Biogas purification treatment system and process suitable for small and medium-sized biogas generator sets

Abstract

The invention relates to a biogas purification treatment system and process suitable for medium-and-small sized biogas generating sets. The system comprises a biogas treatment component, which comprises a wire gauze filtration device, an aspirator pump, a first-stage drying device, an alkaline cleaning device, a second-stage drying device, an active carbon tank, a molecular sieve, a buffer tank, a compression pump, a stabilized pressure gas storage tank and a fire barrier device which are sequentially connected in series by virtue of pipelines, and a concentration and pressure detection control device which consists of an electronic control unit, a CH4 concentration sensor, a CO2 concentration sensor and a pressure sensor. The system provided by the invention can effectively remove water and impurities including particulate matters and the like in the biogas, the removal rate of CO2, H2S and SO2 is extremely high, the CH4 concentration after purification can be stabilized to be more than 98%, and an alkali liquor regeneration device can regenerate alkali liquor. A gas entering the biogas generating sets is sable in component and pressure, and the whole set of the purification device can be used for a long time, is very small in gas flow resistance and low in maintenance cost, and is particularly suitable for the medium-and-small sized biogas generating sets of medium-and-small sized biogas projects distributed in vast rural and town areas.

Description

technical field [0001] The invention belongs to the fields of environmental protection and renewable energy utilization, and in particular relates to a biogas purification treatment system and process suitable for small and medium-sized biogas generator sets. Background technique [0002] As a renewable clean energy with high calorific value, biogas has attracted great attention. my country has abundant reserves of biogas resources and a huge market demand. Domestic biogas is currently mainly used as fuel for rural stoves, and its use value is low. The development of biogas at home and abroad shows that biogas power generation is an important means of efficient utilization of biogas. [0003] There are several problems in the application process of biogas power generation, which make the promotion and development of biogas power generation obstacles. First, compared with other gases, the composition of biogas is complex, and its main component is methane CH 4 (50-70%) and...

AI Technical Summary

Problems solved by technology

However, it is not suitable for the biogas power generation devices of small and medium-sized biogas projects distributed in vast rural areas and towns, because after a certain period of use, the membrane separator will be blocked, reducing the purification effect and increasing the gas flow resistance. Even if there is no gas flow, if it is used as a fuel for a biogas generator set, the generator set will not be able to work normally in a short period of time; and the core devices such as membrane separators are replaced by scattered users, in addition to the high cost, it is technically feasible. The operability is very low; in addition, the collection of carbon dioxide has no practical significance

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