Year: 1977
Type: report
Abstract: The purpose of this project was to try to develop a continuous lump coal dry feeder for a pressurized fluidized bed combustor. The approach was to adapt the commercially available Fuller-Kinyon pump to feed coal against a pressure differential of 100 psi or more. The pump was modified and tests performed at various pressure differentials, with differently pitched screws, two screw rotational speeds, and various seal lengths and configurations. Successful operation of the modified Fuller-Kinyon pump was achieved for only relatively low pressure differentials. Although the results of this project are not conclusive, test data and observations were made that indicated to the contractor that higher pressure differentials could be attained by further modifications of the test set-up. Specifically, it is recommended that further testing be performed by replacing the 40-horsepower pump motor presently in the test set-up with a motor having a significantly higher power rating; adding a vent arrangement to the pump hopper to prevent aeration of the feed material in the hopper; and modifying the pump hopper to enhance feed material retention by the screw pick-up flights. It is also recommended that, if this further testing is successful, additional testing should be performed to determine the potential reduction in power requirements which might occur as a result of alterations in screw design and shortening of the pump barrel.
DOI: 10.2172/7111910
Author: S. F. Fields
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3018201754