Why should the condensate recirculation be placed behind the shaft?

The recirculation of the condensate pump will be opened when the flow rate of the mother pipe is lower than a certain value, so as to ensure the lowest flow rate of the condensate pump, prevent the pump from vaporizing, and also ensure the pressure of the sealing water of the feed pump. The reheated one is generally drawn from the middle tap of the feed pump.

In the boiler, the water is heated into superheated steam, and then passed into the steam turbine to do power generation, and the exhaust steam that has done the work is finally condensed into water in the condenser, and then enters the boiler for recycling, which shows the status of water in the power plant.

There are many kinds of water in power plants: circulating water, feed water, cooling water for various rotating machinery, ......The supply of this water and the daily coal quality tests of the boilers are carried out in the chemical workshop.

In the chemical workshop, there are mainly pretreatment equipment: inclined tube sedimentation tank, filter and valveless filter, etc., these equipment are mainly to remove impurities and suspended solids in the circulating water, ensure the water use of the industrial water system and fire water system of the plant, and supply the source of chemical desalination water.

Desalination equipment: male bed, shaded bed, mixed bed, etc. As the name suggests, through the adsorption of these anion and cation beds, the ions in the water are removed to ensure that the water quality of the water supply system entering the main plant is qualified.

Dosing equipment: such as desalinated water with ammonia treatment, circulating water with chlorination, etc. In order to better meet the quality of the water required in production, the operation of these equipment is indispensable.

1. It is very necessary to adopt an effective system to maximize the heat energy and softened water of the system, which can not only save energy and reduce consumption, but also eliminate the pollution caused by the discharge of secondary flash steam to the plant environment, which has a very important significance in terms of economic and social benefits.

2. Due to the reduction of the use of coal after the closed type, the beam cover also reduces the amount of carbon dioxide emitted into the atmosphere, effectively realizing energy conservation and emission reduction, especially at the moment when global warming caused by greenhouse gas emissions has attracted widespread attention from the international community and all levels of China;

Taking measures to reduce carbon dioxide emissions can fully demonstrate a corporate image of actively undertaking social responsibility, enhance the visibility and prestige of the enterprise in the public, and help the enterprise to open up the market.

Coagulation. In the general atmosphere, when the actual water vapor pressure is greater than the saturated water vapor pressure on the water surface at that temperature, the water vapor condensation process will occur; However, in a clean atmosphere, the actual water vapor pressure needs to reach more than 6 times the saturated water vapor pressure on the water surface before the water vapor will condense, which is spontaneous condensation.

If the atmosphere contains aerosol particles that absorb moisture, condensation can occur at a condition slightly below the saturated water vapor of the water surface. If these aerosol particles contain sulfates, nitrates, etc., they can be dismantled as acid slag to form acid rain.

The functions of condensate recirculation are: When the steam turbine is started, shut down or under low load, due to the small amount of condensate, the recirculation door is opened at this time to make the condensate return to the condenser, so as to ensure that the extractor has enough cooling water to maintain normal operation.

Because in the initial stage of steam turbine starting, the condensate system and shaft addition must be operated, and the low and large are started randomly, but because the condensate water quality is unqualified, it cannot be used to the deaerator, so the condensate is recirculated behind the shaft, and the starting and discharge of the condensate is connected behind the low plus outlet to ensure that both the shaft plus and the low plus have cooling water.

A steam turbine is a rotating power machine that converts the energy of steam into mechanical work. Also known as steam turbines. It is mainly used as a prime mover for power generation, and can also directly drive various pumps, fans, compressors and ship propellers.

Because in the initial stage of steam turbine starting, the condensate system and shaft addition must be operated, and the low and large are started randomly, but because the condensate water quality is unqualified, it cannot be used to the deaerator, so the condensate is recirculated behind the shaft, and the starting and discharge of the condensate is connected behind the low plus outlet to ensure that both the shaft plus and the low plus have cooling water.

Because in the early stage of the steam turbine start, the condensate system and shaft plus must be operated, and the low and large are randomly started, but because the condensate water quality chain is unqualified, it cannot be used to the deaerator.

Therefore, the condensate recirculation is connected to the back of the shaft, and the starting discharge of the condensate is connected to the back of the low plus outlet to ensure that both the shaft plus the low plus have cooling water.

Steam turbines convert the energy of steam into mechanical work.

of rotating power machinery. It is also known as steam permeability shed leveling. It is mainly used as a prime mover for power generation, and can also directly drive various pumps, fans, compressors and ship propellers. Wait.

1. The flow rate in the system is small at the initial stage of starting, and the recirculation increases the flow rate in the circuit to prevent the condensate pump from generating cavitation (brief function of the main gear).

2. Cooling shaft seal heater, in the initial stage of start-up and when the load is low, the condensate flow is very small, if the shaft seal heater is not fully cooled, the shaft blower outlet may contain steam, it is not easy to form a slight negative pressure, resulting in poor shaft seal steam return, so the model is stupid Hu recirculation inlet after the shaft seal heater.

Because in the initial stage of steam turbine starting, the condensate system and shaft addition must be operated, and the low and large are started randomly, but because the condensate water quality is unqualified, it cannot be used to the deaerator, so the condensate is recirculated behind the shaft, and the starting and discharge of the condensate is connected behind the low plus outlet to ensure that both the shaft plus and the low plus have cooling water.

Let's see what others have to say.