A vortex grid dust removal and demisting device and absorption tower

Abstract

The present invention relates to a vortex grille dust removal and demisting device and an absorption tower, and relates to the field of dust removal and demisting devices. The vortex grille dust removal and demisting device comprises a shell, a flushing water pipe, a vortex grille and a vortex swirling device. The shell is cylindrical, one end of the shell has a smoke inlet, and the other end has a smoke outlet. The flushing water pipe is fixedly arranged in the shell and arranged along the direction from the smoke inlet to the smoke outlet. The vortex grille is spirally arranged around the flushing water pipe in the shell and has a plurality of radially extending slits. The vortex swirling device is fixed in the smoke inlet and used to generate a vortex airflow, and the spiral direction of the vortex airflow is opposite to that of the vortex grille. The vortex swirling device accelerates convergence and centrifugal dust removal. The spiral direction of the vortex grille is opposite to that of the vortex airflow, which greatly increases the probability of collision between the dust-containing smoke and the vortex grille, and achieves deep purification of the smoke. The flushing water ensures long-term operation of the equipment.

Description

Technical Field

[0001] The invention relates to a dust removal and demisting device, in particular to a vortex grid dust removal and demisting device and an absorption tower, and can be used in the process of removing carbon dioxide from alcohol amines for deep purification of tail gas from a decarbonization absorption tower. Background Art

[0002] As the global attention to the "greenhouse effect" issue increases, the market for "carbon reduction" technology in my country is also growing, injecting new impetus into China's green development. In order to achieve its carbon reduction goals, it is necessary for China to take new actions. In order to achieve the "carbon neutrality" strategy, my country's energy, industry, consumption and regional structures will undergo major adjustments in the next 40 years. With the strengthening of carbon reduction and environmental protection efforts, it is a feasible option at this stage for key carbon emission industries in traditional industries to carry out technological upgrades and emission reduction controls. The development and promotion of carbon reduction control technologies for high-quality production capacity in thermal power, steel, chemicals, building materials, nonferrous metals, papermaking and other industries can be the focus of recent carbon reduction technology research and development. Before the non-fossil energy system is fully established, CO 2 Carbon capture and storage (CCS) has the potential to reduce costs and increase flexibility in achieving greenhouse gas emissions reductions.

[0003] In many combustion flue gas CO 2 Among the capture technologies, the carbon capture process using alcohol amine as absorbent is the most mature and most widely used technology in industry. In the typical amine liquid chemical absorption carbon capture process, the flue gas after pretreatment such as dust removal, desulfurization and preliminary cooling enters the absorption tower and reacts with the absorbent-poor CO2 sprayed from the top of the tower. 2 The solution (referred to as lean solution) reacts in reverse, and the flue gas after decarbonization is discharged from the upper part of the absorption tower.

[0004] CO 2 Chemical absorption technology is the CO2 capture technology with the greatest industrial application potential due to its high capture efficiency, relatively mature technology and good adaptability. 2 However, chemical absorption systems use amine-based absorbents to capture CO in flue gas. 2 At the same time, the amine-based absorbent and its degradation products are discharged into the atmosphere in the form of gas and aerosol along with the flue gas, which will cause secondary environmental pollution. 2 Chemical absorption system is the main form of emission of pollutants such as organic amines. In addition, the presence of different types of condensation nuclei such as smoke and sulfuric acid aerosol in the inlet flue gas will cause a significant increase in the emission of 2-methyl-6-ethylaniline in the form of aerosol, among which SO in the flue gas 3 When it comes into contact with water vapor, it will generate high concentration sulfuric acid aerosol.

[0005] Research on post-processing equipment for the most promising alcohol amine decarbonization technology, studying amines and absorbents and degradation products, organic aerosol escape, and particulate matter escape will help promote the steady progress of this technology in China's "carbon reduction" trend.

[0006] In the existing dust removal and demisting equipment, the contact between the flue gas and the flushing water is insufficient, the dust removal and demisting efficiency is low, and there is a problem of insufficient dust removal and demisting, making it difficult to achieve deep purification of the flue gas. Some absorption towers need to be equipped with multi-stage dust removal and demisting equipment to meet the pollution-free emission standards. The equipment construction cost is high and the multi-stage equipment is difficult to repair and maintain. Summary of the invention

[0007] The technical problem to be solved by the present invention is how to achieve efficient dust and mist removal of flue gas.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A vortex grille dust and mist removal device comprises a shell, a flushing water pipe, a vortex grille and a vortex swirling device, the shell being cylindrical, having a smoke inlet at one end and a smoke outlet at the other end, the flushing water pipe being fixedly arranged in the shell and arranged along the direction from the smoke inlet to the smoke outlet, the vortex grille being spirally arranged around the flushing water pipe in the shell and having a plurality of radially extending slits, the vortex swirling device being fixed in the smoke inlet and used to generate a vortex airflow, the spiral direction of the vortex airflow being opposite to the spiral direction of the vortex grille.

[0009] The beneficial effects of the present invention are as follows: 1. The vortex swirl device accelerates centrifugal dust removal. Flue gas containing particulate matter and aerosols undergoes vortex acceleration to form a vortex airflow. Fine particulate matter, aerosols, and droplets produce intense acceleration collisions during the centrifugal acceleration process, which is conducive to the aggregation of small droplets into large droplets. Particles and aerosols are captured by droplets after breaking through the surface tension of the droplets. After centrifugal acceleration, the dust-containing flue gas will perform a spiral upward motion adhering to the wall. In the process, the larger dust-containing droplets that are gathered are directly captured by the inner wall of the shell.

[0010] 2. Tangential interception of the vortex grille. The spiral direction of the vortex grille is opposite to that of the vortex airflow. This design greatly increases the probability of collision between the dust-laden flue gas and the vortex grille. The particulate matter-laden flue gas collides with the vortex grille many times and repeatedly during the spiral rise. In the process, tiny droplets, aerosols and other pollutants can be repeatedly gathered and intercepted. The droplets gather in the slits of the vortex grille. As the number of droplets increases, the liquid film in the vortex grille becomes thicker and thicker. Under the combined action of gravity and the centrifugal force of the cyclone, it gathers to the connection between the vortex grille and the inside of the shell, and finally falls down along the shell and is discharged. It has a simple structure and high dust and mist removal efficiency, which can achieve deep purification of the flue gas.

[0011] 3. Internal flushing for stable operation. The flushing water pipe is used to spray flushing water on the vortex grille. The internal flushing water is designed to flush the vortex grille without dead corners to prevent scaling. The spilled flushing water can also flush the vortex whirling device. Intermittent and sufficient flushing can ensure long-term stable operation of the equipment.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the vortex grille includes a plurality of grille rods spirally arranged around the flushing water pipe, one end of each of the grille rods is fixedly connected to the flushing water pipe or the inner wall of the shell, and the slit is formed between two adjacent grille rods.

[0014] The beneficial effects of adopting the above further solution are: the width of the slit can be adjusted during the installation process, and if the grille rod is damaged, the damaged grille rod can be replaced separately without replacing the vortex grille as a whole, and the maintenance cost is low.

[0015] Furthermore, the flushing water pipe includes a flushing main pipe and a flushing nozzle. There are multiple flushing nozzles. The multiple flushing nozzles are fixed to the side wall of the flushing main pipe and connected to the interior of the flushing main pipe, and are evenly distributed along the axis of the flushing main pipe.

[0016] The beneficial effect of adopting the above further scheme is that the flushing water enters the flushing main pipe and is sprayed out from the flushing nozzle, and the flushing water is evenly sprayed on the vortex grille to prevent scaling and ensure the long-term operation of the vortex grille.

[0017] Furthermore, the plurality of flushing nozzles are spirally distributed along the flushing main pipe.

[0018] The beneficial effects of adopting the above further solution are: uniform arrangement, and the flushing water can be sprayed evenly in both the circumferential direction and the axial direction.

[0019] Furthermore, the flushing water pipe also includes a flushing water joint fixed to one end of the flushing main pipe.

[0020] The beneficial effect of adopting the above further solution is that it is easy to connect with the water pipe through the flushing water joint.

[0021] Furthermore, there are at least two vortex grilles, and at least two of the vortex grilles are evenly distributed in the circumferential direction of the flushing water pipe.

[0022] The beneficial effects of adopting the above further solution are: the contact area between the vortex grille and the flue gas is large, and the dust removal and mist removal efficiency is high.

[0023] Furthermore, there are three vortex grilles.

[0024] Furthermore, the shell is cylindrical, and the flushing water pipe is arranged along the axis of the shell.

[0025] The beneficial effect of adopting the above further solution is that when multiple vortex grid dust removal and demisting devices are applied to the absorption tower, multiple devices are arranged close to each other, and the space utilization rate is high.

[0026] Furthermore, the vortex spinning device is a vortex generator or a spinning impeller.

[0027] The beneficial effect of adopting the above further solution is that the vortex generator or vortex impeller can generate vortex airflow, the vortex impeller structure is simpler, and the equipment cost is low.

[0028] The present invention also provides an absorption tower, comprising the vortex grid dust and mist removal device.

[0029] The beneficial effects of adopting the above scheme are: high dust removal and mist removal efficiency, which can achieve deep purification of flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the vortex grille dust removal and demisting device of the present invention;

[0031] Figure 2 A three-dimensional perspective view of the vortex grid dust removal and demisting device of the present invention;

[0032] Figure 3 This is a schematic diagram of the arrangement of the vortex grid dust removal and demisting device of the present invention in an absorption tower from a top view.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Shell, 2. Flushing water pipe, 3. Smoke inlet, 4. Smoke outlet, 5. Vortex grille, 6. Rotating impeller, 7. Flushing main pipe, 8. Flushing nozzle, 9. Flushing water joint, 10. Grille rod. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] like Figure 1 and Figure 2As shown, the present invention provides a vortex grille dust removal and demisting device, comprising a shell 1, a flushing water pipe 2, a vortex grille 5 and a vortex swirling device, the shell 1 is cylindrical, one end of the shell 1 has a smoke inlet 3, and the other end has a smoke outlet 4, the flushing water pipe 2 is fixedly arranged in the shell 1 and arranged along the direction from the smoke inlet 3 to the smoke outlet 4, the vortex grille 5 is spirally arranged around the flushing water pipe 2 in the shell 1, and has a plurality of radially extending slits, the vortex swirling device is fixed in the smoke inlet 3 and is used to generate a vortex airflow, and the spiral direction of the vortex airflow is opposite to the spiral direction of the vortex grille 5.

[0037] The beneficial effects of the vortex grid dust removal and demisting device are: 1. The vortex swirl device accelerates centrifugal dust removal. Flue gas containing particulate matter and aerosols undergoes vortex acceleration to form a vortex airflow. Fine particles, aerosols, and droplets produce intense acceleration collisions during the centrifugal acceleration process, which is conducive to the aggregation of small droplets into large droplets. Particles and aerosols are captured by droplets after breaking through the surface tension of the droplets. After centrifugal acceleration, the dust-containing flue gas will do a spiral upward motion adhering to the wall. In the process, the larger dust-containing droplets that converge are directly captured by the inner wall of the shell.

[0038] 2. Tangential interception of the vortex grille 5. The spiral direction of the vortex grille 5 is opposite to that of the vortex airflow. This design greatly increases the probability of collision between the dust-laden flue gas and the vortex grille 5. The particulate matter-laden flue gas collides with the vortex grille 5 many times and repeatedly during the spiral rise. In the process, tiny droplets, aerosols and other pollutants can be repeatedly gathered and intercepted. The droplets gather in the slits of the vortex grille 5. As the number of droplets increases, the liquid film in the vortex grille 5 becomes thicker and thicker. Under the combined action of gravity and the centrifugal force of the cyclone, it gathers to the connection between the vortex grille 5 and the inside of the shell 1, and finally falls down along the shell 1 and is discharged. The structure is simple, the dust removal and mist removal efficiency is high, and deep purification of the flue gas can be achieved.

[0039] 3. Internal flushing for stable operation. The flushing water pipe 2 is used to spray flushing water to the vortex grille 5. The internal flushing water is designed to flush the vortex grille 5 without dead corners to prevent scaling. The spilled flushing water can also flush the vortex spinning device. Intermittent and sufficient flushing can ensure long-term stable operation of the device.

[0040] Among them, this embodiment does not limit the cross-sectional shape of the cylindrical shell 1 and the placement method in the use state. The cross-sectional shape of the shell 1 can be a polygon, such as a triangle, a rectangle, etc., or the cross-sectional shape can be a circle. It is preferred to use a shell 1 with a circular cross-sectional shape, that is, the shell 1 is preferably cylindrical. The shell 1 can be set vertically when in use, and the technical effect of the present invention can be achieved with the smoke inlet 3 facing upward or downward. The shell 1 can also be tilted or horizontally set. Since the movement state of the smoke in the natural state and in the absorption tower is from bottom to top, preferably, the shell 1 is set vertically, and the smoke inlet 3 is downward, and the smoke outlet 4 is set upward, without adding other fans to promote the flow of gas.

[0041] The flushing water pipe 2 is fixedly arranged in the shell 1 through a water pipe bracket, and the water pipe bracket is fixedly connected to the flushing water pipe 2 and the shell 1 respectively, or the water pipe bracket is fixedly connected to the flushing water pipe 2 and the side wall of the absorption tower respectively.

[0042] Based on the above scheme, the vortex grille 5 includes a plurality of grille rods 10 spirally arranged around the flushing water pipe 2, one end of each of the grille rods 10 is fixedly connected to the flushing water pipe 2 or the inner wall of the shell 1, and the slit is formed between two adjacent grille rods 10.

[0043] The width of the slit can be adjusted during the installation process, and if the grille rod 10 is damaged, the damaged grille rod 10 can be replaced alone without replacing the vortex grille 5 as a whole, which reduces the maintenance cost.

[0044] In one specific embodiment, one end of all the grid rods 10 away from the flushing water pipe 2 is fixed to the housing 1 .

[0045] Based on any of the above schemes, the flushing water pipe 2 includes a flushing main pipe 7 and a flushing nozzle 8. The flushing nozzles 8 are multiple, and the multiple flushing nozzles 8 are fixed to the side wall of the flushing main pipe 7 and connected to the interior of the flushing main pipe 7, and are evenly distributed along the axis of the flushing main pipe 7.

[0046] The grid rod 10 is spirally arranged around the flushing main pipe 7. Flushing water enters the flushing main pipe and is sprayed out from the flushing nozzle. The flushing water is evenly sprayed on the vortex grid to prevent scaling and ensure the long-term operation of the vortex grid.

[0047] Based on any of the above solutions, the plurality of flushing nozzles 8 are spirally distributed along the flushing main pipe 7 .

[0048] Evenly arranged, the flushing water can be sprayed evenly in both the circumferential and axial directions.

[0049] Based on any of the above solutions, the flushing water pipe 2 also includes a flushing water connector 9 fixed to one end of the flushing main pipe 7.

[0050] The flushing water connector 9 is used to be connected to the flushing water inlet pipe.

[0051] Preferably, the flushing water connector 9 is located outside the housing 1 .

[0052] On the basis of any of the above solutions, there are at least two vortex grilles 5 , and the at least two vortex grilles 5 are evenly distributed in the circumferential direction of the flushing water pipe 2 .

[0053] The contact area between the vortex grille and the flue gas is large, and the dust and mist removal efficiency is high.

[0054] Preferably, there are three vortex grilles 5. In a cross section perpendicular to the flushing main pipe 7, two adjacent vortex grilles 5 are spaced 120° apart.

[0055] On the basis of any of the above solutions, the shell 1 is cylindrical, and the flushing water pipe 2 is arranged along the axis of the shell 1.

[0056] The flushing water pipe 2 is coaxially arranged with the shell 1, and the cross section of the shell 1 is circular. When a plurality of vortex grid dust removal and demisting devices are applied to the absorption tower, a plurality of them are arranged close to each other, and the space utilization rate is high.

[0057] Based on any of the above solutions, the vortex spinning device is a vortex generator or a spinning impeller 6.

[0058] The vortexer or vortex impeller can generate vortex airflow. The vortex impeller has a simpler structure and low equipment cost.

[0059] In one of the specific embodiments, a vortex grille dust removal and demisting device, the shell 1 is in the shape of a circular tube, the lower end is a smoke inlet 3, and the upper end is a smoke outlet 4. The vortex impeller 6 is horizontally fixed inside the shell 1, and its lower edge is flush with the lower edge of the shell 1, and the circumference is welded and fixed to the inner wall of the shell 1. Each vortex grille 5 is composed of a group of grille rods 10 of equal length, and each grille rod 10 is perpendicular to the inner wall of the shell 1. Each group of grille rods 10 is spirally and evenly arranged on the spiral line of the inner wall of the shell 1. There are three vortex grilles 5, and the three groups of grille rods 10 on the same cross section are spaced 120° apart, together forming a vortex grille 5. The flushing nozzle 8 is installed on the flushing main pipe 7, and is spirally and evenly arranged along the axis of the flushing main pipe 7, so that the flushing water can evenly cover the entire vortex grille 5. A flushing water connector 9 is provided under the flushing main pipe 7 to connect the flushing water.

[0060] The present invention also provides an absorption tower, comprising the vortex grid dust and mist removal device.

[0061] The dust and mist removal efficiency is high, which can achieve deep purification of flue gas. Figure 3As shown, the vortex grid dust removal and demisting device is arranged in the tower body of the absorption tower and is located above the packing layer. Multiple vortex grid dust removal and demisting devices are closely arranged to form a vortex grid dust removal and demisting layer. The vortex grid dust removal and demisting device of the present invention is suitable for any gas absorption tower, especially can be used in alcohol amine removal of carbon dioxide absorption tower, can achieve deep purification.

[0062] In one of the specific embodiments, an absorption tower, a vortex grid dust removal and demisting device is installed above the packing layer of the alcohol amine carbon dioxide removal absorption tower, and a vortex grid dust removal and demisting layer is composed of a plurality of vortex grid dust removal and demisting devices with a shell diameter of 500mm (other sizes can be selected in other embodiments). The flue gas after decarbonization carries the escaped alcohol amine droplets and aerosols together and enters the shell 1 from bottom to top. When the mixed flue gas passes through the rotating impeller 6, it is accelerated clockwise and centrifugal. During the process, the particles and the droplets collide violently, and the small droplets aggregate into large droplets. The particles and aerosols break through the surface tension of the liquid film and enter the droplets. The mixed gas moving against the inner wall of the shell 1 collides with the three groups of vortex grids 5 arranged in a counterclockwise rotation during the rising process. During the collision, the large droplets and the droplets containing particulate matter are intercepted by the grid rods 10 and converge in the gap between the two adjacent grid rods 10. As the number of droplets increases, the liquid film in the vortex grille 5 becomes thicker and thicker. Under the combined effect of gravity and the centrifugal force of the cyclone, the liquid film gathers toward the connection between the grille rod 10 and the inside of the shell 1, and finally flows back into the absorption tower along the inner wall of the shell 1. The flushing water pipe 2 is installed in the center of the shell 1, runs through the entire shell 1, and is fixed on the vortex impeller 6. The water coming through the flushing water joint 9 is sprayed on the vortex grille 5 at a large angle by the evenly arranged flushing nozzles 8. The internal flushing design can prevent the accumulation and scaling of particles in the gap between the grille rods 10, and ensure the long-term stable operation of the equipment.

[0063] The vortex airflow in the opposite spiral direction of the vortex grille 5 is generated by the rotating impeller 6. During operation, the pollutants in the flue gas undergo three processes: accelerated convergence, centrifugal removal, and collision interception. At the same time, the spirally arranged vortex grille can also intercept the vortex airflow multiple times. By flushing the inside of the flushing water pipe 2 without dead angles, the high utilization rate of the equipment can be guaranteed.

[0064] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vortex grid dust removal and demisting device, characterized in that: The invention comprises a shell (1), a flushing water pipe (2), a vortex grille (5) and a vortex swirling device, wherein the shell (1) is cylindrical, one end of the shell (1) has a smoke inlet (3), and the other end has a smoke outlet (4), the flushing water pipe (2) is fixedly arranged in the shell (1) and arranged in a direction from the smoke inlet (3) to the smoke outlet (4), the vortex grille (5) is spirally arranged around the flushing water pipe (2) in the shell (1) and has a plurality of radially extending slits, the vortex swirling device is fixed in the smoke inlet (3) and is used to generate a vortex airflow, the spiral direction of the vortex airflow is consistent with the spiral direction of the vortex grille (5), and the vortex swirling device is fixed in the smoke inlet (3) and is used to generate a vortex airflow. The vortex swirling device is a swirler or a swirling impeller (6), and the vortex swirling device is coaxially arranged with the flushing water pipe (2); the vortex grille (5) comprises a plurality of grille rods (10) spirally arranged around the flushing water pipe (2), one end of each of the grille rods (10) is fixedly connected to the inner wall of the flushing water pipe (2) or the shell (1), and the slit is formed between two adjacent grille rods (10); the droplets gather in the slit to form a liquid film, and the liquid film gathers toward the connection between the vortex grille (5) and the inside of the shell (1) under the combined action of gravity and the centrifugal force of the cyclone, and finally falls and is discharged along the shell (1).

2. A vortex grid dust removal and demisting device according to claim 1, characterized in that: The flushing water pipe (2) comprises a flushing main pipe (7) and a flushing nozzle (8), wherein the flushing nozzle (8) is multiple, and the multiple flushing nozzles (8) are fixed to the side wall of the flushing main pipe (7) and communicate with the interior of the flushing main pipe (7), and are evenly distributed along the axis of the flushing main pipe (7).

3. A vortex grid dust removal and demisting device according to claim 2, characterized in that: The plurality of flushing nozzles (8) are distributed spirally along the flushing main pipe (7).

4. A vortex grid dust removal and demisting device according to claim 2, characterized in that: The flushing water pipe (2) also includes a flushing water connector (9) fixed to one end of the flushing main pipe (7).

5. A vortex grid dust and mist removal device according to any one of claims 1 to 4, characterized in that: There are at least two vortex grilles (5), and the at least two vortex grilles (5) are evenly distributed in the circumferential direction of the flushing water pipe (2).

6. A vortex grid dust removal and demisting device according to claim 5, characterized in that: There are three vortex grilles (5).

7. A vortex grid dust and mist removal device according to any one of claims 1 to 4, characterized in that: The shell (1) is cylindrical, and the flushing water pipe (2) is arranged along the axis of the shell (1).

8. An absorption tower, characterized in that: It comprises the vortex grille dust removal and demisting device as described in any one of claims 1-7.

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