Emission gas treatment method and emission gas treatment apparatus

A emission gas treatment method for recovering a recycle feed containing boron from emission gas discharged by a glass melting furnace for melting a boron-containing glass raw material, the emission gas treatment method comprising:

• a collection step of obtaining collected powder by collecting a component containing boron from the emission gas by a dry process;
• a mixing step of obtaining a collected powder-containing solution by mixing the collected powder in a solution;
• a separation step of separating the collected powder-containing solution into a solid and a liquid;
• a solution formation step of obtaining a boron solution by removing an impurity from an extracted liquid obtained in the separation step and supplying the boron solution as the solution in the mixing step;
• and
• a recovery step of recovering the recycle feed from an extracted solid obtained in the separation step.

A emission gas treatment apparatus for recovering a recycle feed containing boron from emission gas discharged by a glass melting furnace for melting a boron-containing glass raw material, the emission gas treatment apparatus comprising:

• collection means for collecting a component containing boron from the emission gas by a wet process to obtain a collected liquid;
• first separation means for separating the collected liquid into a solid and a liquid;
• solution formation means for forming a boron solution by removing an impurity from an extracted liquid obtained in the first separation means;
• a mixing tank for mixing an extracted solid obtained in the first separation means in the boron solution to form an extracted solid-containing solution;
• second separation means for separating the extracted solid-containing solution into a solid and a liquid;
• and
• recovery means for recovering the recycle feed from an extracted solid obtained in the second separation means.

A emission gas treatment apparatus for recovering a recycle feed containing boron from emission gas discharged by a glass melting furnace for melting a boron-containing glass raw material, the emission gas treatment apparatus comprising:

• collection means for collecting a component containing boron from the emission gas by a dry process to obtain collected powder;
• a mixing tank for mixing the collected powder in a solution to form a collected powder-containing solution;
• separation means for separating the collected powder-containing solution into a solid and a liquid;
• solution formation means for forming a boron solution by removing an impurity from an extracted liquid obtained in the separation means and supplying the boron solution as the solution in the mixing tank;
• and
• recovery means for recovering the recycle feed from an extracted solid obtained in the separation means.