Efficient hot blast furnace for tobacco baking equipment

Abstract

The invention provides a high-efficiency hot blast stove for tobacco leaf curing equipment, comprising: heat conducting tubes (1), finned tubes (2), furnace walls (3), furnace roofs (4) and steel fins (5) ; It is characterized in that the heat pipe (1) is a group of non-phase-change circulation loop heat pipes; the finned tube (2) is an aluminum alloy finned tube. The invention adopts a single-phase heat transfer mechanism, which greatly improves the heat transfer capacity of the heat-conducting device and the bearing capacity of the furnace temperature, breaks through various limit restrictions of the furnace temperature on the phase change heat transfer, and solves the problem that the ordinary phase change heat transfer mechanism is not competent The high-density heat transfer condition, and through the integrated design of fuel combustion and heat dissipation, the aluminum alloy slotted fins with high heat exchange capacity are used to fully expand the heat exchange area, so that the hot blast stove forms a heat dissipation structure with strong heat exchange capacity. , greatly improve the heat energy utilization efficiency of tobacco leaf curing equipment, and achieve the purpose of saving energy and reducing consumption in flue-cured tobacco production.

Description

technical field [0001] The invention relates to the field of heat transfer, in particular to a high-efficiency hot air stove used for tobacco leaf curing equipment. Background technique [0002] Tobacco leaf curing is a drying operation that consumes a lot of energy. A large part of the cost of tobacco leaf curing comes from energy consumption. The hot blast stove is an important part of tobacco leaf drying equipment, and it plays the role of heat energy conversion in tobacco leaf drying equipment. The heat transfer performance of the hot blast furnace directly affects the energy consumption of tobacco leaf curing equipment and the cost of flue-cured tobacco. Seeking high-efficiency and low-energy consumption tobacco leaf curing equipment has always been the direction and goal of tobacco leaf curing equipment development. [0003] In recent years, based on the application of coal-fired fire-tube hot air stoves in the field of domestic tobacco leaf curing, heating equipment s...

AI Technical Summary

Problems solved by technology

[0004] However, the coal-fired fire-tube hot-blast stoves that are widely used in tobacco-intensive barns currently have the problem of generally low heat energy utilization efficiency and high energy consumption for flue-cured tobacco.

The reasons: First, the heat transfer coefficient of the gas-gas heat exchange method is inherently low, and the fire-tube hot blast stove is limited by the thermal conductivity of the metal, resulting in large thermal resistance and low heat conversion efficiency

The second is that the capacity of the furnace does not match the three-stage flue-cured tobacco process. In the low-fire period and medium-fire period, the fuel in the furnace is not fully burned, the combustion efficiency is low, and volatiles and combustibles are discharged outwards, and fine particles of fuel are released from the grate gap. Leakage causes waste

The third is that the fire tube heat exchanger is limited by the structural volume, the heat dissipation area is small, the heat dissipation capacity is limited, and the flue gas discharge temperature is high

The fourth is that the heat exchange tubes of the fire tube heat exchanger are easily blocked by dust, which increases the thermal resistance of the heat exchange tubes and reduces the heat exchange capacity to varying degrees. When the dust blockage is serious, some heat exchange tubes may even fail.

Due to the constraints of various factors that affect the heat exchange performance of the hot blast stove, the efficiency of heat energy utilization is generally low, and the energy consumption of flue-cured tobacco remains high.

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