电力专业英语第六讲讲解.pptx

电力系统专业英语;词汇;课文内容;; For district heat supply (of industrial plants), steam extracted from turbines (T,II, and IIT turbines) or from back-pressure (backpressure turbines P) is utilized. The production of electric and thermal energy is of hybrid nature. (of industrial plants)用于工业生产的 back-pressure背压式 is of hybrid nature混合的形式 按照汽轮机的热力特征分类 (1)、凝汽式汽轮机:蒸汽在汽轮机内膨胀做功以后,除小部分轴封漏气外,全部进入凝汽器凝结成水的汽轮机.实际上为了提高汽轮机的热效率,减少汽轮机排汽缸的直径尺寸,将做过功的蒸汽从汽轮机内抽出来,送入回热加热器,用以加热锅炉给水,这种不调整抽汽式汽轮机,也统称为凝汽式汽轮机. (2)、抽汽凝汽式汽轮机:蒸汽进入汽轮机内部做过功以后,从中间某一级抽出来一部分,用于工业生产或民用采暖,其余排入凝汽器凝结成水的汽轮机,称为一次抽汽式或单抽式汽轮机.从不同的级间抽出两种不同压力的蒸汽,分别供给不同的用户或生产过程的汽轮机称为双抽式(二次抽汽式)汽轮机. (3)、背压式汽轮机:蒸汽进入汽轮机内部做功以后,以高于大气压力排除汽轮机,用于工业生产或民用采暖的汽轮机. (4)、抽汽背压式汽轮机:为了满足不同用户和生产过程的需要,从背压式汽轮机内部抽出部分压力较高的蒸汽用于工业生产,其余蒸汽继续做功后以较低的压力排除,供工业生产和居民采暖的汽轮机. (5)、中间再热式汽轮机:对于高参数、大功率的汽轮机,主蒸汽的除温、初压都比较高,蒸汽在汽轮机内部膨胀到末几级,其湿度不断增大,对汽轮机的安全运行很不利,为了减少排气湿度,将做过部分功的蒸汽从高压缸中排出,在返回锅炉重新加热,使温度接近初始状态,然后进入汽轮机的的低压缸继续做功,这种汽轮机称为中间再热式汽轮机.;;The main parts of a thermoelectric plant are fuel handling and transportation facilities, boiler unit (department), engine department, chemical water treatment department, industrial water supply system, slag-and-ash removal system, electrical engineering equipment (generators, main distributing unit and distributing unit for local requirements), auxiliary departments (maintenance repair shop, heat-control department, motor transport repair shop. etc.). fuel handling and transportation facilities燃料处理和传输设备 boiler unit锅炉部分 engine department引擎部分（汽轮机） chemical water treatment department水化学处理部分 slag-and-ash removal system灰渣移除系统 ;;;;;;;The heat liberated during the condensation of waste steam is transferred to cooling water which circulates in the circuit consisting of the condenser 21, cooler 23, and circulation pump 24. In addition to the condensate from the turbine condenser, the condensate from steam users and feed water after chemical treatment 14 enter the feed tank through the deaerator. The heat liberated释然出的热 cooling water冷却水 circulates in the circuit consisting