There are few listed companies producing desulfurization equipment, mainly Katie Power, Ziguang, Laigang, Great Wall Electric, Kowloon Electric and Guodian Electric. Among them, Laigang shares are the strongest. Laigang Co., Ltd. (600 102): The company uses the engineering technology of removing sulfur dioxide from boiler flue gas (75t/h) from coking ammonia-containing wastewater, realizing zero emission of sulfur dioxide from boiler flue gas in Laigang, and puts forward a demonstration project to achieve the goal of sulfur dioxide pollution control. It can reduce sulfur dioxide emission 1.300 tons per year, treat 45,000 cubic meters of coking wastewater containing ammonia, and incinerate flue gas and desulfurization products in the furnace to avoid secondary pollution. Its direct economic benefit is far greater than 773,800 yuan/year. This technology is the first in China and has reached the international advanced level. Thunis (0938): The basic orientation of environmental protection industry is "to provide comprehensive treatment technology for urban environment", and the outstanding urban environmental protection problem is the breakthrough. The company has a leading technology in integrated desulfurization and dust removal. The company provides technical services for flue gas desulfurization and dust removal, independently owns integrated equipment for desulfurization and dust removal, and contracts flue gas desulfurization and dust removal projects. Great Wall Electrician: Recently, it cooperated with Lanzhou Institute of Modern Physics of Chinese Academy of Sciences to undertake the flue gas desulfurization project of a power plant in Zibo. The project invested more than 70 million yuan and adopted electron beam desulfurization technology. This project is the first flue gas desulfurization project in China at present. The estimated income exceeds 20% of the investment, and the construction period is one year. Kowloon Electric Power: investment holding Yuanda Group, mainly engaged in the industrialization of flue gas desulfurization technology and equipment, is an enterprise integrating process design, technology introduction, complete equipment development and manufacturing, construction and installation, commissioning and maintenance, and personnel training. At present, the industrialization project of flue gas desulfurization technology and equipment is being organized and implemented. It is planned to introduce FGD technology from Mitsubishi Heavy Industries, Japan, and gradually realize the localization of all desulfurization technologies and equipment in three stages. Through localization, the price of sulfur dioxide desulfurization equipment for 300MW thermal power units can be reduced from the import price of 300-400 million yuan to 65.438+400 million yuan. At present, the listed companies involved in flue gas desulfurization are Guodian Power, and Guohua Renyuan Company is preparing to produce such products. Because the technology used in flue gas desulfurization of large power plants in China has not passed the standard, the investment in imported equipment is large and the cost is too high, so there are not many listed companies involved in this field. However, with the implementation of national environmental protection policies and regulations, the investment in desulfurization will continue to increase, and the huge profit market of flue gas desulfurization will be valued and set foot in by more and more companies. At present, Electric Group and Ishikawa Island Co., Ltd. have jointly established an environmental protection company focusing on flue gas desulfurization, and Shanghai Electric Machinery Factory Co., Ltd. has also cooperated with China University of Science and Technology to develop an electron beam desulfurization device. Recently, Shanghai Environmental Protection Machinery Engineering Company began to develop electrostatic precipitators for 10 0 kW thermal power units on the basis of providing more than 700 electrostatic precipitators for power plants and steel mills. These phenomena mean that with the development of market, the maturity of domestic technology and the reduction of investment cost of flue gas desulfurization, the factors restricting desulfurization in power plants will gradually disappear, and the resulting direct and indirect economic benefits will become greater and greater. Therefore, it can be said that flue gas separation is a dynamic field of environmental protection.