CN102721445B - Device and method for measuring drifting rate of cooling tower - Google Patents
Device and method for measuring drifting rate of cooling tower Download PDFInfo
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Abstract
The invention relates to a device and a method for measuring a drifting rate of a cooling tower. A supporting foot fixed member is fixedly connected with a hexagonal bracket supporting foot, and six hexagonal bracket supporting feet are respectively fixedly connected with high-efficient water receiving devices which respectively have the models A to F through water receiving device fixed members. The selection of each high-efficient water receiving device is determined by the diameter of an air duct, and each high-efficient water receiving device is respectively connected with a scale pipe through a guide pipe; or two supporting rods are fixedly connected to a square air port through a supporting rod fixed member, the lower ends of the two supporting rods are respectively fixedly connected with an M-model high-efficient water receiving device and an N-model high-efficient water receiving device respectively through water-receiving device fixed members, and the M-model and the N-model high-efficient water receiving devices are respectively connected with the scale pipe through the guide pipes. The drifted water at an outlet of the cooling tower within a water receiving area can be completely collected without being influenced by approximately-saturated wet hot air, and more accuracy is realized; and the process for repeatedly utilizing a high-precision scale to weigh can be canceled, and more simplicity and convenience can be realized.
Description
Technical field
The present invention relates to a kind of measurement mechanism and method, specifically a kind of cooling tower of measuring wafts water rate device and method.
Background technology
Cooling tower industry is good at Chinese development, cooling tower is all widespread uses in national life and commercial production, in order to ensure cooling tower industry sustainable health development, relevant competent authorities have formulated a series of production, test specification, as Chinese Industrial Standards (CIS) GB/T7190.1-2008 and DB31/T204-2010.Comprising the assay method of water rate of wafing about cooling tower.
Water rate of wafing is the important indicator of cooling tower water-saving performance.In the operational process of cooling tower particularly mechanical-draft cooling tower, can with the air motion aspirated by blower fan by the little water droplet of sprinkler, overwhelming majority water droplet traps by the be cooled water collection device of tower self of inertia effect, but still has a small amount of water droplet to be taken out of tower by air-flow to form the water that wafts outward.Water rate of wafing is defined as the water yield of wafing (mass rate of the water that wafts) of cooling tower unit interval and the ratio entering tower cooler quality flow.Water rate of wafing is high means that cooling tower water consumption is large, also causes certain influence to surrounding environment simultaneously.
Through the retrieval to existing water rate measuring method of wafing, moisture absorption method is all used in current CNS and Shanghai City provincial standard, namely the water absorptivity of dry filter paper is utilized, " put into polybag by after filter paper drying; weigh in the balance heavily; take out filter paper, by auxiliary equipment, filter paper level is put into each measuring point, timing.Depending on wafing, regimen condition places 1min-5min, takes out fast, timing.Put into former polybag, weigh in the balance heavily.Draw the difference of successively weighing for twice, be accurate to 0.01g." still there are the following problems for the method: 1, filter paper also can absorb the water vapor in damp-heat air while absorption air outlet of cooling tower wafts water, thus makes measured value higher than actual conditions, defectiveness in principle; 2, filter paper water suction to a certain degree can reach capacity afterwards, no longer absorbs water, and the time of placement is difficult to hold; 3, the process that air outlet was put into and taken out to filter paper has water suction, timing uncertainty, and also there is certain randomness the location of placement location; 4, accuracy of balance requires high, and inconvenient scene is carried, the poor real of measurement.5, because multimetering, the workload of weighing is very large.
Summary of the invention
The present invention is directed to the deficiency that existing suction wet sample measurement cooling tower wafts existing for water rate, provide a kind of cooling tower of measuring to waft water rate device and method.This device and method can improve accuracy, the real-time that water rate of wafing is measured, easy to use.
The present invention is achieved by the following technical solutions:
A kind of cooling tower of measuring wafts water rate device, comprises circular air outlet cooling tower and to waft water collecting device, and square air outlet cooling tower wafts water collecting device, is characterized in:
The circular air outlet cooling tower water collecting device that wafts comprises support center disk, the various high-efficient water-recovering device of support feet, A ~ F as Type B high-efficient water-recovering device and C type high-efficient water-recovering device, mozzle, staff gauge pipe, feet fixture, the first water collection device fixture.At circular air outlet place, measure the cooling tower water rate device that wafts and be fixedly connected with support feet by feet fixture, support feet and support center disk composition support, six support feets are fixedly connected with any one in the various high-efficient water-recovering device of A ~ F respectively by the first water collection device fixture, and the various high-efficient water-recovering device of A ~ F connects staff gauge pipe respectively by mozzle again.
The square air outlet cooling tower water collecting device that wafts comprises support bar, support bar fixture, second water collection device fixture, M type high-efficient water-recovering device, N-type high-efficient water-recovering device, water collection device web member, mozzle and staff gauge pipe, at square air outlet place, measure the cooling tower water rate device that wafts and be fixedly connected with two support bars by support bar fixture, be fixedly connected with M type high-efficient water-recovering device and N-type high-efficient water-recovering device respectively by the second water collection device fixture below two support bars, M type high-efficient water-recovering device is connected staff gauge pipe with N-type high-efficient water-recovering device respectively by mozzle.
The various high-efficient water-recovering device main body of A ~ F is inverted V-shaped, below both sides be respectively equipped with positive V-type groove, afterbody is provided with water collector, and the both sides angle of air intake narrow slit is α, and two walls being projected as in the horizontal plane is fan-shaped.
Staff gauge pipe is Y-shaped, and the cock for regulating the liquid level before test is equipped with in bottom, and the jag end on top is connected with mozzle, and other end top has aperture, identical for holding tube inner and outer air pressure, guarantees that water can flow into smoothly.
M type high-efficient water-recovering device and N-type high-efficient water-recovering device, Qi Gebian is parallel to each other, and the horizontal projection receiving water narrow slit is rectangle, and wherein M type high-efficient water-recovering device afterbody is provided with water collector.
Type B high-efficient water-recovering device and C type high-efficient water-recovering device summit are respectively 80mm and 1000mm, between the two every placement when horizontal positioned from the centre distance of support center disk.
Adopt and measure the cooling tower water rate measurement device cooling tower that wafts and to waft the method for water rate, the steps include:
The first step measures air outlet of cooling tower diameter or the air outlet of cooling tower length of side with tape measure, then according to the diameter of air outlet or the length of side of air outlet, corresponding high-efficient water-recovering device is selected to combine, again the circular air outlet cooling tower being provided with the combination of corresponding water collection device water collecting device or the square air outlet cooling tower water collecting device that wafts that wafts is fixed on the air outlet of cooling tower, measures the horizontal sextant angle θ of high-efficient water-recovering device narrow slit length direction with bevel protractor;
Second step wafts water until more than the minimum scale mark of staff gauge pipe with high-efficient water-recovering device trapping;
3rd step is timing and records staff gauge pipe: record start timing time scale and when the water level in staff gauge pipe rises to close to full scale line, stop timing and record staff gauge pipe stopping timing time scale, N number of staff gauge pipe carries out successively;
4th step is list and calculates:
The circular air outlet cooling tower high-efficient water-recovering device waftd in water collecting device is divided into A, B, C, D, E and F six models, according to air outlet of cooling tower diameter, select the high-efficient water-recovering device matched combined of A, B, C, D, E and F six models, gradation is also needed to measure when air outlet diameter is greater than 4m, and calculate by water rate computing formula of wafing accordingly, draw result of calculation; Or the square air outlet cooling tower high-efficient water-recovering device waftd in water collecting device is divided into M, N-type, according to the air outlet of cooling tower length of side, with wafing accordingly, water rate computing formula calculates, and draws result of calculation.
The invention has the beneficial effects as follows: the present invention almost can collect the water and by affecting close to saturated damp-heat air of wafing of cooling tower outlet completely, more accurately; Eliminate repeatedly by the process that high precision balance is weighed, easier.
Accompanying drawing explanation
Fig. 1 is that circular air outlet cooling tower of the present invention wafts water collecting device structural upright schematic diagram;
Fig. 2 is that square air outlet cooling tower of the present invention wafts water collecting device structural upright schematic diagram;
Fig. 3 is the structural upright schematic diagram of circular air outlet high-efficient water-recovering device used for cooling tower;
Fig. 3 a is the vertical view of circular air outlet high-efficient water-recovering device B used for cooling tower;
Fig. 3 b is in figure 3 along the oblique view after A-A section;
Fig. 4 is the structural upright schematic diagram of square air outlet high-efficient water-recovering device used for cooling tower;
Fig. 4 a is the vertical view of high-efficient water-recovering device M;
Fig. 4 b is in the diagram along the oblique view after B-B section;
Fig. 5 is staff gauge pipe structural representation.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Cooling tower of the present invention wafts water rate measurement mechanism, comprises circular air outlet cooling tower and to waft water collecting device, and square air outlet cooling tower wafts water collecting device.
As shown in Figure 1, survey circular air outlet cooling tower air duct diameter be 3m.The circular air outlet cooling tower water collecting device that wafts comprises support center disk 1, support feet 9, the various high-efficient water-recovering device of A ~ F, as Type B high-efficient water-recovering device 2, C type high-efficient water-recovering device 4, mozzle 3, staff gauge pipe 5, feet fixture 6 and the first water collection device fixture 8 are arranged on the air outlet place of the chimney fan 10 above upper cover plate 7, feet fixture 6 is fixedly connected with support feet 9, support feet 9 and support center disk 1 form support, six support feets 9 on support are fixedly connected with any one in the various high-efficient water-recovering device of A ~ F respectively by the first water collection device fixture 8, as Type B high-efficient water-recovering device 2 and C type high-efficient water-recovering device 4, the various high-efficient water-recovering device of A ~ F connects staff gauge pipe 5 respectively by mozzle 3 again.
Mozzle 3 is General Purpose Rubber flexible pipe, due to the plasticity that it is good, fixing be connected all very convenient.The water collected is pooled in the groove bottom water collection device and then flows to staff gauge pipe 5 along mozzle 3.
Support every root pin can install fixing high-efficient water-recovering device, and have in bottom special fixture to be connected with cooling tower air duct outer.The different position of water collection device on strut angle immobilizes, and concrete distance is shown in form one.The type selecting collocation logic of water collection device is shown in form two.In this example high-efficient water-recovering device B summit when horizontal positioned from the distance of support disc centre be 80mm, high-efficient water-recovering device C and B interval are placed, its summit is 1000mm from the distance of disc centre when level, and six roots of sensation pin is equidistant is fixed on air duct outer, Stability Analysis of Structures.
As shown in Fig. 3,3a, 3b, circular air outlet A ~ F used for cooling tower various high-efficient water-recovering device main body is reverse V-shaped, below both sides be respectively equipped with positive V-type groove 23, afterbody is provided with water collector 25, the both sides angle of air intake narrow slit is α, and two walls being projected as in the horizontal plane is fan-shaped.The water droplet collected is gathered on internal face 22, flows down along internal face when reaching a certain amount of, flows in the small-sized positive V-type groove 23 in bottom.Because water collection device and surface level have a less inclination angle theta, Gu Shui can flow in the water collector 25 of water collection device afterbody downwards along small-sized positive V-type groove, water collector and mozzle 3 UNICOM, the other end of mozzle is connected with staff gauge pipe 5, and the water gravitate collected finally is pooled in staff gauge pipe 5 along this passage.α angle difference (the water collection device area caused for avoiding identical central angle has big difference) corresponding to different model water collection device is specifically as shown in form one.The damp-heat air at fan outlet place and waft water due to inertia move upward time, be subject to the stop of high-efficient water-recovering device, damp-heat air changes direction of motion, walks around from water collection device side, and the large water water droplet that wafts of quality continues to move upward until contact with water collection device internal face, due to own tension effect, be gathered in water collection device on the surface, when water droplet gathers a certain amount of, water droplet gravitate overcomes tension force and moves downward, be pooled in mozzle, flow to staff gauge pipe.Although cooling tower has carried water collection device, because all air-out all will pass through it, in order to reduce resistance and the comprehensive energy efficiency considering cooling tower, therefore it can only collect part water droplet.And the part be not collected into is discharged outside tower with air-flow, form the water that wafts.Described high-efficient water-recovering device can be better through receiving water-based, and area is little, to tower to go out wind effect very little.
As shown in Figure 5, staff gauge pipe 5 is in " Y " font, and bottom is equipped with cock 24 and is used for the liquid level before regulating test, the jag end 21 on top is connected with mozzle 3, the top of other end staff gauge pipe main body has aperture 26, can holding tube inner and outer air pressure identical, guarantee that water can flow into smoothly.The scale mark of zero-sum more than zero, through Laboratory Calibration, is marked in bottom.During test, the liquid level of the above water of zero graduation is readable at any time.
During concrete operations, first select corresponding high-efficient water-recovering device to combine according to cooling tower air duct diameter, this example when air duct diameter is at 2-4m, according to form two, select the water collection device combination of 3A+3B, then according to the requirement of form one, water collection device is fixed on the feet of support.As shown in Figure 1, support, high-efficient water-recovering device, mozzle 3 and staff gauge pipe 5 has been connected and fixed.The positioning requirements of water collection device on feet is accurate, fixes the angle theta that rear bevel protractor measures water collection device and surface level, and the part as experimental data participates in calculating below.The water droplet risen with air-flow is subject to the stop of high-efficient water-recovering device, clashes into and is adsorbed on water collection device wall.Along with the increase of aggregate amount, the water leg then flowing to afterbody in the tank that water droplet slides to positive V-type bottom water collection device under wall eventually passes mozzle and flows in staff gauge pipe 5.Staff gauge pipe 5 can be fixed flexibly according to field condition, but will keep vertical and steady.When water enters staff gauge pipe 5 along mozzle 3, be first gathered in bottom it, then liquid level slowly rises, and after exceeding zero graduation, just can start timing successively bottom the full staff gauge pipe of water logging.If timing failure, the cock of bottom can be opened, bleed off part water until liquid level is down to comparatively below low scale line or zero graduation line, reclocking.After starting timing, write down the liquid level h in corresponding staff gauge pipe successively
i1.(generally recommend close to full scale line) when liquid rises to certain scale, stop timing.Then the liquid level h at the end of measuring is recorded successively
i2and time t used (stopwatch can directly read the time used).By height gain (h
i2-h
i1) bring formula into
the mass incremental (staff gauge pipe internal diameter is recommended as 10mm) of water in corresponding staff gauge pipe can be tried to achieve, the flow of chilled water is directly recorded by flowmeter, then the inclination angle theta of water collection device and the surface level recorded is combined above, bring corresponding formula in form two into, just can try to achieve the water rate of wafing of this cooling tower.
As shown in Figure 2, the square air outlet cooling tower water collecting device that wafts comprises support bar 15, support bar fixture 12, second water collection device fixture 17, M type high-efficient water-recovering device 19, N-type high-efficient water-recovering device 16, water collection device web member 18, mozzle 3 and staff gauge pipe 5.Square air outlet 11 is fixedly connected with two support bars 15 respectively by support bar fixture 12, two support bars 15 are fixedly connected with M type high-efficient water-recovering device 19 respectively by the second water collection device fixture 17 below and N-type high-efficient water-recovering device 16, M type high-efficient water-recovering device 19 is connected staff gauge pipe 5 with N-type high-efficient water-recovering device 16 respectively by mozzle 3.Support bar 15 mainly rises and supports fixation, by fixture, self and high-efficient water-recovering device is fixed on cooling tower air duct air outlet place.High-efficient water-recovering device is firmly fixed on support bar 15.Support bar 15 connects one section of M type high-efficient water-recovering device 19 a little less than the other end, facilitates water to flow into staff gauge pipe 5.
As Fig. 4, shown in 4a, 4b, used similar in square air outlet high-efficient water-recovering device used for cooling tower main body and circular air outlet cooling tower, but each limit of water collection device used in square air outlet cooling tower is parallel, the horizontal projection receiving water narrow slit is rectangle instead of fan-shaped.
During concrete operations, the air outlet length of side of square air outlet cooling tower is first measured with tape measure, corresponding high-efficient water-recovering device is selected to combine according to the air outlet of cooling tower length of side, when the air outlet length of side is 2.35-3.55m, shown in Fig. 2, be connected and fixed support bar 15, M type high-efficient water-recovering device 19, N-type high-efficient water-recovering device 16, mozzle 3 and staff gauge pipe 5.Water collection device is wanted evenly, suitably to raise the non-end that catchments of water collection device in air outlet distribution.Water collection device web member 18 shape and water collection device similar, but length is very short, and its inside dimension is just in time coincide with water collection device external dimensions, uses the contact position of two water collection devices during water collection device web member 18 will pad rubber sheet gasket, press seal.Other operations are identical with circular air outlet cooling tower, when finally bringing data calculating into, need the computing formula by water rate of wafing in form four.For avoiding the air outlet water that wafts uneven, first time needs that support bar is changed 90 degree and surveys one group of data again after test.Finally get the mean value of twice measurement as final testing result.
For the circular air outlet cooling tower of circular tower: first measure then basis with tape measure, select corresponding water collection device to combine.
The first step measured measures air outlet of cooling tower diameter with tape measure, then according to the diameter of air outlet, corresponding water collection device is selected to combine, the installation method required according to respective combination is again fixed on the air outlet of cooling tower the circular tower cooling tower water collecting device that wafts, and measures the horizontal sextant angle θ of high-efficient water-recovering device narrow slit length direction with bevel protractor.This step can be carried out when cooling tower is shut down, and also can carry out when cooling tower works.
The second step measured should carry out under cooling tower normal running conditions.High-efficient water-recovering device traps the water that wafts; When the water that wafts being trapped in water collection device inside surface gathers a certain amount of, overcome tension force under gravity to move downward, from just " V " type diversion trench of water collection device ingress edge, to the water leg of water collection device end, again through mozzle 3, flow into staff gauge pipe 5, until more than the minimum scale mark of staff gauge pipe 5.
The 3rd step measured starts timing and writes down scale when staff gauge pipe starts timing, and N number of staff gauge pipe carries out successively; When the water level in staff gauge pipe 5 rises to close to full scale line, scale when stopping timing and write down staff gauge pipe stopping timing, N number of staff gauge pipe also carries out successively; Time of clocking is longer, and measurement result accuracy is higher.
The 4th step measured is for tabling look-up and calculating: in order to improve measuring accuracy and accuracy, and considers the composite factors such as the dirigibility of measurement and device portability, water collection device is divided into A, B, C, D, E and F six models, specifically sees form one.For the air outlet of different-diameter, the matched combined in form two can be selected, finally bring related data into and draw result of calculation.
Form one
Note: θ is the angle in water collection device and air duct cross section, records according to actual installation situation.
Carry out united application according to the water collection device of different air duct internal diameters to above six kinds of sizes during test, concrete test logic is as form two:
Form two
The quality of water that wherein staff gauge pipe is collected within institute writing time is
In formula: P
f---water rate of wafing
ρ---water-mass density
D---staff gauge pipe internal diameter
H
i1---scale intraluminal fluid position scale during beginning timing
H
i2---fluid level scale in staff gauge pipe at the end of timing
T
i---timing time
Q---cooling tower water flow
D---staff gauge pipe internal diameter
When water enters staff gauge pipe along mozzle, be first gathered in bottom it, then liquid level slowly rises, and when the water surface rises to minimum scale, starts timing.Now start timing, left the system homeostatic time for, result is more accurate.When liquid level rises to certain scale, stop timing.Then water surface elevation increment h and time t used in Measuring Time is recorded.The method time is more of a specified duration, and measurement result is more close to actual value.Six pin of six foot rests carry out measuring and record successively, finally gets the mean value measured for six times and calculate.Concrete water rate of wafing computing formula is according to form two, and substituting into related data can try to achieve.
For squarer square air outlet cooling tower cooling tower:
Measuring method and circular tower circular air outlet cooling tower cooling tower is similar, and difference is:
The first, first measure the air outlet of cooling tower length of side with tape measure, then according to the length of side of air outlet, select corresponding water collection device to combine.
The second, the water collection device of the square air outlet cooling tower of squarer is divided into M, N two profiles number, and wherein N matching connector uses.Relative dimensions is as form three:
Form three
Carry out united application according to the water collection device of the different air duct length of sides to above two kinds of sizes during test, concrete test logic is as form four:
Form four
Note: letter annotation and m in upper table
icomputing method are the same with circular air outlet cooling tower.
3rd, the both sides of the high-efficient water-recovering device receipts water narrow slit of squarer square air outlet cooling tower are parallel, and not in fan-shaped, namely narrow slit projects to the width on surface level is certain.Therefore, in squarer square air outlet cooling tower, water collection device can utilize connector constantly to lengthen (quantity increasing water collection device N) to reach the object measuring the larger tower of the length of side.The mechanism of water collection device M with N is substantially the same, and just water collection device M end is connected with water collector, can gather the water collected above and send into mozzle finally to arrive staff gauge pipe.
4th, the support bar in the square air outlet cooling tower of squarer no longer supports with the form of support, but is directly connected to the air outlet place of tower with telescopic aluminum pipe, and both sides are respectively fixed with a securing member, make support bar be a tiny inclination angle.Then water collection device is fixed on support bar, the distance specifically from supporting bar top has strict demand unlike the circular air outlet cooling tower of circular tower admittedly, as long as water collection device combination finally can cover air outlet.
5th, finally measurement data to be substituted in the formula of form four when the square air outlet cooling tower of squarer is tested and calculate.
Claims (3)
1. measurement cooling tower wafts a water rate device, comprises circular air outlet cooling tower and to waft water collecting device, and square air outlet cooling tower wafts water collecting device, it is characterized in that:
The circular air outlet cooling tower water collecting device that wafts comprises support center disk (1), support feet (9), the various high-efficient water-recovering device of A ~ F, mozzle (3), staff gauge pipe (5), feet fixture (6), first water collection device fixture (8), chimney fan (10) air outlet place on cooling tower upper cover plate (7), measure the cooling tower water rate device that wafts and be fixedly connected with support feet (9) by feet fixture (6), support feet (9) and support center disk (1) composition support, six support feets (9) are fixedly connected with the various high-efficient water-recovering device of A ~ F respectively by the first water collection device fixture (8), the various high-efficient water-recovering device of A ~ F connects staff gauge pipe (5) respectively by mozzle (3) again,
The square air outlet cooling tower water collecting device that wafts comprises support bar (15), support bar fixture (12), second water collection device fixture (17), M type high-efficient water-recovering device (19), N-type high-efficient water-recovering device (16), water collection device web member (18), mozzle (3) and staff gauge pipe (5);
Be positioned at square air outlet (11) place, measure the cooling tower water rate device that wafts and be fixedly connected with two support bars (15) by support bar fixture (12), two support bars (15) are fixedly connected with M type high-efficient water-recovering device (19) and N-type high-efficient water-recovering device (16) respectively by the second water collection device fixture (17) below, and M type high-efficient water-recovering device (19) is connected staff gauge pipe (5) with N-type high-efficient water-recovering device (16) respectively by mozzle (3);
The various high-efficient water-recovering device main body of described A ~ F is inverted V-shaped, below both sides be respectively equipped with positive V-type groove (2,3), afterbody is provided with water collector (25), and the both sides angle of air intake narrow slit is α, and two walls being projected as in the horizontal plane is fan-shaped; Described M type high-efficient water-recovering device (19) and N-type high-efficient water-recovering device (16), Qi Gebian is parallel to each other, and the horizontal projection receiving water narrow slit is rectangle, and wherein M type high-efficient water-recovering device (16) afterbody is provided with water collector (25).
2. measurement cooling tower according to claim 1 wafts water rate device, it is characterized in that: described Type B high-efficient water-recovering device and C type high-efficient water-recovering device summit are respectively 80mm and 1000mm, between the two every placement when horizontal positioned from the centre distance of support center disk (1).
3. adopt the as claimed in claim 1 cooling tower water rate measurement device cooling tower that wafts of measuring to waft the method for water rate, it is characterized in that, concrete steps are:
The first step measures air outlet of cooling tower diameter or the air outlet of cooling tower length of side with tape measure, then according to the diameter of air outlet or the length of side of air outlet, corresponding high-efficient water-recovering device is selected to combine, again the circular air outlet cooling tower being provided with the combination of corresponding water collection device water collecting device or the square air outlet cooling tower water collecting device that wafts that wafts is fixed on the air outlet of cooling tower, measures the horizontal sextant angle θ of high-efficient water-recovering device narrow slit length direction with bevel protractor;
Second step wafts water until more than the minimum scale mark of staff gauge pipe with high-efficient water-recovering device trapping;
3rd step is timing and records staff gauge pipe liquid level: record starts scale during timing, when the water level in staff gauge pipe rises to close to full scale line, and scale when stopping timing and record staff gauge pipe stopping timing, N number of staff gauge pipe carries out successively;
4th step is list and calculates: the circular air outlet cooling tower high-efficient water-recovering device waftd in water collecting device is divided into A, B, C, D, E and F six models, according to air outlet of cooling tower diameter, select the high-efficient water-recovering device matched combined of A, B, C, D, E and F six models, gradation is also needed to measure when air outlet diameter is greater than 4m, and calculate by water rate computing formula of wafing accordingly, draw result of calculation; Or the square air outlet cooling tower high-efficient water-recovering device waftd in water collecting device is divided into M, N-type, according to the air outlet of cooling tower length of side, with wafing accordingly, water rate computing formula calculates, and draws result of calculation.
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