CN217139254U

CN217139254U - Sieve plate tower tray and de-heavy tower

Info

Publication number: CN217139254U
Application number: CN202123072938.9U
Authority: CN
Inventors: 付学华
Original assignee: Guoneng Mengxi Coal Chemical Co ltd; National Energy Group Coal Coking Co Ltd
Current assignee: Guoneng Mengxi Coal Chemical Co ltd; National Energy Group Coal Coking Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-08-09
Anticipated expiration: 2031-12-08

Abstract

The utility model relates to a distillation separation technical field discloses a sieve tray and heavy tower of taking off, and this sieve tray includes: the tower comprises a tower tray and a cap cover arranged on the tower tray, wherein a plurality of overflowing holes corresponding to the cap cover are formed in the tower tray; the upper end of the overflowing hole is communicated with the corresponding cap, the lower end of the overflowing hole is communicated with the space below the tower tray, the plurality of caps are arranged along the radial direction of the tower tray, and a plurality of sieve holes are formed in the two sides of each cap. The sieve plate tray is a porous composite guide tray, a float valve is not arranged on the tray, the defects caused by the falling of the float valve in the prior art are overcome, in addition, the gas-liquid contact area can be increased, so that the gas-liquid is fully contacted, the sieve plate tray has the advantages of high separation efficiency, large gas circulation area and small circulation resistance, the separation capacity and the processing capacity of the tower can be improved under the condition of unchanged diameter of the tower, the quality of products at the top of the tower and products at the bottom of the tower is further improved, the energy consumption of the tower is further reduced, and the purposes of quality improvement and energy consumption reduction are achieved.

Description

Sieve plate tower tray and de-heavy tower

Technical Field

The utility model relates to a distillation separation technical field specifically relates to a sieve tray and heavy tower takes off.

Background

The equipment for distilling and separating various mixtures in China mainly comprises a float valve tower, a packed tower, a sieve plate tower or a vertical sieve plate tower and the like, at present, in the benzene hydrogenation industry in China, the float valve tower is adopted to distill and separate crude benzene, the crude benzene enters the tower from the middle part of the tower, partial evaporation gasification and condensation are carried out on the float valve tower plate, light boiling point components in the crude benzene are evaporated and gasified to an upper layer of tower tray, high boiling point components in the crude benzene flow to a lower layer of tower tray due to the fact that the high boiling point components cannot be gasified, and therefore the crude benzene is separated into light benzene and heavy benzene through multiple times of evaporation and gasification of 50 layers of tower trays.

The heavy component removing tower is a main device for removing heavy components of a crude benzene raw material by a crude benzene hydrogenation process, and is a first process of a crude benzene hydrogenation production device, a reduced pressure distillation process and forced circulation at the bottom of the tower are adopted, the material produced at the bottom of the tower is the heavy component in the crude benzene, the material produced at the top of the tower is light benzene, the internal structure of the original device is a 50-layer floating valve tower plate, the whole floating valve tower plate is seriously thinned due to continuous scouring of gas and liquid in production operation, the floating valve frequently drops, the gas-liquid contact of the tower plate is insufficient, the distillation efficiency is greatly reduced, the production process requirements cannot be met, in addition, the dropped floating valve flows into an inlet pipeline of a forced circulation pump along with the material, the inlet pipeline is blocked, even a small amount of floating valves are sucked into the forced circulation inlet impeller, the shielding pump is severely vibrated, the pump impeller and the bearing are damaged, the device maintenance frequency is increased, and the like. The defects seriously affect the normal production of the device and cause great threat to the safety production of the benzene hydrogenation device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the current float valve column plate that prior art exists and being easy at gas, the continuous washing of liquid leads to the float valve to frequently drop and influence the problem of distillation separation effect down, a sieve tray is provided, this sieve tray is porous compound direction column plate, there is not the float valve on the column tray, overcome present drawback because the float valve drops and brings for production, can increase gas-liquid area of contact in addition, make gas-liquid fully contact, separation efficiency is high, gaseous flow area is big and the little advantage of flow resistance, can be under the unchangeable circumstances of tower diameter, improve the separating power and the processing ability of tower, make top of the tower product and tower bottom product quality further improve, the energy consumption of tower further reduces, reach the purpose of upgrading and the volume of improving reduction energy consumption.

In order to achieve the above object, the present invention provides a sieve tray, comprising: the tray is provided with a plurality of overflowing holes corresponding to the caps; the upper end of the overflowing hole is communicated with the corresponding cap cover, the lower end of the overflowing hole is communicated with the space below the tower tray, the cap covers are arranged along the radial direction of the tower tray, and a plurality of sieve holes are formed in the two sides of each cap cover.

Preferably, the height of the plurality of caps is gradually reduced from the middle part to the two sides.

Preferably, a plurality of the caps are arranged in left-right symmetry.

Preferably, the plurality of caps are gradually reduced in width from the middle portion toward both sides.

Preferably, a plurality of said sieve holes on each side of said cap are layered.

Preferably, the sieve holes of each side adjacent layer on the cap cover are arranged in a staggered mode.

Preferably, a plurality of the mesh holes of each layer are arranged at equal intervals.

Preferably, the mesh holes are arranged at the same interval in the vertical direction.

Preferably, the sieve holes on two sides of the cap are arranged in one-to-one correspondence.

The utility model discloses the second aspect provides a heavy tower takes off, should take off and be provided with the multilayer in the heavy tower sieve tray.

Through the technical scheme, the sieve plate tower tray is a porous composite guide tower tray, the tower tray is not provided with a floating valve, the defects caused by the falling of the floating valve in the prior art are overcome, in addition, the gas-liquid contact area can be increased, so that the gas-liquid contact is fully realized, the sieve plate tower tray has the advantages of high separation efficiency, large gas circulation area and small circulation resistance, the separation capacity and the processing capacity of the tower can be improved under the condition that the diameter of the tower is not changed, the quality of products at the top of the tower and products at the bottom of the tower is further improved, the energy consumption of the tower is further reduced, and the purposes of improving the quality and improving the quantity and reducing the energy consumption are achieved.

Drawings

FIG. 1 is a front view of a preferred embodiment of a sieve tray;

FIG. 2 is a side view of a preferred embodiment of a sieve tray;

FIG. 3 is a schematic cross-sectional view of a preferred embodiment of a tray;

FIG. 4 is a schematic cross-sectional view of a preferred embodiment of the cap;

fig. 5 is a top view of a preferred embodiment of a sieve tray.

Description of the reference numerals

1-a tray; 2-a cap; 3-an overflowing hole; 4-mesh.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, the terms "upper, lower, left, right, front, rear, inner, and outer" and the like included in the terms refer to the orientation of the terms in the normal use state or the common names understood by those skilled in the art, and should not be construed as limiting the terms.

Referring to the sieve tray shown in fig. 1-5, the sieve tray comprises: the device comprises a tray 1 and a cap cover 2 arranged on the tray 1, wherein a plurality of overflowing holes 3 corresponding to the cap cover 2 are arranged on the tray 1; the upper end of the overflowing hole 3 is communicated with the corresponding cap cover 2, the lower end of the overflowing hole is communicated with the space below the tower tray 1, the cap covers 2 are arranged along the radial direction of the tower tray 1, and a plurality of sieve holes 4 are formed in the two sides of the cap covers 2.

Through the implementation of the technical scheme, the sieve plate tower tray is a porous composite guide tower tray, a float valve is not arranged on the tower tray 1, the defects caused by the falling of the float valve in the prior art are overcome, in addition, the gas-liquid contact area can be increased, so that the gas-liquid contact is fully realized, the sieve plate tower tray has the advantages of high separation efficiency, large gas flow area and small flow resistance, the separation capacity and the processing capacity of the tower can be improved under the condition that the diameter of the tower is not changed, the quality of products at the top of the tower and products at the bottom of the tower is further improved, the energy consumption of the tower is further reduced, and the purposes of quality improvement and energy consumption reduction are achieved. Specifically, gas rises through the through-hole 3 from below the tray 1 and transversely flows out from the sieve holes 4, liquid falls through the through-hole 3 after entering the cap cover 2 through the sieve holes 4, and through the sieve plate tray with the structure, the total area of the sieve holes 4 on the sieve plate tray is increased compared with the total area of the conventional float valve, the gas flow area is obviously increased, the separation efficiency can be increased, the flow resistance can be reduced, in addition, as the sieve holes 4 are arranged on two sides of the cap cover 2, the gas is transversely discharged from the two sides, the gas-liquid contact area can also be increased, and a convection phenomenon can be generated between two adjacent cap covers 2, so that the gas-liquid can be fully contacted, and the separation efficiency is increased.

In the present invention, the shape of the overflowing hole 3 corresponds to the bottom opening of the cap 2, and the overflowing area of the overflowing hole 3 is 80-100% of the bottom opening area of the cap 2.

In this embodiment, the heights of a plurality of caps 2 are gradually reduced from the middle toward both sides. As shown in fig. 1-2, the number of caps 2 is 5, the height of the cap 2 in the middle is the highest, and the heights of the caps 2 closer to the two sides are lower, so that the caps 2 are in a dispersed step shape, the caps 2 closer to the middle have good gas-liquid contact effect, and the separation efficiency is improved.

In this embodiment, in order to increase the uniformity of gas-liquid separation, a plurality of caps 2 are arranged in bilateral symmetry as shown in fig. 1, 2 and 5.

In this embodiment, in order to further increase the separation effect, the widths of the plurality of caps 2 are gradually reduced from the middle toward both sides. As shown in fig. 2 and 5, the width of the middle cap 2 is the largest, and the widths of the caps 2 closer to the two sides are smaller, so that the caps 2 closer to the middle have good gas-liquid contact effect, and the separation efficiency is improved.

In this embodiment, in order to further increase the uniformity of gas-liquid separation, a plurality of the sieve holes 4 are layered on each side of the cap 2.

In this embodiment, in order to further increase the separation effect, the sieve holes 4 of adjacent layers on each side of the cap 2 are arranged offset. In this way, a cross arrangement structure is formed, so that gas-liquid separation is more sufficient.

In this embodiment, in order to further increase the uniformity of gas-liquid separation, a plurality of the sieve holes 4 are arranged at equal intervals for each layer.

In this embodiment, in order to further increase the uniformity of gas-liquid separation, the pitches of the plurality of sieve holes 4 in the vertical direction are the same.

In this embodiment, in order to further increase the uniformity of gas-liquid separation, the sieve holes 4 on both sides of the cap 2 are arranged in one-to-one correspondence. That is, the orthographic projections of the plurality of screen holes 4 on one side of the cap 2 on the other side are overlapped, and the side walls on the two sides are symmetrical.

Furthermore, the utility model discloses the second aspect provides a heavy tower takes off, should take off and be provided with the multilayer in the heavy tower sieve tray.

The de-heavy tower can fully utilize the downtime for maintenance, completely remove 50 trays of the float valve on the original de-heavy tower, and then install the newly manufactured 50 layers of porous composite guide tower plates on the original tower tray bracket, thereby meeting the technical reconstruction requirements.

After the sieve plate tower tray is adopted by the heavy component removal tower, the crude benzene raw material treatment capacity is increased to 15-18t/h from the original 10-12t/h, and the energy expansion is 50 percent compared with the original design.

In addition, the sieve plate tower tray does not have the phenomenon of drop of the float valve, does not have the phenomenon of blockage of an inlet pipeline of the forced circulation pump, and does not cause the problem that the float valve enters the impeller of the forced circulation pump to cause frequent maintenance of the shield pump, so that the production system is safer and more stable to operate.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. A sieve tray, comprising: the device comprises a tray (1) and a cap (2) arranged on the tray (1), wherein a plurality of overflowing holes (3) corresponding to the cap (2) are formed in the tray (1);

the upper end of overflowing hole (3) with corresponding cap (2) intercommunication, the lower extreme with the below space intercommunication of tray (1), it is a plurality of cap (2) are followed the radial direction of tray (1) is arranged and is set up, the both sides of cap (2) all are provided with a plurality of sieve meshes (4).

2. The sieve tray in accordance with claim 1, wherein the height of a plurality of caps (2) decreases gradually from the middle towards both sides.

3. The sieve tray of claim 2, wherein a plurality of said caps (2) are arranged in bilateral symmetry.

4. A sieve tray according to any one of claims 1-3, characterised in that the width of a number of said caps (2) decreases gradually from the middle towards both sides.

5. The sieve tray of claim 1, wherein a plurality of the sieve holes (4) on each side of the cap (2) are distributed in layers.

6. The sieve tray as claimed in claim 5, characterized in that the sieve holes (4) of adjacent layers on each side of the cap (2) are arranged offset.

7. Screen tray according to claim 5, characterized in that a plurality of said sieve holes (4) of each layer are arranged at equal intervals.

8. The sieve tray as claimed in claim 5, wherein the plurality of sieve holes (4) have the same interval in the vertical direction.

9. The sieve tray as set forth in claim 1, characterized in that the sieve holes (4) on both sides of the cap (2) are arranged in a one-to-one correspondence.

10. A de-heaving column, wherein a plurality of layers of the sieve tray of any one of claims 1-9 are disposed within the de-heaving column.