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Preparation technology of pesticide-residue-free instant tea powder

A preparation process and technology of instant tea powder, applied in the directions of tea, tea extraction, food science, etc., can solve problems such as affecting the quality and safety of tea, and achieve the effects of energy saving, high yield and cost reduction

Inactive Publication Date: 2019-02-05
魏霄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is a big tea production country, but in the current large-scale production of tea, the use of pesticides is still inevitable, and pesticide residues have become an important issue affecting the quality and safety of tea in our country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a kind of preparation technology of instant tea powder without pesticide residue of the present invention adopts the following process steps:

[0018] Raw materials: dry green tea leaves are used as raw materials.

[0019] Extraction: put 300 kg of green tea into a 7000L multifunctional extraction tank, add 3000 kg of pure water at 60°C to the extraction tank, start the agitator, stir evenly and keep warm for 30 minutes.

[0020] Coarse filtration: when the leaching holding time reaches 30 minutes, open the water outlet valve at the bottom of the extraction tank, and pass the leached tea through a double-layer vibrating sieve, the upper sieve is 60 mesh, the lower sieve is 120 mesh, and the tea dregs are filtered out , to obtain 2200L tea, the mass percent concentration of soluble solids in the tea is 3.0%.

[0021] Cooling: The tea water obtained by coarse filtration is cooled by an 8M2 plate heat exchanger to reduce the temperature of the tea water to 3...

Embodiment 2

[0027] Embodiment 2: a kind of preparation technology of instant tea powder without pesticide residue of the present invention adopts the following process steps:

[0028] Raw material: The dry product of oolong tea is used as the raw material.

[0029] Extraction: Put 300 kg of oolong tea into a 7000L multifunctional extraction tank, add 5400 kg of pure water at 80°C to the extraction tank, start the agitator, stir evenly and keep warm for 45 minutes.

[0030] Coarse filtration: when the leaching holding time reaches 45 minutes, open the water outlet valve at the bottom of the extraction tank, pass the leached tea through a double-layer vibrating sieve, the upper sieve is 60 mesh, the lower sieve is 120 mesh, and the tea dregs are filtered out , to obtain 4500L of tea, the mass percent concentration of soluble solids in the tea is 1.7%.

[0031] Cooling: The tea water obtained by coarse filtration is cooled by an 8M2 plate heat exchanger to reduce the temperature of the tea ...

Embodiment 3

[0037] Embodiment 3: a kind of preparation technology of instant tea powder without pesticide residue of the present invention adopts the following process steps:

[0038] Raw materials: The dried tea leaves of Pu'er tea are used as raw materials.

[0039] Extraction: Put 200 kg of Pu'er tea into a 7000L multifunctional extraction tank, add 5000 kg of pure water at 95°C to the extraction tank, start the agitator, stir evenly and keep warm for 60 minutes.

[0040] Coarse filtration: when the leaching holding time reaches 60 minutes, open the water outlet valve at the bottom of the extraction tank, pass the extracted tea through a double-layer vibrating sieve, the upper sieve is 60 mesh, the lower sieve is 120 mesh, and the tea dregs are filtered out , to obtain 4400L of tea, the mass percent concentration of soluble solids in the tea is 1.0%.

[0041] Cooling: The tea water obtained by coarse filtration is cooled by an 8M2 plate heat exchanger to reduce the temperature of the ...

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Abstract

The invention relates to a preparation technology of pesticide-residue-free instant tea powder. The preparation technology is characterized by adopting the following preparation technology steps: selecting raw materials: taking a tea leafd dry product as a raw material; carrying out the steps of digestion, coarse filtering, cooling, membrane filtering, reverse osmosis membrane concentration, activated carbon adsorption, squeezing and filtering, spraying and drying and the like to prepare the instant tea powder with a dry powder state. According to the preparation technology, an activated carbon adsorption effect is used for removing pesticide remained in the instant tea powder; the technology has the characteristics of high yield, low energy consumption, easiness for operation and the like; the prepared pesticide-residue-free instant tea powder is good for body health of eaters; the content of pesticide residues is less than 0.01 mg / kg.

Description

technical field [0001] The invention relates to a preparation process of instant tea powder without pesticide residues, in particular to a preparation method of instant tea powder without pesticide residues by using dry tea leaves of green tea, oolong tea, black tea or Pu'er tea as raw materials. Background technique [0002] my country is a big tea producing country, but in the current large-scale production of tea, the use of pesticides is still unavoidable, and pesticide residues have become an important issue affecting the quality and safety of tea in our country. In recent years, many countries have stricter requirements on tea quality and safety standards, further increased the types of tea pesticide testing, and lowered the maximum pesticide residue indicators in tea. Pesticide residues have become the most anticipated quality and safety issue for China's tea export and domestic sales. Therefore, it is of great practical significance to study the method of reducing p...

Claims

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Application Information

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IPC IPC(8): A23F3/18A23F3/20A23F3/28
CPCA23F3/18A23F3/20A23F3/205A23F3/28
Inventor 魏霄
Owner 魏霄
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