Middle and low rank coal organic matter fractional extraction device and method

Abstract

The invention relates to the technical field of extraction devices, in particular to a medium-and-low-rank coal organic matter grading extraction device and method.The medium-and-low-rank coal organic matter grading extraction device comprises a grading screen mechanism, the grading screen mechanism comprises two vertical plates, and three annular plates are jointly and fixedly connected between the two vertical plates from top to bottom in sequence; a first filter screen, a second filter screen and a third filter screen are fixedly mounted at the bottoms of the three annular plates correspondingly, the number of filter screens of the first filter screen, the second filter screen and the third filter screen is increased in sequence, and the first filter screen, the second filter screen and the third filter screen are all in a shape of being concave towards the middle. And the fractional extraction mechanism comprises bottom plates, and the bottom plates are fixedly mounted at the bottoms of the two vertical plates. According to the device, medium-and-low-rank coal can be efficiently classified into medium-and-low-rank coal with various crushing degrees, then the medium-and-low-rank coal can safely and stably enter extract liquor, the extract liquor is efficiently extracted, and the manufacturing cost and the maintenance cost of the device are relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of extraction devices, and in particular to a device and method for graded extraction of organic matter from medium- and low-rank coals. Background Art

[0002] Extraction, also known as solvent extraction or liquid-liquid extraction, is a unit operation that uses the different solubility of components in the system in the solvent to separate the mixture. That is, it is a method of transferring the solute from one solvent to another solvent by using the difference in solubility or distribution coefficient of the substance in two immiscible (or slightly soluble) solvents. After repeated extractions, most of the compounds are extracted.

[0003] Generally, when extracting medium and low-rank coal, the medium and low-rank coal is first crushed and then put into the extraction liquid for extraction. However, due to the different crushing degrees, the extraction efficiency is low and the effect is average.

[0004] To this end, we designed a graded extraction device to grade and extract low- and medium-rank coal with different degrees of crushing.

[0005] After screening the medium and low-rank coal with different crushing degrees, the general device needs to collect them and then pour them into the extraction liquid, which is obviously troublesome. And in the subsequent extraction, stirring is also required to make the extraction speed faster.

[0006] In order to improve operating efficiency, we have launched a medium and low-rank coal organic matter grading extraction device and method, which can efficiently grade the medium and low-rank coal into medium and low-rank coal of various degrees of crushing, and then allow it to enter the extraction liquid safely and stably, and enable the extraction liquid to perform extraction operations efficiently, with relatively low construction and maintenance costs. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art. The present invention proposes a device and method for grading and extracting organic matter from medium and low-rank coal, which can efficiently grade medium and low-rank coal into medium and low-rank coal of various degrees of crushing, and then allow it to enter the extraction liquid safely and stably, and enable the extraction liquid to efficiently perform extraction operations, and its construction cost and maintenance cost are relatively low.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for graded extraction of organic matter from medium and low-rank coal, comprising:

[0009] A graded screen mechanism, the graded screen mechanism comprising two vertical plates, three annular plates being fixedly connected in sequence from top to bottom between the two vertical plates, a first filter screen, a second filter screen, and a third filter screen being fixedly installed at the bottom of the three annular plates, the mesh numbers of the first filter screen, the second filter screen, and the third filter screen being increased in sequence, and the first filter screen, the second filter screen, and the third filter screen are all concave toward the middle;

[0010] A graded extraction mechanism, the graded extraction mechanism comprises a bottom plate, the bottoms of the two vertical plates are fixedly mounted with the bottom plates, the top of the bottom plate is fixedly mounted with three extraction cylinders, the middle parts of the first filter screen, the second filter screen, and the third filter screen are all connected with a discharge pipe, and a first electric valve is provided at the connection point, and the lowest ends of the three discharge pipes are respectively connected with the three extraction cylinders;

[0011] A driving mechanism, the driving mechanism comprising a screening mechanism and a stirring mechanism, the screening mechanism enables the first filter screen, the second filter screen, the third filter screen, and the three extraction cylinders to move back and forth obliquely upward to the left and obliquely upward to the right, stably screening the low- and medium-rank coal placed on the first filter screen to the first filter screen, the second filter screen, and the third filter screen, and stably transferring the low- and medium-rank coal in the first filter screen, the second filter screen, the third filter screen, and each discharge pipe to the corresponding extraction cylinder;

[0012] The stirring mechanism allows the three discharge pipes to gradually transfer the graded low- and medium-rank coal to the three extraction cylinders after the first filter, the second filter, and the third filter have finished screening the low- and medium-rank coal, and simultaneously stir the three extraction cylinders to improve the extraction efficiency. The extraction cylinders that move back and forth obliquely upward to the left and upward to the right cooperate with the stirring mechanism to better stir the extracted solutions in the three extraction cylinders.

[0013] Preferably, it also includes an operation box, wherein a plurality of operation slots are provided on the outer wall of the operation box near the bottom, and the grading screen mechanism, the grading extraction mechanism and the driving mechanism are all arranged in the operation box.

[0014] Preferably, a support plate is fixedly mounted on the bottom of the work box.

[0015] Preferably, the middle recessed parts of the first filter screen, the second filter screen and the third filter screen are through holes, and the discharge pipe is connected to the through holes, and a first electric valve is installed at a part of the discharge pipe close to the through holes.

[0016] Preferably, three fixed sleeves are fixedly mounted on the bottom of the extraction cylinder, and the three extraction cylinders are respectively fixed in the three fixed sleeves.

[0017] Preferably, the screening mechanism comprises a fixed horizontal plate, a fixed horizontal plate is fixedly connected between the two vertical plates, a dual-axis motor is fixedly installed on the inner wall of the working box, the power output ends on both sides of the dual-axis motor are connected to the second rotating column, and the outer walls of the two second rotating columns are fixedly installed with symmetrical frustum blocks, the symmetrical frustum blocks are formed by fixedly connecting the small heads of the two frustum blocks, the two frustum blocks are symmetrically arranged, and the outer walls of the symmetrical frustum blocks are provided with spiral grooves of equal depth;

[0018] Two sleeves are fixedly installed on the working box, and a first limiting slide groove is opened in the two sleeves. A connecting plate is connected in the first limiting slide groove for sliding left and right. The bottom of the connecting plate is pressed in the spiral groove, and the two rotating symmetrical frustum blocks drive the two connecting plates to move obliquely upward to the left or right. The tops of the two connecting plates are fixedly connected to the fixed cross plate, so that the first filter screen, the second filter screen, the third filter screen, the three discharge pipes, and the three extraction cylinders can all move obliquely upward to the left or right.

[0019] Preferably, two second bearing seats are fixedly mounted on the inner wall of the work box, and the two second rotating columns are respectively connected to the two second bearing seats in a limited rotation manner.

[0020] Preferably, the stirring mechanism comprises a first bevel gear, wherein the outer wall of one of the second rotating columns is fixedly connected with the first bevel gear, the inner wall of the working box is fixedly connected with a third bearing seat, the third bearing seat is internally limited and rotatably connected with a third rotating column, the top of the third rotating column is fixedly connected with a second bevel gear, and the first bevel gear and the second bevel gear are meshed with each other;

[0021] The outer wall of the third rotating column is fixedly connected to a second gear;

[0022] The work box is fixedly connected to three first bearing seats, and the three first bearing seats are all connected to first rotating columns with limited rotation, and the tops of the three first rotating columns are all fixedly connected to first gears, and the three first gears are circumferentially distributed on the outer periphery of the second gear, and the three first gears are all meshed with the second gear;

[0023] The bottoms of the three first rotating columns are all fixedly connected to spline shafts, the outer walls of the three spline shafts are all slidably connected to spline shaft sleeves in upper and lower limit positions, and the outer walls of the spline shaft sleeves are provided with stirring rods, and the stirring rods on the three spline shaft sleeves can be inserted into the three extraction cylinders for stirring operations;

[0024] The work box is connected to the bearing plate in an upper and lower limited sliding manner through the second limited sliding groove thereon, and the three spline shaft sleeves are all connected to the bearing plate in a limited rotation manner. An electric telescopic rod is fixedly installed on the work box, and the telescopic end of the electric telescopic rod is connected to the bearing plate.

[0025] Preferably, the three extraction cylinders are connected with a first pipe and a second pipe, the first pipe is installed with a second electric valve, the second pipe is installed with a third electric valve, and also include a controller, which is electrically connected with the third electric valve, the second electric valve, the electric telescopic rod, the dual-axis motor, and the first electric valve.

[0026] A method for fractional extraction of organic matter from medium and low rank coals, using the above-mentioned fractional extraction device for organic matter from medium and low rank coals, comprises:

[0027] S1: The crushed low- and medium-rank coal is transferred to the top of the first filter screen, and the extraction liquid is transferred into the three extraction cylinders. At this time, the three stirring rods are respectively placed in the three extraction cylinders, and the multiple first electric valves are in a closed state;

[0028] S2: Start the dual-axis motor to rotate the two second rotating columns and the two symmetrical truncated cone blocks. Through the cooperation between the connecting plate and the spiral groove on the symmetrical truncated cone block, and the left and right limit of the sleeve plate, the two connecting plates drive the fixed horizontal plate, the two vertical plates, and the bottom plate to move back and forth to make left and right oblique upward movements, so that the first filter screen, the second filter screen, the third filter screen, the three discharge pipes, and the three extraction cylinders move back and forth to make left and right oblique upward movements, so that the broken medium and low-rank coal on the first filter screen is graded and screened on the first filter screen, the second filter screen, and the third filter screen;

[0029] S3: When it is observed that the first filter screen no longer drops low- and medium-rank coal, the controller controls the three first electric valves to open, and the discharge pipe, the first filter screen, the second filter screen, the third filter screen, and the extraction cylinder perform left and right oblique upward movements to allow the low- and medium-rank coal on the discharge pipe, the first filter screen, and the second filter screen to stably enter the corresponding extraction cylinder, and the upper and lower parts of the discharge pipe are swung, so that the discharge pipe stably transfers the low- and medium-rank coal in it to the corresponding extraction cylinder, completing the graded screening and transmission of the low- and medium-rank coal;

[0030] S4: When the three extraction cylinders move back and forth to make left and right oblique upward movements, the rotating second rotating column drives the first bevel gear to rotate, the first bevel gear is engaged with the second bevel gear to drive the third rotating column and the second gear to rotate, the second gear is engaged with the three first gears, and drives the spline shaft, the spline shaft sleeve and the stirring rod to rotate, the stirring rod will stir the extraction liquid in the extraction cylinder that moves back and forth to make left and right oblique upward movements, so as to improve the extraction efficiency, and when the graded medium and low-rank coal is gradually transmitted to each extraction cylinder, stirring is performed at the same time to further improve the extraction efficiency.

[0031] Compared with the prior art, the beneficial effects of the present invention include:

[0032] When the dual-axis motor is started, the device makes the first filter, the second filter and the third filter move back and forth to the left and right, simulating the actual screening action, and the low- and medium-rank coal on the first filter is graded and screened on the first filter, the second filter and the third filter;

[0033] The three extraction cylinders at the bottom also move back and forth to the upper left and the upper right. At this time, the top and the bottom of the discharge pipe are shaking left and right, so that the low- and medium-rank coal in the discharge pipe can be stably transferred to the corresponding extraction cylinders. The first filter, the second filter, and the third filter move back and forth to the upper left and the upper right, so that the low- and medium-rank coal on them can stably enter the discharge pipe, thereby stably and completely classifying the low- and medium-rank coal into each extraction cylinder.

[0034] When the extraction cylinder enters the medium and low-rank coal, the spline sleeve and the stirring rod stir the extraction liquid in the extraction cylinder at the same time, so that the material is fed and stirred at the same time, thereby improving the extraction efficiency. The extraction cylinder moves back and forth to the upper left and upper right, which makes the stirring efficiency higher, and the extraction operation is relatively more efficient. The device is convenient for replacing or cleaning the extraction cylinder and for taking out the extraction liquid containing organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0036] Figure 1 It is a structural schematic diagram of the working box of the present invention;

[0037] Figure 2 It is a schematic cross-sectional structural diagram of the device of the present invention;

[0038] Figure 3 For the present invention Figure 2 Schematic diagram of the upper structure;

[0039] Figure 4 For the present invention Figure 2 Schematic diagram of the middle structure;

[0040] Figure 5 For the present invention Figure 2 Schematic diagram of the lower structure;

[0041] Figure 6 for Figure 4 A schematic diagram of the enlarged structure at point A;

[0042] Figure 7 for Figure 4 A schematic diagram of the enlarged structure at B;

[0043] Figure 8It is a schematic diagram of the top view of the structure of the sleeve plate of the present invention.

[0044] Numbers in the figure: 1, operation box; 2, vertical plate; 3, operation slot hole; 4, support plate; 5, controller; 6, ring plate; 7, first filter screen; 8, discharge pipe; 9, first electric valve; 10, second filter screen; 11, third filter screen; 12, fixed horizontal plate; 13, connecting plate; 14, sleeve plate; 15, first limit slide; 16, first rotating column; 17, bearing plate; 18, spline shaft sleeve; 19, stirring rod; 20, second limit slide; 21, third electric valve; 22. First pipeline; 23. Second electric valve; 24. Second pipeline; 25. Bottom plate; 26. Extraction cylinder; 27. Fixed sleeve block; 28. Symmetrical frustum block; 29. ​​Spiral groove; 30. First gear; 31. Spline shaft; 32. First bearing seat; 33. Second rotating column; 34. Second bearing seat; 35. First bevel gear; 36. Double-axis motor; 37. Second bevel gear; 38. Third rotating column; 39. Third bearing seat; 40. Second gear; 41. Electric telescopic rod. DETAILED DESCRIPTION

[0045] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0046] Embodiment 1:

[0047] A device for graded extraction of organic matter from medium and low-rank coal mainly comprises a working box 1, a vertical plate 2, a support plate 4, a first filter screen 7, a second filter screen 10, and a third filter screen 11.

[0048] Key References Figure 1 and Figure 2 Support plates 4 are fixedly installed on both sides of the bottom of the work box 1.

[0049] Key References Figure 2 and Figure 3 Three circular plates 6 are fixedly connected between the two vertical plates 2 from top to bottom, and the bottoms of the three circular plates 6 are fixedly installed with a first filter screen 7, a second filter screen 10, and a third filter screen 11 respectively. The mesh numbers of the first filter screen 7, the second filter screen 10, and the third filter screen 11 increase successively, and the first filter screen 7, the second filter screen 10, and the third filter screen 11 are all concave toward the middle.

[0050] The middle parts of the first filter screen 7, the second filter screen 10 and the third filter screen 11 are open, and the bottoms of the openings are fixedly connected with a discharge pipe 8, and a first electric valve 9 is installed at a portion of the discharge pipe 8 close to the opening.

[0051] Key References Figure 2 and Figure 5 The bottoms of the two vertical plates 2 are fixedly connected to a bottom plate 25, and the tops of the bottom plate 25 are fixedly connected to three fixed sleeves 27. The three fixed sleeves 27 are arranged in a circle, and the tops of the three fixed sleeves 27 are all fixed with extraction cartridges 26, which can be taken out from the fixed sleeves 27.

[0052] The bottoms of the three discharge pipes 8 are respectively connected to the three extraction cylinders 26 , so that the medium and low-rank coal in the discharge pipes 8 can be easily moved into the corresponding extraction cylinders 26 .

[0053] Key References Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 8 A fixed transverse plate 12 is fixedly connected between the two vertical plates 2 , and the fixed transverse plate 12 is located at the bottom of the third filter screen 11 .

[0054] A dual-axis motor 36 is fixedly installed on the inner wall of the work box 1, and the power output ends on both sides of the dual-axis motor 36 are connected to the second rotating column 33. Two second bearing seats 34 are fixedly installed on the inner wall of the work box 1, and the two second rotating columns 33 are respectively limited and rotatably connected in the two second bearing seats 34. And the outer walls of the two second rotating columns 33 are fixedly installed with symmetrical truncated cone blocks 28, which are formed by the fixed connection of the small heads of the two truncated cone blocks. The two truncated cone blocks are symmetrically arranged, and the outer walls of the symmetrical truncated cone blocks 28 are provided with spiral grooves 29 of equal depth;

[0055] Two sleeve plates 14 are fixedly installed on the working box 1, and first limiting slide grooves 15 are opened in the two sleeve plates 14. A connecting plate 13 is connected to the first limiting slide groove 15 for sliding left and right. The bottom of the connecting plate 13 is pressed in the spiral groove 29, and the two rotating symmetrical frustum blocks 28 drive the two connecting plates 13 to move obliquely upward to the left or right. The tops of the two connecting plates 13 are fixedly connected to the fixed cross plate 12, so that the first filter screen 7, the second filter screen 10, the third filter screen 11, the three discharge pipes 8, and the three extraction cylinders 26 can all move obliquely upward to the left or right, so that the first filter screen 7, the second filter screen 10, and the third filter screen 11 can screen and grade the low- and medium-rank coal on the top of the first filter screen 7, and then open the three first electric valves 9 to stably and safely transfer the graded low- and medium-rank coal to the corresponding extraction cylinders 26 through the discharge pipes 8.

[0056] Embodiment 2: Based on Embodiment 1, a technical means is added to facilitate efficient extraction of low- and medium-rank coal organic matter in the extraction cylinder 26 .

[0057] Key References Figure 4 , Figure 5 , Figure 6 , Figure 7 , the outer wall of one of the second rotating columns 33 is fixedly connected with the first bevel gear 35, the inner wall of the working box 1 is fixedly connected with the third bearing seat 39, the third rotating column 38 is limitedly connected to the third bearing seat 39, the top of the third rotating column 38 is fixedly connected with the second bevel gear 37, the first bevel gear 35 and the second bevel gear 37 are meshed with each other; the outer wall of the third rotating column 38 is fixedly connected with the second gear 40;

[0058] The work box 1 is fixedly connected with three first bearing seats 32, and the three first bearing seats 32 are all connected with the first rotating columns 16 in a limited rotation manner. The tops of the three first rotating columns 16 are all fixedly connected with the first gears 30. The three first gears 30 are circumferentially distributed on the outer periphery of the second gear 40, and the three first gears 30 are all meshed with the second gear 40.

[0059] The bottoms of the three first rotating columns 16 are all fixedly connected with spline shafts 31, and the outer walls of the three spline shafts 31 are all slidably connected with spline shaft sleeves 18 in upper and lower limit positions. The outer walls of the spline shaft sleeves 18 are provided with stirring rods 19. The stirring rods 19 on the three spline shaft sleeves 18 can be inserted into the three extraction cylinders 26 for stirring operation;

[0060] The work box 1 is connected to the bearing plate 17 for upper and lower limiting sliding through the second limiting slide groove 20 thereon. The three spline sleeves 18 are all connected to the bearing plate 17 for limited rotation. An electric telescopic rod 41 is fixedly installed on the work box 1, and the telescopic end of the electric telescopic rod 41 is connected to the bearing plate 17.

[0061] The other structures are the same as those in the first embodiment.

[0062] Embodiment 3: Based on Embodiment 2, a technical means is added to facilitate the removal of the extract containing organic matter.

[0063] Key References Figure 1 The outer wall of the working box 1 near the bottom is provided with three working slots 3, each extraction cylinder 26 is connected with a first pipe 22 and a second pipe 24, a second electric valve 23 is installed on the first pipe 22, and a third electric valve 21 is installed on the second pipe 24, which are used to put in the extracting liquid and extract the extracting liquid with the required organic solute. The external pipe is connected with the first pipe 22 and the second pipe 24 through the working slot 3.

[0064] The other structures are the same as those in the second embodiment.

[0065] A method for fractional extraction of organic matter from medium and low-rank coals, comprising:

[0066] S1: The crushed low- and medium-rank coal is transferred to the top of the first filter screen 7, and the extract is transferred into the three extraction cylinders 26. At this time, the three stirring rods 19 are respectively placed in the three extraction cylinders 26, and the multiple first electric valves 9 are in a closed state;

[0067] S2: Start the dual-axis motor 36 to rotate the two second rotating columns 33 and the two symmetrical truncated cone blocks 28. Through the cooperation between the connecting plate 13 and the spiral groove 29 on the symmetrical truncated cone blocks 28, and the left and right limit of the sleeve plate 14, the two connecting plates 13 drive the fixed horizontal plate 12, the two vertical plates 2, and the bottom plate 25 to move back and forth to make left and right oblique upward movements, so that the first filter screen 7, the second filter screen 10, the third filter screen 11, the three discharge pipes 8, and the three extraction cylinders 26 move back and forth to make left and right oblique upward movements, so that the crushed medium and low-rank coal on the first filter screen 7 is graded and screened on the first filter screen 7, the second filter screen 10, and the third filter screen 11;

[0068] S3: When it is observed that the first filter screen 7 no longer drops the low- and medium-rank coal, the controller 5 controls the three first electric valves 9 to open, and the discharge pipe 8, the first filter screen 7, the second filter screen 10, the third filter screen 11, and the extraction cylinder 26 move back and forth to the left and right, so that the low- and medium-rank coal on the discharge pipe 8, the first filter screen 7, and the second filter screen 10 stably enter the corresponding extraction cylinder 26, and the upper and lower parts of the discharge pipe 8 are swung, so that the discharge pipe 8 stably transfers the low- and medium-rank coal therein to the corresponding extraction cylinder 26, completing the graded screening and transfer of the low- and medium-rank coal;

[0069] S4: When the three extraction cylinders 26 move back and forth to make left and right oblique upward movements, the rotating second rotating column 33 drives the first bevel gear 35 to rotate, and the first bevel gear 35 is engaged with the second bevel gear 37 to drive the third rotating column 38 and the second gear 40 to rotate. The second gear 40 is engaged with the three first gears 30 to drive the spline shaft 31, the spline shaft sleeve 18, and the stirring rod 19 to rotate. The stirring rod 19 stirs the extraction liquid in the extraction cylinder 26 that moves back and forth to make left and right oblique upward movements, thereby improving the extraction efficiency. When the graded medium and low-rank coal is gradually transmitted to each extraction cylinder 26, stirring is performed at the same time to further improve the extraction efficiency.

[0070] In this embodiment, the medium and low-rank coal crushed from the outside is transferred to the top of the first filter screen 7, and the corresponding extracting liquid is transferred from the working slot hole 3 to the three extraction cylinders 26. The electric telescopic rod 41 is in an extended state, the three stirring rods 19 are respectively placed in the three extraction cylinders 26, and the multiple first electric valves 9 are in a closed state.

[0071] The dual-axis motor 36 is started to rotate the two second rotating columns 33 and the two symmetrical truncated cone blocks 28. Through the cooperation between the connecting plate 13 and the spiral groove 29 on the symmetrical truncated cone blocks 28, and the left and right limit of the sleeve plate 14, the two connecting plates 13 drive the fixed horizontal plate 12, the two vertical plates 2, and the bottom plate 25 to move back and forth to the left and right, so that the first filter screen 7, the second filter screen 10, the third filter screen 11, the three discharge pipes 8, and the three extraction cylinders 26 move back and forth to the left and right, so that the crushed medium and low-rank coal on the first filter screen 7 is graded and screened on the first filter screen 7, the second filter screen 10, and the third filter screen 11;

[0072] When it is observed that the first filter screen 7 no longer drops the low- and medium-rank coal, the controller 5 controls the three first electric valves 9 to open, and the discharge pipe 8, the first filter screen 7, the second filter screen 10, the third filter screen 11, and the extraction cylinder 26 move back and forth to the left and right, so that the low- and medium-rank coal on the discharge pipe 8, the first filter screen 7, and the second filter screen 10 stably enter the corresponding extraction cylinder 26, and the upper and lower parts of the discharge pipe 8 swing, so that the discharge pipe 8 stably transfers the low- and medium-rank coal therein to the corresponding extraction cylinder 26, completing the graded screening and transfer of the low- and medium-rank coal;

[0073] When the three extraction cylinders 26 move back and forth to make left and right oblique upward movements, the rotating second rotating column 33 drives the first bevel gear 35 to rotate, and the first bevel gear 35 is engaged with the second bevel gear 37 to drive the third rotating column 38 and the second gear 40 to rotate. The second gear 40 is engaged with the three first gears 30 to drive the spline shaft 31, the spline shaft sleeve 18, and the stirring rod 19 to rotate. The stirring rod 19 stirs the extraction liquid in the extraction cylinder 26 that moves back and forth to make left and right oblique upward movements, thereby improving the extraction efficiency. When the graded medium and low-rank coal is gradually transmitted to each extraction cylinder 26, stirring is performed at the same time to further improve the extraction efficiency.

[0074] When each extraction cylinder 26 needs to be cleaned, the dual-axis motor 36 is turned off, and the electric telescopic rod 41 is started to lift the bearing plate 17, the spline sleeve 18, and the stirring rod 19 so that the spline sleeve 18 and the stirring rod 19 are separated from the extraction cylinder 26.

[0075] At this time, the extraction cartridge 26 is taken out from the operation slot 3 and cleaned or replaced with a new one.

[0076] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A device for graded extraction of organic matter from medium and low rank coal, characterized in that: include: A grading screen mechanism, the grading screen mechanism comprising two vertical plates (2), three annular plates (6) being fixedly connected in sequence from top to bottom between the two vertical plates (2), a first filter screen (7), a second filter screen (10), and a third filter screen (11) being fixedly installed at the bottom of the three annular plates (6), respectively, the mesh numbers of the first filter screen (7), the second filter screen (10), and the third filter screen (11) increasing in sequence, and the first filter screen (7), the second filter screen (10), and the third filter screen (11) are all concave toward the middle; A graded extraction mechanism, the graded extraction mechanism comprising a bottom plate (25), the bottoms of the two vertical plates (2) are fixedly mounted with the bottom plates (25), the top of the bottom plate (25) is fixedly mounted with three extraction cylinders (26), the middle parts of the first filter screen (7), the second filter screen (10), and the third filter screen (11) are all connected with a discharge pipe (8), and a first electric valve (9) is provided at the connection point, and the lowest ends of the three discharge pipes (8) are respectively connected with the three extraction cylinders (26); A driving mechanism, the driving mechanism comprising a screening mechanism and a stirring mechanism, the screening mechanism causing the first filter screen (7), the second filter screen (10), the third filter screen (11), and the three extraction cylinders (26) to move back and forth obliquely upward to the left and obliquely upward to the right, stably screening the low- and medium-rank coal placed on the first filter screen (7) onto the first filter screen (7), the second filter screen (10), and the third filter screen (11), and stably transferring the low- and medium-rank coal in the first filter screen (7), the second filter screen (10), the third filter screen (11), and each discharge pipe (8) to the corresponding extraction cylinder (26); The stirring mechanism enables the three discharge pipes (8) to gradually transfer the graded low- and medium-rank coal to the three extraction cylinders (26) after the first filter screen (7), the second filter screen (10) and the third filter screen (11) have finished screening the low- and medium-rank coal, and simultaneously stir the three extraction cylinders (26) to improve the extraction efficiency. The extraction cylinders (26) that move back and forth obliquely upward to the left and obliquely upward to the right cooperate with the stirring mechanism to better stir the extracted solutions in the three extraction cylinders (26).

2. The device for graded extraction of organic matter from medium and low-rank coal according to claim 1, characterized in that: It also comprises an operation box (1), wherein a plurality of operation slots (3) are provided on the outer wall of the operation box (1) near the bottom, and the grading screen mechanism, the grading extraction mechanism and the driving mechanism are all arranged in the operation box (1).

3. The device for graded extraction of organic matter from medium and low-rank coal according to claim 1, characterized in that: A support plate (4) is fixedly mounted on the bottom of the work box (1).

4. The device for graded extraction of organic matter from medium and low-rank coal according to claim 2, characterized in that: The middle recessed areas of the first filter screen (7), the second filter screen (10) and the third filter screen (11) are through holes, and the discharge pipe (8) is connected to the through holes. A first electric valve (9) is installed at a position of the discharge pipe (8) close to the through holes.

5. The device for graded extraction of organic matter from medium and low-rank coal according to claim 4, characterized in that: Three fixed sleeves (27) are fixedly mounted on the bottom of the extraction cylinder (26), and the three extraction cylinders (26) are respectively fixed in the three fixed sleeves (27).

6. The device for graded extraction of organic matter from medium and low rank coal according to claim 5, characterized in that: The screening mechanism comprises a fixed transverse plate (12), the fixed transverse plate (12) being fixedly connected between the two vertical plates (2), a double-axis motor (36) being fixedly installed on the inner wall of the working box (1), the power output ends on both sides of the double-axis motor (36) being connected to second rotating columns (33), and symmetrical truncated cone blocks (28) being fixedly installed on the outer walls of the two second rotating columns (33), the symmetrical truncated cone blocks (28) being formed by fixedly connecting the small heads of the two truncated cone blocks, the two truncated cone blocks being symmetrically arranged, and the outer walls of the symmetrical truncated cone blocks (28) being provided with spiral grooves (29) of equal depth; Two sleeve plates (14) are fixedly installed on the operation box (1), and first limiting sliding grooves (15) are provided in the two sleeve plates (14). A connecting plate (13) is slidably connected to the first limiting sliding groove (15) in the left and right directions. The bottom of the connecting plate (13) is pressed in the spiral groove (29). The two rotating symmetrical frustum blocks (28) drive the two connecting plates (13) to move obliquely upward to the left or to the right. The tops of the two connecting plates (13) are fixedly connected to the fixed transverse plate (12), so as to enable the first filter screen (7), the second filter screen (10), the third filter screen (11), the three discharge pipes (8), and the three extraction cylinders (26) to move obliquely upward to the left or to the right.

7. The device for graded extraction of organic matter from medium and low-rank coal according to claim 6, characterized in that: Two second bearing seats (34) are fixedly mounted on the inner wall of the work box (1), and the two second rotating columns (33) are respectively connected in a limited rotation manner in the two second bearing seats (34).

8. The device for graded extraction of organic matter from medium and low-rank coal according to claim 7, characterized in that: The stirring mechanism comprises a first bevel tooth (35), wherein the outer wall of one of the second rotating columns (33) is fixedly connected with the first bevel tooth (35), the inner wall of the working box (1) is fixedly connected with a third bearing seat (39), the inner wall of the third bearing seat (39) is connected with a third rotating column (38) in a limited rotation manner, the top of the third rotating column (38) is fixedly connected with a second bevel tooth (37), and the first bevel tooth (35) and the second bevel tooth (37) are meshed with each other; The outer wall of the third rotating column (38) is fixedly connected with a second gear (40); The operation box (1) is fixedly connected to three first bearing seats (32), the three first bearing seats (32) are all connected to first rotating columns (16) in a limited rotation manner, the tops of the three first rotating columns (16) are all fixedly connected to first gears (30), the three first gears (30) are circumferentially distributed on the outer periphery of the second gear (40), and the three first gears (30) are all meshed with the second gear (40); The bottoms of the three first rotating columns (16) are all fixedly connected to a spline shaft (31), the outer walls of the three spline shafts (31) are all slidably connected to a spline shaft sleeve (18) in an upper and lower limited manner, and the outer wall of the spline shaft sleeve (18) is provided with a stirring rod (19), and the stirring rods (19) on the three spline shaft sleeves (18) can be inserted into the three extraction cylinders (26) for stirring operation; The work box (1) is connected to the bearing plate (17) in an upper and lower limited sliding manner through a second limited sliding groove (20) thereon, and the three spline shaft sleeves (18) are all connected to the bearing plate (17) in a limited rotation manner. An electric telescopic rod (41) is fixedly installed on the work box (1), and the telescopic end of the electric telescopic rod (41) is connected to the bearing plate (17).

9. The device for graded extraction of organic matter from medium and low-rank coal according to claim 8, characterized in that: The three extraction cylinders (26) are all connected to a first pipeline (22) and a second pipeline (24); a second electric valve (23) is installed on the first pipeline (22); a third electric valve (21) is installed on the second pipeline (24); and a controller (5) is also included. The controller (5) is electrically connected to the third electric valve (21), the second electric valve (23), the electric telescopic rod (41), the dual-axis motor (36), and the first electric valve (9).

10. A method for fractional extraction of organic matter from medium and low rank coal, using the device for fractional extraction of organic matter from medium and low rank coal as claimed in claim 9, characterized in that: include: S1: The crushed low- and medium-rank coal from the outside is transferred to the top of the first filter screen (7), and the extraction liquid is transferred into the three extraction cylinders (26). At this time, the three stirring rods (19) are respectively placed in the three extraction cylinders (26), and the multiple first electric valves (9) are in a closed state; S2: Start the double-axis motor (36) to rotate the two second rotating columns (33) and the two symmetrical truncated cone blocks (28). Through the cooperation between the connecting plate (13) and the spiral groove (29) on the symmetrical truncated cone blocks (28), and the left and right limit of the sleeve plate (14), the two connecting plates (13) drive the fixed horizontal plate (12), the two vertical plates (2), and the bottom plate (25) to move back and forth to the left and right, thereby causing the first filter screen (7), the second filter screen (10), the third filter screen (11), the three discharge pipes (8), and the three extraction cylinders (26) to move back and forth to the left and right, so that the crushed medium and low-rank coal on the first filter screen (7) is graded and screened on the first filter screen (7), the second filter screen (10), and the third filter screen (11); S3: When it is observed that the first filter (7) no longer drops low- and medium-rank coal, the controller (5) controls the three first electric valves (9) to open, and the discharge pipe (8), the first filter (7), the second filter (10), the third filter (11), and the extraction cylinder (26) move back and forth in a left-upward and right-upward motion, so that the low- and medium-rank coal on the discharge pipe (8), the first filter (7), and the second filter (10) stably enter the corresponding extraction cylinder (26), and the upper and lower parts of the discharge pipe (8) are swung, so that the discharge pipe (8) stably transfers the low- and medium-rank coal therein to the corresponding extraction cylinder (26), thereby completing the graded screening and transfer of the low- and medium-rank coal; S4: When the three extraction cylinders (26) move back and forth in a left-upward and right-upward motion, the rotating second rotating column (33) drives the first bevel gear (35) to rotate, and the first bevel gear (35) and the second bevel gear (37) are meshed to drive the third rotating column (38) and the second gear (40) to rotate. The second gear (40) and the three first gears (30) are meshed with each other to drive the spline shaft (31), the spline shaft sleeve (18) and the stirring rod (19) to rotate. The stirring rod (19) stirs the extraction liquid in the extraction cylinder (26) that moves back and forth in a left-upward and right-upward motion, thereby improving the extraction efficiency. When the graded medium and low-rank coal is gradually transferred to each extraction cylinder (26), stirring is performed at the same time to further improve the extraction efficiency.

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