GOODWIN BATCH PRODUCTION MOBI LE ASPHALT PLANTS

Transcription

1 GOODWIN BATCH PRODUCTION MOBI LE ASPHALT PLANTS

2 ~~~~ ~~~~~~B=~~;~ ) BASIC MOBILE BA From the sand hopper by belt feeder and from the stone hoppers by either electric vibrating feeders or belt feeders, material is fed onto a continuous belt conveyor and delivered to the dust plant/dryer via an inclined belt conveyor. The belt conveyor delivers material to the Dryer feed ring, which moves the material onto a series of lifters. As the Dryer cylinder rotates, the material is cascaded through hot gases produced by the oil burner and travels along the length of the cytinder to the discharge end Pusher plates allow side discharge of material into a discharge chute, which feeds into the boot of the hot stone elevator. The multi-cyclone, single stage dust collecting plant mounted on the rear of the chassis collects the dust and is delivered to the Dryer discharge chute by means of two screw conveyors. The hot stone elevator takes the material from the Dust planvdryer unit onto the vibrating screen where the material is graded and delivered into the individual compartments of the hot stone storage bins. Oversize material rejected by the top deck of Cold Feed Unit Dust PI.nt/Dryer

3 ~. TCH MIX LAYOUT the screen is passed to a reject chute at the end of the mixing and screening section. The filler is loaded into the silo and with the binder supply in circulation, the plant is ready for batch production. From a control cabin the operator controls the flow of material according to the specification required. Aggregate is discharged to the batch weigh hopper from the storage bins and weighed. The material from the batch weigh ~ is then discharged into a fulty enclosed batch elevator and conveyed to the Mixer. Filler is added from the filler silo through a filler weigh hopper adjacent to the Rota Mixer. Binder is weighed Into a Binder Weigh Tank adjacent to the Rota Mixer. Aggregate is passed into the Rota Mixer for preset dry mixing time after which binder is added and mixing continues for the necessary wet mix period until the batch is ready for discharge into the transporter sited below the discharge doors of the Rota Mixer. Provision is made for filler to be added before or after binder according to requirements. One binder ring main connection is offered as standard.

4 I~~~a~~i~~~ The Cold Feed Unit is designed for loader type feeding and consists of Individual sand and stone hoppers each complete with its supporting structure and feeder bolted together to form one unit Sand hoppers are fitted with belt feeders and the stone hoppers can be fitted with either belt feeders or vibrating tray feeders. The belt feeders can also incorporate variable speed drives. These units deliver material onto a horizontal trough collecting conveyor transporting material to a link conveyor which jofns the cold feed unit to the dryer. Drive to the belt feeder and conveyor Is through shaft mounted gear units, W8dgebetts and pulleys. The conveyor belts are heavy duty type with adjustment by tension screws acting through the tail drums. Wing plates are fitted over the full length of the belt feeders and the conveyor at all feed points. Adjustabfe doors are fitted to the outlet of each hopper to regulate the feed rate and to facilitate the removal of any. obstruction. Feeders and conyeyofs are each fitted with Individual electr:c motors, the total feed unit is pre-wired to one contactor/connectlon box to receive the plant mains and control cable. Bin extension and division pl.ates are fitted as standard to prevent intermixing of materials. two optional sizes of extension plates are available to give additional bin capacity. Each unit incorporates adjustable swing down trailer landing legs and towing of the unit is through fifth wheel kingpin with 3 line air/bjake system and the axle incorporates leaf spring compensation. Up t05 bin units can be incorporated in mobileforrn, the control panel has facilities for up to 10 cold feed bin units, therefore two 5 bin units can be linked to run in tandem.

5 The unit incorporates an inclined link conveyor for delivering material from the Cold Feed Unit to the Dryer Drum by means of a wide trough belt. For travelling purposes the link conveyor is designed to fold away within the configuration of the chassis. The Dust Ptant incorporates an 18 cell cast iron mutti-cyclone singte stage dust plant and utilises a paddle b&ade type fan driven by an electric motor. The collected dust is delivered to a discharge chute by means of two screw c0nveyors built into the unit oraftematively it can be blown to a silo for a controlled addition to the Mixer. The chimney of the Dust plant pivots down onto the multi-cyclone unit for travelling purposes. A damper is incorporated in the fan stack wh~h is of remote control from the controf cabin. Alternatively a separate mobile or transportable Dust Plant or bag filter unit can be suppfied. Alternatively a separate mobile or transportable Dust plant or bag fitter unit can be supplied The Dryer cytinder is constructed of heavy rolled steel plate and fitted with flights of lifters staggered along the length of the cytinder. The cylinder is fitted with two machined steel support bands mounted on brackets, with a preset allowance for expansion. A feed drum receives the cotd aggregate from the link conveyor and elevates it into the cylinder into a series of lifters, whk:h cascade the material through the hot gases produced by the 011 burner. As the material reaches the end of the cylinder, ptjsher plates allow side discharge of material into a discharge boot which feeds into the boot of a hot stone elevator. The Drum is supported on 4 heavy duty type support rollers Incorporating roller bearings located In heavy duty housings. Two adjustable thrust roilefs are fitted to prevent longitudinal movement of the cyiinder. The drum is driven by chajn drive through an electric motor and totally enclosed gear unit, a chain ring is fixed around the drum and a chain pinion Incorporated in the electric motor and gear unit assembly. The drive assem~ incorporates a soft start mechanism to give a very smooth start, which results In a considerable Increase in the life of the chain, chain wheel and chain pinion. Heat is generated by a self-proportioning oil burner, situated at the delivery end of the cytlnder. The burner is a setfproportioning ajr/oil ratio and Is comp'ete with combustion chamber, ~owing fan, 011 pump, piping, filters. valves and gauges in a package unit designed to the very latest specification and Incorporating a retractable carriage to enable the whole unit to be withdrawn from the drum for ease of majntenanoe. Remote automatic tgnttion and manual flame modulation with temperature indication, together with fan and flame failure Indk:ators are supplied as standard equipment The Dryer discharge chute Incorporates an infra-red type pyrometer with remote temperature Indication mounted in the control cabin. The Dryer/Dust plant unit incorporates a double axle with leaf springs and twin wheels with 3-line braking system and towing is through a fifth wheel kingpin arrangement The unit is supported on adjustable fold down type trailer landing legs. Alternative oorners are available and can be fitted to suit a customers requirements. Automatic damper controt is also a feature that can be offered.

6 ~ ('--~ ~R EENINGUNI~ ) The Mixing and Screening unit incorporates a hot stone elevator which receives material from the Dryer through the Dryer discharge chute into the elevator feed boot Buckets collect the material at the feed boot and elevate It to the top of the Mixing and Screening unit, where the material is delivered from the elevator through a discharge chute feeding onto a Goodwin Vitex Screen. The elevator casing is constructed from heavy steel plate and is fitted with reinforced steel buckets on steel bushed chain with a spfing loaded take-up mechanism at the tall shaft. Drive is at the head shaft by electric motor and shaft mounted gear unit incorporating a hold back device. A number of large quick release doors are included in the casing design for maintenance purposes. The elevator Is Incorporated on the side of the Mixing section and Is pivoted to ~ for trawuing ~rposes. The Mixing and Screening section incorporates a welt-proven. four bearing, Goodwin Vitex type screen driven by an electric motor and wedgebelts and looudes a complete dust cover to prevent emission of dust Retected stone from the top deck of the screen is delivered to ground level by a fabficated steel chute. The hot storage ~n section provides 4 compartments. each incorporating an overflow chute for delivering excess material to ground level. Each bin compartment is fitted with tray type doors on self-lubricating rollers and operated by two pneumatic cylinders, which enable the doors to be closed in two stages giving added accuracy of weigh- Ing. The batch weigh hopper is suspended on electricaj k)ad cells and delivers material to a fully eooiosed batch elevator through a full width quadrant door operated through a pneumatic cylinder. The batch elevator incorporates two runs at chain, reinforced steel buckets which are close fitted for conveying material from the batch weigh hopper to the Rota Mixer. The Rota Mixer is a standard we"'proven machine of heavy construction and is lined throughout with wear resistant liner plates. It has cast steel paddle arms with rene~ alloy tips. The paddle arms are secured to twin paddle shafts running in spherical roller bearings. The Mixer is driven through two heavy duty chain wheels from a gear unit and electric motor. The whole drive unit Incorporates an overload device to give protection against dooble batchino.

7 T~Left BaEh ei8v8t«iho-'ng cio.. fnth buckets. T~ Right PhilpeIo8d ~... incofpor8ted ~ all weigtting unit... Mixing & $aeenlng eection. BottOOl Left H)G-* 0P8f8Ik1g legs for I8iIIng.r.s IcJweq Mixing & Scr88ning section. The Mixer incorporates a full width rotary door operated by pneumatic air cylinders. which ensure clean and efficient discharge of materials from the Mixer. The Rota Mixer has a mild steel dust cover to prevent fume and dust emission during mixing. The Filler Weigh Hopper and Binder Weigh Tank are situated above the Rota Mixer and are suspended on electrical ~d cells. The Filler Weigh Hopper discharges material through a pneumatically operated quadrant door. The Binder Weigh Tank has an air operated heated valve and discharges binder to the Mixer through a spray bar. One ring main connection complete with valve and temperature probe is supplied as standard A compressor Is positioned on the main chassis with ioouilt facility to remove to a remote position if required. The whole unit has been designed such that items do not have to be removed for transit purposes. thereby making the mixing and screening section a self-contained unit rapidly installed on site and eliminates the necessity of craneage. The main chassis is of extremely robust design constrooed from steel universal beams. rolled channel and hollow section material and Incorporates a hitch hoist mechanism at the front towing end, the braking system as a 3-line air/hydraulic system with fifth wheel towing facility. The chassis Incorporates a double axle with leaf springs and twin wheels. As an optional extra, hydraulic operating legs are available for raising the plant, these are driven through a small petrol engine.

8 Filler systems can be supplied as transportable or fully mobile units. The filter silo of capacity matched to plant output and specification requirements is arranged for easy on site erection and is supplied complete with inlet pipe suitable for bulk delivery tanker connection. The filler is fed into the filler weigh hopper from the filler silo through a screw conveyor. The screw conveyor is driven through a geared electric motor and flexi~e coupling. Aeration pads are also i~uded to ensure free flow of filler from the silo cone disharge area. One or two independent silos can be supplied depending on customer requirements. The Bitumen tanks can be electrically or hot oil heated and are thermostatically controlled with capacities according to plant output and binder grade requirements. The tanks are connected Into a trace heated binder ring main system. Bitumen is delivered to a binder weigh tank which is supported on load cells. The binder weigh tank is thermostatically heated Binder is delivered from the weigh tank through a pneumatically operated valve into the bitumen feed pipe, which is connected to the bitumen spray bar supported on the Rota Mixer. One Bitumen Ring Main system is offered as standard. MOBILITY IN DESIGN The Goodwin Mobile Batch Asphalt Plant range of products has been designed for full mobility and fast site Installation. The plants can be installed and in operation within a few hours of arriving on site.

9 COLD FEED UNIT.-..~ Drying Capac,ty Is approximate and based on non-pof'oo8 matel1al of awox Icg/m. (1001b'{;F) NOTE: All figures refer to 30 Inclination but figures given for 1 CMI moisture could be k1creased by Incinfng Dryer at 4' Outputs are based on the Dryer incorporating an integral multt-cyciooe unit These outputs can be ~ wt1en a separate Dust Ptant un,t is Installed. MIXING & SCREENING. t We ~ our customef8 from the day the ont8f is p68c8d thrcmlgh "-t8'lation and testing end the working Itfe Of me product. It Is a first class ~ and our pttilo8opf\y is to put every Goodwin, 8 long established company with an International reputation offera a bf'oed product range, regarded a. probably the most RIgged equipment of its type available anywhere in the world. sjleres b8ct(-up on plants anywhere In the workj, a team of aervk» englneefa with fun knowledge Of the practk:al operafton ~ your plant is always avamabie. --;;M:~~--- -.: GOODWIN BARSBY LIMITED po Bu ~",~,~t. L~O'$te' le1 ',led EC""JI"nn r~l~n.. IO~j31 26~OI r" J4J04. - ~ - 0_"-' - - ~.t. -. ~--- ' ~.-II :: ~---",--