Features of the 70 m3 reactor compared to the 30 m3 reactor
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⑴The mid-process water injection process was implemented, which reduced the water-to-oil ratio at the beginning of the polymerization reaction and increased the feed amount of monomer. ⑵A sealed feeding method is used in all cases. All 30 m3 polymerization reactors use top feeding, whereas for the 70 m3 polymerization reactors, ionized water and dispersant are fed from the bottom of the reactor. ⑶By using isothermal feeding technology, the auxiliary time required for polymerization is reduced, and sticking to the reactor walls caused by temperature increases is avoided, which helps to improve production efficiency and the quality of PVC resin. ⑷The 70 m3 polymerization reactor is equipped with an emergency terminator system, ensuring safety and reliability. ⑸By using a sieve-plate stripping tower along with an optimized process flow, it is possible to do without automatic flushing equipment; it features low energy consumption, high desorption efficiency, and cost savings. ⑹Slurry stripping and wastewater stripping are employed to recover VCM as much as possible, which not only reduces the environmental pollution caused by VCM but also decreases raw material losses. ⑺The cyclone drying technology not only features a simple structure, but also advantages such as low energy consumption, high efficiency, and a high degree of automated control. ⑻The addition of automatic discharging and recycling procedures reduces the workload on operators and minimizes environmental pollution. ⑼The addition of a cold air feeding system has helped reduce energy consumption.
Except for point 3, the remaining technologies can be implemented on a 30m3 reactor. In fact, the warm water feeding technique is also being adopted by some manufacturers on 30m3 reactors, but it is not yet fully mature.
The technologies mentioned above were all implemented in our company’s 30m3 polymerization reactors in 2001. The only difference is that in 2006 we discontinued the cyclone drying system and switched to a horizontal two-stage fluidized bed designed by our own company. Moreover, the production capacity of our company’s 30m3 polymerization reactors is 11,000 tons per year, which is equivalent to 367 tons/m3.a.
It is recommended not to use kettles with a capacity below 70; nowadays, those with a capacity of over 100 are preferred
It is recommended to renovate the 70m3 tank. Add a kettle top condenser