Abstract:
A surgical procedure for revascularization the myocardium, comprising the steps of: directing a generally cylindrically shaped first nozzle into a heart wall being treated; forming a first or main channel in the heart wall from the ventricle into the myocardium of the heart by the nozzle; removing a generally cylindrically shaped tissue core through the nozzle, from the heart wall during formation of the first or main channel. A set of tributary channels may be made in the heart wall from and in communication with the main channel by an arrangement of radially directed fluid jets subsequent to the creation of that main channel.
Abstract:
Provided herein are systems, methods and equipment that include Integrated Gasification Combined-Cycle technology to retrofit existing plants, that include, e.g., subsystems for separating char fines from syngas after it emerges from an internally-circulating fluidized bed carbonizer and injecting the char into the carbonizer draft tube as a fuel source. Efficiency and power generation are thus increased to the extent that inclusion of carbon capture systems are now possible for existing coal plants in order to significantly reduce carbon dioxide emissions.
Abstract:
An exemplary adiabatic calcium looping system includes a first fixed-bed reactor having a fixed sorbent bed holding a calcium-based sorbent, and a second fixed-bed reactor having a fixed sorbent bed holding a calcium-based sorbent. The exemplary system includes valve mechanisms for alternately configuring each of the first and second reactors in a carbonator configuration and a calciner configuration. The first reactor is configured in the carbonator configuration when the second reactor is configured in the calciner configuration, and the first reactor is configured in the calciner configuration when the second reactor is configured in the carbonator configuration.
Abstract:
Provided herein are systems, methods and equipment that include Integrated Gasification Combined-Cycle technology to retrofit existing plants, that include, e.g., subsystems for separating char fines from syngas after it emerges from an internally-circulating fluidized bed carbonizer and injecting the char into the carbonizer draft tube as a fuel source. Efficiency and power generation are thus increased to the extent that inclusion of carbon capture systems are now possible for existing coal plants in order to significantly reduce carbon dioxide emissions.
Abstract:
The invention provides a hybrid integrated gasification combined cycle (IGCC) plant for carbon dioxide emission reduction and increased efficiency where the syngas is maintained as a temperature above a tar condensation temperature of a volatile matter in the syngas. The invention also provides methods and equipment for retrofitting existing IGCC plants to reduce carbon dioxide emissions, increase efficiency, reduce equipment size and/or decrease the use of water, coal or other resources.
Abstract:
The invention provides a hybrid integrated gasification combined cycle (IGCC) plant for carbon dioxide emission reduction and increased efficiency including an internally- circulating fluidized bed carbonizer that forms a syngas and char. The invention also provides methods and equipment for retrofitting existing IGCC plants to reduce carbon dioxide emissions, increase efficiency, reduce equipment size and/or decrease the use of water, coal or other resources.
Abstract:
A rotary valve including a rotor assembly rotatable by a driver to cause material to be transferred from an inlet side to an outlet side of the rotary valve. The rotor assembly includes a rotor coupled to a shaft which rotates about an axis when driven by the driver. The rotor includes an outer tube, an inner tube, and a plurality of radial blades. The rotary valve includes a casing assembly for supporting the rotor assembly that includes an inlet for allowing the material to enter pockets of the rotor assembly and an outlet for allowing the material to exit the rotor assembly. The casing assembly includes an upper cap disposed at a top of the casing assembly that contains an opening for allowing the material to enter the pockets of the rotor assembly, a shaft opening, and a wiper assembly that removes material from the tops of the blades as the blades pass by the inlet opening. The rotary valve also includes a plurality of springs coupling a lower cap to the sleeve that serve to compress the rotor between the caps. The rotary valve includes a bearing assembly for rotatably supporting the rotor inside the casing assembly. The bearing assembly includes an upper bearing which separates the upper cap from the top of the rotor by a minimum gap, a lower bearing which separates the lower cap from the bottom of the rotor by a minimum gap, and bearing grooves in which the bearings are disposed.
Abstract:
A mechanism for the prevention of distributor plate pluggage by dust-laden gases in multistage fluidized-beds is disclosed. Slanted tubes are used to control the flow of gases into a fluidized bed, where the angle between the slanted tube and the distributor plate is less than the angle of repose of the bed solids.
Abstract:
An enclosed-rotor vertical-shaft rotary valve is used as an airlock to inject abrasive, fine, or sticky solids into pressurized air. The invention eliminates the effect of thermal expansion on the gap between the rotor and casing, thereby making it possible to obtain much smaller gaps than before. The smallness of the gaps makes it feasible to pump clean air into the gaps without interfering with the performance of the airlock. The clean air keeps dust-laden air from entering the gaps, which eliminates the erosion that has limited the usefulness of conventional rotary valves when handling abrasive powders. By the use of two vents and a dual-pressure purge-air system, the invention also greatly reduces the blowby of air into the entrance of the airlock, which has limited the usefulness of conventional rotary valves when handling very-small-particle powders. These benefits also accrue to the injection of sticky solids into pressurized fluids. The invention extends the pressure and temperature capability of airlocks, so they may be used to inject solids into fluids at lower instead of higher pressure and so they may be used with fluids other than air.