To solve the problem of non-uniform fouling removal and scale prevention in the heat exchanger tube with vibrating spiral-insert cleaning technology

a vibrating and reciprocating spiral-insert cleaning mechanism is put forward.It makes use of the hydrodynamic force to change the local flow resistance at the tube outlet periodically to cause velocity fluctuation in the tube

so that the vibratory spiral-insert in the tube scratches the fouling with axial reciprocating movement and the fouling on the inside wall can be removed uniformly.The flow characteristic of the baffle is obtained by experimental study.The computation formula for velocity in the tube with the effect of baffle and the computation method for the baffle opening

which makes the vibration spiral-insert produce an axial reciprocating stroke not less than a pitch

are obtained by theoretical analysis.The test proves that the fouling removal and prevention with the vibrating and reciprocating spiral-insert is more effective.Under the same experimental conditions

the heat transfer coefficient is increased by 60% and 20%

respectively

compared to empty tube and vibration spiral.Moreover

the scaling speed is reduced.