Material-returning flow manufacturing process for heavy potassium pyrophosphate

Abstract

The invention discloses a material-returning flow manufacturing process for heavy potassium pyrophosphate. The material-returning flow manufacturing process comprises the following steps: step 1, erection of a material-returning flow-line device; step 2, drying treatment in the material-returning flow-line device; step 3, inputting of potassium pyrophosphate; step 4, dust suction and removal; step5, screening treatment; step 6, sorting, conveying and bagging; and step 7, boxing and storage. In the step 1, the material-returning flow-line device is erected at one side of a potassium pyrophosphate production flow line; and in the step 2, before the material-returning flow-line device is used in a material-returning flow, an induced draft fan is energized to work, so a conveyor belt is always in a dry environment. According to the invention, through technical modification, an overall transportation equipment structure is low in cost, so the cost of investment is reduced; through a screening plate, screening of the potassium pyrophosphate with different sizes can be realized, so a product has more regular appearance granularity, facilitates classification for sealed storage and collection, and is convenient for transportation in a later period; and the interior of the flow-line device is dried.

Description

technical field [0001] The invention relates to the technical field of potassium pyrophosphate return process technology, in particular to a production process of heavy potassium pyrophosphate return process. Background technique [0002] Potassium pyrophosphate refers to the potassium salt of pyrophosphate; a representative phosphate in poly(poly)phosphate fertilizers; it is usually a group of phosphorus-containing compounds formed by the reaction of pyrophosphoric acid and potassium hydroxide. The main use of potassium pyrophosphate is to replace potassium cyanide for cyanide-free electroplating. With the development of national industrial modernization, the demand for potassium pyrophosphate is increasing day by day. In industry, it is also used in surface treatment, high-grade detergent, paint coating, cleaning agent, dispersant, buffer, etc.; in food industry, it is used as emulsifier, tissue improver, chelating agent, quality improver, etc.; potassium pyrophosphate ca...

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Problems solved by technology

In industry, it is also used in surface treatment, high-grade detergent, paint coating, cleaning agent, dispersant, buffer, etc.; in food industry, it is used as emulsifier, tissue improver, chelating agent, quality improver, etc.; potassium pyrophosphate can also be produced from phosphoric acid The preparation of dipotassium hydrogen, wherein the return process of potassium pyrophosphate is an important step in the processing of potassium pyrophosphate, but the structure of the transportation equipment in the existing potassium pyrophosphate processing flow is relatively simple, and the cost of the traditional transportation equipment structure is high, which increases the investment cost. The appearance of the obtained product is irregular in particle size, and it is prone to moisture absorption. The dust pollution in the product in the traditional process is relatively large, and the environmental protection efficiency is not high

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