CN214076564U

CN214076564U - Catalyst filling device

Info

Publication number: CN214076564U
Application number: CN202022317926.7U
Authority: CN
Inventors: 张�成; 杨刚; 关月明; 袁胜华; 王志武; 蒋淑娇
Original assignee: China Petroleum and Chemical Corp; Sinopec Dalian Research Institute of Petroleum and Petrochemicals
Current assignee: Sinopec Dalian Petrochemical Research Institute Co ltd; China Petroleum and Chemical Corp
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-08-31
Anticipated expiration: 2030-10-19

Abstract

The utility model discloses a catalyst loading device for fixed bed reactor's catalyst loads, include: the blanking unit consists of a blanking pipe and a storage bin, and the blanking pipe extends into the storage bin and is used for conveying granular solid catalysts; the air supply unit is arranged on the outer side wall of the storage bin and used for conveying compressed air to the bottom of the storage bin; the material distribution unit is connected with the bottom of the storage bin in a smooth transition mode through a curved surface; the outlet of the distributing unit is of a wide-mouth structure and is communicated with the air supply unit. The utility model discloses a catalyst loads device can ensure that catalyst loading density keeps unanimous radially and vertically, is particularly useful for loading of upper portion catalyst in the reactor, and catalyst loading density controllable range is great.

Description

Catalyst filling device

Technical Field

The utility model relates to a petroleum refining field, in particular to fixed bed reactor's catalyst loading device.

Background

The reactors in the petroleum refining industry are usually fixed bed reactors, and granular catalysts are filled into the reactors according to a certain filling mode and a certain sequence. At present, the catalyst loading mode in industry is generally two modes of common loading (bag loading, sparse phase loading) and dense phase loading. The common filling is a filling mode that the catalyst flows into a catalyst material layer in the reactor from a hopper positioned at the upper part of the reactor through a canvas bag connected with a discharge port at the bottom of the hopper, and is manually and uniformly thrown on a material surface by a material distributor standing on the material layer. The common filling mainly depends on gravity as the power for catalyst distribution, generally, the higher the height is, the higher the speed of the catalyst leaving the bottom bag opening of the sailcloth bag is, and the higher the filling density is. The packing density decreases with the rise of the charge level, and when the catalyst leaves the bag mouth at a certain height, the catalyst cannot be thrown to the edge of the wall of the reactor at the speed of leaving the bag mouth, and the catalyst needs to be leveled by manpower. Important criteria for measuring the loading quality of a catalyst are the loading density and uniformity. The common filling mainly depends on manual work to finish material distribution, the uniformity of the catalyst filling process in the radial direction is relatively poor, the density is from high to low from bottom to top along the axial direction of the reactor, and the density is not uniform from top to bottom. The dense phase filling device is adopted to fill the catalyst, so that the catalyst can be distributed uniformly in the radial direction and the longitudinal direction, the filling density of the catalyst reaches a higher level, the catalyst is filled in the reactor more, the weight airspeed is reduced, the catalyst bed layer is filled uniformly and tightly and uniformly, the phenomena of bed layer collapse, channeling and the like can be avoided, and the generation of 'hot spots' is avoided. The radial temperature of the catalyst bed layer is uniform, and the reaction selectivity can be improved. However, not all catalysts are suitable for dense packing and some catalysts must be packed in the conventional manner.

At present, during ordinary filling, an operator stands on the catalyst material surface in the reactor, directly grasps the canvas bag opening or the plastic steel-plastic pipe to carry out material distribution, and the material distribution effect is directly related to the height from the material surface to the flange opening at the top of the reactor and is closely related to the operation method of the material distributor. The filling quality is difficult to control. Chinese patent CN207478537U discloses a catalyst loading device and a fixed bed reactor containing the same, the device comprises a cylinder support, an outer surface and a connecting member, the outer surface is fixed on the cylinder support through the connecting member, so that the device has a hollow cylinder structure, and the minimum distance of the cross section of the inner space formed by the cylinder structure is greater than or equal to the maximum distance of the cross section of the body of an operator. Although the device of the scheme can effectively improve the flatness of the catalyst in the filling process, improve the labor operation conditions and greatly improve the filling efficiency, the filling density of the catalyst is uncontrollable and can not ensure that the filling density of a single catalyst is consistent in the radial direction and the longitudinal direction.

Therefore, there is a need for a catalyst loading apparatus that can be used in a conventional loading method to improve loading efficiency and ensure uniform loading density in the radial and longitudinal directions.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an use catalyst loading device of ordinary filling method can ensure that catalyst packing density keeps unanimous radially and vertically, is particularly useful for filling of upper portion catalyst in the reactor, and catalyst packing density controllable range is great.

In order to achieve the above object, the utility model provides a catalyst filling device for fixed bed reactor's catalyst is filled, include: the blanking unit consists of a blanking pipe and a storage bin, and the blanking pipe extends into the storage bin and is used for conveying granular solid catalysts; the air supply unit is arranged on the outer side wall of the storage bin and used for conveying compressed air to the bottom of the storage bin; the material distribution unit is connected with the bottom of the storage bin in a smooth transition mode through a curved surface; the outlet of the distributing unit is of a wide-mouth structure and is communicated with the air supply unit.

Further, in the above technical scheme, the material distribution unit can be a fan-shaped distributor, and the granular solid catalyst is thrown onto the catalyst charge surface through the fan-shaped distributor.

Furthermore, among the above-mentioned technical scheme, can set up the guide plate that is used for even cloth in the fan-shaped distributor, guide plate quantity is at least two and its extending direction is perpendicular with the sector pitch arc of fan-shaped distributor.

Furthermore, in the above technical scheme, a blanking adjusting baffle is arranged at the smooth transition joint of the fan-shaped distributor and the storage bin and at the position opposite to the air supply unit.

Further, among the above-mentioned technical scheme, storage silo and fan-shaped distributor are integrated into one piece structure.

Further, among the above-mentioned technical scheme, the storage silo passes through the buckle with the integrated into one piece structure of fan-shaped distributor and is connected on the unloading pipe and rotatable for the unloading pipe.

Further, among the above-mentioned technical scheme, buckle department is equipped with the ball bearing of cover setting on the unloading pipe, and through this ball bearing, the integrated into one piece structure of storage silo and fan-shaped distributor can 360 degrees rotations for the unloading pipe.

Furthermore, in the above technical scheme, the ball bearing is connected with an elastic sling at both sides, and an arched handle for rotating and holding is installed at the lower end of the elastic sling.

Further, among the above-mentioned technical scheme, the buckle can set up 200 to 500mm position in blanking pipe bottom portion export top.

Furthermore, in the above technical scheme, the air supply unit is an air delivery pipe, and an air volume adjusting valve is arranged in the air delivery pipe.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the catalyst particles can be thrown in a fan shape by adopting the fan-shaped distributor, so that the bias flow phenomenon caused by uneven catalyst loading density in the radial direction is avoided;

2) auxiliary power or all power is provided by wind power to accelerate catalyst particles, so that the condition of high and low catalyst loading density caused by different heights is avoided;

3) the height and the dead weight of the catalyst can be fully utilized to obtain higher speed at the bottom of the reactor, the height is reduced along with the rising of the charge level, the wind power auxiliary power can be gradually increased, and the opening degree of a blanking adjusting baffle is adjusted, so that the speed of the catalyst leaving the fan-shaped distributor is increased, and the material distribution effect and the stable catalyst loading density are ensured;

4) the problem that the catalyst loading density is gradually reduced due to the reduction of the height in the process of loading the catalyst at the middle upper part of the reactor, and even the catalyst needs to be leveled up manually at the topmost part can be effectively solved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means more comprehensible, and to make the above and other objects, technical features, and advantages of the present invention easier to understand, one or more preferred embodiments are listed below, and the following detailed description is given with reference to the accompanying drawings.

Drawings

Figure 1 is a side view of the catalyst loading apparatus of the present invention.

Fig. 2 is a plan view of the catalyst loading device of the present invention.

Description of the main reference numerals:

1-a storage bin, 2-a fan-shaped distributor, 21-a distributor guide plate, 3-an air delivery pipe, 31-an air volume adjusting valve, 4-a catalyst feeding pipe, 5-a buckle, 6-a ball bearing, 7-an elastic sling, 8-an arched handle and 9-a blanking adjusting baffle.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.

The utility model discloses a catalyst loading device is used for fixed bed reactor's catalyst to load, including unloading unit, air supply unit and cloth unit. The blanking unit consists of a blanking pipe 4 and a storage bin 1, and the blanking pipe 4 extends into the storage bin 1 and is used for conveying granular solid catalysts. The feeding pipe 4 can be a plastic steel wire pipe which is connected to a hopper at the top of the reactor. The air supply unit is arranged on the outer side wall of the storage bin 1 and used for conveying compressed air to the bottom of the storage bin 1, the compressed air can be provided by an air compressor, and the air supply unit is an air conveying pipe 3 and can adjust air volume through an air volume adjusting valve 31. The cloth unit adopts the smooth transition of curved surface to be connected with 1 bottom of storage silo, and the cloth unit export be wide-mouthed structure and with air supply unit intercommunication, the distribution area when wide-mouthed structure can make the catalyst ejection of compact is bigger, is favorable to the homogeneity of loading. Preferably, but not limitatively, the distribution unit may be a fan distributor 2 or a wide-mouth structure like a trapezoid, and the granular solid catalyst is thrown through the fan distributor 2 onto the catalyst level. Further, the fan-shaped distributor 2 may be provided therein with at least two baffles 21 for uniform distribution (two baffles are provided in the embodiment of fig. 2), and the extending direction of the baffles 21 is perpendicular to the arc of the fan surface of the fan-shaped distributor 2. The utility model discloses provide auxiliary power or whole power with the help of wind-force and accelerate the catalyst particle, avoided the high difference to lead to the catalyst to load the condition of low-level down under the density. The height and the dead weight of the catalyst can be fully utilized to obtain higher speed at the bottom of the reactor, the height is reduced along with the rising of the charge level, and the speed of the catalyst leaving the fan-shaped distributor 2 can be increased by gradually increasing the wind power auxiliary power, so that the material distribution effect and the stable catalyst filling density are ensured.

As further shown in fig. 1, the storage bin 1 and the fan-shaped distributor 2 are integrally formed, the integrally formed structure of the storage bin 1 and the fan-shaped distributor 2 is connected to the feeding pipe 4 through a buckle 5 and is rotatable relative to the feeding pipe 4, and the buckle can be arranged at a position 200 to 500mm above the outlet at the bottom of the feeding pipe. Specifically, as shown in fig. 1, a ball bearing 6 sleeved on the discharging pipe 4 is arranged at the lower part of the buckle 5, and through the ball bearing 6, the integrally formed structure of the storage bin 1 and the fan-shaped distributor 2 can rotate 360 degrees relative to the discharging pipe 4, so that an operator can freely adjust the angle of the fan-shaped distributor 2. Preferably, but not limitatively, as further shown in fig. 1 and 2, in order to facilitate the holding of the operator during the angle adjustment, two elastic slings 7 are respectively connected to both sides of the ball bearing 6, and the lower ends of the two elastic slings 7 are respectively provided with an arc-shaped handle 8 for rotating the handle.

A blanking adjusting baffle 9 is arranged at the smooth transition joint of the fan-shaped distributor 2 and the storage bin 1 and at the opposite side position (namely the right side wall in the figure 1) of the air conveying pipe 3. When the air quantity from the air delivery pipe 3 is constant and the opening degree of the blanking adjusting baffle 9 is constant, the throwing state of the catalyst can be kept relatively stable; along with the rising of the charge level, when the speed of the catalyst at the outlet of the distributor needs to be increased, the opening degree of the blanking adjusting baffle 9 can be adjusted while the air quantity is increased, and the catalyst is guided to approach the bottom of the air conveying pipe 3. The utility model discloses a fan-shaped distributor can make the catalyst granule be the sector and shed, has avoided the catalyst uneven density that loads in the footpath to lead to the bias current phenomenon to take place. Meanwhile, the problem that the catalyst loading density is gradually reduced due to the reduction of the height in the process of loading the catalyst at the middle upper part of the reactor, and even the catalyst needs to be leveled up manually at the topmost part can be effectively solved.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.

Claims

1. A catalyst loading apparatus for catalyst loading of a fixed bed reactor, comprising:

the blanking unit consists of a blanking pipe and a storage bin, and the blanking pipe extends into the storage bin and is used for conveying granular solid catalysts;

the air supply unit is arranged on the outer side wall of the storage bin and used for conveying compressed air to the bottom of the storage bin;

the material distribution unit is connected with the bottom of the storage bin in a smooth transition mode through a curved surface; the outlet of the distributing unit is of a wide-mouth structure and is communicated with the air supply unit.

2. The catalyst loading apparatus according to claim 1, wherein the distribution unit is a fan distributor through which the particulate solid catalyst is thrown onto the catalyst bed.

3. The catalyst loading apparatus of claim 2 wherein the fan distributor is provided with at least two baffles for uniform distribution, the baffles extending in a direction perpendicular to the arc of the fan distributor.

4. The catalyst loading device according to claim 2, wherein a blanking adjusting baffle is arranged at the smooth transition joint of the fan-shaped distributor and the storage bin and at the position opposite to the air supply unit.

5. The catalyst loading apparatus of claim 2, wherein the storage bin is of unitary construction with the fan distributor.

6. The catalyst loading apparatus of claim 5 wherein the integral structure of the storage bin and the fan distributor is connected to the feed pipe by a snap fit and is rotatable relative to the feed pipe.

7. The catalyst loading apparatus of claim 6 wherein the snap-fit is provided with a ball bearing that fits over the down pipe, whereby the integral structure of the storage bin and the fan distributor is rotatable 360 degrees relative to the down pipe.

8. The catalyst loading apparatus of claim 7 wherein the ball bearings are flanked by elastic slings having lower ends fitted with arcuate handles for pivoting gripping.

9. The catalyst loading apparatus of claim 6 wherein the catch is disposed 200 to 500mm above the bottom outlet of the blanking tube.

10. The catalyst loading apparatus according to claim 6, wherein the air supply unit is an air delivery pipe having an air volume adjusting valve therein.