Catalytic flue gas desulfurization and nitrogen oxide control
Thread Content
Recently, the levels of nitrogen oxides have been a bit high. The properties of the raw materials haven’t changed much, and control is achieved by adding denitration additives; however, the effect is slow to appear. How do others manage this issue?
The best solution is to install a new out-of-stock removal device; the next option is to lower the temperature for regeneration and coking, but this is difficult to control
That is, it’s really difficult to lower the bed temperature to a micro-afterburning state. Can ozone denitration still be used? Isn’t it supposed to be banned because of ozone pollution?
There is no ban yet; to reduce emissions, only the use of denitration agents is considered
How do you add the denitration agent, and what is the average amount used? We’re adding over 100 kilograms per day here, but the results aren’t very good. It’s barely kept within the limits.
We’ve been using it for almost two months now, and the results are still remarkable! If the raw materials cannot be changed, keeping the bed temperature lower is beneficial for the flue gas emissions. At the same time, the valve can also be opened wider to increase the catalyst circulation rate, allowing N to be carried away with the product rather than entering the regenerator. It’s not the case that the main air flow should be as low as possible; our nitrogen oxide levels have risen again these past few days. We adjusted the main air flow yesterday, and during that adjustment we observed a clear downward trend in NOX levels.
It’s better to install desulfurization and denitration equipment; it has significant advantages. First, it can adapt well to various raw materials, and second, it enables compliance with environmental regulations by ensuring emissions meet the required standards. Survival of the fittest – the refining industry will still undergo restructuring. Small-scale facilities and companies that do not meet environmental standards should be reorganized to meet the requirements of the new situation
Where is the denitration agent coming from? If it’s not suitable, switch to another supplier. It’s best to control the total nitrogen content in the raw materials; if that’s not possible, consider using low-temperature denitration methods. Other approaches won’t work
Adding a denitration agent is not something that can be done in just a few days. Over time, the NOX content will continue to decrease
How do I adjust the main air volume? Our processing capacity is around 178 tons per hour, with an air flow rate of about 15 W.
I’m about to start, but I’m not sure if it will be convenient to make modifications later on.