Electrostatic precipitator and method of controlling the same

Abstract

The application relates to an electrostatic dust collector and a control method thereof, and relates to the technical field of electrostatic dust removal. The electrostatic dust collector comprises a shell, the shell is provided with an air inlet and an air outlet on both sides along the length direction of the shell; a plurality of dust removal units are arranged in the shell and are sequentially arranged along the length direction of the shell; the dust removal unit comprises a plurality of discharge flat shelves, the plurality of discharge flat shelves are sequentially and parallelly arranged in the width direction of the shell; a dust collecting plate is arranged between the two adjacent discharge flat shelves, the dust collecting plate is parallelly and spacedly arranged with the discharge flat shelves, and a single dust removal flow channel is formed between the two adjacent dust collecting plates; a through hole is sequentially and penetratingly arranged on the dust collecting plate, the through hole is connected with the two adjacent single dust removal flow channels; and a flow guide plate is arranged between the two adjacent dust collecting plates, and the flow guide plate is used for guiding the dust-containing airflow entering the single dust removal flow channel to pass through the corresponding dust collecting plate. The application can improve the electrostatic driving force acting on the dust particles and improve the electrostatic dust removal effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrostatic precipitation, in particular to an electrostatic precipitator and a control method thereof. BACKGROUND

[0002] The electrostatic precipitator is a common dust treatment equipment, which is often used to treat the dust generated in the daily production of energy industry enterprises such as thermal power plants. The working principle of the electrostatic precipitator is to make the dust-containing gas ionize by using high-voltage electrostatic field, so that the dust in the dust-containing gas is separated from the gas under the action of the electric field. The dust combines with the negative ions generated by the discharge electrode in the electrostatic precipitator to be negatively charged. The negatively charged dust moves to the dust collecting electrode in the electrostatic precipitator under the action of the electric field force, and is finally adsorbed on the surface of the dust collecting electrode, so as to achieve the purpose of adsorbing and removing dust.

[0003] At present, the existing electrostatic precipitator mainly includes a shell, a plurality of dust collecting plates are arranged in the shell and parallel to each other, and a plurality of discharge electrodes are arranged between adjacent dust collecting plates, so as to form a dust removal channel between adjacent dust collecting plates. When the dust-containing gas flow passes through the dust removal channel, high-voltage negative electricity is applied to the discharge electrode to make the discharge electrode produce corona discharge, so that the dust particles in the dust-containing gas flow are charged. The charged dust particles are removed transversely in the dust removal channel under the action of the electric field force, and are finally adsorbed on the surface of the dust collecting plate.

[0004] According to the related technology in the above, since the existing dust removal channel is relatively wide, the charged dust particles in the dust removal channel need to migrate a long distance to reach the surface of the dust collecting plate, and then be adsorbed by the dust collecting plate. According to Coulomb's law, the electric field force is inversely proportional to the square of the distance. Such a long migration distance results in relatively weak electrostatic driving force acting on the dust particles. When treating dust with small particle size, small inertia or high specific resistance, the driving force is often difficult to effectively overcome the viscous resistance of the dust-containing gas flow, resulting in low collection efficiency, and further affecting the electrostatic precipitation effect. SUMMARY

[0005] The present application provides an electrostatic precipitator and a control method thereof, which aims to shorten the adsorption distance of the dust particles to enhance the electric field force, so as to increase the electrostatic driving force acting on the dust particles and improve the electrostatic precipitation effect.

[0006] In a first aspect, the electrostatic precipitator provided by the present application adopts the following technical scheme:

[0007] An electrostatic precipitator comprises a housing, the housing is provided with an air inlet and an air outlet on both sides along the length direction of the housing respectively; a plurality of dust removal units are arranged in the housing, the plurality of dust removal units are arranged in sequence along the length direction of the housing; the dust removal unit comprises a plurality of discharge shelves, the plurality of discharge shelves are arranged in parallel and spaced apart along the width direction of the housing; a dust collecting plate is arranged between two adjacent discharge shelves, the dust collecting plate is arranged in parallel and spaced apart with the discharge shelves, and a single dust removal flow channel is formed between two adjacent dust collecting plates; a through hole is formed through the dust collecting plate, the through hole is connected with the two adjacent single dust removal flow channels; a flow guide plate is arranged between two adjacent dust collecting plates, and the flow guide plate is used for guiding the dust-containing airflow entering the single dust removal flow channel to pass through the corresponding dust collecting plate.

[0008] By adopting the above technical scheme, under the design of a plurality of dust collecting plates in the dust removal unit, a plurality of parallel single dust removal flow channels are formed, and a flow guide plate is arranged in the single dust removal flow channel. Under the guidance of the flow guide plate, the dust-containing airflow entering the single dust removal flow channel moves close to the dust collecting plate until passing through the corresponding dust collecting plate. This makes the dust-containing airflow in the single dust removal flow channel flow in a serpentine shape.

[0009] Under such a design, on the one hand, the effect of the flow guide plate makes the dust-containing airflow close to the dust collecting plate, thereby shortening the distance between the dust particles in the dust-containing airflow and the dust collecting plate. Therefore, according to Coulomb's law, the effect of the electric field force is inversely proportional to the square of the distance, and the sharp shortening of the adsorption distance can enhance the electrostatic driving force acting on the dust particles, which can improve the dust collecting capacity of the dust collecting plate and further improve the electrostatic dust removal effect. On the other hand, the dust-containing airflow passes through the dust collecting plate in a serpentine path, which makes the actual movement path of the dust-containing airflow in the dust removal unit much longer than the straight line length of the dust removal unit, thereby increasing the residence time of the dust particles in the electrostatic precipitator, which can further improve the dust collecting capacity of the single dust collecting plate and further improve the electrostatic dust removal effect.

[0010] Optionally, the single dust removal flow channels in two adjacent dust removal units are arranged one by one in correspondence, and the two corresponding single dust removal flow channels are connected in sequence along the length direction of the housing.

[0011] By adopting the above technical scheme, since the corresponding single dust removal flow channels in two adjacent dust removal units are connected in sequence, the series connection of a plurality of dust removal units is realized, thereby enabling multi-stage dust removal of the dust-containing airflow, which can further improve the dust removal effect.

[0012] Optionally, the dust collecting plate comprises a plurality of first plates and a plurality of second plates, the plurality of second plates and the plurality of first plates are sequentially staggered along the length direction of the shell, two adjacent second plates are arranged in parallel and spaced apart, and two adjacent first plates are arranged in parallel; the opposite sides of the second plate are connected with the corresponding adjacent first plates, the second plate and the adjacent first plate are arranged in a V shape, and the through hole is formed on the first plate or the second plate.

[0013] By adopting the above technical scheme, the dust collecting plate is designed by cooperating the plurality of first plates and the plurality of second plates, and the through hole is formed on the first plate or the second plate, which forms a permeable anode plate, so that the dust-containing airflow can flow through the through hole on the dust collecting plate in a snakelike manner, thereby meeting the function of the dust collecting plate. Since the through hole is formed on the first plate or the second plate, the axial direction of the through hole can be different, so that the through hole has the effect of guiding the dust-containing airflow and hindering the dust-containing airflow from passing through. Therefore, by adjusting the installation direction of the dust collecting plate, the dust-containing airflow can be made to flow along the corresponding path.

[0014] Optionally, the through holes on one dust collecting plate are formed on the first plate, and the through holes on the adjacent dust collecting plate are formed on the second plate.

[0015] By adopting the above technical scheme, the through holes between the two adjacent dust collecting plates are sequentially staggered in direction, and under the cooperation of the corresponding flow guide plate, the dust-containing airflow can be forced to form a more tortuous and stable snakelike path in each dust removal unit and between the plurality of dust removal units, so that the dust-containing airflow can fully contact each dust collecting plate surface, and the dust removal efficiency caused by the shortcut of the dust-containing airflow is avoided.

[0016] Optionally, one end of the single dust removal flow channel facing the air inlet is an inlet, and the flow guide plate is located at the inlet of the corresponding single dust removal flow channel.

[0017] By adopting the above technical scheme, the flow guide plate is arranged at the inlet of each single dust removal flow channel, so that the dust-containing airflow can be regularized and guided at the first time when the dust-containing airflow enters the single dust removal flow channel, thereby ensuring that the dust-containing airflow moves along the corresponding path after entering the corresponding single dust removal flow channel, which maximizes the length of the single dust removal flow channel for efficient dust removal.

[0018] Optionally, the flow guide plate comprises a V-shaped guide plate and a flow channel baffle, the V-shaped guide plate or the flow channel baffle is arranged at the inlet of the corresponding single dust removal flow channel; only one V-shaped guide plate or one flow channel baffle is arranged in each single dust removal flow channel, the V-shaped guide plate is arranged in one single dust removal flow channel, and the flow channel baffle is arranged in the adjacent single dust removal flow channel.

[0019] By adopting the technical scheme, the guide plate can guide the dust-containing airflow to move by the setting of the V-shaped guide plate, and the flow passage baffle can block the flow of the dust-containing airflow. When the dust-containing airflow impacts on the flow passage baffle, the Karman vortex street effect is generated to promote the collision and agglomeration of the fine dust particles in the dust-containing airflow. By interlacing the guide plates with different functions, the flow field in the dust removal unit can be effectively controlled, the distribution of dynamic pressure and static pressure is optimized, the dust-containing gas can fully flow through the dust collection plate, and the stable flow field of the guided airflow for the serpentine wall-attached motion is formed by the joint action, so that the effects of shortening the dust adsorption distance, prolonging the dust residence time, promoting the dust particle agglomeration and other dust removal strengthening effects are achieved.

[0020] Optionally, the dust removal device further comprises a rapping unit and a plurality of dust collection hoppers. The rapping unit is arranged on the shell. The dust collection hoppers are arranged below the shell and communicate with the shell. The dust collection hoppers are arranged one-to-one with the dust removal units and are located directly below the corresponding dust removal units.

[0021] By adopting the technical scheme, the dust adsorbed on the dust collection plate can be removed and collected by the cooperation of the rapping unit and the plurality of dust collection hoppers, so that the long-term and stable operation of the electrostatic precipitator is ensured.

[0022] During the operation of the rapping unit, even if a small amount of dust escapes, it will also enter other dust removal units with the dust-containing airflow. Therefore, after the escaped dust enters other dust removal units, the corona discharge also exists in the dust removal units. The escaped dust particles will be recharged and captured and adsorbed by the dust collection plates in the dust removal units. This process ensures the effective control of the rapping escaped dust and effectively inhibits the secondary dust raising.

[0023] Optionally, the dust removal unit further comprises a fixed frame. The dust collection plate, the discharge flat frame and the guide plate are arranged in the corresponding fixed frame. The fixed frame is detachably connected with the shell.

[0024] By adopting the technical scheme, the dust removal unit can be detached or installed from the corresponding shell as a whole by the design of the fixed frame, so that the replacement and maintenance of the dust removal unit are facilitated.

[0025] Optionally, the shell comprises an air inlet section, an air outlet section, and a plurality of intermediate rings, the air inlet is arranged on the air inlet section, the air outlet is arranged on the air outlet section, the plurality of intermediate rings are arranged between the air inlet section and the air outlet section, the intermediate rings are arranged along the spacing direction of the air inlet section and the air outlet section in the axial direction, and the intermediate rings are sequentially arranged along the axial direction of the intermediate rings, and the two ends of the intermediate ring in the axial direction are respectively detachably connected with the corresponding adjacent intermediate ring or the air inlet section or the air outlet section; the intermediate ring is arranged in one-to-one correspondence with the dust removal unit, the fixed frame is arranged in the corresponding intermediate ring, and the fixed frame is detachably connected with the corresponding intermediate ring.

[0026] By adopting the above technical scheme, based on the structural design of the shell, the total length of the electrostatic precipitator can be flexibly adjusted by increasing the number of intermediate rings. Since the dust removal units are installed in the intermediate rings, the number of dust removal units can also be adjusted by increasing or decreasing the number of intermediate rings, which enables the electrostatic precipitator to increase or decrease the number of intermediate rings and dust removal units according to different use requirements, thereby improving the applicability and flexibility of the electrostatic precipitator.

[0027] In a second aspect, the control method of the electrostatic precipitator provided by the present application adopts the following technical scheme:

[0028] A control method of an electrostatic precipitator, for controlling the above-mentioned electrostatic precipitator, comprising the following steps: detecting the dust concentration of the air outlet of the electrostatic precipitator in real time; increasing or decreasing the electric field intensity of each dust removal unit according to the dust concentration of the air outlet; repeating the above steps until the dust concentration of the air outlet returns to the preset range.

[0029] By adopting the above technical scheme, the control method establishes a closed-loop feedback control system. By monitoring the dust concentration of the air outlet in real time as the final effect index, and adjusting the electric field intensity of the front-end dust removal units in the reverse direction based on this, the electrostatic precipitator can automatically adapt to the dust concentration of the air inlet, so that the dust concentration of the air outlet is always maintained within the standard range, thereby ensuring the stability of the electrostatic precipitation effect.

[0030] In summary, the present application has the following at least one beneficial technical effect:

[0031] 1. The present application improves the electrostatic precipitation effect by the structural design of the dust removal unit, so that the dust-containing gas flow flows close to the dust collection plate, thereby shortening the distance between the dust particles in the dust-containing gas flow and the dust collection plate, and enhancing the electrostatic driving force acting on the dust particles, which can improve the dust collection capacity of the dust collection plate, and further improve the electrostatic precipitation effect.

[0032] 2. The application cooperates with several dust removal units to make the dust-containing airflow flow through several dust collection plates in a zigzag manner in the electrostatic precipitator, thereby increasing the residence time of dust particles in the electrostatic precipitator, which can further improve the dust particle capture capacity of the electrostatic precipitator and improve the electrostatic dust removal effect.

[0033] 3. The application can effectively control the flow field in the dust removal unit by staggering the V-shaped guide plate and the flow channel baffle, optimize the distribution of dynamic pressure and static pressure, make the dust-containing gas flow through the dust collection plate fully, and jointly form a stable flow field for guiding the airflow to move in a zigzag manner, thereby achieving the effects of shortening the dust adsorption distance, prolonging the dust residence time, promoting the agglomeration of dust particles, and other dust removal enhancement effects. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the overall structure schematic diagram of the electrostatic precipitator of embodiment 1 of the application.

[0035] Figure 2 is the principle schematic diagram of the electrostatic precipitator of embodiment 1 of the application.

[0036] Figure 3 is the principle schematic diagram of the continuous dust removal flow channel of embodiment 1 of the application.

[0037] Figure 4 is the overall structure schematic diagram of the dust collection plate of embodiment 1 of the application.

[0038] Figure 5 is the overall structure schematic diagram of the electrostatic precipitator of embodiment 2 of the application.

[0039] Figure 6 is the overall structure schematic diagram of the intermediate ring and the corresponding dust removal unit of embodiment 2 of the application.

[0040] Figure 7 is the exploded structure schematic diagram of the intermediate ring of embodiment 2 of the application.

[0041] Figure 8 is the overall structure schematic diagram of the dust removal unit of embodiment 2 of the application.

[0042] Figure 9 is the cross-sectional structure schematic diagram of the dust removal unit of embodiment 2 of the application.

[0043] Figure 10 is the overall structure schematic diagram of the dust removal unit of embodiment 3 of the application.

[0044] Figure 11 is the internal structure schematic diagram of the dust removal unit of embodiment 3 of the application.

[0045] Figure 12is a schematic view of the overall structure of the linear driving member of Embodiment 3 of the present application.

[0046] In the figure, 1, housing; 11, air inlet; 12, air outlet; 13, air inlet section; 14, intermediate ring; 141, plug-in interface; 142, dust outlet; 143, support carriage; 144, sealing plate; 15, air outlet section; 2, dust removal unit; 21, discharge flat; 22, dust collection plate; 221, through hole; 222, first plate; 223, second plate; 23, single dust removal flow channel; 24, flow guide plate; 241, V-shaped guide plate; 242, flow channel baffle; 25, fixed frame; 251, airtight plate; 26, width adjustment driving assembly; 261, linear driving member; 2611, driving seat; 2612, screw rod; 2613, sliding table; 2614, driving motor; 3, continuous dust removal flow channel; 4, dust hopper; 5, rapping unit. DETAILED DESCRIPTION

[0047] The following description will be made in conjunction with the accompanying drawings. Figure 1 - the accompanying drawings Figure 12 The present application will be further described in detail.

[0048] Embodiment 1: An electrostatic precipitator, referring to Figure 1 and Figure 2 , comprising a housing 1, the housing 1 is provided with an air inlet 11 and an air outlet 12 on the opposite sides along the length direction of the housing 1. A plurality of dust removal units 2 are arranged in the housing 1, the plurality of dust removal units 2 are arranged in sequence along the interval direction between the air inlet 11 and the air outlet 12, and the plurality of dust removal units 2 are sequentially communicated.

[0049] After the dust-containing airflow enters the housing 1 through the air inlet 11, the dust-containing airflow sequentially passes through the plurality of dust removal units 2 and is discharged from the air outlet 12, in this process, each dust removal unit 2 performs electrostatic dust removal on the dust-containing airflow, thereby improving the dust removal efficiency.

[0050] Referring to Figure 2 and Figure 3 , the dust removal unit 2 comprises a plurality of discharge flats 21, the discharge flats 21 are vertically arranged, the plurality of discharge flats 21 are arranged in sequence and spaced apart along the width direction of the housing 1, and the adjacent two discharge flats 21 are arranged in parallel and spaced apart.

[0051] Referring to Figure 2 and Figure 3 , the dust collection plate 22 is arranged between the adjacent two discharge flats 21, the dust collection plate 22 is arranged in parallel and spaced apart with the discharge flat 21, and the plurality of dust collection plates 22 are arranged in sequence and spaced apart in parallel along the width direction of the housing 1, thereby forming a single dust removal flow channel 23 between the adjacent two dust collection plates 22.

[0052] Referring to Figure 3 and Figure 4The dust collecting plate 22 is provided with a through hole 221 penetrating through the dust collecting plate 22, and the through hole 221 is communicated with two adjacent single dust removal flow channels 23. A guide plate 24 is arranged in each single dust removal flow channel 23.

[0053] Under the action of the discharge flat frame 21, the dust collecting plate 22 and the guide plate 24, when the dust-containing airflow passes through the corresponding single dust removal flow channel 23, the dust-containing airflow penetrates the dust collecting plate 22 in a serpentine flow mode under the guidance of the guide plate 24. In this process, the movement path of the dust-containing airflow is lengthened, thereby increasing the residence time of the dust in the electric field. Moreover, under the action of the guide plate 24, the wind force of the dust-containing airflow can assist in pushing the charged dust to move towards the dust collecting plate 22, so that the direction of the wind force and the direction of the electric field force tend to be consistent, which can improve the collection efficiency of the dust particles.

[0054] With reference to Figure 2 and Figure 3 In the embodiment, the discharge flat frame 21 and the dust collecting plate 22 are connected to the shell 1 by bolts, and a plurality of cathode wires are arranged in the discharge flat frame 21. The length direction of the cathode wires is arranged in the vertical direction, and the plurality of cathode wires are arranged in the length direction of the shell 1 in sequence and at intervals. Based on the arrangement of the cathode wires, when the electrostatic precipitator is working, a negative high-voltage direct current is applied to the cathode wires to generate corona discharge, so that the dust particles in the dust-containing airflow are charged, thereby meeting the function of the discharge flat frame 21.

[0055] With reference to Figure 2 and Figure 3 In the embodiment, the single dust removal flow channels 23 in the adjacent two dust removal units 2 are communicated one by one, so that a plurality of single dust removal flow channels 23 communicated in sequence form a continuous dust removal flow channel 3. In the shell 1, the plurality of continuous dust removal flow channels 3 are arranged in sequence and at intervals in the width direction of the shell 1, and the air inlet 11, the continuous dust removal flow channel 3 and the air outlet 12 are communicated in sequence. Based on the formation of the continuous dust removal flow channel 3, the dust-containing airflow can flow through all the dust removal units 2 in sequence, thereby realizing multiple dust removal.

[0056] With reference to Figure 2 and Figure 3 Specifically, the dust removal unit 2 in the embodiment is provided with four units in total, so that after the dust-containing airflow enters the corresponding continuous dust removal flow channel 3, the dust-containing airflow will pass through the dust collecting plate 22 once in each dust removal unit 2, so that the dust-containing airflow will pass through the dust collecting plate 22 four times in the corresponding continuous dust removal flow channel 3, thereby further prolonging the residence time of the dust-containing airflow in the electrostatic precipitator and improving the dust removal efficiency.

[0057] With reference to Figure 3 and Figure 4The dust collecting plate 22 comprises a plurality of first plates 222 and a plurality of second plates 223, the length directions of the first plates 222 and the second plates 223 are arranged in vertical directions, the plurality of second plates 223 and the plurality of first plates 222 are arranged in turn and staggered along the length direction of the shell 1, and the second plates 223 are connected with the corresponding first plates 222 on both sides along the width direction of the second plates 223 respectively, the first plates 222 are connected with the corresponding second plates 223 on both sides along the width direction of the first plates 222 respectively, the second plates 223 and the adjacent first plates 222 are arranged in a V shape, the adjacent two second plates 223 are arranged in parallel and spaced, the adjacent two first plates 222 are arranged in parallel and spaced, and the through holes 221 are arranged through the first plates 222 or the second plates 223.

[0058] Based on the structural design of the dust collecting plate 22, under the action of the through holes 221, the dust collecting plate 22 forms a kind of permeable anode plate, which changes the closed structure of the dust collecting plate 22 in the existing electrostatic precipitator, and skillfully increases the flow area of the dust-containing gas stream, thereby effectively reducing the flow rate of the dust-containing gas stream flowing through the dust collecting plate 22.

[0059] Specifically, the principle of reducing the flow rate of the dust-containing gas stream is based on the continuity equation in fluid mechanics That is, under the premise that the total flue gas treatment capacity Q is constant, the gas flow velocity v is inversely proportional to the effective flow area A. In the design of the existing closed dust collecting plate 22, the dust-containing gas stream can only flow in the narrow passages between the dust collecting plates 22, and the flow area A is limited to the sum of the areas of each narrow passage. The structure of the dust collecting plate 22 of the embodiment makes the dust-containing gas stream penetrate the dust collecting plate 22 in a serpentine path, which makes the available effective flow area not the narrow passages between the dust collecting plates 22, but the entire windward area of the dust collecting plate 22, that is, the plurality of first plates 222 or the plurality of second plates 223 with the through holes 221, thereby increasing the flow area of the dust-containing gas stream. In theory, this design can increase the flow area width by 2.5 times. Therefore, under the condition that the total flue gas flow Q is constant, the significant increase in the flow area A must lead to a significant reduction in the gas flow velocity v.

[0060] In fact, compared with the flow rate of about 1.0 m / s of the dust-containing gas stream in the conventional electrostatic precipitator, the flow rate of the dust-containing gas stream can be reduced to 0.3-0.6 m / s.

[0061] On this basis, according to the electrostatic precipitation efficiency formula ; wherein η represents the dust removal efficiency, w represents the approach velocity, A represents the dust collecting area, and Q represents the actual flow rate of the dust-containing gas stream. Due to the reduction of the flow rate of the dust-containing gas stream and the change of the flow path, the dust collecting area increases while the actual flow rate of the dust-containing gas stream decreases, and then the A / Q value of the dust collecting area increases, which can significantly improve the dust removal efficiency.

[0062] Referring toFigure 3 and Figure 4 In this embodiment, the through hole 221 on one of the two adjacent dust collecting plates 22 in the same dust removal unit 2 and the two adjacent dust collecting plates 22 along the length direction of the shell 1 is arranged on the second plate 223, and the through hole 221 on the adjacent dust collecting plate is arranged through the first plate 222.

[0063] Specifically, in actual use, the first plate 222 and the second plate 223 have the same structure, and when it is necessary to adjust the orientation of the through hole 221 on the dust collecting plate 22, it is only necessary to flip and adjust the position of the dust collecting plate 22, without the need to produce two kinds of dust collecting plates 22. The above description is only for the purpose of clear description.

[0064] Referring to Figure 2 and Figure 3 In this embodiment, the single dust removal flow channel 23 is arranged along the length direction of the shell 1, and one end of the single dust removal flow channel 23 towards the air inlet 11 is the inlet, and the other end is the outlet. The flow guide plate 24 includes a V-shaped guide plate 241 and a flow channel baffle 242, the V-shaped guide plate 241 or the flow channel baffle 242 is located at the inlet of the single dust removal flow channel 23, and only one V-shaped guide plate 241 or flow channel baffle 242 is arranged in each single dust removal flow channel 23, and the V-shaped guide plate 241 is arranged in one single dust removal flow channel 23, and the flow channel baffle 242 is arranged in the adjacent single dust removal flow channel 23.

[0065] Therefore, in one dust removal unit 2, a plurality of V-shaped guide plates 241 and a plurality of flow channel baffles 242 are arranged in the width direction of the shell 1; in the same continuous dust removal flow channel 3, a plurality of V-shaped guide plates 241 and a plurality of flow channel baffles 242 are arranged in the length direction of the shell 1.

[0066] Referring to Figure 2 and Figure 3 The V-shaped guide plate 241 includes two inclined plates, the length direction of the inclined plate is arranged in the vertical direction, and the length direction of the inclined plate is fixedly connected with the shell 1. The two inclined plates are arranged in the width direction of the shell 1, and one inclined plate extends in the direction of the air inlet 11 on the side close to the adjacent inclined plate, and the other side extends in the direction of the air outlet 12. Therefore, the two inclined plates are arranged in a V shape, which can meet the function of guiding the dust-containing airflow to penetrate the corresponding dust collecting plate 22.

[0067] The design of the V-shaped guide plate 241 can guide the dust-containing airflow to be close to the corresponding dust collection plate 22 when the dust-containing airflow enters the corresponding single dust removal flow channel 23, so that the maximum distance of the charged dust particles reaching the dust collection plate 22 is greatly shortened from the conventional 200-225 mm to about 20 mm. According to Coulomb's law, the reduction of the adsorption distance can increase the electrostatic attraction force, thereby effectively capturing various dust particles including high specific resistance.

[0068] In addition, under the action of the V-shaped guide plate 241, the dust-containing airflow can pass through the corresponding dust collection plate 22, thereby further shortening the distance of the charged dust particles reaching the dust collection plate 22, and further improving the dust collection capacity of the dust collection plate 22. Moreover, this can prolong the movement path of the dust-containing airflow, prolong the contact time of the dust-containing airflow with the dust collection plate 22, and improve the dust collection amount.

[0069] Referring to Figure 2 and Figure 3 , the flow channel baffle 242 is semicircular, and the middle part of the flow channel baffle 242 protrudes towards the air inlet 11 along the shell 1.

[0070] The design of the flow channel baffle 242 can cause local turbulent flow and Karman vortex street effect behind the flow channel baffle 242 when the dust-containing airflow contacts the corresponding flow channel baffle 242, thereby increasing the collision probability between fine particle dusts in the dust-containing airflow, and further causing the fine particle dusts to easily agglomerate into larger particles, which are more easily captured by the dust collection plate.

[0071] Referring to Figure 2 and Figure 3 , under the cooperation of the V-shaped guide plate 241 and the flow channel baffle 242, the flow field in the electrostatic precipitator can be effectively controlled, the distribution of dynamic pressure and static pressure is optimized, the dust-containing gas can fully flow through the dust collection plate 22, and a stable flow field for guiding the dust-containing airflow to move in a snake shape close to the wall is formed, thereby achieving the effects of shortening the dust adsorption distance, prolonging the dust residence time, promoting the agglomeration of dust particles, and the like.

[0072] Referring to Figure 1 and Figure 2 , the bottom of the shell 1 is provided with a plurality of dust collection hoppers 4, the dust collection hoppers 4 are in communication with the shell 1, and the dust collection hoppers 4 are arranged one by one corresponding to the dust removal units 2, and the dust collection hoppers 4 are located directly below the corresponding dust removal units 2.

[0073] Referring to Figure 1 , the shell 1 is further provided with a rapping unit 5, the rapping unit 5 is installed on or directly contacts the shell 1, and the rapping unit 5 can adopt an electromagnetic pulse rapping device or a flexible arm hammer rapping device or a pneumatic rapping device.

[0074] When the dust on the dust collecting plate 22 accumulates to a certain thickness, the dust falling unit 5 is started to vibrate the dust to fall into the dust hopper 4 below.

[0075] Referring to Figure 1 and Figure 2 In this process, first, because the flue gas flow rate in the dust collection area is greatly reduced to 0.3-0.6 m / s, the dust shaken down is not easy to be taken up by the airflow again; second, even if a small amount of dust escapes, it will enter other dust removal units 2 with the dust-containing airflow, so that after the escaped dust enters other dust removal units 2, there is also corona discharge in the dust removal unit 2, and the escaped dust particles will be recharged and captured and adsorbed by the dust collecting plate 22 in the dust removal unit 2, which ensures effective control of the vibration escaped dust and effectively inhibits secondary dust raising.

[0076] The implementation principle of the embodiment of the present application is that when electrostatic precipitation is performed, the dust-containing airflow enters the shell 1 from the air inlet 11 and is discharged from the air outlet 12 after passing through a plurality of dust removal units 2 in turn.

[0077] In the process of the dust-containing airflow passing through a dust removal unit 2, under the action of high-voltage corona generated by the cathode wire of the discharge flat frame 21, the dust particles in the dust-containing airflow are rapidly ionized and charged with negative charges. Subsequently, the charged dust-containing airflow passes through the corresponding dust collecting plate 22 in a serpentine path under the guidance of the V-shaped guide plate 241 and the flow channel baffle 242. Moreover, in the flow process of the dust-containing airflow, the V-shaped guide plate 241 guides the dust-containing airflow to flow close to the corresponding dust collecting plate 22; and the flow channel baffle 242 causes the flowing dust-containing airflow to generate local turbulent flow and Karman vortex street effect.

[0078] Therefore, after the dust-containing airflow passes through a plurality of dust removal units 2 in turn, the above dust removal process is repeated, so that a highly clean airflow is discharged from the air outlet 12.

[0079] The embodiment also discloses a control method of the electrostatic precipitator, which comprises the following steps:

[0080] S1, establishing an electrostatic precipitator model, setting a real-time data acquisition network on the electrostatic precipitator model, and establishing a dust removal digital model according to the data collected by the real-time data acquisition network.

[0081] Specifically, the following steps are included:

[0082] S11, real-time data acquisition network deployment: a plurality of sensors are installed in the air inlet 11, the air outlet 12 and each dust removal unit 2 of the electrostatic precipitator model, and communication is established between the upper computer and each sensor to build a real-time data acquisition network.

[0083] In this embodiment, the sensors in each dust removal unit 2 include at least dust concentration sensors, electric field intensity sensors, and temperature sensors, so that the dust concentration, electric field intensity, and temperature in the corresponding dust removal unit 2 can be monitored in real time. The sensors arranged at the air inlet 11 and the air outlet 12 include at least dust concentration sensors, so that the dust concentration in the corresponding air flow can be monitored in real time. Therefore, the real-time data network can collect the electric field intensity, temperature, unit load, and other working condition information in each dust removal unit 2, as well as the dust concentration at the air inlet 11 and the air outlet 12.

[0084] S12, dust removal digital model training: according to the data collected by the real-time data acquisition network, an emission index prediction model and an operation cost prediction model are respectively constructed.

[0085] The emission index prediction model: using long short-term memory network (LSTM) or other deep learning algorithms, the relationship between the working condition parameters in the electrostatic precipitator and the dust concentration at the air outlet 12 is established, and a model capable of predicting the final dust concentration at the air outlet 12 according to the working condition parameters is established according to a large amount of data obtained by the real-time data acquisition network.

[0086] The operation cost prediction model: using gradient boosting machine (GBM) or other machine learning algorithms, the relationship between the working condition parameters in the electrostatic precipitator and the operation cost (mainly the power consumption) of the electrostatic precipitator is established, and a model capable of predicting the operation cost of the electrostatic precipitator according to the working condition parameters is established according to a large amount of data obtained by the real-time data acquisition network.

[0087] Through the construction of the emission index prediction model and the operation cost prediction model, the digital modeling of the complex working conditions of the electrostatic precipitator is completed, forming a dust removal digital model, which provides a decision basis for subsequent seeking the lowest energy consumption under the premise of ensuring standard.

[0088] S2, real-time detection of the dust concentration at the air outlet 12 of the electrostatic precipitator; according to the dust concentration at the air outlet 12, the electric field intensity of each dust removal unit 2 is enhanced or reduced; repeat the above steps until the dust concentration at the air outlet 12 returns to the preset range.

[0089] Specifically, the following steps are included:

[0090] S21, real-time monitoring and state judgment: the control system continuously monitors the dust concentration at the air outlet 12 through the dust concentration sensor at the air outlet 12, and compares it with the user-set qualified emission concentration interval to judge the current emission state.

[0091] S22, starting optimization and parameter solving: when it is monitored that the dust concentration at the air outlet 12 exceeds the qualified range, or the system is in energy-saving state operation, the optimization control is started.

[0092] Specifically, the control system takes the lowest operation cost as the optimization target, takes the dust concentration at the air outlet 12 within the qualified range as the constraint condition, calls the trained dust removal digital model in step S12 and a multi-objective optimization algorithm, the multi-objective optimization algorithm can adopt reinforcement learning, PID control algorithm or genetic algorithm, and calculates the optimal electric field parameters of each dust removal unit 2 in real time.

[0093] Preferably, when the deviation of the dust concentration at the air outlet 12 from the limit value is small, the electric field parameter regulation of a single dust removal unit 2 is adopted; when the deviation is large, the electric field parameter regulation of multiple dust removal units 2 is adopted.

[0094] S23, instruction issuing and closed-loop execution: the control system converts the calculated optimal parameters into control instructions and issues them to the corresponding high-voltage power supply control cabinet for execution, and the high-voltage power supply control cabinet adjusts the electric field intensity of each dust removal unit 2. Thereafter, the system returns to step S21 and continues to monitor and feedback, forming a rolling closed-loop optimization process with a set control interval (e.g. 15 seconds) as the cycle.

[0095] S3, coordinated control of the rapping process.

[0096] Specifically, the following steps are included:

[0097] S31, rapping decision: the control system takes rapping as the highest priority control strategy. The system dynamically generates the optimal rapping timing and list according to the unit load, the dust accumulation condition of each dust removal unit 2 and the preset business rules.

[0098] S32, coordinated voltage reduction: before executing rapping on a certain dust removal unit 2, the control system preferentially issues instructions to the high-voltage power supply control cabinet of the dust removal unit 2 to temporarily reduce the voltage of the dust removal unit 2. The purpose of this step is to weaken the electrostatic adsorption force to facilitate the shedding of the dust cake and fundamentally prevent the detached dust from being repelled back into the dust-containing airflow by the electric field force, thereby avoiding secondary dust raising.

[0099] S33, execution of rapping and recovery: after the voltage reduction, the corresponding rapping unit 5 is started to perform the dust removal operation. After the rapping period ends, the control system instructs the high-voltage power supply control cabinet of the dust removal unit 2 to recover to the voltage value determined by the dynamic optimization control in step S2, and re-engage in efficient dust removal work.

[0100] The implementation principle of the embodiment of the present application is: based on the dust removal digital model capable of accurately predicting emissions and costs established in step S1, in step S2, the real-time data of the outlet dust concentration is taken as feedback, the emission standard is taken as a constraint, and the lowest cost is taken as a target, and a multi-objective optimization algorithm is used for rolling solution, so as to dynamically adjust the operating parameters of each electric field, so that the electrostatic precipitator always operates at the optimal energy-saving point under the current working condition. At the same time, in step S3, the rapping and cleaning process is taken as the highest priority event for collaborative control, and through the depressurization rapping strategy, the secondary dust raising is effectively inhibited, and finally the intelligent and fine energy saving and consumption reduction under the premise of ensuring the standard in the whole working condition range is realized.

[0101] Embodiment 2: An electrostatic precipitator, referring to Figure 5 The difference between the present embodiment and embodiment 1 is that the shell 1 comprises an air inlet section 13, an air outlet section 15 and a plurality of intermediate rings 14, the air inlet section 13 and the air outlet section 15 are arranged in a horizontal direction, the air inlet 11 is arranged on the air inlet section 13, and the air outlet 12 is arranged on the air outlet section 15. The air inlet 11 and the air outlet 12 are arranged in a horizontal direction.

[0102] Referring to Figure 5 The plurality of intermediate rings 14 are located between the air inlet section 13 and the air outlet section 15, the intermediate rings 14 are arranged in an axial direction along the air inlet section 13 and the air outlet section 15, and the plurality of intermediate rings 14 are arranged in sequence along the axial direction of the intermediate rings 14. The two ends of the intermediate ring 14 in the axial direction are respectively detachably connected with the corresponding adjacent intermediate ring 14, the air inlet section 13 or the air outlet section 15.

[0103] Referring to Figure 6 and Figure 7 The dust removal unit 2 is arranged in one-to-one correspondence with the intermediate ring 14, the top of the intermediate ring 14 is provided with a plug-in interface 141, the dust removal unit 2 is plug-in matched with the plug-in interface 141, and the dust removal unit 2 is detachably connected with the corresponding intermediate ring 14.

[0104] Referring to Figure 6 and Figure 7 The dust collection hopper 4 is arranged in one-to-one correspondence with the intermediate ring 14, and the dust collection hopper 4 is located below the corresponding intermediate ring 14 and is detachably connected with the corresponding intermediate ring 14. The dust outlet 142 is provided in the lower part of the intermediate ring 14, the dust collection hopper 4 closes the corresponding dust outlet 142, and the dust collection hopper 4 is in communication with the corresponding dust outlet 142.

[0105] Referring to Figure 6 and Figure 7 The rapping unit 5 is arranged in one-to-one correspondence with the intermediate ring 14, and the rapping unit 5 is arranged on the side wall of the corresponding intermediate ring 14.

[0106] Referring to Figure 8 and Figure 9In the embodiment, the dust removal unit 2 comprises a fixed frame 25, a plurality of dust collecting plates 22, a plurality of discharge shelves 21, a plurality of V-shaped guide plates 241 and a plurality of flow channel baffles 242 are arranged in the fixed frame 25, and the dust collecting plates 22, the discharge shelves 21, the V-shaped guide plates 241 and the flow channel baffles 242 are detachably connected with the fixed frame 25.

[0107] With reference to Figure 7 and Figure 8 , the intermediate ring 14 is provided with a support slide 143, the fixed frame 25 is inserted into the corresponding insertion port 141, and the fixed frame 25 is slidably connected with the corresponding support slide 143.

[0108] With reference to Figure 7 and Figure 8 , in the embodiment, the intermediate ring 14 is further provided with a sealing plate 144, the sealing plate 144 closes the corresponding insertion port 141, and the sealing plate 144 is fixedly connected with the corresponding intermediate ring 14 and the fixed frame 25.

[0109] The implementation principle of the embodiment is that the intermediate ring 14 and the corresponding dust removal unit 2 form a dust removal module, so that the number of dust removal modules of the electrostatic precipitator can be freely selected according to the actual working condition, so that the assembled electrostatic precipitator can meet the corresponding working condition demand, which can improve the applicability of the electrostatic precipitator.

[0110] Since the dust removal unit 2 is detachably connected with the corresponding intermediate ring 14, the dust removal unit 2 can be pulled out from the corresponding intermediate ring 14 for maintenance or replacement, which can reduce the maintenance difficulty of the electrostatic precipitator, thereby greatly shortening the downtime maintenance time and reducing the maintenance cost.

[0111] Embodiment 3: an electrostatic precipitator, with reference to Figure 10 and Figure 11 The difference between the embodiment and the embodiment 2 is that the fixed frame 25 is provided with a width adjustment driving assembly 26, and the plurality of dust collecting plates 22, the plurality of discharge shelves 21, the plurality of V-shaped guide plates 241 and the plurality of flow channel baffles 242 are connected with the width adjustment driving assembly 26.

[0112] With reference to Figure 11 and Figure 12In the embodiment, the width-adjusting driving assembly 26 comprises a plurality of linear driving members 261. Each linear driving member 261 comprises a driving seat 2611, which is arranged in the length direction of the dust collection plates 22 and in the spacing direction. Two screw rods 2612 are coaxially connected to the driving seat 2611 and are arranged in opposite directions. A sliding table 2613 is screwed to each screw rod 2612 and is slidably connected to the driving seat 2611 in the length direction of the driving seat 2611. A driving motor 2614 is coaxially connected to one of the screw rods 2612.

[0113] With reference to Figure 11 and Figure 12 In the embodiment, one of the discharge shelves 21 is arranged at the middle position, and the remaining dust collection plates 22 and discharge shelves 21 are symmetrically arranged on both sides of the discharge shelf 21 as the center. The two sliding tables 2613 on each linear driving member 261 are also symmetrically arranged on both sides of the discharge shelf 21 as the center.

[0114] With reference to Figure 11 and Figure 12 Each of the dust collection plates 22 and the discharge shelves 21, except for the middle discharge shelf 21, is correspondingly arranged with a sliding table 2613. The two sliding tables 2613 on each linear driving member 261 are respectively connected to the corresponding dust collection plate 22 or discharge shelf 21, so that each linear driving member 261 is connected to two symmetrically arranged dust collection plates 22 or discharge shelves 21. Thus, when the corresponding linear driving member 261 works, the two symmetrically arranged dust collection plates 22 or discharge shelves 21 can be synchronously moved inward or outward.

[0115] Therefore, under the cooperation of the plurality of linear driving members 261, all the dust collection plates 22 and discharge shelves 21 can be synchronously moved inward or outward as the center of the middle discharge shelf 21, which can adjust the width of the single dust removal flow channel 23.

[0116] Based on the design, the basic principle is to directly change the flow rate and residence time of the dust-containing airflow in the single dust removal flow channel 23 by actively adjusting the single dust removal flow channel 23, thereby giving the dust removal unit 2 the ability to switch between different performance modes. Specifically, according to the fluid mechanics continuity equation Under the condition that the total flue gas treatment amount Q is constant, the airflow velocity v is inversely proportional to the effective flow area A. Therefore, under the action of the width adjustment driving assembly 26, the total flow area A is directly changed by changing the width of the single dust removal flow channel 23, so as to realize the accurate control of the airflow velocity v. The airflow velocity v determines the residence time of the dust particles in the dust removal unit 2, and the residence time affects the dust removal efficiency. Therefore, by the action of the width adjustment driving assembly 26, the dust removal efficiency of the electrostatic precipitator can be changed, so that the electrostatic precipitator can be flexibly switched between the high-speed large treatment capacity mode and the low-speed fine filtration mode according to the real-time working condition requirements, so as to achieve the optimal comprehensive performance.

[0117] With reference to Figure 11 and Figure 12 In this embodiment, the V-shaped guide plate 241 or the flow channel baffle 242 in the single dust removal flow channel 23 is connected with the corresponding discharge flat shelf 21 or slide table 2613, so that the V-shaped guide plate 241 or the flow channel baffle 242 in the single dust removal flow channel 23 can move synchronously with the discharge flat shelf 21, thereby preventing the V-shaped guide plate 241 or the flow channel baffle 242 from interfering with the width adjustment of the single dust removal flow channel 23.

[0118] With reference to Figure 10 and Figure 11 In this embodiment, the fixed frame 25 is arranged in parallel and spaced apart along the width direction of the housing 1 between the two inner side walls and the adjacent corresponding discharge flat shelf 21, so as to form an air leakage flow channel between the inner side wall of the fixed frame 25 and the adjacent corresponding discharge flat shelf 21. The air leakage flow channel is provided with a sealing plate 251, which is slidingly connected with the corresponding fixed frame 25 along the width direction of the housing 1, and the sealing plate 251 is detachably connected with the corresponding discharge flat shelf 21. Therefore, the sealing plate 251 can dynamically seal the air leakage flow channel, thereby preventing the dust-containing airflow from passing through the air leakage flow channel.

[0119] With reference to Figure 10 The inner bottom of the fixed frame 25 is provided with a slide rail, and the length direction of the slide rail is arranged along the spacing direction of the plurality of dust collecting plates 22. Each dust collecting plate 22 and the bottom of the discharge flat shelf 21 are provided with a slide seat, and the V-shaped guide plate 241 or the flow channel baffle 242 is connected with the slide seat at the bottom of the corresponding discharge flat shelf 21, and the slide seat is slidingly arranged on the slide rail. Based on the cooperation of the slide seat and the slide rail, the stability and smoothness of the width adjustment of the single dust removal flow channel 23 are ensured.

[0120] The implementation principle of the embodiment of the present application is that when it is necessary to adjust the dust removal performance of the electrostatic precipitator, the control system can start the width adjustment driving assembly 26, at this time all the slide tables 2613 are synchronously moved inward or outward, thereby realizing the accurate synchronous adjustment of the width of all the single dust removal flow channels 23.

[0121] Through the adjustment function, the dust removal unit 2 module of the embodiment can be switched between at least two performance modes:

[0122] Low-speed fine filtration mode: the single dust removal flow channel 23 width is adjusted to the maximum, at which time the dust-containing gas flow rate in the single dust removal flow channel 23 is the lowest, the dust residence time is the longest, and the risk of secondary dust raising is the smallest. This mode is used to process fine dust with high specific resistance and difficult to capture, or when the environmental protection requirement is extremely strict, to pursue the ultimate dust removal efficiency.

[0123] High-speed large processing capacity mode: the single dust removal flow channel 23 width is appropriately adjusted to be smaller, at which time the dust-containing gas flow rate in the single dust removal flow channel 23 is increased, and the total flue gas amount that the entire device can process per unit time is increased. This mode is used to cope with the situation that the upstream working condition load suddenly increases and the flue gas amount suddenly increases, to ensure the smooth operation of the electrostatic precipitator and the working condition adaptability.

[0124] The embodiments of the specific embodiment are the preferred embodiments of the present application, and are not limited to the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electrostatic precipitator, characterized in that, The system includes a housing (1), with an air inlet (11) and an air outlet (12) on both sides along its length. The housing (1) contains several dust removal units (2), arranged sequentially along the length of the housing (1). Each dust removal unit (2) includes several leveling frames (21), arranged parallel to each other along the width of the housing (1). A dust collection plate (22) is provided between two adjacent leveling frames (21), arranged parallel to and spaced apart from the leveling frames (21), forming a single-stage dust removal channel (23) between two adjacent dust collection plates (22). A through hole (221) is provided through the dust collection plate (22), connecting two adjacent single-stage dust removal channels (23). A guide plate (24) is provided between two adjacent dust collection plates (22). The guide plate (24) is used to guide the dust-laden airflow entering the single dust removal channel (23) to pass through the corresponding dust collection plate (22). The end of the single dust removal channel (23) facing the air inlet (11) is the inlet, and the guide plate (24) is located at the inlet of the single dust removal channel (23); The guide plate (24) includes a V-shaped guide plate (241) and a flow channel baffle (242). The V-shaped guide plate (241) or the flow channel baffle (242) is disposed at the inlet of the corresponding single dust removal flow channel (23). Only one V-shaped guide plate (241) or one flow channel baffle (242) is disposed in each single dust removal flow channel (23). The V-shaped guide plate (241) is disposed in one single dust removal flow channel (23), and the flow channel baffle (242) is disposed in an adjacent single dust removal flow channel (23). The dust removal unit (2) also includes a fixed frame (25) and a width adjustment drive assembly (26). The dust collection plate (22), the leveling frame (21), and the guide plate (24) are all set in the corresponding fixed frame (25). The width adjustment drive assembly (26) is set in the fixed frame (25). The leveling frame (21) and the dust collection plate (22) are all connected to the width adjustment drive assembly (26). The width adjustment drive assembly (26) is used to drive all the dust collection plates (22) and leveling frames (21) to move inward or outward synchronously with the leveling frame (21) in the middle as the center. This can adjust the width of the single dust removal channel (23). The V-shaped guide plate (241) and the flow channel baffle (242) are respectively connected to the corresponding discharge level frame (21) or the width adjustment drive assembly (26), so that the V-shaped guide plate (241) and the flow channel baffle (242) can move synchronously with the corresponding discharge level frame (21); The fixed frame (25) is arranged parallel to and spaced apart from the adjacent corresponding leveling frame (21) on its two inner sidewalls along the width direction of the housing (1), forming an air leakage channel between the inner sidewall of the fixed frame (25) and the adjacent corresponding leveling frame (21); a sealing plate (251) is provided in the air leakage channel, the sealing plate (251) is slidably connected to the corresponding fixed frame (25) along the width direction of the housing (1), and the sealing plate (251) is detachably connected to the corresponding leveling frame (21), and the sealing plate (251) dynamically seals the air leakage channel; The housing (1) includes an air inlet section (13), an air outlet section (15), and several intermediate rings (14). The air inlet (11) is opened on the air inlet section (13), and the air outlet (12) is opened on the air outlet section (15). Several intermediate rings (14) are located between the air inlet section (13) and the air outlet section (15). The intermediate rings (14) are arranged axially along the interval direction between the air inlet section (13) and the air outlet section (15), and several intermediate rings (14) are arranged sequentially along their own axial direction. The two ends of the axial direction of the intermediate rings (14) are detachably connected to the corresponding adjacent intermediate rings (14), the air inlet section (13), or the air outlet section (15). The intermediate rings (14) are arranged one-to-one with the dust removal unit (2). The fixing frame (25) is arranged in the corresponding intermediate ring (14), and the fixing frame (25) is detachably connected to the corresponding intermediate ring (14).

2. The electrostatic precipitator according to claim 1, characterized in that, The single dust removal channels (23) in two adjacent dust removal units (2) are arranged in a one-to-one correspondence, and the two single dust removal channels (23) are connected sequentially along the length direction of the shell (1).

3. The electrostatic precipitator according to claim 1, characterized in that, The dust collection plate (22) includes a plurality of first plates (222) and a plurality of second plates (223). The plurality of second plates (223) and the plurality of first plates (222) are arranged alternately along the length direction of the housing (1). Adjacent second plates (223) are arranged in parallel and spaced apart. Adjacent first plates (222) are arranged in parallel and spaced apart. The two sides of the second plates (223) are respectively connected to the corresponding adjacent first plates (222). The second plates (223) and the adjacent first plates (222) are arranged in a V-shape. The through hole (221) is opened through the first plate (222) or the second plate (223).

4. An electrostatic precipitator according to claim 3, characterized in that, All the through holes (221) on one of the dust collection plates (22) are opened on the first plate (222), and all the through holes (221) on the adjacent dust collection plate (22) are opened on the second plate (223).

5. An electrostatic precipitator according to claim 1, characterized in that, It also includes a rapping unit (5) and several dust collection hoppers (4). The rapping unit (5) is disposed on the housing (1). The dust collection hoppers (4) are disposed below the housing (1) and are connected to the housing (1). The dust collection hoppers (4) are disposed in one-to-one correspondence with the dust removal unit (2). The dust collection hoppers (4) are located directly below the corresponding dust removal unit (2).

6. A control method for an electrostatic precipitator, used to control the electrostatic precipitator according to any one of claims 1-5, characterized in that, The steps include: real-time detection of dust concentration at the outlet (12) of the electrostatic precipitator; increasing or decreasing the electric field strength of each dust removal unit (2) according to the dust concentration at the outlet (12); repeating the above steps until the dust concentration at the outlet (12) returns to the preset range.

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