Pneumatic scraper assembly and process waste gas treatment system

Abstract

The utility model discloses a pneumatic scraper assembly and a process waste gas treatment system, belongs to the technical field of waste gas treatment, and solves the problems of blockage caused by dust accumulation in a gas inlet cavity and poor nitrogen purging dust removal effect in the prior art. The pneumatic scraper assembly comprises an air blowing flange, a rotating blade and a cavity scraper which are arranged in an air inlet cavity, the cavity scraper is arranged on the rotating blade and is in contact with the inner wall of the air inlet cavity; and an air outlet of the blowing flange faces the rotating blade and is used for blowing the rotating blade to rotate around a central shaft of the air inlet cavity. The device can be used for process waste gas treatment.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and particularly relates to a pneumatic scraper assembly and a process waste gas treatment system. Background Art

[0002] The solar waste gas treatment process mainly treats a large amount of silane gas. After combustion and oxidation of silane, a large amount of silicon dioxide dust will be generated. These dusts will accumulate on the inner wall of the intake cavity, causing the intake cavity to be blocked, resulting in a fault shutdown.

[0003] In order to reduce the accumulation of dust, tangential nitrogen purging is usually carried out into the intake cavity, and the accumulated dust is cleaned by high-speed air flow. However, after long-term operation, the dust accumulates into blocks, resulting in the air flow being unable to effectively clean it, thus causing equipment blockage failure. Summary of the Utility Model

[0004] In view of the above analysis, the utility model aims to provide a pneumatic scraper assembly and a process waste gas treatment system, which solve the problems of blockage caused by dust accumulation in the intake cavity and poor dust removal effect of nitrogen purging in the prior art.

[0005] The purpose of the utility model is mainly achieved by the following technical solutions:

[0006] The utility model provides a pneumatic scraper assembly for dust removal in the intake cavity of a process waste gas treatment system. The pneumatic scraper assembly includes a blowing flange, a rotating blade and a cavity scraper arranged in the intake cavity; the cavity scraper is arranged on the rotating blade and contacts the inner wall of the intake cavity; the air outlet of the blowing flange faces the rotating blade and is used for blowing the rotating blade to rotate around the central axis of the intake cavity.

[0007] Further, the pneumatic scraper assembly further includes a mounting member, and the rotating blade is rotatably connected to the top of the intake cavity through the mounting member.

[0008] Further, the mounting member includes a fixing plate, a fixing ring and a rotating bearing. The fixing plate is fixedly connected to the top of the intake cavity. The fixing ring is located below the fixing plate and fixedly connected to the fixing plate. The rotating bearing is sleeved on the outer wall of the fixing ring, and one end of the rotating blade is hung on the outer ring of the rotating bearing.

[0009] Further, the rotating blade contacts the lower surface of the fixing plate.

[0010] Further, a support plate is provided at one end of the rotating blade. The support plate extends between the rotating bearing and the fixing plate. A groove is formed on the side of the support plate facing the rotating bearing, and the outer ring of the rotating bearing is inserted into the groove.

[0011] Further, the fixing plate is located between the top wall of the intake cavity and the blowing flange.

[0012] Further, the above pneumatic scraper assembly further includes a torch head scraper. The plasma torch head of the process waste gas treatment system is located within the annular region of the fixed ring. One end of the torch head scraper is fixedly connected to the outer ring of the rotating bearing, and the other end of the torch head scraper is in contact with the plasma torch head.

[0013] Further, the cavity scraper extends into the reaction chamber and is in contact with part or all of the inner wall of the reaction chamber.

[0014] Further, the inner diameter of the reaction chamber is greater than or equal to the inner diameter of the intake chamber, and the dust scraping surface of the cavity scraper is conformal with the inner wall of the intake chamber and part or all of the inner wall of the reaction chamber.

[0015] The present utility model also provides a process waste gas treatment system, which includes a pneumatic scraper assembly, an intake chamber, a reaction chamber, and a water tank that are sequentially connected along the flow direction of the process waste gas. The pneumatic scraper assembly is the above pneumatic scraper assembly.

[0016] Compared with the prior art, the present utility model can at least achieve one of the following beneficial effects:

[0017] The pneumatic scraper assembly provided by the present utility model, without changing the structure of the original process waste gas treatment system, sets a cavity scraper specifically for cleaning the inner wall of the intake chamber in the intake chamber, uses mechanical contact to clean the dust on the inner wall of the intake chamber, and through continuous spraying of the blowing flange, without additional electronic control, can keep the cavity scraper rotating continuously, realize timely cleaning of the dust, and basically will not accumulate and caking, thereby ensuring the continuous operation of the process waste gas treatment system.

[0018] Other features and advantages of the present utility model will be described in the following specification, and part of them will be obvious from the specification, or can be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures specifically pointed out in the written specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are only for the purpose of showing specific embodiments and are not considered as limiting the present utility model. Throughout the drawings, the same reference signs represent the same components.

[0020] Figure 1 It is a schematic structural diagram of the pneumatic scraper assembly provided in Embodiment 1 of the present utility model;

[0021] Figure 2 It is a front view of the pneumatic scraper assembly provided in Embodiment 1 of the present utility model;

[0022] Figure 3 It is a partial structural schematic diagram of the process waste gas treatment system provided in Embodiment 2 of the present utility model.

[0023] Reference numerals:

[0024] 1 - Blowing flange; 2 - Rotating blade; 3 - Cavity scraper; 4 - Fixed plate; 5 - Fixed ring; 6 - Rotating bearing; 7 - Support plate; 8 - Torch head scraper; 9 - Inlet pipe; 10 - Inlet cavity; 11 - Plasma torch head. Detailed implementation manners

[0025] The following will specifically describe the preferred embodiments of the present invention in conjunction with the accompanying drawings, wherein the accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention.

[0026] Embodiment 1

[0027] This embodiment provides a pneumatic scraper assembly for dust removal in the inlet cavity 10 of a process waste gas treatment system. Refer to Figures 1 to 2 , which includes a blowing flange 1, a rotating blade 2 and a cavity scraper 3 arranged in the inlet cavity 10. The cavity scraper 3 is arranged on the rotating blade 2 and contacts the inner wall of the inlet cavity 10. The cavity scraper 3 can be arranged along the radial direction of the inlet cavity 10 or inclined relative to the radial direction of the inlet cavity 10. The air outlet of the blowing flange 1 faces the rotating blade 2 and is used to blow the rotating blade 2 to rotate around the central axis of the inlet cavity 10. The rotating blade 2 and the scraper blade are integrally formed.

[0028] During implementation, gas is introduced into the blowing flange 1, and the gas flow blows into the inlet cavity 10. The blowing flange 1 sprays gas onto the rotating blade 2. Under the action of the air flow, the rotating blade 2 rotates and drives the cavity scraper 3 to move relative to the inner wall of the inlet cavity 10, thereby scraping the dust accumulated inside the inlet cavity 10. The scraped dust directly falls into the water tank.

[0029] Compared with the prior art, the pneumatic scraper assembly provided in this embodiment, without changing the structure of the original process waste gas treatment system, sets a cavity scraper 3 specifically for cleaning the inner wall of the inlet cavity 10 in the inlet cavity 10, and uses the mechanical contact method to clean the dust on the inner wall of the inlet cavity 10. And through the continuous spraying of the blowing flange 1, without additional electronic control, the continuous rotation operation of the cavity scraper 3 can be maintained, the dust can be cleaned in time, and basically no accumulation and caking will occur, thereby ensuring the continuous operation of the process waste gas treatment system.

[0030] For the air outlet direction of the blowing flange 1 and the setting direction of the rotating blade 2, the following methods can be adopted:

[0031] In one method, the rotating blade 2 is arranged along the vertical direction and the radial direction of the inlet cavity 10, and the air outlet direction of the blowing flange 1 is not zero relative to the radial direction of the inlet cavity 10. That is to say, the air outlet direction of the blowing flange 1 is inclined relative to the radial direction of the inlet cavity 10.

[0032] In another way, the air outlet direction of the blowing flange 1 is inclined along the radial direction of the intake cavity 10, and the rotating blade 2 is inclined with respect to both the radial and vertical directions of the intake cavity 10.

[0033] In order to improve the dust removal efficiency and effect, the number of the cavity scrapers 3 is multiple, and the multiple cavity scrapers 3 are evenly distributed along the axial direction of the intake cavity 10. For Figure 1 example, the number of the cavity scrapers 3 is 2, and the 2 cavity scrapers 3 are symmetrically arranged with respect to the center axis of the intake cavity 10.

[0034] Similarly, in order to appropriately increase the dust scraping speed and make full use of the blowing gas of the blowing flange 1, the number of the rotating blades 2 is multiple, exemplarily, 14 to 20, and 16 are shown in the figure.

[0035] It should be noted that the blowing gas of the blowing flange 1 can be an inert gas (for example, nitrogen) or compressed air. Among them, the compressed air can be both the oxygen source of the reaction cavity and the power source of the rotating blade 2.

[0036] Exemplarily, if the blowing gas is nitrogen, that is to say, the blowing flange 1 is a nitrogen flange, the number of the air outlet of the nitrogen flange is more than 2, for example, 4, the diameter of the air outlet is 2 to 5 mm, the nitrogen pressure is above 0.4 Mpa, and the nitrogen volume is above 100 L / min.

[0037] It can be understood that in order to install the rotating blade 2 and the cavity scraper 3, the pneumatic scraper assembly further includes a mounting member, and the rotating blade 2 is rotatably connected to the top of the intake cavity 10 through the mounting member.

[0038] Specifically, the mounting member includes a fixing plate 4, a fixing ring 5 and a rotating bearing 6. The fixing plate 4 is fixedly connected to the top of the intake cavity 10. The fixing ring 5 is located below the fixing plate 4 and fixedly connected to the fixing plate 4. The rotating bearing 6 is sleeved on the outer wall of the fixing ring 5. One end of the rotating blade 2 is hung on the outer ring of the rotating bearing 6, and the rotating blade 2 contacts the lower surface of the fixing plate 4. In this way, while the cavity scraper 3 scrapes the inner wall of the intake cavity 10, the rotating blade 2 can also scrape the lower surface of the fixing plate 4.

[0039] Exemplarily, a support plate 7 is provided at one end of the rotating blade 2. The support plate 7 extends between the rotating bearing 6 and the fixing plate 4. A groove is formed on the side of the support plate 7 facing the rotating bearing 6, and the outer ring of the rotating bearing 6 is inserted into the groove, so that the rotating blade 2 can be hung on the outer ring of the rotating bearing 6.

[0040] From the perspective of structural compactness, the above-mentioned fixing plate 4 is located between the top wall of the air inlet cavity 10 and the blowing flange 1. The space between the blowing flange 1 and the air inlet cavity 10 is utilized to install the fixing plate 4, and the blowing flange 1 can provide a supporting force for the fixing plate 4.

[0041] In order to further perform dust removal treatment on the plasma torch head 11, the above pneumatic scraper assembly further includes a torch head scraper 8. The plasma torch head 11 is located within the annular region of the fixing ring 5. One end of the torch head scraper 8 is fixedly connected to the outer ring of the rotating bearing 6, and the other end of the torch head scraper 8 contacts the plasma torch head 11. In this way, when the rotating blade 2 drives the rotating bearing 6 to rotate, the torch head scraper 8 will also rotate around the central axis of the plasma torch head 11. The torch head scraper 8 and the plasma torch head 11 move relative to each other to perform dust removal on the plasma torch head 11.

[0042] Exemplarily, the shape of the torch head scraper 8 is L-shaped.

[0043] In order to be able to use the cavity scraper 3 to perform dust removal on the reaction cavity, the cavity scraper 3 extends into the reaction cavity. The inner diameter of the reaction cavity is greater than or equal to the inner diameter of the air inlet cavity 10. The dust scraping surface of the cavity scraper 3 is conformal with the inner wall of the air inlet cavity 10 and a part of the inner wall of the reaction cavity, so as to be able to simultaneously perform dust removal treatment on the inner walls of the air inlet cavity 10 and a part of the reaction cavity.

[0044] Embodiment 2

[0045] This embodiment provides a process waste gas treatment system. Refer to Figure 3 , which includes a pneumatic scraper assembly and an intake pipe 9, an air inlet cavity 10, a reaction cavity, and a water tank connected in sequence along the flow direction of the process waste gas. The pneumatic scraper assembly is the pneumatic scraper assembly provided in Embodiment 1. The plasma torch head 11, the blowing flange 1, the rotating blade 2, the cavity scraper 3, the fixing plate 4, the fixing ring 5, the rotating bearing 6, the support plate 7, and the torch head scraper 8 are all located in the air inlet cavity 10.

[0046] Compared with the prior art, the beneficial effects of the process waste gas treatment system provided in this embodiment are basically the same as those of the pneumatic scraper assembly provided in Embodiment 1, and will not be elaborated here one by one.

[0047] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A pneumatic scraper assembly, characterized in that, For dust removal in the air inlet chamber of a process exhaust gas treatment system, the pneumatic scraper assembly includes a blowing flange, a rotating blade, and a chamber scraper disposed in the air inlet chamber; The chamber scraper is disposed on the rotating blade and contacts the inner wall of the air inlet chamber; The air outlet of the blowing flange faces the rotating blade and is used to blow the rotating blade to rotate around the central axis of the air inlet chamber.

2. The pneumatic scraper assembly according to claim 1, wherein, It further includes a mounting member, and the rotating blade is rotatably connected to the top of the air inlet chamber through the mounting member.

3. The pneumatic scraper assembly according to claim 2, wherein The mounting member includes a fixing plate, a fixing ring, and a rotating bearing. The fixing plate is fixedly connected to the top of the air inlet chamber. The fixing ring is located below the fixing plate and fixedly connected to the fixing plate. The rotating bearing is sleeved on the outer wall of the fixing ring, and one end of the rotating blade is hung on the outer ring of the rotating bearing.

4. The pneumatic scraper assembly according to claim 3, wherein The rotating blade contacts the lower surface of the fixing plate.

5. The pneumatic scraper assembly according to claim 3, wherein One end of the rotating blade is provided with a support plate, the support plate extends between the rotating bearing and the fixing plate, a groove is formed on the side of the support plate facing the rotating bearing, and the outer ring of the rotating bearing is inserted into the groove.

6. The pneumatic scraper assembly according to claim 3, wherein The fixing plate is located between the top wall of the air inlet chamber and the blowing flange.

7. The pneumatic scraper assembly according to claim 3, wherein It further includes a torch head scraper. The plasma torch head of the process exhaust gas treatment system is located in the annular area of the fixing ring. One end of the torch head scraper is fixedly connected to the outer ring of the rotating bearing, and the other end of the torch head scraper contacts the plasma torch head.

8. The pneumatic scraper assembly according to claim 7, wherein, The chamber scraper extends into the reaction chamber and contacts part or all of the inner wall of the reaction chamber.

9. The pneumatic scraper assembly according to claim 8, wherein, The inner diameter of the reaction chamber is greater than or equal to the inner diameter of the air inlet chamber, and the dust scraping surface of the chamber scraper is conformal with the inner wall of the air inlet chamber and part or all of the inner wall of the reaction chamber.

10. A process waste gas treatment system, characterized in that, It includes a pneumatic scraper assembly and an air inlet chamber, a reaction chamber, and a water tank connected in sequence along the flow direction of the process exhaust gas. The pneumatic scraper assembly is the pneumatic scraper assembly according to any one of claims 1 to 9.

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