Air re-return device of multi-section direct combustion furnace

Abstract

The utility model discloses an air re-return device of a multi-section type direct combustion furnace, which comprises a recovery machine shell, a recovery assembly is fixedly arranged on one side of the recovery machine shell, the recovery assembly comprises a recovery base and a recovery seat, one side of the top end of the recovery base is fixedly connected with the bottom end of the recovery seat, and a length plate is rotatably connected in the recovery seat. A recycling cover is fixedly installed on one side of the length plate, a lifting groove is formed in one side of the inner wall of the recycling machine shell, and the middle of the lead screw is in threaded connection with a lifting block in sliding connection with the lifting groove. The recovery cover collects oxygen or air injected into the multi-section direct combustion furnace, the oxygen or the air is purified through the filter plate and then flows back into the multi-section direct combustion furnace through the release spraying plate on the release mechanism, the injected oxygen or part of the air makes full contact with materials, waste of the oxygen or the air is avoided, and the machining cost of the multi-section direct combustion furnace is reduced.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage direct-fired furnace technology, specifically a recirculation air device for a multi-stage direct-fired furnace. Background Technology

[0002] Multi-stage direct-fired furnaces are characterized by a long waste residence time within the furnace, allowing for greater moisture volatilization. They are suitable for treating sludge with high moisture content and low calorific value, can use various fuels, and have high combustion efficiency. The ability to utilize burners in any layer to increase furnace temperature is also a key feature. Analysis of NOx formation mechanisms shows that by avoiding the excess air coefficient at which NOx formation is maximized during combustion, NOx formation can be significantly reduced. This effect is particularly pronounced when the excess air coefficient is below 1.0. Enriched combustion effectively controls both temperature-induced and fuel-induced NOx, hence the widespread use of multi-stage direct-fired furnaces.

[0003] However, traditional multi-stage direct-fired furnaces have the following drawbacks:

[0004] To ensure complete combustion of materials in a multi-stage direct-fired furnace, a large amount of oxygen or air is injected into it. However, under the impact of a large flow rate, some oxygen or air is discharged directly without contacting the materials, resulting in a waste of oxygen or air and increasing the processing cost of the multi-stage direct-fired furnace. Utility Model Content

[0005] The purpose of this utility model is to provide a recirculation air device for a multi-stage direct-fired furnace, in order to ensure that the material is fully combusted in the multi-stage direct-fired furnace, a large amount of oxygen or air is injected into the multi-stage direct-fired furnace. However, under the impact of the large flow rate, some oxygen or air is discharged directly without contacting the material, resulting in waste of oxygen or air and increasing the processing cost of the multi-stage direct-fired furnace.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a recirculation air device for a multi-stage direct-fired furnace, comprising a recovery housing, a recovery assembly fixedly installed on one side of the recovery housing, the recovery assembly comprising a recovery base and a recovery seat, one side of the top of the recovery base being fixedly connected to the bottom of the recovery seat, a length plate rotatably connected inside the recovery seat, a recovery cover fixedly installed on one side of the length plate, a lifting groove being provided on one side of the inner wall of the recovery housing, a lead screw rotatably connected inside the recovery housing, and a threaded connection at the middle of the lead screw being slidably connected to the lifting groove. The unit includes a lifting block with a purification spray plate fixedly installed on one side. Sliding grooves are provided at the top and bottom of the inner wall of the recycling housing. Sliding blocks are slidably connected inside both sliding grooves. A filter plate is fixedly installed between the two sliding blocks. A release mechanism is provided on one side of the recycling housing. The release mechanism includes a positioning plate and a connecting seat. The top of one side of the positioning plate is fixedly connected to one side of the connecting seat. A displacement groove is provided at the bottom of one side of the positioning plate. An angle plate is rotatably connected inside the connecting seat. A release spray plate is fixedly installed on one side of the angle plate.

[0007] Preferably, an angle cylinder is rotatably connected to the top of the recycling base on the side away from the recycling base. The movable end of the angle cylinder is rotatably connected to the side of the length plate opposite to it. The angle cylinder performs extension and deflection movements. The angle cylinder pushes the length plate from one side, and the length plate deflects along the recycling base. The length plate drives the recycling hood to move synchronously, and the recycling hood collects gas from multiple angles.

[0008] Preferably, the surface of the recovery hood is fixedly connected to an injection hose extending into the interior of the purification spray plate, one side of the recovery base is fixedly connected to the recovery housing, the recovery hood collects the gas in the multi-stage direct-fired furnace, and the collected gas is transported to the purification spray plate through the injection hose.

[0009] Preferably, a screw is rotatably connected inside the displacement groove, a driven umbrella-shaped helical tooth is fixedly installed at one end of the screw, an active umbrella-shaped helical tooth is rotatably connected to one side of the inner wall of the displacement groove, the outer side of the active umbrella-shaped helical tooth meshes with the outer side of the driven umbrella-shaped helical tooth, a displacement block that is slidably connected to the displacement groove is threaded to the middle of the screw, a pull rod is rotatably connected to one side of the displacement block, the end of the pull rod away from the displacement block is rotatably connected to the side of the angle plate opposite to it, and a micro motor that drives the active umbrella-shaped helical tooth to rotate is fixedly installed on the surface of the positioning plate. When the motor is powered on, it starts and drives the active umbrella-shaped helical tooth to rotate. The active umbrella-shaped helical tooth contacts the driven umbrella-shaped helical tooth, and the driven umbrella-shaped helical tooth rotates due to friction. The driven umbrella-shaped helical tooth drives the screw to rotate. The thread on the surface of the screw matches the thread on the inner wall of the displacement block. The displacement block is limited by the displacement groove that matches its shape and size, so the displacement block slides along the screw. During the sliding process of the displacement block, it drives the pull rod to move synchronously. The pull rod pushes the angle plate, causing the angle plate to deflect along the connecting seat, thereby adjusting the release angle of the release spray plate.

[0010] Preferably, springs are fixedly installed on one side of each of the two sliding blocks, and the ends of the two springs away from the sliding blocks are respectively fixedly connected to the opposite side of the two sliding grooves. The sliding blocks slide along the sliding grooves, and the sliding blocks drive the filter plates to move synchronously during the sliding process. The filter plates filter impurities from the gas sprayed by the purification spray plate.

[0011] Preferably, a stepper motor for driving the lead screw is fixedly installed on the surface of the recycling housing. When the stepper motor is powered on, it starts and drives the lead screw to rotate. The thread on the surface of the lead screw matches the thread on the inner wall of the lifting block. The lifting block is limited by the lifting groove that matches its shape and size, so the lifting block slides along the lead screw. During the sliding process of the lifting block, it drives the purification spray plate to move synchronously.

[0012] Preferably, the side of the recovery housing away from the recovery component is fixedly connected to a delivery hose extending into the inside of the release spray plate, and the purified gas inside the recovery housing is delivered to the release spray plate through the delivery hose.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By setting up a recovery component and a release mechanism, the recovery hood collects the oxygen or air injected into the multi-stage direct-fired furnace. After being purified by the filter plate, it flows back into the multi-stage direct-fired furnace through the release spray plate on the release mechanism, so that the injected oxygen or part of the air can fully contact the material, avoiding the waste of oxygen or air and reducing the processing cost of the multi-stage direct-fired furnace. Attached Figure Description

[0015] Figure 1This is a side view of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the release mechanism of this utility model;

[0018] Figure 4 This is a side view of the recycling component of this utility model.

[0019] In the diagram: 1. Recycling housing; 2. Recycling components; 21. Recycling base; 22. Angle cylinder; 23. Injection hose; 24. Length plate; 25. Recycling cover; 26. Recycling seat; 3. Stepper motor; 4. Conveying hose; 5. Release mechanism; 501. Positioning plate; 502. Connecting seat; 503. Release spray plate; 504. Angle plate; 505. Pull rod; 506. Driven umbrella-shaped helical tooth; 507. Active umbrella-shaped helical tooth; 508. Micro motor; 509. Screw; 510. Displacement block; 511. Displacement groove; 6. Lifting groove; 7. Lead screw; 8. Sliding groove; 9. Filter plate; 10. Spring; 11. Sliding block; 12. Purification spray plate; 13. Lifting block. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1-4 This utility model provides a recirculation air device for a multi-stage direct-fired furnace, including a recovery housing 1. A recovery assembly 2 is fixedly installed on one side of the recovery housing 1. The recovery assembly 2 includes a recovery base 21 and a recovery seat 26. One side of the top of the recovery base 21 is fixedly connected to the bottom of the recovery seat 26. A length plate 24 is rotatably connected inside the recovery seat 26. A recovery cover 25 is fixedly installed on one side of the length plate 24. A lifting groove 6 is opened on one side of the inner wall of the recovery housing 1. A lead screw 7 is rotatably connected inside the recovery housing 1. A lifting block 13, which is slidably connected to the lifting groove 6, is threaded in the middle of the lead screw 7. One side of the lifting block 13 is fixed. The recycling housing 1 is equipped with a purification spray plate 12. Sliding grooves 8 are provided at the top and bottom of the inner wall of the recycling housing 1. Sliding blocks 11 are slidably connected inside the two sliding grooves 8. Filter plates 9 are fixedly installed between the two sliding blocks 11. A release mechanism 5 is provided on one side of the recycling housing 1. The release mechanism 5 includes a positioning plate 501 and a connecting seat 502. The top of one side of the positioning plate 501 is fixedly connected to one side of the connecting seat 502. A displacement groove 511 is provided at the bottom of one side of the positioning plate 501. An angle plate 504 is rotatably connected inside the connecting seat 502. A release spray plate 503 is fixedly installed on one side of the angle plate 504.

[0022] An angle cylinder 22 is rotatably connected to the top of the recovery base 21 on the side away from the recovery seat 26. The movable end of the angle cylinder 22 is rotatably connected to the side of the length plate 24 facing each other. The angle cylinder 22 performs extension and deflection movements. The angle cylinder 22 pushes the length plate 24 from one side. The length plate 24 deflects along the recovery seat 26. The length plate 24 drives the recovery cover 25 to move synchronously. The recovery cover 25 collects gas from multiple angles.

[0023] The surface of the recovery hood 25 is fixedly connected to an injection hose 23 extending into the interior of the purification spray plate 12. One side of the recovery base 21 is fixedly connected to the recovery housing 1. The recovery hood 25 collects the gas in the multi-stage direct-fired furnace, and the collected gas is transported to the purification spray plate 12 through the injection hose 23.

[0024] A screw 509 is rotatably connected inside the displacement groove 511. A driven umbrella-shaped helical tooth 506 is fixedly installed at one end of the screw 509. An active umbrella-shaped helical tooth 507 is rotatably connected to one side of the inner wall of the displacement groove 511. The outer side of the active umbrella-shaped helical tooth 507 meshes with the outer side of the driven umbrella-shaped helical tooth 506. A displacement block 510 is threadedly connected to the middle of the screw 509 and slidably connected to the displacement groove 511. A pull rod 505 is rotatably connected to one side of the displacement block 510. The end of the pull rod 505 away from the displacement block 510 is rotatably connected to the side of the angle plate 504 opposite to it. A micro motor 508 that drives the active umbrella-shaped helical tooth 507 to rotate is fixedly installed on the surface of the positioning plate 501. The micro motor 508 starts when energized. The motor 508 drives the active umbrella-shaped helical tooth 507 to rotate. The active umbrella-shaped helical tooth 507 contacts the driven umbrella-shaped helical tooth 506. The driven umbrella-shaped helical tooth 506 rotates due to friction. The driven umbrella-shaped helical tooth 506 drives the screw 509 to rotate. The thread on the surface of the screw 509 matches the thread on the inner wall of the displacement block 510. The displacement block 510 is limited by the displacement groove 511, which matches its shape and size. Therefore, the displacement block 510 slides along the screw 509. During the sliding process, the displacement block 510 drives the pull rod 505 to move synchronously. The pull rod 505 pushes the angle plate 504, causing the angle plate 504 to deflect along the connecting seat 502, thereby adjusting the release angle of the release spray plate 503.

[0025] Springs 10 are fixedly installed on one side of each of the two sliding blocks 11. The ends of the two springs 10 away from the sliding blocks 11 are fixedly connected to the opposite side of the two sliding grooves 8. The sliding blocks 11 slide along the sliding grooves 8. During the sliding process, the sliding blocks 11 drive the filter plates 9 to move synchronously. The filter plates 9 filter impurities from the gas sprayed by the purification spray plate 12.

[0026] A stepper motor 3 that drives the lead screw 7 to rotate is fixedly installed on the surface of the recycling housing 1. After the stepper motor 3 is powered on, it starts and drives the lead screw 7 to rotate. The thread on the surface of the lead screw 7 matches the thread on the inner wall of the lifting block 13. The lifting block 13 is limited by the lifting groove 6 that matches its shape and size. Therefore, the lifting block 13 slides along the lead screw 7. During the sliding process of the lifting block 13, it drives the purification spray plate 12 to move synchronously.

[0027] The side of the recovery housing 1 away from the recovery component 2 is fixedly connected to a delivery hose 4 that extends into the release spray plate 503. The purified gas in the recovery housing 1 is delivered to the release spray plate 503 through the delivery hose 4.

[0028] In this embodiment, during use: the angle cylinder 22 performs extension and deflection movements, pushing the length plate 24 from one side. The length plate 24 deflects along the recovery seat 26, causing the recovery hood 25 to move synchronously. After the angle of the recovery hood 25 is adjusted, it recovers gas, facilitating gas collection from multiple angles. The recovery hood 25 collects gas from the multi-stage direct-fired furnace, and the collected gas is delivered to the purification spray plate 12 through the injection hose 23. The stepper motor 3 starts after being powered on, driving the lead screw 7 to rotate. The thread on the surface of the lead screw 7 matches the thread on the inner wall of the lifting block 13. The lifting block 13 is limited by the lifting groove 6, which matches its shape and size, so the lifting block 13 slides along the lead screw 7. During the sliding process, the lifting block 13 drives the purification spray plate 12 to move synchronously, spraying gas. The sliding block 11 slides along the sliding groove 8. During the sliding process of block 11, the filter plate 9 moves synchronously. The filter plate 9 filters impurities from the gas sprayed by the purification spray plate 12. The purified gas is delivered to the release spray plate 503 through the delivery hose 4. After the micro motor 508 is powered on, it starts and drives the active umbrella-shaped helical tooth 507 to rotate. The active umbrella-shaped helical tooth 507 contacts the driven umbrella-shaped helical tooth 506. The driven umbrella-shaped helical tooth 506 rotates due to friction. The driven umbrella-shaped helical tooth 506 drives the screw 509 to rotate. The thread on the surface of the screw 509 matches the thread on the inner wall of the displacement block 510. The displacement block 510 is limited by the displacement groove 511, which matches its shape and size. Therefore, the displacement block 510 slides along the screw 509. During the sliding process of the displacement block 510, it drives the pull rod 505 to move synchronously. The pull rod 505 pushes the angle plate 504, causing the angle plate 504 to deflect along the connecting seat 502, thereby adjusting the release angle of the release spray plate 503.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A recirculation air device for a multi-stage direct-fired furnace, comprising a recirculation casing (1), characterized in that: A recycling assembly (2) is fixedly installed on one side of the recycling housing (1). The recycling assembly (2) includes a recycling base (21) and a recycling seat (26). One side of the top of the recycling base (21) is fixedly connected to the bottom of the recycling seat (26). A length plate (24) is rotatably connected inside the recycling seat (26). A recycling cover (25) is fixedly installed on one side of the length plate (24). A lifting groove (6) is opened on one side of the inner wall of the recycling housing (1). A lead screw (7) is rotatably connected inside the recycling housing (1). A lifting block (13) that is slidably connected to the lifting groove (6) is threaded in the middle of the lead screw (7). A purification spray plate (12) is fixedly installed on one side of the lifting block (13). (1) A sliding groove (8) is provided at the top of the inner wall and the bottom of the inner wall of the recycling housing (1). A sliding block (11) is slidably connected inside the two sliding grooves (8). A filter plate (9) is fixedly installed between the two sliding blocks (11). A release mechanism (5) is provided on one side of the recycling housing (1). The release mechanism (5) includes a positioning plate (501) and a connecting seat (502). The top of one side of the positioning plate (501) is fixedly connected to one side of the connecting seat (502). A displacement groove (511) is provided at the bottom of one side of the positioning plate (501). An angle plate (504) is rotatably connected inside the connecting seat (502). A release spray plate (503) is fixedly installed on one side of the angle plate (504).

2. The recirculation air device for a multi-stage direct-fired furnace according to claim 1, characterized in that: An angle cylinder (22) is rotatably connected to the top of the recycling base (21) away from the recycling base (26), and the movable end of the angle cylinder (22) is rotatably connected to the side of the length plate (24) opposite to it.

3. The recirculation air device for a multi-stage direct-fired furnace according to claim 1, characterized in that: The surface of the recycling hood (25) is fixedly connected to an injection hose (23) extending into the interior of the purification spray plate (12), and one side of the recycling base (21) is fixedly connected to the recycling housing (1).

4. The recirculation air device for a multi-stage direct-fired furnace according to claim 1, characterized in that: A screw (509) is rotatably connected inside the displacement groove (511). A driven umbrella-shaped helical tooth (506) is fixedly installed at one end of the screw (509). An active umbrella-shaped helical tooth (507) is rotatably connected to one side of the inner wall of the displacement groove (511). The outer side of the active umbrella-shaped helical tooth (507) meshes with the outer side of the driven umbrella-shaped helical tooth (506). A displacement block (510) that slides in connection with the displacement groove (511) is threadedly connected to the middle of the screw (509). A pull rod (505) is rotatably connected to one side of the displacement block (510). The end of the pull rod (505) away from the displacement block (510) is rotatably connected to the side of the angle plate (504). A micro motor (508) that drives the active umbrella-shaped helical tooth (507) to rotate is fixedly installed on the surface of the positioning plate (501).

5. The recirculation air device for a multi-stage direct-fired furnace according to claim 1, characterized in that: Springs (10) are fixedly installed on one side of each of the two sliding blocks (11), and the ends of the two springs (10) away from the sliding blocks (11) are fixedly connected to the sides of the two sliding grooves (8) respectively.

6. The recirculation air device for a multi-stage direct-fired furnace according to claim 1, characterized in that: A stepper motor (3) that drives the lead screw (7) to rotate is fixedly installed on the surface of the recycling housing (1).

7. The recirculation air device for a multi-stage direct-fired furnace according to claim 1, characterized in that: The side of the recycling housing (1) away from the recycling assembly (2) is fixedly connected to a delivery hose (4) extending into the release spray plate (503).

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