Basic structure and working principle of coal-fired hot blast stove

The coal-fired hot blast stove is not only an auxiliary equipment for drying equipment such as airflow drying and tower drying, but also one of the important equipments in the ironmaking production process, and also the main heating equipment for the agriculture and animal husbandry greenhouse. When the greenhouse is heated by hot air of a hot blast stove, the main purpose is to obtain an ambient temperature suitable for the growth of plants and animals. The performance of coal-fired hot blast stove directly affects the control of ambient temperature. Therefore, it is important to design and calculate the structure and related parameters of the hot blast stove.

Basic structure and working principle:

A coal-fired hot blast stove is a cold-air heating device sent by a blower, but it is different from a normal heat exchanger. Conventional heat exchangers only involve the transfer of cold fluids and hot fluids, while coal-fired hot stoves involve the combustion of fuel and the heat exchange between combustion heat and air. Because the hot blast stove used in the greenhouse of agriculture and animal husbandry not only needs to reach a suitable ambient temperature, but also to clean the air in the greenhouse, the hot blast stove is mainly used for the needs of small users, so the indirect coal-fired heating selects the furnace body and the heat exchanger as One-piece casing structure. The coal-fired indirect heating sleeve hot-air stove is mainly composed of a heat exchanger, a flue, a hot air duct and the like.

The coal-fired hot blast stove adopts a vertical structure, the flue and the hot air duct are located at the top of the furnace, and the heat exchanger is the main structure of the hot blast stove, and adopts a full-plate double-layer structure. In order to reduce the volume of the heat exchanger and increase the heat exchange area, heat sinks are welded on the side walls of the steel inner cylinder. The working principle of the hot blast stove is that the coal is burned in the furnace, and the high-temperature flue gas directly enters the heat exchanger, and the heat exchange is performed by the fan and the cold air entering the interlayer of the coaxial steel cylinder wall. After the heat is transferred by the flue gas, the clean hot air is discharged through the flue gas, and is supplied by the hot air outlet pipe for heating.