Continuous separation device for oil residue-containing wastewater in rare earth production process

Abstract

The utility model discloses a continuous separation device for oil residue-containing wastewater in a rare earth production process, which comprises a shunting pool, a Dole clarifying barrel, a horizontal screw centrifuge and a disc centrifuge, the shunting pool comprises a shunting pool body and an oil residue scraper, the shunting pool body is of a box body structure with an opening at the top, a track is arranged at the top of the shunting pool body, and the oil residue scraper is arranged at the bottom of the shunting pool body. An oil residue scraper is mounted on the track; the shunting pool body is provided with an oil collecting groove, a shunting pool oil discharging opening, a shunting pool water discharging opening, a slag collecting groove and a shunting pool slag discharging opening; the shunting pool oil discharging opening and the shunting pool slag discharging opening are respectively provided with a conveying pump and a control valve; an oil discharge port of the shunting pool is connected with a material inlet of the disc centrifuge through a pipeline, and a slag discharge port of the shunting pool is connected with a material inlet of the Dole clarifying barrel through a pipeline. According to the utility model, continuous oil-water-slag separation of the sulfuric acid rare earth transformation wastewater can be realized, so that the pretreatment efficiency of the rare earth transformation wastewater is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rare earth hydrometallurgy technical field, concretely relates to a kind of continuous separation device of oil residue-containing wastewater in rare earth production process. BACKGROUND

[0002] In the production of rare earth, different elements are separated in each stage, especially in the process of separating impurity elements and rare earth elements, due to entrainment, chemical reaction, etc. The wastewater produced in the extraction process contains oil, emulsions and slag. For example, in the calcium salt and magnesium salt wastewater produced by the saponification system using solid saponification agent, in addition to organic matter, there is also a large amount of calcium slag and magnesium slag wrapped in organic matter, causing organic loss, and at the same time, bringing difficulty to the next step of wastewater treatment. The current industry transformation wastewater treatment basically adopts the process route of ordinary oil separation tank, aeration stirring and sedimentation, and manual oil recovery, which cannot realize continuous oil-water-slag separation, and the multi-step separation process is complex, labor intensive, and the recovery rate of organic matter is low, especially the loss of organic matter in the slag is large.

[0003] Publication No. CN106145443A discloses a treatment method for rare earth production wastewater, comprising the following steps: (1) passing the rare earth production wastewater into a sedimentation tank, and passing the supernatant through an impurity filter to remove particulate impurities; (2) adding a mixture of sodium carbonate and sodium bicarbonate to the wastewater after removing impurities to precipitate rare earth elements, separating solid and liquid, and adding hydrochloric acid to the solid phase to obtain chlorinated rare earth; (3) passing the liquid phase separated in step (2) into a sedimentation tank, adding alkali to the sedimentation tank to adjust the pH value to 10-13, and after standing, the wastewater is introduced into an intermediate water tank by overflow, and the wastewater in the intermediate water tank is extracted into an ammonia gas stripper by a lifting pump, the ammonia nitrogen in the ammonia gas stripper is converted into ammonia gas, and the ammonia gas is extracted into a gas-liquid separator by a vacuum pump; the drainage after treatment by the ammonia gas stripper is detected, and when the ammonia nitrogen meets the standard, it is directly discharged through a drainage pipe. The application uses a sedimentation tank + filter to remove impurities, uses alkali precipitation, and uses a stripping device to remove ammonia nitrogen, to finally realize industrialized utilization of wastewater. The whole process is intermittent operation, and cannot be continuously and automatically operated.

[0004] The application discloses a rare earth production wastewater treatment method and system, and the rare earth production wastewater is preliminarily purified through pretreatment, and then the organic components of the wastewater are degraded and treated through a catalytic oxidation device; the wastewater sequentially enters an ultrafiltration device and an ion exchanger for final purification; after purification, the wastewater is separated and purified in a nanofiltration device, the nanofiltration concentrated water is returned to an efficient sedimentation tank for treatment, the nanofiltration water is introduced into a bipolar membrane electrodialysis device to generate a hydrochloric acid solution, a sodium hydroxide solution and a dilute solution; the dilute solution is concentrated through a reverse osmosis device, and the reverse osmosis concentrated water is introduced into the nanofiltration water; finally, the hydrochloric acid solution is concentrated and thickened after treatment, and is used for extraction separation in rare earth production; and part of the sodium hydroxide solution is used for saponification production, and the remaining part of the sodium hydroxide solution is used to prepare a sodium carbonate solution. The application degrades the organic components of the wastewater through the catalytic oxidation device, the wastewater sequentially enters the ultrafiltration device and the ion exchanger for final purification, and the organic content in the wastewater is reduced, but the recycling of the organic in the wastewater is not realized, and the valuable resources are decomposed. Utility model content

[0005] The utility model discloses a kind of continuous separation devices of oil residue-containing wastewater in rare earth production process, can realize the continuous oil-water-slag separation of rare earth transformation wastewater, to improve rare earth transformation wastewater pretreatment efficiency.

[0006] Technical scheme is as follows:

[0007] The continuous separation device of oil residue-containing wastewater in rare earth production process, comprising: a flow splitter, a dorr clarifying barrel, a horizontal screw centrifuge, a disc centrifuge, the flow splitter is used for sedimentation separation transformation wastewater, comprising: flow splitter body, oil residue scraper, the flow splitter body is the box structure of top opening, the top of flow splitter body is provided with rail, and oil residue scraper is installed on rail;Oil collection groove and residue collection groove are arranged on the right side in the flow splitter body, and flow splitter oil outlet, flow splitter water outlet and flow splitter residue outlet are arranged on the right side of flow splitter body, oil collection groove is located on the upper portion of flow splitter water outlet, and the bottom and both ends of oil collection groove are connected to the inner wall of flow splitter body respectively, residue collection groove is located at the bottom of flow splitter body, flow splitter oil outlet is located above the bottom of oil collection groove, and flow splitter oil outlet and flow splitter residue outlet are respectively provided with delivery pump and control valve;The material inlet of disc centrifuge is connected to the flow splitter oil outlet of flow splitter by pipeline, and the material inlet of dorr clarifying barrel is connected to the flow splitter residue outlet of flow splitter by pipeline.

[0008] Further, the flow splitter water outlet is connected to the top opening of flow splitter body by pipeline, and the flow splitter water outlet is provided with delivery pump and control valve.

[0009] Further, the oil residue scraper comprises a fixed support, traveling wheels, a first adjusting motor, a second adjusting motor, a rotating support, the fixed support is connected with a plurality of traveling wheels, the traveling wheels are located on a track, and the traveling wheels are provided with a traveling motor; the first adjusting motor and the second adjusting motor are fixed on the upper portion of the fixed support; the rotating support comprises a connecting frame, a long arm frame, a lower scraper, a long connecting arm, a short arm frame, an upper scraper and a short connecting arm; the top of the connecting frame is connected to the bottom right side of the fixed support, the top of the long arm frame is hinged to the bottom of the connecting frame, and the lower scraper is connected to the bottom end of the long arm frame; the lower portion of the long connecting arm is hinged to the middle portion of the long arm frame, and the long connecting arm is located on the left side of the long arm frame; one end of the pull rope is connected to the upper portion of the long connecting arm, and the other end of the pull rope is connected to the rotating shaft of the first adjusting motor; the right side of the short arm frame is hinged to the upper portion of the long arm frame, the upper scraper is connected to the left side of the short arm frame, and the short arm frame is located on the left side of the long arm frame; the bottom end of the short connecting arm is hinged to the middle portion of the short arm frame, and the short connecting arm is located on the upper portion of the short arm frame; one end of the pull rope is connected to the top of the short connecting arm, and the other end of the pull rope is connected to the rotating shaft of the second adjusting motor.

[0010] Further, the connecting frame, the long arm frame, the lower scraper, the short arm frame and the fixed support are rectangular in shape.

[0011] Further, the hinge positions of the short arm frame and the long arm frame are located on the upper portions of the hinge positions of the short arm frame and the long arm frame.

[0012] Further, the Dorr clarifying tank comprises a clarifying tank body, a central tank and a rake, the clarifying tank body is in a closed structure, the central tank and the rake are located inside the clarifying tank body, the central tank is located on the upper portion of the rake, the top of the central tank is connected below the top of the clarifying tank body, and a material inlet arranged on the top of the Dorr clarifying tank is located on the inner side of the central tank; an overflow groove is arranged on the upper portion of the inner wall of the clarifying tank body, a clarified liquid outlet is arranged on the side wall of the clarifying tank body, and the clarified liquid outlet is communicated with the overflow groove; a stirring motor is arranged on the top of the clarifying tank body, and connecting shafts are connected to the rotating shafts of the stirring motor and the rake at both ends; a clarifying tank residue discharge port is arranged on the bottom of the clarifying tank body, the clarifying tank residue discharge port is connected to a material inlet of a horizontal screw centrifuge through a pipeline, and the clarifying tank residue discharge port is provided with a conveying pump and a control valve.

[0013] The technical effects of the present application include:

[0014] The present application can realize continuous oil-water-residue separation of rare earth sulfate transformation wastewater, improve the pretreatment efficiency of rare earth transformation wastewater, reduce the labor intensity of workers, recycle and utilize the organic matter, improve the impurity content of the residue, and improve the wastewater quality after pretreatment to facilitate the next step of treatment.

[0015] The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment.

[0016] The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment.

[0017] The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment.

[0018] The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment. 3 / h, the solid content in the raw water is 5%, the oil content is 1050mg / L, the water treatment capacity of the disc centrifuge is 1m 3 / h, and the residue output of the horizontal screw centrifuge is 0.2t / h.

[0019] Name Oil content Water content Remarks Water phase after treatment 32 ppm —— Water phase mixed with water phase from the disc centrifuge and the flow splitter Residue before treatment 5.35％ —— —— Residue after treatment 3.34％ 34.2％ Residue discharge port of the decanter centrifuge

[0020] After continuous operation for 30 days, the total water treatment capacity is 2880m 3 , the organic recovery amount is 95.6kg / day, the monthly recovery amount is 2868kg, the standard conversion is 717kg, the organic price is about 50000 / t, and the recovered organic value is 35850 yuan. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment.

[0022] Figure 2 The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment. DETAILED DESCRIPTION

[0023] The following description fully illustrates the specific implementation scheme of the utility model to enable the skilled in the art to practice and reproduce.

[0024] As Figure 1 The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment.

[0025] The utility model discloses a water-oil-residue separation device for rare earth sulfate transformation wastewater, which belongs to the field of wastewater treatment.

[0026] The preliminary oil, water and residue sediment separation of the rare earth sulfate transformation wastewater is carried out in the flow distribution tank 1, the transformation wastewater is pumped to the flow distribution tank 1, the flow distribution tank 1 realizes the preliminary separation of the oil, water and residue by using the different densities of the oil, water and residue, the high oil content wastewater and the high solid content wastewater are separated, the water inflow of the secondary separation is greatly reduced, and the flow distribution tank 1 simultaneously has the functions of the buffering and transferring of the transformation wastewater.

[0027] The flow distribution tank 1 separates the solid particles and the liquid by using the gravity sedimentation method, and the structure comprises a flow distribution tank body 11 and an oil residue scraper 12.

[0028] The flow distribution tank body 11 is provided with a track 111 at the top, and the oil residue scraper 12 is installed on the track 111 at the top of the flow distribution tank body 11.

[0029] The flow distribution tank body 11 is provided with an oil collecting groove 112 and a residue collecting groove 115 on the right side, and is provided with a flow distribution tank oil outlet 113, a flow distribution tank water outlet 114 and a flow distribution tank residue outlet 116 on the right side.

[0030] As shown in Figure 2 The structure principle diagram of the oil residue scraper 12 in the utility model.

[0031] The oil residue scraper 12 comprises a fixed support 1201, a travelling wheel 1202, a first adjusting motor 1203, a second adjusting motor 1204 and a rotating support 1205.

[0032] The rotating shafts of the two travelling wheels 1202 are connected to the fixed support 1201, the travelling wheel 1202 is located on the track 111, and the travelling wheel 1202 is provided with a travelling motor.

[0033] The rotating support 1205 comprises a connecting frame 1206, a long arm frame 1207, a lower scraper 1208, a long connecting arm 1209, a short arm frame 1210, an upper scraper 1211, and a short connecting arm 1212. The top of the connecting frame 1206 is connected to the bottom right side of the fixed support 1201, the top of the long arm frame 1207 is hingedly connected to the bottom of the connecting frame 1206, the lower scraper 1208 is connected to the bottom end of the long arm frame 1207, and the lower scraper 1208 is located on the left side of the long arm frame 1207. The lower part of the long connecting arm 1209 is hingedly connected to the middle part of the long arm frame 1207, and the long connecting arm 1209 is located on the left side of the long arm frame 1207. One end of the pull rope is connected to the upper part of the long connecting arm 1209, and the other end is connected to the rotating shaft of the first adjusting motor 1203. The right side of the short arm frame 1210 is hingedly connected to the upper part of the long arm frame 1207, the upper scraper 1211 is connected to the left side of the short arm frame 1210, and the short arm frame 1210 is located on the left side of the long arm frame 1207. The bottom end of the short connecting arm 1212 is hingedly connected to the middle part of the short arm frame 1210, and the short connecting arm 1212 is located on the upper part of the short arm frame 1210. One end of the pull rope is connected to the top of the short connecting arm 1212, and the other end is connected to the rotating shaft of the second adjusting motor 1204.

[0034] The first adjusting motor 1203 rotates to retract the pull rope, the long connecting arm 1209 pulls the long arm frame 1207 to rotate, and the horizontal height of the lower scraper 1208 moves upward, and vice versa. The horizontal height of the lower scraper 1208 moves downward. The second adjusting motor 1204 rotates to retract the pull rope, the short connecting arm 1212 drives the short arm frame 1210 to rotate, and the horizontal height of the upper scraper 1211 moves upward, and vice versa. The horizontal height of the upper scraper 1211 moves downward.

[0035] The traveling wheel 1202 drives the oil residue scraper 12 to move transversely on the track 111, thereby realizing the overall movement of the oil residue scraper 12 and the movement of the settled residue and the oil phase. The settled residue at the bottom of the settling tank body 11 is moved by the lower scraper 1208 to be collected into the residue collecting groove 115 and is output through the residue discharge port 116 by a conveying pump. The oil phase floating on the upper part of the wastewater is moved by the upper scraper 1211 to be collected into the oil collecting groove 112 and is output by a conveying pump. The middle layer of effluent is reused or enters the next processing procedure according to process requirements.

[0036] The connecting frame 1206, the long arm frame 1207, the lower scraper 1208, the short arm frame 1210, and the fixed support 1201 are rectangular in shape. The hinged positions of the short arm frame 1210 and the long arm frame 1207 are located on the upper part of the hinged positions of the short arm frame 1210 and the long arm frame 1207.

[0037] The connecting frame 1206, the long arm frame 1207, the lower scraper 1208, the long connecting arm 1209, the short arm frame 1210, the upper scraper 1211, and the short connecting arm 1212 are subjected to corrosion prevention treatment to avoid corrosion by the rare earth sulfate transformation wastewater.

[0038] The Dorr clarifier 2 comprises a clarifier body 21, a central tank 22 and a rake 23. The clarifier body 21 is a closed structure, the central tank 22 and the rake 23 are located inside the clarifier body 21, the central tank 22 is located above the rake 23, the top of the central tank 22 is connected below the top of the clarifier body 21, an overflow groove 24 is arranged above the inner wall of the clarifier body 21, a clarified liquid outlet 25 is arranged on the side wall of the clarifier body 21, and the clarified liquid outlet 25 is communicated with the overflow groove 24; a stirring motor 27 is arranged above the top of the clarifier body 21, and a connecting shaft 26 is connected with the rotating shaft of the stirring motor 27 and the rake 23 at both ends; a clarifier residue discharge port 28 is arranged at the bottom of the clarifier body 21, and the clarifier residue discharge port 28 is connected with the material inlet of the horizontal screw centrifuge 3 through a pipeline. The clarifier residue discharge port 28 is provided with a conveying pump and a control valve, and the material inlet of the Dorr clarifier 2 is located inside the central tank 22. The Dorr clarifier 2 receives the high solid content sediment residue from the diversion tank 1, separates the residue and wastewater by using the principle of gravity sedimentation, the separated water phase is transported to a wastewater treatment process or to the diversion tank body 11 for reuse through a pipeline, and the sediment residue is transported to the horizontal screw centrifuge 3 through a pipeline.

[0039] The horizontal screw centrifuge 3 is a horizontal screw unloading and continuous operation sedimentation equipment, which is internally provided with a drum and a material conveying screw inner cylinder, and is externally provided with a residue discharge port 31, a liquid discharge port 32 and a material inlet. The liquid discharge port 32 is connected with the material inlet of the disc centrifuge 4 through a pipeline. The material inlet of the horizontal screw centrifuge 3 is connected with the internal material conveying screw inner cylinder. The working principle is that the drum and the screw rotate at a certain differential speed in the same direction at a high speed, the material is continuously introduced into the material conveying screw inner cylinder through a feeding pipe, and then enters the drum after acceleration, under the action of the centrifugal force field, the heavier solid phase deposits on the drum wall to form a sediment layer. The material conveying screw inner cylinder continuously pushes the deposited solid phase to the conical end of the drum, and then discharges outside the machine through the residue discharge port 31. The lighter liquid phase forms an inner liquid ring, which continuously overflows the drum through the overflow port at the large end of the drum, and then is discharged through the liquid discharge port 32 and transported to the disc centrifuge 4. The horizontal screw centrifuge 3 can continuously feed, separate, wash and unload under full-speed operation. The horizontal screw centrifuge 3 receives the slurry from the Dorr clarifier 2, separates the water and oil in the slurry through the high-speed rotating drum and material conveying screw inner cylinder, so as to obtain residue with low water and oil content.

[0040] The disc centrifuge 4 is a vertical centrifuge, the drum is arranged on the upper end of the vertical shaft and is driven to rotate at a high speed by the motor through a transmission device. The drum is internally provided with a group of mutually nested disc plates. The disc centrifuge 4 receives the liquid phase from the diversion tank 1 and the horizontal screw centrifuge 3, realizes liquid-liquid separation by using centrifugal force, the separated oil phase is reused in the extraction process, and the separated water phase is transported to a wastewater treatment process or to the diversion tank body 11 for reuse through a pipeline.

[0041] Through the combination of the above-mentioned equipment, the oil and slag in the waste water containing solid and oil can be removed efficiently, continuously, purely, physically, and automatically, the organic matter entrained in the water and slag is recovered, the waste water quality is optimized, and the waste water pretreatment cost is reduced.

[0042] The continuous separation method of oil, water and slag in the transformation wastewater of rare earth sulfate is as follows:

[0043] Step 1: The transformation wastewater enters the diversion pool 1, and the oil phase, water phase and sedimentation slag are separated under the action of gravity. The pipeline connected with the oil outlet 113 of the diversion pool transports the separated oil phase to the disc centrifuge 4. The pipeline connected with the water outlet 114 of the diversion pool transports the separated water phase to the waste water treatment process or to the diversion pool body 11 for reuse. The pipeline connected with the slag outlet 116 of the diversion pool transports the separated slag to the Dorr clarifying barrel 2.

[0044] The control valves of the oil outlet 113, the water outlet 114 and the slag outlet 116 of the diversion pool are opened, and the delivery pump is started to transport the oil phase, the water phase and the sedimentation slag.

[0045] Step 11: After the transformation wastewater enters the diversion pool 1, the traveling motor is started, the traveling wheel 1202 drives the oil and slag scraper 12 to move to the left side of the diversion pool 1, and the traveling motor stops when the oil and slag scraper 12 reaches the set position.

[0046] Step 12: The first adjusting motor 1203 is started, the long connecting arm 1209 is pulled through the pull rope, the long arm frame 1207 is rotated by the long connecting arm 1209, and the horizontal height of the lower scraper 1208 is adjusted to the bottom of the diversion pool 1. The second adjusting motor 1204 is started, the short connecting arm 1212 is pulled through the pull rope, the short arm frame 1210 is rotated by the short connecting arm 1212, and the horizontal height of the upper scraper 1211 is adjusted to the height of the oil phase floating on the upper part of the transformation wastewater.

[0047] Step 13: The traveling motor is started, the traveling wheel 1202 drives the oil and slag scraper 12 to move to the right side, and the traveling motor stops when the oil and slag scraper 12 reaches the set position. During the movement of the oil and slag scraper 12 to the right side, the lower scraper 1208 pushes the sedimentation slag deposited at the bottom of the diversion pool 1 to the right side, and the sedimentation slag enters the slag collecting groove 115. The upper scraper 1211 pushes the oil phase to the right side, and the oil phase enters the oil collecting groove 112.

[0048] Step 2: The slag liquid containing sedimentation slag and transformation wastewater from the diversion pool 1 enters the Dorr clarifying barrel 2 from the top for secondary water-slag separation. The water phase is discharged from the clarified liquid outlet 25, and the sedimentation slag is transported to the horizontal screw centrifuge 3 through the pipeline.

[0049] In the dorr clarifying tank 2, the stirring motor 27 drives the rake 23 to rotate, the precipitated sludge settled at the bottom is thickened by the rake 23 and collected at the bottom of the clarifying tank discharge port 28, and the precipitated sludge is output to the horizontal screw centrifuge 3 through a pipeline.

[0050] Step 3: The horizontal screw centrifuge 3 rotates at high speed to separate the solid and liquid of the precipitated sludge by centrifugal force, and the liquid phase mixed with water phase and oil phase is discharged into the disc centrifuge 4.

[0051] The horizontal screw centrifuge 3 realizes solid-liquid separation by high-speed centrifugal force, and the sludge is collected and discharged automatically by the screw pushing component, and in this process, the oil phase wrapped in the precipitated sludge enters the water phase, and the liquid phase mixed with water phase and oil phase is discharged to the disc centrifuge 4 for secondary separation.

[0052] Step 4: The disc centrifuge 4 separates the oil phase from the flow pool 1 and the liquid phase from the horizontal screw centrifuge 3, and discharges.

[0053] The oil-water mixed phase (liquid phase) from the upper layer of the flow pool 1 and the liquid phase from the horizontal screw centrifuge 3 are jointly introduced into the disc centrifuge 4, the oil-water mixed phase flows through the disc gap to realize rapid oil-water separation, and the oil phase and the water phase are discharged from the respective outlets, the oil phase is recycled in the production process, and the water phase is recycled or introduced into the next process according to the process requirement.

[0054] The terms used in the utility model are illustrative and non-limiting terms. Since the utility model can be embodied in various forms without departing from the spirit or essence of the technical scheme, it should be understood that the above examples are not limited to any of the above details, but should be interpreted broadly within the spirit and scope of the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A continuous separation device for oil residue wastewater in a rare earth production process, characterized in that, The application relates to a clarifier, a disc centrifuge and a decanter centrifuge. The application relates to a clarifier, a disc centrifuge and a decanter centrifuge.

2. The apparatus for continuous separation of oil sludge waste water in the rare earth production process according to claim 1, characterized in that, The oil residue scraper comprises a fixed support, travelling wheels, a first adjusting motor, a second adjusting motor, a rotating support, a plurality of travelling wheels are connected to the fixed support, the travelling wheels are located on the track, and the travelling wheels are provided with travelling motors; the first adjusting motor and the second adjusting motor are fixed to the upper portion of the fixed support; the rotating support comprises a connecting frame, a long arm frame, a lower scraper, a long connecting arm, a short arm frame, an upper scraper and a short connecting arm; the top of the connecting frame is connected to the bottom right side of the fixed support, the top of the long arm frame is hingedly connected to the bottom of the connecting frame, and the lower scraper is connected to the bottom end of the long arm frame; the lower portion of the long connecting arm is hingedly connected to the middle portion of the long arm frame, and the long connecting arm is located on the left side of the long arm frame; one end of a pull rope is connected to the upper portion of the long connecting arm, and the other end of the pull rope is connected to the rotating shaft of the first adjusting motor; the right side of the short arm frame is hingedly connected to the upper portion of the long arm frame, the upper scraper is connected to the left side of the short arm frame, and the short arm frame is located on the left side of the long arm frame; the bottom end of the short connecting arm is hingedly connected to the middle portion of the short arm frame, and the short connecting arm is located on the upper portion of the short arm frame; one end of a pull rope is connected to the top of the short connecting arm, and the other end of the pull rope is connected to the rotating shaft of the second adjusting motor.

3. The apparatus for continuous separation of oil sludge waste water in the rare earth production process according to claim 1, characterized in that, The connecting frame, the long arm frame, the lower scraper, the short arm frame and the fixed support are rectangular in shape.

4. The apparatus for continuous separation of oil sludge waste water in the rare earth production process according to claim 3, characterized in that, The hinged positions of the short arm frame and the long arm frame are located on the upper portions of the hinged positions of the short arm frame and the long arm frame.

5. The apparatus for continuous separation of oil sludge waste water in the rare earth production process according to claim 3, characterized in that, The application relates to a clarifier, a disc centrifuge and a decanter centrifuge.

6. The apparatus for continuous separation of oil sludge waste water in the rare earth production process according to claim 1, characterized in that, The application relates to a clarifier, a disc centrifuge and a decanter centrifuge.

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