Folke A Engstrom

47551348, Jul 5, 1988

May 8, 1987

7/052047

Folke Engstrom - San Diego CA
Ragnar G. Lundqvist - La Jolla CA

A. Ahlstrom Corporation - Karhula

F23D 1900

431170

The invention relates to a circulating fluidized bed reactor comprising a particle separator (9) having a horizontal vortex chamber (23). The separator is preferably disposed on top of the combustion chamber (5). The pipes (25) discharging gas from the vortex chamber have been connected to openings (24) disposed on the periphery (19) of the vortex chamber.

50930850, Mar 3, 1992

Feb 26, 1988

7/161141

Folke Engstrom - San Diego CA
Reijo Kuivalaninen - Karhula, FI

A. Ahlstrom Corporation - Karhula

F27B 1509
B01J 818

422143

Fluidized bed reactor method and apparatus for removal of coarse material from the reactor. The apparatus comprises a discharge device including a substantially vertical pipe portion connected at one end with an outlet opening in the reactor grid, and at another end to an aeration chamber containing a discharge opening located below the level of the grid outlet opening; and a device for supplying pressurized air in short blasts of 30 to 100 milliseconds, preferably at pressures of from 2. 5 to 7. 0 bar, into the aeration chamber in the direction of the discharge opening to remove the coarse material from the reactor. Low pressure fluidizing air may be supplied to the vertical pipe portion as well as the aeration chamber to return small particles in the discharge device to the fluidization zone of the reactor.

47568909, Jul 12, 1988

Apr 1, 1987

7/033453

John T. Tang - San Diego CA
Juha P. Sarkki - San Diego CA
Asfaha Tesfai - San Diego CA
Folke Engstrom - San Diego CA

Pyropower Corporation - San Diego CA

C01B 2100
B01J 800
B01D 5000
B01D 5334

423235

NO. sub. x reduction in a combustion product flue gas stream is greatly improved by the efficient mixing of the reducing agent, e. g. , NH. sub. 3 or an NH. sub. 3 precursor, with the stream in the absence of a catalyst, such as CaO or CaCO. sub. 3, that promotes undesirable combination of NH. sub. 3 and O. sub. 2 to form additional NO. sub. x. By employing a high-temperature cyclone separator of the like and by injecting the reducing agent into the stream within such hot cyclone at a location where there is a strong vortex region, extremely efficient mixing of the NO. sub. x reducing agent and the combustion product flue gas is promoted after particulates which are harmful to the reaction that promotes NH. sub. 3 and NO. sub. x reduction have been separated from the flue gases. A refractory-lined cyclone separator may be employed, and a plurality of injectors used which discharge liquid or gas into the strong vortex region.

47531770, Jun 28, 1988

Apr 30, 1987

7/044199

Folke Engstrom - San Diego CA
Juhani Isaksson - Karhula, FI
Reijo Kuivalainen - Karhula, FI

A. Ahlstrom Corporation - Karhula

F23H 300

110299

A fluidized bed reactor (1) comprising a reactor chamber (4) having a gas distributor plate (5) for feeding primary air, and a space above said distributor plate (5) is divided into compartments (6) by means of partition walls (7) having discharge openings (9) for feeding secondary air to the circulating bed.

52308685, Jul 27, 1993

Apr 4, 1989

7/332730

Folke Engstrom - San Diego CA

A. Ahlstrom Corporation - Karhula

F27B 1510
B01J 818

422143

A fluidized bed reactor uses fluid conduits for supplying fluids (such as liquid, gaseous, or fine solid material in suspension fuels), into a reactor chamber. The fluid conduits extend horizontally from, and substantially perpendicularly to, a side wall into the reactor chamber. The fluid conduits are disposed at a level (e. g. about 100-1000 mm) above the fluidizing gas nozzles in the bottom of the reactor chamber. An upright partition, preferably of refractory material, covers the fluid conduits.

48692077, Sep 26, 1989

Apr 11, 1988

7/180122

Folke Engstrom - San Diego CA
Juhani Isaksson - Karhula, FI

A. Ahlstrom Corporation - Karhula

F22B 100

122 4D

A circulating fluidized bed reactor includes a filter apparatus for separation and recycling of fine particles which are entrained by the flue gas. The housing of the filter apparatus has a plurality of vertically disposed ceramic filtration tubes. The reactor chamber and filter housing are arranged back-to-back and have a common wall therebetween. A pre-separator for separation of coarse particles is provided which connects the reactor chamber with the filter apparatus. The reactor, the separator and the filter apparatus are encased in a pressure-proof cylindrical vessel. The walls of the reactor chamber and the filter housing can be water-cooled. In another form, the filter is comprised of a plurality of porous plates having ribs abutting adjacent plates to define passageways through the filter.

47080922, Nov 24, 1987

Sep 22, 1986

6/915065

Folke Engstrom - San Diego CA

A. Ahlstrom Corporation - Karhula

F22B 100

122 4D

The invention comprises a circulating fluidized bed boiler having a vertical combustion chamber and a convection part which at least partly are formed by tube walls, and a horizontal cyclone separator, the gas inlet channel of which is connected to the upper part of the combustion chamber and a return channel for solids to the lower part of the combustion chamber. In order to accomplish a compact construction, the cyclone separator has been located on top of the combustion chamber and two opposite tube walls of the combustion chamber and possibly also one tube wall of the convection part have been used to form the cyclone separator.

47478527, May 31, 1988

Aug 25, 1986

6/902407

Folke Engstrom - San Diego CA

A. Ahlstrom Corporation - Karhula

B01D 4512
B04C 900
F27B 1512

55 1

A method and an apparatus for separating coarse and fine solid particles from flue gases in a circulating fluidized bed reactor provide for flue gases to be led to a cyclone separator, located adjacent the reactor. A discharge opening is provided in the lower portion of the separator, opening into a suction chamber interposed between the discharge opening and a return duct. Coarse particles are returned to the reactor via the return duct while fine particles are pulled into a suction pipe connected to the suction chamber, and are then returned to the reactor separately from the coarse particles. At the same time, a minor portion of the flue gases are removed through the discharge opening in the separator with the solid particles and returned to the reactor. The major portion of the flue gases is discharged through an opening in the upper portion of the separator.