CN204438715U - Heat-pump-type tail recuperation of heat microwave oxygen barrier drying machine - Google Patents

Abstract

The utility model discloses a heat pump type tail heat recovery microwave oxygen-insulating dryer. The glass cover is in the shape of a tunnel, and a microwave unit is arranged outside and fixed on the substrate under the conveyor belt. The materials on the conveyor belt are inside the tunnel-shaped glass cover. After being heated by the microwave unit, it reaches the conveyor belt of the isolation box through the slide plate; the exit of the tunnel-shaped glass cover is equipped with a barrier curtain and a blower, and the entrance is equipped with a barrier curtain and an exhaust pipe. The heat in the exhaust pipe is transferred by the heat pump Enter the hot air drying system of the isolation box. The utility model realizes continuous high-efficiency enzyme elimination and synchronous oxygen barrier drying under non-vacuum conditions, and is convenient for industrial implementation; the heat pump has low power consumption and high heating coefficient, realizes complete recovery of tail heat, and reduces cost and energy consumption; The back-stage hot air counterflow is conducive to gentle drying and maintaining uniform quality, especially suitable for drying agricultural products that are prone to enzymatic and high-temperature oxidative browning, and has broad application prospects.

Description

Heat pump tail heat recovery microwave oxygen insulation dryer

technical field

The utility model relates to a heat pump type tail heat recovery microwave oxygen barrier dryer.

Background technique

Drying is to remove the moisture in the material. It is widely used in food, chemical industry, agricultural product processing, biological product processing and other fields, and it is a unit operation with high frequency of use.

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 the condition of oxygen separation , so as to quickly and effectively kill enzymes and prevent oxidative browning to ensure product quality.

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 of high energy consumption and difficulty in heat transfer and penetration, so the existing technology cannot meet the drying of lilies, which are prone to enzymatic and oxidative browning.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a heat pump tail heat recovery microwave oxygen barrier dryer with low energy consumption, high speed, high efficiency and convenient industrial continuous production.

In order to overcome the deficiencies in the prior art, the utility model adopts the following technical solutions:

A heat pump tail heat recovery microwave oxygen insulation dryer, including a conveyor belt, a microwave unit and a glass cover, characterized in that: the glass cover is tunnel-shaped and fixed on the substrate under the conveyor belt, and the tunnel-shaped glass cover is equipped with a microwave Unit, the material on the conveyor belt is heated by the microwave unit in the tunnel-shaped glass cover and then arrives on the conveyor belt of the isolation box through the slide plate; the exit of the tunnel-shaped glass cover is equipped with a barrier curtain and blower, and the entrance is equipped with a barrier curtain And the exhaust pipe, the exhaust pipe is equipped with a damper and an exhaust gas return port and is connected to the exhaust fan. The exhaust fan is connected to the heat pump evaporator and transfers heat through the heat pump host to release heat on the heat pump condenser. The fresh air is heated by the heat pump condenser. The air pipe and exhaust fan enter the left end of the isolation box. The isolation box is equipped with a convection fan and a conveyor belt passes from right to left. The right end of the isolation box is equipped with an exhaust port, which is connected to the exhaust pipe through the exhaust pipe. exhaust gas return port.

The conveyor belt of the tunnel-shaped glass cover is driven by the driving wheel to drive the tail wheel to work, and the driving wheel is driven by the motor and the reducer to drive the chain drive to work, and the left end of the conveyor belt is provided with a feeding hopper.

The conveyor belt of the isolation box is driven by the driving wheel to drive the tail wheel to work, and the left end of the conveyor belt is provided with a finished product groove.

The convection fan consists of a motor and fan blades.

The utility model is essentially composed of three parts: a microwave oxygen barrier drying system, a tail heat recovery system and a hot air drying system, which will be described separately below.

(1) Microwave Oxygen Barrier, Rapid Enzyme Destruction Drying System:

The material conveying system consists of a motor, a reducer, a chain drive, a conveyor belt driving wheel, a tail wheel, and a conveyor belt. The microwave units arranged reasonably and the tunnel-shaped glass cover form an oxygen-isolated microwave heating system; the glass cover can pass through Microwave heats the material, the tunnel-shaped glass cover is buckled on the substrate, the conveyor belt transports the material, and the tunnel-shaped glass cover, barrier curtain and peripheral equipment are used for oxygen isolation.

When the system is working, due to the function of the exhaust fan, the water vapor generated by the microwave heating of the material forms a directional movement from right to left in the tunnel-shaped glass cover, which is the key element for oxygen isolation and air removal. The material goes through the barrier curtain from left to right with the conveyor belt and enters the tunnel-shaped glass cover. At the beginning, the water vapor moving from right to left can remove oxygen and be quickly sterilized by microwave heat. The material goes from left to right. Consisting of a reverse movement with the directional water vapor airflow from right to left, the material can be gradually dried under the action of microwaves in an oxygen barrier. When the material is dried and passes through the barrier curtain from the right end of the tunnel-shaped glass cover, it is quickly forced to cool by the blower. Avoid re-oxidation and high-temperature browning that may occur when the material temperature is high.

The barrier curtain plays the role of isolating from the outside air.

(2) Tail heat recovery system:

The gas overflowing from the left end of the tunnel-shaped glass cover is mainly water vapor with a large heat enthalpy, which is fully recovered by the heat pump and used as the heat source for later hot air drying and heating; adjust the damper, and the gas with heat enters the heat pump evaporator through the exhaust pipe and fan , the heat is transferred through the heat pump host, and the heat is condensed and released in the heat pump condenser. After the fresh air is heated in the heat pump condenser, it is introduced into the exhaust fan by the pipeline for the next step of hot air drying.

(3) Hot air drying system:

After the material comes out of the glass cover, it is quickly and forcibly cooled by the blower. After the temperature drops, it will not be oxidized and browned at high temperature, and it will enter the next stage of hot air drying through the material slide plate.

The material transportation of the hot air drying system is realized by the tail wheel, the conveyor belt and the driving wheel. The internal circulation fan composed of the motor and the fan blade is arranged in the isolation box to realize the strong convection penetrating the material and hot air drying. The hot air enters through the box and flows countercurrently with the material, which plays a role of gentle homogenization and drying. Finally, the exhaust gas with high humidity is returned to the exhaust gas return port on the exhaust pipe through the exhaust port through the exhaust port, and the heat is fully recovered by the heat pump evaporator. , the finished material falls into the temporary storage finished product tank for use.

Compared with the prior art, the beneficial effect of the utility model also lies in:

Microwave heating is fast, efficient, and has strong penetrating ability. The clever use of water vapor deoxygenation moving from right to left has realized continuous and efficient enzyme deactivation and oxygen barrier drying under non-vacuum conditions. Oxygen drying is completed synchronously, which is convenient for low-cost implementation of industrialization; the heat pump has low power consumption, high heating coefficient and complete recovery of tail heat, which reduces cost and energy consumption, and realizes energy saving and emission reduction; the reverse flow of hot air in the latter stage is conducive to material homogenization Mild drying, easy to maintain uniform quality of materials; the utility model is especially suitable for drying of agricultural products such as lilies that are prone to enzymatic and high-temperature oxidative browning, and is conducive to improving the drying quality of such products, with broad application prospects.

Description of drawings

Fig. 1 is a schematic diagram of the plane structure of the utility model.

Fig. 2 is a schematic diagram of the cross-sectional structure inside the tunnel-shaped glass cover.

Each label in the figure means:

1. Motor and reducer; 2. Chain drive; 3. Feeding hopper; 4. Barrier curtain; 5. Exhaust pipe; 6. Exhaust pipe; 7. Microwave unit; 8. Drive wheel; 9. Exhaust port; 10 1. Finished product tank; 11. Damper; 12. Exhaust fan; 13. Heat pump condenser; 14. Heat pump evaporator; 15. Exhaust gas return port; 16. Heat pump host; 17. Hot air pipe; Glass cover; 20, conveyor belt; 21, tail wheel; 22, fan motor; 23, exhaust fan; 24, tail wheel; 25, fan blade; 26, conveyor belt; 27, driving wheel; 28, isolation box; 30 , Substrate; 32, material; 33 material sliding plate.

Detailed ways

Now in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 and 2, the heat pump tail heat recovery microwave oxygen-proof dryer includes a conveyor belt 20, a microwave unit 7 and a glass cover 19, the glass cover 19 is tunnel-shaped and fixed on the substrate 30 below the conveyor belt 20, A microwave unit 7 is arranged outside the tunnel-shaped glass cover 19, and the material 32 on the conveyor belt 20 is heated by the microwave unit 7 in the tunnel-shaped glass cover 19 and then arrives on the conveyor belt 26 of the isolation box 28 through the slide plate 33; The outlet of the cover 19 is provided with a barrier curtain 4 and a blower 18, and the inlet is provided with a barrier curtain 4 and an exhaust pipe 5. The exhaust pipe 5 is provided with a damper 11 and an exhaust gas return port 15 and is connected to an exhaust fan 12, which is connected to a heat pump. The evaporator 14 transfers heat through the heat pump host 16 and releases heat on the heat pump condenser 13. After the fresh air is heated in the heat pump condenser 13, it enters the left end of the isolation box 28 through the hot air pipe 17 and the exhaust fan 23, and the isolation box 28 A convection fan is provided inside and a conveyor belt 26 passes from right to left. The right end of the isolation box 28 is provided with an exhaust port 9, and the exhaust port 9 is connected to the exhaust return port 15 on the exhaust pipe 5 through the exhaust pipe 6.

The conveyor belt 20 of the tunnel-shaped glass cover 19 is driven by the driving wheel 8 to drive the tail wheel 21 to work, and the driving wheel 8 is driven by the motor and the reducer 1 to drive the chain drive 2 to work. The left end of the conveyor belt 20 is provided with a feed hopper 3 .

The conveyor belt 26 of the isolation box 28 is driven by the driving wheel 27 to work the tail wheel 24, and the left end of the conveyor belt 26 is provided with a finished product tank 10.

Described convection fan is made up of motor 22 and fan blade 25.

This embodiment is essentially composed of three parts: a microwave oxygen barrier drying system, an exhaust heat recovery system and a hot air drying system, which will be described separately below.

(1) Microwave Oxygen Barrier, Rapid Enzyme Destruction Drying System:

The material conveying system consists of a motor, a reducer 1, a chain drive 2, a conveyor belt driving wheel 8, a tail wheel 21, and a conveyor belt 20. The microwave unit 7 arranged reasonably and the tunnel-shaped glass cover 19 constitute an oxygen-insulated microwave heating system. The glass cover 19 can fully pass through the microwave to heat the material 32, the tunnel-shaped glass cover 19 is buckled on the substrate 30, the conveyor belt 20 transports the material, and the tunnel-shaped glass cover 19, the barrier curtain 4 and peripheral equipment are oxygen-isolated.

When the system is working, due to the effect of the exhaust fan 12, the water vapor generated by the microwave heating of the material forms a directional movement from right to left in the tunnel-shaped glass cover 19, which is the key element for oxygen isolation and air removal. The material passes through the barrier curtain 4 from left to right along with the conveyor belt 20 and enters the tunnel-shaped glass cover 19. At the beginning, the water vapor moving from right to left can remove oxygen and be rapidly extinguished by microwave heat. The material 32 The water vapor flow from left to right and from right to left constitutes a reverse movement, and the material 32 can be gradually dried under the action of microwaves in an oxygen barrier. The blower 18 blows air for rapid forced cooling to avoid re-oxidation and high-temperature browning that may occur when the material temperature is high.

The barrier curtain 4 plays the role of isolating from the outside air.

(2) Tail heat recovery system:

The gas overflowing from the left end of the tunnel-shaped glass cover 19 is mainly water vapor and has a large heat enthalpy, which is fully recovered by a heat pump and used as a heat source for later hot air drying and heating; the damper 11 is adjusted, and the gas with heat passes through the exhaust pipe 5 and the fan 12 Enter the heat pump evaporator 14, transfer heat through the heat pump host 16, and realize condensation and heat release in the heat pump condenser 13. After the fresh air is heated in the heat pump condenser 13, it is introduced into the exhaust fan 23 by the pipeline 17 for the next step of hot air drying.

(3) Hot air drying system:

After the material comes out of the glass cover 19, it is quickly and forcibly cooled by the blower. After the temperature drops, it will no longer be oxidized and high-temperature browned, and it will enter the next stage of hot air drying through the material slide plate 33.

The material transportation of the hot air drying system is realized by the tail wheel 24, the conveyor belt 26 and the driving wheel 27. The internal circulation fan composed of the motor 22 and the fan blade 25 is arranged in the isolation box 28 to realize strong convection penetrating the material and drying the hot air. The source of the hot air is Exhaust heat recovery, exhaust fan 23 sends hot air through box 28 to flow countercurrently with the material, which plays a role of gentle homogenization and drying, and finally returns high-humidity exhaust gas through exhaust pipe 6 to the exhaust on exhaust pipe 5 through exhaust port 9 The air return port 15 is fully recovered by the heat pump evaporator 14, and the finished materials fall into the finished product tank temporarily for use.

The above are only preferred embodiments of the utility model, and do not limit the utility model in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the utility model, or modify it into an equivalent change, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (4)

1. A heat pump type tail heat recovery microwave oxygen barrier dryer, comprising a conveyor belt, a microwave unit and a glass cover, characterized in that: the glass cover is tunnel-shaped and fixed on the substrate below the conveyor belt, and the tunnel-shaped glass cover is peripheral There is a microwave unit, and the materials on the conveyor belt are heated by the microwave unit in the tunnel-shaped glass cover and then arrive on the conveyor belt of the isolation box through the slide plate; the exit of the tunnel-shaped glass cover is equipped with a barrier curtain and blower, and the entrance is equipped with a barrier Curtain and exhaust pipe, the exhaust pipe is equipped with a damper and exhaust gas return port and connected to the exhaust fan, the exhaust fan is connected to the heat pump evaporator and transfers heat through the heat pump host to release heat on the heat pump condenser. After the fresh air is heated in the heat pump condenser It enters the left end of the isolation box through the hot air pipe and exhaust fan. The isolation box is equipped with a convection fan and a conveyor belt passes from right to left. Exhaust gas return port on the trachea. 2. The heat pump tail heat recovery microwave oxygen insulation dryer according to claim 1, characterized in that: the conveyor belt of the tunnel-shaped glass cover is driven by the driving wheel to drive the tail wheel to work, and the driving wheel is driven by the motor and the reducer The chain drive works, and the left end of the conveyor belt is equipped with a feeding hopper. 3. The heat pump tail heat recovery microwave oxygen insulation dryer according to claim 1 or 2, characterized in that: the conveyor belt of the isolation box is driven by the driving wheel to drive the tail wheel to work, and the left end of the conveyor belt is provided with a finished product groove. 4. The heat pump exhaust heat recovery microwave oxygen-insulated dryer according to claim 1 or 2, wherein the convection fan is composed of a motor and fan blades.