CN111234854A - Treatment method of oil sludge at bottom of crude oil storage tank - Google Patents
Treatment method of oil sludge at bottom of crude oil storage tank Download PDFInfo
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- CN111234854A CN111234854A CN201911190126.9A CN201911190126A CN111234854A CN 111234854 A CN111234854 A CN 111234854A CN 201911190126 A CN201911190126 A CN 201911190126A CN 111234854 A CN111234854 A CN 111234854A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for treating oil sludge at the bottom of a crude oil storage tank, which comprises the following steps: putting the oil sludge cleaned by the crude oil storage tank into a tempering tank, adding water and mixing the slurry to enable the water content of the oil sludge to reach 20-25%, adding water into the oil sludge while controlling the water adding amount by a metering pump, and reacting for 20-30min to obtain oil sludge; pumping the oil sludge into an oil sludge separation tank through a sludge pump, and filtering and separating through a filter screen, wherein the separation time is set to be 20-30 min; and transferring the crude oil separated by filtering to a crude oil tank, transferring the residual oil sludge with low oil content to a dangerous waste collection place, and carrying out centralized incineration treatment. The method for treating the tank bottom oil sludge provided by the invention has the advantages that the reaction conditions are simple, the operation is convenient, the physical method is used for realizing the rapid separation of the oil sludge according to the specific reaction sequence and the reaction conditions, the deoiling rate is up to more than 80%, the crude oil resources are saved, and the pollution of the oil sludge to the environment is reduced. In addition, the separated crude oil can be recovered for reuse.
Description
Technical Field
The invention belongs to the technical field of treatment of oil sludge at the bottom of a crude oil storage tank, and particularly relates to a treatment method of oil sludge at the bottom of the crude oil storage tank.
Background
When the crude oil is stored in the storage tank for a long time, inorganic impurities such as high-melting-point wax, asphaltene, colloid and entrained silt in the crude oil and water can be changed into precipitates together, and tank bottom oil sludge is formed at the bottom of the storage tank, so that the effective capacity of the storage tank is reduced; therefore, tank bottom sludge needs to be cleaned periodically.
The bottom mud of the oil tank contains about 25 percent of water and 5 percent of inorganic matters (such as silt sand), and the rest 70 percent of hydrocarbon (wherein, the asphaltene accounts for 7 to 8 percent, the paraffin accounts for 6 percent, and the ash accounts for 48 percent); meanwhile, the oil sludge contains various heavy metal ions and toxic and harmful organic matters, so that the environmental pollution is great. Therefore, the tank bottom sludge has been identified as a hazardous waste in the national hazardous waste list.
At present, the domestic treatment method of oily sludge mainly comprises incineration treatment, coking treatment, solvent extraction treatment and hot water washing treatment, and the treatment processes of the oily sludge have the defects that ① oil sludge concentration incineration process has high treatment cost, wastes resources, has high energy consumption and generates serious secondary pollution, ② chemical sludge directly influences the quality of a coke device product if mixed into an oil refinery coking device, an extractant in the ③ solvent extraction technology is generally expensive, so the extraction technology has high cost and is not actually applied to tank bottom oil sludge treatment, and ④ hot water washing treatment technology is mainly applied to treating ground oil sludge and has poor effect on crude oil tank bottom oil sludge containing high-melting-point wax, asphaltene and colloid.
The methods also have the defects of long treatment period, high treatment cost, resource waste and the like. The tank bottom oil sludge has high hydrocarbon content and is a good recyclable resource, and if effective recycling, reduction and harmless treatment are not adopted for the tank bottom oil sludge, a large amount of petroleum resources are lost, and the environment is polluted. Therefore, the method for treating the oil sludge at the bottom of the crude oil storage tank has the advantages that the oil sludge at the bottom of the tank can be subjected to reduction treatment, and effective resources can be stripped and further utilized.
Disclosure of Invention
The invention aims to provide a method for treating oil sludge at the bottom of a crude oil storage tank, which aims to solve the problems of long treatment period and resource waste of oil sludge at the bottom of the tank in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for treating oil sludge at the bottom of a crude oil storage tank comprises the following steps:
s1, putting the oil sludge cleaned out of the crude oil storage tank into a tempering tank, adding water and carrying out size mixing treatment to enable the water content of the oil sludge to reach 20-25%, controlling the water adding amount by using a metering pump while adding water to the oil sludge, adjusting the rotating speed of the tempering tank to 60-100r/min, carrying out stirring reaction at the reaction temperature of 50-70 ℃ for 20-30min, and obtaining oil sludge;
s2, pumping the oil sludge slurry obtained in the step S1 into an oil sludge separation tank through a sludge pump, and filtering and separating the oil sludge slurry through a filter screen, wherein the stirring speed is 60-100r/min, the temperature is 70-80 ℃, and the separation time is set to be 20-30min according to different oil sludge properties;
and S3, transferring the crude oil which is filtered and separated out in the S2 mode to a crude oil tank, transferring the residual oil sludge with low oil content to a dangerous waste collection place, and carrying out incineration treatment in a centralized mode.
Preferably, the aperture of the filter screen is set to be 35-45 meshes, especially to be 40 meshes.
Preferably, stirring is required during filtration in S3, and the purpose of stirring is to increase the fluidity of oil sludge at the bottom of the tank as much as possible by means of external force, so as to facilitate filtration and separation.
Preferably, the tank bottom fatlute has realized the minimizing treatment of fatlute effectively after filtering separation, can directly utilize the oil pump to draw away the oil reservoir from fatlute knockout drum lower part and get into crude oil tank or oil refining plant, and this oil pump is installed on the oil pipe, and the very low fatlute of oil content of filter screen bottommost opens the discharge opening after accomplishing filtering, utilizes the blowdown hoe to collude the fatlute and concentrates.
Preferably, the metering pump is installed to the water inlet of quenching and tempering jar, the charge door has been seted up to upper end one side of quenching and tempering jar, pipeline and fatlute knockout drum's upper end one side intercommunication is passed through to the bottom of quenching and tempering jar, and installs the sludge pump on the fatlute knockout drum.
Preferably, the internally mounted of fatlute knockout drum has the filter screen, the discharge opening has been seted up to one side of fatlute knockout drum, the discharge opening is located one side upper portion of filter screen, the bottom intercommunication of fatlute knockout drum has an oil pipe, install the valve on the oil pipe.
Preferably, the external surfaces of the tempering tank and the sludge separation tank are respectively provided with a heating jacket.
Preferably, the inside of quenching and tempering jar and sludge separation jar is installed the (mixing) shaft respectively, fixedly connected with stirring leaf on the (mixing) shaft, the agitator motor who is connected with the (mixing) shaft transmission is installed respectively at the top of quenching and tempering jar and sludge separation jar.
Preferably, the diameter of the discharge opening is not less than 20cm, and a sealing plug is arranged on the discharge opening.
The invention has the technical effects and advantages that: compared with the prior art, the treatment method of the oil sludge at the bottom of the crude oil storage tank has the following advantages:
1. compared with the incineration treatment method, the invention carries out reduction treatment on the tank bottom oil sludge, saves crude oil resources and reduces energy consumption; compared with a coking treatment method, the method has the advantages that the oil sludge at the bottom of the tank is separated, so that the influence of the sludge on the quality of a coking device product is reduced; compared with a solvent extraction treatment method, the treatment cost is reduced; compared with a hot water washing treatment method, the method is mainly applied to treating the tank bottom oil sludge containing high-melting-point wax, asphaltene, colloid and the like.
2. The method for treating the tank bottom oil sludge provided by the invention has the advantages that the reaction conditions are simple, the operation is convenient, the physical method is used for realizing the rapid separation of the oil sludge according to the specific reaction sequence and the reaction conditions, the deoiling rate is up to more than 80%, the crude oil resources are saved, and the pollution of the oil sludge to the environment is reduced. In addition, the separated crude oil can be recovered for reuse.
Drawings
FIG. 1 is a flow chart of a method for treating oil sludge at the bottom of a crude oil storage tank according to the present invention;
fig. 2 is a schematic structural diagram of a conditioning tank and an oil-sludge separation tank for oil-sludge treatment at the bottom of a crude oil storage tank according to the present invention.
In the figure: 1. a tempering tank; 2. a feed inlet; 3. a metering pump; 4. a heating jacket; 5. a sludge pump; 6. a delivery conduit; 7. an oil-sludge separation tank; 8. a discharge opening; 9. a filter screen; 10. an oil outlet pipe; 11. and (4) a valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A method for treating oil sludge at the bottom of a crude oil storage tank comprises the following steps:
s1, putting the oil sludge cleaned out of the crude oil storage tank into a tempering tank, adding water and carrying out size mixing treatment to enable the water content of the oil sludge to reach 20%, adding water into the oil sludge while controlling the water adding amount by a metering pump, adjusting the rotating speed of the tempering tank to 100r/min, carrying out stirring reaction at the reaction temperature of 50 ℃ for 20min, and obtaining oil slurry;
s2, pumping the oil sludge slurry obtained in the step S1 into an oil sludge separation tank through a sludge pump, and filtering and separating the oil sludge slurry through a filter screen, wherein the stirring speed is 60r/min, the temperature is 70 ℃, and the separation time is set to be 20min according to different oil sludge properties;
s3, transferring the crude oil which is filtered and separated by the S2 to a crude oil tank, transferring the residual oil sludge with low oil content to a dangerous waste collection place, carrying out centralized incineration treatment, stirring during filtering, wherein the stirring aims to increase the fluidity of the oil sludge at the tank bottom as much as possible by means of external force, and facilitating filtering and separation; tank bottoms fatlute has realized the minimizing of fatlute effectively after filtering separation, can directly utilize the oil pump to pump away the oil reservoir from fatlute knockout drum lower part and get into crude oil tank or oil refining equipment, and this oil pump is installed on the oil pipe, and the very low fatlute of oil content of filter screen bottommost is accomplishing the back of filtering, opens the discharge opening, utilizes the blowdown hoe to collude the fatlute and concentrate.
When the device is applied, the aperture of a selected filter screen 9 is set to be 40 meshes, a metering pump 3 is installed at a water inlet of a tempering tank 1, a feeding port 2 is formed in one side of the upper end of the tempering tank 1, the bottom of the tempering tank 1 is communicated with one side of the upper end of an oil sludge separation tank 7 through a conveying pipeline 6, and a sludge pump 5 is installed on the oil sludge separation tank 7. The internally mounted of fatlute knockout drum 7 has filter screen 9, and discharge opening 8 has been seted up to one side of fatlute knockout drum 7, and discharge opening 8 is located one side upper portion of filter screen 9, and the bottom intercommunication of fatlute knockout drum 7 has oil outlet pipe 10, installs valve 11 on the oil outlet pipe 10. The external surfaces of the conditioning tank 1 and the sludge separation tank 7 are provided with heating jackets 4, respectively. Stirring shafts are respectively arranged in the tempering tank 1 and the oil sludge separation tank 7, stirring blades are fixedly connected to the stirring shafts, and stirring motors in transmission connection with the stirring shafts are respectively arranged at the top of the tempering tank 1 and the oil sludge separation tank 7. The diameter of the discharge opening 8 is set to be not less than 20cm, and a sealing plug cover is arranged on the discharge opening 8.
Example 2
Unlike example 1, a method for treating sludge at the bottom of a crude oil storage tank comprises the following steps:
s1, putting the oil sludge cleaned out of the crude oil storage tank into a tempering tank, adding water and carrying out size mixing treatment to enable the water content of the oil sludge to reach 25%, adding water into the oil sludge, controlling the water adding amount by a metering pump, adjusting the rotating speed of the tempering tank to 60r/min, carrying out stirring reaction at the reaction temperature of 70 ℃ for 30min, and obtaining oil slurry;
s2, pumping the oil sludge slurry obtained in the step S1 into an oil sludge separation tank through a sludge pump, and filtering and separating the oil sludge slurry through a filter screen, wherein the stirring speed is 100r/min, the temperature is 80 ℃, and the separation time is set to be 30min according to different oil sludge properties;
s3, transferring the crude oil which is filtered and separated by the S2 to a crude oil tank, transferring the residual oil sludge with low oil content to a dangerous waste collection place, carrying out centralized incineration treatment, stirring during filtering, wherein the stirring aims to increase the fluidity of the oil sludge at the tank bottom as much as possible by means of external force, and facilitating filtering and separation; tank bottoms fatlute has realized the minimizing of fatlute effectively after filtering separation, can directly utilize the oil pump to pump away the oil reservoir from fatlute knockout drum lower part and get into crude oil tank or oil refining equipment, and this oil pump is installed on the oil pipe, and the very low fatlute of oil content of filter screen bottommost is accomplishing the back of filtering, opens the discharge opening, utilizes the blowdown hoe to collude the fatlute and concentrate.
Example 3
Unlike example 2, the method for treating the oil sludge at the bottom of the crude oil storage tank comprises the following steps:
s1, putting the oil sludge cleaned out of the crude oil storage tank into a tempering tank, adding water and carrying out size mixing treatment to enable the water content of the oil sludge to reach 23%, adding water into the oil sludge, controlling the water adding amount by a metering pump, adjusting the rotating speed of the tempering tank to 80r/min, carrying out stirring reaction at the reaction temperature of 60 ℃ for 25min, and obtaining oil slurry;
s2, pumping the oil sludge slurry obtained in the step S1 into an oil sludge separation tank through a sludge pump, and filtering and separating the oil sludge slurry through a filter screen, wherein the stirring speed is 80r/min, the temperature is 75 ℃, and the separation time is set to be 25min according to different oil sludge properties;
and S3, transferring the crude oil which is filtered and separated out in the S2 mode to a crude oil tank, transferring the residual oil sludge with low oil content to a dangerous waste collection place, and carrying out incineration treatment in a centralized mode.
Compared with an incineration treatment method, the treatment method of the oil sludge at the bottom of the crude oil storage tank has the advantages that the reduction treatment is carried out on the oil sludge at the bottom of the tank, crude oil resources are saved, and energy consumption is reduced; compared with a coking treatment method, the method has the advantages that the oil sludge at the bottom of the tank is separated, so that the influence of the sludge on the quality of a coking device product is reduced; compared with a solvent extraction treatment method, the treatment cost is reduced; compared with a hot water washing treatment method, the method is mainly applied to treating the tank bottom oil sludge containing high-melting-point wax, asphaltene, colloid and the like. The method for treating the tank bottom oil sludge provided by the invention has the advantages that the reaction conditions are simple, the operation is convenient, the physical method is used for realizing the rapid separation of the oil sludge according to the specific reaction sequence and the reaction conditions, the deoiling rate is up to more than 80%, the crude oil resources are saved, and the pollution of the oil sludge to the environment is reduced. In addition, the separated crude oil can be recovered for reuse.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. A method for treating oil sludge at the bottom of a crude oil storage tank is characterized by comprising the following steps:
s1, putting the oil sludge cleaned out of the crude oil storage tank into a tempering tank, adding water and carrying out size mixing treatment to enable the water content of the oil sludge to reach 20-25%, controlling the water adding amount by using a metering pump while adding water to the oil sludge, adjusting the rotating speed of the tempering tank to 60-100r/min, carrying out stirring reaction at the reaction temperature of 50-70 ℃ for 20-30min, and obtaining oil sludge;
s2, pumping the oil sludge slurry obtained in the step S1 into an oil sludge separation tank through a sludge pump, and filtering and separating the oil sludge slurry through a filter screen, wherein the stirring speed is 60-100r/min, the temperature is 70-80 ℃, and the separation time is set to be 20-30min according to different oil sludge properties;
and S3, transferring the crude oil which is filtered and separated out in the S2 mode to a crude oil tank, transferring the residual oil sludge with low oil content to a dangerous waste collection place, and carrying out incineration treatment in a centralized mode.
2. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: the aperture of the filter screen is set to be 35-45 meshes, particularly 40 meshes.
3. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: stirring is needed during filtering in S3, and the stirring aims to increase the fluidity of oil sludge at the tank bottom as much as possible by means of external force, so that filtering and separation are facilitated.
4. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: tank bottoms fatlute has realized the minimizing of fatlute effectively after filtering separation, can directly utilize the oil pump to pump away the oil reservoir from fatlute knockout drum lower part and get into crude oil tank or oil refining equipment, and this oil pump is installed on the oil pipe, and the very low fatlute of oil content of filter screen bottommost is accomplishing the back of filtering, opens the discharge opening, utilizes the blowdown hoe to collude the fatlute and concentrate.
5. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: the measuring pump is installed to the water inlet of quenching and tempering jar, the charge door has been seted up to upper end one side of quenching and tempering jar, pipeline and fatlute knockout drum's upper end one side intercommunication is passed through to the bottom of quenching and tempering jar, and installs the sludge pump on the fatlute knockout drum.
6. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: the internally mounted of fatlute knockout drum has the filter screen, the discharge opening has been seted up to one side of fatlute knockout drum, the discharge opening is located one side upper portion of filter screen, the bottom intercommunication of fatlute knockout drum has an oil pipe, install the valve on the oil pipe.
7. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: and heating jackets are respectively arranged on the outer surfaces of the tempering tank and the oil sludge separation tank.
8. The method of claim 1 for treating sludge at the bottom of a crude oil storage tank, wherein the method comprises the following steps: the inside of quenching and tempering jar and fatlute knockout drum installs the (mixing) shaft respectively, fixedly connected with stirring leaf on the (mixing) shaft, the agitator motor who is connected with the (mixing) shaft transmission is installed respectively at the top of quenching and tempering jar and fatlute knockout drum.
9. The method of claim 6, wherein the method comprises the following steps: the diameter of the discharge opening is set to be not less than 20cm, and a sealing plug cover is arranged on the discharge opening.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572032A (en) * | 2022-09-15 | 2023-01-06 | 深圳清华大学研究院 | Supercritical hydration CO for heavy oil thermal recovery 2 Method for producing hot fluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039301A (en) * | 2010-09-30 | 2011-05-04 | 昆明理工大学 | Oily sludge recycling and innocent comprehensive treatment process |
| CN108706843A (en) * | 2018-05-25 | 2018-10-26 | 中科海创环境科技（大连）有限公司 | A kind of processing method of tank bottom oil sludge |
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- 2019-11-28 CN CN201911190126.9A patent/CN111234854A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039301A (en) * | 2010-09-30 | 2011-05-04 | 昆明理工大学 | Oily sludge recycling and innocent comprehensive treatment process |
| CN108706843A (en) * | 2018-05-25 | 2018-10-26 | 中科海创环境科技（大连）有限公司 | A kind of processing method of tank bottom oil sludge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572032A (en) * | 2022-09-15 | 2023-01-06 | 深圳清华大学研究院 | Supercritical hydration CO for heavy oil thermal recovery 2 Method for producing hot fluid |
| CN115572032B (en) * | 2022-09-15 | 2024-05-28 | 深圳清华大学研究院 | Supercritical water-based CO for thermal recovery of thickened oil2Method for producing a thermal fluid |
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Application publication date: 20200605 |