A device for rapid separation of oil-containing drill cuttings flakes by laser beam

Abstract

The invention discloses a device for rapid separation of oil-containing drill cuttings with a sheet-shaped laser beam. The bottom end of a material storage mechanism is connected with a discharge straight pipe, which extends vertically and extends into a separation box. A conveyor belt is arranged in the separation box and is spaced below the bottom end of the discharge straight pipe. The conveyor belt extends horizontally in a direction away from the discharge straight pipe. A sheet-shaped laser beam generator is arranged on the separation box. The sheet-shaped laser beam generator emits a light spot for evaporating and separating oil and water in the oil-containing drill cuttings. The light spot covers an area of ​​the conveyor belt used to receive the oil-containing drill cuttings. The oil-containing drill cuttings gradually fall onto the conveyor belt in the separation box through the discharge straight pipe. Since the light spot emitted by the sheet-shaped laser beam generator covers an area of ​​the conveyor belt used to receive the oil-containing drill cuttings, the oil and water in the oil-containing drill cuttings absorb sufficient latent heat of evaporation through rapid heating, and the phases reach their required boiling points and are converted into gaseous states. The oil phase and the water phase in the oil-containing drill cuttings are completely removed, and solid-liquid separation in the drill cuttings is rapidly achieved.

Description

Technical Field

[0001] The invention relates to the field of processing devices for oil-containing drill cuttings, in particular to a device for quickly separating sheet-shaped laser beams of oil-containing drill cuttings. Background Art

[0002] The higher the oil content of the waste oil-containing drill cuttings in the well site, the greater the toxicity. Oil and surfactants are the main costs of oil-based drilling fluids. Through appropriate processes, these substances can be recycled and reused to achieve the purpose of reducing costs. The disposal of waste oil-containing drill cuttings is difficult. Due to their high oil and solid content, the disposal of waste oil-containing drill cuttings is difficult. The waste oil-containing drill cuttings should be deoiled and solid-liquid separated before being disposed of in accordance with regulations.

[0003] At present, the treatment of waste oil-containing drill cuttings mainly includes oil removal, reduction and reduction of environmental hazards. In order to reduce the disposal costs such as transportation, materials and equipment investment, the source reduction treatment of waste oil-containing drill cuttings is the most direct and effective means of reducing costs. The components of waste oil-containing drill cuttings are complex, the components are stable and not easy to break, and the treatment is extremely difficult. At present, the waste oil-containing drill cuttings treatment technologies at home and abroad mainly include centrifugation, reinjection, microbial degradation, incineration, heat treatment and solvent extraction. How to provide a treatment equipment that can quickly gather energy in a short time, as well as its strong adaptability, thorough oil removal effect (residue TPH content is less than 1%), small equipment footprint, and all-weather working ability, has quickly become a problem that urgently needs to be solved to solve the pollution of oil-containing solid waste. In the process of thermal analysis treatment of oil-containing drill cuttings, safety risks, environmental protection costs, and economic and timeliness in production should be considered. Therefore, how to reasonably and efficiently use thermal analysis treatment technology to form a thermal analysis treatment device is also a problem that needs to be solved at present. Summary of the invention

[0004] The object of the present invention is to provide a device for rapid separation of oil-containing drill cuttings by a sheet laser beam to solve the problems existing in the above-mentioned prior art. The light spot generated by the sheet laser beam generator can quickly and uniformly heat the oil-containing drill cuttings placed on a conveyor belt, and the device can quickly and efficiently separate solid and liquid in the drill cuttings. The device has a simple and miniaturized structure. At the same time, the control method of the sheet laser beam rapid separation technology is clear, and its control accuracy is also high.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a device for rapid separation of oil-containing drill cuttings with a sheet laser beam, comprising a storage mechanism for containing oil-containing drill cuttings and a separation box located below the storage mechanism, wherein the bottom end of the storage mechanism is connected to a discharge straight pipe, the discharge straight pipe extends vertically and extends into the separation box, and a conveyor belt is provided in the separation box and is arranged below the bottom end of the discharge straight pipe, the conveyor belt extends horizontally in a direction away from the discharge straight pipe; a sheet laser beam generator is provided on the separation box, the sheet laser beam generator emits a light spot for evaporating and separating oil and water in the oil-containing drill cuttings, the light spot covers the area of ​​the conveyor belt for receiving the oil-containing drill cuttings; the top of the separation box is connected to an exhaust pump for extracting oil vapor and water vapor out of the separation box; the discharge end of the conveyor belt is provided with a slag discharge pipe for receiving and collecting the oil-containing drill cuttings, the slag discharge pipe extends out of the separation box and is provided with a slag discharge pump.

[0006] Preferably, the sheet laser beam generator includes a laser, a spherical mirror group for converging the light spot emitted by the laser into a point light source, and a cylindrical mirror for converting the point light source into a rectangular light spot, the spherical mirror group includes a plurality of spherical mirrors with different optical focal lengths, each of the spherical mirrors and the cylindrical mirror is sequentially arranged on an output light path of the laser, and the optical focal length of each of the spherical mirrors increases sequentially along the output light path.

[0007] Preferably, the cross-section of the straight discharge pipe is a rectangular structure that matches the shape of the rectangular light spot.

[0008] Preferably, the discharge straight pipe is connected to a first blower and a second blower with adjustable wind speed, the first blower and the second blower are staggered in the vertical direction, and blow 120° C. water vapor into the discharge straight pipe in opposite directions.

[0009] Preferably, a third blower and a fourth blower are provided in the separation box, the third blower is located at the input side of the conveyor belt, the fourth blower is located at the bottom of the conveyor belt, and the third blower and the fourth blower are both facing the area of ​​the conveyor belt for receiving oil-containing drill cuttings.

[0010] Preferably, a plurality of vibrators are provided below the conveying portion of the conveyor belt, and the vibrators include a vibrator body fixedly installed in the separation box and an excitation plate installed on the vibrator body, and the excitation plate is attached to the bottom surface of the conveying portion.

[0011] Preferably, the exhaust pump is connected to a recovery mechanism for separating and treating oil vapor and water vapor, and the recovery mechanism includes a condenser connected to the outlet of the exhaust pump, the liquid outlet of the condenser is connected to a centrifuge for separating oil and water, and the gas outlet of the condenser is connected to an exhaust gas recovery box for collecting untreated clean exhaust gas.

[0012] Preferably, the outlet of the slag discharge pipe is connected to a cooling box for cooling the oil-containing drill cuttings, and the outlet of the cooling box is provided with a detector for detecting the effect of separation of the oil-containing drill cuttings.

[0013] Preferably, a waste residue collection box and a return pipe are connected in parallel to the outlet of the detector, and the return pipe is connected to the storage mechanism.

[0014] Preferably, the material storage mechanism comprises a drill cuttings box, the bottom end of the drill cuttings box is connected to the discharge straight pipe, a vertically extending stirring shaft is rotatably provided in the drill cuttings box, and a stirring blade for evenly stirring the oil-containing drill cuttings is provided on the stirring shaft.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] First, a discharge straight pipe is connected to the bottom end of the storage mechanism, which extends vertically and extends into the separation box, and a conveyor belt is provided in the separation box, which is spaced below the bottom end of the discharge straight pipe, and the conveyor belt extends horizontally in a direction away from the discharge straight pipe; a sheet laser beam generator is provided on the separation box, which emits a light spot for evaporating and separating oil and water in the oil-containing drill cuttings, and the light spot covers the area of ​​the conveyor belt for receiving the oil-containing drill cuttings; an exhaust pump for extracting oil vapor and water vapor out of the separation box is connected to the top of the separation box; a slag discharge pipe for receiving and collecting the oil-containing drill cuttings is provided at the discharge end of the conveyor belt, and the slag discharge pipe extends out of the separation box and is provided with a slag discharge pump. During the separation process, the oil-containing drill cuttings gradually fall onto the conveyor belt in the separation box through the discharge straight pipe. Since the light spot emitted by the sheet laser beam generator covers the area of ​​the conveyor belt for receiving the oil-containing drill cuttings, the light spot is focused on the oil-containing drill cuttings placed on the conveyor belt. The oil-containing drill cuttings are quickly and evenly heated. The oil and water in the oil-containing drill cuttings absorb enough latent heat of evaporation through rapid heating, and the phases reach their required boiling points and are converted into gaseous states. The oil phase and water phase in the oil-containing drill cuttings are completely removed, thereby quickly realizing the solid-liquid separation in the drill cuttings. After the oil-containing drill cuttings contact the light spot, they are transported by a conveyor belt to move away from the light spot. New oil-containing drill cuttings gradually fall from the discharge straight pipe and contact the light spot again, forming a working state in which the oil-containing drill cuttings are continuously heated and processed. The evaporated oil vapor and water vapor are quickly sucked out of the separation box by the exhaust pump. The drill cuttings after oil and water separation are transported to one side by a conveyor belt and quickly flow out of the separation box through a slag discharge pipe and a slag discharge pump, so as to avoid condensation in the separation box and increase the risk of re-combining with the drill cuttings, thereby ensuring the separation effect of oil, water and solid phases in the oil-containing drill cuttings. Moreover, the entire device can continuously perform oil-water separation treatment on the oil-containing drill cuttings, thereby fully ensuring the treatment efficiency of the oil-containing drill cuttings.

[0017] Second, the sheet laser beam generator includes a laser, a spherical mirror group for converging the light spot emitted by the laser into a point light source, and a cylindrical mirror for converting the point light source into a rectangular light spot. The spherical mirror group includes a plurality of spherical mirrors with different optical focal lengths. Each spherical mirror and cylindrical mirror is sequentially arranged on the output light path of the laser, and the optical focal length of each spherical mirror increases sequentially along the output light path. The sheet laser beam generator can shape the light spot emitted by an ordinary laser into a sheet light spot, reducing the limitation of the sheet laser source on the laser itself. The power density in the rectangular light spot generated by the sheet light generator is evenly distributed.

[0018] Third, the cross-section of the discharge straight pipe is a rectangular structure that matches the shape of the rectangular light spot. When the oil-containing drill cuttings fall along the discharge straight pipe until they form a certain thickness on the conveyor belt, the conveyor belt will transport the heated oil-containing drill cuttings away. Since the cross-section of the discharge straight pipe is a rectangular structure, the oil-containing drill cuttings maintain a corresponding rectangular shape in the discharge straight pipe and flow into the conveyor belt. The rectangular light spot completely covers the oil-containing drill cuttings, and then the oil and water in the oil-containing drill cuttings are quickly heated and evaporated, and the rectangular light spot is ensured to match the cross-section of the discharge straight pipe, so that the rectangular light spot will not extend outside the oil-containing drill cuttings, thereby avoiding energy waste of the rectangular light spot.

[0019] Fourth, the discharge straight pipe is connected to a first blower and a second blower with adjustable wind speed. The first blower and the second blower are staggered in the vertical direction, and blast 120°C steam toward the discharge straight pipe in opposite directions. The oil-containing drill cuttings are broken up by blasting 120°C steam toward each other, so that the solid and liquid particles therein are evenly distributed, thereby ensuring that they are heated evenly afterwards. At the same time, some water in the oil-containing drill cuttings will evaporate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a front view of the overall structure of the present invention;

[0022] Figure 2 A top view of the conveyor belt of the present invention;

[0023] Figure 3 It is a side view of the overall structure of the present invention;

[0024] Among them, 1-drill cuttings box, 2-flow control valve, 3-discharging straight pipe, 4-first blower, 5-second blower, 6-first sheet laser beam generator, 7-third blower, 8-second sheet laser beam generator, 9-separation box, 10-oil-containing drill cuttings, 11-fourth blower, 12-fixed frame, 13-driving wheel, 14-transmission belt, 15-excitation plate, 16-exciter, 17-fixed plate, 18-support frame, 19-exhaust pump, 20-transmission belt controller, 21-drainage pump, 22-condenser, 23-centrifuge, 24-oil phase collection box, 25-water phase collection box, 26-tail gas treatment device, 27-waste gas recovery box, 28-slag pump, 29-cooling box, 30-detector, 31-waste residue collection box, 32-automatic loader, 33-drive motor, 34-stirring shaft, 35-stirring blade. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The object of the present invention is to provide a device for rapid separation of oil-containing drill cuttings by a sheet laser beam to solve the problems existing in the above-mentioned prior art. The light spot generated by the sheet laser beam generator can quickly and uniformly heat the oil-containing drill cuttings placed on a conveyor belt, and the device can quickly and efficiently separate solid and liquid in the drill cuttings. The device has a simple and miniaturized structure. At the same time, the control method of the sheet laser beam rapid separation technology is clear, and its control accuracy is also high.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figures 1 to 3The present embodiment provides a device for rapid separation of oil-containing drill cuttings by a sheet-shaped laser beam, comprising a storage mechanism for containing oil-containing drill cuttings 10, and a separation box 9 located below the storage mechanism, wherein the bottom end of the storage mechanism is connected to a discharge straight pipe 3, the discharge straight pipe 3 extends vertically and extends into the separation box 9, and a conveyor belt 14 is provided in the separation box 9 and is arranged below the bottom end of the discharge straight pipe 3, and the conveyor belt 14 extends horizontally in a direction away from the discharge straight pipe 3; a sheet-shaped laser beam generator is provided on the separation box 9, and the sheet-shaped laser beam generator emits a laser beam for vaporizing the oil and water in the oil-containing drill cuttings 10. The light spot emitted by the sheet laser beam generator covers the area of ​​the conveyor belt 14 used to receive the oil-containing drill cuttings 10; the top of the separation box 9 is connected to an exhaust pump 19 for extracting oil vapor and water vapor out of the separation box 9; the discharge end of the conveyor belt 14 is provided with a slag discharge pipe for receiving and collecting the oil-containing drill cuttings 10, the slag discharge pipe extends out of the separation box 9 and is provided with a slag discharge pump 28. During the separation process, the oil-containing drill cuttings 10 gradually fall onto the conveyor belt 14 in the separation box 9 through the discharge straight pipe 3. Since the light spot emitted by the sheet laser beam generator covers the conveyor belt 14 In the area for receiving the oil-containing drill cuttings 10, the oil-containing drill cuttings 10 placed on the conveyor belt 14 are quickly and evenly heated by focusing the light spot. The oil and water in the oil-containing drill cuttings 10 absorb enough latent heat of evaporation through rapid heating, and the phases reach their required boiling points and are converted into gaseous states. The oil phase and water phase in the oil-containing drill cuttings 10 are completely removed, thereby quickly realizing the solid-liquid separation in the drill cuttings. After the oil-containing drill cuttings 10 contact the light spot, the drill cuttings are transported by the conveyor belt 14 to move away from the light spot, and new oil-containing drill cuttings 10 gradually fall from the discharge straight pipe 3 and contact the light spot again. The oil-containing drill cuttings 10 are continuously heated and processed, and the evaporated oil vapor and water vapor are quickly sucked out of the separation box 9 through the exhaust pump 19. The drill cuttings after oil and water separation are transported to one side through the conveyor belt 14, and quickly flow out of the separation box 9 through the slag discharge pipe and the slag discharge pump 28, so as to avoid condensation in the separation box 9 and increase the risk of re-combining with the drill cuttings, thereby ensuring the separation effect of oil, water and solid phase in the oil-containing drill cuttings 10, and the whole device can continuously perform oil-water separation treatment on the oil-containing drill cuttings 10, fully ensuring the treatment efficiency of the oil-containing drill cuttings 10. The whole device of the present invention has a processing capacity of about 1267.2 kg / h, and has the advantages of miniaturization, high oil removal effect, and high economy and timeliness in production.

[0029] As a preferred embodiment of the present invention, two groups of sheet laser beam generators are provided on the separation box 9, including a first sheet laser beam generator 6 and a second sheet laser beam generator 8. The first sheet laser beam generator 6 and the second sheet laser beam generator 8 are respectively located directly above the conveyor belt 14, and are located at the front and rear sides of the discharge straight pipe 3 along the conveying direction of the conveyor belt 14, and are placed at an angle of 30° with the vertical square. The uniform laser sheet width is 30 mm, the first and second sheet laser beam generators 8 can irradiate a thickness of 30 mm, and the horizontal irradiation range is 17.32 mm, that is, through the two sheets The uniform light with a width of 30 mm generated by the two-piece laser beam generator is tilted at 30° to illuminate the material area dropped from the oil-containing drill cuttings 10 tank, and illuminates its thickness and horizontal range. Moreover, the uniform power density sheet laser beam is used for tilted illumination. The light spots emitted by the two sheet laser beam generators are connected and jointly cover the area of ​​the conveyor belt 14 used to receive the oil-containing drill cuttings 10. By heating, the oil phase and water in the oil-containing drill cuttings 10 absorb enough latent heat of evaporation, and the phases reach their required boiling points and are converted into gaseous states. The oil phase and water phase in the oil-containing drill cuttings 10 are completely removed, thereby achieving solid-liquid separation. Preferably, a fixing frame 12 is provided in the separation box 9, and the fixing frame 12 fixes the first sheet laser beam generator 6 and the second sheet laser beam generator 8 at a height of 100 mm at the upper end of the conveyor belt 14, and the distance between the two sheet laser beam generators is 100 mm. The two sheet laser beam generators have the same emission power density and are connected to the same controller. Furthermore, it is preferred that the irradiation thickness of the first and second sheet-shaped laser beam generators 8 matches the thickness of the oil-containing drill cuttings 10 on the conveyor belt 14 .

[0030] Moreover, the sheet laser beam generator includes a laser, a spherical mirror group for converging the light spot emitted by the laser into a point light source, and a cylindrical mirror for converting the point light source into a rectangular light spot. The spherical mirror group includes a plurality of spherical mirrors with different optical focal lengths. Each spherical mirror and cylindrical mirror are sequentially arranged on the output light path of the laser, and the optical focal length of each spherical mirror increases sequentially along the output light path. The sheet laser beam generator can shape the light spot emitted by an ordinary laser into a sheet light spot, reducing the limitation of the sheet laser source on the laser itself, and the power density distribution in the rectangular light spot generated by the sheet light generator is uniform. And the preferred sheet laser beam generator is controlled by an externally connected integrator.

[0031] Furthermore, the cross-section of the discharge straight pipe 3 is a rectangular structure that matches the shape of the rectangular light spot. When the oil-containing drill cuttings 10 fall along the discharge straight pipe 3 until the oil-containing drill cuttings 10 of a certain thickness are formed on the conveyor belt 14, the conveyor belt 14 transports the heated oil-containing drill cuttings 10 away. Since the cross-section of the discharge straight pipe 3 is a rectangular structure, the oil-containing drill cuttings 10 maintain a corresponding rectangular shape in the discharge straight pipe 3 and flow into the conveyor belt 14. The rectangular light spot completely covers the oil-containing drill cuttings 10, and then the oil and water in the oil-containing drill cuttings 10 are quickly heated and evaporated, and the rectangular light spot is ensured to match the cross-section of the discharge straight pipe 3, so that the rectangular light spot does not extend outside the oil-containing drill cuttings 10, thereby avoiding energy waste of the rectangular light spot.

[0032] The conveyor belt 14 is equipped with a conveyor belt controller 20, which is operated by adjusting the speed of the controller, and a flow regulating valve is preferably provided at the inlet of the discharge straight pipe 3. By adjusting the flow control valve 2 of the drill cuttings box 1, the oil-containing drill cuttings 10 are quantitatively dropped along the discharge straight pipe 3 until the conveyor belt 14 forms a certain thickness of oil-containing drill cuttings 10. The conveyor belt 14 starts to start and transports the heated oil-containing drill cuttings 10 away. The flow rate of the discharge straight pipe 3 is determined by the flow control valve 2, and the flow rate determines the amount of drill cuttings falling. When the oil-containing drill cuttings 10 move on the conveyor belt 14, the thickness of the oil-containing drill cuttings 10 dropped from the discharge straight pipe 3 to the conveyor belt 14 per unit time is determined by the flow rate of the discharge straight pipe 3 and the speed of the conveyor belt 14. The preferred conveyor belt 14 is an annular belt, which is equipped with two driving wheels 13, which are arranged in the horizontal direction. The driving wheels 13 drive the conveyor belt 14 to reciprocate and ensure the horizontal transmission of the conveyor belt 14.

[0033] Preferably, the discharge straight pipe 3 is connected to a first blower 4 and a second blower 5 with adjustable wind speed. The first blower 4 and the second blower 5 are staggered in the vertical direction and blow 120°C water vapor toward the discharge straight pipe 3 in opposite directions. The oil-containing drill cuttings 10 are broken up by blowing 120°C water vapor in opposite directions, so that the solid and liquid particles therein are evenly distributed, thereby ensuring that they are heated evenly afterwards. At the same time, some water in the oil-containing drill cuttings 10 will be evaporated, and the oil-containing drill cuttings 10 can be prevented from being deposited at the bottom of the drill cuttings box 1.

[0034] Moreover, the separation box 9 is provided with a third blower 7 and a fourth blower 11, the third blower 7 is located at the input side of the conveyor belt 14, the fourth blower 11 is located at the bottom of the conveyor belt 14, and the third blower 7 and the fourth blower 11 are both facing the area of ​​the conveyor belt 14 for receiving the oil-containing drill cuttings 10, and the third blower 7 and the fourth blower 11 work together to prevent the bottom of the oil-containing drill cuttings 10 from being coked during the heating process. Further, the third blower 7 and the fourth blower 11 jointly blow air to the oil-containing drill cuttings 10 transported by the sheet laser beam treatment, so that the oil-containing drill cuttings 10 are tumbled, so that the particles, water and oil in the oil-containing drill cuttings 10 are evenly distributed. Preferably, the fourth blower 11 has six air outlets, so as to further make the oil-containing drill cuttings 10 tumble on the conveyor belt 14, so that they are evenly distributed.

[0035] As a preferred embodiment of the present invention, a plurality of vibrators 16 are provided below the conveying portion of the conveyor belt 14. The vibrators 16 include a vibrator body 16 fixedly installed in the separation box 9 and a vibration plate 15 installed on the vibrator body 16. The vibration plate 15 is attached to the bottom surface of the conveying portion. Specifically, the vibrator 16 utilizes a vibration mechanism. The vibrator 16 is installed on a fixed plate 17. The vibrator 16 drives the vibration plate 15 and the conveyor belt 14 to vibrate up and down through a spring. The high vibration frequency and low amplitude vibrate the oil-containing drill cuttings 10 on the conveyor belt 14, and then cooperate with the third and fourth blowers 11 to evenly distribute the oil-containing drill cuttings 10. Similarly, under the irradiation of the sheet laser beam, the oil-containing drill cuttings 10 are evenly heated. Preferably, the vibrator body 16 is connected to the wheel core of the drive wheel 13 through a fixed plate 17.

[0036] Further, the exhaust pump 19 is connected to a recovery mechanism for separating and treating oil vapor and water vapor, and the recovery mechanism includes a condenser 22 connected to the outlet of the exhaust pump 19, the liquid outlet of the condenser 22 is connected to a centrifuge 23 for separating oil and water, and the gas outlet of the condenser 22 is connected to a waste gas recovery box 27 for collecting untreated clean waste gas. The mixed steam of oil vapor and water vapor is cooled in the condenser 22, and the water and oil are separated according to different densities by the centrifuge 23. The untreated clean waste gas enters the waste gas recovery box 27 for collection. Preferably, a tail gas treatment device 26 is provided at the inlet of the waste gas recovery box 27 to purify the untreated clean waste gas, filter and adsorb harmful gases, etc. Preferably, the liquid outlet of the centrifuge 23 is respectively connected to an oil phase collection box 24 and a water phase collection box 25 to store oil and water respectively.

[0037] Preferably, the outlet of the slag discharge pipe is connected to a cooling box 29 for cooling the oil-containing drill cuttings 10. The outlet of the cooling box 29 is provided with a detector 30 for detecting the effect of the separation of the oil-containing drill cuttings 10. When the drill cuttings after the separation of oil and water are discharged, the drill cuttings are transmitted to the output end of the conveyor belt 14, and are sucked into the slag discharge pipe by the slag discharge pump 28, and discharged from the separation box 9. After being cooled by the cooling box 29, damage to the detector 30 is avoided when the drill cuttings are subsequently detected by the detector 30. After being detected by the detector 30, qualified drill cuttings are recycled and unqualified drill cuttings are discharged into the storage mechanism again. As a preferred embodiment of the present invention, the bottom of the separation box 9 is connected to a drainage pump 21 to discharge the liquid oil and water that have not been completely evaporated and the condensed oil and water from the separation box 9. Preferably, the drainage pump 21 is connected to the condenser 22. After further condensation, the oil and water are separated by the centrifuge 23.

[0038] Moreover, the outlet of the detector 30 is connected in parallel with a waste collection box 31 and a return pipe. The drill cuttings that pass the inspection are recovered into the waste collection box 31, and the drill cuttings that fail the inspection still have a large amount of oil and water, which are discharged into the return pipe. The return pipe is connected to the storage mechanism, and the drill cuttings are discharged into the separation box 9 through the storage mechanism, so that the unqualified drill cuttings can be separated again.

[0039] As a preferred embodiment, the storage mechanism includes a cuttings box 1. Preferably, the cuttings box 1 is fixed to the ground by a support frame 18, and the main body of the flow control valve 2 is also installed on the support frame 18. The bottom end of the cuttings box 1 is connected to a discharge straight pipe 3. A vertically extending stirring shaft 34 is provided in the cuttings box 1 for rotation. The stirring shaft 34 is provided with stirring blades 35 for uniformly stirring the oil-containing cuttings 10. The stirring action of the stirring shaft 34 and the stirring blades 35 on the oil-containing cuttings 10 makes the oil-containing cuttings 10 more evenly distributed in the cuttings box 1. Preferably, a driving motor 33 is provided on the cuttings box 1. The driving motor 33 is in transmission connection with the stirring shaft 34. The driving motor 33 drives the stirring shaft 34 to rotate so that the stirring blades 35 stir the oil-containing cuttings 10 in the stirring box. Preferably, the feed inlet of the cuttings box 1 is equipped with an automatic chain feeder. The oil-containing cuttings 10 are discharged into the cuttings box 1 through the automatic chain feeder, and the preferred return pipe is connected to the automatic chain feeder.

[0040] Furthermore, the automatic feeder 32 contains a groove, and when reaching the opening of the drill cuttings box 1, the oil-containing drill cuttings 10 in the groove fall into the drill cuttings box 1, completing the automatic feeding process. The drill cuttings box 1 contains two pairs of stirring shafts 34, and the two stirring shafts 34 are arranged in the horizontal direction to fully stir the drill cuttings. In addition, the bottom of the drill cuttings box 1 is provided with an inclined surface, which is conducive to the oil-containing drill cuttings 10 flowing out when the flow control valve 2 is opened. The bottom outlet of the drill cuttings box 1 is a rectangular shape matched with the discharge straight pipe 3, which is 60mm long and 300mm wide. The inclined arm is upward along the rectangle, so that the oil-containing drill cuttings 10 coming out of the flow control valve 2 is rectangular, and then flows out through the discharge straight pipe 3. The oil-containing drill cuttings 10 remain rectangular in the discharge straight pipe 3 and flow into the conveyor belt 14 along the valve.

[0041] As a preferred embodiment of the present invention, in a specific implementation, by adjusting the flow valve, the thickness of the oil-containing drill cuttings 10 flowing out from the rectangular opening at the bottom of the drill cuttings box 1 to the conveyor belt 14 is 40 mm. According to the formula volume flow rate (Q) = average flow velocity (v) × rectangular outlet cross-sectional area (A), the volume falling along the rectangular opening to the conveyor belt 14 is 40 mmX60 mmX300 mm, and its outlet cross-sectional area is 18000 mm2. The flow rate of the flow control valve 2 is 20 mm / s, and the upper end of the rectangular connecting pipe is a straight pipe. The falling time of the oil-containing drill cuttings 10 under the action of gravity is short and can be ignored. When the controller is adjusted, when the conveyor belt 14 moves horizontally to the right at 0.0133 m / s, the horizontal length of the oil-containing drill cuttings 10 can reach 400 mm. After 2 seconds, the flow control valve 2 is opened for two seconds, and the thickness flowing into the conveyor belt 14 is 40 mm, so the oil-containing drill cuttings 10 on the conveyor belt 14 can be regarded as continuous.

[0042] Combined with the actual situation of the offshore platform, an efficient processing method for focused sheet laser beams is proposed. The entire sheet laser beam rapid separation device composed of the above-mentioned components has a width of no more than 400 mm, a length of no more than 600 mm, and a height of about 500 mm. The processing capacity of the entire sheet laser beam rapid separation device is about 1267.2 kg / h. Other collection and processing devices are attached to the separation device and occupy a small space. The oil-containing drill cuttings 10 processing process device has the advantages of miniaturization, high oil removal effect, and high economy and timeliness in production.

[0043] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0044] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0045] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A laser beam rapid separation device for oil-containing drill cuttings flakes, characterized in that: It comprises a storage mechanism for containing oil-containing drill cuttings and a separation box located below the storage mechanism, the bottom end of the storage mechanism is connected with a discharge straight pipe, the discharge straight pipe extends vertically and extends into the separation box, and a conveyor belt is arranged in the separation box below the bottom end of the discharge straight pipe, and the conveyor belt extends horizontally in a direction away from the discharge straight pipe; a sheet laser beam generator is provided on the separation box, the sheet laser beam generator emits a light spot for evaporating and separating oil and water in the oil-containing drill cuttings, and the light spot covers the area of ​​the conveyor belt for receiving the oil-containing drill cuttings; the top of the separation box is connected with an exhaust pump for extracting oil vapor and water vapor out of the separation box; the discharge end of the conveyor belt is provided with a slag discharge pipe for receiving and collecting the oil-containing drill cuttings, the slag discharge pipe extends out of the separation box and is provided with a slag discharge pump; The separation box is provided with two groups of sheet laser beam generators, including a first sheet laser beam generator and a second sheet laser beam generator, the first sheet laser beam generator and the second sheet laser beam generator are respectively located directly above the conveyor belt, and are located at the front and rear sides of the discharge straight pipe along the conveying direction of the conveyor belt, and are placed at an angle of 30° with the vertical square, the light spots emitted by the first sheet laser beam generator and the second sheet laser beam generator are connected, and jointly cover the area of ​​the conveyor belt for receiving oil-containing drill cuttings, and the irradiation thickness of the first sheet laser beam generator and the second sheet laser beam generator matches the thickness of the oil-containing drill cuttings on the conveyor belt; The separation box is provided with a third blower and a fourth blower, the third blower is located at the input side of the conveyor belt, the fourth blower is located at the bottom of the conveyor belt, and the third blower and the fourth blower are both facing the area of ​​the conveyor belt for receiving oil-containing drill cuttings; A plurality of vibrators are arranged below the conveying portion of the conveyor belt. The vibrators include a vibrator body fixedly installed in the separation box and an excitation plate installed on the vibrator body. The excitation plate is attached to the bottom surface of the conveying portion.

2. The laser beam rapid separation device for oil-containing drill cuttings flakes according to claim 1 is characterized in that: The sheet laser beam generator comprises a laser, a spherical mirror group for converging the light spot emitted by the laser into a point light source, and a cylindrical mirror for converting the point light source into a rectangular light spot. The spherical mirror group comprises a plurality of spherical mirrors with different optical focal lengths. Each of the spherical mirrors and the cylindrical mirror is sequentially arranged on the output light path of the laser, and the optical focal length of each of the spherical mirrors increases sequentially along the output light path.

3. The laser beam rapid separation device for oil-containing drill cuttings flakes according to claim 2 is characterized in that: The cross section of the discharge straight pipe is a rectangular structure that matches the shape of the rectangular light spot.

4. The laser beam rapid separation device for oil-containing drill cuttings flakes according to any one of claims 1 to 3, characterized in that: The discharge straight pipe is connected to a first blower and a second blower with adjustable wind speed. The first blower and the second blower are staggered in the vertical direction and blow 120° C. water vapor into the discharge straight pipe in opposite directions.

5. The laser beam rapid separation device for oil-containing drill cuttings flakes according to claim 4 is characterized in that: The exhaust pump is connected to a recovery mechanism for separating and treating oil vapor and water vapor, and the recovery mechanism includes a condenser connected to the outlet of the exhaust pump, the liquid outlet of the condenser is connected to a centrifuge for separating oil and water, and the gas outlet of the condenser is connected to an exhaust gas recovery box for collecting untreated clean exhaust gas.

6. The laser beam rapid separation device for oil-containing drill cuttings flakes according to claim 5, characterized in that: The outlet of the slag discharge pipe is connected to a cooling box for cooling the oil-containing drill cuttings, and the outlet of the cooling box is provided with a detector for detecting the effect of separation of the oil-containing drill cuttings.

7. The laser beam rapid separation device for oil-containing drill cuttings flakes according to claim 6, characterized in that: The outlet of the detector is connected in parallel with a waste residue collection box and a material return pipeline, and the material return pipeline is connected with the material storage mechanism.

8. The laser beam rapid separation device for oil-containing drill cuttings flakes according to claim 7, characterized in that: The material storage mechanism comprises a drill cuttings box, the bottom end of which is connected to the discharge straight pipe, a vertically extending stirring shaft is rotatably arranged in the drill cuttings box, and a stirring blade for evenly stirring the oil-containing drill cuttings is arranged on the stirring shaft.

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