Flow guide anti-smashing system suitable for double-flow surface water-cooled condenser of intercooling unit

Abstract

The invention provides a flow guide anti-smashing system suitable for a double-flow surface water-cooled condenser of an intercooling unit. The flow guide anti-smashing system comprises the double-flow surface water-cooled condenser, a flow guide anti-smashing system body and the like. The flow guide anti-smashing system body is additionally arranged on the throat portion of the double-flow surface water-cooled condenser, a steam turbine belongs to high-speed rotating machinery, a last-stage blade is the longest stage of all stages of blades, bears the maximum centrifugal force load and stress generated by the maximum centrifugal force load, and has the risk of breakage and falling off after long-term operation, once the last-stage blade falls into the condenser, a heat exchange tube bundle of the condenser can be smashed, and the condenser cannot work normally. The flow guide anti-smashing system body can prevent the situation that the last-stage blade of the steam turbine is broken and falls off, or other falling-off parts directly fall into the condenser, and meanwhile steam exhaust and flow guide are conducted on the steam turbine. Through implementation of the flow guide anti-smashing system suitable for the double-flow surface water-cooled condenser of the intercooling unit, the situation that the falling-off parts in the steam turbine directly fall into the condenser can be prevented, meanwhile, steam exhaust and flow guide are conducted on the steam turbine, and the operation safety and economic efficiency of the double-flow surface water-cooled condenser are improved.

Description

technical field [0001] The invention belongs to the field of power station boiler and steam turbine systems, and in particular relates to a flow diversion and anti-smashing system for a double-flow surface water-cooled condenser of an intercooler unit. Background technique [0002] The condenser is a heat exchanger that condenses the exhaust steam of the steam turbine into water, also known as the rehydrator. Condensers are mainly used in steam turbine power plants and are divided into water-cooled condensers and air-cooled condensers. The condensing equipment acts as a heat sink in the thermodynamic cycle of the steam turbine unit. Reducing the exhaust steam temperature and exhaust pressure of the steam turbine can improve the thermal cycle efficiency. The main function of the condenser is to establish and maintain a high vacuum at the steam exhaust port of the steam turbine, and to use the condensed water at the exhaust steam of the steam turbine as boiler feed water to ...

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Problems solved by technology

[0004] The speed of the steam turbine is 3000r / min, which is a high-speed rotating machine. The work done by the steam in the steam turbine is accompanied by the decrease of pressure and temperature, and the expansion of volume. Since the steam pressure of the last stage is the lowest, the required volumetric flow rate is also the highest. Therefore, the final stage The blade is the longest one among the blades of all stages of the steam turbine, and bears the largest centrifugal force load and the resulting stress, and the blade of the last stage of the steam turbine has been working in the wet steam containing water droplets for a long time, and there is a risk of breaking and falling off, while the blade of the last stage of the steam turbine The centrifugal force when it falls off is very large. Once it falls into the condenser, it will damage the heat exchange tube bundle arranged in the condenser, causing the condenser to not work normally, polluting the condensed water, and affecting the safe operation of the steam turbine unit.

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