Energy-saving steam turbine generator set utilizing low-pressure saturated steam to generate electricity

Abstract

The invention provides an energy-saving steam turbine generator set utilizing low-pressure saturated steam to generate electricity. The energy-saving steam turbine generator set comprises a skid-mounted base, the skid-mounted base is provided with a generator through a shockproof supporting seat, the right side of the generator is connected into a reduction gear box through a coupler and is connected with a low-speed shaft, a guide blade, a rotor blade disc and blades are arranged in a first-stage turbine module, a steam inlet cover shell is arranged above the reduction gear box, a steam exhaust cover shell is connected and fixed to the left side of the steam inlet cover shell, the internal structure of a second-stage turbine module is the same as the internal structure of the first-stageturbine module, the second-stage turbine module is arranged in front of the first high-speed shaft, and is connected into and communicate into a third-stage turbine module through a flow guide pipe, and an oil return pipe is connected into an oil filter. According to the energy-saving steam turbine generator set, all the turbine modules are independent, the process effect after the blades are damaged is avoided, moreover, a high-speed turbine design is adopted, then the expansion ratio is high, the steam discharge pressure can achieve negative pressure, the enthalpy drop can be fully utilized,the power generation power is large, and the efficiency is relatively high.

Description

technical field [0001] The invention relates to the technical field of low-grade waste heat recovery and power generation in industrial enterprises, in particular to an energy-saving steam turbine generator set using low-pressure saturated steam to generate power. Background technique [0002] At present, there are two ways to utilize low-pressure saturated steam. One is to use the low-pressure saturated steam turbine as the prime mover to directly drive the compressors, fans, water pumps, etc. of industrial enterprises, but the power of the driving equipment must match the output power of the prime mover. , has not realized the complete recovery of low-grade heat energy, and cannot be regarded as a way to completely solve this problem; the other is the waste heat power generation method that converts low-grade heat energy of low-pressure saturated steam into high-grade electric energy, which can maximize the recovery of steam heat energy , converted into electrical energy ...

AI Technical Summary

Problems solved by technology

Due to the limitations of its internal structure, when the outlet pressure decreases and the expansion ratio increases, especially when the exhaust pressure is required to be vacuum, the screw machine cannot achieve

Therefore, the exhaust pressure is relatively high, and negative pressure cannot be achieved, so the enthalpy drop of steam cannot be fully utilized, energy cannot be recycled to the maximum extent, and the efficiency is low.

Although the steam turbine power generation technology has high efficiency and the exhaust steam can also achieve negative pressure, it usually requires the steam inlet parameter to be superheated steam. When the low-pressure steam is in a saturated state, the steam turbine expands to do work, the pressure decreases, and the water vapor liquefies to produce water droplets. Rotating blades prone to water erosion

When the steam turbine is designed to be multi-stage, the damage of the first-stage blades will also have a joint reaction, resulting in water erosion and damage to the multi-stage blades

Therefore, the current existing technology has problems such as low efficiency or high requirements for steam quality. To solve this problem, it is necessary to design a new type of energy-saving steam turbine, which is specially designed for the recovery and utilization of low-pressure saturated steam, and can be fully utilized. Enthalpy drop of steam to improve power generation efficiency

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