Method for better utilizing waste gas of turboset

Abstract

The invention discloses a method for better utilizing the waste steam of a turboset. Machine connection of a power plant coexisting back pressure steam turbine and a condensing steam turbine is achieved through a machine connecting device. According to the operation manner after machine connection, when the demand for the heat supply quantity of a heating network is high and the back pressure steam turbine supplies heat normally, the machine connecting device is closed, steam in the back pressure steam turbine is discharged into a heating network steam inlet pipeline through a back pressure steam discharging pipeline, and the steam in the condensing steam turbine is discharged into the heating network steam inlet pipeline through a condensing steam extraction pipeline; when the demand for the heat supply quantity of the heating network is low and the heat supply loads of the back pressure steam turbine are low, the machine connecting device is opened, part of the steam discharged by the back pressure steam turbine through the back pressure steam discharging pipeline enters a heating network heater through the heating network steam inlet pipeline, and the other part of the steam enters the condensing steam turbine to do work to generate electricity through the condensing steam extraction pipeline and the machine connecting device; when the condensing steam turbine breaks down or rejects loads and the heat supply loads of the back pressure steam turbine are increased, the machine connecting device is adjusted and closed. According to the method for better utilizing the waste steam of the turboset, the remaining steam of the turboset is effectively and reasonably used, and profits are stable.

Description

technical field [0001] The invention relates to an operation method of a steam turbine unit, in particular to a method for improving the utilization of residual steam of the steam turbine unit. Background technique [0002] Back-pressure steam turbine refers to a steam turbine whose exhaust steam pressure is greater than atmospheric pressure. Its exhaust steam can be used to heat the circulating water in the heating network to meet the heat supply during the heating period. Its exhaust steam has been used reasonably and effectively, with high cycle efficiency , The waste heat loss is basically zero. Since the power generation of the back pressure steam turbine is determined by the heat load, that is, when the heat load is large, the power generation will be high, and vice versa, it is suitable for applications where the heat load is relatively stable. However, heating is seasonal. In the initial and final stages of heating, due to the small heating demand of the heating net...

AI Technical Summary

Problems solved by technology

However, based on the fact that the back-pressure steam turbine and the condensing steam turbine are independent power generation equipment, their operation modes are also independent of each other. Under the influence of seasonal load, this independence leads to an inverse ratio between energy consumption and power generation efficiency of the power plant. The income is not stable enough, seriously affecting the efficiency of the power plant

Images