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What is the working principle of TQZ type straight tube extraction tank
source：English website Release time：2026-01-08
The TQZ type straight tube extraction tank is an extraction equipment designed based on the principles of solid-liquid extraction, heat exchange, and dynamic circulation. The core process is "raw material infiltration heating extraction effective ingredient dissolution solid-liquid separation" to achieve efficient extraction of effective ingredients in materials. It is suitable for various processes such as water decoction, alcohol extraction, hot reflux, and aromatic oil extraction. The specific working process is as follows:
1. Feeding and infiltration
Load the pre treated solid raw materials (such as traditional Chinese medicine decoction pieces, plant materials, chemical materials) into the extraction tank, and add solvents such as water and ethanol according to the process requirements to completely immerse the raw materials. By using an internal mixing device (equipped on some models) or static soaking, the solvent can fully penetrate the raw material tissue, laying the foundation for the subsequent dissolution of effective ingredients.
2. Heating extraction
Steam (or thermal oil) is introduced into the interlayer of the extraction tank for heating, raising the temperature of the solvent inside the tank to the process set value (usually boiling at normal pressure, and micro pressure process can increase the temperature to accelerate extraction). By utilizing high temperature, the structure of the raw material cells is disrupted, and the active ingredients gradually dissolve into the solvent.
If the hot reflux process is used, the solvent vapor generated in the tank will be condensed by the top condenser and then reflux back to the tank to come into contact with the raw materials, forming a cyclic extraction process and greatly improving the extraction rate of effective ingredients; If aromatic oil components are extracted, the volatile aroma components carried by steam will be separated and collected by a condenser.
3. Dynamic reinforcement extraction (optional)
Some TQZ type extraction tanks are equipped with a forced circulation system, which extracts the solvent from the bottom of the tank through a pump body and sprays it onto the surface of the raw material from the top of the tank, forming a top-down solvent circulation. This dynamic spraying method can continuously update the solvent concentration on the surface of the raw material, reduce the resistance of concentration difference, and accelerate the dissolution rate of effective ingredients, which is more efficient than static extraction.
4. Solid liquid separation and slag discharge
After the extraction is completed, preliminary solid-liquid separation is carried out through the filter or sieve plate at the bottom of the tank, and the extraction solution (solvent containing active ingredients) is transported to the subsequent concentration and refining process. After the extraction liquid is completely discharged, open the quick opening slag discharge door at the bottom of the tank, and use gravity or auxiliary discharge device to discharge the extracted drug residue (or solid residue) out of the tank, completing one extraction cycle.
5. Solvent recovery (adapted to organic solvent processes)
If organic solvents such as ethanol are used for extraction, the solvent vapor evaporated during the heating process can be condensed and liquefied through the condensation recovery system on the top of the tank, achieving the recovery and reuse of the solvent, reducing production costs, and reducing environmental emissions.
In addition, the equipment can also adapt to the extraction requirements of different materials by controlling parameters such as heating temperature, extraction time, and cycle frequency according to process requirements. The parts in contact with the materials inside the tank are mostly made of stainless steel, which meets GMP standards, is easy to clean, and has no residue.
1. Feeding and infiltration
Load the pre treated solid raw materials (such as traditional Chinese medicine decoction pieces, plant materials, chemical materials) into the extraction tank, and add solvents such as water and ethanol according to the process requirements to completely immerse the raw materials. By using an internal mixing device (equipped on some models) or static soaking, the solvent can fully penetrate the raw material tissue, laying the foundation for the subsequent dissolution of effective ingredients.
2. Heating extraction
Steam (or thermal oil) is introduced into the interlayer of the extraction tank for heating, raising the temperature of the solvent inside the tank to the process set value (usually boiling at normal pressure, and micro pressure process can increase the temperature to accelerate extraction). By utilizing high temperature, the structure of the raw material cells is disrupted, and the active ingredients gradually dissolve into the solvent.
If the hot reflux process is used, the solvent vapor generated in the tank will be condensed by the top condenser and then reflux back to the tank to come into contact with the raw materials, forming a cyclic extraction process and greatly improving the extraction rate of effective ingredients; If aromatic oil components are extracted, the volatile aroma components carried by steam will be separated and collected by a condenser.
3. Dynamic reinforcement extraction (optional)
Some TQZ type extraction tanks are equipped with a forced circulation system, which extracts the solvent from the bottom of the tank through a pump body and sprays it onto the surface of the raw material from the top of the tank, forming a top-down solvent circulation. This dynamic spraying method can continuously update the solvent concentration on the surface of the raw material, reduce the resistance of concentration difference, and accelerate the dissolution rate of effective ingredients, which is more efficient than static extraction.
4. Solid liquid separation and slag discharge
After the extraction is completed, preliminary solid-liquid separation is carried out through the filter or sieve plate at the bottom of the tank, and the extraction solution (solvent containing active ingredients) is transported to the subsequent concentration and refining process. After the extraction liquid is completely discharged, open the quick opening slag discharge door at the bottom of the tank, and use gravity or auxiliary discharge device to discharge the extracted drug residue (or solid residue) out of the tank, completing one extraction cycle.
5. Solvent recovery (adapted to organic solvent processes)
If organic solvents such as ethanol are used for extraction, the solvent vapor evaporated during the heating process can be condensed and liquefied through the condensation recovery system on the top of the tank, achieving the recovery and reuse of the solvent, reducing production costs, and reducing environmental emissions.
In addition, the equipment can also adapt to the extraction requirements of different materials by controlling parameters such as heating temperature, extraction time, and cycle frequency according to process requirements. The parts in contact with the materials inside the tank are mostly made of stainless steel, which meets GMP standards, is easy to clean, and has no residue.
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