Condenser pipe change and technical transformation
1. Condenser action
Condenser is an important part of steam turbine, its role is to condense the exhaust gas of condensing steam turbine into water, and maintain the required vacuum.
2. structure
The condenser is composed of a fully welded structure composed of shell, water chamber, pipe plate, cooling pipe, intermediate pipe plate, baffle plate and condenser aggreator. The shell and the water chamber are welded into a whole, and the shell is a steel plate welded structure. In the upper shell, water chamber and heat and human hole cover, for maintenance. Inner tube with pipe or welding common fixed on the end tube plate, in the middle of the partition support tube upward deflection to prevent resonance, the tube bundle arrangement using HEL-6 design technology, this is the international general design standard of condenser, with the technology design of condenser for air centripetal, arc arrangement, triangle arrangement, because of the characteristic is small air resistance, cooling degree is small.
In the middle of the pipe bundle, there is a wide pipe from the inlet to the hot well, and the two sides are arranged in a ribbon, on the outside of the belt, and another part of the pipe is steam scouring. Use stainless steel pipe, arranged between the steam channel baffle plate to prevent steam short circuit.
3. Main specification parameters
4. The condenser is an important cold source equipment for steam turbine generator sets. Due to the pollution of river, lake and sea water system, the corrosion speed of the condenser cooling pipe is aggravated, resulting in frequent leakage of the condenser, which seriously affects the normal production. In particular, the copper tube is susceptible to ammonia ion, sulfide and other corrosion caused by leakage. At the same time, because the inner wall of the copper pipe is not smooth and easy to attach to microorganisms and various dirt, the service life of the copper pipe is greatly reduced.
Our company set up a professional mechanized pipe changing engineering team, mainly engaged in the power plant condenser, high and low voltage heater, heat network heater, oil cooler, cold water heater and other pipe heat exchanger stainless steel pipe, copper pipe, titanium pipe old pipe removal and new pipe installation project. In the long-term practice of condenser pipe change, our company has explored a complete set of advanced pipe changing process. It has a high reputation in the field of condenser pipe change, and provides services throughout most power plants in the country, and has been praised by power plants for many times.
The installation team has all kinds of special machinery and tools, such as pipe drawing, pipe expansion, pipe piercing, pipe cutting, pipe hole cleaning and other special machinery and tools needed in the pipe changing project. Can contract a variety of heat exchanger pipe change installation project, with a short construction period, excellent quality and other characteristics.
At the same time, our unit also undertakes the manufacturing of new condenser and the project of increasing the heat transfer area while keeping the shell motionless (remove the end plate, partition and other parts in the old condenser, according to the area needed to increase the pipe design, re-process the end plate, partition and other parts.
5. technological superiority:
The pipe plate hole expands on the site (the copper pipe does not need to be open, directly expanded). Ensure that the pull-off force of the heat exchange pipe reaches more than 1000kg;
(1) The tube plate and the tube plate hole are restored if new, and the tube plate hole has no burr;
(2) The appropriate pipe expansion rate, that is, no underdistension and no overdistension, to ensure that the expansion mouth is not loose and no leakage for a long time
(3) Independent development of a series of special pipe changing tools!. Practical and durable;
(4) Mature and rich experience in on-site tube changing;
(5) A professionally trained management replacement team;
(6) High quality, high efficiency, short cycle to complete the construction tasks;
(7) Material selection and operation and maintenance consultation of the condenser cooling pipe;
(8) In the construction can be large quantities of quickly all pipe change, can also do a single and local pipe change.
