CN210699166U

CN210699166U - Cyclone separation equipment and device for preparing olefin from methanol

Info

Publication number: CN210699166U
Application number: CN201920958594.5U
Authority: CN
Inventors: 靳长友; 张树清; 陆青; 周晖; 张国磊; 孙乾义; 钱成伟; 吴晓辉; 吴双清
Original assignee: Petrochina Co Ltd; China Huanqiu Contracting and Engineering Corp
Current assignee: Petrochina Co Ltd; China Huanqiu Contracting and Engineering Corp
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-06-09
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses a cyclone and device of methyl alcohol system alkene belongs to petrochemical equipment technical field. The utility model discloses with the collection of a plurality of separators on same first collection chamber, set up common casing in order to receive the catalyst that waits to give birth to outside a plurality of separators to set up the second collection chamber of each separator of intercommunication in the casing, with the gas of separation in the receipt separator. The volume occupied by the separation equipment is greatly reduced, and the equipment investment is reduced.

Description

Cyclone separation equipment and device for preparing olefin from methanol

Technical Field

The utility model relates to a petrochemical equipment technical field, in particular to cyclone and device of methyl alcohol system alkene.

Background

The low-carbon olefins such as ethylene, propylene and the like are important basic organic chemical raw materials, are key intermediates for synthesizing plastics, fibers and various chemical materials, and are the basis of organic chemical industry. In industrial processes, the MTO (Methanol to olefins) process is often used to produce olefins. The basic principle of the MTO process is: under the catalytic action of the catalyst, methanol undergoes a rapid exothermic reaction to generate ethylene, propylene and other byproducts, coke in the byproducts is attached to the catalyst to form a spent catalyst, and gases and solids in reaction products are generally separated by using a settling section and a multi-group separator.

In the current common production equipment, a reactor mainly adopts two types of turbulent bed and fast bed, and the two types of equipment adopt low-speed sedimentation and cyclone separation to separate after reaction, and particularly, after a reaction product is settled by a sedimentation section of the reactor, a catalyst is separated by a separator.

The separation equipment adopts a low-speed sedimentation mode to separate products after reaction, the diameter of a separation device in the reaction equipment is larger, for example, a turbulent bed MTO device with annual handling capacity of 180 ten thousand tons has the diameter of 16000mm, the equipment investment is larger, and the equipment size design is also limited.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a device of whirlwind splitter and methyl alcohol system alkene can solve the great equipment investment that makes of present splitter size commonly used great, the difficult problem of device macro-scale design. The technical scheme is as follows:

there is provided cyclonic separating apparatus comprising: the shell is provided with a first gas collecting chamber, a second gas collecting chamber and a plurality of separators, wherein the first gas collecting chamber, the second gas collecting chamber and the plurality of separators are positioned in an inner cavity of the shell;

the top wall of the shell is provided with an air inlet and an air outlet, and the bottom of the shell is provided with a solid outlet;

the upper end of the first gas collection chamber is communicated with the gas inlet, and the lower end of the first gas collection chamber is communicated with the inlet of each separator;

the upper end of the second gas collecting chamber is communicated with the exhaust port, and the lower end of the second gas collecting chamber is communicated with the gas separating port of each separator;

the separators are uniformly distributed along the circumferential direction of the first gas collecting chamber, and the dipleg of each separator is communicated with the solid outlet.

In one possible design, the housing includes: the arc-shaped end socket, the cylindrical main body and the conical main body are communicated from top to bottom in sequence;

the air inlet and the air outlet are arranged on the arc-shaped sealing head;

the solid outlet is arranged at the bottom of the conical body;

the dipleg of each separator extends into the conical body.

In one possible design, the cylindrical body has an outside diameter of: 2000mm-12000 mm.

In one possible design, the side wall of the cylindrical body is provided with an assembling and disassembling hole, and a detachable cover body is arranged at the assembling and disassembling hole.

In one possible design, a circular cylinder with an opening at the upper end and a closed lower end is arranged in the shell, and the circular cylinder and the arc-shaped end enclosure are enclosed to form the first air collection chamber;

the side wall of the first plenum chamber is communicated with the inlet of each separator.

In one possible design, a conical cylinder with an opening at the upper end is arranged in the shell, and the conical cylinder and the arc-shaped end enclosure are enclosed to form the second air collecting chamber;

the bottom wall of the conical cylinder body is communicated with the gas separation port of each separator;

the upper end of the first air collecting chamber is positioned in the second air collecting chamber.

In one possible design, the conical cylinder also has a plurality of air holes on the bottom wall.

In one possible design, each air hole has a diameter of 15mm to 30 mm.

In one possible design, the number of the plurality of separators is 2-16.

In one aspect, there is provided an apparatus for producing olefins from methanol, the apparatus comprising cyclonic separation means as provided in any one of the possible designs of the first aspect.

The multiple separators are gathered on the same first gas collecting chamber, a common shell is arranged outside the multiple separators to receive spent catalyst, and a second gas collecting chamber communicated with the separators is arranged in the shell to receive gas separated from the separators. The volume occupied by the separation equipment is greatly reduced, and the equipment investment is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a cyclone separation apparatus according to an embodiment of the present invention.

The various reference numbers in the drawings are illustrated below:

1-a shell;

11-an air inlet;

12-an exhaust port;

13-a solids outlet;

14-arc seal head;

15-a cylindrical body;

151-loading and unloading hole, 152-cover body;

16-a conical body;

2-a first gas collecting chamber;

3-a second gas collecting chamber;

31-pores;

4-a separator;

41-inlet, 42-gas separation port, 43-dipleg.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a cyclone separation apparatus provided in an embodiment of the present invention, the cyclone separation apparatus includes: the device comprises a shell 1, a first gas collecting chamber 2, a second gas collecting chamber 3 and a plurality of separators 4, wherein the first gas collecting chamber 2, the second gas collecting chamber 3 and the separators 4 are positioned in an inner cavity of the shell 1; the top wall of the shell 1 is provided with an air inlet 11 and an air outlet 12, and the bottom is provided with a solid outlet 13; the upper end of the first gas collecting chamber 2 is communicated with the gas inlet 11, and the lower end is communicated with the inlet 41 of each separator 4; the upper end of the second gas collecting chamber 3 is communicated with the exhaust port 12, and the lower end is communicated with the gas separating port 42 of each separator 4; the separators 4 are uniformly distributed along the circumferential direction of the first gas collecting chamber 2, and the dipleg 43 of each separator 4 is communicated with the solid outlet 13.

The embodiment of the present invention provides a cyclone separation device, the working principle of which is detailed below:

in the device for preparing olefin from methanol, a methanol raw material and a catalyst are mixed in a reactor, the methanol rapidly reacts under the catalytic action of the catalyst to generate gas, coke is attached to the surface of the reacted catalyst and becomes a spent catalyst, the reacted gas and the spent catalyst are reaction products, and the reaction products are output from the reactor and enter the cyclone separation equipment through an air inlet 11. The spent catalyst can be reused in the catalytic reaction after being regenerated by the regenerator.

In the cyclone separation device, reaction products are firstly gathered in the first gas collection chamber 2 and then distributed into the separators 4; the first gas collecting chamber 2 can play a role of buffering and balancing reaction products entering the first gas collecting chamber.

Because the plurality of separators 4 are uniformly distributed along the circumferential direction of the first gas collection chamber 2, reaction products can uniformly enter each separator 4 and are rapidly separated in each separator 4, the separated gas flows into the second gas collection chamber 3 through the gas separation port 42 of each separator 4, and the spent catalyst flows out of the separators 4 through the diplegs 43 of each separator 4 and further flows out of the solid outlet 13 of the shell 1 for the next regeneration and other treatment.

Wherein, the separators 4 are cyclone separators, the reaction product with higher pressure is introduced into the separator 4 and rotates at high speed in the separator 4, and the gas in the separator gradually flows upwards due to lower density; the spent catalyst is a granular solid, collides with the inner wall of the separator 4 during high-speed rotation, and then moves down along the inner wall to the dipleg 43. The above design enables the apparatus to maintain high efficiency and a suitable pressure drop in the separator 4 at low gas concentrations in the reaction product and small catalyst particle sizes. Moreover, the dipleg 43 at the lower end of the separator 4 is shorter, further reducing the size of the apparatus.

The gas flowing into the second gas collecting chamber 3 is exhausted through the exhaust port 12 for further processing.

The cyclone separation equipment collects a plurality of separators 4 on the same first gas collecting chamber 2, a common shell 1 is arranged outside the separators 4 to receive spent catalyst, and a second gas collecting chamber 3 communicated with the separators 4 is arranged in the shell 1 to receive gas separated in the separators 4. The volume occupied by the separation equipment is greatly reduced, and the equipment investment is reduced.

In one possible design, the housing 1 comprises: the arc-shaped end socket 14, the cylindrical main body 15 and the conical main body 16 are communicated from top to bottom in sequence; the air inlet 11 and the air outlet 12 are arranged on the arc-shaped end enclosure 14; the solids outlet 13 is disposed at the bottom of the conical body 16; the dipleg 43 of each separator 4 extends into the conical body 16.

In order to ensure the tightness of the housing 1, the cylindrical body 15 and the conical body 16, and the cylindrical body 15 and the arc-shaped end enclosure 14 are fixedly connected, for example, welded, so that the housing 1 is more firm and sealed. The conical body 16 is wide at the top and narrow at the bottom, so that the spent catalyst falling onto the inner wall of the conical body 16 slides down into the solid outlet 13.

In one possible design, the outer diameter of the cylindrical body 15 is: 2000mm-12000 mm. For example, it may be 2000mm, 3000mm, 4000mm, 5000mm, 6000m, 7000mm, 8000mm, 9000mm, 10000mm, 11000mm, 12000mm, or the like.

The above arrangement is such that: the present embodiment provides cyclonic separating apparatus of substantially reduced size relative to the same throughput of separating apparatus. For example, in the related art: in a turbulent-bed MTO facility with a throughput of 180 ten thousand tons/year, the diameter of the separation apparatus is usually 16000mm, and in the present embodiment, the outer diameter of the cylindrical body 15 is about 8000 mm. The design obviously reduces the size of the equipment, and greatly reduces the design difficulty of the device and the equipment investment.

In one possible design, the cylindrical body 15 has an attachment/detachment hole 151 in a side wall thereof, and a detachable cover 152 is provided at the attachment/detachment hole 151.

The housing 1 and the devices therein can be installed, inspected and replaced through the attachment/detachment hole 151, and the size of the attachment/detachment hole 151 can be set according to specific needs, for example, the size of the attachment/detachment hole 151 can be 2400mm for a cylindrical body 15 having an outer diameter of 8000 mm.

The removable hole 151 is provided with a removable cover 152 adapted thereto, so that the removable hole 151 can be easily closed when the operation such as inspection is not performed.

In a possible design, a circular cylinder with an open upper end and a closed lower end is arranged in the shell 1, and the circular cylinder and the arc-shaped end enclosure 14 enclose to form the first gas collection chamber 2; the side wall of the first plenum 2 communicates with the inlet 41 of each separator 4.

The circular cylinder of the first gas collection chamber 2 and the arc-shaped end enclosure 14 of the housing 1 are fixedly connected, for example, by welding, so as to ensure the firmness of the first gas collection chamber 2. The air inlet 11 on the shell 1 is arranged at the central position of the arc-shaped end enclosure 14, and the first air collection chamber 2 connected with the air inlet is also arranged at the central position in the inner cavity of the shell 1, so that the plurality of separators 4 can be conveniently distributed, and the space in the shell 1 can be efficiently utilized.

In a possible design, a conical cylinder with an open upper end is arranged inside the shell 1, and the conical cylinder and the arc-shaped end enclosure 14 enclose to form the second air collection chamber 3; the bottom wall of the conical cylinder is communicated with the gas separation port 42 of each separator 4; the upper end of the first plenum chamber 2 is positioned in the second plenum chamber 3.

The second gas collection chamber 3 is arranged on the upper side of the separators 4, is an annular structure formed by surrounding the first gas collection chamber 2, the inner wall of the annular structure is formed by the outer wall of the first gas collection chamber 2, the top wall is formed by an arc-shaped end enclosure 14, the side wall is conical, and the bottom is a horizontal bottom plate. The upper edge of the conical side wall is connected with the arc-shaped end enclosure 14, the lower edge of the conical side wall is connected with the horizontal bottom plate, and the horizontal bottom plate is provided with a plurality of holes corresponding to the separators 4 and used for penetrating through the separators 4 and the second gas collection chamber 3.

The separators 4 are hoisted through the side wall of the first gas collecting chamber 2 and the horizontal bottom plate of the second gas collecting chamber 3, so that the separators 4 are stressed uniformly and have stable structure.

In one possible design, the conical cylinder also has a plurality of air holes 31 in its bottom wall.

The plurality of air holes 31 are uniformly distributed in the circumferential direction, and are arranged at least one turn in the radial direction. The design enables the gas in the inner cavity of the shell 1 to flow upwards to the second gas collecting chamber 3 through the plurality of air holes 31, improves the recovery rate of the reaction gas, and balances the pressure in the shell 1.

In one possible design, each air hole 31 has a diameter of 15mm to 30 mm. For example, it may be 15mm, 20mm, 25mm, 30mm, or the like.

The specific size of the air holes 31 can be set as desired, for example, the diameter and number of the air holes 31 are determined according to the amount and pressure of the air in the inner cavity of the housing 1.

In one possible design, the number of the plurality of separators 4 is 2-16. For example, there may be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, etc. The number of separators 4 is set within a certain space within the housing 1 according to the operational requirements and the processing capacity of each separator 4. The plurality of separators 4 have the same specification, so that the load in the plurality of separators 4 is uniform and stable.

Above-mentioned all optional technical scheme can adopt arbitrary combination to form the optional embodiment of this utility model, and the repeated description is no longer given here.

The embodiment of the utility model provides a device of methyl alcohol system alkene is still provided, and the device includes the cyclone that provides in any kind of above-mentioned possible design.

Wherein, the device includes: the reactor comprises a reaction device and a cyclone separation device, reaction products output from the reaction device are separated into gas and a catalyst to be regenerated in the cyclone separation device, the regenerator carries out treatments such as stripping, burning, secondary stripping and the like on the catalyst to be regenerated so as to convert the catalyst to be regenerated, and then the regenerated catalyst is conveyed to the reaction device of the reactor.

The device for preparing olefin from methanol by using the cyclone separation equipment has the advantages of greatly reducing the size of the device, reducing the equipment investment and being beneficial to the large-scale design of the device.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. Cyclonic separating apparatus, characterised in that the cyclonic separating apparatus comprises: the device comprises a shell (1), and a first gas collection chamber (2), a second gas collection chamber (3) and a plurality of separators (4) which are positioned in an inner cavity of the shell (1);

the top wall of the shell (1) is provided with an air inlet (11) and an air outlet (12), and the bottom of the shell is provided with a solid outlet (13);

the upper end of the first gas collecting chamber (2) is communicated with the gas inlet (11), and the lower end of the first gas collecting chamber is communicated with the inlet (41) of each separator (4);

the upper end of the second gas collecting chamber (3) is communicated with the exhaust port (12), and the lower end of the second gas collecting chamber is communicated with the gas separating port (42) of each separator (4);

the separators (4) are uniformly distributed along the circumferential direction of the first gas collecting chamber (2), and a dipleg (43) of each separator (4) is communicated with the solid outlet (13).

2. Cyclonic separating apparatus as claimed in claim 1, wherein the housing (1) comprises: the arc-shaped end socket (14), the cylindrical main body (15) and the conical main body (16) are communicated from top to bottom in sequence;

the air inlet (11) and the air outlet (12) are arranged on the arc-shaped seal head (14);

the solids outlet (13) is arranged at the bottom of the conical body (16);

the dipleg (43) of each separator (4) extends into the conical body (16).

3. Cyclonic separating apparatus as claimed in claim 2, wherein the outer diameter of the cylindrical body (15) is: 2000mm-12000 mm.

4. The cyclone separation apparatus as claimed in claim 2, wherein the cylindrical body (15) has a loading and unloading hole (151) in a sidewall thereof, and a detachable cover (152) is provided at the loading and unloading hole (151).

5. The cyclone separation equipment as claimed in claim 2, characterized in that the inside of the shell (1) is provided with a circular cylinder with an open upper end and a closed lower end, and the circular cylinder and the arc-shaped end socket (14) are enclosed to form the first air collection chamber (2);

the side wall of the first gas collecting chamber (2) is communicated with the inlet (41) of each separator (4).

6. The cyclone separation equipment as claimed in claim 2, characterized in that a conical cylinder with an upper end opening is arranged in the shell (1), and the conical cylinder and the arc-shaped end socket (14) enclose to form the second air collecting chamber (3);

the bottom wall of the conical cylinder body is communicated with a gas separation port (42) of each separator (4);

the upper end of the first gas collecting chamber (2) is positioned in the second gas collecting chamber (3).

7. Cyclonic separating apparatus as claimed in claim 6, wherein the base wall of the cone is further provided with a plurality of air holes (31).

8. Cyclonic separating apparatus as claimed in claim 7, wherein each air hole (31) has a diameter of from 15mm to 30 mm.

9. Cyclonic separating apparatus as claimed in claim 1, wherein the number of the plurality of separators (4) is from 2 to 16.

10. An apparatus for producing olefins from methanol, characterized by comprising the cyclone separation device according to any one of claims 1 to 9.