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
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[0041] Example one
[0042] See figure 1 This 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 a waste acid supply pipe 6 and a neutralization agent supply pipe 7, The interior of the neutralization reaction tank 1 includes a pre-mixing zone 2, aeration mixing zone 3, a mechanical stirring and mixing zone 4, and an anti-short flow tank 5, and the pre-mixing zone 2 passes through the neutralization reaction tank 1 The inlet section is formed by the first partition 12, which is used for stirring and mixing the waste acid and the neutralizing agent, and premixing to form a reaction mixture solution. The iron ions in the waste acid begin to form hydrogen hydroxide in the reaction of the waste acid and the neutralizing agent. Iron precipitation; The effluent anti-short flow tank 5 is formed by settin...
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[0045] Example two
[0046] See figure 2 And please combine figure 1 This embodiment provides a hydrochloric acid regeneration desiliconization and neutralization reaction method. The hydrochloric acid regeneration desiliconization and neutralization reaction device described in Example 1 can be used. The reaction method includes the following steps:
[0047] Step one, the inflow of waste acid and neutralizing agent (for example, ammonia) into the pre-mixing zone 2 to form a reaction mixture solution. When the pH value of the reaction mixture solution is greater than 3, the ferrous ions in the waste acid begin to precipitate ferrous hydroxide (medium). 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 entire pre-mixing zone 2 is 3-7 min.
[0048] Step two, the reaction mixture solution flows downwards into the aeration mixing zone 3. The air bubbles blown upward fr...
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