Robot technology of on-line cleaning power plant steam condenser using high pressure water jet

Abstract

The invention relates to an electric power plant condenser high pressure water shooting flow online washing robot technology that cleans the electric power plant condenser by high pressure water shooting flow. Setting the mechanism arm locating device and high pressure soft tube into the condenser by using the combination method and install structure of locating mechanism arm orientation device formed by extending mechanism arm and rotating mechanism arm, high pressure soft tube manage device, and high pressure spray head control device, locates the spray head on the rotating mechanism arm by computer control system, sends to the inner of the condenser copper pipe, and cleans the dirt in the inner of the condenser copper pipe by high pressure water shooting flow. The generating set needs not stop while cleaning. The invention has advantage of simple structure, no pollution and high reliability.

Description

technical field [0001] The invention relates to a high-pressure water jet on-line cleaning robot technology for a condenser of a power plant, and is especially suitable for on-line cleaning and descaling of copper tubes of the condenser without affecting the normal power generation of the power plant. Background technique [0002] Condenser is one of the main auxiliary equipment of thermal power plant, and it is responsible for the important task of cooling the exhaust steam of steam turbine. Its working performance has an important impact on the power generation efficiency and coal consumption rate of power plant. The condenser is composed of thousands of copper tubes. The steam flows out of the copper tubes, and the cooling water flows in the copper tubes. Due to the existence of heat exchange, the salt in the cooling water is continuously precipitated during the continuous heating process, forming a large amount of scale and adhering to it. On the tube wall, the vacuum in...

AI Technical Summary

Problems solved by technology

With the increase of unit capacity, the number of units adopting circulating cooling increases, the scaling of condensers tends to be common and serious, and the number and size of copper pipes increase, making manual scrubbing difficult, and because off-line cleaning must be stopped after It can be done, but the cost of starting, shutting down and manual cleaning is very high, about 1 million yuan (calculated based on a 300,000-kilowatt unit), and the fouling generated during the operation of the unit cannot be removed in time, the cleaning efficiency is low, and the labor intensity is high.

On-line descaling usually includes: 1) Putting rubber balls in the condenser to clean, although it can play a role in descaling, it cannot effectively remove scale, and the amount of rubber balls is large, the recovery rate is low, and the operating cost is relatively high. high

2) Cleaning with chemical agents. As the capacity of the unit increases, the number of units adopting circulating cooling increases, and the fouling of the condenser tends to be common and serious. Frequent use of hydrochloric acid for cleaning and descaling will lead to corrosion of the copper tube of the condenser. Reduce the service life of the unit

Taking a 300MW unit as an example, the cleaning fee for one unit is about 2 million. It not only has high operating costs, but also pollutes the environment.

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