Novel injection concept: Line Bleeding Injection Pump (LBIP)

摘要

Injection pumps are essential for water processes and water treatment. The main task of such pumps is to inject certain dose of chemicals in water streams. Diaphragm pump with electromagnetic core is the common pump type used. This type has many problems concerning its continuous needs of maintenance due to diaphragm changing and electromagnetic core corruption. The main target of the present work is to develop a novel design of injection pump that is more efficient and has less electrical and mechanical parts. The idea is to utilize the pressure inside the line and intensify it to produce pressure which is higher than the line pressure in order to inject chemicals in the same line. To satisfy such concept a certain amount of line water should be bleed out. The amount of bleed water should be more than the amount of chemical injected by a certain percentage. The amount of bleed water could be either recycled to the line itself by using a small centrifugal pump or drained out. The new injection pump is designed with simple variable displacement facility that covers a wide range of injection doses (10-500 Liters per day) and capable of injecting any line regardless of how high pressure it is. The novel injection concept provides a strong and new facility for injection pumps used for water production market. The new concept using simple design and normal materials can reduce the cost to very competitive price compared to other injection pump types. The new design requires no driving power except for the line pressure itself. This could be promising for renewable seawater desalination researches and plants in remote areas.