Coal & Biomass Fired Hot Water Boiler

Aix Boiler coal & Biomass fired hot water boiler operates based on the principle of layer combustion, three-pass fire-water tube heat exchange and closed cycle heating. Using coal, biomass pellets, sawdust, straw, rice husk, etc. as fuel, the fuel is fed into the furnace layer by layer through the grate and fully burned. High-temperature flue gas heats boiler water to 40℃–95℃ through radiation and convection heat exchange, and the circulating pump delivers hot water to end users for heating and domestic hot water supply. The product is available in three structures: atmospheric pressure, pressure and vacuum. The boiler is designed and manufactured in strict accordance with the standards of China Boiler and Boiler Water Treatment Association, GB/T 44906-2024 Technical Specifications for Biomass Boilers and TSG 11-2020, with thermal efficiency up to 88%–92%, low fuel cost, high safety and stability, and wide application range. As the main heating equipment of Aix Boiler brand, this product is independently developed, produced and inspected by the original factory with full-chain quality control. Adopting horizontal packaged structure, automatic feeding, automatic slag removal and intelligent temperature control technology, it is specially designed for central heating and hot water projects such as residential quarters, hotels, schools, hospitals, industrial parks and breeding greenhouses. It can fully replace traditional coal-fired boilers, helping users achieve low-cost heating, environmental compliance and stable operation.

1. Core Product Parameters (Aix Coal & Biomass Fired Hot Water Boiler)

2. Working Principle & Technical Core

Aix coal & biomass fired hot water boiler adopts a horizontal three-pass fire-water tube full wet-back structure, consisting of eight core parts: furnace body, chain grate, combustion system, smoke tube heating surface, economizer, feeding system, slag removal system and fully automatic control system. During operation, fuel is evenly spread on the grate through automatic feeder and enters the furnace for gradual drying, gasification and full combustion. High-temperature flue gas completes the first-pass radiation heat exchange from the furnace, then transfers to the second-pass threaded smoke tubes for enhanced convection heat exchange through the combustion chamber, then enters the third-pass plain tubes for heat exchange, and finally recovers waste heat through the economizer to reduce exhaust gas temperature and heat feed water to improve thermal efficiency. Boiler water is quickly heated in the heating surface tubes, delivered by circulating pump to end users for heating or hot water supply, and returns for reheating after heat release, realizing continuous constant temperature heating. Equipped with PLC intelligent control system, the boiler realizes automatic feeding, automatic ignition, automatic temperature control, automatic circulation, automatic slag removal and fault self-test alarm, truly unattended and stable operation.

3. Three Structure Types, Covering All Scenarios

Atmospheric Hot Water Boiler – Top Safety
Atmospheric operation, no explosion risk, simple structure, easy operation, low cost. Suitable for schools, hospitals, nursing homes, residential quarters and other places with high safety requirements, no inspection required, ready to install and use.

Pressure Hot Water Boiler – Industrial High Power
Pressure operation, can provide higher temperature hot water, large output, fast heating. Suitable for textile, printing and dyeing, chemical industry and other industrial production and large-scale central heating projects, high thermal efficiency and stable heating.

Vacuum Hot Water Boiler – High Efficiency & Long Life
Negative pressure vacuum inside, low boiling point of water, high heat exchange efficiency, no scaling, no corrosion, 50% longer service life than ordinary boilers. Suitable for high-end hot water projects such as hotels, guesthouses and bathing centers, saving 20%–30% energy.

4. Core Features & Original Factory Advantages

Wide Fuel Range, Extremely Low Operating Cost
Capable of burning coal, biomass pellets, sawdust, straw, rice husk and other fuels. Renewable and low-cost biomass fuel saves 40%–70% of operating cost compared with gas and Electric Boilers, greatly reducing enterprise burden.

High Thermal Efficiency, Remarkable Energy Saving
Three-pass enhanced heat exchange + threaded smoke tubes + economizer design fully absorbs heat, with thermal efficiency up to 88%–92%, 15%–25% more energy-saving than traditional boilers, greatly improving fuel utilization.

Fully Automatic Operation, Labor-saving
One-key start, automatic feeding, combustion, water supply, constant temperature, slag removal and ash cleaning. Supports remote monitoring, no frequent manual operation required, saving labor cost.

Safe & Reliable, Multiple Protections
Full-dimensional safety devices including over-temperature protection, water shortage protection, over-pressure protection, flameout protection, leakage protection. Designed and manufactured in strict accordance with national standards, safe operation guaranteed.

Compact Structure, Fast Installation
Delivered as horizontal packaged unit with pre-assembled furnace body, grate, control and pipelines. Only water, electricity and fuel connection needed on site, small footprint, suitable for new factories and old boiler renovation.

Strong Support from Original Factory
Aix Boiler independent R&D and production, no middleman price difference, transparent price, stable supply. Provides full-parameter customization and lifelong technical support, fast after-sales response.

5. Application Scenarios & Industry Solutions

With core advantages of low cost, high efficiency, stability and complete types, Aix coal & biomass fired hot water boiler is widely used in:

• Residential Quarters/Villas: Central heating, 24-hour domestic hot water

• Hotels/Bathing Centers: Room heating, bathing hot water, pool constant temperature

• Schools/Hospitals/Government Buildings: Heating, hot water, disinfection hot water

• Industrial Parks/Factories: Workshop heating, staff bathing, process hot water

• Farms/Greenhouses: Constant temperature heating, insulation heating

• Old Boiler Renovation: Replace coal-fired boilers to achieve environmental compliance and energy upgrading

6. Manufacturing Process & Quality Compliance

Aix coal & biomass fired hot water boiler adheres to standardized lean manufacturing in the original factory, strictly implementing national biomass boiler and special equipment safety specifications. Furnace body adopts high-quality boiler special steel plate, CNC cutting, automatic welding, welds qualified by X-ray flaw detection. Heating surface adopts 20# boiler seamless steel tubes, threaded smoke tubes for enhanced heat exchange, less ash accumulation and higher efficiency. Grate adopts heavy-duty chain grate, stable operation, high temperature resistance and not easy to deform. Front and rear arches are poured with refractory concrete, full combustion and long service life. Each boiler undergoes four strict tests before delivery: hydrostatic test, air tightness test, safety protection test and commissioning test. Only qualified products are delivered with complete certificates including boiler qualification, inspection report and operation manual, ensuring smooth acceptance and filing.

7. Operation, Maintenance & After-sales Service

To ensure long-term stable operation, users should use qualified fuel, regularly clean grate, smoke tube ash and furnace coking, check feeding, slag removal and water supply systems, operate in accordance with the instruction manual, prohibit overload operation. As the original factory of coal & biomass fired hot water boilers, Aix Boiler provides free on-site survey and scheme design, professional installation, commissioning and operation training, 12-month warranty and lifelong maintenance service, fast spare parts supply and emergency repair, regular return visits and system optimization upgrades, providing full protection for users.

8.Graphic introduction

Choosing Aix coal & biomass fired hot water boiler means choosing a modern heating solution with low cost, high efficiency and reliability. Welcome customers all over the world to contact us for negotiation and on-site inspection!