CN213286763U

CN213286763U - A fluidized bed for production of tetrachloro terephthalonitrile

Info

Publication number: CN213286763U
Application number: CN202021883027.7U
Authority: CN
Inventors: 李峰; 徐达利
Original assignee: Jiangxi Xinzhen Technology Co ltd
Current assignee: Jiangxi Xinzhen Technology Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-05-28
Anticipated expiration: 2030-09-01

Abstract

The utility model discloses a fluidized bed for tetrachloroterephthalonitrile production, which comprises a reaction tank and an air inlet system, wherein a lower grid plate close to the tail end and an upper grid plate close to the top end are arranged in the reaction tank, and the area between the lower grid plate and the upper grid plate is a reaction area; the inner wall of the reaction zone is annularly provided with a heating chamber; the air inlet system comprises an air inlet pipe vertically penetrating from the center of the bottom of the reaction tank to the upper part in the reaction zone, an air pump communicated with the outside of the air inlet pipe and an injection nozzle arranged at the top end of the air inlet pipe, wherein a flow guide baffle is arranged above the injection nozzle, is in an inverted V shape, and has an opening right facing the upper part of the injection nozzle; the upper grid plate adopts a corrugated net plate. The utility model discloses increased the gas-solid contact inefficiency, improved the conversion rate, reduced the dust or the liquid foam in the gas of reaction back export simultaneously, reduced material loss and the cost of treating pollution.

Description

A fluidized bed for production of tetrachloro terephthalonitrile

Technical Field

The utility model belongs to the technical field of pesticide chemical production, concretely relates to ebullated bed for production of tetrachloroterephthalonitrile.

Background

Tetrachloroterephthalonitrile is an important organic intermediate, white powder, and widely used in medicines, dyes and pesticides. The fluidized bed amination catalysis process is a mainstream method for preparing tetrachloroterephthalonitrile, and the fluidized bed is important equipment of the process. The wall of the boiling bed has the function of fluid pressure, can overflow and has viscosity, and because the particles of the working solid are smaller and are in a violent movement state under the action of the fluid, the contact area between the fluid and the granular solid material is increased, thereby promoting the mass and heat transfer and greatly improving the production strength.

In the production process of tetrachloroterephthalonitrile, the gas-solid contact efficiency is low, the conversion rate is influenced, and in addition, the gas at the outlet after the reaction has a large amount of dust or liquid foam, so that part of material loss is caused and the subsequent cleaning is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at overcoming the defects and difficulties in the prior art, the utility model aims at providing a fluidized bed for producing tetrachloroterephthalonitrile.

The utility model discloses a following technical scheme realizes:

a fluidized bed for producing tetrachloroterephthalonitrile comprises a reaction tank and an air inlet system, wherein a lower grid plate close to the tail end and an upper grid plate close to the top end are arranged in the reaction tank, and an area between the lower grid plate and the upper grid plate is a reaction area; the inner wall of the reaction zone is annularly provided with a heating chamber; the air inlet system comprises an air inlet pipe vertically penetrating from the center of the bottom of the reaction tank to the upper part in the reaction zone, an air pump communicated with the outside of the air inlet pipe and an injection nozzle arranged at the top end of the air inlet pipe, wherein a flow guide baffle is arranged above the injection nozzle, is in an inverted V shape, and has an opening right facing the upper part of the injection nozzle; the upper grid plate adopts a corrugated net plate.

Further, the spray nozzle adopts a venturi nozzle.

Furthermore, the included angle of the flow guide baffle is 40-90 degrees.

Furthermore, the outer wall of the heating chamber is provided with a plurality of groups of annular clapboards which are spaced up and down.

Further, the thickness of the annular partition plate is gradually reduced from the outside to the inside.

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

(1) the utility model discloses increased the gas-solid contact inefficiency, improved the conversion rate, reduced the dust or the liquid foam in the gas of reaction back export simultaneously, reduced material loss and the cost of treating pollution.

(2) The utility model discloses in gaseous entering reaction zone through air intake system injection, sharp ring body in the water conservancy diversion baffle of lambda shape, the outer width is favorable to guiding the air current diffusion, improves the clash attack of material granule in the motion, increases gas-solid contact efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Illustration of the drawings: 1-reaction tank, 2-heating chamber, 3-lower grid plate, 4-air pump, 5-air inlet pipe, 6-partition plate, 7-injection nozzle, 8-flow guide baffle plate and 9-upper grid plate.

In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, integrally connected; can be mechanical connection and electrical connection; may be directly connected, indirectly connected through intervening agents, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood to be specific to those skilled in the art.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figure 1, the fluidized bed for tetrachloroterephthalonitrile production comprises a reaction tank 1 and an air inlet system, wherein a lower grid plate 3 close to the tail end and an upper grid plate 9 close to the top end are arranged in the reaction tank 1, and the area between the lower grid plate 3 and the upper grid plate 9 is a reaction area.

The inner wall of the reaction zone is annularly provided with a heating chamber 2, and a heating pipe fitting is arranged in the heating chamber 2 and used for heating the interior of the reaction zone.

Air intake system includes from 1 bottom center of retort penetrate perpendicularly to the intake pipe 5 on reaction zone upper portion, with the air pump 4 of 5 outside intercommunications in intake pipe, set up the injection nozzle 7 on 5 tops of intake pipe, the top installation water conservancy diversion baffle 8 of injection nozzle 7, in gas sprays the entering reaction zone through air intake system in concrete implementation, disperse to the outside with higher speed under the effect of water conservancy diversion baffle 8, increase gas-solid contact velocity and area, avoid gaseous direct discharge simultaneously. The injection nozzle 7 is a venturi nozzle which can form a large flow circulation and also prevent clogging. The diversion baffle 8 is in an inverted V shape, the opening of the diversion baffle is just opposite to the upper part of the injection nozzle 7, and the included angle of the diversion baffle 8 is 40-90 degrees, so that the diversion baffle is favorable for guiding airflow diffusion.

The outer wall of the heating chamber 2 is provided with a plurality of groups of annular clapboards 6 which are spaced up and down, which is beneficial to improving the impact of material particles in motion, increasing the gas-solid contact efficiency, avoiding adhesion and playing a role in heat conduction.

The thickness of the annular partition plate 6 is gradually reduced from the outside to the inside to form a ring body with a wide outside and a sharp inside, so that the function of the annular partition plate is further optimized.

In order to avoid that the gas at the outlet after the reaction carries a large amount of dust or liquid foam, so that partial material loss is caused and the subsequent cleaning is increased, the upper grid plate 9 adopts a corrugated net plate, and when the gas overflows, the corrugated upper grid plate 9 plays a certain role in mist breaking.

Still include inlet pipe, discharging pipe, exhaust gas discharge pipe, active carbon etc. on retort 1, the utility model discloses still include pipeline, gas storage system etc. with air pump 4 intercommunication, its installation, constitution, connection adopt conventional structure, no longer give consideration to here.

The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A fluidized bed for tetrachloroterephthalonitrile production, which is characterized in that: the reaction device comprises a reaction tank (1) and an air inlet system, wherein a lower grid plate (3) close to the tail end and an upper grid plate (9) close to the top end are arranged in the reaction tank (1), and a reaction area is arranged in an area between the lower grid plate (3) and the upper grid plate (9); the inner wall of the reaction zone is annularly provided with a heating chamber (2); the air inlet system comprises an air inlet pipe (5) vertically penetrating from the center of the bottom of the reaction tank (1) to the upper part in the reaction area, an air pump (4) communicated with the outside of the air inlet pipe (5) and an injection nozzle (7) arranged at the top end of the air inlet pipe (5), wherein a flow guide baffle plate (8) is arranged above the injection nozzle (7), the flow guide baffle plate (8) is in an inverted V shape, and an opening of the flow guide baffle plate is over against the injection nozzle (7); the upper grid plate (9) adopts a corrugated net plate.

2. The ebullated bed for tetrachloroterephthalonitrile production of claim 1, wherein: the spray nozzle (7) adopts a Venturi nozzle.

3. The ebullated bed for tetrachloroterephthalonitrile production of claim 1, wherein: the included angle of the flow guide baffle (8) is 40-90 degrees.

4. The ebullated bed for tetrachloroterephthalonitrile production of claim 1, wherein: the outer wall of the heating chamber (2) is provided with a plurality of groups of annular clapboards (6) which are spaced up and down.

5. The ebullated bed for tetrachloroterephthalonitrile production of claim 4, wherein: the thickness of the annular clapboard (6) is gradually reduced from the outside to the inside.