Screen discharge structure and coal gas fine desulfurization device

Abstract

The present application relates to coal gas desulfurization technical field, especially to a screen unloading structure and coal gas fine desulfurization device, the screen unloading structure is arranged at the bottom of the annular screen of vertical coal gas fine desulfulfurization tower, including a plurality of unloading holes distributed along the circumference of the annular screen, the unloading hole is funnel-shaped, and the size of the top opening of the unloading hole is greater than the size of the bottom opening of the unloading hole, and the two adjacent surfaces of adjacent two unloading holes are inverted V-shaped. By designing the unloading hole as funnel-shaped, the filler on the annular screen can quickly fall from the unloading hole under the action of gravity during unloading, and by designing the two adjacent surfaces of adjacent two unloading holes as inverted V-shaped, the dead angle area that is prone to filler accumulation between traditional unloading holes is cancelled, automatic unloading of all fillers can be realized, manual cleaning is not needed, and the possibility of contact with coal gas is reduced.

Description

Technical Field

[0001] This invention relates to the field of coal gas desulfurization technology, and in particular to a screen unloading structure and a coal gas fine desulfurization device. Background Technology

[0002] The majority of sulfur in blast furnace gas exists in the form of H2S, which is converted into SO2 after combustion, harming the human environment. Previously, the problem of excessive SO2 levels in blast furnace gas produced as a byproduct of steel production was addressed through end-of-pipe treatment, i.e., desulfurization of the flue gas. However, with adjustments to national industrial policies, SO2 emission requirements have significantly increased, rendering end-of-pipe treatment insufficient. This necessitates steel companies to achieve precise desulfurization of blast furnace gas at the source, making the degree of H2S removal from producer gas a crucial indicator.

[0003] The general approach to coal gas desulfurization is to install an absorbent packing layer in a vertical coal gas desulfurization tower. Coal gas flows through the packing layer, where the packing adsorbs sulfur-containing substances, achieving desulfurization. The vertical coal gas desulfurization tower is equipped with an annular screen to accommodate the packing layer. This annular screen, in a cylindrical shape, divides the vertical container into inner and outer rings. The coal gas first enters the desulfurization tower from the gas inlet to the outer ring of the packing layer, then passes through the packing layer to reach the inner ring (the central area of ​​the vertical container), and finally exits from the gas outlet. Figure 1 As shown, to facilitate unloading, four unloading holes 2 are usually set at the bottom of the annular screen 1. When replacing the packing 3, the packing 3 can be unloaded under gravity by opening the valve on the unloading pipe below the unloading hole 2.

[0004] However, the currently used annular screen has a horizontal area between adjacent discharge holes, which can easily create gaps and dead corners during discharge and cause packing to accumulate, making it impossible to fully unload automatically. This inevitably requires manual entry into the equipment for cleaning, which increases the possibility of contact with gas and poses a safety risk. Summary of the Invention

[0005] The purpose of this invention is to provide a screen unloading structure and a coal gas fine desulfurization device, which solves the problem that the annular screen in the vertical coal gas fine desulfurization tower in the prior art is prone to forming gap dead corners and causing packing accumulation during unloading.

[0006] To achieve the above objectives, the present invention provides a screen discharge structure, which is disposed at the bottom of an annular screen of a vertical coal gas desulfurization tower, including a plurality of discharge holes distributed circumferentially along the annular screen. The discharge holes are funnel-shaped, and the size of the top opening of the discharge hole is larger than the size of the bottom opening of the discharge hole. The two adjacent faces of two adjacent discharge holes are inverted V-shaped.

[0007] Optionally, the discharge port is formed by four sides.

[0008] Optionally, the minimum included angle between any side of the discharge hole and the horizontal plane is greater than the angle of repose of the packing.

[0009] Optionally, the minimum included angle between any side of the discharge hole and the horizontal plane is greater than 50° and less than 90°.

[0010] Optionally, there are 6 discharge holes, which are evenly distributed along the circumference of the annular screen.

[0011] Optionally, the screen unloading structure also includes multiple unloading pipes corresponding one-to-one with the multiple unloading holes. One end of each unloading pipe is located inside the vertical coal gas desulfurization tower and connected to the bottom opening of the corresponding unloading hole, while the other end extends outside the vertical coal gas desulfurization tower.

[0012] Optionally, the other ends of two adjacent discharge pipes are connected to a common discharge main pipe.

[0013] Optionally, a valve may be provided on the unloading main pipe.

[0014] Optionally, the valve is a pneumatic valve or an electric valve.

[0015] Based on this, the present invention also provides a coal gas fine desulfurization device, including a vertical coal gas fine desulfurization tower, an annular screen and a screen unloading structure as described above, wherein the annular screen is disposed inside the vertical coal gas fine desulfurization tower and the screen unloading structure is disposed at the bottom of the annular screen.

[0016] The screen unloading structure and coal gas desulfurization device provided by the present invention have at least one of the following beneficial effects:

[0017] 1) By designing the discharge hole as a funnel shape, the packing material on the annular screen can fall quickly from the discharge hole under the action of gravity during discharge. Furthermore, by designing the two adjacent surfaces of two adjacent discharge holes as an inverted V shape, the dead corner area that easily causes packing material to accumulate between traditional discharge holes is eliminated, enabling automatic discharge of all packing material without the need for manual cleaning, thereby reducing the possibility of contact with coal gas.

[0018] 2) By ensuring that the minimum angle between any side of the discharge hole and the horizontal plane is greater than the angle of repose of the packing, the packing can be made to slide quickly down the side of the discharge hole under the action of gravity during discharge.

[0019] 3) The other ends of two adjacent discharge pipes are connected to a main discharge pipe, that is, the filler in the two adjacent discharge pipes converges into a main discharge pipe, thereby simplifying the structure, reducing space occupation, and reducing costs.

[0020] 4) By converging the two discharge pipes in pairs, the two discharge pipes can share a single valve for control, reducing the use of valves. Furthermore, the valve is a pneumatic valve or an electric valve, which is more convenient to control than a traditional manual valve, and is conducive to the automatic discharge of packing material, saving manpower and resources. Attached Figure Description

[0021] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0022] Figure 1 This is a cross-sectional view of an annular screen in the prior art;

[0023] Figure 2 This is a three-dimensional schematic diagram of a screen unloading structure provided in an embodiment of the present invention;

[0024] Figure 3 This is a top view of a screen unloading structure provided in an embodiment of the present invention.

[0025] in:

[0026] 1- Annular screen; 2- Discharge hole; 3- Packing material;

[0027] 10 - Vertical coal gas desulfurization tower; 20 - Annular screen; 30 - Discharge hole; 31 - Side; 40 - Discharge pipe; 50 - Main discharge pipe. Detailed Implementation

[0028] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clarify the illustration of the embodiments of this invention, and are not intended to limit the conditions for implementing this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0029] It should also be understood that, unless otherwise specified or indicated, the terms "first," "second," "third," etc., in the specification are used only to distinguish the various components, elements, steps, etc., in the specification, and not to indicate the logical or sequential relationships between the various components, elements, steps, etc. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise limited, an element defined by the phrase "comprising one…" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0030] Please refer to Figures 2-3 This embodiment provides a screen discharge structure, which is set at the bottom of the annular screen 20 of the vertical coal gas desulfurization tower 10. It includes a plurality of discharge holes 30 distributed circumferentially along the annular screen 20. The discharge holes 30 are funnel-shaped, and the size of the top opening of the discharge hole 30 is larger than the size of the bottom opening of the discharge hole 30. The two adjacent faces of two adjacent discharge holes 30 are inverted V-shaped.

[0031] By designing the discharge hole 30 as a funnel, the packing material on the annular screen 20 can fall quickly from the discharge hole 30 under the action of gravity during discharge. Furthermore, by designing the two adjacent surfaces of two adjacent discharge holes 30 as an inverted V-shape, the dead corner area that easily causes packing material to accumulate between the traditional discharge holes 30 is eliminated, enabling automatic discharge of all packing material without the need for manual cleaning, thereby reducing the possibility of contact with gas.

[0032] In this embodiment, the discharge hole 30 is formed by four sides 31. Of course, the discharge hole 30 can also be formed by more sides 31 as needed, and this application does not limit this.

[0033] Preferably, the minimum angle between any side 31 of the discharge hole 30 and the horizontal plane is greater than the angle of repose of the packing. The angle of repose is the minimum angle between the inclined plane and the horizontal surface when the packing placed on it is in a critical state of sliding down the inclined plane. By ensuring that the minimum angle between any side 31 of the discharge hole 30 and the horizontal plane is greater than the angle of repose of the packing, it is easier for the packing to slide quickly down the side 31 of the discharge hole 30 under the action of gravity during discharge.

[0034] Furthermore, the angle between any side 31 of the discharge hole 30 and the horizontal plane is greater than 50° and less than 90°. Generally, the angle of repose of the packing is less than 40°. Therefore, by ensuring that the angle between any side 31 of the discharge hole 30 and the horizontal plane is greater than 50°, the automatic discharge of the packing can be guaranteed. At the same time, the angle between any side 31 of the discharge hole 30 and the horizontal plane is less than 90° to provide a certain discharge buffer and avoid blockage during the discharge process.

[0035] In this embodiment, there are 6 discharge holes 30, which are evenly distributed along the circumference of the annular screen 20. It should be understood that the number of discharge holes 30 can be greater than 6 or less than 6, and can be designed according to the size of the annular screen 20 and other requirements, as long as it can be ensured that there are no dead corner areas between two adjacent discharge holes 30 that are prone to packing accumulation.

[0036] Please continue to refer to Figure 2 The screen unloading structure also includes multiple unloading pipes 40 corresponding to multiple unloading holes 30. One end of the unloading pipe 40 is located inside the vertical coal gas desulfurization tower 10 and connected to the bottom opening of the corresponding unloading hole 30, while the other end extends outside the vertical coal gas desulfurization tower 10. During unloading, the packing material enters the unloading pipe 40 through the unloading hole 30 and is transported to the designated location via the unloading pipe 40. In this embodiment, a portion of the unloading pipe 40 is located inside the vertical coal gas desulfurization tower 10, and its length can be designed according to actual conditions. Furthermore, to ensure that the flow of coal gas within the vertical coal gas desulfurization tower 10 is not affected, there should be a certain distance between the bottom surface of the vertical coal gas desulfurization tower 10 and the unloading hole 30.

[0037] Preferably, the other ends of two adjacent discharge pipes 40 are connected to a single discharge main pipe 50. That is, the packing material inside two adjacent discharge pipes 40 converges into a single discharge main pipe 50, thereby simplifying the structure, reducing space occupation, facilitating the installation of the vent pipe, and also reducing costs. Of course, in addition to the discharge pipes 40 converging in pairs, more discharge pipes 40 can also converge; this application does not limit this, but it is necessary to ensure discharge efficiency and prevent problems such as blockage.

[0038] Preferably, a valve is provided on the main discharge pipe 50. By converging the discharge pipes 40 in pairs, the two discharge pipes 40 can share a single valve for control, reducing the number of valves used.

[0039] Furthermore, the valves are either pneumatic or electric. Using pneumatic or electric valves offers greater convenience compared to traditional manual valves, facilitating automatic packing unloading and saving manpower and resources.

[0040] Based on this, the present invention also provides a coal gas fine desulfurization device, including a vertical coal gas fine desulfurization tower, an annular screen and a screen unloading structure as described above, wherein the annular screen is disposed inside the vertical coal gas fine desulfurization tower and the screen unloading structure is disposed at the bottom of the annular screen.

[0041] In summary, the embodiments of the present invention provide a screen unloading structure and a coal gas fine desulfurization device. By designing the unloading hole 30 as a funnel shape, the packing material on the annular screen 20 can fall quickly from the unloading hole 30 under the action of gravity during unloading. Furthermore, by designing the two adjacent surfaces of two adjacent unloading holes 30 as an inverted V shape, the dead corner area that easily causes packing material accumulation between the traditional unloading holes 30 is eliminated, enabling automatic unloading of all packing material without the need for manual cleaning, thereby reducing the possibility of contact with coal gas.

[0042] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A screen unloading structure, disposed at the bottom of an annular screen in a vertical coal gas desulfurization tower, characterized in that, It includes multiple discharge holes distributed circumferentially along the annular screen. The discharge holes are funnel-shaped, and the size of the top opening of the discharge hole is larger than the size of the bottom opening of the discharge hole. The two adjacent faces of two adjacent discharge holes are inverted V-shaped.

2. The screen unloading structure according to claim 1, characterized in that, The discharge port is formed by four sides.

3. The screen unloading structure according to claim 2, characterized in that, The minimum angle between any side of the discharge hole and the horizontal plane is greater than the angle of repose of the packing.

4. The screen unloading structure according to claim 1 or 3, characterized in that, The minimum angle between any side of the discharge hole and the horizontal plane is greater than 50° and less than 90°.

5. The screen unloading structure according to claim 1, characterized in that, There are 6 discharge holes, which are evenly distributed along the circumference of the annular screen.

6. The screen unloading structure according to claim 1, characterized in that, The screen unloading structure also includes multiple unloading pipes corresponding to the multiple unloading holes. One end of each unloading pipe is located inside the vertical coal gas desulfurization tower and is connected to the bottom opening of the corresponding unloading hole, while the other end extends outside the vertical coal gas desulfurization tower.

7. The screen unloading structure according to claim 6, characterized in that, The other ends of the two adjacent unloading pipes are connected to a common unloading main pipe.

8. The screen unloading structure according to claim 7, characterized in that, The unloading main pipe is equipped with a valve.

9. The screen unloading structure according to claim 8, characterized in that, The valve is either a pneumatic valve or an electric valve.

10. A coal gas desulfurization device, characterized in that, The invention includes a vertical coal gas desulfurization tower, an annular screen, and a screen unloading structure according to any one of claims 1-9, wherein the annular screen is disposed inside the vertical coal gas desulfurization tower, and the screen unloading structure is disposed at the bottom of the annular screen.

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