CN111575122A - Oil sludge cleaning agent and preparation method and application thereof - Google Patents
Oil sludge cleaning agent and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/825—Mixtures of compounds all of which are non-ionic
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/044—Hydroxides or bases
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/08—Silicates
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/10—Carbonates ; Bicarbonates
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/78—Neutral esters of acids of phosphorus
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Abstract
The invention belongs to the technical field of oil sludge cleaning, and particularly relates to an oil sludge cleaning agent, and a preparation method and application thereof. The oil sludge cleaning agent comprises the following components in percentage by mass: 5-20% of phosphate, 5-20% of inorganic salt, 10-20% of silicate, 2-5% of alkali, 2-4% of coconut oil fatty acid diethanolamide, 2-4% of nonylphenol polyoxyethylene ether, 2-4% of fatty alcohol polyoxyethylene ether phosphate, 2-4% of oil stain gripping agent and the balance of water. The oil sludge cleaning agent disclosed by the invention is high in oil washing rate, low in requirement on oil sludge property and wide in applicability.
Description
Technical Field
The invention belongs to the technical field of oil sludge cleaning, and particularly relates to an oil sludge cleaning agent, and a preparation method and application thereof.
Background
Oily sludge, referred to as oil sludge for short, is an oily solid waste produced in the processes of oil extraction, transportation, refining and oily sewage treatment. In the petrochemical industry, oil sludge pollution has become a major pollutant that harms the environment and has been classified as a hazardous solid waste. The oil sludge is sticky, has high oil content, fine particles, serious partial emulsification and complex components, contains a large amount of aged heavy oil, wax, asphaltene, colloid, solid suspended matters, bacteria, salts, acid gas, corrosion products and the like, and is difficult to realize multiphase separation in water, thereby increasing the treatment difficulty and the cost. Meanwhile, the oil-containing composite material has high comprehensive utilization value due to extremely high oil content.
The existing methods for treating the oil sludge comprise steam stripping, heating and settling, burning, adding chemical agents and the like. The recovery rate of the existing methods such as steam stripping, heating and settling and the like is very low; the incineration method causes a great deal of resource waste and has high treatment cost; the method for adding chemical agents relates to the problems of screening of agents, material transfer, separation and the like. In the prior art, research on chemical agents is continuously advancing, for example:
patent document CN106277709A discloses an environment-friendly cleaning agent for treating oily sludge, which comprises the following components in percentage by mass: 5-20 wt% of etherified carboxylate surfactant, 5-15 wt% of sodium dodecyl benzene sulfonate, 1-5 wt% of potassium lauryl alcohol ether phosphate, 1-5 wt% of inorganic salt and 45-88 wt% of water, wherein the sum of the contents of all the components is 100 wt%. The oil sludge cleaning agent has the advantages of good cleaning effect, high oil recovery rate, low production cost, environmental protection, simple preparation method and wide application range.
Patent document with publication number CN110628523A discloses an oil sludge cleaning agent and a preparation method thereof, which comprises the following raw materials by weight percent: 0.1-20% of nonionic surfactant, 0.1-3% of cationic surfactant, 1-20% of solubilizer, 1-35% of sodium hydroxide and the balance of water. The oil sludge cleaning agent has low oil sludge treatment temperature, high oil washing rate up to more than 95 percent, good dispersion and solubilization effects and no environmental pollution.
Patent document No. CN110937778A discloses a method for preparing a sludge cleaning agent, which comprises the following steps: mixing 50-80 parts of water, 2-5 parts of sodium dodecyl benzene sulfonate, 2-5 parts of octyl decyl glucoside, 2-5 parts of sodium lignin sulfonate and 0.5-2 parts of a dispersing agent in parts by weight, heating to 55-65 ℃, and stirring for reacting for 1-2 hours to obtain a solution 1; and adding 1-10 parts of phosphate, 1-10 parts of silicate, 0.5-2 parts of inorganic salt and 1-5 parts of alkali into the solution 1, and stirring for reacting for 1-3 hours to obtain the liquid oil sludge cleaning agent. The cleaning agent is added into the oil sludge, the addition amount of the cleaning agent for the oil sludge is 1-10% of the mass of the oil sludge, and three-phase separation of oil, water and sludge is achieved through stirring and centrifuging steps. The oil sludge cleaning agent has the advantages of high oil sludge separation efficiency, low cost, wide applicability and the like.
However, the oil-washing rate of the conventional sludge cleaning agent in the practical application of sludge treatment is yet to be further improved.
Disclosure of Invention
Based on the defects in the prior art, the invention provides an oil sludge cleaning agent and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil sludge cleaning agent comprises the following components in percentage by mass: 5-20% of phosphate, 5-20% of inorganic salt, 10-20% of silicate, 2-5% of alkali, 2-4% of coconut oil fatty acid diethanolamide, 2-4% of nonylphenol polyoxyethylene ether, 2-4% of fatty alcohol polyoxyethylene ether phosphate, 2-4% of oil stain gripping agent and the balance of water.
Preferably, the oil sludge cleaning agent comprises the following components in percentage by mass: 15% of phosphate, 10% of inorganic salt, 15% of silicate, 2% of alkali, 3% of coconut oil fatty acid diethanolamide, 2% of nonylphenol polyoxyethylene ether, 2% of fatty alcohol polyoxyethylene ether phosphate, 3% of an oil stain gripping agent and the balance of water.
Preferably, the phosphate is one or more selected from sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate and trisodium phosphate.
Preferably, the inorganic salt is selected from one or more of sodium carbonate, sodium bicarbonate, potassium carbonate, sodium chloride and sodium citrate.
Preferably, the silicate is one or more of sodium silicate and sodium metasilicate.
Preferably, the alkali is one or more of industrial liquid alkali, sodium hydroxide and potassium hydroxide.
Preferably, the oil stain gripping agent is polyoxyvinyl butenyl amide which is a polymeric isomeric alcohol.
As a preferred scheme, the type of the fatty alcohol polyoxyethylene ether phosphate is AEO-9P.
The present invention also provides a method for preparing the sludge cleaning agent according to any one of the above embodiments, comprising:
adding phosphate, inorganic salt, silicate, alkali, coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether phosphate and an oil stain creeping agent into water, and stirring and dissolving to obtain the oil sludge cleaning agent.
Preferably, the stirring is performed by heating.
The invention also provides an application of the oil sludge cleaning agent in any scheme, wherein the oil sludge cleaning agent and water are added into oil sludge, stirred for 30-60 min at 70-80 ℃, and then centrifuged to realize three-phase separation of oil, water and sludge; wherein the addition amount of the oil sludge cleaning agent is 1-12% of the mass of the oil sludge, and the mass of the oil sludge is as follows: the mass sum of the oil sludge cleaning agent and water is 1: 1.
compared with the prior art, the invention has the beneficial effects that:
(1) the oil sludge cleaning agent disclosed by the invention is high in oil washing rate, low in requirement on oil sludge property and wide in applicability.
(2) The oil sludge cleaning agent has the advantages of easily available preparation raw materials, simple preparation method, mild preparation conditions, low preparation cost, low energy consumption and energy conservation.
(3) When the oil sludge cleaning agent is applied, the adding amount is low, the oil sludge separation effect is good, the application cost is low, the recovered oil is thorough, and the resources are recycled.
Detailed Description
The technical solution of the present invention will be further explained by the following specific examples.
Example 1:
the oil sludge cleaning agent comprises the following components in percentage by mass:
10% of phosphate, 10% of inorganic salt, 15% of silicate, 3% of alkali, 2% of 6501 (coconut oil fatty acid diethanolamide), 2% of NP-10 (nonylphenol polyoxyethylene ether), 2% of AEO-9P (fatty alcohol polyoxyethylene ether phosphate), 2% of oil stain gripping agent (polymeric isomeric alcohol polyoxyethylene butenyl amide) and 54% of water.
The preparation method of the sludge cleaning agent comprises the following steps:
adding 10% of phosphate, 10% of inorganic salt, 15% of silicate, 3% of alkali, 2% of 6501 (coconut oil fatty acid diethanolamide), 2% of NP-10 (nonylphenol polyoxyethylene ether), 2% of AEO-9P (fatty alcohol polyoxyethylene ether phosphate) and 2% of oil stain gripping agent (polymeric isomeric alcohol polyoxyethylene butenyl amide) into 54% of water, and stirring for reacting for 1h to obtain the liquid-soluble oil sludge cleaning agent.
In the embodiment, sodium pyrophosphate is used as the phosphate, sodium carbonate is used as the inorganic salt, sodium silicate is used as the silicate, and industrial liquid alkali is used as the alkali.
The application of the sludge cleaning agent in the embodiment is specifically as follows:
the oil sludge cleaning agent prepared by the embodiment is applied to oil sludge treatment of an oil field. Wherein, the oil field oil sludge comprises the following components: oil content 35%, water content 15%, solid content 50%.
Adding 5% of an oil sludge cleaning agent, adding water accounting for 95% of the oil sludge, carrying out water bath stirring reaction at 70 ℃ for 40min, after the stirring reaction is finished, filling the solution into a centrifuge tube, centrifuging for 3min while hot under the condition that the rotation speed is 3000r/min, taking out the centrifuge tube, cooling, solidifying upper oil, scraping out oil, pouring out water, and achieving three-phase separation of oil, water and sludge. Wherein, the oil content in the silt (dry basis) is less than 1 percent.
Example 2:
the oil sludge cleaning agent comprises the following components in percentage by mass:
15% of phosphate, 10% of inorganic salt, 15% of silicate, 2% of alkali, 3% of 6501 (coconut oil fatty acid diethanolamide), 2% of NP-10 (nonylphenol polyoxyethylene ether), 2% of AEO-9P (fatty alcohol polyoxyethylene ether phosphate), 3% of oil stain gripping agent (polymeric isomeric alcohol polyoxyethylene butenyl amide) and 48% of water.
The preparation method of the sludge cleaning agent comprises the following steps:
adding 15% of phosphate, 10% of inorganic salt, 15% of silicate, 2% of alkali, 3% of 6501 (coconut oil fatty acid diethanolamide), 2% of NP-10 (nonylphenol polyoxyethylene ether), 2% of AEO-9P (fatty alcohol polyoxyethylene ether phosphate) and 3% of oil stain gripping agent (polymeric isomeric alcohol polyoxyethylene butenyl amide) into 48% of water, and stirring for reacting for 1h to obtain the liquid-soluble oil sludge cleaning agent.
In the embodiment, sodium pyrophosphate is used as the phosphate, sodium carbonate is used as the inorganic salt, sodium silicate is used as the silicate, and industrial liquid alkali is used as the alkali.
The application of the sludge cleaning agent in the embodiment is specifically as follows:
the oil sludge cleaning agent prepared by the embodiment is applied to oil sludge treatment of an oil field. Wherein, the oil field oil sludge comprises the following components: 60% of oil content, 32% of water content and 8% of solid content.
The adding amount of the oil sludge cleaning agent is 8% of the mass of the oil sludge, water with the mass of 92% of the mass of the oil sludge is added, after the completion of the stirring reaction, the mixture is stirred and reacted for 60min in a water bath at 80 ℃, after the stirring reaction is finished, the solution is filled into a centrifuge tube, the centrifuge tube is centrifuged for 3min when the solution is hot under the condition that the rotating speed is 3500r/min, the centrifuge tube is taken out, the centrifuge tube is cooled, after the upper layer oil is solidified, the oil is scraped out, the water is poured out, and the three. Wherein, the oil content in the silt (dry basis) is less than 1 percent.
Example 3:
the oil sludge cleaning agent comprises the following components in percentage by mass:
10% of phosphate, 10% of inorganic salt, 16% of silicate, 3% of alkali, 2% of 6501 (coconut oil fatty acid diethanolamide), 3% of NP-10 (nonylphenol polyoxyethylene ether), 4% of AEO-9P (fatty alcohol polyoxyethylene ether phosphate), 2% of oil stain gripping agent (polymeric isomeric alcohol polyoxyethylene butenyl amide) and 50% of water.
The preparation method of the sludge cleaning agent comprises the following steps:
adding 10% of phosphate, 10% of inorganic salt, 16% of silicate, 3% of alkali, 2% of 6501 (coconut oil fatty acid diethanolamide), 3% of NP-10 (nonylphenol polyoxyethylene ether), 4% of AEO-9P (fatty alcohol polyoxyethylene ether phosphate) and 2% of oil stain gripping agent (polymerized isomeric alcohol polyoxyethylene butenyl amide) into 50% of water, and stirring for reacting for 1h to obtain the liquid-soluble oil sludge cleaning agent.
In the embodiment, sodium pyrophosphate is used as the phosphate, sodium carbonate is used as the inorganic salt, sodium silicate is used as the silicate, and industrial liquid alkali is used as the alkali.
The application of the sludge cleaning agent in the embodiment is specifically as follows:
the oil sludge cleaning agent prepared by the embodiment is applied to oil sludge treatment of an oil field. Wherein, the oil field oil sludge comprises the following components: 55% of oil content, 25% of water content and 20% of solid content.
The adding amount of the oil sludge cleaning agent is 6% of the mass of the oil sludge, water with the mass of 94% of the mass of the oil sludge is added, after the stirring reaction is finished, the water bath stirring reaction is carried out for 60min at the temperature of 80 ℃, after the stirring reaction is finished, the solution is filled into a centrifuge tube, the centrifuge tube is centrifuged for 5min when the solution is hot under the condition that the rotating speed is 3000r/min, the centrifuge tube is taken out, the centrifuge tube is cooled, after the upper oil is solidified, the oil is scraped out, the water is poured out, the three-phase separation of oil, water and mud is achieved, and the.
Comparative example 1:
the cleaning agent for oil sludge of the comparative example adopts an environment-friendly cleaning agent for treating oily sludge disclosed in patent document with publication number CN110628523A, and consists of 0.1-20% of nonionic surfactant, 0.1-3% of cationic surfactant, 1-20% of solubilizer, 1-35% of sodium hydroxide and the balance of water.
Wherein the nonionic surfactant is one of alkyl glycoside and JFC; the cationic surfactant is one or more of cationic polyacrylamide and dodecyl dimethyl benzyl ammonium chloride; the solubilizer is one of methanol and dimethyl silicone oil.
The proportion with the best oil sludge cleaning effect is selected as the oil sludge cleaning agent of the comparative example.
The application of the sludge cleaning agent of the comparative example is as follows:
the sludge cleaning agent of the comparative example was applied to oil field sludge treatment. Wherein the oil sludge comprises the following components: oil content 35%, water content 15%, solid content 50%.
Adding 5% of the oil sludge cleaning agent, adding water accounting for 95% of the oil sludge, carrying out water bath stirring reaction at 70 ℃ for 40min, after the stirring reaction is finished, filling the solution into a centrifuge tube, centrifuging for 3min while hot under the condition that the rotation speed is 3000r/min, taking out the centrifuge tube, cooling, solidifying the upper oil, scraping out the oil, pouring out the water, and achieving three-phase separation of oil, water and sludge. Wherein, the oil content in the silt (dry basis) is 5 percent.
Comparative example 2:
the oil sludge cleaning agent of the comparative example adopts an environment-friendly cleaning agent for treating oily sludge disclosed in patent document with publication number CN106277709A, and is prepared by mixing the following raw material components in percentage by mass: 5-20% of etherified carboxylate surfactant, 5-15% of sodium dodecyl benzene sulfonate, 1-5% of potassium lauryl alcohol ether phosphate, 1-5% of inorganic salt and 45-88% of water, wherein the sum of the contents of all the components is 100%.
The proportion with the best oil sludge cleaning effect is selected as the cleaning agent of the comparative example.
The application of the cleaning agent of the comparative example is as follows:
the cleaning agent of the comparative example was applied to oil field sludge treatment. Wherein, the oil field oil sludge comprises the following components: 60% of oil content, 32% of water content and 8% of solid content.
The addition amount of the cleaning agent is 8% of the mass of the oil sludge, water accounting for 92% of the mass of the oil sludge is added, after the completion of the stirring reaction, the mixture is stirred and reacted for 60min in a water bath at 80 ℃, after the stirring reaction is finished, the solution is filled into a centrifugal tube, the centrifugal tube is centrifuged for 3min when the solution is hot under the condition that the rotation speed is 3500r/min, the centrifugal tube is taken out, the centrifugal tube is cooled, after the upper layer oil is solidified, the oil is scraped out, the water is poured out, and the three-phase. Wherein, the oil content in the silt (dry basis) is 6 percent.
Comparative example 3:
the sludge cleaning agent of the comparative example is a sludge cleaning agent disclosed in patent document with publication number CN110937778A, 50-80 parts of water, 2-5 parts of sodium dodecyl benzene sulfonate, 2-5 parts of octyl decyl glucoside, 2-5 parts of sodium lignin sulfonate and 0.5-2 parts of dispersant (one of dispersant MF and dispersant NNO) are mixed by weight parts, heated to 60 ℃ and stirred for reaction for 1 hour to obtain a solution 1; adding 1-10 parts of phosphate (one of sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate and trisodium phosphate), 1-10 parts of sodium silicate (one of silicon, sodium silicate and sodium metasilicate), 0.5-2 parts of inorganic salt (one of sodium chloride, sodium sulfate, sodium carbonate, sodium citrate and disodium ethylene diamine tetraacetate) and 1-5 parts of alkali (one of liquid alkali, sodium hydroxide and potassium hydroxide) into the solution 1, and stirring for reacting for 2 hours to obtain the liquid sludge cleaning agent.
The proportion with the best oil sludge cleaning effect is selected as the oil sludge cleaning agent of the comparative example.
The application of the sludge cleaning agent of the comparative example is as follows:
the sludge cleaning agent of the comparative example was applied to oil field sludge treatment. Wherein, the oil field oil sludge comprises the following components: 55% of oil content, 25% of water content and 20% of solid content.
The adding amount of the oil sludge cleaning agent is 6% of the mass of the oil sludge, water with the mass of 94% of the mass of the oil sludge is added, after the completion of the stirring reaction, the mixture is stirred and reacted for 60min in a water bath at 80 ℃, after the stirring reaction is finished, the solution is put into a centrifuge tube, the centrifuge tube is centrifuged for 5min when the solution is hot under the condition that the rotating speed is 3000r/min, the centrifuge tube is taken out, the centrifuge tube is cooled, after the upper layer oil is solidified, the oil is scraped out, the water is poured out, and the. Wherein, the oil content in silt (dry basis) is 3 percent.
The wash oil data for each of the above examples and comparative examples are compared as shown in table 1.
TABLE 1 oil wash data for sludge cleaning products of examples 1-3 and comparative examples 1-3
| Numbering | Initial oil content | Oil content after treatment | Oil washing rate |
| Example 1 | 35％ | ＜1％ | 97.1％ |
| Example 2 | 60％ | ＜1％ | 98.3％ |
| Example 3 | 55％ | ＜1％ | 98.2％ |
| Comparative example 1 | 35％ | 5％ | 85.7％ |
| Comparative example 2 | 60％ | 6％ | 90.0％ |
| Comparative example 3 | 55％ | 3％ | 94.5％ |
In the above embodiments and alternatives, the phosphate may be one of sodium tripolyphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, and trisodium phosphate, and may be a plurality of sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, and trisodium phosphate.
In the above embodiments and alternatives, the mass percentage of the phosphate may also be 5%, 8%, 12%, 18%, 20%, etc.
In the above embodiments and their alternatives, the inorganic salt may also be one of sodium bicarbonate, potassium carbonate, sodium chloride, and sodium citrate, or multiple of sodium carbonate, sodium bicarbonate, potassium carbonate, sodium chloride, and sodium citrate.
In the above embodiments and alternatives, the mass percentage of the inorganic salt may also be 5%, 8%, 12%, 18%, 20%, etc.
In the above embodiments and alternatives, the silicate may also be selected from sodium metasilicate and a combination of sodium silicate and sodium metasilicate.
In the above embodiments and alternatives, the mass percentage of silicate may also be 10%, 12%, 14%, 18%, 20%, etc.
In the above embodiments and their alternatives, the alkali may be one of sodium hydroxide and potassium hydroxide, or may be several of industrial liquid alkali, sodium hydroxide and potassium hydroxide.
In the above embodiments and alternatives thereof, the mass percentage of the base may also be 2.5%, 3.5%, 4%, 4.5%, 5%, etc.
In the above embodiments and alternatives, the coconut oil fatty acid diethanolamide may also be present in 2.5%, 3.5%, 4%, etc. by mass.
In the above embodiments and alternatives, the mass percentage of the nonylphenol polyoxyethylene ether may also be 2.5%, 3.5%, 4%, etc.
In the above embodiment and its alternative, the mass percentage of the fatty alcohol-polyoxyethylene ether phosphate may also be 2.5%, 3%, 3.5%, 4%, etc.
In the above embodiment and its alternatives, the mass percentage of the oil stain gripping agent may also be 2.5%, 3.5%, 4%, etc.
In the above embodiments and their alternatives, the sludge-cleaning agent may be heated appropriately while stirring to promote dissolution during the preparation process.
In the above embodiments and alternatives, the sludge cleaning chemical may be added in an amount of 1%, 3%, 4%, 9%, 10%, 12%, etc. based on the mass of the oil sludge.
In the above embodiment and its alternative, the temperature of the sludge cleaning process may also be 72 ℃, 75 ℃, 78 ℃, etc., the stirring time may also be 30min, 35min, 45min, 50min, etc., the centrifugation speed may be selected from 2000-.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. The oil sludge cleaning agent is characterized by comprising the following components in percentage by mass: 5-20% of phosphate, 5-20% of inorganic salt, 10-20% of silicate, 2-5% of alkali, 2-4% of coconut oil fatty acid diethanolamide, 2-4% of nonylphenol polyoxyethylene ether, 2-4% of fatty alcohol polyoxyethylene ether phosphate, 2-4% of oil stain gripping agent and the balance of water.
2. The sludge cleaning agent as claimed in claim 1, which comprises the following components in percentage by mass: 15% of phosphate, 10% of inorganic salt, 15% of silicate, 2% of alkali, 3% of coconut oil fatty acid diethanolamide, 2% of nonylphenol polyoxyethylene ether, 2% of fatty alcohol polyoxyethylene ether phosphate, 3% of an oil stain gripping agent and the balance of water.
3. The sludge cleaning agent as claimed in claim 1, wherein said phosphate is selected from one or more of sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate and trisodium phosphate.
4. The sludge cleaning agent as claimed in claim 1, wherein said inorganic salt is selected from one or more of sodium carbonate, sodium bicarbonate, potassium carbonate, sodium chloride and sodium citrate.
5. The sludge cleaning agent as claimed in claim 1, wherein said silicate is one or more of sodium silicate and sodium metasilicate.
6. The sludge cleaning agent as claimed in claim 1, wherein the alkali is one or more of industrial liquid alkali, sodium hydroxide and potassium hydroxide.
7. The sludge cleaning agent as claimed in claim 1, wherein said oily soil gripping agent is polyoxyvinyl butenyl amide which is a polymeric isomeric alcohol.
8. A process for the preparation of a sludge cleaning agent according to any one of claims 1 to 7, comprising:
adding phosphate, inorganic salt, silicate, alkali, coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether phosphate and an oil stain creeping agent into water, and stirring and dissolving to obtain the oil sludge cleaning agent.
9. The method of claim 8, wherein the stirring is performed by heating.
10. The use of the sludge cleaning agent according to any one of claims 1 to 7, wherein the sludge cleaning agent and water are added to sludge, stirred at 70 to 80 ℃ for 30 to 60min, and then centrifuged to separate oil, water and sludge into three phases; wherein the addition amount of the oil sludge cleaning agent is 1-12% of the mass of the oil sludge, and the mass of the oil sludge is as follows: the mass sum of the oil sludge cleaning agent and water is 1: 1.
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