CN213193638U - Fluidized bed for producing aluminum fluoride - Google Patents

Abstract

The utility model provides a fluidized bed for producing aluminum fluoride, which comprises a box body, wherein the middle part of one end of the box body is upwards provided with a feed inlet, and the middle part of the other end of the box body is downwards provided with a discharge outlet; a conveying device is arranged in the middle of the box body and comprises a breathable conveying belt, and the conveying belt is used for conveying materials from the feeding hole to the discharging hole; the lower part in the box body is divided into two lower cavities by a lower partition plate, the two lower cavities are respectively provided with a first air inlet and a second air inlet, the first air inlet is a hot steam inlet, and the second air inlet is a cooling air inlet; the upper part in the box body is divided into two upper cavities by an upper partition plate, and the tops of the two upper cavities are respectively provided with a first air outlet and a second air outlet; the two upper cavities are internally provided with filter screens. The middle part of the fluidized bed is provided with the conveying device, so that the speed can be controlled, materials can be continuously and dispersedly conveyed, gas enters from the lower part, penetrates through the conveying belt to fully contact and react with the materials, the materials can be cooled, the production efficiency is high, and the control is easy.

Description

Fluidized bed for producing aluminum fluoride

Technical Field

The utility model relates to an aluminium fluoride production facility technical field. In particular to a fluidized bed for producing aluminum fluoride.

Background

A fluidized bed is a reactor in which solid particles are in a suspended state by passing a gas or liquid through a granular solid layer and a gas-solid reaction process or a liquid-solid reaction process is performed. In the process of producing aluminum fluoride by a refined acid dry method, gas generated by high-temperature reaction of sulfuric acid and fluorite enters an evaporator after rough washing, freezing, degassing and rectification, hydrogen fluoride gas generated by evaporation enters a fluidized bed, and reacts with wet aluminum hydroxide in the fluidized bed to generate aluminum fluoride at high temperature, namely the fluidized bed is used for gas-solid reaction in the process.

The fluidized bed in the existing aluminum fluoride production mostly adopts the production of a vertical double-layer fluidized bed, wet aluminum hydroxide is added from the upper part, moves downwards due to gravity and vibration, and is in contact reaction with hydrogen fluoride steam entering from the bottom in the moving process to generate aluminum fluoride which is discharged from the lower part, and unreacted hydrogen fluoride is discharged from the top. The adoption of the vertical double-layer fluidized bed has the problems that the inlet and outlet speed of solid materials is difficult to control and the production continuity is poor; in addition, the problems of short contact time, uneven contact, insufficient reaction and the like of wet aluminum hydroxide and hydrogen fluoride steam are easy to occur.

SUMMERY OF THE UTILITY MODEL

In order to solve the prior art problems, the utility model aims at providing a fluidized bed for producing aluminum fluoride, this fluidized bed middle part sets up conveyer, controllable fast, continuous, dispersion transportation material, and gaseous gets into by the lower part and passes conveyer belt and the abundant contact reaction of material, and can cool off the material, and this fluidized bed production efficiency is high, easily control.

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

a fluidized bed for producing aluminum fluoride comprises a box body, wherein a feed inlet is formed in the middle of one end of the box body upwards, and a discharge outlet is formed in the middle of the other end of the box body downwards; a conveying device is arranged in the middle of the box body and comprises a breathable conveying belt, and the conveying belt is used for conveying materials from the feeding hole to the discharging hole; the lower part in the box body is divided into two lower cavities by a lower partition plate, the two lower cavities are respectively provided with a first air inlet and a second air inlet, the first air inlet is a hot steam inlet, and the second air inlet is a cooling air inlet; the upper part in the box body is divided into two upper cavities by an upper partition plate, and the tops of the two upper cavities are respectively provided with a first air outlet and a second air outlet; and filter screens are arranged in the upper cavities.

Further, the conveying device comprises a driving motor, the driving motor is located on the outer side of the end portion of the box body, and an output shaft of the driving motor penetrates through the box body to be connected with the conveying belt inside the box body. For driving the continuous and stable running of the conveyor belt.

Further, go up the baffle with lower baffle corresponds the setting, its tip all is close with the conveyer belt.

Further, first air inlet and first gas outlet all are equipped with 3. Ensuring that the hot steam enters into contact reaction with the materials evenly and ensuring the materials to react fully.

Furthermore, baffle plates are further arranged in the upper chamber provided with the first air outlet, and the baffle plates are arranged on the front wall and the rear wall of the box body in a staggered mode and are positioned below the filter screen. The baffle plate changes and prolongs the path of the hot steam, reduces the discharge speed of the hot steam and prolongs the contact time of the hot steam and the material; the operation speed of the hot steam is reduced to increase the interception efficiency of the filter screen.

Furthermore, an observation hole is formed in the side wall of the upper portion of the box body.

Furthermore, two temperature detection probes are installed in the upper cavities. The temperature detection device is used for detecting the temperature of the corresponding part in the box body in real time.

Furthermore, an inclined material guide plate is arranged in the feeding hole. The material guiding device is used for guiding materials onto the conveying belt and preventing the materials from scattering.

Compared with the prior art, the beneficial effects of the utility model are that:

the fluidized bed of the utility model is provided with a conveying device at the middle part in the box body, which conveys materials to a discharge port from a feed inlet, the conveying belt is breathable, and steam enters from the lower part of the box body, passes through the conveying belt to contact with the materials for reaction and then is discharged from the upper part of the box body; an upper partition plate and a lower partition plate are arranged in the box body, the upper part and the lower part of the box body are respectively divided into two upper cavities and two lower cavities, a first air inlet, a second air inlet, a first air outlet and a second air outlet are arranged, hot steam for reaction enters from the front-section cavity for reaction, and cooling air enters from the rear-section cavity for cooling materials; the filter screen is installed in the upper cavity body, so that materials are prevented from being discharged along with air flow, and material loss is avoided. The fluidized bed can continuously, dispersedly and controllably react materials with hot steam in a contact way, ensures full reaction, and has high production efficiency and convenient control.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure of the present invention.

Reference numerals:

1: a box body; 11: a feed inlet; 111: a material guide plate; 12: a discharge port; 2: a conveyor belt; 21: a filter screen; 13: a lower cavity; 130: a lower partition plate; 131: a first air inlet; 132: a second air inlet; 14: an upper cavity body: 140: an upper partition plate; 141: a first air outlet; 142: a second air outlet; 143: a filter screen; 144: a baffle plate; 145: an observation hole; 146: a temperature detection probe.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the embodiment of the present invention provides a fluidized bed for producing aluminum fluoride, which is of a horizontal structure, and includes a horizontal box 1, a conveyer installed in the box 1, an upper partition 130 and a lower partition 140 separating the box 1 into different chambers, a filter screen 143, and the like.

Wherein, the two ends of the box body 1 are communicated, the middle part of one end of the box body 1 is upwards provided with a feed inlet 11, and the middle part of the other end is downwards provided with a discharge outlet 12. The conveying device is arranged in the middle of the box body 1 and comprises a conveying belt 2, a driving motor 21 and a roller body, the roller body is arranged at the lower end of the feeding hole 11 and the upper end of the discharging hole 12 in the box body 1, and the conveying belt 2 is wound on the roller body; the driving motor 21 is arranged at the outer side of the end part of the box body 1, an output shaft of the driving motor 21 penetrates through the box body 1 to be connected with the roller body, and the roller body is driven to rotate, so that the conveying belt 2 is driven to run; i.e. the drive motor 21 is indirectly connected to the conveyor belt 2. The conveyor belt 2 is an air-permeable conveyor belt and can be penetrated by hot steam; the conveyor belt 2 is used for conveying the material (wet aluminum hydroxide) entering from the feeding hole 11 to the discharging hole 12 to be discharged, and allowing the material to contact with hot steam for reaction. Wherein, an inclined guide plate 111 is arranged in the feed inlet 11, the lower end of the guide plate 111 is close to the conveyor belt 2, and the material entering from the feed inlet 11 is guided to the conveyor belt 2.

The box body 1 is divided into an upper part and a lower part through the conveyor belt 2, a lower clapboard 130 is arranged in the lower part of the box body 1, and the lower part of the box body 1 is divided into a left lower cavity 13 and a right lower cavity 13 by the lower clapboard 130. The two lower cavities 13 are respectively provided with a first air inlet 131 and a second air inlet 132, and the first air inlet 131 is connected with the right lower cavity 13 and is close to the end of the feed port 11; the second air inlet 132 is connected with the left lower cavity 13 and is close to the end of the discharge hole 11. The first gas inlet 131 is a hot steam inlet, and hydrogen fluoride gas for supplying heat is introduced; the second air inlet 132 is a cooling air inlet for introducing low-temperature gas to cool the reacted materials.

An upper partition plate 140 is arranged in the upper part of the box body 1, the upper partition plate 140 also divides the upper part of the box body 1 into a left upper cavity 14 and a right upper cavity 14, the tops of the two upper cavities 14 are respectively provided with a first air outlet 141 and a second air outlet 142, the first air outlet 141 is connected with the right upper cavity 14, is close to the feed port 11 end and corresponds to the first air inlet 131; the second air outlet 142 is connected to the upper left chamber 14 near the discharge port 12 and corresponds to the second air inlet 132. The two upper cavities 14 are internally provided with filter screens 143 for filtering material particles carried in the exhaust gas and preventing material loss.

Wherein, the upper baffle plate 140 corresponds to the lower baffle plate 130, the lower end part of the upper baffle plate 140 is close to the upper surface of the conveyor belt 2, and the material particles can pass through the lower baffle plate at a smaller interval; the upper end of the lower partition 130 is close to the lower surface of the conveyor belt 2. So that the gas entering from the first gas inlet 131 is discharged from the first gas outlet 141 at the upper portion, and the gas entering from the second gas inlet 132 is discharged from the second gas outlet 142.

Preferably, first air inlet 131 and first gas outlet 141 all are equipped with 3, and 3 first air inlets 131 and first gas outlet 141 are along material direction of transfer interval distribution for the even entering of hot steam is fully contacted with the material above conveyer belt 2 and is reacted, and the discharge box 1. Prevent the incomplete reaction of materials caused by uneven distribution of hot steam.

Baffle plates 144 are arranged in the upper chamber 14 provided with the first air outlet 131, the baffle plates 144 comprise at least two blocks and are arranged on the front wall and the rear wall of the upper part of the box body 1 in a staggered mode, the width of the baffle plates 144 is greater than 1/2 of the width of the box body 1 and smaller than 2/3 of the width of the box body 1, and the baffle plates 144 are located below the filter screen 143. The circulation path of the hot steam can be prolonged, the flowing speed of the hot steam is slowed down, the contact time of the hot steam and the solid material is prolonged, and meanwhile, the interception efficiency of the filter screen 143 on mixed material particles in the air flow is improved.

Furthermore, the sidewall of the upper portion of the box body 1 is provided with two perspective sealed observation holes 145, and the two observation holes 145 are respectively used for observing the internal conditions of the two upper cavities 14. The two upper cavities 14 are also respectively provided with a temperature detection probe 146, which can monitor the temperature in the upper cavity 4 in real time.

In the foregoing, only certain exemplary embodiments have been described briefly. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings, or are orientations and positional relationships conventionally understood by those skilled in the art, which are merely for convenience of description and simplicity of description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The meaning of "plurality" is two or more unless specifically limited otherwise.

The terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected or detachably connected or integrated; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Claims (8)

1. The fluidized bed for producing the aluminum fluoride is characterized by comprising a box body (1), wherein a feed inlet (11) is formed in the middle of one end of the box body (1) in an upward mode, and a discharge outlet (12) is formed in the middle of the other end of the box body (1) in a downward mode; a conveying device is arranged in the middle of the inside of the box body (1), the conveying device comprises a ventilating conveying belt (2), and the conveying belt (2) is used for conveying materials from the feeding hole (11) to the discharging hole (12); the lower portion in the box body (1) is divided into two lower cavities (13) through a lower partition plate (130), the two lower cavities (13) are respectively provided with a first air inlet (131) and a second air inlet (132), the first air inlet (131) is a hot steam inlet, and the second air inlet (132) is a cooling air inlet; the upper part in the box body (1) is divided into two upper cavities by an upper partition plate (140), and the tops of the two upper cavities (14) are respectively provided with a first air outlet (141) and a second air outlet (142); and filter screens (143) are arranged in the two upper cavities (14).

2. Fluidized bed for the production of aluminium fluoride according to claim 1, characterized in that the conveyor means comprise a drive motor (21), the drive motor (21) being located outside the end of the box (1), the output shaft of which is connected through the box (1) to an internal conveyor belt (2).

3. The fluidized bed for the production of aluminum fluoride according to claim 1 or 2, characterized in that the upper partition (140) and the lower partition (130) are arranged in correspondence, both ends of which are close to the conveyor belt (2).

4. The fluidized bed for the production of aluminum fluoride according to claim 3, wherein there are 3 of the first gas inlet (131) and the first gas outlet (141).

5. The fluidized bed for producing aluminum fluoride according to claim 4, wherein baffles (144) are further installed in the upper chamber (14) provided with the first gas outlet (141), and the baffles (144) are installed on the front and rear walls of the box body (1) in a staggered manner and are located below the filter screen (143).

6. The fluidized bed for the production of aluminum fluoride according to claim 1, characterized in that the upper side wall of the box (1) is provided with a viewing hole (145).

7. The fluidized bed for the production of aluminum fluoride according to claim 1 or 6, characterized in that a temperature detection probe (146) is installed in both of the upper cavities (14).

8. The fluidized bed for producing aluminum fluoride according to claim 1, wherein an inclined guide plate (111) is provided in the feed port (11).

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