TWM660389U - Exhaust gas purification equipment using high frequency heat source - Google Patents

Abstract

A waste gas purification device using a high frequency heat source includes a heating part. The heating part includes: a reaction furnace; an induction heating tube; a high-frequency coil; a coil protection member; a guide tube, which penetrates the bottom wall of the reaction furnace and extends into the exhaust gas reaction space and is spaced from the top wall of the reaction furnace. The exhaust gas from the upstream is guided to the exhaust gas reaction space by the guide tube. The induction heating tube is arranged between the guide tube and the coil protection member; a catalyst barrel, which is arranged on the guide tube and has a barrel body for accommodating the catalyst and having a plurality of through holes connected to the exhaust gas reaction space; and a scraper mechanism, which has an inner scraper, an outer scraper, and a driving member connecting the inner scraper and the outer scraper and capable of driving the inner scraper and the outer scraper to rotate together.

Description

Exhaust gas purification equipment using high frequency heat source

This new model relates to an exhaust gas purification device, in particular an exhaust gas purification device utilizing a high frequency heat source.

Gases such as nitrous oxide (N ₂ O) are widely used in semiconductor industrial processes, and their concentration can be as high as 99.999%. However, nitrous oxide and carbon dioxide (CO ₂ ) are both greenhouse gases, and the temperature effect caused by nitrous oxide is about 296 times that of carbon dioxide. Therefore, based on the concept of environmental protection and sustainable development of the earth, it is necessary to find ways to reduce the concentration of waste gases such as nitrous oxide (also known as special gases) emitted in industrial manufacturing processes.

Referring to FIG. 1, for example, the Republic of China's new patent No. I827194 discloses an existing exhaust gas filtration device using a high-frequency heat source, which mainly uses a heating part 1 including a reaction furnace 11, an induction heating tube 12, a high-frequency coil 13 and a coil protector 17 to heat the exhaust gas 19. The high-frequency coil 13 uses high-frequency alternating current to generate an induction current in the induction heating tube 12 to heat the induction heating tube 12. However, since the reaction temperature of the exhaust gas 19 is as high as 1050°C, the high-frequency alternating current used by the high-frequency coil 13 has a higher power, resulting in higher energy consumption, so it is necessary to find a solution.

Therefore, the purpose of this new model is to provide a waste gas purification device that utilizes a high-frequency heat source.

Therefore, the new type of waste gas filtration equipment using high-frequency heat source is suitable for treating waste gas and includes a heating part for heating the waste gas. The heating part includes: a reaction furnace, defining a waste gas reaction space for the waste gas to react, and having a bottom wall, a surrounding wall extending upward from the bottom wall, and a top wall covering the top end of the surrounding wall and defining the waste gas reaction space together with the bottom wall and the surrounding wall; an induction heating tube, arranged in the waste gas reaction space of the reaction furnace; a high-frequency coil, spaced from the induction heating tube and wrapped around the outer periphery of the induction heating tube, and used to generate an induction electric field in the induction heating tube. The invention relates to a high frequency coil protection member, which is provided in the exhaust gas reaction space of the reactor and covers the high frequency coil to separate the high frequency coil from the induction heating tube and the exhaust gas to prevent the high frequency coil from being corroded by the exhaust gas; a flow guide pipe, which penetrates the bottom wall of the reactor and extends into the exhaust gas reaction space of the reactor and is connected to the top wall of the reactor. The exhaust gas from the upstream is guided to the exhaust gas reaction space of the reaction furnace by the guide pipe, and the induction heating pipe is concentrically arranged between the guide pipe and the coil protection member; a catalyst barrel is sleeved on the guide pipe and has a barrel body for accommodating the catalyst and provided with a plurality of through holes connected to the exhaust gas reaction space of the reaction furnace. The exhaust gas can enter the barrel body through the through holes and react with the catalyst to reduce the reaction temperature of the exhaust gas, thereby reducing the high cycle The power of the high-frequency alternating current used by the wave coil; and a scraper mechanism, which is used to scrape off the dust or crystals attached to the inner wall surface of the guide tube and the outer wall surface of the barrel body of the catalyst barrel due to the thermal decomposition reaction of the exhaust gas, and has an inner scraper attached to the inner wall surface of the guide tube, an outer scraper attached to the outer wall surface of the barrel body of the catalyst barrel, and a driving member connecting the inner scraper and the outer scraper and capable of driving the inner scraper and the outer scraper to rotate together.

The effects of the present invention are: (1) when the exhaust gas enters the exhaust gas reaction space for heating reaction, the exhaust gas can enter the interior of the barrel through the through holes of the catalyst barrel and react with the catalyst, so that the reaction temperature of the exhaust gas is reduced to about 905°C, thereby reducing the power of the high-frequency alternating current required for the high-frequency coil, thereby achieving the effect of energy saving and extending the service life of the heating part. In addition, the catalyst also helps to crack the special gas in the exhaust gas that is more difficult to handle; (2) when the driving member rotates, the scraper mechanism can scrape off the dust or crystals attached to the inner wall surface of the guide tube and the outer wall surface of the barrel body of the catalyst barrel due to the heating and decomposition reaction of the exhaust gas.

2: Entrance

3: Front water washing section

4: Exhaust gas transmission pipe

5: Heating section

51: Reactor

510: Waste gas reaction space

511: Bottom wall

512:Surrounding Wall

513: Top wall

52: Induction heating tube

53: High frequency coil

54: Insulation unit

541: Atmosphere

542: Ceramic cotton layer

543:Nanofiber blanket or water layer

55: Scraper mechanism

551: Internal scraper

552: External scraper

5521: Vertical scraper bar

5522:Connection ring

553: Driving parts

554: External scraper

57: Coil protector

571: Lower ring plate

572: Inner tube

573: External control

574: Sheung Wan Board

58: Flow guide tube

59: Catalyst barrel

590:Through hole

591: Barrel body

592: Ring-shaped cover

599: Catalyst

6: Back-end water washing section

7: Sink

8: Exhaust section

9: Waste gas

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a device configuration diagram illustrating a heating portion of a prior art exhaust gas purifier utilizing a high frequency heat source disclosed in the Republic of China Patent No. 1827194; FIG. 2 is a device configuration diagram illustrating a first embodiment of the present exhaust gas purifier utilizing a high frequency heat source, including a heating portion for heating the exhaust gas; FIG. 3 is a cross-sectional side view, FIG. 4 is a perspective view illustrating a scraper mechanism of the heating part of the first embodiment; FIG. 5 is a sectional top view illustrating a catalyst barrel of the heating part of the first embodiment; FIG. 6 is a partial sectional side view illustrating a second embodiment of the novel exhaust gas purifying device using a high-frequency heat source having a scraper mechanism of a different type; and FIG. 7 is a perspective view illustrating the scraper mechanism of the second embodiment.

Referring to Figures 2 to 4, a first embodiment of the novel exhaust gas purifying device using a high-frequency heat source is suitable for treating exhaust gas 9 (such as nitrous oxide, etc.). In this first embodiment, the exhaust gas purifying device using a high-frequency heat source includes an inlet 2, a front-end water washing section 3, an exhaust gas pipe 4, a heating section 5, a rear-end water washing section 6, an exhaust section 8, and a water tank 7.

In the first embodiment, the air inlet of the inlet portion 2 is connected to a front-end manufacturing device (not shown), and is used to allow the exhaust gas 9 from the front-end manufacturing device to enter the new exhaust gas filtration device using a high-frequency heat source.

In the first embodiment, the air inlet of the front-stage water washing section 3 is connected to the air outlet of the inlet section 2, and wet washing is used to flush the exhaust gas 9 with clean water to remove dust, water-soluble gases and other components.

Then, the exhaust gas 9 after preliminary washing leaves the front water washing section 3 and enters the exhaust gas delivery pipe 4, and then flows into the heating section 5.

In the first embodiment, the heating part 5 includes a reaction furnace 51, an induction heating tube 52, a high frequency coil 53, a coil protection member 57, a flow guide tube 58, a catalyst barrel 59, a heat insulation unit 54, and a scraper mechanism 55.

As shown in FIG. 3 , in the first embodiment, the reaction furnace 51 has a bottom wall 511, a surrounding wall 512 extending upward from the bottom wall 511, and a top wall 513 covering the top of the surrounding wall 512 and defining an exhaust gas reaction space 510 with the bottom wall 511 and the surrounding wall 512.

In the first embodiment, the induction heating tube 52 is concentrically disposed between the flow tube 58 and the coil protector 57. The induction heating tube 52 is spaced a distance from the flow tube 58 to define the exhaust gas reaction space 510 between the induction heating tube 52 and the flow tube 58. In the first embodiment, the induction heating tube 52 is disposed in the exhaust gas reaction space 510 of the reaction furnace 51, and the material can be graphite, or conductive metal or other conductive materials.

In the first embodiment, the high-frequency coil 53 is spaced from the induction heating tube 52 and is wound around the outer periphery of the induction heating tube 52, and is used to generate an induction current in the induction heating tube 52 to heat the induction heating tube 52, so as to heat the exhaust gas 9 flowing through the exhaust gas reaction space 510. Therefore, since the high-frequency coil 53 generates an induction current for the induction heating tube 52 to heat the induction heating tube 52, the exhaust gas 9 entering the reaction furnace 51 can be heated and decomposed to reduce the concentration.

The coil protection member 57 is disposed in the exhaust gas reaction space 510 and covers the high-frequency coil 53 to separate the high-frequency coil 53 from the induction heating tube 52 and the high-frequency coil 53 from the exhaust gas 9 to prevent the high-frequency coil 53 from being corroded by the exhaust gas 9. In the first embodiment, the material of the coil protection member 57 can be, for example, a high-nickel alloy or ceramic.

In the first embodiment, the coil protection member 57 has a lower ring plate 571, an inner tube 572, an outer tube 573, and an upper ring plate 574. The lower ring plate 571 is disposed on the bottom wall 511 of the reaction furnace 51. The inner tube 572 extends upward from the inner edge of the lower ring plate 571 and blocks the high frequency coil 53 and the induction heating tube 52. The outer tube 573 extends upward from the outer edge of the lower ring plate 571. The upper ring plate 574 is connected to the outer tube 573 and the top of the inner tube 572 in an airtight manner, and together with the lower ring plate 571, the inner tube 572 and the outer tube 573, airtightly encloses the high-frequency coil 53 to isolate the high-frequency coil 53 from the exhaust gas 9, so as to protect the high-frequency coil 53 from being corroded by the exhaust gas 9, thereby extending the service life of the high-frequency coil 53.

The heat insulation unit 54 is coated on the outer surface of the surrounding wall 512 of the reactor 51, and provides heat insulation and heat preservation in the form of an insulation jacket, which can prevent heat from escaping to the outside of the reactor 51 through the surrounding wall 512. In the first embodiment, the heat insulation unit 54 has an air layer 541, a ceramic wool layer 542, and a nanofiber blanket layer 543 arranged from the inside to the outside. However, in a variation of the first embodiment, the nanofiber blanket layer 543 can also be replaced by a water layer 543.

In the first embodiment, the draft tube 58 passes through the bottom wall 511 of the reaction furnace 51, extends into the exhaust gas reaction space 510 of the reaction furnace 51, and is spaced apart from the top wall 513 of the reaction furnace 51, wherein the exhaust gas 9 from upstream can be guided to the exhaust gas reaction space 510 by the draft tube 58.

As shown in FIGS. 3 and 5 , in the first embodiment, the catalyst barrel 59 is sleeved on the flow guide tube 58 and has a barrel body 591 which is generally annular and accommodates the catalyst 599 and is provided with a plurality of through holes 590 connected to the exhaust gas reaction space 510, and an annular upper cover 592 which is detachably provided on the upper opening of the barrel body 591. When a new catalyst 599 needs to be added, the annular upper cover 592 can be opened to pour the reagent particles of the catalyst 599 into the interior of the barrel body 591 from the upper opening of the barrel body 591. In this first embodiment, the catalyst 599 is an organic gas catalytic metal catalyst (PBN), or a fluorine catalyst catalyst (PFC), etc.

Therefore, when the exhaust gas 9 enters the exhaust gas reaction space 510 for heating reaction, the exhaust gas 9 can enter the barrel 591 through the through holes 590 and react with the catalyst 599, so that the reaction temperature of the exhaust gas 9 is reduced to about 905°C, thereby reducing the power of the high-frequency alternating current required by the high-frequency coil 53 to achieve energy saving and extend the service life of the heating part 5. In addition, the catalyst 599 also helps to crack the special gas in the exhaust gas 9 that is more difficult to handle.

As shown in Figures 3 and 4, the scraper mechanism 55 is used to scrape off the dust or crystals attached to the inner wall surface of the guide tube 58 and the outer wall surface of the barrel body 591 of the catalyst barrel 59 due to the thermal decomposition reaction of the exhaust gas 9. In the first embodiment, the scraper mechanism 55 has an inner scraper 551 attached to the inner wall surface of the guide tube 58, an outer scraper 552 attached to the outer wall surface of the barrel body 591 of the catalyst barrel 59, and a driving member 553 connecting the inner scraper 551 and the outer scraper 552 and capable of driving the inner scraper 551 and the outer scraper 552 to rotate together, wherein the driving member 553 can be, for example, a rotary cylinder, etc.

In the first embodiment, the outer scraper 552 has two vertical scraper rods 5521 spaced apart and connected to the driving member 553, and a connecting ring 5522 connected to the lower ends of the vertical scraper rods 5521.

As shown in FIG2 , in the first embodiment, the rear water washing section 6 is disposed downstream of the heating section 5 and is used to wash the product after the thermal decomposition reaction once again and lower its temperature.

In the first embodiment, the exhaust section 8 is disposed downstream of the rear water washing section 6 and is used to reduce the concentration of various components in the gas after being washed by the rear water washing section 6.

In the first embodiment, the water tank 7 is disposed below the heating section 5, the front water washing section 3 and the rear water washing section 6, and is used to receive the waste liquid generated after the front water washing section 3 and the rear water washing section 6 perform wet washing.

Referring to Figures 6 and 7, the second embodiment of the novel exhaust gas purifying device using a high-frequency heat source is different from the first embodiment described above only in that, in the second embodiment, an outer scraping member 554 of the scraper mechanism 55 has a different shape, which is a spiral sheet extending downward from the driving member 553.

In summary, the present invention has at least the following advantages and effects: (a) when the exhaust gas 9 enters the exhaust gas reaction space 510 for heating reaction, the exhaust gas 9 can enter the barrel 591 through the through holes 590 and react with the catalyst 599, thereby reducing the reaction temperature of the exhaust gas 9 to about 905°C, thereby reducing the number of high frequency coils 53 required to be used. The power of high-frequency alternating current can be used to achieve energy saving and extend the service life of the heating unit 5. The catalyst 599 can also help to decompose the special gases in the exhaust gas 9 that are more difficult to handle. (b) The coil protection member 57 can airtightly cover the high-frequency coil 53 to isolate the high-frequency coil 53 from the exhaust gas 9, thus protecting the high-frequency coil 53. The high frequency coil 53 is protected from being corroded by the exhaust gas 9, thereby extending the service life of the high frequency coil 53; (c) the heat insulation unit 54 is formed by the air layer 541, the ceramic wool layer 542, and the nanofiber blanket layer 543 (or the water layer 543) arranged from the inside to the outside, and is coated on the outer surface of the surrounding wall 512 of the reactor 51, and is in the form of a heat insulation sleeve, which can provide excellent The heat insulation effect can prevent heat from escaping to the outside of the reaction furnace 51 through the surrounding wall 512; (d) when the driving member 553 rotates, the scraper mechanism 55 can scrape off the dust or crystals attached to the inner wall surface of the guide tube 58 and the outer wall surface of the barrel body 591 of the catalyst barrel 59 due to the heating and decomposition reaction of the exhaust gas 9; therefore, the purpose of this novel invention can be achieved.

However, the above is only an example of the implementation of this new model, and it cannot be used to limit the scope of the implementation of this new model. All simple equivalent changes and modifications made according to the scope of the patent application of this new model and the content of the patent specification are still within the scope of this new patent.

2: Entrance

3: Front water washing section

4: Exhaust gas transmission pipe

5: Heating section

51: Reactor

53: High frequency coil

55: Scraper mechanism

57: Coil protector

58: Flow guide tube

59: Catalyst barrel

599: Catalyst

6: Back-end water washing section

7: Sink

8: Exhaust section

Claims (10)

A waste gas filtration device using a high-frequency heat source is suitable for treating waste gas and includes a heating part for heating the waste gas. The heating part includes: a reaction furnace, defining a waste gas reaction space for the waste gas to react, and having a bottom wall, a surrounding wall extending upward from the bottom wall, and a top wall covering the top end of the surrounding wall and defining the waste gas reaction space together with the bottom wall and the surrounding wall; an induction heating tube, arranged in the waste gas reaction space of the reaction furnace; a high-frequency coil, spaced apart from the induction heating tube; , and winding around the outer periphery of the induction heating tube, and used to generate an induction current in the induction heating tube to heat the induction heating tube, so as to heat the exhaust gas flowing through the exhaust gas reaction space of the reaction furnace; a coil protection member, arranged in the exhaust gas reaction space of the reaction furnace, and covering the high-frequency coil to separate the high-frequency coil from the induction heating tube, and to separate the high-frequency coil from the exhaust gas, so as to prevent the high-frequency coil from being corroded by the exhaust gas; a flow guide pipe, penetrating the bottom wall of the reaction furnace, and extending to the reaction furnace. The exhaust gas reaction space of the reaction furnace is spaced from the top wall of the reaction furnace, wherein the exhaust gas from the upstream is guided to the exhaust gas reaction space of the reaction furnace by the guide pipe, and the induction heating tube is concentrically arranged between the guide pipe and the coil protection member; a catalyst barrel is sleeved on the guide pipe and has a barrel body for accommodating the catalyst and provided with a plurality of through holes connected to the exhaust gas reaction space of the reaction furnace, and the exhaust gas can enter the barrel body through the through holes and react with the catalyst to reduce the reaction of the exhaust gas. The high-frequency alternating current used by the high-frequency coil is reduced in power by reducing the temperature; and a scraper mechanism is used to scrape off the dust or crystals attached to the inner wall of the guide tube and the outer wall of the barrel of the catalyst barrel due to the thermal decomposition reaction of the exhaust gas, and has an inner scraper attached to the inner wall of the guide tube, an outer scraper attached to the outer wall of the barrel of the catalyst barrel, and a driving member connecting the inner scraper and the outer scraper and capable of driving the inner scraper and the outer scraper to rotate together. As described in claim 1, the exhaust gas filtration equipment using a high-frequency heat source, wherein the coil protection member comprises: a lower ring plate, arranged on the bottom wall of the reactor; an inner tube, extending upward from the inner edge of the lower ring plate, and blocking the high-frequency coil and the induction heating tube; an outer tube, extending upward from the outer edge of the lower ring plate; and an upper ring plate, connected to the outer tube and the top end of the inner tube, and together with the lower ring plate, the inner tube and the outer tube, covering the high-frequency coil to isolate the high-frequency coil from the exhaust gas. As described in claim 1, the exhaust gas purification device using a high-frequency heat source, wherein the heating part further includes a heat insulation unit, which is coated on the outer surface of the surrounding wall of the reactor and blocks heat from escaping to the outside of the reactor through the surrounding wall. As described in claim 1, the exhaust gas purification device using a high-frequency heat source, wherein the material of the coil protector is a high-nickel alloy or ceramic. As described in claim 1, the exhaust gas purification device using a high-frequency heat source, wherein the material of the induction heating tube is graphite or conductive metal. As described in claim 1, the exhaust gas purification equipment using a high-frequency heat source, wherein the catalyst is an organic gas catalytic metal catalyst. As described in claim 1, the exhaust gas purification equipment using a high-frequency heat source, wherein the catalyst is a fluorine-based catalyst. As described in claim 1, the exhaust gas filtration equipment using a high-frequency heat source, wherein the barrel body of the catalyst barrel is generally annular, and the catalyst barrel also has an annular upper cover that is detachably covered on the opening on the barrel body. As described in claim 1, the exhaust gas filtration device using a high-frequency heat source, wherein the outer scraper of the scraper mechanism has two vertical scraper rods spaced apart and connected to the driving member, and a connecting ring connecting the lower ends of the vertical scraper rods. As described in claim 1, the exhaust gas filtration device using a high-frequency heat source, wherein the outer scraping member of the scraper mechanism is in the shape of a spiral sheet extending downward from the driving member.

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