Oil-based drill cutting continuous microwave pyrolysis device and process

Abstract

The invention discloses an oil-based drill cutting continuous microwave pyrolysis device. The device comprises a feeding device, a microwave reaction device, an oil and gas cooling recovery device anda pyrolysis residue cooling device. The feeding device comprises a feeding bin and a belt conveyor. The microwave reaction device comprises a microwave reaction chamber, a waveguide feed port is arranged at the top end of the microwave reaction chamber, and a quartz chamber is arranged inside the microwave reaction chamber. The quartz chamber is composed of a fixed ring wall and a rotating tray,and the top end of the quartz chamber is open. A feeding buffer bin is disposed below the end of the belt conveyor and communicated with the quartz chamber through a chute. A discharging port is arranged on the fixed ring wall at the position above the corresponding discharge buffer bin. The discharging port is provided with a scraper plate, and the scraper plate is connected to the discharge buffer bin through a chute. The device can achieve continuous uniform feeding and continuous discharging without blockage in the closed environment, prevents leakage of microwaves, and prolongs service life.

Description

Technical field [0001] The invention relates to a continuous microwave pyrolysis equipment and process for oil-based drill cuttings, belonging to the field of oily solid waste treatment. Background technique [0002] As a key technology for shale gas extraction, oil-based drilling fluids will generate a large amount of hazardous solid wastes such as oil-based drilling cuttings during use. Oil-based drilling fluids have been used because they contain pollutants such as petroleum hydrocarbons, heavy metals, and organics. If it is listed as a national hazardous waste, if it is discharged directly without treatment, it will cause serious harm to the surrounding ecological environment. In this regard, the harmless treatment of oil-based solid waste such as oil-based drill cuttings is imminent. [0003] The pyrolysis technology treatment plan of oily solid waste is to heat it to a certain temperature under anaerobic conditions (usually about 450°C or even higher), so that the hydrocarbo...

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Problems solved by technology

However, there are also problems, such as the use of belt conveyor, the need to install a sludge shape controller to control the sludge shape, the microwave absorption efficiency is low, and the pyrolysis residue and its residual heat energy have not been effectively utilized, etc.

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