CN102429010B - Solar hybrid energy hot steam wind farm produce-drying system - Google Patents

Abstract

The invention discloses a solar energy mixed energy steam hot air drying system for agricultural products, which consists of solar steam equipment, belt hot air drying equipment and a control system. The belt hot air drying equipment includes a control system and a drying tunnel. type material conveying device and circulation fan, and a heat exchange device is installed under the belt type material conveying device. The steam distribution drum, the output steam end of the steam distribution drum is connected to the heat exchange device through a valve, and the solar boiler, and other fuel boilers or electric boilers provide steam for the steam distribution drum. On the basis of using solar energy as the main energy source, the present invention introduces steam generated by other energy sources in the form of a steam distribution drum for comprehensive utilization, thereby overcoming and making up for the deficiency of solar energy. It can complete the drying of grain, food and vegetables.

Description

Solar energy mixed energy steam hot air agricultural product drying system

Technical field:

The invention relates to a solar steam hot air drying system. It uses the solar steam device as the main heat source, supplemented by the steam generated by other energy sources, and distributes it through the steam distribution drum to supply the drying equipment to dry the agricultural products.

Background technique:

The development and utilization of new energy and renewable energy has become a major global issue. The application and promotion of solar steam technology can well solve the problem of high drying cost of agricultural products. Especially for those rural areas that lack electricity and coal, abundant solar energy is inexhaustible, which can provide energy for drying and deep processing of agricultural products. The solar steam hot air drying system is used to dry materials, which has the characteristics of energy saving, pollution-free, high efficiency, etc., and fully conforms to the general direction of national production capacity development. However, solar energy is greatly affected by weather factors. In the case of low solar radiation power, the drying efficiency will be greatly affected. This is also the limitation that solar energy is applied to industrial production. The present invention uses solar energy as the main energy. , and introduce steam generated by other energy sources in the form of sub-steam drums for comprehensive utilization, thereby overcoming and making up for the deficiency of solar energy. If the original enterprise has a fuel boiler or an electric boiler, it can be directly compatible and used.

Contents of the patent:

The invention provides a solar energy mixed energy steam hot air agricultural product drying system, which can complete the drying of grain, food and vegetables.

Technical scheme of the present invention is as follows:

The solar energy mixed energy steam hot air drying system for agricultural products includes solar steam equipment, belt hot air drying equipment and a control system. The hot air drying equipment includes a control system and a drying tunnel. A belt material conveying device and a circulating fan are installed in the drying tunnel. A heat exchange device is installed under the belt conveying device. The circulating fan blows hot air in the drying tunnel. Internal circulation, several drainage fans are installed on the top of the drying tunnel, including a steam distribution drum, and the output steam end of the steam distribution drum is connected to the heat exchange device, solar boiler, and other fuel boilers or electric boilers through a valve. The boiler supplies steam to the steam distribution drum.

The drying tunnel is composed of a preheating section, a high temperature section and a low temperature section. There is an isolation device between each section. A heat exchange device is installed under each section's inner belt material conveying device. A circulating fan and a drainage system are installed on the top of each section. Fan, each section independently constitutes a hot air circulation.

Temperature and humidity sensors are installed in each section, and the input of steam in each section of heat exchange device and the adjustment of circulating fan are controlled by temperature detection, and the temperature of each section of the dryer is adjusted according to the humidity or moisture of the material.

The water outlet pipe of the heat exchange device is connected to an external filter and then connected to the water supply device.

An electric auxiliary heating system is installed on the heat exchange device to overcome the influence of rain and insufficient solar radiation on the steam volume.

The transmission network belt of the belt-type material transmission device is located below the drying tunnel and is equipped with a network frame. The bottom of the network frame is an elastic network, and the periphery is provided with a protective frame. , elastic balls are placed in each grid, and the elastic balls just stand on the transmission mesh belt or have a gap with the transmission mesh. When the material on the transmission mesh belt reaches the position above the grid frame, the transmission mesh belt presses down on the elastic balls And the elastic net, when the material passes through, the elastic net and the elastic ball bounce up, which has the effect of moving the material on the impact transmission net belt upwards.

The outlet of the drainage fan in the high-temperature section is equipped with an adjustable damper and an air purification and dehumidification device. The damper can guide the discharged hot air to different air ducts, which can be discharged directly, or it can be redistributed after being treated by the air purification and dehumidification device. Introduced into the warm-up section.

The solar steam device is a high-temperature steam formed by eccentric focusing high-temperature heat collecting tube technology and refraction high-efficiency heat collecting plate technology. The steam is sent to the belt-type hot air drying equipment through the conveying pipeline, and the hot air is blown to the material through the heat exchange device and the circulating fan. surface, increase the temperature of the surface of the material, disperse the moisture on the surface of the material, and discharge the moisture on the surface of the material through the dehumidification pipe under the guidance of the drainage fan.

The system uses solar steam as the main heating source to dry the material through the drying device. Its temperature is controllable, and it can be segmented and variable temperature drying. The dried material has high efficiency, high quality, high yield and beautiful color. At the same time, solar steam is used as the heat source. Due to the high temperature used, the temperature of the drying room can be increased in a short time to ensure that the temperature of the drying room remains unchanged. At the same time, water resources can be saved, because the steam cycle requires less water and condensed water (about 60°C) can be sent to the solar device again through the filter, which can save water resources and reduce heat loss. On the basis of using solar energy as the main energy source, the invention introduces steam generated by other energy sources in the form of a steam distribution drum for comprehensive utilization, thereby overcoming and making up for the deficiency of solar energy. If the original enterprise has a fuel boiler or an electric boiler, it can be directly compatible and used.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the grid structure of the present invention.

Detailed ways

Solar energy mixed energy steam hot air drying system for agricultural products, including solar steam equipment, belt hot air drying equipment and control system, the solar steam equipment includes solar boiler 17, water supply pump 15, detection and control system, belt hot air drying equipment includes The control system 16 and the drying tunnel, the belt type material conveying device 1 and its conveying motor 10 are installed in the drying tunnel, the drying tunnel is composed of a preheating section, a high temperature section and a low temperature section, each section is 2-5 meters, between There is an isolation device, and a heat exchange device 4 is installed under each section of the inner belt material conveying device 1, and a circulation fan 7 and a drainage fan 3 are installed on the top of each section, and the outlet of the drainage fan 3 is connected to the exhaust pipe 8, 9 , Each section independently constitutes a hot air circulation. The transmission network belt 20 of the belt-type material transmission device is located below the drying tunnel and is equipped with a network frame 2. The bottom of the network frame 2 is an elastic net, and the periphery is provided with a protective frame. The network frame 2 is along the direction of travel of the transmission network belt. Divided into several grids 22, elastic balls 19 are placed in each grid; support rods 21 are arranged at intervals on the back of the transmission mesh belt 20; there is a gap between the elastic balls 19 and the transmission mesh belt 20, when the material on the transmission mesh belt 20 reaches the net When the position above the frame 2, the supporting rod 21 on the transmission mesh belt 20 presses down the elastic ball 19 and the elastic net, and when the material passes through, the elastic net and the elastic ball 19 are bounced up, and the material on the impact transmission net belt 20 is strung up. motion effect. Make the material have a short suspended state, so as to promote the rapid evaporation and discharge of the accumulated material moisture.

It includes a steam sub-drum 18, and the output steam end of the steam sub-drum 18 is connected to the heat exchange device 4 through a valve. Solar boiler 17 and other fuel boilers or electric boilers provide steam for steam sub-steam drum 18 through steam delivery pipeline 5. A steam solenoid valve 6 is installed on the steam delivery pipeline 5 . The outlet pipe of the heat exchange device 4 is externally connected to a three-way water valve 13, and the filter 14 is connected to a solar boiler 17 after passing through a replenishment pump 15. The steam input of the solar boiler 17 is provided with a steam switch 12 and a steam pressure gauge 11 in the pipeline of the sub-steam drum. The preheating section, the high temperature section and the low temperature section supply steam in sections, control the temperature in sections, and control the air supply volume.

Temperature and humidity sensors are installed in each section, and the input of steam in each section of heat exchange device and the adjustment of circulating fan are controlled by temperature detection, and the temperature of each section of the dryer is adjusted according to the humidity or moisture of the material.

An electric auxiliary heating system is installed on the heat exchange device to overcome the influence of rain and insufficient solar radiation on the steam volume.

The air outlet pipes 8 and 9 of the drainage fan in the high temperature section are equipped with adjustable dampers and air purification and dehumidification devices. The dampers can guide the discharged hot air to different air ducts, which can be directly discharged or through air purification. Reintroduced to the preheating section after treatment by the dehumidifier.

After the water is filtered through the three-way water valve 13 and the water purifier 14, it enters the supplementary water pump 15; the supplementary water pump will automatically send water into the solar boiler 17 according to the instructions detected by the solar steam boiler sensor. Become steam and enter the belt type material conveying device 1 through the three-way water valve 12 and the conveying pipeline 5,

When the temperature in the section reaches the required upper limit, the input of steam can be controlled through the solenoid valve 6. After the steam is input, it becomes hot air through the action of the heat exchange device 4 and the circulation fan 7 . The moisture discharged from the material is discharged from the drainage fan 3 along with the wind, and the transmission belt for conveying the material runs under the drive of the infinitely variable speed motor 10, and its conveying speed can be adjusted according to the requirements of the material. When the condensed water in the steam cycle passes through the filter 14 and the supplementary water pump 15, it can be recycled. The supplementary water source also can be directly supplied by tap water by three-way valve 13.

Claims (4)

1. solar energy energy mix steam hot wind Drying system of agricultural products, comprise the solar steam equipment, belt heated-air drying equipment and control system, described solar steam equipment comprises solar boiler, water replanishing device, detect and control system, it is characterized in that described belt heated-air drying equipment comprises control system and Drying tunnel, belt material transmitting device and circulating fan are installed in the Drying tunnel, be positioned at belt material transmitting device below heat-exchange device is installed, described circulating fan is advertised hot blast and is circulated in Drying tunnel, the Drying tunnel top is equipped with several wet-emitting blowers, include steam and divide drum, steam divides drum output steam end to access described jeat exchange device, solar boiler by valve, reach other fuel boiler or electric boiler and provide steam for steam divides drum;

Drying tunnel is comprised of preheating section, high temperature section and low-temperature zone, spacer assembly is arranged between every section, belt material transmitting device below is separately installed with heat-exchange device in every section, and every section top is equipped with circulating fan and wet-emitting blower, the independent formation of each section hot air circulation; Be separately installed with the sensor of temperature and humidity in each section, by the input of each section heat-exchange device quantity of steam that the detection of temperature is controlled, the adjustment of circulating fan, the temperature of adjusting each section of drying machine according to humidity or the moisture of material;

The transporting reticulation belt of described belt material transmitting device is positioned at the Drying tunnel below rack is installed, the rack bottom is elastic network(s), be arranged with outward and protect frame, described rack is separated into some lattice along the transporting reticulation belt direct of travel, all placed elastic pellet in every lattice, elastic pellet just in time withstands on the transporting reticulation belt or is gapped with transporting reticulation belt, when material on the transporting reticulation belt arrives the rack top position, transporting reticulation belt presses down elastic pellet and elastic network(s), when material by after bullet on elastic network(s) and the elastic pellet, play material on the transmission of impacts guipure vibration effect that makes progress.

2. solar energy energy mix steam hot wind Drying system of agricultural products according to claim 1 is characterized in that accessing water replanishing device behind the external filter of outlet pipe of heat-exchange device again.

3. solar energy energy mix steam hot wind Drying system of agricultural products according to claim 1 is characterized in that being equipped with on the described heat-exchange device the additional hot system of electricity, thereby overcomes overcast and rainy and solar irradiation deficiency to the impact of quantity of steam.

4. solar energy energy mix steam hot wind Drying system of agricultural products according to claim 1, adjustable ventilation door and air cleaning humidity-discharging device are equipped with in the wet-emitting blower outlet that it is characterized in that high temperature section, described air door can be guided the hot blast of discharging into different air channel, both can directly discharge, be reintroduced to preheating section after also can processing through the air cleaning humidity-discharging device.

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