CN103884200B - The indirect air cooling light-weight steel cage structure tower of anti-freezing economical can be realized - Google Patents
The indirect air cooling light-weight steel cage structure tower of anti-freezing economical can be realized Download PDFInfo
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Abstract
The present invention can realize the indirect air cooling light-weight steel cage structure tower of anti-freezing economical, belongs to cooling tower technical field, technical problem to be solved there is provided the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical, and this cooling tower is applicable to the area of water resources shortage, and antifreezing effect is remarkable, the technical scheme solving this technical problem employing is: air cooling tower body is fixedly installed on the ground, the bottom of air cooling tower body is air intake passage, the top of air cooling tower body is air duct, lower circumference along air cooling tower body is provided with a circle heat-exchanging tube bundle, one circle heat-exchanging tube bundle is formed by connecting by multiple heat-exchanging tube bundle unit head and the tail, heat exchanger tube is vertically arranged in heat-exchanging tube bundle unit, the outer wall of heat-exchanging tube bundle unit is provided with multiple heat exchange fin, recirculated water is full of in space between heat-exchanging tube bundle unit and heat exchanger tube, air duct is provided with the ventilating skylight of at least one, ventilating skylight is positioned at the bottom of air duct, the present invention can be widely used on heat power station.
Description
Technical field
The present invention can realize the indirect air cooling light-weight steel cage structure tower of anti-freezing economical, belongs to cooling tower technical field.
Background technology
Cooling tower is the visual plant of Treatment of Industrial Water, and it is widely used in many departments of national economy, as fields such as electric power, oil, chemical industry, iron and steel, building materials, is one of large main frame in thermal power plant four.
Existing industrial, especially power industry, the hyperbolic natural-draft cooling tower of use is reinforced concrete structure, and the hyperbolic natural-draft cooling tower of reinforced concrete structure has following unfavorable factor:
1, initial investment is large.Build one and be applicable to 600MW(tower height 180 meters, diameter 150 meters) investment of the hyperbolic natural-draft cooling tower of cement structures is approximately 12,000 ten thousand yuan, exceeds about 30% than same scale steel structure tower valency.
2, weight is large.Build the hyperbolic natural-draft cooling tower tower body (tower height 180 meters, diameter 150 meters) that is applicable to cold cement structures between 600MW, weight is approximately 85000 tons, owing to having huge weight, therefore also higher to the requirement of basic geology, also must drive piles base in the place that geology is comparatively loosened to improve bearing capacity, increase investment simultaneously.
3, long construction period, construction site is large.Build one and be applicable to 600MW(tower height 180 meters, diameter 150 meters) the construction time limit minimum needs of the hyperbolic natural-draft cooling tower of cement structures 18 months, must use the equipment such as large-scale tower crane in work progress, get the raw materials ready and operation etc. must have enough large place simultaneously.
Cement hyperbolic natural-draft cooling tower has above-mentioned unfavorable factor, and the use of the industrial circle of this cooling tower beyond power industry is very restricted.
Existing cooling tower is only useful in water resource than more rich area, directly contacted with air by the water in cooling tower, carry out conducting heat and evaporative heat loss, the delivered heat in water to air, though this type of cooling has low, the heat exchanger effectiveness advantages of higher of investment, disadvantage is exactly consume large water resource.
There will be freezeout in the winter of severe cold area bottom existing cooling tower in addition, the cooling tower after freezing can not normally work, and not only causes damage to equipment, but also makes a big impact to the operation of indirect air cooling system.
Summary of the invention
Instant invention overcomes the deficiency that prior art exists, provide the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical, this cooling tower is applicable to the area of water resources shortage, and antifreezing effect is remarkable.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical, comprise air cooling tower body, described air cooling tower body is fixedly installed on the ground, the bottom of described air cooling tower body is air intake passage, the top of described air cooling tower body is air duct, lower circumference along described air cooling tower body is provided with a circle heat-exchanging tube bundle, a described circle heat-exchanging tube bundle is formed by connecting by multiple heat-exchanging tube bundle unit head and the tail, described each heat-exchanging tube bundle unit includes multiple heat exchanger tube, described heat exchanger tube is vertically arranged in heat-exchanging tube bundle unit, the outer wall of described heat-exchanging tube bundle unit is provided with multiple heat exchange fin, recirculated water is full of in space between described heat-exchanging tube bundle unit and heat exchanger tube, the air intake of described heat exchanger tube is communicated with the steam drain of steam turbine, the venthole of described heat exchanger tube is communicated with the air intake of boiler, unnecessary heat is passed to recirculated water through heat exchanger tube by the exhaust steam of discharging from turbine discharge mouth, described recirculated water transfers heat to the intrinsic air of air cooling tower by heat exchange fin, the air of described air cooling tower body exterior enters in air cooling tower body by air intake passage, the top of the air of this body absorption of air cooling tower heat from air duct is discharged,
Described air duct is provided with the ventilating skylight of at least one, described ventilating skylight is positioned at the bottom of air duct, can be reduced entering the intrinsic air capacity of air cooling tower from air intake passage by unlatching ventilating skylight.
The structure of described air cooling tower body is: comprise air cooling tower basis, X post and air duct, described air cooling tower basis is reinforced concrete structure, described X post and air duct are double-layer frame steel construction, described air cooling tower basis instrument at subsurface as ground, described air cooling tower basis is provided with many pre-embedded bolts, the lower end of described X post is fixed on air cooling tower basis by pre-embedded bolt, the described upper end of X post and the lower end of air duct are fixed together, the junction of described X post and pre-embedded bolt is provided with X column base plate, and the two ends of described X column base plate are sleeved on pre-embedded bolt;
Multiple described X band of column shape is arranged on air cooling tower body interior, and described heat-exchanging tube bundle is positioned at outside X post.
The structure of described X post is: comprise the first column and the second column, and it is that X-shaped is arranged that the middle part of described first column and the second column intersects, and is fixedly connected with between the upper and lower part of the first column and the second column by head rod;
Multiple described X column annular is arranged, two adjacent X columns are fixedly connected with the 3rd connecting rod by the second connecting rod, namely be fixedly connected with by many second connecting rods between two adjacent the first columns, be fixedly connected with by many 3rd connecting rods between two adjacent the second columns.
The structure of described air duct is: comprise the different multi-turn cell of internal diameter and fix the steel frame construction built and be added together and form some layers, every coil unit lattice are formed by fixedly connecting by multiple cell head and the tail that quantity is different, and the outside of each cell is provided with deep bead;
The structure of described cell is: comprise outer column, inner column, anyhow beam, outer crossbeam, interior crossbeam, horizontal rood beam and perpendicular rood beam, outer column described in two and inner column all be arranged in parallel, two described outer columns upper, lower end is all fixedly connected with by outer crossbeam, two described inner columns upper, lower end is all fixedly connected with by interior crossbeam, the same side end of described outer crossbeam and interior crossbeam is all fixedly connected with by beam anyhow, before cell, rear side is all arranged in a crossed manner two perpendicular rood beams, upper at cell, downside is all arranged in a crossed manner two horizontal rood beams.
Described each cell is all inlayed one piece of deep bead, the outer column of described cell and outer crossbeam form a grid, described deep bead from innermost insert on grid.
Arranged outside between described adjacent deep bead has fixture, and described fixture is aluminium alloy drawing and extruding section bar, and fixing by riveted joint between described fixture and deep bead, be provided with sealing strip between described fixture and deep bead, described sealing strip is nitrile rubber.
Described air intake passage is provided with blind window, and the angular dimension opened by controlling blind window can control to enter the intrinsic air of air cooling tower from air intake passage.
Described ventilating skylight is arranged on deep bead, or described deep bead is ventilating skylight.
Described ventilating skylight to be positioned at bottom air duct third layer on layer 5 cell.
The present invention compared with prior art has following beneficial effect.
1, the whole tower of the present invention adopts built-in clad steel shelf structure, under the prerequisite ensureing tower body intensity, reduces the deadweight of tower body; Tower body outer side panel adopts lightweight material simultaneously, reduces manufacturing cost.
2, the present invention arranges adjustable ventilating skylight along air duct outer surface, environmentally temperature adjustable ventilating skylight can be opened when using in the winter time, extraneous cold air is not directly entered in tower by tube bank, mix with the hot-air in tower, the temperature of hot-air is reduced, the draft of cooling tower reduces, and prevent tube bank Yin Wendu low and freeze, these antifreezing measures cannot realize in traditional cement tower.
3, the present invention adopts heat-exchanging tube bundle to cool, recirculated water is full of in space between heat-exchanging tube bundle unit and heat exchanger tube, the air intake of heat exchanger tube is communicated with the steam drain of steam turbine, the venthole of heat exchanger tube is communicated with the air intake of boiler, unnecessary heat is passed to recirculated water through heat exchanger tube by the exhaust steam of discharging from turbine discharge mouth, recirculated water transfers heat to the intrinsic air of air cooling tower by heat exchange fin, the air of air cooling tower body exterior enters in air cooling tower body by air intake passage, the top of the air of this body absorption of air cooling tower heat from air duct is discharged, the exchange of heat is only had in whole heat transfer process, recirculated water does not lose, thus a large amount of water resources has been saved, be specially adapted to the area of lack of water.
4, the present invention have that construction cost is low, the cycle is short, the feature of lightweight, good cooling results, achieving the breakthrough of cooling tower form, technology, is a major transformation of China's cooling tower technology.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described further.
Fig. 1 is structural representation of the present invention.
Fig. 2 is top view of the present invention.
Fig. 3 is the structural representation of heat-exchanging tube bundle of the present invention.
Fig. 4 is the partial sectional view of hollow cold tower foundation of the present invention.
Fig. 5 is the top view of Fig. 4.
Fig. 6 is the floor plan of hollow cold tower foundation of the present invention.
Fig. 7 is the structural representation of X post in the present invention.
Fig. 8 is the syndeton schematic diagram in the present invention between adjacent X post.
Fig. 9 is the structural representation of cell in the present invention.
Figure 10 is the side view of cell in the present invention.
Figure 11 is the top view of cell in the present invention.
Figure 12 is the structural representation of deep bead in the present invention.
Figure 13 is the top view of deep bead in the present invention.
Figure 14 is the syndeton schematic diagram in the present invention between deep bead and fixture.
In figure, 1 is air cooling tower body, 2 is heat-exchanging tube bundle, 3 is air duct, 4 is heat-exchanging tube bundle unit, 5 is heat exchanger tube, 6 is heat exchange fin, 7 is ventilating skylight, 8 is air cooling tower basis, 9 is X post, 10 is pre-embedded bolt, 11 is X column base plate, 12 is outer column, 13 is inner column, 14 is beam anyhow, 15 is outer crossbeam, 16 is interior crossbeam, 17 is horizontal rood beam, 18 is perpendicular rood beam, 19 is the first column, 20 is the second column, 21 is head rod, 22 is the second connecting rod, 23 is the 3rd connecting rod, 24 is deep bead, 25 is fixture, 26 is sealing strip, 27 is air intake passage.
Detailed description of the invention
As shown in Fig. 1 ~ Figure 14, the present invention can realize the indirect air cooling light-weight steel cage structure tower of anti-freezing economical, comprise air cooling tower body 1, described air cooling tower body 1 is fixedly installed on the ground, the bottom of described air cooling tower body 1 is air intake passage 27, the top of described air cooling tower body 1 is air duct 3, lower circumference along described air cooling tower body 1 is provided with a circle heat-exchanging tube bundle 2, a described circle heat-exchanging tube bundle 2 is formed by connecting by multiple heat-exchanging tube bundle unit 4 head and the tail, described each heat-exchanging tube bundle unit 4 includes multiple heat exchanger tube 5, described heat exchanger tube 5 is vertically arranged in heat-exchanging tube bundle unit 4, the outer wall of described heat-exchanging tube bundle unit 4 is provided with multiple heat exchange fin 6, recirculated water is full of in space between described heat-exchanging tube bundle unit 4 and heat exchanger tube 5, the described air intake of heat exchanger tube 5 is communicated with the steam drain of steam turbine, the described venthole of heat exchanger tube 5 is communicated with the air intake of boiler, unnecessary heat is passed to recirculated water through heat exchanger tube 5 by the exhaust steam of discharging from turbine discharge mouth, described recirculated water transfers heat to the air in air cooling tower body 1 by heat exchange fin 6, the air of described air cooling tower body 1 outside enters in air cooling tower body 1 by air intake passage 27, the air absorbing heat in air cooling tower body 1 is discharged from the top of air duct 3,
Described air duct 3 is provided with the ventilating skylight 7 of at least one, described ventilating skylight 7 is positioned at the bottom of air duct 3, can reduce by opening ventilating skylight 7 air capacity entered from air intake passage 27 in air cooling tower body 1.
The structure of described air cooling tower body 1 is: comprise air cooling tower basis 8, X post 9 and air duct 3, described air cooling tower basis 8 is reinforced concrete structure, described X post 9 and air duct 3 are double-layer frame steel construction, described air cooling tower basis 8 is arranged on subsurface as ground, described air cooling tower basis 8 is provided with many pre-embedded bolts 10, the lower end of described X post 9 is fixed on air cooling tower basis 8 by pre-embedded bolt 5, the upper end of described X post 9 and the lower end of air duct 3 are fixed together, the junction of described X post 9 and pre-embedded bolt 5 is provided with X column base plate 11, the two ends of described X column base plate 11 are sleeved on pre-embedded bolt 10,
It is inner that multiple described X post 9 annular is arranged on air cooling tower body 1, and described heat-exchanging tube bundle 2 is positioned at outside X post 9.
The structure of described X post 9 is: comprise the first column 19 and the second column 20, and it is that X-shaped is arranged that the middle part of described first column 19 and the second column 20 intersects, and is fixedly connected with between the first column 19 and the upper and lower part of the second column 20 by head rod 21;
Multiple described X column 9 annular is arranged, two adjacent X columns 9 are fixedly connected with the 3rd connecting rod 23 by the second connecting rod 22, namely be fixedly connected with by many second connecting rods 22 between two adjacent the first columns 19, be fixedly connected with by many 3rd connecting rods 23 between two adjacent the second columns 20.
The structure of described air duct 3 is: comprise the different multi-turn cell of internal diameter and fix the steel frame construction built and be added together and form some layers, every coil unit lattice are formed by fixedly connecting by multiple cell head and the tail that quantity is different, and the outside of each cell is provided with deep bead 24;
The structure of described cell is: comprise outer column 12, inner column 13, anyhow beam 14, outer crossbeam 15, interior crossbeam 16, horizontal rood beam 17 and perpendicular rood beam 18, outer column 12 described in two and inner column 13 all be arranged in parallel, two described outer columns 12 upper, lower end is all fixedly connected with by outer crossbeam 15, two described inner columns 13 upper, lower end is all fixedly connected with by interior crossbeam 16, the same side end of described outer crossbeam 15 and interior crossbeam 16 is all fixedly connected with by beam 14 anyhow, before cell, rear side is all arranged in a crossed manner two perpendicular rood beams 18, upper at cell, downside is all arranged in a crossed manner two horizontal rood beams 17.
Described each cell is all inlayed one piece of deep bead 24, the outer column 12 of described cell and outer crossbeam 14 form a grid, described deep bead 24 from innermost insert on grid.
Arranged outside between described adjacent deep bead 24 has fixture 25, described fixture 25 is aluminium alloy drawing and extruding section bar, fixing by riveted joint between described fixture 25 and deep bead 24, be provided with sealing strip 26 between described fixture 25 and deep bead 24, described sealing strip 26 is nitrile rubber.
Described air intake passage 27 is provided with blind window, and the angular dimension opened by controlling blind window can control the air entered from air intake passage 27 in air cooling tower body 1.
Described ventilating skylight 7 is arranged on deep bead 24, or described deep bead 24 is ventilating skylight 7.
Described ventilating skylight 7 to be positioned at bottom air duct 3 third layer on layer 5 cell.
Be that example is described in detail below in conjunction with 600MW grade indirect air cooling steel structure tower.
(1) 600MW grade indirect air cooling steel structure tower parameter source.
The basic parameter of 600MW grade indirect air cooling steel structure tower derives from the indirect dry cooling tower of 600MW unit, and design parameter is as follows:
Be more than the parameter of traditional reinforced concrete structure, the master data on the appearance and size parameter reference of the air duct of the indirect dry cooling tower of light section steel structure in table.
(2) determination of hyperbolic steel structural tower characteristic size.
The characteristic size of the air duct of steel structure tower tower body is determined according to thermodynamic computing, after the end diameter determining air duct and height, does following work according to thermodynamic computing:
The air duct physical dimension of a, steel structure tower tower body calculates:
The air duct of the tower body of cooling stack adopts hyperbolic shape, and its equation is:
R2/a2－Y2/b2=1
The physical dimension of the air duct of hyperbolic natural-draft cooling tower, should meet following relation according to the regulation in standard GB/T/T50102-2003.Existing hyperbolic-type air duct housing physical dimension should meet:
The ratio 1.2 ~ 1.6 of diameter at the bottom of tower height and shell;
The ratio 0.30 ~ 0.40 of throat opening area and shell floor space;
Throat's height and the ratio 0.75 ~ 0.85 of tower height;
The basic parameter of b, 600MW unit indirect air cooling steel structure tower air duct:
The characteristic size of c, 600MW unit indirect dry cooling tower steel structure tower:
600MW unit indirect air cooling steel structure tower primarily of three part compositions, the air duct of the basis of steel structure tower, the X post of steel structure tower and steel structure tower.
(3) version of steel structure tower
The version of 600MW unit indirect air cooling steel structure tower is double-layer frame structure, and skin inlays the version of deep bead.Frame structure all adopts Q235B steel, and deep bead adopts aluminium alloy plate.
The air inlet of steel structure tower is designed with 50 pairs of X posts, and X post adopts combined steel structure.Annular girder is arranged at the top of X post, and annular girder hypomere connects X post, and epimere connects air duct.
The air duct partial double frame steel structure form of steel structure tower, totally 84 layers, between every layer, the spacing of panel is 1.8 meters.
Every one deck is by being uniformly distributed circumferentially as identical 150 cells, and the rod member of each cell has 7 kinds, and dissimilar rod member has different length and sectional dimension, and changes along with the change of the number of plies.
The rod member of each cell connects with bolt.The double-layer frame steel construction of steel structure tower air duct part is bearing structure, and the deep bead Main Function inlayed keeps out the wind, and ensures the draft of air cooling tower.
Being described in detail as follows of various piece:
1, the basis of steel structure tower;
The basis of steel structure tower adopts reinforced concrete structure, and the basis of steel structure tower has the pre-embedded bolt of 16 M64, for the basis of steel structure tower, by the load proposed according to the result of Mechanics Calculation on basis, and the design considerations based on this load.
Load on basis has
This basis is isolated footing, also can be ring-like, specifically be determined by designing institute.
2, the X post of steel structure tower;
The tubing of the X post φ 325 of steel structure tower combines.
3, the air duct of steel structure tower;
1. the version of air duct;
The version of 600MW unit indirect air cooling steel structure tower is double-layer frame structure, and skin inlays the version of deep bead.The air duct partial double frame steel structure form of steel structure tower, totally 84 layers, between every layer, the spacing of panel is 1.8 meters.Every one deck is by being uniformly distributed circumferentially as identical 150 cells, and the rod member of each cell has 7 kinds, and dissimilar rod member has different length and sectional dimension, and changes along with the change of the number of plies.7 kinds of rod members of each cell are respectively: outer column, inner column, anyhow beam, outer crossbeam, interior crossbeam, horizontal rood beam and perpendicular rood beam
2. deep bead;
The structure of outer deep bead is the form of inlaying, and deep bead adopts aluminium alloy plate.The thickness of panel is 2mm, on panel, extrudes the reinforcement of width 200mm height 30mm, the quantity of reinforcement 4 ~ 6 according to panel width.Outer column and outer crossbeam are embedded with the drawing and extruding section bar of aluminium alloy.Each cell inlays one piece of panel, and the outer column of cell and outer crossbeam form a grid, and panel is from innermost insert.Between aluminium alloy drawing and extruding section bar and panel, have sealing strip, the material of sealing strip adopts the nitrile rubber with good anti ageing property.The type of attachment of panel adopts riveted joint, and the spacing of pulling rivet is 100mm.
4, steel structure tower is anticorrosion;
The framework common iron processing and manufacturing of steel structure tower, steel construction under atmospheric environment acts on by sunlight, dust storm, sleet, frost and dew and temperature and humidity change throughout the year, and the oxygen wherein in air and moisture are the key factors causing outdoor iron structure to corrode.
Steel construction anticorrosion extremely important, adopt hot spray painted zinc or hot jet, additional anticorrosive coating, adopt epoxy zinc-rich paint Seal treatment, form long-effective corrosion structure, greatly can extend the service life of coating, from effect that is theoretical and practical application, spray zinc or aluminium-plated coating are the best bottoms of anticorrosive paint.Protection life-span of the composite coating of sprayed metal coating and anticorrosive paint coating comparatively both sprayed metal coating and anticorrosive paint overcoat life-span sum also to grow, be the several times in single coating protecting layer life-span.Effective protection phase generally can reach 30 ~ 40 years, the longest effective record record of existing 60 years abroad.
Metallic zinc, aluminium have the characteristic of very large atmospheric corrosion resistance.Steel component sprays zinc or the aluminium-plated matrix to steel construction has double protection, on the one hand, play physics covering effect, the corrosive medium of iron and steel and water and air is kept apart, thus plays a protective role; On the other hand, the chemical property of zinc, aluminium is relatively more active, and electrode potential is lower than steel, and in this corrosion cell, zinc, aluminium are negative pole current potentials, and iron and steel is anodic potentials, forms anode loss protection effect thus makes iron and steel substantially obtain protection.
Technical process:
Treatment of Metal Surface (place crator, burr)---cleaning (degreasing)---roughening process (sandblasting)---spray metal coating (zinc or aluminium)---brushing confining bed.
Operative norm:
Sandblasting is pressed GB/T11373-1989 and is performed, and reaches Sa3 standard;
Spray zinc (aluminium) performs by GB/T9793-1997;
Confining bed (dope layer) performs by JB/T7706-1995 or JB/T9188-1999.
Coating performance detection method:
The concrete regulation that metal coating method for testing performance is pressed in GB/T9793-1997 standard detects; 1., the bond strength of metal coating and steel matrix, adopt and draw a lattice method; 2. metal coating thickness, adopts non magnetic calibrator, and minimum local thickness should reach designing requirement.
The detection method of organic coating layer (epoxy resin layer) performs by specific requirement in Ministry of Machine-Building Industry JB/T7706-1995 or JB/T9188-1999.
Aluminium alloy drawing and extruding section bar and aluminium alloy panel adopt surface passivation preservative treatment, and aluminium is the metal that a kind of activity is very strong, is easy to be combined with oxygen, generate the fine and close hard oxide protective layer of one deck, effectively prevent aluminium to be oxidized further.
All connecting bolts adopt high-strength hot-dip zinc-coated bolt.Stainless steel bolt can be adopted at key position.
5, the antifreezing measures of steel structure tower;
The antifreeze of indirect dry cooling tower is generally come by the shutter be arranged on outside heat exchanger.For improving antifreezing effect further.Which floor of the bottom of steel construction air cooling tower air duct can reserve several ventilating skylight.When using in the winter time, ventilating skylight can be opened, cold air directly can enter air cooling tower, reduces cold air by the air quantity of heat exchanger, can indirectly play antifreeze effect.
(4) production of steel structure tower and installation;
1, the production and processing of steel structure tower;
All parts of steel structure tower all machine in factory, step: raw material supply-blanking-processing (mainly welding)--drilling-anticorrosion-inspection-finished product.
The quality control of each step and inspection;
1. raw-material quality control and inspection;
The raw material of all rod members of steel structure tower are steel and welding material, and steel all adopt material to be the steel of Q235B, welding material welding rod.
The kind, specification, performance etc. of steel should meet the requirement of existing national product standards and design;
The method of inspection: check steel product quality verification of conformity file, Chinese mark and survey report etc.
The kind, specification, performance etc. of welding material should meet the requirement of existing national product standards and design;
The method of inspection: check welding material certification of fitness prescribed paper, Chinese mark and survey report etc.
2. the baiting method of steel construction parts mainly cuts, and the dominant item of steel cutting is that cut surface is answered flawless, slag inclusion, layering and is greater than the truncation of 1mm.
The method of inspection: to observe or with magnifying glass and Centigrade scale inspection, have during doubt permeate, magnetic or ultrasonic examination inspection.
The tolerance of cutting:
| Project | Tolerance |
| Parts width, length | ±2mm |
| Edge truncation | 1.0mm |
| The perpendicularity at shaped steel top | 2.0mm |
3. the processing method of steel construction parts is mainly welded, and the dominant item of welding is: the welding materials such as a, welding rod, welding wire and solder flux mate the regulation that should meet existing professional standard " the construction steel structure solder technology code " JGJ81 of country with mother metal;
B, welder must through passing the examination and obtaining the certificate of competency, and accredited welder must welding within the scope of it passes the examination project and accreditation thereof.
C, face of weld must not have the defect such as crackle, overlap, and the I and II weld seam of requirement must not have the defects such as surface pores, slag inclusion, crater crack, arc scratch.
The method of inspection: observe and check or with magnifying glass, weld gauge and steel ruler inspection, when there is doubt, adopt infiltration, magnetic particle testing.
4. the precision of the drilling of steel construction parts is the prerequisites ensureing to install, the tolerance of bolt hole: diameter 0.0 ~+1mm; Circularity 1mm; Perpendicularity 0.03t and should not be greater than 2mm.
The tolerance (mm) of bolt hole pitch-row:
5. steel beam column (semi-finished product) appearance and size is checked and accepted
The tolerance (mm) of steel beam column appearance and size dominant item sees the following form:
6. preservative treatment: perform by specific technological process.
2, the site operation of steel structure tower;
The installation of steel structure tower be in factory processing qualified after component conveying existing to constructing, installation at the scene, construction procedure is as follows:
Installation-air duct installation-anticorrosion the reparation of based process---X post and annular girder.
The quality control of each step and inspection;
1. based process;
The basis of steel structure tower is reinforced concrete structure, must first process basis before installation, and the reinforced concrete foundation of steel structure tower is designed with pre-embedded bolt, does following process to basis:
Whether specification and the position of a, the orientation axis determining steel structure tower basis, basic axis and absolute altitude, pre-embedded bolt meet designing requirement;
The method of inspection: carry out in-site measurement with theodolite, spirit level and steel ruler.
B, regulate basic datum level,
Basis datum level is the prerequisite ensureing that steel structure tower is installed, and by designing requirement, the precision of datum level should meet following requirement:
Warp-wise deviation---1/1000; Levelness deviation ± 20.mm.
The method of inspection: carry out scene with theodolite, spirit level and steel ruler and determine.
2., the installation of X post and annular girder;
X post and annular girder are the large-scale components in steel structure tower, and use ground crane to install, form doughnut-shaped monolithic structure, annular girder top plan is regulated by the adjusting bolt on basis, and the precision of annular girder top plan should meet following requirement:
Levelness deviation ± 20.mm; Ovality≤± 1/1000.
3. the installation of air duct;
The air duct of steel structure tower totally 84 layers, every layer is divided into 150 identical lattice, every lattice 7 kinds of rod members, the substance of maximum rod member is less than 40Kg, during installation, the number according to installing installs several small winch (lifting weight 300Kg) in tower, successively installs, several artificial ladder is designed with, for installation personnel between every layer.
4. bolt connects;
All rod members of steel structure tower are all bolted, bolt adopts high-strength bolt, the regulation that executing of high strength exploitation is twisted order and just twisted, multiple screwing torque should meet the existing professional standard of designing requirement and country " design and construction of steel construction high strength exploitation and control of acceptance " JGJ82.
The pretightning force of high strength exploitation construction should meet the regulation of following table:
| M12 | M16 | M20 | M22 | M24 | M30 |
| 40kN | 75kN | 120kN | 150kN | 170kN | 270kN |
The performance rate of all high-strength bolts is 8.8 grades.
After the whole installation of steel structure tower, whole connecting bolt is rechecked.
5. the installation specification of whole tower;
Warp-wise tolerance≤± 1/500;
Squareness tolerance≤± 1/500.
6. anticorrosion defect elimination;
Anticorrosion defect elimination process is carried out to whole tower.
The present invention has unique advantage with domestic and international similar technique contrast:
(1) cost is low.This Novel cooling tower cost compared with conventional cement cooling tower can reduce by 20% ~ 50%, and building the lower area of cement tower ground material, cost can save more than 20%, in the area that ground material is somewhat expensive, can reduce investment outlay and reach 40%.
(2) lightweight.What cooling tower adopted is metal framework mosaic glass steel facing structure, metal framework structure reasonable in design has higher bulk strength, and weight reduces greatly, the own wt of this light-duty tower is about 4000 tons, about 85000 tons of the own wt of traditional cement tower, only have 1/20th of conventional cement tower, reduce the requirement of cooling tower basis to geological conditions, thus also reduce the processing cost of geology, can use in the area that geology is poor, require the bearing capacity of basic foundation, under the condition that wet shape cools, be greater than 70KPa; The condition of dry calibration is greater than 120KPa.
(3) easy construction and short construction period.The construction of this Novel tower is very convenient, different from traditional cement tower, does not need large-scale construction equipment, as sky hangs.The heaviest part of this tower is less than 40Kg.Construction site is also smaller, and having 1/10th of cement tower construction site can with construction and installation.Greatly can shorten construction period, compared with constructing with cement tower, construction period can the reduction of erection time more than 60% simultaneously.
(4) construct environment friendly and pollution-free.Dust and noise pollution is not had, construction environment-protecting clean in work progress.
(5) effective antifreezing measures.This tower can in third layer design and installation one week adjustable ventilation skylight of panel, environmentally temperature ventilating skylight can be opened when using in the winter time, extraneous cold air is directly entered in tower, mix with the hot-air in tower, the temperature of hot-air is reduced, and the draft of cooling tower reduces, and is greatly reduced by the air quantity of tube bank, preventing tube bank, Yin Wendu is low freezes, and these antifreezing measures cannot realize in traditional cement tower.
(6) frost resistance is good.
In northern frore area, Reinforced Concrete Cooling Tower runs under being in cold wet environment for a long time, and it is particularly outstanding by freeze thawing destroying infection, and the maintenance of tower cylinder is frequent, workload is large, and need stop tower maintenance, is difficult to meet continuous service requirement.And this tower adopts steel frame construction tower, the problems referred to above can be avoided to occur, therefore adopt in northern frore area steelframe tower just more applicable.
(7) aesthetic in appearance.This Novel tower adopt be glass reinforced plastic panel, the surface of panel can reach the effect of minute surface, and tower body color can make according to the requirement of user, can with environment one integrated mass, become a Greater Landscape of factory.
(8) easy to maintenance can folding is moved.Because the frame structure of air duct is interior outer double-layer structure, can be used as scaffold during installation and use, when keeping in repair at ordinary times, people is easy to reach any one position of air duct, does not need to build a framework in addition, and maintenance does not need crane.During as enterprises remove, this tower can also be removed, installation of changing places.
By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (9)
1. can realize the indirect air cooling light-weight steel cage structure tower of anti-freezing economical, it is characterized in that, comprise air cooling tower body (1), described air cooling tower body (1) is fixedly installed on the ground, the bottom of described air cooling tower body (1) is air intake passage (27), the top of described air cooling tower body (1) is air duct (3), lower circumference along described air cooling tower body (1) is provided with a circle heat-exchanging tube bundle (2), described circle heat-exchanging tube bundle (2) is formed by connecting by multiple heat-exchanging tube bundle unit (4) head and the tail, described each heat-exchanging tube bundle unit (4) includes multiple heat exchanger tube (5), described heat exchanger tube (5) is vertically arranged in heat-exchanging tube bundle unit (4), the outer wall of described heat-exchanging tube bundle unit (4) is provided with multiple heat exchange fin (6), recirculated water is full of in space between described heat-exchanging tube bundle unit (4) and heat exchanger tube (5), the air intake of described heat exchanger tube (5) is communicated with the steam drain of steam turbine, the venthole of described heat exchanger tube (5) is communicated with the air intake of boiler, unnecessary heat is passed to recirculated water through heat exchanger tube (5) by the exhaust steam of discharging from turbine discharge mouth, described recirculated water transfers heat to the air in air cooling tower body (1) by heat exchange fin (6), the air that described air cooling tower body (1) is outside enters in air cooling tower body (1) by air intake passage (27), the air absorbing heat in air cooling tower body (1) is discharged from the top of air duct (3),
Described air duct (3) is provided with the ventilating skylight (7) of at least one, described ventilating skylight (7) is positioned at the bottom of air duct (3), can reduce by opening ventilating skylight (7) air capacity entered from air intake passage (27) in air cooling tower body (1).
2. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 1, it is characterized in that, the structure of described air cooling tower body (1) is: comprise air cooling tower basis (8), X post (9) and air duct (3), described air cooling tower basis (8) is reinforced concrete structure, described X post (9) and air duct (3) are double-layer frame steel construction, described air cooling tower basis (8) is arranged on subsurface as ground, described air cooling tower basis (8) is provided with many pre-embedded bolts (10), the lower end of described X post (9) is fixed on air cooling tower basis (8) by pre-embedded bolt (10), the upper end of described X post (9) and the lower end of air duct (3) are fixed together, the junction of described X post (9) and pre-embedded bolt (10) is provided with X column base plate (11), the two ends of described X column base plate (11) are sleeved on pre-embedded bolt (10),
It is inner that multiple described X post (9) annular is arranged on air cooling tower body (1), and described heat-exchanging tube bundle (2) is positioned at X post (9) outside.
3. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 2, it is characterized in that, the structure of described X post (9) is: comprise the first column (19) and the second column (20), it is that X-shaped is arranged that the middle part of described first column (19) and the second column (20) intersects, and is fixedly connected with between the upper and lower part of the first column (19) and the second column (20) by head rod (21);
Multiple described X post (9) annular is arranged, two adjacent X posts (9) are fixedly connected with the 3rd connecting rod (23) by the second connecting rod (22), namely be fixedly connected with by many second connecting rods (22) between two adjacent the first columns (19), be fixedly connected with by many 3rd connecting rods (23) between two adjacent the second columns (20).
4. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 2, it is characterized in that, the structure of described air duct (3) is: comprise the different multi-turn cell of internal diameter and fix the steel frame construction built and be added together and form some layers, every coil unit lattice are formed by fixedly connecting by multiple cell head and the tail that quantity is different, and the outside of each cell is provided with deep bead (24);
The structure of described cell is: comprise outer column (12), inner column (13), anyhow beam (14), outer crossbeam (15), interior crossbeam (16), horizontal rood beam (17) and perpendicular rood beam (18), outer column (12) described in two and inner column (13) all be arranged in parallel, two described outer columns (12) upper, lower end is all fixedly connected with by outer crossbeam (15), two described inner columns (13) upper, lower end is all fixedly connected with by interior crossbeam (16), the same side end of described outer crossbeam (15) and interior crossbeam (16) is all fixedly connected with by beam (14) anyhow, before cell, rear side is all arranged in a crossed manner two perpendicular rood beams (18), upper at cell, downside is all arranged in a crossed manner two horizontal rood beams (17).
5. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 4, it is characterized in that, described each cell is all inlayed one piece of deep bead (24), the outer column (12) of described cell and outer crossbeam (15) composition a grid, described deep bead (24) from innermost insert on grid.
6. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 5, it is characterized in that, arranged outside between adjacent described deep bead (24) has fixture (25), described fixture (25) is aluminium alloy drawing and extruding section bar, fixing by riveted joint between described fixture (25) and deep bead (24), be provided with sealing strip (26) between described fixture (25) and deep bead (24), described sealing strip (26) is acrylonitrile-butadiene rubber.
7. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 6, it is characterized in that, (27) are provided with blind window to described air intake passage, and the angular dimension opened by controlling blind window can control the air entered from air intake passage (27) in air cooling tower body (1).
8. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 7, it is characterized in that, described ventilating skylight (7) is arranged on deep bead (24), or described deep bead (24) is ventilating skylight (7).
9. the indirect air cooling light-weight steel cage structure tower that can realize anti-freezing economical according to claim 8, is characterized in that, described ventilating skylight (7) is positioned at air duct (3) bottom third layer on layer 5 cell.
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| CN201410157472.8A CN103884200B (en) | 2014-04-16 | 2014-04-16 | The indirect air cooling light-weight steel cage structure tower of anti-freezing economical can be realized |
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| CN201410157472.8A CN103884200B (en) | 2014-04-16 | 2014-04-16 | The indirect air cooling light-weight steel cage structure tower of anti-freezing economical can be realized |
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| CN104165546B (en) * | 2014-08-14 | 2016-05-18 | 清华大学 | A kind of cooling tower save water and energy long distance control system and method for supervising thereof |
| CN104567449B (en) * | 2014-12-19 | 2016-09-14 | 北京龙源冷却技术有限公司 | Tower body draft adjusting means and indirect air cooling system |
| CN105275244B (en) * | 2015-09-01 | 2017-11-21 | 山东电力建设第一工程公司 | A kind of indirect cool tower cushion cap post localization method |
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