The condenser is an important nuclear balancer equipment in nuclear power plants, mainly used to condense steam into water. Titanium tubes are the main material of condensers. They have the advantages of high strength, corrosion resistance, oxidation resistance, and low density, so they are widely used in the nuclear power industry.
In recent years, with the continuous development of nuclear power plants, the use of condenser titanium tubes has become more and more extensive. However, titanium tubes often scale or even clog during use. Scaling will affect the heat exchange efficiency and reduce the performance of the equipment. Therefore, regular cleaning is very necessary. The following are some commonly used condenser titanium tube scaling cleaning methods.
Physical cleaning methods are usually used to remove hard scale or large impurities that are difficult to remove by chemical cleaning. However, if the mechanical brush is used for mechanical cleaning, it will damage the tube wall if the operation is not careful. In this regard, the high-pressure cleaning machine uses the huge impact force of the high-pressure water jet to quickly impact the scale to achieve the cleaning effect. It has become a common cleaning method for the condenser titanium tube of the nuclear power plant. It can be used to remove sediments and mild scale, as well as to clean the titanium tube in a blocked environment. It is suitable for daily cleaning and maintenance. For stubborn or chemically complex scale, it may be necessary to combine other cleaning methods.
High-pressure cleaning machine for cleaning scale of condenser titanium tubes in nuclear power plants
For long-term operation, which may cause adverse effects such as sludge deposition, pipe corrosion, unstable steam pressure and unstable operation, we recommend the use of 75L/300bar high-pressure cleaning machine for cleaning. The cleaning pressure is 300bar and the flow rate is 75L/min. It can perform long-term cleaning operations. It uses a 45kw motor as the power source and uses splash lubrication crankshaft drive. The equipment is equipped with a water inlet pressure regulating pump, ABB component control box, water shortage protection system, and complete electrical safety protection system.
Steps for cleaning the titanium tube of the condenser with a high-pressure cleaner:
1. Shutdown and preparation: Make sure the condenser system is completely shut down and cooled. Drain the water in the condenser to ensure that the inside of the pipe is dry to prevent moisture from affecting the cleaning effect.
2. Equipment preparation: Use high-pressure water cleaning equipment, usually a high-pressure water pump and a matching nozzle. Confirm that the pressure range of the equipment is suitable for the tolerance of the titanium tube.
3. Select the nozzle: Select the appropriate nozzle type according to the type of scaling and the diameter of the pipe. Rotating nozzles or multi-angle nozzles help to clean comprehensively.
4. Cleaning operation: Insert the nozzle into the titanium tube and perform high-pressure water cleaning section by section. High-pressure water flow is sprayed through the nozzle to impact the scaling material, loosen it and discharge it with the water flow.
5. Cleaning inspection: Check the cleaning effect regularly during the cleaning process to ensure that the scale is effectively removed. Adjust the nozzle angle or increase the cleaning pressure if necessary.
6. System recovery: Check the cleaning effect, confirm that there is no residual scaling material, reassemble the condenser system, and conduct a trial run inspection.
Precautions for cleaning the titanium tube of the condenser of a nuclear power plant with a high-pressure cleaner:
1. Pressure control: High-pressure water flow has limited tolerance to titanium tubes, and excessive pressure may cause damage to the pipeline. The water pressure should be strictly controlled within a safe range.
2. Safety measures: When operating high-pressure water equipment, appropriate personal protective equipment must be worn to avoid harm to the operator caused by high-pressure water flow.
3. Environmental protection: Collect and treat wastewater generated during the cleaning process to avoid impact on the environment.
