Two-truss support structure suitable for supporting large-span clean flue

Abstract

The utility model discloses a two-truss support structure suitable for supporting a large-span clean flue, and relates to the technical field of flue gas purification. The device comprises a flue support arranged at the bottom of a clean flue, the left end of the clean flue is connected with an absorption tower, and the right end of the clean flue is connected with a chimney; the flue bracket comprises a first bracket and a second bracket; the first bracket comprises a first bracket steel column and a second bracket steel column which are arranged at an interval; the second support comprises a third support steel column, a fourth support steel column, a fifth support steel column and a sixth support steel column which are arranged at intervals. In order to overcome the defects of large occupied area, high cost, long construction period and the like due to the adoption of a multi-span concrete or steel structure bracket in the conventional design of a large-span and high-clearance clean flue bracket in a desulfurization system, the utility model provides a two-truss bracket structure for supporting a clean flue of a desulfurization system. The device has the advantages of small occupied area, good economical efficiency and convenience in construction.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas purification technical field, more specifically it is a two frame support structure suitable for large span clean flue support. BACKGROUND

[0002] Limestone-gypsum wet flue gas desulfurization technology is the mainstream technology of desulfurization technology in China's thermal power plant, usually two sets of absorption tower are arranged along the chimney two sides in "one character type" symmetry, at the same time for saving the land area of desulfurization system, usually absorption tower circulating pump house is arranged between absorption tower and chimney close to the side of absorption tower, taking the 2x1000MW unit of a power plant as an example, absorption tower diameter is 21m, the center distance of tower is 55.4m from chimney center line, net flue gas is connected from absorption tower to chimney by clean flue, the center elevation of clean flue is 50.4m, in addition to the weight of flue, the weight of heat preservation and corrosion of flue, flue support is essential for large span clean flue, considering wind load, seismic load, flue internal gas pressure and other factors.

[0003] The conventional flue support design usually arranges multiple span concrete or steel structure supports between tower outlet and chimney, resulting in that the construction cost of clean flue support in the civil part of desulfurization system is higher, and the land area is large, which can not meet the arrangement requirement of circulating pump house between tower outlet and chimney.

[0004] Therefore, for the actual requirement of large span, high net space clean flue and the arrangement of circulating pump house and other buildings at the bottom of clean flue, it is necessary to develop a kind of clean flue support structure with optimized flue support arrangement form, reduced flue support arrangement quantity, structure strength meeting specification requirement, small land area and low construction cost. INVENTION CONTENTS

[0005] The utility model discloses a kind of two frame support structures suitable for large span clean flue support, to overcome the defect of desulfurization system clean flue support in long span, high net space and ground space limited condition using multiple span concrete or steel structure support.

[0006] To achieve the above object, the technical scheme of the utility model is as follows: a kind of two frame support structures suitable for large span clean flue support, it is characterized by: including flue support, the flue support is arranged at the bottom of clean flue, the left end of the clean flue is connected with absorption tower, and the right end is connected with chimney;

[0007] The flue support includes first support and second support, first support is located at the left side of second support, circulating pump house is arranged at the left side of first support;

[0008] The first support comprises first and second support steel columns arranged at intervals; the second support comprises third, fourth, fifth and sixth support steel columns arranged at intervals;

[0009] First support intermediate beams are arranged at intervals between the first and second support steel columns and between the fourth and fifth support steel columns; second support intermediate beams are arranged at intervals between the third and fourth support steel columns and between the fifth and sixth support steel columns; third support intermediate beams are arranged at intervals between the first and fourth support steel columns and between the second and fifth support steel columns;

[0010] Supporting diagonal braces are arranged between adjacent first support intermediate beams, between adjacent second support intermediate beams and between adjacent third support intermediate beams.

[0011] In the above technical solution, the first, second, third, fourth, fifth and sixth support steel columns are mounted at the bottom of the concrete foundation, and fine stone concrete is poured inside the first, second, third, fourth, fifth and sixth support steel columns above the concrete foundation.

[0012] In the above technical solution, support top face beams are arranged between the top of the first support steel column and the top of the second support steel column, between the top of the fourth support steel column and the top of the fifth support steel column, between the top of the first support steel column and the top of the fourth support steel column, and between the top of the second support steel column and the top of the fifth support steel column.

[0013] The support top face beams are connected to the bottom of the clean flue through clean flue limiting supports.

[0014] In the above technical solution, the clean flue is internally provided with a clean flue triangular inner support.

[0015] In the above technical solution, the middle of the first support intermediate beam of the lower layer is connected to the two ends of the first support intermediate beam of the upper layer through first support diagonal braces; the first support diagonal braces are in a diamond shape.

[0016] In the above technical solution, the height of the third support steel column and the sixth support steel column is lower than the height of the fourth support steel column and the fifth support steel column.

[0017] The height of every two layers of second support intermediate beams is equal to the height of three layers of first support intermediate beams; the end of the second support intermediate beam of the lower layer away from the first support intermediate beam is connected to the end of the second support intermediate beam of the upper layer close to the first support intermediate beam through a second support diagonal brace, and the second support diagonal braces are in a zigzag shape.

[0018] In the above technical solution, the top of the third support steel column is connected with the first support intermediate beam at the corresponding middle layer of the fourth support steel column through the second support diagonal brace; and the top of the sixth support steel column is connected with the first support intermediate beam at the corresponding middle layer of the fifth support steel column through the second support diagonal brace.

[0019] In the above technical solution, the middle part of the first layer third support intermediate beam is connected with the both ends of the second layer third support intermediate beam through the third support diagonal brace, and the rest of the third support intermediate beams are connected through the fourth support diagonal brace.

[0020] In the above technical solution, the middle part of the first layer third support intermediate beam is connected with the both ends of the second layer third support intermediate beam through the third support diagonal brace, and the rest of the third support intermediate beams are connected through the fourth support diagonal brace.

[0021] The far end of the first support intermediate beam of the second support intermediate beam of the lowest layer is connected with the fourth support steel column bottom and the fifth support steel column bottom through the sixth support diagonal brace.

[0022] The middle part of the third support intermediate beam of the lowest layer is connected with the first support steel column bottom and the fourth support steel column bottom, and the second support steel column bottom and the fifth support steel column bottom through the seventh support diagonal brace.

[0023] In the above technical solution, the first support steel column, the second support steel column, the third support steel column, the fourth support steel column, the fifth support steel column, the sixth support steel column, the first support intermediate beam, the second support intermediate beam, the third support intermediate beam and the support diagonal brace adopt a circular pipe, and the flue gas passageway limiting support adopts an H-shaped steel.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1) In order to solve the problems of large land occupation, high cost, long construction period and the like in the conventional design of the large-span, high-clearance flue gas passageway support in the desulfurization system, the utility model provides a two-truss support structure for the flue gas passageway support of the desulfurization system, which has the advantages of small land occupation, good economy and convenient construction under the premise that the structural strength meets the specification requirements.

[0026] 2) The utility model is based on the overall analysis of the absorption tower and the flue gas passageway outlet of the absorption tower, and for the areas with large seismic intensity or large wind load, the utility model coordinates the overall force transmission system among the absorption tower, the flue gas passageway outlet of the absorption tower and the flue gas passageway support, avoids the calculation deviation existing in the independent design of the three, and has a higher safety factor of the flue gas passageway support structure.

[0027] 3) Compared with the conventional multi-span support structure, the utility model discloses, through enhancing the rigidity of the flue section at the outlet of the absorption tower (setting the net flue triangular inner support inside the net flue), using the outlet structure of the absorption tower as the end support of the flue, the number of flue supports can be effectively reduced to two sets of supports, the investment cost of the flue support is reduced, the land occupation area of the flue support is effectively reduced, and effective space is provided for arranging the circulating pump house between the absorption tower and the chimney, so that the desulfurization system is more compact and simple.

[0028] 4) The utility model discloses two sets of support design, reduce the land occupation area, it is convenient for arranging the absorption tower circulating pump house between the absorption tower and the chimney, and the steel consumption of the support is reduced, and the investment cost is reduced.

[0029] 5) The utility model discloses that the support steel column bottom is installed in the concrete foundation, and the inside fine stone concrete of support steel column is poured to above the concrete foundation, and is used for improving the anti-inclination ability of the whole flue support.

[0030] 6) The utility model discloses arranging two sections (A axis, B axis) along the x direction, four sections (① axis, ② axis, ③ axis, ④ axis) along the z direction, wherein, 2 support steel columns are arranged in the A axis section, 4 support steel columns are arranged in the B axis section, under the premise of guaranteeing structural strength, the lateral displacement of the support top under the action of wind load and earthquake load in x, z two directions is reduced, and the maximum displacement and support height ratio are satisfied 1 / 250. DRAWINGS

[0031] Figure 1 It is the installation schematic drawing of the utility model.

[0032] Figure 2 It is Figure 1 The middle flue support A axis arrangement drawing.

[0033] Figure 3 It is Figure 1 The middle flue support B axis arrangement drawing.

[0034] Figure 4 It is the connection arrangement drawing of the flue support A-B axis section.

[0035] Figure 5 It is the installation schematic drawing of the concrete foundation.

[0036] Figure 6 It is the installation schematic drawing of the net flue limiting support and net flue triangular inner support.

[0037] Figure 7 It is the structural schematic drawing of the flue support.

[0038] Figure 8 It is the structural calculation drawing of the flue support.

[0039] Wherein, 100 - flue support, 110 - first support, 111 - first support steel column, 112 - second support steel column, 120 - second support, 121 - third support steel column, 122 - fourth support steel column, 123 - fifth support steel column, 124 - sixth support steel column, 131 - first support intermediate beam, 132 - second support intermediate beam, 133 - third support intermediate beam, 134 - support top beam, 135 - fourth support intermediate beam, 140 - support diagonal brace, 141 - first support diagonal brace, 142 - second support diagonal brace, 143 - third support diagonal brace, 144 - fourth support diagonal brace, 145 - fifth support diagonal brace, 146 - sixth support diagonal brace, 147 - seventh support diagonal brace, 210 - clean flue, 220 - absorption tower connection, 230 - chimney, 240 - circulating pump house, 250 - absorption tower inlet flue, 300 - concrete foundation, 310 - fine stone concrete, 320 - embedded anchor bolt, 400 - clean flue limiting support, 500 - clean flue triangular internal support. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below with reference to the drawings, but they do not constitute a limitation on the present application, but only serve as an example. At the same time, through the description, the advantages of the present application will become clearer and easier to understand.

[0041] As shown in Figure 1 A two-frame support structure suitable for large-span clean flue support, comprising a flue support 100, the flue support 100 is arranged at the bottom of the clean flue 210, the left end of the clean flue 210 is connected with the absorption tower 220, and the right end is connected with the chimney 230.

[0042] The flue support 100 comprises a first support 110 and a second support 120, the first support 110 is located on the left side of the second support 120, and the circulating pump house 240 is arranged on the left side of the first support 110.

[0043] As shown in Figure 2 and Figure 3 The first support 110 comprises first support steel columns 111 and second support steel columns 112 arranged at intervals; the second support 120 comprises third support steel columns 121, fourth support steel columns 122, fifth support steel columns 123 and sixth support steel columns 124 arranged at intervals.

[0044] As shown in Figure 2 , Figure 3 , Figure 4The first support steel column 111 and the second support steel column 112, the fourth support steel column 122 and the fifth support steel column 123 are provided with the first support intermediate beam 131 at intervals.

[0045] The first support intermediate beam 131, the second support intermediate beam 132 and the third support intermediate beam 133 are provided with the support inclined brace 140 at intervals.

[0046] As shown in Figure 5 The first support steel column 111, the second support steel column 112, the third support steel column 121, the fourth support steel column 122, the fifth support steel column 123 and the sixth support steel column 124 are installed at the bottom of the concrete foundation 300, and the fine stone concrete 310 is poured inside the first support steel column 111, the second support steel column 112, the third support steel column 121, the fourth support steel column 122, the fifth support steel column 123 and the sixth support steel column 124 to above the concrete foundation 300.

[0047] The first support steel column 111 and the second support steel column 112, the fourth support steel column 122 and the fifth support steel column 123, the first support steel column 111 and the fourth support steel column 122, and the second support steel column 112 and the fifth support steel column 123 are provided with the support top beam 134.

[0048] As shown in Figure 6 The support top beam 134 is connected with the bottom of the clean flue 210 through the clean flue limiting support 400.

[0049] As shown in Figure 6 The clean flue 210 is provided with the clean flue triangular inner support 500.

[0050] The middle of the first support intermediate beam 131 of the lower layer and the two ends of the first support intermediate beam 131 of the upper layer are connected through the first support inclined brace 141, and the plurality of first support inclined braces 141 are rhombic.

[0051] The height of the third support steel column 121 and the sixth support steel column 124 is lower than the height of the fourth support steel column 122 and the fifth support steel column 123.

[0052] The height of the second support intermediate beam 132 in each two layers is equal to the height of the first support intermediate beam 131 in three layers; the end of the second support intermediate beam 132 in the lower layer, which is away from the first support intermediate beam 131, is connected with the end of the second support intermediate beam 132 in the upper layer, which is close to the first support intermediate beam 131, through the second support inclined brace 142, and the plurality of second support inclined braces 142 are in a zigzag shape.

[0053] The top of the third support steel column 121 is connected with the first support intermediate beam 131 in the corresponding middle layer of the fourth support steel column 122 through the second support inclined brace 142; the top of the sixth support steel column 124 is connected with the first support intermediate beam 131 in the corresponding middle layer of the fifth support steel column 123 through the second support inclined brace 142; and the second support inclined braces 142 are connected in a zigzag shape.

[0054] The middle of the first layer of third support intermediate beams 133 is connected with the two ends of the second layer of third support intermediate beams 133 through the third support inclined brace 143, and the rest of the third support intermediate beams 133 are connected through the fourth support inclined brace 144; and the fourth support inclined braces 144 are connected in a zigzag shape.

[0055] The middle of the first support intermediate beam 131 in the lowest layer is connected between the bottom of the first support steel column 111 and the bottom of the second support steel column 112, the bottom of the fourth support steel column 122 and the bottom of the fifth support steel column 123 through the fifth support inclined brace 145;

[0056] The end of the second support intermediate beam 132 in the lowest layer, which is away from the first support intermediate beam 131, is connected between the bottom of the fourth support steel column 122 and the bottom of the fifth support steel column 123 through the sixth support inclined brace 146;

[0057] The middle of the third support intermediate beam 133 in the lowest layer is connected with the bottom of the first support steel column 111 and the bottom of the fourth support steel column 122, and the bottom of the second support steel column 112 and the bottom of the fifth support steel column 123 through the seventh support inclined brace 147.

[0058] The first support steel column 111, the second support steel column 112, the third support steel column 121, the fourth support steel column 122, the fifth support steel column 123, the sixth support steel column 124, the first support intermediate beam 131, the second support intermediate beam 132, the third support intermediate beam 133 and the support inclined brace 140 adopt a circular pipe, and the net flue limiting support 400 adopts an H-shaped steel; the corresponding specifications are selected according to the strength calculation results.

[0059] In actual use, the utility model adopts a two-frame support design, reduces the occupied area, and facilitates the arrangement of a circulating pump house 240 between the absorption tower 220 and the chimney 230; meanwhile, the consumption of support steel is reduced, and the investment cost is reduced;

[0060] The bottom of the first support steel column 111, the second support steel column 112, the third support steel column 121, the fourth support steel column 122, the fifth support steel column 123, and the sixth support steel column 124 are all equipped with pre-embedded anchor bolts 320.

[0061] like Figure 7 As shown, based on the overall analysis approach of the absorption tower 220, the clean flue 210, and the flue support 100, and taking into account the weight of the clean flue 210, the weight of the insulation and corrosion protection of the clean flue 210, the self-weight of the flue support 100, and local wind loads and seismic loads, the overall force transmission system among the absorption tower 220, the clean flue 210, and the flue support 100 is coordinated. Professional structural calculation software is used to analyze the structural strength of the three components, determine the corresponding member selection, and ensure that the flue support 100 meets the design requirements of the specifications.

[0062] like Figure 8 As shown, the distance between the first support steel column 111 and the second support steel column 112 is 9m, the distance between the third support steel column 121 and the fourth support steel column 122 is 8m, the distance between the fourth support steel column 122 and the fifth support steel column 123 is 9m, and the distance between the fifth support steel column 123 and the sixth support steel column 124 is 8m; the fourth support intermediate beam 135 is provided at intervals between the first support steel column 111 and the third support steel column 121, and between the second support steel column 112 and the sixth support steel column 124.

[0063] All other unspecified parts belong to the prior art.

Claims

1. A two-framed structure suitable for large span clean flue support, characterized in that: The flue support (100) is arranged at the bottom of the clean flue (210), the left end of the clean flue (210) is connected with the absorption tower (220), and the right end is connected with the chimney (230); The flue support (100) comprises a first support (110) and a second support (120), the first support (110) is located on the left side of the second support (120), and the circulating pump house (240) is arranged on the left side of the first support (110); The first support (110) comprises first support steel columns (111) and second support steel columns (112) arranged at intervals, and the second support (120) comprises third support steel columns (121), fourth support steel columns (122), fifth support steel columns (123) and sixth support steel columns (124) arranged at intervals. First support intermediate beams (131) are arranged at intervals between the first support steel columns (111) and the second support steel columns (112) and between the fourth support steel columns (122) and the fifth support steel columns (123), second support intermediate beams (132) are arranged at intervals between the third support steel columns (121) and the fourth support steel columns (122) and between the fifth support steel columns (123) and the sixth support steel columns (124), and third support intermediate beams (133) are arranged at intervals between the first support steel columns (111) and the fourth support steel columns (122) and between the second support steel columns (112) and the fifth support steel columns (123). Support inclined braces (140) are arranged between adjacent first support intermediate beams (131), between adjacent second support intermediate beams (132) and between adjacent third support intermediate beams (133).

2. A two-bay braced structure suitable for long span clear stack support according to claim 1, wherein: The first support steel columns (111), the second support steel columns (112), the third support steel columns (121), the fourth support steel columns (122), the fifth support steel columns (123) and the sixth support steel columns (124) are installed in the concrete foundation (300), and fine stone concrete (310) is poured in the first support steel columns (111), the second support steel columns (112), the third support steel columns (121), the fourth support steel columns (122), the fifth support steel columns (123) and the sixth support steel columns (124) to above the concrete foundation (300).

3. A two-bay braced structure suitable for long span clear stack support according to claim 2, wherein: Support top surface beams (134) are arranged between the top of the first support steel column (111) and the top of the second support steel column (112), between the top of the fourth support steel column (122) and the top of the fifth support steel column (123), between the top of the first support steel column (111) and the top of the fourth support steel column (122), and between the top of the second support steel column (112) and the top of the fifth support steel column (123). The support top surface beams (134) are connected with the bottom of the clean flue (210) through clean flue limiting supports (400).

4. A two-bay braced structure suitable for long span clear stack support according to claim 3, wherein: Clean flue triangular inner supports (500) are arranged in the clean flue (210).

5. A two-bay braced structure suitable for long span clear stack support according to claim 4, wherein: The middle part of the first support middle beam (131) of the lower layer is connected with both ends of the first support middle beam (131) of the upper layer through the first support diagonal brace (141); the plurality of first support diagonal braces (141) form a diamond shape.

6. A two-bay braced structure suitable for long span clear stack support according to claim 5, wherein: The height of the third support steel column (121) and the sixth support steel column (124) is lower than the height of the fourth support steel column (122) and the fifth support steel column (123); The height of every two layers of the second support middle beam (132) is equal to the height of three layers of the first support middle beam (131); the end of the second support middle beam (132) of the lower layer away from the first support middle beam (131) is connected with the end of the second support middle beam (132) of the upper layer close to the first support middle beam (131) through the second support diagonal brace (142); the plurality of second support diagonal braces (142) form a zigzag shape.

7. A two-bay braced structure suitable for long span clear stack support according to claim 6, wherein: The top of the third support steel column (121) is connected with the first support middle beam (131) of the corresponding middle layer of the fourth support steel column (122) through the second support diagonal brace (142); the top of the sixth support steel column (124) is connected with the first support middle beam (131) of the corresponding middle layer of the fifth support steel column (123) through the second support diagonal brace (142).

8. A two-bay braced structure suitable for long span clear stack support according to claim 7, wherein: The middle part of the first layer of the third support middle beam (133) from bottom to top is connected with both ends of the second layer of the third support middle beam (133) through the third support diagonal brace (143); the rest of the third support middle beams (133) are connected through the fourth support diagonal brace (144).

9. A two-bay braced structure suitable for long span clear stack support according to claim 8, wherein: The middle part of the first support middle beam (131) of the lowest layer is connected between the bottom of the first support steel column (111) and the bottom of the second support steel column (112), the bottom of the fourth support steel column (122) and the bottom of the fifth support steel column (123) through the fifth support diagonal brace (145); The end of the second support middle beam (132) of the lowest layer away from the first support middle beam (131) is connected between the bottom of the fourth support steel column (122) and the bottom of the fifth support steel column (123) through the sixth support diagonal brace (146); The middle part of the third support middle beam (133) of the lowest layer is connected with the bottom of the first support steel column (111) and the bottom of the fourth support steel column (122), the bottom of the second support steel column (112) and the bottom of the fifth support steel column (123) through the seventh support diagonal brace (147).

10. A two-bay braced structure suitable for long span clear stack support according to claim 9, wherein: The first support steel column (111), the second support steel column (112), the third support steel column (121), the fourth support steel column (122), the fifth support steel column (123), the sixth support steel column (124), the first support middle beam (131), the second support middle beam (132), the third support middle beam (133) and the support diagonal brace (140) adopt a round pipe, and the net flue limiting support (400) adopts an H-shaped steel.

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