A waste heat recovery system of a magnetic core sintering kiln

Abstract

The application provides a waste heat recovery system of a magnetic core sintering kiln, and relates to the field of waste heat recovery of sintering kilns. The waste heat recovery system of the magnetic core sintering kiln comprises a sintering kiln body, an exhaust fan is installed at the top of the sintering kiln body, the input end of the exhaust fan is communicated with the smoke exhaust port of the sintering kiln body, the output end of the exhaust fan is communicated with a smoke exhaust pipe, a heat exchange cylinder is fixedly connected to one side of the sintering kiln body, and a collecting cylinder is arranged at the position close to the top end of the outer surface of the heat exchange cylinder. The first spiral pipe is driven to rotate and move in the inside of the spiral heat exchange pipe, and the second spiral pipe is driven to rotate and move on the outer surface of the spiral heat exchange pipe, so that the first cleaning brush and the second cleaning brush which rotate and move can brush off and clean the flue gas particles or the scale on the inner wall and the outer wall of the spiral heat exchange pipe, the adsorption of a large number of flue gas particles or scale on the inner wall or the outer wall of the spiral heat exchange pipe is avoided, the heat exchange efficiency of the high-temperature flue gas is not affected, and the efficiency of waste heat recovery is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sintering kiln waste heat recovery, in particular to a waste heat recovery system of a magnetic core sintering kiln. BACKGROUND

[0002] Magnetic core refers to a kind of sintered magnetic metal oxide composed of various iron oxide mixtures, for example, manganese-zinc ferrite and nickel-zinc ferrite are typical magnetic core materials;Manganese-zinc ferrite has the characteristics of high magnetic permeability and high magnetic flux density, and has the characteristics of low loss;Nickel-zinc ferrite has the characteristics of extremely high resistivity and less than several hundred low magnetic permeability, ferrite magnetic core is used in the coil and transformer of various electronic equipment, and the magnetic core needs to be sintered by using a sintering kiln during processing.

[0003] The waste heat recovery system of the sintering kiln in the existing market is used for waste heat recovery of high-temperature flue gas generated in the sintering kiln, most of which uses a spiral pipe to exchange heat in the high-temperature flue gas to water, and the waste heat is recovered and utilized by water, in the actual use process, whether the high-temperature flue gas or the water flow exchanges heat from the inside or outside of the spiral pipe, it is easy to cause the inner surface or outer surface of the spiral pipe to adsorb a large number of flue gas particles or scale.

[0004] And most of the existing waste heat recovery equipment does not have the function of cleaning the inner and outer walls of the spiral pipe, after a large number of flue gas particles or scale are adsorbed on the inner and outer walls of the spiral pipe, it is easy to cause the heat exchange efficiency to be reduced, and the waste heat recovery efficiency is reduced. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a waste heat recovery system of a magnetic core sintering kiln, which solves the problem that most of the existing waste heat recovery equipment does not have the function of cleaning the inner and outer walls of the spiral pipe, after a large number of flue gas particles or scale are adsorbed on the inner and outer walls of the spiral pipe, it is easy to cause the heat exchange efficiency to be reduced, and the waste heat recovery efficiency is reduced.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the present application is realized by the following technical scheme: A waste heat recovery system of a magnetic core sintering kiln, comprising a sintering kiln body, a top of the sintering kiln body is provided with an exhaust fan, an input end of the exhaust fan is communicated with a smoke outlet of the sintering kiln body, an output end of the exhaust fan is communicated with a smoke exhaust pipe, one side of the sintering kiln body is fixedly connected with a heat exchange cylinder, the outer surface of the heat exchange cylinder is provided with a collecting cylinder near the top end, the end of the smoke exhaust pipe away from the exhaust fan is fixedly communicated with the top of the collecting cylinder, the inner wall of the heat exchange cylinder is provided with a filter plate and a gas collecting cylinder between the two sides from top to bottom, the filter plate is provided with an anti-blocking assembly for cleaning the filter plate, the bottom of the gas collecting cylinder and the bottom of the heat exchange cylinder are respectively provided with a connecting pipe and an exhaust pipe, the connecting pipe and the exhaust pipe are communicated with a spiral heat exchange pipe, the outer part of the spiral heat exchange pipe is provided with a first cleaning assembly for cleaning the outer surface of the spiral pipe, the inner part of the spiral heat exchange pipe is provided with a second cleaning assembly for cleaning the inner surface of the spiral heat exchange pipe, the outer surface of the heat exchange cylinder is provided with a driving mechanism for driving the first cleaning assembly and the second cleaning assembly to move, the collecting cylinder is provided with a collecting assembly, one side of the heat exchange cylinder is provided with a water inlet pipe and a water outlet pipe from top to bottom.

[0009] Preferably, the anti-blocking assembly comprises a rotating shaft, the rotating shaft is rotatably penetrated into the middle position of the top of the filter plate, the top end and the bottom end of the rotating shaft are respectively provided with an L-shaped cleaning rod and a driving impeller, the other end of the L-shaped cleaning rod is provided with a scraper.

[0010] Preferably, the first cleaning assembly comprises a first spiral pipe movably connected in the inner part of the spiral heat exchange pipe, the outer surface of the first spiral pipe is provided with a first cleaning brush for cleaning the inner wall of the spiral heat exchange pipe.

[0011] Preferably, the second cleaning assembly comprises a second spiral pipe movably connected on the outer surface of the spiral heat exchange pipe, the inner wall of the second spiral pipe is provided with a second cleaning brush for cleaning the outer surface of the spiral heat exchange pipe.

[0012] Preferably, the driving mechanism comprises two groups of annular sliding assemblies arranged on the outer surface of the heat exchange pipe, the annular sliding assembly comprises an annular sliding groove opened on the heat exchange pipe, a plurality of sliding blocks are slidably connected in the inner part of the annular sliding groove, a driving cylinder is fixedly connected between the sides of the plurality of sliding blocks away from the heat exchange pipe.

[0013] Preferably, the collecting assembly comprises a chip removal pipe fixedly communicated with the bottom of the collecting cylinder, the bottom end of the chip removal pipe is threadedly connected with a collecting tank.

[0014] Preferably, the first spiral pipe is made of magnetic material.

[0015] Preferably, the second spiral pipe is made of magnet material.

[0016] Preferably, the driving cylinder is made of magnet material.

[0017] (Three) beneficial effects

[0018] The application provides a waste heat recovery system of a magnetic core sintering kiln.

[0019] 1. When the spiral heat exchange pipe is used for a period of time, the inner wall and the outer wall of the spiral heat exchange pipe need to be cleaned, the staff manually rotates the driving cylinder, since the driving cylinder and the second spiral pipe are both made of magnet material, and the opposite poles of the opposite surfaces are opposite, the driving cylinder magnetically attracts the second spiral pipe, and the second spiral pipe magnetically attracts the first spiral pipe, so that the first spiral pipe can be driven to rotate and move inside the spiral heat exchange pipe when the driving cylinder rotates, and the second spiral pipe rotates and moves on the outer surface of the spiral heat exchange pipe, so that the first cleaning brush and the second cleaning brush rotatingly move to brush off the flue gas particles or scale on the inner wall and the outer wall of the spiral heat exchange pipe, avoiding that a large amount of flue gas particles or scale is adsorbed on the inner wall or the outer wall of the spiral heat exchange pipe to affect the heat exchange efficiency of the high-temperature flue gas, and effectively improving the waste heat recovery efficiency.

[0020] 2. The impurity particles in the high-temperature flue gas can be filtered and intercepted through the setting of the filter plate, greatly reducing the amount of flue gas particles entering the inside of the spiral heat exchange pipe, so that a large amount of flue gas particles in the spiral heat exchange pipe can be prevented from being adsorbed and accumulated, and the heat exchange efficiency can be improved.

[0021] 3. The driving impeller can be driven to rotate through the flow of gas in the gas collecting cylinder, and then the L-shaped cleaning rod can be driven to rotate through the shaft to stir the impurity particles filtered and intercepted on the top of the filter plate, and the impurity particles are thrown out into the collecting cylinder through the action of centrifugal force, so that the impurity particles accumulated on the top of the filter plate can be cleaned, the filter plate is prevented from being blocked, and the filtering efficiency of the filter plate is effectively improved.

[0022] 4. The scraper can be driven to rotate through the rotation of the L-shaped cleaning rod, and then the impurity particles collected on the inner wall of the collecting cylinder are scraped to the chip removal pipe through the scraper, and then are discharged to the collecting tank through the chip removal pipe for unified collection, so that the staff can conveniently clean them later. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure perspective view of the waste heat recovery system of the magnetic core sintering kiln.

[0024] Figure 2 It is a heat exchange cylinder and collecting cylinder internal structure schematic view of the waste heat recovery system of the magnetic core sintering kiln.

[0025] Figure 3 Structure diagram of annular sliding assembly and collection assembly of waste heat recovery system of magnetic core sintering kiln according to the present application;

[0026] Figure 4 Structure diagram of spiral heat exchange pipe and second spiral pipe of waste heat recovery system of magnetic core sintering kiln according to the present application;

[0027] Figure 5 Local section view diagram of spiral heat exchange pipe of waste heat recovery system of magnetic core sintering kiln according to the present application;

[0028] Figure 6 Section view diagram of first cleaning assembly and second cleaning assembly of waste heat recovery system of magnetic core sintering kiln according to the present application;

[0029] Figure 7 Section view diagram of heat exchange cylinder and collection cylinder of waste heat recovery system of magnetic core sintering kiln according to the present application;

[0030] Figure 8 Structure diagram of anti-blocking assembly of waste heat recovery system of magnetic core sintering kiln according to the present application.

[0031] Wherein, 1, sintering kiln body; 2, exhaust fan; 3, exhaust pipe; 4, heat exchange cylinder; 5, collection cylinder; 6, filter plate; 7, gas collection cylinder; 8, anti-blocking assembly; 81, rotating shaft; 82, L-shaped cleaning rod; 83, driving impeller; 84, scraper; 9, connecting pipe; 10, exhaust pipe; 11, spiral heat exchange pipe; 12, first cleaning assembly; 121, first spiral pipe; 122, first cleaning brush; 13, second cleaning assembly; 131, second spiral pipe; 132, second cleaning brush; 14, driving mechanism; 141, annular sliding assembly; 1411, annular sliding groove; 1412, sliding block; 142, driving cylinder; 15, collection assembly; 151, chip removal pipe; 152, collection tank; 16, water inlet pipe; 17, water outlet pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. EMBODIMENT

[0033] As Figures 1-8As shown, the embodiment of the present application provides a waste heat recovery system of a magnetic core sintering kiln, which comprises a sintering kiln body 1, an exhaust fan 2 is installed on the top of the sintering kiln body 1, the input end of the exhaust fan 2 is communicated with the smoke outlet of the sintering kiln body 1, the output end of the exhaust fan 2 is communicated with a smoke exhaust pipe 3, a heat exchange cylinder 4 is fixedly connected to one side of the sintering kiln body 1, a collecting cylinder 5 is arranged on the outer surface of the heat exchange cylinder 4 close to the top end, the end of the smoke exhaust pipe 3 away from the exhaust fan 2 is fixedly communicated with the top of the collecting cylinder 5, a filter plate 6 and a gas collecting cylinder 7 are arranged between the inner walls of the heat exchange cylinder 4 from top to bottom, a blocking prevention assembly 8 for cleaning the filter plate 6 is arranged on the filter plate 6, a connecting pipe 9 and an exhaust pipe 10 are arranged at the bottom of the gas collecting cylinder 7 and the heat exchange cylinder 4 respectively, a spiral heat exchange pipe 11 is communicated between the connecting pipe 9 and the exhaust pipe 10, a first cleaning assembly 12 for cleaning the outer surface of the spiral pipe is arranged on the outside of the spiral heat exchange pipe 11, a second cleaning assembly 13 for cleaning the inner surface of the spiral heat exchange pipe 11 is arranged in the inside of the spiral heat exchange pipe 11, a driving mechanism 14 for driving the first cleaning assembly 12 and the second cleaning assembly 13 to move is arranged on the outer surface of the heat exchange cylinder 4, a collecting assembly 15 is arranged on the collecting cylinder 5, a water inlet pipe 16 and a water outlet pipe 17 are arranged on one side of the heat exchange cylinder 4 from top to bottom, the impurity particles in the high-temperature flue gas can be filtered and intercepted through the arrangement of the filter plate 6, which greatly reduces the amount of flue gas particles entering the inside of the spiral heat exchange pipe 11, thereby preventing a large amount of flue gas particles from being absorbed and accumulated in the spiral heat exchange pipe 11, and the heat exchange efficiency can be improved.

[0034] The blocking prevention assembly 8 comprises a rotating shaft 81, the rotating shaft 81 is rotatably penetrated through the middle position of the top of the filter plate 6, L-shaped cleaning rods 82 and driving impellers 83 are arranged at the top end and the bottom end of the rotating shaft 81 respectively, a scraper 84 is arranged at the other end of the L-shaped cleaning rod 82, the driving impellers 83 can be rotated through the flow of gas in the gas collecting cylinder 7, thereby driving the L-shaped cleaning rod 82 to rotate through the rotating shaft 81 to stir the impurity particles filtered and intercepted on the top of the filter plate 6, and the impurity particles are thrown out into the collecting cylinder 5 through the action of centrifugal force, so that the impurity particles accumulated on the top of the filter plate 6 can be cleaned, and the filter plate 6 is prevented from being blocked, thereby effectively improving the filtering efficiency of the filter plate 6.

[0035] The first cleaning assembly 12 comprises a first spiral pipe 121 movably connected in the inside of the spiral heat exchange pipe 11, a first cleaning brush 122 for cleaning the inner wall of the spiral heat exchange pipe 11 is arranged on the outer surface of the first spiral pipe 121, and the first spiral pipe 121 is made of a magnetically conductive material.

[0036] The second cleaning assembly 13 comprises a second spiral pipe 131 movably connected to the outer surface of the spiral heat exchange pipe 11, and a second cleaning brush 132 is arranged on the inner wall of the second spiral pipe 131 and used for cleaning the outer surface of the spiral heat exchange pipe 11. The second spiral pipe 131 is made of a magnet material.

[0037] The driving mechanism 14 comprises two groups of annular sliding assemblies 141 arranged on the outer surface of the heat exchange pipe. Each annular sliding assembly 141 comprises an annular sliding groove 1411 formed in the heat exchange pipe, a plurality of sliding blocks 1412 movably connected to the inside of the annular sliding groove 1411, and a driving cylinder 142 fixedly connected to the sides of the plurality of sliding blocks 1412 away from the heat exchange pipe. The driving cylinder 142 is made of a magnet material. When the spiral heat exchange pipe 11 needs to be cleaned after being used for a period of time, the driving cylinder 142 is rotated. The driving cylinder 142 and the second spiral pipe 131 are both made of a magnet material, and the opposite faces have opposite magnetic poles. The driving cylinder 142 magnetically attracts the second spiral pipe 131, and the second spiral pipe 131 magnetically attracts the first spiral pipe 121. Thus, when the driving cylinder 142 rotates, the first spiral pipe 121 is driven to rotate and move in the inside of the spiral heat exchange pipe 11, and the second spiral pipe 131 is driven to rotate and move on the outer surface of the spiral heat exchange pipe 11. The first cleaning brush 122 and the second cleaning brush 132 that rotate and move can brush off the flue gas particles or scale on the inner wall and the outer wall of the spiral heat exchange pipe 11. In this way, the flue gas particles or scale adsorbed on the inner wall or the outer wall of the spiral heat exchange pipe 11 do not affect the heat exchange efficiency of the high-temperature flue gas, and the efficiency of waste heat recovery is effectively improved.

[0038] The collecting assembly 15 comprises a chip removal pipe 151 fixedly connected to the bottom of the collecting cylinder 5, and a collecting tank 152 threadedly connected to the bottom end of the chip removal pipe 151. The rotation of the L-shaped cleaning rod 82 drives the scraper 84 to rotate, and then the impurity particles collected on the inner bottom of the collecting cylinder 5 are scraped to the chip removal pipe 151 by the scraper 84, and then discharged to the collecting tank 152 for unified collection. When the sintering kiln body 1 stops working, the worker rotates the collecting tank 152 to release the threaded connection between the collecting tank 152 and the chip removal pipe 151, so that the collecting tank 152 can be removed from the chip removal pipe 151, and then the worker can clean the impurity particles collected in the collecting tank 152.

[0039] Working principle: when working, the worker first injects appropriate amount of water into the heat exchange cylinder 4 through the water inlet pipe 16, a large amount of high-temperature flue gas generated during the sintering process of the magnetic core is driven by the exhaust fan 2 installed at the exhaust port, transported to the collecting cylinder 5 through the exhaust pipe 3, and the impurity particles in the high-temperature flue gas are filtered and intercepted by the filter plate 6, and the high-temperature flue gas filtered by the filter plate 6 flows into the spiral heat exchange pipe 11 through the gas collecting cylinder 7 and the connecting pipe 9, and the heat in the high-temperature flue gas in the spiral heat exchange pipe 11 is absorbed by the water injected into the heat exchange cylinder 4, and the gas after heat recovery by water is discharged through the exhaust pipe 10;

[0040] When the high-temperature flue gas flows in the gas collecting cylinder 7, it can drive the driving impeller 83 to rotate, and then drive the L-shaped cleaning rod 82 to rotate through the rotating shaft 81, and the L-shaped cleaning rod 82 can drive the impurity particles filtered and intercepted on the top of the filter plate 6, and the impurity particles are thrown out into the collecting cylinder 5 by the centrifugal force, so that the filter plate 6 is prevented from being blocked, and the rotation of the L-shaped cleaning rod 82 can drive the scraper 84 to rotate, and then the impurity particles collected on the inner wall of the collecting cylinder 5 are scraped to the chip removal pipe 151, and then removed to the collecting tank 152 for unified collection, which is convenient for the worker to clean up later;

[0041] When the spiral heat exchange pipe 11 is used for a period of time, the inner wall and the outer wall of the spiral heat exchange pipe 11 need to be cleaned, the rotating drive cylinder 142 is rotated, the drive cylinder 142 and the second spiral pipe 131 are made of magnetic material, and the opposite poles of the opposite faces are opposite, the drive cylinder 142 magnetically attracts the second spiral pipe 131, and the second spiral pipe 131 magnetically attracts the first spiral pipe 121, so that the first spiral pipe 121 rotates and moves in the inside of the spiral heat exchange pipe 11 when the drive cylinder 142 rotates, and the second spiral pipe 131 rotates and moves on the outer surface of the spiral heat exchange pipe 11, so that the first cleaning brush 122 and the second cleaning brush 132 rotatingly move can brush off the flue gas particles or scale on the inner wall and the outer wall of the spiral heat exchange pipe 11.

[0042] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery system for a magnetic core sintering kiln, comprising a sintering kiln body (1), wherein an exhaust fan (2) is installed on the top of the sintering kiln body (1), the input end of the exhaust fan (2) is connected to the exhaust port of the sintering kiln body (1), and the output end of the exhaust fan (2) is connected to an exhaust pipe (3), characterized in that: A heat exchange cylinder (4) is fixedly connected to one side of the sintering kiln body (1). A collection cylinder (5) is provided on the outer surface of the heat exchange cylinder (4) near the top. The end of the exhaust pipe (3) away from the exhaust fan (2) is fixedly connected to the top of the collection cylinder (5). A filter plate (6) and a gas collecting cylinder (7) are arranged sequentially from top to bottom between the two sides of the inner wall of the heat exchange cylinder (4). An anti-clogging component (8) for cleaning the filter plate (6) is provided on the filter plate (6). A connecting pipe (9) is provided at the bottom of the gas collecting cylinder (7) and the bottom of the heat exchange cylinder (4). An exhaust pipe (10) is connected to a spiral heat exchange tube (11). A first cleaning component (12) for cleaning the outer surface of the spiral heat exchange tube (11) is provided on the outside of the spiral heat exchange tube (11). The first cleaning component (12) includes a first spiral tube (121) movably connected inside the spiral heat exchange tube (11). A first cleaning brush (122) for cleaning the inner wall of the spiral heat exchange tube (11) is provided on the outer surface of the first spiral tube (121). A first cleaning brush (122) for cleaning the inner wall of the spiral heat exchange tube (11) is provided inside the spiral heat exchange tube (11). A second cleaning assembly (13) for cleaning the inner surface of the heat exchange tube (11) includes a second spiral tube (131) movably connected to the outer surface of the spiral heat exchange tube (11). A second cleaning brush (132) for cleaning the outer surface of the spiral heat exchange tube (11) is provided on the inner wall of the second spiral tube (131). A driving mechanism (14) for moving the first cleaning assembly (12) and the second cleaning assembly (13) is provided on the outer surface of the heat exchange cylinder (4). A collection assembly (15) is provided on the collection cylinder (5). A water inlet pipe (16) and a water outlet pipe (17) are arranged sequentially from top to bottom on one side of the heat exchange tube (4); the driving mechanism (14) includes two sets of annular sliding components (141) arranged on the outer surface of the heat exchange tube. The annular sliding component (141) includes an annular groove (1411) opened on the heat exchange tube. Several sliders (1412) are slidably connected inside the annular groove (1411). A driving cylinder (142) is fixedly connected between the sides of the several sliders (1412) away from the heat exchange tube. The driving cylinder (142) is made of magnetic material.

2. The waste heat recovery system for a magnetic core sintering kiln according to claim 1, characterized in that: The anti-clogging component (8) includes a rotating shaft (81) that rotates through the middle of the top of the filter plate (6). The top and bottom ends of the rotating shaft (81) are respectively provided with an L-shaped cleaning rod (82) and a drive impeller (83). The other end of the L-shaped cleaning rod (82) is provided with a scraper (84).

3. The waste heat recovery system for a magnetic core sintering kiln according to claim 1, characterized in that: The collecting assembly (15) includes a chip removal pipe (151) fixedly connected to the bottom of the collecting cylinder (5), and the bottom end of the chip removal pipe (151) is threadedly connected to a collecting tank (152).

4. The waste heat recovery system for a magnetic core sintering kiln according to claim 1, characterized in that: The first spiral tube (121) is made of magnetically conductive material.

5. The waste heat recovery system for a magnetic core sintering kiln according to claim 1, characterized in that: The second spiral tube (131) is made of magnetic material.

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