Is it okay not to operate environmental protection facilities when pollutants are discharged up to the specified standards?
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Circulating fluidized bed boilers are equipped with SNCR denitration systems; when the load is at a moderate level, the nitrogen oxide emission concentration is well below the specified standards. In such cases, can the denitration system be turned off? **Are there any regulations in this regard? Looking for a solution? Thank you!
Indeed, it’s already far below that level; so maybe denitration isn’t necessary? Theoretically, **only meeting the standards should be required.
But there are no clear regulations allowing it to be turned off; the environmental protection authorities require it to be in operation during inspections. I’m very conflicted about this – keeping it running is a waste, so what should I do?
It can’t be stopped, not even if it’s just running in a pretend manner; otherwise, the environmental protection authorities will detect it and impose heavy fines.
It should be possible, but the environmental protection authorities do not approve it; if the facilities are not operating properly, it is considered a violation.
It seems that the people at the environmental protection agency also need to understand the manufacturing processes; when the load is moderate, neither too high nor too low, the nitrogen oxide emission levels are far below the specified standards. If the officials at the environmental protection agency are convinced by this fact, then they should allow the plant to stop operating. The key is: is this ‘moderate load, neither too high nor too low’ condition sustained throughout the day? Two days? Three days? Or longer time? Still adjust frequently?
If there is a CEMS system, there should be no problem; the main requirement is to meet emission standards, not to ensure the operation of the equipment.
I really do know the answer to this question. If your environmental impact assessment report mentions SNCR denitration facilities, then those facilities must be put into operation; otherwise, if it is discovered, the environmental protection authorities can impose penalties in accordance with the law. However, it is also possible to meet the requirements without operating those facilities, and in that case they can be shut down. The condition is that a formal application for shutdown, issued by the company itself, explaining the reasons for shutting them down, must be submitted to the local environmental protection authorities. Generally, the authorities will approve such an application, which essentially constitutes a legal way of shutting down the facilities. Do you understand? I have done this before, and it indeed achieved the desired result
To be honest, in circulating fluidized bed boilers, nitrogen oxide levels can exceed the limits only when the load is very low and the outlet temperature is low; in most cases, they remain within the 50–150 range.