Sccessful Application of Ultra-low NOx Emission Technology
Release Time：04/23/2020
From June to November 2019, CDI undertook on turnkey
basis the upgrading of ultra-low NOx emission of one 2500TPD production line
and two 4800TPD production lines for Wu’an Xinfeng Cement Company. Since the
upgrading was completed and put into operation, the NOx emission has been kept
under 30mg/Nm3, ammonia slip less than 3ppm and the ammonia to
nitrogen ratio stablized within 1.05.
This upgrading project has adopted the three-stage
composite denitration technology composed of “staged combustion in calciner +
SNCR + SCR”, among which the SCR denitration technology, specifically targeting
the exhaust gas of cement production line with high dust and high harmful
ingredients, has effectively remedied, by using the process technology of “high
temperature and medium dust content”, such technical problems of the cement
production line as short lifetime of denitration catalyst and lower denitration
efficiency after a long-period running. The actual operation figures have shown
that the operation resistance of the whole SCR system is less than 800Pa and
the temperature of the exhaust gas drops less than 10°C.
The fact of 6-month continuous stable running of the 3
sets of SCR denitration system of Wu’an Xinfeng Cement Company has demonstrated
the maturity of CDI’s ultra-low NOx emission technology with “staged combustion
in calciner + SNCR + SCR” as its core, and such technology will definitely have
a broad prospect.