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Gas percussion hot wind and vacuum pulsating vacuum combination drying method and device

A combined drying and vacuum pulsation technology, which is applied in the direction of drying solid materials, lighting and heating equipment, drying solid materials, etc., can solve the problem of unscientific hot air circulation, poor convective heat transfer effect of hot air, and unreasonable exhaust gas discharge, 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: 2017-06-13
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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  • Gas percussion hot wind and vacuum pulsating vacuum combination drying method and device
  • Gas percussion hot wind and vacuum pulsating vacuum combination drying method and device

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Embodiment Construction

[0041] The invention will be further described below with reference to 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 scheme includes:

[0043] (1) The hot air drying stage of the hot air vacuum combined drying adopts the gas jet impingement technology, which is characterized in that the airflow velocity of the airflow jet port is 0~20m / s. Improve convective heat transfer coefficient and heat transfer efficiency;

[0044] (2) The hot air drying stage of the hot air vacuum combined drying adopts the humidity control and dehumidification technology, and it is characterized in that the intermittent automatic dehumidification in the drying process is carried out based on the upper and lower limits of the set humidity and the humidity of the drying chamber monitored onlin...

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Abstract

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 particularly 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 an integrated combined drying equipment. It has good product quality (close to vacuum drying), low drying energy consumption, automation. High degree of advantage. [0003] At present, there are still many defects in the combined drying technology of hot air and vacuum, which restrict the popularization and application of the technology. (1) The hot air drying stage of combined drying exists: a. The hot air circulation method is unreasonable. When the air circulation method of "bottom in and top out" is adopted, the drying ...

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Application Information

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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
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