Resourceful disposal system and method for oil-bearing solid waste microwave heat desorption

Abstract

The invention discloses a resourceful disposal system and method for oil-bearing solid waste microwave heat desorption. The disposal system comprises a feed unit, an indirect-heating low-temperature heat desorption unit, a microwave high-temperature heat desorption unit, a nitrogen generation and oxygen content detection unit and an oil and gas condensing and exhaust treatment unit; oil-bearing solid waste is subjected to oil recovery and bit cuttings recovery through the above units. By the arrangement of the disposal system and method, efficient heat desorption is achieved, the oil-bearing solid waste can be separated without causing secondary pollution, oil yield is high, and recovered oil is clear and transparent in color.

Description

technical field [0001] The invention relates to the field of oily solid waste treatment, in particular to a microwave thermal desorption resource recovery treatment system and treatment method for oily solid waste. Background technique [0002] With the continuous development of domestic oil fields, the amount of sewage produced has increased sharply, and the amount of sludge produced has also increased sharply. These sludges not only contain oil, but also contain various auxiliary components. It takes hundreds of years for these components to completely decompose under natural conditions. Time, not only directly occupy the land and space, but also seriously pollute the air, soil and groundwater, restricting the development of domestic oil field production to a certain extent. [0003] At the same time, during the use of oil-based drilling fluid, a large amount of oily cuttings will be produced. These cuttings contain a large amount of mineral oil, phenolic compounds, heavy ...

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Problems solved by technology

[0005] At present, the commonly used oily drilling cuttings treatment technologies generally have the following problems: high processing costs, such as high cost of high-efficiency curing agents for drilling cuttings reinjection and curing methods; other pollution or potential threats, such as incineration methods that require incineration equipment, incineration Toxic and harmful substances will be released from time to time, resulting in secondary pollution; the oil yield is low, which is far from the "zero discharge standard"

Solidification / stabilization dumps are too large and contaminants may re-contaminate the environment over time

The existing indirect heating desorption technology requires a temperature gradient for heat conduction, which makes the temperature distribution uneven, causes local coking and carbonization, and greatly affects the stability of equipment maintenance and operation.

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