Temperature control method for opening and closing of three valves of four-fluid heat exchanger

Abstract

The invention provides a temperature control method for opening and closing of three valves of a four-fluid heat exchanger. A first valve, a second valve and a third valve are arranged at inlets of afirst heat exchange pipe, a second heat exchange pipe and a third heat exchange pipe, a first temperature sensor, a second temperature sensor and a third temperature sensor are arranged in a left sidepipe, a center pipe and a right side pipe respectively and used for detecting temperatures in the left side pipe, the center pipe and the right side pipe, and a controller controls opening and closing of the first valve, the second valve and the third valve according to the detected temperatures of the left side pipe, the right side pipe and the center pipe, thereby controlling whether heat change is performed on first, third and second fluids or not. The new fluid is started to perform alternate heat exchange by detecting temperature change in the left side pipe, the right side pipe and thecenter pipe, so that elastic pipe bundles are continuously driven to vibrate and heat exchange efficiency and descaling operation can be further realized.

Description

technical field [0001] The present invention is a further improvement of the previous application, which is applied to the field of heat exchangers. The invention relates to a shell-and-tube heat exchanger, in particular to a shell-and-tube heat exchanger for gas heat exchange. Background technique [0002] The invention relates to descaling of heat exchangers, which is a new invention of shell-and-tube heat exchangers based on the research and development of Qingdao University of Science and Technology (application number 2019101874848). [0003] Shell-and-tube heat exchangers are widely used in chemical, petroleum, refrigeration, nuclear energy and power industries. Due to the worldwide energy crisis, in order to reduce energy consumption, the demand for heat exchangers in industrial production is also increasing. The quality requirements for heat exchangers are also getting higher and higher. In recent decades, although compact heat exchangers (plate, plate-fin, press-w...

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Problems solved by technology

[0009] In the previous application, a shell-and-tube heat exchanger with heat exchange of four fluids has been developed, but the above-mentioned shell-and-tube heat exchanger is controlled according to the cycle, resulting in poor vibration heat exchange effect and partial intelligence. Low

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