高密度澄清池.doc
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1、Densadeg Clarifier高 密 度 澄 清 池 An extremely dense and homogenous floc高度密集而且均匀的矾花 Optimized flocculation reaction最优化的絮凝反应 A high settling rate极高的沉淀速率 A high degree of facility compactness高度紧凑的结构 Perfectly controlled recirculation flow完美的回流控制 Virtually ultimate sludge thickening彻底的污泥浓缩 Sludge dewatered
2、 without any intermediate thickener污泥脱水无需预浓缩 Excellent clarified water quality 卓越的出水水质 Low sensitivity to loading and flow rate fluctuations 耐负荷及流量变化冲击CONTENTS目录GENERAL INTRODUCTION简介35Propose of settling沉淀目的35Lamellae settling斜管沉淀35Densadeg briefing高密度澄清池简介36Integrated flocculation zone集成式絮凝区36Sett
3、ling zone沉淀区36Sludge thickening zone污泥浓缩区37Details of Densadeg高密度澄清池详述37Sketch of Densadeg高密池简图37Process Composition工艺组成38Flash mixing tank快速搅拌池38Reactor tank反应池39Reactor turbine speed反应池搅拌器速度39Sludge recirculation污泥回流40Settling tank沉淀池40DESIGN BRIEF设计简介41Process flow工艺流程41Design parameters设计参数41Rea
4、ctors反应池41Settling tanks沉淀池41Clarified water collection troughs集水槽42Oil skimmer 撇油器42Grease tanks浮油池42Sludge recirculation pump污泥回流泵42Sludge extraction pump污泥排放泵43Standby sludge pump备用污泥泵43Post coagulation后混凝43Design for automation自动化设计43Lime dosing石灰投加43Coagulant dosing混凝剂投加43Flocculant dosing絮凝剂投加
5、44Sulfuric acid dosing硫酸投加44Start/stop of reactor agitators反应池搅拌器的启停44Start/stop of sludge scrapers刮泥机的启停44Sludge recirculation污泥回流44Sludge extraction污泥排放44Scum removal浮渣去除44Start/stop of post-coagulation agitators后混凝搅拌器的启停45Design for safety安全设计45Lack of coagulant or flocculant缺少混凝剂或絮凝剂45Sludge lev
6、el in settling tank too high沉淀区泥位过高45Sludge level in settling tank too low沉淀区泥位过低45Torque on sludge scraper drive too high刮泥机驱动器扭矩过高45Level in oil storage tank too high储油池液位过高45Poor treatment quality处理效果差46MAIN EQUIPMENT主要设备47Flocculator反应池47Isolation of Densadeg inlet 高密池进水闸板47Flocculation turbine絮
7、凝搅拌器47Densadeg reactor中心导流筒48Drain valve for flocculation zone絮凝区放空阀48Clarifier澄清池49Sludge scraper刮泥机49Drive unit of sludge scraper刮泥机驱动器49Lamellar module 斜管50Outlet trough集水槽50Drain for Densadeg高密池放空阀50Partial drain for Densadeg高密池部分放空阀51Sludge recirculation & extraction污泥回流和排放51Sludge recirculatio
8、n pump回流污泥泵51Sludge extraction pump污泥排放泵52Standby sludge pump备用污泥泵53Sludge level detector泥位计54Suction valves of sludge pumps污泥泵吸口阀门55Delivery isolation of sludge pump污泥泵出口隔离阀56Scum removal浮渣处理56Grease removal skimmer撇油器56Mixer in grease tank浮油池搅拌器57Scum pump浮渣泵58Level switch液位开关59Post-cogulation后混凝5
9、9Mixer for post-coagulation后混凝搅拌器59pH meter for Densadeg outlet高密池出水pH计60pH meter for pH regulation调节用pH计60Drain for post-coagulation tank后混凝池放空阀61CHAPTER 1第1章1GENERAL INTRODUCTION简介Propose of settling沉淀目的Settling is the separation technique often used for SS and colloids (collected in the form of f
10、loc after the coagulation-flocculation stage) removal.沉淀是一种常用于悬浮颗粒物及胶体(在混凝-絮凝后表现为矾花的形式)分离的工艺。Lamellae settling斜管沉淀For horizontal flow settling tanks, the only basic size factor is the horizontal settling area (SH). A discrete particle is retained if its settling velocity is higher than the Hazen vel
11、ocity (VH).对于平流沉淀池,其唯一的基本参数为沉淀面积(SH)。如果颗粒物的沉降速度大于哈真速度则可以在池中沉淀。Theoretically, the retention of particles does not depend on the height of the appliance. Thus, in horizontal flow settling, it is theoretically possible to achieve the same results in treating:理论上颗粒物的沉淀与设备的高度无关,因此下列方法在理论上可以达到同样的处理效果: A f
12、low nQ in the same appliance by superimposing n levels of elementary height H/n将设备分为n层则同样的设备可以处理n倍的水流量。 The same flow Q by superimposing n levels of elementary height H/n and of length L/n同样的水流量可以用分为n层但长度只为原长1/n的设备处理。 In practice, superimposing horizontal settling tanks without a scraping system doe
13、s not allow for efficient sludge removal, and thus leads to reduced performance实践上,无刮泥系统的多层平流池因不能有效地排泥而降低性能。The use of lamellae settling consists in multiplying the surfaces of water-sludge separation in one unit. Therefore, positioning lamellae packs (parallel tubes or plates) in the settling zone
14、creates a large number of elementary separation cells. In order to provide for the evacuation of the sludge, it is necessary to incline the lamellae at an angle to the horizontal.斜管沉淀池中可用于泥水分离的面积为普通沉淀池的数倍,斜管中包含了大量的相互独立的沉淀单元。斜管应与水平面成一定的夹角以便于排泥。Densadeg briefing高密度澄清池简介Degrmont presents its new Densad
15、eg system with advanced technology, which could be used in a vast field of applications, such as the drinking water, wastewater, industrial water, and sludge treatment. The Densadeg is a patented settling tank with external sludge recirculation.得利满公司运用先进技术开发出崭新的高密度澄清池系统,该系统应用面广泛,适用于饮用水生产、污水处理、工业废水处理
16、和污泥处理等领域。高密度澄清池带有外部泥渣回流的专利澄清技术。高密度澄清池亦简称为高密池。The Densadegs success is based on its three technologically complex modules:高密度澄清池的成功取决于下列三个技术组合模块:Integrated flocculation zone集成式絮凝区It is designed for both rapid flocculation with sludge recycling and slow flocculation for floc growth, and composes 2 rea
17、ctors in series:设计包括与回流污泥的快速絮凝和矾花增长所需的慢速絮凝,由两个连续的区域构成: The 1st is agitated, ensuring fast flocculation by means of an axial flow impeller installed inside a duct providing a homogenous mixing action and the energy required for flocculation. The flocculent is injected into the base of the turbine and
18、 the piping of recirculation sludge (the coagulant is injected upstream from the Densadeg). External sludge recirculation continues from the thickener zone to the 1st reactor, thus the high sludge concentration enhances flocculation performance.第一级絮凝在一个筒状区域内进行并由一个轴流推进器进行搅拌,以确保快速絮凝及絮凝所需要的能量。絮凝剂投加在搅拌器
19、的下面和回流污泥的管道上(混凝剂投加在高密池的上游)。从污泥浓缩区到第一级絮凝区进行连续的外部泥渣回流,极高的污泥浓度提高了絮凝的效果。 The 2nd provides a slow flocculation; the resultant floc has a high level density. Then water slowly transfers to the settling tank to maintain floc integrity.在第二个区域中进行慢速絮凝;生成的矾花具有较高的密度。然后水慢速流至沉淀区以保证矾花的完整性。Settling zone沉淀区It is com
20、posed of 2 settling sub-zones: 沉淀区由两部分组成: Hindered settling beneath the lamellar: most of the floc settles in this area.斜管下方的成层沉淀:大部分矾花在此区域中沉淀。 Backflow lamellar settling: settling surface area is increased by using lamellar (hexagonal) modules, used to operate at high velocities. The residual floc
21、is removed in this module producing the final quality water.斜管澄清模块:使用斜管增大了沉淀面积,用于高速运行。在这个模块中,残留的矾花被去除并生产合格的出水。Sludge thickening zone污泥浓缩区Floc accumulates in the base of the settling tank where it thickens in two superimposed bands limited by the recirculation cone:矾花沉积在沉淀池底部,并在那里由于回流锥的限制分两层进行浓缩: Upp
22、er band: the recirculated sludge transit and concentration zone where the sludge remains for several hours.上层:回流污泥通过浓缩区并停留几个小时。 Lower band: final sludge thickening before blowdown extraction, contact time of approximately one week.下层:在排泥前进行最终的浓缩,停留时间大约为一周。Sludge is collected by gravity or by a skimm
23、er system equipped with a picket fence in order to promote thickening. A positive displacement pump then routes the sludge to the flocculation zone inlet.污泥通过重力或一个带有篱栅的刮泥机收集起来。一台螺杆泵将部分污泥回流至絮凝区。Details of Densadeg高密度澄清池详述Sketch of Densadeg高密池简图A12345B6CD71Coagulant injection混凝剂投加7Outlet channel出水渠2Fl
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