Fly ash melting plasma electric arc furnace

Abstract

The utility model discloses a plasma electric arc furnace for melting coal ash, and relates to the technical field of coal ash melting. The furnace comprises a furnace body and a feeding pipe, a feeding port is fixedly formed in the outer side of the furnace body, a feeding assembly is arranged at one end of the feeding pipe, and a rotating assembly is arranged on the side, away from the rotating shaft, of a fixing plate. The rotating shaft is driven by the rotating assembly to continuously and intermittently rotate, the rotating shaft drives the partition plate to rotate, the partition plate drives pulverized coal to be aligned with the discharging port and discharged and fall into the furnace body, the pulverized coal is intermittently added into the furnace body in batches through the feeding port to be melted, and therefore the situation that the electrode burden is increased due to the fact that the pulverized coal is added too much at a time can be avoided, and the purpose of batch feeding is achieved. The movable cylinder is driven to reciprocate through the elastic force of the cam and the reset spring, the movable cylinder drives the sliding column to move in the second sliding groove and the first sliding groove, the sliding column drives the rotating cylinder to rotate by 90 degrees, the rotating cylinder drives the rotating shaft to rotate through the connecting shaft, and therefore the feeding assembly can be controlled to continuously and intermittently rotate, and the purpose of convenient rotation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fly ash melting, in particular to a fly ash melting plasma arc furnace. Background Art

[0002] Ash fusion is a technology that uses high-temperature melting to remove harmful substances contained in gangue and coal. These harmful substances include heavy metals, dioxins, dibenzofurans, etc., which pose a serious threat to the environment and human health. Through ash fusion technology, these harmful substances can be melted at high temperatures and solidified in the ash, thus avoiding environmental pollution. Ash fusion technology can solidify harmful substances in gangue and coal in the ash. At the same time, the silicate substances contained in the ash can be used as one of the raw materials for cement production, thus realizing the resource utilization of gangue and coal. When melting ash, a plasma arc furnace is generally used for melting.

[0003] In existing plasma arc furnaces, coal ash is mostly added into the furnace in large quantities at once. This places a heavy burden on the electrodes during melting, thereby accelerating electrode aging and causing more frequent electrode replacement, thus affecting production efficiency. Utility Model Content

[0004] In order to solve the problem that adding a large amount of fly ash at one time will cause a heavy burden on the electrodes, the purpose of the utility model is to provide a fly ash melting plasma arc furnace.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A fly ash melting plasma arc furnace, comprising a furnace body and a feeding pipe, wherein a feeding port is fixedly provided on the outer side of the furnace body, one end of the feeding pipe is in contact with the feeding port, and a feeding assembly is provided on one end of the feeding pipe, wherein the feeding assembly comprises a fixed plate, which is fixedly mounted on the feeding pipe, a rotating shaft is rotatably mounted on the outer side of the fixed plate, and partitions distributed in an annular array are fixedly provided on the outer side of the rotating shaft, a discharge port is opened on the outer side of the fixed plate, and the discharge port is located between two partitions, a baffle is fixedly provided inside the feeding pipe, the baffle is located at one end of the partition away from the fixed plate and is aligned with the discharge port, and a rotating assembly is provided on the side of the fixed plate away from the rotating shaft, the baffle is driven to rotate by the rotating shaft, so that the baffle drives the pulverized coal to move on the fixed plate, so that the pulverized coal is discharged from the discharge port and enters the feeding port and falls into the furnace body, so that the pulverized coal is intermittently added to the furnace body in batches through the feeding port for melting, thereby avoiding adding too much pulverized coal at one time and increasing the burden on the electrodes.

[0006] The outer cover is fixedly mounted on the fixing plate at a side away from the fixing plate, and a rotating cylinder is rotatably mounted on the interior of the fixing cylinder, and a first slide groove and a second slide groove are respectively provided on the outer side of the rotating cylinder and are arranged in an annular array. A movable cylinder is slidably inserted into the interior of the fixing cylinder, and the movable cylinder is located at the outer side of the rotating cylinder, and the outer side of the movable cylinder rotates through a symmetrically distributed sliding post, and one end of the sliding post is slidably clamped in the first slide groove, and the interior of the feeding pipe is rotatably mounted on the transmission shaft, and the outer side of the transmission shaft is fixedly sleeved with a cam, and the outer side of the cam is in contact with one end of the movable cylinder. The interior of the fixed cylinder is provided with a symmetrically distributed guide groove, and one end of the sliding post is slidably clamped in the guide groove, and the guide groove can keep the sliding post moving stably, and one end of the fixed cylinder movably penetrates a connecting shaft, and one end of the connecting shaft is fixedly connected to one end of the rotating cylinder. The outer wall of the movable cylinder is fixed with a motor, and the end portion of the motor output shaft movably passes through the feed pipe and is fixedly connected to one end of the transmission shaft. The motor can provide power for the transmission shaft to rotate. A return spring is fixedly provided on the inner wall of the movable cylinder, and one end of the return spring is fixedly connected to one side of the limit plate by the elastic force of the return spring. The first slide groove and the second slide groove are staggered and connected to each other, which makes it convenient for the slide column to slide between the first slide groove and the second slide groove.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] 1. The rotating assembly drives the shaft to rotate continuously and intermittently, and the shaft drives the partition to rotate, so that the partition drives the pulverized coal to align with the discharge port and discharge and fall into the furnace body. The pulverized coal is intermittently added to the furnace body in batches through the feed port for melting. This can avoid adding too much pulverized coal at one time and increasing the burden on the electrodes, thereby achieving the purpose of batch feeding;

[0009] 2. The movable cylinder is driven to move back and forth by the cam and the return spring, and the movable cylinder drives the slide column to move in the second slide groove and the first slide groove, so that the slide column drives the rotating cylinder to rotate ninety degrees. The rotating cylinder drives the rotating shaft to rotate through the connecting shaft, so that the feeding assembly can be controlled to rotate continuously and intermittently, thereby achieving the purpose of convenient rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 This is a schematic structural diagram of the utility model.

[0012] Figure 2 This is a cross-sectional schematic diagram of the feed pipe and its connection structure of the utility model.

[0013] Figure 3 This is a schematic diagram of the structure of the rotating assembly of the utility model.

[0014] In the figure: 1. furnace body; 2. feeding assembly; 21. fixed plate; 22. rotating assembly; 221. fixed cylinder; 222. rotating cylinder; 223. first slide groove; 224. slide column; 225. movable cylinder; 226. transmission shaft; 227. cam; 228. second slide groove; 229. limit plate; 2210. connecting shaft; 2211. through groove; 2212. guide groove; 2213. reset spring; 2214. motor; 23. rotating shaft; 24. partition; 25. discharge port; 26. baffle; 3. feed port; 4. feeding pipe. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] Example: Figure 1-3As shown, the utility model provides a fly ash melting plasma arc furnace, including a furnace body 1 and a feeding pipe 4, the feeding pipe 4 is fixedly installed on the base of the electric arc furnace equipment through a support plate, and is connected to an external feeding device through the feeding pipe 4 through a connecting pipe. A feeding port 3 is fixedly provided on the outside of the furnace body 1, one end of the feeding pipe 4 is in contact with the feeding port 3, and a feeding assembly 2 is provided on one end of the feeding pipe 4. The feeding assembly 2 includes a fixed plate 21, the fixed plate 21 is fixedly installed on the feeding pipe 4, a rotating shaft 23 is rotatably installed on the outside of the fixed plate 21, and a partition 24 distributed in a ring array is fixedly provided on the outside of the rotating shaft 23, and a discharge port 25 is opened on the outside of the fixed plate 21. The discharge port 25 is located between the two partitions 24. A baffle 26 is fixedly provided inside the feed pipe 4. The baffle 26 is located at the end of the partition 24 away from the fixed plate 21 and is aligned with the discharge port 25. A rotating assembly 22 is provided on the side of the fixed plate 21 away from the rotating shaft 23. The baffle 26 can prevent the coal powder from directly entering the discharge port 25. The partition 24 is driven to rotate by the rotating shaft 23, so that the partition 24 drives the coal powder to move on the fixed plate 21, so that the coal powder is discharged from the discharge port 25 and enters the feed port 3 and falls into the furnace body 1, so that the coal powder is intermittently added into the furnace body 1 in batches through the feed port 3 for melting, so as to avoid adding too much coal powder at one time and increasing the burden on the electrode.

[0017] The rotating assembly 22 includes a fixed cylinder 221, which is fixedly mounted on the side of the fixed plate 21 away from the rotating shaft 23. A rotating cylinder 222 is rotatably mounted inside the fixed cylinder 221. The outer side of the rotating cylinder 222 is respectively provided with a first slide groove 223 and a second slide groove 228 distributed in a ring array. A movable cylinder 225 is slidably inserted into the interior of the fixed cylinder 221. The movable cylinder 225 is located on the outer side of the rotating cylinder 222. The outer side of the movable cylinder 225 rotates through a symmetrically distributed sliding column 224. One end of the sliding column 224 is slidably clamped in the first slide groove 223. A transmission shaft 226 is rotatably mounted inside the feeding pipe 4. A cam 227 is fixedly sleeved on the outer side of the transmission shaft 226. The outer side of the cam 227 is fixed to the movable cylinder 22 5 is fitted, and the cam 227 is driven to rotate by the transmission shaft 226. The cam 227 rotates and squeezes the movable cylinder 225, so that the movable cylinder 225 moves in the fixed cylinder 221. The movable cylinder 225 drives the sliding post 224 to move. The movable cylinder 225 drives the sliding post 224 to move in the second slide groove 228 and the first slide groove 223. The return spring 2213 drives the movable cylinder 225 to reset through the elastic force. The movable cylinder 225 drives the sliding post 224 to move in the first slide groove 223 and drives the rotating cylinder 222 to rotate, so that the rotating cylinder 222 rotates ninety degrees. The rotating cylinder 222 drives the rotating shaft 23 to rotate through the connecting shaft 2210. In this way, the rotating shaft 23 can be controlled to rotate continuously and intermittently. The interior of the fixed cylinder 221 is provided with symmetrically distributed The guide groove 2212, one end of the slide column 224 is slidably clamped in the guide groove 2212, and the guide groove 2212 can keep the slide column 224 moving stably. One end of the fixed cylinder 221 is movably penetrated by a connecting shaft 2210, and one end of the connecting shaft 2210 is fixedly connected to one end of the rotating cylinder 222. One end of the connecting shaft 2210 movably penetrates the fixed plate 21 and is fixedly connected to one end of the rotating shaft 23. The rotating shaft 23 can be driven to rotate by the connecting shaft 2210. A limiting disk 229 is provided inside the fixed cylinder 221, and a symmetrically distributed through groove 2211 is provided on the outside of the movable cylinder 225. The protrusion of the limiting disk 229 slides through the through groove 2211 and is fixedly connected to the inner wall of the fixed cylinder 221. The through slot 2211 allows the movable cylinder 225 to move on the limiting plate 229 and maintain stable movement. A motor 2214 is fixedly installed on the outer side of the feed pipe 4. The end of the output shaft of the motor 2214 movably passes through the feed pipe 4 and is fixedly connected to one end of the transmission shaft 226. The motor 2214 provides power for the transmission shaft 226 to rotate. A return spring 2213 is fixedly installed on the inner wall of the movable cylinder 225. One end of the return spring 2213 is fixedly connected to one side of the limiting plate 229. The elastic force of the return spring 2213 can drive the movable cylinder 225 to return to its original position. The first slide groove 223 and the second slide groove 228 are staggered and interconnected, which facilitates the sliding of the slide post 224 between the first slide groove 223 and the second slide groove 228.

[0018] Working principle: First, start the external feeding device, so that the external feeding device can feed the coal powder into the feeding pipe 4 through the connecting pipe, and fall between the partitions 24, and then start the motor 2214, so that the motor 2214 starts to work, and the end of the output shaft of the motor 2214 drives the transmission shaft 226 to rotate, and the transmission shaft 226 drives the cam 227 to rotate, and the cam 227 rotates and squeezes the movable cylinder 225, so that the movable cylinder 225 moves in the fixed cylinder 221, and the movable cylinder 225 compresses the return spring 2213, so that the return spring 2213 generates elastic force, and at the same time, the movable cylinder 225 drives the slide column 224 to move, and keeps the slide column 224 stable through the guide groove 2212, and the slide column 224 moves in the second slide groove 228 and drives the rotating cylinder 222 to rotate, and the slide column 22 After moving into the first chute 223, the return spring 2213 drives the movable cylinder 225 to return to its original position through its elastic force. The movable cylinder 225 drives the sliding post 224 to move in the first chute 223 and drives the rotating cylinder 222 to rotate, causing the rotating cylinder 222 to rotate ninety degrees. The rotating cylinder 222 drives the connecting shaft 2210 to rotate, and the connecting shaft 2210 drives the rotating shaft 23 to rotate. In this way, the rotating shaft 23 can be controlled to rotate continuously and intermittently. Then, the rotating shaft 23 drives the partition plate 24 to rotate, so that the partition plate 24 drives the pulverized coal to move on the fixed plate 21 and align with the discharge port 25, so that the pulverized coal is discharged from the discharge port 25 and enters the feed port 3 and falls into the furnace body 1. The pulverized coal is intermittently added to the furnace in batches for melting. In this way, too much pulverized coal added at one time can be avoided to increase the burden on the electrodes, thereby achieving the purpose of batch feeding.

[0019] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A fly ash melting plasma arc furnace, comprising a furnace body (1) and a feed pipe (4), characterized in that: A feed port (3) is fixedly provided on the outside of the furnace body (1), one end of the feed pipe (4) is in contact with the feed port (3), a feeding assembly (2) is provided on one end of the feed pipe (4), the feeding assembly (2) comprises a fixed plate (21), the fixed plate (21) is fixedly installed on the feed pipe (4), a rotating shaft (23) is rotatably installed on the outside of the fixed plate (21), a partition (24) distributed in a ring array is fixedly provided on the outside of the rotating shaft (23), a discharge port (25) is provided on the outside of the fixed plate (21), the discharge port (25) is located between the two partitions (24), a baffle (26) is fixedly provided inside the feed pipe (4), the baffle (26) is located at one end of the partition (24) away from the fixed plate (21) and is aligned with the discharge port (25), and a rotating assembly (22) is provided on the side of the fixed plate (21) away from the rotating shaft (23).

2. The fly ash melting plasma arc furnace according to claim 1, characterized in that: The rotating assembly (22) includes a fixed cylinder (221), which is fixedly mounted on a side of the fixed plate (21) away from the rotating shaft (23); a rotating cylinder (222) is rotatably mounted inside the fixed cylinder (221); a first slide groove (223) and a second slide groove (228) distributed in a ring array are respectively provided on the outer side of the rotating cylinder (222); a movable cylinder (225) is slidably inserted inside the fixed cylinder (221); the movable cylinder (225) is located on the outer side of the rotating cylinder (222); a symmetrically distributed sliding column (224) is rotatably penetrated on the outer side of the movable cylinder (225); one end of the sliding column (224) is slidably clamped in the first slide groove (223); a transmission shaft (226) is rotatably mounted inside the feeding pipe (4); a cam (227) is fixedly sleeved on the outer side of the transmission shaft (226); the outer side of the cam (227) is in contact with one end of the movable cylinder (225).

3. The fly ash melting plasma arc furnace according to claim 2, characterized in that: The interior of the fixed cylinder (221) is provided with symmetrically distributed guide grooves (2212), and one end of the sliding column (224) is slidably clamped in the guide groove (2212).

4. The fly ash melting plasma arc furnace according to claim 2, characterized in that: One end of the fixed cylinder (221) is movably penetrated by a connecting shaft (2210), one end of the connecting shaft (2210) is fixedly connected to one end of the rotating cylinder (222), and one end of the connecting shaft (2210) is movably penetrated by a fixed plate (21) and is fixedly connected to one end of the rotating shaft (23).

5. The fly ash melting plasma arc furnace according to claim 2, characterized in that: A limiting plate (229) is provided inside the fixed cylinder (221), and symmetrically distributed through grooves (2211) are provided on the outside of the movable cylinder (225). The protrusions of the limiting plate (229) slide through the through grooves (2211) and are fixedly connected to the inner wall of the fixed cylinder (221).

6. The fly ash melting plasma arc furnace according to claim 2, characterized in that: A motor (2214) is fixedly provided on the outside of the feeding pipe (4), and the end of the output shaft of the motor (2214) movably passes through the feeding pipe (4) and is fixedly connected to one end of the transmission shaft (226).

7. The fly ash melting plasma arc furnace according to claim 5, characterized in that: A return spring (2213) is fixedly provided on the inner wall of the movable cylinder (225), and one end of the return spring (2213) is fixedly connected to one side of the limiting plate (229).

8. The fly ash melting plasma arc furnace according to claim 2, characterized in that: The first chute (223) and the second chute (228) are staggered and interconnected.

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