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Cleaning agent for treating oily sludge by using hot washing method and preparation method of cleaning agent

A cleaning agent and sludge technology, which is applied in the field of oil production in oil fields, can solve the problems of poor oil-cement three-phase separation effect, the cleaning agent does not have both cleaning and demulsification functions, and affects the treatment effect of hot washing process. Separation effect, improving crude oil recovery rate and reducing oil content in intermediate water phase

Inactive Publication Date: 2012-12-19
PETROCHINA CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cleaning agent does not have both cleaning and demulsification functions, and the separation effect of the three phases of oil and cement is not good, which affects the treatment effect of the hot washing process

Method used

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  • Cleaning agent for treating oily sludge by using hot washing method and preparation method of cleaning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 18 g of polyoxypropylene polyoxyethylene phenolic resin ether, 22 g of sodium dodecylbenzene sulfonate, 5 g of fatty alcohol polyoxyethylene ether, 15 g of sodium hydroxide, 5 g of methanol, and 35 g of water.

[0014] One enamel reaction kettle with stirring, heating and cooling systems is used. First, add polyoxypropylene polyoxyethylene phenolic resin ether and sodium dodecylbenzenesulfonate into the enamel reaction kettle according to the predetermined ratio. Add water according to the ratio under constant stirring, and then add fatty alcohol polyoxyethylene ether sodium sulfate (AES) according to the ratio after stirring for 30 minutes, and continue stirring for 60 minutes. Finally, turn on the cooling water, continue to stir and add sodium hydroxide and methanol successively according to the proportion, and stir for 40 minutes while cooling. An oily sludge cleaning agent applied to a hot washing process is obtained.

Embodiment 2-5

[0015] Embodiment 2-5: The distribution ratio of each component of the oily sludge cleaning agent applied to the hot washing method is shown in Table 1.

[0016]

[0017] Table 1

[0018]

[0019] The preparation method of the cleaning agent applied to the treatment of oily sludge by hot washing method in Examples 2-5 is the same as that in Example 1.

[0020] The cleaning agent of the present invention was used in the first oil production plant and the oily sludge treatment station of the fifth oil production plant in Daqing Oilfield in 2011. The hot washing process parameters are: temperature 60-70°C, stirring time 0.5-2h, stirring speed 200 rpm point. The average value of oil content in the treated sludge is increased from 3.9% when the invention is not applied to 1.2%, realizing the standard treatment of the oily sludge and improving the recovery rate of resources.

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Abstract

The invention relates to a cleaning agent for treating oily sludge by using a hot washing method and a preparation method of the cleaning agent. The cleaning agent comprises the following components in percentage by weight: 10-20 percent of polypropylene oxide and polyoxyethylene phenolic resin ether, 20-30 percent of sodium dodecyl benzene sulfonate, 1-5 percent of polyoxyethylene alkyl ether sulfate (AES), 5-10 percent of sodium hydroxide, 5-10 percent of methanol and the balance of water. The preparation method of the cleaning agent comprises the following steps of: adding the polypropylene oxide and polyoxyethylene phenolic resin ether and the sodium dodecyl benzene sulfonate into an enamel reactor; adding water under continuously stirring; gradually adding the AES after 30 minutes; continuously stirring for 60 minutes and then opening cooling water; continuously stirring and sequentially adding the sodium hydroxide and the methanol; and simultaneously stirring and cooling for 40 minutes. According to the cleaning agent, the double functions of demulsifying and cleaning are achieved, the separation effect of oil, water and sludge can be improved and oil in the hot washing water and oil in the finally-treated sludge are reduced.

Description

technical field [0001] The present invention relates to a cleaning agent in the field of oil recovery, in particular to a cleaning agent used in hot washing method for treating oily sludge and a preparation method thereof. Background technique [0002] Oily sludge is one of the main pollutants produced in the process of oilfield development, storage and transportation. If the oily sludge is not treated in time, it will have varying degrees of impact on the production area and the surrounding environment. The first is that the oil and gas in the oily sludge volatilize, causing the air quality in the production area to exceed the standard concentration of total hydrocarbons; the second is that the scattered and piled oily sludge pollutes surface water and even groundwater, causing COD, BOD and petroleum in the water to seriously exceed the standard; The third is that the oily sludge contains a large amount of crude oil, causing the oil in the soil to exceed the standard, causi...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F1/40
Inventor 龙彪乔丽艳林森张韶晖贾庆薛强
Owner PETROCHINA CO LTD
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