EMULSION-TYPE WATER-BASED DETERGENT FOR OILY SLUDGE, PREPARATION METHOD AND USE METHOD THEREOF

Abstract

The present invention discloses an emulsion-type water-based detergent for oily sludge, and a preparation method and use method thereof. The emulsion-type water-based detergent includes components in the following mass percentage contents: 2-10 parts of surfactant, 3-10 parts of oil-soluble component and the balance being aqueous phase, based on 100 parts by weight. The preparation method includes: stirring the surfactant, the oil-soluble component and the aqueous phase to mix uniformly to obtain a homogeneous and stable emulsion-type water-based detergent at room temperature. During use, the oily sludge is first mixed with the emulsion-type water-based detergent and stirred under a certain temperature; mixture is subjected to oil-water-solid three-phase separation after the washing is completed; and at last, solid phase is rinsed with hot water under the same temperature.

Claims

1. An emulsion-type water-based detergent for oily sludge, comprising 2-10 parts of surfactant, 3-10 parts of oil-soluble component and the balance being aqueous phase, based on 100 parts by weight.

2. The emulsion-type water-based detergent for the oily sludge according to claim 1, wherein the surfactant comprises sodium fatty alcohol-polyoxyethylene ether sulfate (AES) and super-amphiphilic molecular emulsifier, and the mass ratio of the AES to the super-amphiphilic molecular emulsifier is 1:4-4:1.

3. The emulsion-type water-based detergent for the oily sludge according to claim 1, wherein the surfactant comprises the AES and the super-amphiphilic molecular emulsifier, and the mass ratio of the AES to the super-amphiphilic molecular emulsifier is 1:1-2:1.

4. The emulsion-type water-based detergent for the oily sludge according to claim 1, wherein the oil-soluble component is methylbenzene, dimethylbenzene, mixed benzene, diesel oil, paraffin oil or gas-to-liquid.

5. The emulsion-type water-based detergent for the oily sludge according to claim 1, wherein the aqueous phase is pure water, or NaCl solution having a concentration of less than 1 wt %, or CaCl.sub.2 solution having a concentration of less than 0.1 wt %, or NaCl and CaCl.sub.2 mixed solution having a concentration of NaCl being less than 1 wt % and the concentration of CaCl.sub.2 being less than 0.1 wt %.

6. A method for preparing the emulsion-type water-based detergent for the oily sludge according to claim 1, comprising the following steps: based on 100 parts by weight, weighing 2-10 parts of surfactant, 3-10 parts of oil-soluble component and the balance being aqueous phase; and mixing the above components and stirring uniformly to obtain the homogeneous and stable emulsion-type water-based detergent.

7. The method for preparing the emulsion-type water-based detergent for the oily sludge according to claim 6, wherein the agitation speed is 150-500 rpm, the stirring time is 25-40 min, and the stirring temperature is room temperature.

8. A method for using the emulsion-type water-based detergent for the oily sludge according to claim 1, comprising the following steps: mixing the oily sludge with the emulsion-type water-based detergent according to a mass ratio of 1:3-1:8, stirring under 60-80 C., washing the oily sludge, subjecting a mixture to oil-water-solid three-phase separation after the washing is completed, and at last, rinsing a solid phase with hot water under the same temperature.

9. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 8, wherein the stirring time is 10-40 min, and the agitation speed is 200-500 rpm.

10. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 8, wherein the rotational speed in the three-phase separation is 1500-2500 rpm.

11. A method for using the emulsion-type water-based detergent for the oily sludge according to claim 2, comprising the following steps: mixing the oily sludge with the emulsion-type water-based detergent according to a mass ratio of 1:3-1:8, stirring under 60-80 C., washing the oily sludge, subjecting a mixture to oil-water-solid three-phase separation after the washing is completed, and at last, rinsing a solid phase with hot water under the same temperature.

12. A method for using the emulsion-type water-based detergent for the oily sludge according to claim 3, comprising the following steps: mixing the oily sludge with the emulsion-type water-based detergent according to a mass ratio of 1:3-1:8, stirring under 60-80 C., washing the oily sludge, subjecting a mixture to oil-water-solid three-phase separation after the washing is completed, and at last, rinsing a solid phase with hot water under the same temperature.

13. A method for using the emulsion-type water-based detergent for the oily sludge according to claim 4, comprising the following steps: mixing the oily sludge with the emulsion-type water-based detergent according to a mass ratio of 1:3-1:8, stirring under 60-80 C., washing the oily sludge, subjecting a mixture to oil-water-solid three-phase separation after the washing is completed, and at last, rinsing a solid phase with hot water under the same temperature.

14. A method for using the emulsion-type water-based detergent for the oily sludge according to claim 5, comprising the following steps: mixing the oily sludge with the emulsion-type water-based detergent according to a mass ratio of 1:3-1:8, stirring under 60-80 C., washing the oily sludge, subjecting a mixture to oil-water-solid three-phase separation after the washing is completed, and at last, rinsing a solid phase with hot water under the same temperature.

15. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 9, wherein the stirring time is 10-40 min, and the agitation speed is 200-500 rpm.

16. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 10, wherein the stirring time is 10-40 min, and the agitation speed is 200-500 rpm.

17. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 11, wherein the stirring time is 10-40 min, and the agitation speed is 200-500 rpm.

18. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 12, wherein the stirring time is 10-40 min, and the agitation speed is 200-500 rpm.

19. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 9, wherein the rotational speed in the three-phase separation is 1500-2500 rpm.

20. The method for using the emulsion-type water-based detergent for the oily sludge according to claim 10, wherein the rotational speed in the three-phase separation is 1500-2500 rpm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a sample diagram of an emulsion-type water-based detergent for oily sludge prepared in an embodiment 1 of the present invention.

[0017] FIG. 2 is a comparison diagram of a use effect in an embodiment 1 of the present invention, (a) original picture of oily sludge, and (b) picture of oily sludge after treatment.

[0018] FIG. 3 is a comparison diagram of a use effect in an embodiment 5 of the present invention, (a) original picture of oily sludge, and (b) picture of oily sludge after treatment.

DETAILED DESCRIPTION

Embodiment 1

[0019] Based on 100 parts by weight, 5 parts of AES and 5 parts of super-amphiphilic molecular emulsifier according to a mass ratio of 1:1, 10 parts of methylbenzene and 80 parts of pure water were weighed respectively, put into a reactor sequentially, and stirred for 40 min at agitation speed of 500 rpm under room temperature to form a homogeneous and stable emulsion-type water-based detergent, with a sample shown in FIG. 1.

[0020] The oily sludge was taken from the Liaohe oilfield, with the initial parameters including 57.20% of oil content, 38.98% of solid content and 3.82% of water content (all percentage contents were based on the weight), and the macrophotograph shown in FIG. 2(a).

[0021] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:4; the detergent was used for washing the oily sludge twice, 30 min for each time, at an agitation speed of 500 rpm under 80 C.; then, hot water with 80 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 2500 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0022] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0023] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0024] The washing results are shown in the table below, and the treated sludge is shown in FIG. 2(b).

TABLE-US-00001 Initial oil content/% 57.20 Residual oil ratio/% (g/100 g 0.33 of dry sludge) Oil removal efficiency/% 99.78

[0025] Pursuant to a local standard of DB23/T1413-2010 Pollution Control Standard for Comprehensive Utilization of Oilfield Oily Sludge issued by the Heilongjiang Provincial Bureau of Quality and Technical Supervision, the treated sludge may be used for a well road and a well padding site.

Embodiment 2

[0026] Based on 100 parts by weight, 6 parts of AES and super-amphiphilic molecular emulsifier according to a mass ratio of 2:1 or 1:4 or 4:1 (the AES and the super-amphiphilic molecular emulsifier were respectively 4 parts and 2 parts, 1.2 parts and 4.8 parts, and 4.8 parts and 1.2 parts), 8.5 parts of methylbenzene and 85.5 parts of pure water were weighed.

[0027] The surfactant, the methylbenzene and the pure water were put into a reactor sequentially, and stirred for 30 min at an agitation speed of 300 rpm under a room temperature to form three emulsion-type water-based detergents having different mass ratios of the surfactant.

[0028] The oily sludge was taken from the Liaohe oilfield, with the initial parameters including 57.20% of oil content, 38.98% of solid content and 3.82% of water content (all percentage contents were based on the weight), and the macrophotograph shown in FIG. 2(a).

[0029] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:4; the detergent was used for washing the oily sludge twice, 30 min for each time, at an agitation speed of 350 rpm under 80 C.; then, hot water with 80 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 2000 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0030] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0031] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0032] The washing effects of the three emulsion-type water-based detergents having the different mass ratios of the surfactant to the oily sludge are shown in the table below.

TABLE-US-00002 Super-amphiphilic Residual oil ratio/% Mass molecular (g/100 g of Oil removal ratio AES/parts emulsifier/parts dry sludge) efficiency/% 2:1 4 2 0.71 99.52 1:4 1.2 4.8 1.74 98.81 4:1 4.8 1.2 2.45 98.33

Embodiment 3

[0033] Based on 100 parts by weight, 1 part of AES and 1 part of super-amphiphilic molecular emulsifier according to a mass ratio of 1:1, 3 parts of oil-soluble component and 95 parts of pure water were respectively weighed, where the oil-soluble component was mixed benzene or dimethylbenzene or paraffin oil or gas-to-liquid or diesel oil.

[0034] The AES, the super-amphiphilic molecular emulsifier, one oil-soluble component and the aqueous phase were put into a reactor sequentially, and stirred for 25 min at an agitation speed of 150 rpm under a room temperature to form five emulsion-type water-based detergents having different oil-soluble components.

[0035] The oily sludge was taken from the Shengli oilfield, with the initial parameters including 8.13% of oil content, 41.59% of solid content and 50.28% of water content, and the macrophotograph shown in FIG. 3(a).

[0036] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:4; the detergent was used for washing the oily sludge once, 10 min for each time, at an agitation speed of 300 rpm under 60 C.; then, hot water with 60 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 1500 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0037] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0038] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0039] The washing effects of the emulsion-type water-based detergents having the different oil-soluble components to the oily sludge are shown in the table below.

TABLE-US-00003 Oil-soluble Residual oil ratio/% Oil removal component (g/100 g of dry sludge) efficiency/% Mixed benzene 1.33 93.20 Dimethylbenzene 1.37 92.99 Paraffin oil 8.49 56.57 Gas-to-liquid 9.61 50.84 Diesel oil 11.14 43.01

Embodiment 4

[0040] Based on 100 parts by weight, 1 part of AES and 1 part of super-amphiphilic molecular emulsifier according to a mass ratio of 1:1, 3 parts of methylbenzene and 95 parts of pure water were respectively weighed, put into a reactor sequentially, and stirred for 25 min at an agitation speed of 250 rpm under a room temperature to form a homogeneous and stable emulsion-type water-based detergent.

[0041] The oily sludge was taken from the Shengli oilfield, with the initial parameters including 8.13% of oil content, 41.59% of solid content and 50.28% of water content, and the macrophotograph shown in FIG. 3(a).

[0042] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:3 or 1:5 or 1:8; the detergent was used for washing the oily sludge once, 10 min for each time, at an agitation speed of 200 rpm under 60 C.; then, hot water with 60 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 2000 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0043] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0044] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0045] The washing results of the oily sludge at different mass ratios of the oily sludge to the water-based detergent are shown in the table below.

TABLE-US-00004 Mass ratio of oily Residual oil ratio/% sludge to water-based (g/100 g of Oil removal detergent dry sludge) efficiency/% 1:3 1.48 92.43 1:5 1.10 94.37 1:8 0.56 97.14

Embodiment 5

[0046] Based on 100 parts by weight, 1 part of AES and 1 part of super-amphiphilic molecular emulsifier according to a mass ratio of 1:1, 3 parts of methylbenzene and 95 parts of pure water were respectively weighed, put into a reactor sequentially, and stirred for 25 min at an agitation speed of 250 rpm under a room temperature to form a homogeneous and stable emulsion-type water-based detergent.

[0047] The oily sludge was taken from the Shengli oilfield, with the initial parameters including 8.13% of oil content, 41.59% of solid content and 50.28% of water content, and the macrophotograph shown in FIG. 3(a).

[0048] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:4; the detergent was used for washing the oily sludge once, 40 min for each time, at an agitation speed of 200 rpm under 60 C.; then, hot water with 60 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 2000 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0049] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0050] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0051] The washing results of the oily sludge are shown in the table below, and the treated sludge is shown in FIG. 3(b).

TABLE-US-00005 Initial oil content/% 8.13 Residual oil ratio/% (g/100 g 1.74 of dry sludge) Oil removal efficiency/% 91.10

Embodiment 6

[0052] Based on 100 parts by weight, 2.25 parts of AES and 2.25 parts of super-amphiphilic molecular emulsifier according to a mass ratio of 1:1, 7 parts of methylbenzene and 88.5 parts of pure water were respectively weighed, put into a reactor sequentially, and stirred for 30 min at an agitation speed of 400 rpm under a room temperature to form a homogeneous and stable emulsion-type water-based detergent.

[0053] The oily sludge was taken from the Liaohe oilfield, with the initial parameters including 57.20% of oil content, 38.98% of solid content and 3.82% of water content (all percentage contents were based on the weight), and the macrophotograph shown in FIG. 2(a).

[0054] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:4; the detergent was used for washing the oily sludge twice, 30 min for each time, at an agitation speed of 300 rpm under 70 C.; then, hot water with 70 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 2000 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0055] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0056] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0057] The washing results of the oily sludge are shown in the table below.

TABLE-US-00006 Initial oil content/% 57.20 Residual oil ratio/% (g/100 g 1.21 of dry sludge) Oil removal efficiency/% 99.18

Embodiment 7

[0058] Based on 100 parts by weight, 2.2.5 parts of AES and 2.25 parts of super-amphiphilic molecular emulsifier according to a mass ratio of 1:1, 7 parts of methylbenzene and 88.5 parts of aqueous phase were respectively weighed. The aqueous phase was respectively a NaCl solution having a concentration of 0.3 wt %, NaCl solution having a concentration of 0.5 wt %, a NaCl solution having a concentration of 1.0 wt %, a CaCl.sub.2 solution having a concentration of 0.01 wt %, a CaCl.sub.2 solution having a concentration of 0.07 wt %, a CaCl.sub.2 solution having a concentration of 0.10 wt %, and mixed solution of NaCl and CaCl.sub.2 (in the mixed solution, the concentration of NaCl was 0.3 wt %, and the concentration of CaCl.sub.2 was 0.05 wt %).

[0059] The AES, the super-amphiphilic molecular emulsifier, the methylbenzene and one aqueous phase were put into a reactor sequentially, and stirred for 30 min at an agitation speed of 400 rpm under a room temperature to form seven emulsion-type water-based detergents having different aqueous phases.

[0060] The oily sludge was taken from the Liaohe oilfield, with the initial parameters including 57.20% of oil content, 38.98% of solid content and 3.82% of water content (all percentage contents were based on the weight), and the macrophotograph shown in FIG. 2(a).

[0061] Washing effect test: the mass ratio of the oily sludge to the water-based detergent was 1:4; the detergent was used for washing the oily sludge twice, 15 min for each time, at an agitation speed of 300 rpm under 60 C.; then, hot water with 60 C. was used for rinsing the oily sludge once, and whenever the washing of the detergent and the rinsing of the hot water were completed, a centrifugal machine was used for carrying out oil-water-solid three-phase separation (the rotational speed of the centrifugal machine was 2000 rpm, and the centrifuging time was 6 min); and at last, the sludge was dried under 1051 C. to measure its residual oil ratio. Where:

[0062] Instrument: infrared spectrometer oil content analyzer (Oil 460)

[0063] Extractant: carbon tetrachloride (Tianjin Guangfu Fine Chemical Research Institute (exclusive use for infrared oil measurement)).

[0064] The washing results of the emulsion-type water-based detergents having the different aqueous phases to the oily sludge are shown in the table below.

TABLE-US-00007 Residual oil ratio/% Oil removal Aqueous phase (g/100 g of dry sludge) efficiency/% 0.3 wt % NaCl solution 1.10 99.25 0.5 wt % NaCl solution 2.04 98.61 1.0 wt % NaCl solution 2.69 98.17 0.01 wt % CaCl.sub.2 solution 0.86 99.41 0.07 wt % CaCl.sub.2 solution 0.67 99.54 0.10 wt % CaCl.sub.2 solution 1.08 99.26 NaCl and CaCl.sub.2 mixed solution 0.91 99.38 (the concentration of NaCl is 0.3 wt %, and the concentration of CaCl.sub.2 is 0.05 wt %)

[0065] The above embodiments are preferred embodiments of the present invention. However, the embodiments of the present invention are not limited by the above embodiments. Any change, modification, combination, simplification, improvement and the like made without departing from the spiritual essence and principle of the present invention should be an equivalent replacement manner, and all are included in a protection scope of the present invention.