Distribution refers to the new material obtained by mixing different liquids according to different weight ratios, so as to obtain mixed materials of different gravity, that is, the entire batching process is completed. Electrical control is divided into feeding and dosing and unloading, divided into manual control or adjustment and automatic control, these two working methods are available. Feeding system When the radar sensor detects that the material hopper is short of material, the feeding conveyor motor starts and runs, and the feeding vibrator and feeding motor start and run until the radar sensor detects that the material hopper is full. Unloading process can only be done when the weighing module metering bucket is detected to reach the set value.
020-34563445The distributor must ensure that the pressure of the reactor is within the allowable range, and achieve the batching by weighing and controlling the temperature of the reactor, and select the pressure-temperature cascade to adjust the batching. Due to the need for heat absorption in the early stage of polymerization reaction, and the release of a lot of heat during the reaction process, the reaction heat must be removed to maintain the reactor pressure. In addition, the amount of raw material propylene input determines the amount of catalyst, activator, etc. If the amount of propylene input cannot be accurately measured, it will cause the amount of catalyst, activator, hydrogen, etc., which will lead to the deterioration of reaction quality, product quality instability, increased consumption, and production accidents, so it is necessary to measure the amount of propylene feed.
After sending the feed control signal through the battering scale button, the programmable controller confirms which polymerization reactor propylene is thrown to and sends a signal to open the feed valve and pneumatic three-way ball valve of the reactor. Propylene is accurately tested by the pneumatic three-way ball valve to the mass flowmeter and then put into the polymerization reactor. At the same time, the flow pulse signal is sent to the programmable weighing controller to calculate the feed amount. After reaching the set amount of propylene, the weighing batching signal is issued to make the pneumatic three-way ball valve operate, cut off the feeding, and wait for the next reactor feeding.
In the process of polymerization reaction temperature-constant temperature, the reactor pressure is selected as the main ingredient parameter, and the reactor temperature or jacket water temperature is usually used as the auxiliary adjustment parameter. The temperature rise and constant temperature process of polymerization reaction is a process of endothermic and exothermic chemical reaction, which requires alternating switching of hot water and cold water, so that hot water can be heated in the initial stage of reaction to make polymerization reaction proceed. When the temperature rises to about 70℃ and the pressure reaches about 3.5MPa, the polymerization reaction starts in large quantities and releases a large amount of reaction heat. The system automatically passes cold water to take away the reaction heat to prevent overtemperature and overpressure.
