CN101773198A

CN101773198A - Processing method of low denatured rice bran meal

Info

Publication number: CN101773198A
Application number: CN200910071263A
Authority: CN
Inventors: 曾繁兴; 王俊发; 马浏轩
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-09
Filing date: 2009-01-09
Publication date: 2010-07-14

Abstract

The invention relates to a processing method of low denatured rice bran meal, comprising the following steps of: granulating through a granulator by using rice bran as raw materials; drying; leaching at low temperature by using a solvent; evaporating by using an evaporator; and carrying out three-level low temperature desolventizing on leached wet meal to obtain finished product meal. The invention has the process steps of rice bran tempering, granulating, drying, solvent leaching and low temperature desolventizing, has low rice bran meal denaturation and difficult rice bran meal gelatinization, can effectively extract the low denatured rice bran meal from rice bran meal, has the protein content of 17 percent, the nitrogen soluble index not less than 30 percent and the soluble protein index not less than 70 percent, enhances the application value of the rice bran, and can be widely used in the fields of infant foods, dairy ice cream products, baking foods, meat products, textile industries, and the like.

Description

The processing method of low denatured rice bran meal

Technical field: the present invention relates to that a kind of rice bran is modified, the processing method of granulation, drying, leaching, low temperature desolventizing, low denatured rice bran meal.

Background technology: at present, rice bran granulation, drying, solvent leach, adopt the high temperature precipitation mostly, temperature is at 90 ℃-120 ℃, high temperature precipitation protein denaturation is big, the easy gelatinization of rice bran meal, and the high temperature chaff dregs of rice can not extract low denatured rice bran meal, can only reduce the using value of rice bran and reduce economic benefit with rice bran as feed.

Summary of the invention: the objective of the invention is to overcome above-mentioned shortcoming, a kind of processing method of rice bran granulation low temperature desolventizing low denatured rice bran meal is provided, it has mainly solved existing rice bran granulation, drying, solvent leaching, adopt the high temperature precipitation, protein denaturation is big, the easy gelatinization of rice bran meal can not be extracted problems such as low denatured rice bran meal.The object of the present invention is achieved like this, and it is a raw material with the rice bran, uses the comminutor granulation, 40 ℃ of refining temperatures, modified time 15min, granulation diameter phi 2.5-φ 4; Enter drying equipment after the rice bran granulation, open air blast simultaneously, wind enters heat exchanger, medium air enters the counterflow drier drying, by the level sensor of counterflow drier and the revolution of electronics frequency modulator control controlling level and motor, enter the rotation broadcast feeder, to the downstream dryer drying, discharge through the rotation broadcast feeder again, the water content medium air is drawn by air-introduced machine; Dried rice bran granule materials is transported to infuser, carries out low temperature with solvent (hexane) and leaches, and the leaching form is that adverse current is dynamic; Concentrated blend after the leaching enters first evaporimeter, second evaporimeter, and the 3rd stripping evaporimeter evaporates, and a part is a crude oil, and another part is the solvent gas, and gas becomes liquid through condenser condenses; The wet dregs of rice after the leaching carry out three grade low-temp precipitations through A, B, C desolventizing machine; Become the dregs of rice behind the low temperature desolventizing, the dregs of rice enter cool dregs of rice device cooling, and the dregs of rice get product.This invention rice bran is modified, granulation, drying, solvent are leached, low temperature desolventizing, rice bran meal hangs down sex change, rice bran meal is difficult for gelatinization, can effectively extract low denatured rice bran meal, protein content 17% from rice bran meal, nitrogen soluble index 〉=30%, soluble protein index 〉=70% has improved the using value of rice bran, can be widely used in infant food, the dairy ice cream goods, fields such as bakery, meat products and textile industry.

Low temperature granulating technique parameter comparison

Be most preferred embodiment of the present invention below, it is raw material with the rice bran:

A, use the comminutor granulation, 40 ℃ of refining temperatures, modified time 15min, granulation diameter phi 2.5-φ 4, prilling temperature are controlled at 50 ℃-58 ℃, material compression ratio 1: 10, the moisture 12%-14% of material, nitrogen soluble index (NS1) 〉=30%, soluble protein index KOH 〉=70%, protein content 17%;

B, rice bran granulation enter counter-current drying equipment, open air blast simultaneously, and wind enters heat exchanger, 90 ℃ of medium air, blast 1900Pa, flow 3500m ³/ h enters the counterflow drier drying, by the level sensor of counterflow drier and the revolution of electronics frequency modulator control controlling level and motor, enter the rotation broadcast feeder, to the downstream dryer drying, again through rotation broadcast feeder discharge, wind is drawn air-introduced machine flow 12000m by air-introduced machine ³/ h, total head 1800pa, 90 ℃ of drying medium temperature, 50 ℃-58 ℃ of temperature of charge, drying time 25-30min, material moisture content 7%, material fines content 5%, the molten index NS1 of egg 〉=30%, soluble protein index KOH 〉=70%, protein content 17%;

C, dried rice bran grain material, be transported to infuser, carry out low temperature with solvent (hexane) and leach, the leaching form is that adverse current is dynamic, solvent extraction time 60-80min, 45 ℃-50 ℃ of solvent extraction temperatures, nitrogen soluble index NS1 〉=30%, soluble protein index KOH 〉=70%, protein content 17%, go into immersion part≤7%, solvent consumption 6KG/T material;

D, the concentrated blend after leaching enter first evaporimeter, second evaporimeter, vapour dike evaporimeter and evaporate, and a part is a crude oil, and another part liter becomes gas, and gas passes through condenser condenses and becomes liquid;

The wet dregs of rice after e, the leaching carry out three grade low-temp precipitations through A, B, C desolventizing machine, A, B, C low temperature desolventizing technical parameter, 140 ℃-142 ℃ of vapour phase medium temperatures, 68 ℃ of temperature of charge, A level precipitation time 7min (malleation), B level precipitation time 7min (negative pressure), C level precipitation time 5min (negative pressure), cool time 5min, the dregs of rice contain Residual oil≤0.8% (butt), dregs of rice water content≤12%, nitrogen soluble index (NS1) 〉=30%, soluble protein index KOH 〉=70%, protein content 17%, the dregs of rice contain molten 700ppm;

The dregs of rice behind f, the low temperature desolventizing enter the cold dregs of rice of cooler, cool time 5min, 30 ℃ of chilling temperatures, the dregs of rice get product.

Claims

1. the processing method of a low denatured rice bran meal, it is a raw material with the rice bran, it is characterized in that:

Enter counterflow drier equipment after b, the rice bran granulation, open air blast simultaneously, wind enters heat exchanger, 90 ℃ of medium air, blast 1900Pa, flow 3500m ³/ h enters the counterflow drier drying, by the revolution of the level sensor in the counterflow drier and electronics frequency modulator control controlling level and motor, enter the rotation broadcast feeder, to the downstream dryer drying, again through rotation broadcast feeder discharge, wind is drawn air-introduced machine flow 12000m by air-introduced machine ³/ h, total head 1800pa, 90 ℃ of drying medium temperature, 50 ℃-58 ℃ of temperature of charge, drying time 25-30min, material moisture content 7%, material fines content 5%, the molten index NS1 of egg 〉=30%, soluble protein index KOH 〉=70%, protein content 17%;

C, dried rice bran granule materials, be transported to infuser, carry out low temperature with solvent and leach, the leaching form is that adverse current is dynamic, solvent extraction time 60-80min, 45 ℃-50 ℃ of solvent extraction temperatures, nitrogen soluble index NS1 〉=30%, soluble protein index KOH 〉=70%, protein content 17%, go into immersion part≤7%, solvent consumption 6KG/T material;

The dregs of rice behind f, the low temperature desolventizing enter the cold dregs of rice of cooler, cool time 5min, dregs of rice chilling temperature 30 degree, the dregs of rice get product.