CN104748580B - The indirect dry cooling tower of multilamellar cooling sector and antifreeze method thereof - Google Patents
The indirect dry cooling tower of multilamellar cooling sector and antifreeze method thereof Download PDFInfo
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- CN104748580B CN104748580B CN201510120578.5A CN201510120578A CN104748580B CN 104748580 B CN104748580 B CN 104748580B CN 201510120578 A CN201510120578 A CN 201510120578A CN 104748580 B CN104748580 B CN 104748580B
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Abstract
The present invention relates to the indirect dry cooling tower of a kind of multilamellar cooling sector and antifreeze method thereof, i.e. set up the second cooling sector 1 in former cooling sector (the first cooling sector 2) upper parallel connection, form two-layer cooling sector, or the second cooling sector 1 and the 3rd cooling sector 6 is set up in parallel connection on former cooling sector, form three layers of cooling sector, it is an advantage of the invention that the resistance that can reduce indirect cool tower tube side cooling water, reduce the power consumption of circulating pump；When winter environment temperature is relatively low; cooling sector, upper strata (the second cooling sector 1) or cooling sector, intermediate layer (the 3rd cooling sector 6) can be excised; empty the cooling water in these cut cooling sectors; and open the first shutter 12 or the 3rd shutter 62 of correspondence; introduce cold air and enter in tower; reduce the draft of gravity-flow ventilation, to realize the protection antifreeze purpose in the bottom sector (the first cooling sector 2) run.
Description
Technical field
The present invention relates to a kind of indirect dry cooling tower and antifreeze method thereof, be mainly used in the cooling of steam turbine of thermal power plant condenser (main frame) cooling water or subsidiary engine cooling water it can also be used to the cooling of recirculated cooling water of the industry such as chemical industry and iron and steel.
Background technology
Compared with traditional water cooling tower, the air cooling tower water-saving result making cooling medium with air is notable.Air cooling compressor for thermal power plant's main frame or subsidiary engine cooling water temperature is referred to as indirect dry cooling tower, it it is major part in electric power plant cooling system, its working method is: after cooling water enters condenser (cooled equipment), the exhaust steam discharged with steam turbine carries out heat exchange, temperature raises and becomes the heat that high-temperature cooling water is taken away in condensation process, subsequently into indirect dry cooling tower (cooling device), heat exchange is carried out with cold air in cooling down triangle (heat transmission equipment) in tower, by air, heat is discharged from indirect dry cooling tower again, the temperature making cooling water reduces and becomes low-temperature cooling water, enter back into condenser (cooled equipment) and form the circulation of cooling water.
Indirect dry cooling tower is made up of the cooling sector that tower body, main water pipeline, main water return tube road and quantity are some, and each cooling sector includes cooling down triangle, shutter, water inlet pipe and return branch, water inlet endless tube and backwater endless tube, valve etc..Cooling triangle is generally arranged vertically on tower body bottom, if needing antifreeze cold season in winter, also can arrange shutter in each cooling triangle air inlet, cold air is adjusted through the flow of supercooling triangle and is controlled.The current distribution of indirect dry cooling tower and water temperature control to carry out in units of cooling down sector, each sector configuration cools down water for a pair and enters return branch and corresponding valve, in running, the valve closed and open in water inlet pipe and return branch, the flowing cooling down water in this sector cooling triangle can be switched off and on, it is achieved control the purpose that sector puts into and excision runs；The aperture of shutter is increased or decreased, controls the cold air flows by cooling down triangle, meet the requirement that cooling water return water temperature control and preventing freeze in winter are controlled.In design, the quantity of cooling sector is often consistent with the size of tower, and tower the biggest cooling number of sectors is the most.But, this sector is arranged, no matter quantity, is all monolayer in terms of short transverse.
In recent years, improving along with generator 's parameter and capacity increases, the overall dimensions of indirect dry cooling tower the most constantly increases.Increase, cool down the increasing number of triangle at tower body diameter and height while, the height of cooling triangle is also increasing, the height of cooling triangle has reached dimension limit at present, this manufacturing not only making equipment and installation difficulty increase, and make the resistance of indirect dry cooling tower inner cooling water increase, the lift and the power consumption that make owner's cooling water circulating pump increase, and cause the operating cost of electricity power enterprise to rise.
Cold district in the winter time, when ambient temperature is less than zero degree, the antifreezing measures of indirect air cooling tower cooler water, mainly reduce the aperture of shutter thus reduce the air capacity by cooling down triangle.In practical operation, owing to the quantity of cooling triangle is many, the highest, cooling water temperature inhomogeneities is big, and the water temperature of local is the most on the low side, makes antifreeze work encounter difficulties.After particularly generating set capacity increases, the antifreeze harder problem of indirect dry cooling tower is to solve.
Summary of the invention
It is an object of the invention to overcome that above-mentioned indirect dry cooling tower operating cost is high, the deficiency of preventing freeze in winter difficulty, it is provided that a kind of operating cost is lower, the easy indirect dry cooling tower of preventing freeze in winter and antifreeze method thereof.
nullThe object of the present invention is achieved like this: the indirect dry cooling tower of a kind of multilamellar cooling sector，By the first cooling sector、Main water pipeline、Main water return tube road、Tower body forms，First cooling sector includes the first cooling triangle、First shutter、First water inlet pipe、First return branch、First water inlet endless tube、First backwater endless tube、First inlet valve、First backwater valve，First cooling triangle is arranged vertically on tower body lower outside，It is characterized in that，On tower body height direction，The second cooling sector is set up in parallel connection，Make the second cooling fan district be positioned on the first cooling sector and form two-layer cooling sector，Second cooling sector includes the second cooling triangle、Second shutter、Second water inlet pipe、Second return branch、Second water inlet endless tube、Second backwater endless tube、Second inlet valve、Second backwater valve，The water inlet of the second cooling triangle is connected with the second water inlet endless tube and the second backwater endless tube respectively with water return outlet，Second water inlet endless tube and the second backwater endless tube are connected with main water pipeline and main water return tube road by the second water inlet pipe and the second return branch respectively，Second water inlet pipe and the second return branch are respectively provided with the second inlet valve and the second backwater valve in order to control putting into operation and excising of the second cooling sector，Or，On tower body height direction，The second cooling sector and the 3rd cooling sector are set up in parallel connection，The 3rd cooling fan district is made to be positioned on the first cooling sector、Second cooling fan district is positioned on the 3rd cooling sector and forms three floor cooling sectors altogether，Second cooling sector includes the second cooling triangle、Second shutter、Second water inlet pipe、Second return branch、Second water inlet endless tube、Second backwater endless tube、Second inlet valve、Second backwater valve，3rd cooling sector includes the 3rd cooling triangle、3rd shutter，3rd water inlet pipe、3rd return branch、3rd water inlet endless tube、3rd backwater endless tube、3rd inlet valve、3rd backwater valve，The water inlet of the second cooling triangle is connected with the second water inlet endless tube and the second backwater endless tube with water return outlet，Second water inlet endless tube and the second backwater endless tube are connected with main water pipeline and main water return tube road by the second water inlet pipe and the second return branch respectively，Second water inlet pipe and the second return branch are respectively provided with the second inlet valve and the second backwater valve in order to control putting into operation and excising of the second sector，The water inlet of the 3rd cooling triangle is connected with the 3rd water inlet endless tube and the 3rd backwater endless tube respectively with water return outlet，3rd water inlet endless tube and the 3rd backwater endless tube are connected with main water pipeline and main water return tube road by the 3rd water inlet pipe and the 3rd return branch respectively，Also the 3rd inlet valve and the 3rd backwater valve it is respectively provided with in order to control putting into operation and excising of the 3rd cooling sector on 3rd water inlet pipe and the 3rd return branch.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, the second described cooling triangle includes the second cooling column, the second upper header, the second lower collecting box, the second triangle-frame, second lower collecting box arranges water inlet and water return outlet, second cooling column quantity of every second cooling triangle is two, and it is arranged to triangle, angle between second cooling column is acute angle, is arranged in tower body bottom with vertical in form.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, the 3rd described cooling triangle includes the 3rd cooling column, the 3rd upper header, the 3rd lower collecting box, the 3rd triangle-frame, 3rd lower collecting box arranges water inlet and water return outlet, 3rd cooling column quantity of every the 3rd cooling triangle is two, and it is arranged to triangle, angle between 3rd cooling column is acute angle, is arranged in tower body bottom with vertical in form.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, arranges the second shutter that multiple second cooling trigonometric sum is corresponding in the second described cooling sector, the second shutter is arranged at the air intake of the second cooling triangle.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, arranges the 3rd shutter that multiple 3rd cooling trigonometric sum is corresponding in the 3rd described cooling sector, the 3rd shutter is arranged at the air intake of the 3rd cooling triangle.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, the second described cooling number of sectors is multiple, is arranged in parallel between the second cooling sector, and the operation of each second cooling sector, excision control to be separate.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, the 3rd described cooling number of sectors is multiple, is arranged in parallel between the 3rd cooling sector, and the operation of each 3rd cooling sector, excision control to be separate.
The indirect dry cooling tower of multilamellar of the present invention cooling sector, water inlet and the water return outlet of the second described cooling triangle can also be connected with the second water inlet endless tube and the second backwater endless tube by the second connection pipeline respectively.
nullThe antifreeze method of the indirect dry cooling tower of a kind of multilamellar of present invention cooling sector，By the first cooling sector、Main water pipeline、Main water return tube road、Tower body forms，In the short transverse of tower body，Set up the second cooling sector，Make the second cooling sector on the first cooling sector，Second cooling sector includes the second cooling triangle、Second shutter、Second water inlet pipe、Second return branch、Second water inlet endless tube、Second backwater endless tube、Second inlet valve、Second backwater valve，The water inlet of the second cooling triangle is connected with the second water inlet endless tube and the second backwater endless tube respectively with water return outlet，Second water inlet endless tube and the second backwater endless tube are connected with main water pipeline and main water return tube road by the second water inlet pipe and the second return branch respectively，Second water inlet pipe and the second return branch are respectively provided with the second inlet valve and the second backwater valve to control putting into operation and excising of the second sector，By stopping the second cooling sector cooling water running、Open the second shutter of the second cooling sector，The gravity-flow ventilation draft introducing cold air reduction tower in tower carries out antifreeze control，Or，In the short transverse of tower body，Set up the second cooling sector and the 3rd cooling sector，Make the second cooling sector on the 3rd cooling sector、3rd cooling sector is on the first cooling sector，Second cooling sector includes the second cooling triangle、Second shutter、Second water inlet pipe、Second return branch、Second water inlet endless tube、Second backwater endless tube、Second inlet valve、Second backwater valve，3rd cooling sector includes the 3rd cooling triangle、3rd shutter，3rd water inlet pipe、3rd return branch、3rd water inlet endless tube、3rd backwater endless tube、3rd inlet valve、3rd backwater valve，The water inlet of the second cooling triangle is connected with the second water inlet endless tube and the second backwater endless tube respectively with water return outlet，Second water inlet endless tube and the second backwater endless tube are connected with main water pipeline and main water return tube road by the second water inlet pipe and the second return branch respectively，Second water inlet pipe and the second return branch are respectively provided with the second inlet valve and the second backwater valve in order to control putting into operation and excising of the second sector，The water inlet of the 3rd cooling triangle is connected with the 3rd water inlet endless tube and the 3rd backwater endless tube respectively with water return outlet，3rd water inlet endless tube and the 3rd backwater endless tube are connected with main water pipeline and main water return tube road by the 3rd water inlet pipe and the 3rd return branch respectively，The 3rd inlet valve and the 3rd backwater valve it is respectively provided with in order to control putting into operation and excising of the 3rd cooling sector on 3rd water inlet pipe and the 3rd return branch，By stopping the second cooling sector cooling water running、Open the second shutter of the second cooling sector，The gravity-flow ventilation draft introducing cold air reduction tower in tower carries out antifreeze control，Or by stopping the 3rd cooling sector cooling water running、Open the 3rd shutter of the 3rd cooling sector，The gravity-flow ventilation draft introducing cold air reduction tower in tower carries out antifreeze control.
The antifreeze method of the indirect dry cooling tower of multilamellar of the present invention cooling sector, arranges the second shutter that multiple second cooling trigonometric sum is corresponding in the second described cooling sector, the second shutter is arranged at the air intake of the second cooling triangle.
The antifreeze method of the indirect dry cooling tower of multilamellar of the present invention cooling sector, arranges the 3rd shutter that multiple 3rd cooling trigonometric sum is corresponding in the 3rd described cooling sector, the 3rd shutter is arranged at the air intake of the 3rd cooling triangle.
The antifreeze method of the indirect dry cooling tower of multilamellar of the present invention cooling sector, the second described cooling number of sectors is multiple, is arranged in parallel between the second cooling sector, and the operation of each second cooling sector, excision control to be separate.
The antifreeze method of the indirect dry cooling tower of multilamellar of the present invention cooling sector, the 3rd described cooling number of sectors is multiple, is arranged in parallel between the 3rd cooling sector, and the operation of each 3rd cooling sector, excision control to be separate.
Compared with prior art, the method have the advantages that
The indirect dry cooling tower of a kind of multilamellar of present invention cooling sector and antifreeze method thereof, it can overcome the deficiency that former indirect dry cooling tower operating cost is high, preventing freeze in winter is difficult, reducing the resistance of indirect cool tower tube side cooling water, reduce the power consumption of circulating pump, its operating cost is lower, preventing freeze in winter is easier to.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the indirect dry cooling tower embodiment 1 of multilamellar of the present invention cooling sector.
Fig. 2 is that the indirect dry cooling tower embodiment 1 of multilamellar of the present invention cooling sector cools down the elevational view of triangle.
Fig. 3 is that the indirect dry cooling tower embodiment 1 of multilamellar of the present invention cooling sector cools down the top view of triangle.
Fig. 4 a and Fig. 4 b is the pipeline connection diagram of the indirect dry cooling tower embodiment 1 of multilamellar of the present invention cooling sector.
Fig. 5 is the indirect dry cooling tower applicating flow chart in electricity generation system of multilamellar of the present invention cooling sector.
Fig. 6 is the schematic diagram of the indirect dry cooling tower embodiment 2 of multilamellar of the present invention cooling sector.
Fig. 7 is the pipeline connection diagram of the indirect dry cooling tower embodiment 2 of multilamellar of the present invention cooling sector.
Wherein:
Second cooling sector 1, a cooling sector 1-1, No. two cooling sector 1-2, No. three cooling sector 1-3, No. four cooling sector 1-4, No. five cooling sector 1-5, No. six cooling sector 1-6, the first cooling sector 2, No. seven cooling sector 2-1, No. eight cooling sector 2-2, No. nine cooling sector 2-3, No. ten cooling sector 2-4, ride on Bus No. 11 cooling sector 2-5, ten No. two cooling sector 2-6, main water pipeline 3, main water return tube road 4, tower body 5, the 3rd cooling sector 6, cooling water circulating pump 7, condenser 8, steam turbine 9；
Second cooling triangle 11, the second cooling column 11-1, the second upper header 11-2, second lower collecting box 11-3, the second triangle-frame 11-4, water inlet 11-5, outlet 11-6, second shutter 12, the second return branch 13, the second water inlet pipe 14, second water inlet endless tube 15, second backwater endless tube 16, the second backwater valve 17, the second inlet valve 18；Second connecting tube 19；
First cooling triangle 21, the first cooling column 21-1, the first upper header 21-2, first lower collecting box 21-3, the first triangle-frame 21-4, water inlet 21-5, outlet 21-6, first shutter 22, the first return branch 23, the first water inlet pipe 24, first water inlet endless tube 25, first backwater endless tube 26, the first backwater valve 27, the first inlet valve 28；
3rd cooling triangle 61, the 3rd cooling column 61-1, the 3rd upper header 61-2,3rd lower collecting box 61-3, the 3rd triangle-frame 61-4, water inlet 61-5, outlet 61-6,3rd shutter 62, the 3rd return branch 63, the 3rd water inlet pipe 64,3rd water inlet endless tube 65,3rd backwater endless tube 66, the 3rd backwater valve 67, the 3rd inlet valve 68.
Detailed description of the invention
Embodiment 1:
See Fig. 1, the indirect dry cooling tower of a kind of multilamellar of present invention cooling sector, two-layer cool down sector (second cooling sector 1 and the first cooling sector 2), main water pipeline 3, main water return tube road 4 and tower body 5 and form.The first cooling sector 2 and the second cooling sector 1 in figure all represent with the rectangle of double dot dash line, the method is mainly characterized in that and add the second cooling sector 1 on the first cooling sector 2, and the second cooling sector 1 is arranged in parallel with the first cooling sector 2；That is: the first cooling sector 2 is connected with main water pipeline 3 and main water return tube road 4 with the first return branch 23 respectively by the first water inlet pipe 24, similarly, second cools down sector 1 is connected with supervisor's inlet channel 3 and main water return tube road 4 with the second return branch 13 respectively also by the second water inlet pipe 14, and cooling sector, upper strata (the second cooling sector 1) and bottom cooling sector (the first cooling sector 2) parallel connection are supplied water and main water return tube road 4 backwater by main water pipeline 3.
First cooling sector 2 includes first cooling triangle the 21, first shutter the 22, first water inlet pipe the 24, first return branch 23, first water inlet endless tube the 25, first backwater endless tube 26 and the first inlet valve 28 being arranged on the first water inlet pipe 24 and the first backwater valve 27 being arranged in the first return branch 23；The the second cooling sector 1 set up includes second cooling triangle the 11, second shutter the 12, second water inlet pipe the 14, second return branch 13, second water inlet endless tube the 15, second backwater endless tube 16 and the second inlet valve 18 being arranged on the second water inlet pipe 14 and the second backwater valve 17 being arranged in the second return branch 13.
On the basis of the second cooling sector 1 and the first cooling sector 2 are arranged in parallel, second cooling sector 1 is configured with second inlet valve the 18, second backwater valve 17, it is configured with first inlet valve the 28, first backwater valve 27 similar to the first cooling sector, make the putting into operation of cooling sector, upper strata (second cooling sector 1) and bottom cooling sector (the first cooling sector 2), excise separate, control is independent of each other.It is configured with the first shutter 22 at the first cooling triangle 21 air intake of the first cooling sector 2, the second shutter 12 is also provided at the second cooling triangle 11 air intake of the second cooling sector 1, it is separate that first shutter 22 and the second shutter 12 regulate process, and during this also makes to run, the first cooling water temperature cooling down sector 2 and the second cooling sector 1 regulates separate.
Utilize the arrangement form on this upper strata and the two-layer cooling sector of bottom, the method having invented another kind of indirect dry cooling tower preventing freeze in winter.When winter environment temperature is less than zero degree, owing to ambient temperature is relatively low, heat transfer temperature difference increases, heat exchange area can be reduced, upper strata is cooled down the second inlet valve 18 of sector (second cooling sector 1) and the second backwater valve 17 is closed, cooling water (the cooling water in the i.e. second cooling triangle 11, in the second water inlet endless tube 15 and the second backwater endless tube 16, in the second water inlet pipe 14 and the second return branch 13) in this sector is drained, opening the second shutter 12 again makes cold air outside tower body 5 enter in tower, causes the temperature of air in tower to reduce；Owing to the air draft of gravity-flow ventilation tower is relevant to Inside Air Temperature (or density); along with in tower, temperature reduces; the natural draft of tower will decline; this will make will be reduced by the cold air amount of bottom sector (the first cooling sector 2) the first cooling triangle 21, reach to protect the antifreeze purpose in the bottom cooling sector run.
Fig. 2 and Fig. 3 is the first cooling triangle 21 and the elevation of the second cooling triangle 11 and top view respectively, illustrates the assembly relation of each parts.First cooling triangle 21 and the second cooling triangle 11 all use Fig. 2 and Fig. 3 explanation.
Seeing Fig. 2, the first cooling triangle 21 includes the first cooling column 21-1, the first upper header 21-2, the first lower collecting box 21-3, the first triangle-frame 21-4；First cooling column 21-1 bottom meets the first lower collecting box 21-3, top meets the first upper header 21-2, and the first lower collecting box 21-3 is provided with water inlet 21-5 and water return outlet 21-6.Second cooling triangle 11 is as the composition of the first cooling triangle 21, including the second cooling column 11-1, the second upper header 11-2, the second lower collecting box 11-3 and the second triangle-frame 11-4；Second cooling column 11-1 bottom meets the second lower collecting box 11-3, top meets the second upper header 11-2, and the second lower collecting box 11-3 is provided with water inlet 11-5 and water return outlet 11-6.
See that Fig. 3 first cools down triangle 21 and the top view of the second cooling triangle 11.It can be seen that the first cooling triangle 21 and the second cooling triangle 11 have two cooling columns (the first cooling column 21-1 or the second cooling column 11-1), cooling column is with triangular arrangement, and both angles are acute angle.
Fig. 4 a, Fig. 4 b are the first cooling sector 2(bottom cooling sectors) and the second cooling cooling sector, 1(upper strata, sector) corresponding to the first cooling triangle 21 and the second cooling triangle 11 and main water pipeline 3 and the connection figure in main water return tube road 4 and current schematic diagram.
First illustrate as a example by Fig. 4 a.The water inlet of the first lower collecting box 21-3 of the first cooling triangle 21 connects the first water inlet endless tube 25, the water return outlet of the first lower collecting box 21-3 connects the first backwater endless tube 26, and the first water inlet endless tube 25 is connected with main water pipeline 3 and main water return tube road 4 with first return branch the 23, first backwater valve 27 by first water inlet pipe the 24, first inlet valve 28 respectively with the first backwater endless tube 26.Current from main water pipeline 3 after the first water inlet pipe 24 enters the first water inlet endless tube 25, distributed by the first water inlet endless tube 25, the first cooling triangle 21-1 is entered by the water inlet of the first lower collecting box 21-3, flow downward after current direction the up to first upper header 21-2, again through the water return outlet of the first lower collecting box 21-3, enter the first backwater endless tube 26, return to main water return tube road 4, finally send outside indirect cool tower by the first return branch 23.Similar to the first cooling sector 1, the water inlet of the second lower collecting box 11-3 of the second cooling triangle 11 connects the second water inlet endless tube 15, the water return outlet of the second lower collecting box 11-3 connects the second backwater endless tube 16, second water inlet endless tube 15 is connected with main water pipeline 3 and main water return tube road 4 with the second return branch 13 by the second water inlet pipe 14 respectively with the second backwater endless tube 16, and the second water inlet pipe 14 and the second return branch 13 are respectively provided with the second inlet valve 18 and the second backwater valve 17.Current pass through the second water inlet pipe 14 from main water pipeline 3, it is introduced into the second water inlet endless tube 15, second water inlet endless tube 15 has each second cooling triangle 11 in this sector and distributes the effect of discharge, the water inlet of the second lower collecting box 11-3 is first passed through from the second water inlet endless tube 15, enter the second cooling triangle 11 and after heat exchange makes cooling water temperature, water return outlet from the second lower collecting box 11-3 enters the second backwater endless tube 16 again, flows into main water return tube road 4 finally by the second return branch 13.
From Fig. 4 a it can be seen that the second cooling sector 1 and the first cooling sector 2 are parallel relationship, all supplied water by main water pipeline 3 and by main water return tube road 4 backwater.
Connected mode shown in Fig. 4 b is connected with the first water inlet endless tube 15 and the first backwater endless tube 16 by the second connecting tube 19 respectively with the water inlet being a difference in that the second lower collecting box 11-3 and the water return outlet of Fig. 4 a, rather than being directly connected to as represented by Fig. 4 a, the cooling water flow path of Fig. 4 b is identical with Fig. 4 a's, and other connection is the most identical.
Fig. 5 is the flow chart that present example 1 is applied at Steam Turbine in Fire Power Plant cooling water system.Shown in figure, cooling water system includes multilamellar cooling fan district of the present invention indirect dry cooling tower, cooling water circulating pump 7, condenser 8, steam turbine 9 and main water pipeline 3 and main water return tube road 4.Shown herein as the embodiment of the present invention 1 have the first cooling sector 2(bottom cooling sector) 6, be No. seven cooling sector 2-1, No. eight cooling sector 2-2, No. nine cooling sector 2-3, No. ten cooling sector 2-4, ride on Bus No. 11s cooling sector 2-5 and ten No. two cooling sector 2-6 respectively；Have the second cooling sector, 1(upper strata, cooling sector) 6, it is a cooling sector 1-1, No. two cooling sector 1-2, No. three cooling sector 1-3, No. four cooling sector 1-4, No. five cooling sector 1-5 and No. six cooling sector 1-6 respectively；, all for being arranged in parallel, all supplied water by main water pipeline 3 and by main water return tube road 4 backwater in all cooling sectors (totally 12).
The composition of each first cooling sector 2 is identical, illustrate as a example by No. seven cooling sector 2-1: this sector is that bottom cools down sector, including multiple first cooling triangle 21 and the first corresponding shutters 22, first water inlet endless tube the 25, first backwater endless tube the 26, first water inlet pipe the 24, first inlet valve the 28, first return branch 23, first backwater valve 27 of each.Each cooling triangle 21 is connected with the first water inlet endless tube 25 and the first backwater endless tube 26, and the first water inlet endless tube 25 and the first backwater endless tube 26 are connected with main water pipeline 3 and main water return tube road 4 respectively through the first water inlet pipe 24 and the first return branch 23.
Each second cooling cooling sector, 1(upper strata, sector) composition the most identical, to first cooling sector 2 similar.Illustrate as a example by a cooling sector 1-1: this sector is positioned on No. seven cooling sector 2-1, including multiple second cooling triangle 11 and the second corresponding shutters 12, second water inlet endless tube the 15, second backwater endless tube the 16, second water inlet pipe the 14, second inlet valve the 18, second return branch 13, second backwater valve 17 of each.Each cooling triangle 11 is connected with the second water inlet endless tube 15 and the second backwater endless tube 16, and the second water inlet endless tube 15 and the second backwater endless tube 16 are connected with main water pipeline 3 and main water return tube road 4 respectively through the second water inlet pipe 14 and the second return branch 13.
From figure 5 it can be seen that the second cooling sector 2 and the first cooling sector 1 are parallel relationship, also it is parallel relationship between each second cooling sector 1.
Indirect dry cooling tower is the temperature reducing high-temperature cooling water in the effect of cooling system of thermal power plant so that it is becomes low-temperature cooling water and returns, and the heat in cooling water is discharged outside tower.First, cooling water enters in condenser 8 from main water return tube road 4, and the steam discharged with steam turbine 9 carries out heat exchange, and while steam condensation is water, cooling water temperature raises, then under the effect of cooling water circulating pump 7, main water pipeline 3 enters in indirect dry cooling tower.Then, the main water pipeline 3 arranged ringwise in tower is to each first cooling sector 2 and each second cooling sector 1 parallel pumping；Cooling water enters the first water inlet endless tube 25 and the second water inlet endless tube 15 through the first water inlet pipe 24 and the second water inlet pipe 14 respectively, enter back into the first cooling triangle 21 and the second cooling triangle 11, after carrying out heat exchange cooling with cool exterior air in the first cooling triangle 2 and the second cooling triangle 1, cooling water in first cooling sector 2 enters main water return tube road 4 through the first backwater endless tube 26 and the first return branch 23, cooling water in second cooling sector 1 through the second backwater endless tube 16 and the second return branch 13 also into main water return tube road 4, finally, cooling water is sent indirect dry cooling tower by main water return tube road 4 and is entered again condenser 8, complete a circulation of cooling water flow path.
When ambient temperature is less than zero degree in the winter time, indirect dry cooling tower needs to take anti-frost protection measure.In this application, the antifreeze method of the present invention is: the second inlet valve 18 and the second flowing water Valve 17 that upper strata cools down the part or all of sector of sector (No. one to No. six cooling sector) are closed, again be turned off in the sector corresponding to valve all (in the second cooling triangle 11, in second water inlet endless tube 15 and the second backwater endless tube 16, in second water inlet pipe 14 and the second return branch 13) cooling water drainage sky, open these the second shutters 12 having emptied the second cooling triangle 11, introduce the outer cold air of tower and enter in tower, the natural draft making indirect cool tower declines, reduce by bottom cooling sector (the first cooling sector 2) the first cooling triangle 21 cold air flows, reach to protect the antifreeze purpose of bottom sector (the first cooling sector 2).
Embodiment 2:
See Fig. 6, be another embodiment different from embodiment 1.This example is three layers of cooling sector form, the most in the height direction, in the first cooling sector 2(bottom cooling sector) on parallel connection be additionally arranged the second cooling sector, 1(upper strata, cooling sector) and the 3rd cooling cooling sector, 6(intermediate layer, sector), make the 3rd cooling sector 6 be positioned under the second cooling sector 1 and cool down on sector 2 with first.
The composition of the first cooling sector 2 and the second cooling sector 1 is same as in Example 1.3rd cooling sector includes the 3rd cooling tube bundle the 61, the 3rd shutter the 62, the 3rd return branch the 63, the 3rd water inlet pipe the 64, the 3rd water inlet endless tube the 65, the 3rd backwater endless tube the 66, the 3rd backwater valve 67 and the 3rd inlet valve 68.The water inlet of the 3rd cooling triangle 61 of the 3rd cooling sector 6 is connected with the 3rd water inlet endless tube the 65, the 3rd backwater endless tube 66 respectively with water return outlet, and the 3rd water inlet endless tube the 65, the 3rd backwater endless tube 66 is connected with main water pipeline 3 and main water return tube road 4 with the 3rd return branch 63 through the 3rd water inlet pipe 64 respectively.3rd cooling sector 6 and the first cooling sector 2 and the second cooling sector 1 are all intake by main water pipeline 3 and by main water return tube road 4 backwater.
The composition of the 3rd cooling triangle 61 and the assembly relation of each parts are shown in Fig. 2 and Fig. 3, also identical with the first cooling triangle 21 and the second cooling triangle 11.
When ambient temperature is low in the winter time, if desired for anti-frost protection, close the second inlet valve 18 and the second backwater valve 17, cooling water in emptying the second cooling sector 1, open the second shutter 12 of correspondence, import the cold air outside tower and enter in tower, or, close the 3rd inlet valve 68 and the 3rd backwater valve 67, empty the cooling water in the 3rd cooling sector 6, open stopped transport the 3rd cooling cooling sector, 6(intermediate layer, sector) the 3rd shutter 62, import cold air from the 3rd cooling sector 6 to enter, both can reduce indirect cool tower gravity-flow ventilation draft, realize bottom and the anti-frost protection of cooling sector, intermediate layer.
Fig. 7 is the first cooling sector 2(bottom cooling sector), the second cooling cooling sector, 1(upper strata, sector) and the 3rd cooling cooling sector, 6(intermediate layer, sector) corresponding to the first cooling triangle 21, second cool down triangle 11 and the 3rd cooling triangle 61 and main water pipeline 3 and the connection figure in main water return tube road 4 and current schematic diagram.
First cooling triangle 21 and the second cooling triangle 11 and main water pipeline 3 and the connection in main water return tube road 4 and water (flow) direction are same as in Example 1.
Similar to the first cooling triangle 21 and the second cooling triangle 11, the water inlet of the 3rd cooling triangle 61 the 3rd lower collecting box 61-3 connects the 3rd water inlet endless tube 65, the water return outlet of the 3rd lower collecting box 61-3 connects the 3rd backwater endless tube 66, and the 3rd water inlet endless tube 65 is connected with main water pipeline 3 and main water return tube road 4 with the 3rd return branch the 63, the 3rd backwater valve 67 respectively through the 3rd water inlet pipe the 64, the 3rd inlet valve 68 with the 3rd backwater endless tube 66.Current from main water pipeline 3 through the 3rd water inlet pipe 64 is in parallel enter the 3rd water inlet endless tube 65 after, distribute through the 3rd water inlet endless tube 65, the 3rd cooling triangle 61-1 is entered by the water inlet of the 3rd lower collecting box 61-3, flow downward after current direction the up to the 3rd upper header 61-2, again through the water return outlet of the 3rd lower collecting box 61-3, enter the 3rd backwater endless tube 66, flow into main water return tube road 4 by the 3rd return branch 63, finally send outside indirect cool tower.
Claims (13)
- null1. the indirect dry cooling tower of a multilamellar cooling sector，By the first cooling sector (2)、Main water pipeline (3)、Main water return tube road (4)、Tower body (5) forms，First cooling sector (2) includes the first cooling triangle (21)、First shutter (22)、First water inlet pipe (24)、First return branch (23)、First water inlet endless tube (25)、First backwater endless tube (26)、First inlet valve (28)、First backwater valve (27)，First cooling triangle (21) is arranged vertically on tower body (5) lower outside，It is characterized in that: on tower body height direction，The second cooling sector (1) is set up in parallel connection，Make the second cooling sector (1) be positioned on the first cooling sector (2) and form two-layer cooling sector，Second cooling sector (1) includes the second cooling triangle (11)、Second shutter (12)、Second water inlet pipe (14)、Second return branch (13)、Second water inlet endless tube (15)、Second backwater endless tube (16)、Second inlet valve (18)、Second backwater valve (17)，The water inlet of the second cooling triangle (11) is connected with the second water inlet endless tube (15) and the second backwater endless tube (16) respectively with water return outlet，Second water inlet endless tube (15) is connected with main water pipeline (3) and main water return tube road (4) with the second return branch (13) by the second water inlet pipe (14) respectively with the second backwater endless tube (16)，Second water inlet pipe (14) and the second return branch (13) are respectively provided with the second inlet valve (18) and the second backwater valve (17) in order to control putting into operation and excising of the second cooling sector (1)，nullOr，On tower body height direction，The second cooling sector (1) and the 3rd cooling sector (6) are set up in parallel connection，The 3rd cooling sector (6) is made to be positioned on the first cooling sector (2)、Second cooling sector (1) is positioned on the 3rd cooling sector (6) and forms three layers of cooling sector altogether，Second cooling sector (1) includes the second cooling triangle (11)、Second shutter (12)、Second water inlet pipe (14)、Second return branch (13)、Second water inlet endless tube (15)、Second backwater endless tube (16)、Second inlet valve (18)、Second backwater valve (17)，3rd cooling sector (6) includes the 3rd cooling triangle (61)、3rd shutter (62)，3rd water inlet pipe (64)、3rd return branch (63)、3rd water inlet endless tube (65)、3rd backwater endless tube (66)、3rd inlet valve (68)、3rd backwater valve (67)，The water inlet of the second cooling triangle (11) is connected with the second water inlet endless tube (15) and the second backwater endless tube (16) respectively with water return outlet，Second water inlet endless tube (15) is connected with main water pipeline (3) and main water return tube road (4) road with the second return branch (13) by the second water inlet pipe (14) respectively with the second backwater endless tube (16)，Second water inlet pipe (14) and the second return branch (13) are respectively provided with the second inlet valve (18) and the second backwater valve (17) in order to control putting into operation and excising of the second sector (1)，The water inlet of the 3rd cooling triangle (61) is connected with the 3rd water inlet endless tube (65) and the 3rd backwater endless tube (66) respectively with water return outlet，3rd water inlet endless tube (65) is connected with main water pipeline (3) and main water return tube road (4) with the 3rd return branch (63) by the 3rd water inlet pipe (64) respectively with the 3rd backwater endless tube (66)，The 3rd inlet valve (68) and the 3rd backwater valve (67) it is respectively provided with in order to control putting into operation and excising of the 3rd cooling sector (6) on 3rd water inlet pipe (64) and the 3rd return branch (63).
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterized in that: the second described cooling triangle (11) includes the second cooling column (11-1), second upper header (11-2), second lower collecting box (11-3), second triangle-frame (11-4), second lower collecting box (11-3) arranges water inlet (11-5) and water return outlet (11-6), second cooling column (11-1) quantity of every second cooling triangle (11) is two, and it is arranged to triangle, angle between second cooling column (11-1) is acute angle, it is arranged in tower body (5) bottom with vertical in form.
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterized in that: the 3rd described cooling triangle (61) includes the 3rd cooling column (61-1), 3rd upper header (61-2), 3rd lower collecting box (61-3), 3rd triangle-frame (61-4), 3rd lower collecting box (61-3) arranges water inlet (61-5) and water return outlet (61-6), every the 3rd cooling triangle (6) the 3rd cooling column (61-1) quantity is two, and it is arranged to triangle, angle between 3rd cooling column (61-1) is acute angle, it is arranged in tower body bottom with vertical in form.
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterized in that: arranging multiple second cooling triangle (11) and corresponding the second shutter (12) in the second described cooling sector (1), the second shutter (12) is arranged at the air intake of the second cooling triangle (11).
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterized in that: arranging multiple 3rd cooling triangle (61) and the 3rd corresponding shutter (62) in the 3rd described cooling sector (6), the 3rd shutter (62) is arranged at the air intake of the 3rd cooling triangle (61).
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterized in that: the second described cooling sector (1) quantity is multiple, being arranged in parallel between multiple second coolings sector (1), the operation of each second cooling sector, excision control to be mutually independent.
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterized in that: the 3rd described cooling sector (6) quantity is multiple, being arranged in parallel between multiple 3rd coolings sector (6), the operation of each 3rd cooling sector (6), excision control to be separate.
- The indirect dry cooling tower of a kind of multilamellar the most according to claim 1 cooling sector, it is characterised in that: the water inlet of the second cooling triangle (11) is connected with the second water inlet endless tube (15) and the second backwater endless tube (16) by the second connecting tube (19) respectively with water return outlet.
- null9. the antifreeze method of the indirect dry cooling tower of a multilamellar cooling sector，By the first cooling sector (2)、Main water pipeline (3)、Main water return tube road (4)、Tower body (5) forms，It is characterized in that: in the short transverse of tower body (5)，Set up the second cooling sector (1)，Make the second cooling sector (1) in the first cooling sector (2)，Second cooling sector (1) includes the second cooling triangle (11)、Second shutter (12)、Second water inlet pipe (14)、Second return branch (13)、Second water inlet endless tube (15)、Second backwater endless tube (16)、Second inlet valve (18)、Second backwater valve (17)，The water inlet of the second cooling triangle (11) is connected with the second water inlet endless tube (15) and the second backwater endless tube (16) respectively with water return outlet，Second water inlet endless tube (15) is connected with main water pipeline (3) and main water return tube road (4) with the second return branch (13) by the second water inlet pipe (14) respectively with the second backwater endless tube (16)，Second water inlet pipe (14) and the second return branch (13) are respectively provided with the second inlet valve (18) and the second backwater valve (17) to control putting into operation and excising of the second cooling sector (1)，By stopping the second cooling sector (1) cooling water running、Open second shutter (12) of the second cooling sector (1)，The gravity-flow ventilation draft introducing cold air reduction tower in tower carries out antifreeze control，Or，In the short transverse of tower body (5)，Set up the second cooling sector (1) and the 3rd cooling sector (6)，Make the second cooling sector (1) in the 3rd cooling sector (6)、3rd cooling sector (6) is in the first cooling sector (2)，Second cooling sector (1) includes the second cooling triangle (11)、Second shutter (12)、Second water inlet pipe (14)、Second return branch (13)、Second water inlet endless tube (15)、Second backwater endless tube (16)、Second inlet valve (18)、Second backwater valve (17)，3rd cooling sector (6) includes the 3rd cooling triangle (61)、3rd shutter (62)，3rd water inlet pipe (64)、3rd return branch (63)、3rd water inlet endless tube (65)、3rd backwater endless tube (66)、3rd inlet valve (68)、3rd backwater valve (67)，The water inlet of the second cooling triangle (11) is connected with the second water inlet endless tube (15) and the second backwater endless tube (16) respectively with water return outlet，Second water inlet endless tube (15) is connected with main water pipeline (3) and main water return tube road (4) with the second return branch (13) by the second water inlet pipe (14) respectively with the second backwater endless tube (16)，Second water inlet pipe (14) and the second return branch (13) are respectively provided with the second inlet valve (18) and the second backwater valve (17) in order to control putting into operation and excising of the second sector (1)，The water inlet of the 3rd cooling triangle (61) is connected with the 3rd water inlet endless tube (65) and the 3rd backwater endless tube (66) respectively with water return outlet，3rd water inlet endless tube (65) is connected with main water pipeline (3) and main water return tube road (4) with the 3rd return branch (63) by the 3rd water inlet pipe (64) respectively with the 3rd backwater endless tube (66)，The 3rd inlet valve (68) and the 3rd backwater valve (67) it is respectively provided with in order to control putting into operation and excising of the 3rd cooling sector (6) on 3rd water inlet pipe (64) and the 3rd return branch (63)，By stopping the second cooling sector (1) cooling water running、Open second shutter (12) of the second cooling sector (1)，The gravity-flow ventilation draft introducing cold air reduction tower in tower carries out antifreeze control，Or by stopping the 3rd cooling sector (6) cooling water running、Open the 3rd shutter (62) of the 3rd cooling sector (6)，The gravity-flow ventilation draft introducing cold air reduction tower in tower carries out antifreeze control.
- The antifreeze method of the indirect dry cooling tower of a kind of multilamellar the most according to claim 9 cooling sector, it is characterized in that: arranging multiple second cooling triangle (11) and corresponding the second shutter (12) in the second described cooling sector (1), the second shutter (12) is arranged at the air intake of the second cooling triangle (11).
- The antifreeze method of the indirect dry cooling tower of 11. a kind of multilamellar according to claim 9 cooling sectors, it is characterized in that: arranging multiple 3rd cooling triangle (61) and the 3rd corresponding shutter (62) in the 3rd described cooling sector (6), the 3rd shutter (62) is arranged at the air intake of the 3rd cooling triangle (61).
- The antifreeze method of the indirect dry cooling tower of 12. a kind of multilamellar according to claim 9 cooling sectors, it is characterized in that: the second described cooling sector (1) quantity is multiple, being arranged in parallel between second cooling sector (1), the operation of each second cooling sector (1), excision control to be separate.
- The antifreeze method of the indirect dry cooling tower of 13. a kind of multilamellar according to claim 9 cooling sectors, it is characterized in that: the 3rd described cooling sector (6) quantity is multiple, being arranged in parallel between 3rd cooling sector (6), the operation of each 3rd cooling sector, excision control to be separate.
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| CN108444309B (en) * | 2018-03-19 | 2019-08-06 | 国电南京电力试验研究有限公司 | A kind of heat storage type defroster for indirect air cooling system |
| CN110017697A (en) * | 2019-04-19 | 2019-07-16 | 中国大唐集团科技工程有限公司 | A kind of indirect air cooling heat radiator of multistage water distribution |
| CN110595224A (en) * | 2019-09-30 | 2019-12-20 | 北京首航艾启威节能技术股份有限公司 | Anti-freezing device and method for indirect air cooling column of thermal power plant |
| CN113137826B (en) * | 2021-04-20 | 2022-11-04 | 华北电力科学研究院有限责任公司 | Mechanical ventilation indirect air cooling system control method and system |
| CN115518406A (en) * | 2022-08-11 | 2022-12-27 | 华北电力科学研究院有限责任公司 | Method and device for debugging flue gas water lifting system |
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