CN103315294A

CN103315294A - Method for microwave vacuum drying of edible bird's nests

Info

Publication number: CN103315294A
Application number: CN2013102114708A
Authority: CN
Inventors: 林雪; 张文森; 洪伟宁
Original assignee: FUJIAN PINGANGE FOOD Co Ltd
Current assignee: FUJIAN PINGANGE FOOD Co Ltd
Priority date: 2013-05-31
Filing date: 2013-05-31
Publication date: 2013-09-25

Abstract

The invention discloses a method for microwave vacuum drying of edible bird's nests. The method comprises the following steps of immersing raw edible bird's nests by RO water for 20-30min, manually and gently picking hair out of the edible bird's nests, carrying out secondary immersion of the edible bird's nests by clear water for 20-30min to obtain edible bird's nest cups, carrying out draining and setting of the edible bird's nest cups, drying them in a vacuum microwave dryer having a vacuum degree of 0.060Mpa and microwave power of 230KW for 30min, taking out the dried edible bird's nest cups in a cleaned work room, and carrying out grading, weighing and packaging. The method can effectively improve production efficiency, guarantee stable product quality, greatly improve a drying rate, solve the traditional drying method problem of unstable product quality and effectively improve production efficiency.

Description

A kind of method that adopts vacuum microwave oven dry bird's nest

Technical field

The present invention relates to the processing method field of bird's nest, refer more particularly to a kind of method that adopts vacuum microwave oven dry bird's nest.

Background technology

Bird's nest claims again delicacy made from bird's nests, swallow root, swallow vegetables, for Apodidae animal esculent swift and multiplely belong to the nest nest that the swallow class builds up with condensation by mixings such as saliva and downs together.Mainly originate in China South China Sea Islands and Southeast Asian countries.Bird's nest can be divided into three kinds because of the acquisition time difference: 1, Bai Yan: once classified tribute ancient times as, therefore claim again the palace swallow; 2, former swallow; 3, blood swallow.The nutrition of bird's nest is higher, contains 50% protein, 30% carbohydrate and some mineral matters.Bird's nest is one of traditional famous and precious food of China, and the annual import bird's nest of China and goods thereof are up to 10,000,000,000 yuan, wherein take former swallow import as main.

The processing that former swallow will pass through immersion, removal of impurities, choose the complexity such as hair, oven dry just can be made finished product bird's nest (comprising swallow small cup, swallow bar, swallow cake, swallow silk).The traditional diamond-making technique of former swallow adopts " mineral water, filtered water or pure water be manual clean → choose hair → typing → air-dry " traditional handicraft basically, in the drying course (30～50 ℃) infected by microbes occuring very easily, causes the production technology of bird's nest and hygienic quality all to can not get for a long time effective raising.Monitoring according to authoritative department shows, the problem that bird's nest exists is mainly manifested on the food quality and safety health, as microorganism exceed standard, nitrite exceeds standard, water content is higher, do not have the unified problems such as classification standard.

Traditional drying mode of present bird's nest has following several method:

1, traditional drying mode of bird's nest generally adopts air-dry technology, be subjected to the such environmental effects such as space humidity, temperature, air-dry time reaches 12～24 hours, and is wayward to the water content in the finished product, easily infected by microbes occurs, and has the problems such as production efficiency is low, unstable product quality.

2, thermolamp oven dry, temperature is not higher than 60 ℃, avoids the moisture content excessive vaporization.Exist bake out temperature too high, easily cause the product variable color.

3, thermolamp and fan blow the oven dry combined techniques, bake out temperature is low, but is subjected to the such environmental effects such as space humidity, temperature, and drying time reaches 8～12 hours, wayward to the water content in the finished product, easily infected by microbes occurs, have the problems such as production efficiency is low, unstable product quality.

Summary of the invention

The object of the invention is to overcome above-mentioned weak point of the prior art and provide that a kind of technique is simple, the method for the employing vacuum microwave of constant product quality oven dry bird's nest.

The present invention realizes in the following way:

A kind of method that adopts vacuum microwave oven dry bird's nest is characterized in that: specific as follows:, gently the little Mao on the bird's nest is chosen by hand after former swallow 20-30 minute with the RO water soaking, formed the swallow small cup after 20-30 minute by the immersion of clear water secondary; The swallow small cup drained, finalizes the design, and to be placed on vacuum be 0.060Mpa, and microwave power is oven dry 30 minutes in the vacuum microwave drying device of 230KW; Then take out and carry out classification, weigh and pack in clean workplace.

The invention has the advantages that: but Effective Raise production efficiency, guarantee the bird's nest furnace drying method of constant product quality; Guarantee to increase substantially its rate of drying under the prerequisite of product quality, solve the unstable product quality problem that traditional furnace drying method exists, Effective Raise production efficiency.

The specific embodiment

The specific embodiment of the invention is described in detail in detail:

RO water is reverse osmose pure-water, and counter-infiltration is a kind of reverse travel motion of infiltration, is a kind ofly to drive the lower separation method that solute in the solution and solvent is separated by means of the selective retention effect of pellicle at pressure, and its aperture is greatly about 5～10A.It has been widely used in the purification of various liquid with concentrated, wherein the most general application example is in water treatment technology, can be with Impurity removals such as the inorganic ions in the former water, bacterium, virus, organic matter and colloids, to obtain high-quality pure water with reverse osmosis technology.

The electromagnetic radiation as waves that microwave is wavelength 1mm～1000mm, frequency 300～300000MHz, have penetrability; The principle of microwave drying is: microwave generator irradiates microwaves on the material that is dried, when microwave is penetrated people's material inside, penetrated wave makes water isopolarity molecule along with microwave frequency is done the synchronous high-speed rotation, the result that water isopolarity molecule is made High Rotation Speed like this makes the instantaneous generation frictional heat of material, cause material surface and inside to be heated up simultaneously, a large amount of hydrones is overflowed from material, reach dry materials.In the microwave drying process, thermograde, heat transfer and vapour pressure migratory direction are consistent, thereby have greatly improved the water translocation condition in the dry run; Simultaneously because the existence of Piezo-migration power, make microwave drying have dry from inside to outside characteristics, namely to material generally speaking, will be that the material internal layer is at first dry, overcome in conventional drying and to form duricrust because the material skin is at first dry and harden and hinder the shortcoming of moving outside the internal moisture continuation.Under vacuum environment, but the decrease baking temperature, and when guaranteeing the product color, the retention rate of Effective Raise thermal sensitivity composition reaches the requirement that increases substantially its rate of drying.

Embodiment 1:

In the bird's nest process, with the former swallow of import, in RO water, soaked 20-30 minute; Gently the little Mao on the bird's nest is chosen by hand, in clear water, carried out soaking the second time 20-30 minute; The container that is placed into a small cup type drains, finalizes the design; Be placed in the vacuum microwave drying device, oven dry is 30 minutes under control vacuum 0.060 MPa, the microwave power 230KW condition; Take out and carry out classification, weigh and pack in clean workplace afterwards.

Embodiment 2:

For the bird's nest that contains higher nitrite: with the former swallow of import, in RO water, soaked 20-30 minute; Gently the little Mao on the bird's nest is chosen by hand, in clear water, carried out soaking the second time 20-30 minute; Soaked for the third time after draining 20-30 minute; The 4th immersion is 20-30 minute after draining, and the container that is placed into a small cup type drains, finalizes the design; Be placed in the vacuum microwave drying device, oven dry is 30 minutes under control vacuum 0.060 MPa, the microwave power 230KW condition; Take out and carry out classification, weigh and pack in clean workplace afterwards.

Claims

1. a method that adopts vacuum microwave oven dry bird's nest is characterized in that: specific as follows:, gently the little Mao on the bird's nest is chosen by hand after former swallow 20-30 minute with the RO water soaking, formed the swallow small cup after 20-30 minute by the immersion of clear water secondary; The swallow small cup drained, finalizes the design, and to be placed on vacuum be 0.060Mpa, and microwave power is oven dry 30 minutes in the vacuum microwave drying device of 230KW; Then take out and carry out classification, weigh and pack in clean workplace.