A built-in ash hopper for cleaning ash and decoking and heat preservation conveying device

Abstract

The present invention discloses a heat-insulating conveying device with a built-in ash hopper for cleaning ash accumulation and removing coke, which belongs to the field of high-temperature dust removal technology. It is used to solve the problem that the gears of the scraping system of the existing electrostatic precipitator are easily stuck and unstable in operation due to high temperature, and further, the conveyor cannot be kept warm, resulting in temperature loss in the high-temperature dust conveying process. The device includes: ash collecting guide plates, two groups of which are arranged at the bottom of the high-temperature electrostatic precipitator, for collecting high-temperature dust from the high-temperature electrostatic precipitator; an ash cleaning system, which is arranged on the ash collecting guide plates, for removing high-temperature dust on the ash collecting guide plates; a buried scraper conveyor, which is arranged below the high-temperature electrostatic precipitator, for conveying the high-temperature dust to the discharge port.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature dust removal, and more specifically relates to a heat-insulating conveying device with a built-in ash hopper for cleaning ash accumulation and removing coking. Background Art

[0002] The cylindrical horizontal electrostatic precipitator collects ash in the flue gas through the anode and cathode. The ash falls on the lower arc plate of the cylindrical horizontal electrostatic precipitator and accumulates in the lower part of the cylindrical horizontal electrostatic precipitator. Due to the long-term accumulation, the ash has poor self-flow ability. If there is no external force to remove the accumulated ash, the height of the ash accumulation will continue to increase after the cylindrical horizontal electrostatic precipitator has been running for a period of time, causing the anode and cathode to overlap, resulting in failure of the cylindrical horizontal electrostatic precipitator.

[0003] The existing cylindrical horizontal electrostatic precipitator is equipped with an ash scraping system that swings along the lower arc surface. When the ash scraping system swings along the lower arc surface, the accumulated ash can be brought to the ash discharge port at the bottom of the cylindrical horizontal electrostatic precipitator. Then the ash can be discharged from the cylindrical horizontal electrostatic precipitator along with the ash pulling device, ensuring the long-term and stable operation of the cylindrical horizontal electrostatic precipitator.

[0004] In actual applications, when the scraper system swings inside the equipment, it drives the high-temperature dust to move to the dust outlet and enter the buried scraper conveyor. Since the scraper system works in a cylindrical horizontal electrostatic precipitator and the temperature inside the cylindrical horizontal electrostatic precipitator is relatively high, under high-temperature conditions, the shell and scraper mechanism of the scraper system are prone to expansion, causing the moving gears to get stuck, resulting in frequent failures of the scraper system. Furthermore, the existing high-temperature buried scraper conveyors use high-temperature resistant materials, and the equipment shell is made of a water-cooled interlayer, and the equipment is cooled by circulating water to achieve the purpose of conveying high-temperature materials. Alternatively, the upper part of the buried scraper conveyor shell is open, fully in contact with the external environment, and fully dissipates heat to achieve the purpose of conveying high-temperature materials.

[0005] In summary, the existing electrostatic precipitator is prone to cause the scraping system gears to get stuck and work unstably due to high temperature. Furthermore, the conveyor cannot be kept warm, resulting in temperature loss during the high-temperature dust transportation process. Summary of the invention

[0006] The embodiment of the present invention provides a built-in ash hopper for cleaning ash and de-coking and heat-insulating conveying device, which is used to solve the problem that the gears of the scraping system of the existing electrostatic precipitator are easily stuck and the operation is unstable due to high temperature. Furthermore, the conveyor cannot be insulated, resulting in temperature loss during the high-temperature dust conveying process.

[0007] The embodiment of the present invention provides a built-in ash hopper for cleaning ash accumulation, removing coke and heat preservation and conveying, comprising:

[0008] Ash collecting guide plates, two groups of which are arranged at the bottom of the high-temperature electrostatic precipitator to collect high-temperature dust from the high-temperature electrostatic precipitator;

[0009] An ash cleaning system is provided on the ash collecting guide plate and is used to remove high-temperature dust on the ash collecting guide plate;

[0010] The buried scraper conveyor is arranged below the high-temperature electrostatic precipitator and is used to convey the high-temperature dust to the discharge port; wherein the buried scraper conveyor shell included in the buried scraper conveyor is a double-layer structure, and a heat-insulating material is arranged between the double-layer structure.

[0011] Preferably, the ash collecting and guide plate comprises at least a head ash sliding plate and a tail ash sliding plate, the lower part of the head ash sliding plate and the upper part of the tail ash sliding plate are both connected to the shell, and the upper part of the head ash sliding plate is in contact with the lower part of the tail ash sliding plate;

[0012] The front end ash sliding plate and the rear end ash sliding plate are both inclined at an angle of 20°-70° with the horizontal plane.

[0013] Preferably, the ash collecting and guide plate further comprises at least one intermediate ash sliding plate, both ends of which are in contact with the first end ash sliding plate and the terminal ash sliding plate respectively;

[0014] The front end ash sliding board is inclined at an angle of 20° to the horizontal plane, and the rear end ash sliding board is inclined at an angle of at least 20° to the horizontal plane; or

[0015] The front end ash sliding board is inclined at an angle of 40° to the horizontal plane, and the rear end ash sliding board is inclined at an angle of at least 40° to the horizontal plane; or

[0016] The front end ash sliding plate is inclined at an angle of 70° to the horizontal plane, and the rear end ash sliding plate is inclined at an angle of at least 70° to the horizontal plane.

[0017] Preferably, a first insulation layer is provided between each group of the ash collecting guide plates and the high-temperature electrostatic precipitator housing, and a second insulation layer is provided on the high-temperature electrostatic precipitator housing;

[0018] The head end and the tail end of each group of the ash collecting guide plates are in sealing contact with the high-temperature electrostatic precipitator shell; the two groups of the ash collecting guide plates and the high-temperature electrostatic precipitator shell form a cavity.

[0019] Preferably, the cleaning system comprises:

[0020] A power gas inlet, which is arranged outside the high-temperature electrostatic precipitator and connected to the power gas main pipeline, provides pressurized, warm and oxygen-free gas into the high-temperature electrostatic precipitator;

[0021] An electromagnetic control valve, which is arranged on the power gas main pipeline and is located between the power gas inlet and the high-temperature electrostatic precipitator;

[0022] A power gas main pipeline, one end of which is located outside the high-temperature electrostatic precipitator and the other end of which extends into the high-temperature electrostatic precipitator;

[0023] The dust cleaning device is arranged on the dust collecting guide plate and connected to the power gas main pipeline, and is used for removing the high-temperature dust accumulated on the dust collecting guide plate.

[0024] Preferably, it also includes a plurality of power gas branch pipes;

[0025] The outlet of the power gas main pipeline is vertically connected to a plurality of power gas branch pipes, and the interval between two adjacent power gas branch pipes is 0.2 meters to 2 meters, and a dust cleaning device is provided at the outlet of each power gas branch pipe;

[0026] When multiple power gas branch pipes are located on the middle ash sliding board, each power gas branch pipe and the ash cleaning device have the same inclination angle as the middle ash sliding board; or when the power gas branch pipes are located on the first end ash sliding board, each power gas branch pipe and the ash cleaning device have the same inclination angle as the first end ash sliding board.

[0027] Preferably, the scraper conveyor housing comprises an inner shell and an outer shell, and a heat-insulating material is arranged between the inner shell and the outer shell, and the feed port is arranged at the top of the scraper conveyor housing to receive high-temperature dust from the high-temperature electrostatic precipitator, wherein the temperature of the high-temperature dust is between 350°C and 600°C;

[0028] The buried scraper conveyor also includes:

[0029] A feed port, which is arranged at the top of the scraper conveyor housing and is used to receive high-temperature dust from the high-temperature electrostatic precipitator, wherein the temperature of the high-temperature dust is between 350°C and 600°C;

[0030] A first shaft, a first gear is arranged on a first end outside the scraper conveyor, and two second gears are arranged on a middle section inside the scraper conveyor;

[0031] A second chain, wherein two of the second chains are respectively arranged on the second gear and connected to two third gears located on the other side of the scraper conveyor;

[0032] A scraper, which is arranged on the two chains, and is used to scrape the high-temperature dust arranged on the bottom plate of the scraper conveyor to the discharge port under the drive of the chains;

[0033] The buried scraper conveyor shell comprises an inner shell and an outer shell, and a heat-insulating material is arranged between the inner shell and the outer shell.

[0034] Preferably, the buried scraper conveyor housing comprises a plurality of sections;

[0035] The head end housing is used to set the first shaft, the tail end housing is used to set the third gear and the second shaft, and the middle section housing is used to set the feed port and the discharge port;

[0036] Or the head end housing is used to set the first shaft and the feed port, and the tail end housing is used to set the third gear, the second shaft and the feed port;

[0037] Or the head end housing is used to set the first shaft and the feed port, and the tail end housing is used to set the third gear, the second shaft and the feed port;

[0038] Among them, an expansion gap is set between the head end shell and the tail end shell, an expansion gap is set between the head end shell and the middle section shell, an expansion gap is set between the middle section shell and the middle section shell, and an expansion gap is set between the middle section shell and the tail end shell.

[0039] Preferably, the upper surface of the inner shell is located directly above the two chains, and the ceramic fiber layer and the outer shell are arranged thereon;

[0040] The lower surface of the inner shell is in contact with the lower surface of the bottom plate of the scraper conveyor, and wear-resistant castables and the outer shell are arranged below and on both sides thereof;

[0041] Ceramic fiber layers and the outer shell are arranged on both sides of the inner shell, wherein the thickness of the ceramic fiber layer is 300 mm, and the thickness of the wear-resistant castable is 300 mm.

[0042] Preferably, the first shaft is arranged to penetrate the housing of the scraper conveyor, and the second end thereof is located outside the scraper conveyor;

[0043] The first end of the first shaft is disposed on the housing of the scraper conveyor through a bearing; the second end of the first shaft is disposed on the housing of the scraper conveyor through a bearing;

[0044] A filler is arranged between the bearing and the housing of the buried scraper conveyor.

[0045] Preferably, a protective cover is provided outside the bearing and the scraper conveyor housing;

[0046] The protective cover and the shell of the buried scraper conveyor are sealed with nitrogen.

[0047] An embodiment of the present invention provides a built-in ash hopper for cleaning ash accumulation and removing coke and is insulated conveying device, comprising: ash collecting guide plates, two groups of which are arranged at the bottom of a high-temperature electrostatic precipitator, for collecting high-temperature dust from the high-temperature electrostatic precipitator; an ash cleaning system, which is arranged on the ash collecting guide plates, for removing the high-temperature dust on the ash collecting guide plates; a buried scraper conveyor, which is arranged below the high-temperature electrostatic precipitator and is used to convey the high-temperature dust to a discharge port; wherein the buried scraper conveyor shell included in the buried scraper conveyor is a double-layer structure, and insulation material is arranged between the double-layer structure. An ash collecting guide plate is arranged in the high-temperature electrostatic precipitator to avoid the problem of the moving gears included in the scraping system being stuck due to high temperature; the ash collecting guide plate is arranged in the high-temperature electrostatic precipitator, has a simple structure, and can freely expand and contract at high temperature, avoiding the problem of the precipitator not being able to work normally due to high-temperature expansion; furthermore, the ash cleaning system arranged on the ash collecting guide plate can accelerate the recovery of the high-temperature dust accumulated on the ash collecting guide plate, avoiding the accumulation of high-temperature dust on the ash collecting guide plate; further, the buried scraper conveyor arranged under the high-temperature electrostatic precipitator has a double-layer structure for the high-temperature electrostatic precipitator shell, and thermal insulation material is arranged between the double-layer structure, avoiding the problem of easy temperature loss during the existing high-temperature dust transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A schematic structural diagram of a built-in ash hopper for cleaning ash and de-coking heat preservation and conveying device provided in an embodiment of the present invention;

[0050] Figure 2 A schematic diagram of the structure of an ash collecting guide plate provided in an embodiment of the present invention;

[0051] Figure 3 A schematic diagram of the installation of a power gas branch pipe provided in an embodiment of the present invention;

[0052] Figure 4 A schematic diagram of the structure of a buried scraper conveyor provided in an embodiment of the present invention;

[0053] Figure 5 A schematic diagram of a partial structure of a buried scraper conveyor provided in an embodiment of the present invention;

[0054] Figure 6 A schematic cross-sectional view of a buried scraper conveyor provided in an embodiment of the present invention;

[0055] Among them, there are ash collecting guide plate 1, buried scraper conveyor 2, high-temperature electrostatic precipitator shell 3, cleaning system 4, angle steel support 1-2, first shaft 2-1, first gear 2-2, motor 2-3, second gear 2-4, buried scraper conveyor shell 2-5, protective cover 2-6, scraper 2-7, inner shell 2-8, outer shell 2-9, ceramic fiber layer 2-10, wear-resistant castable 2-11, guide rail 2-12, limit device 2-13, feed port 2-14, discharge port 2-15, second insulation layer 3-1, first insulation layer 3-2, power gas inlet 4-1, power gas main pipeline 4-2, cleaning device 4-3, electromagnetic control valve 4-4, power gas branch pipe 4-5. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Figure 1 A schematic structural diagram of a built-in ash hopper for cleaning ash and de-coking heat preservation and conveying device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of an ash collecting guide plate provided in an embodiment of the present invention; Figure 3 A schematic diagram of the installation of the power gas branch pipe 4-5 provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a buried scraper conveyor provided in an embodiment of the present invention; Figure 5 A schematic diagram of a partial structure of a buried scraper conveyor provided in an embodiment of the present invention; Figure 6 A schematic cross-sectional view of a buried scraper conveyor provided in an embodiment of the present invention; Figure 1 to Figure 6 , a built-in ash hopper ash cleaning, de-coking and heat-insulating conveying device provided in an embodiment of the present invention is introduced in detail.

[0058] like Figure 1 As shown, the built-in ash hopper ash cleaning, de-coking and heat preservation conveying device mainly includes an ash collecting guide plate 1, an ash cleaning system and an embedded scraper conveyor 2. Specifically, two groups of ash collecting guide plates 1 are arranged at the bottom of the high-temperature electrostatic precipitator to collect high-temperature dust from the high-temperature electrostatic precipitator, and an ash discharge port is arranged at one end of the bottom of the ash collecting guide plate 1 close to the high-temperature electrostatic precipitator, and an embedded scraper conveyor 2 is arranged below the ash discharge port. In actual application, the ash collecting guide plate 1 has a relatively simple structure. It is built-in at the bottom of the high-temperature electrostatic precipitator and can be freely expanded and contracted at high temperatures, avoiding the problem of the precipitator stopping working due to high-temperature expansion in the prior art.

[0059] Furthermore, the ash collecting guide plate 1 is arranged in the high temperature electrostatic precipitator for collecting high temperature dust. However, due to factors such as the temperature change of the high temperature electrostatic precipitator, the change of the properties of the high temperature dust or the change of the gas state, the ability of the high temperature dust to fall along the ash sliding plate will be reduced. For example, the temperature in the equipment during coal pyrolysis is 450-600°C, the tar in the pyrolysis gas is gaseous tar, and the high temperature dust has low viscosity. However, after the temperature is lowered, the tar condenses into a liquid state and forms an asphalt-like substance after mixing with the high temperature dust, the viscosity increases, and the ash sliding plate is prone to ash accumulation and coking. It is difficult to collect high temperature dust by gravity alone. Preferably, at least one cleaning system 4 is arranged above each group of ash collecting guide plates 1. Through the cleaning system 4, the cleaning system 4 is resistant to high temperature, and the acting gas can be directly introduced into the high-temperature electrostatic precipitator, which can accelerate the recovery of the high-temperature dust accumulated on the ash collecting guide plates 1 and avoid the high-temperature dust accumulated on the ash collecting guide plates 1. When the tar in the pyrolysis gas becomes liquid due to temperature change, it mixes with the high-temperature dust and accumulates and cokes on the ash collecting guide plates 1. It is difficult to collect the high-temperature dust by relying solely on gravity.

[0060] In the embodiment of the present invention, the high-temperature dust of the ash collecting guide plate 1 enters the buried scraper conveyor 2 through the ash discharge port. In order to avoid the problem of temperature loss after the high-temperature dust enters the buried scraper conveyor 2, the buried scraper conveyor 2 provided in the embodiment of the present invention includes a buried scraper conveyor housing 2-5 of a double-layer structure, and a heat-insulating material is arranged between the double-layer structures. The heat-insulating material arranged between the double-layer structures can be used to insulate the high-temperature dust entering through the discharge port 2-15, ensuring that no temperature loss occurs during transportation.

[0061] It should be noted that the ash collecting guide plate 1 provided in the embodiment of the present invention is arranged at the bottom of the high temperature electrostatic precipitator, and a closed cavity is formed between the ash collecting guide plate 1 and the high temperature electrostatic precipitator housing 3. Because the high temperature electrostatic precipitator contains flammable and explosive gas, the gas in the high temperature electrostatic precipitator needs to be replaced before and after operation, so the ash collecting guide plate 1 cannot be made into a sealed structure.

[0062] For example, Figure 2As shown, in the embodiment of the present invention, each group of ash collecting and guiding plates 1 at least includes a head end ash chute plate and a terminal ash chute plate. Specifically, the lower part of the head end ash chute plate and the upper part of the terminal ash chute plate are both connected to the high temperature electrostatic precipitator housing 3, and the upper part of the head end ash chute plate is in contact with the lower part of the terminal ash chute plate. It should be noted that the lower part of the head end ash chute plate is connected to the high temperature electrostatic precipitator housing 3, and the upper part of the terminal ash chute plate is connected to the high temperature electrostatic precipitator housing 3. The connection here can be a welding connection or a fixed connection. In the embodiment of the present invention, the specific method of connecting with the high temperature electrostatic precipitator housing 3 is not limited. Furthermore, the upper part of the head end ash chute plate is in contact with the lower part of the terminal ash chute plate. The contact here can be that the end face of the upper part is in contact with the end face of the lower part, the lower part of the terminal ash chute plate can be overlapped above the upper part of the head end ash chute plate, or the lower part of the terminal ash chute plate can be built above the upper part of the head end ash chute plate through a support rod. In the embodiment of the present invention, the specific method of contact is not limited.

[0063] For example, Figure 1 As shown, in the embodiment of the present invention, each group of ash collecting and guiding plates 1 at least includes a head end ash chute plate and a terminal ash chute plate. Specifically, the lower part of the head end ash chute plate and the upper part of the terminal ash chute plate are both connected to the high temperature electrostatic precipitator housing 3, and the upper part of the head end ash chute plate is in contact with the lower part of the terminal ash chute plate. It should be noted that the lower part of the head end ash chute plate is connected to the high temperature electrostatic precipitator housing 3, and the upper part of the terminal ash chute plate is connected to the high temperature electrostatic precipitator housing 3. The connection here can be a welding connection or a fixed connection. In the embodiment of the present invention, the specific method of connecting with the high temperature electrostatic precipitator housing 3 is not limited. Furthermore, the upper part of the head end ash chute plate is in contact with the lower part of the terminal ash chute plate. The contact here can be that the end face of the upper part is in contact with the end face of the lower part, the lower part of the terminal ash chute plate can be overlapped above the upper part of the head end ash chute plate, or the lower part of the terminal ash chute plate can be built above the upper part of the head end ash chute plate through a support rod. In the embodiment of the present invention, the specific method of contact is not limited.

[0064] In practical applications, the inclination angle between the first end ash chute and the horizontal plane can be 20°-70°; correspondingly, the inclination angle between the terminal ash chute and the horizontal plane can also be 20°-70°. Since the ash collecting guide plate 1 is arranged at the bottom of the high-temperature electrostatic precipitator, in practical applications, the distance between the lower part of the first end ash chute and the outlet of the high-temperature electrostatic precipitator is smaller than the distance between the upper part of the terminal ash chute and the outlet of the high-temperature electrostatic precipitator. In order to realize the function of the ash collecting guide plate 1, that is, to collect high-temperature dust from the high-temperature electrostatic precipitator, preferably, the inclination angle between the terminal ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane.

[0065] Specifically, when the inclination angle between the first end ash chute and the horizontal plane is 20°, the inclination angle between the last end ash chute and the horizontal plane is at least 20°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 20°, 25°, 30°, 35°, or 40°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 20°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 20° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 20° and 70°, respectively.

[0066] For example, when the inclination angle between the first end ash chute and the horizontal plane is 25°, the inclination angle between the last end ash chute and the horizontal plane is at least 25°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 25°, 30°, 35°, 40°, or 45°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 25°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 25° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 25° or 70°, respectively.

[0067] For example, when the inclination angle between the first end ash chute and the horizontal plane is 30°, the inclination angle between the last end ash chute and the horizontal plane is at least 30°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 30°, 35°, 40°, 45°, or 50°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 30°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 30° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 30° and 70°, respectively.

[0068] For example, when the inclination angle between the first end ash chute and the horizontal plane is 35°, the inclination angle between the last end ash chute and the horizontal plane is at least 35°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 35°, 40°, 45°, 50°, or 55°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 35°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 35° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 35° or 70°, respectively.

[0069] For example, when the inclination angle between the first end ash chute and the horizontal plane is 40°, the inclination angle between the last end ash chute and the horizontal plane is at least 40°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 40°, 45°, 55°, 60°, or 65°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 40°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 40° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 40° and 70°, respectively.

[0070] For example, when the inclination angle between the first end ash chute and the horizontal plane is 45°, the inclination angle between the last end ash chute and the horizontal plane is at least 45°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 45°, 50°, 55°, 60°, or 65°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 45°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 45° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 45° or 70°, respectively.

[0071] For example, when the inclination angle between the first end ash chute and the horizontal plane is 50°, the inclination angle between the last end ash chute and the horizontal plane is at least 50°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 50°, 55°, 60°, 65°, or 70°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 50°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 50° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 50° or 70°, respectively.

[0072] For example, when the inclination angle between the first end ash chute and the horizontal plane is 55°, the inclination angle between the last end ash chute and the horizontal plane is at least 55°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 55°, 60°, 65°, or 70°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 55°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 55° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 55° or 70°, respectively.

[0073] For example, when the inclination angle between the first end ash chute and the horizontal plane is 60°, the inclination angle between the last end ash chute and the horizontal plane is at least 60°. For example, the inclination angle between the last end ash chute and the horizontal plane can be 60°, 62°, 65°, 68°, or 70°. In this embodiment, when the inclination angle between the first end ash chute and the horizontal plane is 40°, it is sufficient to ensure that the inclination angle between the last end ash chute and the horizontal plane is greater than or equal to the inclination angle between the first end ash chute and the horizontal plane. The inclination angle between the last end ash chute and the horizontal plane can be between 60° and 70°. At the same time, the inclination angle between the last end ash chute and the horizontal plane can also be 60° or 70°, respectively.

[0074] In the above embodiment, when the ash collecting guide plate 1 is composed of a head end ash chute plate and a tail end ash chute plate, the upper portion of the head end ash chute plate is in contact with the lower portion of the tail end ash chute plate, and the contacting head end ash chute plate and tail end ash chute plate are not welded, and the ash collecting guide plate 1 composed of the head end ash chute plate and the tail end ash chute plate can freely expand and contract at high temperatures, thus solving the problem of high temperature expansion; furthermore, because high temperature gas working conditions are prone to explosions, the purpose of the overlap between the ash collecting guide plates 1 is to release the local impact force in the explosion so as not to cause destructive impact on the ash chute surface.

[0075] Furthermore, the ash collecting and guide plate 1 also includes at least one middle ash chute plate, and two ends of the middle ash chute plate are in contact with the head end ash chute plate and the tail end ash chute plate respectively.

[0076] Specifically, one way: Figure 1 As shown, the lower part of the first end ash chute plate is connected to the high-temperature electrostatic precipitator shell 3, the upper part of the first end ash chute plate contacts the lower part of the middle ash chute plate, the upper part of the middle ash chute plate contacts the lower part of the terminal ash chute plate, and the upper part of the terminal ash chute plate is connected to the high-temperature electrostatic precipitator shell 3.

[0077] Another method also includes supporting 1-2 with angle steel, such as Figure 2 As shown, the lower part of the first end ash chute plate is connected to the high-temperature electrostatic precipitator shell 3, and the upper part of the first end ash chute plate is arranged on the side angle steel with angle steel support 1-2, that is, the first end ash chute plate is arranged on the side wall inside the high-temperature electrostatic precipitator through the angle steel support 1-2, and is in contact with the high-temperature electrostatic precipitator shell 3; the upper part of the terminal ash chute plate is connected to the high-temperature electrostatic precipitator shell 3, and the lower part of the terminal ash chute plate is arranged on the angle steel support 1-2, that is, the terminal ash chute plate is arranged on the side wall inside the high-temperature electrostatic precipitator through the angle steel support 1-2, and is in contact with the high-temperature electrostatic precipitator shell 3; the upper part of the middle ash chute plate is arranged on the side angle steel with angle steel support 1-2, and is welded to the side angle steel, and the lower part of the middle ash chute plate is arranged on the angle steel support 1-2.

[0078] In the above embodiment, when the ash collecting guide plate 1 is composed of a head ash chute plate, a terminal ash chute plate and at least one intermediate ash chute plate, since the upper part of the intermediate ash chute plate is arranged on the side angle steel with angle steel support 1-2, and the lower part of the terminal ash chute plate is arranged on the angle steel support 1-2, a gap is left between the upper part of the intermediate ash chute plate and the lower part of the terminal ash chute plate; the upper part of the head ash chute plate is arranged on the side angle steel with angle steel support 1-2, and the lower part of the intermediate ash chute plate is arranged on the angle steel support 1-2, therefore, a gap is left between the upper part of the head ash chute plate and the lower part of the intermediate ash chute plate. Based on this, the ash collecting guide plate 1 composed of the head ash chute plate, the terminal ash chute plate and at least one intermediate ash chute plate can freely expand and contract at high temperature, solving the problem of high temperature expansion; furthermore, because high temperature gas conditions are prone to explosions, the role of the overlap between the ash collecting guide plates 1 is to release local impact force in the explosion so as not to cause destructive impact on the ash chute surface.

[0079] For example, the ash collecting guide plate 1 is arranged at the bottom of the high-temperature electrostatic precipitator. Due to the working conditions of the high-temperature electrostatic precipitator, in order to avoid heat loss, preferably, a first insulation layer 3-2 is arranged on the high-temperature electrostatic precipitator shell 3; further, in order to prevent the high-temperature dust in the high-temperature electrostatic precipitator from falling into the cavity between the high-temperature electrostatic precipitator shell 3 through the gap of the ash sliding plate, and the ash is difficult to remove for a long time, preferably, a second insulation layer 3-1 is also arranged between the high-temperature electrostatic precipitator shell 3 and the ash collecting guide plate 1, and the second insulation layer 3-1 is a lightweight insulation material.

[0080] Because the ash collecting guide plate 1 is arranged inside the high-temperature electrostatic precipitator shell 3, in actual application, the ash collecting guide plate 1 composed of the head ash chute plate and the end ash chute plate has different inclination angles with the horizontal plane, so the cavities formed by the ash collecting guide plate 1 composed of the head ash chute plate and the end ash chute plate and the high-temperature electrostatic precipitator shell 3 will be different in size. For example, if the formed cavity is large, the available space in the high-temperature electrostatic precipitator will be smaller; correspondingly, if the formed cavity is small, the available space in the high-temperature electrostatic precipitator will be larger. In order to allow the high-temperature dust on the ash collecting guide plate 1 to fall smoothly, in general, the setting angle of the ash collecting guide plate 1 is increased as much as possible, but the built-in ash collecting guide plate 1 is used to occupy as little space as possible in the high-temperature electrostatic precipitator, and the angle between the ash chute plate and the horizontal plane is as small as possible on the basis of meeting the use requirements and smooth ash falling.

[0081] For example, Figure 1 As shown, the dust cleaning system 4 includes a power gas inlet 4-1, an electromagnetic control valve 4-4, a power gas main pipeline 4-2 and a dust cleaning device 4-3. Specifically, the power gas inlet 4-1 is arranged outside the high-temperature electrostatic precipitator, connected to the power gas main pipeline 4-2, and provides pressurized, warm and oxygen-free gas to the high-temperature electrostatic precipitator; the electromagnetic control valve 4-4 is arranged on the power gas main pipeline 4-2, and is located between the power gas inlet 4-1 and the high-temperature electrostatic precipitator; one end of the power gas main pipeline 4-2 is located outside the high-temperature electrostatic precipitator, and the other end extends into the high-temperature electrostatic precipitator; the dust cleaning device 4-3 is located on the ash collecting guide plate 1, connected to the power gas main pipeline 4-2, and is used to remove the high-temperature dust accumulated on the ash collecting guide plate.

[0082] Specifically, the dust cleaning device 4-3 can be a sonic soot blower or a gas nozzle. When the dust cleaning device 4-3 is a sonic soot blower, it can convert pressurized, warm, oxygen-free gas into sound waves to vibrate the high-temperature dust accumulated on the dust collecting guide plate, thereby removing the high-temperature dust accumulated on the dust collecting guide plate; when the dust cleaning device 4-3 is a gas nozzle, it can blow pressurized, warm, oxygen-free gas to the high-temperature dust accumulated on the dust collecting guide plate, thereby removing the high-temperature dust accumulated on the dust collecting guide plate.

[0083] In practical applications, the above-mentioned pressurized, warm, oxygen-free gas can be heating steam or heated nitrogen. Since the interior of the high-temperature electrostatic precipitator is a flammable and explosive gas, the gas entering through the power gas inlet must not contain oxygen. When the dust cleaning device is a sonic soot blower, while it converts the pressurized, warm, oxygen-free gas into sound waves to vibrate the high-temperature dust accumulated on the ash collecting guide plate, there is also a part of the pressurized, warm, oxygen-free gas that is not converted into sound waves, which blows the high-temperature dust accumulated on the ash collecting guide plate through the dust cleaning device.

[0084] It should be noted that, since the cleaning system 4 transports the dust to the high-temperature electrostatic precipitator through the power gas main pipe 4-2, the power gas main pipe 4-2 is introduced downward from the top, and since the area of ​​each group of dust collecting guide plates 1 is relatively large, but the scope of action of the cleaning device 4-3 is limited, if a cleaning system 4 only includes one cleaning device 4-3, there will be a leakage area when it blows the high-temperature dust formed on the dust collecting guide plates 1. In order to solve the above problem, preferably, a power gas branch pipe 4-5 is also included.

[0085] In the embodiment of the present invention, a main power gas pipeline 4-2 is vertically connected to multiple power gas branch pipes 4-5, and each power gas branch pipe 4-5 is provided with a dust cleaning device 4-3. The above arrangement can solve the problem of leakage area on the dust collecting guide plate 1.

[0086] It should be noted that the power gas branch pipe 4-5 and the power gas main pipe 4-2 are both located on the ash collecting guide plate 1. When multiple power gas branch pipes 4-5 are located on the middle ash chute plate, each power gas branch pipe 4-5 and the above-mentioned ash cleaning device 2 are inclined at the same angle as the middle ash chute plate; when the power gas branch pipe 4-5 is located on the head end ash chute plate, each power gas branch pipe 4-5 and the ash cleaning device are inclined at the same angle as the head end ash chute plate.

[0087] Furthermore, the power gas branch pipe 4-5 is located on the ash collecting guide plate 1. When the ash cleaning device 4-3 connected to the power gas branch pipe 4-5 is a sonic soot blower, the straight-line distance between the sonic soot blower and the ash discharge port of the ash collecting guide plate 1 is between 5 and 7 meters.

[0088] Furthermore, since the sonic soot blower has an action range of 6-9m in front and a circumferential diameter of 2-3m, and the action range of the gas nozzle is relatively small compared to the action range of the sonic soot blower, if the soot cleaning device 4-3 installed on the power gas branch pipe 4-5 is a sonic soot blower, Figure 3As shown, a power gas branch pipe 4-5 is arranged at intervals of 2 meters on each power gas main pipe 4-2, and multiple power gas main pipes 4-2 can be arranged. Each sonic soot blower is parallel to the middle ash plate or the head end ash plate arranged below it; if the soot cleaning device 4-3 arranged on the power gas branch pipe 4-5 is a gas nozzle, the gas nozzle is located on the upper part of the head end ash plate. Figure 3 As shown, a power gas branch pipe 4-5 is arranged on each power gas main pipeline 4-2 at intervals of 0.2 to 0.4 meters, and multiple power gas branch pipes 4-5 can be arranged on one power gas main pipeline 4-2, and each gas nozzle is parallel to the middle ash plate or the head end ash plate arranged therebelow.

[0089] In an embodiment of the present invention, the number of sonic soot blowers arranged on the power gas branch pipe 4-5 is related to the length of the power gas main pipe 4-2, and is also related to the air pressure and air volume of the above-mentioned warm and pressurized oxygen-free gas. The length of the power gas branch pipe 4-5 is related to the area of ​​the ash collecting guide plate 1; the number of gas nozzles arranged on the power gas branch pipe 4-5 is related to the length of the power gas main pipe 4-2, and is also related to the air pressure and air volume of the above-mentioned warm and pressurized oxygen-free gas. The length of the power gas branch pipe 4-5 is related to the distance between the power gas main pipe 4-2 and the upper part of the head end ash sliding plate.

[0090] In actual application, compressed gas enters the power gas main pipeline 4-2 through the power gas inlet 4-1, and the power gas main pipeline 4-2 passes through the shell 3, the second insulation layer 3-1 of the high-temperature electrostatic precipitator or the power gas main pipeline 4-2 passes through the shell 3, the second insulation layer 3-1, the first insulation layer 3-2 and the ash collecting guide plate 1 of the high-temperature electrostatic precipitator and then enters the interior of the high-temperature electrostatic precipitator. Under the control of the controller, the solenoid valve 24 controls the gas on and off of the power gas main pipeline 4-2. The gas in the power gas main pipeline 4-2 is finally converted into high-intensity sound waves or wind force through the power gas branch pipe 4-5 and the cleaning device 4-3 to act on the accumulated ash on the ash collecting guide plate 1, so that the accumulated ash slides along the ash collecting guide plate 1 into the buried scraper conveyor 2 and is transported away, and the dust collector can operate efficiently and stably.

[0091] For example, Figures 4 to 6 As shown, the buried scraper conveyor 2 mainly includes a feed port 2-14, a first shaft 2-1, a second chain, a scraper 2-7, and a buried scraper conveyor housing 2-5.

[0092] In practical applications, the feed port 2-14 is arranged at the top of the buried scraper conveyor housing 2-5, and when the buried scraper conveyor 2 is arranged below the high-temperature electrostatic precipitator, the feed port 2-14 can be arranged opposite to the ash discharge port of the high-temperature electrostatic precipitator, that is, the high-temperature dust from the high-temperature electrostatic precipitator can enter the buried scraper conveyor 2. In the embodiment of the present invention, the specific position of the feed port 2-14 at the top of the buried scraper conveyor housing 2-5 is not limited.

[0093] Furthermore, the scraper conveyor 2 includes a first shaft 2-1, a first gear 2-2 is arranged on the first end outside the scraper conveyor 2, and two second gears 2-4 are arranged on the middle section inside the scraper conveyor 2. Specifically, a belt or a first chain is arranged on the first gear 2-2, and the belt or the first chain is connected to the motor 2-3 providing power. When the first gear 2-2 rotates, the first shaft 2-1 can be driven to rotate, and the rotation of the first shaft 2-1 can cause the two second gears 2-4 arranged on the first shaft 2-1 to rotate.

[0094] Furthermore, second chains are respectively arranged on the two second gears 2-4. In the embodiment of the present invention, the first end of the second chain is arranged on the second gear 2-4. Accordingly, a third gear is also arranged at the other end of the scraper conveyor 2. The second chain is simultaneously arranged on the second gear 2-4 and the third gear, so that the second chain can rotate around the second gear 2-4 and the third gear when the second gear 2-4 rotates.

[0095] It should be noted that there are also two third gears arranged at the other end of the scraper conveyor 2, and the two third gears correspond to the second gear 2-4 respectively. Since the second gear 2-4 rotates under the drive of the first shaft 2-1, it can drive the second chain to rotate. Therefore, the third gear arranged at the other end of the scraper conveyor 2 can be a driven wheel, that is, these two third gears do not need to be additionally provided with an external motor 2-3.

[0096] In an embodiment of the present invention, in order to prevent the high-temperature dust from the ash discharge port of the high-temperature electrostatic precipitator from accumulating on the bottom plate of the buried scraper conveyor, or being deposited on the bottom plate of the buried scraper conveyor due to temperature reasons, preferably, a scraper 2-7 is also provided between the two second chains. When the two second chains rotate around the second gear 2-4 and the third gear under the drive of the first shaft 2-1, the scraper 2-7 can be driven to rotate. When the scraper 2-7 rotates to above the bottom plate of the buried tube plate conveyor, the high-temperature dust fallen on the bottom plate of the buried scraper conveyor can be driven to move to the discharge port 2-15, so that the high-temperature dust from the high-temperature electrostatic precipitator can be transported from the ash discharge port to the discharge port 2-15.

[0097] The buried scraper conveyor 2 for insulated conveying of high-temperature materials has a double-layer structure as its shell, and insulation material is arranged between the double-layer structure to avoid the problem of easy temperature loss during the existing high-temperature dust transportation; further, by arranging two second chains on the first shaft 2-1 and increasing the specifications of the chains, and at the same time, because the shell is internally insulated, the problem of equipment expansion when the internal temperature of the buried scraper conveyor 2 is high is solved; further, by arranging a scraper 2-7 on the second chain, the high-temperature dust deposited on the bottom plate of the buried scraper conveyor can be scraped and transported to the discharge port 2-15, thereby solving the problem of high-temperature dust being deposited on the bottom plate of the buried scraper conveyor due to temperature changes.

[0098] For example, the buried scraper conveyor 2 for heat-insulated conveying of high-temperature materials includes a buried scraper conveyor shell 2-5. In order to facilitate transportation and be suitable for different application scenarios, preferably, the buried scraper conveyor shell 2-5 can include multiple sections, but in actual applications, the head end shell and the tail end shell are necessary, and the number of intermediate section shells can be adjusted according to actual conditions. For example, a buried scraper conveyor shell 2-5 includes only a head end shell and a tail end shell; a buried scraper conveyor shell 2-5 includes a head end shell, a tail end shell and an intermediate section shell; a buried scraper conveyor shell 2-5 includes a head end shell, a tail end shell and multiple intermediate section shells.

[0099] In actual application, a buried scraper conveyor shell 2-5, the head end shell of which is used to set the first shaft 2-1, the tail end shell is used to set the third gear and the second shaft, and the middle section shell is used to set the feed port 2-14 and the discharge port 2-15; a buried scraper conveyor shell 2-5, the head end shell is used to set the first shaft 2-1 and the feed port 2-14, the tail end shell is used to set the third gear, the second shaft and the discharge port 2-15; a buried scraper conveyor shell 2-5, the head end shell is used to set the first shaft 2-1 and the discharge port 2-15, and the tail end shell is used to set the third gear, the second shaft and the feed port 2-14.

[0100] For example, the feed port 2-14 can be set at the top of the head end shell, can be set at the top of the middle section shell, and can also be set at the top of the tail end shell; the discharge port 2-15 can be set at the bottom of the tail end shell, can be set at the bottom of the middle section shell, and can also be set at the bottom of the head end shell.

[0101] Specifically, when the buried scraper conveyor shell 2-5 includes a head end shell, multiple middle section shells and a tail end shell, in one way, when a feed port 2-14 is set at the top of the head end shell, a feed port 2-14 can also be set at the top of the middle section shell near the head end shell, and correspondingly, a discharge port 2-15 is set at the bottom of the middle section shell and the tail end shell near the tail end shell; in another way, when a discharge port 2-15 is set at the bottom of the head end shell, a discharge port 2-15 can also be set at the bottom of the middle section shell near the head end shell, and correspondingly, a feed port 2-14 is set at the top of the middle section shell and the tail end shell near the tail end shell.

[0102] The buried scraper conveyor 2 for insulated conveying of high-temperature materials provided in an embodiment of the present invention collects high-temperature dust with a temperature between 450°C and 600°C. In order to avoid the problem of damage to the shell due to expansion of the shell caused by high temperature when conveying high-temperature dust, preferably, if the buried scraper conveyor shell 2-5 includes multiple sections, an expansion gap is set in the contact area of ​​each section.

[0103] Specifically, an expansion gap is set between the head end shell and the tail end shell, an expansion gap is set between the head end shell and the middle section shell, an expansion gap is set between the middle section shell and the middle section shell, and an expansion gap is set between the middle section shell and the tail end shell.

[0104] For example, the number of scrapers 2-7 arranged on the second chain can include multiple scrapers 2-7, which can scrape the high-temperature dust on the bottom plate of the buried scraper conveyor in turn. In actual application, a gap is set between the lower surface of the scraper 2-7 and the bottom plate of the buried scraper conveyor.

[0105] In practical applications, the chain, guide rail 2-12 and scraper 2-7 are made of heat-resistant alloy steel, such as chromium-molybdenum steels such as 15CrMo, 35CrMo, 42CrMo and chromium-molybdenum-vanadium steels such as 12Cr1MoV; in the embodiment of the present invention, the specific materials of the chain, guide rail 2-12 and scraper 2-7 are not limited.

[0106] For example, the buried scraper conveyor shell 2-5 includes an inner shell 2-8 and an outer shell 2-9, and a heat-insulating material is arranged between the inner shell 2-8 and the outer shell 2-9. In the embodiment of the present invention, since the buried scraper conveyor 2 is generally suspended at the bottom of other equipment, in order to avoid excessive weight and put higher requirements on the supporting equipment, the heat-insulating material arranged between the inner shell 2-8 and the outer shell 2-9 is selected as a relatively light material as much as possible; but the chain and scraper 2-7 arranged in the buried scraper conveyor 2 may easily cause the inner shell 2-8 and the light heat-insulating material to be damaged due to collision, in the area where the bottom plate of the buried scraper conveyor is in direct contact with the high-temperature dust and the scraper 2-7, a wear-resistant castable 2-11 is selected for heat insulation, and the insulation thickness is 300mm, and the side wall and the top are selected with a bulk density of 220kg / m to reduce the weight. 3 The ceramic fiber module is used for insulation, and the insulation thickness is 300mm.

[0107] That is, the upper surface of the inner shell 2-8 is located directly above the two chains, and a ceramic fiber layer 2-10 and an outer shell 2-9 are arranged thereon; the lower surface of the inner shell 2-8 is in contact with the lower surface of the bottom plate of the buried scraper conveyor, and wear-resistant castable 2-11 and an outer shell 2-9 are arranged thereunder and on both sides; ceramic fiber layers 2-10 and outer shells 2-9 are arranged on both sides of the inner shell 2-8.

[0108] It should be noted that, in the embodiment of the present invention, when the buried scraper conveyor shell 2-5 includes an inner shell 2-8 and an outer shell 2-9, if the buried scraper conveyor shell 2-5 also includes multiple sections, that is, the buried scraper conveyor shell 2-5 includes a head end shell, a middle section shell and a tail end shell, or includes a head end shell and a tail end shell, each section of the shell also correspondingly includes an inner shell 2-8 and an outer shell 2-9.

[0109] For example, when the buried scraper conveyor shell 2-5 includes a head end shell, a middle section shell and a tail end shell, the head end shell includes an inner shell 2-8 and an outer shell 2-9, the middle section shell includes an inner shell 2-8 and an outer shell 2-9, and the tail end shell also includes an inner shell 2-8 and an outer shell 2-9. Specifically, the shape of the inner shell 2-8 and the outer shell 2-9 included in the head end shell is consistent with the shape of the head end shell, the shape of the inner shell 2-8 and the outer shell 2-9 included in the middle section shell is consistent with the shape of the middle section shell, and the shape of the inner shell 2-8 and the outer shell 2-9 included in the tail end shell is consistent with the shape of the tail end shell. In the embodiment of the present invention, the specific shape of the inner shell 2-8 and the outer shell 2-9 included in the head end shell, the middle section shell and the tail end shell is not limited, as long as the thermal insulation material arranged between the outer shell 2-9 and the inner shell 2-8 is consistent and plays the same role.

[0110] For example, the first end of the first shaft 2-1 is arranged outside the scraper conveyor housing 2-5, and the second end thereof is also arranged outside the scraper conveyor housing 2-5, that is, the first shaft 2-1 is arranged through the scraper conveyor housing 2-5. In practical applications, a bearing is arranged through a hole in the scraper conveyor housing 2-5, and the first shaft 2-1 is arranged on the scraper conveyor housing 2-5 through the bearing. In order to improve the sealing between the first shaft 2-1 and the scraper conveyor housing 2-5, preferably, a sealing filler is filled between the first shaft 2-1 and the bearing, and between the bearing and the scraper conveyor housing 2-5. In order to avoid air leakage between the first shaft 2-1 and the bearing, preferably, a protective cover 2-6 is arranged outside the bearing and the scraper conveyor housing 2-5, that is, a protective cover 2-6 is arranged between the first end of the first shaft 2-1 and the scraper conveyor housing 2-5, and a protective cover 2-6 is arranged between the second end of the first shaft 2-1 and the scraper conveyor housing 2-5; and the protective cover 2-6 and the scraper conveyor housing 2-5 are sealed by filling with nitrogen.

[0111] Since at least the first shaft 2-1 is set in the head end shell, and at least the second shaft is set in the tail end shell, in actual application, due to the high temperature of the high-temperature dust, the first shaft 2-1 and the second shaft will transfer heat to the head end shell and the tail end shell respectively under the action of high temperature, and the head end shell and the tail end shell will generate local high temperature, resulting in a decrease in the strength of the head end shell and the tail end shell, which will then cause the first shaft 2-1 and the second shaft to tilt, causing the buried scraper conveyor 2 for heat preservation transportation of high-temperature materials to fail. In an embodiment of the present invention, when nitrogen is filled between the protective cover 2-6 and the buried scraper conveyor shell 2-5, the nitrogen can not only seal the protective cover 2-6 and the buried scraper conveyor shell 2-5, but also cool down the high temperature generated when the first shaft 2-1 rotates, that is, cool down the high temperature from the first shaft 2-1, thereby avoiding the problem of softening the buried scraper conveyor shell 2-5 due to high temperature.

[0112] For example, the scraper conveyor 2 further includes a motor 2-3, a guide rail 2-12 and a guide rail 2-12 limiter 2-13. Specifically, the motor 2-3 and the first shaft 2-1 are arranged side by side outside the scraper conveyor 2, and are connected to the first gear 2-2 through a first chain;

[0113] Two guide rails 2-12 are arranged side by side at the bottom and the middle of the buried scraper conveyor 2, respectively. The guide rails 2-12 are arranged directly below the two second chains, and the two second chains are respectively clamped on the guide rails 2-12; a limit device 2-13 is arranged above each guide rail 2-12, and the limit device 2-13 is used to limit the height of the second chain.

[0114] An embodiment of the present invention provides a built-in ash hopper for cleaning ash accumulation and removing coke and is insulated conveying device, comprising: ash collecting guide plates, two groups of which are arranged at the bottom of a high-temperature electrostatic precipitator, for collecting high-temperature dust from the high-temperature electrostatic precipitator; an ash cleaning system, which is arranged on the ash collecting guide plates, for removing the high-temperature dust on the ash collecting guide plates; a buried scraper conveyor, which is arranged below the high-temperature electrostatic precipitator and is used to convey the high-temperature dust to a discharge port; wherein the buried scraper conveyor shell included in the buried scraper conveyor is a double-layer structure, and insulation material is arranged between the double-layer structure. An ash collecting guide plate is arranged in the high-temperature electrostatic precipitator to avoid the problem of the moving gears included in the scraping system being stuck due to high temperature; the ash collecting guide plate is arranged in the high-temperature electrostatic precipitator, has a simple structure, and can freely expand and contract at high temperature, avoiding the problem of the precipitator not being able to work normally due to high-temperature expansion; furthermore, the ash cleaning system arranged on the ash collecting guide plate can accelerate the recovery of the high-temperature dust accumulated on the ash collecting guide plate, avoiding the accumulation of high-temperature dust on the ash collecting guide plate; further, the buried scraper conveyor arranged under the high-temperature electrostatic precipitator has a double-layer structure for the high-temperature electrostatic precipitator shell, and thermal insulation material is arranged between the double-layer structure, avoiding the problem of easy temperature loss during the existing high-temperature dust transportation.

[0115] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0116] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A built-in ash hopper for cleaning ash and de-coking heat preservation and conveying device, characterized in that: include: Ash collecting guide plates, two groups of which are arranged at the bottom of the high-temperature electrostatic precipitator to collect high-temperature dust from the high-temperature electrostatic precipitator; An ash cleaning system is provided on the ash collecting guide plate and is used to remove high-temperature dust on the ash collecting guide plate; An embedded scraper conveyor is arranged below the high-temperature electrostatic precipitator and is used to convey the high-temperature dust to a discharge port; wherein the embedded scraper conveyor comprises an embedded scraper conveyor housing of a double-layer structure, and a heat-insulating material is arranged between the double-layer structures; The ash collecting and guiding plate at least comprises a head end ash gliding plate and a tail end ash gliding plate, the lower part of the head end ash gliding plate and the upper part of the tail end ash gliding plate are both connected to the shell, and the upper part of the head end ash gliding plate is in contact with the lower part of the tail end ash gliding plate; the contact is that the lower part of the tail end ash gliding plate overlaps the upper part of the upper part of the head end ash gliding plate, or the lower part of the tail end ash gliding plate is built on the upper part of the head end ash gliding plate through a support rod; The front end ash sliding board and the rear end ash sliding board are both inclined at an angle of 20°-70° to the horizontal plane; the inclination angle between the rear end ash sliding board and the horizontal plane is greater than or equal to the inclination angle between the front end ash sliding board and the horizontal plane.

2. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 1, characterized in that: The ash collecting and guide plate further comprises at least one intermediate ash sliding plate, both ends of which are in contact with the first end ash sliding plate and the terminal end ash sliding plate respectively; The front end ash sliding board is inclined at an angle of 20° to the horizontal plane, and the rear end ash sliding board is inclined at an angle of at least 20° to the horizontal plane; or The front end ash sliding board is inclined at an angle of 40° to the horizontal plane, and the rear end ash sliding board is inclined at an angle of at least 40° to the horizontal plane; or The front end ash sliding plate is inclined at an angle of 70° to the horizontal plane, and the rear end ash sliding plate is inclined at an angle of at least 70° to the horizontal plane.

3. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 1, characterized in that: A first thermal insulation layer is provided between each group of the ash collecting guide plates and the high-temperature electrostatic precipitator housing, and a second thermal insulation layer is provided on the high-temperature electrostatic precipitator housing; The head end and the tail end of each group of the ash collecting guide plates are in sealing contact with the high-temperature electrostatic precipitator shell; the two groups of the ash collecting guide plates and the high-temperature electrostatic precipitator shell form a cavity.

4. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 1, characterized in that: The dust cleaning system comprises: A power gas inlet, which is arranged outside the high-temperature electrostatic precipitator and connected to the power gas main pipeline, provides pressurized, warm and oxygen-free gas into the high-temperature electrostatic precipitator; An electromagnetic control valve, which is arranged on the power gas main pipeline and is located between the power gas inlet and the high-temperature electrostatic precipitator; A power gas main pipeline, one end of which is located outside the high-temperature electrostatic precipitator and the other end of which extends into the high-temperature electrostatic precipitator; The dust cleaning device is arranged on the dust collecting guide plate and connected to the power gas main pipeline, and is used for removing the high-temperature dust accumulated on the dust collecting guide plate.

5. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 4, characterized in that: Also included are a number of power gas manifolds; The outlet of the power gas main pipeline is vertically connected to a plurality of power gas branch pipes, and the interval between two adjacent power gas branch pipes is 0.2 meters to 2 meters, and a dust cleaning device is provided at the outlet of each power gas branch pipe; When multiple power gas branch pipes are located on the middle ash sliding board, each power gas branch pipe and the ash cleaning device have the same inclination angle as the middle ash sliding board; or when the power gas branch pipes are located on the first end ash sliding board, each power gas branch pipe and the ash cleaning device have the same inclination angle as the first end ash sliding board.

6. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 1, characterized in that: The buried scraper conveyor housing comprises an inner shell and an outer shell, and a heat-insulating material is arranged between the inner shell and the outer shell; The buried scraper conveyor also includes: A feed port, which is arranged at the top of the scraper conveyor housing and is used to receive high-temperature dust from the high-temperature electrostatic precipitator, wherein the temperature of the high-temperature dust is between 350°C and 600°C; A first shaft, a first gear is arranged on a first end outside the scraper conveyor, and two second gears are arranged on a middle section inside the scraper conveyor; A second chain, wherein two of the second chains are respectively arranged on the second gear and connected to two third gears located on the other side of the scraper conveyor; A scraper, which is arranged on the two chains, and is used to scrape the high-temperature dust arranged on the bottom plate of the scraper conveyor to the discharge port under the drive of the chains; The buried scraper conveyor shell comprises an inner shell and an outer shell, and a heat-insulating material is arranged between the inner shell and the outer shell.

7. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 6, characterized in that: The buried scraper conveyor housing includes multiple sections; The head end housing is used to set the first shaft, the tail end housing is used to set the third gear and the second shaft, and the middle section housing is used to set the feed port and the discharge port; Or the head end housing is used to set the first shaft and the feed port, and the tail end housing is used to set the third gear, the second shaft and the feed port; Or the head end housing is used to set the first shaft and the feed port, and the tail end housing is used to set the third gear, the second shaft and the feed port; Among them, an expansion gap is set between the head end shell and the tail end shell, an expansion gap is set between the head end shell and the middle section shell, an expansion gap is set between the middle section shell and the middle section shell, and an expansion gap is set between the middle section shell and the tail end shell.

8. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 6, characterized in that: The upper surface of the inner shell is located directly above the two chains, and the ceramic fiber layer and the outer shell are arranged thereon; The lower surface of the inner shell is in contact with the lower surface of the bottom plate of the scraper conveyor, and wear-resistant castables and the outer shell are arranged below and on both sides thereof; Ceramic fiber layers and the outer shell are arranged on both sides of the inner shell, wherein the thickness of the ceramic fiber layer is 300 mm, and the thickness of the wear-resistant castable is 300 mm.

9. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 6, characterized in that: The first shaft is arranged to penetrate the housing of the scraper conveyor, and the second end thereof is located outside the scraper conveyor; The first end of the first shaft is disposed on the housing of the scraper conveyor through a bearing; the second end of the first shaft is disposed on the housing of the scraper conveyor through a bearing; A filler is arranged between the bearing and the housing of the buried scraper conveyor.

10. The built-in ash hopper dust removal, de-coking and heat preservation conveying device according to claim 9, characterized in that: A protective cover is arranged outside the bearing and the buried scraper conveyor housing; The protective cover and the shell of the buried scraper conveyor are sealed with nitrogen.

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