How to control exothermic reactions in reaction vessels
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In our company’s production process, several steps involve reactions that release large amounts of heat; how can this be controlled, for example when adding sulfuric acid? Rapid addition of such substances can lead to intense heat generation, which may cause damage to the equipment
It is recommended to study carefully documents such as the Safety Supervision Administration’s “List of Key Hazardous Chemical Processes Subject to Strict Supervision,” “Safety Control Requirements, Key Monitoring Parameters, and Recommended Control Plans for Key Hazardous Chemical Processes Subject to Strict Supervision,” and the “Notice from the Safety Supervision Administration on the Publication of the List of Key Hazardous Chemical Processes Subject to Strict Supervision” (No. An Jian Zong Guan San 116), as well as the regulations formulated by various provinces based on these documents. The situation described by the poster likely involves oxidation or sulfonation processes; you can take a look at the recommended control schemes.
The reaction kettle can utilize step-controlled jacket water temperature.
Automatic control is possible, using the temperature inside the tank to control the feeding valve!
It depends on your process. If it falls within the category of fifteen hazardous processes or similar, it is recommended that you install an automatic control system that uses the reaction temperature T in conjunction with the feeding rate V or feeding time t for interlocking purposes. If it does not fall under the fifteen hazardous processes and is produced in batches, a homemade dosing system along with a temperature display can be utilized. It is also recommended that you strengthen management, carry out proper debugging, and develop a feeding and reaction temperature control method suitable for your facility’s production needs.
Interlocked control of reactor temperature and feed flow rate
According to **relevant regulations, an automatic control system or interlock protection system must be installed! If necessary, our company can provide a range of services including system design and development and implementation! QQ:709274284
As long as your employer has the funds, an automated control system can be implemented, regardless of whether it falls under the first 15 high-risk processes identified by the State Administration of Work Safety. Interlock the temperature inside the reactor with the feeding rate, feeding time, etc. This control is very simple.
Reply 1# xx*ngang: For temperature control, jacket cooling can be considered, but what’s most important is controlling the reaction rate. It is recommended to use interlocked control based on temperature or flow rate, as this will be safer.
It is estimated that your reaction takes place in a sulfonation process. I wonder if your reactor has a jacket; if it does, you can control the reaction temperature by regulating the amount of cooling medium used in the jacket. However, what’s most important is controlling the reaction rate. It is recommended to use interlocked control based on temperature or flow rate. Most reactors come equipped with control systems, and it would be best to install a PLC to enable automatic temperature control, which is more accurate than manual control.
Reply to 10# nanshansong: To be honest. 1. Control the feeding speed. 2. Cooling by the jacket or coil of the reactor. However, it is necessary to prevent pressure buildup during the feeding process.