Oil-based sludge treatment equipment for shale gas

Abstract

The invention relates to the technical field of oil-based sludge treatment, in particular to shale gas oil-based sludge treatment equipment which comprises a steam heating tank, a sealing cover, a reservoir and a frame type stirring blade playing a stirring role, and a sludge pipe, a water pipe and a feeding pipe which penetrate into the sealing cover are mounted on the sealing cover; the device further comprises an auxiliary heating mixing assembly arranged in the steam heating tank and the sealing cover, the auxiliary heating mixing assembly is located near the connecting position of the steam heating tank and the sealing cover and used for preheating and mixing oily sludge and water and guiding the oily sludge containing water to flow, and water in the water storage pool is rapidly heated through a steam pipe network of a well drilling site. The heated hot water is mixed with the oily sludge in advance, a jacket steam heating mode of the steam heating tank is matched, the heating time of the oily sludge in the steam heating tank is effectively shortened through the dual heating effect, the problem of low heating efficiency of a single jacket is avoided, the overall treatment efficiency is greatly improved, and the continuous treatment requirement of a well drilling site is met.

Description

Technical Field

[0001] This invention relates to the field of oil-based sludge treatment technology, and more specifically to an oil-based sludge treatment device for shale gas. Background Technology

[0002] Shale gas is an unconventional natural gas found in reservoirs dominated by organic-rich shale. Shale oil sludge is mainly divided into two categories: drilling sludge and surface sludge. Surface sludge can be heated to 50-80°C before pyrolysis using a hot washing skid-mounted system. Demulsifiers / surfactants are added, and the mixture is mechanically stirred to separate crude oil from the surface of soil particles.

[0003] Among them, the heated premix tank is a pretreatment equipment. The screw conveyor / sludge pump continuously and in large quantities feeds sludge into the premix tank, while water and chemicals are continuously added. This is the conditioning stage of oil-based sludge. The tank maintains a fixed liquid level, with water entering and exiting at the same time. The sludge is continuously pumped to the centrifuge. The oil-based sludge (hereinafter referred to as sludge) then enters the three-phase separation system, which can separate water, oil, and solids.

[0004] In existing hot washing skid-mounted systems, the heating premix tank can be heated using shale oil or the on-site steam network of the drilling site to mix sludge with water and add demulsifiers, etc., and then mix them by stirring. During this process, sludge is continuously fed in and sludge with added water and chemicals is continuously discharged. Due to the uneven oil content and different gum content, the heating and preparation stage needs to be adjusted according to the oil content and gum content. Therefore, there are high requirements for the efficiency of mixing chemicals and heating. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an oil-based sludge treatment device for shale gas, which can effectively solve the problem of how to increase the processing capacity of the heating premixing tank in the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an oil-based sludge treatment device for shale gas, comprising a steam heating tank, a cover, a water storage tank, and frame-type stirring blades for stirring. The cover is equipped with a sludge pipe, a water pipe, and a feed pipe that extend into the sludge. The device also includes: An auxiliary heating mixing component is provided inside the steam heating tank and the cover. The auxiliary heating mixing component is located near the connection between the steam heating tank and the cover. It is used to preheat and mix the oily sludge and water, and to guide the flow of the water-containing oily sludge. A water storage tank is connected to a water pump via water pipes, and the water storage tank stores hot water. The sludge pipe and water pipe are distributed along the tangent of the cap on the side of the cap. The feed pipe is vertically installed through the top of the cap to fill it with demulsifier. The sludge pipe and water pipe are oriented in similar directions, and the water flowing out of the water pipe impacts the back side of the sludge flowing out of the sludge pipe and flows on the auxiliary heating mixing assembly at the same time.

[0007] Furthermore, a rotating shaft driven by a motor is installed inside the steam heating tank and the cover, and the frame-type stirring blades that agitate the sludge and water inside the steam heating tank are installed on the rotating shaft.

[0008] Furthermore, the auxiliary heating mixing assembly includes a conical funnel and a fixing ring fixed inside the cover. The conical funnel is rotatably installed at the bottom of the fixing ring, and both the sludge pipe and the water pipe pass through the fixing ring. The inner conical surface of the conical funnel is distributed with spiral guide strips. The fluid flowing out of the sludge pipe and water pipe can flow along the spiral guide bar and then out from the bottom of the conical funnel. The tangential distribution of the sludge pipe and water pipe allows the hot water and sludge to flow out and then flow on the conical funnel.

[0009] Furthermore, a separating conical disk is fixedly connected to the rotating shaft. The separating conical disk is located below the conical funnel and is used to guide the mixture of oil sludge and hot water flowing out from the bottom of the conical funnel.

[0010] Furthermore, an installation base is fixedly installed on the inner side of the cap, an electric push rod is fixedly installed inside the installation base, and a conical moving disk is fixedly connected to the output end of the electric push rod. Spiral guide strips are distributed at the bottom of the conical moving disk, and the conical moving disk is positioned above the liquid separating conical disk.

[0011] Furthermore, the cover is provided with multiple ball bearing support plates, and multiple balls are distributed upward on the ball bearing support plates to support the conical funnel and assist the conical funnel in rotating. A stepper motor is fixedly installed through the side of the cover. The output shaft of the stepper motor is located below the conical funnel and is equipped with a conical drive wheel. The conical drive wheel contacts the conical funnel and drives the conical funnel to rotate. When the stepper motor rotates forward, the spiral of the first spiral guide bar drives the mixture of oil sludge and hot water to flow towards the bottom outlet of the conical funnel; when the stepper motor rotates in reverse, the spiral of the first spiral guide bar drives the mixture of oil sludge and hot water to flow towards the top of the conical funnel.

[0012] Furthermore, the auxiliary heating mixing assembly also includes a pendulum stirring structure, which is distributed at the top of the rotating shaft and driven by a motor. It is used to stir the oil sludge and hot water mixture on the conical funnel, and the stirring direction is in accordance with the spiral direction of the spiral guide bar, which helps the oil sludge and hot water mixture flow along the spiral guide bar to the bottom outlet of the conical funnel.

[0013] Furthermore, the pendulum stirring structure includes a connecting plate fixedly installed at the top of the rotating shaft. Multiple connecting rods and elastic rods are rotatably connected to the bottom of the connecting plate. The connecting rods and elastic rods are circumferentially distributed, and the bottom end of the elastic rod is rotatably connected to the connecting rod. An arc-shaped stirring block is fixedly installed at the bottom of the connecting rod, and the inner and outer sides of the arc-shaped stirring block have multiple stirring plates.

[0014] Furthermore, the bottom outlet edge of the conical funnel extends upward to form a water-retaining ring, and multiple arc-shaped stirring blocks can be closed and attached to the outside of the water-retaining ring.

[0015] The technical solution provided by this invention has the following advantages compared with the known prior art: 1. Shorten the heating time of oily sludge and improve the treatment efficiency: The water in the storage tank is quickly heated by the on-site steam pipeline. The heated water is mixed with the oily sludge in advance. Combined with the jacketed steam heating method of the steam heating tank, the dual heating effect effectively shortens the heating time of the oily sludge in the steam heating tank, avoids the problem of low efficiency of single jacket heating, and greatly improves the overall treatment efficiency, which is suitable for the continuous treatment needs of the drilling site.

[0016] 2. Reduce oil sludge adhesion and lower equipment wear: By preheating the auxiliary heating mixing components, steam heating tank, and related components inside the cap with hot water in advance, it is possible to effectively prevent a large amount of oil sludge from adhering due to low temperature after it is introduced; the inclined angle design of the conical funnel and the smooth surface treatment of the separating conical plate further reduce the adhesion of oil sludge on the component surface; the spiral guide strip of the conical moving plate can actively scrape off the sludge adhering to the surface of the separating conical plate, and the arc-shaped stirring block can scrape off the sludge adhering to the top of the water baffle ring after closing, thus comprehensively reducing the wear and tear of the equipment caused by oil sludge adhesion, lowering the equipment cleaning and maintenance costs, and extending the service life of the equipment.

[0017] 3. Adapting to oily sludge with fluctuating oil content, improving treatment stability: Addressing the issue of inconsistent and fluctuating oil content in oily sludge, the rotation direction of the conical funnel can be adjusted by controlling the forward and reverse rotation of the stepper motor, thereby regulating the flow time of the oily sludge and hot water mixture within the funnel. When the oil content is high, the stepper motor reverses to extend the flow time, increasing the contact time between the hot water and the oily sludge, and the time for the hot water to impact the sludge. Simultaneously, the stirring action of the pendulum agitator promotes thorough diffusion and mixing of the demulsifier, ensuring stable treatment results even with fluctuating oil content and avoiding incomplete treatment due to changes in oil content.

[0018] 4. Improved mixing uniformity and optimized treatment effect: The tangential distribution design of the sludge pipe and water pipe allows hot water to precisely impact the sludge while carrying the demulsifier to fully contact the sludge; the spiral guide strip of the auxiliary heating mixing component guides the spiral flow of the mixture, extending the mixing path and time; the stirring effect of the pendulum stirring structure further enhances the mixing effect, allowing the hot water, oily sludge and demulsifier to fully blend. This not only facilitates the even transfer of heat from the hot water to the oily sludge, reducing the viscosity of the oily sludge, but also allows the demulsifier to fully exert its effect, improving the subsequent treatment effect of the oily sludge and ensuring that the treated oily sludge meets relevant standards. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a structural diagram of the steam heating tank and its cap of the present invention. Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the auxiliary heating mixing component of the present invention; Figure 6 This is a schematic diagram of the internal structure of the cap of the present invention; Figure 7 This is a schematic diagram of the conical funnel of the present invention; Figure 8 This is a top view of the conical moving disk of the present invention; Figure 9 This is a bottom view of the conical moving disk of the present invention; Figure 10 This is a schematic diagram of the pendulum stirring structure of the present invention.

[0021] The labels in the diagram represent: 1. Steam heating tank; 2. Cover; 3. Water storage tank; 4. Sludge pipe; 5. Water pipe; 6. Feeding pipe; 7. Auxiliary heating mixing assembly; 701. Fixing ring; 702. Conical funnel; 7021. Water baffle ring; 703. Swinging stirring structure; 7031. Connecting plate; 7032. Connecting rod; 7033. Elastic rod; 7034. Arc-shaped stirring block; 7035. Stirring plate; 704. Conical moving plate; 705. Spiral guide bar one; 706. Spiral guide bar two; 707. Electric push rod; 708. Mounting base; 709. Ball bearing support plate; 710. Stepper motor; 711. Separating conical plate; 8. Rotating shaft; 9. Frame-type stirring blade. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] The present invention will be further described below with reference to embodiments.

[0024] Reference Figures 1 to 10 Example: A shale gas oil-based sludge treatment device includes a steam heating tank 1, a cover 2, a water storage tank 3, and a frame-type stirring blade 9 for stirring. The cover 2 is equipped with a sludge pipe 4, a water pipe 5, and a feed pipe 6 that extend into the tank. Figure 5 The direction of the middle arrow indicates the flow direction of the oil sludge and hot water; An auxiliary heating mixing assembly 7 is installed inside the steam heating tank 1 and the cover 2 (see reference). Figure 2 The auxiliary heating mixing component 7 is located near the connection between the steam heating tank 1 and the cover 2, and is used to preheat and mix the oil sludge and water, and guide the flow of the water-containing oil sludge; A water pump is connected between the water storage tank 3 and the water pipe 5, and the water storage tank 3 stores hot water. Sludge pipe 4 and water pipe 5 are distributed along the tangent of the cover 2 on the side of the cover 2. Feed pipe 6 is vertically installed through the top of the cover 2 for filling it with demulsifier. Sludge pipe 4 and water pipe 5 are oriented in similar directions, and the water flowing out of water pipe 5 impacts the rear side of the sludge flowing out of sludge pipe 4 and flows on the auxiliary heating mixing assembly 7 at the same time.

[0025] Specifically, a rotating shaft 8 driven by a motor is installed inside the steam heating tank 1 and the cover 2, and a frame-type stirring blade 9 that agitates the sludge and water inside the steam heating tank 1 is installed on the rotating shaft 8.

[0026] Within the skid-mounted system, the steam heating tank 1 and the cap 2 form a sealed chamber connecting sludge and water. Sludge is fed into the steam heating tank 1 and the cap 2 via a conveyor or vacuum pump through the sludge pipe 4. Water is pumped into the steam heating tank 1 and the cap 2 via a water pipe 5 from the water tank 3. A vortex heater or similar device can be installed in the water tank 3, utilizing the on-site steam network to provide high-pressure steam. The mixture of steam and water rapidly heats the water, and then mixes the heated water with the oily sludge, allowing the oily sludge to quickly increase in temperature and reduce its viscosity. Combined with the jacketed steam heating method within the steam heating tank 1, this can shorten the heating time of the oily sludge within the steam heating tank 1 to a certain extent. Conversely, the mixing of hot water and sludge can also handle sludge with fluctuating oil content. When the oil content is high, preheating the oily sludge can reduce the adhesion of the oily sludge to the components within the steam heating tank 1 and shorten the heating time of the oily sludge by the jacket of the steam heating tank 1.

[0027] Both the sludge pipe 4 and the water pipe 5 are tangentially distributed relative to the cap 2. The sludge pipe 4 is located in front of the water pipe 5, meaning that the hot water flowing out of the water pipe 5 will impact the sludge. The feed pipe 6 has its opening facing downwards and is located between the sludge pipe 4 and the water pipe 5. The hot water can carry the demulsifier flowing out of the feed pipe 6 to impact the sludge. After the sludge and hot water merge, they flow in a spiral shape in the auxiliary heating mixing component 7 until they flow downwards into the steam heating tank 1. During this process, the hot water can fully contact the oily sludge, transfer heat to the oily sludge, and quickly mix with the oily sludge. After the mixture of oily sludge and hot water enters the steam heating tank 1, the rotating frame-type stirring blades 9 agitate the oily sludge and hot water, and the steam heating tank 1 heats the mixture of oily sludge and hot water inside.

[0028] When introducing oil sludge into the steam heating tank 1 and the cap 2, a large amount of hot water can be introduced first to preheat the auxiliary heating mixing component 7 and the relevant components inside the steam heating tank 1 and the cap 2. Then, the oil sludge and demulsifier can be introduced to avoid the oil sludge from adhering in large quantities.

[0029] The steam heating tank 1 has a jacket filled with steam, and includes pipes for injecting steam, collecting condensate, and discharging a mixture of oil sludge and hot water (see reference). Figure 2 In this regard, the heating method of the water in the water storage tank 3 and the heating method of the steam heating tank 1 for the oily sludge can both use steam, and both are existing technologies and are not the content to be protected. Therefore, no further restrictions will be made on the heating method, heating structure, etc.

[0030] Specifically, the auxiliary heating mixing assembly 7 includes a conical funnel 702 and a fixing ring 701 fixed inside the cover 2. The conical funnel 702 is rotatably installed at the bottom of the fixing ring 701. The sludge pipe 4 and the water pipe 5 both pass through the fixing ring 701. The inner conical surface of the conical funnel 702 is distributed with spiral guide strips 705. The fluid flowing out of the sludge pipe 4 and the water pipe 5 can flow along the spiral guide bar 705 and then out from the bottom of the conical funnel 702. The hot water and sludge flow out through the tangential distribution of the sludge pipe 4 and the water pipe 5 and then flow on the conical funnel 702.

[0031] The conical funnel 702 is an inverted cone shape with a large upper opening and a small lower opening. Both oil sludge and hot water flow from the fixed ring 701 into the conical funnel 702. After passing through the surface of the conical funnel 702 and being guided by the spiral guide strip 705, they flow into the steam heating tank 1 in a spiral shape from the bottom of the conical funnel 702. The conical funnel 702 and the spiral guide strip 705, which can guide the oil sludge, can prolong the time that the oil sludge and hot water stay on the conical funnel 702. The inclination angle of the inner conical surface of the conical funnel 702 should be between 15° and 25°. If the angle is too large, the oil sludge and hot water will flow away quickly, which is not conducive to the heat conduction of the oil sludge and the mixing of hot water and oil sludge. If the angle is too small, the oil sludge will easily adhere to the conical funnel 702 and the spiral guide strip 705.

[0032] Furthermore, a separating conical disk 711 is fixedly connected to the rotating shaft 8. The separating conical disk 711 is located below the conical funnel 702 and is used to guide the oil sludge and hot water mixture flowing out from the bottom of the conical funnel 702.

[0033] The separating conical disk 711 is located below the bottom outlet of the conical funnel 702. After the oil sludge and hot water are mixed, they flow onto the separating conical disk 711. The separating conical disk 711 is connected to the rotating shaft 8 and will naturally rotate. The separating conical disk 711 first guides the oil sludge and hot water to flow towards the inner wall of the steam heating tank 1, that is, the inner wall of the jacket. The temperature in this part is higher, and the oil sludge and hot water can first come into contact with the high-temperature part, which is beneficial to heating the oil sludge. Secondly, the rotating separating conical disk 711 can use centrifugal force to throw the oil sludge out. With the smooth treatment of the surface of the separating conical disk 711, such as ceramic coating, the adhesion of oil sludge to the separating conical disk 711 can be reduced. At the same time, the thrown-out oil sludge and hot water can more easily come into direct contact with the inner wall of the jacket and be heated quickly. With the frame-type stirring blades 9 close to the inner wall of the jacket, the oil sludge is further heated.

[0034] Specifically, an installation base 708 is fixedly installed on the inner side of the cap 2, an electric push rod 707 is fixedly installed inside the installation base 708, a conical moving disk 704 is fixedly connected to the output end of the electric push rod 707, a spiral guide strip 706 is distributed at the bottom of the conical moving disk 704, and the conical moving disk 704 is above the liquid separating conical disk 711.

[0035] The conical moving disk 704 is controlled to rise and fall by multiple electric push rods 707. When the conical moving disk 704 descends, the spiral guide bar 706 below the conical moving disk 704 contacts the separating conical disk 711. The separating conical disk 711 rotates while the conical moving disk 704 is fixed. The spiral guide bar 706 also rotates relative to the surface of the separating conical disk 711. The rotating spiral guide bar 706 can push the oil sludge adhering to the surface of the separating conical disk 711 towards the edge of the separating conical disk 711, thereby removing the oil sludge adhering to the surface of the separating conical disk 711 from the separating conical disk 711 and throwing it from the separating conical disk 711 onto the inner wall of the steam heating tank 1.

[0036] It should be noted that the spiral direction of the spiral guide bar 706 must match the rotation direction of the rotating shaft 8; otherwise, the sludge will be pushed back towards the rotating shaft 8, i.e., the center position of the separating cone disk 711.

[0037] Specifically, the cover 2 is provided with multiple ball bearing support plates 709. Multiple balls are distributed on the ball bearing support plates 709 facing upwards to support the conical funnel 702 and assist the conical funnel 702 in rotating. A stepper motor 710 is fixedly installed through the side of the cover 2. The output shaft of the stepper motor 710 is located below the conical funnel 702 and is equipped with a conical drive wheel. The conical drive wheel contacts the conical funnel 702 and drives the conical funnel 702 to rotate. When the stepper motor 710 rotates forward, the spiral guide bar 705 drives the oil sludge and hot water mixture to flow towards the bottom outlet of the conical funnel 702; when the stepper motor 710 rotates in reverse, the spiral guide bar 705 drives the oil sludge and hot water mixture to flow towards the top of the conical funnel 702.

[0038] Since the oil content of oily sludge is not constant, it will fluctuate during continuous input. When the oil content is high, it is necessary for hot water to fully contact the oily sludge and for the demulsifier to fully mix within the sludge. At this time, based on the detection of the oil content, the stepper motor 710 is controlled to drive the conical funnel 702 to rotate. Under the forward rotation, the spiral guide bar 705 on the conical funnel 702 uses a spiral to push the mixture of hot water and oily sludge towards the bottom outlet of the conical funnel 702. After the stepper motor 710 reverses, the spiral guide bar 705 generates a thrust on the hot water and oily sludge upwards towards the conical funnel 702 to resist the liquid flow impact from the sludge pipe 4 and the water pipe 5, reduce the flow rate of the oily sludge and hot water mixture, prolong the flow time of the mixture on the conical funnel 702, increase the contact time between the hot water and the oily sludge, and also increase the time for the hot water to impact the oily sludge. Combined with the demulsifier added through the feed pipe 6, the treatment efficiency of the oily sludge is improved in a short time.

[0039] The rotation of the conical funnel 702 depends on the conical drive wheel on the stepper motor 710, as well as the bearing between the fixed ring 701 and the conical funnel 702, and the support of the balls on the ball support plate 709. The position of the stepper motor 710 should be staggered from the ball support plate 709, and a baffle should be provided below the conical drive wheel of the stepper motor 710 to prevent sludge from splashing onto the stepper motor 710 and the conical drive wheel.

[0040] Specifically, the auxiliary heating mixing component 7 also includes a pendulum stirring structure 703, which is located at the top of the rotating shaft 8 and is driven by a motor. It is used to stir the oil sludge and hot water mixture on the conical funnel 702, and the stirring direction is in accordance with the spiral direction of the spiral guide bar 705, so that the oil sludge and hot water mixture can flow along the spiral guide bar 705 towards the bottom outlet of the conical funnel 702.

[0041] Driven by the rotating shaft 8, the rotation direction of the pendulum stirring structure 703 should be consistent with the flow direction of the oily sludge and hot water flowing out of the sludge pipe 4 and the water pipe 5. The rotation speed of the pendulum stirring structure 703 should be greater than the flow velocity of the oily sludge and hot water flowing out of the sludge pipe 4 and the water pipe 5. Only in this way can there be a flow velocity difference in the same direction as the hot water flow, so as to produce a stirring effect. With the increase of rotation speed, the pendulum stirring structure 703 can increase the stirring range and assist the diffusion of the demulsifier.

[0042] Furthermore, the pendulum stirring structure 703 includes a connecting plate 7031 fixedly installed at the top of the rotating shaft 8. Multiple connecting rods 7032 and elastic rods 7033 are rotatably connected to the bottom of the connecting plate 7031. The connecting rods 7032 and elastic rods 7033 are circumferentially distributed, and the bottom end of the elastic rod 7033 is rotatably connected to the connecting rod 7032. An arc-shaped stirring block 7034 is fixedly installed at the bottom of the connecting rod 7032. Multiple stirring plates 7035 are provided on both the inner and outer sides of the arc-shaped stirring block 7034. The bottom outlet edge of the conical funnel 702 extends upward to form a water-blocking ring 7021. The multiple arc-shaped stirring blocks 7034 can be closed and attached to the outside of the water-blocking ring 7021.

[0043] When the rotating shaft 8 is driven by the motor to rotate, the connecting disc 7031 moves accordingly. During this process, the elastic rod 7033 is compressed, and the arc-shaped stirring block 7034 and the upper stirring plate 7035 stir the oil sludge, hot water and demulsifier, and assist the mixing of the demulsifier.

[0044] The closed arc-shaped stirring block 7034 fits against the outside of the water-blocking ring 7021, effectively increasing the height of the water-blocking ring 7021. When hot water is only introduced into the steam heating tank 1 and the cover 2, more hot water can remain on the conical funnel 702, improving the preheating effect of the conical funnel 702. This reduces the adhesion of subsequent oil sludge to the conical funnel 702. The low-speed rotating stirring plate 7035 can also scrape the top of the water-blocking ring 7021, removing the oil sludge that was previously adhered to the top of the water-blocking ring 7021. When the subsequent oil sludge passes over the top of the water-blocking ring 7021, the adhesion between the two will be reduced.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shale gas oil-based sludge treatment device, comprising a steam heating tank (1), a cover (2), a water storage tank (3), and frame-type stirring blades (9) for stirring, wherein the cover (2) is equipped with a sludge pipe (4), a water pipe (5), and a feed pipe (6) that pass through it, characterized in that, Also includes: An auxiliary heating mixing component (7) is provided inside the steam heating tank (1) and the cover (2). The auxiliary heating mixing component (7) is located near the connection between the steam heating tank (1) and the cover (2) and is used to preheat and mix the oil sludge and water, and to guide the flow of the water-containing oil sludge. A water pump is connected between the water tank (3) and the water pipe (5), and hot water is stored in the water tank (3); The sludge pipe (4) and water pipe (5) are distributed along the tangent of the cap (2) on the side of the cap (2). The feed pipe (6) is vertically installed through the top of the cap (2) for filling it with demulsifier. The sludge pipe (4) and water pipe (5) are oriented in similar directions, and the water flowing out of the water pipe (5) impacts the back side of the sludge flowing out of the sludge pipe (4) and flows on the auxiliary heating mixing assembly (7) at the same time.

2. The shale gas oil-based sludge treatment equipment according to claim 1, characterized in that, The steam heating tank (1) and the cover (2) are equipped with a rotating shaft (8) driven by a motor, and the frame stirring blade (9) is installed on the rotating shaft (8).

3. The shale gas oil-based sludge treatment equipment according to claim 1, characterized in that, The auxiliary heating mixing assembly (7) includes a conical funnel (702) and a fixing ring (701) fixed inside the cover (2). The conical funnel (702) is rotatably installed at the bottom of the fixing ring (701). The sludge pipe (4) and the water pipe (5) both pass through the fixing ring (701). The inner conical surface of the conical funnel (702) is distributed with spiral guide strips (705). The fluid flowing out of the sludge pipe (4) and water pipe (5) can flow along the spiral guide bar (705) and then out from the bottom of the conical funnel (702), and the hot water and sludge flow out through the tangential distribution of the sludge pipe (4) and water pipe (5) and then flow on the conical funnel (702).

4. The shale gas oil-based sludge treatment equipment according to claim 3, characterized in that, A separating conical disk (711) is fixedly connected to the rotating shaft (8). The separating conical disk (711) is located below the conical funnel (702) and is used to guide the oil sludge and hot water mixture flowing out from the bottom of the conical funnel (702).

5. The shale gas oil-based sludge treatment equipment according to claim 4, characterized in that, An installation base (708) is fixedly installed on the inner side of the cover (2). An electric push rod (707) is fixedly installed inside the installation base (708). A conical moving disk (704) is fixedly connected to the output end of the electric push rod (707). A spiral guide strip (706) is distributed at the bottom of the conical moving disk (704), and the conical moving disk (704) is located above the liquid separating conical disk (711).

6. The shale gas oil-based sludge treatment equipment according to claim 3, characterized in that, The cover (2) is provided with multiple ball bearing support plates (709). Multiple balls are distributed on the ball bearing support plates (709) facing upwards to support the conical funnel (702) and assist the conical funnel (702) in rotating. A stepper motor (710) is fixedly installed through the side of the cover (2). The output shaft of the stepper motor (710) is located below the conical funnel (702) and is equipped with a conical drive wheel. The conical drive wheel contacts the conical funnel (702) and drives the conical funnel (702) to rotate. When the stepper motor (710) rotates forward, the spiral of the first spiral guide bar (705) drives the oil sludge and hot water mixture to flow towards the bottom outlet of the conical funnel (702); when the stepper motor (710) rotates in reverse, the spiral of the first spiral guide bar (705) drives the oil sludge and hot water mixture to flow towards the top of the conical funnel (702).

7. The shale gas oil-based sludge treatment equipment according to claim 4, characterized in that, The auxiliary heating mixing assembly (7) also includes a pendulum stirring structure (703), which is located at the top of the rotating shaft (8) and is driven by a motor. It is used to stir the oil sludge and hot water mixture on the conical funnel (702), and the stirring direction is in accordance with the spiral direction of the spiral guide bar (705). This helps the oil sludge and hot water mixture flow along the spiral guide bar (705) towards the bottom outlet of the conical funnel (702).

8. The shale gas oil-based sludge treatment equipment according to claim 7, characterized in that, The pendulum stirring structure (703) includes a connecting plate (7031) fixedly installed at the top of the rotating shaft (8). The bottom of the connecting plate (7031) is rotatably connected to multiple connecting rods (7032) and elastic rods (7033). The connecting rods (7032) and elastic rods (7033) are circumferentially distributed, and the bottom end of the elastic rod (7033) is rotatably connected to the connecting rod (7032). An arc-shaped stirring block (7034) is fixedly installed at the bottom of the connecting rod (7032). The arc-shaped stirring block (7034) has multiple stirring plates (7035) on both its inner and outer sides.

9. The shale gas oil-based sludge treatment equipment according to claim 8, characterized in that, The bottom outlet edge of the conical funnel (702) extends upward to form a water-blocking ring (7021), and multiple arc-shaped stirring blocks (7034) can be closed and attached to the outside of the water-blocking ring (7021).

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