Electrically heated stainless steel reactor

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Uses and characteristics of reaction kettles: A reaction kettle, in a broad sense, is a stainless steel container in which physical or chemical reactions take place. Through the proper design of its structure and selection of appropriate parameters, such containers can fulfill the requirements related to heating, evaporation, cooling, as well as high- and low-speed mixing. Consequently, the pressure requirements during the reaction process also result in different design requirements for the vessels. Production must be processed, inspected, and tested in strict accordance with the relevant standards. Stainless steel reaction vessels vary depending on different production processes and operating conditions; as a result, their design structure and parameters differ, meaning that their structural formats vary as well. They are therefore non-standard container devices. Stainless steel reaction vessels are widely used by industrial users in the petroleum, chemical, rubber, pesticide, dye, pharmaceutical, and food industries, as well as in various scientific research projects. They serve as containers for carrying out processes such as hydrolysis, neutralization, crystallization, distillation, evaporation, storage, hydrogenation, hydrocarbonation, polymerization, condensation, heating and mixing, and reactions at constant temperature. The stainless steel reactor is a comprehensive reaction vessel, whose structural design, functional features, and attached accessories are determined based on the reaction conditions. From the initial feeding to reaction and then discharging, the predefined reaction steps can be carried out with a high degree of automation, allowing for strict control over important parameters such as temperature, pressure, mechanical controls (stirring, ventilation, etc.), and the concentrations of reactants/products during the reaction process. The materials used for reaction vessels generally include carbon-manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel) alloys, and other composite materials. The reactor can be made of stainless steel materials such as SUS304 and SUS316L. Mixers come in anchor type, frame type, paddle type, turbine type, scraper type, and combined types. The rotating mechanism can be equipped with cycloidal pinwheel reducers, continuously variable speed reducers, or frequency-controlled speed regulators, allowing them to meet the specific reaction requirements of various materials. Sealing devices can adopt sealing structures such as mechanical seals and packing seals. Heating and cooling can be achieved using structures such as jackets, semi-tubes, coils, and Miller plates. The heating methods include steam, electric heating, and heat transfer oil, in order to meet the requirements of various working environments that demand resistance to acids, high temperatures, wear, and corrosion. It can be designed and manufactured according to the user’s process requirements. Operating procedures for external coil reaction vessels: Before starting up an external coil reaction vessel, 1. Check whether the vessel interior, mixer, rotating parts, auxiliary equipment, indicating instruments, safety valves, pipelines, and valves meet the safety requirements. 2. Check whether water, electricity, and gas meet safety requirements. During the startup of the external coil reactor, 1. The agitator of the external coil reactor should be turned on first before adding material; once there is no abnormal noise and the operation is normal, the material can be added to the reactor, with the amount added not exceeding the requirements specified in the process specifications. 2. Before opening the steam valve, first open the return valve, and then open the intake valve. The steam valve should be opened slowly to preheat the jacket, with pressure being increased gradually; the pressure inside the jacket must not exceed the specified value. 3. The steam valve and the cooling valve cannot be activated simultaneously; hitting or knocking on the steam pipeline is not allowed when steam is flowing through it. 4. When opening the cooling water valve, open the return water valve first, then the inlet water valve. The cooling water pressure must not be lower than 0.1 MPa, nor higher than 0.2 MPa. 5. For water-ring vacuum pumps, the pump should be started before water is supplied; when stopping the pump, it should be stopped first and then the water supply should be halted, and any water accumulated inside the pump must be drained. 6. Regularly check the operation of the external coil reactor; if any abnormalities are detected, stop the machine for maintenance. 7. When cleaning titanium epoxy (enameled) external coil reactors, do not use alkaline water to scrub them; care must be taken not to damage the enamel coating. Shutdown procedure for the external coil reactor: 1. Stop stirring, cut off the power supply, and close all valves. 2. When cleaning the pot, the mixer’s power must be turned off, a warning sign must be placed, and someone must be assigned to supervise the process. 3. The external coil reactor must undergo regular technical inspections in accordance with the requirements for pressure vessels; it shall not be put into operation if the inspections fail.