Principle and Application of the Reactor
A reactor is a closed container used for carrying out chemical, physical, or biological reactions, and it is widely applied in fields such as chemical engineering, pharmaceuticals, petroleum, food, and materials science. It is a core device for realizing processes like mixing, reaction, synthesis, and polymerization in laboratory research and industrial production.

Basic Structure of the Reactor
1-Agitator, 2-Vessel Body, 3-Jacket, 4-Agitator Shaft, 5-Discharge Pipe, 6-Support, 7-Manhole, 8-Shaft Seal, 9-Transmission Device
Vessel Body
It is usually made of materials that are corrosion-resistant and pressure-resistant, such as stainless steel, Hastelloy alloy, fiber-reinforced plastic, enamel, etc.
It is mostly cylindrical in shape, and the top and bottom can be designed as flat covers, cones, or hemispheres.
Agitation System
It includes an electric motor, an agitator shaft, and agitator impellers (such as paddle type, anchor type, turbine type, etc.), which are used to mix materials and improve the reaction efficiency.
Some reactors are equipped with multi-layer agitation or special designs (such as magnetic agitation to avoid leakage).
Heating/Cooling System
Heating methods: electric heating, steam heating, heat-conducting oil circulation, microwave heating, etc.
Cooling methods: water cooling in the jacket, coil cooling, external circulation cooling, etc.
Sealing Device
Mechanical sealing or magnetic sealing is adopted to ensure the sealing performance of the reactor under high pressure, high temperature, or vacuum conditions.
Instrument and Control System
Temperature sensors, pressure gauges, pH meters, level gauges, etc., cooperate with the automation system to achieve precise control.

Classification of Reactors
According to the Operating Pressure
Atmospheric pressure reactor, low-pressure reactor, high-pressure reactor (such as the hydrogenation reactor).
According to the Temperature Range
Low-temperature reactor (requiring a refrigeration system), medium-temperature reactor, high-temperature reactor (such as high-temperature and high-pressure synthesis).
According to the Material
Stainless steel reactor, glass-lined reactor (resistant to acids and alkalis), titanium alloy reactor (corrosion-resistant), glass reactor (for small-scale laboratory use).
According to the Reaction Type
Polymerization reactor, fermentation reactor (bioreactor), photochemical reactor, microwave reactor, etc.
Main Application Fields
Chemical Industry
Organic synthesis (such as esterification, nitration), catalytic reaction, polymerization reaction (such as the production of polyethylene).
Pharmaceutical Industry
Synthesis of pharmaceutical intermediates, crystallization, hydrogenation reaction, sterile fermentation (such as the production of antibiotics).
Petroleum Industry
Crude oil cracking, hydrotreating, synthesis of lubricating oils.
Food Industry
Fermentation (such as soy sauce, alcohol), synthesis of food additives.
New Energy and Materials
Synthesis of lithium battery materials, preparation of nanomaterials, research and development of fuel cell catalysts.
Operation Precautions
Safety Regulations
Strictly check the sealing performance to prevent leakage (especially for toxic, flammable, and explosive substances).
Install overpressure protection devices such as safety valves and bursting discs.
Temperature and Pressure Control
Avoid over-temperature and overpressure, and some reactions require strict control of the heating/cooling rate.
Material Compatibility
Ensure that the reactants, catalysts, and the material of the vessel body do not cause corrosion or side reactions.
Cleaning and Maintenance
Clean regularly to prevent residues from affecting subsequent reactions; check the wear conditions of the agitation system and seals.
Key Points for Selection
Reaction Conditions: Clearly define the pressure, temperature, and properties of the reactants (such as corrosiveness, viscosity, etc.).
Volume Requirements: Laboratory level (0.1L - 50L) or industrial level (hundreds of liters to thousands of liters).
Material Selection: Select according to the requirements of corrosiveness and cleanliness (for example, 316L stainless steel is required for the pharmaceutical industry).
Agitation Requirements: High-viscosity materials require agitation with strong shearing force, and gas-liquid reactions require a gas distributor.
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