CN114854485B

CN114854485B - Method for preparing cyperus esculentus edible oil by adopting spiral oil press

Info

Publication number: CN114854485B
Application number: CN202210390422.9A
Authority: CN
Inventors: 张玲; 张均潭
Original assignee: Heilongjiang Tiantu Agricultural Technology Development Co ltd
Current assignee: Heilongjiang Tiantu Agricultural Technology Development Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2023-08-25
Anticipated expiration: 2042-04-14
Also published as: CN114854485A

Abstract

The application discloses a method for preparing cyperus esculentus edible oil by adopting a spiral oil press, and belongs to the technical field of oil pressing. The application solves the problems that the oil yield is low and the extruder is easy to be stuck and held by high-viscosity chufa cakes and can not continuously operate when the prior spiral oil press technology is adopted to produce chufa edible oil. According to the application, the rice hulls and the cyperus esculentus are mixed and pressed to prepare the cyperus esculentus edible oil, the fiber property of the rice hulls is utilized to reduce the viscosity of materials in the cyperus esculentus pressing process, so that the oil extraction rate reaches more than 18%, and the locking phenomenon is avoided. The bean cake obtained by the application contains rice hulls, can be directly used for brewing white wine, and can improve the wine yield because of adding the rice hulls to reduce the viscosity, so that the wine yield of more than 52 degrees per hundred jin of bean cake can reach more than 42 jin of white wine which exceeds 2 percent of wine without adding the rice hulls, and the purposes of simple preparation process and high wine yield are achieved.

Description

Method for preparing cyperus esculentus edible oil by adopting spiral oil press

Technical Field

The application relates to a method for preparing chufa edible oil by adopting a spiral oil press, and belongs to the technical field of edible oil pressing.

Background

The preparation process of the edible oil in China mainly comprises three steps of squeezing, leaching and subcritical extraction: (1) pressing, the production process is basically divided into two types: firstly, hydraulic pressure and manual feeding cannot be industrially produced, and meanwhile, the oil yield is low (only about 12 percent); secondly, screw squeezing has the advantages that compared with hydraulic pressure, the process can realize industrialized production, but for the cyperus esculentus with high oil content and sugar content, the squeezing presses the cyperus esculentus with increased viscosity to be locked and not to be squeezed, the squeezing loosens and does not produce oil, and meanwhile, the oil production rate is not high (about 12 percent); (2) Leaching, wherein the production process is not suitable for preparing oil from the cyperus esculentus with high oil content, sugar content and starch content; (3) Subcritical extraction is carried out, the production process is high in investment, high in high-pressure gas safety management cost, and the oil dreg residue liquid slag is high, so that the health is affected.

The cyperus esculentus is the underground tuber of the cyperus esculentus, is Sha Caoke herbaceous plant, is originally produced from Africa and Mediterranean coastal, and is distributed in all other big continents except for Dayan and Antarctic. The cyperus esculentus has the characteristics of waterlogging resistance, drought resistance, barren resistance, salt and alkali resistance and the like, has the characteristics of good adaptability, strong stress resistance, prominent yield and the like, is a novel herbal economic crop with high quality and high yield, and has higher comprehensive economic value. The cyperus esculentus planting has the characteristic of low occurrence rate of plant diseases and insect pests, and can be used as nuisanceless agricultural products.

The oil content of the cyperus esculentus fruits is generally 20% -35%, the sugar content is 20% -25%, the starch is 40%, the cellulose is 8% -14%, the viscosity of the materials is high due to high oil, sugar and starch contents when the cyperus esculentus edible oil is prepared by adopting a spiral oil press, and the conditions of locking of the press or low oil yield are easily generated during extrusion. Therefore, it is necessary to provide a method capable of improving the processing efficiency of the cyperus esculentus edible oil by the spiral oil press and improving the oil yield.

Disclosure of Invention

The application provides a method for preparing a cyperus esculentus edible oil by adopting a spiral oil press, which aims to solve the problems that the oil yield is low and the cyperus esculentus cake with high viscosity is easy to stick and hold by the oil press when the traditional spiral oil press technology is adopted to produce the cyperus esculentus edible oil and can not continuously operate.

The technical scheme of the application is as follows:

a method for preparing the chufa edible oil by adopting a spiral oil press comprises the following steps:

s1, performing ultra-drying pretreatment on the cyperus esculentus, and reducing the water content of the cyperus esculentus to be less than 8 pieces of water;

s2, heating the cyperus esculentus, and then mixing a certain amount of rice hulls into the cyperus esculentus;

s3, changing the original factory set rotating speed of the spiral oil press, and slowing down by 30%;

s4, adding the mixed materials into a spiral oil press, adding cold water to squeeze, adding the cold water to enable the oil pressing process of the cyperus esculentus to be smooth, obtaining ideal oil yield, and obtaining the cyperus esculentus edible oil and bean cakes after the oil pressing is finished.

Further defined, the drying process in S1 reduces the water content of the cyperus esculentus from conventional 13 waters to below 8 waters.

Further defined, after heating the cyperus esculentus to 80 ℃ -100 ℃ in S2, adding rice hulls with 5% by mass of the cyperus esculentus, and mixing.

Further defined, in S3, the rotational speed of the screw press is adjusted from the factory set 45 rpm to 30 rpm.

Further defined, the mixed material is added in S4, and meanwhile, cold water accounting for 4% of the mass of the cyperus esculentus is added at the feed inlet.

Further limited, the cyperus esculentus cake containing rice hulls can be directly used for brewing white wine, and the viscosity of the cyperus esculentus cake in the brewing process can be reduced due to the increase of the rice hulls, so that the wine yield is increased by 2%.

The application has the beneficial effects that:

(1) According to the application, rice hulls and the cyperus esculentus are mixed and pressed to prepare the cyperus esculentus edible oil, the fiber property of the rice hulls is utilized to reduce the viscosity of materials in the cyperus esculentus pressing process, the conditions that the locking of a squeezer and the excessive viscosity of the materials affect the oil penetration are avoided, the pressing process is smoothly carried out, and meanwhile, the oil yield is increased to more than 18%.

(2) The application adopts a special method that the super-drying treatment is carried out before the cyperus esculentus is squeezed, so that the water content of the cyperus esculentus is reduced to below 8 water, and the special method is mainly adopted because the oil content of the cyperus esculentus is generally 20-35%, the sugar content is 20-25%, the starch content is 40% and the characteristics of high oil content, sugar content and starch content, high viscosity when meeting heat and difficult exudation of grease are adopted.

(3) The application sets the rotation speed of the spiral oil press from 45 rpm to 30 rpm, mainly reduces the rotation speed to reduce the temperature control viscosity of the press chamber, and can also increase the residence time of materials in the oil press, thereby improving the oil yield.

(4) The material is added into the oil press and cold water is added at the same time, and the main purpose is to temporarily add the material which cannot permeate into the material, not increase the water content of the oil, only increase the lubrication in the pressing process, reduce the temperature of a pressing chamber, enable the pressing process to be smooth and improve the oil yield.

(5) According to the application, rice hulls and the cyperus esculentus are mixed and pressed to prepare the cyperus esculentus edible oil, and the obtained bean cake contains the rice hulls and is used for brewing white wine, so that the wine yield can be improved, and each hundred jin of bean cake meal can brew more than 42 jin of white wine with the alcoholicity of more than 52% (the wine yield of brewing wine without adding the rice hulls is less than 40%), thereby achieving the purposes of simple preparation process and high wine yield.

Detailed Description

The present application will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, methods and apparatus used, without any particular description, are those conventional in the art and are commercially available to those skilled in the art.

Example 1:

s1, performing ultra-drying pretreatment on the cyperus esculentus;

specifically, selecting full-grain cyperus esculentus, cleaning the cyperus esculentus by using clear water, and drying the cyperus esculentus by using an oven after cleaning is finished, so that the water content of the cyperus esculentus is lower than 8 pieces of water.

S2, heating the cyperus esculentus and mixing the cyperus esculentus with rice hulls;

specifically, after the cyperus esculentus is heated to 80-100 ℃, the cyperus esculentus is mixed with rice hulls, and the addition amount of the rice hulls is 5% of the mass of the cyperus esculentus.

S3, adjusting the rotating speed of the spiral oil press to 30 revolutions per minute from the original factory, adding the mixed material, adding cold water accounting for 4% of the mass of the cyperus esculentus, squeezing, enabling the squeezing process to be smooth, and improving the oil yield to be more than 18%, so as to obtain the cyperus esculentus edible oil and the bean cake.

Example 2:

example 2 differs from example 1 in that: the procedure and parameter settings were exactly the same as in example 1 without rice hulls.

The oil extraction rate of this example was only 10%, and the viscosity of the material was found to be high during the pressing process, but although the pressing process was performed smoothly without interruption, the oil extraction was not ideal, and was reduced by approximately 1-fold compared to that of example 1, mainly because rice hulls were not added to reduce the viscosity of the material during the pressing process of the cyperus esculentus.

Example 3:

example 3 differs from example 1 in that: the rice hull addition amount is 3% of the mass of the cyperus esculentus, and the rest of the operation process and parameter setting are exactly the same as those of the example 1.

The oil extraction rate in this example was only 14%, and the viscosity of the material was observed to be high during the pressing process, but the oil extraction was not ideal although the pressing process was performed smoothly without interruption, and was lower than that in example 1, mainly because the amount of rice hulls added was insufficient, the viscosity of the material was not well reduced, and the oil extraction rate was not ideal.

Example 4:

example 4 differs from example 1 in that: the rice hull addition was 7% and the rest of the procedure and parameter settings were exactly the same as in example 1.

The oil extraction rate of this example is about 16%, and is low as in example 1, because excessive amount of rice husk is added to take away a part of oil, the oil extraction time is correspondingly prolonged, and the preparation efficiency is reduced, so that the amount of rice husk added is selected to be optimal as 5% in example 1.

Example 5:

example 5 differs from example 1 in that: the super-drying treatment is not carried out on the cyperus esculentus, so that the water content of materials such as the cyperus esculentus and soybean is equal, namely, the conventional 13 water materials are adopted, and the rest operation process and parameter setting are completely the same as those in the example 1.

The oil extraction rate of the embodiment is only kept at about 6%, which is mainly caused by the special characteristics of 20% -35% of oil content, 20% -25% of sugar content and 40% of starch of the cyperus esculentus, when the water content of the cyperus esculentus is large, the viscosity of materials in the squeezing process is large, when the temperature is low, the squeezing treatment is difficult to produce oil, and when the temperature is slightly increased, the oil press is locked, so that the temperature in the squeezing process is difficult to control, and the smooth operation of the squeezing process is difficult to realize. Therefore, the equal water content of the materials such as high oil, high sugar, high starch, high viscosity, and the like, namely, the oil yield of 13 water presses is too low, which is one of the main differences compared with the prior art.

Example 6:

example 6 differs from example 1 in that: the rotational speed of the screw press during the pressing process was 45 rpm, which is the original set rotational speed, and the rest of the operation process and parameter settings were exactly the same as in example 1.

The oil press is locked in the initial stage of the pressing, and continuous and smooth pressing cannot be performed.

Example 7:

example 7 differs from example 1 in that: the rotation speed of the screw oil press in the squeezing process is the set rotation speed of the original factory, namely 45 revolutions per minute, the water content of the cyperus esculentus is the conventional 13 waters, and the rest operation processes and parameter settings are identical to those of the embodiment 1.

The oil extraction rate of this example was also about 6%.

Example 8:

example 8 differs from example 1 in that: the mixture was added without adding cold water, and the rest of the procedure and parameter settings were exactly the same as in example 1.

The oil press is locked in the initial stage of the pressing, and smooth pressing cannot be performed.

The above description is merely a preferred embodiment of the present application, and since the person skilled in the art can make appropriate changes and modifications to the above-described embodiment, the present application is not limited to the above-described embodiment, and some modifications and changes of the present application should fall within the scope of the claims of the present application.

Claims

1. A method for preparing the chufa edible oil by adopting a spiral oil press is characterized by comprising the following preparation steps:

s1, performing ultra-drying pretreatment on the cyperus esculentus to reduce the water content of the cyperus esculentus to below 8 water;

in the step S2, after the cyperus esculentus is heated to 80-100 ℃, adding rice hulls accounting for 5% of the mass of the cyperus esculentus for mixing;

s3, changing the original factory set rotating speed of the spiral oil press;

the rotating speed of the screw oil press in the step S3 is set to be 30 revolutions per minute by a factory;

s4, adding materials into a spiral oil press, adding cold water to squeeze the materials, adding the cold water to enable the oil pressing process of the cyperus esculentus to be smooth, obtaining ideal oil yield, and obtaining the cyperus esculentus edible oil and bean cakes after the squeezing is finished;

and S4, adding cold water accounting for 4% of the mass of the cyperus esculentus at the feed inlet while adding the mixed material, increasing lubrication, reducing the chamber temperature and preventing the squeezer from locking.

2. The method for preparing the cyperus esculentus edible oil by adopting the spiral oil press according to claim 1, wherein the bean cake contains rice hulls, and compared with the pure cyperus esculentus cake, the viscosity of the bean cake in the brewing process can be reduced, and the wine yield can be increased by 2%.