CN214210128U - Mixed feeding buffer tank - Google Patents

Abstract

The utility model discloses a mixed feeding buffer tank, which comprises a shell, a stirrer, a feeding port and a discharging port; the stirrer is connected with the top of the shell and comprises an axial flow type curved surface wide blade and a paddle type blade; the feed inlet is positioned at the top of the shell; the discharge hole is positioned at the bottom of the shell. The mixed feeding buffer tank can be used for a slurry bed residual oil hydrogenation device and has the advantages of high mixing efficiency, homogeneous phase and good temperature equalizing effect.

Description

Mixed feeding buffer tank

Technical Field

The utility model relates to a mix the feeding buffer tank, especially relate to a slurry bed residual oil hydrogenation device's mixed feeding buffer tank.

Background

In recent years, the production of crude oil has a tendency to be heavy and inferior, and the proportion of heavy oil in crude oil is as high as 30% to 50%. The current processing of inferior heavy oil mainly comprises catalytic cracking, fixed bed hydrogenation, delayed coking, fluidized bed hydrogenation and slurry bed hydrogenation technologies.

The slurry bed hydrogenation technology of inferior heavy oil is mainly characterized in that the slurry bed hydrogenation technology of inferior heavy oil can treat low-quality heavy oil residue with high metal, high carbon residue and high viscosity, the inferior heavy oil is subjected to hydro-thermal cracking reaction under the action of a highly dispersed catalyst, the catalyst has lower hydrogenation activity and mainly plays a coke inhibiting function, and the catalyst can ensure that the heavy oil is subjected to the hydro-cracking reaction under harsher reaction conditions without coke formation during the hydro-thermal cracking reaction; the slurry bed hydrogenation technology of inferior heavy oil has liquid product yield as high as 80-90%, and is the highest conversion rate process.

Generally, the material of slurry bed hydrogenation technology of inferior heavy oil needs to enter a mixing feed buffer tank to complete mixing before entering a slurry bed reactor, and the material comprises liquid fresh feed which is easy to mix and suspend, liquid decompression circulating material, solid particles containing coke, liquid catalyst and the like, and the other purpose of mixing is to maintain the medium in a homogeneous state and make the medium have a uniform temperature.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mix feeding buffer tank, this mix feeding buffer tank can be used for slurry bed residual oil hydrogenation device, has the effectual advantage of mixing efficiency height, homogeneous phase and samming.

In order to achieve the purpose, the utility model provides a mixing and feeding buffer tank, which comprises a shell, a stirrer, a feeding port and a discharging port; the stirrer is connected with the top of the shell and comprises an axial flow type curved surface wide blade and a paddle type blade; the feed inlet is positioned at the top of the shell; the discharge hole is positioned at the bottom of the shell.

In one embodiment, the stirrer is provided with three sets of axial flow type curved wide blades and a set of paddle type blades from the top to the bottom of the shell in sequence.

In one embodiment, the feed ports include a catalyst feed port and a material feed port, the material feed port is connected with a pipeline, and the end of the pipeline is close to the bottom of the shell.

In one embodiment, the outlet comprises a slurry outlet and a liquid outlet.

In one embodiment, the upper portion of the housing is a cylindrical structure and the lower portion is a conical structure.

In one embodiment, the stirrer is connected with the top of the shell through a flange, and a cooling jacket is arranged inside the flange.

In one embodiment, the agitator is offset from the axis of the housing.

In one embodiment, the agitator is connected to a sliding bearing at an end proximate the bottom of the housing.

In one embodiment, a double mechanical seal is provided between the agitator and the housing.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses a mix feeding buffer tank has mixing efficiency height, homogeneous phase and the effectual advantage of samming. The stirrer of the utility model is provided with 4 groups of blades, three groups of blades near the top of the shell are axial flow type curved surface wide blades, and the blades near the bottom of the shell are paddle type blades; the three groups of axial flow type curved surface wide blades enable fluid to move in a synthesis mode of axial rotation and axial movement, and meanwhile, the high-efficiency shearing and extruding effect of the axial flow type curved surface wide blades enables multiple materials to be uniformly mixed, so that the effects of homogeneous phase and temperature equalization are achieved.

2. The utility model discloses a mix feeding buffer tank sealing performance is good, adopts double mechanical seal, realizes the cooling of three level through the oil station, is the lubricated cooling of frame ring flange cooling, mechanical seal lower cavity cooling, mechanical seal quiet ring cavity respectively, ensures mechanical seal's even running.

3. The utility model discloses a mixer swing of mixed feeding buffer tank is little, through the speed reducer bearing, frame bearing and the plain bearing's of bottom aligning effect to this steady operation that realizes the agitator.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the mixed feed buffer tank of the present invention.

Fig. 2 is a schematic cross-sectional view of an embodiment of the sliding bearing support of the present invention.

Fig. 3 is a schematic left view of an embodiment of the material feeding hole of the present invention.

Wherein, the reference numbers:

stirrer 1

Case 2

Skirt 3

Reinforcing ring 4

Cone structure 5

Sliding bearing 6

Plain bearing carrier 7

Ladder stand 8

Manhole 9

Support frame 10

Pipeline 11

Double mechanical seal 12

N1 catalyst feed

N2 Material feeding hole

N3 slurry outlet

N4 vacuum pump mouth

N5, N6 and N7 pump ports

N8 liquid outlet

N9 sealing port

N10 vent

M1, M2 manhole

N13 steam outlet

Detailed Description

To better understand the utility model, the utility model is now explained with reference to the attached drawings. The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and processes are given, but the scope of the present invention is not limited to the following contents.

The utility model discloses a mixed feeding buffer tank, which comprises a stirrer 1, a shell 2, a feeding port and a discharging port; the stirrer 1 is connected with the top of the shell 2, and the stirrer 1 comprises axial flow type curved surface wide blades and paddle type blades; the feed inlet is positioned at the top of the shell 2; the discharge hole is positioned at the bottom of the shell 2.

Fig. 1 is a schematic structural diagram of an embodiment of the mixed feed buffer tank of the present invention. In the present embodiment, the upper portion of the housing 2 has a column structure, and the lower portion of the housing 2 has a cone structure 5, but in other embodiments, the upper portion of the housing 2 may have other shapes, such as a cone shape, a rectangular parallelepiped shape, and the like, and similarly, the lower portion of the housing 2 may have other shapes, such as a column shape, a rectangular parallelepiped shape, and the like, and the present invention is not limited to the shapes of the upper portion and the lower portion of the housing 2.

In addition, the top of the shell 2 is also provided with a sealing opening N9 and a ventilation opening N10, wherein the sealing opening N9 is used for air pressure sealing, and the ventilation opening N10 is used for air draft and pressure reduction.

The stirring shaft of the stirrer 1 is connected with the top of the shell 2 through a flange, and the flange is sealed in a metal winding pad mode. As shown in fig. 1, in the present embodiment, the flange is designed to be oval according to the shape of the interface of the mixer 1, the present invention is not particularly limited to the shape of the flange, and in other embodiments, the user can design the flange to be corresponding according to the shape of the interface of the mixer 1. The inside of the flange is also provided with a cooling jacket (not shown) for cooling the material of the mixed feeding buffer tank. The sealing part between the stirrer 1 and the shell 2 is a double-end-face mechanical seal 12, and the double-end-face mechanical seal 12 has the characteristic of good sealing property, and is beneficial to heat preservation of materials in the shell 2.

The setting position of the stirrer 1 deviates from the axle center of the shell 2, and the setting of the position deviating from the axle center of the shell 2 can intensify the strength of a stirring flow field and ensure that the materials are mixed more uniformly. An axial flow type curved surface wide blade and a paddle type blade are sequentially arranged on a stirring shaft of the stirrer 1 from the top to the bottom of the shell 2. Preferably, the number of the axial flow type curved surface wide blades is 3 groups, and the number of the paddle type blades is 1 group. The stirrer 1 is connected with a sliding bearing 6 at one end close to the bottom of the shell 2, and a sliding bearing support 7 is arranged on the inner side of the cone structure 5 for supporting the sliding bearing 6. A cross-sectional view of the sliding bearing support 7 along the direction B of the present embodiment is shown in fig. 2, but the sliding bearing support 7 may take other forms in other embodiments, and the present invention is not particularly limited. The sliding bearing 6 can ensure that the stirrer 1 stably operates and reduce the noise, greatly reduces the friction loss and is beneficial to the long-term use of the mixed feeding buffer tank.

The feed inlets are positioned at the top of the shell 2 and comprise a catalyst feed inlet N1 and a material feed inlet N2, liquid fresh feed, liquid pressure-reducing circulating material and coke-containing solid particles enter the mixed feed buffer tank through the catalyst feed inlet N1, and liquid catalyst enters the mixed feed buffer tank through the material feed inlet N2. The left view of the material inlet N2 is schematically shown in FIG. 3, the material inlet N2 is fixed on the shell 2 by two brackets with an included angle of 60 degrees, the material inlet N2 is further connected with a pipeline 11, and the tail end of the pipeline 11 is close to the bottom of the shell 2. The pipeline 11 is connected with the shell 2 through a support frame 10 arranged on the inner wall of the shell 2, and the support frame 10 is used for supporting the weight of the pipeline 11 and preventing the pipeline 11 from being deformed or damaged due to long-term use under the action of the gravity. Fresh liquid feed, liquid depressurized recycle, coke-containing solid particles enter the bottom of the mixed feed surge drum through line 11. The stirrer 1 rotates to drive the axial flow type curved surface wide blade and the paddle type blade to rotate at a high speed to generate a rapid and powerful shearing effect, and the liquid fresh feeding, the liquid pressure reduction circulating material, the coke-containing solid particles and the liquid catalyst are stirred to be uniformly mixed, so that the homogeneous phase and temperature equalizing effect is achieved.

The discharge gate is located the bottom of casing 2, the discharge gate includes thick liquids discharge gate N3 and liquid discharge gate N8, thick liquids discharge gate N3 is located casing 2 columnar structure one side, liquid discharge gate N8 is located the 5 bottoms of cone structure, thick liquids discharge gate N3 still is equipped with vacuum pump mouth N4, thick liquids discharge gate N3 is used for the waste residue liquid to discharge, liquid discharge gate N8 is used for the discharge of mixed liquid, vacuum pump mouth N4 is vacuum pump circulation entry, the material of misce bene flows out from liquid discharge gate N8 and gets into follow-up process flow.

One side of the cone structure 5 is provided with a manhole 9 with a plug and a ladder 8, so that the mixed feeding buffer tank can be maintained or inspected regularly. One side of mixing the feeding buffer tank still is equipped with skirt 3, and the mixed feeding buffer tank supports through skirt 3 and frame. The outer wall of the shell 2 of the mixed feeding buffer tank is also provided with a plurality of reinforcing rings 4, and the number of the reinforcing rings 4 is not particularly limited by the utility model; the reinforcing ring 4 can increase the strength and rigidity of the feeding buffer tank, and prevent the feeding buffer tank from being unstable. In addition, one side of the shell 2 is also provided with pump receiving ports N5, N6 and N7 for receiving pump feeding.

As shown in fig. 1, N13 is the steam outlet, in addition, the utility model discloses still be provided with two other manholes M1, M2, the utility model discloses a mix feeding buffer tank can design for great volume to this increases mixed feeding volume, when mixed feeding buffer tank volume is great, manhole M1 is located the columnar structure on casing upper portion, and manhole M2 is located the cone structure of casing lower part, and manhole M1 is convenient for the maintenance of columnar structure, and manhole M2 is convenient for the maintenance of cone structure, with this makes things convenient for the maintainer operation.

The utility model discloses a feeding buffer tank adopts double mechanical seal, realizes the cooling and the lubrication of three level through the oil station, is the lubricated cooling of frame ring flange cooling, mechanical seal lower cavity cooling, mechanical seal quiet ring cavity respectively, ensures mechanical seal's even running. The stable operation of the stirrer is realized through the aligning effect of the speed reducer bearing, the frame bearing and the bottom sliding bearing.

To sum up, compare in prior art, the utility model has the advantages of it is following:

1. the utility model discloses a mix feeding buffer tank has mixing efficiency height, homogeneous phase and the effectual advantage of samming. The stirrer of the utility model is provided with 4 groups of blades, three groups of blades near the top of the shell are axial flow type curved surface wide blades, and the blades near the bottom of the shell are paddle type blades; the three groups of axial flow type curved surface wide blades enable fluid to move in a synthesis mode of axial rotation and axial movement, and meanwhile, the high-efficiency shearing and extruding effect of the axial flow type curved surface wide blades enables multiple materials to be uniformly mixed, so that the effects of homogeneous phase and temperature equalization are achieved.

2. The utility model discloses a mixed feeding buffer tank sealing performance is good, adopts double mechanical seal, realizes the direct contact heat transfer cooling of three level through the oil station (the oil station can provide the cooling and lubrication white oil), gets into frame ring flange cavity cooling, cooling and lubrication white oil respectively and gets into the lubricated cooling of mechanical seal lower cavity cooling, cooling and lubrication white oil mechanical seal quiet ring cavity, ensures mechanical seal's even running.

3. The utility model discloses a mixer swing of mixed feeding buffer tank is little, and the frame bearing (be located mechanical seal upper portion) and the plain bearing's of bottom aligning effect to this steady operation that realizes the agitator.

Naturally, the present invention can be implemented in other various embodiments, and various changes and modifications can be made by those skilled in the art without departing from the spirit and the essence of the present invention, but these changes and modifications should fall within the scope of the present invention defined by the appended claims.

Claims (8)

1. A hybrid feed surge tank, comprising:

a housing;

the stirrer is connected with the top of the shell and comprises an axial flow type curved surface wide blade and a paddle type blade;

the feeding hole is positioned at the top of the shell; and

the discharge hole is positioned at the bottom of the shell;

the stirrer is sequentially provided with three groups of axial flow type curved surface wide blades and one group of paddle type blades from the top to the bottom which are close to the shell.

2. The mixing feed surge tank of claim 1, wherein the feed inlets comprise a catalyst feed inlet and a material feed inlet, wherein the material feed inlet is connected with a pipeline, and the end of the pipeline is close to the bottom of the shell.

3. The hybrid feed surge tank of claim 1, wherein the outlet comprises a slurry outlet, a liquid outlet.

4. The hybrid feed surge tank of claim 1, wherein the upper portion of the housing is a cylindrical structure and the lower portion is a conical structure.

5. The mixing and feeding buffer tank of claim 1, wherein the stirrer is connected with the top of the shell through a flange, and a cooling jacket is arranged inside the flange.

6. The mixing feed surge tank of claim 1, wherein the agitator is offset from an axial center of the housing.

7. The mixing feed surge tank of claim 1, wherein a slide bearing is attached to the agitator proximate the bottom of the housing.

8. A compound feed surge tank in accordance with claim 1, wherein a double mechanical seal is provided between said agitator and said housing.

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