Working Principle of Condenser:
Condenser: The steam discharged after driving the steam turbine to do work becomes condensed water after an expansion process is completed in the machine, during the condensation process, exhaust steam; urgent volume.
The working principle of surface condenser:
The condenser is equipped with a large number of copper tubes; it is a heat exchange device that transforms the steam discharged after driving the turbine into condensed water. After the steam has completed its expansion process in the steam turbine, during the condensation process, the volume of the exhaust steam decreases sharply and a high vacuum is formed in the space initially filled with steam. The condensate water is transported into the boiler via the condensate water pump via the feed water heater, feed water pump, etc., thus ensuringthe continuous progress of the entire thermodynamic cycle. In order to avoid pipeline corrosion caused by increased oxygen content in condensate water, the condenser of modern large-capacity steam turbines is also equipped with a vacuum degasser.
Structural description:
The structure of the condenser is single-shell, split, single-flow surface type.
The condenser is a single-flow split monocoque surface condenser, arranged transversely in the lower part of the low-pressure cylinder. The condenser shell is placed on a spring support, and its upper part is rigidly connected to the turbine exhaust cylinder. Circulating water flows through the condenser tube bundle to condense the turbine exhaust steam in the condenser shell. The condensed water is collected in the hot well and discharged by the condensed water pump.
A bundle of tubest arranged in the condenser shell and the hot well is placed under the shell. At normal water levels, its water volume is not less than the flow rate of the condensing water pump during operation. 4 minutes.
The condenser consists of a single process shell and a tube bundle. The tubes are copper alloy tubes and are cooled with fresh water.
The throat of the condenser is connected to the exhaust pipe of the low pressure cylinder of the steam turbine. The diameter of the upper fitting is: 7532×6352. It is made in two halves, i.e. 7890×3355×1980. . The wall plate of the connection neck is made of 16mm thick steel plate. The internal welded ribs (δ16) are reinforced and the side plates are reinforced with No. 18 angle steel and No. 20a φ102--φ159 channel steel pipes to give them sufficient rigidity.
The lower part of the neck has the shape of a truncated cone and is madein three sections. The dimensions of the left and right sections are 12100×2600×3841, as well as the size of the middle section. is 12100 × 2300 × 3841. The side plates of the lower neck are made of 20mm 20g thick steel plate, internally welded ribbed plate, and diagonal support of reinforced pipe. There are two desuperheaters on the right side of the lower neck (cooling water inlet manifold side). It belongs to the scope of supply of low voltage bypass device.
Condenser:
A heat exchanger that condenses turbine exhaust steam into water, also called a rehydrator. Condensers are mainly used in steam turbine electrical appliances and are divided into two types: water-cooled condensers and air-cooled condensers. In addition to condensing the steam turbine exhaust steam into water for collectionUsed in the boiler, the condenser can also establish and maintain a vacuum at the steam turbine exhaust.
The main functions of the condenser:
1) Create a higher vacuum at the exhaust port of the steam turbine so that steam can flow through the turbine steam
p>2) Move the steam turbine The steam discharged from the low pressure cylinder condenses into water and is returned;
3) Gather various hydrophobic materials to reduce the loss of steam and water;
4) The condenser is also used to add desalinated water (normal water replenishment);
Technical characteristics:
< p>1. Fast: Two people can carry out cleaning operations at the same time. time and can be cleaned every hour. Clean 1000 condenser tubes. During cleaning, sides A and B can be cleaned in turn without stopping, reducing consumption.reduce condenser maintenance time. It is especially suitable for thermal power plants to repair and clean the condenser without stopping when the condenser vacuum is low in summer (the condenser manned door can be cleaned without removing the end cover).2. Safety: Special polyethylene material - safe and does not damage the expansion of the pipeline and tube sheet. It is particularly suitable for cleaning thin-walled copper tubes and titanium tubes in power plant condensers.
3. High efficiency: Generally speaking, the cleaning warhead is cleaned once it passes through the pipeline with a large amount of dirt or for the first cleaning, it can be cleaned again. clogged with sediment, it has been If you do not see the lit tube on the opposite side, fire an empty gun before inserting bullets into it to clear it. After cleaning, the effect isobvious. After several cleanings, the final difference is significantly reduced, which significantly improves the efficiency of the unit.
4. Easy to inspect: The cleaning ball will completely remove dirt from the condenser pipeline. The cleaning effect is remarkable, and the inspection and cleaning effect is clear at a glance.
5. Low cost: The cleaning price is only half of the price of high pressure water jet cleaning.