Method for preparing Fe-based catalyst through pyrolysis of dewatered sludge containing iron conditioner

The invention discloses a method for preparing a Fe-based catalyst by pyrolyzing dewatered sludge containing an iron conditioner. The method comprises the following steps: step 1, preparing the dewatered sludge; 2, adding an iron-containing conditioner into the dewatered sludge prepared in the step 1; 3, carrying out a pyrolytic reaction; 4, collecting and purifying the Fe-based catalyst; 5, testing the performance of the purified Fe-based catalyst; and 6, optimizing and improving the operation of the first four steps according to the test result of the fifth step. After the Fe-based catalyst is collected and purified, the performance of the purified Fe-based catalyst is tested, the crystal structure, the morphology, the particle size and the surface chemical property of the catalyst can be obtained through the tests, and finally, the preparation reaction parameter conditions are adjusted according to the property displayed by data in combination with the production requirement. In this way, the optimal produ