Biomass converters and processes
First Claim
1. A method of processing relatively wet bio-mass material, comprising:
- (a) drying a mass of wet bio-mass material by(i) providing relatively wet bio-mass material to be dried, as a bed of such bio-mass material over a floor of a dryer, the dryer having an inlet and an outlet, an air supply system being associated with the dryer and releasing air into the bed of bio-mass material,(ii) providing a supply of heated air through the air supply system to the bed of bio-mass material, thus to percolate the heated air through the bed of bio-mass material such that the air emerges from the bed of bio-mass material,(iii) mixing the bed of bio-mass material by applying mixing apparatus to the bed of bio-mass material while the heated air is percolating upwardly through the bed of bio-mass material, and;
(iv) moving the bio-mass material progressively toward the outlet of the dryer whereby a relatively drier, solid-phase, first portion of the bio-mass material is generally displaced from a relatively wetter second portion of the bio-mass material in the bed of bio-mass material;
(b) removing at least a portion of the relatively drier, solid-phase, first portion of bio-mass material as product from the dryer;
(c) supplying at least some of the first portion of the dried, solid-phase, bio-mass material, which has been removed from the dryer, to a combustor;
(d) burning, in the combustor, the solid-phase bio-mass material supplied from the dryer, to produce heat energy; and
(e) converting at least a portion of the heat energy, produced in the combustor, to electrical energy.
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Accused Products
Abstract
This invention pertains to a bio-mass processing system, and method of processing waste bio-mass, wherein one or more mixers mixes a bed of bio-mass material such as manure at substantially any and all locations in a defined length and width portion of the bed, in a dryer. Heated air percolates upwardly through the bed. Separation apparatus separates a relatively dryer fraction of the bio-mass material from the dryer. The separated finished product from the dryer is optionally fed to a boiler where the dried bio-mass material is burned. Heat of combustion from the boiler is used as dryer heat for drying the bio-mass feed material in the dryer. Excess heat is optionally used to produce steam, which powers a turbine, which powers an electrical generator. Residual ash from the combustion process comprises about 2% by weight of the solids content of e.g. a feed stream coming into the dryer.
107 Citations
77 Claims
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1. A method of processing relatively wet bio-mass material, comprising:
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(a) drying a mass of wet bio-mass material by (i) providing relatively wet bio-mass material to be dried, as a bed of such bio-mass material over a floor of a dryer, the dryer having an inlet and an outlet, an air supply system being associated with the dryer and releasing air into the bed of bio-mass material, (ii) providing a supply of heated air through the air supply system to the bed of bio-mass material, thus to percolate the heated air through the bed of bio-mass material such that the air emerges from the bed of bio-mass material, (iii) mixing the bed of bio-mass material by applying mixing apparatus to the bed of bio-mass material while the heated air is percolating upwardly through the bed of bio-mass material, and; (iv) moving the bio-mass material progressively toward the outlet of the dryer whereby a relatively drier, solid-phase, first portion of the bio-mass material is generally displaced from a relatively wetter second portion of the bio-mass material in the bed of bio-mass material; (b) removing at least a portion of the relatively drier, solid-phase, first portion of bio-mass material as product from the dryer; (c) supplying at least some of the first portion of the dried, solid-phase, bio-mass material, which has been removed from the dryer, to a combustor; (d) burning, in the combustor, the solid-phase bio-mass material supplied from the dryer, to produce heat energy; and (e) converting at least a portion of the heat energy, produced in the combustor, to electrical energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of processing relatively wet bio-mass material, comprising:
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(a) drying a mass of wet bio-mass material by (i) providing relatively wet bio-mass material to be dried, as a bed of such bio-mass material over a floor of a dryer, the dryer having length and width dimensions, an inlet and an outlet, a stationary air supply system extending substantially the full length and the full width of the dryer at or proximate the floor of the dryer, such bed of bio-mass material having a top and a bottom, whereby the stationary air supply system is at or proximate the bottom of the bed of bio-mass material, (ii) providing a supply of heated air through the stationary air supply system to the bed of bio-mass material at a low pressure such that the heated air percolates through the bed of bio-mass material at such a rate that a flow of high-humidity air is continually emerging from the bed of bio-mass material, (iii) providing a supply of relatively ambient air at the bed of bio-mass material, entraining the high-humidity air in the relatively ambient air and exhausting the so-entrained high-humidity air back to the ambient atmosphere, thereby continuously removing the high-humidity air which is emerging from the bed, (iv) mixing the bed of bio-mass material by applying mixing apparatus to the bed of bio-mass material while the heated air is percolating upwardly through the bed of bio-mass material, and (v) moving the bio-mass material progressively through the dryer whereby a relatively drier, solid-phase, first portion of the bio-mass material is generally displaced from a relatively wetter second portion of the bio-mass material in the bed of bio-mass material; (b) removing at least a portion of the relatively drier, solid-phase, first portion of bio-mass material as product from the dryer; (c) burning a substantial portion of the relatively drier, solid-phase, bio-mass material in a combustor to produce heat energy; and (d) converting at least a portion of the heat energy, produced in the combustor, to electrical energy. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of processing relatively wet bio-mass material, comprising:
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(a) drying a mass of wet bio-mass material by (i) providing relatively wet bio-mass material to be dried, as a bed of such bio-mass material over a floor of a dryer, the dryer having an inlet and an outlet, an air supply system being associated with the dryer and releasing air into the bed of bio-mass material, (ii) providing a supply of heated air through the air supply system to the bed of bio-mass material at a low pressure such that the heated air percolates through the bed of bio-mass material at such a rate that a flow of high-humidity air is continually emerging from the bed of bio-mass material, (iii) mixing the bed of bio-mass material by applying mixing apparatus to the bed of bio-mass material and thereby mixing a relatively small portion of the bio-mass material at any given time, and moving the mixing apparatus throughout the bed of bio-mass material thereby to periodically bring the mixing apparatus into mixing contact with substantially all portions of the bed of bio-mass material, and (iv) moving the bio-mass material progressively through the dryer whereby a relatively drier, solid phase, first portion of the bio-mass material is generally displaced from a relatively wetter second portion of the bio-mass material in the bed of bio-mass material; (b) removing at least a portion of the relatively drier, solid-phase, first portion of bio-mass material as product from the dryer and supplying at least a portion of the relatively drier, solid-phase, bio-mass material, removed from the dryer, to a combustor; (c) burning the supplied portion of the relatively drier bio-mass material in the combustor and thereby producing heat energy; and (d) converting at least a portion of the heat energy to electrical energy. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method of processing relatively wet bio-mass material, comprising:
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(a) drying a mass of wet bio-mass material by (i) providing relatively wet bio-mass material to be dried, as a bed of such bio-mass material over a floor of a dryer, the dryer having an inlet and an outlet, an air supply system being associated with the dryer and releasing air into the bed of bio-mass material, (ii) providing a supply of heated air through the air supply system to the bed of bio-mass material, thus to percolate the heated air through the bed of bio-mass material such that a flow of high-humidity air is continually emerging from the bed of bio-mass material, (iii) mixing the bed of bio-mass material by applying mixing apparatus to the bed of bio-mass material while the heated air is percolating through the bed of bio-mass material, and; (iv) moving the bio-mass material progressively toward the outlet of the dryer, from the inlet of the dryer to the exit of the dryer, whereby a relatively drier, solid-phase, first portion of the bio-mass material is generally displaced from a relatively wetter second portion of the bio-mass material in the bed of bio-mass material; (b) removing at least a portion of the relatively drier, solid-phase, first portion of bio-mass material as product from the dryer and supplying a first portion of the relatively drier, solid-phase, bio-mass material, removed from the dryer, to a combustor; (c) recycling a second portion of the relatively drier, solid-phase, bio-mass material, removed from the dryer, back to the inlet of the dryer; (d) burning, in the combustor, the first portion of the relatively drier, solid-phase, bio-mass material, supplied from the dryer, to produce heat energy; and (e) converting at least a portion of the heat energy, produced in the combustor, to electrical energy. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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63. A method of processing relatively wet bio-mass material, comprising:
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(a) drying a mass of web bio-mass material by (i) providing relatively wet bio-mass material to be dried as a bed of such bio-mass material on a floor of a dryer, the dryer having an inlet and an outlet, an air supply system being associated with the dryer and releasing air into the bed of bio-mass material, (ii) providing a supply of heated air through the air supply system to the bed of bio-mass material in the dryer, at low air pressure, at a temperature and at sufficient air flow rate that the heated air percolates through the bed of bio-mass material and emerges, as high humidity air, from the bed of bio-mass material, while maintaining a substantially aerobic environment in the bed of bio-mass material; and (b) removing a relatively drier, solid-phase, portion of bio-mass material as product from the dryer and supplying at least a portion of the relatively drier, solid-phase, bio-mass material, removed from the dryer, to a combustor; (c) burning the supplied portion of the relatively dryer bio-mass material in the combustor and thereby producing heat energy; (d) converting a first portion of the heat energy, produced in the combustor, to electrical energy in a generator; and (e) supplying a second portion of the heat energy to the air supply system in the dryer, wherein the quantity of electricity produced by the generator, along with the second portion of heat energy supplied to the air supply system in the dryer, is sufficient to provide all the heat required in the dryer and all of the electrical energy required to power the dryer and the combustor. - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
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Specification