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High-concentration petroleum sludge green cleaning-thermal desorption integrated technology treatment method and treatment system

A technology for the treatment of petroleum sludge, which is applied in dehydration/drying/concentrated sludge treatment, sludge treatment, water/sludge/sewage treatment, etc., and can solve the problems of inability to achieve direct discharge or utilization, high oil content in sludge, Waste of oil resources and other issues, to achieve the effect of operating temperature and residence time, high oil recovery rate, high desorption efficiency

Active Publication Date: 2020-12-11
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oil sludge with an oil content greater than 15% is usually referred to as high-concentration petroleum sludge. At present, thermochemical cleaning is used to recover crude oil from high-concentration petroleum sludge, but only by thermochemical cleaning, the sludge after cleaning is still High residual oil content, unable to meet the standard of direct discharge or utilization
If direct thermal desorption is used to directly treat high-concentration petroleum sludge in a harmless manner, there will be great safety hazards, and there will be disadvantages such as high energy consumption and waste of petroleum resources.

Method used

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  • High-concentration petroleum sludge green cleaning-thermal desorption integrated technology treatment method and treatment system

Examples

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Effect test

example 1

[0058] Taking the oil sludge at the bottom of an oilfield as the processing object, its moisture content is 50%, oil content is 18%, and the average particle size is less than 5mm. After being treated by the high-efficiency solid-liquid separator, the moisture content of the sludge is 65%, and the oil content of the sludge is reduced to 6%; after being dried, the moisture content of the sludge is reduced to 20%, and the dried sludge is sent by the feeding system to the metering hopper and fall onto the stainless steel track in the thermal desorption system. The temperature range of the oil sludge in the thermal desorption chamber is controlled to be 500-700°C, and the residence time is 20 minutes. The temperature of the high-temperature combustion chamber is controlled at 1100°C. 2s. The oil content of the slag after thermal desorption is 220mg / kg, and the removal rate reaches 99.69%. The dioxin content in the flue gas purified by thermal desorption tail gas is less than 0.1TE...

example 2

[0060] Taking the ground oil sludge from an oilfield as the processing object, its water content is 40%, oil content is 15%, and the average particle size is less than 10mm. After being treated by a high-efficiency solid-liquid separator, the moisture content of the sludge is 60% to 65%, and the oil content of the sludge is reduced to 3%; after drying, the moisture content of the sludge is reduced to 19%, and the dried sludge is sent to the Send it to the metering hopper and fall on the stainless steel track in the thermal desorption system. The temperature range of the oil sludge in the thermal desorption chamber is controlled at 300-500 °C, and the residence time is 18 minutes. The temperature of the high-temperature combustion chamber is controlled at 850 °C. Stay for 1.5s. The oil content of the slag after thermal desorption is 200mg / kg, and the removal rate reaches 99.62%. The dioxin content in the flue gas purified by thermal desorption tail gas is less than 0.1TEQng / Nm ...

example 3

[0062] Taking the oil mud sand in an oilfield as the processing object, its water content is 55%, oil content is 25%, and the average particle size is less than 10mm. After being treated by a high-efficiency solid-liquid separator, the moisture content of the sludge is 60% to 65%, and the oil content of the sludge is reduced to 5%; after drying, the moisture content of the sludge is reduced to 18%, and the dried sludge is sent to the Send it to the metering hopper and fall on the stainless steel track in the thermal desorption system. The temperature range of the oil sludge in the thermal desorption chamber is controlled at 400-550°C, and the residence time is 20min. The temperature of the high-temperature combustion chamber is controlled at 950°C. Stay for 1.8s. The oil content of the slag after thermal desorption is 180mg / kg, and the removal rate reaches 99.71%. The dioxin content in the flue gas purified by thermal desorption tail gas is less than 0.1TEQng / Nm after high-tem...

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Abstract

Disclosed are a green cleaning-thermal desorption integrated technology treatment method and system for high-concentration petroleum sludge. The method comprises the treatment steps of homogeneous impurity removal pretreatment, chemical thermal washing treatment, solid-liquid separation and petroleum-water separation, petroleum sludge thermal desorption and high-temperature combustion and oxidation, heat exchange and tail gas cooling and dust removal. The system comprises a petroleum sludge chemical thermal washing system and a petroleum sludge decontamination thermal desorption system. The petroleum sludge chemical thermal washing system is formed by connecting a petroleum sludge homogenization tank (1), a petroleum sludge chemical thermal washing tank (2), a high-efficiency solid-liquid separator (3), an petroleum-water separator (4), a sewage integrated treatment system (6) and a water storage tank (23) successively. The petroleum sludge decontamination thermal desorption system mainly consists of a sludge dryer (10), a condensation recovery system (11), a thermal desorption feeding system (7), a thermal desorption system (8), a high-temperature combustion and oxidation system (9), a waste heat boiler (13) and a discharging system. Due to the combined application of the chemical thermal washing technology and the thermal desorption technology, multiple functions, such as resource recovery and utilization of petroleum materials and heat, reduction and decontamination treatment of petroleum sludge, can be simultaneously realized.

Description

technical field [0001] The invention relates to the technical field of oil sludge treatment, in particular to a high-concentration oil sludge green cleaning-thermal desorption integrated technology treatment method and treatment system. Background technique [0002] As a kind of chemical energy, petroleum will inevitably produce a large amount of waste residue, waste water and waste gas in the process of exploitation, transportation, storage and processing, which poses a huge potential threat to the social environment and human safety. In particular, high-concentration oily sludge contains a large amount of benzene series, anthracene, phenols, pyrene and other odorous and toxic substances. If the oily sludge is not treated in time, it will cause varying degrees of damage to the production area and the surrounding environment. Impact: The volatilization of oil and gas in oily sludge will cause the concentration of total hydrocarbons in the air quality to exceed the standard i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/13C02F11/10C02F1/40F23G7/06B01D47/06B01D53/79B01D53/40C02F101/30
CPCB01D47/06B01D53/40B01D53/79C02F1/40C02F11/00C02F11/10C02F11/12C02F2101/30C02F2303/06C02F2303/10F23G7/06Y02P70/10
Inventor 杨崎峰宋海农周永信林宏飞黎秋君廖长君黄祖浩王爱李智华赵志勇曹斐姝黄锦孙谢湉
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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