Nitrogen-containing waste gas oxidation treatment device

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a nitrogen-containing waste gas oxidation treatment device which comprises a working plate, a plurality of supporting columns are fixed at the bottom end of the working plate, a mounting groove is formed in the top surface of the working plate, and a treatment cylinder is mounted in the mounting groove in the top surface of the working plate. According to the utility model, a dilute nitric acid solution can be contained by arranging the treatment cylinder, a discharge pipe of an external waste gas collection device is tightly sleeved with the gas inlet pipe, and nitrogen-containing waste gas can be diffused upwards from the bottom of the treatment cylinder by virtue of the design of the gas inlet mechanism; through the design of the gas inlet mechanism, the gas injection disc and a plurality of stirring rods can be driven to rotate, so that the gas injection disc can be driven to rotate and perform gas injection operation at the same time, the range of gas ejected by the gas injection disc is wider and more uniform, and through the design of the plurality of stirring rods, waste gas and a dilute nitric acid solution can be mixed; further, the reaction between the waste gas and the dilute nitric acid solution is more sufficient, and the using effect of the whole device is better.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a nitrogen-containing waste gas oxidation treatment device. Background Art

[0002] Nitrogen-containing waste gas oxidation treatment refers to the process of converting waste gas containing nitrogen compounds into harmless substances through oxidation reaction.

[0003] In the process of industrial production, it is often necessary to oxidize nitric acid tail gas. An oxidation treatment device is needed in the oxidation treatment process. The commonly used oxidation treatment device is to pass the nitric acid waste gas into a dilute nitric acid solution. The dilute nitric acid solution reacts with the waste gas to treat the waste gas. However, most of these treatment devices directly pass the waste gas into the dilute nitric acid solution, and most of them do not have a structure for fully mixing the waste gas and the dilute nitric acid solution, which leads to uneven mixing of the waste gas and the dilute nitric acid solution, resulting in poor treatment effect of the entire device. In view of this, we propose an oxidation treatment device for nitrogen-containing waste gas. Utility Model Content

[0004] The utility model aims to provide a nitrogen-containing waste gas oxidation treatment device to solve the problem that the commonly used oxidation treatment device proposed in the above background technology is to pass the nitric acid waste gas into a dilute nitric acid solution, and the waste gas can be treated by the reaction of the dilute nitric acid solution with the waste gas, but most of this type of treatment devices directly pass the waste gas into the dilute nitric acid solution, and most of them are not provided with a structure for fully mixing the waste gas and the dilute nitric acid solution, which leads to uneven mixing of the waste gas and the dilute nitric acid solution, resulting in a poor treatment effect of the entire device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A nitrogen-containing waste gas oxidation treatment device comprises a working plate, a plurality of support columns are fixed to the bottom end of the working plate, a mounting groove is provided on the top surface of the working plate, a treatment cylinder is installed inside the mounting groove on the top surface of the working plate, a liquid inlet pipe connected to the inner cavity of the treatment cylinder is fixed to the top surface of the treatment cylinder, a liquid discharge pipe connected to the inner cavity of the treatment cylinder is fixed to the bottom end of the treatment cylinder, and valves are installed on the outer walls of the liquid discharge pipe and the liquid inlet pipe, and also comprises:

[0007] The exhaust gas fan of the present invention is connected with the exhaust gas fan of the present invention, and the exhaust gas fan of the present invention is connected with the exhaust gas of the present invention in an orderly manner.

[0008] As a preferred embodiment, the air intake mechanism further comprises a rotating shaft coaxially connected to the output shaft of the motor, and the two gears are coaxially fixed on the rotating shaft and the circumferential outer wall of the air outlet pipe respectively.

[0009] As a preferred implementation, the plurality of support columns at the bottom end of the working plate are arranged in a matrix, and a support plate is fixed to the bottom end of the support columns.

[0010] As a preferred embodiment, the parts where the liquid inlet pipe and the liquid discharge pipe contact the treatment cylinder are provided with sealing rings, the parts where the air inlet box contacts the air inlet pipe and the air outlet pipe are provided with sealing rings, and the parts where the air outlet pipe contacts the treatment cylinder and the jet disk are also provided with sealing rings.

[0011] As a preferred embodiment, the bottom end of the treatment cylinder is in a structure that is concave toward the middle, and the degree of concavity is 14-27°.

[0012] As a preferred implementation, the air intake mechanism further comprises a protection box fixed on the top surface of the working plate, the motor is located inside the protection box, and the rotating shaft passes through the top surface of the protection box.

[0013] As a preferred embodiment, an anti-skid plate matching the shape of the support plate is fixed to the bottom end of the support plate, the thickness of the anti-skid plate is 2-7 cm, and the bottom end of the anti-skid plate is provided with anti-skid patterns.

[0014] As a preferred embodiment, the distance between the protection box and the air outlet pipe is 3-11 cm, and the distance between the protection box and the gear on the same side is 6-14 cm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can contain the dilute nitric acid solution by arranging a treatment cylinder, and the discharge pipe of the external exhaust gas collection device is tightly connected with the intake pipe. The nitrogen-containing exhaust gas can be diffused upward from the bottom of the treatment cylinder by the design of the intake mechanism. The design of the intake mechanism can drive the jet disk and a plurality of stirring rods to rotate, so that the jet disk can be driven to perform jetting operation while rotating, so that the range of the jet disk to spray gas is wider and more uniform, and the design of a plurality of stirring rods can mix the exhaust gas with the dilute nitric acid solution, so that the reaction of the exhaust gas and the dilute nitric acid solution is more sufficient, so that the use effect of the whole device is better;

[0017] 2. The bottom of the treatment tube in the utility model is in a structure that is concave in all directions toward the middle, and the degree of concave is 14-27 degrees, so that the liquid after the reaction in the treatment tube can be discharged smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the overall structural diagrams of the utility model;

[0019] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a schematic diagram of a local structure in the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the processing cylinder in the utility model;

[0022] Figure 5 It is a schematic diagram of the overall structure of the air intake mechanism in the utility model;

[0023] Figure 6 This is one of the partial exploded views of the air intake mechanism in the utility model;

[0024] Figure 7 This is the second partial exploded view of the air intake mechanism in the utility model.

[0025] The meaning of each number in the figure is:

[0026] 1. Working plate; 2. Processing cylinder; 3. Support column; 4. Liquid inlet pipe; 5. Liquid discharge pipe; 6. Valve; 7. Air intake mechanism; 71. Air intake box; 72. Fixed column; 73. Air inlet pipe; 74. Air outlet pipe; 75. Jet disc; 76. Stirring rod; 77. Gear; 78. Motor; 79. Rotating shaft; 710. Protective box; 8. Support plate; 9. Anti-skid plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 7 The utility model provides a technical solution: a nitrogen-containing waste gas oxidation treatment device, including a working plate 1, a plurality of support columns 3 are fixed at the bottom end of the working plate 1, a mounting groove is provided on the top surface of the working plate 1, a treatment cylinder 2 is installed inside the mounting groove on the top surface of the working plate 1, a liquid inlet pipe 4 connected to the inner cavity of the treatment cylinder 2 is fixed on the top surface of the treatment cylinder 2, a liquid discharge pipe 5 connected to the inner cavity of the treatment cylinder 2 is fixed at the bottom end of the treatment cylinder 2, and valves 6 are installed on the outer walls of the liquid discharge pipe 5 and the liquid inlet pipe 4, and also includes:

[0029] The air intake mechanism 7 is arranged on the top surface of the treatment tube 2, and is used to transport the waste gas that needs to be treated to the inside of the treatment tube 2. The air intake mechanism 7 includes an air intake box 71 located above the treatment tube 2 and fixed thereto by a plurality of fixing columns 72, an air intake pipe 73 fixed on the top surface of the air intake box 71 and connected to its inner cavity, and an air outlet pipe 74 rotatably connected to the bottom surface of the air intake box 71 and connected to its inner cavity. The air outlet pipe 74 passes through the top surface of the treatment tube 2 and extends to the inside of the treatment tube 2 near the bottom end. The air intake mechanism 7 also includes a jet disk 75 fixed on the bottom surface of the air outlet pipe 74 and connected to its inner cavity, two gears 77 located between the treatment tube 2 and the air intake box 71 and used to drive the air outlet pipe 74 to rotate, and a motor 78 installed on the top surface of the treatment tube 2 and used to drive the two gears 77 to rotate. The two gears 77 are meshed with each other, and the circular shape of the jet disk 75 A plurality of air outlet holes connected to the inner cavity are provided on the outer wall and the bottom surface, and a plurality of stirring rods 76 located inside the treatment tube 2 are fixed on the outer wall of the circumference of the air outlet pipe 74. The treatment tube 2 is provided so that the dilute nitric acid solution can be contained, and the discharge pipe of the external exhaust gas collection device is tightly connected with the air inlet pipe 73. The design of the air intake mechanism 7 can diffuse the nitrogen-containing exhaust gas from the bottom of the treatment tube 2 upward. The design of the air intake mechanism 7 can drive the jet disk 75 and the plurality of stirring rods 76 to rotate, so that the jet disk 75 can be driven to perform the jetting operation while rotating, so that the range of the gas ejected by the jet disk 75 is wider and more uniform, and the design of the plurality of stirring rods 76 can mix the exhaust gas with the dilute nitric acid solution, so that the reaction between the exhaust gas and the dilute nitric acid solution is more sufficient, so that the use effect of the whole device is better.

[0030] In this embodiment, the air intake mechanism 7 also includes a rotating shaft 79 coaxially connected to the output shaft of the motor 78, and two gears 77 are coaxially fixed on the rotating shaft 79 and the circumferential outer wall of the air outlet pipe 74, respectively, which can smoothly drive the two gears 77 to rotate, and then indirectly drive the air outlet pipe 74 and the jet disk 75 to rotate.

[0031] In addition, a plurality of support columns 3 at the bottom of the working plate 1 are arranged in a matrix, and a support plate 8 is fixed to the bottom of the support columns 3 to support the entire device.

[0032] Furthermore, sealing rings are provided at the positions where the liquid inlet pipe 4 and the liquid discharge pipe 5 contact the treatment cylinder 2, sealing rings are provided at the positions where the air inlet box 71 contacts the air inlet pipe 73 and the air outlet pipe 74, and sealing rings are also provided at the positions where the air outlet pipe 74 contacts the treatment cylinder 2 and the jet disk 75, to prevent air or liquid leakage.

[0033] Specifically, the bottom end of the treatment tube 2 is in a structure that is concave in all directions toward the middle, and the degree of concavity is 14-27°, preferably 22°, so that the liquid after the reaction in the treatment tube 2 can be discharged smoothly.

[0034] It is worth noting that the air intake mechanism 7 also includes a protection box 710 fixed on the top surface of the working plate 1, the motor 78 is located inside the protection box 710, and the rotating shaft 79 passes through the top surface of the protection box 710, which can protect the motor 78 and thus extend the service life of the motor 78.

[0035] It is worth mentioning that an anti-skid plate 9 matching its shape is fixed to the bottom of the support plate 8. The thickness of the anti-skid plate 9 is 2-7 cm, and an anti-slip pattern is provided at the bottom of the anti-skid plate 9, which is preferably 6 cm in this article, thereby increasing the friction between the entire device and the ground, thereby making the entire device more stable during operation.

[0036] It is worth emphasizing that the distance between the protection box 710 and the air outlet pipe 74 is 3-11 cm, and the distance between the protection box 710 and the gear 77 on the same side is 6-14 cm. In this article, the distance between the protection box 710 and the air outlet pipe 74 is preferably 10 cm, and the distance between the protection box 710 and the gear 77 on the same side is preferably 11 cm, so that the rotation of the two gears 77 and the air outlet pipe 74 can be unimpeded.

[0037] Among them, the motor 78 involved in this embodiment is a prior art, and its structure and working principle are well known to those skilled in the art, and will not be elaborated here.

[0038] In the specific use of this embodiment, when it is necessary to treat the nitrogen-containing waste gas, first open the valve 6 on the outer wall of the liquid inlet pipe 4, then add an appropriate amount of dilute nitric acid solution to the inside of the treatment tube 2 through the liquid inlet pipe 4, and close the valve 6 through the external PLC after the addition is completed, and then the discharge pipe of the external waste gas collection device is tightly connected with the air inlet pipe 73, and then start the solenoid valve and the motor 78 on the outer wall of the discharge pipe of the external waste gas collection device through the external PLC, and the waste gas is transported from the external discharge pipe to the inside of the air inlet pipe 73, and the waste gas entering the inside of the air inlet pipe 73 is then passed into the air inlet box 71 and into the inside of the air outlet pipe 74, and the waste gas entering the inside of the air outlet pipe 74 then enters the jet disc 75 and is discharged from the plurality of air outlet holes on its outer wall to the inside of the dilute nitric acid solution;

[0039] At the same time, the output shaft of the motor 78 rotates and drives the rotating shaft 79 coaxially connected thereto to rotate. The rotation of the rotating shaft 79 drives the coaxially fixed gear 77 on the same side to rotate. The rotation of the gear 77 drives another gear 77 meshing therewith to rotate. The rotation of the other gear 77 drives the outlet pipe 74 coaxially fixed thereto to rotate. The rotation of the outlet pipe 74 drives the jet disk 75 fixed thereto to rotate, thereby driving the jet disk 75 to diffuse the exhaust gas while rotating. The rotation of the outlet pipe 74 also drives the rotation of several stirring rods 76 fixed thereto. The rotation of several stirring rods 76 can stir the exhaust gas diffused from bottom to top, thereby making the exhaust gas and the dilute nitric acid solution fully mixed. After a period of reaction, the external solenoid valve and the motor 78 are closed by the external PLC, and then the collection pipe of the external waste liquid collection device is tightly connected with the drain pipe 5. The valve 6 on the outer wall of the drain pipe 5 is opened to discharge the waste liquid generated by the reaction inside the treatment cylinder 2.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A nitrogen-containing waste gas oxidation treatment device, comprising a working plate (1), characterized in that: A plurality of support columns (3) are fixed to the bottom end of the working plate (1); a mounting groove is provided on the top surface of the working plate (1); a processing cylinder (2) is installed inside the mounting groove on the top surface of the working plate (1); a liquid inlet pipe (4) connected to the inner cavity of the processing cylinder (2) is fixed to the top surface of the processing cylinder (2); a liquid discharge pipe (5) connected to the inner cavity of the processing cylinder (2) is fixed to the bottom end of the processing cylinder (2); valves (6) are installed on the outer walls of the liquid discharge pipe (5) and the liquid inlet pipe (4); and further comprising: An air intake mechanism (7) is arranged on the top surface of the treatment tube (2) and is used to transport the waste gas to be treated to the inside of the treatment tube (2). The air intake mechanism (7) comprises an air intake box (71) located above the treatment tube (2) and fixed to it by a plurality of fixing columns (72), an air intake pipe (73) fixed to the top surface of the air intake box (71) and connected to its inner cavity, and an air outlet pipe (74) rotatably connected to the bottom surface of the air intake box (71) and connected to its inner cavity. The air outlet pipe (74) penetrates the top surface of the treatment tube (2) and extends to the inside of the treatment tube (2) near the bottom end. The air intake mechanism (7) also comprises a fixed A jet disk (75) is fixed on the bottom surface of the air outlet pipe (74) and connected to its inner cavity, two gears (77) are located between the processing tube (2) and the air inlet box (71) and are used to drive the air outlet pipe (74) to rotate, and a motor (78) is installed on the top surface of the processing tube (2) and is used to drive the two gears (77) to rotate, the two gears (77) are meshed with each other, and a plurality of air outlet holes connected to its inner cavity are provided on the circumferential outer wall and the bottom surface of the jet disk (75), and a plurality of stirring rods (76) located inside the processing tube (2) are fixed on the circumferential outer wall of the air outlet pipe (74).

2. The nitrogen-containing waste gas oxidation treatment device according to claim 1, characterized in that: The air intake mechanism (7) further comprises a rotating shaft (79) coaxially connected to the output shaft of the motor (78), and the two gears (77) are coaxially fixed on the rotating shaft (79) and the circumferential outer wall of the air outlet pipe (74), respectively.

3. The nitrogen-containing waste gas oxidation treatment device according to claim 1, characterized in that: A plurality of support columns (3) at the bottom end of the working plate (1) are arranged in a matrix, and a support plate (8) is fixed to the bottom end of the support column (3).

4. The nitrogen-containing waste gas oxidation treatment device according to claim 1, characterized in that: The portions where the liquid inlet pipe (4) and the liquid discharge pipe (5) contact the treatment cylinder (2) are provided with sealing rings, the portions where the air inlet box (71) contacts the air inlet pipe (73) and the air outlet pipe (74) are provided with sealing rings, and the portions where the air outlet pipe (74) contacts the treatment cylinder (2) and the jet disc (75) are also provided with sealing rings.

5. The nitrogen-containing waste gas oxidation treatment device according to claim 1, characterized in that: The bottom end of the treatment cylinder (2) is in a structure that is concave toward the middle, and the degree of concavity is 14-27°.

6. The nitrogen-containing waste gas oxidation treatment device according to claim 2, characterized in that: The air intake mechanism (7) further comprises a protection box (710) fixed on the top surface of the working plate (1), the motor (78) is located inside the protection box (710), and the rotating shaft (79) passes through the top surface of the protection box (710).

7. The nitrogen-containing waste gas oxidation treatment device according to claim 3, characterized in that: The bottom end of the support plate (8) is fixed with an anti-skid plate (9) that matches its shape, the thickness of the anti-skid plate (9) is 2-7 cm, and the bottom end of the anti-skid plate (9) is provided with anti-skid patterns.

8. The nitrogen-containing waste gas oxidation treatment device according to claim 6, characterized in that: The distance between the protection box (710) and the air outlet pipe (74) is 3-11 cm, and the distance between the protection box (710) and the gear (77) on the same side is 6-14 cm.

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