Circulating water pipe isolation device in condenser chemical cleaning process and isolation method

Abstract

The invention discloses a circulating water pipe isolation device in the condenser chemical cleaning process and an isolation method. The isolation device comprises a sealing device, a supporting plate and an acid-and-alkali-corrosion-resistant traction rope. The sealing device is resistant to acid and alkali corrosion, compressible and cylindrical, the top of the sealing device is provided with an exhaust valve and a pressure gauge, the middle is provided with a traction ring, the bottom is provided with an air inlet valve, and the sealing device is internally provided with a water chamber. The isolation method comprises the steps that before sealing, scaling matter on the inner wall of a circulating water pipeline is polished, the supporting plate is placed on a partition plate of the circulating water pipeline, the sealing device is placed on the supporting plate, compressed air is adopted to inflate the sealing device, a certain pressure is maintained, the sealing device and the supporting plate are fixed through the acid-and-alkali-corrosion-resistant traction rope, and through the expansibility of the sealing device and the gravity of water in the water chamber, the sealing device and the side wall of the circulating water pipeline are sealed. The device is simple in structure, reliable and easy to implement, the construction safety risk of a traditional mode is effectively reduced, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical cleaning of heat exchange tubes of condensers, in particular to a circulating water pipe isolation device and isolation method in the process of chemical cleaning of heat exchange tubes of condensers. Background technique [0002] Once scaling occurs on the water side of the condenser in a thermal power plant, it will lead to an increase in its end difference and a decrease in heat transfer efficiency, which will endanger the safe and economical operation of the unit. At present, the process of chemical cleaning of condensers is very mature at home and abroad. At present, the traditional method of isolating circulating water pipes in the process of chemical cleaning of condensers is to use welding temporary blocking plates for isolation and sealing. This method is labor-intensive, high-cost, and long-term. After the chemical cleaning is completed, there may be hydrogen in the water chamber, and t...

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Problems solved by technology

[0002] Once scaling occurs on the water side of the condenser in a thermal power plant, it will lead to an increase in the end difference and a decrease in heat transfer efficiency, which will endanger the safe and economical operation of the unit

At present, the process of chemical cleaning of condensers is very mature at home and abroad. At present, the traditional method of isolating circulating water pipes in the process of chemical cleaning of condensers is to use welding temporary blocking plates for isolation and sealing. This method is labor-intensive, high-cost, and long-term. After the chemical cleaning is completed, there may be hydrogen in the water chamber, and there is a potential safety hazard of hydrogen explosion during the later dismantling of the system

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