Power plant desulfurization pump repair and protection technology desulfurization slurry circulation pump desulfurization system is the relay heat exchanger, booster fan after the large equipment, usually centrifugal, it directly from the bottom of the tower to extract the slurry circulation, desulfurization process is the largest flow, the use of The most demanding pump, corrosion and abrasion often lead to failure. The main features are: 1, strong abrasiveness: the bottom of the desulfurization tower slurry contains a large number of solid particles, mainly fly ash, desulfurization medium particles, the particle size is generally 0 ~ 400μm, 90% of 20 ~ 60μm, a concentration of 5% ~ 28% (mass ratio), these solid particles (especially Al2O3, SiO2 particles) have a strong abrasive. 2, strong corrosive: In the typical limestone (lime) - gypsum desulfurization process, the general tower bottom slurry pH value of 5 to 6, after adding desulfurizer pH up to 6 to 8.5 (circulating pump slurry pH And desulfurization tower operating conditions and the point of addition of desulfurization agent); Cl- can be enriched more than 80000mg / L, at low pH conditions, will have a strong corrosive. 3, cavitation: In the desulfurization system, circulating pump slurry delivery often contains a certain amount of gas. In fact, the slurry delivered by the centrifugal circulating pump is a gas-liquid-solid multiphase flow. The effect of the solid phase on the performance of the pump is continuous and uniform. The influence of the gas phase on the pump is much more complicated and more unpredictable than the solid phase. Application Case Analysis 1. Equipment Name of Equipment: Centrifugal desulfurization desulfurization method: carbide slag desulfurization Model: 450ZJA-1-A125; Flow rate: 2500m3 / h; Head: 14M; Rotational speed: 730r / min; 250KW; medium: carbide desulfurization products; PH value: 5-7; temperature: 55-70 degrees Celsius Pump casing material: two-way stainless steel 2, the solution: Are extremely strong, so for the metal material and repair materials demanding. Monica Ka Wah company after continuous exploration and practice, and after the practical application of the power plant, get a better effect. MEGA Wah Material and Technology is specially designed and manufactured for the maintenance and repair of industrial equipment. Its application covers all aspects of equipment maintenance and repair. We advocate rapid and effective repair, especially for transmission wear, Anti-corrosion, anti-wear, anti-cavitation protection, equipment failure detection and prevention and so on. Problem-solving process Picture: 3, Evaluation of technology application: The reasonable application of Mika's technical material has the decisive value embodied in the enterprise's modern production process. In helping enterprises to improve equipment management tools at the same time, companies can quickly and effectively repair the scene at the first time or under various conditions to deal with equipment problems, to the maximum extent possible to ensure that the production line downtime, cut-off caused by the loss of economic benefits Effectively avoid accidents caused by fire or electric power on site and ensure personal safety and business losses. Through the on-site repair and protection of the desulfurization pump casing, get the high recognition of the enterprise's high level, and as a result, the enterprise has established comprehensive cooperative relations with Mijavar and helped improve and improve its equipment management in more branch offices.
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