ZEEP Technology

Zero Emission Energy Plants, Inc. (ZEEP) recognizes, along with many others in the industry, that new technology is required to address the numerous energy issues facing the world today. There is a tremendous need to produce not only more energy, but do it in a way that is both environmentally friendly and cost effective. ZEEP is dedicated to securing the best available technology to help meet these needs.

The ZEEP leadership team has been working independently in the energy industry for many years and we firmly believe that gasification is the best process for solving these energy issues. Through an extensive evaluation of the possible options, ZEEP has partnered with Pratt & Whitney Rocketdyne (PWR) to commercialize their gasification technology. In addition to PWR, ZEEP will be establishing relationships with other technology partners in key areas such as gas turbines, compressors, etc… These leading technology partners will allow ZEEP to fulfill its commitment to construct and operate multiple Energy Centers throughout the world. ZEEP will use PWR gasification technology as the core technology at the heart of these Energy Centers.

The following is a detailed description of the PWR Gasification technology.

PWR Gasification System Description

The PWR Compact Gasification System is an ultra dense solids feed system coupled with an oxygen-blown, single stage gasifier that converts low value carbonaceous feedstock into a syngas that is primarily carbon monoxide and hydrogen. Shown below is the integrated gasification system to be provided by PWR. The gasification system consists of a low pressure solids hopper, which feeds the carbonaceous material to the Dry Solids Pump at atmospheric conditions. In a single stage, the Dry Solids Pump transfers the feed stock into the high pressure feed tank at a nominal pressure of 1200 psi. By controlling the differential pressure between the high pressure feed tank and the gasifier that operates at 1000 psi, the material flows through a static flow splitter to distribute the solids to the gasifier’s multiple burner ports. The solids feed stock is reacted in the gasifier with oxygen and steam to generate syngas; then partially water quenched to reduce the syngas temperature. The syngas flows through commercially available solids cyclones and a candle filters to remove any particulate material. The syngas is then processed to generate electricity or to produce chemicals, liquid fuels, or hydrogen.

ZEEP Technology through PWR

The gasifier system is capable of processing feedstocks such as coal, petcoke, refinery residues and biomass into a value added syngas. The Compact Gasification System is being developed specifically to compete against existing commercial gasification systems to provide increased operating availability and efficiency, and reduced plant capital and operating costs.

Gasifier

The PWR gasifier operates at 1000 psig, and when combined with the multi-port burner, reduces gasifier size by 90% when compared to competing systems. The gasifier dimensions are approximately 40 inches internal diameter, and 40 feet in length from the feed splitter to the exit of the quench section. The gasifier consists of three sections: 1) gasifier burner head, 2) the gasifier reactor body with the water cooled liner, and 3) the quench section. The relatively small gasifier diameter is achieved with active wall cooling using water cooled metal liners configured to establish and retain a frozen slag layer that protects the liner during gasifier operation. This concept is similar to designs used in commercial gasifiers that are currently marketed and operated around the world.

Dry Solids Pump

Each train of the PWR gasification system is capable of processing up to 3,000 tons of hydrocarbon based feedstock per day. This system consists of a dry solids pump and ultra dense solids feed system for delivering high-pressure (>1200 psi) pulverized solids to the gasifier. The dry solids pump is being developed by Pratt & Whitney Rocketdyne. The innovative pump design uses a motorized tractor belt (metal links) to compress and transport the solids feed stock in a single stage process and delivers it into the high pressure feed tank. All the materials of construction, motors, and gear reduction assemblies are commercially available and do not require extensive development.

High Density Feed System and Flow Splitter