JPH1142421A - Desulfurizer and electric power plant using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a miniaturized low cost desulfurizer free from the lowering of the temp. of a gas to be treated and to unnecessitate the circulation or the generation of a desulfurizing agent and to obtain an electric power plant using the same. SOLUTION: A desulfurizer is provided with a sulfide ion forming part 54 for forming a sulfide ion by the reaction with a sulfur compound, a sulfur compound supply part 52 for supplying a gas containing the sulfur compound to the sulfide ion forming part 54 and a sulfide compound discharge part 53 for discharging the sulfur compound produced by the reaction of the sulfide ion from the sulfide ion forming part 54. By this constitution, a sulfur portion in the gas supplied from the sulfur compound supply part 52 is concentrated and transferred to the gas passing through the sulfur compound discharge part 53 to be removed and to be efficiently recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a desulfurization apparatus for desulfurizing a crude gas containing sulfur, such as coal gasification gas, at a high temperature, and a power plant using the same.

[0002]

2. Description of the Related Art Among fossil fuels, coal is widely distributed in the world as compared with oil and natural gas, and has a large reserve, and is expected as a fuel for power generation in the future. As a power generation method using coal as fuel, pulverized coal-fired power for burning coal as pulverized coal is known.

However, from the viewpoint of thermal efficiency and environmental compatibility,
At present, gasification of coal, desulfurization of gasified coal,
The development of an integrated coal gasification combined cycle power plant that burns and sends the combustion gas to a gas turbine and a steam turbine to generate power is under way.

FIG. 6 is a block diagram of an integrated coal gasification combined cycle power plant using a desulfurizer. The integrated coal gasification combined cycle power plant 21 includes a coal gasification facility 22, a gas purification facility 41, and a combined cycle power generation facility 24. Further, the gas purification equipment 41 has a dry desulfurization device 1 and a dust removal device 23.
In FIG. 6, only the desulfurization tower 2 is shown in the dry desulfurization apparatus 1, but it has a regeneration tower, a reduction tower, a sulfur condenser, a circulation compressor, and a heater.

[0005] The coal gasification facility 22 mixes the pulverized coal 25 with a gasifying agent 26 (usually using oxygen),
Gasification furnaces 27a and 27b for gasification under predetermined conditions;
A gas cooler 28 for cooling the gasified gas 11 discharged from the gasification furnace 27b.

[0006] The gasified gas 11 discharged from the gas cooler 28 passes through the desulfurization tower 2 in the dry desulfurization unit 1 and then passes through a filter 29 provided in the dust removal unit 23, and is sent to the combined power generation facility 24. Supplied.

The gasified gas 11 is burned in a combustor 30 provided in the combined cycle power plant 24, and is supplied to a waste heat recovery boiler 33 through a gas turbine 31. The exhaust heat recovery boiler 33 is provided with a condenser 36 and a steam turbine 35.

The operation of the integrated coal gasification combined cycle power plant 21 having such a configuration will be described. The pulverized coal 25 and the gasifying agent 26 are mixed to form a high-temperature gasification furnace 27.
a. In the gasification furnace 27a, a reaction of generating carbon dioxide occurs mainly by an oxidation reaction of carbon. The inside of the gasification furnace 27b is under high pressure, and a reduction reaction occurs mainly by carbon dioxide and carbon, and carbon monoxide is generated. That is, the gasification furnaces 27a and 27b are operated under high temperature and high pressure (depending on the gasification method, but about 1400 [° C.]
At about 2 [MPa], the coal is gasified to produce a gasified gas 11. The components of the generated gasification gas 11 are carbon monoxide, hydrogen, carbon dioxide, water vapor, and the like.

The gasified gas 11 is cooled by a gas cooler 28 to an appropriate temperature (about 500 ° C.). The cooled gasified gas 11 is sent to the desulfurization tower 2 in the gas purification facility 41. In the desulfurization tower 2, H2 contained in the gasification gas 11
S is removed. Gasification gas 11 discharged from desulfurization tower 2
Then pass through the filter 29. Filter 29 is
When the gasification gas 11 passes, dust contained in the gasification gas 11 is removed. That is, the desulfurization tower 2 and the filter 2
In 9, the passing of the gasified gas 11 removes sulfur and fine particles that cause corrosion and wear of the gas turbine.

The clean gasified gas 11 from which sulfur and fine particles have been removed is supplied to the combined cycle power plant 24.
Clean gasified gas 1 purified by gas purification equipment 41
1 is burned in the combustor 30 and the combustion gas rotates the gas turbine 31 to generate power. The exhaust gas 32 discharged from the gas turbine 31 is sent to an exhaust heat recovery boiler 33. In the heat recovery steam generator 33, heat is taken from the exhaust gas 32 to generate steam 34, and the steam 34 rotates a steam turbine 35 to generate power. Steam turbine 35
Is discharged in a condenser 36, a part of the steam 34 is sent to a waste heat recovery boiler 33, and the rest is discharged from a gas cooler 2
8

The heat recovered from the gasified gas 11 by the gas cooler 28 is given to the condensed steam 34 sent from the condenser 36, and the steam 3 from the exhaust heat recovery boiler 33
4 and is sent to the steam turbine 35. Then steam 3
4 is again discharged from the steam turbine 35 and returns to the gas cooler 28 through the condenser 36.

When coal as a raw material of the integrated coal gasification combined cycle power plant 21 having such a structure is gasified, the sulfur content in the coal becomes mostly hydrogen sulfide and is mixed into the gasification gas 11. As a desulfurizer for removing hydrogen sulfide at a high temperature, a dry desulfurizer 1 using iron oxide as a desulfurizing agent is used. The dry desulfurization apparatus 1 operates to desulfurize the gasified gas 11 containing hydrogen sulfide generated in the gasification furnaces 27a and 27b at a high temperature without lowering the temperature as much as possible and supply the gas to the combined cycle power plant 24. I do. The dry desulfurization method is also excellent in terms of thermal efficiency.

Hereinafter, the configuration of the dry desulfurization apparatus 1 will be described with reference to FIG. FIG. 7 is a block diagram of a conventional dry desulfurization apparatus. The dry desulfurization apparatus 1 includes a desulfurization tower 2
, A regeneration tower 3, a reduction tower 37, a sulfur condenser 8, a circulating gas compressor 9, and a heater 10.

The gasification gas 11 flows in from one end of the desulfurization tower 2 (the lower part in the figure), and the desulfurizing agent 3 provided in the desulfurization tower 2 is used.
Contact 8 The chemical reaction between the gasification gas 11 and the desulfurizing agent 38 is represented by the following equation (1).

[0015]

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Thereafter, the gasified gas 1 from which the sulfur content has been removed
1 flows out from the other end (upper side in the figure) of the desulfurization tower 2. Desulfurizing agent 3 which has become a sulfide by absorbing sulfur in gasification gas 11
8 is sent to one end (upper side in the figure) of the regeneration tower 3. Air 39 is supplied from the other end (lower side in the figure) of the regeneration tower 3. In the regeneration tower 3, the sulfide and air undergo a chemical reaction represented by the following formula (2) to oxidize the sulfide. The sulfide can be regenerated by this oxidation reaction.

[0017]

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The regenerated desulfurizing agent 38 is sent to the desulfurization tower 2 again and reused. The movement of the desulfurizing agent 38 between the desulfurization tower 2 and the regeneration tower 3 is performed by airflow conveyance. Regeneration tower 3
In this case, the sulfur desorbed from the desulfurizing agent 38 is converted into sulfurous acid gas and sent to the reduction tower 37 as the regeneration tower outlet gas 14. The regeneration tower outlet gas 14 supplied from one end of the reduction tower 37 (lower in the figure) reacts with the anthracite 40 supplied from the other end of the reduction tower 37 (upper in the figure) by a chemical reaction represented by the following formula (3). Awaken.

[0019]

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The sulfur vapor generated by the chemical reaction is
It flows in from one end (upper side in the figure) of the sulfur condenser 8. The inflowing sulfur vapor is cooled in the sulfur condenser 8. The sulfur vapor condensed by the cooling is discharged outside the dry desulfurization device 1 as elemental sulfur 16.

The tail gas 17 flowing out from the other end (lower side in the figure) of the sulfur condenser 8 is sent to the circulating compressor 9 and is pressurized. The tail gas 17 discharged from the circulation compressor 9 is supplied to the heater 10 and is heated. A part of the heated tail gas 17 is mixed with the gasification gas 11 supplied to the desulfurization tower 2 and is sent to the desulfurization tower 2 while the rest is mixed with the regeneration air 39 and sent to the regeneration tower 3.

[0022]

However, the conventional desulfurization apparatus as described above and the power plant using the same have the following problems. Since the desulfurization reaction or the regeneration reaction in the desulfurization tower 2 or the regeneration tower 3 is a solid-gas reaction, the reaction rate is lower than that of a wet desulfurization apparatus. Further, the reaction rate of each chemical reaction is small. Therefore, the filling amount of the desulfurizing agent 38 in the desulfurization tower 2 and the regeneration tower 3 increases, and the desulfurization tower 2 and the regeneration tower 3 become larger than the wet desulfurization apparatus, and as a result, the cost increases.

Further, the amount of circulation of the desulfurizing agent 38 is increased, so that the power of the desulfurizing agent 38 in the airflow conveying equipment and in the office is increased. As a result, there has been a problem that the entire combined cycle power plant using the conventional dry desulfurization apparatus is increased in size and the power in the plant is increased.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and a small and inexpensive desulfurization apparatus which does not need to reduce the temperature of a gas to be treated and does not require circulation or regeneration of a desulfurizing agent. The purpose of the present invention is to provide a power plant that uses a power plant.

[0025]

In order to achieve the above object, a desulfurization apparatus according to the present invention comprises a sulfide ion generator for reacting with a sulfur compound to generate sulfide ions, and a sulfide ion generator. And a sulfur compound supply unit that supplies a sulfur compound to the sulfide ion generation unit, and a sulfur compound that is provided on the other of the sulfide ion generation unit and reacts with sulfide ions to generate a sulfur compound. And a sulfur compound discharge section that discharges from the sulfide ion generation section, and at the operating temperature of the sulfide ion generation section, reacts with sulfide ions in the sulfide ion generation section to form a sulfur compound that forms a gas phase. Flowing a fluid containing a component to be generated to the sulfur compound discharge portion.

Further, the desulfurization apparatus according to the present invention is provided in one of the sulfide ion generation section and the sulfide ion generation section which reacts with a sulfur compound to generate sulfide ion, and converts the sulfur compound into the sulfide ion. A sulfur compound supply unit to be supplied to the generation unit, and a sulfur compound supply unit provided in the other of the sulfide ion generation unit,
A sulfur compound discharge unit configured to discharge a sulfur compound generated by reacting with the sulfide ion from the sulfide ion generation unit, and through the sulfide ion generation unit, the sulfur compound supply unit; A plurality of compound discharge portions are alternately arranged, and a flow direction of the fluid in the sulfur compound supply portion is different from a flow direction of the fluid in the sulfur compound discharge portion.

Further, the power plant according to the present invention is provided with a hollow cylindrical sulfide ion generating section for generating sulfide ions by reacting with a sulfur compound, and inside or outside the cylinder of the sulfide ion generating section. A sulfur compound supply unit that supplies a sulfur compound to the sulfide ion generation unit, and a sulfur compound supply unit that is provided outside or inside the cylinder of the sulfide ion generation unit and reacts with a sulfide ion to produce a sulfur compound. And a plurality of the sulfide ion generators are provided, and a flow direction of a fluid flowing inside and outside the sulfide ion generator is different. Configuration is made.

[0028] The power plant according to the present invention is provided in one of the sulfide ion generation section that reacts with a sulfur compound to generate sulfide ions, and one of the sulfide ion generation section,
A sulfur compound supply unit that supplies a sulfur compound to the sulfide ion generation unit, and a sulfur compound that is provided on the other of the sulfide ion generation unit and reacts with a sulfide ion to generate a sulfur compound from the sulfide ion generation unit A sulfur compound discharge section to be discharged, and a plurality of the sulfur compound supply sections and the sulfur compound discharge sections are arranged alternately and adjacently via the sulfide ion generation section, and the sulfur compound supply section The flow direction of the fluid inside and the flow direction of the fluid in the sulfur compound discharge unit are different from each other, and include a desulfurization device and a power generation device that performs power generation using the fluid discharged from the sulfur compound supply unit. .

[0029]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a desulfurization device of the present invention, and FIG. 2 is a power generation system using the desulfurization device of the present invention.

The desulfurization unit 51 includes a flat sulfur-containing moving body 5.
4 (sulfide ion generation unit), a gas flow passage 52 (sulfur compound supply unit) is provided on one side, and a sulfur delivery gas flow passage 53 (sulfur compound discharge unit) is provided on the other.

The integrated coal gasification combined cycle power plant 61 (power generation system) using the desulfurization unit 51 mainly includes a coal gasification unit 22, a desulfurization unit 51, a dust removal unit 23, and a combined power generation unit 24 (power generation unit). Having.

In the coal gasification facility 22, the coal 25 is mixed with a gasifying agent (oxygen) 26 and supplied to a high-temperature gasification furnace 27a under high temperature and high pressure (depending on the gasification method, but the internal temperature is about 1400 ° C.). At an internal pressure of about 2 MPa).

The main components of the gasified gas 11 generated are carbon monoxide, hydrogen, carbon dioxide, water vapor, etc.
Less than hydrogen sulfide. The gasification gas 11 is cooled by a gas cooler 28 to an appropriate temperature (about 700 ° C.).

The cooled gasified gas 55 is supplied to the filter 6
After the solids are removed in 2, the solids are introduced into the gas flow passage 52 of the desulfurization device 51. The sulfur content moving body 54 of the desulfurization device 51 has a thickness of about 1.5 to 0.1 mm, preferably 0.1 to 0.1 mm.
It is a flat plate of 6 to 0.3 mm. Specifically, a porous body obtained by sintering a ceramic such as lithium aluminate,
It is impregnated with a molten carbonate as a sulfur-dissolving medium. As the carbonate, a mixture of an alkali metal carbonate such as Li, Na and K alone or a mixture thereof, or a mixture of an alkali metal carbonate and an alkaline earth carbonate such as Mg, Ca, Sr, or Ba. Is used. The addition of the alkaline earth improves the solubility of sulfide ions in the carbonate, but on the other hand increases the melting point of the carbonate, so that a ratio of usually about 10 to 30% is selected.

The carbonate is heated at a predetermined temperature (400 ° C. to 850 ° C.).
(Temperature range up to ° C), a large amount of carbonate ions CO32- is present in the liquid. Hydrogen sulfide H 2S in the gasification gas 55 flowing through the gas flow passage 52 to be treated dissolves in the molten carbonate, and then undergoes a chemical reaction represented by the following formula (4) with carbonate ions.

[0036]

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The sulfide ions generated by the chemical reaction of the formula (4) diffuse in the molten carbonate in the thickness direction of the sulfur moving body 54, and the sulfur content flowing through the sulfur carrying gas passage 53 on the back surface. It reaches the interface with the carry-out gas 56.

The sulfur discharge gas 56 is mainly composed of H 2 O and CO 2, and the flow of the sulfur discharge gas 56 is opposite to the flow of the gasification gas 55. Therefore, at the interface between the molten carbonate and the sulfur discharge gas 56, a chemical reaction expressed by the following equation (5) occurs, which reacts in the opposite direction to the equation (4).

[0039]

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The generated hydrogen sulfide (gas phase) is mixed in the sulfur-conveying gas 56. At this time, the sulfur discharge gas 5
If the product of the partial pressure of H 2 O and the partial pressure of CO 2 occupying in the gasification gas 6 is larger than the product of the partial pressure of H 2 O and the partial pressure of CO 2 occupying in the gasification gas 55, the chemical reaction of the formula (5) is performed. Is promoted.

The gasified gas 55 from which the sulfur content has been removed by the desulfurization device 51 is dedusted via the dedusting device 23 and supplied to the combined power generation facility 24. In the combined cycle power plant 24, the gasified gas 55 supplied to the combustor 30 is burned, and expanded while expanding in the gas turbine 31.
Rotate 1 to generate electricity.

The fuel is burned in the combustor 30 of the gas turbine 31,
The gasified gas 55 after power generation by the gas turbine 31 is discharged as the exhaust gas 32 from the gas turbine 31. A part of the exhaust gas 32 serves as a heat source for generating steam 34 by the exhaust heat recovery boiler 33, and the rest is supplied to the desulfurization device 51 as a sulfur-conveyed gas 56. The exhaust gas 32 heat recovered by the exhaust heat recovery boiler 33 is discharged to the outside. The steam 34 generated by heat exchange in the exhaust heat recovery boiler 33 is sent to a steam turbine 35 to generate power. Part of the steam 34 discharged from the steam turbine 35 is condensed in the condenser 36, supplied again to the exhaust heat recovery boiler 33, and the rest is supplied to the gas cooler 28.

The steam 34 generated from the heat recovered from the gasification gas 11 by the gas cooler 28 is
Sent to The sulfur content discharge gas 56 containing H2S thus concentrated is removed by a Claus reactor or a sulfur recovery device 63 having a lime-gypsum method, and released to the atmosphere as a clean gas 68 (tail gas). . The removed sulfur is recovered.

In the desulfurization apparatus as described above and the power plant using the same, the chemical reaction of the formula (4) is carried out on the side of the to-be-processed gas flow passage 52 of the sulfur content moving body 54 by the sulfur content moving body 5.
The chemical reaction of the formula (5) occurs on the side of the sulfur-conveying gas flow passage 53 of No. 4 respectively. Therefore, the hydrogen sulfide continuously moves from the gasification gas 55 flowing through the gas flow passage 52 to the sulfur-conveying gas 56, so that the gasification gas 55
The concentration of hydrogen sulfide in the sulfur delivery gas 56 is higher than the concentration of hydrogen sulfide therein, so that hydrogen sulfide can be efficiently concentrated.

As the sulfur-conveyed gas 56, the combustion exhaust gas 32 exiting the gas turbine 31 is used, and H 2 O and CO 2
2 are H 2 O and CO 2 of the gasification gas 55
And the partial pressure is higher. Therefore, the chemical reaction represented by the equation (5) occurs on the sulfur-conveying gas flow passage 53 side, and the reaction largely proceeds to the left. Therefore, the concentration of hydrogen sulfide in the sulfur delivery gas 56 is higher than the concentration of hydrogen sulfide in the gasification gas 55, and hydrogen sulfide can be efficiently concentrated.

If the difference between the temperature of the sulfur discharge gas 56 and the temperature of the gasification gas 55 is large, preferably if the temperature of the sulfur discharge gas 56 is lower than the temperature of the gasification gas 55, The chemical reaction is promoted, and the efficiency of sulfur recovery is improved.

Further, since the sulfur content moving body 54 is made of a porous body containing a molten carbonate, the carbonate is liquid at the operating temperature, and the moving speed of ions is higher than that in the case of a solid. The reaction efficiency is improved.

Further, the gasification gas 55 and the sulfur discharge gas 5
6 flows in opposite directions, and the concentration of hydrogen sulfide in the sulfur-containing carry-out gas 56 increases toward the downstream, and finally the sulfur content including high-concentration hydrogen sulfide is increased. The carry-out gas 56 can be obtained.

Next, the configuration and operation of the second embodiment of the present invention will be described with reference to FIG. In each of the following embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

The feature of the second embodiment is that a desulfurization unit 51 is constructed by stacking sulfur content moving bodies 54 and alternately inserting a gas flow passage 52 to be treated and a sulfur content carrying gas 53 therebetween. A feature is that a large amount of sulfur compounds can be recovered from the gasification gas 55.

FIG. 3 is a sectional view of a second embodiment of the desulfurizer according to the present invention. A gas flow passage 52 having a height of 1 mm to 2 mm and a gas flow passage 52 having a height of 1 m to 1 mm are provided via a sulfur-containing moving member 54 having a thickness of 1.5 to 0.1 mm, preferably 0.6 to 0.3 mm. The desulfurization device 51 is configured by alternately stacking several to several thousand layers of 2 m sulfur-containing discharge gas flow passages 53.

The gasified gas 55 and the sulfur-conveying gas 56 flow, for example, so as to face each other. In the second embodiment of the desulfurization apparatus as described above, a large amount of gasified gas 55 is produced by increasing the reaction area for generating sulfide ions from the sulfur compound supplied to the sulfur content moving body 54.
Is subjected to a desulfurization treatment to recover a sulfur compound. In addition, the desulfurization device 51 can be miniaturized by stacking the sulfur content moving bodies 54. When a large amount of gasified gas 55 is processed, low-cost desulfurization can be performed by using a plurality of unitized desulfurization devices 51.

Next, the configuration and operation of the third embodiment of the present invention will be described with reference to FIG. The features of the third embodiment are as follows.
The sulfur moving body 54 is arranged in a honeycomb shape and the desulfurization device 51
And that a large amount of sulfur compounds can be recovered from the gasification gas 55.

FIG. 4A is a front view of a third embodiment of the desulfurization apparatus according to the present invention, and FIG.
It is sectional drawing cut | disconnected by the A line. Internal cross section is 1mm on each side
A square or rectangular tubular sulfur-containing moving body 54 of about 4 mm is arranged in a honeycomb shape. Thickness 1.5mm ~
A partition having an opening 61 having an area smaller than the internal cross-sectional area of the cylindrical sulfur content moving body 54 at one longitudinal end of the sulfur content moving body 54 of 0.1 mm, preferably 0.6 mm to 0.3 mm. A plate 64 is provided. The gasified gas having passed through the sulfur content 54 is discharged from the other similar opening 61. The gasification gas 55 is supplied from the opening 61 to the sulfur-containing moving body 54.
And a recovery manifold 63 for recovering the sulfur-conveying gas 56 from the opening 61 are provided on the opening 61 side of the sulfur-moving body 54.

From the four openings 61 adjacent to the one opening 61 to which the gasified gas 55 is supplied, the sulfur-conveying gas 56 is discharged. The gasified gas 55 supplied from the supply manifold 62 reaches the tubular sulfur-containing moving body 54 from the opening 61. Sulfide ions are generated in the sulfur moving body 54, a sulfur compound is generated from the sulfide ions, and is discharged from the discharge manifold 63 through the opening 61 by the sulfur discharge gas 56.

In the above-described third embodiment of the desulfurization apparatus, the reaction area for generating sulfide ions from the sulfur compound supplied to the sulfur moving body 54 is increased, so that a large amount of the gasified gas 55 is produced. A desulfurization treatment can be performed, and a sulfur compound can be recovered. In addition, the desulfurization device 51 can be miniaturized by stacking the sulfur content moving bodies 54.

Next, the configuration and operation of the fourth embodiment of the present invention will be described with reference to FIG. The features of the fourth embodiment are as follows.
That is, the desulfurization device 51 is configured by disposing the sulfur content moving body 54 in a shell tube type. A large amount of sulfur compounds can be recovered from the gasification gas 55 with high efficiency.

FIG. 5 is a perspective view of a fourth embodiment of the desulfurization apparatus of the present invention. A plurality of hollow cylindrical sulfur moving bodies 54 are arranged. The hollow portion of the sulfur content moving body 54 is
The supply manifold 62 supplies the gasified gas 55 to the gas supply 4. Also, a plurality of inner diameters are about 1 mm to 10 mm, and the thickness is 1.5 mm to 0.1 mm, preferably 0.6 mm to 0.1 mm.
3 mm sulfur moving body 54 is housed inside, 1 c inside diameter
Hollow cylindrical recovery manifold 6 of about m to 100 cm
3 are provided. The recovery manifold 63 is for recovering the sulfur discharge gas 56 discharged from the sulfur transfer body 54.

[0059] A plurality of sulfur content moving bodies 54, a plurality of supply manifolds 62, and a recovery manifold 63 are arranged in a shell tube type. The gasification gas 55 supplied from the supply manifold 62 reaches the tubular sulfur-containing moving body 54. Sulfide ions are generated in the sulfur moving body 54. Sulfur compounds are produced by the produced sulfide ions. The generated sulfur compound is a sulfur-emitted gas 5
6 discharges from the collection manifold 63.

Here, the flow direction in the supply manifold 62 and the flow direction in the recovery manifold 63 are opposite to each other. Also, if the diameter of the supply manifold 62 is reduced, the average contact time between the gasified gas 55 and the sulfur content moving body 54 becomes longer, and the length of the sulfur content moving body 54 can be shortened.

When the desulfurization apparatus 51 having such a configuration is used in a power plant, the pressure in the supply manifold 62 is higher than the pressure in the recovery manifold 63. A manifold 63 is provided, and the supply manifold 62 is provided outside the sulfur content moving body 54.
Should be arranged. With such a configuration, even if the thickness of the sulfur content moving body 54 is small and the curvature is large, it can sufficiently withstand external pressure.

In the above-described fourth embodiment of the desulfurization apparatus, the reaction area for generating sulfide ions from the sulfur compound supplied to the sulfur content moving body 54 is increased, so that a large amount of the gasified gas 55 is produced. A desulfurization treatment can be performed. Therefore, the sulfur compound can be efficiently recovered. In addition, the desulfurization device 51 can be miniaturized by forming a shell tube type by arranging a plurality of sulfur content moving bodies 54. Also, the production can be facilitated. Further, this contributes to a reduction in the manufacturing cost of the desulfurization device 51.

The present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, without directly using the exhaust gas from the gas turbine as the sulfur discharge gas, the desulfurization device and the sulfur recovery device are used as a closed loop, and the gas from which the sulfur is removed by the sulfur recovery device is used as the sulfur discharge gas. May be.

[0064]

As described above, according to the present invention, the sulfur content can be efficiently concentrated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a desulfurization apparatus of the present invention.

FIG. 2 is a block diagram of a power plant using the desulfurization apparatus of the present invention.

FIG. 3 is a perspective view of a second embodiment of the desulfurization apparatus of the present invention.

FIG. 4 is a front view and a sectional view of a third embodiment of the desulfurization apparatus of the present invention.

FIG. 5 is a sectional view of a fourth embodiment of the desulfurization apparatus of the present invention.

FIG. 6 is a block diagram of a power plant using a conventional desulfurization device.

FIG. 7 is a block diagram of a conventional desulfurization device.

[Explanation of symbols]

 Reference Signs List 24 combined power generation equipment (power generation device) 51 desulfurization device 52 gas passage to be treated (sulfur compound supply unit) 53 sulfur discharge gas (sulfur compound discharge unit) 54 sulfur content moving body (sulfide ion generation unit) 61 coal gasification Combined cycle power plant (power generation system)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshi Ogawa 1 Toshiba-cho, Komukai Toshiba-cho, Saisaki-ku, Kawasaki-shi, Kanagawa

Claims (20)

[Claims] 1. A sulfide ion generator for reacting with a sulfur compound to generate sulfide ions, and a sulfur compound provided in one of the sulfide ion generators for supplying a sulfur compound to the sulfide ion generator. A supply unit and a sulfur compound discharge unit provided on the other of the sulfide ion generation unit and discharging a sulfur compound generated by reacting with sulfide ions from the sulfide ion generation unit; At the operating temperature of the ion generation unit, a fluid containing a component that generates a sulfur compound that becomes a gas phase by reacting with sulfide ions in the sulfide ion generation unit is passed through the sulfur compound discharge unit. Desulfurization equipment. 2. A sulfide ion generator for reacting with a sulfur compound to generate sulfide ions, and a sulfur compound provided in one of the sulfide ion generators for supplying a sulfur compound to the sulfide ion generator. A supply unit and a sulfur compound discharge unit provided on the other of the sulfide ion generation unit and discharging a sulfur compound generated by reacting with sulfide ions from the sulfide ion generation unit; Via an ion generation unit, the sulfur compound supply unit and the sulfur compound discharge unit are alternately arranged in a plurality, the flow direction of the fluid in the sulfur compound supply unit, and the flow direction of the fluid in the sulfur compound discharge unit. A desulfurization device characterized in that the flow direction is different. 3. The method according to claim 1, wherein at the operating temperature of the sulfide ion generating section, a fluid containing a component that reacts with sulfide ions in the sulfide ion generating section to generate a sulfur compound to be in a gas phase is discharged to the sulfur compound discharging section. 3. The desulfurization device according to claim 2, wherein the desulfurization device is circulated through a section. 4. A fluid flowing through the sulfur compound supply section,
The desulfurization apparatus according to claim 2, wherein the fluid flowing through the sulfur compound discharge section flows only through the sulfide ion generation section. 5. The desulfurization apparatus according to claim 2, wherein said sulfide ion generating section contains at least molten carbonate. 6. The desulfurization apparatus according to claim 2, wherein the sulfide ion generator is made of a porous material, and is impregnated with a molten carbonate. 7. The desulfurization apparatus according to claim 2, wherein the temperature of the fluid flowing through the sulfur compound supply section is lower than the temperature of the fluid flowing through the sulfur compound discharge section. 8. A hollow cylindrical sulfide ion generator for reacting with a sulfur compound to generate sulfide ions, and a sulfide ion generator provided inside or outside the cylinder of the sulfide ion generator. A sulfur compound supply unit for supplying to the ion generation unit, and a sulfur compound which is provided outside or inside the cylinder of the sulfide ion generation unit and which is generated by reacting with the sulfide ion, is discharged from the sulfide ion generation unit. A desulfurization apparatus, comprising: a sulfur compound discharge section; a plurality of the sulfide ion generation sections provided; and a flow direction of a fluid flowing inside and outside the sulfide ion generation section is different. 9. The method according to claim 9, wherein the fluid containing a component that reacts with sulfide ions in the sulfide ion generation unit to form a gaseous sulfur compound at the operating temperature of the sulfide ion generation unit is discharged to the sulfur compound discharge unit. 9. The desulfurization apparatus according to claim 8, wherein the desulfurization apparatus is circulated through a section. 10. The fluid flowing through the sulfur compound supply section and the fluid flowing through the sulfur compound discharge section flow only through the sulfide ion generation section. The desulfurization apparatus according to claim 1. 11. The desulfurization apparatus according to claim 8, wherein said sulfide ion generating section contains at least molten carbonate. 12. The desulfurization apparatus according to claim 8, wherein said sulfide ion generating section is made of a porous material, and has a molten carbonate impregnated therein. 13. The desulfurization apparatus according to claim 8, wherein the temperature of the fluid flowing through the sulfur compound supply section is lower than the temperature of the fluid flowing through the sulfur compound discharge section. 14. A sulfide ion generator for reacting with a sulfur compound to generate sulfide ions, and a sulfur compound provided in one of the sulfide ion generators for supplying a sulfur compound to the sulfide ion generator. A supply unit and a sulfur compound discharge unit provided on the other of the sulfide ion generation unit and discharging a sulfur compound generated by reacting with sulfide ions from the sulfide ion generation unit; A plurality of the sulfur compound supply units and the sulfur compound discharge units are alternately arranged adjacent to each other via an ion generation unit, and a flow direction of a fluid in the sulfur compound supply unit, A power plant comprising: a desulfurization device having a different flow direction of the fluid; and a power generation device that performs power generation using the fluid discharged from the sulfur compound supply unit. 15. Exhaust gas discharged from the power generation device,
The power plant according to claim 14, wherein the power is supplied to the sulfur compound discharge part. 16. The power plant according to claim 14, further comprising a coal gasifier for generating a fluid to be supplied to the sulfide ion generator. 17. The power plant according to claim 14, wherein said power generation device is a gas turbine or a steam turbine. 18. The power plant according to claim 14, further comprising a recovery section for recovering the fluid discharged from said sulfur compound discharge section. 19. The power plant according to claim 14, wherein the fluid supplied to the desulfurizer is supplied after flowing through a filter. 20. The power plant according to claim 14, further comprising a wet desulfurizer for recovering a sulfur compound from the fluid before being supplied to the power generator.