Biological fluidized bed reactor

Abstract

The invention discloses a biological fluidized bed reactor. The structure comprises a high temperature prevention heating mechanism, a first jacketed straight pipe, a top cover, a feeding pipe, a sealing device, a control device, a manhole, a kettle bottom, a second jacketed straight pipe and a discharging pipe, wherein the kettle bottom is fixedly welded to the bottom end of the high temperatureprevention heating mechanism, the kettle bottom and the high temperature prevention heating mechanism are formed integrally, the discharging pipe is fixedly arranged in the middle of the bottom end ofthe high temperature prevention heating mechanism, the inner portions of the discharging pipe and high temperature prevention heating mechanism are communicated with each other, and the first jacketed straight pipe is in the same size as the second jacketed straight pipe. According to the biological fluidized bed reactor, on one hand, the temperature control is carried out, on the other hand, ammoxidation is carried out, reaction gas, containing acrylonitrile, generated in the reaction is separated from a catalyst by using a cyclone separator to become reaction gas containing unreacted ammonia, acrylic acid generated as a by-product and other impurities and extracted from a product extraction pipe, then the reaction gas is sent into an absorption separation tower for ammonia and an purification tower for acrylonitrile for purification in sequence after being cooled by a heat exchanger, thereby the finished acrylonitrile is obtained.

Description

technical field [0001] The invention relates to a biological fluidized bed reactor, which belongs to the field of fluidized bed reactors. Background technique [0002] Traditional fuel ethanol wastewater is generally treated with the "first-level anaerobic + aerobic" process after solid-liquid separation, but the traditional process has high pre-treatment costs, large investment, and instability, which brings inconvenience to subsequent anaerobic treatment. It is easy to impact the system. In addition, due to the high suspended solid content of this type of wastewater, there are disadvantages in the application of high-efficiency anaerobic reactors UASB and EGSB, and there are clogging problems caused by cassava and other residues entering the treatment system. Large-scale fully mixed anaerobic reactors Fermentation is not easy to stir evenly, sludge loss problem (digested sludge is not easy to settle and recover), etc. At the same time, the viscosity of the first-stage anae...

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a biological fluidized bed reactor to improve the existing fluidized bed reactor, which cannot perform heat removal smoothly, and produces hot spots in the reactor, resulting in the accumulation of catalyst particles. Deterioration of the material of the reactor, corrosion of the material of the nozzle, etc., which reduces the yield of the target reaction, etc., have adverse effects on the gas phase oxidation reaction.

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