CN104432422A - Pineapple peeling method - Google Patents

Abstract

The invention discloses a pineapple peeling method. The pineapple peeling method comprises the steps that alkali liquor blanching is conducted on pineapples, peeling is conducted in a roller, and then the peels of pineapples are removed in an acid neutralization means. According to the chemical pineapple peeling method, during peeling operation, the mechanical use degree is high, a production line type continuous work method can be adopted, cost is reduced, labor intensity is low, efficiency is high, and the yield of pulp is high. In order to verify the yield of pulp of the pineapple peeling method, verification is conducted through ten batches of pineapples, the weight of each batch of pineapples ranges from 3 tons to 5 tons, a verification result shows that the average yield of pulp of the 10 batches of peeled pineapples reaches 80 to 85 percent, the yield of pulp of manual peeling is only 70 to 72 percent, and the yield of pulp of other mechanical peeling method can only reach 65 to 70 percent. By the adoption of the pineapple peeling method, the manufacturing cost of equipment is low, continuous scale production can be achieved, the yield of pulp of the peeled pineapples is greatly improved, and the cost of raw material is reduced.

Description

A kind of pineapple peeling method

Technical field

The present invention relates to a kind of pineapple peeling method, belong to fruit process technical field.

Background technology

Pineapple is that the most important tropical fruit (tree) of China one of processes raw material, and because its mouthfeel is unique, delicious succulence, welcomes by the masses deeply, is a kind of fruit that processing capacity is larger.No matter applied all greatly in can class, beverage class, pulp class or fruit filling series products.A procedure crucial in pineapple process eliminates pericarp, if pericarp eliminates thoroughly unclean, will affect pineapple deep processed product quality.Because pericarp surface is containing impurity such as silt, dust, bacteriums, also with the material such as anthocyanidin, enzyme in pericarp, the color blackening of fruit juice can be made, make fruit juice produce browning reaction, the microbiological indicator of fruit juice is also made to raise, storage period shortens, sense of taste is deteriorated, and directly affects the quality comprehensive index of fruit juice.So prepare high-quality deep processed product, prerequisite is exactly that pericarp eliminates totally.Pineapple peel surface is dispersed with many duck eyes regularly, is commonly called as pineapple eye, hides much impurity in the eyes in these pineapples, pineapple peel and pineapple eye will be removed when preparing fruit juice.Traditional method eliminating pineapple peel has two kinds, and one is rely on manual eliminating, and efficiency is low, and labour intensity is large, and cost is higher, and can not ensure the quality of peeling, quality risk is high, and is not easy to form large-scale production.Two is eliminate pericarp mechanically, the principle that machinery eliminates pineapple peel by two rollers, pineapple is clamped, and down carry, there is a hilt pineapple to cut in half from centre in the below of roller, every half of pineapple is under the drive of roller, continue to contact with the pecten under roller, by the cutting of the blade on extruding and pecten, pineapple meat is chipped away.Though the method can reach large-scale production, but it needs a large amount of Accurate Classification equipment and skin attach the supporting of pulp reclaimer, investment is large, otherwise a large amount of pulp can be stayed on skin and drain together, causes raw material ton to consume and raises, be unfavorable for cost savings, the shortcomings such as cutter easily weares and teares simultaneously, changes difficulty large, and plant maintenance is difficult, cause and produce discontinuous and problem that maintenance cost is too high, general enterprises is difficult to accept.Above-mentioned two kinds of methods, all belong to physical method, in fact by retrieval, also find no by chemical method, and the technology removing pineapple peel discloses.

Summary of the invention

The object of this invention is to provide a kind of pineapple peeling method, by chemical method, pineapple peel is removed, overcome the current efficiency of physical method removal existing for pineapple peel low, labour intensity is large, and cost is higher, the deficiency that quality risk is high.

In order to realize foregoing invention object, the invention provides a kind of pineapple peeling method, concrete technical scheme is:

(1) prepare alkali lye, it is that the blanching liquid of 20-25% is for subsequent use that the caustic soda taking food grade is made into concentration;

(2) blanching liquid be heated to 95-98 DEG C and keep constant temperature;

(3) clean pineapple is got as in blanching liquid, keep blanching 4-5 minute, the pineapple that blanching is good enters in the roller type peeler of band spray equipment and allowances for bark 1-2 minute, the drum rotation speed of roller type peeler is 50-80 rev/min, pineapple rolls in cylinder, phase mutual friction, can remove the skin of pineapple surface;

(4) gone the pineapple of skin with 0.1% aqueous citric acid solution carry out soaking or spraying 3-5 minute, make acid-base neutralization, detecting pineapple surface pH is 6.9-7.1, namely obtains complete having gone the pineapple of skin.

Taking the present invention of above-mentioned measure, is a kind of chemical peeling method, and in peeling operation, mechanical usage degree is high, can take the continuously-running duty of production line formula, and cost-saving, labour intensity is low, and efficiency is high, and pulp dressing percentage is high.In order to verify pulp dressing percentage of the present invention, the pineapple sarcocarp of 10 batches is demonstrated by the inventive method, often do not criticize 3-5 ton not etc., by checking, the average peeling pineapple pulp dressing percentage of 10 batches reaches 80-85%, and the pulp dressing percentage of manually peeling only has 70-72%, the pulp dressing percentage of other machine barkings only reaches 65-70%.The present invention not only equipment manufacturing cost is low, energy large-scale production continuously, and greatly improves the dressing percentage of pineapple peeling, reduces cost of material.

Detailed description of the invention

embodiment 1

(1) prepare alkali lye, the caustic soda taking food grade be made into concentration be 25% blanching liquid for subsequent use;

(2) blanching liquid be heated to 98 DEG C and keep constant temperature;

(3) the alkali lye spray equipment of a band conveyer belt is got, the wherein bringing-up section 10 meters of alkali lye spray equipment, allowing the clean pineapple sarcocarp that need remove the peel with the speed of 2.5 ms/min by alkali lye spray equipment, is 4 minutes by the time of bringing-up section, during this period of time allows alkali lye spray pineapple sarcocarp;

(4) above-mentioned alkali lye spray equipment is connected with being with the roller type peeler sprayed, pineapple sarcocarp after alkali lye spray enters in roller type peeler, rolling peeling 2 clock stage by stage, the aqueous citric acid solution of rolling peeling limit, limit spray 0.1%, makes pineapple sarcocarp surface p H6.9 namely obtain complete having gone the pineapple of skin.

Embodiment 2

(1) prepare alkali lye, the caustic soda taking food grade be made into concentration be 20% blanching liquid for subsequent use;

(2) blanching liquid be heated to 98 DEG C and keep constant temperature;

(3) get the dipping by lye device of a band conveyer belt, allow the clean pineapple sarcocarp that need remove the peel slow transit through the alkali lye of dipping by lye device, the time that pineapple sarcocarp is maintained in alkali lye is 5 minutes;

(4) above-mentioned dipping by lye device is connected with being with the roller type peeler sprayed, pineapple sarcocarp after dipping by lye enters in roller type peeler, rolling peeling 1 clock stage by stage, the aqueous citric acid solution of rolling peeling limit, limit spray 0.1%, makes pineapple sarcocarp surface p H7.0 namely obtain complete having gone the pineapple of skin.

Claims (1)

1. a pineapple peeling method ,it is characterized in that the concrete technical step of described barking method is:

(1) prepare alkali lye, it is that the blanching liquid of 20-25% is for subsequent use that the caustic soda taking food grade is made into concentration;

(2) blanching liquid be heated to 95-98 DEG C and keep constant temperature;

(3) clean pineapple is got as in blanching liquid, keep blanching 4-5 minute, the pineapple that blanching is good enters in the roller type peeler of band spray equipment and allowances for bark 1-2 minute, the drum rotation speed of roller type peeler is 50-80 rev/min, pineapple rolls in cylinder, phase mutual friction, can remove the skin of pineapple surface;

(4) gone the pineapple of skin with 0.1% aqueous citric acid solution carry out soaking or spraying 3-5 minute, make acid-base neutralization, detecting pineapple surface pH is 6.9-7.1, namely obtains complete having gone the pineapple of skin.