Gasification

US GREEN INFRASTRUCTURE SOLUTIONS

THE ORC | PELLETS TO SYNGAS

The Gasification Process

The USGIS gasification system has been designed to efficiently convert fully processed MSW pellets to Syngas. A gasifier is a large heat reactor used to convert biomass into Syngas (similar in structure to natural gas). The USGIS | Zero gasifier serves two purposes. First, the gasifier is used to remove all moisture from the waste as it is ingested into the system, and this moisture is then converted to safe and clear drinking water to be used at a later time.

OPERATION

Gasification processes involve the reaction of MSW feed pellets with an oxygen-containing reagent, in this case, steam. The process is largely exothermic, but heat is added to aid in keeping the gasifiers at optimal temperatures.

EFFICIENCY AND USAGE

The gasifier system has been designed to process a variable amount of MSW depending on the current load. A sophisticated control system is in place to ensure that all gasifiers have adequate pellet feed.

TOWER VIEW 1

The gasification system is placed externally from the main USGIS | Zero building. This both reduces the overall footprint of the plant, while also greatly reducing risk. The gasification system is designed as a major source of heat transfer throughout the plant.







TOWER VIEW 2

Gasifiers must be serviced at regular intervals to ensure optimal performance. This includes inspection of the components, as well as cleaning of tar and ash from the gasifiers. During this process, the master control system will take the component to be serviced offline, which will divert flow to other gasifiers. Additionally, the gasifier will be mechanically taken offline to minimize safety risks. All servicing procedures will be easily accessible by the access system structure and will be in accordance with all regulations.





GASIFIER OPERATION

Gasification processes involve the reaction of MSW feed pellets with an oxygen-containing reagent, in this case, steam. This reaction occurs at temperatures around 1200 degrees.

PELLETS

This process involves the partial oxidation of a substance which implies that oxygen is added but the amounts are not sufficient to allow the fuel to be completely oxidized and combustion to occur.

SYNGAS FROM PELLETS

This process is largely exothermic, but heat is added to aid in keeping the gasifiers at optimal temperatures to avoid incineration and allow the particulates to convert to a gasious form.

SYNGAS TO ELECTRICITY

The other main product produced by gasification is a solid residue of non-combustible materials (ash) which contains a relatively low level of carbon. The syngas can then be used to generate electricity, while the ash can be safely stored.

MAINTENANCE AND SERVICE

During this process, The gasifier will be mechanically taken offline to minimize safety risks. All servicing procedures will be easily accessible by the access system structure and will be in accordance with all regulations.

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