Process device for producing agricultural potassium nitrate through double decomposition circulation process

Abstract

The invention discloses a process device for producing agricultural potassium nitrate through a double decomposition circulation process. Main equipment comprises a potassium chloride dissolving tank 1, a potassium solution pump 2, a filter 3, a potassium cooling and crystallizing tower 4, a crude potassium feed pump 5, a potassium thickener 6, a potassium centrifugal machine 7, a belt conveyor 8, a dryer system 9, an elevator 10, a potassium packaging machine 11, a potassium mother liquor tank 12, a potassium mother liquor pump 13, a vaporization system 14, an ammonium nitrate dissolving tank 15, an ammonium solution pump 16, an ammonium cooling and crystallizing tower 17, an ammonium feed pump 18, an ammonium thickener 19, an ammonium centrifugal machine 20, an ammonium packaging machine 21, a condensate tank 22, a condensate pump 23, an overhead condensate tank 24, an ammonium mother liquor tank 25 and an ammonium mother liquor pump 26. According to the equipment disclosed by the invention, the potassium chloride and ammonium nitrate are taken as raw materials, and agricultural potassium nitrate and agricultural ammonium chloride can be produced by adopting the double decomposition circulation process. The process device disclosed by the invention has the advantages of being high in degree of mechanization, high in automation level, capable of realizing large-scale continuous production of agricultural potassium nitrate, high in product quality and low in production cost.

Description

technical field [0001] The invention relates to a process device for preparing potassium nitrate through double decomposition reaction of ammonium nitrate and potassium chloride. Background technique [0002] Agricultural potassium nitrate is a high-efficiency and high-quality nitrogen-potassium compound fertilizer. It is known as the third generation of potassium fertilizer. After the successful promotion of agricultural potassium nitrate in tobacco planting in my country in 1992, agricultural potassium nitrate has been used in fruits, vegetables, tea trees, It is widely used in high-value crops such as flowers and trees. [0003] At present, my country mainly uses ammonium nitrate and potassium chloride metathesis cycle method to produce agricultural potassium nitrate, and by-product ammonium chloride. Many enterprises in Sichuan, Yunnan and other places have adopted this method to produce agricultural potassium nitrate, but there are generally disadvantages such as backwa...

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Problems solved by technology

Many enterprises in Sichuan, Yunnan and other places have adopted this method to produce agricultural potassium nitrate, but there are generally disadvantages such as backward technology, low degree of mechanization, poor automation control level, small production scale, poor product quality, high cost and energy consumption, and some production Manufacturers are basically workshop-style production, this backward technical level seriously restricts the development of agricultural potassium nitrate production

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