Hebei absorption tower glass flake anti-corrosion maintenance

Anti corrosion maintenance of glass flakes in absorption tower

There are generally three types of vinyl glass flake adhesive: brick chimney, reinforced concrete chimney, and steel chimney. Its materials are generally divided into several types: iron, asbestos, and pottery, which are generally used in small places such as homes and offices. In addition, there are also those built with bricks, mostly cylindrical in shape, thin at the top and thick at the bottom. They are generally used in large industrial plants such as boilers and smelters. The construction method of chimney desulfurization is used on carbon steel substrate: ① First, remove oil and dirt from the surface, and then carry out rust removal. The rust removal grade should meet the Sa2.0 or St3 standards at least. After cleaning the rust surface, apply VEGF resin as a base and wait for it to dry before construction. ② Use a manual trowel to scrape and trowel a 1-2mm (per layer) thick layer of VEGF adhesive, which will harden after a few hours, and then construct according to the design requirements to the specified thickness. Generally, testing is carried out every 1mm thickness to confirm whether there are pinholes and other defects in the coating. ③ Increase the thickness appropriately at corners or sudden changes in shape, or use it in combination with FRP. ④ Cover one to two layers with VEGF resin. ⑤ Quality control of VEGF scale adhesive coating. The quality of VEGF scale adhesive coating directly affects its corrosion resistance and service life, so strict control should be exercised over the quality of VEGF scale adhesive coating. In general, the final inspection items for coatings mainly include appearance defects, hardness, pinhole testing, thickness testing, hammering inspection, etc.Anti corrosion maintenance of glass flakes in absorption towerTable 2.3.5.2 Dosage of Glue Type Specification Dosage (KG/M2) Bottom coat (per coat) Glue layer (1mm thick) Surface coat (per coat) Metal surface VEGF-1-M0.20～0.251.4～1.60.25 　　VEGF-2-M0.15～0.201.3～1.50.20 　　4) The application of corrosion-resistant scale adhesive lining engineering is due to the advantages of VEGF scale adhesive, such as good impermeability, low construction difficulty, easy repair of physical failures, and moderate cost. Therefore, VEGF scale adhesive is widely used in industries such as power, metallurgy, and chemical engineering, especially in flue gas desulfurization (FGD) system devices in power systems, such as absorption towers, oxidation towers, and feed pipes, as shown in the table below. Table 2.3.5.3 Application of VEGF scale adhesive in wet gas flue gas desulfurization Equipment name Corrosion conditions Anti corrosion treatment specifications Feed pipe SO2 gas, etc. VEGF lining at 150 ℃ or below, FRP SO2 gas, high-temperature coating cooling tower SO2 gas, ≤ 150 ℃ VEGF lining rapid cooling tower SO2 gas, 150-200 ℃ VEGF refractory brick SO2 gas, 200-300 ℃ VEGF refractory brick SO2 gas, 500-700 ℃ VEGF refractory brick circulation tank H2SO3, H2SO4 mist, 60-90 ℃ VEGF lining, FRP intermediate delivery pipe SO2 gas, H2SO4 mist, 60-80 ℃ VEGF lining, FRP absorption tower pH=3-12, 60-80 ℃ VEGF lining, rubber lining pH=3-12150 ℃ VEGF lining pH=3-1225 ℃ VEGF lining refractory brick circulation tower pH=4-14, 60-80 ℃ VEGF lining Lining, rubber lining, FRP discharge pipe SO2, H2SO4 mist, 60-70 ℃ VEGF lining, FRP acid mistAnti corrosion maintenance of glass flakes in absorption towerSeparators SO2, H2SO4 mist, 60-70 ℃ VEGF lining, FRP concentrator pH=3-12, 60-70 ℃ VEGF lining, rubber lining, FRP oxidation tower pH=3-12, 60-80 ℃ VEGF lining, VEGF-FRP pipeline rubber lining, FRP delivery pipe ≤ 100 ℃ VEGF lining, FRP 100-150 ℃ VEGF lining, FRP chemical storage tank room temperature -60 ℃ VEGF lining, rubber lining, FRP
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