Tail gas waste heat recycling device of silicon steel heat treatment furnace

Abstract

The invention 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 silicon steel heat treatment furnace tail gas waste heat recycling device comprises a tail gas passing pipe, and two F-shaped sliding frames are symmetrically and slidably installed on the outer sides of the side walls of the two ends of a long-strip-shaped impurity receiving box in a spring pushing mode; a U-shaped driving frame is welded between the head ends of the four transversely-arranged supporting rods on the two F-shaped sliding frames, two vertical side rods of the U-shaped driving frame are racks, and the racks are in meshing transmission with the gears on the corresponding sides; a bottom cover is fixedly plugged on a discharging opening in the bottom side of the long-strip-shaped impurity receiving box, and the two ends of the bottom cover protrude out of the long-strip-shaped impurity receiving box and abut against and make contact with the bottom ends of the two F-shaped sliding frames correspondingly; the two material guiding swing plates and the two inclined material guiding plates are oppositely and obliquely arranged in a staggered mode, and the two material guiding swing plates and the inclined material guiding plates form an air channel of a wavy structure in the long-strip-shaped impurity receiving box. The two material guiding swing plates can be used as blocking and intercepting parts for large-particle impurities and circulation and can also be used as sealing parts for the long-strip-shaped impurity receiving box, and the use effect that one device has two purposes is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat reuse devices for tail gas, and in particular to a waste heat reuse device for the tail gas of a silicon steel heat treatment furnace. Background Art

[0002] In a silicon steel production plant, the heat carried away by the exhaust gas emission of the heat treatment furnace is quite large. If all the exhausted heat is recovered and utilized, a considerable amount of standard coal can be saved every year, bringing millions of yuan of economic benefits to the enterprise. Therefore, it is very necessary to develop a waste heat reuse device for the tail gas of a silicon steel heat treatment furnace to recover and reuse the heat of the tail gas during the silicon steel production process.

[0003] Most of the existing waste heat reuse devices cannot directly remove large particulate impurities in the tail gas while absorbing and exchanging the waste heat of the tail gas, resulting in the subsequent need to set up an impurity cleaning device to intercept and filter the impurities additionally, which is not conducive to simplifying the waste gas treatment process and will indirectly increase the treatment cost of the tail gas. Summary of the Invention

[0004] In view of this, the present invention provides a waste heat reuse device for the tail gas of a silicon steel heat treatment furnace to solve the problem that most of the existing waste heat reuse devices cannot directly remove large particulate impurities in the tail gas while absorbing and exchanging the waste heat of the tail gas.

[0005] The technical solution proposed by the present invention is as follows: A waste heat reuse device for the tail gas of a silicon steel heat treatment furnace, specifically including a tail gas passing pipe, and a long strip-shaped impurity inlet groove is penetrated and opened at the middle position of the bottom of the circumferential side wall of the tail gas passing pipe; Two wind guiding spirals concentric with the tail gas passing pipe are fixedly arranged at intervals inside the tail gas passing pipe; a long strip-shaped impurity receiving box is welded to the bottom of the impurity inlet groove, and two inclined material guiding plates are welded at intervals up and down on the inner side of one long side wall of the long strip-shaped impurity receiving box, and two material guiding swing plates arranged at intervals up and down are rotatably installed on the inner side of the other long side wall of the long strip-shaped impurity receiving box. Two gears are symmetrically fixedly sleeved at both ends of the rotating shaft of the material guiding swing plate; two F-shaped sliding frames are symmetrically slidably installed on the outer sides of the two side walls of the long strip-shaped impurity receiving box in the form of spring pushing. A U-shaped driving frame is welded between the first ends of the four horizontal support rods on the two F-shaped sliding frames. The two vertical side rods of the U-shaped driving frame are racks, and the racks are in meshing transmission with the corresponding side gears; a bottom cover is fixedly sealed at the bottom discharge port of the long strip-shaped impurity receiving box, and both ends of the bottom cover protrude from the long strip-shaped impurity receiving box and are respectively in abutting contact with the bottom ends of the two F-shaped sliding frames; the two material guiding swing plates and the inclined material guiding plates are arranged in an inclined and staggered manner facing each other, and a wave-shaped air duct is formed inside the long strip-shaped impurity receiving box between the two.

[0006] Furthermore, both ends of the material guiding swing plate rotating shaft are correspondingly and rotatably fitted through the two long side walls of the strip-shaped impurity box. Four U-shaped positioning sleeves are symmetrically welded on the outer sides of the two long side walls at upper and lower intervals. The vertical side rod of the F-shaped slide is slidably fitted through the two U-shaped positioning sleeves on the corresponding side, and a U-shaped limiting frame is welded on the vertical side rod; Two shaft sleeves are symmetrically welded to the two U-shaped positioning sleeves located at the upper side among the four U-shaped positioning sleeves. The vertical limiting shafts of the two U-shaped limiting frames are slidably fitted through the two shaft sleeves correspondingly. The spring for pushing the F-shaped slide is sleeved on the vertical limiting shaft and is compressed and clamped between the shaft sleeve and the lower longitudinal connecting block of the U-shaped limiting frame.

[0007] Furthermore, six positioning ear blocks are symmetrically welded at the outer bottom of the strip-shaped impurity box. Six mounting ear blocks are symmetrically welded on the two long side edges of the bottom cover. Locking bolts are screwed through the mounting ear blocks in a threaded manner, and the top parts of the locking bolts are threadedly screwed through and connected to the positioning ear blocks at the corresponding positions.

[0008] Furthermore, a row of longitudinally arranged intercepting shafts with equal intervals are welded in the impurity inlet groove.

[0009] Furthermore, a U-shaped mounting frame is hoisted and welded on the inner circumference of the exhaust gas passage pipe. The air guiding spiral is sleeved on the cross bar support shaft of the U-shaped mounting frame, and a plurality of vertically and oppositely supported vertical connecting rods are welded between its inner circumference and the cross bar support shaft.

[0010] Furthermore, a circle of longitudinal heat exchange pipes is arranged in the outer peripheral space inside the exhaust gas passage pipe. Two annular liquid distribution pipes are symmetrically welded at both ends of the circle of longitudinal heat exchange pipes. Two vertical conduits are symmetrically welded at the tops of the two annular liquid distribution pipes. The two vertical conduits are welded through the circumferential side wall of the exhaust gas passage pipe. The circle of longitudinal heat exchange pipes is connected in series to an external heat exchange medium circulation system through the two vertical conduits.

[0011] Furthermore, two conical wind covers are symmetrically welded at the openings at both ends of the exhaust gas passage pipe. Two short connecting pipes are symmetrically welded at the openings on the opposite sides of the two conical wind covers; Two π-shaped support frames are symmetrically welded at both ends of the bottom of the exhaust gas passage pipe.

[0012] A silicon steel heat treatment furnace exhaust gas waste heat recycling device provided by the present invention has the following beneficial effects: 1. The airflow entering the tail gas through - pipe forms a swirling airflow under the sequential guidance of two guiding spiral vanes. When the swirling airflow rotates at high speed, a centrifugal force is generated. Under the action of this centrifugal force, large - particle impurities mixed in the tail gas are thrown towards the outer - ring space inside the tail gas through - pipe and rotate along the inner circumference of the tail gas through - pipe under the entrainment of the swirling airflow. When the large - particle impurities are entrained and rotated to the impurity inlet groove, the tail gas entraining them and their own bodies are thrown into the strip - shaped impurity - receiving box through the gaps between a row of vertically - arranged intercepting shafts, and then fall and are stored in the lower - layer space inside the strip - shaped impurity - receiving box along the wavy air duct. When the large - particle impurities are thrown into the strip - shaped impurity - receiving box, they can be removed from the tail gas, preliminarily treating the tail gas. This can save the trouble of setting up an impurity - cleaning device to remove large - particle impurities in the subsequent tail - gas treatment process, helping to simplify the tail - gas treatment process and indirectly reducing the tail - gas treatment cost.

[0013] 2. Due to the continuously curved characteristic of the air duct, it can form a blocking effect on the tail gas that follows the large - particle impurities and is thrown into the strip - shaped impurity - receiving box, preventing the thrown - in tail gas from flowing upwards in a reverse manner and generating a circulation inside the strip - shaped impurity - receiving box. This can prevent the large - particle impurities stored in the strip - shaped impurity - receiving box from being blown out of the strip - shaped impurity - receiving box and remixed into the swirling airflow inside the tail gas through - pipe under the action of this circulation, affecting the preliminary treatment effect of the tail gas.

[0014] 3. When the bottom cover is removed to discharge the large - particle impurities temporarily stored in the strip - shaped impurity - receiving box, the two F - shaped sliding frames lose the upward sliding holding force from the bottom cover and will automatically slide down under the reverse push of the springs compressed on the two U - shaped limiting frames and drive the two guiding swing plates to swing upwards until the head parts are in contact with the head of the inclined guiding plate. In this working condition, the two guiding swing plates and the inclined guiding plate are closed and butted together, closing the upper - layer space of the strip - shaped impurity - receiving box. Inevitably, when discharging the large - particle impurities temporarily stored in the strip - shaped impurity - receiving box, the upper - layer space of the strip - shaped impurity - receiving box remains open, causing a large amount of the tail gas inside the tail gas through - pipe to be discharged externally in sequence through the impurity inlet groove, the upper - open space of the strip - shaped impurity - receiving box, and the bottom opening of the strip - shaped impurity - receiving box under the centrifugal action of the swirling airflow, resulting in the direct external discharge of the tail gas without treatment, polluting the working environment inside the workshop and causing a large amount of waste heat in the tail gas to leak out.

[0015] 4. By using the power transmission of the two F - shaped sliding frames and the combined use of the reverse - push effect of the springs on the two U - shaped limiting frames, the up - and - down swing - switching action of the two guiding swing plates can be driven by the upward sliding top - thrust and downward driving force directly or indirectly acting on the two F - shaped sliding frames when the bottom cover is loosened and disassembled. This can save the trouble of manually switching the up - and - down swing postures of the two guiding swing plates before and after disassembling and assembling the bottom cover to discharge the large - particle impurities, and the operation is simple, convenient, and efficient.

[0016] V. The two material guiding swing plates can be used both as a blocking component for large-particle impurities and the circulating flow, and as a closing component for the strip-shaped impurity receiving box, achieving the effect of dual use of one device. This effect enables the waste heat reuse device to omit the closing component in the strip-shaped impurity receiving box, which helps to simplify the structure of the waste heat reuse device to a certain extent and reduce its cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0018] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0019] In the accompanying drawings: Figure 1 shows a schematic diagram of the overall structure of the present invention; Figure 2 shows a schematic diagram of the bottom-side perspective of the whole of the present invention; Figure 3 shows a schematic diagram of the half-section internal structure of the tail gas passing pipe in the present invention; Figure 4 shows a schematic diagram of the installation position of the air guiding spiral in the present invention; Figure 5 shows the Figure 4 magnified structure schematic diagram of part A in the present invention; Figure 6 shows a schematic diagram of the structure of the strip-shaped impurity receiving box in the present invention; Figure 7 shows the Figure 6 magnified structure schematic diagram of part B in the present invention; Figure 8 shows a schematic diagram of the internal structure of the strip-shaped impurity receiving box in the present invention; Figure 9 shows the Figure 8 magnified structure schematic diagram of part C in the present invention; Figure 10 shows a schematic diagram of the structure of the U-shaped driving frame in the present invention; Figure 11 shows a front view of the strip-shaped impurity receiving box and its internal structure in the present invention.

[0020] LIST OF REFERENCE NUMERALS: 1. Tail gas passing pipe; 101. Conical air hood; 1011. Short connection pipe; 102. π-shaped support frame; 103. U-shaped installation frame; 104. Impurity inlet groove; 105. Vertically arranged intercepting shaft; 2. Strip-shaped impurity collection box; 201. Bottom cover; 2011. Mounting ear block; 2012. Locking bolt; 202. F-shaped slide; 2021. U-shaped limit frame; 203. U-shaped positioning sleeve; 2031. Bush; 204. Guide material swing plate; 2041. Gear; 205. Inclined guide plate; 206. Positioning ear block; 207. Air duct; 3. Upright conduit; 4. U-shaped drive frame; 5. Vertical heat exchange pipe; 501. Annular liquid distribution pipe; 6. Air guide helix; 601. Upright connecting rod. Specific implementation manner

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] The following is an embodiment provided by the present invention. Please refer to Figures 1 to 11 : This embodiment provides a waste heat recycling device for the tail gas of a silicon steel heat treatment furnace, including a tail gas passing pipe 1. A long-strip structure of impurity inlet slot 104 is penetrated and opened at the middle position of the bottom of the circumferential side wall of the tail gas passing pipe 1; Two air guide helices 6 concentric with the tail gas passing pipe 1 are fixedly spaced inside the tail gas passing pipe 1; a strip-shaped impurity collection box 2 is welded to the bottom of the impurity inlet slot 104. Two inclined guide plates 205 are welded at intervals up and down on the inner side of a long side wall of the strip-shaped impurity collection box 2, and two guide material swing plates 204 are rotatably installed at intervals up and down on the inner side of the other long side wall of the strip-shaped impurity collection box 2. Two gears 2041 are symmetrically fixedly sleeved at both ends of the rotating shaft of the guide material swing plate 204; two F-shaped slides 202 are symmetrically slidably installed on the outer sides of the two short side walls of the strip-shaped impurity collection box 2 in the form of spring pushing. A U-shaped drive frame 4 is welded between the first ends of the four horizontal struts on the two F-shaped slides 202. The two vertical side rods of the U-shaped drive frame 4 are racks, and the racks are meshed and driven with the corresponding side gears 2041; a bottom cover 201 is fixedly sealed at the bottom discharge port of the strip-shaped impurity collection box 2. Both ends of the bottom cover 201 protrude from the strip-shaped impurity collection box 2 and are respectively in abutting contact with the bottom ends of the two F-shaped slides 202; the two guide material swing plates 204 and the inclined guide plates 205 are arranged in an inclined and staggered manner facing each other, and a wave-shaped air duct 207 is formed inside the strip-shaped impurity collection box 2 between the two.

[0023] Preferably, the two end portions of the rotating shaft of the material guide swing plate 204 correspond to the two long side walls of the long strip-shaped miscellaneous box 2 for rotational cooperation, and the outer sides of the two long side walls are symmetrically welded with four 咲-shaped positioning sleeves 203 arranged at upper and lower intervals, and the vertical side rods of the F-shaped slide 202 are slidably cooperated with the two 咲-shaped positioning sleeves 203 on the corresponding sides, and a 咲-shaped limit frame 2021 is welded on the vertical side rod; two of the four 咲-shaped positioning sleeves 203 located on the upper side are symmetrically welded with two shaft sleeves 2031, and the vertical limit shafts of the two 咲-shaped limit frames 2021 correspond to the two shaft sleeves 2031 for sliding cooperation, and the spring for pushing the F-shaped slide 202 is sleeved on the vertical limit shaft and is compressed and clamped between the shaft sleeve 2031 and the lower longitudinal connecting block of the 咲-shaped limit frame 2021.

[0024] Preferably, six positioning ear blocks 206 are symmetrically welded on the outer side of the bottom of the long strip-shaped miscellaneous box 2, and six mounting ear blocks 2011 are symmetrically welded on the two long sides of the bottom cover 201. The mounting ear blocks 2011 are threadedly screwed with locking bolts 2012, and the top portions of the locking bolts 2012 are threadedly screwed and connected with the positioning ear blocks 206 at the corresponding positions.

[0025] Preferably, a row of longitudinal interception shafts 105 arranged at equal intervals are welded in the impurity inlet groove 104 .

[0026] Preferably, a U-shaped mounting frame 103 is welded and hoisted on the inner circumference of the exhaust gas passage tube 1, and the air guide spiral 6 is mounted on the crossbar support shaft of the U-shaped mounting frame 103, and multiple vertical connecting rods 601 supporting each other upward and downward are welded and arranged between its inner circumference and the crossbar support shaft.

[0027] Preferably, a circle of longitudinal heat exchange tubes 5 is arranged in the peripheral space inside the exhaust gas passage tube 1, two annular liquid separation tubes 501 are symmetrically welded at both ends of the circle of longitudinal heat exchange tubes 5, two vertical conduits 3 are symmetrically welded at the tops of the two annular liquid separation tubes 501, the two vertical conduits 3 are penetrated and welded to the circumferential side wall of the exhaust gas passage tube 1, and the circle of longitudinal heat exchange tubes 5 is connected in series to an external heat exchange medium circulation system through the two vertical conduits 3.

[0028] Preferably, two conical wind hoods 101 are symmetrically welded on the openings at both ends of the exhaust gas passage tube 1, and two short pipes 1011 are symmetrically welded on the openings on the opposite sides of the two conical wind hoods 101, wherein one short pipe 1011 is connected to the exhaust gas output pipeline on the silicon steel heat treatment equipment, and is used to guide the exhaust gas output to the exhaust gas passage tube 1, and the other short pipe 1011 is connected to the device for treating the exhaust gas in the subsequent process, and is used to discharge the exhaust gas after heat recovery and utilization to the subsequent device for treating the exhaust gas; two π-shaped support frames 102 are symmetrically welded at the two ends of the bottom of the exhaust gas passage tube 1.

[0029] The following is a detailed description of the specific details, implementation steps, functions and interrelationships of the above features, as well as their roles in implementing this technical solution: The exhaust gas generated during the heat treatment of silicon steel is transported into the exhaust gas passage tube 1 by an external blower at a relatively high wind speed. The exhaust gas sequentially enters the exhaust gas passage tube 1 through the short pipe 1011 and the conical wind hood 101 on one side of the inlet end of the exhaust gas passage tube 1. The airflow entering the exhaust gas passage tube 1 forms a high-speed rotating airflow under the sequential 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 particles of impurities mixed in the exhaust gas are thrown into the outer ring space inside the exhaust gas passage tube 1, and rotate along the inner circumference of the exhaust gas passage tube 1 under the entrainment of the rotating airflow. When the large particles of impurities are entrained and rotated to the impurity inlet groove 104, the exhaust gas and its body entrained therein are thrown into the long strip impurity receiving box 2 through the gap between a row of longitudinal interception shafts 105, and are blown along the wavy air duct 207 to the long strip impurity receiving box 2. The large particles of impurities are dropped and stored in the lower space inside the impurity receiving box 2. When the large particles of impurities are thrown into the long strip impurity receiving box 2, they can be removed from the exhaust gas and the exhaust gas can be preliminarily treated. This can save the trouble of setting an impurity cleaning device in the subsequent exhaust gas treatment process to remove the large particles of impurities, which helps to simplify the exhaust gas treatment process and indirectly reduce the exhaust gas treatment cost; the air duct 207 can form a barrier effect on the exhaust gas thrown into the long strip impurity receiving box 2 with the large particles of impurities through its continuous bending characteristics, so as to prevent the thrown exhaust gas from flowing back upward and generating a circulation inside the long strip impurity receiving box 2, and prevent the large particles of impurities thrown into the long strip impurity receiving box 2 from being blown out of the long strip impurity receiving box 2 under the action of the circulation and re-mixed into the rotating airflow inside the exhaust gas passing through the pipe 1, affecting the preliminary treatment effect of the exhaust gas.

[0030] The bottom cover 201 is tightly blocked on the bottom opening of the long strip impurity receiving box 2 by six locking bolts 2012. The six locking bolts 2012 are rotated to unlock the bottom cover 201, and the bottom cover 201 is removed to open the bottom opening of the long strip impurity receiving box 2, so as to discharge the large particles of impurities temporarily stored in the long strip impurity receiving box 2.

[0031] 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 can be slid up and down to drive the two material guide swing plates 204 to swing up and down. The two F-shaped slides 202 are welded and fixed to the U-shaped driving frame 4, and the U-shaped driving frame 4 can be driven to slide up and down by the two F-shaped slides 202; because the bottom ends of the two F-shaped slides 202 are in contact with the protruding parts at both ends of the bottom cover 201, when the bottom cover 201 is locked and sealed on the bottom side opening of the long strip-shaped miscellaneous box 2, it can push and drive the two F-shaped slides 202 and the U-shaped driving frame 4 to slide up, and control the two material guide swing plates 204 to swing down to the position as shown in the figure. Figure 9 and Figure 11The inclined use posture for blocking large particle impurities and the circulating flow is as shown. When the two F-shaped sliding frames 202 are driven to slide upward, they drive the two U-shaped limiting frames 2021 to slide synchronously and compress the springs on the two U-shaped limiting frames 2021. When the bottom cover 201 is removed to discharge the large particle impurities temporarily stored in the long strip-shaped impurity receiving box 2, the two F-shaped sliding frames 202 lose the upward sliding holding force from the bottom cover 201, and will automatically slide downward under the reverse push of the above-compressed springs and drive the two material guiding swing plates 204 to swing upward until the first ends thereof abut against and contact 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 butted together to close the upper space of the long strip-shaped impurity receiving box 2, which can prevent the upper space of the long strip-shaped impurity receiving box 2 from remaining open when discharging the large particle impurities temporarily stored in the long strip-shaped impurity receiving box 2, resulting in a large amount of exhaust gas inside the exhaust gas through pipe 1 passing through the impurity inlet groove 104, the upper open space of the long strip-shaped impurity receiving box 2, and the bottom opening of the long strip-shaped impurity receiving box 2 in sequence under the centrifugal action of the rotating airflow and being discharged to the outside in large quantities, causing the exhaust gas to be directly discharged without treatment, polluting the working environment inside the workshop and causing a large amount of waste heat in the exhaust gas to leak and be lost externally.

[0032] Through the power transmission of the two F-shaped sliding frames 202 and in combination with the reverse push effect of the springs on the two U-shaped limiting frames 2021, the up-and-down swing switching action of the two material guiding swing plates 204 can be driven by the upward sliding top thrust and downward sliding driving force directly or indirectly acting on the two F-shaped sliding frames 202 when the bottom cover 201 is loosened and disassembled. This can save the trouble of manually switching the up-and-down swing posture of the two material guiding swing plates 204 additionally before and after disassembling the bottom cover 201 to discharge the large particle impurities, and the operation is simple, convenient and efficient.

[0033] The two material guiding swing plates 204 can be used both as components for blocking large particle impurities and the circulating flow and as components for closing the long strip-shaped impurity receiving box 2, having the use effect of one device with two functions. This effect can enable the waste heat recycling device to omit the setting of closing components in the long strip-shaped impurity receiving box 2, which helps to simplify the structure of the waste heat recycling device to a certain extent and reduce its cost.

[0034] Under the transportation of the rotating airflow, the exhaust gas entering the exhaust gas through pipe 1 is discharged through the short connecting pipe 1011 and the conical air hood 101 on one side of the outlet end of the exhaust gas through pipe 1 and is transported to the subsequent exhaust gas treatment process. During the process of flowing through the exhaust gas through pipe 1, the exhaust gas can heat the heat receiving medium circulating in the one-circle longitudinal heat exchange pipe 5 and the two annular liquid separation pipes 501 and transfer the waste heat contained therein to the heat dissipation medium. The external heat exchange medium circulation system is used to suck and circulate the heat dissipation medium and transfer the waste heat absorbed and recovered in the heat dissipation medium to the heat using equipment for utilization.

[0035] When discharging the large - particle impurities temporarily stored in the strip - shaped impurity mixing box 2, the U - shaped driving frame 4 can be slid up and down to drive the two material - guiding swing plates 204 to swing up and down, and control the two material - guiding swing plates 204 to impact and abut against the two inclined material - guiding plates 205, so as to conveniently and quickly vibrate and shake off the large - particle impurities accumulated on the two material - guiding swing plates 204 and the inclined material - guiding plates 205.

[0036] It should be noted that: to prevent the hand from being scalded when operating the U - shaped driving frame 4, the hand needs to be wearing gloves before operating the U - shaped driving frame 4; the distance between a row of longitudinally arranged intercepting shafts 105 is greater than the diameter of the large - particle impurities in the tail gas.

[0037] In this article, the following points need to be noted: 1. The attached drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the general design.

[0038] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0039] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A device for recycling waste heat of tail gas from a silicon steel heat treatment furnace, comprising a tail gas passage pipe (1), and an impurity inlet groove (104) with a strip structure is formed through the middle position at the bottom of the circumferential side wall of the tail gas passage pipe (1); It is characterized in that Two air guiding spirals (6) concentric with the tail gas passage pipe (1) are fixedly arranged at intervals inside the tail gas passage pipe (1); a strip-shaped impurity receiving box (2) is welded to the bottom of the impurity inlet groove (104). Two inclined material guiding plates (205) are welded at intervals up and down on the inner side of one long side wall of the strip-shaped impurity receiving box (2), and two material guiding swing plates (204) arranged at intervals up and down are rotatably installed on the inner side of the other long side wall thereof. Two gears (2041) are symmetrically fixedly sleeved at both ends of the rotating shaft of the material guiding swing plate (204); two F-shaped sliding frames (202) are symmetrically slidably installed on the outer sides of the two short side walls of the strip-shaped impurity receiving box (2) in the form of spring pushing. A U-shaped driving frame (4) is welded between the first ends of the four horizontal support rods on the two F-shaped sliding frames (202). The two vertical side rods of the U-shaped driving frame (4) are racks, and the racks are meshed with the corresponding gears (2041) for transmission; a bottom cover (201) is fixedly sealed at the bottom discharge port of the strip-shaped impurity receiving box (2). The two end parts of the bottom cover (201) protrude from the strip-shaped impurity receiving box (2) and are respectively in abutting contact with the bottom ends of the two F-shaped sliding frames (202); the two material guiding swing plates (204) and the inclined material guiding plates (205) are arranged in an inclined and staggered manner facing each other, and a wind channel (207) with a wavy structure is formed inside the strip-shaped impurity receiving box (2).

2. The waste heat recycling device for the tail gas of a silicon steel heat treatment furnace according to claim 1, characterized in that Both ends of the rotating shaft of the material guiding swing plate (204) are correspondingly rotatably matched with the two long side walls of the strip-shaped impurity receiving box (2) in a penetrating manner. Four U-shaped positioning sleeves (203) arranged at intervals up and down are symmetrically welded on the outer sides of the two long side walls. The vertical side rods of the F-shaped sliding frames (202) are slidably matched with the two U-shaped positioning sleeves (203) on the corresponding sides in a penetrating manner, and a U-shaped limiting frame (2021) is welded on the vertical side rods; Two bushings (2031) are symmetrically welded to the two upper U-shaped positioning sleeves (203) among the four U-shaped positioning sleeves (203). The vertical limiting shafts of the two U-shaped limiting frames (2021) are slidably matched with the two bushings (2031) in a penetrating manner. The springs for pushing the F-shaped sliding frames (202) are sleeved on the vertical limiting shafts and are compressed and clamped between the bushings (2031) and the lower longitudinal connecting blocks of the U-shaped limiting frames (2021).

3. The waste heat recovery device for the tail gas of a silicon steel heat treatment furnace according to claim 2, characterized in that, Six positioning ear blocks (206) are symmetrically welded at the outer side position of the bottom of the strip-shaped impurity receiving box (2). Six mounting ear blocks (2011) are symmetrically welded on the two long side edges of the bottom cover (201). Locking bolts (2012) are installed through the mounting ear blocks (2011) in a threaded manner. The top parts of the locking bolts (2012) are threadedly connected with the corresponding positioning ear blocks (206) in a penetrating manner.

4. A device for reheating and recycling waste heat from the tail gas of a silicon steel heat treatment furnace according to claim 1, characterized in that A row of longitudinally arranged intercepting shafts (105) arranged at equal intervals are welded in the impurity inlet groove (104).

5. A waste heat recycling device for the tail gas of a silicon steel heat treatment furnace according to claim 1, characterized in that, A U-shaped mounting frame (103) is welded and hoisted on the inner periphery of the exhaust gas passage pipe (1), the air guide spiral (6) is sleeved on the crossbar support shaft of the U-shaped mounting frame (103), and a plurality of vertical connecting rods (601) supporting each other upward and downward are welded and arranged between the inner periphery of the air guide spiral and the crossbar support shaft.

6. The waste heat recovery device for the tail gas of a silicon steel heat treatment furnace according to claim 1, characterized in that, A circle of longitudinal heat exchange pipes (5) is arranged in the peripheral space inside the exhaust gas passage tube (1), two annular liquid separation pipes (501) are symmetrically welded at both ends of the circle of longitudinal heat exchange pipes (5), and two vertical guide tubes (3) are symmetrically welded at the tops of the two annular liquid separation pipes (501).

7. A waste heat recycling device for the tail gas of a silicon steel heat treatment furnace according to claim 6, characterized in that, The two vertical conduits (3) are welded through the circumferential side wall of the exhaust gas passage tube (1), and a circle of longitudinal heat exchange tubes (5) are connected in series to an external heat exchange medium circulation system through the two vertical conduits (3).

8. A waste heat recycling device for 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 passage pipe (1), and two short pipes (1011) are symmetrically welded to the openings on opposite sides of the two conical wind shields (101); Two π-shaped support frames (102) are symmetrically welded at two ends of the bottom of the exhaust gas passage pipe (1).

Images