Reciprocating(Step) Grate Boiler

Reciprocating Grate Water Tube Boiler - All-round Biomass Boiler Solution

The SZW reciprocating grate boiler, also known as stepped grate boiler, pusher grate boiler, mainly consists of boiler body and combustion equipment. Compared with other types of boilers, the reciprocating grate biomass boiler is specifically designed for various types of biomass fuels, especially suitable for high-moisture, low-calorific-value fuels.

It can minimize fuel costs and achieve high economic benefits; stable and efficient operation with water-tube structure; modular design makes installation and maintenance simple.

Highlights

High Fuel adaptability: Reduces fuel costs, and unaffected by fluctuations in a single fuel market.

High efficiency and reliability: Ensures continuous production and provides stable high-temperature, high-pressure steam.

Economical operation: Significantly saves investment and yields substantial long-term economic benefits.

Automation and intelligence: Reduces labor costs and operational complexity, and improves management efficiency.

Environmental compliance: Meets emission requirements and enhances the company's green image.

Working System

Details Advantages

High fuel adaptability

√ Wide Applicability - Specifically designed for various biomass fuels, it can efficiently burn various high-moisture, high-ash, low calorific value biomass fuels, such wood waste, woodchips, sawdust, palm shells, rice husks, bagasse, forest waste, etc.

√ No Size Limited - Supports various fuel forms such as flakes, blocks, chips, granules, powders, etc.

Advanced Combustion Technology

√ Three Step Burning Process - The grate has three burning zones "preheating + main combustion + burnout." Fuel goes through four steps – drying, pyrolysis, combustion, and burnout—on the moving grate, ensuring complete combustion and a combustion efficiency of ≥90%.

√ Smart Air Control - Multiple independent air chambers under the grate allow for precise airflow adjustment based on the combustion stage, effectively controlling the excess air coefficient and maximizing combustion efficiency.

√ Active Slag Breaking and Self-Cleaning - The reciprocating motion of the grate effectively breaks up surface slag and automatically removes ash, maintaining smooth grate ventilation and preventing a decrease in thermal efficiency due to slag buildup.

Stable and Reliable Operation with a High Degree of Automation

Water-tube Boiler Proper - The water-tube structure facilitates water circulation, resulting in high-quality steam, high safety, and the ability to withstand higher pressures. Also can produce high-temperature superheated steam(such as power generation and special drying).

Robust Grate Design - The grate bars are made of heat-resistant cast steel, ensuring a long service life and easy maintenance and replacement.

Wide Load Adjustment - The boiler can operate stably within a load range of 30%-110%, with rapid response, effectively adapting to fluctuations in production line demands.

Continuous and stable operation - The unique grate structure ensures uniform fuel delivery, supporting 24/7 uninterrupted operation.

Fully Automatic Control - Equipped with an advanced PLC or DCS control system, it achieves automatic feeding, automatic ignition, automatic air-fuel ratio adjustment, automatic ash removal, fault alarms and protection, greatly reducing reliance on operators.

Fault Monitoring - Real-time monitoring of operating parameters; automatic alarm and activation of protection programs in case of abnormalities.

Easy and Quick Installation, Saving Time and Effort

Modular Design - Boiler body, feeding system, and dust removal system are pre-assembled at the factory, reducing on-site work and shortening the installation cycle.

Simple Foundation Requirements - No special foundation is required; conventional concrete foundations are sufficient for installation.

Standardized Connection - Standard interfaces are provided for quick connection.

Easy Maintenance and Long Service Life

Few Easy-to-Break Parts - The grate is made of special heat-proof steel and can last 5 years or more.

Convenient Maintenance - Multiple inspection doors and observation holes allow for maintenance without shutting down the boiler.

Automated Ash Removal - Equipped with an automatic ash removal equipment, soot blower, effectively removing ash from the heated surface and maintaining long-term high-efficiency operation.

Extremely Low Emissions, Significant Social Benefits

Ultra-Low Emissions - Using clean burning inside boiler plus smoke cleaning system (cyclone, bag filter, wet washer). This makes: Dust in smoke ≤ 20mg/m³ NOx gas ≤ 150mg/m³. Meets environmental rules in most countries.

Turn Waste into Value - Changes biomass or forest waste into useful energy. Solves waste disposal problem and brings extra income. Supports green recycling economy.

Why Choose Yuanda Boiler?

Company Strength

■ Founded in 1956, a premium supplier assessed, certified, and inspected by SGS Group. Leading industrial boiler manufacturer in China.
■ Holds international boiler certifications: CE, ASME, DOSH, EAC, GOST, ISO
■ Over 17 years of export experience, gold-level supplier, ensuring payment and delivery.
■ Professional team integrating R&D, production, sales, and service.
■ 53,053㎡ Factory area, supporting video/VR factory audits or third-party inspections.
■ Engineers serving over 50 countries.
■ Products sold to over 130 countries/regions, covering food, beverage, textiles, paper, wood industries. Serving over 100,000 customers.

Products & Technology

■ Diverse Product Range: Fire-tube boilers, water-tube boilers, water-fire-tube boilers, combined boilers, vertical boilers, cogeneration boilers, waste heat recovery boilers, skid-mounted boilers, and mobile containerized boilers.
■ Flexible Fuels: Supports various fuels such as natural gas, biogas, lpg, diesel, heavy oil, dual fuels, coal, biomass, wood chips, sawdust, bagasse, wood residue, sawdust, forest waste, palm shells, hybrid biomass/gas, palm fiber, rice husks, walnut shells, electricity, etc.
■ Collaboration with advanced boiler research institutes ensures advanced technology and high energy efficiency.

Services & Markets

■ Local Projects: We have installed many boiler projects in different countries, can provide boiler case studies.
■ High Repurchase Rate: 55% of our customers are repeat customers or referral customers.
■ Local Support: We have long-term, reliable local agents, can provide one-stop service from installation and training to maintenance.
■ Comprehensive Service: From project planning to after-sales support, we provide comprehensive support throughout the whole boiler life, with 24/7 online support and immediate response.