300MW汽轮机中低压缸连通管的改造与节能分析

Reconstruction and Analysis of Low Pressure Cylinder Communicating Pipe of 300 MW Steam Turbine

对"单双单"双截止阀型汽轮机中低压缸连通管及阀门的节流消除进行了改造,将单双单双截止阀型中低压缸连通管改造为"倒U单管"单蝶阀型新式中低压缸连通管,并从流体力学和热力学的角度对改造系统进行分析.结果表明,改造后节流损失明显消除,机组TRL工况下发电煤耗降低了0.641 7 g/k Wh,发电能力提高了0.614 4 MW,该方案普遍适合上海汽轮机厂300 MW旧型机组的推广,具有广泛的经济效益与社会效益.

Based on the reconstruction of ＂single double single＂ double valve type low pressure cylinder valve in steam turbine into ＂Inverted U single＂ single butterfly valve type in low-pressure cylinder, the transformation systematic analysis of fluid mechanics and thermodynamics is analyzed. The result proves that the throttle loss significantly is eliminated. Under TRL condition, the coal consumption of power generation unit decreases by 0.641 7 g/kWh, and the power generation capacity improves by 0.614 4 MW. This scheme is suitable for the old 300 MW unit of Shanghai Steam Purbine Plant widely, and will realize big economic and social benefits.