Tower pulping production system and process for tower production compound fertilizers

Abstract

The invention discloses a tower pulping production system and process for tower production compound fertilizers. The production system comprises a grinder and a batching system, wherein the grinder is connected with the batching system; a mixing and stirring heating tank, a slurry circulation heating tank, a filter, a grinding circulating pump, a slurry delivery pump and a rotary granulator are sequentially connected in series behind the batching system; the mixing and stirring heating tank is connected with the slurry circulation heating tank; and the slurry delivery pump is connected with the granulator. The invention discloses a tower pulping production process for tower production compound fertilizers. The process is formed by integrating key technologies such as batching, pulping, circulation heating, filtering and grinding and equipment technologies. Therefore, the yield of the product is over 90 percent, the productions safety is improved, the environmental pollution and influence on health of personnel are reduced, the equipment and civil engineering investment is greatly reduced, and the equipment is convenient to maintain. Therefore, the technology has considerable economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of high-tower production of compound fertilizer pulping, in particular to a production system and process for high-tower production of compound fertilizer under-tower pulping. Background technique [0002] High-tower urea-based or nitro-based compound fertilizer and a preparation method thereof, the method comprises transporting urea or ammonium nitrate, phosphate fertilizer, potash fertilizer and fillers to each feed bin at the top of the tower by elevators; After being measured by the electronic scale on the top, put it into the melting device for melting to make urine or ammonium nitrate solution; put the measured phosphate fertilizer, potassium fertilizer and filling material into the melting tank and mix with urine or ammonium nitrate solution After the prepared slurry is sprayed through the granulation nozzle, the high tower is cooled into granules and sieved to obtain urea-based or nitro-based compound fertil...

AI Technical Summary

Problems solved by technology

[0008] But the processing method of high tower production compound fertilizer in the above-mentioned prior art still has the following technical defects: and the production system and technology of pulping under the high tower production compound fertilizer tower are not reported

[0009] (1) Phosphate fertilizers, potash fertilizers, other nitrogen fertilizers, and fillers in the high-tower granulation technology are transported to the top of the granulation tower with a height of about 100 meters by a special hoist or bucket elevator. The device has a large capital investment and high power consumption

[0010] (2) Urea or ammonium nitrate and other materials are measured in solid form and begin to be heated and melted at the top of the tower. Due to limited space, it is difficult to maintain the tower top equipment, and the infrastructure investment at the top of the tower is large.

[0011] (3) Pulping at the top of the high-tower granulation tower has poor safety. In recent years, different manufacturers have experienced personnel poisoning or death during the pulping operation at the top of the tower. The main reason is that the space at the top of the tower is small and evacuation is inconvenient.

[0012] (4) The pulping at the top of the tower is limited by the site, and the equipment layout is difficult. The pulping is not complete, resulting in the quality of the product particles not meeting the higher requirements, and the return rate is high

[0013] (5) The continuity of compound fertilizer production is poor. The main reason is: Insoluble impurities brought into the system with powdered monoammonium phosphate, potassium and other materials cause blockage; in addition, unevenness occurs during the emulsification process of solid raw materials and molten liquid, Easy to form agglomerates to block the nozzle

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