Temperature adjusting device of water quenching equipment

Abstract

The utility model provides a temperature adjusting device of water quenching equipment, which comprises a temperature adjusting interlayer provided with a first hot flow inlet, a first cold flow inlet and a first cold flow outlet; a reduction furnace; the heat exchanger is provided with a second hot flow inlet, a second cold flow inlet, a hot flow outlet and a cold flow outlet; the cold flow inlet pipe is connected with the first cold flow inlet; the outflow pipe is connected with the outlet; wherein the temperature adjusting interlayer is positioned between the wall surface of the water quenching equipment and the wall of the silicon material conveying channel; the second heat flow inlet is connected with the reduction furnace; the heat flow outlet is connected with the first heat flow inlet; after high-temperature circulating water in the reduction furnace is cooled by the heat exchanger, the high-temperature circulating water is discharged into the temperature adjusting interlayer to carry out heat preservation on the water quenching equipment when the furnace is shut down, so that the temperature rising time when the water quenching equipment needs to be used is shortened, the electric power cost is reduced, and the heat of the reduction furnace is recycled; when the equipment needs to be overhauled or maintained, low-temperature water is discharged into the temperature adjusting interlayer, cooling of the equipment is accelerated, and therefore the utilization rate of the equipment is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon production, in particular to a temperature regulating device for water quenching equipment. Background Art

[0002] With the advancement of single crystal technology and production capacity, polysilicon, as the direct raw material for the production of monocrystalline silicon, has achieved rapid growth in China in recent years. The polysilicon rods produced in the reduction furnace need to be crushed into the bulk raw materials necessary for monocrystalline silicon production for packaging and storage. Therefore, the crushing of polysilicon rods is an important step in the post-processing of polysilicon plants.

[0003] At present, most polysilicon rods are crushed mechanically. Although mechanical crushing is efficient and requires less manpower, if the polysilicon is not heated and rapidly cooled, direct mechanical crushing will produce a large proportion of silicon powder, which is usually three times that of traditional manual crushing, resulting in silicon material loss. If the polysilicon is heated and rapidly cooled, the proportion of silicon powder can be greatly reduced, and at the same time, the shape of the material after the subsequent crushing process is highly consistent, and the purity of the silicon material can be improved. Therefore, in order to reduce the proportion of silicon powder, the polysilicon rods are usually water quenched before being crushed. The water quenching treatment is completed by water quenching equipment.

[0004] However, in the existing technology, the temperature-raising process of water quenching equipment from shutdown to production relies on electric heating, which consumes a large amount of electricity, resulting in high electricity costs. In addition, when the equipment needs to be shut down for inspection or maintenance, the waiting time for the equipment to cool down is too long, which reduces the utilization rate of the equipment and thus affects production. Utility Model Content

[0005] The purpose of the present utility model is to provide a temperature regulating device for water quenching equipment, so as to solve the problem raised in the above background technology that the temperature raising process of the existing water quenching equipment from shutdown to production relies on electric heating, which consumes a large amount of electricity, resulting in high electricity costs, and when the equipment needs to be shut down for inspection or maintenance, the time waiting for the equipment to cool down is too long, which reduces the utilization rate of the equipment and thus affects the output.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A temperature regulating device for water quenching equipment, comprising:

[0008] a temperature regulating interlayer, on which a first hot flow inlet, a first cold flow inlet and an outlet are provided;

[0009] reduction furnace;

[0010] A heat exchanger, wherein the heat exchanger is provided with a second hot flow inlet, a second cold flow inlet, a hot flow outlet, and a cold flow outlet;

[0011] a cold flow inlet pipe connected to the first cold flow inlet;

[0012] an outlet pipe connected to the outlet;

[0013] The temperature regulating interlayer is located between the wall of the water quenching equipment and the wall of the silicon material conveying channel; the second heat flow inlet is connected to the reduction furnace, and the heat flow outlet is connected to the first heat flow inlet.

[0014] Preferably, it further comprises a water tank, which comprises a cold flow chamber and a hot flow chamber; the cold flow chamber is respectively connected to the second cold flow inlet and the cold flow inlet pipe, and the hot flow chamber is respectively connected to the cold flow outlet and the outflow pipe.

[0015] Preferably, a connecting pipe is provided between the cold flow chamber and the hot flow chamber, and a first control valve and a first pumping valve are provided on the connecting pipe.

[0016] Preferably, a temperature insulating layer is provided between the cold flow cavity and the hot flow cavity.

[0017] Preferably, a second water pump is provided on both the second hot flow inlet and the second cold flow inlet.

[0018] Preferably, the cold flow inlet pipe and the cold flow outlet pipe are both provided with a second control valve and a third water pump.

[0019] Preferably, a temperature detector is provided on the outer side of the wall of the water quenching equipment.

[0020] Preferably, a thermal insulation layer is provided on the inner side of the wall surface of the water quenching equipment.

[0021] Preferably, the hot flow outlet and the first hot flow inlet, the cold flow inlet pipe and the first cold flow inlet, and the outflow pipe and the outlet are all detachably connected.

[0022] Preferably, the hot flow outlet and the first hot flow inlet, the cold flow inlet pipe and the first cold flow inlet, and the outflow pipe and the outlet are all threadedly connected.

[0023] Compared with the prior art, the beneficial effect of the present invention is that after the reduction furnace completes the reduction reaction, cooling water is needed to take away the heat on the furnace shell. The cooling water carrying heat is cooled by circulating water through a heat exchanger. Since the temperature of the circulating water after heat exchange is relatively high, in this application, the high-temperature circulating water is first heat-exchanged and cooled, and then discharged into the temperature regulating interlayer, so that the heating section of the water quenching equipment is surrounded by hot water, thereby achieving the purpose of heat preservation of the water quenching equipment when the furnace is shut down through heat transfer. This not only shortens the heating time of the water quenching equipment when it needs to be used and reduces electricity costs, but also realizes the recovery and utilization of the heat of the reduction furnace and prevents energy waste; when the equipment needs to be shut down for inspection or maintenance, low-temperature water is re-discharged into the temperature regulating interlayer, so that the heating section of the water quenching equipment is surrounded by low-temperature water, which accelerates the cooling of the equipment and improves the utilization rate of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0026] Figure 2 It is a front view of an embodiment of the utility model;

[0027] Figure 3 It is a top view of an embodiment of the present utility model.

[0028] Reference numerals:

[0029] 1. Temperature regulating interlayer; 11. First hot flow inlet; 12. First cold flow inlet; 121. Cold flow inlet pipe; 13. Outlet; 131. Outlet pipe; 14. Water quenching equipment wall; 141. Insulation layer; 15. Silicon material conveying channel wall;

[0030] 2. Reduction furnace;

[0031] 3. Heat exchanger; 31. Second hot flow inlet; 32. Second cold flow inlet; 33. Hot flow outlet; 34. Cold flow outlet;

[0032] 4. Second water pump;

[0033] 5. Water tank; 51. Cold flow chamber; 52. Hot flow chamber; 53. Insulation layer;

[0034] 6. Connecting pipe; 61. First control valve; 62. First water pump;

[0035] 7. Second control valve;

[0036] 8. The third water pump;

[0037] 9. Temperature detector. DETAILED DESCRIPTION

[0038] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are only for the convenience of describing the present invention and simplifying the description, and 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 therefore should not be understood as a limitation on the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0041] In this utility model, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0042] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] like Figures 1-3 As shown, the embodiment of the present invention provides a temperature regulating device for water quenching equipment, comprising:

[0045] The temperature regulating interlayer 1 is provided with a first hot flow inlet 11, a first cold flow inlet 12 and an outlet 13;

[0046] Reduction furnace 2;

[0047] The heat exchanger 3 is provided with a second hot flow inlet 31, a second cold flow inlet 32, a hot flow outlet 33 and a cold flow outlet 34;

[0048] a cold flow inlet pipe 121 connected to the first cold flow inlet 12;

[0049] an outlet pipe 131 connected to the outlet 13;

[0050] The temperature regulating interlayer 1 is located between the water quenching equipment wall 14 and the silicon material conveying channel wall 15 ; the second heat flow inlet 31 is connected to the reduction furnace 2 , and the heat flow outlet 33 is connected to the first heat flow inlet 11 .

[0051] Specifically, the water quenching equipment wall 14 and the silicon material conveying channel wall 15 are both walls of the heating section of the water quenching equipment.

[0052] It should be noted that the reduction furnace 2 is the core equipment in the production of polysilicon. Its principle is to break down the high-purity silicon core with a high voltage of more than 10,000V, and continuously introduce high-purity hydrogen and trichlorosilane into the reduction furnace 2. At about 1100°C, hydrogen reduces high-purity trichlorosilane to generate elemental silicon and deposit it on the surface of the silicon core. The temperature atmosphere of the entire reduction reaction is about 1100°C, which makes the temperature of the reduction furnace 2 shell relatively high. Generally, the heat on the shell is taken away by controlling the water flow, so as to achieve the purpose of stabilizing the temperature of the shell. The heat taken away by the cooling water is cooled by circulating water through heat exchange. The cooling water after heat exchange is sent to the bell jar, chassis, electrode and exhaust gas of the reduction furnace 2 for cooling. Since the temperature of the circulating water after heat exchange is relatively high, in this application, the high-temperature circulating water and the low-temperature water are first heat exchanged through the heat exchanger 3, and the cooled circulating water is passed into the temperature regulating interlayer 1, so that the heat of the reduction furnace 2 is recycled and utilized, effectively avoiding energy waste.

[0053] When the water quenching equipment is shut down and waiting for use, the circulating water in the reduction furnace 2 is exchanged with low-temperature water through the heat exchanger 3, and the circulating water after heat exchange is discharged into the temperature regulating interlayer 1 through the hot flow outlet 33, so that the heating section of the water quenching equipment is surrounded by hot water, thereby achieving the purpose of heat preservation of the water quenching equipment when the furnace is shut down through heat transfer, thereby shortening the heating time of the water quenching equipment when it needs to be used, reducing electricity costs, and after the insulation is completed, the temperature regulating interlayer 1 is discharged through the outlet pipe 131; when the water quenching equipment needs to be shut down for inspection or maintenance, low-temperature water is discharged into the temperature regulating interlayer 1 through the cold flow inlet pipe 121, so that the heating section of the water quenching equipment is surrounded by low-temperature water, accelerating the cooling of the equipment, thereby improving the utilization rate of the equipment.

[0054] Furthermore, it also includes a water tank 5, which includes a cold flow chamber 51 and a hot flow chamber 52; the cold flow chamber 51 is respectively connected to the second cold flow inlet 32 and the cold flow inlet pipe 121, and the hot flow chamber 52 is respectively connected to the cold flow outlet 34 and the outlet pipe 131; the cold flow and hot flow are stored separately by the cold flow chamber 51 and the hot flow chamber 52 to ensure that the temperature of the low-temperature water is not affected.

[0055] It should be noted that, since the temperature of the circulating water in the reduction furnace 2 is relatively high, the water discharged from the cold flow outlet 34 after heat exchange through the heat exchanger 3 is not low-temperature water and needs to be stored in the hot flow chamber 52; after the water quenching equipment completes insulation, the water in the temperature regulating interlayer 1 may be warm water or low-temperature water, so it is directly discharged into the hot flow chamber 52.

[0056] In order to reuse water resources, a connecting pipe 6 is provided between the cold flow chamber 51 and the hot flow chamber 52. The connecting pipe 6 is provided with a first control valve 61 and a first pumping valve 62. When the water temperature in the hot flow chamber 52 drops to a low temperature, the first control valve 61 and the first pumping valve 62 can be opened to discharge the low-temperature water cooled in the hot flow chamber 52 into the cold flow chamber 51.

[0057] In order to prevent the temperature of the low-temperature water from being affected by the hot water, a temperature insulating layer 53 is provided between the cold flow chamber 51 and the hot flow chamber 52 .

[0058] Furthermore, a second water pump 4 is provided on each of the second hot flow inlet 31 and the second cold flow inlet 32 .

[0059] When the water quenching equipment is shut down and waiting for use, the first water pump 4 on the second hot flow inlet 31 and the second cold flow inlet 32 is turned on to pump the circulating water in the reduction furnace 2 and the low-temperature water in the cold flow chamber 51 into the heat exchanger 3 for heat exchange.

[0060] In order to control the flow direction and discharge time of the water flow, a second control valve 7 and a third water pump 8 are provided on the cold flow inlet pipe 121 and the outlet pipe 131 .

[0061] When the water quenching equipment needs to be shut down for inspection or maintenance, the second control valve 7 and the third water pump 8 on the cold flow inlet pipe 121 are opened to pump the low-temperature water in the cold flow chamber 51 into the temperature regulating interlayer 1; when the water in the temperature regulating interlayer 1 needs to be discharged, the second control valve 7 and the third water pump 8 on the outlet pipe 131 are opened to discharge the water into the hot flow chamber 52.

[0062] Furthermore, a temperature detector 9 is provided on the outer side of the wall surface 14 of the water quenching equipment for monitoring the temperature in the temperature regulating interlayer 1 .

[0063] When the water quenching equipment is shut down and waiting for use, if the temperature detector 9 detects that the water temperature in the temperature regulating interlayer 1 is too low and the heat preservation effect cannot be achieved, it can be discharged through the outlet pipe 131 and then re-discharged into the circulating water that has been heated by the heat exchanger 3; when the water quenching equipment needs to be shut down for inspection or maintenance, if the temperature detector 9 detects that the water temperature in the temperature regulating interlayer 1 is too high and the cooling effect cannot be achieved, it can be discharged through the outlet pipe 131 and then re-discharged into low-temperature water.

[0064] In order to enhance the heat preservation effect of the temperature regulating interlayer 1 , a heat preservation layer 141 is provided on the inner side of the wall surface 14 of the water quenching device. The heat preservation layer 141 can perform hot heat preservation and cold heat preservation.

[0065] Furthermore, the hot flow outlet 33 and the first hot flow inlet 11, the cold flow inlet pipe 121 and the first cold flow inlet 12, and the outflow pipe 131 and the outlet 13 are all detachably connected, so that the temperature regulating interlayer 1 can replace the water source to be used.

[0066] Specifically, the hot flow outlet 33 and the first hot flow inlet 11, the cold flow inlet pipe 121 and the first cold flow inlet 12, and the outlet pipe 131 and the outlet 13 are all threadedly connected, ensuring sealing while facilitating installation and disassembly.

[0067] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A temperature regulating device for water quenching equipment, characterized in that: include: A temperature regulating interlayer (1) is provided with a first hot flow inlet (11), a first cold flow inlet (12) and an outlet (13); Reduction furnace (2); A heat exchanger (3), wherein the heat exchanger (3) is provided with a second hot flow inlet (31), a second cold flow inlet (32), a hot flow outlet (33), and a cold flow outlet (34); A cold flow inlet pipe (121) connected to the first cold flow inlet (12); an outlet pipe (131) connected to the outlet (13); The temperature regulating interlayer (1) is located between the wall surface (14) of the water quenching device and the wall (15) of the silicon material conveying channel; the second heat flow inlet (31) is connected to the reduction furnace (2), and the heat flow outlet (33) is connected to the first heat flow inlet (11).

2. The temperature regulating device for water quenching equipment according to claim 1, characterized in that: It also includes a water tank (5), the water tank (5) including a cold flow chamber (51) and a hot flow chamber (52); the cold flow chamber (51) is respectively connected to the second cold flow inlet (32) and the cold flow inlet pipe (121), and the hot flow chamber (52) is respectively connected to the cold flow outlet (34) and the outflow pipe (131).

3. The temperature regulating device for water quenching equipment according to claim 2, characterized in that: A connecting pipe (6) is provided between the cold flow chamber (51) and the hot flow chamber (52), and a first control valve (61) and a first pumping valve (62) are provided on the connecting pipe (6).

4. The temperature regulating device for water quenching equipment according to claim 2, characterized in that: A temperature insulation layer (53) is provided between the cold flow cavity (51) and the hot flow cavity (52).

5. The temperature regulating device for water quenching equipment according to claim 1, characterized in that: A second water pump (4) is provided on each of the second hot flow inlet (31) and the second cold flow inlet (32).

6. The temperature regulating device for water quenching equipment according to claim 1, characterized in that: The cold flow inlet pipe (121) and the outlet pipe (131) are both provided with a second control valve (7) and a third water pump (8).

7. The temperature regulating device for water quenching equipment according to claim 1, characterized in that: A temperature detector (9) is provided on the outside of the wall surface (14) of the water quenching equipment.

8. The temperature regulating device for water quenching equipment according to claim 1, characterized in that: A thermal insulation layer (141) is provided on the inner side of the wall surface (14) of the water quenching equipment.

9. The temperature regulating device for water quenching equipment according to claim 1, characterized in that: The hot flow outlet (33) and the first hot flow inlet (11), the cold flow inlet pipe (121) and the first cold flow inlet (12), and the outflow pipe (131) and the outlet (13) are all detachably connected.

10. The temperature regulating device for water quenching equipment according to claim 9, characterized in that: The hot flow outlet (33) and the first hot flow inlet (11), the cold flow inlet pipe (121) and the first cold flow inlet (12), and the outflow pipe (131) and the outlet (13) are all threadedly connected.

Images