CN204428869U - A kind of liquid distribution device - Google Patents

Abstract

The utility model provides a liquid distribution device, which includes a mother liquid distribution pipe and several sub-liquid distribution pipes, the mother liquid distribution pipe is a semi-through pipe structure with an open upper end and a closed bottom end, and the sub-liquid distribution pipes are special-shaped pipes , one end of which is embedded in the bottom of the mother liquid pipe and protrudes upward from the bottom plate of the mother liquid pipe, and the other end extends radially downward relative to the mother liquid pipe, and the liquid inlet hole is opened on the side wall of the mother liquid pipe , The upper end of the side wall of the sub liquid distribution pipe is provided with a number of liquid discharge orifices. The utility model changes the liquid distribution method of the secondary tank of the existing trough distributor, and increases the liquid distribution point of the distributor through the combination of the mother liquid distribution pipe and several sub-liquid distribution pipes, thereby improving the operating flexibility of the existing distributor. The uniformity of liquid distribution and the density of liquid distribution points; thereby improving the efficiency of existing packed towers or reactors, reducing energy consumption, and improving product yield and purity; and the structural characteristics and installation methods of this device make it easy to disassemble Installation and maintenance cleaning.

Description

A liquid distribution device

technical field

The invention relates to a device for improving the effect of liquid distribution in a chemical mass transfer separation and reactor, specifically a liquid distribution device capable of secondary distribution of liquid.

Background technique

Distributor is a kind of tower internals that is very important for the efficiency of packed tower in the rectification system. The operating flexibility, liquid distribution uniformity and liquid distribution point density of the distributor are three important indicators to measure its performance. The higher the separation efficiency of the filler, the more difficult it is for the liquid to diffuse and distribute uniformly, and the higher the performance requirements for the distributor. For the working condition of large liquid flow per unit area and unit time, the wetting of packing and liquid flow distribution are generally not a problem, but for the opposite situation, existing distributors are difficult to solve, especially if the spray density is less than 0.5m ³ / In the operating condition of m ² ·h, it is difficult for traditional distributors to achieve uniform distribution of liquid.

The wetting effect of the filler directly affects the efficiency of the filler. If the filler is in a dry state, the gas-liquid has no heat transfer and mass transfer effects. Among the most commonly used distributors at present, the trough and groove-disk distributors are more commonly used. The distributor ejects the liquid from the side hole of the secondary tank, and then deflects and splashes it onto the filler through the liquid baffle. According to the law of fluid flow, the number of liquid distribution points is basically equal to the number of openings on the side wall of the secondary tank. The number of distribution points is limited. The trough distributor has liquid flow holes on the side wall of the gas riser, and angle steel baffles are arranged at the liquid flow holes. The number of liquid distribution points and the number of angle steel baffles are basically the same, and the number of liquid distribution points is affected by the size of the angle steel baffles and The limitation of the liquid baffle cannot further improve the quality and uniformity of liquid distribution.

The improvement of rectification and absorption efficiency helps energy saving and emission reduction, and improves product quality. Regardless of the liquid distribution of large flow rate or small flow rate, the uniformity of liquid distribution and the number of liquid distribution points are very important, and more Good technical means improve the distribution uniformity of the distributor and the density of liquid distribution points, but the current technical means cannot meet this requirement.

Contents of the invention

The problem to be solved by the invention is to provide a multi-point evenly distributed liquid distribution device.

In order to solve the problems of the technologies described above, the technical solution adopted by the present invention is:

A liquid distribution device, comprising a mother liquid distribution pipe and several sub-liquid distribution pipes, the mother liquid distribution pipe is a semi-through pipe structure with an open upper end and a closed bottom end, and the sub-liquid distribution pipe is a special-shaped pipe, one end of which is embedded The bottom end of the mother liquid pipe protrudes upwards from the bottom plate of the mother liquid pipe, and the other end extends radially downward relative to the mother liquid pipe. There is a liquid inlet hole on the side wall of the mother liquid pipe. The upper end of the side wall of the liquid distribution pipe is provided with a number of liquid discharge orifices.

The sub liquid distribution pipe is an "S" shaped tubular structure.

The sub-liquid distribution pipe is divided into an upper pipe section, a middle pipe section and a lower pipe section, each pipe section has a circular arc transition, and the entire sub-liquid distribution pipe is integrally formed, and the upper pipe section and the lower pipe section of the sub-liquid distribution pipe are both vertical pipe, the intermediate pipe section is a horizontal pipe or an inclined pipe, and the inclination angle of the inclined pipe is 15-75°.

The upper end of the sub liquid distribution pipe is obliquely opened.

A number of drainage holes are opened on the side wall of the sub-distribution pipe at a distance of 5mm from the opening.

The number of the sub liquid distribution pipes is 3-7.

There are 1-3 rows of liquid inlet holes on the side wall of the mother cloth liquid pipe, and the number of liquid inlet holes in each row is 1-4, and the distance between the uppermost row of liquid inlet holes and the upper nozzle of the mother cloth liquid pipe is about 5-15mm.

The shape of the liquid flow hole and the liquid inlet hole can be designed as one of a round hole, an oval hole, a triangular hole or a square hole.

The advantages and positive effects of the invention are: the invention changes the liquid distribution method of the secondary tank of the existing trough distributor, and increases the liquid distribution point of the distributor through the combination of the main liquid distribution pipe and several sub-liquid distribution pipes , thus improving the operating flexibility, liquid distribution uniformity and liquid distribution point density of the existing distributor; this device can also be directly installed on the liquid accumulation plate (trough) and used as a liquid distributor to increase the liquid distribution point by 1-3 times , and then improve the efficiency of the existing packed tower or reactor, reduce energy consumption, and increase product yield and purity; and the structural characteristics and installation method of the device make the device easy to disassemble, repair and clean.

Description of drawings

Fig. 1 is a structural representation of an embodiment of the present invention;

Fig. 2 is a top view of an embodiment of the invention;

Fig. 3 is the sectional view of the A-A section in Fig. 2 that the present invention creates;

Fig. 4 is a top view of the invention in use in a trough distributor;

Fig. 5 is a sectional view of the B-B section in Fig. 4 of the present invention.

Detailed ways

The invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1-3, the invention discloses a liquid distribution device, which includes a mother liquid distribution pipe 1 and several sub liquid distribution pipes 2, wherein the mother liquid distribution pipe 1 is a half-through pipe with an open upper end and a closed bottom end Structure, 1-3 rows of liquid inlet holes 3 are opened on the side wall of the mother cloth liquid pipe, the number of liquid inlet holes 3 in each row is 1-4, the distance between the uppermost row of liquid inlet holes and the upper nozzle is about 5-15mm, The liquid distribution pipe 2 is a special-shaped pipe with an oblique opening on its upper end. Several sub-liquid distribution pipes 2 are evenly arranged into a group (preferably 3 to 7 sub-liquid distribution pipes), and one end of the above-mentioned sub-liquid distribution pipes 2 is embedded in the bottom end of the mother liquid distribution pipe 1 and protrudes upward from the mother liquid distribution pipe 1 The other end of the bottom plate extends radially downward relative to the mother distribution liquid pipe 1 . The side wall of the sub-distributing liquid pipe 2 is provided with a number of discharge orifices 4 at 5-10 mm from the opening.

The above-mentioned sub-liquid distribution pipe 2 can be designed as an "S"-shaped tubular structure, which can be specifically designed to be divided into an upper pipe section, a middle pipe section and a lower pipe section. The upper pipe section and the lower pipe section of the liquid distribution pipe 2 are vertical pipes, the middle pipe section is a horizontal pipe or an inclined pipe, and the inclination angle of the inclined pipe is 15-75 degrees.

The shape of the liquid flow hole 4 and the liquid inlet hole 3 can be designed as one of a round hole, an oval hole, a triangular hole or a square hole.

As shown in Figures 4 and 5, the liquid distribution device created by the present invention can be installed at the bottom of the secondary tank of the trough-type liquid distributor, or evenly distributed on the horizontal plate of the trough-distributor, or the side of the air riser In order to increase the operating flexibility, liquid distribution uniformity and liquid distribution point density of the entire liquid distributor; and the device can be easily disassembled, repaired and cleaned.

During actual use, the liquid flows into the lumen from the side wall of the main liquid distribution pipe 1 by liquid pressure, and part of it falls into the bottom of the pipe to form a certain level of liquid in the lumen. The liquid flow hole 4 on the side wall of 2 flows into the sub-liquid distribution pipe 2, and then flows out from the lower end of the sub-liquid distribution pipe 2 through the sub-liquid distribution pipe 2; the other part is equally divided by the oblique opening at the upper end of the sub-liquid distribution pipe 2 during the random falling process , directly flows into the sub-distribution liquid pipe 2, and flows to the lower end of the sub-distribution liquid pipe 2 by gravity and liquid level difference.

The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equal changes and improvements made according to the creative scope of the present invention should still belong to the scope covered by this patent.

Claims (8)

1. A liquid distribution device, characterized in that: it comprises a mother liquid distribution pipe (1) and several sub liquid distribution pipes (2), and said mother liquid distribution pipe (1) is a semi-through pipe with an open upper end and a closed bottom end structure, the sub-distribution pipe (2) is a special-shaped pipe, one end of which is embedded in the bottom of the mother liquid pipe (1) and protrudes upward from the bottom plate of the mother liquid pipe (1), and the other end is opposite to the mother liquid pipe (1). The pipe (1) extends radially downwards, the side wall of the mother liquid distribution pipe (1) is provided with a liquid inlet hole (3), and the upper end of the side wall of the sub liquid distribution pipe (2) is provided with a number of discharge holes Orifice (4). 2. The liquid distribution device according to claim 1, characterized in that: the sub liquid distribution pipe is an "S" shaped tubular structure. 3. The liquid distribution device according to claim 1, characterized in that: the sub-liquid distribution pipe (2) is divided into an upper pipe section, a middle pipe section and a lower pipe section, each pipe section has a circular arc transition, and the entire sub-liquid distribution pipe (2) It is integrally formed, and the upper pipe section and the lower pipe section of the sub-liquid distribution pipe (2) are both vertical pipes, and the middle pipe section is a horizontal pipe or an inclined pipe, and the inclined angle of the inclined pipe is 15-75°. 4. The liquid distribution device according to claim 1, characterized in that: the upper end of the sub liquid distribution pipe (2) has an oblique opening. 5. The liquid distribution device according to claim 1, characterized in that: the side wall of the sub liquid distribution pipe (2) is provided with several liquid drainage holes (4) at a distance of 5 mm from the opening. 6. The liquid distribution device according to claim 1, characterized in that the number of said sub liquid distribution pipes (2) is 3-7. 7. The liquid distribution device according to claim 1, characterized in that: 1-3 rows of liquid inlet holes (3) are opened on the side wall of the mother cloth liquid pipe, and the number of liquid inlet holes (3) in each row is 1-4 pieces. 8. The liquid distribution device according to claim 5 or 7, characterized in that: the shape of the liquid flow hole (4) and the liquid inlet hole (3) can be designed as a round hole, an oval hole, a triangular hole or a square hole One of.