Oil sludge heating stirring tank and crude oil recovery method

Abstract

The present invention belongs to the technical field of crude oil processing, and provides an oil sludge heating stirring tank and a crude oil recovery method, comprising a shell, a top plate is arranged on the top of the shell, two groups of side heating pipes are fixedly installed in the shell, and a bottom heating pipe is fixedly installed in the bottom of the shell, and a pumping assembly is arranged in the shell; a stirring shaft driven by a rotating power part is arranged on the top plate to solve the technical problem that the oil sludge separation effect in the prior art is poor, resulting in more impurities in the separated oil. The present invention covers the inside of the shell by side heating pipes and bottom heating pipes, improves thermal efficiency, heats the material evenly, and avoids oil sludge sticking to the wall. At the same time, the inertial follow-up of the oil sludge can be blocked by the baffle, the oil sludge collision rate is increased, and the effect of oil sludge crushing and dispersion is improved. The present invention can be widely used in the operation scene of oil sludge separation.

Description

Technical Field

[0001] The invention belongs to the technical field of crude oil processing, and in particular relates to an oil sludge heating stirring tank and a crude oil recovery method. Background Art

[0002] The sludge is mainly waste bilge sludge, which comes from the heavy fuel oil remaining in the fuel tank of the port tanker before the annual maintenance and hot work, and is manually collected and packed in woven bags and then collected into ton bags. The waste bilge sludge is semi-solid, and its main components are heavy oil, oil-absorbing felt, paraffin, and asphalt (heavy oil stored for a long time is separated at the bottom).

[0003] At present, the main sludge treatment process routes include incineration, thermochemical washing, thermal desorption, pyrolysis carbonization, chemical extraction, biological treatment, etc. When treating sludge, it is necessary to separate the oil and mud in the sludge, and utilize the physical and chemical properties of the sludge and the special structure of the sludge heating stirring tank to achieve the three-phase separation effect of oil, mud and water. The existing stirring tank simply stirs the sludge during use, resulting in poor sludge separation effect, so that the separated oil contains more impurities, which is not conducive to subsequent treatment. Summary of the invention

[0004] The purpose of the present invention is to provide a sludge heating stirring tank and a crude oil recovery method, aiming to solve the technical problem that the sludge separation effect in the prior art is poor, resulting in more impurities in the separated oil.

[0005] The present invention is implemented as follows: an oil sludge heating stirring tank comprises a shell, a top plate is arranged on the top of the shell, two sets of side heating pipes are fixedly installed in the shell, a bottom heating pipe is fixedly installed in the bottom of the shell, and a pumping assembly is arranged in the shell;

[0006] The top plate is provided with a stirring shaft driven by a rotating power part, the stirring shaft is coaxially arranged with the shell and stirring plates arranged at different heights are fixedly mounted on the stirring shaft, a connecting chamber is rotatably mounted on the stirring shaft, symmetrically distributed scraper rods are fixedly mounted on the connecting chamber, an oil scraper plate is rotatably mounted on one end of the scraper rod away from the connecting chamber, a float is fixedly mounted on the oil scraper plate, the top plate is provided with a power module for driving the connecting chamber to rotate, a plurality of oil outlet pipes at different heights are connected to the shell, and a mud outlet pipe is connected to the bottom of the shell.

[0007] Preferably, the side heating pipe is a continuous S-shaped structure and fits the side wall of the shell, and the bottom heating pipe is arranged in contact with the bottom of the shell and covers the bottom of the shell.

[0008] Preferably, a plurality of groups of evenly distributed baffles are fixedly mounted on the inner side wall of the shell.

[0009] Preferably, an air inlet chamber is fixedly installed on the top plate, and a rotating tube with one end extending into the air inlet chamber is rotatably installed on the top plate, the rotating tube is fixedly connected to the output shaft of the rotating power part, the lower end of the rotating tube extends into the connecting chamber and is rotatably connected to the connecting chamber, the lower end of the rotating tube is fixedly connected to the stirring shaft in the connecting chamber, and the stirring shaft is rotatably connected to the connecting chamber.

[0010] Preferably, the pumping assembly includes a support rod, which is fixedly installed in the shell and has a vertical rod slidably installed on the support rod, a float block is fixedly installed at the bottom of the vertical rod, a filter is fixedly installed in the float block and the filter is fixedly connected to a pumping pipe arranged in the vertical rod, and the pumping pipe is connected to a pump fixedly installed on the outside of the shell through a hose.

[0011] Preferably, the connecting chamber is fixedly installed with a horizontal plate spaced apart from the scraper rod, and a first blow box is arranged on the horizontal plate. The surface of the first blow box away from the top plate is connected with multiple groups of blow pipes and the first blow box is connected with the connecting chamber. The connecting chamber is connected with the air intake chamber through a rotating tube, and the air intake chamber is connected with an air pump fixedly installed on the top plate.

[0012] Preferably, multiple groups of guide rods are slidably installed on the transverse plate, one end of the guide rods is fixedly connected to the first blow box, multiple groups of elastic parts are fixedly installed on the first blow box, one end of the elastic part away from the first blow box is fixedly connected to the transverse plate, and two groups of mesh plates are fixedly installed on the connecting chamber, the mesh plates correspond to the position of the first blow box and are located directly below the first blow box.

[0013] Preferably, a telescopic part is fixedly installed on the top wall of the shell, which drives the pressure ring to move up and down. After the pressure ring moves downward, it contacts the first blowing box and pushes the first blowing box to move downward. A laser ranging sensor for detecting the liquid level in the shell is fixedly installed on the top wall of the shell.

[0014] Preferably, a plurality of sets of second blowing boxes are fixedly mounted on the connecting chamber, the second blowing boxes are located in the middle of the stirring shaft, air holes are provided on the surface of the second blowing boxes away from the first blowing boxes, and the second blowing boxes are connected to the connecting chamber through a connecting pipe.

[0015] The present invention also provides a crude oil recovery method, which is applied to the above-mentioned sludge heating stirring tank, and comprises the following steps:

[0016] Step S1: adding a set volume of reclaimed water into the shell, and then passing steam through the side heating pipe and the bottom heating pipe respectively, heating the reclaimed water in the shell through the side heating pipe and the bottom heating pipe, and adding the pretreated sludge into the shell after the reclaimed water is heated to the set temperature;

[0017] Step S2: The stirring shaft is driven to rotate by the rotating power member, so that the stirring plate stirs the oil sludge in the shell, so that the oil sludge in the shell is fully dispersed and separated;

[0018] Step S3: After the oil sludge is fully dispersed and separated, a separation agent is added into the shell and stirred continuously to separate the water, mud and oil in the oil sludge into three phases. After the separation agent is added for a set time, stirring is stopped and the shell is left standing for a set time. After the standing time, the water, mud and oil in the shell are separated into three phases.

[0019] Step S4: The oil scraper is rotated to accelerate the discharge of the top oil. After the oil is discharged, the water in the shell is pumped out by the pumping assembly, and finally the mud at the bottom of the shell is discharged through the mud outlet pipe at the bottom of the shell.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The side heating tube and the bottom heating tube cover the inside of the shell, which improves the thermal efficiency, makes the material heated evenly, and avoids the sludge from sticking to the wall. At the same time, the baffle can block the inertial movement of the sludge, increase the collision rate of the sludge, and improve the effect of sludge crushing and dispersion, thereby improving the separation effect of oil and sludge, improving the cleanliness of the subsequent separated oil, and facilitating the subsequent reuse of the oil.

[0022] 2. When draining oil, the air in the first blow box is ejected downward through the blow pipe. The high-speed ejected air will push the oil below to move downward and enter the water. After entering the water, the oil will collide with the mesh plate below. At the same time, the oil will also impact with the water when entering the water, and then the oil will be dispersed under the impact of the water and the mesh plate. After the oil is dispersed, the impurity particles wrapped inside it are separated from the oil. After that, the dispersed oil will float back to the oil layer in the water, and the impurity particles will fall in the water, so that the impurities carried in the oil can be further separated, further reducing the content of impurities in the oil, improving the cleanliness of the oil, and facilitating the subsequent reuse of the oil.

[0023] 3. The gas in the second blow box is ejected from the air hole into the water. The ejected gas forms a large number of small bubbles in the water and moves upward. When moving upward, the large number of small bubbles collide with the oil entering the water from above again, so that the oil entering the water is further dispersed to improve the separation effect of oil and impurities. At the same time, a large number of small bubbles will push the oil to float rapidly in the water. However, the impurities are small in size and are less affected by the bubbles under the action of gravity. As a result, the oil and the impurities will have a speed difference, so that the impurities can be better separated from the oil, further improving the separation effect of impurities in the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure inside the shell of the present invention.

[0026] Figure 3It is a schematic diagram of the structure of the side heating tube in the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the water pumping component in the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the top plate in the present invention from the first perspective.

[0029] Figure 6 This is a schematic diagram of the structure of the top plate in the present invention from a second viewing angle.

[0030] Figure 7 It is a schematic diagram of the structure inside the connecting chamber in the present invention.

[0031] Figure 8 for Figure 7 A magnified schematic diagram of the A1 region in the middle.

[0032] In the attached drawings: 1. Shell; 2. Top plate; 3. Side heating pipe; 4. Bottom heating pipe; 5. Baffle; 6. Collecting tank; 7. Oil outlet pipe; 8. Support rod; 9. Vertical rod; 10. Float; 11. Filter; 12. Pumping pipe; 13. Pumping pump; 14. Rotating pipe; 15. Stirring shaft; 16. Connecting chamber; 17. Stirring plate; 18. Rotating power part; 19. Cross plate; 20. Guide rod; 21. Elastic part; 22. First blow box; 23. Blowing pipe; 24. Air pump; 25. Power module; 26. Telescopic part; 27. Pressure ring; 28. Mesh plate; 29. ​​Second blow box; 30. Connecting pipe; 31. Air hole; 32. Air inlet chamber; 33. Oil scraper rod; 34. Oil scraper plate; 35. Float; 36. Pumping assembly. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0035] like Figure 1-Figure 4 As shown, an oil sludge heating stirring tank provided by the present invention comprises a shell 1, a top plate 2 is arranged on the top of the shell 1, two groups of side heating pipes 3 are fixedly installed in the shell 1, and a bottom heating pipe 4 is fixedly installed at the bottom of the shell 1, the side heating pipe 3 is a continuous S-shaped structure and fits the side wall of the shell 1, the bottom heating pipe 4 is arranged in contact with the bottom of the shell 1 and covers the bottom of the shell 1, a pumping assembly 36 is arranged in the shell 1, and a plurality of groups of evenly distributed baffles 5 are fixedly installed on the inner side wall of the shell 1;

[0036] The top plate 2 is provided with a stirring shaft 15 driven by a rotating power member 18, the stirring shaft 15 is coaxially arranged with the shell 1 and a stirring plate 17 arranged at different heights is fixedly installed on the stirring shaft 15, a connecting chamber 16 is rotatably installed on the stirring shaft 15, an air inlet chamber 32 is fixedly installed on the top plate 2, a rotating tube 14 with one end extending into the air inlet chamber 32 is rotatably installed on the top plate 2, the rotating tube 14 is fixedly connected to the output shaft of the rotating power member 18, the lower end of the rotating tube 14 extends into the connecting chamber 16 and is rotatably connected to the connecting chamber 16, and the lower end of the rotating tube 14 is connected to the stirring shaft 15 is fixedly connected in the connecting chamber 16, the stirring shaft 15 is rotatably connected to the connecting chamber 16, symmetrically distributed scraper rods 33 are fixedly installed on the connecting chamber 16, a V-shaped scraper plate 34 is rotatably installed at one end of the scraper rod 33 away from the connecting chamber 16, a float 35 is fixedly installed on the scraper plate 34, the top plate 2 is provided with a power module 25 for driving the connecting chamber 16 to rotate, a plurality of groups of oil outlet pipes 7 located at different heights are connected to the shell 1, a collecting tank 6 is fixedly installed on the shell 1, the plurality of groups of oil outlet pipes 7 are all located in the collecting tank 6, and a mud outlet pipe is connected to the bottom of the shell 1.

[0037] In actual application of this embodiment, a set volume of medium water is added to the shell 1, and then steam is passed through the side heating pipe 3 and the bottom heating pipe 4 respectively, and the medium water in the shell 1 is heated by the side heating pipe 3 and the bottom heating pipe 4. The inside of the shell 1 is covered by the side heating pipe 3 and the bottom heating pipe 4, which improves the thermal efficiency, makes the material heated evenly, and prevents the sludge from sticking to the wall. After the medium water is heated to the set temperature, the pretreated sludge is added to the shell 1, and the rotating tube 14 is driven to rotate by the rotating power part 18, and the rotating tube 14 drives the stirring shaft 15 to rotate, and the stirring shaft 15 is driven to rotate. The stirring plate 17 stirs the oil sludge in the shell 1, so that the oil sludge in the shell 1 is fully broken up and separated, and then the separation agent is added into the shell 1 to continue stirring, so that the water, mud and oil in the oil sludge are separated. The oil sludge collides with the baffle plate 5 during the stirring process, and the baffle plate 5 can block the inertial follow-up of the oil sludge, increase the oil sludge collision rate, and improve the effect of breaking and breaking up the oil sludge. After the separation agent is added for a set time, the stirring is stopped and the set time is left to stand. After the standing time, the water, mud and oil in the shell 1 are separated.

[0038] At this time, the connecting chamber 16 is driven to rotate by the power module 25, and the connecting chamber 16 drives the scraper plate 34 to rotate through the scraper rod 33. Due to the setting of the float 35, the end of the scraper plate 34 is always inserted into the upper part of the oil layer, so that when the scraper plate 34 rotates, the oil on the top of the oil layer can be pushed to move outward, and the oil outlet pipe 7 is opened in sequence according to the height of the oil layer liquid level. The oil in the shell 1 can leave the shell 1 along the oil outlet pipe 7, and the oil is pushed to move by the scraper plate 34 to increase the speed of oil discharge. When the oil is discharged, the water in the shell 1 is pumped out by the pumping assembly 36. After the water is discharged, the mud at the bottom of the shell 1 is discharged through the mud outlet pipe at the bottom of the shell 1.

[0039] In an example of the present embodiment, the rotating power part 18 is a motor, and of course it can also be other parts that can output rotational power, such as a hydraulic motor. The motor drives the stirring shaft 15 to rotate, thereby stirring the sludge in the shell 1. The power module 25 can be a motor that drives the connecting chamber 16 to rotate through an engaged gear set. Of course, it can also be a motor that drives the connecting chamber 16 to rotate through a belt or other structures that can drive the connecting chamber 16 to rotate.

[0040] like Figure 1-Figure 4 As shown, a sludge heating and stirring tank provided by the present invention, the pumping assembly 36 includes a support rod 8, the support rod 8 is fixedly installed in the shell 1 and a vertical rod 9 is slidably installed on the support rod 8, a floating block 10 is fixedly installed at the bottom of the vertical rod 9, a filter 11 is fixedly installed in the floating block 10 and the filter 11 is fixedly connected to a pumping pipe 12 arranged in the vertical rod 9, and the pumping pipe 12 is connected to a pumping pump 13 fixedly installed on the outside of the shell 1 through a hose.

[0041] In actual application of this embodiment, after the oil at the top of the shell 1 is drained, the water pump 13 is started, and the water pump 13 draws water from the shell 1 through the water pumping pipe 12, and filters the drawn water through the filter 11 to prevent impurities from clogging the water pumping pipe 12. Since the float 10 can float in the water, when the water level drops below the support rod 8, the float 10 will float on the water surface and the filter 11 and the water pumping pipe 12 will be immersed in the water. Therefore, when the water level continues to drop, the water pumping pipe 12 can always pump out water on the water surface, thereby realizing continuous and comprehensive discharge of water.

[0042] like Figure 1-Figure 8 As shown, a sludge heating and stirring tank provided by the present invention is provided, wherein a connecting chamber 16 is fixedly provided with a transverse plate 19 spaced apart from an oil scraper rod 33, a first blowing box 22 is arranged on the transverse plate 19, a surface of the first blowing box 22 away from the top plate 2 is connected with a plurality of blowing pipes 23 and the first blowing box 22 is connected with the connecting chamber 16, the connecting chamber 16 is connected with an air intake chamber 32 via a rotating tube 14, and the air intake chamber 32 is connected with an air pump 24 fixedly provided on the top plate 2.

[0043] Specifically, multiple sets of guide rods 20 are slidably installed on the horizontal plate 19, one end of the guide rod 20 is fixedly connected to the first blow box 22, and multiple sets of elastic members 21 are fixedly installed on the first blow box 22, and one end of the elastic member 21 away from the first blow box 22 is fixedly connected to the horizontal plate 19.

[0044] Specifically, a telescopic member 26 is fixedly installed on the top wall of the shell 1, and the telescopic member 26 drives the pressure ring 27 to move up and down. After the pressure ring 27 moves downward, it contacts the first blowing box 22 and pushes the first blowing box 22 to move downward. A laser ranging sensor for detecting the liquid level in the shell 1 is fixedly installed on the top wall of the shell 1.

[0045] Specifically, two groups of mesh plates 28 are fixedly installed on the connecting chamber 16 . The mesh plates 28 correspond to the positions of the first blowing boxes 22 and are located directly below the first blowing boxes 22 .

[0046] Specifically, a plurality of second blow boxes 29 are fixedly mounted on the connecting chamber 16 . The second blow boxes 29 are located in the middle of the stirring shaft 15 and air holes 31 are provided on the surface of the second blow boxes 29 away from the first blow boxes 22 . The second blow boxes 29 are connected to the connecting chamber 16 via a connecting pipe 30 .

[0047] In actual application of this embodiment, after the mud, water and oil are separated after standing still, the power module 25 drives the connecting chamber 16 to rotate, and the connecting chamber 16 drives the first blowing box 22, the mesh plate 28 and the second blowing box 29 to rotate synchronously, and the height of the oil liquid level is detected by the laser ranging sensor on the top wall of the shell 1, and then the telescopic member 26 drives the pressure ring 27 to move downward, and the pressure ring 27 contacts the first blowing box 22 after moving downward and pushes the first blowing box 22 to move downward, so that the blowing pipe 23 is inserted into the oil, and the oil liquid level is subsequently monitored in real time, so as to keep the blowing pipe 23 always inserted into the oil, and at the same time, the first blowing box 22 will stretch the elastic member 21 when moving downward;

[0048] When the first blowing box 22 rotates, the air pump 24 transports air into the air inlet chamber 32, and the air enters the connecting chamber 16 through the rotating tube 14, and then enters the first blowing box 22 through the pipeline. The air in the first blowing box 22 is ejected downward through the blowing pipe 23, and the high-speed ejected air will push the oil below to move downward and enter the water. After entering the water, the oil collides with the mesh plate 28 below. At the same time, the oil will also impact with the water when entering the water, and then the oil is dispersed under the impact of the water and the mesh plate 28. After the oil is dispersed, the impurity particles wrapped in it are separated from the oil, and then the dispersed oil will float back to the oil layer in the water, and the impurity particles will descend in the water, so that the impurities carried in the oil can be further separated, the content of impurities in the oil is further reduced, the cleanliness of the oil is improved, and it is beneficial to the subsequent reuse of the oil.

[0049] The gas in the connecting chamber 16 will also enter the second blowing box 29 through the connecting pipe 30, and the gas in the second blowing box 29 will be ejected into the water from the air hole 31. The ejected gas will form a large number of small bubbles in the water and move upward. When a large number of small bubbles move upward, they will collide with the oil entering the water from above again, so that the oil entering the water is further dispersed to improve the separation effect of oil and impurities. At the same time, a large number of small bubbles will push the oil to float up quickly in the water. However, the impurities are small in size and are less affected by the bubbles under the action of gravity. Then, the oil will have a speed difference with the impurities, so that the impurities can be better separated from the oil, further improving the separation effect of impurities in the oil and the cleanliness of the oil after separation. When the oil is drained, the pressure ring 27 is reset, and at this time, the first blowing box 22 is reset under the action of the elastic member 21.

[0050] In an example of the present invention, the telescopic member 26 is an electric telescopic rod, and of course it can also be other components that can actively change the length, such as a hydraulic cylinder, and the electric telescopic rod drives the pressure ring 27 to move, thereby adjusting the position of the first blowing box 22.

[0051] like Figure 1-Figure 6 As shown, the present invention provides a crude oil recovery method, which is applied to the above-mentioned sludge heating stirring tank, and comprises the following steps:

[0052] Step S1: adding a set volume of reclaimed water into the shell 1, and then passing steam through the side heating pipe 3 and the bottom heating pipe 4 respectively, heating the reclaimed water in the shell 1 through the side heating pipe 3 and the bottom heating pipe 4, and adding the pretreated sludge into the shell 1 after the reclaimed water is heated to the set temperature;

[0053] Step S2: The stirring shaft 15 is driven to rotate by the rotating power member 18, so that the stirring plate 17 stirs the oil sludge in the shell 1, so that the oil sludge in the shell 1 is fully dispersed and separated;

[0054] Step S3: After the oil sludge is fully dispersed and separated, a separation agent is added into the shell 1 and stirred continuously to separate the water, mud and oil in the oil sludge into three phases. After the separation agent is added for a set time, stirring is stopped and the mixture is allowed to stand for a set time. After the standing time is reached, the water, mud and oil in the shell 1 are separated into three phases.

[0055] Step S4: The oil scraper 34 is rotated to accelerate the discharge of the top oil. After the oil is discharged, the water in the shell 1 is extracted through the pumping assembly 36, and finally the mud at the bottom of the shell 1 is discharged through the mud outlet pipe at the bottom of the shell 1.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sludge heating and stirring tank, comprising a shell (1), a top plate (2) being arranged on the top of the shell (1), characterized in that: Two groups of side heating pipes (3) are fixedly installed in the shell (1), and a bottom heating pipe (4) is fixedly installed at the bottom of the shell (1), and a water pumping assembly (36) is provided in the shell (1); The top plate (2) is provided with a stirring shaft (15) driven by a rotating power member (18); the stirring shaft (15) is coaxially arranged with the shell (1) and stirring plates (17) arranged at different heights are fixedly mounted on the stirring shaft (15); a connecting chamber (16) is rotatably mounted on the stirring shaft (15); symmetrically distributed oil scraping rods (33) are fixedly mounted on the connecting chamber (16); an oil scraping plate (34) with a V-shaped structure is rotatably mounted on one end of the oil scraping rod (33) away from the connecting chamber (16); a floating ball (35) is fixedly mounted on the oil scraping plate (34); the top plate (2) is provided with a power module (25) driving the connecting chamber (16) to rotate; a plurality of groups of oil outlet pipes (7) located at different heights are connected to the shell (1); and a mud outlet pipe is connected to the bottom of the shell (1); The side heating pipe (3) is a continuous S-shaped structure and fits the side wall of the shell (1); the bottom heating pipe (4) is arranged in contact with the bottom of the shell (1) and covers the bottom of the shell (1); An air inlet chamber (32) is fixedly mounted on the top plate (2); a rotating tube (14) having one end extending into the air inlet chamber (32) is rotatably mounted on the top plate (2); the rotating tube (14) is fixedly connected to an output shaft of a rotating power member (18); the lower end of the rotating tube (14) extends into a connecting chamber (16) and is rotatably connected to the connecting chamber (16); the lower end of the rotating tube (14) is fixedly connected to a stirring shaft (15) in the connecting chamber (16); and the stirring shaft (15) is rotatably connected to the connecting chamber (16).

2. The oil sludge heating stirring tank according to claim 1, characterized in that: A plurality of groups of evenly distributed baffles (5) are fixedly mounted on the inner side wall of the shell (1).

3. The oil sludge heating stirring tank according to claim 1, characterized in that: The pumping assembly (36) comprises a support rod (8), the support rod (8) being fixedly mounted in the housing (1) and a vertical rod (9) being slidably mounted on the support rod (8), a floating block (10) being fixedly mounted at the bottom of the vertical rod (9), a filter (11) being fixedly mounted in the floating block (10), and the filter (11) being fixedly connected to a pumping pipe (12) arranged in the vertical rod (9), and the pumping pipe (12) being connected to a pumping pump (13) fixedly mounted on the outside of the housing (1) via a hose.

4. The oil sludge heating stirring tank according to claim 1, characterized in that: The connecting chamber (16) is fixedly mounted with a transverse plate (19) spaced apart from the oil scraping rod (33); a first blowing box (22) is arranged on the transverse plate (19); a surface of the first blowing box (22) away from the top plate (2) is connected to a plurality of blowing pipes (23); the first blowing box (22) is connected to the connecting chamber (16); the connecting chamber (16) is connected to the air inlet chamber (32) via a rotating tube (14); and the air inlet chamber (32) is connected to an air pump (24) fixedly mounted on the top plate (2).

5. The oil sludge heating stirring tank according to claim 4, characterized in that: A plurality of guide rods (20) are slidably mounted on the transverse plate (19), one end of the guide rods (20) being fixedly connected to the first blow box (22), a plurality of elastic members (21) are fixedly mounted on the first blow box (22), one end of the elastic member (21) away from the first blow box (22) being fixedly connected to the transverse plate (19), and two groups of mesh plates (28) are fixedly mounted on the connection chamber (16), the mesh plates (28) corresponding to the positions of the first blow box (22) and being located directly below the first blow box (22).

6. The oil sludge heating stirring tank according to claim 5, characterized in that: A telescopic member (26) is fixedly mounted on the inner top wall of the housing (1), and the telescopic member (26) drives the pressure ring (27) to move up and down. After the pressure ring (27) moves downward, it contacts the first blowing box (22) and pushes the first blowing box (22) to move downward.

7. The oil sludge heating stirring tank according to claim 4, characterized in that: A plurality of sets of second blowing boxes (29) are fixedly mounted on the connecting chamber (16). The second blowing boxes (29) are located in the middle of the stirring shaft (15) and air holes (31) are provided on the surfaces of the second blowing boxes (29) away from the first blowing boxes (22). The second blowing boxes (29) are connected to the connecting chamber (16) via a connecting pipe (30).

8. A crude oil recovery method, characterized in that: The method is applied to a sludge heating stirring tank as claimed in claim 1, comprising the following steps: Step S1: adding a set volume of reclaimed water into the shell (1), and then passing steam through the side heating pipe (3) and the bottom heating pipe (4) respectively, heating the reclaimed water in the shell (1) through the side heating pipe (3) and the bottom heating pipe (4), and adding the pretreated sludge into the shell (1) after the reclaimed water is heated to a set temperature; Step S2: driving the stirring shaft (15) to rotate by means of the rotating power member (18), thereby causing the stirring plate (17) to stir the oil sludge in the shell (1), so that the oil sludge in the shell (1) is fully broken up and separated; Step S3: After the oil sludge is sufficiently dispersed and separated, a separation agent is added into the shell (1) and stirring is continued to separate the water, mud and oil in the oil sludge. After the separation agent is added for a set time, stirring is stopped and the oil is allowed to stand for a set time. After the standing time is reached, the water, mud and oil in the shell (1) are separated into three phases; Step S4: The oil scraper (34) is rotated to accelerate the discharge of the oil at the top. After the oil is discharged, the water in the shell (1) is extracted through the water pumping assembly (36). Finally, the mud at the bottom of the shell (1) is discharged through the mud discharge pipe at the bottom of the shell (1).

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