An upper spray dust suppression device in the flue

Abstract

The present invention discloses an internal flue top spray dust reduction device, comprising a dust reduction water tank, the dust reduction water tank being arranged in a preset groove at the bottom of the flue, and the upper surface of the dust reduction water tank being flush with the bottom of the flue; a sedimentation filter box being arranged in the preset groove at the bottom of the flue, for receiving dust-laden sewage generated by the dust reduction water tank; and a high-pressure water pump being arranged outside the flue and connected to the dust reduction water tank and the sedimentation filter box via a pipeline, for pumping water filtered by the sedimentation filter box into the dust reduction water tank and increasing its internal pressure for recycling. The present invention adopts an upper spraying method, so that the spray water is dispersed and falls under the influence of gravity and air resistance, thereby forming multiple covering water flows, reducing water flow gaps, and utilizing a water film to make the freely falling water flow fall on the flowing water surface with low impact, effectively avoiding splashing, thereby achieving good dust reduction and dust prevention effects.

Description

Technical Field

[0001] The invention relates to the technical field of gypsum board production, and in particular to an upper spraying dust suppression device in a flue. Background Art

[0002] During the production process of gypsum board, heat source is required for drying, and the heat source is usually provided by coal burning. Coal burning will produce polluted flue gas (containing gaseous pollutants and particulate matter), so the flue gas needs to be treated for environmental protection (desulfurization and denitrification, etc.). During the flue gas environmental protection treatment process, the particles in the flue gas are easily trapped at the connection between the flue pipe and the desulfurization tower, especially the Venturi flue, where the flue gas turns and stalls and is retained, causing smoke and dust accumulation. Therefore, it needs to be cleaned regularly to avoid flue blockage and safety accidents.

[0003] Existing flue dust reduction devices usually adopt a bottom spraying structure, that is, they use a top-down spraying method to reduce dust. This spraying method can reduce the dust content in the flue gas and can process and discharge the dust particles to avoid accumulation. However, this method has the following problems:

[0004] 1) Due to the adoption of a bottom-spray structure, a spray assembly needs to be installed on the upper wall of the flue, and a sewage treatment assembly for collecting sewage needs to be installed on the bottom wall of the flue. In order not to affect the flow of flue gas, both the spray assembly and the sewage treatment assembly need to be provided with corresponding preset grooves on the upper and lower walls of the flue pipe, which means that the flue pipe needs to be significantly modified.

[0005] 2) When using the downward spray method, each nozzle actually forms only one spray water flow, and a spray dust reduction area is formed through multiple arranged nozzles. However, since the water flow in the downward spray process flows downward, its kinetic energy is large. Therefore, air resistance is difficult to change its path, resulting in a small diameter of each water flow column. Therefore, the actual coverage area of ​​the nozzle spray is small, which makes it more likely that smoke and dust will escape with the smoke.

[0006] 3) The sewage treatment component used to receive water in the lower spray structure is a sewage pool structure. When the spray water rushes into the sewage pool at a high speed, a large amount of sewage will splash, causing the rest of the flue to become wet and absorb dust accumulation.

[0007] In summary, the water flow path formed by the existing downward spray dust reduction device in the flue is single, and there are many gaps, which easily allow smoke and dust to escape, and easily cause water to splash onto the flue wall and attract dust to adhere and deposit. Summary of the Invention

[0008] The purpose of the present invention is to provide an upper spray dust suppression device in a flue to solve the technical problems in the prior art that the water flow path generated by the lower spray type is single, resulting in many gaps that easily allow smoke and dust to escape, and the water flow easily impacts and splashes onto the flue wall, attracting smoke and dust to adhere and deposit.

[0009] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0010] An upper spray type dust suppression device in a flue, comprising:

[0011] A dust suppression water tank is arranged in a preset groove at the bottom of the flue, and the upper surface of the dust suppression water tank is flush with the bottom of the flue;

[0012] A sedimentation filter box is provided in a preset groove at the bottom of the flue, and is used to receive the dust-laden sewage produced by the dust reduction water tank;

[0013] a high-pressure water pump, arranged outside the flue and connected to the dust suppression water tank and the sedimentation filter box through a pipeline, for pumping the water filtered by the sedimentation filter box into the dust suppression water tank and increasing the internal pressure thereof for recycling;

[0014] The upper surface of the dust suppression water tank is inclined, and a water film outlet is provided at the highest point of the upper surface of the dust suppression water tank, and a plurality of water spray holes with decreasing heights are evenly provided on the upper surface of the dust suppression water tank;

[0015] After the multiple water spray holes are pressurized in the dust reduction water tank, they spray water upward to form a dust reduction area, so that the smoke dust in the smoke passing through the dust reduction area settles and falls to the upper surface of the dust reduction water tank along with the water;

[0016] After the water film outlet is pressurized in the dust reduction water tank, water overflows upward and flows along the inclined upper surface of the dust reduction water tank to form a flowing water film, so that the smoke and dust settled in the water and fell on the upper surface of the dust reduction water tank flow along with the flowing water film and are discharged into the sedimentation filter box.

[0017] As a preferred solution of the present invention, the upper surface of the dust suppression water tank is configured as a wave surface, and the water spray holes are configured on the wave crests;

[0018] The crests and troughs of the wave surface are both tilted downward, and the water overflowing from the water film outlet flows downward along the troughs of the wave surface.

[0019] As a preferred solution of the present invention, the cross-sectional width of the crest of the wave surface is smaller than the cross-sectional width of the trough, and the net height of the crest of the wave surface is smaller than the net depth of the trough.

[0020] As a preferred solution of the present invention, the upper surface of the dust reduction water box located upstream of the flue gas flow is higher than the side located downstream of the flue gas flow, so that the water film outlet is located upstream of the flue gas flow and the multiple water spray holes are located downstream of the flue gas flow.

[0021] As a preferred solution of the present invention, a windshield for blocking the flue gas flow is provided on the upper surface of the dust suppression water box at the edge of the water film outlet, and the windshield is located on the side edge of the water film outlet facing the upstream of the flue gas flow.

[0022] As a preferred solution of the present invention, the wind shield includes a vertical baffle vertically arranged at the edge of the water film outlet, and an anti-collision baffle is arranged at the upper end of the vertical baffle;

[0023] Wherein, the anti-impact baffle is arranged to be inclined toward the upper surface of the dust suppression water tank.

[0024] As a preferred embodiment of the present invention, side overflow prevention plates are provided on both sides of the dust suppression water tank and are attached to the inner wall of the flue. The upper ends of the side overflow prevention plates are higher than the upper surface of the dust suppression water tank, and the side ends of the two side overflow prevention plates extend out of the dust suppression water tank to be attached to the side walls of the sedimentation filter box.

[0025] The two side overflow prevention plates are connected and sealed to the side ends of the vertical baffle and the anti-impact baffle to form a splash-proof port between the anti-impact baffle and the upper surface of the dust suppression water tank.

[0026] As a preferred embodiment of the present invention, the sedimentation filter box includes a sedimentation box, a water filter box is provided on the side wall of the sedimentation box, a water filter pipe is provided between the sedimentation box and the water filter box to form mutual communication, and the water filter box is connected to the negative pressure end of the high-pressure water pump through a pipeline;

[0027] The upper end of the sedimentation tank has no cover, and the lower end of the sedimentation tank is provided with a sewage pipe with a valve, and the filter water tank is provided with a water supply pipe with a valve;

[0028] Among them, the side wall of the dust reduction water tank located downstream of the flue gas flow is concave, so that the upper surface of the dust reduction water tank forms an eaves structure, and the sedimentation box is installed against the side wall of the dust reduction water tank located downstream of the flue gas flow to collect the sewage falling along the eaves of the dust reduction water tank.

[0029] As a preferred solution of the present invention, a filter disc driven by a motor is rotatably provided on the inner wall of the sedimentation tank, and the side wall of the filter disc slides in contact with the filter mesh surface provided at the end of the water filter pipe;

[0030] The contact surface between the filter disc and the water filter pipe is located above the axis of the filter disc, so that impurities adsorbed on the surface of the filter disc due to negative pressure are separated by the centrifugal action of rotation and sink to the bottom of the sedimentation box by inertia and gravity.

[0031] As a preferred solution of the present invention, two clips are provided in the sedimentation box, and the two clips are rotatably connected to the rotating shaft of the filter disc so that the two clips completely cover the portion of the filter disc below the axis;

[0032] Each of the clips is provided with evenly distributed bristles on the side wall close to the filter disc, and the length of the bristles is greater than the gap between the clip and the filter disc;

[0033] Wherein, the distribution diameter of the bristles on each of the clips is larger than the diameter of the filter disc.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention adopts an upper spraying method, so that the spraying water is dispersed and falls under the influence of gravity and air resistance to form multiple covering water flows, reduce the water flow gaps, and use the water film to make the freely falling water flow fall on the flowing water surface with lower impact, effectively avoiding splashing, thereby achieving good dust reduction and dust prevention effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0037] Figure 1 A schematic structural diagram of an upper spray dust suppression device in a flue provided by an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the structure of the corrugated surface portion of the upper spray-type dust suppression device in the flue provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the structure of the windshield of the upper spray dust suppression device in the flue provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the structure of a sedimentation filter box portion of an upper spray-type dust reduction device in a flue provided by an embodiment of the present invention;

[0041] Figure 5A schematic diagram of the structure of the filter disc portion of the upper spray-type dust suppression device in the flue provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the nozzle structure of the upper spray dust suppression device in the flue provided by an embodiment of the present invention;

[0043] Figure 7 A schematic structural diagram of the ball-pass portion of an upper spray-type dust suppression device in a flue provided by an embodiment of the present invention;

[0044] Figure 8 This is a partial structural diagram of the offset control mechanism of the upper spray dust suppression device in the flue provided by an embodiment of the present invention.

[0045] The numbers in the figure represent the following:

[0046] 1-Dust suppression water tank; 2-Sedimentation filter box; 3-High-pressure water pump; 4-Windshield; 5-Clamp; 6-Ball pass; 7-Deviation control mechanism; 8-Deviation plate; 9-Telescopic connector;

[0047] 11-water film outlet; 12-spray hole; 13-wave surface; 14-side overflow prevention plate; 21-sedimentation tank; 22-water filter tank; 23-water filter pipe; 24-sewage pipe; 25-water supply pipe; 26-filter plate; 41-vertical baffle; 42-anti-impact baffle; 43-splash prevention port; 51-brush;

[0048] 61-nozzle; 62-filter cover; 71-transverse plate clamp; 72-longitudinal plate clamp; 73-transverse adjustment screw; 74-longitudinal adjustment screw; 75-transverse motor; 76-longitudinal motor; 81-positioning hole; 82-positioning ball; 91-center rod; 92-sleeve; 93-tension spring. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] like Figure 1 As shown, the present invention provides an upper spray type dust suppression device in a flue, comprising:

[0051] The dust suppression water tank 1 is arranged in a preset groove at the bottom of the flue, and the upper surface of the dust suppression water tank 1 is flush with the bottom of the flue;

[0052] The sedimentation filter box 2 is arranged in a preset groove at the bottom of the flue, and is used to receive the dust-laden sewage produced by the dust suppression water tank 1;

[0053] The high-pressure water pump 3 is arranged outside the flue and connected to the dust suppression water tank 1 and the sedimentation filter box 2 through a pipeline. It is used to pump the water filtered by the sedimentation filter box 2 into the dust suppression water tank 1 and increase its internal pressure for recycling;

[0054] The upper surface of the dust suppression water tank 1 is inclined, and a water film outlet 11 is provided at the highest point of the upper surface of the dust suppression water tank 1, and a plurality of water spray holes 12 are evenly provided on the upper surface of the dust suppression water tank 1 with decreasing heights.

[0055] After the multiple water spray holes 12 are pressurized in the dust suppression water tank 1, they spray water upward to form a dust suppression area, so that the smoke in the smoke passing through the dust suppression area settles and falls to the upper surface of the dust suppression water tank 1 with the water;

[0056] After the water film outlet 11 is pressurized in the dust reduction water tank 1, water overflows upward and flows along the inclined upper surface of the dust reduction water tank 1 to form a flowing water film, so that the smoke and dust settled in the water and fell on the upper surface of the dust reduction water tank 1 are discharged into the sedimentation filter box 2 along with the flowing water film.

[0057] The dust reduction device of this embodiment mainly utilizes the high-pressure water pump 3 to increase the pressure of the dust reduction water tank 1, so that the multiple water spray holes 12 on the surface of the dust reduction water tank 1 spray upward to form a dust reduction area, so that the smoke and dust in the passing flue gas are captured and fall with the water flow, and the dust reduction water tank 1 is pressurized so that the water film outlet 11 overflows with water and flows along the inclined surface of the dust reduction water tank 1 to form a water film, and the falling sewage containing smoke and dust flows downstream with the water film and falls into the sedimentation filter box 2. After the sewage is filtered by the sedimentation filter box 2, it is pumped into the dust reduction water tank 1 again by the high-pressure water pump 3 to increase the pressure for recycling.

[0058] Among them, multiple water spray holes 12 are set on the surface of the dust reduction water tank 1 to spray upward, and since the upward spraying is affected by the flue gas flow, the water flow sprayed from each water spray hole 12 has a parabolic trajectory (because the flue gas flow velocity is slow at the turning point of the Venturi flue pipe and the desulfurization tower, the distance between the spray point and the landing point is close, and will not be blown out of the range of the dust reduction water tank 1 by the flue gas flow), that is, the water flow sprayed from each water spray hole 12 captures the smoke twice (the upward spraying stage and the falling stage), thereby improving the dust reduction effect of the spray water.

[0059] Since the water sprayed from the water hole 12 is upward, it needs to overcome gravity, so its speed gradually decreases, and since the water is subject to air flow resistance, the water flow is dispersed upward, that is, the water flow sprayed from the water hole 12 has a larger coverage area, so as to reduce the gap between the water flows in the dust reduction area, and further enhance its dust reduction effect.

[0060] Among them, when the pressure in the dust suppression water tank 1 is kept constant by the high-pressure water pump 3, since the hole area of ​​the multiple water spray holes 12 is much smaller than the area of ​​the water film outlet 11, the water spray holes 12 spray out water due to excessive pressure, and the water film outlet 11 overflows water due to insufficient pressure, thereby forming spray water and water film respectively.

[0061] The water film formed on the upper surface of the dust suppression water tank 1 has a certain flow rate, and the spray water falls freely, forming a low impact on the water film and submerging in the water film. Therefore, the water film can effectively prevent the spray water from falling and splashing, thereby preventing the water from splashing onto the flue wall and attracting smoke dust to adhere and deposit.

[0062] Since the water spray hole 12 is set on the surface of the dust reduction water tank 1, and the water overflowing from the water film outlet 11 flows along the surface of the dust reduction water tank 1, in order not to affect the water spraying effect of the water spray hole 12, the following preferred method is provided to optimize the surface of the dust reduction water tank 1.

[0063] like Figure 1 and Figure 2 As shown, the upper surface of the dust suppression water tank 1 is set as a wave surface 13, and the water spray hole 12 is set on the wave crest;

[0064] The crests and troughs of the wave surface 13 are both inclined downward.

[0065] Since the upper surface of the dust suppression water tank 1 is a wave surface 13 , the water overflowing from the water film outlet 11 flows downward along the trough of the wave surface 13 .

[0066] Moreover, since the water spray hole 12 is arranged on the wave crest and the water film and water flow flow along the wave trough, the water film and water flow do not affect the water spraying of the water spray hole 12.

[0067] The water holes 12 spray and cause the smoke and dust to fall with the water flow. Part of it falls directly into the trough and is washed away by the water film flow, while part of it falls on the crest. Due to its impact force, it slides along the crest wall into the trough and is washed away by the water film flow, thus achieving dust reduction treatment.

[0068] Furthermore, as shown in the figure, the cross-sectional width of the crest of the wave surface 13 is smaller than the cross-sectional width of the trough, and the net height of the crest of the wave surface 13 is smaller than the net depth of the trough.

[0069] The smaller cross-sectional width of the wave crest reduces the proportion of the falling water flow (sewage containing smoke and dust) falling on the wave crest, thereby reducing the probability of sewage falling directly on the wave crest; while the larger cross-sectional width of the wave trough can accommodate larger particles in the smoke and dust, that is, it can prevent the smoke and dust particles from being too large and clogging in the wave trough.

[0070] The smaller net height of the wave crest makes the water level of the water film flow in the trough closer to the top of the wave crest, so that the sewage falling on the wave crest can more easily enter the trough and be washed away; and the deeper net depth of the trough can further accommodate larger particles in the smoke and dust, that is, it can prevent the smoke and dust particles from being too large and clogging in the trough.

[0071] Since the water film outlet 11 is overflow water, if Figure 1 As shown, the upper surface of the dust suppression water box 1 is higher on the side located upstream of the flue gas flow than on the side located downstream of the flue gas flow, so that the water film outlet 11 is located upstream of the flue gas flow and the multiple water spray holes 12 are located downstream of the flue gas flow.

[0072] The overflowing water of the water film outlet 11 is affected by the flue gas flow and flows toward the side with the water spray hole 12, thereby preventing the overflowing water of the water film outlet 11 from overflowing unrestrictedly and falling into the flue.

[0073] In order to prevent the overflow water of the water film outlet 11 from being blown away by the flue gas flow, Figure 3 As shown, a windshield 4 for blocking the flue gas flow is provided on the upper surface of the dust suppression water box 1 at the edge of the water film outlet 11. The windshield 4 is located on one side edge of the water film outlet 11 facing the upstream of the flue gas flow.

[0074] The wind shield 4 can block the flue gas flow from blowing directly toward the water overflowing from the water film outlet 11 , thereby preventing the water overflowing from the water film outlet 11 from splashing and failing to completely cover the upper surface (or wave surface 13 ) of the dust suppression water tank 1 .

[0075] The wind shield 4 must be able to block the influence of the smoke flow and also need not affect the overflow of the water film outlet 11. Therefore, a preferred embodiment of the wind shield 4 is provided below.

[0076] like Figure 3 As shown, the windshield 4 includes a vertical baffle 41 vertically arranged at the edge of the water film outlet 11, and an anti-collision baffle 42 is provided at the upper end of the vertical baffle 41;

[0077] The anti-collision baffle 42 is arranged to be inclined toward the upper surface of the dust suppression water tank 1 .

[0078] The vertical baffle 41 can be set upstream of the flue gas flow to block the flue gas flow, and the anti-impact baffle 42 is set above the vertical baffle 41, which can further prevent the flue gas flow from impacting the overflow water flow of the water film outlet 11, and can block the overflow water of the water film outlet 11 when it surges, preventing it from overflowing.

[0079] The anti-collision baffle 42 is inclined toward the upper surface of the dust reduction water tank 1. Even when water gushes out of the water film outlet 11 and hits the anti-collision baffle 42, it cannot splash out because the impact angle is acute (reflection principle), so that the water flow at the water film outlet 11 always maintains a stable flow on the upper surface of the dust reduction water tank 1.

[0080] To further prevent water from spilling (or splashing) into the flue, Figure 3 As shown, side overflow prevention plates 14 are provided on both sides of the dust suppression water tank 1 and are attached to the inner wall of the flue. The upper ends of the side overflow prevention plates 14 are higher than the upper surface of the dust suppression water tank 1, and the side ends of the two side overflow prevention plates 14 extend out of the dust suppression water tank 1 to be attached to the side walls of the sedimentation filter box 2.

[0081] The two side overflow prevention plates 14 are connected and sealed to the side ends of the vertical baffle 41 and the anti-impact baffle 42 to form a splash-proof opening 43 between the anti-impact baffle 42 and the upper surface of the dust suppression water tank 1 .

[0082] The side overflow prevention plate 14 can prevent water from overflowing or splashing from the side end of the wind shield 4, and can prevent sewage falling on the upper surface of the dust reduction water tank 1 from splashing. The splash prevention port 43 allows water overflowing from the water film outlet 11 to flow along the upper surface of the dust reduction water tank 1 (or the trough of the wave surface 13), thereby avoiding splashing.

[0083] The flue gas flow flows over the top of the wind shield 4, and according to the Venturi effect, a negative pressure is formed at the splash guard 43, and the water overflowing from the water film outlet 11 is discharged from the splash guard 43. The negative pressure environment at the splash guard 43 can accelerate the discharge of water from the splash guard 43, thereby increasing the kinetic energy of the water outflow, so that the water can flow rapidly along the upper surface (or wave surface 13) of the dust reduction water tank 1, that is, it can effectively wash away larger and heavier smoke and dust particles, and prevent smoke and dust from accumulating on the upper surface of the dust reduction water tank 1 (or in the trough of the wave surface 13).

[0084] The water jet holes 12 are used to spray water jets to intercept smoke and dust. However, the angle of the water jet holes 12 is fixed, and the smoke exhaust has different flow rates under different production conditions. Excessive flow rates can cause the spray water jet to deviate and prevent it from falling on the water film formed on the surface of the dust suppression water tank 1. Therefore, in order to adjust the spray angle of the water jet according to smoke exhaust requirements, the following more preferred embodiment is provided.

[0085] like Figure 6 As shown, a ball tube 6 is rotatably provided in each water spray hole 12, and a nozzle 61 is provided through the hole on one side of the ball tube 6 located outside the dust suppression water tank 1;

[0086] A deflection plate 8 is provided inside the dust suppression water tank 1 , and a deflection control mechanism 7 for controlling the horizontal lateral and / or horizontal longitudinal movement of the deflection plate 8 is provided inside the dust suppression water tank 1 ;

[0087] The offset plate 8 is provided with a plurality of positioning holes 81, each of which is provided with a positioning ball 82 for rotation, and each positioning ball 82 is provided with a telescopic connection piece 9 between the ball passage 6 directly above the ball passage 6;

[0088] Among them, the offset control mechanism 7 controls the horizontal movement of the offset plate 8, so that the positioning ball 82 moves and pulls the ball tube 6 through the telescopic connecting member 9 to form a water level difference, so that the positioning ball 82 and the ball tube 6 both rotate, thereby causing the multiple nozzles 61 to rotate synchronously with the multiple ball tubes 6 to synchronously adjust the spray angle.

[0089] In this embodiment, the offset control mechanism 7 is used to control the horizontal movement of the offset plate 8, and the offset plate 8 drives the positioning ball 82 to move horizontally. Since the positioning ball 82 is connected to the ball channel 6 by a telescopic connecting member 9, when the horizontal spacing between the positioning ball 82 and the ball channel changes, the distance between the two increases, and the telescopic connecting member 9 is stretched, and the positioning ball 82 and the ball channel 6 both rotate. The rotation of the ball channel 6 will cause the nozzle 61 to rotate, that is, multiple nozzles 61 can be deflected synchronously to achieve synchronous adjustment of the spray angle.

[0090] In order to prevent the nozzle 61 from being blocked and affecting the effect of the spraying water column, Figure 7 As shown, a filter cover 62 is provided at the hole position of the ball tube 6 located inside the dust suppression water tank 1 , and the telescopic connector 9 is fixed on the filter cover 62 .

[0091] Since the source of the spray water is a water source containing a small amount of impurities such as sedimentation water and filtered water, the filter cover 62 is provided so that the water passing through the ball tube 6 is filtered by the filter cover 62, effectively preventing impurities in the spray water from passing through the ball tube 6 into the nozzle 61 and accumulating to clog the nozzle 61.

[0092] Furthermore, if Figure 7 As shown, the side where the filter cover 62 is fixed to the telescopic connector 9 is configured as a spherical arc surface, and the spherical arc surface and the surface of the ball channel 6 are configured to share a common spherical center.

[0093] The inlet side of the filter cover 62 adopts a spherical arc surface design, which can expand its filtering water inlet area, while the outlet side of the filter cover 62 is restricted by the ball 6, and its outlet area remains unchanged. The spherical arc surface filter cover 62 can carry more filtered impurities, thereby extending its service life and avoiding frequent replacement.

[0094] The telescopic connector 9 is used to connect the positioning ball 82 and the ball channel 6. When the positioning ball 82 moves horizontally, the telescopic connector 9 can pull the positioning ball 82 and the ball channel 6 to rotate and stretch itself to match the change in the distance between the two, thereby controlling the rotation of the ball channel 6 and causing the nozzle 61 to rotate synchronously. Therefore, the telescopic connector 9 needs to have a telescopic property. The following provides a preferred structure of the telescopic connector 9:

[0095] like Figure 7 As shown, the telescopic connecting member 9 includes a middle rod 91, both ends of the middle rod 91 are provided with sleeves 92, and a tension spring 93 is provided between the two sleeves 92 and is sleeved on the middle rod 91;

[0096] The two sleeves 92 are fixed on the ball socket 6 and the positioning ball 82 respectively.

[0097] When the positioning ball 82 moves horizontally, the distance between the positioning ball 82 and the ball duct 6 increases, causing the telescopic connector 9 to be stretched, that is, the two sleeves 92 move away from the middle rod 91 and stretch the tension spring 93 .

[0098] And because the telescopic connecting member 9 is located on the line connecting the centers of the spheres between the positioning ball 82 and the ball channel 6, when there is a horizontal position difference between the positioning ball 82 and the ball channel 6, the telescopic connecting member 9 tilts to cause both the positioning ball 82 and the ball channel 6 to rotate, thereby adjusting the spray angle of the nozzle 61.

[0099] When the offset control mechanism 7 controls the horizontal movement of the offset plate 8, in order to avoid mutual interference between the lateral movement and the longitudinal movement, the following preferred manner is provided.

[0100] like Figure 6 and Figure 8 As shown, the offset control mechanism 7 includes a transverse plate clamp 71 and a longitudinal plate clamp 72, and both the transverse plate clamp 71 and the longitudinal plate clamp 72 are centrally slidably clamped on the offset plate 8;

[0101] A transverse adjustment screw 73 is provided on the transverse plate clamp 71 for driving the horizontal transverse movement thereof, and a longitudinal adjustment screw 74 is provided on the longitudinal plate clamp 72 for driving the horizontal longitudinal movement thereof.

[0102] By rotating the lateral adjustment screw 73 to adjust the lateral movement of the lateral plate clamp 71, the offset plate 8 can be pushed to move laterally. By rotating the longitudinal adjustment screw 74 to adjust the longitudinal movement of the longitudinal plate clamp 72, the offset plate 8 can be pushed to move longitudinally.

[0103] Since the transverse plate clamp 71 and the longitudinal plate clamp 72 are both slidably clamped on the offset plate 8, the transverse movement of the offset plate 8 will not affect the longitudinal plate clamp 72, and the longitudinal movement of the offset plate 8 will not affect the transverse plate clamp 71, so the transverse adjustment screw 73 and the longitudinal adjustment screw 74 can maintain the same position, which is convenient for the setting of the drive components.

[0104] like Figure 6 and Figure 8 As shown, a horizontal motor 75 and a vertical motor 76 are respectively provided on the outside of the dust suppression water tank 1, and the smooth ends of both sides of the horizontal adjustment screw 73 are rotatably set on the dust suppression water tank 1, and one end of the horizontal adjustment screw 73 is fixedly connected to the shaft of the horizontal motor 75;

[0105] Both smooth ends of the longitudinal adjustment screw 74 are rotatably arranged on the dust suppression water tank 1, and one end of the longitudinal adjustment screw 74 is fixedly connected to the shaft of the longitudinal motor 76.

[0106] The transverse motor 75 is used to drive the transverse adjustment screw 73 to rotate, and the longitudinal motor 76 is used to drive the longitudinal adjustment screw 74 to rotate. Since the transverse adjustment screw 73 and the longitudinal adjustment screw 74 are fixed in position, the transverse motor 75 and the longitudinal motor 76 are both fixed on the outside of the dust reduction water tank 1, which has lower requirements for the waterproof level and lower usage costs.

[0107] The sedimentation filter box 2 is used to collect and process the sewage generated by the water film flow flushing from the upper surface (or wave surface 13) of the dust suppression water tank 1. The composition of the sedimentation filter box 2 is provided below.

[0108] like Figure 1 and Figure 4 As shown, the sedimentation filter box 2 includes a sedimentation box 21, a filter water box 22 is provided on the side wall of the sedimentation box 21, a filter water pipe 23 is provided between the sedimentation box 21 and the filter water box 22 to form an interconnection, and the filter water box 22 is connected to the negative pressure end of the high-pressure water pump 3 through a pipeline;

[0109] The upper end of the sedimentation tank 21 is uncovered, and a sewage pipe 24 with a valve is provided at the lower end of the sedimentation tank 21. A water supply pipe 25 with a valve is provided on the filter water tank 22.

[0110] Among them, the side wall of the dust reduction water tank 1 located downstream of the flue gas flow is concave, so that the upper surface of the dust reduction water tank 1 forms an eaves structure, and the sedimentation box 21 is installed against the side wall of the dust reduction water tank 1 located downstream of the flue gas flow to collect the sewage falling along the eaves of the dust reduction water tank 1.

[0111] The sedimentation tank 21 is used to allow the smoke and dust particles in the sewage to settle to the bottom of the sedimentation tank 21 by gravity. The filter pipe 23 can prevent the smoke and dust particles from entering the filter water box 22, and the filter water box 22 pumps the filtered water back into the dust reduction water tank 1 for reuse through the high-pressure water pump 3.

[0112] The sewage pipe 24 is opened after a long period of sedimentation treatment in the sedimentation tank 21 to discharge the smoke and dust particles deposited at the bottom of the sedimentation tank 21; the water supply pipe 25 replenishes water into the filter water tank 22 when discharging sewage to maintain the system's circulating water volume, and can provide a pumping water source for the high-pressure water pump 3 through the water supply pipe 25 when the sewage pipe 24 is opened, so that sewage discharge does not interfere with the dust reduction function.

[0113] During use, the water filter pipe 23 is easily clogged by smoke particles in the sedimentation box 21, and thus needs to be replaced frequently to ensure its filtering performance and water permeability. Therefore, the following provides a preferred method to extend the service life of the water filter pipe 23.

[0114] The eaves structure formed at the lowest end of the upper surface of the dust suppression water tank 1 can make the water film and water flow fall completely into the sedimentation box 21, and can be set into an S-shaped slow flow structure at the tail end of the wave surface 13, which can effectively reduce the water flow speed before the water film and water flow leave the wave surface 13, thereby shortening the drainage distance and reducing the kinetic energy of the sewage, and avoiding sewage splashing.

[0115] It is worth noting that the sedimentation tank 21 and the water filter tank 22 can be an integrated structure, that is, two chambers of a box body, which is more convenient to assemble, but the manufacturing difficulty will increase.

[0116] like Figure 5 As shown, a filter disc 26 driven by a motor is rotatably provided on the inner wall of the sedimentation box 21, and the side wall of the filter disc 26 slides in contact with the filter mesh surface provided at the end of the water filter pipe 23;

[0117] The contact surface between the filter disc 26 and the filter pipe 23 is located above the axis of the filter disc 26, so that impurities adsorbed on the surface of the filter disc 26 due to negative pressure are separated by the centrifugal action of rotation and sink to the bottom of the sedimentation box 21 by inertia and gravity.

[0118] Negative pressure is generated in the filter water box 22 by the high-pressure water pump 3, so negative pressure is generated in the filter water pipe 23. Since the filter disc 26 rotates closely against the filter water pipe 23, the sewage in the sedimentation tank 21 is first filtered through the filter disc 26, and then filtered through the filter water pipe 23 to enter the filter water box 22, which not only forms a double filtration, but also can prevent the filter water pipe 23 from being quickly blocked.

[0119] Since the filter disc 26 is rotated by the motor, the blocked area rotates downward, so that the smoke particles on the filter disc 26 lose the negative pressure suction and fall off the surface of the filter disc 26. The smoke particles move to the bottom of the sedimentation box 21 under the action of centrifugal inertia and complete sedimentation, so that the filter disc 26 is continuously and automatically cleaned to protect the water filter pipe 23.

[0120] The bottom of the sedimentation box 21 is closed, and the upper end of the sedimentation box 21 falls into the sewage. Therefore, the water flows along the upper end of the sedimentation box 21 to the water filter pipe 23. Therefore, the water fluidity at the bottom of the sedimentation box 21 is poor, which is conducive to the sedimentation of smoke particles and not easy to surge.

[0121] Due to the negative pressure in the water filter pipe 23, some smoke particles are stuck in the mesh of the filter disc 26. Therefore, a preferred method is provided below to clean the smoke particles in the mesh of the filter disc 26.

[0122] like Figure 5 As shown, two clips 5 are provided in the sedimentation box 21, and the two clips 5 are rotatably connected to the rotating shaft of the filter disc 26 so that the two clips 5 completely cover the portion of the filter disc 26 below the axis;

[0123] Each clip 5 is provided with evenly distributed bristles 51 on the side wall close to the filter disc 26, and the length of the bristles 51 is greater than the gap between the clip 5 and the filter disc 26;

[0124] The distribution diameter of the bristles 51 on each clip 5 is larger than the diameter of the filter disc 26 .

[0125] When the filter disc 26 rotates, the area with smoke particles adhering to it moves downward and passes between the two clips 5, and the bristles 51 on the inner side of the clip 5 slide relative to the rotating filter disc 26, so that the bristles brush off the smoke particles adhering to the filter disc 26. Since the length of the bristles 51 is greater than the gap between the filter disc 26 and the clip 5, the bristles 51 have elastic force during the brushing process and can be inserted into the mesh of the filter disc 26 to push out the blocked smoke particles, thereby improving the effect of the bristles 51 in brushing off the smoke particles on the filter disc 26.

[0126] Since the bristles 51 are distributed on the inner walls of the two clamps 5 and the filter disc 26 rotates between the two clamps 5, the fluctuations between the two clamps 5 caused by the rotation of the filter disc 26 are smoothed by the multiple bristles 51, that is, the rotation of the filter disc 26 has little effect on the bottom of the sedimentation box 21, and the smoke and dust particles brushed off by the filter disc 26 are blocked by the bristles 51 and cannot fly away, and only slowly settle along the gaps between the bristles 51 under the action of gravity.

[0127] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A dust suppression device with an upper spraying type in a flue, characterized in that: include: A dust suppression water tank (1), the dust suppression water tank (1) being arranged in a preset groove at the bottom of the flue, and the upper surface of the dust suppression water tank (1) being flush with the bottom of the flue; A sedimentation filter box (2) is arranged in a preset groove at the bottom of the flue, and is used to receive the dust-containing sewage generated by the dust reduction water tank (1); a high-pressure water pump (3), arranged outside the flue, and connected to the dust suppression water tank (1) and the sedimentation filter box (2) via a pipeline, for pumping water filtered by the sedimentation filter box (2) into the dust suppression water tank (1) and increasing the internal pressure thereof for recycling; The upper surface of the dust suppression water tank (1) is arranged at an angle, and a water film outlet (11) is provided at the highest point of the upper surface of the dust suppression water tank (1), and a plurality of water spray holes (12) are evenly provided on the upper surface of the dust suppression water tank (1) with successively decreasing heights. After the multiple water spray holes (12) are pressurized in the dust reduction water tank (1), they spray water upward to form a dust reduction area, so that the smoke dust in the smoke passing through the dust reduction area settles and falls with the water to the upper surface of the dust reduction water tank (1); After the water film outlet (11) is pressurized in the dust reduction water tank (1), water overflows upward and flows along the inclined upper surface of the dust reduction water tank (1) to form a flowing water film, so that the smoke and dust settled in the water and landed on the upper surface of the dust reduction water tank (1) flows along with the flowing water film and is discharged into the sedimentation filter box (2); The upper surface of the dust suppression water tank (1) is arranged as a wave surface (13), and the water spray hole (12) is arranged on the wave crest; The crests and troughs of the wave surface (13) are both tilted downward, and the water overflowing from the water film outlet (11) flows downward along the troughs of the wave surface (13); The cross-sectional width of the crest of the wave surface (13) is smaller than the cross-sectional width of the trough, and the net height of the crest of the wave surface (13) is smaller than the net depth of the trough; The upper surface of the dust suppression water box (1) is located at a side upstream of the flue gas flow that is higher than the side downstream of the flue gas flow, so that the water film outlet (11) is located upstream of the flue gas flow, and the plurality of water spray holes (12) are located downstream of the flue gas flow.

2. The dust suppression device for flue top spraying according to claim 1, characterized in that: A windshield (4) for blocking the flue gas flow is provided on the upper surface of the dust suppression water box (1) at the edge of the water film outlet (11). The windshield (4) is located at the edge of one side of the water film outlet (11) facing the upstream of the flue gas flow.

3. The upper spray dust suppression device in the flue according to claim 2, characterized in that: The windshield (4) comprises a vertical baffle (41) vertically arranged at the edge of the water film outlet (11), and an anti-collision baffle (42) is arranged at the upper end of the vertical baffle (41); Wherein, the anti-collision baffle (42) is arranged to be inclined toward the upper surface of the dust suppression water tank (1).

4. The upper spray dust suppression device in the flue according to claim 3, characterized in that: Anti-side overflow plates (14) are provided on both sides of the dust suppression water tank (1) and are attached to the inner wall of the flue. The upper ends of the anti-side overflow plates (14) are higher than the upper surface of the dust suppression water tank (1), and the side ends of the two anti-side overflow plates (14) extend out of the dust suppression water tank (1) to be attached to the side walls of the sedimentation filter box (2). The two side overflow prevention plates (14) are connected and sealed to the side ends of the vertical baffle (41) and the anti-impact baffle (42) to form an anti-splash opening (43) between the anti-impact baffle (42) and the upper surface of the dust suppression water tank (1).

5. The upper spray dust suppression device in the flue according to claim 1, characterized in that: The sedimentation filter box (2) comprises a sedimentation box (21), a water filter box (22) is provided on a side wall of the sedimentation box (21), a water filter pipe (23) is provided between the sedimentation box (21) and the water filter box (22) to form mutual communication, and the water filter box (22) is connected to the negative pressure end of the high-pressure water pump (3) through a pipeline; The upper end of the sedimentation box (21) has no cover, and the lower end of the sedimentation box (21) is provided with a sewage pipe (24) with a valve, and the filter water box (22) is provided with a water supply pipe (25) with a valve; The side wall of the dust reduction water tank (1) located downstream of the flue gas flow is concave, so that the upper surface of the dust reduction water tank (1) forms an eaves structure, and the sedimentation box (21) is installed against the side wall of the dust reduction water tank (1) located downstream of the flue gas flow to receive the sewage falling from the dust reduction water tank (1) along the eaves.

6. The upper spray dust suppression device in the flue according to claim 5, characterized in that: A filter disc (26) driven by a motor is rotatably provided on the inner wall of the sedimentation box (21), and the side wall of the filter disc (26) slides in contact with a filter mesh surface provided at the end of the water filter pipe (23); The contact surface between the filter disc (26) and the filter pipe (23) is located above the axis of the filter disc (26), so that impurities adsorbed on the surface of the filter disc (26) due to negative pressure are separated by the centrifugal action of rotation and sink to the bottom of the sedimentation box (21) by inertia and gravity.

7. The upper spray dust suppression device in the flue according to claim 6, characterized in that: Two clips (5) are provided in the sedimentation box (21), and the two clips (5) are rotatably connected to the rotating shaft of the filter disc (26) so that the two clips (5) completely cover the portion of the filter disc (26) located below the axis; Each of the clips (5) is provided with evenly distributed bristles (51) on the side wall close to the filter disc (26), and the length of the bristles (51) is greater than the gap distance between the clip (5) and the filter disc (26); Wherein, the distribution diameter of the bristles (51) on each of the clips (5) is greater than the diameter of the filter disc (26).

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