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Low-temperature Thermal Reflux Extraction and Concentration Unit

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Overview

低温热回流提取浓缩装置，顾名思义，是在低温条件下进行提取和浓缩。整个过程需要低温，因为某些材料对热敏感——高温会导致材料变性，这不利于提取并导致提取不完全。低温是通过真空条件实现的，这降低了材料的沸点，使药液在较低的沸点下沸腾并提取。浓缩也在真空下进行，以确保材料的性质不受损坏。通常，低温热回流包括在常压下提取和在低温下浓缩。

 

The low-temperature thermal reflux unit is mainly composed of an extraction tank, a single-effect external circulation concentration unit, and other auxiliary equipment. It integrates extraction, concentration, and solvent recovery, suitable for extraction and concentration processes of traditional Chinese medicinal materials, herbal medicines, animal viscera, food additives, etc. It changes the traditional process of extracting first and then concentrating, enabling simultaneous extraction and concentration.

Working Principle

准备好的处方药材放入提取罐中，一次性加入5-10倍量的溶剂（溶剂的性质和数量应符合工艺要求）。浸泡一段时间后，打开蒸汽阀加热，一般通过夹套加热（水提取和芳香油提取才用直接蒸汽加热）。煎煮设定时间后，高温提取液可通过提取罐底部的粗滤器连续过滤，然后通过过滤进入浓缩器。浓缩时，产生的蒸汽进入冷凝器冷凝成冷凝液，再喷入提取罐作为新溶剂；提取罐中产生的二次蒸汽在冷凝器中被冷凝成冷凝液并回流到提取罐。溶剂产生的所有蒸汽通过热交换转化为冷凝液并返回到提取罐。二次蒸汽在过程中被充分利用，形成新的溶剂大回流提取，因此药材中的溶质和溶剂始终保持高梯度质量传递和高速溶解。因此，这套设备在节能和保持溶剂平衡方面具有极高的优势。因此，这种设备在节能和保持溶剂平衡方面具有极大的优势。因此，这种设备在节能和保持溶剂平衡方面具有极大的优势。

 

The new solvent dissolves the soluble substances in the medicinal materials from top to bottom through the medicinal material layer to the bottom of the extraction tank, and is then pumped into the concentrator. The above process is repeated, forming a large circulation of solvent extraction-concentration (recovery). After multiple cycles, the extraction liquid becomes colorless, at which point the extraction liquid stops being pumped into the concentrator. The concentrator continues to concentrate until the liquid extract with the required specific gravity (1.1-1.25) is obtained, which is then discharged for standby.

Performance Characteristics

  1. 高效提取和浓缩：由于溶质的高速溶解，提取时间短，并且浓缩与提取同时进行。因此，从药材到浓缩软膏仅需7-8小时，确保了设备的高利用率。
  2. 显著节能：浓缩过程的二次蒸汽作为提取的热源，泵入浓缩器的提取液与浓缩过程保持相同温度。这节省了超过50%的蒸汽，并最大限度地减少了热损失。
  3. Low solvent consumption and cost: The solvent input is reduced, as the medicinal materials in the extraction tank only require a single solvent addition, which circulates within a sealed system. Almost all solvent in the dregs and liquid can be recovered (loss rate <5%), leading to low solvent consumption, reduced production costs, and substantial cost savings.
  4. Higher ointment and active ingredient yield: The ointment yield increases by 10%-15% compared to traditional processes, and the content of effective components doubles. The single-time solvent injection enables large reflux circulation, maintaining a high concentration gradient between solutes in medicinal materials and the solvent, thus accelerating solute dissolution. This significantly improves both ointment and active ingredient recovery rates, laying a solid foundation for qualitative and quantitative drug identification.
  5. 多功能且紧凑的设计：该装置支持单独提取、单独浓缩或同时提取-浓缩。其特点是结构紧凑、操作简单（单人可操作）、占地面积小、减少了对中间储罐的需求以及低投资成本。
  6. GMP合规生产：整个设备采用进口SUS304不锈钢制成，全密封管道生产。这不仅减少了环境污染，还消除了重金属和细菌的渗透，完全符合GMP要求。

Technical Parameters

模型
物品		 DWTQNS-0.5 DWTQNS-2 DWTQNS-3 DWTQNS-6
萃取槽/外部循环蒸发器 萃取槽/外部循环蒸发器 萃取槽/外部循环蒸发器 萃取槽/外部循环蒸发器 萃取槽/外部循环蒸发器
罐体工作压力（兆帕） < 0.1 < 0.1 < 0.1 < 0.1
夹套工作压力（兆帕） < 0.25 < 0.25 < 0.25 < 0.25
气缸工作压力（兆帕） 0.6 – 0.7 0.6 – 0.7 0.6 – 0.7 0.6 – 0.7
进料口直径（毫米） 400 400 400 450
加热面积 (㎡) 6 10 12 三十
冷凝器面积 (㎡) 10 20 三十 60
冷却区面积 (㎡) 0.5 1 1 1.5
体积 (立方米) 0.5 2 3 6
蒸发能力 (千克/小时) 三百 700 1000 2000

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