A common heat exchange system

Abstract

The invention discloses a public heat exchange system. The public heat exchange system at least comprises heat exchange subsystems with two temperatures, wherein the heat exchange subsystems can be connected with terminal equipment and exchange heat with the terminal equipment; the heat exchange subsystems are connected to a liquid level control device; and the liquid level control device is usedfor controlling media in the heat exchange subsystems to flow into the terminal equipment. According to the embodiment, the heat exchange subsystems are combined into one system through the liquid level control device, the heat exchange subsystems with different temperatures in the total system uniformly adopt a same circulating medium, and cross contamination cannot be generated during switchingof cold and hot working conditions. In the prior art, a plurality of heat exchange systems need to be controlled separately, and a plurality of sets of control equipment are possibly needed. Accordingto the public heat exchange system, the heat exchange subsystems are combined into one system through the liquid level control device, so that efficient energy management and energy-saving control are facilitated by adopting a self-control means.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a public heat exchange system. Background technique [0002] The heat exchange system is an indispensable subsystem in the chemical process, which belongs to the industrial auxiliary system. In the industry, the heat exchange system is usually used to provide energy for the core process unit and cool the product to a specified temperature, reduce the energy consumption of the chemical process, improve efficiency. [0003] At present, the public engineering technology used in the chemical and pharmaceutical fields is relatively primitive and backward, and problems emerge one after another. The main manifestations are: (1) Due to the inconsistency of the medium when the cold and hot working conditions are switched, the medium is cross-contaminated and misoperation is prone to occur. Cause the media to cross each other and waste energy. Circulating water strings into the ref...

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Problems solved by technology

[0003] At present, the public engineering technology used in the chemical and pharmaceutical fields is relatively primitive and backward, and problems emerge one after another. The main manifestations are: (1) Due to the inconsistency of the medium when the cold and hot working conditions are switched, the medium is cross-contaminated and misoperation is prone to occur. Interconnection of media leads to waste of energy

Circulating water strings into the refrigerant liquid, causing the refrigerant liquid to be diluted, and the refrigeration is prone to freezing, resulting in process interruption

The refrigerant is strung into the circulating water, causing the circulating water to be polluted, which is not environmentally friendly

(2) The open cooling tower used for circulating water can easily bring dust and bacteria into the system. At the same time, due to the continuous evaporation of water, salt is continuously analyzed, which makes the circulating water system more and more dirty. Switching into the coolant system

(3) The cryogenic refrigerant system is an open system, and the combination of air oxygen and refrigerant will aggravate the corrosion of the inner wall and pipeline of the equipment and reduce the service life

(4) The existence of the above problems leads to worse and worse performance of the system, greater and greater system resistance, and higher requirements for the circulating pump. Often, the head of the circulating pump is selected to be relatively high, and the energy consumption for operation is relatively high. energy saving

(5) Due to the need to consider the pressure back of the refrigerant, the design of the refrigerant storage tank will be relatively large

(6) The automation level is relatively backward. When the demand at the end of use is small, the circulating pump is still running at power frequency, wasting energy

(7) The characteristic of chemical production is that the demand for process cooling is also peak during the peak power (high price) period of the power grid, and the electricity cost for cooling is very high

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