Abstract

Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.

IPC Classes  ?

• B01D 53/10 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents with dispersed adsorbents
• B01D 46/02 - Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• B01D 53/30 - Controlling by gas-analysis apparatus
• B01D 53/64 - Heavy metals or compounds thereof, e.g. mercury
• B01D 53/68 - Halogens or halogen compounds
• F23J 15/00 - Arrangements of devices for treating smoke or fumes
• F23J 15/02 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
• F23J 15/04 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
• F23J 15/06 - Arrangements of devices for treating smoke or fumes of coolers
• F23J 15/08 - Arrangements of devices for treating smoke or fumes of heaters

Abstract

Methods and systems for producing calcium carbonate from calcium hydroxide and carbon dioxide are disclosed herein. In some embodiments, a method for producing calcium carbonate comprises (i) providing a first plurality of particles comprising solid-state calcium hydroxide, and (ii) introducing a gas stream comprising carbon dioxide to the first plurality of particles to produce a second plurality of particles comprising calcium carbonate. Individual ones of the first plurality of particles can include a specific surface area of at least 20 m2/g and a free moisture content of from 2% to 20%. The second plurality of particles comprising calcium carbonate are not produced via precipitation.

IPC Classes  ?

• C01F 11/18 - Carbonates
• B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus

Abstract

Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.

IPC Classes  ?

• B01D 53/02 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography
• B01D 53/10 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents with dispersed adsorbents
• B01D 46/02 - Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• F23J 15/02 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
• F23J 15/04 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
• F23J 15/06 - Arrangements of devices for treating smoke or fumes of coolers
• F23J 15/00 - Arrangements of devices for treating smoke or fumes
• B01D 53/68 - Halogens or halogen compounds
• F23J 15/08 - Arrangements of devices for treating smoke or fumes of heaters
• B01D 53/30 - Controlling by gas-analysis apparatus
• B01D 53/64 - Heavy metals or compounds thereof, e.g. mercury

Abstract

2/g.

IPC Classes  ?

• B01D 53/50 - Sulfur oxides
• B01D 53/68 - Halogens or halogen compounds
• B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
• B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C01F 11/02 - Oxides or hydroxides
• C04B 2/04 - Slaking
• C04B 2/06 - Slaking with addition of substances, e.g. hydrophobic agents

Abstract

2/g.

IPC Classes  ?

• B01D 53/50 - Sulfur oxides
• B01D 53/68 - Halogens or halogen compounds
• B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
• B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C04B 2/04 - Slaking
• C04B 2/06 - Slaking with addition of substances, e.g. hydrophobic agents
• C01F 11/02 - Oxides or hydroxides

Abstract

Methods and systems for producing calcium carbonate from calcium hydroxide and carbon dioxide are disclosed herein. In some embodiments, a method for producing calcium carbonate comprises (i) providing a first plurality of particles comprising solid-state calcium hydroxide, and (ii) introducing a gas stream comprising carbon dioxide to the first plurality of particles to produce a second plurality of particles comprising calcium carbonate. Individual ones of the first plurality of particles can include a specific surface area of at least 20 m2/g and a free moisture content of from 2% to 20%. The second plurality of particles comprising calcium carbonate are not produced via precipitation.

IPC Classes  ?

• C01F 11/18 - Carbonates

Abstract

Methods and systems for producing calcium carbonate from calcium hydroxide and carbon dioxide are disclosed herein. In some embodiments, a method for producing calcium carbonate comprises (i) providing a first plurality of particles comprising solid-state calcium hydroxide, and (ii) introducing a gas stream comprising carbon dioxide to the first plurality of particles to produce a second plurality of particles comprising calcium carbonate. Individual ones of the first plurality of particles can include a specific surface area of at least 20 m2/g and a free moisture content of from 2% to 20%. The second plurality of particles comprising calcium carbonate are not produced via precipitation.

IPC Classes  ?

• C01F 11/18 - Carbonates

Abstract

2/g and a free moisture content of from 2% to 20%. The second plurality of particles comprising calcium carbonate are not produced via precipitation.

IPC Classes  ?

• C01F 11/18 - Carbonates
• B01D 53/62 - Carbon oxides
• B01D 53/81 - Solid phase processes

Abstract

Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

IPC Classes  ?

• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• F26B 5/00 - Drying solid materials or objects by processes not involving the application of heat
• C02F 11/145 - Treatment of sludgeDevices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
• C10G 1/04 - Production of liquid hydrocarbon mixtures from oil shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
• B01D 21/30 - Control equipment
• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• B65G 5/00 - Storing fluids in natural or artificial cavities or chambers in the earth
• B09B 1/00 - Dumping solid waste
• B01D 21/01 - Separation of suspended solid particles from liquids by sedimentation using flocculating agents
• C02F 11/148 - Combined use of inorganic and organic substances, being added in the same treatment step
• E21B 21/06 - Arrangements for treating drilling fluids outside the borehole
• E21B 43/34 - Arrangements for separating materials produced by the well
• C02F 103/10 - Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
• C02F 1/56 - Macromolecular compounds

Abstract

2/g.

IPC Classes  ?

• B01D 53/50 - Sulfur oxides
• B01D 53/68 - Halogens or halogen compounds
• B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
• B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C04B 2/04 - Slaking
• C01F 11/02 - Oxides or hydroxides
• C04B 2/06 - Slaking with addition of substances, e.g. hydrophobic agents

Abstract

Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.

IPC Classes  ?

• B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents

Abstract

Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.

IPC Classes  ?

• B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours

Abstract

Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.

IPC Classes  ?

• B01D 53/02 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography
• B01D 53/10 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents with dispersed adsorbents
• B01D 46/02 - Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• F23J 15/02 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
• F23J 15/04 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
• F23J 15/06 - Arrangements of devices for treating smoke or fumes of coolers
• F23J 15/00 - Arrangements of devices for treating smoke or fumes
• B01D 53/68 - Halogens or halogen compounds
• F23J 15/08 - Arrangements of devices for treating smoke or fumes of heaters
• B01D 53/30 - Controlling by gas-analysis apparatus
• B01D 53/64 - Heavy metals or compounds thereof, e.g. mercury

Abstract

Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide- containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D10 from about 0.5 microns to about 4 microns, a D90 less than about 30 microns, and a ratio of D90 to D10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m2/g.

IPC Classes  ?

• B01J 20/06 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group

Abstract

Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide- containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D10 from about 0.5 microns to about 4 microns, a D90 less than about 30 microns, and a ratio of D90 to D10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m2/g.

IPC Classes  ?

• B01J 20/06 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group

Abstract

2/g.

IPC Classes  ?

• B01D 53/50 - Sulfur oxides
• C01F 11/02 - Oxides or hydroxides
• C04B 2/06 - Slaking with addition of substances, e.g. hydrophobic agents
• C04B 2/04 - Slaking
• B01D 53/68 - Halogens or halogen compounds

Abstract

A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the system employs the boiler component of the waste heat recovery and power generation circuit as a heat exchanger to recover the waste heat from the kiln, which is used to drive the steam turbines. The heat absorption from the latter stage lowers the temperature of the kiln offgas sufficiently for optimum performance from the scrubber. The presence of lime particles in the offgas effectively protects the boiler tube surfaces from corrosion which would occur at optimum scrubber temperatures, and subsequently provides the lime required as a scrubbing medium for the dry scrubber. Further, the efficient scrubbing allows for the use of any fuel for firing the kiln inclusive of high sulphur content compounds. A process for effecting the technology is also provided.

IPC Classes  ?

• B01D 53/50 - Sulfur oxides

Goods & Services

Agricultural limestone and agricultural limestone byproducts, namely, pulverized limestone, lime, quicklime, hydrated lime, kiln dust and calcium hydroxide Limestone and non-agricultural limestone byproducts, namely, lime, quicklime, hydrated lime, and calcium carbonate [ ; concrete, asphalt and construction aggregates, namely, sand, stone and gravel ]