CN215352056U

CN215352056U - Novel still extraction device of rectifying tower for continuous rectification

Info

Publication number: CN215352056U
Application number: CN202120912496.5U
Authority: CN
Inventors: 张典华; 曹明磊
Original assignee: Shandong Ruijie New Material Co ltd
Current assignee: Shandong Ruijie New Material Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-12-31
Anticipated expiration: 2031-04-29

Abstract

The utility model provides a novel rectifying tower kettle extraction device for continuous rectification, which comprises a rectifying tower kettle, a reboiler, a connecting pipeline, a circulating pipeline, a tower kettle extraction pipeline, a side line extraction pipeline and an extraction pump, wherein valves are arranged at the output end of the rectifying tower kettle and the output end of the reboiler, flow control assemblies are arranged at the bottom of the rectifying tower kettle and the bottom of the reboiler, each flow control assembly comprises a fixed valve block, the fixed valve blocks are connected with the inside of the rectifying tower kettle through a circular ring, rotary valve blocks movably matched with the fixed valve blocks are arranged below the fixed valve blocks, a driving mechanism is arranged at the bottom of each rotary valve block, a support shell is arranged at the bottom of the driving mechanism, a plurality of discharge holes distributed in a radial shape are arranged on the side surface of the support shell, and a drainage cone is arranged at the center of the inside of the support shell. According to the utility model, the two flow control assemblies are added to respectively collect solid particles in the tower kettle of the rectifying tower and the reboiler, so that the flow control efficiency is high, and the loss of a rectifying product is less.

Description

Novel still extraction device of rectifying tower for continuous rectification

Technical Field

The utility model belongs to the technical field of chemical equipment, and particularly relates to a novel extraction device for a tower kettle of a rectifying tower for continuous rectification.

Background

The rectifying tower is a separation device which separates components by utilizing different volatility of the components in a mixture. The feed liquid is added from the middle part of the tower, and the tower section above the feed inlet further thickens the volatile component in the rising steam, which is called as a rectifying section; the section of the column below the feed opening, which extracts the volatile components from the descending liquid, is referred to as the stripping section. The continuous rectifying tower is generally combined with a reboiler for use, a liquid phase discharge port of a tower kettle of the continuous rectifying tower is used as a main extraction port, and a liquid phase discharge port of the reboiler is used as a side extraction port. Because a small amount of solid particles or solid precipitation occurs after solvent evaporation in the continuous rectification process, in order to not affect the extraction efficiency of the distillate, a reasonable flow control means is usually performed before a liquid-phase product is continuously extracted, so as to reduce the content of the solid particles in the product.

The prior patent technology CN201420058456.9 discloses a novel rectifying tower kettle extraction device for continuous rectification, which comprises a rectifying tower kettle, a reboiler and a connecting pipeline, wherein the side wall of the lower end of the reboiler is also provided with a side extraction pipeline which is connected with the tower kettle extraction pipeline; a material extraction pump for assisting material discharge is arranged on the extraction pipeline of the tower kettle; the side draw pipeline is provided with a manual regulating valve. The device reduces the content of solid particles in the lower tube box of the reboiler, reduces the possibility of blocking the heat exchange tube by the solid particles, reduces the maintenance frequency of the reboiler, and prolongs the service life of the reboiler; the tower kettle extraction pipeline is connected with the reboiler side extraction pipeline, so that dead angles of the extraction pipeline are reduced, the equipment efficiency is improved, and the equipment operation difficulty is reduced. However, in the flow control process, the solid particles in the tower bottom and the reboiler are influenced by pressure to expand the distribution range, so that the flow control skill of an operator is required to be high, and a large amount of liquid phase products mixed with the solid particles are brought out, so that the actual yield is influenced, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems of the rectifying tower kettle extraction device, the utility model provides a novel rectifying tower kettle extraction device for continuous rectification, which has the advantages of reasonable design, simple structure, convenience in flow control and contribution to yield improvement.

In order to achieve the above purpose, the technical scheme adopted by the utility model is that the novel rectifying tower kettle extraction device for continuous rectification comprises a rectifying tower kettle and a reboiler, the rectifying tower kettle and the reboiler are connected through a connecting pipeline and a circulating pipeline, a kettle extraction pipeline is arranged at the liquid phase output end of the rectifying tower kettle, a side line extraction pipeline is arranged at the liquid phase output end of the reboiler, an extraction pump is arranged on the kettle extraction pipeline, valves are arranged at the output end of the rectifying tower kettle and the output end of the reboiler, flow control assemblies are arranged at the bottom of the rectifying tower kettle and the bottom of the reboiler, each flow control assembly comprises a fixed valve plate, the fixed valve plates are connected with the inside of the rectifying tower kettle through a circular ring, and a plurality of fixed valve ports distributed in a circular array are arranged at the edges of the fixed valve plates, the improved rotary valve is characterized in that a rotary valve plate is movably matched with the fixed valve plate, a plurality of rotary valve ports distributed in a circular array are arranged at the edge of the rotary valve plate, a driving mechanism is arranged at the bottom of the rotary valve plate, a supporting shell is arranged at the bottom of the driving mechanism, a plurality of discharging holes distributed radially are formed in the side face of the supporting shell, and an inverted drainage cone is arranged at the center of the inner portion of the supporting shell.

Preferably, the top surface and the bottom surface of the fixed valve plate are spherical surfaces, and the top surface and the bottom surface of the rotary valve plate are spherical surfaces.

Preferably, a protective shell is arranged at the center of the bottom surface of the rotary valve plate, and the driving mechanism is arranged inside the protective shell.

Preferably, the side surface of the support shell is a tapered surface.

Preferably, the driving mechanism comprises a speed reducing motor, a central gear shaft is arranged at the output end of the speed reducing motor, a transition gear meshed with the central gear shaft is arranged at the output end of the central gear shaft, an internal gear meshed with the transition gear is arranged at the output end of the transition gear, and the internal gear is arranged at the center of the rotary valve plate.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the novel continuous rectification tower kettle extraction device, the two flow control assemblies are added to collect solid particles in the rectifying tower kettle and the reboiler respectively, so that the flow control efficiency is improved, and the loss of rectification products is reduced. The utility model has the advantages of reasonable design, simple structure, strong practicability, high utilization rate and suitability for large-scale popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a schematic structural diagram of a tower bottom extraction device of a novel rectification tower for continuous rectification provided by an embodiment;

FIG. 2 is a cross-sectional view of a flow control assembly according to an embodiment;

FIG. 3 is an isometric view of a flow control assembly provided by an embodiment;

FIG. 4 is an isometric view of a flow control assembly (without a fixed valve plate) according to an embodiment;

FIG. 5 is a top view of the flow control assembly (without the fixed valve plate) according to an embodiment;

in the above figures, 1, a rectifying tower kettle; 2. a reboiler; 3. connecting a pipeline; 4. a circulation pipe; 5. A tower kettle extraction pipeline; 6. a side draw line; 7. a production pump; 8. a valve; 9. a flow control assembly; 91. Fixing the valve plate; 911. a fixed valve port; 92. rotating the valve plate; 921. rotating the valve port; 922. a protective shell; 93. a drive mechanism; 931. a reduction motor; 932. a central gear shaft; 933. a transition gear; 934. An internal gear; 94. a circular ring; 95. a support housing; 951. a discharge hole; 952. and (4) a drainage cone.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

In an embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the novel rectifying tower kettle extraction device for continuous rectification provided by the present invention includes a rectifying tower kettle 1 and a reboiler 2, the rectifying tower kettle 1 and the reboiler 2 are connected by a connecting pipeline 3 and a circulating pipeline 4, a tower kettle extraction pipeline 5 is provided at a liquid phase output end of the rectifying tower kettle 1, a side line extraction pipeline 6 is provided at a liquid phase output end of the reboiler 2, and an extraction pump 7 is provided on the tower kettle extraction pipeline 5. Wherein, rectifying column tower cauldron 1, reboiler 2, connecting tube 3, circulating line 4, tower cauldron extraction pipeline 5, side draw pipeline 6 and extraction pump 7 are current mature technology, and this embodiment is no longer repeated herein. The key point of the utility model is that a flow control component 9 is added in the rectifying tower kettle 1 and the reboiler 2, and a valve 8 is reasonably arranged according to the flow control requirement, so as to improve the overall flow control effect of the device.

Specifically, the output end of a rectifying tower kettle and the output end of a reboiler are both provided with a valve 8, the bottom of the rectifying tower kettle 1 and the bottom of the reboiler 2 are both provided with a flow control assembly 9, the flow control assembly 9 comprises a fixed valve plate 91, the fixed valve plate 91 is connected with the inside of the rectifying tower kettle 1 through a ring 94, the edge of the fixed valve plate 91 is provided with a plurality of fixed valve ports 911 distributed in a circular array, a rotary valve plate 92 movably matched with the fixed valve plate 91 is arranged below the fixed valve plate 91, the edge of the rotary valve plate 92 is provided with a plurality of rotary valve ports 921 distributed in a circular array, the bottom of the rotary valve plate 921 is provided with a driving mechanism 93, the bottom of the driving mechanism 93 is provided with a support shell 95, the side surface of the support shell 95 is provided with a plurality of radially distributed discharge holes 951, and an inverted drainage cone 952 is arranged at the center inside of the support shell 95. In the device, the driving mechanism 93 is used for driving the rotary valve plate 92, so that the rotary valve port 921 on the rotary valve plate 92 corresponds to the fixed valve port 911 on the fixed valve plate 91, so that the solid particles in the rectifying tower kettle 1 or the solid particles in the reboiler 2 enter the corresponding flow control assembly 9, namely, between the rotary valve plate 92 and the support shell 95; by opening the corresponding valve 8 and driving the flow control assembly 9 to completely close or partially close the fixed valve port and the rotary valve port, in this way, solid particles in the flow control assembly 9 can pass through the upper discharge hole 951 of the support shell and enter the tower kettle extraction pipeline 5 or the lateral line extraction pipeline 6, so that enough solid particles are pumped out in a short time in the flow control process, the flow control time is effectively shortened, the flow control efficiency is improved, and only a small amount of rectification products are pumped out along with the solid particles, thereby reducing the waste of raw materials and lowering the production cost. The drainage cone 952 of the device in the support shell 95 can play a role in drainage, so that the phenomenon that solid particles are bridged at a discharge port of a tower bottom of a rectifying tower is avoided, and the smoothness of a flow control process is ensured.

In order to improve the effect of solid particles entering the flow control assembly 9, the top surface and the bottom surface of the fixed valve plate 91 provided by the utility model are spherical surfaces, and the top surface and the bottom surface of the rotary valve plate 92 are spherical surfaces, so that the solid particles can move along the design of the spherical surfaces after entering the stripping section and enter the flow control assembly 9 from the fixed valve port 911 and the rotary valve port 921, and the retention amount of the solid particles at the top of the flow control assembly 9 is reduced.

In order to prolong the actual service life of the driving mechanism 93, the protective shell 922 is arranged at the center of the bottom surface of the rotary valve plate 92, the driving mechanism 93 is arranged inside the protective shell 922, and the protective shell 922 is used as the outer protection of the driving mechanism 93, so that the influence of liquid products or solid particles on the driving mechanism is reduced, and the driving mechanism 93 is ensured to have reasonable service life. The power supply of the driving mechanism may be a battery, or may be led out from the stripping section through an electric wire to be connected to a fixed power supply.

In order to improve the pumping efficiency of the solid particles, the side surface of the supporting shell 95 provided by the utility model is a conical surface, the conical surface is designed to have a larger outlet sectional area, and the solid particles generate a centripetal movement trend after entering the flow control assembly, so that the solid particles are rapidly pumped under the action of the extraction pump 7, the anti-blocking effect is better, and the pumping efficiency is higher.

In order to improve the driving performance of the driving mechanism 93, the driving mechanism 93 provided by the utility model comprises a speed reduction motor 931, wherein the output end of the speed reduction motor 931 is provided with a central gear shaft 932, the output end of the central gear shaft 932 is provided with a transition gear 933 meshed with the central gear shaft, the output end of the transition gear 933 is provided with an internal gear 934 meshed with the transition gear 933, and the internal gear 934 is arranged at the center of the rotary valve plate 92. The driving mechanism 93 drives the central gear shaft 932 to rotate, the central gear shaft 932 drives the inner gear 934 to rotate through the transition gear 933, the inner gear 934 directly drives the rotary valve plate 92 and makes synchronous rotary motion with the rotary valve plate 92, the fixed valve plate 91 and the rotary valve plate 92 are guaranteed to have timely reaction efficiency, and then the efficiency of flow control operation is guaranteed. The driving mechanism is simple in structure, high in driving efficiency, low in failure rate and high in usability.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. A novel rectifying tower kettle extraction device for continuous rectification comprises a rectifying tower kettle and a reboiler, wherein the rectifying tower kettle and the reboiler are connected through a connecting pipeline and a circulating pipeline, a tower kettle extraction pipeline is arranged at a liquid phase output end of the rectifying tower kettle, a side line extraction pipeline is arranged at a liquid phase output end of the reboiler, and an extraction pump is arranged on the tower kettle extraction pipeline. The edge of rotatory valve block is provided with a plurality of rotatory valve ports that are circular array and distribute, the bottom of rotatory valve block is provided with actuating mechanism, actuating mechanism's bottom is provided with the support shell, the side of supporting the shell is provided with a plurality of discharge openings that are radial distribution, the inside center of supporting the shell is provided with the drainage awl of handstand.

2. The novel distillation column bottom extraction device for continuous rectification according to claim 1, wherein the top surface and the bottom surface of the fixed valve plate are both spherical surfaces, and the top surface and the bottom surface of the rotary valve plate are both spherical surfaces.

3. The novel extraction device in the tower bottom of the rectification tower for continuous rectification according to claim 2, wherein the fixed valve port and the rotary valve port are the same in shape and are both n-shaped ports, the head of each n-shaped port faces radially to the proximal end of the fixed valve plate or the proximal end of the rotary valve plate, and the tail end of each n-shaped port inclines to the distal end of the fixed valve plate or the distal end of the rotary valve plate.

4. The novel extraction device in the tower bottom of the rectification tower for continuous rectification according to claim 3, wherein a protective shell is arranged in the center of the bottom surface of the rotary valve plate, and the driving mechanism is arranged inside the protective shell.

5. The novel distillation column bottom extraction device for continuous rectification according to claim 4, wherein the side surface of the support shell is a conical surface.

6. The novel continuous rectification tower kettle extraction device as claimed in claim 1, wherein the driving mechanism comprises a speed reducing motor, a central gear shaft is arranged at an output end of the speed reducing motor, a transition gear meshed with the central gear shaft is arranged at an output end of the central gear shaft, an internal gear meshed with the transition gear is arranged at an output end of the transition gear, and the internal gear is arranged in the center of the rotary valve plate.