Tobacco curing barn taking air source heat pump as heat source

Abstract

The invention discloses a tobacco curing barn taking an air source heat pump as a heat source, which comprises a heating chamber with a fresh air opening, and a drying chamber with temperature and humidity probes. A dehumidifying opening is reserved above the curing barn. The tobacco curing barn further comprises the air source heat pump and a condenser fan. The ratio of the heat exchange area ofa condenser to the input power of a compressor is numerically 7 to 12 m<2> / kw. The condenser and the suction type air supply fan thereof are arranged in the heating chamber. The drying chamber and / orthe heating chamber are / is provided with a heat preservation layer. By taking the air source heat pump and solar energy as the novel heat sources, the tobacco curing barn of the invention has the characteristics of energy saving, normal and stable running of a system, high energy efficiency ratio, convenient operation, capability of providing hot air at relatively higher temperature and greatly expanding the application range of the air source heat pump and the solar energy, and positive role in saving energy sources and protecting the environment. Due to the large-scale popularization and utilization of the technology in tobacco production areas, the sulfur content of the air, soil and tobacco can be reduced and the quality of the tobacco can be improved.

Description

technical field [0001] The invention relates to a tobacco curing barn, in particular to a tobacco curing barn using an air source heat pump as a heat source. Background technique [0002] As a big tobacco producing country, my country has been lagging behind in curing technology and equipment for a long time, and the economic losses caused by the influence of flue-cured tobacco technology are difficult to estimate. Tobacco flue-cured tobacco farmers operate in summer when the temperature is high. The traditional process is to burn coal for heating. The coal is burned in the combustion chamber (the heating chamber of a barn generally contains several combustion chambers) to release heat, and the furnace body (furnace lining and furnace lining protection cover) ) heating, the furnace lining protection sleeve is connected to the heat exchange tube and the chimney, and the gas and smoke in the combustion chamber will be discharged after heating the furnace body, heat exchange tu...

AI Technical Summary

Problems solved by technology

[0004] 2. The temperature rise of flue-cured tobacco is a slow temperature rise process from low to high. Due to the hysteresis of coal-fired heating, when the temperature reaches a certain set value, the temperature rise must be stopped. Even if the combustion chamber damper is turned off, the temperature will continue to rise , affect the quality of flue-cured tobacco, and can only adjust the temperature of the tobacco leaf environment in the drying room by adding fresh air, resulting in energy waste and affecting the humidity control of the tobacco leaf environment

For example, in the "yellowing" stage, the ambient temperature of the tobacco leaves in the drying room is generally 33°C-42°C (the lower limit temperature for yellowing is determined according to the tobacco leaves in different parts of the upper, middle, and lower parts), and the drying room is heated after the fresh tobacco leaves are installed. It takes -4 hours to reach the lower limit temperature required for the tobacco leaves to turn yellow, which takes time and increases the blowing of the wind on the fresh tobacco leaves

For example, in the "fixing color" stage, if several combustion chambers change coal at the same time or the watchman delays and does not add coal in time, the temperature of the drying chamber will drop sharply, which will affect the quality of flue-cured tobacco, and the water vapor in the drying chamber will form when it is cold. Water droplets, attached to the tobacco leaves, appear "hanging ash" phenomenon

The poor quality of coal will also affect the quality of flue-cured tobacco

[0006] 3. High labor intensity: In high temperature weather, during the several-day-long flue-curing process of Yifang tobacco, each curing room needs special personnel to take care of it on site, adjust the opening of the new air outlet or the humidity outlet, and monitor the state of coal combustion in the combustion chamber. Make adjustments, change coal every few hours, transport coal slag, etc.

When tobacco farmers are on night shift, they often oversleep and fail to add coal in time, which affects the quality of flue-cured tobacco

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