Production method for solid polyferric sulphate

Abstract

The invention belongs to the field of water treatment, and particularly discloses a production method for high-purity solid polyferric sulphate, wherein ferrous sulphate and concentrated sulphuric acid are used as raw materials, and ferrous sulphate is treated at first in a reaction kettle; the treatment method comprises the following steps of: uniformly mixing 7-11% of solid acid and 1-2% of rare earth in ferrous sulphate; pouring the ferrous sulphate in the heating area of the reaction kettle; and feeding the treated ferrous sulphate in the reaction area of the reaction kettle, and performing reaction polymerization. The solid polyferric sulphate (SPFS) produced by the production method disclosed by the invention is high in purity, high in iron content of greater than 23%, high in heating amount after being contacted with water, serious in reaction and capable of generating a dynamic energy. The product can be directly poured in water and used for performing a purification treatment on water, simple in use method, low in dosage, and remarkable in water treatment effect.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a production method of solid polyferric sulfate. Background technique [0002] my country's water pollution control is seriously lagging behind. One of the important reasons is that the purification effect of water purification materials is not ideal, and some purification materials themselves contain toxins, causing secondary pollution. Compared with other water purification materials, solid polyferric sulfate has many advantages , Therefore, many types of water purification materials can be replaced by solid polyferric sulfate. [0003] At present, there are many types and methods of raw materials, processes, equipment, and catalysts for producing polyferric sulfate in China, and there are countless papers and academic materials on polyferric sulfate research. Polyferric sulfate products are widely used in various fields at home and abroad. There are many kinds of invention pate...

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Problems solved by technology

[0005] In the above-mentioned production method, the purity of the solid polyferric sulfate produced is not high, and if it is to be purified, the workload and production cost will be increased. When it is combined with water, the calorific value is small, the reaction is mild and the kinetic energy is insufficient. If it is directly added In the water, the heat it emits is not enough to kill bloodworms and microorganisms in the water, and the kinetic energy is not enough to achieve the purpose of fully mixing with the water, and the flocculation is slow, so it is first dissolved into a liquid, and then added to the water. to stir

The solid polyferric sulfate produced by these processes is complicated to use, consumes a lot of energy, and sometimes needs to be stirred again after dosing to achieve the purification effect, and does not use the heat when the chemical is combined with water to kill microorganisms such as red nematodes in the water. , water treatment effect is not significant

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