CN109730237B - Method for drying foam fruit pulp by changing microwave power according to temperature regulation - Google Patents
Method for drying foam fruit pulp by changing microwave power according to temperature regulation Download PDFInfo
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- CN109730237B CN109730237B CN201910004132.4A CN201910004132A CN109730237B CN 109730237 B CN109730237 B CN 109730237B CN 201910004132 A CN201910004132 A CN 201910004132A CN 109730237 B CN109730237 B CN 109730237B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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Abstract
A method for drying foam fruit pulp by changing microwave power according to temperature adjustment belongs to the fruit drying technology; the method comprises the steps of reducing the microwave power intensity according to the temperature of foam fruit pulp during microwave drying, sequentially reducing the microwave power according to the temperature of the foam fruit pulp in a microwave drying material heating stage, a microwave drying material constant-temperature drying stage and a microwave drying material rapid heating stage, and determining matched drying time to finish the drying treatment of the foam fruit pulp; the method combines temperature control and microwave foam drying theory for the first time, eliminates the phenomenon of overhigh temperature of the foam fruit pulp caused in the microwave heating process, reduces the degradation of active ingredients in the foam fruit pulp, and has the characteristics of microwave energy conservation, high microwave energy utilization rate and good product quality.
Description
Technical Field
The invention belongs to a fruit drying technology, and mainly relates to a method for drying foam fruit pulp by changing microwave power according to the adjustment of the temperature of the foam fruit pulp.
Background
The microwave foam drying technology is a technology for dehydrating foamed materials after foaming treatment in a microwave environment. However, the currently adopted constant power microwave heating method can cause the temperature of the dried foam fruit pulp to rise too fast in the heating process, so that the overheating phenomenon that the temperature cannot be controlled is caused, along with the drying, the water content of the foam fruit pulp is gradually reduced, the dielectric loss factor value of the foam fruit pulp is rapidly reduced, the microwave absorption capacity of the foam fruit pulp under the constant microwave power condition is gradually reduced, the utilization rate of microwave energy is greatly reduced, energy loss and waste are caused, and meanwhile, along with the drying, the too high temperature of the foam fruit pulp causes the great degradation of active nutrient components, the quality of the dried foam fruit pulp product is reduced, and the nutrient components are reduced.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and researches a method for drying foam fruit pulp by changing microwave power according to temperature regulation, so as to achieve the purposes of reducing microwave energy consumption, improving microwave energy utilization rate, ensuring the quality of dried foam fruit pulp products and reducing nutrient component loss.
The invention aims to realize the method for drying the foam fruit pulp by changing the microwave power according to the temperature regulation, the method reduces the microwave power intensity according to the temperature of the foam fruit pulp during microwave drying, and the specific method comprises three stages: firstly, the first stage of microwave drying is a material temperature rising stage: the material temperature is less than or equal to 65 ℃, the microwave power is 21kw, and the drying time is 2 min; and the second stage of microwave drying is a material constant-temperature drying stage: the material temperature is 65-80 ℃, the microwave power is 19kw, and the drying time is 8 min; thirdly, the third stage of microwave drying is a material rapid heating stage: the material temperature is above 80 ℃, the microwave power is 15kw, the drying time is 2min, the microwave drying of the foam fruit pulp is completed, and the dried fruit pulp with the water content of less than 12 percent is obtained.
The invention aims at the technical problems of low utilization rate of microwave energy, energy loss waste and great degradation of active ingredients of foam fruit pulp due to overhigh temperature caused by constant-power microwave drying, combines temperature control with a microwave foam drying theory for the first time, and provides a method for drying the foam fruit pulp by adjusting and changing microwave power according to the drying temperature of a drying material.
Detailed Description
The embodiments of the present invention are described in detail below. A method for drying foam fruit pulp by changing microwave power according to temperature regulation is characterized in that the microwave power intensity is reduced according to the temperature of the foam fruit pulp during microwave drying, and the specific method comprises three stages: the first stage of microwave drying is a material temperature rise stage: the material temperature is less than or equal to 65 ℃, the microwave power is 21kw, and the drying time is 2 min; secondly, the microwave drying stage is a material constant temperature drying stage: the material temperature is 65-80 ℃, the microwave power is 19kw, and the drying time is 8 min; the third stage of microwave drying is a material rapid heating stage: the material temperature is above 80 ℃, the microwave power is 15kw, the drying time is 2min, the microwave drying of the foam fruit pulp is completed, and the dried fruit pulp with the water content of less than 12 percent is obtained.
The invention has the technical effects that: through a large number of scientific research experiments, the microwave energy utilization rate of the foam fruit pulp product dried by the method reaches 52.84%, the vitamin C content of the dry fruit powder is 5.77mg/g, and the anthocyanin content is 26.77 mg/g. Compared with the method for drying the foam fruit pulp by using the constant-power microwave, the method has the advantages that under the same drying condition, the utilization rate of the microwave energy is increased by 9.48-23.59%, the content of the vitamin C in the dry powder is increased by 0.41-1.22 mg/g, and the content of the anthocyanin in the dry powder is increased by 1.31-4.19 mg/g, so that the utilization of the microwave energy is reasonable, the efficiency is high, the processing cost is reduced, the product quality is good, and the scientific and reasonable matching of the high-efficiency utilization of the microwave energy and the high quality of the dried material of the foam fruit pulp is realized.
Claims (1)
1. A method for drying foam fruit pulp by changing microwave power according to temperature regulation is characterized in that: the method reduces the microwave power intensity according to the temperature of the foam fruit pulp during microwave drying, and the specific method comprises three stages: firstly, the first stage of microwave drying is a material temperature rising stage: the material temperature is less than or equal to 65 ℃, the microwave power is 21kw, and the drying time is 2 min; and the second stage of microwave drying is a material constant-temperature drying stage: the material temperature is 65-80 ℃, the microwave power is 19kw, and the drying time is 8 min; the third stage of microwave drying is a material rapid heating stage: the material temperature is above 80 ℃, the microwave power is 15kw, the drying time is 2min, the microwave drying of the foam fruit pulp is completed, and the dried fruit pulp with the water content of less than 12 percent is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004132.4A CN109730237B (en) | 2019-01-03 | 2019-01-03 | Method for drying foam fruit pulp by changing microwave power according to temperature regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004132.4A CN109730237B (en) | 2019-01-03 | 2019-01-03 | Method for drying foam fruit pulp by changing microwave power according to temperature regulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109730237A CN109730237A (en) | 2019-05-10 |
| CN109730237B true CN109730237B (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910004132.4A Active CN109730237B (en) | 2019-01-03 | 2019-01-03 | Method for drying foam fruit pulp by changing microwave power according to temperature regulation |
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| CN (1) | CN109730237B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564189A (en) * | 2009-04-29 | 2009-10-28 | 东北农业大学 | Foam drying method of blackcurrant mashed fruit |
| CN105231346A (en) * | 2015-10-10 | 2016-01-13 | 宁波海通食品科技有限公司 | Method for rapid preparation of fruit and vegetable crisp grains by three-stage atmospheric pressure microwave spouting drying |
| CN105783427A (en) * | 2016-04-14 | 2016-07-20 | 华南理工大学 | Microwave vacuum drying method achieving staging control |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520574A (en) * | 1983-02-25 | 1985-06-04 | House Food Industrial Co., Ltd. | Process for drying foods under reduced pressure |
| RU2369284C1 (en) * | 2008-05-21 | 2009-10-10 | Государственное образовательное учреждение высшего профессионального образования Воронежская государственная технологическая академия | Method of continuous drying of food products using convective and microwave energy supply |
| CN104544475B (en) * | 2014-12-19 | 2018-04-13 | 华南理工大学 | A kind of method and apparatus of intensity adjustable microwave radiation technology freezing musculus cutaneus |
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2019
- 2019-01-03 CN CN201910004132.4A patent/CN109730237B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564189A (en) * | 2009-04-29 | 2009-10-28 | 东北农业大学 | Foam drying method of blackcurrant mashed fruit |
| CN105231346A (en) * | 2015-10-10 | 2016-01-13 | 宁波海通食品科技有限公司 | Method for rapid preparation of fruit and vegetable crisp grains by three-stage atmospheric pressure microwave spouting drying |
| CN105783427A (en) * | 2016-04-14 | 2016-07-20 | 华南理工大学 | Microwave vacuum drying method achieving staging control |
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| CN109730237A (en) | 2019-05-10 |
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