TWI633051B - Vortex-type nano carbon material preparation device - Google Patents

Abstract

An vortex collecting type nano carbon material preparing device comprises a liquid collecting tank, an exhaust passage, an oxygen/acetylene flame nozzle and a curved spoiler. The sump includes an opening. The exhaust passage is disposed above the opening and includes a surrounding wall having a perforated baffle disposed on the side of the surrounding wall. The oxygen/acetylene flame nozzle is disposed above the opening and outside the exhaust passage and faces the apertured baffle. The curved baffle is disposed in the sump and in the exhaust passage, and partially extends above the opening, the concave surface of the curved baffle faces the perforated baffle and defines a bit a curved main baffle and a first main mixing space between the perforated baffles. The vortex-type nano carbon material preparation device of the invention can meet both production and environmental requirements.

Description

Vortex-type nano carbon material preparation device

The invention relates to a nano carbon material preparation device, in particular to an vortex collecting type nano carbon material preparation device.

Existing devices for preparing nano carbon materials are often expensive in equipment and need to be operated under specific operating pressures (such as high pressure) and special atmospheres (such as nitrogen, argon or hydrogen in an oxygen-free environment). The use of a large number of chemicals that are prone to waste water is limited in use.

The Republic of China Patent No. I530452 discloses a method for preparing a nano carbon material which is produced by burning oxygen/acetylene (O ₂ /C ₂ H ₂ ) to produce a carbon-containing combustion flame as a carbon source, thereby avoiding the problems of the above conventional apparatus. Different types of nano carbon materials can be produced. However, the method is mainly batch preparation, and the yield of the nano carbon material obtained in a single time is low; when it is continuously prepared by the water circulation system, although the yield can be improved, there may be a circulation line and a sprinkler head. (Atomizing nozzles) are easy to block and add to the energy required for cycling. In addition, since it requires an atomizing device and a large mixing space (synthesis cavity) that accommodates the combustion flame and the water mist, the overall apparatus is bulky.

Accordingly, it is an object of the present invention to provide a vortex-type nanocarbon material preparation apparatus that overcomes the disadvantages of the prior art described above.

Therefore, the vortex-type nano carbon material preparation device of the present invention comprises a sump, an exhaust passage, an oxygen/acetylene flame nozzle and a curved spoiler. The sump includes an upwardly facing opening. The exhaust passage is disposed above the opening, and the exhaust passage includes a surrounding wall connecting the opening, and one side of the surrounding wall has a perforated baffle disposed on the opening. The oxygen/acetylene flame nozzle is disposed above the opening and outside the exhaust passage and faces the apertured baffle. The curved baffle is disposed in the sump and in the exhaust passage, and partially extends above the opening, the concave surface of the curved baffle faces the perforated baffle and the oxygen/acetylene flame nozzle. And defining a first main mixing space between the curved baffle and the perforated baffle.

The effect of the invention is that the vortex-collecting nano carbon material preparation device can meet the production requirements such as equipment cost, volume and productivity, and reduce the environmental requirements such as pollution and energy conservation.

The contents of the present invention will be described in detail below: Preferably, the vortex-type nano carbon material preparation device further comprises an agitator to generate a disturbance in the sump.

Preferably, the apertured baffle has a plurality of apertures located at a lower edge thereof such that the lower edge of the apertured baffle is jagged.

Preferably, the exhaust passage further includes an upward exhaust port. More preferably, the exhaust passage further includes an exhaust unit disposed at the exhaust port to cause a negative pressure inside the exhaust passage.

Preferably, the vortex-type nano carbon material preparation device further comprises a smoke cover body disposed above the opening and outside the exhaust passage, and defining a hole in the apertured baffle and the oxygen/acetylene flame Pre-mixing space between the nozzles.

Preferably, the exhaust passage further comprises a plurality of baffles extending from the surrounding wall toward the interior thereof, disposed above the curved baffle, and the baffles are alternately arranged in a labyrinth in the vertical direction. The labyrinth structure, the lowermost baffle and the convex surface of the curved baffle jointly define a second main mixing space.

Preferably, the sump further includes a drain opening near the bottom thereof and below the exhaust passage.

1‧‧‧ sump

11‧‧‧ openings

12‧‧‧Draining port

2‧‧‧Exhaust passage

21‧‧‧ Around the wall

210‧‧‧ holes

211‧‧‧ holed baffle

22‧‧‧Exhaust port

23‧‧‧ baffles

24‧‧‧Exhaust unit

3‧‧‧Oxygen/acetylene flame nozzle

4‧‧‧bend spoiler

401‧‧‧ first main mixing space

402‧‧‧Second main mixed space

5‧‧‧Agitator

6‧‧‧Smoke cover

60‧‧‧Premixed space

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a cross-sectional view showing an embodiment of the vortex-type nanocarbon material preparation apparatus of the present invention; [Fig. 2] is a partially enlarged side elevational view of the perforated baffle of the embodiment; [Fig. 3] is a scanning electron microscope image of the nanocarbon material obtained by the preparation of the nano carbon material by the embodiment; Fig. 4 is a transmission electron microscope image of a nanocarbon material obtained by preparing a nanocarbon material by this embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

The present invention will be further illustrated by the following examples, but it should be understood that this embodiment is intended to be illustrative only and not to be construed as limiting.

<Example>

Referring to FIG. 1 and FIG. 2, an embodiment of the vortex-type nano carbon material preparation device of the present invention comprises a liquid collection tank 1, an exhaust passage 2, an oxygen/acetylene flame nozzle 3, and a curved spoiler 4. , a stirrer 5 and a smoke cover body 6.

The sump 1 includes an upwardly facing opening 11 and a discharge port 12 located near the bottom thereof and below the exhaust passage 2.

The exhaust passage 2 is disposed above the opening 11, and the exhaust passage 2 includes a surrounding wall 21 connecting the opening, an upwardly facing exhaust port 22, and a plurality of baffles extending from the surrounding wall 21 toward the interior thereof. The plate 23 and the exhaust unit 24 provided in the exhaust port 22. In this embodiment, the exhaust unit 24 is an exhaust fan such that the inside of the exhaust passage 2 is under negative pressure. One side of the surrounding wall 21 has a perforated baffle 211 disposed on the opening 11. In the present embodiment, the perforated baffle 211 has a plurality of holes 210 at its lower edge such that the lower edge of the perforated baffle 211 is serrated. The baffles 23 are disposed above the curved baffle 4 and are alternately arranged in a labyrinth structure in the vertical direction. The baffles 23 located at the bottom and the convex surfaces of the curved baffles 4 are defined together. A second main mixing space 402 is exited.

The oxygen/acetylene flame nozzle 3 is disposed above the opening 11 and outside the exhaust passage 12 and faces the perforated baffle 211.

The curved baffle 4 is disposed in the sump 1 and in the exhaust passage 2, and partially extends above the opening 11, and the concave surface of the curved baffle 4 faces the A perforated baffle 211 and the oxygen/acetylene flame nozzle 3 define a first main mixing space 401 between the curved baffle 4 and the perforated baffle 211.

In the present embodiment, the agitator 5 is a magnetic stir bar to create a disturbance in the sump 1.

The smoke cover body 6 is disposed above the opening 11 and outside the exhaust passage 2, and defines a pre-mixing space 60 between the perforated baffle 211 and the oxygen/acetylene flame nozzle 3.

<Application example>

Referring to FIG. 1 and FIG. 2, the specific flow of the vortex-type nano carbon material preparing apparatus using the above embodiment is as follows: a filtered liquid is injected into the sump 1 of the above embodiment to make the liquid surface and the holed portion. The lower edge of the baffle 211 is substantially flush (as shown in FIG. 2), and the magnetic stirrer is rotated in the sump 1 by an electromagnetic stirrer to continuously perturb the liquid in the sump 1. Can increase the collection efficiency of subsequent nano carbon materials. In this application example, the liquid is water and its volume in the sump 1 is 2.5L.

Then, the oxygen/acetylene flame is ejected through the oxygen/acetylene flame nozzle 3 toward the water surface in front of the perforated baffle 211 to continuously generate smoke containing carbon particles in the premixing space 60. The premixing space 60 is pre-mixed with water via the disturbance of the agitator and condensed to form a nanocarbon material.

The exhaust fan provided to the exhaust port 22 is rotated to cause a negative pressure inside the exhaust passage 2.

The smoke in the premixing space 60 and the water close to the water surface (both containing nano carbon materials) are guided by the negative pressure inside the exhaust passage 2 through the perforated baffle A plurality of holes 210 of 211 flow to the first main mixing space 401. The smoke and water are accelerated by the reduction of the flow cross-sectional area when passing through the holes 210, and are further decelerated by the holes 210 and the flow cross-sectional area is increased and blocked by the curved baffle plate 4, Therefore, a strong vortex (as indicated by a circular dotted line in the first main mixing space 401 in Fig. 1) is generated in the first main mixing space 401, and the smoke is strongly mixed with water. It is worth mentioning that, in this application example, the holes 210 are triangular with a narrow width and a width (as shown in FIG. 2), which can enhance the uneven disturbance of smoke and water passage, and help to generate eddy currents.

Then, the smoke containing carbon particles not mixed into the water and the water mist generated in the first main mixing space 401 are guided by the exhaust fan to flow through the lowermost baffle 23 due to the flow cross-sectional area. The second main mixing space 402, which is reduced and accelerated, and flows between the lowermost baffle 23 and the convex surface of the curved baffle 4, is further decelerated due to an increase in flow cross-sectional area, A strong eddy current (as indicated by the circular dashed line in the second main mixing space 402 in Fig. 1) is generated in the second main mixing space 402, and the smoke is again strongly mixed with water. The baffles 23 arranged in a labyrinth structure intercept the water mist and reduce the mist from being discharged from the exhaust port 22. Finally, the obtained nano carbon material is collected from the liquid discharge port 12. The liquid discharge port 12 can not only facilitate the removal of the prepared nano carbon material, but also facilitate the cleaning of the vortex-type nano carbon material preparation device.

In the above process of preparing the nanocarbon material, the water surface in the sump 1 is maintained substantially flush with the lower edge of the perforated baffle 211 (as shown in Fig. 2).

In Application Example 1, the flow rates of oxygen and acetylene were 1.0 L/min and 2.5 L/min, respectively; in Application Example 2, the flow rates of oxygen and acetylene were 0.5 L/min and 2.5 L/min, respectively. Application Example 1 and Application Example 2 Nano carbon materials prepared with process time The concentrations are shown in Table 1 below. The results in Table 1 show that the vortex-type nano carbon material preparation apparatus of the present invention can rapidly produce a nano carbon material having a concentration of about 0.020 to 0.055 wt%.

The nano carbon material prepared in Application Example 1 (process time: 3 min) is shown in Fig. 3 (A) and Fig. 4 (A); the nano carbon material obtained in Application Example 2 (process time is 3 min) Figure 3 (B) and Figure 4 (B). The results of Figs. 3 and 4 show that the vortex-type nano carbon material producing apparatus of the present invention can rapidly produce a granular or spherical nano carbon material. Further, by adjusting the flow ratio of oxygen to acetylene, the vortex-type nano carbon material preparation apparatus of the present invention can also produce a sheet-like nanocarbon material.

In summary, the vortex-type nano carbon material preparation device of the invention can not only meet the requirements of low equipment cost, no specific operating environment, no need to use a large amount of chemicals, and can have both small equipment volume and high productivity. The advantages of the process are simple, energy-saving, and no problem of circulation pipe blockage, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

Claims (7)

An vortex collecting type nano carbon material preparing device comprises: a collecting tank comprising an upward opening; an exhaust passage disposed above the opening, the exhaust passage comprising a surrounding wall connecting the opening, the exhaust passage a perforated baffle disposed on the side of the wall; an oxygen/acetylene flame nozzle disposed above the opening and outside the exhaust passage and facing the perforated baffle; and a curved choke a plate disposed in the sump and in the exhaust passage, and partially extending above the opening, the concave surface of the curved baffle facing the perforated baffle and the oxygen/acetylene flame nozzle, and defining a a first main mixing space between the curved baffle and the perforated baffle, wherein the exhaust passage further comprises a plurality of baffles extending from the surrounding wall toward the inner portion thereof, Above the type of baffles, the baffles are alternately arranged in a labyrinth structure in the vertical direction, and the baffles located at the bottom and the convex surfaces of the curved baffles collectively define a second main mixing space. The vortex-type nanocarbon material producing apparatus according to claim 1, further comprising a stirrer to generate a disturbance in the sump. The vortex-type nanocarbon material producing apparatus according to claim 1, wherein the perforated baffle has a plurality of holes at a lower edge thereof such that a lower edge of the perforated baffle is serrated. The vortex-type nano carbon material producing apparatus of claim 1, wherein the exhaust passage further comprises an upward exhaust port. The vortex-type nano carbon material preparation device of claim 4, wherein the exhaust passage further comprises an exhaust unit disposed at the exhaust port to cause a negative pressure inside the exhaust passage. The vortex-type nano carbon material preparation device according to claim 1, further comprising a smoke cover body disposed above the opening and outside the exhaust passage, and defining a hole in the perforated baffle and the oxygen / Premixing space between the acetylene flame nozzles. The vortex-type nano carbon material preparation device according to claim 1, wherein the sump further comprises a liquid discharge port located near the bottom portion thereof and located below the exhaust passage.