JPH079291B2 - Deodorizer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorizing device for deodorizing a first treated gas having a high odor component concentration and a second treated gas having a low odorous component concentration.

[Conventional technology]

Conventionally, both the first and second gases to be processed are directly sent to the combustion chamber of the combustion type deodorizing device so that the odorous components are oxidatively decomposed at a high temperature of about 850 ° C. or higher, or
Both the second and the second gas to be treated are preheated to about 300 to 500 ° C. and sent to the catalytic deodorizing device so that the odorous components are oxidatively decomposed by the action of the catalyst.

[Problems to be solved by the invention]

However, in the former direct combustion method, the gas to be treated must be heated to an extremely high temperature, so if the concentration of odorous components in the gas to be treated is low, the amount of heat energy consumed will be enormous, but the treatment of odorous components will be large. However, if the amount of the second gas to be treated is large, the operating cost is high.

Further, in the latter catalyst system, since the rate of oxidative decomposition by the catalyst is slow, if the odor component concentration of the gas to be treated is high, a large amount of expensive catalyst is required for sufficient odor treatment, and the first catalyst There is a drawback that the equipment cost is high due to the processing gas.

An object of the present invention is to enable deodorization treatment of both the first treated gas having a high odorous component concentration and the second treated gas having a low odorous component concentration, both in terms of equipment costs and operating costs.

[Means for solving problems]

A characteristic configuration of the present invention is that a direct combustion type deodorizing device for oxidizing and decomposing an odor component in a combustion chamber is connected to a supply pipe line for a first processed gas having a high odor component concentration, and an exhaust path of the direct combustion type deodorizing device. To the mixer connected to the second gas to be treated having a low odorous component concentration, and to the mixed gas supply line from the mixer is connected a catalytic deodorizing device for oxidizing and decomposing the odorous component by a catalyst. However, the heat exchanger that heats the mixed gas sent from the mixer to the catalytic deodorizing device by the exhaust gas from the catalytic deodorizing device is provided, and the function and effect thereof are as follows.

[Action]

That is, only the first treated gas having a high odor component concentration is processed by the direct combustion type deodorizing device having high deodorizing efficiency, and the second treated substance having a low thermal energy efficiency in the direct combustion type deodorizing device because of the low odor component concentration. By not supplying gas to the direct combustion type deodorizing device, the fuel cost required for the direct combustion type deodorizing process can be reduced.

Then, only the second gas to be treated, which has a low odor component concentration, is processed by the catalytic deodorizing device which is advantageous in terms of thermal energy, and the catalytic deodorizing process requires a large amount of expensive catalyst because of the high odor component concentration. (1) By not treating the gas to be treated with the catalytic deodorizing device, the cost required for the catalyst can be reduced.

Moreover, the first and second treated gases are not separately treated, but the high-temperature exhaust gas from the direct combustion deodorizing device is mixed with the second treated gas in the mixer, and the second treated gas is exhausted. By preheating the treated gas and further preheating the mixed gas containing the second treated gas by high-temperature exhaust from the catalytic deodorizer in the heat exchanger, the heat recovery efficiency can be sufficiently increased, and The synergistic effect with cost reduction can reduce the operating cost sufficiently.

〔The invention's effect〕

As a result, it has become possible to provide a deodorizing device which is economically advantageous, which is low in catalyst cost and is advantageous in equipment cost, and which is low in thermal energy cost and which is advantageous in operating cost.

〔Example〕

 Next, an embodiment will be described with reference to the drawings.

The burner (3
It is connected to a direct combustion type deodorizing device (3) that oxidizes and decomposes odorous components in the combustion chamber of a), and is configured to deodorize the first gas to be treated at about 750 ° C or higher.

Supply of the second processed gas by connecting the mixer (5) to the exhaust passage (4) of the direct combustion type deodorizing device (3) and connected to the source (6) of the second processed gas having a low odor component concentration The pipe line (7) is connected to the mixer (5), and the high temperature exhaust gas and the second processed gas are mixed in the mixer (5) to preheat the second processed gas.

The catalytic deodorizing device (11) that oxidatively decomposes odorous components by the filter (9), the heat exchanger (10), and the catalyst (11a) is installed in the mixed gas supply passage (8) from the mixer (5) as far as the upstream. The exhaust passage (12) of the catalytic deodorizing device (11) is connected to the heat exchanger (10), and dust and tar in the mixed gas that cause catalyst deterioration are filtered (9). And preheat the mixed gas by high-temperature exhaust from the catalytic deodorizer (11) in the heat exchanger (10) and deodorize the second gas to be treated with the catalyst (11a) at about 300 to 500 ° C. It is configured to do.

An on-off valve (V) is provided in the second processing target gas supply pipe (7), and the on-off valve (V) is closed to directly burn the deodorizing device (3).
A high temperature gas is supplied to the filter (9) to remove dust and tar adhering to the filter (9) by incineration.

[Another embodiment]

 Next, another embodiment will be described.

The types of the first and second gas to be treated are not limited, and are, for example, cacao bean odor gas or the like generated in various steps of a chocolate manufacturing factory. It is particularly preferable that the first processed gas is small and the second processed gas is large.

The direct combustion type deodorizing device (3) can be appropriately selected in terms of structure, kind of fuel, heating temperature and the like.

The types of the mixer (5), the filter (9) and the heat exchanger (10) can be appropriately selected, and the filter (9) can be arranged in the second treatment gas supply pipe (7), or It may be omitted.

The catalyst type deodorizing device (11) can be appropriately selected depending on the structure, the type of the catalyst (11a), the treatment temperature, and the like, and a platinum-palladium-based catalyst (11a) is generally used. Moreover, you may attach a preheater.

The overall configuration of the deodorizing device and the piping configuration can be changed appropriately.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings are flow sheets showing an embodiment of the present invention. (2) ...... First treated gas supply pipeline, (3) ...... Direct combustion type deodorizing device, (4) ...... Exhaust passage, (5) ...... Mixer, (7) ...... Second treated gas Supply line for process gas, (8) ……
Mixed gas supply path, (10) …… heat exchanger, (11) …… catalytic deodorizer, (11a) …… catalyst.

Claims (1)

[Claims] 1. A deodorizing device for deodorizing a first processed gas having a high odor component concentration and a second processed gas having a low odor component concentration, which is used in a direct combustion type deodorizing device (3) for oxidizing and decomposing odor components in a combustion chamber. Supply pipe of the second processed gas to the mixer (5) connected to the supply line (2) of the first processed gas and connected to the exhaust path (4) of the direct combustion deodorizing device (3) The mixer (5) is connected to the mixed gas supply path (8) from the mixer (5), and the catalytic deodorizer (11) for oxidizing and decomposing odorous components by the catalyst (11a) is connected to the mixer (5). A deodorizing device provided with a heat exchanger (10) for heating the mixed gas sent from (5) to the catalytic deodorizing device (11) by exhaust gas from the catalytic deodorizing device (11).