Comprehensive utilization system for sludge based on gasification, and treatment method thereof

Abstract

The invention discloses a comprehensive utilization system for sludge based on gasification. The system comprises a wet sludge storage bin, sludge drying equipment, a fluidized bed gasification furnace, a second gas-solid separator, auxiliary fuel, a gasified gas condenser, gasified gas purification equipment, a gas turbine, a waste heat boiler, a flue gas purifier, a chimney, a hot air chamber, a gasifying agent, a steam condenser, a first gas-solid separator, an exhaust fan, a limestone bin, a Roots blower, a first feeder, a second feeder and a jet feeder. The invention further discloses a treatment method of the system. The sludge is converted into the combustible gas through the gasification method, then electricity and heat are generated, gasification has the advantage of being lower in pollutant emission compared with a traditional incineration mode, the combustible gas does not need to be stored, the energy utilization efficiency of the combustible gas is higher than that of direct sludge incineration, the gasification efficiency is further improved through the catalytic action of limestone, and the pneumatic conveying mode is more beneficial to preventing odor and dust emission of the dried sludge, and the system is more concise, environment-friendly and efficient.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a gasification-based sludge comprehensive utilization system and treatment method. Background technique [0002] With the increase of sewage discharge and the improvement of sewage treatment rate, the output of solid product - sludge - after sewage treatment is also increasing year by year. The problem of sludge treatment and disposal has become an important issue of social concern. We are actively researching and developing sludge treatment processes that can achieve volume reduction, harmlessness and resource utilization. The sludge treatment technologies currently in use mainly include land use, sanitary landfill and incineration, etc. In addition, some emerging treatment technologies are constantly developing, such as sludge pyrolysis to oil technology, sludge to activated carbon technology, and sludge to brick making technology, sludge ceramic te...

AI Technical Summary

Problems solved by technology

If it is necessary to send the dried sludge to the incineration plant for further treatment, it is generally necessary to mix the dried sludge with fuel, and set up mechanical conveying equipment such as belts to send it to the incinerator. These equipment are generally open-air, and Airtightness is poor

The dried sludge is easy to generate dust and odor during the transportation process, resulting in environmental pollution

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