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The Water Cooler
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At Least 18,000 Diary Cows Killed in Texas Panhandle Explosion
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<blockquote data-quote="dennishoddy" data-source="post: 4014135" data-attributes="member: 5412"><p>Latest report is a methane gas explosion caused by the failure of an exhaust fan motor that allowed the gas to build up in the massive ductwork that removes the gas.</p><p>Motor bearings or windings more than likely got hot reaching the ignition temperature of the methane resulting in a very violent explosion.</p><p>It’s a common occurrence in any dust/gas collection/exhaust system.</p><p>Grain elevators, sugar processing facilities, dust collection systems and so on.</p><p>The fix is to have a redundant system with overcurrent/undercurrent alarms built in that will detect a failure and activate the redundancy which would have prevented the explosion and alerted the facility there was a problem and it’s time to evacuate.</p><p>Back when I worked at Smith Tool as a control systems tech, we lost the ductwork that was exhausting a methanol fired continuous heat treating furnace.</p><p>Belt broke on the exhaust fan motor which caused a gas build up until it blew up. No one hurt.</p><p>I installed a high/low current trip relay wired to the control system emergency stop switch in the PLC which worked perfectly after that as designed.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 4014135, member: 5412"] Latest report is a methane gas explosion caused by the failure of an exhaust fan motor that allowed the gas to build up in the massive ductwork that removes the gas. Motor bearings or windings more than likely got hot reaching the ignition temperature of the methane resulting in a very violent explosion. It’s a common occurrence in any dust/gas collection/exhaust system. Grain elevators, sugar processing facilities, dust collection systems and so on. The fix is to have a redundant system with overcurrent/undercurrent alarms built in that will detect a failure and activate the redundancy which would have prevented the explosion and alerted the facility there was a problem and it’s time to evacuate. Back when I worked at Smith Tool as a control systems tech, we lost the ductwork that was exhausting a methanol fired continuous heat treating furnace. Belt broke on the exhaust fan motor which caused a gas build up until it blew up. No one hurt. I installed a high/low current trip relay wired to the control system emergency stop switch in the PLC which worked perfectly after that as designed. [/QUOTE]
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At Least 18,000 Diary Cows Killed in Texas Panhandle Explosion
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