A kind of oilfield sludge pretreatment device

Abstract

The invention discloses an oilfield sludge pretreatment device, and relates to the technical field of oilfield sludge pretreatment devices, specifically an oilfield sludge pretreatment device, comprising an outer metal layer and a buffer mechanism, wherein a waterproof vacuum barrier is arranged inside the outer metal layer, and an inner metal layer is arranged inside the waterproof vacuum barrier, and a stirring rod is arranged inside the inner metal layer, and stirring paddles are welded on both sides of the outer wall of the stirring rod. The oilfield sludge pretreatment device is provided with internal heating to maintain local temperature, prevent heat loss, achieve melting and decomposition within a controllable range, and has fast heating speed and high efficiency; it is suitable for stirring oil, mud and water in a sludge pool evenly under the condition that the ambient temperature is lower than the freezing point of crude oil, and has a large output torque, achieving the goals of energy saving and safety, and can achieve multi-directional and multi-angle operation.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield waste oil sludge pretreatment device, in particular to an oilfield waste oil sludge pretreatment device. Background Art

[0002] The existing treatment method of oilfield waste sludge is usually to extract it through a mud pump and then conduct subsequent treatment, that is, to directly extract the oilfield waste sludge by using the large flow and large suction of the mud pump. This method of direct extraction by a mud pump has defects. Since most of the oilfield waste sludge is in a solidified state, the composition is relatively complex, there are many impurities, and the components are clearly stratified. Its viscosity is high and its fluidity is poor. The efficiency of direct extraction by a mud pump is relatively low, and the failure rate of the mud pump is high when it is working under harsh conditions.

[0003] In addition, when oilfield sludge is directly extracted, a large amount of residual oilfield sludge remains. In order to ensure that environmental protection requirements are met, the residual oilfield sludge needs to be extracted multiple times, which greatly reduces the efficiency of oilfield sludge treatment and greatly increases the cost of oilfield sludge treatment. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an oilfield sludge pretreatment device, which solves the problems of low extraction efficiency and high oilfield sludge treatment cost caused by the oilfield sludge in the prior art being in a solidified state, with a relatively complex composition, more impurities, higher viscosity and poor fluidity.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an oilfield sludge pretreatment device, comprising an outer metal layer and a buffer mechanism, a waterproof vacuum barrier is arranged inside the outer metal layer, and an inner metal layer is arranged inside the waterproof vacuum barrier, a stirring rod is arranged inside the inner metal layer, and stirring paddles are welded on the left and right sides of the outer wall of the stirring rod, a lower cross bracket is installed at the bottom of the waterproof vacuum barrier, and a grid cross blade cutter is arranged inside the lower cross bracket, and locking mechanisms are installed on both sides of the outer wall of the grid cross blade cutter, the buffer mechanism is located below the lower cross bracket, an upper heat insulation layer is installed above the waterproof vacuum barrier, and one side of the upper heat insulation layer penetrates A steam inlet is passed through, a mixed slurry outlet is passed through the other side of the upper insulation layer, a steam connecting pipeline is installed above the stirring rod, and a mixed slurry connecting pipeline is installed above the steam connecting pipeline, a suspension frame is installed above the middle of the upper insulation layer, and a reducer is arranged inside the suspension frame, an explosion-proof variable frequency motor is connected above the reducer, a gravity boom is connected above the suspension frame, and a forward telescopic cylinder is connected to one side of the gravity boom, a tilt control cylinder is hinged on one side of the forward telescopic cylinder, and a main fixed large platform is hinged at the bottom of the tilt control cylinder, left and right telescopic cylinders are hinged at the front and rear ends of the bottom of the forward telescopic cylinder, and an upper exhaust port is arranged inside the upper insulation layer.

[0006] Optionally, the central axes of the waterproof vacuum insulation layer, the outer metal layer and the inner metal layer coincide with each other, and the outer metal layer is wrapped around the outside of the waterproof vacuum insulation layer, and the waterproof vacuum insulation layer is wrapped around the outside of the inner metal layer.

[0007] Optionally, the suspension frame and the gravity boom are bound together, and the gravity boom and the forward telescopic cylinder are pinned together.

[0008] Optionally, the steam inlet passes through the interior of the upper heat insulation layer, and the upper heat insulation layer is perpendicular to the steam inlet, and the steam inlet is communicated with the steam connecting pipeline.

[0009] Optionally, the mixed slurry outlet passes through the interior of the upper heat insulation layer, and the mixed slurry outlet is perpendicular to the upper heat insulation layer, and the mixed slurry outlet is communicated with the mixed slurry connecting pipeline.

[0010] Optionally, the lower cross bracket forms a detachable structure with the grid cross blade cutter through a locking mechanism, and the exterior of the grid cross blade cutter is a grid-like structure.

[0011] Optionally, the buffer mechanism includes a bottom ring frame, a limiting slot, a buffer spring, a connecting screw and a bottom plate, the bottom of the bottom ring frame is provided with a limiting slot, and a buffer spring is provided inside the limiting slot, a connecting screw passes through the inside of the buffer spring, and the bottom plate is connected to the connecting screw.

[0012] Optionally, the bottom ring frame forms an elastic structure with the bottom plate through buffer springs and connecting screws, and the inner wall width of the limiting slot is equal to the distance between the outer wall and the inner wall of the bottom plate, and the buffer springs and connecting screws are evenly distributed along the outside of the bottom plate.

[0013] Optionally, the locking mechanism includes a fixing frame, a return spring, a latch and a socket, the fixing frame is provided with a return spring inside, the return spring runs through the latch inside, and a socket is provided on a side of the latch away from the grid cross blade cutter.

[0014] Optionally, the fixing frame forms an elastic structure through a return spring and a latch, and the latch runs through the inside of the socket, and the fixing frame, the return spring and the latch are evenly distributed along the outside of the grid cross blade cutter.

[0015] The present invention provides an oilfield sludge pretreatment device, which has the following beneficial effects:

[0016] The beneficial effects of the present invention are that the heat insulation bin is heated internally, the local temperature is maintained, the heat loss is prevented, the melting and decomposition is achieved within a controllable range, the heating speed is fast and the efficiency is high; it is suitable for stirring the oil, mud and water in the waste oil sludge pool evenly under the condition that the ambient temperature is lower than the freezing point of crude oil, and the output torque is large, the goals of energy saving and safety are achieved, and multi-directional and multi-angle operation can be achieved; the oil, mud and water can be mixed evenly from the waste oil sludge pool, and the local oil field waste oil sludge is heat exchanged by high-temperature steam to increase the fluidity of the oil field waste oil sludge;

[0017] 1. The oilfield sludge pretreatment device is provided with a waterproof vacuum barrier, an outer metal layer and an inner metal layer. The waterproof vacuum barrier can effectively delay the diffusion of temperature and effectively avoid the leakage of sewage, thereby effectively providing a high waterproof effect for the device. The waterproof vacuum barrier, the outer metal layer and the inner metal layer are light in weight and have large buoyancy, which are balanced with the gravity of structures such as explosion-proof variable frequency motors, reducers and stirring rods.

[0018] 2. The oilfield sludge pretreatment device is equipped with a grid cross blade cutter, which can effectively cut the incoming sludge, and the incoming sludge can rely on its own gravity to cut branches, fibers, block polymer clusters, and large mud lumps to prevent subsequent entanglement.

[0019] 3. The oilfield sludge pretreatment device is provided with a locking mechanism, and the return spring can effectively push the pin to move along the central axis direction of the fixed frame until the pin is inserted into the inside of the socket, and the grid cross-blade cutter can be effectively connected to the inner metal layer through the pin, thereby effectively limiting the position between the grid cross-blade cutter and the inner metal layer, and effectively improving the convenience of disassembling and assembling the grid cross-blade cutter and the inner metal layer.

[0020] 4. The oilfield sludge pretreatment device is provided with an upper insulation layer, which can effectively block the diffusion of high-temperature gas, effectively maintain the temperature inside the inner metal layer, prevent heat loss, and achieve melting and decomposition within a controllable range. The heating speed is fast and the efficiency is high. The uniform distribution of the steam connecting pipeline can effectively increase the steam outlet area, thereby effectively increasing the steam diffusion effect, and effectively ensuring the rapid increase of the temperature inside the inner metal layer, and realizing the rapid fusion of materials. A mixed slurry connecting pipeline is provided, and the mixed slurry connecting pipeline can effectively achieve local heating and local extraction of oilfield sludge, and the outer wall of the mixed slurry connecting pipeline is provided with evenly distributed holes, which can effectively increase the contact area between the material and the mixed slurry connecting pipeline, thereby effectively improving the efficiency of local extraction of oilfield sludge.

[0021] 5. The oilfield sludge pretreatment device is provided with a buffer mechanism. When the bottom plate is hit, the bottom plate compresses the buffer spring along the central axis direction of the limiting slot. The buffer spring can effectively provide effective buffering for the bottom plate, and the uniform distribution of the buffer spring can effectively share the collision force of the bottom plate, and can effectively provide effective buffering protection for the bottom ring frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the waterproof vacuum insulation layer of the present invention;

[0024] Figure 3 Schematic diagram of the distribution structure of the upper exhaust port of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the mixed slurry connecting pipeline and the steam connecting pipeline of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the grid cross-knife cutter of the present invention;

[0027] Figure 6 It is a schematic diagram of the vertical state structure of the forward telescopic oil cylinder of the present invention;

[0028] Figure 7 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0029] Figure 8 For the present invention Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0030] In the figure: 1. Waterproof vacuum insulation layer; 2. Outer metal layer; 3. Inner metal layer; 4. Suspension frame; 5. Explosion-proof variable frequency motor; 6. Reducer; 7. Stirring rod; 8. Stirring paddle; 9. Steam inlet; 10. Mixed slurry outlet; 11. Upper insulation layer; 12. Lower cross bracket; 13. Upper exhaust port; 14. Mixed slurry connecting pipe; 15. Steam connecting pipe; 16. Grid cross knife cutter; 17. Gravity boom; 18. Forward telescopic cylinder; 19. Tilt control cylinder; 20. Main fixed large platform; 21. Buffer mechanism; 2101. Bottom ring frame; 2102. Limiting slot; 2103. Buffer spring; 2104. Connecting screw; 2105. Bottom plate; 22. Locking mechanism; 2201. Fixed frame; 2202. Return spring; 2203. Latch; 2204. Socket; 23. Left and right telescopic cylinders. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figures 1 to 8The present invention provides a technical solution: an oilfield sludge pretreatment device, comprising an outer metal layer 2 and a buffer mechanism 21, a waterproof vacuum barrier 1 is arranged inside the outer metal layer 2, and an inner metal layer 3 is arranged inside the waterproof vacuum barrier 1, the central axes of the waterproof vacuum barrier 1, the outer metal layer 2 and the inner metal layer 3 coincide with each other, and the outer metal layer 2 is wrapped around the outside of the waterproof vacuum barrier 1, and the waterproof vacuum barrier 1 is wrapped around the outside of the inner metal layer 3, the waterproof vacuum barrier 1 can effectively delay the diffusion of temperature, and can effectively avoid the leakage of sewage, so as to effectively provide a high waterproof effect for the device, and the waterproof vacuum barrier 1, the outer metal layer 2 and the inner metal layer 3 are light in weight and have large buoyancy, and are balanced with the gravity of the explosion-proof variable frequency motor 5, the reducer 6 and the stirring rod 7;

[0035] A stirring rod 7 is arranged inside the inner metal layer 3, and stirring paddles 8 are welded on the left and right sides of the outer wall of the stirring rod 7. A lower cross bracket 12 is installed at the bottom of the waterproof vacuum barrier 1, and a grid cross blade cutter 16 is arranged inside the lower cross bracket 12. Locking mechanisms 22 are installed on both sides of the outer wall of the grid cross blade cutter 16. The lower cross bracket 12 forms a detachable structure with the grid cross blade cutter 16 through the locking mechanism 22, and the outside of the grid cross blade cutter 16 is a grid-like structure. The grid cross blade cutter 16 can effectively cut the incoming oil sludge, and the incoming oil sludge can cut branches, fibers, block polymer groups, and large mud lumps by its own gravity to prevent subsequent entanglement;

[0036] The locking mechanism 22 includes a fixing frame 2201, a return spring 2202, a latch 2203 and a socket 2204. The fixing frame 2201 is provided with a return spring 2202, and the inside of the return spring 2202 runs through the latch 2203, and the socket 2204 is provided on the side of the latch 2203 away from the grid cross blade cutter 16. The fixing frame 2201 forms an elastic structure with the latch 2203 through the return spring 2202, and the latch 2203 runs through the inside of the socket 2204, and the fixing frame 2201, the return spring 2202 and the latch 2203 form an elastic structure. 3 are evenly distributed along the outside of the grid cross blade cutter 16. Under the action of the return spring 2202, the latch 2203 can be effectively pushed to move along the central axis direction of the fixing frame 2201 until the latch 2203 penetrates into the inside of the insertion hole 2204, and the grid cross blade cutter 16 can be effectively connected to the inner metal layer 3 through the latch 2203, so as to effectively limit the position between the grid cross blade cutter 16 and the inner metal layer 3, and effectively improve the convenience of disassembling and assembling the grid cross blade cutter 16 and the inner metal layer 3;

[0037] The buffer mechanism 21 is located below the lower cross bracket 12, and an upper insulation layer 11 is installed above the waterproof vacuum barrier 1, and a steam inlet 9 is penetrated on one side of the upper insulation layer 11, and the steam inlet 9 penetrates the interior of the upper insulation layer 11, and the upper insulation layer 11 is perpendicular to the steam inlet 9, and the steam inlet 9 is connected to the steam connecting pipe 15. The upper insulation layer 11 can effectively block the diffusion of high-temperature gas, effectively maintain the temperature inside the inner metal layer 3, prevent heat loss, achieve melting and decomposition within a controllable range, and heat quickly and efficiently. The uniform distribution of the steam connecting pipe 15 can effectively increase the steam outlet area, thereby effectively increasing the steam diffusion effect, and effectively maintaining In order to ensure that the temperature inside the inner metal layer 3 is rapidly increased and the material is rapidly fused, a mixed slurry outlet 10 is penetrated on the other side of the upper insulation layer 11, a steam connecting pipe 15 is installed above the stirring rod 7, and a mixed slurry connecting pipe 14 is installed above the steam connecting pipe 15, the mixed slurry outlet 10 penetrates the interior of the upper insulation layer 11, and the mixed slurry outlet 10 is perpendicular to the upper insulation layer 11, and the mixed slurry outlet 10 is connected to the mixed slurry connecting pipe 14, the mixed slurry connecting pipe 14 can effectively realize the local heating and local extraction of the oilfield waste sludge, and the outer wall of the mixed slurry connecting pipe 14 is provided with evenly distributed holes, which can effectively increase the contact area between the material and the mixed slurry connecting pipe 14, Thereby, the efficiency of local extraction of oil sludge in oil fields can be effectively improved. A suspension frame 4 is installed above the middle of the upper insulation layer 11, and a reducer 6 is arranged inside the suspension frame 4. An explosion-proof variable frequency motor 5 is connected above the reducer 6. A gravity suspension rod 17 is connected above the suspension frame 4, and a forward telescopic cylinder 18 is connected to one side of the gravity suspension rod 17. The suspension frame 4 and the gravity suspension rod 17 are bound, and the gravity suspension rod 17 and the forward telescopic cylinder 18 are pinned. A tilt control cylinder 19 is hinged on one side of the forward telescopic cylinder 18, and a main fixed large platform 20 is hinged on the bottom of the tilt control cylinder 19. The front and rear ends of the bottom of the forward telescopic cylinder 18 are hinged with left and right telescopic cylinders 23. The buffer mechanism 21 includes a bottom ring frame 2101 , limiting slot 2102, buffer spring 2103, connecting screw 2104 and bottom plate 2105. The bottom of the bottom ring frame 2101 is provided with a limiting slot 2102, and the inside of the limiting slot 2102 is provided with a buffer spring 2103, the inside of the buffer spring 2103 is penetrated by the connecting screw 2104, and the bottom of the connecting screw 2104 is connected to the bottom plate 2105. The bottom ring frame 2101 forms an elastic structure with the bottom plate 2105 through the buffer spring 2103 and the connecting screw 2104, and the inner wall width of the limiting slot 2102 is equal to the distance between the outer wall and the inner wall of the bottom plate 2105, and the buffer spring 2103 and the connecting screw 2104 are evenly distributed along the outside of the bottom plate 2105. The bottom plate 2105 is hit.The bottom plate 2105 compresses the buffer spring 2103 along the central axis direction of the limiting slot 2102, and the buffer spring 2103 can effectively provide effective buffering for the bottom plate 2105, and the uniform distribution of the buffer spring 2103 can effectively share the collision force of the bottom plate 2105, and can effectively provide effective buffering protection for the bottom ring frame 2101. The upper exhaust port 13 is arranged inside the upper insulation layer 11.

[0038] In summary, when the oilfield sludge pretreatment device is used, first, the grid cross blade cutter 16 is placed at the bottom of the lower cross bracket 12, and then the return spring 2202 is used to push the latch 2203 to move along the central axis of the fixing frame 2201 until the latch 2203 is inserted into the inside of the plug hole 2204, and the grid cross blade cutter 16 is connected to the inner metal layer 3 through the latch 2203, so that the position between the grid cross blade cutter 16 and the inner metal layer 3 can be effectively limited;

[0039] Secondly, steam is introduced into the steam connecting pipe 15 through the steam inlet 9, and then steam is introduced into the inner metal layer 3 through the steam connecting pipe 15, so that the oilfield sludge can be quickly melted, and the mixed slurry outlet 10 applies an extraction force to the mixed slurry connecting pipe 14, so that the mixed slurry connecting pipe 14 can achieve local heating and local extraction of the oilfield sludge, and then, the explosion-proof variable frequency motor 5 and the reducer 6 are started in sequence, so that the stirring rod 7 drives the sludge to rotate through the stirring paddle 8, and then the incoming sludge can cut branches, fibers, block polymer groups, and large mud lumps by its own gravity to prevent subsequent entanglement;

[0040] Finally, the forward telescopic cylinder 18 is started, so that the forward telescopic cylinder 18 applies a pushing force to the suspension frame 4 through the gravity hanger 17, which can effectively change the moving distance of the device, and the left and right telescopic cylinders 23 are started. The left and right telescopic cylinders 23 can effectively push the forward telescopic cylinder 18 to rotate, thereby effectively changing the rotation angle of the device and adjusting the device to a suitable position. Then, the device is placed in a suitable position. At this time, the bottom plate 2105 is collided, so that the bottom plate 2105 compresses the buffer spring 2103 along the central axis direction of the limiting slot 2102, and the buffer spring 2103 can effectively provide effective buffering for the bottom plate 2105.

[0041] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oilfield sludge pretreatment device, comprising an outer metal layer (2) and a buffer mechanism (21), characterized in that: A waterproof vacuum barrier (1) is arranged inside the outer metal layer (2), and an inner metal layer (3) is arranged inside the waterproof vacuum barrier (1); a stirring rod (7) is arranged inside the inner metal layer (3), and stirring paddles (8) are welded to the left and right sides of the outer wall of the stirring rod (7); a lower cross bracket (12) is installed at the bottom of the waterproof vacuum barrier (1), and a grid cross blade cutter (16) is arranged inside the lower cross bracket (12); locking mechanisms (22) are installed on both sides of the outer wall of the grid cross blade cutter (16); the buffer mechanism (21) is located below the lower cross bracket (12); an upper heat insulation layer (11) is installed above the waterproof vacuum barrier (1), and a steam inlet (9) is penetrated on one side of the upper heat insulation layer (11), and a mixed slurry outlet (10) is penetrated on the other side of the upper heat insulation layer (11) A steam connecting pipe (15) is installed above the stirring rod (7), and a mixed slurry connecting pipe (14) is installed above the steam connecting pipe (15); a suspension frame (4) is installed above the middle of the upper heat insulation layer (11), and a reducer (6) is arranged inside the suspension frame (4); an explosion-proof variable frequency motor (5) is connected above the reducer (6); a gravity suspension rod (17) is connected above the suspension frame (4), and a forward telescopic oil cylinder (18) is connected to one side of the gravity suspension rod (17); a tilt control oil cylinder (19) is hinged to one side of the forward telescopic oil cylinder (18), and a main fixed large platform (20) is hinged to the bottom of the tilt control oil cylinder (19); left and right telescopic oil cylinders (23) are hinged to the front and rear ends of the bottom of the forward telescopic oil cylinder (18); and an upper exhaust port (13) is arranged inside the upper heat insulation layer (11); The buffer mechanism (21) comprises a bottom ring frame (2101), a limiting slot (2102), a buffer spring (2103), a connecting screw (2104) and a bottom plate (2105); the bottom of the bottom ring frame (2101) is provided with a limiting slot (2102), and the inside of the limiting slot (2102) is provided with a buffer spring (2103); the inside of the buffer spring (2103) is penetrated by a connecting screw (2104), and the bottom of the connecting screw (2104) is connected to the bottom plate (2105); The bottom ring frame (2101) forms an elastic structure with the bottom plate (2105) through the buffer spring (2103) and the connecting screw (2104), and the inner wall width of the limiting slot hole (2102) is equal to the distance between the outer wall and the inner wall of the bottom plate (2105), and the buffer spring (2103) and the connecting screw (2104) are evenly distributed along the outside of the bottom plate (2105); The locking mechanism (22) comprises a fixing frame (2201), a return spring (2202), a latch (2203) and an insertion hole (2204); the fixing frame (2201) is provided with a return spring (2202) inside, the return spring (2202) penetrates the latch (2203) inside, and the insertion hole (2204) is provided on a side of the latch (2203) away from the grid cross blade cutter (16); The fixing frame (2201) forms an elastic structure through the return spring (2202) and the latch (2203), and the latch (2203) penetrates the interior of the insertion hole (2204), and the fixing frame (2201), the return spring (2202) and the latch (2203) are evenly distributed along the exterior of the grid cross blade cutter (16).

2. The oilfield sludge pretreatment device according to claim 1 is characterized by: The central axes of the waterproof vacuum insulation layer (1), the outer metal layer (2) and the inner metal layer (3) coincide with each other, and the outer metal layer (2) is wrapped around the outside of the waterproof vacuum insulation layer (1), and the waterproof vacuum insulation layer (1) is wrapped around the outside of the inner metal layer (3).

3. The oilfield sludge pretreatment device according to claim 1 is characterized by: The suspension frame (4) and the gravity suspension rod (17) are bound together, and the gravity suspension rod (17) and the forward telescopic oil cylinder (18) are pin-connected.

4. The oilfield sludge pretreatment device according to claim 1 is characterized by: The steam inlet (9) penetrates the interior of the upper heat insulation layer (11), the upper heat insulation layer (11) is perpendicular to the steam inlet (9), and the steam inlet (9) is connected to the steam connecting pipeline (15).

5. The oilfield sludge pretreatment device according to claim 1 is characterized by: The mixed slurry outlet (10) penetrates the interior of the upper heat insulation layer (11), and the mixed slurry outlet (10) is perpendicular to the upper heat insulation layer (11), and the mixed slurry outlet (10) is connected to the mixed slurry communication pipeline (14).

6. The oilfield sludge pretreatment device according to claim 1 is characterized by: The lower cross bracket (12) forms a detachable structure with the grid cross blade cutter (16) through a locking mechanism (22), and the exterior of the grid cross blade cutter (16) is in a grid-like structure.

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