Novel compound fertilizer production process

Abstract

The invention discloses a novel compound fertilizer production process. The novel compound fertilizer production process comprises the following procedures: batching of raw materials; stirring of the raw materials; granulation of the raw materials; cooling of particles; dust collection of the particles; grading of the particles; coating of a finished product; packaging of the finished product; etc. The process is characterized in that in the procedure of batching of the raw materials, urea, monoammonium phosphate and potassium chloride are used as the raw materials; and in the procedure of granulation of the raw materials, a binder composed of magnesium oxide powder and a phosphoric acid solution is added into a granulator in proportion. Compared with the prior art, the invention has the following advantages: the compound fertilizer production process is simplified; compound fertilizer production efficiency is improved; equipment cost is reduced; energy consumption is lowered; and environmental pollution is decreased.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizers, and in particular relates to a novel compound fertilizer production process. Background technique [0002] The traditional compound fertilizer production process mainly includes raw material batching, raw material mixing, raw material granulation, granule drying, granule cooling, granule classification, finished product coating, finished product packaging, etc. Among them, steam boiler heating is required in the raw material granulation stage to realize the smooth granulation process of raw materials; in the granule drying stage, the combustion furnace is heated to dry the moisture contained in the granules to increase the strength of the granules and facilitate storage. This makes the traditional compound fertilizer production process consume a lot of energy. At the same time, using the traditional compound fertilizer production process, it is also necessary to add tail gas treatme...

AI Technical Summary

Problems solved by technology

However, because the supply of liquid ammonia needs to be controlled, the cost of the control device needs to be increased; and the chemical reaction between liquid ammonia and sulfuric acid, monoammonium phosphate and other raw materials is fast, which will make the heat distribution uneven, which will reduce the pelleting rate , the heat generated at the same time will quickly convert liquid ammonia into ammonia gas, which requires the addition of corresponding tail gas treatment devices, making the system complex