Heat pump tail heat recovery microwave oxygen insulation dryer

Abstract

The invention discloses a heat pump type tail heat recovery microwave oxygen-isolating drying machine. A glass cover is in a tunnel shape; a microwave unit is arranged on the exterior of the glass cover and is fixed on a base plate under a conveying belt; after the material on the conveying belt is heated by the microwave unit in the tunnel-shaped glass cover, the material reaches the conveying belt of an isolating box through a sliding plate; an isolating curtain and an air blower are arranged at an outlet of the tunnel-shaped glass cover; the isolating curtain and an exhaust pipe are arranged at an inlet of the tunnel-shaped glass cover; the heat in the exhaust pipe is transferred through a heat pump and then enters into a hot air drying system of the isolating box. The continuous high-efficient enzyme deactivation and synchronous oxygen-isolating drying under a non-vacuum condition are realized by the heat pump type tail heat recovery microwave oxygen-isolating drying machine and the industrial implementation is conveniently performed; the power consumption of the heat pump is low, the heating efficiency is high, the complete recovering of the tail heat is realized and the cost and the energy consumption are lowered; the rear-section hot air countercurrent is beneficial to mild drying and maintenance for the uniform quality; the heat pump type tail heat recovery microwave oxygen-isolating drying machine is fit for drying the agricultural products which are easily subjected to enzymatic and high-temperature oxidation browning and is wide in application prospect.

Description

technical field [0001] The invention relates to a heat pump type tail heat recovery microwave oxygen insulation dryer. Background technique [0002] Drying is to remove the moisture in the material, which is widely used in food, chemical industry, agricultural product processing, biological product processing and other fields, and is a unit operation with high frequency of use. [0003] Drying can be carried out in the air or in the sun under natural conditions, but for industrial production, drying is generally carried out in a dryer. For agricultural products such as lilies that are prone to enzymatic and oxidative browning, they generally need to be boiled at high temperature first. Drying is carried out after enzyme-killing treatment, and drying also has special requirements, that is, it is hoped that oxygen should be separated while heating (the speed of oxidative browning will be greatly increased during heating), and fast and efficient drying can be carried out under ...

AI Technical Summary

Problems solved by technology

[0004] In order to achieve the purpose of oxygen isolation, vacuum drying is generally used at this stage, but the cost of vacuum drying is high, the efficiency is low, and there are high requirements for equipment, so it is difficult to realize continuous industrial production; on the other hand, the existing drying equipment There are also technical application obstacles such as high energy consumption and difficult heat transfer and penetration, so the existing technology cannot meet the drying requirements of lilies, which are prone to enzymatic and oxidative browning.

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