Dust collecting device and regenerative incinerator

Abstract

This application discloses a dust collection device and a regenerative thermal oxidizer. The dust collection device includes a dust collection section and a dust suction section. The dust collection section has an inlet for airflow, and the dust suction section is connected to the dust collection section for sucking up the dust collected by the dust collection section. The dust collection device also includes a rotatable cover. When the airflow is towards or away from the inlet, the cover can rotate under the action of the airflow to move away from or seal the inlet accordingly. The regenerative thermal oxidizer of this application has a dust collection device in the chamber, which can collect the dust formed by the combustion of flue gas in the furnace body of the incinerator in a timely manner, so as to facilitate the unobstructed flow of the heat storage body and reduce or avoid downtime and energy loss caused by equipment maintenance. Moreover, when the airflow is away from the inlet, the cover of the dust collection device can be pushed to rotate to seal the inlet, so as to prevent the collected dust from being blown back into the chamber.

Description

Technical Field

[0001] This application relates to the field of waste gas treatment technology, specifically to a dust collection device and a regenerative thermal oxidizer. Background Technology

[0002] Regenerative thermal oxidizers (RTOs) are one of the mainstream technologies for treating VOCs. This technology involves feeding VOC-containing organic waste gas into the incinerator furnace, where it is burned at a high temperature of nearly 800°C, decomposing the organic components into harmless carbon dioxide and water. The furnace of a RTO is equipped with a heat storage medium, such as a ceramic heat storage medium, to preheat the waste gas.

[0003] However, VOCs waste gas, after being burned at high temperatures in the furnace of a regenerative thermal oxidizer, produces particulate dust, such as SiO2. After a period of exposure to high temperatures, this dust easily solidifies with the ceramic heat exchanger. While compressed air purging or water spraying are commonly used for cleaning, the treatment effect is not significant. If the cleaning effect is insufficient to maintain the preheating function, the unblocked ceramic heat exchanger must be replaced, increasing operating costs. Correspondingly, cleaning or replacement requires equipment shutdown for maintenance, which not only disrupts normal production and prevents waste gas treatment, causing air pollution, but also wastes a significant amount of energy during equipment shutdown for cooling and subsequent heating. Furthermore, replacing the ceramic heat exchanger is often time-consuming and labor-intensive. Summary of the Invention

[0004] This application provides a dust collection device, which includes a dust collection section and a dust suction section. The dust collection section has an inlet for airflow to enter, and the dust suction section is connected to the dust collection section for sucking up the dust collected by the dust collection section. The dust collection device also includes a rotatable cover. When the airflow is towards or away from the inlet, the cover can rotate under the action of the airflow to move away from the inlet or seal the inlet accordingly.

[0005] In one specific embodiment, the dust collection section includes two dust collection plates arranged at an angle, the two dust collection plates forming a flared end and a constricted end, the flared end forming the inlet, and the constricted end forming the outlet of the dust collection section.

[0006] In one specific embodiment, the dust collection unit includes a dust collection pipe, and one side of the dust collection pipe has an opening extending along its length direction. The opening is connected to the constricted end to connect the dust collection unit and the dust collection unit.

[0007] In one specific embodiment, the dust collection device is disposed above the heat storage body; the length direction of the dust collection plate is parallel to the horizontal direction, the flared end faces upward, and the constricted end faces downward.

[0008] In one specific embodiment, the surfaces of the two dust collection plates arranged opposite each other are called dust collection surfaces, and the dust collection surfaces are provided with multiple hanging plates.

[0009] In one specific embodiment, the dust collection unit further includes an outlet and a discharge outlet, the discharge outlet being connected to the dust collection unit.

[0010] This application also provides a regenerative thermal oxidizer, including a furnace body, a heat storage medium disposed in a chamber of the furnace body, and a dust collection device as described in any of the above claims disposed in the chamber.

[0011] In one specific embodiment, the chamber is provided with a vent that connects to the chamber, and airflow can enter the chamber through the vent; the regenerative incinerator also includes a pipeline that connects the dust collection unit and the vent, and the pipeline is provided with a filter dust removal component.

[0012] In one specific embodiment, the regenerative incinerator further includes a waste heat recovery device, the dust collection section is connected to the waste heat recovery device, and the waste heat recovery device is located in the chamber and positioned below the heat storage body corresponding to the airflow entering.

[0013] In one specific implementation, it further includes:

[0014] Multiple heat storage elements and corresponding multiple vents;

[0015] Multiple first control valves, each corresponding to one of the multiple vents, are used to control the flow of air into or out of the vents;

[0016] The waste heat recovery device corresponding to each of the multiple heat storage bodies;

[0017] Multiple second control valves are provided, each second control valve being located between one of the waste heat recovery devices and the dust collection device. The first control valve controls one of the vents to allow airflow, and then controls the second control valve to connect the waste heat recovery device and the dust collection device below the heat storage body corresponding to the vent that allows airflow, while the remaining waste heat recovery devices are disconnected from the dust collection device.

[0018] In one specific embodiment, the dust collection section and the dust suction section form a dust collection assembly, and the dust collection device includes multiple rows of the dust collection assembly.

[0019] The regenerative thermal oxidizer described in this application is equipped with a dust collection device within its chamber. This device can collect dust generated during the combustion of flue gas within the incinerator in a timely, online manner, ensuring unobstructed flow of the regenerative thermal oxidizer and reducing or preventing downtime and energy loss due to equipment maintenance. Furthermore, the dust collection device is equipped with a cover. When the airflow moves away from the inlet, the cover rotates to seal the inlet of the dust collection section, preventing collected dust from being blown back into the chamber. Simultaneously, when the airflow flows towards the inlet, the cover rotates to a position below the dust collection device, intensifying the airflow turbulence in localized areas. This, combined with the intense collision between the dust collection plates and dust particles, promotes dust aggregation and transfer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the regenerative incinerator provided in the embodiments of this application;

[0021] Figure 2 for Figure 1 A schematic diagram of the central dust collection section viewed from the left.

[0022] Figure 3 For airflow in Figure 1 Schematic diagram of the first flow direction inside the furnace body 1;

[0023] Figure 4 For airflow in Figure 1 A schematic diagram of the second flow direction within the central furnace body 1;

[0024] Figure 5 For airflow in Figure 1 A schematic diagram of the third flow direction within the central furnace body 1;

[0025] Figure 6 for Figure 2 A schematic diagram showing the dust collection device's cover rotating to the top;

[0026] Figure 7 for Figure 2 Left view of the dust collection section and the dust suction section;

[0027] Figure 8 A schematic diagram showing another type of airflow passing through the dust collection section;

[0028] Figure 9 for Figure 1 Schematic diagram of a waste heat recovery device;

[0029] Figure 10 for Figure 3 Sectional view along axis AA;

[0030] Figure 11 for Figure 4 BB-direction sectional view;

[0031] Figure 12 for Figure 5 CC-direction sectional view.

[0032] Figure 1-12 The labels in the attached figures are as follows:

[0033] 1-Furnace body; 1a-Cavity;

[0034] 2-Heat storage body;

[0035] 3-Dust collection device; 31-Dust collection section; 311-Dust collection plate; 312-Hanging plate; 32-Dust suction section; 33-Connecting pipe; 34-Cover;

[0036] 4-Combiner box;

[0037] 5-Insulation layer;

[0038] 6- Waste heat recovery device; 61- Heat exchanger tube;

[0039] 7- Filter and dust removal components;

[0040] 8-Exhaust fan;

[0041] 9-Exhaust duct;

[0042] 10-Fluorisendust;

[0043] 11-First control valve;

[0044] 12 - Second control valve. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the regenerative incinerator provided in the embodiments of this application.

[0047] The regenerative thermal oxidizer in this embodiment includes a furnace body 1, the interior of which is a chamber 1a, i.e., the furnace chamber. A heat storage element 2 is installed in chamber 1a. The heat storage element 2 can be a ceramic heat storage element with a honeycomb structure, enabling heat recycling. After the waste gas (hereinafter referred to as flue gas) enters chamber 1a, the heat storage element 2 can preheat the waste gas (below 100°C) to 600-800°C, thereby saving a large amount of thermal energy required for combustion within the furnace body 1. Here, the flue gas mainly refers to VOCs (Volatile Organic Compounds). High-temperature combustion within the furnace body 1 decomposes the organic components in the flue gas into harmless carbon dioxide and water. In this embodiment, the VOCs flue gas also includes organosilicon, which produces particulate matter, i.e., particulate dust, such as SiO2, after high-temperature combustion. Of course, if the VOCs flue gas includes other components, particulate matter may also be produced during combustion, subsequently generating dust (or defined as ash).

[0048] Figure 1 In the furnace body 1, three heat storage bodies 2 are arranged in chamber 1a. Figure 1 The components are distributed from left to right. The inner walls of chamber 1a are equipped with an insulation layer; the walls can be constructed from welded steel plates and profiles. Figure 1 In addition to the outer walls, there are also walls between the outer walls for separation from the outside. The inner side of these walls is also covered with an insulation layer 5. Thus, the insulation layer 5 and the corresponding walls divide the lower part of chamber 1a into three sub-cavities. Each sub-cavity contains a heat storage body 2, which fills the sub-cavity. The heat storage body 2 can be a separate or integral structure; this embodiment does not impose any restrictions. The insulation layer 5 is not arranged along the entire height of chamber 1a; the space above the insulation layer 5 in chamber 1a remains interconnected. Therefore, chamber 1a is roughly M-shaped, and the flue gas mainly burns in the upper space of chamber 1a. Figure 1 An ignition device (shown as a flame) is provided at the top of the middle part of chamber 1a to maintain the high temperature of the combustion chamber for burning flue gas. Each sub-chamber has a vent at the bottom, through which the flue gas can enter chamber 1a or the airflow in chamber 1a can flow out through the vent.

[0049] In this embodiment, a dust collection device 3 is also provided in the chamber 1a of the furnace body 1. The dust collection device 3 includes a dust collection section 31 and a dust suction section 32. The dust collection section 31 has an inlet for the flue gas to enter, and the dust in the airflow in the chamber 1a (such as SiO2 generated after combustion) can be collected in the dust collection section 31. The dust suction section 32 is connected to the dust collection section 31 and is used to suck up the dust collected by the dust collection section 31.

[0050] Please continue to refer to this. Figure 2 , Figure 2 for Figure 1 A schematic diagram of the central dust collection section 31 and the dust suction section 32 from a left-hand view.

[0051] In this embodiment, the dust collection section 31 specifically includes two dust collection plates 311 arranged at an angle, roughly in a V-shape. When the two dust collection plates 311 are combined, the ends farther apart form a flared end 3a, and the ends closer together form a constricted end 3b. The flared end 3a is the inlet of the dust collection section 31, and the constricted end 3b is the outlet. The flue gas entering the chamber 1a can enter between the two dust collection plates 311 from the inlet, and the direction of the airflow is... Figure 2 The direction indicated by the black arrow. The dust collection section 31 may also include more plate structures, such as the two dust collection plates 311, whose sides may also be covered by plate structures.

[0052] The opposing surfaces of the two dust collection plates 311 form a dust collection surface. Particulate dust generated during the combustion of flue gas in chamber 1a, as well as particulate dust that may be present in the flue gas before entering chamber 1a, can collide with the dust collection surface of the dust collection plates 311, thereby collecting the dust. It should be noted that the flue gas can also be filtered before entering chamber 1a, but dust may still inevitably remain in the flue gas. The dust collection device 3 in this embodiment can further collect this dust. Of course, in this embodiment, the main focus is on collecting the dust generated inside chamber 1a during the high-temperature combustion of the flue gas.

[0053] To further improve dust collection efficiency, multiple hanging plates 312 can be installed on the dust collection surface of the dust collection plate 311. The extending direction of the hanging plates 312 can be perpendicular to the airflow direction, such as... Figure 2 As shown, the hanging plate 312 can also have an angle greater than zero with the airflow direction. In this way, the airflow can collide with the hanging plate 312, which can enhance the collision of particles in the airflow in the dust collection section 31, thereby improving the dust collection efficiency and preventing particles in the airflow from escaping out of the dust collection section 31 after entering the dust collection section 31 due to eddies and other effects.

[0054] At this time, the constricted end 3b formed by the two dust collection plates 311 serves as the outlet. The constricted end 3b can be directly connected to the suction unit 32. The suction unit 32 can generate negative pressure to perform suction function. Specifically, the suction unit 32 can be connected to... Figure 1 The induced draft fan 8, located outside the furnace body 1, is connected via pipelines, thereby generating negative pressure in the dust collection section 32. Under the action of negative pressure, the dust collected by the two dust collection plates 311 and the dust-laden airflow entering between the two dust collection plates 311 can be sucked into the dust collection section 32. Figure 2 The dust suction section 32 shown in the diagram is specifically a dust suction pipe, and the constricted end 3b of the dust collection section 31 is directly connected to the dust suction pipe.

[0055] Therefore, the regenerative incinerator in this embodiment is equipped with a dust collection device 3 in the chamber 1a, which can collect the dust formed by the combustion of flue gas in the furnace body in a timely manner, so as to facilitate the unobstructed flow of the heat storage body 2, thereby reducing or avoiding downtime and energy loss caused by equipment shutdown and maintenance.

[0056] Please continue to refer to this. Figure 3-5 understand, Figure 3 For airflow in Figure 1 Schematic diagram of the first flow direction inside the furnace body 1; Figure 4 For airflow in Figure 1 A schematic diagram of the second flow direction within the central furnace body 1; Figure 5 For airflow in Figure 1 A schematic diagram of the third flow direction within the furnace body 1.

[0057] The bottom of the furnace body 1 is provided with vents. Flue gas can flow in through these vents or exit after combustion. The number of vents is the same as the number of chambers divided by chamber 1a, corresponding to... Figure 1 The three chambers Figure 1 Correspondingly, three vents (not shown in the diagram) will be provided for each compartment. For example... Figure 1 As shown, the bottom of the furnace body 1 is also provided with a flue 10 for the flow of flue gas. The flue 10 is also equipped with three first control valves 11 connected to each air inlet. The first control valve 11 is specifically a push valve. Each first control valve 11 can control the flow of flue gas into the corresponding compartment or out of the compartment. That is, the flow direction of the airflow in the furnace body 1 is not fixed. It is generally set to change, such as periodic change. This is conducive to the recycling of the heat stored in the heat storage body, ensuring the temperature of the combustion chamber, and making the exhaust gas fully combustible.

[0058] Figure 3-5 The diagram illustrates three flow directions: one vent in a compartment is used for flue gas to enter, another vent in a compartment is used for flue gas to exit, and a third vent in a compartment is used to purge the VOC-containing flue gas that flowed in from the previous cycle, thus cleaning the compartment and preparing for the exit of clean flue gas in the next cycle. Figure 3 In the middle, the left chamber receives flue gas, the middle chamber discharges flue gas, and the right chamber purges flue gas. The airflow direction in the upper part of chamber 1a is mainly from left to right. Figure 4 In the middle, the left chamber is used to purge the flue gas, the middle chamber is used to enter the flue gas, and the right chamber is used to exit the flue gas. The airflow direction in the upper part of chamber 1a is from the middle to the left and right sides respectively. Figure 5 In the middle chamber 1a, flue gas flows out from the left side chamber, is purged from the middle chamber, and enters from the right side chamber. The airflow direction in the upper part of chamber 1a is from right to left. That is, the airflow direction in chamber 1a of furnace body 1 will change.

[0059] It is understood that three chambers are for illustration purposes, and there can be other numbers of chambers, such as four chambers, two for air intake, one for air outlet, and one for air blowing, or one for air intake, two for air outlet, and one for air blowing, etc. This embodiment will not list them all. Here, we mainly explain that the airflow direction in chamber 1a can change according to the selection of the working mode based on the specific structure of the regenerative thermal incinerator. Of course, the air intake, air outlet, and air blowing of the regenerative thermal incinerator can also be fixed and the airflow direction does not change.

[0060] In response to the possibility of changes in airflow, in this embodiment, the dust collection device 3 is positioned above the heat storage body 2, and the airflow direction is mainly upward or downward. Figure 2 In the dust collection section 31, the flared end 3a faces upward and the constricted end 3b faces downward. This ensures that dust-laden airflow will only enter the dust collection section 31 from the inlet when the airflow is downward. When the airflow is downward, dust tends to accumulate downward under the influence of gravity and easily enters the heat storage body 2 below. However, when the airflow is upward, the dust moves upward and will not accumulate in the heat storage body 2, so dust collection is not required.

[0061] Of course, you can also set it to... Figure 2 Dust collection devices 3 are arranged in opposite positions, i.e., the inlet of the dust collection section 31 faces downwards, to collect dust from the upward airflow. Alternatively, dust collection devices 3 with both upward and downward inlets can be arranged simultaneously, allowing dust collection to be performed whether the airflow is rising or falling. This embodiment only includes such devices. Figure 2 The dust collection device 3 shown can collect as much dust as possible from the downward airflow within a limited space to improve dust collection efficiency.

[0062] Please continue to refer to this. Figure 6 , Figure 6 for Figure 2 A schematic diagram showing the cover 34 of the dust collection device 3 rotating upwards.

[0063] In this embodiment, the dust collection device 3 is equipped with a cover 34, which is rotatable. Figure 2 , 3 Specifically, it is rotatably connected to the dust collection section 32. Obviously, it can also be rotatably connected to the dust collection section 31 or to other parts inside the furnace body 1, as long as the cover 34 can rotate to the inlet of the dust collection section 31 under the action of airflow to seal the inlet or rotate to leave the inlet. Figure 2The middle cover 34 includes a connecting part 342 and a cover part 341. The cover part 341 is used to seal the inlet and is configured as an arc-shaped cover plate. One end of the connecting part is hinged to the dust collection part 32, and the other end is connected to the arc-shaped cover plate. The arc-shaped cover part 341 facilitates rotation of the cover part 341 away from the inlet, avoiding interference with the dust collection part 31 during rotation. It can be understood that while the cover 34 seals the inlet of the dust collection part 31, it does not necessarily need to be completely sealed. A certain degree of coverage is sufficient to prevent airflow from entering the dust collection part 31 and carrying away dust when airflow reverses.

[0064] like Figure 2 As shown, when the airflow descends, under the propulsion of the airflow and the action of gravity, the cover 34 rotates downwards, leaving the inlet. This allows the dust-laden airflow to enter the dust collection section 31 for dust collection. Simultaneously, the lower arc-shaped cover 34 intensifies the airflow turbulence in a localized area of ​​the dust collection device, and, combined with the intense collision between the hanging plate 312 and dust particles, promotes dust collection. Figure 6 As shown, when the airflow rises, the cover 34 rotates upwards under the propulsion of the airflow to seal the entrance of the dust collection section 31, thus ceasing dust collection. Due to the sealing effect of the cover 34, dust collected in the dust collection section 31, as well as dust collected but not yet sucked away by the suction section 32, can remain inside the dust collection section 31 and will not be blown away by the upward airflow and re-enter the chamber 1a. Therefore, to improve the flexibility of the cover 34's rotation, lightweight manufacturing can be adopted as much as possible, such as using lightweight and high-temperature resistant materials. The thickness of the cover 34 can be as thin as possible, for example, controlled to within 1 mm. Even better, the thickness of the cover 34 can be less than or equal to 0.5 mm.

[0065] Please continue to refer to this. Figure 7 , Figure 7 for Figure 2 Left view of the dust collection section 31 and the suction section 32.

[0066] In this embodiment, the dust suction section 32 is specifically a dust suction pipe. One side of the dust suction pipe has an opening extending along its length. It can also be understood that the dust suction pipe has a U-shaped groove structure, and the groove is the opening. The opening of the dust suction pipe is connected to the constricted end 3b of the dust collection section 31 to connect the dust collection section 31 and the dust suction section 32. The dust suction pipe and the two dust collection plates 311 can be fixedly connected or integrally set.

[0067] like Figure 7 As shown, the length of the constricted end 3b is the same as the length of the dust collection plate 311. The width of the dust collection plate 311 is the distance between the side of the dust collection plate 311 located at the flared end 3a and the side of the dust collection plate 311 located at the constricted end 3b, and the length direction is perpendicular to the width direction. Thus, the dust collection pipe and the dust collection section 31 are assembled and fitted together to form... Figure 2 , 6The Y-shaped structure is shown. The suction pipe should ideally occupy as little volume as possible to facilitate the generation of negative pressure, for example... Figure 2 , 6 In this design, the suction pipe is relatively thin and narrow, and is a flat pipe, which also helps to reduce weight. At this time, the suction pipe is connected to the constricted end 3b, which is also the outlet of the dust collection section 31. That is, in addition to sucking away the dust collected by the dust collection section 31, the suction pipe also sucks away a portion of the smoke.

[0068] The V-shaped dust collection section 31 described above facilitates the passage of a larger inlet (in this embodiment, i.e.) Figure 2 The flared end 3a) shown draws airflow into the dust collection section 31. Due to the V-shaped cross-section change, dust in the airflow easily collides with the dust collection surface of the dust collection plate 311 and is collected. Furthermore, the suction pipe of the suction section 32 connects with the constricted end 3b of the dust collection section 31, facilitating the direct entry of dust-laden airflow into the suction pipe for extraction. It can be understood that the suction section 32 and the dust collection section 31 can also be connected in other ways. For example, the constricted end 3b of the dust collection section 31 can be closed but a connection port can be reserved as the outlet of the dust collection section 31. The suction section 32 can be a pipe capable of forming negative pressure and can be connected to this connection port. In this embodiment, the Y-shaped structure of the connection allows the suction section 32 to more comprehensively extract the dust-laden airflow and collected dust in the dust collection section 31.

[0069] The structure of the dust collection section 31 is not limited to a V-shape; for example, it can be set to a conical or cylindrical shape. In order to increase the collision of dust inside the dust collection section 31, the dust collection plate 311 of the dust collection section 31 is not limited to being set to a V-shape. Figure 2 The hanging plate 312 shown, such as the dust collection plate 311, has multiple protrusions or grooves on its dust collection surface, or the dust collection plate 311 itself is a corrugated plate, etc.

[0070] It should be noted that the dust collection section 31 is not limited to connecting its outlet to the suction section 32. The dust collection section 31 may have an inlet and an outlet distributed along the airflow direction. After the airflow enters the dust collection section 31, the dust is collected in the dust collection section 31, and part or most of the airflow flows out from the outlet and continues to be located in the chamber 1a. The dust collection section 31 is also provided with an outlet, which is connected to the suction section 32. In this way, the suction section 32 can suck in the collected dust and part of the airflow entering the dust collection section 31. When the outlet of the dust collection section 31 is connected to the suction section 32, all or most of the airflow entering the dust collection section 31 will be sucked in by the suction section 32.

[0071] For reference Figure 8 understand, Figure 8This is a schematic diagram of another type of airflow passing through the dust collection section 31. In this design, the dust collection section 32 can perform suction in a direction perpendicular to the xy plane, or an outlet can be provided on the dust collection plate 311 and connected to the dust collection section 32.

[0072] It can be seen that, Figure 8 Different from Figure 2 The embodiment is intended to illustrate that the purpose of the dust collection section 31 is to collect dust, and the dust suction section 32 is used to extract the collected dust. After the airflow enters the dust collection section 31, it can partially or mostly flow out from the outlet after dust collection. Alternatively, the outlet of the dust collection section 31 can be connected to the dust suction section 32. All or most of the airflow entering the dust collection section 31 is sucked away along with the dust. This does not affect the purpose of dust collection in the chamber 1a of this solution.

[0073] It is understandable that by directly connecting the dust suction unit 32 to the outlet of the dust collection unit 31, all or most of the airflow entering the dust collection unit 31 is sucked away by the dust suction unit 32. This is equivalent to sucking away a portion of the airflow participating in combustion in the chamber 1a, thereby removing the particulate matter generated after combustion in the chamber 1a. The dust collection is more thorough. Since the airflow sucked out has a high temperature and the combustion may not be complete, it can be sucked to the outside of the chamber 1a for dust removal before re-entering the chamber 1a of the furnace body 1 to participate in combustion. However, for the scheme that does not connect to the outlet but sets an exhaust outlet to connect with the dust suction unit 32, more dust and a portion of the airflow are sucked away. They can be directly sucked to the outside for dust removal and collection, or they can be dusted outside the chamber 1a and then re-enter the chamber 1a of the furnace body 1 to participate in combustion.

[0074] like Figure 7 As shown, the vacuuming unit 32 also includes connecting pipes 33 located at both ends of the vacuuming channel. One end of the connecting pipe 33 is connected to or integrally formed with the vacuuming pipe and is connected to the vacuuming pipe. Figure 7 The black arrow in the middle indicates the direction of the suction airflow. At this time, the connecting pipe 33 at one end is also part of the dust suction path, specifically the right end, while the connecting pipe 33 at the other end can be closed. However, it is clear that both connecting pipes 33 are connected to the exhaust fan 8, which is actually possible.

[0075] Please continue to refer to this. Figure 1 The regenerative incinerator in this embodiment also includes a waste heat recovery device 6. The dust suction unit 32 sucks out the dust-laden airflow, and the sucked-out airflow can enter the waste heat recovery device 6. The dust-laden airflow has a very high temperature, and the waste heat recovery device 6 can recover heat and make full use of energy. At the same time, it can greatly reduce the temperature of the dust-laden airflow, which is beneficial for the subsequent filtration and dust removal components 7 to filter out the dust in the airflow.

[0076] like Figure 9 As shown, Figure 9 for Figure 1A schematic diagram of the waste heat recovery device 6. The waste heat recovery device 6 may include multiple heat exchange tubes 61. The dust-laden airflow absorbed by the dust suction unit 32 can enter the heat exchange tubes 61 and exchange heat with the outside of the heat exchange tubes 61. The waste heat recovery device 6 can be installed outside the furnace body 1 for heating other components or media, or it can be installed inside the internal chamber 1a.

[0077] Figure 1 In this configuration, the waste heat recovery device 6 is specifically installed inside the chamber 1a and located below the heat storage body 2 at the air inlet. In this way, when the flue gas enters the chamber 1a but has not yet entered the heat storage body 2, it can exchange heat with the high-temperature airflow flowing inside the waste heat recovery device 6 and thus be heated. After being heated, the flue gas enters the heat storage body 2 and is heated again, so that it can be heated more efficiently and preheated to the required temperature as soon as possible to fully participate in combustion. To a certain extent, it can also save the amount of heat storage body 2 used.

[0078] In this embodiment, the waste heat recovery device 6 is located below the heat storage body 2 and is mainly used to preheat the flue gas that is about to enter the heat storage body 2, that is, it needs to correspond to the heat storage body 2 for air intake. However, as mentioned above, the airflow path in the chamber 1a in this embodiment may change. The airflow may flow through the heat storage body 2 after entering, or it may flow through the heat storage body 2 when exiting. That is, a certain heat storage body 2 does not necessarily correspond to air intake or air exhaust.

[0079] At this point, a second control valve 12 can be installed, such as... Figure 1 As shown, each heat storage body 2 is equipped with a waste heat recovery device 6 below it, and a second control valve 12 is provided on the connecting pipe between the dust collection device 3 and each waste heat recovery device 6. It can be linked with the first control valve 11 for control. When one of the first control valves 11 controls the airflow to enter the compartment where the corresponding heat storage body 2 is located, the second control valve 12 corresponding to the waste heat recovery device 6 below the heat storage body 2 in that compartment is opened, and the other two second control valves 12 are closed. This allows the dust-laden airflow sucked up by the dust collection device 3 to flow into the waste heat recovery device 6 below the heat storage body 2 at this time, instead of flowing into the other waste heat recovery devices 6, thereby completing the preheating of the incoming air.

[0080] Figure 1 In the middle, three sets of heat storage bodies 2 are set up, and three sets of collection devices 3 can be set up. The dust-laden airflow drawn by the three sets of collection devices 3 can be connected to a main pipe. The main pipe is connected to three waste heat recovery devices 6 through branch pipes. Each branch pipe is equipped with the aforementioned second control valve 12.

[0081] like Figure 1As shown, the outlets of multiple waste heat recovery devices 6 can be connected to the exhaust duct 9 via pipelines. An exhaust fan 8 is installed in the exhaust duct 9 to achieve suction, creating negative pressure in the dust collection section 32 connected to the exhaust duct 8. Additionally, the exhaust duct 9 is also connected to the flue 10. As mentioned earlier, the dust-laden airflow drawn by the dust collection section 32 can flow back into the chamber 1a to re-participate in combustion. At this point, a filter dust removal component 7 needs to be installed in the pipeline before the return to the flue 10 to remove dust from the drawn-out dust-laden airflow. The dust-removed airflow then re-enters the chamber 1a. The filter dust removal component 7 can be, for example, a filter screen, filter cotton, or other structure capable of filtering dust. Figure 1 In this process, the dust removal and filtration component 7 is located between the waste heat recovery device 6 and the induced draft pipe 9, so that dust removal and filtration can be achieved before entering the induced draft fan 8, which helps to prevent dust in the dust-laden airflow from affecting the service life of the induced draft fan 8.

[0082] Please continue to refer to this. Figure 1 In this embodiment, the chamber 1a of the furnace body 1 is separated from the external environment by the thermal insulation layer 5, avoiding heat loss of the high-temperature flue gas in the chamber 1a. The aforementioned second control valve 12 can be installed in the external environment for easy operation and maintenance. At this time, the flow pipeline of the dust-laden airflow after being sucked by the dust collection device 3 can be buried in the thermal insulation layer 5, which can reduce the thermal insulation design of this part of the pipeline and reduce the occupation of the pipeline in the chamber 1a.

[0083] Please continue reading. Figure 10-12 , Figure 10 for Figure 3 Sectional view along axis AA; Figure 11 for Figure 4 BB-direction sectional view; Figure 12 for Figure 5 CC-direction sectional view.

[0084] A set of suction section 32 and dust collection section 31 can be defined as a dust collection assembly. In this embodiment, the dust collection device 3 may include at least two rows of dust collection assemblies. The multiple rows of dust collection assemblies are distributed along the height direction of the furnace body 1, which can be defined as the first direction, i.e. Figure 10-12 The vertical direction shown is also the airflow direction above the heat storage body 2 in chamber 1a. Each row of dust collection components includes multiple sets of suction sections 32 and dust collection sections 31, which are distributed horizontally and perpendicular to the first direction, defined as the second direction. Figure 10-12 The left and right directions shown represent the width of furnace body 1, perpendicular to the distribution direction of heat storage body 2. For example... Figure 10As shown, adjacent rows of dust collection components can be staggered in the second direction. This allows airflow that does not enter the adjacent two sets of dust collection components in one row to enter the next row of dust collection components between the two sets of dust collection components in that row for dust collection. This enables the two rows of dust collection components to collect dust more effectively and improves dust collection efficiency. It can be seen that multiple rows of dust collection components can also be set in the height direction of the furnace body 1.

[0085] Figure 10 In the middle, the airflow is downward, and the cover 34 rotates to the bottom of the dust collection section 31, so that the airflow can enter the dust collection section 31 to collect dust. At the same time, the lower cover 34 can increase the turbulence of the airflow and promote the aggregation of particulate dust. Figure 11-12 In the middle, the airflow is upward, and the cover 34 rotates to the top of the dust collection section 31 to seal the inlet. The dust collection section 31 does not collect dust, and also prevents the airflow from blowing away the dust inside the dust collection section 31.

[0086] Let's look again. Figure 1 When the dust collection device 3 includes multiple dust collection components, a manifold box 4 can be provided. The manifold box 4 is also located inside the chamber 1a, or it can be located inside the insulation layer 5 to avoid occupying the space of the chamber 1a. In this embodiment, only the manifold box 4, the dust collection device 3, and the waste heat recovery device 6 can be located inside the chamber 1a. The dust-laden airflow drawn by the suction section 32 of each dust collection component is connected to the manifold box 4. For example, the connecting pipe 33 mentioned above can be connected to the manifold box 4. In this way, it can be transported to the outside of the chamber 1a through the manifold box 4. The connecting pipe can be directly connected to the manifold box 4, which simplifies the arrangement of the pipes.

[0087] The dust collection device 3 in the above embodiment is installed in a regenerative incinerator. It can be seen that the dust collection device 3 can also be used in other dust collection environments. As long as there is a change in the airflow direction in the occasion where dust collection is required, the dust collection device provided in this embodiment can be applied.

[0088] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A dust collection device, characterized in that, The dust collection device includes a dust collection section and a suction section. The dust collection section has an inlet for airflow to enter, and the suction section is connected to the dust collection section for sucking up the dust collected by the dust collection section. The dust collection device also includes a rotatable cover. When the airflow is towards or away from the inlet, the cover can rotate under the action of the airflow to move away from or seal the inlet accordingly. The cover includes a connecting part and a cover part. The cover part is used to seal the inlet. One end of the connecting part is hinged to the suction section, and the other end is connected to the cover part. The dust collection section includes two dust collection plates arranged at an angle, the two dust collection plates forming a flared end and a constricted end, the flared end forming the inlet; The constricted end forms the outlet of the dust collection section; the constricted end is connected to the dust suction section, or the dust collection section further includes a discharge outlet, which is connected to the dust suction section.

2. The dust collection device according to claim 1, characterized in that, The dust collection unit includes a dust collection pipe, and one side of the dust collection pipe has an opening extending along its length. The opening is connected to the constricted end to connect the dust collection unit and the dust collection unit.

3. The dust collection device according to claim 1, characterized in that, The dust collection device is positioned above the heat storage body of the regenerative incinerator; the length direction of the dust collection plate is parallel to the horizontal direction, with the flared end facing upwards and the constricted end facing downwards.

4. The dust collection device according to claim 1, characterized in that, The two dust collection plates are arranged opposite each other, and the dust collection surface is provided with multiple hanging plates.

5. A regenerative thermal oxidizer, characterized in that, The furnace includes a furnace body, and a heat storage body is provided in the chamber of the furnace body. The chamber is also provided with a dust collection device as described in any one of claims 1-4.

6. The regenerative incinerator according to claim 5, characterized in that, The chamber is provided with a vent that connects to the chamber, and airflow can enter the chamber through the vent; the regenerative incinerator also includes a pipeline that connects the dust collection unit and the vent, and the pipeline is provided with a dust removal filter.

7. The regenerative incinerator according to claim 5, characterized in that, The regenerative incinerator also includes a waste heat recovery device, the dust collection section is connected to the waste heat recovery device, and the waste heat recovery device is located in the chamber and is positioned below the heat storage body corresponding to the airflow entering.

8. The regenerative incinerator according to claim 7, characterized in that, Also includes: Multiple heat storage elements and corresponding multiple vents; Multiple first control valves, each corresponding to one of the multiple vents, are used to control the flow of air into or out of the vents; The waste heat recovery device corresponding to each of the multiple heat storage bodies; Multiple second control valves are provided, each second control valve being located between one of the waste heat recovery devices and the dust collection device. The first control valve controls one of the vents to allow airflow, and then controls the second control valve to connect the waste heat recovery device and the dust collection device below the heat storage body corresponding to the vent that allows airflow, while the remaining waste heat recovery devices are disconnected from the dust collection device.

9. The regenerative incinerator according to any one of claims 5-8, characterized in that, The dust collection section and the dust suction section form a dust collection assembly, and the dust collection device includes multiple rows of the dust collection assembly.

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