Device for cooling flue gas of metal sodium treatment

Abstract

The utility model discloses a kind of metal sodium treatment flue gas cooling device, it includes box;One end of U-shaped overflow pipe is communicated with the bottom of box, one end of back liquid pipe is sealed through the bottom surface of box, the other end of back liquid pipe extends to circulating liquid pool, the inlet of circulating liquid pump is communicated with circulating liquid pool by liquid inlet pipe, the outlet of circulating liquid pump is communicated with the spray pipe sealed into box, and spray pipe in box is connected with spray head on it. Advantage: the flue gas generated by metal sodium treatment room enters into box by import air pipe, the spray liquid extracted by circulating liquid pump is sent into spray pipe, then is sprayed into box by spray head, the flue gas entering into box from import air pipe is cooled and handled, and the flue gas after cooling is discharged to next process by export air pipe;Through the cooling device, not only the purpose of flue gas cooling can be effectively realized, but also the resistance of the device to flue gas passing through is smaller, which is beneficial to reduce the phenomenon of dust fouling and plugging.

Description

Technical fields:

[0001] This utility model relates to the technical field of sodium metal production equipment, and in particular to a device for cooling flue gas used in sodium metal treatment. Background technology:

[0002] During the production of metallic sodium, the flue gas generated in the metallic sodium processing chamber contains sodium fumes, which cannot be discharged to the outside and need to be purified. At the same time, the flue gas temperature is high, so it needs to be cooled before entering the purification system. Flue gas cooling is usually achieved by using waste heat boilers or Venturi cooling systems.

[0003] Waste heat boilers are shell and tube structures. During operation, flue gas passes through the heat exchange tubes and heats the water in the shell side to produce steam. However, in actual operation, the tube side is frequently blocked by sodium fume dust, requiring frequent manual cleaning, which is labor-intensive and affects normal operation.

[0004] When using a venturi cooling system, the amount of liquid injected into the venturi has a significant impact on the cooling effect. If the amount of liquid injected into the venturi is too small, the cooling effect will be poor. If the amount of liquid injected into the venturi is too large, the operating resistance of the venturi will be high, resulting in insufficient suction of the subsequent fan. Sodium fume and dust are prone to scale and blockage at the venturi throat. If dirt blockage occurs, the spray liquid will backflow into the treatment chamber along the flue gas duct, posing a risk of fire and explosion due to contact with metallic sodium. Utility model content:

[0005] The purpose of this invention is to provide a sodium metal flue gas cooling device that can cool flue gas and effectively prevent the risk of liquid return from the inlet duct.

[0006] This utility model is implemented by the following technical solution: a device for cooling flue gas used for treating metallic sodium, characterized in that it includes a support, a housing, an inlet duct, an outlet duct, a return pipe, a U-shaped overflow pipe, a circulating liquid pool, a circulating liquid pump, and a spray pipe; the support is fixed to the bottom of the housing, the air inlet end of the housing is connected to the inlet duct, and the air outlet end of the housing is connected to the outlet duct; one end of the U-shaped overflow pipe is connected to the bottom of the housing, and the other end of the U-shaped overflow pipe is higher than the bottom surface of the housing; one end of the return pipe is sealed through the bottom surface of the housing, and the other end of the return pipe extends into the circulating liquid pool; the inlet of the circulating liquid pump is connected to the circulating liquid pool through an inlet pipe, and the outlet of the circulating liquid pump is connected to the spray pipe that is sealed and extends into the housing; a spray nozzle is connected to the spray pipe inside the housing.

[0007] Furthermore, a box sight glass is installed on the box body, and a return sight glass is installed on the return pipe.

[0008] Furthermore, a pressure detector and a temperature detector are installed on the inlet duct. The pressure detector and the temperature detector are electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the circulating liquid pump.

[0009] The advantages of this invention are as follows: Under negative pressure, the flue gas generated in the sodium metal treatment chamber enters the chamber through the inlet duct. The spray liquid drawn by the circulating liquid pump is sent into the spray pipe and then sprayed into the chamber through the nozzle to cool the flue gas entering the chamber from the inlet duct. The cooled flue gas is then discharged to the next process through the outlet duct. This cooling device can not only effectively cool the flue gas, but also has low resistance to the passage of flue gas, which helps to reduce the occurrence of dust scaling and blockage.

[0010] The circulating liquid accumulated inside the tank can also overflow through one end of the U-shaped overflow pipe, effectively preventing the circulating liquid inside the tank from flowing back into the sodium metal treatment chamber through the inlet air duct due to poor return of liquid, which could lead to fire, explosion and other risks if it comes into contact with sodium metal. Attached image description:

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] The components in the attached diagram are labeled as follows: 1. Housing; 2. Support; 3. Inlet air duct; 4. Outlet air duct; 5. Spray pipe; 6. Nozzle; 7. Housing sight glass; 8. Return liquid pipe; 9. Return liquid sight glass; 10. U-shaped overflow pipe; 11. Circulating liquid tank; 12. Inlet liquid pipe; 13. Circulating liquid pump; 14. Pressure detector; 15. Temperature detector. Detailed implementation method:

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 As shown, this embodiment provides a cooling device for sodium metal treatment flue gas, which includes a support 2, a housing 1, an inlet duct 3, an outlet duct 4, a return pipe 8, a U-shaped overflow pipe 10, a circulating liquid pool 11, a circulating liquid pump 13, and a spray pipe 5; the support 2 is fixed at the bottom of the housing 1, the air inlet end of the housing 1 is connected to the inlet duct 3, and the air outlet end of the housing 1 is connected to the outlet duct 4; the flue gas generated in the sodium metal treatment chamber enters the housing 1 through the inlet duct 3 under negative pressure.

[0015] The inlet of the circulating liquid pump 13 is connected to the circulating liquid tank 11 through the inlet pipe 12, and the outlet of the circulating liquid pump 13 is connected to the spray pipe 5 that extends into the box 1. The spray pipe 5 in the box 1 is connected to the nozzle 6. The circulating liquid tank 11 contains spray liquid. The spray liquid drawn by the circulating liquid pump 13 is sent into the spray pipe 5 and then sprayed into the box 1 through the nozzle 6 to cool the flue gas entering the box 1 from the inlet air duct 3. The cooled flue gas is discharged to the next process through the outlet air duct 4.

[0016] This cooling device not only effectively cools the flue gas, but also provides less resistance to the passage of the flue gas, which helps reduce the occurrence of dust accumulation and blockage.

[0017] One end of the return pipe 8 is sealed and passes through the bottom surface of the box 1, is placed inside the box 1 and is higher than the bottom surface of the box 1, and the other end of the return pipe 8 extends into the circulating liquid pool 11. The liquid sprayed into the box 1 flows back into the circulating liquid pool 11 through the return pipe 8. The opening of the return pipe 8 extending into the bottom surface of the box 1 is higher than the bottom surface of the box 1, so that liquid remains on the bottom surface of the box 1, forming a liquid seal to prevent air from entering the box and affecting the normal circulation of flue gas.

[0018] One end of the U-shaped overflow pipe 10 is connected to the bottom of the box 1, and the other end of the U-shaped overflow pipe 10 is higher than the bottom surface of the box 1. The circulating liquid accumulated in the box 1 can also overflow through one end of the U-shaped overflow pipe 10, effectively preventing the circulating liquid in the box 1 from flowing back to the sodium metal treatment chamber through the inlet air duct 3 due to poor return of liquid, which could lead to fire, explosion and other risks upon contact with sodium metal. The outlet of the other end of the U-shaped overflow pipe 10 is higher than the bottom surface of the box 1, so that there is also circulating liquid in the U-shaped overflow pipe 10, preventing air from entering the box and affecting the normal flow of flue gas. The height of the outlet of the other end of the U-shaped overflow pipe 10 must be higher than the height of the pipe opening of the return pipe 8 into the box 1, ensuring that the circulating liquid in the box 1 is discharged through the return pipe 8 first. However, the outlet of the other end of the U-shaped overflow pipe 10 must not be higher than the height of the air inlet of the inlet air duct 3, to avoid the circulating liquid from flowing back from the inlet air duct 3 after accumulation.

[0019] A sight glass 7 is installed on the housing 1 to facilitate observation of the spraying situation inside the housing 1; a return liquid sight glass 9 is installed on the return liquid pipe 8 to facilitate observation of the return flow of the spray liquid inside the return liquid pipe 8. If any abnormality is found, the circulating liquid pump 13 should be stopped in time and cleaning and maintenance should be carried out.

[0020] A pressure sensor 14 and a temperature sensor 15 are installed on the inlet duct 3. The pressure sensor 14 and the temperature sensor 15 are electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the circulating liquid pump 13. The pressure sensor 14 and the temperature sensor 15 monitor the pressure and temperature inside the inlet duct 3 in real time and feed them back to the controller in real time. When the pressure monitored by the pressure sensor 14 reaches the set value, or when the temperature monitored by the temperature sensor 15 reaches the set value, the controller interlocks and controls the circulating liquid pump 13 to stop, so as to realize timely detection of abnormalities and timely shutdown, and reduce the risk of circulating liquid accumulating and flowing back from the inlet duct 3.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for cooling flue gas treated with metallic sodium, characterized in that, It includes a support frame, housing, inlet air duct, outlet air duct, return liquid pipe, U-shaped overflow pipe, circulating liquid tank, circulating liquid pump and spray pipe; The bracket is fixed to the bottom of the box, the air inlet end of the box is connected to the inlet air duct, and the air outlet end of the box is connected to the outlet air duct; one end of the U-shaped overflow pipe is connected to the bottom of the box, and the other end of the U-shaped overflow pipe is higher than the bottom surface of the box; One end of the return pipe is sealed through the bottom surface of the box, and the other end of the return pipe extends into the circulating liquid pool. The inlet of the circulating liquid pump is connected to the circulating liquid pool through the inlet pipe, and the outlet of the circulating liquid pump is connected to the spray pipe that is sealed and extends into the box. A spray head is connected to the spray pipe inside the box.

2. The sodium metal flue gas cooling device according to claim 1, characterized in that, A sight glass is installed on the housing, and a return liquid sight glass is installed on the return liquid pipe.

3. The sodium metal flue gas cooling device according to claim 1, characterized in that, A pressure detector and a temperature detector are installed on the inlet air duct. The pressure detector and the temperature detector are electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the circulating liquid pump.

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