For a 60-cubic-meter storage tank, is it possible to adjust the pH by adding alkali using a pump for circulation, without the need for a mixer?

It is possible to use a pump for circulation to add alkali and adjust the pH; this method relies on the pumping action to ensure thorough mixing of the alkaline solution with the liquid in the storage tank, thereby achieving pH adjustment. The circulating flow rate of the pump depends on the capacity of the tank and the mixing efficiency required to be achieved. For a tank with a capacity of 60 cubic meters, it is generally recommended that the pump’s circulation flow rate should be at least 1-2 times the tank’s capacity, that is, 60-120 m³/h. However, this also needs to be adjusted according to the specific operating conditions and the required reaction speed. There are currently no specific guidelines tailored to this situation; it is usually necessary to determine the approach by combining the actual process requirements with the general principles of chemical mixing design. In practical operation, it is advisable to conduct relevant tests to optimize the circulation flow rate and the amount of alkali added. At the same time, it is necessary to pay attention to monitoring pH changes and uniformity to ensure effectiveness. .

It’s theoretically feasible. We use frozen saline in a circulating system to adjust the pH value; it’s best to dilute the liquid alkali a bit.

Pump circulation is completely feasible; the common method for mixing oils (petrol and diesel products) relies on pump circulation, although there are spray mixers inside the storage tanks

If the system involves switching between two storage tanks, there should be no problems; one tank is filled with alkali and a pump is used to circulate it in order to adjust the pH until it meets the required standards, after which it becomes available for use. The other tank, whose pH has already met the requirements, supplies material downstream via a pump. If the system is one that involves continuous feeding and discharging from a single tank, along with the addition of alkali to adjust the pH, where alkali is added and a pump is used for circulation to regulate the pH, and this same circulation pump also serves as the pump for delivering the material downstream, then it may be difficult to meet the high requirements for precision in pH regulation imposed by the downstream system.

The length of time required for mixing across different generations needs to be taken into account; if there is no time constraint or if the time is more than an hour, then it’s acceptable to use a water pump for mixing； It would be better to add the chemical at the water pump’s inlet ； Calculating shows that a power mixer will use less electricity.