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Guangdong GRVNES Environmental Protection
Technology Co., Ltd. All rights reserved.
GRVNES Environmental Protection
ADD: No. 18 Dongsheng Road, Shilong Town, Dongguan City,
Guangdong Province
TEL: 86-769-89957788
FAX: 86-769-86101550
E-MAIL: greenvalley@dglvgu.com
Industrial furnace treatment
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Technology Introduction
Technical advantages
Selective Catalytic Reduction (SCR) controls the NOx in diesel exhaust, using NH3 or urea (usually using a 32.5% urea aqueous solution) as a reducing substance, and the O2 concentration is higher than the NOx concentration by more than two orders of magnitude. Under certain temperature and catalyst, NOx is reduced to N2 and H2O by NH3. Since NH3 selectively reduces NOx preferentially without first reacting with O2, it is called "selective catalytic reduction".
For the excess NH3, a certain proportion of ammonia slip catalyst (ASC) is coated on the end of the SCR carrier to ensure that NH3 reacts with O2 to form N2 and H2O, so as to avoid secondary pollution caused by NH3 leakage.
The exhaust temperature of the diesel engine or the gas engine is generally in the range of 300 ° C to 500 ° C, which satisfies the temperature conditions required for the medium temperature catalytic reaction. If the exhaust temperature after the vortex is higher than 500 ° C, the high temperature catalyst should be considered, and the system cost will have a certain proportion. Rise.