Liquid spraying structure for flue gas purification equipment

Abstract

The utility model provides a liquid spraying structure for flue gas purification equipment, which comprises a liquid distribution pipe provided with a plurality of upper nozzles and a plurality of lower nozzles; the plurality of upper nozzles form one or more upper nozzle layers, the plurality of lower nozzles form one or more lower nozzle layers, and the plurality of upper nozzles and the plurality of lower nozzles are distributed in a vertical crossing grid manner; the upper nozzles in the upper nozzle layer are located in the same horizontal section, the lower nozzles in the lower nozzle layer are located in the same horizontal section, and the upper nozzle layer and the lower nozzle layer are arranged in parallel in the horizontal direction. The upper nozzle layer and the lower nozzle layer are arranged at intervals in the vertical direction. The spraying structure disclosed by the utility model is beneficial to preventing gas from instantaneously penetrating through a liquid film formed by liquid spraying, so that the retention time of the gas in a liquid film space formed by liquid spraying can be prolonged, the opportunity that the gas penetrates through the liquid film for multiple times can be provided, and more efficient gas-liquid contact efficiency can be provided in a limited space.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification, in particular to a liquid spraying structure for flue gas purification equipment. Background Art

[0002] Flue gas purification equipment refers to a range of devices used to reduce or eliminate harmful substances in flue gases generated during industrial production processes to protect the environment and human health. These devices are typically used to treat exhaust gases generated by the combustion of fuels such as coal, oil, and gas, as well as exhaust gases generated by certain industrial production processes. The main purpose of flue gas purification is to remove particulate matter, sulfur oxides (SOx), nitrogen oxides (NOx), heavy metals, acid gases, and other harmful gases from flue gas.

[0003] Existing flue gas purification equipment generally utilizes a liquid spray structure that sprays a scrubbing liquid, allowing the flue gas to come into contact with the scrubbing liquid, thereby removing particulate matter, harmful gases, and other substances from the flue gas. However, existing spray structures have the following drawbacks: Generally, achieving ultra-low emissions requires a high liquid-to-gas ratio to remove high-concentration pollutants. This leads to excessive nozzles being arranged on the same cross-section, with nozzle overlap ranging from 300% to 500%. Liquid sprayed from a nozzle collides with adjacent nozzles before fully opening the spray plume, creating gaps and uneven film thickness. This also produces a large number of small particles, severely impacting absorption effectiveness. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a liquid spraying structure for flue gas purification equipment.

[0005] According to the utility model, a liquid spraying structure for a flue gas purification device includes: a liquid distribution pipe, on which a plurality of upper nozzles and a plurality of lower nozzles are provided;

[0006] The plurality of upper nozzles form one or more upper nozzle layers, the plurality of lower nozzles form one or more lower nozzle layers, and the plurality of upper nozzles and the plurality of lower nozzles are arranged in a three-dimensional cross-grid distribution;

[0007] The plurality of upper nozzles in the upper nozzle layer are located in the same horizontal cross-section, the plurality of lower nozzles in the lower nozzle layer are located in the same horizontal cross-section, and the upper nozzle layer and the lower nozzle layer are arranged parallel to each other in the horizontal direction;

[0008] The upper nozzle layer and the lower nozzle layer are spaced apart in a vertical direction.

[0009] Preferably, the overlap of the spray coverage areas of the plurality of upper nozzles located in the same horizontal cross section is less than or equal to 150%;

[0010] The overlapping degree of the spray coverage areas of the multiple lower nozzles located in the same horizontal cross section is less than or equal to 150%.

[0011] Preferably, the overlap of the spray coverage areas of the plurality of upper nozzles located in the same horizontal cross section is greater than 150%;

[0012] The overlap of the spray coverage areas of the multiple lower nozzles located in the same horizontal cross section is greater than 150%;

[0013] The vertical spacing between the adjacent upper nozzle layer and the lower nozzle layer is y1, and the nozzle opening distances of the upper nozzle and the lower nozzle are both L, 0.5L≦y1≦0.9L;

[0014] When the upper nozzle layer is configured as a multi-layer structure, the vertical distance between two adjacent upper nozzle layers is y2, 0.5L≦y2≦0.9L;

[0015] When the lower nozzle layer is configured as a multi-layer structure, a vertical distance between two adjacent lower nozzle layers is y3, and 0.5L≦y3≦0.9L.

[0016] Preferably, the liquid spraying structure further includes a smoke guide plate;

[0017] The smoke guide plate is arranged on the inner wall of the spray chamber, and is used to guide the smoke to the radial center position of the spray area.

[0018] Preferably, the inclination angle of the smoke guide plate is 30 degrees to 90 degrees.

[0019] Preferably, among the plurality of upper nozzles: the upper nozzle adjacent to the inner wall of the spray chamber is a first upper nozzle, and the spraying direction is toward the inner wall of the spray chamber; the remaining upper nozzles are second upper nozzles, and the spraying direction is upward;

[0020] Among the multiple lower nozzles: the lower nozzle adjacent to the inner wall of the spray chamber is the first lower nozzle, and the spray direction is toward the inner wall of the spray chamber; the remaining lower nozzles are the second lower nozzles, and the spray direction is downward.

[0021] Preferably, the nozzle flow rate of the first upper nozzle is greater than the nozzle flow rate of the second upper nozzle;

[0022] The nozzle flow rate of the first lower nozzle is greater than the nozzle flow rate of the second lower nozzle.

[0023] Preferably, the nozzle flow rate of the first upper nozzle is 20% to 40% greater than the nozzle flow rate of the second upper nozzle;

[0024] The nozzle flow rate of the first lower nozzle is 20% to 40% greater than the nozzle flow rate of the second lower nozzle.

[0025] Preferably, the upper nozzle layer is provided as one layer; the lower nozzle layer is provided as two layers, namely a first lower nozzle layer and a second lower nozzle layer;

[0026] The upper nozzle layer, the first lower nozzle layer and the second lower nozzle layer are arranged parallel to each other along the horizontal direction;

[0027] The upper nozzle layer, the first lower nozzle layer and the second lower nozzle layer are arranged in sequence from top to bottom along the vertical direction;

[0028] The upper nozzle layer includes a plurality of upper nozzles spaced apart along the horizontal direction;

[0029] The first lower nozzle layer includes a plurality of lower nozzles spaced apart along the horizontal direction, the second lower nozzle layer includes a plurality of lower nozzles spaced apart along the horizontal direction, and the lower nozzles of the first lower nozzle layer and the lower nozzles of the second lower nozzle layer are staggered along the horizontal direction;

[0030] The upper nozzles of the upper nozzle layer and the lower nozzles of the first lower nozzle layer are staggered along the horizontal direction.

[0031] Preferably, the upper nozzle layer is provided with two layers, namely a first upper nozzle layer and a second upper nozzle layer; the lower nozzle layer is provided with two layers, namely a first lower nozzle layer and a second lower nozzle layer;

[0032] The first upper nozzle layer, the second upper nozzle layer, the first lower nozzle layer, and the second lower nozzle layer are arranged parallel to each other along the horizontal direction;

[0033] The first upper nozzle layer, the second upper nozzle layer, the first lower nozzle layer and the second lower nozzle layer are arranged in sequence from top to bottom along the vertical direction;

[0034] The first upper nozzle layer includes a plurality of upper nozzles spaced apart along the horizontal direction, the second upper nozzle layer includes a plurality of upper nozzles spaced apart along the horizontal direction, and the upper nozzles of the first upper nozzle layer and the upper nozzles of the second upper nozzle layer are staggered along the horizontal direction;

[0035] The first lower nozzle layer includes a plurality of lower nozzles spaced apart along the horizontal direction, the second lower nozzle layer includes a plurality of lower nozzles spaced apart along the horizontal direction, and the lower nozzles of the first lower nozzle layer and the lower nozzles of the second lower nozzle layer are staggered along the horizontal direction;

[0036] The upper nozzles of the first upper nozzle layer and the lower nozzles of the first lower nozzle layer are staggered along the horizontal direction.

[0037] Compared with the prior art, the utility model has the beneficial effects as follows:

[0038] 1、 The utility model discloses a plurality of nozzle layers are seted up, and each nozzle layer forms a shower horizontal section, and the nozzle of a plurality of nozzle layers is in three -dimensional cross grid distribution, so that the overlapping degree of the shower coverage area of a plurality of nozzles in the same horizontal section can be less than or equal to 150%, and then the liquid that the nozzle sprays has less collision with adjacent nozzles before the complete opening of the fog crown, the film thickness that the nozzle sprays is uniform, sufficiently exerts the homogenization film effect of nozzle, and a large number of small particles will not be produced.

[0039] 2、 The liquid shower structure of the utility model is the distribution structure of multiple sections and multiple directions, improves the contact area and contact time of the washing liquid and flue gas in the equipment, is favorable for preventing that flue gas instantaneously penetrates the liquid film formed by liquid shower, can improve the residence time of flue gas in the liquid film space formed by liquid shower, can provide the opportunity of multiple flue gas penetration liquid film, provides more efficient gas-liquid contact efficiency in limited space.

[0040] 3、 The utility model discloses the flue gas guide plate that is set up in the inner wall of purification equipment, and the flue gas guide plate is set up in the vertical range of shower, is set up between two horizontal sections, when flue gas passes through the flue gas guide plate, can reduce the horizontal section when flue gas passes through the shower area, makes flue gas gather to radial, guarantees that flue gas does not preferentially pass through the equipment wall from the low pressure area, causes short circuit.

[0041] 4、 The flow of the nozzle of the same horizontal section in the utility model is not the same, and the nozzle flow close to the equipment wall is 20-40% larger than the nozzle flow in the middle, and the purpose is to increase the radial flow of flue gas in the shower area through the non-uniform shower arrangement, and more efficient gas-liquid contact efficiency is provided in limited space. BRIEF DESCRIPTION OF DRAWINGS

[0042] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of non-restrictive embodiments with reference to the accompanying drawings:

[0043] Figure 1 It is cross section schematic for liquid shower structure for flue gas purification equipment Figure 1 ;

[0044] Figure 2 It is cross section schematic for liquid shower structure for flue gas purification equipment Figure 2 .

[0045] In the drawing, it is shown that:

[0046] liquid distribution pipe 1 upper nozzle layer 4

[0047] upper nozzle 2 lower nozzle layer 5

[0048] First upper nozzle 201 Smoke guide plate 6

[0049] Second upper nozzle 202 branch pipe 7

[0050] Lower nozzle 3 Nozzle expansion boundary 8

[0051] First lower nozzle 301 resistance element 9

[0052] The second lower nozzle 302 sprays the interior wall 10 DETAILED DESCRIPTION

[0053] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0054] Example 1:

[0055] like Figure 1 and Figure 2 As shown, this embodiment provides a liquid spray structure for flue gas purification equipment, comprising: a liquid distribution pipe 1, on which are disposed a plurality of upper nozzles 2 and a plurality of lower nozzles 3; the plurality of upper nozzles 2 forming one or more upper nozzle layers 4, the plurality of lower nozzles 3 forming one or more lower nozzle layers 5, the plurality of upper nozzles 2 and the plurality of lower nozzles 3 being arranged in a three-dimensional cross-grid arrangement; the plurality of upper nozzles 2 within the upper nozzle layer 4 being located within the same horizontal cross-section, the plurality of lower nozzles 3 within the lower nozzle layer 5 being located within the same horizontal cross-section, the upper nozzle layer 4 and the lower nozzle layer 5 being arranged horizontally parallel; the upper nozzle layer 4 and the lower nozzle layer 5 being spaced apart vertically. When both the upper nozzle layer 4 and the lower nozzle layer 5 are provided as a single layer, the upper nozzle layer 4 and the lower nozzle layer 5 are vertically offset. When both the upper nozzle layer 4 and / or the lower nozzle layer 5 are provided as multiple layers, the adjacent nozzle layers are vertically offset.

[0056] In this embodiment, the liquid distribution pipe 1 includes a main pipe and multiple branch pipes 7. The upper nozzle 2 and the lower nozzle 3 are connected to the main pipe via the branch pipes 7. The nozzle expansion boundaries 8 of the upper nozzle 2 and the lower nozzle 3 form their respective opening distances L.

[0057] The liquid spray structure further includes a smoke guide plate 6, which is arranged on the inner wall 10 of the spray chamber and is used to guide the smoke to the radial center of the spray area. The smoke guide plate 6 has an inclination angle of 30 to 90 degrees.

[0058] During the spraying process, smoke often faces resistance and concentrates toward the wall due to high central coverage. The smoke guide plate 6 guides smoke based on the spraying layout. By increasing smoke guidance, the smoke's residence time in the concentrated spray area is increased. The inclination angle of the smoke guide plate 6 is the angle between the guide plate and the equipment wall.

[0059] Among the multiple upper nozzles 2, the upper nozzle 2 adjacent to the spray chamber inner wall 10 is the first upper nozzle 201, which sprays toward the spray chamber inner wall 10. The remaining upper nozzles 2 are the second upper nozzles 202, which spray upward. Among the multiple lower nozzles 3, the lower nozzle 3 adjacent to the spray chamber inner wall 10 is the first lower nozzle 301, which sprays toward the spray chamber inner wall 10. The remaining lower nozzles 3 are the second lower nozzles 302, which spray downward. The nozzle flow rate of the first upper nozzle 201 is greater than the nozzle flow rate of the second upper nozzle 202; the nozzle flow rate of the first lower nozzle 301 is greater than the nozzle flow rate of the second lower nozzle 302.

[0060] In this embodiment, the nozzle flow rate of the first upper nozzle 201 is 20% to 40% greater than the nozzle flow rate of the second upper nozzle 202 ; the nozzle flow rate of the first lower nozzle 301 is 20% to 40% greater than the nozzle flow rate of the second lower nozzle 302 .

[0061] In this embodiment, the overlap of the spray coverage areas of multiple upper nozzles 2 located in the same horizontal cross-section is less than or equal to 150%. The overlap of the spray coverage areas of multiple lower nozzles 3 located in the same horizontal cross-section is less than or equal to 150%. The overlap of the spray coverage areas = the coverage area of ​​a single nozzle × the number of nozzles / the area of ​​the same horizontal plane.

[0062] In other embodiments, the overlap of the spray coverage areas of multiple upper nozzles 2 located in the same horizontal cross-section is greater than 150%; the overlap of the spray coverage areas of multiple lower nozzles 3 located in the same horizontal cross-section is greater than 150%; the vertical spacing between adjacent upper nozzle layers 4 and lower nozzle layers 5 is y1, and the nozzle opening distances of the upper nozzles 2 and the lower nozzles 3 are both L, 0.5L≦y1≦0.9L; when the upper nozzle layer 4 is set to multiple layers, the vertical spacing between two adjacent upper nozzle layers 4 is y2, 0.5L≦y2≦0.9L; when the lower nozzle layer 5 is set to multiple layers, the vertical spacing between two adjacent lower nozzle layers 5 is y3, 0.5L≦y3≦0.9L.

[0063] The overlap of the spray coverage area refers to the degree to which the liquid sprayed from the nozzle can completely cover the cross-section of the spray tower. Insufficient spray coverage will result in some areas without spray liquid, causing gas short-circuiting problems and affecting dust removal effectiveness.

[0064] Spray coverage directly impacts the dust removal efficiency of a spray tower. Insufficient spray coverage can result in areas without spray liquid, allowing gas to short-circuit through these areas without effective contact with the spray liquid, thus reducing dust removal efficiency. Therefore, ensuring a reasonable spray coverage is a key factor in ensuring effective dust removal in a spray tower.

[0065] Generally, the spray overlap of each spray layer is required to be between 200% and 300%. This range can ensure that the spray liquid can completely cover the cross section of the spray tower, avoid gas short circuit problems, and thus improve dust removal efficiency.

[0066] The liquid sprayed from the nozzle collides with the adjacent nozzle before the mist crown is fully opened, resulting in gaps, uneven thickness of the spray mist crown film, and a large number of small particles, which seriously affect the absorption effect.

[0067] In this embodiment, the overlap of the spray coverage areas of the multiple lower nozzles located in the same horizontal cross-section is less than or equal to 150%. The liquid sprayed from the nozzle rarely collides with the adjacent nozzle before the mist crown is fully opened. The film thickness sprayed from the nozzle is uniform, and the homogenizing film effect of the nozzle is fully exerted without generating a large number of small particles.

[0068] In this embodiment, the upper nozzle layer 4 is provided with two layers, namely the first upper nozzle layer and the second upper nozzle layer; the lower nozzle layer 5 is provided with two layers, namely the first lower nozzle layer and the second lower nozzle layer; the first upper nozzle layer, the second upper nozzle layer, the first lower nozzle layer and the second lower nozzle layer are arranged parallel to each other in the horizontal direction; the first upper nozzle layer, the second upper nozzle layer, the first lower nozzle layer and the second lower nozzle layer are arranged in sequence from top to bottom in the vertical direction; the first upper nozzle layer includes a plurality of upper nozzles 2 arranged at intervals in the horizontal direction, the second upper nozzle layer includes a plurality of upper nozzles 2 arranged at intervals in the horizontal direction, and the upper nozzles 2 of the first upper nozzle layer and the upper nozzles 2 of the second upper nozzle layer are staggered in the horizontal direction; the first lower nozzle layer includes a plurality of lower nozzles 3 arranged at intervals in the horizontal direction, the second lower nozzle layer includes a plurality of lower nozzles 3 arranged at intervals in the horizontal direction, and the lower nozzles 3 of the first lower nozzle layer and the lower nozzles 3 of the second lower nozzle layer are staggered in the horizontal direction; the upper nozzles 2 of the first upper nozzle layer and the lower nozzles 3 of the first lower nozzle layer are staggered in the horizontal direction.

[0069] In other embodiments, the upper nozzle layer 4 is set as one layer; the lower nozzle layer 5 is set as two layers, namely the first lower nozzle layer and the second lower nozzle layer; the upper nozzle layer 4, the first lower nozzle layer and the second lower nozzle layer are arranged parallel to each other in the horizontal direction; the upper nozzle layer 4, the first lower nozzle layer and the second lower nozzle layer are arranged in sequence from top to bottom in the vertical direction; the upper nozzle layer 4 includes a plurality of upper nozzles 2 arranged at intervals along the horizontal direction; the first lower nozzle layer includes a plurality of lower nozzles 3 arranged at intervals along the horizontal direction, the second lower nozzle layer 5 includes a plurality of lower nozzles arranged at intervals along the horizontal direction, the lower nozzles 3 of the first lower nozzle layer and the lower nozzles 3 of the second lower nozzle layer are staggered in the horizontal direction; the upper nozzles 2 of the upper nozzle layer 4 and the lower nozzles 3 of the first lower nozzle layer are staggered in the horizontal direction.

[0070] Traditionally, the spray layers require nozzle overlap of 300-500% and are arranged on the same horizontal cross section. This embodiment controls the nozzle overlap of the same cross section to 150% by adjusting the distance between the main and branch pipes. This multi-layer cross section arrangement meets the liquid-to-gas ratio requirement.

[0071] Example 2:

[0072] Those skilled in the art may understand this embodiment as a more specific description of Embodiment 1.

[0073] This embodiment provides a liquid spray structure for flue gas purification equipment. This structure involves the internal arrangement of a liquid spray structure within the flue gas purification equipment. This structure is suitable for gas-liquid mass and heat transfer during flue gas dust removal and harmful pollutant removal, providing more efficient gas-liquid contact within a limited space. The liquid spray structure includes a main pipe, a main branch pipe, a branch pipe, and a terminal pressure nozzle.

[0074] In this embodiment of the liquid spray structure, the overlap of nozzle coverage within the same horizontal cross-section does not exceed 150%, and the nozzle spacing x is evenly distributed according to the inner diameter of the scrubber. If the overlap exceeds 150%, a three-dimensional cross-grid arrangement is adopted, with the vertical nozzle spacing y being no greater than 0.9 times the nozzle opening distance L and no less than 0.5 times the nozzle opening distance L.

[0075] like Figure 1 and Figure 2 As shown in the figure, when a high flow rate of washing liquid is required, a single layer of liquid distribution pipes can be configured with up to four spray sections: two downward and two upward. When configured with three layers, two downward and one upward. All upward and downward branches are led from the central main pipe, and the vertical distance requirements are met by varying the length of the upward and downward branches.

[0076] For spraying of mass transfer exchange stages with the same liquid composition, the nozzles are arranged in a three-dimensional staggered pattern, and the number of nozzles is configured according to the spray overlap required by the design. When the nozzles are arranged in a three-dimensional cross grid, the main distribution pipes for liquids with the same composition are in one layer.

[0077] For the absorption of high-concentration pollutants, a double-circulation or multi-circulation absorption process is required. The liquid components of each cycle are different, and the liquid of each component realizes a mass transfer exchange level through a certain liquid-to-gas ratio.

[0078] For example: In a certain ammonia desulfurization process, it is necessary to add 40000mg / Nm 3 SO2 removal to 35mg / Nm 3 , it is calculated that the total spray density needs to reach 150%. Three liquid components need to be set up for absorption. Each absorption liquid is a mass transfer exchange stage. Each mass transfer exchange stage includes multiple nozzle layers, spraying one absorption liquid.

[0079] For the spraying of mass transfer exchange stages with the same liquid components, the nozzles are arranged in a three-dimensional staggered manner and the number of nozzles is configured according to the spray overlap required by the design.

[0080] The spraying directions of the nozzle include downward, upward and outward. The nozzle close to the outer wall of the washing equipment is directed toward the outer wall. Its purpose is to guide the direction of flue gas flow and increase the residence time of flue gas.

[0081] The main pipe and the branch pipe are connected by flanges, and an adjustable resistance element 9, such as an orifice plate or a valve, is provided on the branch pipe. The resistance element is selected based on the flow properties to ensure balanced nozzle pressure.

[0082] A flue gas guide plate 6, also called a guide wing plate or a flue gas distribution baffle, is provided on the wall of the washing tower. The angle of the guide plate is 30 to 90 degrees. The purpose of the guide plate is to ensure that the flue gas flows in a horizontal cross flow and increase the residence time of the flue gas.

[0083] The guide wing plates arranged on the inner wall of the purification equipment of this embodiment are arranged within the vertical range of the spray. When the flue gas passes through the guide wing plates, the cross-section of the flue gas passing through the spray area can be reduced (5% to 10%), and the flue gas is gathered radially to ensure that the flue gas does not preferentially pass through the equipment wall in the low-pressure area, causing a short circuit.

[0084] The horizontal cross-sectional overlap of the spray coverage of the spray nozzles of the separate liquid collecting main and branch pipes shall not exceed 150%. If the spray overlap of the independent washing and mass transfer exchange stages is greater than 150%, a three-dimensional cross-grid arrangement shall be adopted, with the nozzle spacing not greater than 0.9 times the nozzle opening distance and not less than 0.5-0.8 times the nozzle opening distance.

[0085] The liquid spray structure of this embodiment is a spray structure with multiple cross-sections, multiple interfaces, and multiple directions, which increases the contact area and contact time between the washing liquid and the gas in the equipment, is beneficial to preventing the gas from instantly penetrating the liquid film formed by the liquid spray, can increase the residence time of the gas in the liquid film space formed by the liquid spray, and can provide multiple opportunities for the gas to penetrate the liquid film, providing more efficient gas-liquid contact efficiency in a limited space.

[0086] In this embodiment, the overlap of the nozzle coverage area of ​​the same cross-section does not exceed 150%, reducing the efficiency drop caused by water film rupture and flue gas short-circuiting due to spray collision; in order to achieve the designed spray volume, the spray is changed to a multi-section arrangement, so that the single-layer coverage rate can also reach 600% without increasing the main spray circulation pump and the main spray layer.

[0087] In this embodiment, the flow rates of the nozzles configured with the same cross-section are different. The flow rate of the nozzles close to the equipment wall is 20% to 40% larger than that of the nozzles in the middle. The purpose is to increase the radial flow of flue gas in the spray area through the non-uniform spray arrangement, thereby providing more efficient gas-liquid contact efficiency in a limited space.

[0088] The spray structure of the present invention is beneficial to preventing gas from instantly penetrating the liquid film formed by liquid spraying, can increase the residence time of gas in the liquid film space formed by liquid spraying, can provide multiple opportunities for gas to penetrate the liquid film, and provide more efficient gas-liquid contact efficiency in a limited space.

[0089] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0090] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A liquid spraying structure for flue gas purification equipment, characterized in that: include: A liquid distribution pipe (1), wherein the liquid distribution pipe (1) is provided with a plurality of upper nozzles (2) and a plurality of lower nozzles (3); The plurality of upper nozzles (2) form one or more upper nozzle layers (4), the plurality of lower nozzles (3) form one or more lower nozzle layers (5), and the plurality of upper nozzles (2) and the plurality of lower nozzles (3) are arranged in a three-dimensional cross-grid distribution; The plurality of upper nozzles (2) in the upper nozzle layer (4) are located in the same horizontal cross-section, the plurality of lower nozzles (3) in the lower nozzle layer (5) are located in the same horizontal cross-section, and the upper nozzle layer (4) and the lower nozzle layer (5) are arranged parallel to each other in the horizontal direction; The upper nozzle layer (4) and the lower nozzle layer (5) are arranged at intervals in the vertical direction.

2. The liquid spraying structure for flue gas purification equipment according to claim 1, characterized in that: The overlapping degree of the spray coverage areas of the plurality of upper nozzles (2) located in the same horizontal cross section is less than or equal to 150%; The overlapping degree of the spray coverage areas of the plurality of lower nozzles (3) located in the same horizontal cross section is less than or equal to 150%.

3. The liquid spraying structure for flue gas purification equipment according to claim 1, characterized in that: The overlap of the spray coverage areas of the plurality of upper nozzles (2) located in the same horizontal cross section is greater than 150%; The overlap of the spray coverage areas of the plurality of lower nozzles (3) located in the same horizontal cross section is greater than 150%; The vertical spacing between the adjacent upper nozzle layer (4) and the lower nozzle layer (5) is y1, and the nozzle opening distances of the upper nozzle (2) and the lower nozzle (3) are both L, 0.5L≦y1≦0.9L; When the upper nozzle layer (4) is configured as a multi-layer structure, the vertical distance between two adjacent upper nozzle layers (4) is y2, and 0.5L≦y2≦0.9L; When the lower nozzle layer (5) is configured as a multi-layer structure, the vertical distance between two adjacent lower nozzle layers (5) is y3, and 0.5L≦y3≦0.9L.

4. The liquid spraying structure for flue gas purification equipment according to claim 1, characterized in that: The liquid spraying structure further includes a smoke guide plate (6); The smoke guide plate (6) is arranged on the inner wall (10) of the spray chamber, and the smoke guide plate (6) is used to guide the smoke to the radial center position of the spray area.

5. The liquid spraying structure for flue gas purification equipment according to claim 4, characterized in that: The inclination angle of the smoke guide plate (6) is 30 degrees to 90 degrees.

6. The liquid spraying structure for flue gas purification equipment according to claim 1, characterized in that: Among the plurality of upper nozzles (2): the upper nozzle (2) adjacent to the inner wall (10) of the spray chamber is a first upper nozzle (201), and the spraying direction is toward the inner wall (10) of the spray chamber; the remaining upper nozzles (2) are second upper nozzles (202), and the spraying direction is upward; Among the multiple lower nozzles (3): the lower nozzle (3) adjacent to the inner wall (10) of the spray chamber is a first lower nozzle (301), and the spraying direction is toward the inner wall (10) of the spray chamber; the remaining lower nozzles (3) are second lower nozzles (302), and the spraying direction is downward.

7. The liquid spraying structure for flue gas purification equipment according to claim 6, characterized in that: The nozzle flow rate of the first upper nozzle (201) is greater than the nozzle flow rate of the second upper nozzle (202); The nozzle flow rate of the first lower nozzle (301) is greater than the nozzle flow rate of the second lower nozzle (302).

8. The liquid spraying structure for flue gas purification equipment according to claim 7, characterized in that: The nozzle flow rate of the first upper nozzle (201) is 20% to 40% greater than the nozzle flow rate of the second upper nozzle (202); The nozzle flow rate of the first lower nozzle (301) is 20% to 40% greater than the nozzle flow rate of the second lower nozzle (302).

9. The liquid spraying structure for flue gas purification equipment according to claim 1, characterized in that: The upper nozzle layer (4) is provided as one layer; the lower nozzle layer (5) is provided as two layers, namely a first lower nozzle layer and a second lower nozzle layer; The upper nozzle layer (4), the first lower nozzle layer and the second lower nozzle layer are arranged parallel to each other along the horizontal direction; The upper nozzle layer (4), the first lower nozzle layer and the second lower nozzle layer are arranged in sequence from top to bottom along the vertical direction; The upper nozzle layer (4) comprises a plurality of upper nozzles (2) spaced apart along the horizontal direction; The first lower nozzle layer comprises a plurality of lower nozzles (3) spaced apart along the horizontal direction, the second lower nozzle layer (5) comprises a plurality of lower nozzles spaced apart along the horizontal direction, and the lower nozzles (3) of the first lower nozzle layer and the lower nozzles (3) of the second lower nozzle layer are staggered along the horizontal direction; The upper nozzles (2) of the upper nozzle layer (4) and the lower nozzles (3) of the first lower nozzle layer are staggered along the horizontal direction.

10. The liquid spraying structure for flue gas purification equipment according to claim 1, characterized in that: The upper nozzle layer (4) is provided as two layers, namely a first upper nozzle layer and a second upper nozzle layer; the lower nozzle layer (5) is provided as two layers, namely a first lower nozzle layer and a second lower nozzle layer; The first upper nozzle layer, the second upper nozzle layer, the first lower nozzle layer, and the second lower nozzle layer are arranged parallel to each other along the horizontal direction; The first upper nozzle layer, the second upper nozzle layer, the first lower nozzle layer and the second lower nozzle layer are arranged in sequence from top to bottom along the vertical direction; The first upper nozzle layer comprises a plurality of upper nozzles (2) spaced apart along the horizontal direction, the second upper nozzle layer comprises a plurality of upper nozzles (2) spaced apart along the horizontal direction, and the upper nozzles (2) of the first upper nozzle layer and the upper nozzles (2) of the second upper nozzle layer are staggered along the horizontal direction; The first lower nozzle layer comprises a plurality of lower nozzles (3) spaced apart along the horizontal direction, the second lower nozzle layer comprises a plurality of lower nozzles (3) spaced apart along the horizontal direction, and the lower nozzles (3) of the first lower nozzle layer and the lower nozzles (3) of the second lower nozzle layer are staggered along the horizontal direction; The upper nozzles (2) of the first upper nozzle layer and the lower nozzles (3) of the first lower nozzle layer are staggered along the horizontal direction.

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