Oil sludge drying and granulating device

Abstract

The invention discloses an oil sludge drying granulation device, and relates to the technical field of oil sludge treatment, the oil sludge drying granulation device comprises a first extrusion roller, a second extrusion roller, a heater and a suction device, the first extrusion roller and the second extrusion roller are oppositely and rotatably arranged, a plurality of first grooves are formed in the roller surface of the first extrusion roller, and a plurality of second grooves are formed in the roller surface of the second extrusion roller; a plurality of first grooves are formed in the roller surface of the first extrusion roller, a plurality of second grooves are formed in the roller surface of the second extrusion roller, the first grooves and the second grooves are correspondingly spliced to form a granulation space during rotation, the heating range of the heater covers the granulation space, and the suction path of the suction equipment covers the granulation space; through opposite rotation of a first extrusion roller and a second extrusion roller, dirty oil sludge is extruded into particles matched with a first groove and a second groove, in the extrusion process, the dirty oil sludge is affected by a heater to evaporate a part of water, meanwhile, steam is pumped out through suction equipment, the environment is kept dry, and the environment is protected. Under the mutual cooperation of extrusion, heating and air suction, the drying effect on the oil sludge can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste oil sludge treatment, in particular to a waste oil sludge drying and granulation device. Background Art

[0002] Oily sludge usually refers to the oily sludge at the bottom of crude oil tanks. It is the solid matter after being processed by horizontal screw centrifuge and disc centrifuge. The water content of this oily sludge is ≤80%, and the oil content is <20%. These oily sludges are usually treated as hazardous waste, but because of the high water content, the treatment cost is increased. Therefore, it is often necessary to further reduce the water content of the oily sludge to reduce the weight and volume of the oily sludge.

[0003] Currently known oily sludge drying equipment includes disc dryers, belt dryers and low-temperature dryers. The working principle of these equipment is to remove the moisture of the oily sludge by secondary heating with steam or drying air. The oily sludge treated by the oily sludge drying equipment usually has a moisture content of ≥40%, and it is difficult to further reduce the moisture content.

[0004] Therefore, people are in urgent need of a waste oil sludge drying and granulation device with good drying effect. Summary of the invention

[0005] The purpose of the present invention is to provide a waste oily sludge drying and granulation device to solve the problems existing in the above-mentioned prior art and to improve the drying effect of the waste oily sludge by combining extrusion, heating and suction.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a waste oily sludge drying and granulation device, comprising a first extrusion roller, a second extrusion roller, a heater and a suction device, the first extrusion roller and the second extrusion roller are arranged to rotate towards each other, a plurality of first grooves are arranged on the roller surface of the first extrusion roller, a plurality of second grooves are arranged on the roller surface of the second extrusion roller, the first grooves and the second grooves are correspondingly spliced ​​during rotation to form a granulation space, the heating range of the heater covers the granulation space, and the suction path of the suction device covers the granulation space.

[0007] Preferably, the waste oily sludge drying and granulation device further comprises a translation mechanism for generating translational motion, wherein the translation mechanism is connected to the rotating shaft of the second squeezing roller, and the translation mechanism drives the second squeezing roller to move toward or away from the first squeezing roller.

[0008] Preferably, the first extrusion roller and the second extrusion roller are respectively connected to the driving device through a rotating shaft, the driving device and the translation mechanism are arranged in a first box body, the roller surface of the first extrusion roller and the roller surface of the second extrusion roller are arranged in a second box body, the second box body is provided with a strip hole for the rotating shaft of the second extrusion roller to translate, the suction port of the suction device is connected to the second box body, the exhaust port of the suction device is connected to the outside, and a granulation outlet is provided at the bottom of the second box body.

[0009] Preferably, the first extrusion roller and the second extrusion roller are both hollow, the first extrusion roller and the second extrusion roller are made of hard heat-conductive material, and the heater is disposed in the inner cavity of the first extrusion roller and the second extrusion roller.

[0010] Preferably, the heater may be detachably provided on the inner peripheral wall of the first extrusion roller or the second extrusion roller.

[0011] Preferably, the rotating shafts of the first squeezing roller and the second squeezing roller are both hollow, and the power supply line of the heater is connected to a controller for controlling the heating temperature through the inner cavity of the rotating shaft.

[0012] Preferably, a feeding mechanism is arranged above the first extrusion roller and the second extrusion roller, and the feeding mechanism includes a screw conveyor. The screw conveyor, the first extrusion roller and the second extrusion roller are parallel to each other. The screw conveyor is arranged corresponding to the middle extrusion part of the first extrusion roller and the second extrusion roller, and a plurality of mud discharge holes are evenly arranged at the bottom of the screw conveyor along the conveying direction.

[0013] Preferably, the feeding mechanism further comprises a feeding hopper, the bottom of which is connected to the feeding port of the screw conveyor.

[0014] Preferably, a stirrer is provided in the feed hopper.

[0015] Preferably, a blade wheel is rotatably provided at the bottom discharge port of the feed hopper or the feed port of the screw conveyor, the blade wheel comprises a rotating shaft and a plurality of blades, and the axis of the rotation path of the blade is perpendicular to the material flow direction.

[0016] Compared with the prior art, the present invention mainly achieves the following technical effects: By the opposite rotation of the first squeezing roller and the second squeezing roller and the setting of the first groove and the second groove, the oily sludge can be squeezed into particles matching the first groove and the second groove. During the squeezing process, the oily sludge will also evaporate part of the water under the influence of the heater, and the suction device will extract the steam to keep the environment dry. The mutual cooperation of squeezing, heating and suction can effectively improve the drying effect of the oily sludge.

[0017] Compared with the prior art, other solutions of the present invention have achieved the following technical effects: After heaters are installed inside the hollow first extrusion roller and the second extrusion roller, the roller surfaces of the first extrusion roller and the second extrusion roller can be kept in a heated state, which can more effectively heat the waste oil sludge when it is extruded, thereby improving the heating and drying effect of the waste oil sludge.

[0018] The arrangement of the screw conveyor and a plurality of mud outlet holes thereon can achieve uniform distribution of materials, improve the uniformity of the falling of the oily sludge, and improve the treatment efficiency of the oily sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic diagram of the structure of the waste oil sludge drying and granulation device in an embodiment of the present invention; Figure 2 It is a right side structural schematic diagram of the waste oil sludge drying and granulation device in an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the first squeezing roller in an embodiment of the present invention; Figure 4 Schematic diagram of the distribution of mud outlet holes of the screw conveyor in the embodiment of the present invention; Among them, 1. the first extrusion roller; 2. the second extrusion roller; 3. the first groove; 4. the second groove; 5. the heater; 6. the suction device; 7. the translation mechanism; 8. the first box body; 9. the second box body; 10. the driving device; 11. the granulation outlet; 12. the screw conveyor; 13. the feed hopper; 14. the agitator; 15. the blade wheel; 16. the mud guard; 17. the controller; 18. the mud outlet hole; 19. the strip hole. DETAILED DESCRIPTION

[0021] 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.

[0022] The purpose of the present invention is to provide a waste oily sludge drying and granulating device to solve the problems existing in the prior art and to improve the drying effect of the waste oily sludge by combining extrusion, heating and air suction.

[0023] 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.

[0024] Please refer to Figures 1 to 4 As shown, a waste oily sludge drying and granulation device is provided, comprising a first squeezing roller 1, a second squeezing roller 2, a heater 5 and a suction device 6. The first squeezing roller 1 and the second squeezing roller 2 are arranged to rotate in opposite directions. A plurality of first grooves 3 are arranged on the roller surface of the first squeezing roller 1, and a plurality of second grooves 4 are arranged on the roller surface of the second squeezing roller 2. The first grooves 3 and the second grooves 4 are correspondingly spliced ​​during rotation to form a granulation space. The heating range of the heater 5 covers the granulation space, and the suction path of the suction device 6 covers the granulation space. Through the opposite rotation of the first squeezing roller 1 and the second squeezing roller 2, in conjunction with the arrangement of the first grooves 3 and the second grooves 4, the waste oily sludge can be squeezed into granules matching the first grooves 3 and the second grooves 4. During the squeezing process, the waste oily sludge will also be affected by the heater 5 to evaporate a portion of water. At the same time, the suction device 6 extracts the steam to keep the environment dry. Under the mutual cooperation of squeezing, heating and suction, the drying effect of the waste oily sludge can be effectively improved.

[0025] In this embodiment, the suction device 6 is a vacuum pump.

[0026] In this embodiment, the granulation space formed by the corresponding splicing of the first groove 3 and the second groove 4 during rotation is similar to the capsule shape of the hemispherical bodies at both ends of the middle cylinder. The granular oily sludge pressed by the two is similar to the shape of a capsule. The capsule-shaped oily sludge is a strip structure with a small diameter, which facilitates the heat to fully enter the interior of the granular oily sludge. In other embodiments, the first groove 3 and the second groove 4 can also be selected from hemispherical grooves or rectangular grooves.

[0027] The waste oil sludge drying and granulation device also includes a translation mechanism 7 for generating translational motion. In this embodiment, the translation mechanism 7 uses a hydraulic telescopic rod. In other embodiments, an electric or pneumatic telescopic rod can also be used. The translation mechanism 7 is connected to the rotating shaft of the second extrusion roller 2. The connection method can be: a bearing is set at the end of the translation mechanism 7, and the translation mechanism 7 is rotatably connected to the rotating shaft through the bearing, so that the translation mechanism 7 does not affect the normal rotation of the second extrusion roller 2, and only drives the second extrusion roller 2 to translate. The translation mechanism 7 drives the second extrusion roller 2 to move toward or away from the first extrusion roller 1, thereby adjusting the extrusion gap size and extrusion pressure size between the first extrusion roller 1 and the second extrusion roller 2.

[0028] The first extrusion roller 1 and the second extrusion roller 2 are respectively connected to the driving device 10 through a rotating shaft. The driving device 10 uses a power output mechanism composed of a motor and a reducer. The driving device 10 and the translation mechanism 7 are arranged in the first box body 8. The roller surface of the first extrusion roller 1 and the roller surface of the second extrusion roller 2 are arranged in the second box body 9. The first box body 8 and the second box body 9 both provide protection for the internal structure. A strip hole 19 is opened on the second box body 9 for the rotation axis of the second extrusion roller 2 to translate. The strip hole 19 is parallel to the translation direction of the second extrusion roller 2. The suction port of the suction device 6 is connected to the second box body 9, and the exhaust port of the suction device 6 is connected to the outside. Preferably, the suction port of the suction device 6 is arranged on the side wall of the second box body 9 away from the strip hole 19, and the first extrusion roller 1 is located in the space between the strip hole 19 and the suction port, so that the airflow can better carry the evaporated steam. A granulation outlet 11 is arranged at the bottom of the second box body 9, and a valve is arranged at the granulation outlet 11 for easy discharge after granulation.

[0029] The first box body 8 and the second box body 9 are arranged on the bracket to provide a receiving space at the bottom for receiving the dried oily sludge.

[0030] In this embodiment, the first extrusion roller 1 and the second extrusion roller 2 are both hollow, and the material of the first extrusion roller 1 and the second extrusion roller 2 is a hard heat-conducting material, such as iron. A heater 5 is provided in the inner cavity of the first extrusion roller 1 and the second extrusion roller 2. After the heater 5 is installed inside the hollow first extrusion roller 1 and the second extrusion roller 2, it can be ensured that the roller surface of the first extrusion roller 1 and the roller surface of the second extrusion roller 2 are in a heated state, and the waste oil sludge can be heated more effectively when it is extruded, thereby improving the heating and drying effect of the waste oil sludge.

[0031] In order to further improve the heating effect on the roller surfaces of the first extrusion roller 1 and the second extrusion roller 2, a heater 5 can be detachably provided on the inner peripheral wall of the first extrusion roller 1 or the second extrusion roller 2, that is, the heater 5 is directly provided on the inner wall surface, and the detachable manner is a snap connection or a bolt connection.

[0032] On the basis that the heater 5 is arranged in the first squeezing roller 1 and the second squeezing roller 2, the rotating shafts of the first squeezing roller 1 and the second squeezing roller 2 are both hollow, and the power supply line of the heater 5 is connected to the controller 17 for controlling the heating temperature through the inner cavity of the rotating shaft.

[0033] The heater 5 in this embodiment is an electromagnetic induction heating belt, and other types of heaters 5 may also be used in other embodiments.

[0034] A feeding mechanism is arranged above the first extrusion roller 1 and the second extrusion roller 2, and the feeding mechanism includes a screw conveyor 12. The screw conveyor 12, the first extrusion roller 1 and the second extrusion roller 2 are parallel to each other. The screw conveyor 12 is arranged corresponding to the middle extrusion part of the first extrusion roller 1 and the second extrusion roller 2. A plurality of mud outlet holes 18 are evenly arranged at the bottom of the screw conveyor 12 along the conveying direction. The arrangement of the plurality of mud outlet holes 18 can achieve uniform distribution, improve the uniformity of the falling of the waste oily sludge, and improve the treatment efficiency of the waste oily sludge. In this embodiment, the port of the screw conveyor 12 is in a closed state, and the waste oily sludge can only be squeezed out from the mud outlet holes 18.

[0035] An inverted frustum-shaped mud guard 16 may be provided below the screw conveyor 12 to guide the oily sludge to between the first squeeze roller 1 and the second squeeze roller 2 .

[0036] In order to realize convenient feeding, a feeding hopper 13 is additionally provided, and the bottom of the feeding hopper 13 is connected to the feeding port of the screw conveyor 12 .

[0037] A stirrer 14 is provided in the feed hopper 13 to ensure the uniformity of the oily sludge.

[0038] A blade wheel 15 is rotatably provided at the bottom discharge port of the feed hopper 13 or the feed port of the screw conveyor 12. The blade wheel 15 includes a rotating shaft and a plurality of blades. The axis of the rotation path of the blade is perpendicular to the material flow direction. The oily sludge is pushed into the screw conveyor 12 by the pushing action of the blade.

[0039] The screw conveyor 12, the agitator 14 and the impeller 15 are all driven by motors, and the controller 17 can also control the rotation speed of the first squeezing roller 1, the rotation speed of the second squeezing roller 2, the movement of the translation mechanism 7, the suction power of the suction device 6, and the motor speeds of the screw conveyor 12, the agitator 14 and the impeller 15.

[0040] In actual use, after the oily sludge enters the feed hopper 13, it is stirred by the stirrer 14 and conveyed by the impeller 15 before entering the screw conveyor 12. The screw conveyor 12 evenly feeds the oily sludge between the first extrusion roller 1 and the second extrusion roller 2. The first extrusion roller 1 and the second extrusion roller 2 rotate in opposite directions and use the first groove 3 and the second groove 4 to extrude the oily sludge into particles. During the extrusion process, the heater 5 heats the oily sludge through the roller surface of the first extrusion roller 1 and the second extrusion roller 2 to evaporate the water in the oily sludge, and the evaporated steam is sucked away and discharged by the suction device 6.

[0041] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0042] 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 essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, 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.

[0043] 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 device for drying and granulating waste oil sludge, characterized in that: The invention comprises a first squeezing roller, a second squeezing roller, a heater and a suction device, wherein the first squeezing roller and the second squeezing roller are arranged to rotate toward each other, a plurality of first grooves are arranged on the roller surface of the first squeezing roller, a plurality of second grooves are arranged on the roller surface of the second squeezing roller, the first grooves and the second grooves are correspondingly spliced ​​during rotation to form a granulation space, the heating range of the heater covers the granulation space, and the suction path of the suction device covers the granulation space; The waste oily sludge drying and granulation device further comprises a translation mechanism for generating translational motion, wherein the translation mechanism is connected to the rotating shaft of the second squeezing roller, and the translation mechanism drives the second squeezing roller to move toward or away from the first squeezing roller.

2. The waste oil sludge drying and granulation device according to claim 1, characterized in that: The first extrusion roller and the second extrusion roller are respectively connected to the driving device through a rotating shaft, the driving device and the translation mechanism are arranged in a first box body, the roller surface of the first extrusion roller and the roller surface of the second extrusion roller are arranged in a second box body, the second box body is provided with a strip hole for the rotation shaft of the second extrusion roller to translate, the suction port of the suction device is connected to the second box body, the exhaust port of the suction device is connected to the outside, and the bottom of the second box body is provided with a granulation outlet.

3. The waste oil sludge drying and granulation device according to claim 1, characterized in that: The first extrusion roller and the second extrusion roller are both hollow, the first extrusion roller and the second extrusion roller are made of hard heat-conducting material, and the heater is disposed in the inner cavity of the first extrusion roller and the second extrusion roller.

4. The waste oil sludge drying and granulation device according to claim 3 is characterized in that: The heater may be detachably provided on the inner peripheral wall of the first extrusion roller or the second extrusion roller.

5. The waste oil sludge drying and granulation device according to claim 4, characterized in that: The rotating shafts of the first squeezing roller and the second squeezing roller are both hollow, and the power supply line of the heater is connected to a controller for controlling the heating temperature through the inner cavity of the rotating shaft.

6. The waste oil sludge drying and granulation device according to claim 1, characterized in that: A feeding mechanism is arranged above the first extrusion roller and the second extrusion roller, and the feeding mechanism includes a screw conveyor. The screw conveyor, the first extrusion roller and the second extrusion roller are parallel to each other. The screw conveyor is arranged corresponding to the middle extrusion part of the first extrusion roller and the second extrusion roller, and a plurality of mud discharge holes are evenly arranged at the bottom of the screw conveyor along the conveying direction.

7. The waste oil sludge drying and granulation device according to claim 6, characterized in that: The feeding mechanism further comprises a feeding hopper, the bottom of which is communicated with the feeding port of the screw conveyor.

8. The device for drying and granulating waste oil sludge according to claim 7, characterized in that: A stirrer is arranged in the feeding hopper.

9. The waste oil sludge drying and granulation device according to claim 7, characterized in that: A blade wheel is rotatably arranged at the bottom discharge port of the feed hopper or the feed port of the screw conveyor. The blade wheel comprises a rotating shaft and a plurality of blades. The axis of the rotation path of the blade is perpendicular to the material flow direction.

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