Product

Percolation Tank

Brief Introduction

Literally, a percolation tank is a device for percolating liquid, where the liquid continuously infiltrates out. It is a commonly used infiltration, extraction, and separation equipment in the pharmaceutical, food, and chemical industries. Percolation tanks are especially most frequently used for the infiltration, extraction, and separation of effective components from Chinese herbal medicines. Percolation is a static extraction and separation method. Generally, percolation tanks adopt normal – temperature percolation, and sufficient percolation is achieved through full contact.

 

Inside a percolation tank, Chinese herbal medicines are generally added into the tank. A small amount of liquid is first added for infiltration, and then an extractant liquid is added to permeate into the medicinal materials to dissolve out the effective substances. The liquid can infiltrate and flow simultaneously.

 

Commonly used percolation tanks are divided into two types: straight – tube percolation tanks and regular – cone percolation tanks. The operation methods inside common percolation tanks can be divided into single percolation, repeated percolation (multiple percolations), counter – current percolation, and pressurized percolation.

Operation Methods:

  1. Moistening: Prepare the solvent in a certain proportion, pour the solvent into the medicinal materials. The medicinal materials will fully expand after absorbing the solvent.
  2. Loading into the Tank: After the medicinal materials are moistened for a period of time, load them into the percolation tank (or a multi – function extraction tank).
  3. Infiltration: Slowly add the extraction solvent into the percolation tank until the liquid level is about 20 – 30 centimeters higher than the medicinal materials. Close the liquid inlet and the feeding port and let it infiltrate for 24 – 48 hours.
  4. Percolation: After a certain period of time, discharge the percolation liquid, and then add the extraction solvent again. Repeat the percolation for multiple times.

Factors Affecting Percolation Quality:

  1. Appropriate Particle Size: If the particles are too coarse, the extraction will be insufficient and full percolation cannot be achieved. If they are too fine, the slag discharge door will be blocked and the liquid will not flow out smoothly. Generally, coarse powder (5 – 20 meshes) is used.
  2. Moistening of Solid Materials: Premoistening has an impact on the yield of percolation; insufficient leaching may occur if not done properly.
  3. The pressure for compacting the medicinal powder should be uniform.
  4. Control the Percolation Speed: If it is too fast, the extraction will be insufficient; if it is too slow, the efficiency will be affected.

Structural Features

Our company specializes in producing stainless steel percolation tanks, which are offered at favorable prices, clean and hygienic, and have an attractive appearance. To ensure sufficient solvent infiltration and extraction of medicinal materials, generally, percolation tanks adopt a large length – to – diameter ratio, usually choosing 2 – 4. For medicinal materials with good solubility, regular – cone percolation tanks are generally used, because the cone – shaped part can make the compacted medicinal materials looser to some extent and has contraction space. Percolation tanks are generally operated under normal temperature and pressure, so they are usually single – layered. They can also be designed for heating or cooling according to the process design. The slag discharge door can be a manually quick – opening type or a convenient and fast cylinder – locking type slag discharge door. Straight – tube percolation tanks are generally used for materials that are relatively easy to percolate. The percolation tank is made of high – quality stainless steel, with a feeding port, a liquid inlet, a slag discharge door, a cleaning port, a sewage discharge port, etc. It is suitable for single infiltration and extraction or multiple infiltrations and extractions, with simple operation and sufficient percolation. Welcome to place an order.

Parameter Selection Table

Specification SL – 0.5 SL – 1.0 SL – 2.0 SL – 3.0 SL – 4.0 SL – 6.0 SL – 8.0 SL – 10
Effective Volume 500L 1000L 2000L 3000L 4000L 6000L 8000L 10000L
Designed Pressure Inside the Tank Normal Pressure
Compressed Air Pressure 0.6 – 0.7Mpa
Diameter of Feeding Port (mm) 400 400 500 500
Diameter of Slag Discharge Door (mm) 600 800 800 1000 1000 1200 1400 1500

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