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Resin purifying treatment method for chlorinated tail gas leaching wastewater

A technology for chlorinated tail gas and purification treatment, which is applied in the direction of gaseous effluent wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., to achieve the effect of eliminating environmental protection pressure, low raw material cost, and easy access to instruments

Active Publication Date: 2018-06-22
PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For existing processing TiCl 4 Due to the defects of waste water produced by chlorination process tail gas leaching, the invention provides a new resin purification treatment method for chlorination tail gas leaching waste water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 adopts the inventive method to process chlorination tail gas rinsing waste water

[0043] TiCl in the chlorination workshop of a sponge titanium factory 4 The alkaline tail gas washing wastewater produced by the chlorination production process contains a large amount of metallic impurities such as Ca, Mg, Al, Fe, Co, Cu, V, Ti, Cr, Ni and non-metallic impurities such as Si. Coupled plasma emission spectrometer and other detection, the results are shown in Table 1:

[0044] Table 1

[0045] Impurities

[0046] According to the chlorination tail gas rinsing wastewater resin purification treatment method of the present invention, the above-mentioned wastewater is processed, and its process is:

[0047] 1. Since the waste water after treatment will be recycled by the chlor-alkali industry, in order to avoid bringing in impurities, the acid used is a standard industrial synthetic hydrochloric acid with a total acidity of ≥31%. First, hydrochloric acid...

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Abstract

The invention belongs to the technical field of treatment of industrial wastewater and particularly relates to a resin purifying treatment method for chlorinated tail gas leaching wastewater. For solving the technical problem, the invention provides the resin purifying treatment method for the chlorinated tail gas leaching wastewater, the resin purifying treatment method comprises the following steps: a, adding hydrochloric acid into the wastewater, regulating and controlling the pH value of a system to 1-2, stirring and removing free chlorine; b, using an anion exchange resin to adsorb and remove acid and alkaline metals and acid metal impurities in the wastewater treated in the step a; c, adding liquid caustic soda into the wastewater treated in the step b, regulating and controlling thepH of the system to 9-11; and d, using a cation exchange resin to adsorb and remove the rest of metal impurities in the wastewater treated in the step c. The wastewater treated through the method contains a large quantity of NaCl, the content of other impurities is quite low, the wastewater can be directly recycled by the chlor-alkali industry, so that the environmental protection pressure, caused by the wastewater, on the relevant manufacturers producing TiCl4 is reduced or eliminated, and the production cost of the chlor-alkali industry is also lowered.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a resin purification treatment method for chlorination tail gas rinsing wastewater. Background technique [0002] TiCl 4 It is the main intermediate raw material of titanium industry such as sponge titanium. Currently, the industrial production of TiCl 4 Generally, it is carried out by boiling chlorination and molten salt chlorination. During the production process, the tail gas generated due to various reasons such as side reactions of raw material impurities, low main reaction efficiency, and insufficient subsequent condensation generally contains HCl, Cl 2 , CO, CO 2 、SiCl 4 、TiCl 4 It is also mixed with a large amount of solid particles. In order to purify the tail gas to meet the discharge standard, a large amount of alkaline wastewater will be generated after the tail gas is washed with liquid alkali. This kind of wastewater is also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/18
CPCC02F1/42C02F1/66C02F9/00C02F2001/422C02F2103/18C02F2209/29C02F2301/08
Inventor 曹旭东
Owner PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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