Rake type ash remover

Abstract

The invention discloses a rake type ash cleaning device, belongs to the technical field of flue gas treatment equipment, solves the problem that dust in a gap between two adjacent groups of ash cleaning devices is not easy to clean, and adopts the technical scheme that the rake type ash cleaning device mainly comprises a mounting frame and a fixed frame, and further comprises a plurality of groups of ash cleaning mechanisms and a walking mechanism, a gap is formed between every two adjacent ash removal mechanisms, each ash removal mechanism comprises a fan, an ash removal rake plate and an ash removal pipe, the fans are arranged outside the denitration reactor body, the ash removal rake plates are arranged on the ash removal pipes, the ash removal rake plates are provided with ventilation cavities and communication ports, nozzles are arranged on the ash removal rake plates, the nozzles spray the gaps, and the walking mechanisms drive the ash removal rake plates to move in a reciprocating mode. And a pneumatic valve is arranged on the ash removal pipe, is closed when the traveling mechanism drives the ash removal rake plate to retreat and is opened when the traveling mechanism drives the ash removal rake plate to advance. The device is mainly used for effectively removing accumulated dust in a dust removal blind area, preventing the accumulated dust from hardening and curing, improving the dust removal efficiency and guaranteeing stable operation of a denitration system.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment equipment, in particular to a rake-type dust collector. Background Art

[0002] Flue gas denitrification (FGD) systems are crucial environmental protection equipment in industries like cement production. Flue gas contains large amounts of dust, which, upon entering the denitrification reactor, continuously deposits on the catalyst surface and internal components. This dust accumulation poses multiple hazards: First, the CaO component in the dust reacts with SO₃ in the flue gas to form CaSO₄, forming a dense coating that isolates the active catalyst surface. Second, long-term dust accumulation gradually hardens, clogging the catalyst's micropores. Furthermore, dust accumulation increases system resistance, leading to increased energy consumption from the induced draft fan.

[0003] The prior art CN221267698U discloses a rake-type dust collector, comprising a feeding device, a sootblowing main pipe and a plurality of rake pipes arranged below the sootblowing main pipe, and further comprising a hanging beam suspended in a reactor or a kiln above the sootblowing main pipe and at least one set of supporting mechanisms slidably mounted on the hanging beam for fixing the sootblowing main pipe and the rake pipes; each of the rake pipes is connected to the sootblowing main pipe, and a plurality of nozzles are mounted on the bottom surface of the rake pipe; the feeding device is used to drive the sootblowing main pipe and the rake pipes to perform reciprocating motion along the length direction of the hanging beam, and during the reciprocating motion, the high-pressure air fed into the sootblowing main pipe is ejected from the nozzles to act on the surface of the catalyst and thereby remove the accumulated dust.

[0004] The existing technology CN221267698U usually uses multiple groups of rake-type dust collectors arranged side by side to cover a large area of ​​the reactor cross-section. However, to avoid equipment interference, a certain gap must be left. These gap areas become blind spots for dust cleaning, and the accumulated dust cannot be effectively removed. As the operation time increases, the accumulated dust in the gaps will gradually harden and clump, which is not only more difficult to remove, but also spreads to the surrounding areas, seriously affecting the denitrification efficiency. More seriously, these accumulated dust blocks may fall off and block the catalyst channels, causing permanent damage. Summary of the Invention

[0005] The purpose of the present invention is to provide a rake-type dust cleaner to solve the problem that dust in the gap between two adjacent groups of dust cleaners is difficult to be cleaned, effectively remove dust accumulation in the blind area of ​​cleaning, prevent dust accumulation from hardening and solidifying, improve cleaning efficiency, and ensure stable operation of the denitrification system.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a rake-type dust cleaner, comprising a mounting frame and a fixed frame, wherein the mounting frame is arranged inside the denitration reactor body, and the fixed frame is arranged outside the denitration reactor body, and further comprising a dust cleaning mechanism and a walking mechanism, wherein the dust cleaning mechanism is provided with multiple groups, and a gap is left between two adjacent dust cleaning mechanisms, and the dust cleaning mechanism comprises a fan, a dust cleaning rake plate and a dust cleaning pipe, wherein one end of the dust cleaning pipe is arranged on the fixed frame and the other end is arranged on the mounting frame, the fan is arranged outside the denitration reactor body and is connected to the dust cleaning pipe, and the dust cleaning rake plate is arranged on the dust cleaning pipe. The ash cleaning rake is on the pipe and is located in the denitrification reactor body. The ash cleaning rake is provided with a ventilation cavity and a connecting port connected to the ventilation cavity. The ash cleaning pipe is connected to the ventilation cavity through the connecting port. A nozzle is provided on the side wall of the ash cleaning rake away from the connecting port. The spraying range of the nozzle covers the gap between the two adjacent cleaning mechanisms. The walking mechanism drives the ash cleaning rake to move back and forth in its width direction. The ash cleaning pipe is provided with a pneumatic valve for controlling the interruption of airflow in the ash cleaning pipe. The pneumatic valve is located at the air inlet end of the ash cleaning pipe. The pneumatic valve is closed when the walking mechanism drives the ash cleaning rake to retreat and opened when it moves forward.

[0007] After adopting the above technical scheme, the present invention has the following advantages: the gas outside the denitrification reactor body is introduced into the denitrification reactor body through the cleaning pipe, and is ejected from the nozzle on the side wall of the cleaning rake plate. The ejected gas impacts the catalyst surface, and removes the dust attached to the catalyst surface, so as to avoid the dust generating CaSO4 on the catalyst surface and attaching to the catalyst surface as the accumulation time increases, thereby affecting the contact between the catalyst and the flue gas, and further affecting the reaction effect of the flue gas in the denitrification reactor body, and ensuring that the catalyst can make the flue gas undergo a normal denitrification reaction in the denitrification reactor body; one end of the cleaning pipe is fixed by a mounting frame and the other end is fixed by a fixing frame, so as to improve the stability of the cleaning pipe, and the walking mechanism drives the cleaning rake plate to reciprocate, thereby increasing the cleaning range, and effectively avoiding the dust adhering to the catalyst surface and affecting the denitrification reaction of the flue gas; the form of the walking mechanism driving the cleaning rake plate to reciprocate can also reduce the cleaning The size of the rake plate is reduced, thereby reducing the weight of the cleaning mechanism located in the denitrification reactor body, ensuring the stability of the operation of the cleaning mechanism; the outermost nozzles at both ends of the cleaning rake plate in the length direction are tilted away from the center of the cleaning rake plate, and the dust in the gaps between adjacent rake-type cleaners is cleaned by the tilted nozzles, thereby improving the cleaning efficiency, effectively avoiding the dust adhering to the catalyst surface and affecting the denitrification reaction of the flue gas, and effectively avoiding the dust accumulated between two adjacent rake-type cleaners from solidifying due to long accumulation time; by arranging a pneumatic valve on the cleaning pipe, it is opened during the forward movement of the cleaning rake plate to ensure that the wind from the fan is blown out from the nozzle to remove the dust on the catalyst surface; the pneumatic valve is closed during the retreat of the cleaning rake plate, so that the cleaning pipe is shortened during the retreat, resulting in the original wind in the cleaning pipe being blown out from the nozzle, so that the nozzle continues to exhaust air outwards during the retreat, avoiding dust entering the nozzle and causing nozzle blockage.

[0008] Furthermore, the ash cleaning pipe includes an inner ash cleaning pipe and an outer ash cleaning pipe. One end of the inner ash cleaning pipe is arranged on a fixed frame, and the other end extends toward the denitrification reactor body. One end of the outer ash cleaning pipe is sleeved on the inner ash cleaning pipe and connected to a walking mechanism, and the other end extends into the denitrification reactor body and is connected and communicated with a cleaning rake plate. The walking mechanism drives the outer ash cleaning pipe to reciprocate relative to the inner ash cleaning pipe.

[0009] By adopting the above-mentioned technical solution, by setting the cleaning pipe into the form of an inner cleaning pipe and an outer cleaning pipe, it is ensured that reciprocating motion can be achieved, and at the same time, the gas can flow from the inner cleaning pipe to the outer cleaning pipe, and then be ejected from the cleaning rake plate and the nozzle. Through the connection and communication between the cleaning rake plate and the outer cleaning pipe, it is ensured that the cleaning rake plate reciprocates with the outer cleaning pipe, and at the same time, it is ensured that gas can be blown out from the nozzle to remove dust during the forward process.

[0010] Furthermore, a plurality of cleaning rake plates are provided along the length direction of the cleaning pipe, and the plurality of cleaning rake plates are connected to the cleaning pipe via a cleaning branch pipe.

[0011] By adopting the above-mentioned technical solution, multiple cleaning rakes are set in the length direction of the cleaning pipe to reduce the reciprocating stroke of the cleaning rake during the cleaning process, ensuring the stability of the cleaning rake during the reciprocating motion. The cleaning rake and the cleaning pipe are connected through a cleaning branch pipe to ensure that the cleaning gas can enter the cleaning rake from the cleaning pipe.

[0012] Furthermore, the cleaning rake plate is connected to the cleaning pipe through a first pipe body, and the cleaning rake plate can rotate relative to the first pipe body. A toggle piece is provided on the mounting frame. During the reciprocating motion of the cleaning rake plate, the toggle piece abuts so that the cleaning rake plate rotates and tilts relative to the cleaning pipe. A stabilizing piece is provided between the top of the cleaning rake plate and the cleaning pipe to stabilize the cleaning rake plate in an inclined state.

[0013] By adopting the above-mentioned technical solution, the cleaning rake plate and the cleaning pipe are connected through the first pipe body, and then the cleaning rake plate is rotatably arranged relative to the first pipe body, so that the cleaning rake plate can be rotatably connected to the cleaning pipe without affecting the gas flow between the cleaning pipe and the cleaning rake plate, and then a toggle piece is set on the mounting frame. When the cleaning rake plate contacts the toggle piece during the forward movement, the cleaning rake plate is deflected under the blocking action of the toggle piece, so that the nozzle is tilted in the forward direction, thereby increasing the range of dust removal by the cleaning rake plate and the nozzle, thereby improving the cleaning efficiency; a stabilizing piece is set between the cleaning rake plate and the cleaning pipe to improve the stability of the cleaning rake plate in the inclined state and ensure the cleaning effect in the inclined state.

[0014] Furthermore, the stabilizing member is a spring, which is in a compressed state. The compression amount of the spring in the inclined state is smaller than the compression amount of the cleaning rake plate when the cleaning rake plate is perpendicular to the cleaning pipe. When the cleaning rake plate is stable in the inclined state, the projections of the cleaning rake plate and the toggle member in the direction of the reciprocating motion of the cleaning rake plate overlap, so that when the reciprocating motion of the cleaning rake plate abuts against the toggle member, the cleaning rake plate rotates so that the cleaning rake plate avoids the toggle member.

[0015] By adopting the above-mentioned technical solution, the stabilizing member is set as a spring, and the compression amount in the inclined state is less than the compression amount in the vertical state. The cleaning rake plate only needs to abut against the toggle member in the reciprocating motion state to realize the rotation and tilting of the cleaning rake plate to increase the overlapping range of cleaning and improve the cleaning effect; when the cleaning rake plate is stable in the inclined state, there is a projection overlap between the cleaning rake plate and the toggle member, ensuring that the top end of the cleaning rake plate abuts against the toggle member during the forward movement of the cleaning rake plate, driving the lower end of the cleaning rake plate to tilt forward, and the top end of the cleaning rake plate abuts against the toggle member during the backward movement of the cleaning rake plate, driving the lower end of the cleaning rake plate to tilt backward, thereby increasing the repeated range of cleaning by the cleaning rake plate and improving the cleaning efficiency.

[0016] Furthermore, a plurality of cleaning rake plates are provided along the length direction of the cleaning pipe, connecting rods are provided between the plurality of cleaning rake plates, and the plurality of cleaning rake plates and the connecting rods are hingedly connected.

[0017] By adopting the above-mentioned technical solution, the catalyst is cleaned in the forward direction by multiple cleaning rakes, the stroke of the cleaning rakes in the reciprocating direction is reduced, the stability of the reciprocating motion of the cleaning rakes is ensured, and the cleaning effect of the cleaning rakes is ensured. The multiple cleaning rakes are connected together by connecting rods and are all connected in a hinged manner. A stabilizing part can be set on a cleaning rake, and only one toggle part can be set on the mounting frame, thereby reducing the parts of the cleaner and reducing costs.

[0018] Furthermore, the cleaning rake plate includes an upper plate body and a first support plate and a second support plate connected to the upper plate body. The upper plate body is connected and communicated with the cleaning outer tube. The first support plate and the second support plate are distributed along the reciprocating motion direction and extend downwardly. The distance between the first support plate and the second support plate gradually increases along the extension direction.

[0019] By adopting the above-mentioned technical solution, the first support plate and the second support plate are extended downwardly, and the distance between the first support plate and the second support plate gradually increases along the extension direction, thereby increasing the range of repeated cleaning of the two adjacent rake plates in the forward direction, thereby improving the cleaning effect.

[0020] Furthermore, the mounting frame includes a mounting beam and a suspension frame, the mounting beam extends along the reciprocating motion direction of the dust cleaning rake plate, one end of the suspension frame is slidably arranged on the mounting beam, and the other end is connected to the dust cleaning pipe.

[0021] By adopting the above-mentioned technical solution, the mounting frame is set up in the form of a mounting beam and a suspension frame, wherein one end of the suspension frame is connected to the dust cleaning pipe and the other end reciprocates on the mounting beam to ensure that the walking mechanism can drive the dust cleaning rake plate to reciprocate.

[0022] Furthermore, the suspension frame includes a first suspension plate, a second suspension plate and a roller, one end of the roller is connected to the first suspension plate and the other end is connected to the second suspension plate, and the first suspension plate and the second suspension plate are respectively arranged on both sides of the mounting beam, the roller is located above the mounting beam and the roller slides along the length direction of the mounting beam to cause the dust cleaning pipe to move back and forth.

[0023] By adopting the above-mentioned technical solution, when the traveling mechanism drives the cleaning rake plate to move back and forth, the roller rolls on the mounting beam, thereby reducing the friction during the reciprocating motion of the cleaning rake plate and reducing the energy consumption of the traveling mechanism. The first suspension plate and the second suspension plate are respectively arranged on both sides of the mounting beam, and the stability of the roller rolling is reduced, thereby reducing the possibility of the roller deflecting in the horizontal direction and affecting the cleaning effect.

[0024] Furthermore, the suspension frame also includes inclined plates distributed along the length direction of the mounting beam and arranged on both sides of the roller. The inclined plates extend downward at an angle, and the lower ends of the two inclined plates gradually move away from each other. The lower ends of the two inclined plates abut against the upper side wall of the mounting beam to clean dust on the mounting beam during the reciprocating motion.

[0025] By adopting the above-mentioned technical solution, two inclined plates are arranged on both sides of the roller along the length direction of the mounting beam to prevent dust from entering between the first hanging plate and the second hanging plate and contacting the roller, thereby reducing the accumulation of dust between the roller and the mounting beam and affecting the rolling of the roller on the mounting beam; the two inclined plates are arranged to extend downward away from each other to avoid dust accumulation on the inclined plates. During the reciprocating motion of the cleaning rake plate, the lower end of the inclined plate abuts against the mounting beam and removes the dust accumulated on the mounting beam, reducing the influence of dust accumulation on the movement of the roller and improving the stability of the roller movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 A schematic diagram of a rake-type dust collector according to the present invention; Figure 2 Schematic diagram of the installation distribution of the dust cleaning pipe and the dust cleaning rake plate in the present invention; Figure 3 Schematic diagram of the distribution of multiple groups of dust cleaning mechanisms in the present invention; Figure 4 It is a structural schematic diagram of the mounting frame of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6This is a schematic diagram of the structure of the dust cleaning pipe and the traveling mechanism in the present invention; Figure 7 This is a schematic diagram of the installation of the outer dust cleaning pipe, the dust cleaning rake plate and the stabilizing member in the present invention; Figure 8 Schematic diagram of the toggle member and the cleaning rake plate in the present invention; Figure 9 A schematic structural diagram of the upper plate, the first support plate, and the second support plate in the present invention; Figure 10 Schematic diagram of the structure of the suspension frame of the present invention; Figure 11 Schematic diagram of the distribution of the two inclined plates in the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0028] The terms "first," "second," and so on (if any) in the specification and claims of this invention are used to distinguish similar items, not to describe a specific order or precedence. Even if "second" is used to distinguish a technical feature, it does not necessarily imply the presence of "first." It should be understood that, in this invention, "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. It should be understood that, in this invention, "plurality" refers to two or more items. "And / or" simply describes an association between related items, indicating that three possible relationships exist. For example, "X and / or Y" can mean: X exists alone; X and Y exist simultaneously; or Y exists alone. The character " / " generally indicates that the related items are in an "or" relationship. "Including X, Y, and Z" means including all three of X, Y, and Z. "Including X, Y, or Z" means including any one of X, Y, and Z. "Including X, Y, and / or Z" means including any one, any two, or any three of X, Y, and Z.

[0029] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0030] like Figures 1 to 5As shown, the present invention provides a rake-type dust cleaner, comprising a mounting frame 1 and a fixing frame 2, wherein the mounting frame 1 is located inside the denitration reactor body 100, and the fixing frame 2 is located outside the denitration reactor body 100; further comprising a dust cleaning mechanism 3 and a walking mechanism 4, specifically, the dust cleaning mechanism 3 comprises a fan, a dust cleaning rake plate 32 and a dust cleaning pipe 31, one end of the dust cleaning pipe 31 is connected to the fixing frame 2, and the other end extends into the denitration reactor body 100 and is connected to the mounting frame 1, the fan is arranged outside the denitration reactor body 100 and communicates with the dust cleaning pipe 31, and the dust-removing gas is transported into the dust cleaning pipe 31 through the fan; as shown Figure 2 As shown, the cleaning rake plate 32 is provided with a ventilation cavity 321 and a connecting port 322 connected to the ventilation cavity 321, and is connected to the cleaning pipe 31 through the connecting port 322. A nozzle 323 is provided on the side wall of the cleaning rake plate 32 away from the connecting port 322. The gas entering the cleaning pipe 31 enters the ventilation cavity 321 from the connecting port 322, and is then ejected from the nozzle 323 to remove the dust accumulated on the catalyst 101, thereby effectively preventing the dust from accumulating on the catalyst 101, and then contacting and reacting with SO3 in the flue gas to generate CaSO4, forming a dense covering layer to isolate the active surface of the catalyst 101, affecting the catalytic effect of the catalyst 101, and thus affecting the denitrification effect of the flue gas in the denitrification reactor body 100. The walking mechanism 4 drives the cleaning rake plate 32 to reciprocate in the width direction of the cleaning rake plate 32. When the cleaning rake plate 32 can reciprocate, the width of the cleaning rake plate 32 can be reduced to a large extent, thereby reducing the weight of the cleaning rake plate 32, improving the stability of the cleaning rake plate 32 during the reciprocating motion, and thus ensuring the stability of the cleaning rake plate 32 during the cleaning process; since the length and width dimensions of the denitrification reactor body 100 are both large, the cleaning rake plate 32 in the length direction of the denitrification reactor body 100 ensures the cleaning range through the reciprocating motion of the walking mechanism 4, such as Figure 3 and Figure 4 As shown, in the width direction of the denitration reactor body 100, several groups of cleaning mechanisms 3 are set to clean the ash. In order to avoid mutual interference between adjacent cleaning mechanisms 3 during the reciprocating movement in the length direction of the denitration reactor body 100, a certain gap is reserved between two adjacent cleaning mechanisms 3. The spray range of the nozzle 323 covers the gap between the two adjacent cleaning mechanisms 3. Specifically, Figure 5As shown, the outermost nozzles 323 at both ends of the cleaning rake plate 32 in the length direction are tilted away from the center of the cleaning rake plate 32, and the dust in the gap between the two adjacent cleaning mechanisms 3 is cleared by the tilted nozzles 323, so as to avoid the continuous accumulation of dust on the catalyst 101 between the two adjacent cleaning mechanisms 3, and to avoid the dust in the gap from gradually hardening and agglomerating as the accumulation time increases and becoming difficult to remove; in another embodiment, the nozzle 323 used can be a Venturi nozzle 323, so as to ensure that the gas ejected by the nozzle 323 can enter the gap between the two adjacent cleaning mechanisms 3 to remove the dust.

[0031] In order to prevent dust from entering the nozzle due to negative pressure during the retreat of the cleaning rake 32, a pneumatic valve for controlling the air flow in the cleaning pipe 31 is provided on the cleaning pipe 31. The pneumatic valve is located at the air inlet end of the cleaning pipe 31. The pneumatic valve is opened when the walking mechanism 4 drives the cleaning rake 32 forward, so that the wind blown in by the fan enters the cleaning rake 32 from the cleaning pipe 31 and is ejected from the nozzle 323 for cleaning. The pneumatic valve is closed during the retreat of the cleaning rake 32. During the retreat of the cleaning rake 32, the volume of the space for storing air in the cleaning pipe 31 is reduced. Due to the closure of the pneumatic valve, part of the gas is discharged from the nozzle 323 during the process of reducing the space, thereby preventing dust from entering the nozzle 323 and causing blockage of the nozzle 323 during the retreat of the cleaning rake 32. In another embodiment, an anti-blocking fan can also be set on the fixed frame 2. The anti-blocking fan injects gas into the cleaning pipe 31 during the retreat of the cleaning rake plate 32, so that the nozzle 323 maintains a gas-ejecting state, thereby preventing dust from entering the nozzle 323 and causing blockage of the nozzle 323 during the retreat of the cleaning rake plate 32.

[0032] like Figure 1 and Figure 6As shown, to ensure that the traveling mechanism 4 can drive the cleaning rake plate 32 to reciprocate, the cleaning pipe 31 includes an inner cleaning pipe 311 and an outer cleaning pipe 312. One end of the inner cleaning pipe 311 is arranged on the fixing frame 2, and the other end extends toward the denitration reactor body 100. One end of the outer cleaning pipe 312 is sleeved on the inner cleaning pipe 311 and connected to the traveling mechanism 4, and the other end extends into the denitration reactor body 100 and is connected to the cleaning rake plate 32 and communicates. The traveling mechanism 4 drives the outer cleaning pipe 312 to reciprocate relative to the inner cleaning pipe 311. Specifically, when the ash cleaning mechanism 3 is required to perform ash cleaning, the pneumatic valve and the travel mechanism 4 are opened, and the fan delivers air into the ash cleaning inner tube 311. The travel mechanism 4 drives the ash cleaning outer tube 312 to move relative to the ash cleaning inner tube 311, thereby driving the ash cleaning rake 32 to move forward. The air entering the ash cleaning inner tube 311 sequentially enters the ash cleaning outer tube 312 and the ventilation cavity 321 of the ash cleaning rake 32, and is then ejected from the nozzle 323. During the process of the nozzle 323 ejecting gas to clean the ash, the ash cleaning rake 32 continues to move forward to clean the ash. The arrangement of the ash cleaning inner tube 311 and the ash cleaning outer tube 312 allows the travel mechanism 4 to be installed outside the denitrification reactor body 100, thereby avoiding the influence of the flue gas temperature when it is installed inside the denitrification reactor body 100, ensuring the stability of the reciprocating motion of the ash cleaning rake 32, and thus improving the stability of the ash cleaning effect.

[0033] like Figure 1 As shown, in order to shorten the reciprocating stroke of the cleaning rake plates 32, multiple cleaning rake plates 32 are provided along the length direction of the cleaning tube 31; specifically, three cleaning rake plates 32 are provided in the length direction of the cleaning tube 31, and the three cleaning rake plates 32 are distributed at equal intervals. The forward stroke of the cleaning rake plates 32 is slightly greater than the distance between two adjacent cleaning rake plates 32. By providing three cleaning rake plates 32 and the distance between two adjacent cleaning rake plates 32 is slightly smaller than the stroke of the cleaning rake plates 32, the size of the cleaning rake plates 32 in the reciprocating direction can be reduced, so that the overall weight of the three cleaning rake plates 32 is relatively small when the movement stroke of the cleaning rake plates 32 is reduced, thereby improving the cleaning effect while ensuring the stability of the cleaning rake plates 32 during the reciprocating motion.

[0034] In another embodiment, Figure 1 and Figure 7 As shown, under the condition that the reciprocating stroke of the cleaning rake 32 remains unchanged, in order to increase the overlapping cleaning range of the cleaning rake 32, the cleaning rake 32 is connected to the cleaning pipe 31 through the first tube body 313, and the cleaning rake 32 can rotate relative to the first tube body 313; in this embodiment, the communication port 322 and the nozzle 323 are located on the adjacent two side walls, the first tube body 313 is connected to the communication port 322, and the upper end of the cleaning rake 32 is located above the cleaning pipe 31, as shown in FIG. Figure 7 and Figure 8As shown, a toggle piece 111 is provided on the mounting frame 1, and the upper end of the cleaning rake plate 32 abuts against the toggle piece 111 during the reciprocating motion, so that the cleaning rake plate 32 rotates to an inclined state relative to the first tube body 313, and the cleaning rake plate 32 is inclined to increase the cleaning range of the gas ejected by the nozzle 323. Compared with the vertical state of the cleaning rake plate 32, the overlapping range of the cleaning nozzles 323 on the two adjacent cleaning rake plates 32 is increased, thereby improving the cleaning effect; a stabilizing piece 314 is provided between the top end of the cleaning rake plate 32 and the cleaning pipe 31 to stabilize the cleaning rake plate 32 in an inclined state, thereby ensuring that the cleaning rake plate 32 can remain in an inclined state to increase the overlapping range of cleaning. In this embodiment, the toggle member 111 is hinged to the mounting beam 11, and a torsion spring is provided between the toggle member 111 and the mounting beam 11 to drive the toggle member 111 to reset. When the walking mechanism 4 drives the cleaning rake plate 32 to retreat, when the upper end of the cleaning rake plate 32 abuts against the lower end of the toggle member 111, the toggle member 111 rotates appropriately to deviate and avoid the cleaning rake plate 32, thereby ensuring that the cleaning rake plate 32 can retreat.

[0035] In this embodiment, the stabilizing member 314 is specifically a spring. When the cleaning rake plate 32 is in an inclined state, the spring is in a compressed state. When the length direction of the spring is perpendicular to the length direction of the cleaning pipe 31, the spring is also in a compressed state, and the compression amount at this time is greater than the compression amount in the inclined state, ensuring that when the top end of the cleaning rake plate 32 contacts the top end of the toggle member 111, the cleaning rake plate 32 can be deflected and maintained in an inclined state; when the cleaning rake plate 32 is stable in an inclined state, the projections of the cleaning rake plate 32 and the toggle member 111 in the direction of the reciprocating motion of the cleaning rake plate 32 overlap, so that when the cleaning rake plate 32 reciprocates and abuts against the toggle member 111, the cleaning rake plate 32 rotates so that the cleaning rake plate 32 can contact the toggle member 111 and rotate to avoid the toggle member 111. In another embodiment, the stabilizing member 314 can also be In order to reduce the number of parts between the cleaning pipe 31 and the cleaning rake plate 32, such as Figure 1 As shown, multiple cleaning rake plates 32 are provided along the length direction of the cleaning tube 31, and connecting rods are provided between the multiple cleaning rake plates 32. The multiple cleaning rake plates 32 and the connecting rods are hingedly connected. Only one cleaning rake plate 32 is provided with a spring, and only one corresponding toggle member 111 is provided, which can ensure that the multiple cleaning rake plates 32 are deflected synchronously, thereby reducing the setting of the spring and the toggle member 111, increasing the overlapping range of cleaning, and improving the cleaning effect.

[0036] In another embodiment, Figure 9As shown, the cleaning rake plate 32 includes an upper plate body 324 and a first support plate 325 and a second support plate 326 connected to the upper plate body 324; specifically, the upper plate body 324, the first support plate 325 and the second support plate 326 are all U-shaped plates, and are connected to each other in one piece. The upper plate body 324 and the first support plate 325 and the second support plate 326 are hollow and form a ventilation cavity 321. The upper plate body 324 is connected to the cleaning outer tube 312. The first support plate 325 and the second support plate 326 are distributed along the reciprocating motion direction and extend downwardly. The distance between the first support plate 325 and the second support plate 326 gradually increases along the extension direction. By setting the distance between the lower ends of the first support plate 325 and the second support plate 326 to gradually increase, the overlapping range of cleaning between the two adjacent cleaning rake plates 32 is increased, and the cleaning effect is improved.

[0037] To ensure that the cleaning rake plate 32 can stably reciprocate on the mounting frame 1, as shown in FIG. Figure 1 and Figure 10 As shown, the mounting frame 1 includes a mounting beam 11 and a suspension frame 12, the mounting beam 11 extends along the reciprocating motion direction of the cleaning rake plate 32, one end of the suspension frame 12 is slidably arranged on the mounting beam 11, and the other end is connected to the cleaning pipe 31; specifically, the suspension frame 12 includes a first suspension plate 121, a second suspension plate 122 and a roller 123, one end of the roller 123 is connected to the first suspension plate 121, and the other end is connected to the second suspension plate 122, and the first suspension plate 121 and the second suspension plate 122 are respectively arranged on both sides of the mounting beam 11, the roller 123 is located above the mounting beam 11 and the roller 123 slides along the length direction of the mounting beam 11 to cause the reciprocating motion of the cleaning pipe 31.

[0038] In this embodiment, if Figure 10 and Figure 11 As shown, the hanger 12 further includes inclined plates 124 distributed along the length of the mounting beam 11 and disposed on both sides of the roller 123. The inclined plates 124 extend downwardly at an angle, with the lower ends of the two inclined plates 124 gradually moving away from each other to prevent the lower ends of the inclined plates 124 from affecting the rolling motion of the roller 123. The lower ends of the two inclined plates 124 abut against the upper side wall of the mounting beam 11 to clean dust on the mounting beam 11 during reciprocating motion, thereby preventing excessive dust accumulation on the mounting beam 11 from affecting the rolling motion of the roller 123 and, in turn, the reciprocating motion of the dust cleaning rake 32. The first hanging plate 121, the second hanging plate 122, and the two inclined plates 124 form a space surrounding the roller, reducing dust from contacting and adhering to the roller 123 and affecting its rolling motion.

[0039] In another embodiment, the walking mechanism 4 includes a driving member 41 and a transmission member 42, the driving member 41 is arranged on the fixed frame 2, the transmission member 42 is arranged on the fixed frame 2, the transmission member 42 is connected to the driving member 41, and the other side of the transmission member 42 is connected to the cleaning outer tube 312; specifically, the transmission member 42 includes a gear and a rack, wherein the gear is arranged at the output end of the transmission member, and when the transmission member is started, it drives the gear to rotate, and the rack is arranged on the outer wall of the cleaning outer tube 312, and the rack extends along the length direction of the cleaning outer tube 312. The gear and the rack are engaged for transmission. After the driving member 41 is started according to the cleaning needs, the driving member 41 drives the cleaning outer tube 312 to move forward relative to the cleaning inner tube 311 through the meshing transmission of the gear and the rack, thereby driving the cleaning rake plate 32 to move forward for cleaning.

[0040] In addition to the above-mentioned preferred embodiments, the present invention has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A rake-type dust cleaner, comprising a mounting frame and a fixed frame, wherein the mounting frame is installed in the denitration reactor body and the fixed frame is installed outside the denitration reactor body, and further comprising a dust cleaning mechanism and a walking mechanism, wherein the dust cleaning mechanism is provided in multiple groups, and a gap is left between adjacent dust cleaning mechanisms, characterized in that: The dust cleaning mechanism includes a fan, a dust cleaning rake and a dust cleaning pipe. One end of the dust cleaning pipe is arranged on a fixed frame and the other end is arranged on a mounting frame. The fan is arranged outside the denitrification reactor body and is connected with the dust cleaning pipe. The dust cleaning rake is arranged on the dust cleaning pipe and is located in the denitrification reactor body. The dust cleaning rake is provided with a ventilation cavity and a connecting port connected with the ventilation cavity. The dust cleaning pipe is connected with the ventilation cavity through the connecting port. A nozzle is provided on the side wall of the dust cleaning rake away from the connecting port. The spraying range of the nozzle covers the gap between two adjacent dust cleaning mechanisms. The walking mechanism drives the dust cleaning rake to reciprocate in its width direction. The dust cleaning pipe is provided with a pneumatic valve for controlling the interruption of airflow in the dust cleaning pipe. The pneumatic valve is located at the air inlet end of the dust cleaning pipe. The pneumatic valve is closed when the walking mechanism drives the dust cleaning rake to retreat and opens when it moves forward.

2. The rake-type dust collector according to claim 1, characterized in that: The ash cleaning pipe includes an inner ash cleaning pipe and an outer ash cleaning pipe. One end of the inner ash cleaning pipe is arranged on a fixed frame, and the other end extends toward the denitrification reactor body. One end of the outer ash cleaning pipe is sleeved on the inner ash cleaning pipe and connected to a walking mechanism, and the other end extends into the denitrification reactor body and is connected and communicated with the ash cleaning rake plate. The walking mechanism drives the outer ash cleaning pipe to reciprocate relative to the inner ash cleaning pipe.

3. The rake-type dust collector according to claim 1, characterized in that: The cleaning rake plates are arranged in plurality along the length direction of the cleaning pipe, and the plurality of cleaning rake plates are connected to the cleaning pipe via a cleaning branch pipe.

4. The rake-type dust collector according to claim 1, characterized in that: The cleaning rake plate is connected to the cleaning pipe through a first pipe body, and the cleaning rake plate can rotate relative to the first pipe body. A toggle piece is provided on the mounting frame. During the reciprocating motion of the cleaning rake plate, the toggle piece abuts so that the cleaning rake plate rotates and tilts relative to the cleaning pipe. A stabilizing piece is provided between the top of the cleaning rake plate and the cleaning pipe to stabilize the cleaning rake plate in an inclined state.

5. The rake-type dust collector according to claim 4, characterized in that: The stabilizing member is a spring, which is in a compressed state. The compression amount of the spring in the inclined state is smaller than the compression amount of the cleaning rake plate when it is perpendicular to the cleaning pipe. When the cleaning rake plate is stable in the inclined state, the projections of the cleaning rake plate and the toggle member in the direction of the reciprocating motion of the cleaning rake plate overlap, so that when the reciprocating motion of the cleaning rake plate abuts against the toggle member, the cleaning rake plate rotates so that the cleaning rake plate avoids the toggle member.

6. The rake-type dust collector according to claim 4, characterized in that: The cleaning rake plates are provided in plurality along the length direction of the cleaning pipe, connecting rods are provided between the plurality of cleaning rake plates, and the plurality of cleaning rake plates and the connecting rods are hingedly connected.

7. The rake-type dust collector according to claim 1, characterized in that: The cleaning rake plate includes an upper plate body and a first support plate and a second support plate connected to the upper plate body. The upper plate body is connected and communicated with the cleaning outer pipe. The first support plate and the second support plate are distributed along the reciprocating motion direction and extend downwardly. The distance between the first support plate and the second support plate gradually increases along the extension direction.

8. The rake-type dust collector according to claim 1, characterized in that: The mounting frame includes a mounting beam and a suspension frame. The mounting beam extends along the reciprocating motion direction of the dust cleaning rake plate. One end of the suspension frame is slidably arranged on the mounting beam, and the other end is connected to the dust cleaning pipe.

9. The rake-type dust collector according to claim 8, characterized in that: The suspension frame includes a first suspension plate, a second suspension plate and a roller, one end of the roller is connected to the first suspension plate and the other end is connected to the second suspension plate, and the first suspension plate and the second suspension plate are respectively arranged on both sides of the mounting beam. The roller is located above the mounting beam and slides along the length direction of the mounting beam to cause the dust cleaning pipe to move back and forth.

10. The rake-type dust collector according to claim 8, characterized in that: The suspension frame also includes inclined plates distributed along the length direction of the mounting beam and arranged on both sides of the roller. The inclined plates extend downward at an angle, and the lower ends of the two inclined plates gradually move away from each other. The lower ends of the two inclined plates abut against the upper side wall of the mounting beam to clean dust on the mounting beam during reciprocating motion.

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