Slurry-bed reactor catalyst filtering assembly

Abstract

The invention provides a slurry-bed reactor catalyst filtering assembly and belongs to the field of chemical engineering. The filtering assembly comprises a lifting lug, a front-end flange, a metal membrane tube assembly, membrane tube and flange connection portions, a rear-end flange, a short connection portion and a small short-connection flange. A central membrane tube is arranged in the middle of the metal membrane tube assembly. An air exhausting pipeline is arranged in the central membrane tube. The metal membrane tube assembly is fixedly connected and assembled into four sections through the front-end flange, the membrane tube and flange connection portions and the rear-end flange. Metal membrane tube bodies at the two sides of each flange connection portion belong to the same through membrane tube. The metal membrane tube assembly used in the slurry-bed reactor catalyst filtering assembly is stable in shape, small in filtration resistance, high in permeability and resistant to corrosion and high temperature; and a metal powder filter element sintered through the slurry-bed reactor catalyst filtering assembly has the beneficial effects of being high in strength and high in filtration precision.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a catalyst filter assembly for a slurry bed reactor. Background technique [0002] The industrial production of BYD is mainly the alkyne aldehyde method (Reppe method). Acetylene and formaldehyde undergo alkyne aldehyde reaction under the condition of copper bismuth catalyst. The reaction system is a catalyst system composed of gas, liquid and solid three-phase. The main reaction equation is: [0003] . [0004] The reaction is an exothermic reaction, and the reaction mechanism is a surface reaction on the catalyst. The copper oxide in the catalyst is reduced to cuprous oxide under the action of formaldehyde, and then reacts with acetylene to form the intermediate cuprous acetylene. Formaldehyde and acetylene are respectively adsorbed on On the solid surface of cuprous acetylene, an addition nucleophilic reaction occurs to generate propynyl alcohol, which reacts with formaldeh...

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Problems solved by technology

Candle filter, also known as cloth bag filter, is composed of 26 sets of candle bag filter (10 sets of inner circle and 16 sets of outer circle). Because the filter cloth is a textile product, there are some natural inherent defects and defects. The disadvantage is that the bag filter has poor anti-pollution ability and durability. Generally, it needs to stop production to replace the bag after about 3 months of production. The maintenance period of the shutdown is about 12 days. Not only the maintenance cost is high, but also the intermittent production seriously affects the production capacity and affects the enterprise. economic benefits

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