Single-stage Coal Gasifier

Single-stage coal gasifiers are core pieces of equipment for clean coal gasification in industry. Using coal or coke as raw material and a mixture of air and steam as gasifying agent, they produce mixed gas through layered reactions inside the furnace. They are widely used for heating, calcination, drying and other processes in building materials, metallurgy, chemical engineering, environmental protection and other industries. Featuring simple structure, moderate cost and convenient operation, they provide cost-effective thermal energy solutions for SMEs and renovation projects.

Core Structure and Working Principle

The single-stage gasifier consists of furnace cover, water jacket, grate, base plate, air inlet box and other key components, adopting an overall water jacket structure for both safety and high efficiency. The furnace cover is lined with refractory and thermal insulation castable to ensure heat insulation and structural stability. The water jacket is equipped with a natural circulation system, and the self-produced steam directly participates in the reaction as gasifying agent, reducing energy consumption and improving gasification efficiency.

The interior is divided into drying layer, carbonization layer, reduction layer, oxidation layer and ash layer. After pretreatment, raw materials are fed from the top, and gasifying agent is evenly introduced from the bottom. Coal is fully burned in the oxidation layer to release heat, creating conditions for the reduction layer, finally generating crude gas containing CO and H₂ discharged from the top.

Technical Advantages

1. High efficiency and controllable cost: Compact layout, lower investment than two-stage gasifiers. Outlet gas temperature reaches 400–550℃ with high heat utilization, greatly cutting fuel costs.

2. Easy operation and maintenance: Equipped with mechanical coal feeding and wet ash removal, stable grate and rotating ash pan to avoid deflection and failures.

3. Wide coal adaptability & environmental protection: Suitable for anthracite, non-caking bituminous coal, coke, etc. Wet dust removal and multi-stage purification reduce dust and tar emissions to meet industrial environmental standards.

4. Safe and stable operation: Water jacket and water seal prevent gas leakage. Instrument control system monitors pressure, temperature and flow in real time for long-term reliable running.

Typical Applications

- Building materials: cement calcination, refractory drying, brick and tile firing

- Metallurgy: metal heat treatment, aluminum melting furnaces, copper refining furnaces

- Chemical & environmental protection: chemical heating furnaces, boiler gasification reforming, sludge drying

- Others: ceramic kilns, hot-dip galvanizing furnaces, annealing furnaces

Selection and Service

We supply single-stage coal gasifiers with a gas output range of 230–7000 Nm³/h, customizable according to coal consumption and process requirements. Each unit is strictly tested before delivery with complete purification systems and automatic consoles.

We provide one-stop services including on-site survey, design, installation and commissioning, together with operator training, maintenance guidance and spare parts supply.

With high cost performance and stable performance, single-stage coal gasifiers are an ideal choice for clean gasification projects, helping enterprises reduce costs, improve efficiency and achieve green production.