Device and method for removing nitrogen oxides in adipic acid tail gas
A technology for nitrogen oxides and adipic acid, which is applied in the production of adipic acid, chemical instruments and methods, and separation methods, can solve problems such as adipate tail gas nitrogen oxide removal devices that have not yet been seen, and achieve improved removal efficiency. Eliminate efficiency, fast and accurate adjustment, ensure safe and stable effect
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Embodiment 1
[0024] see figure 1 , a device for removing nitrogen oxides in adipic acid tail gas, comprising a reactor 10, and also including an adipic acid tail gas discharge valve 1, a heater 4 and a gas mixer 6 connected sequentially along the pipeline, and the adipic acid The pipeline between the tail gas discharge valve 1 and the heater 4 is provided with a sampling point 2 before removal and an online concentration analyzer 3 before removal, and a feedstock is provided on the pipeline between the heater 4 and the gas mixer 6. Thermometer 5; the inlet of the gas mixer 6 is connected to the gas ammonia pipeline and the low-pressure nitrogen replacement pipeline, the gas ammonia pipeline and the low-pressure nitrogen replacement pipeline are arranged in parallel, and a gas ammonia discharge valve is arranged on the gas ammonia pipeline 16 and gas flow meter 15, on the low-pressure nitrogen replacement pipeline, a low-pressure nitrogen discharge valve 17 is arranged; on the pipeline betw...
Embodiment 2
[0028] Utilize the device of embodiment 1 to process the nitrogen oxides in the adipic acid tail gas, concrete steps are as follows:
[0029] ①The adipic acid tail gas nitrogen oxides are heated up to 200°C by a heater at a certain concentration and then transported to the gas mixer, wherein: the concentration of adipic acid tail gas nitrogen oxides is controlled between 100ppm and 2000ppm;
[0030] ② The catalyst in the reactor is activated and heated up: close the main valve of the reactor inlet and the main valve of the reactor outlet, the heating gas enters the reactor through the bypass valve of the reactor inlet, the catalyst is heated up and activated, and the heating gas passes through the venting pipeline After the valve is emptied, circulate to the adipic acid tail gas discharge valve for circulation treatment;
[0031] ③When the catalyst bed temperature reaches above 200°C, open the reactor inlet main valve and the reactor outlet main valve, and close the venting pi...
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