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Micro-negative-pressure low-temperature drying device and drying process thereof

A drying device and micro-negative pressure technology, which is applied in the direction of drying gas arrangement, heating device, and drying solid materials, can solve the problems of material damage, high energy consumption, and low drying efficiency, so as to reduce operating energy consumption and improve operating efficiency. Energy efficiency, effect of reducing heating energy consumption

Pending Publication Date: 2017-10-24
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high energy consumption, damage to materials and low drying efficiency during the drying process when conventional hot air dries heat-sensitive materials with high added value, the invention provides a micro-negative pressure low-temperature drying device and its drying process

Method used

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  • Micro-negative-pressure low-temperature drying device and drying process thereof

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a micro-negative pressure low-temperature drying device, which includes a drying chamber 4, the inside of the drying chamber 4 is provided with a drying plate 10, the bottom of the drying chamber 4 communicates with the internal condenser 2 of the heat pump unit, and the heat pump unit The internal condenser 2 is simultaneously connected with the internal compressor 1 of the heat pump unit, the internal evaporator 8 of the heat pump unit, and the gas plate heat exchanger 6; the top of the drying chamber 4 is connected with the gas plate heat exchanger 6 through a circulating fan 5; A dehumidifier 7 is also installed between the internal evaporator 8 of the heat pump unit and the gas plate heat exchanger 6; an air duct regulating valve 3 and a pressure vacuum gauge are installed on the pipeline between the internal condenser 2 of the heat pump unit and the drying chamber 4 11. A throttling expansion valve 9 inside the heat pump unit is installe...

Embodiment 2

[0042] The drying process of any micro-negative pressure low-temperature drying device includes the following steps:

[0043] Step1: The low-temperature and low-humidity circulating airflow enters the drying chamber 4 to quickly absorb moisture and dry the materials to be dried evenly arranged on the drying trays 10 of each layer;

[0044] Step2: The circulating air flow absorbs moisture and dries the material and becomes a hot and humid circulating air flow, and leaves the drying chamber under the suction of the circulating fan 5, and enters the gas plate heat exchanger 6 and the circulating air flow after the secondary dehumidification in the second stage Perform heat exchange to achieve pre-cooling of the hot and humid circulating air leaving the drying chamber;

[0045]Step3: The circulating air flow after precooling leaves the gas plate heat exchanger 6 and enters the internal evaporator 8 of the heat pump unit. The heat released in the evaporator greatly reduces the temp...

Embodiment 3

[0049] Furthermore, the micro-negative pressure low-temperature drying device and its drying process are used to efficiently dry high-value-added materials that are extremely sensitive to drying temperature and cannot destroy their active ingredients.

[0050] The preferred scheme adopts a micro-negative pressure low-temperature drying device and its drying process for efficient drying of Chinese herbal medicines, health care products, seeds, high-grade agricultural products and seafood products.

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Abstract

The invention relates to a micro-negative-pressure low-temperature drying device and a drying process of the micro-negative-pressure low-temperature drying device. The device is characterized in that a micro-negative-pressure environment is introduced into a drying chamber, materials can be quickly dried at a relatively-low temperature, and a circulating airflow drying method is applied to the drying process; and the circulating airflow is cooled and dehumidified firstly by the adoption of an evaporator of a heat pump unit, then the low-temperature saturated airflow is further dehumidified by an independent dehumidifier, then the temperature of the airflow is increased by a condenser of the heat pump unit, and the airflow is introduced into the negative-pressure drying chamber. According to the process, multiple kinds of regenerative efficient clean energy, such as solar energy, geothermal energy and industrial waste heat, can be applied to the dehumidifier, condensation heat and vaporization heat of a heat pump are reasonably used at the same time, the whole drying energy consumption is far lower than that of a common drying device, the drying rate and the drying effect of the micro-negative-pressure low-temperature drying device are excellent, and the micro-negative-pressure low-temperature drying device and the drying process are especially suitable for materials extremely sensitive to drying temperature and provided with active ingredients which cannot be damaged, such as Chinese herbal medicine, health products, seeds, high-grade agricultural products and seafood products.

Description

technical field [0001] The invention relates to a micro-negative pressure low-temperature drying device and its drying process. The device introduces a micro-negative pressure environment into the drying chamber, and can quickly and efficiently dry materials at a relatively low temperature (30-50°C), especially suitable for Chinese herbal medicine, For materials such as health care products and high-grade agricultural products that are extremely sensitive to drying temperature and cannot destroy their active ingredients, this technical method belongs to the field of post-processing of raw materials and energy conservation and environmental protection. Background technique [0002] Drying technology is widely used in chemical, pharmaceutical, food, biology, materials, agricultural and sideline product processing, coal and wood processing and other industries. The most commonly used drying method is hot air convection drying. Generally, under normal pressure, hot air with a hi...

Claims

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Application Information

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IPC IPC(8): F26B9/06F25B30/02F26B23/10F26B25/00F26B21/00F26B5/04F24F3/14
CPCF24F3/14F25B30/02F26B5/04F26B21/002F26B23/10F26B25/00F24F2003/144Y02P70/10
Inventor 胡涛肖仁政高政军苏华山
Owner CHINA THREE GORGES UNIV
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