Method for preparing potassium perchlorate powder by using closed-loop spray dryer

Abstract

The invention discloses a method for preparing potassium perchlorate powder by using a closed-loop spray dryer, which comprises the following steps: preparing a potassium perchlorate solution by usingpotassium perchlorate solid as a raw material, and spraying the potassium perchlorate solution by using the closed-loop spray dryer to obtain the potassium perchlorate powder. The potassium perchlorate is used as a raw material; and the potassium perchlorate powder is prepared through the closed-loop spray dryer. The closed-loop spray dryer is small in size, oxygen isolation is achieved, the safety and reliability of the production process are guaranteed, the production efficiency is high, continuous operation can be achieved, the price is low, industrial production is easy, and the preparedpotassium perchlorate is small in particle size, high in raw material utilization rate and low in production cost. The equipment investment is low, the production process is simple and the period is greatly shortened; the whole production process is almost zero-emission and is green and environment-friendly. The method has the characteristics of simplicity, high efficiency, low energy consumption,low cost, safety, low impurity content and small particle size.

Description

technical field [0001] The invention belongs to the technical field of potassium perchlorate production, in particular to a method for preparing potassium perchlorate powder by utilizing a closed-circuit circulation spray dryer. Background technique [0002] Potassium perchlorate is an inorganic substance of white powder or orthorhombic crystals, which has strong oxidizing properties. It may cause combustion and explosion when it contacts or mixes with organic substances, reducing agents, and flammable substances. It will cause an explosion when it is shaken, so it needs to be sealed and kept in a cool place. Density 2.52g / cm 3 , melting point 610°C, molecular weight 138.55, soluble in water (1.5g / 100g), insoluble in ether and ethanol, more stable than potassium chlorate, decomposed into potassium chloride and oxygen at the melting point, when potassium chloride, bromine In the presence of potassium chloride, potassium iodide, copper, iron, etc., the decomposition reaction...

AI Technical Summary

Problems solved by technology

However, the main disadvantages of this patent application method are: ① much equipment is required, the cycle is long, the production process is cumbersome and complicated, and the production cost is high; ② the raw materials need to be heated and melted, and the energy consumption is large; ③ the process requires the product to be kept in a saturated state and recycled , there is a risk of introducing impurities; ④The fluidized bed dryer used for drying does not isolate oxygen during the process, which is easy to cause explosion and is unsafe, and at the same time produces potassium perchlorate waste gas, polluting the environment; ⑤The particle size of the product is more than 200 μm, and the particle size is too large , unable to meet the needs of enterprises for smaller particle size potassium perchlorate

However, the main disadvantages of this patent application method are: ①The process flow is cumbersome and complicated, the cycle is long, and a lot of manpower is required; ②The processing process requires electrolysis and repeated heating, and the energy consumption is too large; ③The production process uses heating, electrolysis, crystallization, drying There are too many large-scale devices such as crushing and crushing, the cost of equipment investment is too high, and the energy consumption is large; ④The production process is open in the atmosphere, which is easy to cause explosion and is unsafe; ⑤The purity of the product is lower than 99%, and the content of impurities is high. Further purification is required for production and use, which will increase the cost of the enterprise

But, the main shortcoming of this patent application method is: 1. the product that this method makes is the product after the crystallization, and particle size, moisture content have not reached the requirement of industrial demand, can not directly be used as industrial production raw material; Purification, the impurity content of the product is too high; ③The centrifugation and crystallization of the process will produce a large amount of chemical waste liquid, which will pollute the environment if it is discharged directly; if it is discharged after treatment, the cost will be too high; ④The process uses reaction devices, cooling devices, centrifuges Equipment, freezing equipment, crystallization equipment, equipment investment is high and the production cycle is long, requiring a lot of manpower

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