Quick cleaning equipment and cleaning method for large heat exchanger

Abstract

The invention discloses a large-scale heat exchanger quick cleaning equipment, a large-scale heat exchanger quick cleaning equipment, including a tube heat exchanger, a U-shaped heat exchanger, a power plant condenser, a cleaning system and several A quick-sealing connector, the quick-sealing connector is movably connected to the heat exchanger, and the cleaning system is connected to the quick-sealing connector through a connecting pipe; the cleaning system includes at least a main control system, a sub-control system, The liquid supply sub-control subsystem and the liquid return sub-control sub-system, the liquid supply sub-control sub-system transports the liquid to one end of the inner tube of the heat exchanger through the quick seal joint, enters the heat exchanger, and in the heat exchanger The other end of the tube sends the liquid back to the liquid return sub-control subsystem through the quick-sealing connector; this cleaning equipment realizes the flexible and fast cleaning of large tube-and-tube heat exchangers, improves the cleaning efficiency and effect, saves costs for the enterprise, and contributes to the national Energy saving; and each system can be quickly assembled, expanded at will, and easy to carry.

Description

technical field [0001] The invention relates to cleaning equipment, in particular to a quick cleaning equipment and cleaning method for a large heat exchanger. Background technique [0002] 1. The concept of heat exchanger [0003] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers are common equipment in chemical, petroleum, power, food and many other industrial sectors, and play an important role in production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers devices, etc., the application is more extensive. Due to their different uses, heat exchange equipment has many types and different performances, but they can all be classified into two categories: shell-and-tube structure and plate structure. [0004] Second, the working principle of the heat exchanger [0005] A heat exchanger is a device that transfers part of t...

AI Technical Summary

Problems solved by technology

[0008] The first is mechanical cleaning, usually high-pressure water cleaning, using a high-pressure cleaner to pressurize the water to more than 300-1000 kg to clean the inner wall of the heat exchanger tube. Difficult to operate; brushes, rubber balls, etc. are cleaned with high-pressure water or high-pressure compressed air, and the current effect is not ideal

[0009] The second is conventional chemical cleaning, which uses a chemical method to prepare acidic chemical cleaning agents and pour them into the heat exchanger for bubbling cycle cleaning. A large amount of acidic cleaning agents are required for cleaning, because these cleaning agents are all chemicals (such as hydrochloric acid, sulfuric acid, and mildew). etc.) to achieve the cleaning effect of the heat exchanger, it is necessary to keep the pH value of the cleaning agent in the cleaning (such as cleaning the scale on the inner wall of the heat exchanger, the pH value should be less than 2, if the pH value is in a weak acid state of 5-6 , the cleaning agent needs to stay in the heat exchanger for a long time, and the long-term stay will be corrosive to the heat exchanger) within the effective range, while cleaning the scale, the metal will also be corroded. After the heat exchanger is cleaned, these Cleaning agents need to be neutralized to meet emission standards before they can be discharged, so a large amount of chemicals are not only wasted but also have an impact on the environment

Scaling causes the working efficiency of the condenser to be greatly reduced, which affects the economy and safety of the unit operation. In order to ensure that the output of the unit can be at half load during normal low peak loads, the condenser can be cleaned quickly without waiting for the overhaul period. It can be cleaned at any time as needed, and the cleaning agent after cleaning can be discharged directly, because we use an environmentally friendly cleaning agent

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