocculant PAM is filtered after flocculation and sedimentation, and the filtrate is directly discharged.

[0048] The thallium-containing wastewater in this embodiment is wastewater from a manganese tetroxide plant in Shanxi, and its composition and common parameters are as...

Embodiment 2

[0058] A method for advanced treatment of thallium-containing wastewater by electro-flocculation includes the following steps:

[0059] (1) Add 30g / m to wastewater containing thallium 3 Pretreatment with precipitant sodium sulfide to obtain finer particles of pretreated wastewater containing heavy metal ion solid matter;

[0060] (2) Treat the pretreated wastewater in step (1) with an electric flocculation treatment device to obtain electric flocculation treatment wastewater;

[0061] (3) Put the electro-flocculation treatment wastewater obtained in step (2) in the air for 15 minutes to obtain oxidation treatment wastewater;

[0062] (4) Add 2g / L of flocculant PAM to the oxidation treatment wastewater obtained in step (3), flocculate and settle and filter, and the filtrate is directly discharged.

[0063] The thallium-containing wastewater in this embodiment is wastewater from a zinc-based product smelter in Chenzhou. Its composition and common parameters are as follows: thallium: 58.6u...

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PUM

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Abstract

The invention discloses an electric flocculation deep treatment method for thallium-containing wastewater. The electric flocculation deep treatment method comprises the following steps: (1) adding a precipitating agent into the thallium-containing wastewater and pre-treating to obtain pre-treated wastewater; (2) treating the pre-treated wastewater in step (1) by utilizing an electric flocculationtreatment device to obtain electric flocculation treated wastewater; (3) adding a flocculating agent into the electric flocculation treated wastewater obtained by step (2); after flocculating and precipitating, filtering and directly discharging filtrate. The invention further provides the electric flocculation treatment device used for the treatment method. The treatment method disclosed by the invention has a simple technological flow, is easy to operate and manage and has high automation degree and very low cost. According to the electric flocculation treatment device disclosed by the invention, an inner cavity of a reactor adopts a large-top and small-top form; the flow speed of the wastewater flowing through the reactor has gradient changes from bottom to top, and the problems that floc sinks down, caused by a repose angle of the straight-plate reactor and insufficient propelling force in the reactor, can be reduced or eliminated.

Description

Technical field [0001] The invention belongs to the field of waste water, and in particular relates to a method for treating thallium-containing waste water and an electric flocculation device. Background technique [0002] Thallium (Tl) is a typical rare dispersing element. Thallium and its compounds are very toxic, more toxic than arsenic oxide, and have obvious toxic effects on the gastrointestinal tract and kidney, and its toxicity to mammals is much greater than Hg , Pb, As and other elements. Thallium compound is one of the main hazardous wastes listed in the World Health Organization's key restriction list, and it has also been included in my country's priority list of pollutants for control. [0003] The thallium element has both lithophile and sulfur affinity. As a lithophile element, thallium mainly exists in mica, potash feldspar, manganese minerals, alunite, jarosite. As a thiophilic element, thallium enters galena, pyrite, sphalerite, chalcopyrite, pyrite and marcas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20
CPCC02F9/00C02F2101/20C02F1/56C02F1/463C02F1/74C02F1/001
Inventor 杨国超余侃萍李立付向辉姜智超
Owner CHANGSHA RES INST OF MINING & METALLURGY
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