Annular roasting furnace waste heat utilization device

Abstract

The utility model relates to the technical field of roasting furnaces, in particular to a ring type roasting furnace waste heat utilization device which comprises a roasting furnace, a pipeline, fan blades and a box body. The box body is arranged above the roasting furnace, and the bottom end of the inner side of the box body is provided with a filter plate for filtering flue gas of the roasting furnace in a use state; the fan blades are installed on the inner side of the box body and located below the filter plate, and the top ends of the fan blades are provided with scraping plates used for rotating on the lower end face of the filter plate according to the middles of the fan blades in the using state; the multiple pipelines are arranged around the roasting furnace and communicate with the roasting furnace. Airflow in the roasting furnace is guided to the fan blades through the multiple pipelines, the fan blades are driven by the airflow to rotate below the filter plate, then the scraping plate is driven to rotate on the lower end face of the filter plate, the lower end face of the filter plate is cleaned by the scraping plate, and the waste heat utilization efficiency is prevented from being affected by dust accumulation on the lower end face of the filter plate.

Description

Technical Field

[0001] This utility model relates to the field of annular roasting furnace technology, specifically to a waste heat utilization device for annular roasting furnace. Background Technology

[0002] The ring-type calcining furnace is one of the main thermal equipment in the carbon production industry. It has high energy consumption and low heat utilization rate. It is generally built underground, with only the furnace cover exposed above ground. The furnace cover is composed of a steel frame and refractory materials. In actual production and use, the surface temperature of the furnace cover in the high-temperature furnace chamber can reach more than 140°C, resulting in significant heat loss.

[0003] Chinese patent document CN214276540U discloses a waste heat recovery and reuse system for a ring-type roasting furnace. The system uses the wind force generated by the flow of exhaust gas to drive a moving component to shake the filter plate. During the filtration process, the particulate matter attached to the surface of the filter plate can be shaken off and collected in a collection box, preventing the particulate matter in the exhaust gas from clogging the filter plate and improving the filtration effect. At the same time, it also avoids the accumulation of heat in the flue gas under the filter plate, which would reduce the utilization effect of heat, thus improving the heat recovery and utilization rate of the device in the flue gas.

[0004] However, in the above scheme, the particulate matter is in a floating state in the flue gas. The filter plate is shaken by moving the component, which has a limited effect on shaking off the particulate matter. Some particulate matter is still adsorbed on the filter plate, which affects the heat recovery efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a waste heat utilization device for a ring-type roasting furnace.

[0006] The technical solution of this utility model is: a waste heat utilization device for a ring-shaped roasting furnace, comprising a roasting furnace, pipes, fan blades, and a housing;

[0007] The box is located above the roasting furnace, and the bottom of the inner side of the box is equipped with a filter plate for filtering the flue gas from the roasting furnace during use.

[0008] The fan blades are installed inside the housing and below the filter plate. The top of the fan blades is equipped with a scraper for rotating on the lower end face of the filter plate according to the middle of the fan blades during use.

[0009] There are multiple pipes, which are arranged around the roasting furnace and connected to it, with one end extending into the inner side of the box and positioned below the fan blades and facing the fan blades.

[0010] Preferably, the housing includes a lower shell, an upper shell, and a cover plate;

[0011] The lower shell is located above the roasting furnace and connected to the pipes;

[0012] The upper housing is bolted to the top of the lower housing and connected to the filter plate;

[0013] The cover plate is bolted to the top of the upper housing.

[0014] Preferably, the pipeline includes a first connecting pipe, a connecting pipe, a second connecting pipe, and a third connecting pipe;

[0015] The first and third connecting pipes are installed on the lower shell and the roasting furnace, respectively, with their ends located on the inner and outer sides of the lower shell and the roasting furnace, respectively.

[0016] The two ends of the second connector are connected to and communicate with the first and third connectors via connecting pipes.

[0017] Preferably, both ends of the second connector are threaded with the ends of the connecting pipe and the first connector, and the threads of the two ends of the second connector and the ends of the connecting pipe and the first connector are arranged symmetrically. The connecting pipe has a threaded hole in the middle. When the second connector is installed in conjunction with the first connector and the third connector, both ends of the second connector and the ends of the connecting pipe and the first connector are fitted into the threaded hole of the connecting pipe.

[0018] Preferably, one end of the first connecting pipe is located inside the lower housing, bent upwards and inclined toward the blades of the fan.

[0019] Preferably, a support ring is provided on the inner side of the lower housing near the top, and a pressure ring is provided on the inner bottom of the upper housing. The scraper is located above the support ring. When the lower housing and the upper housing are installed together, the pressure ring is tightly attached to the upper surface of the filter plate.

[0020] Preferably, a guide plate is provided on the inner side of the lower shell and below one end of the pipe, and the inner diameter of the guide plate gradually decreases from the top of the lower shell to the bottom of the lower shell along the height direction of the lower shell.

[0021] Preferably, a collection box that is slidably connected to the lower shell is provided on the inner side of the roasting furnace and below the middle of the guide plate, and the inner dimension of the collection box is larger than the outer dimension of the bottom end of the guide plate.

[0022] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0023] This invention guides the airflow inside the roasting furnace to the fan blades through multiple pipes, causing the airflow to drive the fan blades to rotate below the filter plate. This, in turn, drives the scraper to rotate on the lower end face of the filter plate, cleaning the lower end face of the filter plate and preventing the accumulation of ash on the lower end face of the filter plate from affecting the waste heat utilization efficiency. Attached Figure Description

[0024] Figure 1This is a perspective view of one embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the inner structure of the lower shell in one embodiment of the present invention.

[0026] Figure 3 This is a cross-sectional schematic diagram of the box structure in one embodiment of the present invention.

[0027] Figure 4 This is an exploded view of the pipeline structure in one embodiment of the present invention.

[0028] Reference numerals: 1. Roasting furnace; 2. Collection box; 3. Lower shell; 4. Upper shell; 5. Cover plate; 6. Pipe; 61. First connecting pipe; 62. Connecting pipe; 63. Second connecting pipe; 64. Third connecting pipe; 7. Guide plate; 8. Fan blade; 9. Scraper; 10. Pressure ring; 11. Supporting ring; 12. Filter plate. Detailed Implementation

[0029] Example 1

[0030] like Figure 1-4 As shown, the present invention proposes a waste heat utilization device for a ring-shaped roasting furnace, comprising a roasting furnace 1, a pipe 6, a fan blade 8, and a housing.

[0031] The box is positioned above the roasting furnace 1, and a filter plate 12 is provided at the bottom of the inner side of the box for filtering the flue gas from the roasting furnace during use.

[0032] The fan blade 8 is installed inside the housing and below the filter plate 12. The top of the fan blade 8 is provided with a scraper 9 for rotating on the lower end face of the filter plate 12 according to the middle of the fan blade 8 during use.

[0033] There are multiple pipes 6, which are arranged around the roasting furnace 1 and connected to the roasting furnace 1, with one end extending into the inner side of the box and located below the fan blade 8 and facing the fan blade 8.

[0034] In this embodiment, the airflow inside the roasting furnace 1 is guided to the inside of the box body through multiple pipes 6. At the same time, the smaller inner size of the pipes 6 results in higher pressure when the airflow moves inside the pipes 6. When the airflow moves towards the blades of the fan blades 8, the pressurized airflow drives the fan blades 8 to rotate below the filter plate 12, which in turn drives the scraper 9 to rotate on the lower end face of the filter plate 12. This allows the scraper 9 to clean the lower end face of the filter plate 12, preventing the lower end face of the filter plate 12 from being affected by ash accumulation, thus improving the waste heat utilization efficiency.

[0035] Example 2

[0036] like Figure 1 and Figure 3As shown, the present invention proposes a waste heat utilization device for a ring-shaped roasting furnace. The difference between this embodiment and the first embodiment is that the box body includes a lower shell 3, an upper shell 4, and a cover plate 5.

[0037] The lower shell 3 is positioned above the roasting furnace 1 and connected to the pipe 6;

[0038] The upper housing 4 is bolted to the top of the lower housing 3 and connected to the filter plate 12;

[0039] The cover plate 5 is bolted to the top of the upper housing 4.

[0040] In this embodiment, the lower housing 3, the upper housing 4, and the cover plate 5 are connected by bolts, making the installation and maintenance of the inner structure of the lower housing 3 and the upper housing 4 more convenient.

[0041] Example 3

[0042] like Figure 4 As shown, the waste heat utilization device for a ring-shaped roasting furnace proposed in this utility model differs from that in Embodiment 1 in that the pipe 6 includes a first connecting pipe 61, a connecting pipe 62, a second connecting pipe 63, and a third connecting pipe 64.

[0043] The first connecting pipe 61 and the third connecting pipe 64 are respectively installed on the lower shell 3 and the roasting furnace 1, and their two ends are located on the inner and outer sides of the lower shell 3 and the roasting furnace 1, respectively.

[0044] The two ends of the second pipe 63 are connected to and communicate with the first pipe 61 and the third pipe 64 via the connecting pipe 62, and are used to transport the airflow inside the roasting furnace 1 into the lower shell 3 during use.

[0045] In an optional embodiment, both ends of the second connector 63 are threaded with the ends of the connecting pipe 62 and the first connector 61, and the threads of the two ends of the second connector 63 and the ends of the connecting pipe 62 and the first connector 61 are arranged symmetrically. The connecting pipe 62 has a threaded hole in the middle. When the second connector 63 is installed in conjunction with the first connector 61 and the third connector 64, both ends of the second connector 63 and the ends of the connecting pipe 62 and the first connector 61 are accommodated in the threaded hole of the connecting pipe 62, so that the second connector 63 can be detachably connected with the first connector 61 and the third connector 64, and it is more convenient to clean the inside of the first connector 61, the third connector 64 and the second connector 63.

[0046] In an optional embodiment, one end of the first pipe 61 is located inside the lower housing 3, bent upward and inclined toward the blades of the fan blade 8, for guiding the airflow toward the blades of the fan blade 8 during use.

[0047] In this embodiment, the second pipe 63 is connected to the first pipe 61 and the third pipe 64 via the connecting pipe 62, so that the first pipe 61 is connected through the third pipe 64, allowing the airflow in the roasting furnace 1 to be delivered to the inside of the lower shell 3. The airflow is effectively guided to flow towards the blades of the fan blade 8 by bending one end of the first pipe 61 and setting it toward the blades of the fan blade 8, so that the airflow drives the fan blade 8 to rotate. At the same time, the setting of the connecting pipe 62 allows the second pipe 63 to be detachably connected to the first pipe 61 and the third pipe 64, making it easier to clean the inside of the first pipe 61, the third pipe 64 and the second pipe 63.

[0048] Example 4

[0049] like Figure 3 As shown, the present invention proposes a waste heat utilization device for a ring-type roasting furnace. Compared with the first embodiment, the difference in this embodiment is that a support ring 11 is provided on the inner side of the lower shell 3 near the top, and a pressure ring 10 is provided on the inner bottom of the upper shell 4. The scraper 9 is located above the support ring 11. When the lower shell 3 and the upper shell 4 are installed together, the pressure ring 10 is tightly attached to the upper surface of the filter plate 12.

[0050] In an optional embodiment, a guide plate 7 is provided on the inner side of the lower housing 3 and below one end of the pipe 6. The inner diameter of the guide plate 7 gradually decreases from the top of the lower housing 3 toward the bottom of the lower housing 3 along the height direction of the lower housing 3.

[0051] In an optional embodiment, a collection box 2 is provided on the inner side of the roasting furnace 1 and below the middle part of the guide plate 7, which is slidably connected to the lower shell 3. The inner dimension of the collection box 2 is larger than the outer dimension of the bottom end of the guide plate 7.

[0052] In this embodiment, the filter plate 12 is supported by the support ring 11. When the filter plate 12 is installed on the lower housing 3 by the upper housing 4, the upper housing 4 drives the pressure ring 10 to press the filter plate 12, so that the filter plate 12 is fixed between the pressure ring 10 and the support ring 11. At the same time, the shape of the guide plate 7 causes the dust inside the lower housing 3 and the dust scraped off the lower end face of the filter plate 12 by the scraper 9 to be guided and collected to the collection box 2. The dust is cleaned by separating the collection box 2 from the lower housing 3.

[0053] In summary, in this utility model, the filter plate 12 is supported by the support ring 11, and the lower housing 3 and the upper housing 4 are connected by bolts, so that the upper housing 4 drives the pressure ring 10 to press the filter plate 12, thereby fixing the filter plate 12 between the pressure ring 10 and the support ring 11. The second connecting pipe 63 is connected to the first connecting pipe 61 and the third connecting pipe 64 through the connecting pipe 62, so that the first connecting pipe 61 is connected through the third connecting pipe 64. At the same time, one end of the first connecting pipe 61 is arranged towards the blades of the fan blade 8, so that the first connecting pipe 61, the second connecting pipe 63 and the third connecting pipe 64 are connected. The airflow in the roasting furnace 1 is directed to the fan blades 8, causing the fan blades 8 to rotate inside the lower housing 3. This, in turn, drives the scraper 9 to rotate on the lower end face of the filter plate 12, cleaning the lower end face of the filter plate 12. This ensures the lower end face of the filter plate 12 is clean and prevents dust accumulation from affecting the waste heat utilization efficiency. At the same time, the shape of the guide plate 7 guides the dust inside the lower housing 3 and the dust scraped off by the scraper 9 on the lower end face of the filter plate 12 to the collection box 2 for collection. By separating the collection box 2 from the lower housing 3, the dust is cleaned.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A waste heat utilization device for a ring-type roasting furnace, characterized in that, The device comprises a roasting furnace (1), a pipeline (6), a fan blade (8) and a box body; The box body is arranged above the roasting furnace (1), and a filter plate (12) for filtering the flue gas of the roasting furnace in the use state is arranged at the bottom of the inner side of the box body; The fan blade (8) is arranged on the inner side of the box body and below the filter plate (12), and the top end of the fan blade (8) is provided with a scraper (9) for rotating on the lower end surface of the filter plate (12) according to the middle part of the fan blade (8) in the use state; The pipeline (6) has a plurality of pipelines (6) arranged around the roasting furnace (1) and connected with the roasting furnace (1), and one end extends to the inner side of the box body and is arranged below the fan blade (8) and towards the fan blade (8).

2. The device for utilizing waste heat of a rotary calcining furnace according to claim 1, wherein The box body comprises a lower shell (3), an upper shell (4) and a cover plate (5); The lower shell (3) is arranged above the roasting furnace (1) and connected with the pipeline (6); The upper shell (4) is bolted to the top end of the lower shell (3) and connected with the filter plate (12); The cover plate (5) is bolted to the top end of the upper shell (4).

3. The device for utilizing waste heat of a rotary calcining furnace according to claim 2, characterized in that, The pipeline (6) comprises a first connecting pipe (61), a connecting pipe (62), a second connecting pipe (63) and a third connecting pipe (64); The first connecting pipe (61) and the third connecting pipe (64) are respectively arranged on the lower shell (3) and the roasting furnace (1), and the two ends are respectively arranged on the inner and outer sides of the lower shell (3) and the roasting furnace (1); The two ends of the second connecting pipe (63) are connected with the first connecting pipe (61) and the third connecting pipe (64) through the connecting pipe (62) and are in communication with them.

4. The device for utilizing waste heat of a rotary calcining furnace according to claim 3, wherein The two ends of the second connecting pipe (63) and the end portions of the connecting pipe (62) and the first connecting pipe (61) are provided with threads, and the threads of the two ends of the second connecting pipe (63) and the end portions of the connecting pipe (62) and the first connecting pipe (61) are arranged in a symmetrical manner, and the middle part of the connecting pipe (62) has a threaded hole, and in the cooperating and mounting state of the second connecting pipe (63) and the first connecting pipe (61) and the third connecting pipe (64), the two ends of the second connecting pipe (63) and the end portions of the connecting pipe (62) and the first connecting pipe (61) are cooperatively accommodated in the threaded hole of the connecting pipe (62).

5. The device for utilizing waste heat of a rotary calcining furnace according to claim 3, wherein One end of the first connecting pipe (61) is bent upwards and inclined towards the blade of the fan blade (8) on the inner side of the lower shell (3).

6. The device for utilizing waste heat of a rotary calcining furnace according to claim 2, wherein A supporting ring (11) is arranged on the inner side of the lower shell (3) close to the top end, a pressing ring (10) is arranged on the inner bottom end of the upper shell (4), and the scraper (9) is arranged above the supporting ring (11), and in the cooperating and mounting state of the lower shell (3) and the upper shell (4), the pressing ring (10) is tightly attached to the upper end surface of the filter plate (12).

7. The device for utilizing waste heat of a rotary calcining furnace according to claim 2, wherein A flow guide plate (7) is arranged on the inner side of the lower shell (3) below one end of the pipeline (6), and the inner diameter value of the flow guide plate (7) is gradually reduced from the top end of the lower shell (3) towards the bottom end of the lower shell (3) along the height direction of the lower shell (3).

8. A device for utilizing waste heat of a rotary calcining furnace according to claim 7, characterized in that, A collecting box (2) is arranged on the inner side of the roasting furnace (1) below the middle part of the flow guide plate (7) and is slidably connected with the lower shell (3), and the inner side dimension value of the collecting box (2) is greater than the outer side dimension value of the bottom end of the flow guide plate (7).

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