Fin type SCR catalyst attachment skeleton structure and flue gas denitration system and method thereof

Abstract

The invention provides a fin type SCR catalyst attachment skeleton structure and a flue gas denitration system and a method thereof, and belongs to the technical field of low-temperature SCR denitration, the skeleton structure comprises: an outer box body, wherein each side wall of which is provided with a plurality of trapezoidal grooves formed by outward extrusion; an inner box body arranged in the outer box body, wherein each side wall of the inner box body is provided with a plurality of insertion grooves with openings in one ends; fin skeletons, wherein one end of each fin skeleton is inserted into the corresponding trapezoidal groove, the other end of each fin skeleton is inserted into the corresponding insertion groove, and the end parts of every two fin skeletons are fixedly connected through a pin; and two side walls of each fin skeletonare coated with an SCR catalyst; a plurality of baffle plates arranged at one end of the inner box body and used for fixing a plurality of fin skeletons. According to the system and the method, the normal-temperature air can be heated by using the molten salt solar condensation-heat storage system to overcome deactivation or poisoning of the SCR catalyst, and the flow speed of flue gas in the flue can be increased by increasing the flow speed of the high-temperature air.

Description

technical field [0001] The invention relates to the technical field of low-temperature SCR denitrification, in particular to a finned SCR catalyst attachment skeleton structure and a flue gas denitrification system and method. Background technique [0002] Selective Catalytic Reduction (SCR for short), as a mainstream technology widely used in thermal power plant flue gas denitrification at home and abroad, has very mature technical experience and high denitrification efficiency. The tail gas temperature of non-electric industries such as steel, glass, cement, and coking plants is also low. The industrial application of low-temperature SCR technology has become a current bottleneck. [0003] At present, the main technical difficulties of low-temperature SCR denitrification technology are as follows: one is the most widely used V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 The catalyst activity temperature is 300°C-400°C, while the temperature of the existing sintering flue gas, coke ove...

AI Technical Summary

Problems solved by technology

In addition, when the tail flue gas temperature is high (>290°C), the ammonia bisulfate poisoning of the catalyst will also be reduced, but the flue gas temperature in low-load thermal power plants or non-power industries such as steel and glass is not high. does not meet the operating requirements, and at low temperatures, SO 2 Extremely easy with NH 3 combined with subsequent further oxidation to generate ammonium bisulfate ((NH 4 )HSO 4 )

[0007] At present, the research focus of my country's scientific research institutes and universities is biased towards catalyst formulation development, reaction mechanism, catalyst poisoning and regeneration, etc. There are few studies on the molding and preparation process of monolithic catalysts, mainly relying on foreign technology Therefore, it is necessary to develop a new type of SCR denitrification catalyst skeleton mechanism and denitrification system and method to solve the problem of SCR catalyst activity failure and low temperature poisoning in the process of low temperature flue gas denitrification problems, and overcome the disadvantages of easy ash deposition at low flue gas flow rates (<3m / s)

Images