Method for deodorizing room affected by fire accident

Abstract

To deodorize a room affected by a fire accident.SOLUTION: A method for deodorizing a room affected by a fire accident includes a soot odor removal step for removing soot smell, where the soot odor removal step includes an ozone fumigation operation to spray ozone inside the room and a coating operation to apply a coating on the inner walls still containing soot.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a method for deodorizing a room where a fire has occurred. [Background technology]

[0002] The minimum concentration at which a fire or burnt odor can be detected is low. Therefore, even if only a small amount of soot, the main cause of the burnt odor, remains in the room, people can still smell it. For these reasons, there was a need for a way to deodorize rooms that have been hit by fires or fire scenes.

[0003] Patent Document 1 describes that the smell of smoke caused by a fire can be removed by uniformly spraying olive oil and vegetable vinegar.

[0004] Incidentally, ozone fumigation is known as a technique for removing odors generated indoors (Non-Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-226090 A [Non-patent literature]

[0006] [Non-Patent Document 1] "Ozone fumigation service", [online], Sankyo Airtech, [searched November 15, 2018], Internet <URL: https: / / www.sat.co.jp / service / kunjyou / > Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above prior art, the present invention aims to provide a method for deodorizing a room where a fire accident has occurred. [Means for solving the problem]

[0008] That is, the present invention that solves the above problem is a method for deodorizing a room where a fire has occurred, The method has a soot odor removal step for removing soot odor, The soot odor removing step includes: Ozone fumigation work involves spraying ozone into the room, A coating process in which paint containing activated carbon is applied to the inner walls on which soot remains; The deodorizing method is characterized by comprising: By using the above method, it is possible to remove the soot odor that is the cause of odor at the scene of a fire and deodorize the room where the fire occurred. In particular, by using the above method, it is possible to decompose dioxins, which are odorous components derived from soot, and it is possible to deodorize the room where the fire occurred.

[0009] In a preferred embodiment of the present invention, the ozone fumigation process is carried out at a temperature of 1 m 3 The present invention is characterized by using ozone in an amount of 6,500 mg or more per unit time. By using ozone in an amount equal to or greater than the lower limit, the room where the fire occurred can be deodorized more reliably. In particular, the above method can decompose dioxins, which are odorous components derived from soot, and can deodorize the room where the fire occurred.

[0010] In a preferred embodiment of the present invention, a soot reduction operation is carried out prior to the ozone fumigation operation, in which the inner walls of the room to which soot has adhered are scraped off. By carrying out soot reduction work by scraping off the soot-covered interior walls of the room before the ozone fumigation work, it is possible to more reliably deodorize the room where a fire accident occurred.

[0011] In a preferred embodiment of the present invention, the method further comprises a furniture removal step of removing furniture from within the room prior to the soot odor removal step. By removing the furniture from within the room before the soot odor removal step, the room where the fire occurred can be deodorized more reliably.

[0012] In a preferred embodiment of the present invention, a shower room is provided near the exit of the room where the fire occurred, and a contamination prevention step is included in which soot stains are removed with a shower when leaving the room. By carrying out the above-mentioned pollution prevention process, the spread of soot odor can be prevented. Effect of the Invention

[0013] According to the present invention, a method for more reliably deodorizing a room where a fire has occurred can be provided. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention will be described in detail below, but it goes without saying that the technical scope of the present invention is not limited to the following description.

[0015] The deodorization method according to the present embodiment targets a room where a fire has occurred. Here, the deodorization method according to the present embodiment can deodorize any room that has experienced a fire accident, whether it be an ordinary fire, an oil fire, an electrical fire, a metal fire, or a gas fire.

[0016] There is also no particular limit on the amount of time that has passed since the fire.

[0017] There is no particular restriction on the material of the room to be deodorized, and it may be made of either wood or concrete.

[0018] There is also no particular limitation on the type of room to be deodorized, and it may be any of a residence, apartment building, store, hotel, restaurant, factory, warehouse, and garage.

[0019] There is also no particular limit to the size of the room to be deodorized. For example, 3 More than 30m, preferably 30m 3 More than 60m, preferably 60m 3 Rooms of this size or larger can be deodorized. Also, 120m 3Less than or equal to 60m, preferably 3 The following rooms can be deodorized:

[0020] The deodorizing method according to this embodiment includes a contamination prevention step, a furniture removal step, and a soot odor removal step. Each step will be described in detail below.

[0021] (Contamination prevention process) The contamination prevention step is a step of preparing a shower room near the exit of the room where the fire occurred, and washing off soot stains with a shower when leaving the room. By carrying out the above-mentioned pollution prevention process, the spread of soot odor can be prevented.

[0022] Here, the shower room is not particularly limited in shape, size, and number, so long as it is capable of washing away soot adhering to the worker.

[0023] Moreover, it is particularly preferable that the shower room be provided at the exit of the room where the fire occurred.

[0024] (furniture removal process) Next, the furniture removal process will be described. The furniture removal process is a process for improving the work efficiency in the soot odor removal process, which will be described later, by removing furniture from within the room. By removing any furniture from the room, the room where the fire occurred can be deodorized more efficiently.

[0025] There are no particular limitations on the means for removing the furniture from the room, and for example, the furniture can be removed by hand.

[0026] Additionally, the removed furniture can be reused.

[0027] (Soot odor removal process) Next, the soot odor removing process will be described. The soot odor removing process is a process for reducing the soot odor, which is the main cause of odors at the scene of a fire, by removing soot from within the room.

[0028] The soot odor removal process of this embodiment includes a soot reduction operation, an ozone fumigation operation, and a coating operation. Each task will be explained in detail below.

[0029] (1) Soot reduction work Soot reduction work involves removing soot that has baked into the room. By carrying out soot reduction work, it is possible to more effectively deodorize rooms where fires have occurred.

[0030] A specific example of the soot reduction process is a method of removing burnt soot by scraping the inner wall with a grinder or steel wool.

[0031] (2) Ozone fumigation (2-1) Preparation (spraying enzyme-containing deodorant) In this embodiment, a deodorizer containing protease, lipase, amylase, and cellulase is sprayed before spraying ozone. By spraying a deodorizer containing enzymes, it is possible to more reliably deodorize a room where a fire has occurred.

[0032] Here, the enzymes contained in the deodorant do not necessarily have to be all of protease, lipase, amylase, and cellulase. For example, a deodorant containing one or more enzymes selected from protease, lipase, amylase, and cellulase, more preferably two or more enzymes, and even more preferably three or more enzymes, may be used.

[0033] In this embodiment, a chlorine-based deodorant is sprayed. By spraying a chlorine-based deodorant, the soot odor can be more reliably reduced. However, the deodorant in the present invention may be any of a chlorine-based deodorant, a hypochlorite-based deodorant, and a photocatalyst-based deodorant.

[0034] The deodorant may be in the form of a liquid, granules, or powder. Among these, the deodorant is preferably in the form of a liquid. By using a liquid, the soot odor can be more reliably reduced.

[0035] As an enzyme-containing deodorant containing the above enzyme, Gran Bio Pro (manufactured by Kai Corporation) can be preferably used.

[0036] In this embodiment, the surfactant is sprayed together with the deodorant. By using the surfactant and the deodorant together, the soot odor can be more reliably reduced. Here, the deodorant and the surfactant do not necessarily have to be used at the same time, and they may be applied either in a form in which the deodorant is applied and then the surfactant is applied, or in a form in which the surfactant is applied and then the deodorant is applied.

[0037] (2-2) Ozone fumigation Ozone fumigation involves spraying ozone into a room. Here, the amount of ozone used in ozone fumigation is 1 m 3 It is preferably 6500 mg or more, more preferably 7500 mg or more, even more preferably 8500 mg or more, and particularly preferably 9000 mg or more. By spraying ozone in an amount greater than the lower limit, the room where a fire has occurred can be deodorized more effectively. It is possible.

[0038] In addition, the amount of ozone used in ozone fumigation is 1 m 3 It is preferably 35,000 mg or less, more preferably 25,000 mg or less, even more preferably 20,000 mg or less, and particularly preferably 15,000 mg or less. Even if the amount of ozone used is below the upper limit, the soot odor can be sufficiently reduced.

[0039] The amount of ozone used will be described in more detail below.

[0040] (i) If all furniture has been removed during the furniture removal process The amount of ozone used when all furniture is removed during the furniture removal process is 1 m 3It is preferably 6500 mg or more, more preferably 7500 mg or more, even more preferably 8500 mg or more, and particularly preferably 9000 mg or more. By spraying an amount of ozone above the lower limit, it is possible to more reliably deodorize a room where a fire has occurred.

[0041] All furniture has been removed during the furniture removal process and the room size is 10m 3 ~30m 3 In this case, the amount of ozone used is preferably 30,000 mg or less, more preferably 25,000 mg or less, further preferably 22,000 mg or less, and particularly preferably 21,000 mg or less. All furniture has been removed during the furniture removal process and the room size is 10m 3 ~30m 3 In this case, even if the amount of ozone used is equal to or less than the upper limit, the soot odor can be sufficiently reduced.

[0042] In addition, all furniture has been removed during the furniture removal process, and the size of the room is 30 m 3 ~60m 3 In this case, the amount of ozone used is preferably 60,000 mg or less, more preferably 50,000 mg or less, further preferably 45,000 mg or less, and particularly preferably 43,000 mg or less. All furniture has been removed during the furniture removal process and the room size is 30m 3 ~60m 3 In this case, even if the amount of ozone used is equal to or less than the upper limit, the soot odor can be sufficiently reduced.

[0043] In addition, all the furniture has been removed during the furniture removal process, and the size of the room is 60 m 3 ~120m 3 In this case, the amount of ozone used is preferably 100,000 mg or less, more preferably 95,000 mg or less, further preferably 90,000 mg or less, and particularly preferably 85,000 mg or less. All furniture has been removed during the furniture removal process and the room size is 60m 3 ~120m 3In this case, even if the amount of ozone used is equal to or less than the upper limit, the soot odor can be sufficiently reduced.

[0044] (ii) If the furniture remains in the room When furniture remains in the room, the amount of ozone used is 1 m 3 The amount is preferably 8,500 mg or more, more preferably 9,000 mg or more, and particularly preferably 10,000 mg or more. By spraying an amount of ozone above the lower limit, it is possible to more reliably deodorize a room where a fire has occurred.

[0045] The furniture remains in the room and the room size is 10 m 3 ~30m 3 In this case, the amount of ozone used is preferably 500,000 mg or less, more preferably 400,000 mg or less, further preferably 350,000 mg or less, and particularly preferably 320,000 mg or less. The furniture remains in the room and the room size is 10 m 3 ~30m 3 In this case, even if the amount of ozone used is equal to or less than the upper limit, the soot odor can be sufficiently reduced.

[0046] In addition, the furniture remains in the room and the room size is 30 m 3 ~60m 3 In this case, the amount of ozone used is preferably 900,000 mg or less, more preferably 800,000 mg or less, further preferably 700,000 mg or less, and particularly preferably 650,000 mg or less. The furniture remains in the room and the room size is 30m 3 ~60m 3 In this case, even if the amount of ozone used is equal to or less than the upper limit, the soot odor can be sufficiently reduced.

[0047] In addition, the furniture remains in the room and the room size is 60 m 3 ~120m 3In this case, the amount of ozone used is preferably 1,500,000 mg or less, more preferably 1,300,000 mg or less, and even more preferably 1,250,000 mg or less. The furniture remains in the room and the room size is 60 m 3 ~120m 3 In this case, even if the amount of ozone used is equal to or less than the upper limit, the soot odor can be sufficiently reduced.

[0048] Here, the ozone fumigation work may be in the form of spraying the above amount of ozone in one day, or in the form of spraying the above amount of ozone over multiple days.

[0049] When the above amount of ozone is sprayed over multiple days, the number of days for spraying is preferably 2 or more, more preferably 5 or more, and even more preferably 10 or more. By spraying ozone over the above number of days, the soot odor can be efficiently reduced.

[0050] For the ozone fumigation work, a known ozone fumigation device can be used. Among them, the ozone fumigation device that can be preferably used is Super Activo (manufactured by Kai Corporation).

[0051] (3) Coating work The coating process involves applying paint containing activated carbon to the interior walls where soot remains. By doing so, it is possible to more reliably deodorize the room where the fire occurred. In this specification, the term "interior wall" refers to a wall surface on the inside of a room, and includes any wall surface of a side wall, floor, ceiling, closet, cupboard, or shoebox.

[0052] The paint is preferably a water-based paint. However, the paint in the present invention may be either a water-based paint or an oil-based paint.

[0053] In addition, the paint preferably contains an adhesive. By using a paint containing an adhesive, the activated carbon inside the paint can be applied to the inner wall more efficiently, and the soot odor can be reduced.

[0054] The paint preferably contains methylcellulose. By using a paint containing methylcellulose, the soot odor can be more reliably reduced.

[0055] A preferred example of a paint having the above characteristics is Sumichan (registered trademark) (manufactured by Niigata Jidai no Ie Co., Ltd.).

[0056] There are also no particular limitations on the hue, saturation, and brightness of the paint. Here, in the deodorizing method of the present invention, it is preferable to apply a paint of the same color as the inner wall to be applied. EXAMPLES

[0057] The present invention will now be described in more detail with reference to examples.

[0058] (1) About the fire scene to be deodorized (1-1) Fire case A fire broke out on the second floor of a 900-square-meter two-story reinforced concrete building, burning 135 square meters of the building.

[0059] (1-2) Condition of the room at the start of deodorization Of the buildings listed above (1-1), the acoustic room, office, and conference room were targeted for deodorization. In addition, at the time work began, 10 months had passed since the fire mentioned above (1-1) occurred. The odor is so strong that if you stay in the room for 10 minutes without wearing work clothes (deodorizing clothing), you will be hit with a headache and nausea.

[0060] (1-3) Odor measurement before deodorization process In accordance with the method described in the "Air Environment Survey Manual for Dioxins (March 2008, Ministry of the Environment, Air Environment Bureau)," samples were collected using a hypolium sampler equipped with a sampling tube fitted with two pieces of polyurethane foam attached to the rear of the filter paper, and dioxins (a type of odorous component derived from soot) were measured. The sampling point was the center of the room. The amount of gas sampled was about 200 m 3 The sample was collected continuously for 7 hours at a flow rate of about 500 mL / min. Quartz fiber filter paper was used for the hyporium sampler. In addition, high-resolution gas chromatography mass spectrometry was used for the analysis.

[0061] (2) Deodorization process (2-1) Contamination prevention process, furniture removal process First, to prevent damage from dust, etc., we prepared a simple shower room near the exit of the room. We also removed the furniture from the room.

[0062] (2-2) Soot reduction work First, we installed a dust collector in the room. We used a grinder to scrape the inner walls to remove the baked-on soot. We also used steel wool to remove areas with only light soot adhesion.

[0063] (2-3) Ozone fumigation work (2-3-1) Enzyme treatment Before the ozone spray, a deodorizer containing enzymes (protease, lipase, amylase, cellulase) was sprayed.

[0064] (2-3-2) Ozone fumigation work Using an ozone fumigation device (manufactured by Kai Corporation), 3 Ozone was sprayed so that the amount of ozone used per unit was approximately 13,000 mg.

[0065] (2-4) Coating work After the ozone fumigation work, paint containing activated carbon (activated paint Sumichan (registered trademark), manufactured by Jidai-no-ie Niigata Co., Ltd.) was applied to the inner walls where soot remained to form a coating.

[0066] (3) Measurement of odor after implementing this deodorization method The odor was measured under the same conditions as in "(1-3) Measurement of odor before deodorization process" above. As shown in Table 1, it was found that this deodorization method was able to reduce odors.

[0067] [Table 1]

[0068] In addition, the odor components in each room were analyzed in detail after the odor removal method was implemented. The results are shown in Tables 2 to 4.

[0069] [Sound room] [Table 2]

[0070] [Office] [Table 3]

[0071] [Conference Room] [Table 4]

[0072] Notes for Tables 2 to 4 - Numbers in parentheses in the concentration column indicate concentrations above the detection limit and below the quantification limit. "ND" in the concentration column indicates that the concentration was below the detection limit. The toxic equivalence factor was determined using the WHO TEF (2006). - The toxicity equivalent is calculated by converting values ​​below the lower limit of detection to toxicity equivalent values, using the values ​​as they are for values ​​above the lower limit of detection and using half the value for values ​​below the lower limit of detection.

[0073] As shown in Tables 2 to 4, it was found that the present deodorizing method was able to reduce the concentrations of all of dioxins, dibenzofurans, and coplanar PCBs. [Industrial Applicability]

[0074] The present invention can be applied to deodorizing a room where a fire has occurred.

Claims

1. A method for deodorizing a room where a fire has occurred, comprising: The method has a soot odor removal step for removing soot odor, The soot odor removing step includes: Ozone fumigation work involves spraying ozone into the room, A coating process in which paint is applied to the inner walls where soot remains; A deodorizing method comprising the steps of:

2. The size of the room to be deodorized is 10m ３ The deodorizing method according to claim 1 .

3. The ozone fumigation process is carried out at a temperature of 1 m ３ 3. The deodorizing method according to claim 1, wherein ozone is used in an amount of 6,500 mg or more per unit time.

4. The deodorizing method according to any one of claims 1 to 3, wherein the soot odor removing step includes a coating operation of coating an inner wall on which soot remains with a paint containing activated carbon.

5. The deodorizing method according to any one of claims 1 to 4, wherein the ozone fumigation operation includes spraying a liquid deodorizing agent before spraying ozone.

6. The deodorizing method according to any one of claims 1 to 5, wherein the ozone fumigation work is carried out by spraying ozone over five or more days.

7. The size of the room to be deodorized is 60m ３ The above rooms are available. The ozone fumigation process is carried out at a temperature of 1 m ３ The deodorizing method according to any one of claims 1 to 6, wherein ozone is used in an amount of 6,500 mg or more per unit time.

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