A silicon steel heat treatment furnace tail gas waste heat recycling device

Abstract

The application provides a silicon steel heat treatment furnace tail gas waste heat recycling device, and relates to the technical field of tail gas waste heat recycling. The device comprises a tail gas passing pipe, two F-shaped sliding frames are symmetrically and slidingly installed on the outer side of the sidewall of the two ends of the long strip-shaped impurity receiving box in the form of spring pushing, a N-shaped driving frame is welded between the first ends of four transversely arranged supporting rods on the two F-shaped sliding frames, the two vertical side rods of the N-shaped driving frame are racks, the racks are in meshing transmission with the corresponding gears, a bottom cover is fixedly blocked on the bottom side discharge port of the long strip-shaped impurity receiving box, the two ends of the bottom cover protrude from the long strip-shaped impurity receiving box and abut against the bottom ends of the two F-shaped sliding frames, the two material guiding swing plates and the inclined material guiding plates are oppositely and obliquely arranged in a staggered mode, and the two form a wave-shaped air duct in the interior of the long strip-shaped impurity receiving box. The two material guiding swing plates can be used as blocking and intercepting components for large particle impurities and circulation, and can also be used as closed components of the long strip-shaped impurity receiving box, and have a dual-purpose use effect.

Description

TECHNICAL FIELD

[0001] The present application relates to tail gas waste heat recycling device technical field, especially to a kind of silicon steel heat treatment furnace tail gas waste heat recycling device. BACKGROUND

[0002] The heat carried away by the exhaust emission of heat treatment furnace in silicon steel production plant is quite large, if all the exhausted heat is recycled and utilized, a considerable amount of standard coal can be saved every year, and hundreds of millions of economic benefits can be brought to the enterprise. Therefore, it is necessary to develop a silicon steel heat treatment furnace tail gas waste heat recycling device to recycle and utilize the heat of tail gas in the production process of silicon steel.

[0003] Most of the existing waste heat recycling devices cannot directly remove large particle impurities in the tail gas while absorbing and exchanging the tail gas waste heat, which requires additional impurity cleaning devices to trap, filter and remove impurities, which is not conducive to simplifying the waste gas treatment process and indirectly increases the treatment cost of tail gas. SUMMARY

[0004] Therefore, the present application provides a silicon steel heat treatment furnace tail gas waste heat recycling device to solve the problem that most of the existing waste heat recycling devices cannot directly remove large particle impurities in the tail gas while absorbing and exchanging the tail gas waste heat.

[0005] The technical solution of the present application is as follows: a silicon steel heat treatment furnace tail gas waste heat recycling device, specifically comprising a tail gas passing pipe, a long strip structure impurity inlet groove is formed in the middle of the bottom of the circumferential side wall of the tail gas passing pipe;

[0006] Two air guide spirals are fixed inside the tail gas passing pipe and concentrically arranged with the tail gas passing pipe; a long strip-shaped impurity receiving box is welded at the bottom of the impurity inlet groove, two inclined guide plates are welded on the inner side of one long side wall of the long strip-shaped impurity receiving box in an upper and lower interval, and two guide swing plates are rotatably installed on the inner side of the other long side wall of the long strip-shaped impurity receiving box in an upper and lower interval, and two gears are fixedly installed on both ends of the guide swing plate shaft; two F-shaped carriages are symmetrically installed on the outer sides of the two side walls of the long strip-shaped impurity receiving box in the form of spring pushing, and a N-shaped driving frame is welded between the first ends of the four horizontally arranged supporting rods on the two F-shaped carriages, the two vertical side rods of the N-shaped driving frame are racks, and the racks are in meshing transmission with the corresponding gears; a bottom cover is fixedly sealed on the bottom discharge port of the long strip-shaped impurity receiving box, the two ends of the bottom cover protrude from the long strip-shaped impurity receiving box and abut against the bottom ends of the two F-shaped carriages; the two guide swing plates and inclined guide plates are arranged in a reciprocating inclined staggered manner, and form a wave-shaped air duct in the long strip-shaped impurity receiving box.

[0007] Further, the two end portions of the guide material swing plate rotating shaft correspond to the two long side walls of the long strip-shaped impurity receiving box, and are penetratingly and rotatably connected, the outer sides of the two long side walls are symmetrically welded with four U-shaped positioning sleeves arranged in an upper and lower interval, the vertical side rod of the F-shaped slide frame is penetratingly and slidably connected with the two U-shaped positioning sleeves on the corresponding side, and the vertical side rod is welded with a U-shaped limiting frame;

[0008] The two U-shaped limiting frames are symmetrically welded with two shaft sleeves, and the vertical limiting shafts of the two U-shaped limiting frames are penetratingly and slidably connected with the two shaft sleeves.

[0009] Further, the bottom outer side of the long strip-shaped impurity receiving box is symmetrically welded with six positioning ear blocks, the two long side edges of the bottom cover are symmetrically welded with six mounting ear blocks, the mounting ear blocks are penetratingly and threadedly connected with locking bolts, and the top end portions of the locking bolts are threadedly and penetratingly connected with the positioning ear blocks at the corresponding positions.

[0010] Further, a row of longitudinally arranged intercepting shafts are welded in the impurity inlet groove.

[0011] Further, the U-shaped mounting frame is welded on the inner wall of the tail gas passing pipe, the air guide spiral is sleeved on the horizontal rod supporting shaft of the U-shaped mounting frame, and a plurality of vertical connecting rods are arranged between the inner wall of the tail gas passing pipe and the horizontal rod supporting shaft.

[0012] Further, a row of longitudinally arranged heat exchange pipes are arranged in the outer circumferential space of the tail gas passing pipe, two annular distribution pipes are symmetrically welded at the two ends of the row of longitudinally arranged heat exchange pipes, two vertical pipes are symmetrically welded at the top of the two annular distribution pipes, the two vertical pipes are penetratingly welded with the circumferential side wall of the tail gas passing pipe, and the row of longitudinally arranged heat exchange pipes are connected in series with the external heat exchange medium circulation system through the two vertical pipes.

[0013] Further, two conical windshields are symmetrically welded on the openings at the two ends of the tail gas passing pipe, and two short pipes are symmetrically welded on the openings on the opposite sides of the two conical windshields.

[0014] Two π-shaped support frames are symmetrically welded at the bottom of the tail gas passing pipe.

[0015] The silicon steel heat treatment furnace tail gas waste heat recycling device provided by the application has the following advantages:

[0016] I. The gas flow in the tail gas passing pipe forms a rotating gas flow under the guidance of two air guide spirals in sequence. When the rotating gas flow rotates at high speed, centrifugal force is generated. Under the action of the centrifugal force, large particle impurities mixed in the tail gas are thrown to the outer space of the tail gas passing pipe, and are wrapped and carried along the inner periphery of the tail gas passing pipe. When the large particle impurities are wrapped and rotated to the impurity inlet slot, the tail gas wrapped and the body thereof are thrown into the long strip-shaped impurity receiving box through the gap between the longitudinal blocking shafts, and fall into the lower space in the long strip-shaped impurity receiving box along the wavy air duct. The large particle impurities are removed from the tail gas, and the tail gas is preliminarily treated. This can avoid the need to set an impurity cleaning device in the subsequent tail gas treatment process to clean the large particle impurities, simplify the tail gas treatment process, and indirectly reduce the tail gas treatment cost.

[0017] II. The air duct has a continuous bending characteristic, which can form a blocking effect on the tail gas thrown into the long strip-shaped impurity receiving box along with the large particle impurities, avoid the thrown tail gas from flowing upward and generating a circulating flow in the long strip-shaped impurity receiving box, and prevent the large particle impurities stored in the long strip-shaped impurity receiving box from being blown out of the long strip-shaped impurity receiving box and mixed into the rotating gas flow in the tail gas passing pipe again under the action of the circulating flow, thereby affecting the preliminary treatment effect of the tail gas.

[0018] III. When the bottom cover is removed to discharge the large particle impurities temporarily stored in the long strip-shaped impurity receiving box, the two F-shaped slides lose the upward sliding retaining force from the bottom cover, are automatically pushed downward by the springs compressed in the two o-shaped limiting frames, and drive the two material guiding swing plates to swing upward to the working posture in which the first end portion of the two material guiding swing plates abuts against the first end of the inclined material guiding plate. In this working condition, the two material guiding swing plates and the inclined material guiding plate are closed and connected together, and the upper space of the long strip-shaped impurity receiving box is closed. Inevitably, when the large particle impurities temporarily stored in the long strip-shaped impurity receiving box are discharged, the upper space of the long strip-shaped impurity receiving box is kept open, the tail gas in the tail gas passing pipe is discharged in large quantities through the impurity inlet slot, the upper open space of the long strip-shaped impurity receiving box, and the bottom opening of the long strip-shaped impurity receiving box under the centrifugal action of the rotating gas flow, and the tail gas is directly discharged without treatment, which pollutes the working environment in the plant and causes a large amount of waste heat in the tail gas to be lost.

[0019] IV. The up-down swing switching action of the two material guiding swing plates is driven by the upward pushing force and downward driving force of the bottom cover directly or indirectly acting on the two F-shaped slides during the loosening and tightening of the bottom cover, which can avoid the need to manually switch the working posture of the two material guiding swing plates before and after the bottom cover is removed to discharge the large particle impurities, and the operation is simple and efficient.

[0020] Five, two places of material guide swing plate can be used as large particle impurities and the blocking interception components of circulating flow, and can be used as the closed components of long strip-shaped impurity box, has a dual-use effect, which can make the waste heat recycling device to remove the closed components in the long strip-shaped impurity box, help to simplify the structure of the waste heat recycling device and reduce its cost to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows.

[0022] The drawings described in the following merely relate to some embodiments of the present application, and are not a limitation to the present application.

[0023] In the drawings:

[0024] Figure 1 The overall structure schematic diagram of the present application is shown;

[0025] Figure 2 The overall bottom side view schematic diagram of the present application is shown;

[0026] Figure 3 The half-section internal structure schematic diagram of the tail gas through pipe in the present application is shown;

[0027] Figure 4 The installation position schematic diagram of the air guide spiral in the present application is shown;

[0028] Figure 5 The A part enlarged structure schematic diagram of the present application is shown; Figure 4

[0029] The structure schematic diagram of the long strip-shaped impurity box in the present application is shown; Figure 6

[0030] The B part enlarged structure schematic diagram of the present application is shown; Figure 7 Figure 6 The internal structure schematic diagram of the long strip-shaped impurity box in the present application is shown;

[0031] Figure 8 The C part enlarged structure schematic diagram of the present application is shown;

[0032] Figure 9 Figure 8 The structure schematic diagram of the U-shaped driving frame in the present application is shown;

[0033] Figure 10 The front view of the long strip-shaped impurity box and its internal structure in the present application is shown.

[0034] Figure 11 The front view of the long strip-shaped impurity box and its internal structure in the present application is shown.

[0035] ​​List of reference signs:

[0036] 1, tail gas through pipe; 101, conical wind cover; 1011, short connecting pipe; 102, π-shaped support frame; 103, U-shaped mounting frame; 104, impurity inlet groove; 105, vertically arranged intercepting shaft;

[0037] 2, long strip-shaped impurity receiving box; 201, bottom cover; 2011, mounting lug; 2012, locking bolt; 202, F-shaped sliding frame; 2021, U-shaped limiting frame; 203, U-shaped positioning sleeve; 2031, shaft sleeve; 204, material guiding swing plate; 2041, gear; 205, inclined material guiding plate; 206, positioning lug; 207, air duct;

[0038] 3, vertical guide pipe;

[0039] 4, U-shaped driving frame;

[0040] 5, vertically arranged heat exchange pipe; 501, annular distribution pipe;

[0041] 6, air guide spiral; 601, vertical connecting rod. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] The following is an embodiment provided by the present application, please refer to Figures 1 to 11 :

[0044] The present embodiment provides a silicon steel heat treatment furnace tail gas waste heat recycling device, which comprises a tail gas through pipe 1, and an impurity inlet groove 104 of long strip structure is formed in the middle position of the bottom of the circumferential side wall of the tail gas through pipe 1.

[0045] The tail gas passes through the tube 1 and is fixed with two wind guide spirals 6 arranged concentrically in the tube 1; the bottom of the impurity inlet groove 104 is welded with a long strip-shaped impurity receiving box 2, the inner side of one long side wall of the long strip-shaped impurity receiving box 2 is welded with two inclined guide plates 205 in an upper and lower interval, and the inner side of the other long side wall is rotatably installed with two guide swing plates 204 arranged in an upper and lower interval, and the two ends of the rotation shaft of the guide swing plate 204 are symmetrically fixed with two gears 2041.

[0046] Preferably, the two ends of the rotation shaft of the guide swing plate 204 are rotatably matched with the two long side walls of the long strip-shaped impurity receiving box 2, the outer sides of the two long side walls are symmetrically welded with four N-shaped positioning sleeves 203 arranged in an upper and lower interval, the vertical side rods of the F-shaped sliding frame 202 are slidably matched with the two N-shaped positioning sleeves 203 on the corresponding side, and the N-shaped limiting frame 2021 is welded on the vertical side rod.

[0047] Preferably, the bottom outer side of the long strip-shaped impurity receiving box 2 is symmetrically welded with six positioning ear blocks 206, the two long sides of the bottom cover 201 are symmetrically welded with six mounting ear blocks 2011, the locking bolts 2012 are installed on the mounting ear blocks 2011 in a threaded screwing manner, and the top ends of the locking bolts 2012 are threadedly screwed and connected with the positioning ear blocks 206 at the corresponding positions.

[0048] Preferably, a row of equally spaced longitudinal intercepting shafts 105 are welded in the impurity inlet groove 104.

[0049] Preferably, the N-shaped mounting frame 103 is hung and welded on the inner wall of the tail gas passing pipe 1, the wind guide spiral 6 is sleeved on the horizontal rod support shaft of the N-shaped mounting frame 103, and a plurality of vertical connecting rods 601 arranged in an upper and lower direction are welded between the inner wall of the wind guide spiral 6 and the horizontal rod support shaft.

[0050] Preferably, the tail gas passes through the outer circumferential space of the tail gas passing pipe 1, and a circle of longitudinal heat exchange pipes 5 is arranged in the outer circumferential space. Two annular distribution pipes 501 are symmetrically welded at the two ends of the circle of longitudinal heat exchange pipes 5. Two vertical guide pipes 3 are symmetrically welded at the top of the two annular distribution pipes 501. The two vertical guide pipes 3 are through-welded with the circumferential side wall of the tail gas passing pipe 1. The circle of longitudinal heat exchange pipes 5 is connected in series in the external heat exchange medium circulating system through the two vertical guide pipes 3.

[0051] Preferably, two conical windshields 101 are symmetrically welded at the openings of the two ends of the tail gas passing pipe 1. Two short pipes 1011 are symmetrically welded at the openings of the opposite sides of the two conical windshields 101. One of the two short pipes 1011 is connected with the output pipe of the tail gas of the silicon steel heat treatment equipment, and is used for guiding the tail gas into the tail gas passing pipe 1. The other short pipe 1011 is connected with the device for treating the tail gas in the subsequent process, and is used for discharging the tail gas after heat recovery into the device for treating the tail gas in the subsequent process. Two π-shaped support frames 102 are symmetrically welded at the bottom of the tail gas passing pipe 1.

[0052] The specific details, implementation steps, functions and mutual relationships of the features, and the roles played in the process of realizing the technical solution are described and explained in detail as follows:

[0053] The tail gas generated during the heat treatment of silicon steel is delivered into the tail gas passing pipe 1 by an external air blower at a high air speed. The tail gas enters the tail gas passing pipe 1 through the short connecting pipe 1011 on the side of the inlet end of the tail gas passing pipe 1 and the conical air hood 101. The airflow entering the tail gas passing pipe 1 forms a high-speed rotating airflow under the guidance of the two air guide spirals 6. When the rotating airflow rotates at a high speed, centrifugal force is generated. Under the action of the centrifugal force, large-particle impurities mixed in the tail gas are thrown to the outer space inside the tail gas passing pipe 1 and rotate along the inner periphery of the tail gas passing pipe 1 under the entrainment of the rotating airflow. When the large-particle impurities are entrained and rotated to the impurity inlet groove 104, the tail gas and the large-particle impurities are thrown into the long-strip-shaped impurity collecting box 2 through the gaps between the longitudinal blocking shafts 105 and fall into the lower space inside the long-strip-shaped impurity collecting box 2 along the wavy air duct 207. The large-particle impurities are stored in the long-strip-shaped impurity collecting box 2 and are removed from the tail gas. The tail gas is preliminarily treated. This can avoid the need to set an impurity cleaning device in the subsequent tail gas treatment process to clean the large-particle impurities, simplify the tail gas treatment process, and indirectly reduce the tail gas treatment cost. The wavy air duct 207 can form a blocking effect on the tail gas thrown into the long-strip-shaped impurity collecting box 2, avoid the upward backflow of the tail gas thrown into the long-strip-shaped impurity collecting box 2 and the generation of a circulating flow in the long-strip-shaped impurity collecting box 2, prevent the large-particle impurities stored in the long-strip-shaped impurity collecting box 2 from being blown out of the long-strip-shaped impurity collecting box 2 and mixed into the rotating airflow in the tail gas passing pipe 1 again under the action of the circulating flow, and affect the preliminary treatment effect of the tail gas.

[0054] The bottom cover 201 is tightly capped on the bottom side opening of the long-strip-shaped impurity collecting box 2 by six locking bolts 2012. The bottom cover 201 can be loosened and removed by rotating and unlocking the six locking bolts 2012, so that the bottom side opening of the long-strip-shaped impurity collecting box 2 is opened, and the large-particle impurities collected and temporarily stored in the long-strip-shaped impurity collecting box 2 are unloaded.

[0055] The upper and lower sliding of the U-shaped driving frame 4 can drive the up and down swinging of the two material guiding swing plates 204 through the meshing transmission of the two racks on the U-shaped driving frame 4 and the four gears 2041. The U-shaped driving frame 4 is slidably driven by the two F-shaped carriages 202. Since the bottom ends of the two F-shaped carriages 202 abut against the protruding parts at the two ends of the bottom cover 201, the U-shaped driving frame 4 and the two F-shaped carriages 202 can be pushed and driven to slide upward when the bottom cover 201 is tightly capped on the bottom side opening of the long-strip-shaped impurity collecting box 2, and the two material guiding swing plates 204 are controlled to swing downward to the position shown in FIG. 6. Figure 9 and Figure 11The illustrated inclined use posture of the barrier interception of large-particle impurities and circular flow, the two F-shaped carriages 202 are driven to slide upwards, driving the two o-shaped limit frames 2021 to slide synchronously and compress the springs above the two o-shaped limit frames 2021, when the bottom cover 201 is removed to discharge the large-particle impurities temporarily stored in the long strip-shaped impurity box 2, the two F-shaped carriages 202 lose the upward sliding retaining force from the bottom cover 201, and automatically slide downwards under the counter-push of the compressed springs above, driving the two material guiding swing plates 204 to swing upwards to the use posture in which the first end portion abuts against the first end of the inclined material guiding plate 205, in this working condition, the two material guiding swing plates 204 and the inclined material guiding plate 205 are closed and connected together, sealing the upper space of the long strip-shaped impurity box 2, which can avoid the upper space of the long strip-shaped impurity box 2 remaining open when discharging the large-particle impurities temporarily stored in the long strip-shaped impurity box 2, causing the exhaust gas in the pipe 1 to be discharged in large quantities under the centrifugal action of the rotating gas flow through the impurity inlet groove 104, the upper open space of the long strip-shaped impurity box 2, and the bottom opening of the long strip-shaped impurity box 2, resulting in the exhaust gas being directly discharged without treatment, polluting the working environment inside the plant and causing a large amount of waste heat in the exhaust gas to be lost.

[0056] The up-down swinging switching action of the two material guiding swing plates 204 can be driven by the upward sliding thrust and downward driving force of the bottom cover 201 acting directly or indirectly on the two F-shaped carriages 202 when the bottom cover 201 is loosened and removed, which can avoid the need for manually switching the use posture of the two material guiding swing plates 204 before and after discharging the large-particle impurities, making the operation simple and efficient.

[0057] The two material guiding swing plates 204 can be used as barrier interception components for large-particle impurities and circular flow, and as sealing components for the long strip-shaped impurity box 2, having a dual-purpose effect, which can simplify the structure of the waste heat recycling device to some extent and reduce its cost.

[0058] Under the transportation of the rotating gas flow, the exhaust gas entering the exhaust gas passing pipe 1 is discharged through the short connecting pipe 1011 on one side of the outlet end of the exhaust gas passing pipe 1 and the conical wind cover 101, and is transported to the subsequent exhaust gas treatment process, and in the process of flowing through the exhaust gas passing pipe 1, the exhaust gas can heat the heat medium circulating in the vertical heat exchange pipe 5 and the two annular distribution pipes 501, and transfer the heat contained in the heat medium to the heat medium, and the external heat exchange medium circulation system is used to suck and circulate the heat medium and transfer the heat recovered in the heat medium to the heat utilization equipment for utilization.

[0059] When the large-particle impurities temporarily stored in the long strip-shaped impurity box 2 are discharged, the two sets of guide swing plates 204 can be driven to swing up and down by sliding the concave driving frame 4 up and down, and the two sets of guide swing plates 204 are controlled to impact and abut against the two sets of inclined guide plates 205, so that the large-particle impurities accumulated on the two sets of guide swing plates 204 and the inclined guide plates 205 can be conveniently and quickly vibrated and shaken off for cleaning.

[0060] It is worth noting that: in order to prevent the hands from being scalded when operating the concave driving frame 4, gloves need to be worn before operating the concave driving frame 4; the spacing between the one-row longitudinal intercepting shafts 105 is greater than the diameter of the large-particle impurities in the tail gas.

[0061] In this paper, the following points need attention:

[0062] 1. The drawings of the embodiments of the present application only involve the structures involved in the embodiments of the present application, and other structures can refer to the usual design.

[0063] 2. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0064] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for reusing waste heat from tail gas of a silicon steel heat treatment furnace, comprising a tail gas passage pipe (1), wherein an impurity inlet groove (104) of a long strip structure is provided through the bottom middle position of the circumferential side wall of the tail gas passage pipe (1). Its features are, The exhaust gas passage pipe (1) has two air guide spirals (6) fixed at intervals inside, concentrically arranged with the exhaust gas passage pipe (1); the bottom of the impurity inlet trough (104) is welded with a long strip-shaped impurity receiving box (2), and two inclined guide plates (205) are welded vertically at intervals on the inner side of one long side wall of the long strip-shaped impurity receiving box (2), and two guide swing plates (204) are rotatably installed vertically at intervals on the inner side of the other long side wall, and two gears (2041) are symmetrically fixed at both ends of the rotating shaft of the guide swing plate (204); the two short side walls of the long strip-shaped impurity receiving box (2) are symmetrically slidably installed with F-shaped slides (202) in the form of spring push, and the two A U-shaped drive frame (4) is welded between the ends of four horizontally placed support rods on the F-shaped slide (202). The two vertical side rods of the U-shaped drive frame (4) are racks, which mesh with the gears (2041) on the corresponding sides for transmission. A bottom cover (201) is fixedly sealed on the bottom discharge port of the long strip-shaped receiving box (2). The two ends of the bottom cover (201) protrude from the long strip-shaped receiving box (2) and abut against the bottom ends of the two F-shaped slides (202) respectively. The two guide plates (204) and the inclined guide plates (205) are arranged in opposite directions and interleaved, and the two form a wave-shaped air duct (207) inside the long strip-shaped receiving box (2).

2. The device for reusing waste heat from the tail gas of a silicon steel heat treatment furnace according to claim 1, characterized in that, The two ends of the rotating shaft of the guide plate (204) are connected to the two long side walls of the long strip-shaped collection box (2) through rotation. Four U-shaped positioning sleeves (203) are symmetrically welded on the outer side of the two long side walls and are arranged at vertical intervals. The vertical side rod of the F-shaped slide (202) is connected to the two U-shaped positioning sleeves (203) on the corresponding side through sliding. A U-shaped limiting frame (2021) is welded on the vertical side rod. Two bushings (2031) are symmetrically welded to the upper two of the four U-shaped positioning sleeves (203). The vertical limiting shafts of the two U-shaped limiting frames (2021) slide through and engage with the two bushings (2031). The spring that pushes the F-shaped slide (202) is fitted on the vertical limiting shaft and compressed and clamped between the bushing (2031) and the lower longitudinal connecting block of the U-shaped limiting frame (2021).

3. The waste heat recovery device for silicon steel heat treatment furnace tail gas according to claim 2, characterized in that, The bottom outer side of the elongated receiving box (2) is symmetrically welded with six positioning lugs (206), and the two long sides of the bottom cover (201) are symmetrically welded with six mounting lugs (2011). Locking bolts (2012) are threaded through the mounting lugs (2011), and the top part of the locking bolts (2012) is threaded through and connected to the corresponding positioning lugs (206).

4. The waste heat recovery device for silicon steel heat treatment furnace tail gas according to claim 1, characterized in that, A row of equally spaced longitudinal intercepting shafts (105) are welded into the impurity inlet groove (104).

5. The waste heat recovery device for silicon steel heat treatment furnace tail gas according to claim 1, characterized in that, The exhaust gas is suspended by a U-shaped mounting frame (103) welded to the inner circumference of the pipe (1). The air guide spiral (6) is fitted onto the horizontal support shaft of the U-shaped mounting frame (103), and there are multiple vertical connecting rods (601) welded between its inner circumference and the horizontal support shaft, which support each other from top to bottom.

6. The waste heat recovery device for silicon steel heat treatment furnace tail gas according to claim 1, characterized in that, The exhaust gas passes through the outer periphery of the pipe (1) where a longitudinal heat exchanger (5) is installed. Two annular liquid distribution pipes (501) are symmetrically welded to both ends of the longitudinal heat exchanger (5). Two vertical conduits (3) are symmetrically welded to the top of the two annular liquid distribution pipes (501).

7. The waste heat recovery device for silicon steel heat treatment furnace tail gas according to claim 6, characterized in that, The two vertical ducts (3) are welded through the circumferential sidewall of the exhaust gas through pipe (1), and a ring of longitudinal heat exchange pipes (5) is connected in series to the external heat exchange medium circulation system through the two vertical ducts (3).

8. The device for reusing waste heat from the tail gas of a silicon steel heat treatment furnace according to claim 1, characterized in that, Two conical wind shields (101) are symmetrically welded to the openings at both ends of the exhaust gas through pipe (1), and two short pipes (1011) are symmetrically welded to the openings on opposite sides of the two conical wind shields (101). The exhaust gas passage pipe (1) has two π-shaped support frames (102) symmetrically welded at both ends of its bottom.

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