In the ore-based sulfuric acid production process, is the single-rotation unit usually placed in front of the boiler or behind the boiler?
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In the ore-based sulfuric acid production process, is the single-rotation unit usually placed in front of the boiler or behind the boiler? It's still OK. If so, will the effect be different from the front to the back?
magnetized first； Good fluidity in front dust removal ； There are also latter ones. The boiler has a large ash load and is beneficial for heat recovery. ；
Generally, the single screw is at the back of the boiler. Our factory is like this but the best * Make a single spin on the front and rear of the furnace to clean the dust more effectively
Placing it at the back can reduce heat loss and increase steam production rate.
Reply 2# zxg.wylton Under normal circumstances, the single screw at the back of the boiler can increase the gas production of the boiler and improve the heat utilization rate.
I would like to ask my friends upstairs, how is the use of your whirlwind after placing the single whirlpool in the front? Thank you for your reply.
The single screw is placed in front of the boiler to reduce the amount of ash in the boiler and the washout of the boiler. The single screw is placed in the back of the boiler to increase the gas production of the boiler. The design parameters of the front and back are different. The gas speed in the front is slower and the gas speed in the back is higher.
Reply 7# min7711 My understanding is this, please give some advice from experts.
There are differences in the cyclone structures at the front and rear of the boiler. The interior of the boiler must be lined with refractory bricks due to the high operating temperature, and the material requirements for the ash discharge valve below are high and the valve life is limited. However, carbon steel or slightly higher grade alloy steel is generally used behind the furnace. Of course, placing it in the front is beneficial to the dust removal load of the boiler, but the heat loss increases, which is not conducive to heat recovery.
Our unit's pyrite acid-making cyclone is placed behind the waste heat boiler because the smoke in the flue gas contains a lot of heat, which can improve the waste heat recovery rate. The material selection of the cyclone is also looser, that is, some anti-scouring devices are installed in the boiler where the gas velocity is high to reduce the wear of the heat exchange tubes.
The dry spin in our factory is behind the boiler, so it’s okay!