Mechanical continuous extraction process for stevioside and continuous extraction unit

A technology of stevioside and extraction process, which is applied in the field of extraction of sweet ingredients of stevia, can solve the problems of low production efficiency, long assembly line, large floor space and the like

Inactive Publication Date: 2011-11-02
张付舜 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the cold immersion and hot immersion processes of horizontal tank and vertical tank all have common defect: (1) water consumption is big, and blowdown is big: the solid-liquid ratio of general tank type immersion is all in 1: 12 to 1: 22. Large water consumption; (2) Energy consumption: due to the large amount of material to be processed, the energy consumption is also large; (3) Low efficiency: Generally speaking, a soaking cycle takes more than 2 hours, and multiple leaching

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  • Mechanical continuous extraction process for stevioside and continuous extraction unit
  • Mechanical continuous extraction process for stevioside and continuous extraction unit
  • Mechanical continuous extraction process for stevioside and continuous extraction unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Such as figure 1 A mechanical continuous extraction process for steviosides shown, comprising the following steps:

[0111] Step 1. Soaking with saturated liquid absorption: Soak the stevia leaves to be treated in a soaking tank or a soaking tank, and make the stevia leaves reach a state of saturated liquid absorption.

[0112] When actually soaking in saturated liquid absorption, the temperature of the water used is room temperature or 40°C to 80°C. That is to say, when soaking in practice, it can be soaked in hot water at 40°C to 80°C (hot water supply equipment is required at this time), or it can be soaked in cold soaking (operated at room temperature). In this embodiment, hot water at a temperature of 60° C. is used for soaking. When actually soaking with saturated liquid absorption, the temperature of the hot water used can be adjusted within the range of 40° C. to 80° C. according to actual specific needs. At the same time, before using the soaking tank to soak...

Embodiment 2

[0164] In this example, the mechanical continuous extraction process of stevioside used is different from that in Example 1 in that: after the residual material obtained in step 204 is discharged through the discharge port 7, it is necessary to use material conveying equipment to remove the residual material The material is sent to the feed port 3 of the continuous extraction unit, and the residual material is repeatedly treated according to the treatment methods described in steps 201 to 204. Moreover, the methods and steps for repeatedly processing the residual materials according to the processing methods described in steps 201 to 204 are the same as the connection extraction methods and steps described in step 2 of embodiment 1.

[0165] Therefore, in the actual extraction process, before feeding, it is determined according to the specific conditions whether to repeat the continuous extraction process for the stevia leaves to be treated. According to the extraction process...

Embodiment 3

[0174] In this example, the mechanical continuous extraction process of stevioside used is different from that in Example 1 in that: after the residual material obtained in step 204 is discharged through the discharge port 7, it is necessary to use material conveying equipment to remove the residual material The material is sent to the feed port 3 of the next continuous extraction unit, and the residual material is repeatedly treated according to the treatment method described in steps 201 to 204.

[0175] In the actual extraction process, before feeding, it is determined according to the specific situation whether to repeat the continuous extraction process of the stevia leaves to be treated. In the extraction process, the residual material discharged through the discharge port 7 is sent to the feed port 3 of the next continuous extraction unit to repeat the continuous extraction process.

[0176] In the actual use process, the number of times of repeated continuous extractio...

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Abstract

The invention discloses a mechanical continuous extraction process for stevioside and a continuous extraction unit. The continuous extraction process comprises the following steps of: 1, saturated imbibition immersion; 2, carrying out mechanical continuous extraction by adopting the continuous extraction unit; 3, post-recycling treatment; and 4, follow-up treatment. The continuous extraction unitcomprises a shell, a high-voltage kneading and tearing device and a low-voltage expanding imbibition device which are arranged inside the shell; both the high-voltage kneading and tearing device and the low-voltage expanding imbibition device comprise horizontal thrusters; the horizontal thrusters are of twin-screw extruders and comprise propelling main shafts and propelling countershafts which are synchronous in the rotation and opposite in the rotation direction; and helical blades, which are opposite in the helical direction, are arranged on the propelling main shafts and the propelling countershafts. The process and the continuous extraction unit have the advantages of reasonable design, convenience for implementation, energy saving, environment friendliness, little water consumption,high production efficiency, high extraction efficiency and capability of effectively solving the practical problems, such as larger water consumption, great waste water handling capacity, high investment cost, low production efficiency, low extraction rate and the like when the traditional pot-type steeping tank is used for extraction.

Description

technical field [0001] The invention belongs to the technical field of extraction of sweet components of stevia rebaudiana, and in particular relates to a mechanical continuous extraction process of stevioside and a continuous extraction unit. Background technique [0002] my country's stevia production accounts for more than 85% of the world's share, but the initial process of stevia production is also the key process of soaking and extracting stevia leaves, which has been using traditional extraction tank equipment. Although there are also optimized so-called three-stage countercurrent extraction processes for the tank extraction process, ultrasonic or microwave-assisted enhancement, but after all, it has not jumped out of the traditional process category of long cycle, low efficiency, large solid-liquid ratio, and large amount of wastewater polluting the environment. [0003] The extraction of the sweetness components of stevia is mainly the extraction of stevia, the puri...

Claims

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Application Information

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IPC IPC(8): C07H15/256C07H1/08B01D11/02
Inventor 张付舜孙砺博李新圃郭玉孝张虎明张敏
Owner 张付舜
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