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Neutralization device and method for hydrochloric acid regeneration and desiliconization

A reaction device and reaction technology, which are used in chemical instruments and methods, chlorine/hydrogen chloride purification, water/sewage multi-stage treatment, etc., can solve the problem of unstable neutralization reaction of waste acid, low efficiency, and quality operation of desiliconization of acid regeneration system Instability and other problems, to achieve the effect of being conducive to recycling, ensuring efficiency, and improving mixing and reaction efficiency

Inactive Publication Date: 2013-04-03
BAOSTEEL ENG & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide a hydrochloric acid regeneration desiliconization neutralization reaction device and method to solve the problem of unstable neutralization reaction of waste acid and low efficiency, which lead to unstable operation of desiliconization quality and low efficiency of acid regeneration system

Method used

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  • Neutralization device and method for hydrochloric acid regeneration and desiliconization
  • Neutralization device and method for hydrochloric acid regeneration and desiliconization

Examples

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Embodiment 1

[0042] seefigure 1 , the present embodiment provides a hydrochloric acid regeneration desiliconization neutralization reaction device, including a neutralization reaction tank 1, and the inlet section of the neutralization reaction tank 1 is respectively connected with the waste acid supply pipe 6 and the neutralization agent supply pipe 7, The interior of the neutralization reaction tank 1 includes a premixing zone 2, an aeration mixing zone 3, a mechanical agitation mixing zone 4 and a liquid outlet anti-short flow tank 5, and the premixing zone 2 passes through the The inlet section is provided with a first partition 12, which is used for stirring and mixing the waste acid and the neutralizing agent, pre-mixing to form a reaction mixture solution, and the iron ions in the spent acid start to form oxyhydroxide during the reaction of the spent acid and the neutralizing agent. Iron precipitation; the liquid outlet anti-short flow tank 5 is formed by setting a second partition 1...

Embodiment 2

[0046] see figure 2 , and please combine figure 1 , the present embodiment provides a hydrochloric acid regeneration desiliconization neutralization reaction method, the hydrochloric acid regeneration desilication neutralization reaction device as described in Example 1 can be used, and the reaction method includes the following steps:

[0047] In step 1, the waste acid and neutralizing agent (such as ammonia water) flow into the premixing zone 2 to form a reaction mixture solution. When the pH value of the reaction mixture solution is greater than 3, the iron ions in the waste acid begin to form ferrous hydroxide precipitates (in and reaction), and make the reaction mixture solution flow downward during the stirring process, and the reaction residence time of the reaction mixture solution in the whole pre-mixing zone 2 is 3-7min.

[0048] Step 2, the reaction mixed solution flows downward into the aeration mixing zone 3, and the air bubbles blown upward by the aeration tube...

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Abstract

The invention discloses a neutralization device and a neutralization method for hydrochloric acid regeneration and desiliconization. The device comprises a neutralization kettle; an inlet section of the neutralization kettle is connected with a waste acid supply pipe and a neutralizing chemical supply pipe respectively; a premixing zone, an aerating and mixing zone, a mechanical stirring and mixing zone and a short effluent stream resisting groove are contained inside the neutralization kettle; the premixing zone is formed by arranging a first clapboard in the inlet section of the neutralization kettle; the short effluent stream resisting groove is formed by arranging a second clapboard in an outlet section of the neutralization kettle; the mechanical stirring and mixing zone is located between the first clapboard and the second clapboard; and the aerating and mixing zone is below the premixing zone, the aerating and mixing zone and the short effluent stream resisting groove and connects the three with each other. According to the invention, the mixing efficiency and the reaction efficiency of the neutralization and oxidization of reactive mixed solution are increased, and the stability of ferric hydroxide is guaranteed, so that the desiliconization efficiency of the waste acid is guaranteed and the recycling of the waste acid is benefited.

Description

technical field [0001] The invention relates to a hydrochloric acid regeneration desiliconization neutralization reaction device and method. Background technique [0002] At present, a neutralization reaction tank is generally installed in the desiliconization process of hydrochloric acid regeneration, and the neutralization reaction is carried out by adding neutralizing agents such as ammonia water. When the waste acid such as waste hydrochloric acid is neutralized to a pH value greater than 3, the waste acid Iron ions start to generate hydroxide precipitated particles. By exposing to air, ferrous hydroxide is rapidly oxidized into ferric hydroxide, and ferric hydroxide forms a large number of flocs during the precipitation process, and these flocs will absorb waste acid The silica in the waste hydrochloric acid is quickly and effectively settled to form sludge, which is the basic principle of desiliconization of waste hydrochloric acid. [0003] But the plug-flow reaction...

Claims

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Application Information

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IPC IPC(8): C01B7/07C02F9/04
Inventor 周光升陈琦陆正华
Owner BAOSTEEL ENG & TECH GRP
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