초록 ▼

Carbonaceous solids such as coal and oil shale are fed to a high temperature processing vessel without bridging and plugging problems interrupting the flow of the solids into the processing vessel by passing the solids at a controlled rate from a feed vessel into a first conduit communicating with t

Carbonaceous solids such as coal and oil shale are fed to a high temperature processing vessel without bridging and plugging problems interrupting the flow of the solids into the processing vessel by passing the solids at a controlled rate from a feed vessel into a first conduit communicating with the feed vessel. The solids are then passed through the first conduit into a second conduit which communicates with the first conduit and the processing vessel, and which contains a scraper for scraping the inside walls of the conduit. The pressure in the feed vessel is maintained at a level higher than that in the processing vessel by passing a sufficient amount of a gas into the feed vessel such that the solids are passed through the second conduit into the processing vessel in dense phase pneumatic flow as the scraper scrapes the inside walls of the second conduit thereby preventing any bridging or plugging from occurring. Normally, the scraper will consist of a wire helix which is rotated inside the second conduit.

대표청구항 ▼

A process for feeding carbonaceous solids which tend to agglomerate and/or swell at elevated temperatures to a processing vessel which comprises: (a) passing said carbonaceous solids at a controlled rate from a feed vessel into a first conduit communicating with said feed vessel; (b) passing said ca

A process for feeding carbonaceous solids which tend to agglomerate and/or swell at elevated temperatures to a processing vessel which comprises: (a) passing said carbonaceous solids at a controlled rate from a feed vessel into a first conduit communicating with said feed vessel; (b) passing said carbonaceous solids through said first conduit into a second conduit communicating with said first conduit and with said processing vessel, said second conduit containing means for scraping the inside walls of said conduit; and (c) maintaining the pressure in said feed vessel at a value greater than the pressure in said processing vessel by introducing a sufficient amount of a gas into said feed vessel such that said carbonaceous solids pass in dense phase pneumatic flow through said second conduit into said processing vessel as said scraping means scrapes the inside walls of said second conduit.