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A resin purification treatment method for chlorination tail gas rinsing wastewater

A technology for chlorinated tail gas and purification treatment, which is applied in gaseous discharge wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., to achieve the effect of good purification effect, low price, easy continuous production and automatic control.

Active Publication Date: 2021-08-13
PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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  • Summary
  • 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 Ca Mg Si Al Fe co Content (mg / L) 6.26 6.174 0.7898 0.2741 0.3942 0.3392 Impurities Cu V Ti Cr Ni free chlorine Content (mg / L) 0.4151 2.4294 325.36 0.0223 0.0155 24400

[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 tre...

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PUM

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Abstract

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. The technical problem solved by the present invention is to provide a resin purification treatment method for chlorinated tail gas rinsing wastewater, comprising the following steps: a, adding hydrochloric acid to the wastewater, adjusting the pH of the control system to be 1 to 2, stirring to remove free chlorine b, through the anion exchange resin to remove amphoteric metals and acidic metal impurities through anion exchange resin in the wastewater treated in step a; c, add liquid caustic soda in the wastewater treated in step b, and adjust the pH of the control system to be 9 to 11; d, through The wastewater treated in step c is subjected to cation exchange resin to absorb and remove remaining metal impurities. The wastewater treated by the method of the present invention contains extremely low impurities except a large amount of NaCl, and can be directly recycled by the chlor-alkali industry, which can reduce or even eliminate the contribution of such wastewater to TiCl. 4 The environmental protection pressure brought by the relevant manufacturers of production can also reduce the production cost of the chlor-alkali industry.

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 Patents(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