Device and method for preparing potassium sulphate

Abstract

The invention provides a device for preparing potassium sulphate. The device comprises a membrane stack, a cathode, an anode, a first electrolyte sampling device, a second electrolyte sampling device, a first saline solution sampling device, a second saline solution sampling device, a third saline solution generation device, a fourth saline solution generation device and a power supply. The cathode is connected with the negative electrode of the power supply. The anode is connected with the positive electrode of the power supply. The cathode and the anode are arranged on the two sides of the membrane stack respectively. Six partition chambers including the cathode chamber, the anode chamber, the first salt chamber, the second salt chamber, the third salt chamber and the fourth salt chamber are formed in the membrane stack. According to the device for preparing potassium sulphate, ammonium sulfate serves as a supply source of sulfate ions, potassium chloride is converted into potassium sulphate, the whole process can be conducted at the normal temperature, the energy consumption is low, no strong corrosive substances are generated, and corrosion to devices is small. The process flow is simple, and the mechanization and automation are easy to achieve.

Description

technical field [0001] The invention relates to the technical field of chlorine-free potassium fertilizer production, in particular to a device and method for preparing potassium sulfate. Background technique [0002] Potassium sulfate is a chlorine-free potassium fertilizer that not only contains a high content of K 2 O, also contains 18% sulfur, and the potassium sulfate index is low, which has a relatively small impact on the salinity of the soil. In addition, potassium sulfate also has some unique advantages: no agglomeration, no moisture absorption, and easy transportation. Therefore, potassium sulfate is an excellent potassium source for supplementing potassium in crops that lack potassium and avoid chlorine (such as tobacco, tea, citrus, etc.). [0003] According to the source of raw materials, the method for preparing potassium sulfate includes three major categories: 1. producing from natural potassium sulfate ore or solid potassium ore; 2. extracting from sulfate-...

AI Technical Summary

Problems solved by technology

The metathesis method has a low reaction temperature and a simple process, but its main problem is that the mother liquor turnover is large and corrosive, and it will cause great damage to the equipment.

[0009] Although the existing technology can prepare potassium sulfate products with better quality, there are more or less problems in the preparation process such as high energy consumption, high investment costs, serious corrosion of equipment, pollution, and complicated process flow.

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