CN204969200U - Desiccator is stored to high wet grain - Google Patents

Abstract

The utility model discloses a desiccator is stored to high wet grain belongs to agricultural machinery, including separating the storehouse body that meets more than two side by side, the storehouse body is including grain discharging device, drying chamber, draft chamber, heat recovery room and store dry storehouse, the air intake connection of draft chamber has the fan, the utility model discloses can be used to the predrying of high wet grain, its make full use of natural air carries out the drying to the wet grain of height, can realize the high wet rapid draing of grain under the lower temperature, and is energy -concerving and environment -protective, concentrates dry facility for large -scale grain and provides an energy -efficient drying equipment in advance.

Description

High humidity grain storage dryer

Technical field:

The utility model belongs to an agricultural mechanical equipment, in particular to a high-humidity grain storage and drying machine.

Background technique:

The rice harvesting period in southern China is concentrated and the moisture content is mostly above 22% to 28%. It is easy to generate heat and deteriorate when stored in a high-temperature and high-humidity environment. At present, there are various types of dryers such as bin type, cross flow, counter flow, mixed flow, circulation type and drum type on the market in our country, but the content that touches the essence of the capacity consumption of the grain drying system is scarce, because grain is a heat-sensitive material, especially in high moisture content The state is sensitive to the drying temperature, if the temperature is too high or the process and parameters are improper, it will cause quality loss. Existing large-scale continuous dryers have requirements on the initial moisture content and unevenness of the incoming wet grains. If these factors are ignored during drying, it will result in increased grain burst rate, high energy consumption, and uneven drying. Since grain is a heat-sensitive material, especially in a state of high moisture content, it is sensitive to drying temperature. Too high temperature or improper process and parameters will cause quality loss. Increasing the drying temperature for high-humidity grains cannot effectively improve the energy consumption of evaporating water, resulting in excessive energy waste.

Invention content:

The purpose of the utility model is to provide a high-efficiency and energy-saving pre-drying equipment for large-scale grain centralized drying facilities, so as to overcome the fact that the grain dryers in the prior art cannot effectively improve the energy consumption of evaporating water in the process of drying high-humidity grains. Cause excessive energy waste.

The utility model is realized by adopting the following technical solutions: a high-humidity grain storage and drying machine, comprising more than two side by side separate and connected bin bodies, the bin body includes a grain discharge device, a drying chamber, a ventilation chamber, and a heat recovery chamber and the storage drying bin, the air inlet of the ventilation chamber is connected with a fan.

Preferably, the compartment body is separated from the compartment body by a breathable plate with mesh.

Preferably, the heat recovery chamber is provided with a flue gas inlet and a flue gas outlet.

Preferably, the upper part of the storage and drying bin is an open structure.

Preferably, a top cover is provided above the storage and drying bin.

Preferably, the grain discharge device includes a conical bin bottom and a grain discharge valve.

Preferably, ventilating panels with mesh are installed around the drying chamber and ventilation chamber.

Compared with the prior art, the beneficial effects of the utility model are:

①Using normal temperature air and recovering the waste heat of the drying system for drying, which improves the drying efficiency and reduces the subjective heat consumption and drying medium consumption;

②Using the air at normal temperature, the dehumidification and cooling of high-humidity grains in the storage and drying warehouse is realized, and heat energy is spontaneously obtained from the environment;

③The storage and drying machine warehouse can prolong the high-humidity storage period of grain by more than 3 times, alleviate the drying processing time, effectively suppress the drying burst and avoid the mass loss in the process of stacking a large amount of wet grain before centralized drying;

④The temperature of the airflow in the storage dryer cannot be lowered below its dew point, which avoids the phenomenon that the lower layer is dry and the upper layer absorbs moisture, and the drying uniformity is improved;

⑤Through the segmental treatment of the storage drying bin and the drying tower, the storage period of the material before reaching the moisture in the storage is extended, and the annual utilization rate of the drying equipment is improved.

Description of drawings:

Fig. 1 is the front view of the utility model;

Fig. 2 is a left view of the utility model;

Fig. 3 is the structural diagram of ventilation chamber and heat recovery chamber of the present utility model;

Figure 4 is a graph showing the relationship between water binding energy and moisture content in corn.

In the figure: 1. grain discharge device; 2. drying room; 3. air inlet; 4. ventilation room; 5. smoke inlet; 6. smoke outlet; 7. heat recovery room; 8. storage and drying warehouse; top cover.

detailed description:

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

As shown in Figure 1 and Figure 2, a high-humidity grain storage dryer, its basic structure belongs to a square ventilating warehouse body, including more than two warehouse bodies connected side by side, and a breathable air vent with mesh is used between the warehouse bodies and the warehouse bodies. Plates are separated, and the warehouse body includes a grain discharge device 1, a drying chamber 2, an air inlet 3, a ventilation chamber 4, a heat recovery chamber 7, and a storage and drying chamber 8. Grain discharge device 1 is a conical silo bottom, and an independent grain discharge valve is installed at the bottom of the silo bottom. Therefore, after each type of grain is sent into its own drying silo, there will be no difference with other grains during the drying process. The situation of grain mixing in the warehouse body; ventilation panels with mesh are installed around the drying chamber 2; air inlet 3 and ventilation chamber 4 are designed in the middle and lower parts of the utility model, and ventilation panels with mesh are installed around; Open and communicate directly with the atmosphere.

As shown in Figure 3, the heat recovery chamber 7 is provided with a flue gas inlet 5 and a flue gas outlet 6. The utility model makes full use of the flue gas waste heat of the supporting dryer through the flue gas inlet 5, the flue gas outlet 6, and the heat recovery chamber 7. To dry wet grain, the grain is continuously blown by the natural air in the ventilation chamber 4 to carry out continuous drying and heat dissipation; the bottom surface of the ventilation chamber 4 is open, and the flowing grain surface directly communicates with the drying chamber 2.

Through the experimental results, it can be concluded that the best quality drying conditions are as close as possible to natural shade drying. The test results show: 1. When the temperature is 30°C and the relative humidity is 40%, the grain temperature can be reduced to 10°C by using natural air, and the precipitation rate is above 0.76%/h. 2. Increasing the drying temperature for high-humidity grains cannot effectively improve the energy consumption of evaporating water, but increasing the drying temperature in the low-moisture area is conducive to strengthening the drying process and reducing the energy consumption of water evaporation. 3. When the dry basis moisture content of the grain is above 20%, the corresponding equilibrium moisture content curve of the grain is very close to the equal relative humidity of 90% of the air, and when the dry basis moisture content is above 30%, it is very close to the saturated humidity of the air line, which shows that natural air has a considerable drying capacity for high-humidity grains. The utility model makes full use of natural air to dry high-humidity grains, can realize rapid drying of high-humidity grains at a lower temperature, is energy-saving and environment-friendly, and provides a high-efficiency and energy-saving pre-drying equipment for large-scale grain centralized drying facilities.

Claims (7)

1. A high-humidity grain storage and drying machine, characterized in that: it comprises more than two side-by-side separate and connected bin bodies, and the bin body includes a grain discharge device (1), a drying chamber (2), and a ventilation chamber (4) , a heat recovery chamber (7) and a storage and drying bin (8), the air inlet of the ventilation chamber (4) is connected with a fan. 2. The high-humidity grain storage and drying machine according to claim 1, characterized in that: a breathable plate with mesh is arranged between the bin bodies. 3. The high-humidity grain storage and drying machine according to claim 1, characterized in that: the heat recovery chamber (7) is provided with a flue gas inlet (5) and a flue gas outlet (6). 4. The high-humidity grain storage and drying machine according to claim 1, characterized in that: the upper part of the storage and drying bin (8) is an open structure. 5. The high-humidity grain storage and drying machine according to claim 4, characterized in that: a top cover (9) is provided above the storage and drying bin (8). 6. The high-humidity grain storage and drying machine according to claim 1, characterized in that: the grain discharge device (1) comprises a conical silo bottom and a grain discharge valve. 7. The high-humidity grain storage and drying machine according to claim 1, characterized in that: ventilation panels with mesh are installed around the storage and drying chamber (2) and ventilation chamber (4).