Roof ridge-type defogger for a desulfurization tower

Abstract

Roof ridge type demister for a desulfurization tower, characterized in that it comprises: a mist extraction section (1) installed in the desulfurization tower to adsorb and remove dust-containing mist droplets in the flue gas, comprising two parallel arranged lateral bottom plates (11), wherein the length direction of the two lateral bottom plates (11) is in an X-axis direction and a center plate (12) is provided between the two lateral bottom plates (11), wherein the center plate (12) is perpendicular to the lateral bottom plates (11) and is located in the upper region between the two lateral bottom plates (11), thereby forming a triangular arrangement with the two lateral bottom plates; wherein slats (13) are arranged at equal distances between the lateral base plates (11) and the central plate (12), the gap between each two adjacent slats (13) forming a shock channel (14) for the flue gas; wherein the length direction of the slats (13) extends in a Y-axis direction and the direction in which the slats (13) are arranged at an equal distance extends in the X-axis direction; wherein the slats (13) each have an offset center of gravity and are rotatably connected between the respective lateral base plates (11) and the center plate (12), wherein in the natural state the slats (13) are arranged obliquely and under the action of a negative pressure air flow the slats (13) carry out an oscillating movement in order to prevent dust-containing mist droplets from adhering to the slats (13) and forming incrustations and blockages.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of demisters, in particular to a ridge-type demister for a desulfurization tower. STATE OF THE ART

[0002] Roof-ridge-type defoggers typically consist of multiple layers of defogging modules, with modules in each layer positioned in a roof-ridge-like arrangement. A common configuration comprises two layers of defogging modules with three layers of water purge pipes. This design enables efficient removal of liquid droplets from the flue gas while simultaneously reducing secondary ingress.

[0003] However, conventional roof-ridge-type defoggers use fixed louvers whose wave-like structure results in twisted channels between two adjacent louvers. This makes flue gas or sprayed slurry prone to sticking in the ducts and causing blockages. This not only impairs defogging efficiency but also increases maintenance costs. DISCLOSURE OF THE INVENTION

[0004] In view of the above problem of existing roof-ridge type demisters for desulfurization towers, the present invention was proposed.

[0005] The technical problem described above is solved by the following technical solution: the present invention proposes a roof-ridge-type demister for a desulfurization tower. It comprises: a mist extraction section installed in the desulfurization tower to adsorb and remove dust-containing mist droplets in the flue gas, comprising two parallel side bottom plates, the length direction of the two side bottom plates being in an X-axis direction, and a center plate being provided between the two side bottom plates, the center plate being perpendicular to the side bottom plates and located at the top between the two side bottom plates, thereby forming a triangular arrangement with the two side bottom plates; wherein fins are arranged at equal intervals between the side bottom plates and the center plate, the gap between any two adjacent fins forming a flue gas impact channel;wherein the length direction of the louvers extends in a Y-axis direction and the direction in which the louvers are arranged at equal intervals extends in the X-axis direction; wherein the louvers each have a center of gravity offset and are rotatably connected between the respective side base plates and the center plate, wherein in the natural state the louvers are arranged obliquely and under the action of a negative pressure air flow the louvers perform a swinging movement to prevent dust-containing mist droplets from adhering to the louvers and forming incrustations and blockages.

[0006] In a preferred embodiment of the roof ridge-type demister for a desulfurization tower according to the invention, it is provided that the individual louver comprises an arcuate plate, wherein a cylindrical rotary element is provided on one side of the upper end of the arcuate plate, wherein the length direction of the cylindrical rotary element runs in the Y-axis direction and the cylindrical rotary element has the same length as the arcuate plate; wherein a vertical line passing through the central axis of the cylindrical rotary element is on one side of the respective louver, thereby creating a center of gravity offset, and a cylindrical weight element is provided below along the vertical line passing through the central axis of the cylindrical rotary element.

[0007] In a preferred embodiment of the roof ridge-type demister according to the invention for a desulfurization tower, it is provided that the weight of the cylindrical weight element is greater than that of the arcuate sheet in order to change the center of gravity position of the respective lamella and thereby cause an inclination of the respective lamella in the natural state.

[0008] In a preferred embodiment of the roof ridge-type demister according to the invention for a desulfurization tower, it is provided that a torsion bar is fastened to each end of the cylindrical rotating element and a rotary bore is formed in both the individual lateral base plate and the center plate, in which the respective torsion bar can rotate.

[0009] In a preferred embodiment of the roof ridge-type demister according to the invention for a desulfurization tower, it is provided that a limiting component is provided between the individual lateral base plate and the center plate, which serves to limit the angle of movement of the respective lamella.

[0010] In a preferred embodiment of the roof ridge type demister for a desulfurization tower according to the invention, the demister further comprises a flushing section comprising an upper flushing mechanism and a lower flushing mechanism, each of which flushes the side walls of the fins in the impact channels.

[0011] In a preferred embodiment of the roof ridge type demister for a desulfurization tower according to the invention, it is provided that the upper flushing mechanism comprises a plurality of first water supply pipes, wherein a plurality of first nozzles are mounted at the same distance from one another at the bottom of the single first water supply pipe.

[0012] In a preferred embodiment of the roof ridge type demister for a desulfurization tower according to the invention, it is provided that the lower flushing mechanism comprises a plurality of second water supply pipes, wherein a plurality of second nozzles are mounted at equal intervals on the upper side of the single second water supply pipe.

[0013] In a preferred embodiment of the roof ridge-type demister for a desulfurization tower according to the invention, it is provided that the length directions of both the first water supply pipes and the second water supply pipes run along the X-axis and the plurality of first water supply pipes and second water supply pipes are arranged obliquely and are located above and below the fins, respectively.

[0014] In a preferred embodiment of the roof ridge-type demister according to the invention for a desulfurization tower, it is provided that the first nozzles and the second nozzles have opposite angles of inclination in order to rinse opposite surfaces of two adjacent lamellae.

[0015] Advantageous effects of the present invention: The present invention utilizes the offset center of gravity of the vanes, allowing the vanes to perform oscillating and shaking movements under the influence of the gas flow. This changes the impact point of the gas flow, reducing long-term dust adhesion in the mist droplets and effectively preventing encrustation and clogging. At the same time, the falling of the liquid droplets is accelerated, increasing demisting efficiency and reducing maintenance costs. PRESENTATION OF THE INVENTION

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention are briefly described below. It should be understood that the accompanying drawings in the following description relate only to some embodiments of the present invention and are not a limitation of the invention.

[0017] Showing Fig. 1 a three-dimensional structural view of a ridge-type demister for a desulfurization tower; Fig. 2 is a structural view of a mist extraction section in the ridge-type demister for a desulfurization tower; Fig. 3 is a structural view of a boundary component in the ridge-type demister for a desulfurization tower; Fig. 4 is a structural view of a louver in the ridge-type demister for a desulfurization tower; Fig. 5 is a structural view of a purge section in the ridge-type demister for a desulfurization tower. CONCRETE EMBODIMENTS

[0018] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in more detail below in conjunction with certain embodiments and the accompanying drawings.

[0019] The terms used in the present invention are the general terms currently widely used in the field in consideration of the functions related to the present invention, but these terms may be varied in accordance with the intention of a person of ordinary skill in the art, precedents, or new technology in the field. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the description should not be construed as simple labels, but are based on the meaning of the terms and the general description of the present invention.

[0020] It will be Fig. 1 to 5. The present embodiment provides a roof-ridge-type demister for a desulfurization tower. It comprises: a mist extraction section 1 installed in the desulfurization tower to adsorb and remove dust-containing mist droplets in the flue gas, comprising two side bottom plates 11 arranged in parallel, the length direction of the two side bottom plates 11 being in an X-axis direction, and a center plate 12 being provided between the two side bottom plates 11, the center plate 12 being perpendicular to the side bottom plates 11 and located at the top between the two side bottom plates 11, thereby forming a triangular arrangement with the two side bottom plates.

[0021] Lamellae 13 are arranged at equal distances between the side base plates 11 and the center plate 12. The gap between any two adjacent lamellae 13 forms a discharge channel 14 for the flue gas. Under the influence of negative pressure, flue gas containing fog flows from bottom to top and enters the discharge channels 14. As it passes through the discharge channels 14, the fog-containing flue gas bounces against the inner walls of the discharge channels 14 and adheres to them. As this adhesion increases, smaller fog droplets coalesce to form larger liquid droplets. As the gravity of the droplets exceeds the surface tension and the gas flow forces, the droplets slide down the inner walls of the discharge channels 14 and collect in a sludge basin located below. This achieves gas-liquid separation, which creates the demisting effect.

[0022] The length direction of the slats 13 extends in a Y-axis direction and the direction in which the slats 13 are arranged at an equal distance extends in the X-axis direction.

[0023] The slats 13 each have a center of gravity offset and are rotatably connected between the respective lateral base plates 11 and the center plate 12. In their natural state, the slats 13 are arranged at an angle, and under the influence of a negative pressure air flow, the slats 13 perform a swinging motion to prevent dust-containing mist droplets from adhering to the slats 13 and forming incrustations and blockages.

[0024] In detail, the fog-laden flue gas flows upwards, creating a gas flow. Because the louvers 13 are arranged at an angle and are rotatably connected to the side base plates 11 and the center plate 12, the rising gas flow impacts the louvers 13 as it passes through the impact channels 14. Depending on the flow strength, the louvers 13 oscillate around their pivot points as support points with a corresponding amplitude. This oscillation changes the impact point of the gas flow, which can prevent dust particles in the flue gas from continuously hitting the same spots and forming fixed adhesion points that would lead to blockages. In addition, the louvers 13 have a center of gravity offset. If the impact force of the flue gas exceeds the force of the center of gravity of the individual louver 13, the louver 13 rotates.When the impact force of the flue gas is less than the force of the center of gravity of each fin 13, the fin 13 will naturally retract. Since the flue gas flow force is not constant, this causes the fins 13 to vibrate continuously, causing the fins 13 to shake. During vibration, the adhering liquid droplets fall off at an accelerated rate, shortening the adhesion time. This avoids the problem of dust from the liquid droplets adhering tightly and then continuously growing due to prolonged impact and adhesion.

[0025] The single slat 13 comprises an arcuate plate 131. A cylindrical rotating element 132 is provided on one side of the upper end of the arcuate plate 131. The length direction of the cylindrical rotating element 132 is in the Y-axis direction, and the cylindrical rotating element 132 has the same length as the arcuate plate 131.

[0026] A vertical line passing through the center axis of the cylindrical rotating element 132 is positioned on one side of the respective slat 13, creating a center of gravity offset. A cylindrical weight element 133 is provided at the bottom along the vertical line passing through the center axis of the cylindrical rotating element 132.

[0027] Specifically, the arcuate sheet 131, the cylindrical rotating element 132 and the cylindrical weight element 133 are made of polypropylene by injection molding in one piece, which ensures corrosion resistance and overall stability.

[0028] The weight of the cylindrical weight element 133 is greater than that of the arcuate sheet 131 in order to change the center of gravity of the respective slat 13 and thereby cause an inclination of the respective slat 13 in the natural state.

[0029] Specifically, a steel cylinder body is axially embedded in the cylindrical weight element 133 in order to increase the weight of the cylindrical weight element 133 and thus ensure the inclination of the respective slat in the natural state; Force analysis:Gravity effect:

[0030] The center of gravity offset of the individual slat 13 means that the center of gravity of the slat 13 is not located in the geometric center, but is offset laterally. In its natural state, the individual slat 13 tilts due to the effect of gravity.

[0031] The cylindrical weight element 133 acts as a gravitational force G directly on the center of gravity of the respective slat 13 and points vertically downwards. Gas flow shock force:

[0032] When fog-containing flue gas flows through the individual impact channel 14, the gas flow exerts an impact force F on the individual louvre 13. The direction of the impact force F corresponds to the gas flow direction, and the magnitude varies with the flow velocity and density.

[0033] The impact force F acts on the surface of the individual slat 13, so that the slat 13 is subjected to an upward force. Oscillation and return of the slat:

[0034] If the gas flow impact force F is greater than the gravity force G of the center of gravity of the slat 13, the slat 13 swings upwards around its pivot point.

[0035] If the gas flow impact force F is smaller than the gravity force G of the center of gravity of the slat 13, the slat 13 naturally returns due to the effect of gravity.

[0036] Since the gas flow impact force is not constant, the lamella continuously performs small oscillations under the influence of the impact force and gravity. Effect of shaking:

[0037] The offset of the center of gravity of each louvre 13 causes the louvre 13 to vibrate slightly under the influence of the gas flow surge. This vibration changes the impact point of the flue gas flow and prevents the accumulation of fog droplets from acting on the same spot for extended periods, thus reducing the likelihood of incrustation.

[0038] The shaking also accelerates the falling off of the drops adhering to the individual slat 13, shortens the time the drops adhere to the slat and prevents dust from the drops from adhering firmly and constantly growing. Advantages of the center of gravity offset

[0039] The above force analysis clearly demonstrates the advantages of offsetting the center of gravity of the slats: Reduction of incrustations: The vibrations and shaking of the slats 13 change the impact point of the gas flow, preventing dust from the mist droplets from acting on the same spot for a long time, thus reducing the likelihood of incrustations.

[0040] Accelerated droplet deposition: Shaking causes liquid droplets adhering to the individual slat 13 to deposition more quickly, which shortens the time the droplets remain attached to the slat and prevents dust from the droplets from adhering firmly and constantly growing.

[0041] Increased defogging efficiency: By reducing incrustations and droplet adhesion to the individual louvre 13, gas-liquid separation can be achieved more effectively through the louvre 13, which increases defogging efficiency.

[0042] A torsion bar 134 is attached to each end of the cylindrical rotating element 132, and a rotary bore 15 is formed in both the individual lateral base plate 11 and the center plate 12, in which the respective torsion bar 134 can rotate. When the individual slat 13 rotates, it rotates around the respective torsion bar 134 as a support point.

[0043] Between the individual lateral base plate 11 and the central plate 12, a limiting component 16 is provided, which serves to limit the angle of movement of the respective slat 13.

[0044] Specifically, the limiting component 16 comprises a guide groove and cylindrical guide elements attached to both sides of the base of the arcuate sheet 131. The guide groove has an arcuate structure. In its natural state, the cylindrical guide elements are located in the center of the arcuate structure. In the event of a gas flow surge, this arrangement enables a defined vibration range for the respective lamella 13. Optional implementation example:

[0045] It will be Fig. 1 and Fig. 5. In one embodiment of the present application, a ridge-type demister for a desulfurization tower further comprises a purging section 2 having an upper purging mechanism 21 and a lower purging mechanism 22, which respectively purge the side walls of the fins 13 in the impact channels 14.

[0046] The upper flushing mechanism 21 includes a plurality of first water supply pipes 211. At the bottom of the single first water supply pipe 211, a plurality of first nozzles 212 are mounted at equal intervals.

[0047] Specifically, the single first water supply pipe 211 is connected to an external water source and serves as a flushing water supply. The single first water supply pipe 211 is suspended from a portal frame 213, with both ends of the portal frame 213 being mounted above the two side floor panels 11. The single first water supply pipe 211 is fixedly mounted to the portal frame 213 via a suspension rod.

[0048] The lower flushing mechanism 22 includes a plurality of second water supply pipes 221. On top of the single second water supply pipe 221, a plurality of second nozzles 222 are mounted at equal intervals.

[0049] Specifically, the single second water supply pipe 221 is connected to an external water source and serves as a flushing water supply. The single second water supply pipe 221 is mounted on the bottom of the respective slat 13 via a support rod 223.

[0050] The length directions of both the first water supply pipes 211 and the second water supply pipes 221 run along the X-axis, and the plurality of first water supply pipes 211 and second water supply pipes 221 are arranged obliquely and are located above and below the slats 13, respectively. This allows the first nozzles 212 and the second nozzles 222 to be positioned in close proximity to the slats 13, which increases the flushing intensity.

[0051] The first nozzles 212 and the second nozzles 222 have opposite inclination angles to rinse opposite surfaces of two adjacent louvers 13. During the flushing process, the upper flushing mechanism 21 is first activated and the water flow is regulated. The water jet strikes one side of the individual louver 13 and causes it to rotate around its pivot point as a support point toward the cylindrical weight element 133, thereby creating an inclination. This process continuously changes the location at which the water jet flushes one side of the respective louver 13, which expands the flushing area and increases the flushing efficiency of the louver 13. After cleaning one side of the respective louver 13 is completed, the upper flushing mechanism 21 is deactivated.

[0052] Subsequently, the lower flushing mechanism 22 is activated. Since the first nozzles 212 and the second nozzles 222 have opposite inclination angles, the sprayed water jet causes the slat 13 to rotate in the opposite direction around its pivot point as a support point, away from the cylindrical weight element 133, allowing the other side of the slat 13 to be flushed with the water jet. This can thus increase the flushing efficiency of the slat 13.

[0053] Finally, it should be noted that the methods and devices described in detail above are only exemplary embodiments and that those skilled in the art will be able to modify these exemplary embodiments in various ways as long as they do not deviate from the scope of the present invention.

Claims

[1] Roof ridge-type defogger for a desulfurization tower, characterized by that it includes: a mist extraction section (1) installed in the desulfurization tower to adsorb and remove dust-containing mist droplets in the flue gas, comprising two parallel arranged lateral bottom plates (11), wherein the length direction of the two lateral bottom plates (11) is in an X-axis direction and a center plate (12) is provided between the two lateral bottom plates (11), wherein the center plate (12) is perpendicular to the lateral bottom plates (11) and is located in the upper region between the two lateral bottom plates (11), thereby forming a triangular arrangement with the two lateral bottom plates; wherein slats (13) are arranged at equal distances between the lateral base plates (11) and the central plate (12), the gap between each two adjacent slats (13) forming a shock channel (14) for the flue gas; wherein the length direction of the slats (13) extends in a Y-axis direction and the direction in which the slats (13) are arranged at an equal distance extends in the X-axis direction; wherein the slats (13) each have an offset center of gravity and are rotatably connected between the respective lateral base plates (11) and the center plate (12), wherein in the natural state the slats (13) are arranged obliquely and under the action of a negative pressure air flow the slats (13) carry out an oscillating movement in order to prevent dust-containing mist droplets from adhering to the slats (13) and forming incrustations and blockages. [2] Roof ridge type demister for a desulfurization tower according to claim 1, characterized by in that the individual slat (13) comprises an arcuate sheet (131), wherein a cylindrical rotary element (132) is provided on one side of the upper end of the arcuate sheet (131), wherein the length direction of the cylindrical rotary element (132) runs in the Y-axis direction and the cylindrical rotary element (132) has the same length as the arcuate sheet (131); wherein a vertical line running through the central axis of the cylindrical rotary element (132) is on one side of the respective slat (13), thereby creating an offset of the center of gravity, and a cylindrical weight element (133) is provided below along the vertical line running through the central axis of the cylindrical rotary element (132). [3] Roof ridge type demister for a desulphurisation tower according to claim 2, characterized bythat the weight of the cylindrical weight element (133) is greater than that of the arcuate sheet (131) in order to change the center of gravity of the respective slat (13) and thereby cause an inclination of the respective slat (13) in the natural state. [4] Roof ridge type demister for a desulphurisation tower according to claim 3, characterized by that a torsion bar (134) is fastened to each of the two ends of the cylindrical rotary element (132) and that a rotary bore (15) is formed in both the individual lateral base plate (11) and the central plate (12), in which the respective torsion bar (134) can rotate. [5] Roof ridge type demister for a desulphurisation tower according to claim 4, characterized by that a limiting component (16) is provided between the individual lateral base plate (11) and the central plate (12), which serves to limit the angle of movement of the respective slat (13). [6] Roof ridge type demister for a desulphurisation tower according to claim 1, characterized by in that it further comprises a rinsing section (2) comprising an upper rinsing mechanism (21) and a lower rinsing mechanism (22) which respectively rinse the side walls of the slats (13) in the impact channels (14). [7] Roof ridge type demister for a desulphurisation tower according to claim 6, characterized by that the upper flushing mechanism (21) comprises a plurality of first water supply pipes (211), wherein a plurality of first nozzles (212) are mounted at the bottom of the single first water supply pipe (211) at equal intervals. [8] Roof ridge type demister for a desulphurisation tower according to claim 7, characterized by in that the lower flushing mechanism (22) comprises a plurality of second water supply pipes (221), wherein a plurality of second nozzles (222) are mounted at equal intervals on the upper side of the single second water supply pipe (221). [9] Roof ridge type demister for a desulphurisation tower according to claim 8, characterized by that the length directions of both the first water supply pipes (211) and the second water supply pipes (221) run along the X-axis and the plurality of first water supply pipes (211) and second water supply pipes (221) are arranged obliquely and are located above and below the slats (13), respectively. [10] Roof ridge type demister for a desulphurisation tower according to claim 9, characterized by that the first nozzles (212) and the second nozzles (222) have opposite angles of inclination in order to rinse opposite surfaces of two adjacent slats (13).

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