Pretreatment Section in vegetable oil processing plant

In the vegetable oil processing plant, before the extrusion of oil from oil seeds, an oil pretreatment process is typically undertaken to improve the efficiency of production and to ultimately save on costs.

In the vegetable oil production line, the pretreatment process typically involves working procedures of removing impurities from oil materials.

These impurities include the following items:

1. Organic impurities, such as stems and leaves, cord and chemical fibers.

2. Inorganic impurities such as soil and metal.

The entire oil processing plant generally includes: cleaning, sieving, hulling, separation, cracking, particle making, frying, softening, flaking, drying, and expelling oil materials.

Main machines:

Oil seeds cleaning: vibrating Separator, specific-gravity stoner, magnetic separator, etc.

Oil seeds crushing: toothed cracking roll (two pair), disc huller.

Oil seeds softening: horizontal softening kettle.

Oil seeds flaking: paired or two-pair flaking roll.

Oil seeds drying: chain dryer, air drying conveyor.

Oil seeds extruding: oil seeds extruder.

Oil seeds cooking: vertical stack cooker.

The Goal of the pretreatment section

1.Improve the quality of the oil and the cake.

2.Increase rate of productivity and reduce residual oil.

3.Increase the capabilities of the equipment.

4.Lessens wear and lengthens the life of the equipment.

5.Ensure safety.

Flow chart of oil pretreatment process

Process details:

1. Dehulling process

Cleaned oil seeds are crushed into 1/4-1/6 pieces in the toothed roll decorticator (two pair). Then oilseeds are squeezed strongly by the relative rotation of the two fluted rollers with different linear velocity. Moreover, the alveolus can split and cut the hulls of oilseeds. Thus the dehulling effect will be achieved.

2. Kernel and hull adjustment

The separated oil seeds kernel are conveyed into the kernel and hull adjustment screen through the conveyer scraper, because the higher hull content in the kernel is, the lower protein content in the finished oil seed meal is. Due to the need of oil seed meal with different protein content in the market, the process is mainly to adjust the hull content in oil seeds kernel and process oil seed meal with different protein content.

3. Flaking

The main purpose of flaking is to destroy cell wall within oil seed kernel so that oil within oil seed kernel can be extracted out. After the process of flaking, the thickness of material will be reduced and its surface area will be increased, which are in favor of moisture penetration and heat transfer towards the inside of particle in the cooking process.

4. Cooking

After wetting, heating, steaming, frying and other processing, the raw embryos come up complicated physical chemistry change in its interior and become mature embryos. Thus creating a better condition to extract the oil, the heat treatment process is called cooking.

5. Pressing process

Embryos after cooking are called cooked flakes, crude oil containing slags from presser is pressed into oil settling tank through oil scraper blade, after the slag is removed, the crude oil is sent to oil filter tank, and then it is sent to horizontal screw centrifuge for purification. Pre-pressed cake from oil presser is conveyed into extraction plant by cake collecting scraper and cake scraper, and then enters into the following process.

1.Warm hulling process reduces energy consumption.

2.Double cracking and hulling process improves the hulling ratio and reduce oil residue in the hull.

3.High volume hull bin makes production flexible.

4.Makes it possible to produce meals of various protein content (includes meal milling).

5.Adopts the complete explosion puffing process which makes subsequent oil seed processing easier..

6.Automated controls.

Zhengzhou New Lead Grain and Oil Science and Technology Co., Ltd.

Company Profile

Brief Introduction

Zhengzhou New Lead Grain & Oil Science and Technology Co., Ltd. is an industrial company focusing on processing of grain and oil food, research and development of new technology, production of mechanical equipment, installation and adjustment of complete engineering and training service.

Now the company has 158 personnel, of which the professionals take up more than 30%. And it has owned the second level qualification of state electromechanical engineering and has passed the quality management system certification of ISO9001-2000. It is already a research and development typed engineering company that combines scientific research, manufacturing and development.

Business Scope

 10-2000t/d vegetable oil pre-pressing and extraction plant;

 10-600t/d vegetable oil refinery plant;

 10-300t/d animal oil refinery plant;

 50-500t/d aroma peanut oil production line;

 3000-10000t/y soybean protein isolates production line;

 10000-30000t/y production line of soybean protein concentrate, textured protein;

 Production line of oil dewaxing, fractionation and winterization;

 Production line of glycerin and fatty acid;

 Production line of biology diesel oil.

Constructed projects

Oil pretreatment, pressing and extracting plant

Oil refining plant

Oil storage tank and small packaging engineering

Customer visit

Service Promise

Zhengzhou New Lead Grain & Oil Science and Technology Co., Ltd has always put the interests of customers first, insists on providing a customerized and comprehensive service, including on-site service and after-sale service. Now the specific commitments are as follows:

1. Ensure providing complete equipment and its accessories on time.

2. Ensure the installation and adjustment are once accepted.

3. Ensure providing high-quality equipments with competitive price.

4. Providing new products and advanced technology preferentially;

5.Providing the operating technicians professional training to ensure operate independently.

6. Appointing you a inspector during the installation process.

7. Arranging an professional installation team which will be managed by our PM.

8. We will be in charge of single machine commissioning, online debugging and feeding trial running to ensure that the machine can operate normally under the condition of full load. The company will provide you all kinds of relevant information and records according to the bidding document. Within one month after the acceptance, we will provide you qualified as-built documents as your request.

9. Within the warranty period, we repair equipments that has quality issues freely as well as free parts.

The company offers tailor-made turnkey solutions to the client’s right from designing and erection to commissioning and maintenance.

We will provide the owner first-class technology and service to ensure the project being completed smoothly.

If you are interested in our products or have any questions, please do not hesitate to contact us! We are always at your service!