Oily sludge pyrolysis energy recovery system based on single-screw expander

Abstract

The invention aims to provide an oily sludge pyrolysis energy recovery system based on a single-screw expander to fully utilize a large amount of waste heat resources existing in an existing oily sludge pyrolysis system. The oily sludge pyrolysis energy recovery system comprises a pyrolysis reactor used for pyrolyzing oily sludge into pyrolysis flue gas, pyrolysis oil gas and solid residues; wherein a pyrolysis flue gas outlet of the pyrolysis reactor is connected with a first evaporator, heat exchange between pyrolysis flue gas and a first organic working medium is achieved in the first evaporator, and the first evaporator is further connected with a flue gas purification device and used for discharging the pyrolysis flue gas; the first evaporator is provided with a first organic workingmedium inlet and a first organic working medium outlet, and the first organic working medium outlet is sequentially connected with a first single-screw expander, a first condenser and a first workingmedium pump in series through a pipeline and then connected back to the first organic working medium inlet. And the first single-screw expander is connected with a first generator.

Description

technical field [0001] The invention relates to an oily sludge pyrolysis energy recovery system based on a single-screw expander, which is mainly used for recycling pyrolysis flue gas and energy in cracked oil gas produced in oily sludge, and belongs to the field of industrial waste heat utilization. Background technique [0002] At present, the world's resources are in short supply, and our country has low energy utilization rate and serious waste of resources. Moreover, my country is in the late stage of industrialization, and industrialization continues to accelerate, but the level of resource utilization cannot keep up with the process of industrialization, resulting in poor economic benefits and intensified pressure on the ecological environment. In 2016, my country officially became the world's largest energy consumer, accounting for 23% of global consumption. The energy consumption in the industrial field is as high as 70% of the total energy consumption in the countr...

AI Technical Summary

Problems solved by technology

There are a lot of waste heat resources in the sludge pyrolysis system. The temperature of the pyrolysis flue gas is too high, and the direct discharge will cause waste and environmental pollution. The cracked oil gas needs to be cooled, and a large amount of energy will be released during cooling. Therefore, the energy recovery system is designed to realize the waste. The recovery and utilization of waste heat from low-grade heat sources in the sludge pyrolysis system is very important for energy saving and consumption reduction in the actual industrial production process of sludge pyrolysis recovery

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