TW202131997A - Porous substance regeneration apparatus - Google Patents

Abstract

Provided is a porous substance regeneration apparatus with which it is possible to regenerate a porous substance at a suitable temperature and to reduce equipment costs and required installation space. A porous substance regeneration apparatus 1 that regenerates a porous substance by which an adsorption material is adsorbed, the porous substance regeneration apparatus 1 having a porous substance tank 10 filled with the porous substance, heating devices 11 and 16 that heat a first gas channeled through the porous substance tank 10 so that the first gas comes into contact with the porous substance, and a combustion device 12 that combusts the desorbed adsorption material during regeneration of the porous substance, the porous substance regeneration apparatus 1 moreover being such that a second gas generated during combustion of the adsorption material in the combustion device 12 is used to heat the porous substance.

Description

Porous material regeneration device

The present invention relates to a porous material regeneration device.

A water treatment device is previously known, which uses an adsorbent such as a porous substance to adsorb the pollutants for the water to be treated containing pollutants such as organic compounds, so as to purify the water to be treated. The adsorbent that has adsorbed contaminants such as the adsorbate is desorbed and regenerated by heating, for example. There is known a water treatment device (for example, Patent Document 1 described later) that alternately performs adsorption and desorption of such adsorbed substances.

[Prior Technical Literature] (Patent Document) Patent Document 1: Japanese Patent Application Publication No. 2006-055713

[The problem to be solved by the invention] Patent Document 1 describes that in the desorption step of the water treatment device, air at 180°C is used as the heating gas. However, depending on the type of the adsorbate adsorbed in the adsorbent such as a porous substance, it may not be possible to desorb the adsorbate at the above-mentioned temperature. On the other hand, to increase the temperature of the heating gas, the capacity of the heating device must be increased, which may increase the cost and space of the device.

The present invention was completed in view of the above-mentioned problems, and its object is to provide a porous material regeneration device that can regenerate the porous material at an appropriate temperature, and can reduce equipment cost and installation space.

[Technical means to solve the problem] (1) The present invention relates to a porous material regeneration device, which is a porous material regeneration device that heats and regenerates the porous material that has adsorbed the adsorbate. It has: a porous material tank filled with the aforementioned porous material ; A heating device that heats the first gas, and the first gas circulates in the porous substance tank so as to contact the porous substance; and, a combustion device that desorbs the aforementioned porous substance during the regeneration Burning of the adsorbate; wherein the temperature during the regeneration of the porous material is in the range of 300°C to 800°C, and the second gas generated during the combustion of the adsorbate in the combustion device is used to heat the aforementioned Porous material.

(2) The porous material regeneration device according to (1), wherein the second gas is circulated in the porous material tank to heat the porous material.

(3) The porous material regeneration device according to (1) or (2), wherein the heating device includes a heat exchange device that performs heat exchange between the second gas and the first gas.

(4) The porous material regeneration device according to any one of (1) to (3), wherein the first gas contains water vapor, and has a water vapor generator that generates the water vapor.

(5) The porous material regeneration device according to (4), wherein the second gas is heat exchanged in the water vapor generator.

(6) The porous material regeneration device according to any one of (1) to (5), wherein the fuel combusted together with the adsorbate is supplied to the combustion device.

(7) The porous material regeneration device according to any one of (1) to (6), wherein the porous material is activated carbon.

(8) The porous material regeneration device according to any one of (1) to (7), wherein the temperature at the time of regeneration of the porous material is the adsorbate adsorbed in the porous material The temperature above the temperature at which at least one of evaporation and decomposition begins, and is a temperature lower than the temperature at which decomposition of the aforementioned porous material begins due to heating.

(9) The porous material regeneration device according to (8), wherein the temperature at which the adsorbate adsorbed in the porous material starts to evaporate and decompose, and the temperature at which the porous material is heated The temperature at which the decomposition begins is determined by thermogravimetric analysis of the porous material that has adsorbed the adsorbate, and measurement of the temperature at which the porous material that has adsorbed the adsorbate begins to lose weight.

(10) A water treatment device comprising the porous material regeneration device described in any one of (1) to (9), wherein the porous material tank filled with the porous material It is used as an adsorption layer through which the water to be treated can circulate, and the aforementioned adsorbed substance has been desorbed from the porous substance.

[Effects of the invention] According to the present invention, it is possible to provide a porous material regeneration device, which can regenerate the porous material at an appropriate temperature, and can reduce equipment cost and installation space.

Hereinafter, an embodiment of the present invention will be described. However, the embodiments shown below are for illustrating the present invention, but the present invention is not limited to the following embodiments.

[First Embodiment] Regarding the porous material regeneration device 1 of the embodiment of the present invention, as shown in Figure 1, it has a porous material tank 10, heating devices 11 and 16, a combustion device 12, a steam generator 13, a water softener 14, and a pump device. 15. And the pipelines L1, L2, L3, L4, L5 for liquid circulation. The porous material regeneration device 1 can be used as a water treatment device. It can regenerate porous materials, and use the regenerated porous materials to perform on-site water treatment. The porous materials can be used for on-site water treatment. Adsorption of processed material.

The porous material tank 10 is a tank filled with a porous material. The porous material filled in the porous material tank 10 is used for water treatment in which adsorbed substances such as organic compounds are adsorbed from the water to be treated to treat the water to be treated, and the adsorbed substances are adsorbed. The first gas is circulated in the porous substance tank 10, thereby performing at least one of evaporation and decomposition of the adsorbate, so that the adsorbed substance is desorbed from the porous substance, and the porous substance can be regenerated. In addition, in this specification, "desorption" means the opposite concept of "adsorption", and refers to the detachment of an object from the surface of an object by phenomena such as evaporation and decomposition. The water to be treated can be circulated in the porous material tank 10, and after regeneration of the porous material is performed, it can be used as an adsorption tank in water treatment.

Examples of the porous substance include carbonaceous materials such as activated carbon, and inorganic materials such as zeolite, alumina, titanium oxide, zirconium oxide, and silica. As the porous substance, activated carbon is preferably used. The activated carbon is not particularly limited, and activated carbon derived from fossil carbon, petroleum, biomass, etc. can be applied. The shape is not particularly limited, and those having shapes such as powder, granules, molded products, fibers, etc. can be used. As the above-mentioned porous material, a mixture of two or more types can also be used.

Examples of the adsorbate include organic compounds such as carbohydrates, oxygen-containing compounds, nitrogen-containing compounds, sulfur-containing compounds, and halogen compounds. Regarding the porous material regeneration device 1 of the present embodiment, the adsorbed material can be desorbed from the porous material, and the adsorbed material has a boiling point of less than 100°C. The adsorbent is not particularly limited, and examples include benzene (boiling point around 80°C), trichloroethylene (boiling point around 87°C), and the like. Regarding the porous material regeneration device 1 of this embodiment, the porous material filled in the porous material tank 10 can be regenerated at an appropriate temperature. Therefore, even when an organic compound having a boiling point of 100° C. or higher or 200° C. or higher is included as the adsorbate, desorption of the adsorbate can be performed. There are no particular restrictions on the above-mentioned organic compounds, and examples include 1,4-dioxane (boiling point around 101°C), triethylene glycol (boiling point around 285°C), phenolic acid (boiling point around 182°C), and p-tertylphenol (Boiling point is around 280°C), polyethylene glycol, sodium dodecylbenzene sulfonate, etc.

In the porous substance tank 10, the first gas circulates so as to contact the porous substance. The first gas is, for example, at least one of the following: water vapor; nitrogen; carbon dioxide; rare gases such as helium and argon; and inert gases such as chlorofluorocarbon. It may be a mixture of two or more of the above-mentioned gases. The first gas preferably contains water vapor. The first gas contains water vapor, and the vaporization reaction of water vapor described later promotes the desorption caused by the decomposition of the adsorbed substance. In the following description, it is assumed that water vapor is contained in the first gas. Preferably, in the above, the first gas does not substantially contain oxygen. For example, it is preferable that the oxygen contained in the first gas is 0.01% by volume or less. According to the above, it is possible to use a carbonaceous material such as activated carbon that is degraded by reacting with oxygen as the porous material.

The first gas is heated and brought into contact with the porous substance, whereby the adsorbate is heated and desorbed from the porous substance. When the first gas contains water vapor, it is considered that the water vapor and the adsorbate adsorbed in the porous material will produce the water vapor vaporization reaction shown by the following chemical formula (1), and the chemical formula (2) The conversion reaction shown to decompose the adsorbate. C _n H _m +nH ₂ O=nCO+(n+m/2)H ₂ (1) nCO+nH ₂ O=nCO ₂ +nH ₂ (2)

The temperature during the regeneration of the porous material is 300°C to 800°C in this embodiment. The temperature during the regeneration is preferably, for example, 400°C or higher, and more preferably 500°C or higher. Furthermore, it is preferably 700°C or lower. The temperature during the regeneration of the porous material satisfies the above-mentioned conditions, whereby most of the adsorbed substances can be desorbed during the regeneration. In addition, when the porous material is activated carbon, the weight loss due to activation of activated carbon can be suppressed.

The temperature at the time of regeneration of the porous substance filled in the porous substance tank 10 is preferably a temperature higher than the temperature at which the adsorbate starts to evaporate and decompose at least one of the desorption. The temperature at which the adsorbate adsorbed in the porous substance is desorbed is the temperature above the boiling point of the adsorbate. For example, when p-tertylphenol (boiling point of about 280°C) is used as the adsorbate to regenerate activated carbon, which is a porous substance that has adsorbed the adsorbate, even if the temperature during the regeneration of the activated carbon is set to For example, at 280°C, the activated carbon cannot be regenerated. This is believed to be because the adsorbate forms chemical bonds through intermolecular forces and depending on the situation, and is adsorbed in the fine pores in porous materials such as activated carbon. In addition, the temperature at the time of regeneration of the porous material is preferably a temperature lower than the temperature at which the porous material starts to decompose due to heating. When the porous material is activated carbon, for example, the temperature at which the activated carbon starts to decompose varies depending on the type of the adsorbed material.

The temperature at which the adsorbate is desorbed and the temperature at which the porous material starts to decompose are preferably determined by thermogravimetric analysis. Thermogravimetric analysis can be carried out by measuring, for example, the weight change of the porous material that has adsorbed the adsorbate in a predetermined temperature range, for example, from room temperature to 1000°C. Thermogravimetric analysis can be performed using, for example, a thermogravimetric analysis device (TGA, Thermogravimetric analysis) and a thermogravimetric-thermal differential simultaneous measurement device (TG-DTA, Thermogravimetric-Differential thermal analysis). In addition, thermogravimetric analysis can be performed in an atmosphere such as nitrogen, argon, air, and water vapor. Since the temperature at which the porous material is decomposed by heating is to be measured, it is better to perform the analysis in a water vapor atmosphere.

The temperature at the time of the regeneration of the porous material is analyzed by the above-mentioned thermogravimetric analysis device, and is determined based on the temperature of at least one of the evaporation and decomposition of the adsorbate and the temperature at which the porous material starts to decompose due to heating . For example, the temperature of the first gas circulating in the porous material tank 10 is determined based on the temperature at which at least one of the vaporization and decomposition of the adsorbate starts, and the temperature is determined by the above-mentioned thermogravimetric analysis.

The heating devices 11 and 16 are devices for heating the first gas. The heating device 11 is not particularly limited, and is, for example, an electric heater device that can be energized and heated. When the first gas is water vapor, the heating device 11 heats the water vapor to generate superheated vapor at a predetermined temperature. The heating device 16 is a heat exchange device, and is provided on the upstream side of the heating device 11. The heating device 16 heats the first gas by performing heat exchange between the second gas described later and the first gas. The heat exchange device used as the heating device 16 is not particularly limited, and examples include heat exchange devices such as a double tube type, a double tube type, a shell and tube type, a spiral type, and a plate type.

The combustion device 12 burns the adsorbate desorbed during the regeneration of the porous material. The combustion device 12 is not particularly limited, and, for example, a direct combustion device, a catalytic combustion device, etc. can be used. The combustion device 12 includes a burner device, and mixes and burns air introduced from the outside with adsorbed substances such as organic compounds. The combustion device 12 may include a blower that can introduce air. By the above combustion, the adsorbate is decomposed into CO ₂ and H ₂ O, and deodorized and harmless. The exhaust gas discharged from the above-mentioned combustion device 12, that is, the second gas, is high-temperature, and will exchange heat with the first gas in the heating device 16 as a heat exchange device.

The steam generator 13 is a device that generates steam as the first gas. The steam generating device 13, such as a boiler device, can burn fuel to generate heat. The steam generator is equipped with a heat exchange device to exchange heat between the generated heat and water to vaporize the water to generate steam. The boiler device as the steam generator 13 may include a combustion chamber, an air blower, and the like. There is no particular limitation on this kind of boiler device, and a known device can be used.

The water softener 14 can remove the hardness components in the raw water and soften it. The water softener 14 includes, for example, an ion exchange resin. The ion exchange resin can absorb the hardness components such as Ca ions and Mg ions contained in the raw water, and release its own Na ions to replace it to soften the raw water. Thereby, it is possible to suppress the generation of scale on the line L1. As such a water softener 14, a conventional device can be used.

The pump device 15 can pump and circulate the water to be treated to the porous material tank 10. When the water to be treated is circulated in the porous material tank 10 by the pump device 15, the porous material tank 10 can be used as an adsorption tank in water treatment. The pump device 15 is not particularly limited, as long as it can pump liquid, and examples thereof include centrifugal pumps such as a vortex type, and volume (variation) pumps such as a diaphragm pump.

(Method of Regenerating Porous Substance Using Porous Substance Regenerating Device 1) The line L1, as shown in Fig. 1, is a path through which the first gas flows. In the pipeline L1, a water softener 14, a steam generator 13, a heating device 16, and a heating device 11 are provided in this order from the upstream side. Water, such as tap water, circulates to the water softener 14 through the line L1. In the pipeline L1, a pump device (not shown) for pressure-feeding water to the water softener 14 may be provided. The water softened by the water softener 14 flows into the steam generator 13 and is vaporized into steam as the first gas. The generated steam is heated to a boiling point or higher by the heating device 16 and the heating device 11, and becomes, for example, superheated steam of 300°C or higher. The above-mentioned superheated water vapor is circulated in the porous material tank 10 to desorb the adsorbate adsorbed in the porous material to regenerate the porous material.

The line L2 is a path through which the gas discharged from the porous substance tank 10 flows. The upstream side of the line L2 is connected to the porous substance tank 10. In the pipeline L2, a combustion device 12 is provided. The gas discharged from the porous substance tank 10 contains water vapor and adsorbed substances desorbed from the porous substance. The adsorbent contains organic compounds and the like, and it is undesirable if it is discharged to the outside without treatment. Therefore, the gas discharged from the porous substance tank 10 flows into the combustion device 12 through the line L2, and is mixed with air and burned. In this way, the adsorbate is deodorized and harmless.

The line L3 is a path through which the second gas discharged from the combustion device 12 flows. The upstream side of the pipeline L3 is connected to the combustion device 12. In the line L3, a heat exchange device, that is, a heating device 16 is provided. The second gas is a high-temperature gas, and includes gas generated by burning and decomposing the adsorbate, and water vapor. In the heating device 16, the first gas exchanges heat with the second gas higher in temperature than the first gas. That is, the second gas is used to indirectly heat the porous substance. The second gas after the heat exchange in the line L3 also has heat, so it can also be heat-conditioned with other systems. Since it has been deodorized and harmless, it can also be discharged to the outside.

(Drainage treatment method) Next, a method of using the porous material tank 10 as an adsorption tank and performing drainage treatment will be described. The porous material filled in the porous material tank 10 has been regenerated by the above-mentioned regeneration method. The pipeline L4, as shown in Figure 1, is a path through which the water to be treated circulates. In the pipeline L4, a pump device 15 is provided. For example, the water to be treated containing organic compounds is pumped by the pump device 15 and flows into the porous substance tank 10 serving as the adsorption tank through the line L4. The adsorbed substances such as organic compounds contained in the water to be treated are adsorbed in the porous substance filled in the porous substance tank 10 as an adsorption tank, thereby performing water treatment. The detoxified treated water after the adsorbate is adsorbed is discharged to the outside through the line L5, for example.

According to the porous material regeneration device 1 of the first embodiment described above, the following effects can be exhibited. In the porous material regeneration device 1, for the porous material tank 10 filled with the porous material (the adsorbed material has been adsorbed), the heated first gas is circulated to desorb the adsorbed material, so that The porous material is regenerated, and the second gas generated when the desorbed adsorbate is burned is used to heat the porous material. As described above, heating the first gas with the thermal energy of the second gas can indirectly heat the porous material, so energy consumption required for the regeneration of the porous material can be reduced. In addition, the device cost and installation space of the heating device 11 can be suppressed, and the temperature during the regeneration of the porous substance can be set to an appropriate temperature suitable for the desorption of the adsorbate.

[Second Embodiment] Next, a description will be given of the porous material regeneration device 1a according to the second embodiment of the present invention. In the following description, the description of the same configuration as that of the previously described embodiment may be omitted.

The porous material regeneration device 1a has heating devices 11a and 11b as shown in Fig. 2. The heating devices 11a and 11b, like the heating device 11, are electrothermal heater devices that can be energized and heated. The heating device 11a, like the heating device 11, is installed on the line L1 and heats the first gas. The heating device 11b is installed outside the porous material tank 10 and heats the porous material tank 10.

According to the porous material regeneration device 1a of the second embodiment, the following effects can be exhibited. In addition to the heating device 11a, a heating device 11b that can directly heat the porous substance tank is additionally installed, whereby the temperature of the first gas can be set to a high-temperature gas suitable for the desorption of the adsorbate. In addition, when the porous material in a state where moisture remains after the porous material tank 10 is used as an adsorption tank is heated, a large amount of heat is required in order to vaporize the moisture. With the heating device 11b, the heat required for the above-mentioned vaporization can be directly applied from the heating device 11b, so energy cost can be reduced. In addition, the moisture remaining in the porous material is vaporized, thereby promoting the desorption of the adsorbate.

[Third Embodiment] The porous material regeneration device 1b of the third embodiment has a combustion device 12a and a heating device 16a as shown in Fig. 3. As shown in Fig. 3, fuel is supplied to the combustion device 12a together with air. Such a combustion device 12a is, for example, a direct combustion device. The fuel is not particularly limited. For example, liquid fuels such as kerosene, heavy oil, and light oil, or gas fuels such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG) can be used. The above-mentioned fuel is combusted together with the adsorbate that is desorbed during the regeneration of the porous material. With the combustion device 12a, the second gas discharged from the combustion device 12a can be set to a higher temperature.

The heating device 16a is a heat exchange device and allows the second gas discharged from the combustion device 12a to circulate. The second gas flowing in the heating device 16a has a higher temperature than the second gas in the first and second embodiments. Therefore, even if no other heating device is provided on the line L1, the first gas can be sufficiently heated by the heat exchange between the second gas and the first gas.

According to the porous material regeneration device 1b of the third embodiment described above, the following effects can be exhibited. The porous material regeneration device 1b is configured to include a combustion device 12a, and fuel is supplied to the combustion device 12a together with air and combusted together with the adsorbate. Thereby, the second gas generated from the combustion device 12a can be increased in temperature. Therefore, the heat exchange between the second gas and the first gas can be performed using only the heating device 16a and the first gas can be heated, so the installation space of the porous material regeneration device can be reduced.

[Fourth Embodiment] As shown in Fig. 4, the porous material regeneration device 1c of the fourth embodiment has a porous material tank 10a. In addition, it has a combustion device 12a and a heating device 16a similar to those of the third embodiment.

The porous substance tank 10a, as shown in Fig. 4, allows the first gas and the water to be treated to circulate, and also allows the second gas to circulate. Fig. 7 is a longitudinal sectional view showing the structure of the porous material tank 10a. As shown in FIG. 7, the porous material tank 10 a has a filling part 101, a heat transfer tube 102, and a sleeve 103.

The filling part 101 is a space filled with a porous substance, for example, activated carbon. In the filling part 101, the first gas and the water to be treated may flow in through the inlet part 101a and flow out through the outlet part 101b. The water vapor as the first gas circulates through the filling section 101 so as to directly contact the activated carbon, thereby desorbing the adsorbate from the activated carbon. The water to be treated circulates in the filling section 101 in direct contact with the activated carbon, whereby the adsorbed substance contained is adsorbed on the activated carbon to be purified, and is discharged to the outside as treated water.

The heat transfer pipe 102 is a pipe through which the second gas discharged from the combustion device 12a can flow. As shown in FIG. 7, the heat transfer pipe 102 has a plurality of turn-back flow paths that circulate in the filling part 101. The above-mentioned flow path may have a branch in the filling part 101. Fig. 8 is a cross-sectional view taken along the line A-A' in Fig. 7; As shown in FIG. 8, the heat transfer pipe 102 circulates throughout the filling part 101. The second gas can flow into the heat pipe 102 through the heat pipe inlet 102a, and flow out of the heat pipe 102 through the heat pipe outlet 102b. The second gas having a high temperature circulates in the heat transfer tube 102, thereby heating the porous substance filled in the filling part 101. The material of the heat pipe 102 is not particularly limited, and, for example, stainless steel (SUS), titanium, copper, etc. can be used.

The sleeve 103, like the heat transfer tube 102, is a flow path through which the second gas discharged from the combustion device 12a can flow. As shown in FIGS. 7 and 8, the sleeve 103 is formed so as to cover the circumference of the filling part 101. As shown in FIG. The second gas can flow into the casing 103 through the casing inlet 103a, and flow out of the casing 103 through the casing outlet 103b. In addition to the heat transfer tube 102, a sleeve 103 is added to circulate the second gas, thereby allowing more heat to be applied to the porous material filled in the filling part 101.

(Method of Regenerating Porous Material Using Porous Material Regenerating Device 1c) The pipeline L1 and the pipeline L2 of the porous substance regenerating device 1c have the same configuration as that of the first embodiment, so the description is omitted. The line L31 and the line L32 are paths through which the second gas can circulate.

The line L31 is a path connecting the combustion device 12a and the porous substance tank 10a. The upstream side of the line L31 is connected to the combustion device 12a. The downstream side of the pipeline L31 is connected to the heat transfer pipe inlet 102a and the sleeve inlet 103a of the porous substance tank 10a. For example, when heating a porous material in a state where moisture remains after using the porous material tank 10a as an adsorption tank, a large amount of heat is required, so the second gas can be circulated in the heat transfer tube 102 and the sleeve 103 And heat the porous material. When there is no remaining moisture, the second gas may be circulated in either one of the heat transfer tube 102 and the sleeve 103 to heat the porous material.

The line L32 is a path on the downstream side of the porous substance tank 10a. The upstream side of the pipeline L32 is connected to the heat transfer pipe outlet 102b and the sleeve outlet 103b of the porous substance tank 10a. In the line L32, a heating device 16a is provided as a heat exchange device. Since the second gas discharged from the combustion device 12a still has a large amount of heat, it can perform heat exchange with the first gas in the heating device 16a, thereby heating the first gas.

[Fifth Embodiment] Regarding the porous material regeneration device 1d of the fifth embodiment, as shown in FIG. 5, a water vapor generator 13a is provided. In addition, it has the same porous substance tank 10a, combustion device 12a, and heating device 16a as in the fourth embodiment.

In the porous material regeneration device 1d, a steam generator 13a is additionally provided in addition to the heating device 16a in the pipeline L32, which is the path on the downstream side of the porous material tank 10a. The steam generating device 13a allows the second gas to circulate, and performs heat exchange between the second gas and water, thereby vaporizing the water to generate steam as the first gas. The second gas flowing out from the heating device 16a still has sufficient heat even after the heat exchange with the first gas is performed. Therefore, by providing the steam generator 13a on the downstream side of the heating device 16a, it is possible to further recover heat from the second gas. Therefore, the energy cost required for the regeneration of the porous material can be further reduced.

[Sixth Embodiment] Regarding the porous material regeneration device 1e of the sixth embodiment, as shown in FIG. 6, the porous material tank 10a, the combustion device 12a, the steam generator 13a, and the heating device 16a are the same as those of the fifth embodiment.

In the porous material regenerating device 1e, a heating device 16a that is a heat exchange device is provided in a line L31 that is a route on the upstream side of the porous material tank 10a. The upstream side of the line L31 is connected to the combustion device 12a. The second gas discharged from the combustion device 12a may have a high temperature of, for example, 800°C or higher. Therefore, instead of passing the second gas directly into the porous material tank 10a, the heat exchange device, that is, the heating device 16a, exchanges heat with the first gas and then circulates into the porous material tank 10a. With the above, the temperature of the second gas flowing into the porous material tank 10a can be controlled, and the temperature during the regeneration of the porous material can be set to an appropriate temperature.

Above, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above-mentioned embodiment, and can be appropriately changed within a range that does not impair the effects of the present invention.

The porous material regenerating device of the above-mentioned embodiment will be described with a single porous material tank 10 or 10a. However, it is not limited to the above. The porous material regeneration device may have a plurality of porous material tanks. For example, two porous substance tanks can be installed. As described above, while one porous material tank is used to perform water treatment, another porous material tank is used to perform regeneration or maintenance of the porous material, so that water treatment can be continuously performed. In addition, when the load of the water to be treated temporarily increases, the water to be treated is circulated to a plurality of porous material tanks to perform water treatment in parallel, thereby temporarily improving the water treatment capacity. In addition to the above, the number of porous substance tanks can be 3 or more. By this, it is possible to ensure the reserve capacity in the water treatment, so even when the load of the water to be treated fluctuates drastically, the water treatment can be performed.

[Porous material regeneration test] Regarding the porous material used in the porous material regeneration device of the above-mentioned embodiment, the porous material regeneration test was carried out by the following method.

(Constant temperature thermal analysis test) For the activated carbon as a porous material, sodium dodecylbenzene sulfonate (hereinafter referred to as "ABS") and polyethylene glycol (molecular weight 4000, hereinafter referred to as "PEG") are used as the adsorbent, and the adsorbed material is used. The activated carbon with a prescribed amount of the adsorbate is used as a sample for the test. A mixed gas of 20% water vapor and 80% nitrogen (water vapor partial pressure 20.2 kPa) is used as the first gas. The temperature conditions were performed from a temperature in the vicinity of 70 to 80°C at a temperature increase rate of 10°C/min to the respective specified temperatures shown in Table 1 below, and maintained at the respective specified temperatures for a total of 2 hours.

In the above constant temperature thermal analysis test, the weight of the desorbed adsorbate is divided by the initial weight of the adsorbate to define the regeneration rate R of activated carbon. Specifically, the regeneration rate R of activated carbon is obtained by the following formula (3). In addition, suppose that the sodium sulfate contained in ABS remains in the activated carbon that has adsorbed ABS, and the regeneration rate R is obtained. Regeneration rate R=(W _dry -W _t )/(W _dry ×A/100)×100 (3) Here, the symbols in the formula are as follows. R: Regeneration rate (%) at treatment time t W _dry : Dry sample weight (mg) W _t : Sample weight at treatment time t (mg) A: Initial adsorption rate of adsorbate (wt%)

The following Table 1 and Figure 9 show the regeneration rate R of activated carbon in which the adsorbate is ABS. The following Table 2 and Figure 10 show the regeneration rate R of activated carbon in which the adsorbate is PEG.

[Table 1]

[Table 2]

If referring to Table 1 and Figure 9, the regeneration rate R is 83.5% when the activated carbon with ABS is adsorbed and the regeneration is performed at 450°C for 120 minutes, and the regeneration rate R is 83.5% after the regeneration at 500°C for 120 minutes. The regeneration rate R reaches 100%. The regeneration rate R after regeneration after 30 minutes under the condition of 550°C reached 100%. Therefore, even if the temperature during the regeneration of activated carbon is set to the boiling point of ABS (about 205° C.) or higher, it means that the activated carbon cannot be completely regenerated in a short time at the regeneration temperature.

Referring to Table 2 and Figure 10, the regeneration rate R of the case where the activated carbon with PEG is adsorbed and the regeneration is performed at 350°C for 30 minutes is 86.5%, and the regeneration rate R after 60 minutes of regeneration is 100%. The regeneration rate R reaches 100% after 5 minutes at 400°C. Therefore, the comparison with Table 1 and Figure 9 shows that the optimal regeneration temperature is different depending on the type of the adsorbed substance of the activated carbon.

(Temperature temperature analysis test) Use activated carbon (stone carbon broken carbon, standard particle size 8/32 mesh, specific surface area 965m ² /g) as porous material activated carbon, prepare the above activated carbon and implement water treatment on site It becomes a state where the adsorbate has been adsorbed. A mixed gas of 20% water vapor and 80% nitrogen (water vapor partial pressure 20.2 kPa) is used as the first gas. The temperature rise conditions are from a temperature near 70 to 80°C and a temperature rise rate of 10°C/min to 1000°C. The results are shown in Figure 11.

Fig. 11 is a graph showing the results of the above-mentioned temperature-rising thermal analysis test. In Figure 11, the horizontal axis represents temperature (°C), and the vertical axis represents weight (mg). In Figure 11, the temperature change of the sample is represented by a solid line. As shown in Fig. 11, first, the weight decreases in the temperature range from around 80°C to around 100°C immediately after the start of the temperature increase. It is considered that this is caused by the evaporation of water contained in the activated carbon. Next, the temperature T1 indicates the start of weight loss. It is considered that this is caused by the desorption of the adsorbate caused by at least one of the evaporation and decomposition of the adsorbate adsorbed on the activated carbon. The above-mentioned weight reduction continues until the temperature T2 is reached, and the weight change thereafter assumes a fixed value. It is considered that this is because the adsorbate adsorbed on the activated carbon has all been desorbed. Next, the temperature T3 indicates the start of weight loss. It is considered that this is caused by the decomposition of activated carbon due to activation.

Based on the above analysis results, the temperature during the regeneration of activated carbon is set to a temperature above T1 and a temperature below T3, where T1 is the temperature at which the adsorbate starts to evaporate and decompose, and T3 is The temperature at which the activated carbon starts to decompose due to activation, thereby confirming that the desorption of the adsorbate can be performed, and the activated carbon is regenerated when the activated carbon is not decomposed due to the activation.

1,1a,1b,1c,1d,1e: Porous material regeneration device (water treatment device) 10, 10a: Porous substance tank (adsorption tank) 11, 11a, 11b: heating device (heater device) 12, 12a: Combustion device 13,13a: Steam generator (boiler) 14: Water softener 15: Pump device 16,16a: heating device (heat exchange device) 101: Filling Department 101a: entrance 101b: Export Department 102: heat pipe 102a: heat pipe inlet 102b: heat pipe outlet 103: Casing 103a: Casing inlet 103b: Casing outlet L1, L2, L3, L4, L5, L31, L32: pipeline

Fig. 1 is a diagram showing the configuration of a porous material regeneration device according to a first embodiment of the present invention. Fig. 2 is a diagram showing the configuration of a porous material regeneration device related to a second embodiment of the present invention. Fig. 3 is a diagram showing the configuration of a porous material regeneration device according to a third embodiment of the present invention. Fig. 4 is a diagram showing the configuration of a porous material regenerating device according to a fourth embodiment of the present invention. Fig. 5 is a diagram showing the configuration of a porous material regenerating device according to a fifth embodiment of the present invention. Fig. 6 is a diagram showing the structure of a porous material regenerating device according to a sixth embodiment of the present invention. Fig. 7 is a longitudinal cross-sectional view showing a porous material tank according to an embodiment of the present invention. Fig. 8 is a cross-sectional view taken along the line A-A' in the porous material tank of Fig. 7; Figure 9 is a graph showing the result of constant temperature thermal analysis of activated carbon that has adsorbed substances. Fig. 10 is a graph showing the result of constant temperature thermal analysis of activated carbon on which adsorbate has been adsorbed. Fig. 11 is a graph showing the result of temperature increase thermal analysis of activated carbon on which the adsorbate has been adsorbed.

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1: Porous material regeneration device (water treatment device)

10: Porous substance tank (adsorption tank)

11: Heating device (heater device)

12: Combustion device

13: Steam generator (boiler)

14: Water softener

15: Pump device

16: heating device (heat exchange device)

L1, L2, L3, L4, L5: pipeline

Claims (10)

A porous material regeneration device is a porous material regeneration device that heats and regenerates the porous material that has adsorbed the adsorbate. It has: Porous material tank, which is filled with the aforementioned porous material; A heating device that heats the first gas, and the first gas circulates in the porous substance tank in a manner of contacting the aforementioned porous substance; and, A combustion device that burns the adsorbed material that is desorbed during the regeneration of the porous material; Wherein, the temperature during regeneration of the aforementioned porous material is in the range of 300°C to 800°C, In addition, the second gas generated when the adsorbent is burned in the combustion device is used to heat the porous material. The porous material regeneration device according to claim 1, wherein the second gas is circulated in the porous material tank to heat the porous material. The porous material regeneration device according to claim 1 or 2, wherein the heating device includes a heat exchange device that performs heat exchange between the second gas and the first gas. The porous material regeneration device according to any one of claims 1 to 3, wherein the first gas contains water vapor, and has a water vapor generator that generates the water vapor. The porous material regeneration device according to claim 4, wherein the second gas is heat exchanged in the water vapor generator. The porous material regeneration device according to any one of claims 1 to 5, wherein the fuel combusted together with the adsorbate is supplied to the combustion device. The porous material regeneration device according to any one of claims 1 to 6, wherein the porous material is activated carbon. The porous material regeneration device according to any one of claims 1 to 7, wherein the temperature at the time of regeneration of the porous material is the temperature at which the adsorbate adsorbed in the porous material starts to evaporate and decompose The temperature above the temperature of at least one of the above-mentioned porous substances is a temperature lower than the temperature at which decomposition of the porous material starts due to heating. The porous material regeneration device according to claim 8, wherein the temperature at which the adsorbate adsorbed in the porous material starts to evaporate and decompose, and the porous material starts due to heating The decomposition temperature is determined by thermogravimetric analysis of the porous material that has adsorbed the adsorbate, and measurement of the temperature at which the porous material that has adsorbed the adsorbate begins to lose weight. A water treatment device is a water treatment device provided with the porous material regeneration device according to any one of claims 1 to 9, wherein: The porous material tank filled with the porous material is used as an adsorption layer through which the water to be treated can flow, and the adsorbed material has been desorbed from the porous material.

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