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我厂安装的罗马尼亚出品的CM-25-40型(依泼罗姆型)豎井式煤粉锅炉,工作压力为37大气压,每炉有三只水面计。自从锅炉投入运行以后,水面计玻璃板每隔2～4天就破裂一块,运行半年,消耗了许多玻璃板。经过我们采用井内河砂进行热处理之后,大大提高了玻璃板的使用寿命,现在,每块的平均使用寿命是35～45天。热处理是在一只简单的金属箱内进行的。将金属箱放在普遍的电炉上。然后将河砂用清水洗净烘干放入箱内,铺平,再将擦干净的玻璃板平放在内,上面再铺上一层干河砂,使其埋在砂内。加热时,用调压器控制电炉温升,每小时温升100℃,当水银温度计指示数值达到300℃(此值按锅炉饱和蒸汽温度而定)
Our factory installed Romanian CM-25-40 (Etröhm-type) vertical shaft pulverized coal boilers, working pressure of 37 atmospheres, each furnace has three surface meter. Since the boiler was put into operation, the glass surface water meter ruptured every 2 to 4 days, running for six months, consumed a lot of glass. After we use well sand river for heat treatment, greatly improving the service life of the glass, and now, the average life of each block is 35 to 45 days. Heat treatment is carried out in a simple metal box. Put the metal box on a common electric stove. Then the river sand washed with water and dried into the box, paved, and then wipe the glass clean flat, and then covered with a layer of dry river sand, so buried in the sand. Heating, the temperature control furnace with a voltage regulator, the temperature rise of 100 ℃ per hour, when the mercury thermometer indicates the value reached 300 ℃ (this value depends on the boiler saturated steam temperature)