Selection of superheaters for sulfuric acid production
Thread Content
The saturated steam from the waste heat boiler in sulfuric acid production is superheated in a superheater before being fed into a turbine to generate electricity or drive a turbofan. However, if the steam is supplied from outside, temperature and pressure control devices are still required. Question: (1) If the steam used in sulfuric acid production is mainly supplied from outside and no superheater is required, is it feasible to remove the superheater? (2) The problem after removing the superheater is what to do with the heat from the high-temperature flue gas at the exit of Section 1, and the temperature gradient throughout the conversion section must be recalculated. (3) I look forward to guidance from experienced technical professionals, or explanations of relevant cases.
60,000 tons of low-concentration sulfuric acid; a waste heat boiler is installed after the sulfur combustion furnace, a heat pipe boiler is placed at the outlet of stage 1, and another waste heat boiler is installed at the outlet of stage 4
Large-scale units are equipped with high, medium, and low-pressure superheaters as well as economizers. Without power generation, only temperature and pressure reduction can be used for control
If no power is generated, is it unnecessary to set values for high and low levels and then reduce temperature and pressure?
It is mainly necessary for heat recovery and to stabilize the process parameters; of course, heat pipe boilers can also be installed to produce low-pressure steam
It’s possible to drive the turbine fan without generating electricity; that way, the cost associated with operating the electric fan is saved. That’s how it works in our factory, and it’s also required by the manufacturing process.
If the sulfuric acid plant has already been designed, the superheater cannot be removed, otherwise the thermal balance will be disrupted. A back-pressure unit can be used, or a turbine can be employed to drive a fan or a feed water pump, with the waste steam generated after work being discharged externally. Specifically, it is about examining the requirements for externally supplied steam; reducing temperature and pressure is a form of waste.
Get a few more boilers. . . It seems that there is a sulfuric acid plant in Shanxi that produces caprolactam (designed by Tianchen), and its height has never been higher than that. . . Use several small boilers to combine the steam and send it out together