Nozzle assembly for distributing fluidizing gas

Abstract

PURPOSE: A gas supply nozzle is provided to reduce the pressure falling through supply nozzle and to uniformly disperse the supplied gas to a fluidized bed by preventing the clog through a solid particle. CONSTITUTION: An injection nozzle comprises a gas inlet pipe(22) to be inserted in a nozzle head(23). A gas outlet(25) having an inclined angle of 30¯85degrees from a horizontal face is punched inside the nozzle head. An empty space having a large diameter and a higher height than the gas inlet pipe is formed above points to start the inclination of the gas outlet. A hole having the diameter corresponding to the diameter of the gas inlet is punched under the point to start the inclination of the gas outlet for inserting the gas inlet. A protrusion portion is formed to protrude and insert inside the nozzle head having the higher height than the points to start the inclination of the gas outlet.

Description

technical field [0001] This invention relates generally to nozzle assemblies for supplying fluidizing gas to fluidized bed reactors, and more particularly to such a nozzle assembly for supplying fluidizing gas to fluidized bed reactors which facilitates uniform Distributing the fluidizing gas in a fluidized bed reactor, and by means of it, preventing the backflow of solid particles in the bed into the windbox, thereby reducing the pressure drop, the backflow of solid particles would cause the nozzle assembly to be partially blocked, which would lead to This pressure drop. Background technique [0002] The fluidized bed includes solid particles that are well mixed with each other as a fluidizing medium, has advantages of superior heat and mass transfer rates, simple temperature control, and can be used as a reactor in various industrial fields. Specifically, when the fluidized bed is applied to the combustion chamber, it has the following advantages: high combustion efficien...

AI Technical Summary

Problems solved by technology

When the momentary pressure acting on the air nozzle part 20 drops, the air flow rate through the air nozzle part 20 increases; however, when the momentary pressure acting on the air nozzle part 20 is higher, the air flow rate then decreases

In addition, when the combustion chamber 1 operates under low load, the air flow rate through the exhaust hole is reduced

In addition, when the operation of the combustion furnace 1 is stopped, the air flow rate through the exhaust hole is rapidly reduced, and the solid particles flow back from the fluidized bed to the wind box through the air nozzle part 20, thus requiring maintenance and manpower costs to deal with the solid particles flowing back into the wind box The problem

[0012] in addition, figure 2 The problem with the conventional fluidized bed combustor in is that the air cannot be evenly distributed to the fluidized bed combustor because some of the dispersion nozzles installed on the distribution plate 13 are blocked by solid particles

However, the disadvantage of this patent is that when operating the furnace under low load or when the operation of the furnace is stopped, the sand as fluidizing medium is lost

However, the disadvantages of this patent are: the manufacturing cost of the nozzle assembly is high, and when the solid particles in the fluidized bed are located between the floating body and the air supply pipe, the floating body cannot move smoothly, so that the air cannot flow smoothly into the fluidized bed

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