Project modifications regarding sulfonation, chlorination, nitration, and high-risk production processes
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Pay close attention to monitoring the process parameters: temperature and pressure in the chlorination reactor； Stirring speed of chlorination reactor ； Ratio of reaction materials ； Chlorinating agent feed flow rate ； Temperature, pressure, flow rate, etc. of the cooling medium in the cooling system ； Chlorine impurity content (water, hydrogen, oxygen, nitrogen trichloride, etc.) ； Composition of chlorination reaction exhaust gases, etc. Basic requirements for safety control: Alarm and interlock functions for the temperature and pressure in the reactor ； Proportional control and interlock of reaction materials ； Stable control of stirring ； Feed buffer ； Emergency feed cut-off system ； Emergency cooling system ； Safety relief system ； Chlorine absorption and neutralization system in accident conditions ； Flammable and toxic gas detection and alarm devices, etc. A suitable control approach is to establish an interlock relationship between the temperature and pressure inside the chlorination reactor, as well as the mixing action within the reactor, the flow rate of the chlorinating agent, and the inlet valve for the cooling water in the reactor’s jacket; furthermore, an emergency shutdown system should be installed. Safety devices, including safety valves, high-pressure valves, emergency vent valves, level gauges, check valves, and emergency shut-off devices. The above are the requirements for the chlorination modification. The workshop managed by this foreman needs to be modified as required by higher-level management; the existing equipment hardly has any interlock functions, and now DCS control is required. Based on these requirements, is it necessary to install a separate emergency shutdown system? If so, how should it be designed? Are redundant measures also needed? Should the emergency shutdown system and the DCS control system not share instruments? Would that result in high costs? This chemical plant requires minimizing renovation costs, as long as the requirements are met. And how should these interlocks be designed? I need a plan first; please help me solve this, expert
After reviewing your manufacturing process, I see some similarities with those of our company; I’d like to offer a few suggestions……
Damn, I’m sorry – I’m in a different location, and there’s a problem with the keyboard in the internet cafe. I’ll briefly explain how to set it up: DCS control works fine; it’s possible to implement this. As for the emergency shutdown system, if funding doesn’t allow for an independent shutdown system, it can be set up in a way that is compatible with DCS. There is no need to set up redundancy; just configure the interlock control directly within the DCS. The keyboard isn’t user-friendly – you can call me, or send me a private message with your phone number……
With an insufficient budget, redundancy certainly cannot be considered; existing equipment must be utilized. For the security-related parts, check the relevant security specifications