Since March 9, 2007, when the overall design plan for Sinopec Tianjin's 1 million-tonne ethylene and supporting project was approved by the headquarters, Tianjin Petrochemical strengthened its efforts in accordance with the various node goals identified by the headquarters' unified deployment and engineering construction coordination meeting. The cooperation of the relevant departments and design units of the headquarters has strived to improve the management level of the project construction and made every effort to promote the project construction process. In line with the principle of “strengthening leadership, enhancing strength, streamlining processes, setting goals, clarifying responsibilities, and conducting strict assessmentsâ€, in early 2007, Tianjin Petrochemical made major adjustments to its organizations and personnel. While strengthening the leadership of the supply of materials, the company also enriched the design force, and transferred 40 professional technicians from the original production preparation department and equipment department to the design department, and transferred professional personnel from the company's branches to enrich the design strength and make the design department staff from The original 18 people increased to 89 people, laying a good foundation for accelerating the project design progress. After the basic design has been fully developed, in order to better control investment and ensure the economy, rationality, quality, and style of the entire project, Tianjin Petrochemical has repeatedly organized the design unit to further improve the unified regulations, improve the design plan, and provide basic design work. To lay the foundation for the development. At the same time, numerous organizational conditions and docking and design review, clear design interface of each design unit, clear design management procedures, information transmission channels, for units that can not provide design conditions in time, multi-active coordination, and ensure the progress of the design.
At present, the basic design of the 19 new-build and retrofit installations of the refinery project has all been reviewed and approved by the headquarters. In addition to the 350,000 tons/year phenol/acetone plant, 8 sets of new equipment for ethylene engineering, the other 7 sets of equipment have already held a basic design review meeting and received approval from the headquarters. The thermal power project and the railway expansion and reconstruction project have completed the basic design review and have been approved by the headquarters.
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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