Tubular reactor Consists of a hollow tube or a filled tube with a large length-diameter ratio, and can be used for realizing a gas-phase reaction and a liquid-phase reaction. Expand the full text Performance characteristics: 1. Since the residence time of the reactant molecules in the reactor is equal, the reactant concentration and chemical reaction rate at any point in the reactor do not change with time, but only with the length of the tube. 2. Tubular reactor has small volume,hemp extraction centrifuge, large specific surface and large heat transfer area per unit volume, which is especially suitable for reactions with large thermal effect. 3. Because the reaction speed and flow rate of the reactants in the tubular reactor are fast, its production capacity is high. And 4, the tubular reactor is suitable for large-scale and continuous chemical production. 5. Compared with the tank reactor, the backmixing is smaller, and the flow pattern of the fluid in the tube is close to the ideal fluid under the condition of lower flow rate. 6. Tubular reactor is suitable for both liquid phase reaction and gas phase reaction. he diameter of the U-tube is large, and the residence time of the material is increased, so that the U-tube can be applied to a reaction with a slow reaction rate. Multi-tube parallel tubular reactor 5 Tubular reactors with multiple tubes in parallel are generally used for gas-solid phase reactions, for example,wiped film evaporator, gas-phase hydrogen chloride and acetylene react in a reactor with multiple tubes in parallel filled with a solid phase catalyst to produce vinyl chloride, and gas-phase nitrogen and hydrogen mixture is used to synthesize ammonia in a reactor with multiple tubes connected in parallel filled with a solid phase iron catalyst. II. Kettle-type reactor It is composed of a cylindrical container with a small ratio of length to diameter, usually equipped with a mechanical or pneumatic stirring device, and can be used in liquid-phase single-phase reaction process and liquid-liquid phase, gas-liquidrging and discharging are required, and the product quality is not easy to stabilize. However, some reaction processes, such as some fermentation reactions and polymerization reactions, are still difficult to achieve continuous production, and batch reactors are still used so far. Continuous kettle 2 Continuous kettle reactor, or continuous kettle Stirred tank reactor 3 Stirred tank reactor has vertical vessel central stirring, eccentric stirring, inclined stirring, horizontal vessel stirring and other types. Among them, the stirred tank reactor centered in a vertical vessel is the most typical one. Multi-stage series reaction kettle 4 III. Tower Reactor Tower equipment for realizing gas-liquid phase or liquid-liquid phase reaction process, including packed tower, plate tower, bubble tower, jacketed glass reactor ,rotovap distillation, etc. Bubble column reactor 1 Bubble column reactor is widely used in medium-speed, slow-speed reactions and reactions with large heat release, in which liquid phase also participates in the reaction. For example, the oxidation reaction of various organic compounds, the chlorination reaction of various paraffins and aromatic hydrocarbons, various biochemical reactions, aeration oxidation of sewage treatment and carrough the gap of the packing layer in countercurrent with the liquid. On the surface of the packing, the gas and liquid are in close contact for mass transfer. The packed column is a continuous contact gas-liquid mass transfer equipment, and the composition of the two phases changes continuously along the height of the column. Under normal operating conditions, the gas phase is the continuous phase, and the liquid phase is the dispersed phase. Plate column reactor 3 The liquid of the tray column reactor is a continuous phase and the gas is a dispersed phase, and a chemical reaction is carried out by contacting the liquid phase on the tray by dispersing the gas phase into small bubbles through the tray. The plate column reactor is suitable for fast and medium speed reactions. The use of multiple plates minimizes axial back mixing and allows operation at very small liquid flow rates, enabling very high liquid phase conversions to be achieved directly in a single column. At the same time, the gas-liquid mass transfer coefficient of plate column reactor is large, so cooling or heating elements can be installed on the plate to meet the rolids are usually granular, with a particle size of about 2 to 15 mm, and are packed into a bed of a certain height (or thickness). The bed is stationary and the fluid passes through the bed to react. It differs from fluidized bed reactors and moving bed reactors in that the solid particles are at rest. Fixed-bed reactors are mainly used to realize gas-solid catalytic reactions, such as ammonia synthesis tower, sulfur dioxide catalytic oxidizer, hydrocarbon steam reformer, etc. When used for gas-solid or liquid-solid non-catalytic reactions, the bed is filled with solid reactants. Trickle bed reactors can also be classified as fixed bed reactors, in which the gas and liquid phases flow downward through the  and make a contribution to the cause of green environmental protection! (Disclaimer: This article only represents the views of the author,cbd crystallization equipment, and does not represent the position of this public account. If there are intellectual property disputes, contributions and cooperation matters, please contact) Return to Sohu to see more Responsible Editor:. toptiontech.com