A combination drying equipment of gas impingement hot air and vacuum pulsation vacuum
A combined drying and vacuum pulsation technology, applied in the combination of methods to dry solid materials, lighting and heating equipment, drying solid materials, etc. problems, to achieve the effect of shortening drying time, reducing drying energy consumption, and broadening the path of material moisture transfer
Active Publication Date: 2018-12-28
NANJING TENGFEI DRYING EQUIP
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Problems solved by technology
[0005] The purpose of the present invention is to provide a new airflow impact and vacuum pulsation combined drying method and equipment to solve the problems of unscientific hot air circulation mode in the hot air drying stage, unreasonable waste gas discharge, and hot air convective heat transfer existing in the existing hot air vacuum combined drying technology. The effect is poor, and the pressure operation mode in the vacuum drying stage easily affects the drying efficiency, etc.
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[0041] The invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0042] A combined drying method of airflow impact and vacuum pulsation, the technical proposal includes:
[0043] (1) The hot air drying stage of hot air vacuum combined drying adopts gas jet impingement technology, which is characterized in that the air flow velocity at the air jet port is 0-20m / s, and the use of a centrifugal fan with a large air volume and a jet hot air with a higher wind speed can significantly Improve convective heat transfer coefficient and heat transfer efficiency;
[0044] (2) The hot air drying stage of hot air vacuum combined drying adopts humidity control dehumidification technology, which is characterized in that intermittent automatic dehumidification during the drying process is performed based on the s...
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The invention belongs to the technical field of agricultural product processing, and particularly to a gas percussion hot wind and vacuum pulsating vacuum combination drying method and device. The gas percussion hot wind and vacuum pulsating vacuum combination drying method and the device comprises a dry engine body, a pulsating vacuum generator system, a pneumatic percussion drying system, a vacuum heating system and automatic control system and other parts. A hot wind drying stage of the gas percussion hot wind and vacuum pulsating vacuum combination drying method is adopted with an air-impingement technology and a humidity control dehumidification technology, and a vacuum drying stage is adopted with a vacuum pulsating drying technology. The gas percussion hot wind and vacuum pulsating vacuum combination drying method solves the problems that the hot wind drying stage of hot wind circulation in the existing hot wind vacuum combination drying technology is not scientific, exhaust emission is not reasonable, heat convection heat transfer effect is poor and pressure operation mode of vacuum drying stage is easy to influence the drying efficiency and so on, and improves the processing efficiency of hot air vacuum combination drying technology and reduces the energy consumption.
Description
technical field [0001] The invention belongs to the technical field of agricultural product processing, and in particular relates to a combined drying method and equipment of gas impact and vacuum pulsation. Background technique [0002] Drying is an important part of agricultural product processing. Hot air vacuum combined drying technology refers to a new type of drying technology that uses hot air drying and vacuum drying in different drying stages in the integrated combined drying equipment. It has good product quality (close to vacuum drying), low drying energy consumption, and automatic drying. high degree of advantages. [0003] At present, there are still many defects in the hot air vacuum combined drying technology, which restricts the popularization and application of the technology. (1) The hot air drying stage of combined drying exists: a. The hot air circulation mode is unreasonable. When the air circulation mode of "bottom in and top out" is adopted, the dryi...
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IPC IPC(8): F26B7/00F26B9/06F26B25/22
CPCF26B7/00F26B9/06F26B25/22
Inventor 王栋荆雪松董继先肖红伟高振江曹博涛袁越锦徐英英
Owner NANJING TENGFEI DRYING EQUIP