High-efficiency elution treatment integrated device for oil field falling oil sludge

Abstract

The utility model belongs to the field of sludge treatment, and relates to a high-efficiency elution treatment integrated device for oil field falling oil sludge. Falling oil sludge in a feeding bin is conveyed into a homogeneous fluidization pool, homogeneous fluidization is carried out on the falling oil sludge in the homogeneous fluidization pool, formed slurry is input into an elution tank, residual oil and a mixture of a water phase and an oil phase are eluted through the elution tank, the residual oil enters a residual oil tank, the mixture of the water phase and the sludge phase is conveyed to solid-liquid separation equipment, and the solid-liquid separation equipment is used for separating the residual oil and the water phase and the oil phase. The water phase flows into the sewage tank through the solid-liquid separation equipment, and the mud phase falls onto a tailing belt conveyor arranged below the solid-liquid separation equipment.

Description

Technical Field

[0001] The utility model belongs to the field of sludge treatment and relates to an integrated device for efficient elution treatment of oil field ground sludge. Background Art

[0002] The oily sludge in the oil and gas field industry has the characteristics of "high solid content, low oil content and high hazard". In recent years, the treatment principles of "reduction, resource utilization and harmlessness" have been adopted for oily sludge. Commonly used and mature treatment technologies include solid-liquid mechanical separation, chemical water washing, pyrolysis, chemical oxidation, biological method, etc. The chemical water washing method has the advantages of fast speed, good effect and low cost, and has been widely used in major oil fields.

[0003] Chemical water washing is a method of repeatedly washing oily sludge with chemical solutions to separate oil from the solid surface. The mixed liquid after washing is separated into oil and water, and the tailings after washing are disposed of as resources. However, this technology also faces the following problems:

[0004] (1) Since the various oilfield sites are far apart and the areas where the fallen sludge is generated are numerous and scattered, it is expensive to build a separate water washing process line at each site. At the same time, there is a risk of sludge leakage and environmental pollution when transporting the scattered fallen sludge to the treatment site.

[0005] (2) The tailings after simple chemical water washing have a high water content and poor overall washing effect, which is not conducive to back-end harmless disposal. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide an integrated device for efficiently eluting and treating oil sludge dropped from oil fields.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] The utility model provides an integrated device for efficient elution and treatment of oilfield ground sludge, comprising a bottom skid, above which two rows of treatment devices are arranged side by side, wherein the first row of treatment devices comprises an incoming material bin, a homogenizing fluidized bed, and an elution tank, which are arranged in sequence from front to back, and the second row of treatment devices comprises a solid-liquid separation device, a sewage tank, and a residual oil tank, which are arranged in sequence from back to front;

[0009] The fallen oil sludge in the incoming material bin is transported to a homogenizing fluidizing tank, where the fallen oil sludge is homogenized and fluidized. The formed slurry is input into an elution tank, where the residual oil and a mixture of water phase and oil phase are eluted out. The residual oil enters the residual oil tank, and the mixture of water phase and mud phase is transported to a solid-liquid separation device. The water phase flows into a sewage tank through the solid-liquid separation device, and the mud phase falls onto a tailings belt conveyor provided below the solid-liquid separation device.

[0010] Furthermore, an incoming material belt conveyor is provided between the incoming material bin and the homogenizing fluidization tank.

[0011] Furthermore, a submersible slurry pump is connected between the homogenizing fluidizing tank and the elution tank via a first delivery pipeline, and the submersible slurry pump is installed at the bottom of the homogenizing fluidizing tank.

[0012] Furthermore, a horizontal slurry pump is connected between the elution tank and the solid-liquid separation equipment via a second delivery pipeline, and the horizontal slurry pump is installed outside the elution tank.

[0013] Furthermore, a stirring shaft is provided in the elution tank. When the residual oil and the water phase and mud phase mixture are eluted through the elution tank, the residual oil rises to the top layer and the water phase and mud phase mixture is in the lower layer.

[0014] Furthermore, the bottom skid is also provided with a dosing device for delivering medicine to the elution tank.

[0015] Furthermore, the dosing device includes a drug dispensing bin, a drug storage bin, a dosing pump, an electromagnetic flowmeter, a valve and a drug delivery pipeline. The dosing device is also provided with an automatic control system that can accurately control the amount of drug added.

[0016] Furthermore, the elution tank is also provided with an oil collecting device, which includes an oil collecting tank and an oil collecting funnel. The oil collecting funnel is connected to the residual oil tank through an oil collecting pipe. The oil collecting tank is arranged on the outer wall of the elution tank body, 100mm-200mm away from the tank top.

[0017] Furthermore, the solid-liquid separation equipment is a centrifuge.

[0018] Furthermore, the incoming material bin, residual oil tank and sewage tank are all made of carbon steel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The utility model adds a solid-liquid separation device at the end of the floor-standing oil sludge chemical water washing equipment, adopts combined technology to solve the problems of high water content and poor overall elution effect of tailings after simple chemical water washing from a technical and process perspective. At the same time, the equipment, pipelines, tanks and supporting facilities of the floor-standing oil sludge chemical water washing and solid-liquid separation processes are integrated into a skid-mounted structure, which not only improves the integrity of the equipment, but also saves site area, is convenient for transportation, installation and disassembly, and can be flexibly applied to various oil field oil sludge treatment sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are incorporated into and constitute a part of this specification and, together with the description, are used to explain the principles of the present invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the integrated device for efficient elution and treatment of oilfield ground sludge in the utility model.

[0024] Among them: 1 is the bottom skid; 2 is the incoming material bin; 3 is the homogenizing fluidized bed; 4 is the elution tank; 5 is the solid-liquid separation equipment; 6 is the sewage tank; 7 is the residue oil tank; 8 is the dosing device; 9 is the incoming material belt conveyor; 10 is the submersible slurry pump; 11 is the horizontal slurry pump; 12 is the agitator; 13 is the water inlet; 14 is the oil collection tank; 15 is the oil collection funnel; 16 is the agitator shaft; 17 is the foundation of the solid-liquid separation equipment; 18 is the tailings belt conveyor; 19 is the dosing pump; 20 is the bracket; 21 is the automatic control system. DETAILED DESCRIPTION

[0025] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples of devices consistent with some aspects of the present invention as detailed in the appended claims.

[0026] Example

[0027] like Figure 1 As shown, an integrated device for efficient elution and treatment of oilfield ground sludge includes a bottom skid 1, above which two rows of treatment devices are arranged side by side. The first row of treatment devices includes, from front to back, an incoming material bin 2, a homogenizing fluidized bed 3, and an elution tank 4. The second row of treatment devices includes, from back to front, a solid-liquid separation device 5, a sewage tank 6, and a residual oil tank 7.

[0028] The fallen oil sludge in the incoming material bin 2 is transported to the homogenizing fluidizing tank 3, where the fallen oil sludge is homogenized and fluidized. The formed slurry is input into the elution tank 4, where the residual oil and the water phase and oil phase mixture are eluted out. The residual oil enters the residual oil tank 7, and the water phase and mud phase mixture is transported to the solid-liquid separation equipment 5. The water phase flows into the sewage tank 6 through the solid-liquid separation equipment 5, and the mud phase falls onto the tailings belt conveyor 18 provided below the solid-liquid separation equipment 5, and the tailings belt conveyor 18 is supported by the bracket 20.

[0029] In this embodiment: the utility model consists of an incoming material bin 2, a homogenizing fluidized bed 3, an elution tank 4, a solid-liquid separation device 5, an incoming material belt conveyor 9, a tailings belt conveyor 1818, a sewage tank 6, a residue oil tank 7, a dosing device 8, an automatic control system 2121, a bottom skid 1, a submersible slurry pump 10, a horizontal slurry pump 11 and other supporting facilities.

[0030] The tailings belt conveyor 18 is used to transport the tailings after solid-liquid separation and transport the tailings to a fixed storage place. The tailings belt conveyor 18 has an operating power of 1.5kw, a belt width of 0.5m, a skirt, an anti-deviation function, and a conveying capacity of 5t / h.

[0031] Furthermore, an incoming material belt conveyor 9 is provided between the incoming material bin 2 and the homogenizing fluidized bed 3 .

[0032] In this embodiment: the incoming material bin 2 is used to store the fallen oil sludge, which is convenient for stable and continuous operation of the rear end. The incoming material bin 2 is made of carbon steel anti-corrosion material with a wall thickness of 8 mm.

[0033] The incoming belt conveyor 9 is used to transport the oily sludge that falls to the ground in the silo 2 to the homogenizing fluidized bed 3. The incoming belt conveyor 9 has an operating power of 1.5 kW, a belt width of 0.5 m, a skirt, an anti-deviation function, and a conveying capacity of 5 t / h. The purpose is to improve the fluidity of the sludge and facilitate pump transportation.

[0034] The homogenous fluidized bed 3 is used for falling oil, with the purpose of improving its mud fluidity and facilitating mud homogenization by the pump body, improving the fluidity of the falling oil mud and facilitating pump transportation. The falling oil mud enters the homogenous fluidized bed 3 and is stirred by adding water to form a slurry. The liquid content of the slurry is adjusted and controlled to be 60% and the solid content is 40%. The homogenous fluidized bed 3 is made of carbon steel anti-corrosion material with a wall thickness of 8mm. Two agitators 12 are arranged on the upper part. The power of each agitator 12 is 1.1kw. The length of the agitator shaft 16 is 4 / 5 of the height of the homogenous fluidized bed 3. The agitator shaft 16 is made of carbon steel anti-corrosion. The stirring speed is 50-60n / min. The blades are detachably installed to facilitate flexible adjustment and control of the stirring range. The homogenous fluidized bed 3 is provided with a water inlet 13 and an agitator 12.

[0035] Furthermore, a submersible slurry pump 10 is connected between the homogenizing fluidizing tank 3 and the elution tank 4 via a pipeline, and the submersible slurry pump 10 is installed at the bottom of the homogenizing fluidizing tank 3;

[0036] In this embodiment, the submersible slurry pump 10 is used to input the slurry after homogenization and fluidization into the elution tank 4. The submersible slurry pump 10 is installed at the bottom of the homogenization fluidization tank 3, with a power of 7.5kw, two 0.75kW agitators 12, and a flow rate of 10m 3 / h, lift 10-15m, the pump body impeller is made of wear-resistant and corrosion-resistant material.

[0037] Furthermore, a horizontal slurry pump 11 is connected between the elution tank 4 and the solid-liquid separation device 5 via a delivery pipeline, and the horizontal slurry pump 11 is installed outside the elution tank 4 .

[0038] In this embodiment: the elution tank 4 is used for eluting oil sludge, repeatedly washing the oily sludge to separate the oil from the solid surface; by adding water and chemical agents, the stirring shaft 16 is used to fully stir, and after standing, the oil, water and solid layers are separated, wherein the eluted residual oil rises to the top layer, and the water phase and the mud phase are in the lower layer. After standing and stratifying for 2 hours, the residual oil enters the residual oil tank 7 for storage and utilization through the oil collection device to achieve the purpose of resource utilization, and the lower water phase and mud phase are transported to the solid-liquid separation equipment 5 by the horizontal slurry pump 11.

[0039] The chemical agent used is a surfactant-type sludge cleaning agent. Its main mechanism is that the agent material has a large specific surface area and strong interfacial activity. It will be adsorbed on the oil-water interface to form an interfacial film, playing a surfactant-like role, thereby reducing the oil-water interfacial tension, thereby peeling and falling off the oil from the solid phase.

[0040] The elution process is controlled by the following technical parameters: 3-5% addition amount of sludge cleaning agent, 0.5-1h stirring time, 5:1 liquid-solid ratio, and 2h standing time for stratification.

[0041] Furthermore, a stirring shaft 16 is provided in the elution tank 4 .

[0042] In this embodiment: the stirring shaft 16 is installed along the length direction of the elution tank 4, 500 mm away from the bottom of the tank, and adopts a spiral push-type stirring device, which can realize tumbling and stirring of the material in the tank, greatly ensuring the stirring and separation effect, good stirring uniformity, stirring power 11kw, and the shaft body is made of anti-corrosion material.

[0043] Furthermore, the bottom skid 1 is also provided with a dosing device 8 for delivering medicine to the elution tank 4 .

[0044] Furthermore, the dosing device 8 includes a drug dispensing bin, a drug storage bin, a dosing pump 19, an electromagnetic flowmeter, a valve and a drug delivery pipeline. The dosing device 8 is also provided with an automatic control system 21 that can accurately control the amount of drug added.

[0045] In this embodiment: the dosing device 8 is mainly used to configure and store medicines and deliver medicines to the elution tank 4. It includes a medicine dispensing warehouse, medicine storage, a dosing pump 19, an electromagnetic flowmeter, valves and pipelines. The dosing amount is accurately and efficiently controlled through the automatic control system 21.

[0046] The automatic control system 21 mainly consists of a PLC control unit, a pipeline unit, etc., and is used to control the pump body of the entire integrated equipment, the start and stop of the equipment, etc.

[0047] An integrated device for efficient elution treatment of oilfield ground sludge consists of an incoming material bin 2, a homogenizing fluidized bed 3, an elution tank 4, a solid-liquid separation device 5, an incoming material belt conveyor 9, a tailings belt conveyor 18, a sewage tank 6, a residue oil tank 7, a dosing device 8, an automatic control system 21, a bottom skid 1 structure, a pump body and other supporting facilities. By adding a solid-liquid separation device at the end of the ground sludge chemical water washing equipment, the combined technology is used to solve the problem of high water content and poor overall elution effect of tailings after simple chemical water washing from a technical and process perspective. At the same time, the equipment, pipelines, tanks and supporting facilities of the ground sludge chemical water washing treatment and solid-liquid separation process are integrated into a skid-mounted structure, which not only improves the integrity of the equipment, but also saves site area. At the same time, it is convenient for transportation, installation and disassembly, and can be flexibly applied to various oilfield sludge treatment sites.

[0048] Furthermore, the elution tank 4 is also provided with an oil collecting device, which includes an oil collecting tank 14, an oil collecting funnel 15 and an oil collecting pipeline. The oil collecting tank 14 is arranged on the outer wall of the elution tank 4, 100mm-200mm away from the tank top.

[0049] In this embodiment, the oil collecting device includes an oil collecting tank 14, an oil collecting funnel 15 and a pipeline. The oil collecting tank 14 is arranged on the outer wall of the elution tank 4, 100-200 mm away from the tank top, and the bottom height of the oil collecting tank 14 is 50 mm lower than the lowest surface of the upper residual oil layer in the elution tank 4; a 1%-2% slope is set in the oil collecting tank 14, sloping towards the oil collecting funnel 15; the oil collecting funnel 15 is fixed at the lowest point of the oil collecting tank 14, so that the residual oil can flow smoothly through the pipeline to the residual oil tank 7.

[0050] The oil collecting tank 14 is provided with a movable joint at the connection with the outer plate of the elution tank 4. The movable joint is composed of a holder, a slot and a block. The height of the bottom of the oil collecting tank 14 can be flexibly adjusted according to the thickness of the oil layer. When the height of the oil collecting tank 14 needs to be adjusted, the block is pulled open and the oil collecting tank 14 is moved up and down in the slot. After confirmation, the block is closed to complete the position adjustment of the oil collecting tank 14.

[0051] Furthermore, the solid-liquid separation equipment 5 is a centrifuge.

[0052] In this embodiment, the solid-liquid separation equipment 5 is used to re-separate the solid and liquid phases of the eluted material, enhancing the solid-liquid separation effect, further reducing the moisture content of the eluted material, improving the elution effect, and meeting the requirements for subsequent harmless disposal. The solid-liquid separation equipment 5 uses a conventional commercial centrifuge with a drum diameter of 1600 mm and an effective volume of 900 L. A horizontal slurry pump 11 conveys the eluted aqueous and mud phase mixture to the feed inlet of the solid-liquid separation equipment 5. After solid-liquid separation, the aqueous phase flows through a pipeline to a wastewater tank 6 for storage, while the solid phase falls to a tailings belt conveyor 18 located below the solid-liquid separation equipment 5. The solid-liquid separation equipment is supported by a solid-liquid separation equipment foundation 17.

[0053] Furthermore, the incoming material bin 2, the residual oil tank 7, and the sewage tank 6 are all made of carbon steel.

[0054] In this embodiment, the sewage tank 6 is used to store separated sewage and is made of carbon steel anti-corrosion material with a wall thickness of 8 mm.

[0055] The residual oil tank 7 is used to store the residual oil after washing the fallen oil sludge, which can achieve the purpose of resource recovery. It is made of carbon steel anti-corrosion material with a wall thickness of 8mm.

[0056] The incoming material bin 2 is used to store the fallen oil sludge, which is convenient for stable and continuous operation of the rear end. The incoming material bin is made of carbon steel anti-corrosion material with a wall thickness of 8mm.

[0057] Working principle: the material (fallen sludge) first enters the incoming silo 2 for storage, and is then transferred to the homogenizing fluidizing tank 3 via the incoming belt conveyor 9. In the homogenizing fluidizing tank 3, the fallen sludge is homogenized and fluidized by clean water or sewage in the system sewage tank 6; the homogenized and fluidized material is transported to the elution tank 4 via the submersible slurry pump 10, and the elution agent is added to the elution tank 4 and fully stirred, so that the oil in the elution tank 4 is peeled off from the solid phase. After standing, the oil, water, and mud (solid phase) are separated into three phases, and the upper dirty oil falls into the residual oil tank 7 through the oil collecting tank and the funnel, and the lower water and mud are transported to the solid-liquid separation device 5 (i.e., centrifuge) through the horizontal slurry pump 11 in a stirred state. After centrifugation, the solid phase falls to the tailings belt conveyor 18 and is transported to the designated area for storage, and the liquid phase enters the sewage tank 6 through the pipeline (pressurized at the centrifuge outlet).

[0058] The above description is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0059] It should be understood that the present invention is not limited to the above description and that various modifications and changes can be made without departing from the scope of the present invention. The scope of the present invention is limited only by the appended claims.

Claims

1. An integrated device for efficient elution and treatment of oilfield sludge, comprising a bottom skid (1), characterized in that: A first row of processing devices and a second row of processing devices are arranged side by side above the bottom skid (1), wherein the first row of processing devices comprises an incoming material bin (2), a homogenizing fluidized bed (3), and an elution tank (4) arranged in sequence from front to back, and the second row of processing devices comprises a solid-liquid separation device (5), a sewage tank (6), and a residual oil tank (7) arranged in sequence from back to front; The fallen oil sludge in the incoming material bin (2) is transported to a homogenizing fluidization tank (3), where the fallen oil sludge is homogenized and fluidized. The formed slurry is input into an elution tank (4), where the residual oil and a mixture of a water phase and an oil phase are eluted out. The residual oil enters a residual oil tank (7), and the mixture of a water phase and a sludge phase is transported to a solid-liquid separation device (5). The water phase flows into a sewage tank (6) through the solid-liquid separation device (5), and the sludge phase falls onto a tailings belt conveyor (18) provided below the solid-liquid separation device (5).

2. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: An incoming material belt conveyor (9) is provided between the incoming material bin (2) and the homogenizing fluidization tank (3).

3. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: A submersible slurry pump (10) is connected between the homogenizing fluidizing tank (3) and the elution tank (4) via a first delivery pipeline, and the submersible slurry pump (10) is installed at the bottom of the homogenizing fluidizing tank (3).

4. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: A horizontal slurry pump (11) is connected between the elution tank (4) and the solid-liquid separation device (5) via a second delivery pipeline, and the horizontal slurry pump (11) is installed outside the elution tank (4).

5. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: A stirring shaft (16) is provided in the elution tank (4).

6. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: The bottom skid (1) is also provided with a dosing device (8) for delivering medicine to the elution tank (4), and the elution tank (4) and the dosing device (8) are connected via a medicine delivery pipeline.

7. The integrated device for efficient elution and treatment of oilfield sludge according to claim 6 is characterized in that: The dosing device (8) further comprises a drug dispensing bin, a drug storage bin, a drug dosing pump (19), an electromagnetic flow meter, and a valve. The dosing device (8) is also provided with an automatic control system (21) capable of accurately controlling the amount of drug added.

8. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: The elution tank (4) is also provided with an oil collecting device, which includes an oil collecting tank (14) and an oil collecting funnel (15). The oil collecting funnel (15) is connected to the residual oil tank (7) through an oil collecting pipeline. The oil collecting tank (14) is provided on the outer wall of the tank body of the elution tank (4) and is 100 mm to 200 mm away from the tank top.

9. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1 is characterized in that: The solid-liquid separation equipment (5) is a centrifuge.

10. The integrated device for efficient elution and treatment of oilfield sludge according to claim 1, characterized in that: The incoming material bin (2), the residual oil tank (7) and the sewage tank (6) are all made of carbon steel.

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