A feed device for oil-based drilling debris pyrolysis kiln

Abstract

The utility model discloses a kind of feeding devices for oil-based rock debris pyrolysis kiln, it is related to the technical field of feeding, including filter hopper and screw conveyor, the screw conveyor includes conveying shell, auger conveying component and rotary tube, the auger conveying component is rotatably installed in conveying shell, the conveying end of conveying shell is rotatably connected rotary tube, the rotary tube is connected the feed pipe of pyrolysis kiln with one end away from conveying shell, the top of conveying shell is provided with feed pipe, the bottom of filter hopper is connected feed pipe by feed hose, the filter hopper has reciprocating linear movement freedom along horizontal direction, filter plate is provided in the filter hopper, by the double action design of "filter hopper horizontal reciprocating motion+vertical vibration", fundamentally solve the problem that oil-based rock debris filters low efficiency, filter plate is easy to block.

Description

Technical Field

[0001] This utility model relates to the field of feeding technology, specifically a feeding device for an oil-based rock cuttings pyrolysis kiln. Background Technology

[0002] In oil and gas drilling operations, oil-based drilling fluids are often used to ensure drilling efficiency and wellbore stability, which generates a large amount of oil-based rock cuttings. These solid wastes contain pollutants such as crude oil, mineral oil, and heavy metals. Direct discharge of these materials would seriously pollute the soil, water, and atmosphere. Furthermore, the oil components in these materials have recycling value, so they need to be treated harmlessly and recycled through specialized processes.

[0003] Currently, pyrolysis technology has become the mainstream process for treating oil-based rock cuttings due to its ability to efficiently separate oil from the rock and ensure that solid residues meet emission standards. The stability of the feeding process in the pyrolysis kiln, as the core equipment, directly determines the pyrolysis efficiency: excessive fluctuations in the feed rate can disrupt the temperature field within the kiln, leading to incomplete or excessive cracking of the oil; if impurities enter the kiln, they can easily wear down the kiln lining, clog the discharge port, and even cause equipment failure. However, existing oil-based rock cuttings pyrolysis kiln feeding devices often lack or have inefficient filtration functions: oil-based rock cuttings often contain impurities such as metal fragments and large rock blocks from the drilling process. Traditional feeding devices (such as simple screw conveyors) lack filtration structures, allowing impurities to directly enter the pyrolysis kiln, which not only exacerbates equipment wear but also affects the uniformity of the pyrolysis reaction and reduces the oil recovery rate; some devices with filters use fixed filter plates, but due to the adhesive nature of oil-based rock cuttings, the filtration efficiency is low, thus affecting the feeding efficiency of the pyrolysis kiln. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a feeding device for an oil-based rock cuttings pyrolysis kiln to address the deficiencies of the prior art.

[0005] The purpose of this utility model is achieved through the following technical solution: a feeding device for an oil-based rock cuttings pyrolysis kiln, comprising a filter bucket and a screw conveyor, wherein the screw conveyor comprises a conveying shell, an auger conveying assembly and a rotating pipe, the auger conveying assembly is rotatably installed inside the conveying shell, the conveying end of the conveying shell is rotatably connected to the rotating pipe, the end of the rotating pipe away from the conveying shell is connected to the feed pipe of the pyrolysis kiln, the top of the conveying shell is provided with a feed pipe, the bottom of the filter bucket is connected to the feed pipe through a feed hose, the filter bucket has a reciprocating linear movement degree of freedom in the horizontal direction, and a filter plate is provided inside the filter bucket.

[0006] Furthermore, a drive plate is provided on the side wall of the filter bucket, and the bottom of the drive plate is slidably mounted on the conveying housing. A drive assembly is provided on the conveying housing, and the drive assembly is used to drive the drive plate to perform reciprocating linear motion.

[0007] Furthermore, a strip-shaped groove is provided on the top of the conveying housing, a horizontal guide rod is fixed in the strip-shaped groove, a guide slider is slidably sleeved on the horizontal guide rod, the guide slider is fixed to the bottom of the drive plate, and a first spring is sleeved on the horizontal guide rod, with the two ends of the first spring respectively connected to the guide slider and the conveying housing.

[0008] Furthermore, the drive assembly includes a motor and a cam, the motor being mounted on the conveyor housing, the cam being mounted on the output shaft of the motor, and the cam contacting the drive plate.

[0009] Furthermore, a vertical groove is provided on the side of the drive plate near the filter bucket, a vertical guide rod is fixed in the vertical groove, a vibration slider is slidably sleeved on the vertical guide rod, the vibration slider is fixedly connected to the filter bucket, and a second spring is sleeved on the vertical guide rod, with the two ends of the second spring respectively connected to the vibration slider and the drive plate.

[0010] Furthermore, the top flange of the filter bucket is connected to an upper flexible hose, and the end of the upper flexible hose away from the filter bucket is connected to a rigid pipe, and the end of the rigid pipe away from the upper flexible hose is fixedly fitted with a flange.

[0011] Furthermore, an annular boss is fixed inside the filter bucket, the filter bucket is placed on top of the annular boss, and the filter plate is connected to the annular boss by screws.

[0012] Furthermore, a support frame is fixed to the bottom of the conveying housing.

[0013] Furthermore, the rotating tube is fitted onto the conveying housing, and a sealing ring is installed on the inner wall of the rotating tube, with the sealing ring having an interference fit with the outer wall of the conveying housing.

[0014] The beneficial effects of this utility model are:

[0015] The drive assembly drives the drive plate and filter bucket to move back and forth along the horizontal guide rod. As the weight inside the filter bucket changes in real time, the force on the second spring is different. As a result, the filter bucket produces vertical micro-vibration under the action of the second spring. The dual action can continuously break the agglomerated structure of oil-based rock cuttings, prevent rock cuttings from accumulating on the surface of the filter plate, ensure that the filter holes are always unobstructed, and significantly improve the filtration efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a feeding device for an oil-based rock cuttings pyrolysis kiln according to the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0019] In the diagram, 1-filter hopper, 2-conveying housing, 3-rotating tube, 4-feed pipe, 5-feed hose, 6-filter plate, 7-drive plate, 8-strip groove, 9-horizontal guide rod, 10-guide slider, 11-first spring, 12-motor, 13-cam, 14-vertical slide, 15-vertical guide rod, 16-vibrating slider, 17-second spring, 18-upper hose, 19-rigid tube, 20-flange, 21-annular boss, 22-support frame. Detailed Implementation

[0020] Example

[0021] like Figures 1 to 3 As shown, a feeding device for an oil-based rock cuttings pyrolysis kiln includes a filter hopper 1 and a screw conveyor. The screw conveyor includes a conveying housing 2, an auger conveying assembly, and a rotating pipe 3. The auger conveying assembly is rotatably installed inside the conveying housing 2. The conveying end of the conveying housing 2 is rotatably connected to the rotating pipe 3. The end of the rotating pipe 3 away from the conveying housing 2 is connected to the feed pipe of the pyrolysis kiln. A feed pipe 4 is provided at the top of the conveying housing 2. The bottom of the filter hopper 1 is connected to the feed pipe 4 through a feed hose 5. The filter hopper 1 has a reciprocating linear movement degree of freedom in the horizontal direction. A filter plate 6 is provided inside the filter hopper 1. The oil-based rock cuttings to be decomposed are fed into the filter hopper 1 and filtered through the filter hopper 1. The process removes solid impurities from oil-based rock cuttings, allowing them to enter the conveying housing 2. The cuttings are then transported to the pyrolysis kiln via an auger conveyor assembly. A rotary pipe 3 connects the screw conveyor to the kiln. Since the kiln requires rotation for uniform pyrolysis, the rotary pipe 3 is connected to the kiln's feed shaft via a flange, providing rotational freedom between the rotary pipe 3 and the conveying housing 2. This adapts to the kiln's rotational freedom, ensuring smooth feeding. During filtration, the reciprocating linear motion of the filter bucket 1 generates vibration, accelerating the filtration of the oil-based rock cuttings and preventing accumulation on the filter plate 6 surface. This ensures the filter pores remain unobstructed, significantly improving filtration efficiency. Specifically, the auger conveyor assembly includes an auger shaft and auger blades fixedly mounted on it. The auger shaft is rotatably connected to the conveying housing 2. An auger motor is installed at the feed end of the conveying housing 2, and its output shaft is connected to the auger shaft. This auger conveyor assembly is existing technology.

[0022] Furthermore, a support frame 22 is fixed at the bottom of the conveying housing 2, which supports the feeding device and makes the arrangement of the feeding device more stable.

[0023] Example 2

[0024] Based on Embodiment 1, the rotating tube 3 is fitted onto the conveying housing 2, and a sealing ring is installed on the inner wall of the rotating tube 3. The sealing ring is interference-fitted with the outer wall of the conveying housing 2 to improve the sealing performance between the rotating tube 3 and the conveying housing 2 and avoid the problem of oil-based rock cuttings leakage.

[0025] Example 3

[0026] Based on Embodiment 2, an annular boss 21 is fixed inside the filter bucket 1, the filter bucket 1 is placed on top of the annular boss 21, and the filter plate 6 is connected to the annular boss 21 by screws, which facilitates the disassembly and assembly of the filter plate 6, facilitates the discharge of filtered solid impurities, and facilitates subsequent maintenance.

[0027] Example 4

[0028] Based on Example 3, such as Figures 1 to 3 As shown, a drive plate 7 is provided on the side wall of the filter hopper 1. The bottom of the drive plate 7 is slidably mounted on the conveying housing 2. A drive assembly is provided on the conveying housing 2. The drive assembly is used to drive the drive plate 7 to perform reciprocating linear motion. A strip groove 8 is provided on the top of the conveying housing 2. A horizontal guide rod 9 is fixed in the strip groove 8. A guide slider 10 is slidably mounted on the horizontal guide rod 9. The guide slider 10 is fixed to the bottom of the drive plate 7. A first spring 11 is mounted on the horizontal guide rod 9. The two ends of the first spring 11 are respectively connected to the guide slider 10 and the conveying housing 2. The drive assembly includes... The system includes a motor 12 and a cam 13. The motor 12 is mounted on the conveying housing 2, and the cam 13 is mounted on the output shaft of the motor 12. The cam 13 contacts the drive plate 7, and the motor 12 drives the cam 13 to rotate. When the distal end of the cam 13 moves closer to the drive plate 7, the cam 13 pushes the drive plate 7 to stretch the first spring 11 and move. When the distal end moves away from the drive plate 7, the drive plate 7 returns to its original position under the reaction force of the first spring 11, thereby causing the cam 13 to rotate cyclically, and causing the drive plate 7 to drive the filter bucket 1 to reciprocate linearly, thereby generating vibration to accelerate filtration.

[0029] Example 5

[0030] Based on Example 4, such as Figure 1 and Figure 3As shown, a vertical groove 14 is provided on the side of the drive plate 7 near the filter bucket 1. A vertical guide rod 15 is fixed in the vertical groove 14. A vibrating slider 16 is slidably sleeved on the vertical guide rod 15. The vibrating slider 16 is fixedly connected to the filter bucket 1. A second spring 17 is sleeved on the vertical guide rod 15. The two ends of the second spring 17 are respectively connected to the vibrating slider 16 and the drive plate 7. Oil-based rock cuttings are put into the filter plate 6. Due to the continuous filtration of oil-based rock cuttings and the continuous input of new oil-based rock cuttings, the weight of the filter bucket 1 changes in real time. This causes the force exerted on the second spring 17 by the vibrating slider 16 to change in real time. Under different compression deformations of the second spring 17, the filter bucket 1 generates micro-vibration in the vertical direction. Through the dual action design of "horizontal reciprocating motion of filter bucket 1 + vertical vibration", the problems of inefficient oil-based rock cuttings filtration and easy clogging of the filter plate are fundamentally solved.

[0031] Example 6

[0032] Based on Embodiment 5, the top flange of the filter bucket 1 is connected to an upper hose 18. The end of the upper hose 18 away from the filter bucket 1 is connected to a rigid pipe 19. The end of the rigid pipe 19 away from the upper hose 18 is fixedly fitted with a flange 20. The upper hose 18 is connected to the discharge pipe of the oil-based rock cuttings discharge pipe or the discharge pipe of the storage tank through the flange 20. When it is necessary to clean the impurities on the filter plate 6 or maintain the filter plate 6, the upper hose 18 can be removed. The arrangement of the upper hose 18 and the feed hose 5 does not affect the vibration of the filter bucket 1.

Claims

1. A feeding device for an oil-based rock cuttings pyrolysis kiln, characterized in that, The device includes a filter bucket (1) and a screw conveyor. The screw conveyor includes a conveying housing (2), an auger conveying assembly, and a rotating pipe (3). The auger conveying assembly is rotatably installed inside the conveying housing (2). The conveying end of the conveying housing (2) is rotatably connected to the rotating pipe (3). The end of the rotating pipe (3) away from the conveying housing (2) is connected to the feed pipe of the pyrolysis kiln. The top of the conveying housing (2) is provided with a feed pipe (4). The bottom of the filter bucket (1) is connected to the feed pipe (4) through a feed hose (5). The filter bucket (1) has a reciprocating linear motion degree of freedom in the horizontal direction. A filter plate (6) is provided inside the filter bucket (1).

2. The feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 1, characterized in that, The filter bucket (1) has a drive plate (7) on its side wall. The bottom of the drive plate (7) is slidably mounted on the conveying housing (2). The conveying housing (2) is provided with a drive assembly, which is used to drive the drive plate (7) to perform reciprocating linear motion.

3. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 2, characterized in that, The top of the conveying housing (2) is provided with a strip groove (8), and a horizontal guide rod (9) is fixed in the strip groove (8). A guide slider (10) is slidably sleeved on the horizontal guide rod (9). The guide slider (10) is fixed at the bottom of the drive plate (7). A first spring (11) is sleeved on the horizontal guide rod (9). The two ends of the first spring (11) are respectively connected to the guide slider (10) and the conveying housing (2).

4. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 3, characterized in that, The drive assembly includes a motor (12) and a cam (13). The motor (12) is mounted on the conveyor housing (2), and the cam (13) is mounted on the output shaft of the motor (12). The cam (13) contacts the drive plate (7).

5. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 2, characterized in that, The drive plate (7) has a vertical groove (14) on the side near the filter bucket (1). A vertical guide rod (15) is fixed in the vertical groove (14). A vibration slider (16) is slidably sleeved on the vertical guide rod (15). The vibration slider (16) is fixedly connected to the filter bucket (1). A second spring (17) is sleeved on the vertical guide rod (15). The two ends of the second spring (17) are respectively connected to the vibration slider (16) and the drive plate (7).

6. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 1, characterized in that, The top flange of the filter bucket (1) is connected to an upper hose (18), and the end of the upper hose (18) away from the filter bucket (1) is connected to a rigid tube (19). The end of the rigid tube (19) away from the upper hose (18) is fixedly fitted with a flange (20).

7. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 1, characterized in that, The filter bucket (1) is fixed with an annular boss (21), the filter bucket (1) is placed on top of the annular boss (21), and the filter plate (6) is connected to the annular boss (21) by screws.

8. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 1, characterized in that, The bottom of the conveying housing (2) is fixed with a support frame (22).

9. A feeding device for an oil-based rock cuttings pyrolysis kiln according to claim 1, characterized in that, The rotating tube (3) is fitted onto the conveying housing (2), and a sealing ring is installed on the inner wall of the rotating tube (3). The sealing ring is interference-fitted with the outer wall of the conveying housing (2).

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