Absorption tower filler stabilizing device for removing flue gas SO2 by seawater method and absorption tower

Abstract

The invention discloses an absorption tower filler stabilizing device for removing flue gas SO2 through a seawater method and an absorption tower, and relates to the technical field of absorption tower filler stabilizing devices. Comprising a supporting beam assembly arranged in an absorption tower shell, a supporting grating plate arranged above the supporting beam assembly, a filler layer arranged on the supporting grating plate and a stabilizing assembly located in the filler layer. The stabilizing assemblies are arranged above the supporting grating plate, are vertically connected with the supporting grating plate and are distributed in a regular or irregular grid shape; the stabilizing assembly is arranged in the absorption tower for removing SO2 in the flue gas by the seawater method, so that the stability of the filler in the tower is enhanced, fluid dynamics and flow field distribution in the tower are optimized, fluid is ensured to flow smoothly in a filler layer, the pressure drop and the system energy consumption are reduced, and the removal efficiency of harmful substances in the flue gas is improved; meanwhile, the deviation risk of the filler in the absorption tower due to impact or collision is reduced, friction between the filler and the wall of the absorption tower and friction between the filler and the wall of the absorption tower are reduced, and the service life of the filler is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of absorption tower packing stabilization devices, and more specifically to the technical field of absorption tower packing stabilization devices and absorption towers for removing SO2 from flue gas using a seawater method. Background Art

[0002] Efficient SO removal in coal-fired power plants 2 , CO 2 It is an important measure to promote the transformation of my country's energy structure and the development of green and low-carbon development. 2 The core of the mainstream capture technology is to use liquid absorbent to contact with gas to separate harmful components. 2 Absorption towers mainly include spray towers or packed towers. The further improvement of their absorption effect is mainly achieved by strengthening the gas-liquid mass transfer process. For example, patent CN220737014U proposes a high-efficiency seawater flue gas desulfurization absorption tower that combines the technical advantages of spray and packed towers. By arranging packing layers, porous plates and spray layers in the absorption tower from bottom to top, the seawater and flue gas are fully contacted, and the desulfurization efficiency is almost 100%. The packing layer is the core internal part and key place for gas-liquid two-phase contact in the absorption tower. Stable and uniform gas-liquid distribution in the packing layer is the key to achieve high efficiency and low energy consumption SO 2 The prerequisite for removal.

[0003] Traditional seawater method to remove SO from flue gas 2 In technology, random packing is widely used due to its advantages such as high degree of freedom, large specific surface, low pressure drop, large flux, easy cleaning, and low price and installation cost. However, in large-scale flue gas purification processes, random packing is generally supported only by supporting grid plates, and its application faces many challenges. Factors such as equipment vibration, changes in flue gas flow velocity and flow direction, and high flue gas particulate matter content can cause scouring and collision of the packing. In addition, changes in system temperature or pressure during the absorption process, improper installation and maintenance processes, and wear of the packing itself may cause the packing layer to shift, deviate, or even collapse or deform. These problems are not only prone to cause gas-liquid deviation and uneven flow field distribution, thereby reducing desulfurization efficiency, but may also cause equipment blockage or even damage due to the deposition of particulate impurities in the flue gas and seawater, increasing operating costs.

[0004] Therefore, developing a device that can effectively improve the stability of the filler in the absorption tower and optimize the flue gas flow path and flow velocity distribution is crucial to achieving high efficiency and low energy consumption of SO 2 Removal has important practical significance. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems in the prior art that the filler is easy to deviate during operation, the system operation stability and reliability are low, the pressure drop in the tower is large, the filler replacement and maintenance are difficult, and the operation cost is high. The present invention provides an absorption tower filler stabilization device and an absorption tower for removing SO2 from flue gas using seawater.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] One aspect of the present invention provides an absorption tower packing stabilization device for removing SO2 from flue gas using seawater, comprising a support beam assembly arranged inside an absorption tower shell, a support grid plate arranged above the support beam assembly, a packing layer arranged on the support grid plate, and a stabilization assembly located within the packing layer; the stabilization assembly is arranged above the support grid plate, is vertically connected to the support grid plate, and is distributed in a regular or irregular grid shape.

[0008] In one embodiment, a rigid support structure evenly distributed from bottom to top along the inner wall of the absorption tower shell is provided between the stabilizing assembly and the inner wall of the absorption tower shell, and the rigid support structure is connected to the stabilizing assembly by bolts in a typical clamping and fixing manner;

[0009] Between the stabilizing assembly and the supporting grid plate, a clamping and fixing device perpendicular to the plane of the supporting grid plate is arranged on the supporting grid plate, and the clamping and fixing device is connected to the bottom of the stabilizing assembly through bolts.

[0010] Specifically, the support provided by the stabilizing components of this solution comes from the following three parts:

[0011] A. The fillers on both sides of the stabilizing component play a certain supporting role;

[0012] B. Between the stabilizing component and the inner wall of the absorption tower shell, a rigid support structure is arranged on the inner wall of the absorption tower shell, which is evenly distributed from bottom to top along the inner wall of the absorption tower shell. The rigid support structure is connected to the stabilizing component by bolts in a typical clamping and fixing manner. The connection position can be adjusted appropriately (see Appendix). Figure 4 a);

[0013] C. Between the stabilizing assembly and the supporting grid plate, a clamping device perpendicular to the plane of the supporting grid plate is provided on the supporting grid plate (attached Figure 4 b), the clamping and fixing device is connected by bolts, and the connection position can be adjusted appropriately. The clamping and fixing device is composed of a clamping and fixing plate and a bolt connection. When the support grid plate height 2a = 20-60mm, the plate thickness c / 2 = 5-15mm, the stabilizing component thickness c = 10-30mm, the clamping and fixing plate height 2b = 100-200mm, and the clamping and fixing plate thickness d = 6-10mm.

[0014] In one embodiment, the stabilizing component includes a plurality of transverse partitions and a plurality of longitudinal partitions arranged in a crisscross pattern. The intersection of the transverse partition and the corresponding longitudinal partition is connected by a snap connection, and both ends of the transverse partition and each longitudinal partition are in contact with the inner sidewall of the absorption tower shell.

[0015] Specifically, this solution specifically introduces the first structure of the stabilizing component, which is a structure in which a plurality of transverse partitions and a plurality of longitudinal partitions are embedded.

[0016] In one embodiment, the materials of the transverse partition and the longitudinal partition are both one of polypropylene, fiberglass, or corrosion-resistant alloy.

[0017] Specifically, the transverse partition and the longitudinal partition are made of materials such as polypropylene, fiberglass, or corrosion-resistant alloy.

[0018] In one embodiment, the heights of the transverse partition and the longitudinal partition are both 2000 - 6000 mm; the interval between two adjacent transverse partitions is 2000 - 4000 mm, and the interval between two adjacent longitudinal partitions is 2000 - 4000 mm.

[0019] Specifically, the distribution positions of the transverse partition and the longitudinal partition can be appropriately adjusted, and the number of the transverse partition and the longitudinal partition can be appropriately adjusted according to the distance between them and the absorption tower shell, adjacent stabilizing partitions (transverse partition and longitudinal partition), the diameter of the absorption tower, the height of the packing layer, etc.

[0020] In one embodiment, a square manhole or a circular manhole is provided on one side of the stabilizing component close to the inner wall of the absorption tower shell.

[0021] Specifically, the stabilizing component is provided with a manhole, the manhole is semicircular or square, and the radius or height of the manhole is 800 - 1500 mm.

[0022] In one embodiment, the stabilizing component includes a number of stabilizing partition units with the same structure. The number of stabilizing partition units with the same structure is arranged in a rectangular array, and adjacent two stabilizing partition units are connected and fixed by bolts.

[0023] Specifically, for the second structure of the stabilizing component, the stabilizing component is composed of a number of "stabilizing partition units", and each stabilizing partition unit is connected and fixed by bolts to ensure that there is at least one bolt connection in the structure of each unit (attached Figure 3 )

[0024] In one embodiment, the form of the stabilizing component is a porous frame structure or a porous plate structure, and the porous frame structure is formed by connecting a number of regular polygon structures or irregular hole-shaped structures.

[0025] Specifically, the third structure of the stabilizing component, when the absorption tower adopts a random packing with a diameter (or length) of R, the stabilizing component can be in the form of a "porous frame structure" (i.e., it is composed of several regular (circular, rectangular, other polygonal, etc.) or irregular porous materials connected) (Appendix Figure 2 a) or "porous plate structure".

[0026] In one embodiment, the porous plate structure has an opening rate of 10%-70%, a pore size of 1 / 3R-2 / 3R, and R is the maximum particle size of the random packing.

[0027] Specifically, the porous plate structure is a plate-like material with a number of holes, the opening rate is 10%-70%, and the pore size is 1 / 3R-2 / 3R (see Appendix Figure 2 b).

[0028] The second aspect of the present invention provides an absorption tower, including the above-mentioned absorption tower packing stabilizer for removing SO2 from flue gas by seawater method, and also includes an absorption tower shell, a flue gas inlet arranged at the bottom of the absorption tower shell, and a flue gas outlet arranged at the bottom of the absorption tower shell. The packing stabilizer is located above the flue gas inlet, and a spray layer and a demister are also arranged in the absorption tower shell above the packing stabilizer.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The present invention removes SO from flue gas using seawater method 2 A stable baffle is set in the absorption tower to enhance the stability of the packing in the tower, optimize the fluid dynamics and flow field distribution in the tower, ensure smooth flow of the fluid in the packing layer, reduce pressure drop and system energy consumption, and improve the removal efficiency of harmful substances in the flue gas; at the same time, reduce the risk of packing displacement due to impact or collision in the absorption tower, reduce the friction between the packing and the absorption tower wall and each other, and extend the service life of the packing.

[0031] 2. This application sets a manhole on the stable partition to facilitate the maintenance and distribution adjustment of the tower filler, significantly improve the operational flexibility, safety and maintenance efficiency of the absorption tower, shorten downtime, improve equipment operation efficiency and reduce operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 are schematic diagrams of structures of stable components, wherein (a) is a schematic diagram of one structure of the stable component, and (b) is a schematic diagram of another structure of the stable component;

[0035] Figure 3 It is a typical connection diagram between packing stabilization partition units;

[0036] Figure 4 This is a typical clamping and fixing schematic diagram of the stabilizing assembly of the present application: (a) is between the two sides of the packing stabilizing partition and the rigid support structure of the inner wall of the absorption tower shell, and (b) is between the bottom of the packing stabilizing partition and the packing support grid plate;

[0037] Figure 5 yes Figure 1 Schematic diagram of the structure of the medium stabilizing component;

[0038] Figure numerals: 1 - flue gas inlet, 211 - support beam assembly, 212 - support grid plate, 213 - packing layer, 214 - stabilizing assembly, 22 - spray layer, 23 - demister, 3 - absorption tower shell, 4 - flue gas outlet. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and technical effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention 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 the present invention.

[0043] Example 1

[0044] like Figures 1 to 4 As shown, this embodiment provides an aspect of the present invention, which provides an absorption tower packing stabilization device for removing SO2 from flue gas by seawater method, including a support beam assembly 211 arranged inside the absorption tower shell 3, a support grid plate 212 arranged above the support beam assembly 211, a packing layer 213 arranged on the support grid plate 212, and a stabilization assembly 214 located in the packing layer 213; the stabilization assembly 214 is arranged above the support grid plate 212, is vertically connected to the support grid plate 212, and is distributed in a regular or irregular grid shape.

[0045] Example 2

[0046] like Figures 1 to 4 As shown, this embodiment provides an aspect of the present invention, which provides an absorption tower packing stabilization device for removing SO2 from flue gas by seawater method, including a support beam assembly 211 arranged inside the absorption tower shell 3, a support grid plate 212 arranged above the support beam assembly 211, a packing layer 213 arranged on the support grid plate 212, and a stabilization assembly 214 located in the packing layer 213; the stabilization assembly 214 is arranged above the support grid plate 212, is vertically connected to the support grid plate 212, and is distributed in a regular or irregular grid shape.

[0047] Between the stabilizing assembly 214 and the inner wall of the absorption tower shell 3, a rigid support structure is provided on the inner wall of the absorption tower shell 3 and is evenly distributed from bottom to top along the inner wall of the absorption tower shell 3. The rigid support structure is connected to the stabilizing assembly 214 by bolts in a typical clamping and fixing manner;

[0048] Between the stabilizing assembly 214 and the supporting grid plate 212 , a clamping and fixing device perpendicular to the plane of the supporting grid plate 212 is provided on the supporting grid plate 212 , and the clamping and fixing device is connected to the bottom of the stabilizing assembly 214 by bolts.

[0049] Specifically, the support provided by the stabilizing component 214 of the present solution comes from the following three parts:

[0050] A. The fillers on both sides of the stabilizing assembly 214 play a certain supporting role thereon;

[0051] B. Between the stabilizing assembly 214 and the inner wall of the absorption tower shell 3, a rigid support structure is arranged on the inner wall of the absorption tower shell 3, which is evenly distributed from bottom to top along the inner wall of the absorption tower shell 3. The rigid support structure is connected to the stabilizing assembly 214 by bolts in a typical clamping and fixing manner. The connection position can be adjusted appropriately (see Appendix). Figure 4 a);

[0052] C. Between the stabilizing assembly 214 and the supporting grid plate 212, a clamping and fixing device (attached) perpendicular to the plane of the supporting grid plate 212 is provided on the supporting grid plate 212. Figure 4 b), the clamping and fixing device is connected by bolts, and the connection position can be adjusted appropriately. The clamping and fixing device is composed of a clamping and fixing plate and a bolt connection. When the support grid plate 212 height 2a = 20-60mm, the plate thickness c / 2 = 5-15mm, the stabilizing component 214 thickness c = 10-30mm, the clamping and fixing plate height 2b = 100-200mm, and the clamping and fixing plate thickness d = 6-10mm.

[0053] Example 3

[0054] This embodiment is further optimized on the basis of embodiment 2, specifically:

[0055] The stabilizing assembly 214 includes a plurality of transverse partitions and a plurality of longitudinal partitions arranged in a criss-cross pattern. The transverse partitions are connected to the corresponding longitudinal partitions at their intersections by snap-fitting. Both ends of the transverse partitions and each longitudinal partition are in contact with the inner wall of the absorption tower shell 3.

[0056] Specifically, this solution specifically introduces the first structure of the stabilizing component 214, which is a structure in which multiple transverse partitions and multiple longitudinal partitions are inlaid.

[0057] Example 4

[0058] This embodiment is further optimized based on any one of Embodiments 1 to 3, specifically:

[0059] The transverse partition and the longitudinal partition are made of one of polypropylene, fiberglass or corrosion-resistant alloy.

[0060] Specifically, the transverse partition and the longitudinal partition are made of materials such as polypropylene, fiberglass or corrosion-resistant alloy.

[0061] The heights of the transverse partitions and the longitudinal partitions are both 2000-6000mm; the interval between two adjacent transverse partitions is 2000-4000mm, and the interval between two adjacent longitudinal partitions is 2000-4000mm.

[0062] Specifically, the distribution positions of the transverse partitions and the longitudinal partitions can be appropriately adjusted, and the number of the transverse partitions and the longitudinal partitions can be appropriately adjusted according to the distance between them and the absorption tower shell 3, the adjacent stable partitions (transverse partitions and longitudinal partitions), the absorption tower diameter, the height of the packing layer 213, etc.

[0063] Example 5

[0064] This embodiment is further optimized based on any one of Embodiments 1 to 4, specifically:

[0065] A square manhole or a circular manhole is provided on one side of the stabilizing component 214 close to the inner wall of the absorption tower shell 3 .

[0066] Specifically, the stabilizing component 214 is provided with a manhole, which is semicircular or square, and has a radius or height of 800-1500 mm.

[0067] The stabilizing assembly 214 includes a plurality of stabilizing baffle units with the same structure, which are arranged in a rectangular array, and two adjacent stabilizing baffle units are connected and fixed by bolts.

[0068] Specifically, the second structure of the stabilizing assembly 214 is composed of a plurality of "stabilizing baffle units", each of which is fixed by bolts to ensure that each unit structure has at least one bolt connection (see Appendix). Figure 3 ).

[0069] Example 6

[0070] This embodiment is further optimized based on any one of Embodiments 1 to 5, specifically:

[0071] The stabilizing component 214 is in the form of a porous frame structure or a porous plate structure, and the porous frame structure is formed by connecting a number of regular polygonal structures or irregular pore structures.

[0072] Specifically, the third structure of the stabilizing component 214, when the absorption tower adopts a random packing with a diameter (or length) of R, the stabilizing component 214 can be in the form of a "porous frame structure" (i.e., a plurality of regular (circular, rectangular, other polygonal, etc.) or irregular porous materials connected) (see Appendix Figure 2 a) or "porous plate structure".

[0073] The opening rate of the porous plate structure is 10%-70%, the pore size is 1 / 3R-2 / 3R, and R is the maximum particle size of the random packing.

[0074] Specifically, the porous plate structure is a plate-like material with a plurality of holes, the opening rate is 10%-70%, and the pore size is 1 / 3R-2 / 3R (see Appendix Figure 2 b).

[0075] Example 7

[0076] The present embodiment provides an absorption tower, including the above-mentioned absorption tower packing stabilization device for removing SO2 from flue gas by seawater method, and also includes an absorption tower shell, a flue gas inlet 1 arranged at the bottom of the absorption tower shell, and a flue gas outlet 4 arranged at the bottom of the absorption tower shell. The packing stabilization device is located above the flue gas inlet 1, and a spray layer 22 and a demister 23 are also arranged in the absorption tower shell above the packing stabilization device.

Claims

1. A packing stabilizing device for an absorption tower for removing SO2 from flue gas by seawater method, characterized in that: The invention comprises a support beam assembly (211) arranged inside an absorption tower shell (3), a support grid plate (212) arranged above the support beam assembly (211), a packing layer (213) arranged on the support grid plate (212), and a stabilizing assembly (214) located inside the packing layer (213); the stabilizing assembly (214) is arranged above the support grid plate (212), is vertically connected to the support grid plate (212), and is distributed in a regular or irregular grid shape.

2. The absorber packing stabilizing device for removing SO2 from flue gas by seawater method according to claim 1 is characterized in that: A rigid support structure is provided on the inner wall of the absorption tower shell (3) between the stabilizing component (214) and the inner wall of the absorption tower shell (3), and is evenly distributed from bottom to top along the inner wall of the absorption tower shell (3); the rigid support structure is connected to the stabilizing component (214) by bolts in a typical clamping and fixing manner; Between the stabilizing assembly (214) and the supporting grid plate (212), a clamping and fixing device perpendicular to the plane of the supporting grid plate (212) is provided on the supporting grid plate (212), and the clamping and fixing device is connected to the bottom of the stabilizing assembly (214) by bolts.

3. The packing stabilizing device for the absorption tower for removing SO2 from flue gas by seawater method according to claim 1 is characterized in that: The stabilizing assembly (214) comprises a plurality of transverse partitions and a plurality of longitudinal partitions arranged in a crisscross pattern, wherein the transverse partitions are connected to the corresponding longitudinal partitions at their intersections by means of a snap connection, and both ends of the transverse partitions and each of the longitudinal partitions are in contact with the inner side wall of the absorption tower shell (3).

4. The packing stabilizing device for the absorption tower for removing SO2 from flue gas by seawater method according to claim 3 is characterized in that: The transverse partition and the longitudinal partition are made of one of polypropylene, glass fiber reinforced plastics or corrosion-resistant alloy.

5. The packing stabilizing device for the absorption tower for removing SO2 from flue gas by seawater method according to claim 3 is characterized in that: The heights of the transverse partitions and the longitudinal partitions are both 2000-6000 mm; the interval between two adjacent transverse partitions is 2000-4000 mm, and the interval between two adjacent longitudinal partitions is 2000-4000 mm.

6. The absorber packing stabilization device for removing SO2 from flue gas by seawater method according to claim 1 is characterized in that: The stabilizing component (214) is provided with a square manhole or a circular manhole on one side close to the inner wall of the absorption tower shell (3).

7. The packing stabilizing device for the absorption tower for removing SO2 from flue gas by seawater method according to claim 1 is characterized in that: The stabilizing assembly (214) comprises a plurality of stabilizing baffle units with the same structure, the plurality of stabilizing baffle units with the same structure are arranged in a rectangular array, and two adjacent stabilizing baffle units are connected and fixed by bolts.

8. The absorber packing stabilization device for removing SO2 from flue gas by seawater method according to claim 1 is characterized in that: The stabilizing component (214) is in the form of a porous frame structure or a porous plate structure, and the porous frame structure is formed by connecting a number of regular polygonal structures or irregular pore structures.

9. The device for stabilizing the packing of an absorption tower for removing SO2 from flue gas by seawater method according to claim 8, characterized in that: The porous plate structure has an opening rate of 10%-70%, a pore size of 1 / 3R-2 / 3R, and R is the maximum particle size of the random packing.

10. An absorption tower, characterized in that: An absorption tower packing stabilization device for removing SO2 from flue gas by seawater method as claimed in any one of claims 1 to 9, further comprising an absorption tower shell, a flue gas inlet (1) arranged at the bottom of the absorption tower shell, and a flue gas outlet (4) arranged at the bottom of the absorption tower shell, wherein the packing stabilization device is located above the flue gas inlet (1), and a spray layer (22) and a demister (23) are also arranged in the absorption tower shell above the packing stabilization device.

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