Centralized heat supply control system

Abstract

The invention relates to a centralized heating control system, in particular to a centralized heat supply transportation-distribution energy saving system suitable for a secondary network. The invention aims at overcoming the defects of the background art and providing a centralized heat supply transportation-distribution energy saving system suitable for a secondary network. The energy saving system has the characteristics of high efficiency, large frequency conversion amplitude, energy saving, has simple and reasonable structure as well as accurate and reliable use. The heat supply energy saving control system comprises a circulation pipeline communicated with a heat exchanger, and the circulation pipeline is provided with a plurality of branch pipelines connected with heat users. The heat supply energy saving control system is characterized in that the circulation pipeline is provided with a circulation water pump on which a frequency conversion controller for controlling the frequency conversion of the circulation water pump is arranged; and the branch pipelines are provided with temperature control regulating valves connected with the heat users.

Description

technical field [0001] The invention relates to a central heating system, in particular to a central heating transmission and distribution energy-saving system suitable for a secondary network. Background technique [0002] With the development of measurement technology, monitoring technology, automation technology and computer technology, my country's heating industry is currently entering a rapid development stage of intensive management and intelligent automation control. [0003] At present, the cities north of the Huaihe River basically use central heating for heating; in the transmission and distribution system of the secondary pipeline network of central heating, energy consumption is mainly due to the heat load of users and circulating water pumps. In order to ensure that the heat load of the user is within a reasonable range (not too high or too low), a static balance valve is generally installed in front of the unit building to control the flow of the unit. Since ...

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Problems solved by technology

Since the static balance valve can only distribute the flow in proportion, when the heat load at the end of the valve changes, the static balance valve cannot ensure the reasonable distribution of energy, resulting in the "thermal imbalance" of the secondary network and generating serious energy Waste phenomenon, that is, constant frequency and no energy saving; in addition, the secondary network circulating water pump generally adopts constant pressure water supply. The range of frequency conversion is very limited, and the margin of frequency conversion cannot be utilized, resulting in a low degree of frequency conversion energy saving, resulting in potential waste of pump power

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