A multi-stage nicotinamide melt spray granulation tower and its operation method

Abstract

The invention provides a multi-grade nicotinamide fusion-spraying granulation tower and an operation method thereof. The multi-grade nicotinamide fusion-spraying granulation tower comprises a first-class tower and a second-class tower. An atomization nozzle assembly is arranged in a shower area of the first-class tower. A plurality of suspended plates are vertically arranged in a suspension area. The suspended plate is uniformly provided with a large number of sieve holes. The suspension area is divided into a plurality of partition zones. The bottom edge and top edge of the partition zone are provided with retaining edges. One suspended plate is arranged in each partition zone. The periphery of the suspended plate is slidably connected to the side wall of the partition zone. The periphery of the suspended plate and the retaining edge form a holding limiting structure. A funnel-shaped guide hopper is arranged in a pneumatic zone. A plurality of air outlet nozzles are arranged below the hopper. The side wall of the suspension area is connected to a material conveying pipe. The material conveying pipe is connected to a drying chamber in series. A feeding pump is arranged in the drying chamber. The material conveying pipe is connected to a feeding pipe of the second-class tower. The bottom of the tower body of the second-class tower is connected to a funnel-shaped collecting hopper. A small opening of the bottom of the funnel-shaped collecting hopper is connected to a discharge pipe of the second-class tower. The inner wall of the collecting hopper is uniformly provided with atomization nozzles.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a prilling tower, in particular to a multi-stage nicotinamide melt spray prilling tower and an operation method thereof. Background technique [0002] Nicotinamide is vitamin B3, its chemical name is 3-pyridinecarboxamide, its melting point is 129-131°C, it is a white crystalline powder, easily soluble in water or ethanol. Niacinamide is widely used in medicine, food, and feed industries, and is an indispensable nutrient for the growth and development of humans and animals. In addition, nicotinamide can also be used as plant growth regulator, hair growth promoter, hair dyeing promoter, polymer stabilizer, electroplating solution additive and biochemical reagent, etc. [0003] At present, the production methods of industrial nicotinamide at home and abroad mainly use 3-picoline, 2-methyl-5-ethylpyridine or quinoline as raw materials, and generate nicotinic acid or nicotinic acid ...

AI Technical Summary

Problems solved by technology

Due to the small particle size of the product, dust is flying in the packaging and use places, and the dust pollution in the workshop is serious. On the one hand, it causes product loss, and more seriously, it causes physical injury to workers.

In the process of storage, transportation and use, due to the small particle size of the product, it is easy to agglomerate, and nicotinamide itself is easy to agglomerate on the moisture-absorbing surface, and the agglomerated nicotinamide is not good in dispersibility when used as an additive or auxiliary agent. , seriously affecting the quality of downstream products

[0004] At present, the existing prilling towers have problems such as uneven particle size and difficulty in controlling the prilling process.

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