Device capable of improving efficiency of sulfur recovery catalyst

Abstract

The device comprises a hydrogen-rich gas pipeline and a fourth stop valve fixedly installed on the hydrogen-rich gas pipeline, the bottom of the hydrogen-rich gas pipeline fixedly communicates with a first pipeline, and a first cut-off assembly is fixedly installed in the middle of the first pipeline; according to the device capable of improving the sulfur recovery catalyst efficiency, a pipeline is additionally arranged on a traditional recovery pipeline and connected with a hydrogen-rich gas pipeline, the content of hydrogen entering an ultra-excellent Claus reactor is increased, and then the reaction efficiency of an ultra-excellent Claus catalyst is improved; the sulfur-containing tail gas is statically and uniformly mixed through the static gas mixing assembly, sulfide is converted into hydrogen sulfide gas as far as possible, the hydrogen sulfide gas is converted into liquid sulfur through the super Claus reactor, the content of the sulfide in the tail gas can be reduced, the sulfur-containing tail gas treatment device has the characteristics of simplicity and high efficiency, the emission of the sulfide is reduced, and the yield of the sulfur is also increased.

Description

Technical Field

[0001] The present application relates to the technical field of chemical sulfur recovery, and in particular to a device capable of improving the efficiency of a sulfur recovery catalyst. Background Art

[0002] At present, chemical sulfur recovery mainly adopts the super Claus sulfur recovery process. The hydrogen sulfide gas removed in the purification section is sent to the sulfur recovery section, and reacts through the Claus combustion reactor. The hydrogen sulfide gas after the reaction enters the primary and secondary Claus reactors for further catalysis to produce sulfur vapor. The sulfur vapor condenses and becomes liquid and is discharged into the sulfur pool. The remaining gas enters the super Claus reactor, is reduced to hydrogen sulfide gas through hydrogenation hydrolysis and reduction reaction, enters the super Claus reactor, and is directly oxidized to elemental sulfur. The design standard of the above sulfur recovery process is that the total sulfur recovery rate can reach 98%, but in actual operation, the following problems are found:

[0003] The sulfur recovery rate does not meet the standard, and the sulfur content in the exhaust gas exceeds the standard. Analysis shows that the hydrogen content in the gas entering the Super Claus reactor is insufficient, resulting in low catalytic efficiency of the hydrolysis and reduction reactions in the reactor, and the inability to completely convert organic sulfur and sulfur dioxide gas into H2S gas. Only part of the H2S gas enters the Super Claus to react and be reduced to elemental sulfur, while the sulfide in the exhaust gas enters the waste gas incinerator and is converted into SO2 and discharged into the atmosphere, resulting in the sulfur content in the exhaust gas exceeding the standard. Utility Model Content

[0004] The purpose of the present application is to provide a device for improving the efficiency of sulfur recovery catalysts, so as to solve the problem that the recovery efficiency of existing sulfur recovery catalysts is not up to standard as mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a device for improving the efficiency of sulfur recovery catalyst, comprising a hydrogen-rich gas pipeline and a fourth stop valve fixedly installed on the hydrogen-rich gas pipeline, the bottom of the hydrogen-rich gas pipeline is fixedly connected with pipeline one, the middle of the pipeline one is fixedly installed with a first shut-off assembly, the bottom end of the pipeline one is fixedly connected with a three-way pipe, one end of the three-way pipe is fixedly connected with pipeline two, the middle of the pipeline two is fixedly installed with a second stop valve, the other end of the three-way pipe is fixedly connected with pipeline three, the middle of the pipeline three is fixedly installed with a metering flow control assembly, one end of the pipeline three is fixedly connected with a static gas mixing assembly for gas mixing, the bottom end of the static gas mixing assembly is fixedly connected with an exhaust gas connecting pipe, and the top of one side of the static gas mixing assembly is fixedly connected with a mixed gas exhaust pipe.

[0006] In some embodiments, the first shut-off assembly includes a first stop valve and an eight-shaped blind plate fixedly installed at the water outlet of the first stop valve to facilitate flow control.

[0007] In some embodiments, the metering and flow control component includes a flow regulating valve and a flow meter fixedly installed at the water outlet of the flow regulating valve, and a third stop valve and a check valve are fixedly installed at the connection between the pipeline three and the static mixing component; the flow diversion is stable, safe and reliable.

[0008] In some embodiments, the static gas mixing assembly includes a static gas mixing cylinder and a threaded cylinder head fixedly arranged at the top of the static gas mixing cylinder, the top of the threaded cylinder head is threadedly connected with a sealing lock cap, and a gas mixing core column for gas turbulence mixing is fixedly installed in the middle of the inner wall of the sealing lock cap, and the exhaust gas connecting pipe and the mixed gas exhaust pipe are fixedly connected to the static gas mixing cylinder, so as to facilitate disassembly and maintenance.

[0009] In some embodiments, the gas mixing core column includes a plurality of arc-shaped spoilers, and a connecting column is fixedly arranged between two adjacent arc-shaped spoilers; the guide gas can be mixed to improve the uniformity of the mixing.

[0010] In some embodiments, a sealing ring is fixedly provided on the periphery of the inner wall of the sealing lock cap, and a pressure gauge is fixedly installed on one side of the top of the sealing lock cap; the sealing performance of the connection between the sealing lock cap and the static mixing cylinder can be improved, and the air pressure in the static mixing cylinder can be monitored at the same time.

[0011] In some embodiments, a connecting flange is fixedly installed at the bottom end of pipeline 2, which facilitates the connection of pipeline 2 to the sewage drainage pipeline.

[0012] Compared with the prior art, the beneficial effects of this application are:

[0013] The device adds a pipeline to the traditional recovery pipeline to connect the hydrogen-rich gas pipeline, thereby increasing the hydrogen content entering the Super Claus reactor, thereby improving the reaction efficiency of the Super Claus catalyst. Before entering the Super Claus reactor, the hydrogen-rich gas will be statically mixed with the sulfur-containing tail gas through a static gas mixing component to mix evenly. After converting sulfides into hydrogen sulfide gas as much as possible, it will be converted into liquid sulfur through the Super Claus reactor, which can reduce the sulfide content in the tail gas. It is simple and efficient, not only reducing sulfide emissions, but also increasing sulfur production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the overall structure of a device for improving the efficiency of a sulfur recovery catalyst provided in an embodiment of the present application;

[0017] Figure 2 A front cross-sectional view of a static gas mixing assembly provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of a gas mixing core column provided in an embodiment of the present application;

[0019] Figure 4 A front cross-sectional view of the sealing lock cap provided in an embodiment of the present application.

[0020] In the figure: 1. Hydrogen-rich gas pipeline; 2. Pipeline 1; 3. Pipeline 2; 4. Pipeline 3; 5. Static gas mixing cylinder; 6. First stop valve; 7. Eight-shaped blind plate; 8. Tee pipe; 9. Second stop valve; 10. Connecting flange; 11. Flow regulating valve; 12. Flow meter; 13. Third stop valve; 14. Check valve; 15. Exhaust gas connecting pipe; 16. Mixed gas exhaust pipe; 17. Threaded cylinder head; 18. Sealing lock cap; 19. Pressure gauge; 20. Sealing ring; 21. Gas mixing core column; 211. Arc-shaped spoiler; 212. Connecting column; 22. Fourth stop valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0023] The terms "first", "second", and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of this application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0026] See also Figure 1-4 , Figure 1 The overall structural diagram of the device for improving the efficiency of sulfur recovery catalyst provided in the embodiment of the present application is as follows: Figure 2 This is a front cross-sectional view of a static gas mixing assembly provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the structure of the gas mixing core column provided in the embodiment of the present application. Figure 4 A front cross-sectional view of the sealing lock cap provided in an embodiment of the present application.

[0027] The embodiment of the present application provides a device for improving the efficiency of sulfur recovery catalyst, including a hydrogen-rich gas pipeline 1 and a fourth stop valve 22 fixedly installed on the hydrogen-rich gas pipeline 1, the bottom of the hydrogen-rich gas pipeline 1 is fixedly connected with pipeline 1 2, the middle of pipeline 1 2 is fixedly installed with a first shut-off component, the bottom end of pipeline 1 2 is fixedly connected with a three-way pipe 8, one end of the three-way pipe 8 is fixedly connected with pipeline 2 3, the middle of pipeline 2 3 is fixedly installed with a second stop valve 9, the other end of the three-way pipe 8 is fixedly connected with pipeline 3 4, the middle of pipeline 3 4 is fixedly installed with a metering flow control component, one end of pipeline 3 4 is fixedly connected with a static gas mixing component for gas mixing, the bottom end of the static gas mixing component is fixedly connected with an exhaust gas pipe 15, the top of one side of the static gas mixing component is fixedly connected with a mixed gas exhaust pipe 16, and the bottom end of pipeline 2 3 is fixedly installed with a connecting flange 10;

[0028] When in use, pipeline 2 3 is a drainage pipeline and is installed with a second stop valve 9, which is used during pipeline nitrogen replacement. The addition of hydrogen-rich gas improves the sulfur conversion rate, reduces sulfide emissions, increases the hydrogen content of the inlet gas, and improves the reaction efficiency, thereby improving the sulfur recovery rate of the device as a whole, reducing the sulfide content discharged into the atmosphere, and is safe and environmentally friendly.

[0029] See also Figure 1 , further, the first interception assembly includes a first stop valve 6 and an eight-shaped blind plate 7 fixedly installed at the outlet of the first stop valve 6;

[0030] When in use, an eight-shaped blind plate 7 is installed on pipeline 1 2 to guide the blind when parking to prevent gas from mixing. The first stop valve 6 can control whether hydrogen enters pipeline 1 2.

[0031] See also Figure 1 , further, the metering flow control component includes a flow regulating valve 11 and a flow meter 12 fixedly installed at the outlet of the flow regulating valve 11, and a third stop valve 13 and a check valve 14 are fixedly installed at the connection between the pipeline 3 4 and the static gas mixing component;

[0032] When in use, the flow regulating valve 11 is used to control the flow of hydrogen, which is monitored by the flow meter 12 to improve the accuracy of flow control. The hydrogen enters the static mixing cylinder 5 through the check valve 14 and mixes with the reaction gas to prevent the reaction gas from pouring into the hydrogen-rich pipeline 1 when the hydrogen pressure is low, thereby improving the safety of use.

[0033] See also Figure 1 , Figure 2 , Figure 3 and Figure 4, further, the static gas mixing component includes a static gas mixing cylinder 5 and a threaded cylinder head 17 fixedly arranged at the top of the static gas mixing cylinder 5, the top of the threaded cylinder head 17 is threadedly connected with a sealing lock cap 18, a gas mixing core column 21 for gas turbulence mixing is fixedly installed in the middle of the inner wall of the sealing lock cap 18, the exhaust gas pipe 15 and the mixed gas exhaust pipe 16 are fixedly connected to the static gas mixing cylinder 5, the gas mixing core column 21 includes a plurality of arc-shaped spoilers 211, a connecting column 212 is fixedly arranged between two adjacent arc-shaped spoilers 211, a sealing ring 20 is fixedly arranged on the periphery of the inner wall of the sealing lock cap 18, and a barometer 19 is fixedly installed on one side of the top of the sealing lock cap 18;

[0034] When in use, hydrogen and sulfur-containing industrial mixed exhaust gas will enter the static mixing cylinder 5 from pipeline three 4 and exhaust gas connecting pipe 15 respectively. When the static mixing cylinder 5 rises, the two will be hindered by the arc-shaped spoiler 211, and mix while rising, which can improve the uniformity of the mixing of the two. The pressure gauge 19 is used to monitor the air pressure value in the static mixing cylinder 5. When the equipment stops running, the maintenance staff can remove the sealing lock cap 18 by screwing it, and extract the gas mixing core column 21 as a whole, which is convenient for later cleaning and maintenance.

[0035] When the embodiment of the present application is used: the sulfur-containing industrial mixed tail gas is directly connected to the tail gas pipe 15 through a pipeline, enters the static mixing cylinder 5 through the tail gas pipe 15, and the hydrogen enters the pipeline 1 2 through the hydrogen-rich pipeline 1, passes through the first stop valve 6 and the eight-shaped blind plate 7 in sequence, and enters the three-way pipe 8. Since the second stop valve 9 is in a normally closed state, the hydrogen will enter the pipeline 3 4, and after the flow rate is adjusted by the flow control valve 11, it enters the static mixing cylinder 5 through the third stop valve 13 and the check valve 14. At this time, the hydrogen and the sulfur-containing The industrial mixed tail gas containing hydrogen and sulfur rises along the static mixing cylinder 5, and the mixing turbulence of the arc-shaped spoiler 211 is used to achieve full mixing of hydrogen and the industrial mixed tail gas containing sulfur. The mixed gas passes through the mixed gas exhaust pipe 16 and enters the super-optimal Claus reactor through the pipeline for catalytic reaction. Through this technical solution, the problem of low efficiency in converting sulfide into hydrogen sulfide can be solved, the conversion rate of hydrogen sulfide is improved, thereby improving the sulfur recovery rate of the entire device, reducing the emission of sulfur dioxide, and providing a guarantee for the safe operation of the entire device.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for improving the efficiency of sulfur recovery catalyst, comprising a hydrogen-rich gas pipeline and a fourth stop valve fixedly installed on the hydrogen-rich gas pipeline, characterized in that: The bottom of the hydrogen-rich gas pipeline is fixedly connected to pipeline one, the middle of the pipeline one is fixedly installed with a first shut-off assembly, the bottom end of the pipeline one is fixedly connected to a tee, one end of the tee is fixedly connected to pipeline two, the middle of the pipeline two is fixedly installed with a second stop valve, the other end of the tee is fixedly connected to pipeline three, the middle of the pipeline three is fixedly installed with a metering flow control assembly, one end of the pipeline three is fixedly connected to a static gas mixing assembly for gas mixing, the bottom end of the static gas mixing assembly is fixedly connected to an exhaust gas connecting pipe, and the top of one side of the static gas mixing assembly is fixedly connected to a mixed gas exhaust pipe.

2. The device for improving the efficiency of sulfur recovery catalyst according to claim 1, characterized in that: The first intercepting assembly comprises a first stop valve and an eight-shaped blind plate fixedly installed at the water outlet of the first stop valve.

3. The device for improving the efficiency of sulfur recovery catalyst according to claim 1, characterized in that: The metering flow control component includes a flow regulating valve and a flow meter fixedly installed at the water outlet of the flow regulating valve, and a third stop valve and a check valve are fixedly installed at the connection between the pipeline three and the static gas mixing component.

4. The device for improving the efficiency of sulfur recovery catalyst according to claim 1, characterized in that: The static gas mixing assembly includes a static gas mixing cylinder and a threaded cylinder head fixedly arranged at the top end of the static gas mixing cylinder, the top end of the threaded cylinder head is threadedly connected with a sealing lock cap, the middle part of the inner wall of the sealing lock cap is fixedly installed with a gas mixing core column for gas turbulence mixing, and the exhaust gas connecting pipe and the mixed gas exhaust pipe are both fixedly connected to the static gas mixing cylinder.

5. The device for improving the efficiency of sulfur recovery catalyst according to claim 4, characterized in that: The gas mixing core column comprises a plurality of arc-shaped spoilers, and a connecting column is fixedly arranged between two adjacent arc-shaped spoilers.

6. The device for improving the efficiency of sulfur recovery catalyst according to claim 4, characterized in that: A sealing ring is fixedly arranged on the periphery of the inner wall of the sealing lock cap, and a pressure gauge is fixedly installed on one side of the top of the sealing lock cap.

7. The device for improving the efficiency of sulfur recovery catalyst according to claim 1, characterized in that: A connecting flange is fixedly installed at the bottom end of the pipeline 2.

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