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200m3/h水泵提升式调量池建模与设计 毕业设计(论文)说明书
摘要
污水处理要求运行平稳，各种运行参数都好控制，以降低运行成本。在此过程中，调节池的作用尤为突出。调节池是指调节水量和水质的构筑物，它的作用是对水量和水质的调节，调节污水pH值、水温，有预曝气作用，还可以用作事故排水。
本课题通过改进已建立的泵提升式调量池的数学模型进一步研究进水量发生变化时调量池水位以及泵的出流量随时间的变化过程。通过实体模型实验研究数学模型中涉及到的、可能对泵的出流量产生影响的因素，并验证推导的数学模型的可行性。
本课题通过实验和模拟得出的结论，对现有池型进行改造和分析，发现可能存在的问题，并提出改进措施，完成泵提升式调量池的优化设计。
根据实验结果，得出以下结论：
（1）建立了进水量发生变化时调量池水位以及泵的出流量随时间的变化的数学模型；
（2）调量池的水位与管道S值是影响泵出流量的重要因素； （3）根据数学模型，工程实际中应使泵在其高效段出水； （4）工程实际中泵提升式调量池的池底面积尽可能大一些；
（5）根据数学模型表达式是否有意义可以估计泵提升式调量池可以调节的水量范围。
关键词：泵提升式调量池、水量波动、稳定出流、数学模型、仿真模拟
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200m3/h水泵提升式调量池建模与设计 毕业设计(论文)说明书
Abstract
Sewage disposal requires smooth operation and all kinds of operation parameters are under good control in order to reduce operation cost. During the process, the role of regulating pondage is excessively outstanding. Regulating pondage is one kind of structure that can be used to regulate water quality and quantity, sewage pH value, water temperature and preaeration. It also can be used to accident drainage.
By improving the mathematical model of pump ascension adjustable volume pool that has been established, we research the change process of water level and pump discharge when the water inflow varies from the time. Through entity model experiment we research factors that possibly affect the pump discharge that is related to the mathematical model. And we also validate feasibility of the mathematical model.
According to the conclusion from experiment and simulation, we can analysis and improve existing pool type, find potential problems and propose improvement measurements in order to complete optimal design of pump ascension adjustable volume pool.
According to the result of experiment, the conclusions are as follows:
(1) We have established a mathematical model that describes the change process of water level and pump discharge when the water inflow varies from the time.
(2) The water level of adjustable volume pool and S value of the tunnel are the important factors that can affect pump discharge;
(3) According to the mathematical model, in the project, the pump should work in efficient stage。
(4) In the project, the bottom acreage of adjustable volume pool should be as big as possible.
(5) According to whether the mathematical model is meaningful, we can estimate the flow range that the adjustable volume pool can regulate.
Keywords: pump ascension adjustable volume pool; water fluctuations; stability of the flow; mathematical model; analogue simulation
目录
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200m3/h水泵提升式调量池建模与设计 毕业设计(论文)说明书
摘要 ....................................................................................................................................... 1 1. 绪论 ................................................................................................................................ 5
1.1. 世界水资源现状 .................................................................................................. 5 1.2. 我国水资源现状及水污染治理 .......................................................................... 5 1.3. 调节池的研究背景 .............................................................................................. 5 1.4. 调节池的研究现状 .............................................................................................. 6
1.4.1. 调节池有效容积的计算 ........................................................................... 6 1.4.2. 调节池水力特性的研究 ........................................................................... 8 1.5. 调节池的分类 .................................................................................................... 10
1.5.1. 水质调节池 ............................................................................................. 10 1.5.2. 水量调节池 ............................................................................................. 11 1.6. 课题研究内容和意义 ........................................................................................ 13 2. 泵提升式调量池数学模型的建立 .............................................................................. 15 2.1. 数学模型与数学建模 ........................................................................................ 15 2.2. 调节池的数学建模 ............................................................................................ 15 2.3. 泵提升式调量池数学模型的建立 .................................................................... 16 3. 泵提升式调量池实体模型实验 .................................................................................. 21
3.1. 实验目的 ............................................................................................................ 21
3.2. 实验原理 ............................................................................................................ 21
3.2.1. 离心泵装置的工况点 ............................................................................. 21 3.2.2. 离心泵出水流量的改变 ......................................................................... 23 3.3. 实验装置与实验器材 ........................................................................................ 24
3.3.1. 实验器材的选用 ..................................................................................... 24 3.3.2. 实验所需材料表 ..................................................................................... 25 3.3.3. 实验装置的连接 ..................................................................................... 26 3.4. 实验准备 ............................................................................................................ 27 3.5. 具体实验部分 .................................................................................................... 27
3.5.1. 初始进水量Q10下泵的工况点的测定 ................................................... 27 3.5.2. 静扬程的变化对泵出流量的影响 ......................................................... 32 3.5.3. 管道闸阀调节对泵出流量的影响 ......................................................... 38 3.5.4. 进水流量呈矩形波变化时调量池水位与泵出流量的变化情况 ......... 45 3.6. 基于LabVIEW的仿真模拟 ............................................................................. 48
3.6.1. LabVIEW及其在工程上的应用 ............................................................ 48 3.6.2. 使用LabVIEW模拟进水流量呈矩形波变化时泵出流量随时间变化的关系 49
3.6.3. 使用LabVIEW模拟调量池面积变化时泵出流量随时间的关系 ....... 50 结论和建议 ......................................................................................................................... 52
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