Peripheral multi-column steel frame of washing and absorbing two-tower integrated structure

Abstract

The invention relates to the technical field of thermal power equipment, and discloses a peripheral multi-column steel frame of a washing and absorbing two-tower-in-one structure, which comprises a steel column inner frame, a steel column outer frame and a horizontal support structure: the steel column outer frame and the steel column inner frame are both of a square frame structure; the steel column inner frame and the steel column outer frame are each of a multi-layer frame structure, each layer of frame is formed by horizontally splicing multiple sections of steel beams, and the adjacent layers of frames are vertically connected through stand columns. The steel column inner frame is arranged on the outer side of the center tower in a surrounding mode, and the steel column outer frame is arranged on the outer side of the steel column inner frame in a surrounding mode. The steel column inner frame and the steel column outer frame are connected and fixed through a horizontal supporting structure. Each layer of filler in the central tower and the pipelines outside the tower transmit loads to the peripheral multi-column steel frame; the tower can be used for bearing the load transmitted by the central tower while realizing the integrated arrangement of the water washing tower and the absorption tower, can effectively reduce the wall thickness of the tower wall, reduces the occupied area, increases the height and capacity of the tower, reduces the construction cost, and can flexibly adjust the corresponding height.

Description

Technical Field

[0001] This invention relates to the field of thermal power equipment technology, and more specifically to a multi-column steel frame for a combined water washing and absorption tower structure. Background Technology

[0002] The descriptions in this section are intended only to provide background information for the implementation of this application and should not be construed as an admission or implication that they constitute prior art.

[0003] In carbon dioxide capture projects, the absorption tower is the core equipment for achieving carbon dioxide separation and capture, while the washing tower is a key auxiliary equipment to ensure the efficient operation of the absorption tower and improve the purity of the captured carbon dioxide. The two work together to ensure the accurate separation of high-purity carbon dioxide from industrial flue gas, while reducing system energy consumption and equipment corrosion risks. Currently, in the thermal power industry, absorption towers and washing towers are generally arranged independently, using traditional freestanding metal towers, such as... Figure 1 and Figure 2 As shown.

[0004] However, with economic development and increased attention to climate change, CCUS (carbon capture, utilization, and storage) has seen rapid development in existing thermal power plants. However, the overall layout of CCUS projects in existing thermal power plants is often constrained by site limitations, making it impossible to arrange the scrubbing tower and absorption tower separately as is customary. Combining the scrubbing / absorption tower into one unit results in a large tower volume, height, and heavy loads on the internal packing and piping, making the traditional freestanding metal tower unsuitable.

[0005] Specifically, traditional freestanding metal towers have several drawbacks: First, the independent arrangement of absorption towers and washing towers requires a large amount of space, increasing the project's land area and making it difficult to meet layout requirements when space is limited; second, the freestanding design of absorption towers and washing towers restricts their height, typically to within 50 meters, failing to meet the height and capacity requirements of large-scale CCUS projects; third, to ensure their load-bearing capacity, the freestanding design of absorption towers and washing towers requires thicker walls, increasing manufacturing costs; fourth, when absorption towers and washing towers are arranged independently, additional pipe supports are needed, further increasing project construction costs; and fifth, especially in cases with tall towers and multiple packing layers, there is a lack of external facilities that can flexibly adjust the height to share the load.

[0006] Therefore, a structural system is needed to solve the above problems, which can combine the water washing tower and absorption tower into one unit while reducing the floor space, increasing the tower height and capacity, reducing construction costs, and allowing for flexible height adjustments. This structural system includes an external multi-column steel frame that is compatible with the combined water washing and absorption tower structure and helps solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an external multi-column steel frame for a combined water washing and absorption tower structure, which can reduce the floor space, increase the tower height and capacity, reduce construction costs, and flexibly adjust the corresponding height while realizing the combined arrangement of water washing tower and absorption tower.

[0008] This application discloses a multi-column steel frame for a combined water washing and absorption tower structure, including an inner steel column frame, an outer steel column frame, and a horizontal support structure: Both the outer and inner frames of the steel columns are square frame structures with rectangular horizontal sections. Both the inner and outer frames are multi-layer frame structures, with each layer consisting of multiple horizontally spliced ​​steel beams. Adjacent layers are vertically connected by columns. Two adjacent steel beams and two adjacent columns form a grid, and some of the grids are equipped with fork-shaped support structures. The combined water washing and absorption tower structure is a central tower, which is located inside the outer multi-column steel frame. The inner steel column frame is set outside the central tower, and the outer steel column frame is set outside the inner steel column frame. The inner and outer steel column frames are connected and fixed by the horizontal support structure. The packing material in each layer of the central tower and the pipelines outside the tower transfer the load to the outer multi-column steel frame.

[0009] In a preferred embodiment, the transfer of loads from the packing layers within the central tower and the external piping to the peripheral multi-column steel frame further includes: The filling material of each layer of the central tower is supported by steel beams with extended internal components and mounted on the steel brackets of the inner frame of the steel column. The load generated by each layer of filling material is transferred to the inner frame of the steel column through the steel brackets.

[0010] In a preferred embodiment, the characteristic is that: Each section of the inner frame of the steel column extends towards the central tower and is provided with a steel bracket and a cover plate. The inner support steel beam is erected on the top surface of the steel bracket, and the cover plate is placed on the top surface of the inner support steel beam. The outer sides of the steel bracket and the inner support steel beam are provided with stiffening ribs in the vertical direction. Inside the column, stiffening partitions are provided at the top positions of the steel bracket and the corresponding installation positions of the cover plate.

[0011] In a preferred embodiment, the cover plate is provided with double nuts, which are used to enhance the reliability of the connection between the internal support steel beam and the cover plate.

[0012] In a preferred embodiment, the transfer of loads from the packing layers within the central tower and the external piping to the peripheral multi-column steel frame further includes: The external pipeline of the central tower is suspended on the outer multi-column steel frame, which is composed of the inner steel column frame, the outer steel column frame and the horizontal support structure. The pipeline load is directly applied to the outer multi-column steel frame.

[0013] In a preferred embodiment, the central tower is a cylindrical or cuboid structure; the height of each layer of the inner and outer steel column frames is consistent with the height of each layer of the central tower where the filling material is placed; and the height of the outer and inner steel column frames does not exceed the height of the central tower.

[0014] In a preferred embodiment, the horizontal distance between the inner frame of the steel column and the central tower is less than the horizontal distance between the outer frame of the steel column and the inner frame of the steel column.

[0015] In a preferred embodiment, the column bases of all steel columns in the inner and outer steel column frames are hinged; the steel beams in the inner and outer steel column frames are hinged to each other, the columns are hinged to each other, and the beams are hinged to each other.

[0016] In a preferred embodiment, the steel secondary beams in the horizontal support structure are all connected by hinges to each other and to the columns.

[0017] In a preferred embodiment, the horizontal support structure includes a steel secondary beam and a steel grating, one end of the steel secondary beam being connected to a node between two steel beams of the outer frame of the steel column, and the other end of the steel secondary beam being connected to a node between two steel beams of the inner frame of the steel column; and The steel grating is a mesh structure laid between a section of steel beam in the inner frame of the steel column, two adjacent sections of secondary steel beams, and a section of steel beam in the outer frame of the steel column.

[0018] In a preferred embodiment, the fork-shaped support structure is formed by the intersecting arrangement of two diagonal braces of a grid; and The fork-shaped support structures on the inner and outer frames of the steel columns are respectively provided.

[0019] In a preferred embodiment, the characteristic is that: The inner and outer frames of the steel columns are each provided with a single-row frame structure at the four corners. The squares in the single-row frame structure are all set as hollow structures. The single-row frame structure is composed of a section of steel beam and multiple sections of columns spliced ​​together on each floor. Furthermore, the inner and outer frames of the steel columns are also provided with single-column frame structures adjacent to the single-column frame structures at the four corners, and each of the squares in the adjacent single-column frame structures is provided with a fork-shaped support structure.

[0020] In a preferred embodiment, the inner and outer frames of the steel columns are each provided with eight columns of single-column frame structures with forked support structures, and each layer of the inner and outer frames of the steel columns is provided with eight squares with forked support structures.

[0021] The main differences and effects of the embodiments of the present invention compared with the prior art are as follows: An external multi-column steel frame is set around the metal tower of the combined water washing and absorption structure to bear the load of the packing and pipeline in each layer of the tower. This means that the load of the packing and pipeline in the tower does not need to be borne by the tower wall, which can effectively reduce the thickness of the tower wall, increase the height of the tower, and make the capacity of the tower no longer limited by the load-bearing capacity of the self-supporting tower wall.

[0022] Furthermore, the project land use is reduced: the water washing tower and absorption tower are designed as a single unit, which significantly reduces the space occupied by the equipment compared to the traditional independent layout, effectively solving the problem of limited space in existing thermal power plants.

[0023] Furthermore, the tower height and capacity are increased: the outer steel frame-central support structure bears the load of each layer of packing and piping within the tower, eliminating the need for the load to be borne by the tower wall. This effectively reduces the tower wall thickness and overcomes the height limitations of traditional self-supporting metal towers. The tower height can be increased according to project requirements, thereby increasing the tower capacity and meeting the processing requirements of large-scale projects. The densely packed design allows for adjustments to the vertical position of the packing layers as needed, offering flexible layout and making it more suitable for tower heights and multiple packing layers.

[0024] Furthermore, it reduces project investment: on the one hand, the reduction in tower wall thickness lowers the manufacturing cost of the equipment; on the other hand, the elimination of the need for additional pipe supports reduces related construction costs and achieves effective cost control.

[0025] It should be understood that, within the scope of this invention, the above-described technical features of this invention and the technical features specifically described below (such as in the embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, they will not be described in detail here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the side structure of a self-supporting metal tower.

[0028] Figure 2 This is a schematic diagram of the horizontal structure of a self-supporting metal tower.

[0029] Figure 3This is a top view of the combined water washing and absorption tower structure and the surrounding multi-column steel frame according to one embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the horizontal cross-section of a combined water washing and absorption tower structure with a corbel connection structure and an external multi-column steel frame, according to one embodiment of this application.

[0031] Figure 5 This is a side view of the connection structure between the internal support steel beam and the steel bracket according to one embodiment of this application.

[0032] Figure 6 This is a top view of the connection structure between the internal support steel beam and the steel bracket according to one embodiment of this application.

[0033] Figure 7 This is a three-dimensional structural diagram of the peripheral multi-column steel frame according to one embodiment of this application.

[0034] The labels in each of the attached figures are as follows: Central Tower; 101 - Internal support steel beam; 2-Inner frame of steel columns; 201 - Inner frame steel beam; 202-Steel Bracket; 203 - Cover plate; 204-Reinforced partition; 205 - Stiffening Rib; 206 - Double Nut; 3-Steel column outer frame; 301 - Outer frame steel beam; 302 - Outer frame column; 303 - Outer Frame Grid; 304 - Outer frame fork-shaped support structure; 4- Horizontal support structure; 401-Steel secondary beam. Detailed Implementation

[0035] In the following description, many technical details are presented to help the reader better understand this application. However, those skilled in the art will understand that the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0036] This invention features a central tower surrounded by two concentric rings of steel columns, with hinged column bases and forked support structures between beams and columns. All beam-column connections are hinged, forming an outer multi-column steel frame (also known as a multi-column steel frame-central support structure system, referring to a structure primarily composed of a steel frame and steel support components, capable of jointly bearing vertical and horizontal loads). The packing material within the tower is supported by extended internal steel beams 101 on the outer steel column brackets. External pipelines are suspended from the outer support structure system. This structural design, where the packing material is supported by internal steel beams 101 on steel brackets 202, and the pipeline load acts directly on the outer support structure system, effectively reduces the thickness of the internal metal tower walls, increases the tower's design height and capacity, and allows for flexible height adjustments.

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0038] One embodiment of this application relates to a multi-column steel frame surrounding a combined water washing and absorption tower structure, the top view of which is shown below. Figure 3 As shown, it includes an inner steel column frame 2, an outer steel column frame 3, and a horizontal support structure 4: Both the outer steel column frame 3 and the inner steel column frame 2 are square frame structures with rectangular horizontal sections. Both the inner steel column frame 2 and the outer steel column frame 3 are multi-layer frame structures. Each layer of the frame is composed of multiple steel beams horizontally spliced ​​together. Adjacent layers of the frame are vertically connected by columns, which is suitable for the multi-layer filling arrangement requirements of the central tower 1 and at the same time improves the overall deformation resistance of the frame. The two adjacent steel beams and the two adjacent columns form a grid. Some grids are equipped with fork-shaped support structures. The core function of the fork-shaped support structures is to enhance the horizontal stiffness and lateral displacement resistance of the frame, prevent the frame from undergoing horizontal deformation under load, and ensure that the inner and outer frames are coordinated in bearing force and have consistent stability. The combined structure of the two water washing and absorption towers is a central tower 1, which is located inside the outer multi-column steel frame. It mainly bears the load transmitted by the packing material inside the central tower 1, and at the same time plays a role in lateral limiting and protection of the central tower 1, preventing the central tower 1 from shifting due to uneven stress. The inner steel column frame 2 is set outside the central tower 1, and the outer steel column frame 3 is set outside the inner steel column frame 2. As an auxiliary support structure, it further disperses the load transmitted by the inner steel column frame 2, improves the load-bearing capacity and stability of the entire support system, and provides suspension support points for the pipeline outside the tower, optimizing the pipeline layout space. The inner frame 2 and the outer frame 3 of the steel column are connected and fixed by a horizontal support structure 4. The horizontal support structure 4 makes the inner frame 2 and the outer frame 3 of the steel column form an integral force-bearing system, realizing the uniform transfer of load between the inner and outer frames and avoiding the concentration of force on a single frame. The various layers of packing material inside the central tower 1 and the external pipelines transfer the load to the outer multi-column steel frame, which can effectively reduce the thickness of the internal metal tower wall, increase the tower design height, and increase the tower's own capacity.

[0039] The combined water-washing and absorption tower structure refers to a device that uses physical and chemical treatment methods to simultaneously remove sulfur dioxide (SO2) and solid dust particles from flue gas. The flue gas treatment process of this combined structure is as follows: Flue gas enters the lower part of the carbon dioxide absorption section from the top outlet of the alkaline washing section, where it comes into full contact with the composite amine solvent sprayed from top to bottom. Through gas-liquid mass transfer, more than 90% of the carbon dioxide in the flue gas is removed. The composite amine solvent, after absorbing carbon dioxide, is converted into a rich liquid and flows by gravity into the bottom of the absorption tower for further treatment. A two-stage washing section is installed at the top of the absorption tower. Its core function is to capture amine mist entrained in the flue gas, preventing amine mist loss and solvent depletion, while simultaneously condensing the moisture carried in the flue gas to maintain the water balance of the entire water-washing absorption system. The tail gas after the two-stage washing enters the water washing section for further water washing treatment to remove residual trace amounts of amine mist and impurities. The treated tail gas is then discharged through the steel chimney at the top of the absorption tower, meeting emission standards. The wash water from the washing section is collected in a storage tank, cooled by a wash liquid cooler, and then circulated to the absorption section for reuse, thus achieving the recycling of wash water resources and reducing operating costs. This multi-section structure requires a large amount of packing material. Therefore, a multi-column steel frame is needed to bear and transfer the load.

[0040] In one embodiment, such as Figure 4 As shown in the horizontal cross-section, the load transfer from the various layers of packing material within the central tower 1 and the external pipelines to the surrounding multi-column steel frame also includes: The filling material of each layer of the central tower 1 is supported by outwardly extending internal support steel beams 101, which are mounted on steel brackets 202 of the inner frame of the steel columns 2. The steel brackets 202 are load-bearing components, providing stable support points. The loads generated by each layer of filling material are transferred to the inner frame of the steel columns 2 through the steel brackets 202. This application features a flexible layout and non-fixed floor height. Due to the dense arrangement of the columns and the connection of the filling material layers through brackets, the vertical position of the filling material layers can be adjusted later as needed.

[0041] For ease of labeling in the attached diagram (reference) Figure 4 and Figure 7 Based on the distinction between the inner frame 2 and the outer frame 3 of the steel column, the steel beams are respectively set as inner frame steel beam 201 and outer frame steel beam 301, the columns are divided into inner frame columns (not shown in the figure) and outer frame columns 302, the grid is divided into inner frame grid (not shown in the figure) and outer frame grid 303, and the fork-shaped support structure is divided into inner frame fork-shaped support structure (not shown in the figure) and outer frame fork-shaped support structure 304. In one embodiment, such as Figure 5 As shown, the feature is: Each section of the inner frame 2 of the steel column extends towards the central tower 1 and is equipped with a steel bracket 202 and a cover plate 203. The internal support steel beam 101 is erected on the top surface of the steel bracket 202, and the cover plate 203 is placed on the top surface of the internal support steel beam 101. The cover plate 203 provides cover and protection and strengthens the position fixation of the internal support steel beam 101. The outer sides of the steel bracket 202 and the internal support steel beam 101 are provided with stiffening ribs 205 in the vertical direction to enhance the local stiffness and buckling resistance of the steel bracket 202 and the internal support steel beam 101, and to prevent local deformation and fracture under load, thus ensuring the reliability of load transfer. Inside the column, corresponding to the top position of the steel bracket 202 and the installation position of the cover plate 203, stiffening baffles 204 are provided. The function of the stiffening baffles 204 is to enhance the local stress performance of the column and prevent local deformation. The bottom of the internal support steel beam 101 and the contact surface of the steel bracket 202 are respectively provided with a 5mm PTFE surface layer.

[0042] In one embodiment, such as Figure 6 As shown, the cover plate 203 is provided with stiffening ribs 205, which are used to enhance the reliability of the connection between the internal support steel beam 101 and the cover plate 203. The stiffening ribs 205 are equipped with ordinary C-grade bolts, and elliptical holes are opened at corresponding positions.

[0043] In one embodiment, the transfer of loads from the packing layers within the central tower 1 and the external pipelines to the surrounding multi-column steel frame also includes: The external pipeline of the central tower 1 is suspended on the outer multi-column steel frame consisting of the inner steel column frame 2, the outer steel column frame 3, and the horizontal support structure 4. The pipeline load is directly applied to the outer multi-column steel frame, avoiding the pipeline load from being directly applied to the central tower 1 and reducing the stress on the central tower 1.

[0044] In one embodiment, the central tower 1 is a cylindrical or cuboid structure; the height of each layer of the inner steel frame 2 and the outer steel frame 3 is consistent with the height of each layer of the central tower 1 where the filling material is placed; the height of the outer steel frame 3 and the inner steel frame 2 does not exceed the height of the central tower 1.

[0045] In one embodiment, the horizontal distance between the inner frame 2 of the steel column and the central tower 1 is less than the horizontal distance between the outer frame 3 of the steel column and the inner frame 2 of the steel column.

[0046] In one embodiment, the column bases of all steel columns in the inner steel column frame 2 and the outer steel column frame 3 are hinged; the steel beams in the inner steel column frame 2 and the outer steel column frame 3 are hinged to each other, the columns are hinged to each other, and the steel beams are hinged to each other.

[0047] In one embodiment, the secondary steel beams 401 in the horizontal support structure 4 are hinged to each other and to the columns. Hinged connections allow for relative rotation between components, preventing moment concentration that could damage them. They also adapt to the stress characteristics of the frame structure, improving the overall deformation resistance and service life of the frame structure.

[0048] In one embodiment, the horizontal support structure 4 includes a steel secondary beam 401 and a steel grating 402. One end of the steel secondary beam 401 is connected to the node between two steel beams of the outer frame 3 of the steel column, and the other end of the steel secondary beam 401 is connected to the node between two steel beams of the inner frame 2 of the steel column. The steel grating 402 is a mesh structure laid between a section of steel beam in the inner frame 2 of the steel column, two adjacent sections of secondary steel beams 401, and a section of steel beam in the outer frame 3 of the steel column. Its function is to enhance the overall rigidity of the horizontal support structure 4, and it can also serve as the foundation for the maintenance platform, facilitating the maintenance and repair of equipment by staff, thus combining support and practical functions.

[0049] In one embodiment, the fork-shaped support structure is formed by the intersecting arrangement of two diagonal braces of the grid, fully utilizing the shear and tensile properties of the braces to effectively enhance the stiffness and lateral displacement resistance of the grid, thereby improving the stability of the entire frame; and The fork-shaped support structures on the inner frame 2 and the outer frame 3 of the steel column are set accordingly to ensure that the stiffness distribution of the inner frame and the outer frame is uniform and to achieve the coordinated force bearing of the two.

[0050] In one embodiment, such as Figure 7 As shown, the feature is: The inner frame 2 and the outer frame 3 of the steel column are each provided with a single-row frame structure at the four corners. The squares in the single-row frame structure are all set as hollow structures. The single-row frame structure is composed of a section of steel beam and multiple sections of columns spliced ​​together on each floor. Furthermore, both the inner frame 2 and outer frame 3 of the steel columns contain adjacent single-column frame structures to the single-column frame structures at the four corners. Each square within the adjacent single-column frame structure is equipped with a fork-shaped support structure. Combined with... Figure 3 It can be seen that the squares in the single-column frame structure where the magenta steel beams are located in the outer multi-column steel frame are equipped with fork-shaped support structures, while the squares in the single-column frame structure where the other green steel beams are located are set with hollow structures.

[0051] On the facade, dense forked support structures are installed on the inner steel column frame 2 and the outer steel column frame 3. Their main function is to transfer horizontal forces and increase the overall stability of the structure. The arrangement of the supports (such as setting two symmetrical forked support structures on each side) is not fixed. In actual projects, the position and number can be flexibly adjusted according to factors such as pipeline layout. However, in principle, the supports of the inner and outer frames should be set accordingly.

[0052] In one embodiment, the inner frame 2 and the outer frame 3 of the steel column are each provided with eight columns of single-column frame structures with fork-shaped support structures, and each layer of the inner frame 2 and the outer frame 3 of the steel column is provided with eight squares with fork-shaped support structures.

[0053] The single-column frame structures at the four corners can be used to install elevators and other structures to facilitate personnel movement. The function of the adjacent single-column frame structures is to ensure the stress stability and balance of the frame edges, avoid local stiffness deficiency, reduce stiffness loss, and further improve the stability and reliability of the outer multi-column steel frame.

[0054] Example 1: The combined water scrubbing / absorption tower system consists of a central tower 1 and an external multi-column steel frame with a central support structure. The central tower 1 has a cubic structure and is used to simultaneously remove sulfur dioxide (SO2) and solid dust particles from the flue gas.

[0055] This steel frame adopts a steel frame-central bracing structure system. The main materials are Q355 steel (beams and columns) and Q235 steel (bracing). The total height is 94.8m, with 7 floors. The height of each floor is precisely matched with the height of the filling material in each floor of the central tower 1, which can achieve precise transfer of the filling load. The total mass of the frame is 8218.677t, of which the dead load mass is 6177.476t (including the self-weight of the structure, the filling material and equipment in the central tower 1), and the live load mass is 2041.201t (including maintenance load and additional pipeline load). The load-bearing capacity meets the design requirements, and the transfer path of the filling load through the internal supporting steel beams 101, steel brackets 202, inner steel column frame 2, horizontal support structure 4 to outer steel column frame 3 and foundation is clear, with no stress concentration or local overload. Regarding structural stiffness and stability, the first periods are T1 = 2.476s (Y-direction translation), T2 = 2.215s (X-direction translation), and T3 = 1.667s (torsional), with a period ratio of 0.67 < 0.9, and the sum of modal masses participating in the vibration reaches over 90%. The maximum inter-story drift angle in the X-direction is 1 / 959, and in the Y-direction it is 1 / 899, both less than the steel structure limit of 1 / 250. The minimum shear-weight ratio in the X-direction is 2.31%, and in the Y-direction it is 2.59%, meeting the requirements for a seismic intensity zone of 7 degrees. The stiffness-to-weight ratio is 3.737 in the X-direction and 3 in the Y-direction. The stress coefficient .077 > 0.7, meeting the overall stability requirements; the zero-stress zone under seismic loading is 0%, meeting the overturning resistance requirements; the forked support structure and horizontal support structure 4 can effectively improve the horizontal stiffness and lateral displacement resistance of the frame; the slenderness ratio and width-to-thickness ratio of the steel columns, steel beams, and support members meet the requirements of the "Steel Structure Design Standard" (GB50017-2017); the installation of steel bracket 202, stiffening rib 205, and stiffening diaphragm 204 can increase the local stiffness of steel bracket 202 by more than 30%, with no risk of local instability. The reliability of key nodes and connections has been verified by calculation; the hinged connections at the column bases and various component connections can effectively release bending moments, avoid bending moment concentration, and smoothly transfer loads without the risk of loosening. Wind load and seismic loading verification shows that the frame is designed according to GB50009-2012, with a corrected basic wind pressure of 0.40 kN / m. 2 Under wind load, the maximum inter-story drift angles in the X and Y directions meet the requirements for comfort and stability. Under the conditions of seismic intensity 7 degrees (0.1g), bidirectional seismic action and accidental eccentricity, the seismic shear force distribution in each story is uniform, and the seismic internal force in the weak story still meets the requirements for seismic bearing capacity after amplification, which can ensure the long-term safe operation of the equipment.

[0056] The packing material in each layer of the central tower 1 is supported by extended internal components on the steel brackets 202 of the steel columns. The pipes outside the central tower 1 are suspended from the outer multi-column steel frame. Fork-shaped support structures are set on the facade, with corresponding fork-shaped support structures on the inner and outer rings. Based on the pipe layout of this project, two symmetrical fork-shaped support structures are set on each face and each layer to ensure that the structure can effectively transmit horizontal forces and increase the overall stability of the structure.

[0057] It should be noted that in the claims and description of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, meaning that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] All documents mentioned in this invention are incorporated herein by reference as if each document were individually incorporated by reference. Furthermore, it should be understood that after reading the foregoing teachings of this invention, those skilled in the art can make various alterations or modifications to this invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A multi-column steel frame for a combined water washing and absorption tower structure, characterized in that, Includes the inner steel column frame, the outer steel column frame, and the horizontal support structure: Both the outer and inner frames of the steel columns are square frame structures with rectangular horizontal sections. Both the inner and outer frames are multi-layer frame structures, with each layer consisting of multiple horizontally spliced ​​steel beams. Adjacent layers are vertically connected by columns. Two adjacent steel beams and two adjacent columns form a grid, and some of the grids are equipped with fork-shaped support structures. The combined water washing and absorption tower structure is a central tower, which is located inside the outer multi-column steel frame. The inner steel column frame is set outside the central tower, and the outer steel column frame is set outside the inner steel column frame. The inner and outer steel column frames are connected and fixed by the horizontal support structure. The packing material in each layer of the central tower and the pipelines outside the tower transfer the load to the outer multi-column steel frame.

2. The multi-column steel frame as described in claim 1, characterized in that, The transfer of loads from the various layers of packing material within the central tower and the external pipelines to the surrounding multi-column steel frame also includes: The filling material of each layer of the central tower is supported by steel beams with extended internal components and mounted on the steel brackets of the inner frame of the steel column. The load generated by each layer of filling material is transferred to the inner frame of the steel column through the steel brackets.

3. The multi-column steel frame as described in claim 2, characterized in that: Each section of the inner frame of the steel column extends towards the central tower and is provided with a steel bracket and a cover plate. The inner support steel beam is erected on the top surface of the steel bracket, and the cover plate is placed on the top surface of the inner support steel beam. The outer sides of the steel bracket and the inner support steel beam are provided with stiffening ribs in the vertical direction. Inside the column, stiffening partitions are provided at the top positions of the steel bracket and the corresponding installation positions of the cover plate.

4. The external multi-column steel frame as described in claim 1, characterized in that, The transfer of loads from the various layers of packing material within the central tower and the external pipelines to the surrounding multi-column steel frame also includes: The external pipeline of the central tower is suspended on the outer multi-column steel frame, which is composed of the inner steel column frame, the outer steel column frame and the horizontal support structure. The pipeline load is directly applied to the outer multi-column steel frame.

5. The multi-column steel frame as described in claim 1, characterized in that, The central tower is a cylindrical or cuboid structure; the height of each layer of the inner and outer steel column frames is consistent with the height of each layer of the central tower where the filling material is placed; the height of the outer and inner steel column frames does not exceed the height of the central tower.

6. The external multi-column steel frame as described in claim 1, characterized in that, All column bases of the inner and outer steel columns are hinged; the steel beams, columns, and beams within the inner and outer steel columns are also hinged.

7. The external multi-column steel frame as described in claim 1, characterized in that, The horizontal support structure includes a steel secondary beam and a steel grid. One end of the steel secondary beam is connected to the node between two steel beams of the outer frame of the steel column, and the other end of the steel secondary beam is connected to the node between two steel beams of the inner frame of the steel column. and The steel grating is a mesh structure laid between a section of steel beam in the inner frame of the steel column, two adjacent sections of secondary steel beams, and a section of steel beam in the outer frame of the steel column.

8. The multi-column steel frame as described in claim 1, characterized in that, The fork-shaped support structure is formed by two diagonal braces arranged in a grid pattern; and The fork-shaped support structures on the inner and outer frames of the steel columns are respectively provided.

9. The multi-column steel frame as described in claim 8, characterized in that: The inner and outer frames of the steel columns are each provided with a single-row frame structure at the four corners. The squares in the single-row frame structure are all set as hollow structures. The single-row frame structure is composed of a section of steel beam and multiple sections of columns spliced ​​together on each floor. Furthermore, the inner and outer frames of the steel columns are also provided with single-column frame structures adjacent to the single-column frame structures at the four corners, and each of the squares in the adjacent single-column frame structures is provided with a fork-shaped support structure.

10. The multi-column steel frame as described in claim 9, characterized in that, The inner and outer frames of the steel columns are each provided with eight columns of single-column frame structures with fork-shaped support structures, and each layer of the inner and outer frames of the steel columns is provided with eight squares with fork-shaped support structures.

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