Method for producing hydrogen sulfide and hydrogen sulfide production device

Abstract

A method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction tank (101) to synthesize hydrogen sulfide, the method including: step (A) for supplying a gas mixture of sulfur gas with hydrogen gas to the reaction tank (101); step (B) for supplying hydrogen gas to the reaction tank (101); and step (C) for reacting the sulfur gas with the hydrogen gas to synthesize hydrogen sulfide. The amount of sulfur in the reaction tank (101) is detected and the amount of the hydrogen gas supplied in step (B) is adjusted according to the result.

Description

Hydrogen sulfide production method and hydrogen sulfide production device

[0001] The present invention relates to a method for producing hydrogen sulfide and an apparatus for producing hydrogen sulfide.

[0002] A known method for producing hydrogen sulfide is to react sulfur gas with hydrogen gas.

[0003] An example of a technology related to such a method for producing hydrogen sulfide is described in Patent Document 1. Patent Document 1 describes a method for producing hydrogen sulfide by passing gaseous hydrogen and sulfur through a reactor containing a catalyst, characterized in that sulfur vapor containing hydrogen gas is prepared in advance, and then hydrogen gas is added to the sulfur vapor containing hydrogen gas, thereby adjusting the molar ratio of sulfur atoms to hydrogen molecules to 1 to 1.5, to use a feed gas. Patent Document 1 also describes that the invention can provide a method for producing hydrogen sulfide with a low hydrogen gas content.

[0004] Japanese Patent Application Laid-Open No. 2003-321212

[0005] In conventional methods for producing hydrogen sulfide, if sulfur vapor (sulfur gas) is supplied in excess, a localized excess sulfur state may occur within the reaction vessel, which may result in a decrease in reaction efficiency.

[0006] The present invention has been made in view of the above circumstances, and provides a method and apparatus for producing hydrogen sulfide that improves reaction efficiency by suppressing the occurrence of a local excess sulfur state in a reaction tank.

[0007] That is, according to the present invention, there are provided a method for producing hydrogen sulfide and an apparatus for producing hydrogen sulfide as described below.

[0008] [1] A method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction vessel to synthesize hydrogen sulfide, comprising: step (A) of supplying a mixed gas of sulfur gas and hydrogen gas to the reaction vessel; step (B) of supplying hydrogen gas to the reaction vessel; and step (C) of reacting sulfur gas and hydrogen gas to synthesize hydrogen sulfide, wherein the amount of sulfur in the reaction vessel is detected and the amount of hydrogen gas supplied in step (B) is adjusted based on the detected amount. [2] A method for producing hydrogen sulfide according to [1] above, wherein the amount of hydrogen gas supplied in step (B) is increased when the amount of sulfur in the reaction vessel is excessive. [3] A method for producing hydrogen sulfide according to [1] or [2] above, wherein the internal pressure in the reaction vessel is kept constant by adjusting the amount of mixed gas supplied in step (A) and the amount of hydrogen gas supplied in step (B). [4] A method for producing hydrogen sulfide according to any of [1] to [3] above, wherein a porous material is installed in the reaction vessel. [5] The method for producing hydrogen sulfide according to [4] above, wherein the porous material comprises activated alumina. [6] The method for producing hydrogen sulfide according to any one of [1] to [5] above, further comprising a step of heating sulfur in a molten sulfur tank to generate sulfur gas. [7] The method for producing hydrogen sulfide according to [6] above, wherein the temperature in the molten sulfur tank is reduced when the amount of sulfur in the reaction tank is excessive. [8] An apparatus for producing hydrogen sulfide by reacting sulfur gas with hydrogen gas, comprising: a reaction tank for reacting sulfur gas with hydrogen gas; a mixed gas supply unit for supplying a mixed gas of sulfur gas and hydrogen gas; a hydrogen gas supply unit for supplying hydrogen gas; a sulfur amount detection unit for detecting the amount of sulfur in the reaction tank; and a supply adjustment unit for adjusting the amount of the mixed gas supplied from the mixed gas supply unit and the amount of the hydrogen gas supplied from the hydrogen gas supply unit. [9] The apparatus for producing hydrogen sulfide according to [8] above, wherein the amount of hydrogen gas supplied from the hydrogen gas supply unit is increased when the amount of sulfur in the reaction tank is excessive.

[10] The hydrogen sulfide production apparatus according to [8] or [9] above, wherein the internal pressure in the reaction vessel is kept constant by adjusting the supply amount of the mixed gas and the supply amount of the hydrogen gas.

[11] The hydrogen sulfide production apparatus according to any one of [8] to

[10] above, wherein a porous material is installed in the reaction vessel.

[12] The hydrogen sulfide production apparatus according to

[11] above, wherein the porous material comprises activated alumina.

[13] The hydrogen sulfide production apparatus according to any one of [8] to

[12] above, further comprising a molten sulfur vessel for heating sulfur to generate the sulfur gas.

[14] The hydrogen sulfide production apparatus according to any one of [8] to

[13] above, further comprising a sulfur collection unit for collecting excess sulfur gas.

[15] The hydrogen sulfide production apparatus according to any one of [8] to

[14] above, wherein the sulfur amount detection unit is installed in at least one of the reaction vessel and the downstream side of the reaction vessel.

[16] The hydrogen sulfide production apparatus according to any one of [8] to

[15] above, wherein the sulfur amount detection unit detects the amount of sulfur by infrared rays.

[0009] The present invention can provide a method and apparatus for producing hydrogen sulfide that can suppress an excess sulfur state in a reaction tank and improve reaction efficiency.

[0010] 1 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 2 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 3 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 4 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 5 is a schematic diagram showing an example of a tip portion of a sulfur amount detection unit. 6 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 7 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 8 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. 9 is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention.

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all drawings, similar components are designated by common reference numerals, and descriptions thereof will be omitted where appropriate. In addition, the shapes, sizes, and layouts of the components in the drawings are shown only in a simplified manner to enable understanding of the present invention, and are not to scale.

[0012] [Method for Producing Hydrogen Sulfide] The method for producing hydrogen sulfide according to this embodiment is a method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction tank to synthesize hydrogen sulfide, and includes the steps of: step (A) of supplying a mixed gas of sulfur gas and hydrogen gas to the reaction tank; step (B) of supplying hydrogen gas to the reaction tank; and step (C) of reacting sulfur gas with hydrogen gas to synthesize hydrogen sulfide, wherein the amount of sulfur in the reaction tank is detected, and the amount of hydrogen gas supplied in step (B) is adjusted based on the result of the detection.

[0013] If a localized excess sulfur state occurs in the reaction vessel, sulfur will liquefy or solidify at the location where the excess sulfur state occurs, thereby inhibiting the reaction between sulfur gas and hydrogen gas and reducing the efficiency of hydrogen sulfide production. According to the hydrogen sulfide production method of this embodiment, the occurrence of a localized excess sulfur state in the reaction vessel can be suppressed, thereby improving reaction efficiency.

[0014] FIG. 1 is a schematic diagram showing a hydrogen sulfide production apparatus 100, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0015] The method for producing hydrogen sulfide according to this embodiment is a method for producing hydrogen sulfide in which sulfur gas and hydrogen gas are reacted in a reaction tank 101 to synthesize hydrogen sulfide, and includes the steps of: step (A) of supplying a mixed gas of sulfur gas and hydrogen gas to the reaction tank 101; step (B) of supplying hydrogen gas to the reaction tank 101; and step (C) of reacting the sulfur gas with the hydrogen gas to synthesize hydrogen sulfide. The method detects the amount of sulfur in the reaction tank 101, and adjusts the amount of hydrogen gas supplied in step (B) based on the result of the detection.

[0016] In the step (A), for example, a mixed gas of hydrogen gas and sulfur gas is supplied to the reaction vessel 101 by a mixed gas supply unit 102. The mixed gas supply unit may be, for example, a pipe.

[0017] In the step (B), for example, hydrogen gas is supplied to the reaction vessel 101 by a hydrogen gas supply unit 103. The hydrogen gas supply unit may be, for example, a pipe.

[0018] In step (C), the mixed gas supplied to the reaction vessel 101 reacts with hydrogen gas in the reaction vessel 101 to synthesize hydrogen sulfide. It is believed that the reaction represented by the following formula (1) occurs in the reaction vessel 101: H ２ +S → H ２ S (1)

[0019] The produced gas containing hydrogen sulfide is recovered from the reaction vessel 101 by, for example, a hydrogen sulfide-containing gas recovery unit 104. The hydrogen sulfide-containing gas recovery unit may be, for example, a pipe.

[0020] The reaction vessel 101, the mixed gas supply unit 102, the hydrogen gas supply unit 103, and the hydrogen sulfide-containing gas recovery unit 104 each contain, for example, one or more materials selected from the group consisting of carbon, stainless steel, glass, alumina, aluminum, Inconel (registered trademark), and Hastelloy (registered trademark). From the viewpoints of strength and preventing the inclusion of metal impurities, the reaction vessel 101 preferably contains one or more materials selected from stainless steel and glass, more preferably contains glass, and even more preferably contains quartz glass.

[0021] The reaction vessel 101 may be provided with an agitation function, such as a rotary kiln type agitation function.

[0022] In the method for producing hydrogen sulfide according to this embodiment, it is preferable to increase the supply amount of hydrogen gas in step (B) when the amount of sulfur in the reaction vessel 101 is excessive. This promotes the reaction between the excess sulfur and the hydrogen gas, and makes it possible to further suppress the occurrence of a local excess sulfur state in the reaction vessel.

[0023] In the method for producing hydrogen sulfide according to this embodiment, it is preferable to maintain the internal pressure of the reaction vessel 101 constant by adjusting the amount of the mixed gas supplied in step (A) and the amount of hydrogen gas supplied in step (B). This makes it possible to suppress changes in the reaction conditions due to changes in the internal pressure of the reaction vessel 101.

[0024] FIG. 2 is a schematic diagram showing a hydrogen sulfide production apparatus 105, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0025] From the viewpoint of promoting the reaction for producing hydrogen sulfide, a porous material 106 is preferably installed in the reaction tank 101. This promotes the reaction between sulfur gas and hydrogen gas on the surface of the porous material 106, thereby further promoting the synthesis of hydrogen sulfide.

[0026] From the viewpoint of promoting the reaction for producing hydrogen sulfide, the porous material 106 contains one or more materials selected from the group consisting of activated carbon, zeolite, and activated alumina, and more preferably contains activated alumina.

[0027] In order to promote the production of hydrogen sulfide, the pores of the porous material 106 preferably support one or more metal elements selected from the group consisting of silver, platinum, molybdenum, cobalt, nickel, iron, and vanadium.

[0028] The temperature at which hydrogen sulfide is produced, i.e., the temperature in step (C), is preferably 300°C or higher, more preferably 330°C or higher, and even more preferably 360°C or higher, from the viewpoint of promoting the production of hydrogen sulfide, and is preferably 500°C or lower, more preferably 480°C or lower, and even more preferably 450°C or lower, from the viewpoint of suppressing side reactions and catalyst deterioration.

[0029] The heating device in step (C) is not particularly limited, but may be composed of, for example, a heating means capable of heating the inside of the reaction tank 101 and a temperature regulator capable of adjusting the output of the heating means to maintain a constant temperature inside the reaction tank 101. The heating means is not particularly limited, but any known heating means such as a heating wire or lamp heating may be used as long as it can heat the inside of the reaction tank 101.

[0030] FIG. 3 is a schematic diagram showing a hydrogen sulfide production apparatus which is an example of the hydrogen sulfide production apparatus 107 according to the present invention.

[0031] The method for producing hydrogen sulfide according to this embodiment preferably further includes a step of generating sulfur gas by heating sulfur 109 in the molten sulfur bath 108. This makes it easier to control the supply amount of sulfur gas.

[0032] When hydrogen is supplied to the molten sulfur tank 108 from the hydrogen gas supply unit 110, the sulfur gas generated in the molten sulfur tank 108 and the hydrogen gas supplied from the hydrogen gas supply unit 110 are mixed to obtain a mixed gas of sulfur gas and hydrogen gas. The mixed gas is supplied to the reaction tank 101 from the mixed gas supply unit 102.

[0033] The temperature of the molten sulfur bath 108 is not particularly limited as long as it is a temperature at which sulfur vapor is generated, and is, for example, 180°C or higher, preferably 220°C or higher, more preferably 260°C or higher, even more preferably 280°C or higher, and still more preferably 300°C or higher. From the viewpoint of suppressing the generation of rubber-like sulfur, the temperature is, for example, 440°C or lower, preferably 400°C or lower, more preferably 360°C or lower, even more preferably 340°C or lower, and still more preferably 320°C or lower.

[0034] In the method for producing hydrogen sulfide according to this embodiment, it is preferable to reduce the temperature in the molten sulfur tank 108 when the amount of sulfur in the reaction tank 101 is excessive. This reduces the amount of sulfur gas generated in the molten sulfur tank 108, thereby reducing the amount of sulfur gas supplied to the reaction tank 101. As a result, it is possible to further suppress the occurrence of a local excess sulfur state in the reaction tank.

[0035] [Hydrogen sulfide manufacturing apparatus] The hydrogen sulfide manufacturing apparatus according to this embodiment is a hydrogen sulfide manufacturing apparatus that manufactures hydrogen sulfide by reacting sulfur gas with hydrogen gas, and includes a reaction vessel for reacting sulfur gas with hydrogen gas, a mixed gas supply unit that supplies a mixed gas of sulfur gas and hydrogen gas, a hydrogen gas supply unit that supplies hydrogen gas, a sulfur amount detection unit that detects the amount of sulfur in the reaction vessel, and a supply adjustment unit that adjusts the amount of the mixed gas supplied from the mixed gas supply unit and the amount of the hydrogen gas supplied from the hydrogen gas supply unit.

[0036] If a localized excess sulfur state occurs in the reaction vessel, sulfur liquefies or solidifies at the location where the excess sulfur state occurs, thereby inhibiting the reaction between sulfur gas and hydrogen gas and reducing the efficiency of hydrogen sulfide production. In the hydrogen sulfide production apparatus according to this embodiment, the sulfur content detector can detect the amount of sulfur in the reaction vessel. Furthermore, the supply adjuster can adjust the supply amounts of the mixed gas and hydrogen gas according to the detected amount of sulfur. For example, if the detected amount of sulfur is excessive, the supply adjuster can increase the supply amount of hydrogen gas, thereby suppressing the occurrence of a localized excess sulfur state in the reaction vessel and improving the reaction efficiency.

[0037] FIG. 4 is a schematic diagram showing a hydrogen sulfide production apparatus 111, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0038] The hydrogen sulfide production apparatus 111 according to this embodiment is a hydrogen sulfide production apparatus that produces hydrogen sulfide by reacting sulfur gas with hydrogen gas, and includes a reaction vessel 101 for reacting sulfur gas with hydrogen gas, a mixed gas supply unit 102 that supplies a mixed gas of sulfur gas and hydrogen gas, a hydrogen gas supply unit 103 that supplies hydrogen gas, a sulfur amount detection unit 112 that detects the amount of sulfur in the reaction vessel 101, and a supply adjustment unit 113 that adjusts the amount of the mixed gas supplied from the mixed gas supply unit 102 and the amount of the hydrogen gas supplied from the hydrogen gas supply unit 103. Note that the mixed gas supply unit 102 and the hydrogen gas supply unit 103 may be, for example, pipes.

[0039] In the hydrogen sulfide production apparatus 111 , a mixed gas of hydrogen gas and sulfur gas is supplied to the reaction vessel 101 by the mixed gas supply unit 102 , and hydrogen gas is supplied to the reaction vessel 101 by the hydrogen gas supply unit 103 .

[0040] The mixed gas and hydrogen gas supplied to the reaction vessel 101 react in the reaction vessel 101 to produce hydrogen sulfide. It is believed that the reaction represented by the following formula (1) occurs in the reaction vessel 101: H ２ +S → H ２ S (1)

[0041] The produced gas containing hydrogen sulfide is recovered from the reaction vessel 101 by, for example, a hydrogen sulfide-containing gas recovery unit 104. The hydrogen sulfide-containing gas recovery unit 104 may be, for example, a pipe.

[0042] The reaction vessel 101, the mixed gas supply unit 102, the hydrogen gas supply unit 103, and the hydrogen sulfide-containing gas recovery unit 104 each contain, for example, one or more materials selected from the group consisting of carbon, stainless steel, glass, alumina, aluminum, Inconel (registered trademark), and Hastelloy (registered trademark). From the viewpoints of strength and preventing the inclusion of metal impurities, the reaction vessel 101 preferably contains one or more materials selected from stainless steel and glass, more preferably contains glass, and even more preferably contains quartz glass.

[0043] The reaction vessel 101 may be provided with an agitation function, such as a rotary kiln type agitation function.

[0044] The sulfur amount detection unit 112 detects the amount of sulfur in the reaction tank 101. The sulfur amount detection unit 112 is preferably installed in at least one of the reaction tank 101 and the downstream side of the reaction tank 101. This makes it possible to detect the amount of excess sulfur during or after the hydrogen sulfide production reaction. The sulfur amount detection unit 112 can be, for example, a sensor capable of detecting the amount of sulfur.

[0045] The sulfur amount detection unit 112 preferably detects the amount of sulfur by infrared rays. Specifically, the amount of sulfur can be detected by infrared rays by the following method. Method: (1) A quartz glass rod, which serves as the sulfur amount detection unit 112, is inserted into the reaction vessel 101 from the top thereof. (2) The following description will be given with reference to FIG. 5, which is a schematic diagram showing an enlarged view of the tip of the quartz glass rod. When the hydrogen sulfide production reaction is carried out with the quartz glass rod inserted, sulfur droplets 114 adhere to the tip of the quartz glass rod. (3) Infrared rays 115 are irradiated onto the droplets 114 through the quartz glass rod. (4) Part of the infrared rays 115 is absorbed by the droplets 114, and part is reflected. (5) The amount of reflected infrared rays 115 is measured, and the amount of infrared rays 115 absorbed by the droplets 114 is calculated from this value. (6) Since the amount of infrared rays 115 absorbed is proportional to the thickness of the droplets 114, the thickness of the droplets 114 is calculated from the amount of infrared rays 115 absorbed. (7) A sulfur excess state is detected from the thickness of the droplets 114.

[0046] The supply adjusting unit 113 may be, for example, a valve.

[0047] The supply amount of the mixed gas and the supply amount of hydrogen gas can be adjusted by the supply adjustment unit 113. In the hydrogen sulfide production apparatus 111, the supply adjustment unit 113 is provided in the mixed gas supply unit 102. When the supply adjustment unit 113 is opened, the supply amount of the mixed gas increases, and the supply amount of hydrogen gas decreases relatively. On the other hand, when the supply adjustment unit 113 is closed, the supply amount of the mixed gas decreases, and the supply amount of hydrogen gas increases relatively. In this way, the supply amount of hydrogen gas can be adjusted.

[0048] In the hydrogen sulfide production apparatus according to this embodiment, it is preferable to increase the supply amount of hydrogen gas when the amount of sulfur in the reaction vessel 101 is excessive. This promotes the reaction between the excess sulfur and hydrogen gas, and makes it possible to further suppress the occurrence of a local excess sulfur state in the reaction vessel. There are no particular limitations on the method for increasing the supply amount of hydrogen gas. For example, the supply amount of hydrogen gas can be relatively increased by closing the supply adjustment unit 113 provided in the mixed gas supply unit 102 to reduce the supply amount of the mixed gas.

[0049] In the hydrogen sulfide production apparatus according to this embodiment, it is preferable to maintain the internal pressure of the reaction vessel at a constant level by adjusting the supply amounts of the mixed gas and hydrogen gas, thereby suppressing changes in the reaction conditions due to changes in the internal pressure of the reaction vessel 101.

[0050] FIG. 6 is a schematic diagram showing a hydrogen sulfide production apparatus 116, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0051] The reaction vessel 101 is preferably provided with a porous material 106. When the porous material 106 is provided in the reaction vessel 101, sulfur gas and hydrogen gas react on the surface of the porous material 106 to produce hydrogen sulfide. This promotes the reaction between sulfur gas and hydrogen gas on the surface of the porous material 106, further promoting the synthesis of hydrogen sulfide.

[0052] From the viewpoint of promoting the reaction for producing hydrogen sulfide, the porous material 106 contains, for example, one or more materials selected from the group consisting of activated carbon, zeolite, and activated alumina, and preferably contains activated alumina.

[0053] In order to promote the production of hydrogen sulfide, the pores of the porous material 106 preferably support one or more metal elements selected from the group consisting of silver, platinum, molybdenum, cobalt, nickel, iron, and vanadium.

[0054] The temperature at which hydrogen sulfide is produced is preferably 300°C or higher, more preferably 330°C or higher, and even more preferably 360°C or higher, from the viewpoint of promoting the production of hydrogen sulfide, and is preferably 500°C or lower, more preferably 480°C or lower, and even more preferably 450°C or lower, from the viewpoint of suppressing side reactions and catalyst deterioration.

[0055] The heating device used when generating hydrogen sulfide is not particularly limited, but may be composed of, for example, a heating means capable of heating the inside of the reaction tank 101 and a temperature regulator capable of adjusting the output of the heating means to maintain a constant temperature inside the reaction tank 101. The heating means is not particularly limited, but any known heating means such as a heating wire or lamp heating may be used as long as it can heat the inside of the reaction tank 101.

[0056] The mixed gas and hydrogen gas are preferably supplied from a portion of the reaction vessel 101 below the portion housing the porous material 106. As a result, hydrogen gas, which is lighter than air, rises in the reaction vessel 101, generating an updraft in the reaction vessel 101. This updraft allows the sulfur gas and hydrogen gas to come into good contact with the porous material 106, further improving the reaction efficiency.

[0057] FIG. 7 is a schematic diagram showing a hydrogen sulfide production apparatus 117, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0058] The hydrogen sulfide production apparatus according to this embodiment preferably further includes a molten sulfur tank 108 for generating sulfur gas by heating sulfur 109. This makes it easier to control the supply amount of sulfur gas.

[0059] When hydrogen is supplied to the molten sulfur tank 108 from the hydrogen gas supply unit 110, the sulfur gas generated in the molten sulfur tank 108 and the hydrogen gas supplied from the hydrogen gas supply unit 110 are mixed to obtain a mixed gas of sulfur gas and hydrogen gas. The obtained mixed gas is supplied to the reaction tank 101 from the mixed gas supply unit 102.

[0060] The temperature of the molten sulfur bath 108 is not particularly limited as long as it is a temperature at which sulfur vapor is generated, and is, for example, 180°C or higher, preferably 220°C or higher, more preferably 260°C or higher, even more preferably 280°C or higher, and still more preferably 300°C or higher. From the viewpoint of suppressing the generation of rubber-like sulfur, the temperature is, for example, 440°C or lower, preferably 400°C or lower, more preferably 360°C or lower, even more preferably 340°C or lower, and still more preferably 320°C or lower.

[0061] FIG. 8 is a schematic diagram showing a hydrogen sulfide production apparatus 118, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0062] The hydrogen sulfide production apparatus according to this embodiment preferably further includes a sulfur trapping section 119 for trapping excess sulfur gas.

[0063] As a method for capturing excess sulfur using the sulfur capture unit 119, for example, the hydrogen sulfide-containing gas recovered from the hydrogen sulfide-containing gas recovery unit 104 is cooled in the sulfur capture unit 119 and liquefied or solidified to capture the sulfur.

[0064] It is also possible to detect the amount of sulfur in the reaction vessel 101 from the amount of sulfur captured by the sulfur capture unit 119. For example, the amount of sulfur in the reaction vessel 101 may be calculated from the weight of the sulfur captured by the sulfur capture unit 119. Alternatively, a glass window may be provided in the sulfur capture unit 119, and the amount of sulfur captured by the sulfur capture unit 119 may be calculated from the light transmittance value of the glass window, and the amount of sulfur in the reaction vessel 101 may be calculated from the calculated amount. The greater the amount of sulfur in the reaction vessel 101, the greater the amount of sulfur captured by the sulfur capture unit 119, which in turn increases the amount of sulfur that adheres to the glass window, thereby reducing the light transmittance of the glass window.

[0065] FIG. 9 is a schematic diagram showing a hydrogen sulfide production apparatus 120, which is an example of the hydrogen sulfide production apparatus according to the present invention.

[0066] In the hydrogen sulfide production apparatus according to this embodiment, for example, the supply of the mixed gas and the hydrogen gas can be switched by opening and closing the supply adjustment unit 113 .

[0067] When the supply adjustment unit 113 is opened, hydrogen gas supplied from the hydrogen gas supply unit 121 is supplied to the molten sulfur tank 108, where a mixed gas of hydrogen gas and sulfur gas is obtained. The mixed gas is supplied to the reaction tank 101 from the mixed gas supply unit 102. On the other hand, when the supply adjustment unit 113 is closed, hydrogen gas supplied from the hydrogen gas supply unit 121 is supplied to the reaction tank 101 via the hydrogen gas supply unit 103. The hydrogen sulfide production apparatus 120 may include an embodiment such as a hydrogen sulfide production apparatus 200 as shown in the schematic diagram of FIG. 11. The hydrogen sulfide production apparatus 200 is an example of a hydrogen sulfide production apparatus according to the present invention. In the hydrogen sulfide production apparatus 200, for example, a hydrogen gas supply adjustment unit 201 is provided between the sulfur melting tank 108 and the hydrogen gas supply unit 121. The hydrogen gas supply adjustment unit 201 adjusts the amount of hydrogen gas supplied from the hydrogen gas supply unit 121. An example of the hydrogen gas supply adjustment unit 201 is a valve with a check valve. The amount of hydrogen gas supplied to the sulfur melting tank 108 can be adjusted by the hydrogen gas supply adjusting unit 201. In the hydrogen sulfide production apparatus 200, for example, the hydrogen gas supply adjusting unit 201 is provided between the sulfur melting tank 108 and the portion where the hydrogen gas supply unit 103 branches off from the hydrogen gas supply unit 121. When the hydrogen gas supply adjusting unit 201 is opened, hydrogen gas can be supplied from the hydrogen gas supply unit 121 into the sulfur melting tank 108. On the other hand, when the hydrogen gas supply adjusting unit 201 is closed, the supply of hydrogen gas from the hydrogen gas supply unit 121 into the sulfur melting tank 108 is stopped, and the backflow of sulfur gas from the sulfur melting tank 108 to the hydrogen gas supply unit 121 and the hydrogen gas supply unit 103 can be reduced.

[0068] FIG. 10 is a schematic diagram showing a hydrogen sulfide production apparatus 122, which is an example of a hydrogen sulfide production apparatus according to the present invention.

[0069] In the hydrogen sulfide production apparatus according to this embodiment, for example, sulfur 109 is heated in the lower part of the reaction vessel 101 to generate sulfur gas.

[0070] In the hydrogen sulfide production apparatus according to this embodiment, for example, a sulfur supply unit 123 is provided for supplying sulfur to the reaction tank 101, and if sulfur becomes insufficient during the hydrogen sulfide production reaction, sulfur is replenished from the sulfur supply unit 123.

[0071] In the hydrogen sulfide production apparatus according to this embodiment, for example, the mixed gas supply unit 102 and the hydrogen gas supply unit 103 form a double pipe structure.

[0072] In the hydrogen sulfide production apparatus according to this embodiment, for example, it is preferable that the mixed gas supply unit 102 is located on the inner side of the double-pipe structure, that the terminal end of the mixed gas supply unit 102 is located near the liquid surface of the sulfur 109, and that hydrogen gas is supplied from the terminal end of the mixed gas supply unit 102. Here, the mechanism by which the mixed gas is supplied to the reaction tank 101 by the mixed gas supply unit 102 will be described. First, the hydrogen gas supplied from the terminal end of the mixed gas supply unit 102 stirs up the sulfur gas generated near the liquid surface of the sulfur 109. As a result, the hydrogen gas and the sulfur gas are mixed, and a mixed gas is obtained. The mixed gas thus obtained is then supplied to the reaction tank 101. In other words, while hydrogen gas is supplied from the tip of the mixed gas supply unit 102, the hydrogen gas supplied from the terminal end of the mixed gas supply unit 102 stirs up the sulfur gas, resulting in the mixed gas being supplied to the reaction tank 101.

[0073] In the hydrogen sulfide production apparatus according to this embodiment, it is preferable to make the mixed gas supply unit 102 movable in the vertical direction, for example. This makes it possible to adjust the position of the end of the mixed gas supply unit 102 in accordance with fluctuations in the liquid level of sulfur 109. This makes it possible to more efficiently lift up the sulfur gas.

[0074] In the hydrogen sulfide production apparatus according to this embodiment, it is preferable that, for example, the hydrogen gas supply unit 103 is located on the outside of the double-pipe structure, the terminal end of the hydrogen gas supply unit 103 is located near the lower end of the porous material 106, and a sufficient distance is maintained between the lower end of the porous material 106 and the liquid surface of the sulfur 109. As a result, the hydrogen gas supplied from the hydrogen gas supply unit 103 rises in the reaction tank 101 without stirring up the sulfur gas. In this way, hydrogen gas is supplied from the hydrogen gas supply unit 103 to the reaction tank 101.

[0075] This application claims priority based on Japanese Patent Application No. 2023-001324, filed January 6, 2023, the disclosure of which is incorporated herein by reference in its entirety.

[0076] REFERENCE SIGNS LIST 100 Hydrogen sulfide production apparatus 101 Reaction tank 102 Mixed gas supply section 103 Hydrogen gas supply section 104 Hydrogen sulfide-containing gas recovery section 105 Hydrogen sulfide production apparatus 106 Porous material 107 Hydrogen sulfide production apparatus 108 Molten sulfur tank 109 Sulfur 110 Hydrogen gas supply section 111 Hydrogen sulfide production apparatus 112 Sulfur amount detection section 113 Supply adjustment section 114 Droplets 115 Infrared light 116 Hydrogen sulfide production apparatus 117 Hydrogen sulfide production apparatus 118 Hydrogen sulfide production apparatus 119 Sulfur collection section 120 Hydrogen sulfide production apparatus 121 Hydrogen gas supply section 122 Hydrogen sulfide production apparatus 123 Sulfur supply section 200 Hydrogen sulfide production apparatus 201 Hydrogen gas supply adjustment section

Claims

1. A method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction vessel to synthesize hydrogen sulfide, Step (A) of supplying a mixed gas of sulfur gas and hydrogen gas to the reaction vessel; (B) supplying hydrogen gas to the reaction vessel; (C) a step of reacting sulfur gas with hydrogen gas to synthesize hydrogen sulfide; Including, The method for producing hydrogen sulfide comprises detecting the amount of sulfur in the reaction tank and adjusting the amount of hydrogen gas supplied in step (B) based on the result of the detection.

2. 2. The method for producing hydrogen sulfide according to claim 1, wherein the supply amount of hydrogen gas in the step (B) is increased when the amount of sulfur in the reaction tank is excessive.

3. 3. The method for producing hydrogen sulfide according to claim 1, wherein the internal pressure in the reaction vessel is kept constant by adjusting the amount of the mixed gas supplied in the step (A) and the amount of hydrogen gas supplied in the step (B).

4. The method for producing hydrogen sulfide according to claim 1 or 2, wherein a porous material is installed in the reaction vessel.

5. The method for producing hydrogen sulfide according to claim 4, wherein the porous material comprises activated alumina.

6. 3. The method for producing hydrogen sulfide according to claim 1, further comprising the step of heating sulfur in a molten sulfur bath to produce sulfur gas.

7. 7. The method for producing hydrogen sulfide according to claim 6, wherein the temperature in the molten sulfur tank is reduced when the amount of sulfur in the reaction tank is excessive.

8. A hydrogen sulfide production apparatus that produces hydrogen sulfide by reacting sulfur gas with hydrogen gas, a reaction vessel for reacting sulfur gas with hydrogen gas; a mixed gas supply unit that supplies a mixed gas of sulfur gas and hydrogen gas; a hydrogen gas supply unit that supplies hydrogen gas; a sulfur amount detection unit that detects the amount of sulfur in the reaction tank; a supply adjusting unit that adjusts the supply amount of the mixed gas from the mixed gas supply unit and the supply amount of the hydrogen gas from the hydrogen gas supply unit; A hydrogen sulfide production apparatus comprising:

9. 9. The hydrogen sulfide manufacturing apparatus according to claim 8, wherein the amount of hydrogen gas supplied from the hydrogen gas supply unit is increased when the amount of sulfur in the reaction tank is excessive.

10. 10. The hydrogen sulfide manufacturing apparatus according to claim 8, wherein the internal pressure in the reaction vessel is kept constant by adjusting the supply amount of the mixed gas and the supply amount of the hydrogen gas.

11. The hydrogen sulfide production apparatus according to claim 8 or 9, wherein a porous material is installed in the reaction tank.

12. The hydrogen sulfide production apparatus according to claim 11 , wherein the porous material comprises activated alumina.

13. 10. The hydrogen sulfide manufacturing apparatus according to claim 8 or 9, further comprising a molten sulfur tank for heating sulfur to generate the sulfur gas.

14. 10. The hydrogen sulfide manufacturing apparatus according to claim 8, further comprising a sulfur trapping section that traps excess sulfur gas.

15. 10. The hydrogen sulfide manufacturing apparatus according to claim 8, wherein the sulfur amount detection unit is installed in at least one of the reaction tank and the downstream side of the reaction tank.

16. The hydrogen sulfide manufacturing apparatus according to claim 8 or 9, wherein the sulfur amount detection unit detects the amount of sulfur by infrared rays.