JP2014180647A - Storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage container which is the container to store wastes and the like enabling the emission of the volatile gas of the wastes and the like such as waste cloths and the like containing a VOC and which can be inexpensively produced and prevent the leakage of the volatile gas from the container with a comparatively simple mechanism.SOLUTION: A storage container (1) comprises: a storage container body (10); an intermediate chamber (11) located at the upper part of the body; a freely openable and closable lid (12) located at the upper part of the intermediate chamber; shielding films (13 and 14) respectively having valve function parts (13a and 14a) between the storage container body (10) and the intermediate chamber (11) and between the intermediate chamber (11) and the lid (12); and a suction unit (15) to suck an atmosphere in the intermediate chamber from the intermediate chamber (11). The suction unit (15) sucks the atmosphere interlocking with the opening and closing of the lid (12) when at least the lid (12) is opened or closed.

Description

  The present invention relates to a storage container having a function capable of preventing leakage of volatile gas.

  There are various types of air pollutants. In particular, the situation of air pollution related to photochemical oxidants is still serious, and there are still many reports of health damage caused by photochemical oxidants, and it is necessary to deal with them urgently. Photochemical oxidants are also deeply involved in the production of microparticulates (PM2.5), which have newly established environmental standards. One cause of photochemical oxidants is volatile organic compounds (VOC). VOC is a general term for organic compounds that are volatile and become gaseous in the atmosphere, and include a wide variety of substances such as toluene, xylene, and ethyl acetate.

  In addition to the regulation of hydrocarbon emissions from automobiles, VOC emissions need to regulate the emission and scattering of VOCs from fixed sources such as factories, and there is a need to strengthen emission regulations even in factories that use VOCs. It has been pointed out. In particular, in small and medium factories, VOC is used as a cleaning solvent, and VOC is diffused into the atmosphere from waste such as waste containing VOC after use. Such VOCs diffused into the atmosphere not only cause causative substances such as photochemical oxidants, but also have the problem of harming the factory working environment.

JP-A-11-208801

  Until now, waste such as waste containing VOCs after use has been stored and stored in containers for storing used waste, but in some cases, containers without lids may be used. Dissipates VOCs into the atmosphere. In addition, in small and medium factories, it is difficult to introduce expensive equipment for storing and processing waste such as waste including VOC after use from the viewpoint of economy.

  There is no known containment vessel that specializes in waste such as waste containing VOCs after use and can suppress or prevent the emission of VOCs into the atmosphere. Although it is not specialized for waste such as waste containing VOC after use, Patent Document 1 discloses a trash box with a deodorizing function for preventing environmental pollution due to bad odor or the like. This trash box with a deodorizing function is characterized in that an adsorptive deodorizing photocatalytic member is installed, and it is also described that a lid is installed. However, in a container for storing waste that can dissipate volatile gas such as waste such as waste containing VOC, according to the study by the present inventors, a large amount of volatilization occurs when the container lid is opened and closed. The release of sex gases was observed. That is, it has been found that it is a problem to suppress the diffusion of volatile gas when the container lid is opened and closed before the adsorption deodorizing photocatalyst member is installed and volatile gas is adsorbed.

  Therefore, the present invention is a container for storing wastes that can dissipate volatile gases such as wastes such as waste containing VOCs, and can be manufactured at a low cost with a relatively simple mechanism. An object of the present invention is to provide a storage container that can prevent leakage of gas from the container.

The present invention is a storage container body (10),
An intermediate chamber (11) provided at the top of the main body,
It has an openable / closable lid (12) provided at the top of the intermediate chamber,
Between the storage container body (10) and the intermediate chamber (11) and between the intermediate chamber (11) and the lid (12), a shielding film (13a, 14a) having a valve function (13a, 14a), respectively. 14)
A suction device (15) for the atmosphere in the intermediate chamber from the intermediate chamber (11), and the suction device (15) is linked to the opening and closing of the lid (12) at least when the lid (12) is opened and closed. It is related with a storage container (1).

  According to the present invention, a container for storing wastes and the like that can dissipate volatile gases such as wastes such as waste containing VOC, and can prevent leakage of volatile gases from the container Can be provided. Furthermore, the storage container of the present invention has a relatively simple mechanism, and therefore can be manufactured at low cost, and can be spread in small and medium factories.

The model explanatory drawing of the storage container of this invention. The production of the experimental apparatus of Reference Example 1 and the outline of the experimental system are shown. The experimental result of the reference example 1 is shown. The experimental apparatus and results of Reference Example 2 are shown. The experimental apparatus and results of Reference Example 3 are shown. The experimental apparatus and results of Reference Example 4 are shown. The experimental apparatus and results of Reference Example 5 are shown. The experimental apparatus and results of Reference Example 6 are shown.

The storage container (1) of the present invention will be described with reference to FIG.
The storage container main body (10) constituting the storage container (1) of the present invention and the intermediate chamber (11) provided at the top of the main body (10) are hermetically sealed except for the portion provided with the shielding film (13, 14). It is a container main body and an intermediate chamber.

  Between the storage container body (10) and the intermediate chamber (11), there is a shielding film (13) having a portion (13a) having a valve function. The shielding film (13) shields the storage container body (10) and the intermediate chamber (11), and has a sealing property except for the portion (13a) having a valve function. The shielding film (13) can be made of, for example, a film or sheet material made of a material such as a vinyl chloride resin or a polyethylene resin that is not easily altered by an organic solvent. The portion (13a) having a valve function can be a plurality of cuts into the shielding film (13). As shown in FIG. 1, by providing a plurality of cuts (three in the figure) that intersect at one point in the shielding film (13), a force (restoring force) that tries to maintain the shape originally possessed by the shielding film is obtained. A valve function can be provided by utilizing the flexibility of the shielding film. The number and shape of the plurality of cuts into the shielding film (13) can be appropriately determined in consideration of the required valve function, the material and flexibility of the shielding film, and the like.

  A shielding film (14) having a portion (14a) having a valve function is also provided between the intermediate chamber (11) and the lid (12). The shielding film (14) having the part (14a) having a valve function can be the same as the shielding film (13) having the part (13a) having a valve function. The lid (12) is preferably a lid that opens and closes by sliding in a substantially horizontal direction from the viewpoint of preventing leakage of volatile gas from the intermediate chamber (11). For example, the lid (12) can be opened and closed in a substantially horizontal direction by stepping on a lid opening / closing pedal that is mechanically interlocked with the lid (12). Alternatively, the sliding opening and closing of the lid (12) in the substantially horizontal direction can be performed electrically, for example. Although not shown, it can be opened and closed by operating an electric opening / closing switch on the lid (12).

  The suction device (15) is a device that sucks the atmosphere in the intermediate chamber from the intermediate chamber (11), and the suction device (15) is interlocked with the opening and closing of the lid (12) at least when the lid (12) is opened and closed. Aspirate the atmosphere. When the lid (12) is opened and closed by pressing the lid opening / closing pedal that is mechanically linked, suction into the suction device (15) is performed. This can be done with a piston that works with the pedal. In addition, when the lid (12) is electrically opened and closed, the pump that can perform suction into the suction device (15) is operated by operating the electric opening and closing switch of the lid (12). You can do it.

  The storage container (1) of the present invention can further include a pipe for returning the atmosphere in the intermediate chamber (11) sucked by the suction device (15) to the storage container body (10). The atmosphere sucked by the suction device (15) is preferably returned to the storage container main body (10) from the viewpoint of preventing dissipation of the sucked atmosphere. Furthermore, it is preferable that the piping communicates with the upper space of the storage container body (10). The atmosphere sucked by the suction device (15) can be returned to the upper space of the storage container body (10), and the high concentration volatile gas that may exist in the lower part of the storage container body (10) is transferred to the intermediate chamber. It is preferable from the viewpoint of preventing movement and, as a result, suppressing the amount of volatile gas dissipated from the storage container of the present invention.

  The storage container (1) of the present invention is for storing articles capable of generating volatile gas in the storage container main body (10), and the atmosphere in the intermediate chamber (11) contains the volatile material. A gas may be contained, and the suction device may be provided with a device for adsorbing and / or decomposing the volatile gas. Although an apparatus for adsorbing and / or decomposing volatile gas is not shown, it is an adsorbing apparatus filled with an adsorbent for volatile gas or a decomposing apparatus filled with a catalyst capable of decomposing the volatile gas. be able to. As the adsorbent for the volatile gas, an adsorbent such as activated carbon can be appropriately used depending on the type of the volatile gas. For the decomposition of the volatile gas, a catalyst is preferably used. As the catalyst, for example, a photocatalyst having a decomposition activity for the volatile gas can be used.

  Inventing the storage container of the present invention, the present inventors have conducted various experiments shown below, and have arrived at the present invention based on the results.

Reference example 1
VOC Leakage Experiment by Opening and Closing the Waste Case Lid The experimental method shown in FIG. The summary of the experimental results will be described later (the same applies hereinafter). The experimental method is as follows. Place 12 mL of toluene in a beaker with an opening diameter of 10 cm at a position of 12 cm from the bottom of the experimental waste cloth holder. Opened and allowed to stand for 10 minutes, and the toluene concentration was measured with an infrared VOC measuring device.

Reference example 2
Experiments on leakage of VOCs by shielding film at the opening of the waste cloth The results shown in FIG. The experimental method is as follows. A shielding film was placed in the opening of the lid, and toluene was diffused in the same manner as in Reference Example 1, and the toluene concentration was measured immediately above the notch of the shielding film for 10 minutes 90 minutes immediately after the start of spreading.

Reference example 3
VOC leakage experiment with hand in and out of waste cloth The result shown in FIG. 5 was obtained by the experimental method shown in FIG. The experimental method is as follows. Under the condition where the shielding film of Reference Example 2 was installed, the lid was opened directly or by sliding, the hands were taken in and out, and the leakage of toluene for 10 minutes was examined.

Reference example 4
VOC decomposition experiment (1)
The results shown in FIG. 6 were obtained by the experimental method shown in FIG.
The experimental method is as follows. Toluene was released under the conditions of Reference Example 1, the top air was sucked with a mini pump while the lid was closed, and introduced into a cylindrical processing device (photocatalytic decomposition device) where a photocatalyst was placed. Returned to the bottom of the body. The suction flow rate was 0.2 L / min, and measurement was performed for 10 minutes. (* This result shows that the concentration in the upper part does not decrease at all even if the gas after treatment is returned to the lowest part.)

Reference Example 5
VOC decomposition experiment (2)
The results shown in FIG. 7 were obtained by the experimental method shown in FIG.
The experimental method is as follows. Under the conditions of Reference Example 4, toluene was decomposed and returned to the upper part of the container body. (* This result showed that the toluene concentration decreased and the CO ₂ concentration increased, so it was found that a part of it was decomposed. However, the performance was insufficient. .)

Reference Example 6
VOC decomposition experiment (3)
The results shown in FIG. 8 were obtained by the experimental method shown in FIG.
The experimental method is as follows. The shielding film of Reference Example 2 was placed 10 cm below the lid, and the decomposition treatment was performed by sucking the layer between the lid and the shielding film. (* This result shows that the toluene concentration can be lowered sufficiently even with a photocatalyst if it is a method that decomposes a small amount of toluene leaking from the waste container main body through a shielding film.)

From the results of Reference Examples 1 to 6, the following knowledge was obtained.
(i) VOC leakage prevention effect by sliding lid (Reference Example 1)
・ Significant reduction of peak concentration ・ Leakage amount is reduced to 1/2
(ii) VOC leakage prevention effect by installing a shielding sheet (Reference Example 2)
・ Leakage volume reduced to 1/10 or less
(iii) By providing a buffer layer by installing the inner sheet (Reference Examples 4 and 6)
・ VOC leakage decreased to 1/3 (* This result is a comparison between data without a disassembly treatment performed as a preliminary experiment in the experiments of Reference Examples 4 and 6. Not shown.)
(iv) By combining the above and decomposing the VOC in the buffer layer externally (photocatalytic decomposition), the VOC in the buffer layer can be maintained at a low concentration (Reference Examples 4 to 6).

  The present invention provides a storage container (waste waste container (container)) effective in preventing VOC leakage.

Claims (7)

Storage container body (10),
An intermediate chamber (11) provided at the top of the main body,
It has an openable / closable lid (12) provided at the top of the intermediate chamber,
Between the storage container body (10) and the intermediate chamber (11) and between the intermediate chamber (11) and the lid (12), a shielding film (13a, 14a) having a valve function (13a, 14a), respectively. 14)
A suction device (15) for the atmosphere in the intermediate chamber from the intermediate chamber (11), and the suction device (15) is linked to the opening and closing of the lid (12) at least when the lid (12) is opened and closed. Aspirate,
Storage container (1). The storage container (1) is for storing articles capable of generating volatile gas in the storage container body (10), and the volatile gas is contained in the atmosphere in the intermediate chamber (11). The storage container according to claim 1, wherein the suction device is provided with a device for adsorbing and / or decomposing the volatile gas. The storage container according to claim 1 or 2, wherein the shielding film (13, 14) having a portion (13a, 14a) having a valve function has a plurality of cuts into the shielding film. The storage container according to any one of claims 1 to 3, wherein the lid (12) is a lid that opens and closes by sliding in a substantially horizontal direction. The apparatus for adsorbing and / or decomposing the volatile gas is an adsorption apparatus filled with an adsorbent for the volatile gas, or a decomposing apparatus filled with a catalyst capable of decomposing the volatile gas. 5. The storage container according to any one of 1 to 4. The storage container according to any one of claims 1 to 5, further comprising a pipe for returning the atmosphere in the intermediate chamber (11) sucked by the suction device (15) to the storage container body (10). The storage container according to claim 6, wherein the pipe communicates with an upper space of the storage container body (10).