CN115161061A

CN115161061A - Distribution device

Info

Publication number: CN115161061A
Application number: CN202210291221.3A
Authority: CN
Inventors: 田永成; 张世成; 顾月章
Original assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-10-11

Abstract

The invention discloses a distribution device. The distribution device comprises branch pipes, nozzles, branch pipes, a tortoise shell net and a lining; the branch pipe is a flat steel pipe, the flat steel pipe branch pipe is formed by extruding a seamless steel pipe, and the lower bottom surface of the flat steel pipe branch pipe is provided with staggered hole-opening welding nozzles according to the required nozzle arrangement intervals; the branch pipe can be a circular pipe, a rectangular pipe or a flat steel pipe, and nozzles are arranged at the bottom of the branch pipe according to the required spacing of nozzle arrangement for uniform medium distribution; and welding the flat steel pipe branch pipes to the branch pipes at required intervals, welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes, and then coating a high-wear-resistant lining to prevent the medium from quickly wearing the distribution device. By adopting the flat steel pipe branch pipe and the branch pipe, the flow area of the medium outside the distribution device passing through the distribution device can be increased, the pressure drop of the medium passing through the distribution device is reduced, and the abrasion of the high-wear-resistant lining on the outer surface of the distribution device is reduced.

Description

Distribution device

Technical Field

The invention belongs to the field of petroleum processing, and relates to a gas mixing and distributing device for a reactor, in particular to a distributing device.

Background

At present, in a catalytic cracking device of petrochemical industry, media of a plurality of reactors, regenerators and containers need to be uniformly distributed, the media need to be distributed more uniformly through a media distribution device, and the branch-shaped distribution device is a common distribution device.

The existing branch distribution device mainly comprises a circular branch pipe and a circular branch pipe.

The branch pipe applied to the petrochemical industry is formed by processing a circular seamless steel pipe, nozzles are welded on the branch pipe according to a certain distance, but the longitudinal cutting area and the transverse cutting area of the seamless steel pipe with a certain length are fixed, and the larger the flow area in the branch pipe is when the total amount of a medium is fixed, the more the nozzles can be arranged. If the diameter of the branched pipe seamless steel pipe is increased, the ratio of the whole distribution device to the cross section area of the equipment is higher, the flow area in the pipe is increased, but the medium passing area outside the pipe is reduced, so that the pressure drop of the medium passing through the distribution device is large, the medium outside the distribution device passes through the distribution device at high flow speed to cause serious abrasion of a high-wear-resistant lining on the surface of the distribution device, the energy consumption and the normal operation of the device are directly influenced, and the production is stopped for repairing when the abrasion is serious.

Patent CN202023081011.7 provides a main air distributing pipe for catalytic cracker regenerator, is provided with the branch pipe on main air pipe, branch pipe, bleeder and the nozzle main air pipe, and four branch pipes evenly set up along the main air pipe, and the left and right sides symmetry of branch pipe is provided with the bleeder, and the left and right sides of bleeder evenly is provided with a plurality of nozzles. However, the scheme can only realize that the nozzles are uniformly distributed along the bed layer, and because the areas of the branch pipes and the branch pipes cannot be accurately adjusted, the flow through all the nozzles can not be basically kept the same, and the uniform distribution of media along the bed layer can not be realized actually, the medium throughput of some nozzles is large, the medium throughput of some nozzles is small, and even external media can return to the interior of the branch pipes through the nozzles to block the branch pipes; although the connecting plates are arranged between the branch pipes on each side of the branch pipes, the circular branch pipes and the branch pipes have limited ability to resist vibration in the medium flow due to the bending resistance and rigidity limitations of the circular branch pipes and the branch pipes, and the steel distribution pipes are worn through by the catalyst quickly after the surface lining is broken off by vibration. If the diameter of the dense phase of the distribution pipe is small, and the air flow is large, the distribution pipe occupies a large dense phase area, and the medium passes through the distribution pipe at a high speed, so that the pressure drop of a bed layer is large, the distribution pipe is seriously abraded, the distribution pipe is seriously vibrated, the long-period stable operation of the device is difficult to realize, and even the device cannot operate.

Disclosure of Invention

The invention provides a distribution device, aiming at solving the problems that the medium is not uniformly distributed by the distribution device, the pressure drop of the medium passing through the distribution device is large, the flow velocity of the medium outside the distribution device passing through the distribution device is high, so that the wear of a high-wear-resistant lining on the outer surface of the distribution device is serious, the bending resistance and the rigidity of a branched pipe are insufficient, the vibration damage is easy, and the like.

The invention provides a distribution device, which comprises branch pipes, nozzles, branch pipes, a tortoise shell net and a lining; the branched pipe is a flat steel pipe, the flat steel pipe branched pipe is formed by extruding a seamless steel pipe, and the nozzles are formed by opening and welding the lower bottom surface of the flat steel pipe branched pipe in a staggered mode according to the required spacing of the nozzle arrangement; the branch pipe can be a round pipe, a rectangular pipe or a flat steel pipe, and nozzles are arranged at the bottom of the branch pipe according to the required spacing of the nozzle arrangement for uniform medium distribution; and welding the flat steel pipe branch pipes to the branch pipes at required intervals, welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes, and then coating a high-wear-resistant lining to prevent the medium from quickly wearing the distribution device.

As an improved scheme, the branch pipe of the flat steel pipe is formed by rolling a steel plate and then performing extrusion forming.

As a further improved scheme, the branch pipe is a round pipe formed by rolling a steel plate.

As a further improvement, the branch pipe is a rectangular pipe formed by welding steel plates, and the ratio of the length to the width is not more than 2.5.

As a further improved scheme, the branch pipe is a flat steel pipe which is formed by rolling, welding and extruding a steel plate.

As the scheme of further improvement, the distribution device further comprises a main pipe, a connecting plate is arranged between the branch pipes, a supporting pipe is arranged below each branch pipe, the tail ends of the branch pipes are communicated with the main pipe, the branch pipes can be supported, more media can be conveyed to the tail ends of the branch pipes, and the branch pipes can better play a role in preventing the vibration of the distribution pipes after being reinforced by the supporting pipes.

The invention is applied to process equipment of various devices including but not limited to petrochemical industry catalytic cracking, coal chemical industry methanol-to-olefin and the like for medium distribution.

The working principle of the distribution device provided by the invention is as follows:

the medium is uniformly distributed through the main pipe, the branch pipe and the nozzle and then uniformly contacts with the catalyst in the bed layer, so that the requirements of medium reaction or catalyst regeneration and the like are met. The distribution pipe branch pipe, the branch pipe are uniformly distributed by the medium in the distribution device, so that the process production requirement is better met.

The invention has the following beneficial effects:

1) By adopting the flat steel pipe branch pipe and the branch pipe, the cross section area of the branch pipe can be adjusted by extruding the seamless steel pipe, so that the flow area in the branch pipe can be adjusted, the medium flow of the single nozzle of the flat steel pipe branch pipe can be adjusted to be approximately consistent, and the medium of the distribution device can be distributed more uniformly;

2) By adopting the flat steel pipe branch pipes and the branch pipes, the flow area of the medium outside the distribution device passing through the distribution device can be increased, the pressure drop of the medium passing through the distribution device is reduced, and the abrasion of the high-wear-resistant lining on the surface of the distribution device is reduced;

3) The branch pipes are changed into square pipes, the branch pipes are changed into flat steel pipes, the bending resistance and rigidity of the branch pipes and the branch pipes can be increased, the vibration amplitude of the branch pipes is reduced, the lining is prevented from cracking and falling off, the service life of the distribution device is prolonged, and the effect can be better by arranging the connecting plates between the branch pipes.

4) The supporting pipe is arranged below each branch pipe, so that the main pipe is communicated with the tail end of each branch pipe, the branch pipes can be supported, more media can be conveyed to the tail ends of the branch pipes, the branch pipes can better prevent the vibration of the distribution pipes after being reinforced by the supporting pipes, and the service life of the distribution device is further prolonged.

Drawings

FIG. 1 is a schematic view of a distribution device according to the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a schematic view of the long pipe structure in fig. 3.

In the figure: 1-branch pipe, 2-nozzle, 3-branch pipe, 4-tortoise shell net, 5-lining, 6-support pipe, 7-connecting plate and 8-main pipe.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the distribution device comprises a branch pipe 1, a nozzle 2, a branch pipe 3, a tortoise-shell net 4 and a lining 5; the branched pipe 1 is a flat steel pipe, the flat steel pipe branched pipe is formed by extruding a seamless steel pipe, and the lower semicircular pipe is provided with staggered hole-opening welding nozzles according to the distance required by nozzle arrangement; the branch pipe 3 can be a round pipe, a rectangular pipe or a flat steel pipe, and nozzles are arranged at the bottom of the branch pipe according to the required intervals for arranging the nozzles for uniform medium distribution; and welding the flat steel pipe branch pipes to the branch pipes at required intervals, welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes, and then coating a high-wear-resistant lining to prevent the medium from quickly wearing the distribution device.

The flat steel pipe branch pipe can be formed by extruding a seamless steel pipe or formed by rolling, welding and molding a steel plate; the branch pipe can be a round pipe formed by rolling a steel plate or a rectangular pipe or a flat steel pipe welded by the steel plate; set up connecting plate 7 between the bleeder, set up stay tube 6 under every branch pipe, make and be responsible for 8 and the terminal UNICOM of branch pipe 3, can play the support branch pipe and carry more media to the branch pipe end, branch pipe can be better after the stay tube reinforcement prevent the vibrating action of distribution pipe.

The flow area inside the branch pipe of the flat steel pipe is increased, so that the number of arranged nozzles is increased; under the condition of guaranteeing that flow area is the same with seamless steel pipe in the lateral conduit, multiplicable distribution device outer medium passes through distribution device flow area, the medium reduces and distribution device exterior high wear-resisting lining wearing and tearing reduce through distribution device pressure drop, increase the bending resistance and the rigidity of lateral conduit, it can make the effect better to set up the connecting plate between the cooperation lateral conduit, reduce lateral conduit vibration amplitude, it bursts and drops to reduce the lining, set up stay tube 6 under every branch pipe, make and be responsible for 8 and 3 terminal UNICOM of branch pipe, can play support branch pipe 3 and to 3 terminal more mediums of branch pipe, branch pipe 3 can be better prevent distribution pipe vibration effect after the stay tube reinforcement, thereby make distribution device life increase, reduce the number of times of parking overhauls, make the long period steady operation of device.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof in any way. Any person skilled in the art, having the benefit of the present disclosure, will recognize equivalent examples of changes and modifications as may be made without departing from the scope of the invention. Any equivalent changes made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, unless departing from the content of the technical solution of the present invention.

Claims

1. A distribution device, characterized by: the distribution device comprises branch pipes, nozzles, branch pipes, a tortoise shell net and a lining; the branch pipe is a flat steel pipe, the flat steel pipe branch pipe is formed by extruding a seamless steel pipe, and the lower bottom surface of the flat steel pipe branch pipe is provided with staggered hole-opening welding nozzles according to the required nozzle arrangement intervals; the branch pipes are round pipes, rectangular pipes or flat steel pipes, and nozzles are arranged at the bottoms of the branch pipes at intervals required by nozzle arrangement; and welding the flat steel pipe branch pipes to the branch pipes at required intervals, and coating a high-wear-resistance lining after welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes to prevent a medium from quickly wearing the distribution device.

2. The distribution device according to claim 1, wherein: and the branch pipe of the flat steel pipe is formed by rolling a steel plate and then performing extrusion forming.

3. The distribution device according to claim 1, wherein: the branch pipe is a rectangular pipe formed by welding steel plates, and the ratio of the length to the width is not more than 2.5.

4. The distribution device according to claim 1, wherein: the branch pipe is a flat steel pipe extruded after being rolled, welded and formed by a steel plate.

5. The distribution device according to claim 1, wherein: the distribution device further comprises a main pipe, a connecting plate is arranged between the branch pipes, a supporting pipe is arranged under each branch pipe, the main pipe is communicated with the tail ends of the branch pipes, the branch pipes can be supported, more media can be conveyed to the tail ends of the branch pipes, and the vibration of the distribution pipes can be better prevented by the branch pipes after the branch pipes are reinforced by the supporting pipes.