CN220633678U

CN220633678U - Ammonia washing tower

Info

Publication number: CN220633678U
Application number: CN202322001056.6U
Authority: CN
Inventors: 索锋涛; 李强; 袁厅厅; 周明; 张博慧; 谈斐; 来建飞
Original assignee: SHAANXI SHANHUA COAL CHEMICAL INDUSTRY GROUP CO LTD
Current assignee: SHAANXI SHANHUA COAL CHEMICAL INDUSTRY GROUP CO LTD
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-03-22
Anticipated expiration: 2033-07-27

Abstract

The application provides an ammonia washing tower, which comprises a tower body and a tower tray assembly. The tower body comprises a tower top, a tower wall and a tower bottom; the tower wall is a vertical cylinder, the tower top is connected to the top end of the tower wall, and the tower bottom is connected to the bottom end of the tower wall; a lining is arranged on the inner wall of the tower wall; the lining is made of 321 stainless steel; the tray assembly is horizontally arranged in the tower body and is connected with the inner wall of the tower wall through a tray support piece; the tray support piece is made of 2205 duplex stainless steel. According to the utility model, the lining material of the tower wall of the ammonia washing tower is changed into a 321 stainless steel plate with the thickness of 5 mm; meanwhile, the material of the internal parts of the ammonia washing tower is changed into 2205 duplex stainless steel, so that potential safety hazards caused by corrosion inside the tower are fundamentally eliminated, and the safe and stable operation of the ammonia washing tower is ensured.

Description

Ammonia washing tower

Technical Field

The application belongs to the technical field of chemical equipment, and particularly relates to an ammonia washing tower.

Background

CO in the process gas from the gasification section reacts with water vapor at a proper temperature under the action of a catalyst to generate the required H2 and CO2, and the CO content is reduced from 47.71% to below 1.5%; then, the ammonia is passed through an ammonia washing tower, and after a trace amount of ammonia is washed by cold sealing water (desalted water), the qualified conversion gas is sent to a low-temperature methanol washing device. Under the working condition, the existing ammonia washing tower inner part and the tower inner lining are easy to be severely corroded. In particular, the floating valve, the liquid-falling plate, the outlet weir and the tower wall are all in point corrosion, the corrosion condition is gradually aggravated, and even a plurality of position points of lining plate layers penetrate and corrode to form pits with different degrees, so that the equipment body tower wall surface has a flowing corrosion pit.

Disclosure of Invention

The utility model aims at least solving one of the technical problems existing in the prior art or related technology, namely reducing or even avoiding the corrosion condition of the tower wall lining of the ammonia washing tower and various tower internals.

In view of the above, the utility model provides an ammonia washing tower, which fundamentally eliminates potential safety hazards caused by corrosion in the tower through changing the materials of the tower wall lining and the tower inner parts.

The method specifically comprises the following technical scheme:

according to an embodiment of the application, an ammonia washing tower is provided, which comprises a tower body and a tower tray assembly; the tower body comprises a tower top, a tower wall and a tower bottom; the tower wall is a vertical cylinder, the tower top is connected to the top end of the tower wall, and the tower bottom is connected to the bottom end of the tower wall; a lining is arranged on the inner wall of the tower wall; the lining is made of 321 stainless steel; the tray assembly is horizontally arranged in the tower body and is connected with the inner wall of the tower wall through a tray support piece; the tray support piece is made of 2205 duplex stainless steel.

Further, the tray assembly comprises a first tray and a second tray; a first gap is arranged between one end of the first tray and the tower wall; a second gap is arranged between one end of the second tray far away from the first gap and the tower wall; the first tray and the second tray are arranged inside the tower body at different heights.

Further, at least two trays are provided; the two first trays and the two second trays are arranged inside the tower body in a staggered manner according to the sequence from top to bottom.

Further, the ammonia washing tower also comprises a liquid reducing connecting plate; the first tray and the second tray are connected with one liquid-reducing connecting plate; the liquid-reducing connecting plate is vertically connected to the edge of the first tower tray, which is positioned at the first notch, and the edge of the second tower tray, which is positioned at the second notch; the horizontal width of the liquid-falling connecting plate is the same as the width of the first notch and the width of the second notch; the material of the liquid-reducing connecting plate is 2205 duplex stainless steel.

Further, the upper end of the liquid-reducing connecting plate is higher than the first tray and the second tray to form a first overflow weir.

Further, the ammonia washing tower also comprises a liquid sealing disc; the lower part of each liquid-lowering connecting plate is provided with one liquid sealing disc; the liquid sealing disc is connected to the inner wall of the tower wall; the material of the liquid sealing disk is 2205 duplex stainless steel.

Preferably, the projection of the lower end of the liquid-falling connecting plate on the horizontal plane is positioned in the liquid sealing disc.

Further, the edge of the liquid sealing disc protrudes upwards to form a second overflow weir.

Preferably, the tray support comprises a support seat and a support ring; the side surface of the support is connected to the inner wall of the tower wall; the bottom surface of the support ring is connected to the upper end of the support, and the side edge of the support ring is connected with the inner wall of the tower wall in a sealing manner; the bottom surface of the first tray and the bottom surface of the second tray are connected with the top surface of the supporting ring.

Preferably, the lining is arranged on the inner wall of the tower wall in an omnibearing manner; the thickness of the liner was 5mm.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

according to the utility model, the lining material of the tower wall of the ammonia washing tower is changed into a 321 stainless steel plate with the thickness of 5 mm; meanwhile, the material of the internal parts of the ammonia washing tower is changed into 2205 duplex stainless steel, so that potential safety hazards caused by corrosion inside the tower are fundamentally eliminated, and the safe and stable operation of the ammonia washing tower is ensured.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic longitudinal cross-sectional view of an embodiment of the present application;

FIG. 2 is a schematic longitudinal cross-sectional view of one tray of the embodiments of the present application;

FIG. 3 is a top view of one tray of the embodiments of the present application;

fig. 4 is a top view of one tray support in an embodiment of the present application.

The reference numerals are expressed as:

1-a tower body; 11-tower top; 12-tower wall; 121-lining; 13-the bottom of the tower;

21-a first tray; 211-a first notch; 22-a second tray; 221-a second gap;

3-a liquid-dropping connecting plate; 31-a first weir;

4-a liquid sealing disc; 41-a second weir;

51-supporting seat; 52-support ring.

Detailed Description

In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments of the present application may be combined with each other without conflict.

In view of this, according to an embodiment of the present application, an ammonia scrubber is provided, as shown in fig. 1, comprising a tower body 1 and a tray assembly; the tower body 1 comprises a tower top 11, a tower wall 12 and a tower bottom 13; the tower wall 12 is a vertical cylinder, the tower top 11 is connected to the top end of the tower wall 12, and the tower bottom 13 is connected to the bottom end of the tower wall 12; a liner 121 is arranged on the inner wall of the tower wall 12; the lining 121 is made of 321 stainless steel; the tray assembly is horizontally arranged inside the tower body 1 and is connected with the inner wall of the tower wall 12 through a tray support piece; the tray support piece is made of 2205 duplex stainless steel.

The 321 stainless steel has good corrosion resistance, and particularly has more outstanding corrosion resistance in an acidic environment with poor heat resistance. Meanwhile, 321 stainless steel has good forgeability, stretchability and weldability, and can be conveniently processed into various shapes according to requirements. In this embodiment, the liner 121 is required to have high corrosion resistance and to cover the entire inner wall of the tower wall 12, and thus, the 321 stainless steel is selected to be fully satisfactory. 2205 duplex stainless steel also has a strong corrosion resistance, in particular with uniform corrosion and localized corrosion resistance properties. Meanwhile, the 2205 duplex stainless steel has excellent strength and toughness and can bear the effects of high stress and high impact load. 2205 duplex stainless steel also has good fatigue resistance and can still maintain stable performance under the condition of long-term high stress. Therefore, 2205 duplex stainless steel was selected as the material for the ammonia wash tower internals in this example.

Further, in one embodiment, the tray assembly includes a first tray 21 and a second tray 22; a first notch 211 is arranged between one end of the first tray 21 and the tower wall 12; a second notch 211 is arranged between the end of the second tray 22 away from the first notch 211 and the tower wall 12; the first tray 21 and the second tray 22 are disposed inside the column body 1 at different heights.

In this embodiment, the first tray 21 and the second tray 22 are both sieve trays. The process gas from the gasification section enters the ammonia washing tower from the lower part of the tower body 1, then goes up through the sieve holes of the second tray 22 and the first tray 21 in sequence, and the ammonia content in the process gas is washed by cold sealing water entering from the upper part of the tower body 1. The washed ammonia water flows from the first notch 211 to the second tray 22, and flows to a further layer through the second notch 221 after further washing. The first notch 211 and the second notch 221 are opposite in direction, so that the liquid can effectively fall from the upper layer to the lower layer.

Further, in one embodiment, there are at least two of the first tray 21 and the second tray 22; the two first trays 21 and the two second trays 22 are staggered in the tower body 1 in the order from top to bottom.

In this embodiment, three first trays 21 and three second trays 22 are respectively disposed in the tower body 1 from top to bottom, and the first trays 21, the second trays 22, the first trays 21, and the second trays 22 … … are arranged from top to bottom in order, so that the notch directions of each tray are staggered. The ammonia water after cold seal water washing process gas flows from the uppermost tray layer to the lowermost tray layer, so that the ammonia water is sufficiently washed in the process.

Preferably, in this embodiment, the distance between two adjacent trays is 500mm.

Further, in one embodiment, the ammonia wash tower further comprises a downcomer connection plate 3; the first tray 21 and the second tray 22 are connected with one liquid-reducing connecting plate 3; the liquid-reducing connecting plate 3 is vertically connected to the edge of the first tray 21 located at the first notch 211 and the edge of the second tray 22 located at the second notch 221; the horizontal width of the liquid-lowering connecting plate 3 is the same as the width of the first notch 211 and the width of the second notch 221; the material of the liquid-reducing connecting plate 3 is 2205 duplex stainless steel.

The arrangement of the liquid-reducing connecting plate 3 prevents liquid from directly rushing into the lower layer, so that ammonia water on the tray on the upper layer can flow into the tray on the lower layer along the liquid-reducing connecting plate 3, and the ammonia water under the upper layer can be fully mixed with the ammonia water on the lower layer, and the purpose of uniform washing is realized. Here, the liquid-lowering connection plate 3 is also made of 2205 duplex stainless steel, and the function thereof is not described again.

Further, in one embodiment, the upper end of the downcomer connecting plate 3 is higher than the first tray 21 where it is located and the second tray 22 where it is located, so as to form a first overflow weir 31. The first overflow weir 31 is provided to allow the liquid to flow at a slower rate, further reducing the impact force of the liquid.

Further, in one embodiment, the ammonia wash tower further comprises a liquid seal tray 4; one liquid sealing disc 4 is arranged below each liquid dropping connecting plate 3; the liquid sealing disc 4 is connected to the inner wall of the tower wall 12; the material of the liquid sealing disk 4 is 2205 duplex stainless steel. The provision of the sealing disc 4 further slows down the flow of liquid to the next layer and ensures that the liquid is mixed evenly. Here, the liquid sealing disc 4 is made of 2205 duplex stainless steel, and the function thereof is not described again.

Preferably, the projection of the lower end of the liquid-falling connecting plate 3 on the horizontal plane is positioned in the liquid sealing disc 4. This arrangement allows the liquid flowing down from the downcomer connection plate 3 to pass entirely into the tray 4 without passing over the tray 4 directly into the next tray.

Further, in one embodiment, the edge of the sealing plate 4 protrudes upward to form a second overflow weir 41. The second weir 41 acts on the first weir 31 in the same way.

Preferably, in this embodiment, the tray support includes a seat 51 and a support ring 52; the side of the support 51 is connected to the inner wall of the tower wall 12; the bottom surface of the supporting ring 52 is connected to the upper end of the supporting seat 51, and the side edge of the supporting ring 52 is connected with the inner wall of the tower wall 12 in a sealing manner; the bottom surface of the first tray 21 and the bottom surface of the second tray 22 are connected to the top surface of the support ring 52. The tight connection of the side edges of the support ring 52 to the inner wall of the column wall 12 ensures that the liquid on the tray does not flow into the lower layer through the gap between the tray and the column wall 12, but only down through the downcomer connection plate 3, thus ensuring uniform mixing and uniform washing of the aqueous ammonia.

Preferably, in this embodiment, the liner 121 is disposed on the inner wall of the tower wall 12 in all directions; the thickness of the liner 121 is 5mm. The omnibearing arrangement of the lining 121 ensures the safety of the entire tower wall 12, while the lining 121 of 5mm thickness ensures the corrosion resistance of the lining 121.

Further, in this embodiment, the ammonia washing tower further includes a downcomer and a fixed block; the downcomer is arranged below the tray at the lowest layer and is used for guiding the ammonia water which is fully washed to the bottom 13 of the tower to be led out; the fixing blocks are connected to the inner wall of the tower wall 12 and are used for fixing the downcomer inside the tower body 1. Here, the fixing block is made of 2205 duplex stainless steel.

In the present utility model, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An ammonia wash tower, comprising: a tower body (1) and a tower tray assembly;

the tower body (1) comprises a tower top (11), a tower wall (12) and a tower bottom (13);

the tower wall (12) is a vertical cylinder, the tower top (11) is connected to the top end of the tower wall (12), and the tower bottom (13) is connected to the bottom end of the tower wall (12);

a lining (121) is arranged on the inner wall of the tower wall (12);

the lining (121) is made of 321 stainless steel;

the tray assembly is horizontally arranged inside the tower body (1) and is connected with the inner wall of the tower wall (12) through a tray support piece;

the tray support piece is made of 2205 duplex stainless steel.

2. Ammonia wash column according to claim 1, characterized in that the tray assembly comprises a first tray (21) and a second tray (22);

a first gap (211) is arranged between one end of the first tray (21) and the tower wall (12);

a second notch (221) is arranged between one end of the second tray (22) away from the first notch (211) and the tower wall (12);

the first tray (21) and the second tray (22) are arranged inside the tower body (1) at different heights.

3. The ammonia wash tower according to claim 2, wherein,

at least two first trays (21) and at least two second trays (22) are arranged;

the two first trays (21) and the two second trays (22) are arranged inside the tower body (1) in a staggered manner according to the sequence from top to bottom.

4. Ammonia wash tower according to claim 2, further comprising a drop connection plate (3);

the first tower tray (21) and the second tower tray (22) are connected with one liquid-dropping connecting plate (3);

the liquid-reducing connecting plate (3) is vertically connected to the edge of the first tower tray (21) positioned at the first notch (211) and the edge of the second tower tray (22) positioned at the second notch (221);

the horizontal width of the liquid-falling connecting plate (3) is the same as the width of the first notch (211) and the width of the second notch (221);

the material of the liquid-reducing connecting plate (3) is 2205 duplex stainless steel.

5. Ammonia wash tower according to claim 4, characterized in that the upper end of the downcomer connection plate (3) is higher than the first tray (21) where it is located and the second tray (22) where it is located, forming a first weir (31).

6. Ammonia wash tower according to claim 4, further comprising a liquid seal tray (4);

the lower part of each liquid-lowering connecting plate (3) is provided with one liquid sealing disc (4);

the liquid sealing disc (4) is connected to the inner wall of the tower wall (12);

the material of the liquid sealing disk (4) is 2205 duplex stainless steel.

7. Ammonia wash tower according to claim 6, characterized in that the projection of the lower end of the downcomer connection plate (3) on the horizontal plane is located in the liquid seal tray (4).

8. Ammonia wash tower according to claim 6, characterized in that the edges of the liquid sealing disc (4) protrude upwards forming a second overflow weir (41).

9. Ammonia wash tower according to claim 2, wherein the tray support comprises a support (51) and a support ring (52);

the side surface of the support (51) is connected to the inner wall of the tower wall (12);

the bottom surface of the supporting ring (52) is connected to the upper end of the support (51), and the side edge of the supporting ring (52) is connected with the inner wall of the tower wall (12) in a sealing way;

the bottom surface of the first tray (21) and the bottom surface of the second tray (22) are connected with the top surface of the supporting ring (52).

10. The ammonia wash tower according to claim 1, wherein,

the lining (121) is arranged on the inner wall of the tower wall (12) in an omnibearing manner;

the thickness of the lining (121) is 5mm.