Lime slaking machine feeding device and method

Abstract

The invention belongs to the technical field of lime slakers, and particularly relates to a lime slaker feeding device and method.The device comprises a base, a water tank, a feeding box body, a feeding cone, an ash melting barrel and a driving mechanism; the feeding device further comprises a feeding mechanism and an ash removal mechanism, the feeding mechanism is arranged in the feeding box body, and the ash removal mechanism is arranged in the feeding box body; the lime slaking machine solves the problems that when an existing lime slaking machine carries out slaking reaction, quicklime is prone to blocking a feeding port, and ash-containing hot steam and unslaked ash powder generated in the reaction are prone to overflowing to cause environmental pollution; according to the lime slaking machine, when the lime slaking machine is used for slaking reaction, the feeding port cannot be blocked, ash-containing hot steam and unslaked ash powder which are generated during reaction can be removed, leakage of the ash powder is reduced, environmental pollution is avoided, and meanwhile, the efficiency of the slaking reaction is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lime digesters, and in particular relates to a feeding device and method for a lime digester. Background Art

[0002] Lime digestion machine is a device that digests quicklime burned in lime kiln with lime water to generate lime milk, which is used for the next ammonia distillation process. The front feed port of lime digestion machine is connected with the feed device, and the existing feed device mainly consists of water inlet and ash inlet. Quicklime falls from the upper part of the ash inlet, and the lime water enters the lime digestion machine from the center of the ash inlet pipe through the water inlet branch pipe.

[0003] The feeding device of the lime digester is an important component of the lime digester. It is installed at the front end of the feeding cone section. Its function is to transport the calcined quicklime and the lime water with a temperature of about 60°C to the rotary cylinder of the lime digester. When working, the feeding device remains stationary, and there is relative movement between the rotary cylinder of the lime digester and the feeding device.

[0004] However, in the actual working process of the lime digester feeding device, there are the following problems: 1. There is a horizontal section at the bottom of the feed pipe. After water enters from the middle, the quicklime cannot be washed away immediately, causing some quicklime to accumulate in the pipe, blocking the feed port and reducing the digestion reaction efficiency.

[0005] 2. When the lime digester is working, due to the high heat of reaction, a large part of the ash-containing hot steam will overflow from the feed end of the lime digester head, spraying out undigested ash powder, causing environmental pollution.

[0006] 3. The feeding device is fixedly installed on one side of the lime digester, while the cylinder and cone of the lime digester are rotating. The feeding device extends into the cylinder. There is a gap between the feeding elbow and the cylinder wall. An ash retaining ring is simply welded at the gap. During operation, as the cylinder rotates, a small amount of ash milk always overflows out of the lime digester, causing dust accumulation on the factory floor and polluting the environment.

[0007] Therefore, the present invention provides a lime digester feeding device and method. Summary of the invention

[0008] The purpose of the present invention is to solve the problem that the quicklime is easy to block the feed port of the existing lime digester during the digestion reaction, and the ash-containing hot steam and undigested ash powder generated during the reaction are easy to overflow, causing environmental pollution; the lime digester will not block the feed port during the digestion reaction, the ash-containing hot steam and undigested ash powder generated during the reaction will be removed, the leakage of ash powder is reduced, and environmental pollution is avoided. At the same time, the efficiency of the digestion reaction is greatly improved.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: A feeding device for a lime digester comprises: a base, a water tank, a feeding box, a feeding cone, a ash dissolving cylinder and a driving mechanism; the base is provided with a water tank, a feeding box, a feeding cone and a ash dissolving cylinder in sequence; the driving mechanism is arranged between the water tank and the feeding box, a feeding port is arranged on one side of the feeding box, and a water inlet branch pipe is arranged on one side of the water tank; It also includes a feeding mechanism and an ash removal mechanism, wherein the feeding mechanism is arranged inside the feeding box, the ash removal mechanism is arranged inside the feeding box, and the ash removal mechanism is located above the feeding mechanism; The feeding mechanism drives the material and the water in the water tank to enter the ash-removing cylinder at the same time through the driving mechanism for digestion reaction, and removes the ash-containing hot steam through the ash removal mechanism.

[0010] Preferably, the feeding mechanism includes a hollow rotating shaft, a connecting pipe, a spiral piece and a spiral auger. One end of the hollow rotating shaft passes through the feeding box and is connected to the water tank through the connecting pipe, and the other end extends to the interior of the ash-burning cylinder. A spiral auger is provided at one end of the hollow rotating shaft, and the spiral auger is located inside the connecting pipe. A spiral piece for driving the movement of materials is provided on the outside of the hollow rotating shaft.

[0011] Preferably, the ash removal mechanism includes a partition, a water pipe, a nozzle, a first heat conduction plate, a second heat conduction plate and a return pipe; the partition is arranged inside the feed box, and multiple nozzles are respectively arranged in linear arrays on the multiple water pipes, and the multiple nozzles pass through the top of the feed box, multiple first heat conduction plates are arranged on the top of the feed box, and the multiple first heat conduction plates and the multiple nozzles are arranged at intervals, multiple second heat conduction plates are arranged on the top of the partition, and a rectangular through hole for reflux is opened at the connection between the second heat conduction plate and the partition, and the first heat conduction plate and the second heat conduction plate are arranged at intervals, and one end of the return pipe is connected to the feed box, and the other end is connected to the water tank.

[0012] Preferably, the starting end of the partition is connected to the inner wall of one side of the feed box, and the ending end leaves a gap with the inner wall of the other side of the feed box for the passage of ash-containing hot steam. The thickness of the partition gradually increases from the starting end to the ending end to form an inclined slope, and a blocking block is provided at the top of the ending end of the partition.

[0013] Preferably, the driving mechanism comprises a motor, a first rotating wheel, a negative pressure component and a belt, the motor is arranged on the base, the hollow rotating shaft is driven to rotate by the motor, the first rotating wheel is coaxially arranged on the hollow rotating shaft, and the negative pressure component is arranged on the feed box; The negative pressure component includes: a cylinder, a support frame, a rotating shaft, a second rotating wheel and blades. The support frame is coaxially arranged inside the cylinder, and a rotating shaft passing through the cylinder is arranged at the center of the support frame. The second rotating wheel and blades are respectively arranged at both ends of the rotating shaft; the blades are arranged on the side facing the feed box, and the second rotating wheel is connected to the first rotating wheel on the hollow rotating shaft through a belt.

[0014] Preferably, an extension ring is provided in the cone mouth of the feed cone, a spiral protrusion is provided on the extension ring, a connecting block is radially provided at one end of the extension ring, and the connecting block is connected to the extended end of the hollow rotating shaft.

[0015] A feeding method for a lime digester feeding device comprises the following steps: S1: The quicklime is transported by the spiral blade on the hollow transmission shaft and enters the ash dissolving cylinder. The ash dissolving water is driven by the spiral auger on the hollow transmission shaft, enters the ash dissolving cylinder from the water tank through the hollow transmission shaft, and contacts with the quicklime to undergo a digestion reaction. S2: The ash-containing hot steam and undigested ash powder generated by the digestion reaction are drawn above the partition by the rotation of the blades, and pass between the first heat conducting plate and the second heat conducting plate above the partition, and the ash and undigested ash powder in the ash-containing hot steam are removed by the water mist sprayed from the nozzle; S3: The temperature of the first heat conducting plate increases and transfers heat to the water pipe, so that the temperature of the ash water inside the water pipe increases; S4: The water flow after ash removal will flow back to the water tank through the partition and the return pipe, and then flow into the ash-removing cylinder through the connecting pipe and the hollow rotating shaft.

[0016] Beneficial effects of the present invention: 1. The present invention provides a feeding mechanism on the feeding box. Through the cooperation between the feeding mechanism and the driving mechanism, the feeding mechanism transports quicklime and water separately. The quicklime and water directly enter the ash dissolving cylinder for digestion reaction, which prevents the quicklime and ash dissolving water from contacting and reacting in the feeding box to form ash milk that forms scars and causes accumulation and blockage, thereby greatly improving the efficiency of the digestion reaction.

[0017] 2. The present invention provides a partition inside the feeding mechanism, and through the cooperation between the driving mechanism and the negative pressure component, the motor drives the blades to rotate, and the ash-containing hot steam inside the shell is extracted, and the ash-containing hot steam is deashed through the nozzle above the partition to remove the undigested ash powder, thereby reducing the leakage of ash powder and avoiding environmental pollution. At the same time, the heat in the ash-containing hot steam is effectively utilized to heat the ash water, thereby further improving the deashing effect.

[0018] 3. The present invention provides a spiral protrusion on the feed cone, so that during the rotation of the cylinder, a small amount of ash paste is blocked from overflowing through the gap between the feed box and the feed cone, thereby avoiding environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0020] Figure 2 It is a top view of the present invention as a whole.

[0021] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the present invention as a whole.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the spiral auger, the hollow rotating shaft and the spiral blades of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the feeding cone of the present invention.

[0024] Figure 6 It is a schematic diagram of the internal three-dimensional structure of the present invention as a whole from another perspective.

[0025] In the figure: 1. base; 2. water tank; 21. water inlet branch pipe; 3. feed box; 31. feed port; 4. feed cone; 41. extension ring; 42. spiral protrusion; 43. connecting block; 5. ash-removing cylinder; 6. driving mechanism; 61. motor; 62. first rotor; 63. negative pressure assembly; 631. cylinder; 632. support frame; 633. rotating shaft; 634. second rotor; 635. blade; 64. belt; 7. feed mechanism; 71. hollow rotating shaft; 72. connecting pipe; 73. spiral sheet; 74. spiral auger; 8. ash removal mechanism; 81. partition; 811. starting end; 812. end end; 813. gap; 814. blocking block; 82. water pipe; 83. nozzle; 84. first heat conduction plate; 85. second heat conduction plate; 86. return pipe; 87. rectangular through hole. DETAILED DESCRIPTION

[0026] The method for using the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figures 1 to 6 As shown, a feeding device for a lime digester comprises: a base 1, a water tank 2, a feeding box body 3, a feeding cone 4, a ash dissolving cylinder body 5 and a driving mechanism 6; the water tank 2, the feeding box body 3, the feeding cone 4 and the ash dissolving cylinder body 5 are sequentially arranged on the base 1; the driving mechanism 6 is arranged between the water tank 2 and the feeding box body 3, a feeding port 31 is arranged on one side of the feeding box body 3, and a water inlet branch pipe 21 is arranged on one side of the water tank 2; It also includes a feeding mechanism 7 and a dust removal mechanism 8, wherein the feeding mechanism 7 is arranged inside the feeding box 3, the dust removal mechanism 8 is arranged inside the feeding box 3, and the dust removal mechanism 8 is located above the feeding mechanism 7; The feeding mechanism 7 drives the material and the water in the water tank 2 to enter the ash-removing cylinder 5 through the driving mechanism 6 for digestion reaction, and removes the ash-containing hot steam through the ash removal mechanism 8.

[0028] The material and water are separated by the feeding mechanism 7 so that the two react inside the ash-removing cylinder 5, thereby avoiding the accumulation of some raw stones inside the feeding box 3 and clogging the feeding box 3. At the same time, a large amount of ash-containing hot steam will be generated during the digestion reaction. The generated ash-containing hot steam will be extracted by the ash removal mechanism 8 and enter the ash removal mechanism 8. The ash-containing hot steam is ash-removed by water mist. The air after ash removal will be discharged, and the generated water flow and sediment will flow back to the water tank 2 through the reflux pipe 86 for recycling.

[0029] like Figure 3 and Figure 4 As shown, the feeding mechanism 7 includes a hollow rotating shaft 71, a connecting pipe 72, a spiral piece 73 and a spiral auger 74. One end of the hollow rotating shaft 71 passes through the feeding box 3 and is connected to the water tank 2 through the connecting pipe 72, and the other end extends to the inside of the ash dissolving cylinder 5; a spiral auger 74 is provided at one end of the hollow rotating shaft 71, and the spiral auger 74 is located inside the connecting pipe 72, and a spiral piece 73 for pushing the material to move is provided on the outside of the hollow rotating shaft 71. The hollow rotating shaft 71 and the spiral piece 73 are connected by a plurality of connecting rods. After the hollow rotating shaft 71 rotates through the spiral piece 73 to push the material to move and perform a digestion reaction, the generated ash-containing hot steam can enter the inside of the ash removal mechanism 8 through the connecting rod between the spiral piece 73 and the hollow rotating shaft 71, thereby removing the ash-containing hot steam.

[0030] When the hollow rotating shaft 71 is driven by the motor 61 and rotates, the hollow rotating shaft 71 will drive the spiral piece 73 to rotate and push the material inside the feed box 3 into the ash dissolving cylinder 5. At the same time, the hollow rotating shaft 71 will drive the spiral auger 74 to rotate in the connecting pipe 72 and push the water flow inside the water tank 2 into the connecting pipe 72, and flow out through the other end of the hollow rotating shaft 71, and perform a digestion reaction inside the ash dissolving cylinder 5. It should be noted that the pushed-in material and the discharged water can be adjusted according to the size of the spiral piece 73, the size of the spiral auger 74, the diameter of the hollow rotating shaft 71 and the speed of rotation, so as to ensure that the volume of the material entering and the volume of the water are mixed in proportion, so that the digestion reaction reaches the best state. Prevent large pieces of quicklime from clogging in the feed box 3. The spiral piece 73 rotates at a uniform speed to ensure the continuity of quicklime feeding.

[0031] like Figure 3 and Figure 6 As shown, the ash removal mechanism 8 includes a partition 81, a water pipe 82, a nozzle 83, a first heat conducting plate 84, a second heat conducting plate 85 and a return pipe 86; the partition 81 is arranged inside the feed box 3, and a plurality of nozzles 83 are respectively arranged in a linear array on the plurality of water pipes 82, and the plurality of nozzles 83 pass through the top of the feed box 3, a plurality of the first heat conducting plates 84 are arranged on the top of the feed box 3, and the plurality of first heat conducting plates 84 and the plurality of nozzles 83 are arranged at intervals, a plurality of the second heat conducting plates 85 are arranged on the top of the partition 81, a rectangular through hole 87 for reflux is opened at the connection between the second heat conducting plate 85 and the partition 81, and the first heat conducting plate 84 and the second heat conducting plate 85 are arranged at intervals, and one end of the return pipe 86 is connected to the feed box 3, and the other end is connected to the water tank 2.

[0032] The first heat conducting plate 84 and the second heat conducting plate 85 are made of metal materials with good thermal conductivity. The quicklime and the ash-removing water undergo a digestion reaction in the ash-removing cylinder 5, and a large amount of ash-containing hot steam is released in the reaction. Under the action of the negative pressure component 63, the ash-containing hot steam enters the ash removal mechanism 8. The ash-containing hot steam will pass between the first heat conducting plate 84 and the second heat conducting plate 85 and move toward the negative pressure component 63. Since the ash-containing hot steam will contact the first heat conducting plate 84 and the second heat conducting plate 85, and transfer heat to the first heat conducting plate 84 and the second heat conducting plate 85, On the second heat conducting plate 85, at the same time, the nozzle 83 on the water pipe 82 will spray water mist downward, the first heat conducting plate 84 will transfer the temperature to the water pipe 82, so that the temperature of the water flow inside the water pipe 82 increases, and the second heat conducting plate 85 will transfer the temperature to the water mist, so that the temperature of the water mist increases. After the warm water is sprayed, it flows to the starting end 811 through the inclined partition 81, and flows back to the inside of the water tank 2 through the reflux pipe 86. After the warm water recovers heat and ash powder, the temperature increases by about 20°C, and finally flows into the water tank 2 to be used as ash water.

[0033] like Figure 3 and Figure 6 As shown, the starting end 811 of the partition 81 is connected to the inner wall of one side of the feed box 3, and the terminal end 812 and the inner wall of the other side of the feed box 3 leave a gap 813 for the ash-containing hot steam to pass through. The thickness of the partition 81 gradually increases from the starting end 811 to the terminal end 812 to form an inclined slope, and a blocking block 814 is provided on the top of the terminal end 812 of the partition 81. The partition 81 is provided with an inclined blocking block, which forms a funnel shape with the port of the return pipe 86, so that the water flow after ash removal can flow into the return pipe 86 through the diversion of the inclined blocking block, thereby ensuring that the water flow and sediment can smoothly pass through the return pipe 86 and return to the inside of the water tank 2.

[0034] like Figure 2 , Figure 3 and Figure 6As shown, the driving mechanism 6 includes a motor 61, a first rotating wheel 62, a negative pressure component 63 and a belt 64. The motor 61 is arranged on the base 1, and the hollow rotating shaft 71 is driven to rotate by the motor 61. The first rotating wheel 62 is coaxially arranged on the hollow rotating shaft 71, and the negative pressure component 63 is arranged on the feed box 3; It should be noted that a first bevel gear is provided on the motor 61, and a second bevel gear is provided on the hollow rotating shaft 71. Through the mutual engagement of the first bevel gear and the second bevel gear, the power generated by the motor 61 is transmitted to the hollow rotating shaft 71, driving the hollow rotating shaft 71 to rotate.

[0035] like Figure 6 As shown, the negative pressure assembly 63 includes: a cylinder 631, a support frame 632, a rotating shaft 633, a second rotating wheel 634 and a blade 635. The support frame 632 is coaxially arranged inside the cylinder 631, and a rotating shaft 633 passing through the cylinder 631 is arranged at the center of the support frame 632. The second rotating wheel 634 and the blade 635 are respectively arranged at both ends of the rotating shaft 633; ​​the blade 635 is arranged on the side facing the feed box 3, and the second rotating wheel 634 is connected to the first rotating wheel 62 on the hollow rotating shaft 71 through a belt 64.

[0036] The blades 635 on the negative pressure component 63 are driven by the motor 61 to rotate, extract the internal air, and generate negative pressure inside the feed box 3, so that the ash-containing hot steam generated after the digestion reaction is extracted, and the ash in the ash-containing hot steam is removed by the dust removal mechanism.

[0037] like Figure 5 As shown, an extension ring 41 is provided in the cone mouth of the feed cone 4, a spiral protrusion 42 is provided on the extension ring 41, a connecting block 43 is radially provided at one end of the extension ring 41, and the connecting block 43 is connected to the extended end of the hollow rotating shaft 71.

[0038] It should be noted that when the digestion reaction is carried out, the ash-removing cylinder 5 and the feeding cone 4 rotate together, and the feeding cone 4 will rotate on the feeding box 3. During the rotation, the spiral protrusion 42 rotates with the rotation of the ash-removing cylinder 5. The rotating spiral protrusion 42 pushes the ash slurry entering the gap 813 to move to one side of the ash-removing cylinder 5, thereby preventing the ash slurry inside the ash-removing cylinder 5 from overflowing.

[0039] A feeding method for a lime digester feeding device comprises the following steps: S1: The quicklime is pushed and transported by the spiral blade 73 on the hollow transmission shaft and enters the interior of the ash dissolving cylinder 5. The ash dissolving water is driven by the spiral auger 74 on the hollow transmission shaft, enters the interior of the ash dissolving cylinder 5 from the water tank 2 through the hollow transmission shaft, and contacts with the quicklime to cause a digestion reaction; S2: The ash-containing hot steam and undigested ash powder generated by the digestion reaction are drawn into the upper part of the partition 81 by the rotation of the blades 635, and pass between the first heat conducting plate 84 and the second heat conducting plate 85 above the partition 81, and the ash and undigested ash powder in the ash-containing hot steam are removed by the water mist sprayed by the nozzle 83; S3: The temperature of the first heat conducting plate 84 increases, transferring heat to the water pipe 82, so that the temperature of the ash water inside the water pipe 82 increases; S4: The water flow after ash removal will flow back to the inside of the water tank 2 through the partition 81 and the return pipe 86, and then flow into the inside of the ash-removing cylinder 5 through the connecting pipe 72 and the hollow rotating shaft 71.

[0040] Working process: When the digestion reaction is carried out, the quicklime is firstly introduced into the feed box 3 through the feed port 31, and the water will also directly enter the water tank 2 through the water inlet branch pipe 21. At the same time, the motor 61 is started. The rotation of the motor 61 will drive the first bevel gear to rotate, thereby driving the second bevel gear to rotate, and the second bevel gear will drive the hollow rotating shaft 71 to rotate. The hollow rotating shaft 71 will drive the connecting rod and the spiral piece 73 to rotate together, thereby pushing the lime inside the feed box 3 to move, and directly enter the ash-dissolving cylinder 5 through the feed box 3 for digestion reaction. While the hollow rotating shaft 71 rotates, the hollow rotating shaft 71 will also drive the spiral auger 74 to rotate in the connecting pipe 72 through the fixed frame, thereby driving the water inside the box to flow through the hollow rotating shaft 71 and enter the ash-dissolving cylinder 5, and contact with the lime. Due to the rotation of the ash-dissolving cylinder 5, the feeding cone 4 will be driven to rotate together, so that the lime inside reacts with the water.

[0041] The reaction will produce a large amount of ash-containing hot steam. At the same time, the hollow rotating shaft 71 will also drive the first rotating wheel 62 to rotate during the rotation, and transmit the power to the second rotating wheel 634 through the belt 64 to rotate, thereby driving the rotating shaft 633 to rotate. The rotating shaft 633 will drive the blade 635 to rotate, and the air inside the internal shell will be drawn out, and a certain negative pressure will be generated inside the shell. The ash-containing hot steam will pass into the inside of the shell and enter the top of the partition 81. At the same time, the nozzle 83 connected to the water pipe 82 will spray a large amount of water mist downward to remove the ash inside the ash-containing hot steam. When the ash-containing hot steam passes through the partition 81, it will contact the first heat conducting plate 84 and the second heat conducting plate 85 contacts and transfers heat to the first heat conducting plate 84 and the second heat conducting plate 85, so that the temperatures of the first heat conducting plate 84 and the second heat conducting plate 85 increase, and the first heat conducting plate 84 transfers heat to the water pipe 82, so that the temperature of the water flow inside the water pipe 82 increases, thereby further improving the dust removal effect. After the dust removal is completed, the steam will be extracted through the rotation of the blade 635, and the downward water mist will fall on the partition 81, and flow through the rectangular through hole 87 on the second heat conducting plate 85, and flow along the inclined partition 81 to the return pipe 86, and the inclined block will collect the flowing water at the return pipe 86, and flow into the water tank 2 through the return pipe 86, thereby realizing the recycling of water.

[0042] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lime digestion machine feeding device, comprising: A base (1), a water tank (2), a feed box (3), a feed cone (4), an ash dissolving cylinder (5) and a driving mechanism (6); the base (1) is provided with a water tank (2), a feed box (3), a feed cone (4) and an ash dissolving cylinder (5) in sequence; the driving mechanism (6) is arranged between the water tank (2) and the feed box (3); a feed port (31) is provided on one side of the feed box (3); and a water inlet branch pipe (21) is provided on one side of the water tank (2); It is characterized in that it also comprises a feeding mechanism (7) and an ash removal mechanism (8), wherein the feeding mechanism (7) is arranged inside the feeding box (3), the ash removal mechanism (8) is arranged inside the feeding box (3), and the ash removal mechanism (8) is located above the feeding mechanism (7); The feeding mechanism (7) drives the material and the water in the water tank (2) to enter the ash-removing cylinder (5) through the driving mechanism (6) to undergo a digestion reaction, and removes the ash-containing hot steam through the ash removal mechanism (8).

2. A lime digestion machine feeding device according to claim 1, characterized in that: The feeding mechanism (7) comprises a hollow rotating shaft (71), a connecting pipe (72), a spiral piece (73) and a spiral auger (74); one end of the hollow rotating shaft (71) passes through the feeding box (3) and is connected to the water tank (2) via the connecting pipe (72), and the other end extends to the inside of the ash dissolving cylinder (5); a spiral auger (74) is arranged at one end of the hollow rotating shaft (71), and the spiral auger (74) is located inside the connecting pipe (72); and a spiral piece (73) for pushing the material to move is arranged outside the hollow rotating shaft (71).

3. A lime digestion machine feeding device according to claim 1, characterized in that: The ash removal mechanism (8) comprises a partition (81), a water pipe (82), a nozzle (83), a first heat conducting plate (84), a second heat conducting plate (85) and a return pipe (86); the partition (81) is arranged inside the feed box (3); a plurality of nozzles (83) are respectively arranged in a linear array on the plurality of water pipes (82); the plurality of nozzles (83) pass through the top of the feed box (3); a plurality of the first heat conducting plates (84) are arranged on the top of the feed box (3); the plurality of the first heat conducting plates (84) and the plurality of nozzles (83) are arranged at intervals; a plurality of the second heat conducting plates (85) are arranged on the top of the partition (81); a rectangular through hole (87) for return flow is provided at the connection between the second heat conducting plate (85) and the partition (81); the first heat conducting plate (84) and the second heat conducting plate (85) are arranged at intervals; one end of the return pipe (86) is connected to the feed box (3); and the other end is connected to the water tank (2).

4. A lime digestion machine feeding device according to claim 3, characterized in that: The starting end (811) of the partition (81) is connected to the inner wall of one side of the feed box (3), and the terminal end (812) and the inner wall of the other side of the feed box (3) leave a gap (813) for the passage of ash-containing hot steam. The thickness of the partition (81) gradually increases from the starting end (811) to the terminal end (812) to form an inclined slope. A blocking block (814) is provided at the top of the terminal end (812) of the partition (81).

5. A lime digestion machine feeding device according to claim 1, characterized in that: The driving mechanism (6) comprises a motor (61), a first rotating wheel (62), a negative pressure assembly (63) and a belt (64); the motor (61) is arranged on the base (1); the hollow rotating shaft (71) is driven to rotate by the motor (61); the first rotating wheel (62) is coaxially arranged on the hollow rotating shaft (71); and the negative pressure assembly (63) is arranged on the feed box (3); The negative pressure component (63) comprises: a cylinder (631), a support frame (632), a rotating shaft (633), a second rotating wheel (634) and blades (635); the support frame (632) is coaxially arranged inside the cylinder (631); a rotating shaft (633) penetrating the cylinder (631) is arranged at the center of the support frame (632); the second rotating wheel (634) and the blades (635) are respectively arranged at both ends of the rotating shaft (633); the blades (635) are arranged on a side facing the feed box (3); the second rotating wheel (634) is connected to the first rotating wheel (62) on the hollow rotating shaft (71) via a belt (64).

6. A lime digestion machine feeding device according to claim 1, characterized in that: An extension ring (41) is arranged in the cone opening of the feed cone (4), a spiral protrusion (42) is arranged on the extension ring (41), a connecting block (43) is radially arranged at one end of the extension ring (41), and the connecting block (43) is connected to the extended end of the hollow rotating shaft (71).

7. A feeding method according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: quicklime is transported by the spiral blade (73) on the hollow transmission shaft and enters the interior of the ash dissolving cylinder (5); the ash dissolving water is driven by the spiral auger (74) on the hollow transmission shaft, enters the interior of the ash dissolving cylinder (5) from the water tank (2) through the hollow transmission shaft, and contacts with the quicklime to cause a digestion reaction; S2: Ash-containing hot steam and undigested ash powder generated by the digestion reaction are drawn into the upper part of the partition (81) by the rotation of the blades (635), and pass through the first heat conducting plate (84) and the second heat conducting plate (85) above the partition (81), and the ash and undigested ash powder in the ash-containing hot steam are removed by water mist sprayed from the nozzle (83); S3: the temperature of the first heat conducting plate (84) increases, transferring heat to the water pipe (82), thereby increasing the temperature of the ash water inside the water pipe (82); S4: The water flow after ash removal will flow back to the inside of the water tank (2) through the partition plate (81) and the return pipe (86), and then flow into the inside of the ash removal cylinder (5) through the connecting pipe (72) and the hollow rotating shaft (71).

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