Countercurrent multistage rotating heat pipe hot blast stove

Abstract

The invention discloses a countercurrent multistage rotating heat pipe hot blast stove. The countercurrent multistage rotating heat pipe hot blast stove which is composed of a cold air inlet, a hot air outlet, a high-temperature smoke inlet, a smoke outlet, a transmission device, a riding wheel device, a heat holding cover and heat exchanging cylinders. The multistage heat exchanging cylinders are composed of at least one rotating heat exchanging cylinder and one or more static heat exchanging cylinders. A smoke channel enables the rotating heat exchanging cylinder and the static heat exchanging cylinders to be connected in series, so that a multistage heat exchanging system is formed. Cold air and hot smoke conduct heat exchange stage by stage, so that the number of the procedures of heat exchange is increased and the time of heat exchange is prolonged. The rotating hot air cylinder enables heated airflow to form turbulent flow when the heated airflow passes through heat pipes, so that the number of the procedures of heat exchange is further increased and the time of heat exchange is further prolonged. Therefore, heat exchange is more sufficient, the heat exchange efficiency is improved, heat loss is reduced, energy consumption is reduced, the structure is simple, cost is low, and popularization and application are convenient.

Description

technical field [0001] The invention relates to a hot air blower, in particular to a countercurrent multistage rotary heat pipe hot blast stove. Background technique [0002] As a kind of thermal power machinery, hot blast stoves have been widely used in drying or heating equipment in China. Hot blast stoves are generally divided into direct hot blast stoves and indirect hot blast stoves; direct hot blast stoves are hot smoke formed by direct combustion of fuel. Gas, after a certain purification process, directly contacts with the material to heat and dry the material. This kind of hot blast stove directly uses the hot flue gas formed by combustion to dry or dry the material. Compared with the indirect hot blast stove, it does not need to go through Secondary heat exchange, therefore, the thermal efficiency is higher than that of the indirect hot blast stove. However, due to the large amount of soot impurities in the hot flue gas formed by combustion, it is not suitable for ...

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Problems solved by technology

[0002] As a kind of thermal power machinery, hot blast stoves have been widely used in drying or heating equipment in China. Hot blast stoves are generally divided into direct hot blast stoves and indirect hot blast stoves; direct hot blast stoves are hot smoke formed by direct combustion of fuel. Gas, after a certain purification process, directly contacts with the material to heat and dry the material. This kind of hot blast stove directly uses the hot flue gas formed by combustion to dry or dry the material. Compared with the indirect hot blast stove, it does not need to go through Secondary heat exchange, therefore, the thermal efficiency is higher than that of the indirect hot blast stove. However, due to the large amount of soot impurities in the hot flue gas formed by combustion, it is not suitable for drying with high product quality requirements; the indirect hot blast stove is mainly used in The material to be dried is not allowed to be polluted or applied to the drying of heat-sensitive materials with low temperature, such as food, medicine, fine chemical products and synthetic resins, as well as some products with high purity requirements. Air, steam, etc. are used as carriers, and the air is heated through various forms of heat exchangers to make the air reach the temperature required for drying, and then the materials are dried with hot air. It can be seen that the effect of the indirect hot blast stove depends on Based on the heat exchange effect of the heat exchanger, theoretically speaking, the larger the heat exchange area and the longer the heat exchange time, the higher the heat exchange efficiency, and the better the thermal efficiency and energy saving effect of the hot blast stove; at present, the indirect hot blast stove Tube heat exchangers are mostly used, that is, heat pipe hot blast stoves. The existing heat pipe hot blast stoves, whether they are heat pipes arranged in parallel or arranged in other forms, are all static designs. The heat pipes are designed above the furnace, and the heat pipes The distribution is dense, the space is relatively small, the cold air flows through the heat pipe too smoothly, without disturbance, so that the heat exchange process is short, the time is short, the heat exchange is insufficient, the energy loss of the flue heat pipe is large, and the temperature of the flue gas at the outlet of the exhaust port is high , so there are common problems of low thermal efficiency, high energy consumption, and serious energy waste

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