Granulation method of large particle urea

A large-grain urea and granulation technology, which is applied to urea compound fertilizers, nitrogen fertilizers, fertilizer mixtures, etc., can solve the problems of complex process flow, poor product color, and high operating costs, and achieve good color, good cooling effect, and low operating costs. low effect
CN1556074AActive Publication Date: 2004-12-22SICHUAN MEIFENG CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN MEIFENG CHEM IND
Publication Date
2004-12-22

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Abstract

A granulating process for preparing big urea particles includes such steps as using improved sprayer to spray uniform and big urea particles, cooling and solidifying in cooling tower, and fluidized cooling and dusting.
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Description

technical field

[0001] The present invention relates to a process for the production of urea, especially a process for granulation of urea. It is suitable for the granulation process of the granulation system of various urea production process devices that adopt tower granulation to produce large granule urea with uniform particle size and improve the external quality of the product. Background technique

[0002] At present, there are more than one hundred enterprises using various urea production process devices for tower granulation. The design of the granulation section is relatively simple (the process flow is shown in Figure 1), and there are three problems. One is that the structure of the granulation nozzle of the granulator is unreasonable, the sprayed urea particles have different particle sizes, and the cooling rate is different in the subsequent cooling treatment. The cooling rate of the large particle size is low. Low, easy to pulverize; the average particle siz...

Claims

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