Fly-ash slurry with solidification retardant
AssigneeADA Environmental Solutions, LLC
InventorsJohn Philip Comer, Kenneth Eugene Baldrey, John Wurster, Robert P. Sterner
Life of this patent
Estimating the term…
Abstract
A method using retardant to inhibit solidification of slurried fly ash particles that were collected on a collection surface. The slurried particles are transported in a pipeline to a collection or disposal site during or after the addition of the retardant to the slurry. The retardant can be a dispersant, a deflocculant, a scale inhibitor or a sequestering agent such as a phosphate, organic phosphate, polymer, and mixtures thereof.
Claims25
A method for removing undesired particles from a gas stream, the steps of:
- removing the undesired particles from the gas stream to form collected particles;
- forming the collected particles into a slurry;
- and
- transporting the slurry in a conduit to a disposal site, wherein the slurry includes a retardant to inhibit substantially the solidification of the slurry in the conduit and wherein the concentration of the retardant in the slurry ranges from about 0.01 to about 0.02 g/l.
A method for removing undesired particles from a gas stream, comprising the steps of:
- collecting the undesired particles on a collection surface to form collected particles;
- removing the collected particles from the collection surface;
- forming the removed collected particles into a slurry;
- and
- transporting the slurry in a conduit to a disposal site, wherein the slurry includes a retardant that is at least one of a scale inhibitor, a dispersant, a sequestering agent, and a deflocculant to inhibit substantially the solidification of the slurry in the conduit, wherein the retardant is selected from the group consisting of mineral acids, salts of mineral acids, chelants, sequestrants, organic phosphates, polymers and mixtures thereof and wherein the concentration of the retardant in the slurry ranges from about 0.01 to about 0.20 g/l.
A method for removing undesired particles from a gas stream, comprising the steps of:
- collecting the undesired particles on a collection surface to form collected particles;
- removing the collected particles from the collection surface;
- forming the removed collected particles into a slurry;
- and
- transporting the slurry in a conduit to a collection site, wherein during at least one of the forming and transporting steps the slurry is contacted with a retardant to inhibit substantially the solidification of the slurry in the conduit, the retardant being selected from the group consisting of phosphoric acid, inorganic phosphates, organic phosphates, polyacrylates, and mixtures thereof and wherein the volumetric ratio of the retardant to the slurry ranges from about 0.1:10,000 to about 1.5:10,000.
A method for removing undesired particles from a gas stream, comprising the steps of:
- removing the undesired particles from the gas stream to form collected particles;
- forming the collected particles into a slurry;
- and
- transporting the slurry in a conduit to a disposal site, wherein the slurry includes a retardant to inhibit substantially the solidification of the slurry in the conduit and wherein the amount of retardant added to the undesired particles ranges from about 0.5 to about 15 g/kg.
A method for removing undesired particles from a gas stream, comprising the steps of:
- removing the undesired particles from the gas stream to form collected particles;
- forming the collected particles into a slurry;
- and
- transporting the slurry in a conduit to a disposal site, wherein the slurry includes a retardant to inhibit substantially the solidification of the slurry in the conduit and wherein the volumetric ratio of the retardant to the slurry ranges from about 0.1:10,000 to about 1.5:10,000.
A method for removing undesired particles from a gas stream, comprising the steps of:
- removing the undesired particles from the gas stream to form collected particles;
- forming the collected particles into a slurry;
- and
- transporting the slurry in a conduit to a disposal site, wherein the slurry includes a retardant to inhibit substantially the solidification of the slurry in the conduit and wherein the retardant comprises from about 20 to about 35 wt % hexametaphosphate and from about 1 to about 5 wt % tripolyphosphate.
A method for removing undesired particles from a gas stream, comprising the steps of:
- collecting the undesired particles on a collection surface to form collected particles;
- removing the collected particles from the collection surface;
- forming the removed collected particles into a slurry;
- and
- transporting the slurry in a conduit to a disposal site, wherein the slurry includes a retardant that comprises from about 20 to about 35 wt % hexametaphosphate and from about 1 to about 5 wt % tripolyphosphate.
Dependencies are inferred from the claim text.