Recycled oily sludge recovery treatment washing liquid and treatment method

A treatment method and resource-based technology, which is applied in the treatment of oily sludge and the lotion field of resourceful treatment of oily sludge, can solve the problems of unconsidered solvent recovery, high treatment costs, solvent waste, etc., to avoid energy consumption , reduce processing costs, and reduce waste

Active Publication Date: 2013-05-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above treatment methods for oily sludge can achieve certain results, but the following problems generally exist: (1) Generally, higher treatment temperatures are required, and energy consumption is high, especially the pyroly

Method used

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  • Recycled oily sludge recovery treatment washing liquid and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The oily sludge used in this example was taken from a sludge storage tank of an oil refinery, and was treated by the method described in the present invention after pressure filtration and dehydration. The oil, water and sand contents of the oily sludge used are shown in Table 1. After analysis, it was found that the distillation range of the oil in the oily sludge was in the range of 150-290°C; 50g of the oily sludge was weighed.

[0026] ① Preparation of lotion: the lotion is composed of 1.0wt% anionic surfactant sodium dodecyl sulfate (SDS), 2.7wt% electrolyte HCl, 1.0wt% n-amyl alcohol and 95.3% water;

[0027] ②Removal of mud and sand: Weigh 100g of lotion according to the ratio of lotion to oily sludge mass ratio of 2:1, wash the aforementioned oily sludge at room temperature (about 23°C), stir for 10 minutes, and let it stand for separation. After layering, the solid phase was filtered out; dried at 105°C to constant weight, the oil content in the dry solid phase...

Embodiment 2

[0034] The oily sludge used in this example was taken from a sludge storage tank of an oil refinery, and was treated by the method described in the present invention after pressure filtration and dehydration. The oil, water and sand contents of the oily sludge used are shown in Table 1. After analysis, it was found that the distillation range of the oil in the oily sludge was in the range of 150-290°C; 50g of the oily sludge was weighed.

[0035]① Preparation of lotion: the lotion is composed of 2.4wt% anionic surfactant sodium dodecylbenzenesulfonate (SAS), 3.0wt% electrolyte HCl, 1.0wt% n-pentanol and 93.6% water;

[0036] ②Removal of mud and sand: Weigh 100g of lotion according to the ratio of lotion to oily sludge mass ratio of 2:1, wash the aforementioned oily sludge at room temperature (about 23°C), stir for 10 minutes, and let stand to separate. After layering, the solid phase was filtered out; dried at 105°C to constant weight, the oil content in the dry solid phase wa...

Embodiment 3

[0043] The oily sludge used in this example was taken from a sludge storage tank of an oil refinery, and was treated by the method described in the present invention after pressure filtration and dehydration. The contents of oil, water and sand in the oily sludge used are shown in Table 4. After analysis, it was found that the distillation range of the oil in the oily sludge was in the range of 230-370°C; 50g of the oily sludge was weighed.

[0044] Contents of oil, water and sand in the oily sludge in Table 4 Example 3

[0045] Oil content, wt%

Moisture content, wt%

Sand content, wt%

15.43

67.12

17.45

[0046] ① Preparation of lotion: the lotion is composed of 3.3wt% anionic surfactant sodium dodecyl sulfate (SDS), 1.1wt% cationic surfactant cetyltrimethylammonium bromide (CTAB), 1wt% The electrolyte HCl, the n-butanol of 3.1wt% and the water composition of 91.5%;

[0047] ②Removal of mud and sand: Take 125g of lotion according to the ...

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Abstract

The invention relates to recycled oily sludge recovery treatment washing liquid. The recycled oily sludge recovery treatment washing liquid comprises the following components in parts by weight: 1-6 parts of anionic surface active agent with HLB (Hydrophile-Lipophile Balance) number of 10-40, 0-5 parts of cationic surface active agent with HLB number of 8-20, 1-7 parts of n-butyl alcohol or n-amyl alcohol, 1-3 parts of electrolyte and 79-97 parts of water, wherein the anionic surface active agent is one or several of sulfate, sulfonate, carboxylate and organic phosphate salt, and the cationic surface active agent is one or more of quaternary ammonium salt and oxidized ammonium salt. The invention also discloses a recycled oily sludge resource treatment method. According to the recycled oily sludge resource treatment washing liquid and the recycled oily sludge resource treatment method, oil in oily sludge is recycled by means of the advantages of mutual phase inversion among a W/O type microemulsion, an O/W type microemulsion and a double successive type microemulsion; and the treatment method is carried out at a normal temperature, high energy consumption generated due to high-temperature treatment is avoided, the cyclic utilization of the washing liquid is realized, the solvent waste is reduced, and the treatment cost is further reduced.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a treatment method for oily sludge, in particular to a treatment method for oily sludge produced in the production process of petroleum and petrochemical industries; the invention also provides an oily sludge resource chemically treated lotion. Background technique [0002] Oily sludge is oily solid waste produced during oil extraction, transportation, refining and oily sewage treatment. The oil content in oily sludge is 10-50%, and the water content is 40-90%. In my country's petroleum and petrochemical industry, an average of 1 to 2 million tons of oily sludge is produced every year. These oily sludges contain a large amount of toxic substances with foul odors such as benzene series, phenols, anthracene, and pyrene. At present, oily sludge is generally discharged to the sludge tank for storage, and a part of the sludge is brought into the sewage treatment ...

Claims

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Application Information

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IPC IPC(8): C02F11/00
Inventor 刘会娥丁传芹陈爽齐选良
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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