Normal-temperature iron oxide desulfurizer and preparation method thereof

Abstract

The invention discloses a normal-temperature iron oxide desulfurizer and a preparation method thereof. The desulfurizer is prepared from the following raw materials in parts by weight: 25-28 parts of lime, 40-50 parts of H2O, 27-33 parts of ferrous sulfate, 0.07-0.1 part of copper sulfate, 0.1-0.2 part of sodium carbonate and 6.0-6.5 parts of water. The preparation method comprises the following steps: mixing the lime, Fe2O3.H2O and ferrous sulfate; adding the mixture into a grinding roller, sufficiently rolling for 0.4-0.5 hour, and adding a proper amount of water in real time according to the conditions; adding the copper sulfate and sodium carbonate into the grinding roller, and uniformly mixing; and sending the rolled and mixed raw materials into a strip extruder, carrying out pressure forming, and baking or drying to obtain the strip-shaped product iron oxide desulfurizer. When being used for biogas desulfurization, the desulfurizer has the advantages of high desulfurization precision, high reaction speed, high breakthrough sulfur capacity, high strength and long service life.

Description

technical field [0001] The invention relates to the technical field of desulfurizers, in particular to a biogas iron oxide desulfurizer. Background technique [0002] Biogas is an important biomass energy. It is a combustible gas produced by microbial fermentation of biomass under anaerobic conditions. Its main components are methane and carbon dioxide, and it also contains a small amount of hydrogen sulfide. The concentration of hydrogen sulfide in biogas depends on the type of fermentation raw materials. The concentration of hydrogen sulfide in biogas produced is different for different raw materials. For example, landfill biogas generally has a low concentration of hydrogen sulfide, while livestock and poultry manure biogas has a high concentration of hydrogen sulfide. Since hydrogen sulfide will corrode compressors, gas storage tanks, engines and other equipment, it will also cause great harm to the subsequent processing process, and hydrogen sulfide combustion will gene...

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Problems solved by technology

[0003] Because there are many types of biogas, the amount of hydrogen sulfide contained in biogas produced by different raw materials is quite different, and some even have a hydrogen sulfide content of more than 70 grams per cubic gas. The existing common iron oxide desulfurizer has simple components , its components are generally composed of lime, ferrous sulfate and water according to a certain ratio. The working sulfur capacity of this desulfurizer is 11-13%, and the space velocity is relatively low, about 500-1000h -1 , when the airspeed exceeds 1000h -1 , the degree of purification is significantly reduced, and it is very difficult to remove hydrogen sulfide

Moreover, the existing desulfurizers have low strength and short service life, resulting in high operating costs

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