CN103005629A - Microwave and hot air combined red date dryer - Google Patents

Abstract

The invention discloses a microwave hot air combined jujube drying machine. A microwave drying box is installed horizontally on the bracket, a microwave emitting device and a humidity control device are installed on the inner top surface, and a jujube conveyor belt is horizontally arranged in the microwave drying box. , the humidity control device is connected with the microwave emission device and the motor through the controller; the rear part of the microwave drying box is connected with the hot air drying box through a bellows, the rear end of the jujube conveyor belt extends into the hot air drying box, and the middle part of the hot air drying box A vibrating conveying screen is installed inside. The front and rear ends of the bottom of the hot air drying box are respectively hinged on the long rocker and the short rocker. The auxiliary motor drives the short rocker to swing through the crank linkage mechanism. An exhaust pipe is connected to the top, and the other end of the exhaust pipe is connected to the heat exchanger. The exhaust pipe of the heat exchanger communicates with the hot air outlet on the bottom surface of the front part of the hot air drying box through the electric heating pipe and the air intake pipe. A hot air guide plate is arranged on the inner bottom surface of the hot air drying box at the mouth.

Description

Microwave hot air combined jujube dryer

technical field

The invention relates to a jujube drying mechanical device, in particular to a jujube drying machine combined with microwave hot air.

Background technique

Jujube is a characteristic fruit with the same origin of medicine and food. It has a long history of cultivation in my country. Its fruit has extremely high nutritional and health value and medicinal value. It is a health fruit that integrates the three functions of nutrition, food and tonic. In recent years, the jujube industry in Xinjiang has developed rapidly, and its cultivation area and output have become one of the fastest-growing industries in Xinjiang's forestry and fruit industry. Moreover, dried red dates have always been the main processing method of red dates in Xinjiang, accounting for about 70% of the total amount of red dates. The dried processing methods are mainly natural drying and ordinary hot air drying. These drying processing methods often have a long drying time. The disadvantages of high energy consumption, large environmental pollution, and poor quality of dried jujube products.

Contents of the invention

The object of the present invention is to provide a microwave hot air combined jujube dryer, which has a reasonable structure, is clean and hygienic to use, can quickly dry jujubes, and effectively improves the economic benefits of jujube production.

The purpose of the present invention is achieved in this way, a microwave hot air combined jujube dryer, comprising a bracket and a base equipped with a motor, a microwave drying box is installed horizontally on the bracket, and a microwave emitting device and humidity Control device, the jujube conveyor belt driven by the motor is installed horizontally in the microwave drying box, the humidity control device is connected with the microwave emission device and the motor through the controller; the rear of the microwave drying box is connected to the hot air with a discharge port Drying box, the rear end of the jujube conveyor belt extends into the hot air drying box, a vibrating conveyor screen is installed in the middle of the hot air drying box, and the front and rear ends of the bottom of the hot air drying box are respectively hinged on the long rocker and the short rocker , the auxiliary motor installed on the base drives the short rocker to swing through the crank linkage mechanism, an exhaust pipe is connected to the top surface of the rear part of the hot air drying box, and the other end of the exhaust pipe is connected to an exhaust fan A heat exchanger with an air inlet and an exhaust port. The exhaust pipe of the heat exchanger is connected to the hot air outlet on the bottom surface of the front part of the hot air drying box through the air inlet fan, the electric heating pipe, and the air inlet pipe in turn. A hot air guide plate is arranged on the inner bottom surface of the hot air drying box, and the upper ends of the hot air guide plate respectively extend under the bottom surface of the vibrating conveying screen.

At the inlet end of the microwave drying box, cloth panels and sealing curtains are sequentially arranged at intervals from the outside to the inside.

The drying process is as follows: jujubes fall into the conveyor belt from the feeding hopper, and then enter the microwave drying box after passing through the distribution board. The microwave emission device located on the upper part of the microwave drying box is activated, and the humidity control device adjusts the humidity in the box; After entering the microwave drying box, the red dates continue to move on the conveyor belt, and microwave drying is realized during the movement; the red dates after microwave drying are transported by the conveyor belt into the hot air drying box, and fall into the vibrating conveyor screen; The hot air generated by the fan enters the bottom of the hot air drying box through the air intake pipe, and after being diverted by the deflector, it moves upward from the bottom of the vibrating screen to heat and dry the red dates; the vibrating conveying screen vibrates while transporting the red dates. It is in full contact with dry and hot air, and the red dates are heated and dried in all directions, which improves the drying speed and efficiency. The dried red dates are output through the discharge port. The whole machine is continuous drying, easy to control, and easy to work. efficient.

Microwave is clean energy. Microwave is a kind of high-frequency wave. When it acts, it causes high-speed wheel pendulum motion of water molecules in the material. They rub against each other to generate great heat, which can dry the material conveniently. Compared with the traditional drying method, it has the advantages of high drying rate, energy saving, high production efficiency, uniform drying, clean production, easy automatic control and improved product quality. Hot air drying is the principle of using energy materials such as electricity, coal or natural gas to heat hot air to dry materials. This drying method has the characteristics of cleanliness, uniform heating of materials, and easy control.

According to the characteristics of microwave heating drying and hot air heating drying, the combination of these two drying methods has obvious advantages in increasing the drying rate, reducing energy consumption and improving the quality of dried jujube products. Therefore, the development of Xinjiang jujube The development and utilization of microwave and red date linkage drying equipment has a good prospect. The present invention utilizes the organic combination of microwave drying and hot air drying to dry the graded and cleaned red dates under certain microwave conditions for a period of time, and then quickly enters the hot air drying box for further drying, making full use of the principles of microwave heating and drying and hot air drying Drying red dates makes the equipment clean, high working efficiency, simple structure, reliable performance, shortening drying time and greatly saving energy, and improving the quality of dried red dates. The drying process of the microwave hot air combined with jujube dryer adopts the combined action of microwave and hot air to heat. The microwave mainly heats and dries the jujube from the inside to make the water move outward quickly. The hot air mainly heats and dries the jujube from the outside to the inside to take away the moisture. , the combination of the two can quickly and efficiently dry red dates, and at the same time avoid the damage to the internal quality of red dates by single microwave heating.

The invention has a reasonable structure, can quickly dry red dates, and effectively improves the economic benefits of red dates production.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the front view structure of the present invention.

Detailed ways

A kind of microwave hot air combined jujube drying machine, as shown in Figure 1, comprises support 28 and the base 27 that electric motor is housed, feed hopper 2 and microwave oven 5 are installed horizontally on the support, and the inner top surface is installed Microwave emission device 6 and humidity control device 7, the jujube conveyer belt 1 driven by electric motor is arranged horizontally in the microwave oven. The humidity control device 7 is connected with the microwave emission device and the motor through the controller; the humidity control device 7 keeps the temperature in the body at an appropriate value by controlling the working power of the microwave emission device 6, and can also be controlled by controlling the speed of the conveyor belt 1 The drying time finally controls the drying degree of red dates, and the humidity control device 7 realizes the regulation of humidity by controlling the dehumidifying device.

The rear part of the microwave drying box is connected with a hot air drying box 9 with a discharge port through a bellows 8. The rear end of the jujube conveyor belt 1 extends into the hot air drying box 9, and a vibration conveying box is installed in the middle of the hot air drying box 9. Sieve 10, the front and rear ends of the bottom of the hot air drying box are respectively hinged on the long rocker 26 and the short rocker 18.

The auxiliary motor 22 installed on the base drives the short rocker 18 to swing through the crank linkage mechanism. As shown in FIG. 1 , said crank-link mechanism includes a crank wheel 20 on which a connecting rod 19 is eccentrically hinged, and the other end of the connecting rod 19 is hinged on the short rocker 18 . Auxiliary motor 22 rotates through belt 21 transmission crank wheel.

An exhaust pipe 12 is connected to the top surface of the rear part of the hot air drying box, and the other end of the exhaust pipe 12 is connected to a heat exchanger 16 with an air inlet 15 and an air outlet 17 through an exhaust fan 14. The exhaust port 17 is connected to the free end of the exhaust pipe 12 in the heat exchanger 16 . Air inlet 15 is connected with air filter.

The exhaust pipe of the heat exchanger communicates with the hot air outlet on the bottom surface of the front part of the hot air drying box through the air intake fan 23, the electric heating pipe 24, and the air inlet pipe 25 in turn. Deflector 11, the upper end of hot air deflector 11 stretches under the bottom surface of vibrating conveying screen 10 respectively.

Heat exchange and air heating part: the heat exchange part mainly uses the waste heat of the exhaust to preheat the dry air entering the box. The working process is: after drying, the hot air with waste heat passes through the exhaust pipe 12 and is driven by the exhaust fan 14 It enters the heat exchanger 16 to preheat the intake air and is discharged from the exhaust port 17; the dry air is preheated by the heat exchanger 16 through the air intake port 15, and then is further heated by the electric heating tube 24 under the drive of the intake fan 23 After entering the hot air drying box by the air intake pipe 25, the waste heat of the exhaust can be fully utilized by utilizing the heat exchanger, so as to save energy.

Because the hot air drying box is inclined backward, the vibrating conveying screen 10 is arranged obliquely, and its inclination angle is 5-10 degrees.

There are 5 hot air deflectors, and the angle between the hot air deflectors is 20-30 degrees. The hot air deflector 11 is set to evenly distribute the hot air, and the red dates on the vibrating conveying screen 10 are fully and evenly dried, shortening the drying time and improving the drying effect.

The entrance end place of microwave drying box is arranged with cloth plate 3 and sealing curtain 4 at intervals successively from outside to inside, and cloth plate 3 is in order to flatten the red date on the conveyer belt, and sealing curtain 4 is anti-microwave cloth curtain.

Claims (4)

1. microwave hot air combined red date dryer, comprise support and motored base, it is characterized in that: level is installed with microwave drying box on the support, microwave launcher and humidity conditioner are installed on its inside top surface, be horizontally disposed with in the microwave drying box by electric motor driven red date conveyer belt, humidity conditioner links to each other with microwave launcher and motor by controller; The microwave drying box rear portion is connecting the hot air drying box with discharging opening by bellows, the rear end of red date conveyer belt extends in the hot air drying box, the vibrating transportation sieve is installed in the hot air drying box middle part, the rear and front end, bottom surface of hot air drying box is hinged on respectively on long rocking bar and the short rocking bar, the secondary motor that is installed on the base drives short rocking bar swing by toggle, connecting a blast pipe on the end face of hot air drying box rear portion, the other end of blast pipe is connecting a heat exchanger with air inlet and exhaust outlet by air exhauster, the exhaust duct of heat exchanger is successively by ventilating fan and electrothermal tube, hot-air mouth on the anterior bottom surface of air inlet pipe and hot air drying box is connected, on the hot air drying box inner bottom surface at hot-air mouth place the hot blast deflector is being set, hot blast deflector upper end extends respectively under the bottom surface of vibrating transportation sieve.

2. microwave hot air combined red date dryer according to claim 1 is characterized in that: the vibrating transportation sieve is in tilted layout, and its angle of inclination is 5-10 degree.

3. microwave hot air combined red date dryer according to claim 1, it is characterized in that: the hot blast deflector is 5, the angle between the hot blast deflector is 20-30 degree.

4. microwave hot air combined red date dryer according to claim 1 is characterized in that: the entrance point place of microwave drying box from outside to inside successively the interval drapery panel and sealing curtain are being set.

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