Application of filter press in the production process of fragrant vegetable oil

 

1. Why is filter press needed in the production of fragrant vegetable oil？

In the production of fragrant vegetable oil, it is necessary to retain the unique fragrance, smell and taste of the oil to the greatest extent, so when choosing the production process, it is necessary to choose a method that will not cause loss of its fragrance and other indicators.
The hydration degumming process in the current oil refining process will use a large amount of water, salt and phosphoric acid to condense and separate the colloids in the oil, and the subsequent dehydration treatment will cause considerable loss of the smell and fragrance in the oil.
In order to ensure that the fragrance of fragrant vegetable oil is not lost and to ensure the fragrance of fragrant vegetable oil, we use oil filter press as the main equipment in the degumming production of this type of product.

2. Why use filter press as the main colloid separation equipment for producing strong-flavored oil?

The filter press production of strong-flavored vegetable oil uses filter cloth, filter paper and other products as special filter media. It usually uses pump pressure or gravity to apply a certain pressure to the filtered suspension to make the liquid seep out to obtain the mechanical equipment of the process.

This physical form of separating colloids minimizes the loss of odor and fragrance caused by heating hydration and dehydration to strong-flavored vegetable oil.

3. Working method of filter press

The usual filtering mechanism of the filter press mainly consists of filter plate, filter frame, filter cloth, or pressing diaphragm. The filter plate is covered with filter cloth on both sides. When a pressing diaphragm is required (often used in the dewaxing and fractionation process in oil production). The material enters each filter chamber from the material hole on the thrust plate (head plate). The solid particles are retained in the filter chamber because their particle size is larger than the pore size of the filter medium (filter cloth), and the filtrate flows out from the outlet hole below the filter plate. When the filter cake needs to be squeezed dry, in addition to using diaphragm pressing, compressed air can also be used to flush away excess grease in the filter cake using airflow to reduce the oil content of the filter cake.

At present, the filter press in oil production adopts open flow filtration. The main purpose of choosing this filter is to clearly see the working condition of the water nozzle under each filter plate during the filtration process. When the filtrate flows out of the water nozzle intuitively, the working condition of each fast filter plate of the entire filter can be judged.

4. Tips for using filter press

Precoating: Precoating means that in the process of filtering crude oil, in order to ensure good filtering effect, the crude oil needs to circulate as a whole, form a stable coating on the filter cloth, and ensure that the production of each plate achieves quality control consistency.

It should be said that the precoating operation is very important. It is necessary to continuously check the technical indicators achieved by the precoating operation during the filtering operation to determine the degree of completion of the entire process.

Pressure: In order to ensure the safe production of the filter press, and to ensure the stability of the filter cloth during the production process. The driving pressure of the suspension should be kept stable to prevent the pressure from fluctuating too much. At the same time, the pressure requirement should not exceed 0.3mpa.
Excessive pressure will cause the filter plate and filter frame to rupture, causing serious production accidents.
Excessive fluctuations in the driving pressure will cause a knocking effect on the filter coating, causing the coating to fall off.

For in-depth communication and discussion on the related processes and technologies of strong flavor vegetable oil filter press, please contact HZFILTER, our Main types of the filter press we offering are plate & frame filter press, chamber recessed filter press, membrane filter press as well as stainless steel plate filter press. Each type of filter press is optional in manual jack type, pneumatic pump type, hydraulic type and fully automatic program controlled type. The filter plates available in plate & frame type, chamber recessed type and membrane type. Sizes ranges from 315x 280mm to 2000x2000mm, which is the fullest range among the filter press industry. Categories from the pressure, we are producing the 6 bar to 12 bar for the chamber recessed plate, besides, 12 bar & 20 bar squeezing pressure are designed for the membrane filter plates. We have served clients from different industries, mostly for semiconductor WWT, WWT, iron ore filtering, clay filtering, red mud filtering, chemicals filtering, carrageenan filtering , palm oil filtering, coconut oil filtering, dyestuff filtering, food industries, pharmaceuticals industry and other solid liquid separations applications.