Continuous reaction device and method for microwave biomass pyrolysis

Abstract

The invention relates to a continuous reaction device and a method for microwave biomass pyrolysis. The continuous reaction device for the microwave biomass pyrolysis mainly comprises a microwave generator, a reactor and a resultant separating device. The continuous reaction device is a continuous operating system and can process 10-50kg of the biomass every hour. According to the continuous reaction device for the microwave biomass pyrolysis, characteristics of microwave volume heating, transient heating and selective heating are fully utilized, undried biomass is directly pyrolyzed so as toobtain three products of liquid bio-oil, bio-gas and solid coke, the pylolysis efficiency of the biomass is greatly improved, the yield and the quality of the liquid bio-oil are improved, the structure is simple, the design is reasonable, and the achievement of industrial application of the microwave biomass pyrolysis is facilitated.

Description

technical field [0001] The invention relates to a biomass pyrolysis device and method, and belongs to the technical fields of microwave heating application technology and regeneration and utilization of biomass waste resources. Background technique [0002] With the rapid reduction of fossil fuels such as petroleum, biomass energy has risen rapidly and has been favored by researchers. Bio-oil, a liquid product of biomass pyrolysis, has attracted widespread attention as a liquid energy source that is very likely to replace fossil fuels. It is of great significance to the protection of the ecological environment, and its economic benefits will become more and more significant with the rise of the fuel market price. my country's biomass pyrolysis technology to produce bio-oil started relatively late, and microwave pyrolysis biomass technology is particularly immature. According to the principle of microwave heating, microwave pyrolysis of biomass has the advantages of fast spe...

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Problems solved by technology

However, under continuous operation conditions, various abnormal conditions may occur in the reactor, such as the reactor is blocked by the feed, and external force is required to dredge the material, which is easy to cause the reactor to break during the actual operation.

In the reports of continuous microwave reactors, there are tube or conveyor belt heating methods, but the heating tube materials used are either polytetrafluoroethylene and other materials that cannot withstand high temperatures, or although the reactor can withstand high temperatures, the reaction is Open system, cannot be used in closed biomass pyrolysis

The utility model patent CN201252654Y adopts a spiral conveying and stirring microwave heating device, but because the microwave enters through the window, once the system is blocked, the system pressure will rise rapidly. If the window is broken, the material will enter the waveguide, which will affect the microwave magnetism Control is destructive and security cannot be guaranteed

CN2015207545U discloses a continuous microwave low-temperature dry distillation device, mainly for dry distillation of pulverized coal at low temperature, but the device has a long heating time, takes 15-30 minutes from room temperature to 750°C, and has a small processing capacity. up to 5 kg

Therefore, there is still no continuous reaction device that can realize microwave biomass pyrolysis

Moreover, the operating conditions of continuous reaction and batch reaction are also very different. At present, there is still no reasonable reaction operation method to achieve continuous reaction.

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