1低氮燃烧器改造之更换木块分离器筛网、清理粗粉分离器保证分离器分离效果、磨煤机筛球提高煤粉细度

1. The modification of low nitrogen burner can replace the screen mesh of the wood block separator, clean the coarse powder separator to ensure the separation effect of the separator, and improve the fineness of coal powder by grinding machine sieve ball

针对磨煤机出粉偏粗的情况，进行了以下工作：利用机组停运及制粉系统检修机会逐台更换甲乙丙制粉系统木块分离器出口筛网，防止杂物进入粗粉分离器。清理甲乙丙粗粉分离器时，发现内部杂物较多，杂物主要有杂草、编织袋、树枝、铁丝等。粗粉分离器内部杂物较多原因是木块分离器出口筛网严重磨损，杂物随风进入分离器内部。

In view of the coal mill out of coarse powder, for the following work: using immobilized and pulverizing system maintenance opportunity by changing sieve armour ethylene-propylene block separator exports in the coal pulverizing system, to prevent debris into the coarse powder separator. When cleaning the thick powder separator of a, b and c, it was found that there were more internal sundries, such as weeds, woven bags, branches and iron wires. There are many sundries in the coarse powder separator, which is caused by the serious wear of the screen net at the outlet of the wood block separator.

将甲乙丙制粉系统粗粉分离器折向挡板角度统一调整至45°，固定折向挡板调整背帽，防止运行中挡板角度随意变化，保持粗粉分离器最佳分离效果。利用机组停运机会，联系检修甩球，发现碎钢球、不规则钢球较多，个别磨煤机衬瓦缺角、断裂。修复衬瓦后重新按1：1：1填充直径为30mm、40mm、50mm的钢球。经过上述处理和治理，煤粉细度恢复正常，

Will armour ethylene-propylene coarse powder separator to baffle Angle in the coal pulverizing system unified adjust to 45 °, fixed bends to the baffles are adjusted the cap, prevent in the operation of the baffle angles vary, keeping the best separation effect of the coarse powder separator. It is found that there are many broken steel balls and irregular steel balls in contact with the inspection and throwing ball when the unit is out of service. After repairing the liner, refill the steel ball with diameter of 30mm, 40mm and 50mm at 1:1:1. After the above treatment and treatment, the fineness of coal powder returned to normal.

制粉系统治理后，煤粉细度达到正常范围，炉渣含碳量有好转的趋势，但仍然偏高，说明煤粉细度偏高是炉渣含碳量偏高的原因之一，但不是主要原因。

After the coal pulverizing system of governance, pulverized coal fineness to the normal range, slag carbon content has a tendency to turn for the better, but it is still on the high side, shows that pulverized coal fineness on the high side is one of the reasons for the slag carbon content on the high side, but not the main reason.

2低氮燃烧器改造之切换制粉系统，改变制粉系统运行方式，观察制粉系统对炉渣含碳量的影响

2. The switching powder making system of the low nitrogen burner was reformed, the operation mode of the powder making system was changed, and the influence of the powder making system on the carbon content of slag was observed

在运行参数正常、煤粉细度情况下，炉渣含碳量仍然偏高，变换制粉系统运行方式，如甲乙丙、甲乙丁、甲丙丁、乙丙丁（制粉系统自下至上为甲乙丙丁），每种方式运行一天，观察各层低氮燃烧器对炉渣含碳量的影响，改变制粉系统运行方式后，炉渣含碳量没有明显的变化，可以排除制粉系统运行方式对炉渣含碳量的影响。

In running parameters under normal operation, the fineness of pulverized coal slag carbon content is still on the high side, transform the coal pulverizing system operation mode, such as armour ethylene-propylene, party a and party b, d, a BingDing, YiBingDing (pulverizing system from the bottom of a YiBingDing), running a day each way, observing the layers of low nitrogen burner for slag carbon content, the influence of change of the coal pulverizing system operation mode, slag carbon content had no obvious change, can eliminate the coal pulverizing system operation mode for the effects of slag content.

3低氮燃烧器改造之修复或更换低氮燃烧器

Repair or replace the low-nitrogen burner with a modified low-nitrogen burner

对低氮燃烧器修复、更换进行的具体工作如下：（1）重新进行切圆校核符合要求。（2）进行喷燃器执行机构调试，保证内外摆动角度一致、同步摆动灵活无卡涩；对燃尽风挡板也进行了检查调试，保证灵活无卡涩。（3）对所有低氮燃烧器进行修复或更换，所有低氮燃烧器做耐磨处理。

The specific work of repair and replacement of low nitrogen burner is as follows: (2) conduct the actuator debugging of the burner to ensure the internal and external swing angles are consistent and the synchronous swing is flexible without sticking; The exhaust air baffle is also checked and debugged to ensure flexibility and smooth. (3) repair or replace all low-nitrogen burners, and wear resistant all low-nitrogen burners.