Scraper and process waste gas treatment system

Abstract

The utility model discloses a scraper and a process waste gas treatment system, which belong to the technical field of waste gas treatment and are used for solving the problems of low treatment efficiency and high cost caused by shutdown for dust cleaning in the prior art. In the utility model, the dust scraping piece is fixedly connected with the scraper cantilever; the scraper cantilever is hinged with a rotating shaft of the reciprocating rotating cylinder; the reciprocating rotating cylinder is used for driving the scraper cantilever to swing back and forth; one end of the spring is hung on the scraper cantilever, the other end of the spring is hung on a rotating shaft of the reciprocating rotating air cylinder, the spring, at least part of the scraper cantilever and at least part of the rotating shaft form a triangle, and the spring is always in a stretching state. 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 in particular relates to a scraper and a process waste gas treatment system. Background Art

[0002] In the existing process waste gas treatment system, the dust accumulated on the air inlet flange, air inlet pipe and plasma torch head is usually cleaned by stopping the equipment and cleaning the dust manually.

[0003] However, on the one hand, it is impossible to achieve continuous treatment of exhaust gas, which greatly reduces the treatment efficiency. On the other hand, there is a potential threat to the health of operators and the labor cost of maintenance is also high. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a scraper and process waste gas treatment system to solve the problem in the prior art that dust cleaning requires shutdown resulting in low treatment efficiency and high cost.

[0005] The purpose of the utility model is mainly achieved through the following technical solutions.

[0006] The utility model provides a scraper, comprising a scraper piece, a scraper cantilever, a spring and a reciprocating rotating cylinder; the scraper piece is fixedly connected to the scraper cantilever; the scraper cantilever is hinged to the rotating shaft of the reciprocating rotating cylinder, and the reciprocating rotating cylinder is used to drive the scraper cantilever to swing back and forth; one end of the spring is hung on the scraper cantilever, and the other end is hung on the rotating shaft of the reciprocating rotating cylinder, the spring, at least part of the scraper cantilever and at least part of the rotating shaft form a triangle, and the spring is always in a stretched state.

[0007] Furthermore, the length of the scraping surface of the scraping member is greater than or equal to the diameter of the plasma torch head of the process waste gas treatment system, and the scraping surface of the scraping member completely covers the lower surface of the plasma torch head during the reciprocating swinging process.

[0008] Furthermore, the dust scraping member is located on a side of the scraper cantilever facing the rotary shaft.

[0009] Furthermore, the rotary shaft of the reciprocating rotary cylinder is hinged to the connecting end of the scraper cantilever through a shoulder screw.

[0010] Furthermore, one end of the spring is detachably connected to the scraper cantilever through a first positioning pin, and the other end of the spring is detachably connected to the rotating shaft through a second positioning pin.

[0011] Furthermore, the scraper also includes a sealing cavity, which is connected to the reaction cavity of the process waste gas treatment system through the air inlet flange of the process waste gas treatment system. The rotating shaft passes through the sealing cavity and the air inlet flange in sequence and is hinged to the connecting end of the scraper cantilever.

[0012] Furthermore, the gas pressure in the sealing chamber is greater than the gas pressure in the reaction chamber.

[0013] Furthermore, the rotary axis is respectively perpendicular to the air inlet flange, the scraper cantilever and the dust scraping member.

[0014] Furthermore, the scraper also includes a support column, one end of which is fixedly connected to the cylinder body of the reciprocating rotary cylinder, and the other end of which is fixedly connected to the sealing chamber.

[0015] The utility model also provides a process waste gas treatment system, which includes an air intake pipe, an air intake flange, a reaction chamber, a water tank and a spray tower connected in sequence, and also includes a plasma torch head and the above-mentioned scraper. The plasma torch head is arranged on the air intake flange, and the scraper is used to scrape dust on the lower surface of the plasma torch head, the outlet of the air intake pipe and / or the lower surface of the air intake flange.

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

[0017] The scraper provided by the utility model drives the dust scraper to move relative to the lower surface of the plasma torch head, the outlet of the air inlet pipe and / or the lower surface of the air inlet flange by regularly opening the reciprocating rotating cylinder. It can automatically and mechanically remove dust from the lower surface of the plasma torch head, the outlet of the air inlet pipe and / or the lower surface of the air inlet flange without stopping the machine and without manpower, so as to prevent the blockage of the air inlet flange and the air inlet pipe caused by dust accumulation, ensure that the plasma torch head normally sprays high-temperature flames, ensure the treatment effect of process waste gas, extend the overall maintenance period of the process waste gas treatment system, and reduce the treatment cost of process waste gas. On the other hand, since the rotating shaft of the reciprocating rotating cylinder is hinged with the connecting end of the scraper cantilever, the dust scraper can be closely contacted with the lower surface of the plasma torch head, the outlet of the air inlet pipe and / or the lower surface of the air inlet flange through the setting of the spring, thereby improving the dust removal effect. At the same time, when the scraper switches between the dust removal state and the scraper replacement state, the relative position between the suspended end of the scraper cantilever and the rotating shaft can be adjusted by rotating the scraper cantilever, so as to facilitate the installation and disassembly of the dust scraper.

[0018] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0020] Figure 1 A schematic diagram of the first structure of the scraper provided in the first embodiment of the utility model;

[0021] Figure 2 A second structural schematic diagram of the scraper provided in the first embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the connection between the scraper provided in the first embodiment of the utility model and the air inlet pipe and the air inlet flange;

[0023] Figure 4 This is a schematic structural diagram of the scraper provided in the second embodiment of the utility model.

[0024] Reference numerals:

[0025] 1-dust scraper; 2-scraper cantilever; 3-spring; 4-sleeve; 401-spring movable hole; 5-reciprocating cylinder; 501-rotating shaft; 502-cylinder body; 6-shoulder screw; 7-first positioning pin; 8-second positioning pin; 9-positioning screw; 10-sealing chamber; 11-gas supply assembly; 12-support column; 13-cover plate; 14-quick-release flange; 15-plasma torch head; 16-inlet pipe; 17-inlet flange. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0027] Embodiment 1

[0028] This embodiment provides a scraper for dust removal in a process waste gas treatment system, in which an air inlet pipe 16 , an air inlet flange 17 , a reaction chamber, a water tank and a spray tower are connected in sequence, and a plasma torch head 15 is arranged on the air inlet flange 17 .

[0029] The structure of the scraper is shown in Figures 1 to 3 , including a scraper 1, a scraper cantilever 2, a spring 3 and a reciprocating rotary cylinder 5; wherein the scraper 1 is fixedly connected to the scraper cantilever 2, and the scraping surface of the scraper 1 (i.e. Figure 1The upper surface shown in the figure is in contact with the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17; the rotating shaft 501 of the reciprocating rotating cylinder 5 passes through the through hole on the air inlet flange 17 and is hinged to the connecting end of the scraper cantilever 2 through the shoulder screw 6. The reciprocating rotating cylinder 5 is used to drive the scraper cantilever 2 to swing back and forth, and drive the dust scraper 1 to move relative to the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17, so as to remove dust from the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17; one end of the spring 3 is detachably connected to the scraper cantilever 2 through the first locating pin 7, and the other end of the spring 3 is detachably connected to the rotating shaft 501 through the second locating pin 8, so that the dust scraper 1 can be in close contact with the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17 during the reciprocating swinging process.

[0030] Compared with the prior art, the scraper provided in this embodiment, on the one hand, by regularly opening the reciprocating rotating cylinder 5, drives the dust scraper 1 and the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17 to move relative to each other, and can automatically mechanically remove dust from the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17 without stopping the machine and without manpower, so as to prevent the blockage of the air inlet flange 17 and the air inlet pipe 16 caused by dust accumulation, ensure that the plasma torch head 15 can normally spray high-temperature flames, and can ensure the treatment effect of process exhaust gas, and prolong the service life. The overall maintenance cycle of the process waste gas treatment system reduces the treatment cost of the process waste gas; on the other hand, since the rotating shaft 501 of the reciprocating rotating cylinder 5 is hinged with the connecting end of the scraper cantilever 2, through the setting of the spring 3, the dust scraper 1 can be in close contact with the lower surface of the plasma torch head 15, the outlet of the intake pipe 16 and / or the lower surface of the intake flange 17, thereby improving the dust removal effect. At the same time, when the scraper switches between the dust removal state and the scraper replacement state, the relative position between the suspended end of the scraper cantilever 2 and the rotating shaft 501 can be adjusted by rotating the scraper cantilever 2, thereby facilitating the installation and disassembly of the dust scraper 1.

[0031] It should be noted that in order to ensure that the plasma torch head can be thoroughly dusted, the length of the scraping surface of the scraping piece 1 is greater than or equal to the diameter of the plasma torch head 15, that is, the scraping surface of the scraping piece 1 completely covers the lower surface of the plasma torch head 15 during the reciprocating swinging process.

[0032] Considering that the setting of the scraper destroys the integrity and sealing of the air inlet flange 17, the scraper also includes a sealed chamber 10 and a gas supply assembly 11 connected to the sealed chamber 10. The sealed chamber 10 is connected to the reaction chamber through the air inlet flange 17. The rotary shaft 501 passes through the sealed chamber 10 and the air inlet flange 17 in sequence and is hinged to the connection end of the scraper cantilever 2. The gas pressure in the sealed chamber 10 is greater than the gas pressure in the reaction chamber. In this way, by setting the sealed chamber 10, since the gas pressure in the sealed chamber 10 is greater than the gas pressure in the reaction chamber, the process waste gas in the reaction chamber is prevented from leaking into the external environment from the connection between the air inlet flange 17 and the scraper. The gas supplied by the gas supply assembly 11 is preferably an inert gas or air, such as N2.

[0033] In order to achieve stable installation of the reciprocating rotary cylinder 5, the scraper further includes a support column 12, through which the cylinder body 502 of the reciprocating rotary cylinder 5 is fixedly connected to the sealed chamber 10, that is, one end of the support column 12 is fixedly connected to the cylinder body 502 of the reciprocating rotary cylinder 5, and the other end of the support column 12 is fixedly connected to the sealed chamber 10. In addition, the reciprocating rotary cylinder 5 is separated from the sealed chamber 10 by the support column 12, which can prevent the high temperature of the reaction chamber from being conducted to the cylinder body 502, causing the reciprocating rotary cylinder 5 to overheat and damage the reciprocating rotary cylinder 5.

[0034] In order to realize the rapid disassembly of the scraper 1, the scraper also includes a cover plate 13, and a quick-release flange 14 is provided on the air inlet flange 17. The cover plate 13 is located between the sealing chamber 10 and the quick-release flange 14. One end of the cover plate 13 is detachably and fixedly connected to the air inlet flange 17 through the quick-release flange 14, and the other end of the cover plate 13 is connected to the sealing chamber 10, and the quick-release flange 14 is fixedly arranged on the air inlet flange 17. When the scraper 1 needs to be replaced, the cover plate 13 is removed from the quick-release flange 14, and the reciprocating rotary cylinder 5, the cover plate 13, the scraper cantilever 2 and the scraper 1 are taken out of the reaction chamber together, and the scraper 1 can be quickly replaced without disassembling the heavy air inlet flange 17 and the reaction chamber.

[0035] It should be understood that the quick-release flange 14 can also be arranged as a part of the scraper. When the scraper needs to be installed on the process exhaust gas treatment system, the quick-release flange is fixedly installed on the air inlet flange 17. When replacing the scraper, it is only necessary to remove the other parts except the quick-release flange 14, replace the parts to be replaced, and then fix the other parts of the scraper except the quick-release flange 14 to the quick-release flange again.

[0036] As for the structure of the scraper 1, exemplarily, it adopts a sheet-like structure or a brush-like structure.

[0037] Specifically, for the scraper 1 of sheet structure, see Figure 1, including a rigid mounting plate and an elastic scraper, the elastic scraper is fixedly connected to the scraper cantilever 2 through the rigid mounting plate, the rigid mounting plate is detachably fixedly connected to the scraper cantilever 2 through screws, and the elastic scraper contacts the lower surface of the plasma torch head 15 and / or the lower surface of the air inlet flange 17, so that the rigid mounting plate can ensure that the scraper 1 has sufficient mechanical strength and contact force with the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17, and the elastic scraper can ensure that the scraper 1 is in close contact with the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17, further improving the dust removal efficiency and dust removal effect of the scraper. The scraper 1 is preferably made of 316 stainless steel that allows a certain elastic deformation.

[0038] For the scraper element 1 with a brush-like structure, see Figure 2 , including a rigid mounting rod and bristles arranged on the outer wall of the rigid mounting rod, at least one end of the rigid mounting rod is fixedly connected to the scraper cantilever 2 (for example, welding or clamping), from the perspective of installation stability, both ends of the rigid mounting rod are fixedly connected to the scraper cantilever 2, the bristles are in contact with the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17, similarly, the rigid mounting rod can ensure that the scraper 1 has sufficient mechanical strength and contact force with the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17, the bristles can ensure that the scraper 1 is in close contact with the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the air inlet flange 17, thereby further improving the dust removal efficiency and effect of the scraper.

[0039] Exemplarily, the cylinder body 502, support column 12, sealing chamber 10, cover plate 13 and quick-release flange 14 of the reciprocating rotary cylinder 5 are located above the air inlet flange 17, and the quick-release flange 14, cover plate 13, sealing chamber 10, support column 12 and cylinder body 502 of the reciprocating rotary cylinder 5 are connected in sequence in the direction gradually away from the air inlet flange 17; the rotary shaft 501 of the reciprocating rotary cylinder 5 passes through the sealing chamber 10, cover plate 13, quick-release flange 14 and air inlet flange 17 in sequence and then extends into the reaction chamber and is hinged to the connection end of the scraper cantilever 2. The rotating shaft 501 is respectively perpendicular to the air inlet flange 17, the scraper cantilever 2 and the scraper 1, that is, the air inlet flange 17, the scraper cantilever 2 and the scraper 1 are parallel to each other, so that the scraper 1 is more closely fitted to the air inlet flange 17. The spring 3 is located on the side of the rotating shaft 501 close to the central axis of the air inlet flange 17, and is located above the scraper cantilever 2 and below the plasma torch head 15. The spring 3, part of the rotating shaft 501 and part of the scraper cantilever 2 form a triangle, and the scraper 1 is located on the side of the scraper cantilever 2 facing the rotating shaft 501.

[0040] Embodiment 2

[0041] This embodiment provides a scraper, whose structure is basically the same as that of the scraper provided in the first embodiment, except that:

[0042] The scraper of this embodiment also includes a sleeve 4, see Figure 4 The sleeve 4 is sleeved outside the rotary shaft 501, and a spring movable hole 401 is provided on the sleeve 4. The other end of the spring 3 is detachably connected to the rotary shaft 501 through a second positioning pin 8 that penetrates the spring movable hole 401; the scraper has a dust removal state and a scraper replacement state: the scraper is in the dust removal state, see Figure 1 The sleeve 4 is detachably fixedly connected to the rotating shaft 501 by a positioning screw 9 (for example, a hexagon socket screw), and the bottom end of the sleeve 4 abuts against the scraper cantilever 2; the scraper is in the scraper replacement state, the positioning screw 9 is removed, the sleeve 4 is slidingly connected to the rotating shaft 501, and the horizontal distance between the suspended end of the scraper cantilever 2 and the rotating shaft 501 in the dust removal state is greater than the horizontal distance between the suspended end of the scraper cantilever 2 and the rotating shaft 501 in the scraper replacement state.

[0043] It should be understood that although Figure 1 When the scraper shown in the figure is in the dust removal state, the bottom end of the sleeve 4 abuts against the scraper cantilever 2, but in other embodiments, the bottom end of the sleeve 4 can also be set to be spaced from the scraper cantilever 2 without departing from the scope of the utility model. Those skilled in the art can make arrangements according to actual needs.

[0044] Compared with the prior art, the scraper provided in this embodiment and the setting of the sleeve 4 enable the bottom end of the sleeve 4 to abut against the scraper cantilever 2 when the scraper is in the dust removal state, thereby limiting the angle between the scraper cantilever 2 and the rotating shaft 501 and ensuring the installation stability of the scraping assembly during dust scraping.

[0045] In practical applications, when the sleeve 4 is provided, the specific process for replacing the scraper is as follows:

[0046] Remove the cover plate 13 from the quick-release flange 14, then gently lift the cylinder body 502 until the positioning screw 9 is exposed above the quick-release flange 14, pull out the positioning screw 9 on the sleeve 4, and the sleeve 4 can now slide on the rotating shaft 501. At this time, continue to pull out the cylinder body 502, and the reciprocating rotating cylinder 5, the cover plate 13, the sleeve 4, the scraper cantilever 2 and the dust scraper 1 can be taken out of the reaction chamber together, and the dust scraper 1 can be quickly replaced without disassembling the heavy air intake flange 17 and the reaction chamber.

[0047] In order to adapt to the sliding between the sleeve 4 and the rotating shaft 501, the spring movable hole 401 is in the shape of a long strip, and the length direction is arranged along the axial direction of the sleeve 4. During the sliding process of the sleeve 4, the other end of the spring 3 and the second positioning pin 8 can slide in the long strip spring movable hole 401 to avoid interference between the movement of the sleeve 4 and the other end of the spring 3 and the second positioning pin 8.

[0048] Embodiment 3

[0049] The present embodiment provides a process waste gas treatment system, including an air inlet pipe 16, an air inlet flange 17, a reaction chamber, a water tank and a spray tower connected in sequence, and also includes a plasma torch head 15 and a scraper provided in Example 1 or Example 2. The plasma torch head 15 is arranged on the air inlet flange 17, and the scraper is used to scrape off dust on the lower surface of the plasma torch head 15, the outlet of the air inlet pipe 16 and / or the lower surface of the air inlet flange 17. The above-mentioned dust scraping member 1, scraper cantilever 2, spring 3, sleeve 4 are located in the reaction chamber, and the cylinder body 502 of the reciprocating rotating cylinder 5 is located outside the reaction chamber.

[0050] Compared with the prior art, the beneficial effects of the process waste gas treatment system provided in this embodiment are substantially the same as the beneficial effects of the scraper provided in Embodiment 1 or Embodiment 2, and are not described in detail here.

[0051] The above description is only a 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 any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A scraper for a process waste gas treatment system, characterized in that: It includes a dust scraper, a scraper cantilever, a spring and a reciprocating rotary cylinder; the dust scraper is fixedly connected to the scraper cantilever; The scraper cantilever is hinged to the rotary shaft of the reciprocating rotary cylinder, and the reciprocating rotary cylinder is used to drive the scraper cantilever to swing back and forth; One end of the spring is hung on the scraper cantilever, and the other end is hung on the rotary shaft of the reciprocating rotary cylinder. The spring, at least part of the scraper cantilever and at least part of the rotary shaft form a triangle, and the spring is always in a stretched state.

2. The scraper according to claim 1, characterized in that: The length of the scraping surface of the scraping piece is greater than or equal to the diameter of the plasma torch head of the process waste gas treatment system, and the coverage of the scraping surface of the scraping piece during the reciprocating swing process completely covers the lower surface of the plasma torch head.

3. The scraper according to claim 1, characterized in that: The dust scraping member is located on the side of the scraper cantilever facing the rotary shaft.

4. The scraper according to claim 1, characterized in that: The rotary shaft of the reciprocating rotary cylinder is hinged to the connecting end of the scraper cantilever through a shoulder screw.

5. The scraper according to claim 1, characterized in that: One end of the spring is detachably connected to the scraper cantilever through a first positioning pin, and the other end of the spring is detachably connected to the rotary shaft through a second positioning pin.

6. The scraper according to claim 1, characterized in that: It also includes a sealing cavity, which is connected to the reaction cavity of the process waste gas treatment system through the air inlet flange of the process waste gas treatment system. The rotary shaft passes through the sealing cavity and the air inlet flange in sequence and is hinged to the connecting end of the scraper cantilever.

7. The scraper according to claim 6, characterized in that: The gas pressure in the sealed chamber is greater than the gas pressure in the reaction chamber.

8. The scraper according to claim 6, characterized in that: The rotary shaft is respectively perpendicular to the air inlet flange, the scraper cantilever and the dust scraping member.

9. The scraper according to claim 6, characterized in that: It also includes a support column, one end of which is fixedly connected to the cylinder body of the reciprocating rotary cylinder, and the other end of which is fixedly connected to the sealing chamber.

10. A process waste gas treatment system, characterized in that: It includes an air inlet pipe, an air inlet flange, a reaction chamber, a water tank and a spray tower connected in sequence, and also includes a plasma torch head and a scraper as described in any one of claims 1 to 9, the plasma torch head is arranged on the air inlet flange, and the scraper is used to scrape dust on the lower surface of the plasma torch head, the outlet of the air inlet pipe and / or the lower surface of the air inlet flange.

Images