Deep smoke purifying material, and preparation method and use method thereof

Abstract

The invention discloses a deep smoke purifying material, and a preparation method and a use method thereof. The deep smoke purifying material comprises the following components in percentage by weight: 0-20 wt% of metal oxide, 1-40 wt% of alkaline or an alkali compound and 50-80 wt% of a carrier. The deep smoke purifying material is prepared by using a dipping method. According to the use method of the deep smoke purifying material, the deep smoke purifying material is used in a form of a stationary bed, and is suitable for being used in occasions with the smoke concentration of less than 2 percent, the pressure of 0.1-1MPa, the temperature of 0-200 DEG C, and the space velocity of 100-20000h<-1>; when an adsorbing material adsorbs smoke until saturation and the purifying efficiency is reduced, no stop is required for replacing the deep smoke purifying material, the deep smoke purifying material can be cleaned by directly using a solution of the alkaline or alkali compound, and the purifying efficiency can be recovered to reach an original level after the deep smoke purifying material is cleaned. The use method is low in operation cost, is capable of deeply purifying smoke, and is capable of meeting the emission standard of sulfur dioxide of 50mg / m<3>.

Description

Technical field [0001] The invention relates to the field of flue gas purification, in particular to a material for deep flue gas purification and a preparation method and use method thereof. Background technique [0002] SO2 is the culprit causing acid rain and one of the most harmful gases to the natural environment. If the direct discharge has a bad impact on production operations, the surrounding environment and factory workers, it is one of the environmental pollutants that must be eliminated or controlled. The emission of sulfur dioxide is one of the main causes of acid rain and smog. In the prior art, the main desulfurization processes of power plant flue gas are shown in Table 1. [0003] Table 1 Comparison of main desulfurization processes of power plant flue gas [0004] [0005] [0006] At present, domestic flue gas purification technologies include dust removal, desulfurization, and out-of-stock technologies. These technologies are already mature and widely used in in...

AI Technical Summary

Problems solved by technology

The above table is a comparison of the advantages and disadvantages of the main flue gas desulfurization processes in power plants. The most widely used desulfurization technology is the limestone-gypsum flue gas desulfurization process, and the desulfurization efficiency can be greater than 95%. The requirements are getting higher and higher, and the traditional desulfurization technology has been difficult to meet the new emission standards

The "Emission Standard of Air Pollutants for Thermal Power Plants" (GB13223-2011) began to be implemented on July 1, 2014, in which the sulfur dioxide emission standard for coal-fired boiler flue gas is 200mg / m 3 , the new project is 100mg / m 3 , 50mg / m in key areas 3 , the traditional desulfurization technology is difficult to reach 50mg / m 3 Standards, the development of deep purification technology for flue gas is imminent

Images