Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1995-10-20
1998-07-14
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
521 41, C08J 1114
Patent
active
057805180
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to the technology of processing industrial and domestic waste. It can be used in the rubber industry and in the fuel-power industry for use of waste rubber as a fuel.
BACKGROUND OF THE INVENTION
There exists a method of processing waste to obtain liquid and gaseous fuel by means of pyrolysis and decomposition of the products of pyrolysis into solid, liquid and gaseous phases. The solid phase is restored by water vapor with the formation of carbon monoxide and hydrogen; the gaseous phase is partially removed for maintaining the process of pyrolysis, and the remaining part is mixed with condensed and isolated from water resin (see Alexeyev G. M., Petrov V. N., Shpilfogel P. V. Industrial methods of sanitary cleaning of cities.-L. Stroyizdat, 1983, p. 14-15).
Disadvantages, associated with this method are the following: high power consumption as a result of high temperatures (up to 1500.degree. C.) existing in the reactor; technical difficulties, arising in the process of isolation of resin from water; and great outflow of toxic substances into the surroundings.
The most similar to the invention is a method of processing waste rubber, taken as prototype, according to which pyrolysis of waste is carried out in the medium of heat carrier-arenaceous quartz; solid phase is isolated, liquid and gaseous phases are separated by condensation and the gaseous phase is removed and burnt for maintaining the process of pyrolysis (see Palgunov P. P, Sumarockov M. V. Utilization of Industrial Waste.-M. Stroyizdat, 1990, p. 165-166).
The disadvantages of this method are the following: high power consumption (specific heat consumption is 12.5 megajoules/kg); high temperature of the process (T=500.degree.-700.degree. C.) that makes it necessary to use special heat-resisting steels in pyrolysis plants; a large amount of combustion products introduced into the atmosphere (outflow of products of combustion is 2.5 kg/kg of the waste subjected to pyrolysis); great danger of explosion of gases of pyrolysis due to a large amount of hydrogen in them (hydrogen content in pyrolysis gas is 48-52%).
SUMMARY OF THE INVENTION
This invention is aimed at reducing power consumption and lowering the amount of harmful outflow into the surroundings during the process of obtaining fuel from waste rubber.
The aim is achieved by this method of processing waste rubber, including pyrolysis of waste in the medium of a heat carrier, isolation of solid phase, separation of liquid and gaseous phases by condensation and removing and burning of gaseous phase for maintaining the process of pyrolysis. Superheated water vapor is used as the heat carrier and the quantity of superheated water vapor is 18-110% of the mass of waste. The solid phase after separation is ground to particles of 0.001-0.210 mm, liquid phase is separated together with vapor and mixed with 23.0-55.8% of ground solid phase to obtain liquid fuel.
It is known (see Alexeyev G. M., Petrov V. N., Shpilfogel P. V. Industrial Methods of Sanitary Cleaning of Cities.-L. Stroyizdat, 1983, p.44-45), that the process of pyrolysis of waste rubber begins at T=400.degree. C. and ends at T=500.degree. C., therefore the temperature in the reactor must range from 400.degree. to 500.degree. C. For keeping such a temperature level in the reactor a certain amount of superheated water vapor is needed.
As waste rubber is heated by the warmth of the superheated water vapor, and the temperature of the superheated water vapor is in fact 100.degree.-1600.degree. C., then the maximum quantity of the superheated water vapor necessary for heating the waste to T=400.degree.-500.degree. C is 18-110% of the mass of the waste subject to pyrolysis.
If less than 18 mass percent of superheated water vapor is used, waste rubber will not be heated to T=400.degree. C. (it will be heated to a lower temperature) and the process of pyrolysis will not occur.
If more than 110 mass percent of superheated water vapor is used waste rubber will be heated to more than 500.degree. C. wh
REFERENCES:
patent: 25160 (1859-08-01), Hall
patent: 866758 (1907-09-01), Wheeler et al.
patent: 4707248 (1987-11-01), Silva et al.
Palgunov, P.P. et al. Utilization of Industrial Waste, M. Stroyizdat pp. 165-166, 100, 1990.
Alexeyeu, G.M. et al. Industrial Methods of Sanitary Cleaning of Cities-L. Stroyizdat pp. 44-45, 14-15, 1983.
Grigoryev, V.A. et al, Theoretical Basis of Heat Engineering-Reference Book Energoizdat (1988) p. 373.
Petukhov, B.C. Reference Book on Heat Exchangers, Energoizdat, 1987, p. 211, Table 1.
Isachenko, V.P. et al. A.C. Heat Transmission, Engergoizdat, 1981 p. 401 table 3.
Drozdov Vladimir Nikolaevich
Grebenkov Anatoly Shzoresovich
Konstantinov Valery Grigorjevich
Kuharev Anatoly Vasiljevich
Mulyarchik Valery Vladimirovich
Science-Technical and Product-innovative Center "Tokema"
Sellers Robert E.
LandOfFree
Processing waste rubber by steam pyrolysis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Processing waste rubber by steam pyrolysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing waste rubber by steam pyrolysis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1882278