Anti-blocking oil-water-cement three-phase separation horizontal screw machine

Abstract

The utility model belongs to the field of object separation, particularly relates to an anti-blocking oil-water-cement three-phase separation horizontal screw machine, and aims to solve the problems that a water phase outlet is blocked, and frequent faults and high maintenance cost are caused due to the fact that the whole oil-water-cement three-phase separation horizontal screw machine needs to be disassembled, assembled and cleaned in the prior art. According to the utility model, an arc-shaped rib plate is arranged between two adjacent reinforcing ribs on the inner wall of a rotary drum and is close to a water phase outlet; a mud stirring claw is mounted on the outer circumferential surface, close to the water phase outlet, of the spiral conveying shaft. The arc-shaped rib plate can increase the mud storage amount, improve the height of the baffle and prevent dry mud from overflowing to the water phase outlet too early, the mud stirring claw continuously stirs materials near the water phase outlet, large-particle solid matter is prevented from being deposited, water flow is kept smooth, and disassembly and cleaning are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of object separation, and specifically relates to a clog-resistant horizontal screw press for three-phase separation of oil and cement. Background Technology

[0002] The process flow of the three-phase oil-cement horizontal screw press is as follows: the bottom sludge from the crude oil tanks in the storage and transportation workshop and the slag-containing sludge from the coking unit first enter the settling tank for preliminary solid-liquid separation. After this initial solid-liquid separation, the bottom sludge enters the three-phase horizontal screw press for oil-cement separation. The separated oil is mixed with the crude oil and sent to the distillation workshop for reprocessing, the water enters the wastewater treatment plant for treatment and reuse as circulating water, and the dried sludge is treated by a professional hazardous waste treatment company for environmental protection.

[0003] The unit's actual operating performance is very poor. After less than two days of continuous operation, the aqueous phase outlet becomes clogged with dry sludge, preventing oil-water separation. Due to its structural characteristics, the current technical solution is to disassemble and clean the entire unit, dismantling each flow component and performing high-pressure cleaning. After cleaning, the unit is reassembled. However, the unit is installed on a high platform, requiring cranes and high-pressure cleaning equipment for disassembly and cleaning, resulting in high maintenance costs. Furthermore, cleaning is required an average of twice a week, significantly impacting the unit's operation.

[0004] Analysis revealed that the frequent blockage of the aqueous phase in the three-phase horizontal screw press was caused by the unstable composition of the feed sludge and significant fluctuations in the solid-liquid ratio. Under a fixed differential speed, when the feed solid phase was high, a large amount of dry sludge was produced during separation, which could not be promptly scraped away by the screw and overflowed into the aqueous phase outlet. In the initial stages of operation, operators needed to frequently observe the discharge from each outlet to adjust the unit speed and the differential speed between the inner and outer rotors, but precise control remained difficult, leading to frequent blockages.

[0005] Based on this, this utility model proposes a clog-resistant horizontal screw press for three-phase separation of oil and cement. Utility Model Content

[0006] To address the aforementioned problems in existing technologies, namely that three-phase horizontal screw presses cannot effectively separate excessive solid phases due to unstable feed sludge composition and large variations in solid-liquid ratios at a fixed differential speed, leading to dry sludge overflow and blockage of the aqueous phase outlet, and that existing solutions require complete disassembly and cleaning, resulting in frequent malfunctions and high maintenance costs, this invention provides an anti-clogging oil-cement three-phase separation horizontal screw press, comprising a screw conveyor shaft and a rotating drum sleeved outside the screw conveyor shaft. An arc-shaped reinforcing plate is installed on the inner wall of the rotating drum between two adjacent reinforcing ribs, near the aqueous phase outlet.

[0007] A mud-stirring claw is installed on the outer circumferential surface of the spiral conveyor shaft near the aqueous phase outlet.

[0008] In some preferred embodiments, the center of the arc-shaped rib coincides with the center of the rotating cylinder.

[0009] In some preferred embodiments, the stiffeners are welded to the inner surface of the rotating drum.

[0010] In some preferred embodiments, the mud-stirring claws are symmetrically arranged along the axis of the spiral conveyor shaft.

[0011] In some preferred embodiments, the mud-stirring claw includes a first section, a second section, and a third section;

[0012] One end of the first segment is fixed to the outer circumferential surface of the screw conveyor shaft, the other end of the first segment is fixed perpendicularly to one end of the second segment, and the other end of the second segment is fixed perpendicularly to one end of the third segment;

[0013] A separation disk is provided between the first segment and the third segment.

[0014] In some preferred embodiments, the first segment is fixed to the connecting block, and the connecting block is fixed to the outer circumferential surface of the screw conveyor shaft.

[0015] In some preferred embodiments, the cross-sectional area of ​​the connecting block is greater than the cross-sectional area of ​​the first segment.

[0016] The beneficial effects of this utility model are:

[0017] A 5*5mm thick arc-shaped rib is welded around the inner wall of the rotating drum closest to the aqueous phase outlet. This increases the amount of mud stored and raises the height of the baffle, preventing dry mud from overflowing into the aqueous phase outlet prematurely.

[0018] Two pairs of mud-stirring claws are installed on the outer circumference of the screw conveyor shaft near the aqueous phase outlet. These mud-stirring claws are cut and welded from 3mm thick 316L stainless steel plates and are designed to rotate with the screw to prevent dry mud accumulation and ensure smooth and unobstructed flow at the aqueous phase outlet.

[0019] The stiffening plates increase internal storage space, allowing more solid materials to be temporarily held until they can be effectively removed via the screw conveyor shaft.

[0020] The function of the mud agitator is to continuously agitate the material near the aqueous phase outlet, prevent the deposition of large solid particles, maintain smooth water flow, and help disperse smaller solid particles in the water for subsequent processing. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the rib plate in a three-phase horizontal screw press for anti-clogging oil-cement separation according to this utility model;

[0023] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0024] Figure 3 This is a schematic diagram of the agitator claw in a three-phase horizontal screw press for anti-clogging oil-cement separation according to this utility model;

[0025] Figure 4 yes Figure 3 A magnified view of a portion of the image. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figures 1-4 As shown, see Figure 1 and Figure 3 This utility model provides an anti-clogging oil-cement three-phase separation horizontal screw press, which is a modification based on the Z4E-3 / 441 three-phase horizontal screw press produced by the German company Flöwe. The specific structure of the Z4E-3 / 441 three-phase horizontal screw press is existing technology and will not be described in detail here. This utility model only describes the modified parts. The specific modified parts are the screw conveyor shaft 1 and the rotating drum 2 sleeved on the screw conveyor shaft 1. An arc-shaped rib plate 4 is installed between two adjacent reinforcing ribs 3 on the inner wall of the rotating drum 2 and near the water phase outlet.

[0029] A mud-stirring claw 5 is installed on the outer circumferential surface of the screw conveyor shaft 1 near the water phase outlet.

[0030] Installation of mud-stirring claw 5:

[0031] On the outer circumferential surface of the screw conveyor shaft 1 near the water phase outlet, two pairs of mud-stirring claws 5 are designed and welded. Each pair of mud-stirring claws 5 is evenly distributed to ensure that they can effectively prevent dry mud from accumulating at the outlet when moving with the screw conveyor shaft 1.

[0032] The stirring claw 5 is cut from a 3mm thick 316L stainless steel plate and is fixed to the screw conveyor shaft 1 by precision welding to ensure structural strength and corrosion resistance. The design of the stirring claw 5 needs to take into account the principles of fluid mechanics to ensure that it can stir the material near the aqueous phase outlet during rotation without causing additional resistance or wear.

[0033] See Figure 1 and Figure 2 Installation of stiffener 4:

[0034] At the location closest to the aqueous phase outlet on the inner wall of the rotating drum, i.e., between two adjacent reinforcing ribs 3, a 5*5mm thick arc-shaped rib plate is welded. The function of this rib plate 4 is to increase the height of the mud phase baffle, allowing more solid materials to be temporarily contained inside the rotating drum until they can be effectively removed by the screw conveyor shaft 1.

[0035] The material selection for stiffener 4 should take into account corrosion resistance and mechanical strength. It is usually made of the same material as the rotating drum 2, such as stainless steel, to ensure a long service life.

[0036] In this embodiment, the center of the arc-shaped rib 4 coincides with the center of the rotating cylinder 2. The rib 4 is welded to the inner surface of the rotating cylinder 2.

[0037] When the center of stiffener 4 coincides with the center of the rotating drum 2, it ensures that the centrifugal force and other stresses acting on stiffener 4 are evenly distributed inside the drum during rotation. This helps reduce material fatigue or deformation caused by stress concentration. Maintaining concentricity between components is crucial for high-speed rotating equipment. If stiffener 4 and rotating drum 2 are not concentric, it may lead to rotational imbalance, generating vibration and noise, affecting the equipment's performance and lifespan.

[0038] The coincidence of the centers ensures a smoother and more regular flow path for liquid and solid materials within the rotating drum 2, which is beneficial for improving the separation effect of the three phases of oil, water, and mud. It avoids fluid turbulence caused by misalignment, thereby improving separation efficiency.

[0039] During installation, using the center of the rotating drum 2 as a reference point to position the stiffening plate 4 makes the installation process simpler and more intuitive. Precise marking and positioning ensure that each stiffening plate is accurately placed in its designed position.

[0040] During subsequent inspections and maintenance, maintaining center alignment makes it easier for technicians to assess the equipment's condition and make necessary adjustments or replacements. Standardized installation methods also reduce the risk of errors.

[0041] Concentric mounting reduces unnecessary friction between rotating parts, especially the relative movement between the screw conveyor shaft 1 and the rotating drum 2. This not only extends the service life of the equipment but also reduces the likelihood of failures due to wear.

[0042] In this embodiment, the stirring claws 5 are symmetrically arranged along the axis of the spiral conveyor shaft 1. This ensures that the forces generated during rotation are evenly distributed, thereby maintaining the dynamic balance of the entire device. This helps reduce vibration and noise, and extends the service life of the equipment.

[0043] See Figure 3 and Figure 4 The mud-stirring claw 5 includes a first section 51, a second section 52, and a third section 53;

[0044] One end of the first segment 51 is fixed to the outer circumferential surface of the screw conveyor shaft 1, the other end of the first segment 51 is fixed perpendicularly to one end of the second segment 52, and the other end of the second segment 52 is fixed perpendicularly to one end of the third segment 53.

[0045] A separation disk 6 is provided between the first segment 51 and the third segment 53.

[0046] The first segment 51 is fixed to the connecting block 54, and the connecting block 54 is fixed to the outer circumferential surface of the screw conveyor shaft 1.

[0047] The cross-sectional area of ​​the connecting block 54 is greater than the cross-sectional area of ​​the first segment 51.

[0048] The design of the first section 51, the second section 52, and the third section 53 of this utility model allows the stirring claws to have different angles and lengths, enabling adjustments to the stirring effect according to the material characteristics and improving work efficiency. Simultaneously, the vertically fixed structure increases the strength of the stirring claws, allowing them to better cope with complex working environments.

[0049] The separation disc 6, located between the first section 51 and the third section 53, acts as a barrier or guide during the operation of the agitator claw, preventing excessive material accumulation or entanglement on the agitator claw and thus affecting its normal operation. Furthermore, it also serves as a reinforcing component, enhancing the overall rigidity of the agitator claw 5. The separation disc 6 between the first section 51 and the third section 53 of the agitator claw 5 further agitates the material near the aqueous phase outlet during rotation. This continuous agitation prevents dry mud from accumulating at the outlet, ensuring unobstructed flow at the aqueous phase outlet.

[0050] In addition to the modifications mentioned above, this utility model can also reduce the height of the water phase overflow baffle and cut the baffle diameter from 300mm to 290mm using a lathe, thereby increasing the outlet area. This provides sufficient space for the modification of installing the mud-stirring claw 5.

[0051] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0054] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An anti-clogging oil cement three-phase separation horizontal screw machine, comprising a screw conveying shaft (1) and a rotating drum (2) sleeved outside the screw conveying shaft (1), characterized in that, An arc-shaped rib plate (4) is installed between two adjacent reinforcing ribs (3) on the inner wall of the rotating drum (2) and close to the water phase outlet. A mud stirring claw (5) is installed on the outer circumferential surface of the spiral conveying shaft (1) close to the water phase outlet. The mud stirring claw (5) comprises a first section (51), a second section (52) and a third section (53). One end of the first section (51) is fixed to the outer circumferential surface of the spiral conveying shaft (1), the other end of the first section (51) is fixed perpendicularly to one end of the second section (52), the other end of the second section (52) is fixed perpendicularly to one end of the third section (53). A separation disc (6) is arranged between the first section (51) and the third section (53).

2. An anti-clogging oil cement three-phase separation horizontal screw machine according to claim 1, characterized in that, The center of the arc-shaped rib plate (4) coincides with the center of the rotating drum (2).

3. The anti-clogging oil cement three-phase separation horizontal screw machine according to claim 1, characterized in that, The rib plate (4) is welded on the inner surface of the rotating drum (2).

4. The anti-clogging oil cement three-phase separation horizontal screw machine according to claim 1, characterized in that, The mud stirring claw (5) is symmetrically arranged along the axis of the spiral conveying shaft (1).

5. An anti-clogging oil cement three-phase decanter according to claim 1, characterized in that, The first section (51) is fixed to a connecting block (54), and the connecting block (54) is fixed to the outer circumferential surface of the spiral conveying shaft (1).

6. An anti-clogging oil cement three-phase decanter according to claim 5, characterized in that, The cross-sectional area of the connecting block (54) is larger than that of the first section (51).

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