Gas: heating and illuminating – Generators – Retort
Patent
1991-09-30
1994-03-01
Housel, James C.
Gas: heating and illuminating
Generators
Retort
48 73, 48197A, 48197R, 48202, 48209, 60 3912, 110222, 110229, 110245, 201 7, 201 21, 201 25, 202105, 202226, C10J 300
Patent
active
052903273
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a process for generating, from refuse or refuse in combination with coal, a fuel gas suited for public utility purposes.
For the purposes of the present invention, the term refuse is used to describe refuse containing energy, for example domestic refuse and other refuse, such as industrial refuse, including for example also waste wood and other kinds of biomass. The term refuse containing energy as used herein is meant to describe refuse containing carbon.
There have been known substantially three different methods for the thermal utilization of refuse: gas.
Hereafter, the typical forms of implementation of the known methods will be described, together with their disadvantageous results and effects:
REFUSE INCINERATION
transferred to a steam boiler. remote heat. remote heat network. unfavorable handling properties of the refuse. limited to lumpy ferrous metals which can be separated and recycled. mostly toxic oxide state--this process being aided by the required high rate of excess air--and have to be removed from great volumes--because of the excess air--of flue gas by a complex cleaning process. lime, and the gypsum then has to be disposed of by costly processes. catalytic poisons still contained in the flue gas heavily impair the service life of the catalysts. denitrogenation plants for refuse incineration processes. under the effect of the sun, thus contributing to the problem of dying forests. substances, there is also the risk that extremely toxic organic contaminants (such as dioxine) may develop.
LOW-TEMPERATURE CARBONIZATION OF REFUSE
The refuse is carbonized in a low-temperature gas generator (rotary drum heated by tubular heat exchangers) at a temperature of about 450.degree. Centigrade, in the absence of air and/or oxygen (allothermal without gasifying whereby a low-temperature gas is generated.
The ferrous metals can be separated out before, practically all other metals, and further inert materials (stones, glass) can be separated out after the low-temperature carbonization process.
The development of toxic oxides and toxic organic compounds is impossible, due to the allothermal operation of the process.
In the reducing atmosphere of the low-temperature carbonization drum, the metals are given the surface typical of the particular metal, and can be recycled for further use after separation from the carbonization residues. low-temperature gas in a high-temperature slag-tap furnace, and the heat contained in the flue gas is transmitted to a steam boiler. remote heat. remote heat network. favorable as compared with the process described under 1) above, due to the better handling properties of the low-temperature carbonization products, as compared with refuse. change over to their mostly toxic oxide form and have to be removed from the flue gas--which in this case, too, arises in quite considerable volumes, in spite of the low rate of excess air, by a complex cleaning process. lime, and the gypsum then has to be disposed of by complex processes. oxides. no satisfactory solution has been found to this day. under the effect of the sun, thus contributing to the problem of dying forests. gas process) in the presence of air, and the resulting crude gas is purified. During the refining process, large-molecular carbon compounds are reduced to small-molecular carbon compounds. stage, and is not suited for public utility purposes. the very place. are required. substantial part of the energy content of the refuse introduced into the process, cannot be further utilized thermally, due to the pollutant emissions that have to be expected. purification plants also have to handle larger volumes. oxidations can hardly develop. sulfide and can be washed out simply by liquid purification. oxides are produced in only very small quantities by the combustion of the pure gas.
For thermal utilization of coal, there has been known an allothermal coal/water vapor fluid-bed gasification process.
According to this process, coal dust is reduced to a crude ga
REFERENCES:
patent: 2743217 (1956-04-01), Slisby
patent: 3886873 (1975-06-01), Sundquist et al.
patent: 3912465 (1975-10-01), Kunii et al.
patent: 4028068 (1977-06-01), Kiener
patent: 4300915 (1981-11-01), Schmidt et al.
patent: 4322222 (1982-03-01), Sass
patent: 4544374 (1985-10-01), Mallek et al.
patent: 4667467 (1987-05-01), Archer et al.
patent: 4840129 (1989-06-01), Jelinek
patent: 4852996 (1989-08-01), Knop et al.
patent: 4878440 (1989-11-01), Tratz et al.
patent: 5064444 (1991-11-01), Kubiak et al.
Rost, M., van Heek, K. H., Knop, K.: Umweltfreundliche Stromerzeugung durch Einsatz der allothermen Kohlevergasung nach dem MBG-Verfahren. In: VBG Kraftwerkstechnik, vol. 68 (1988), Heft 5, pp. 461 to 468.
Hackler Walter A.
Housel James C.
Wallenhorst Maureen M.
LandOfFree
Device and allothermic process for producing a burnable gas from does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and allothermic process for producing a burnable gas from, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and allothermic process for producing a burnable gas from will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-573403