CN111777307A - Oily sludge treatment system and method - Google Patents
Oily sludge treatment system and method Download PDFInfo
- Publication number
- CN111777307A CN111777307A CN202010690655.1A CN202010690655A CN111777307A CN 111777307 A CN111777307 A CN 111777307A CN 202010690655 A CN202010690655 A CN 202010690655A CN 111777307 A CN111777307 A CN 111777307A
- Authority
- CN
- China
- Prior art keywords
- sludge
- inlet
- outlet
- phase
- conditioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- 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
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an oily sludge treatment system and method. The oily sludge treatment system comprises: the device comprises a first heating mixing tank, a vibrating screen, a second heating mixing tank, a three-phase horizontal spiral separator, a buffer tank and a disc separator. The first heating mixing tank is provided with an oil-containing sludge inlet, a first steam inlet, a demulsifier inlet, a gel breaker inlet and a first conditioned sludge outlet; the vibrating screen is provided with a first conditioned sludge inlet, a solid slag outlet and a screened sludge outlet; the second heating and mixing tank is provided with a screened sludge inlet, a second steam inlet, a flocculant inlet and a second conditioned sludge outlet; the three-phase horizontal spiral separator is provided with a second conditioned sludge inlet, a first solid phase outlet, a first water phase outlet and a first oil phase outlet; the disc separator has a second water phase inlet, a second solid phase outlet, a second water phase outlet and a second oil phase outlet. The system can reduce, recycle and harmlessly treat the oily sludge, and solves the problem of environmental pollution caused by the oily sludge.
Description
Technical Field
The invention relates to the technical field of hazardous waste treatment, in particular to an oily sludge treatment system and method.
Background
The oily sludge is brown black sticky solid waste with complex components and stable chemical properties, and is sourced from crude oil extraction, oil field gathering and transportation and oil refinery sewage treatment processes. The natural world does not inherently have oily sludge, and the crude oil and the finished oil leak out due to various accident operations and equipment problems caused by various fish finished oil, crude oil related industries, civil and residential groups, individuals and the like in oil field exploitation, petroleum smelting, use, storage, transportation and the like and are mixed with water, soil and the like to form a mixture containing oil, water, soil and even other pollutants.
In general, the oil content of the oily sludge is 10-50%, and the water content is 40-90%. At present, the annual production amount of oily sludge in China reaches more than 300 million tons, the annual production of oily sludge in three oil fields of Daqing, Shengli and Liaohe is about 200 million tons, the annual production of oil fields in Xinjiang is 4-5 million tons, and the stockpiling amount is about 22 million tons. In recent years, researchers have conducted a great deal of research on the treatment technology of oily sludge, but the degree of resource utilization is low from the viewpoint of end treatment in many cases.
Substances such as oil-containing petroleum and heavy metals in the oily sludge can have certain influence on the environment if the oily sludge is not treated and discharged, and hydrocarbon substances such as petroleum volatilize and influence the quality of the atmospheric environment if the oily sludge is stored in the open air; surface water quality may be affected by surface runoff if adjacent to the surface.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, it is an object of the present invention to propose an oil-containing sludge treatment system and method. The oily sludge treatment system can reduce, recycle and harmlessly treat oily sludge, solves the problem of environmental pollution caused by the oily sludge, improves the technical level of oily sludge treatment, and has remarkable environmental and economic benefits.
In one aspect of the invention, an oil-containing sludge treatment system is provided. According to an embodiment of the present invention, the oily sludge treatment system includes: a first heating and mixing tank having an oily sludge inlet, a first steam inlet, a demulsifier inlet, a breaker inlet, and a first conditioned sludge outlet; the vibrating screen is provided with a first conditioned sludge inlet, a solid slag outlet and a screened sludge outlet, and the first conditioned sludge inlet is connected with the first conditioned sludge outlet; the second heating and mixing tank is provided with a screened sludge inlet, a second steam inlet, a flocculant inlet and a second conditioned sludge outlet, and the screened sludge inlet is connected with the screened sludge outlet; the three-phase horizontal spiral separator is provided with a second conditioned sludge inlet, a first solid phase outlet, a first water phase outlet and a first oil phase outlet, and the second conditioned sludge inlet is connected with the second conditioned sludge outlet; the buffer tank is provided with a water phase material inlet and a water phase material outlet, and the water phase material inlet is connected with the first water phase outlet; the disc separator is provided with a second water phase inlet, a second solid phase outlet, a second water phase outlet and a second oil phase outlet, and the second water phase inlet is connected with the water phase material outlet.
According to the oily sludge treatment system disclosed by the embodiment of the invention, the oily sludge is conveyed into the first heating mixing tank, steam is introduced to heat the oily sludge to a specified temperature, and a gel breaker and a demulsifier are added to condition the oily sludge so as to reduce the viscosity; screening large-particle solid impurities from the conditioned oily sludge through a vibrating screen, feeding the screened oily sludge into a second heating and mixing tank, introducing steam, heating to a specified temperature, and adding a flocculating agent to condition the sludge; and (3) the conditioned oily sludge enters a three-phase horizontal spiral separator for three-phase separation to obtain a first solid phase, a water phase and an oil phase respectively. Wherein, first oil phase can be retrieved and stored, and first solid phase can carry out biodegradable, pyrolysis or incineration processing, and first aqueous phase gets into the buffer tank, then further three-phase separation through the pump sending dish separator obtains second aqueous phase, oil phase, solid phase respectively. The second oil phase can be recycled and stored, the second solid phase can be subjected to biodegradation, pyrolysis or incineration disposal, and the second water phase is treated and then discharged after reaching the standard. Therefore, according to the oily sludge treatment system in the embodiment of the invention, the oily sludge is subjected to tempering and modification, a three-phase horizontal spiral separator and a disc separator are used for carrying out three-phase separation twice, the oily sludge is separated into an oil phase, a water phase and a solid phase, the content of impurities (water and solid phases) in the oil phase is less than 3%, and the oily sludge can be recycled to achieve the purpose of recycling; the oil content in the solid phase is less than 3 percent, thereby reducing the resource waste and achieving the purpose of reduction. The oily sludge treatment system is simple in structure, convenient to use, capable of being widely applied to oily sludge treatment engineering, high in recycling, reducing and harmless degrees, and remarkable in environmental benefit and economic benefit.
In addition, the oily sludge treatment system according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the treatment capacity of the oily sludge treatment system is 1-15 m3/h。
In some embodiments of the present invention, a transfer pump is disposed between the first conditioned sludge outlet and the first conditioned sludge inlet, between the second conditioned sludge outlet and the second conditioned sludge inlet, and between the aqueous phase material outlet and the second aqueous phase inlet.
In some embodiments of the invention, the first heated mixing tank further has a water inlet connected to the second aqueous phase outlet.
In some embodiments of the invention, the oily sludge treatment system further comprises: the demulsifier comprises a demulsifier storage tank, a gel breaker storage tank and a flocculant storage tank, wherein the demulsifier storage tank is connected with the demulsifier inlet, the gel breaker storage tank is connected with the gel breaker inlet, and the flocculant storage tank is connected with the flocculant inlet.
In some embodiments of the present disclosure, dosing pumps are disposed between the emulsion breaker storage tank and the emulsion breaker inlet, between the gel breaker storage tank and the gel breaker inlet, and between the flocculant storage tank and the flocculant inlet.
In some embodiments of the invention, the oily sludge treatment system further comprises: an oil tank connected to the first oil phase outlet and the second oil phase outlet.
In another aspect of the invention, the invention provides a method for treating oily sludge. According to the embodiment of the invention, the oily sludge treatment method is implemented by adopting the oily sludge treatment system of the embodiment. The oily sludge treatment method comprises the following steps: the method comprises the following steps of (1) supplying oil-containing sludge, steam, a demulsifier and a gel breaker into a first heating mixing tank for first heating conditioning to obtain first conditioned sludge; feeding the first conditioned sludge into a vibrating screen for screening treatment to obtain solid slag and screened sludge; feeding the screened sludge, steam and a flocculating agent into a second heating and mixing tank for second heating and conditioning to obtain second conditioned sludge; feeding the second conditioned sludge into a three-phase horizontal spiral separator to perform first three-phase separation treatment to obtain a first solid phase, a first water phase and a first oil phase; and feeding the first water phase into a disc separator through a buffer tank for second three-phase separation treatment to obtain a second solid phase, a second water phase and a second oil phase.
According to the oily sludge treatment method provided by the embodiment of the invention, the oily sludge is conveyed into the first heating mixing tank, steam is introduced to heat the oily sludge to a specified temperature, and a gel breaker and a demulsifier are added to condition the oily sludge so as to reduce the viscosity; screening large-particle solid impurities from the conditioned oily sludge through a vibrating screen, feeding the screened oily sludge into a second heating and mixing tank, introducing steam, heating to a specified temperature, and adding a flocculating agent to condition the sludge; and (3) the conditioned oily sludge enters a three-phase horizontal spiral separator for three-phase separation to obtain a first solid phase, a water phase and an oil phase respectively. Wherein, first oil phase can be retrieved and stored, and first solid phase can carry out biodegradable, pyrolysis or incineration processing, and first aqueous phase gets into the buffer tank, then further three-phase separation through the pump sending dish separator obtains second aqueous phase, oil phase, solid phase respectively. The second oil phase can be recycled and stored, the second solid phase can be subjected to biodegradation, pyrolysis or incineration disposal, and the second water phase is treated and then discharged after reaching the standard. Therefore, according to the method for treating the oily sludge of the embodiment of the invention, the oily sludge is subjected to tempering and modification, a three-phase horizontal spiral separator and a disc separator are used for carrying out three-phase separation twice, the oily sludge is separated into an oil phase, a water phase and a solid phase, the content of impurities (water and solid phases) in the oil phase is less than 3%, and the oily sludge can be recycled to achieve the purpose of recycling; the oil content in the solid phase is less than 3 percent, thereby reducing the resource waste and achieving the purpose of reduction. The oily sludge treatment method has simple process, can be widely applied to oily sludge treatment engineering, has high recycling, reduction and harmless degrees, and has remarkable environmental benefit and economic benefit.
In addition, the method for treating the oily sludge according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the average particle size of the oily sludge is no greater than 20 mm.
In some embodiments of the invention, the oil-containing sludge has a solids content of less than 20%.
In some embodiments of the present invention, the first heat conditioning and the second heat conditioning are each independently performed at 60 to 80 ℃.
In some embodiments of the invention, the average particle size of the second conditioned sludge is no greater than 2 mm.
In some embodiments of the invention, the maximum solid particle diameter in the first aqueous phase is no greater than 400 μm.
In some embodiments of the invention, the first aqueous phase has a solids content of less than 3%.
In some embodiments of the invention, the method for treating oily sludge further comprises: feeding the second aqueous phase to the first heated mix tank for the first heated conditioning.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic configuration diagram of an oily sludge treatment system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the invention, an oil-containing sludge treatment system is provided. Referring to fig. 1, according to an embodiment of the present invention, the oily sludge treatment system includes: the device comprises a first heating and mixing tank 100, a vibrating screen 200, a second heating and mixing tank 300, a three-phase horizontal screw separator 400, a buffer tank 500 and a disc separator 600. Wherein the first heating and mixing tank 100 has an oily sludge inlet 101, a first steam inlet 102, a demulsifier inlet 103, a breaker inlet 104, and a first conditioned sludge outlet 105; the vibrating screen 200 is provided with a first conditioned sludge inlet 201, a solid slag outlet 202 and a screened sludge outlet 203, and the first conditioned sludge inlet 201 is connected with the first conditioned sludge outlet 105; the second heating and mixing tank 300 is provided with a screened sludge inlet 301, a second steam inlet 302, a flocculant inlet 303 and a second conditioned sludge outlet 304, and the screened sludge inlet 301 is connected with the screened sludge outlet 203; the three-phase horizontal spiral separator 400 is provided with a second conditioned sludge inlet 401, a first solid phase outlet 402, a first water phase outlet 403 and a first oil phase outlet 404, wherein the second conditioned sludge inlet 401 is connected with the second conditioned sludge outlet 304; the buffer tank 500 is provided with an aqueous phase material inlet 501 and an aqueous phase material outlet 502, and the aqueous phase material inlet 501 is connected with the first aqueous phase outlet 403; the disc separator 600 has a second water phase inlet 601, a second solid phase outlet 602, a second water phase outlet 603 and a second oil phase outlet 604, and the second water phase inlet 601 is connected to the water phase material outlet 502.
The oily sludge treatment system according to an embodiment of the present invention is further described in detail below.
According to an embodiment of the invention, the first heated mixing tank 100 has an oily sludge inlet 101, a first steam inlet 102, a demulsifier inlet 103, a breaker inlet 104, and a first conditioned sludge outlet 105. The first heating and mixing tank 100 is adapted to perform a first heating conditioning of the oil-containing sludge, steam, demulsifier, and gel breaker to obtain a first conditioned sludge. Specifically, under the heating action of steam, the viscosity of the oil-containing sludge can be effectively reduced by the gel breaker and the demulsifier. In some embodiments, the first heated mixing tank 100 is a steel vessel that may be used for temporary storage, conditioning, homogenization, and heating of the oily sludge.
According to an embodiment of the present invention, a blender 110 may also be provided within the first heated mixing tank 100 to blend the contents thereof.
According to an embodiment of the present invention, the average particle size of the oily sludge is not more than 20mm, and may be, for example, 1mm, 3mm, 5mm, 10mm, 15mm, 20mm, or the like. This can further improve the conditioning effect of the oily sludge. If the average particle diameter of the oily sludge to be treated does not satisfy the above conditions, it may be subjected to drum screening or crushing pretreatment in advance.
According to an embodiment of the present invention, the solid content of the oil-containing sludge is less than 20%, and may be, for example, 1%, 5%, 10%, 15%, 20%, or the like. Specifically, the oil-containing sludge can be diluted to a solid content of less than 20% by adding water to the first heating and mixing tank 100 according to actual conditions, so as to facilitate the treatment of the subsequent process.
According to an embodiment of the present invention, the specific gravity of the solid-phase material in the first heating and mixing tank 100 is greater than that of the liquid-phase material. This can further improve the conditioning effect of the oily sludge.
According to an embodiment of the present invention, the first heat conditioning may be performed at 60 to 80 ℃, for example, 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃ or the like. This can further improve the conditioning effect of the oily sludge. Specifically, the first heat-conditioning may be controlled by high-temperature steam to be performed at the above-mentioned temperature.
According to an embodiment of the present invention, the vibrating screen 200 has a first conditioned sludge inlet 201, a solid slag outlet 202 and a screened sludge outlet 203, the first conditioned sludge inlet 201 being connected to the first conditioned sludge outlet 105. The vibrating screen 200 is adapted to screen the first conditioned sludge to obtain solid slag and screened sludge. In particular, the vibrating screen 200 may employ equipment commonly used in the art. In some embodiments, the vibrating screen 200 has a screen mesh with a diameter of 2mm, so that large solid residues in the oily sludge can be screened out to avoid adverse effects on subsequent working sections.
According to an embodiment of the invention, the second heated mixing tank 300 has a screened sludge inlet 301, a second steam inlet 302, a flocculant inlet 303 and a second conditioned sludge outlet 304, the screened sludge inlet 301 being connected to the screened sludge outlet 203. The second heating and mixing tank 300 is adapted to perform a second heating conditioning of the screened sludge, steam, and flocculant to obtain a second conditioned sludge. Specifically, under the heating action of steam, the flocculant can further modify and condition the oily sludge so as to facilitate the subsequent three-phase separation. In some embodiments, the second heated mixing tank 300 is a steel vessel that may be used for temporary storage, conditioning, homogenization, and heating of the oily sludge.
According to an embodiment of the present invention, a blender 310 may also be provided within the second heated mixing tank 300 to blend the contents thereof.
According to an embodiment of the present invention, the second heat conditioning may be performed at 60 to 80 ℃, for example, 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃ or the like. This can further improve the conditioning effect of the oily sludge. Specifically, the second heat-conditioning may be controlled by high-temperature steam to be performed at the above-mentioned temperature.
According to an embodiment of the invention, the above-mentioned second conditioned sludge has an average particle size of not more than 2mm, such as 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. This can further facilitate the subsequent three-phase separation process.
According to an embodiment of the present invention, the solid content of the oil-containing sludge is less than 20%, and may be, for example, 1%, 5%, 10%, 15%, 20%, or the like. Specifically, the oil-containing sludge can be diluted to a solid content of less than 20% by adding water to the second heating and mixing tank 300 according to actual conditions, so as to facilitate the treatment of the subsequent process.
According to an embodiment of the present invention, the three-phase horizontal decanter 400 has a second conditioned sludge inlet 401, a first solid phase outlet 402, a first aqueous phase outlet 403 and a first oil phase outlet 404, the second conditioned sludge inlet 401 being connected to the second conditioned sludge outlet 304. The three-phase horizontal decanter centrifuge 400 is adapted to subject the second conditioned sludge to a first three-phase separation process to obtain a first solid phase, a first aqueous phase and a first oil phase. Specifically, the three-phase horizontal screw separator is a common device in the field, and can separate the second conditioned sludge into a solid phase, a water phase and an oil phase through a centrifugal effect.
According to the embodiment of the invention, the temperature of the oily sludge entering the three-phase horizontal spiral separator 400 is 60-80 ℃, so that the three-phase separation effect is better.
According to an embodiment of the present invention, the buffer tank 500 has an aqueous phase material inlet 501 and an aqueous phase material outlet 502, and the aqueous phase material inlet 501 is connected to the first aqueous phase outlet 403. The buffer tank 500 is adapted to temporarily store and buffer the first aqueous phase output from the three-phase horizontal screw separator 400 and to help homogenize the materials therein.
According to an embodiment of the invention, the maximum solid particle diameter in the above first aqueous phase is not more than 400 μm, such as 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, etc. Therefore, the three-phase separation in the subsequent working section can be further facilitated.
According to an embodiment of the present invention, the solid content of the first aqueous phase is less than 3%, and may be, for example, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 2.9%, or the like.
According to an embodiment of the present invention, the disc separator 600 has a second water phase inlet 601, a second solid phase outlet 602, a second water phase outlet 603 and a second oil phase outlet 604, the second water phase inlet 601 being connected to the water phase material outlet 502. The disk separator 600 is adapted to perform a second three-phase separation process on the first aqueous phase to obtain a second solid phase, a second aqueous phase, and a second oil phase. Specifically, the disc separator is a common device in the art, and can further separate the second aqueous phase into a solid phase, an aqueous phase and an oil phase by centrifugation.
According to the embodiment of the invention, the temperature of the water phase material entering the disc separator 600 is 60-80 ℃, so that the three-phase separation effect is better.
According to the embodiment of the invention, a conveying pump 10 is arranged 601 between the first conditioned sludge outlet 105 and the first conditioned sludge inlet 201, between the second conditioned sludge outlet 304 and the second conditioned sludge inlet 401, and between the aqueous phase material outlet 502 and the second aqueous phase inlet. The transfer pump 10 may employ equipment commonly used in the art, such as a progressive cavity pump, slurry pump, and the like.
According to an embodiment of the present invention, the first heated mixing tank 100 also has a water inlet 106. The water inlet 106 is connected to a second aqueous phase outlet 603. Thereby, the water phase separated by the disc separator 600 may be supplied to the first heating and mixing tank 100 for diluting the oil-containing sludge.
According to an embodiment of the present invention, the oily sludge treatment system of the present invention further comprises: the demulsifier comprises a demulsifier storage tank 810, a gel breaker storage tank 820 and a flocculant storage tank 830, wherein the demulsifier storage tank 810 is connected with a demulsifier inlet 103, the gel breaker storage tank 820 is connected with a gel breaker inlet 104, and the flocculant storage tank 830 is connected with a flocculant inlet 300. In some embodiments, the breaker reservoir 810, breaker reservoir 820, and flocculant reservoir 830 may be made of PE or PVC, wherein each agent may be diluted as desired.
According to the embodiment of the invention, dosing pumps 20 are arranged between the demulsifier storage tank 810 and the demulsifier inlet 103, between the breaker storage tank 802 and the breaker inlet 104, and between the flocculant storage tank 830 and the flocculant inlet 303. In some embodiments, the dosing pump 20 may be a dosing pump or a chemical pump commonly used in the art.
According to an embodiment of the present invention, the oily sludge treatment system of the present invention further comprises: an oil tank 700. The oil tank 700 is connected to a first oil phase outlet 404 and a second oil phase outlet 604. Therefore, the oil tank 700 can be used for temporarily storing and recovering the oil phase obtained by separating the three-phase horizontal screw separator 400 and the disc separator 600. In some embodiments, the oil tank 700 is a steel container.
In summary, the oily sludge treatment system proposed by the present invention may have at least one of the following advantages:
(1) the equipment runs reliably, can run stably for a long period, and has low failure rate.
(2) The content of impurities (water solid phase) in the generated oil phase is less than 3 percent, the heat value is high, and the recycling degree is high.
(3) The oil content in the generated solid phase is less than 3 percent, the resource waste is reduced, and the purpose of reduction is achieved.
(4) The oil content in the generated water phase is less than 1000ppm, the oil content is low, the load of wastewater treatment can be reduced, and part of the water phase can be used as dilution water, so that the utilization rate is improved.
In another aspect of the invention, the invention provides a method for treating oily sludge. According to the embodiment of the invention, the oily sludge treatment method is implemented by adopting the oily sludge treatment system of the embodiment. The oily sludge treatment method comprises the following steps: the method comprises the following steps of (1) supplying oil-containing sludge, steam, a demulsifier and a gel breaker into a first heating mixing tank for first heating conditioning to obtain first conditioned sludge; feeding the first conditioned sludge into a vibrating screen for screening treatment to obtain solid slag and screened sludge; feeding the screened sludge, steam and a flocculating agent into a second heating and mixing tank for second heating and conditioning to obtain second conditioned sludge; feeding the second conditioned sludge into a three-phase horizontal spiral separator to perform first three-phase separation treatment to obtain a first solid phase, a first water phase and a first oil phase; and feeding the first water phase into a disc separator through a buffer tank for second three-phase separation treatment to obtain a second solid phase, a second water phase and a second oil phase.
According to an embodiment of the present invention, the average particle size of the oily sludge is not more than 20mm, and may be, for example, 1mm, 3mm, 5mm, 10mm, 15mm, 20mm, or the like. This can further improve the conditioning effect of the oily sludge. If the average particle diameter of the oily sludge to be treated does not satisfy the above conditions, it may be subjected to drum screening or crushing pretreatment in advance.
According to an embodiment of the present invention, the solid content of the oil-containing sludge is less than 20%, and may be, for example, 1%, 5%, 10%, 15%, 20%, or the like. Specifically, the oil-containing sludge can be diluted to a solid content of less than 20% by adding water to the first heating and mixing tank 100 according to actual conditions, so as to facilitate the treatment of the subsequent process.
According to an embodiment of the present invention, the first heat conditioning may be performed at 60 to 80 ℃, for example, 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃ or the like. This can further improve the conditioning effect of the oily sludge. Specifically, the first heat-conditioning may be controlled by high-temperature steam to be performed at the above-mentioned temperature.
According to an embodiment of the present invention, the second heat conditioning may be performed at 60 to 80 ℃, for example, 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃ or the like. This can further improve the conditioning effect of the oily sludge. Specifically, the second heat-conditioning may be controlled by high-temperature steam to be performed at the above-mentioned temperature.
According to an embodiment of the invention, the above-mentioned second conditioned sludge has an average particle size of not more than 2mm, such as 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. This can further facilitate the subsequent three-phase separation process.
According to an embodiment of the present invention, the solid content of the oil-containing sludge is less than 20%, and may be, for example, 1%, 5%, 10%, 15%, 20%, or the like. Specifically, the oil-containing sludge can be diluted to a solid content of less than 20% by adding water to the second heating and mixing tank 300 according to actual conditions, so as to facilitate the treatment of the subsequent process.
According to the embodiment of the invention, the temperature of the oily sludge entering the three-phase horizontal spiral separator is 60-80 ℃, so that the three-phase separation effect is better.
According to an embodiment of the invention, the maximum solid particle diameter in the above first aqueous phase is not more than 400 μm, such as 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, etc. Therefore, the three-phase separation in the subsequent working section can be further facilitated.
According to an embodiment of the present invention, the solid content of the first aqueous phase is less than 3%, and may be, for example, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 2.9%, or the like.
According to the embodiment of the invention, the temperature of the water phase material entering the disc separator is 60-80 ℃, so that the three-phase separation effect is better.
According to an embodiment of the present invention, the method for treating oily sludge of the present invention may further comprise: the second aqueous phase is fed to a first heated mixing tank for first heated conditioning. Thereby, the water phase separated by the disc separator can be supplied to the first heating and mixing tank for diluting the oil-containing sludge.
In addition, the oily sludge treatment method is implemented by using the oily sludge treatment system of the embodiment, and it can be understood that all the features and advantages described above for the oily sludge treatment system are also applicable to the oily sludge treatment method, and are not described again.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An oil-containing sludge treatment system, comprising:
a first heating and mixing tank having an oily sludge inlet, a first steam inlet, a demulsifier inlet, a breaker inlet, and a first conditioned sludge outlet;
the vibrating screen is provided with a first conditioned sludge inlet, a solid slag outlet and a screened sludge outlet, and the first conditioned sludge inlet is connected with the first conditioned sludge outlet;
the second heating and mixing tank is provided with a screened sludge inlet, a second steam inlet, a flocculant inlet and a second conditioned sludge outlet, and the screened sludge inlet is connected with the screened sludge outlet;
the three-phase horizontal spiral separator is provided with a second conditioned sludge inlet, a first solid phase outlet, a first water phase outlet and a first oil phase outlet, and the second conditioned sludge inlet is connected with the second conditioned sludge outlet;
the buffer tank is provided with a water phase material inlet and a water phase material outlet, and the water phase material inlet is connected with the first water phase outlet;
the disc separator is provided with a second water phase inlet, a second solid phase outlet, a second water phase outlet and a second oil phase outlet, and the second water phase inlet is connected with the water phase material outlet.
2. The oily sludge treatment system according to claim 1, wherein a transfer pump is arranged between the first conditioned sludge outlet and the first conditioned sludge inlet, between the second conditioned sludge outlet and the second conditioned sludge inlet, and between the aqueous phase material outlet and the second aqueous phase inlet.
3. The oily sludge treatment system of claim 1 wherein the first heated mixing tank further has a water inlet connected to the second aqueous phase outlet.
4. The oily sludge treatment system of claim 1 further comprising: the demulsifier comprises a demulsifier storage tank, a gel breaker storage tank and a flocculant storage tank, wherein the demulsifier storage tank is connected with the demulsifier inlet, the gel breaker storage tank is connected with the gel breaker inlet, and the flocculant storage tank is connected with the flocculant inlet;
optionally, dosing pumps are arranged between the demulsifier storage tank and the demulsifier inlet, between the gel breaker storage tank and the gel breaker inlet, and between the flocculant storage tank and the flocculant inlet.
5. The oily sludge treatment system of claim 1 further comprising: an oil tank connected to the first oil phase outlet and the second oil phase outlet.
6. An oily sludge treatment method, characterized in that the oily sludge treatment method is implemented by using the oily sludge treatment system according to any one of claims 1 to 5, and the oily sludge treatment method comprises:
the method comprises the following steps of (1) supplying oil-containing sludge, steam, a demulsifier and a gel breaker into a first heating mixing tank for first heating conditioning to obtain first conditioned sludge;
feeding the first conditioned sludge into a vibrating screen for screening treatment to obtain solid slag and screened sludge;
feeding the screened sludge, steam and a flocculating agent into a second heating and mixing tank for second heating and conditioning to obtain second conditioned sludge;
feeding the second conditioned sludge into a three-phase horizontal spiral separator to perform first three-phase separation treatment to obtain a first solid phase, a first water phase and a first oil phase;
and feeding the first water phase into a disc separator through a buffer tank for second three-phase separation treatment to obtain a second solid phase, a second water phase and a second oil phase.
7. The method according to claim 6, wherein the oily sludge has an average particle diameter of not more than 20 mm;
optionally, the solids content of the oily sludge is less than 20%.
8. The method according to claim 6, wherein the first heating and conditioning and the second heating and conditioning are independently performed at 60 to 80 ℃.
9. The method according to claim 6, wherein the average particle size of the second conditioned sludge is not more than 2 mm;
optionally, the maximum solid particle diameter in the first aqueous phase is no greater than 400 μm;
optionally, the first aqueous phase has a solids content of less than 3%.
10. The method for treating oily sludge according to claim 6, characterized by further comprising: feeding the second aqueous phase to the first heated mix tank for the first heated conditioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690655.1A CN111777307A (en) | 2020-07-17 | 2020-07-17 | Oily sludge treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690655.1A CN111777307A (en) | 2020-07-17 | 2020-07-17 | Oily sludge treatment system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111777307A true CN111777307A (en) | 2020-10-16 |
Family
ID=72764393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010690655.1A Pending CN111777307A (en) | 2020-07-17 | 2020-07-17 | Oily sludge treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111777307A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112876023A (en) * | 2021-01-22 | 2021-06-01 | 北京汇清源水务科技有限公司 | Pretreatment method for recovering oil sludge by using thermal desorption device |
-
2020
- 2020-07-17 CN CN202010690655.1A patent/CN111777307A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112876023A (en) * | 2021-01-22 | 2021-06-01 | 北京汇清源水务科技有限公司 | Pretreatment method for recovering oil sludge by using thermal desorption device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101602566B (en) | Novel process for comprehensively treating oily sludge of oil field | |
| US5645714A (en) | Oil sand extraction process | |
| CN100460355C (en) | Method for producing ceramic granule from oil sludge sand | |
| CN109652119B (en) | Dirty oil/aging oil treatment equipment | |
| CN103121780A (en) | Oil sludge treatment method | |
| CN113121076B (en) | Oil sludge sand treatment method | |
| WO2014091498A2 (en) | Process for treatment of crude oil, sludges and emulsions | |
| CN109970295A (en) | A kind of oil sludge processing equipment and technique | |
| CN212864516U (en) | Oily sludge treatment system | |
| CN111777307A (en) | Oily sludge treatment system and method | |
| RU2698667C1 (en) | Method for processing oil-containing sludge and technological complex for its implementation | |
| Zhou | Role of mineral flotation technology in improving bitumen extraction from mined A thabasca oil sands III. Next generation of water‐based oil sands extraction | |
| JPH08508759A (en) | Petroleum waste treatment | |
| CN104291542A (en) | Equipment and method for clearing away and recovering sludge at bottom of crude oil storage tank | |
| WO2011031976A2 (en) | Bitumen separation compositions and processes | |
| CN107793003A (en) | A kind of tank bottom oil sludge apparatus for continuous treatment and processing method | |
| CN113121074A (en) | Method and system for thermal fine washing-multiphase separation of thick oil sludge | |
| Xu et al. | Investigation on alternative disposal methods for froth treatment tailings—part 1, disposal without asphaltene recovery | |
| CN107082544A (en) | It is a kind of to handle the process that oil stores up cabin bilge oil sludge | |
| RU2739189C1 (en) | Oil sludge processing method | |
| RU2536906C1 (en) | Methods for processing oil-containing wastes and device for its implementation | |
| KR101698575B1 (en) | Apparatus and method for purify soil polluted crude | |
| CN112174459A (en) | Oily sludge pretreatment system and treatment method | |
| KR20130001208A (en) | Method and apparatus for de-oiling magnetic solid waste | |
| CN112723698A (en) | Harmless treatment system and treatment process for tank cleaning oil sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |