Heat recovering and preheating device for dryer

Abstract

The invention discloses a heat recovering and preheating device for a dryer. The heat recovering and preheating device comprises the dryer and a preheating device body, wherein the dryer consists of a drying oven and a hot-blast stove; the preheating device body consists of a preheating box and a conveyor belt; the conveyor belt is positioned at the bottom of the preheating box and penetrates through the preheating box; a heat storage bin is arranged at the top inside the preheating box; air holes are formed in the bottom of the heat storage bin; the periphery hole edges of the air holes are upwards protruded; a draining pipe is arranged at the bottom of the heat storage bin and is connected to the bottom of the preheating bin; draining holes are formed in the bottom of the preheating box; the heat storage bin is connected with an exhaust pipe of the drying oven through a pipeline; exhaust holes are formed in side walls of the periphery of the preheating box. According to the heat recovering and preheating device disclosed by the invention, tea leaves are subjected to preheating treatment by using high-temperature and high-moisture waste gases exhausted from the drying oven. The heat recovering and preheating device disclosed by the invention has the advantages of simple structure, good practical effect, simplicity in production, low cost and resource saving; the benefits of a tea factory are greatly increased; the heat recovering and preheating device is worthy of being popularized and applied.

Description

technical field [0001] The invention relates to the field of tea processing equipment, in particular to a heat recovery and preheating device for a dryer. Background technique [0002] In the process of tea processing and production, it is necessary to use a dryer to dry the tea to remove the water in the tea, reduce the water content in the tea cells, reduce its activity and remove the semipermeability of the cell membrane, so as to ensure that the subsequent processing can be normal and went well. The water in the tea leaves must be fully dried before they can be put into the pot for frying, otherwise they will form lumps in the frying machine, and the tea juice will stick to the wall of the pot. The existing dryers dry the tea leaves at one time to remove the moisture contained in the tea leaves. However, it takes time to increase the temperature of the tea leaves when the low-temperature tea leaves enter the dryer, and the moisture evaporates in the early stage of dryin...

AI Technical Summary

Problems solved by technology

The existing dryers dry the tea leaves at one time to remove the moisture contained in the tea leaves. However, it takes time to increase the temperature of the tea leaves when the low-temperature tea leaves enter the dryer, and the moisture evaporates in the early stage of drying. If the amount is large, the moisture in the tea leaves will be more and a large amount of evaporation will cause the gas in the dryer to contain very high moisture, and the ultra-high humidity will affect the evaporation of moisture in the next step, which will easily cause the drying time of the dryer to be longer. Long, poor drying efficiency

[0003] Existing dryers send hot air from the air inlet into the hot air bin below the screen. After the hot air dries the tea leaves on it through the screen, it is discharged from the air outlet on the top of the bin. The tuyere is equipped with an exhaust fan, and the exhaust air is faster. The air discharged in this way not only contains a certain amount of water and dust, but also has a higher temperature. Therefore, such direct discharge will inevitably waste heat energy resources, which is not conducive to the energy saving and consumption reduction of tea enterprises. Affect the economic benefits of tea enterprises

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