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Nozzle for spray dryer and spray dryer with nozzle

A technology of spray dryer and spray drying tower, which is applied in the direction of liquid separation into beads and granulation, which can solve the problems of microsphere bursting, production of special-shaped and fine powder, etc., and 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 and provide a nozzle for a spray dryer that can be conveniently used in industry. Problems with bursting of microspheres, generation of off-shape and fines, and the ability to improve the sphericity of the obtained dry granules

Method used

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  • Nozzle for spray dryer and spray dryer with nozzle
  • Nozzle for spray dryer and spray dryer with nozzle
  • Nozzle for spray dryer and spray dryer with nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In this embodiment, the spray dryer provided by the present invention is used to dry the slurry used for preparing the catalyst. The spray dryer of the present embodiment contains such as figure 2 nozzle shown.

[0078] 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 mist cone is such that the outer surface of the mist cone...

Embodiment 2

[0081] In this embodiment, the spray dryer provided by the present invention is used to dry the slurry used for preparing the catalyst. The spray dryer of the present embodiment contains such as figure 1 nozzle shown.

[0082] 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...

Embodiment 3

[0085] In this embodiment, the spray dryer provided by the present invention is used to dry the slurry used for preparing the catalyst. The spray dryer of the present embodiment contains such as figure 2 nozzle shown.

[0086] 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 100 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 (2), and the protection wind is sprayed into the tower body through the protection wind sleeve, the protection wind distribution port (3), 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 i...

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Abstract

The invention relates to the field of a spray dryer and discloses a nozzle for a spray dryer and a spray dryer with the nozzle. The nozzle comprises a nozzle main body which is provided with a nozzle head for injecting a material to form droplets, a material inlet communicated with the nozzle head and a material cavity connecting the nozzle head and the material inlet, and a protective air guide pipe which is provided with a protective air distribution port and a protective air injection port communicated with the protective air distribution port and is provided around the nozzle main body so that the protective air injected by the protective air injection port surrounds the droplet-like material ejected from a material injection port of the nozzle head. The nozzle can reduce the problem that fine powder is generated by fast heating-caused bursting of the microspheres during the spray drying process, realizes concentrated particle size distribution, reduces production of special-shaped particles and improves the sphericity of the finished particles.

Description

technical field [0001] The present invention relates to a spray dryer, in particular to a nozzle for the spray dryer, and furthermore, the present invention also relates to a spray dryer. 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 he...

Claims

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Application Information

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IPC IPC(8): B01J2/04
Inventor 张翊吕庐峰王子军侯栓弟张久顺秦娅李学锋何金龙刘亚林田志鸿
Owner CHINA PETROLEUM & CHEM CORP
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