Organic matter treatment device and organic matter treatment method

Abstract

To make it possible to prevent the wear of photocatalytic particles and to eliminate or reduce the need for maintenance.SOLUTION: A organic matter processing device processes a to-be-treated gas, which is a gas comprising organic matter. This device comprises: an organic matter processing part comprising a first case with photocatalytic particles sealed therein; a heating part with a first heater for heating the photocatalytic particles; and a supply part for supplying the to-be-treated gas to the organic matter processing part. The photocatalytic particles fill the first case up to its top.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an organic matter treatment apparatus and an organic matter treatment method. [Background technology]

[0002] Patent Document 1 discloses a method in which an organic substance is brought into contact with photocatalyst particles, and a target substance is oxidized or decomposed by the photocatalyst activated by heating and oxygen. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-325980 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the invention described in Cited Document 1, photocatalyst particles are suspended to promote the treatment, but suspending the photocatalyst particles causes the photocatalyst particles to wear down. As a result, the photocatalyst particles that have worn down must be periodically replenished, which creates a problem of time-consuming maintenance.

[0005] The present invention has been made in view of the above circumstances, and aims to provide an organic matter treatment device and an organic matter treatment method that can prevent wear of photocatalyst particles and reduce the labor required for maintenance. [Means for solving the problem]

[0006] To solve the above problems, the present invention provides an organic matter treatment device for treating a gas to be treated, which is a gas containing organic matter, comprising: an organic matter treatment device having a first case in which photocatalyst particles are sealed inside, a heating unit having a first heating unit for heating the photocatalyst particles, and a supply unit for supplying the gas to be treated to the organic matter treatment device, wherein the photocatalyst particles are filled up to the top of the first case. The present invention also provides an organic matter treatment device for treating a gas to be treated, which is a gas containing organic matter, comprising: an organic matter treatment device having a first case in which photocatalyst particles are sealed inside, a heating unit having a first heating unit for heating the photocatalyst particles, and a supply unit for supplying the gas to be treated to the organic matter treatment device, wherein the supply unit supplies the gas to be treated at a wind speed sufficient to not move the photocatalyst particles inside the first case.

[0007] Another aspect of the present invention provides an organic matter treatment method, for example, a method for treating a gas to be treated, which is a gas containing organic matter, by supplying the gas to be treated to an organic matter treatment unit having a first case with heated photocatalyst particles sealed therein, wherein the photocatalyst particles are filled up to the top of the first case.Another aspect of the present invention provides an organic matter treatment method, for example, a method for treating a gas to be treated, which is a gas containing organic matter, by supplying the gas to be treated to an organic matter treatment unit having a first case with heated photocatalyst particles sealed therein, wherein the gas to be treated is treated, wherein the gas to be treated is supplied to the first case at a wind speed that does not move the photocatalyst particles inside the first case.

[0008] According to the organic matter treatment device of the present invention, the photocatalyst particles are filled up to the top of the first case, or the gas to be treated is supplied at a wind speed that does not move the photocatalyst particles inside the first case, so the gas to be treated is treated in the organic matter treatment section without moving the photocatalyst particles inside the first case. This prevents wear on the photocatalyst particles and reduces the maintenance effort.

[0009] The supply unit may supply the gas to be treated at a wind speed of 0.13 m / s or less, thereby enabling efficient treatment of organic matter.

[0010] The organic matter treatment device may have an inlet for allowing the gas to be treated to flow in, and a second case provided between the inlet and the first case, the inside of the second case being free of photocatalyst particles, and the heating unit may have a second heating unit for heating the inside of the second case. This prevents a decrease in the temperature of the photocatalyst particles, enabling efficient treatment of organic matter.

[0011] The first heating unit may heat the photocatalyst particles at the center of the first case to about 300° C.±30° C. The second heating unit may heat the photocatalyst particles at the center of the first case to about 450° C. or more and about 550° C. or less, and the second heating unit may heat the inside of the second case to about 500° C. or more and about 520° C. or less at the center of the second case. This allows efficient treatment of organic matter. [Effects of the Invention]

[0012] This prevents wear on the photocatalytic particles and reduces the need for maintenance. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram showing an outline of an organic matter treatment apparatus 1. FIG. [Figure 2] 1A and 1B are diagrams showing an outline of the case 11, in which (A) shows that the photocatalyst particles 12 are almost entirely enclosed in the case 11, and (B) shows that the photocatalyst particles 12 are almost half enclosed in the case 11. [Figure 3] 10 is a graph showing the residual rate of gas at the inlet and outlet. [Figure 4]This is a graph showing the temperature change during the test, where (A) is the case when almost all of the photocatalyst particles are enclosed in the case, (B) is the case when almost half of the photocatalyst particles are enclosed in the case, and (C) is the case when only glass beads are enclosed in the case. [Figure 5] FIG. 1 is a diagram showing an outline of an organic matter treatment apparatus 1A. [Figure 6] FIG. 2 is a diagram showing an outline of an organic matter treatment device 2. [Figure 7] 1A and 1B are diagrams showing the internal state of the case 11 when the test is conducted, where (A) is filled with photocatalyst particles 12 and glass beads 51, and (B) is filled with glass beads 51 only. [Figure 8] 1 is a graph showing the residual rate of gases, where (A) is for toluene gas, (B) is for ethanol gas, and (C) is for methyl mercaptan gas. [Figure 9] This is a graph showing the temperature change during the test, where (A) is when the photocatalyst particles are sealed in the case and the airflow rate is 10 mL / min, (B) is when the photocatalyst particles are sealed in the case and the airflow rate is 20 mL / min, and (C) is when the photocatalyst particles are not sealed in the case (only glass beads) and the airflow rate is 10 mL / min. DETAILED DESCRIPTION OF THE INVENTION

[0014] An embodiment of the present invention will be described below with reference to the drawings. The organic matter treatment device of the present invention is a device for treating a gas to be treated, which is a gas containing organic matter. In the following embodiment, toluene, ethanol, and methyl mercaptan are used as the organic matter, and toluene gas, ethanol gas, and methyl mercaptan gas, which are obtained by diluting and gasifying toluene, ethanol, and methyl mercaptan, are used as the gas to be treated. However, the organic matter and the gas to be treated of the present invention are not limited to these. The organic matter may also be, for example, acetone, ethyl acetate, etc.

[0015] First Embodiment 1 is a diagram showing an outline of an organic matter treatment device 1. The organic matter treatment device 1 mainly comprises an organic matter treatment unit 10, a heating unit 20, a supply unit 30, and a cooling unit 35. The organic matter treatment unit 10 and the supply unit 30, and the organic matter treatment unit 10 and the cooling unit 35 are connected by piping 40 (41, 42).

[0016] The organic matter treatment unit 10 mainly has a case 11 (corresponding to the first case of the present invention) and a heat-retaining case 13. The heat-retaining case 13 is provided so as to cover the case 11. However, the heat-retaining case 13 is not essential.

[0017] 2 is a diagram showing an outline of the case 11. Inside the case 11, a plurality of photocatalyst particles 12 are enclosed.

[0018] Case 11 has, for example, a substantially cylindrical shape with both ends covered. However, the shape of case 11 is not limited to this, and may be any cylindrical shape with both ends covered. In FIG. 2, for the sake of explanation, case 11 is made using a transparent resin so that the interior can be seen, but the material of case 11 is not limited to this. For example, case 11 may be made using heat-resistant glass such as quartz glass or borosilicate glass, or may be made using metal.

[0019] A pipe 41 is provided at the upper end of the case 11, and a pipe 42 is provided at the lower end of the case 11. The gas to be treated flows into the inside of the case 11 through the pipe 41, and the gas to be treated flows out of the case 11 through the pipe 42.

[0020] The photocatalyst particles 12 are catalyst particles that are activated by light. For example, titanium dioxide (hereinafter referred to as titanium oxide), zinc oxide, etc. can be used as the photocatalyst. In this embodiment, titanium oxide particles are used as the photocatalyst particles 12. In this embodiment, the particle diameter of the photocatalyst particles 12 is about 1 to 2 mm, but the particle diameter is not limited to this. Furthermore, in this embodiment, the photocatalyst particles 12 are spherical, but the particle shape is not limited to spherical.

[0021] 2(A) shows a state in which almost the entire amount of the photocatalyst particles 12 (the volume of the photocatalyst particles 12 is almost the same as the volume of the case 11) is enclosed in the case 11. That is, in FIG. 2(A), the photocatalyst particles 12 are filled up to the top end of the case 11.

[0022] When using a cylindrical case 11 with a diameter of 40 mm, approximately 100 mL of photocatalyst particles 12 is used, and the photocatalyst particles 12 are filled up to the top of the case 11. In this state, the photocatalyst particles 12 are filled inside the case 11 without any gaps (i.e., adjacent photocatalyst particles 12 are in contact with each other), and when, for example, spherical titanium oxide particles 12 with a diameter of 1 to 2 mm (Sakai Chemical Industry Co., Ltd. CS-300S-12) are used as the photocatalyst particles 12, the filling density is 1.1 kg / L.

[0023] 2(B) shows that approximately half of the photocatalyst particles 12 are enclosed in the case 11 (the volume of the photocatalyst particles 12 is approximately half the volume of the case 11). When using a cylindrical case 11 with a diameter of 40 mm, half of the photocatalyst particles 12 are enclosed in the case 11 by using 50 mL of the photocatalyst particles 12.

[0024] Returning to the explanation of FIG. 1, the heating unit 20 heats the photocatalyst particles 12 and mainly includes a heater 21 and a temperature controller 22. The heater 21 is a heater that uses an electric heating wire, such as a sheathed heater or a nichrome wire heater. The heater 21 is wound around the side of the case 11. Since the case 11 is made of metal, the heat of the heater 21 is transferred to the photocatalyst particles 12 via the case 11, thereby heating the photocatalyst particles 12. Note that, although the heater 21 is wound around the outer circumferential surface of the case 11 in FIG. 1, the heater 21 may also be wound around the inner circumferential surface of the case 11.

[0025] The temperature controller 22 is connected to the heater 21. A temperature sensor (not shown) is provided inside or on the side of the case 11, and the temperature controller 22 adjusts the temperature of the heater 21 based on the temperature measured by the temperature sensor. In this embodiment, the temperature sensor is provided inside the case 11, in a portion where the photocatalyst particles 12 are enclosed when approximately half of the photocatalyst particles 12 are enclosed in the case 11 (see FIG. 2(B)). In this way, the temperature sensor comes into contact with the photocatalyst particles 12 and directly measures the temperature of the photocatalyst particles 12, allowing the temperature controller 22 to control the temperature of the heater 21 so that the temperature of the photocatalyst particles 12 is constant.

[0026] A supply unit 30 is provided upstream of the organic matter treatment unit 10. The supply unit 30 has, for example, a blower, and supplies the gas to be treated to the organic matter treatment unit 10. The gas to be treated is supplied from the supply unit 30 to the organic matter treatment unit 10 via a pipe 41.

[0027] A cooling section 35 is provided downstream of the organic matter treatment section 10 to cool the gas to be treated that has passed through the organic matter treatment section 10. The cooling section 35 is not essential.

[0028] Next, we will explain a method for treating a gas to be treated using the organic matter treatment device 1. The supply unit 30 supplies the gas to be treated to the organic matter treatment unit 10, in this case, a case 11 containing heated photocatalyst particles 12 inside. As a result, the gas to be treated hits the photocatalyst particles 12, and the organic matter contained in the gas to be treated is decomposed by the photocatalyst particles 12. At this time, the gas to be treated is treated without moving the photocatalyst particles 12 inside the case 11.

[0029] To keep the photocatalyst particles 12 from moving inside the case 11, specifically, the photocatalyst particles 12 are filled up to the upper end of the case 11. Alternatively, to keep the photocatalyst particles 12 from moving inside the case 11, specifically, the gas to be treated is supplied to the case 11 at a wind speed that does not move the photocatalyst particles 12 inside the case 11.

[0030] Table 1 and FIG. 3 show the results of treating gas to be treated with the organic matter treatment device 1. Test condition 1 in Table 1 is a case where approximately 100 mL of photocatalyst particles 12 was used, and the photocatalyst particles 12 were filled up to the top of the case 11. In this test, toluene gas was used as the gas to be treated. Test condition 2 in Table 1 is a case where approximately 50 mL (half the amount of the case 11) of photocatalyst particles 12 was used, and glass beads and photocatalyst particles 12 of the same volume as the photocatalyst particles 12 were filled up to the top of the case 11. In test condition 2, glass beads were enclosed in the bottom and top of the case 11 so that the photocatalyst particles 12 were located in the center of the case 11. Test condition 3 in Table 1 is a case where the glass beads were filled up to the top of the case 11. In test conditions 1 to 3, at least one of the photocatalyst particles 12 and the glass beads was filled up to the top of the case 11, so the photocatalyst particles 12 did not move inside the case 11. Although the glass beads used were spherical and had a particle size of 1.5 mm to 2.5 mm, the shape and particle size of the glass beads are not limited to this.

[0031] This experiment was conducted under the conditions that the gas concentration of the gas to be treated was about 660 ppm and the temperature of the photocatalyst particles 12 was 300°C ± 30°C. In this experiment, the supply amount of the gas to be treated was 10 L per minute. Since the case 11 used in the experiment had a cylindrical shape with a diameter of 40 mm, the flow rate was 0.13 m per second (0.13 m / sec). [Table 1]

[0032] The inlet and outlet concentrations in Table 1 were measured by collecting the gas to be treated in a bag near the boundary between the case 11 and the pipes 41 and 42, and measuring the toluene concentration in the gas to be treated in the bag. The concentration was measured using a gas chromatograph-flame ionization detector (GC-FID method). The decay rate in Table 1 was calculated using the following formula (1). Reduction rate (%) = (Inlet concentration - Outlet concentration) / Inlet concentration × 100 (1)

[0033] Figure 3 shows the residual rate of gas at the inlet and outlet. The residual rate at the outlet is the ratio of the outlet concentration to the inlet concentration, and was calculated by dividing the outlet concentration by the inlet concentration x 100. Furthermore, because no processing has been performed at the inlet yet, the residual rate at the inlet is 100%.

[0034] As can be seen from Table 1 and FIG. 3, a decay rate of 90% or more was obtained in both cases (test conditions 1 and 2) when half or all of the photocatalyst particles 12 were placed in case 11. In other words, it was found that when half or all of the photocatalyst particles 12 were placed in case 11, 90% or more of the toluene was decomposed. Furthermore, the decay rate when half or all of the photocatalyst particles 12 were placed in case 11 was significantly higher than the decay rate when no photocatalyst particles 12 were placed in case 11. Furthermore, when half or all of the photocatalyst particles 12 were placed in case 11, the residual rate was significantly lower than when no photocatalyst particles 12 were placed in case 11. This shows that toluene is efficiently treated by the photocatalyst particles 12 in case 11.

[0035] Furthermore, when the entire amount of photocatalyst particles 12 was placed in case 11 (test condition 1), the attenuation rate was higher than when half the amount of photocatalyst particles 12 was placed in case 11 (test condition 2). Furthermore, when the entire amount of photocatalyst particles 12 was placed in case 11, the residual rate was significantly lower than when half the amount of photocatalyst particles 12 was placed in case 11. This shows that more toluene is treated when the amount of photocatalyst particles 12 is greater.

[0036] Fig. 4 is a graph showing temperature changes during testing. The heater 24 was controlled by the temperature controller 22 so that the temperature at the center of the case 11 was 300°C. Temperature measurements were taken at the inlet of the gas flow path (piping 41) (see Fig. 1a), the inlet of the case 11 (see Fig. 1b), the center of the case 11 (see Fig. 1c), the outlet of the case 11 (see Fig. 1d), and the outlet of the gas flow path (piping 42) (see Fig. 1e). Fig. 4 shows that in all cases, the photocatalyst particles 12 or glass beads at the center of the case 11 were heated to approximately 300±30°C.

[0037] Next, we will explain the movement of the photocatalyst particles 12. In the present invention, in order to prevent wear of the photocatalyst particles, the supply unit 30 does not move the photocatalyst particles 12 (does not allow them to float or diffuse, etc.). For this reason, the amount of gas to be treated supplied was changed and the movement of the photocatalyst particles 12 was observed.

[0038] Table 2 shows the results of observing the movement of the photocatalyst particles 12 when the supply amount of the gas to be treated was changed. In this experiment, the case 11 was made of a transparent material, and the state inside the case 11 was observed. The case 11 used in the experiment had a cylindrical shape with a diameter of 40 mm. "Full container volume" in Table 2 represents the case where approximately 100 mL of photocatalyst particles 12 was filled into the case 11 (see Figure 2(A)), and "Half container volume" in Table 2 represents the case where approximately 50 mL of photocatalyst particles 12 was filled into half of the case 11 (see Figure 2(B)). [Table 2]

[0039] From Table 2, it was found that the photocatalyst particles 12 do not move when the supply rate of the gas to be treated is 40 L per minute (wind speed 0.52 m / sec) or less, whether the photocatalyst particles 12 are half-full or fully placed in the case 11. Therefore, regardless of the amount of photocatalyst particles 12, as long as the supply unit 30 supplies the gas to be treated to the organic matter treatment unit 10 at a wind speed of 0.52 m / sec or less, the organic matter treatment device 1 can treat the gas to be treated without moving the photocatalyst particles 12 inside the case 11.

[0040] According to this embodiment, organic matter contained in the gas to be treated can be decomposed using the photocatalyst particles 12. Furthermore, by supplying the gas to be treated from the supply unit 30 so as not to move the photocatalyst particles 12 inside the case 11, it is possible to prevent wear of the photocatalyst particles and reduce the maintenance work.

[0041] Furthermore, according to this embodiment, the supply amount of the gas to be treated is reduced to a flow rate of 0.13 m per second (0.13 m / sec) or less, thereby making it possible to treat organic matter efficiently.

[0042] In this embodiment, the heater 21 is wrapped around the side surface of the case 11 to heat the photocatalyst particles 12, but the method of heating the photocatalyst particles 12 is not limited to this. Fig. 5 is a diagram showing an outline of an organic matter treatment device 1A according to a modified example. The organic matter treatment device 1A mainly comprises an organic matter treatment device 10, a heating unit 20A, a supply unit 30, and a cooling unit 35.

[0043] The heating unit 20A heats the photocatalyst particles 12, and mainly includes a heater 23 and a temperature controller 22. The heater 23 is a heater that uses an electric heating wire, similar to the heater 21. The heater 23 is provided inside the case 11, and is in contact with the photocatalyst particles 12 inside the case 11. This allows the heat of the heater 23 to be directly transferred to the photocatalyst particles 12.

[0044] <Second embodiment> An organic matter treatment apparatus 2 according to a second embodiment of the present invention will be described below. Note that the same parts as those in the organic matter treatment apparatus 1 are given the same reference numerals and descriptions thereof will be omitted.

[0045] 6 is a diagram showing an outline of the organic matter treatment apparatus 2. The organic matter treatment apparatus 2 mainly includes an organic matter treatment section 10A, a heating section 20B, a supply section 30, and a cooling section 35. The organic matter treatment section 10A and the supply section 30 are connected by a pipe 40.

[0046] The organic matter treatment unit 10A mainly has a case 11, a heat-retaining case 13A, and a case 14 (corresponding to the second case of the present invention). The heat-retaining case 13A is different in size from the heat-retaining case 13, and is provided so as to cover the cases 11 and 14. However, the heat-retaining case 13A is not essential.

[0047] The case 14 is provided upstream of the case 11. The gas to be treated supplied from the supply unit 30 first flows into the case 14. The inside of the case 14 is hollow. Furthermore, the photocatalyst particles 12 are not provided inside the case 14.

[0048] The heating section 20B mainly includes a heater 25 for heating the photocatalyst particles 12, a heater for heating the inside of the case , and temperature controllers 22 and .

[0049] The heater 24 is a heater using an electric heating wire, and is provided inside the case 14. It is desirable that the heater 24 be provided near the center of the case 14. The heater 24 heats the gas to be treated inside the case 14, and the heated gas to be treated is supplied to the case 11. The heater 25 is a heater using an electric heating wire like the heater 21, and is wound around the side of the case 11. The heater 25 is wound along the inner circumferential surface of the case 11, and comes into contact with a part of the photocatalyst particles 12 provided inside the case 11.

[0050] The temperature controller 22 is connected to the heater 25. The temperature controller 26 is connected to the heater 24. Temperature sensors (not shown) are provided in the cases 11, 14, etc. Based on the temperatures measured by the temperature sensors, the temperature controller 22 adjusts the temperature of the heater 25, and the temperature controller 26 adjusts the temperature of the heater 24.

[0051] Next, a method for treating a gas to be treated using the organic matter treatment device 2 will be described. The supply unit 30 supplies the gas to be treated to the organic matter treatment unit 10, here first to the case 14 and then to the case 11. That is, the gas to be treated supplied from the supply unit 30 first flows into the case 14. Because a heater 24 is provided inside the case 14, the gas to be treated supplied from the supply unit 30 is heated by coming into contact with the heater 24 as it passes inside the case 14, and the heated gas to be treated is led to the case 11. In the case 11, the gas to be treated is treated without moving the photocatalyst particles 12.

[0052] Next, the test results of treating gas to be treated with the organic matter treatment device 2 will be described. Tables 3 to 5 show the test results. In this test, three types of gas to be treated were used: toluene gas, ethanol gas, and methyl mercaptan gas, and the concentration of each gas was approximately 200 ppm. The supply rate of the gas to be treated was 10 L per minute (flow rate of case 11: 0.13 m per second) or 20 L per minute (flow rate of case 11: 0.26 m per second). A case 11 with a capacity of 100 mL was used, and a comparison was made between a case in which 50 mL of photocatalyst particles 12 and 50 mL of glass beads 51 were enclosed inside the case 11 and a case in which 100 mL of glass beads 51 were enclosed inside the case 11.

[0053] FIG. 7 is a diagram schematically illustrating the state inside the case 11 during the test; (A) shows the case where the case 11 was filled halfway with photocatalyst particles 12 and halfway with glass beads 51, and (B) shows the case where the case 11 was filled only with glass beads 51. In FIG. 8(A), 35 ml of glass beads 51, 50 ml of photocatalyst particles 12 (half of the case 11), and 15 ml of glass beads 51 were layered from the bottom of the case 11. Since the capacity of the case 11 is 100 ml, the photocatalyst particles 12 and glass beads 51 were filled up to the top of the case 11. In FIG. 8(B), the glass beads were filled up to the top of the case 11. The photocatalyst particles 12 and glass beads 51 were the same as those used in the test shown in Table 1. In both cases, the gas to be treated was treated while the photocatalyst particles 12 and glass beads 51 were not moving inside the case 11.

[0054] The test was performed in the following order. First, after the temperature of the organic matter treatment device 2 had stabilized (see FIG. 9 , described in detail later), toluene gas was introduced, and three samples (n = 3) were collected from the inlet (see FIG. 6 a) of the gas flow path (pipe 41) and the outlet (see FIG. 6 f) of the gas flow path (pipe 42). Next, after about five minutes had passed since the temperature of the organic matter treatment device 2 had stabilized (see FIG. 9 , described in detail later), ethanol gas was introduced, and three samples (n = 3) were collected from the inlet and outlet of the gas flow path. After about five minutes had passed since the temperature of the organic matter treatment device 2 had stabilized (see FIG. 9 , described in detail later), methyl mercaptan gas was introduced, and three samples (n = 3) were collected from the inlet and outlet of the gas flow path. The inlet and outlet concentrations were measured by collecting the gas to be treated in a bag at the gas flow path inlet and outlet, respectively, and measuring the concentrations of toluene gas, ethanol gas, and methyl mercaptan gas in the gas to be treated in the bag.

[0055] Table 3 shows the test results using toluene gas, Table 4 shows the test results using ethanol gas, and Table 5 shows the test results using methyl mercaptan gas. Figure 8 shows graphs showing the residual gas rates at the gas flow path inlet and outlet, where (A) is for toluene gas, (B) is for ethanol gas, and (C) is for methyl mercaptan gas. Concentrations were measured using a gas chromatograph-flame ionization detector (GC-FID method). The decay rate was calculated using Equation (1) (described above). The residual rate was calculated in the same way as in Figure 3. [Table 3] [Table 4] [Table 5]

[0056] As can be seen from Table 1, when half the amount of photocatalyst particles 12 was placed in the case 11, the attenuation rate was higher and the residual rate was lower than when only glass beads 51 were used. This shows that the photocatalyst particles 12 treated all organic substances, namely toluene gas, ethanol gas, and methyl mercaptan gas. Furthermore, of the three types of organic substances, the photocatalyst particles 12 efficiently treated toluene gas and ethanol gas. In particular, in the case of toluene gas, which is used as an indicator for evaluating deodorizing devices, the attenuation rate was 9.1% with only glass beads 51, whereas the attenuation rate was significantly higher when photocatalyst particles 12 were used, demonstrating that the photocatalyst particles 12 efficiently treated toluene gas.

[0057] It should be noted that the experiments shown in Tables 3 to 5 were conducted with half the amount of photocatalyst particles 12 placed in case 11. When the full amount of photocatalyst particles 12 is placed in case 11, the attenuation rate is higher than when half the amount of photocatalyst particles 12 is placed in case 11 (see Table 1). Therefore, when the full amount of photocatalyst particles 12 is placed in case 11 (the photocatalyst particles 12 are filled up to the top of case 11), results that are equal to or better than the results shown in Tables 3 to 5 and Figure 8 may be obtained.

[0058] 9 is a graph showing temperature changes during testing. Heaters 24 and 25 were controlled by temperature controllers 22 and 26 so that the measurement results of the temperature sensors in the centers of cases 11 and 14 were approximately 500°C. Temperature measurements were taken at the gas flow path inlet (see FIG. 5a), case 14 inlet (see FIG. 5b), the center of case 14 (see FIG. 5c), the center of case 11 (see FIG. 5d), the case 11 outlet (see FIG. 5e), and the gas flow path outlet (see FIG. 5f). As a result, the temperature in the center of case 14 was approximately 500°C or higher and approximately 520°C or lower, and the temperature of the photocatalyst particles 12 or glass beads 51 in the center of case 11 was approximately 500°C ± 50°C (approximately 450°C or higher and approximately 550°C or lower). Furthermore, when gas was sampled (see the shaded areas in FIG. 9), the measurement results of the temperature sensors at the center of both cases 11 and 14 were stable at approximately 500°C.

[0059] When the photocatalyst particles 12 were sealed in the case 11, the temperatures at the case 11 outlet (see e in FIG. 5) and the gas flow path outlet (see f in FIG. 5) were higher when the airflow rate was 20 mL / min (see FIG. 9(B)) than when the airflow rate was 10 mL / min (see FIG. 9(A)). It is generally believed that an increase in the airflow rate reduces the contact time between the gas and the photocatalyst particles 12, thereby decreasing the attenuation rate. However, in the case of toluene gas (see Table 3), the attenuation rate was higher when the airflow rate was 20 mL / min than when the airflow rate was 10 mL / min. This is thought to be because the increased airflow rate caused the gas to pass through the case 11 more quickly, resulting in higher temperatures at the case 11 outlet and the gas flow path outlet (see e and f in FIG. 5).

[0060] According to this embodiment, the gas to be treated is heated in the case 14, so the photocatalyst particles 12 in the case 11 are less likely to be cooled by the gas to be treated. This prevents the temperature of the photocatalyst particles 12 from decreasing, and enables efficient treatment of organic matter.

[0061] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and design modifications within the scope of the gist of the present invention are also included. For example, the above examples have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add, delete, or replace other configurations to the configuration of one embodiment.

[0062] In addition, in the present invention, the term "approximately" is a concept that includes not only cases where the shape is strictly identical, but also errors or deformations that do not cause loss of identity. For example, "approximately cylindrical shape" is not limited to a strictly cylindrical shape. Furthermore, for example, when simply expressing "approximately centered," it includes not only cases where the shape is strictly centered, but also cases where the shape is approximately centered. Furthermore, for example, "approximately 500°C" is not limited to cases where the shape is strictly 500°C, but includes errors of about ±5°C.

[0063] Furthermore, "vicinity" means including a certain range (which can be arbitrarily determined) near a reference position. For example, "near an edge" is a concept that indicates a certain range near the edge, which may or may not include the edge. [Explanation of symbols]

[0064] 1, 1A, 2: Organic matter treatment equipment 10, 10A: Organic matter treatment section 11: Case 12: Photocatalyst particles 13, 13A: Insulated case 14: Case 20, 20A, 20B: Heating section 21, 23, 24, 25: Heater 22, 26: Temperature controller 30: Supply section 35: Cooling section 40, 41, 42: Piping

Claims

1. An organic matter treatment apparatus for treating a gas to be treated, which is a gas containing organic matter, an organic matter treatment unit having a first case in which photocatalytic particles are sealed, an inlet for allowing the gas to be treated to flow in, and a second case provided between the inlet and the first case; a heating unit having a first heating unit that heats the photocatalyst particles and a second heating unit that heats the inside of the second case; a supply unit that supplies the gas to be treated to the organic matter treatment unit; Equipped with The photocatalyst particles are filled up to the upper end of the first case, The photocatalyst particles are not provided inside the second case. An organic matter treatment device characterized by:

2. An organic matter treatment apparatus for treating a gas to be treated, which is a gas containing organic matter, an organic matter treatment unit having a first case in which photocatalytic particles are sealed, an inlet for allowing the gas to be treated to flow in, and a second case provided between the inlet and the first case; a heating unit having a first heating unit that heats the photocatalyst particles and a second heating unit that heats the inside of the second case; a supply unit that supplies the gas to be treated to the organic matter treatment unit; Equipped with the supply unit supplies the gas to be treated at a wind speed of 0.13 m / s or less, The photocatalyst particles are not provided inside the second case. An organic matter treatment device characterized by:

3. The supply unit supplies the gas to be treated at a wind speed of 0.13 m / sec or less.

2. The organic matter treatment device according to claim 1, wherein the organic matter treatment device is a gas treatment device.

4. the first heating unit heats the photocatalyst particles in the center of the first case to a temperature of not less than approximately 450°C and not more than approximately 550°C; The second heating unit heats the inside of the second case so that the temperature of the center of the second case is equal to or higher than approximately 500°C and equal to or lower than approximately 520°C.

4. The organic matter treatment device according to claim 2 or 3.

5. An organic matter processing method for processing a gas to be processed, which is a gas containing organic matter, by supplying the gas to be processed to an organic matter processing device having a first case in which heated photocatalytic particles are sealed, an inlet portion through which the gas to be processed flows, and a second case provided between the inlet portion and the first case, An organic matter treatment method characterized by filling the photocatalyst particles up to the top of the first case, not providing the photocatalyst particles inside the second case, heating the photocatalyst particles and the inside of the second case, and supplying the treated gas to the organic matter treatment section.

6. An organic matter processing method for processing a gas to be processed, which is a gas containing organic matter, by supplying the gas to be processed to an organic matter processing device having a first case in which heated photocatalytic particles are sealed, an inlet portion through which the gas to be processed flows, and a second case provided between the inlet portion and the first case, An organic matter treatment method characterized in that the photocatalyst particles are not provided inside the second case, the photocatalyst particles and the inside of the second case are heated, and the gas to be treated is supplied to the organic matter treatment unit at a wind speed of 0.13 m / s or less.

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