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Oxychlorination reactor flow analysis and assessment of quality


Significant. 6.3HC1 conversion rate of flow of the quality of the final N ~ JJJ is the conversion rate of HC1. When other conditions such as load, mole ratio, reaction temperature Dengjun meet the operational requirements, and HCI conversion rate is still less than the design flow of the quality indicators that have problems. 6.4 of entrained catalyst particles under normal circumstances, entrainment of catalyst particles is almost negligible, with only a trace amount of diameter less than 10 \will be rapidly increased dramatically, and in severe reactor outlet gas quench tower water tower pink green, the four areas constitute the oxychlorination reactor fluidization quality comprehensive assessment system, in fact, four aspects of each other impact of restraining each other,[link widoczny dla zalogowanych], when the flow of quality deterioration,[link widoczny dla zalogowanych], often manifested in several ways comprehensive. 7 fluidized oxychlorination reaction is good or bad adjustment, the key is the quality of bed fluidization quality, in accordance with the above analysis and industry operating experience, can be summed up when the flow of the quality deterioration of adjustment steps: (1) to maintain the original production load, adjust the process parameters �� Adjustment reaction temperature. appropriate to reduce the vertical tubes inside the reactor pressure hot water circulation, making the reactor Tube wall on both sides of the vertical temperature difference �� T increases, heat transfer, pay attention to the vertical tubes inside the reactor pressure hot water circulation can not be less than 5kg-m one. to prevent water condensation reaction of the wall has resulted in corrosion �� to improve the feed molar ratio of components. that is, raising O molar ratio. improve the feeding quantity 0 HCI conversion rate of increase is beneficial, while the burning rate of CH there will be some increase (2) reduce the load of the working load of the reactor regulating gradually reduced. and continue to adjust the vertical tubes inside the reactor pressure and circulating hot water molar ratio of feed components, until the response to normal, and to keep the oxygen content of the feed molar ratio higher than under normal operating period of time, until the reaction is normal. namely: the reaction at low load operation, and gradually restore the mobility and activity of the catalyst, and then later go negative Heti (3) Parking, air-way operation when the implementation of the above two steps fail to improve the quality of the reactor when the flow of , that the situation has very serious, must stop all feeding, changing one-way operation by air. using high oxygen content in the air re-activation of catalyst, the main observation at this time whether the normal pressure distribution plate. If you can not return to normal , you can determine the distribution of bed or larger board has been blocked, a partial death bed, to be checked inside the reactor, cleaning distributor, baffle, etc. fluidized oxychlorination reaction steps can be adjusted in Figure 7 indicate : Circle 7, 8 Summary diagram of fluidized adjustment steps of ethylene oxychlorination this baffle the flow of the fluidized bed of a comprehensive quality analysis and research, are the following conclusions: (1) the existence of the bezel makes the vinyl oxychlorination fluidized bed reactor, the reaction temperature and the two appear uneven distribution of the axial temperature distribution of the peak temperature inhomogeneity such as the increase of the production load. temperature distribution of the \unique phenomenon of a fluidized bed reactor, (2) in the normal flow of the state, we can use type (3.1) W = �� PlA + w. to estimate the catalyst bed. (3) of the reactor flow of good quality One of the necessary conditions: the gas through the gas distribution plate speed is greater than 0.28-0.30n1 �� s ~ (4) entrainment of catalyst particles can be measured through the reactor to dilute the temperature of the phase space of indirect qualitative judgments the catalyst particle is the main heat carrier in the reaction temperature, heat transfer under conditions of little change,[link widoczny dla zalogowanych], the more dilute the temperature of the phase space providers, said particles entrained more. (5) a comprehensive assessment system includes fluidized bed and distributor pressure drop, axial temperature distribution, HCI conversion rate,[link widoczny dla zalogowanych], particle entrainment, etc.,[link widoczny dla zalogowanych], they influence each other, contain each other, when the flow of quality deterioration, often manifested in several ways comprehensive. (6) According to the theory of and actual production experience, summed up the operation to improve the fluidization adjustment steps (Figure 7).
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