Heat Recycling System for Use with a Gasifier

Abstract

The present invention provides a system that recycles heat recovered from hot products of a carbonaceous feedstock gasification process back into the gasification process. The hot gaseous products are used to heat working fluids such as air and water to produce hot air, hot water or steam. The heated fluids are used to return heat back to the gasification process. The system also comprises a control system to optimize the efficiency of a gasification process by minimizing energy consumption of the process, while also maximizing energy production.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims benefit of priority under 35 U.S.C. §119(e) from U.S. Provisional Application Ser. No. 60 / 746,612, filed May 5, 2006. This application also claims benefit of priority to International Patent Application No. PCT / CA2006 / 000881, filed Jun. 5, 2006. This application also claims benefit of priority under 35 U.S.C. §119(e) from U.S. Provisional Application Ser. No. 60 / 864,116, filed Nov. 2, 2006. This application also claims benefit of priority under 35 U.S.C. §119(e) from U.S. Provisional Application Ser. No. 60 / 911,179, filed Apr. 11, 2007. This application also claims benefit of priority under 35 U.S.C. §119(e) from U.S. Provisional Application Ser. No. 60 / 797,973, filed May 5, 2006. The contents of all of the aforementioned applications are hereby expressly incorporated by reference in their entirety and for all purposes.FIELD OF THE INVENTION [0002] This invention relates to the gasification of carbonaceous feedst...

AI Technical Summary

Benefits of technology

"This patent describes a system and process for improving the efficiency of gasifying carbonaceous feedstock by recycling heat from the gasification process and using it to preheat or pretreat the feedstock. The system includes a gas-to-fluid heat exchanger that transfers heat from a hot gas to a cool fluid, which is then used to provide heat for the gasification process. The system also includes a control system that monitors and adjusts operating parameters to optimize the gasification process and minimize energy consumption. The technical effects of this invention include improved energy efficiency and maximized energy production."

Problems solved by technology

It is becoming less desirable to dispose of waste material by incineration because of the extreme waste of fuel in the heating process and the further waste of disposing, as a residual waste, material that can be converted into a useful syngas and solid material.

The gas produced during the gasification of carbonaceous feedstock is usually very hot but may contain small amounts of unwanted compounds and requires further treatment to convert it into a useable product.

Prior systems and processes have not adequately addressed the problems that must be dealt with on a continuously changing basis.

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