The main factors that affect injection performance of self-priming Venturi scrubber were analyzed based on the Bernoulli equation

the influence of these factors was further verified by experiment. Injection flow rate of self-priming Venturi scrubber depended mainly on static pressure differential

cross-sectional area

height difference and liquid channel resistance coefficient on both sides of suction port. In the case of no injection

the static pressure at outlet cross section of liquid flow was equal to the pressure at nozzle wall

higher than the average pressure and center pressure at nozzle exit. In the case of injecting liquid

an additional pressure increment was generated at gas-liquid interface because of momentum exchange. Pressure increment would spread around in the form of pressure waves to the entire cross-section

resulting in further reduction of effective pressure difference for injection. When effective injection pressure difference was limited

liquid channel area and resistance coefficient became important for injection flow. On this occasion

it was more effective to enlarge the area ratio between nozzle and sleeve and enlarge nozzle diameter

to increase liquid channel area and reduce resistance coefficient

which was effective in increasing liquid flow.