CN115029155A - Treatment system and method for petroleum hydrocarbon polluted solid waste - Google Patents
Treatment system and method for petroleum hydrocarbon polluted solid waste Download PDFInfo
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- CN115029155A CN115029155A CN202210705369.7A CN202210705369A CN115029155A CN 115029155 A CN115029155 A CN 115029155A CN 202210705369 A CN202210705369 A CN 202210705369A CN 115029155 A CN115029155 A CN 115029155A
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- 239000002910 solid waste Substances 0.000 title claims abstract description 57
- 239000003209 petroleum derivative Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000197 pyrolysis Methods 0.000 claims abstract description 66
- 238000003860 storage Methods 0.000 claims abstract description 46
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 29
- 239000007790 solid phase Substances 0.000 claims abstract description 23
- 241000209094 Oryza Species 0.000 claims abstract description 22
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 22
- 235000009566 rice Nutrition 0.000 claims abstract description 22
- 239000010779 crude oil Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000000839 emulsion Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000002737 fuel gas Substances 0.000 claims abstract description 5
- 238000004062 sedimentation Methods 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 55
- 235000019198 oils Nutrition 0.000 claims description 55
- 239000007789 gas Substances 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 21
- 239000012071 phase Substances 0.000 claims description 16
- 239000002569 water oil cream Substances 0.000 claims description 12
- 239000003208 petroleum Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 6
- 235000019476 oil-water mixture Nutrition 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000007233 catalytic pyrolysis Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000004913 activation Effects 0.000 abstract description 3
- 239000010802 sludge Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
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- 239000002689 soil Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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- 125000000837 carbohydrate group Chemical group 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
- C10G55/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process
- C10G55/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only
- C10G55/06—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only including at least one catalytic cracking step
-
- 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
Abstract
The invention relates to a treatment system and a method for petroleum hydrocarbon polluted solid waste, wherein the treatment system comprises a crude oil produced liquid storage tank, a mixing tank, an ultrasonic cleaning device, a centrifugal machine and a microwave emulsion breaking device which are sequentially connected through pipelines, wherein a rod-shaped ultrasonic transducer and a second stirrer are arranged in the ultrasonic cleaning device, an oil-water sedimentation tank is arranged below the microwave emulsion breaking device, the lower end of the centrifugal machine is also connected with a solid-phase material mixing machine, and rice hull powder is added in the solid-phase material mixing machine; the solid-phase material mixing machine is connected with the pyrolysis device through a conveying belt, and the pyrolysis device is sequentially connected with the cyclone separator, the first section condenser, the second section condenser, the third section condenser and the fuel gas storage tank through pipelines. The invention is suitable for industrialized ultrasonic field cleaning, and then utilizes the rice hull powder and the petroleum hydrocarbon polluted solid waste to carry out co-catalytic pyrolysis, the rice hull powder can reduce the activation energy of the pyrolysis of the petroleum hydrocarbon polluted solid waste, and the energy consumption is saved.
Description
Technical Field
The invention relates to the technical field of treatment of solid waste polluted by petroleum hydrocarbon, in particular to a system and a method for treating the solid waste polluted by the petroleum hydrocarbon by sequentially utilizing ultrasonic field cleaning and co-pyrolysis of rice hull powder and the solid waste polluted by the petroleum hydrocarbon.
Background
The petroleum hydrocarbon polluted solid waste generated in the processes of petroleum exploitation, refining, storage and transportation is a main pollutant of petroleum industry, is complex in composition, contains aged crude oil, oil extraction reagents, heavy metals, sulfides, benzene series, bacteria and the like, and causes great pollution to the environment when being directly discharged, so that the petroleum hydrocarbon polluted solid waste needs to be subjected to harmless treatment. The existing treatment method of petroleum hydrocarbon polluted solid waste comprises the following steps: extraction, centrifugation, pyrolysis, incineration, and the like. Pyrolysis method has the advantages of convenient operation and high oil recovery rate, but the energy consumption required for pyrolyzing the petroleum hydrocarbon polluted solid waste with high oil content is very high, and the quality of crude oil products is changed by the cracking reaction.
Therefore, there is a need in the art to provide a petroleum hydrocarbon contaminated solid waste treatment system and process with low energy consumption and without changing the quality of crude oil suitable for industrial applications.
Disclosure of Invention
In view of the above, the present invention provides a system and a method for treating solid waste contaminated by petroleum hydrocarbon, which are suitable for industrial ultrasonic field cleaning (a large amount of crude oil in the solid waste contaminated by petroleum hydrocarbon can be recovered without affecting the quality of the crude oil), and then co-catalytic pyrolysis of rice hull powder and the solid waste contaminated by petroleum hydrocarbon is performed (the rice hull powder can reduce the activation energy of pyrolysis of the solid waste contaminated by petroleum hydrocarbon, so as to save energy consumption, and meanwhile, the rice hull powder is carbohydrate, so that the pyrolysis product is environment-friendly).
In order to achieve the purpose, the invention provides a treatment system of petroleum hydrocarbon polluted solid waste, which comprises a crude oil produced liquid storage tank, a mixing tank, an ultrasonic cleaning device, a centrifuge and a microwave demulsification device which are sequentially connected through pipelines, wherein a rodlike ultrasonic transducer and a second stirrer are arranged in the ultrasonic cleaning device, an oil-water sedimentation tank is arranged below the microwave demulsification device, the lower end of the centrifuge is also connected with a solid-phase material mixer, and rice hull powder is added into the solid-phase material mixer; the solid-phase material mixing machine is connected with a pyrolysis device through a conveying belt, and the pyrolysis device is sequentially connected with a cyclone separator, a first section condenser, a second section condenser, a third section condenser and a fuel gas storage tank through pipelines.
Preferably, a first pump is arranged on a pipeline between the crude oil produced liquid storage tank and the mixing tank.
Preferably, a first stirrer is arranged in the mixing tank, and a second pump is arranged on a pipeline between the mixing tank and the ultrasonic cleaning device.
Preferably, a third pump is arranged on a pipeline between the ultrasonic cleaning device and the centrifuge, and a fourth pump is arranged on a pipeline between the centrifuge and the microwave demulsification device.
Preferably, a fifth pump is arranged on a pipeline between the third-stage condenser and the fuel gas storage tank.
Preferably, a first blower is arranged on a pipeline between the pyrolysis device and the cyclone separator, a second blower is arranged on a pipeline between the first section of condenser and the second section of condenser, and a third blower is arranged on a pipeline between the second section of condenser and the third section of condenser.
Preferably, the pyrolysis device is further connected with a pyrolysis residue storage tank through a pipeline.
Preferably, the second section of condenser is further connected with an emulsion storage tank through a pipeline, and the third section of condenser is further connected with an oil storage tank through a pipeline.
In order to achieve the above object, the present invention also provides a method for treating petroleum hydrocarbon-contaminated solid waste, comprising the steps of:
s1 petroleum hydrocarbon contaminated solid waste and oil field produced fluids are mixed in a ratio of 1: 3-1: 5, feeding the mixture into a mixing tank, stirring for 5-10 minutes by 400-800 revolutions, and conveying the mixture into ultrasonic cleaning equipment by a second pump;
the method comprises the following steps that S2, after the mixture is subjected to ultrasonic cleaning in an ultrasonic cleaning device for 2-4 minutes, the mixture is conveyed to a centrifugal machine through a third pump, a separated solid phase is conveyed to a solid phase material mixing machine through a conveyor belt, and a liquid phase is conveyed to a microwave demulsification device through a fourth pump;
s3 cleaning the petroleum hydrocarbon polluted solid waste and rice hull powder after centrifugation according to the ratio of 1: 1-3: 1, mixing for 5-8 minutes in a solid-phase material mixer; after being uniformly mixed, the mixture is conveyed to a pyrolysis device through a conveyor belt;
s4 demulsifying the oil-water emulsion for 2-4 minutes under the microwave condition of 1000-2000W, and conveying the oil-water emulsion to an oil-water settling chamber under the action of gravity;
the petroleum hydrocarbon polluted solid waste and rice hull powder mixture cleaned by the S5 is subjected to catalytic pyrolysis for 5-10 minutes in a pyrolysis device at the temperature of 550-600 ℃; the pyrolysis gas is sequentially led to a three-section condenser; directly carrying out landfill treatment on the pyrolysis residue solid;
s6, condensing the pyrolysis gas to 110-120 ℃ through a first-stage condenser, separating oil accounting for more than 80 wt% of the pyrolysis gas, and introducing the oil to an oil storage tank; condensing the residual pyrolysis gas to 85-95 ℃ through a second-stage condenser, introducing the oil-water mixture into an emulsion storage tank, and subsequently introducing the oil-water mixture into a microwave demulsification device to recover an oil phase; and finally, condensing the pyrolysis gas to normal temperature through a third-section condenser, introducing the non-condensable gas to a gas storage tank, and introducing the oil to an oil storage tank.
Preferably, in step S2, the ultrasonic frequency is 20KHz, and the sound intensity is 0.3-0.45W/m 2 。
Compared with the prior art, the system and the method for treating the petroleum hydrocarbon polluted solid waste have the following beneficial effects:
the system and the method for treating the solid waste polluted by the petroleum hydrocarbon are suitable for industrialization, the ultrasonic field cleaning is carried out firstly, then the rice hull powder and the solid waste polluted by the petroleum hydrocarbon are used for co-catalytic pyrolysis, the rice hull powder can reduce the activation energy of the pyrolysis of the solid waste polluted by the petroleum hydrocarbon, and the energy consumption is saved.
Drawings
FIG. 1 is a schematic view showing the structural connection of a system for treating petroleum hydrocarbon-contaminated solid waste according to an embodiment of the present invention. In the figure, 1-crude oil produced liquid storage tank; 2-mixing tank; 3-ultrasonic cleaning device; 4-a rod-shaped ultrasonic transducer; 5-a first pump; 6-a second pump; 7-a third pump; 8-a centrifuge; 9-a fourth pump; 10-a microwave demulsification device; 11-an oil-water sedimentation tank; 12-solid phase material mixer; 13-a conveyor belt; 14-a pyrolysis unit; 15-a first blower; 16-a cyclone separator; 17-a first stage condenser; 18-a second stage condenser; 19-a third stage condenser; 20-a second blower; 21-a third blower; 22 a fifth pump; 23-an oil storage tank; 24-an emulsion storage tank; 25-a gas storage tank; 26-a first stirrer; 27-a second stirrer.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given with reference to the preferred embodiments of a system and a method for treating petroleum hydrocarbon-contaminated solid waste according to the present invention, and the detailed implementation, features and performance thereof. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The following materials or reagents, unless otherwise specified, are all commercially available.
The process of the present invention is further illustrated by, but is not limited to, the following examples.
As shown in fig. 1, an embodiment of the present invention provides a system for treating petroleum hydrocarbon-contaminated solid waste, including a crude oil produced liquid storage tank 1, a mixing tank 2, an ultrasonic cleaning device 3, a centrifuge 8, and a microwave demulsification device 10, which are sequentially connected by pipes, wherein the crude oil produced liquid storage tank 1 is used for storing and heating crude oil produced liquid; the centrifugal machine 8 is used for separating petroleum hydrocarbon polluted solid waste and oil-water emulsion after ultrasonic cleaning to realize solid-liquid separation; the microwave demulsification device 10 is used for demulsification of oil-water emulsion to realize oil-water separation. When the ultrasonic power is higher, the emulsion emulsification degree is higher, the microwave demulsification time can be properly prolonged, and the microwave radiation power can be improved; a first pump 5 is arranged on a pipeline between the crude oil produced liquid storage tank 1 and the mixing tank 2 and is used for conveying the crude oil produced liquid from the crude oil produced liquid storage tank 1 to the mixing tank 2; a first stirrer 26 is arranged in the mixing tank 2, the petroleum hydrocarbon polluted solid waste and the crude oil produced liquid can be uniformly mixed, and the rotating speed can be correspondingly increased or decreased according to the oil content of the petroleum hydrocarbon polluted solid waste; the mixing tank 2 is a mixing place of the petroleum hydrocarbon polluted solid waste and the produced liquid, and the petroleum hydrocarbon polluted solid waste and the produced liquid are stirred and mixed through the built-in first stirrer 26, so that the petroleum polluted soil is refined and uniform; a second pump 6 is arranged on a pipeline between the mixing tank 2 and the ultrasonic cleaning device 3 and is used for conveying the mixture of the petroleum polluted soil and the crude oil produced liquid from the mixing tank 2 to the ultrasonic cleaning device 3; a third pump 7 is arranged on a pipeline between the ultrasonic cleaning device 3 and the centrifuge 8 and is used for conveying the petroleum hydrocarbon polluted solid waste and the oil-water emulsion after ultrasonic cleaning from the ultrasonic cleaning device 3 to the centrifuge 8; a fourth pump 9 is arranged on a pipeline between the centrifugal machine 8 and the microwave demulsification device 10 and is used for conveying the oil-water emulsion separated by the centrifugal machine 8 to the microwave demulsification device 10; the ultrasonic cleaning device 3 is internally provided with a rod-shaped ultrasonic transducer 4 and a second stirrer 27, the ultrasonic cleaning device 3 is a cleaning place of the petroleum hydrocarbon polluted solid waste, most crude oil of the petroleum hydrocarbon polluted solid waste can be desorbed, the end socket is provided with a plurality of flanges and can be used for installing the rod-shaped ultrasonic transducer 4, and different numbers of transducers can be installed aiming at the petroleum hydrocarbon polluted solid waste with different oil contents. The rod-shaped ultrasonic transducer 4 can convert electric energy into ultrasonic energy, the power is adjustable, and the power can be properly improved aiming at petroleum hydrocarbon polluted solid waste with high oil content. Or a plurality of transducers are arranged to form a composite ultrasonic field to improve the oil removing effect. The built-in second stirrer 27 disperses the solid waste polluted by the petroleum hydrocarbon, can prevent the agglomeration of the solid waste polluted by the petroleum hydrocarbon, increases the contact area of the ultrasonic cavitation bubbles and the solid waste polluted by the petroleum hydrocarbon, and simultaneously ensures the penetration effect of the ultrasonic waves. An oil-water sedimentation tank 11 is arranged below the microwave demulsification device 10 and used for storing oil-water emulsion treated by the microwave demulsification device and realizing oil-water separation under the action of gravity; the lower end of the centrifuge 8 is also connected with a solid-phase material mixer 12 through a conveyor belt, and the solid-phase material mixer is a place for mixing the cleaned petroleum hydrocarbon polluted solid waste separated by the centrifuge 8 with rice hull powder. Mixing them uniformly to ensure that both are in co-catalytic pyrolysis; the solid-phase material mixer 12 is internally added with rice hull powder; the solid-phase material mixer 12 is connected with a pyrolysis device 14 through a conveyor belt 13, the conveyor belt 13 is used for conveying the mixture of the cleaned petroleum hydrocarbon polluted solid waste and the rice husk powder from the solid-phase material mixer 12 to the pyrolysis device 14, and the pyrolysis device 14 is a co-catalytic pyrolysis place of the mixture of the cleaned petroleum hydrocarbon polluted solid waste and the rice husk powder. The upper outlet is a pyrolysis gas-phase product outlet, and the lower outlet is a pyrolysis residue outlet; the pyrolysis device 14 is sequentially connected with a cyclone separator 16, a first-stage condenser 17, a second-stage condenser 18, a third-stage condenser 19 and a fuel gas storage tank 25 through pipelines, and the cyclone separator 16 is used for removing particle residues in pyrolysis gas-phase products so as to purify gas phases; the first-stage condenser 17 is used for primarily condensing pyrolysis gas-phase products to separate heavier oil, and the separated oil is conveyed to an oil storage tank 23 under the action of gravity; the second-stage condenser 18 is used for further cooling the pyrolysis gas-phase product and condensing moisture in the pyrolysis gas-phase product, and the condensed water and part of oil are conveyed to the emulsion storage tank 24 through the action of gravity; the third-stage condenser 19 cools the pyrolysis gas-phase product to room temperature, thereby separating non-condensable gas and remaining oil; the gas storage tank 25 is used for storing non-condensable gas in pyrolysis gas-phase products; a first air blower 15 is arranged on a pipeline between the pyrolysis device 14 and the cyclone separator 16 and is used for conveying pyrolysis gas-phase products from the pyrolysis device 14 to the cyclone separator 16; a second air blower 20 is arranged on a pipeline between the first-stage condenser 17 and the second-stage condenser 18 and used for conveying the preliminarily condensed pyrolysis gas-phase product from the first-stage condenser 17 to the second-stage condenser 18; a third blower 21 is arranged on a pipeline between the second-stage condenser 18 and the third-stage condenser 19 and used for conveying the pyrolysis gas-phase products after further condensation from the second-stage condenser 18 to the third-stage condenser 19; a fifth pump 22 is arranged on a pipeline between the third-stage condenser 19 and the gas storage tank 25, and is used for conveying residual oil condensed in the third-stage condenser 19 to an oil storage tank 23, and the oil storage tank 23 is used for storing oil products obtained by condensing pyrolysis gas-phase products; the second-stage condenser 18 is also connected with an emulsion storage tank 24 through a pipeline, and is used for storing an oil-water emulsion obtained by condensing the pyrolysis gas-phase product, and subsequently conveying the emulsion to the microwave demulsification device 10 to realize oil-water separation; the third-stage condenser 19 is also connected with an oil storage tank 23 through a pipeline.
Another embodiment of the present invention also provides a method for treating petroleum hydrocarbon contaminated solid waste, comprising the steps of:
s1 petroleum hydrocarbon polluted solid waste (oil-containing sludge with 22% of oil content and 54 wt% of solid content, and 1 ton of single treatment capacity) and oilfield produced fluid (polyetheramine solution with the concentration of 1g/L and the oil content of 2.5%) are mixed according to the weight ratio of 1: 4, is fed into the mixing tank 2, stirred for 10 minutes at 600 revolutions, and then the mixture is conveyed into the ultrasonic cleaning device 3 by the second pump 6(0.25t/min, 20 min).
The S2 mixture is subjected to ultrasonic treatment in an ultrasonic cleaning device 3 (ultrasonic frequency is 20KHz, sound intensity is 0.45W/m 2 ) After cleaning for 3 minutes, the mixture is conveyed to a centrifuge 8(3000r/min, 5min) through a third pump 7, the separated solid phase (petroleum hydrocarbon polluted solid waste after cleaning and centrifuging) is conveyed (60kg/min, 10min) to a solid phase material mixer 12 through a conveyor belt, and the liquid phase (oil-water emulsion) is conveyed to a microwave demulsification device 10 through a fourth pump 9(0.25t/min, 18 min).
S3 cleaning, centrifuging, and mixing the petroleum hydrocarbon polluted solid waste and the rice hull powder according to the ratio of 2: 1 for 5 minutes in the solid material mixer 12. After being mixed uniformly, the mixture is conveyed to a pyrolysis device 14 through a conveyor belt 13(180kg/min, 10 min).
The S4 oil-water emulsion is broken for 4 minutes under 2000W microwave conditions and then conveyed to the oil-water settling chamber 11 by gravity.
The petroleum hydrocarbon polluted solid waste and rice hull powder (30-100 meshes, union agriculture company, Jiangsu province, China) mixture cleaned by the S5 is subjected to catalytic pyrolysis for 8 minutes in a pyrolysis device 14 at 550 ℃. Pyrolysis gas (C8 and oil with higher carbon content 82%, C4-C7, 7%, C1-C3, H) 2 CO, 11%) was passed successively to a first condenser 17, a second condenser 18 and a third condenser 19. The solid pyrolysis residue with soil as main component may be directly buried.
The pyrolysis gas S6 is condensed to 120 ℃ by the first stage condenser 17, a large amount of oil (C8 and oil with higher carbon number, which accounts for 82 wt% of the pyrolysis gas) is separated, and the oil is led to the oil storage tank 23. Cooling the residual pyrolysis gas (C4-C7, 7 wt%) by a second-stage condenser 18Condensing to 95 ℃, leading the oil-water mixture to an emulsion storage tank 24, and then leading the oil-water mixture to a microwave demulsification device 10 to recover oil phase (oil in oil-containing sludge except for non-condensed water after pyrolysis). The pyrolysis gas is finally condensed to normal temperature by a third-stage condenser 19, and the non-condensable gas (C1-C3, CO and H) 2 11 wt%) to gas storage tank 25 and oil to oil storage tank 23.
In the technical scheme, after ultrasonic cleaning, the oil content of the oily sludge can be reduced to 4.7%, after co-pyrolysis with rice hull powder, the oil content of the sludge can be reduced to 0.24%, the oil removal rate is up to 99.5%, and the removed oil can be recycled. In the aspect of energy saving, after ultrasonic treatment, the oil content of the oil sludge is reduced by about 75%, the energy consumption of pyrolysis crude oil can be reduced by about 75%, and the higher the oil content of the oil-containing sludge is, the more remarkable the energy-saving effect is.
The above embodiments are only for the technical solution of the present invention, and not for limitation thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The system for treating the petroleum hydrocarbon-polluted solid waste is characterized by comprising a crude oil produced liquid storage tank, a mixing tank, an ultrasonic cleaning device, a centrifugal machine and a microwave emulsion breaking device which are sequentially connected through a pipeline, wherein a rod-shaped ultrasonic transducer and a second stirrer are arranged in the ultrasonic cleaning device, an oil-water sedimentation tank is arranged below the microwave emulsion breaking device, the lower end of the centrifugal machine is also connected with a solid-phase material mixing machine, and rice hull powder is added into the solid-phase material mixing machine; the solid-phase material mixing machine is connected with a pyrolysis device through a conveying belt, and the pyrolysis device is sequentially connected with a cyclone separator, a first section condenser, a second section condenser, a third section condenser and a fuel gas storage tank through pipelines.
2. The system for treating petroleum hydrocarbon contaminated solid waste according to claim 1, wherein a first pump is disposed on the pipeline between said crude oil production liquid storage tank and said mixing tank.
3. The system of claim 1, wherein a first agitator is disposed within the mixing tank and a second pump is disposed in the conduit between the mixing tank and the ultrasonic cleaning device.
4. The system for treating petroleum hydrocarbon contaminated solid waste according to claim 1, wherein a third pump is disposed in the conduit between said ultrasonic cleaning means and said centrifuge, and a fourth pump is disposed in the conduit between said centrifuge and said microwave demulsifying means.
5. The system of claim 1, wherein a fifth pump is disposed in the conduit between the third stage condenser and the gas storage tank.
6. The system of claim 1, wherein a first blower is disposed in the conduit between the pyrolysis unit and the cyclone, a second blower is disposed in the conduit between the first stage condenser and the second stage condenser, and a third blower is disposed in the conduit between the second stage condenser and the third stage condenser.
7. The system of claim 1, wherein the pyrolysis unit is further coupled to a pyrolysis residue storage tank via a pipeline.
8. The system of claim 1, wherein the second stage condenser is further piped to an emulsion storage tank and the third stage condenser is further piped to an oil storage tank.
9. A method for treating petroleum hydrocarbon polluted solid waste is characterized by comprising the following steps:
s1 petroleum hydrocarbon contaminated solid waste and oil field produced fluids are mixed in a ratio of 1: 3-1: feeding the mixture into a mixing tank according to the mass ratio of 5, stirring for 5-10 minutes at 400-800 revolutions, and conveying the mixture into ultrasonic cleaning equipment through a second pump;
the method comprises the following steps that S2, after the mixture is subjected to ultrasonic cleaning in an ultrasonic cleaning device for 2-4 minutes, the mixture is conveyed to a centrifugal machine through a third pump, a separated solid phase is conveyed to a solid phase material mixing machine through a conveyor belt, and a liquid phase is conveyed to a microwave demulsification device through a fourth pump;
s3 cleaning the centrifuged petroleum hydrocarbon polluted solid waste and rice hull powder according to the ratio of 1: 1-3: 1, mixing for 5-8 minutes in a solid-phase material mixer; after being uniformly mixed, the mixture is conveyed to a pyrolysis device through a conveyor belt;
s4 demulsifying the oil-water emulsion for 2-4 minutes under the microwave condition of 1000-2000W, and conveying the oil-water emulsion to an oil-water settling chamber under the action of gravity;
s5, co-catalytically pyrolyzing the mixture of the petroleum hydrocarbon polluted solid waste and the rice hull powder in a pyrolysis device at 550-600 ℃ for 5-10 minutes; the pyrolysis gas is sequentially led to a three-section condenser; directly carrying out landfill treatment on the pyrolysis residue solid;
s6, condensing the pyrolysis gas to 110-120 ℃ through a first-stage condenser, separating oil accounting for more than 80 wt% of the pyrolysis gas, and introducing the oil to an oil storage tank; condensing the residual pyrolysis gas to 85-95 ℃ through a second-stage condenser, introducing the oil-water mixture to an emulsion storage tank, and subsequently introducing the oil-water mixture to a microwave demulsification device to recover an oil phase; and finally, condensing the pyrolysis gas to normal temperature through a third-section condenser, introducing the non-condensable gas to a gas storage tank, and introducing the oil to an oil storage tank.
10. The method for treating petroleum hydrocarbon-contaminated solid waste, as recited in claim 9, wherein in step S2, said ultrasonic frequency is 20KHz, and sound intensity is 0.3-0.45W/m 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210705369.7A CN115029155A (en) | 2022-06-21 | 2022-06-21 | Treatment system and method for petroleum hydrocarbon polluted solid waste |
Applications Claiming Priority (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004087619A2 (en) * | 2003-03-28 | 2004-10-14 | Ab-Cwt, Llc | Process and apparatus for conversion of organic, waste, or low-value materials into useful products |
| US20210163326A1 (en) * | 2018-08-04 | 2021-06-03 | Panjin Newtide Energy Technology Co., Ltd. | Intelligent oil sludge treatment apparatuses and treatment processes |
| US20210387885A1 (en) * | 2020-06-11 | 2021-12-16 | China University Of Petroleum Blue Sky (Qingdao), Petroleum Technology Co., Ltd. | Solid waste treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004087619A2 (en) * | 2003-03-28 | 2004-10-14 | Ab-Cwt, Llc | Process and apparatus for conversion of organic, waste, or low-value materials into useful products |
| US20210163326A1 (en) * | 2018-08-04 | 2021-06-03 | Panjin Newtide Energy Technology Co., Ltd. | Intelligent oil sludge treatment apparatuses and treatment processes |
| US20210387885A1 (en) * | 2020-06-11 | 2021-12-16 | China University Of Petroleum Blue Sky (Qingdao), Petroleum Technology Co., Ltd. | Solid waste treatment method |
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