Installation form: main unit is built up in modular and joined together with screws.
Operation conditions concerning production capacity:
Altitude ＜1500m
Average moisture content in aggregates≤5%
Optimum working temperature: 200C～500C
Power supply: 380V/50HZ
Cyclic period of mixing: 45～60sec
Mixing capacity of each batch: 4000kg/batch
Aggregates: Clean and sized aggregates with moisture content <5%, dust content <1%, density ≥1.6t/m3. Needle-type or flat aggregate is not acceptable. Aggregates density, PH and hardness should conform to Material Regulations on Road Construction made by Ministry of Communication.
Mineral powder: Bag-packaged clean mineral powder or bulk fresh mineral powder, with moisture content less than 0.5%
Bitumen: Standard bitumen in conformity with national regulationsFuel: Approved/ certified fuel with test report released by the testing authority. Fuel application should conform to relevant provisions specified in Burner’s Operation Introduction
Main technical specifications
一、Supply system of cold aggregate
Adopt modular design concept. Match aggregate belt machine as per customer’s requirement.
Frequency-control feeder can adjust speed according to output setting and proportioning demand.
High-quality rubber belt is used in the cold hopper, equipped with warning unit for feeding interruption.
Aggregate belt machine/ feed belt machine is equipped with deviation corrector.
Each hopper is equipped with grid on the top to resist incompliant stone material.
Supply system of cold aggregate (Part 1)
1.1 Cold aggregate bin
Structure: six hoppers built in two bulks
Volume of single hopper: 14.5m3
Feed width: 3.6m
Hopper quantity: 6pcs
1.2Feed belt machine
Structure: Belt delivery/ primary distribution
Belt width: 600mm
Control: Frequency
Working capacity: 120 t/h
Driving power: 3kw
Quantity: 6sets
1.3Aggregate belt conveyor
Structure: Belt delivery
Working capacity: 360 t/h
Belt width: 800 mm
Driving power: 7.5kw
Quantity: 1set
1.4Feed belt conveyor
Structure: Belt delivery
Working capacity: 360 t/h
Belt width: 800mm
Inclination degree: ＜180
Driving power: 7.5kw
Quantity: 1set
二、Baking& heating& lifting system
Four-wheels friction drive
Make heat preservation outside the drum to effectively reduce heat loss
Automatic proportioning burner
Gravitational unload, chain-and-bucket elevator with twin steel boards
Counterclockwise-rotation protector to prevent counterclockwise rotation upon power failure
Lifting bucket is made of steel board via bending and welding. Enclose the complete bucket in a steel housing.
Maintenance platform and ladder on the top, allowable dismantlement
Access door at the bottom to regulate chain tension
2.Baking& heating& lifting system (Part 2)
2.1 Drying drum
Structure: Barrel, inclined, countercurrent
Driving type: Four-wheel friction drive
Working capacity: 340 t/h (moisture content of aggregate≤5% at discharge temperature of 1600C)
Drum diameter: Φ2750mm
Drum length: 9000mm
Driving power: 30KW×4
Inclination degree: 4°
Temperature measurement: Thermal resistance measurement for stone temperature
Quantity: 1set
2.2Main burner
Control: Proportional adjustment, automatically regulate air door and fuel quantity as per stone temperature change
Volume: 2400kg/h
Fuel type: 0# diesel oil, 180# heavy oil
Fuel consumption: 6～7kg/t
Temperature tolerance: ±9 0C (when moisture content of aggregate is stable)
Fan power: 45kw
Oil pump power: 7.5kw
Heater ： 60kw
Quantity: 1set
2.3Diesel tank
Structure: Horizontal steel barrel
Max. Volume: 40 m3
Fittings: Pipe, valve and etc.
Quantity: 1set
2.4 Hot-stone elevator
Structure: Steep lifting bucket gravitational unload
Working capacity: 340t/h
Driving power: 37kw
Quantity: 1set
三、Screening& metering system
Professional vibration-screen design, high-efficient and reliable screening capacity
Bin equipped with level indicator
With discharge pipe for incompliant material and overflow pipe for compliant material
Metering system measures force with detector. Signal directly inputs into electronic scale and is displayed by digital，with automatic correction and dynamic compensation functions.
3.Screening& metering system (Part 3)
3.1Vibration screen
Structure: Inclined five distribution
Working capacity: 340t/h
Amplitude: 5～8mm
Driving power: 15kw×2
3.2Hot-aggregate bin
Structure: Full-enclosed, separated, square, steel, five-sections bin
Full volume: 48m3
Quantity: 1set
3.3Stone-material metering
Structure: Four-points force measurement
Weighing capacity: 4000kg
Metering precision (static state): ±0.5 %
Quantity: 1set
3.4Mineral powder metering
Structure: Three-points force measurement
Weighing capacity: 500kg
Metering precision (static state): ±0.2%
Quantity: 1set
3.5Bitumen metering
Structure: Three-points force measurement
Weighing capacity: 500kg
Metering precision (static state): ±0.2 %
Quantity: 1set
四、Supply system for fresh powder and recovered powder
Powder supply system comprises powder, powder transition bin, discharging valve, spiral conveyor, powder elevator and etc.
4.Supply system for fresh powder and recovered powder (Part 4)
4.1Spiral conveyor1#
Rated output: 20t/h
Driving power: 7.5kw
Quantity: 1set
4.2Spiral conveyor2#
Rated output: 25t/h
Driving power: 5.5kw
Quantity: 1set
4.3Powder elevator
Rated output：28t/h
Driving power: 7.5kw
Quantity: 1set
4.4Spiral conveyor
Rated output: 30t/h
Driving power: 7.5kw
Quantity: 1set
4.5Mineral powder bin
Structure: squareness double bin steel structure+ Round, vertical steel structure
Volume of double bin: 50 m3 *2 for fresh powder
Transition bin: Fresh powder 19m3, recovered powder 9m3
Feeding method: fresh powder conveyor pipe + recovered perpendicular elevator
Dedusting method: bag dedustor
Quantity: 1set
4.6Star-type discharge valve
Type: YJD-16HX
Working capacity: 16L/rotation
Impeller rotation speed: 33rpm
Driving power: 1.5KW
Quantity: 2sets
五、Mixing system
Mixing bade and lining board made of friction-resistance material
Synchronous twin-shaft rotary mixing system rotates materials in the mixer along mixing shaft cycle and axis. Material makes 3D rotation. The purpose is to ensure achieve best mixing effect during mixing period.
5.Mixing system (Part 5)
5.1Mixer
Structure: Twin horizontal shafts/ rotary mixing/ side-moving door
Mixing capacity: 4000kg/batch
Driving power: 55KW×2
Cycle: 45～60sec
Quantity: 1set
5.2Mineral powder metering& spiral conveyor
Delivery: 100t/h
Driving power: 15kw
Quantity: 1set
5.3Mineral powder metering butterfly valve
Type: DN300
Nominal diameter: Φ300mm
Quantity: 1set
六、Dedusting system
Square steel cabinet, impulse-air bag dedusting system
2-stage protection for bag. First-stage protection is working temperature setting in thermo-detector. As measured temperature by sensor is higher than setting, cold-air valve in the air-in pipe opens automatically. On the second-stage protection, if temperature does not fall by cold-air valve, impulse controller will send signal to burner control cabinet to shut off power supply to burner.
6.Dedusting system (Part 6)
6.1Cyclone dedustor (I-stage dedusting)
Structure: collect dust with 2 drums
Dedusting method: Centrifugal dust collection (Supply to hot-material elevator for mix)
Quantity: 1set
6.2Star-type discharge valve
Type: YJD- 16HX
Working capacity: 16L/rotation
Impeller rotation speed: 33rpm
Driving power: 1.5kw
Quantity: 2sets
6.3Bag dedustor (II-stage dedusting)
Structure: Square steel cabinet/ heat-preservation with asbestos and colored steel board
Dedusting method: Sectional impulse back-flushing by compressed air
Filtering area: 1400m2
Max negative pressure: 2,800pa
Wind speed of filtering: 1.0～1.5m/sec
Powder discharge: ≤100mg/n.m3
Driving power: 7.5KW
Quantity: 1set
6.4Main draught fan
Structure: Steel centrifugal fan
Airflow: 113,596m3/h
Full pressure: 4,518pa
Work efficiency: 80%
Driving power: 220kw
Quantity: 1setNote:
Too large moisture content and dust content of aggregate will serious affect performance of cyclone dedustor and bag dedustor.
七、The bottom type product bin system
Product bin lie in the bottom of stirring, stirring discharge product fill in it speediest.
Product bin bottom’s cone make heat conductive oil heating,
Product receive make no bottom squeegee conveyor by patent technique design
7. Bottom product bin system (part 7)
7.1Product bin (patent technique)
Structure: bottom, double access
Capacity: 180T
Quantity: 1set
7.2No bottom squeegee conveyor (patent technique)
Structure: no bottom/double function/three aggregate
Driving power: 18.5kw
Quantity: 1set
Note: Product temperature loss 5%/12hour, product storage period fluctuates 12 hours. The best time don’t surpass 12 hours.
八、Heat conductive oil heating system
Connect heat conductive oil furnace, circulating oil pump, bitumen high-temperature tank, and bitumen heat-preserved delivery pump and bitumen zero-position tank with heat conductive oil pipe, forming heat conductive oil heating system
Heat conductive oil furnace equips automatic temperature-control oil burner. 0# diesel oil
Recommend heat-preservation action for pipe after installation and debugging to avoid operator scalded, save fuel and improve heat efficiency.
8.Heat conductive oil heating system (Part 8)
8.1Heat conductive oil furnace
Furnace type: YYW-930Y
Burner type: RL-100
Rated heat efficiency: 800KW
Suitable fuel: 0# diesel oil
Driving power of burner: 3KW
Power of heat conductive oil circulating pump: 22KW
Power of heat conductive oil filling pump: 1.5kw
Quantity: 1set
8.2Bitumen high-temperature tank
Structure: Horizontal steel barrel/ heat-preservation with asbestos
Volume: 60m3
Heating method: Heat conductive oil
Quantity: 3sets
Fittings: Pipe, valve and etc.
8.3Bitumen drainage pond
Structure: Horizontal rectangle steel structure
Volume: 8m3
Heating method: Heat conductive oil
Quantity: 1set
Fittings: Pipe, valve and etc.
8.4Bitumen delivery pump
Type: QGB80×3-80 3” heat-preserved screw pump
Delivery flow rate: 25m3/h
Delivery lift: 80m
Driving power: 7.5KW
Quantity: 2sets
Note:
Mentioned heating system does not contain heat conductive oil.
九、 Gas-circuit control system
9.Gas-circuit control system (Part 9)
9.1Air compressor
Structure: piston
Exhaust quantity: 2.0 m3/min
Exhaust pressure: 7.5bar
Driving power: 15KW
Quantity: 3 sets
9.2Solenoid valve
Pressure range: 1.5～8kgf/cm2
Voltage range: AC187V～242V
Quantity: 1set
9.3Relief valve
Pressure range: 0.5～8.5kgf/cm2
Quantity: 3pcs
9.Cylinder
Pressure range: 0.5～7kgf/cm2
Quantity: 1set
Computer-controlled system
PLC serves as central controller。
User-friendly control interface facilitates operation and learning. It is convenient and reliable by control. Computer can memorize or print all required running records and proportion datum.
Control room is equipped with air-conditioner, providing operator comfortable working environment.
Note: High-voltage cable and transformer shall be at least 40m away from control room, avoiding interfering computer.
10.Computer-controlled system (Part 10)
Central control room
Dimension: L 7000mm, W 2400mm
Quantity: 1pc
Air conditioner
Type: 2P
Quantity: 1pc
Industrial computer
Type: Industrial control/ PLC
Control: Manual/ semi-auto/ auto
Quantity of displayer: 1pc
Quantity of printer: 1pc
Computer control cabinet
Type: Lyre
Quantity: 1pc
Fittings: Electric components, receiver of control signals and various instruments
Heavy-current control cabinet
Type: Standing
Quantity: 1set
Fittings: Electric components, receiver of control signals and various instruments