Device and method for preparing high-quality pyrolysis gas and activated carbon by self-cleaning gasifying-pyrolyzing coupling and activating through organic matters

Abstract

The invention provides a device and a method for preparing high-quality pyrolysis gas and activated carbon by self-cleaning gasifying-pyrolyzing coupling and activating through organic matters. The device and the method are characterized in that the organic matters in a self-cleaning gasifying-pyrolyzing coupling and activating device sequentially pass through a pyrolyzing drying area, a gasifyingactivating area and a solid product discharging area; the organic matters are dried and pyrolyzed to produce pyrolysis gas, coke and semicoke while falling off; the coke in the device is condensed and absorbed to the surfaces of the organic matters and is completely cracked into small micromolecular pyrolysis gas after being reorganized at a plurality of times; the semicoke is fed into the gasifying activating area; the gas produced by gasifying part of semicoke is pressurized through a high-temperature pressurizing device and then is conveyed into a heat storing type heating device; the heated gasified gas is returned to the gasifying activating area and is used as an activating agent for activating the semicoke, thus the semicoke micropore and mesopore structure is continuously enriched, and as a result, the activated carbon with large specific surface area can be prepared and is discharged from the solid product discharging area in order to be collected; the calorific value of thepyrolysis gas in the processes of reorganizing of the coke and the activating of the semicoke continuously increases, and the high-quality pyrolysis gas is subjected to heat exchange and then is collected through a gasometer.

Description

technical field [0001] The invention belongs to the technical field of energy utilization and environmental protection material manufacturing, and specifically relates to a device and method for preparing high-quality pyrolysis gas and activated carbon through self-cleaning gasification-pyrolysis coupled activation of organic matter. Background technique [0002] There are many types of organic matter and the yield is huge. Gasification pyrolysis is considered to be an effective method for the resource recovery of organic matter. Combustible gas, tar, semi-coke and other products can be obtained through gasification and pyrolysis of organic matter. Combustible gas and tar contain high calorific value, and coke can be activated to form activated carbon. Activated carbon is a carbonaceous material with a large specific surface area and well-developed pores, and has excellent adsorption capacity. Adsorption, separation, purification and energy storage of phase and gas phase ...

AI Technical Summary

Problems solved by technology

The advantage of the physical activation method is that the process is simple, the preparation cost is low, the pollution to the environment is small, and no washing is required in the later stage. The disadvantage is that the activation temperature is high, the quality of the activated carbon is relatively low, and the economic added value is low. The more commonly used physical activation reagents include water vapor and carbon dioxide. etc. When these reagents are used for activation, additional energy is consumed to provide heat for the activation process; the advantage of chemical activation is that the preparation temperature is lower than that of physical activation, the energy demand is relatively small, and the quality of activated carbon is higher. The disadvantage is that the cost High, the pollution to the environment is relatively serious

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