High-temperature dust collection-desulfurization-denitrification integrated device and method of using same

Abstract

The present invention discloses a high-temperature dust collection-desulfurization-denitrification integrated device and a method of using the same, and relates to the technical field of environmentalprotection equipment. The high-temperature dust collection-desulfurization-denitrification integrated device has a main structure comprising a housing, a dust collecting bin, a filter element and a pulse dust-cleaning unit. High-temperature flue gas to be treated is fed into the housing together with an alkaline powder and an alkaline solution. The alkaline powder is capable of removing sulfidesin the flue gas that form calcium compound precipitate falling to the bottom of the housing. The alkaline solution is used for removing nitric oxides in the flue gas. Meanwhile, the filter element contains a catalyst, so that the nitrogen oxide treatment can be accelerated, and the influence of dust particles in the flue gas on the catalyst can be avoided. The alkaline powder adsorbed on the surface of the filter element can react with the sulfides in the flue gas again, thereby improving the desulfurization efficiency. At the same time of purifying the flue gas, the filter element is subjected to dust cleaning by means of the pulse dust-cleaning unit or a sonic wave dust cleaner, so that the normal function of the filter element is ensured. The dust in the flue gas and particulate mattersgenerated in the desulfurization process are captured on the surface of the filter element, fall to the bottom of the housing through dust cleaning, and finally are discharged together.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment, in particular to a high-temperature dust removal, desulfurization and denitrification integrated device and a method for using the same. Background technique [0002] In recent years, with the increase of smog weather in various places and the improvement of people's awareness of environmental protection, the state and local governments have promulgated more stringent environmental protection laws and policies. Industrial furnace flue gas pollutants such as soot, sulfide and nitrogen oxides are in urgent need of a high-efficiency and energy-saving technology. [0003] At present, many industries in China, such as metallurgy, power generation, ceramics, smelting and chemical industries, etc., discharge a large amount of high-temperature gas every year. The characteristics of these dusty gases are: high flue gas temperature (generally greater than 400°C), high flue gas c...

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Problems solved by technology

And at present, most of them are dedusting after denitrification, which leads to the flue gas entering the denitrification reactor containing a large amount of soot, which will affect the activity of the catalyst, thereby reducing the denitrification ef

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