UST955002I4 - Fertilizer processes incorporating scrubbed flue gas sludge byproduct - Google Patents

Fertilizer processes incorporating scrubbed flue gas sludge byproduct Download PDF

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Publication number
UST955002I4
UST955002I4 US05/660,054 US66005476A UST955002I4 US T955002 I4 UST955002 I4 US T955002I4 US 66005476 A US66005476 A US 66005476A US T955002 I4 UST955002 I4 US T955002I4
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US
United States
Prior art keywords
sludge
ammonia
acid
discharged
flue gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
US05/660,054
Inventor
James J. Schultz
Vincent J. Van Pelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tennesse Valley Authority (ATV)
Original Assignee
Tennesse Valley Authority (ATV)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tennesse Valley Authority (ATV) filed Critical Tennesse Valley Authority (ATV)
Priority to US05/660,054 priority Critical patent/UST955002I4/en
Priority to US05/733,395 priority patent/US4028087A/en
Application granted granted Critical
Publication of UST955002I4 publication Critical patent/UST955002I4/en
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor

Abstract

A process for the production of a granular fertilizer material from sludge materials discharged from scrubbing processes that remove pollutants from boiler flue gases. Waste sludge discharged from flue gas scrubber systems often contain large amounts of calcium and sulfur as well as lesser amounts of other compounds known to have plant nutrient value. The sludge is treated with an acid such as phosphoric, sulfuric or nitric, or a mixture of these, and ammonia. The resulting sludge-ammonia-acid salt mixture is combined with partially dried, previously processed solid material (recycle) in a horizontal rotating vessel. Additional ammonia and/or acid is added to the rotating vessel to cause the sludge-salt mixture to solidify and granulate. Other plant nutrients may be added to the rotating vessel during granulation. The granulated material discharged from the rotary vessel is further processed (dried, cooled, and screened) to obtain desirable moisture content and particle size.
US05/660,054 1976-02-23 1976-02-23 Fertilizer processes incorporating scrubbed flue gas sludge byproduct Expired UST955002I4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US05/660,054 UST955002I4 (en) 1976-02-23 1976-02-23 Fertilizer processes incorporating scrubbed flue gas sludge byproduct
US05/733,395 US4028087A (en) 1976-02-23 1976-10-18 Fertilizer processes incorporating scrubbed flue gas sludge byproduct

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/660,054 UST955002I4 (en) 1976-02-23 1976-02-23 Fertilizer processes incorporating scrubbed flue gas sludge byproduct

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/733,395 Continuation US4028087A (en) 1976-02-23 1976-10-18 Fertilizer processes incorporating scrubbed flue gas sludge byproduct

Publications (1)

Publication Number Publication Date
UST955002I4 true UST955002I4 (en) 1977-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US05/660,054 Expired UST955002I4 (en) 1976-02-23 1976-02-23 Fertilizer processes incorporating scrubbed flue gas sludge byproduct

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US (1) UST955002I4 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670225A (en) 1983-07-29 1987-06-02 Societe Anonyme Styled: S.A.E.TIMAC Apparatus for continuously making, in dry phase, exothermic reactions involving liberation of gas, and products obtained, particularly calcium phosphates
US5984992A (en) * 1997-05-07 1999-11-16 Unity, Inc. Sewage sludge recycling with a pipe cross-reactor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670225A (en) 1983-07-29 1987-06-02 Societe Anonyme Styled: S.A.E.TIMAC Apparatus for continuously making, in dry phase, exothermic reactions involving liberation of gas, and products obtained, particularly calcium phosphates
US5984992A (en) * 1997-05-07 1999-11-16 Unity, Inc. Sewage sludge recycling with a pipe cross-reactor
US6159263A (en) * 1997-05-07 2000-12-12 Unity, Inc. Sewage sludge recycling with a pipe cross-reactor
US6758879B2 (en) 1997-05-07 2004-07-06 Unity, Inc. Sewage sludge recycling with a pipe cross-reactor

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