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Purifying treatment method for chloridized tail gas leaching wastewater

A technology for chlorinated tail gas and purification treatment, which is applied in gaseous discharge wastewater treatment, multi-stage water treatment, chemical instruments and methods, etc., to achieve the effects of eliminating environmental pressure, fewer treatment steps, and lower treatment costs.

Inactive Publication Date: 2018-05-08
PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For existing treatment of TiCl 4 The defects of waste water produced by chlorination process tail gas leaching, the invention provides a new purification treatment method for chlorination tail gas rinsing waste water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 adopts the inventive method to process chlorination tail gas rinsing waste water

[0032] 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:

[0033] Table 1

[0034] Impurities

[0035] According to the chlorination tail gas rinse waste water treatment method of the present invention, its process is:

[0036] 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 was quickly added to the wastewater. During the process, as the pH...

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Abstract

The invention belongs to the technical field of industrial wastewater treatment, and specifically relates to a purifying treatment method for chloridized tail gas leaching wastewater. The technical problem to be solved of the invention is to provide the purifying treatment method for chloridized tail gas leaching wastewater and the method comprises the following steps: a, adding hydrochloric acidinto the wastewater to regulate the pH (Potential of Hydrogen) value of a control system to be 1 to 2, stirring and removing free chlorine; b, adding alkali liquor to regulate the pH value of the control system to be 3 to 4, and filtrating to remove the solid; c, then adding alkali liquor again to regulate the pH value of the control system to be 9 to 11, and filtrating to remove the solid, wherein the obtained filter liquor is a purified solution. The wastewater subjected to purification through the treatment method provided by the invention is extremely low in impurity content, except for alarge amount of NaCl, and can be recycled directly by the chlor-alkali industry, not only can the environmental protection pressure, which is brought by the wastewater, on related TiCl4 manufacturersbe reduced or even eliminated, but also the manufacturing cost of the chlor-alkali industry is reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a 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 the ma...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/18C02F101/12
CPCC02F1/001C02F1/44C02F1/52C02F1/66C02F9/00C02F2101/12C02F2103/18C02F2301/08
Inventor 曹旭东
Owner PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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