Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Reexamination Certificate
1999-04-14
2001-09-25
Tran, Hien (Department: 1764)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
C422S171000, C422S172000, C422S184100, C110S215000
Reexamination Certificate
active
06294135
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a small-scale boiler system using scrapped tires, and more particularly, to a small-scale scrapped tire fired boiler system in which a high temperature combustion gas generated at the time of incinerating scrapped tires can be used for heating a small-scale facility such as a vinyl plastic hothouse, and the combustion gas can be effectively purified to thereby prevent an air pollution in advance.
2. Description of the Related Art
As automobile cars increase sharply, scrapped tires also increase in geometrical progression. Meanwhile, a scrapped tire usually consists of eight components having high energy including rubber, carbon, textile and steel. Since the energy included in a scrapped tire is above 8,000 kcal/kg higher than 6,000 kcal/kg which is the amount of heat of coal, the scrapped tire is of very high value as fuel.
When a tire is pyrolyzed, middle-classed oil between light oil and hard heavy oil and gas can be extracted at a ratio of five to one. Thus, the scrapped tire has been noted as industrial energy. As a result, various methods and apparatuses have been developed to utilize scrapped tires.
For example, scrapped rubber extracted from scrapped tires can be used as a mix when paving a road with asphalt. Also, energy generated at the time of incinerating scrapped tires is collected as a thermal source, to sharply reduce an energy cost. Further, when scrapped tires are pyrolyzed, middle-classed oil between gasoline and light oil is collected and used as fuel for a heat exchanger. At the same time, carbon black is separated from the scrapped tire and recycled at the time of manufacturing tires.
Here, when noxious, combustion gas containing sulfurous acid gas, nitrogen carbon monoxide, carbon dust, etc., which is generated at the time of obtaining thermal energy and other extracts from burning scrapped tires is leaked into atmosphere, severe air pollution may be caused.
Therefore, to prevent the air pollution, the combustion gas generated during burning the scrapped tires should be refired for perfect combustion. Otherwise, sulfurous acid gas (SO
2
) is made to react to water (H
2
O), to separate the sulfurous acid gas (SO
2
) from the combustion gas, and to then be discharged in the air, using the characteristic that the former melts well by the latter.
However, in the case of the above wet removal method, combustion gas should pass through a large-scale charging material layer in order to make the combustion gas generated in a burning furnace react well to water. Thus, since it is not easy to develop a small-scale wet apparatus, the wet removal method has not been appropriate for a small-scale heating.
Also, a dry removal method using adsorption of a solid state of noxious gas requires a facility such as a very expensive air purifier. Thus, the dry removal method has not been developed for small-scale equipment.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide a small-scale boiler system having an exhaust gas purifier which can effectively purify sulfurous acid gas, carbon dust, etc., contained in combustion gas (exhaust gas) when high temperature combustion gas generated by burning scrapped tires is applied to a small-scale heating.
It is another object of the present invention to provide a small-scale boiler system which quickly performs perfect combustion of nitrogen carbon monoxide which is increasingly generated at the last stage of the combustion, to then reduce an amount of discharged nitrogen carbon monoxide and shorten an ash processing period.
To accomplish the above object of the present invention, there is provided a small-scale scrapped tire boiler system for heating a small-scale facility to be heated using heat generated during burning scrapped tires, the small-scale boiler system comprising: a scrapped tire burner furnace for burning the scrapped tires and producing high-temperature combustion gas; a heat exchanger for heating a heat transfer medium by the high-temperature combustion gas generated in the burner to perform heat exchange with the cooled heat transfer medium fed back from the facility to be heated and supplying the heated heat transfer medium to the facility to be heated; and an exhaust gas purifier for purifying sulfurous acid gas and carbon dust contained in exhaust gas discharged in the air via the heat exchanger.
It is preferable that the exhaust gas purifier comprises: an exhaust gas tower having a vertical path to discharge the combustion gas having passed through the heat exchanger; a water sprayer for spraying water from the upper side of the exhaust gas tower in such a manner that the sulfurous acid gas contained in the discharged combustion gas is made to melt to water and the carbon dust is made to adsorb to fall down; and a neutralizer for precipitating sulfurous acid gas components into alkali salts in a sulfurous acid aqueous solution where the sulfurous acid gas is dissolved to thereby neutralize water.
It is also preferable that the exhaust gas purifier comprises: an exhaust gas tower having a vertical path to discharge the combustion gas having passed through the heat exchanger; a water tank communicating with the bottom side of the exhaust gas tower and containing a certain amount of purifying water; a water sprayer for circulating the purifying water and spraying water from the upper side of the exhaust gas tower; a reaction accelerator disposed at the upper side of the exhaust gas tower, lengthening a reaction time between the combustion gas and the water in such a manner that sufficient time and contact area are kept so that the sulfurous acid gas contained in the discharged combustion gas is made to be dissolved to the sprayed water; and a limestone charging layer for precipitating the sulfurous acid produced from the sulfurous acid gas dissolved while having passed through the reaction accelerator into gypsum.
According to the present invention, the burner furnace comprises: a housing forming a combustion chamber in which scrapped tires are loaded; a first light oil inlet disposed in the upper portion of the combustion chamber, for injecting a combustible material; an air heating induction pipe disposed in the inner circumferential surface of the housing; a burner disposed in a connection path connected with a heat exchanger; and a return means for returning the air heated by the burner to the combustion chamber.
It is also preferable that the burner furnace further comprises a second injection inlet disposed in the lower portion of the combustion chamber, for injecting a combustible material, and a fan for injecting the input combustible material into the inside of the combustion chamber together with the external air.
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patent: 5885489 (1999-03-01), Horner et al.
Joo Seungki
Kim Yongchurl
Park Chang-won
Yoon Doyoung
Joo Seungki
McDermott & Will & Emery
Tran Hien
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