Power Station Auxiliary Equipment

The main auxiliary equipment of power plants includes: boiler slag removal equipment, boiler ash removal equipment, coal conveying and crushing equipment, water treatment equipment, smoke and air duct series equipment, electric valve devices. Narrowly defined, power plant auxiliary equipment refers to coal mills, supply fans, induced draft fans, boiler feed pumps, and high-pressure heaters, which are referred to as the five major auxiliary equipment by industry insiders. the reason why

The main auxiliary equipment of the power station includes: boiler slag removal equipment, boiler ash removal equipment, coal conveying and crushing equipment, water treatment equipment, flue gas duct series equipment, electric valve device

Narrowly defined power plant auxiliary equipment refers to coal mills, forced draft fans, induced draft fans, boiler feedwater pumps, and high-pressure heaters, which are referred to as the five major auxiliary equipment by industry insiders. The reason why it is called the five major auxiliary machines is that it has high reliability requirements, which are directly related to the operation of the unit and are included in the reliability assessment; Secondly, the difficulty of equipment manufacturing is high; Thirdly, the high consumption of factory electricity affects the efficiency of the unit. In a broad sense, auxiliary equipment in power plants, except for the three main engines, are all auxiliary equipment, involving many categories. According to the new requirements for environmental protection of power plants, desulfurization equipment for power plants has also been included in the category of large auxiliary equipment. As a sub industry of power station equipment manufacturing in the manufacturing industry, the importance of auxiliary equipment is self-evident. These devices have high reliability requirements, which directly affect the efficiency of the unit and are included in the reliability assessment. The equipment manufacturing is difficult, the technical content is high, and it is also a key focus of energy saving. According to relevant statistical data, in recent years, the number of power plant auxiliary equipment such as coal mills, air supply fans, induced draft fans, boiler feed pumps, and high-pressure heaters that are used in conjunction with power generation equipment has been increasing year by year. In terms of value, the main engine and auxiliary engine each account for half of the equipment investment, indicating that the auxiliary engine of the power station occupies a considerable position.

The domestic power plant auxiliary equipment industry has gone through three stages of development, mainly represented by large auxiliary equipment. In the 1980s, thermal power construction mainly relied on 200000 kilowatt units as the main models, with imported main auxiliary equipment. In the 1990s, thermal power construction basically began with 300000 kilowatt units as the main model, introducing and digesting foreign technology, and entering the stage of domestication of auxiliary equipment. In the 21st century, thermal power construction mainly relies on 300000 and 600000 kilowatt units as the main models, and auxiliary equipment enterprises begin to rely on foreign technology as support and participate in market competition through joint ventures. A series of changes have also created good opportunities for supporting auxiliary equipment. Power plant auxiliary equipment production enterprises mainly have the following opportunities:

1. With the rapid development of China's power construction, large capacity and high parameter generator sets are becoming increasingly popular. New technologies and energy are gradually being promoted and utilized, and efficient and environmentally friendly new units are also emerging. China's power construction has developed rapidly. As of the end of 2006, the country's installed power generation capacity reached 662GW, of which 484.05GW was thermal power, accounting for 77.82%; 128.57GW of hydropower, accounting for 20.67%; Nuclear power and others account for 1.51%. It is predicted that the installed power generation capacity in China will exceed 840GW in 2010.

The popularity of large capacity and high parameter units, especially million level units, has increased, resulting in a sharp decrease in the number of supporting units. The single machine capacity of auxiliary equipment has also increased, and new equipment supporting them continues to emerge. In the main auxiliary equipment, fan equipment such as primary fans, pump equipment such as feedwater pumps, condensate pumps, circulating water pumps, various heat exchanger equipment, and main transformers and plant transformers in electrical supporting equipment have all increased their capacity due to the enlargement of the main unit. And equipment such as boiler water circulation pumps need to be increased in quantity. In addition, some auxiliary machines in the million kilowatt level units have not yet been developed in China, which brings both challenges and opportunities to domestic auxiliary machine manufacturers.

2. In order to achieve energy-saving goals, power plants increasingly use hydraulic couplings and frequency modulation motors, such as fans, feedwater pumps, condensate pumps, slurry pumps, etc. Pneumatic feedwater pumps are also used instead of electric feedwater pumps, and bag filters are used instead of electrostatic precipitators. In addition, in the ash and slag removal system, a large number of dry ash and slag removal equipment are used instead of hydraulic equipment, and energy-saving high-voltage power supply devices are used in electrostatic precipitators. The power plant also extensively uses effect devices, sound insulation devices, and suction devices. Especially for gas combined cycle units, the air inlet adopts a silencing device, and the walls of the main plant are made of small hole suction materials, which basically meet the national noise emission standards. The sound insulation wall scheme for waste heat boilers and cooling water towers, which could only be seen abroad, has also been applied in domestic power plants.

3. The power plant also needs to adapt to the group's networked management needs and establish a digital power plant. This requires standardized management of main and auxiliary equipment, establishment of power plant computer models and databases. Therefore, how to accelerate technological progress and meet the needs of digital power plant construction and process system control is also an important issue that domestic auxiliary equipment factories should consider.

The development of electricity has achieved great success so far, and high parameters and large capacity have become the trend of ending development. Auxiliary equipment must adapt to the needs of large capacity units, meet the supporting requirements of different forms of power generation, and also meet environmental protection requirements, especially to adapt to the management requirements of major power generation groups after the reform of the power system. This requires power plant auxiliary equipment manufacturing enterprises to seize opportunities, accelerate technological progress, and catch up with the final layout of energy strategies.

The intensification of power shortages has provided a vast market for enterprises producing power station auxiliary equipment. Many domestic manufacturers of power station auxiliary equipment are overloaded with tasks, and their production has exceeded historical highs. Some manufacturers have received orders that exceed their design and production capacity. The task of medium speed coal mills in Shanghai Heavy Machinery Factory has reached 250 units; Beijing Electric Power Equipment General Factory plans to produce 130 medium speed coal mills; Shanghai Electric Power Construction Plant needs to produce 190 sets of feedwater pumps to meet the planned requirements; Zhejiang Jiangfeida Electromechanical Group Co., Ltd. is expected to consume 120000 tons of steel for the production of electrostatic precipitators and desulfurization equipment; The task of producing air preheaters and fan rotors by Houghton Hua Company has greatly exceeded its actual production capacity.

China's national economy will continue to maintain a high growth rate in the coming period, and the power industry will also continue to develop rapidly. From this perspective, the market potential for power plant auxiliary equipment is enormous.