Nitrogen oxide conversion device for flue gas detection

Abstract

The utility model relates to a nitric oxide conversion device for flue gas detection, which comprises a shell, a fixed pipe fitting is fixedly mounted on the inner wall of the shell, two fixed plates are fixedly mounted on the inner wall of the fixed pipe fitting, a connecting pipe is fixedly mounted on the surface of one of the fixed plates, and the connecting pipe is fixedly mounted on the surface of the other fixed plate. A plurality of flow dividing pipes are fixedly mounted on the surface of one fixing plate, a plurality of flow dividing pipes are fixedly mounted on the surface of the other fixing plate, the fixing pipe fitting is divided into a left air suction cavity, a middle heating cavity and a right air inlet cavity by the two fixing plates, a catalysis assembly is arranged on the inner wall of the heating cavity, and an electric heating pipe is further fixedly mounted on the outer wall of the heating cavity and located in the shell. According to the nitrogen oxide conversion device for flue gas detection, a part of reacted nitrogen oxide gas can return to the interior of the gas inlet cavity through the preheating pipe to preheat the nitrogen oxide gas in the gas inlet cavity, so that the temperature rise of the nitrogen oxide gas is quicker, and the conversion efficiency of the nitrogen compound converter is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen oxide converters, in particular to a nitrogen oxide converter device for flue gas detection. Background Art

[0002] The nitrogen oxide converter is a device that converts NO2 into NO under the action of a catalyst at high temperature. The key point of the device is to control the reaction temperature and the activity of the catalyst. Currently common catalysts include molybdenum carbide and molybdenum wire. The reaction temperature ranges from 180°C to 400°C. The external dimensions, catalyst dosage and control temperature of the converter vary from manufacturer to manufacturer, and the conversion efficiency and service life also vary.

[0003] The conversion of nitrogen dioxide into nitrogen monoxide is generally carried out by heating catalysis. However, when the existing nitrogen oxide converter is in use, nitrogen dioxide mostly enters the converter from one end of the converter, and its distribution is not uniform, which easily affects the efficiency of converting nitrogen dioxide into nitrogen monoxide.

[0004] In view of this, Chinese patent CN219984292U discloses a nitrogen oxide converter, which is provided with equalizing holes. Since the equalizing holes are provided in different directions, the nitrogen dioxide entering the equalizing box is dispersed through the equalizing holes and then enters the converter for heating. Heating plates are provided on both sides of the heater, so that the nitrogen dioxide after equalization is evenly heated, which significantly improves the conversion rate of nitrogen dioxide.

[0005] However, by comparing the above existing documents, the inventors believe that the effect of improving the conversion efficiency by uniformly circulating nitrogen dioxide is relatively simple, and the conversion efficiency of the nitrogen oxide converter needs to be further improved. Therefore, we propose a nitrogen oxide conversion device for flue gas detection to solve the above problems. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a nitrogen oxide conversion device for flue gas detection, which has the advantage of higher conversion efficiency of the nitrogen oxide converter.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nitrogen oxide conversion device for flue gas detection, comprising a shell, a fixed pipe fitting is fixedly installed on the inner wall of the shell, two fixed plates are fixedly installed on the inner wall of the fixed pipe fitting, a connecting pipe is fixedly installed on the surface of one of the fixed plates, and a plurality of shunt pipes are fixedly installed on the surface of the other fixed plate, and the two fixed plates divide the fixed pipe fitting into an air suction chamber on the left, a heating chamber in the middle and an air intake chamber on the right, wherein a catalytic component is provided on the inner wall of the heating chamber, an electric heating pipe is also fixedly installed on the outer wall of the heating chamber and located inside the shell, the electric heating pipe is spirally wound on the outer wall of the heating chamber, a fan is fixedly installed inside the air suction chamber, and a preheating pipe is also fixedly installed between the air suction chamber and the air intake chamber.

[0008] Furthermore, the preheating tube is a one-way air tube, and a temperature sensor for detecting the temperature is fixedly installed on the inner wall of the heating chamber.

[0009] Furthermore, the catalytic assembly includes a molybdenum mesh and a mounting ring, wherein the mounting ring is fixedly mounted on the inner wall of the heating chamber, and the molybdenum mesh is fixedly mounted on one side of the mounting ring by bolts.

[0010] Furthermore, the connecting pipe is located on a side of the fixed pipe member close to the fan, and the diverter pipe is located on a side of the fixed pipe member close to the catalytic component.

[0011] Furthermore, a controller is fixedly mounted on the surface of the housing, and the temperature sensor is electrically connected to the controller via a wire.

[0012] Furthermore, a tee is fixedly installed on both sides of the shell, an outlet pipe and an exhaust pipe are fixedly installed on both ends of the left tee, and an intake pipe and an air intake pipe are fixedly installed on both ends of the right tee, valves are fixedly installed on the surfaces of the outlet pipe, exhaust pipe, intake pipe and air intake pipe, and dustproof plates are fixedly installed on the ends of the exhaust pipe and the air intake pipe.

[0013] Furthermore, the housing further comprises a first shell, a second shell and two mounting plates, the two mounting plates are respectively fixedly mounted on opposite sides of the first shell and the second shell, and the two mounting plates are fixed to each other by bolts.

[0014] Furthermore, the fixed pipe also includes a first fixed pipe and a second fixed pipe, a slot is provided on a side of the second fixed pipe close to the first fixed pipe, and a sealing plate extending into the slot is fixedly installed on a side of the first fixed pipe close to the second fixed pipe.

[0015] Compared with the prior art, the utility model provides a nitrogen oxide conversion device for flue gas detection, which has the following beneficial effects:

[0016] 1. The nitrogen oxide conversion device for flue gas detection can make the nitrogen oxide gas flowing into the heating chamber more evenly distributed through the shunt pipe, and the electric heating tube is spirally wound and distributed on the outside of the heating chamber, which can greatly improve the heating efficiency of the nitrogen oxide. At the same time, the catalytic component is located on one side of the shunt pipe, so that the nitrogen oxide gas after uniform shunting has a wider area when in contact with the catalytic component, and the distribution is more even, which improves the catalytic reaction efficiency. A part of the reacted nitrogen oxide gas can also return to the inside of the intake chamber through the preheating tube to preheat the nitrogen oxide gas inside the intake chamber, thereby making it heat up faster, thereby further improving the conversion efficiency of the nitrogen compound converter.

[0017] 2. The nitrogen oxide conversion device for flue gas detection is configured to be easily disassembled and replaced by dividing the outer shell and the fixed pipe into two parts, that is, after the first shell and the second fixed pipe are disassembled by bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the front view of the utility model;

[0019] Figure 2 This is a schematic diagram of the fixed pipe fitting and the electric heating pipe of the utility model;

[0020] Figure 3 This is a cross-sectional view of the housing of the utility model;

[0021] Figure 4 It is a schematic diagram of the slot, sealing plate, catalytic component and diverter pipe of the utility model.

[0022] In the figure: 1. outer shell; 101. first shell; 102. mounting plate; 103. second shell; 2. fixed pipe; 201. first fixed pipe; 202. second fixed pipe; 203. slot; 204. sealing plate; 3. fixed plate; 4. shunt pipe; 5. connecting pipe; 6. air inlet cavity; 7. heating cavity; 8. air suction cavity; 9. electric heating pipe; 10. preheating pipe; 11. catalytic component; 1101. molybdenum mesh; 1102. mounting ring; 12. exhaust pipe; 13. fan; 14. temperature sensor; 15. controller; 16. tee; 17. air inlet pipe; 18. air suction pipe; 19. dustproof plate; 20. air outlet pipe; 21. valve. DETAILED DESCRIPTION

[0023] 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. 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.

[0024] See also Figure 1 and Figure 3 A nitrogen oxide conversion device for flue gas detection includes a shell 1, a fixed pipe 2 is fixedly installed on the inner wall of the shell 1, two fixed plates 3 are fixedly installed on the inner wall of the fixed pipe 2, a connecting pipe 5 is fixedly installed on the surface of one of the fixed plates 3, and a plurality of shunt pipes 4 are fixedly installed on the surface of the other fixed plate 3, and the two fixed plates 3 divide the fixed pipe 2 into an air suction chamber 8 on the left, a heating chamber 7 in the middle, and an air intake chamber 6 on the right.

[0025] The diverter pipe 4 allows the nitrogen oxide gas flowing into the heating chamber 7 to be distributed more evenly, thereby improving the heating efficiency of the nitrogen oxide.

[0026] See also Figure 2 A catalytic component 11 is provided on the inner wall of the heating chamber 7, and an electric heating tube 9 is fixedly installed on the outer wall of the heating chamber 7 and located inside the shell 1. The electric heating tube 9 is spirally wound around the outer wall of the heating chamber 7. A fan 13 is fixedly installed inside the air intake chamber 8, and a preheating tube 10 is also fixedly installed between the air intake chamber 8 and the air intake chamber 6.

[0027] The electric heating tube 9 is spirally wound and distributed outside the heating chamber 7, thereby further improving the heating efficiency of the nitrogen oxide flue gas.

[0028] In addition, the catalytic component 11 is located on one side of the diversion pipe 4, so that the uniformly diverted nitrogen oxide flue gas has a wider area and is more evenly distributed when in contact with the catalytic component 11, thereby improving the efficiency of the catalytic reaction. After the reaction, a portion of the reacted nitrogen oxide gas will return to the interior of the air intake chamber 6 through the preheating tube 10 to preheat the subsequent nitrogen oxide flue gas inside the air intake chamber 6, thereby making the subsequent nitrogen oxide flue gas heat up faster, thereby further improving the conversion efficiency of the nitrogen compound converter.

[0029] It is worth noting that the fan 13 can accelerate the flow of nitrogen oxide gas inside the fixed pipe 2, and cooperate with the uniform distribution and uniform heating of the nitrogen oxide flue gas and the subsequent preheating of the nitrogen oxide flue gas, thereby ensuring the nitrogen oxide flue gas conversion effect inside the fixed pipe 2 while also improving the subsequent nitrogen oxide flue gas conversion efficiency.

[0030] In this embodiment, the preheating tube 10 is a one-way air pipe and also a hose. A temperature sensor 14 for detecting the temperature is fixedly installed on the inner wall of the heating chamber 7. A controller 15 is fixedly installed on the surface of the outer shell 1. The temperature sensor 14 is electrically connected to the controller 15 through a wire.

[0031] The controller 15 can display the temperature inside the fixed pipe 2 detected by the temperature sensor 14, so as to facilitate the staff to perform adjustment work.

[0032] In addition, the controller 15 may be a TC4S temperature controller, and its specific model may be adjusted according to usage requirements and is not specifically limited here.

[0033] In this embodiment, the catalytic assembly 11 includes a molybdenum mesh 1101 and a mounting ring 1102. The mounting ring 1102 is fixedly mounted on the inner wall of the heating chamber 7, and the molybdenum mesh 1101 is fixedly mounted on one side of the mounting ring 1102 by bolts.

[0034] Among them, when the molybdenum mesh 1101 acts as a catalyst and reacts with nitrogen oxides in the nitrogen oxide converter, it mainly converts nitrogen dioxide into nitrogen monoxide and oxygen. This is a prior art and will not be described in detail here.

[0035] In this embodiment, the connecting pipe 5 is located at a side of the fixed pipe 2 close to the fan 13 , and the diverter pipe 4 is located at a side of the fixed pipe 2 close to the catalytic assembly 11 .

[0036] See also Figure 1 In this embodiment, a tee 16 is fixedly installed on both sides of the shell 1, an outlet pipe 20 and an exhaust pipe 12 are fixedly installed on both ends of the left tee 16, an inlet pipe 17 and an intake pipe 18 are fixedly installed on both ends of the right tee 16, valves 21 are fixedly installed on the surfaces of the outlet pipe 20, the exhaust pipe 12, the inlet pipe 17 and the intake pipe 18, and dustproof plates 19 are fixedly installed on the ends of the exhaust pipe 12 and the intake pipe 18.

[0037] It is worth noting that, through the exhaust pipe 12 and the intake pipe 18, after the device is used, the external air can be sucked into the fixed pipe 2 to speed up the air flow inside, so that the temperature inside the fixed pipe 2 can be reduced more quickly.

[0038] In addition, the dustproof plate 19 is provided to prevent external dust from entering the interior of the fixed pipe 2.

[0039] See also Figure 1 and Figure 4 In this embodiment, the housing 1 further includes a first shell 101, a second shell 103 and two mounting plates 102. The two mounting plates 102 are respectively fixedly mounted with the first shell 101 and the second shell 103 on opposite sides. The two mounting plates 102 are fixedly mounted with bolts. The fixed pipe 2 further includes a first fixed pipe 201 and a second fixed pipe 202. A slot 203 is provided on a side of the second fixed pipe 202 close to the first fixed pipe 201. A sealing plate 204 extending into the slot 203 is fixedly mounted on a side of the first fixed pipe 201 close to the second fixed pipe 202.

[0040] Among them, by dividing the outer shell 1 and the fixing pipe 2 into two parts, that is, after the first shell 101 and the second fixing pipe 202 are disassembled by bolts, the molybdenum mesh 1101 can be easily disassembled and replaced.

[0041] In addition, by providing the slot 203 and the sealing plate 204 , wherein the sealing plate 204 is tightly fitted to the inner wall of the slot 203 , the sealing performance after the first fixed tube 201 and the second fixed tube 202 are connected is improved.

[0042] When this embodiment is in use, the nitrogen oxide flue gas is introduced into the interior of the air intake chamber 6 through the air intake pipe 17. When the nitrogen oxide flue gas passes through the fixed plate 3 on the right side, it will be diverted through the diverter pipe 4, so that the nitrogen oxide flue gas can evenly enter the interior of the heating chamber 7, and the electric heating tube 9 and the fan 13 are started. Since the electric heating tube 9 is spirally wound and distributed on the outside of the heating chamber 7, the heating efficiency of the nitrogen oxide flue gas can be greatly improved. At the same time, the catalytic component 11 is located on one side of the diverter pipe 4, so that the nitrogen oxide flue gas after uniform diversion has a wider area when in contact with the catalytic component 11, and the distribution is more uniform, thereby improving the catalytic reaction efficiency. After the reaction, a part of the reacted nitrogen oxide gas will return to the interior of the air intake chamber 6 through the preheating tube 10 to preheat the subsequent nitrogen oxide flue gas inside the air intake chamber 6, thereby making the subsequent nitrogen oxide flue gas heat up faster, thereby further improving the conversion efficiency of the nitrogen compound converter.

[0043] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0044] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A nitrogen oxide conversion device for flue gas detection, comprising a housing (1), characterized in that: A fixed pipe (2) is fixedly mounted on the inner wall of the housing (1), and two fixed plates (3) are fixedly mounted on the inner wall of the fixed pipe (2), a connecting pipe (5) is fixedly mounted on the surface of one of the fixed plates (3), and a plurality of flow dividers (4) are fixedly mounted on the surface of the other fixed plate (3), and the two fixed plates (3) divide the fixed pipe (2) into an air suction chamber (8) on the left, a heating chamber (7) in the middle, and an air intake chamber (6) on the right, wherein; The inner wall of the heating chamber (7) is provided with a catalytic component (11), the outer wall of the heating chamber (7) and the interior of the housing (1) are also fixedly installed with an electric heating tube (9), the electric heating tube (9) is spirally wound around the outer wall of the heating chamber (7), a fan (13) is fixedly installed inside the air intake chamber (8), and a preheating tube (10) is also fixedly installed between the air intake chamber (8) and the air intake chamber (6).

2. A nitrogen oxide conversion device for flue gas detection according to claim 1, characterized in that: The preheating tube (10) is a one-way air tube, and a temperature sensor (14) for detecting temperature is fixedly mounted on the inner wall of the heating chamber (7).

3. The nitrogen oxide conversion device for flue gas detection according to claim 1, characterized in that: The catalytic component (11) comprises a molybdenum mesh (1101) and a mounting ring (1102), wherein the mounting ring (1102) is fixedly mounted on the inner wall of the heating chamber (7), and the molybdenum mesh (1101) is fixedly mounted on one side of the mounting ring (1102) by means of bolts.

4. The nitrogen oxide conversion device for flue gas detection according to claim 1, characterized in that: The connecting pipe (5) is located on a side of the fixed pipe (2) close to the fan (13), and the diverter pipe (4) is located on a side of the fixed pipe (2) close to the catalytic component (11).

5. The nitrogen oxide conversion device for flue gas detection according to claim 2, characterized in that: A controller (15) is fixedly mounted on the surface of the housing (1), and the temperature sensor (14) is electrically connected to the controller (15) via a wire.

6. The nitrogen oxide conversion device for flue gas detection according to claim 1, characterized in that: A tee (16) is fixedly mounted on both sides of the housing (1); an air outlet pipe (20) and an exhaust pipe (12) are fixedly mounted on both ends of the left tee (16); an air inlet pipe (17) and an air suction pipe (18) are fixedly mounted on both ends of the right tee (16); valves (21) are fixedly mounted on the surfaces of the air outlet pipe (20), the exhaust pipe (12), the air inlet pipe (17) and the air suction pipe (18); and dustproof plates (19) are fixedly mounted on the ends of the exhaust pipe (12) and the air suction pipe (18).

7. The nitrogen oxide conversion device for flue gas detection according to claim 1, characterized in that: The housing (1) further comprises a first shell (101), a second shell (103) and two mounting plates (102), wherein the two mounting plates (102) are respectively fixedly mounted on opposite sides of the first shell (101) and the second shell (103), and the two mounting plates (102) are fixed to each other by bolts.

8. The nitrogen oxide conversion device for flue gas detection according to claim 1, characterized in that: The fixed pipe member (2) further comprises a first fixed pipe (201) and a second fixed pipe (202); a slot (203) is provided on a side of the second fixed pipe (202) close to the first fixed pipe (201); and a sealing plate (204) extending into the slot (203) is fixedly mounted on a side of the first fixed pipe (201) close to the second fixed pipe (202).

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