JP2005118745A - Apparatus for decomposing gas to be decomposed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for decomposing the gas to be decomposed which can be used economically by simplifying the exchange procedure required in the long-term operation of this apparatus and can cope easily with a responsible case of increasing/decreasing the throughput capacity at request. <P>SOLUTION: This apparatus for decomposing the gas to be decomposed is provided with: a chlorine gas introducing means for generating chlorine gas; a vessel for housing a gaseous mixture of the chlorine gas with the gas to be decomposed and; a light source for irradiating the gaseous mixture in the vessel with light. The vessel having an inlet for introducing the gaseous mixture and an outlet for discharging the decomposed gas is integrated with the light source. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a decomposition apparatus that decomposes a mixed gas in which chlorine gas and decomposition target gas are mixed by light irradiation.

So far, a decomposition apparatus and method for decomposing a mixed gas in which chlorine gas and decomposition target gas are mixed by light irradiation have been introduced (Patent Document 1). Such a technique can decompose a gas to be decomposed, more specifically, a chlorinated organic solvent such as trichlorethylene. The mixed gas contains chlorine gas, and it is considered that the chlorine gas generates radicals by light irradiation, the radicals act on the gas to be decomposed, and the gas to be decomposed is chain-decomposed.
JP 2002-153753 A

  When contacted with a mixture of chlorine-based solvent and chlorine gas, which is the object of decomposition, and exposed to light, it is desirable that the container material has acid resistance, chlorine resistance, solvent resistance, and UV resistance performance, but the equipment cost is reduced. Increase significantly. However, for economic reasons, if long-term corrosion resistance is not expected, it is sufficient to construct the container with materials such as acid- and chlorine-resistant vinyl chloride, but before the container swells with solvents etc. and deteriorates with ultraviolet rays It needs to be replaced regularly or irregularly.

  On the other hand, in the groundwater contamination countermeasures, the spread of contamination that cannot be expected at the time of the survey may be detected only at the time of ground purification. The processing capacity to be changed can be significantly changed. In such a case, there is a possibility that the groundwater purification plan will be reviewed due to the additional production of the decomposition device, etc., which may hinder the implementation of the purification plan.

  The present invention simplifies and economically operates a replacement procedure required for long-term operation of a gas decomposition apparatus for containers composed of economical materials, and easily adapts to changes in processing capacity. An object of the present invention is to provide a gas decomposition apparatus capable of decomposition.

  In the present invention, a decomposition comprising chlorine gas introducing means for generating chlorine gas, a container for storing a mixed gas of the chlorine gas and a substance gas to be decomposed, and a light source for irradiating the mixed gas in the container with light. In a target gas decomposition apparatus, there is provided a decomposition target gas decomposition apparatus characterized by a structure in which the container having an inlet for introducing a mixed gas and an outlet for discharging a gas and the light source are integrated.

  The present invention also provides a decomposition apparatus for a target gas for decomposition, in which the apparatus is a single unit and a plurality of the units are installed and connected continuously.

  According to the present invention, it is possible to simplify the replacement procedure required for long-term operation and to operate the apparatus economically, and to easily cope with a change in required processing capacity.

  The present embodiment is characterized in that a container which is a reaction space is integrated with a light source to constitute a unit, and a plurality of the units are installed and continuously connected so that addition, reduction, part or all of the units can be replaced.

  FIG. 1 schematically shows one form of a decomposition target gas decomposition apparatus according to this embodiment. Reference numeral 1 is a container, 2 is a light source, 3 is an inlet, and 4 is an outlet.

  The container shape is cylindrical, and a light irradiation portion of one light source lamp having a smaller cylindrical shape is arranged along the central axis, and the end portion is in close contact with the container to form one unit. A plurality of light source lamps can be installed in one unit, but the configuration of one light source lamp in one unit is more preferable because of easy replacement.

  An inlet 3 is disposed at one end of the container 1 and an outlet 4 is disposed at the other end, and gas is introduced into the container 1.

  The introduced gas is a mixed gas of the gas to be decomposed and chlorine gas. However, in the present invention, a method for generating chlorine gas, a method for mixing with the gas to be decomposed, and mixing with other gases such as oxygen. Further, it does not matter whether or not the processing gas exiting from the outlet 4 is introduced and circulated to the inlet 3 and the circulation method.

  Chlorine radicals are generated from chlorine gas by light having a wavelength of 300 nm or more and 500 nm or less, preferably 350 nm or more and 450 nm or less, emitted from the light source, and the decomposition target gas undergoes a chain reaction with the chlorine radicals and decomposes.

  In order to efficiently perform the radicalization of chlorine gas and the decomposition target gas, the light source lamp and the mixed gas are sufficiently brought into contact with each other. Since the container and the light source are integrated and are assumed to be replaced with the lifetime of the light source, it is economically preferable to manufacture the container from a resin material such as vinyl chloride.

  FIG. 2 is a schematic diagram showing one configuration of the decomposition target gas decomposition apparatus according to the present embodiment. Reference numeral 5 is a first stage reaction unit, 6 is a second stage reaction unit, and 7 is a third stage reaction unit. Although FIG. 2 shows a case where the number of reaction unit stages is three, the number of stages is not limited in the present invention. 8 is a connection part between reaction units, and is a part which introduce | transduces gas from the exit of a front | former stage to the entrance of a back | latter stage.

  In FIG. 2, a plurality of units having the same shape as in FIG. 1 can be installed, the first stage outlet can be connected to the second stage inlet, and the front stage outlet can be connected to the rear stage inlet in the same manner. Such a series arrangement of units can increase or decrease the number of stages according to the amount of gas to be decomposed. Also, a plurality of units having the same shape as described above can be installed, and the inlets of each unit can be connected via a header to form one inlet, and the outlets of each unit can be connected to form one outlet. Such units can also be arranged in parallel.

  When units are arranged in series. The first stage deterioration may be more severe than the latter stage. In such a case, only the first-stage unit needs to be replaced, and there is no need to replace or repair the entire device.

It is the schematic diagram which showed the structure of 1 unit of the decomposition target gas decomposition apparatus which concerns on this Embodiment. It is a schematic diagram of the apparatus comprised by connecting the unit shown in FIG. 1 about the decomposition | disassembly object gas decomposition apparatus which concerns on this Embodiment.

Explanation of symbols

1 container 2 light source 3 gas inlet (inlet)
4 Gas outlet (exit)
5 1st stage reaction unit 6 2nd stage reaction unit 7 3rd stage reaction unit 8 Inter-unit gas moving part (connection part)

Claims (2)

  Decomposition target gas decomposing apparatus, comprising: a chlorine gas introducing means for generating chlorine gas; a container for storing a mixed gas of the chlorine gas and a decomposition target substance gas; and a light source for irradiating light to the mixed gas in the container The decomposition target gas decomposition apparatus characterized in that the container having the inlet for introducing the mixed gas and the outlet for discharging the gas and the light source are integrated.   A gas decomposition apparatus to be decomposed in which a plurality of apparatuses according to claim 1 are installed and continuously connected.

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