CN220376371U - Online silica powder discharging system of cold hydrogenation fluidized bed - Google Patents
Online silica powder discharging system of cold hydrogenation fluidized bed Download PDFInfo
- Publication number
- CN220376371U CN220376371U CN202322292325.9U CN202322292325U CN220376371U CN 220376371 U CN220376371 U CN 220376371U CN 202322292325 U CN202322292325 U CN 202322292325U CN 220376371 U CN220376371 U CN 220376371U
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- waste
- fluidized bed
- powder
- outlet
- cold hydrogenation
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- 239000000843 powder Substances 0.000 title claims abstract description 62
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 55
- 238000007599 discharging Methods 0.000 title claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title description 4
- 239000000377 silicon dioxide Substances 0.000 title description 2
- 239000002699 waste material Substances 0.000 claims abstract description 99
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 55
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 12
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- 229910000077 silane Inorganic materials 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 claims description 4
- 239000007790 solid phase Substances 0.000 claims description 4
- 229910021487 silica fume Inorganic materials 0.000 claims 2
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 abstract description 9
- 239000005052 trichlorosilane Substances 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model provides an online silicon powder discharging system of a cold hydrogenation fluidized bed, which relates to the technical field of trichlorosilane synthesis and comprises the following components: silicon powder feeding tank; the cold hydrogenation fluidized bed is provided with a silicon powder feed port, a material outlet and a waste powder outlet; the silicon powder feeding port is connected with an outlet of the silicon powder feeding tank; the waste powder outlet is provided with a cut-off valve; the inlet of the heat exchanger is connected with the material outlet, and the outlet of the heat exchanger is connected with the inlet of the washing tower; a waste contact tank having a waste powder inlet and an outer discharge port; the waste powder inlet is connected with the waste powder outlet; the outer exhaust port is used for discharging waste powder in the waste contact tank. Through the setting of useless contact jar, can realize on-line and in time arrange the powder to cold hydrogenation fluidized bed under the condition of not stopping the system to avoid cold hydrogenation fluidized bed in-built too much useless powder, thereby the cycle of clearance cold hydrogenation fluidized bed is prolonged. By timely discharging the powder, excessive accumulated waste powder in the cold hydrogenation fluidized bed can be avoided, and the amount of fine waste powder entering the heat exchanger and the washing tower is reduced.
Description
Technical Field
The utility model relates to the technical field of trichlorosilane synthesis, in particular to an online silicon powder discharging system of a cold hydrogenation fluidized bed.
Background
Referring to fig. 1, when the cold hydrogenation fluidized bed 82 is operated for a long period of time, a large amount of waste powder which does not participate in the reaction is accumulated therein.
Excessive waste powder is liable to cause the following problems: the fluidized bed is caused to generate a dead bed phenomenon; the silicon powder is easy to block when pushing (the silicon powder feed inlet 821 of the cold hydrogenation fluidized bed 82 is easy to block); the optimal reaction zone (dense phase zone 86 near the distributor 87; distributor 87 is located at the lower part of the cold hydrogenation fluidized bed 82) reduces the reaction due to the large amount of waste powder, and reduces the conversion rate of trichlorosilane in the fluidized bed.
To solve the above problems, the present method of treating the waste powder in the cold hydrogenation fluidized bed 82 is; on the one hand, after the system is shut down, a large amount of waste powder in the cold hydrogenation fluidized bed 82 is discharged; on the other hand, the mixed gas of trichlorosilane and silane generated in the cold hydrogenation fluidized bed 82 is passed through a heat exchanger 83, a cyclone 85 and a scrubber 84 in this order together to remove metal impurities and fine silicon powder contained in the mixed gas of trichlorosilane and silane.
However, the current way of treating waste powder in the cold hydrogenation fluidized bed has the following technical problems to be solved:
1. a large amount of waste powder in the cold hydrogenation fluidized bed can be discharged only after the system is stopped.
2. When a large amount of fine waste powder passes through the heat exchanger, the fine waste powder can be hung on the side of the pipe wall of the heat exchanger, so that the heat exchange effect is affected, the pressure difference of the system is further increased, the circulation quantity of the system is reduced, the hydrogen-silicon ratio in the cold hydrogenation fluidized bed is reduced, and the conversion rate of trichlorosilane is affected.
3. A large amount of fine waste powder still enters the washing tower, so that the slag discharge pipeline related to the washing tower is easy to be blocked, and the abrasion part is easy to be ground and leaked.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
Aiming at the situation, the utility model provides an online silicon powder discharging system of a cold hydrogenation fluidized bed, which aims to solve the technical problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides an online silicon powder discharging system of a cold hydrogenation fluidized bed, which comprises the following components:
silicon powder feeding tank;
the cold hydrogenation fluidized bed is provided with a silicon powder feed port, a material outlet and a waste powder outlet; the silicon powder feeding port is connected with an outlet of the silicon powder feeding tank; the waste powder outlet is provided with a cut-off valve;
the inlet of the heat exchanger is connected with the material outlet, and the outlet of the heat exchanger is connected with the inlet of the washing tower; a kind of electronic device with high-pressure air-conditioning system
A waste contact tank having a waste powder inlet and an outer discharge port; the waste powder inlet is connected with the waste powder outlet; the outer exhaust port is used for discharging waste powder in the waste contact tank.
In some embodiments of the utility model, the waste contact tank has a combination of:
the replacement port is used for filling nitrogen into the waste contact tank; a kind of electronic device with high-pressure air-conditioning system
And the exhaust port is used for exhausting the mixed gas of hydrogen and silane in the waste contact tank.
In some embodiments of the utility model, the waste contact tank further has a pressurizing port for filling hydrogen gas at a predetermined pressure into the waste contact tank.
In some embodiments of the utility model, a filter is connected to the vent, and a solid phase outlet of the filter is connected to the waste contact tank.
In some embodiments of the utility model, a cooling jacket is disposed outside the waste contact tank.
In some embodiments of the utility model, the spent touch canister is 800H material.
In some embodiments of the utility model, the outlet of the heat exchanger is connected to the inlet of the scrubber via a cyclone.
In some embodiments of the utility model, a material pouring pipe is connected between the silicon powder feeding port and the waste powder outlet, and a material pouring valve is arranged on the material pouring pipe.
In some embodiments of the utility model, the pour tube is 800H.
In some embodiments of the utility model, the junction of the pouring tube and the material outlet is located between the shut-off valve and the waste inlet.
The embodiment of the utility model has at least the following advantages or beneficial effects:
1. through the setting of useless contact jar, can realize on-line and in time arrange the powder to cold hydrogenation fluidized bed under the condition to the system stop to avoid cold hydrogenation fluidized bed to accumulate too much waste powder in the short time, thereby will clear up the cycle of cold hydrogenation fluidized bed and extend to about 2 years from about 1 year, namely can prolong the cycle of clear up cold hydrogenation fluidized bed.
2. Through discharging the powder in time, excessive waste powder accumulated in the cold hydrogenation fluidized bed can be avoided, so that the amount of fine waste powder entering the heat exchanger and the washing tower is reduced, and the technical problem in the background technology is solved or relieved.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conventional cold hydrogenation fluidized bed;
FIG. 2 is a schematic structural diagram of an online silicon powder discharging system of a cold hydrogenation fluidized bed, which is provided by the embodiment of the utility model.
Icon:
the icon in fig. 1:
81-silicon powder feeding tank, 82-cold hydrogenation fluidized bed, 821-silicon powder feeding port, 83-heat exchanger, 84-washing tower, 85-cyclone separator, 86-concentrated phase area and 87-distributor.
The icon in fig. 2:
1-a feeding tank for silicon powder,
2-cold hydrogenation fluidized bed, 21-silicon powder feed inlet, 22-material outlet, 23-waste powder outlet, 231-cut-off valve,
3-waste contact tank, 31-waste powder inlet, 32-pressurizing port, 33-replacing port, 34-exhaust port, 35-external exhaust port, 36-cooling jacket, 37-filter, 371-solid phase outlet,
4-heat exchanger, 5-washing tower, 6-material pouring pipe, 61-material pouring valve and 7-cyclone separator.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Examples
Referring to fig. 1-2, the present embodiment provides an online silicon powder discharging system of a cold hydrogenation fluidized bed 2, which mainly includes a silicon powder feeding tank 1, a cold hydrogenation fluidized bed 2, a waste contact tank 3, a heat exchanger 4, a washing tower 5 and a pouring pipe 6.
The outlet of the silicon powder feeding tank 1 is connected with a silicon powder feeding port 21 of the cold hydrogenation fluidized bed 2.
The cold hydrogenation fluidized bed 2 has a silicon powder feed port 21, a material outlet 22, and a waste powder outlet 23. The pressure in the cold hydrogenation fluidized bed 2 was 2.7MPa.
The material outlet 22 is used for discharging the generated mixed gas of trichlorosilane and silane generated in the cold hydrogenation fluidized bed 2, and the mixed gas of trichlorosilane and silane carries a small amount of fine silicon powder and metal impurities.
The waste outlet 23 is provided with a shut-off valve 231.
The waste contact tank 3 has a waste powder inlet 31, a pressurizing port 32, a replacing port 33, an exhaust port 34, and an outer exhaust port 35.
The waste powder inlet 31 of the waste contact tank 3 is connected with the waste powder outlet 23 of the cold hydrogenation fluidized bed 2.
The pressurizing port 32 is used to charge hydrogen gas (i.e., high-pressure hot hydrogen) at a predetermined pressure into the waste contact tank 3.
The replacement port 33 is used for filling nitrogen into the waste contact tank 3, and the hydrogen and silane mixture in the waste contact tank 3 is conveyed to a designated position through the exhaust port 34, namely, the hydrogen and silane mixture in the waste contact tank 3 is replaced by the nitrogen to be qualified, so that waste powder is conveniently discharged through the outer discharge port 35 and bagging treatment is performed.
The inlet of the heat exchanger 4 is connected with a material outlet 22, and the outlet is connected with the inlet of the washing tower 5 through a cyclone separator 7; the mixed gas of trichlorosilane and silane in the cold hydrogenation fluidized bed 2 passes through a cyclone separator 7 and a washing tower 5 to remove metal impurities and unreacted fine silicon powder.
One end of the material pouring pipe 6 is connected with the silicon powder feeding port 21, and the other end is connected with the waste powder outlet 23; the pouring pipe 6 is provided with a pouring valve 61. When the silicon powder feed inlet 21 is blocked, the pouring valve 61 can be opened to pour the silicon powder blocked in the silicon powder feed inlet 21 into the waste contact tank 3 through the pouring pipe 6 for treatment so as to dredge the silicon powder feed inlet 21, thereby keeping the smoothness of the silicon powder feed inlet 21.
In this embodiment, the junction of the pouring tube 6 and the material outlet 22 is located between the shut-off valve 231 and the waste powder inlet 31, so that after the pouring valve 61 is opened, the waste contact tank 3 can be directly poured through the pouring tube 6 for disposal without operating the shut-off valve 231.
The waste contact tank 3 is provided with a cooling jacket 36, circulating water flows through the cooling jacket 36, and the circulating water is utilized to cool the waste powder (550 ℃) in the waste contact tank 3 to 100 ℃.
In the embodiment, the waste contact tank 3 and the pouring pipe 6 are made of 800H materials, and have the characteristics of high temperature resistance (550 ℃), high pressure resistance (2.7 Mpa) and wear resistance.
The exhaust port 34 is connected with a filter 37, and a solid phase outlet 371 of the filter 37 is connected with the waste contact tank 3; the waste powder carried in the mixture of hydrogen and silane is filtered by the filter 37 and the filtered waste powder is returned to the waste contact tank 3 so as to prevent the waste powder in the waste contact tank 3 from being discharged from the exhaust port 34.
The working principle of the online silicon powder discharging system of the cold hydrogenation fluidized bed 2 is as follows:
when discharging powder online, the waste contact tank 3 can be pressurized to 1.0MPa by the pressurizing port 32, then the cut-off valve 231 is opened, and the waste powder in the cold hydrogenation fluidized bed 2 is discharged into the waste contact tank 3 by the pressure difference between the cold hydrogenation fluidized bed 2 and the waste contact tank 3 (the high pressure of 2.7MPa in the cold hydrogenation fluidized bed 2 and the pressure of 1.0MPa in the waste contact tank 3 are repeatedly equalized for three times), so that the online powder discharge of the cold hydrogenation fluidized bed 2 is realized, namely, the waste powder in the cold hydrogenation fluidized bed 2 is timely discharged under the condition that the system is not stopped.
When the waste powder in the waste contact tank 3 needs to be discharged, the mixed gas of the hydrogen and the silane in the waste contact tank 3 can be replaced by the nitrogen to be qualified, and then the waste powder can be discharged through the outer discharge port 35 and subjected to bagging treatment.
When the silicon powder feed inlet 21 is blocked, the silicon powder in the silicon powder feed inlet 21 cannot enter the cold hydrogenation fluidized bed 2, and at the moment, the pouring valve 61 can be opened to pour the silicon powder blocked in the silicon powder feed inlet 21 into the waste contact tank 3 for treatment through the pouring pipe 6, so that the silicon powder feed inlet 21 is dredged, and the smoothness of the silicon powder feed inlet 21 is kept.
Finally, it should be noted that: the above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, and various modifications and changes may be made to the present utility model by those skilled in the art, and the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without collision. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. An on-line silicon powder discharging system of a cold hydrogenation fluidized bed, which is characterized by comprising the following components:
silicon powder feeding tank;
the cold hydrogenation fluidized bed is provided with a silicon powder feed port, a material outlet and a waste powder outlet; the silicon powder feeding port is connected with the outlet of the silicon powder feeding tank; the waste powder outlet is provided with a cut-off valve;
the inlet of the heat exchanger is connected with the material outlet, and the outlet of the heat exchanger is connected with the inlet of the washing tower; a kind of electronic device with high-pressure air-conditioning system
A waste contact tank having a waste powder inlet and an outer discharge port; the waste powder inlet is connected with the waste powder outlet; the outer exhaust port is used for discharging waste powder in the waste contact tank.
2. A cold hydrogenation fluidized bed on-line silicon powder discharging system according to claim 1, wherein said waste contact tank has a combination of:
the replacement port is used for filling nitrogen into the waste contact tank; a kind of electronic device with high-pressure air-conditioning system
And the exhaust port is used for exhausting the hydrogen and silane mixed gas in the waste contact tank.
3. A cold hydrogenation fluidized bed on-line silicon powder discharging system according to claim 2, wherein said waste contact tank further has a pressurizing port for filling hydrogen gas of a predetermined pressure into said waste contact tank.
4. A cold hydrogenation fluidized bed on-line silica fume removal system according to claim 2, wherein said vent is connected with a filter having a solid phase outlet connected to said waste contactor tank.
5. An on-line silicon powder discharge system for a cold hydrogenation fluidized bed as claimed in claim 1 wherein a cooling jacket is provided outside the waste contact tank.
6. An on-line silicon powder discharging system for a cold hydrogenation fluidized bed as claimed in claim 1 wherein said waste contact tank is 800H material.
7. An on-line silica fume removal system for a cold hydrogenated fluidized bed as set forth in claim 1, wherein an outlet of said heat exchanger is connected to an inlet of a scrubber through a cyclone.
8. An online silicon powder discharging system for a cold hydrogenation fluidized bed according to any one of claims 1 to 7, wherein a pouring pipe is connected between the silicon powder feed inlet and the waste powder outlet, and a pouring valve is arranged on the pouring pipe.
9. An on-line silicon powder discharging system for a cold hydrogenation fluidized bed as claimed in claim 8 wherein the material pouring pipe is 800H material.
10. A cold hydrogenation fluidized bed on-line silicon powder discharging system as claimed in claim 8, wherein the junction of said pouring tube and said material outlet is located between said shut-off valve and said waste powder inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292325.9U CN220376371U (en) | 2023-08-25 | 2023-08-25 | Online silica powder discharging system of cold hydrogenation fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292325.9U CN220376371U (en) | 2023-08-25 | 2023-08-25 | Online silica powder discharging system of cold hydrogenation fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220376371U true CN220376371U (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322292325.9U Active CN220376371U (en) | 2023-08-25 | 2023-08-25 | Online silica powder discharging system of cold hydrogenation fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220376371U (en) |
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2023
- 2023-08-25 CN CN202322292325.9U patent/CN220376371U/en active Active
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