CN220835471U

CN220835471U - Fixed bed reactor

Info

Publication number: CN220835471U
Application number: CN202322678334.1U
Authority: CN
Inventors: 戴华林; 丁亚莲; 薛宇阳
Original assignee: Jiangsu Ruifeng Polymer Materials Co ltd
Current assignee: Jiangsu Ruifeng Polymer Materials Co ltd
Priority date: 2023-10-08
Filing date: 2023-10-08
Publication date: 2024-04-26
Anticipated expiration: 2033-10-08

Abstract

The utility model relates to the field of chemical production, and provides a fixed bed reactor. Including the barrel, there is head and bottom plate seal at the both ends of barrel, and the inside catalyst granule that is equipped with of barrel, the bottom outside of barrel is equipped with horizontally and goes down the feed liquor pipe, and the one end that lower feed liquor pipe inserted in the barrel is connected with down the distribution pipe, and the center of head is equipped with vertical last feed liquor pipe, goes up the intraductal coaxial mounting of feed liquor and goes up the distribution pipe, through adopting the vertical axial feeding of upper distribution pipe and the radial feeding's of lower distribution pipe mode for two kinds of raw materials mix in opposite directions respectively from the bottom and the top of barrel and fully with the catalyst contact, ensure the homogeneity of mixing and the completion of reaction.

Description

Fixed bed reactor

Technical Field

The utility model relates to the field of chemical production, in particular to a fixed bed reactor.

Background

In the chemical production process, raw materials react in a reaction kettle under the catalysis of a catalyst to produce a finished product, and the raw materials are required to be continuously stirred in the reaction process so as to ensure the uniformity and completeness of the reaction. For the catalytic reaction of multiphase raw materials, such as the reaction of liquid phase and gas phase, or the reaction of liquid phase and oil phase, the stirring mode of a reaction kettle can not ensure the thorough mixing of the raw materials, and the generation of byproducts is easy to cause. Meanwhile, due to the existence of the catalyst, the catalyst is easy to follow the discharge from the feed inlet or the discharge outlet, and the purity of the final finished product is affected.

Disclosure of Invention

In order to meet the uniformity and completeness of catalytic reaction of multiphase raw materials in chemical production, the utility model aims to provide a fixed bed reactor.

In order to achieve the purpose, the utility model adopts the following technical scheme:

The fixed bed reactor comprises a cylinder body, wherein a sealing head is arranged at the top of the cylinder body, a bottom plate is arranged at the bottom of the cylinder body, sealing heads and bottom plates are arranged at the two ends of the cylinder body, catalyst particles are arranged in the cylinder body, a horizontal lower liquid inlet pipe is arranged at the outer side of the bottom of the cylinder body and inserted into the cylinder body, connecting flanges are respectively arranged at the two ends of the lower liquid inlet pipe, one end of the lower liquid inlet pipe inserted into the cylinder body is connected with a lower distribution pipe, the lower distribution pipe is horizontally arranged, liquid distribution holes are uniformly distributed on the lower distribution pipe, and the lower distribution pipe is positioned in the catalyst; the center of the seal head is provided with a vertical upper liquid inlet pipe, the upper liquid inlet pipe barrel body is communicated, the top end of the upper liquid inlet pipe is provided with a flange, an upper distribution pipe is coaxially arranged in the upper liquid inlet pipe, liquid distribution holes are uniformly distributed on the upper distribution pipe, and the upper distribution pipe is positioned above the catalyst; one side of the bottom of the cylinder body is provided with a liquid discharge pipe, the liquid discharge pipe is positioned below the lower distribution pipe, and one end of the liquid discharge pipe extending out of the cylinder body is provided with a flange.

Further, the outer sides of the upper distribution pipe and the lower distribution pipe are wrapped with at least one layer of filter screen.

Further, one ends of the upper distribution pipe and the lower distribution pipe far away from the liquid input are closed ends.

Further, an upper distribution pipe flange is arranged at the top end of the upper distribution pipe and is connected with the upper liquid inlet pipe through a flange, and a connecting pipe is arranged at the center of the upper distribution pipe flange.

Further, a manhole is arranged on the end socket.

Further, the base is installed to the below of bottom plate, the base includes skirt and basic ring, the skirt is the tubular structure that corresponds with the barrel, and the skirt welds in the bottom surface of bottom plate, and basic ring welds in the bottom surface of skirt, is equipped with the round mounting hole on the ring that the basic ring is located the skirt outside.

Further, a circle of uniformly distributed triangular rib plates are welded between the top surface of the foundation ring and the side surface of the skirt.

Further, the lowest point of the drain pipe hole is flush with the top surface of the bottom plate, and the drain pipe is inclined downwards from the bottom plate.

Further, one end of the liquid discharge pipe far away from the cylinder body is provided with a flange, a lower connecting pipe is connected with the liquid discharge pipe through the flange, and more than one layer of filter screen is arranged between the liquid discharge pipe and the lower connecting pipe.

Still further, the filter screen includes 60 mesh inlayer wire gauze and 20 mesh skin wire gauze.

After the technical scheme is adopted, the beneficial effects of the utility model are as follows:

By adopting the vertical axial feeding mode of the upper distribution pipe and the horizontal radial feeding mode of the lower distribution pipe, two raw materials are respectively mixed in opposite directions from the bottom and the top of the cylinder body and are fully contacted with the catalyst, and the uniformity of mixing and the completion of reaction are ensured. Through the setting of distributor for the raw materials evenly distributes in the barrel, through the double-deck steel wire filter screen of distributor and fluid-discharge tube department installation, avoid catalyst granule to get into the raw materials pipeline and follow the finished product output, guarantee the purity of product.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a top view of the present utility model.

In the figure: the device comprises a barrel body 1, a sealing head 2, a bottom plate 3, a skirt 4, a foundation ring 5, a lower liquid inlet pipe 6, a lower distribution pipe 7, a supporting lug plate 8, liquid distribution holes 9, an upper liquid inlet pipe 10, an upper distribution pipe 11, liquid distribution holes 12, a catalyst layer 13, an upper connecting pipe 14, a liquid discharge pipe 15, a lower connecting pipe 16, a stainless steel net 17 and a manhole 18.

Detailed Description

The following detailed description of the utility model refers to the accompanying drawings, which illustrate specific embodiments of the utility model:

As shown in fig. 1, a fixed bed reactor comprises a cylinder 1, wherein a sealing head 2 is arranged at the top of the cylinder 1, a bottom plate 3 is arranged at the bottom of the cylinder 1, and the cylinder 1 is sealed through the sealing head 2 and the bottom plate 3. A base is mounted below the bottom plate 3 for mounting and fixing the reactor. The base comprises skirt 4 and basic ring 5, and skirt 4 is the tubular structure that corresponds with barrel 1, and skirt 4 welds in the bottom surface of bottom plate 3, avoids barrel 1 and the direct contact on ground, and basic ring 5 welds in the bottom surface of skirt 4, and the diameter of basic ring 5 is greater than skirt 4, is equipped with the round mounting hole on the ring that basic ring 5 is located the skirt 4 outside, through mounting hole with reactor fixed mounting on equipment or platform. A circle of uniformly distributed triangular rib plates are welded between the top surface of the foundation ring 5 and the side surface of the skirt 4 and are used for reinforcing the structure.

The lower feed liquor pipe 6 is installed in the outside of barrel 1 bottom, lower feed liquor pipe 6 inserts in the barrel, the both ends of lower feed liquor pipe 6 are equipped with flange respectively, the one end that lower feed liquor pipe 6 inserted in the barrel is connected with down distribution pipe 7, lower distribution pipe 7 radially sets up along barrel 1, the one end that lower distribution pipe 7 kept away from lower feed liquor pipe is the blind end, support through support otic placode 8 on the barrel inner wall, guarantee the stability of body, the equipartition has distribution hole 9 on lower distribution pipe 7, lower feed liquor pipe feed liquor is through lower distribution pipe evenly distributed in the barrel.

The inside of the cylinder is provided with a catalyst layer 13 with a certain thickness, and the lower distribution pipe 7 is positioned in the catalyst layer 13, so that the raw materials entering the lower liquid inlet pipe 6 are ensured to be fully contacted with the catalyst.

The center of the seal head 2 at the top of the cylinder body 1 is welded with a vertical upper liquid inlet pipe 10, and a manhole 18 is arranged on the seal head 2 and is used for periodically cleaning and replacing the catalyst inside. The upper liquid inlet pipe 10 is communicated with the cylinder body 1, a flange is arranged at the top end of the upper liquid inlet pipe 10, an upper distribution pipe 11 is coaxially inserted into the upper liquid inlet pipe 10, the upper distribution pipe 11 is axially arranged along the cylinder body 1, an upper distribution pipe flange is arranged at the upper end of the upper distribution pipe 11, the upper distribution pipe flange is connected with the flange of the upper liquid inlet pipe 10 in a matched manner, liquid distributing holes 12 are uniformly distributed on the upper distribution pipe 11, and one end of the upper distribution pipe 11 far away from the upper liquid inlet pipe is a closed end. The upper distribution pipe 11 is located above the catalyst layer 13. An upper connecting pipe 14 is welded at the center of the upper distribution pipe flange, and the upper connecting pipe 14 is communicated with the upper distribution pipe 11.

In the reaction process, the raw materials with high density enter the cylinder 1 from the upper distribution pipe 11, the raw materials with low density or gas raw materials enter the cylinder 1 from the lower distribution pipe 7, and the two raw materials are mixed in opposite directions and fully contacted with the catalyst, so that the reaction is ensured to be complete.

A liquid discharge pipe 15 is welded on the outer side of the bottom of the cylinder body 1, the liquid discharge pipe 15 is communicated with the cylinder body 1, and the liquid discharge pipe 15 is positioned below the lower distribution pipe 7. The lowest point of the pipe hole of the liquid discharge pipe 15 is flush with the top surface of the bottom plate 3, so that the liquid discharge pipe 15 can be completely discharged, and the liquid discharge pipe 15 is inclined downwards by 45 degrees from the bottom plate, so that liquid discharge can be performed quickly, and surplus liquid accumulation in the liquid discharge pipe 15 is avoided. The drain pipe 15 is provided with a flange at one end far away from the outside of the cylinder 1, and is connected with a lower connecting pipe 16 through the flange.

In order to avoid the entry of catalyst particles into the individual liquid inlet pipes and liquid outlet pipes 15, two layers of stainless steel mesh 17 are wrapped on the outer sides of the upper distribution pipe 11 and the lower distribution pipe 7, the mesh of the stainless steel mesh on the inner side is 60 meshes, and the mesh of the stainless steel mesh on the outer side is 20 meshes. Two layers of stainless steel mesh are also arranged between the drain pipe 15 and the flange of the lower connecting pipe 16, the mesh is 60 meshes, or one layer of mesh is 20 meshes, and the other layer is 60 meshes.

In the production of different chemical products, the reactor of the fixed bed can adopt different input and output modes, for example, when solid-liquid reaction is carried out, solid raw materials can be used as a catalyst layer, liquid raw materials enter from the lower distribution pipe 7, and overflow from the upper distribution pipe 11 or are discharged from the liquid discharge pipe 15 after the reaction is completed.

Claims

1. The fixed bed reactor comprises a cylinder body, wherein a sealing head is arranged at the top of the cylinder body, a bottom plate is arranged at the bottom of the cylinder body, and sealing heads and bottom plates are arranged at the two ends of the cylinder body; the center of the seal head is provided with a vertical upper liquid inlet pipe, the upper liquid inlet pipe barrel body is communicated, the top end of the upper liquid inlet pipe is provided with a flange, an upper distribution pipe is coaxially arranged in the upper liquid inlet pipe, liquid distribution holes are uniformly distributed on the upper distribution pipe, and the upper distribution pipe is positioned above the catalyst; one side of the bottom of the cylinder body is provided with a liquid discharge pipe, the liquid discharge pipe is positioned below the lower distribution pipe, and one end of the liquid discharge pipe extending out of the cylinder body is provided with a flange.

2. A fixed bed reactor according to claim 1, wherein the outer sides of the upper distribution pipe and the lower distribution pipe are wrapped with at least one layer of filter screen.

3. A fixed bed reactor as claimed in claim 1, wherein the ends of the upper and lower distribution pipes remote from the liquid inlet are closed ends.

4. A fixed bed reactor according to claim 1, wherein the top end of the upper distribution pipe is provided with an upper distribution pipe flange and is connected with an upper liquid inlet pipe through a flange, and a connecting pipe is arranged at the center of the upper distribution pipe flange.

5. A fixed bed reactor as claimed in claim 1, wherein the closure head is provided with a manhole.

6. The fixed bed reactor according to claim 1, wherein a base is installed below the bottom plate, the base comprises a skirt and a base ring, the skirt is of a cylindrical structure corresponding to the cylinder, the skirt is welded on the bottom surface of the bottom plate, the base ring is welded on the bottom surface of the skirt, and a circle of mounting holes are formed in a circular ring, which is located on the outer side of the skirt, of the base ring.

7. The fixed bed reactor according to claim 6, wherein a circle of uniformly distributed triangular rib plates are welded between the top surface of the base ring and the side surface of the skirt.

8. A fixed bed reactor as claimed in claim 1, wherein the lowest point of the drain pipe hole is flush with the top surface of the bottom plate, and the drain pipe is inclined downward from the bottom plate.

9. The fixed bed reactor according to claim 8, wherein the drain pipe is provided with a flange at one end far away from the cylinder body and is connected with a lower connecting pipe through the flange, and more than one filter screen is installed between the drain pipe and the lower connecting pipe.

10. A fixed bed reactor according to claim 2 or 9, wherein the filter screen comprises an inner layer of 60 mesh steel mesh and an outer layer of 20 mesh steel mesh.