Energy saving method for cooling water circulation system

Abstract

The invention discloses an energy-saving method for a cooling water circulation system. The energy-saving method comprises the following steps of: 10, acquiring configuration parameters of equipment related to the water circulation system and testing actual operating parameters of the equipment; 20, analyzing whether the current water supply capacity is reasonable according to test data, and optimizing and transforming parts of the system which have abnormal local resistance, water power unbalance, poor heat exchange effect of a heat exchanger, invalid flow of the equipment and unreasonable water supply pump matching; 30, preliminarily determining a multiple water supply pump operating mode; and 40, comparing with the multiple water supply pump operating mode determined in the step 30, and selecting a matching mode with the lowest energy consumption. By the method, system optimization is carried out according to actual production conditions of the system, a correct and economic operating mode can be provided through a form or a man-machine interface under the specific working conditions by using programs made in advance or the calculation process and results, common equipment managers can operate the method easily to fulfill the aims of saving energy and reducing consumption, and the use safety of the equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of cooling circulating water delivery systems, and relates to an energy-saving method for cooling circulating water systems. Background technique [0002] As an important supporting system, the cooling circulating water system is used in various fields of national economic production including iron and steel, petrochemical, thermal power, etc. At present, it is basically in extensive operation, and its energy waste is very serious. At present, the operation of the circulating water system lacks an intuitive, convenient, and easy-to-operate method. The inability to judge the operating efficiency of the water pump in time, and the inability to adjust the working conditions of the water pump in a timely and accurate manner will lead to serious energy waste. [0003] In the prior art, there are already several ways to realize how to re-select the water pump for the system, but there are still the following disad...

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Problems solved by technology

[0004] 1. Simply correct the existing flow rate to the rated flow rate. If the existing flow rate is greater than the rated flow rate, but the system has serious hydraulic imbalance and multiple heat exchange bottlenecks, correcting the rated flow rate will often expose the heat exchange bottleneck, affecting normal use of the system;

[0005] 2. Simply improve the operation efficiency of the water pump, and the water supply capacity reaches the current water supply capacity. Although this method does not affect the current cooling effect, the power saving effect of this technology still has more room for excavation, and it does not belong to the most advanced energy-saving technology;

[0006] 3. It simply solves the valve resistance loss, local backflow loss, and pipeline blockage caused by the equipment itself through maintenance, cleaning, replacement, etc., but the treatment has certain limitations and does not belong to the most advanced energy-saving technology;

[0007] 4. Adjust the flow rate based solely on the judgment of the overall supply and return water temperature (theoretically, under a certain system capacity, over-flow operation will lead to a small temperature difference), which can only achieve the purpose of energy saving in a system with excellent hydraulic balance. However, if the hydraulic distribution of the system is unbalanced, or the heat cannot be brought out due to serious fouling of the heat exchanger, it will lead to the phenomenon that the reduced flow will often expose the use effect of areas with poor hydraulic conditions or poor heat exchange conditions, which will affect Production proceeds normally;

[0008] 5. After the equipment is replaced, it is only a simple equipment replacement, and there is a phenomenon that the optimization potential of the pump station operation mode has not been realized, and the energy saving is not complete

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