Gas distributor for bubble column reactor

Patent metadata

Field	Value
Publication number	US-12427491-B2
Application number	US-202117799226-A
Country	US
Kind code	B2
Filing date	Feb 12, 2021
Priority date	Feb 12, 2020
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

Bubble column reactor assemblies are provided, an assembly ( 100 ) comprising: a reactor vessel ( 102 ) comprising a bottom end and a top end. A pre-distributor plate ( 114 ) having a bottom surface and a top surface, disposed in the 5 reactor vessel ( 102 ) such that the bottom surface faces the bottom end of the reactor vessel ( 102 ). A gas distributor ( 106 ) is disposed below the pre-distributor plate ( 114 ) to receive and inject gas into a liquid prior to distribution of gas and liquid by the pre-distributor plate ( 114 ). The gas distributor ( 106 ) comprises: a common manifold ( 108 ) and a plurality of ring-shaped pipes disposed along a length of the 10 common manifold ( 108 ); and a plurality of nozzles disposed along an outer circumference of each ring-shaped pipe of the plurality of ring-shaped pipes to inject gas and create vortexes for uniform distribution of the gas in the liquid.

First claim

We claim:

1. A bubble column reactor assembly ( 100 ) comprising:
a reactor vessel ( 102 ) comprising a bottom end and a top end;
a pre-distributor plate ( 114 ) for gas-liquid distribution, the pre-distributor plate ( 114 ) disposed in the reactor vessel ( 102 ) at a pre-determined height above the bottom end of the reactor vessel ( 102 ), wherein the pre-distributor plate ( 114 ) has a bottom surface and a top surface opposite to the bottom surface, wherein the bottom surface faces the bottom end of the reactor vessel ( 102 ); and
a gas distributor ( 106 ) disposed below the pre-distributor plate ( 114 ) to receive gas for injecting gas into a liquid prior to distribution of gas and liquid by the pre-distributor plate ( 114 ), wherein the gas distributor ( 106 ) comprises:
a common manifold ( 108 ) to receive the gas for distributing in the liquid;
a plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) disposed along a length of the common manifold ( 108 ), wherein each of the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) receive the gas from the common manifold ( 108 ); and
a plurality of nozzles disposed along an outer circumference of each ring-shaped pipe of the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) to inject gas into the reactor vessel and create vortexes for uniform distribution of gas in the liquid.

2. The bubble column reactor assembly ( 100 ) as claimed in claim 1 comprising radial pipes ( 204 a , 204 b , 204 c , 204 d ) to fluidly couple the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) with the common manifold ( 108 ).

3. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein the pre-distributor plate ( 114 ) comprises:
a plurality of perforations ( 304 ), wherein each perforation of the plurality of perforations ( 304 ) comprises:
a duct ( 116 ) projecting from the bottom surface of the pre-distributor plate ( 114 ) towards the bottom end of the reactor vessel ( 102 ); and
a cap ( 118 ) disposed on the bottom surface of the pre-distributor plate ( 114 ) enclosing the duct ( 116 ) and the perforation ( 304 ), wherein the cap ( 118 ) comprises a plurality of openings ( 302 ) disposed around a surface of the cap ( 118 ).

4. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein a diameter of the reactor vessel ( 102 ) is in the range of 15 cm to 5 m.

5. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein a Height over Diameter Ratio (H/D) of the reactor vessel ( 102 ) is in the range of 2 to 20.

6. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein the common manifold ( 108 ) comprises:
a first end ( 110 ) coupled to a gas inlet ( 104 ) to receive the gas; and
a second end ( 112 ) disposed at a height above the first end ( 110 ), wherein a distance of the second end ( 112 ) from the bottom end of the reactor vessel ( 102 ) is in a range of 0.5 to 2 times of a diameter of reactor vessel ( 104 ).

7. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein each ring-shaped pipe of the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) has equal inner diameter.

8. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) has varied inner diameters.

9. The bubble column reactor assembly ( 100 ) as claimed in claim 8 , wherein inner diameter of the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) ratios are in a range of 0.1 to 1.0.

10. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein a ratio of diameter of the plurality of ring-shaped pipes ( 202 a , 202 b , 202 c , 202 d ) to a diameter of the reactor vessel ( 102 ) is in a range of 0.05 to 0.95.

11. The bubble column reactor assembly ( 100 ) as claimed in claim 1 , wherein a size of each nozzle of the plurality of nozzles is based on a pre-determined velocity of discharge gas, wherein the velocity of discharge gas is in a range of 2 cm/s to 50 m/s.

12. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein a diameter of each perforation of the plurality of perforations is based on a pre-determined superficial gas velocity, wherein the superficial gas velocity is in a range of 1 cm/s to 40 m/s.

13. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein the plurality of perforations is arranged in any of a triangular pitch, a square pitch, or a circular pitch.

14. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein a pitch to perforation diameter ratio lies in a range of 1 to 15.

15. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein the cap ( 118 ) comprises a base disposed on the bottom surface of the pre-distributor plate ( 114 ), wherein a minimum base diameter of the cap is equivalent to 1.1 times a diameter of the perforation.

16. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein a maximum base diameter of the cap ( 118 ) is equivalent to 0.5 times a pitch of the perforations.

17. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein a length of the duct ( 116 ) is in a range of 30% to 90% of a height of the cap ( 118 ) from the bottom surface of the pre-distributor plate ( 114 ).

18. The bubble column reactor assembly ( 100 ) as claimed in claim 3 , wherein a diameter of the openings ( 302 ) is based on a superficial gas velocity, wherein the superficial gas velocity is in a range of 1 cm/s to 40 m/s.

Assignees

• Hindustan Petroleum Corp Ltd

Inventors

• Raja Kanuparthy Naga
• Bojja Ramachandra Rao
• Sharma Bhavesh

Classifications

• B01J2208/00938

  Flow distribution elements · CPC title

• B01J2208/00902

  Nozzle-type feeding elements · CPC title

• B01J8/1872

  Details of the fluidised bed reactor (B01J8/1836 takes precedence) · CPC title

• C10G47/26

  suspended in the oil, e.g. slurries · CPC title

• B01J2208/00911

  Sparger-type feeding elements · CPC title