Views: 71 Author: Site Editor Publish Time: 2023-10-16 Origin: Site
Difference one: oil extraction method
Hydraulic oil press is a kind of oil press equipment which takes liquid as pressure transmission medium and extrudes oil according to the principle of liquid pressure transmission. It is a closed-loop system composed of hydraulic system and oil press body, mainly composed of hydraulic pump station, control width, motor, electric cabinet, cylinder, simplified, frame and other parts. The screw oil press is a press equipment that forces feed through the screw shaft and produces high temperature and high pressure under the rotary extrusion with the press ring, so that the oil is crushed and extruded out of oil and cake. It is mainly composed of frame, control cabinet, spiral shaft, press ring, slag outlet and so on.
Difference two: refined oil quality
Hydraulic oil pressing method is a pure physical oil pressing method, which does not produce temperature and does not destroy the organic composition of the oil in the oil pressing process. The extracted oil is of good quality and has few impurities. It is especially suitable for some oils with high oil content (such as sesame, almonds, pine nuts, peanuts, walnut nuts and some animal oils) and materials that must be processed by cold pressing (such as chemical raw materials and pharmaceutical raw materials). In the oil pressing process, due to the friction of the machine ring will produce high temperature, which will destroy the organic composition of the oil: in the rotating friction process, some oil with high oil content will produce oil sludge from the press ring is extruded, and the impurity content in the oil will be more. Due to the high temperature of the oil, the nutrients of the oil will be destroyed. After pressing, it needs to be cooled.
Difference three: the recycling rate of cake residue
The hydraulic oil press does not destroy the organic components of the oil during the pressing process. Cake residue has high secondary value and wide application. For example, some food processing companies make walnut powder, apricot milk, peanuts, and some oil can be reduced or reprocessed into other foods. This has certain requirements for oil yield. The hydraulic oil press can control the amount of oil by adjusting different pressures, which must be more suitable for these enterprises; This is not possible on the screw press. The screw oil press will produce high temperature due to mechanical friction during the oil pressing process, and the water in the oil will be lost during the oil pressing process, which will also cause certain losses for the direct sale of cake residue. (The water content of the cake slag of the hydraulic oil press is about 10%, and the water content of the cake slag of the spiral oil press is only 2-3%)
Difference four: Energy consumption
The supporting power of small and medium-sized hydraulic oil press is generally 1.5-3kw, and the power of the smallest screw oil press is also above 5kW!
Difference five: failure rate and cost
The hydraulic press is operated by the oil pump and some control valves. The failure is mainly manifested in the sealing of pipes and plungers. During maintenance, it can be solved by replacing some gaskets and so on. It is easy to maintain and spare parts are cheap. The screw oil press works by mechanical rotation and produces a lot of friction in the process of oil pressing. The wear between the lead screw shaft and the pressure ring is faster. If the workload is large, it is generally replaced once every six months, the folding installation is more troublesome, and the price of accessories is relatively high.
