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Integrated biogas cleaning system to remove water, siloxanes, sulfur, oxygen, chlorides and volatile organic compounds

An organic compound and cleaning system technology, applied in the field of waste biogas cleaning, can solve the problem of not containing

Active Publication Date: 2013-05-01
QUADROGEN POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The big hurdle, however, is that most biogas does not contain the hydrogen needed for the hydrodesulfurization reaction to occur properly

Method used

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  • Integrated biogas cleaning system to remove water, siloxanes, sulfur, oxygen, chlorides and volatile organic compounds
  • Integrated biogas cleaning system to remove water, siloxanes, sulfur, oxygen, chlorides and volatile organic compounds
  • Integrated biogas cleaning system to remove water, siloxanes, sulfur, oxygen, chlorides and volatile organic compounds

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Embodiment Construction

[0057] Biogas cleaning systems and methods satisfying the needs described in the background are provided. There are technical challenges and obstacles in designing and integrating the various conflicting stages of pollutant removal to achieve extremely low concentrations of pollutants. Providing an efficient and improved integrated biogas cleaning system optimized to remove various biogas pollutants in novel technological sequences and combinations requires novel and new designs to integrate processing conditions, material requirements and efficient input temperatures for each stage and the degree of residual pollutant concentration, and compensate for each exposure treatment condition, material requirement and effective input segment and degree of residual pollutant concentration. The embodiments described here have addressed a variety of these unresolved needs in an efficient, efficient and integrated manner, and the most relevant of which are specific solutions for each nee...

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Abstract

An integrated biogas cleaning system is provided to clean biogas from sources such as landfills and digesters for heat and power generation systems such as boilers, engines, turbines, or fuel cells. Siloxanes, chlorine, oxygen and sulfur are removed to parts per billion levels as well as removing the majority of water and some volatile organic compounds. The biogas system cools a biogas stream to partially remove contaminants, blends in a small concentration of hydrogen gas and then combusts the remaining oxygen to heat the biogas and leave sufficient hydrogen suitable for a downstream sequence of further contaminant conversion and removal in stages using a hydrodesulfurization bed and adsorbent media beds. Heat exchange arrangements provide efficient recycling of waste heat and compensation for varying levels of oxygen in the incoming biogas waste stream, suitable for use in a wide range of biogas generating sources. The resulting biogas fuel product is suitable for use in combustion generators, fuel cell systems, greenhouse boilers, or as feedstock for further upgrading to renewable natural gas.

Description

technical field [0001] The present invention relates to the cleaning of waste gas, including landfill gas. More specifically, the present invention relates to a method for removing pollutants unsuitable for use as fuel, including water, volatile organic compounds, siloxanes, oxygen, chlorine and sulfur, to less than 50ppb (parts per billion) biogas cleaning system. Background technique [0002] Biogas is generally a waste product from sources including anaerobic digesters, municipal waste treatment plants, and landfills, or any source where organic waste is capable of decomposing in a largely oxygen-free environment. Biogas generally contains about 50% to 75% methane, 25% to 50% carbon dioxide, 0% to 10% nitrogen, 0% to 1% hydrogen, 0% to 3% sulfur and 0% to 2% Oxygen (all by volume) and various trace impurities that may include siloxanes, chlorine, volatile organic compounds, and ammonia. At temperatures slightly above the surrounding environment, for example up to about...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/46C01B17/16C01B7/01
CPCB01D53/864Y02C20/20B01D2253/102B01D2253/1124C01B17/16C01B7/07B01D2251/304B01D2257/80B01D53/685B01D2255/1025B01D2257/55B01D2255/20746B01D2255/20753B01D2255/1023B01D2253/108B01D2253/116B01D2257/708B01D53/75B01D53/48B01D2257/20B01D2255/1021B01D2251/202B01D2257/104C01B17/164B01D53/72B01D2257/30B01D2255/20769B01D2258/05B01D53/265C12M47/18Y02P20/129Y02P20/59B01D53/02B01D53/46B01D53/86
Inventor 阿拉赫·普拉萨德凯文·马钱德
Owner QUADROGEN POWER SYST
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