. The main function of the condensate water system is to heat the condensate water and send the condensate water from the condenser hot well to the deaerator. Strictly speaking, the condensate water system should start from the steam turbine condenser and pass through the deaerator. hot well, condensate pump, mechanical seal heater, low pressure heater to deaerator. But in a broad sense, the condensate system is the process by which condensate flows.
2. A steam-water system that connects these devices to pipes and accessories such as condensers, circulating water pumps, condensate pumps and air extractors is called a condensate water system;
3. The function of the condensate system: the condenser collects the exhaust gas from the steam turbine, pressurizes it through the condensate pump, sends it to the deaerator, and then to the boiler for continuous heating . As pnecessary part of the working fluid cycle it is used. also plays a role in the condensation process. The water is heated and several extraction steam sections in the middle of the steam turbine are collected to heat the condensed water, which increases the thermal efficiency of the steam turbine cycle. (Exhaust loss from steam turbines in thermal power plants reduces the effect)
4. Process
The main condensate flow is: condenser hot well → condensate pump → shaft seal heater → low pressure heater (condensing jellyfish tube) → deaerator → water feed pump ( high pressure cold main tube) and high pressure main tube (high pressure hot main tube). Desalinate water to slag cooler → (drag condensate water) deaerator
5. Operation steps of water desalination and condensate water cut-off of slag cooler>
a. , Contact the boiler station, stop the slag cooler and monitor the slag cooler water temperature.
b. Exit operation on the low steam side of the generator.
c. Close the desalinated water cooling water valve to the slag cooler.
d. Open the degasser room and slide the condensate water to the degasser door.
e. Slowly open the power generation condensing jellyfish pipe to the door of the slag cooling machine, and the operator should pay attention to the normal well liquid level, temperature and pressure of the degasser .
f. Contact the boiler operation, put the slag cooling machine into operation, and pay attention to the water temperature of the slag cooling machine
II. Condenser
1. Commissioning the condenser
1) Open the outlet doorcirculating water of the condenser, open the air door on the water side of the condenser, open the water inlet door and wait until the air door on the water side of the condenser is drained and the water overflows, it is closed, indicating that the water circulation system has entered normal operation.
2) Check if the hot well liquid level rises or open the steam side drain valve of the condenser to see if water flows if the water level rises or if it there is a long flow of water inside. the steam side drain, this means the internal copper pipe of the condenser is leaking.
2. Condensing equipment: consisting of condenser, circulating water pump, condensate pump, air extractor, etc. ;
The function of condenser: establish vacuum and increase the amount of steam in the steam turbine The enthalpy drop available inside improves the working efficiency of the steam turbine; the gases ofThe exhaust is condensed into water, which increases the recycling rate of the feed water, and the vacuum also has the function of deoxidation;
< p>Principle: The steam turbine discharges the steam to the condenser After rapid cooling, when it condenses into water, its specific volume (volume) decreases sharply, forming a vacuum;3. There is an automatic exhaust valve. (safety gauge) on the top of the condenser or on the cylinder When the water circulation is interrupted or the vacuum drops suddenly, causing the pressure in the condenser to be higher than atmospheric pressure,The pressure valve Automatic exhaust works to prevent condenser from deforming or bursting, loosening of copper pipes and leaking of circulating water;