Rotary Pumps in chemical engineering

Alexia Ramirez
Mind Map by Alexia Ramirez, updated more than 1 year ago
Alexia Ramirez
Created by Alexia Ramirez over 6 years ago
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Mapa Mental

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Rotary Pumps in chemical engineering
  1. They can accommodate thin to high viscosity liquids, high vacuums to high pressures, and minute doses to high capacities. The following are the principle rotary pumps:
    1. Internal Gear Pumps
        1. 1. Liquid enters the suction port between the rotor and idler teeth.
          1. 2. Liquid travels through the pump between the teeth of the "gear-within-a-gear" principle. The crescent shape divides the liquid and acts as a seal between the suction and discharge ports.
            1. 3. The pump head is now nearly flooded, just prior to forcing the liquid out of the discharge port.
              1. 4. Rotor and idler teeth mesh completely to form a seal equidistant from the discharge and suction ports. This seal forces the liquid out of the discharge port.
              2. Applications
                1. All varieties of fuel oil and lube oil
                  1. Resins and Polymers
                    1. Alcohols and solvents
                      1. Asphalt, Bitumen, and Tar
                        1. Polyurethane foam (Isocyanate and polyol)
                      2. External Gear Pumps
                          1. 1. As the gears come out of mesh, they create expanding volume on the inlet side of the pump. Liquid flows into the cavity and is trapped by the gear teeth as they rotate.
                            1. 2. Liquid travels around the interior of the casing in the pockets between the teeth and the casing -- it does not pass between the gears.
                              1. 3. Finally, the meshing of the gears forces liquid through the outlet port under pressure.
                              2. Applications
                                1. Various fuel oils and lube oils
                                  1. Chemical additive and polymer metering
                                    1. Chemical mixing and blending (double pump)
                                      1. Acids and caustic
                                    2. Lobe Pumps
                                        1. 1. As the lobes come out of mesh, they create expanding volume on the inlet side of the pump. Liquid flows into the cavity and is trapped by the lobes as they rotate.
                                          1. 2. Liquid travels around the interior of the casing in the pockets between the lobes and the casing -- it does not pass between the lobes.
                                            1. 3. Finally, the meshing of the lobes forces liquid through the outlet port under pressure.
                                            2. Applications
                                              1. Polymers
                                                1. Paper coatings
                                                  1. Soaps and surfactants
                                                    1. Paints and dyes
                                                  2. Gerotor Pumps
                                                      1. 1. Liquid enters the suction port between the rotor and idler teeth.
                                                        1. 2. Liquid travels through the pump between the teeth of the "gear-within-a-gear" principle. The close tolerance between the gears acts as a seal between the suction and discharge ports.
                                                          1. 3. Rotor and idler teeth mesh completely to form a seal equidistant from the discharge and suction ports. This seal forces the liquid out of the discharge port.
                                                          2. Applications
                                                            1. Light fuel oils
                                                              1. Lube oil
                                                                1. Cooking oils
                                                                  1. Hydraulic fluid
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