Liquid nitrogen spay frozen granulation vacuum drying device and working method

A vacuum drying device and spray freezing technology, which is applied in the direction of liquid droplet granulation, etc., can solve the problems of limited ice particle uniformity, uneven size distribution, and low-temperature spray granulation technology has not been industrialized. The effect of large sublimation surface area

Active Publication Date: 2017-01-04
NANJING UNIV OF POSTS & TELECOMM +1
View PDF8 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods have common shortcomings, that is, the uniformity of the formed ice particles is limited. Whether it is sprayed in a countercurrent or sprayed into the refrigerant, the ice particles ar

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid nitrogen spay frozen granulation vacuum drying device and working method
  • Liquid nitrogen spay frozen granulation vacuum drying device and working method
  • Liquid nitrogen spay frozen granulation vacuum drying device and working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as figure 1 with figure 2 As shown, the present invention provides a liquid nitrogen spray freeze granulation vacuum drying device, which comprises a bottom plate 1, a porous backing plate 2, a condensation pipe 3, a material 4, a rotating shaft 5, a screen 6, a liquid nitrogen nozzle 7, a drying Barrel 8, sealing gasket 9, upper cover 10, spray head 11, liquid nitrogen tube 12, infusion tube 13, handwheel 14, pressure reducing valve 15, first one-way valve 16, second one-way valve 17, high pressure Nitrogen gas bottle 18, liquid storage bottle 19, third one-way valve 20, liquid nitrogen tank 21, second handle 22, first handle 23, vacuum nozzle 24, exhaust baffle 25, sealing ring 26, handle 27, lock Ring 28, bracket 29, drain port 30, liquid nitrogen nozzle seat 31, liquid nitrogen nozzle nozzle 32, positioning bolt 33 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Wall thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a liquid nitrogen spray frozen granulation vacuum drying device and a working method. The device solves the problem that in the biotechnology field, when liquid materials are frozen and dried directly, due to the fact that the water sublimation surface is small and air current channels among particles are not smooth, the speed is low, and the efficiency is low. The device sprays the liquid materials into continuously sprayed ultralow-temperature liquid nitrogen mist through nitrogen pressure, material liquid drops are rapidly frozen to be amorphous spherical particles, the amorphous particles are in a non-balanced high-energy state, and drying is easy. Particle materials made through co-spray are stacked on screens which can be folded in a spray chamber and have a heating function, and the larger sublimation surface of the particle materials and through moisture migration and overflowing channels formed by particle voids and the porous screens are beneficial for rapid drying of the materials. In addition, when co-spray granulation is conducted, low-temperature nitrogen flow flows through made material particles and condenser pipes from top to bottom, and the material particles can keep low temperature and fully utilize residual cool.

Description

technical field [0001] The invention relates to a spray vacuum freeze-drying device. After the solution is sprayed and liquid nitrogen quick-frozen and granulated, dry powder is obtained by vacuum freeze-drying, which belongs to the field of bioengineering. [0002] technical background [0003] Particle size reflects the size of solid particles, and there is an inverse correlation between particle size and specific surface area, and the finer the particle size, the larger the specific surface area. In a chemical reaction, the particle size affects the reactivity and speed of the reactant through the specific surface area, so the solid reactant usually needs to reduce the particle size before the chemical reaction. Reducing the particle size is also used in other aspects, such as vacuum freeze-drying. Ice particles with a certain particle size can balance heat transfer, air permeability and sublimation area during the vacuum freeze-drying process, thereby increasing the dryin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J2/06
Inventor 仓怀兴窦军唐勇吴洲
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap