Automatic online cleaning system and method for self-adapting circulating cooling water heat exchanger

Abstract

The invention provides an automatic online cleaning system for a self-adapting circulating cooling water heat exchanger. The system comprises a heat exchanger, a centrifugal pump and a water storage tank which are sequentially connected through a pipeline so as to form a closed loop, wherein two blowdown tanks are parallelly mounted at the two ends of the water storage tank, a branch pipe is mounted on a pipeline of a water inlet end of the heat exchanger and is connected to an air compressor, the blowdown tanks are connected to an automatic ice maker, and filtering devices are arranged in the blowdown tanks; temperature sensors, flowmeters and conductivity meters are mounted on the pipeline at the water inlet end and water outlet end of the heat exchanger and are all connected with a data acquisition system, the data acquisition system is connected with a computer and transmits data signals of the temperature sensors, flowmeters and conductivity meters to the computer for processing, the computer is connected with a control system, and the control system is connected with the automatic ice maker and controls the startup and shutdown of the automatic ice maker. According to the automatic online cleaning system and method for the self-adapting circulating cooling water heat exchanger, the data acquisition system can be used for acquiring temperatures of water inlet and water outlet of the heat exchanger and carrying out feedback, and the computer gives an instruction to the control system so as to automatically adjust cleaning volume.

Description

technical field [0001] The invention relates to an automatic online cleaning system and method for an adaptive circulating cooling water heat exchanger. Background technique [0002] Heat exchanger is one of the widely used equipment in chemical industry and power field. Its function is to transfer heat from hot fluid to cold fluid. Circulating cooling water heat exchanger is an indispensable equipment in the cooling system of modern industrial production lines. [0003] Heat exchanger fouling is a common phenomenon, but also a problem that needs to be solved urgently. In the design stage, due to the fact that the dirt resistance value lower than the actual dirt is selected during the design, after the heat exchanger has been in operation for a period of time, the heat exchange is insufficient, and a new heat exchanger needs to be added for parallel operation, which increases the investment. Therefore, the heat exchanger Due to fouling, frequent cleaning is required, and eq...

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Problems solved by technology

[0006] The invention proposes an automatic online cleaning system and method for an adaptive circulating cooling water heat exchanger, using the automatic online cleaning system transformed from a traditional cooling system and a matching three-phase cleaning method to realize the cleaning of the heat exchanger Efficient and automatic online cleaning, that is, reducing the input cost and operating cost of the system, and solving the problem of regular shutdown of production caused by offline cleaning, which leads to significant increase in maintenance costs and production shutdown losses. However, the existing online cleaning system is complex and the cleaning effect is not good. The problem

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