STANDARD HAVENS DRUM MIX FACILITY
DRUM MIXER- This stationary design drum dryer has been updated and modernized in several ways to make it more efficient
and EPA sensitive. A Hauck Powerstar SJP980 combination burner with a 50hp motor firing 32 diesel fuel or natural gas provides the heat. the newly replaced drum has a 7 1/2' expanded combustion zone with combustion flights. The drum is 42' overall length for better retention of wet aggregates for better drying and to separate further the entry of recycle or liquid asphalt from the heat source so there is no blue smoke.
A new set of high efficiency flighting was installed. According to the owner, this plant routinely runs at 150-225TPH while maintaining efficiency.
The drum frame is constructed with a full-length, heavy 18" I-beam and cross bracing. The inlet aggregate feed is accomplished with a slinger conveyor that reverses for calibration. The one-piece forged tires are12" wide and 3.75" thick. The trunnions are 12" wide and 18" diameter. The thrust rollers are 4" thick and 12" diameter. The drum is driven with a cradle chain drive on a sprocket by a 75HP motor.
RECYCLE SYSTEM- The 9' x 13' recycle bin is skid mounted with air cannon mounted. The unit includes a grizzly and inclined 30' x 19' long belt.
It feeds to a Herman Grant rap breaker onto a 24" x 100' channel frame belt scale conveyor that includes a gravity take-up. All components of this system are in very good condition.
COLD FEED SYSTEM- This four-bin system has a 9' x13' top openings and includes 24" extensions. The 24" aggregate feeders are 9' long using 4" idlers and are driven by 3hp DC motors. the collector conveyor is 30" wide utilizing 35-degree troughing idlers and is extended to feed the 4' x 12' double deck screen. Each bin has a tach on the tail shaft and two bins have vibrators. The unit is hard wired in conduit to a junction box where the portable s/o cableling attaches. This system is in very good condition.
4' x 12' double deck screen is skid mounted. There is a 1" screen cloth on the top and a 2" scree cloth on the bottom. the main belt scale conveyor is a heavy truss-frame design 30" wide with gravity take-up and a nominal 70" long utilizing a Martin Engineering belt scale. Both conveyors and the double deck scree are in very good condition.
DUST HANDLING PACKAGE- a large knockout box on the end of the dryer allows air to slow and much of the dust drops out. the remaining dust moves to the high efficiency, large box volume, stationary design AM 1, size 33, direct-pulse bag house. there are 33 rows of bags with 14 bags in each row for a total of 462. these bags are 10" long and 6.25" in diameter to give a total of 8,793 square feet of cloth, 100% Nomax bags (bags are 1 year old). venturis are built into galvanized support cages. Any work performed on the bags and cages is via top doors for ease of access without need to enter the dusty equipment. The air is pulled thru the system by a New york Blower fan driven by a Siemens 125HP high efficiency motor. there is a remotely controlled damper and stack included. A 12" diameter auger driven by a 7.5HP motor removes the dust from the baghouse and transfers the dust to another auger that conveys it to the butt of the drum.
LIME SILO SYSTEM- A 30HP pneumatic blower blows the lime from a nominal 350BBL mineral filler silo. This silo has a bag vent style dust collector for EPA concerns. the lime is precisely weighed via a weigh pod. all support framework and work platforms are included.
SILO SYSTEM- The mix enters a 36" wide x 36" deep drag slat conveyor. It is a 300TPH ,SC88-463-83-NA electrically heated slat. The unit is 88' long driven by a 60HP high efficiency motor. The floor is built using 3/4: thick chrome carbide. The slats are 34" wide and 6.5" deep mounted via K-2 attachments on the pitch roller chain. Stairways are on both sides of the conveyor. The floor and slats were replaced and are in very good condition. The replacement chain is on pallets on site.
Mix is fed into the round anti-segregation batcher and then into a nominal 200ton,Two 200 totally enclosed storage silos. the roof of the silo has checker plate steel and a wide work platform with handrails and kick plates. The silo is insulated and wrapped with galvanized steel wrapper. Mix is discharged thru dual clamshell gates. The drive thru is 14" high over the truck scale and 101/2'wide. A 30HP air compressor supplies the air for both the silo and the baghouse. The all-steel, electronic truck scale is 10' x 70' and is low profile Rice Lake scales. Mix is transferred from one silo to the other via a 14" long by 24" x 30" bin top drag salt conveyor that incorporates twin 4" pitch roller chains.
TANKS- Two 20,000-gallon, sellers electric design liquid asphalt storage tanks are included. The liquid asphalt storage tanks are included. The liquid asphalt unloading pump, and the skid mounted Martin Engineering asphalt-pumping unit are both mounted and fully plumbed. also included is a 10,000gallon #2 diesel fuel tank w/ delivery pump, motor, and plumbing.
CONTROL HOUSE- The 10' x20' steel frame, two room control house is insulated and covered with vinyl siding. the back room houses the motor starter center and the front room houses the Martin Engineering 1998 controls, the start stop station, and the Martin Engineering computerized truck load-out system with dot matrix printer. Most of the s/o cabling enters the bottom of house.
OTHER FEATURES- The entire plant is wired in portable, s/o cabling for ease of dis-assembly and erection. overall this plant is in very good condition and has been upgraded and improved in many ways. there are many replacement parts available.Plant still standing.