CN106396320B - Mobile oil field oil-containing sludge biological and conditioning separation treatment device - Google Patents

Mobile oil field oil-containing sludge biological and conditioning separation treatment device Download PDF

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CN106396320B
CN106396320B CN201611145239.3A CN201611145239A CN106396320B CN 106396320 B CN106396320 B CN 106396320B CN 201611145239 A CN201611145239 A CN 201611145239A CN 106396320 B CN106396320 B CN 106396320B
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oil
sludge
water
biological
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CN106396320A (en
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刘萍
柳国政
王金山
王明琨
万亭君
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Daqing Haiyouqing Petroleum Science & Technology Co ltd
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Daqing Haiyouqing Petroleum Science & Technology Co ltd
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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
    • 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
    • C02F11/02—Biological treatment
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A movable oil field oil-containing sludge biological, conditioning and separating treatment device. The device is divided into a sludge treatment system such as a pretreatment screening process section, a primary oil sludge treatment process section, a secondary oil, water and sludge separation process section, a biological sludge treatment process section, an oil-water separation treatment process section, a silt treatment process section and the like. Each process section of the device is independently prized and modularized, the device is convenient to transport in a prizing mode, and the device is a mobile oily sludge treatment device which is simple, applicable, safe, reliable and capable of meeting the design principle of production and has the characteristics of scattered blocks of remote oil fields, factories and mines and the like and poor ground environmental conditions. The device possesses equipment and concentrates, a whole set of sled dress ization, is convenient for transport to each fatlute dispersion point, also can reach the treatment effect of fixed sludge treatment station simultaneously, offers convenience for the enterprise that the fatlute production volume is little, the position is remote.

Description

Mobile oil field oil-containing sludge biological and conditioning separation treatment device
The technical field is as follows:
the invention relates to a device for carrying out advanced treatment on oil-containing sludge in an oil field. Relates to a movable oil field oily sludge biological, quenching and tempering separation treatment device.
Background art:
with the development of oil fields, a large amount of oily sewage and oily sludge are generated in the development and production process of the oil fields. The oily sludge of the oil field mainly comprises oil sludge falling to the ground, sludge in a settling tank, sediment at the bottom of a structure of a sewage treatment plant, oil sludge of a three-phase separator, oil-spilling sludge generated in a production accident and the like. With the increase of petroleum exploration, development and production activities, the total amount of the produced oily sewage and oily sludge is continuously increased, and the tertiary oil recovery technology which causes environmental pollution becomes serious day by day becomes one of the main measures for improving the recovery ratio of crude oil. But also increases the difficulty of removing oil and suspended matters in water and the difficulty of treating oily sludge. Produced during oil extraction and processingThe raw large amount of oily sludge has great harm to production and ecological environment, and is a precious secondary resource which must be subjected to harmless treatment and resource utilization. Tempering-mechanical dewatering can effectively separate oil-water-mud, but the produced mud cake needs further treatment; the biological treatment can completely degrade organic matters in the oily sludge into CO 2 And H 2 O, but the degradation efficiency needs to be improved; the leaching rate of harmful substances can be greatly reduced by solidification; resource utilization becomes a development trend of the oily sludge treatment technology. Therefore, the device for preparing and separating the oily sludge by using the microorganisms adopts a treatment technology combining biology and materialization to the actual situation of the oily sludge in the production and development process of the oil field, so that the oily sewage reaches the reinjection standard of the oil field, and the harmless treatment of the oily sludge is realized.
The invention content is as follows:
in order to overcome the defects in the background technology, the invention aims to provide a mobile oil field oily sludge biological, conditioning and separating treatment device. The method has the characteristics of simplicity, applicability, safety, reliability and high efficiency.
The technical scheme adopted by the invention is as follows: the utility model provides a portable oil field oily sludge biology, quenching and tempering separation processing apparatus which characterized in that: the device is divided into a pretreatment screening process section (1), a primary oil sludge treatment process section (2), a secondary oil, water and sludge separation process section (3), a biological sludge treatment process section (4), an oil-water separation treatment process section (5) and a silt treatment process section (6);
the pretreatment screening process section (1) comprises a feeding screening machine, a three-stage oil-water separation screening pool and a 2mm vibrating screen;
the first-stage oil sludge treatment process section (2) comprises a group of stirring tempering tanks, and the outlet ends of 2mm vibrating screens are communicated with the inlet ends of the stirring tempering tanks through pipelines; the outlet end of the stirring tempering tank is communicated with the inlet ends of the two horizontal screws;
the secondary oil, water and mud separation process section (3) comprises a heating and stirring tempering tank, wherein one outlet end of the two-phase horizontal screw is communicated with the inlet end of the heating and stirring tempering tank, and the outlet end of the heating and stirring tempering tank is communicated with the inlet end of the three-phase horizontal screw;
the biological sludge treatment process section (4) comprises an aerobic biological treatment rotating disc device, wherein one outlet end of a three-phase horizontal spiral is communicated with an upper inlet of the aerobic biological treatment rotating disc device, the other outlet end of the three-phase horizontal spiral is communicated with a lower inlet of the aerobic biological treatment rotating disc device, the outlet end of the aerobic biological treatment rotating disc device is communicated with the inlet end of an anaerobic biological treatment rotating disc device, and the outlet end of the anaerobic biological treatment rotating disc device is communicated with the inlet end of a two-phase horizontal spiral A;
the oil-water separation treatment process section (5) comprises a three-phase butterfly separator, the inlet end of the three-phase butterfly separator is communicated with the third tank of the three-stage oil-water separation sieve tank, and the oil outlet of the three-phase butterfly separator is communicated with an oil storage tank; the water outlet of the three-phase butterfly separator is communicated with the second tank of the three-stage oil-water separation sieve tank, and the other part of water is discharged outside.
The silt treatment process section (6) comprises a 10mm orifice vibrating screen, the inlet end of the 10mm orifice vibrating screen is communicated with a 2mm vibrating screen, the outlet end of the 10mm orifice vibrating screen corresponds to the inlet end of a feeding machine A, the outlet end of the feeding machine A corresponds to the inlet end of a sand washer, and the outlet end of the sand washer corresponds to the inlet end of a feeding machine B;
aerobic biological treatment carousel device in the above-mentioned scheme includes the biological rotating disk casing, there is the carousel axle to pass at biological rotating disk casing middle part, drive arrangement is installed to the one end of carousel axle, carousel axle outer wall has the disc along the upwards evenly distributed of circumference, install rinse-system in the biological rotating disk casing of disc top, install the oxygen system that gives in the biological rotating disk casing of disc below, biological rotating disk casing bottom is equipped with conduction oil heating cavity, the internal electric heating pipe that is equipped with of conduction oil heating, biological rotating disk casing bottom intercommunication has the mud water pipe, biological rotating disk casing lower part is equipped with the muddy water entry, be equipped with the sample connection on the biological rotating disk casing of muddy water entry below, install level gauge and telethermometer on the lateral wall of biological rotating disk casing.
The disc in the scheme is attached with a biological film, and the biological film consists of a filler and a strain. The driving device, the electric heating pipe, the liquid level meter, the remote thermometer and the heat conducting oil heating cavity are controlled by the intelligent control cabinet.
The mobile oily sludge treatment device has the advantages that each process section of the device is independently prized and modularized, skid-mounted and convenient to transport, and the mobile oily sludge treatment device is simple, applicable, safe and reliable and meets the design principle of production for the characteristics of scattered blocks of remote oil fields, factories and mines and the like and poor ground environmental conditions. The device possesses equipment and concentrates, a whole set of sled dress ization, is convenient for transport to each fatlute dispersion point, also can reach the treatment effect of fixed sludge treatment station simultaneously, offers convenience for the enterprise that the fatlute production volume is little, the position is remote.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the construction of the rotating biological treatment disk apparatus of FIG. 1.
Fig. 3 is a schematic view of the external structure of fig. 2.
In the figure: 1-feeding screening machine, 2-three-level oil-water separation screening pool, 3-2mm vibrating screen, 4-stirring tempering tank, 5-two-phase horizontal screw, 6-heating stirring tempering tank, 7-three-phase horizontal screw, 8-aerobic biological treatment turntable device, 9-two-phase horizontal screw A, 10-three-phase butterfly separator, 11-oil storage tank, 12, 10mm orifice plate vibrating screen, 13-feeding machine A, 14-sand washer, 15, feeding machine B, 16, driving device, 17-biological turntable shell, 18-flushing system, 19-disc, 20-turntable shaft, 21-oxygen supply system, 22-sludge outlet pipe, 23-electric heating pipe, 24-1 sludge inlet, 24-2 water inlet, 25-level meter, 26-remote thermometer, 27-sampling port, 28-heat conducting oil heating cavity, 29-intelligent control cabinet, 30-contact reaction zone and 31-anaerobic biological treatment turntable device.
The specific implementation mode is as follows:
a movable oil field oily sludge biological and conditioning separation treatment device is divided into a pretreatment screening process section (1), a primary oil sludge treatment process section (2), a secondary oil, water and sludge separation process section (3), a biological sludge treatment process section (4), an oil-water separation treatment process section (5) and a silt treatment process section (6);
the pretreatment screening process section (1) comprises a feeding screening machine 1, a three-stage oil-water separation screening pool 2 and a 2mm vibrating screen 3; the main functions of the pretreatment screening process section are to remove sludge large-particle-size particles and change the flow state of the sludge. Raw materials enter the feeding screening machine 1, sludge enters the hopper through the hopper grating to remove solid particles larger than 20mm, and large-size stones, waste materials and woven sundries are removed and transported. The material after screening gets into tertiary profit and divides sieve pond 2, tertiary profit divides sieve pond 2 to constitute by three pond, and three pond is communicating, be equipped with the baffle between two adjacent ponds, the baffle is located below the surface of water in pond, the oily water mixture above the tertiary profit divides sieve pond 2 gets into three-phase butterfly separator 10 and carries out oil-water separation, the muddy water mixture after tertiary profit divides sieve pond 2 buffering, the separation, subside gets into 2mm shale shaker 3, get rid of the solid particle that is greater than 2mm through 2mm shale shaker 3, the solid particle that is greater than 2mm and the large granule sand mud that feeding sieve 1 discharged carry 10mm orifice plate shale shaker 12 and screen, get rid of the outward transport with bulky stone, waste material, woven goods debris. The pretreatment screening process section (1) mainly separates large particle impurities and can preliminarily separate a part of oil.
The first-stage oil sludge treatment process section (2) comprises a group of stirring tempering tanks 4, and the outlet ends of the stirring tempering tanks 4 are communicated with the inlet ends of two horizontal screws 5; the outlet end of the 2mm vibrating screen 3 is communicated with the inlet end of the stirring tempering tank 4 through a pipeline; the mud-water mixture passing through the 2mm vibrating screen 3 enters a stirring tempering tank 4 to stir and homogenize the fluidized sludge. Meanwhile, a cleaning agent, a regulator and a demulsifier are added to improve the conditioning effect, so that oil and mud are fully separated, and oil and water are fully demulsified. The oil, the water and the sludge are layered through static sedimentation, the upper layer of dirty oil overflows and is recovered, the lower layer of sewage and the sludge enter a two-phase horizontal screw 5 for treatment, the separated oil enters a three-level oil-water separation sieve pool 2, and the separated mud-water mixture enters a heating, stirring and tempering tank 6. And (3) further separating out a part of oil in the first-stage oil sludge treatment process section (2), and enabling the mud-water mixture to enter the next stage of separation.
The secondary oil, water and mud separation process section (3) comprises a heating and stirring tempering tank 6, and the outlet end of the heating and stirring tempering tank 6 is communicated with the inlet end of a three-phase horizontal screw 7; one of the outlet ends of the two-phase horizontal screw 5 is communicated with the inlet end of the heating and stirring tempering tank 6, the mud-water mixture separated by the two-phase horizontal screw 5 enters the heating and stirring tempering tank 6, the heating and stirring tempering tank 6 further heats, stirs and homogenizes fluidized sludge, and then the fluidized sludge enters the three-phase horizontal screw 7 for treatment, the three-phase horizontal screw 7 has the functions of sedimentation, separation and buffering, and mainly performs oil-water separation on the overflowed sludge and liquid, the separated oil enters the three-level oil-water separation sieve tank 2, and the separated mud and water respectively enter the aerobic biological treatment turntable device 8 for treatment. The second-stage oil, water and mud separation process section (3) further separates out a part of oil, and the mud-water mixture enters the next stage for separation.
The biological sludge treatment process section (4) comprises an aerobic biological treatment rotating disc device 8, one outlet end of a three-phase horizontal screw 7 is communicated with an upper inlet of the aerobic biological treatment rotating disc device 8, the other outlet end of the three-phase horizontal screw 7 is communicated with a lower inlet of the aerobic biological treatment rotating disc device 8, the outlet end of the aerobic biological treatment rotating disc device 8 is communicated with an inlet end of an anaerobic biological treatment rotating disc device 31, and the outlet end of the anaerobic biological treatment rotating disc device 31 is communicated with an inlet end of a two-phase horizontal screw A9; the aerobic biological treatment turntable device 8 is used for carrying out oxidative decomposition on organic matters in the sludge and sewage under the action of aerobic microbial enzyme. The anaerobic biological treatment turntable device 31 further performs oxidative decomposition on organic matters in the sludge and sewage under the action of aerobic microbial enzymes. The oxidized sludge and sewage enter a two-phase horizontal screw A9, the sludge separated from the two-phase horizontal screw A9 is discharged, and the sewage separated from the two-phase horizontal screw A9 enters a three-level oil-water separation sieve pool 2 to supplement the water amount in the three-level oil-water separation sieve pool 2, so that the flowing state of materials is ensured.
The oil-water separation treatment process section (5) comprises a three-phase butterfly separator (10), wherein the inlet end of the three-phase butterfly separator (10) is communicated with a third pool of a three-stage oil-water separation sieve pool (2), an oil-water mixture in the third pool of the three-stage oil-water separation sieve pool (2) enters the three-phase butterfly separator (10) for oil-water separation, the oil outlet of the three-phase butterfly separator (10) is communicated with an oil storage tank (11), and the oil separated by the three-phase butterfly separator (10) contains less than 0.5% of water and enters the oil storage tank (11); the water outlet of the three-stage oil-water separating screen pool 2 of the three-phase butterfly separator 10 is communicated with the second pool, and the other part of water is discharged outside. One part of water separated by the three-phase butterfly separator 10 is used as backflow water to be supplemented to the three-stage oil-water separation sieve pool 2, so that the materials in the three-stage oil-water separation sieve pool 2 are ensured to be in a fluid state, and redundant clean water is discharged.
The silt treatment process section (6) comprises a 10mm orifice plate vibrating screen 12, the inlet end of the 10mm orifice plate vibrating screen 12 is communicated with a 2mm vibrating screen 3, the outlet end of the 10mm orifice plate vibrating screen 12 corresponds to the inlet end of a feeding machine A13, the outlet end of the feeding machine A13 corresponds to the inlet end of a sand washer 14, and the outlet end of the sand washer 14 corresponds to the inlet end of a feeding machine B15; the 10mm orifice plate shale shaker 12 screens the filth that 2mm shale shaker 3 and feeding sieve separator 1 were carried, and the filth that is greater than 10mm transports outward, and the filth that is greater than 10mm gets into sand washer 14 through material loading machine A13 and washs, and the filth after the washing transports outward through material loading machine B15.
The aerobic biological treatment rotating disc device 8 comprises a biological rotating disc shell 17, a rotating disc shaft 20 penetrates through the middle of the biological rotating disc shell 17, a driving device 16 is installed at one end of the rotating disc shaft 20, disc sheets 19 are uniformly distributed on the outer wall of the rotating disc shaft 20 along the circumferential direction, the disc sheets 19 rotate in the biological rotating disc shell 17 along with the rotating disc shaft 20, biological films are attached to the disc sheets 19, a flushing system 18 is installed in the biological rotating disc shell 17 above the disc sheets 19, the flushing system 18 flushes the biological films on the disc sheets 19 at regular time, an oxygen supply system 21 is installed in the biological rotating disc shell 17 below the disc sheets 19, the oxygen supply system 21 supplies oxygen to the biological rotating disc shell 17, a heat-conducting oil heating cavity 28 is arranged at the bottom of the biological rotating disc shell 17, an electric heating pipe 23 is arranged in the heat-conducting oil heating cavity 28, the heat-conducting oil heating cavity 28 has a heating effect on heating sewage entering sludge in the biological rotating disc shell 17, the bottom end of the biological rotating disc shell 17 is communicated with a sludge outlet pipe 22, a sludge inlet 24-1 and a water inlet 24-2 are arranged at the lower part of the biological rotating disc shell 17, a biological rotating disc shell 17 is provided with a sludge inlet 27, and a liquid level meter 25 and a remote thermometer 26 are installed on the side wall of the biological rotating disc shell 17.
The area of a disc 19 of the aerobic biological treatment turntable device 8 is about 40 percent and is immersed in the sewage in the tank, and a rotating shaft is 10 to 25cm higher than the water surface; the disks 19 are connected in a pulling and inserting mode, the rotating disk shaft 20 is a hollow pipe, and two ends of the rotating disk shaft 20 are arranged on a support of a contact reaction zone 30 of the biological rotating disk shell 17. When the disk 19 rotates slowly and is immersed in the sewage flowing slowly in the contact reaction area 30, organic matters in the sewage are adsorbed by a biological film bred on the disk 19, and the biological film consists of a filler and strains; when the disk 19 leaves the sewage, a thin water film formed on the surface of the disk absorbs oxygen from the air, the dissolved oxygen concentration is increased, and the adsorbed organic matters are oxidized and decomposed under the action of strains. The disk 19 is rotated continuously, and the organic matters in the sewage are decomposed continuously. When the thickness of the biological film is increased to a certain thickness, an anaerobic layer is formed in the biological film, the biological film begins to age and peel off, and the fallen biological film is settled and removed by a secondary sedimentation tank. Compared with the aerobic biological treatment rotating disc device 8, the anaerobic biological treatment rotating disc device 31 has the same structure without an oxygen supply system, and most or all of the discs of the anaerobic biological treatment rotating disc are immersed in water. The disc rotates slowly and is immersed in the sewage flowing slowly in the contact reaction tank, the biological film bred on the disc is fully contacted and adsorbed with organic matters in the sewage, and the adsorbed organic matters are subjected to reverse digestion decomposition reaction under the action of strains. The shear force acting on the biofilm while the disk is rotating causes the aged biofilm to peel off continuously, so that the biofilm can always keep higher activity. The washing system 18 can wash the disc regularly, and the driving device 16, the electric heating tube 23, the liquid level meter 25, the remote thermometer 26 and the heat conducting oil heating cavity 28 are controlled by the intelligent control cabinet 29, so that a movable bioreactor which is beneficial to biological reaction and has stable temperature, adjustable speed of the rotating disc and controllable liquid level height is formed.
The sludge is mainly decomposed by a biological sludge treatment process section (4), after flora decomposition, activated sludge is converted into biological organic sludge, then the biological organic sludge enters a two-phase horizontal screw to concentrate the sludge discharged by the microbial treatment process section (4), and the biological organic sludge with the water content of less than 75% and the oil content of less than 2% after dehydration is discharged. Water discharged by the two-phase horizontal screw enters a three-stage oil-water separating screen pool 2, an oil-water mixture in the three-stage oil-water separating screen pool 2 enters a three-phase butterfly type separator 10, and oil separated by the three-phase butterfly type separator 10 is recycled into an oil storage tank 11, wherein the water content of the oil is less than or equal to 0.5%; one part of the separated water is supplemented to the three-stage oil-water separation sieve pool 2, and the other part of the separated water is discharged to an oil field sewage system.

Claims (3)

1. The utility model provides a biological, quenching and tempering separation processing apparatus of portable oil field oily sludge which characterized in that: the device is divided into a pretreatment screening process section (1), a primary oil sludge treatment process section (2), a secondary oil, water and sludge separation process section (3), a biological sludge treatment process section (4), an oil-water separation treatment process section (5) and a silt treatment process section (6);
the pretreatment screening process section (1) comprises a feeding screening machine (1), a three-level oil-water separation screening pool (2) and a 2mm vibrating screen (3); raw materials enter a feeding screening machine (1), sludge enters a hopper through a hopper grid to remove solid particles larger than 20mm, stones, waste materials and woven sundries are removed and transported outwards, the screened materials enter a three-stage oil-water separation screening pool (2), the three-stage oil-water separation screening pool (2) consists of three pools, the three pools are communicated, a partition plate is arranged between every two adjacent pools and is positioned below the water surface of each pool, an oil-water mixture on the three-stage oil-water separation screening pool (2) enters a three-phase butterfly type separator (10) to be subjected to oil-water separation, a mud-water mixture subjected to buffering, separation and sedimentation in the three-stage oil-water separation screening pool (2) enters a 2mm vibrating screen (3), the solid particles larger than 2mm are removed through the 2mm vibrating screen (3), the solid particles larger than 2mm and large-particle sand mud discharged by the feeding screening machine (1) are conveyed to a 10mm pore plate vibrating screen (12) to screen the stones, the waste materials and the woven sundries, the woven sundries are removed and transported outwards;
the first-stage oil sludge treatment process section (2) comprises a group of stirring tempering tanks (4), and the outlet ends of 2mm vibrating screens (3) are communicated with the inlet ends of the stirring tempering tanks (4) through pipelines; the outlet end of the stirring tempering tank (4) is communicated with the inlet ends of two horizontal screws (5); the sludge-water mixture passing through a 2mm vibrating screen (3) enters a stirring tempering tank (4) to stir and homogenize fluidized sludge, meanwhile, a cleaning agent, a regulator and a demulsifier are added to improve the tempering effect, so that oil and sludge are fully separated, the oil and the water are fully demulsified, the oil, the water and the sludge are layered through static sedimentation, the upper layer sump oil overflows and is recovered, the lower layer sewage and the sludge enter a two-phase horizontal screw (5) to be treated, the separated oil enters a three-level oil-water separation screen pool (2), and the separated sludge-water mixture enters a heating stirring tempering tank (6); the first-stage oil sludge treatment process section (2) further separates out a part of oil, and the mud-water mixture enters the next stage of separation;
the secondary oil, water and mud separation process section (3) comprises a heating and stirring tempering tank (6), wherein one outlet end of a two-phase horizontal screw (5) is communicated with the inlet end of the heating and stirring tempering tank (6), and the outlet end of the heating and stirring tempering tank (6) is communicated with the inlet end of a three-phase horizontal screw (7); the sludge-water mixture separated by the two-phase horizontal screw (5) enters a heating and stirring tempering tank (6), the heating and stirring tempering tank (6) further heats, stirs and homogenizes fluidized sludge, and then the sludge enters a three-phase horizontal screw (7) for treatment, the three-phase horizontal screw (7) has the functions of sedimentation, separation and buffering, oil-water separation is mainly carried out on the sludge and liquid overflowing out, the separated oil enters a three-level oil-water separation sieve pool (2), the separated sludge and water respectively enter an aerobic biological treatment turntable device (8) for treatment, a second-level oil, water and sludge separation process section (3) further separates a part of oil, and the sludge-water mixture enters the next-level separation;
the biological sludge treatment process section (4) comprises an aerobic biological treatment rotating disc device (8), one outlet end of a three-phase horizontal screw (7) is communicated with an upper inlet of the aerobic biological treatment rotating disc device (8), the other outlet end of the three-phase horizontal screw (7) is communicated with a lower inlet of the aerobic biological treatment rotating disc device (8), the outlet end of the aerobic biological treatment rotating disc device (8) is communicated with an inlet end of an anaerobic biological treatment rotating disc device (31), and the outlet end of the anaerobic biological treatment rotating disc device (31) is communicated with an inlet end of a two-phase horizontal screw A (9); the aerobic biological treatment rotating disc device (8) is used for carrying out oxidative decomposition on organic matters in the sludge sewage under the action of aerobic microbial enzymes, the anaerobic biological treatment rotating disc device (31) is used for further carrying out oxidative decomposition on the organic matters in the sludge sewage under the action of the aerobic microbial enzymes, the oxidized sludge sewage enters a two-phase horizontal screw A (9), the sludge separated by the two-phase horizontal screw A (9) is discharged outside, the sewage separated by the two-phase horizontal screw A (9) enters a three-level oil-water separation sieve tank (2) to supplement the water quantity in the three-level oil-water separation sieve tank (2), and the flowing state of materials is ensured;
the oil-water separation treatment process section (5) comprises a three-phase butterfly separator (10), the inlet end of the three-phase butterfly separator (10) is communicated with the third tank of the three-stage oil-water separation sieve tank (2), and the oil outlet of the three-phase butterfly separator (10) is communicated with an oil storage tank (11); a water outlet of the three-phase butterfly separator (10) is communicated with a second tank of the three-stage oil-water separation sieve tank (2), and the other part of water is discharged; the oil separated by the three-phase butterfly separator (10) contains less than 0.5 percent of water and enters an oil storage tank (11); a water outlet of the three-stage oil-water separation tank (2) of the three-phase butterfly separator (10) is communicated with the second tank, and the other part of water is discharged; one part of water separated by the three-phase butterfly separator (10) is used as return water and supplemented to the three-stage oil-water separation sieve pool (2), so that the material of the three-stage oil-water separation sieve pool (2) is ensured to be in a fluid state, and redundant clean water is discharged;
the silt treatment process section (6) comprises a 10mm orifice plate vibrating screen (12), the inlet end of the 10mm orifice plate vibrating screen (12) is communicated with a 2mm vibrating screen (3), the outlet end of the 10mm orifice plate vibrating screen (12) corresponds to the inlet end of a feeding machine A (13), the outlet end of the feeding machine A (13) corresponds to the inlet end of a sand washer (14), and the outlet end of the sand washer (14) corresponds to the inlet end of a feeding machine B (15); the 10mm orifice plate vibrating screen (12) screens the dirt conveyed by the 2mm vibrating screen (3) and the feeding screening machine (1), the dirt larger than 10mm is conveyed outwards, the dirt larger than 10mm enters a sand washer (14) through a feeding machine A (13) to be cleaned, and the cleaned dirt is conveyed outwards through a feeding machine B (15);
the aerobic biological treatment rotating disc device (8) comprises a rotating disc shell (17), a rotating disc shaft (20) penetrates through the middle of the rotating disc shell (17), a driving device (16) is installed at one end of the rotating disc shaft (20), disc sheets (19) are uniformly distributed on the outer wall of the rotating disc shaft (20) along the circumferential direction, a flushing system (18) is installed in the rotating disc shell (17) above the disc sheets (19), the flushing system (18) flushes a biological membrane on the disc sheets (19) at regular time, an oxygen supply system (21) is installed in the rotating disc shell (17) below the disc sheets (19), a heat conduction oil heating cavity (28) is arranged at the bottom of the rotating disc shell (17), an electric heating pipe (23) is arranged in the heat conduction oil heating cavity (28), a sludge outlet pipe (22) is communicated with the bottom end of the rotating disc shell (17), a sludge inlet (24-2) and a water inlet (24-2) are arranged at the lower part of the rotating disc shell (17), a sampling port (27) is arranged on the rotating disc shell (17) below the water inlet (24-2), and a liquid level meter (25) and a remote thermometer (26) are installed on the side wall of the rotating disc shell (17);
40 percent of the area of a disc (19) of the aerobic biological treatment turntable device (8) is immersed in the sewage in the tank, and the rotating shaft is 10-25cm higher than the water surface; the disks (19) are connected in a pulling and inserting mode, the rotating disk shaft (20) is a hollow pipe, two ends of the rotating disk shaft (20) are arranged on a support of a contact reaction area (30) of the biological rotating disk shell (17), when the disks (19) slowly rotate and are immersed in sewage flowing in the contact reaction area (30), organic matters in the sewage are adsorbed by a biological film bred on the disks (19), and the biological film consists of fillers and strains; when the disc (19) leaves sewage, a thin water film formed on the surface of the disc absorbs oxygen from the air, the oxygen dissolved concentration is increased, and meanwhile, the adsorbed organic matters are oxidized and decomposed under the action of strains, compared with an aerobic biological treatment rotary disc device (8), the anaerobic biological treatment rotary disc device (31) has the same structure as the rest of an oxygen supply system, the disc of the anaerobic biological treatment rotary disc is completely immersed in the water, the disc is immersed in the sewage flowing in the contact reaction tank in a rotating way, the biological film bred on the disc is fully contacted and adsorbed with the organic matters in the sewage, the adsorbed organic matters are subjected to a reverse digestion and decomposition reaction under the action of the strains, the shearing force acted on the biological film when the disc rotates enables the aged biological film to be continuously peeled off, and the flushing system (18) can regularly flush and drive the disc (16);
the method comprises the steps that sludge is mainly decomposed by a biological sludge treatment process section (4), activated sludge is converted into biological organic sludge after flora decomposition, then the biological organic sludge enters a two-phase horizontal screw to concentrate sludge discharged by the microbial treatment process section (4), the water content of the dewatered sludge is less than 75%, the oil content of the dewatered sludge is less than 2%, the biological organic sludge is discharged outside, water discharged by the two-phase horizontal screw enters a three-level oil-water separation sieve pool (2), an oil-water mixture in the three-level oil-water separation sieve pool (2) enters a three-phase butterfly separator (10), and oil separated by the three-phase butterfly separator (10) returns to an oil storage tank (11) with the water content of less than or equal to 0.5%; one part of the separated water is supplemented back to the tertiary oil-water separation sieve pool (2), and the other part of the separated water is discharged to an oil field sewage system.
2. The mobile oil field oily sludge biological, conditioning and separating treatment device according to claim 1, which is characterized in that: the disc (19) is attached with a biological film which consists of a filler and a strain.
3. The mobile oil field oily sludge biological, conditioning and separating treatment device according to claim 1, which is characterized in that: the driving device (16), the electric heating pipe (23), the liquid level meter (25), the remote thermometer (26) and the heat conducting oil heating cavity (28) are controlled by an intelligent control cabinet (29).
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CN108467169A (en) * 2018-04-20 2018-08-31 中国石油大学(华东) A kind of biological prosthetic skid mounted equipment for oily sludge
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CN117902788A (en) * 2024-03-19 2024-04-19 山东金泽尔冷暖设备有限公司 Sewage recycling device and sewage recycling method

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