Efficient desalting device and efficient desalting method for salted egg white

Abstract

The invention discloses a desalting device and a desalting method for salted egg white, which are characterized in that the desalting device comprises a salted egg white drum (1), a plurality of shunt-wound ultra-filtration assemblies (2) and a backwashing drum (3). The salted egg white drum (1) is connected with the lower ends of the plurality of shunt-wound ultra-filtration assemblies (2) through a valve (6) and a first circulation pump (13), the upper ends of the plurality of shunt-wound ultra-filtration assemblies (2) are connected with the salted egg white drum (1) through a circulation valve (10), the backwashing drum (3) is connected with the lower ends of the plurality of shunt-wound ultra-filtration assemblies (2) through a valve (11), a second backwashing pump (14) and a valve (8), and the upper ends of the plurality of shunt-wound ultra-filtration assemblies (2) are connected with the backwashing drum (3) through a circulation valve (9). The desalting method includes that: the salted egg white is added with water to be diluted to 14-20 wt% and then is input into the salted egg white drum (1) through a valve (4), a first pump (13) is opened, pressure is 0.1-0.3 MPa at room temperature, the egg white is desalted circularly through the plurality of shunt-wound ultra-filtration assemblies (2), saline water is discharged from the position of the valve (8) and sampled for salt content detection, salt content is smaller than or equal to 0.85%, all the valves are closed, a valve (5) is opened, and desalted egg white solution enters the next procedure through the position of the valve (5).

Description

Technical field: [0001] The invention relates to a salted egg white desalination device and a desalination method thereof, belonging to the field of food or egg product processing. Background technique: [0002] Due to the high molecular weight of protein in salted egg white, a by-product of salted egg yolk production, ranging from a few thousand to more than 100,000, due to the high viscosity of the salted egg white liquid, the traditional electrodialysis method is used to desalt the salted egg white. Pretreatment methods such as dilution are required, and the egg white liquid obtained by this method needs to be concentrated, and the operation process is cumbersome, which affects the continuous production. [0003] Chinese patent CN201010510484.6 discloses "a salted egg white desalination method", which adopts protein denaturation-refolding desalination method. The method of reversible denaturation of protein by adjusting the pH value to remove excess salt, although this m...

AI Technical Summary

Problems solved by technology

[0004] 1. Long production cycle: The process requires salted egg white to undergo a filtration treatment, a second sterilization treatment, a second pH adjustment treatment, a centrifugal desalination treatment and other processes, plus other processes, the entire production cycle is too long

[0005] 2. A large amount of acid and alkali is used: each batch of products needs to be adjusted twice in the desalination process, and the pH value is adjusted to reach the isoelectric point of salted egg white. From the perspective of production, this process itself has defects such as poor operability. It is conceivable that the amount of acid and alkali cannot be estimated

[0006] 3. The loss of protein and other nutrients is large: the method of protein denaturation and refolding is used for desalination, and a considerable part of protein and other nutrients are discarded along with the coagulation and dissolution of the protein along with the sediment, resulting in unnecessary loss and waste

[0007] 4. Complex process, many equipment, high energy consumption and high cost: With the extension of the processing process, the equipment configuration between each process will also increase exponentially

The water, electricity, gas and other energy consumed by the secondary sterilization in the process will also increase, resulting in high production costs

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