Heavy duty scraper chain conveyor, trough type drag chain conveyor for bottom ash
Our Chain Conveyor, also named Scraper Chain Conveyor or Trough Type Drag Chain Conveyor, is a heavy-duty enclosed bulk material handling equipment designed for continuous transport of abrasive, dusty and high-wear bulk solids. This drag chain conveyor adopts a trough casing and circulating scraper chain as the traction component. Driven by the drive sprocket assembly, the scraper chain pushes materials forward inside the sealed trough, delivering materials to designated discharge points horizontally or at a small inclined angle.
This robust chain conveyor performs well under harsh working conditions. Its fully enclosed structure effectively suppresses dust escape and material spillage, helping plants meet environmental emission requirements. Wear-resistant liner options are available to extend service life when conveying highly abrasive media. Customised trough width, conveying length, chain material, drive arrangement and outlet positions can be tailored to match your process layout.
Widely used across waste-to-energy plants, cement factories, wastewater treatment facilities, mineral processing lines and pulp mills, our Scraper Chain Conveyor handles bottom ash, fly ash, clinker, grit, bark waste, wood shavings, pulp screen rejects and salt cake from pulp recovery boilers. As a reliable solution for ash and waste handling systems, this drag chain conveyor delivers stable long-running performance, low maintenance cost and easy access for routine inspection.
H2：Key Features
- Heavy-duty scraper chain design, built for abrasive bulk materials
- Fully sealed trough structure for this drag chain conveyor, low dust leakage
- Supports horizontal or slight inclined installation (0–15°)
- Replaceable wear liner optional to prolong service life of the chain conveyor
- Stable continuous operation, low failure rate and convenient maintenance
- Customised size, chain grade and drive unit based on process parameters
- Compatible with other bulk handling equipment including screw conveyors, bucket elevators and bottom ash extractors
H2：Working Principle
Our Chain Conveyor (Trough Type Drag Chain Conveyor) consists of drive unit, tension take-up assembly, scraper chain, trough casing, inlet and outlet chutes. The circulating scraper chain is the core traction part. When the gear motor drives the sprocket, the scraper chain circulates inside the trough and pushes abrasive bulk materials forward continuously. Materials are discharged at required outlets. This scraper chain conveyor achieves enclosed dust-free conveying for ash, slag and pulp mill rejects.
H2：Applications
Our Chain Conveyor / Scraper Chain Conveyor serves multiple industries: ✅ Waste-to-energy plant: bottom ash & fly ash handling ✅ Cement plant: clinker, slag conveying ✅ Pulp & paper mill: recovery boiler ash, salt cake, bark waste, screen rejects ✅ Wastewater treatment plant: grit and sludge transport ✅ Mineral & biomass solid fuel handling
H2：Main Components of Drag Chain Conveyor
- Drive unit (gear motor + drive sprocket)
- Take-up / tension assembly
- Scraper chain assembly
- Trough casing and wear liner
- Inlet & outlet chutes
- Inspection access covers
H2：Technical Parameters
表格
| Item | Specification |
|---|---|
| Equipment Name | Trough Type Scraper Chain Conveyor / Drag Chain Conveyor |
| Conveying Capacity | Custom t/h |
| Conveying Length | Custom |
| Installation Angle | 0 ~ 15° |
| Material Contact Parts | Carbon steel / 304 stainless steel / Wear-resistant steel |
| Chain Type | Forged scraper chain |
| Suitable Materials | Bottom ash, fly ash, slag, clinker, grit, bark waste, pulp rejects, salt cake |
H2：FAQ
Q1: What is a chain conveyor?
A Chain Conveyor, also called Scraper Chain Conveyor or Trough Type Drag Chain Conveyor, is enclosed bulk material handling equipment. It uses scraper chains to push abrasive materials inside the trough for horizontal or low-angle conveying. This drag chain conveyor is popular for ash, slag and pulp mill waste handling.
Q2: What does a chain conveyor do in a pulp mill?
In pulp mills, our Scraper Chain Conveyor transports recovery boiler bottom ash, fly ash, salt cake, bark waste, wood shavings and screen rejects. This drag chain conveyor handles abrasive pulp waste and combustion residues in the alkali recovery and bark fuel system.
Q3: What materials can your scraper chain conveyor handle?
Our Chain Conveyor is suitable for abrasive bulk solids: bottom ash, fly ash, clinker, grit, bark waste, pulp rejects and salt cake. It is widely used for waste-to-energy, cement, pulp and water treatment bulk handling systems.
Q4: What are the advantages of this drag chain conveyor?
This chain conveyor features sealed trough design, dust containment, high wear resistance, stable running and easy maintenance. It can run continuously for long hours under harsh, high-abrasion industrial conditions.
Q5: Can you supply custom chain conveyor?
Yes. We customise the Scraper Chain Conveyor according to your material property, conveying capacity, length, installation layout and wear requirement. We can adjust chain material, liner and drive configuration for your pulp mill or WtE project.
Q6: What is the difference between a drag chain conveyor and a screw conveyor?
The drag chain conveyor (chain conveyor) is better for highly abrasive, large particle and contaminated materials such as slag, bark and pulp rejects. A screw conveyor is more fit for fine, less abrasive powder. Many bulk handling systems combine both types of conveying equipment.
H2：Custom Service
We provide custom scraper chain conveyor solutions to match your project requirements. Send us your material data, required capacity and layout drawing, and we will prepare a technical proposal and quotation for your drag chain conveyor.
H2：Related Products
- Screw Conveyor
- Bottom Ash Extractor
- Bucket Elevator
- Sludge Scraper
Contact us for technical drawings and quotation of your Chain Conveyor.
SELECTION & TECHNICAL QUESTIONS
Q1: How do I select the right conveyor model? What information should I provide?
> To recommend the most suitable solution, please provide the following details:
> 1. Material type: What material are you conveying? (e.g., fly ash, wood chips, biomass pellets, bottom ash, etc.)
> 2. Material properties: Particle size, temperature, moisture content, abrasiveness
> 3. Capacity requirement: How many tons per hour (t/h) do you need?
> 4. Installation conditions: Conveying distance, incline angle, space limitations
> 5. Application industry: Which industry is this for? (e.g., waste-to-energy plant, biomass power plant, cement plant)
> You can also email us or contact us via WhatsApp. Our engineers will get back to you within 24 hours.
Q2: What is the difference between screw conveyors and chain conveyors? Which one should I choose?
> Both types have different applications:
> – Screw Conveyors: Best for powdery and small-grain materials (e.g., fly ash, cement powder). Good sealing performance, simple structure, low maintenance cost.
> – Chain Scraper Conveyors: Best for bulky, highly abrasive materials (e.g., bottom ash, municipal solid waste, biomass fragments). Supports multiple inlet and outlet points.
> – Bucket Elevators: Ideal for vertical or steep-incline material lifting.
> If you are not sure, tell us your material and working conditions, and our engineers will help you choose.
Q3: Can your equipment handle high-temperature materials? What is the maximum temperature?
> We can customize equipment according to material temperature:
> – Standard type: 0~80°C, carbon steel
> – Medium temperature type: 80~200°C, thickened wear-resistant liner
> – High temperature type: 200~400°C, special heat-resistant steel, optional cooling jacket
> Please tell us your material temperature, and we will recommend the most suitable material solution.
Q4: Are there any limits on conveying distance and lifting height?
> Standard design range:
> – Screw conveyor: Single section up to 70 meters; multiple sections can be connected for longer distances
> – Chain conveyor: Single machine up to 60 meters
> – Bucket elevator: Lifting height up to 50 meters
> We can also customize for extra-long distances or special angles. Contact us for detailed solutions.
Q5: Do you provide explosion-proof design?
> Yes. For explosive and flammable conditions such as pulverized coal and biomass dust, we offer:
> – Explosion-proof motors (Ex d IIB T4 standard)
> – Reserved openings for explosion vents / rupture discs
> – Fully sealed structure to prevent dust leakage
> Please specify your explosion-proof rating requirements.
CUSTOMIZATION & MANUFACTURING
Q6: Do you support customization? What is the lead time?
> Over 90% of our equipment is customized according to customer working conditions. Standard models take about 90–120days. Special customizations take 120–180 days, depending on configuration complexity.
Q7: What material options do you offer?
> Common materials include:
> – Carbon steel (Q235B): Standard working conditions
> – Wear-resistant steel (NM400/NM500): Highly abrasive materials
> – Stainless steel 304/316L: Food, chemical, corrosion-resistant requirements
> – Bi-metal wear-resistant composite plate: Extreme abrasion conditions
> We will recommend the most cost-effective material solution based on your material properties.
Q8: What certifications do you have?
> We hold the following certifications:
> – ISO 9001:2015 Quality Management System
> – ISO 14001 Environmental Management System
> – ISO 45001 Occupational Health & Safety Management
> – CE Certification (EN 1090 Steel Structure)
> If you need scanned copies of specific certificates, please contact us.
DELIVERY & LOGISTICS
Q9: Which countries do you export to? Do you have export experience?
> Our equipment has been exported to more than 20 countries worldwide, including:
> – Europe: Germany, France, Poland, Turkey, etc.
> – Southeast Asia: Singapore, Thailand, Indonesia, Vietnam, etc.
> – Middle East: Saudi Arabia, UAE, etc.
> – South America**: Brazil, Chile, etc.
> We are familiar with the full export process: packaging, customs declaration, and ocean freight. We can provide FOB, CIF, and other trade terms.
Q10: What is your packaging method? Is it suitable for long-distance ocean shipping?
> Export-standard packaging:
> – Large items / complete machines**: Rust prevention + waterproof film + fumigated solid wood pallet
> – Precision components: Wooden case with shock-absorbing filling
> – Random accessories: Categorized packing with detailed packing list
> All wooden packaging meets IPPC fumigation standards for direct customs clearance.
Q11: What is your minimum order quantity?
> We do not have a strict minimum order quantity. Single-unit orders are welcome. Bulk orders can enjoy more favorable pricing.
INSTALLATION & AFTER-SALES
Q12: Do you provide installation guidance? Do engineers need to come to site?
> We offer two service options:
> 1. Remote guidance: Detailed installation drawings and operation manuals, video guidance for installation (free of charge)
> 2. On-site service: Dispatch engineers to site for installation and commissioning (travel costs are additional)
> Most customers choose remote guidance. Our equipment is designed as a modular structure for easy installation.
Q13: What is the warranty period? What are the wearing parts?
> Standard warranty period is 12 months (from the date of arrival at port).
> Wearing parts list:
> – Chain / screw flights: Approximately 1–3 years, depending on material abrasiveness
> – Liners: Approximately 2–4 years
> – Bearings: Approximately 2–3 years
> We recommend ordering a wearing-parts spare kit together with your first order.
Q14: How do you solve problems during operation?
> We provide 7×24 technical support:>
> – Response within 24 hours for technical issues
> – Remote video troubleshooting guidance
> – Engineer on-site service when necessary
> – Common spare parts in stock for fast delivery
QUOTATION & COOPERATION
**Q15: How can I get a quote? How long does it take?
> Quotation process:
> 1. You provide material parameters, capacity, installation conditions, and other requirements
> 2. Our engineers evaluate and select the appropriate model
> 3. Formal quotation and technical proposal provided within 7 working days
> You can contact us via email, or the online inquiry form.
Q16: What are your payment terms?
> Standard payment terms:
> – 30% advance payment: After contract signing, to start production
> – 70% balance: Before shipment, or against copy of Bill of Lading
For long-term cooperative customers, more flexible payment terms can be negotiated.
Follow these 3 steps to find your ideal conveyor solution
Step 1: Identify Your Material Type
Different materials require different conveyor designs. Tell us what you are conveying:
| Material Category | Examples | Recommended Conveyor Type |
| Powder / Fine Granules | Fly ash, cement powder, lime powder | Screw Conveyor |
| Small Granules / Pellets | Biomass pellets, plastic granules, grain | Screw Conveyor / Belt Conveyor |
| Fragments / Chips | Wood chips, bark, agricultural residues | Chain Scraper Conveyor |
| Bulky / Abrasive | Bottom ash, slag, MSW, clinker | Chain En-Masse Conveyor |
| Vertical Lift | Any bulk material needs vertical transport | Bucket Elevator |
Step 2: Define Your Working Conditions
Please prepare the following parameters before contacting us:
| Parameter | Why It Matters | Example |
| Capacity (t/h) | Determines conveyor size and power | 10 t/h, 50 t/h, 100 t/h |
| Conveying Distance (m) | Determines machine length | 15m horizontal, 30m incline |
| Incline Angle (°) | Affects capacity and design | 0° horizontal, 30° incline |
| Material Temperature (°C) | Determines material grade | Ambient, 150°C, 300°C |
| Moisture Content (%) | Affects discharge design | Dry, damp, wet (needs dewatering) |
| Abrasiveness | Determines liner thickness | Low, medium, high |
| Application Industry | Determines certification needs | Power plant, cement, mining, recycling |
Step 3: Choose Configuration Options
Based on your answers above, our engineers will recommend:
Material grade — carbon steel / wear-resistant steel / stainless steel
Sealing type — open trough / fully enclosed / gas-tight
Drive system — motor power, gearbox brand, speed range
Auxiliary options — explosion-proof motor, cooling jacket, cleaning device, level sensors
Not Sure Where to Start?
Send us your basic requirements, and our engineers will design a customized solution for you — completely free.
Email: bootec@bootecgroup.com Response time: Within 24 hours
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