Method for monitoring thermal resistance of heat-exchange equipment

Abstract

The invention discloses a method for monitoring thermal resistance of heat-exchange equipment and belongs to the field of fouling monitoring of circulating systems. The method comprises the following steps: acquiring a cold water inlet pipe temperature value of a heat exchanger, a cold water outlet pipe temperature value of the heat exchanger, a hot water inlet pipe temperature value of the heat exchanger and a hot water outlet pipe temperature value of the heat exchanger through a temperature sensor; and respectively arranging flow meters on a hot water loop and a cold water loop of the heat exchanger, acquiring hot water heat exchange flow and cold water heat exchange flow of the heat exchanger through the flow meters, and calculating to measure the thermal resistance value according to the measured temperature value and flow value. According to the method, the thermal resistance in the heat exchange equipment can be efficiently and accurately monitored, and an accurate electromagnetic pulse dirt treatment evaluation method can be established through cooperation of the conductivity and pH value of an aqueous solution.

Description

technical field [0001] The invention belongs to the field of dirt monitoring of circulation systems, in particular to a thermal resistance monitoring method of heat exchange equipment. Background technique [0002] Heat exchange equipment is one of the most common thermal equipment in industrial production, widely used in electric power, chemical industry, petroleum, metallurgy and other industries. It is not only the equipment used to ensure the process flow and conditions, but also the main equipment to realize heat recovery and develop and utilize industrial secondary energy. According to the survey, more than 90% of the heat exchange equipment have different degrees of fouling problems. The harm caused by dirt is so great, so it has been widely concerned and researched by scholars from all over the world. At present, the commonly used antiscaling and descaling methods are attributed to chemical methods and physical methods. The chemical method is mainly to add chemical...

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Problems solved by technology

Among them, the high-frequency electromagnetic pulse method has been widely studied due to its simple operation, environmental protection, and small investment, and has broad application prospects in industrial production and daily life. However, its mechanism research is controversial at home and abroad. The theory is not mature enough, resulting in slow progress in popularization and application of high-frequency pulse antiscaling technology

Compared with the development of water treatment technology, the development of fouling monitoring technology is relatively backward, causing users to be unable to effectively prevent scale, and even restricting the further development of the entire water treatment industry

[0003] At present, the commonly used scale inhibition effect evaluation methods include direct observation method, hanging plate method, etc. In the experiment, parameters such as conductivity and pH value of the aqueous solution are also used to illustrate the scale inhibition effect, but compared with the development of scale inhibition technology, The research progress of scale inhibition evaluation methods is very slow, which is not conducive to researchers to choose more suitable scale inhibition methods, which restricts the further development of scale inhibition technology and the entire water treatment industry

However, the evaluation of the scale inhibition effect needs to be applied to monitor the fouling thermal resistance of the heat exchange equipment. There is no effective and accurate thermal resistance monitoring method in the prior art.

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