FR2513899A1 - METHOD FOR INVERTING GAS CURRENT FLOW SENSE - Google Patents

Abstract

THE INVENTION RELATES TO A PROCESS FOR AVOIDING AGGLOMERATION OF FLUID AND OR VISCOUS PARTICLES OF FUEL ASH CONTAINED IN A TREATED HOT GAS, COMING FROM A GASING PROCESS AND SUBMITTED, IN A FIXED RETAINING ORGAN 2, FOLLOWING AN ASCENDER 2 OF A DIRECTION OF FLOW REVERSE, PROCESS IN WHICH THE SPEED OF THE GAS CURRENT TREATED AND OF THE SAID PARTICLES IT CONTAINS IS LOWERED, BEFORE REACHING THE FIXED RETAINER 2, BELOW THE DESCENDING SPEED OF THE SAID PARTICLES.

Description

The present invention relates to a method for emp 9 oher

  the agglomeration of fluid and / or viscous particles of fuel ash contained in a treated hot gas, originating from a gasification process and subjected, in a fixed retention member, to an ascent entrainment followed by a reversal of flow direction On knows that in the bent parts of the type pipes;

  usual, it occurs, before the reversal of flow direction-

  stream of treated gas containing fluid particles

  ides and / or viscous fuel ash, de-

  p 8 ts adherents which can inconvenience and disturb,

  The aim of the present invention is to carry out a process

  making it possible to prevent, to a large extent, the parties

  fluid and / or viscous cules of fuel ash,

  driven by a gas undergoing a gasification treatment

  cation, directed against a fixed retaining member then subjected to a reversal of flow direction, to form deposits

  adherents in the contact zone of this gas with said or-

  gane r 6 tempter This object is achieved, in accordance with the invention, by means

  a process in which the speed of the gas stream processed

  fluid and / or viscous ash particles

  of fuel it contains is lowered before reaching

  dre the fixed retention member, below the speed of-

  centenary of said particles In this way, said particles descend by their own weight and therefore reach the fixed retention member only after reversing the direction of flow Deposits

  members who, thanks to this provision in accordance with the

  vention, occur only outside the impact zone on the fixed retention member, can therefore be easily eliminated by means of impact or percussion devices and evacuated from the device reversing the direction of gas flow , thus preventing large fragments of agglomerates from falling back into the cou-

  gasification and disrupt its operation.

  In addition, the slowing of the gas flow produces a

  mixture the result of which will be a balancing of the time profile

  temperature of the treated gas after its reversal of flow direction.

  The invention is described below in detail with reference to a preferred, non-limiting example of embodiment shown in the accompanying drawing, the single figure of which is an axial section of a

  reversing device, with fixed retention member, in accordance with the invention

  tion. The stream of hot treated gas 1, coming from a

  gasification and transporting fluid particles and / or vis-

  ashes of fuel ash, rises, at a given speed v 1, towards the fixed retention member 2 La 4 sque le

  stream of treated gas, leaving the inlet pipe 3, penetrates

  Being in enclosure 4, its speed decreases, due to the increase

  tation of the free flow section, at the speed v 2 lower than the speed v of descent of said particles These, again

  fluids and / or viscous, descend into the device, are distant

  of the impact zone 5 of the fixed retention member 2 by the

  deflected gas stream 1, and can agglomerate there.

  These adherent deposits can be detached from the fixed retaining member by means of impact or percussion devices 6, and can be removed 5 S dt i'app Qreii deflector by a pin

  inclined 7 or other suitable devices.

Claims (1)

REVENDICA TION   Method for preventing agglomeration of fluid and / or viscous particles of fuel ash contained in a gas   hot treated (V 1, from a gasification process and self J-   put, in-a fixed retention member (2), ascentisrn-   followed by an inversion of flow direction, characterized in that the speed v 1 of the stream of treated gas llet of the fluid and / or viscous particles of fuel ash which it contains is lowered v 2, before reaching the fixed retaining member 2 ′, in   below the descentional speed vs said particles -