The use of long axis pumps has increased our productivity and reduced the workload of our workers. However, in their work, the user is more concerned that in the work, the long-axis pump will have a fault occurs, then the common long-axis pump fault what? Is there a fault solution? I believe these are all users want very much to understand the information. These questions will be analyzed next. Long axis pump fault solution 1, the cause can not start up: Long axis pump vibration can not rise due to motor or power supply system failure, rotor parts have foreign bodies, the bearings are stuck, starting conditions are not met. The solution is to repair the motor or power supply system, clean rotor parts, clean or replace the bearings, check the conditions to be met lack of flow or no water. 2, the lack of flow or no water reasons: generally suction side or outlet side of the impeller clogging debris, seal ring wear too much, impeller damage, steering is not, accommodation is too low, deep enough to inhale the air. Solution: Clean the screen, impeller, guide vane body, discharge pipe, valve system; replace damaged parts; correct steering; measure voltage, frequency, check the motor; increase the suction water level. 3, the long axis of abnormal vibration and vibration noise solution: need to increase the long axis pump suction water level or off the gate valve, the impeller to adjust the static balance, the correction of the concentricity of the shaft, than the straight shaft, tighten the anchor bolts, replace the bearing Guide bearing replacement. Long axis pump is used to transport clean water and contains some solid particles of sewage, with corrosive industrial waste water and other harsh material equipment, it is in sewage treatment, primary water treatment, metallurgical steel industry, mining, power plants, municipal engineering, irrigation and other farmland Areas play an important role. It is believed that long axis pump failure problems can have a significant impact on long axis pump usage and accelerating the study of these failures will have a very positive effect on the future of long axis pumps.
Paper dyeing process, the object is to dye the role of paper fibers. Mechanism of different Dyes with different pulp, wood is known as basic dyes great affinity, suitable for dyeing pulp lignin content; pulp surface with a strong negative charge, then the Direct Dyes hardly adsorbed ions , with it to reduce the surface charge, the dye near the fiber surface is fixed. Such non-electrostatic adsorption caused, bauxite is commonly used in papermaking dye retention agent, because the majority of paper dyes are anionic, cationic aluminum compound and anionic dye-forming cation may be precipitated and adsorbed on the fiber surface which is to retain this mechanism occurs at pH 4.0-5.2, then the charge density of the aluminum ions is high, the charge is stronger.
Dyes commonly used in the paper coating colored paper, the dye and the paper fibers by covalent bond, ionic bond between, with the key, and molecular hydrogen binding forces, which depends on the color fastness of adhesion strength, exactly in what based combination, depending on the structure of the dye molecule.
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Paper Dyes, Paper Dyes Applications, Paper Dyes Industries
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