CN216358924U

CN216358924U - Desulfurization absorption tower top promotes structure

Info

Publication number: CN216358924U
Application number: CN202122828985.5U
Authority: CN
Inventors: 黄舒伟; 黄琳; 周永航
Original assignee: Guangdong Yuelong Power Generation Co ltd
Current assignee: Guangdong Yuelong Power Generation Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-04-22
Anticipated expiration: 2031-11-17

Abstract

A top lifting structure of a desulfurization absorption tower relates to the technical field of desulfurization absorption towers. The absorption tower contains the absorption tower top that the absorption tower wall and cut apart, is equipped with a plurality of supporting beams in the absorption tower wall, is provided with the lifting means in the absorption tower, and the lifting means includes: the dead lever sets up perpendicularly on a supporting beam, and the dead lever is equipped with a plurality of roots, and the even circle of dead lever is established in the absorption tower, and the absorption tower top is equipped with the mounting hole that corresponds with the dead lever, and the mounting hole is worn to establish by the dead lever, and the one end of keeping away from a supporting beam on the dead lever is assembled to the piece of carrying, and the portion of carrying and drawing is connected with the absorption tower top. The lifting piece is a chain block. The absorption tower adopting the technical scheme has the advantages that the special frame is made of the steel pipe, the top of the absorption tower is balanced and lifted by matching with the hand-operated hoist, a large number of safety guarantee devices do not need to be additionally installed in the jacking process, the requirement on the surrounding environment of the absorption tower is avoided, and the absorption tower is simple and convenient.

Description

Desulfurization absorption tower top promotes structure

Technical Field

The utility model relates to the technical field of desulfurization absorption towers, in particular to a top lifting structure of a desulfurization absorption tower.

Background

The patent technology relates to a structure and a method for jacking the top of an absorption tower for purifying flue gas in a thermal power plant. The principle of the absorption tower is as follows: the flue gas enters the absorption tower from the middle part of the absorption tower, a spraying layer is arranged in the absorption tower, limestone slurry is sprayed downwards by the spraying layer, and the limestone slurry is in contact with sulfur dioxide in the flue gas to generate chemical reaction to generate calcium sulfate, so that the sulfur dioxide in the flue gas is removed, and the requirement of environmental protection emission is met. Flue gas gets into from the absorption tower middle part to discharge from the absorption tower top, because the flue gas can carry fog grain and thick liquid, the thick liquid can cause serious corruption to the flue behind the absorption tower, so the defroster is installed on absorption tower upper portion. The demister has the function of collecting the ash particles and slurry drops carried by the flue gas in the spray absorption process. After the absorption tower carries out ultralow emission transformation, for detach the thick liquid and the grits in the flue gas better, need reform transform the defroster of absorption tower, change ridge formula defroster for tube bank formula dust removal defogging device, because tube bank formula dust removal defogging device is bulky, so need be separately the top cutting of absorption tower to improve in order to vacate the installation space of defogging device. Generally, the absorption tower is lifted by adopting a hydraulic jacking technical scheme. However, because the top of the absorption tower is connected with a rectangular flue, the center of gravity of the top of the absorption tower deviates from the center of the absorption tower due to the rectangular flue, if a conventional hydraulic jacking technical scheme is adopted in the top lifting process, the top of the absorption tower is very easy to incline, and a safety accident is caused due to instability in the serious case.

Therefore, a lifting structure at the top of the desulfurization absorption tower needs to be researched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lifting structure for the top of a desulfurization absorption tower, aiming at the defects and shortcomings of the prior art, and having the advantages of realizing the balanced lifting and jacking process of the top of the absorption tower by manufacturing a special frame with a steel pipe and matching with a manual hoist, having no need of additionally installing a large number of safety guarantee devices, having no requirement on the environment around the absorption tower, and being simple and convenient.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a desulfurization absorption tower top promotes structure, absorption tower contain absorption tower wall and cut apart the absorption tower top, be equipped with a plurality of supporting beams in the absorption tower wall, be provided with the promotion subassembly in the absorption tower, the promotion subassembly includes: the fixed rods are vertically arranged on the supporting beams and are provided with a plurality of pieces, the fixed rods are uniformly arranged in the absorption tower in a surrounding manner, mounting holes corresponding to the fixed rods are formed in the top of the absorption tower, and the fixed rods penetrate through the mounting holes; and the lifting part of the lifting piece is connected with the top of the absorption tower.

The lifting piece is a chain block.

And a fixed rib plate is arranged at the joint of the fixed rod and the supporting beam.

Eight fixed rods are arranged.

The supporting beam is ╡ ╞ type setting, the dead lever evenly set up in the end of every roof beam of supporting beam.

The supporting beam is I-shaped steel.

The I-shaped steel is I25 in model number.

And a lifting point device is arranged at the joint of the lifting piece and the absorption tower top.

The fixed rod is a phi 219 seamless steel pipe.

After the technical scheme is adopted, the utility model has the beneficial effects that:

1. the absorption tower contains the absorption tower top that the absorption tower wall and cut apart, is equipped with a plurality of supporting beams in the absorption tower wall, is provided with the lifting means in the absorption tower, and the lifting means includes: the dead lever sets up perpendicularly on a supporting beam, and the dead lever is equipped with a plurality of roots, and the even circle of dead lever is established in the absorption tower, and the absorption tower top is equipped with the mounting hole that corresponds with the dead lever, and the mounting hole is worn to establish by the dead lever, and the one end of keeping away from a supporting beam on the dead lever is assembled to the piece of carrying, and the portion of carrying and drawing is connected with the absorption tower top. The lifting assembly arranged in this way has the advantages that the special frame is made of the steel pipe, the top of the absorption tower is balanced and lifted by matching with the manual hoist, a large number of safety guarantee devices are not additionally installed in the jacking process, and the requirement and the simplicity and the convenience are not required for the surrounding environment of the absorption tower.

2. The existing method for lifting the top of the absorption tower generally adopts a hydraulic lifting method, the method easily causes the lifting and the inclination of the top of the absorption tower, a large amount of auxiliary safety device facilities need to be installed for avoiding the inclination, and the cost is greatly increased. The lifting device provided by the utility model takes the supporting beam as a supporting part, 8 phi 219x8 seamless steel tube lifting upright posts are vertically installed, and 8 10T chain blocks integrally lift the tower top, so that the problem that the top of the absorption tower is easy to incline during lifting can be thoroughly solved, and a large amount of equipment cost is saved;

4. the construction difficulty is greatly reduced, the construction technology and safety management are innovated, a set of technical management innovation of jacking construction in the absorption tower transformation is explored, and the project can be effectively, safely and successfully completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a bottom view corresponding to FIG. 1;

fig. 3 is a partial structural schematic diagram of the present invention.

Description of reference numerals: 1. an absorption column wall; 2. absorbing the top of the tower; 21. mounting holes; 3. a lifting assembly; 31. a hoisting point device; 32. a chain block; 321. lifting lugs; 322. hooking; 323. pulling a chain by hand; 33. a suspension plate; 34. fixing the rod; 35. fixing the rib plate; 4. and supporting the beam.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment as necessary without making a contribution thereto after reading the present specification, but all are protected by patent laws within the scope of the claims of the present invention.

The present embodiment relates to a 2-part lifting structure at the top of a desulfurization absorption tower, as shown in fig. 1, fig. 2 and fig. 3, including: absorption tower wall 1, absorption tower top 2, mounting hole 21, hoisting point device 31, chain block 32, lifting lug 321, hook 322, chain 323, suspension plate 33, fixing rod 34, fixing rib plate 35 and support beam 4

The absorption tower contains absorption tower wall 1 and cuts apart the absorption tower top 2 that divides into, is equipped with a plurality of supporting beam 4 in the absorption tower wall 1, is provided with in the absorption tower and promotes subassembly 3, promotes subassembly 3 and includes: the fixed rod 34 is vertically arranged on the supporting beam 4, the fixed rod 34 is provided with a plurality of rods, the fixed rod 34 is uniformly arranged in the absorption tower in a surrounding mode, the top 2 of the absorption tower is provided with a mounting hole 21 corresponding to the fixed rod 34, the fixed rod 34 penetrates through the mounting hole 21, the lifting piece is assembled at one end, far away from the supporting beam 4, of the fixed rod 34, and the lifting portion of the lifting piece is connected with the top 2 of the absorption tower. In this embodiment, the supporting beam 4 is ╡ ╞ -shaped, the fixing rods 34 are uniformly arranged at the end of each beam of the supporting beam 4, and a cross bar is further arranged in the middle of the supporting beam for improving the stability of the whole structure. Eight fixing rods 34 are provided. The connection part of the lifting piece and the absorption tower top 2 is provided with a lifting point device 31. The lifting piece is a chain block 32, a lifting lug 321 of the chain block 32 hooks the lifting point device 31, and a hook 322 of the chain block 32 is hung on the lifting point device 31. The support beam 4 is an I-shaped steel. The I-shaped steel is I25. The fixing rod 34 is a phi 219 seamless steel pipe. The fixing rib plate 35 is arranged at the joint of the fixing rod 34 and the supporting beam 4, thereby improving the connection stability of the fixing rod 34 and the supporting beam 4

Scientifically calculating the stress condition of the tower top:

the total weight of the tower top above the dividing line is about 28t, 8 hand chain blocks 32 with 10t are hung by 8 fixing rods 34, the weight distribution of the tower top is not uniform, and the calculation is carried out at each hanging point according to the stress P of 10 t. The fixed rod 34 is a 219X8 steel pipe made of Q235 and is 5m long; the sectional area A of the fixing rod 34 is 5300mm, and the inertia moment I is 29539346mm 4. The allowable tensile (compressive) stress [ σ ] and the allowable shear stress [ τ ] of Q235 were 150MPa and 100MPa, respectively.

Calculation of the strength of the fixing rod 34: through analysis and calculation, the axial force N borne by the fixing rod 34 is 11.732t, sigma is N/A is 22MPa < [ sigma ], and the strength meets the requirement.

And (3) stability calculation: the length coefficient 0.5 is taken out according to the fixation of both ends, the length-fineness ratio is calculated to obtain lambda which is 20, the stability coefficient phi which is obtained by looking up the table is 0.981, and sigma which is N/phi A which is 23MPa < [ sigma ]

Calculating the strength of the 32 lifting points of the chain block: the suspension point is calculated by taking a lifting lug 321 (made of Q235) at the top of the fixed rod 34 as an example, the distance from the center of a hole of the lifting lug 321 to the side of the fixed rod 34 is 200mm, the section of the lifting lug 321 is 250X20mm, and the section resisting moment W is 208333mm 3.

The bending strength of the lifting lug 321 is calculated: the sigma-M/W-100000 multiplied by 200/208333-96 MPa < [ sigma ], meets the requirement;

calculating the shearing strength of the lifting lug 321 (the distance from the hole edge of the lifting lug 321 to the outer edge is calculated according to 50 mm):

tau is 100000/(20 multiplied by 50 multiplied by 2) 80MPa < [ tau ], which meets the requirement;

the welding seam of the lifting lug 321 and the support beam 4 is calculated: the shearing force is mainly calculated, and the sectional area 1 of the welding seam is P/0.8[ tau ] - [ 100000/800 ] - [ 125mm2 according to the load bearing 10t of the supporting beam 4 under the lifting lug 321 and the fixing rod 34. The requirement can be met by ensuring that the shearing area of the welding seam is not less than 125mm 2.

The installation process of the device comprises the following steps: prepare before the construction → unpack apart absorption tower outer joint and absorption tower defroster → lift subassembly 3 arranges → tower body cutting, promote → equipment tower wallboard, when this device of needs installation, the outer round region of absorption tower is set up hard safety and is enclosed the fender and keep apart, need according to promoting in the absorption tower, set up the scaffold frame outward, the scaffold frame makes hard the isolation in the tower, so that the work of old pipe except supporting beam 4 below goes on simultaneously, in the support department of supporting beam 4, install 8 phi 219x8 seamless steel pipe dead lever 34 perpendicularly, dead lever 34 is close to the installation of tower wall. Because the length of the fixing rod 34 is about 5m and exceeds the inner space of the upper part of the supporting beam 4, a mounting hole 21 with the square of about 600 mm needs to be opened at the corresponding position of the top 2 of the absorption tower in advance, a lifting point device 31 is mounted on the inner wall of the absorption tower, the device is composed of [20 mm and 20mm thick steel plates, the mounting gap between the device and the fixing rod 34 is about 5mm, the device is used as a limiting device for lifting the upper tower body to ensure that the center of gravity of the upper tower body is not deviated, the fixing rod 34 above the lifting point device 31 is refined into a firm frame by using I16 channel steel for 8 fixing rods 34, the supporting beam 4 and the fixing rod 34 are welded with inclined supports at the positions which do not influence the lifting positions, and the fixing rod is in diagonal connection with 4 [16 channel steel to form a flower stand, so that the rigidity of the lifting frame is improved. And (4) carrying out rainproof measures on the detected 8 10T chain blocks 32, and then installing the chain blocks in place.

The working principle of the utility model is roughly as follows: cutting the tower body of the absorption tower along a defined line, wherein jump cutting (5 cm is left for each meter of cut) is adopted during cutting to avoid uneven stress, and after all cutting, a hoisting commander uniformly commands and keeps relevant scales on 8 fixing rods 34; the chain 323 is used as a mark, and a mark is made every 2 meters. When the inspection is started, the lifting height requirements of 8 points are the same every 2 meters, and the synchronous coordination of 8 chain blocks 32 is ensured; after the coordination and leveling, checking whether the scales on each column are uniformly lifted every 50mm, if not, adjusting the scales to be as high, and then continuously lifting until the scales are lifted to be slightly higher than each layer of wall board by 3-4 mm. After the size is determined, the lower part of the lifting point device 31 is welded on a fixed rod 34 by using channel steel for protection, finally, the added shell wall plate is hoisted by using a truck crane, vertically placed on an external bearing plate, moved to a typesetting installation position by using a chain block 32, and assembled by a conventional method. And (4) dismantling all temporary facilities after the wall plates are welded, and recovering the opening at the top of the tower. The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered by the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a desulfurization absorption tower top promotes structure, its characterized in that, absorption tower contain absorption tower wall (1) and divided absorption tower top (2), be equipped with a plurality of supporting beam (4) in absorption tower wall (1), be provided with in the absorption tower and promote subassembly (3), it includes to promote subassembly (3):

the fixing rods (34) are vertically arranged on the supporting beams (4), a plurality of fixing rods (34) are arranged on the fixing rods (34), the fixing rods (34) are uniformly arranged in the absorption tower in a circle mode, the top (2) of the absorption tower is provided with mounting holes (21) corresponding to the fixing rods (34), and the fixing rods (34) penetrate through the mounting holes (21); and a process for the preparation of a coating,

the lifting part of the lifting piece is connected with the top (2) of the absorption tower.

2. The desulfurization absorption tower top elevation structure according to claim 1, wherein the lifting member is a chain block (32).

3. The desulfurization absorption tower top elevation structure according to claim 1, wherein a fixing rib (35) is provided at a connection of the fixing rod (34) and the support beam (4).

4. The desulfurization absorption tower top elevation structure according to claim 1, wherein eight fixing rods (34) are provided.

5. The desulfurization absorption tower top elevation structure according to claim 4, wherein the support beam (4) is formed in ╡ ╞ type, and the fixing rods (34) are uniformly provided at the end of each beam of the support beam (4).

6. The desulfurization absorption tower top elevation structure according to claim 5, wherein the support beam (4) is an I-steel.

7. The desulfurization absorption tower top lifting structure according to claim 6, wherein the I-steel type is I25.

8. The desulfurization absorption tower top elevation structure according to claim 1, wherein a lifting point device (31) is provided at a connection of the lifting member and the absorption tower top (2).

9. The desulfurization absorption tower top elevation structure of claim 1, wherein the fixing rod (34) is a phi 219 seamless steel pipe.