Method using hydrogen donor for thermal conversion processing of greasy filth

A technology of thermal conversion and hydrogen supply agent, which is applied in the direction of pyrolysis treatment of sludge, etc., can solve the problems of waste of petroleum resources, pollution of water bodies and vegetation, acidification or alkalization, etc., achieve good flexibility, reduce coke production, and easy operation Effect

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

These oil sludges generally contain benzene series, phenols, citrons and other substances, and are accompanied by stench and toxicity. If they are directly in contact with the natural environment, they will poison, acidify or alkalinize the land, resulting in changes in soil and soil structure, hindering the growth of plants. The root system grows and will cause great pollution to water bodies and vegetation, and it also means a waste of oil resources

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  • Method using hydrogen donor for thermal conversion processing of greasy filth

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Embodiment 1

[0025] Take the sludge at the bottom of a refinery oil tank as an example to illustrate this embodiment, the process flow is as follows figure 1 shown. Oil sludge contains 75% oil, 14% water, and the rest is solid matter.

[0026] After the oil sludge is dehydrated by mechanical stirring, it is heated to 250°C under anaerobic conditions and sent to the flash tower for flash evaporation. Water vapor and light hydrocarbon vapor are obtained at the top of the tower, which are condensed and separated by an oil-water separator to obtain light oil, and the sewage enters the sewage treatment system. The bottom of the flash tower is mud mixed with heavy oil and solids. Filter the mud to obtain heavy oil and solid matter; at 400°C, use N 2 Sweep solids to carry oil and gas out of them. The pressure of purging is controlled at 0.2MPa.

[0027] Heavy oil is recovered, and tetralin is added for mixing, and the blending ratio of tetralin is 5%. The heavy oil mixed with tetralin is he...

Embodiment 2

[0030] Take the sludge at the bottom of a refinery oil tank as an example to illustrate this embodiment, the main process flow is as follows figure 1 shown. Oil sludge contains 67% oil, 23% water, and the rest is solid matter.

[0031] In this example, catalytic cracking oil slurry is used as the hydrogen donor, and the ratio of the hydrogen donor is 10%. The reaction temperature of the thermal conversion reactor is 450° C., and the reaction time is 120 minutes.

[0032] After the oil sludge undergoes thermal conversion reaction, the gas yield is 12%, the fraction yield at 350°C is 42%, and the coke yield is 4%. . (The yield of each component is based on the oil content in the sludge).

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Abstract

The invention discloses a method using a hydrogen donor for thermal conversion processing of greasy filth. The method is as follows: after mechanical dehydration of the greasy filth, under anoxic conditions, heating the greasy filth to 100-300 DEG C, entering into a flash tower for hot flash, recovering light oil components and mud; performing solid-liquid separation on the mud to obtain heavy oil components and solid matters, blowing the solid matters with nitrogen gas or water vapor, recovering the heavy oil components; mixing the heavy oil components with the hydrogen donor for a heat transfer reaction, obtaining various products by reaction oil and gas fractionation. The method, when used in processing of the greasy filth, has the advantages of good flexibility, reduction of coke yield, improvement of heat transfer depth and the like.

Description

technical field [0001] The invention relates to a treatment method for oily sludge, in particular to a method for treating oily sludge by thermal conversion of a hydrogen-donating agent. Background technique [0002] Oily sludge mainly refers to the oily sludge formed by crude oil and soil due to various reasons, and the oily sediment brought out by the system in the normal production of oilfields. It is a solid waste rich in mineral oil. The main components are crude oil, mud and water. The size of solid particles can range from less than microns to several inches, most of which are between 1 and 100 microns. The composition of oil depends on the type of crude oil, refinery structure and operating conditions. The composition of sludge may change over time. Usually sludge contains a certain concentration of crude oil (5% to 80%), heavy metal ions (such as iron, copper, nickel, etc.) and inorganic salts (5% to 20%) compounds. These oil sludges generally contain benzene seri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/10
Inventor 回军赵昕
Owner CHINA PETROLEUM & CHEM CORP
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