China Liangshan Hongcheng Second Hand Chemical Equipment Co., Ltd. Company News

How to deal with the common failure of second-hand reactor, the company is engaged in Liangshan recycling second-hand reactor manufacturers, let Xiaobian take you to learn! When the vacuum hose is aging, please replace the vacuum hose in time. When the power switch is turned on, the indicator light is not on. We will check whether the external power supply is connected or whether the contact is not good. When replacing the fuse, turn off the switch, loosen the main engine spindle left and right, loosen the top screw and tighten it. When the motor is closed due to excessive temperature and overload, we will turn the shaft by hand at this time and try to see if it is heavy. At this point, we will clean the dirt in the contact part between the seal ring and the glass shaft and apply vacuum grease. When the voltage is unstable, we will cause the laboratory reactor speed display to be inconsistent with the actual situation and have our own errors, or the laboratory reactor power indicator to light up but not rotate.

What are the reasons for the sticky wall of stainless steel reactor? About this problem, as a second-hand reactor manufacturer in Liangshan recycling, let Xiaobian take you to learn about it! When the temperature, pressure and other glue making process indicators are not stable or fluctuate too much, the resin condensation reaction process is uneven, which is easy to cause sticky wall. Therefore, in the production, it should be slowly pressurized and heated. Generally, the water steam of about 0.15Mpa is kept for 2 ~ 3min and then slowly raised pressure and heated up. The lifting speed should be 0.1-0.15mpa per minute. If ammonia chloride is used as a catalyst, due to the fast reaction speed of ammonia chloride, the PH value can not be shown, and after the temperature rises, the PH value decreases rapidly, the reaction speed is accelerated, and the condensation reaction is too intense, resulting in gel and sticky wall. Due to the high sulfate content in urea, when urea is added in the later stage of the resin polycondensation reaction, it is equivalent to adding a curing agent to promote the resin to quickly cross-link into a network structure, if the treatment is not timely, it will make the resin solidified in the reactor, therefore, in the production should choose standard industrial urea raw materials, Limit the sulfate content of urea to less than 0.0001. Fourth, the temperature difference of the kettle wall cooling medium temperature is too low or suddenly cooling, so that the temperature difference between the kettle wall temperature and the material is too large, resulting in contact with the reaction kettle wall glue wall. Therefore, both heating and cooling should be carried out within a reasonable temperature difference range, usually the steam use temperature should be less than 180 ° C, the temperature difference thermal shock should be less than 120 ° C, and the cooling shock should be less than 90 ° C. At the same time, it should be noted that the appropriate inlet and outlet temperatures of the cooling medium are determined to maintain operational balance.

Centrifuge safety protection measures should be considered when purchasing There are many types of centrifuges, usually classified from the following aspects:   (1) According to the size of the speed can be divided into: low speed centrifuge, high speed centrifuge and high speed centrifuge; (2) According to the requirements of temperature can be divided into: ordinary centrifuge and frozen centrifuge; (3) According to the different rotor is divided into: horizontal rotor centrifuge and Angle rotor centrifuge; (4) According to the size of the centrifuge volume can also be divided into: floor centrifuge, desktop centrifuge, palm centrifuge, etc.; (5) According to the grade of centrifuges, it can also be divided into ordinary centrifuges and fine centrifuges. Ordinary centrifuges have few functions, and are not fine in terms of speed and capacity, such as: the speed of an ordinary centrifuge is 5000 RPM, but the actual speed can not reach 5000 RPM. Such centrifuges are only suitable for ordinary centrifugal work, such as separating serum and concentrating urine. Fine centrifuge has many functions, fine speed and capacity, and is suitable for some experiments with high requirements for centrifuges, such as: PCR experiments, blood component separation (mostly used in blood stations). Choose ordinary centrifuges, according to the size of the workload, mainly from two aspects of speed and capacity. The following details the purchase of fine centrifuge should pay attention to the problems: (1) Speed: Centrifuges are divided into low-speed centrifuges (< 10,000 rpm/min), high-speed centrifuges (10,000 rpm/min a 30,000 rpm/min), and high-speed centrifuges (> 30,000 rpm/min) according to the speed, each centrifuge has a rated speed, and the speed refers to the speed under no-load conditions. However, the speed varies according to the type of rotor and the size of the sample mass. For example, the rated speed of a centrifuge is 16000 rpm/min, indicating that the rotor rotates 16,000 times per minute when the load is not loaded, and the speed will certainly be less than 16000 rpm/min after adding the sample. The rotor is different, the speed is also different (an imported centrifuge can be selected with multiple rotors), the horizontal rotor can reach 1 5000 rpm/min, but the Angle rotor can reach about 14000 rpm/min, the specific difference to consult the product sales personnel and the relevant technical personnel of the production plant in detail, so the choice of speed should be careful, The selected centrifuge speed should be higher than the target speed. For example, if the target speed is 16000 rpm/mIn, the selected centrifuge speed must be higher than 16000 rpm/min. (2) Temperature: Some samples (such as proteins, cells, etc.) will be destroyed in a high temperature environment, which requires the choice of frozen centrifuges, which have a rated temperature range. Centrifuge at high speed when the heat generated and centrifuge refrigeration system balance at a certain temperature (general frozen centrifuge samples need to be maintained at 3 ° C ~ 8 ° C), the specific amount can be achieved is also related to the rotor, such as a centrifuge rated temperature range of -10 ° C ~ 60 ° C, installed in the horizontal rotor can reach about 3 ° C when rotating, If it is an angular rotor, it may only reach about 7 ° C. This point should also consult the product sales personnel and the relevant technical personnel of the production plant in detail. (3) Capacity: how many sample tubes need to be centrifuged each time, how much capacity each sample tube needs, these factors determine the total capacity of a centrifuge, simply speaking, the total capacity of the centrifuge. 逐句对照  

What is the driving mode of the centrifuge according to the transmission device? What is the driving mode? As a Liangshan centrifuge recycling manufacturer, let Xiaobian take you to learn about it! 1) Two-layer motor drive That is, one motor drives the drum directly through the belt to rotate, and the other motor drives the helix through the reducer (differential). In order to reduce the voltage and current on each motor, reduce the thermal load of the motor and save power consumption, the drive is driven by two motors working together, and the two motors cooperate with each other when starting to supply the energy required to start, this drive type is called two-layer motor drive. 2) Single motor drive A centrifuge driven by a single motor is called a single motor drive. In this driving mode, a single motor drives the drum through the main pulley, and then the drum drives the input shaft of the planetary gear differential, and the output shaft with a differential speed drives the helix. At present, the horizontal sedimentation filter centrifuge is generally used in this way, and the single motor drive requires relatively high machining and assembly accuracy of the planetary gear differential, and the required transfer torque is larger. 3) Hydraulic drive Hydraulic drive This type of drum and screw are driven by a hydraulic system, with significant advantages: the hydraulic drive has a larger driving torque (2-3 times higher than the torque of the general motor drive), can go through a more concise speed difference control mode and obtain a lower speed difference.

How to correctly operate the reactor, as Liangshan recycling second-hand reactor manufacturers, how to correctly operate the reactor, let Xiaobian take you to learn! First, check the pipeline and valve related to the reactor, and ensure that the material is in line with the material conditions before feeding. Second, check whether the mixing motor, reducer, machine seal, etc. are normal, whether the reducer oil level is appropriate, and whether the cooling water of the machine seal is supplied normally. Third, to ensure that there is no abnormal situation, start mixing, according to the specified amount of input materials. The reactor of more than 10m3 or the reactor with stirring bottom bearing is strictly forbidden to run empty, and the stirring can be started only when the bottom bearing is immersed in the liquid level.