CN217248777U

CN217248777U - Gas phase distributor and reactor

Info

Publication number: CN217248777U
Application number: CN202220679633.XU
Authority: CN
Inventors: 周礼; 袁学伟; 田相龙
Original assignee: Aishengke Jiangsu Chemical Technology Co ltd
Current assignee: Aishengke Jiangsu Chemical Technology Co ltd
Priority date: 2022-03-26
Filing date: 2022-03-26
Publication date: 2022-08-23
Anticipated expiration: 2032-03-26

Abstract

The utility model relates to a be applied to fixed bed reactor and fluidized bed reactor's gaseous phase distributor, fixed bed reactor or fluidized bed reactor's catalyst upper end or catalyst lower extreme are provided with gaseous phase distributor, select according to the technological requirement, and gaseous phase distributor includes the inlet manifold and the branch road distribution trachea that is linked together with the inlet manifold, branch road distribution trachea sets up in the inlet manifold exit end, branch road distribution trachea is many, and each branch road distribution trachea's one end collects to the inlet manifold exit end, and the other end extends to the direction of keeping away from the trachea exit end, and a plurality of water conservancy diversion ventholes have evenly been seted up to each branch road distribution trachea bottom. The utility model has simple structure, small volume and small pressure drop; when the fluctuation of the gas treatment capacity in the reaction process is large, the gas can be effectively buffered, the gas velocity is prevented from being accelerated, the resistance in the reaction process is reduced, the increase of the pressure drop of the reactor is avoided, and the treatment capacity of the reactor is reduced.

Description

Gas phase distributor and reactor

The technical field is as follows:

the utility model relates to a reactor technical field especially relates to a gas phase distributor and install fixed bed reactor or fluidized bed reactor of this gas phase distributor.

The background art comprises the following steps:

the gas phase distributor is generally installed at the gas inlet end of the existing fixed bed reactor or fluidized bed reactor. The gas phase distributor has the function of uniformly distributing gas, so that the contact area of the gas and a catalyst or a reactant is increased, the volume of bubbles is reduced, the gas retention time and the mass transfer effect are ensured, and the conversion rate of the reaction is increased.

The types of gas phase distributors used in industrial production are many, and mainly include dense-pore plates, straight-flow nozzles, packing nozzles, side-flow nozzles, and swirl nozzles. The dense-pore plate has uniform gas distribution, is easy to block, is not easy to overhaul and has higher manufacturing cost, so the practicability is not high; the straight-flow distribution plate has a simple structure, is easy to design and manufacture, but the airflow direction is over against the bed layer, so that the bed layer is easy to form channeling, small holes are easy to block, and materials are easy to leak when the vehicle is stopped, so that the use is less; the filling type distribution plate has simple structure and easy manufacture, can meet the requirement of uniform gas distribution and has better fluidization quality. However, after long-term use, the filling layer can be loosened, thereby causing dislocation and reducing the gas distribution effect. The lateral flow type conical cap has the advantages of wide application and good effect, wherein the lateral slit type conical cap can not form a small dead zone at the top, the gas is tightly adhered to the plate surface of the distribution plate to be blown out, and the dead zone on the plate surface can be eliminated at a proper gas speed, so that the fluidization quality of a bed layer is greatly improved, and the phenomena of sintering and abrasion of the distribution plate can be avoided, thereby having wider application. Swirl nozzles are commonly used in coarse fluidized beds where gas production is not critical. The short pipe and the small hole at the lower part of the short pipe can prevent gas vortex, which is beneficial to uniform gas distribution and makes the operation of the fluidized bed stable. The multi-pipe type air flow distributor is a new type of distributor developed in recent years. Because the gas is ejected downwards, the dead zone of the bed layer can be eliminated, the problem of solid leakage does not exist, and the structure of uniform gas distribution or non-uniform gas distribution can be designed according to the process requirements. But the structure is complex and the occupied space is large. The gas distributor has low applicability in fixed bed reactors with small pipe diameter and large long diameter.

The gas phase distributor in the prior art has the following disadvantages:

1. the general small reactor has small diameter and can be installed without a proper distributor, so that a gas distributor is installed in the reactor, the reaction efficiency is poor, the conversion rate is low, reactors are required to be connected in series to improve the conversion rate, the design cost is high, and the energy consumption is high;

2. the traditional large-scale gas phase distributor has the problems of uneven gas distribution, channeling and short circuit in the reactor, and can reduce the contact area of gas and catalyst or liquid and reduce the mass transfer efficiency, thereby influencing the mass transfer effect, reducing the conversion rate of the reaction and reducing the production capacity;

2. the traditional gas distributor is applicable to a small range of gas treatment capacity, when the gas treatment capacity is increased, the gas flow rate is increased rapidly, the gas entering the reactor is accelerated, the bubble volume specification is large, the retention time is reduced, and the reaction efficiency is reduced; the gas flow velocity is increased, so that the pressure drop of the reactor is increased, and the process energy consumption is increased;

3. the traditional gas distributor is too large in size, difficult to install and not suitable for a fixed bed reactor with small pipe diameter and large length-diameter ratio.

The utility model has the following contents:

the utility model aims to solve the technical problem that a gas phase distributor is provided, be applicable to the fixed bed reactor that the pipe diameter is little, the draw ratio is big, can fine solve the great problem that is not suitable for with small-size distributor of traditional gas phase distributor size specification, can avoid traditional gas phase distributor easily to block up, the cost is high, the difficult scheduling problem of maintenance. Meanwhile, the gas can be uniformly distributed, the bubble volume is small, the dispersion effect is good, the retention time is long, the short circuit and channeling of the gas in the reactor are effectively avoided, the contact area and the contact time of the gas and the catalyst are improved, the utilization efficiency of the catalyst is increased, the conversion rate and the yield of the reaction are improved, and the industrial production capacity is greatly improved.

The utility model has simple structure, small volume and small pressure drop; when the fluctuation of the gas handling capacity in the reaction process is large, the gas can be effectively buffered, the gas speed is prevented from being accelerated, the resistance in the reaction process is reduced, and the pressure drop of the reactor is prevented from being increased, so that the handling capacity of the reactor is reduced, and the safety performance of the reactor is greatly influenced when a process involving dangerous gas in the reaction is encountered.

The utility model discloses a realize through following technical scheme:

the utility model provides a gas phase distributor, includes air intake manifold and the branch road distribution trachea that is linked together with air intake manifold, branch road distribution trachea sets up in air intake manifold exit end, branch road distribution trachea is many, and each branch road distribution trachea's one end collects to air intake manifold exit end, and the other end extends to the direction of keeping away from air intake manifold exit end, and a plurality of water conservancy diversion ventholes have evenly been seted up to each branch road distribution trachea's bottom.

In order to facilitate air inlet and air outlet, the air inlet main pipe comprises an air inlet end parallel to the horizontal plane and an air outlet end which is connected to the tail end of the air inlet end and is bent downwards and vertically, one end of each branch air distribution pipe is collected to the air outlet end, and resistance of air in the distributor or the main pipe is reduced.

The number of the branch gas distribution pipes, the number of the diversion gas outlet holes and the aperture can be designed and calculated according to different process requirements and treatment capacity. The utility model discloses an in the preferred embodiment, branch road distribution trachea is four, and four branch road distribution tracheas are cross range, the water conservancy diversion venthole is a style of calligraphy range along branch road distribution tracheal length direction. Each water conservancy diversion venthole keeps certain distance with air intake manifold to air intake manifold does not carry out the trompil in the bottom, ensures that gas dispersion is even.

In order to facilitate the processing and forming, the branch air distribution pipes are integrally formed to form a whole.

In order to seal the top ends of the branch air distribution pipes, the whole distributor is always kept in a micro-positive pressure state, the functions of all the flow guide air outlet holes are fully exerted, and a baffle is arranged at one end, away from the outlet end of the air inlet main pipe, of each branch air distribution pipe and is fixedly sealed by welding.

The utility model also provides a fixed bed reactor, including the reactor body, the inlet end of reactor body is provided with above-mentioned gas phase distributor.

The utility model has the advantages that:

(1) the unique gas inlet structure of the gas phase distributor changes the gas flow direction, has the effects of enabling the gas to be distributed more uniformly, and has good gas dispersion effect by introducing gas at each effective point of the cross section of the reactor, thereby effectively avoiding the short circuit and channeling of the gas in the reactor;

(2) the gas has certain buffer space in the gas phase distributor, the effect is to reduce the gas flow rate and reduce the pulse, the gas residence time in the reactor can be controlled in a reasonable range, the conversion rate and the yield of the reaction are improved, thereby improving the production capacity;

(3) the sizes of all parts of the gas phase distributor are adjustable, the gas phase distributor is suitable for various working conditions with large fluctuation of gas treatment capacity, and the application range is wider;

(4) the fixed bed reactor has an independent catalyst supporting structure, the gas phase distributor can be independently installed at the gas inlet end of the reactor, the gas phase distributor does not support the bed quality, the problem of catalyst blockage does not exist, the occupied space is small in size, and the maintenance is convenient.

Description of the drawings:

FIG. 1 is a front view of a gas phase distributor according to the present invention;

FIG. 2 is a top view of the gas distributor of the present invention;

fig. 3 is a schematic structural diagram of the fixed bed reactor of the present invention.

The specific implementation mode is as follows:

the following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc. refer to directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.

As shown in fig. 1 and fig. 2, the gas phase distributor includes an air inlet main 1 and a branch gas distribution pipe 2 communicated with the air inlet main 1.

Air inlet manifold 1 includes the inlet end that parallels with the horizontal plane and connects in the end of inlet end and the end of giving vent to anger of downward vertical buckling, can guarantee that gas flow downwards behind the gaseous gas phase distributor that gets into, branch road distribution trachea 2 sets up in air inlet manifold 1's the end of giving vent to anger, branch road distribution trachea 2 has four, four branch road distribution tracheas 2 are cross arrangement, the one end of each branch road distribution trachea 2 collects to air inlet manifold 1 exit end (the end of giving vent to anger), the other end extends to the direction of keeping away from air inlet manifold 1 exit end, and a plurality of water conservancy diversion ventholes 3 have evenly been seted up to the bottom of each branch road distribution trachea 2, water conservancy diversion venthole 3 is a style of calligraphy along the length direction of branch road distribution trachea 2 and arranges, the end lid that air inlet manifold exit end was kept away from to each branch road distribution trachea has closed baffle 4 to this changes the gas flow direction.

A fixed bed reactor as shown in fig. 3 comprises a reactor body a, and the gas phase distributor B is arranged at the gas inlet end (bottom end) of the reactor body a. The gas enters from the gas inlet main pipe, flows out from the lower part of the branch gas distribution pipe, then flows upwards to ensure that the gas is uniformly distributed, enters the reactor and eliminates the dead zone of the bed layer. When gas enters the branch gas distribution pipe from the gas inlet main pipe, the gas distribution pipe can play a role in buffering, the flow speed of the gas is reduced, the retention time is prolonged, and the reaction efficiency is improved.

It should be noted that the parts of the present invention not related to are the same as or can be implemented by using the prior art.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "disposed," "provided," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention.

Claims

1. A gas phase distributor, characterized by: including inlet manifold (1) and branch road distribution trachea (2) that are linked together with inlet manifold (1), branch road distribution trachea (2) set up in the exit end of inlet manifold (1), and branch road distribution trachea (2) are many, and the one end of each branch road distribution trachea (2) collects to inlet manifold (1) exit end, and the other end extends to the direction of keeping away from inlet manifold (1) exit end, and a plurality of water conservancy diversion ventholes (3) have evenly been seted up to the bottom of each branch road distribution trachea (2).

2. The gas phase distributor of claim 1, wherein: the air inlet main pipe (1) comprises an air inlet end parallel to the horizontal plane and an air outlet end which is connected to the tail end of the air inlet end and is bent downwards and vertically, and one end of each branch air distribution pipe (2) is converged to the air outlet end.

3. The gas phase distributor of claim 2, wherein: the number of the branch air distribution pipes (2) is four, and the four branch air distribution pipes (2) are arranged in a cross shape.

4. The gas phase distributor of claim 3, wherein: the branch air distribution pipes (2) are integrally formed.

5. The gas phase distributor of claim 4, wherein: the diversion air outlet holes (3) are arranged in a straight line along the length direction of the branch air distribution pipe (2).

6. The gas phase distributor of claim 5, wherein: one end of each branch gas distribution pipe (2) far away from the outlet end of the gas inlet main pipe (1) is covered with a baffle (4).

7. A reactor comprising a reactor body, characterized in that: the gas inlet end of the reactor body is provided with a gas phase distributor according to any one of claims 1 to 6.