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Western Division Office <br />' 211 Granite,Suite E•Corona,California 91719 <br /> (714)279-6210•Fax(714)279-6215 <br /> Ryax_Mrrphy, Ixcorporated CarpordteOffiae <br /> • '"The Good=Earth 8774 Yates Drive,Suite 100•Westminster,Colorado 8DO30 <br /> (303)4274567•Fax(306)427-1955 <br /> XIT VAROR EXTRACTION UNIT <br /> 1. 0 GENERAL DESCRIPTION <br />' 1. 1 System Overview (refer to Drawing Number P-125-0 <br /> otherwise noted. ) <br />' The air/VOC system enters the VES via a 4" flanged <br /> connection. The entrainment separator/silencer is the <br /> first component witha.n the process. Noise is also <br /> reduced before the air/VOC stream enters the vacuum pump. <br /> The flow, under a positive pressure of approximately 37" <br /> water column, passes over an LEL monitor (AE-1 ) , flow- <br /> measuring device (FE-1, DP-1 ) , and a static pressure <br /> measuring device (PS-1 ) . The LEL monitor is used to <br /> purge the system, and in some cases shut the entire <br /> system down. AT-1, FE-1, and DP-1 are used to calculate <br /> total pounds of VOCs destroyed, and can give valuable <br /> information concerning ground and well conditions <br /> (optional) . Static pressure is monitored to indicate <br /> blockages in the system. After the aforementioned <br /> instrumentation, the process stream enters the oxidizer; <br /> a bed filled with silica gravel. <br /> The oxidizer contains silica gravel with heating elements <br /> located at the center, and perimeter. The two main <br /> I operating principles of oxidizer are the thermal <br /> properties of the silica gravel, and b.-directional flow. <br /> The oxidizer has flow ports at the top and bottom. The <br /> I air/VOC process stream enters from one end of the <br /> oxidizer, before entering the section of the ox3.d3.zer <br /> which contains the heating elements. After oxidation, <br /> the process stream exits through the opposite port. To <br /> capture the heat generated by the oxidation process, the <br /> direction of flow is switched by pneumatically actuated <br /> I valving. Thus, what was the exit port become the <br /> entrance. The incoming air/VOC stream absorbs the <br /> thermal energy off the silica gravel, and is close to <br /> oxidation temperature before entering the section of the <br /> oxidizer which contains the heating elements. <br /> The process stream exits the oxidizer via a 3" exhaust <br /> Environmental Services General Contradng The Good Earth?Aachine"m <br /> •Site Assessment o Development "on site soil remodratron' <br /> •Site Remediation •Desip <br /> Fuel Systems Consulting Underground Storage Tank <br /> Management Programs <br />