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Silicon removal agent and preparation method and application thereof

A technology of medicament and polyaluminum chloride, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of affecting water hardness index and low efficiency of silicon removal, etc. Achieve good research prospects and application value, fast speed, and high silicon removal rate

Active Publication Date: 2020-12-11
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the present invention provides a silicon removal agent, its preparation method and its application to overcome the problems of low silicon removal efficiency and affecting water hardness indicators in the prior art.

Method used

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  • Silicon removal agent and preparation method and application thereof
  • Silicon removal agent and preparation method and application thereof
  • Silicon removal agent and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment is a silicon removal agent CG-1, which is composed of the following components by weight: 75 parts of polyaluminum chloride, 12 parts of sodium metaaluminate, 6 parts of polyaluminum sulfate, 5 parts of polyferric sulfate, activated alumina 2 servings. Weigh the raw materials, grind, stir, and fully mix to prepare.

[0034] An oilfield in Dongying, Shandong Province conducts advanced treatment of heavy oil sewage, and reuses the thermal recovery boiler after reaching the standard. According to the Specifications for Design of Feedwater Treatment of Steam Generators and SY 5854-2012 "Safety Specifications for Wet Steam Generators Special for Oilfields", the content of silicate in boiler water (in terms of SiO 2 count) cannot exceed 50mg / L. The silicon content in sewage seriously exceeds the standard.

[0035] The silicon-removing agent CG-1 prepared in this example was used to treat silicon-containing sewage to investigate the treatment capacity and tr...

Embodiment 2

[0038] This embodiment is a silicon removal agent CG-2, which consists of the following components by weight: 73 parts of polyaluminum chloride, 14 parts of sodium metaaluminate, 5 parts of polyaluminum sulfate, 6 parts of polyferric sulfate, activated alumina 2 servings. It is prepared by weighing raw materials with a fixed mass fraction, grinding, stirring, and fully mixing. The same silicon-containing sewage as in Example 1 was treated with the silicon-removing agent, and the treatment method was the same as in Example 1. The results are shown in Table 1.

Embodiment 3

[0040] This embodiment is a silicon removal agent CG-3, which is composed of the following components by weight: 74 parts of polyaluminum chloride, 12 parts of sodium metaaluminate, 8 parts of polyaluminum sulfate, 5 parts of polyferric sulfate, activated alumina 1 serving. It is prepared by weighing raw materials with a fixed mass fraction, grinding, stirring, and fully mixing. The same silicon-containing sewage as in Example 1 was treated with the silicon-removing agent, and the treatment method was the same as in Example 1. The results are shown in Table 1.

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Abstract

The invention provides a silicon removal agent and a preparation method and application thereof, and belongs to the technical field of silicon-containing sewage treatment. The silicon removal agent comprises the following components in parts by weight: 73-77 parts of polyaluminum chloride, 10-14 parts of sodium metaaluminate, 4-8 parts of polyaluminum sulfate, 3-7 parts of polyferric sulfate and 1-3 parts of activated aluminum oxide. After the silicon-containing sewage is treated by adopting the silicon removal agent, the soluble silicon in the sewage is reduced to a certain degree, the recycling of the sewage is not influenced, near-zero emission is achieved, and the silicon removal agent has multiple effects of silicon removal, coagulation, turbidity removal and the like. The silicon removal agent is high in purity, less in impurity, less in dosage, low in sludge amount, high in silicon removal efficiency, free from influence of water quality change of sewage, very high in operationstability, low in operation cost and safe and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a silicon-removing agent, a preparation method and an application thereof. Background technique [0002] In the field of chemical industry, sewage recycling has become the trend of industrial water use, which can improve the pretreatment of influent water quality, remove or reduce suspended solids, colloids and various ions in water, and meet the water requirements. Among them, the coal chemical industry itself brings a high content of soluble silicon to the sewage, which brings a serious burden to the reverse osmosis system in the later stage. great difficulty. In the field of oil exploitation, SiO in heavy oil sewage is 2 It is easy to form dense and hard silicate scale in places with high heat load or in furnace tubes with poor water circulation, which seriously affects the heat transfer efficiency and safe operation of equipment. In order to improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/60C02F1/52
CPCC02F1/60C02F1/5245
Inventor 郑搏英朱希坤石伟杰柯建怡丁海静张襄张亮亮崔秀菊何永峰李佩鲜
Owner 神美科技有限公司
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