Floor oil sludge pretreatment device

Abstract

The utility model relates to the technical field of machinery, in particular to a landing oil sludge pretreatment device which comprises a crushing device, the crushing device is a double-shaft shredding machine, and the feeding port end of the double-shaft shredding machine is connected with the discharging end of a feeding device and used for crushing conveyed large oil sludge materials. The primary screening device comprises a barrel-shaped screening structure, and the discharging port end of the crushing device is connected with the feeding port end of the barrel-shaped screening structure and used for screening the crushed oil sludge materials according to the particle size; a heating coil pipe is installed on one side in the desanding and backflushing device, a stirring device is installed in the desanding and backflushing device, and the material inlet end of the desanding and backflushing device is connected with the liquid outlet end of the bottom of the other end of the cylindrical screening structure and the liquid inlet end of a reuse water system; the discharging end of the desanding backflushing device is communicated with a feeding hole in one end of the first-stage screening device through a pipeline; the screening device is good in screening effect and does not generate secondary pollution.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field, concretely relates to a floor oil sludge pretreatment device. BACKGROUND

[0002] Oil sludge is produced in the oil field production process, and its cause is due to the oil drilling exploitation, storage, gathering and transportation, processing, and oil sludge mortar containing oil produced in the process of produced liquid treatment; it is mainly divided into: floor oil sludge, tank cleaning oil sludge, etc.

[0003] At present, a large amount of impurities in the floor oil sludge is removed by the traditional physical method, and the traditional physical method includes mechanical crushing, screening and magnetic separation and other means, although the physical method can remove part of the impurities to some extent, but there are some problems: first, the existing mechanical crushing adopts single shaft crushing device to crush a large amount of impurities, and the crushing efficiency is low; the impurities treated by the machine are screened, and the screening process is not good for the fine or strong adhesion impurities; second, dust, waste residue and other pollutants are generated in the screening process, and secondary pollution is generated;

[0004] Therefore, it is necessary to design a floor oil sludge pretreatment device to improve the above problems. SUMMARY

[0005] In order to solve the problems of the prior art, the utility model provides a floor oil sludge pretreatment device, which comprises a crushing device, the crushing device is a double shaft shredder, which is used for crushing large block oil sludge material;

[0006] A first screening device, the first screening device comprises a cylindrical screening structure, the discharge port end of the crushing device is connected with the inlet port end of the cylindrical screening structure, and the first screening device is used for screening the particle size of the crushed oil sludge material;

[0007] A sand removal back flushing device, a heating disc unit is installed on one side in the sand removal back flushing device, and a stirring device is installed in the sand removal back flushing device, the material inlet end of the sand removal back flushing device is connected with the liquid outlet end of the cylindrical screening structure and the liquid inlet end of the recycled water system respectively, the discharge end of the sand removal back flushing device is communicated with the inlet port end of the first screening device through a back material pipeline, a back flushing booster pump is installed on the back material pipeline, the back flushing booster pump is used for separating the adhesion material in the oil sludge material by heating the heating disc unit and stirring by the stirring device, and the separated oil sludge material is back flushed to the first screening device for large particle screening of the oil sludge material again;

[0008] A second screening device, the second screening device is a linear vibrating screen, the discharge end of the sand removal back flushing device is also connected with the inlet end of the linear vibrating screen, and the second screening device is used for sending oil and water and fine particles in the material into the second screening device for fine screening.

[0009] Further, the device further comprises a feeding device for conveying the bulk oil sludge material, and the feeding port of the double-shaft shredder is connected with the discharging port of the feeding device.

[0010] Further, the discharging port of the cylindrical screening structure is connected with the incineration equipment through a discharging pipeline, and a pump body is arranged on the discharging pipeline, so as to extract the unqualified oil sludge material in the primary screening device for incineration treatment.

[0011] Further, the feeding port of the cylindrical screening structure is connected with the liquid outlet of the recycling water system, and the liquid inlet of the recycling water system is respectively connected with a sewage discharge system and a resource recovery device, so as to flush the oil sludge material on the inner wall of the primary screening device.

[0012] Further, the heating coil unit is a heating coil pipe, the overall height of the heating coil pipe is two-thirds of the height of the sand removal back flushing device, and a gap is left between the bottom layer of the heating coil unit and the bottom of the sand removal back flushing device.

[0013] Further, the two ends of the heating coil pipe are connected with the gas boiler through pipelines, so as to heat the heating coil pipe through steam.

[0014] Further, the device further comprises a resource recovery device, and the resource recovery device comprises two-stage conditioning structures and a centrifugal separation structure which are connected in sequence, the feeding port of the two-stage conditioning structure is connected with the discharging port of the sand removal back flushing device, and the discharging port of the two-stage conditioning structure is connected with the centrifugal separation structure, so as to obtain the fine-screened oil sludge material particles.

[0015] The device has the following beneficial effects:

[0016] The device is provided with the crushing device, the primary screening device, the sand removal back flushing device and the secondary screening device which are connected in sequence, the crushing device adopts the double-shaft shredder to improve the crushing efficiency, the recycling water system is connected with the primary screening device and the sand removal back flushing device, so that no dust is generated in the screening process to cause secondary pollution, the heating coil pipe is arranged on one side wall of the sand removal back flushing device, the two ends of the heating coil pipe are connected with the gas boiler through pipelines, the mixer is arranged in the sand removal back flushing device, the heating coil pipe and the mixer are heated through steam, the physical properties of the fluid are changed, the adherent substances in the mechanically crushed oil sludge are separated, and the fine particles in the separated material are sent into the secondary screening device for fine screening, so that the screening effect of the fine or strongly adherent impurities in the screening process is good. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structure schematic view of the floor oil sludge pretreatment device.

[0018] Fig. 2The utility model discloses a sand removing back flushing device's front view;

[0019] Fig. 3 The utility model discloses a heating coil structure schematic diagram;

[0020] Reference signs:

[0021] In the drawing: 1 - feeding device, 2 - crushing device, 3 - primary screening device, 4 - sand removing back flushing device, 5 - secondary screening device, 6 - resource recovery device, 7 - recycled water system, 8 - gas boiler, 9 - back flushing lift pump, 10 - steam inlet, 11 - steam outlet, 12 - heating coil. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] Please refer to Figs. 1-3 The utility model provides a floor oil sludge pretreatment device, include:

[0024] Feeding device 1 is used for conveying bulky oil sludge material, wherein the feeding device 1 adopts belt conveying feeding;

[0025] Crushing device 2, the crushing device 2 is double shaft shredder, the feed inlet end of double shaft shredder is connected with the discharge end of feeding device 1, is used for conveying bulky oil sludge material and is broken;

[0026] Primary screening device 3, the primary screening device 3 includes cylindrical screening structure, the discharge end of crushing device 2 is connected with the feed inlet end of cylindrical screening structure, is used to screen the particle size of oil sludge material after crushing;

[0027] Wherein, when the material enters the drum through the feed inlet end of cylindrical screening structure (drum), due to the inclination and rotation of cylindrical screening structure, the material on cylindrical screening structure overturns and rolls, and the qualified small particle material is discharged through the liquid outlet at the bottom of cylindrical screening structure, and the unqualified large particle material is discharged through the discharge port of cylindrical screening structure and connected with incineration equipment, for harmless disposal of unqualified material through incineration equipment;

[0028] The sand removal back flushing device 4 is provided with a heating disc unit on one side, the heating disc unit is a heating disc pipe 12, and the sand removal back flushing device 4 is provided with a stirring device, which is a stirrer. The purpose of adding steam in the heating disc pipe 12 is to ensure the activity of the oil sludge and prevent blockage and adhesion to the wall. The nominal diameter of the heating disc pipe is 50 mm. The gas inlet end and the gas outlet end of the heating disc pipe 12 are connected to the gas boiler 8 through the pipeline of the steam inlet 10 and the steam outlet 11. The sand removal back flushing device 4 is provided with a back flushing lifting pump 9 at the top. The discharge end of the sand removal back flushing device 4 is communicated with the primary screening device 3 through the back flushing lifting pump 9.

[0029] The material inlet end of the sand removal back flushing device 4 is connected with the liquid outlet end of the cylindrical screening structure and the liquid inlet end of the recycled water system 7 respectively. The discharge end of the sand removal back flushing device 4 is communicated with the material inlet end of the primary screening device 3 through a back material pipeline. The back material pipeline is provided with a back flushing lifting pump 9. The back flushing lifting pump 9 is used to separate the adhesive substances in the oil sludge material by heating the heating disc pipe 12 through steam and stirring through the stirring device. The separated oil sludge material is back flushed to the primary screening device 3 through the back flushing lifting pump 9 for screening of large particles of the oil sludge material.

[0030] The secondary screening device 5 is a linear vibrating screen. The discharge end of the sand removal back flushing device 4 is also connected with the inlet end of the linear vibrating screen, so as to send the oil and water and small particles in the material into the secondary screening device 5 for fine screening.

[0031] It should be noted that the primary screening device 3 adopts a shaftless drum screen. The larger size impurities and particles are first separated. The larger size impurities adhered to the shaftless drum screen arm are washed down by the recycled water. The washing waste water, together with small particles and oil sludge, enters the sand removal back flushing device 4.

[0032] The heating disc pipe 12 in the sand removal back flushing device 4 is connected to the gas boiler 8 at both ends. The adhesive substances in the oil sludge material are separated by heating the heating disc pipe 12 through steam. The separated oil sludge material is back flushed to the primary screening device 3 through the back flushing lifting pump 9. The oil and water and small particles in the material are sent to the secondary screening device 5, so as to improve the sand removal efficiency, change the physical properties of the fluid, such as reducing the viscosity, so that the material particles are more easily separated. The back flushing system of the sand removal back flushing device 4 is reasonably designed, so as to ensure the stable back flow of the liquid and not affect the continuity of the whole process.

[0033] Further, the discharge port of the cylindrical screening structure is connected with the incineration equipment through a discharge pipeline. A pump body is arranged on the discharge pipeline, which is used to extract the unqualified oil sludge material in the primary screening device for incineration treatment.

[0034] Further, the inlet end of the cylindrical screening structure is connected with the liquid outlet end of the reclaimed water system 7, and the liquid inlet end of the reclaimed water system 7 is respectively connected with a sewage system and a resource recycling device 6, which is used to flush the oil sludge material on the inner wall of the primary screening device;

[0035] Further, the heating disc unit is a heating disc pipe 12, the overall height of the heating disc pipe 12 is two-thirds of the height of the sand removal back flushing device 4, and a gap is left between the bottommost layer of the heating disc pipe 12 and the bottom of the sand removal back flushing device 4; wherein the nominal diameter of the heating disc pipe 12 is 50mm, the overall height of the heating disc pipe 12 is two-thirds of the height of the sand removal back flushing device 4, and the distance between the bottom end of the heating disc pipe 12 and the bottom of the sand removal back flushing device 4 is 10cm.

[0036] Further, the heating disc pipe 12 is connected to the gas boiler 8 at both ends through a pipeline, which is used to introduce steam into the heating disc pipe 12 to heat the heating disc pipe 12, so that the adherent substances in the oil sludge in the sand removal back flushing device 4 are separated out;

[0037] Wherein, the steam is a factory gas boiler 8, the input end of the reclaimed water system 7 is respectively connected with the liquid outlet end of the sewage system and the resource recycling device 6, and the reclaimed water comes from the sewage system of the factory sewage station and the water separated from the resource recycling device 6.

[0038] Further, the device further comprises a resource recycling device 6, which comprises two-stage conditioning structures and a centrifugal separation structure connected in sequence, the feed end of the two-stage conditioning structure is connected with the discharge end of the sand removal back flushing device 4, and the discharge end of the two-stage conditioning structure is connected with the centrifugal separation structure, which is used to obtain fine screening of oil sludge material particles;

[0039] Wherein, the resource recycling device 6 comprises two-stage conditioning structures and a centrifugal separation structure connected in sequence, the feed end of the two-stage conditioning structure is connected with the discharge end of the sand removal back flushing device 4, and the discharge end of the two-stage conditioning structure is connected with the centrifugal separation structure, which adopts a two-stage conditioning hot water washing + two-stage centrifugal separation process, specifically, the pretreated material of the oil sludge falls to the ground and then enters the two-stage conditioning structure for conditioning and cleaning, mainly through heating and chemical agent demulsification, so as to separate and detach the adhered oil. The liquid phase part is separated by the oil-water centrifugal separation structure, and fine screening of oil sludge material particles is obtained, the separated water is introduced into the sand removal back flushing device 4 for back flushing of the material in the sand removal back flushing device 4;

[0040] It should be noted that the present application is provided with double-shaft shredder, primary screening device 3 and sand removal back flushing device 4 which are sequentially communicated; the double-shaft shredder is used in the crushing device 2 to crush the large oil sludge into smaller particles, compared with the single-shaft mechanical crushing in the prior art, the double-shaft shredder has high shearing and tearing force, the double-shaft shredding increases the surface area of the oil sludge, has strong crushing capacity, can handle oil sludge agglomerates of various hardness and size, realizes efficient material crushing, and thus improves the crushing efficiency;

[0041] Since the liquid inlet ends of the primary screening device 3 and the sand removal back flushing device 4 are connected with the liquid outlet end of the recycled water system 7, the recycled water is introduced into the primary screening device 3 and the sand removal back flushing device 4 through the recycled water system 7, so that the oil sludge impurities will not produce dust, waste residue and other pollutants to cause secondary pollution in the screening process after mechanical crushing; the sand removal back flushing device 4 is of a rectangular structure, a heating coil 12 is installed on one side wall of the sand removal back flushing device 4, the distance from the bottom of the heating coil 12 to the bottom of the sand removal back flushing device 4 is 10 cm, the distance from the top of the heating coil 12 to the top of the sand removal back flushing device 4 is one third of the height of the sand removal back flushing device 4, and a stirrer is installed in the sand removal back flushing device 4 to stir the material in the sand removal back flushing device 4 to improve the fluidity of the material and prevent the material from depositing; the heating coil 12 and the stirrer are heated by steam to change the physical properties of the fluid, separate the adhesive substances in the oil sludge after mechanical crushing, and send the fine particles in the material to the secondary screening device 5 for fine screening, the secondary screening device 5 uses a linear vibrating screen which includes a vibrating motor and a screen mesh, the vibrating motor is connected with the screen mesh at the output end to screen the water and fine particles after sand removal more finely, separate the fine impurities and particles, and improve the purity of the oil sludge;

[0042] The primary screening device 3 uses a shaftless drum screen to preliminarily screen the crushed oil sludge to separate the larger size impurities and particles. Since the screen mesh of the primary screening device 3 has a larger aperture, it can effectively remove the obvious large particle impurities. The vibration intensity is moderate to ensure the screening efficiency while reducing excessive agitation of the oil sludge. The equipment structure is solid and can withstand a larger material impact. It is easy to install and maintain, and the screen mesh can be replaced conveniently and quickly.

[0043] The heating coil 12 is installed on one side wall of the sand removal back flushing device 4, and the two ends of the heating coil 12 are connected with the gas-fired boiler 8, the adhesive substances in the oil sludge material are separated by heating the heating coil by steam, the oil sludge material after separation is back flushed to the primary screening device 3 by the back flushing booster pump 9, the oil water and fine particles in the material are sent to the secondary screening device 5, the sand removal efficiency is improved, the physical properties of the fluid can be changed, such as reducing the viscosity, so that the material particles are more easily separated; the back flushing system of the sand removal back flushing device 4 is reasonably designed to ensure the stable back flow of the liquid and does not affect the continuity of the overall process;

[0044] The secondary screening device 5 adopts a linear vibrating screen, which comprises a vibrating motor and a screen mesh, and the vibrating motor is connected with the screen mesh at the output end, so that the water and fine particles after sand removal treatment are subjected to more fine screening, and fine impurities and particles are separated, and the purity of the oil sludge is improved.

[0045] It is worth noting that the utility model discloses a crushing device, a primary screening device, a sand removal back flushing device and a secondary screening device are connected in sequence, the crushing device adopts a double-shaft shredder to improve the crushing efficiency, a recycling water system is connected on the primary screening device and the sand removal back flushing device, and no dust is generated in the screening process to cause secondary pollution, a heating coil is installed on one side wall in the sand removal back flushing device, the two ends of the heating coil are connected with a gas boiler through pipelines, a stirrer is installed in the sand removal back flushing device, the heating coil and the stirrer are heated by steam, the physical properties of fluid are changed, the adherent substances in the mechanically crushed oil sludge are separated, and fine particles in the separated materials are sent to the secondary screening device for fine screening, so that the screening effect on fine or strongly adherent impurities in the screening process is good.

[0046] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A pretreatment device for land-based oil sludge, characterized in that, include: The crushing device is a twin-shaft shredder used to crush large pieces of oily sludge material being conveyed. A primary screening device, comprising a cylindrical screening structure, wherein the discharge end of the crushing device is connected to the inlet end of the cylindrical screening structure, for screening the particle size of the crushed oil sludge material. The sand removal and backflushing device includes a heating plate unit installed on one side and a stirring device installed inside. The material inlet of the sand removal and backflushing device is connected to the liquid outlet of the cylindrical screening structure and the liquid inlet of the recycled water system. The discharge end of the sand removal and backflushing device is connected to the inlet of the primary screening device through a return pipe. A backflushing lift pump is installed on the return pipe to separate the adhesive substances in the oil sludge material by heating the heating plate unit and stirring by the stirring device. The separated oil sludge material is backflushed to the primary screening device through the backflushing lift pump for further screening of large particles of oil sludge material. The secondary screening device is a linear vibrating screen. The discharge end of the sand removal and backflushing device is also connected to the inlet end of the linear vibrating screen, which is used to send oil, water and fine particles in the material into the secondary screening device for fine screening.

2. The land-based sludge pretreatment device according to claim 1, characterized in that, It also includes a feeding device for conveying large pieces of oily sludge material, and the feed inlet of the twin-shaft shredder is connected to the discharge end of the feeding device.

3. The land-based sludge pretreatment device according to claim 1, characterized in that, The discharge port of the cylindrical screening structure is connected to the incineration equipment through a discharge pipe. A pump is installed on the discharge pipe to extract unqualified oil sludge material from the primary screening device for incineration.

4. The land-based sludge pretreatment device according to claim 1, characterized in that, The feed inlet of the cylindrical screening structure is connected to the liquid outlet of the recycled water system. The liquid inlet of the recycled water system is connected to a wastewater discharge system and a resource recovery device, which are used to rinse the oily sludge material on the inner wall of the primary screening device.

5. The land-based sludge pretreatment device according to claim 1, characterized in that, The heating plate unit is a heating coil tube, and the overall height of the heating coil tube is two-thirds of the height of the sand removal and backflushing device. A gap is left between the bottommost coil tube of the heating plate unit and the bottom of the sand removal and backflushing device.

6. The land-based sludge pretreatment device according to claim 5, characterized in that, The heating coil is connected to a gas boiler at both ends via pipes, and is used to heat the heating coil with steam.

7. The land-based sludge pretreatment device according to claim 1, characterized in that, The device also includes a resource recovery device, which comprises a two-stage conditioning structure and a centrifugal separation structure connected in sequence. The feed end of the two-stage conditioning structure is connected to the discharge end of the sand removal and backflushing device, and the discharge end of the two-stage conditioning structure is connected to the centrifugal separation structure, for obtaining finely screened oil sludge material particles.

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