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Drum-type vacuum pulsing temperature-variable drying method and apparatus

A vacuum pulsating, drum drying technology, used in lighting and heating equipment, non-progressive dryers, drying solid materials, etc., to achieve good results, shorten drying time, and inhibit biological and chemical changes.

Inactive Publication Date: 2008-09-10
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a drum type vacuum pulsation variable temperature drying method and equipment to solve the problems existing in the existing drying technology and equipment

Method used

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  • Drum-type vacuum pulsing temperature-variable drying method and apparatus
  • Drum-type vacuum pulsing temperature-variable drying method and apparatus
  • Drum-type vacuum pulsing temperature-variable drying method and apparatus

Examples

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Embodiment 1

[0023] Embodiment 1: Dried carrot diced with drum type vacuum pulse variable temperature drying equipment. In this embodiment, the airtight circular drum drying chamber is divided into 3 small drying chambers, such as image 3 shown.

[0024] The method of drying diced carrots with drum-type vacuum pulsation variable temperature drying equipment is as follows: ① cut a certain amount (40% of the volume of the drying chamber) into cube-shaped diced carrots (moisture content is about 90% wb) through the feed ②Set the temperature of the heating medium to 65°C, the temperature difference between the inlet and outlet of the circulating medium is 5°C, turn on the pressure pump 9, and the heating medium begins to circulate; ③Set the pulsation period of the pulsating pressure working system, that is, vacuum 0.095MPa, keep the vacuum degree for 15 minutes; change the vacuum degree to 0, keep it for 1 minute (the maintenance of the vacuum degree is controlled by the electromagnetic flow...

Embodiment 2

[0025] Embodiment 2: processing raisins with drum-type vacuum pulsation variable temperature drying equipment. In this embodiment, the airtight circular drum drying chamber is divided into 2 small drying chambers, such as figure 2 shown.

[0026]The method of processing raisins with the drum-type vacuum pulsation variable temperature drying equipment is as follows: 1. A certain amount (40% of the volume of the drying chamber) of grapes with ears (moisture content is about 83%wb) will be passed through the feed ②Set the initial temperature of the heating medium to 40°C, the temperature difference between the inlet and outlet of the circulating medium is 5°C, turn on the pressure pump 9, and the heating medium starts to circulate; ③Set the pulsation period of the pulsating pressure working system, that is Vacuum degree 0.075MPa, keep this vacuum degree for 10 minutes; change vacuum degree to 0, keep for 10 minutes (the maintenance of vacuum degree is controlled by the electrom...

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Abstract

The invention discloses a drum-type vacuum pulsing transformation temperature drying method and a device, comprising a sealed circular roller, a heating circulating system, a pulsing vacuum system connected with the roller and a control system, wherein, the vacuum degree of the pulsing vacuum system connected with the roller varies with the material arranging from 0.097 MPa to 0 MPa, the heating temperature of the heating circulating system varies with the state of the material. The device has good heat transmitting performance, preserves the nutrient content and the active material of the material as well as the color and luster of the material well, greatly raises the drying speed, shortens the drying time, reduces the drying energy consumption and lowers the drying cost. The drum-type vacuum pulsing transformation temperature drying method and the device are suitable for drying the foods, the biological products, the drugs and the chemical products with good fluidness, particularly for drying the products thermally sensitive; especially, the effect for drying the foods and the biotechnology products with high added value is better.

Description

technical field [0001] The invention relates to a drum-type vacuum pulsation variable temperature drying method and equipment, which is mainly used for drying food, biological products, medicines and chemical products with good fluidity, especially for drying heat-sensitive substances, especially for high value-added products. The drying effect of food and biological medicine is better. Background technique [0002] The reason why the material can be dried is that the partial pressure of water vapor on the surface of the material is greater than the partial pressure of water vapor in the drying environment, that is, there is a pressure gradient between the two, and the drying speed is proportional to the size of the pressure gradient (Edited by Yao Yuying. Principles of Chemical Engineering (Volume 2). Tianjin Science and Technology Press, January 2001 edition, 258-271). When the water vapor in the drying medium is saturated, there will be no pressure gradient, and the dryi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B11/02F26B7/00F26B5/04F26B3/24
Inventor 高振江肖红伟曹志向吴定伟田松涛
Owner CHINA AGRI UNIV
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