Chemisorption, catalytic systems for biogas purification

摘要

The invention relates to the field of purifying biogas formed during the anaerobic fermentation of various agricultural, food, household and other organic wastes. Before author task was to develop a system of biogas cleaning, which differs considerably reduced consumption chemisorbent and volume of secondary waste coupled with technological simplicity, low power consumption and high cleaning efficiency. The problem is solved in that the chemisorption-catalyst system for cleaning biogas, comprising at least two parallel hemosorbera with fixed beds of solid granular chemisorbent capable chemisorb hydrogen sulfide, further includes a preliminary desulfurization biogas unit consisting of starting biogas mixing device with air and partly purified sulfur biogas heater resulting gas mixture of hydrogen sulfide oxidation reactor containing a fixed bed of solid edges an isolated catalyst capable of oxidizing hydrogen sulfide with oxygen to elemental sulfur, a heat exchanger for cooling the gaseous mixture and condensing the vapors formed elemental sulfur as well as a conduit for recirculating a portion of purified from biogas sulfur, the starting biogas mixing unit with air and a part of purified sulfur biogas comprises a control system air flow rate and a portion of the purified biogas sulfur configured to maintain the concentration of hydrogen sulphide in the produced gas mixture is not more than 1.2% about. and the oxygen concentration in the range of 60-100% of said hydrogen sulfide concentration. A technical effect of the claimed utility model is a significant decrease in flow chemisorbent and volume of secondary waste, landfill gas to produce energy and commodity products - elemental sulfur, high carbon dioxide, as well as high efficiency purification of biogas in combination with minimal capital and operating costs. The formula of the utility model provides one independent and four dependent claims.