Smoke pipe purification equipment

Abstract

This application relates to the technical field of fume treatment, and particularly to a flue pipe purification device. The flue pipe purification device includes a housing, a coagulation and charging device, and a collection device. A flue gas passage is formed inside the housing, and an air inlet at one end of the flue gas passage can be connected to the flue pipe of an oil fume machine, so that the flue gas discharged from the flue pipe can flow into the flue gas passage. The coagulation and charging device and the collection device are arranged at intervals in the flue gas passage along the flowing direction of the flue gas in the flue gas passage, so that the flue gas passes through the coagulation and charging device and the collection device in sequence. The coagulation and charging device is used for charging the pollutant particles in the flue gas, so that the pollutant particles in the flue gas are charged and can coagulate to form pollutant particles with larger particle sizes. The collection device is used for capturing the pollutant particles, and the pollutant particles with larger particle sizes after charge coagulation are more easily captured, thereby realizing the purification of the flue gas and improving the purification effect.

Description

Technical Field

[0001] This application relates to the technical field of fume treatment, and particularly to a flue purification device. Background Art

[0002] Industrial waste gas, vehicle exhaust gas, and fumes from the catering industry and household kitchens are regarded as the three major culprits causing air pollution, especially the large amount of high-concentration fumes generated during the food cooking and processing process. At present, the fumes of most old household range hoods are directly discharged to the outside through the flue without being treated before discharge, and the discharge frequency is high and the pollution is strong; therefore, how to do a good job in fume purification at the flue stage after the range hood has become an important problem to be solved at the present stage and for some time to come. Summary of the Invention

[0003] The purpose of the present invention is to provide a flue purification device to purify the flue gas discharged from the flue to a certain extent.

[0004] The present invention provides a flue purification device for communicating with a flue to purify the flue gas discharged from the flue; the flue purification device includes a housing, a coagulation and charging device, and a collection device; the housing forms a flue gas passage, and the air inlet of the flue gas passage is used to communicate with the flue; the coagulation and charging device and the collection device are arranged at intervals in the flue gas passage along the flowing direction of the flue gas, so that the flue gas passes through the coagulation and charging device and the collection device in sequence; the coagulation and charging device is used to charge the flue gas, so that the pollutant particles in the flue gas are charged and can coagulate, and the collection device is used to capture the pollutant particles.

[0005] Further, the coagulation and charging device includes a plurality of charging mechanisms; each charging mechanism includes a conductive generating head, one end of the generating head is a fixed end, the fixed end is connected to the side wall of the flue gas passage, the other end of the generating head forms a tip, and the tip of the generating head points to the inside of the flue gas passage; the plurality of charging mechanisms are arranged at intervals along the flowing direction of the flue gas, and the generating heads of any two adjacent charging mechanisms are electrically connected to output electrodes with different electricities.

[0006] Further, each charging mechanism includes a plurality of the generating heads, the plurality of generating heads are distributed at intervals along the circumferential direction of the flue gas passage, and the plurality of generating heads are installed on the side wall of the flue gas passage through an insulating base.

[0007] Further, an annular installation groove is formed in the insulating base, and the fixed ends of the plurality of generating heads are inserted into the installation groove; through holes are formed in the fixed ends of the generating heads, a conducting wire is arranged in the installation groove, and one end of the conducting wire sequentially passes through the through holes of the plurality of generating heads, so that an electric current path is formed between the conducting wire and the generating heads; a first electrode connecting device is arranged on the side wall of the installation groove, and the conducting wire is electrically connected to the first electrode connecting device.

[0008] Further, the tip of the generating head faces the air inlet of the flue gas passage, a projection straight line is formed by the generating head in the cross-section of the flue gas passage through which the fluid flows, and the projection straight line is not collinear with the radial line of the cross-section through which the fluid flows.

[0009] Further, the collecting device includes a first orifice plate; the first orifice plate is arranged perpendicular to the flowing direction of the flue gas, a plurality of first ventilation holes penetrating through the first orifice plate are formed in the first orifice plate, and the first ventilation holes are in a tapered shape; the first orifice plate has electrical conductivity and can be used for electrically connecting to an output electrode.

[0010] Further, the collecting device includes a plurality of the first orifice plates; the plurality of first orifice plates are arranged at intervals along the flowing direction of the flue gas, and any two adjacent first orifice plates are used for electrically connecting to output electrodes with different electric polarities.

[0011] Further, a plurality of second ventilation holes penetrating through the first orifice plate are further formed in the first orifice plate, and the second ventilation holes are in a gradually expanding shape; each first ventilation hole has at least one adjacent second ventilation hole.

[0012] Further, an auxiliary coagulation device is further arranged between the coagulation and charging device and the collecting device; the auxiliary coagulation device includes a second orifice plate, the second orifice plate is arranged perpendicular to the flowing direction of the flue gas, and a plurality of third ventilation holes penetrating through the second orifice plate are formed in the second orifice plate; the plurality of third ventilation holes all have a gradually changing cross-section through which the fluid flows, and each third ventilation hole has at least one adjacent third ventilation hole with a gradually changing direction opposite to that of the adjacent third ventilation hole.

[0013] Further, the number of the second orifice plates is multiple, and the multiple second orifice plates are arranged at intervals along the flowing direction of the flue gas.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The flue gas purification device provided by the present invention includes a housing, a coagulation and charging device, and a collection device. A flue gas passage is formed in the housing, and an air inlet at one end of the flue gas passage can be connected to the flue of an oil fume purifier, so that the flue gas discharged from the flue can flow into the flue gas passage. The coagulation and charging device and the collection device are both arranged in the flue gas passage, and the coagulation and charging device and the collection device are arranged at intervals along the flow direction of the flue gas in the flue gas passage. The coagulation and charging device is located upstream of the flue gas passage, and the collection device is located downstream of the flue gas passage, so that the flue gas entering the flue gas passage passes through the coagulation and charging device and the collection device in sequence. The coagulation and charging device is used to charge the pollutant particles in the flue gas, so that some of the pollutant particles in the flue gas carry positive charges, while the other part of the pollutant particles carry negative charges; then, using the electric field force between the positive and negative charged particles, the pollutant particles with different charges will attract each other and coagulate, so as to form pollutant particles with larger particle sizes in a group. The collection device is used to capture the pollutant particles in the flue gas, and the pollutant particles in the charged flue gas will coagulate to form pollutant particles with larger particle sizes, so that the pollutant particles are easier to be captured, realizing the purification of the flue gas and improving the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the flue gas purification device provided in the first embodiment of the present application;

[0018] Figure 2 Structural schematic diagram of the coagulation and charging device provided in the first embodiment of the present application;

[0019] Figure 3 Structural schematic diagram of the collection device provided in the first embodiment of the present application from the first perspective;

[0020] Figure 4 Structural schematic diagram of the collection device provided in the first embodiment of the present application from the second perspective;

[0021] Figure 5 For Figure 4 Cross-sectional view at A-A in

[0022] Figure 6 Structural schematic diagram of the flue gas purification device provided in the second embodiment of the present application.

[0023] Reference numerals:

[0024] 1 - Coagulation charging device, 11 - Insulating base, 12 - Generation head, 2 - Collection device, 21 - First orifice plate, 22 - First ventilation hole, 23 - Second ventilation hole, 3 - Auxiliary coagulation device. Detailed implementation mode

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments.

[0026] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention.

[0027] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] Next, refer to Figures 1 to 6 Describe the flue gas purification equipment according to some embodiments of the present application.

[0031] Embodiment 1

[0032] Embodiment 1 of the present application provides a flue gas purification equipment, which is used to be arranged at the flue of an oil fume machine and communicate with the flue, so as to purify the flue gas discharged from the flue through the flue gas purification equipment.

[0033] As Figure 1 shown, the flue gas purification device includes a housing, a coagulation and charging device 1 and a collection device 2. A flue gas passage is formed inside the housing, and an air inlet at one end of the flue gas passage can be connected to the flue of an oil fume extractor so that the flue gas discharged from the flue can flow into the flue gas passage. The coagulation and charging device 1 and the collection device 2 are both arranged in the flue gas passage, and the coagulation and charging device 1 and the collection device 2 are arranged at intervals along the flowing direction of the flue gas in the flue gas passage. The coagulation and charging device 1 is located upstream of the flue gas passage, and the collection device 2 is located downstream of the flue gas passage, so that the flue gas entering the flue gas passage passes through the coagulation and charging device 1 and the collection device 2 in sequence.

[0034] Among them, the coagulation and charging device 1 is used to charge the pollutant particles in the flue gas, so that some of the pollutant particles in the flue gas carry positive charges, while some other pollutant particles carry negative charges; then, by using the electric field force between the positive and negative charged particles, the pollutant particles with different charges will attract each other and coagulate, so as to form pollutant particles with larger particle sizes in a cluster for easy collection.

[0035] Regarding the coagulation and charging device 1, in this embodiment, preferably, as Figure 2 shown, the coagulation and charging device 1 includes a plurality of charging mechanisms, and the plurality of charging mechanisms are respectively installed on the inner side wall of the flue gas passage, and the plurality of charging mechanisms are arranged side by side along the flowing direction of the flue gas in the flue gas passage. The charging mechanism can be electrically connected to the output electrode, and two adjacent charging mechanisms are respectively electrically connected to output electrodes with different electric charges, such as a positive high-voltage electrode or a negative high-voltage electrode, so as to respectively charge the pollutant particles in the flue gas positively and negatively, so that some of the pollutant particles in the flue gas carry positive charges, and some other pollutant particles carry negative charges.

[0036] Preferably, as Figure 2 shown, the charging mechanism includes an insulating base 11 and a discharge head 12. The discharge head 12 is strip-shaped. One end of the discharge head 12 in the length direction, that is, the fixed end of the discharge head, is installed on the inner side wall of the flue gas passage through the insulating base 11. The length direction of the discharge head 12 is not perpendicular to the flow cross-section of the flue gas passage at its location, so that the other end of the discharge head 12 in the length direction points to the inside of the flue gas passage. The discharge head 12 has electrical conductivity, so that the discharge head 12 can be electrically connected to the positive high-voltage electrode or the negative high-voltage electrode, and a tip is formed at the end of the discharge head 12 pointing to the inside of the flue gas passage. When the discharge head 12 is electrically connected to the positive high-voltage electrode or the negative high-voltage electrode, the discharge head 12 can perform tip discharge towards the flue gas passage, so that the pollutant particles in the flue gas carry corresponding positive or negative charges, completing the charging of the pollutant particles in the flue gas. Then, by using the electric field force between the positive and negative charged particles, the pollutant particles with different charges coagulate and form pollutant particles with larger particle sizes and are convenient for collection.

[0037] In this embodiment, preferably, each charging mechanism includes a plurality of emission heads 12. The insulating base 11 of the charging mechanism is annular and adapted to the flue gas passage, so that the insulating base 11 can be installed on the inner side wall of the flue gas passage around the circumference of the flue gas passage; the plurality of emission heads 12 are installed on the insulating base 11 at circumferential intervals. Thus, by providing a plurality of emission heads 12, the coverage range of the charging mechanism is increased, and the charging efficiency is further improved.

[0038] In this embodiment, preferably, the fixed end of the emission head 12 is installed on the side wall of the flue gas passage, and the emission head 12 is inclined at a predetermined angle towards the inside of the flue gas passage, that is, the length direction of the emission head 12 forms a predetermined inclination angle with the central axis of the flue gas passage, so that a projection straight line with a predetermined length is formed in the cross-section of the flue gas passage passing through the emission head 12, and the tip of the emission head 12 faces the air inlet of the flue gas passage; when the emission head 12 is energized to work, the emission head 12 will emit a point-impulse ion wind along its own axis direction and form a secondary flow, and since the tip of the emission head 12 faces the air inlet of the flue gas passage, the direction of the ion wind is opposite to the flow direction of the flue gas, thereby increasing the time for the flue gas to pass through the charging mechanism and increasing the charging time of the emission head 12 for the pollutant particles in the flue gas.

[0039] Preferably, the projection straight line formed by the emission head 12 in the cross-section of the flue gas passage does not pass through the central axis of the cross-section, that is, the projection straight line and the radial line of the cross-section are not collinear, so that the plurality of emission heads 12 circumferentially spaced on the insulating base 11 are in a spiral shape, so that the ion winds emitted by the plurality of emission heads 12 are also in a spiral shape and point to the central axis of the flue gas passage, thereby making the charging area of the charging mechanism cover the entire cross-section of the flue gas passage and improving the charging efficiency.

[0040] Regarding the connection between the insulating base 11 and the emission head 12, in this embodiment, preferably, the insulating base 11 is provided with an annular installation groove along its circumference, and the fixed end of the emission head 12 can be inserted into the installation groove, and then insulating glue is filled in the installation groove to form an insulating glue layer to fix the fixed end of the emission head 12 in the installation groove.

[0041] Preferably, a conducting wire is arranged in the installation groove, and a through hole is opened at the fixed end of the emission head 12. One end of the conducting wire sequentially passes through the through holes of the plurality of emission heads 12, so that the conducting wire is connected to the plurality of emission heads 12 to form a current path. A first electrode connection device is arranged on the side wall of the insulating base 11, and the other end of the conducting wire is electrically connected to the first electrode connection device, and the first electrode connection device is used for electrically connecting to the output electrode of external positive high voltage or negative high voltage, so that the emission head 12 is charged to be able to perform tip discharge and charge the pollutant particles in the flue gas.

[0042] After being charged, the flue gas will continue to flow backward to the collection device 2, so that the collection device 2 can capture the pollutant particles in the flue gas. The pollutant particles in the charged flue gas will coagulate to form pollutant particles with a larger particle size, so that the pollutant particles are easier to be captured, realizing the purification of the flue gas and improving the purification effect.

[0043] Regarding the collection device 2, in this embodiment, preferably, as Figures 3 to 5 shown, the collection device 2 includes a first orifice plate 21. The plate surface of the first orifice plate 21 is perpendicular to the flow direction of the flue gas, and a plurality of first ventilation holes 22 penetrating through the front and back plate surfaces of the first orifice plate 21 are formed on the first orifice plate 21, so that the flue gas can pass through the first ventilation holes 22 and pass through the first orifice plate 21; the first ventilation holes 22 are tapered, that is, the hole wall of the first ventilation hole 22 forms a predetermined inclination angle with the axis of the first ventilation hole 22, and the air inlet of the first ventilation hole 22 is larger than the air outlet.

[0044] When the flue gas passes through the first ventilation holes 22, the pollutant particles with a larger particle size in the flue gas will hit the hole wall of the tapered first ventilation holes 22 due to their large mass and large movement inertia, and because the pollutant particles in the flue gas discharged by the range hood have high viscosity, they will adhere to the hole wall of the first ventilation holes 22, thereby realizing the capture of the pollutant particles with a larger particle size in the flue gas.

[0045] Preferably, the first orifice plate 21 has conductivity, and the first orifice plate 21 can be used to be electrically connected to the output electrode, such as electrically connecting the first orifice plate 21 to the positive high-voltage electrode, the negative high-voltage electrode or the ground electrode. The pollutant particles in the oil fume will coagulate after being charged to form pollutant particles with a larger particle size that are not electrically charged, but there are still some small-particle-size pollutant particles that do not coagulate and are positively or negatively charged; when collecting the pollutant particles in the flue gas through a first orifice plate 21, the first orifice plate 21 can be electrically connected to the ground electrode, so that when the flue gas passes through the first ventilation holes 22, the charged small-particle-size pollutant particles in the flue gas will be attracted by the electric field force and move towards the hole wall of the first ventilation holes 22 and adhere to the hole wall to complete the collection action of the small-particle-size pollutant particles, and further enable the collection device 2 to realize the collection of both larger-particle-size pollutant particles and small-particle-size pollutant particles.

[0046] In this embodiment, preferably, as Figure 1 shown, the number of the first orifice plates 21 can be multiple, and the multiple first orifice plates 21 are arranged side by side at intervals along the flow direction of the flue gas to collect the pollutant particles in the flue gas through the multiple first orifice plates 21 and improve the flue gas purification effect.

[0047] Preferably, when multiple first orifice plates 21 are used for collection, any two adjacent first orifice plates can be electrically connected to output electrodes with different electricities, such as positive + ground, negative + ground, positive + negative, or negative + positive, so as to further enhance the collection efficiency of charged small-sized pollutant particles in the flue gas.

[0048] Preferably, as Figure 5 shown, a plurality of second ventilation holes 23 penetrating the front and rear plate surfaces of the first orifice plate 21 are further formed on the first orifice plate 21, and the flue gas can also pass through the first orifice plate 21 through the second ventilation holes 23; the second ventilation holes 23 also have a gradually changing air passing cross-section, and the second ventilation holes 23 are in a gradually expanding shape opposite to the gradually changing direction of the first ventilation holes 22, that is, the air inlet of the second ventilation holes 23 is smaller than the air outlet. Each first ventilation hole 22 on the first orifice plate 21 has at least one adjacent second ventilation hole 23 with an opposite gradually changing direction. Preferably, a plurality of rows of first ventilation holes 22 and a plurality of second ventilation holes 23 are formed on the first orifice plate 21, and a row of second ventilation holes 23 is arranged between every two adjacent rows of first ventilation holes 22, so that the adjacent two rows of ventilation holes have opposite gradually changing directions.

[0049] When the flue gas passes through the gradually shrinking first ventilation holes 22, as the cross-section of the flowing-through gradually decreases, the wind speed of the flue gas will gradually increase; when the flue gas passes through the gradually expanding second ventilation holes 23, as the cross-section of the flowing-through gradually increases, the wind speed of the flue gas will gradually decrease, so that when the flue gas passes through two adjacent ventilation holes with opposite gradually changing directions, a local wind speed gradient will be generated and a turbulent flow will be formed, generating turbulent vortices, so that the flue gas is stirred and extruded, intensifying the collision of pollutant particles in the flue gas. The pollutant particles in the flue gas will undergo more friction and collision, increasing the probability of inelastic collision between the pollutant particles, and further enhancing the coagulation effect of the positively and negatively charged pollutant particles in the flue gas. When the flue gas is purified and collected by multiple first orifice plates 21, the coagulation and collection of the charged pollutant particles in the flue gas will be carried out simultaneously. For example, the small-sized charged pollutant particles are coagulated at the previous first orifice plate 21, the particle size becomes larger, and then they impact and adhere to the pore wall of the ventilation holes of the next-layer first orifice plate 21 to complete the collection, thereby further enhancing the collection and purification effect.

[0050] Embodiment 2

[0051] The array turbulent flow device in this embodiment is an improvement based on Embodiment 1. The technical content disclosed in Embodiment 1 will not be described repeatedly, and the content disclosed in Embodiment 1 also belongs to the content disclosed in this Embodiment 2.

[0052] As Figure 6As shown in the figure, Embodiment 2 of the present application provides a flue gas purification device which further includes an auxiliary coagulation device 3. The auxiliary coagulation device 3 is arranged between the coagulation charging device 1 and the collection device 2, so that after the flue gas is charged, it first passes through the auxiliary coagulation device 3 and then flows to the collection device 2 for collection, so as to enhance the coagulation effect of pollutant particles in the flue gas through the auxiliary coagulation device 3, increase the number of pollutant particles with larger particle sizes in the flue gas, and thus make it more conducive to the collection device 2 to collect the pollutant particles in the flue gas and improve the oil fume purification effect.

[0053] In this embodiment, preferably, the auxiliary coagulation device 3 includes a second orifice plate. The plate surface of the second orifice plate is perpendicular to the flow direction of the flue gas, and a plurality of third ventilation holes penetrating through the front and rear plate surfaces of the second orifice plate are provided on the second orifice plate, so that the flue gas can pass through the second orifice plate through the third ventilation holes, and the plurality of third ventilation holes all have a gradually changing flow cross-section, so that the third ventilation holes are in a gradually shrinking or gradually expanding shape. A part of the plurality of third ventilation holes is in a gradually shrinking shape, and the other part is in a gradually expanding shape, and each third ventilation hole has another third ventilation hole adjacent to it and with a gradually changing direction opposite to it. When the flue gas passes through two adjacent third ventilation holes with opposite gradually changing directions, a local wind speed gradient will be generated and a turbulent flow will be formed, generating turbulent vortices, so that the flue gas passing through the third ventilation holes is stirred and extruded, intensifying the collision of pollutant particles in the flue gas. The pollutant particles in the flue gas will undergo more friction and collision, increasing the probability of inelastic collision between pollutant particles, thereby improving the coagulation effect of pollutant particles with positive and negative charges in the flue gas, increasing the number of pollutant particles with larger particle sizes in the oil fume, and thus making it more conducive to the collection device 2 to collect the pollutant particles in the oil fume and improving the oil fume purification effect.

[0054] In this embodiment, preferably, the number of the second orifice plates is multiple, and the multiple second orifice plates are distributed at intervals along the flow direction of the flue gas, so as to further improve the coagulation effect of small particle size pollutant particles in the flue gas through the multiple second orifice plates.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A smoke pipe purification device is used to communicate with a smoke pipe to purify the flue gas discharged from the smoke pipe; characterized in that, The flue gas purification device includes a housing, a coagulation and charging device, and a collection device; The housing forms a flue gas passage, and the air inlet of the flue gas passage is used to communicate with the flue pipe; The coagulation and charging device and the collection device are arranged at intervals in the flue gas passage along the flowing direction of the flue gas, so that the flue gas passes through the coagulation and charging device and the collection device in sequence; The coagulation and charging device is used to charge the flue gas, so that the pollutant particles in the flue gas are charged and can coagulate, and the collection device is used to capture the pollutant particles; The coagulation and charging device includes a plurality of charging mechanisms; The charging mechanism includes a conductive generating head, one end of the generating head is a fixed end, the fixed end is connected to the side wall of the flue gas passage, the other end of the generating head forms a tip, and the tip of the generating head points to the inside of the flue gas passage; A plurality of the charging mechanisms are arranged at intervals along the flowing direction of the flue gas, and the generating heads of any two adjacent charging mechanisms are used to be electrically connected to output electrodes with different electricities; The charging mechanism includes a plurality of the generating heads, the plurality of generating heads are arranged at intervals along the circumferential direction of the flue gas passage, and the plurality of generating heads are installed on the side wall of the flue gas passage through an insulating base; an annular installation groove is formed on the insulating base, and the fixed ends of the plurality of generating heads are inserted into the installation groove; The tip of the generating head faces the air inlet of the flue gas passage, a projection straight line is formed by the generating head in the cross-section of the flue gas passage through which the fluid flows, and the projection straight line and the radial line of the cross-section through which the fluid flows are not collinear.

2. The flue pipe purification device according to claim 1, characterized in that, A through hole is formed in the fixed end of the generating head, a conducting wire is arranged in the installation groove, and one end of the conducting wire sequentially passes through the through holes of the plurality of generating heads, so that the conducting wire forms a current path with the generating head; A first electrode connection device is arranged on the side wall of the installation groove, and the conducting wire is electrically connected to the first electrode connection device.

3. The flue pipe purification device according to claim 1, characterized in that, The collection device includes a first orifice plate; The first orifice plate is arranged perpendicular to the flowing direction of the flue gas, and a plurality of first ventilation holes penetrating through the first orifice plate are formed on the first orifice plate, and the first ventilation holes are in a tapered shape; The first orifice plate has conductivity, and the first orifice plate can be used to be electrically connected to an output electrode.

4. The flue pipe purification device according to claim 3, characterized in that, The collection device includes a plurality of the first orifice plates; A plurality of the first orifice plates are arranged at intervals along the flowing direction of the flue gas, and any two adjacent first orifice plates are used to be electrically connected to output electrodes with different electricities.

5. The flue pipe purification device according to claim 3, characterized in that, A plurality of second ventilation holes penetrating through the first orifice plate are further formed on the first orifice plate, and the second ventilation holes are in a tapered shape; Each of the first ventilation holes has at least one of the second ventilation holes adjacent to it.

6. The flue pipe purification device according to claim 1, characterized in that, An auxiliary coagulation device is further arranged between the coagulation and charging device and the collection device; The auxiliary coagulation device includes a second orifice plate, the second orifice plate is arranged perpendicular to the flowing direction of the flue gas, and a plurality of third ventilation holes penetrating through the second orifice plate are formed on the second orifice plate; Each of the plurality of third ventilation holes has a gradually changing flow cross-section, and each of the third ventilation holes has at least one adjacent third ventilation hole with a gradually changing direction opposite thereto.

7. The smoke pipe purification device according to claim 6, characterized in that, The number of the second orifice plates is plural, and the plurality of second orifice plates are arranged at intervals along the flowing direction of the flue gas.

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