阅读说明：本技术 干法脱硫装置及脱硫方法 (Dry desulfurization device and desulfurization method ) 是由 计维安 高晓根 戴万能 宋彬 张春阳 刘蔷 吴宇 赵婷 钟华 刘启聪 于 2020-03-30 设计创作，主要内容包括：本申请涉及一种干法脱硫装置及脱硫方法。属于天然气脱硫技术领域,该干法脱硫装置包括：脱硫塔、多层支撑栅板、惰性瓷球、丝网以及脱硫剂；多层支撑栅板位于脱硫塔内,且每层支撑栅板间隔设置；丝网包括第一丝网和第二丝网,每层支撑栅板上均铺设有第一丝网,惰性瓷球铺设在第一丝网上,第二丝网铺设在惰性瓷球上,脱硫剂放置在第二丝网上；支撑栅板网格的尺寸以及第一丝网网格的尺寸均小于惰性瓷球的尺寸；脱硫塔的塔顶部具有进气口和装料口,塔底部具有出气口,脱硫塔的外壁设置有多个卸料孔,一个卸料孔与一个支撑栅板相对应,且卸料孔位于支撑栅板之上。本申请脱硫剂利用效率更高；降低了底部脱硫剂的受力,减少了脱硫剂的粉化和板结。(The application relates to a dry desulfurization device and a desulfurization method. Belongs to the technical field of natural gas desulfurization, and the dry desulfurization device comprises: the desulfurization tower, the multilayer support grid plate, the inert ceramic ball, the silk screen and the desulfurizer; the multiple layers of support grid plates are positioned in the desulfurizing tower, and each layer of support grid plate is arranged at intervals; the silk screen comprises a first silk screen and a second silk screen, the first silk screen is paved on each layer of support grid plate, the inert ceramic balls are paved on the first silk screen, the second silk screen is paved on the inert ceramic balls, and the desulfurizer is placed on the second silk screen; the size of the grid of the support grid plate and the size of the grid of the first wire mesh are both smaller than the size of the inert ceramic ball; the top of the desulfurizing tower has an air inlet and a charging hole, the bottom of the desulfurizing tower has an air outlet, the outer wall of the desulfurizing tower is provided with a plurality of discharge holes, one discharge hole corresponds to one supporting grid plate, and the discharge hole is positioned on the supporting grid plate. The desulfurizer has higher utilization efficiency; the stress of the desulfurizer at the bottom is reduced, and the pulverization and hardening of the desulfurizer are reduced.)

1. A dry desulfurization apparatus, characterized in that it comprises: the device comprises a desulfurizing tower (1), a multi-layer supporting grid plate (2), inert ceramic balls (3), a wire mesh and a desulfurizing agent (4);

the multiple layers of support grid plates (2) are positioned in the desulfurizing tower (1), and each layer of support grid plate (2) is arranged at intervals;

the wire mesh comprises a first wire mesh and a second wire mesh, the first wire mesh is laid on each layer of support grid plate (2), the inert ceramic balls (3) are laid on the first wire mesh, the second wire mesh is laid on the inert ceramic balls (3), and the desulfurizer (4) is placed on the second wire mesh;

the size of the grid of the support grid plate (2) and the size of the grid of the first wire mesh are both smaller than the size of the inert ceramic ball (3);

the tower top of desulfurizing tower (1) has air inlet (101) and charging hole (102), and the bottom of the tower has gas outlet (103), the outer wall of desulfurizing tower (1) is provided with a plurality of discharge openings (104), one discharge opening (104) and one support grid tray (2) corresponding, just discharge opening (104) are located support grid tray (2) are last.

2. The dry desulphurization device according to claim 1, wherein the support grid (2) comprises: two first support grids (21), two second support grids (22), and a third support grid (23);

the third support grid plate (23) is positioned between the two second support grid plates (22), one first support grid plate (21) is connected with one second support grid plate (22), and the other first support grid plate (21) is connected with the other second support grid plate (22).

3. The dry desulfurization device according to claim 2, wherein the two first support grids (21), the two second support grids (22), and the third support grid (23) each have a width smaller than the diameter of the discharge hole (104).

4. The dry desulfurization apparatus according to claim 2, wherein the first support grid (21), the second support grid (22), and the third support grid (23) are sequentially increased in strength.

5. The dry desulfurization apparatus according to any one of claims 1 to 4, further comprising: the support piece (5), support piece (5) with the inner wall of desulfurizing tower (1) is connected, the base of support grid tray (2) with support piece (5) offset.

6. The dry desulphurization device according to any one of claims 1 to 4, wherein the device further comprises a blowdown line (6), the blowdown line (6) being connected to the bottom of the desulphurization tower (1).

7. The dry desulphurization device according to any one of claims 1 to 4, wherein the lower edge of the discharge opening (104) is at a distance of 200 and 500mm from the support grid.

8. The dry desulfurization device according to any one of claims 1 to 4, characterized in that the distance between the desulfurization agent (4) and the support grid (2) located above the desulfurization agent (4) is equal to or greater than 300 mm.

9. The dry desulphurization device according to any one of claims 1 to 4, wherein the device further comprises a wedge-shaped guide ring (7), wherein the wedge-shaped guide ring (7) is located on the first wire mesh and on the inner wall of the desulphurization tower (1).

10. A dry desulfurization method for desulfurization using the dry desulfurization apparatus according to any one of claims 1 to 9, comprising:

putting the support grid plates (2) into a desulfurization tower (1) through discharge holes (104) corresponding to each layer of support grid plate (2), laying a first silk screen on the support grid plates (2), laying inert ceramic balls (3) on the first silk screen, laying a second silk screen on the inert ceramic balls (3), and closing the discharge holes (104);

filling a desulfurizing agent (4) on the second screen through a charging port (102);

introducing natural gas to be treated through an air inlet (101) at the top of the desulfurizing tower (1), reacting the natural gas to be treated with the desulfurizing agent (4) for desulfurization treatment, and discharging the natural gas from an air outlet (103) at the bottom of the desulfurizing tower (1) to obtain the target natural gas.

Technical Field

The application relates to the technical field of natural gas desulfurization, in particular to a dry desulfurization device and a desulfurization method.

Background

In the process of separating natural gas, the natural gas containing more hydrogen sulfide can not only generate peculiar smell during combustion, pollute the environment and influence the health, but also cause catalyst failure in the processing process. Therefore, the removal of hydrogen sulfide gas from natural gas is critical to the development of natural gas. The dry desulfurization is to utilize solid adsorption to perform natural gas desulfurization, i.e. hydrogen sulfide gas is adsorbed on the surface of a desulfurizing agent or reacts with certain components on the surface of the desulfurizing agent, so as to achieve the aim of desulfurization.

The related art provides a dry desulfurization apparatus including: the desulfurizing tower, the tower bottom of desulfurizing tower from last to being equipped with support grid tray in proper order down, the inert porcelain ball that tiling on the support grid tray and the desulfurizer of filling on inert porcelain ball. The natural gas enters from a gas port at the top of the desulfurizing tower to react with the desulfurizing agent, and the desulfurized natural gas flows out from a gas outlet at the bottom of the tower, so that the desulfurization of the natural gas is realized.

The inventors found that the related art has at least the following technical problems:

because the desulfurizer is filled to the top of the desulfurizing tower all the time, the stack height of the desulfurizer is large, the gas distribution in a desulfurizer bed layer is not uniform, and the use sulfur capacity is low due to low utilization efficiency of the desulfurizer; furthermore, because the bed height of the desulfurizer in the desulfurizing tower is large, the lower desulfurizer is stressed greatly, the desulfurizer is easy to harden and the like, so that the desulfurizing effect is not ideal, and the desulfurizer is difficult to unload.

Disclosure of Invention

The embodiment of the application provides a dry desulfurization device and a dry desulfurization method, which can solve the problems that the accumulation height of a desulfurizer is large, the gas distribution in a desulfurizer bed layer is not uniform, and the utilization efficiency of the desulfurizer is low, so that the used sulfur capacity is low; the bed height of the desulfurizer in the desulfurizing tower is large, so that the lower desulfurizer is stressed greatly, the desulfurizer is easy to harden and the like, and the technical problems of non-ideal desulfurizing effect and difficult removal of the desulfurizer are solved. The specific technical scheme is as follows:

in one aspect, there is provided a dry desulfurization apparatus comprising: the desulfurization tower, the multilayer support grid plate, the inert ceramic ball, the silk screen and the desulfurizer;

the multiple layers of support grid plates are positioned in the desulfurizing tower, and each layer of support grid plate is arranged at intervals;

the wire mesh comprises a first wire mesh and a second wire mesh, the first wire mesh is laid on each layer of support grid plate, the inert ceramic balls are laid on the first wire mesh, the second wire mesh is laid on the inert ceramic balls, and the desulfurizer is placed on the second wire mesh;

the size of the grid of the support grid plate and the size of the grid of the first wire mesh are both smaller than the size of the inert ceramic ball;

the tower top of desulfurizing tower has air inlet and charging hole, and the bottom of the tower has the gas outlet, the outer wall of desulfurizing tower is provided with a plurality of discharge openings, and a discharge opening and one it is corresponding to support the grid tray, just the discharge opening is located support on the grid tray.

In an alternative embodiment, the support grid comprises: two first support grids, two second support grids and a third support grid;

the third support grid plate is positioned between the two second support grid plates, one first support grid plate is connected with one second support grid plate, and the other first support grid plate is connected with the other second support grid plate.

In an alternative embodiment, the two first support grids, the two second support grids, and the third support grid each have a width less than the diameter of the discharge opening.

In an alternative embodiment, the first support grid, the second support grid and the third support grid are sequentially increased in strength.

In an optional embodiment, the apparatus further comprises: the support piece, the support piece with the inner wall of desulfurizing tower is connected, the base of support grid tray with the support piece offsets.

In an alternative embodiment, the apparatus further comprises a blowdown line connected to the bottom of the desulfurization tower.

In an alternative embodiment, the lower edge of the discharge aperture is spaced from the support grid by 200 and 500 mm.

In an alternative embodiment, the distance between the desulfurizing agent and the upper layer of the supporting grid is greater than or equal to 300 mm.

In an alternative embodiment, the inert ceramic balls have a thickness of 100 and 200 mm.

In an optional embodiment, the apparatus further comprises a wedge-shaped guide ring located on the first wire mesh and located on an inner wall of the desulfurization tower.

In another aspect, there is provided a dry desulfurization method for desulfurization using any one of the dry desulfurization apparatuses described above, the method including:

placing the support grid plates into a desulfurization tower through discharge holes corresponding to each layer of support grid plate, laying a first silk screen on the support grid plates, laying inert ceramic balls on the first silk screen, laying a second silk screen on the inert ceramic balls, and closing the discharge holes;

filling a desulfurizing agent on the second silk screen through a charging port;

and introducing natural gas to be treated through an air inlet at the top of the desulfurizing tower, reacting the natural gas to be treated with the desulfurizing agent, and discharging the natural gas from an air outlet at the bottom of the desulfurizing tower after desulfurization treatment to obtain the target natural gas.

The device provided by the embodiment of the application has the following technical effects:

according to the device provided by the embodiment of the application, the desulfurizer is arranged in a layered manner by arranging the plurality of layers of supporting grid plates, so that the channeling effect is reduced, and the natural gas is distributed more uniformly; and the desulfurizer is arranged in layers, so that the stress of the desulfurizer at the bottom is reduced, the pulverization and the hardening of the desulfurizer are reduced, the using sulfur capacity of the desulfurizer is improved, the longer-period use of the desulfurizer can be realized, the utilization rate is higher, the desulfurizer is easier to remove, and different gases can be removed through different desulfurizers arranged on the multilayer support grid plates.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a desulfurization unit provided in one embodiment of the present application;

FIG. 2 is a schematic view of a support plate assembly according to an embodiment of the present application;

FIG. 3 is a schematic view of a desulfurization unit provided in example two of the present application;

FIG. 4 is a schematic view of a desulfurization apparatus provided in example two of the present application.

Reference numerals:

1-a desulfurizing tower, 101-an air inlet, 102-a charging port, 103-an air outlet, 104-a discharging hole, 2-a supporting grid plate, 21-a first supporting grid plate, 22-a second supporting grid plate, 23-a third supporting grid plate, 3-an inert ceramic ball, 4-a desulfurizing agent, 5-a supporting member, 6-a sewage discharge pipeline and 7-a wedge-shaped guide ring.

Detailed Description

Unless defined otherwise, all technical terms used in the examples of the present application have the same meaning as commonly understood by one of ordinary skill in the art.

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Aiming at the problems of uneven distribution of desulfurizer bed gas, large desulfurizer bed height, easy hardening of desulfurizer, low sulfur using capacity, difficulty in simultaneously removing various gases through one desulfurizing tower 1 and the like existing in the conventional natural gas dry-method desulfurizer filling mode, the embodiment of the application provides a dry-method desulfurizing device, and aims to solve the technical problems.

In one aspect, an embodiment of the present application provides a dry desulfurization apparatus, as shown in fig. 1, the dry desulfurization apparatus includes: the device comprises a desulfurizing tower 1, a plurality of layers of supporting grid plates, inert ceramic balls 3, a wire mesh and a desulfurizing agent 4;

the multiple layers of support grid plates 2 are positioned in the desulfurizing tower 1, and each layer of support grid plate 2 is arranged at intervals;

the silk screen comprises a first silk screen and a second silk screen, the first silk screen is paved on each layer of support grid plate 2, the inert ceramic balls 3 are paved on the first silk screen, the second silk screen is paved on the inert ceramic balls 3, and the desulfurizer 4 is placed on the second silk screen;

the size of the grid of the support grid plate 2 and the size of the grid of the first wire mesh are both smaller than the size of the inert ceramic ball 3;

the top of the desulfurizing tower 1 is provided with an air inlet 101 and a charging port 102, the bottom of the desulfurizing tower 1 is provided with an air outlet 103, the outer wall of the desulfurizing tower 1 is provided with a plurality of discharge holes 104, one discharge hole 104 corresponds to one support grid plate 2, and the discharge hole 104 is positioned above the support grid plate 2.

The device provided by the embodiment of the application has the following technical effects:

according to the device provided by the embodiment of the application, the desulfurizer 4 is arranged in a layered manner by arranging the plurality of layers of supporting grid plates 2, so that the channeling effect is reduced, the natural gas is distributed more uniformly, and the utilization efficiency of the desulfurizer 4 is higher; and the desulfurizer 4 is arranged in layers, so that the stress of the desulfurizer 4 at the bottom is reduced, the pulverization and the hardening of the desulfurizer 4 are reduced, the using sulfur capacity of the desulfurizer 4 is improved, the desulfurizer 4 can be used for a longer period, the desulfurizer 4 can be removed more easily, and different gases can be removed by arranging different desulfurizers 4 on a plurality of layers of support grid plates.

It should be noted that the support grids 2 provided in the embodiments of the present application are multi-layered, and the number of the support grids 2 may be determined according to the height of the desulfurization tower 1. As an example, when the height of the desulfurization tower 1 is high, the number of the support grids 2 may be set to be large, and may be, for example, 2 layers, 3 layers, 4 layers, or the like. The number of support grids 2 may also be determined according to the type of gas to be removed from the natural gas. As an example, when the hydrogen sulfide and carbon dioxide in the natural gas need to be removed, the number of the support grids 2 is at least two, and the type of the desulfurizing agent 4 between each layer of the support grid 2 is set differently, so as to achieve the purpose of removing the hydrogen sulfide and the carbon dioxide. It will be appreciated that when the gases to be removed are carbon dioxide and hydrogen sulfide, 3 or 4 layers of support grids 2 may be provided to enhance the removal.

That is, in the apparatus provided in the embodiment of the present application, the kinds of the desulfurizing agents 4 may be the same or different between each layer of the support grid 2. But the desulfurizing agent 4 on one layer of the supporting grid 2 should be of the same kind to achieve a concentrated removal of one gas. As an example, the desulfurizing agent 4 provided in the embodiment of the present application may be a desulfurizing agent.

It is understood that, since the support grid 2 needs to support the weight of the desulfurizing agent 4, the material of the support grid 2 needs to have certain strength, and the support grid 2 is corroded due to the fact that most of the gases removed from the natural gas are acid gases, for example, carbon dioxide, sulfur dioxide, hydrogen sulfide gas and the like are acid gases. Therefore, the material of the support grid 2 provided by the embodiment of the present application may be a support grid made of stainless steel.

It should be noted that, by laying the first wire mesh and the second wire mesh above and below the inert ceramic balls 3, the distribution of the gas can be better realized, and the distribution efficiency of the gas in the desulfurizer is improved. It can be understood that the first wire mesh is located below the inert ceramic balls 3, and the second wire mesh is located above the rigid ceramic balls and below the desulfurizer 4, i.e. the first wire mesh and the second wire mesh need to bear the weight of the desulfurizer 4, and therefore the first wire mesh and the second wire mesh need to have certain strength, for example, the first wire mesh and the second wire mesh may be stainless steel wire meshes.

The size of the grid of the support grid plate 2 and the size of the grid of the first screen mesh are smaller than the size of the inert ceramic ball 3, so that the desulfurizer 4 can be prevented from falling from the grid of the first screen mesh and the grid of the support grid plate 2. It should be noted that the size of the first wire mesh and the mesh of the support grid 2 cannot be too small, so that the gas is difficult to pass through, and the size of the first wire mesh and the mesh of the support grid 2 cannot be too large, so that the desulfurizing agent 4 falls off from the mesh. As an example, the size of the first mesh grid and the grid of the support grid 2 may be half or three-quarters of the diameter of the desulfurizing agent 4.

It can be understood that, when the desulfurization operation is completed, the desulfurization agent 4 needs to be charged into the desulfurization tower 1, and therefore, the charging of the desulfurization agent is completed by providing the charging port 102 at the top of the desulfurization tower 1. The natural gas to be treated is introduced into the desulfurization tower 1 by providing an air inlet 101 at the top of the desulfurization tower 1.

It should be noted that since the desulfurizing agent 4 in the desulfurizing tower 1 needs to be discharged after the completion of the desulfurizing operation, the discharging of the desulfurizing agent 4 is completed by providing the discharge hole 104 in the bottom portion of the desulfurizing tower 1. Because the desulfurizer 4 in the desulfurization tower 1 needs to be discharged manually, the diameter of the discharge hole 104 cannot be too small, which makes the hand of the operator difficult to enter, and for example, the size of the discharge hole 104 can be matched with the size of the hand of a person, so as to ensure that the hand can extend into the discharge hole to complete the discharge of the desulfurizer 4. The discharge holes 104 provided in the embodiments of the present application may also be used to remove the support grid 2, the first wire and the second wire.

The embodiment of the application arranges the discharge holes 104 above the supporting grid plates 2, and each supporting grid plate 2 is provided with one corresponding discharge hole 104, so as to ensure the removal of the desulfurizer 4 on each layer of supporting grid plate 2.

In an alternative embodiment, the lower edge of the discharge aperture 104 is at a distance of 200 and 500mm from the support grid 2.

It should be noted that the distance between the discharge holes 104 and the support grid 2 cannot be too far, which may affect the discharge of the desulfurizing agent 4, and for example, the lower edges of the discharge holes 104 may be 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, etc. from the support grid 2. Therefore, the support grid plate 2 and the desulfurizer 4 can be conveniently detached by operators.

It should be noted that, in the support grid 2 provided in the embodiment of the present application, the distance between the support grid 2 closest to the top of the desulfurization tower 1 and the top of the desulfurization tower 1 should be greater than or equal to 200mm, so that the desulfurizing agent 4 and the top of the desulfurization tower 1 have a certain space, and the gas is redistributed, thereby improving the removal efficiency.

In an alternative embodiment, the distance between the desulphurating agent 4 and the layer of support grid 2 located above the desulphurating agent is greater than or equal to 300 mm.

The gas inlet 101 that this application embodiment provided is located the top of the tower of desulfurizing tower 1, and is greater than or equal to 400mm with top layer desulfurizer surface distance, and the export pipeline is located the bottom of desulfurizing tower 1, and is greater than or equal to 300mm with bottom support grid 2 distance. By adopting the method, liquid accumulation at the bottom of the desulfurizing tower 1 can not be caused, liquid drainage is not needed, and more than two layers of inert ceramic balls 3 can be paved at the top of the desulfurizing agent at the top layer so as to prevent airflow from carrying away the desulfurizing agent 4.

It should be noted that, according to the device provided in the embodiment of the present application, the gas inlet 101 may be further located at the bottom of the desulfurization tower 1, and the distance from the bottom support grid 2 is greater than or equal to 300mm, and the gas outlet 103 may be further located at the upper portion of the desulfurization tower 1, and the distance from the surface of the top layer desulfurizing agent is greater than or equal to 500mm, which may cause liquid accumulation at the bottom of the desulfurization tower 1, and the liquid needs to be regularly discharged.

In an alternative embodiment, as shown in fig. 2, the support grid 2 comprises: two first support louvers 21, two second support louvers 22, and a third support louver 23;

the third support louver 23 is located between the two second support louvers 22, one first support louver 21 is connected to one second support louver 22, and the other first support louver 21 is connected to the other second support louver 22.

It should be noted that the support grids provided in the embodiments of the present application may be disassembled according to the kind of the desorbed gas or the degree of the desorption, and therefore, the support grids are provided as the detachable first support grid 21, second support grid 22, and third support grid 23. When installed, the first support grid 21, the second support grid 22 and the third support grid 23 are placed into the desulfurization tower 1 through the discharge holes 104, respectively.

In an alternative embodiment, the first support grid 21, the second support grid 22 and the third support grid 23 are detachably connected. As an example, it is possible to provide connection holes at both ends where the third support louver 23 is connected to the two second support louvers 22, connect the third support louver 23 to the two support louvers by means of connection rods, provide connection holes at both ends of the two support louvers, respectively, and connect the second support louver 22 to the two first support louvers 21 by means of connection rods.

In an alternative embodiment, the two first support grids 21, the two second support grids 22, and the third support grid 23 each have a width less than the diameter of the discharge hole 104.

It is understood that, since the first support fence 21, the second support fence 22 and the third support fence 23 are put into the desulfurization tower 1 through the discharge holes 104, the widths of the first support fence 21, the second support fence 22 and the third support fence 23 should be smaller than the diameter of the discharge holes 104.

In an alternative embodiment, the strength of the first support grid 21, the second support grid 22, and the third support grid 23 is increased in order.

It should be noted that the support grid 2 provided in the present application is required to bear the weight of the desulfurizing agent 4, and therefore, there is a certain requirement for the strength of the first support grid 21, the second support grid 22, and the third support grid 23, and since the desulfurizing agent 4 is charged into the desulfurizing tower 1 through the charging port 102, most of the desulfurizing agent 4 is concentrated in the middle of the support grid. Therefore, the strength of the first support grid 21, the second support grid 22, and the third support grid 23 is increased in order, and the support effect of the desulfurizing agent 4 is improved.

In an optional embodiment, the apparatus further comprises: support piece 5, support piece 5 are connected with the inner wall of desulfurizing tower 1, and the base that supports grid tray 2 offsets with support piece 5.

It can be understood that the support grid 2 is connected with the inner wall of the desulfurization tower 1, and needs to provide a certain support force. Therefore, by arranging the support 5 to be connected with the inner wall of the desulfurization tower 1, the bottom edge of the support grid 2 abuts against the support 5 to ensure the stability of each layer of support grid 2.

As an example, the support member 5 may be a support rod, and the material of the support rod may be a stainless steel support rod, so as to prevent the acidic gas in the desulfurization tower 1 from corroding the support rod.

It should be noted that the number of the supporting members 5 provided in the embodiment of the present application may be plural, that is, a ring of the supporting members 5 may be provided along the circumferential direction of the bottom edge of each supporting grid 2. The number of the supporting members 5 is not limited thereto in the embodiments of the present application.

In an alternative embodiment, the apparatus further comprises a blowdown line 6, the blowdown line 6 being connected to the bottom of the desulfurization tower 1.

It should be noted that, through setting up the blow off pipe, can discharge the bottom hydrops of desulfurizing tower 1 at regular time, can also carry out periodic inspection and maintenance to desulfurizing tower 1.

In an alternative embodiment, the thickness of the inert ceramic balls 3 is 100 and 200 mm.

In an alternative embodiment, as shown in fig. 3 and 4, the apparatus provided in the examples of the present application further includes a wedge-shaped guide ring 7, and the wedge-shaped guide ring 7 is located on the inner wall of the desulfurization tower 1 and is located on the first wire mesh.

Referring to fig. 3, the radii of the wedge-shaped guide rings 7 provided by the present application are sequentially increased from top to bottom, and the shapes thereof are similar to those of a right triangle, wherein the bottom side of the right triangle is pressed on the first screen, the right-angle side is connected with the inner wall of the desulfurizing tower 1, and the oblique side is in contact with a desulfurizing agent. Through setting up wedge shape guide ring 7 can make the inner wall face velocity of flow of desulfurizing tower 1 reduce the production of restriction furrow, increase the gas disturbance effect simultaneously, make gas mixture more even.

As an example, referring to fig. 4, the wedge-shaped guide ring 7 provided by the embodiment of the present application may include three evenly distributed ring structures, and each ring structure has a central rounded corner of 120 °. And the material of the wedge-shaped guide ring 7 is preferably light corrosion-resistant material, and the wedge-shaped guide ring is uniformly arranged on the support grid plate 2 along the tower wall of the desulfurizing tower 1. As an example, the wedge-shaped guide ring 7 provided by the embodiment of the application has a width of 200mm at the bottom surface and a height of 200 mm.

It should be noted that, when installing the device, after the support grid plate 2 is placed into the desulfurizing tower 1 through the discharge hole 104, the first screen mesh is laid on the support grid plate 2, then the wedge-shaped guide ring 7 is placed through the discharge hole 104 to press the first screen mesh, the inert ceramic balls 3 are laid on the first screen mesh, and the discharge hole 104 is closed after the second screen mesh is laid on the inert ceramic balls 3.

In another aspect, there is provided a dry desulfurization method for desulfurization using any one of the dry desulfurization apparatuses described above, the method including:

placing the support grid plates 2 into the desulfurization tower 1 through the discharge holes 104 corresponding to each layer of the support grid plate 2, laying a first wire mesh on the support grid plates 2, laying inert ceramic balls 3 on the first wire mesh, laying a second wire mesh on the inert ceramic balls 3, and closing the discharge holes 104;

filling a desulfurizing agent 4 into the second screen mesh through the charging port 102;

introducing natural gas to be treated through the gas inlet 101 at the top of the desulfurizing tower 1, reacting the natural gas to be treated with the desulfurizing agent 4 to perform desulfurization treatment, and discharging the natural gas from the gas outlet 103 at the bottom of the desulfurizing tower 1 to obtain the target natural gas.

The desulfurization process provided herein will be further described by way of optional examples.

In the first embodiment, two layers of desulfurizing agents are arranged on the two support grid plates 2 to realize the removal of the single gas hydrogen sulfide.

The inside diameter of the desulfurizing tower 11 is 2000mm for D1, and the inside diameter of the bottom discharge hole 104 is the same with the inside diameter of the second layer discharge hole 104, is 500mm for D2, and the maximum width of the two first support grid plates 21, the two second support grid plates 22 and the third support grid plate 23 is 400 mm.

A first layer of support grid plate 2 is arranged through the bottom discharge holes 104, a preset first silk screen is arranged through the bottom discharge holes 104, the first silk screen is laid on the support grid plate 2, inert ceramic balls 3 with the thickness of about 150mm are laid on the first silk screen, and the size of the grids of the support grid plate 2 is smaller than the diameter of the inert ceramic balls 3, so that the inert ceramic balls 3 cannot fall from the grids of the support grid plate 2; a second screen is laid over the inert ceramic balls 3 and the bottom discharge openings 104 are closed.

The first layer of desulfurizer is loaded through a top charging port 102 of the desulfurizing tower 1, and the first layer of desulfurizer is loaded when the top surface of the first layer of desulfurizer is close to 300mm away from the second layer of support grid plate 2.

Similarly, a second layer of supporting grid plate is arranged through a second layer of discharging holes 104, a first wire mesh, a second layer of inert ceramic balls 3 with the thickness of 150mm and a second wire mesh are sequentially arranged, the second layer of discharging holes 104 are closed, a desulfurizer is arranged into the second layer through a charging hole 102 in the top of the desulfurizing tower 1, an iron oxide desulfurizer which is the same as the first layer of desulfurizer is adopted as the second layer of desulfurizer, and filling of the second layer of desulfurizer is completed when the top surface of the second layer of desulfurizer is 500mm away from the corresponding position of the air inlet 101.

The natural gas to be treated enters from the gas inlet 101, is desulfurized by the second layer of desulfurizing agent and the first layer of desulfurizing agent from top to bottom and then is discharged from the gas outlet 103, so that the hydrogen sulfide in the gas is removed.

In the method provided by the embodiment, because a two-layer filling mode is adopted, on one hand, the gas distribution can be more uniform, and meanwhile, the stress of the first layer of desulfurizer can be reduced, the total service time of the desulfurizer is prolonged, and the improvement of the sulfur capacity of the desulfurizer is realized.

When the service cycle of the desulfurizer is finished, the desulfurizer needs to be replaced, and the removal step is as follows.

And opening the second layer of discharge holes 104, collecting and discharging the second layer of desulfurizing agent, and sequentially taking out the second silk screen, the inert ceramic balls 3 on the second layer, the first silk screen and the second layer of supporting grid plate 2 through the second layer of discharge holes 104.

And opening the discharge holes 104 of the first layer, collecting and discharging the desulfurizer of the first layer, and sequentially taking out the second wire mesh, the inert ceramic balls 3, the first wire mesh and the first layer of support grid plate 2 through the discharge holes 104 of the first layer, thereby completing the discharge of the whole desulfurizer.

Example two, three layers of desulfurizers, to achieve the removal of two gases, hydrogen sulfide and mercaptan.

As shown in fig. 3, the inside diameter of the desulfurizing tower 11 is D1-2000 mm, the inside diameters of the first layer of discharge holes 104 and the second layer of discharge holes 104 are the same, D2-500 mm, and the diameter of the third layer of discharge holes 104 is D3-450 mm. The maximum width of the support grids 2 is 400 mm.

When the desulfurizing tower 1 is filled, the first layer of support grid plate 2 is filled through the first layer of discharge holes 104, the first silk screen is laid on the first layer of support grid plate 2, the inert ceramic balls 3 with the thickness of about 150mm are laid on the first silk screen, the size of the grids of the support grid plate 2 is smaller than the diameter of the inert ceramic balls 3, the inert ceramic balls 3 cannot fall off from the grids, the second silk screen is laid on the inert ceramic balls 3, and then the first layer of discharge holes 104 are closed.

And a first layer of desulfurizer is loaded through a charging port 102 at the top of the desulfurizing tower 1, the first layer of desulfurizer is made of active molecular sieve and is mainly used for removing mercaptan components, and the first layer of desulfurizer is loaded when the top surface of the first layer of desulfurizer is close to 300mm away from the second layer of support grid plate 2.

The second layer of support grid plate 2 is firstly arranged through the second layer of discharge holes 104, the first silk screen, the inert ceramic balls 3 with the thickness of 150mm and the second silk screen are sequentially arranged, and the second layer of discharge holes 104 are closed.

And (3) filling a second layer of desulfurizing agent through a charging port 102 at the top of the desulfurizing tower 1, wherein the second layer of desulfurizing agent adopts an iron oxide desulfurizing agent and is used for removing hydrogen sulfide components, and filling the second layer of desulfurizing agent is completed when the top surface of the second layer of desulfurizing agent is close to the position 300mm away from the third layer of supporting grid plate 2.

The third layer of supporting grid plate 2 is firstly arranged through the third layer of discharging holes 104, the first silk screen, the inert ceramic balls 3 with the thickness of 150mm and the second silk screen are sequentially arranged, the third layer of discharging holes 104 are closed,

and (3) loading a third layer of desulfurizer through a charging port 102 at the top of the desulfurizing tower 1, wherein the third layer of desulfurizer adopts an iron oxide desulfurizer and is used for removing hydrogen sulfide components, and the third layer of desulfurizer is loaded when the top surface of the third layer of desulfurizer is 500mm away from the corresponding position of the gas inlet 101.

In the using process, the natural gas to be treated enters from the gas inlet 101, is desulfurized by the third layer of desulfurizer, the second layer of desulfurizer and the first layer of desulfurizer from top to bottom and then is discharged from the gas outlet 103, so that the hydrogen sulfide and mercaptan components in the natural gas are removed.

Due to the adoption of a three-layer filling mode, on one hand, the gas distribution is more uniform, and meanwhile, the stress of the second layer of desulfurizing agent and the first layer of desulfurizing agent can be reduced, the total service time of the desulfurizing agent is prolonged, and the improvement of the sulfur capacity of the desulfurizing agent is realized under the condition of removing two gases.

When the service cycle of the desulfurizer is finished, the desulfurizer needs to be replaced, and the removal step is as follows.

And opening a third layer of discharge holes 104, collecting and discharging the third layer of desulfurizer, and sequentially taking out the second silk screen, the inert ceramic balls 3, the first silk screen and the support grid plate 2 through the third layer of discharge holes 104. And opening the second layer of discharge holes 104, collecting and discharging the second layer of desulfurizing agent, and sequentially taking out the second silk screen, the inert ceramic balls 3, the first silk screen and the support grid plate 2 through the second layer of discharge holes 104. And opening the first layer of discharge holes 104, collecting and discharging the first layer of desulfurizer, collecting and recycling the desulfurizer separately, and taking out the second wire mesh, the inert ceramic balls 3, the second wire mesh and the support grid plate 2 from the first layer of discharge holes 104 in sequence to finish the discharging of the whole desulfurizer.

According to the method provided by the embodiment of the application, the desulfurizer 4 is arranged in a layered manner through the multiple layers of support grid plates, so that the channeling effect is reduced, the natural gas is distributed more uniformly, and the utilization efficiency of the desulfurizer 4 is higher; and the desulfurizer 4 is arranged in layers, so that the stress of the desulfurizer 4 at the bottom is reduced, the pulverization and the hardening of the desulfurizer 4 are reduced, the using sulfur capacity of the desulfurizer 4 is improved, the desulfurizer 4 can be used for a longer period, the desulfurizer 4 can be removed more easily, and different gases can be removed by arranging different desulfurizers 4 on the multi-layer support grid plate 2.

The above description is only exemplary of the present application and should not be taken as limiting the scope of the present application, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present application should be included in the scope of the present application.