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Hydrofluoric acid wastewater purification treatment process

A wastewater purification and treatment process technology, applied in water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as the inability to completely remove fluoride ions and the impact of suspended solids on purified water quality.

Inactive Publication Date: 2021-05-18
马鞍山蒹葭电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing purification treatment process cannot completely remove fluoride ions, and react to remove residual alkaline substances. A large amount of suspended matter remaining in the supernatant affects the quality of purified water, which needs further improvement

Method used

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  • Hydrofluoric acid wastewater purification treatment process
  • Hydrofluoric acid wastewater purification treatment process
  • Hydrofluoric acid wastewater purification treatment process

Examples

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Embodiment 1

[0029] Such as Figure 1-4 As shown, the present embodiment provides a hydrofluoric acid wastewater purification treatment process, comprising the following steps:

[0030] S1. Alkali washing and filtration: pass hydrofluoric acid wastewater into the liquid inlet pipe 11 of the hydrofluoric acid wastewater purification treatment system, add 20-40wt% lye along the feed hopper 12, turn on the servo motor 16, and the servo motor 16 passes through the joint The shaft device 15 drives the spiral dragon 14 to rotate, so that the hydrofluoric acid wastewater and the lye are mixed more fully and evenly, and the hydrofluoric acid and sodium hydroxide react to form sodium fluoride, and the pH is adjusted to 6±0.5; the first filter plate 17 is used for alkali cleaning After the waste water is filtered to remove solid impurities and sodium fluoride, it flows into the lime water cleaning chamber 2 along the first regulating valve 13;

[0031] S2. Lime water washing and filtration: Lime wa...

Embodiment 2

[0037] Such as Figure 1-4 As shown, the present embodiment provides a hydrofluoric acid wastewater purification treatment system, which is suitable for the hydrofluoric acid wastewater purification treatment process of Example 1, including an alkali cleaning chamber 1, a lime water cleaning chamber 2, A pickling chamber 3, the top side wall of the pickling chamber 3 is connected to the aeration chamber 5 through the first discharge pipe 4, and the side wall of the supernatant of the aeration chamber 5 is connected to the pressure filter chamber through the second discharge pipe 8 7.

[0038] The hydrofluoric acid wastewater purification treatment system of the present embodiment is provided with an alkali cleaning chamber 1, a lime water cleaning chamber 2, and an pickling chamber 3 from top to bottom, and the pickling chamber 3 and the aeration chamber 5 pass through the first discharge pipe 4 connection, the aeration chamber 5 and the pressure filter chamber 7 are connecte...

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Abstract

The invention provides a hydrofluoric acid wastewater purification treatment process, and belongs to the technical field of industrial wastewater treatment. The hydrofluoric acid wastewater purification treatment process comprises the five steps of: alkali washing filtration, lime water washing filtration, acid pickling, aeration defoaming and filter pressing impurity removal, specifically, hydrofluoric acid wastewater is sequentially subjected to alkali liquor washing filtration to remove sodium fluoride and alkaline organic matter, lime water washing filtration to remove calcium fluoride and alkaline organic matter and acid pickling to remove alkaline residues and organic matter; supernatant enters an aeration chamber, after aeration combined activated sludge treatment, a large number of organic matter impurities are subjected to flocculating settling, foam formed by aeration wraps suspended solids to be conveniently discharged in a concentrated mode; the supernatant enters a filter pressing chamber, purified water with the fluorine ion concentration reaching the standard is obtained after filter pressing and impurity removal are conducted. The method is suitable for industrial treatment of hydrofluoric acid wastewater.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a hydrofluoric acid wastewater purification treatment process. Background technique [0002] The discharge of industrial wastewater is increasing, and the discharge of various pollutants is also increasing; among them, hydrofluoric acid wastewater contains a large amount of fluoride ions, acid-base organic matter, and is harmful to the environment and human body. Pre-purification treatment is carried out before the factory discharges to the pipeline network or the environment. [0003] In the prior art, the chemical dosing and precipitation method is usually used to treat the waste water of fluorine chemical industry, mainly using physical and chemical treatment, by adding chemical agents and fluoride ions to form sediment, and finally forming sediment sludge, which is removed in the sedimentation tank. The supernatant after defluoridation enters the disc...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F1/66C02F3/12C02F101/14
CPCC02F1/5236C02F1/66C02F3/1278C02F9/00C02F2101/14Y02W10/10
Inventor 夏铭
Owner 马鞍山蒹葭电子科技有限公司
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