Tenant Way Closed Landfill Flare Replacement Project Enclosed Flare Package

2026-11-03

Work includes providing and installing the unitized , modular , enclosed landfill gas ground flare station including all components necessary for a complete and operational system . The flare station shall be sized to extract , demist , process the condensate , compress and combust a maximum of 3 . 2 MMBtu / hr ( 150 SCFM of 35 % methane ) of landfill gas . Other combinations of flow and methane content not exceeding 3 . 2 MMbtu / hr shall be accommodated as long as methane is between 20 % and 35 %, and flow is between 25 and 150 scfm . The combination of these subsystems shall include , but not be limited to , the following components : 1 . Enclosed ground flare rated for Class 1 , Division 2 hazardous area classification a . Automatic actuated shutdown valve b . Flame arrestor c . Burner unit d . Flare stack e . Interconnecting piping and isolation valves f . Pilot and ignition system g . Internal electrical wiring h . Instrumentation and control devices i . Junction and terminal boxes 2 . Gas handling / blower system rated for Class 1 , Division 2 hazardous area classification a . Landfill gas blowers b . Demister / filter system c . Process valves d . Process piping e . System structural skid 3 . Instrumentation and valves rated for Class 1 , Division 2 hazardous area classification 4 . Power control panel and system control panel a . Enclosures / cabinets / junction boxes b . Control and annunciation devices c . Interconnecting conduit and wiring d . PLC supervisory control system e . Ethernet switch for remote connection capabilities f . All required electrical controls , motor controls , annunciation systems , alarm systems , and logic systems 5 . Factory testing and start up support a . Equipment and startup testing b . Perform initial system startup c . Demonstrate compliance with performance requirements as specified d . Provide operation start - up and training for designated personnel e . Prepare and deliver three copies of submittals and operation and maintenance manuals B . System to be factory assembled , pre - wired , calibrated , and tested prior to shipment . C . System shall be pre - piped and pre - wired to the extent possible , requiring minimal field assembly . D . Systems and assemblies furnished under this section shall be designed , manufactured , and / or supplied by a single vendor in the interest of total system compatibility , reliability , quality , cost , and single source responsibility . E . Installation , civil work , electrical interconnections , and permits are by others unless noted . FLARE SYSTEM DESCRIPTION A . Design Requirements 1 . Design system for continuous operation and destruction of LFG . a . System to be designed to operate on 20 - 35 % methane . b . System to reduce emissions in accordance with 40 CFR 60 . 18 and 40 CFR 60 . 752 ( b )( 2 ) iii . System shall reduce NMOC by 98 % by weight , and 99 % DRE of methane . c . System to be designed to comply with WAC 173 - 408 - 080 ( 4 ) Requirements for Flares . System shall achieve a methane destruction efficiency of 99 % by weight . 2 . Provide complete skid mounted blower / flare system to include : a . Structural steel skid with appropriate anchor points for connection to existing concrete slab . Flare shall be able to withstand loads and stresses per the requirements of UBC100 mph wind loading and seismic zone criteria . b . Two ( 2 ) identical blowers , complete with each sized for 480 VAC , totally - enclosed , fan - cooled , inverter duty electric motor rated for installation in NEC 500 Class I , Division 2 environments and direct drive . Blower to be rated for 150 SCFM at - 35 inches WC inlet vacuum and 15 inches WC discharge pressure . Blowers shall have been designed for use with and in the presence of landfill gas . The blower shall include anti - corrosion coating or material suitable in the presence of landfill gas as approved by the manufacturer . c . Enclosed flare sized for 150 SCFM LFG with minimum 7 : 1 turndown . Turndown based on 20 - 35 % methane content and 1600 degrees F . Minimum operating temperature shall be 1400 degrees F . Maximum internal temperature rating shall be 2000 degrees F . d . Inlet demister / knockout sized for 300 SCFM . Knockout to include : 1 ) Multi - layer demister pad / filter rated for 100 % removal efficiency at 6 - micron droplet size . The demister / filter vessel shall be capable of withstanding no less than 5 PSIG pressure / vacuum 2 ) Differential pressure gage across demister pad / filter 3 ) Visual liquid level gage . 4 ) Cleanout access . 5 ) Inspection port . 6 ) Pipe coupling in the bottom of the filter for condensate removal . e . Thermocouples : 3 each , housed in Inconel sheaths f . Test ports for air quality testing sensor access and view ports , one at each thermocouple and two for view of main flame and pilot . g . Eccentric flame arrester . Flame arrestor shall be provided with pressure monitoring such that both flare back pressure and flare and flame arrestor back pressure can be monitored . h . Flame safeguard controller i . Flare temperature controller

Washington

2026-05-01