What are the uses of carbon denitrification catalysts?
Publishdate：2020-10-27 Views：15
1. Use
Denitration catalyst manufacturer: The use of carbon denitration catalysts is the same as other methods. It will react with NOX in the flue gas under the action of a catalyst to generate N2 and H2O, and enter the low-level environmental treatment process together with the flue gas, and meet the emission standards through the chimney. By setting up NOX online analyzers and pressure and temperature measuring instruments, the catalyst can be automatically adjusted; Packaging and storage: 25kg or 50kg peritoneal woven bags with a storage period of six months should be stored separately from strong oxidants and edible chemicals, and attention should be paid to moisture and rain prevention. This product is not a hazardous chemical and can be transported as general cargo by road, rail, and air.
2. Application of carbon denitrification catalysts:
1. Power station
In order to control the total amount of NOX emissions, the standard GB13223-2011 stipulates that, except for a few furnace types, the NOX emissions of coal-fired power generation boilers must be less than 50mg/Nm3 (calculated as NO2). Reducing nitrogen oxide emissions faces enormous challenges. The average desulfurization and denitrification efficiency of the SNCR system currently installed is only about 30%, rarely exceeding 40%. Even with the use of low NOX combustion SNCR technology, the final NOX emissions are still as high as 200 mg/Nm3 or higher. Existing desulfurization and denitrification methods need to be installed. Expensive SCR desulfurization and denitrification equipment can be used. For example, a coal-fired power plant boiler of a 600MW unit adopts low NOX combustion SNCR technology, and its NOX emission concentration still reaches 200 mg/Nm3.
2. Glass furnace
At present, according to the requirements of the national standard GB26453-2011, the NOx emissions of newly built flat glass industrial kilns after 2014 need to be less than 700 mg/Nm3 (calculated as NO2). A new factory uses fuel. When pure oxygen combustion is not used, the NOX emissions in the flue gas reach 2100 mg/Nm3. When using pure oxygen combustion, the NOX emissions in the flue gas still reach 1500 mg/Nm3. Below 700 mg/Nm3 (calculated as NO2) The standards are still very distant. The existing technology can only use SCR for desulfurization and denitrification, which not only requires dust removal, dechlorination and desulfurization, but also expensive desulfurization and denitrification catalysts.
3. Coal
The outlet flue gas temperature of the coal-fired industrial boiler furnace is 1060 ℃, with a residual air coefficient between 1.50 and 1.55. Brown coal is burned and equipped with a waste oil nozzle. The initial concentration of NOX in the flue gas is about 400-500 mg/Nm3. Effective desulfurization and denitrification measures have been taken without affecting the operation of waste heat boilers.
4. Sintering
The NOX in the smoke exhaust of the newly built sintering furnace is often higher than 400 mg/Nm3, which does not meet the requirements of the new standard for nitrogen oxide emissions not exceeding 300 mg/Nm3. The traditional desulfurization and denitrification method currently lacks an economically effective De-NOX control method, except for adding additives such as urea and lime to the sintered material. However, using SCR technology results in high investment and operating costs. Using desulfurization and denitrification catalysts for efficient catalysis, on the basis of existing sintering furnaces, the wind direction not only reduces NOX emissions by more than 50%, but also achieves a reduction of over 30% in PCDD/Fs. If combined with exhaust gas circulation desulfurization and denitrification, further improve the emission reduction effect of NOX.
5. Special carbon denitrification catalyst for incinerators
Denitration catalyst manufacturer: The waste burned in the grate type garbage incinerator contains a large amount of leather waste and fabric waste. When no measures are taken, the emission concentration of NOX is between 350 and 450 mg/Nm3; In most cases, it is around 400 mg/Nm3; The temperature in the upper part of the furnace is between 920 and 1090 ℃, and the smoke temperature before the steam superheater is between 580 and 602 ℃. The excess air coefficient at the furnace outlet is between 1.6 and 1.7. The method of using desulfurization and denitrification catalysts achieves a desulfurization and denitrification efficiency of over 90%. The emissions are completely up to standard, and there is no NH3 leakage in the flue gas.
1. Use
Denitration catalyst manufacturer: The use of carbon denitration catalysts is the same as other methods. It will react with NOX in the flue gas under the action of a catalyst to generate N2 and H2O, and enter the low-level environmental treatment process together with the flue gas, and meet the emission standards through the chimney. By setting up NOX online analyzers and pressure and temperature measuring instruments, the catalyst can be automatically adjusted; Packaging and storage: 25kg or 50kg peritoneal woven bags with a storage period of six months should be stored separately from strong oxidants and edible chemicals, and attention should be paid to moisture and rain prevention. This product is not a hazardous chemical and can be transported as general cargo by road, rail, and air.
2. Application of carbon denitrification catalysts:
1. Power station
In order to control the total amount of NOX emissions, the standard GB13223-2011 stipulates that, except for a few furnace types, the NOX emissions of coal-fired power generation boilers must be less than 50mg/Nm3 (calculated as NO2). Reducing nitrogen oxide emissions faces enormous challenges. The average desulfurization and denitrification efficiency of the SNCR system currently installed is only about 30%, rarely exceeding 40%. Even with the use of low NOX combustion SNCR technology, the final NOX emissions are still as high as 200 mg/Nm3 or higher. Existing desulfurization and denitrification methods need to be installed. Expensive SCR desulfurization and denitrification equipment can be used. For example, a coal-fired power plant boiler of a 600MW unit adopts low NOX combustion SNCR technology, and its NOX emission concentration still reaches 200 mg/Nm3.
2. Glass furnace
At present, according to the requirements of the national standard GB26453-2011, the NOx emissions of newly built flat glass industrial kilns after 2014 need to be less than 700 mg/Nm3 (calculated as NO2). A new factory uses fuel. When pure oxygen combustion is not used, the NOX emissions in the flue gas reach 2100 mg/Nm3. When using pure oxygen combustion, the NOX emissions in the flue gas still reach 1500 mg/Nm3. Below 700 mg/Nm3 (calculated as NO2) The standards are still very distant. The existing technology can only use SCR for desulfurization and denitrification, which not only requires dust removal, dechlorination and desulfurization, but also expensive desulfurization and denitrification catalysts.
3. Coal
The outlet flue gas temperature of the coal-fired industrial boiler furnace is 1060 ℃, with a residual air coefficient between 1.50 and 1.55. Brown coal is burned and equipped with a waste oil nozzle. The initial concentration of NOX in the flue gas is about 400-500 mg/Nm3. Effective desulfurization and denitrification measures have been taken without affecting the operation of waste heat boilers.
4. Sintering
The NOX in the smoke exhaust of the newly built sintering furnace is often higher than 400 mg/Nm3, which does not meet the requirements of the new standard for nitrogen oxide emissions not exceeding 300 mg/Nm3. The traditional desulfurization and denitrification method currently lacks an economically effective De-NOX control method, except for adding additives such as urea and lime to the sintered material. However, using SCR technology results in high investment and operating costs. Using desulfurization and denitrification catalysts for efficient catalysis, on the basis of existing sintering furnaces, the wind direction not only reduces NOX emissions by more than 50%, but also achieves a reduction of over 30% in PCDD/Fs. If combined with exhaust gas circulation desulfurization and denitrification, further improve the emission reduction effect of NOX.
5. Special carbon denitrification catalyst for incinerators
Denitration catalyst manufacturer: The waste burned in the grate type garbage incinerator contains a large amount of leather waste and fabric waste. When no measures are taken, the emission concentration of NOX is between 350 and 450 mg/Nm3; In most cases, it is around 400 mg/Nm3; The temperature in the upper part of the furnace is between 920 and 1090 ℃, and the smoke temperature before the steam superheater is between 580 and 602 ℃. The excess air coefficient at the furnace outlet is between 1.6 and 1.7. The method of using desulfurization and denitrification catalysts achieves a desulfurization and denitrification efficiency of over 90%. The emissions are completely up to standard, and there is no NH3 leakage in the flue gas.
