What should I do if the medium temperature denitration catalyst often gets clogged?
Publishdate：2020-12-03 Views：18
1. Adjusting the operation mode of steam soot blowing
From the damage at its hardened end, it can be seen that the blowing pressure of the steam soot blower is too high. The degree of damage can be reduced by reducing the blowing steam pressure and blowing frequency.
2. Reasonable use of sonic soot blowers
After the shutdown inspection, it was found that the dust accumulation on the side near the sonic soot blower was lighter than that on the side far away from the soot blower. It is recommended to install sonic soot blowers on both sides of the flue simultaneously, so that the vibration generated by the sonic soot blowers can evenly cover the entire flue.
3. Increase compressed air storage tank
The pressure of compressed air directly determines the blowing ability of the sonic soot blower to ensure the compressed air pressure of the sonic soot blower.
4. Improve the reliability of the refrigerated dryer
During operation, there is an abnormal sound from the acoustic soot blower of the medium temperature denitration catalyst. After inspection, it was found that there is a lot of moisture in the compressed air, which seriously affects the quality of the compressed air. In order to ensure the quality of compressed air, it is necessary to renovate the existing cold drying machine.
5. Maintenance of thyristor shutdown
After stopping the furnace and ammonia injection, use a steam soot blower to blow the floating ash on the grid plate. If the boiler needs to be shut down for a long time, insulation measures should be taken.
6. Control the flue gas temperature at the thyristor inlet
Denitration catalyst manufacturer: When the SCR system operates below the continuous operating temperature and above the low ammonia injection temperature, the system may produce ammonium bisulfate, which can easily cause blockage of the medium temperature denitration catalyst. Therefore, the flue gas temperature at the thyristor inlet should be controlled to ensure that the thyristor system operates between low and high operating temperatures.
1. Adjusting the operation mode of steam soot blowing
From the damage at its hardened end, it can be seen that the blowing pressure of the steam soot blower is too high. The degree of damage can be reduced by reducing the blowing steam pressure and blowing frequency.
2. Reasonable use of sonic soot blowers
After the shutdown inspection, it was found that the dust accumulation on the side near the sonic soot blower was lighter than that on the side far away from the soot blower. It is recommended to install sonic soot blowers on both sides of the flue simultaneously, so that the vibration generated by the sonic soot blowers can evenly cover the entire flue.
3. Increase compressed air storage tank
The pressure of compressed air directly determines the blowing ability of the sonic soot blower to ensure the compressed air pressure of the sonic soot blower.
4. Improve the reliability of the refrigerated dryer
During operation, there is an abnormal sound from the acoustic soot blower of the medium temperature denitration catalyst. After inspection, it was found that there is a lot of moisture in the compressed air, which seriously affects the quality of the compressed air. In order to ensure the quality of compressed air, it is necessary to renovate the existing cold drying machine.
5. Maintenance of thyristor shutdown
After stopping the furnace and ammonia injection, use a steam soot blower to blow the floating ash on the grid plate. If the boiler needs to be shut down for a long time, insulation measures should be taken.
6. Control the flue gas temperature at the thyristor inlet
Denitration catalyst manufacturer: When the SCR system operates below the continuous operating temperature and above the low ammonia injection temperature, the system may produce ammonium bisulfate, which can easily cause blockage of the medium temperature denitration catalyst. Therefore, the flue gas temperature at the thyristor inlet should be controlled to ensure that the thyristor system operates between low and high operating temperatures.
