Demister

Abstract

The utility model relates to a kind of defoaming dust collector, including vertical outer shell body, the lower end of this shell body has the conical head for collecting sediment, at least one slag discharge port is equipped in the side of this conical head, the bottom of this conical head is equipped with the gas inlet for conveying gas into shell body, inner layer lift pipe is equipped in the cavity of lower end of this shell body, the lower end of this inner layer lift pipe is connected with gas inlet, the upper end outer side cover is opened at lower end, the upper end is closed baffle settling bell jar;Filter element is equipped in the cavity of upper end of shell body, the inner tube of filter element is connected with the gas outlet of top of shell body.The utility model gas enters shell body from lower end, and through twice bending and once filtering process, continuously realize the cooling, solidification, settlement, filtration, collection etc. of entrained liquid foam, to effectively achieve the purpose of gas-solid separation, maximum limit complete gas initial purification, not only can solve the problem of liquid foam entrainment blockage, also greatly reduce the difficulty of depth purification purification in rear end.

Description

Technical Field

[0001] This utility model belongs to the field of gas purification technology, specifically relating to a defoaming and dust removal device. Background Technology

[0002] In the continuous industrial production of fluorine, the entrainment of electrolyte droplets often causes pipeline blockage and product contamination, leading to production interruptions and pollution, which increases the cost of fluorine production. There is an urgent need for a device that can purify and enhance fluorine and remove entrained substances in order to maintain the cleanliness and continuous operation of fluorine transmission pipelines. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a defoaming and dust removal device that can remove solid impurities such as electrolyte droplets carried in fluorine gas, thereby achieving primary purification and upgrading of fluorine gas and maintaining the cleanliness and continuous operation of fluorine gas transmission pipelines.

[0004] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. According to this utility model, a defoaming and dust removal device includes a vertical outer shell. The lower end of the outer shell has a conical end cap for collecting sediment. At least one slag discharge port is provided on the side of the conical end cap. An air inlet for supplying gas into the outer shell is provided at the bottom of the conical end cap. An inner air riser pipe is provided in the lower cavity of the outer shell, with its lower end connected to the air inlet. A baffle settling bell jar, open at the bottom and closed at the top, covers the upper outer side of the inner shell. A filter element is provided in the upper cavity of the outer shell, with its inner tube connected to the air outlet at the top of the outer shell.

[0005] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0006] In the aforementioned demister and dust collector, the air inlet extends outward from the bottom of the conical head along the axial direction of the outer shell, and a flange is formed at the end for connection with the outlet pipe of the electrolytic cell.

[0007] In the aforementioned defogging and dust removal device, the inner air riser, the baffle settling bell jar, and the outer shell are coaxially spaced from the inside out.

[0008] In the aforementioned demister and dust collector, the axial extension length of the inner air riser pipe meets the requirement that the temperature of the gas discharged at its end outlet is below 70 degrees Celsius.

[0009] In the aforementioned demister and dust collector, the slag discharge ports are evenly distributed along the outer periphery of the conical end cap.

[0010] In the aforementioned demister and dust collector, the inner diameter of the baffle settling bell jar is 3-10 times the inner diameter of the inner air riser, and its length is 1 / 4-1 / 2 of the length of the inner air riser.

[0011] In the aforementioned demister and dust collector, the filter element is made of a high-nickel alloy or pure nickel material that is resistant to fluorine gas corrosion.

[0012] In the aforementioned defoaming and dust removal device, the inner wall of the baffle settling bell jar is connected and fixed to the outer wall of the inner air riser pipe via a connecting plate.

[0013] The aforementioned demister and dust collector has an open top housing with a removable disassembly flange removably covering the top of the housing. The removable disassembly flange includes an upper flange for connecting to a fluorine gas delivery pipeline, a lower flange for connecting to the housing, and a gas delivery pipeline connecting the upper flange and the lower flange, wherein the gas delivery pipeline communicates with the gas outlet.

[0014] The aforementioned demister and dust collector uses pure metal seals that are resistant to corrosion from corrosive gases at all points.

[0015] Compared with the prior art, this utility model has significant advantages and beneficial effects. Through the above technical solution, this utility model achieves considerable technological advancement and practicality, and has broad industrial application value. It possesses at least the following advantages: This utility model of a defoaming and dust removal device is a multi-layered, concentric ring-shaped structure, consisting of four parts: an inner central air inlet pipe, a middle baffle settling bell jar, an outer conical collection and slag discharge head, and a dust filter element. Gas enters from the bottom and undergoes two bends and one filtration process, continuously achieving cooling, solidification, settling, filtration, and collection of entrained liquid droplets. This effectively achieves gas-solid separation, maximizing initial gas purification. It not only solves the problem of liquid droplet entrainment and blockage but also significantly reduces the difficulty of subsequent deep purification. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the defoaming and dust removal device of this utility model.

[0017] [Explanation of Key Component Symbols] 1: Outer shell 2: Baffle settling bell jar 3: Inner riser pipe 4: Filter element 5: Detachable and disassembly flange Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended purpose of the invention, the following detailed description of the specific implementation method, structure, features and effects of the demister dust collector proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Please see Figure 1The diagram shows the structure of the demister and dust collector of this utility model. The demister and dust collector includes a vertical cylindrical outer shell 1. The lower end of the cylindrical outer shell 1 has a conical end cap with a radial dimension that gradually narrows from top to bottom. The conical end cap is used to collect electrolyte particles and dust. Its conical structure design facilitates more thorough cleaning in the later stages.

[0020] At least one slag discharge port 6 is provided on the lower outer periphery of the conical head for discharging the material accumulated inside the conical head. In this embodiment of the invention, there are two slag discharge ports 6, namely slag discharge port c1 and slag discharge port c2, which are symmetrically distributed on both sides of the conical head. Both slag discharge ports c1 and c2 can be connected to external valves and return pipes to the electrolytic cell to enable the reuse of the collected liquid electrolyte and reduce the hassle of disassembly and cleaning. In other embodiments of the invention, the slag discharge ports 6 can also be blind-plugged with flange covers and periodically disassembled for cleaning. Multiple slag discharge ports 6 can be provided, evenly distributed along the circumference of the conical head to ensure thorough cleaning of solid deposits in different locations.

[0021] The upper part of the cavity of the outer shell 1 is provided with a filter element 4 for gas dust removal. The inner tube of the filter element 4 is connected to the air outlet b at the top of the outer shell 1, so that the gas is filtered by the filter element 4 and discharged from the air outlet b.

[0022] The lower part of the cavity of the outer shell 1 is provided with an inner gas riser pipe 3, which extends vertically and its lower end is connected to an air inlet a located at the bottom of the conical head. The air inlet a is located outside the outer shell 1, and its inlet end is used to connect to the gas outlet pipe of the electrolytic cell, while its outlet end is connected to the lower end of the inner gas riser pipe 3. Preferably, the inlet end of the air inlet a is provided with a flange for easy connection to the gas outlet pipe of the electrolytic cell, but this is not a limitation.

[0023] The axial extension length of the inner layer riser pipe 3 meets the requirement that the temperature of the gas discharged at its end outlet is below 70 degrees Celsius, so that the temperature of the fluorine gas discharged from the inner layer riser pipe 3 is below 70 degrees Celsius, while the condensation and solidification temperature of the electrolyte droplets carried in the fluorine gas is about 70 degrees Celsius. The gas pre-cooled by the inner layer riser pipe 3 can achieve the effect of rapid cooling and sedimentation.

[0024] The upper outer periphery of the inner layer riser pipe 3 is covered by a baffle settling bell jar 2, which is open at the bottom and closed at the top. After the gas is discharged from the inner layer riser pipe 3, it is blocked and deflected by the baffle settling bell jar 2, causing it to move downwards along the baffle settling bell jar 2. During the movement, it is cooled and settled. Finally, the gas, after settling and removing electrolyte particles, flows out from below the baffle settling bell jar 2 and flows upwards through the space between the baffle settling bell jar 2 and the outer shell 1. Then, it is filtered and dust-removed by the filter element 4 and discharged from the outlet b. In this embodiment of the present invention, the inner diameter of the baffle settling bell jar 2 is approximately 3-10 times the inner diameter of the inner layer riser pipe 3, and its length is 1 / 4-1 / 2 of the length of the inner layer riser pipe 3, to ensure a sufficiently low gas flow velocity and a sufficiently long cooling and settling time.

[0025] In this embodiment, the baffle settling bell jar 2 is positioned higher than the conical end cap to prevent the material from being carried up again after settling. Preferably, the upper inner wall of the baffle settling bell jar 2 is connected and fixed to the outer wall of the inner air riser 3 via a connecting plate, thus forming a support cover around the inner air riser 3.

[0026] The inner diameter and axial extension length of the outer shell 1 are much larger than the inner diameter and axial extension length of the inner riser pipe 3, and its volume is 10-30 times that of the riser pipe, so as to ensure that the conical head has sufficient collection capacity and gas residence time, so as to have a sufficiently long maintenance cycle.

[0027] In this embodiment, the filter element 4 is made of high-nickel alloys such as Monel alloy and Hastelloy alloy, or pure nickel material, which have good resistance to fluorine gas corrosion (other components of the equipment may be made of carbon steel, stainless steel or nickel-based alloys). Preferably, the pore size of the filter element 4 is 50-500 mesh.

[0028] To facilitate the inspection and replacement of the filter element 4, a removable disassembly flange 5 is provided on the top of the outer casing 1. This removable disassembly flange 5 is detachably fixed to the top of the outer casing 1, used to cover the top of the outer casing 1, and can be separated from the outer casing 1 when the filter element 4 needs to be inspected and replaced, opening the upper space of the outer casing 1. The gas outlet b is located on this removable disassembly flange 5. Preferably, the removable disassembly flange 5 includes an upper flange for connecting to a fluorine gas transmission pipeline, a lower flange for connecting to the outer casing 1, and a pipeline connecting the upper flange and the lower flange. The outer diameter of the lower flange is close to the outer diameter of the outer casing to reduce the outer diameter of the equipment and the footprint.

[0029] In this embodiment of the utility model, the inner air riser 3, the baffle settling bell jar 2 and the outer shell 1 are coaxially arranged from the inside to the outside, but are not limited thereto.

[0030] In this embodiment of the invention, the sealing material at each interface of the demister is pure metal to ensure corrosion resistance to fluorine gas. For example, the seal between the air inlet a at the bottom of the outer shell and the outlet pipe of the electrolytic cell, the seal between the slag discharge port 6 and the external valve and return pipe, and the seal at the upper and lower flanges of the detachable decomposition flange 5 are all made of pure metal.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A defogging and dust removal device, characterized in that: The device includes a vertical outer shell with a conical end cap at its lower end for collecting sediment. The conical end cap has at least one slag discharge port on its side and an air inlet at its bottom for supplying gas into the outer shell. An inner air riser is located in the lower cavity of the outer shell, with its lower end connected to the air inlet. The upper outer side is covered by a baffle settling bell jar that is open at the bottom and closed at the top. A filter element is located in the upper cavity of the outer shell, with its inner tube connected to the air outlet at the top of the outer shell.

2. The demister and dust collector according to claim 1, characterized in that: The air inlet extends outward from the bottom of the conical head along the axial direction of the outer shell, and forms a flange at the end for connection with the outlet pipe of the electrolytic cell.

3. The demister and dust collector according to claim 1, characterized in that: The inner air riser, the baffle settling bell jar, and the outer shell are arranged coaxially and spaced apart from the inside out.

4. The demister and dust collector according to claim 1, characterized in that: The axial extension length of the inner layer riser pipe meets the requirement that the temperature of the gas discharged at its end outlet is below 70 degrees Celsius.

5. The demister and dust collector according to claim 1, characterized in that: The slag discharge ports are evenly distributed along the outer periphery of the conical head.

6. The demister and dust collector according to claim 1, characterized in that: The inner diameter of the deflector settling bell jar is 3-10 times the inner diameter of the inner riser pipe, and its length is 1 / 4-1 / 2 of the length of the inner riser pipe.

7. The demister and dust collector according to claim 1, characterized in that: The filter element is made of a high-nickel alloy or pure nickel material that is resistant to fluorine corrosion.

8. The demister and dust collector according to claim 1, characterized in that: The inner wall of the deflector settling bell jar is connected and fixed to the outer wall of the inner layer riser pipe via a connecting plate.

9. The demister and dust collector according to claim 1, characterized in that: The top of the outer casing is open, and a removable disassembly flange is removably sealed on the top of the outer casing. The removable disassembly flange includes an upper flange for connection to a fluorine gas delivery pipeline, a lower flange for connection to the outer casing, and a gas delivery pipeline connected between the upper flange and the lower flange, wherein the gas delivery pipeline is in communication with a gas outlet.

10. The demister and dust collector according to any one of claims 1-9, characterized in that: All seals in this demister are made of pure metal and are resistant to corrosion by gas.

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