Down-drain sludge microwave pyrolysis system and method for product collection

Abstract

The invention relates to a down-drain sludge microwave pyrolysis system and method for product collection. The system comprises a microwave oven, a conical flask, a flask, a scrubbing gas flask, a quartz beaker and a thermocouple arranged in the quartz beaker; wherein the quartz beaker is correspondingly arranged inside the microwave oven cavity; a quartz tube is fixedly inserted into the quartz tube passage, a purge gas inlet pipe is connected to the quartz tube, and a quartz cap is arranged on the quartz tube, a lower end of the quartz tube, the conical flask, a condenser, the flask, a resintube and the scrubbing gas bottle are connected in series. The method comprises the following steps: preparing samples by mixing; vertically arranging the quartz beaker containing the sample in the quartz tube; supplying nitrogen with a flow rate of 3L / min and purging for 10 minutes; then supplying nitrogen gas with a flow rate of 0.2 L / min to ensure the inert atmosphere during the pyrolysis process; carrying out the pyrolysis of the sample and obtaining the temperature data in real time, taking out the solid in the quartz beaker at that end of the pyrolysis. The system and the method can ensure the accurate and effective collection of solid, liquid and gas products, and can reduce the interference of the thermocouple in the microwave pyrolysis process.

Description

technical field [0001] The invention belongs to the technical field of analysis and testing devices, in particular to a bottom-out sludge microwave pyrolysis system and method for product collection, and belongs to the technical field of sludge treatment. Background technique [0002] Sludge is an auxiliary product of water treatment, and the treatment and disposal methods mainly include landfill, agricultural use, composting, incineration and pyrolysis. Among them, the pyrolysis treatment method can achieve the harmlessness and volume reduction of the sludge, and obtain beneficial by-products. The product gas and oil can be further processed as fuel, and the product residue can be improved and utilized as activated carbon. Microwave pyrolysis sludge technology is a sludge treatment technology that has developed rapidly in recent years. Compared with conventional electric heating, it has the characteristics of rapid heating, uniform heating, and good product quality, and ha...

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Problems solved by technology

[0003] However, there are two significant problems to be overcome in the collection of microwave pyrolysis sludge products: one is that microwaves are volumetric heating, and the temperature of the outer wall of the reactor is often low, causing the pyrolyzed volatiles to condense on the outer wall of the reactor and flow back to the reactor , mixed with solid products, affecting the separation and collection of solid products and liquid products; second, the thermocouple used to measure the temperature of the sample in the microwave pyrolysis process may interfere with the microwave pyrolysis process, affecting the accurate measurement of the reaction temperature, rather than Contact temperature measurement often cannot represent the real reaction temperature of sludge pyrolysis

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