Turbine Installation Manufacturer: Turbine Thermal System

　　The steam supplied by the turbine boiler is used to maintain the turbine’s speed (when not connected to the grid) or its load (when connected to the grid). After performing its function, the exhaust steam is condensed into water, which, after being extracted and heated, is returned to the boiler. Turbine installation manufacturer Our editor will now take you through the thermodynamic system of a steam turbine.

　　The thermal system of the steam turbine generator set is designed based on the basic parameters of the waste-to-energy plant provided by the customer. This thermal system shall meet the following requirements:

　　(1) The steam turbine has three-stage extraction steam. The primary air preheater uses the extracted steam to preheat the waste incinerator and the steam from the primary air and flue gas purification systems. The second stage supplies steam to the deaerator, whose operating parameters are set as follows: pressure approximately 0.27 MPa and temperature approximately 130°C. The third stage supplies steam to the low-pressure heater; there is no high-pressure heater.

　　(2) Under normal operating conditions, the steam generated by the four waste-to-energy boilers first ensures that the 20 MW turbine unit can perform work. The main condensate water is pumped from the condensate pump through a steam-seal cooler and a low-pressure heater before entering the deaerator. After being heated and degassed, it is then sent to the waste-to-energy boiler via the feedwater pump. One extraction steam stage is used for the boiler’s air preheater and flue gas purification system.

　　(3) When the turbine installation manufacturer performs maintenance on the waste heat boiler, two of the three boilers are in operation, each generating 20 MW. The steam used to heat the deaerator, the flue gas purification system, and the primary and secondary air for the incinerator is supplied by steam extracted from the operating turbines and by steam generated by the waste heat boiler.

　　(4) The unit is equipped with steam extraction, deaeration, and low-pressure heaters for the air preheater and flue gas purification system.

　　(5) After the working fluid is heated, the condensate from the first-stage steam extraction of the boiler air preheater and the flue gas purification system is circulated back to the deaerator. The steam condensate used by each boiler air preheater is also returned to the deaerator.

　　As an important thermal prime mover, the steam turbine plays a vital role in national economic sectors such as energy, power generation and electrical engineering, and national defense.

　　 Turbine Installation Manufacturer: How to Reduce Turbine Losses?

　　A steam turbine is a machine that operates at high speed under high temperature and pressure. Its rotating components are subjected to enormous centrifugal forces, which are directly proportional to the square of the rotational speed. Consequently, as the rotational speed increases, the centrifugal force rises rapidly. During operation, steam turbines incur certain losses. So, how can these losses be reduced?

　　1. Management measures to improve steam consumption rate.

　　2. Improve the flow efficiency of the steam turbine.

　　3. Improve the efficiency of the reheat cycle, strengthen operational adjustments, and raise the reheat steam temperature. During turbine operation, minimize the amount of water injected into the reheater for temperature reduction as much as possible.

　　4. Improve the efficiency of the feedwater regenerative cycle, strengthen equipment maintenance and operational adjustments, and increase the utilization rate of high-pressure heaters as well as the feedwater temperature. Keep the surfaces of heater tubes clean and ensure the tightness of bypass valves. During operation, maintain the heater’s normal drainage water level and reduce the end temperature difference across the heater.

　　5. Maintain the tightness of the thermal system, establish a thermal system leak detection system, and promptly address internal and external leaks in the drainage and drainage systems as well as bypass systems.

　　That’s all. Turbine installation manufacturer Here’s an introduction to the key points on how to reduce turbine losses. Steam turbines operate under high steam parameters and with large flow rates; after a sudden load rejection, the rotor reaches very high dynamic rotational speeds. They are the primary equipment in modern thermal power plants.