Method for producing hydrogen sulfide and apparatus for producing hydrogen sulfide

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

Technical Field

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

Background Art

[0002] As a method for producing hydrogen sulfide, a method of reacting sulfur gas and hydrogen gas is known.

[0003] As a technique related to such a method for producing hydrogen sulfide, for example, the one described in Patent Document 1 can be cited. Patent Document 1 describes a method for producing hydrogen sulfide by passing gaseous hydrogen and sulfur through a reactor containing a catalyst. In this method, sulfur vapor containing hydrogen gas is prepared in advance, and then hydrogen gas is further added to the sulfur vapor containing hydrogen gas to adjust the molar ratio of sulfur atoms to hydrogen molecules to be 1 to 1.5, and a raw material gas thus adjusted is used. According to the invention described in Patent Document 1, it is described that a method for producing hydrogen sulfide with a low hydrogen gas content can be provided.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the conventional method for producing hydrogen sulfide, when the supply of sulfur vapor (sulfur gas) becomes excessive, a local sulfur excess state occurs in the reaction tank, which may reduce the reaction efficiency.

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

[0007] In other words, the present invention provides a method for producing hydrogen sulfide and an apparatus for producing hydrogen sulfide as described below.

[0008] [1] A method for producing hydrogen sulfide, which involves reacting sulfur gas and hydrogen gas in a reaction vessel to synthesize hydrogen sulfide, Step (A) involves supplying a mixed gas of sulfur gas and hydrogen gas to the reaction vessel, Step (B) of supplying hydrogen gas to the reaction vessel, (C) is a step in which sulfur gas and hydrogen gas are reacted to synthesize hydrogen sulfide, Includes, A method for producing hydrogen sulfide, comprising detecting the amount of sulfur in the reaction vessel and adjusting the amount of hydrogen gas supplied in step (B) based on the result. [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 one of the above [1] to [3], 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 contains activated alumina. [6] A method for producing hydrogen sulfide according to any one of the above [1] to [5], further comprising the step of heating sulfur in a molten sulfur tank to generate sulfur gas. [7] A method for producing hydrogen sulfide according to [6] above, wherein the amount of sulfur in the reaction vessel is excessive, the temperature in the molten sulfur tank is reduced. [8] A hydrogen sulfide production apparatus that produces hydrogen sulfide by reacting sulfur gas and hydrogen gas, A reaction vessel for reacting sulfur gas and 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 content detection unit for detecting the amount of sulfur in the reaction vessel, A supply adjustment unit that adjusts the amount of mixed gas supplied from the mixed gas supply unit and the amount of hydrogen gas supplied from the hydrogen gas supply unit, A hydrogen sulfide production apparatus that includes [a specific component]. [9] The hydrogen sulfide production apparatus 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 vessel 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] A hydrogen sulfide production apparatus according to any one of the above [8] to

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

[12] The hydrogen sulfide production apparatus according to

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

[13] A hydrogen sulfide production apparatus according to any one of the above [8] to

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

[14] A hydrogen sulfide production apparatus according to any one of the above [8] to

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

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

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

[16] A hydrogen sulfide production apparatus according to any one of the above [8] to

[15] , wherein the sulfur content detection unit detects the amount of sulfur using infrared light. [Effects of the Invention]

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

Brief Description of the Drawings

[0010] [Figure 1] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 2] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 3] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 4] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 5] It is a schematic diagram showing an example of the tip portion of a sulfur amount detection unit. [Figure 6] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 7] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 8] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 9] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 10] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention. [Figure 11] It is a schematic diagram showing an example of a hydrogen sulfide production apparatus according to the present invention.

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by common reference numerals, and the description will be omitted as appropriate. Also, in the drawings, each component schematically shows a shape, size, and arrangement relationship that can be understood by the present invention, and is different from the actual dimensions.

[0012] [Method for producing hydrogen sulfide] The hydrogen sulfide production method according to this embodiment is a method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction vessel, comprising the steps of: (A) supplying a mixed gas of sulfur gas and hydrogen gas to the reaction vessel; (B) supplying hydrogen gas to the reaction vessel; and (C) reacting sulfur gas and hydrogen gas to produce 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 result.

[0013] When a localized sulfur excess occurs in the reaction vessel, the sulfur liquefies or solidifies at the site of the excess, thereby inhibiting the reaction between sulfur gas and hydrogen gas and reducing the efficiency of hydrogen sulfide production. The hydrogen sulfide production method according to this embodiment can suppress the occurrence of a localized sulfur excess in the reaction vessel, thereby improving the reaction efficiency.

[0014] Figure 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 hydrogen sulfide production method according to this embodiment is a method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction vessel 101, and includes the steps of: (A) supplying a mixed gas of sulfur gas and hydrogen gas to the reaction vessel 101; (B) supplying hydrogen gas to the reaction vessel 101; and (C) reacting the sulfur gas and hydrogen gas to produce hydrogen sulfide, wherein the amount of sulfur in the reaction vessel 101 is detected and the amount of hydrogen gas supplied in step (B) is adjusted based on the result.

[0016] In 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 can be, for example, a pipe.

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

[0018] In step (C), the mixed gas supplied to the reaction vessel 101 and hydrogen gas react within the reaction vessel 101 to synthesize hydrogen sulfide. The reaction shown in equation (1) below is thought to be occurring in the reaction vessel 101. H2+S → H2S (1)

[0019] The generated hydrogen sulfide-containing gas 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 can be, for example, a pipe.

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

[0021] The reaction vessel 101 may be equipped with a stirring function. Examples of stirring functions include a rotary kiln type stirring function.

[0022] In the hydrogen sulfide production method according to this embodiment, it is preferable to increase the amount of hydrogen gas supplied 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 can further suppress the occurrence of a localized sulfur excess state in the reaction vessel.

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

[0024] Figure 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 hydrogen sulfide production reaction, a porous material 106 is preferably installed in the reaction vessel 101. This promotes the reaction between sulfur gas and hydrogen gas on the surface of the porous material 106, thereby further accelerating the synthesis of hydrogen sulfide.

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

[0027] From the viewpoint of promoting the generation of hydrogen sulfide, the pores of the porous material 106 are preferably supported with one or more metallic elements selected from the group consisting of silver, platinum, molybdenum, cobalt, nickel, iron, and vanadium.

[0028] The temperature at which hydrogen sulfide is generated, 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 hydrogen sulfide generation, and 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 degradation.

[0029] The heating apparatus in process (C) is not particularly limited, but for example, it consists of a heating means capable of heating the inside of the reaction vessel 101 and a temperature controller that adjusts the output of the heating means to maintain a constant temperature inside the reaction vessel 101. The heating means is not particularly limited, but any known heating means such as heating wires or lamp heating can be used as long as it can heat the inside of the reaction vessel 101.

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

[0031] The hydrogen sulfide production method according to this embodiment preferably further includes a step of heating sulfur 109 in a molten sulfur tank 108 to generate sulfur gas. This makes it easier to control the amount of sulfur gas supplied.

[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 mixes with the hydrogen gas supplied from the hydrogen gas supply unit 110, resulting in a mixed gas of sulfur and hydrogen. This mixed gas is then supplied to the reaction tank 101 from the mixed gas supply unit 102.

[0033] The temperature of the molten sulfur tank 108 is not particularly limited as long as it is a temperature at which sulfur vapor is generated, 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 even more preferably 300°C or higher. From the viewpoint of suppressing the formation of rubbery sulfur, for example, it is 440°C or lower, preferably 400°C or lower, more preferably 360°C or lower, even more preferably 340°C or lower, and even more preferably 320°C or lower.

[0034] In the hydrogen sulfide production method 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, and as a result, the occurrence of localized sulfur excess conditions in the reaction tank can be further suppressed.

[0035] [Hydrogen sulfide production equipment] The hydrogen sulfide production apparatus according to this embodiment is a hydrogen sulfide production apparatus that produces hydrogen sulfide by reacting sulfur gas and hydrogen gas, and includes a reaction tank for reacting sulfur gas and 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 hydrogen gas supplied from the hydrogen gas supply unit.

[0036] When a localized sulfur excess occurs in a reaction vessel, the sulfur liquefies or solidifies at the site of the excess, inhibiting the reaction between sulfur gas and hydrogen gas, and reducing the efficiency of hydrogen sulfide production. According to the hydrogen sulfide production apparatus of this embodiment, the amount of sulfur in the reaction vessel can be detected by the sulfur amount detection unit. Furthermore, the supply adjustment unit can adjust the supply amount of mixed gas and hydrogen gas according to the detected amount of sulfur. For example, if the detected amount of sulfur is excessive, the supply of hydrogen gas can be increased by operating the supply adjustment unit, thereby suppressing the occurrence of a localized sulfur excess state in the reaction vessel and improving reaction efficiency.

[0037] Figure 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 and hydrogen gas, and includes a reaction tank 101 for reacting sulfur gas and hydrogen gas, a mixed gas supply unit 102 for supplying a mixed gas of sulfur gas and hydrogen gas, a hydrogen gas supply unit 103 for supplying hydrogen gas, a sulfur amount detection unit 112 for detecting the amount of sulfur in the reaction tank 101, and a supply adjustment unit 113 for adjusting the amount of mixed gas supplied from the mixed gas supply unit 102 and the amount of hydrogen gas supplied from the hydrogen gas supply unit 103. Examples of the mixed gas supply unit 102 and the hydrogen gas supply unit 103 include pipes and the like.

[0039] According to 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 reaction vessel 101 react in reaction vessel 101 to produce hydrogen sulfide. The reaction shown in equation (1) below is thought to be occurring in reaction vessel 101. H2+S → H2S (1)

[0041] The generated hydrogen sulfide-containing gas 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 can be, for example, a pipe.

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

[0043] The reaction vessel 101 may be equipped with a stirring function. Examples of stirring functions include a rotary kiln type stirring function.

[0044] The sulfur content detection unit 112 detects the amount of sulfur in the reaction vessel 101. The sulfur content detection unit 112 is preferably installed in at least one of the following locations: inside the reaction vessel 101 or downstream of the reaction vessel 101. This allows for the detection of excess sulfur during or after the hydrogen sulfide production reaction. The sulfur content detection unit 112 can be, for example, a sensor capable of detecting the amount of sulfur.

[0045] The sulfur content detection unit 112 preferably detects the amount of sulfur using infrared light. Specifically, the amount of sulfur can be detected by infrared radiation using the following method. <Method> (1) Insert the quartz glass rod, which is the sulfur content detection unit 112, into the inside of the reaction vessel 101 from the top of the reaction vessel 101. (2) The following explanation will be given using Figure 5, a schematic diagram showing a magnified view of the tip of the quartz glass rod. When the hydrogen sulfide generation reaction is carried out with the quartz glass rod inserted, a droplet of sulfur 114 adheres to the tip of the quartz glass rod. (3) Infrared light 115 is shone onto the droplet 114 through a quartz glass rod. (4) Some of the infrared radiation 115 is absorbed by the droplet 114, and some is reflected. (5) The amount of reflected infrared radiation 115 is measured, and the amount of infrared radiation 115 absorbed by the droplet 114 is calculated from that value. (6) Since the amount of infrared radiation 115 absorbed is proportional to the thickness of the droplet 114, the thickness of the droplet 114 is calculated from the amount of infrared radiation 115 absorbed. (7) The sulfur excess state is detected from the thickness of droplet 114.

[0046] Examples of the supply adjustment unit 113 include valves and the like.

[0047] The supply amounts of the mixed gas and hydrogen gas can be adjusted using 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 the hydrogen gas, and can further suppress the occurrence of localized sulfur excess conditions in the reaction vessel. The method for increasing the supply amount of hydrogen gas is not particularly limited, but 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 mixed gas.

[0049] In this embodiment of the hydrogen sulfide production apparatus, it is preferable to maintain a constant internal pressure in the reaction vessel by adjusting the supply amount of mixed gas and hydrogen gas. This makes it possible to suppress changes in reaction conditions due to changes in the internal pressure in the reaction vessel 101.

[0050] Figure 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] Preferably, a porous material 106 is installed in the reaction vessel 101. When the porous material 106 is installed 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, thereby further accelerating the synthesis of hydrogen sulfide.

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

[0053] From the viewpoint of promoting the generation of hydrogen sulfide, the pores of the porous material 106 are preferably supported with one or more metallic elements selected from the group consisting of silver, platinum, molybdenum, cobalt, nickel, iron, and vanadium.

[0054] The temperature at which hydrogen sulfide is generated 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 hydrogen sulfide generation, and 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 degradation.

[0055] The heating apparatus for generating hydrogen sulfide is not particularly limited, but for example, it consists of a heating means capable of heating the inside of the reaction vessel 101 and a temperature regulator that adjusts the output of the heating means to maintain a constant temperature inside the reaction vessel 101. The heating means is not particularly limited, but any known heating means such as heating wires or lamp heating can be used as long as it can heat the inside of the reaction vessel 101.

[0056] Preferably, the mixed gas and hydrogen gas are supplied from below the portion of the reaction vessel 101 that contains the porous material 106. As a result, the hydrogen gas, which is lighter than air, rises through the reaction vessel 101, creating an updraft. This updraft allows the sulfur gas and hydrogen gas to come into better contact with the porous material 106, further improving the reaction efficiency.

[0057] Figure 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 heating sulfur 109 to generate sulfur gas. This makes it easier to control the amount of sulfur gas supplied.

[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 mixes with the hydrogen gas supplied from the hydrogen gas supply unit 110 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 tank 108 is not particularly limited as long as it is a temperature at which sulfur vapor is generated, 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 even more preferably 300°C or higher. From the viewpoint of suppressing the formation of rubbery sulfur, for example, it is 440°C or lower, preferably 400°C or lower, more preferably 360°C or lower, even more preferably 340°C or lower, and even more preferably 320°C or lower.

[0061] Figure 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 collection unit 119 for collecting excess sulfur gas.

[0063] One method for collecting excess sulfur using the sulfur collection unit 119 is to cool the hydrogen sulfide-containing gas recovered from the hydrogen sulfide-containing gas recovery unit 104 in the sulfur collection unit 119, thereby liquefying or solidifying it.

[0064] It is also possible to detect the amount of sulfur in the reaction vessel 101 from the amount of sulfur collected in the sulfur collection unit 119. For example, the amount of sulfur in the reaction vessel 101 may be calculated from the weight of the sulfur collected in the sulfur collection unit 119. Alternatively, a glass window may be provided in the sulfur collection unit 119, and the amount of sulfur collected in the sulfur collection 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 there. The more sulfur there is in the reaction vessel 101, the more sulfur will be collected in the sulfur collection unit 119, which will increase the amount of sulfur adhering to the glass window, thereby decreasing the light transmittance of the glass window.

[0065] Figure 9 is a schematic diagram showing a hydrogen sulfide production apparatus 120, which is an example of a 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 mixed gas and 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 mixture of hydrogen gas and sulfur gas is obtained. The mixture gas is then 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, the hydrogen gas supplied from the hydrogen gas supply unit 121 is supplied to the reaction vessel 101 via the hydrogen gas supply unit 103. The hydrogen sulfide production apparatus 120 may include embodiments such as the hydrogen sulfide production apparatus 200 shown in the schematic diagram of Figure 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. Examples of the hydrogen gas supply adjustment unit 201 include 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 adjustment unit 201. In the hydrogen sulfide production apparatus 200, for example, the hydrogen gas supply adjustment unit 201 is provided between the point where the hydrogen gas supply unit 103 branches off from the hydrogen gas supply unit 121 and the sulfur melting tank 108. When the hydrogen gas supply adjustment unit 201 is open, 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 adjustment 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] Figure 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, it is preferable that, for example, the mixed gas supply unit 102 is located on the inside of the double-pipe structure, the end of the mixed gas supply unit 102 is located near the liquid surface of the sulfur 109, and hydrogen gas is supplied from the end of the mixed gas supply unit 102. Here, the mechanism by which the mixed gas supply unit 102 supplies the mixed gas to the reaction vessel 101 will be explained. First, the hydrogen gas supplied from the 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 sulfur gas are mixed, and a mixed gas is obtained. Then, the mixed gas obtained in this way is supplied to the reaction vessel 101. In other words, although hydrogen gas is supplied from the tip of the mixed gas supply unit 102, the hydrogen gas supplied from the end of the mixed gas supply unit 102 stirs up the sulfur gas, and as a result, a mixed gas is supplied to the reaction vessel 101.

[0073] In the hydrogen sulfide production apparatus according to this embodiment, it is preferable, for example, to make the mixed gas supply unit 102 movable in the vertical direction. 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 churn up the sulfur gas more efficiently.

[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 outer side of the double-pipe structure, the 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 up the reaction vessel 101 without stirring up the sulfur gas. In this way, hydrogen gas is supplied from the hydrogen gas supply unit 103 to the reaction vessel 101.

[0075] This application claims priority based on Japanese Patent Application No. 2023-001324, filed on January 6, 2023, and incorporates all of its disclosures herein. [Explanation of Symbols]

[0076] 100 Hydrogen sulfide production equipment 101 Reaction Vessel 102 Mixed Gas Supply Unit 103 Hydrogen Gas Supply Unit 104 Hydrogen sulfide-containing gas recovery unit 105 Hydrogen sulfide production apparatus 106 Porous materials 107 Hydrogen sulfide production equipment 108 Molten sulfur tank 109 Sulfur 110 Hydrogen Gas Supply Unit 111 Hydrogen sulfide production equipment 112 Sulfur content detection unit 113 Supply adjustment section 114 Droplets 115 Infrared 116 Hydrogen sulfide production apparatus 117 Hydrogen sulfide production equipment 118 Hydrogen sulfide production apparatus 119 Sulfur collection section 120 Hydrogen sulfide production equipment 121 Hydrogen Gas Supply Unit 122 Hydrogen sulfide production apparatus 123 Sulfur supply section 200 Hydrogen sulfide production equipment 201 Hydrogen Gas Supply Coordination Department

Claims

1. A method for producing hydrogen sulfide, which involves reacting sulfur gas and hydrogen gas in a reaction vessel to synthesize hydrogen sulfide, Step (A) involves supplying a mixed gas of sulfur gas and hydrogen gas to the reaction vessel, Step (B) of supplying hydrogen gas to the reaction vessel, (C) is a step in which sulfur gas and hydrogen gas are reacted to synthesize hydrogen sulfide, Includes, A method for producing hydrogen sulfide, comprising detecting the amount of sulfur in the reaction vessel and adjusting the amount of hydrogen gas supplied in step (B) based on the result.

2. A method for producing hydrogen sulfide according to claim 1, 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 claim 1 or 2, 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. 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 contains activated alumina.

6. A method for producing hydrogen sulfide according to claim 1 or 2, further comprising the step of heating sulfur in a molten sulfur tank to generate sulfur gas.

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 and hydrogen gas, A reaction vessel for reacting sulfur gas and 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 content detection unit for detecting the amount of sulfur in the reaction vessel, A supply adjustment unit that adjusts the amount of mixed gas supplied from the mixed gas supply unit and the amount of hydrogen gas supplied from the hydrogen gas supply unit, A hydrogen sulfide production apparatus that includes [a specific component].

9. The hydrogen sulfide production 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 vessel is excessive.

10. The hydrogen sulfide production apparatus according to claim 8 or 9, 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 vessel.

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

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

14. The hydrogen sulfide production apparatus according to claim 8 or 9, further comprising a sulfur collection unit for collecting the excess sulfur gas.

15. The hydrogen sulfide production apparatus according to claim 8 or 9, wherein the sulfur content detection unit is installed in at least one of the reaction tank and the downstream side of the reaction tank.

16. The hydrogen sulfide production apparatus according to claim 8 or 9, wherein the sulfur content detection unit detects the amount of sulfur using infrared light.

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