Boiler shell middle sectional type sulfur acid producing fire-tube boiler with superheater

Abstract

The invention relates to the technical field of sulfur acid production, in particular to a boiler shell middle sectional type sulfur acid producing fire-tube boiler with a superheater. The boiler shell middle sectional type sulfur acid producing fire-tube boiler with the superheater comprises a steam drum, the superheater, a boiler shell, an inlet smoke box and an outlet smoke box. The boiler shell middle sectional type sulfur acid producing fire-tube boiler with the superheater is characterized in that the boiler shell comprises a high-temperature boiler shell section and a low-temperature boiler shell section, one end of the inlet smoke box is connected with one end of the high-temperature boiler shell section, the other end of the high-temperature boiler shell section is connected with one end of the superheater, the other end of the superheater is connected with one end of the low-temperature boiler shell section, the other end of the lower-temperature boiler shell section is connected with one end of the outlet smoke box, and the steam drum is arranged above the high-temperature boiler shell section. Compared with the prior art, the boiler shell is divided into the two sections, and the superheater is arranged between the two sections of the boiler shell. The superheater is arranged in front of the low-temperature boiler shell, and thus the heat transmission temperature difference of the steam side and the smoke side of the superheater is improved greatly; the superheater is arranged behind the high-temperature boiler shell, the working temperature of the superheater is reduced greatly, and the safety of the superheater is improved.

Description

technical field [0001] The invention relates to the technical field of sulfuric acid production, in particular to a boiler shell intermediate section type fire tube boiler with superheater for sulfuric acid production. Background technique [0002] At present, the fire tube boilers used in sulfuric acid production plants, whether it is low pressure or medium pressure, produce saturated steam. The boiler is usually composed of upper drum, lower drum, inlet smoke box, outlet smoke box and piping system within the scope of the boiler. The upper drum is a steam drum, the lower drum is a shell, and the smoke pipes are fixed on the tube plates at the front and rear ends of the lower drum. The high-temperature flue gas is divided by the inlet smoke box, passes through the smoke pipe longitudinally, and is confluent and led out in the outlet smoke box. [0003] The traditional design makes the heat transfer temperature difference between the steam side and the flue gas side of the...

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Problems solved by technology

[0003] The traditional design makes the heat transfer temperature difference between the steam side and the flue gas side of the superheater larger, and increases the heat transfer area of ​​the superheater, which requires a high working temperature for the superheater. The security of the system is also greatly reduced, and there are certain security risks

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