我厂有2台20t／h锅炉（互为备用），每年耗煤量5000多吨，按1997年煤价计算，仅耗煤费用就达13o多万元。由于管网支干线较多，从开始运行就分片供汽，一天H小时需供4遍汽，采暖效果一直不好，由于使用多年，跑、冒。滴、漏现象严重，致使终端供汽压力不足，必须进行大修。一、? I have 2 sets of 20t / h boiler (spare each other), the annual consumption of more than 5000 tons of coal, according to the calculation of coal prices in 1997, only coal consumption reached 13o million. As the pipe network branch more lines from the beginning for the operation of steam, H-day need for 4 times steam, heating effect has been poor, due to the use of years, run, run. Dripping, leakage serious, resulting in lack of pressure on the terminal for the steam, must be overhauled. one,?