Fire tube type heating device applied to flue-cured tobacco three-dimensional seedling raising greenhouse

Abstract

The invention discloses a fire tube type heating device applied to a flue-cured tobacco three-dimensional seedling raising greenhouse. The fire tube type heating device is characterized by comprising a stove (1), a radiator and a flow guide draught fan (4), wherein the radiator is arranged at the bottom of a tobacco seedling raising tray bracket (3) inside the greenhouse, and a hot air inlet of the radiator is communicated with a smoke outlet (11) of the stove through a pipeline; a hot air outlet is connected to the flow guide draught fan (4); the radiator comprises multiple radiating tubes (21) and multiple fire boxes (22); the fire boxes (22) are hollow cavities with pipeline connecting ports at two ends; and the fire boxes are connected end to end through the radiating tubes. The fire tube type heating device applied to the flue-cured tobacco three-dimensional seedling raising greenhouse has a simple structure, convenience in use, high heat efficiency of the device, a fast heating speed and low use cost. The heating device adopts the fire tubes to heat directly in the greenhouse, so that the heat efficiency can be up to 85%, and 5 DEG C can be increased per each hour for a greenhouse of 240 cubic meters.

Description

technical field [0001] The invention relates to a crop greenhouse, in particular to a temperature-increasing greenhouse for three-dimensional growth of flue-cured tobacco seedlings. Background technique [0002] With the improvement of the quality of tobacco leaf raw materials in the cigarette industry in recent years, various production areas have optimized and adjusted the cultivation techniques, especially in ensuring the growth period of tobacco leaves in the field. The concept of "fertile period" has been applied to achieve certain results. However, most of the tobacco seedlings in my country are transplanted in early spring, and the external temperature is low. If the temperature is lower when transplanting in advance, the survival rate of the tobacco seedlings is not high after planting, and the slow seedling period is longer. Therefore, in order to transplant in advance, it is necessary to increase the temperature. The quality of tobacco seedlings when transplanting....

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Problems solved by technology

[0004] At present, there are many studies on increasing the temperature of flue-cured tobacco seedling greenhouses, such as adopting heat insulation layer under the seedling tray support, making cold-proof ditch around the seedling pool, and using multi-layer covering films to improve the temperature in the greenhouse, but the above methods are all dominated by the external environment temperature , under different climatic conditions, the heating effect is not obvious; in the past two years, electric heating, boiler steam heating, solar heating and other methods have also been used to increase the temperature of the greenhouse, but the input and operating costs are relatively large

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