Nitrogen oxygen low nitrogen transformation | low nitrogen transformation of gas fired boiler (denitration)
China has increasingly strict requirements on environmental protection, and has established many targeted policies. Driven by the current environmental situation, many cities in China have begun to transform gas fired boilers, glass kilns, cement kilns, glass kilns and other kilns with low nitrogen. How to carry out low nitrogen transformation for gas fired boiler?
At present, due to the urgency and abruptness of the policy, many gas boiler users are still in a wait-and-see state. We provide the following high-quality transformation schemes for users of gas fired boilers:
1、 We can not modify the boiler body, which will not affect the thermal efficiency of the boiler.
The boiler can operate stably under any load, and its emission standard is controlled below 3mg/M3. There is no hidden danger or CO exceeding the standard. For gas-fired boilers, nitrogen oxides are mainly generated by oxidation of nitrogen in the air at high temperatures. The NOx thus generated is called thermally induced NOx. Its generation is a function of temperature of flame structure. SCR treatment does not need to modify the boiler body, only for tail gas treatment;
2、 Reduce operation cost by changing flue sequence.
By further utilizing the waste heat in the final exhaust gas of the boiler, part of the heat of the purified gas is recycled, and the operation cost of post-treatment is reduced.
3、 Simple installation
Only part of the pipeline needs to be modified and directly connected for use. The commissioning cycle is short, which does not affect the correct application of the boiler.
4、 Electronic control and electronic injection system
According to the real-time state of exhaust gas, the injection amount of urea water (ammonia water) is accurately controlled through the ECU system to achieve a high purification rate of nitrogen oxides, while placing ammonia to escape.