Absorbent pelletizing method

An adsorbent and ball forming technology, which is applied in the direction of granulating raw materials, chemical instruments and methods, alkali metal compounds, etc., can solve problems such as increased labor intensity, uneven dispersion, and large dust, so as to improve production efficiency, Effect of improving working environment and reducing labor intensity

Active Publication Date: 2013-05-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the airflow generated when the equipment is rotating, the dust is large when adding dry powder, and the working environment is poor, resulting in serious material loss and reduced product yield; in addition, it is difficult to control the spraying of powder during the rotational molding process, so be very careful, otherwise it is easy to produce Wall sticking, agglomeration and other phenomena will increase labor intensity and affect production efficiency
The inventor of the present invention proposes to pre-wet the powder to a cer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] NaY molecular sieve (oven-dried, water content is 27% by weight) and kaolin (Shanxi Linfen Kaolin Factory, water content is 21% by weight) are mixed according to the dry basis mass ratio of 88:12, put into the kneader, and use pressure during stirring A type atomizing spray gun was pre-wetted for 10 minutes, and the powder was pre-wetted from 26.28% by weight of water to 41% by weight, and the obtained powder was mixed evenly. Put the pre-wet powder with a water content of 41% by weight into the disc granulator and roll the balls (add a small amount of water as appropriate in the middle depending on the volatilization of water), and grow into small balls with a particle size not greater than 1mm. The crushing rate of the adsorbent is 25.2%, which meets the technical requirements of the adsorbent crushing rate ≤ 30%.

[0034] During the ball forming process, since the water content of the pre-wet powder is 41% by weight, there is almost no dust when put into the disc gra...

Embodiment 2

[0036] The pelletization was carried out according to the method of Example 1, except that the water content of the pre-wet powder was 35% by weight. Beads with a particle size of not more than 1mm were obtained, and the crushing rate of the pellets under 250N was 28.0%. And because the amount of water to be added in the ball rolling process is more, the long ball time is prolonged and the labor intensity is increased.

Embodiment 3

[0038] The pelletization was carried out according to the method of Example 1, except that the water content of the pre-wet powder was 43% by weight. Beads with a particle diameter not greater than 1mm were obtained, and the crushing rate of the bead was 26.5% under 250N.

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PUM

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Abstract

The invention provides an absorbent pelletizing method comprising the step that: a powder material used in absorbent shaping is pelletized in a rotation pelletizing device. The method is characterized in that the water content in the powder material used in absorbent shaping is 30-45wt%. With the method provided by the invention, during the pelletizing proved, dust amount is low, powder material loss is low, and working environment is greatly improved. The method provided by the invention is easy to operate, such that labor intensity is greatly reduced, and production efficiency is improved.

Description

technical field [0001] The invention provides a method for pelletizing an adsorbent. Background technique [0002] Molding is one of the main processes for preparing adsorbents in industry. Through molding, particles with suitable shape, size and strength can be provided. Among them, spherical particles have been widely used due to their uniform packing, good stackability and small mutual wear. [0003] Rotating into balls is a commonly used method of forming balls. It is mainly to put the powder into the rotating container, add water and powder during the rotating process, so that the materials are reunited, compacted and rounded during repeated rolling, and gradually grow up. Sieve to obtain pellets of desired size. [0004] CN1184702A discloses a molding method of a spherical adsorbent, which is molded according to the following steps: X-type or Y-type molecular sieve crystal powder, kaolin or / and bentonite or / and aluminum oxide, sodium cellulose and pore-enhancing age...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J2/00
Inventor 马坚陆桂东王保和纪子刚成伟丁云龙陈世华
Owner CHINA PETROLEUM & CHEM CORP
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