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Water vapor vacuum rapid drying system and working method

A drying system, vacuum fast technology, applied in the direction of drying solid materials, drying gas arrangement, method combination to dry solid materials, etc., can solve the problems of limiting the use of superheated steam drying system, and achieve the effect of low energy consumption

Inactive Publication Date: 2016-07-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when superheated steam is used as the drying medium, when the drying system is still at normal pressure, the drying temperature must be above 100°C, which limits the use of superheated steam drying system

Method used

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  • Water vapor vacuum rapid drying system and working method

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Embodiment Construction

[0019] Refer below figure 1 Describe the working process of the energy-saving and high-efficiency vacuum drying system.

[0020] Firstly, the dryer 1 is evacuated to a certain degree, and then the compressor 2 and the expander 5 are turned on to make the drying system work, so that the system runs smoothly.

[0021] The superheated steam 7 passes through the dryer 1 as a drying medium. Due to the concentration difference between the drying medium and the material to be dried 9, the superheated steam takes out the moisture in the material and becomes a superheated steam with a small superheat, and then compressed by the compressor 2. , the temperature and pressure of the steam rise, and then enter from the hot side of the first heat exchanger 3, the steam releases heat in the first heat exchanger 3, and the temperature of the steam decreases; the outlet of the hot side of the first heat exchanger 3 is connected with the second The hot side inlet of the heat exchanger 4 is conn...

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Abstract

The invention discloses a water vapor vacuum rapid drying system and a working method and belongs to the field of energy sources, power and the like. The water vapor vacuum rapid drying system is characterized in that compared with an air drying medium under the same pressure condition, the system takes water vapor (7) with a relatively strong moisture adsorption capability as a drying medium; compared with a normal-pressure operation condition, the concentration difference of moisture inside and outside a material to be dried (9) is increased through vacuum operation in a dryer (1), so that the dehumidifying speed of the material to be dried (9) is easily improved; and furthermore, the system only needs to consume mechanical energy of a compressor (2) and then can be operated, and one part of energy is recycled by adopting an expansion machine (5), so that the whole energy consumption of the system is relatively low and no pollution is caused.

Description

technical field [0001] The invention relates to a water vapor vacuum rapid drying system and a working method, which belong to the field of energy and power. Background technique [0002] Conventional drying is an energy-intensive process. According to statistics, 10%-25% of the world's energy is used for industrial thermal drying, and the energy used for drying in my country accounts for about 12% of the total energy consumption of the national economy. Low drying efficiency is the main cause of energy consumption, and it is very important to improve drying efficiency. [0003] Conventional hot air drying uses hot air as the drying medium, and the hot air contacts the material to be dried to take away the moisture on the surface of the material. The moisture absorption ability of hot air is not strong, so when hot air is used as the drying medium, the flow rate of the drying medium is large, and the drying time is long, and the efficiency is low. [0004] Superheated ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B21/00F25B1/00F26B7/00
CPCF26B21/005F25B1/00F26B7/00
Inventor 韩东岳晨姚瑶何纬峰蒲文灏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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