Dust trapping and purifying device for cement kiln head waste gas
By setting a micro-dimpled array and a flow channel structure on the surface of the dust collection plate, combined with high-frequency vibration and a hydrophobic and oleophobic coating, the problem of secondary dust generation caused by traditional mechanical vibration dust removal is solved, and efficient dust collection and settling are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-12
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional mechanical vibration dust removal methods are prone to causing secondary dust generation during cement kiln head dust removal, a problem that is difficult to solve effectively with existing technologies.
The method employs a micro-pit array and flow channel structure on the surface of the dust collection plate. The dust is locked in by the vortex effect in the micro-pits, and the dust is stably settled by the flow channel design and lateral shear vibration. Combined with high-frequency vibration and hydrophobic and oleophobic coating, the probability of secondary dust re-entrainment is reduced.
It significantly reduces the occurrence of secondary dust, improves dust removal efficiency and effectiveness, ensures dust settles in a stable environment, and reduces the risk of re-entry into the airflow.
Smart Images
Figure CN121820052A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of industrial flue gas dust removal and environmental protection, and particularly relates to a dust capturing and purifying device for cement kiln head waste gas. BACKGROUND
[0002] In the cement production process, the waste gas discharged from the rotary kiln head (grate cooler) has a huge air volume, a relatively high temperature, and contains a large amount of clinker dust with high hardness. In order to meet the increasingly stringent atmospheric pollutant emission standards, the electrostatic precipitator has always been the mainstream or an important pretreatment device for dust removal of the cement kiln head, because it has a large processing air volume, is high-temperature resistant, has low resistance, and has relatively low operation and maintenance costs.
[0003] A traditional dry plate-type electrostatic precipitator mainly comprises a discharge electrode (cathode wire) and a dust collecting electrode (anode plate). Its working principle is to ionize the gas by using a high-voltage electric field, so that the dust is charged and moves to the dust collecting electrode under the action of the electric field force and is deposited. In order to remove the dust layer accumulated on the surface of the anode plate, a mechanical rapping device is generally used in the prior art. When the dust accumulates to a certain thickness, the rapping hammer knocks the anvil of the anode row, and the mechanical shock wave and acceleration generated thereby make the plate vibrate at a high frequency, so as to destroy the adhesion between the dust and the plate, and make the dust layer peel off and fall into the ash hopper below.
[0004] However, in actual operation, especially for the specific working condition of the clinker dust of the cement kiln head, the traditional mechanical rapping dust removal method still causes the problem of secondary dust raising. SUMMARY
[0005] The purpose of the present application is to provide a dust capturing and purifying device for cement kiln head waste gas, which can avoid the occurrence of secondary dust raising as much as possible and improve the dust removal efficiency and effect of the device.
[0006] The dust capturing and purifying device for cement kiln head waste gas provided by the present application adopts the following technical scheme: The dust capturing and purifying device for cement kiln head waste gas comprises a shell, a discharge electrode assembly and a dust collecting electrode assembly arranged in the shell, and a rapping dust removal assembly. The dust collecting electrode system comprises a plurality of dust collecting electrode plates arranged in parallel. The surface of the dust collecting electrode plate is provided with a plurality of longitudinal through-flow grooves arranged at intervals along the direction of the gas flow. A micro-pit array is arranged on the plate surface between the adjacent two flow grooves. The micro-pit array is used for capturing dust. The depth of the flow groove is greater than the depth of the micro-pit. When the dust in the micro-pit is separated by the rapping force, it can flow into the flow groove located on the downstream side of the plate surface along the direction of the gas flow and be deposited.
[0007] Optionally, the micro-pit is an asymmetric spoon-shaped structure, the spoon-shaped structure comprising a blocking edge on the upstream side of the airflow and a guiding slope on the downstream side of the airflow, the blocking edge being used to force the horizontal airflow to separate to pass over the micro-pit opening, and the guiding slope extending downwardly along the surface of the plate and pointing to the adjacent flow guide groove on the downstream side of the micro-pit.
[0008] Optionally, the width of the flow guide groove is less than the opening diameter of the micro-pit.
[0009] Optionally, the cross section of the flow guide groove is in the shape of Ω, and the bottom of the flow guide groove is provided with a fluttering film assembly for improving the flowability of dust.
[0010] Optionally, the fluttering film assembly comprises a high-temperature-resistant metal film strip, and the metal film strip is suspended at the opening of the bottom of the flow guide groove.
[0011] Optionally, the inner surface of the micro-pit is provided with a hydrophobic and oleophobic coating.
[0012] Optionally, the rapping and dust cleaning assembly is configured to generate a lateral shear vibration, the direction of the shear vibration being perpendicular to the extension direction of the flow guide groove, so as to promote the transverse sliding of dust from the micro-pit to the flow guide groove.
[0013] In summary, the present application has at least one of the following beneficial technical effects: 1. The present application provides an array of micro-pits and flow guide grooves on the surface of the dust collection plate. When the smoke passes through the surface of the dust collection plate, the surface of the dust collection plate will adsorb dust, and the micro-pit will also adsorb dust. The micro-pit utilizes the vortex effect of the fluid boundary layer to lock the dust under strong airflow scouring. The deep flow guide groove provides a relatively stable environment, which completely separates the dust trapping area and the settling area from the physical structure. When the dust is stripped from the micro-pit and quickly flows into the flow guide groove, the dust can settle in the flow guide groove with a relatively stable environment and less gas flow, thereby effectively avoiding the secondary dust raising phenomenon caused by airflow scouring during rapping of the traditional flat plate electrode. 2. By adopting the spoon-shaped micro-pit structure and the setting of the Omega-shaped guide groove, the barrier above the spoon-shaped micro-pit is forced to separate the boundary layer by using the inertia of the high-speed airflow, and the high-speed airflow jumps over the micro-pit opening, thereby forming a stable low-speed area in the micro-pit, effectively locking the dust, thereby minimizing the probability that the airflow will carry out the dust in the micro-pit, and the guide slope located on the downstream side and below the airflow provides convenience for the dust in the micro-pit to flow into the guide groove, and after the dust leaves the micro-pit, it does not fall vertically for a long distance, but slides laterally into the adjacent guide groove along the relatively shortest path, this structure compresses the exposure time of the dust on the open surface to the minimum, reduces the risk of returning to the airflow, thereby further reducing the probability of secondary dust generation; 3. After a long time of work, the dust in the guide groove is easy to be hardened, the metal film strip is suspended at the bottom of the groove, under the same low-frequency mechanical beating excitation, the metal film strip can excite high-frequency and small-amplitude vibration due to its small mass and stiffness, and the high-frequency vibration can break the hardened dust into small pieces or particles, so that the dust can smoothly settle in the guide groove; 4. The lateral shearing vibration mode provided by the application provides shearing vibration perpendicular to the extension direction of the guide groove, which can provide the dust in the spoon-shaped micro-pit with the maximum transverse inertia component pointing to the guide groove, and the transverse force and the guide slope of the pit are used together to relatively efficiently throw the dust directly into the guide groove, thereby further accelerating the speed of the dust entering the guide groove, and further improving the dust removal efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application; Figure 2 is a schematic diagram of the internal structure of the shell in the embodiment of the application; Figure 3 is Figure 2 an enlarged structure schematic diagram of A in the embodiment; Figure 4 is a structure schematic diagram of the dust collecting electrode assembly in the embodiment of the application; Figure 5 is Figure 4 an enlarged structure schematic diagram of B in the embodiment; Figure 6 is Figure 5 an enlarged structure schematic diagram of D in the embodiment; Figure 7 is Figure 4 an enlarged structure schematic diagram of C in the embodiment; In the figure, 1, housing; 11, smoke inlet; 12, air outlet; 13, collecting funnel; 2, discharge electrode assembly; 3, dust collecting electrode assembly; 31, dust collecting electrode plate; 311, micro-pit; 312, blocking edge; 313, guide slope; 314, flow guide groove; 4, fluttering film assembly; 41, metal film strip; 5, rapping and dust cleaning assembly; 51, connecting rod; 52, driving rod; 53, connecting block; 54, rapping block; 55, driving motor. DETAILED DESCRIPTION
[0015] The following will be described in detail in combination with the accompanying drawings. Figures 1-7 The present application will be further described in detail.
[0016] A dust capturing and purifying device for cement kiln head exhaust gas, referring to Figures 1-7 , comprising a housing 1, a discharge electrode assembly 2 and a dust collecting electrode assembly 3 arranged in the housing 1, and a rapping and dust cleaning assembly 5.
[0017] The housing 1 in the embodiment is provided with a support below for supporting the whole device, one side of the housing 1 is provided with a smoke inlet 11, the side opposite to the smoke inlet 11 of the housing 1 is provided with an air outlet 12, and a plurality of collecting funnels 13 for discharging dust are arranged below the housing 1.
[0018] Referring to Figure 1 , Figure 2 and Figure 3The dust collecting electrode assembly 3 in the embodiment includes a plurality of parallel arranged dust collecting electrode plates 31, the plurality of dust collecting electrode plates 31 are located inside the shell 1, and the plurality of dust collecting electrode plates 31 are arranged along the direction perpendicular to the flue gas flow direction, a channel for flue gas flow is left between the adjacent two dust collecting electrode plates 31, the plurality of dust collecting electrode plates 31 are hung on the inner wall of the top of the shell 1, and the plurality of dust collecting electrode plates 31 are located directly above the collecting funnel 13, the discharge electrode assembly 2 in the embodiment is a spiral electrode column, a plurality of electrode columns are also provided in the embodiment, the plurality of electrode columns are arranged between the adjacent two dust collecting electrode plates 31, and the electrode column does not contact the dust collecting electrode plate 31, the plurality of electrode columns are arranged along the vertical direction, and the plurality of electrode columns are fixedly installed on the inner wall of the top of the shell 1, a power supply assembly (not shown in the figure) is also arranged in the shell 1, the positive electrode of the power supply assembly is electrically connected with the plurality of dust collecting electrode plates 31, and the negative electrode of the power supply assembly is electrically connected with the plurality of electrode columns, so that the dust collecting electrode plate 31 is positively charged, and the electrode column is positively charged, a vibrating and rapping ash removal assembly 5 for knocking the dust collecting electrode plate 31 is also arranged on one side of the dust collecting electrode plate 31, when the flue gas flows through the channel between the adjacent two dust collecting electrode plates 31, the dust in the flue gas also carries a negative charge due to absorbing the negative charge on the electrode column, the positive and negative charges attract each other, so the dust carrying the negative charge is adsorbed on the dust collecting electrode plate 31, then when the vibrating and rapping ash removal assembly 5 knocks the dust collecting electrode plate 31, the dust collecting electrode plate 31 vibrates, so that part of the dust adsorbed on the dust collecting electrode plate 31 is vibrated and falls, and then the vibrated and fallen dust falls into the collecting funnel due to the action of gravity, so that the dust in the flue gas is captured and purified (this is the prior art, and will not be described in detail here).
[0019] With reference to Figure 4 , Figure 5 and Figure 6 , the dust collecting electrode plate 31 in the embodiment is provided with a plurality of micro pits 311 for capturing dust on the end face opposite to the electrode column, and the end face of the dust collecting electrode plate 31 is also provided with a longitudinally arranged flow guide groove 314.
[0020] The flow guide groove 314 in the embodiment penetrates the bottom of the dust collecting electrode plate 31, the depth of the flow guide groove 314 is much greater than the depth of the micro pit 311, and the flow guide groove 314 in the embodiment is provided with a plurality of flow guide grooves 314, the plurality of flow guide grooves 314 are uniformly and spacedly arranged along the length direction of the dust collecting electrode plate 31, and a plurality of micro pits 311 are arranged between the two adjacent flow guide grooves 314, the micro pit 311 in the embodiment is provided with a spoon type structure from the upstream side of the airflow to the downstream side of the airflow, the spoon type structure in the embodiment includes a blocking portion 312 located on the upstream side of the airflow and a guide slope 313 located on the downstream side of the airflow, the guide slope 313 in the embodiment is arranged along the surface of the dust collecting electrode plate 31, and the guide slope 313 in the embodiment is arranged to be inclined downward along the direction close to the flow guide groove 314 located on the downstream side of the airflow.
[0021] When it is needed to collect and purify the dust in the exhaust gas generated by the cement kiln head, the exhaust gas generated by the cement kiln head is introduced into the smoke inlet 11 of the shell 1 through the external pipeline, and then the dust particles in the flue gas absorb the negative charge released by the electrode column when flowing through the channel between the adjacent two dust collecting electrode plates 31, so the dust particles also carry negative charge. Since the dust collecting electrode plate 31 is positively charged, the dust with negative charge will move along the direction close to the dust collecting electrode plate 31, and the dust particles will be adsorbed on the surface of the dust collecting electrode plate 31. In the embodiment, the surface of the dust collecting electrode plate 31 is provided with a plurality of micro pits 311, which greatly increases the adsorption area of the dust collecting electrode plate 31, so that the dust removal effect of the device on the dust in the flue gas is greatly improved.
[0022] In addition, the surface of the traditional dust collecting electrode plate 31 is not concave, so when the flue gas blows along the flat surface of the dust collecting electrode plate 31, the dust already attached to the surface of the dust collecting electrode plate 31 is easy to be blown by the flue gas, thereby falling off from the surface of the dust collecting electrode plate 31, and then the falling dust reenters the flowing flue gas, thereby causing secondary dust raising. In the embodiment, the surface of the dust collecting electrode plate 31 is arrayed with a plurality of micro pits 311. When the flue gas blows along the surface of the dust collecting electrode plate 31 in the embodiment, since the inner wall of the blocking edge 312 close to the side of the micro pit 311 is almost perpendicular to the surface of the dust collecting electrode plate 31, when the high-speed flue gas flows along the surface of the dust collecting electrode plate 31, the flue gas flows along the blocking edge 312. Due to the arrangement of the blocking edge 312, the micro pit 311 is almost 90 degrees sunken relative to the flue gas. Since the flue gas has forward inertia momentum, the flue gas will not enter the micro pit 311, but directly fly over the micro pit 311. We call the airflow directly flying over the micro pit 311 as free shear layer. When the free shear layer flies over the micro pit 311, the free shear layer will drive the air in the micro pit 311 to rotate by the friction between gas molecules, so the micro pit 311 deforms a micro cyclone which keeps rotating. We call this micro cyclone as standing vortex. The standing vortex is locked in the micro pit 311 and cannot escape from the micro pit 311. Although the gas in the pit is rotating, the air flow rate at the bottom of the pit is relatively slow, and even the gas does not flow. Therefore, when the dust particles enter the micro pit 311, the dust particles will be rolled to the bottom of the micro pit 311 by the standing vortex, so the external flue gas is difficult to take out the dust at the bottom of the micro pit 311, thereby avoiding the secondary dust raising.
[0023] When the rapping and dust cleaning assembly 5 knocks the dust collection electrode plate 31, the dust in the micro-pit 311 of the dust collection electrode plate 31 will move to the outside of the micro-pit 311 due to vibration. Due to the effect of the free shear layer, it is still difficult for the dust in the micro-pit 311 to slide out. Then the micro-pit 311 of the embodiment further includes a guide slope 313 located on the downstream side of the airflow. The guide slope 313 can be regarded as a notch of the micro-pit 311. When the dust in the micro-pit 311 slides to the guide slope 313 due to shaking, since the guide slope 313 is arranged downwardly inclined close to the direction of the guide groove 314 located on the downstream side of the airflow, the dust in the guide slope 313 will slide into the guide groove 314 under the action of the gravity vector. Then the dust is settled in the collection hopper 13 through the guide groove 314. The depth of the guide groove 314 in the embodiment is much greater than the depth of the micro-pit 311. Therefore, the gas inside the guide groove 314 is relatively still. When the dust flows into the guide groove 314 from the guide slope 313, the dust can stably sink to the inside of the collection hopper 13 under the action of gravity. In the conventional technology, the dust freely falls and settles along the smooth outer wall of the electrode plate. The dust is still exposed to the flue gas with relatively high flow rate, and the dust is easily swept away, thereby causing secondary dust raising. In the embodiment, the guide groove 314 provides a relatively still gas environment for the dust settling, which greatly reduces the probability of the dust being raised again by the flue gas during the settling process, thereby greatly reducing the probability of secondary dust raising of the device. At the same time, the guide slope in the embodiment is arranged downwardly inclined close to the direction of the guide groove 314 located on the downstream side of the airflow. Therefore, the dust in the guide slope 313 not only receives the gravity vector, but also receives the thrust vector of the gas flow due to the included angle between the dust and the flow direction of the flue gas, and the dust is in the downstream direction. Under the double actions of gravity and wind force, the dust in the guide slope 313 can relatively quickly fall into the guide groove 314, thereby reducing the time of the dust in the settling state exposed to the high-speed airflow environment, and further reducing the probability of secondary dust raising.
[0024] Reference is made to Figure 5The cross section of the flow guide groove 314 in the embodiment is in the shape of Ω, and the opening width of the flow guide groove 314 in the embodiment is smaller than the opening diameter of the micro-pit 311. The design of the Ω-shaped flow guide groove 314 makes the opening area of the flow guide groove 314 small, so that the high-speed airflow is difficult to enter the flow guide groove 314 from the opening of the flow guide groove 314, thereby further ensuring the stability of the gas in the flow guide groove 314, and further ensuring that the dust can stably settle in the flow guide groove 314 and further avoiding the occurrence of secondary dust raising. The design of the Ω-shaped flow guide groove 314 can maximize the internal space of the flow guide groove 314. The larger the internal space of the flow guide groove 314, the less likely the dust is to accumulate and block in the flow guide groove 314, thereby maximizing the normal settlement of the dust in the flow guide groove 314.
[0025] In addition, with reference to Figure 7 In the embodiment, the bottom of the flow guide groove 314 is provided with a flutter film assembly 4 for improving the flowability of the dust. The flutter film assembly 4 in the embodiment includes a high-temperature-resistant metal film strip 41. The metal film strip 41 in the embodiment is made of S310 stainless steel, which has good elasticity. The length of the metal film strip 41 in the embodiment is longer than the longest diameter of the cross section of the flow guide groove 314. The two ends of the metal film strip 41 are respectively fixedly installed in the groove wall of the flow guide groove 314, and the middle part of the metal film strip 41 is naturally suspended due to the length and the action of gravity.
[0026] After the flow guide groove 314 works for a long time, dust is likely to be hardened in the flow guide groove 314. In the embodiment, the bottom of the flow guide groove 314 is provided with the metal film strip 41. Therefore, when the rapping and dust cleaning assembly 5 knocks the dust collection electrode plate 31, the vibration wave in the dust collection electrode plate 31 is also transmitted to the metal film strip 41. Since the metal film strip 41 has small mass and rigidity, the metal film strip 41 can generate high-frequency and small-amplitude vibration. The high-frequency vibration breaks the hardened dust in the flow guide groove 314 into small pieces or particles, so that the dust can smoothly settle in the flow guide groove 314.
[0027] In addition, the inner surface of the micro-pit 311 and the groove wall of the flow guide groove 314 in the embodiment are provided with a hydrophobic and oleophobic coating. The coating in the embodiment is polytetrafluoroethylene, which has strong hydrophobicity and oleophobicity. Therefore, even if the dust particles adhere to water or oil, the dust can normally slide into the flow guide groove 314 from the micro-pit 311 and normally settle in the flow guide groove 314.
[0028] With reference to Figure 4 and Figure 7 The rapping and dust cleaning assembly 5 in the embodiment includes a connecting rod 51, a driving rod 52, a connecting block 53, a rapping block 54, and a driving motor 55.
[0029] The connecting rods 51 in the embodiment are located at the side edges of the plurality of dust collecting electrode plates 31, are arranged in a direction perpendicular to the dust collecting electrode plates 31, and are fixedly connected to the side walls of all the dust collecting electrode plates 31. The driving rods 52 are arranged in parallel with the connecting rods 51, both ends of the driving rods 52 are rotationally connected to the inner walls of the shell 1, the driving motor 55 is fixedly installed on the shell 1, and the output shaft of the driving motor 55 is coaxially and fixedly connected to the driving rod 52. The connecting blocks 53 and the beating blocks 54 in the embodiment are both provided with a plurality of connecting blocks 53 and a plurality of beating blocks 54 in one-to-one correspondence. One end of the connecting block 53 is fixedly connected to the outer peripheral wall of the driving rod 52, and the beating block 54 is hingedly connected to the end of the connecting block 53 away from the driving rod 52.
[0030] When the equipment is started, the driving motor 55 is also started, the driving motor 55 drives the driving rod 52 to rotate, the driving rod 52 drives the connecting block 53 and the beating block 54 to move upwards, the beating block 54 does not contact the connecting rod 51, and when the beating block 54 moves to the highest point, with the continuous rotation of the driving rod 52, the beating block rapidly descends due to the action of gravity and relatively rotates with the connecting block 53. The beating block collides with the connecting rod 51 in the process of rapid descent, and the connecting rod 51 is connected to all the dust collecting electrode plates 31. Therefore, the collision of the beating block drives the vibration of all the dust collecting electrode plates 31, and then with the continuous rotation of the driving rod 52, the beating block 54 relatively rotates and folds with the connecting block 53, so that the beating block 54 slides from above the connecting rod 51, and sequentially circulates, thereby realizing the periodic knocking of the dust collecting electrode plates 31 and the periodic vibration of the dust collecting electrode plates 31.
[0031] In the embodiment, the connecting rod 51 is arranged on the side wall of the dust collecting electrode plate 31, so when the beating block 54 knocks the connecting rod 51, the vibration direction of all the dust collecting electrode plates 31 is the same as the direction of the flue gas flow, so the vibration direction can provide the maximum transverse inertia component of the dust in the spoon-shaped micro-pit 311 to the guide groove 314, the transverse force is highly coincident with the extension direction of the guide slope 313 of the pit, and the dust can be directly thrown into the guide groove 314 relatively efficiently, thereby further accelerating the speed of the dust into the guide groove 314 and further improving the dust removal efficiency.
[0032] The implementation principle of the dust capturing and purifying device for cement kiln head exhaust gas in the embodiment is as follows: when the dust-containing exhaust gas enters the inside of the shell 1 from the smoke inlet 11 and passes through two adjacent dust collecting plates 31, the block 312 in the spoon-shaped micro-pit 311 at the upstream of the gas flow forces the gas flow boundary layer to separate and jump over the micro-pit 311, and a closed low-speed stationary vortex is formed in the micro-pit 311, so as to lock the dust firmly inside the pit bottom; when the dust is cleaned, the dust is given a transverse inertia force by the lateral shearing vibration, so as to slide out along the guide slope 313 at the downstream of the gas flow in the micro-pit 311, and the dust is subjected to the comprehensive external force of gravity and gas flow thrust, so as to slide into the Ω-shaped guide groove 314 at the downstream of the gas flow in a relatively short time; after the dust enters the guide groove 314, the dust falls on the suspended metal film strip 41 at the bottom of the groove, the film is excited to generate high-frequency vibration by low-frequency vibration, so as to make the dust quickly discharged into the collecting hopper 13, and the whole process avoids the situation that the dust returns to the high-speed flowing flue gas, so as to improve the dust capturing and collecting effect of the device on the flue gas.
[0033] The embodiments of the specific implementation are the preferred embodiments of the application, and are not intended to limit the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.
Claims
1. A dust capturing and purifying device for cement kiln head exhaust gas, comprising a shell (1), a discharge electrode assembly (2) and a dust collecting electrode assembly (3) arranged in the shell (1), and a rapping and dust cleaning assembly (5), characterized in that, The dust collecting electrode system comprises a plurality of dust collecting electrode plates (31) arranged in parallel, the surface of the dust collecting electrode plate (31) is provided with a plurality of longitudinal through flow guide grooves (314) arranged at intervals along the direction of the airflow, and an array of micro-pits (311) is arranged on the plate surface between two adjacent flow guide grooves (314), the array of micro-pits (311) is used for trapping dust, the depth of the flow guide groove (314) is greater than the depth of the micro-pit (311), and when the dust in the micro-pit (311) is detached under the action of vibration, it can flow along the surface of the electrode plate into the flow guide groove (314) located on the downstream side of the micro-pit (311) along the direction of the airflow and settle.
2. A device for capturing and cleaning dust from exhaust gas of a cement kiln head according to claim 1, characterized in that, The micro-pit (311) is a non-symmetrical spoon-shaped structure, which comprises a blocking edge (312) located on the upstream side of the airflow, and a guide slope (313) located on the downstream side of the airflow, the blocking edge (312) is used to force the horizontal airflow to separate to pass over the opening of the micro-pit (311), and the guide slope (313) extends downwardly along the surface of the electrode plate and points to the adjacent flow guide groove (314) located on the downstream side of the micro-pit (311) in the airflow.
3. A device for capturing and cleaning dust from exhaust gas of a cement kiln head according to claim 2, characterized in that, The width of the flow guide groove (314) is less than the opening diameter of the micro-pit (311).
4. A device for capturing and cleaning dust from exhaust gas of a cement kiln head according to claim 1, characterized in that, The cross section of the flow guide groove (314) is Ω-shaped, and the bottom of the flow guide groove (314) is provided with a fluttering film assembly (4) for improving the flowability of dust.
5. A device for capturing and cleaning dust from exhaust gas of a cement kiln head according to claim 1, characterized in that, The fluttering film assembly (4) comprises a high-temperature-resistant metal film strip (41), and the metal film strip (41) is suspended at the groove bottom opening of the flow guide groove (314).
6. A device for capturing and cleaning dust from exhaust gas of a cement kiln head according to claim 1, characterized in that, The inner surface of the micro-pit (311) is provided with a hydrophobic and oleophobic coating.
7. A device for capturing and cleaning dust from exhaust gas of a cement kiln head according to claim 1, characterized in that, The vibration and dust removal assembly (5) is configured to generate lateral shear vibration, the direction of the shear vibration is perpendicular to the extension direction of the flow guide groove (314), so as to promote the transverse sliding of dust from the micro-pit (311) to the flow guide groove (314).