CN110711401A

CN110711401A - Plate-type reaction rectifying tower

Info

Publication number: CN110711401A
Application number: CN201911188375.4A
Authority: CN
Inventors: 叶长燊; 程激如; 邱挺; 王清莲; 韩俏飞; 杨臣; 王晓达; 王红星; 李玲; 黄智贤
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-01-21

Abstract

The invention provides a plate-type reaction rectifying tower which comprises a tower body, wherein a condenser is arranged on the upper side of the tower body, a reboiler is arranged on the lower side of the tower body, a plurality of tower plates are arranged in the tower body from top to bottom, adjacent tower plates are reversely arranged, one side of each tower plate is fixed in the tower body, the other side of each tower plate is provided with an overflow weir, the lower part of each overflow weir is provided with a downcomer, and regular catalytic elements are filled in the downcomers. The invention has simple structure, reasonable design, easy maintenance, full contact between the catalyst and the liquid, high utilization rate of the catalyst, no influence of catalytic elements on vapor-liquid flow and mass transfer performance on the tower plate, and is very convenient for transforming and upgrading the existing common plate-type rectifying tower into a reaction rectifying tower, thereby having practicability and innovation.

Description

Plate-type reaction rectifying tower

Technical Field

The invention relates to a plate-type reaction rectifying tower.

Background

The reaction rectifying tower is a tower type device integrating reaction and rectification, and reactants and products are separated by a rectification method to destroy the balance of reversible reaction, so that the reaction is continuously carried out in the direction of generating the products, and the conversion rate and the selectivity of the reversible reaction are improved. In addition, the vapor-liquid equilibrium relation can be broken through chemical reaction in the reactive distillation process, the mass transfer rate is accelerated, and the reaction time is shortened. The reaction rectifying tower structure type under the prior art is single, mostly is packing type reaction rectifying tower, and its catalyst fills with catalytic element's form in the tower more, and the porosity distributes unevenly in the catalytic element leads to vapour-liquid to distribute inhomogeneous, and when liquid flows through the catalytic element surface, liquid is great to the inside mass transfer resistance of catalytic package, and the utilization ratio of the inside catalyst of catalytic package is low. The traditional plate-type reaction rectifying tower is provided with a catalyst on the upper part or the lower part of the tower plate, so that the flow and mass transfer performance of vapor and liquid on the tower plate are easy to damage, and the rectification separation is not facilitated.

Disclosure of Invention

The invention improves the problems, namely the technical problem to be solved by the invention is to provide a plate-type reaction rectifying tower which is convenient to use and high in catalyst utilization rate.

The specific embodiment of the invention is as follows: the utility model provides a plate-type reaction rectifying column, including the tower body, the tower body upside is provided with the condenser, the tower body downside is provided with the reboiler, the inside a plurality of column plate that is provided with from top to bottom of tower body, adjacent column plate reverse setting, column plate one side is fixed inside the tower body, and the column plate opposite side is provided with the overflow weir, the overflow weir lower part is equipped with the downcomer, be filled with the regular catalytic element of a plurality of on the downcomer.

Further, the catalyst element is formed into a regular cuboid by clamping the catalyst in the middle through wire mesh corrugated packing, the thickness D of the catalyst element is 5mm ~ 30mm, and the height H of the catalyst element is 50mm ~ 150 mm.

Furthermore, a catalyst bracket for fixedly placing the catalytic element is arranged on the downcomer.

Compared with the prior art, the invention has the following beneficial effects: the plate-type reaction rectifying tower has the advantages of simple structure and reasonable design, is convenient to install and use, is easy to maintain, is full in contact between a catalyst and liquid, is high in catalyst utilization rate, is free from the influence of a catalytic element on vapor-liquid flow and mass transfer performance on the tower plate, can be fully contacted between the catalyst and the liquid by arranging the catalytic element in the downcomer, is high in catalyst utilization rate, has wide industrial popularization and application prospects, and is very convenient to modify and upgrade the conventional common plate-type rectifying tower into the reaction rectifying tower.

Drawings

FIG. 1 is a schematic structural diagram of a plate-type reactive distillation column according to an embodiment of the present invention;

FIG. 2 is a front view of a plate catalytic element according to an embodiment of the present invention;

FIG. 3 is a side view of a plate catalytic element according to an embodiment of the present invention;

FIG. 4 is a top view of a plate catalytic element according to an embodiment of the present invention;

FIG. 5 is an elevation view of a reaction section tray and downcomer according to an embodiment of the present invention;

FIG. 6 is a side view of a reaction section tray and downcomer according to an embodiment of the present invention;

FIG. 7 is a top view of a reaction section tray and downcomer according to an embodiment of the present invention;

FIG. 8 is an elevation view of a catalytic element of an embodiment of the invention packed in a downcomer in cooperation with a catalyst support;

FIG. 9 is a side view of a catalytic element of an embodiment of the invention packed in a downcomer in cooperation with a catalyst support;

FIG. 10 is a top view of a catalytic element of an embodiment of the invention packed in a downcomer in cooperation with a catalyst support;

FIG. 11 is a front view of a catalyst support according to an embodiment of the present invention;

FIG. 12 is a side view of a catalyst support according to an embodiment of the present invention;

FIG. 13 is a top view of a catalyst support according to an embodiment of the present invention.

In the figure: 1-reboiler, 2-tower, 3-downcomer, 4-catalytic element, 5-overflow weir, 6-tower plate, 7-condenser, 8-catalyst, 9-wire mesh corrugated filler, and 10-catalyst support.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiment provides a plate-type reaction rectifying tower as shown in fig. 1 ~ 13, which comprises a tower body 2, wherein a condenser 7 is arranged on the upper side of the tower body 2, a reboiler 1 is arranged on the lower side of the tower body, a plurality of tower plates 6 are arranged in the tower body from top to bottom, adjacent tower plates 6 are reversely arranged, one side of each tower plate is fixed in the tower body, an overflow weir 5 is arranged on the other side of each tower plate, a downcomer 3 is arranged on the lower portion of each overflow weir, a plurality of regular catalytic elements 4 are filled on the side portion of each downcomer, adjacent tower plates are transversely and horizontally arranged, a downcomer is arranged at the left end of one tower plate, and a downcomer is arranged at the right end of the other tower plate.

In the embodiment, the trays can be divided into rectifying section trays, reaction section trays and stripping section trays, wherein catalytic elements 4 are arranged in a downcomer of the reaction section trays, two rows of catalytic elements can be arranged on the downcomer, a first row of elements positioned above the downcomer is staggered with a second row of elements positioned below the downcomer, the two rows of catalytic elements are positioned between the current tray and the lower tray, the first row of catalytic elements is filled at the position of the downcomer and is 90mm lower than the current tray, the second row of catalytic elements is 80mm higher than the lower tray, the interval between the same rows of catalytic elements is 20mm ~ 80mm, preferably 30mm, and the interval between the first row of catalytic elements and the second row of catalytic elements is 20mm ~ 100mm, preferably 40 mm.

In this embodiment, when the distance between the trays is 450mm, and the height of the overflow weir is 40mm, the catalyst element 4 may adopt a wire mesh corrugated packing 9 to sandwich the catalyst 8 between the wire mesh corrugated packing to form a regular cuboid, the thickness D of the catalyst element is 5mm ~ 30mm, the thickness D of the catalyst element is preferably 10mm, the height H of the catalyst element is 50mm ~ 150mm, the height H of the catalyst element is preferably 120mm, and the length L of the catalyst element may be determined according to the cross-sectional size of the downcomer.

In this embodiment, the downcomer 3 is provided with a catalyst support 10 for fixedly placing catalytic elements, each catalytic element being embedded in the catalyst support.

In this embodiment, the cross section of the catalyst support 10 is a right trapezoid, and a holding space for holding a catalytic element is defined by the bottom and two sides of the catalyst support.

In the embodiment, when the device is installed, regular catalytic elements are installed in the downcomer, so that the normal flow of vapor-liquid two phases on the tower plate can be ensured, good mass transfer performance is ensured, meanwhile, the catalytic elements are arranged in the downcomer, so that the catalyst can be fully contacted with the liquid, and the utilization rate of the catalyst is high; the plate-type reaction rectifying tower is convenient to install and use and easy to maintain, vapor-liquid flow and mass transfer performance on the tower plate are not influenced by catalytic elements, and the conventional common plate-type rectifying tower is very convenient to modify and upgrade into the reaction rectifying tower.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims

1. The utility model provides a plate-type reaction rectifying column, includes the tower body, the tower body upside is provided with the condenser, the tower body downside is provided with the reboiler, a serial communication port, the inside a plurality of column plate that is provided with from top to bottom of tower body, adjacent column plate reverse setting, column plate one side is fixed inside the tower body, and the column plate opposite side is provided with the overflow weir, the overflow weir lower part is equipped with the downcomer, the downcomer is filled with the regular catalytic element of a plurality of.

2. A plate-type reactive distillation column as claimed in claim 1, wherein said catalytic element is a regular rectangular parallelepiped formed by sandwiching the catalyst by wire mesh corrugated packing, said catalytic element has a thickness D of 5mm ~ 30mm and a height H of 50mm ~ 150 mm.

3. The plate-type reactive distillation column of claim 1, wherein the downcomer is provided with a catalyst support for fixedly placing the catalytic element.