Waste gas waste heat recovery treatment device for smelting and sintering industry

Abstract

The utility model discloses a smelting and sintering industry waste gas waste heat recovery processing device which comprises a processing box, a filtering mechanism and a heat exchange mechanism are arranged in the processing box, and the heat exchange mechanism is arranged on one side of the filtering mechanism. An air inlet pipe and an air outlet pipe are arranged at two ends of the treatment box; a slot is formed in the top of the treatment box, through grooves are formed in two side walls of the treatment box, and a guide rail is arranged on the inner wall of the treatment box; the filtering mechanism comprises a pair of filtering layers, a pair of inserting blocks, a pair of first electric push rods, a pair of limiting blocks and a pair of second electric push rods, wherein the filtering layers are composed of filtering frames and filtering nets; a movable hole and a first insertion hole are formed in the top of the filtering frame, and a second insertion hole is formed in the bottom of the filtering frame. According to the waste heat recovery device, the filter layers can be alternately replaced, so that the waste heat recovery process is continuously carried out, and the working efficiency is ensured; and secondly, the residual quantity of dust in the treatment box can be reduced in a manner of directly taking out the filter layer for replacement and then cleaning.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery, and in particular relates to a waste heat recovery and treatment device for smelting and sintering industrial waste gas. Background Art

[0002] Smelting and sintering in the industry is a key step in the steel production process. It is mainly used to convert the packaged iron ore into sintered ore suitable for blast furnace smelting. Blast furnace smelting produces a large amount of high-heat exhaust gas and is discharged. If it is not recycled, it will be directly wasted.

[0003] After searching, the prior art publication number CN 217844846 U discloses an industrial waste gas waste heat recovery and heat exchange device. The device includes a waste gas treatment unit that filters waste gas to prevent dust in the waste gas from adhering to the heat exchange fins and affecting the heat exchange effect. The device also back-blows the filter to remove dust filtered from the filter, preventing clogging and affecting the waste heat recovery efficiency. The filter can also be easily removed to clean dust inside the filter and housing, making it easy to use.

[0004] At the same time, this solution has corresponding disadvantages. First, the waste heat recovery process will be interrupted when the filter is replaced. Second, there is a contradiction between back-blowing the filter and replacing the filter. Back-blowing the filter will cause a large amount of dust to be dispersed in the shell, which not only needs to be processed again, but also will still adhere to the heat exchange plate. Third, when replacing the filter, the filter can be directly removed and then the dust can be cleaned, which can avoid dust from being left in the shell. Therefore, there is no need to back-blown the filter in the shell, so there is a contradiction.

[0005] Therefore, based on the above-mentioned drawbacks and the prior art, the applicant provides a waste heat recovery device. Summary of the Invention

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a waste heat recovery and treatment device for smelting and sintering industrial waste gas, which can alternately replace the filter layer to ensure that the waste heat recovery process is carried out continuously and uninterruptedly, thereby ensuring work efficiency; secondly, the method of directly taking out the filter layer, replacing it and then cleaning it can also reduce the amount of residual dust in the treatment box.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A device for recovering and treating waste heat from waste gas in smelting and sintering industries comprises a treatment box, wherein a filtering mechanism and a heat exchange mechanism are provided inside the treatment box, and the heat exchange mechanism is arranged on one side of the filtering mechanism; an air inlet pipe and an air outlet pipe are provided at both ends of the treatment box; a slot is provided on the top of the treatment box, through grooves are provided on both side walls of the treatment box, and guide rails are provided on the inner wall of the treatment box.

[0009] The filtering mechanism includes a pair of filtering layers composed of a filter frame and a filter mesh, a pair of plug blocks, a pair of first electric push rods, a pair of limit blocks, and a pair of second electric push rods; the filter frame is inserted into the processing box along the slot and plugged into the guide rail, the top of the filter frame is provided with a movable hole and a first plug hole, the bottom of the filter frame is provided with a second plug hole, and both sides of the filter frame are provided with adjustment shafts that are plugged into each other and can slide, and the two ends of the adjustment shafts are respectively provided in the movable hole and the second plug hole.

[0010] The two ends of the plug block are provided with wedge-shaped surfaces and plug plates. One side of the plug block is provided with a fixed connecting plate. The connecting plate is provided with a fixed connecting column, and the connecting column is set as a T-shaped column.

[0011] The first electric push rod is fixed on the side wall of the processing box. A top plate is provided on the top shaft of the first electric push rod. The top plate is provided with T-shaped slots for installing connecting columns and fitting with each other.

[0012] The limit block is arranged in the processing box, the limit block is located between the filter frames, a fixed arm is provided on the limit block, the fixed arm passes through the through slot, the second electric push rod is fixed on the side wall of the processing box, and the top shaft of the second electric push rod is fixedly connected to the fixed arm.

[0013] The heat exchange mechanism includes a coil for passing water and a plurality of blades arranged on the coil for absorbing heat; the coil passes water and absorbs heat to recover heat for reuse.

[0014] One end of the processing box is provided with a cleaning port that can be opened and closed for cleaning residual dust in the processing box.

[0015] Preferably, a first top plate is provided at one end of the adjusting shaft and is located in the movable hole, so that the insert block can be completely pushed out of the movable hole.

[0016] Preferably, both ends of the top plate are provided with guide columns that are fixedly connected and can be extended and retracted, one end of the guide column is fixedly connected to a fixed plate, and the fixed plate is fixed on the side wall of the processing box; the guide column can provide stable support for the rise of the top plate.

[0017] Preferably, a sealing plate is provided on the fixed arm for sealing the through slot to prevent air leakage, and the length of the sealing plate is not less than three times the length of the through slot to ensure that the through slot can be closed when the limit block moves.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) Smelting and sintering industrial waste gas enters the treatment box through the air intake pipe, and then enters the heat exchange mechanism for heat exchange after being filtered by the filter mechanism to realize waste heat recovery and reuse; when the filter screen is covered with dust and needs to be replaced, the filter layers in the filter mechanism can be replaced and removed alternately to avoid clogging of the filter screen and reduce the waste gas passing rate; Among them, the use of alternating replacement can ensure that there is always a pair of filter layers in the filtering work and it is continuous during the replacement process, which can ensure the continuous filtration of waste gas and waste heat recovery, and ensure work efficiency. The method of removing the filter layer for replacement can also reduce the amount of dust residue in the treatment box;

[0020] 2) The working state of the filter mechanism when the filter layers are replaced alternately is that one of the filter layers is in filtering operation and the other guide rail is in an empty state; first, the first electric push rod is pushed out, and then the plug block and the plug plate are plugged into the movable hole and the first socket on the filter rack to hang and support the filter rack, and then the second electric push rod is used to pull one end of the limit block to slide under the empty guide rail, and then the top shaft of the first electric push rod is retracted and reset to insert the filter rack along the slot into the processing box and the empty guide rail, and the filter rack continues to slide down so that the second socket is gradually close to the limit block, thereby making the adjustment The joint shaft gradually pushes the limit block, thereby causing the adjusting shaft to rise and push the wedge-shaped surface of the plug block through the first top plate, and finally pushes the plug block out of the movable hole and the first socket on the filter rack. Furthermore, the other end of the plug block is plugged into the movable hole and the first socket of the filter rack to be replaced. At this time, the connecting column on the plug block slides in the T-slot on the top plate; finally, the first electric push rod pushes the top plate, and the plug block drives the filter rack to be replaced with the filter layer to rise and be guided out of the processing box. Then, the filter rack is removed from the plug block and a clean filter layer is hung for timely replacement.

[0021] It is worth noting that the moving direction of the limit block is opposite to the sliding direction of the plug block. Only by moving the limit block, the sliding of the adjustment shaft can be controlled by the limit block, and the sliding of the adjustment shaft controls the sliding of the plug block. The sliding of the plug block not only releases the plug-in state of the clean filter layer, but also simultaneously completes the plug-in locking state for the filter layer that needs to be replaced. This structure is simple and convenient to use, and can quickly realize the replacement and installation of the filter layer. By filtering the exhaust gas, the dust adhesion rate on the blades can be reduced, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attachment Figure 1 This is a schematic diagram of the structure of a waste heat recovery and treatment device for smelting and sintering industrial waste gas;

[0023] Attachment Figure 2 It is a schematic diagram of the internal structure of the processing box;

[0024] Attachment Figure 3 It is a schematic diagram of the structure of the outer wall of the processing box;

[0025] Attachment Figure 4 It is a structural diagram of the filter frame and filter screen;

[0026] Attachment Figure 5 This is a schematic diagram of the filter layer's usage effect structure. Figure 1 ;

[0027] Attachment Figure 6 This is a schematic diagram of the filter layer's usage effect structure. Figure 2 ;

[0028] Attachment Figure 7 This is a schematic diagram of the use effect between the insert block, limit block, and adjustment shaft;

[0029] In the figure: 1. processing box; 11. slot; 12. through slot; 13. air inlet pipe; 14. air outlet pipe; 15. guide rail; 2. filter mechanism; 21. filter frame; 211. filter screen; 212. movable hole; 213. first plug hole; 214. second plug hole; 22. adjusting shaft; 221. first top plate; 23. plug block; 231. connecting plate; 232. connecting column; 233. plug plate; 234. wedge surface; 25. first electric push rod; 251. top plate; 2511. T-slot; 252. guide column; 26. limit block; 261. fixed arm; 262. sealing plate; 27. second electric push rod; 28. fixed plate; 3. heat exchange mechanism; 31. coil; 32. blade; 4. cleaning port. DETAILED DESCRIPTION

[0030] To facilitate understanding by those skilled in the art, Figure 1-7 , the technical solution of the utility model is further described in detail.

[0031] A device for recovering and treating waste heat from waste gas in smelting and sintering industries comprises a treatment box 1, in which a filtering mechanism 2 and a heat exchange mechanism 3 are provided, and the heat exchange mechanism 3 is arranged on one side of the filtering mechanism 2; an air inlet pipe 13 and an air outlet pipe 14 are provided at both ends of the treatment box 1; a slot 11 is provided at the top of the treatment box 1, through grooves 12 are provided on both side walls of the treatment box 1, and a guide rail 15 is provided on the inner wall of the treatment box 1.

[0032] The filtering mechanism 2 includes a pair of filtering layers composed of a filter frame 21 and a filter mesh 211, a pair of plug blocks 23, a pair of first electric push rods 25, a pair of limit blocks 26, and a pair of second electric push rods 27; the filter frame 21 is inserted into the processing box 1 along the slot 11 and plugged into the guide rail 15, and a movable hole 212 and a first plug hole 213 are provided on the top of the filter frame 21, and a second plug hole 214 is provided at the bottom of the filter frame 21. Adjustment shafts 22 that are plugged into each other and can slide are provided on both sides of the filter frame 21, and the two ends of the adjustment shaft 22 are respectively provided in the movable hole 212 and the second plug hole 214. One end of the adjustment shaft 22 is provided with a first top plate 221 and is located in the movable hole 212, which can completely push the plug block 23 out of the movable hole 212.

[0033] The insert block 23 has wedge-shaped surfaces 234 and insert plates 233 at both ends. A fixed connecting plate 231 is provided on one side of the insert block 23 . A fixed connecting column 232 is provided on the connecting plate 231 . The connecting column 232 is a T-shaped column.

[0034] The first electric push rod 25 is fixed on the side wall of the processing box 1, and a top plate 251 is provided on the top shaft of the first electric push rod 25. A T-shaped slot 2511 is provided on the top plate 251 for installing the connecting column 232 and fitting with each other; the two ends of the top plate 251 are provided with a guide column 252 that is fixedly connected and can be retracted, and one end of the guide column 252 is fixedly connected to the fixed plate 28, and the fixed plate 28 is fixed on the side wall of the processing box 1.

[0035] The limit block 26 is arranged in the processing box 1, and the limit block 26 is located between the filter frames 21. A fixed arm 261 is provided on the limit block 26, and the fixed arm 261 passes through the through slot 12. A sealing plate 262 is provided on the fixed arm 261 for sealing the through slot 12 to prevent air leakage. The length of the sealing plate 262 is not less than three times the length of the through slot 12; the second electric push rod 27 is fixed on the side wall of the processing box 1, and the top shaft of the second electric push rod 27 is fixedly connected to the fixed arm 261.

[0036] The heat exchange mechanism 3 includes a coil 31 for passing water and a plurality of blades 32 arranged on the coil 31 for absorbing heat. The coil 31 passes water and absorbs heat to recover the heat for reuse.

[0037] One end of the processing box 1 is provided with a cleaning port 4 that can be opened and closed for cleaning residual dust in the processing box 1 .

[0038] A smelting and sintering industrial waste gas waste heat recovery and treatment device, the working process is as follows:

[0039] Industrial waste gas from smelting and sintering enters the treatment box 1 through the air inlet pipe 13, and then enters the heat exchange mechanism 3 for heat exchange after being filtered by the filter mechanism 2 to realize waste heat recovery and reuse; when the filter 211 is attached with a lot of dust and needs to be replaced, the filter layer in the filter mechanism 2 can be replaced alternately and removed to avoid the filter 211 from being blocked and reducing the waste gas pass rate; among them, the use of alternating replacement can ensure that there is always a pair of filter layers in the filtering work and it continues uninterrupted during the replacement process, which can ensure the continuous filtration of waste gas and waste heat recovery, and ensure work efficiency. The method of removing the filter layer for replacement can also reduce the residual dust in the treatment box.

[0040] When the filter rack 21 is replaced alternately, the working state of the filter mechanism 2 is that one of the filter layers is in filtering operation and the other guide rail 15 is in an empty state; first, the first electric push rod 25 is pushed out, and then the plug block 23 and the plug plate 233 are plugged into the movable hole 212 and the first plug hole 213 on the filter rack 21 to hang and support the filter rack 21, and then the second electric push rod 27 pulls one end of the limit block 26 to slide under the empty guide rail 15, and then the first electric push rod 25 pushes the top shaft back and resets to insert the filter rack 21 along the slot 11 into the processing box 1 and the empty guide rail 15, and the filter rack 21 continues to slide down so that the second plug hole 214 gradually approaches the limit block 26, thereby causing the adjusting shaft 22 to gradually push the limit block 26, thereby causing the adjusting shaft 22 to rise and push the wedge surface 234 of the plug block 23 through the first top plate 221, and finally push the plug block 23 out of the movable hole 212 and the first plug hole 213 on the filter rack 21, further The filter rack 21 that needs to replace the filter layer is lifted up and discharged from the treatment box 1 by the first electric push rod 25, and the filter rack 21 that needs to replace the filter layer is lifted up and discharged from the treatment box 1. Then, the filter rack 21 is removed from the plug block 23 and the clean filter layer is hung on it for timely replacement. It is worth noting that the moving direction of the limit block 26 is opposite to the sliding direction of the plug block 23. Only by moving the limit block 26, the adjustment shaft 22 can be controlled to slide by the limit block 26, and the adjustment shaft 22 slides to control the sliding of the plug block 23. The sliding of the plug block 23 not only releases the plug-in state of the clean filter layer, but also completes the plug-in locking state for the filter layer that needs to be replaced. This structure is simple and convenient to use, and can quickly realize the replacement and installation of the filter layer.

[0041] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In summary, the electronic or electrical components including but not limited to electric push rods are components in the prior art, obtained through private customization or purchase, and the electrical connections between the components are conventional circuit connections or electrical connections in the prior art, and are not within the scope of protection of the present invention;

[0043] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A waste heat recovery and treatment device for waste gas from smelting and sintering industries, comprising a treatment box, a filter mechanism and a heat exchange mechanism provided within the treatment box, the heat exchange mechanism being provided on one side of the filter mechanism; an air inlet pipe and an air outlet pipe being provided at both ends of the treatment box; a slot being provided at the top of the treatment box, through grooves being provided on both side walls of the treatment box, and guide rails being provided on the inner wall of the treatment box; It is characterized by The filter mechanism includes a pair of filter layers composed of a filter frame and a filter screen, a pair of plug blocks, a pair of first electric push rods, a pair of limit blocks, and a pair of second electric push rods; the filter frame is inserted into the processing box along the slot and plugged into the guide rail, the top of the filter frame is provided with a movable hole and a first plug hole, the bottom of the filter frame is provided with a second plug hole, and the filter frame is provided with an adjustment shaft on both sides that is plugged into each other and can slide, and the two ends of the adjustment shaft are respectively provided in the movable hole and the second plug hole; the two ends of the plug block are provided with a wedge surface and a plug plate, a fixed connecting plate is provided on one side of the plug block, and a fixed connecting column is provided on the connecting plate, and the connecting column is provided as a T-shaped column; the first electric push rod is fixed to the side wall of the processing box, and a top plate is provided on the top shaft of the first electric push rod, and a T-shaped slot is provided on the top plate for installing the connecting column and fitting with each other; the limit block is provided in the processing box, the limit block is located between the filter frames, and a fixed arm is provided on the limit block, the fixed arm passes through the through slot, the second electric push rod is fixed to the side wall of the processing box, and the top shaft of the second electric push rod is fixedly connected to the fixed arm.

2. The waste heat recovery and treatment device for smelting and sintering industrial waste gas according to claim 1 is characterized in that The heat exchange mechanism includes a coil for passing water and a plurality of blades arranged on the coil for absorbing heat; the coil passes water and absorbs heat to recover heat for reuse.

3. The waste heat recovery and treatment device for smelting and sintering industrial waste gas according to claim 1 is characterized in that One end of the processing box is provided with a cleaning port that can be opened and closed for cleaning residual dust in the processing box.

4. The waste heat recovery and treatment device for smelting and sintering industrial waste gas according to claim 1 is characterized in that One end of the adjusting shaft is provided with a first top plate which is located in the movable hole and can completely push the inserting block out of the movable hole.

5. The waste heat recovery and treatment device for smelting and sintering industrial waste gas according to claim 1 is characterized in that The top plate has two ends provided with guide columns that are fixedly connected and can be extended. One end of the guide column is fixedly connected to a fixed plate, and the fixed plate is fixed to the side wall of the processing box. The guide column can provide stable support for the top plate to rise.

6. The waste heat recovery and treatment device for smelting and sintering industrial waste gas according to claim 1 is characterized in that A sealing plate is provided on the fixed arm to seal the through slot to prevent air leakage. The length of the sealing plate is not less than three times the length of the through slot to ensure that the through slot can be closed when the limit block moves.

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