CN115178189A

CN115178189A - Organic silicon monomer production system and method

Info

Publication number: CN115178189A
Application number: CN202210853846.4A
Authority: CN
Inventors: 张寅旭; 罗燚; 罗烨栋; 浩瀚; 罗立国; 徐颖; 胡斌; 汤奎山
Original assignee: Hoshine Silicon Industry Co ltd
Current assignee: Hesheng Silicon Jiaxing Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-10-14
Anticipated expiration: 2042-07-12
Also published as: CN115178189B

Abstract

The application provides an organic silicon monomer production system and an organic silicon monomer production method, relates to the technical field of organic silicon, and solves the technical problems that the bed temperature is easy to fluctuate greatly and the reaction is not facilitated to be carried out stably in the conventional intermittent silicon powder supplementing mode. The system comprises: the device comprises a fluidized bed, a first silicon powder tank, a first Venturi tube, a blowing assisting device, a first discharge tube, a first feed tube and a first air inlet tube; the fluidized bed is provided with a first inlet, the first silicon powder tank is provided with an outlet, the first Venturi tube is provided with a first inlet, a second inlet and an outlet, and the blowing assisting device is provided with an outlet; an outlet of the first silicon powder tank is communicated with a first inlet of the first Venturi tube through the first discharge pipe; an outlet of the blowing-assisting device is communicated with a second inlet of the first Venturi tube through the first air inlet tube; the outlet of the first venturi tube is communicated with the first inlet of the fluidized bed through the first feeding pipe.

Description

Organic silicon monomer production system and method

Technical Field

The application relates to the technical field of organic silicon, in particular to an organic silicon monomer production system and method.

Background

In the process of producing the organic silicon monomer, silicon powder needs to be supplemented to the fluidized bed to supplement the silicon powder consumed in the production process, and further the selectivity of the reaction is maintained.

At present, the mode of supplementing silicon powder to the fluidized bed is generally intermittent: silicon powder is intermittently led out from the silicon powder tank, and then the silicon powder is supplemented into the fluidized bed through auxiliary blowing.

However, the intermittent silicon powder feeding method is liable to cause great fluctuation of bed temperature, which is not favorable for smooth reaction.

Disclosure of Invention

The application provides an organic silicon monomer production system and method, which can be used for solving the problems that the bed temperature is easy to have large fluctuation and the reaction is not easy to be smoothly carried out due to the conventional intermittent silicon powder supplementing mode.

In a first aspect, embodiments herein provide a silicone monomer production system, the system comprising: the device comprises a fluidized bed, a first silicon powder tank, a first Venturi tube, a blowing assisting device, a first discharge tube, a first feed tube and a first air inlet tube;

the fluidized bed is provided with a first inlet, the first silicon powder tank is provided with an outlet, the first Venturi tube is provided with a first inlet, a second inlet and an outlet, and the blowing-assisting device is provided with an outlet;

an outlet of the first silicon powder tank is communicated with a first inlet of the first Venturi tube through the first discharge pipe; an outlet of the blowing-assisting device is communicated with a second inlet of the first Venturi tube through the first air inlet tube; the outlet of the first venturi tube is communicated with the first inlet of the fluidized bed through the first feeding pipe.

Optionally, in an embodiment, the auxiliary blowing device is used for providing methyl chloride gas to purge the first gas inlet pipe.

Optionally, in one embodiment, the system further comprises a methyl chloride storage device, a heating apparatus, and a compressor;

wherein the methyl chloride storage device is provided with an outlet, the heating equipment is provided with an inlet and an outlet, and the blowing-assisting device is also provided with an inlet;

the outlet of the chloromethane storage device is connected with the inlet of the heating device, the outlet of the heating device is communicated with the inlet of the blowing-assisting device, and the compressor is connected with the blowing-assisting device.

Optionally, in one embodiment, the system further comprises a dispenser and a second feed tube;

wherein the distributor has an inlet and a first outlet, the heating device has a first outlet and a second outlet, and the fluidized bed also has a second inlet;

the first outlet of the heating device is communicated with the inlet of the distributor, the first outlet of the distributor is communicated with the inlet of the blowing assisting device, and the second outlet of the heating device is communicated with the second inlet of the fluidized bed through the second feeding pipe.

Optionally, in one embodiment, the system further comprises a pressurizing device;

the pressurizing device is connected with the first silicon powder tank.

Optionally, in an embodiment, the system further comprises a second tapping pipe,

the outlet of the first silicon powder tank is communicated with the first position of the first feeding pipe through the second discharging pipe, and the first position is between the first Venturi pipe and the fluidized bed.

Optionally, in one embodiment, the system further comprises a second silica powder tank, a second venturi tube, a third discharge tube, a third feed tube, and a second feed tube;

the second silicon powder tank is provided with an outlet, and the second Venturi tube is provided with a first inlet, a second inlet and an outlet;

an outlet of the second silicon powder tank is communicated with a first inlet of the second Venturi tube through the third discharge pipe; the outlet of the blowing-assisting device is communicated with the second inlet of the second Venturi tube through the second air inlet tube; and the outlet of the second Venturi tube is communicated with the first inlet of the fluidized bed through the third feeding tube.

Optionally, in one embodiment, the system further comprises a fourth tapping pipe;

the outlet of the second silicon powder tank is communicated with the second position of the third feeding pipe through the fourth discharging pipe, and the second position is between the second Venturi pipe and the fluidized bed

In a second aspect, embodiments herein provide a silicone monomer production method for producing a silicone monomer using the silicone monomer production system provided in the first aspect of embodiments herein, the method comprising:

leading out auxiliary blowing air from the auxiliary blowing air device, and introducing the auxiliary blowing air into the first Venturi tube through the first air inlet tube;

guiding silicon powder out of the first silicon powder tank, and introducing the silicon powder into the first Venturi tube through the first discharge pipe;

the auxiliary blowing gas and the silicon powder are mixed in the first Venturi tube and are input into the fluidized bed through the first feeding pipe.

Optionally, in an embodiment, the method further comprises:

and adjusting the flow of the silicon powder input into the fluidized bed by adjusting the pressure of the blowing assisting gas.

The beneficial effects brought by the embodiment of the application are as follows:

adopt organosilicon monomer production system that this application embodiment provided, the system includes: the device comprises a fluidized bed, a first silicon powder tank, a first Venturi tube, a blowing assisting device, a first discharge tube, a first feed tube and a first air inlet tube; the fluidized bed is provided with a first inlet, the first silicon powder tank is provided with an outlet, the first Venturi tube is provided with a first inlet, a second inlet and an outlet, and the blowing-assisting device is provided with an outlet; an outlet of the first silicon powder tank is communicated with a first inlet of the first Venturi tube through the first discharge pipe; an outlet of the blowing-assisting device is communicated with a second inlet of the first Venturi tube through the first air inlet tube; the outlet of the first venturi pipe is communicated with the first inlet of the fluidized bed through the first feeding pipe; through addding first venturi to and with the export of first silica flour jar and the first entry intercommunication of first venturi, will help the export of gas blowing device and the second entry intercommunication of first venturi for can utilize to let in the mode of helping the gas of going into to first venturi continuously, make and continuously form negative pressure region in the first venturi, and then can inhale silica flour in succession, and carry silica flour to the fluidized bed in succession. And, because the first venturi pipe throat pipe diameter is thinner, consequently the silica flour flow of carrying to the fluidized bed is also less. Therefore, through the organosilicon monomer production system that this application embodiment provided, can realize the continuous and a small amount of replenishment of silica flour, greatly reduced the influence to fluidized bed temperature, fluidized bed temperature can remain stable, and then is favorable to the reaction to go on steadily.

Drawings

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

FIG. 1 is a schematic structural diagram of a silicone monomer production system provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another silicone monomer production system provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another silicone monomer production system provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another silicone monomer production system provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another silicone monomer production system provided in an embodiment of the present application;

fig. 6 is a schematic flow chart of another method for producing silicone monomers provided in the examples herein.

Reference numerals are as follows:

10-an organosilicon monomer production system; 101-a fluidized bed; 102-a first silicon powder tank; 103-a first venturi tube; 104-blowing assisting device; 105-a first tapping pipe; 106 — a first feed tube; 107 — first intake pipe; 108-a distributor; 109 — a second feed tube; 110-a pressure device; 111-second tapping pipe; 112-a second silicon powder tank; 113 — a second venturi tube; 114-a third tapping pipe; 115 — third feed pipe; 116 — a second intake pipe; 117-fourth tapping pipe; 118-a methyl chloride storage device; 119-a heating device; 120-compressor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/", and generally means that the former and latter related objects are in an "or" relationship.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "transverse," "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 for convenience in describing the present application and to simplify the description, but 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 are not to be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 this application will be understood to be a specific case for those of ordinary skill in the art.

As described in the background of the present application, the current manner of adding silicon powder to the fluidized bed is generally intermittent: silicon powder is discontinuously led out from the silicon powder tank, and then the silicon powder is replenished into the fluidized bed through auxiliary blowing, wherein the interval time between two replenishing processes is about 5 minutes. However, the intermittent silicon powder feeding method is liable to cause great fluctuation of the bed temperature, which is not favorable for smooth reaction. In addition, through practice, the applicant finds that a silicon powder replenishing system corresponding to the intermittent silicon powder replenishing mode is limited by factors such as the size of a material conveying pipe, pressure control in a silicon powder tank, valve control and the like, and continuous and small-amount silicon powder replenishing is difficult to realize. That is, the silicon powder replenishing system corresponding to the intermittent silicon powder replenishing manner is difficult to avoid the influence on the bed temperature of the fluidized bed during silicon powder replenishment.

In view of the above, the embodiment of the present application provides an organosilicon monomer production system 10, so as to solve the problem that the current intermittent silicon powder replenishing manner easily causes great fluctuation of bed temperature, and is not favorable for stable reaction. As shown in FIG. 1, the system 10 comprises a fluidized bed 101, a first silica powder tank 102, a first venturi 103, a blowing aid 104, a first discharge pipe 105, a first feed pipe 106 and a first inlet pipe 107; the fluidized bed 101 has a first inlet, the first silica powder tank 102 has an outlet, the first venturi 103 has a first inlet, a second inlet and an outlet, and the blowing aid 104 has an outlet; the outlet of the first silica powder tank 102 is communicated with the first inlet of the first venturi tube 103 through the first discharge pipe 105; the outlet of the blow-assisting device 104 is communicated with the second inlet of the first venturi tube 103 through the first air inlet pipe 107; the outlet of the first venturi 103 communicates with the first inlet of the fluidized bed 101 through the first feeding pipe 106.

The fluidized bed 101 may be used, among other things, to provide a corresponding reaction vessel for the synthesis of organosilicon monomers (e.g., dimethyldichlorosilane). In the fluidized bed 101, silicon powder and methyl chloride are used as raw materials, and copper is used as a catalyst to produce organosilicon monomers. As the reaction proceeds, the raw material silicon powder is continuously consumed, and if the silicon powder is not supplemented, it is difficult to maintain the selectivity of the reaction, so that the yield of the target product (such as dimethyldichlorosilane) is low, and thus, the silicon powder needs to be supplemented to the fluidized bed 101 in the reaction process.

The first silicon powder tank 102 may be used to store silicon powder. More specifically, the first silicon powder tank 102 can be used to supplement silicon powder to the fluidized bed 101 during the reaction for producing the organosilicon monomer.

The blowing-aid device 104 can be used to provide blowing-aid gas, and the type of the blowing-aid gas can be set according to actual needs. The blow-assist apparatus 104 may be a tank for storing blow-assist gas.

The first venturi tube 103 may be used to continuously create a negative pressure, continuously draw silicon powder from the first silicon powder tank 102, mix the silicon powder with the assist gas, and continuously output a mixture of the silicon powder and the assist gas. Specifically, the outlet of the blowing assisting device 104 is communicated with the second inlet of the first venturi tube 103, so that the gas can be continuously introduced into the first venturi tube 103, and a negative pressure is continuously formed in the first venturi tube 103, and the continuous negative pressure can enable the first venturi tube 103 to continuously suck silicon powder from the first silicon powder tank 102. In the first venturi tube 103, the introduced assist gas is mixed with the sucked silicon powder, and then continuously output to the fluidized bed 101 through the outlet of the first venturi tube 103. In practical application, when the silicon powder supplement amount is met, the blowing assisting pressure provided by the blowing assisting device 104 can be properly increased, so that a larger negative pressure is generated in the first venturi tube 103, and the smoothness of silicon powder supplement is effectively ensured.

The first venturi 103 includes an inlet section, a convergent section, a throat and a divergent section configuration. In the embodiment of the present application, the pipe diameter at the inlet of the inlet section matches with the pipe diameter at the outlet of the first air inlet pipe 107, and the pipe diameter at the outlet of the diffuser section matches with the pipe diameter at the inlet of the first feeding pipe 106. Because the throat pipe diameter is thinner, the flow of the silicon powder output by the first venturi tube 103 is smaller, and the quantity of the silicon powder is smaller.

In the embodiment of the present application, the specification of the first venturi tube 103 may be calculated according to actual needs, and a certain margin may be properly maintained during design. For example, the required specification of the venturi is calculated according to the required silicon powder addition. The method specifically comprises the following steps: according to the calculation of the yield of the methyl chlorosilane monomer of 300 tons per day, when 243kg of silicon powder is consumed for producing one ton of methyl chlorosilane monomer, 72900kg of silicon powder is needed per day, and the feeding amount of the silicon powder per minute is 50-52kg; the corresponding Venturi specification is DN40 (nominal diameter is 40 mm), the design allowance is considered, and a Venturi tube with DN50 (nominal diameter is 50 mm) specification can be adopted in practical application.

In addition, the first venturi tube 103 is detachably mounted on the first discharge pipe 105, the first feed pipe 106, and the first intake pipe 107. When the amount of silicon powder required to be added to the fluidized bed 101 changes and the specification of the first venturi tube 103 cannot be met, the first venturi tube 103 can be detached and replaced by other target venturi tubes capable of meeting the silicon powder amount adding requirement. That is, the silicone monomer production system 10 provided by the embodiments herein may also include multiple backup venturis.

It can be understood that, with the organosilicon monomer production system 10 provided by the embodiment of the present application, the system 10 includes a fluidized bed 101, a first silica powder tank 102, a first venturi tube 103, a blowing-assisting device 104, a first discharge pipe 105, a first feed pipe 106, and a first inlet pipe 107; the fluidized bed 101 has a first inlet, the first silica powder tank 102 has an outlet, the first venturi 103 has a first inlet, a second inlet and an outlet, and the blowing-aid device 104 has an outlet; an outlet of the first silica powder tank 102 is communicated with a first inlet of the first venturi tube 103 through the first discharge pipe 105; the outlet of the blow-assisting device 104 is communicated with the second inlet of the first venturi tube 103 through the first air inlet pipe 107; the outlet of the first venturi 103 communicates with the first inlet of the fluidized bed 101 through the first feeding pipe 106; by additionally arranging the first venturi tube 103, communicating the outlet of the first silicon powder tank 102 with the first inlet of the first venturi tube 103, and communicating the outlet of the blowing assisting device 104 with the second inlet of the first venturi tube 103, a negative pressure region can be continuously formed in the first venturi tube 103 by continuously introducing the blowing assisting gas into the first venturi tube 103, and then silicon powder can be continuously sucked in and continuously conveyed to the fluidized bed 101. Moreover, since the throat diameter of the first venturi 103 is small, the flow rate of the silicon powder to be fed to the fluidized bed 101 is also small. Therefore, through the organosilicon monomer production system 10 that this application embodiment provided, can realize the continuous and a small amount of replenishment of silicon powder, greatly reduced the influence to fluidized bed 101 bed temperature, fluidized bed 101 bed temperature can remain stable, and then is favorable to the reaction to go on steadily.

In order to avoid that the gas introduced by the blowing-aid device 104 affects the reaction in the fluidized bed 101, in one embodiment, the blowing-aid device 104 is used for providing methyl chloride gas to purge the first gas inlet pipe 107.

The first air inlet pipe 107 is purged, that is, the blowing-assisting device 104 outputs methyl chloride gas to the first air inlet pipe 107, and the methyl chloride gas is input into the first venturi tube 103 through the first air inlet pipe 107.

It can be understood that, with the above solution, since the kind of the auxiliary blowing gas provided by the auxiliary blowing device 104 is methyl chloride gas, that is, the auxiliary blowing gas provided by the auxiliary blowing device 104 is one of the raw materials for synthesizing the organosilicon monomer in the fluidized bed 101, when the auxiliary blowing gas and the silicon powder are mixed in the first venturi tube 103 and enter the fluidized bed 101, the synthesis reaction of the organosilicon monomer in the fluidized bed 101 is not affected.

In order to further control the flow rate of the silicon powder introduced into the fluidized bed 101, the silicon powder is replenished as much as the silicon powder is consumed in the fluidized bed 101; as shown in fig. 2, in one embodiment, the silicone monomer production system 10 provided by the examples herein further includes a methyl chloride storage device 118, a heating apparatus 119, and a compressor 120; the methyl chloride storage device 118 has an outlet, the heating apparatus 119 has an inlet and an outlet, and the blowing aid device 104 also has an inlet; the outlet of the methyl chloride storage device 118 is connected with the inlet of the heating device 119, the outlet of the heating device 119 is communicated with the inlet of the blowing-assisting device 104, and the compressor 120 is connected with the blowing-assisting device 104.

The methyl chloride storage device 118 may be configured to store liquid methyl chloride. The liquid methyl chloride is heated by a heating device 119 to obtain gaseous methyl chloride, and the gaseous methyl chloride is conveyed to the blowing-assisted device 104. The outlet of the heating device 119 may be in communication with the inlet of the blow-assist apparatus 104 via a conduit.

In practical applications, a pressure regulating device may be disposed on the pipeline connecting the heating apparatus 119 and the blowing-assisting device 104 for regulating the pressure of the methyl chloride gas. In this way, the methyl chloride gas in the auxiliary blowing device 104 (which may be a tank in this case) can be stored at a certain pressure; further, the blow-assist apparatus 104 may provide methyl chloride gas having a target pressure to the first venturi 103. The target pressure may be set as desired.

The compressor 120 may specifically be an air compressor. In the embodiment of the present application, when the pressure adjusting device is adjusted and still cannot meet the requirement of the blowing assisting gas pressure required by the first venturi tube 103, the pressure of the methyl chloride gas output by the blowing assisting device 104 may be further adjusted by adjusting the compressor 120. Further, the negative pressure formed in the first venturi tube 103 is adjusted, so that the amount of silicon powder sucked in by the first venturi tube 103 can be adjusted.

It can be understood that, with the above-mentioned solution, the amount of silicon powder sucked by the first venturi tube 103 can be adjusted by adjusting the pressure of the chloromethane gas output by the blowing-assisting device 104, so that the flow rate of the silicon powder introduced into the fluidized bed 101 can be adjusted. For example, when the silicon powder is consumed in the fluidized bed 101 more, and the flow rate of the silicon powder introduced into the fluidized bed 101 needs to be increased, the pressure of the methyl chloride gas output by the blowing-assisting device 104 can be increased; when less silicon powder is consumed in the fluidized bed 101 and the flow rate of the silicon powder introduced into the fluidized bed 101 needs to be reduced, the pressure of the methyl chloride gas output by the blowing assistant device 104 can be reduced.

In the above embodiment, the raw material gas methyl chloride directly introduced into the fluidized bed 101 during the synthesis of the organosilicon monomer may be the same gas source as the methyl chloride introduced into the first venturi 103. Further, as shown in fig. 3, in one embodiment, the silicone monomer production system 10 provided by the examples herein further comprises a distributor 108 and a second feed tube 109; the distributor 108 has an inlet and a first outlet, the heating device 119 has a first outlet and a second outlet, the fluidized bed 101 also has a second inlet; the first outlet of the heating device 119 is communicated with the inlet of the distributor 108, the first outlet of the distributor 108 is communicated with the inlet of the blowing-assisting device 104, and the second outlet of the heating device 119 is communicated with the second inlet of the fluidized bed 101 through the second feeding pipe 109.

Wherein the distributor 108 may also be referred to as a flow splitter. In practical applications, the distributor 108 may further have a second outlet, and the second outlet may be connected to a fine powder tank for collecting the silicon powder and copper powder in the product of the fluidized bed 101, so as to send the silicon powder and copper powder in the fine powder tank back to the fluidized bed 101. Specifically, after the silicon powder and the copper powder are separated from the product of the fluidized bed 101 by the cyclone separator, the separated silicon powder and copper powder are stored in the fine powder tank, and the gas with a certain pressure is provided to the fine powder tank through the second outlet of the distributor 108, so that the silicon powder and copper powder in the fine powder tank are sent back to the fluidized bed 101. The pressure regulating means may be provided on a pipe communicating the heating device 119 and the distributor 108.

In the above embodiment, the flow rate of silicon powder to be fed into the fluidized bed 101 can be increased by increasing the pressure of the methyl chloride gas output from the auxiliary blowing device 104, but it is considered that there may be the following cases: even if the pressure of the methyl chloride gas output by the blowing aid device 104 is increased to the upper limit value that can be provided by the compressor 120, the demand of the flow rate of the silicon powder during the continuous silicon powder replenishment cannot be met. Thus, in one embodiment, as shown in fig. 4, the silicone monomer production system 10 provided in the examples herein further includes a pressurization device 110; the pressurizing device 110 is connected to the first silica powder tank 102.

The pressurizing device 110 may be configured to pressurize the silicon powder in the first silicon powder tank 102, so as to increase the amount of the silicon powder conveyed from the first silicon powder tank 102 to the first venturi tube 103. Specifically, the pressurizing device 110 may inject a gas, which may be nitrogen, into the first silicon powder tank 102 to pressurize the silicon powder inside.

It can be understood that, with the above-mentioned solution, the silicon powder in the first silicon powder tank 102 is pressurized by the pressurizing device 110, and the amount of the silicon powder conveyed to the first venturi tube 103 is increased, so that the flow rate of the silicon powder introduced into the fluidized bed 101 can be further increased. It should be understood that, since the throat diameter of the first venturi tube 103 is small, even if the flow rate of the silicon powder continuously introduced into the fluidized bed 101 is increased by the above-mentioned methods, the flow rate is still much smaller than that when the silicon powder is intermittently replenished, that is, the silicon powder can be continuously replenished in a small amount, the influence on the bed temperature of the fluidized bed 101 can be reduced, and the bed temperature of the fluidized bed 101 can be kept stable.

Considering that there may be a case where a large amount of silicon powder needs to be replenished to the fluidized bed 101 in a short time in practical application, as shown in fig. 5, in one embodiment, the organosilicon monomer production system 10 provided in the example of the present application further includes a second discharging pipe 111, and the outlet of the first silicon powder tank 102 is communicated with a first position a of the first feeding pipe 106 through the second discharging pipe 111, and the first position a is between the first venturi tube 103 and the fluidized bed 101.

Wherein the second tapping pipe 111 can be opened when a large amount of silicon powder needs to be added to the fluidized bed 101.

The first location a is between the first venturi 103 and the fluidized bed 101, which is also understood to be between the inlet and the outlet of the first feed pipe 106.

It can be understood that, with the above solution, by additionally providing the second discharge pipe 111 and communicating the outlet of the first silicon powder tank 102 with the first position a of the first feed pipe 106 through the second discharge pipe 111, a large amount of silicon powder can be added to the fluidized bed 101 by opening the second discharge pipe 111. In this case, the first discharge pipe 105 may be further closed, and the auxiliary blowing gas provided by the auxiliary blowing device 104 may be blown to the first position a via the first venturi tube 103, thereby intermittently and massively conveying the silicon powder to the fluidized bed 101. To further increase the amount of silicon powder delivered to the fluidized bed 101, the pressurization device 110 may also be activated to pressurize the silicon powder in the first silicon powder tank 102.

In order to further ensure the continuity of adding silicon powder to the fluidized bed 101 and avoid the influence on the bed temperature, as shown in fig. 5, in one embodiment, the organosilicon monomer production system 10 provided in the embodiment of the present application further includes a second silicon powder tank 112, a second venturi tube 113, a third discharge tube 114, a third feed tube 115, and a second inlet tube 116; the second silica powder tank 112 has an outlet, and the second venturi 113 has a first inlet, a second inlet, and an outlet; an outlet of the second silica powder tank 112 is communicated with a first inlet of the second venturi tube 113 through the third discharging pipe 114; the outlet of the blowing-assisting device 104 is communicated with the second inlet of the second venturi 113 through the second air inlet pipe 116; the outlet of the second venturi 113 is in communication with the first inlet of the fluidized bed 101 via the third feed pipe 115.

The second silicon powder tank 112 may be used to store silicon powder. More specifically, the second silicon powder tank 112 can be used for supplementing silicon powder to the fluidized bed 101 during the reaction process for producing the organosilicon monomer.

The outlet of the third feed pipe 115 may be directly connected to the first inlet of the fluidized bed 101, or the outlet of the third feed pipe 115 may also communicate with a target location of the first feed pipe 106, which may be between the inlet and the outlet of the first feed pipe 106. More specifically, the target position may be downstream of the first position a. In the embodiment of the application, the upstream and the downstream are determined according to the material flow direction.

The second venturi tube 113 may be used to continuously create the negative pressure, continuously suck the silicon powder from the second silicon powder tank 112, mix the silicon powder with the assist gas, and continuously output the mixture of the silicon powder and the assist gas. Specifically, the outlet of the blowing-assisting device 104 is communicated with the second inlet of the second venturi tube 113, so that the gas can be continuously introduced into the second venturi tube 113, and then the negative pressure is continuously formed in the second venturi tube 113, and the continuous negative pressure can enable the second venturi tube 113 to continuously suck silicon powder from the second silicon powder tank 112. In the second venturi tube 113, the introduced blowing-assisting gas is mixed with the sucked silicon powder, and then continuously output to the fluidized bed through the outlet of the second venturi tube 113.

The second venturi tube 113 includes an inlet section, a convergent section, a throat and a divergent section configuration. In the embodiment of the present application, the pipe diameter at the inlet of the inlet section matches with the pipe diameter at the outlet of the second air inlet pipe 116, and the pipe diameter at the outlet of the diffuser section matches with the pipe diameter at the inlet of the third air inlet pipe 115. Because the throat pipe diameter is smaller, the flow rate of the silicon powder output by the second venturi tube 113 is smaller, and the quantity of the silicon powder is smaller.

By adopting the above scheme, the second venturi tube 113 is additionally arranged, the outlet of the second silicon powder tank 112 is communicated with the first inlet of the second venturi tube 113, and the outlet of the blowing assisting device 104 is communicated with the second inlet of the second venturi tube 113, so that the silicon powder conveying pipeline corresponding to the second venturi tube 113 can also realize continuous and small-amount supplement of silicon powder. In practical applications, when the silicon powder in the first silicon powder tank 102 is used up, if the input of the silicon powder is performed after the silicon powder is refilled into the first silicon powder tank 102, the input of the silicon powder is interrupted, and the bed temperature of the fluidized bed 101 may be greatly affected when the input of the silicon powder is performed again. Similarly, when the silicon powder conveying line corresponding to the first venturi tube 103 fails, if the input of silicon powder is performed after the failure is repaired, the input of silicon powder is interrupted, and the bed temperature of the fluidized bed 101 may be greatly affected when the input of silicon powder is performed again. By additionally arranging the silicon powder conveying pipeline corresponding to the second venturi tube 113, when the silicon powder in the first silicon powder tank 102 is used up or the silicon powder conveying pipeline corresponding to the first venturi tube 103 fails, the silicon powder can be continuously and slightly supplemented by the silicon powder conveying pipeline corresponding to the second venturi tube 113, so that the continuity of supplementing silicon powder to the fluidized bed 101 can be ensured as much as possible, and the bed temperature is further prevented from being influenced.

In consideration of the fact that when the silicon powder in the first silicon powder tank 102 is used up or the silicon powder conveying pipeline corresponding to the first venturi tube 103 fails, when the silicon powder is replenished by using the silicon powder conveying pipeline corresponding to the second venturi tube 113, there may be a case where a large amount of silicon powder needs to be replenished to the fluidized bed 101 in a short time. Thus, as shown in fig. 5, in one embodiment, the silicone monomer production system 10 provided in the examples herein further includes a fourth tapping pipe 117; the outlet of the second silica powder tank 112 is connected to a second position B of the third feeding pipe 115 through the fourth discharging pipe 117, and the second position B is between the second venturi pipe 113 and the fluidized bed 101.

Wherein the fourth tapping pipe 117 can be opened when a large amount of silicon powder needs to be added to the fluidized bed 101.

The second location B is between the second venturi 113 and the fluidized bed 101, which can also be understood as being between the inlet and the outlet of the third feed pipe 115.

In addition, in the embodiment of the present application, a valve M may be disposed on each pipeline according to actual needs, as shown in fig. 5. It should be understood that the positions and the number of the valves M in fig. 5 are only schematic and not limiting, and other pipelines may be provided with the valves M.

It can be understood that, with the above solution, by adding the fourth discharging pipe 117 and communicating the outlet of the second silicon powder tank 112 with the second position B of the third feeding pipe 115 through the fourth discharging pipe 117, a large amount of silicon powder can be added to the fluidized bed 101 by opening the fourth discharging pipe 117. In this case, the third discharging pipe 114 may be further closed, and the auxiliary blowing gas provided by the auxiliary blowing device 104 may be blown to the second position B via the second venturi 113, so as to intermittently and largely deliver the silicon powder to the fluidized bed 101. To further increase the amount of silicon powder delivered to the fluidized bed 101, the silicon powder in the second silicon powder tank 112 may also be pressurized. Specifically, the pressurizing device 110 may be used to pressurize the silicon powder in the second silicon powder tank 112, or another pressurizing device may be connected to the second silicon powder tank 112 to pressurize the silicon powder in the second silicon powder tank 112.

Based on the silicone monomer production system 10 provided in the above embodiments of the present application, embodiments of the present application also provide a method for producing silicone monomers by using the silicone monomer production system 10, as shown in fig. 6, the method for producing silicone monomers may include the following steps:

step 201, leading out auxiliary blowing air from the auxiliary blowing air device, and leading the auxiliary blowing air into the first Venturi tube through the first air inlet tube.

The auxiliary blowing air is led out from the auxiliary blowing air device, and the auxiliary blowing air can be understood as the auxiliary blowing air output by the auxiliary blowing air device. More specifically, the assist air blowing device may continuously output the assist air blowing.

Step 202, guiding silicon powder out of the first silicon powder tank, and introducing the silicon powder into the first venturi tube through the first discharge pipe.

In this application embodiment, follow silica flour first silica flour jar is derived, through first discharging pipe will silica flour lets in first venturi can be based on the negative pressure in the first venturi, and silica flour is derived from first silica flour jar in succession passively. Specifically, the blowing assisting device continuously inputs blowing assisting gas to the first venturi tube, so that negative pressure is continuously formed in the first venturi tube, and the continuous negative pressure can enable the first venturi tube to continuously suck silicon powder from the first silicon powder tank.

And 203, mixing the blowing assisting gas and the silicon powder in the first Venturi tube, and inputting the mixture into the fluidized bed through the first feeding pipe.

In the first Venturi tube, the introduced auxiliary blowing gas is mixed with the introduced silicon powder, and then the mixture is continuously output to the fluidized bed through the first feeding pipe.

The first venturi tube includes an inlet section, a convergent section, a throat, and a divergent section configuration. Wherein, the pipe diameter of entrance and the pipe diameter phase-match of first intake pipe exit position, the pipe diameter of diffuser section exit and the pipe diameter phase-match of first inlet pipe entry position. Because the throat pipe diameter is thinner, the flow of the silicon powder output by the first Venturi tube is smaller, and the quantity of the silicon powder is less.

It can be understood that, by using the method for producing silicone monomers provided in the embodiments of the present application, which uses the system 10 for producing silicone monomers provided in the embodiments of the present application to produce silicone monomers, a negative pressure zone can be continuously formed in the first venturi tube by continuously introducing the assist gas into the first venturi tube, so as to continuously suck silicon powder, and continuously convey the silicon powder to the fluidized bed. And, because the first venturi pipe throat pipe diameter is thinner, consequently the silica flour flow of carrying to the fluidized bed is also less. Therefore, through the organosilicon monomer production system 10 that this application embodiment provided, can realize the continuous and a small amount of replenishment of silica flour, greatly reduced the influence to fluidized bed temperature, fluidized bed temperature can remain stable, and then is favorable to the reaction to go on steadily.

In order to control the flow of the silicon powder introduced into the fluidized bed conveniently, the silicon powder is supplemented by the consumption of the silicon powder in the fluidized bed 101; in one embodiment, the silicone monomer production method provided in the examples herein further comprises: and adjusting the flow of the silicon powder input into the fluidized bed by adjusting the pressure of the blowing assisting gas.

In this application embodiment, can adjust the pressure of the chloromethane gas of helping the gas blowing device output through adjusting pressure adjusting device and/or compressor, and then the negative pressure that forms in first venturi obtains adjusting, and the inhaled silicon powder volume of first venturi obtains adjusting to can adjust the silicon powder flow that lets in the fluidized bed. For example, when the silicon powder is consumed in the fluidized bed more and the flow rate of the silicon powder introduced into the fluidized bed needs to be increased, the pressure of the methyl chloride gas output by the blowing-assisting device can be increased; when less silicon powder is consumed in the fluidized bed and the flow rate of the silicon powder introduced into the fluidized bed needs to be reduced, the pressure of the methyl chloride gas output by the blowing assisting device can be reduced.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises that element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A silicone monomer production system, comprising: the device comprises a fluidized bed, a first silicon powder tank, a first Venturi tube, a blowing assisting device, a first discharge tube, a first feed tube and a first air inlet tube;

2. The silicone monomer production system of claim 1, wherein the co-blowing device is configured to provide methyl chloride gas to purge the first inlet pipe.

3. The silicone monomer production system of claim 2, further comprising a methyl chloride storage device, a heating apparatus, and a compressor;

4. The silicone monomer production system of claim 3, further comprising a dispenser and a second feed tube;

wherein the distributor has an inlet and a first outlet, the heating apparatus has a first outlet and a second outlet, the fluidized bed further has a second inlet;

5. The silicone monomer production system of claim 3, further comprising a pressurization device;

the pressurizing device is connected with the first silicon powder tank.

6. The silicone monomer production system of claim 1, further comprising a second discharge pipe,

7. The silicone monomer production system of claim 6, further comprising a second silicone powder tank, a second venturi tube, a third discharge tube, a third feed tube, and a second inlet tube;

8. The silicone monomer production system of claim 7, further comprising a fourth tapping pipe;

and the outlet of the second silicon powder tank is communicated with the second position of the third feeding pipe through the fourth discharging pipe, and the second position is between the second Venturi pipe and the fluidized bed.

9. A method of producing silicone monomers using the silicone monomer production system of any one of claims 1 to 8, the method comprising:

silicon powder is led out from the first silicon powder tank, and the silicon powder is led into the first Venturi tube through the first discharge pipe;

and the blowing-assisting gas and the silicon powder are mixed in the first Venturi tube and are input into the fluidized bed through the first feeding pipe.

10. The method of claim 9, further comprising: