Industrial Electrostatic Precipitator Application Technology

Author: Tang Guoshan, Editor-in-Chief
Publisher:
Publishing Date: 2006-02-01
Features: This book comprehensively and thoroughly introduces the achievements of self-experiment and research on industrial electrostatic precipitators in China in various industrial sectors such as thermal power, cement, metallurgy, and chemical industry. It also covers the domestication of advanced foreign technologies after absorption, digestion, and improvement, as well as the series product design and application results based on these achievements, extending to new application fields. Additionally, it systematically elaborates on the basic principles and power supply of electrostatic precipitators, the mechanical structures of various types of products, the experience and technical requirements in the manufacturing, installation, operation, and management of electrostatic precipitators, the scientific research achievements, design outcomes, and design principles of electrostatic precipitators, as well as the practical applications, evaluation indicators, and performance testing of electrostatic precipitators in various industrial sectors. The book also lists the "National Environmental Protection Best Practical Technology Extension Project" (Electrostatic Precipitator Section) selected over the years. This book focuses on practicality. At the back, it includes the newly revised and implemented air pollutant emission standards for the cement industry, industrial furnaces, and thermal power plants as reference materials for comparison. This book can serve as a specialized reference tool for environmental protection professionals engaged in the research, design, and application of electrostatic precipitators, as well as for faculty and students in universities and colleges majoring in environmental protection and related fields. [Preface] Electrostatic precipitators are internationally recognized as highly efficient dust collectors, having been in operation for 100 years in industry, fulfilling their mission of purifying flue gas, capturing particulate matter, and protecting the environment. The 20th century was a period of peak development for electrostatic precipitators, coinciding with rapid economic growth, scientific and technological advancements, and severe destruction of social and natural environments, as well as pollution of the atmosphere essential for human survival. As humanity enters the 21st century, the three major global issues of greenhouse effects, ozone layer depletion, and acid rain remain extremely serious, and the requirements for environmental sustainability are becoming increasingly stringent. Today, the task of controlling air pollution has gradually shifted from primarily treating smoke (dust) to a balanced approach of treating smoke and dust as well as harmful gases (SO?, NOx, F). The application and research and design of electrostatic precipitators in China began in the 1950s and have since undergone 50 years of development, achieving remarkable results and surpassing others, summarized in 12 words: "Late start, rapid development, high standards, surpassing peaks." China has now joined the ranks of international advanced technology. As a major coal-producing and coal-consuming country, China ranks first in both categories worldwide. Therefore, the smoke and dust emitted by coal-fired boilers and industrial furnaces belong to coal-fired air pollutants. Power plants are the largest emitters of smoke and SO? in China, accounting for 74% of the country's total energy capacity (2002 data). Since 1980, the installed capacity of thermal power generation units in China has increased by 5.66 times. Due to the installation of electrostatic precipitators in large and medium-sized power boilers, the emission of air pollutants has actually decreased by more than double. According to national statistics, China's particulate matter emissions from air pollution in 1981 were 17.43 million tons, of which 15.49 million tons were smoke and dust. In 1985, particulate matter emissions reached 28.48 million tons (estimates at the time suggested they could reach 44.74 million tons by 2000). By 2001, emissions were 22.87 million tons (including 10.75 million tons of smoke and dust and 12.12 million tons of dust), a reduction of 5.61 million tons compared to 1985. This was the result of the widespread adoption of electrostatic precipitators and other dust removal devices in China. To implement the "Air Pollution Prevention and Control Law of the People's Republic of China," prevent environmental pollution, protect and improve living and ecological environments, and safeguard human health, the National Environmental Protection Administration has revised the air pollutant emission standards for power plants, cement industries, and industrial furnaces, aligning them with international standards. This undoubtedly presents a challenge and an opportunity for electrostatic precipitators. The newly revised "Air Pollutant Emission Standards" not only specify particulate pollutants but also set standards for harmful gases such as sulfur dioxide, nitrogen oxides, and fluorides. Electrostatic precipitator technology has evolved from basic particle collection to treating harmful gases, with effective removal of gases like SO? and NOx, and integrated dust removal and desulfurization systems have also been developed. However, the treatment tasks remain arduous. China's electrostatic precipitator technology and products have reached international advanced levels, with the industry being the most robust, large-scale, and competitive in the environmental protection sector, capable of competing with foreign products. China has become a major country in the application and production of electrostatic precipitators. The development of electrostatic precipitators to its current state is the result of decades of hard work and unremitting efforts by multiple generations. The older generation contributed labor and wisdom, and their contributions continue to be valuable today. The younger generation of scholars and rising stars are striving and have already emerged. However, as a whole, there are still gaps in electrostatic precipitators. Research and experiments on fundamental theories need further improvement, the best practical technologies need broader application, new application fields need to be explored, and both old and new electrostatic precipitators need to be improved for higher efficiency and reduced emissions. All of these issues. To achieve the above goals, the author, based on decades of experience in scientific research and design of electrostatic precipitator technology, participation in domestic and international academic exchanges, and attendance at national electrostatic precipitator academic conferences, as well as involvement in or chairing technical evaluation meetings, has comprehensively and systematically summarized the achievements and applications of electrostatic precipitators over the past 50 years, contributing a small part of his efforts. It is hoped that this book will inspire and provide references for professionals in this field. Starting from practicality, the book focuses on presenting the core application technologies of electrostatic precipitators in the industry in a concise and to-the-point manner, supplemented by chapters on manufacturing and installation, as well as evaluation and testing, to ensure completeness. It briefly introduces the principles, structures, design principles, and operational management for reference. Due to the author's limitations and the limited availability of materials, some omissions and subjective interpretations may exist. The author sincerely invites readers to provide feedback and corrections. During the writing process, the book was supported by many colleagues and scholars, and their contributions are deeply appreciated. The materials on non-ferrous metals were kindly provided by the scholar Cheng Yicong, for which the author expresses his gratitude.