A kind of sea cucumber dry-making method of dried
Technical field
The present invention relates to the dry processing technique field of marine product, relate in particular to a kind of method of utilizing the drying sea cucumber of microwave vacuum combined solar heat pump.
Background technology
Sea cucumber (
Stichopus Japonicus) belong to the Echinodermata Holothuroidea, high nutritive value is arranged, be in the world rare high protein, low fat, low sugar, without the natural health care of cholesterol, be called as " marine ginseng ".Modern pharmacological research shows, sea cucumber has the effects such as anticoagulation, antithrombotic, reduction blood sugar, antitumor, immunological regulation, Promote cell's growth, and the parent who day by day is subject to the consumer looks at.Can self-dissolving but sea cucumber leaves that seawater is very fast, therefore bright sea cucumber usually is processed to dried sea-cucumber and carries out long term storage, and the whole world has 90% bright sea cucumber to be processed to various dried products at present.
Traditional dry-making method of dried of sea cucumber is natural drying, and whole drying process is poach repeatedly, hangs salt and mixes ash, required time is long, and efficient is extremely low, and sanitary condition is wayward, have a strong impact on output and the quality of sea cucumber goods, can not satisfy the quality requirement of high-grade sea cucumber.Have in recent years the researcher to adopt the Freeze Drying Technique processing sea cucumber, although can preserve to greatest extent the nutritional labeling of sea cucumber, equipment investment is high, operating cost is expensive.Therefore, seek a kind of sea cucumber dry-making method of dried that can guarantee sea cucumber drying efficiency and quality and save drying cost, to improve the sea cucumber drying technology, adapt to the sea cucumber goods market that enlarges gradually and seem very important.
Microwave vacuum drying technology is that microwave drying and two dry technologies of vacuum drying are combined, and utilizes the microwave rapid and uniform heating, and make the moisture rapid evaporation under vacuum condition.This technology can realize material rapid draing at a lower temperature, and the nutritional labeling of preserving preferably material simultaneously at present has been widely used in the drying of fruit and vegetable food, and has applied to more and more the processing of aquatic products.Have the scholar that micro-wave vacuum is applied to the processing of sea cucumber, rate of drying is fast, the time is short.But sea cucumber is rich in protein, and the simple micro-wave vacuum later stage, the strong penetrating power of microwave energy easily caused protein denaturation along with moisture reduces, and affected sea cucumber quality and rehydration efficient.
Solar energy drying is to utilize solar radiant energy to carry out drying, and heat pump drying is to utilize heat pump absorbing heat from low-temperature heat source, thereby it is discharged under higher temperature material is carried out drying.The combined solar energy heat pump dry technology both can overcome solar energy drying climate condition restriction, the unsettled shortcoming of dry run, simultaneously can lower the heat pump drying cost, had the advantages such as energy-efficient, low-temperature circulating, continuous and automatic drying.
Therefore, micro-wave vacuum and solar heat pump dry technology can be joined together, the early stage of drying applied microwave vacuum drying technique makes moisture fast reducing in the sea cucumber, and it is putrid and deteriorated to avoid the long-time drying of product easily to cause, and keeps preferably the original nutritional labeling of material and organoleptic quality.The later stage of drying utilizes solar heat pump to carry out drying, and efficient energy-saving is easy to control dry terminal point.At present micro-wave vacuum and combined solar energy heat pump are not carried out drying bibliographical information to sea cucumber.
Summary of the invention
The object of the present invention is to provide a kind of sea cucumber dry-making method of dried, to improving sea cucumber drying efficiency and quality, it is significant to save cost.
For achieving the above object, the present invention adopts following technical scheme:
A kind of sea cucumber dry-making method of dried, the step of described method comprises: raw material selects, goes that internal organ, salt boil, cleaning, micro-wave vacuum, tempering, dry, the packing of solar heat pump; Salt boils: described salt boils and adopts mass concentration is 3% ~ 5% light salt brine.
Concrete steps are as follows:
(1) raw material is selected: choose more than fresh weight 120 g, and the build grossness, meat is abundant, and the surface is glossy, fresh free of contamination sea cucumber;
(2) remove internal organ: fresh and alive sea cucumbers is cutd open forward to body length 1/4 ~ 1/3 from anus from the outside of belly, reject rapidly internal organ, clear water is cleaned, and drains;
(3) salt boils: sea cucumber is put into the light salt brine boiling of boiling, the sea cucumber body is fixed, digestion process will stir, and pulls out after boiling 15 ~ 30min;
(4) clean: clean the sea cucumber surface with cold water, drain;
(5) micro-wave vacuum: the sea cucumber that drains is evenly put in the material disc of microwave vacuum drying chamber, carry out micro-wave vacuum;
(7) tempering: will take out tempering through micro-wave vacuum to the sea cucumber of moisture content 40%~50%;
(8) solar heat pump is dry: the sea cucumber after the tempering is carried out the solar heat pump drying, to moisture content≤15%;
(9) packing: dried sea cucumber carries out vacuum packaging and obtains product.
Described micro-wave vacuum is at microwave power 1kW~4kW, vacuum-55 kPa ~-carry out drying under the condition of 85kPa, the micro-wave vacuum temperature range is 30 ℃ ~ 50 ℃, drying mode is continuous microwave vacuum drying or batch microwave vacuum drying.
Described tempering condition is: place 2h~5h under 20~30 ℃ of temperature and 50~60% damp conditions.
Described solar heat pump is dry, and baking temperature is controlled at 40 ℃ ~ 60 ℃, adopts freeze-day with constant temperature or gradient freeze-day with constant temperature, and rotary speed 0 ~ 10r/min is set.
Described salt boils and adopts mass concentration is 3% ~ 5% light salt brine.
It is relatively simple to the invention provides a kind of technique, the sea cucumber dry-making method of dried that equipment requirement is moderate, micro-wave vacuum and solar heat pump drying mode are joined together, stage drying, give full play to the advantage of various drying modes, the early stage of drying utilizes micro-wave vacuum to slough rapidly portion of water, avoid product long-time dry easily corrupt rotten, the later stage of drying uses the solar heat pump dry technology to have energy-efficient, be easy to control the advantages such as final safe dryin-up point, simultaneously in dry run, utilize the tempering effect, make moisture redistribution in the sea cucumber, reach balance, to improve uniform drying.Compare with traditional sea cucumber dry-making method of dried, employing light salt brine dipping, make the final salinity of sea cucumber about 12%, the method can significantly improve drying efficiency, energy-conserving and environment-protective, the sea cucumber product lover who makes, rehydration is fast, and safe and sanitary better keeps the original nutritional labeling of sea cucumber, and this technology is easy to real-time control, can realize the cleaner production of continuous and automatic.
Remarkable advantage of the present invention is:
(1) the present invention combines micro-wave vacuum and solar heat pump drying, gives full play to the separately advantage of dry technology.Adopt micro-wave vacuum to slough rapidly portion of water at the early stage of drying, avoid long-time drying easily to cause product putrid and deteriorated, use the solar heat pump drying instead at the later stage of drying, energy-efficient, be easy to control final safe dryin-up point, avoid micro-wave vacuum to cause protein denaturation.
(2) the early stage of drying of the present invention adopts micro-wave vacuum, and moisture to outside, can reduce sea cucumber surface hardening phenomenon by internal delivery, keeps the permeability of material, is conducive to the rehydration of material later stage drying and product.
(3) combined drying mode provided by the invention is gentle, and wall of sea cucumber Stichopus japonicus shrinks evenly, the product lover, and avoid high temperature to cause the loss of sea cucumber nutrient composition, viscoplasticity is good after the rehydration, has improved the sea cucumber quality.
(4) the present invention utilizes the tempering effect behind micro-wave vacuum, makes moisture redistribution in the sea cucumber, reaches balance, carries out the later stage drying again, and uniform drying is improved, and is conducive to improve the sea cucumber drying quality.
(5) but solar heating system independent operating when solar heat pump drying system is sunny day, heat pump heating system is made auxiliary thermal source and solar heating system cooperation when overcast and rainy, both can take full advantage of solar energy, can lower to greatest extent operating cost again, have obvious green, environmental protection, energy-conservation characteristics.
(6) microwave itself can play the effect of sterilizing, is conducive to improve the product health, Shelf-life.
(7) the present invention is easy to real-time control, compares with traditional sea cucumber drying technology, can effectively shorten drying time, enhances productivity, and produces environment friendly and pollution-freely, is convenient to realize continuously, the cleaner production of automation.
(8) sea cucumber of combined drying can avoid using merely the local coking phenomenon of micro-wave vacuum appearance on sense organ, and the shrinkage ratio micro-wave vacuum is little by 1.5 ~ 2.3%, and reconstitution rate improves 1.2 ~ 2 times, and sensory evaluation is higher than micro-wave vacuum; On rate of drying, the more simple solar heat pump of combined drying speed is dry to improve 50%, and the rehydration quality is also more excellent.
The specific embodiment
Below be several specific embodiment of the present invention, further specify the present invention, but the present invention is not limited only to this enforcement.
Embodiment 1
(1) raw material is selected: choose fresh weight 150g, and the build grossness, meat is abundant, and the surface is glossy, fresh free of contamination sea cucumber;
(2) remove internal organ: fresh and alive sea cucumbers is cutd open forward to body length 1/4 ~ 1/3 from anus from the outside of belly, reject rapidly internal organ, clear water is cleaned, and drains;
(3) boil ginseng: sea cucumber is put into the 3% light salt brine boiling of boiling, the sea cucumber body is fixed, digestion process will stir, and pulls out after boiling 20min;
(4) cold water cleans: clean the sea cucumber surface with cold water, drain;
(5) measure the initial aqueous rate: sea cucumber initial aqueous rate is measured in sampling;
(6) micro-wave vacuum: the sea cucumber that drains is evenly put in the material disc of microwave vacuum drying chamber, under microwave power 3kW and vacuum-80kPa, carry out micro-wave vacuum;
(7) tempering: will take out through micro-wave vacuum to the sea cucumber of water content 40%, and place tempering 3h under temperature (20 ℃) and humidity (50%) environment;
(8) solar heat pump is dry: the sea cucumber after the tempering is carried out the solar heat pump drying, and 55 ℃ of baking temperatures are to moisture content≤15%.
(9) finished product: dried sea cucumber carries out vacuum packaging, storage, check and obtains finished product.
Embodiment 2
(1) raw material is selected: choose fresh weight 120g, and the build grossness, meat is abundant, and the surface is glossy, fresh free of contamination sea cucumber;
(2) remove internal organ: fresh and alive sea cucumbers is cutd open forward to body length 1/4 ~ 1/3 from anus from the outside of belly, reject rapidly internal organ, clear water is cleaned, and drains;
(3) boil ginseng: sea cucumber is put into the 3% light salt brine boiling of boiling, the sea cucumber body is fixed, digestion process will stir, and pulls out after boiling 25min;
(4) cold water cleans: clean the sea cucumber surface with cold water, drain;
(5) measure the initial aqueous rate: sea cucumber initial aqueous rate is measured in sampling;
(6) micro-wave vacuum: the sea cucumber that drains is evenly put in the material disc of microwave vacuum drying chamber, under microwave power 3kW and vacuum-70kPa, carry out micro-wave vacuum, adopt the intermittently drying mode;
(7) tempering: will take out through micro-wave vacuum to the sea cucumber of water content 45%, and place tempering 4h under temperature (30 ℃) and humidity (60%) environment;
(8) solar heat pump is dry: the sea cucumber after the tempering is carried out the solar heat pump drying, and 50 ℃ of baking temperatures are to moisture content≤15%.
(9) finished product: dried sea cucumber carries out vacuum packaging, storage, check and obtains finished product.
Embodiment 3
(1) raw material is selected: choose fresh weight 120g, and the build grossness, meat is abundant, and the surface is glossy, fresh free of contamination sea cucumber;
(2) remove internal organ: fresh and alive sea cucumbers is cutd open forward to body length 1/4 ~ 1/3 from anus from the outside of belly, reject rapidly internal organ, clear water is cleaned, and drains;
(3) boil ginseng: sea cucumber is put into the 3.5% light salt brine boiling of boiling, the sea cucumber body is fixed, digestion process will stir, and pulls out after boiling 25min;
(4) cold water cleans: clean the sea cucumber surface with cold water, drain;
(5) measure the initial aqueous rate: sea cucumber initial aqueous rate is measured in sampling;
(6) micro-wave vacuum: the sea cucumber that drains is evenly put in the material disc of microwave vacuum drying chamber, under microwave power 4kW and vacuum-85kPa, carry out micro-wave vacuum;
(7) tempering: will take out through micro-wave vacuum to the sea cucumber of water content 50%, and place tempering 3h under temperature (30 ℃) and humidity (55%) environment;
(8) solar heat pump is dry: the sea cucumber after the tempering is carried out the solar heat pump drying, adopt the gradient freeze-day with constant temperature, the leading portion baking temperature is made as 60 ℃, is down to use 50 ℃ instead behind certain moisture content and be dried to moisture content≤15%.
(9) finished product: dried sea cucumber carries out vacuum packaging, storage, check and obtains finished product.