CN215387647U

CN215387647U - Suspended high-flux downcomer

Info

Publication number: CN215387647U
Application number: CN202121623977.0U
Authority: CN
Inventors: 杨进; 郭康; 聂平建
Original assignee: Nanjing Jiatong Chemical Engineering Co ltd
Current assignee: Nanjing Jiatong Chemical Engineering Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-01-04
Anticipated expiration: 2031-07-16

Abstract

The utility model relates to a suspended high-flux downcomer, which comprises a bottom plate, a liquid separation plate and a liquid receiving plate, wherein the bottom plate and the liquid separation plate are vertically and fixedly arranged, an inclined plate is arranged between the bottom plate and the liquid separation plate, the inclined plate is formed by welding a plurality of plate bodies, the liquid receiving plate is positioned at the bottom of the bottom plate, and the outer edge of the liquid receiving plate is horizontally and fixedly connected with a tower wall of a plate tower. By adopting the inclined downcomer designed by the scheme, the foam layer on the tower tray can slowly flow down along the outer wall of the downcomer after flowing into the downcomer, so that a liquid vortex with high kinetic energy can be prevented from being formed in the downcomer, and therefore, gas can be smoothly separated from liquid and flows upwards and then leaves the downcomer; the liquid can be smoothly separated from the gas at the bottom of the downcomer to obtain complete clarification, so that the circulation capacity of the downcomer can be greatly improved, and the production capacity of the whole tower is improved.

Description

Suspended high-flux downcomer

Technical Field

The utility model relates to the technical field of gas-liquid separation equipment, in particular to a suspended high-flux downcomer.

Background

The plate-type tower is a kind of stepped contact mass transfer equipment for gas-liquid or liquid-liquid system, and is formed from cylindrical tower body and several tower plates which are horizontally placed in the tower according to a certain distance. The method is widely applied to rectification and absorption, and during operation (taking a gas-liquid system as an example), liquid flows through tower plates of each layer from top to bottom in sequence under the action of gravity and is discharged from the bottom of the tower; the gas is driven by pressure difference to pass through each layer of tower plate from bottom to top and is discharged from the top of the tower. A liquid layer with a certain depth is kept on each tower plate, and gas is dispersed into the liquid layer through the tower plates to carry out interphase contact mass transfer.

The downcomer is an important component of the cross-flow plate tower, is a main place for gas-liquid separation in the process of liquid transmission between plates and gas-liquid separation in the transmission process, and provides initial distribution for liquid at the inlet of the plate tower. Therefore, the quality of the downcomer design directly affects the separation effect of the whole plate tower.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a suspended high throughput downcomer to address the problems encountered in the background art discussed above.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the suspended high-flux downcomer comprises a bottom plate, a liquid separation plate and a liquid receiving plate, wherein the bottom plate and the liquid separation plate are vertically and fixedly arranged, an inclined plate is arranged between the bottom plate and the liquid separation plate and is formed by welding a plurality of plate bodies, the liquid receiving plate is located at the bottom of the bottom plate, and the outer edge of the liquid receiving plate is horizontally and fixedly connected with the tower wall of a plate tower.

In the above scheme, the sloping plate is any one of a multi-folded edge, a semi-cone and a semi-arc.

In the above scheme, the peripheral surface of the bottom plate is provided with the diversion trench.

Furthermore, the cross section of guiding gutter is U type structure, the guiding gutter embedded in the outer peripheral face of bottom plate.

In the above scheme, the periphery of the top of the liquid receiving plate is provided with the inlet weir, and the inner side of the inlet weir is provided with the guide plate.

Compared with the prior art, the utility model has the beneficial effects that: by adopting the inclined downcomer designed by the scheme, the foam layer on the tower tray can slowly flow down along the outer wall of the downcomer after flowing into the downcomer, so that a liquid vortex with high kinetic energy can be prevented from being formed in the downcomer, and therefore, gas can be smoothly separated from liquid and flows upwards and then leaves the downcomer; the liquid can be smoothly separated from the gas at the bottom of the downcomer to obtain complete clarification, so that the circulation capacity of the downcomer can be greatly improved, and the production capacity of the whole tower is improved.

Drawings

The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the utility model. In the drawings, like reference numerals are used to refer to like parts. Wherein:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the upper assembly of a downcomer according to the present invention;

FIG. 3 is a schematic view of the structure of the lower assembly of the downcomer of the present invention;

FIG. 4 is a schematic structural view in example 1 of the present invention;

reference numbers in the figures: 1-a bottom plate; 2-liquid separation plate; 3-sloping plate; 4-a diversion trench; 5-liquid receiving plate; 6-a deflector; 7-a tower wall; 8-inlet weir.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described in detail with reference to the attached drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution to which the present invention relates.

According to the technical scheme of the utility model, a plurality of alternative structural modes and implementation modes can be provided by a person with ordinary skill in the art without changing the essential spirit of the utility model. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and examples.

Embodiment 1, as shown in fig. 1 to 4, a suspended high-flux downcomer comprises a bottom plate 1, a liquid separation plate 2 and a liquid receiving plate 6, wherein the bottom plate 1 and the liquid separation plate 2 are vertically welded and fixed, an inclined plate 3 is arranged between the bottom plate 1 and the liquid separation plate 2, and the inclined plate 3 is formed by welding a plurality of plate bodies. The sloping plate 3 is any one of a multi-folded edge structure, a semi-conical structure and a semi-arc structure, fig. 2 is a semi-conical structure, the multi-folded edge structure is similar to the semi-conical structure, but too many plate bodies are not separated, and the semi-arc structure is smoother in appearance compared with the semi-conical structure. After the inclined plate 3 is adopted in the downcomer, the gas and liquid circulation capacity is high, and foaming can be effectively inhibited in a foaming system.

In the original plate tower, the foam layer with large vapor phase on the tray enters a free falling state with high speed after flowing into the vertical downcomer, and the liquid is easy to form vortex at the bottom of the downcomer due to high speed and large kinetic energy. The high kinetic energy vortex greatly prevents the vapor which is about to leave the liquid from flowing upwards, so that the liquid in the downcomer cannot be clarified from a foam state, and the downcomer quickly reaches a flooding state.

According to the inclined downcomer designed by the scheme, the foam layer on the tower tray can slowly flow down along the outer wall of the downcomer after flowing into the downcomer, so that a liquid vortex with high kinetic energy can be prevented from being formed in the downcomer, and therefore gas can be smoothly separated from liquid and flows upwards and then leaves the downcomer; the liquid can be smoothly separated from the gas at the bottom of the downcomer to obtain complete clarification, so that the circulation capacity of the downcomer can be greatly improved, and the production capacity of the whole tower is improved.

This is as if the beer were poured into a glass, with little beer in the glass if the glass is held upright and the beer is run straight down, and with little or no foam if the glass is tilted properly to allow the beer to run down the glass walls, the cup is essentially filled with beer liquid.

The liquid receiving plate 6 is positioned at the bottom of the bottom plate 1, and the outer edge of the liquid receiving plate 6 is horizontally welded and fixedly connected with the tower wall 7 of the plate tower. Preferably, an inlet weir 8 is provided on the top periphery of the liquid receiving plate 6, and a baffle plate 6 is provided inside the inlet weir 8. The flow of liquid is improved through the flow guide structure, and the flow capacity of the downcomer is further improved.

Referring to fig. 4, the liquid separation plate 2 is installed in the plate tower by screws, and the inclined plate 3 is disposed at the bottom of the liquid separation plate 2 to form a suspended downcomer structure, so that an independent liquid receiving area is not designed on the whole, and an active area is increased, thereby improving gas phase processing capacity.

The upper part of the plate tower adopts a multi-fold edge liquid descending pipe to form a minimum liquid receiving area, and the guide plates are arranged at corresponding positions, so that the initial distribution of liquid flow is greatly improved, and the liquid flow on the plate tower is close to plug flow. The liquid phase passes through the inlet weir 8 and is then guided by the guide plate 6.

Example 2, as shown in fig. 1 to 3, is different from example 1 in that: the peripheral surface of the bottom plate 1 is provided with a diversion trench 4, and the foaming phenomenon is reduced through the diversion trench 4.

Furthermore, the cross section of the diversion trench 4 is of a U-shaped structure, and the diversion trench 4 is embedded in the outer peripheral surface of the bottom plate 1, so that liquid can flow downwards from the top of the U-shaped structure of the diversion trench 4 to enter the liquid receiving plate 6. The newly designed flow guide structure improves the liquid flow, eliminates a liquid phase flow dead zone, enables the liquid phase flow on the column plate to be close to plug flow, also enables the column plate to have stronger self-cleaning performance, and is suitable for the separation of medium containing solid phase, easy self-aggregation and viscous medium.

In the liquid phase flow of the common suspended downcomer, the liquid phase falls to easily cause splashing, and simultaneously, the liquid flow at the moment is diffusion flow, which can cause the problem of poor vapor-liquid contact caused by uneven liquid phase flow. In the liquid phase flow of the existing design scheme, the liquid phase crosses the liquid separation plate 2 and slowly enters the semi-conical downcomer, the liquid falls from the opening area of the diversion trench 4 close to the tower wall 7, the splash-proof baffle (namely the two side plates of the diversion trench 4) is designed under the opening area, the liquid enters the inlet weir 8 after passing through the splash-proof baffle, the liquid phase crosses the inlet weir 8, a certain number of diversion plates 6 are introduced, and the design plays roles of splash prevention and diversion.

In conclusion, the above measures enhance the vapor-liquid phase circulation capacity of the tower plate, and simultaneously improve the production capacity of the whole tower by improving the vapor-liquid phase flow mode.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A suspended high throughput downcomer, comprising: including bottom plate (1), liquid trap (2) and connect liquid trap (5), bottom plate (1) and liquid trap (2) vertical fixation set up, be equipped with swash plate (3) between bottom plate (1) and liquid trap (2), swash plate (3) adopt the welding of polylith plate body to form, connect liquid trap (5) to be located the bottom of bottom plate (1), connect the outer border of liquid trap (5) and the horizontal fixed connection of tower wall (7) of plate tower.

2. A suspended high throughput downcomer according to claim 1 wherein: the inclined plate (3) is any one of a multi-folded edge, a semi-cone shape and a semi-arc shape.

3. A suspended high throughput downcomer according to claim 1 wherein: the peripheral surface of the bottom plate (1) is provided with a diversion trench (4).

4. A suspended high throughput downcomer according to claim 3 wherein: the cross section of guiding gutter (4) is U type structure, guiding gutter (4) are embedded in the outer peripheral face of bottom plate (1).

5. A suspended high throughput downcomer according to claim 1 wherein: the top periphery of liquid receiving plate (5) is equipped with entry weir (8), the inboard of entry weir (8) is equipped with guide plate (6).