Aftertreatment arrangement and method for the aftertreatment of at least gases downstream of a fluid bed gasification system, and logic unit and use
The invention relates to an aftertreatment arrangement ( 1.0 ) for the aftertreatment of at least gases downstream of a fluidized bed gasification process, in particular downstream of an HTW gasifier ( 1 ) of a pressure-loaded fluidized bed gasification process, having a particle separation unit ( 2; 11 ) which can be arranged downstream of the fluidized bed gasification process and upstream of a gas cooler ( 3 ) that can be used for the further aftertreatment of the gases, wherein the aftertreatment arrangement comprises an intermediate cooling unit ( 12 ) which can be arranged downstream of the fluidized bed gasification process and upstream of the particle separation unit ( 11 ), having a return (B 1 ) for gasification steam (B) that can be coupled to the fluidized bed gasification process. Furthermore, the invention relates to a method for the aftertreatment of at least gases downstream of a fluidized bed gasification process as well as the use of an intermediate cooling unit.
1. A method for the aftertreatment of at least gases downstream of a fluidized bed gasification process, downstream of an HTW gasifier ( 1 ) of a pressure-loaded fluidized bed gasification process, comprising a particle separation process ( 11 ) which is configured to be arranged downstream of the HTW gasifier ( 1 ) of the fluidized bed gasification process and upstream of a gas cooler ( 3 ) that is configured to be used for the further aftertreatment of the gases, wherein particle separation ( 11 ) is carried out by means of a cyclone candle filter unit;
characterized in that gas from the fluidized bed gasification process is subjected to intermediate cooling ( 12 ) directly upstream from the particle separation process ( 11 ) and directly downstream of the HTW gasifier ( 1 ) of the fluidized bed gasification process, combined with a return of gasification steam (B) from the intermediate cooling back to the fluidized bed gasification process; and
wherein the intermediate cooling occurs to approximately 650° C.
2. The method according to claim 1 , wherein the intermediate cooling ( 12 ) occurs to 650° C., optionally from approximately 950° C.
3. The method according to claim 1 , wherein dust (A) is returned from the particle separation process ( 11 ) directly into the fluidized bed gasification process, optionally into the HTW gasifier ( 1 ).
4. The method according to claim 1 , wherein an oxidation of the bottom product occurs on a discharge side of the fluidized bed gasification process; and/or wherein bottom product cooling ( 14 ) occurs on the discharge side of the fluidized bed gasification process, optionally on the discharge side of the oxidation ( 13 ) of the bottom product.
5. The method according to claim 1 , wherein the gas downstream from the fluidized bed gasification process is subjected first to intermediate cooling ( 12 ), then particle separation ( 11 ) and then the gas cooling ( 3 ) in sequence.
6. The method according to claim 1 , wherein synthesis gas (G) is produced by gas being guided out of the fluidized bed gasification process downstream of the gas cooling ( 3 ) through at least one water scrubbing unit ( 5 ), one shift unit ( 6 ) and one desulfurization unit ( 7 ).
7. A logic unit ( 20 ) set up for controlling a method according to claim 1 , wherein the logic unit is coupled to an intermediate cooling unit ( 12 ) and is set up for regulating the cooling of the gases, optionally in a range between 950° C. and 650° C., and is set up for regulating a gas supply to a particle separation unit or also to a bottom product oxidation chamber, optionally for regulating at least a volume flow.
8. The method according to claim 1 , wherein the particle separation process ( 11 ) is a single particle separation process ( 11 ).
9. A method for the aftertreatment of at least gases downstream of a fluidized bed gasification process, downstream of an HTW gasifier ( 1 ) of a pressure-loaded fluidized bed gasification process, comprising a particle separation process ( 11 ) which is configured to be arranged downstream of the HTW gasifier ( 1 ) of the fluidized bed gasification process and upstream of a gas cooler ( 3 ) that is configured to be used for the further aftertreatment of the gases, wherein particle separation ( 11 ) is carried out by means of a cyclone candle filter unit;
characterized in that gas from the fluidized bed gasification process is subjected to intermediate cooling ( 12 ) directly upstream from the particle separation process ( 11 ) and directly downstream of the HTW gasifier ( 1 ) of the fluidized bed gasification process, combined with a return of gasification steam (B) from the intermediate cooling back to the fluidized bed gasification process; and
wherein the intermediate cooling occurs to within a temperature range of 640° C. to 660° C.