CN1192721C - Method for drying artemia - Google Patents

Abstract

The present invention relates to a technological method of drying artemia, which belongs to a technology of vacuum drying of biological products at lower temperature. The technology is composed of three steps of vacuum mixing for evaporation of the artemia, recycled material mixing and vacuum mixing and drying, wherein the vacuum mixing for evaporation means that the artemia is put in an evaporator under the conditions that the vacuum degree is smaller than 500mm of mercury column, the temperature is lower than 90DEG C and stirring is carried out to evaporate the artemia till the water content in the artemia reaches 75%; the recycled material mixture means that the artemia with 75% of water content is mixed with thoroughly dry artemia powder to obtain artemia in a loose state of which the average water content is less than 38%, and the pasty state of the artemia is avoided, which is caused by 40 to 75% of water content in the artemia, so the technology has the advantages of rapid drying speed, low energy consumption and high quality of the artemia.

Description

The drying process method of halogen worm

Technical field

The present invention relates to the biological products dry processing, relate in particular to its vacuum dehydrating at lower temperature.

Background technology

The halogen worm has another name called fairy shrimp, or claims salted shrimp gravy, is a kind of halophile organism of growing in bittern, and it becomes polypide to contain rich in protein, aliphatic acid and carbohydrate.It both can be used as educates fish, educates open-mouthed bait of shrimp seedling and the bait of senior pet fish, also can be used as upstream raw material, food additives or the feed addictive of high-grade nutrient food.Because the halogen worm is seasonal biological, be the open-mouthed bait whole year production of the high-grade nutrient food made of raw material, food additives, fishes and shrimps seedling for guaranteeing with the halogen worm, must carry out drying to bright halogen worm or freezing bright halogen worm.Because China starts late to the exploitation of halogen worm data, the report of relevant halogen worm drying means is less.At present, method commonly used has following two kinds: 1. the halogen worm cleaned, dried the pallet of packing into, send into the baking oven freeze-day with constant temperature; 2. in the solar energy drying room, dry.Because fresh halogen worm water content is high, the halogen worm behind centrifuge dripping, its water content still reaches about 90%, and is the moving thick porridge shape of semi-fluid; Dry by the fire to water content progressively be sticking paste after 75%, this moment is the most difficult, removes moisture 40% progressively loose again to water content again, until finished product.So above-mentioned two kinds of methods, have inevitably that drying time is long, production efficiency is low, can not produce and be difficult to guarantee the problem of product quality continuously.

Summary of the invention

In order to overcome the above-mentioned shortcoming that technology exists in the existing halogen worm drying process, the invention provides a kind of brand-new halogen worm drying means, in drying course, roll into a ball difficult problem of drying to overcome the halogen worm, improve its drying efficiency, satisfy the wilderness demand of society halogen worm dry powder because of forming sticking cream.

For achieving the above object, the technical solution used in the present invention is as follows:

The drying process method of halogen worm of the present invention is made of vacuum stirring evaporation, returning charge mixing, three steps of vacuum stirring oven dry.Described vacuum stirring evaporation, be the halogen worm of water content behind the centrifuge dripping about 90% to be packed into be provided with the evaporimeter of agitator, stir in stirring, evaporimeter be evacuated under vacuum is warming up to 70～90 ℃ less than the 500mm mercury column and with the halogen worm the condition carry out preliminarily dried, make halogen worm water content reduce to 75%; Described returning charge mixes, and is to be the water content of vacuum stirring evaporation gained that 75% halogen worm mixes with 1: 0.8～1.2 weight ratio with the artemia powder of drying fully, is 37% halogen worm through the average moisture content that stirs and be dispersed into rarefaction; The oven dry of described vacuum stirring is that returning charge mixing gained material is dried under vacuum is 70～90 ℃ and the conditions constantly stirred less than 500mm mercury column, halogen worm temperature, dries fully until the halogen worm.At last, with the halogen worm or the artemia powder of oven dry fully, sieve into several varigrained products and supply with the user; And the general wherein pulverizes as product or as the raw material that returns the thing blend step than the artemia powder granule of coarsegrain.

Description of drawings

For making technical scheme of the present invention more very clear, as follows with description of drawings in conjunction with the embodiments now:

Figure-embodiment of the invention implement and schematic flow sheet.

The specific embodiment

Example: the halogen worm that will clean, dries is from charging aperture 1.1 is packed reactor 1 into, reacting kettle jacketing and hot-water line O link, and by 80～95 ℃ of hot water of feeding, make that the halogen worm is warming up to 70～90 ℃ in the still, start simultaneously agitator 1.2 and with the jet pump 5 of reactor mouth 1.3 UNICOMs, make the reactor that the halogen worm is housed be decompressed to vacuum less than the 500mm mercury column, simultaneously be warming up to progressively that to make halogen worm temperature be 70～90 ℃ and constantly stir, halogen worm water content is reduced to about 75% by 90%, and this half-dried halogen worm is discharged through discharging opening 1.4.The dry halogen worm of this half-dried halogen worm and the output of screening machine 4 discharging openings, with weight ratio is that 1: 0.8～1.2 ratio adds from the charging aperture 2.1 of batch mixer 2 together, make half-dried halogen worm and absolutely dry halogen worm (powder) under the effect of stirring vane 2.2, fully mix, disperse, become the halogen worm of comparatively loose water content about 37% and discharge from discharging opening 2.3.The charging tray 3.2 that adds airtight disc type continuous drier 3 by the halogen worm of discharging opening 2.3 outputs through transport tape from charging aperture 3.1, the apical pore 3.4 of this drying machine link with jet pump 5 and the inner chamber vacuum that makes drying machine less than the 500mm mercury column, the bottom of charging tray 3.2 is provided with the heater 3.3 that links with hot-water line 0, halogen worm temperature is remained on 70～90 ℃, after the halogen worm is dried fully, discharge and import screening machine 4 through discharging opening 3.5 and sieve into varigrained finished product.In halogen worm drying course sticking dish takes place, above-mentioned charging tray surface coated has the polytetrafluoroethylene (PTFE) anti-stick coating, and stirs the halogen worm by the plate that stir-fries.

Halogen worm drying process of the present invention takes the negative pressure low temperature drying, not only improved the quality that rate of drying has also guaranteed the finished product artemia powder.Returning charge mixes, mixing with absolutely dry artemia powder to make by the halogen worm with water content about 75% becomes the halogen worm that water content is about 37% rarefaction, avoided the halogen worm o'clock to be sticking paste and be difficult for dry difficulty at water content 70～40%, for further bone dry provides condition, accelerated rate of drying and also reduced energy consumption; The present invention provides technical guarantee for satisfying social a large amount of needs to the halogen worm.

Being optimum process condition more than, is not the qualification fully to process conditions.

Claims (1)

1, the drying process method of a kind of halogen worm is made of vacuum stirring evaporation, returning charge mixing and three steps of vacuum stirring oven dry; It is characterized in that the evaporation of described vacuum stirring is with the decompression evaporator of packing into of the halogen worm behind the centrifuge dripping, stir in stirring, carry out preliminarily dried under the condition of vacuum less than 70～90 ℃ of 500mm mercury column, halogen worm temperature, make halogen worm water content reduce to 75%; Described returning charge mixes, and is be 75% halogen worm with the artemia powder of bone dry with the water content that vacuum stirring is evaporated gained to be that 1: 0.8～1.2 ratio is mixed with weight ratio, is 37% halogen worm through stirring and being dispersed into loose, average moisture content; The oven dry of described vacuum stirring is with the loose halogen worm of above-mentioned returning charge mixings gained, is that 70～90 ℃, vacuum are dried under less than 500mm mercury column and stirring condition fully in temperature.