Low temperature scr reactor with online thermal analysis

Abstract

The invention discloses a low-temperature SCR reactor capable of on-line thermal analysis, comprising: a flue gas input pipe, a flue gas output pipe respectively connected to a main pipe, and at least one flat catalyst layer arranged inside the main pipe; a single-layer catalyst The layer includes catalyst module arrays, and each catalyst module array includes multiple rows of catalyst module groups, and each row of catalyst module groups includes a plurality of sequentially arranged catalyst modules; each row of catalyst module groups is equipped with an online thermal analysis device; each online thermal analysis The devices respectively include: a heating cover that is located above the corresponding catalyst module group and can be sequentially matched with each catalyst module in the catalyst module group, and an alignment drive device that drives the heating cover to align with each catalyst module in the catalyst module group in sequence, And a hot gas supply device for supplying hot gas for thermal analysis to the heating mantle. The low-temperature SCR reactor of the invention can perform online thermal analysis treatment on the catalyst module.

Description

technical field [0001] The invention relates to a low-temperature SCR reactor capable of on-line thermal analysis. Background technique [0002] SCR denitrification technology is the most widely used and most effective flue gas denitrification technology in the world, and its core is a catalyst. At present, the temperature window of catalysts used in the power industry is generally between 320 and 420°C. When the operating temperature is low, NH 3 will interact with SO in the flue gas 3 A side reaction occurs to generate ammonium bisulfate. Ammonium bisulfate is acidic and highly corrosive. It will also adhere to the surface of the catalyst and even block the micropore structure of the catalyst, resulting in a decrease in the denitrification efficiency of the catalyst. Ammonium bisulfate will also adsorb in the flue gas. Alkaline fly ash forms a paste-like substance, which further blocks the catalyst and further reduces the denitrification efficiency. [0003] The ammoniu...

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Problems solved by technology

[0004] However, non-electric industries such as iron and steel and coking are the main sources of NOx emissions. The exhaust gas temperature of these non-electric industries is often low, generally 120-300°C. During the denitrification process, ammonium bisulfate is easily formed on the surface of the catalyst, which makes the catalyst clogged and lost. activity, which reduces the denitrification efficiency of the catalyst, which limits the development of SCR technology

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