On-line cleaning rate test method and device for shell-and-tube heat exchanger

Abstract

The invention discloses an on-line cleaning rate test method and device for a shell-and-tube heat exchanger. The on-line cleaning rate test method comprises the following steps: injecting a reagent into a heat exchange tube; after soaking the reagent in the heat exchange tube for a preset period of time, extracting the reacted reagent in the heat exchange tube; detecting calcium and magnesium ions in the reacted reagent in the extraction process. The on-line cleaning rate test device comprises a positioning device and a reagent tank, wherein a dirt cleaning injection nozzle is arranged on the positioning device; the reagent tank is connected with a corrosion box, in which corrosion samples are arranged, through a liquid charging pump; the corrosion box is connected with a liquid charging valve; the liquid charging valve is connected with the dirt cleaning injection nozzle. The on-line cleaning rate test device further comprises a liquid storage tank connected with a calcium and magnesium ion tester, the calcium and magnesium ion tester is connected with a pH tester I, the pH tester I is connected with a filter, the filter is connected with the corrosion box through a liquid return valve, and the reagent tank is equipped with a pH tester II. The on-line cleaning rate test method and device provide reliable guarantee for a power plant to determine the optimal cleaning period and cleaning mode and to achieve the optimal cleaning effect with the minimal cost.

Description

technical field [0001] The invention belongs to the field of chemical cleaning of industrial heat exchangers, and in particular relates to a method and device for on-line testing of the cleaning rate of tube-and-tube heat exchangers. Background technique [0002] The shell and tube water cooler is one of the main auxiliary equipment widely used in industrial sectors such as power, chemical, petroleum, and atomic energy. It is responsible for the important cooling tasks of various power, electrical, mechanical and chemical reaction equipment. Its working performance is good Damage has an important impact on the safety and economic operation of enterprises. In the process of heat transfer, scale and stains are easily formed on the inner wall of the water side of the heat exchange tube in the tube-and-tube water cooler due to the influence of heating and water quality, which will have a negative impact on the performance of the heat exchanger. How to remove scale and stains in ...

AI Technical Summary

Problems solved by technology

[0006] 1) Condenser rubber ball cleaning method (this method is the standard configuration of the power plant): put a large amount of rubber balls into the condenser water, the rubber balls flow with the circulating water, and clean the heat exchange tubes through the condenser heat exchange tubes , although it can play a certain role in descaling, since the cleaning rate in the tube cannot be determined, it can only be put in regularly according to experience, which has a certain blindness, and it is easy to generate excessive cleaning and cause waste; there are a lot of papers on this issue. explored

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