This ppt is based on AIRLIFT PUMP . i hope this will help you about the same topic. Introduction, Types, Functions, pros and cons

1. AIR LIFT PUMP
Submitted By:
Anurag Ratan Shakya
Roll no. : 1700850
B.TECH (Mechanical)
Submitted To:
Prof. ANURAG GUPTA

2. Content:
 Introduction
 Types
 Function
 Construction
 Working
 Application
 Pros & Cons

3. Introduction
 An airlift pump is a pump that has low suction and moderate discharge of liquid and
entrained solids.
 The pump injects compressed air at the bottom of the discharge pipe which is
immersed in the liquid.
 The compressed air mixes with the liquid causing the air-water mixture to be less dense
than the rest of the liquid around it and therefore is displaced upwards through the
discharge pipe by the surrounding liquid of higher density

4. Types of Airlift Pump:
Motor Pump Hand Pump

5. Motor Pump Hand Pump

6. Function
 Its main function is to lift water from a deep well or sump by using compressed air.
 By buoyancy the air, which has a lower density than the liquid, rises quickly.
 By fluid pressure, the liquid is taken in the ascendant air flow and moves in the same
direction as the air

7. Construction
 The main components are :
1. Air compressor to supply compress air
2. Air pipe fitted with one or more nozzles
3. Delivery pipe
 The lower portion of delivery pipe dips into well and water gets
discharge from the upper end of the delivery pipe.

8. Working
 The compressed air from compressor is bottom end of delivery pipe through air
pipeline as a fine spray.
 Then, air gradually mix with water in delivery pipe, so from that
inside the delivery pipe density of air - water mixture decease.
 As soon as pressure in delivery pipe of height H becomes less than the pressure
due to the height of water column h in outlet of the delivery pipe.
 As per this reason rising begins in the delivery pipe above the level of water
outside the delivery pipe.
 And other reason that the water in delivery pipe lighter than outside of the
delivery pipe.

10. Figure of Air Lift Pump

11. Advantages
 The air lift pump is not having any moving parts below water level and hence there
are no chances of suspended solid particles damaging the pump.
 This pump can raise water through a bore hole of given diameter than any other
pump.
 This pump is very suitable where decompressed air is available.

12. Disadvantages
 Cost: while in some specific case the operational cost can be interesting, most
of the time, the quantity of air to compress is high compared to the liquid flow
required.
 Conventional airlift pumps have a flow rate that is very limited. The pump is
either on or off.
 It is very difficult to get a wide range of proportional flow control by varying the
volume of compressed air.
 This is a dramatic disadvantage in some parts of a small wastewater
treatment plant, such as the aerator.
 The suction is limited.

13. Applications
 Airlift pumps are often used in deep dirty wells where sand would quickly abrade mechanical
parts.
 Airlifts are used to collect fauna samples from sediment.
 It is also sometimes used in part of the process on a wastewater treatment plant if a small head
is required (typically around 1 foot head).