Technology
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Plasma Ignition and Combustion Stabilization (PICS) Technology for Pulverized Coal Fired Boilers
PICS was developed by LY Power with independent intellectual property right. By March 2020, LY Power has applied this technology on 862 units including 31 units overseas such as South Korea, Russia, Southeast Asia, Europe, Africa, etc. The total capacity is over 370GW.
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Mini Oil Ignition & Combustion Stabilization System
Mini-oil Ignition technology combines medium atomization and intensified gasification, applying the stable and high temperature (above 1800℃) oil torch with a small amount of fuel oil (20-250kg/h). When pulverized coal goes through the oil flame, it will soon absorb the heat and release volatile matters which immediately burst the coal particles and ignite. With staging combustion and unique air distribution, sufficient combustion can be realized at the beginning of ignition and the afterwards burning condition would be more stable.
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Fuel Oil Free Power Plant
Dependent on plasma ignition and combustion stabilization system, LY Power developed Fuel Oil-free Power Plant firstly in world. It means all those oil facilities including oil guns, oil pumps, oil pipes, oil tanks, etc will not be required at all for these pulverized coal fired power units. After the application of PICS Oil-free Technology, the power plant will eliminate fuel oil completely. In May of 2008, LY Power completed the first demonstration PICS fuel oil-free project. By March 2020, LY Power has applied PICS Oil-free Technology on around 130 oil-free power units of 60 power plants.
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Integrated Control Technology for High Temperature Corrosion on Boilers
High temperature corrosion problem has become a common problem in many large coal fired power plant boilers. It causes boiler water wall becoming thinner leading to pipe leaking and explosion accidents. According to the survey, the repair downtime of the domestic units of which the capacity are 300MW and above caused by pipe explosive accounts for about 40%. Therefore, high temperature corrosion not only affect the safe operation of the boiler, but also causes huge economic loss. The integrated high temperature corrosion control technology of LY Power can solve this problem effectively. The technology including three parts as follow.
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Dual-scale Low NOx Combustion Technology for T-firing Boilers
Dual-scale low NOx combustion technology advances in achieving differentiation of characteristics 3-field (temperature, air and concentration of pulverized coal, orbit of moving coal particle) in relevant zone in spatial scale through modification of combination of furnace combustion jet stream as well as achieving differentiation of characteristics 3-field in relevant nodal point zone during process scale (the 3-field characteristics on the two scales are different from other zones).
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AGC Coordination and Steam Temperature Optimization Control System
The predictive control technology based on online model identification is used to replace the traditional “feedforward + PID feedback” control mode to realize AGC control and coordinated control between the boiler and the turbine. At the same time, factors influencing steam temperature like unit load, flue gas volume, coal feed rate, secondary air volume, feed water temperature are considered and identified to form a disturbance model. With this model, lag and stability problems will be solved. Besides, tracking performance of the unit will be improved so that important parameters such as steam pressure and steam temperature will be better controlled.
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Low NOx Emission Technology for CFB Boilers
The technology is based on the concept of high efficiency and low ammonia combustion inside the furnace, supplemented by SNCR denitration outside the furnace, and advocates the combination of rational use of fuel and pollution control technology, combustion control technology and flue gas denitrification technology, so as to achieve high efficiency and low cost of NOx ultra-low emission through comprehensive prevention measures.
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Intelligent Sootblowing Optimization Control System for Boiler
Based on advanced technologies of soft sensor modeling, online monitoring and diagnosing, dynamic compensation , it can be realized for quantifying and visually monitoring the heating surface pollution degree and optimizing soot blowing. By optimizing the operation area and frequency of sootblowers, the overall heat absorption distribution ratio of heating surface tends to be reasonable. In our system , the sootblowing process will be for actual demand, not for fixed time and quantity like before. Accident caused by unreasonable sootblowing can be effectively avoided and the pipeline life can be prolonged. It also can be achieved for energy saving, consumption reduction and economic and safety improvement of unit operation.
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Non-metallic idler
The idler roller is an essential component used to support the weight of the conveyor belt and materials on a belt conveyor. Our company has independently developed and produced non-metallic idler rollers using chemical by-products such as polyvinyl chloride (PVC) and ultra-high molecular weight polyethylene (UHMWPE) as raw materials.
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Catalysts
SCR De-NOx catalysts from Longyuan Environmental Protection, special for the removal of nitrogen oxides in flue gas. As the core component of SCR De-NOx process, it has been applied to over 1300 units in China. It is the most mature and reliable De-NOx technology and can reduce NOx concentration from 1000mg/Nm3 to below 50mg/Nm3.