Minimization of malodorous gas release for a cellulose pulp...

Details Minimization of malodorous gas release for a cellulose pulp... Minimization of malodorous gas release for a cellulose pulp...

D - Textiles, Paper

21

C

D21C 11/06 (2006.01) D21C 7/06 (2006.01)

Patent

CA 2297222

The release of malodorous TRS-containing gases from a comminuted cellulosic fibrous material feed system for a digester is minimized utilizing a particular arrangement associated with a pressure isolation device. Material is fed through the pressure isolation device and the pressure of the material increases from the inlet to the outlet, and the material is discharged from the pressure isolation device into a treatment vessel, such as a horizontal steaming vessel. Malodorous gases from the pressure isolation device are discharged substantially independently of the material discharged from the isolation device, and at least some of the malodorous gases discharged from the pressure isolation device are pressurized (e.g. in an eductor or thermocompressor) and reintroduced into the flow of cellulosic material downstream of the pressure isolation device (for example into the horizontal steaming vessel or a vessel downstream of it). In the horizontal steaming vessel the gases can be removed from a top portion thereof and fed to an NCG system associated with the pulp mill.

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