Room temperature marsh gas desulfurizer and preparation method thereof

Abstract

The invention relates to a room temperature marsh gas desulfurizer and a preparation method thereof. The marsh gas desulfurizer comprises a carrier, ferric oxide monohydrate, mineral powder and hydrated lime. The preparation method comprises the following steps: grinding the mineral powder, mixing the grinded mineral powder with ferric oxide and hydrated lime evenly, adding water and kneading, extruding, moulding and drying the mixture to obtain the room temperature marsh gas desulfurizer of the invention. The room temperature marsh gas desulfurizer of the invention overcomes the disadvantages of existing marsh gas desulfurizer such as low sulfur capacity, high abrasion, easy agglomeration and short service life and has the advantages of high sulfur capacity, good activity, no agglomeration, easy preparation and regeneration and the like.

Description

technical field [0001] The invention relates to a normal-temperature biogas desulfurizer and a preparation method thereof, belonging to the field of gas purification and desulfurizer preparation. Background technique [0002] Biogas is a flammable gas produced by anaerobic fermentation using various livestock manure and chemical waste as raw materials. Biogas generally contains methane (CH 4 )60%-70%, carbon dioxide (CO 2 )25%-40% and a small amount of ammonia (NH 3 ), hydrogen (H 2 ) and carbon monoxide (CO), as well as a large amount of hydrogen sulfide (H 2 S). Biogas produced from different raw materials has different hydrogen sulfide content, and the general hydrogen sulfide content is 1.5-3.5g / m 3 . [0003] Hydrogen sulfide is a highly toxic and harmful gas. Hydrogen sulfide has a strong corrosive effect on pipelines, burners and other combustion equipment, metering instruments, etc. in the air and under humid environmental conditions; sulfur dioxide (SO 2 ) ...

AI Technical Summary

Problems solved by technology

[0004] For this reason, people have developed many biogas desulfurization technologies and biogas desulfurizers. Common biogas desulfurizers include activated carbon, zinc oxide, manganese oxide, molecular sieve, or iron oxide. At present, the most used biogas desulfurizer is iron oxide desulfurizer, but iron oxide desulfurizer has the defects of easy hardening, low cumulative sulfur capacity and short service life

[0005] A kind of amorphous desulfurization agent is disclosed in the Chinese patent document whose publication number is CN1616139A. Manganese ore powder symbiotic with various metals such as manganese, copper, zinc, etc. is the main component, and also includes lignin, desulfurization additives and water. The initial sulfur capacity of the desulfurizer is greater than 7%, and the cumulative sulfur capacity for three times is greater than 23%, which improves the current normal temperature. Amorphous desulfurizers have the defects of low initial sulfur capacity and easy compaction, but they still have shortcomings such as short service life, insufficient initial sulfur capacity and cumulative sulfur capacity

[0006] In the Chinese patent literature with the notification number CN1075832C, a solid regenerative gas desulfurizer and its regeneration process are disclosed. The gas desulfurizer is composed of 40-50% ferrous sulfate, 40-50% calcium hydroxide, 0.4 -0.8% copper sulfate and 5-10% plaster of paris, which has the advantages of good desulfurization effect, long service life, no spontaneous combustion, and non-toxicity, but it has the disadvantages of low initial sulfur capacity and cumulative sulfur capacity