CN102706550B - Water-spraying uniformity testing device - Google Patents
Water-spraying uniformity testing device Download PDFInfo
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- CN102706550B CN102706550B CN201210179735.6A CN201210179735A CN102706550B CN 102706550 B CN102706550 B CN 102706550B CN 201210179735 A CN201210179735 A CN 201210179735A CN 102706550 B CN102706550 B CN 102706550B
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Abstract
The invention discloses a water-spraying uniformity testing device and a testing method. A water-collection tray internally provided with micro water collecting cells is arranged at the top of a bracket positioned on a lifting mechanism and used for collecting spraying water; the bottom surface of each micro water collecting cell is communicated with a flow guide tube; an electromagnetic flow meter is mounted on each flow guide tube; the electromagnetic flow meters are connected with a data conversion module; and the electromagnetic flow meters collect spraying flow of the flow guide tubes in a real time manner, the spraying flow is sent to the data conversion module and converted into flow data, the flow data is sent to a data acquisition system, so as to directly obtain spraying water and uniform distribution coefficients of all the micro water collecting cells. Therefore, the distance from a nozzle to the water-collection tray in a spray device can be adjusted through the lifting mechanism to obtain different uniform distribution coefficients, and the optimal distance from the nozzle to the water-collection tray (the top surface of filling material) in the spray device can be obtained through a plurality of distance experiments; the result obtained through the invention is more practical compared with results obtained through calculation; and the vertical distance from the tested area to the outlet of the spray device can be adjusted conveniently, so as to realize the arrangement optimization of the spray device.
Description
Technical field
The present invention relates to fire/nuclear power field, specifically, is a kind of proving installation and method of testing of accurate measurement cooling tower spraying and splashing facility water distribution uniformity.
Background technology
The effect of cooling tower is by after exhaust steam in condenser and chilled water heat exchange, the chilled water carrying exhaust steam used heat is carried out heat interchange at Ta Nei and air, makes used heat be transferred to air and spill into air.The feature of cooling tower is that air directly contacts with water, and by transmission of heat by contact and evaporative heat loss, the delivered heat in water to air, heat exchanger effectiveness is higher, and the ultimate temperature that water is cooled is the wet-bulb temperature of air.
The cooling effect quality of cooling tower, mainly the cooling number of packing decides, and cooling tower water distribution system quality directly affects the performance of packing.The water distribution system of cooling tower is that sprinkle is on the end face of filler equably by the hot water that enters in cooling tower, and the homogeneity of trickle on the cooling effect impact of cooling tower greatly.No matter which kind of filler, if drenched less than water, so this partial filler just can not play cooling effect.If filler is drip filler, air has pool large at the amount ratio not having the packing area of trickle to pass through, and the efficiency reducing cooling tower is obvious; For thin-film packing material, redistributing of air is obvious not as drip filler, but is not participated in the heat exchanging process in tower by the air of anhydrous packing area, and the efficiency of tower also necessarily declines.For the impact of cooling stack, except above-mentioned points, the ventilation of cooling tower can also be lowered.Even filler can both pour hot water, if the homogeneity of water distribution is bad, the effect of cooling tower also can be made to degenerate.Have testing data to show, increase to 0.2 for the uniform coefficient of 4000 ㎡ tower water distribution by 0, water temperature raises 0.2 DEG C; When uniform coefficient reaches 0.4, temperature raises nearly 1 DEG C; When uniform coefficient reaches 0.7, temperature increases 4 DEG C.Visible water distribution uniformity role in cooling tower is big.
Existing is calculating of passing through to spraying and splashing facility trickle homogeneity, record according in international standard DL/T933-2005: with the radial water yield of single shower nozzle for foundation, getting a representative area is scope of statistics, all contiguous shower nozzles are superposed the overboard amount on each unit dimension involved by this region, obtain the water distribution state of this region in units of infinitesimal, carry out mean square deviation calculating again, can be described as shower nozzle and combine uniform coefficient or mean square deviation a
0, that is:
Wherein, N is micro unit number; X
ibe that splashing down in i-th cell superposes water yield height;
for N number of micro-single average overboard amount height.
But because the trickle between adjacent shower nozzle can collide mutually, the uniform coefficient of above-mentioned calculating gained can not consider the mutual collision of shower nozzle trickle, is a kind of perfect condition of simplification, inconsistent with the uniform coefficient of reality, there is error result and is inaccurate.
Summary of the invention
The present invention is directed to above-mentioned deficiency, proposing by measuring the device obtaining spraying and splashing facility trickle homogeneity, measurement result can the water distribution uniformity of actual response spray apparatus.
A kind of trickle homogeneity test device, comprises water-collecting tray, mozzle, electromagnetic flowmeter, support, elevating mechanism, data conversion module, data acquisition system (DAS).
Wherein, support is tubular framed structure, and cradle top is provided with water-collecting tray; Described water-collecting tray is the airtight rectangular drum like structure in bottom surface, and bottom surface is surface level; Water-collecting tray inside is divided into by dividing plate the micro unit lattice that catchment that at least 100 have same size, and each micro unit lattice range of size of catchmenting is: 50mm × 50mm ~ 100mm × 100mm; The end face of dividing plate flushes with water-collecting tray end face.
Each place of micro unit lattice bottom center that catchments is communicated with a mozzle, and each mozzle all and horizontal plane; Each mozzle is provided with electromagnetic flowmeter; Each electromagnetic flowmeter is all connected with data conversion module, trickle flow in every root mozzle that each electromagnetic flowmeter records is gathered by electromagnetic flowmeter, trickle flow electric signal in every root mozzle is sent data conversion module and is converted to data on flows, send to data acquisition system (DAS), directly can obtain the trickle amount of the micro unit lattice that respectively catchment and uniform coefficient by data acquisition system (DAS) thus.
To the distance of water-collecting tray by shower nozzle in elevating mechanism adjustment spraying and splashing facility, different uniform coefficients can be obtained, just can to obtain in spraying and splashing facility shower nozzle to the optimum distance of water-collecting tray (filler end face) through multiple distance test (DT) thus.
The present invention also proposes a kind of trickle homogeneity testing method, is completed by following step:
Step 1: water-collecting tray is set;
Test zone place is needed below the shower nozzle that water-collecting tray inside with the micro unit lattice that catchment is horizontally set on spraying and splashing facility.
Step 2: spraying and splashing facility trickle;
The shower nozzle opening spraying and splashing facility continues trickle in each micro unit lattice that catchment in water-collecting tray.
Step 3: in the micro unit lattice that respectively catchment, trickle flow is measured in real time;
By catchmenting at each, place of micro unit lattice bottom center is vertically communicated with a mozzle, and on each mozzle, electromagnetic flowmeter is installed, the trickle respectively catchmented in micro unit lattice is made to flow in mozzle, thus by the flow of trickle in each micro unit lattice that catchment of each electromagnetic flowmeter Real-time Obtaining.
Step 4: to trickle flow Real-time Collection in the micro unit lattice that respectively catchment;
The flow electrical signal data obtained by each electromagnetic flowmeter is converted to data on flows, sends to computing machine to carry out Real-time Collection.
By adjusting the distance of shower nozzle to water-collecting tray 1 in step 1, carry out step 2 ~ 4, the trickle uniform coefficient of shower nozzle to water-collecting tray 1 different distance can be obtained, so repeatedly, just can obtain shower nozzle in spraying and splashing facility to water-collecting tray 1(filler end face) optimum distance.
Above-mentioned Bracket setting is on elevating mechanism, and described elevating mechanism is hand-hydraulic lifting platform truck.
The invention has the advantages that:
1, trickle homogeneity test device of the present invention, one-piece construction is simple, and conveniently adjusted tested area and the vertical range exported with spraying and splashing facility, carry out the optimization of spraying and splashing facility layout;
2, trickle homogeneity testing method of the present invention, the result that the trickle uniformity results that measurement obtains calculates acquisition is relatively more realistic;
3, trickle homogeneity test device of the present invention adopts electromagnetic flowmeter to carry out the water yield of different micro unit, and reading simple to operate is fast accurate.
Accompanying drawing explanation
Fig. 1 is trickle homogeneity test device one-piece construction schematic side view of the present invention;
Fig. 2 is water-collecting tray structure vertical view in trickle homogeneity test device of the present invention;
Fig. 3 has back taper bottom surface to catchment the water-collecting tray structure of micro unit lattice and mounting means schematic diagram;
Fig. 4 is trickle homogeneity testing method overall flow figure of the present invention;
Fig. 5 is water-collecting tray, mozzle and electromagnetic flowmeter set-up mode schematic diagram during employing trickle homogeneity testing method of the present invention.
In figure:
1-catchments micro unit lattice 2-mozzle 3-electromagnetic flowmeter 4-support
5-elevating mechanism 6-data conversion module 7-data acquisition system (DAS) 8-drainpipe
101-dividing plate 102-catchments micro unit lattice 401-back up pad
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Trickle homogeneity test device of the present invention, comprises water-collecting tray 1, mozzle 2, electromagnetic flowmeter 3, support 4, elevating mechanism 5, data conversion module 6, data acquisition system (DAS) 7, as shown in Figure 1.
Wherein, support 4 is rectangular drum like framed structure, and upper inner circumference level is fixed with back up pad 401, and back up pad 401 is used for carrying out supporting and location to water-collecting tray 1.4 four sides are provided with switch gate to support, the closing switch door when testing, and place water and are splashed into support 4 inside; Just the service work of support 4 internal components can be carried out when opening switch gate.
Described water-collecting tray 1 is the airtight rectangular drum like structure in bottom surface, and bottom surface is surface level.Water-collecting tray 1 external circumferential size is equal with support 4 inner circumferential size, and the height of water-collecting tray 1 and back up pad to support 4 end face apart from equal.Water-collecting tray 1 is arranged in support 4 back up pad, carries out supporting and locate to water-collecting tray 1 by back up pad.Water-collecting tray 1 inside is divided into by dividing plate 101 the micro unit lattice 102 that catchment that at least 100 have same size, and each micro unit lattice range of size of catchmenting is: 50mm × 50mm ~ 100mm × 100mm; The end face of dividing plate 101 flushes with water-collecting tray 1 end face.Above-mentioned water-collecting tray 1 is all not more than 3mm with dividing plate 101 thickness, all adopts the material of not easily getting rusty; And adjacent catchment between micro unit lattice 102 ensure can not be permeable; The number of the cross-sectional area of water-collecting tray 1 and the micro unit lattice 102 that catchment can change according to the minimum microcell dimensions of homogeneity tested with the spraying and splashing facility arrangement pitch needing to test and needing, water-collecting tray 1 is arranged on below spraying and splashing facility, is catchmented for cell 102 is collected trickle by each.In the present embodiment, water-collecting tray 1 xsect is the square of length of side 100cm, and inner to be divided into each 10 xsects anyhow by dividing plate 101 be that the square of length of side 10cm catchments micro unit lattice, as shown in Figure 2.Each place of micro unit lattice 102 bottom center that catchments is communicated with a mozzle 2, and each mozzle 2 all and horizontal plane.Each mozzle is provided with electromagnetic flowmeter 3, electromagnetic flowmeter 3 is positioned at apart from mozzle 2 water intake end 10 times of diameter places or apart from diameter place, 5 times, water side.Each electromagnetic flowmeter 3 is all connected with data conversion module 6, by trickle flow in each mozzle 2 of electromagnetic flowmeter 3 Real-time Obtaining, trickle flow electric signal in every root mozzle 2 is sent data conversion module 6 and is converted to data on flows, send to data acquisition system (DAS) 7, directly can obtain the trickle amount of the micro unit lattice 102 that respectively catchment and uniform coefficient in real time by data acquisition system (DAS) 7 thus.Above-mentioned electromagnetic flowmeter 3 bore can select according to the size of the micro unit lattice 102 that catchment the flow measurement range that is applicable to, makes flow measurement precision reach 0.5 rank.
Above-mentioned each mozzle 2 water side is all communicated with a drainpipe 8, drainpipe 8 is colloid flexible pipe, also can adopt and mozzle 2 same material, thus in each micro unit lattice 102 that catchment after trickle enters into mozzle 2, can be discharged to the outside in water collecting basin by support 4 by each drainpipe 8.
In order to better, trickle in water-collecting tray 1 is collected in the present invention, as shown in Figure 3, each micro unit lattice 102 bottom surface of catchmenting all is designed to inverted cone-shaped structure, is communicated with mozzle at cone tip part, make thus the chilled water in water-collecting tray 1 can water all concentrate flow to cone tip part, enter mozzle.
Above-mentioned support 4 is arranged in elevating mechanism 5, and described elevating mechanism 5 is a hand-hydraulic lifting platform truck, and adjustable-height is at 0.3 ~ 1.5m.Support 4 is arranged on hand-hydraulic lifting platform truck end face, data conversion module 6 is also arranged on hand-hydraulic lifting platform truck end face simultaneously, manually hydraulic lifting platform cart can adjust the position of water-collecting tray 1, thus make trickle homogeneity test device of the present invention can measure the trickle homogeneity of spraying and splashing facility diverse location, comprise the region adjustment that water-collecting tray 1 is positioned at spraying and splashing facility, and the height control in water-collecting tray 1 and spraying and splashing facility between shower nozzle.Adjust shower nozzle in spraying and splashing facility by elevating mechanism 5 thus and, to the distance of water-collecting tray 1, different uniform coefficients can be obtained, just can obtain shower nozzle in spraying and splashing facility to water-collecting tray 1(filler end face through multiple distance test (DT)) optimum distance.
The present invention also proposes a kind of trickle homogeneity testing method, is completed by following step:
Step 1: water-collecting tray 1 is set;
Test zone place is needed below the shower nozzle that the water-collecting tray 1 inside with the micro unit lattice 102 that catchment is horizontally set on spraying and splashing facility.
Step 2: spraying and splashing facility trickle;
The shower nozzle opening spraying and splashing facility (combination of many shower nozzles) continues trickle in each micro unit lattice 102 that catchment in water-collecting tray 1.
Step 3: in the micro unit lattice 102 that respectively catchment, trickle flow is measured in real time;
By catchmenting at each, place of micro unit lattice 102 bottom center is vertically communicated with a mozzle 2, and on each mozzle 2, electromagnetic flowmeter 3 is installed, the trickle respectively catchmented in micro unit lattice 102 is made to flow in mozzle 2, thus can the flow of trickle in each mozzle 2 of Real-time Obtaining by each electromagnetic flowmeter 3, i.e. the flow of trickle in each micro unit lattice 102 that catchment.Trickle finally flow in outside water collecting basin through mozzle.
Step 4: to trickle flow Real-time Collection in the micro unit lattice 102 that respectively catchment.
The flow electrical signal data that each electromagnetic flowmeter 3 obtains is converted to data on flows, send to data acquisition system (DAS) 7 (computing machine) to carry out Real-time Collection, the data on flows of trickle and the uniform coefficient of trickle in each micro unit lattice 102 that catchment can be obtained thus intuitively
By adjusting the distance of shower nozzle to water-collecting tray 1 in step 1, carry out step 2 ~ 4, the trickle uniform coefficient of shower nozzle to water-collecting tray 1 different distance can be obtained, so repeatedly, just can obtain shower nozzle in spraying and splashing facility to water-collecting tray 1(filler end face) optimum distance.
Claims (6)
1. a trickle homogeneity test device, comprises water-collecting tray, mozzle, electromagnetic flowmeter, support, elevating mechanism, data conversion module, data acquisition system (DAS);
Wherein, support is tubular framed structure, and cradle top is provided with water-collecting tray; Described water-collecting tray is the airtight rectangular drum like structure in bottom surface, and bottom surface is surface level; Water-collecting tray inside is divided into by dividing plate the micro unit lattice that catchment that at least 100 have same size, and the end face of dividing plate flushes with water-collecting tray end face;
Described each micro unit lattice bottom surface of catchmenting all is designed to inverted cone-shaped structure, each micro unit lattice bottom center cone tip part that catchments is communicated with a mozzle, the water intake end of described each mozzle is located to be communicated with each micro unit lattice bottom center that catchments respectively, and each mozzle all and horizontal plane; Each mozzle is provided with electromagnetic flowmeter; Described electromagnetic flowmeter is positioned at apart from mozzle water intake end 10 times of diameter places or apart from diameter place, 5 times, water side; Electromagnetic flowmeter flow measurement precision is 0.5 rank; Each electromagnetic flowmeter is all connected with data conversion module, trickle flow in every root mozzle that each electromagnetic flowmeter records is gathered by electromagnetic flowmeter, trickle flow electric signal in every root mozzle is sent data conversion module and is converted to data on flows, send to data acquisition system (DAS), directly can obtain the trickle amount of the micro unit lattice that respectively catchment and uniform coefficient by data acquisition system (DAS) thus;
Above-mentioned Bracket setting is on elevating mechanism, described elevating mechanism is hand-hydraulic lifting platform truck, support installing is on hand-hydraulic lifting platform truck end face, data conversion module is also arranged on hand-hydraulic lifting platform truck end face, manually hydraulic lifting platform cart can adjust the position of water-collecting tray simultaneously.
2. a kind of trickle homogeneity test device as claimed in claim 1, is characterized in that: described frame upper inner circumferential level is fixed with back up pad, by back up pad supporting and location water-collecting tray.
3. a kind of trickle homogeneity test device as claimed in claim 2, is characterized in that: described water-collecting tray external circumferential size is equal with support inner circumferential size, and the height of water-collecting tray and back up pad to cradle top surface apart from equal.
4. a kind of trickle homogeneity test device as claimed in claim 1, is characterized in that: described water-collecting tray and block board thickness are all not more than 3mm.
5. a kind of trickle homogeneity test device as claimed in claim 1, is characterized in that: described water-collecting tray xsect is the square of length of side 100cm, and inner to be divided into each 10 xsects anyhow by dividing plate be that the square of length of side 10cm catchments micro unit lattice.
6. a kind of trickle homogeneity test device as claimed in claim 1, is characterized in that: above-mentioned each mozzle water side is all communicated with a drainpipe, and drainpipe is colloid flexible pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210179735.6A CN102706550B (en) | 2012-06-01 | 2012-06-01 | Water-spraying uniformity testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179735.6A CN102706550B (en) | 2012-06-01 | 2012-06-01 | Water-spraying uniformity testing device |
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| CN102706550A CN102706550A (en) | 2012-10-03 |
| CN102706550B true CN102706550B (en) | 2015-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104132698B (en) * | 2014-08-18 | 2017-05-24 | 上海理工大学 | Device and method for measuring water spray parameters of evaporative cooling and evaporative compensating equipment |
| CN105043735A (en) * | 2015-07-09 | 2015-11-11 | 河海大学常州校区 | Device for testing water distribution and interaction effect of cooling tower spray devices under different water heads |
| CN107142362B (en) * | 2017-05-08 | 2018-08-31 | 东北大学 | For measuring quenching measuring device and method of the machine width to discharge uniformity |
| CN108168850A (en) * | 2017-09-11 | 2018-06-15 | 同济大学 | Mist flow apparatus for measuring distribution |
| CN110220685A (en) * | 2019-06-26 | 2019-09-10 | 集美大学 | A kind of shower water-spraying amount evenness test device |
| CN113092058A (en) * | 2021-06-09 | 2021-07-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Water feeding distribution measuring device and measuring method for wind tunnel test |
| CN113820093B (en) * | 2021-09-15 | 2022-06-21 | 东北石油大学 | Instantaneous water distribution measuring device |
| CN116380516B (en) * | 2023-06-06 | 2023-09-01 | 山东蓝想环境科技股份有限公司 | Cooling tower water distribution uniformity testing method and matched testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5316336A (en) * | 1976-07-30 | 1978-02-15 | Babcock Hitachi Kk | Waterrspraying head for cooling welded portions |
| CN2349206Y (en) * | 1998-10-26 | 1999-11-17 | 王忠诚 | Equalizing water distributor |
| CN2479463Y (en) * | 2001-04-30 | 2002-02-27 | 于向阳 | Improved gas-water counterflow cooled spray device |
| CN102072812A (en) * | 2010-11-01 | 2011-05-25 | 公安部天津消防研究所 | Test device for water sprinkling distribution performance |
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