Deodorization system and deodorization method

Abstract

To deodorize odorous gas with a combustion method while suppressing use of fossil fuel.SOLUTION: A deodorization system A comprises a facility 2 having a coating device 1 that applies coating liquid to a film to form a coating layer, a recovery device 3 that recovers odorous gas generated from the facility 2, and a deodorization furnace 5 that burns the recovered odorous gas together with a combustion material, where the combustion material contains an excess raw material of the coating liquid.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a system and method for burning odorous gases to deodorize them. [Background technology]

[0002] Conventionally, there is known an apparatus having a coating device that applies a coating liquid to a film to form a coating layer. For example, the coating device is used when applying a pressure-sensitive adhesive or adhesive liquid to a film in order to bond two films together. Generally, odorous gases are generated from the above-mentioned facilities. Representative examples of odorous gases include volatile organic compounds (VOCs). As one of the methods for deodorizing the odorous gases, a combustion method is known. For example, Patent Document 1 discloses that odorous gas heated by the heat of a heat storage body is supplied into a deodorizing furnace, and the odorous gas is deodorized by burning fuel in the deodorizing furnace. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-69164 A Summary of the Invention

[0004] Conventional deodorization systems using the combustion method burn fossil fuels such as LNG to decompose odorous gases by high-temperature oxidation, but the use of fossil fuels increases costs, especially in recent years when fuel costs are rising year by year. By reducing the use of fossil fuels used in the deodorization, it is possible to prevent product costs from increasing and also contribute to reducing CO2 emissions. [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a deodorization system and a deodorization method that can deodorize odorous gases by a combustion method while reducing the use of fossil fuels. [Means for solving the problem]

[0006] The deodorizing system according to the first embodiment includes an equipment having a coating device that applies a coating liquid to a film to form a coating layer, a recovery device that recovers odorous gas generated from the equipment, and a deodorizing furnace that combusts the recovered odorous gas together with a combustion material, the combustion material including excess raw material of the coating liquid. The deodorizing system according to the first embodiment includes an equipment having a coating device that applies a coating liquid to a film to form a coating layer, a recovery device that recovers odorous gas generated from the equipment, and a deodorizing furnace that combusts the recovered odorous gas together with a combustion material, the combustion material containing the coating liquid.

[0007] A deodorization system according to a third aspect is the deodorization system according to the first or second aspect, wherein the combustion material has a viscosity of 1 mPa·s or more and 50 mPa·s or less. A deodorization system according to a fourth aspect is the deodorization system according to any one of the first to third aspects, wherein the combustion material is atomized and supplied into the deodorization furnace. A deodorization system according to a fifth aspect is the deodorization system according to any one of the first to fourth aspects, wherein the combustion material contains a mixture of two or more kinds of the surplus raw materials. A deodorizing system according to a sixth aspect is the deodorizing system according to any one of the first to fifth aspects, wherein one of the surplus raw materials is an adhesive and the other of the surplus raw materials is an organic solvent. A deodorization system according to a seventh aspect is the deodorization system according to any one of the first to sixth aspects, in which the odorous gas is combusted together with the combustion material and fossil fuel in the deodorization furnace.

[0008] According to another aspect, a method for deodorization is provided. A preferred embodiment of a deodorization method includes the steps of: recovering an odorous gas generated from an equipment having a coating device that applies a coating liquid to a film to form a coating layer; and introducing the recovered odorous gas into a deodorization furnace and combusting the odorous gas with a combustible material in the deodorization furnace, thereby deodorizing the odorous gas, wherein the combustible material contains the coating liquid or excess raw material of the coating liquid. Effect of the Invention

[0009] The deodorization system and method of the present invention use a combustion material containing surplus raw material of the coating liquid to burn the odorous gas, so that the use of fossil fuels can be reduced. By reducing the amount of fossil fuels used, the cost of deodorizing the odorous gas can be reduced, and further, it can contribute to reducing CO2 emissions. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic reference diagram of a deodorization system according to a first embodiment. [Diagram 2] FIG. 2 is a side view showing an example of a facility having a coating device. [Diagram 3] FIG. 4 is a side view showing another example of the facility having a coating device. [Figure 4] FIG. 1 is a reference diagram showing an example of a preparation device. [Diagram 5] FIG. 11 is a reference diagram showing another example of a preparation apparatus. [Figure 6] FIG. 11 is a reference diagram showing another example of a preparation apparatus. [Figure 7] 1 is a side view, partially in cross section, showing an example of a deodorization apparatus having a deodorization furnace. [Figure 8] FIG. 11 is a schematic reference diagram showing a first example of a deodorization system according to a second embodiment. [Figure 9] FIG. 11 is a schematic reference diagram showing a first example of a deodorization system according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [First embodiment] <Outline of the deodorizing system> FIG. 1 is a schematic diagram showing the overall configuration of a deodorization system A of the first embodiment. The deodorizing system A comprises a facility 2 having a coating device 1 that applies a coating liquid to a film to form a coating layer, a recovery device 3 that recovers odorous gas generated from the facility 2, a preparation device 4 that prepares a combustion material containing surplus raw material of the coating liquid, and a deodorizing device 6 having a deodorizing furnace 5 that burns the recovered odorous gas together with the combustion material. The recovery device 3 is attached to the facility 2. The thin arrows in FIG. 1 indicate the direction in which the combustion material and fossil fuel are fed, and the hollow arrows indicate the flow of odorous gases and exhaust gas.

[0012] The facility 2 with the recovery device 3 is usually provided in a building B. In the illustrated example, one facility 2 is provided in one building B, but multiple facilities 2 may be provided in one building (not illustrated). The facility 2 has a coating device 1 and any other appropriate device. The coating device 1 is not particularly limited as long as it can form a coating layer by coating a coating liquid on a film. For example, the coating device 1 may be a device that coats a tacky liquid (or adhesive liquid) on the surface of a film to form a tacky layer (or adhesive layer) on the film; a device that coats a functional solution on the surface of a film to form a functional layer on the film; or a device that prints ink on a film to form a printed layer; etc. For example, when the coating device 1 is a device that forms a tacky layer (or adhesive layer), the tacky liquid (or adhesive liquid) corresponds to the coating liquid, and the tacky layer (or adhesive layer) corresponds to the coating layer. For example, when the coating device 1 is a device that forms a functional layer, the functional solution corresponds to the coating liquid, and the functional layer corresponds to the coating layer. For example, when the coating device 1 is a printing device, the ink corresponds to the coating liquid, and the printed layer corresponds to the coating layer.

[0013] The film is not particularly limited, and examples thereof include optical films and films other than optical films. Examples of optical films include polarizing films, retardation films, anti-reflection films, light diffusion films, brightness enhancement films, light reflection films, and surface protection films. Examples of films other than optical films include release liners and isotropic films. In terms of material, the film is generally a resin film, but may be other than a resin film. Examples of films other than resin films include paper, synthetic paper, nonwoven fabric, and woven fabric.

[0014] The recovery device 3 mainly recovers odorous gas generated from the coating device 1. The recovered odorous gas is sent to an accumulation section 32. When the accumulation section 32 is filled with odorous gas and reaches a certain concentration, the odorous gas is sent from the accumulation section 32 to the deodorizing furnace 5. The odorous gas is not limited to being generated from the coating device 1. When odorous gas is generated from a device other than the coating device 1 among the devices provided in the facility 2, the odorous gas may be recovered and sent to the deodorizing furnace 5 through the accumulation section 32. The recovered odorous gas may be sent directly to the deodorizing furnace 5 without using the accumulation section 32.

[0015] The surplus raw material of the coating liquid refers to a raw material that is left over from among the raw materials that constitute the coating liquid. In one embodiment, the surplus raw material is utilized for deodorizing an odorous gas by a combustion method. That is, the coating liquid to be applied to the film is prepared by mixing various raw materials according to the type of coating layer to be formed. Therefore, the coating liquid is composed of a mixture of two or more raw materials. The coating liquid contains, for example, an active ingredient and an organic solvent that dissolves the active ingredient, and contains any additives as necessary. The active ingredient is, for example, a compound containing carbon in its molecule, and the organic solvent is also a compound containing carbon in its molecule. Usually, a coating liquid is prepared by preparing a predetermined amount of such two or more raw materials in advance and mixing them in a predetermined ratio. However, due to various circumstances, the raw materials prepared in advance may be left over without being prepared as a coating liquid. In one embodiment of the present invention, the leftover raw materials (surplus raw materials) are effectively used as a combustion material in a deodorizing furnace 5 to deodorize odorous gases. In addition, the coating liquid itself may be left over due to various circumstances. In another embodiment of the present invention, this leftover coating liquid is effectively utilized as a combustion material in a deodorizing furnace 5 in order to deodorize odorous gases. Hereinafter, the leftover coating liquid is referred to as "excess coating liquid." The specific details will be explained below.

[0016] <Facilities with coating equipment> Several examples of the equipment 2 having the coating device 1 are shown, but the coating device 1 and the equipment 2 are not limited to these. Fig. 2 shows an installation 2 having one exemplary coating device 1. The thin arrows in Fig. 2 indicate the transport direction of the film, and the hollow arrows indicate the flow of the odorous gas (similar to Fig. 3). Referring to FIG. 2, the equipment 2 includes a conveying device 23 that conveys a film 28 from an unwinding section 21 to a winding section 22, a coating device 1 that applies an adhesive liquid 71, which is a coating liquid, to the film 28, a drying device 24 that dries an adhesive layer 72, which is a coating layer formed on the film 28, and collects odorous gases, and a laminating device 25 that bonds another film 29 to the adhesive layer 72. The unwinding section 21 is disposed on the upstream side of the transport direction of the film 28, and the winding section 22 is disposed on the downstream side of the transport direction of the film 28. The coating device 1 continuously coats the surface of the film 28, which is continuously transported from the upstream side of the transport direction to the downstream side of the transport direction, with an adhesive liquid 71. By coating the adhesive liquid 71 and drying it, an adhesive layer 72 is formed on the surface of the film 28. The coating device 1 is not particularly limited, and a conventionally known device can be used. For example, the coating device 1 may be a die coater, a gravure coater, a reverse coater, a bar coater, or the like. In the illustrated example, a die coater is illustrated. The adhesive liquid 71 (coating liquid) contains an adhesive as an active ingredient, an organic solvent, and may contain any other suitable additives. The adhesive liquid 71 adjusted to a predetermined viscosity is obtained by mixing raw materials (adhesive liquid raw materials) such as the adhesive and the organic solvent in a predetermined ratio. The viscosity of the adhesive liquid 71 is adjusted to a viscosity suitable for coating, for example, 100 mPa·s to 1000 mPa·s at 23° C. The viscosity of the adhesive liquid refers to a value measured using a commercially available E-type viscometer at 23° C. The coating device 1 is filled with the adhesive liquid 71 adjusted as described above.

[0017] The drying device 24 is provided downstream of the coating device 1. The adhesive layer 72 immediately after coating by the coating device 1 has high fluidity, so it is necessary to volatilize the organic solvent. The drying device 24 volatilizes the organic solvent from the adhesive layer 72 immediately after coating, and collects the volatilized organic solvent (odor gas). Therefore, in this embodiment, the drying device 24 corresponds to the collection device 3 that collects the odor gas. The drying device 24 has a chamber 241 through which the film 28 can pass, a drying means (not shown) provided in the chamber 241, and a collection means 31 provided in the chamber. The chamber 241 has an inlet through which the transported film 28 enters, and an outlet through which the film 28 exits. The drying means are roughly classified into active drying means and passive drying means. Examples of active drying means include a method in which a heating means such as an oven is disposed at a distance from the adhesive layer and heat is applied to the adhesive layer by the heating means; a method in which warm air or air at ambient temperature is blown onto the adhesive layer; and the like. Examples of passive drying means include natural drying. These drying means can be used alone or in combination of two or more. A representative example of the recovery means 31 is an aspirator. The organic solvent is volatilized from the adhesive layer by the drying means and exists in the chamber, and the volatilized organic solvent (odor gas) is suction-recovered by the recovery means 31 and sent to the accumulation section 32 through a pipe, and then sent to the deodorizing furnace 5. The laminating device 25 laminates another film 29 to the dried adhesive layer 72. In this manner, a laminate consisting of the film 28 / adhesive layer 72 / another film 29 is obtained. The obtained laminate is taken up by the winding section 22.

[0018] FIG. 3 shows another exemplary installation 2 with a coating device 1 . Referring to Figure 3, the equipment 2 includes a conveying device 23 that conveys the film 28 from the unwinding section 21 to the winding section 22, a coating device 1 that applies a functional solution 73, which is a coating liquid, to the film 28, a drying device 24 that dries a functional layer 74, which is a coating layer formed on the film 28, and collects odorous gases, and a curing device 26 that hardens the functional layer. The coating device 1 of FIG. 3 forms a functional layer 74 on the film 28. The functional layer 74 is not particularly limited, and may be a hard coat layer, an anti-glare layer, an anti-reflection layer, or the like. The functional solution 73 for forming the functional layer 74 is appropriately selected according to the type of the functional layer 74. The functional solution 73 (coating liquid) contains an active ingredient for expressing its function and an organic solvent, and may contain any other appropriate additives. The functional solution 73 prepared to a predetermined viscosity is obtained by mixing raw materials (functional solution raw materials) such as the active ingredient and the organic solvent in a predetermined ratio. The functional solution 73 is also prepared to a viscosity suitable for coating, similar to the adhesive liquid 71. The coating device 1 is filled with the prepared functional solution 73.

[0019] The functional layer 74 immediately after being coated by the coating device 1 has high fluidity, so it is necessary to volatilize the organic solvent. Similarly, the drying device 24 in FIG. 3 volatilizes the organic solvent from the functional layer 74 immediately after coating, and collects the volatilized organic solvent (odor gas). The drying device 24 in FIG. 3 has a similar configuration to the drying device 24 in FIG. 2, and collects the volatilized organic solvent (odor gas) by suction using a collection means 31. The curing device 26 is a device that cures the functional layer 74 after drying. The curing device 26 can be appropriately set according to the type of active ingredient of the functional solution. For example, when the active ingredient of the functional solution includes a photocurable resin such as an ultraviolet curable resin, a light irradiator such as an ultraviolet ray is used as the curing device 26. Note that when the functional layer 74 is sufficiently cured by drying, the curing device is omitted.

[0020] The facility 2 is provided with one coating device 1, but may be provided with two or more coating devices (not shown). The facility 2 is provided with one recovery device 3 (drying device 24 in the illustrated example) for recovering odorous gas, but may be provided with two or more recovery devices (not shown). Furthermore, the facility 2 may be provided with other optional devices as necessary. Examples of other optional devices include (a) a device for laminating an optional film onto a film, (b) a device for peeling an optional film from a laminated film, (c) a device for forming an optional layer on a film, (d) a device for stretching a film, and (e) a device for cutting a film.

[0021] <Preparation equipment> The preparation device 4 is a device for producing a combustion material containing at least one of an excess raw material of a coating liquid and an excess coating liquid. As described above, at least one of the excess raw material and the excess coating liquid is used as the combustion material, but the excess raw material and / or the excess coating liquid is often too viscous to be sent as is. In addition, the excess raw material and / or the excess coating liquid may not be combusted sufficiently in the deodorizing furnace 5 as is. For this reason, the excess raw material and / or the excess coating liquid are prepared to an appropriate viscosity in the preparation device 4 to prepare the combustion material. Note that if the excess raw material and / or the excess coating liquid themselves have an appropriate viscosity (even if the excess raw material and / or the excess coating liquid is not prepared), the preparation device and the preparation process of the combustion material may be omitted. In this case, the excess raw material itself and / or the excess coating liquid itself are used as the combustion material.

[0022] Fig. 4 illustrates a preparation device 4 that mixes two types of surplus raw materials to prepare a combustible material. The thin arrows in Fig. 4 indicate the feeding direction of the surplus raw materials and the combustible material. The preparation device 4 has a first tank 41 for storing one surplus raw material, a second tank 42 for storing another surplus raw material, a mixer 43 for preparing a combustible material by mixing two or more kinds of surplus raw materials, and a reserve tank 44 for storing the combustible material. Hereinafter, one surplus raw material may be referred to as the "first surplus raw material" and the other surplus raw material may be referred to as the "second surplus raw material." Although not shown in the figure, when preparing a combustible material by mixing three or more kinds of surplus raw materials, three or more tanks are provided accordingly. In the first tank 41 and the second tank 42, agitators 411, 421, viscometers 412, 422, thermometers 413, 423, etc. are provided as necessary. In the mixer 43, agitator 431 and viscometer 432 are provided, and also a thermometer 433, etc. are provided as necessary. In the reserve tank 44, a viscometer 442, a thermometer 443, a stirrer (not shown), etc. are provided as necessary.

[0023] A first surplus raw material 81 is supplied into the first tank 41 through a pipe or the like. A second surplus raw material 82 is supplied into the second tank 42 through a pipe or the like. The first surplus raw material 81 is, for example, an adhesive, and the second surplus raw material 82 is, for example, an organic solvent. The mixer 43 is connected to a pipe connected to the first tank 41 and a pipe connected to the second tank 42, respectively, and the first excess raw material 81 and the second excess raw material 82 are supplied into the mixer 43 through the pipe. The first excess raw material 81 and the second excess raw material 82 are mixed by the mixer 43 to obtain a combustion material 83 of a predetermined concentration. The reserve tank 44 is connected to a pipe connected to the mixer 43, and the combustion material 83 prepared by the mixer 43 is supplied into the reserve tank 44 through the pipe. The combustion material 83 in the reserve tank 44 is sent to the deodorizing furnace 5 through the pipe. A pump or the like is usually used as a power source for transporting the excess raw material and the combustion material, but the power source is not shown. A buffer tank 45 for temporarily storing the combustion material may be provided between the reserve tank 44 and the deodorizing furnace 5.

[0024] Fig. 5 illustrates a preparation device 4 that prepares a combustible material from an excess coating liquid. The thin arrows in Fig. 5 indicate the feeding direction of the excess coating liquid and the combustible material. The preparation device 4 has a first tank 46 for storing excess coating liquid 85, a second tank 47 for storing viscosity adjusting liquid 86, a mixer 48 for mixing the excess coating liquid 85 and the viscosity adjusting liquid 86 to prepare the combustible material 83, and a reserve tank 44 for storing the combustible material 83. In the first tank 46 and the second tank 47, stirrers 461, 471, viscometers 462, 472, thermometers 463, 473, etc. are provided as necessary. In the mixer 48, a stirrer 481 and a viscometer 482 are provided, and, if necessary, a thermometer 483, etc. are also provided. In the reserve tank 44, similarly to the preparation apparatus 4 in FIG. 4, a viscometer 442, a thermometer 443, a stirrer (not shown), etc. are provided as necessary.

[0025] Excess coating liquid 85 is supplied into the first tank 46 through piping or the like. Viscosity adjusting liquid 86 is supplied into the second tank 47 through piping or the like. The excess coating liquid 85 is a coating liquid that is left over from among the coating liquids used in the coating device 1 due to various circumstances, and is, for example, the above-mentioned adhesive liquid, functional solution, ink, etc. Representatively, an organic solvent can be used as the viscosity adjusting liquid 86. For example, excess raw material (organic solvent) may be used as the viscosity adjusting liquid 86 added to the excess coating liquid 85 when producing the combustible material. The mixer 48 is connected to pipes leading to the first tank 46 and the second tank 47, respectively, and the excess coating liquid 85 and the viscosity adjusting liquid 86 are supplied into the mixer 48 through the pipes. The excess coating liquid 85 and the viscosity adjusting liquid 86 are mixed by the mixer 48 to obtain a combustion material 83 of a predetermined concentration. The obtained combustion material 83 is supplied into the reserve tank 44, as in the preparation device 4 of FIG. 4, and then sent to the deodorizing furnace 5. A pump or the like is usually used as a power source for transporting the excess coating liquid and the combustion material, but the power source is not shown. A buffer tank 45 for temporarily storing the combustion material may be provided between the reserve tank 44 and the deodorizing furnace 5.

[0026] Fig. 6 illustrates a preparation device 4 that prepares a combustible material from surplus raw material and surplus coating liquid. Thin arrows in Fig. 6 indicate the feeding directions of the surplus raw material, surplus coating liquid, and combustible material. The preparation device 4 has a first tank 41a for storing one surplus raw material, a second tank 42a for storing another surplus raw material, a third tank 46a for storing surplus coating liquid, a mixer 49a for mixing the surplus raw material and the surplus coating liquid to prepare a combustible material, and a reserve tank 44 for storing the combustible material. Although not shown in the figure, the preparation device 4 may further have another tank for mixing three or more kinds of surplus raw materials, and may also have a tank for storing a viscosity adjusting liquid. In the first tank 41a, the second tank 42a, and the third tank 46a, stirrers 411a, 421a, 461a, viscometers 412a, 422a, 462a, thermometers 413a, 423a, 463a, and the like are provided as necessary. In the mixer 49a, a stirrer 491a and a viscometer 492a are provided, and a thermometer 493a, and the like are also provided as necessary. In the reserve tank 44, a viscometer 442, a thermometer 443, a stirrer (not shown), and the like are provided as necessary, similar to the preparation device 4 in FIG.

[0027] A first surplus raw material 81 is supplied into the first tank 41a through a pipe or the like. A second surplus raw material 82 is supplied into the second tank 42a through a pipe or the like. A surplus coating liquid 85 is supplied into the third tank 46a through a pipe or the like. The first surplus raw material 81 is, for example, an adhesive, the second surplus raw material 82 is, for example, an organic solvent, and the surplus coating liquid 85 is, for example, an adhesive liquid. In the preparation device 4 of this example, an organic solvent is used as the second surplus raw material 82, so the viscosity adjusting liquid described in the preparation device 4 shown in FIG. 5 is omitted. The mixer 49a is connected to pipes leading to each tank, and the first excess raw material 81, the second excess raw material 82, and the excess coating liquid 85 are each supplied into the mixer 49a through the pipes. The first excess raw material 81, the second excess raw material 82, and the excess coating liquid 85 are mixed by the mixer 49a to obtain a combustion material 83 of a predetermined concentration. The obtained combustion material 83 is supplied into the reserve tank 44, as in the preparation device 4 of FIG. 4, and then sent to the deodorizing furnace 5. A pump or the like is usually used as a power source for transporting the excess coating liquid and the combustion material, but the power source is not shown. A buffer tank 45 for temporarily storing the combustion material may be provided between the reserve tank 44 and the deodorizing furnace 5.

[0028] <Deodorizing equipment> The deodorizing device 6 is a device that substantially deodorizes odorous gases. The deodorizing device 6 has a deodorizing furnace 5 which burns and oxidizes and decomposes odorous gases, and may be provided with other devices as necessary. Fig. 7 shows an example of a deodorization device 6. The thin arrows in Fig. 7 indicate the direction in which the air-fuel mixture is sent, and the hollow arrows indicate the flows of odorous gas and exhaust gas. For example, the deodorizing device 6 has a deodorizing furnace 5 equipped with a heat storage device 61, a waste heat boiler 62, and an exhaust section 63. The deodorizing furnace 5 has a case 52 that defines a combustion chamber 51, a heat storage device 61 attached to the case 52, a combustion material supply section 53 that supplies a combustion material into the combustion chamber 51, a fuel supply section 54 that supplies a fossil fuel into the combustion chamber 51, an odor gas introduction section 55 that introduces an odor gas, and an exhaust gas discharge section 56 that discharges exhaust gas generated after burning the odor gas. The heat storage device 61 is provided as necessary.

[0029] The housing 52 is made of a highly heat-resistant container such as metal. The combustible material supplying section 53 has a delivery section 531 (such as a pump) that pressurizes the combustible material containing the excess raw material and / or excess coating liquid produced by the preparation device 4 and sends it to the combustion chamber 51, an air intake section 532 (such as a compressor) that takes in air, pressurizes it, and sends it, a discharge section 533 (such as a spray nozzle) that is attached to the housing 52 and discharges the mixture of the combustible material and air into the combustion chamber 51, and piping that connects the delivery section 531 to the discharge section 533 and the air intake section 532 to the discharge section 533. The piping is joined midway between the delivery section 531 and the air intake section 532, and the air and the combustible material are mixed midway through the piping. Therefore, the mixture of the combustible material and the air is discharged from the discharge section 533 in the form of a mist. Hereinafter, the mixture containing the combustible material and the air is referred to as the "combustible material mixture." The combustible gas can be oxidized and decomposed by burning the combustible mixture discharged from the discharge portion 533 in the combustion chamber 51. Furthermore, a blower outlet 534 is provided around the discharge portion 533. The blower (such as a sirocco fan) is provided to blow the mist of the combustible mixture discharged from the discharge portion 533. The fuel supply unit 54 has a delivery unit 541 (such as a pump) that pressurizes the fossil fuel stored in the fuel tank and sends it to the combustion chamber 51, an air intake unit 542 (such as a compressor) that takes in air, pressurizes it, and sends it out, a delivery unit 543 (such as a spray nozzle) that is attached to the housing 52 and discharges a mixture of the fuel and air into the combustion chamber 51, and piping that connects the delivery unit 541 to the delivery unit 543 and the air intake unit 542 to the delivery unit 543, respectively. The fuel supply unit 54 can have a similar configuration to the combustion material supply unit 53.

[0030] The heat storage device 61 is provided for heating the odorous gas. The heat storage device 61 is not particularly limited, and a conventionally known one can be used. The illustrated example is a rotary heat storage device. In such a rotary heat storage device 61, the heat storage chamber is divided into a plurality of chambers, and each chamber is filled with a heat storage body. The odorous gas introduced from the odorous gas introduction section 55 into the gas chamber 57 passes through a heat storage chamber 611 (hereinafter referred to as a first heat storage chamber) and is supplied to the combustion chamber 51. The odorous gas that has passed through the first heat storage chamber 611 receives heat from the heat storage body and is supplied to the combustion chamber 51 in a high-temperature state. On the other hand, the exhaust gas obtained by burning the odorous gas in the combustion chamber 51 passes through another heat storage chamber 612 (hereinafter referred to as a second heat storage chamber) and is discharged from the exhaust gas discharge section 56. The exhaust gas that has passed through the second heat storage chamber 612 dissipates heat to the heat storage body and is discharged at a relatively low temperature. Such a rotary heat storage device is well known and is disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-300399, and therefore will not be described further here. Note that the heat storage device 61 is not limited to the rotary type, and may be, for example, a type in which gas supply and exhaust are switched as disclosed in WO2013 / 077079, etc.

[0031] The waste heat boiler 62 is a device for effectively utilizing energy, and is a conventionally known device for recovering heat from exhaust gas and generating steam from the heat. The exhaust gas that has passed through the waste heat boiler 62 is discharged from an exhaust section 63.

[0032] <Deodorizing system operation and deodorizing method> (Odor gas recovery process) 1 to 3, a facility 2 having a coating device 1 is operated. As described above, the coating device 1 in Fig. 2 is filled with an adhesive liquid 71 of a predetermined viscosity containing an adhesive as an active ingredient and an organic solvent, and the coating device 1 in Fig. 3 is filled with a functional solution 73 containing an active ingredient for function expression and an organic solvent. Here, the operation of the equipment 2 having the coating device 1 in Fig. 2 will be described, but the equipment 2 in Fig. 3 also collects odorous gas from the coating device 1 through the collection device 3.

[0033] The film 28 is unwound from the unwinding section 21 and transported downstream, and the surface of the film 28 is coated with an adhesive liquid by the coating device 1. After the adhesive liquid is applied, the film 28 is transported to the drying device 24, and the organic solvent is evaporated from the adhesive layer 72 (the adhesive liquid extending in a layer on the film surface), which is a coating layer. The evaporated organic solvent, which is an odorous gas, is collected by the recovery device 3 and sent to the accumulation section 32. By the drying, an adhesive layer 72 with high adhesiveness is formed on the surface of the film 28. Next, another film 29 is laminated to the surface of the adhesive layer (the surface opposite to the film 28) by the lamination device 25. The obtained laminate is wound up by the winding section 22. By continuing to operate the equipment 2, the accumulation section 32 is filled with the organic solvent, which is an odorous gas. The organic solvent is a typical volatile organic compound (VOC), and it is necessary to deodorize it.

[0034] (Combustion material preparation process) The combustion material is prepared at a time different from or in parallel with the recovery of the odorous gases. 1 and 4, a first surplus raw material 81 is supplied to a first tank 41 of the preparation device 4, and a second surplus raw material 82 is supplied to a second tank 42 of the preparation device 4. For example, an adhesive is supplied to the first tank 41, and an organic solvent is supplied to the second tank 42. The adhesive and the organic solvent are surplus raw materials of the adhesive liquid. For example, an adhesive remaining when preparing an adhesive liquid 71 used in the coating device 1 of the facility 2 is supplied to the first tank 41, and an organic solvent remaining when preparing the adhesive liquid 71 is supplied to the second tank 42 (see the dashed line in FIG. 1). The first surplus raw material 81 and the second surplus raw material 82 supplied to the first tank 41 and the second tank 42 are gently stirred by stirrers 411, 421, respectively, while their viscosity, temperature, etc. are measured. When the first surplus raw material 81 is an adhesive, its viscosity is, for example, 100 mPa·s or more and 1000 mPa·s or less at 23° C., and when the second surplus raw material 82 is an organic solvent, its viscosity is approximately 1 mPa·s. Here, the viscosity of the surplus raw materials such as the first surplus raw material and the combustion material refers to a value measured at 23°C using a commercially available E-type viscometer.

[0035] Next, a predetermined amount of adhesive (first surplus raw material 81) is supplied from the first tank 41 to the mixer 43, and a predetermined amount of organic solvent (second surplus raw material 82) is supplied from the second tank 42 to the mixer 43. The adhesive and organic solvent supplied to the mixer 43 are stirred and mixed by the stirrer 431, and the viscosity, temperature, etc. are measured. The mixture with the predetermined viscosity is used as the combustion material 83. Combustible material 83 is liquid and has a viscosity of, for example, 1 mPa·s to 50 mPa·s, and preferably 1 mPa·s to 40 mPa·s, at 23° C. Combustible material 83 with such a viscosity range is easily mixed with air in combustible material supply section 53, and can be discharged from discharge section 533 in a good mist state.

[0036] In order to obtain the combustion material 83 having a viscosity in the above range, a predetermined amount of adhesive (first excess raw material 81) and organic solvent (second excess raw material 82) are supplied to the mixer 43. In detail, the viscosity of the combustion material 83 to be prepared is set in the control unit (not shown) of the preparation device 4. The viscosity of the adhesive (first excess raw material 81) supplied to the first tank 41 and the viscosity of the organic solvent (second excess raw material 82) supplied to the second tank 42 are already known when the coating liquid is prepared. Therefore, in order to obtain a combustion material with a viscosity set in the control unit, the blending ratio of these raw materials can be obtained. The amount of raw materials to be mixed is set in advance in the control unit of the preparation device 4, or is calculated and stored by the control unit. It should be noted that by measuring the viscosity of the first excess raw material 81 in the first tank 41 and the viscosity of the second excess raw material 82 in the second tank 42, it can be confirmed whether the viscosity of the adhesive (first excess raw material 81) and the organic solvent (second excess raw material 82) is a known viscosity. Then, the control unit of the preparation device 4 supplies a predetermined amount of adhesive (first excess raw material 81) and a predetermined amount of organic solvent (second excess raw material 82) to the mixer 43, measures the viscosity in the mixer 43, and checks whether a mixture (combustible material 83) with the set viscosity has been produced. If the viscosity has not reached the set viscosity, more adhesive or organic solvent is supplied to the mixer 43 to adjust the viscosity, thereby obtaining a combustible material with a viscosity within the above range. It is also possible to use raw materials whose viscosity is unknown. In this case, the viscosities of the first excess raw material 81 and the second excess raw material 82 are measured by supplying them to the first tank 41 and the second tank 42, and the viscosities are stored in the control unit of the preparation device 4, and the amounts of the first excess raw material 81 and the second excess raw material 82 to be supplied to the mixer 43 are determined by calculations by the control unit. The preparation device 4 is controlled based on a programmed electronic computer. The same applies to other devices such as the coating device 1.

[0037] Combustible material 83 having the above viscosity is supplied to and stored in reserve tank 44. If necessary, the viscosity of combustible material 83 may also be measured in reserve tank 44. By measuring the viscosity in reserve tank 44, it is possible to recheck whether the viscosity of combustible material 83 is within the allowable range. Combustible material 83 in reserve tank 44 is sent to buffer tank 45 when deodorizing furnace 5 is in operation, and is then sent to deodorizing furnace 5.

[0038] The preparation of the combustible material is not limited to the case where an apparatus 4 for preparing a combustible material containing excess raw material as shown in FIG. 4 is used, but an apparatus for preparing a combustible material containing excess coating liquid as shown in FIG. 5 may be used, or an apparatus for preparing a combustible material containing excess raw material and excess coating liquid as shown in FIG. 6 may be used. The viscosity of the combustible material containing excess coating liquid is also adjusted to, for example, 1 mPa·s or more and 50 mPa·s or less, preferably 1 mPa·s or more and 40 mPa·s or less, at 23° C. The viscosity of the combustible material containing excess raw material and excess coating liquid is also adjusted to, for example, 1 mPa·s or more and 50 mPa·s or less, preferably 1 mPa·s or more and 40 mPa·s or less, at 23° C.

[0039] (Odorless gas deodorization process) When the odorous gas accumulates in the accumulation section 32, the odorous gas is sent to the deodorizing furnace 5 at an appropriate time for deodorization. 1 and 7, the odor gas is sent from the gas chamber 57 of the heat storage device 61 through the odor gas introduction section 55 to the first heat storage chamber 611, and is heated while passing through the first heat storage chamber 611. The odor gas at a high temperature enters the combustion chamber 51 from the first heat storage chamber 611 and is burned. The burned odor gas is decomposed to become exhaust gas (odorless gas such as water or carbon dioxide), and the exhaust gas enters the second heat storage chamber 612 from the combustion chamber 51. In the second heat storage chamber 612, the heat of the exhaust gas is transferred to the heat storage body, and the exhaust gas at a relatively low temperature passes through the waste heat boiler 62 and is discharged from the exhaust section 63. If the combustion is continued, the temperature of the heat storage body in the first heat storage chamber 611 decreases and the temperature of the second heat storage chamber 612 increases, so an exchange operation of introducing odor gas into the second heat storage chamber 612 and introducing exhaust gas into the first heat storage chamber 611 is performed at an appropriate time, and this is repeated.

[0040] On the other hand, in order to combust the odorous gas in the combustion chamber 51, a combustible material is supplied to the combustion chamber 51 through the combustible material supply section 53. The combustible material supply section 53 mixes the combustible material with air and discharges (sprays) the combustible material mixture from the discharge section 533. The combustible material in the combustible material mixture is discharged into the combustion chamber 51 in a mist form. The mist form refers to the combustible material being in the form of countless fine particles. When the combustible material mixture containing the mist of combustible material is discharged, it ignites in the combustion chamber 51. At the same time as the combustible material mixture is discharged, air is blown from the vicinity of the discharge section 533 toward the center of the combustion chamber 51 through the blower. The wind speed of the blower is not particularly limited, but from the viewpoint of rectifying the flame of the combustible material mixture, it is set to, for example, 5 m 3 / min or more 20m 3 / min or less, preferably 10 m 3 / min or more 15m 3 The wind speed is equal to or less than 1 / min. The mixture ratio of the combustible material to the air is, for example, 3 parts by mass to 11 parts by mass, and preferably 6 parts by mass to 8 parts by mass, for 1 part by mass of the combustible material. By mixing the combustible material and the air at a mixture ratio in this range, the combustible material can be burned without being wasted. Moreover, the discharge pressure of the combustible mixture is not particularly limited. In order to allow the combustible mixture to be smoothly discharged into the combustion chamber 51 without clogging the discharge portion 533, the discharge pressure of the combustible mixture is, for example, 0.3 MPa or more and 1 MPa or less, and preferably 0.4 MPa or more and 0.8 MPa or less. As described above, the combustible material has a viscosity of 1 mPa·s or more and 50 mPa·s or less, so that the combustible mixture can be discharged at a discharge pressure in the above range. Furthermore, the combustible material in the above viscosity range is easy to mix with air, and the combustible material can be atomized through the discharge portion 533 (such as a spray nozzle) and discharged into the combustion chamber 51. By using a combustible material having a viscosity within the above range, the combustible material mixture can easily fly far within the combustion chamber 51, and the odorous gas can be satisfactorily burned within the combustion chamber 51. In particular, by blowing wind E toward the combustion chamber 51 from the outlets 534 arranged around the discharge portion 533, the flame F of the combustible material mixture is arranged, and the flame F can fly farther, thereby oxidizing and decomposing the odorous gas thoroughly within the combustion chamber 51. In addition, the wind E makes it difficult for the combustible material mixture to burn near the discharge portion 533, and therefore early deterioration of the housing 52 and the discharge portion 533 can be prevented.

[0041] When a relatively large amount of combustion material containing excess raw material and / or excess coating liquid can be produced, the odorous gas can be burned by the combustion material alone. Although it depends on the amount of odorous gas to be treated, when the odorous gas is not sufficiently deodorized by only burning the combustion material mixture, fossil fuel is used in combination. The combustion material is prepared from excess raw material and / or excess coating liquid of the coating liquid, and there are cases where there is not enough excess raw material and / or excess coating liquid to deodorize a predetermined amount of odorous gas. In such cases, fossil fuel is supplied to the combustion chamber 51 from the fossil fuel tank 58 through the fuel supply unit 54 and burned together with the combustion material. Examples of fossil fuel include natural gas, petroleum, and coal, but natural gas such as LNG is usually used. Even when fossil fuel is used, it is preferable to deodorize the odorous gas by using the combustion material and fossil fuel in combination in order to reduce the amount of fossil fuel used. Combustion of odorous gas using fossil fuel has been publicly known in the past, and when fossil fuel is used, it can be carried out in a similar manner to the past.

[0042] The deodorization system and method of the present invention can deodorize odorous gases by burning excess raw material of a coating liquid and / or excess coating liquid. By using excess raw material and / or excess coating liquid as combustion materials, the amount of fossil fuels used can be reduced compared to conventional methods that used fossil fuels to deodorize odorous gases. Therefore, the cost required to deodorize odorous gases can be reduced compared to conventional methods, and further, it can contribute to reducing CO2 emissions.

[0043] [Second embodiment] In a typical factory, there are often multiple buildings on the premises each equipped with facilities having coating devices. In the above first embodiment, a case where one deodorizing furnace 5 is provided corresponding to one building B has been illustrated, but the present invention is not limited to this. For example, as shown in FIG. 8, when there are multiple buildings (two in the illustrated example for convenience) with equipment 2 on the same premises, the odorous gases recovered from the equipment 2 of the multiple buildings B-1, B-2, for example, may be collected and deodorized in a deodorizing furnace 5. In addition, in the above first embodiment, the surplus raw material in the coating device 1 of the facility 2 in building B is used as the surplus raw material for preparing the combustion material for burning the odorous gas recovered from the facility 2 in building B in the deodorization furnace 5, but this is not limited to this. For example, as shown in FIG. 9, when there are multiple buildings (two in the illustrated example for convenience) with equipment 2 on the same premises, for example, surplus raw material in the coating device 1 of equipment 2 in one building B-4 may be used as surplus raw material for preparing combustion material for burning odorous gas recovered from equipment 2 in one building B-3 in a deodorizing furnace 5. As for the surplus coating liquid, the surplus coating liquid in any one piece of equipment 2 or any two or more pieces of equipment 2 can be used as a combustion material. [Explanation of symbols]

[0044] A Deodorizing System 1 Coating device 2 Equipment 3. Odor gas recovery device 4. Combustion material preparation equipment 5 Deodorizing furnace 6. Deodorizing equipment

Claims

1. An apparatus having a coating device for applying a coating liquid to a film to form a coating layer; A recovery device for recovering odorous gas generated from the facility; a deodorizing furnace for burning the recovered odorous gas together with a combustion material, The combustion material includes excess raw material of the coating liquid.

2. An apparatus having a coating device for applying a coating liquid to a film to form a coating layer; A recovery device for recovering odorous gas generated from the facility; a deodorizing furnace for burning the recovered odorous gas together with a combustion material, The combustion material comprises the coating liquid.

3. The deodorizing system according to claim 1 or 2, wherein the combustion material has a viscosity of 1 mPa·s or more and 50 mPa·s or less.

4. 4. The deodorizing system according to claim 3, wherein the combustion material is supplied into the deodorizing furnace in the form of mist.

5. 2. The odor removal system of claim 1, wherein the combustion material comprises a mixture of two or more of the excess feedstock materials.

6. The deodorizing system according to claim 5 , wherein one of the surplus raw materials is an adhesive, and the other of the surplus raw materials is an organic solvent.

7. 3. The deodorization system according to claim 1, wherein the odorous gas is combusted together with the combustion material and fossil fuel in the deodorization furnace.

8. A step of collecting an odorous gas generated from an equipment having a coating device that applies a coating liquid to a film to form a coating layer; and a step of introducing the recovered odorous gas into a deodorizing furnace and combusting the odorous gas with a combustor in the deodorizing furnace to deodorize the odorous gas. The deodorization method, wherein the combustion material includes the coating liquid or an excess raw material of the coating liquid.

Images