Desulfurization and denitrification integrated purification adsorbent, adsorption equipment and adsorption method

Abstract

The invention relates to desulfurization and denitrification integrated purification adsorption equipment. The desulfurization and denitrification integrated purification adsorption equipment is characterized by comprising an adsorbent preparation box and a reaction tower, wherein the adsorbent preparation box is connected with the upper part of the reaction tower by a slurry supply pump and a pipeline for conveying adsorbent slurry, and the inlet of the adsorbent preparation box is connected with a water inlet pipe, an activated semi-coke powder bin, an iron sesquioxide powder bin and a vanadium pentoxide powder bin respectively. The desulfurization and denitrification integrated purification adsorption equipment has the beneficial effects that firstly, the desulfurization and denitrification efficiency is high, pollutants such as smoke and the like can be removed simultaneously, the flue gas treatment flow is simple, the water consumption is low, and a large drainage treatment device is not required; secondly, the adsorbent has wide source, low price and can be recycled; thirdly, the technological process is simple, the running operation is easy, and the desulfurization and denitrification integrated purification adsorption equipment has strong boiler load change adaptation ability; and fourthly, the reaction tower and a regeneration tower have small volumes, the occupied area is reduced, and the desulfurization and denitrification integrated purification adsorption equipment can be in split design, is suitable for transformed old thermal power plants and new power plants.

Description

technical field [0001] The invention relates to an adsorbent and adsorption equipment for integrated purification of desulfurization and denitrification. Background technique [0002] Industrialized SO 2 / NO x The combined removal process uses a high-performance lime / limestone flue gas desulfurization (FGD) system to remove SO 2 And use SCR technology to remove NOx. The process can remove more than 90% of SO 2 and more than 80% NO x . But the main problem of this combined process is that 0.2%~2% SO in the flue gas 2 Oxidation to SO 3 , while SO 3 React with free CaO and ammonia to form CaSO 4 And ammonium salts cause fouling on the surface of the catalyst, which reduces the SCR denitrification efficiency and increases the blockage and corrosion of the air preheater. Carbon-based materials are rarely used alone for desulfurization and denitrification, because in the process of continuous experimental exploration, it is found that the performance of desulfurization a...

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Problems solved by technology

But the main problem of this combined process is that 0.2%~2% SO in the flue gas 2 Oxidation to SO 3 , while SO 3 React with free CaO and ammonia to form CaSO 4 and ammonium salts cause fouling on the surface of the catalyst, which reduces the SCR denitrification efficiency and increases the blockage and corrosion of the air preheater

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