A process for the co-production of activated carbon and heat by downdraft fixed-bed gasification of fruit shells for power generation

Abstract

The invention relates to a technology for shells downdraft fixed bed gasification power generation and co-production of active carbon and heat. The technology is characterized in that a large-scale gas-carbon co-production downdraft fixed bed gasifier is utilized to gasify shells biomass to prepare fuel gas which is used as fuel of a gas-fired boiler; steam generated by the gas-fired boiler drives a steam turbine to generate power; and active carbon and heat are obtained simultaneously. The invention has the following advantage: by using shells biomass as the raw material, a series of problems such as large environmental pollution, high energy consumption, poor product uniformity, low degree of automation, single product and the like existing in a traditional active carbon production device are solved. Shells resources are highly efficiently utilized, economic benefit is raised, and the environment is protected. The technology for shells downdraft fixed bed gasification power generation and co-production of active carbon and heat and complete equipment have advantages of stable operation, high thermal efficiency of hot gas combustion, various products, good economic benefit and environmental effect and large-scale application. Previous shells downdraft fixed bed gasification power generation process equipment has no shell charcoal or active carbon products.

Description

technical field [0001] The invention relates to a process for the co-production of activated carbon and heat by downdraft fixed-bed gasification of fruit shells, belonging to the field of biomass energy and activated carbon. Background technique [0002] Due to its own characteristics, fruit shell biomass is a high-quality raw material for the production of activated carbon. Due to the limitations of the equipment in the current production of fruit shell activated carbon, no matter the one-step method or the two-step method, only one product activated carbon can be obtained, and the heat is not fully utilized, resulting in Serious waste of resources and certain environmental pollution. [0003] In the past, the downdraft fixed-bed gasification power generation process equipment of fruit shells did not have shell carbon or activated carbon products. [0004] Biomass gasification, as a thermochemical conversion method in the utilization of biomass resources, has been deeply s...

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Problems solved by technology

In addition, in the actual operation of traditional biomass (including fruit shells) gasification power generation, there are many problems in the gas-fired power generation system (①mainly including the small scale of a single unit, currently only 500KW biomass gas-fired power generation units are available ; ②Gas generators are noisy and vibrate; ③Maintenance and maintenance are frequent, costly, and running time is short; ④Gas generators have high requirements on gas quality and require high automation control level and gas turbine manufacturing technology; ⑤ There are still some problems in the collection and utilization of the liquid after the purification of combustible gas, including tar; ⑥The scale of gas generators is small and the number of generators is large. Purifying combustible gas requires a large amount of circulating water and occupies a large area; The process of gas will also produce certain tar smell and environmental pollution problems; ⑧ Insufficient standardization of gas purification system, biomass gas generator, etc.)

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