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Preparation technology of efficient polymeric aluminum chloride for wastewater treatment

A technology for polyaluminum chloride and wastewater treatment, which is applied in aluminum chloride, flocculation/sedimentation water/sewage treatment, aluminum halide, etc. It can solve the problems of low utilization rate of raw materials, pollution, unstable product quality, etc., and achieve the treatment cost. Savings, guaranteed safety, good thermal stability and solubility

Inactive Publication Date: 2014-04-23
TIANJIN SHUIJIE PURIFICATION MATERIAL CO LTD
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Problems solved by technology

In addition, the current domestic PAC production process is mostly intermittent production, with serious pollution, low raw material utilization rate, and unstable product quality. The development of efficient continuous production process will definitely become a hot spot in industrial production research in the future.

Method used

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Embodiment Construction

[0022] Embodiments of the present invention are described in further detail below:

[0023] The preparation process of a kind of high-efficiency polyaluminum chloride used for wastewater treatment of the present invention is: the raw material of the present invention preferably adopts industrial products with relatively high purity, and the raw material hydrochloric acid is diluted to the required concentration, and the concentration of pure hydrogen chloride is the best The hydrochloric acid is heated to 90-110 ° C in the reaction kettle, and the aluminum hydroxide is added to react at a constant temperature for 1 to 2 hours. The aluminum oxide content of the aluminum hydroxide is greater than 63%. Add a polymerization modifier (calcium aluminate, aluminum sulfate or high alumina ash) to carry out polymerization, and react at a high temperature of 50-180°C and a pressure of 0.5MPa to prepare a polyaluminum chloride solution with a basicity of 41.6-48.6%; After the reaction, t...

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PUM

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Abstract

The invention relates to a preparation technology of efficient polymeric aluminum chloride for wastewater treatment. The preparation technology is mainly technologically characterized by comprising the following steps: with hydrochloric acid, aluminum hydroxide and a polymerization regulator as main raw materials, producing a liquid solution by a high-temperature, low-pressure and alkaline adjustment two step method; and producing powdery solid by a centrifuging or pressure spray drying and curing environment-friendly technology. The preparation technology disclosed by the invention is advanced in process, high in production efficiency, fast in purification speed, good in treatment effect, wide in application field, low in treatment cost, energy-saving and environment-friendly, and has important application and popularization values by adjusting the raw material ratio in production.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a process for preparing high-efficiency polyaluminum chloride for wastewater treatment. Background technique [0002] In recent years, with the development of society and economy, the demand for industrial and agricultural water has increased sharply, and the problems of water resource waste and water resource pollution have become increasingly serious, making the problem of water resource shortage in my country more prominent. The cut-off of the Yellow River, the decline of the groundwater level, and the aggravation of water system pollution have already warned us that we must pay sufficient attention to the problems of water resources and water pollution in our country. Otherwise, it will seriously restrict the sustainable development of our country's social economy. For this reason, the State Council's "Decision on Several Issues Concerning Environmental Protecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/58C02F1/52
Inventor 陈象忠
Owner TIANJIN SHUIJIE PURIFICATION MATERIAL CO LTD
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