American Parr fluidized bed reactor Chinese sample

Application field

The fluidized bed reactor produced by Parr is widely used in chemical processes. In this reactor, the upward airflow holds up the solid particles and puts them in a suspended motion state, which facilitates the continuous feeding and discharging of the solid catalyst, helps the transfer and replacement of the solid layer, and at the same time can realize the high pass of the reaction system Increase the conversion rate. The main commercial applications of fluidized bed technology are mostly gas-solid two-phase systems, including Fischer-Tropsch synthesis reactions, catalytic cracking reactions of hydrocarbons and macromolecular petroleum components.

Characteristics of fluidized bed reactor Compared with fixed bed (packed bed) reactor, fluidized bed has significant advantages: such as uniform temperature control and no hot spots, it can reduce by-products caused by uneven temperature to improve product The quality and the conversion rate of specific products are conducive to the uniform distribution of the catalyst and increase the contact surface of the catalyst and raw materials, improve the activity of the catalyst and extend the service life of the catalyst. Another feature of the reactor is its very good thermal conductivity and homogeneity. The fluidized bed can achieve good mixing of solids and suspended fluids.

The main components of the fluidized bed reactor

1) Gas control-mixing subsystem, used to mix gases and realize the presetting and control of the flow rate of gas raw materials into the bottom of the reactor.

2) The reactor is about 1m long and has an inner diameter of 2.5cm. The lower part of the reactor is equipped with an easily removable porous metal gas filter plate. The top of the reactor is widened to form a fluidized bed separation zone to separate the catalyst particles from the product. The flexible heating jacket can separately heat the main reactor and the separation zone, and the multi-point thermocouple can measure the temperature at different points in the reactor.

3) The heated cyclone separator or filter acts directly downstream of the reactor and is used to capture the powder generated due to particle friction.

4) The reaction product is cooled by the condenser and collected in a product receiver with a volume of 600 mL.

5) The pressure in the system is adjusted by the back pressure valve.

6) All functions and parameters of the system are controlled and maintained by the Parr 4871 process controller.