Fuel and related compositions – Solidified liquid
Patent
1997-12-23
1999-11-09
Lovering, Richard D.
Fuel and related compositions
Solidified liquid
44502, 241 16, 241DIG38, 366348, 516 31, 516 77, 516930, B01J 1300, B02C 100, C10L 702, F23G 502
Patent
active
059805927
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of processing liquid, solid and/or viscous, problematic, organic chemical wastes for the disposal thereof, if possible using the calorific value of the waste, and a plant for carrying out the method.
BACKGROUND ART
Today's industrial production leaves many types of waste materials, including chemical waste materials, which for environmental reasons have to be disposed of, i.e. converted into an environmentally acceptable form, by incineration, for instance in a rotary furnace. At incineration in a rotary furnace, the calorific value of the problematic waste can be utilized. If, after incineration, the waste type leaves ashes or cinders, the disposal of which may still cause environmental problems, it may be advantageous to incinerate the waste in a cement kiln, confer as an example WO publication No. nr. 94/09319.
Some of the problematic waste materials are difficult to handle, as they are in a solid or pastose form. Such materials are difficult to feed into a combustion furnace under stable conditions, so that a fairly constant and sufficiently high combustion temperature can be maintained. In order to ensure a uniform and adjustable feeding of the waste material, it is advantageous, if the material is easily converted into a pumpable material.
EP patent No. 73.787 discloses a method of processing a nonpumpable, solid or viscous problematic waste material, such as discarded paints, paint sludge, greasy wastes, distillation residues, which may contain oil sludge, organic compounds and the like, wherein the waste is subjected to a mechanical reduction in size and simultaneously or subsequently dispersed with water to saturation at mechanical mixing, whereby a pumpable dispersion is obtained, which can be used as a fuel. However, experience has shown that this method cannot be used for all types of waste.
Another problem when incinerating chemical wastes is that certain types of waste may be highly active, whereby explosions may occur, if high concentrations of said wastes are fed into a combustion furnace.
Certain types of particularly active wastes may cause problems in form of heavy exothermic reactions creating explosions merely by being vigorously ground.
WO publication No. 91/01185 discloses a method for utilizing residues and waste waters from paint shops and lacquer processing installations, in particular lacquer and paint sludges, and colorant waste from the automobile industry, i.a. by utilizing the calorific value of the organic compounds contained therein. By this method, the varying and possibly mechanically drained residues are collected separately in closed transport containers from the different places, in which the waste occurs, and transported to a central processing and utilization plant. In this plant, the residues, containing volatile organic compounds and/or water under the selected process conditions, are dried and ground in a heated, continuously driven contact drier at 120.degree. C. to 250.degree. C. under a slight vacuum and while being kneaded and mixed. For some types of waste, such a drying process at an increased temperature results in caking or hardening, which makes it impossible to convert the waste material into a pumpable form, which may be injected through a nozzle into a combustion furnace at a later stage. Moreover, there is a risk of explosions when drying at such high temperatures.
DE patent No. 3.900.482 discloses a method for the disposal of lacquer and paint sludges and colorant wastes, in particular from the automobile industry, wherein the wastes, subsequent to any thorough separation of volatile solvents and possibly while being cooled, are ground and mixed with at least the same quantity of coal dust and possibly with alkaline additives, preferably quicklime and/or limestone powder, whereafter it may be burnt. This method cannot either be used for the most difficult types of chemical wastes, in particular such wastes leaving a solid mass which is difficult to grind or cannot be ground at all, subsequ
REFERENCES:
patent: 3951849 (1976-04-01), Vickery et al.
patent: 4133273 (1979-01-01), Glennon
patent: 4164396 (1979-08-01), Jones
patent: 4320709 (1982-03-01), Hladun
patent: 4419943 (1983-12-01), Faurholdt
patent: 5191155 (1993-03-01), Driemel et al.
Lovering Richard D.
RAG Umweltrohstoffe GmbH
LandOfFree
Method of processing problematic, organic, chemical wastes, and does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of processing problematic, organic, chemical wastes, and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of processing problematic, organic, chemical wastes, and will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1449951