Coal slime solid-liquid separation equipment and use method thereof

Abstract

The present invention relates to the technical field of coal slime dehydration, and specifically discloses a coal slime solid-liquid separation device and a method for using the same. The coal slime solid-liquid separation device exemplified by the present invention includes a bracket and a rotating shaft, a rotating drum is installed on the bracket, the drum includes a straight cylinder section and a conical cylinder section, one end of the rotating shaft is provided with a material trough along its axial direction, a plurality of discharge holes connected to the material trough are provided on the outer peripheral side of the rotating shaft, both ends of the rotating shaft pass through the rotating drum and extend to the outside of the rotating drum, the discharge hole is located in the rotating drum, a spiral blade is fixed at the position of the rotating shaft in the rotating drum, an opening is provided on the conical cylinder section, a ring plate is fixedly installed on the outside of the opening, an extrusion plate is slidably installed on the rotating shaft, and the extrusion plate is located outside the rotating drum. The coal slime solid-liquid separation device exemplified by the present invention realizes pressurized dehydration on the basis of centrifugal dehydration of the coal slime, thereby improving the dehydration effect of the coal slime. The method for using the coal slime solid-liquid separation device exemplified by the present invention is simple to operate and reduces the workload of the staff.

Description

Technical Field

[0001] The present invention relates to the technical field of coal slime dehydration, in particular to coal slime solid-liquid separation equipment and a use method thereof. Background Art

[0002] During the coal washing process, water is used to clean the coal in order to remove impurities such as gangue or other impurities. During the washing process, smaller coal particles and water are mixed to form coal slime containing a large number of fine coal particles. If the coal slime is discharged directly without treatment, it will cause water pollution and air pollution. In addition, coal slime with high water content is heavy and has high transportation costs.

[0003] In the prior art, coal slime dehydration is usually carried out using physical or chemical methods: physical methods include filtration, centrifugal separation, etc., while chemical methods may involve the use of flocculants to help solid particles aggregate so that the coal slime can be separated more easily.

[0004] The use of the filtration type dehydration device has poor continuity, requires constant cleaning of the filter material, and has poor applicability; the centrifugal dehydration device uses the density difference between the solid and liquid phases to accelerate the sedimentation rate of the solid phase particles under the action of centrifugal force to achieve solid-liquid separation, but the water content of the coal slime is high after dehydration, and secondary dehydration or drying is required. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a coal slime solid-liquid separation equipment and a method of use thereof. The coal slime solid-liquid separation equipment realizes pressurized dehydration on the basis of centrifugal dehydration of the coal slime, thereby improving the dehydration effect of the coal slime. The method of use of the coal slime solid-liquid separation equipment is simple to operate and reduces the workload of the staff.

[0006] The technical solutions adopted by the present invention to solve the technical problems include:

[0007] On the one hand, a coal slime solid-liquid separation device is provided, including a bracket and a rotating shaft, a rotating drum is installed on the bracket, the rotating drum includes a straight cylinder section and a conical cylinder section, one end of the rotating shaft is provided with a material trough along its axial direction, and a plurality of discharge holes connected to the material trough are provided on the outer peripheral side of the rotating shaft, both ends of the rotating shaft pass through the rotating drum and extend to the outside of the rotating drum, the discharge holes are located in the rotating drum, and a spiral blade is fixed to the position of the rotating shaft in the rotating drum.

[0008] The conical cylinder section is provided with an opening at a position away from the straight cylinder section, a ring plate is fixedly installed on the outside of the opening, an extrusion plate is slidably installed on the rotating shaft, and the extrusion plate is located outside the rotating cylinder, the extrusion plate and the ring plate are in contact with each other, a position-adjustable stopper is fixed on the rotating shaft, an elastic member is installed between the stopper and the extrusion plate, and a plurality of drainage holes are provided at equal angles around the central axis of the straight cylinder section at a position away from the conical cylinder section.

[0009] The drum and the shaft are driven by an external power mechanism to rotate in the same direction, and there is a speed difference between the rotation speed of the drum and the rotation speed of the shaft. The hydrated coal slime is continuously input into the feed chute, and the hydrated coal slime enters the drum through the discharge hole. Under the action of centrifugal force, the hydrated coal slime is divided into a coal slime annular layer attached to the inner wall of the drum and a water annular layer attached to the coal slime annular layer. The spiral blades push the coal slime to move toward the opening on the inner wall of the conical cylinder section, and the coal slime on the inner wall of the conical cylinder section pushes open the extrusion plate and leaves from the gap between the extrusion plate and the annular plate. The water in the straight cylinder section continuously overflows through the drainage hole.

[0010] As a preferred technical solution of the present invention, a heating component is fixed to a position of the extrusion plate away from the ring plate, and the extrusion plate is made of metal.

[0011] When the coal slime is in the gap between the extrusion plate and the ring plate, the temperature of the coal slime is 101°C-120°C, and the temperature of the extrusion plate is not higher than 270°C.

[0012] As a preferred technical solution of the present invention, it also includes a cover shell fixed on the bracket, the rotating drum is located in the cover shell, and a coal slime outlet is opened at a position corresponding to the extrusion plate on the bottom side of the cover shell, and a water outlet is opened at a position corresponding to the drainage hole on the bottom side of the cover shell.

[0013] As a preferred technical solution of the present invention, an air passage is also provided in the rotating shaft, and an air outlet and an air inlet connected to the air passage are provided on the rotating shaft. The air inlet is located inside the rotating drum, and the air outlet is located outside the rotating drum, and the air outlet is arranged near the coal slime outlet.

[0014] As a preferred technical solution of the present invention, a soft or elastic cover tube is sleeved on the rotating shaft, the elastic member is located in the cover tube, and both ends of the cover tube are fixedly connected to the extrusion plate and the stop block respectively.

[0015] As a preferred technical solution of the present invention, a guide protrusion strip is fixedly provided on the rotating shaft, and a sliding groove adapted to the guide protrusion strip is provided on the extrusion plate.

[0016] As a preferred technical solution of the present invention, a liquid blocking plate for blocking the liquid drainage hole is installed on the straight cylinder section.

[0017] As a preferred technical solution of the present invention, the elastic member is a spring sleeved on the rotating shaft.

[0018] On the other hand, a method for using a coal slime solid-liquid separation device is also provided, which uses any of the above-mentioned coal slime solid-liquid separation devices, comprising the following steps:

[0019] Adjust the position of the stopper on the rotating shaft so that the pressure of the extrusion plate on the ring plate reaches the set value.

[0020] The rotating drum and the rotating shaft are driven by an external power mechanism to rotate in the same direction, and there is a speed difference between the rotating drum and the rotating shaft.

[0021] The hydrated coal slime is input into the feeding chute, and the hydrated coal slime enters the rotating drum through the discharge hole.

[0022] As a preferred technical solution of the present invention, the following steps are also included:

[0023] The heating element is working.

[0024] When the coal slime is in the gap between the extrusion plate and the ring plate, the temperature of the coal slime is 101°C-120°C, and the temperature of the extrusion plate is not higher than 270°C.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The coal slime solid-liquid separation equipment of the present invention adjusts the position of the stopper on the rotating shaft so that the pressure of the extrusion plate on the ring plate reaches the set value: on the one hand, the spiral blades cause the coal slime on the inner wall of the cone section to push the extrusion plate away and leave from the gap between the extrusion plate and the ring plate, thereby achieving extrusion dehydration of the coal slime. On the basis of centrifugal dehydration of the coal slime, pressurized dehydration is achieved, thereby improving the dehydration effect of the coal slime; on the other hand, the heating component heats the extrusion plate. After the coal slime leaves the gap between the extrusion plate and the ring plate, part of the water in the coal slime instantly evaporates into steam, thereby dispersing the coal slime and achieving evaporation and dehydration of the coal slime, thereby further reducing the coal slime. On the other hand, with the spiral blades as the power source, the spiral blades suck the air outside the drum into the drum, and the air in the drum flows to the outside of the drum through the air inlet, the air passage and the air outlet. The air flowing out of the air outlet blows away the water vapor near the extrusion plate and the ring plate, reducing the air humidity near the coal slime outlet, prompting the water in the loose coal slime to evaporate, and further reducing the water content of the coal slime; on the other hand, the sliding slot and the guide protrusion strip cooperate to prevent the extrusion plate from rotating around the rotating shaft, and the extrusion plate and the ring plate rotate relative to each other to crush the lumps in the coal slime, thereby reducing the subsequent screening and crushing steps of the coal slime treatment and reducing the coal slime treatment cost.

[0027] 2. In the coal slime solid-liquid separation equipment of the present invention, after the coal slime escapes from the gap between the extrusion plate and the ring plate, part of the water in the coal slime instantly evaporates into steam. The generated steam disperses the coal slime. The impact force of the dispersed coal slime on the cover is smaller than that of the agglomerated coal slime, and the noise generated is small, thereby reducing the impact of noise on the health of workers.

[0028] 3. In the coal slime solid-liquid separation equipment of the present invention, the shield pipe prevents the coal slime from adhering to the rotating shaft, thereby preventing the coal slime from affecting the movement of the extrusion plate along the rotating shaft, thereby improving the reliability of the coal slime solid-liquid separation equipment.

[0029] 4. The method for using the coal slime solid-liquid separation equipment of the present invention is simple to operate and reduces the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the cover shell of the present invention being opened;

[0032] Figure 3 It is a schematic diagram of the structure of the rotating shaft and the rotating drum of the present invention;

[0033] Figure 4 for Figure 3 A schematic diagram of a partial cross-sectional structure of a rotating drum;

[0034] Figure 5 for Figure 4 A magnified schematic diagram of the structure at A;

[0035] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the rotating shaft of the present invention;

[0036] Figure 7 It is a schematic diagram of the top structure of the present invention.

[0037] In the figure: 1 cover, 2 bracket, 3 rotating drum, 4 rotating shaft, 5 drainage hole, 6 liquid baffle plate, 7 extrusion plate, 8 ring plate, 9 spiral blade, 10 air inlet, 11 discharge hole, 12 air outlet, 13 stopper, 14 elastic member, 15 cover pipe, 16 heating component, 17 air passage, 18 material trough, 19 water outlet, 20 coal slime outlet. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] Example 1:

[0040] See also Figure 1-7The present embodiment discloses a coal slime solid-liquid separation device, including a bracket 2 and a rotating shaft 4. A rotating drum 3 is mounted on the bracket 2 through a bearing seat. The drum 3 includes a straight section and a tapered section. One end of the rotating shaft 4 is provided with a material trough 18 along its axial direction. A plurality of discharge holes 11 connected to the material trough 18 are provided on the outer circumference of the rotating shaft 4. Both ends of the rotating shaft 4 pass through the drum 3 and extend to the outside of the drum 3. The rotating shaft 4 is mounted on the bracket 2 through a bearing seat. The discharge hole 11 is located in the drum 3. A spiral blade 9 is fixed to the position of the rotating shaft 4 in the drum 3.

[0041] An opening is provided at a position where the conical cylinder section is away from the straight cylinder section, and a ring plate 8 is fixedly installed on the outside of the opening. An extrusion plate 7 is slidably installed on the rotating shaft 4, and the extrusion plate 7 and the ring plate 8 are in contact with each other. A stopper 13 is fixed to the rotating shaft 4 by a clamp or a bolt. The position of the stopper 13 on the rotating shaft 4 is adjustable, and the extrusion plate 7 and the stopper 13 are both located outside the rotating cylinder 3. An elastic member 14 is installed between the stopper 13 and the extrusion plate 7. A plurality of drainage holes 5 are provided at equal angles around the central axis of the straight cylinder section at a position where the straight cylinder section is away from the conical cylinder section, and the central axis of the rotating cylinder 3 coincides with the central axis of the rotating shaft 4.

[0042] Preferably, the elastic member 14 is a spring or an elastic rubber sleeve sleeved on the rotating shaft 4 .

[0043] The working process and principle of this embodiment are:

[0044] The staff causes the external power mechanism to drive the drum 3 and the rotating shaft 4 to rotate in the same direction, and there is a speed difference between the rotation speed of the drum 3 and the rotation speed of the rotating shaft 4. The staff causes the external material pump to continuously input the water-containing coal slime into the material chute 18, and the water-containing coal slime enters the drum 3 through the discharge hole 11. The coal slime in the water-containing coal slime adheres to the inner wall of the drum 3 under the action of centrifugal force, and a coal slime ring layer adhered to the inner wall of the drum 3 and a water ring layer adhered to the coal slime ring layer are formed in the drum 3. The spiral blades 9 push the coal slime to move toward the opening on the inner wall of the conical cylinder section to achieve separation of the coal slime and water. Then the spiral blades 9 cause the coal slime on the inner wall of the conical cylinder section to push open the extrusion plate 7 and leave from the gap between the extrusion plate 7 and the ring plate 8, thereby achieving extrusion dehydration of the coal slime, and the water in the straight cylinder section continuously overflows through the drainage hole 5.

[0045] Preferably, the external power mechanism includes a main motor, an auxiliary motor and a differential. The main motor drives the rotating drum 3 to rotate, and the auxiliary motor drives the rotating shaft 4 to rotate through the differential. The differential causes a stable relative motion between the spiral blades 9 and the rotating drum 3, so that the spiral blades 9 push the coal slime on the inner wall of the straight cylinder section to the inner wall of the conical cylinder section.

[0046] Example 2:

[0047] like Figure 4 、 5As shown, this embodiment discloses a coal slime solid-liquid separation device, whose structure is roughly the same as that of the first embodiment, except that a heating assembly 16 is fixed to the position of the extrusion plate 7 away from the ring plate 8 in this embodiment, and the extrusion plate 7 is made of metal.

[0048] Furthermore, the heating component 16 is an electric heating plate, and the heating component 16 is electrically connected to an external control switch through a conductive ring; or the heating component 16 is a thermal oil heater, and the thermal oil heater includes a heat source, a circulation pump and a heat exchanger, and the heat exchanger is fixed on the extrusion plate 7, and the heat exchanger is connected to the circulation pump through a rotating hollow joint.

[0049] The heating component 16 used in the present invention is a common component in the prior art. Its working method and structure are well-known technologies and will not be described in detail here.

[0050] The working process and principle of this embodiment are:

[0051] The staff operates the heating component 16 to heat the extrusion plate 7. The temperature of the extrusion plate 7 is not higher than 270°C to prevent the coal slime from being ignited. When the coal slime is in the gap between the extrusion plate 7 and the ring plate 8, the extrusion plate 7 and the ring plate 8 squeeze the coal slime so that the temperature of the coal slime is 101°C-120°C. After the coal slime leaves the gap between the extrusion plate 7 and the ring plate 8, part of the water in the coal slime instantly evaporates into steam, which disperses the coal slime and realizes evaporation and dehydration of the coal slime, thereby further reducing the water content of the coal slime.

[0052] Preferably, a heat-insulating material is provided on the heating component 16 , and the heat-insulating material reduces the heat loss of the heating component 16 .

[0053] Example 3:

[0054] like Figure 1 、 Figure 2 、 Figure 7 As shown, this embodiment discloses a coal slime solid-liquid separation device, whose structure is roughly the same as that of the second embodiment, except that this embodiment further includes an internal hollow cover shell 1 fixed on the bracket 2, the rotating drum 3 is located in the cover shell 1, and a coal slime outlet 20 is opened at the position of the extrusion plate 7 on the bottom side of the cover shell 1, and a water outlet 19 is opened at the position of the drainage hole 5 on the bottom side of the cover shell 1, and both ends of the rotating shaft 4 pass through the cover shell 1 and extend to the outside of the cover shell 1.

[0055] The working process and principle of this embodiment are:

[0056] After the coal slime escapes from the gap between the extrusion plate 7 and the ring plate 8, the dispersed coal slime falls on the inner wall of the cover 1. The impact force of the dispersed coal slime on the cover 1 is smaller than that of the agglomerated coal slime, and the noise generated is small, thereby reducing the impact of noise on the health of workers.

[0057] Example 4:

[0058] like Figure 4 、 Figure 5 、 Figure 6 As shown, this embodiment discloses a coal slime solid-liquid separation device, whose structure is roughly the same as that of the third embodiment, except that, in this embodiment, an air passage 17 is further provided in the rotating shaft 4, and an air outlet 12 and an air inlet 10 connected to the air passage 17 are provided on the rotating shaft 4. The air inlet 10 is located in the rotating drum 3, and the air outlet 12 is located outside the rotating drum 3, and the air outlet 12 is arranged near the coal slime outlet 20.

[0059] The working process and principle of this embodiment are:

[0060] The rotating shaft 4 drives the spiral blades 9 to rotate, and the spiral blades 9 suck the air outside the drum 3 into the drum 3, and the air inside the drum 3 accumulates in the conical section. The air pressure in the conical section increases, and the air in the conical section flows out of the drum 3 through the air inlet 10, the air passage 17, and the air outlet 12. The air flowing out of the air outlet 12 blows away the water vapor near the extrusion plate 7 and the ring plate 8, reducing the air humidity near the coal slime outlet 20, prompting the water in the loose coal slime to evaporate, and further reducing the water content of the coal slime.

[0061] Embodiment 5:

[0062] like Figure 5 As shown, this embodiment discloses a coal slime solid-liquid separation device, whose structure is roughly the same as that of the fourth embodiment, except that, in this embodiment, a soft or elastic cover tube 15 is sleeved on the rotating shaft 4, the elastic member 14 is located in the cover tube 15, and the two ends of the cover tube 15 are fixedly connected to the extrusion plate 7 and the block 13 respectively, and the air outlet 12 is not located in the cover tube 15.

[0063] The working process and principle of this embodiment are:

[0064] The cover pipe 15 prevents the coal slime from adhering to the rotating shaft 4, thereby preventing the coal slime from affecting the movement of the extrusion plate 7 along the rotating shaft 4, thereby improving the reliability of the coal slime solid-liquid separation equipment.

[0065] Example 6:

[0066] like Figure 5 As shown, this embodiment discloses a coal slime solid-liquid separation device, whose structure is roughly the same as that of the first embodiment, except that a guide protrusion strip is fixedly provided on the rotating shaft 4 of this embodiment, and a sliding slot adapted to the guide protrusion strip is provided on the extrusion plate 7.

[0067] The working process and principle of this embodiment are:

[0068] The sliding slot and the guide protrusion strip cooperate to prevent the extrusion plate 7 from rotating around the rotating shaft 4. Due to the speed difference between the rotating drum 3 and the rotating shaft 4, the extrusion plate 7 and the ring plate 8 rotate relative to each other, crushing the agglomerates in the coal slime, reducing the screening and crushing steps for subsequent coal slime processing, and reducing the processing cost of the coal slime.

[0069] Embodiment seven:

[0070] like Figure 3 As shown, this embodiment discloses a coal slime solid-liquid separation device, the structure of which is substantially the same as that of the first embodiment, except that a liquid baffle 6 for blocking the drainage hole 5 is installed on the straight cylinder section of this embodiment.

[0071] The working process and principle of this embodiment are:

[0072] The staff adjusts the position of the liquid baffle 6 along the radial direction of the drum 3 to adjust the liquid level of the water in the drum 3.

[0073] The higher the water level in the drum 3, the better the dehydration effect on the coal slime, but the greater the energy consumption; the lower the water level in the drum 3, the worse the dehydration effect on the coal slime, but the lower the energy consumption.

[0074] Embodiment 8:

[0075] like Figure 1-7 As shown, this embodiment discloses a method for using a coal slime solid-liquid separation device, which uses any of the coal slime solid-liquid separation devices of the aforementioned embodiments 1 to 7, including the following steps:

[0076] The position of the stopper 13 on the rotating shaft 4 is adjusted so that the pressure of the extrusion plate 7 on the ring plate 8 reaches a set value.

[0077] The rotating drum 3 and the rotating shaft 4 are driven by an external power mechanism to rotate in the same direction, and there is a speed difference between the rotating speed of the rotating drum 3 and the rotating shaft 4 .

[0078] Coal slurry is fed into the chute 18 and enters the drum 3 through the discharge hole 11 .

[0079] The working process and principle of this embodiment are:

[0080] The coal slime in the water-containing coal slime adheres to the inner wall of the rotating drum 3 under the action of centrifugal force, and a coal slime ring layer adhered to the inner wall of the rotating drum 3 and a water ring layer adhered to the coal slime ring layer are formed in the rotating drum 3. The spiral blades 9 push the coal slime to move toward the openings on the inner wall of the conical cylinder section to achieve separation of the coal slime and water. Then, the spiral blades 9 cause the coal slime on the inner wall of the conical cylinder section to push open the extrusion plate 7 and leave from the gap between the extrusion plate 7 and the ring plate 8, thereby achieving extrusion dehydration of the coal slime. The water in the straight cylinder section continuously overflows through the drainage hole 5.

[0081] The smaller the distance between the stopper 13 and the extrusion plate 7, the greater the extrusion force of the elastic member 14 on the extrusion plate 7, the higher the temperature that the water in the coal slime between the extrusion plate 7 and the ring plate 8 can reach, the greater the evaporation of water in the coal slime, and the greater the energy consumption of the coal slime solid-liquid separation equipment.

[0082] Embodiment 9:

[0083] like Figure 5 As shown, this embodiment discloses a coal slime solid-liquid separation device, and its steps are substantially the same as those of the eighth embodiment, except that this embodiment further includes the following steps:

[0084] The heating assembly 16 is operated.

[0085] When the coal slime is in the gap between the extrusion plate 7 and the ring plate 8, the temperature of the coal slime is 101°C-120°C, and the temperature of the extrusion plate 7 is not higher than 270°C.

[0086] The working process and principle of this embodiment are:

[0087] During the process of extrusion and dehydration of the coal slime by the extrusion plate 7 and the ring plate 8, the coal slime is heated so that the temperature of the coal slime exceeds the boiling point of water in the environment. After the coal slime escapes from the gap between the extrusion plate 7 and the ring plate 8, part of the water in the coal slime instantly evaporates into steam, causing the coal slime to disperse, thereby achieving evaporation and dehydration of the coal slime and further reducing the water content in the coal slime.

[0088] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A coal slime solid-liquid separation device, comprising a bracket (2) and a rotating shaft (4), wherein a rotating drum (3) is mounted on the bracket (2), wherein the rotating drum (3) comprises a straight section and a conical section, wherein one end of the rotating shaft (4) is provided with a feed trough (18) along its axial direction, and a plurality of discharge holes (11) connected to the feed trough (18) are provided on the outer peripheral side of the rotating shaft (4), characterized in that: Both ends of the rotating shaft (4) pass through the rotating drum (3) and extend outside the rotating drum (3); the discharge hole (11) is located inside the rotating drum (3); and a spiral blade (9) is fixed to the position of the rotating shaft (4) inside the rotating drum (3); The conical cylinder section is provided with an opening at a position away from the straight cylinder section, a ring plate (8) is fixedly installed on the outside of the opening, an extrusion plate (7) is slidably installed on the rotating shaft (4), and the extrusion plate (7) is located outside the rotating cylinder (3), the extrusion plate (7) and the ring plate (8) are in close contact, a position-adjustable stopper (13) is fixed on the rotating shaft (4), an elastic member (14) is installed between the stopper (13) and the extrusion plate (7), and a plurality of drainage holes (5) are provided at equal angles around the central axis of the straight cylinder section at a position away from the conical cylinder section; A heating component (16) is fixed to the extrusion plate (7) at a position away from the ring plate (8), and the extrusion plate (7) is made of metal; The drum (3) and the shaft (4) are driven by an external power mechanism to rotate in the same direction, and there is a speed difference between the rotation speed of the drum (3) and the rotation speed of the shaft (4). Water-containing coal sludge is continuously input into the feed trough (18), and the water-containing coal sludge enters the drum (3) through the discharge hole (11). Under the action of centrifugal force, the water-containing coal sludge is divided into a coal sludge annular layer attached to the inner wall of the drum (3) and a water annular layer attached to the coal sludge annular layer. The spiral blades (9) push the coal sludge to move toward the opening on the inner wall of the conical cylinder section, and the coal sludge on the inner wall of the conical cylinder section pushes the extrusion plate (7) and leaves from the gap between the extrusion plate (7) and the annular plate (8). The water in the straight cylinder section continuously overflows through the drainage hole (5). When the coal slime is in the gap between the extrusion plate (7) and the ring plate (8), the temperature of the coal slime is 101° C.-120° C., and the temperature of the extrusion plate (7) is not higher than 270° C.

2. The coal slime solid-liquid separation equipment according to claim 1, characterized in that: It also includes a cover shell (1) fixed on the bracket (2), the rotating drum (3) is located in the cover shell (1), and a coal slime outlet (20) is opened at a position corresponding to the extrusion plate (7) on the bottom side of the cover shell (1), and a water outlet (19) is opened at a position corresponding to the drainage hole (5) on the bottom side of the cover shell (1).

3. The coal slime solid-liquid separation equipment according to claim 2, characterized in that: An air passage (17) is also provided in the rotating shaft (4), and an air outlet (12) and an air inlet (10) connected to the air passage (17) are provided on the rotating shaft (4). The air inlet (10) is located in the rotating drum (3), and the air outlet (12) is located outside the rotating drum (3). The air outlet (12) is arranged close to the coal slime outlet (20).

4. The coal slime solid-liquid separation equipment according to claim 3, characterized in that: A soft or elastic cover tube (15) is sleeved on the rotating shaft (4), the elastic member (14) is located in the cover tube (15), and both ends of the cover tube (15) are fixedly connected to the extrusion plate (7) and the stopper (13), respectively.

5. The coal slime solid-liquid separation equipment according to claim 1, characterized in that: A guide protrusion strip is fixedly provided on the rotating shaft (4), and a sliding slot adapted to the guide protrusion strip is provided on the extrusion plate (7).

6. The coal slime solid-liquid separation equipment according to claim 1, characterized in that: A liquid blocking plate (6) is installed on the straight tube section to block the liquid drainage hole (5).

7. The coal slime solid-liquid separation equipment according to claim 1, characterized in that: The elastic member (14) is a spring sleeved on the rotating shaft (4).

8. A method for using a coal slime solid-liquid separation device, applied to the coal slime solid-liquid separation device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Adjust the position of the stopper (13) on the rotating shaft (4) so ​​that the pressure of the extrusion plate (7) on the ring plate (8) reaches a set value; The rotating drum (3) and the rotating shaft (4) are driven by an external power mechanism to rotate in the same direction, and there is a speed difference between the rotating drum (3) and the rotating shaft (4); Inputting water-containing coal slurry into the feeding chute (18), the water-containing coal slurry enters the rotating drum (3) through the discharge hole (11); The heating component (16) works; When the coal slime is in the gap between the extrusion plate (7) and the ring plate (8), the temperature of the coal slime is 101° C.-120° C., and the temperature of the extrusion plate (7) is not higher than 270° C.

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