The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1991
Filed:
Sep. 27, 1990
Thomas S Dewitz, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
A process for the partial combustion of finely divided coal at high temperature and pressures to make synthesis gas having entrained particles of fly ash which are separated from the gas at high pressure. The fly ash and a minor amount of entrained gas are handled in a batchwise manner to isolate a batch in a lock hopper, depressurize the batch, strip the synthesis gas from the fly ash and cool the fly ash prior to disposal. During the depressurizing steps, the kinetic energy represented by fluids flowing from the pressurized lock hopper is utilized to provide power to a pressure recovery means and do additional work. The additional work is used to aid in the pressurization of a second lock hopper. In an alternate embodiment the additional work may be used to aid in fluidizing the particulate coal flow to the burners of the gasifier.