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发明公开
CN110500610A 一种可实现火电机组从并网投脱硝的方法 无效 - 驳回

一种可实现火电机组从并网投脱硝的方法
摘要：
一种可实现火电机组从并网投脱硝的方法，优化启动配煤，控制最低喷氨温度在285℃不超过2小时；提高锅炉水侧温度到90～150℃以增加脱硝入口烟温5～10℃，提高锅炉烟气侧温度以增加脱硝入口烟温5～10℃，提高锅炉蒸汽侧温度至450～500℃以提高脱硝入口烟气温度5～8℃，控制烟气中的氧量低于12％，最终实现火电机组从并网开始投脱硝。本发明借助优化调整火电机组的运行方式，改变水、汽、烟气的换热参数、控制烟气中的氧量，提高脱硝入口的烟气温度(提温幅度15～28℃)，在零改造成本、保证机组安全和脱硝催化剂使用寿命的前提下，实现机组启动过程中从并网开始的NOx超低排放，满足机组的深度调峰。
摘要（英）：

The invention discloses a method capable of achieving denitration commissioning from grid connection for a thermal power generating unit. Coal blending is optimally started, and the minimum ammonia spraying temperature is controlled to be at the temperature of 285 DEG C at most 2 hours; the temperature of the water side of a boiler is improved to 90 DEG C to 150 DEG C so that the temperature of the smoke at a denitration inlet is increased by 5 DEG C to 10 DEG C, the temperature of the gas side of the boiler is increased so that the temperature of the smoke of the denitration inlet is increased by 5 DEG C to 10 DEG C, the temperature of the steam side of the boiler is increased to 450 DEG C to 500 DEG C so that the temperature of the smoke at the denitration inlet can be increased by 5 DEGC to 8 DEG C, the oxygen content in the smoke is controlled to be lower than 12%, and finally denitration commissioning of the thermal power generating unit is started from grid connection. By meansof optimal adjustment on the running manner of the thermal power generating unit, heat exchange parameters of water, steam and smoke are changed, the oxygen content in the smoke is controlled, the temperature of the smoke at the denitration inlet is increased (the temperature increasing amplitude is 15 DEG C to 28 DEG C), and under the premise that the transformation cost is zero, the unit safetyis ensured that the service life of a denitration catalyst is ensured, NOx ultralow emission started from grid connection in the unit starting process is achieved, and deep peak shaving of the unit isachieved.

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