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为了解决热水管网系统阻力平衡问题,我们在几个较大的热网工程(如某工程耗热量Q=900万千卡/时,作用半径为1.5～2.0公里,供热参数为:130/70℃)中,采用减小车间入口截止阀直径(在阀门全开的条件下),来代替调压板进行调压并兼作关闭阀门,通过几年运行实践效果良好。这些热网工程都是一次投入运行,基本上达到设计要求的参数。一、调压截止阀的计算 d=5.16ξ~(1/4)·(G~2/H)~(1/4)(毫米)(1)式中 d——调压截止阀内径(毫米); G——用户入口流量(米~3/小时);
In order to solve the problem of the resistance balance of the hot water pipe network system, we have several large heat network projects (such as a project heat consumption Q = 9 million kcal/hour, the role radius is 1.5 ~ 2.0 km, and the heating parameter is: 130 In /70°C), the reduction of the diameter of the inlet valve of the workshop (under the fully open condition of the valve) is used instead of the pressure regulator to regulate the pressure and also to close the valve. The practice effect is good through several years of operation. These thermal network projects are all put into operation and basically meet the design requirements. First, the pressure regulator valve calculation d = 5.16 ξ ~ (1/4) · (G ~ 2 / H) ~ (1/4) (mm) (1) type d - regulator valve diameter (mm ); G - user entrance flow (meter ~ 3 / hour);