Selection Procedure and Method of Deep Well Submersible Pump

Deep well submersible pump selection is an important part of the pumping station project planning, should be synchronized with the irrigation (platoon) area. The choice of pump type is based on the pump station flow rate, head and its variation rule determined by the division of irrigation (platoon) area. In the actual project planning, is to determine the irrigation and drainage design standards and engineering control on the basis of the development of irrigation (platoon) area of ​​the feasibility of the program and the overall layout of the project. Determine the pump station flow, head and its variation. And then select the pump, supporting the power machine and auxiliary equipment, calculate the economic indicators of the program, the technical and economic feasibility studies, evaluation of its effectiveness, choose the best option. Here only a brief introduction to the pump station flow, head and its changing laws are known under the premise of deep well submersible pump selection of the steps and methods.
   
    (1) According to the characteristics of the pump head, from the pump integrated spectrum (or pump performance table) to select several different flow pumps. A single pump flow rate for different pump types is denoted by Q.
    (2) According to the pump design flow and single pump flow Qi, to determine the pump number of different pump type ni, and to meet the following requirements.
                                                                 Q Let ≈ Σ niQi
Where Q is the pump design flow (m3 / s).
      Qi - Single pump flow rate for the selected pump type. Pump flow (m3 / s) with design head or average head corresponding to pump station;
      Ni corresponds to Q; pump type pump number.
And in the pump design process flow line fitting to check whether the requirements to meet the irrigation and drainage flow changes; check whether you are close to an integer number of pump stations and pump stations meet the requirements; in the process of fitting and design
When the lines are close together, within the allowable range of irrigation (or drainage), modify the design flow process line so that
The two coincide.
    (3) According to the primary pump type and the number of units, configure the pipeline and accessories and draw the pipeline characteristic curve, find the pump operating point to determine the pump installation elevation.
    (4) matching power machine and auxiliary equipment, to develop the pump structure and layout of the way.
    (5) According to the characteristics of the different types of pumps selected, the equipment cost, construction investment, operation and management fee, etc. are calculated, analyzed and compared.
    (6) According to the deep well submersible pump selection principle, according to technical and economic conditions, determine the pump type and number.