The use of nano silicon crystal adhesive has improved the anti-corrosion, wear and oxidation life of boilers; 2. Enhanced the operational capability of the boiler; 3. Due to the decrease in furnace temperature and the lower surface energy of nano silicon gel, large-scale corrosion of boiler water-cooled walls is prevented; 4. Avoiding the occurrence rate of boiler pipe deformation and rupture caused by the alternating cold and hot conditions during the operation of hydraulic soot blowing, and improving the safety and reliability of boiler operation; 5. Increased the adaptability of the boiler to the medium, improved the economic efficiency of boiler operation, and reduced the production cost of boiler operation. 6. Effectively reduce the generation of thermal NOx (about 5%). 7. The increase in heat absorption of the boiler after coating can improve boiler efficiency by more than 1%. 8. The decrease in flue gas temperature of the boiler causes the boiler induced draft fan, etc
Sandblasting provides active surface capabilities to coatings, such as lattice defects and plastic deformation, generating certain stress states to increase the adhesion between coating particles and substrate surfaces, and improving the micro metallurgical bonding ability between coating particles and substrate. The activation effect analysis is as follows: ① Sandblasting creates a certain residual compressive stress on the surface of the workpiece after repeated impacts by sand particles. Although the stress value is extremely small, it is beneficial for relaxing the thermal stress of the coating during the coating process, improving the bonding strength of the coating, and also increasing the fatigue strength of the workpiece. ② Coatings can remove organic pollutants and oxide layers from the surface of workpieces, and can increase the plastic deformation of metal surface grains and cause lattice defects, making the substrate surface in a state where chemical reactions are prone to occur, which helps to physically bond the coating particles with the substrate surface
The main factors affecting boiler corrosion include ① medium characteristics ② furnace temperature ③ air flow ratio ④ aerodynamic field characteristics. To prevent furnace corrosion, we mainly improve aerodynamic conditions and enhance the anti-corrosion properties of water-cooled wall surfaces during operation; Preventing corrosion in the upper part of the furnace mainly relies on reducing the flue gas temperature or improving the anti-corrosion properties of the water-cooled wall surface. 1. After using nano silicon crystal adhesive material on the water-cooled wall of the furnace, the heat absorption capacity of the furnace water-cooled wall will be appropriately increased. Analysis shows that the heat absorption capacity of the metal tube wall after using nano silicon crystal adhesive material is 7.89% higher than that of the metal tube wall without nano silicon crystal adhesive material. Therefore, the use of nano silicon crystal adhesive material on the water-cooled wall enhances the anti-corrosion margin of the furnace. 2. Using nano silicon crystal adhesive material on the water-cooled wall of the furnace, due to its smooth surface characteristics
When it was first put into operation, there was very little corrosion, but over the years, it was found that the corrosion was quite severe, especially in recent years, with several consecutive pipe bursts occurring within a year. This is mainly reflected in the flame breaking zone at the upper part of the furnace, which is about 70 square meters. If not dealt with in a timely manner, there is a possibility of replacing a large number of furnace tubes in a short period of time. Therefore, it is recommended that Hainan Yisheng Petrochemical Co., Ltd. take effective anti-corrosion measures as soon as possible to eliminate unnecessary losses. Otherwise, this not only increases the maintenance intensity but also incurs significant costs. Therefore, it is recommended to adopt the nano silicon crystal adhesive anti-corrosion technology invented by Lianyungang Shengyuan Technology. This technology has been used in boilers of all sizes across the country, achieving good economic benefits.
Surface pretreatment: 1.1 Firstly, inspect the pipes at the construction site and find defects such as pits, wear, and hard damage on the surface of the pipes. After the bidding party treats the pipe defects, the steel pipe surface is sandblasted to remove surface coke, slag, hard ash, rust layer, and oxide layer until a metallic luster is exposed. The sandblasting pressure is 0.6-0.8MPa. 1.2 The sandblasting range should be larger than the coating area of the pipe construction to ensure sufficient coverage for the next step of construction.
From the current pictures and combined with the feedback from the manufacturer's technical personnel, the corrosion of boiler water-cooled walls is a common phenomenon that has existed for many years. There are many reasons for this, mainly due to the oxidation of the combustion medium with the metal surface at high temperatures, which causes some mobile ions to "crack" and lead to corrosion. The reason why it occurs at the bend angle is that the furnace flue gas burns from bottom to top, with high density, strong flushing force, long residence time, and even the formation of a certain vortex shape at the bend angle.
The energy-saving technology of boiler Bayer coating is widely used in the construction of various industrial furnace walls such as coal-fired boilers, circulating fluidized bed boilers, chain furnaces, and three gas furnaces, including ash cleaning, pit filling, coating, anti-wear, radiation, and drying. It is more obvious that it can quickly increase the temperature inside the furnace to achieve energy saving and high efficiency. Whether the technical quality meets the technical standard requirements largely depends on the technical performance of the Bayer coating products themselves. Bayer coating energy-saving products are a new generation of high-efficiency energy-saving products developed and produced by our company with independent intellectual property rights. This product has been developed with various additives and is a solvent-free two-component chemical reaction adhesive. In the development and production, adding an efficient accelerator greatly improves the bonding strength, accelerates the curing speed, promotes the thickening of the adhesive, and can be applied to vertical working surfaces without flowing or flowing
