Energy-saving reforming method for water pumps of water supply system
A technology for energy-saving transformation and water pumps, which is applied in the configuration of water supply devices, water supply pools, and buildings. It can solve the problems of uneconomical, energy-saving, waste, and low-efficiency energy, and achieve the effect of saving energy and reducing energy consumption.
Inactive Publication Date: 2014-07-09
CHANGSHA RUIZE ENERGY TECH
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Problems solved by technology
In actual operation, the efficiency of most water pumps is less than 60%, and the overall efficiency of pumping stations is less than 50%, resulting in a large energy waste
When selecting pumps, the head and flow are usually selected by point and surface, and large and small values, which not only increases the initial equipment cost, but also causes energy waste due to the long-term low-efficiency operation of the pump, which is not economical in operation. Energy saving
Method used
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[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0023] Schematic diagram of the water supply system of a chemical plant figure 1 As shown in the picture, the black in the water pump group in the figure indicates the running water pump. The original pump is two 500S59B parallel operation, one variable speed, one constant speed, constant pressure. The performance parameters of 500S59B are as follows:
[0024]
[0025] The basic situation of its operation is as follows:
[0026] The maximum flow Q of the system operation max =3800m 3 / h, minimum flow Q min =3400m 3 / h, the main pipe pressure P=0.44Mpa, the liquid level depth of the pool is 5m, and the operating points of the pump at the maximum flow and minimum flow are as follows:
[0027]
[0028] It can be seen from the above table that the water pump 500S59B deviates from the high-efficiency point due to improper selection of th...
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The invention discloses an energy-saving reforming method for water pumps of a water supply system. The method comprises the following steps of: respectively selecting a variable pump and a fixed pump according to actually tested related data of system operation on a site and the actual condition of the site; selecting the maximum variation of the flow for the variable pump, and distributing the rest flow to the fixed pump; and performing automatic frequency control to change the running states of the pumps so as to meet constant pressure water supply under different flow. By the method, the constant pressure water supply under the different flow can be met, and the water pumps can run in a high efficiency zone no matter how the flow changes, so that the efficiency of the system is prevented from being reduced by flow regulation, and the water supply system is in an efficient running state all the time under various different working conditions; and a comprehensive, systematic and thorough method is provided for energy-saving reformation of the water pumps of the constant pressure water supply system, so that the system runs efficiently and saves energy.
Description
technical field [0001] The invention relates to the field of water pump type selection, in particular to an energy-saving transformation method for a water pump in a constant pressure water supply system. Background technique [0002] According to statistics, the energy consumption in water supply projects accounts for 30-70% of the water supply cost, and the energy consumption of water pumps accounts for about 90% of the total energy consumption. In actual operation, the efficiency of water pumps is mostly less than 60%, and the overall efficiency of pumping stations is less than 50%, resulting in a large waste of energy. [0003] When using the traditional design method to build a pumping station, in order to make operation management and maintenance more convenient, the models of the selected pumps are usually the same. When selecting pumps, the head and flow are usually selected by point and surface, and large and small values, which not only increases the initial equip...
Claims
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IPC IPC(8): E03B11/16
Inventor 孙文科徐樱
Owner CHANGSHA RUIZE ENERGY TECH