The air-cooling system of a coal-fired power station driven by combined heat and cold storage driven by waste heat has the following characteristics: connecting the boiler to the steam turbine, connecting the steam turbine to the air-cooled condenser, connecting the air-cooled condenser to the low-pressure heater, connecting the low-pressure heater to the deaerator, connecting the deaerator to the high-pressure heater, and saving the high-pressure heater to the boiler. Coal burner is connected; boiler is connected with waste heat exchanger of flue gas, heat exchanger of flue gas is connected with air preheater; deaerator is connected with waste heat exchanger of exhaust steam of deaerator, boiler is connected with expanding container of sewage discharge and waste heat exchanger of sewage, waste heat exchanger of flue gas is connected with waste heat exchanger of exhaust steam of deaerator, waste heat exchange of exhaust steam of deaerator is connected with waste heat exchanger of exhaust steam of deaerator, waste heat exchange of exhaust The exchanger is connected with the waste water heat exchanger, the waste water heat exchanger is connected with the heat storage device and the flue gas waste heat exchanger; the heat storage device is connected with the generator, the heat storage device and the condenser, the condenser is connected with the evaporator and the absorber respectively, and the generator is connected with the absorber and the generator respectively; the evaporator is connected with the air condenser. Connect.
【技术实现步骤摘要】
一种余热组合驱动的冷热储联供燃煤电站空冷系统及其运行调控方法
本专利技术涉及燃煤电站余热组合利用的空冷
,是一种余热组合驱动的冷热储联供燃煤电站空冷系统及其运行调控方法。
技术介绍
汽轮机的排汽采用空气冷却的燃煤机组称为空冷机组,按照直接或间接空气冷却的方式又分为直冷机组和间冷机组,其冷却系统称为直冷系统和间冷系统,其中,我国主要以直冷机组为主。直冷机组以其良好的节水性能,在我国富煤缺水的东北、华北和西北(“三北”)地区的燃煤电站获得了广泛应用,尽管其耗水率只有湿冷机组的15%~25%,但却以煤耗率比湿冷机组高出10~20g/kWh为代价。其原因之一在于空冷凝汽器气侧换热系数低,其换热面积是水冷凝汽器的几十倍,致使设计初始温差高达38℃~40℃,如此在高温时段通常直冷机组的运行背压高达30kPa以上,甚至达50kPa而逼近其低真空保护动作背压。从设计和运行考虑防冻,根据我国北方地区冬季寒冷的特点,因而无论何种空冷系统具有很高的冰冻危险,因此冬季防冻技术也不可忽略。另外,除氧器排气是指把除氧过程中,从水中逸出的气体排入大气。实际上排入大气的是气、汽混合物,因为 ...
【技术保护点】
1.一种余热组合驱动的冷热储联供燃煤电站空冷系统,其特征在于:它包括锅炉(1)的过热蒸汽与汽轮机(2)的进汽入口连通,汽轮机(2)与发电机(3)连接,汽轮机(2)的排汽口(31)与空冷凝汽器(4)第一输入端连通,空冷凝汽器(4)输出端通过凝结水泵(5)与低压加热器(6)输入端连通,低压加热器(6)输出与除氧器(7)输入端连通,除氧器(7)第一输出端与高压加热器(8)输入端连通,高压加热器(8)输出端与锅炉(1)的省煤器连通;锅炉(1)的烟气出口(9)与烟气余热交换器(16)高温侧输入端连通,烟气热量交换器(16)高温侧输出端(10)与空气预热器连通;除氧器(7)的排汽口(1 ...
【技术特征摘要】
1.一种余热组合驱动的冷热储联供燃煤电站空冷系统,其特征在于:它包括锅炉(1)的过热蒸汽与汽轮机(2)的进汽入口连通,汽轮机(2)与发电机(3)连接,汽轮机(2)的排汽口(31)与空冷凝汽器(4)第一输入端连通,空冷凝汽器(4)输出端通过凝结水泵(5)与低压加热器(6)输入端连通,低压加热器(6)输出与除氧器(7)输入端连通,除氧器(7)第一输出端与高压加热器(8)输入端连通,高压加热器(8)输出端与锅炉(1)的省煤器连通;锅炉(1)的烟气出口(9)与烟气余热交换器(16)高温侧输入端连通,烟气热量交换器(16)高温侧输出端(10)与空气预热器连通;除氧器(7)的排汽口(14)与除氧器排汽余热交换器(17)高温侧输入端连通,除氧器排汽余热交换器(17)的排气口(15)与大气相通;锅炉(1)的排污水口(11)与排污扩容器(12)输入端连通,排污扩容器(12)输出端与污水余热交换器(18)高温侧输入端连通,污水余热交换器(18)高温侧输出端与排水沟(13)连通;烟气余热交换器(16)低温侧输出端与除氧器排汽余热交换器(17)低温侧输入端连通,除氧器排汽余热交换器(17)低温侧输出端与污水余热交换器(18)低温侧输入端连通,污水余热交换器(18)低温侧输出端与储热装置(19)高温侧输入端连通,储热装置(19)高温侧输出端与第一工质循环泵(20)输入端连通,第一工质循环泵(20)输出端与烟气余热交换器(16)低温侧输入端连通;蓄热器(19)低温侧输出端与第二工质循环泵(21)输入端连通,第二工质循环泵(21)输出端与发生器(22)高温侧输入端连通,发生器(22)高温侧输出端与蓄热器(19)低温侧输入端连通;发生器(22)低温侧第一输出端与冷凝器(23)输入端连通,冷凝器(23)输出端通过第一节流阀(24)与蒸发器(25)输入端连通,蒸发器(25)输出端...
【专利技术属性】
技术研发人员:赵波,郑康乐,高阳,任汝飞,曹生现,王恭,吕昌旗,
申请(专利权)人:东北电力大学,
类型:发明
国别省市:吉林,22
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