LB4000 Environmental-Friendly & Energy-Saving Asphalt Mixing Plant

Dual-Fuel Type (Oil & Gas)

Technical Specification

Heze Zhenhua Machinery Manufacturing Co., Ltd.
HEZE ZHENHUA MACHINERY MANUFACTURING LIMITED COMPANY

I. General Parameters of LB4000 Plant

1. Production capacity: 320 t/h (rated condition, continuous feeding)

2. Fuel consumption: ≤6.5 kg/t (rated condition)

Rated working conditions:

1. Aggregate moisture content: 3%

2. Finished mixture temperature: 140°C

3. Ambient temperature: 20°C

4. Site altitude: below 1000 m

5. Fuel: Heavy oil, calorific value 9000 kcal/kg

6. Aggregate gradation must meet specification requirements

7. Measuring accuracy:

• Aggregate: ±0.5%

• Filler: ±0.5%

• Asphalt: ±0.5%

• Asphalt–aggregate ratio error: ±0.5%

4. Dust removal efficiency (after baghouse):

• Dust emission: <50 mg/Nm³

• Ringelmann blackness: < Grade 1

• Environmental noise: <70 dB(A) at 20 m from main noise source

5. Other parameters:

• Total installed power: 900 kW

• Total weight: approx. 350 t

• Required area: Length 58 m × Width 52 m

II. Component Specifications

1. Aggregate Feeding System (Primary Batching System)

1.1 Six cold aggregate bins

• Capacity per bin: 10 m³

• Feeding opening: 4.22 m × 2.8 m

• Loading height: 2.82 m

• Equipped with grizzly screen to prevent oversized materials

1.2 Six belt feeders

• Model: FZ

• Belt size: 800 mm × 2.2 m

• Capacity: 320 t/h (sand and aggregates <40 mm)

• Motor power: 3 kW (variable frequency)

• Speed ratio: 20:1

• Accuracy: ±2%

1.3 Two bin vibrators

• Motor power: 250 W

1.4 Collecting belt conveyor

• Motor power: 7.5 kW

• Belt width: 800 mm

• Capacity: 480 t/h

1.5 Inclined feeding conveyor

• Motor power: 7.5 kW

• Belt width: 800 mm

• Capacity: 480 t/h

1.6 Environmental protection system

• Baghouse dust collector: 100 bags

• Induced fan power: 15 kW

• Axial fans and ducts: multiple sets

2. Drying System

2.1 Drying drum

• Size: 3 m diameter × 12 m length × 18 mm thickness

• Drive: 4 friction rollers

• Motors: 4 × 30 kW

• Insulation: 50 mm high‑temperature insulation wool + galvanized steel outer cover

• Capacity: 480 t/h

2.1.1 Temperature control

• Method: Infrared measurement

• Accuracy: <±5°C

2.2 Dual-Fuel Burner (FRD‑TR/H4000)

• Maximum output power: 26.5 MW

• Maximum fuel oil consumption: 2250 kg/h

• Maximum natural gas consumption: 2750 m³/h

• Modulation ratio: 1:4

• Main fuels: Natural gas, heavy oil, fuel oil

• Main fuel valve size: DN200

• Ignition fuel: Acetylene

• Flame length: ~5.6 m

• Flame diameter: ~1.3 m

• Flame temperature: 1300–1800°C

• Combustion efficiency: >99%

• Electrical power consumption: ≤64 kW

• Compressed air consumption: ≤5.5 m³/min

2.2.1 Silencer

• Type: Reflective muffler

2.2.2 Air compressor

• Air volume: 1.81 m³/min

• Pressure: 0.85 MPa

• Motor power: 22 kW

2.2.3 Diesel supply system

• Pump type: Gear pump

• Pressure: 1.2 MPa

• Flow: 4740 L/h

• Motor power: 3 kW

3. Screening, Weighing & Mixing System

3.1 Hot aggregate elevator

• Type: Vertical, fully enclosed, double-chain

• Capacity: 480 t/h

• Motor power: 37 kW

3.2 Vibrating screen

• Type: High-speed inclined 6‑deck screen

• Capacity: 480 t/h

• Aggregate types: 6

• Motor power: 2 × 11 kW

3.3 Insulated hot aggregate bins

• Type: 6 compartments with 50 mm insulation

• Total capacity: 100 t

• Level detection: Digital level indicators

• Temperature detection: Sensor in sand bin

• Equipped with overflow pipes

• Pneumatic discharge system with coarse/fine weighing

3.4 Aggregate weighing hopper

• Type: Single hopper, 3‑point suspension

• Capacity: 4000 kg

• 3 load cells

3.5 Asphalt weighing hopper

• Type: Single hopper, insulated, oil‑heated

• Capacity: 480 kg

• 3 load cells

• Gravity flow into mixer

• Anti‑overfill protection

3.6 Filler weighing hopper

• Type: Single hopper with sealing gate

• Capacity: 600 kg

• 1 load cell

3.7 Weighing system features

• All hoppers independently suspended on load cells

• Weight signals transmitted to control room for digital display and automatic control

3.8 Insulated mixer

• Type: Twin‑shaft paddle mixer with 50 mm insulation

• Mixing capacity: 4000 kg per batch

• Motors: 2 × 55 kW

• Infrared temperature sensor at discharge door

• Mixing cycle: 55 seconds

• Output: 320 t/h

3.9 Mixing tower

• Equipped with maintenance lifting device

• Truck passage: 6 m × 3.9 m

4. Asphalt Supply System

4.1 Asphalt tanks

• Quantity: 4 × 50,000 L

• Heating: Thermal oil coil

• Insulation: Corrugated steel outer layer

• Level detection: Continuous level gauge

• Agitators: 2 × 2 units

4.2 Asphalt pump

• Type: Thermal‑oil‑heated screw pump

• Flow: 1400 L/min

• Motor: 15 kW

4.3 Thermal oil heater

• Model: TR35

• Heating capacity: 1,000,000 kcal/h

• Max temperature: ≤260°C

• Circulation pump: 30 m³/h, 1.6 MPa, 7.5 kW

• Fully automatic PLC control

5. Filler Supply System

5.1 New filler silo

• Capacity: 45 m³

• Pneumatic loading

• Over‑pressure protection

• Level indicators

• Anti‑bridging air‑floating device

5.2 Recovered filler silo

• Capacity: 45 m³

• Connected to secondary baghouse

• Over‑pressure protection

• Level indicators

• Anti‑bridging air‑floating device

• Excess dust: lifted and moistened for discharge

5.3 Screw conveyors

• Quantity: 2

• Size: 304 mm × 2660 mm

• Motor: 5.5 kW × 2

• Capacity: 60 t/h

6. Dust Collection System

• Type: Primary gravity + secondary baghouse

• Primary separation: ≥75 μm

• Secondary emission: ≤50 mg/Nm³ (≤15 mg/Nm³ after aggregate washing)

• Max air volume: 147,000 m³/h

6.1 Primary dust collector

• Gravity type

• Adjustable guide plates

• Dust returned to hot elevator

6.2 Baghouse

• Reverse‑air pulse cleaning

• Bag material: NOMEX, 500 g/m²

• Bags: 1120 pcs

• Area: 1210 m²

• Filter speed: 1.46 m/min

• Top‑removal bags

• Temperature monitoring & protection

• Remote‑controlled air‑flow limiter

• Negative pressure monitoring

6.2.1 Dust discharge screw

• Motor: 7.5 kW × 2

• Capacity: 30 t/h

6.2.2 Induced draft fan

• Type: Centrifugal

• Power: 200 kW

• Air volume: 147,000 m³/h

6.2.3 Dust return system

• Pneumatic conveying + elevator

• Elevator motor: 11 kW

6.2.4 Dust humidifier

• Power: 15 kW

7. Finished Material Silo

• Bottom-mounted silo, capacity 120 t

• Enclosed receiving corridor

• Front and rear fast-rolling doors with sensors

• Photocatalytic plasma purifier for asphalt fume treatment

• Power: 22 kW

• Axial fans and ducts included

8. Control System

• Large-screen LCD computer control system

• Manual, semi-automatic, and fully automatic modes

• Power supply: 380/220 V ±5%, 50 Hz

8.1 Motor control

• Breaker + short-circuit + overload protection

• Push-button operation

8.2 Weighing control

• Automatic weighing

• Auto compensation

• Asphalt over‑weight protection

• Formula input & printing

8.3 Mixing control

• Fully automatic PLC control

• Manual and automatic modes

8.4 Burner control

• Automatic start, ignition, monitoring, fault protection

9. Paint

• Standard color: Grey (main structure), silver-white (dust system)

• Custom colors available upon request

User-Supplied Items

1. Transformer and cables

2. Lubricants and thermal oil

3. Foundation materials (sand, stone, cement)

4. Power supply system (3-phase 4-wire)

5. Lightning rod

Main Outsourced Components

• PLC: Siemens

• Weighing instruments: Zhimei

• Electrical components: Schneider

• Burner: FRD

• Screen mesh: Beijing Hongxing

• Pneumatic components: Shanghai Xinyi

• Air compressor: Kaishan

• Sensors: Ruima

• Bearings: Timken

• Motors & reducers: Guomao

• Asphalt tanks: Shandong Wucheng

• Asphalt pumps: Zhejiang Qingtian

Tools Supplied with Equipment

(Translated list, no table)

• Double-end box wrench set (1 set)

• Double-end open wrench set (1 set)

• Adjustable wrench 36×300 mm (1 pc)

• Adjustable wrench 55×450 mm (1 pc)

• Steel pliers 200 mm (1 pc)

• Pipe wrench 45×350 mm (1 pc)

• Flat file 250-II (1 pc)

• Flat screwdriver 200×8 mm (1 pc)

• Phillips screwdriver 200×8 mm (1 pc)

• Electrician screwdriver 100×5 mm (1 pc)

• Hammer 0.5 kg (1 pc)

• Sledgehammer 8.2 kg (1 pc)

• High-pressure grease gun (1 pc)

• Oil pot 1 kg (1 pc)

Note: Final configuration is subject to actual delivered equipment.

Environmental Protection System (LB4000)

1. Mixing Tower Dust Extraction System

• Dust extraction ducts and axial fans installed around mixer discharge area

• Asphalt fumes extracted and sent to photocatalytic plasma purifier

• Enclosed 15 m truck passage with fast rolling doors to prevent fume leakage

(Your material list and diagrams are translated into descriptive text)

2. Cold Aggregate Dust Extraction System

• Cold bins and inclined belt fully sealed

• Additional baghouse with ~500 bags

• Each bin equipped with automatic butterfly valve

• Dust extracted and sent to dedicated baghouse

Installation & Commissioning

Free installation and commissioning provided by the manufacturer.