CN1127596A - Process for producing soybean oil by clay-free decolouring refining - Google Patents

Abstract

The decolouring technology for refined soybean oil includes steam heating of raw oil, heat exchange in oil-oil heat exchanger, heating in high-temp heater, vacuum deodourizing, heat exchange in oil-oil heat exchanger, processing in colour reversion inhibiter and filtering, and features low cost, no pollution, and high quality of refined soybean oil.

Description

The production technique of soybean oil by clay-free decolouring refining

The production technique of soybean oil by clay-free decolouring refining of the present invention is a kind of peculiar methods that adopts no carclazyte decolouring to produce refined soybean oil.

At present, the existing decolouring technology of production refined soybean oil mainly is an absorption method.This is that a kind of utilization has the method that adsorbing material removes pigment in the degrease, and this method is extensive use of by vegetable oil mill, and the sorbent material that is adopted mainly contains acidic white earth and atlapulgite, also has activated carbon etc. in addition.The pigment of these sorbent materials in can both absorb oil under the situation of heating, thus reach the purpose of decolouring.Atlapulgite has become the maximum a kind of sorbent material of domestic and international oily factory's use now; Atlapulgite is to be made by wilkinite, and its industrial making method is comparatively complicated, generally need through open a mine, coarse crushing, acid activation, washing, filtration, drying, levigate and sieve etc. and just can make.In the technological process that adopts the carclazyte decolouring, the carclazyte add-on is 3-5%, and minimum oleaginousness is about 25% in the clay dregs of decolouring back, and the grease rate of loss after the decolouring is about about 1% like this.So have the cost height, waste greatly, cause serious environmental to pollute simultaneously again with adding carclazyte decolouring soybean processing oil, all can make grease have peculiar smell after the decolouring in addition, past contact will be taken off to distinguish the flavor of and be handled.At existing problem in the prior art, the method for developing a kind of novel production refined soybean oil is very necessary.

In view of existing problem in the above-mentioned prior art, the objective of the invention is to develop a kind of new process of production of soybean oil by clay-free decolouring refining, make it have characteristics such as production cost is low, pollution-free, the soya-bean oil quality is good.Adopt the novel process of soybean oil by clay-free decolouring refining, thereby therefore the interpolation carclazyte vacuum decoloration technology that can discard tradition will make that great change takes place the production technique to refined soybean oil in the oils industry.

The production technique of soybean oil by clay-free decolouring refining of the present invention; Its art breading is undertaken by following seven steps:

The first step: at first stock oil is sent into the steam heater heating, its oil temperature is heated to 110 ℃ by normal temperature, and vapor pressure is more than or equal to 0.18MPa;

Second step: stock oil is sent in oil-oil heat exchanger, carried out heat exchange with the work in-process oil that is returned by the vacuum tank foldback, wherein stock oil rises to 175 ℃ by 110 ℃, and work in-process oil drops to 160 ℃ by 220 ℃;

The 3rd goes on foot: the oil after the heat exchange is sent into carried out heat in the high temperature heater (HTH), its oily temperature control is between 220 ℃-230 ℃, and the heat of high temperature heater (HTH) is supplied with by high-temperature heater;

The 4th step: will carry out the deodorization processing in the oil suction vacuum tank after pyroprocessing, its temperature is controlled between 210 ℃-220 ℃; Pressure is 0.08-0.09MPa, and deodorization time was not less than 1 hour;

The 5th step: will carry out heat exchange in the work in-process oil foldback oil return-oil heat exchanger after deodorization is handled through in vacuum tank, carrying out;

The 6th step; To send in the color reversion interceptor through the work in-process oil after oil-oil heat exchanger is handled heat exchange and handle; Through bi-level treatment, the first step drops to 110 ℃ with the oil temperature by 160 ℃ altogether; The second stage drops to the oil temperature below 60 ℃ or 60 ℃ by 110 ℃;

The 7th step: will send into through the work in-process oil after the color reversion interceptor is handled and carry out filtering to remove impurity in the security filter, the security filter operating pressure is less than 0.8MPa; After security filter was handled, then making processed oil was refined soybean oil.

It is a major transformation of China's oil processing industry that the present invention adopts soybean oil by clay-free decolouring refining, this technological process has been abandoned traditional interpolation carclazyte vacuum decoloration technology, adopt unique working method, through high temperature, modern technologies such as high vacuum are refining to form, its quality is better than one-level soybean oil (GB), be lower than salad oil, fume indication 〉=170 ℃ have removed the original beany flavor of soybean oil, the fragrant that has kept soya-bean oil again is specially adapted to the taste and the characteristics of northerner's edible soybean oil, fries in shallow oil, fried, cook no oil smoke, nothing is splashed, the release housewife removes the hardship of greasy dirt, and no carcinogenic substance produces, and has ensured people's health.Original processing method adopts and adds then cost height of carclazyte decolouring soybean processing oil, and waste is big, causes serious environmental pollution again, and adopting the present invention to produce refined soybean oil promptly has considerable economic that good benefits in environment and social benefit are arranged again.

Specific embodiments of the invention are shown in process flow sheet:

Among the figure:

YL--stock oil ZJ--steam heating

YY--oil-oily heat exchange GJ--high temperature heater (HTH)

GL--high-temperature heater ZG--vacuum canister

HZ--color reversion resistance order ends device RG--security filter

CY--processed oil GZ--refined soybean oil

Specific embodiment of the present invention is: at first raw material soya-bean oil is sent into the steam heater heating, its oil temperature is heated to 110 ℃ by normal temperature, and vapor pressure is 0.19MPa.Raw material soya-bean oil after heating is sent in oil-oil heat exchanger, carry out heat exchange with the work in-process oil that returns by the vacuum tank foldback, by oil in pipeline internal recycle and the inside and outside thermal convection of pipeline, heat conducting effect, wherein raw material soya-bean oil rises to 175 ℃ by 110 ℃, and work in-process soya-bean oil drops to 160 ℃ by 220 ℃.Raw material soya-bean oil after the heat exchange sent into carry out heat in the high temperature heater (HTH), its oily temperature control is supplied with by high-temperature heater at the heat of 2 ℃ of high temperature heater (HTH)s of 225 ℃ of errors.To carry out the deodorization processing in the soya-bean oil suction vacuum tank after pyroprocessing again, its temperature is controlled at 2 ℃ of 215 ℃ of errors, and pressure is 0.085MPa, and deodorization time is 1.5 hours; After above-mentioned art breading, make raw material soya-bean oil form work in-process oil.Work in-process oil foldback is again got back to and is carried out heat exchange in oil-oil heat exchanger, and the work in-process oil after heat exchange is handled is sent in the color reversion interceptor again and handled.Through bi-level treatment, the first step drops to 110 ℃ with the oil temperature by 160 ℃ altogether; The second stage drops to 60 ℃ with the oil temperature by 110 ℃.Be sent to by the work in-process soya-bean oil after the bi-level treatment in the color reversion interceptor again and carried out filtering to remove impurity in the security filter, the security filter operating pressure is 0.7MPa; After security filter was handled, then making processed oil was refined soybean oil.

Claims (1)

1, a kind of production technique of soybean oil by clay-free decolouring refining; The art breading that it is characterized in that refined soybean oil is undertaken by following seven steps:

The first step: at first stock oil is sent into the steam heater heating, its oil temperature is heated to 110 ℃ by normal temperature, and vapor pressure is more than or equal to 0.18MPa;

Second step: stock oil is sent in oil-oil heat exchanger, carried out heat exchange with the work in-process oil that is returned by the vacuum tank foldback, wherein stock oil rises to 175 ℃ by 110 ℃, and work in-process oil drops to 160 ℃ by 220 ℃;

The 3rd goes on foot: the oil after the heat exchange is sent into carried out heat in the high temperature heater (HTH), its oily temperature control is between 220 ℃-230 ℃, and the heat of high temperature heater (HTH) is supplied with by high-temperature heater;

The 4th step; To carry out the deodorization processing in the oil suction vacuum tank after pyroprocessing, its temperature is controlled between 210 ℃-220 ℃; Pressure is 0.08-0.09MPa, and deodorization time is for being not less than 1 hour;

The 5th step: will carry out heat exchange in the work in-process oil foldback oil return-oil heat exchanger after deodorization is handled through in vacuum tank, carrying out;

The 6th step: will send in the color reversion interceptor through the work in-process oil after oil-oil heat exchanger is handled heat exchange and handle; Through bi-level treatment, the first step drops to 110 ℃ with the oil temperature by 160 ℃ altogether, and the second stage drops to the oil temperature below 60 ℃ or 60 ℃ by 110 ℃;

The 7th step: will send into through the work in-process oil after the color reversion interceptor is handled and carry out filtering to remove impurity in the security filter, the security filter operating pressure is less than 0.8MPa; After security filter was handled, then making processed oil was refined soybean oil.

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