Heat pipe hot blast furnace for tobacco baking equipment

Abstract

The invention provides a heat pipe hot blast stove for tobacco leaf curing equipment, comprising: a heat exchanger (1) and a coal-fired furnace (2); it is characterized in that the heat exchanger (1) is composed of heat pipes (3) and The pipe box (4) is formed, the evaporation section of the heat pipe (3) is arranged inside the box body of the pipe box (4), and the heat dissipation section of the heat pipe (3) is an open heat dissipation structure in an exposed state outside the pipe box (4); The heat-pipe hot-blast stove used in tobacco leaf curing equipment provided by the invention has high heat transfer efficiency, strong heat dissipation capacity, low operating cost and long service life; it can make full use of the high-efficiency heat transfer performance of the heat pipe and its structural characteristics, greatly increasing the heat dissipation area, Enhance the heat energy conversion capacity of the hot blast stove, without changing the frame structure of the original kang room, and meet the requirements of the tobacco leaf curing process, realize forced ventilation, hot air circulation and automatic control of the curing process, and greatly improve the heat energy utilization of the tobacco leaf curing equipment Efficiency, realize energy saving and consumption reduction in flue-cured tobacco production, reduce the cost of flue-cured tobacco, and increase the income of tobacco planting.

Description

technical field [0001] The invention relates to the field of heat transfer, in particular to a heat pipe hot air stove used for tobacco leaf curing equipment. Background technique [0002] Tobacco leaf curing is a high-energy-consuming drying operation, and a large part of its cost comes from energy consumption. The hot air stove is an important part of the tobacco leaf drying equipment. The performance of the hot air stove directly affects the energy consumption of the tobacco leaf drying equipment. and the cost of flue-cured tobacco, seeking high-efficiency and low-energy-consuming tobacco leaf curing equipment has always been the direction and goal of the development of tobacco leaf curing equipment. At present, domestic heating equipment used for tobacco leaf curing is roughly divided into three categories: one is heat pump heating equipment, the main problems of which are expensive equipment, large one-time investment, and high operating cost of power-consuming equipmen...

AI Technical Summary

Problems solved by technology

At present, domestic heating equipment used for tobacco leaf curing is roughly divided into three categories: one is heat pump heating equipment, the main problems of which are expensive equipment, large one-time investment, and high operating cost of power-consuming equipment. Economic considerations do not conform to the current national conditions in my country, and it is difficult to promote them in large areas; the other type is fuel oil and gas-based heating equipment. The fuel is burned and purified as a heat source. Its biggest weakness is that the fuel price is expensive and the cost of tobacco leaf curing is high; The other category is the fire tube coal-fired hot blast stove with the widest application range in the domestic smoke area and a large number of uses. Its fuel resources are abundant and the price is low.

However, the existing problem of this kind of hot blast stove is that the utilization efficiency of heat energy is generally low, and the energy consumption of tobacco leaf baking remains high.

The reasons: First, the fire-tube hot blast stove is limited by the thermal conductivity of metal, so the thermal resistance is large and the heat exchange efficiency is low.

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 will cause 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 horizontal arrangement of the heat exchange tubes of the fire tube heat exchanger is very easy to block dust, making the The thermal resistance of the heat exchange tube increases, and the heat exchange capacity decreases to varying degrees. When the ash clogging is serious, some heat exchange tubes may even fail; due to various factors affecting the heat exchange performance of the hot blast stove, the heat energy utilization efficiency is generally low, and the flue-cured tobacco energy is generally low. High consumption

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