CN103598663A - Method for skinning walnuts by hot-air drying and blowing and ethephon spraying - Google Patents

Abstract

The invention discloses a method for skinning walnuts by hot-air drying and blowing and ethephon spraying. The method is characterized by including paving harvested green-skin walnuts on a layered block rack, spraying with ethephon by times prior to hot-air drying and blowing, and then stacking the green-skin walnuts in a cool place or indoors at the temperature of 30 DEG C and relative humidity of 80%-95% for 3-4 days, wherein skinning rate reaches above 98%. The method has the advantages of high skinning rate and high skinning degree.

Description

A kind of hot blast dries and blows the method that ethephon (CEPHA)，2-(chloroethyl) phosphonic acid sprinkling walnut removes kind of skin

Technical field

Fruit processing technique field of the present invention, relates in particular to a kind of hot blast baking and blows the method that ethephon (CEPHA)，2-(chloroethyl) phosphonic acid sprinkling walnut removes kind of skin.

Background technology

Walnut kernel is rich in the needed by human materials such as protein, fat, carbohydrate, vitamin A, Cobastab, vitamin C, vitamin E and calcium, phosphorus, iron, zinc, carrotene, riboflavin, has very high nutritive value and medical value.Research shows, often eats walnut, and the blood sugar that not only can not raise, can also reduce the absorption of enteron aisle to cholesterol; Often eat walnut, there is the effect of ease constipation, treatment constipation, can make people's weightening finish of becoming thin; Often edible walnut, has the effect that profit skin, black beard and hair and control hair bleach too early and come off; Often edible walnut, the effect that there is brain tonic, strengthens memory and delay senility; Often edible walnut, has pleasant enriching blood, relieving cough and reducing sputum, the functions such as moistening lung kidney tonifying.

Based on efficient nutritive value and medical value, walnut is very popular, yet, fresh walnut has puckery kind skin, walnut peeling becomes the relatively thing of headache of people because this layer of puckery kind skin of walnut kernel, not only thin but also and pulp combine closely.Traditional walnut peeled technology adopts the freezing physical treatment method that waits of high temperature, and then manual decortication, and labour intensity is large, weak effect.Report discloses dipping by lye decortication method, hot boiling method and latest report disclosed " ethephon (CEPHA)，2-(chloroethyl) phosphonic acid " chemical agent immersion decortication method subsequently.

Yet, quality supervision department investigation discovery, ethephon (CEPHA)，2-(chloroethyl) phosphonic acid has hypotoxicity, needs two weeks to month ability to volatilize completely, if do not reach this cycle, noxious material will remain in fruit.With the chemical agent (ethephon (CEPHA)，2-(chloroethyl) phosphonic acid) of high concentration, to walnut peeling, even if do not affect kernel quality, people, when edible walnut, also can take in the agricultural chemicals remaining on duricrust unavoidably, and this is unfavorable for healthy, is also easy to cause the problems such as vomiting, diarrhoea.

Security hidden trouble based on above-mentioned, a kind of efficient, safe removing walnut green husk method becomes the focus of social extensive concern, the method that the present invention advertises in conjunction with decortication effect and the physics hot blast of chemical agent (ethephon (CEPHA)，2-(chloroethyl) phosphonic acid) excellence, proposes a kind of hot blast baking and blows the method that ethephon (CEPHA)，2-(chloroethyl) phosphonic acid sprinkling walnut removes kind of skin.

Summary of the invention

The object of the invention is to: provide a kind of hot blast to dry and blow the method that ethephon (CEPHA)，2-(chloroethyl) phosphonic acid sprinkling walnut removes kind of skin, solve existing ethephon (CEPHA)，2-(chloroethyl) phosphonic acid and soak the unmanageable problem of ethephon (CEPHA)，2-(chloroethyl) phosphonic acid consumption that walnut goes kind of skin technology to exist.

To achieve these goals, the technical solution used in the present invention is as follows:

(1) after Walnut Fruit is gathered, be placed on layered case divider every layer of lattice gear tiling Walnut Fruit one deck;

(2) to complete rear be 0.3%～0.5% ethephon solution spray Walnut Fruit by concentration to Walnut Fruit, and spray adopts method from bottom to top, ethephon solution spray per second 0.5L, spray time control half a minute;

(3) after spray finishes, unlatching air-heater carries out hot blast baking and blows, and air-heater blows out 200～250 ℃ of temperature, and it is 20～30 minutes that hot blast dries the time of blowing;

(4) hot blast dries after blowing bundle, then sprays with 0.1%～0.3% ethephon solution, and spray adopts method from bottom to top, ethephon solution spray per second 0.5L, and spray time is controlled half a minute;

(5) after spray finishes, unlatching air-heater carries out hot blast baking and blows, and air-heater blows out 150～200 ℃ of temperature, and it is 30～40 minutes that hot blast dries the time of blowing;

(6) secondary hot-air dries after blowing bundle, Walnut Fruit is taken off from lattice divider, then the thickness of press 50cm left and right piles in the cool or indoor, and under temperature is 30 ℃, the condition of relative humidity 80%～95%, through about 3～4 days, can be up to more than 98% from skin rate.

Go kind of a skin technology to compare with existing walnut, technical solution of the present invention adopts chemical agent (ethephon (CEPHA)，2-(chloroethyl) phosphonic acid) spray to dry and blow the scheme combining with physics (hot blast), solve existing ethephon (CEPHA)，2-(chloroethyl) phosphonic acid and soak the unmanageable problem of consumption that walnut barking method exists, its beneficial effect is: walnut peeling speed is fast, ethephon (CEPHA)，2-(chloroethyl) phosphonic acid consumption is easy to control, the phenomenon that ethephon (CEPHA)，2-(chloroethyl) phosphonic acid infiltrates kernel can not occur, and after peeling, Walnut shell epidermis is vivid attractive in appearance.

The specific embodiment

For technical scheme of the present invention is described, below in conjunction with instantiation, be described further.

For different collecting times and different kinds, below by instantiation, elaborate

Embodiment 1

Gather after fresh fragrant tinkling of pieces of jade Walnut Fruit, in accordance with the following steps peeling:

(1) the fresh fragrant tinkling of pieces of jade walnut of gathering is placed on layered case divider, every layer of lattice gear tiling Walnut Fruit one deck, lattice divider is that thin wire is worked out, and lattice divider is 3～5 layers, and the number of plies is too much unsuitable, in order to avoid spray is not exclusively during spray ethephon solution;

(2) to complete rear be 0.3%～0.5% ethephon solution spray Walnut Fruit by concentration to Walnut Fruit, and spray adopts method from bottom to top, ethephon solution spray per second 0.5L, spray time control half a minute;

(3) after spray finishes, unlatching air-heater carries out hot blast baking and blows, and air-heater blows out 200～250 ℃ of temperature, and it is 20～30 minutes that hot blast dries the time of blowing, the circular industry air-heater that the present invention adopts Shanxi Long Pai energy-conserving and environment-protective Co., Ltd to produce;

(4) hot blast dries after blowing bundle, then sprays with 0.1%～0.3% ethephon solution, and spray adopts method from bottom to top, ethephon solution spray per second 0.5L, and spray time is controlled half a minute;

(5) after spray finishes, unlatching air-heater carries out hot blast baking and blows, and air-heater blows out 150～200 ℃ of temperature, and it is 30～40 minutes that hot blast dries the time of blowing, the same step of air-heater (3) of employing;

(6) secondary hot-air dries after blowing bundle, Walnut Fruit is taken off from lattice divider, then the thickness of press 50cm left and right piles in the cool or indoor, and under temperature is 30 ℃, the condition of relative humidity 80%～95%, through about 3～4 days, can be up to more than 98% from skin rate.

In order to verify actual effect of the present invention, example 1 scheme has been carried out sample view test, and it the results are shown in

Table 1.

From upper table, can find out, peeling efficiency is relevant with collecting time, and the more late peeling efficiency of gathering is higher, and peeling degree is also subject to the impact of collecting time, and preferred collecting time is that early September is to the middle ten days.

Embodiment 2

The delicate fragrance kind walnut of gathering fresh, according to the barking method peeling of example 1, its sample view result of the test is in Table 2.

Embodiment 3

The longan cultivars walnut of gathering fresh, according to the barking method peeling of example 1, its sample view result of the test is in Table 3.

Interpretation of result and discussion: from the sample view result of example 1～3, walnut peeling efficiency is relevant with collecting time and Walnut Cultivars, and collecting time is more late, decortication effect is better, and peeling degree is higher, preferred, the present invention advises that walnut is gathered should be in good time, generally in mid-September, gathers.

Claims (1)

1. hot blast dries and blows the method that ethephon (CEPHA)，2-(chloroethyl) phosphonic acid sprinkling walnut removes kind of skin, it is characterized in that: processing step is as follows:

(1) after Walnut Fruit is gathered, be placed on layered case divider every layer of lattice gear tiling Walnut Fruit one deck;

(2) to complete rear be 0.3%～0.5% ethephon solution spray Walnut Fruit by concentration to Walnut Fruit, and spray adopts method from bottom to top, ethephon solution spray per second 0.5L, spray time control half a minute;

(3) after spray finishes, unlatching air-heater carries out hot blast baking and blows, and air-heater blows out 200～250 ℃ of temperature, and it is 20～30 minutes that hot blast dries the time of blowing;

(4) hot blast dries after blowing bundle, then sprays with 0.1%～0.3% ethephon solution, and spray adopts method from bottom to top, ethephon solution spray per second 0.5L, and spray time is controlled half a minute;

(5) after spray finishes, unlatching air-heater carries out hot blast baking and blows, and air-heater blows out 150～200 ℃ of temperature, and it is 30～40 minutes that hot blast dries the time of blowing;

(6) secondary hot-air dries after blowing bundle, Walnut Fruit is taken off from lattice divider, then the thickness of press 50cm left and right piles in the cool or indoor, and under temperature is 30 ℃, the condition of relative humidity 80%～95%, through about 3～4 days, can be up to more than 98% from skin rate.