Oil press experience

First, the choice of oil press

A good oil press can save users a lot of trouble in oil processing. The selected model can process granular oil such as rapeseed, soybean, peanut, cottonseed, and tea seed. When purchasing, first look at whether the paint on the surface of the machine is even, check whether the parts of the machine are missing, and then turn the large pulley by hand to make it rotate a few more times to check whether there are foreign objects such as iron in the squeezing squeezing. Phenomenon, at the same time pay attention to the gear box internal gear engagement is normal.

Second, the correct installation of oil press

Before installation, clean up the newly purchased oil press. Pull out the spindle, remove the upper press cage, and grind the outer surface, inner surface, and screw feeder of the press screw with an emery cloth. Lubricate all the lubrication parts, and the type and brand of lubricant added in the gearbox should meet the requirements in the manual. After the round row is polished, it must be arranged according to the original position when it is installed. It cannot be misplaced, because the arrangement and sequence of the round rows have a great influence on the oil extraction performance. After the round-displacement machine is tightened with a compression nut, the degree of compression is suitable for the disk to be able to creep when the oil is squeezed. After the oil press is processed above, it can be anchored to the foundation with anchor bolts. During installation, the pulley of the motor should be aligned with the press pulley, the position is proper, the direction of rotation is correct, and the tightness of the belt should be adjusted properly.

Third, the use of oil press

Before using the oil press, first all aids and containers should be prepared to check and adjust the tightness of the belt. Then start the motor, make the machine run around 15min, check the speed of the squeeze screw shaft. The general speed should be around 33dmin. When idling, pay attention to the meshing condition of the gears in the gear box and whether the sound is normal, and whether the bearing parts and the motor are normal. When the oil press idling, the motor current should be about 3A. If the current is too high, it should be stopped and checked immediately.

After normal idling, prepare about 50kg of rapeseed or soybeans and prepare them for input into the hopper. Note: When the press is started, the feed cannot be too fast. Otherwise, the pressure inside the press squeezing suddenly increases, the squeezing screw shaft does not move, and the squeezing squash is blocked, even the squeezing cage is broken, and a major accident occurs. Therefore, when starting the compression, the feed should be evenly and slowly put into the hopper to run the oil press. Repeatedly for many times, lasting more than 3 to 4 hours, the temperature of the oil press is gradually increased and even smoke is emitted (this is a normal phenomenon). When the squeezing is started, the temperature of the squeezing sorghum is low and can be slowly twisted. The handle on the stump studs increases the thickness of the cake, and at the same time increases the moisture content of the infused billet until the temperature of the squeezing smash. Raise to about 90 °C, after the normal operation of the oil press, cake thickness can be adjusted to 1.5 ~ 2.5mm, and tighten the fastening nut.

After the normal operation of the oil press, the oil with high oil content is mostly concentrated in the row and the front group round row. The oil at the bar row accounts for about 60% of the total oil output. The round row at the front group accounts for about 30%; the oil at the end of the row accounts for only 30%. Repeatedly press two or three times to squeeze out the oil of rapeseed or soybeans. During this period, the more oily oil residue can be evenly mixed with the embryos, and the material should be kept even when it is unloaded. Otherwise it will affect the oil press life and oil rate.

During the operation, it is necessary to constantly check the cake output of the oil press, and control the moisture of the billet neither too high nor too low. The normal cake should be in the shape of a sheet, smooth on one side of the screw axis, and a lot of hair on the other side. If the cake is loose and weak, or the cake does not form, the color is darker, and it will be broken into pieces by hand. This shows that the filling material is too little water; if the cake is soft, large flakes, or oil foam increase, It means adding too much water. Under normal circumstances, there is no slag or little slag between the round rows, and slag is discharged at the bar row. If the slag is fine, it indicates that there is much moisture, and the powdered slag shows that there is less water. In addition, it can be seen from the change of the oil outlet position whether the moisture content is suitable or not. When the moisture content is too high or too low, the oil outlet position is moved backwards.

Fourth, to meet the requirements of the pretreatment process

Before the embryos are introduced, they must undergo a pretreatment process. The pretreatment quality will directly affect the normal operation of the oil press and the oil output rate. Different oils have different pretreatment process requirements, but they mainly include the following:

1. Clean up. The oil entering the processing plant contains certain impurities (sediment, stones, iron filings, etc.). If not carefully selected, it will accelerate the wear of internal parts of the oil press, reduce the oil yield, and even cause failures and accidents. With its supporting equipment: cleaning sieve, destoner, magnetic separator and so on.

2. Shelling. For shelled oil, it should be squeezed after shelling, which can increase production capacity and oil yield. With its supporting equipment: Sheller, separation screen, separator and so on.

3. broken. Some oils can be pressed into the whole material, but after crushing, rolling and then pressing, the oil yield can be significantly increased. With its supporting equipment: crusher, embryo rolling machine.

4. Steamed and fried. Steaming and frying is an important part to increase the oil yield. The commonly used method is to moisten the oil and then dry it in a wok so that the oil can reach the pressing water and temperature required by the process. The supporting equipment is: steaming pan, Fried seed pot.