Oil sludge cleaning agent and method for treating oil sludge by using oil sludge cleaning agent

Abstract

The invention discloses an oil sludge cleaning agent which is prepared from a soil detergent and an emulsifier. The soil detergent is prepared from the following raw material components: sodium sulfate, limonene, organic acid, trimethylene-based di(octadecyl dimethyl ammonium chloride) and water; the emulsifier is prepared from raw material components of fatty alcohol-polyoxyethylene ether, hydroxyethyl ethylenediamine, sodium carbonate and rhamnolipid. An oil sludge cleaning method comprises the following steps: Step I, adding the oil sludge cleaning agent into oil sludge to be treated for primary thermochemical cleaning, then stewing to enable a mixed system to be divided into three layers: the upper layer being cleaned crude oil, the middle layer being a water layer and the lower layerbeing a sludge and water system, performing centrifugal separation on the sludge and water system after the sludge and water system is filtered, and collecting centrifugated sludge; Step II, mixing the collected sludge with clean water, adding the emulsifier for secondary thermochemical cleaning, and then performing centrifugal separation, thus obtaining clean sludge. According to the oil sludge cleaning agent cooperating with the oil sludge cleaning method, a brand-new technical solution for twice thermochemical cleaning is adopted, so that the oil sludge cleaning efficiency is improved.

Description

technical field

[0001] The invention belongs to the field of petrochemical environmental protection, and in particular relates to a high-efficiency oil sludge cleaning agent system and a process method for treating oil sludge. Background technique

[0002] Oilfield sludge mainly comes from landed sludge, tank sludge, and scum bottom sludge. Among them, the oil tank sludge and scum bottom sludge are primary fine muddy sludge separated from the process of oil recovery and produced fluid treatment. Sludge has complex components, high oil content, and poor fluidity. Direct discharge of untreated sludge will pollute the environment. If it is not treated or handled improperly, it will not only cause serious pollution to the environment, but also be a great waste of oil resources. Direct discharge of oily sludge will pollute surrounding water sources, air and cultivated land, and even bring heavy economic burdens to oil companies.

[0003] In particular, heavy oil oilfields brin...

Examples

Embodiment 1

[0025] A high-efficiency sludge cleaning agent, comprising a soil eluent and an emulsifier; the raw material mass percentage of the soil eluent consists of 3% sodium sulfate, 2.5% limonene, 0.3% citric acid, propylene bis(octadecyl di Methyl ammonium chloride) 1%, water 93.2%; The raw material mass percent of emulsifier is composed of fatty alcohol polyoxyethylene ether (AEO-9) 10%, hydroxyethyl ethylenediamine 20%, sodium carbonate 55%, mouse Li glycolipid 15%.

Embodiment 2

[0027] A high-efficiency sludge cleaning agent, comprising a soil eluent and an emulsifier; the raw material mass percentage of the soil eluent consists of 5% sodium sulfate, 5% limonene, 0.5% oxalic acid, propylene bis(octadecyl dimethyl ammonium chloride) 2%, water 87.5%; the raw material mass percent of emulsifier is composed of fatty alcohol polyoxyethylene ether (AEO-9) 15%, hydroxyethyl ethylenediamine 10%, sodium carbonate 50%, cascara Glycolipids 25%.

Embodiment 3

[0029] A method of using the oil sludge cleaning agent of Example 1: in the first cleaning container (cleaning tank) with a mechanical stirring device, add the oil sludge to be treated and the soil eluent at a mass ratio of 1:4, and heat it at a temperature of 75 ° C. , under the condition of stirring speed of 500rpm, after stirring for 0.5-1h, keep it at constant temperature for 0.5-1h, the mixed system is divided into three layers, the upper layer is the crude oil washed out, the middle layer is the water layer, and the lower layer is the muddy water system; take the upper layer of crude oil and To be recovered, the muddy water system is filtered with a screen to remove large-sized stones, organic matter and other sundries in the sludge. The filtered muddy water system is subjected to high-speed centrifugation, and the water phase obtained by centrifugation is transported to the first cleaning tank for recycling. Collect the desorbed sludge in the lower layer after centrifuga...

technical field

[0001] The invention belongs to the field of petrochemical environmental protection, and in particular relates to a high-efficiency oil sludge cleaning agent system and a process method for treating oil sludge. Background technique

[0002] Oilfield sludge mainly comes from landed sludge, tank sludge, and scum bottom sludge. Among them, the oil tank sludge and scum bottom sludge are primary fine muddy sludge separated from the process of oil recovery and produced fluid treatment. Sludge has complex components, high oil content, and poor fluidity. Direct discharge of untreated sludge will pollute the environment. If it is not treated or handled improperly, it will not only cause serious pollution to the environment, but also be a great waste of oil resources. Direct discharge of oily sludge will pollute surrounding water sources, air and cultivated land, and even bring heavy economic burdens to oil companies.

[0003] In particular, heavy oil oilfields brin...

Examples

Embodiment 1

[0025] A high-efficiency sludge cleaning agent, comprising a soil eluent and an emulsifier; the raw material mass percentage of the soil eluent consists of 3% sodium sulfate, 2.5% limonene, 0.3% citric acid, propylene bis(octadecyl di Methyl ammonium chloride) 1%, water 93.2%; The raw material mass percent of emulsifier is composed of fatty alcohol polyoxyethylene ether (AEO-9) 10%, hydroxyethyl ethylenediamine 20%, sodium carbonate 55%, mouse Li glycolipid 15%.

Embodiment 2

[0027] A high-efficiency sludge cleaning agent, comprising a soil eluent and an emulsifier; the raw material mass percentage of the soil eluent consists of 5% sodium sulfate, 5% limonene, 0.5% oxalic acid, propylene bis(octadecyl dimethyl ammonium chloride) 2%, water 87.5%; the raw material mass percent of emulsifier is composed of fatty alcohol polyoxyethylene ether (AEO-9) 15%, hydroxyethyl ethylenediamine 10%, sodium carbonate 50%, cascara Glycolipids 25%.

Embodiment 3

[0029] A method of using the oil sludge cleaning agent of Example 1: in the first cleaning container (cleaning tank) with a mechanical stirring device, add the oil sludge to be treated and the soil eluent at a mass ratio of 1:4, and heat it at a temperature of 75 ° C. , under the condition of stirring speed of 500rpm, after stirring for 0.5-1h, keep it at constant temperature for 0.5-1h, the mixed system is divided into three layers, the upper layer is the crude oil washed out, the middle layer is the water layer, and the lower layer is the muddy water system; take the upper layer of crude oil and To be recovered, the muddy water system is filtered with a screen to remove large-sized stones, organic matter and other sundries in the sludge. The filtered muddy water system is subjected to high-speed centrifugation, and the water phase obtained by centrifugation is transported to the first cleaning tank for recycling. Collect the desorbed sludge in the lower layer after centrifuga...

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