Patent ID: 9709266
Date: 2017-07-18
CPC Classifications: F23D,F23G

Claim:
1. A combustor for combustion of low pressure and high pressure hydrocarbon vapors comprising: a substantially vertically extending stack having a single diameter, a cylindrical wall and an enclosed bore extending therethrough, the stack having a height sufficient to at least minimize radiant energy at a ground surface; a primary burner positioned in the bore adjacent a base of the stack, a primary combustion zone being formed thereabove; a primary pilot operatively connected to the primary burner for ignition of the primary burner; a low pressure vapor line operatively and fluidly connected from a low pressure source to the primary burner for supplying low pressure vapors at a pressure up to 15 psi and at a first flow rate thereto; a flare positioned in the bore adjacent a top of the stack and oriented upwardly for forming a secondary combustion zone thereabove, at least a portion of the secondary combustion zone extending above the stack; a flare igniter adjacent the flare for ignition of the flare; a high pressure vapor line extending along the stack for entering the bore at the top of the stack for periodically supplying high pressure vapors from a high pressure source to the flare at pressures greater than 15 psi and at a second flow rate at least 20 times greater than the first flow rate to the primary burner, for combusting in the second combustion zone thereabove; one or more air openings extending through the wall of the stack adjacent the base of the stack and below the primary burner for supplying primary and secondary combustion air to the primary burner and primary combustion air to the flare, the primary and B secondary air being inducted through the air openings.