Device and method for delivering steam onto and beneath a field surface

A multi-generator powered steam sprayer for delivering organic steam onto and beneath an approximately planar field surface, said steam sprayer comprising:

• a. a rigid support frame for attachment to a powered vehicle, said rigid support frame defining a spray width approximately perpendicular to the working direction of travel of the vehicle;
• b. a plurality of steam generators each configured to generate and provide steam;
• c. a pressurized water heating tank fluidly connected to each of said steam generators to provide heated water at a substantially constant pressure;
• d. a water storage tank and a connected water pump to provide water to the water heating tank;
• e. a power source operable to provide power to the water heating tank and each of the steam generators;
• f. a plurality of steam spraying nozzles each fluidly connected to a respective one of the steam generators and rigidly mounted to the support frame in a spaced apart pattern, each of said steam spraying nozzles being oriented substantially downwardly for spraying steam onto and beneath the field surface within the spray width and being operatively connected to the respective steam generator to receive a corresponding constant stream of steam therefrom;
• and
• g. a powered height adjusting mechanism mounted to the support frame to vertically shift the support frame and adjust the distance between the field surface and the steam spraying nozzles;
• whereby in operation the plurality of steam spraying nozzles will spray steam approximately across the entire spray width while the steam sprayer is moved across the field surface;
• and
• wherein the steam pressure of all of the spray nozzles across the spray width of the support frame is approximately consistent.