Should PAM be added before or after the pump?
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I would like to ask everyone: for diaphragm filter press systems used to treat chemical sludge from softening systems, where the feed pump is a screw pump, it is possible to add PAM directly to the sludge pipeline. The PAM dosing pump is also a screw pump. What I want to do is to connect a PAM dosing pipe to the suction pipeline of the sludge feed screw pump; this is the conventional method of adding chemicals before the pump. However, the supervisor suggested installing a PAM dosing pipe on the discharge pipeline of the sludge feed screw pump, citing the aim of reducing the likelihood of blockages in the pump chamber. Which of these two methods is better? Thank you~
A PAM dosing pipe is connected to the discharge pipeline of the sludge feed screw pump; the reason given is to reduce the likelihood of blockage in the pump chamber of the sludge screw pump. The management must be experienced, right?
Adding it before the pump improves the mixing effect, but it also increases the risk of clogging. In a previous project, using a relatively high concentration of antifoam agent before the pump almost caused the pump to get clogged
If a diaphragm pump is used as the feed pump, there is no need to consider this issue; adding chemicals before the pump’s inlet pipeline can also serve to improve mixing and agitation.
Added after the pump; PAM causes the destabilized colloidal flocs to grow larger and become more loose. The flocs formed by pre-pump dosing are broken apart by the impeller