Rotational flow flue gas purification tower tray

Abstract

The invention discloses a rotational flow flue gas purification tower tray which is characterized by comprising one or more rotational flow single bodies, each rotational flow single body is of a big-end-up cone frustum structure, the middle of each rotational flow single body is hollow, the side wall of each rotational flow single body is composed of a plurality of impeller blades, the upper end face of the side wall of each rotational flow single body is sealed through an upper sealing plate, and the lower end face of each rotational flow single body is sealed through a lower sealing plate. The circular bottom face of the cone frustum structure formed by the rotational flow single bodies is sealed through a lower sealing plate, and the upper ends and the lower ends of the impeller blades are located on the upper sealing plate and the lower sealing plate respectively. The rotational flow flue gas purification tower tray adopts a cone frustum type rotational flow structure consisting of impeller blades, so that flue gas and slurry generate two-phase rotational flow to wash the flue gas, the pollutant removal efficiency is far higher than that of a bubbling type removal mode of a round hole tower tray and is not lower than that of a turbulator, but the running resistance is lower than that of the turbulator, and the smoke purification effect is greatly improved. The manufacturing cost of the turbulator is lower than that of a traditional turbulator, and the turbulator has remarkable advantages.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and in particular to a cyclone flue gas purification tower plate. Background Art

[0002] Wet desulfurization is the most widely used and most mature desulfurization technology so far. During the operation of the desulfurization tower, after the original flue gas enters the absorption tower from the original flue, the flue gas is not evenly distributed, and there is a large deviation, which also leads to a decrease in the overall desulfurization efficiency. In order to achieve uniform distribution of flue gas in the cross-section of the desulfurization tower, some auxiliary desulfurization devices are produced, such as desulfurization trays and turbulators.

[0003] Traditional desulfurization trays use sieve plates with a large opening rate to be arranged on the entire cross-section of the desulfurization tower. For those with high desulfurization efficiency requirements, two-layer trays are generally used. This device can improve the slurry flow and reaction conditions and improve the desulfurization efficiency. At the same time, the tray can also guide the flue gas to be evenly distributed in the tower, so that the flue gas and slurry are fully in contact, which is beneficial to improving the desulfurization effect. However, when the flow rate is high or the slurry spray volume is large, it is easy to cause flooding, resulting in unstable resistance.

[0004] The turbulator, namely the swirl coupling technology, developed by Beijing Qingxin Environmental Technology Co., Ltd., has been applied in many projects. However, according to the survey, the sulfur content and load fluctuations of some projects are more obvious, and considering the subsequent deep peak regulation, the slurry circulation pump will inevitably need to be adjusted in a large range to achieve the purpose of energy saving. At present, the turbulator is not suitable for large-scale regulation of the circulating slurry volume, and the feedback resistance of some projects is relatively large. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a cyclone flue gas purification tower plate. The cyclone flue gas purification tower plate adopts a conical cyclone structure composed of impeller blades, so that the flue gas and slurry produce a two-phase cyclone to achieve flue gas washing. The pollutant removal efficiency is much higher than that of the bubbling removal method of the circular hole tower plate and the removal efficiency is not lower than that of the turbulator, but the operating resistance is lower than that of the turbulator, and the production cost is also lower than that of the traditional turbulator, which has significant advantages.

[0006] A cyclone flue gas purification tower tray, characterized in that it comprises one or more cyclone monomers, the cyclone monomers are truncated cone structures that are larger at the top and smaller at the bottom, the middle of the cyclone monomers are hollow, the side walls of the cyclone monomers are composed of multiple impeller blades, the upper end surfaces of the side walls of the cyclone monomers are sealed by an upper sealing plate, the circular bottom surface of the truncated cone structure formed by the cyclone monomers is sealed by a lower sealing plate, and the upper and lower ends of the impeller blades are respectively positioned on the upper sealing plate and the lower sealing plate.

[0007] As a preferred embodiment of the above technical solution, the outer ring of the vortex monomer is provided with an annular guide tube, the annular guide tube is welded to the bottom surface of the upper sealing plate, and the inner diameter of the annular guide tube is not less than the outer diameter of the top surface of the vortex monomer frustum structure.

[0008] As a preferred embodiment of the above technical solution, both the upper sealing plate and the lower sealing plate are provided with slots for installing the impeller blades, and the slots are evenly spirally arranged along the circumference of the upper sealing plate.

[0009] As a preferred embodiment of the above technical solution, the inner ring and the outer ring of the swirl monomer are respectively welded with an inner reinforcement ring and an outer reinforcement ring.

[0010] As a preferred embodiment of the above technical solution, the deflection angle between the impeller blade and the central axis of the swirl unit is 30-60°, and the tangent angle between the lower end of the impeller blade and the lower sealing plate is 20-60°.

[0011] As a preferred embodiment of the above technical solution, one end of the slot located on the upper sealing plate is connected to the hollow portion of the swirl monomer, and the top surface of the impeller blade protrudes inwardly from the slot of the upper sealing plate.

[0012] As a preferred embodiment of the above technical solution, the bottom surface of the cyclone monomer is positioned by a support frame, and the support frame is used to install the cyclone flue gas purification tower plate in an absorption tower.

[0013] As a preferred embodiment of the above technical solution, the support frame is formed by welding a main beam and a secondary beam arranged in parallel.

[0014] As a preferred embodiment of the above technical solution, the swirl monomers are provided in multiple groups, and the multiple groups of swirl monomers are installed on the same upper sealing plate.

[0015] As a preferred embodiment of the above technical solution, the edge of the upper sealing plate is folded.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Compared with traditional round hole tower plates, the cyclone flue gas purification tower plates of the present invention utilize gas-liquid two-phase cyclone to achieve flue gas washing, and its pollutant removal efficiency is much higher than the bubbling removal method of round hole tower plates. At the same time, compared with traditional turbulators, the pollutant removal efficiency of the cyclone flue gas purification tower plates of the present invention is not lower than that of turbulators, but the operating resistance is lower than that of turbulators, and its production cost is also lower than that of traditional turbulators. It has obvious advantages and has broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2A top view of the upper sealing plate for positioning and installing 6 groups of swirl units.

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 It is a schematic diagram of the structure of an absorption tower using the cyclone flue gas purification tower plate.

[0022] The figures are marked as follows: 1-impeller blade, 2-upper sealing plate, 3-lower sealing plate, 4-annular guide tube, 5-slot, 6-inner reinforcement ring, 7-outer reinforcement ring, 8-main beam, 9-secondary beam, 10-cyclone flue gas purification tower plate, 11-spray layer, 12-flue gas inlet, 13-flue gas outlet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0025] like Figure 1 The cyclone flue gas purification tower plate comprises one or more cyclone monomers, wherein the cyclone monomer is a truncated cone structure that is larger at the top and smaller at the bottom. The middle of the cyclone monomer is hollow, and the side wall of the cyclone monomer is composed of multiple impeller blades 1. The upper end surface of the side wall of the cyclone monomer is sealed by an upper sealing plate 2, and the circular bottom surface of the truncated cone structure formed by the cyclone monomer is sealed by a lower sealing plate 3. The upper and lower ends of the impeller blade 1 are respectively positioned on the upper sealing plate 2 and the lower sealing plate 3.

[0026] Specifically, the number of impeller blades 1 is not fixed and can be determined according to the main beam spacing of the installation position in the wet absorption tower and the diameter of the absorption tower. In this embodiment, 18 to 24 impeller blades are preferably provided. Due to the provision of an upper sealing plate 2 and a lower sealing plate 3, during use, neither the flue gas nor the slurry can penetrate the upper sealing plate 2 and the lower sealing plate 3, and can only enter and exit from the gaps between adjacent impeller blades 1. When the flue gas enters the inner side of the impeller blade 1 from the bottom of the impeller blade 1, due to the guiding effect of the impeller blade 1, the flue gas has rotational kinetic energy. The rotating flue gas drives the slurry sprayed from above to rotate together, forming a fierce gas-liquid two-phase vortex, and the pollutants in the flue gas are removed by the washing of the slurry. In addition, since the impeller blade 1 is inclined downward toward the center, the slurry will be arranged on the entire impeller blade 1 due to the dual effects of centrifugal force and gravity during the vortex process, and will not gather at the center of the impeller blade 1 or the edge of the impeller blade 1 to cause a flue gas short circuit, thereby achieving a very high removal efficiency. At the same time, since the length of the impeller blade 1 is much greater than that of the plane impeller, the air flow channel is larger than that of the plane impeller, so its running resistance is much lower than that of the ordinary turbulator.

[0027] In this embodiment, the outer ring of the vortex monomer is provided with an annular guide tube 4, and the annular guide tube 4 is welded to the bottom surface of the upper sealing plate 2. The inner diameter of the annular guide tube 4 is not less than the outer diameter of the top surface of the vortex monomer truncated cone structure.

[0028] Specifically, the height of the annular guide tube 4 is preferably 5 to 20 cm, and is used for flue gas diversion, preventing flue gas short circuit, and strengthening the gas-liquid vortex flow inside the impeller blade 1. In situations where the desulfurization resistance requirement is low, the annular guide tube 4 can be eliminated.

[0029] In this embodiment, the upper sealing plate 2 and the lower sealing plate 3 are both provided with slots 5 for installing the impeller blades 1, and the slots 5 are evenly spirally arranged along the circumference of the upper sealing plate 2. Figure 2 , Figure 3 shown.

[0030] Specifically, the upper and lower ends of the impeller blade 1 are respectively inserted into the slots 5 of the upper sealing plate 2 and the lower sealing plate 3. For easy installation, the width of the slot 5 is about 1 mm wider than the thickness of the impeller blade 1. After insertion, the two ends of the impeller blade 1 are respectively welded to the upper sealing plate 2 and the lower sealing plate 3.

[0031] In this embodiment, the inner ring and the outer ring of the swirl unit are welded with an inner reinforcement ring 6 and an outer reinforcement ring 7 respectively.

[0032] Specifically, the inner reinforcement ring 6 and the outer reinforcement ring 7 are used to reinforce the impeller blade 1 to prevent the impeller blade 1 from deforming during use. When the material of the impeller blade 1 is thicker or the height of the impeller blade 1 is lower, one or both of the inner reinforcement ring 6 and the outer reinforcement ring 7 can be eliminated.

[0033] In this embodiment, the deflection angle between the impeller blade 1 and the central axis of the swirl unit is 30-60°, and the tangent angle between the lower end of the impeller blade 1 and the lower sealing plate 3 is 20-60°.

[0034] In this embodiment, one end of the slot 5 on the upper sealing plate 2 is communicated with the hollow portion of the cyclone unit, and the top surface of the impeller blade 1 protrudes inwardly from the slot 5 of the upper sealing plate 2 .

[0035] Specifically, the length of the slot 5 on the upper sealing plate 1 is 50-90% of the width of the upper end of the impeller blade 1, that is, only 50-90% of the upper end of the impeller blade 1 is welded to the upper sealing plate, and the length of the slot 5 on the lower sealing plate 3 is the same as the width of the lower end of the impeller blade 1.

[0036] In this embodiment, the bottom surface of the cyclone monomer is positioned by a support frame, and the support frame is used to install the cyclone flue gas purification tower tray in an absorption tower.

[0037] In this embodiment, the support frame is formed by welding a main beam 8 and a secondary beam 9 which are arranged in parallel.

[0038] Specifically, when the cyclone flue gas purification tower plate is installed in the absorption tower, the two ends of the main beam 9 are placed between the two beams of the absorption tower as the main force-bearing components. When the cyclone monomer is installed, the cyclone monomer is welded to the connection position of the main beam and the secondary beam, which is stable and reliable.

[0039] In this embodiment, the edge of the upper sealing plate 2 is folded.

[0040] Specifically, the folding width is 1 to 3 cm, which can reduce the thermal deformation of the upper sealing plate 2 when welding the impeller blade 1 .

[0041] In this embodiment, the cyclone monomers are provided in a plurality of groups, and the plurality of groups of cyclone monomers are installed on the same upper sealing plate 2 .

[0042] In this embodiment, a cyclone flue gas purification tray is formed by 6 groups of cyclone monomers, and the 6 groups of cyclone monomers are installed in a row below the upper sealing plate 2. Figure 1 , Figure 2 shown.

[0043] During installation, the cyclone flue gas purification tray 10 is arranged below the lowest layer of the spray layer 11 of the absorption tower, the flue gas inlet 12 of the absorption tower is arranged below the cyclone flue gas purification tray 10, and the flue gas outlet 13 is arranged above the spray layer 11. Figure 4As shown, the distance from the lowest spray layer 11 is ≥1.5 meters, the number of cyclone monomers in each cyclone flue gas purification tower plate 10 is determined according to the main beam spacing of the absorption tower of the arrangement layer and the diameter of the absorption tower, the upper cover plates 2 of each cyclone flue gas purification tower plate 10 are welded to each other, and the main beam 8 of the lower support frame of the impeller blade 1 is erected and welded to the main beam of the absorption tower of the arrangement layer. During use, the flue gas and slurry cannot penetrate the upper sealing plate 2 and the lower sealing plate 3, and can only enter and exit from the gap of the impeller blade 1 of the cyclone monomer. When the flue gas enters the inner side of the impeller blade 1 from the bottom of the impeller blade 1, due to the diversion effect of the impeller blade 1, the flue gas has rotational kinetic energy, and the rotating flue gas drives the slurry sprayed from above to rotate together, forming a fierce gas-liquid two-phase cyclone, and the pollutants in the flue gas are removed under the washing of the slurry. In addition, since the impeller blade 1 is inclined downward toward the center, the slurry will be arranged on the entire impeller blade 1 during the cyclone due to the dual effects of centrifugal force and gravity, and will not be gathered in the center of the impeller blade 1 or the edge of the impeller blade 1, causing the flue gas to short-circuit, so it can achieve a very high removal efficiency. At the same time, since the length of the impeller blade 1 is much larger than that of the plane impeller, the air flow channel is larger than that of the plane impeller, so its running resistance is much lower than that of the ordinary turbulator. Compared with traditional round hole tower plates, the cyclone flue gas purification tower plates of this embodiment utilize gas-liquid two-phase cyclone to achieve flue gas washing, and its pollutant removal efficiency is much higher than the bubbling removal method of round hole tower plates. At the same time, compared with traditional turbulators, the pollutant removal efficiency of the cyclone flue gas purification tower plates 10 of this embodiment is not lower than that of turbulators, but its operating resistance is lower than that of turbulators, and its production cost is also lower than that of traditional turbulators. It has obvious advantages and has broad prospects for promotion and application.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cyclonic flue gas purification tray, characterized in that: The utility model comprises one or more cyclone monomers, wherein the cyclone monomer is a truncated cone structure which is larger at the top and smaller at the bottom. The middle of the cyclone monomer is hollow, and the side wall of the cyclone monomer is composed of a plurality of impeller blades. The upper end surface of the side wall of the cyclone monomer is sealed by an upper sealing plate, and the circular bottom surface of the truncated cone structure formed by the cyclone monomer is sealed by a lower sealing plate. The upper and lower ends of the impeller blade are respectively positioned on the upper sealing plate and the lower sealing plate.

2. The cyclone flue gas purification tray according to claim 1, characterized in that: The outer ring of the cyclone monomer is provided with an annular guide tube, which is welded to the bottom surface of the upper sealing plate, and the inner diameter of the annular guide tube is not less than the outer diameter of the top surface of the cyclone monomer truncated cone structure.

3. The cyclone flue gas purification tray according to claim 1, characterized in that: The upper sealing plate and the lower sealing plate are both provided with slots for installing the impeller blades, and the slots are evenly spirally arranged along the circumference of the upper sealing plate.

4. The cyclone flue gas purification tray according to claim 1, characterized in that: The inner ring and the outer ring of the swirl monomer are respectively welded with an inner reinforcement ring and an outer reinforcement ring.

5. The cyclone flue gas purification tray according to claim 1, characterized in that: The deflection angle between the impeller blade and the central axis of the swirl unit is 30-60°, and the tangent angle between the lower end of the impeller blade and the lower sealing plate is 20-60°.

6. The cyclone flue gas purification tray according to claim 3, characterized in that: One end of the slot located on the upper sealing plate is communicated with the hollow portion of the cyclone monomer, and the top surface of the impeller blade protrudes inwardly from the slot of the upper sealing plate.

7. The cyclone flue gas purification tray according to claim 1, characterized in that: The bottom surface of the cyclone monomer is positioned by a support frame, and the support frame is used to install the cyclone flue gas purification tower tray in an absorption tower.

8. The cyclone flue gas purification tray according to claim 7, characterized in that: The support frame is formed by welding a main beam and a secondary beam arranged in parallel.

9. The cyclone flue gas purification tray according to claim 1, characterized in that: The swirl monomers are provided in a plurality of groups, and the plurality of groups of swirl monomers are mounted on the same upper sealing plate.

10. The cyclone flue gas purification tray according to claim 9, characterized in that: The edge of the upper sealing plate is folded.

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