Part 1 — English Translation

LB3000+2000 Integrated Environmental Hot Recycling Asphalt Mixing Plant

Technical Specification

Heze Zhenhua Machinery Manufacturing Co., Ltd.

HEZE ZHENHUA MACHINERY MANUFACTURING LIMITED COMPANY

LB3000 Environmental Protection and Energy‑Saving Asphalt Mixing Plant

Technical Parameters

Section 1 — Overall Parameters of LB3000 Model

Production capacity: 240–360 t/h under rated working conditions with continuous feeding.

Fuel consumption: ≤6.5 kg per ton under rated conditions.

Rated working conditions include:

1. Aggregate moisture content: 3%

2. Finished material temperature: 140°C

3. Ambient temperature: 20°C

4. Working site altitude: below 1000 meters

5. Fuel type: heavy oil or natural gas with a calorific value of 9500 kcal/kg

6. Aggregate gradation entering the mixing equipment must be correct and compliant with specification requirements.

Measurement accuracy:

Aggregate: ±0.5%

Filler: ±0.5%

Asphalt: ±0.25%

Dust removal efficiency (after baghouse filtration):

Dust emission: <50 mg/Nm³

Ringelmann blackness: < Grade 1

Environmental noise: <70 dB(A), measured at 20 meters from the maximum noise source

Other parameters:

Total installed power: 900 kW

Total equipment weight: approximately 500 tons

Required site area: length 58 m, width 52 m

Section 2 — Component Parameters of LB3000 Model

Aggregate Feeding System (Primary Batching System)

Cold aggregate bins: five units

Each bin capacity: 10 m³

Feeding port size: 3.6 m (length) × 2.45 m (width)

Loading height: 2.32 m

1. A grating is installed at the feeding port to prevent oversized materials from entering the bin.

Belt feeders: five units

Belt size: 500 mm (width) × 2.79 m (length)

Production capacity:

Sand: 100 t/h

Aggregate: 100 t/h (aggregate size <40 mm)

Variable frequency motor:

Motor power: 2.2 kW

Adjustment ratio: 20:1

Accuracy: ±2%

Two bin‑wall vibrators installed on the sand bin walls

Motor power: 250 W

One collecting belt conveyor

Motor power: 5.5 kW (with reducer)

Belt width: 650 mm

Production capacity: 360 t/h

One inclined belt feeder

Motor power: 5.5 kW (with reducer)

Belt width: 650 mm

Production capacity: 360 t/h

Reclaimed material bins: two units

Each bin capacity: 10 m³

Feeding port size: 3.6 m × 2.45 m

Loading height: 2.32 m

Grating installed at feeding port to prevent oversized materials.

Reclaimed belt feeders: two units

Belt size: 500 mm × 2.79 m

Variable frequency motor:

Motor power: 2.2 kW

Adjustment ratio: 20:1

Accuracy: ±2%

Two bin‑wall vibrators installed on reclaimed sand bins

Motor power: 750 W

Environmental system:

Baghouse dust collector: 100 filter bags

Induced draft fan power: 15 kW

Axial fans and ducts: multiple sets

Section 2.1 — Drying Drum

Drum size: 2.5 m diameter × 10 m length × 16 mm thickness

Drive method: four friction‑drive support rollers

Drive motors: 4 × 22 kW (four reducer motors)

Insulation: 50 mm high‑temperature insulation felt with stainless steel outer cladding

Production capacity: 320 t/h

Temperature control:

Temperature measurement: thermal resistance sensor

Measurement error: <±5°C

Part 2

2.2 FRD‑JZ3000 Burner — Main Technical Parameters

Maximum output power: 20 MW

Maximum fuel consumption: 1700 kg/h

Output adjustment ratio: 1:4

Main fuel: diesel, heavy oil, or fuel oil

Ignition fuel: acetylene gas

Flame length: approximately 5.6 meters

Flame diameter: approximately 1.3 meters

Flame temperature: approximately 1300°C

Combustion efficiency: greater than 99%

Electrical power consumption: ≤30 kW

Compressed air consumption: ≤4.5 m³/min

Noise reduction method: reflective silencer

2.2.2 Air Compressor

Exhaust volume: 6 m³/min

Air pressure: 0.85 MPa

Motor power: 37 kW

2.3.1 Recycled Material Drying Drum

Drum diameter: 2200 mm

Drum length: 12.8 m

Inclination angle: 3.0°

Drive motor power: 4 × 15 kW

Operating temperature: 160°C

Maximum aggregate size: 40 mm

Rated production capacity:

At 1% moisture content: 180 t/h

At 3% moisture content: 120 t/h

The drying drum adopts a four‑wheel friction drive system. The transmission mechanism consists of motor → reducer → drive roller → large ring gear of the drying drum.

The drum support frame is welded from H‑shaped steel and bolted to the platform to form the required drum inclination. Four sets of friction support rollers with built‑in roller bearings are installed on the frame. Two sets of thrust rollers are installed on both sides of the drum ring at the feeding end to limit axial movement and ensure stable operation.

The drying drum is welded from steel plates. After materials enter the drum, they are first conveyed horizontally through the flame zone by guide vanes to prevent the formation of a material curtain. After passing through the flame zone, the materials enter a specially designed lifting blade and chain section, where they are evenly dispersed in curtain form to ensure full heat exchange with the hot flue gas generated by the burner, thereby increasing material temperature efficiently.

2.3.2 Burner for Recycled Material Drum

FRD‑JZ1500 Burner — Main Technical Parameters

Maximum output power: 15 MW

Maximum fuel consumption: 850 kg/h

Maximum gas consumption: 980 m³/h

Output adjustment ratio: 1:4

Main fuel: heavy oil or fuel oil

Main gas valve diameter: DN100

Ignition fuel: acetylene gas

Flame length: approximately 3.5 meters

Flame diameter: approximately 0.8 meters

Flame temperature: 1300–1800°C

Combustion efficiency: greater than 99%

Motor power consumption: 22 kW

Compressed air consumption: 3 m³/min

The burner control system allows remote automatic ignition and operating condition monitoring from the control room. It is equipped with automatic flameout protection, automatic fault diagnosis, and troubleshooting guidance to ensure safe and reliable burner operation.

2.3.3 Recycled Material Temporary Storage Bin

Storage volume: 6 m³

2.3.4 Recycled Material Weighing Bin

Volume: 2 m³

2.3.5 Weighing Method

Three‑point pressure load cell system

2.3.6 Discharge Door

Pneumatic operation

2.3.7 Environmental Sealing

Color steel plate enclosure

Section 3 — Screening, Weighing, and Mixing System

3.1 Hot Aggregate Elevator

Type: vertical, fully enclosed, double‑row ring chain, equipped with anti‑reverse brake motor

Lifting capacity: 360 t/h

Drive motor power: 30 kW (with reducer)

3.1.1 Recycled Material Elevator

Type: vertical, fully enclosed, double‑row ring chain

Lifting capacity: 180 t/h

3.2 Vibrating Screen

Type: high‑speed, inclined, five‑layer vibrating screen

Screening capacity: 360 t/h

Aggregate categories: five types

Drive motor power: 2 × 7 kW

3.3 Insulated Hot Aggregate Bins

Type: five‑compartment bin with 50 mm insulation layer

Total bin capacity: 80 tons

Material level detection: inductive level sensors

Temperature detection: sand bin equipped with temperature sensor

Additional features: overflow pipe installed

Control system: electric‑pneumatic discharge system with coarse and fine weighing for each aggregate type

3.4 Aggregate Weighing Hopper

Type: single hopper, four‑point pressure weighing

Weighing capacity: 4500 kg

Weighing system: four load cells with transport locking bolts

Additional features: maintenance access port in dust‑proof chamber

Control system: electric‑pneumatic discharge operation

3.5 Asphalt Weighing Hopper

Type: single hopper, insulated, heated by thermal oil, three‑point pressure weighing

Capacity: 300 kg

Weighing system: three load cells with transport locking bolts

Asphalt feeding method: gravity flow into mixer

Control system: electric‑pneumatic discharge

Additional feature: automatic asphalt overfill protection

3.6 Filler Weighing Hopper

Type: single hopper, sealed door, three‑point pressure weighing

Capacity: 400 kg

Weighing system: three load cells with transport locking bolts

Control system: electric‑pneumatic discharge

3.7 Weighing System Features

All weighing hoppers operate on independent sensor groups. Weight signals are transmitted to the control room via cables. Processed signals can be displayed digitally for manual operation or used for automatic control.

3.8 Insulated Mixer

Type: twin‑shaft paddle mixer with thermal‑oil‑heated mixing chamber

Rated mixing capacity: 4000 kg per batch

Drive motor power: 2 × 55 kW (with reducers)

Mixer production performance:

Mixing cycle: 45 seconds

Mixing capacity: 300 t/h

Part 3

Section 4 — Asphalt Supply System

System configuration: two standard asphalt storage tanks with indirect thermal‑oil heating and automatic temperature control, plus one asphalt mixing tank with indirect thermal‑oil heating and automatic temperature control.

4.1 Asphalt Storage Tanks

Quantity and capacity: three tanks, each with a capacity of 50,000 liters

Heating method: indirect heating through thermal‑oil coil heat exchangers

Insulation: thermal insulation layer with corrugated steel outer cladding

Liquid level detection: continuous level indicators

Mixing device: two mixers, one per tank

4.2 Asphalt Unloading Pit

Capacity: 1.6 m³

Type: screw pump with thermal‑oil insulation

Drive motor power: 5.5 kW

Pump body insulation: thermal‑oil heating

4.2 Asphalt Transfer Pump

Type: screw pump with thermal‑oil insulation

Flow rate: 35 m³ per minute

Drive motor power: 15 kW

Pump body insulation: thermal‑oil heating

4.3 Thermal Oil Heater

Model: RL130L.C

Burner: fully automatic ignition and monitoring, diesel temperature control, automatic protection

Heating capacity: 800,000 kcal/h

Maximum oil temperature: ≤260°C

Thermal oil circulation pump: high‑temperature centrifugal pump, flow rate 30 m³/h, pressure 1.6 MPa, motor power 5.5 kW

Control system: programmable computer control with automatic monitoring of temperature, oil circulation, oil level, and oil pressure; automatic alarm and burner start/stop

Thermal oil: supplied by user (supplier may recommend oil type based on operating temperature requirements)

Section 5 — Filler Supply System

System configuration: filler supply system installed within the tower frame, consisting of new filler silo, reclaimed dust silo, pneumatic discharge butterfly valves, screw conveyors for metering, pneumatic valves, and associated dust collection, safety, and control components.

5.1 New Filler Silo

5.1.1 Silo Body

Volume: 45 m³

Feeding method: pneumatic conveying from bulk powder truck via interface

Over‑pressure protection: automatic pressure relief device on top of silo

Level detection: inductive level sensors

Anti‑arching system: compressed‑air arch‑breaking device to ensure smooth powder flow

5.2 Reclaimed Filler Silo

5.2.1 Silo Body

Volume: 45 m³

Feeding method: elevator feeding

Over‑pressure protection: automatic pressure relief device on top of silo

Level detection: inductive level sensors

Anti‑arching system: compressed‑air floating device to improve powder flow

Excess dust handling: elevator return feeding, excess dust discharged after humidification

5.3 Screw Conveyors

Quantity: three units

Dimensions:

219 mm diameter × 4000 mm length × 7.5 kW

219 mm diameter × 3500 mm length × 5.5 kW

Section 6 — Dust Collection System

System type: primary gravity settling + secondary baghouse filtration

Primary dust removal performance: separation of dust particles ≥75 μm

Secondary dust removal performance: dust emission ≤50 mg/Nm³ (can reach 15 mg/Nm³ after aggregate washing)

Maximum air handling capacity: 147,000 m³/h at 115°C

Normal operating temperature: 100–150°C

6.1 Primary Dust Collector

6.1.1 Dust Collector

Type: gravity dust removal

Features: installed at the inlet of the secondary dust collector; equipped with wear‑resistant plates and adjustable guide plates to regulate settling particle size (typically ≥75 μm during operation). Dust is returned to the hot elevator via screw conveyor for reuse.

6.1.2 Screw Conveyors

Quantity: two units

Dimensions:

219 mm diameter × 4000 mm length × 7.5 kW

219 mm diameter × 3500 mm length × 5.5 kW

6.2 Baghouse Dust Collector

Type: atmospheric reverse‑pulse cleaning system

Filter bag material: latest NOMEX bags, 500 g/m², silicon‑treated for easy cleaning

Number of bags: 1120

Total filtration area: 1120 m²

Replacement method: top‑extraction

Cleaning method: electromagnetic pulse reverse blowing, group‑timed with adjustable intervals

Temperature monitoring: thermocouple with display, control, and over‑temperature protection

Adjustable airflow restrictor: multi‑blade type, remotely operated from control room

Pressure differential monitoring: differential pressure gauge with remote display, monitoring negative pressure at drum outlet

Structure: rainproof insulated enclosure with corrugated steel outer shell

Additional features: cage ladder, platforms, guardrails, and safety maintenance devices

6.2.1 Induced Draft Fan

Type: centrifugal

Power: 160 kW

Airflow: 74,000 m³/h at 115°C

6.2.3 Dust Recovery System

Return method: pneumatic conveying via elevator into reclaimed filler silo

Elevator motor power: 11 kW

6.2.4 Waste Dust Humidifier

Quantity: one unit

Power: 15 kW

Section 7 — Finished Material Silo

Type: bottom‑mounted silo

Capacity: 100 tons

Receiving corridor installed

Front and rear rolling doors with remote control

Photo‑oxygen ion treatment device for asphalt fume decomposition

System power: 22 kW

Axial fans and ducts: multiple sets

Part 4

Section 8 — Control System

System type: large‑screen LCD computer‑based control system, consisting of one LCD monitor for operation control and another LCD monitor for management functions.

Weighing and mixing control modes: manual, semi‑automatic, and fully automatic.

Power supply: 380 V / 220 V (±5%), 50 Hz, three‑phase four‑wire system.

8.1 Motor Control

Control method: circuit breaker with short‑circuit protection, overload protection, and contactor control

Operation method: push‑button operation with automatic protection

8.2 Weighing Control System

Weighing control: computer program control with color display

Functions include: automatic weighing, automatic correction of discharge deviation, asphalt over‑weigh protection, formula input, and printing output

8.3 Mixing Control

Control method: computer‑based automatic program control

Operation modes: manual, fully automatic, and manual input of mixing temperature

8.4 Burner Control

Control method: computer‑based automatic program control

Functions: automatic start, ignition, safety monitoring, and automatic fault protection

Section 9 — Paint Coating

9.1.1 Standard plant structure color: gray; dust collection system: silver‑white

9.1.2 If the user requires other colors, it must be specified at the time of order

User‑Supplied Items

The following items must be provided by the user:

1. Transformer and all cables required from the control room to the transformer. The supplier may provide reference cable specifications upon request.

2. Lubricating oil, grease, and thermal oil required for the equipment.

3. Sand, stone, cement, and other materials required for foundation construction.

4. Power system uses a single‑circuit three‑phase four‑wire supply. Any special requirements must be stated in the contract.

5. Lightning rod.

Section 10 — Main Configuration List for Asphalt Mixing Equipment

Cold aggregate feeding system includes:

Cold aggregate bins (Shandong Zhenhua), feeder motor reducers (Guomao), vibrating motors (domestic brand), frequency converters (Delta Taiwan), belts (Qingdao), flat belt conveyors (Shandong Zhenhua), and related reducers.

Drying drum system includes:

Drum manufactured by Shandong Zhenhua, drive motor reducers by Guomao, roller bearings and thrust bearings by TMK USA, and thermocouple sensors from Shanghai.

Burner system includes:

Heavy‑oil burner model FRD‑JZ3000 from Wuhan Furuidar, 50‑m³ heavy‑oil tank from Shandong Luhong, and ceramic fiber insulation materials.

Mixing tower system includes:

Aggregate elevator, reducer motors, chain wheels, ring chains, vibrating screen motors (Italy OLI Wolong), screen meshes (Beijing Hongxing), hot aggregate bins, pneumatic cylinders (Shanghai Xinyi), level sensors (Liaoyang), mixer reducers (Guomao), load cells (Ruima), and finished material silo (Shandong Zhenhua).

Dust collection system includes:

Induced draft fan (Jinan Chuangke), baghouse dust collector (Hebei Huanke), internal screw conveyors, waste dust humidifier, reducers, pneumatic cylinders, and thermocouples.

Filler storage system includes:

New filler silo, level sensors, butterfly valves, top dust collector, screw conveyors, reclaimed filler silo, waste dust elevator, reducers, ring chains, and screw conveyors.

Pneumatic system includes:

Screw air compressors and air tanks from Zhejiang Kaishan.

Central control system includes:

Control room (Shandong Zhenhua), Schneider electrical components, Lenovo computer and monitor, HP printer, AUX air conditioner, and cables from Liaocheng Yanggu.

Asphalt heating and storage system includes:

Three 50‑m³ asphalt tanks (Shandong Luhong), 800,000‑kcal thermal oil heater (Hebei), insulation materials, burner (RIELLO), asphalt pump (Wuxi Xunfeng), insulated valves, and unloading pump.

Environmental system includes:

Cold aggregate dust collection system with baghouse and fans (Hebei Huanke), main tower dust and fume extraction system with sealed discharge corridor, spray tower, plasma photo‑oxygen unit, axial fans, and 22‑kW induced fan.

Recycling system includes:

Recycled cold bins, feeder reducers, vibrating motors, frequency converters, belts, conveyors, elevator, reducer motors, chain wheels, ring chains, recycled drying drum, reducers, bearings, burner FRD‑JZ1500, recycled material storage bin, weighing hopper, load cells, and pneumatic cylinders.

Section 11 — Special Tools Supplied with the Equipment

The following tools are included with the asphalt mixing plant:

Double‑ended box wrench set, double‑ended open wrench set, adjustable wrenches (two sizes), pliers, pipe wrench, flat file, flat‑head screwdriver, Phillips screwdriver, electrician’s screwdriver, machinist hammer, sledgehammer, high‑pressure grease gun, and oil can.

Note: Actual supplied tools may vary due to technical improvements.

LB3000 Asphalt Mixing Plant Environmental Protection System

1. Main Tower Dust Extraction System

Dust extraction ducts and multiple axial fans are installed around the discharge doors to capture asphalt fumes and dust generated during material unloading.

The collected fumes are transported by the induced draft fan into the photo‑oxygen plasma treatment unit for purification.

A fully enclosed truck passage approximately fifteen meters long is added beneath the discharge area.

Fast‑acting rolling doors are installed at both the front and rear ends to prevent asphalt fumes and dust from escaping during unloading operations.

The enclosure structure is fabricated using square steel tubes and color‑coated steel sheets according to specified dimensions.

All components, including ducts, connectors, and panels, are manufactured from steel plates of designated thickness to ensure durability and airtight performance.

Materials for Enclosed Truck Passage

The enclosed passage is constructed using structural steel and color‑coated steel panels.

Materials include:

• 100×100 mm square tubes (4 mm thick), total length 220 meters

• 60×40 mm square tubes (3 mm thick), total length 210 meters

• Color‑coated steel sheets of various lengths (1 mm thick, 0.9 m wide), including 4.3 m, 4.05 m, 3.05 m, and 0.55 m panels

These materials form the sealed corridor that prevents fume leakage during truck loading.

Finished Material Silo Fume Collection System

A ring‑shaped duct is installed around the discharge area of the finished material silo.

Multiple axial fans extract fumes and dust generated during unloading.

The ducting system includes:

• Ring duct made from 3‑mm steel plate, 300×500 mm cross‑section, approx. 15 m long

• Connecting ducts, approx. 4.5 m long

• Axial fans, 380 V, 0.37 kW, total of 18 units

• Front and rear extraction ducts, approx. 3.5 m long

All ducts are fabricated from 3‑mm steel plates to ensure structural strength and airtightness.

Photo‑Oxygen Plasma Purification System

This system treats asphalt fumes through a combination of plasma ionization and ultraviolet photo‑oxidation.

It includes:

• Connecting duct 1: 300×500 mm cross‑section, approx. 1.5 m long

• Connecting duct 2: 800 mm diameter, approx. 6.8 m long

• Water tower

• Three expansion joints (800 mm diameter, 0.5 m long)

• Four elbows (800 mm diameter, 90°)

• Straight duct (800 mm diameter, approx. 3.8 m long)

• Photo‑oxygen purifier

• Induced draft fan, 22 kW

• Chimney connection duct: 430×500 mm, approx. 1.2 m long

• Chimney: 800 mm diameter, approx. 7.5 m long

All ducts are fabricated from 3‑mm steel plates.

2. Cold Aggregate Dust Extraction System

The inclined belt conveyor and cold aggregate bins are fully sealed to prevent dust leakage.

A dedicated baghouse dust collector with approximately one hundred filter bags is added to capture dust generated during cold aggregate feeding and handling.

Each cold bin is equipped with an automatic butterfly valve.

When the system detects that a loader is feeding material into a specific bin, the corresponding valve opens automatically.

Dust is extracted through ducts and conveyed into the dedicated baghouse for filtration.

Materials for Cold Aggregate Sealing System

The sealing structure is built using:

• 100×100 mm square tubes (4 mm thick), total length 118 meters

• 60×40 mm square tubes (3 mm thick), total length 148 meters

• Color‑coated steel sheets (1 mm thick, 0.9 m wide), lengths 3.1 m and 3.3 m

These materials form the sealed enclosure around the cold aggregate feeding area.

Cold Aggregate Dust Extraction Ducting System

Components include:

• Axial fans, 380 V, 0.37 kW, total of 16 units

• Multiple ducts of 500 mm and 600 mm diameter, fabricated from 3‑mm steel plates

• Butterfly valves (500 mm diameter)

• Pneumatic cylinders (QSC80×200)

• Baghouse dust collector

• Induced draft fan

• Chimney (700 mm diameter, approx. 7.5 m long)

All ducts, elbows, connectors, and chimneys are fabricated from 3‑mm steel plates.

Installation and Commissioning

The supplier provides free installation and commissioning of the entire environmental protection system, including:

• Main tower dust extraction system

• Cold aggregate dust extraction system

• Photo‑oxygen plasma purification system

• All associated ducting, fans, and sealing structures