环境工程设备第3章课件1

1、3 容器设计实例1中、低压容器设计实例Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd. 工艺设计条件某印染废水处理站采用生化处理工艺，产生的含水率98%以上的生物污泥拟用板框压滤机脱水，根据工艺计算知：板框压滤机每一工作循环可处理含水率98%生物污泥5m3,采用气压式进泥罐将污泥加压后送入板框压滤机，所压进泥罐为立式，筒体内径为1600 mm，高度2500 mm，在常温下工作，安装在脱水机房操作平台的混凝土楼板上，其

2、最大工作压力为w=1.0MPa，试设计该气压进泥罐。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2 设计步骤及图纸2.1 钢板的选择: 污泥无腐性常温低压 属低压容器可选择碳素结构钢板235-A (s=235MPa, b=375MPa) 或低合金钢容器专用钢板20R (s=245MPa, b=400MPa)比较：价格相近，20R强度高Evaluation only.Created with Aspose.Slid

3、es for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.许用应力则20R的许用应力:=s/ ns=245/1.6=153 MPa =b/ nb=400/3.0=133 MPa取较小值133 MPa安全系数：ns 1.6, nb3.0Evaluation only.Created

4、with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2.2 罐体壁厚设计条件最大工作压力Pw=1.0 MPa,以装安全阀考虑,最大设计压力为Pw的1.051.1倍,则: P=1.1 1.0 MPa= 1.1 MPa已知内直径:Di=1600 mm焊接接头系数=1.0腐蚀余量:C2=1.0 mmEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright

5、2019-2019 Aspose Pty Ltd.设计罐厚设计壁厚:钢板负偏差:C1=0.8 mm,钢板圆整后的名义厚度Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2.3 封头形式与壁厚拟采用标准椭圆形封头设计壁厚:焊接接头系数=1.0 双面焊或相当于双面焊的全熔透对接接头考虑C1及圆整,取n=10 mm,与壁厚相同Evaluation only.Created with Aspose.Slides for .N

6、ET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2.4 校核罐体与封头水压试验强度水压试验时,罐体与封头应力按:PT=1.25P=1.83 MPa,污泥静压P1=0.03 MPa,e=n-C=10-1-0.8=8.2 mm, s=245 MPaEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.钢板厚度偏差Evaluation only.C

7、reated with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2.5 支座的选择根据题意:立式、无保温层、直接安放在楼板上，选用型耳式支座进泥罐总质量：m=m1+m2+m3+m4式中：m1为罐体质量，m2为封头质量，m3为污泥质量，m4为附件质量m1：附录15， m1q1H=3972.5=992.5 kgm2：附录15， m22q2=2237=474 kgEvaluation only.Created with Aspose.Slides for .NET 3.5

8、 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.污泥质量m3m3： m3Ve Ve=Vf+Vt总高度：=Ht+2Hf=2.5+2(0.4+0.04)=3.38 m总容积：V=Vf+Vt=20.617+2.52.017=6.28 m3污泥高度以4/5计，则筒体储泥高度：Ht=3.380.8-(0.4+0

9、.04)=2.26 mm3=Ve=(Vf+Ht 2.017) =1000(0.617+2.262.017)=5175 kgEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.人孔质量：200 kg

10、各种接管、视镜质量：200 kg m4=200+200=400 kg进泥罐总质量： m=m1+m2+m3+m47042 kg附件质量m及总质量mEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.一台气压进泥罐设个型耳式支座，同时受力可能只有两个，则每支座承受负荷：mg/2=7042 9.8/2=35 kN材料为235-AF，每个支座承受负荷60 kN标记：JB/T 4725-92耳式支座4，=8 mm支座受力情况Eva

11、luation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.B型耳式支座Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.气压进泥罐内部无零部件，则封头与罐体直接焊接，但设人孔以利清洗常温下，气压进泥罐最高工作压力为1.0MPa,人孔也应按公称压力PN1.0M

12、Pa选用。为检修方便，选DN450、PN1.0垂直吊装盖板平焊法兰人孔。 =8 mm，材料20R,标准号：HG21532-95 人孔开孔处补强：等面积补强。补强圈材料20R, =10 mm，补强圈外径：760 mm, 内径：480 mm2.6 人孔及补强Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2.7 接管主要有以下接管1.污泥进料管：采用108 5 mm无缝钢管，设于顶部封头中心位置因罐体n=10 mm80

13、mm,需对开孔处补强 补强圈外径：210 mm, 内径：112 mm, =10 mmEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.2.污泥出料管：采用108 5 mm无缝钢管，设于底部封头中心位置污泥出料管DN=100 mm,需对开孔处补强 补强圈外径：210 mm, 内径：112 mm, =10 mm接管Evaluation only.Created with Aspose.Slides for .NET 3.5

14、 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.接管3.压缩空气进口管：采用38 3 mm无缝钢管，设于顶部封头上因罐体n=10 mm12 mm，接管DN=32 mm80 mm,不需对开孔处补强Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.接管4. 气体放空管：采用38 3 mm无缝钢管，设于顶部封头上因罐体n=10 mm12 mm，接管DN=3

15、2 mm80 mm,不需对开孔处补强5.安全阀接管：采用25 2.5 mm无缝钢管，设于顶部封头上因罐体n=10 mm12 mm，接管DN=20 mm80 mm,不需对开孔处补强Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.接管6.视镜接口：罐中污泥流动性差，易黏附在液面计上的玻璃管上，甚至堵管，所以不用玻璃管液面计。而选用带冲洗管的视镜。安装高度：罐体总高度4/5处，DN150mm，PN1.0MPa, 不需对开孔

16、处补强7.压力计接管：采用DN15带螺纹钢管，设于顶部封头上。不需补强Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.设备施工图由设备总装配图和零部件图组成零部件图详细给制和标明每个非标准零部件的形状、尺寸、材料、加工要求等总装配图则绘制和标明设备的总体形状、尺寸，各零部件的名称、规格、尺寸、材料（包括标准零部件）及其在设备上的安装位置和方位。此外，总装配图还包括必要的文字说明（技术要求）和表格（技术特性表、接管表、

17、材料明细表等）2.8 绘制设备施工图Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.本例包含内容如下：技术要求技术特性表接管表材料明细表气压进泥罐总装配图绘制设备施工图Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.技术要求Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile .Copyright 2019-2019 Aspose Pty Ltd.技术特性表Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profi