Slurry bubble column reactor with needle type fin column tube bundle

Abstract

The invention discloses a slurry state bubble tower reactor with a needle type fin tube bundle. A plurality of vertical heat exchange tubes are arranged in the cylindrical reactor; the upper ends of the vertical heat exchange tubes are connected with a liquid distributor fixed below a container, while the upper ends are connected with a liquid collector fixed above the container; the outer walls of the heat exchange tubes are provided with horizontal needle type fins; the number of the needle fins arranged on the heat exchange tubes is 80-800 every meter, the diameter of the needle type fins is -10 mm, and the length of the needle type fins is 10 125 mm. The heat exchange tubes with the needle type fins are adopted to increase the heat exchange area and strength the heat exchange capability of the reactor on one hand, and on the other hand, the needle type fins distributed on the outer walls of the heat exchange tubes can obstruct the flowing of sizing agents and bubbles in the tower, can suppress the flow steeping effect caused by the vertical heat exchange tubes, improve the flow rate distribution of a slurry bed and achieve double functions of reinforcing heat transfer and improving the flow.

Description

technical field [0001] The invention relates to a slurry bubble column reactor with pin-shaped finned tube bundles, which is suitable for the gas-liquid / gas-liquid-solid multiphase strong exothermic / endothermic reaction process in the chemical production process. Background technique [0002] Gas-liquid bubble column or gas-liquid-solid three-phase bubble reactor (also known as slurry bed reactor) is a reaction device widely used in many fields such as chemical industry, energy, environment, biochemistry, etc., such as Fischer-Tropsch synthesis, Hydrogenation liquefaction, carbonylation, oxidation, halogenation, fermentation, gas absorption and other processes. There are two main problems in the design and scale-up of the slurry bed reactor, one is heat removal, and the other is back mixing. For the heat transfer problem of the reactor, the method of installing vertical tubes in the reactor is often used in industrial slurry bed reactors to enhance heat transfer. However, i...

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Problems solved by technology

However, the flow in the bubble column is a multiphase flow driven by the buoyancy of the bubbles. The central area of ​​the tower is upward and the near wall area is downward. Installing pin fins on the heat exchange tubes will bring two contradictory effects: The heat exchange area of ​​the tubes is increased, which is conducive to improving the heat exchange efficiency. On the one hand, it will reduce the flow rate in the tower and reduce the heat transfer coefficient of the tubes.

Therefore, as a new type of reactor, it is necessary to take into account both flow control and heat exchange enhancement effects in the slurry bed using pin-shaped finned tube heat exchange to obtain the best overall effect. However, in the current literature and patents There are no research and technical reports in this area

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