Opposed type solid particle spraying distributor online coke cleaning device

Abstract

The invention relates to an opposed type solid particle spraying distributor online coke cleaning device. The device main solves the problem in the prior art of the hard removing of coke accumulated in gas cooler tubes. The device includes a solid particle storage tank, an ammonia oxidation reaction gas cooler, a solid particle unloading device, a solid particle spraying distributor and gas-solidseparators; the ammonia oxidation reaction gas cooler includes a hollow upper head and a heat exchange section distributed with the tubes; the upper part of the heat exchange section is provided witha protection plate; the solid particle spraying distributor is placed in the upper head along an axial direction; a solid particle distributor is arranged in an opposed manner at least by more than two nozzles which are in opposed arrangement or inclined at a certain angle; the inlet of inert gas communicates with the solid particle spraying distributor after being parallel with the outlet of thesolid particle storage tank; and the outlet of the cooler is provided with at least one gas-solid separator to recycle solid particles. Thus, the problem can be well solved, so that the device can beused for online coke removing industrial devices.

Description

technical field [0001] The invention relates to an online decoking device of an opposed solid particle jet distributor. technical background [0002] In the field of propylene ammoxidation to produce acrylonitrile, because the high-temperature reaction gas generated by the reaction contains easily polymerizable compounds such as acrylonitrile, hydrocyanic acid, and acrolein, the polymerization reaction is likely to occur during the cooling process of the reaction gas, and the resulting polymer and The catalyst dust brought out by the fluidized bed reactor adheres and accumulates in the tubes of the reaction gas cooler. With the prolongation of the operation time, the scale layer on the inner wall of the tubes gradually increases, and the channels in the tubes gradually decrease, resulting in the blockage of the tubes. , Increase pipeline resistance, when the scale layer reaches a certain thickness, the operating pressure of the reaction system will increase significantly, de...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that in the cooler of the ammoxidation production acrylonitrile reaction system existing in the prior art, the existing single-nozzle solid particle spray distributor has uneven particle distribution and sticky particles in some of the cooler tubes. It is difficult to remove the accumulated coke, which leads to an increase in channel resistance, an increase in the operating pressure of the reactor, a deterioration in the operating condition of the reaction system, a decrease in the catalyst reaction performance, an increase in device consumption, a shortened operation period, and an increase in operating costs due to non-recovery of solid particles To solve the problem, provide a new online coke cleaning device with opposed solid particle jet distributor

Images