CN110550798A - offshore drilling platform hazardous waste treatment device and treatment process - Google Patents
offshore drilling platform hazardous waste treatment device and treatment process Download PDFInfo
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- CN110550798A CN110550798A CN201910694625.5A CN201910694625A CN110550798A CN 110550798 A CN110550798 A CN 110550798A CN 201910694625 A CN201910694625 A CN 201910694625A CN 110550798 A CN110550798 A CN 110550798A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C10G2300/1007—Used oils
Abstract
The invention relates to a device and a process for treating dangerous waste of an offshore drilling platform, belonging to the technical field of dangerous waste treatment, and comprising an oil-separation sedimentation tank, a floating oil collecting machine, a centrifuge, a waste oil regeneration treatment device, a sewage treatment device and a cement kiln cooperative treatment device, wherein the oil-separation sedimentation tank is connected with a raw material inlet, three outlets with different depths are arranged on the oil-separation sedimentation tank and respectively comprise a floating oil outlet, an oily sewage outlet and an oil sludge outlet, the floating oil outlet is connected with the waste oil regeneration treatment device through the floating oil collecting machine, the oily sewage outlet is connected with the sewage treatment device, the oil sludge outlet is connected with the centrifuge, the centrifugal waste water outlet of the centrifuge is connected with the waste oil regeneration treatment device, the centrifugal solid residue outlet of the centrifuge is connected with the cement kiln cooperative treatment device, so as to solve the problems of low treatment efficiency, low treatment efficiency and low treatment efficiency of dangerous waste gas existing on the offshore drilling platform in, The technical problem of high cost.
Description
Technical Field
the invention relates to a device and a process for treating dangerous waste of an offshore drilling platform, and belongs to the technical field of dangerous waste treatment.
Background
With the increasingly severe environmental protection situation, the national attention on ecological environment protection, especially marine environment protection, is increasing, each offshore oil field is continuously proposed to gradually realize 'zero emission' of industrial wastewater, domestic sewage and marine solid waste, and the amount of hazardous waste to be treated in the offshore oil field is rapidly increasing year by year. According to statistics, in 2018, the dangerous waste yield of a certain oil field in Bohai sea only reaches 7 million tons (3 million tons in 2017), the dangerous waste yield of offshore blocks such as Bohai south and the like is additionally increased, the dangerous waste yield of the eastern region of the Bohai sea oil field in 2018 is increased to 20 million tons from 10 million tons in 2017, and the demand of dangerous waste treatment capacity is still released at high speed until 2020. In the aspect of disposal, hazardous waste treatment of the offshore platform of the Bohai oilfield is completely entrusted to an environmental protection service company, the treatment scale is 12.02 million tons/year, the treatment capacity cannot meet the requirement of the Bohai oilfield, and partial hazardous waste of the offshore platform of the Bohai oilfield can only be temporarily stored on the platform at present. Therefore, in order to efficiently and cleanly solve the problem of dangerous waste treatment of the Bohai sea oil field, a treatment process for dealing with dangerous waste generated by an offshore drilling platform is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device and a process for treating dangerous waste of an offshore drilling platform, which are used for solving the technical problems of low treatment efficiency and high cost of dangerous waste of the offshore drilling platform in the prior art.
The technical scheme for solving the technical problems is as follows: the utility model provides a dangerous waste gas processing apparatus of offshore drilling platform, includes oil separation sedimentation tank, oil slick collector, centrifuge, waste oil regeneration processing apparatus, sewage treatment plant and cement kiln and deals with the device in coordination, oil separation sedimentation tank connects the raw materials import, oil separation sedimentation tank is equipped with the three export of the degree of depth difference, is oil slick export, oily sewage export and fatlute sediment export respectively, the oil slick export is connected with waste oil regeneration processing apparatus through oil slick collector, oily sewage export is connected with sewage treatment plant, fatlute sediment export is connected with centrifuge, and centrifuge's centrifugal waste water export is connected with waste oil regeneration processing apparatus, and waste oil centrifuge's the export of the solid sediment of centrifugation is connected with cement kiln deals with the device in coordination.
The invention has the beneficial effects that: the raw materials are pretreated by arranging the oil separation sedimentation tank, the waste oil on the surface layer of the oil separation sedimentation tank is collected by arranging the floating oil collector, the sludge and the sediment discharged from the oil separation sedimentation tank are centrifugally separated by the centrifugal machine, the waste oil in the centrifugal waste water generated by the centrifugal machine is further separated by the waste oil regeneration treatment device, the oily sewage separated from the oil separation sedimentation tank is subjected to oil-water separation by the sewage treatment device, the centrifugal solid sediment separated from the centrifugal machine is treated by the cement kiln cooperative treatment device, the hazardous waste generated by the offshore drilling platform is treated by the above devices, the oil recovery efficiency is high, the separated and recovered waste oil is completely used for producing base oil after being treated, the oil quality is high, the waste residue generated in the treatment process is treated by the cement kiln cooperative treatment device, and the harmlessness and the full utilization of heat energy are really realized, the method has the advantages of high treatment efficiency, good treatment effect, low pollution to marine environment and low cost.
on the basis of the technical scheme, the invention can be further improved as follows.
further, the waste oil regeneration treatment device comprises a filtering device, a dehydrating tower, a first alkaline washing tower, a heating furnace, a decompression tower and a second alkaline washing tower, wherein the filtering device is provided with a raw material inlet, the filtering device is connected with the dehydrating tower, the top of the dehydrating tower is sequentially connected with a dehydrating tower top oil gas water cooler and a dehydrating tower top liquid separating tank, a non-condensable gas outlet of the dehydrating tower top liquid separating tank is connected with the heating furnace through the first alkaline washing tower, an oil phase outlet is connected with a light oil tank through a light oil pump, a water phase outlet is connected with a sewage treatment device through a drainage pump, the bottom of the dehydrating tower is connected with the decompression tower through the heating furnace, the top of the decompression tower is sequentially connected with the decompressing tower top oil gas water cooler and the decompression tower top liquid separating tank, the non-condensable gas outlet of the decompression tower top liquid separating tank is connected with the second alkaline washing tower, and the oil phase outlet is connected with the top of the, one part is connected with a light oil tank through a light oil pump, a water phase outlet is connected with a sewage treatment device through a drainage pump, an oil phase outlet at the middle upper part of the vacuum tower is connected with a middle component oil tank through an oil pump, an oil phase outlet at the middle lower part of the vacuum tower is connected with a heavy component oil tank through an oil pump, the bottom of the vacuum tower is connected through an oil pump, one part is sent to the bottom of the vacuum tower to be used as quenching oil, and the other part is connected with a thermal phase separation device.
adopt above-mentioned further scheme's beneficial effect is, through setting up waste oil regeneration treatment device, fully retrieve the recycle to waste oil, no secondary pollution and waste product produce in the processing procedure, the treatment effeciency is high, and waste oil recovery handles thoroughly.
Furthermore, the filtering device, the dehydrating tower, the first alkaline washing tower, the heating furnace, the decompression tower and the second alkaline washing tower are all connected with a helium gas replacement device for replacing air with helium gas.
The beneficial effect who adopts above-mentioned further scheme is that, through setting up helium replacement device, replace the air in all equipment of waste oil regeneration processing apparatus, guarantee the security of system operation.
Furthermore, the sewage treatment device comprises a demulsification and oil removal device, a catalytic oxidation device and an evaporation and concentration device.
Adopt above-mentioned further scheme's beneficial effect is, through setting up breakdown of emulsion deoiling device, get rid of the petroleum class in the waste water, through setting up catalytic oxidation device, get rid of the organic matter in the waste water, through setting up the evaporation concentration device, concentrate the recovery and recycle to salt in the waste water to realize the zero pollutant discharge of sewage.
A process for treating dangerous waste of an offshore drilling platform comprises the following steps of (1) raw material pretreatment: the raw materials are subjected to preliminary sedimentation and layering through an oil separation sedimentation tank, the upper layer is floating oil, the lower layer is oily sewage, and the bottom layer is oil sludge sediment;
(2) Oil slick treatment: collecting floating oil by using a floating oil collector and feeding the collected floating oil into a waste oil regeneration treatment system;
(3) treating oily sewage: entering a sewage treatment system;
(4) oil sludge and sediment treatment: centrifuging oil sludge sediment to obtain centrifugal wastewater and centrifugal solid slag, feeding the centrifugal wastewater into a waste oil regeneration treatment system, and feeding the centrifugal solid slag into a cement kiln cooperative treatment system;
(5) Waste oil regeneration treatment: the method comprises pretreatment, a dehydration and temperature rise process and a reduced pressure distillation process, wherein waste oil is subjected to mechanical impurity filtering through a pretreated filtering device, the dehydration and temperature rise process is to dehydrate the pretreated waste oil through a dehydration tower to obtain light-component oil products, and the specific operation is as follows: steam stripping is adopted at the bottom of the dehydrating tower, the pretreated waste oil enters the dehydrating tower and is evaporated into oil gas, the oil gas enters an oil-gas water cooler at the top of the dehydrating tower from the top of the dehydrating tower and is cooled, the oil gas enters a liquid separation tank at the top of the dehydrating tower and is subjected to three-phase separation, the three-phase non-condensable gas is pressurized by a vacuum pump and then is subjected to alkali washing by an alkali washing tower and then enters a heating furnace for combustion, the three-phase medium oil phase is pressurized by a light oil pump at the top of the dehydrating tower and then is sent to a light oil tank for storage, the three-phase water phase is pressurized by a drainage pump and then is sent to a sewage;
(6) A sewage treatment system: the method comprises a demulsification deoiling process, a catalytic oxidation process and an evaporation concentration process, wherein the demulsification deoiling process is used for removing petroleum in the wastewater, the catalytic oxidation process is used for removing organic matters in the wastewater, and the evaporation concentration process is used for removing salts in the wastewater.
further, the vacuum distillation in the step (5) comprises the following specific operations: raw oil at the bottom of the dehydration tower enters a heating furnace to be heated and then enters a decompression tower, a: and (3) cooling the oil gas at the top of the pressure reducing tower by using an oil gas cooler at the top of the pressure reducing tower, and then feeding the cooled oil gas into a liquid separation tank at the top of the pressure reducing tower for three-phase separation: the three phases of non-condensable gas are pressurized by a vacuum pump and then are subjected to alkaline washing by an alkaline washing tower, and the light component oil phase in the three phases is pressurized by a light oil pump at the top of the tower and then is divided into two paths: one path of water phase is sent to the top of the pressure reducing tower to be used as reflux, the other path of water phase is sent to a light oil tank to be stored, the water phase in the three phases is sent to a sewage treatment system to be treated after being pressurized by a drainage pump, and b: and c, pressurizing the intermediate component oil phase extracted from the middle upper part of the pressure reducing tower by an oil pump, and then delivering the pressurized intermediate component oil phase to an intermediate component oil tank for storage, wherein: and d, pressurizing the heavy component oil phase pumped out from the middle lower part of the pressure reducing tower by an oil pump, and then sending the heavy component oil phase to a heavy component oil tank for storage: the vacuum residue at the bottom of the vacuum tower is pressurized by an oil pump and then divided into two paths: one path is sent to the bottom of the vacuum tower to be used as quenching oil, and the other path is sent to a thermal phase separation system to be treated.
furthermore, the waste oil regeneration treatment process also comprises a helium replacement process, and the helium replacement process is connected with a pretreatment process, a dehydration and temperature rise process and a reduced pressure distillation process.
Further, oil sludge generated in the treatment process of the demulsification and oil removal process is treated by an oil sludge centrifuge, centrifugal wastewater enters a waste oil regeneration treatment system, and centrifugal solid slag enters a cement kiln cooperative treatment system.
further, the evaporation concentration mother liquor generated by the evaporation concentration process returns to the demulsification and oil removal process for retreatment, and the generated concentrated salt is recycled.
Further, sludge generated in the demulsification deoiling process, the catalytic oxidation process and the evaporation concentration process is dehydrated through a plate-and-frame filter press, the obtained dry sludge enters a cement kiln cooperative treatment system, and the obtained filtrate returns to the demulsification deoiling process for retreatment.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic flow diagram of a waste oil regeneration treatment device.
In the figure, 1, a filtering device, 2, a dehydrating tower, 3, a first alkaline washing tower, 4, a heating furnace, 5, a pressure reducing tower, 6, a second alkaline washing tower, 7, a sewage treatment device, 8, a dehydrating tower top liquid separation tank, 9, a light oil tank, 10, a thermal phase separation device, 11, a decompressing tower top liquid separation tank, 12, an intermediate component oil tank and 13, a heavy component oil tank are arranged.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The utility model provides a dangerous waste gas processing apparatus of offshore drilling platform, includes oil separation sedimentation tank, oil slick collector, centrifuge, waste oil regeneration processing apparatus, sewage treatment plant and cement kiln and deals with the device in coordination, oil separation sedimentation tank connects the raw materials import, oil separation sedimentation tank is equipped with the three export of the degree of depth difference, is oil slick export, oily sewage export and fatlute sediment export respectively, the oil slick export is connected with waste oil regeneration processing apparatus through oil slick collector, oily sewage export is connected with sewage treatment plant, fatlute sediment export is connected with centrifuge, and centrifuge's centrifugal waste water export is connected with waste oil regeneration processing apparatus, and waste oil centrifuge's the export of the solid sediment of centrifugation is connected with cement kiln deals with the device in coordination.
The raw materials are pretreated by arranging the oil separation sedimentation tank, the waste oil on the surface layer of the oil separation sedimentation tank is collected by arranging the floating oil collector, the sludge and the sediment discharged from the oil separation sedimentation tank are centrifugally separated by the centrifugal machine, the waste oil in the centrifugal waste water generated by the centrifugal machine is further separated by the waste oil regeneration treatment device, the oily sewage separated from the oil separation sedimentation tank is subjected to oil-water separation by the sewage treatment device, the centrifugal solid sediment separated from the centrifugal machine is treated by the cement kiln cooperative treatment device, the hazardous waste generated by the offshore drilling platform is treated by the above devices, the oil recovery efficiency is high, the separated and recovered waste oil is completely used for producing base oil after being treated, the oil quality is high, the waste residue generated in the treatment process is treated by the cement kiln cooperative treatment device, and the harmlessness and the full utilization of heat energy are really realized, the method has the advantages of high treatment efficiency, good treatment effect, low pollution to marine environment and low cost.
The waste oil regeneration treatment device comprises a filtering device 1, a dehydrating tower 2, a first alkaline washing tower 3, a heating furnace 4, a decompression tower 5 and a second alkaline washing tower 6, wherein the filtering device 1 is provided with a raw material inlet, the filtering device 1 is connected with the dehydrating tower 2, the top of the dehydrating tower 2 is sequentially connected with a dehydrating tower top oil gas water cooler and a dehydrating tower top liquid separating tank 8, a non-condensable gas outlet of the dehydrating tower top liquid separating tank 8 is connected with the heating furnace 4 through the first alkaline washing tower 3, an oil phase outlet is connected with a light oil tank 9 through a light oil pump, a water phase outlet is connected with a sewage treatment device 7 through a drainage pump, the bottom of the dehydrating tower 2 is connected with the decompression tower 5 through the heating furnace 4, the top of the decompression tower 5 is sequentially connected with the decompressing tower top oil gas water cooler and the decompression tower top liquid separating tank 11, the non-condensable gas outlet of the decompression tower top liquid separating tank 11 is connected with the second alkaline, the oil phase export is connected the backward flow through pipeline partly and 5 top of the tower of vacuum tower, partly is connected with light oil jar 9 through the light oil pump, the water phase export is connected with sewage treatment plant 7 through the drain pump, the oil phase export of upper portion passes through oil pump connection intermediate component oil jar 12 in 5 middle and upper portions of vacuum tower, the oil phase export of lower part passes through oil pump connection heavy component oil jar 13 in 5 middle and lower parts of vacuum tower, 5 bottom of the tower passes through oil pump connection of vacuum tower, partly send to 5 bottoms of vacuum tower as quench oil, another part connects hot phase separation device 10, through setting up waste oil regeneration treatment device, fully retrieve the reuse to waste oil, no secondary pollution and waste product produce in the processing procedure, the treatment effeciency is high, waste oil recovery handles thoroughly.
The sewage treatment device comprises a demulsification deoiling device, a catalytic oxidation device and an evaporation concentration device, petroleum in the wastewater is removed by arranging the demulsification deoiling device, organic matters in the wastewater are removed by arranging the catalytic oxidation device, and salt in the wastewater is concentrated, recovered and recycled by arranging the evaporation concentration device, so that zero-pollution discharge of the sewage is realized.
A process for treating dangerous waste of an offshore drilling platform comprises the following steps of (1) raw material pretreatment: the raw materials are subjected to preliminary sedimentation and layering through an oil separation sedimentation tank, the upper layer is floating oil, the lower layer is oily sewage, and the bottom layer is oil sludge sediment;
(2) Oil slick treatment: collecting floating oil by using a floating oil collector and feeding the collected floating oil into a waste oil regeneration treatment system;
(3) treating oily sewage: entering a sewage treatment system;
(4) Oil sludge and sediment treatment: centrifuging oil sludge sediment to obtain centrifugal wastewater and centrifugal solid slag, feeding the centrifugal wastewater into a waste oil regeneration treatment system, and feeding the centrifugal solid slag into a cement kiln cooperative treatment system;
(5) Waste oil regeneration treatment: the method comprises pretreatment, a dehydration and temperature rise process and a reduced pressure distillation process, wherein waste oil is subjected to mechanical impurity filtering through a pretreated filtering device, the dehydration and temperature rise process is to dehydrate the pretreated waste oil through a dehydration tower to obtain light-component oil products, and the specific operation is as follows: the bottom of the dehydrating tower adopts steam stripping, the pretreated waste oil enters the dehydrating tower and then is evaporated into oil gas, the oil gas enters an oil gas water cooler at the top of the dehydrating tower from the top of the tower after being cooled, the oil gas enters a liquid separating tank at the top of the dehydrating tower after entering a water separating tank at the top of the dehydrating tower for three-phase separation, the non-condensable gas in the three phases is pressurized by a vacuum pump and then enters a heating furnace for combustion after being subjected to alkali washing by an alkali washing tower, the oil phase in the three phases is pressurized by a light oil pump at the top of the tower and then is sent to a sewage treatment system for treatment, the reduced pressure distillation process is to further separate heavy component raw oil at the bottom of the dehydrating tower: raw oil at the bottom of the dehydration tower enters a heating furnace to be heated and then enters a decompression tower, a: and (3) cooling the oil gas at the top of the pressure reducing tower by using an oil gas cooler at the top of the pressure reducing tower, and then feeding the cooled oil gas into a liquid separation tank at the top of the pressure reducing tower for three-phase separation: the three phases of non-condensable gas are pressurized by a vacuum pump and then are subjected to alkaline washing by an alkaline washing tower, and the light component oil phase in the three phases is pressurized by a light oil pump at the top of the tower and then is divided into two paths: one path of water phase is sent to the top of the pressure reducing tower to be used as reflux, the other path of water phase is sent to a light oil tank to be stored, the water phase in the three phases is sent to a sewage treatment system to be treated after being pressurized by a drainage pump, and b: and (2) pressurizing the intermediate component oil phase (the boiling point is 280-300 ℃) extracted from the middle upper part of the pressure reducing tower by an oil pump, and then sending the intermediate component oil phase to an intermediate component oil tank for storage, wherein the middle upper part refers to the upper part of the middle of the pressure reducing tower, and c: and (2) pressurizing a heavy component oil phase (the boiling point is 330-350 ℃) extracted from the middle lower part of the pressure reducing tower by an oil pump, and then sending the heavy component oil phase to a heavy component oil tank for storage, wherein the middle lower part refers to a part below the middle of the pressure reducing tower, and d: the vacuum residue at the bottom of the vacuum tower is pressurized by an oil pump and then divided into two paths: one path is sent to the bottom of the vacuum tower to be used as quenching oil, and the other path is sent to a thermal phase separation system to be treated.
(6) A sewage treatment system: the method comprises a demulsification deoiling process, a catalytic oxidation process and an evaporation concentration process, wherein the demulsification deoiling process is used for removing petroleum in the wastewater, the catalytic oxidation process is used for removing organic matters in the wastewater, and the evaporation concentration process is used for removing salts in the wastewater.
The waste oil regeneration treatment process also comprises a helium displacement process, and the helium displacement process is connected with a pretreatment process, a dehydration and temperature rise process and a reduced pressure distillation process.
The oil sludge produced in the demulsification and oil removal process is treated by an oil sludge centrifuge, the centrifugal wastewater enters a waste oil regeneration treatment system, and the centrifugal solid slag enters a cement kiln cooperative treatment system.
And the evaporation concentration mother liquor generated by the evaporation concentration process returns to the demulsification and oil removal process for retreatment, and the generated concentrated salt is recycled.
and sludge generated in the demulsification deoiling process, the catalytic oxidation process and the evaporation concentration process is dehydrated through a plate-and-frame filter press, the obtained dry sludge enters a cement kiln cooperative treatment system, and the obtained filtrate returns to the demulsification deoiling process for retreatment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides an offshore drilling platform hazardous waste processing apparatus which characterized in that: including separating oil sedimentation tank, oil slick collector, centrifuge, waste oil regeneration processing apparatus, sewage treatment plant and cement kiln in coordination with processing apparatus, separate oil sedimentation tank and connect the raw materials import, separate oil sedimentation tank and be equipped with the three export of the degree of depth difference, be oil slick export, oily sewage export and fatlute sediment export respectively, the oil slick export is connected with waste oil regeneration processing apparatus through oil slick collector, oily sewage export is connected with sewage treatment apparatus, fatlute sediment export is connected with centrifuge, and centrifuge's centrifugal waste water export is connected with waste oil regeneration processing apparatus, and centrifuge's the export of the solid sediment of centrifugation is connected with cement kiln in coordination with processing apparatus.
2. The apparatus of claim 1, wherein the apparatus comprises: the waste oil regeneration treatment device comprises a filtering device, a dehydrating tower, a first alkaline washing tower, a heating furnace, a decompression tower and a second alkaline washing tower, wherein the filtering device is provided with a raw material inlet, the filtering device is connected with the dehydrating tower, the top of the dehydrating tower is sequentially connected with a dehydrating tower top oil gas water cooler and a dehydrating tower top liquid separating tank, a non-condensable gas outlet of the dehydrating tower top liquid separating tank is connected with the heating furnace through the first alkaline washing tower, an oil phase outlet is connected with a light oil tank through a light oil pump, a water phase outlet is connected with a sewage treatment device through a drainage pump, the bottom of the dehydrating tower is connected with the decompression tower through the heating furnace, the top of the decompression tower is sequentially connected with the decompressing tower top oil gas water cooler and the decompression tower top liquid separating tank, the non-condensable gas outlet of the decompression tower top liquid separating tank is connected with the second alkaline washing tower, and the oil phase outlet is connected with the top of, one part is connected with a light oil tank through a light oil pump, a water phase outlet is connected with a sewage treatment device through a drainage pump, an oil phase outlet at the middle upper part of the vacuum tower is connected with a middle component oil tank through an oil pump, an oil phase outlet at the middle lower part of the vacuum tower is connected with a heavy component oil tank through an oil pump, the bottom of the vacuum tower is connected through an oil pump, one part is sent to the bottom of the vacuum tower to be used as quenching oil, and the other part is connected with a thermal phase separation device.
3. The apparatus of claim 2, wherein the apparatus comprises: and the filtering device, the dehydrating tower, the first alkaline washing tower, the heating furnace, the decompression tower and the second alkaline washing tower are all connected with a helium replacing device for replacing air with helium.
4. The apparatus of claim 1, wherein the apparatus comprises: the sewage treatment device comprises a demulsification deoiling device, a catalytic oxidation device and an evaporation concentration device.
5. A process for treating dangerous waste of an offshore drilling platform is characterized by comprising the following steps: the method comprises the following steps of (1) raw material pretreatment: the raw materials are subjected to preliminary sedimentation and layering through an oil separation sedimentation tank, the upper layer is floating oil, the lower layer is oily sewage, and the bottom layer is oil sludge sediment;
(2) Oil slick treatment: collecting floating oil by using a floating oil collector and feeding the collected floating oil into a waste oil regeneration treatment system;
(3) Treating oily sewage: entering a sewage treatment system;
(4) Oil sludge and sediment treatment: centrifuging oil sludge sediment to obtain centrifugal wastewater and centrifugal solid slag, feeding the centrifugal wastewater into a waste oil regeneration treatment system, and feeding the centrifugal solid slag into a cement kiln cooperative treatment system;
(5) Waste oil regeneration treatment: the method comprises pretreatment, a dehydration and temperature rise process and a reduced pressure distillation process, wherein waste oil is subjected to mechanical impurity filtering through a pretreated filtering device, the dehydration and temperature rise process is to dehydrate the pretreated waste oil through a dehydration tower to obtain light-component oil products, and the specific operation is as follows: steam stripping is adopted at the bottom of the dehydrating tower, the pretreated waste oil enters the dehydrating tower and is evaporated into oil gas, the oil gas enters an oil-gas water cooler at the top of the dehydrating tower from the top of the dehydrating tower and is cooled, the oil gas enters a liquid separation tank at the top of the dehydrating tower and is subjected to three-phase separation, the three-phase non-condensable gas is pressurized by a vacuum pump and then is subjected to alkali washing by an alkali washing tower and then enters a heating furnace for combustion, the three-phase medium oil phase is pressurized by a light oil pump at the top of the dehydrating tower and then is sent to a light oil tank for storage, the three-phase water phase is pressurized by a drainage pump and then is sent to a sewage;
(6) a sewage treatment system: the method comprises a demulsification deoiling process, a catalytic oxidation process and an evaporation concentration process, wherein the demulsification deoiling process is used for removing petroleum in the wastewater, the catalytic oxidation process is used for removing organic matters in the wastewater, and the evaporation concentration process is used for removing salts in the wastewater.
6. The process for treating dangerous waste of offshore drilling platform according to claim 5, wherein: the vacuum distillation in the step (5) is specifically carried out as follows: raw oil at the bottom of the dehydration tower enters a heating furnace to be heated and then enters a decompression tower, a: and (3) cooling the oil gas at the top of the pressure reducing tower by using an oil gas cooler at the top of the pressure reducing tower, and then feeding the cooled oil gas into a liquid separation tank at the top of the pressure reducing tower for three-phase separation: the three phases of non-condensable gas are pressurized by a vacuum pump and then are subjected to alkaline washing by an alkaline washing tower, and the light component oil phase in the three phases is pressurized by a light oil pump at the top of the tower and then is divided into two paths: one path of water phase is sent to the top of the pressure reducing tower to be used as reflux, the other path of water phase is sent to a light oil tank to be stored, the water phase in the three phases is sent to a sewage treatment system to be treated after being pressurized by a drainage pump, and b: and c, pressurizing the intermediate component oil phase extracted from the middle upper part of the pressure reducing tower by an oil pump, and then delivering the pressurized intermediate component oil phase to an intermediate component oil tank for storage, wherein: and d, pressurizing the heavy component oil phase pumped out from the middle lower part of the pressure reducing tower by an oil pump, and then sending the heavy component oil phase to a heavy component oil tank for storage: the vacuum residue at the bottom of the vacuum tower is pressurized by an oil pump and then divided into two paths: one path is sent to the bottom of the vacuum tower to be used as quenching oil, and the other path is sent to a thermal phase separation system to be treated.
7. The process for treating dangerous waste of offshore drilling platform according to claim 5, wherein: the waste oil regeneration treatment process also comprises a helium displacement process, and the helium displacement process is connected with a pretreatment process, a dehydration and temperature rise process and a reduced pressure distillation process.
8. The process for treating dangerous waste of offshore drilling platform according to claim 5, wherein: the oil sludge produced in the demulsification and oil removal process is treated by an oil sludge centrifuge, the centrifugal wastewater enters a waste oil regeneration treatment system, and the centrifugal solid slag enters a cement kiln cooperative treatment system.
9. The process for treating dangerous waste of offshore drilling platform according to claim 5, wherein: and the evaporation concentration mother liquor generated by the evaporation concentration process returns to the demulsification and oil removal process for retreatment, and the generated concentrated salt is recycled.
10. The process for treating dangerous waste of offshore drilling platform according to claim 5, wherein: and sludge generated in the demulsification deoiling process, the catalytic oxidation process and the evaporation concentration process is dehydrated through a plate-and-frame filter press, the obtained dry sludge enters a cement kiln cooperative treatment system, and the obtained filtrate returns to the demulsification deoiling process for retreatment.
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Application publication date: 20191210 |