Integrated Energy Efficiency System for Heating Low Pressure Cylinder Optical Axis Cooling and Small Machine Exhaust Steam Waste Heat Recovery

Abstract

The invention provides a comprehensive energy efficiency system for heating low-pressure cylinder polished shaft cooling and small turbine steam exhaust waste heat recovery. The system mainly comprises an auxiliary engine small turbine, a turbine high-pressure cylinder, a turbine medium-pressure cylinder, a turbine low-pressure cylinder, a condenser, a 6# low-temperature heater, a hot press, valves and pipes, wherein the valves and the pipes are used for connecting relevant devices. The hot press can match medium-pressure cylinder exhaust steam with small turbine steam exhaust to form target-parameter steam with pressure between the pressure of medium-pressure cylinder exhaust steam and the pressure of small turbine steam exhaust. According to the turbine low-pressure cylinder manufactured by heat supply reformation of a back pressure turbine, a low-pressure rotor is replaced by a polished shaft. According to the system, the small amount of medium-pressure cylinder exhaust steam which originally needs to enter the low-pressure cylinder to cool the polished shaft is matched with small turbine steam exhaust extracted by the hot press to form the target steam, part of the target steam can cool the low-pressure rotor, and other target steam enters a turbine regenerative system to heat condensate water. By means of the system, low-pressure cylinder cooling steam which is wasted originally serves as a driving steam source which is matched with the small turbine steam exhaust extracted by the hot press to form the utilizable steam, so that the purposes of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to a comprehensive energy efficiency system for recovering exhausted steam and waste heat, in particular to a comprehensive energy efficiency system for cooling the optical axis of a heating low-pressure cylinder and recovering exhausted steam and residual heat for a small machine Background technique [0002] For the heating units with a large heating market and the units cannot meet the heating capacity through steam extraction, in order to expand the heating market and increase the heat supply, the back pressure pure condensing switching transformation can be carried out, and the units operating in the back pressure mode, Because the low-pressure rotor is replaced by the optical shaft, in order to prevent the temperature in the cylinder from rising due to the blowing of the optical shaft and cause deformation of the cylinder, the low-pressure cylinder needs to enter a small amount of steam to cool the optical shaft. When this p...

AI Technical Summary

Problems solved by technology

When this part of steam enters the low-pressure cylinder, it cannot do work and can only play a cooling role, and the useful energy of the steam will be greatly lost.

[0004] 1. The optical axis of the low-pressure cylinder of the back pressure machine is running, and part of the middle exhaust steam needs to enter the low-pressure cylinder to cool the optical axis

[0005] 2. The steam entering the low-pressure cylinder is the exhaust steam of the medium-pressure cylinder, which belongs to high-grade energy, and there is energy waste

[0006] 3. The exhaust steam of the steam-driven auxiliary equipment of the back pressure machine unit is not utilized, and this part of heat energy is wasted in vain

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