Industrial Plant Solutions
PRO MAKINA · Dissolution Tank
Overview
A dissolution tank is a process tank in which solid raw materials that are soluble in water or another solvent are dissolved in a controlled way to prepare a solution at the target concentration. It is used for liquid fertilizer preparation, chemical solution preparation and pre-mixing steps before formulation.
How much of a raw material dissolves, and how fast, depends on its solubility, solvent temperature, particle size and agitation intensity. The target concentration must be below the solubility limit at the operating temperature; otherwise undissolved solids remain in the tank or crystallization can occur as the solution cools.
A conical bottom, bottom drain or downstream filtration can be planned for undissolved solids, impurities and sediment. Some raw materials release or absorb heat on dissolving; in that case the need for heating or cooling is assessed separately.
01Process Flow
The diagram shows the general flow in which solvent and solid raw material are fed to the tank, dissolved under agitation, the solution is checked and transferred to the next process. Feed order and quantities follow the recipe.
Scroll horizontally to view the full diagram.
Liquid and solid feed: Solvent is charged first; solids are added in a controlled way from bags, big bags or a screw.
Dissolution under agitation: The agitator keeps solids suspended, increasing contact with the liquid and speeding up dissolution.
Solution check: Temperature and level are monitored; samples are taken for density or pH if required.
Product transfer: The finished solution is pumped to a filter, storage tank or the next process step.
Heating or cooling: If solubility or heat of dissolution requires it, a medium is supplied to the jacket or coil.
Medium return: The medium returns to the plant utility circuit.
Dissolution time depends on raw material, particle size, temperature and agitation; no time or concentration guarantee is given on this page.
02Applications
01Preparing liquid fertilizer or recipe solutions from water-soluble fertilizer raw materials such as potassium nitrate. Target concentration is set by the solubility at operating temperature.
Fertilizer and Granulation Plants
02Preparing process solutions by dissolving chemicals such as sodium hydroxide in water. For raw materials that release heat on dissolving, the solution can be brought to a safe temperature in a cooling tank before use.
Cooling Tank03Design & Manufacturing
PRO MAKINA engineers dissolution tanks around the raw material and solvent, target concentration, batch size and the chemical properties of the raw material. Solid feed arrangement, agitator, shell material, sediment handling and connections are designed together.
Raw Material and Solvent
Type and particle size of the solid raw material, and the solvent.
Concentration and Temperature
Target concentration, solubility data and operating temperature.
Volume and Feeding
Batch size, solid and liquid feeding method.
Agitation
Agitator type, speed and circulation if needed.
Material, Discharge and Instruments
Corrosion compatibility, sediment handling, level and temperature measurement.
Tank volume, agitator speed and dissolution time are defined from raw material and recipe data; no generic values are stated on this page.
04FAQ
It is used to dissolve solid raw materials that are soluble in water or another solvent under agitation, preparing a solution at the target concentration.
No. Only raw materials soluble in the chosen solvent dissolve, and the amount that can dissolve is limited by the temperature-dependent solubility.
In dissolution the solid dissolves completely in the liquid. In a suspension the solid stays undissolved and is kept suspended; an agitated reactor is assessed for that duty.
Sediment can be removed through a conical bottom and bottom drain; the solution can be filtered in the next step if required.
Raw material and solvent, target concentration, batch size, operating temperature, solid feeding method and chemical properties.
05Resources
Technical Quotation
Share your raw material, solvent and target concentration, and we will define the dissolution tank together with you.
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