What Is a Vacuum Sewer System?

"Principle and Design of Vacuum Drainage System" edited by Zhou Jingxuan and others summarized the basic definition and basic theory of the main devices of the vacuum collection and transportation system from the system. The vacuum collection and transportation system is divided into three core functional areas: vacuum station, vacuum pipe network and distributed vacuum terminal, which are introduced in detail. Combined with modern control theory, it describes how to realize the operation monitoring and control of the vacuum collection and transportation system. This book can be read by engineering and technical personnel engaged in municipal engineering and water supply and drainage engineering.

Principle and design of vacuum drainage system

Chapter 1 Overview of Vacuum Drainage System 1.1 Basic Concepts 1.2 Development History of Vacuum Drainage System 1.3 Classification of Vacuum Drainage System 1.4 Composition of Vacuum Drainage System 1.5 Application of Vacuum Drainage System 1.6 Applicability of Vacuum Drainage System Chapter 2 Principles of Vacuum Drain Terminal And Design 2.1 Overview 2.2 Vacuum Water Collection Unit 2.3 Vacuum Toilet 2.4 Vacuum Interface Valve 2.5 Mathematical Model of Vacuum Drain Terminal Chapter 3 Transport Mechanism of Vacuum Drainage Pipeline 3.1 Overview 3.2 Fluid Properties in Vacuum Drainage Pipe 3.3 Flow Characteristics in Vacuum Drainage Pipe 3.4 Stepwise transport mechanism of sewage 3.5 Estimation of system collection radius Chapter 4 Principle and design of vacuum drainage pipe network 4.1 General design process 4.2 Design flow 4.3 Gas-liquid ratio 4.4 Piping design of outdoor system 4.5 Piping design of indoor system 4.6 Hydraulic model and calculation of pipe network Chapter 5 Numerical simulation of vacuum drainage pipeline 5.1 Overview 5.2 Two-fluid model of vacuum drainage pipeline 5.3 Boundary conditions and processing methods 5.4 Simulation of horizontal pipeline 5.5 Simulation of zigzag pipeline 5.6 Simulation of U-shaped lifting pipeline 5.7 Simulation of indoor water collecting unit Chapter 6 Principle and design of vacuum drainage pumping station 6.1 Vacuum station Types and principles 6.2 Equipment selection method 6.3 Mathematical model of vacuum station 6.4 System energy analysis Chapter 7 Design example of vacuum drainage system 7.1 Design process 7.2 Design example 1: Vacuum drainage system of a tourist resort 7.3 Design example 2: Vacuum of an industrial park Drainage system reform Chapter 8 Introduction of vacuum toilet device 8.1 Overview 8.2 Vacuum holding toilet device 8.3 Vacuum push-pull toilet device 8.4 Vacuum online toilet device 8.5 Other forms of vacuum toilet device 8.6 Application example: long-distance bus vacuum toilet Chapter 9 Introduction to the vacuum garbage collection system 9.1 Overview 9.2 Overview of domestic and foreign applications 9.3 Working principle 9.4 System classification 9.5 System characteristics 9.6 Technical key 9.7 Collection range 9.8 Vacuum shredder collection system 9.9 Application examples References Appendix A Vacuum common data table Appendix B Long-distance coach vacuum toilet standard (draft)
Appendix C Design Example-Pipe Network Design

In the 21st century, environmental problems have become prominent, testing human wisdom and ability. Vacuum collection and transportation technology is used for environmental protection and deserves attention and development. Vacuum collection and transportation technology utilizes the concept of vacuum in physics, and uses the pressure difference between vacuum and atmospheric pressure as the power source for transmission to realize the collection and transportation of objects. After more than 100 years of development, vacuum collection and transportation technology has been widely used in indoor sewage, outdoor drainage, mobile toilets, and urban garbage collection. The vacuum drainage system uses vacuum as the power to transport the dirt. The water in it mainly plays the role of lubricating the pipe wall, reducing the resistance of transporting the dirt, and has the outstanding advantages of saving water. In addition, it has the advantages of convenient pipe network laying, small excavation, The advantages of less environmental impact and simple retrofitting process. It is foreseeable that in the near future, the sewage treatment method using a vacuum drainage system will develop into an important way for sewage collection and discharge in China. The vacuum drainage system covers the basic principles of physics, fluid mechanics, water supply and drainage, automatic control and other disciplines. It has strong skills and complexity in design. The technical team of vacuum collection and transportation system of Huazhong University of Science and Technology has engaged in related research for more than 10 years, accumulated some experimental data, theoretical knowledge and design experience, published several scientific and technological papers at home and abroad, and created related intellectual property rights. product. Given that there are not many monographs on vacuum drainage systems at home and abroad. We collated the team's achievements and works, extensively collected relevant literature, filled in the gaps, and compiled this book. The book aims to reflect the current status of research and look forward to the future development of this field. Through this book, we discuss and discuss with domestic and foreign colleagues. The young students provided enlightenment and reference materials to promote the development of vacuum drainage technology in China. The book is divided into 9 chapters. Chapter 1 introduces the preliminary knowledge needed to understand and implement a vacuum drainage system, including the basic concepts, development history, classification, application overview and scope of application of vacuum drainage system. At the same time, in order to give the reader a clear reading idea logically, we divide a typical vacuum drainage system into three core functional areas: vacuum drainage terminal, vacuum drainage pipe network and vacuum pump station. Next, Chapter 2 introduces two common vacuum drainage terminals-vacuum water collection unit, vacuum toilet and its special valve. In order to describe the operation process of these drainage terminals quantitatively, their mathematical models are introduced respectively. In Chapter 3, the design principle, fluid and flow characteristics, and step-by-step transport mechanism of the vacuum drainage pipeline are explained. Finally, the collection radius of the vacuum drainage system is estimated. Chapter 4 introduces the vacuum drainage pipe network, which includes the largest coverage area, the most close contact with users, and the most complicated mechanism in the vacuum drainage system, including its design process, design regulations and calculation methods. Chapter 5 introduces the latest development of a vacuum drainage pipelinea gas-liquid two-phase fluid model and its numerical simulation techniques. Using this method, numerical experimental research is conducted on the transport mechanism and typical scenarios of indoor and outdoor vacuum drainage pipes. Chapter 6 introduces several common types of vacuum pumping stations, introduces equipment selection methods by examples, proposes a mathematical model of the vacuum pumping station, and analyzes the energy consumption of the system. Chapter 7 is an introduction to design examples. The intention is to give readers a more intuitive understanding through a complete description of actual engineering design. Chapter 8 provides a separate introduction to the vacuum toilets currently widely used in railway passenger cars, coaches, and mobile trailers. Chapter 9 is an extension of the previous content. It introduces the application of vacuum collection and transportation technology in urban garbage collection. It aims to expand readers' thinking, and point out the direction for learning and developing a variety of vacuum collection and transportation technologies and opening up the future market of vacuum collection and transportation. The appendix gives the common data related to the design and calculation of vacuum drainage, the extension of Chapter 8the standard for long-distance coach vacuum toilets (draft), and the pipe network design diagram in Chapter 7 Design Example. The content of this book can be used as a reference reading for undergraduates and graduate students majoring in environmental engineering, water supply and drainage in colleges and universities, and also for technical personnel engaged in municipal engineering, water supply and drainage engineering. While we adhere to scientific rigor and authority in writing, we also strive to have a certain degree of interest and readability: For those content that has become the basic norms of the industry, such as design specifications, parameter calculation and other formulas and methods, truthfully, Detailed expressions; for those theories and methods that are still being researched and explored, such as the modeling of vacuum drainage systems, numerical simulation of vacuum pipelines, etc., the truth is explained in the text and provided to readers for reference and discussion; You can slightly reduce the content of seriousness, for example, when introducing the system's overview, development history, and application prospects, appropriately add some interesting extended reading materials beside the text; in the writing style, avoid sitting tight and writing everything Too formulaic, book-oriented. When it is popular, it is popular, when it is rigorous. Due to the rapid development of information technology, and because the contents of this book involve different disciplines such as environmental engineering, water supply and drainage, and control theory, it is inevitable that there are omissions in the preparation of this book. Please enlighten me. Thanks to the guidance of Professor Yang Guozhu and Huazhong University of Science and Technology Press during the writing of this book. This book is dedicated to all those who have worked and studied in the vacuum collection and transportation system team of Huazhong University of Science and Technology.