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- Title
630 MW 机组新型无毒催化剂烟气脱硝性能试验研究.
- Authors
肖 国 振
- Abstract
In the SCR system, the denitration efficiency is greatly affected by the performance of the catalyst . The V2O5 -WO3 / TiO3 catalyst which is widely used is not only expensive, but also the vanadium oxide in the catalyst after deactivation will cause serious pollution to the environment. Therefore, traditional catalysts need to be improved. The new non-toxic catalyst uses rare earth metal oxide as the active component, which can greatly reduce the degree of environmental pollution. In order to study the application effect of the new non-toxic catalyst in practical engineering, and taking unit 8 of the power plant as an example, the denitration efficiency, ammonia escape rate, and SO2 / SO3 conversion rate of the SCR denitration system of the unit were tested. Three operating loads of 360, 500, and 600 MW were tested, and sampling inspection was carried out on both sides of A and B under each operating condition. The test results show that the average denitration efficiency of the SCR denitration system under 3 operating loads is 82.31%, 76.81%, and 81.58% respectively, and the denitration efficiency of the single-layernon-toxic denitration catalyst is 52.34%, 55.34%, and 57.14% respectively, which are all greater than guaranteed value of 45%.Under the test load of 600 MW, the average SO2 / SO3 conversion rate of the newnon-toxic catalyst is 0.38%, which is less than the guaranteed value of 1%, and the resistance of the first-layer catalyst under the three loads is 96, 117.5 and 153 Pa respectively, which are both less than the guaranteed value of 200 Pa.The average ammonia escape concentrations are 1.26×10-6, 1.46× 10-6, and 0.52×10-6 respectively, which are less than the guaranteed value of 2.5×10-6. The NOx concentrations at the sides of the denitration system A and B at 360 MW are 38 and 46 mg/ m3.The NOx concentrations at the sides of the denitration system A and B at 500 MW are 21 and 28 mg/ m3. At 600 MW, the denitration system A, B The NOx concentrations at the outlets on both sides of B were 27 and 31 mg/ m3, respectively. Under all operating conditions, the NOx concentration in the flue gas on both sides of outlet A and B of the denitration system is lower than the requirements of ultra-low emission standards, and the new non-toxic denitration catalyst can meet the requirements of industrial applications. SCR non-toxic catalyst denitration rare earth catalyst.
- Subjects
RARE earth metals; RARE earth metal catalysts; VANADIUM; CATALYST poisoning; VANADIUM oxide; FLUE gases; NITROGEN oxides; AMMONIA
- Publication
Clean Coal Technology, 2019, Vol 25, Issue 6, p146
- ISSN
1006-6772
- Publication type
Article
- DOI
10.13226/j.issn.1006-6772.18110501