Reasons for ammonia blocking denitration spray gun-chapter 2

Ammonia blocking the spray gun may be caused by the following reasons

Phenomenon: One is left or right.

Reason for.

A. The fan control hole on the side of the air cap is blocked

B. The air cap is damaged. When using ammonia spray gun, it is necessary to spray corrosive reducing agent to the area between 850 ℃ and 1050 ℃ in the boiler furnace, so it is necessary to use corrosion-resistant and high-temperature materials.

Solution.

A. Clean atomizing cap

B. Replace the atomizing cap.

Phenomenon 2: the center of spraying amplitude is too thick. The processes of SCR and SNCR denitrification systems are not very different, except that the SCR reaction temperature is lower than that of SNCR due to the use of catalyst. However, from the perspective of construction cost and operation cost, SCR investment is at least several times, or even more than 10 times, that of SNCR. (Allen Bradley 1769-IQ32 Compact I/O Module, B&R X20A04622 Analog Output Module, Allen Bradley 1769-PA4 CompactLogix Power Supply)

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