CN206831988U - Solar energy hot blast drying system - Google Patents

Abstract

The utility model relates to a solar hot air drying system, which belongs to the field of food drying. It aims to solve the problem that the existing solar hot air drying device is difficult to realize continuous operation in rainy days and nights, and the drying of multi-layer materials is uneven. The solar hot air drying system mainly includes a solar air heat collector, a drying chamber, a material rack, a drying heating cylinder, a dryer and a fixed frame. The upper surface of the rotating platform is fixed with a drying heating cylinder, and there are multi-layer hot air ports on the drying heating cylinder. A fixing frame is arranged inside the drying heating cylinder, and the heater is arranged on the fixing frame. A material rack, an induced draft fan is installed on the top wall of the drying chamber, and an exhaust fan is arranged on the upper part of the side wall. The utility model makes the hot air on the multi-layer material rack evenly distributed through the drying and heating cylinder, and realizes the drying operation in rainy days or at night by using the heater in the heating cylinder.

Description

Solar hot air drying system

technical field

The utility model belongs to the field of food drying, in particular to a solar hot air drying system.

Background technique

Solar thermal utilization is widely used in industry and agriculture, and the drying process is a necessary process in the processing of food and agricultural by-products, and consumes a lot of energy. The drying process generally uses dry air as the heat carrier to heat the air through a solar water collector or a solar air collector. Since the structure of the solar air collector is relatively simple, it can directly convert solar energy into heat energy for heating the air, and then Drying is carried out by hot air, so solar air collectors have been widely used in recent years.

However, in rainy days and at night, it is impossible to realize the utilization of solar energy, and it is difficult to realize continuous drying operations. Moreover, for the drying of a large number of multi-layered food and agricultural by-products, there will also be problems of uneven drying.

Utility model content

The purpose of the utility model is to provide a solar hot air drying system in order to solve the problem that the existing solar hot air drying device is difficult to realize continuous operation in rainy days and at night, and the drying of multi-layer materials is uneven.

The solar hot air drying system of the utility model includes a solar air heat collector, a fan, a drying room, a multi-layer material rack, a drying heating cylinder, a dryer, a fixing frame, a heater, an exhaust fan and an induced draft fan, and is located at the center of the bottom plate of the drying room. A dryer is provided, a rotating platform is arranged on the upper part of the dryer, a drying and heating cylinder is fixed on the upper surface of the rotating platform, and multi-layer hot air ports are opened along the axial direction of the drying and heating cylinder. The fixed frame, the heater is set on the fixed frame, and there are multiple multi-layer material racks around the drying heating cylinder in the drying room, and the temperature sensor and the humidity sensor are arranged on the side wall of the drying room. An exhaust fan is installed on the upper part of the side wall, and at least one induced draft fan is installed on the top wall of the drying chamber;

The air outlet of the solar air heat collector communicates with the air inlet of the dryer through the first air pipe, a fan is arranged in the first air pipe, one end of the second air pipe communicates with the induced draft fan, and the other end of the second air pipe One end communicates with the first air pipe, and air valves are respectively arranged on the first air pipe and the second air pipe.

The solar air collector in the solar hot air drying system directly converts solar energy into heat energy. The temperature of the air flowing through the solar air collector rises, and after being dried and filtered by the dryer, it enters the drying and heating cylinder. There are holes on the outer wall of the drying and heating cylinder. The multi-layer hot air outlet drives the drying and heating cylinder to rotate through the rotating platform, so that the hot air outlet of the drying and heating cylinder is aligned with each layer of the material support plate of the multi-layer material rack, so that the food or agricultural by-products on each layer of material support plate can be evenly dried.

In cloudy and rainy days, at night or when the hot air heat provided by the solar air collector is insufficient, the heater in the drying heating cylinder is turned on, and the temperature of the hot air is increased by electric heating to realize continuous operation of hot air drying. When the temperature of the hot air is stable, the hot air passes through the first air pipe and the second air pipe to form a closed-loop circulation, while improving the drying efficiency.

The solar hot air drying system described in the utility model can be applied in drying operations of agriculture, agricultural products and food.

Description of drawings

Fig. 1 is the structural representation of the utility model solar hot air drying system.

detailed description

Specific Embodiment 1: The solar hot air drying system in this embodiment includes a solar air heat collector 1, a fan 2, a drying chamber 3, a multi-layer material rack 4, a drying heating cylinder 5, a dryer 6, a fixed frame 7, a heater 8, The exhaust fan 11 and the induced draft fan 12 are provided with a drier 6 at the center of the bottom plate of the drying chamber 3, a rotating platform 10 is arranged on the top of the drier 6, and a drying heating cylinder 5 is fixed on the upper surface of the rotating platform 10. The axial direction of the drying heating cylinder 5 is provided with a multi-layer hot air port 5-1, a fixed frame 7 is arranged inside the drying heating cylinder 5, and the heater 8 is arranged on the fixed frame 7, and the drying heating cylinder 5 A plurality of multi-layer material racks 4 are placed around the center, a temperature sensor 13 and a humidity sensor 14 are arranged on the side wall of the drying chamber 3, an exhaust fan 11 is arranged on the side wall top of the drying chamber 3, and the drying chamber 3 At least one induced draft fan 12 is installed on the top wall;

The air outlet of the solar air heat collector 1 communicates with the air inlet of the dryer 6 through the first air pipe 20, and a fan 2 is arranged in the first air pipe 20, and one end of the second air pipe 21 communicates with the induced draft fan 12 , the other end of the second air duct 21 communicates with the first air duct 20 , and dampers 23 are provided on the first air duct 20 and the second air duct 21 respectively.

In this embodiment, an induced draft fan is installed at the air inlet of the solar air heat collector.

Embodiment 2: This embodiment differs from Embodiment 1 in that an insulating layer is attached to the inner wall of the drying chamber 3 .

In this embodiment, the heat loss of the drying chamber is reduced through the insulation layer.

Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that a supercharger 24 is also provided in the subsequent pipeline of the fan 2 in the first air duct 20 .

Specific embodiment four: what this embodiment is different from specific embodiment one to three is that a vacuum pump 15 is arranged on the outer top wall of the drying chamber 3, and one end of the vacuum tube 16 is connected with the vacuum pump 15, and the other end of the vacuum tube 16 is connected to the drying chamber. Room 3 communicates.

In this embodiment, a vacuum pump is used to evacuate the drying chamber to lower the drying temperature and shorten the drying time.

Embodiment 5: The difference between this embodiment and one of Embodiments 1 to 4 is that an ultraviolet lamp 9 is also provided on the fixing frame 7 .

In this embodiment, the drying gas can be sterilized by the ultraviolet lamp.

Specific embodiment six: This embodiment is different from one of the specific embodiments one to five in that the multi-layer material rack 4 is provided with a multi-layer material receiving plate 4-2 along the axial direction of the straight rod 4-1, and the straight rod 4- 1 is driven to rotate by a drive motor 4-3.

Embodiment: The solar hot air drying system in this embodiment includes a solar air heat collector 1, a fan 2, a drying chamber 3, a multi-layer material rack 4, a drying heating cylinder 5, a dryer 6, a fixed frame 7, a heater 8, and an exhaust fan 11 and induced draft fan 12, a drier 6 is arranged at the center of the bottom plate of the drying chamber 3, a rotating platform 10 is arranged on the top of the drier 6, and a drying heating cylinder 5 is fixed on the upper surface of the rotating platform 10. The cylinder 5 is provided with a multi-layer hot air outlet 5-1 in the axial direction, and a fixed frame 7 is arranged inside the drying and heating cylinder 5. The heater 8 and the ultraviolet lamp 9 are arranged on the fixed frame 7, and are heated by drying in the drying chamber 3. A plurality of multi-layer material racks 4 are placed around the cylinder 5 as the center, a temperature sensor 13 and a humidity sensor 14 are arranged on the side wall of the drying chamber 3, and an exhaust fan 11 is arranged on the upper part of the side wall of the drying chamber 3. Two induced draft fans 12 are installed on the top wall of the chamber 3;

The air outlet of the solar air heat collector 1 communicates with the air inlet of the dryer 6 through the first air pipe 20, and a fan 2 is arranged in the first air pipe 20, and one end of the second air pipe 21 communicates with the induced draft fan 12 , the other end of the second air duct 21 communicates with the first air duct 20, the first air duct 20 and the second air duct 21 are each provided with a damper 23, and the outer wall of the drying chamber 3 is provided with an electrical controller 17 .

The fixed frame in this embodiment has a multi-layer structure, and the heater and the ultraviolet lamp can be arranged in different layers of the fixed frame. The hot air port of the drying heating cylinder can be covered with a sealing cover. The heater, ultraviolet lamp, temperature sensor, humidity sensor and each fan are controlled by the electrical controller.

In this embodiment, there may be multiple solar air heat collectors, and each solar air heat collector communicates with the gas pipe in parallel.

The drying process of the solar hot air drying system in this embodiment is as follows: adjust the rotating platform so that the hot air outlet of the drying heating cylinder is aligned with the material receiving plates of the surrounding multi-layer material racks, and the hot air in the solar air collector enters the drying process through the first air duct. In the dryer, the hot air after drying and filtering is dispersed on different layers of the material shelf through the hot air port of the drying and heating cylinder, so that the food on each layer of material receiving plate is dried evenly. The heater in the drying and heating cylinder can be selectively turned on to compensate The heat of the hot air is insufficient. After the temperature of the hot air is stabilized, the hot air in the drying room will return to the drying room through the second air duct and the first air duct in turn through the induced draft fan, so as to improve the drying efficiency. When the humidity sensor detects that the air humidity in the drying room is relatively high, then The air is removed by means of an exhaust fan.

Claims (6)

1. solar energy hot blast drying system, it is characterised in that the solar energy hot blast drying system includes solar energy air heat collector (1), blower fan (2), hothouse (3), multilayers bin (4), dry heat cylinder (5), drier (6), fixed mount (7), heater (8), exhaust blower (11) and air-introduced machine (12), are provided with drier (6) at the bottom plate center of hothouse (3), in drier (6) Top be provided with rotation platform (10), be fixed with dry heat cylinder (5) in the upper surface of rotation platform (10), along dry plus The axial direction of hot cylinder (5) is provided with multilayer hot-air mouth (5-1), and fixed mount (7), heater are internally provided with dry heat cylinder (5) (8) it is arranged on fixed mount (7), surrounding is placed with multiple multilayer doses centered on dry heat cylinder (5) in hothouse (3) Frame (4), temperature sensor (13) and humidity sensor (14) are provided with the side wall of hothouse (3), in the side of hothouse (3) Wall top is provided with an exhaust blower (11), and an at least air-introduced machine (12) is provided with the roof of hothouse (3)；

The air outlet of solar energy air heat collector (1) is connected by the first airduct (20) with the air inlet of drier (6), Blower fan (2) is provided with one airduct (20), one end of the second airduct (21) is connected with air-introduced machine (12), the second airduct (21) The other end is communicated with the first airduct (20), and air-valve (23) is each provided with the first airduct (20) and the second airduct (21).

2. solar energy hot blast drying system according to claim 1, it is characterised in that adhere on the inwall of hothouse (3) There is heat-insulation layer.

3. solar energy hot blast drying system according to claim 1, it is characterised in that the blower fan (2) in the first airduct (20) Follow-up pipeline in be additionally provided with supercharger (24).

4. solar energy hot blast drying system according to claim 1, it is characterised in that in the exterior top wall of hothouse (3) It is provided with vavuum pump (15), one end connection vavuum pump (15) of vacuum-pumping tube (16), the other end of vacuum-pumping tube (16) and drying Room (3) communicates.

5. solar energy hot blast drying system according to claim 1, it is characterised in that be additionally provided with purple on fixed mount (7) Outside line lamp (9).

6. solar energy hot blast drying system according to claim 1, it is characterised in that multilayers bin (4) is along straight-bar The axial direction of (4-1) is provided with multilayer stock supporting plate (4-2), and straight-bar (4-1) is driven by motor (4-3) to be rotated.