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Oxidation precipitation method for boron

A hydrogen peroxide and calcium chloride technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of complex boron removal process and low boron removal efficiency, and achieve technological Simple, improve boron removal efficiency, no secondary pollution effect

Pending Publication Date: 2021-10-29
四川桓辰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a boron oxidation precipitation method to solve the problem that the current boron removal process is complicated and the boron removal efficiency is not high

Method used

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  • Oxidation precipitation method for boron

Examples

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Embodiment 1

[0025] A boron oxidation precipitation method, adding hydrogen peroxide to the boron-containing waste liquid to react for a period of time, then adjusting the pH of the boron waste liquid to the range of 12-13, adding calcium chloride to react for a period of time, and then adding sulfuric acid to the boron waste liquid Aluminum, after another 10 minutes of reaction, drop the PAM reagent, and let the flocs settle.

[0026] Wherein, the reaction process is carried out in a container, and the container is placed on a magnetic stirrer, so that the magnetic stirrer is continuously stirred during the reaction process.

Embodiment 2

[0028] A boron oxidation precipitation method, adding 0.5-2.5g / L hydrogen peroxide to the boron-containing waste liquid to react for 30-90min, then adjusting the pH of the boron waste liquid to the range of 12-13, and then adding calcium chloride to make chlorine The concentration of calcium chloride in the boron waste liquid is 2.0-4.0g / L, after reacting for 20-60min, add aluminum sulfate to the boron waste liquid, so that the concentration of aluminum sulfate in the boron waste liquid is 2.0-4.0g / L, and then After 10 minutes of reaction, 3 drops of 0.2% PAM reagent were added dropwise, and the flocs were allowed to settle.

Embodiment 3

[0030] A boron oxidation precipitation method, adding 1.5g / L hydrogen peroxide to the boron-containing waste liquid to react for 30 minutes, then adjusting the pH of the boron waste liquid to the range of 12-13, and then adding calcium chloride to make the calcium chloride in the boron The concentration in the waste liquid is 3.5g / L. Add aluminum sulfate to the boron waste liquid after reacting for 30 minutes, so that the concentration of aluminum sulfate in the boron waste liquid is 3.0g / L. After another ten minutes of reaction, add 3 drops of 0.2% PAM reagent, let the flocs settle.

[0031] Using this scheme to remove boron from wastewater can increase the boron removal efficiency from the original 44.5% to 88.4%, which greatly improves the boron removal efficiency. Requirements, and this scheme is simple in process, low in cost, and does not produce secondary pollution.

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Abstract

The invention relates to the technical field of sewage treatment methods, in particular to an oxidation precipitation method for boron. The oxidation precipitation method comprises the following steps: adding hydrogen peroxide into boron-containing waste liquid for a reaction for a period of time, then adjusting the pH value of the boron-containing waste liquid to 12-13, then adding calcium chloride for a reaction for a period of time, then adding aluminum sulfate into the boron-containing waste liquid, carrying out reacting for ten minutes, then dropwise adding a PAM reagent, and carrying out standing to precipitate floc. The problems that an existing boron removal technology is complex and boron removal efficiency is not high are solved in the invention.

Description

technical field [0001] The invention relates to the technical field of sewage treatment methods, in particular to a boron oxidation precipitation method. Background technique [0002] Boron and borides are widely used in industries such as semiconductors, agriculture, glass, medicine and health, and nuclear power plants, and are closely related to human production and life. Boron is an essential element for animals and plants. The World Health Organization (WHO) recommends that the average basic requirement for adults is 0.375mg / day. However, excessive boron intake will affect the human reproductive system, developmental system and central nervous system; it will poison plant growth, cause necrosis of plant leaves, affect clone tissues, interfere with cell division, and stagnate the growth process. [0003] In 2010, the World Health Organization (WHO) stipulated that the limit of boron in drinking water was 0.5mg / L. The first and second standards of the "Shanghai Comprehens...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/10
CPCC02F9/00C02F2101/108C02F1/722C02F1/66C02F1/56C02F1/5236
Inventor 刘辉
Owner 四川桓辰环保科技有限公司
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