JP2000218129A - Method and apparatus for suppressing greenhouse gas generation - Google Patents

Abstract

(57) [Problem] To provide a method and an apparatus for suppressing the generation of greenhouse gas, which can achieve the closed use of carbon dioxide gas, achieve effective utilization, and further decompose the greenhouse gas into harmless substances. SOLUTION: Useful resources 1 such as fossil fuels and combustible wastes are treated in a molten salt furnace 2 and carbon dioxide 3 generated during the treatment
Is subjected to methanol synthesis by a methanol synthesizer 4 or stored and stored in a storage device 5 for reuse 6.
The molten salt furnace 2 contains a carbonate mainly composed of sodium and a molten salt mainly composed of sodium oxide or sodium peroxide, and its operation temperature is controlled in the range of 400 to 1000 ° C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a system for separating carbon dioxide from other harmful gases and discharging only pure carbon dioxide, and a system for treating greenhouse gases generated from various places. The present invention relates to a method and an apparatus for suppressing greenhouse gas generation.

[0002]

2. Description of the Related Art Power generation furnaces, garbage incinerators, and facilities that generate greenhouse gases, such as methane fermentation, natural gas mining, nitrogen-containing organic matter combustion, and greenhouse gas generation, which recover steam and heat by burning fossil fuels. Decomposes, detoxifies and purifies greenhouse gases generated from products used, for example, refrigerants using refrigerants such as chlorofluorocarbon, cleaning agents, products containing insulating gas (SF ₆ ), etc. It is necessary to recover carbon dioxide.

Hitherto, the focus as a greenhouse gas has been focused on the recovery of carbon dioxide gas. For this reason, many technologies have been developed. Recently, carbon dioxide fixation on a global scale has been proposed, for example, by synthesizing methanol using carbon dioxide gas as a fuel or returning to the sea floor.

However, since the concentration of carbon dioxide itself is low, it is necessary to perform operations such as concentration or separation of NO _x and SO _x contained as impurities for reuse, and a large amount of energy is required. Need cost.

For greenhouse gases other than carbon dioxide, studies on treatment techniques have only recently begun, and effective decomposition and detoxification techniques have not been developed. Here, four types of greenhouse gases, methane (CH ₄ ), dinitrogen monoxide (N ₂ O), hydrofluorocarbons or perfluorocarbons, and sulfur hexafluoride (SF ₆ ), which are particularly affected, are taken up. I will.

[0006]

Therefore, the following problems remain regarding greenhouse gas treatment. (1) Development of technology for recycling high-purity carbon dioxide (2) Development of technology for effective decomposition and detoxification of greenhouse gases other than carbon dioxide The present invention has been made to solve the above problems. ,
Closed carbon dioxide gas can be achieved, high-purity gas can be supplied to the effective use process of carbon dioxide gas, and methane, nitrous oxide, hydrofluorocarbon, perfluorocarbons, and sulfur hexafluoride other than carbon dioxide gas An object of the present invention is to provide a method and an apparatus for suppressing generation of greenhouse gases that can be decomposed into harmless substances.

[0007]

According to a first aspect of the present invention, an oxidizing unit for producing an oxidizing agent for burning carbon and a burning unit for reacting and burning the oxidizing agent and the carbon are provided in the same container. Carbon dioxide generated when treating useful resources such as fossil fuels and combustible waste by a molten salt furnace equipped with a mechanism that shares the common molten salt phase with these gas phase parts. Can be recovered without mixing with other oxidizing gases, and only high-purity carbon dioxide gas is supplied for methanol synthesis, storage or reuse.

According to a second aspect of the present invention, the molten salt used in the molten salt furnace includes a carbonate mainly composed of sodium, a molten salt mainly composed of sodium oxide and sodium peroxide, and has an operating temperature of 400 to 400. It is characterized by temperature control in the range of 1000 ° C.

A third aspect of the present invention is directed to a methane, nitrous oxide,
Greenhouse gases generated from fluorocarbons, sulfur hexafluoride or halogen-based gases or their liquids, specific sources, sources, and facilities are treated with an alkaline molten salt containing sodium as a main component to decompose and detoxify all. It is characterized by doing.

The invention according to claim 4 is characterized in that the molten salt reactor contains an alkaline molten salt containing sodium hydroxide as a main component, and the operating temperature is controlled in the range of 400 to 800 ° C.

[0011] The invention according to claim 5 is a filter separator for filtering and separating insoluble components generated in the molten salt reactor in addition to the molten salt reactor when treating the greenhouse gas with the alkaline molten salt. A molten salt electrolytic regenerator for regenerating the molten salt in the filtrate filtered by the filtration separator is provided. This allows the molten salt to be regenerated by extracting or decomposing solids and ionic components that accumulate in the molten salt,
By recycling, greenhouse gases can be continuously processed.

According to a sixth aspect of the present invention, the molten salt reactor according to the fifth aspect of the present invention comprises a charging mechanism for charging waste such as gas, liquid, and solid, an oxidizing gas injection mechanism, and a stirring mechanism. The filter has a function of controlling the salt to a reaction temperature of 400 to 800 ° C., the filtration separator has a function of filtering and separating solids in the molten salt with a metal filter, and the molten salt electrolytic regenerator has a β-alumina Characterized in that it has a salt electrolysis regeneration function of recovering sodium hydroxide by electrolysis using.

According to a seventh aspect of the present invention, in the sixth aspect, the filtration separator and the molten salt electrolytic regenerator are housed in a single container. Thereby, the device size can be reduced.

An eighth aspect of the present invention provides a molten salt furnace for processing useful resources such as fossil fuels and combustible wastes, a methanol synthesizing apparatus for receiving carbon dioxide generated in the molten salt furnace, and a storage and storage device. A molten salt reactor that flows greenhouse gas and oxidizing gas, a filtration separator that filters insoluble components generated in this molten salt reactor, and a used molten salt in the filtrate of the filtration separator A molten salt electrolytic regenerator for
A carbon dioxide gas supply line for supplying carbon dioxide gas generated in the molten salt electrolysis regenerator to the methanol synthesizing apparatus and the storage and storage device; and a metal for supplying metal sodium generated in the molten salt electrolysis regenerator to the molten salt furnace. A sodium supply line and a sodium hydroxide supply line for supplying sodium hydroxide generated by the molten salt electrolytic regenerator to the molten salt reactor are provided.

According to the present invention, a system for generating only carbon dioxide and detoxifying other greenhouse gases by combining a molten salt furnace and a molten salt reactor is constituted, and the molten salt mainly containing sodium is formed. Can be recycled cyclically.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of Method) (Corresponding to Claim 1) A first embodiment of a method for suppressing greenhouse gas generation according to the present invention will be described with reference to FIG. That is, in FIG. 1, a useful resource 1 such as a fossil fuel which is a source of greenhouse gas is burned in a molten salt in a molten salt furnace 2. NO _x as a greenhouse gas when this, SO _x and other harmful gases are absorbed all such acid gases in the molten salt, can be recovered only carbon dioxide 3 of high purity. The carbon dioxide gas 3 can be reused 6 by using it in the methanol synthesizing apparatus 4 or by storing and storing it. Therefore, according to the present embodiment, it is possible to suppress the discharge of carbon dioxide into the environment by collecting only high-purity carbon dioxide without discharging it to the outside of the system.

(Second Embodiment of Method) (Corresponding to Claim 2) Next, a second embodiment of a method for suppressing greenhouse gas generation according to the present invention will be described with reference to FIG.

In FIG. 2, a molten salt 7 is accommodated in a molten salt furnace indicated by reference numeral 2, and an oxidizing section 8 and a combustion section 9 are formed in the molten salt furnace 2. A heat extraction unit 10 is provided in the combustion unit 9. The oxidizing gas 11 and the fuel 12 are charged into the molten salt furnace 2,
Carbon dioxide gas and steam 13 flow out. In addition, the code in FIG.
14 indicates an oxidizing agent (Na ₂ O ₂ ), and 15 indicates a reducing agent (Na ₂ O).

As the molten salt 7, a carbonate (typically, sodium carbonate and sodium chloride) is used. Oxidizing agent in oxidizing part 8
14 generates. Na ₂ O + 1 / 2O ₂ = Na ₂ O ₂

In the combustion section 9, this oxidizing agent is consumed and becomes a reducing agent. That is, the carbon content in the fuel 12 is oxidized, and a combustion reaction of 2Na ₂ O ₂ + C = CO ₂ + 2Na ₂ O + Q (heat generation) occurs.

In addition, a sulfate group contained in the raw material,
Nitrate groups and chlorine groups are converted into sodium sulfate, sodium nitrate, sodium chloride and the like in the molten salt and are not discharged into the gas. By circulating the molten salt, sodium oxide (Na ₂ O) is re-oxidized by blowing oxygen gas or air into the oxidizing section 8 and sodium peroxide (Na
₂ O ₂ ). In the oxidizing section 8, a reaction of 2Na ₂ O + O ₂ = 2Na ₂ O ₂ occurs. The operating temperature is controlled in the range of 400 to 1000 ° C., but outside this range, it is not preferable.

(Third Embodiment of Method) (Corresponding to Claims 3 and 4) Next, a third embodiment of the method for suppressing greenhouse gas generation according to the present invention will be described.
An embodiment will be described. Greenhouse gases include methane (C
H ₄ ), dinitrogen monoxide (N ₂ O), hydrofluorocarbons or perfluorocarbons, sulfur hexafluoride (SF ₆ ), halogen-based gas, or a liquid thereof. When these gases or liquids are reacted in a molten salt reactor containing an alkaline molten salt, as shown in Table 1, they can all be decomposed into inorganic compounds and rendered harmless by the following reactions.

The molten salt reactor contains an alkali molten salt containing sodium hydroxide as a main component, and is operated at a temperature of 400 to 800 ° C.
It is configured to control the temperature within the range. Outside the above operating temperature range is not preferred.

[0024]

[Table 1]

<Methane (CH ₄ )> CH ₄ + 2O ₂ → CO ₂ ↑ + H ₂ O ↑ Nitrous oxide (N ₂ O)> 2N ₂ O → 2N ₂ ↑ + O ₂ ↑ <Hydrofluorocarbons / perfluorocarbon Class> CH _m F _4-m + xO ₂ → CO ₂ ↑ + H ₂ O ↑ + HF ↑ HF + NaOH → NaF + H ₂ O ↑ 2NaF + CaCO ₃ → CaF ₂ + Na ₂ CO ₃ (1) <Sulfur hexafluoride (SF ₆ )> SF ₆ + 8NaOH → NaF + Na ₂ SO ₄ + H ₂ O ↑ 2NaF + CaCO ₃ → CaF ₂ + Na ₂ CO ₃ (2)

(First Embodiment of Apparatus) (Corresponding to Claim 5) A first embodiment of a greenhouse gas generation suppressing apparatus according to the present invention will be described with reference to FIG. When the greenhouse gas is continuously treated for a long time, calcium fluoride (CaF ₂ ) is generated from the fluorine compound and precipitated from the above reaction formulas (1) and (2). When other organic chlorine compounds are contained, sodium chloride (NaCl) is generated, and when the solubility exceeds the saturation solubility, a precipitation product is generated.

Therefore, it is necessary to separate from the molten salt by filtration. Since this filtration is performed at a temperature of about 500 ° C., the treatment is performed using a metal filter. For example, a filter such as a spring filter has been put into practical use,
It is possible to separate and remove solids.

The alkali component (NaO) in the molten salt
H) is used in the neutralization reaction as shown by the formulas (1) and (2), and sodium carbonate (Na ₂ CO ₃ ) is obtained by the following reaction.
become. For this reason, the composition ratio in the molten salt gradually changes,
The melting point increases. Therefore, in order to use the molten salt continuously, it is necessary to use the molten salt as a solvent while regenerating the molten salt.

For the above reasons, a continuous detoxification system for molten salt having a function of filtering and separating a solid content and decomposing a sodium carbonate (Na ₂ CO ₃ ) component is required. This will be described below. That is,
A molten salt reactor 17, a filtration separator 18, and a molten salt electrolytic regenerator 19 for inflowing and treating a greenhouse gas 16 are sequentially installed.

When the greenhouse gas 16 is treated in the molten salt reactor 17, a detoxified steam nitrogen gas 20 is generated. The inorganic waste 21 as a solid content is separated by the filtration separator 18 and discharged. The ionic components are sent to a molten salt electrolysis regenerator 19, where they are separated into sodium hydroxide 22, carbon dioxide gas 25, metallic sodium 24, and sodium chloride 23.

(Second Embodiment of Apparatus) (Corresponding to Claim 6) A second embodiment of a greenhouse gas generation suppressing apparatus according to the present invention will be described with reference to FIG.

FIG. 4 is a schematic longitudinal sectional view showing the configuration of the molten salt reactor 17, the filtration separator 18, and the molten salt electrolysis regenerator 19 shown in FIG. .

That is, the molten salt reactor 17 contains an alkaline molten salt containing sodium hydroxide as a main component, and controls the operating temperature within a range of 400 to 800 ° C. Equipped with a neutral gas inflow mechanism 28, a stirrer 29 and its motor 30 and a mesh plate 31, and a valve
It has a sediment outlet pipe 33 with 32.

A transfer pump 34 is provided on the lower side of the molten salt reactor 17.
And a transfer pipe 35 is connected to the discharge side of the transfer pump 34, and is connected to the filtration separator 18 via a valve 36.
A filter 37 is installed in the filtration separator 18, and a carbon dioxide gas inflow pipe 38 and a molten salt transfer line 39 are connected to the upper part.
The lower end of the filtration separator 18 is connected to a cooling separator 42 via a regenerated molten salt outlet pipe 40 and a valve 41. Cooling separator
The 42 is provided with a detoxifying solids discharge pipe 43 and a transfer pipe 44 for transferring the regenerated molten salt from the filtration separator 18 to the molten salt electrolytic regenerator 19 via a sodium carbonate storage unit 45.

The molten salt transfer line 39 is connected to a transfer line 47 connected to the molten salt reactor 17 via a valve 46 and to a transfer line 49 connected to a transfer pipe 44 of the cooling separator 42 via a valve 48. .

In the molten salt electrolytic regenerator 19, a β-alumina film 50 is provided at the center, an anode 51 and a cathode 52 are provided on both sides thereof, and a water supply line 53 and a hydrogen outflow line 54 are provided. I have. Further, a sodium hydroxide return line 55 for returning the sodium hydroxide 22 to the molten salt reactor 17 is connected to the molten salt electrolytic regenerator 19. In FIG. 4, reference numeral 56 denotes an additional salt introduction line, which is connected to the transfer line 47.

FIG. 4 shows an outline of the apparatus. The greenhouse gas 16 is blown into the molten salt 7 in the molten salt reactor 17 to be decomposed.
Harmless. The reaction formula is as described in Table 1 and the second embodiment. A stirrer 29 and an oxidizing gas inflow mechanism 28 are provided in the molten salt reactor 17 in order to perform the reaction quickly. In addition, a mesh plate 31 is arranged so that the sediment accumulated at the bottom is not suspended in the molten salt. The precipitate is discharged from the bottom of the molten salt reactor 17 via the valve 32.

When the operation is continuously performed for a long time, the molten salt 26 is sent to the filtration separator 18 by the transfer pump 34, where the solid content and the molten salt are separated by the filtration filter 37, and the molten salt is again supplied to the valve. Molten salt reactor 17 through transfer line 47 via 46
Return to Further, a part of the molten salt is sent to a molten salt electrolytic regenerator 19 through a transfer line 49 via a valve 48 to decompose sodium carbonate. The molten salt electrolytic regenerator 19 generates sodium hydroxide 22 by an electrolysis reaction,
Return to 17.

The function of the molten salt electrolytic regenerator 19 will be described using a reaction equation. By arranging the β-alumina film 50 between the anode 51 and the cathode 52, Na ₂ CO ₃ -2e ⁻ =
2Na ^{+ +} CO ₂ ↑ next, 2Na ++ 2e is the cathode ^-
= 2Na 2Na + 2H ₂ O = 2NaOH + H ₂で き, the NaOH can be recycled, and the component of the molten salt consumed can be supplemented.

The metallic sodium produced in the molten salt electrolytic regenerator 19 is reacted with carbon dioxide to prepare Na ₂ O to be used in the molten salt furnace 2 shown in FIGS. 1 and 2 as 4Na + CO ₂ = 2Na ₂ O + C. It is possible to Eventually, only CO ₂ is eventually emitted, and there is a process of recycling this almost pure CO ₂ as a resource.

(Third Embodiment of Apparatus) (Corresponding to Claim 7) A third embodiment of a greenhouse gas generation suppressing apparatus according to the present invention will be described with reference to FIG.

In this embodiment, the filtration separator 18 shown in FIG.
And the molten salt electrolytic regenerator 19 in a single vessel as shown in FIG.
Molten salt regenerating device 58 housed inside 57
Has been configured. In FIG. 5, the same parts as those in FIG. 4 are denoted by the same reference numerals, and the description of the overlapping parts will be omitted.

In FIG. 5, a large partition plate 59 is provided substantially at the center of a single container 57, and a filter 37 is provided on the left side of the large partition plate 59. A small partition plate 60 is provided below the filter 37. Is installed. Above the filtration filter 37, a storage tank 61 is installed via a molten salt transfer line 39.

A vacuum pump 62 is connected to the storage tank 61 to maintain the inside of the storage tank 61 at a reduced pressure. The regenerated molten salt 26 a in the storage tank 61 filtered by the filtration filter 37 flows into the molten salt electrolytic regenerator 19 formed on the right side of the large partition plate 59 through the transfer pipe 44.

The molten salt electrolytic regenerator 19 includes a β-alumina porous cylinder 63 and an anode 51 inserted in the porous cylinder 63.
And the cathode 52 disposed outside the porous tube 63. The upper end of the porous tube 63 is connected to the molten salt reactor 17. In FIG. 5, reference numeral 64 denotes a humidifier.

A molten salt regenerating apparatus characterized in that the filtration separator and the molten salt electrolytic regenerator are housed in a single container to reduce the size of the apparatus will be described. As shown in FIG.
The molten salt 26 from the molten salt reactor 17 is led through the transfer pipe 35 into the single vessel 57 of the molten salt regenerating device 58 to perform filtration and electrical regeneration. The left side in the figure is a filtration unit equipped with a filtration filter 37, and the regenerated molten salt 26a of the filtrate is stored in a storage tank 61 by a vacuum pump 62. The regenerated molten salt 26a is
It is supplied to the electrolysis part on the right side in the figure, carbon dioxide gas is generated on the anode 51 side, molten metal sodium is generated on the cathode 52 side, and recovered as liquid metal sodium 24 from the upper part of the molten salt, and this is humidified 64 Into the sodium hydroxide 22 and returned to the molten salt reactor 17, or supplied as it is to the molten salt furnace 2 as it is, and reacted with carbon dioxide to obtain a raw material of sodium oxide.

(Fourth Embodiment of Apparatus) (corresponding to claim 8) A fourth embodiment of a greenhouse gas generation suppressing apparatus according to the present invention will be described with reference to FIG.

This embodiment combines FIG. 1 and FIG. 3 to constitute a system for generating only carbon dioxide and detoxifying other greenhouse gases and circulating a molten salt containing sodium as a main component. It has been configured so that it can be reused.

In FIG. 6, the same parts as those in FIGS. 1, 3 and 4 are denoted by the same reference numerals, and the description of the overlapping parts will be omitted.
That is, the carbon dioxide gas 25 generated from the molten salt electrolytic regenerator 19
Is provided between the molten salt furnace 2 and the methanol synthesizing apparatus 4 and between the storage and storage 5 and a metal sodium 24 generated from the molten salt electrolytic regenerator 19 is provided.
Is supplied to the molten salt furnace 2.

In this embodiment, useful resources 1 such as fossil fuels are burned in a molten salt furnace 2, and the generated carbon dioxide gas is supplied to a methanol synthesizing unit 3, a storage and storage unit 4, and a reuse unit 5. Up to this point, the apparatus is the same as the first embodiment.

When this is combined with a process in which the source of the greenhouse gas 16 is treated by the molten salt reactor 17, the filtration separator 18, and the molten salt electrolytic regenerator 19, the harmless steam nitrogen gas is emitted from the molten salt reactor 17. Only 20 is generated, and inorganic waste 21 is discharged from the filtration separator 18 and sodium chloride 23 is discharged from the molten salt electrolytic regenerator 19, and both are harmless to the environment.

On the other hand, the molten salt electrolytic regenerator 19
Since 25 are generated, the methanol synthesizing unit 4 and the storage and storage 5
To be collected. Further, the sodium hydroxide 22 generated from the molten salt electrolytic regenerator 19 can be returned from the sodium hydroxide return line 55 to the molten salt reactor 17 for reuse.

The metallic sodium 24 can be supplied to the molten salt furnace 2 and used as a raw material for sodium oxide. By forming a closed cycle system as described above, a recycle closed system that does not emit greenhouse gases can be constructed.

[0054]

According to the present invention, the following effects can be obtained. (1) The molten salt decomposition method can deal with all forms of waste, but in particular, since greenhouse gases are a reaction between gas and liquid molten salt, the reaction proceeds rapidly and the processing speed is extremely high, so that processing equipment must be very large. Can be downsized.

Further, NO _x , SO _x, etc. are not generated in the exhaust gas, and there is no need to provide a system for neutralizing an acidic gas by a generally used scrubber, so that an extremely compact processing apparatus can be constructed. . As a result, an extremely clean recycling system containing no impurities in the exhaust gas can be configured.

(2) Table 1 shows typical types of greenhouse gases and reaction formulas in molten salts. Carbon dioxide is treated by the neutralization reaction of sodium hydroxide, which is an alkaline molten salt, but it is not advisable to use an alkaline molten salt for the treatment because the amount of generated carbon dioxide increases.

Rather, in this process, carbon dioxide gas of extremely high purity (containing neither NO _x nor SO _x ) is obtained, and it is effective to utilize the carbon dioxide gas as another energy source. Therefore, it is used for methanol synthesis and storage reuse without treatment with sodium hydroxide.

(3) Methane reacts with oxygen gas to form carbon dioxide gas, but is absorbed in the presence of an alkaline molten salt. Nitrous oxide is decomposed into nitrogen and oxygen gas. Hydrofluorocarbons and perfluorocarbons are decomposed by the oxidation reaction in the molten salt, and become stable calcium fluoride in the presence of calcium carbonate.

Since this is present in a suspended state as an undissolved component, it is separated from the molten salt by filtration. Sulfur hexafluoride can be converted to calcium fluoride in the alkaline molten salt in the same manner as hydrofluorocarbons and perfluorocarbons, so that the main greenhouse gas can be decomposed and made harmless.

(4) The closed carbon dioxide gas can be achieved, and high-purity carbon dioxide gas can be supplied to the effective use process of the carbon dioxide gas. In addition, methane other than carbon dioxide,
A system can be constructed in which nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride are decomposed into harmless substances in a molten salt reactor.

[Brief description of the drawings]

FIG. 1 is a system diagram for explaining a first embodiment of a method for suppressing greenhouse gas generation according to the present invention.

FIG. 2 is a schematic configuration diagram of a molten salt furnace in FIG.

FIG. 3 is a system diagram for explaining a fourth embodiment of a method for suppressing greenhouse gas generation according to the present invention.

FIG. 4 shows a first embodiment of a greenhouse gas generation suppressing device according to the present invention.
FIG. 1 is a device and piping system diagram partially showing a longitudinal section of the embodiment.

FIG. 5 is a longitudinal sectional view showing a second embodiment of the greenhouse gas generation suppressing apparatus according to the present invention in a partial system diagram.

FIG. 6 is a block diagram showing a flow of a third embodiment of the greenhouse gas generation suppressing device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Useful resources, 2 ... Molten salt furnace, 3 ... Carbon dioxide gas, 4 ... Methanol synthesis equipment, 5 ... Storage and storage, 6 ... Reuse, 7 ... Molten salt, 8 ... Oxidizing section, 9 ... Combustion section, 10 ... Heat extraction unit, 11 ...
Oxidizing gas, 12 ... fuel, 13 ... carbon dioxide and hydrogen, 14 ...
Oxidizing agent _{(Na 2 O 2), 15} ... reducing agent (Na ₂ O), 16 ...
Greenhouse gas, 17… Molten salt reactor, 18… Filtration separator, 19
… Molten salt electrolytic regenerator, 20… Steam nitrogen gas, 21… Inorganic waste, 22… Sodium hydroxide, 23… Sodium chloride, 24
... Metal sodium, 25 ... Carbon dioxide gas, 26 ... Alkaline molten salt, 27 ... Greenhouse gas inflow mechanism, 28 ... Oxidizing gas inflow mechanism, 29 ... Agitator, 30 ... Electric motor, 31 ... Mesh plate, 32 ... Valve, 33 ... Sediment outflow pipe, 34… Transfer pump, 35… Transfer pipe, 36… Valve, 37… Filtration filter, 38… Carbon dioxide inflow pipe,
39… Molten salt transfer line, 40… Recycled molten salt outlet pipe, 41…
Valve, 42: Cooling separator, 43: Detoxifying solids discharge pipe, 44: Transfer pipe, 45: Sodium carbonate storage unit, 46: Valve, 47: Transfer line, 48: Valve, 49: Transfer line, 50: β -Alumina membrane, 51… Anode, 52… Cathode, 53… Hydration line, 54
... hydrogen outflow line, 55 ... sodium hydroxide return line,
56 ... Additional salt supply line, 57 ... Single container, 58 ... Molten salt regenerating device, 59 ... Large partition plate, 60 ... Small partition plate, 61 ... Storage tank, 62 ... Vacuum pump, 63 ... Porous made of β-alumina Tube, 64
... humidifier, 65 ... carbon dioxide supply line, 66 ... metal sodium supply line.

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B09B 3/00 B09B 3/00 303K (72) Inventor Kenichi Nagayama 1-1-1, Shibaura, Minato-ku, Tokyo F-term in Toshiba Corporation Head Office (reference) 2E191 BA01 BA12 BC01 BD11 BD12 4D002 AA09 AA12 AA22 BA02 BA08 CA13 CA20 DA02 DA11 DA12 DA16 EA13 EA14 GA01 GB11 4D004 AA01 AB06 AB08 AC05 CA24 CB02 CC12 DA06

Claims (8)

[Claims] 1. Useful resources such as fossil fuels and combustible wastes are treated in a molten salt furnace, and the carbon dioxide gas generated during the treatment is synthesized or stored and then reused. A method for suppressing the generation of greenhouse gases. 2. The molten salt furnace contains a carbonate mainly composed of sodium and a molten salt mainly composed of sodium oxide or sodium peroxide, and has an operating temperature of 400 to 1000 ° C.
2. The method according to claim 1, wherein the temperature is controlled in the range of: 3. A greenhouse gas composed of methane, nitrous oxide, fluorocarbons, sulfur hexafluoride, or a halogen-based gas or a liquid thereof, is treated in a molten salt reactor to render the greenhouse gas harmless. A method for suppressing generation of greenhouse gas, characterized by comprising 4. The molten salt reactor contains an alkaline molten salt containing sodium hydroxide as a main component and operates at a temperature of 400.
A method for controlling the generation of greenhouse gases, which comprises controlling the temperature in the range of 800 to 800 ° C. 5. A molten salt reactor into which a greenhouse gas and an oxidizing gas flow, a filtration separator for filtering insoluble components generated in the molten salt reactor, and a melt in the filtrate of the filtration separator. An apparatus for suppressing greenhouse gas generation, comprising a molten salt electrolytic regenerator for regenerating salt. 6. The molten salt reactor includes a charging mechanism for charging waste such as gas, liquid, and solid, an oxidizing gas injection mechanism, and a stirring mechanism. The molten salt is supplied at a reaction temperature of 400 to 800 ° C. It has a function of controlling the temperature, the filtration separator has a function of filtering and separating the solid content in the molten salt with a metal filter, and the molten salt electrolytic regenerator has a function of hydroxylation by electrolysis using β-alumina. The greenhouse gas generation suppressing device according to claim 5, further comprising a salt electrolysis regeneration function for recovering sodium. 7. The greenhouse gas generation suppressing apparatus according to claim 6, wherein the filtration separator and the molten salt electrolysis regenerator are housed in a single container. 8. A molten salt furnace for processing useful resources such as fossil fuels and combustible wastes, a methanol synthesizing unit and a storage and storage unit for receiving carbon dioxide gas generated in the molten salt furnace, a greenhouse gas, and an oxidizer. Molten salt reactor into which the inert gas flows, a filtration separator for filtering insoluble components generated in the molten salt reactor, and a molten salt for regenerating spent molten salt in the filtrate of the filtration separator An electrolytic regenerator, and a carbon dioxide gas supply line for supplying carbon dioxide gas generated by the molten salt electrolytic regenerator to the methanol synthesizing unit and the storage and storage unit,
A metal sodium supply line for supplying metal sodium generated in the molten salt electrolytic regenerator to the molten salt furnace, and a sodium hydroxide supply line for supplying sodium hydroxide generated in the molten salt electrolytic regenerator to the molten salt reactor A greenhouse gas generation suppressing device comprising a line.