Water washing dust removal tower and method for operating water washing dust removal tower

Abstract

The invention relates to a washing dust removal tower which comprises a tower body, a gas inlet located in the bottom of the tower body and a gas outlet located in the top of the tower body. A water storage layer, a first-stage spraying layer, a filler washing layer and a filler demisting layer are sequentially arranged in the tower body from bottom to top, and the tower is characterized in that a first-stage spraying pipe for spraying from top to bottom is arranged in the first-stage spraying layer and is communicated with the water storage layer through a circulating pipeline; the primary shower layer is shaped such that the primary shower layer has an increased cross-sectional area and a reduced height without changing the volume compared to the original primary shower layer. The height of the equipment structure is reduced, so that the washing dust removal tower can be used in a part of space-limited areas while the dust removal efficiency is ensured.

Description

Technical Field

[0001] The present disclosure relates to equipment for dust treatment processes, and in particular to a water-washing dust removal tower and a method for operating the water-washing dust removal tower. Background Art

[0002] The water-washing dust removal device is a device that uses water or other liquids to contact dust-laden gas and remove dust particles and gaseous pollutants through physical and chemical effects. The working principle of the water-washing dust removal device is to introduce dust-laden gas into the device, and the fine water mist generated by the spray system contacts the gas, so that the dust particles are adsorbed by the water mist and settle. This process can effectively remove liquid or solid particles with a diameter of 0.1-20 microns from the airflow, and remove some gaseous pollutants at the same time.

[0003] During the construction and operation of cigarette factories, it is necessary to strictly comply with environmental protection laws and standards, including the treatment of waste gas emissions. Therefore, water-washing dust removal technology, as an effective waste gas treatment method, is widely used in cigarette factories to reduce the emission of atmospheric pollutants. Through the application of water-washing dust removal technology, the content of harmful substances in the waste gas, such as the mass concentration of ammonia escape and the mass concentration of droplets, can be reduced to meet the design specification requirements, thus greatly improving the degree of flue gas tailing.

[0004] Vertical water-washing dust removal towers are commonly used in cigarette factories. Vertical water-washing dust removal towers can introduce exhaust gas into the tower through air ducts. When the exhaust gas passes through the packing layer, it can come into contact with the aqueous solution (usually an alkaline solution such as sodium hydroxide), so that the pollutants are adsorbed or dissolved in the water. The treated liquid waste can be discharged through the bottom sewage system, and the treated exhaust gas can be discharged into the atmosphere through the exhaust pipe, thereby achieving the purpose of purification.

[0005] However, the overall height of a conventional vertical water-washing dust removal tower is usually more than six meters. Therefore, the daily maintenance or packing cleaning of this vertical water-washing dust removal tower is relatively cumbersome. In addition, the spraying head of this vertical water-washing dust removal tower is high, the water pump selection power is large, and the energy consumption is high.

[0006] In addition, in areas prone to typhoons, the height of the vertical water-washing dust removal tower used in such areas is limited because the vertical water-washing dust removal tower may be damaged by factors such as weather. In particular, for cigarette factories, since the vertical water-washing dust removal tower is usually installed on the roof of the factory building, it is more susceptible to typhoons and other weather, so its height should be more limited. Summary of the invention

[0007] In order to solve the shortcomings existing in the prior art, the present disclosure provides a water-washing dust removal tower, which can have a lower structural height while ensuring the dust removal efficiency.

[0008] According to the present disclosure, a water-washing dust removal tower is proposed, comprising a tower body, an air inlet located at the bottom of the tower body and an air outlet located at the top of the tower body; a water storage layer, a primary spray layer, a filler washing layer and a filler demisting layer are sequentially arranged inside the tower body from bottom to top, and is characterized in that a primary spray pipe for spraying from top to bottom is arranged in the primary spray layer, and the primary spray pipe is connected to the water storage layer through a circulation pipeline; the primary spray layer is shaped so that the primary spray layer has an increased cross-sectional area and a decreased height compared with the original primary spray layer under the condition of unchanged volume.

[0009] Therefore, compared with the original primary spray layer or the original water-washing dust removal tower, the water-washing dust removal tower according to the present disclosure reduces the height of the equipment structure by increasing the cross-sectional area, so that the water-washing dust removal tower according to the present disclosure can be used in some areas with limited space while ensuring the dust removal efficiency. Moreover, since the structural height of the entire water-washing dust removal tower is reduced, not only can the water-washing spray height of the equipment be reduced, the water pump head can be adjusted to reduce energy consumption, but it can also be convenient for maintenance.

[0010] In other words, the water-washing dust-removing tower according to the present invention realizes a flattened vertical water-washing dust-removing tower, for example, making it have a height comparable to that of a conventional horizontal water-washing dust-removing tower, which not only reduces the height of the equipment and avoids the influence of limited space in some areas, but also greatly reduces the empty tower flow rate, reduces water vapor escape, adjusts the spraying height, reduces the water pump head, and reduces energy consumption losses.

[0011] In some embodiments, when the volume remains unchanged, the height of the primary spray layer is equal to or less than half of the height of the original primary spray layer, thereby significantly reducing the structural height of the entire water-washing dust removal tower.

[0012] In some embodiments, a secondary spray layer is provided between the packing washing layer and the packing demisting layer, and a secondary spray pipe for spraying from top to bottom is provided in the secondary spray layer, and the secondary spray pipe is also connected to the water storage layer through a circulation pipeline. Thus, a two-stage vertical water-washing dust removal tower can be realized, thereby increasing the dust removal capacity of the water-washing dust removal tower.

[0013] In some embodiments, the secondary spray layer is formed so that the secondary spray layer has an increased cross-sectional area and a reduced height compared to the original secondary spray layer while the volume remains unchanged. In this regard, in some embodiments, while the volume remains unchanged, the height of the secondary spray layer is equal to or less than half the height of the original secondary spray layer. Thus, the height of the equipment can be reduced while ensuring the dust removal efficiency, so that the water-wash dust removal tower can be used in situations where the height of the equipment is limited.

[0014] In some embodiments, the cross-sectional area of ​​the entire water-washing dust removal tower increases with the cross-sectional area of ​​the primary spray layer, so that the cross-sectional area of ​​the water-washing dust removal tower is equal to the cross-sectional area of ​​the primary spray layer. Thus, a flattened primary spray layer can be easily realized.

[0015] In some embodiments, a packing support plate is provided at the bottom of the packing washing layer, the packing is placed on the support plate in a random pile, and a packing pressure plate is provided above the packing, thereby preventing the packing from being blown away by the rising airflow.

[0016] In some embodiments, the gas outlet is located on the top of the tower body above the filler demisting layer, and a gas outlet hood is provided on the gas outlet, which is beneficial to the discharge of gas and achieves buffering of the air flow.

[0017] In some embodiments, a filtering device is provided in the water storage layer, thereby filtering solid waste in the water.

[0018] In some embodiments, a first discharge port is provided on the packing washing layer and / or a second discharge port is provided on the packing demisting layer, thereby enabling packing replacement.

[0019] In some embodiments, a first inspection hole is provided on the primary spray layer, thereby enabling inspection and maintenance of the water-washing dust removal tower.

[0020] In some embodiments, a second inspection hole is provided on the secondary spray layer, thereby enabling inspection and maintenance of the water-washing dust removal tower.

[0021] In some embodiments, the gas outlet is located on the extension connected to the filler demisting layer and faces vertically downward, and a U-shaped chimney can be connected to the vertically downward gas outlet, so that the exhausted gas can flow downward first and then upward, which can facilitate further gas-liquid separation.

[0022] In addition, the present disclosure also provides a method for operating the water-washing dust removal tower according to the present disclosure as described above, characterized in that the method includes the following steps: after the gas to be dusted enters the first-level spray layer through the air inlet, the first-level spray pipe draws spray liquid from the water storage layer through the circulation system to spray and wash the gas to be dusted; after gas-liquid separation through the packing demisting layer, the gas purified by the first-level spray layer flows to the gas outlet and is discharged from the gas outlet, and the waste liquid flows to the water storage layer after fully contacting with the packing washing layer and is regularly discharged from the water storage layer.

[0023] In some embodiments, if a secondary spray layer is provided between the packing washing layer and the packing demisting layer, and a secondary spray pipe for spraying from top to bottom is provided in the secondary spray layer, and the secondary spray pipe is also connected to the water storage layer through a circulation pipeline, then the gas to be dusted is purified by the primary spray layer and then purified by the secondary spray layer, and the secondary spray pipe also draws spray liquid from the water storage layer through the circulation system to spray and wash the gas to be dusted, and the gas purified by the secondary spray layer flows to the gas outlet and is discharged from the gas outlet.

[0024] The method according to the present disclosure can bring the same advantages as those described about the water-wash dust removal tower according to the present disclosure, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. The accompanying drawings are only used for the purpose of illustrating preferred embodiments and are not considered to be limitations of the present disclosure. Moreover, in all the drawings, the same reference numerals are used to represent the same components. Some drawings may not be shown to scale and may even be exaggerated, and are only used for illustrative purposes. In the drawings:

[0026] Figure 1 It is a partially cutaway schematic front view of a water-washing dust removal tower according to an embodiment of the present application;

[0027] Figure 2 for Figure 1 Schematic side view of a water-wash dust removal tower. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application 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 on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] As mentioned above, the overall height of a conventional vertical water-washing dust removal tower is usually more than six meters. Therefore, the daily maintenance or packing cleaning of such a vertical water-washing dust removal tower is cumbersome, and the spraying head of such a vertical water-washing dust removal tower is high, the water pump selection power is large, and the energy consumption is high. In addition, especially for cigarette factories, since the vertical water-washing dust removal tower is usually installed on the roof of the factory building, it is easily affected by typhoons and other weather, so its height should be limited.

[0037] Therefore, in view of the fact that the existing water-washing dust removal equipment is limited in height, the concept of the present invention is to reduce the structural height of the equipment, while optimizing the design to ensure that the dust removal efficiency is met and reduce energy consumption.

[0038] For the convenience of explanation, a water-washing dust removal tower according to an embodiment of the present disclosure is taken as an example for explanation below.

[0039] Reference Figure 1 and Figure 2 , which respectively show a schematic front view and a side view of an embodiment of a water-washing dust removal tower according to the present disclosure.

[0040] The water-washing dust removal tower according to the embodiment of the present disclosure can be used in a situation where the height is limited, and can be particularly applied to cigarette factories.

[0041] Especially referring to Figure 1 According to an embodiment of the present disclosure, a water-washing dust removal tower may include a tower body 100, an air inlet 110 located at the bottom of the tower body 100, and an air outlet 120 located at the top of the tower body 100. The air inlet 110 located at the bottom of the tower body 100 can be used to allow dust-containing gas, that is, unpurified gas, to enter the water-washing dust removal tower, and the air outlet 120 located at the top of the tower body 100 can be used to discharge purified gas from the water-washing dust removal tower, so that the gas flows upward from the bottom of the tower.

[0042] Inside the tower body 100, a water storage layer 200, a primary spray layer 300, a packing washing layer 400 and a packing demisting layer 500 may be sequentially arranged from bottom to top. The water storage layer 200 may be configured to provide spray liquid. The primary spray layer 300 may be configured to spray the spray liquid to the unpurified gas. The packing washing layer 400 may be configured to expand the contact area between the unpurified gas and the circulating spray liquid and to make the unpurified gas and the liquid uniformly and fully contact. The packing demisting layer 500 may be configured to separate gas and liquid and may also be configured to intercept dust, particulate matter and / or floccules in the gas.

[0043] A primary spray pipe 310 for spraying from top to bottom may be provided in the primary spray layer 300. The water storage layer 200 may be connected to the primary spray pipe 310 of the primary spray layer 300 through a circulation pipeline (not shown) of a circulation system. In addition, the spray liquid may circulate through a circulation pump (not shown) of the circulation system. Therefore, the spray liquid may be sprayed downward from the upper part of the tower body, so that the spray liquid may be in reverse contact with the gas moving upward from the bottom of the tower.

[0044] An atomizing nozzle may be installed on the primary spray pipe 310, through which the spray liquid may be atomized, thereby increasing the contact area between the gas to be dusted and the spray liquid, so as to achieve a better dust removal effect.

[0045] According to the present disclosure, the primary spray layer 300 may be formed such that, compared with the original or conventional primary spray layer, i.e., the primary spray layer of the prior art that is not improved according to the present disclosure, the primary spray layer 300 has an increased cross-sectional area and a reduced height while the volume remains unchanged. In other words, the primary spray layer 300 may have the same volume as the original or conventional primary spray layer, but has a smaller height than the original or conventional primary spray layer and a larger cross-sectional area than the original or conventional primary spray layer. Therefore, the primary spray layer 300 is flattened, and the structural height of the entire water-washing dust removal tower decreases as the height of the primary spray layer decreases.

[0046] Since the volume of the entire primary spray layer 300 remains unchanged although the height of the primary spray layer 300 is reduced, therefore, although the height of the primary spray layer 300 is reduced and thus the structural height of the entire water-washing dust removal tower is reduced, under the condition that the entry speed of the gas to be dusted into the primary spray layer 300 remains unchanged, the contact area between the gas to be dusted and the spray liquid can remain unchanged, so that the dust removal efficiency of the water-washing dust removal tower can remain unchanged. Therefore, according to the present disclosure, by increasing the cross-sectional area and reducing the overall equipment height, the equipment height can be reduced while ensuring the dust removal efficiency, so that the water-washing dust removal tower can be used in a situation where, for example, the equipment height is limited.

[0047] It should be noted here that the term “original or conventional” refers to the structure before being improved according to the concept of the present disclosure.

[0048] Advantageously, the height of the primary spray layer 300 can be equal to or less than half the height of the original or conventional primary spray layer while maintaining the same volume, thereby significantly reducing the structural height of the entire water-washing dust removal tower.

[0049] According to some embodiments of the present disclosure, in particular, referring to Figure 1A secondary spray layer 600 may be provided between the packing washing layer 400 and the packing demisting layer 500. A secondary spray pipe 610 for spraying from top to bottom may be provided in the secondary spray layer 600, and the secondary spray pipe 610 may also be connected to the water storage layer 200 through a circulation pipeline. Thus, a two-stage vertical water-washing dust removal tower can be realized, thereby increasing the dust removal capacity of the water-washing dust removal tower.

[0050] Similar to the primary spray pipe 310, in the secondary spray pipe 610, the spray liquid can also be sprayed downward from the upper part of the tower body, so that the spray liquid can reversely contact the gas flowing upward from the bottom of the tower. An atomizing nozzle can also be installed on the secondary spray pipe 610, through which the spray liquid can be atomized, thereby increasing the contact area between the gas to be dusted and the spray liquid, so as to achieve a better dust removal effect.

[0051] In this regard, it is advantageous that the secondary spray layer 600 can be shaped so that it has an increased cross-sectional area and a reduced height compared to an original or conventional secondary spray layer while maintaining a constant volume. It is further advantageous that the height of the secondary spray layer 600 can be equal to or less than half the height of an original or conventional secondary spray layer while maintaining a constant volume.

[0052] Therefore, the secondary spray layer 600 is flattened, and the structural height of the entire water-washing dust removal tower decreases as the height of the primary spray layer decreases. Thus, the height of the equipment can be reduced while ensuring the dust removal efficiency, so that the water-washing dust removal tower can be used in situations where the equipment height is limited.

[0053] According to some embodiments of the present disclosure, in particular, referring to Figure 1 , the cross-sectional area of ​​the entire water-washing dust removal tower can be increased as the cross-sectional area of ​​the primary spray layer 300 increases, so that the cross-sectional area of ​​the water-washing dust removal tower is equal to the cross-sectional area of ​​the primary spray layer 300. For example, as shown in the figure, except for the top, the entire water-washing dust removal tower is constructed as a rectangular parallelepiped. Thus, a flattened primary spray layer 300 can be easily realized. This is of course also applicable in the case where there are 600 or more secondary spray layers.

[0054] According to some embodiments of the present disclosure, a filler support plate may be provided at the bottom of the filler washing layer 400, on which fillers may be placed in a random pile, and a filler pressing plate may be provided above the fillers, thereby preventing the fillers from being blown away by the rising airflow.

[0055] According to some embodiments of the present disclosure, the gas outlet 120 may be located on the top of the tower body 100 above the filler demisting layer 500, and an outlet hood may be provided on the gas outlet 120 to facilitate the discharge of gas and achieve buffering of the air flow. In this case, the top of the tower body 100 may be configured in the shape of a truncated pyramid, such as Figure 2 shown.

[0056] According to some embodiments of the present disclosure, in particular, referring to Figure 2 A filtering device 210, such as a filter net, may be provided in the water storage layer 200 to filter solid waste in the water.

[0057] According to some embodiments of the present disclosure, in particular, referring to Figure 2 A first discharge port 410 may be provided on the filler washing layer 400, and / or a second discharge port 510 may be provided on the filler demisting layer 500 for filler replacement.

[0058] According to some embodiments of the present disclosure, in particular, referring to Figure 2 A first inspection hole 320 may be provided on the primary spray layer 300. Similarly, a second inspection hole 620 may also be provided on the secondary spray layer 600. This allows for inspection of the water-washing dust removal tower.

[0059] According to some embodiments of the present disclosure, in particular, referring to Figure 2 As shown in the figure, the air inlet 110 can be directly connected to the primary spray layer 300.

[0060] According to some embodiments of the present disclosure, the gas outlet 120 may be located on an extension connected to the packing demisting layer 500 and face vertically downward, and a U-shaped chimney may be connected to the vertically downward-facing gas outlet, so that the exhausted gas may flow downward first and then flow upward. This may facilitate further gas-liquid separation. In addition, in this case, the top of the tower body 100 may be omitted, so that the packing demisting layer 500 is the top layer of the tower body 100. This may enable the tower body 100 to be constructed as a rectangular parallelepiped as a whole, thereby facilitating the manufacture of a water-washing dust removal tower.

[0061] As described above, the water-washing dust removal tower according to the present disclosure can be constructed as a one-stage or two-stage or more-stage water-washing dust removal tower. The water-washing dust removal tower can be sprayed with circulating water, wherein the bottom of the tower can be used as a water storage layer. The water storage layer can provide spray liquid to the spray pipes of each spray layer via the circulating pump and the circulating pipeline of the circulating system.

[0062] Therefore, when operating the water-washing dust removal tower according to the present disclosure, the spray pipes at each level extract the supernatant in the water storage layer through the circulation system as the spray liquid to spray and wash the gas to be dusted; after the gas-liquid separation through the packing demisting layer, the purified gas flows to the gas outlet and is discharged from the gas outlet hood; and the waste liquid flows to the water storage layer after being fully in contact with the packing washing layer, and flows to the bottom of the water storage layer through the filtering device of the water storage layer, and can be regularly dispatched to the sewage discharge port through the electric valve. When the corresponding spray pipe fails, it can be repaired through the corresponding inspection hole; and when the corresponding packing needs to be replaced, it can be replaced through the corresponding discharge port.

[0063] Therefore, according to an embodiment of the present disclosure, a method for operating a water-washing dust removal tower according to the present disclosure is also provided, and the method may include the following steps: after the gas to be dusted enters the first-level spray layer 300 through the air inlet 110, the first-level spray pipe 310 extracts spray liquid from the water storage layer 200 through the circulation system to spray and wash the gas to be dusted; after passing through the packing demisting layer 500 for gas-liquid separation, the gas purified by the first-level spray layer 300 flows to the gas outlet 120 and is discharged from the gas outlet 120, and the waste liquid flows to the water storage layer 200 after fully contacting with the packing washing layer 400 and is regularly discharged from the water storage layer 200.

[0064] According to some embodiments of the present disclosure, if a secondary spray layer 600 is arranged between the packing washing layer 400 and the packing demisting layer 500, and a secondary spray pipe 610 for spraying from top to bottom is arranged in the secondary spray layer 600, and the secondary spray pipe 610 is also connected to the water storage layer 200 through a circulation pipeline, then the gas to be dusted can be purified by the secondary spray layer 600 after being purified by the primary spray layer 300, and the secondary spray pipe 610 also extracts spray liquid from the water storage layer 200 through the circulation system to spray and wash the gas to be dusted, and the gas purified by the secondary spray layer 600 flows to the gas outlet 120 and is discharged from the gas outlet 120.

[0065] In addition, the water inlet and outlet electric valves of the water storage layer can be controlled by PLC. The water storage layer can adjust the water change frequency according to the actual situation during use. In addition, both the inlet and outlet can be equipped with manual regulating valves to facilitate temporary operations such as maintenance.

[0066] In summary, the present disclosure reduces the overall equipment height by increasing the cross-sectional area, thereby ensuring the dust removal efficiency while enabling the water-wash dust removal tower of the present disclosure to be used in situations where the height is limited. In addition, this can also reduce energy consumption and facilitate maintenance.

[0067] The features disclosed in this application document may be important and may be implemented for the implementation of the embodiments in different design solutions not only individually but also in any combination. The present disclosure is not limited to the embodiments shown, but includes or extends to all technical equivalents that may fall within the effective scope of the attached claims.

Claims

1. A water-washing dust removal tower, comprising a tower body (100), an air inlet (110) located at the bottom of the tower body (100), and an air outlet (120) located at the top of the tower body (100); a water storage layer (200), a primary spray layer (300), a filler washing layer (400), and a filler demisting layer (500) are sequentially arranged inside the tower body (100) from bottom to top, characterized in that: A primary spray pipe (310) for spraying from top to bottom is arranged in the primary spray layer (300), and the primary spray pipe (310) is connected to the water storage layer (200) through a circulation pipeline; the primary spray layer (300) is formed so that the primary spray layer (300) has an increased cross-sectional area and a reduced height when the volume remains unchanged compared with the original primary spray layer.

2. The water-washing dust removal tower according to claim 1, characterized in that: When the volume remains unchanged, the height of the primary spray layer (300) is equal to or less than half the height of the original primary spray layer.

3. The water-washing dust removal tower according to claim 1, characterized in that: A secondary spray layer (600) is provided between the filler washing layer (400) and the filler demisting layer (500), and a secondary spray pipe (610) for spraying from top to bottom is provided in the secondary spray layer (600), and the secondary spray pipe (610) is also connected to the water storage layer (200) through a circulation pipeline.

4. The water-washing dust removal tower according to claim 3, characterized in that: The secondary spray layer (600) is shaped such that it has an increased cross-sectional area and a decreased height while maintaining a constant volume compared to the original secondary spray layer.

5. The water-washing dust removal tower according to claim 4, characterized in that: When the volume remains unchanged, the height of the secondary spray layer (600) is equal to or less than half the height of the original secondary spray layer.

6. The water-washing dust removal tower according to any one of claims 1 to 5, characterized in that: The cross-sectional area of ​​the entire water-washing dust removal tower increases as the cross-sectional area of ​​the primary spray layer (300) increases, so that the cross-sectional area of ​​the water-washing dust removal tower is equal to the cross-sectional area of ​​the primary spray layer (300).

7. The water-washing dust removal tower according to any one of claims 1 to 5, characterized in that: A packing support plate is arranged at the bottom of the packing washing layer (400), the packing is placed on the support plate in a random pile, and a packing pressing plate is arranged above the packing.

8. The water-washing dust removal tower according to any one of claims 1 to 5, characterized in that: The air outlet (120) is located on the top of the tower body (100) above the filler demisting layer (500), and an air outlet hood is provided on the air outlet (120).

9. The water-washing dust removal tower according to any one of claims 1 to 5, characterized in that: A filtering device (210) is provided in the water storage layer (200).

10. The water-washing dust removal tower according to any one of claims 1 to 5, characterized in that: A first discharge port (410) is provided on the filler washing layer (400) and / or a second discharge port (510) is provided on the filler demisting layer (500).

11. The water-washing dust removal tower according to claim 1, characterized in that: A first inspection hole (320) is provided on the primary spray layer (300).

12. The water-washing dust removal tower according to claim 3, characterized in that: A second inspection hole (620) is provided on the secondary spray layer (600).

13. The water-washing dust removal tower according to any one of claims 1 to 5, characterized in that: The gas outlet (120) is located on an extension portion connected to the filler demisting layer (500) and faces vertically downward, and a U-shaped chimney can be connected to the gas outlet facing vertically downward, so that the exhausted gas can flow downward first and then upward.

14. A method for operating a water-wash dust removal tower according to any one of claims 1 to 13, characterized in that: The method comprises the following steps: After the gas to be dusted enters the primary spray layer (300) through the air inlet (110), the primary spray pipe (310) extracts spray liquid from the water storage layer (200) through the circulation system to spray and wash the gas to be dusted; after passing through the packing demisting layer (500) for gas-liquid separation, the gas purified by the primary spray layer (300) flows to the gas outlet (120) and is discharged from the gas outlet (120), while the waste liquid flows to the water storage layer (200) after being fully in contact with the packing washing layer (400) and is regularly discharged from the water storage layer (200).

15. The method according to claim 14, characterized in that If a secondary spray layer (600) is provided between the packing washing layer (400) and the packing demisting layer (500), and a secondary spray pipe (610) for spraying from top to bottom is provided in the secondary spray layer (600), and the secondary spray pipe (610) is also connected to the water storage layer (200) through a circulation pipeline, then the gas to be dusted is purified by the secondary spray layer (600) after being purified by the primary spray layer (300), and the secondary spray pipe (610) also extracts spray liquid from the water storage layer (200) through a circulation system to spray and wash the gas to be dusted, and the gas purified by the secondary spray layer (600) flows to the gas outlet (120) and is discharged from the gas outlet (120).

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