Product Introduction of SNCR Denitrification Equipment for Ceramic Kilns:

      The SNCR denitrification equipment for ceramic kilns is a device that utilizes Selective Non-Catalytic Reduction (SNCR) technology to reduce nitrogen oxide (NOx) emissions in the flue gas of ceramic kilns. The following sections provide an introduction from the aspects of technical principles, equipment composition, technical features, and application effects:

     Technical Principles

      SNCR denitrification technology involves injecting a reducing agent containing NHx (such as urea, amine solution, etc.) into the furnace within a narrow temperature range of 850–1100°C. In the absence of a catalyst, the reducing agent rapidly decomposes or volatilizes into NH?, which then reacts with NOx in the flue gas, reducing NOx to N? and H?O, thereby achieving the goal of NOx removal. When using ammonia water as the reducing agent, the main chemical reaction is 4NH? + 4NO + O? → 4N? + 6H?O.

    Equipment Composition

• Amine Solution Receiving and Storage System: Used for receiving and storing the amine solution to ensure a stable supply of the reducing agent.
• Amine Solution Conveying System: Transports the amine solution from the storage tank to the injection device.
• Metering, Distribution, and Injection System: Precisely measures the injection amount of the amine solution and evenly sprays it into the appropriate location within the furnace.
• Automated Control System: Monitors and controls the entire denitrification process in real-time, automatically adjusting the injection amount of the reducing agent based on the NOx concentration in the flue gas.
• Safety Protection Facilities: Such as ammonia leakage detectors, emergency spray systems, etc., to ensure the safety of equipment and personnel.

    Technical Features

• Simple System: Does not require changes to the existing kiln equipment setup; only additional related equipment needs to be installed on the existing kiln, making the system structure relatively simple.
• Low Investment Cost: Since expensive catalysts are not required, the equipment investment and construction costs are relatively low, making it a more economical choice for enterprises with limited funds.
• Convenient Installation: The system mainly includes a reducing agent storage and conveying system, injection system, etc., making the installation process relatively easy and requiring minimal modification to existing equipment.
• Flexible Operation: Operation is relatively simple, and operators do not need a high level of professional technical expertise. The injection amount and location of the reducing agent can be flexibly adjusted based on actual NOx emissions.
• Small Footprint: Only requires small ammonia or urea storage tanks and conveying systems, which can be placed in open areas near the kiln, without occupying the compact space inside the kiln building.

Application Effects

• Denitrification Efficiency: The denitrification efficiency of SNCR technology generally ranges from 30% to 70%. For small ceramic kilns, it can reach up to 70% when combined with low-nitrogen combustion technology.
• Ammonia Slip Rate: The ammonia slip rate of SNCR technology is relatively high, typically between 5–10 ppm or even higher. This not only leads to waste of the reducing agent but may also cause the formation of ammonium salts in downstream equipment, clogging pipes and devices. However, by optimizing equipment design and operating parameters, the ammonia slip rate can be effectively reduced.