The dry denitrification system is a modern solution for reducing NOx emissions from industrial kilns, boilers and combustion processes. Unlike wet flue gas treatment, this dry process uses reductant powder pneumatically conveyed into the flue gas duct. It avoids water consumption and wastewater treatment, making it an ideal choice under strict emission regulations.

The core of the dry denitrification process is injection of powdered reducing agent into the hot flue gas at the proper temperature window. The reductant may be sodium bicarbonate, urea or a specially formulated powder. When dispersed in the gas stream, it decomposes and reacts with NOx to form nitrogen, water and small amounts of harmless salts. Uniform gas-solid mixing, precise dosage and sufficient residence time are essential for high efficiency.

Pneumatic conveying is the key technology used to transport stored powder through pipelines to injection lances. Compressed air or nitrogen carries the powder continuously, stably and adjustably. The system typically includes a roots blower, rotary feeder, mixing chamber, conveying pipe, injection lance and flow control valves. Powder can be delivered over long distances without losing flowability.

A complete dry denitrification system consists of a storage silo, discharge device, weighing and metering unit, pneumatic conveying system, distributor, injection nozzles, automatic control and monitoring instruments. A PLC or DCS controller monitors flue gas flow, NOx concentration, temperature and pressure, and automatically adjusts the powder feeding rate to keep emissions within limits.

The dry denitrification system offers clear advantages: low capital investment, simple operation, no water or wastewater treatment, and easy retrofitting to existing kilns and boilers. It can be combined with SNCR or SCR systems for deeper NOx removal. Maintenance is low, and the system handles variable load conditions well. The dry by-product can be captured by bag filters or electrostatic precipitators.

This system is widely used in cement kiln preheaters, glass melting furnaces, ceramic roller kilns, tunnel kilns, lime kilns, sintering machines, coal-fired boilers, biomass boilers and waste incineration plants. Since kiln flue gas conditions vary with fuel and process design, each pneumatic conveying and injection solution must be customized for the actual site.

When selecting denitrification reductant powder pneumatic conveying equipment, consider flue gas volume, initial NOx concentration, target limit, gas temperature, moisture, duct diameter, installation space and conveying distance. An experienced manufacturer designs conveying capacity, pipe size, gas velocity and nozzle layout to ensure even distribution. Proper particle size and surface treatment maximize reactivity and prevent blockages.

As a professional dry denitrification pneumatic conveying system manufacturer, we supply complete engineering design, equipment manufacturing, installation guidance, commissioning and after-sales support. Wear-resistant materials and reliable sealing components extend service life. Automatic purge and anti-blocking functions ensure safe, continuous operation.

The price of kiln flue gas denitrification conveying equipment depends on processing capacity, degree of automation, pipe length, material and custom requirements. Costs also change with the required NOx removal efficiency and whether the system includes a PLC control cabinet, online analyzer or remote monitoring. Customers can provide flue gas composition, temperature, flow rate and layout drawings for an accurate quotation.

With stricter air pollution standards, industrial enterprises need reliable and cost-effective denitrification technology. Our dry denitrification system helps customers achieve stable compliance, lower operating costs and cleaner production. Contact us to discuss your project and get a tailored engineering solution.