The main purpose of the rubber ball is to clean the dirt on the condenser steel pipes. There is a rubber ball cleaning device in the condenser. It generally consists of a bale loading room, a bale collection net, a cleaning pump and related accessories. When the rubber ball system is put into operation, it plays a role in the circulation of rubber balls in the condenser during launch, collection and cleaning periods. The design pressure of the rubber ball pump should be higher than the maximum working pressure of the circulation. water pump. When putting the rubber balls into operation, the rubber ball is driven into the condenser by the pressure of the rubber ball pump. After entering the condenser, the rubber ball circulates in the steel pipe of the condenser by the circulating pressure. After asee reaches the ball collection net, the rubber ball is pushed into the condenser due to the slightly higher pressure of the rubber ball pump. The rubber ball is drawn into the system pipe and then pumped for circulation. While collecting the ball, close the ball collection net to put the rubber ball back into the net and stop the traffic to collect the rubber ball. View original article>>
How is the generator isolated from the steam turbine?
Steam turbines are typical steam turbines widely used in thermal power plants and modern nuclear power. Steam condensing equipment is an important part of the steam turbine device. Its design, manufacture and quality of operation directly affect the economy and safety of the steam turbine device.
Steam condensing equipment plays the role of soucold rce in the thermodynamic cycle of the steam turbine device. Reducing the turbine exhaust temperature and pressure can improve the thermal cycle efficiency. The main functions of the condenser are, firstly, to establish and maintain a high vacuum at the exhaust port of the steam turbine, and secondly, to utilize the condensed water in the turbine exhaust steam as boiler feed water, thus forming a complete cycle. The condenser maintains a high degree of vacuum by exchanging heat with the circulating water. If the condenser vacuum is too low, it will seriously affect the safe and economical operation of the power plant. One of the important reasons why the condenser vacuum is too low is the scaling of the condenser cooling water pipe. Condenser fouling has a great impact on condenser performance. It increasese not only the turbine tip difference, but also reduces the turbine vacuum and increases the exhaust gas temperature, which affects the economy and safety of the steam turbine.
Analysis of the condenser cleaning case
Case 1: Condenser cleaning
The 2000㎡ condenser of the 25000KW steam turbine of the power plant was cleaned. The vacuum degree of the condenser is -91.5 KPa, the exhaust gas temperature is 43.4°, and the circulating water temperature is 22.5°. The condenser diameter is 2.95 meters, the length is 7.8 meters, the tube length is 6.5 meters, the inlet and outlet circulating water pipe diameter is 800 mm, tubes measure Φ25*0.7mm, scale thickness is 0.1-0.2. mm, there is no algae mud on the surface, and the structure seriously affects the economy and safety of the steam turbine device.
According tocompany personnel, under the same load, the power consumption of the company's steam turbine increases by 200 degrees for every 1 kPa decrease in vacuum degree, and the overall cost increases by 14,000 yuan. Directly clean the scale (calcium and magnesium ions) and passivation pre-film on site. Fostech's high-efficiency environmentally friendly cleaning agent cleans deeper, making equipment more efficient in heat exchange, avoiding equipment corrosion due to stripping, extending equipment life. equipment and reduce business operating costs.
Comparison table between scale thickness and increased power consumption:
Equipment name: Steam turbine condenser
< p> EquipmentPreparation parameters: hull wall 12mm, diameter 2950mm, length 7800mm. The tube plate is made of carbon steel, the tubes are made of stainless steele 304 and the size is Φ25mm * 0.7mm * 6500mm (tube diameter * wall thickness * tube length). The agglomerator has two inlets and two outlets, the inlet water pressure is 0.14Mpa, the outlet water is 0.05Mpa, and the circulating water temperature is 22, 5°. The inlet water temperature is 28°C, the temperature difference when the sludge enters and exits is 10°C, the scale thickness is 0.1-0.2mm, the vacuum of the condenser is -91.5 KPa and the exhaust temperature is 43.4 °C.Cleaning parts: cooling water pipes
Application cleaning agent: Fushtech F1 cleaning agent
Cleaning process:
Equipment cooling water pipes After clogging occurs, the heat exchange efficiency decreases. If the condenser vacuum is too low, it will seriously affect the heat drop and power of the steam turbine. The clogging of thecondenser has a greater impact on the performance of the condenser. increases the turbine tip difference, but also the vacuum degree of the steam turbine is reduced and the exhaust temperature is increased, which affects the economy and safety of the steam turbine. Traditional high-pressure water cleaning can only remove surface sludge and algae, and it is difficult to remove hard scale; Pickling and adding corrosion inhibitors often corrode the metal and often fails to completely remove the scale, affecting the efficiency of heat exchange. Fostech's effective, environmentally friendly and non-corrosive cleaning agent completely dissolves the scale during this cleaning and the tubes reveal their original metallic color, which can improve the efficiency of the turbine unit. steam and reduce the increase in energy consumption and reduction in production ofelectricity. caused by scale and biological algae sludge (Hidden costs: every 1KPa increase in vacuum degree saves 200 degrees of unit energy consumption and saves 14,000 yuan in overall costs). The company is very satisfied with the tartar cleaning effect.
Case 2: Cleaning the condenser
Equipment name: condenser
Equipment parameters: Material: 304 stainless steel Medium: circulating water heat exchange area: 3000 m2; unit.
Application of cleaning product: Fu Shitek F2 cleaning product in a ratio of 1:2.
Fostech F2 special cleaning agent is developed for stainless steel and aluminum materials. It will not cause corrosion, pitting, oxidation and other harmful reactions to stainless steel and aluminum materials. penetrating agent. It can effectively remove the most stubborn scale (calcium carbonate), rustle, oil, mud and other sediments produced in water-using equipment without causing harm to the human body and can greatly extend the service life of the equipment.
Cleaning process:
There is no insulation problem,
The steam turbine obtains energy through the turbine and produces power through the worm (shaft),
The motor is another shell, and the live parts are already isolated from the shell.
Supplement:
The excitation coil is insulated from the iron core and is naturally insulated from the shaft.
If you're not worried, add an insulating fitting...
Actually. The motor body must be grounded.
Sorry, I don't have this information at hand.
I'm just an ordinary electrical engineer and saw the power generation crew didn't look closely inside (no chance).