Vacuum air exhaust system device special for mercury furnace

Abstract

The utility model relates to the technical field of vacuum metallurgy equipment, concretely relates to special vacuum air extraction system device of Hg furnace, including furnace body, the top of furnace body can detachably install the furnace cover, the fixed mounting of furnace cover has the gas pipe, the fixed mounting of gas pipe's end portion has first inclined pipe, the fixed mounting of first inclined pipe's end portion has the branch pipe, the fixed mounting of branch pipe's top end has second inclined pipe, the spiral heat exchange pipe for going in cooling medium and carrying out condensation operation is all set up in first inclined pipe and second inclined pipe, the fixed mounting of branch pipe's bottom end has condensed liquid pipe, the fixed mounting of second inclined pipe's end has the suction pipe, the fixed mounting of suction pipe's top end has vacuum pump, the fixed mounting of suction pipe's bottom end has mercury liquid collection box, the fixed mounting of condensed liquid pipe's end is in mercury liquid collection box. The utility model has the function of condensing and collecting mercury vapor, prolongs the service life of vacuum pump.

Description

Technical Field

[0001] This utility model relates to the field of vacuum metallurgical equipment technology, and more specifically, to a vacuum pumping system device for Hg furnaces. Background Technology

[0002] In mercury refining, mercury compound synthesis, and related scientific research experiments, Hg furnaces must operate in a closed vacuum environment. On the one hand, the vacuum environment can prevent mercury vapor from reacting with air to generate toxic impurities, ensuring product purity. On the other hand, it can prevent mercury vapor from leaking into the outside world, protecting the health of operators and environmental safety. As the core supporting equipment of the Hg furnace, the vacuum pumping system's pumping efficiency and mercury vapor condensation and recovery capabilities directly determine the operational safety and process stability of the Hg furnace.

[0003] Most existing vacuum pumping systems for Hg furnaces directly use vacuum pumps to extract steam to ensure vacuum and steam delivery. However, this process can lead to Hg vapor entering the pump body and corroding it. The lack of pre-installed components to condense the Hg vapor can affect the pump's lifespan.

[0004] Furthermore, many Hg furnace vacuum pumping systems employ a single straight-tube condenser structure, relying solely on natural heat dissipation from the tube wall or simple air cooling. This results in a small condensation area and low heat exchange efficiency. When the mercury vapor concentration inside the furnace is high, a large amount of mercury vapor enters the vacuum pump without being condensed, leading not only to mercury contamination inside the vacuum pump (requiring frequent disassembly and cleaning, resulting in high maintenance costs) but also the potential for safety accidents due to mercury vapor leakage. Therefore, we have proposed a dedicated vacuum pumping system for Hg furnaces. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum pumping system device specifically for Hg furnaces, in order to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vacuum pumping system for Hg furnaces includes a furnace body with a detachable furnace cover on top. A gas pipe is fixedly installed on the furnace cover, and a first inclined pipe is fixedly installed at the end of the gas pipe. A secondary pipe is fixedly installed at the end of the first inclined pipe, and a second inclined pipe is fixedly installed at the top of the secondary pipe. Both the first and second inclined pipes are equipped with spiral heat exchange tubes for introducing cooling medium for condensation. A condensate pipe is fixedly installed at the bottom of the secondary pipe, and a suction pipe is fixedly installed at the end of the second inclined pipe. A vacuum pump is fixedly installed at the top of the suction pipe, and a mercury collection tank is located at the bottom of the suction pipe. The end of the condensate pipe is fixedly installed on the mercury collection tank.

[0008] Preferably, a vent pipe is fixedly installed on the cylinder of the furnace body, and a first valve is fixedly installed on the vent pipe;

[0009] This feature allows for the introduction of gases such as nitrogen through the vent pipe when necessary, promoting the flow of internal steam.

[0010] Preferably, a condensate inlet pipe is fixedly installed at the bottom end of the spiral heat exchange tube, and a condensate outlet pipe is fixedly installed at the top end of the spiral heat exchange tube.

[0011] Preferably, the gas tube, the auxiliary tube, and the suction tube are all inclined upward at 45° to 60°, and the first inclined tube and the second inclined tube are both inclined downward at 45° to 90°.

[0012] This setting facilitates smoother gas flow and condensate flow.

[0013] Preferably, a first check valve is fixedly installed on the condensate pipe, and a second check valve is fixedly installed on the bottom end of the suction pipe.

[0014] This setting ensures that the pipeline allows liquid to flow in only one direction.

[0015] Preferably, the vacuum pump has an exhaust pipe fixedly installed at its outlet end, and the exhaust pipe is connected to an external waste gas treatment device.

[0016] Preferably, a plurality of support pads are fixedly installed at the bottom of the mercury collection tank, an external pipe is fixedly installed on the bottom of the mercury collection tank, and a second valve is fixedly installed on the external pipe;

[0017] This feature allows the mercury in the mercury collection tank to be discharged outwards through the external tube.

[0018] Preferably, a pressure relief pipe is fixedly installed on the top surface of the mercury collection tank, and a manual valve is fixedly installed on the pressure relief pipe;

[0019] This setting allows for pressure relief when needed.

[0020] Preferably, an observation tube is fixedly installed on the front side of the mercury collection tank, and a transparent observation window is connected to the front side of the observation tube via a flange.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model uses spiral heat exchange tubes inside the first and second inclined tubes as a pre-condensation component to cool the mercury vapor discharged from the furnace body, preventing the mercury vapor from directly entering the vacuum pump. At the same time, the inclined pipe design of the gas pipe and auxiliary pipe allows the condensed mercury liquid to flow smoothly into the mercury liquid collection tank, thereby protecting the vacuum pump, preventing pump body corrosion, and extending the service life of the vacuum pump.

[0023] 2. This utility model increases the contact area between the cooling medium and mercury vapor by using a spiral heat exchange tube with a spiral structure, replacing the traditional single straight tube condensation structure and improving heat exchange efficiency; at the same time, the downward tilting of the first and second inclined tubes accelerates the flow of condensed mercury liquid and reduces residue.

[0024] 3. This utility model, by setting an observation tube and a transparent observation window in the mercury collection box, can monitor the mercury collection volume in real time, and conveniently discharge the mercury with the help of an external pipe and a second valve; at the same time, the exhaust pipe is connected to the waste gas treatment equipment and the pressure relief pipe for easy pressure relief, realizing visualization of the system operation status and convenient operation and maintenance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0027] Figure 3 This is the second partial structural schematic diagram of the present utility model;

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Furnace body; 10. Vent pipe; 11. First valve; 12. Furnace cover;

[0030] 2. Gas pipe; 20. First inclined pipe; 21. Secondary pipe; 22. Condensate pipe; 221. First check valve; 23. Second inclined pipe; 24. Spiral heat exchanger pipe; 241. Condensate inlet pipe; 242. Condensate outlet pipe; 25. Suction pipe; 251. Second check valve; 26. Vacuum pump; 261. Exhaust pipe; 27. Mercury collection tank; 271. Support pad; 272. Pressure relief pipe; 273. Manual valve; 28. External pipe; 281. Second valve; 29. ​​Observation tube; 291. Transparent observation window. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0032] Please see Figures 1-3 This utility model provides a technical solution: a vacuum pumping system device for Hg furnaces, including a furnace body 1, a furnace cover 12 detachably installed on the top of the furnace body 1, a gas pipe 2 fixedly installed on the furnace cover 12, a first inclined pipe 20 fixedly installed at the end of the gas pipe 2, a secondary pipe 21 fixedly installed at the end of the first inclined pipe 20, a second inclined pipe 23 fixedly installed at the top of the secondary pipe 21, a spiral heat exchange tube 24 for introducing cooling medium for condensation operation in both the first inclined pipe 20 and the second inclined pipe 23, a condensate pipe 22 fixedly installed at the bottom of the secondary pipe 21, a suction pipe 25 fixedly installed at the end of the second inclined pipe 23, a vacuum pump 26 fixedly installed at the top of the suction pipe 25, a mercury liquid collection tank 27 installed at the bottom of the suction pipe 25, and the end of the condensate pipe 22 fixedly installed on the mercury liquid collection tank 27, realizing the condensation operation of mercury vapor. At the same time, the continuous operation of the vacuum pump 26 can ensure that the internal environment is a vacuum environment, achieving the effect of vacuum pumping.

[0033] like Figure 1 As shown, a vent pipe 10 is fixedly installed on the cylinder of the furnace body 1, and a first valve 11 is fixedly installed on the vent pipe 10. When necessary, the first valve 11 can be opened to introduce inert gases such as nitrogen through the vent pipe 10, which will push the mercury vapor in the furnace body 1 to flow to the gas pipe 2, thereby preventing the mercury vapor from stagnating in the furnace and allowing the mercury vapor to enter the condensation stage more efficiently.

[0034] like Figure 1 As shown, a condensing medium inlet pipe 241 is fixedly installed at the bottom end of the spiral heat exchange tube 24, and a condensing medium outlet pipe 242 is fixedly installed at the top end of the spiral heat exchange tube 24. The cooling medium can enter the spiral heat exchange tube 24 from the condensing medium inlet pipe 241, and after fully flowing through the spiral structure, it is discharged from the condensing medium outlet pipe 242, ensuring that the cooling medium and mercury vapor can fully exchange heat and improve the condensation efficiency.

[0035] In this embodiment, the gas pipe 2, the secondary pipe 21, and the suction pipe 25 are all inclined upwards at 45° to 60°, while the first inclined pipe 20 and the second inclined pipe 23 are both inclined downwards at 45° to 90°. The upwardly inclined pipes help the mercury vapor flow smoothly, while the downwardly inclined pipes accelerate the downward flow of the condensed mercury liquid, so that the gas flow and the condensate flow do not obstruct each other, thus improving the smoothness of system operation.

[0036] like Figure 1 As shown, a first one-way valve 221 is fixedly installed on the condensate pipe 22, and a second one-way valve 251 is fixedly installed on the bottom end of the suction pipe 25. The first one-way valve 221 prevents mercury from flowing back from the mercury collection tank 27 to the secondary pipe 21, and the second one-way valve 251 prevents mercury from flowing back into the upper part of the suction pipe 25, ensuring that the liquid in the pipe flows only in the preset direction and preventing backflow contamination.

[0037] Specifically, an exhaust pipe 261 is fixedly installed at the outlet end of the vacuum pump 26. The exhaust pipe 261 is connected to the external waste gas treatment equipment. The trace amount of residual waste gas discharged by the vacuum pump 26 can directly enter the treatment equipment, avoiding the emission of untreated gas into the environment, meeting environmental protection requirements, and protecting the health of operators.

[0038] like Figure 2 As shown, multiple support blocks 271 are fixedly installed at the bottom of the mercury collection tank 27. An external pipe 28 is fixedly installed on the bottom of the mercury collection tank 27, and a second valve 281 is fixedly installed on the external pipe 28. The support blocks 271 elevate the mercury collection tank 27 to prevent the bottom of the tank from directly contacting the ground and becoming damp and corroded. With the external pipe 28 and the second valve 281 at the bottom, opening the second valve 281 allows the mercury in the tank to be discharged along the external pipe 28, facilitating the recycling and reuse of the mercury.

[0039] like Figure 2 As shown, a pressure relief pipe 272 is fixedly installed on the top surface of the mercury collection tank 27, and a manual valve 273 is fixedly installed on the pressure relief pipe 272. When the pressure inside the tank fluctuates due to temperature changes or operation, the manual valve 273 can be opened to release excess pressure through the pressure relief pipe 272, preventing the mercury collection tank 27 from being damaged due to excessive pressure and ensuring equipment safety.

[0040] like Figure 2 and Figure 3 As shown, an observation tube 29 is fixedly installed on the front side of the mercury collection tank 27. A transparent observation window 291 is connected to the flange on the front side of the observation tube 29. The operator can observe the mercury level in the tank in real time through the transparent observation window 291. The collection situation can be grasped without opening the tank, avoiding the risk of mercury vapor leakage, and at the same time, it is convenient to arrange mercury discharge operations in a timely manner.

[0041] Finally, it should be noted that the vacuum pump 26, the corresponding control system, and the external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0042] When using the Hg furnace-specific vacuum pumping system of this utility model, close the first valve 11, the second valve 281 and the manual valve 273, introduce the cooling medium through the condensing medium inlet pipe 241 of the spiral heat exchange tube 24, confirm that the cooling medium flows out normally from the condensing medium outlet pipe 242, and complete the system start-up preparation.

[0043] The vacuum pump 26 is started, and the furnace body 1 is evacuated through the suction pipe 25; the mercury vapor in the furnace enters the first inclined pipe 20 through the gas pipe 2, and is condensed into liquid mercury by the spiral heat exchange pipe 24. The liquid mercury flows into the liquid mercury collection tank 27 along the first inclined pipe 20, the secondary pipe 21, and the condensate pipe 22; the mercury vapor that is not completely condensed is condensed again through the second inclined pipe 23, and the liquid mercury flows into the collection tank from the bottom of the suction pipe 25. The residual waste gas enters the waste gas treatment equipment through the exhaust pipe 261.

[0044] The mercury level is observed through the transparent observation window 291 of the observation tube 29. After the manual valve 273 is opened to release pressure, the second valve 281 is opened, and the mercury is discharged and recovered from the external pipe 28.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum pumping system for Hg furnaces, comprising a furnace body (1), characterized in that: A furnace cover (12) is detachably installed on the top of the furnace body (1). A gas pipe (2) is fixedly installed on the furnace cover (12). A first inclined pipe (20) is fixedly installed at the end of the gas pipe (2). A secondary pipe (21) is fixedly installed at the end of the first inclined pipe (20). A second inclined pipe (23) is fixedly installed at the top of the secondary pipe (21). A spiral heat exchanger (24) for introducing cooling medium for condensation is provided in both the first inclined pipe (20) and the second inclined pipe (23). A condensate pipe (22) is fixedly installed at the bottom of the secondary pipe (21). A suction pipe (25) is fixedly installed at the end of the second inclined pipe (23). A vacuum pump (26) is fixedly installed at the top of the suction pipe (25). A mercury collection tank (27) is provided at the bottom of the suction pipe (25). The end of the condensate pipe (22) is fixedly installed on the mercury collection tank (27).

2. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: A vent pipe (10) is fixedly installed on the cylinder of the furnace body (1), and a first valve (11) is fixedly installed on the vent pipe (10).

3. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: A condensing medium inlet pipe (241) is fixedly installed at the bottom end of the spiral heat exchange tube (24), and a condensing medium outlet pipe (242) is fixedly installed at the top end of the spiral heat exchange tube (24).

4. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: The gas tube (2), the secondary tube (21) and the suction tube (25) are all inclined upward at 45°~60°, and the first inclined tube (20) and the second inclined tube (23) are both inclined downward at 45°~90°.

5. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: A first check valve (221) is fixedly installed on the condensate pipe (22), and a second check valve (251) is fixedly installed on the bottom end of the suction pipe (25).

6. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: The vacuum pump (26) is fixedly equipped with an exhaust pipe (261) at its outlet end, and the exhaust pipe (261) is connected to an external waste gas treatment device.

7. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: The bottom of the mercury collection tank (27) is fixedly equipped with multiple support pads (271), and an external pipe (28) is fixedly installed on the bottom of the mercury collection tank (27). A second valve (281) is fixedly installed on the external pipe (28).

8. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: A pressure relief pipe (272) is fixedly installed on the top surface of the mercury collection tank (27), and a manual valve (273) is fixedly installed on the pressure relief pipe (272).

9. The vacuum pumping system device for Hg furnaces according to claim 1, characterized in that: An observation tube (29) is fixedly installed on the front side of the mercury collection box (27), and a transparent observation window (291) is connected to the flange on the front side of the observation tube (29).

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