Black water drying centrifugal machine

Abstract

The utility model relates to the field of coal water slurry gasification black water separation, in particular to a black water drying centrifugal machine, a built-in cavity which is separated left and right is arranged in an inner cavity of a spiral, inner cavities on two sides of the built-in cavity are respectively connected with an air heater and a feeding pipe, and a through hole communicated with an inner cavity of a rotary drum is arranged on the built-in cavity. The centrifugal machine has the beneficial effects that hot air with the high temperature is fed into the centrifugal machine through the hot air blower, most of the hot air is discharged from the solid-phase material opening along the propeller blades, in the process, the materials are tightly attached to the inner wall of the rotary drum to move towards the discharging opening, and the materials are discharged out of the discharging opening; the hot air flows above the materials to heat and blow-dry the materials, so that the water content of the materials is further reduced, the temperature of the hot air is gradually reduced, the hot air carries water vapor and is discharged out of the centrifugal machine through the exhaust pipe, the water content of the centrifuged coal slime is improved, and continuous black water centrifugal treatment is achieved.

Description

Technical Field

[0001] The utility model relates to the field of black water separation in coal water slurry gasification, and particularly relates to a black water drying centrifuge. Background Technique

[0002] At present, the fine slag separation equipment for pressurized coal water slurry gasification generally adopts a horizontal screw centrifuge or a plate and frame filter press. The principles of the two devices are different, and the operation methods are also different. According to the different characteristics of the processed materials, the water content of the discharged materials after separation is also different. The water content of the discharged materials of the centrifuge used to process coal water slurry slag water can generally reach about 55%, and the water content of the discharged materials for processing coal washing water can reach below 50%.

[0003] If the water content of the discharged materials is too high, there will be a dripping phenomenon. When stored on site, the ground of the slag shed is very easy to accumulate water. When transported by truck, a waterproof cloth needs to be laid in the truck hopper or the materials need to be dried on site for a period of time before loading and transporting. Although the horizontal screw centrifuge can continuously feed materials, the stable operation point is relatively narrow, and the dehydration effect is easily affected by factors such as furnace shutdown, load increase and decrease, and coal type change. The actual water content of the coal slime is often higher than that of the filter press. Content of the Utility Model

[0004] The purpose of the utility model is to provide a black water drying centrifuge to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A black water drying centrifuge includes a centrifuge. The centrifuge includes a rotating drum rotatably installed, a screw rotatably installed in the inner cavity of the drum, paddle blades are arranged on the outer wall of the screw, the screw and the drum are differentially driven by a motor assembly, a built-in cavity separated left and right is arranged in the inner cavity of the screw, both sides of the built-in cavity are respectively connected to a hot air blower and a feed pipe, through holes communicating with the inner cavity of the drum are arranged on the built-in cavity, and discharge assemblies for discharging hot air, solid materials and clear liquid materials are respectively arranged on both sides of the drum.

[0007] Preferably, the centrifuge includes an inner frame and an outer frame. The inner frame includes a left frame and a right frame. Both ends of the drum respectively penetrate through the left frame and the right frame, and both ends of the drum are rotatably installed on the outer frame through outer bearings.

[0008] Preferably, the screw is located in the inner cavity of the drum, and a gap is left between the paddle blades and the inner wall of the drum. Both ends of the screw are rotatably installed at both ends of the drum through inner bearings.

[0009] Preferably, a partition is vertically arranged in the middle of the inner cavity of the built-in cavity. A plurality of through holes are distributed on both sides of the partition. The output end of the hot air blower is connected with an air inlet pipe, which extends to one side of the built-in cavity. The feed pipe is located on the other side of the built-in cavity separated by the partition, and the feed pipe is externally connected to a raw material pump.

[0010] Preferably, the motor assembly includes a first motor and a second motor. There is a differential speed between the rotational speeds output by the first motor and the second motor. The end of the screw is provided with an extension arm that penetrates the drum and extends to the outside of the drum. Pulley wheels are arranged at the ends of the drum and the extension arm, and the pulley wheels are connected to the motor assembly through a transmission belt.

[0011] Preferably, the discharge assembly includes an exhaust pipe, a solid-phase discharge channel, and an overflow port. Through holes are respectively arranged at the upper and lower ends of one end of the drum close to the left frame. An exhaust pipe communicating with the through hole at the upper end of the drum is arranged at the upper end of the left frame. A solid-phase discharge channel communicating with the through hole at the lower end of the drum is arranged at the lower end of the left frame. An overflow port is arranged at the other end of the drum. A clear liquid flow channel communicating with the overflow port is arranged on the right frame.

[0012] Preferably, the ends of the drum and the screw away from the overflow port are set to be conical, and the inner diameter of the cone is smaller than the inner diameter of the end of the drum close to the overflow port.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the hot air blower sends hot air with a relatively high temperature into the centrifuge. Most of the hot air is discharged from the solid-phase material outlet along the propeller blades. During this process, the material closely adheres to the inner wall of the drum and moves towards the discharge port. The hot air flows above the material, playing a role in heating and drying the material, further reducing the water content of the material. The temperature of the hot air gradually decreases and carries water vapor out of the centrifuge through the exhaust pipe, thereby improving the water content of the coal slime after centrifugation and realizing continuous black water centrifugation treatment. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a schematic diagram of the differential drive structure of the present utility model.

[0017] In the figure: 1, left frame; 2, right frame; 3, drum; 4, screw; 5, blade; 6, built-in cavity; 7, partition; 8, inner bearing; 9, outer bearing; 10, outer frame; 11, feed pipe; 12, hot air blower; 13, air inlet pipe; 14, extension arm; 15, pulley wheel; 16, first motor; 17, transmission belt; 18, second motor; 19, exhaust pipe; 20, solid-phase discharge channel; 21, clear liquid flow channel; 22, through hole; 23, overflow port. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 2 , the present invention provides a technical solution:

[0020] Embodiment 1: A black water drying centrifuge, including a centrifuge, the centrifuge includes a rotating drum 3 rotatably installed, a screw 4 is rotatably installed in the inner cavity of the drum 3, a paddle 5 is arranged on the outer wall of the screw 4, the screw 4 and the drum 3 are differentially driven by a motor assembly, a built-in cavity 6 separated left and right is arranged in the inner cavity of the screw 4, both sides of the built-in cavity 6 are respectively connected to a hot air blower 12 and a feed pipe 11, a through hole 22 communicating with the inner cavity of the drum 3 is arranged on the built-in cavity 6, and discharge assemblies for discharging hot air, solid-phase materials and clear liquid materials are respectively arranged on both sides of the drum 3.

[0021] Working principle: First, use the feed pipe 11 to continuously input black water into the inner cavity of the drum 3, use the hot air blower 12 to continuously introduce hot air into the drum 3, by setting the separated built-in inner cavity 6, so as to avoid the mutual interference between feeding and air inlet, use the through hole 22 to convey the hot air and black water into the inner cavity of the drum 3, and then under the rotation of the paddle 5, the materials closely adhere to the inner wall of the drum 3 and move towards one end, the hot air flows above the materials, playing a role in heating and drying the materials, further reducing the water content of the materials, the temperature of the hot air gradually decreases, and the water vapor is discharged from the exhaust pipe 19 out of the centrifuge, the filtered clear liquid remains in the inner cavity of the drum 3, and as the water level rises, the clear liquid overflows and discharges to the other side.

[0022] Embodiment 2: On the basis of Embodiment 1, in order to realize the rotational installation and differential drive of the screw 4 and the drum 3.

[0023] The centrifuge includes an inner frame and an outer frame 10, the inner frame includes a left frame 1 and a right frame 2, both ends of the drum 3 respectively penetrate through the left frame 1 and the right frame 2, both ends of the drum 3 are rotatably installed on the outer frame 10 through outer bearings 9, the screw 4 is located in the inner cavity of the drum 3, and there is a gap between the paddle 5 and the inner wall of the drum 3, both ends of the screw 4 are rotatably installed at both ends of the drum 3 through inner bearings 8.

[0024] By setting the inner product to support both ends of the drum 3, through the cooperation of the inner bearing 8 and the outer bearing 9, the relative rotational installation of the drum 3 and the screw 4 is realized.

[0025] The motor assembly includes a first motor 16 and a second motor 18. There is a differential speed between the rotational speeds output by the first motor 16 and the second motor 18. An extension arm 14 is provided at the end of the screw 4, which penetrates through the drum 3 and extends to the outside of the drum 3. Pulley 15 is provided at the ends of both the drum 3 and the extension arm 14, and the pulley 15 is connected to the motor assembly through a transmission belt 17.

[0026] By setting the extension arm 14, the relative independent drive of the screw 4 and the drum 3 is realized. Then, the rotational drive is realized by using the motor assembly, the transmission belt 17 and the pulley 15. By setting the rotational differential, the relative rotation of the screw 4 and the drum 3 is realized, and the screw rotation extrusion efficiency of the blade 5 is improved.

[0027] Embodiment 3: On the basis of Embodiment 2, in order to realize the relative independent discharge of gas, solid and liquid, a partition plate 7 is vertically arranged in the middle of the inner cavity of the built-in cavity 6. Multiple groups of through holes 22 are distributed on both sides of the partition plate 7. The output end of the hot air blower 12 is connected with an air inlet pipe 13, and the air inlet pipe 13 extends to one side of the built-in cavity 6. The feed pipe 11 is located on the other side of the built-in cavity 6 separated by the partition plate 7, and the feed pipe 11 is externally connected to a raw material pump.

[0028] By setting the partition plate 7, the built-in cavity 6 is hermetically separated to avoid the mutual influence between air inlet and feeding. The drum 3 inner cavity is continuously fed through the feed pipe 11, and hot air is continuously fed into the drum 3 inner cavity through the air inlet pipe 13, so as to form a continuous centrifugal separation process.

[0029] The discharge assembly includes an exhaust pipe 19, a solid-phase discharge channel 20 and an overflow port 23. Through holes are respectively arranged at the upper and lower ends of one end of the drum 3 close to the left frame 1. The exhaust pipe 19 communicating with the upper through hole of the drum 3 is arranged at the upper end of the left frame 1, and the solid-phase discharge channel 20 communicating with the lower through hole of the drum 3 is arranged at the lower end of the left frame 1. An overflow port 23 is arranged at the other end of the drum 3, and a clear liquid flow channel 21 communicating with the overflow port 23 is arranged on the right frame 2.

[0030] By arranging the exhaust pipe 19 at the upper end of the left frame 1, the air flow with reduced temperature and carrying water vapor is discharged along the exhaust pipe 19, which is convenient for realizing continuous air intake. By setting the solid-phase discharge channel 20, the filtered solid coal slime is discharged downward, and the residual clear liquid after pressure filtration is discharged along the right frame 2 by using the overflow port 23, so as to realize the independent discharge of gas, solid and liquid.

[0031] Embodiment 4: On the basis of Embodiment 3, in order to further improve the separation quality and avoid the reverse overflow of the clear liquid, the ends of the drum 3 and the screw 4 far from the overflow port 23 are set to be conical, and the inner diameter of the cone is smaller than the inner diameter of the end of the drum 3 close to the overflow port 23.

[0032] By setting one end of the solid-phase discharge channel 20 to be conical, the gap between the blades 5 is reduced, the extrusion force on the solid is increased, thereby improving the quality of solid-liquid separation. At the same time, by setting it to be conical, an upwardly inclined inner wall is formed, so that the remaining clear liquid can only flow towards the overflow port 23 on the other side, avoiding the reverse overflow of the clear liquid.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A black water drying centrifuge, comprising a centrifuge, wherein the centrifuge comprises a rotatably mounted drum (3), a spiral (4) is rotatably mounted in the inner cavity of the drum (3), and a blade (5) is arranged on the outer wall of the spiral (4), characterized in that: The screw (4) and the drum (3) are differentially driven by a motor assembly; a left- and right-divided built-in cavity (6) is provided in the inner cavity of the screw (4); the inner cavities on both sides of the built-in cavity (6) are respectively connected to a hot air blower (12) and a feed pipe (11); a through hole (22) communicating with the inner cavity of the drum (3) is provided on the built-in cavity (6); and discharge assemblies for discharging hot air, solid phase materials and clear liquid materials are respectively provided on both sides of the drum (3).

2. A black water drying centrifuge according to claim 1, characterized in that: The centrifuge comprises an inner frame and an outer frame (10), wherein the inner frame comprises a left frame (1) and a right frame (2), and the two ends of a rotating drum (3) respectively penetrate the left frame (1) and the right frame (2), and the two end portions of the rotating drum (3) are rotatably mounted on the outer frame (10) via external bearings (9).

3. A black water drying centrifuge according to claim 2, characterized in that: The spiral (4) is located in the inner cavity of the drum (3), and a gap is left between the blade (5) and the inner wall of the drum (3). The two ends of the spiral (4) are rotatably mounted on the two ends of the drum (3) through inner bearings (8).

4. The black water drying centrifuge according to claim 2, characterized in that: A partition (7) is vertically arranged in the middle of the inner cavity of the built-in cavity (6), and a plurality of groups of through holes (22) are distributed on both sides of the partition (7). The output end of the hot air blower (12) is connected to an air intake pipe (13), and the air intake pipe (13) extends to one side of the built-in cavity (6). The feed pipe (11) is located on the other side of the built-in cavity (6) separated by the partition (7), and the feed pipe (11) is externally connected to a raw material pump.

5. The black water drying centrifuge according to claim 1, characterized in that: The motor assembly comprises a first motor (16) and a second motor (18), the rotation speeds output by the first motor (16) and the second motor (18) are differential, an end of the spiral (4) is provided with an extension arm (14) penetrating the rotating drum (3) and extending to the outside of the rotating drum (3), and the ends of the rotating drum (3) and the extension arm (14) are both provided with pulleys (15), and the pulleys (15) are connected to the motor assembly via a transmission belt (17).

6. The black water drying centrifuge according to claim 4, characterized in that: The discharge assembly comprises an exhaust pipe (19), a solid phase discharge flow channel (20) and an overflow port (23); the upper and lower ends of the drum (3) close to the left side frame (1) are respectively provided with through holes; the upper end of the left side frame (1) is provided with an exhaust pipe (19) connected to the through hole at the upper end of the drum (3); the lower end of the left side frame (1) is provided with a solid phase discharge flow channel (20) connected to the through hole at the lower end of the drum (3); the other end of the drum (3) is provided with an overflow port (23); and the right side frame (2) is provided with a clear liquid flow channel (21) connected to the overflow port (23).

7. The black water drying centrifuge according to claim 6, characterized in that: The ends of the drum (3) and the spiral (4) away from the overflow port (23) are arranged in a cone shape, and the inner diameter of the cone is smaller than the inner diameter of the end of the drum (3) close to the overflow port (23).

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