Nitric acid detection exhaust device based on Internet of Things control

Abstract

The utility model provides a nitric acid detection exhaust device based on internet of things control, which relates to the field of nitric acid detection exhaust and comprises a nitric acid absorption machine body, an exhaust hood and an air inlet hood, the exhaust hood is welded at the upper left end of the nitric acid absorption machine body, and the air inlet hood is welded at the right end of the nitric acid absorption machine body. A first nitric acid detector is embedded in the inner wall of the upper end of the exhaust hood, an exhaust fan is installed on the inner wall of the exhaust hood, an exhaust pipe is connected to the left end of the exhaust hood, the lower end of the exhaust hood communicates with an inner cavity of the nitric acid absorption machine body through a backflow pipeline, and electric valves are installed on the surfaces of the exhaust pipe and the backflow pipeline correspondingly; the electric valve is electrically connected with an Internet of Things control cabinet, the left side of the air inlet cover communicates with an air inlet pipe of the nitric acid absorption machine body through an air guide cavity, and an exhaust fan is installed on the right side of the air guide cavity. According to the utility model, the problem of waste caused by excessive pesticide spraying amount of the pesticide feeding mechanism when the content of toxic gas in the exhaust device is low in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitric acid detection and exhaust technology, in particular to a nitric acid detection and exhaust device based on Internet of Things control. Background Art

[0002] Nitric acid is a strong acid with strong oxidizing and corrosive properties. It is a colorless, transparent liquid that is volatile and easily miscible with water. Nitric acid is widely used in industry, including in the manufacture of fertilizers, dyes, explosives, nitrates, and other chemicals. To prevent the harmful odor of nitric acid volatilization, it is necessary to detect it. When detected, an exhaust device is used to remove the odor. A search revealed prior art (Announcement No.: CN202111185586.X) for an exhaust device used in a chemical storage room. The document describes a "dosing mechanism, on the one hand, activates a motor to cause a reciprocating assembly to drive a pull rod in reciprocating motion, causing a slider at the front end of the pull rod to slide within a drug delivery tube, squeezing the drug through a one-way nozzle and spraying it into an exhaust duct. The sprayed drug reacts with toxic gases in the exhaust duct, converting it into a non-toxic gas. Furthermore, the drug storage hopper can be refilled by opening the drug storage hopper lid." However, this prior art suffers from the problem of excessive drug spraying by the dosing mechanism when the toxic gas content in the exhaust device is low, resulting in waste. Utility Model Content

[0003] In order to overcome the defects of the existing technology, a nitric acid detection and exhaust device based on Internet of Things control is provided to solve the problem of excessive waste of spraying dosage of the dosing mechanism when the toxic gas content in the exhaust device is low in the existing technology.

[0004] To achieve the above object, a nitric acid detection and exhaust device based on Internet of Things control is provided, comprising: a nitric acid absorption body, an exhaust hood and an air inlet hood, wherein the exhaust hood is welded to the upper left end of the nitric acid absorption body, and the air inlet hood is welded to the right end of the nitric acid absorption body.

[0005] A first nitric acid detector is embedded in the inner wall of the upper end of the exhaust hood, an exhaust fan is installed on the inner wall of the exhaust hood, an exhaust pipe is connected to the left end of the exhaust hood, and the lower end of the exhaust hood is connected to the inner cavity of the nitric acid absorption body through a reflux pipe. Electric valves are installed on the surfaces of the exhaust pipe and the reflux pipe, and the electric valves are electrically connected to the Internet of Things control cabinet. The left side of the air inlet hood is connected to the air inlet pipe of the nitric acid absorption body through an air guide cavity, and an exhaust fan is installed on the right side of the air guide cavity.

[0006] Furthermore, a liquid storage tank is fixed in the middle of the upper surface of the nitric acid absorption body; and sodium hydroxide solution is stored in the liquid storage tank, and the lower end of the liquid storage tank is connected to the inner cavity of the nitric acid absorption body through a drain pipe.

[0007] Furthermore, two groups of liquid level sensors are installed on the rear cavity wall of the nitric acid absorption body, and a sealing plug plate is screwed and pressed on the left end of the nitric acid absorption body.

[0008] Furthermore, an Internet of Things control cabinet is fixed on the front surface of the nitric acid absorption body, and a connecting slot is opened on the lower end surface of the exhaust hood; and the connecting slot is connected to the inner cavity of the nitric acid absorption body.

[0009] Furthermore, a second nitric acid detector is embedded in the inner side of the air inlet hood; and the second nitric acid detector is located on the right side of the exhaust fan.

[0010] Furthermore, a rubber plug is provided at the right side opening of the air guide cavity, and an electric push rod is connected to the front end of the rubber plug.

[0011] Furthermore, the lower ends of the reflux pipe and the air inlet pipe are both inserted into the solution in the nitric acid absorption body cavity.

[0012] The beneficial effect of the utility model is that the nitric acid detection and exhaust device based on Internet of Things control of the utility model uses the second nitric acid detector at the air inlet hood to detect nitric acid gas, and discharges the pumped gas into the sodium hydroxide solution in the nitric acid absorption body, so that the gas that has absorbed the nitric acid is discharged through the exhaust hood, which is convenient for the exhaust device to efficiently detect and absorb the nitric acid gas in the room, and reduce the loss of the reaction absorption solution. The first nitric acid detector in the exhaust hood monitors whether there is residual nitric acid gas in the gas after the reaction, and controls the exhaust path of the gas in the exhaust hood. When there is residual nitric acid gas, it is refluxed into the nitric acid absorption body to react again, ensuring the harmlessness of the exhaust gas after the reaction, and improving the exhaust purification effect of the nitric acid detection and exhaust device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front structural schematic diagram of a nitric acid detection and exhaust device based on Internet of Things control according to an embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the front cross-sectional structure of a nitric acid detection and exhaust device based on Internet of Things control according to an embodiment of the present utility model.

[0015] Figure 3 This is a schematic cross-sectional view of the exhaust hood according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic cross-sectional view of the air inlet cover according to an embodiment of the present invention.

[0017] In the figure: 1. Nitric acid absorption body; 11. Sealing plug plate; 12. Liquid level sensor; 13. Air inlet pipe; 2. Exhaust hood; 21. Exhaust pipe; 22. First nitric acid detector; 23. Exhaust fan; 24. Return pipe; 25. Electric valve; 26. Connecting notch; 3. Liquid storage tank; 31. Discharge pipe; 4. Air inlet hood; 41. Second nitric acid detector; 42. Electric push rod; 43. Exhaust fan; 44. Air guide chamber; 45. Rubber plug; 5. Internet of Things control cabinet. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 4 As shown, the utility model provides a nitric acid detection and exhaust device based on Internet of Things control, comprising: a nitric acid absorption body 1, an exhaust hood 2 and an air inlet hood 4. The exhaust hood 2 is welded to the upper left end of the nitric acid absorption body 1, and the air inlet hood 4 is welded to the right end of the nitric acid absorption body 1.

[0019] A first nitric acid detector 22 is embedded in the inner wall of the upper end of the exhaust hood 2, an exhaust fan 23 is installed on the inner wall of the exhaust hood 2, an exhaust pipe 21 is connected to the left end of the exhaust hood 2, and the lower end of the exhaust hood 2 is connected to the inner cavity of the nitric acid absorption body 1 through a reflux pipe 24. Electric valves 25 are installed on the surface of the exhaust pipe 21 and the reflux pipe 24, and the electric valve 25 is electrically connected to the Internet of Things control cabinet 5. The left side of the air inlet hood 4 is connected to the air inlet pipe 13 of the nitric acid absorption body 1 through an air guide cavity 44, and an exhaust fan 43 is installed on the right side of the air guide cavity 44.

[0020] When the second nitric acid detector 41 at the air inlet hood 4 detects that the concentration of nitric acid in the air is too high, the exhaust fan 43 is turned on, so that the exhaust fan 43 transports the indoor air into the air inlet pipe 13, and then reacts with the sodium hydroxide solution in the nitric acid absorption body 1 through the air inlet pipe 13. The reacted gas enters the exhaust hood 2 through the exhaust fan 23. When the first nitric acid detector 22 detects that there is no nitric acid residue, the valve is opened to discharge it from the exhaust pipe 21. When residual nitric acid is detected, the surface valve of the reflux pipe 24 is opened, so that the reflux pipe 24 discharges the current gas into the nitric acid absorption body 1 again for secondary reaction before discharging it.

[0021] In this embodiment, a liquid storage tank 3 is fixed to the middle of the upper surface of the nitric acid absorber 1. This tank contains sodium hydroxide solution, and its lower end is connected to the inner cavity of the nitric acid absorber 1 via a drain pipe 31. Two sets of liquid level sensors 12 are mounted on the rear wall of the nitric acid absorber 1. A sealing plug plate 11 is screwed and pressed against the left end of the nitric acid absorber 1.

[0022] As a preferred embodiment, the liquid storage tank 3 automatically replenishes the sodium hydroxide solution based on the liquid level value detected by the liquid level sensor 12. The two sets of liquid level sensors 12 are the highest and lowest liquid level values. Opening the sealing plug plate 11 facilitates the cleaning of the precipitate produced by the reaction.

[0023] In this embodiment, an Internet of Things control cabinet 5 is fixed to the front surface of the nitric acid absorption body 1, and a communication slot 26 is opened on the lower end surface of the exhaust hood 2; and the communication slot 26 is connected to the inner cavity of the nitric acid absorption body 1.

[0024] As a preferred embodiment, the IoT control cabinet 5 is used to control the electrical equipment and nitric acid concentration detection values in the entire air intake, reaction absorption and exhaust process, and can remotely control and monitor the working status of the exhaust device. The connecting slot 26 circulates the reacted gas into the exhaust hood 2.

[0025] In this embodiment, a second nitric acid detector 41 is embedded in the inner side of the air inlet cover 4 and is located to the right of the exhaust fan 43. A rubber plug 45 blocks the right opening of the air guide cavity 44, and an electric push rod 42 is connected to the front end of the rubber plug 45.

[0026] As a preferred embodiment, the second nitric acid detector 41 is convenient for detecting the nitric acid concentration in the air entering the air inlet hood 4. When the nitric acid concentration in the air is high in the normal range, the air guide cavity 44 is opened to react with the incoming air to remove nitric acid gas.

[0027] In this embodiment, the lower ends of the reflux pipe 24 and the air inlet pipe 13 are both inserted into the solution in the cavity of the nitric acid absorption body 1 .

[0028] As a preferred embodiment, the reflux pipe 24 and the air inlet pipe 13 inserted into the solution in the cavity of the nitric acid absorption body 1 facilitate the introduction of gas into the sodium hydroxide solution, so that the volatilized nitric acid gas reacts fully with the nitric acid, thereby removing the nitric acid gas in the air.

[0029] The nitric acid detection and exhaust device based on Internet of Things control of the utility model can effectively solve the problem of excessive waste of spraying dosage of the dosing mechanism when the toxic gas content in the exhaust device is low in the prior art, facilitates the exhaust device to efficiently detect and absorb nitric acid gas in the room, reduces the loss of reaction absorption solution, ensures the harmlessness of the exhaust gas after the reaction, improves the exhaust purification effect of the nitric acid detection and exhaust device, and is suitable for nitric acid detection and exhaust devices based on Internet of Things control.

Claims

1. A nitric acid detection and exhaust device based on IoT control, including: The nitric acid absorption body (1), the exhaust hood (2) and the air inlet hood (4), wherein the exhaust hood (2) is welded to the upper left end of the nitric acid absorption body (1), and the air inlet hood (4) is welded to the right end of the nitric acid absorption body (1), and is characterized in that: A first nitric acid detector (22) is embedded in the inner wall of the upper end of the exhaust hood (2), an exhaust fan (23) is installed on the inner wall of the exhaust hood (2), an exhaust pipe (21) is connected to the left end of the exhaust hood (2), and the lower end of the exhaust hood (2) is connected to the inner cavity of the nitric acid absorption body (1) through a return pipe (24). Electric valves (25) are installed on the surfaces of the exhaust pipe (21) and the return pipe (24), and the electric valves (25) are electrically connected to the Internet of Things control cabinet (5). The left side of the air inlet hood (4) is connected to the air inlet pipe (13) of the nitric acid absorption body (1) through an air guide cavity (44), and an exhaust fan (43) is installed on the right side of the air guide cavity (44).

2. the nitric acid detection exhaust device based on Internet of Things control according to claim 1, is characterized in that, A liquid storage tank (3) is fixed in the middle of the upper surface of the nitric acid absorption body (1); sodium hydroxide solution is stored in the liquid storage tank (3); and the lower end of the liquid storage tank (3) is connected to the inner cavity of the nitric acid absorption body (1) through a liquid discharge pipe (31).

3. the nitric acid detection exhaust device based on Internet of Things control according to claim 1, is characterized in that, Two groups of liquid level sensors (12) are installed on the rear cavity wall of the nitric acid absorption body (1), and a sealing plug plate (11) is screwed and pressed on the left end of the nitric acid absorption body (1).

4. the nitric acid detection exhaust device based on Internet of Things control according to claim 1, is characterized in that, An Internet of Things control cabinet (5) is fixed on the front surface of the nitric acid absorption body (1), and a communication slot (26) is provided on the lower end surface of the exhaust hood (2); and the communication slot (26) is communicated with the inner cavity of the nitric acid absorption body (1).

5. the nitric acid detection exhaust device based on Internet of Things control according to claim 1, is characterized in that, A second nitric acid detector (41) is embedded and installed inside the air inlet cover (4); and the second nitric acid detector (41) is located on the right side of the exhaust fan (43).

6. the nitric acid detection exhaust device based on Internet of Things control according to claim 1, is characterized in that, The right side opening of the air guide cavity (44) is blocked by a rubber plug (45), and the front end of the rubber plug (45) is connected to an electric push rod (42).

7. The nitric acid detection exhaust device based on Internet of Things control according to claim 1, wherein The lower ends of the reflux pipe (24) and the air inlet pipe (13) are both inserted into the solution in the cavity of the nitric acid absorption body (1).

Images