Overall optimization energy-saving method for circulating water system

Abstract

The invention discloses an overall optimization energy-saving method for a circulating water system. The method comprises the steps of circulating water system field data acquisition, circulating water system data analysis, water quality optimization, circulating water pump group optimization, pipe network optimization and cooling tower optimization. According to the method, system energy balance field testing and calculation standards are established, water quality analysis and system energy utilization efficiency analysis and research are performed, current water quality indexes and energy utilization efficiency indexes are diagnosed through analog calculation, all units of the circulating water system are subjected to optimization control in combination with production process requirements, the water quality of the circulating water system, the temperature of a cooling terminal, the flow and process parameters are strictly controlled within a set interval, and real-time monitoring of all parameters of the circulating water system process, system energy efficiency analysis and operation optimization are performed, so that dynamic hydraulic power and thermal power of a complex pipe network are balanced, the system flow and pipe network damping are minimized, the heat exchange effect is maximized, the overall energy efficiency of the circulating water system is improved, and the comprehensive, systematic and thorough energy-saving effect is achieved.

Description

technical field [0001] The invention relates to the technical field of energy saving, in particular to a method for overall optimization and energy saving of a circulating water system. Background technique [0002] The circulating cooling water system is widely used in various fields of national economic production such as iron and steel, petroleum, chemical industry, chemical fertilizer, building materials, power generation, etc. The system uses water as the medium for cold (heat) exchange and transmission in the process, mainly relying on water pumps as the power source To promote the flow of circulating water, the system involves the whole process of circulating water pump unit, pipe network, heat exchange device, cooling tower and so on. According to national industrial statistics, the power consumption of water pumps in the circulating water system accounts for about 10% of the national power generation, and the circulating water consumption has accounted for 70% of th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for overall optimization and energy saving of the circulating water system to solve many problems of high energy consumption in the circulating water system. It is mainly based on the principles of fluid mechanics and heat exchange and the principle of economical operation of the circulating water system to establish a system On-site testing and calculation standards for energy balance, starting with circulating water quality, pump sets, pipe networks, heat exchange devices, cooling towers, etc., conduct water quality analysis and system energy utilization efficiency analysis and research, and use simulation calculations to diagnose current water quality indicators, The energy utilization efficiency index, combined with the requirements of the production process, optimizes the control of water quality, motors, pumps, valves, pipe networks, terminal heat exchange equipment, cooling towers and other units in the circulating water system, and controls the water quality of the circulating water system, the temperature of the cooling terminal, The flow and process parameters are strictly controlled within the set range, real-time monitoring of various parameters of the circulating water system process, system energy efficiency analysis and operation optimization, so as to balance the dynamic hydraulic and thermal dynamics of the complex pipe network and ensure the minimum system flow and pipe network damping. Maximize the heat exchange effect, improve the overall energy efficiency of the circulating water system, and achieve a comprehensive and systematic energy-saving effect

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