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摘要:本次設(shè)計(jì)為大同市給水工程設(shè)計(jì)，設(shè)計(jì)內(nèi)容主要包括三部分，即取水工程設(shè)計(jì)、給水管網(wǎng)設(shè)計(jì)和凈水廠設(shè)計(jì)。該凈水廠處理工藝采用常規(guī)處理，即“混凝——沉淀——過濾——消毒”。 設(shè)計(jì)水廠建于城市的東北角，靠近城市和水源地?；炷ɑ旌虾托跄齼刹糠?。取水工程中采用地表水做水源，根據(jù)水位變化較大，水廠采用固定式取水構(gòu)筑物。由于主流近岸，岸邊有足夠的水深，水質(zhì)地質(zhì)條件較好，所以選擇岸邊式取水構(gòu)筑物。一泵站選取水泵250S24A型單級(jí)雙吸離心泵四臺(tái)，三用一備?；炷捎肞AFC，計(jì)量泵投加，選三臺(tái)AHC62計(jì)量泵，設(shè)計(jì)流量為108 L/h，兩用一備，單臺(tái)泵流量為Q=105L/h。溶液池分三個(gè)格，每格容積為13m3，兩用一備交替使用。 溶解池分三格，每格容積為2.6m3，兩用一備交替使用。設(shè)計(jì)尺寸：L×B×H=1.5m×1.5m×1.5m，包括超高0.3m。設(shè)計(jì)尺寸：L×B×H=2.4m×3m×2.1m，包括超高0.3m。絮凝池采用網(wǎng)格絮凝池，分為4組，絮凝池的有效水深3.6m池的總高H為4.4m，單個(gè)有效尺寸為1.39×1.39米。沉淀池采用斜管沉淀池，分2組，尺寸14×30m，為了配水均勻，進(jìn)水區(qū)布置在30長(zhǎng)的一側(cè)。池子總高度H為4.67m，取5m。沉淀池進(jìn)口采用穿孔墻，排泥采用穿孔管，集水系統(tǒng)采用穿孔管。濾池采用V型濾池，為2個(gè)雙格濾池。反沖洗使用氣水反沖洗，反沖洗水泵選擇泵型號(hào)700HQB—50D，選六臺(tái)，四用兩備。選擇DG型離心鼓風(fēng)機(jī)，選用八臺(tái)，六用兩備。消毒使用液氯消毒，濾池有效工作時(shí)間T=24-24×0.2/48=23.9h，濾池高度3.9m。加氯量Q為3.831kg/h。采用加氯機(jī)投氯，本設(shè)計(jì)選用2J型-2轉(zhuǎn)子加氯機(jī)兩臺(tái)，交替使用。清水池設(shè)為兩座，每座的容積為1/2W=6500m3,尺寸采用40m×40m×4.5m。二泵站設(shè)計(jì)中，選四臺(tái)350S125型泵，三臺(tái)工作，一臺(tái)備用，為調(diào)節(jié)用水不均勻性，其中一臺(tái)水泵設(shè)置變頻調(diào)速裝置。采用連續(xù)式重力濃縮池，設(shè)計(jì)2座，每個(gè)濃縮池面積335.2m2，濃縮池總高度5.8m。取6m。 本給水工程設(shè)計(jì)能夠緩解大同市用水需求，符合其經(jīng)濟(jì)、工業(yè)水平的不斷發(fā)展要求，也有利于大同市的進(jìn)一步發(fā)展要求。 關(guān)鍵詞 管網(wǎng)平差；取水工程；凈水廠設(shè)計(jì)
Abstract:The design of Datong water engineering, design mainly includes three parts, namely, water engineering, water supply network design and purification plant design. The net water treatment process using conventional processing, namely "coagulation - sedimentation - filtration - disinfection." Design waterworks was built in the northeast corner of the city, close to the city and water sources. Coagulation and flocculation comprises mixing two parts. Surface water intake project used to do water, according to water level changes greater use of fixed water intake structures. As mainstream inshore, the shore there is sufficient water depth, water quality, good geological conditions, so select shore style intake structures. . Select a pumping station pumps 250S24A single-stage double suction centrifugal pump four, three and one standby. Coagulation using PAFC, metering pump dosing, the election of three AHC62 metering pump design flow of 108 L / h, Uses a single pump flow rate Q = 105L / h. Solution tank is divided into three cells, each cell volume of 13m3, Uses a used interchangeably. Dissolved pool is divided into three cells, each cell volume of 2.6m3, Uses a used interchangeably. Design dimensions: L × B × H = 1.5 × 1.5 × 1.5, including ultra 0.3m. Design dimensions: L × B × H = 2.4 × 3 × 2.1, including ultra 0.3m. Flocculation flocculation using a grid, divided into four groups, the effective depth of 3.6m flocculation tank total height H is 4.4m, single effective size of 1.39 × 1.39 meters Sedimentation tank using inclined tube sedimentation tank, divided into two groups, the size 14 × 30m, for uniform water distribution, water district arranged in 30 long side. Pond total height H is 4.67m, take 5m. Sedimentation tanks imported perforated walls, mud using perforated pipe, perforated pipe drainage system. Filter using V-filter for the two pairs of lattice filter. Using air and water backwash backwash backwash pump selection pump model 700HQB-50D, choose five, four and one standby. Select DG-type centrifugal blower, use eight units, six with two devices. Disinfection using chlorine disinfection, filter effective working time T = 24-24 × 0.2/48 = 23.9h, filter height 3.9m. Q is the amount of chlorine 3.831kg / h. Dosing of chlorine chlorination machine, the design uses 2J type -2 chlorinator two rotors, are used interchangeably. Set two pools, each block volume of 1/2 W = 6500m3, clear pool size using 40.0m × 40.0m × 4.5m. Two pumping station design, selected four 350S125-type pump, three work, a spare , to regulate the water inhomogeneity, which set up a pump frequency control devices. Using a continuous gravity thickener, design 2, each of the concentrated pool area 335.2m2, concentrated pool total height 5.8m. Take 6m. The water supply project designed to ease the demand for water in Datong, in line with its economic, industrial level of the continuous development requirements, but also conducive to the further development of Datong requirements. Keywords the intake works the water pipe network design the water treatment plant design
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