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Performance of dry desulfurization

Gas fired boiler dry desulfurization project of Weifang special steel

Release time: April 13, 2020 | Focus on: eight hundred and ninety-five

Application scope of sodium based dry desulfurization:

Gas fired boiler, hot blast stove, coking furnace tail gas treatment in iron and steel industry, suitable for sulfur content less than one thousand mg/Nm³ The best reaction flue gas temperature is two hundred About ℃.

Process characteristics

one The process is simple, one-time investment is less, the operation cost is low, the floor area is small, the operation and maintenance is simple, and the full dry treatment can effectively avoid the production of large white smoke from the chimney.

two The catalyst of denitration system is modularized to facilitate catalyst replacement. The denitration reactor is composed of several independent units, which can be used for on-line maintenance of equipment or catalyst replacement. Single unit maintenance is designed, which does not affect the normal operation of other units.

3、 The content of SO3 in flue gas is very low, and the oxidation rate of SO2 by denitration catalyst is less than 0.5%. So 3 content in flue gas after denitration catalyst is also very low. The flue gas temperature of the whole process is always far higher than the water dew point temperature and acid dew point temperature, so the flue gas temperature after purification will not be lower than the acid dew point, which will cause corrosion phenomenon, and will not generate acid rain around the chimney.

4、 The temperature drop of desulfurization and denitrification system is small, which is about 20 ℃, which does not affect the subsequent process flow of waste heat boiler.

Working conditions of gas fired boiler of Shandong Weifang Special Steel Group Co., Ltd

Outlet flue gas temperature: ≥ 150 ℃

SO2 content: 300mg / Nm3

NOx content: 230mg / Nm3 (maximum value, usually less than 50mg / Nm3)

Particulate matter content: 5mg / Nm3

Bag filter area: 17000 M2 (single set)

Outlet SO2 content: 35mg / n

Outlet particulate matter content: 5mg / Nm3

 
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