Multi-tube high-temperature hot blast stove with heart-shaped heat exchange tubes

Abstract

A multi-tube high-temperature hot blast stove with heart-shaped heat exchange tubes comprises a stove body, a combustion chamber, a dust chamber and a heat exchange chamber, wherein the combustion chamber, the dust chamber and the heat exchange chamber are formed in the stove body; an air inlet and an air outlet are formed in the two sides of the stove body respectively. An air inlet chamber is formed in the upper end of the air outlet. An interlayer space is formed between the stove body and the heat exchange chamber. The interlayer space is a waste heat return airway. One end of the waste heat return airway is communicated with the air inlet. The other end of the waste heat return airway is communicated with the air inlet chamber. The multiple heart-shaped heat exchange tubes which horizontally penetrate through the heat exchange chamber are arranged inside the heat exchange chamber. The tips of the heat shapes of the heart-shaped heat exchange tubes face downwards. The two inclined edges of each heat shape are heated surfaces. A plurality of baffles are vertically and axially arranged inside the heat exchange chamber. An air chamber communicated with the heat exchange tubes is formed in the side face of the heat exchange chamber. The heat exchange tubes in the upper half of the heat exchange chamber are communicated with the air inlet chamber. The heat exchange tubes in the lower half of the heat exchange chamber are communicated with the air outlet. A flue gas inlet cavity and a flue gas outlet cavity are formed above the heat exchange chamber. The flue gas inlet cavity is communicated with the air chamber. The flue gas inlet cavity is connected with the flue gas outlet cavity through a plurality of horizontally arranged hot air tubes. The flue gas outlet cavity is connected with an exhaust pipe.

Description

technical field [0001] The invention relates to a biomass fuel hot blast stove, in particular to a multi-tube high-temperature hot blast stove adopting heart-shaped heat exchange tubes, which belongs to the technical field of heat exchange. Background technique [0002] As a thermal power machine, the hot blast stove began to be widely used in my country in the late 1970s. It has become a replacement product for electric heat sources and traditional steam power heat sources in many industries. Through long-term production practice, people have realized that only by using hot air as the medium and carrier can the heat utilization rate and thermal work effect be greatly improved. However, the traditional hot blast stoves on the market adopt the sinking combustion method, the ancient combustion method of blowing air from the bottom of the grate structure, and the combustion rate of the fuel is extremely low, resulting in a large amount of energy waste and air pollution; In thi...

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Problems solved by technology

However, the traditional hot blast stoves on the market adopt the sinking combustion method, the ancient combustion method of blowing air from the bottom of the grate structure, and the combustion rate of the fuel is extremely low, resulting in a large amount of energy waste and air pollution; In this way, the heating surface is very small, and a large amount of heat energy is discharged into the air with the flue gas before it can be converted, resulting in a large amount of heat energy loss and waste.

[0003] Although the barrel heating method has been changed to the tube heating method in the market recently, as far as the heating area of ​​the circular tube facing the fire is concerned, the heating area is less than 50% of the outer circular surface area, which has not yet reached the maximum.

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