Vulcan 1 Ton Compact Mobile Thermal Desorption Unit in Moberly, MO
- Moberly, MO
- $998,000 USD
Vulcan 1 Ton Compact Mobile Thermal Desorption Unit - One ton per hour indirect thermal desorption unit*. 36" diameter x 15' heated length rotary kiln with a maximum energy input of approximately 2.5 MMBtu/hr. Heat provided by industrial, furnace style burners. Designed to remediate soils and drill cuttings contaminated with petroleum hydrocarbons. Petroleum reclamation through three stage Vapor Recovery Unit.
• Feed System – hopper, live bottom feeder, transfer auger, knife gate airlock and feed auger
• Primary Treatment Unit – Stainless steel rotary drum, 36" diameter x 15" long heat zone
• Solids Discharge System – incline screw conveyor and knife gate airlock
• Cyclone – mechanical gas-solid separator which uses centrifugal force to drop heavier solids out of lighter gas streams
• First Stage Condensing o Oil Scrubber – 2.5' diameter x 6.25' open height, direct contact condensing tower with a vane mist eliminator, atomizing spray bars, circulation tank, pump with backup, and dual bag filters o Shell and Tube Heat Exchanger – 70,000 Btu, single pass, counter-current heat exchanger
• Second Stage Condensing o Water Scrubber – 2.5' diameter x 6.25' open height, direct contact condensing tower with a vane mist eliminator, atomizing spray bars, circulation tank, pump with backup, and dual bag filters o Air Cooled Heat Exchanger – 650,000 Btu, forced draft, finned tube, air cooler o Oil/Water Separator – 50 GPM maximum influent flow rate will remove 20 micron and larger oil droplets, producing up to an effluent quality of 10 PPM
• Third Stage Condensing o Refrigerated Gas Dryer – Custom designed to improve efficiency and decrease total required equipment. Gas passes over an expansion coil and the condensate drains out the bottom
• Secondary Treatment Unit – 500 CFM direct fired thermal oxidizer operating up to 2,000°F for 2 seconds residence time
• Induced Draft Fan – variable speed, radial blade, exhaust fan with 5 hp electric motor
PROCESS DESCRIPTION Drill cuttings, which are stockpiled by client, will be transferred to the feed hopper of the Primary Treatment Unit (PTU) with client’s backhoe or skid loader. The material will be fed to a feed hopper mounted on a live bottom feed. From the live bottom feed, material is lifted to the knife gate airlocks via a transfer auger. The knife gates supply the kiln feed auger which conveys material directly into the PTU.
The electric rotary kiln has multiple heating zones, each with feedback control by thermocouples along the drum. The operating temperature of the drum is up to 1,150 degrees Fahrenheit (621 Celsius). The rotary kiln is in a fiber refractory lined furnace where dual fuel burners heat the drum. The kiln itself operates in an oxygen-deficient and slightly negative atmosphere. Vapors from the contaminated soil are pulled out of the system in a counter-current direction to the material flow.
Vapor from the primary unit is pulled into cyclone dust collector to remove entrained particulate matter from the vapor stream. This pre-cleaning provides a cleaner recovered oil product. Vapor out of the cyclone is routed to the oil condenser which operates at ≈ 212 degrees Fahrenheit (121 Celsius) and removes dust particulate, as well as condenses the heavier hydrocarbon fraction in the vapor stream. Condensed oil is gravity fed to a holding tank and recirculated by a pump through bag filters and back to the atomizing spray nozzles.
Water and lighter hydrocarbons not condensed in the oil condenser are pulled into the water condenser which drives to condense all the remaining oil and water. The fluid from condenser is gravity fed to an oil/water separator, then pumped to a water and oil holding tank (to be supplied by client). Water is recirculated by a pump through bag filters and once again back to the atomizing spray nozzles of the water tower.
Any remaining condensables are passed over a refrigerated expansion coil where condensate drains to the bottom. Non-condensable gases are pulled from this final condenser by induced draft fan and pushed into the secondary treatment unit, where all remaining hydrocarbons are converted to carbon dioxide and water in a direct fired thermal oxidizer.
• Piping for gas or light fuel oil
• Acid scrubbers
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