CN210357094U - External continuous bed returning device of fluidized bed - Google Patents
External continuous bed returning device of fluidized bed Download PDFInfo
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- CN210357094U CN210357094U CN201920627184.2U CN201920627184U CN210357094U CN 210357094 U CN210357094 U CN 210357094U CN 201920627184 U CN201920627184 U CN 201920627184U CN 210357094 U CN210357094 U CN 210357094U
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Abstract
The utility model relates to a chemical industry equipment technical field, concretely relates to external continuous bed device that returns of fluidized bed. The device comprises a cyclone separator, a mixing pressurizing piece and a chloromethane air supply pipeline which are connected with a fluidized bed, wherein a first inlet end of the mixing pressurizing piece is communicated with an output end of the cyclone separator, a second inlet end of the mixing pressurizing piece is communicated with the chloromethane air supply pipeline, and a first outlet end of the mixing pressurizing piece is communicated with the fluidized bed; and the methyl chloride gas continuously entering the mixing pressurizing piece through the methyl chloride gas supply pipeline is mixed with the silicon powder continuously entering the mixing pressurizing piece from the cyclone separator, and the mixture is pressurized by the mixing pressurizing piece and then sprayed into the fluidized bed. The utility model discloses an external continuous bed device that returns of fluidized bed has the powder and returns the reaction effectual when the bed, and silica flour is difficult for blockking up the advantage of pipeline.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field, concretely relates to external continuous bed device that returns of fluidized bed.
Background
At present, the production of organic silicon monomer in industry is usually synthesized by Rochow direct method, the materials participating in the reaction mainly comprise chloromethane gas, silicon powder, copper powder and the like, and the used equipment is a fluidized bed reactor. The fluidized bed synthesized by the organic silicon monomer is generally connected with two cyclone separators which are commonly called a primary cyclone and a secondary cyclone respectively, and the primary cyclone and the secondary cyclone are used for collecting silicon powder in the fluidized bed respectively. Adding a catalyst into the fluidized bed when the reaction is started, intermittently replenishing the catalyst in the operating period, wherein the silicon powder collected in a rotary mode generally adopts a semi-continuous return bed, or fine powder is squeezed to be dry at the end of the reaction period, and the working condition of the reactor is poor in the semi-continuous return bed or the squeezing process because the quality of the collected silicon powder is poor compared with that of the silicon powder in the raw materials; and when the product is squeezed to be dry in the final stage of the reaction, the yield of the main product dimethyldichlorosilane is greatly reduced, more low-value harmful byproducts and dangerous solid wastes are generated, and the reaction effect is poor. The conventional silicon powder returning bed is carried out by gravity, and the silicon powder often blocks a pipeline, so that the workload of operators is large. When the silicon powder is returned to the fluidized bed in a semi-continuous way, the heat of the silicon powder collected in a rotary way can be dissipated when the silicon powder is stored, and after the silicon powder is returned to the fluidized bed, the fluidized bed is required to provide heat to heat the silicon powder to the temperature of the reaction zone, so that the energy consumption of the fluidized bed is correspondingly large.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming in the organosilicon monomer production among the prior art, and silica flour is poor when returning to the bed reaction effect, and silica flour can block up the defect of pipeline to it is good to provide a silica flour when returning to the bed reaction effect, and silica flour is difficult for blockking up the external continuous bed device that returns of fluidized bed of pipeline.
In order to solve the above problems, the external continuous bed returning device of the fluidized bed of the present invention comprises a cyclone separator, a mixed pressurizing piece and a chloromethane air supply pipeline connected with the fluidized bed, wherein a first inlet end of the mixed pressurizing piece is communicated with an output end of the cyclone separator, a second inlet end of the mixed pressurizing piece is communicated with the chloromethane air supply pipeline, and a first outlet end of the mixed pressurizing piece is communicated with the fluidized bed; and the methyl chloride gas continuously entering the mixing pressurizing piece through the methyl chloride gas supply pipeline is mixed with the silicon powder continuously entering the mixing pressurizing piece from the cyclone separator, and the mixture is pressurized by the mixing pressurizing piece and then sprayed into the fluidized bed.
The methyl chloride gas may create a vacuum at the first inlet end of the mixing plenum upon entering the mixing plenum.
The mixing and pressurizing part is a Venturi tube or a vacuum jet pump.
Also included is a surge tank disposed between the cyclone and the mixing plenum.
The mixing pressure-increasing piece is characterized by further comprising a reducer pipe arranged between the buffer tank outlet of the buffer tank and the first inlet end, and the buffer tank and the mixing pressure-increasing piece are communicated through the reducer pipe.
The buffer tank is arranged right below the cyclone separator.
And the first outlet end of the mixing pressurizing piece is connected with a nozzle arranged at the bottom of the fluidized bed, and the methyl chloride and silicon powder mixture sprayed out of the mixing pressurizing piece enters the fluidized bed from the nozzle.
The outlet of the nozzle is close to the inner wall of the fluidized bed, and is flush with the bottom of the fluidized bed or extends into the fluidized bed for a set distance.
Still include with methyl chloride air supply line intercommunication's nitrogen gas supply line.
The device also comprises valves arranged on the nitrogen gas supply pipeline, and/or the upper stream of the communication position of the nitrogen gas supply pipeline and the methyl chloride gas supply pipeline, and/or the lower stream of the communication position of the nitrogen gas supply pipeline and the methyl chloride gas supply pipeline, and/or the reducer pipe; a temperature monitoring assembly and a pressure monitoring assembly disposed on the piping outside the first inlet end, and/or outside the second inlet end, and/or outside the first outlet end of the hybrid plenum.
The utility model discloses technical scheme has following advantage:
1. the utility model discloses an external continuous bed returning device of fluidized bed, including cyclone and the mixed supercharging spare of being connected with the fluidized bed, the first entry end of mixed supercharging spare with cyclone's output intercommunication, the second entry end of mixed supercharging spare and chloromethane air supply line intercommunication, the first exit end of mixed supercharging spare with the fluidized bed intercommunication; and the methyl chloride gas continuously entering the mixing pressurizing piece through the methyl chloride gas supply pipeline is mixed with the silicon powder continuously entering the mixing pressurizing piece from the cyclone separator, and the mixture is pressurized by the mixing pressurizing piece and then sprayed into the fluidized bed. The external continuous bed returning device of the fluidized bed adopts a continuous bed returning mode, when the fluidized bed is returned, the chloromethane gas provides power for the bed returning of the silicon powder, and the speed of the silicon powder is increased by the mixed pressurizing piece when the bed is returned, so that the silicon powder is fully mixed with the vulcanized body in the fluidized bed after entering the fluidized bed, the reaction efficiency of the silicon powder returning to the bed is high, and the reaction effect in the fluidized bed is better; the chloromethane is used for providing power for the silicon powder to return to the bed, so that the silicon powder can be prevented from blocking a pipeline, and the workload is reduced; the silicon powder returning bed is a continuous returning bed, steps such as storage and the like are not needed, the silicon powder flowing back into the fluidized bed has a certain temperature, and the energy consumed by heating the silicon powder returning bed to the temperature of the reaction zone by the fluidized bed can be reduced, so that the energy consumption of the fluidized bed can be saved. By adopting the continuous returning mode, the silicon powder returning to the bed stably enters the fluidized bed, and the problem of poor working condition in the fluidized bed caused by the fact that the silicon powder returning to the bed is suddenly added in the fluidized bed when the silicon powder is semi-continuously returned to the bed or in the process of squeezing is avoided, so that the production working condition in the fluidized bed is relatively stable. The utility model discloses in, the bed is returned in succession to silica flour, in time with the silica flour that runs off send back the fluidized bed, has reduced adding of silica flour, has reduced solid waste's production.
2. The utility model discloses an external continuous bed device that returns of fluidized bed, the gaseous entering of chloromethane can mix behind the supercharging piece first entry end department of supercharging piece produces the vacuum, helps inhaling first entry end and entering into mixing the supercharging piece with the silica flour in the pipeline that first entry end is connected, helps the entering of silica flour and prevents that silica flour from blockking up the pipeline, and enters into the silica flour that mixes in the supercharging piece and has certain speed, is favorable to the gaseous intensive mixing of silica flour chloromethane.
3. The utility model discloses an external continuous bed device that returns of fluidized bed, the setting of reducing pipe can change the velocity of motion in the reducing pipe of silica flour through the change of pipe diameter size, helps preventing that silica flour from blockking up the reducing pipe.
4. The utility model discloses an external continuous bed device that returns of fluidized bed, the setting of nitrogen gas supply line, the abnormal conditions in the bed device is returned in succession in processing that can be timely, if methyl chloride and silica flour react in the pipeline, can break up the reaction of methyl chloride and silica flour through letting in nitrogen gas, play the protection and return the effect of bed device.
5. The utility model has the advantages that the external continuous bed returning device of the fluidized bed can control the flow of nitrogen, chloromethane gas and silicon powder according to the use requirement by arranging the valve; the silicon powder and the chloromethane gas can release heat during reaction and can cause pressure change, and the temperature monitoring component and the pressure monitoring component are arranged to timely discover the conditions of the silicon powder and the chloromethane gas in the pipeline and the mixed pressurizing piece, and timely discover and process the conditions of reaction of the chloromethane and the silicon powder in the pipeline and the mixed pressurizing piece, and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the external continuous bed returning device of the fluidized bed of the present invention;
description of reference numerals:
1-a fluidized bed; 2-a cyclone separator; 3-a hybrid plenum; 31-a first inlet end; 32-a second inlet end; 33-a first outlet end; a 4-chloromethane gas supply line; 5-a buffer tank; 6-reducing pipe; 7-a nozzle; 8-nitrogen gas supply line; 9-valve.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that 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.
The external continuous fluidized bed returning device of the present embodiment, as shown in fig. 1, includes a cyclone 2, a mixing and pressurizing part 3, a buffer tank 5, a communication pipeline and a valve 9. The cyclone separator 2 is communicated with the upper end of the fluidized bed 1, the buffer tank 5 is arranged right below the cyclone separator 2, the output end of the cyclone separator 2 is communicated with the buffer tank 5, the outlet of the buffer tank 5 is communicated with the first inlet end 31 of the mixing pressurizing piece 3, the second inlet end 32 of the mixing pressurizing piece 3 is communicated with the methyl chloride supply pipeline 4, and the first outlet end 33 of the mixing pressurizing piece 3 is communicated with the fluidized bed 1; the methyl chloride gas continuously entering the mixing and pressurizing part 3 through the methyl chloride gas supply pipeline 4 is mixed with the silicon powder continuously entering the mixing and pressurizing part 3 from the buffer tank 5, and the mixture is pressurized by the mixing and pressurizing part 3 and then sprayed into the fluidized bed 1.
In order to prevent the pipeline between the buffer tank 5 and the mixing and pressurizing member 3 from being blocked, a reducer pipe 6 is arranged between the outlet of the buffer tank 5 and the first inlet end 31, and the buffer tank 5 and the mixing and pressurizing member 3 are communicated through the reducer pipe 6. After the methyl chloride gas enters the mixing and pressurizing part 3 in this embodiment, vacuum can be generated at the first inlet end 31 of the mixing and pressurizing part 3, the silicon powder in the reducer pipe 6 at the first inlet end 31 is sucked into the mixing and pressurizing part 3, the blockage of the reducer pipe 6 by the silicon powder can also be prevented, and meanwhile, the silicon powder entering the mixing and pressurizing part 3 has a certain speed, so that the silicon powder is more fully mixed with methyl chloride, and the methyl chloride more easily brings the silicon powder into the fluidized bed 1. In this embodiment, the mixing and pressurizing element 3 is a venturi tube, but may also be a vacuum jet pump, or other elements may be selected according to the use requirement.
The first outlet end 33 of the mixing and pressurizing part 3 is connected with a nozzle 7 arranged at the bottom of the fluidized bed 1, and the methyl chloride and silicon powder mixture sprayed out of the mixing and pressurizing part 3 enters the fluidized bed 1 through the nozzle 7. The export of nozzle 7 is close to 1 inner wall of fluidized bed sets up, and with the bottom parallel and level of fluidized bed 1, or stretch into set distance in the fluidized bed 1, can according to the user demand setting.
The chloromethane and the silicon powder can react when the reaction conditions are met, and a nitrogen gas supply pipeline 8 is communicated with the chloromethane gas supply pipeline 4 in order to protect the safety of an external continuous return bed device of the fluidized bed and prevent the chloromethane and the silicon powder from reacting.
As the silicon powder and the chloromethane gas can release heat during reaction and can cause pressure change, a valve 9 is arranged on the reducing pipe 6 on the nitrogen gas supply pipeline 8, the upper stream of the communication position of the nitrogen gas supply pipeline 8 and the chloromethane gas supply pipeline 4, and the lower stream of the communication position of the nitrogen gas supply pipeline 8 and the chloromethane gas supply pipeline 4. The type of the valve 9 can be selected according to the use requirement, and in this embodiment, it is a solenoid valve.
The silicon powder and the chloromethane gas can release heat during reaction and can cause the gas pressure to change, and the temperature monitoring component and the pressure monitoring component which are arranged on the pipeline outside the first inlet end 31, the second inlet end 32 and the first outlet end 33 of the mixed pressurizing piece 3 can timely find the conditions of the silicon powder and the chloromethane gas in the pipeline and the mixed pressurizing piece 3, timely find and process the conditions of reaction and the like of the chloromethane and the silicon powder in the pipeline and the mixed pressurizing piece 3.
The external continuous bed returning device of the fluidized bed adopts a continuous bed returning mode, when the fluidized bed is returned, the chloromethane gas provides power for the bed returning of the silicon powder, and the speed of the silicon powder is increased by the mixing pressurizing piece 3 when the fluidized bed is returned, so that the silicon powder is fully mixed with the sulfide in the fluidized bed 1 after entering the fluidized bed 1, the reaction efficiency of the silicon powder returning to the bed is high, and the reaction effect in the fluidized bed 1 is better; the chloromethane is used for providing power for the silicon powder to return to the bed, so that the silicon powder can be prevented from blocking a pipeline, and the workload is reduced; the silicon powder returning bed is a continuous returning bed, steps such as storage and the like are not needed, the silicon powder flowing back into the fluidized bed 1 has a certain temperature, and the energy consumed by heating the silicon powder returning bed to the temperature of the reaction zone by the fluidized bed 1 can be reduced, so that the energy consumption of the fluidized bed 1 can be saved. By adopting the continuous returning mode, the silicon powder returning to the bed stably enters the fluidized bed 1, and the problem of poor working condition in the fluidized bed 1 caused by the fact that the silicon powder returning to the bed is suddenly added in the fluidized bed 1 when the silicon powder is not continuously returned to the bed or in the process of drying is solved, so that the production working condition in the fluidized bed 1 is relatively stable.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. An external continuous bed returning device of a fluidized bed comprises a cyclone separator (2) connected with the fluidized bed (1) and is characterized by also comprising,
a mixing plenum (3), the first inlet end (31) of the mixing plenum (3) communicating with the output of the cyclone (2), the second inlet end (32) of the mixing plenum (3) communicating with a methyl chloride gas supply line (4), the first outlet end (33) of the mixing plenum (3) communicating with the fluidized bed (1);
and the methyl chloride gas continuously entering the mixing pressurizing piece (3) through the methyl chloride gas supply pipeline (4) is mixed with the silicon powder continuously entering the mixing pressurizing piece (3) from the cyclone separator (2), and the mixture is pressurized by the mixing pressurizing piece (3) and then sprayed into the fluidized bed (1).
2. The external continuous fluidized bed returning device according to claim 1, wherein the methyl chloride gas is introduced into the mixing and pressurizing element (3) to generate a vacuum at the first inlet end (31) of the mixing and pressurizing element (3).
3. The external continuous fluidized bed returning device according to claim 2, wherein the mixing and pressurizing member (3) is a venturi tube or a vacuum jet pump.
4. The external continuous fluidized bed returning device according to claim 1, further comprising a buffer tank (5) disposed between the cyclone separator (2) and the mixing plenum (3).
5. The external continuous fluidized bed returning device according to claim 4, further comprising a reducer pipe (6) disposed between the outlet of the buffer tank (5) and the first inlet end (31), wherein the buffer tank (5) and the mixing and pressurizing member (3) are communicated through the reducer pipe (6).
6. The external continuous fluidized bed returning device according to claim 4, wherein the buffer tank (5) is arranged right below the cyclone separator (2).
7. The external continuous fluidized bed returning device according to any one of claims 1 to 6, wherein the first outlet end (33) of the mixing and pressurizing member (3) is connected with a nozzle (7) arranged at the bottom of the fluidized bed (1), and the mixture of methyl chloride and silicon powder sprayed from the mixing and pressurizing member (3) enters the fluidized bed (1) through the nozzle (7).
8. The external continuous return device for fluidized bed according to claim 7, wherein the outlet of the nozzle (7) is disposed near the inner wall of the fluidized bed (1) and is flush with the bottom of the fluidized bed (1) or extends into the fluidized bed (1) for a set distance.
9. The external continuous fluidized bed returning apparatus according to any one of claims 1 to 6, further comprising a nitrogen gas supply line (8) in communication with the methyl chloride gas supply line (4).
10. The external continuous return device for fluidized bed according to claim 9, further comprising,
a valve (9) is arranged on the nitrogen gas supply pipeline (8), and/or the upper stream of the communication position of the nitrogen gas supply pipeline (8) and the methyl chloride gas supply pipeline (4), and/or the lower stream of the communication position of the nitrogen gas supply pipeline (8) and the methyl chloride gas supply pipeline (4), and/or a reducer pipe (6);
temperature and pressure monitoring assemblies are arranged on the pipeline outside the first inlet end (31), and/or outside the second inlet end (32), and/or outside the first outlet end (33) of the mixing plenum (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920627184.2U CN210357094U (en) | 2019-04-30 | 2019-04-30 | External continuous bed returning device of fluidized bed |
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| CN201920627184.2U CN210357094U (en) | 2019-04-30 | 2019-04-30 | External continuous bed returning device of fluidized bed |
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| CN210357094U true CN210357094U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115178189A (en) * | 2022-07-12 | 2022-10-14 | 合盛硅业股份有限公司 | Organic silicon monomer production system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115178189A (en) * | 2022-07-12 | 2022-10-14 | 合盛硅业股份有限公司 | Organic silicon monomer production system and method |
| CN115178189B (en) * | 2022-07-12 | 2023-08-25 | 合盛硅业(嘉兴)有限公司 | Organosilicon monomer production system and method |
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Address after: 100176 1510, Floor 15, Building 4, Yard 18, Kechuang 13th Street, Daxing District, Beijing Economic-Technological Development Area (Yizhuang Cluster, High end Industrial Zone, Beijing Pilot Free Trade Zone) Patentee after: Beijing Guohua New Materials Technology Research Institute Co.,Ltd. Address before: Room 1422, Building 16, Anhuili Fourth District, Chaoyang District, Beijing, 100723 Patentee before: Beijing Guohua new material technology center (L.P.) |