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filter bed 濾墊,濾水池。

filter centre

Ceramic grain filters ard made of refined pottery clays added with certain modifiers , and processed of grinding , mixing , shaping and high temperature sintering . they do not contain any substances that harmful to people or environment . they are hard and rough in surface , porous inside the structure , and have the advantages of high mechanical strength , large specific surface area and porosity . when used in water treatment , they behave a activated surface property , a great amount of pollutant entrapment , less water head loss in the filter bed , lower consumption of back - flush water , stable in chemical and gbiologic property , and long service life , ceramic grain filters is a new and efficient filter material to increase the water yield , upgrade the water quality , and save chemicals and energy 陶粒濾料是以精制陶土為主要原料,摻加適量改性劑,經粉碎,混練,成型和高溫煅燒而制成的,不含任何對人體和環境有害的物質.其表面堅硬,粗糙,內部疏松,多孔,具有機械強度高,比表面積大,孔隙率大的特性.用于水處理中,具有表面性狀好,截污能力強,過濾水頭損失小,反沖洗耗水量低,化學穩定性和生物學穩定性好,使用壽命長的特點.陶粒濾料是一種能增加水產量,提高出水質量,節省藥劑和能耗的新型高效過濾材料

The whole project comprised the building of the dam , a 2 , 428 - yard tunnel driven through the wong nai chung gap valley and a 5 , 500 - yard brick and stone aqueduct to connect the reservoir with the storage tank and filter beds at albany road . each day the volume of water being conveyed reached 7 million gallons . the 6 filter beds of the project were situated on the eastern side of the albany nullah ; measuring 3 , 245 sq 除水壩外,其他配套的工程包括: (一)一條長達2 , 428碼、貫穿黃泥涌峽谷的隧道; (二)一條長5 , 500碼的引水道,可連接水塘隧道的亞賓尼濾水池及配水庫,該引水道用石及磚砌成,每天可輸水700萬加侖; (三)位于亞賓尼水渠東部的六個過濾池,該濾水系統面積廣達3 , 245平方碼,深30尺,每天可過濾570萬加侖水,原水過濾后,經一條直徑18寸鐵水管,流入花園道與寶云道交界的配水庫。

It is shown that the effect of pac removing fluoride is closely related to ph value and the optimum range of ph value is between 6 . 1 ? 7 . 1 . under this condition , further studies are made on the optimum coagulant dosage , mixing time , artificial turbidity , filtration rate and filter bed ' s depth and the optimum range of these parameters have been determined 堿式氯化鋁的除氟能力與原水的ph值有密切的關系,除氟最佳ph值范圍為6 . 1 ? 7 . 1 。在此條件下,進一步對最佳投藥量、混合時間、反應時間、人工輔助投加濁度、濾速及濾層厚度進行了研究,確定了其最優的取值。

The characteristic of power quality signal ' s deal by wavelet multi - resolution decomposition and time - domain analysis is studied then brings forward combine the tow methods and uses it to filter bed yawp , decomposition and feature extraction . 8 kinds of power quality are classified and characterization of sag is specially classified 然后研究了小波多分辨率分解和時域分析電能質量信號處理的特點,提出了應用兩種方法相結合的方法,對電能質量信號進行去噪、分解,通過大量的計算機仿真工作,對擾動信號進行了特征提取。

( 4 ) the maximum water quantity becomes greater , the better is the filtering bed permeability , the higher the river hydraulic conductance , the higher the river level , the larger the water - collecting area and the bigger the distance between collecting pipes . the water quantity varies directly with drawdown ( 4 )濾床的滲透性能越好,河床水力傳導系數越高,河水水位越高,取水面積越大,取水管之間的間距越大,則最大取水量越大;水位降深與取水量成正比關系。

The researches indicated : ( 1 ) the seepage flow field of infiltration diversion is characterized by three - dimensional , saturated and steady flow . there is the close hydraulic relationship between the river and the groundwater in the filtering bed , and the groundwater is confined 研究表明: ( 1 )滲濾取水的滲流場具有典型的飽和三維穩定流特征;滲濾取水濾床中地下水與河流的水力聯系比較緊密,濾床中的地下水處于承壓狀態。

In 1897 , the government built a matching water system and three filter beds for the reservoir . during the drought period , private reservoirs helped the government to supply water to hong kong residents , thus easing the problem of water shortage 1897年,政府更為該塘興建一個配水庫及三個濾水池。在天旱期間,私人水塘曾協助政府,提供食水予香港居民,紓緩香港食水短缺的問題。

Additionally in 1939 , the government added filter beds to the aberdeen lower reservoir . due to these improvements , the network of water supply was further widened and even remote areas , such as ap lei chau , could receive fresh water 政府并于1939年,在鴨利洲及香港仔下塘各增建濾水池,使水塘的供水能伸延至鴨利洲一帶的偏遠地區,供水網絡得以擴張。

The second construction phase of the kowloon reservoir began in 1922 and involved extending the filter beds , so that they could filter at least 3 , 580 , 000 gallons per day . the expenses for this were $ 366 , 082 九龍水塘的第二期工程于1922年開展,工程項目包括擴建濾水池,使每天濾水能力增至358萬加侖食水,擴建費用為36

( 3 ) the blockage of filtering bed and the thickening of the argitan can cause the change of hydrodynamic properties in the filtering bed , which leads to the decrease of water quantity ( 3 )濾床堵塞和泥膜增厚可能產生濾床中水動力特征的改變,會產生非飽和流導致出水量的衰減。

Firstly , study the hydrodynamic properties in the filtering bed ; secondly , analyze the influencing factors by the method of numerical simulation with the above mathematical model 第二,應用試驗建立的滲濾取水水文地質數學模型,對滲濾取水的取水量影響因素進行數值模擬分析。

The establishment of the first filter beds - the albany filters 興建第一座濾水廠