Cold hydrogenation fluidized bed reactor

Abstract

The utility model discloses a cold hydrogenation fluidized bed reactor and relates to the technical field of fluidized bed reactors. The utility model discloses a reactor which comprises a reactor container and more than one cyclone separator, and the more than one cyclone separator is arranged at the top of an inner cavity of the reactor container and is arranged around a central shaft of the reactor container at intervals; the inlet of the cyclone separator is communicated with the inner cavity of the reactor container, the inlet at the bottom end of the cyclone separator is connected with a discharge pipe, and the opening direction of a blanking port at the bottom end of the discharge pipe is along the tangential direction of the side wall body of the reactor container.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic manufacturing technical field, concretely relates to cold hydrogenation fluidized bed reactor. BACKGROUND

[0002] In the related art, the fluidized bed reactor appears the bed layer pressure difference instability, the pressure difference fluctuation frequently and the reaction fluidization effect is not good after operating for a period of time, the built-in cyclone separator pressure difference exceeds the control range, the fluidized bed reactor local temperature has the overtemperature phenomenon, makes the product trichlorosilane yield continuously below the design value.

[0003] After the fluidized bed inside inspection, it is found that there is silicon powder accumulation in the center of the fluidized bed reactor, the accumulated silicon powder causes the reactor internal airflow to diffuse from all around, generates an inward force to the cyclone separator discharge pipe in the middle position, the inward force causes the cyclone separator leg and the support to appear the deformation towards the center direction, makes the wing valve mechanism arranged in the discharge pipe material falling port unable to work normally, the cyclone separator loses its original function, further causes the fluidized bed reactor material hydrogen, gaseous STC and silicon powder contact area to reduce, the reaction is not sufficient, the yield decreases.

[0004] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is publicly known. CONTENT OF UTILITY MODEL

[0005] The utility model aims at solving the technical problem of the prior art, provides a kind of cold hydrogenation fluidized bed reactor, it is helpful to the normal fluidization of reactor.

[0006] To solve the above technical problem, the utility model discloses a kind of cold hydrogenation fluidized bed reactor, including reactor container and cyclone separator, the cyclone separator is equipped with more than one, more than one The cyclone separator is arranged in the top of the reactor container inner chamber and is arranged at intervals around the center axis of the reactor container;The inlet of the cyclone separator is communicated with the reactor container inner chamber, and the bottom end of the cyclone separator is connected with discharge pipe, and the opening direction of the material falling port of the bottom end of the discharge pipe is along the tangential direction of the reactor container side wall body.

[0007] The fluidized bed reactor of the utility model by the opening direction of the material falling port of the bottom end of the discharge pipe is along the tangential direction of the reactor container side wall body and is arranged, makes silicon powder scattered and falls out from the bottom end material falling port, both conducive to the silicon powder not concentrated accumulation, and conducive to the normal fluidization of reactor.

[0008] Specifically, the reactor vessel has a gas-solid feeding port in communication with the reactor vessel inner cavity, and an air outlet in communication with the gas outlet of the cyclone separator.

[0009] Specifically, the air outlet is arranged at the top end of the reactor vessel, and the gas-solid feeding port is arranged at the middle of the bottom end of the reactor vessel.

[0010] Specifically, the air outlet is connected with an air outlet pipeline, and the gas-solid feeding port is connected with a feeding pipeline.

[0011] Specifically, the bottom end discharge port of the discharge pipe is provided with a flap valve mechanism, and the flap valve mechanism comprises a flap valve tongue plate capable of opening or closing the bottom end discharge port of the discharge pipe.

[0012] Specifically, the flap valve mechanism comprises a first hinge shaft, a connecting piece and a second hinge shaft, the top end of the flap valve tongue plate is hinged to one end of the connecting piece through the first hinge shaft, and the other end of the connecting piece is hinged to the discharge pipe through the second hinge shaft.

[0013] Further, the flap valve mechanism further comprises a flap valve tongue plate protection plate arranged on the side of the flap valve tongue plate away from the bottom end discharge port of the discharge pipe, and the upper end of the flap valve tongue plate protection plate is closer to the bottom end discharge port of the discharge pipe than the lower end.

[0014] Specifically, the flap valve tongue plate protection plate is fixedly connected with the discharge pipe through a protection plate support frame.

[0015] Specifically, the reactor comprises a bubble breaker installed at the bottom of the reactor vessel inner cavity and below the flap valve mechanism, and the bottom end of the bubble breaker is in communication with the reactor vessel to form a gas buffer cavity.

[0016] Specifically, one or more cyclone separators are uniformly arranged around the central axis of the reactor vessel.

[0017] Advantages:

[0018] 1. The fluidized bed reactor of the utility model has the advantages that the opening direction of the bottom end discharge port of the discharge pipe is arranged along the tangential direction of the side wall of the reactor vessel, so that the silicon powder flowing out of the bottom end discharge port is dispersed and falls, which is beneficial to the normal fluidization of the reactor and the maintenance of the normal operating temperature of the reactor.

[0019] 2. The utility model adopts an anti-stuck wing valve mechanism, and further adds a wing valve tongue plate protection plate. During operation, the wing valve tongue plate protection plate blocks the external silicon powder, preventing the wing valve tongue plate from being worn due to the erosion of external silicon powder, thereby extending the service life of the wing valve tongue plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more apparent.

[0021] Figure 1 A schematic diagram of the internal structure of a cold hydrogenation fluidized bed reactor provided in one embodiment of the present invention;

[0022] Figure 2 For the sake of Figure 1 A top view of the cold hydrogenation fluidized bed reactor of line AA;

[0023] Figure 3 A schematic diagram of the assembly structure of a wing valve mechanism, a discharge pipe, and a wing valve tongue plate protective plate provided in one embodiment of the present utility model.

[0024] Description of the accompanying drawings:

[0025] 1. Reactor vessel; 11. Gas-solid feed port; 111. Feed pipeline; 12. Air outlet; 121. Air outlet pipeline; 3. Discharge pipe; 2. Cyclone separator; 31. Bottom drop port; 4. Wing valve mechanism; 41. Wing valve tongue plate; 42. First hinge shaft; 43. Connecting piece; 44. Second hinge shaft; 5. Wing valve tongue plate protective plate; 6. Bubble breaker; 7. Gas buffer chamber; 8. Protective plate support frame; 9. Inspection port. DETAILED DESCRIPTION

[0026] Example 1

[0027] Combine Figures 1 to 3 As shown, this embodiment provides a cold hydrogenation fluidized bed reactor, which includes a reactor vessel 1 and cyclone separators 2. Four cyclone separators 2 are provided, each disposed at the top of the inner cavity of the reactor vessel 1 and spaced apart around the central axis of the reactor vessel 1. The inlet of the cyclone separator 2 is connected to the inner cavity of the reactor vessel 1, and the bottom inlet of the cyclone separator 2 is connected to a discharge pipe 3. The opening direction of the bottom end discharge port 31 of the discharge pipe 3 is along the tangential direction of the side wall of the reactor vessel 1.

[0028] It should be understood that the number of cyclone separators 2 can be set according to actual needs.

[0029] Preferably, the four cyclone separators 2 are evenly spaced around the central axis of the reactor vessel 1 .

[0030] As shown in Figure 1 and Figure 2 As shown in

[0031] As shown in Figure 1 and Figure 2 As shown in

[0032] As shown in Figure 1 As shown in

[0033] In this embodiment, as shown in Figure 2 As shown in

[0034] As shown in Figure 3 As shown in Figure 3 A view of the wing valve mechanism 4 along a radial direction of the reactor vessel 1 is shown.

[0035] As shown in Figure 3 As shown in

[0036] As shown in Figure 3 As shown in

[0037] In this embodiment, by providing the wing valve tongue protection plate 5, the wing valve tongue protection plate 5 shields the external silicon powder during operation, preventing the wing valve tongue 41 from being eroded by the external silicon powder.

[0038] As shown in Figure 3As shown, the wing valve tongue plate guard plate 5 is fixedly connected with the discharge pipe 3 through the guard plate support frame 8.

[0039] In combination Figure 1 As shown, the reactor comprises a bubble breaker 6 which is installed at the bottom of the inner cavity of the reactor container 1 and below the wing valve mechanism 4, and the bottom end of the bubble breaker 6 and the reactor container 1 form a gas buffer cavity 7.

[0040] The specific structure of the bubble breaker 6 is the prior art, for example, the bubble breaker structure disclosed in the Chinese patent application CN116808961A “Gas-solid fluidized bed bubble breaker and cold hydrogenation fluidized bed reactor comprising the bubble breaker” can be used.

[0041] In combination Figure 1 As shown, the reactor container 1 comprises an access opening 9 for human access, which is located at the top end of the reactor container 1 and communicates with the inner cavity of the reactor container 1.

[0042] Next, the use method of the cold hydrogenation fluidized bed reactor of the utility model in the cold hydrogenation reaction process will be described with reference to Figures 1 to 3 The use method of the cold hydrogenation fluidized bed reactor of the utility model in the cold hydrogenation reaction process will be described.

[0043] Figure 1 The cold hydrogenation fluidized bed reactor is a fluidized bed reactor, raw materials including hydrogen, silicon powder and silicon tetrachloride enter the inner cavity of the reactor container 1 from the gas-solid feed port 11, the cyclone separator 2 is used for separating hydrogen and silicon powder, the separated gas is discharged from the air outlet 12, and the solid silicon powder is accumulated in the discharge pipe 3, and when a certain weight, for example, 25kg, is reached, the wing valve mechanism 4 is opened, and the silicon powder falls down.

[0044] The utility model provides a kind of cold hydrogenation fluidized bed reactor's thought and method, the method and approach of specifically realizing this technical scheme are many, above-mentioned only is the preferred embodiment of the utility model, it should be pointed out, for the ordinary skilled in the art of this technology, without departing from the principle of the utility model, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The components not explicitly described in the embodiment can be realized by prior art.

Claims

1. A cold hydrogenation fluidized bed reactor comprising a reactor vessel (1) and a cyclone (2), characterized in that, The cyclone separator (2) is provided with one or more than one cyclone separator (2), which is arranged at the top of the inner cavity of the reactor vessel (1) and is spaced around the central axis of the reactor vessel (1); the inlet of the cyclone separator (2) is communicated with the inner cavity of the reactor vessel (1), and the bottom end of the cyclone separator (2) is connected with a discharge pipe (3), and the opening direction of the bottom end discharge port (31) of the discharge pipe (3) is along the tangential direction of the side wall of the reactor vessel (1).

2. The cold hydrogenation fluid bed reactor according to claim 1, characterized in that, The reactor vessel (1) has a gas-solid feeding port (11) and an air outlet (12), and the gas-solid feeding port (11) is communicated with the inner cavity of the reactor vessel (1); the gas outlet of the cyclone separator (2) is communicated with the air outlet (12) of the reactor vessel (1).

3. The cold hydrogenation fluid bed reactor of claim 2, wherein, The air outlet (12) is arranged at the top end of the reactor vessel (1), and the gas-solid feeding port (11) is arranged at the middle part of the bottom end of the reactor vessel (1).

4. The cold hydrogenation fluid bed reactor according to claim 3, characterized in that, The air outlet (12) is connected with an air outlet pipeline (121), and the gas-solid feeding port (11) is connected with a feeding pipeline (111).

5. The cold hydrogenation fluid bed reactor of claim 1, wherein, The bottom end discharge port (31) of the discharge pipe (3) is provided with a wing valve mechanism (4), and the wing valve mechanism (4) comprises a wing valve tongue plate (41), which can open or close the bottom end discharge port (31) of the discharge pipe (3).

6. The cold hydrogenation fluid bed reactor according to claim 5, characterized in that, The wing valve mechanism (4) comprises a first hinge shaft (42), a connecting piece (43) and a second hinge shaft (44), the top end of the wing valve tongue plate (41) is hinged to one end of the connecting piece (43) through the first hinge shaft (42), and the other end of the connecting piece (43) is hinged to the discharge pipe (3) through the second hinge shaft (44).

7. The cold hydrogenation fluid bed reactor of claim 5, wherein, The wing valve mechanism (4) further comprises a wing valve tongue plate protection plate (5), which is arranged on the side of the wing valve tongue plate (41) away from the bottom end discharge port (31) of the discharge pipe (3), and the upper end of the wing valve tongue plate protection plate (5) is closer to the bottom end discharge port (31) of the discharge pipe (3) than the lower end.

8. The cold hydrogenation fluid bed reactor according to claim 7, characterized in that, The wing valve tongue plate protection plate (5) is fixedly connected with the discharge pipe (3) through a protection plate support frame (8).

9. The cold hydrogenation fluid bed reactor of claim 5, wherein, A bubble breaker (6) is arranged at the bottom of the inner cavity of the reactor vessel (1) and below the wing valve mechanism (4), and the bottom end of the bubble breaker (6) and the reactor vessel (1) form a gas buffer cavity (7).

10. The cold hydrogenation fluid bed reactor of claim 1, wherein, One or more than one cyclone separator (2) is uniformly spaced around the central axis of the reactor vessel (1).

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