Before the assembly of the B bus and the assembly of the pipeline, thorough rust removal must be carried out. There should be no burrs, rust, scales, and other debris in the pipe. The outer wall of the pipe should be coated with red dan and then painted with yellow alkyd. After the pipeline is connected, a hydrostatic test of 8 to 10 atmospheres is to be carried out to check the quality of its welds and joints, and then airtightness tests of 8 to 10 atmospheres are conducted to check for the occurrence of air leakage. Then install a grounding device that conducts static electricity between the bus bar and the acetylene pipe. Before using the pipeline, use nitrogen to drive off the air inside the acetylene pipeline, and prevent air from collecting at the end of the pipeline. A small hole can be vented at the end of the pipeline. When the pipeline is filled with nitrogen gas, the small hole is sealed with a plug. The acetylene gas is then supplied for use when the pipeline is filled with nitrogen.
Polyacrylamide (PAM) is a water-soluble polymer, which is insoluble in most organic solvents, has good flocculating properties, can reduce frictional resistance between liquids, Can be divided into non-ionic, anionic, cationic and amphoteric four types.
When PAM is used for flocculation, it is related to the surface properties of the species being flocculated, especially the potential, viscosity, turbidity, and pH of the suspension. The kinetic potential of the particle surface is the reason for particle inhibition. Can reduce the potential and condense.
Granular polyacrylamide flocculant cannot be directly added to sewage. It must be dissolved in water before use, and its aqueous solution are used to treat sewage.The water in which the particulate polymer is dissolved should be clean. Generally tap water is suitable for formulating polymer solutions. Strong ACID, strong alkali, high salt water is not suitable for preparation. Water at room temperature is ok, no necessary to heat. Dissolution is slow when the water temperature is below 5 ° C. Increasing the water temperature will accelerate the dissolution rate, but above 40 ° C will accelerate the degradation of the polymer and affect the use effect. The solution concentration is recommended to be 0.1% -0.3%.
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