Characteristics of fire tube boiler

"Steel Tiger": There is a large-diameter boiler shell, so the large-diameter boiler shell consumes a lot of metal, resulting in limited pressure-bearing capacity of the boiler. The combustion chamber with limited steam parameters is arranged in the boiler shell, which is internal combustion type, and the combustion space is limited, so it is difficult to increase fuel consumption and evaporation. "coal tiger": low efficiency, furnace lining surrounded by water, it is difficult to raise the furnace temperature, which is not conducive to combustion; Flue gas longitudinal washing has poor heat transfer, high exhaust temperature, large water capacity and slow start-up. Dust is easy to accumulate in the flue, and dirt outside the flue is difficult to remove. The evaporation intensity is not high, resulting in low steam pressure. Boiler shell and internal components are directly heated, and the working conditions are poor. Safety problem: the boiler shell is weakened by various openings, and due to a large amount of water storage and accumulation, once it is destroyed, it will release more energy. The boiler with evaporation heating surface mainly arranged in the drum is called shell boiler, also known as fire tube boiler. Features: Flue gas flows in the pipe, while soda water flows outside the pipe.