316 titanium fluidized bed drying-cooling process applied to potassium salt

A fluidized bed drying and fluidized bed cooling technology is applied in the directions of drying solid materials, drying gas arrangement, heating to dry solid materials, etc., and can solve the problems of agglomeration of potassium salt products, long drying time and high energy consumption, etc. Achieve the effect of reducing agglomeration, small product particle size and uniform heating

Active Publication Date: 2017-12-15
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, during the drying and cooling process of potassium salt, there are problems such as severe agglomeration of the finished potassium salt product, scarring of the fluidized bed, long drying time, and high energy consumption.

Method used

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  • 316 titanium fluidized bed drying-cooling process applied to potassium salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) First-level drying, feed hot flue gas into the dryer until the cold air in the dryer is exhausted, send the potassium salt wet material into the dryer, and at the same time, feed the anti-caking powder with a liquid mass fraction of 1%. The agent is sprayed to the drier for 30min at a rate of 30min / L with a spray gun, and the potassium salt wet material is fully mixed with the anti-caking agent in the drying oven, and dried to form the first potassium salt dust; 2) Secondary drying, the air inlet temperature of the secondary drying is 400°C, the first potassium salt dust is evenly divided into three batches and rotated and sprayed in successively from the material inlet located on the upper part of the drying section of the 316 titanium fluidized bed, and two adjacent batches The interval time between them is 10min, and the hot flue gas is pressurized once between the two batches of spraying to keep the first potassium salt dust in boiling contact with the hot flue ga...

Embodiment 2

[0030]1) First-level drying, feed hot flue gas into the dryer until the cold air in the dryer is exhausted, send the potassium salt wet material into the dryer, and at the same time, feed the anti-caking powder with a liquid mass fraction of 1%. The agent is sprayed to the drier for 30min at a rate of 30min / L with a spray gun, and the potassium salt wet material is fully mixed with the anti-caking agent in the drying oven, and dried to form the first potassium salt dust; 2) Secondary drying, the air inlet temperature of the secondary drying is 425°C, the first potassium salt dust is evenly divided into three batches and rotated and sprayed in successively from the material inlet located on the upper part of the drying section of the 316 titanium fluidized bed, and two adjacent batches The interval time between them is 10min, and the hot flue gas is pressurized once between the two batches of spraying to keep the first potassium salt dust in boiling contact with the hot flue gas...

Embodiment 3

[0033] 1) First-level drying, feed hot flue gas into the dryer until the cold air in the dryer is exhausted, send the potassium salt wet material into the dryer, and at the same time, feed the anti-caking powder with a liquid mass fraction of 1%. The agent is sprayed to the drier for 30min at a rate of 30min / L with a spray gun, and the potassium salt wet material is fully mixed with the anti-caking agent in the drying oven, and dried to form the first potassium salt dust; 2) Secondary drying, the air inlet temperature of the secondary drying is 450°C, the first potassium salt dust is evenly divided into three batches and rotated and sprayed in successively from the material inlet located at the upper part of the drying section of the 316 titanium fluidized bed, and two adjacent batches The interval time between them is 10min, and the hot flue gas is pressurized once between the two batches of spraying to keep the first potassium salt dust in boiling contact with the hot flue ga...

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Abstract

The invention discloses a 316 titanium fluidized bed drying-cooling process applied to potassium salt. The 316 titanium fluidized bed drying-cooling process comprises the following steps: (1) primary drying: injecting hot flue gas into a drying machine till cold air in the drying machine is exhausted, feeding the wet material of potassium salt to the drying machine, spraying an anti-caking agent in liquid form to the drying machine at a spraying rate of 30 min / L by utilizing a spraying gun, waiting for the sufficient mixing of the wet material of potassium salt and the anti-caking agent in the drying machine, and drying to form first potassium salt dust; (2) secondary drying; (3) cooling: mixing second potassium salt dust with the first potassium salt dust, feeding the mixture to a fluidized bed for cooling so as to obtain a finished product of potassium salt and second off gas, and recovering the second tail gas by utilizing a bag-type dust collector, so that only the finished product of potassium salt is obtained; and (4) emptying. The 316 titanium fluidized bed drying-cooling process applied to potassium salt disclosed by the invention has the advantages that the drying time is short and the particle size of the finished product is small, and can be widely applied to the technical field of the drying of potassium salt.

Description

technical field [0001] The invention relates to the technical field of drying of potassium salts, more specifically, the invention relates to a 316 titanium fluidized bed drying and cooling process applied to potassium salts. Background technique [0002] Potash is the largest product used in agriculture, 95% of the world's potash products are used as potash fertilizers, and the other 5% are used as industrial raw materials. According to the statistics of the US Geological Survey, in 2012, the world's proven potash reserves were 8.3 billion tons (100 million K20), and the reserve base was 16.7 billion tons, which can be exploited by the world for more than 300 years. [0003] In the production process of potassium salt, drying and cooling is an essential step. In the prior art, during the drying and cooling process of the potassium salt, there are problems such as severe agglomeration of the finished potassium salt product, scabbing of the fluidized bed, long drying time, a...

Claims

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Application Information

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IPC IPC(8): F26B3/084F26B21/00
CPCF26B3/084F26B21/00
Inventor 郑德坤简春民金岩陈钢蔡鸣
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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