CN109908632B

CN109908632B - Sedimentation tray and internal tower assembly

Info

Publication number: CN109908632B
Application number: CN201910324673.5A
Authority: CN
Inventors: 唐红萍; 刘铁勇; 谢润兴
Original assignee: Beijing Zehua Chemical Engineering Co ltd
Current assignee: Beijing Zehua Chemical Engineering Co ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2024-04-26
Anticipated expiration: 2039-04-22
Also published as: CN109908632A

Abstract

The invention relates to a sedimentation tray (100), characterized in that the sedimentation tray (100) comprises a plurality of tray decks (110), the tray decks (110) being arranged side by side to form a tray plane (120), wherein each tray deck (110) comprises a plurality of sedimentation zones (130) and bubbling zones (140) arranged alternately and a connecting wall (150) connecting the sedimentation zones (130) and the bubbling zones (140), the sedimentation zones (130) are designed to receive liquid flowing through and to be impermeable to gas, the bubbling zones (140) are designed to be permeable to gas, and the height of the bubbling zones (140) is higher than the height of the sedimentation zones (130). The invention also relates to an in-tower assembly (200) for use in a tower.

Description

Sedimentation tray and internal tower assembly

Technical Field

The present invention relates to a settling tray and to an in-column assembly for use in a column.

Background

In many industries such as petrochemical industry, coal chemical industry, chlor-alkali industry, chemical fertilizer industry and the like, when a tower is adopted for separation, the problem of blockage is often encountered, and possibly because gas or liquid materials to be treated contain solid matters such as dust, silt, coke powder, catalyst and the like, or in the mass transfer process, substances (such as inorganic salt, polymer and the like) which are easy to scale or coke are generated due to heating or chemical reaction and the like, and the substances can cause blockage of trays or filling materials, so that the trays or filling materials have to be stopped and cleaned frequently, and the normal operation is seriously affected.

When a plate tower is adopted, the solid substances can be deposited in a tray plate, a downcomer or a liquid receiving tray to prevent gas or liquid from passing through, a bubbling unit such as a sieve pore, a float valve, a fixed valve and the like is blocked, the mass transfer efficiency and the processing capacity of the tray are affected, even the tray can not work in severe cases, the tray can only be stopped for cleaning, and the tray can be put into use after processing.

For example, in the field of coal chemical industry, coal gasification wastewater contains phenol amine, which is generally recovered, but contains a large amount of dust, so that the problem of blockage is easily caused when phenol amine is recovered from the wastewater, and in order not to affect the operation period of the device, a plurality of towers are generally arranged to perform switching operation.

Disclosure of Invention

Aiming at the technical problems, the invention aims to provide a sedimentation tray and an internal tower assembly used in a tower, and the sedimentation tray and the internal tower assembly used in the tower can remarkably prolong the operation period and maintain higher mass transfer efficiency.

According to the present invention there is provided a settling tray comprising a plurality of tray decks, each of said tray decks being arranged side by side to form a tray plane, wherein each of said tray decks comprises a plurality of alternately arranged settling and bubbling zones and a connecting wall connecting each of said settling and bubbling zones, said settling zone being designed to receive liquid therethrough and to be impermeable to gas, said bubbling zone being designed to be permeable to gas and said bubbling zone being higher in elevation than said settling zone.

The tray plate provided by the invention is provided with a special sedimentation zone for sedimentation and storage of solid matters, the solid matters can be settled in the sedimentation zone without stirring of gas, the bubbling zone is not easy to be settled due to stirring of gas, and the settled solid matters can be transferred to the sedimentation zone, so that the operation period is prolonged.

According to a preferred embodiment of the sedimentation tray provided by the invention, the height of the bubbling zone is substantially flush with the tray plane.

According to a preferred embodiment of the sedimentation tray provided by the invention, the height of the sedimentation zone is substantially level with the tray plane.

According to a preferred embodiment of the settling tray provided by the invention, the structure enclosed by the settling zone and the connecting wall connecting the settling zone and the bubbling zone has a rectangular or trapezoidal cross-sectional shape.

In the above several embodiments of the settling tray provided by the present invention, a bubbling unit may also be arranged in the bubbling zone, the bubbling unit optionally being in the form of one or more of a float valve, a fixed valve, a mesh, a guide mesh, a tongue-fixing mesh.

Preferably, the bubbling unit is arranged on a connecting wall connecting the settling zone and the bubbling zone. This results in an increased area of the bubbling area and thus in a greater throughput of the device.

According to another aspect of the present invention there is also provided an in-tower assembly for use in a tower, the in-tower assembly comprising: a liquid receiving tray for receiving liquid flowing down from above; the liquid-lowering plates are used for guiding liquid to flow downwards, the longitudinal extension directions of the liquid-lowering plates are arranged along the horizontal direction, and the two ends of the liquid-lowering plates are designed to be suitable for being fixedly connected with the inner wall of the tower directly or indirectly; the in-column assembly further comprises a settling tray as described above, one side of the settling tray being adjacent to the downcomer plate and the other side being adjacent to the liquid receiving tray.

The extension direction of the settling zone and the bubbling zone of the settling tray may be arranged either transversely to the flow direction of the liquid from the liquid receiving tray to the liquid lowering plate or in correspondence with the flow direction of the liquid from the liquid receiving tray to the liquid lowering plate. When the former arrangement is used, since the settling zone and bubbling zone of the settling tray extend in a direction perpendicular to the direction of liquid flow, the liquid must pass through the bubbling zone and settling zone one by one during the flow from the liquid receiving tray to the liquid reducing plate without a so-called "short-circuit" flow of liquid, i.e. only through the settling zone or only through the bubbling zone, reaching the liquid reducing plate. When the latter arrangement is used, at least one blocking element adapted to block the continued flow of liquid in the extension direction of the sedimentation zones is arranged in each of the sedimentation zones in order to prevent a "short-circuit" flow of liquid. Preferably, the blocking element is in the form of a baffle or a three-dimensional geometry. Since the bubbling region is higher than the settling region, the direction of extension of the settling region and the bubbling region is consistent with the direction of flow of the liquid from the liquid receiving plate to the liquid reducing plate, so that the liquid is collected in the settling region and flows along the extending direction of the settling region in the flowing process, the blocking element blocks the flow in the settling region and returns the liquid to the high bubbling region, and the liquid which overflows the bubbling region is converged to the settling region again in the forward flowing process and possibly blocked again by the other blocking element to be diffused to the bubbling region again. Through such a process or (in case a plurality of blocking elements are arranged) a plurality of such processes, the liquid can continuously pass through the settling and bubbling zones and finally reach the downcomer plate. In this case, although a blocking member is additionally provided, cleaning is structurally more convenient.

In the above embodiment, the liquid receiving tray is arranged below the liquid falling plate, and after flowing onto the liquid receiving tray, liquid passes through a gap between the lower edge of the liquid falling plate and the liquid receiving tray and enters the tray deck in the horizontal direction. In another preferred embodiment of the invention for an internal column assembly within a column, the downcomer may also be provided in the form of a closed-bottom and open-cell suspended downcomer, in which case the tray is arranged below the downcomer for receiving liquid flowing down through the open-cell at the bottom of the downcomer, and it is contemplated that the tray may be designed with bubbling units to form a bubbling zone. At this time, the apparatus obtains a greater throughput due to the increased area of the bubbling region.

In the sedimentation tower tray, when the sedimentation area of the sedimentation tower tray is consistent with the plane height of the tower tray, the structure is more convenient to clean; when the bubbling area of the sedimentation tray is consistent with the height of the tray plane, the tray plate distance can be more effectively utilized, and the processing capacity is larger.

In a preferred embodiment of the invention for the in-column assembly in a column, the height of the liquid receiving tray is designed to be flush with the tray plane, which facilitates cleaning. However, in a further preferred embodiment of the invention for the in-column assembly in the column, the height of the liquid receiving tray can also be designed to be lower than the tray plane. At this time, the liquid receiving disc can also deposit and store part of solid matters, and plays a role in prolonging the operation period of the equipment.

Drawings

FIG. 1 illustrates one embodiment of the present invention for an in-column assembly within a column wherein the height of the settling zone of the settling tray is substantially level with the tray plane;

FIG. 2 illustrates one embodiment of the present invention for an in-column assembly within a column wherein the height of the bubble zone of the settling tray is substantially level with the tray plane;

Fig. 3 illustrates another embodiment of the invention for an in-column assembly in a column, wherein the height of the settling zone of the settling tray is substantially level with the tray plane, the direction of extension of the bubbling zone and the settling zone is different from fig. 1 and 2, and a blocking element arranged in the settling zone is visible;

Fig. 4 illustrates another embodiment of the invention for an in-column assembly in a column, wherein the bubble zone of the settling tray is substantially level with the tray plane, the bubble zone and the settling zone extend in different directions than in fig. 1 and 2, and a blocking element arranged in the settling zone is visible;

FIG. 5 illustrates a preferred embodiment of the present invention for an in-column assembly within a column wherein the liquid receiving tray is below the tray plane;

FIG. 6 illustrates one embodiment of the present invention for an in-column assembly within a column, schematically showing a downcomer plate formed as a suspended downcomer and a liquid receiving tray with a bubbling zone;

fig. 7 illustrates another embodiment of the in-tower assembly for use in a tower of the present invention, wherein the positional relationship between the upper deck and the lower deck receiving tray is schematically shown.

Detailed Description

The settling trays and internal column assemblies used within the column of the present invention will now be described in detail with reference to the accompanying drawings, which are only illustrative of the present invention and are not to be construed as limiting the present invention.

Fig. 1 illustrates one embodiment of the present invention for an in-tower assembly within a tower. The in-tower assembly 200 for use in a tower of the present invention comprises: a liquid receiving tray 210, the liquid receiving tray 210 being configured to receive liquid flowing down from above; the liquid-lowering plate 220, the liquid-lowering plate 220 is used for guiding the liquid to flow downwards, the longitudinal extending direction of the liquid-lowering plate 220 is arranged along the horizontal direction, and the two ends are designed to be suitable for being fixedly connected with the inner wall of the tower directly or indirectly; and a settling tray 100, wherein one side of the settling tray 100 is adjacent to the liquid-down plate 220, and the other side is adjacent to the liquid-receiving plate 210. Wherein the settling tray 100 comprises a plurality of tray decks 110, each tray deck 110 being arranged side by side to form a tray plane 120, wherein each tray deck 110 comprises a plurality of settling areas 130 and bubbling areas 140 arranged alternately, and a connecting wall 150 connecting each settling area and bubbling area, the settling areas 130 being designed to receive liquid therethrough and to be impermeable to gas, the bubbling areas 140 being designed to be permeable to gas, and the height of the bubbling areas 140 being higher than the height of the settling areas 130. The settling zone 130 is used to settle and store the solid matter because the solid matter can settle in the settling zone without agitation of the gas. The bubbling region 140 is less likely to be subject to sedimentation due to the agitating action of the gas. Here, the height of the settling zone 130 of the settling tray 100 is substantially flush with the tray plane 120 and the liquid receiving tray 210 is substantially flush with the tray plane 120, thereby forming a structure that is easy to clean.

As shown, the structure enclosed by the settling zone 130 and the connection wall 150 connecting the settling zone 130 and the bubbling zone 140 has a trapezoidal cross-sectional shape. On the connecting wall 150 between the two bubbling areas 140 on the right in fig. 1 and the sedimentation area 130, bubbling units are also arranged, which corresponds to an increase in the area of the bubbling areas.

These bubbling cells are shown only in the form of holes, but other forms are contemplated, such as one or more of self-floating valves, fixed valves, mesh openings, pilot mesh openings, and tongue-securing mesh openings.

Here, the extension directions of the settling zone 130 and the bubbling zone 140 of the settling tray 100 are arranged to be transverse to the flow direction of the liquid from the liquid receiving tray 210 to the liquid lowering plate 220, and the bubbling zones are individually diffused when the liquid flows from the liquid receiving tray 210 to the liquid lowering plate 220, and the carried solid matter is settled between the settling zones 130 lower between the bubbling zones 140. In this arrangement, it is not possible for the liquid to flow through the tray deck via the settling zone only, so that no "short-circuiting" of the liquid occurs.

Fig. 2 illustrates another embodiment of the present invention for an in-column assembly within a column, differing from fig. 1 in that the height of the bubble zone 140 of the settling tray 100 is substantially level with the tray plane 120. This design of the settling zone subsidence reduces the height requirements above the tray plane, fully utilizes the height space already occupied by the downcomer and thus utilizes the tray spacing more effectively than the embodiment of the internal column assembly for use in the column shown in fig. 1, and thus enables more trays to be placed in the column, thereby achieving greater throughput.

Fig. 3 illustrates another embodiment of the present invention for an in-column assembly within a column wherein the height of the settling zone 130 of the settling tray 100 is substantially level with the tray plane 120. The extension direction of the settling zone 130 and the bubbling zone 140 of the settling tray 100 is arranged to coincide with the flow direction of the liquid from the liquid receiving tray 210 to the liquid lowering plate 220. At least one blocking element 160 in the form of a baffle, which is adapted to block the continued flow of liquid in the extension direction of the sedimentation zone 130, is arranged in each sedimentation zone 130.

Since the bubbling region is higher than the settling region, the direction of extension of the settling region and bubbling region is again consistent with the direction of flow of liquid from the liquid receiving tray to the liquid reducing plate, during the flow of liquid from the liquid receiving tray 220 to the liquid reducing plate 230, the liquid flows over the bubbling region 140, and since the difference in height between the bubbling region 140 and the settling region 130 is again collected in the settling region 130 and flows along the direction of extension of the settling region 130, the blocking element 160 blocks such flow in the settling region 130 and returns the liquid to the elevated bubbling region 140, and the liquid that has diffused over the bubbling region 140 is again collected in the settling region 130 and possibly is again blocked by the additional blocking element 160 during the forward flow and is again diffused over the bubbling region 140. In this way, the liquid is able to pass continuously through the settling and bubbling zones and eventually to the downcomer. The blocking element 160 acts to prevent liquid from "shorting" through the tray plane via the settling zone.

Fig. 4 illustrates another embodiment of an in-tower assembly for use in a tower. The difference from the embodiment shown in fig. 3 is that the height of the bubble zone 140 of the sedimentation tray 100 is substantially level with the tray plane 120. Similar to the embodiment shown in fig. 2, a design is also employed in which the bubble zone of the settling tray is level with the tray plane, in which design the settling zone is submerged, taking full advantage of the height space already occupied by the downcomer and thus making more efficient use of tray spacing, enabling more trays to be placed within the column, thus achieving greater throughput.

Here, since the extension direction of the settling zone 130 and the bubbling zone 140 of the settling tray 100 is arranged to coincide with the flow direction of the liquid from the liquid receiving tray 210 to the liquid lowering plate 220, at least one blocking element 160 in the form of a baffle plate adapted to block the continued flow of the liquid in the extension direction of the settling zone 130 is also arranged in each settling zone 130, in this embodiment only three rows of blocking elements 160 are shown by way of example, but in variants of this embodiment it is also possible to arrange one, two or more blocking elements, which may be properly selected depending on the gas-liquid phase conditions and the column diameter to be treated in practice.

Fig. 5 illustrates another embodiment of the present invention for an in-tower assembly within a tower. Here, the height of the liquid receiving tray 210 is designed to be lower than the tray plane 120, and since the liquid receiving tray is also capable of depositing and storing a part of solid matter, it is equivalent to increasing the area of the settling zone, thereby extending the operation period.

Fig. 6 illustrates another embodiment of the present invention for an in-tower assembly within a tower. The downcomer plate 220 of the upper tray is designed as a closed bottom but suspended downcomer with openings for liquid to pass through. Here, the liquid receiving tray 210 of the lower tray deck below the liquid falling plate 220 is provided with a bubbling unit, thereby realizing a bubbling area, which corresponds to an increase in the area of the bubbling area.

After passing through the upper tray 210, the liquid enters the settling zone 130 and the bubbling zone 140 of the settling tray 100, then enters the lower tray 210 through the bottom openings of the downcomer 220, and then passes through the settling zone 130 and the bubbling zone 140 of the lower tray 100 and then flows downwards along the downcomer 220.

Fig. 7 illustrates another embodiment of the present invention for an in-tower assembly within a tower. Wherein the liquid receiving tray 210 of the lower layer is disposed under the liquid lowering plate 220 of the center of the upper layer, and liquid passes through a gap between the lower edge of the liquid lowering plate 220 and the liquid receiving tray 210 to enter the tray deck in a horizontal direction after flowing onto the liquid receiving tray 210. After passing through the settling zone 130 and the bubbling zone 140 of the lower settling tray 100, it flows down the liquid-down plates 220 on both sides.

The foregoing describes preferred embodiments of the invention, but the spirit and scope of the invention is not limited to the specific disclosure herein. Those skilled in the art can make any combination and extension of the above embodiments according to the teachings of the present invention to make further embodiments and applications within the spirit and scope of the present invention. The spirit and scope of the present invention are not limited by the specific embodiments, but by the appended claims.

List of reference numerals

Sedimentation tray 100

Tray deck 110

Tray plane 120

Sedimentation zone 130

Bubbling region 140

Bubbling unit 141

Connecting wall 150

Blocking element 160

In-tower assembly 200

Liquid receiving plate 210

A liquid-down plate 220.

Claims

1. A sedimentation tray (100), the sedimentation tray (100) comprising a plurality of tray decks (110), each tray deck (110) being adapted to adjoin a liquid receiving tray (210) on one side and a liquid lowering tray (220) on the other side, each tray deck (110) being arranged side by side to form a tray plane (120),

Characterized in that each tray deck (110) comprises a number of alternately arranged settling zones (130) and bubbling zones (140) and a connecting wall (150) connecting each of the settling zones (130) and bubbling zones (140), the settling zones (130) being designed to receive liquid therethrough and to be impermeable to gas, the bubbling zones (140) being designed to be permeable to gas, and the height of the bubbling zones (140) being higher than the height of the settling zones (130).

2. A settling tray as claimed in claim 1, characterized in that the height of the bubbling zone (140) is flush with the tray plane (120).

3. A settling tray as claimed in claim 1, characterized in that the height of the settling zone (130) is flush with the tray plane (120).

4. A sedimentation tray according to claim 1, characterized in that the structure enclosed by the sedimentation zone (130) and a connecting wall (150) connecting the sedimentation zone (130) and the bubbling zone (140) has a rectangular or trapezoidal cross-sectional shape.

5. A sedimentation tray according to any one of claims 1-4, characterized in that a bubbling unit (141) is arranged in the bubbling zone (140), the bubbling unit (141) being in the form of one or more selected from the group consisting of a float valve, a fixed valve, a sieve mesh.

6. A settling tray as claimed in claim 5, characterized in that the bubbling unit is arranged on a connecting wall (150) connecting the settling zone (130) and bubbling zone (140).

7. An in-tower assembly (200) for use in a tower, the in-tower assembly (200) comprising:

a liquid receiving tray (210), wherein the liquid receiving tray (210) is used for receiving liquid flowing down from above;

-a liquid-down plate (220), the liquid-down plate (220) being adapted to direct a downward flow of liquid, the liquid-down plate (220) having a longitudinal extension arranged in a horizontal direction, both ends being designed to be adapted for direct or indirect fixed connection with the inner wall of the tower;

The in-column assembly (200) further comprising a settling tray (100) as claimed in any one of claims 1 to 6, wherein one side of the settling tray (100) is adjacent to the downcomer plate (220) and the other side is adjacent to the liquid receiving tray (210).

8. The in-column assembly (200) of claim 7, wherein the extension direction of the settling zone (130) and bubbling zone (140) of the settling tray (100) is arranged transverse to the flow direction of liquid from the liquid receiving tray (210) to the liquid dropping plate (220).

9. The in-column assembly (200) according to claim 7, wherein the extension direction of the settling zone (130) and the bubbling zone (140) of the settling tray (100) is arranged to coincide with the flow direction of liquid from the liquid receiving tray (210) to the liquid down-comer plate (220), wherein at least one blocking element (160) adapted to block the continued flow of liquid in the extension direction of the settling zone (130) is arranged in each settling zone (130).

10. The tower inner assembly (200) according to claim 9, wherein said blocking element (160) is in the form of a baffle or a three-dimensional geometry.

11. The in-column assembly (200) according to any one of claims 7 to 10, wherein the downcomer plate (220) is in the form of a closed bottom and open top suspended downcomer, and the tray (210) is formed as a bubbling zone (140) with bubbling units (141).

12. The intratower assembly (200) according to any of claims 7-10, wherein the height of said liquid receiving tray (210) is flush with the tray plane (120).

13. The intratower assembly (200) according to any of claims 7-10, wherein the liquid receiving tray (210) has a height below the tray plane (120).