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我厂三台220吨/时高压锅炉,均为上海锅炉厂产品。其主要参数是;过热蒸汽压力100公斤/厘米~2;过热蒸汽温度540℃;炉膛出口烟气温度1278℃;炉膛容积热负荷256×10~3大卡/米~3·时。几台锅炉自投产以来,屏式过热器的夹马一直处在1100℃的高温烟气下工作。在采用优质耐热合金钢的情况下,平均运行周期也不到一个月就被烧坏,造成过热器管束自由摆动,管子参差不齐,受热不均,容易产生爆管事故,不仅使锅炉安全运行受到严重威胁,而且每年都要消耗大量进口优质耐热合金钢Cr20Ni14Si2。因此,我厂对屏式过热器的夹马结构
I plant three 220 tons / hour high pressure boiler, boiler plant in Shanghai are products. The main parameters are: superheated steam pressure 100 kg / cm ~ 2; superheated steam temperature 540 ℃; furnace outlet flue gas temperature 1278 ℃; furnace volume heat load of 256 × 10 ~ 3 kcal / m ~ 3 · hour. Since a few boilers have been put into operation, the screen-type superheater has been working under high-temperature flue gas at 1,100 ° C. In the case of high-quality heat-resistant alloy steel, the average operating cycle is also less than a month was burned, resulting in free superheater tube bundle swing, uneven pipes, uneven heating, prone to squib accidents, not only to make the boiler safe Running a serious threat, but also consume a large number of annual imports of high quality heat-resistant alloy steel Cr20Ni14Si2. Therefore, I plant on the screen superheater folder horse structure