CN109442446B - Flue arrangement supporting structure of thermal power factory - Google Patents
Flue arrangement supporting structure of thermal power factory Download PDFInfo
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- CN109442446B CN109442446B CN201811022574.3A CN201811022574A CN109442446B CN 109442446 B CN109442446 B CN 109442446B CN 201811022574 A CN201811022574 A CN 201811022574A CN 109442446 B CN109442446 B CN 109442446B
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- flue
- steel frame
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- frame members
- thermal power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/02—Vertical ducts; Channels, e.g. for drainage for carrying away waste gases, e.g. flue gases; Building elements specially designed therefor, e.g. shaped bricks or sets thereof
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- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a flue arrangement supporting structure of a thermal power plant, which comprises: the flue gas purification device comprises a plurality of supporting units (2), wherein each supporting unit (2) comprises 4n steel frame members (21), 3n transverse inner supporting rods (22) and 2-4 oblique inner supporting rods (23), n steel frame members (21) are arranged on the outer side of each supporting plate (1) along the flow direction of flue gas, and the steel frame members (21) on two adjacent supporting plates (1) are correspondingly connected one by one to form n flue sections (24); each flue section (24) is divided into four sub-sections (241) by three transverse inner support rods (22); an inclined inner supporting rod (23) is arranged in any one of the n flue sections (24), one inclined inner supporting rod (23) is correspondingly arranged in one sub-section (241), the arrangement interval of the inclined inner supporting rods (23) is not more than n along the flowing direction of flue gas, and the arrangement number of the inclined inner supporting rods (23) is reduced on the premise that the horizontal stability of the flue is guaranteed.
Description
Technical Field
The invention relates to the field of steel structures, in particular to a flue arrangement supporting structure of a thermal power plant.
Background
The thermal power factory utilizes coal-fired heating boiler to heat water, makes water steam, and steam drives turbo generator electricity generation, and the flue gas that the boiler coal-fired produced is carried through the flue, through dust removal, desulfurization, denitration treatment after, discharges into in the atmosphere from the chimney. Therefore, the flue plays an indispensable role in the operation of the thermal power plant.
At present, a flue is composed of four flue walls, a plurality of steel frame members are arranged and fixed on the outer wall of the flue on each surface at equal intervals along the flowing direction of flue gas, the steel frame members on the adjacent outer wall surfaces are connected, a flue arrangement supporting structure is arranged in the section of the flue surrounded by the steel frame members, and the flue is composed of three transverse inner support rods and oblique inner support rods arranged between the adjacent steel frame members and the transverse inner support rods or between the adjacent two transverse inner support rods.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
the existing flue arrangement supporting structure ensures the stability of the flue structure in the horizontal direction, but also increases the passing resistance of flue gas, is not beneficial to the effective emission of the flue gas, and the flue needs to be provided with a draught fan with higher power, so that the energy consumption and the production cost are increased.
Disclosure of Invention
In view of this, the present invention provides a flue arrangement support structure of a thermal power plant to reduce the passing resistance of flue gas.
Specifically, the method comprises the following technical scheme:
the utility model provides a support structure is arranged to flue of thermal power factory, sets up on the flue, the flue includes four backup pads, adjacent two the plane mutually perpendicular at backup pad place, support structure is arranged to the flue includes: a plurality of supporting units, wherein,
each supporting unit comprises 4n steel frame members, 3n transverse inner supporting rods and 2-4 oblique inner supporting rods, wherein n steel frame members are arranged on the outer side of each supporting plate along the flow direction of flue gas, and the steel frame members on two adjacent supporting plates are correspondingly connected one by one to form n flue sections;
three transverse inner supporting rods are arranged in each flue section from top to bottom, and each flue section is divided into four sub-sections by the three transverse inner supporting rods;
the inclined inner supporting rods are arranged in any one of the n flue sections, one inclined inner supporting rod is correspondingly arranged in one sub-section, and the arrangement interval of the inclined inner supporting rods is not more than n along the flowing direction of the flue gas.
Alternatively, the n is obtained according to the following calculation formula:
n=Min(nc，nb)
in the formula: n iscIs a first number, and takes the value as an integer; n isbIs a second number, taking the value as an integer; n is the number of the cross sections of the flues in one supporting unit, and the value is an integer; x is the number of the steel frame members in each flue section; m is the number of the oblique inner supporting rods in one supporting unit; gamma ray0The structural importance coefficient is a constant; rdc1，Rdc2，……，RdcxThe design value of the bearing capacity which can be achieved by one steel frame member in each flue section in one supporting unit; sdc1，Sdc2，……，SdcxDesigning a load effect design value for one steel frame member in each flue section in one supporting unit; rdb1，Rdb2，……，RdbmThe design value of the bearing capacity which can be achieved by each inclined inner supporting rod in one supporting unit; sdb1，Sdb2，……，SdbmAnd designing the load effect of each inclined inner supporting rod in one supporting unit.
Alternatively, n steel frame members provided at the outer side of each support plate in one support unit are arranged at equal intervals by a first preset distance, and the steel frame members are connected to the support plates.
Optionally, three transverse inner supporting rods in each flue section in one supporting unit are arranged at equal intervals at a second preset distance, and the transverse inner supporting rods are connected with the supporting plate.
Alternatively, in one support unit, one end of each of the diagonal inner struts is connected to the transverse inner strut, and the other end is connected to the transverse inner strut or the steel frame member parallel to the transverse inner strut.
Optionally, the rod diameter of the oblique inner stay is the same as the rod diameter of the transverse inner stay.
Optionally, the extending direction of each oblique inner supporting rod is parallel to the diagonal direction of the rectangle of the corresponding sub-section.
Optionally, the extending directions of two adjacent oblique inner supporting rods in the same flue section are not parallel to each other.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the flue arrangement supporting structure of the thermal power plant provided by the embodiment of the invention is arranged on a flue and comprises a plurality of supporting units, wherein each supporting unit comprises 4n steel frame members, 3n transverse inner supporting rods and 2-4 oblique inner supporting rods, n steel frame members are arranged on the outer side of each supporting plate along the flow direction of flue gas, the steel frame members on two adjacent supporting plates are correspondingly connected one by one to form n flue sections, three transverse inner supporting rods are arranged in each flue section from top to bottom, so that the flue section is divided into four sub-sections, the oblique inner supporting rods are arranged in any one of the n flue sections, one oblique inner supporting rod is correspondingly arranged in one sub-section, the arrangement interval of the oblique inner supporting rods is not more than n along the flow direction of the flue gas, and the horizontal force born by the steel frame member corresponding to the flue section without the oblique inner supporting rods is transferred to the oblique steel frame members by utilizing the in-plane rigidity of the supporting plates The steel frame component of the inward stay bar ensures that the horizontal direction of the flue is stable, reduces the arrangement quantity of the oblique inner stay bars on the premise of the safety of the structure, reduces the passing resistance of the flue gas, and saves the production cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a front view of a flue arrangement support structure of a thermal power plant according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic cross-sectional view taken along line B-B in fig. 1.
The reference numerals in the figures are denoted respectively by:
1-a support plate, wherein the support plate is provided with a plurality of support plates,
2-supporting units, 21-steel frame members, 22-transverse inner supporting rods, 23-oblique inner supporting rods, 24-flue sections, 241-sub sections,
3-a baffle plate door, wherein the baffle plate door is arranged on the baffle plate door,
4-expansion joint.
Detailed Description
Before further detailed description of the embodiments of the present invention, the terms of orientation, such as "upper" and "lower", referred to in the embodiments of the present invention are used only for clearly describing the flue arrangement support structure of the thermal power plant of the embodiments of the present invention, with reference to the orientation shown in fig. 2 or fig. 3, and are not intended to limit the scope of the present invention.
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the invention provides a flue arrangement supporting structure of a thermal power plant, the front view of which is shown in fig. 1, the flue is arranged on a flue, the flue comprises four supporting plates 1, the planes of two adjacent supporting plates 1 are perpendicular to each other, and the arrangement structure comprises: a plurality of support units 2.
Each support unit 2 comprises 4n steel frame members 21, 3n transverse inner support rods 22 and 2-4 oblique inner support rods 23, wherein n steel frame members 21 are arranged on the outer side of each support plate 1 along the flow direction of flue gas, and the steel frame members 21 on two adjacent support plates 1 are correspondingly connected one by one to form n flue sections 24;
three transverse inner supporting rods 22 are arranged in each flue section 24 from top to bottom, and each flue section 24 is divided into four sub-sections 241 by the three transverse inner supporting rods 22, as shown in fig. 2;
an inclined inner brace 23 is arranged in any one of the n flue sections 24, one inclined inner brace 23 is correspondingly arranged in one sub-section 241, and the arrangement interval of the inclined inner braces 23 is not more than n along the flow direction of the flue gas, as shown in fig. 3.
It will be appreciated that a plurality of support units 2 are evenly arranged on the flue, as shown in figure 1.
Therefore, the flue arrangement support structure of the thermal power plant of the embodiment of the invention utilizes a plurality of support units 2, n steel frame members 21 are arranged on the outer side of each support plate 1 along the flow direction of flue gas, the steel frame members 21 on two adjacent support plates 1 are correspondingly connected one by one to form n flue sections 24, three transverse inner support rods 22 are arranged in each flue section 24 from top to bottom, so that the flue section 24 is divided into four sub-sections 241, an inclined inner support rod 23 is arranged in any one of the n flue sections 24, one inclined inner support rod 23 is correspondingly arranged in one sub-section 241, the arrangement interval of the inclined inner support rods 23 is not more than n along the flow direction of flue gas, and the horizontal force borne by the steel frame member 21 corresponding to the flue section 24 without the inclined inner support rods 23 is transmitted to the steel frame member 21 provided with the inclined inner support rods 23 by utilizing the in-plane rigidity of the support plate 1, on the premise of ensuring the horizontal stability of the flue and the safety of the structure, the arrangement quantity of the inclined inner support rods 23 is reduced, and the passing resistance of smoke is reduced, so that the energy consumption of the running of the fan is reduced, and the production cost is saved.
In the actual construction and use process, the value of n needs to be defined so as to facilitate the layout of the supporting units 2.
Specifically, n is obtained according to the following calculation formula:
n=Min(nc，nb)
in the formula: n iscIs a first number, and takes the value as an integer; n isbIs a second number, taking the value as an integer; n is the number of flue sections 24 in one supporting unit 2, and the value is an integer; x is the number of frame members 21 in each flue section; m is the number of the inclined inner supporting rods 23 in one supporting unit 2, and the value is 2, 3 or 4; gamma ray0The structural importance coefficient is a constant; rdc1，Rdc2，……，RdcxThe design value of the bearing capacity which can be achieved by one steel frame member 21 in each flue section 24 in one supporting unit 2; sdc1，Sdc2，……，SdcxThe design value of the load effect of one steel frame member 21 in each flue section 24 in one supporting unit 2 is obtained; rdb1，Rdb2，……，RdbmThe design value of the bearing capacity which can be achieved by any one inclined inner supporting rod 23 in each flue section 24 in one supporting unit 2; sdb1，Sdb2，……，SdbmThe design value for the loading effect of each diagonal inner strut 23 in one support element 2.
In one aspect, the term "γ" refers to γ0The value of (A) can be regulated according to 7.0.3 article in the unified design Standard for reliability of building Structure (GB 50068-2001): when the safety grade is one, two or three grade or the design service life is 100 years and more, 50 and 5 years, the importance coefficients are not less than 1.1, 1.0 and 0.9 respectively.
On the other hand, the role of the Min (number1, number2, …) function is to return to the minimum value in a given parameter table.
For example, ncIs that
Minimum value of (1), nbIs thatThe value of n is ncAnd nbIn (1)A minimum value.
In the embodiment of the present invention, the value of n may be 4.
Based on the above, the following further describes the flue arrangement support structure of a thermal power plant according to an embodiment of the present invention:
as for the support plates 1, the support plates 1 constitute a main body of the flue, and the flue is constituted by connecting adjacent two support plates 1.
Further, the thickness of the support plate 1 may be 3 to 6 mm.
It should be noted that, if the thickness of the supporting plate 1 is greater than 6mm, the construction amount of the flue structure is large, and the economical efficiency is poor; if the thickness of the support plate 1 is less than 3mm, the flue structure is susceptible to corrosive leakage.
In each support unit 2, the steel frame member 21 plays a main support role for the flue with respect to the steel frame member 21.
Specifically, n steel frame members 21 are disposed at equal intervals at a first preset distance outside each support plate 1 in one support unit 2, as shown in fig. 1, and the steel frame members 21 are connected to the support plates 1, so that the steel frame members 21 are fixedly connected to the support plates 1.
The first preset distance can be calculated according to the strength condition, the rigidity condition and the vibration condition, the values of the first preset distance under different conditions are calculated according to the prior art respectively, and the minimum value of the calculation of the three is taken during design.
It should be noted that the reference value of the first preset distance is a theoretical maximum value, and a value can be taken according to actual needs in production.
In the embodiment of the present invention, the first predetermined distance may be 750 mm and 800mm, such that the length of one supporting unit 2 is preferably about 3 m.
As for the transverse inner strut 22, the transverse inner strut 22 plays a role of supporting the flue section 24.
In terms of structural arrangement, three transverse inner supporting rods 22 in each flue section 24 in one supporting unit 2 are arranged at equal intervals at a second preset distance, and the transverse inner supporting rods 22 are connected with the supporting plate 1, so that the transverse inner supporting rods 22 are fixedly connected with the supporting plate 1.
The second preset distance is a third-equal value of the length of the steel frame member 21 perpendicular to the transverse inner stay 22, so that the transverse inner stays 22 can be uniformly distributed in each flue section 24, and horizontal balanced stress is facilitated.
For the diagonal inner brace 23, the diagonal inner brace 23 and the transverse inner brace 22 cooperate to support the flue section 24.
In the connection relation, one end of each oblique inner supporting rod 23 in one supporting unit 2 is connected with the transverse inner supporting rod 22, and the other end is connected with the transverse inner supporting rod 22 or the steel frame member 21 parallel to the transverse inner supporting rod 22, so that the connection and fixation of the oblique inner supporting rods 23 are facilitated.
Meanwhile, the rod diameter of the oblique inner stay 23 can be the same as that of the transverse inner stay 22, so that the materials can be conveniently taken.
In the present embodiment, the transverse inner strut 22 may be an 89 seamless tube or a 133 steel tube.
It should be noted that, when the number of flue sections 24 in one supporting unit 2 is large, the rod diameter of the oblique inner brace 23 may be larger than that of the transverse inner brace 22, so as to achieve better supporting; conversely, when the number of flue sections 24 in one support unit 2 is small, the rod diameter of the diagonal inner brace 23 may be smaller than that of the transverse inner brace 22, so as to save cost.
In terms of structural arrangement, on one hand, the extending direction of each oblique inner supporting rod 23 is parallel to the diagonal direction of the rectangle in which the corresponding sub-section 241 is located, as shown in fig. 3, so that the force transmission is facilitated.
On the other hand, the extending directions of two adjacent oblique inner supporting rods 23 in the same flue section 24 are not parallel to each other, so that the stress in the flue section 24 is balanced.
As mentioned above, in an embodiment of the present invention, a flapper door 3 and expansion joint 4 are also provided, as shown in FIG. 1.
The baffle door 3 penetrates through the four supporting plates 1 of the flue and is supported and arranged in the flue by utilizing the bracket, as shown in figure 1, the baffle door 3 comprises a plurality of plate leaves, when the baffle door is not used, the direction of the plate leaves is parallel to the flowing direction of the flue gas, and the flue gas can smoothly pass through the baffle door; when the smoke-proof door needs to be used, the direction of the plate is vertical to the flowing direction of smoke, and the smoke can not pass through the baffle door 3 any more. The baffle door 3 can be closed to block the flue when the flue fails to operate, for example, leakage and other accident conditions can not continue to operate, the flue gas is discharged by arranging the bypass flue, and the flue gas is opened to continue to discharge the flue gas after maintenance is finished.
The expansion joint 4 is made of rubber materials and arranged on the outer surface of the supporting plate 1 at intervals, as shown in fig. 1, the sum of the perimeter of the expansion joint 4 and the side length of the section 24 of the flue is the same, as flue gas inside the flue usually has higher temperature, the flue is easy to generate larger expansion deformation, and the flue is damaged due to the overlarge expansion deformation, so that the expansion deformation of the flue can be controlled by arranging the expansion joint 4, and the damage of the flue due to the overlarge expansion deformation is avoided.
In the actual use process, after the fixed connection of the steel frame members 21 is realized one by one for each supporting unit 2 on the basis of the existing flue structure, the fixed connection of the transverse inner supporting rods 22 is realized, and finally the fixed connection of the inclined inner supporting rods 23 is realized, so that the installation of the flue arrangement supporting structure of the thermal power plant is completed, and the construction is convenient.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A flue arrangement support structure of a thermal power plant is arranged on a flue, the flue comprises four support plates (1), and the planes of two adjacent support plates (1) are perpendicular to each other, and the flue arrangement support structure comprises: a plurality of support units (2), wherein,
each supporting unit (2) comprises 4n steel frame members (21), 3n transverse inner supporting rods (22) and 2-4 oblique inner supporting rods (23), wherein n steel frame members (21) are arranged on the outer side of each supporting plate (1) along the flowing direction of smoke, and the steel frame members (21) on two adjacent supporting plates (1) are correspondingly connected one by one to form n flue sections (24);
three transverse inner supporting rods (22) are arranged in each flue section (24) from top to bottom, and each flue section (24) is divided into four sub-sections (241) by the three transverse inner supporting rods (22);
the inclined inner supporting rods (23) are arranged in any one of the n flue sections (24), one inclined inner supporting rod (23) is correspondingly arranged in one sub-section (241), and the arrangement interval of the inclined inner supporting rods (23) is not more than n along the flowing direction of the flue gas.
2. The flue arrangement support structure of a thermal power plant according to claim 1, wherein n is obtained according to the following calculation formula:
n＝Min(nc，nb)
in the formula: n iscIs a first number, and takes the value as an integer; n isbIs a second number, taking the value as an integer; n is the number of flue sections (24) in one supporting unit (2), and the value is an integer; x is the number of steel frame members (21) in each flue section (24); m is the number of the oblique inner supporting rods (23) in one supporting unit (2); gamma ray0The structural importance coefficient is a constant; rdc1，Rdc2，……，RdcxThe design value of the bearing capacity which can be achieved by one steel frame member (21) in each flue section (24) in one supporting unit (2); sdc1，Sdc2，……，SdcxFor each flue section in one of said support units (2) (2)24) A design value for the load effect of one of the steel frame members (21); rdb1，Rdb2，……，RdbmThe design value of the bearing capacity which can be achieved by each oblique inner supporting rod (23) in one supporting unit (2); sdb1，Sdb2，……，SdbmDesigning a load effect design value for each diagonal inner stay (23) in one support unit (2).
3. The flue duct arrangement support structure of a thermal power plant according to claim 1, wherein n steel frame members (21) provided at an outer side of each of the support plates (1) in one support unit (2) are arranged at equal intervals by a first predetermined distance, and the steel frame members (21) are connected to the support plates (1).
4. The flue arrangement support structure of a thermal power plant according to claim 1, characterized in that three of the transverse inner braces (22) in each of the flue sections (24) in one support unit (2) are arranged at equal intervals at a second preset distance, and the transverse inner braces (22) are connected to the support plate (1).
5. The flue arrangement support structure of a thermal power plant according to claim 1, wherein each of the diagonal inner braces (23) in one support unit (2) is connected at one end to the transverse inner brace (22) and at the other end to the transverse inner brace (22) or the steel frame member (21) parallel to the transverse inner brace (22).
6. The flue arrangement support structure of a thermal power plant according to claim 1, wherein a rod diameter of the diagonal inner brace (23) is the same as a rod diameter of the lateral inner brace (22).
7. The flue duct arrangement support structure of a thermal power plant according to claim 1, wherein each of the diagonal inner braces (23) extends in a direction parallel to a diagonal direction of a rectangle in which the corresponding sub-section (241) is located.
8. The flue arrangement support structure of a thermal power plant according to claim 1, wherein the extending directions of two adjacent diagonal inner braces (23) in the same flue section (24) are not parallel to each other.
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| CN201811022574.3A CN109442446B (en) | 2018-09-03 | 2018-09-03 | Flue arrangement supporting structure of thermal power factory |
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| US20110136423A1 (en) * | 2009-12-04 | 2011-06-09 | Qun Xia | Large Diameter FRP Flues In Large Diameter Chimneys |
| CN201599783U (en) * | 2010-01-08 | 2010-10-06 | 中国石油化工集团公司 | Coal-fired superheated steam generator |
| CN202868721U (en) * | 2012-10-26 | 2013-04-10 | 无锡锡能锅炉有限公司 | Horizontal coal-fired boiler smoke separating wall structure |
| CN105164469B (en) * | 2014-02-19 | 2018-06-08 | 王森 | Include the fluidized-bed combustion boiler of multifunctional inertia gravity separator |
| CN205537164U (en) * | 2016-04-29 | 2016-08-31 | 山东岱荣节能环保科技有限公司 | Flue gas waste heat recovery device for sintering machine |
| CN206208040U (en) * | 2016-11-25 | 2017-05-31 | 北京京诚凤凰工业炉工程技术有限公司 | Push away steel formula heating furnace natural circulation waste heat recovery system and natural circulation formula evaporimeter |
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Inventor after: Huang Youqiang Inventor after: Chen Shixi Inventor after: Ye Changfeng Inventor after: Zhang Suoqing Inventor before: Huang Xiaohui Inventor before: Chen Shixi Inventor before: Zhang Suoqing Inventor before: Ye Changfeng Inventor before: Wang Xuexin Inventor before: Huang Youqiang Inventor before: Zhou Nan Inventor before: Chen Wenhe |