Hot blast stove adopts reciprocating grate, which is the most suitable combustion equipment for biomass fuel combustion. In the structure design of hot blast stove, compared with the traditional hot blast stove, the furnace has larger space and reasonable secondary air arrangement, which is conducive to the full combustion of a large amount of volatile matter released in the instant of biomass fuel combustion. Hot blast stove can be equipped with fuel (gas) ignition burner to realize ignition automation. The feeding, combustion, slag removal, water supply and ignition of hot blast stove can be controlled automatically, and the operation is very convenient. Hot blast stove is equipped with automatic ash cleaning device, which can remove the ash deposited on the heating surface of hot blast stove in time and ensure the efficient and stable operation of hot blast stove. The tail of hot blast stove is equipped with economizer or air preheater according to user's needs. Compared with traditional hot stove, hot stove has higher efficiency and lower exhaust temperature.
The surface temperature of hot blast stove is low and the heat dissipation loss can be neglected by using high efficiency heat preservation material. Strictly in accordance with China's national norms and standards, all pressurized components are made of high-quality hot-blast stove steel. Every hot blast stove has to undergo strict inspection and testing before leaving the factory, including water pressure test and X-ray test. Manhole, inspection door and fire-watching hole are set up, so maintenance is very convenient. The biggest characteristics of biomass hot stove are energy saving, environmental protection, and easy installation and use. 燃料供应
The fuel of hot blast stove is BMF fuel. The fuel is fed into the top bin by the feeder, and then into the furnace by the screw feeder, evenly scattered on the grate.
The fuel is fed into the furnace by the screw feeder, where it is gradually preheated, dried, ignited and burned due to the action of high temperature flue gas and primary air. During this process, a large amount of volatile matter is precipitated and burned intensely. After the high temperature flue gas washes out the main heating surface of the hot blast stove, it enters the economizer and air preheater of the heating surface at the tail of the hot blast stove, then enters the dust collector, and finally discharges into the atmosphere through the chimney. The non-gasified fuel moves towards the back of the grate until it burns out. Finally, a small amount of residue falls into the slag removal port behind the grate.
Environmental protection emission
The ash produced by BMF combustion accounts for about 1.5% of the fuel. In order to facilitate ash removal, a screw slag discharger is arranged at the back of the hot blast stove to realize continuous ash removal. A dust collector is arranged in the tail flue of the hot blast stove to ensure that the dust discharge meets the requirements of environmental protection.
Efficiency of hot blast stove
The efficiency of biomass hot-blast stove is generally more than 80%. The type of hot-blast stove is large, the combustion is more full, and the efficiency of hot-blast stove is higher. The highest is 88.3%, which is 15% higher than the average efficiency of coal-fired hot blast stove.
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