A skid-mounted oil sludge reduction treatment device

Abstract

The utility model belongs to oil sludge treatment technical field, concretely relates to a pry -on type oil sludge reduction treatment device, including pretreatment pry (1), the pretreatment pry (1) includes the water diversion settlement tank (11) for diluting sludge, the vibration screen (12) for removing big granule in sludge, the sorting filter tank (13) for stirring layering oil water cement, the first feeding conveying screw rod pump (14) for sending oil base cement slurry in sorting filter tank (13) to subsequent processing device, the water diversion settlement tank (11) is equipped with the sludge feeding rotor pump for lifting sludge to the vibration screen, the vibration screen (12) sets up on sorting filter tank (13), separates pry (3) and includes the three -phase centrifuge (31) that can receive oil base cement slurry that second feeding conveying screw rod pump (22) delivery, and oil base cement slurry carries out three -phase separation, the sludge after processing has no secondary increment, realizes the oil sludge reduction truly, fundamentally helps to solve the oil sludge pollution problem.

Description

Technical Field

[0001] This utility model belongs to the field of oil sludge treatment technology, specifically relating to a skid-mounted oil sludge reduction treatment device. Background Technology

[0002] Oil sludge is a complex mixture generated during oil extraction, refining, storage, and transportation. It can exist in solid, semi-solid, or liquid states, and is primarily composed of oil, water, and solid particles. The solid particles include colloids, asphaltene, clay, sand, impurities, and metals. The specific sources of oil sludge encompass various processes such as dredging of oilfield containers, drilling operations, oil and water well maintenance, infrastructure construction, and leak cleanup of production (storage) facilities.

[0003] Existing methods for treating oil sludge typically involve direct stockpiling or disposal, which has the following drawbacks: 1) It occupies a large amount of land resources, leading to a decrease in land utilization, especially in oil fields and surrounding areas where land resources are scarce; 2) Pollutants such as oil and heavy metals in the oil sludge can easily seep into the soil, causing damage to soil structure and a decline in soil fertility. Moreover, the pollution is persistent and cumulative, making it difficult to remediate naturally; 3) Due to rainwater runoff, pollutants in the oil sludge can enter surface water or groundwater systems, leading to eutrophication and water quality deterioration, threatening drinking water safety and the balance of aquatic ecosystems; 4) During the stockpiling process, volatile oils and harmful gases can easily evaporate into the air, causing air pollution and potentially generating odors that affect the living environment of surrounding residents.

[0004] In conclusion, the improper disposal of oil sludge has posed a serious threat to the ecological environment and hindered the sustainable development of the petroleum industry. Therefore, developing a separation technology that can achieve the harmless treatment and resource utilization of oil sludge is of great practical significance for reducing environmental pollution, improving resource utilization, ensuring environmental safety, and promoting the sustainable development of the industry.

[0005] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a skid-mounted sludge reduction treatment device to solve the problems existing in the current sludge treatment.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides a skid-mounted sludge reduction treatment device, comprising:

[0009] The pretreatment skid includes a settling tank for diluting sludge, a vibrating screen for removing large particles from the sludge, a sorting and filtration tank for mixing and separating oil-based cement, and a first feeding screw pump for sending the oil-based cement slurry in the sorting and filtration tank to the subsequent treatment unit; the settling tank is equipped with an oil sludge feeding rotor pump for lifting the sludge to the vibrating screen, and the vibrating screen is set on the sorting and filtration tank.

[0010] The slurry skid includes a slurry mixing tank capable of receiving oil-based cement slurry delivered by a first feeding screw pump and capable of heating the oil-based cement slurry, and a second feeding screw pump for sending the mixed oil-based cement slurry to a subsequent processing device.

[0011] The separation skid includes a three-phase centrifuge capable of receiving oil-based cement slurry delivered by a second feeding screw pump and performing three-phase separation of the oil-based cement slurry. The three-phase centrifuge is connected to a buffer water tank, a buffer oil tank, and a screw conveyor for outputting finished sludge.

[0012] Specifically, the water-diverting sedimentation tank is equipped with a first high-pressure flushing centrifugal pump for agitating the sediment at its bottom.

[0013] Specifically, the top of the sorting and filtration tank is equipped with an agitator for stirring the oil and cement at the bottom, and the top of the sorting and filtration tank is also equipped with an oil float collector for collecting the separated crude oil.

[0014] Specifically, the vibrating screen is also equipped with a second high-pressure flushing centrifugal pump for removing large particles of mud and sand.

[0015] Specifically, the vibrating screen includes an electric vibrating screen and a manual vibrating screen.

[0016] Specifically, the top of the slurry mixing tank is equipped with a second agitator for mixing oil-based cement slurry.

[0017] Specifically, the slurry skid also includes an electric thermal oil furnace and a thermal oil circulation pump connected to the electric thermal oil furnace. The inner wall of the slurry mixing tank is provided with a thermal oil coil, which is connected to the thermal oil circulation pump.

[0018] Furthermore, the inlet of the heat transfer oil coil is located at the bottom of the slurry mixing tank, and the outlet is located at the top of the slurry mixing tank. The heat transfer oil circulation pump is connected to the inlet of the heat transfer oil coil, and the outlet of the heat transfer oil coil is connected to the electric heat transfer oil furnace.

[0019] Specifically, the slurry skid also includes a dosing device for adding chemicals to the slurry mixing tank, and a dosing metering pump is provided between the dosing device and the slurry mixing tank.

[0020] Specifically, it also includes a water storage tank and an oil storage tank. A centrifugal pump and an oil delivery screw pump are installed inside the separation skid. The buffer water tank is connected to the water storage tank through the centrifugal pump, and the buffer oil tank is connected to the oil storage tank through the oil delivery screw pump.

[0021] The water storage tank is connected to the water intake sedimentation tank, the first high-pressure flushing centrifugal pump, the second high-pressure flushing centrifugal pump, and the slurry mixing tank.

[0022] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0023] This utility model's skid-mounted sludge reduction treatment device has a significant effect on treating sludge containing complex components such as sludge, water, and solid particles generated during various operations and facilities in oilfields, as detailed below:

[0024] 1) Excellent processing efficiency, capable of reducing the water content of separated crude oil to below 10%, effectively realizing the recovery of oilfield resources, and providing an environmentally friendly and economical comprehensive solution for the treatment of oily sludge in the petroleum industry;

[0025] 2) The process is simple, the equipment selection is flexible, the footprint is small, and the integrated skid-mounted design is simple in structure, easy to transport and install, and suitable for diverse oilfield operation scenarios.

[0026] 3) No additional heat source is required; it can operate at room temperature and consumes only electricity and a suitable amount of water (the amount of which is adjusted according to the moisture content of the raw materials), thus reducing energy consumption and operating costs.

[0027] 4) The production process produces no secondary pollution and does not cause pollution transfer. The treated oil and water can be returned to the original system without causing adverse effects. The treated sludge does not increase in volume, truly achieving oil sludge reduction, fundamentally helping to solve the oil sludge pollution problem, ensuring environmental safety, and promoting the sustainable development of the petroleum industry. Attached Figure Description

[0028] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the pretreatment skid of this utility model;

[0031] Figure 2 This is a schematic diagram of the structure of the pulping skid of this utility model;

[0032] Figure 3 This is a schematic diagram of the separation skid of this utility model;

[0033] Figure 4 This is a schematic diagram illustrating the processing principle of this utility model.

[0034] Wherein: 1 is a pretreatment skid; 11 is a water inlet settling tank; 12 is a vibrating screen; 13 is a sorting and filtration tank; 131 is a first agitator; 14 is a first feeding and conveying screw pump;

[0035] 2 is a slurry skid; 21 is a slurry mixing tank; 211 is a second agitator; 22 is a second feeding and conveying screw pump; 23 is an electric thermal oil furnace; 24 is a thermal oil circulation pump; 25 is a dosing device;

[0036] 3 is the separation skid; 31 is the three-phase centrifuge; 32 is the buffer water tank; 33 is the buffer oil tank; 34 is the centrifugal pump; 35 is the oil delivery screw pump; 36 is the screw conveyor. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. The embodiments described below do not represent all embodiments consistent with this invention. Rather, they are merely examples consistent with some aspects of this invention as detailed in the appended claims.

[0038] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0039] See Figure 1-3 As shown, this embodiment provides a skid-mounted sludge reduction treatment device, including:

[0040] The pretreatment skid 1 includes a water-priming settling tank 11 for diluting sludge, a vibrating screen 12 for removing large particles from the sludge, a sorting and filtration tank 13 for mixing and separating oil-based cement slurry, and a first feeding screw pump 14 for sending the oil-based cement slurry in the sorting and filtration tank 13 to the subsequent treatment device; the water-priming settling tank 11 is equipped with an oil sludge feeding rotor pump for lifting sludge to the vibrating screen, and the vibrating screen 12 is installed on the sorting and filtration tank 13.

[0041] The slurry skid 2 includes a slurry mixing tank 21 that can receive oil-based cement slurry delivered by the first feeding screw pump 14 and heat the oil-based cement slurry, and a second feeding screw pump 22 that is used to send the mixed oil-based cement slurry to the subsequent processing device.

[0042] The separation skid 3 includes a three-phase centrifuge 31 that can receive oil-based cement slurry delivered by the second feeding screw pump 21 and perform three-phase separation of the oil-based cement slurry. The three-phase centrifuge 31 is connected to a buffer water tank 32, a buffer oil tank 33 and a screw conveyor 36 for outputting finished mud.

[0043] Specifically, the water-diverting sedimentation tank 11 is equipped with a first high-pressure flushing centrifugal pump for agitating the sediment at its bottom.

[0044] Specifically, the top of the sorting and filtration tank 13 is provided with an agitator 131 for stirring the oil and cement at the bottom, and the top of the sorting and filtration tank 13 is also provided with an oil float collector for collecting the separated crude oil.

[0045] Specifically, the vibrating screen 12 is also equipped with a second high-pressure flushing centrifugal pump for removing large particles of mud and sand.

[0046] Specifically, the vibrating screen 12 includes an electric vibrating screen and a manual screen.

[0047] Specifically, the top of the slurry mixing tank 21 is provided with a second agitator 211 for mixing oil-based cement slurry.

[0048] Specifically, the slurry skid 2 also includes an electric thermal oil furnace 23 and a thermal oil circulation pump 24 connected to the electric thermal oil furnace 23. The inner wall of the slurry mixing tank 21 is provided with a thermal oil coil, which is connected to the thermal oil circulation pump 24.

[0049] Furthermore, the inlet of the heat transfer oil coil is located at the bottom of the slurry mixing tank 21, and the outlet is located at the top of the slurry mixing tank 21. The heat transfer oil circulation pump 24 is connected to the inlet of the heat transfer oil coil, and the outlet of the heat transfer oil coil is connected to the electric heat transfer oil furnace 23.

[0050] Specifically, the slurry skid 2 also includes a dosing device 25 for adding chemicals to the slurry mixing tank 21, and a dosing metering pump is provided between the dosing device 25 and the slurry mixing tank 21.

[0051] Specifically, it also includes a water tank and an oil tank. A centrifugal pump 34 and an oil delivery screw pump 35 are installed inside the separation skid 3. The buffer water tank 32 is connected to the water tank through the centrifugal pump 34, and the buffer oil tank 33 is connected to the oil tank through the oil delivery screw pump 35.

[0052] The water storage tank is connected to the water intake sedimentation tank 11, the first high-pressure flushing centrifugal pump, the second high-pressure flushing centrifugal pump, and the slurry mixing tank 21.

[0053] See Figure 4 As shown in the figure, this embodiment provides an operation method for a skid-mounted sludge reduction treatment device, as detailed below:

[0054] First, transport the pretreatment skid, slurry skid, and separation skid to the sludge treatment site, connect the relevant pipelines between them, and then carry out subsequent processing;

[0055] 1. Pretreatment skid

[0056] Feeding: Add the sludge to be treated to the settling tank 11, add water and stir, and then use the oil sludge feeding rotor pump to lift the sewage oil sludge (at room temperature) to the vibrating screen 12; when feeding is difficult, use the first high pressure flushing centrifugal pump to stir the mud and sand at the bottom of the settling tank 11 with high pressure water.

[0057] Sorting: Based on the impurities in the oily sludge, an electric vibrating screen sorting system is selected, and a second high-pressure flushing centrifugal pump is used to remove solid particles larger than 3mm from the oily sludge. The sorting and filtration tank 13 is equipped with a first agitator 131 and an oil float collector. The first agitator 131 stirs the material in the sorting and filtration tank 13 for 15 to 30 minutes, and the oil and mud separate into layers. The oil float collector collects the crude oil on the surface of the liquid in the sorting and filtration tank 13 and transports it to the oil storage tank. The bottom oily sludge is lifted to the slurry mixing tank 21 by the first feeding screw pump.

[0058] 2. Pulping skid

[0059] The slurry skid 2 is equipped with two slurry mixing tanks 21. Each slurry mixing tank 21 heats the oil-based cement slurry with heat transfer oil and is stirred by a second agitator 211. The heating and stirring time is 1 hour, and the heating temperature is controlled at 45~60℃. The oil-based cement slurry is stirred until the oil and cement separate into layers in the slurry mixing tank 21, and then lifted to the separation skid 3 by the second feeding screw pump 22. The heating is carried out by the electric heat transfer oil furnace 23, which provides 100℃ hot oil through the heat transfer oil circulation pump 24 to the heat transfer oil coil to heat the oil-based cement slurry in the slurry mixing tank 21. According to the separation of the oil-based cement slurry and the test results, the dosing device 25 adds demulsifiers, flocculants, coagulants and other agents to the slurry mixing tank 21 through the dosing metering pump.

[0060] 3) Separation skid

[0061] Under the action of the three-phase centrifuge 31, the oil-based cement slurry utilizes the principle that the three phases have different specific gravities and therefore experience different centrifugal forces. The separated water enters the buffer water tank 32 and is pumped into the storage tank by the centrifugal pump 34, while the excess water is transported away. The separated crude oil flows into the buffer oil tank 33 and is pumped into the storage tank by the oil delivery screw pump 35. Once the storage tank is full, the crude oil is transported away. The separated finished sludge is pushed out of the three-phase centrifuge 31 by the screw conveyor 36 and transported away.

[0062] It should also be noted that the water collected in the storage tank can be recycled and reused, and sent to the water settling tank 11, the first high-pressure flushing centrifugal pump, the second high-pressure flushing centrifugal pump, and the slurry mixing tank 21 respectively, so as to improve the water utilization rate.

[0063] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily 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 this utility model.

[0064] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A skid-mounted sludge reduction treatment device, characterized in that, include: The pretreatment skid (1) includes a water-priming settling tank (11) for diluting sludge, a vibrating screen (12) for removing large particles from the sludge, a sorting and filtration tank (13) for mixing and separating oil-based cement, and a first feeding screw pump (14) for sending the oil-based cement slurry in the sorting and filtration tank (13) to the subsequent treatment device; the water-priming settling tank (11) is equipped with an oil sludge feeding rotor pump for lifting the sludge to the vibrating screen, and the vibrating screen (12) is set on the sorting and filtration tank (13); The slurry skid (2) includes a slurry mixing tank (21) capable of receiving oil-based cement slurry from a first feeding screw pump (14) and capable of heating the oil-based cement slurry, and a second feeding screw pump (22) for sending the mixed oil-based cement slurry to a subsequent processing device. The separation skid (3) includes a three-phase centrifuge (31) that can receive oil-based cement slurry conveyed by a second feeding screw pump (22) and perform three-phase separation of the oil-based cement slurry. The three-phase centrifuge (31) is connected to a buffer water tank (32), a buffer oil tank (33), and a screw conveyor (36) for outputting finished mud.

2. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The water-diverting sedimentation tank (11) is equipped with a first high-pressure flushing centrifugal pump for agitating the sediment at its bottom.

3. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The top of the sorting and filtration tank (13) is provided with a stirrer (131) for stirring the oil cement at the bottom, and the top of the sorting and filtration tank (13) is also provided with a floating oil collector for collecting the separated crude oil.

4. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The vibrating screen (12) is also equipped with a second high-pressure flushing centrifugal pump for removing large particles of mud and sand.

5. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The vibrating screen (12) includes an electric vibrating screen and a manual screen.

6. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The top of the slurry mixing tank (21) is provided with a second agitator (211) for mixing oil-based cement slurry.

7. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The slurry skid (2) also includes an electric thermal oil furnace (23) and a thermal oil circulation pump (24) connected to the electric thermal oil furnace (23). The inner wall of the slurry mixing tank (21) is provided with a thermal oil coil, which is connected to the thermal oil circulation pump (24).

8. The skid-mounted sludge reduction treatment device according to claim 7, characterized in that, The inlet of the heat transfer oil coil is located at the bottom of the slurry mixing tank (21), and the outlet is located at the top of the slurry mixing tank (21). The heat transfer oil circulation pump (24) is connected to the inlet of the heat transfer oil coil, and the outlet of the heat transfer oil coil is connected to the electric heat transfer oil furnace (23).

9. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, The slurry skid (2) also includes a dosing device (25) for adding chemicals to the slurry mixing tank (21), and a dosing metering pump is provided between the dosing device (25) and the slurry mixing tank (21).

10. The skid-mounted sludge reduction treatment device according to claim 1, characterized in that, It also includes a water tank and an oil tank. The separation skid (3) is equipped with a centrifugal pump (34) and an oil delivery screw pump (35). The buffer water tank (32) is connected to the water tank through the centrifugal pump (34), and the buffer oil tank (33) is connected to the oil tank through the oil delivery screw pump (35).

Images