Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Patent
1998-06-24
2000-05-23
McKane, Elizabeth
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
422120, 422182, 454 53, 165 4, 165 47, 165 97, 118 61, F01N 310
Patent
active
060663014
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a deodorizing system for removing odors generated in a thermal equipment which utilizes a gas current having a relatively-medium/low temperature in a hot-air drier or a foaming oven as a heat source to carry out a predetermined process.
BACKGROUND OF THE INVENTION
A deodorizing system such as shown in FIG. 5 has been conventionally adopted in a process for removing gas (referred to as odor gas) including odor components generated in a foaming oven or a hot-air drier such as a paint drying oven. The deodorizing system comprises: a hot blast stove 102 for supplying hot air having a medium/low temperature; a thermal equipment 101 such as a hot-air drier or a foaming oven for utilizing hot air supplied from the hot blast stove 102 to effect predetermined drying or foaming process on a work W; and a deodorizing furnace 103 which takes out and burn or heat-decomposes the odor gas generated in the thermal equipment 101 for deodorization. Here, hot air having a medium/low temperature, e.g., approximately 300.degree. C. required in the thermal equipment 101 is generated in the hot blast stove 102, and atmosphere gas or flames having a high temperature, e.g., approximately 1000.degree. C. required for burning or heat-decomposing the odor gas components is formed in the deodorizing furnace 103.
The odor gas generated in a paint drying oven or a foaming oven, however, includes a large quantity of mist before deodorization and this mist is high-temperature gas including a large amount of carbonized dust after deodorization, whereby heat recovery becomes difficult. Even though a heat exchanger is used to carry out heat recovery, the heat exchanger may soon be out of service and the heat efficiency is low. Thus, the high-temperature gas generated in the deodorizing furnace is not subjected to the effective heat utilization and it is directly exhausted. A difference in temperature between the heat required in the thermal equipment and the heat required for deodorization is not less than approximately 700.degree. C., and hence a common heat source can not be used. Two different heat sources must be prepared for the hot blast stove and the deodorizing furnace, thereby taking a large space and increasing the facility cost.
DISCLOSURE OF THE INVENTION
It is, therefore, an object of the present invention to provide a deodorizing system having a compact equipment and a thermal efficiency that is much higher than that in the prior art.
To achieve this aim, the present invention provides a deodorizing system for removing odor components generated from a thermal equipment which utilizes a gas current having a medium/low temperature as a heat source, comprising: a thermal equipment; a deodorizing furnace provided with a burner which mixes gas including the odor components emitted from the thermal equipment into a flame and burns it; and an out-of-furnace circulating path which includes a circulating passage connected to the thermal equipment, a circulating fan and the deodorizing furnace through a pair of circulating openings, takes out combustion exhaust gas from the deodorizing furnace to the outside of the furnace through one circulating opening and passes the combustion exhaust gas through the thermal equipment to flow back into the deodorizing furnace through the other circulating opening. Further, the out-of-furnace circulating path comprises regenerators provided to positions dose to the pair of circulating openings of the deodorizing furnace, respectively, and a passage switching device for periodically switching a direction of a gas current between the circulating fan and the regenerators. Burning the burner and changing over the passage switching device periodically switch a direction of the gas current to the deodorizing furnace, and the combustion exhaust gas taken out from the deodorizing furnace is turned into the hot air having a medium/low temperature required for the thermal equipment through the regenerators and it is then fed to the thermal equipment.
Maehara Kanako
Matsuo Mamoru
Oshima by Rie
Tanaka by Hiroko
Tanaka by Shinichi
McKane Elizabeth
Nippon Furnace Kogyo Kabushiki Kaisha
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