急求背压式汽轮机论文,

急求背压式汽轮机论文,
急求背压式汽轮机论文,

急求背压式汽轮机论文,
back-pressure steam turbine
Exhaust steam pressure (back pressure) is higher than atmospheric pressure of the steam turbine.Exhaust back pressure steam turbine used for heating as a heating-type steam turbine,the application is very wide; used for other turbine exhaust steam into the steam back pressure steam turbine known as the front-turbine.
Back pressure steam turbine exhaust pressure is high,low flow section of the series,simple structure,but without the huge condenser and cooling water systems,units of light is small,and low cost.When it's exhaust steam used for heating,the heat may be fully used,but this time the steam turbine power and steam required for the amount of heat is directly related to the same time,it is not possible to meet the heat load and electricity (or power) the need for load variations This is the back pressure steam turbine used for heating when the limitations.The back pressure steam turbine power generation is usually associated with extraction condensing steam turbine or steam turbine parallel operation or into the power grid,to adjust and balance with other steam turbine electric load.For the drive machinery such as pumps and fans back pressure steam turbine,then the other steam source to adjust and balance the heat load.Of back pressure steam turbine power generation with voltage regulator,according to the amount of back pressure steam into the change control to adjust the production process into steam in the heat load needs,and to exhaust steam pressure control in the specified range.
For the parameters of low-power station steam turbine,and sometimes in the old units can be set prior to a high-parameter Diego back pressure steam turbine (ie,front-steam turbine) in order to improve power plant thermal efficiency,increased power,but by that time needs to be replaced with a new boiler and pump and other equipment.