Basic introduction and system composition of pulverized coal industrial boiler

The pulverized coal industrial boiler is a highly efficient and clean combustion equipment that uses ultra-fine pulverized coal (usually with a particle size of 50-200 microns) as fuel. It achieves high thermal efficiency and low pollution emissions through advanced combustion technology and intelligent control systems. Its design concept combines the fuel adaptability of traditional coal-fired boilers with the environmental protection characteristics of gas-fired boilers, and is an important technical upgrade direction in the field of industrial heat supply.

1. Definition and core features

①Fuel form innovation

      Grinding raw coal into micron-sized coal powder greatly increases the specific surface area, significantly improves the combustion reaction rate, and reduces the loss of unburned carbon.

②Clean combustion technology

     Using low-temperature staged combustion, low-nitrogen burners and other means to inhibit the generation of pollutants, and cooperate with the tail purification device to achieve near-zero emissions.

③Intelligent control

     Integrating Internet of Things technology to achieve full automation of fuel supply, air volume adjustment, and temperature control, reducing manual intervention.

2. Working Principle and Process

①Fuel preparation stage

• After being crushed and dried, the raw coal enters the coal mill and is ground into coal powder of qualified fineness.
• The coal powder is stored in the explosion-proof warehouse through the pneumatic conveying system and accurately fed as needed.

②Combustion Process

• After the coal powder is mixed with the preheated air, it is sprayed into the furnace by the burner to form a turbulent flame, which burns efficiently at 1100~1300℃.
• Graded air distribution technology (primary air, secondary air, tertiary air) optimizes combustion conditions and reduces the generation of nitrogen oxides.

③Energy conversion

• The heat energy released by combustion is transferred to the working fluid (water/steam) through membrane water-cooled walls, superheaters and other components, with a thermal efficiency of over 92%.

④Environmental protection treatment

• The flue gas undergoes three-stage treatment in sequence: dust removal (bag/electrostatic precipitator), desulfurization (wet/semi-dry), and denitrification (SCR/SNCR), and the emissions are better than national standards.

3.System Components

Pulverized coal industrial boiler

4.Core Advantages

①Energy saving and economic efficiency

• The combustion efficiency is ≥98%, which saves 20%~35% coal compared with traditional chain furnaces, and the annual operating cost is significantly reduced.
• It is suitable for areas with low electricity prices or rich coal resources, and has outstanding energy cost advantages.

②Environmental protection compliance

• Emission indicators: particulate matter ≤10mg/m³, SO₂≤35mg/m³, NOx≤50mg/m³, meeting the ultra-low emission requirements in key areas.

③Operation flexibility

• The load adjustment range is wide (30%~110%), and it can be started and stopped within 15 minutes to adapt to fluctuating production needs.

④Fuel compatibility

• It can be mixed with derivative fuels such as biomass and sludge to help enterprises realize waste resource utilization.

Pulverized coal industrial boilers, through the technical route of "fuel micronization + clean combustion + intelligent control", have broken through the environmental bottleneck while retaining the economy of coal-fired power, becoming the mainstream choice for upgrading and replacing traditional industrial boilers. They are especially suitable for areas with insufficient natural gas coverage but high environmental pressure, providing a feasible green transition path for high-energy-consuming industries.(If you want to know more please click this sentence to contact our engineers)