Spraying channel type cooling system for gas phase method nano material production

Abstract

The invention belongs to the technical field of gas phase method nano powder material production, and provides a channel type cooling system for gas phase method nano material production, which comprises a gas inlet cylinder and a distribution cylinder, the gas inlet cylinder is arranged at the top of the reaction furnace, a communicating hole is formed in the bottom end of the gas inlet cylinder, a connecting hole is formed in the top end of the gas inlet cylinder, the end of the burner sequentially penetrates through the connecting hole and the communicating hole to extend into the reaction furnace, and a gas inlet pipe is arranged on the side wall of the gas inlet cylinder. The distribution cylinder is arranged in the air inlet cylinder, the distribution cylinder comprises a first mesh plate, a silk screen and a second mesh plate which are sequentially arranged from inside to outside in a sleeving mode, the first mesh plate is arranged on the outer side of the burner in a sleeving mode, and the aperture of the first mesh plate is larger than that of the second mesh plate. In the system, after entering the gas inlet cylinder, cooling gas is subjected to gas flow acceleration through the second mesh plate, then enters the silk screen to be uniformly distributed, and finally slowly and uniformly cools the side wall of the burner through the first mesh plate. The cooling effect is good, airflow enters the reaction furnace more stably, the flame of the reactor is stable and free of influence, and the reaction process is free of interference.

Description

Technical Field

[0001] The invention belongs to the technical field of gas phase method nano powder material production, and in particular relates to a tunnel type cooling system used for gas phase method nano material production. Background Art

[0002] As an important functional nano powder material, gas phase nano powder materials (aluminum oxide, silicon oxide, titanium oxide) are widely used in powder coatings, thermal insulation materials, ceramics, new energy materials and other fields. In the production of gas phase nano materials, raw materials such as chlorosilane undergo high-temperature hydrolysis reaction in a hydrogen-oxygen flame, and then synthesize nano particle materials. However, the hydrogen-oxygen flame has high energy density and high temperature, and the reactor burner is prone to high temperature deformation, resulting in equipment damage. For this reason, it is necessary to design cooling equipment to cool the burner.

[0003] The traditional method is to add an air inlet cylinder outside the burner, and then provide cooling air into the air inlet cylinder to cool the side wall of the burner. Figure 1 As shown, the cooling gas directly enters the air inlet tube to cool the side wall of the burner, and then enters the reaction furnace below.

[0004] However, directly introducing cooling air to cool the side wall of the burner will result in uneven cooling effect, which will lead to poor cooling effect in some areas of the burner. In addition, due to the negative pressure in the furnace system, the cooling air will easily cause the flame to deviate and fluctuate, which will eventually affect the product quality. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a tunnel cooling system for the production of nanomaterials by gas phase method, which solves the problems of uneven burner cooling and flame swing, ensures the stability of synthetic flame, uniform product particle size and stable quality.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a tunnel cooling system for producing nanomaterials by gas phase method, comprising an air inlet cylinder and a distribution cylinder; The air inlet cylinder is arranged on the top of the reaction furnace, the top of the reaction furnace is open, the bottom of the air inlet cylinder is provided with a connecting hole connected to the reaction furnace, the top of the air inlet cylinder is provided with a connecting hole adapted to the burner, the end of the burner sequentially passes through the connecting hole and the connecting hole and extends into the reaction furnace, and an air inlet pipe is provided on the side wall of the air inlet cylinder; The distribution tube is arranged in the air inlet tube, and the distribution tube includes a first mesh plate, a wire mesh, and a second mesh plate which are sequentially sleeved from the inside to the outside. The first mesh plate is sleeved on the outside of the burner, and the aperture of the first mesh plate is larger than that of the second mesh plate.

[0007] Preferably, a semicircular tube distributor is provided in the air intake cylinder, the semicircular tube distributor is sleeved on the outside of the second mesh plate, and the semicircular tube distributor is connected to the air intake pipe. Preferably, an observation port is provided on the side wall of the air intake cylinder.

[0008] Preferably, the system further comprises a cooling device, wherein the cooling device is connected to the air intake pipe and is used for providing cooling air.

[0009] Preferably, the system further comprises an observation tube, wherein the observation tube comprises a transparent cylinder and a partition plate arranged in the cylinder; The partition plate divides the interior of the cylinder into an upper and lower cavity, and a vent hole is provided through the partition plate, and the upper cavity is connected with the lower cavity through the vent hole; The top end of the cylinder is provided with an air inlet, which is communicated with the cooling device; a spiral blade is rotatably provided in the upper cavity; the bottom end of the cylinder is provided with an air outlet, which is communicated with the air inlet pipe.

[0010] Preferably, the system further comprises an adjustment plate, a baffle, and a rotating rod; The adjustment plate is arranged in the lower cavity, the adjustment plate divides the interior of the lower cavity into two parts, an upper part and a lower part, and an adjustment hole is penetrated through the adjustment plate; A rotating hole is provided at the bottom end of the cylinder, the top end of the rotating rod passes through the rotating hole and extends into the lower cavity, the baffle is coaxially fixed with the rotating rod, the top end of the baffle is in sliding contact with the bottom end of the adjustment plate, and the rotating rod is rotatably connected to the rotating hole through a bearing.

[0011] Preferably, a semicircular adjustment area is provided on the adjustment plate, and the adjustment holes are distributed in the semicircular adjustment area.

[0012] Preferably, the baffle is adapted to the semicircular adjustment area.

[0013] Preferably, a rotating disk is provided at the bottom end of the rotating rod.

[0014] Preferably, the rotating disk is coaxial with the rotating rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a tunnel cooling system for the production of nanomaterials by gas phase method, wherein after the cooling gas enters the air inlet, it first passes through the second mesh plate to accelerate the airflow, then enters the wire mesh, the wire mesh can evenly distribute the gas, and finally passes through the first mesh plate to decelerate the airflow, thereby slowly and evenly cooling the side wall of the burner. Not only is the cooling effect better, the airflow enters the reactor more smoothly, so that the reactor flame is stable and unaffected, the reaction process is not disturbed, the original particle size of the synthesized powder material is more uniform, and the product quality is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of the prior art; Figure 2 One of the cross-sectional schematic diagrams of a tunnel cooling system for producing nanomaterials by a gas phase method provided in an embodiment of the present invention; Figure 3 A schematic diagram of the three-dimensional structure of a tunnel cooling system for producing nanomaterials by a gas phase method provided in an embodiment of the present invention; Figure 4 A second cross-sectional schematic diagram of a tunnel cooling system for producing nanomaterials by a gas phase method provided in an embodiment of the present invention; Figure 5 A schematic cross-sectional view of an observation tube of a tunnel-type cooling system for producing nanomaterials by a gas phase method provided by an embodiment of the present invention; Figure 6 A schematic diagram of the three-dimensional structure of a partition plate of a tunnel-type cooling system for producing nanomaterials by a gas phase method provided by an embodiment of the present invention; Figure 7 A schematic diagram of a top view of a regulating plate of a tunnel-type cooling system for producing nanomaterials by a gas phase method provided in an embodiment of the present invention; Figure 8 A schematic diagram of the top view of the structure of a baffle of a tunnel-type cooling system for producing nanomaterials by a gas phase method provided in an embodiment of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Air intake pipe; 2. Burner; 3. The second mesh plate; 4. Silk screen; 5. The first mesh plate; 6. Observation tube; 60. Spiral blade; 61. Cylinder; 62. Air outlet; 63. Air inlet; 64. Partition plate; 65. Air vent; 66. Adjustment plate; 67. Baffle; 68. Rotating rod; 69. Adjustment hole; 7. Reactor; 8. Connecting hole; 9. Intake pipe; 10. Semicircular pipe distributor. DETAILED DESCRIPTION

[0018] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0019] Example 1 The present embodiment provides a tunnel-type cooling system for producing nanomaterials by a gas phase method, comprising an air inlet cylinder 1 and a distribution cylinder.

[0020] Among them, the air intake cylinder 1 is arranged on the top of the reaction furnace 7, the top of the reaction furnace 7 is open, and a connecting hole 8 connected to the reaction furnace 7 is opened at the bottom of the air intake cylinder 1. A connecting hole adapted to the burner 2 is provided at the top of the air intake cylinder 1. The end of the burner 2 passes through the connecting hole and the connecting hole 8 in turn and extends into the reaction furnace 7. An air intake pipe 9 is provided on the side wall of the air intake cylinder 1.

[0021] For example, see Figure 2 The bottom end of the burner 2 passes through the connecting hole and the connecting hole 8 in sequence and extends into the reactor 7, and the bottom end of the burner 2 emits flames downward. The burner 2 and the connecting hole are sealed, and the diameter of the burner 2 is smaller than the diameter of the connecting hole 8, that is, there is a gap between the outer wall of the burner 2 and the inner wall of the connecting hole 8. The air intake pipe 9 is connected to the air intake cylinder 1, and the cooling air can enter the air intake cylinder 1 through the air intake pipe 9, and then enter the reactor 7 through the gap between the connecting hole 8 and the burner 2.

[0022] The distribution tube is arranged in the air inlet tube 1, and the distribution tube includes a first mesh plate 5, a screen 4, and a second mesh plate 3 which are sequentially sleeved from the inside to the outside. The first mesh plate 5 is sleeved on the outside of the burner 2, and the aperture of the first mesh plate 5 is larger than that of the second mesh plate 3.

[0023] For example, see Figure 2 The first mesh plate 5, the screen 4, and the second mesh plate 3 are all cylindrical structures with openings at both ends. The first mesh plate 5 and the second mesh plate 3 are both provided with a plurality of mesh holes on their side walls, and the mesh size of the first mesh plate 5 is larger than the mesh size of the second mesh plate 3, so that the flow rate of the gas passing through the first mesh plate 5 is lower than the flow rate of the gas passing through the second mesh plate 3.

[0024] The first mesh plate 5, the wire screen 4, and the second mesh plate 3 are all arranged in the air intake cylinder 1. The first mesh plate 5, the wire screen 4, the second mesh plate 3, and the burner 2 are all coaxially arranged. The first mesh plate 5 is sleeved on the outside of the burner 2, and the diameter of the first mesh plate 5 is larger than the diameter of the connecting hole 8. There is a gap between the first mesh plate 5 and the burner 2. The wire screen 4 is sleeved on the outside of the first mesh plate 5, and the second mesh plate 3 is sleeved on the outside of the wire screen 4. At the same time, the top ends of the first mesh plate 5, the wire screen 4, and the second mesh plate 3 extend to the top of the air intake cylinder 1, and the bottom ends of the first mesh plate 5, the wire screen 4, and the second mesh plate 3 extend to the bottom of the air intake cylinder 1. In this way, if the cooling gas wants to enter the connecting hole 8, it needs to pass through the second mesh plate 3, the wire screen 4, and the first mesh plate 5 in sequence to reach the outer wall of the burner 2, and finally enter the connecting hole 8.

[0025] Based on the above structure, the tunnel type cooling system provided in this embodiment, wherein, after the cooling air enters the air inlet cylinder 1, it will first pass through the second mesh plate 3 to accelerate the airflow, then enter the wire mesh 4, the wire mesh can evenly distribute the gas, and finally pass through the first mesh plate 5 to decelerate the airflow, thereby slowly and evenly cooling the side wall of the burner 2. Not only is the cooling effect better, but the airflow enters the reaction furnace 7 more smoothly, so that the reactor flame is stable and unaffected, the reaction process is not disturbed, the original particle size of the synthesized powder material is more uniform, and the product quality is higher.

[0026] On the basis of the above technical solution, in order to make the cooling air evenly distributed in the air intake cylinder 1, a semicircular tube distributor 10 can be provided in the air intake cylinder 1. The semicircular tube distributor 10 is sleeved on the outside of the second mesh plate 3 and is connected to the air intake pipe 9. For example, see Figure 2 Two air intake pipes 9 are provided on the side wall of the air intake cylinder 1, and the two air intake pipes 9 are symmetrically arranged. Correspondingly, two semicircular tube distributors 10 are provided in the air intake cylinder 1, and the two semicircular tube distributors 10 are spliced ​​to form an annular structure, which is coaxially sleeved on the outside of the second mesh plate 3.

[0027] The bottom end of the semicircular tube distributor 10 is provided with multiple outlets, and the cooling air in the air intake pipe 9 can enter the air intake cylinder 1 through the outlets of the semicircular tube distributor 10. That is, the cooling air in the two air intake pipes 9 can be evenly distributed to the outside of the second mesh plate 3 through the two semicircular tube distributors 10. In addition, the more the number of air intake pipes 9, the more evenly the cooling air is distributed in the air intake cylinder 1.

[0028] On the basis of the above technical solution, an observation port may be provided on the side wall of the air inlet cylinder 1. The internal situation can be observed through the observation port.

[0029] On the basis of the above technical solution, the tunnel type cooling system provided in this embodiment further includes a cooling device, which is connected to the air intake pipe 9 and is used to provide cooling air.

[0030] Among them, the cooling equipment is existing technology, such as air conditioners, air coolers, etc.

[0031] Example 2 On the basis of Example 1, the tunnel type cooling system provided in this example further includes an observation tube 6 , which includes a transparent cylinder 61 and a partition plate 64 disposed inside the cylinder 61 .

[0032] The partition plate 64 divides the interior of the cylinder 61 into an upper and lower cavity, and a vent hole 65 is provided through the partition plate 64, and the upper cavity and the lower cavity are connected through the vent hole 65. The top of the cylinder 61 is provided with an air inlet 63, and the air inlet 63 is connected to the cooling device. A spiral blade 60 is rotatably provided in the upper cavity, and an air outlet 62 is provided at the bottom of the cylinder 61, and the air outlet 62 is connected to the air inlet pipe 9.

[0033] For example, see Figure 3-5 , two air inlet pipes 9 correspond to two observation tubes 6. A partition plate 64 is fixed on the inner wall of the cylinder 61, and the outer edge of the partition plate 64 is sealed and connected to the inner wall of the cylinder 61. The partition plate 64 is provided with three ventilation holes 65 from top to bottom, see Figure 6 , so that the cooling air above the partition plate 64 can only enter the bottom of the partition plate 64 through the vent holes 65.

[0034] At the same time, a rotating shaft is fixed in the upper cavity, and a spiral blade 60 is rotatably sleeved outside the rotating shaft. The spiral blade 60 is located above the vent hole 65, so that when the gas in the upper cavity enters the lower cavity through the vent hole 65, the spiral blade 60 can be driven to rotate. Moreover, the greater the cooling gas flow rate, the faster the spiral blade 60 rotates.

[0035] Furthermore, since the cylinder 61 is made of a transparent material, the staff can directly observe the rotation of the internal spiral blades 60 from the outside, thereby determining whether the cooling air is supplied normally.

[0036] For example, when the cooling device provides cooling air, the spiral blade 60 always keeps rotating stably, which means that the cooling device is stably providing cooling air and the system has a good sealing effect. When the spiral blade 60 rotates slowly, it means that the power of the cooling device is reduced or there is a leak in the system. The staff can immediately check to ensure the stable operation of the system.

[0037] Example 3 On the basis of Example 2, the tunnel type cooling system provided in this example further includes an adjustment plate 66 , a baffle 67 , and a rotating rod 68 .

[0038] The adjustment plate 66 is disposed in the lower cavity, and the adjustment plate 66 divides the interior of the lower cavity into two parts, an upper part and a lower part. An adjustment hole 69 is penetrated through the adjustment plate 66 .

[0039] For example, see Figure 5 An adjustment plate 66 is fixed on the inner wall of the lower cavity, and the outer edge of the adjustment plate 66 is sealedly connected to the inner wall of the cylinder 61 , so that the cooling air above the adjustment plate 66 can only enter the lower part of the adjustment plate 66 through the adjustment hole 69 .

[0040] A rotating hole is provided at the bottom end of the cylinder 61, and the top end of the rotating rod 68 extends into the lower cavity through the rotating hole. The baffle 67 is coaxially fixed with the rotating rod 68, and the top end of the baffle 67 is in sliding contact with the bottom end of the adjustment plate 66. The rotating rod 68 is rotatably connected to the rotating hole through a bearing.

[0041] For example, see Figure 5 The baffle plate 67 is located below the adjustment plate 66 , so that the baffle plate 67 can cover the adjustment hole 69 .

[0042] At the same time, by rotating the rotating rod 68, the baffle 67 can be driven to rotate, and then the position of the baffle 67 can be adjusted, that is, the number of the adjustment holes 69 blocked by the baffle 67 can be adjusted, and then the cooling gas flow rate in the lower cavity can be adjusted. For example, when the number of the adjustment holes 69 blocked is more, the total gas channel area is smaller, and the flow rate is greater. Conversely, when the number of the adjustment holes 69 blocked is less, the total gas channel area is larger, and the flow rate is smaller.

[0043] That is to say, by rotating the rotating rod 68, the cooling air flow rate in the lower cavity can be adjusted, and compared with the adjustment function of the traditional cooling equipment, the channel cooling system provided by this embodiment has higher adjustment accuracy.

[0044] In this embodiment, a semicircular adjustment area is provided on the adjustment plate 66, and the adjustment holes 69 are distributed in the semicircular adjustment area.

[0045] For example, see Figure 7 The left area on the adjustment plate 66 is a semicircular adjustment area, and a plurality of adjustment holes 69 are distributed in a matrix in the semicircular adjustment area.

[0046] The baffle 67 is adapted to the semicircular adjustment area.

[0047] For example, see Figure 8 The baffle 67 is a semicircular structure. By rotating the rotating rod 68, the baffle 67 overlaps with the semicircular adjustment area, so that the baffle 67 can completely cover all the adjustment holes 69, and the gas flow rate is the maximum at this time. Otherwise, the gas flow rate is the minimum.

[0048] In this embodiment, a rotating disk is provided at the bottom end of the rotating rod 68. The rotating disk is coaxial with the rotating rod 68.

[0049] It is convenient for the staff to manually rotate the rotating rod 68. Moreover, the cylinder 61 is made of transparent material, so the staff can directly observe the internal situation, and it is easier to adjust the baffle 67. At the same time, according to the change in the rotation speed of the spiral blade 60, the size of the gas flow rate can be preliminarily judged, which is convenient for the staff to adjust the rotating rod 68.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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 application.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A tunnel cooling system for gas phase nanomaterial production, characterized in that: It comprises an air intake cylinder (1) and a distribution cylinder; The air inlet cylinder (1) is arranged at the top of the reaction furnace (7), a connecting hole (8) is provided at the bottom of the air inlet cylinder (1), the top of the reaction furnace (7) is open, a connecting hole matching the burner (2) is provided at the top of the air inlet cylinder (1), the end of the burner (2) passes through the connecting hole and the connecting hole (8) in sequence and extends into the reaction furnace (7), and an air inlet pipe (9) is provided on the side wall of the air inlet cylinder (1); The distribution tube is arranged in the air inlet tube (1), and comprises a first mesh plate (5), a wire screen (4), and a second mesh plate (3) which are sequentially sleeved from the inside to the outside, the first mesh plate (5) being sleeved on the outside of the burner (2), and the aperture of the first mesh plate (5) being larger than that of the second mesh plate (3).

2. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 1, characterized in that: A semicircular tube distributor (10) is provided inside the air intake cylinder (1), the semicircular tube distributor (10) is sleeved on the outside of the second mesh plate (3), and the semicircular tube distributor (10) is connected to the air intake pipe (9).

3. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 1, characterized in that: An observation port is provided on the side wall of the air intake cylinder (1).

4. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 1, characterized in that: The system further comprises a cooling device, the cooling device being in communication with the air intake pipe (9), and the cooling device being used for providing cooling air.

5. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 4, characterized in that: The system further comprises an observation tube (6), wherein the observation tube (6) comprises a transparent tube body (61) and a partition plate (64) arranged inside the tube body (61); The partition plate (64) divides the interior of the cylinder (61) into upper and lower cavities, and a vent hole (65) is provided through the partition plate (64); An air inlet (63) is provided at the top end of the cylinder (61), and the air inlet (63) is communicated with the cooling device. A spiral blade (60) is rotatably provided in the upper cavity. An air outlet (62) is provided at the bottom end of the cylinder (61), and the air outlet (62) is communicated with the air inlet pipe (9).

6. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 5, characterized in that: The system further comprises an adjustment plate (66), a baffle (67), and a rotating rod (68); The adjustment plate (66) is arranged in the lower cavity, the adjustment plate (66) divides the interior of the lower cavity into two parts, an upper part and a lower part, and an adjustment hole (69) is formed through the adjustment plate (66); A rotation hole is provided at the bottom end of the cylinder (61), and the top end of the rotation rod (68) passes through the rotation hole and extends into the lower cavity. The baffle plate (67) is coaxially fixed with the rotation rod (68), the top end of the baffle plate (67) is in sliding contact with the bottom end of the adjustment plate (66), and the rotation rod (68) is rotationally connected to the rotation hole via a bearing.

7. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 6, characterized in that: The adjustment plate (66) is provided with a semicircular adjustment area, and the adjustment holes (69) are distributed in the semicircular adjustment area.

8. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 7, characterized in that: The baffle (67) is adapted to the semicircular adjustment area.

9. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 6, characterized in that: A rotating disk is provided at the bottom end of the rotating rod (68).

10. The tunnel cooling system for producing nanomaterials by gas phase method according to claim 9, characterized in that: The rotating disk is coaxial with the rotating rod (68).

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