Slurry spray-drying method

A drying and slurry technology, applied in the direction of spray evaporation, injection device, liquid injection device, etc., can solve the problems of microsphere bursting, generation of special-shaped and fine powder, etc., to reduce the probability of particle rupture, reduce the formation of special-shaped particles, Avoid the effect of too rapid evaporation

Inactive Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art, to provide a method of spray-drying slurry that can solve the problems of microsphere bursting, abnormal shape and fine powder in the drying process, and can improve the sphericity of the obtained dry particles. method
[0008] When adopting the above-mentioned method of the present invention to carry out spray drying, can solve adopting the method in the prior art to produce the microsphere bursting that produces in the drying process, produce special-shaped and fine powder problem, and can improve the sphericity of the dried particle that obtains

Method used

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Examples

Experimental program
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specific Embodiment approach

[0050] The nozzle specifically includes:

[0051] Nozzle body, the nozzle body is provided with a nozzle head 1 for spraying material into droplets, a material inlet 4 communicated with the nozzle head 1, and a material cavity 8 connecting the nozzle head 1 and the material inlet 4; and protection Wind guide pipe 2, the protection wind guide pipe 2 is provided with a protection wind distribution port 5 and a protection wind injection port 6 communicated with the protection wind distribution port 5; the protection wind guide pipe 2 is arranged around the nozzle body, so that The protection wind ejected from the protection air injection port 6 surrounds the mist-shaped material ejected from the material injection port 3 of the nozzle head 1 .

[0052] In the present invention, in the pressure nozzle, in order to facilitate the installation and make full use of the structure of the existing nozzle as much as possible, so as to reduce the modification and save the cost, the presen...

Embodiment 1

[0103] This example is used to illustrate a method for spray-drying slurry provided by the present invention. The spray dryer of the present embodiment contains such as figure 2 nozzle shown.

[0104]The catalyst slurry (the total content of kaolin and pseudo-boehmite is 30% by weight) is introduced into the nozzle from the material inlet by a high-pressure pump. The tower body of the spray dryer is sprayed to form a mist cone, wherein the cone angle of the mist cone is 110 degrees, and the tower body is filled with high-temperature hot air from the drying air distributor. At the same time, the protection wind is introduced from the protection wind inlet (1), and the protection wind is sprayed into the tower body through the protection wind casing, the protection wind distribution port (4), the protection wind guide pipe and the protection wind injection port to surround the tower body. The fog cone is such that the outer surface of the fog cone is relatively isolated from ...

Embodiment 2

[0107] This example is used to illustrate a method for spray-drying slurry provided by the present invention. The spray dryer of the present embodiment contains such as figure 1 nozzle shown.

[0108] The catalyst slurry (the total content of kaolin and pseudo-boehmite is 30% by weight) is introduced into the nozzle from the material inlet by a high-pressure pump. The tower body of the spray dryer is sprayed to form a mist cone, wherein the cone angle of the mist cone is 120 degrees, and the tower body is filled with high-temperature hot air from the drying air distributor. At the same time, the protection wind is introduced from the protection wind distribution port (1), and the protection wind is sprayed into the tower body through the protection wind guide pipe and the protection wind injection port to surround the fog cone, so that the outer surface of the fog cone It is relatively isolated from the high-temperature hot air in the tower, wherein the flow rate of the prot...

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Abstract

The invention relates to the field of spray drying and discloses a slurry spray-drying method. The method is used in a spray-drying machine comprising a spray-drying tower body and a nozzle. The method comprises introducing slurry to be dried into the nozzle, injecting the slurry into tower body containing high temperature hot air through the nozzle, carrying out atomization to obtain a mist cone, and introducing protective wind to positions around the mist cone so that the outer peripheral surface of the mist cone is relatively isolated from the high temperature hot air in the tower body, wherein the temperature of the protective wind is lower than the temperature of the high temperature hot air. When the method is used for spray drying, the method can solve the problems of microsphere burst, special-shaped fine powder production and small powder particle sizes in a drying process and can realize good sphericity of the dried granules.

Description

technical field [0001] The invention relates to the field of spray drying, in particular to a method for spray drying slurry. Background technique [0002] Spray dryer is a device that can complete drying and granulation at the same time. According to the process requirements, the pressure, flow rate and the size of the spray hole of the material liquid pump can be adjusted to obtain the required spherical particles in a certain size ratio. At present, spray dryers are widely used in chemical, pharmaceutical, food, water treatment and other fields. [0003] The spray dryer usually includes a spray drying tower, a hot air supply device (the hot air supply device includes a hot air distributor arranged on the top of the spray drying tower), an exhaust device and a liquid material atomizing device (arranged in the spray drying tower). The characteristic of the process is that the gas phase medium is filtered and heated, distributed through the hot air distributor, and then en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/16B01D1/20B05B7/06
Inventor 吕庐峰张翊王子军张久顺秦娅李学锋何金龙田志鸿刘亚林张同旺
Owner CHINA PETROLEUM & CHEM CORP
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