Method for preparation of cold-soluble instant tea through low-temperature extraction in whole process
An instant tea, low temperature technology, applied in the direction of tea extraction, tea, food science, etc., can solve the problems of the destruction of flavor and color, the overall flavor of tea soup is not good, and achieve the effect of good solubility
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Embodiment 1
[0020] A method for preparing cold-soluble instant tea extracted at low temperature throughout the whole process, comprising the following steps:
[0021] a) After mixing dry green tea with 15 times the mass of low-temperature pure water at 0-5°C, use a colloid mill to grind it into a coarse slurry, pass the material through a 60-mesh sieve, and cool the tea slurry through cooling during the refining process device to keep the temperature of the tea slurry below 10°C;
[0022] b) Stir and extract the coarsely ground slurry for 30 minutes, and then use a decanter centrifuge to centrifuge and remove slag after the interlayer cooling water is used to control the temperature and keep it below 10°C;
[0023] c) Filtrate the centrifugate with a 50nm ultrafiltration membrane. During the filtration process, the interlayer cooling water is used to reduce the frictional heat generation during the filtration process, so that the temperature is controlled below 10°C;
[0024] d) The filt...
Embodiment 2
[0028] A method for preparing cold-soluble instant tea extracted at low temperature throughout the whole process, comprising the following steps:
[0029] a) Mix dry black tea with 15 times the mass of 5-10°C low-temperature pure water, grind it into a coarse slurry with a colloid mill, pass the material through a 60-mesh sieve, and pass the tea slurry through a cooling device during the refining process , Keep the temperature of the tea slurry below 15°C.
[0030] b) Stir and extract the coarsely ground slurry for 30 minutes, and then use a butterfly centrifuge to centrifuge and remove slag after controlling the temperature of the interlayer cooling water to keep it below 15°C.
[0031] c) Filtrate the centrifuge with a 0.5 μm ceramic membrane. During the filtration process, the interlayer cooling water is used to reduce the frictional heat generation during the filtration process, so that the temperature is controlled below 15°C.
[0032] d) Concentrate the filtrate after m...
Embodiment 3
[0036] A method for preparing cold-soluble instant tea extracted at low temperature throughout the whole process, comprising the following steps:
[0037] a) After mixing dry white tea with 20 times the mass of low-temperature pure water at 0-5°C, use a colloid mill to grind it into a coarse slurry, pass the material through a 60-mesh sieve, and cool the tea slurry through cooling during the refining process device to keep the temperature of the tea slurry below 10°C.
[0038] b) Stir and extract the coarsely ground slurry for 30 minutes, and then use a butterfly centrifuge to centrifuge and remove slag after controlling the temperature of the interlayer cooling water to keep it below 10°C.
[0039] c) Filtrate the centrifugate with a 0.2 μm ceramic membrane. During the filtration process, the interlayer cooling water is used to reduce the frictional heat generation during the filtration process, so that the temperature is controlled below 10°C.
[0040] d) The filtrate after...
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