JP5123718B2 - Tea husk recycling system - Google Patents

Description

  The present invention relates to a tea husk recycling system capable of obtaining a reusable green liquid or fine powder based on extraction residues such as tea husk used in tea beverages with PET bottles.

Conventionally, since the active ingredient remains in the tea husk from which tea is extracted, a deodorant using powder and deodorizing action by components such as polyphenols is used in order to reuse this (Japanese Patent Laid-Open No. 6-26948) As a neutral fat concentration-reducing agent (JP-A-6-287145) focusing on the blood pressure lowering action of the fiber of the extracted residue, and the water absorption and deodorizing properties of the dried extract residue It is known to be used as pet litter for pets (Japanese Patent Laid-Open No. 7-203793), to be used as other organic compost, and to be used as a molded product having antibacterial and deodorant properties mixed with synthetic resin. Yes.
However, the extract based on the extraction residue cannot be returned to green, and there is a problem in reusing it as a beverage.
On the other hand, in the method for producing aloe green juice disclosed in Japanese Patent Application Laid-Open No. 2002-47198, a step of slicing raw raw leaves of raw yellow aloe as a raw material into a desired width, and adding a predetermined amount of water to a predetermined amount of raw raw leaves of dried yellow aloe, The step of boiling the fresh leaves of water and water under pressure to produce a fly aroma aloe solution containing the extract of the fly algae, and the fresh leaves of boiled fly aroma aloe are taken out from the solution of the fly algae aloe, which is finely crushed and wetted A step of obtaining crushed raw leaves having the above, and a step of adding a predetermined amount of water to the pulverized raw leaves and adding a predetermined amount of water to the crushed raw leaves, and boiling them for a predetermined period of time while stirring them. A method for producing aloe green juice is disclosed.
And thereby, the aloe green juice which exhibits green is obtained by discoloring the finely crushed aloe leaves into a vivid green color.
However, the above method is applied to aloe leaves, and there still remains a problem with respect to the method of recycling using tea leaves.
In Japanese Patent No. 2872971, in a method of bringing a bleached plant into contact with a solution containing metal ions and restoring the green color of the plant by the action of metal ions, or keeping the color green, zinc ions are added to the solution containing metal ions. In addition, a method for restoring the green color of a plant or keeping it green using a solution containing iron ions is disclosed.
This is because the addition of zinc prevents the magnesium contained in the chlorophyll from being lost and browning.
However, in the above method, it is necessary to use zinc ions or iron ions in addition to metal ions, and there is a disadvantage that the configuration becomes complicated.
Japanese Patent Laid-Open No. 2000-301013 JP 2002-47198 A Japanese Patent No. 2872971

This invention was invented in view of the above circumstances, and its main problem is
It is an object of the present invention to provide a recycling system for tea husks and the like that can obtain a reusable green liquid and fine powder based on the extraction residue used in tea beverages in PET bottles.

In order to solve the above problem, the invention of claim 1
A recycling system for tea husks and the like that can obtain a reusable green extract based on the extraction residue such as tea husks used in tea beverages with PET bottles,
A stirrer for adding water to the extraction residue and stirring;
A mixer device for finely crushing the stirred residue liquid;
A pressure copper kettle for extracting the crushed liquid by convection at high temperature and high pressure;
A stepped copper concentrator for concentrating by evaporating moisture at a high temperature while flowing the high-pressure extract extracted from the pressure copper kettle in contact with the copper surface of one or more slopes;
A filtering device and / or a precipitating device for filtering the concentrate to separate it into a solid and a liquid;
It comprises a sterilizer for sterilizing the separated concentrated liquid.
In the invention of claim 2,
The stepped copper concentrators are arranged with a gap in the vertical direction, and the slopes of a plurality of upper and lower stages arranged so that the high-pressure extract can flow without interruption, with the directions of inclination being opposite to each other. And a storage part for storing the concentrated liquid flowing down the lowermost slope, a storage part for storing the high-pressure extract pumped from the pressure copper kettle, and the concentrated liquid or high-pressure extract stored in the storage part. It is characterized by comprising a pumping device that pumps water to the uppermost end of the upper slope and a heating device that maintains the high-pressure extract or concentrated water flowing on the slope at a high temperature at which the water can be evaporated.

As described above, in the present invention, based on the extraction residue used in the plastic bottled tea beverage, chlorophyll and other active ingredients remaining in the extraction residue are extracted, and the concentrated solution and fine powder restored to an excellent green color. A residue can be obtained.
The green color tone can be stored for a long period of time, and even when immersed in water, the green color hardly fades and can maintain a green color for a long time.
As a result, used tea materials such as tea husks can be zero-emission recycled, and food can be recycled as food and drink having a bright green color.
The use is not limited to food and drink, but can be added to paper, fiber, resin, etc. as a raw material for drugs and cosmetics, or as an additive having deodorant properties and antibacterial properties, and used for various purposes.

Hereinafter, embodiments of the used tea raw material recycling system of the present invention will be described below with reference to the drawings.
The recycling system 1 includes a stirring device 2, a mixer device 3, a pressure copper kettle 4, a stepped copper concentrating device 5, a filtering device 6, a precipitation device 7, and a sterilizing device 8.

[Agitator]
In the case of the present embodiment, the stirring device 2 is composed of a hopper 20 having stirring blades 21, and used tea raw material (extraction residue) used for tea beverage containing a plastic bottle is put into the hopper 20 together with water. Then, the stirring blades 21 are stirred so as to be even.
In this example, water 9 was mixed with the spent tea shell 1 as a ratio.

[Extracted residue]
The extraction residue used for the tea beverage with a PET bottle is the residue used by the normal manufacturing method.
The extraction method involves extracting tea ingredients such as tea leaves with warm water or hot water, then removing tea leaves and fine particles from the tea husk and extract by filtration, etc., and diluting the extract to a suitable concentration for drinking tea beverages. In the present invention, the extraction residue removed in the above process is used.

[Mixer device]
The mixer device 3 is a mill mixer or a homomixer in this embodiment, but a grinding device or the like may be used as the mixer device.
The mixer device 3 is connected to the discharge port of the hopper 20 of the stirring device 2 via a line L1, and the residual liquid mixed and stirred by the stirring device 2 is introduced.
As a result, the extraction residue such as the tea husk has an average particle size of 1 to 10 microns and becomes a brown crushed liquid mixed with water.

[Pressure copper pot]
The crushed liquid is pumped into the pressure copper kettle 4 by a pump through the line L2.
As shown in FIGS. 2 and 3, the pressure copper pot 4 has a copper cage 41 made of copper on the surface in contact with the crushing liquid as a storage portion filled with the crushing liquid, and a pressure having the copper basket 41 in the container. It comprises a container (pressure kettle) 40 and has a pump (not shown) that convects the crushed liquid inside the kettle at high pressure.

In the pressure copper pot 4, the crushed liquid is extracted by convection at a high pressure of about 1.2 Mpa to 4 Mpa for about 30 minutes to 60 minutes, whereby the extract turns green simultaneously.
Here, the efficiency is 1.2 Mpa to 2 Mpa.
Moreover, it is preferable to heat at 120 degreeC-130 degreeC in the case of the extraction under the said high pressure.
Thereby, it is excellent in an extraction effect and can perform green restoration | restoration of a high pressure extract quickly.

[Stair type copper concentrator]
The high-pressure extract extracted from the pressure copper pot 4 passes through the line L3 and is pumped to the stepped copper concentrator 5.
The stepped copper concentrator 5 has one or a plurality of slopes in which a copper plate is provided on the surface in contact with the high-pressure extract in the casing 50, and the high-pressure extract is caused to flow down on the slope while being brought into contact with the high-pressure extract. Evaporate the water and concentrate.

  The stepped copper concentrators 5 shown in FIGS. 2 and 3 are arranged with a gap in the vertical direction, and the high-pressure extract can continuously flow down with the directions of inclination being opposite to each other. A plurality of upper and lower slopes 51, 52, and an extract liquid flowing down the lowermost slope 52, and a storage portion 53 for storing the extract liquid pumped from the pressure copper pot 4 , A pumping device 54 for pumping the extract stored in the storage portion 53 to the uppermost end of the uppermost slope 51, and a heating device (not shown) for heating the interior of the stepped copper concentrator 5. ing.

As a result, the high-pressure extract flows down along the step-like slopes 51 and 52 while being in contact with the copper plate serving as the contact surface, and flows into the storage portion 53, and again in the step-like slopes 51 and 52 by the pumping device 54. Cycle back to.
During the circulation, the internal temperature of the heating device is maintained at a high level that allows the water to evaporate, and therefore the water is repeatedly evaporated. Therefore, the amount of water evaporated from the high-pressure extract is large, and the extract is concentrated. However, further green stabilization and restoration is performed.
In this embodiment, the temperature in the stepped copper concentrator 5 is 85 ° C. to 100 ° C., and the time during which the extract is circulated is about 50 minutes, and the water is evaporated to about half or more. However, in the present invention, the circulation time can be appropriately changed depending on the degree of concentration.

[Filtering equipment, precipitation equipment]
The concentrated liquid obtained as described above is pumped to the filtration device 6 via the line L4, and is separated into a liquid and a slight residue restored to green by solid-liquid separation.
Further, in the present embodiment, finer solid-liquid separation is performed through a line L5 and further passing through a precipitation device 7 including two precipitation tanks 7a and 7b connected in series.

The separated concentrated liquid is pressure-fed through a line L6 to a known sterilization apparatus 8 so that it can be used for eating and drinking, and is sterilized.
When the separated fine residue is also used for food, it is sterilized by the sterilizer 8 separately.

The separated concentrated liquid is restored to a deep and deep green color, and the separated fine residue (fine powder) is also green.
Those restored to green have no discoloration due to oxidation.
Therefore, the concentrated liquid restored to green is used for tea beverages or has high utility value as a tea pigment.

In addition, the fine residue can be used for mixing into food, pulp, and building materials.
The principle of the above greening is not clear, but as a result of various experiments, the active ingredient contained in the extraction residue used in tea beverages in PET bottles is not only in contact with the copper component of the copper basket, but also in steps that are repeatedly contacted. It is thought that it reacted with copper by contact with the copper component of the slope of the type copper concentrator.
The present invention is not limited to the above-described embodiment, and it is needless to say that various design changes can be made without departing from the scope of the present invention.

It is a schematic diagram which shows the whole structure of recycling systems, such as a tea husk of Example 1. FIG. It is a top view which shows a step type copper concentration apparatus typically. It is a side view which shows a step type copper concentration apparatus typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recycling system 2 Stirring device 3 Mixer device 4 Pressure copper kettle 5 Step type copper concentrator 6 Filtration device 7 Precipitation device 8 Sterilizer 51 Uppermost slope 52 Lowermost slope 53 Storage part 54 Pumping device L1-L6 line

Claims (2)

A recycling system for tea husks and the like that can obtain a reusable green extract based on the extraction residue such as tea husks used in tea beverages with PET bottles,
A stirrer for adding water to the extraction residue and stirring;
A mixer device for finely crushing the stirred residue liquid;
A pressure copper kettle for extracting the crushed liquid by convection at high temperature and high pressure;
A stepped copper concentrator for concentrating by evaporating moisture at a high temperature while flowing the high-pressure extract extracted from the pressure copper kettle in contact with the copper surface of one or more slopes;
A filtering device and / or a precipitating device for filtering the concentrate to separate it into a solid and a liquid;
A recycling system for tea husks, etc., comprising a sterilizer for sterilizing the separated concentrated liquid.   Stepped copper concentrators are arranged with a gap in the vertical direction, and the slopes of a plurality of upper and lower steps are arranged so that the high-pressure extract can flow without interruption while the directions of inclination are opposite to each other. Storing the concentrated liquid flowing down the bottom slope, storing the high-pressure extract pumped from the pressure copper kettle, and storing the concentrated liquid or high-pressure extract stored in the storage section at the top 2. A pumping device that pumps water to the uppermost end of the slope of the first and a heating device that maintains a high-pressure extract or concentrated water flowing on the slope at a high temperature at which water can be evaporated. Recycling system for tea leaves.

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