Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Fertilizer processes incorporating scrubbed flue gas sludge byproduct
T955002 Fertilizer processes incorporating scrubbed flue gas sludge byproduct

Patent Drawings:
Inventor: Schultz, et al.
Date Issued: February 1, 1977
Application: 05/660,054
Filed: February 23, 1976
Inventors: Schultz; James J. (Florence, AL)
Van Pelt; Vincent J. (Florence, AL)
Assignee:
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 423/310; 71/25; 71/34; 71/43
Field Of Search:
International Class: C05C 3/00
U.S Patent Documents:
Foreign Patent Documents:
Other References:

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.
Claim:
Description:
 
 
  Recently Added Patents
Embedded planar antenna with pertaining tuning method
Constant-temperature-difference flow sensor, and integrated flow, temperature, and pressure sensor
Clearinghouse for messages between disparate networks
Image processing system that reduces image uneveness
Multi-state EEPROM having write-verify control circuit
Magneto-resistive sensor with test mode activation
Method and apparatus for energy harvesting using rotational energy storage and release
  Randomly Featured Patents
Fever thermometer protector
System and method for enhancing the activation of DSL service
Novel maltase enzyme produced by a new yeast strain
Resistance welding power supply apparatus
Heat-resistant, resin coated electric wire characterized by three resin coatings, the outer of which is less highly cross-linked than the coating next adjacent thereto
CD-ROM product label apparatus and method
Cooling system for turbomachinery
Faucet
Fire refining precious metals asay method
Methods and apparatus for lenses and frames and eyeglasses