Pressure conduction isolator for detecting tail gas pressure of submerged arc furnace
By designing an isolator for the tail gas pressure of a submerged arc furnace, the silicon micropowder is isolated and the pressure is stabilized, solving the problem of high-temperature tail gas affecting pressure detection, and achieving accurate pressure measurement and extending the life of the device.
Patent Information
- Application Number
- CN202520690540.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-11
AI Technical Summary
In existing technologies, silicon micropowder in high-temperature exhaust gas tends to adhere to the surface of the pressure transmitter diaphragm, leading to a decrease in the sensitivity of the detection element, an error greater than ±15%, affecting the accuracy of pressure measurement and shortening its service life.
A pressure conduction isolator was designed, comprising an isolation tube, an elastic isolation bag, a pressure balancing pipeline, and a buffer assembly. The isolation tube and elastic isolation bag isolate silicon micropowder, while the buffer assembly and a bidirectional pressure automatic balancing valve stabilize the pressure, reducing the impact of high-temperature exhaust gas and sudden airflow.
This effectively reduces pressure detection errors, extends the service life of the pressure detection device, and ensures the accuracy and stability of pressure measurement.
Smart Images
Figure CN223896953U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas treatment technology in industrial silicon smelting, and in particular to a pressure transmission isolator for detecting the pressure of tail gas in a submerged arc furnace. Background Technology
[0002] The exhaust gas generated during the smelting of industrial silicon must undergo environmental dust removal and meet standards before being discharged. During this dust removal process, the pressure of the gas within the flue needs to be monitored in real time. Current technology uses a pressure transmitter directly connected to the flue via a pressure tap to detect the pressure of the high-temperature exhaust gas. However, silicon microparticles with a diameter of less than 50μm in the high-temperature exhaust gas easily adhere to the diaphragm surface of the pressure transmitter, causing a decrease in the sensitivity of the sensing element. After continuous operation for a period of time, the error can reach ±15% or more, affecting not only the accuracy of pressure measurement but also the service life of the pressure transmitter. Utility Model Content
[0003] In view of this, the present invention provides a pressure transmission isolator for detecting the pressure of tail gas in a submerged arc furnace. The main purpose is to reduce the impact of high-temperature tail gas and sudden airflow on the pressure detection device, reduce pressure detection errors, and extend the service life of the pressure detection device.
[0004] To achieve the above objectives, this utility model mainly provides the following technical solutions:
[0005] An embodiment of this utility model provides a pressure transmission isolator for detecting the pressure of tail gas in a submerged arc furnace, comprising: an isolation tube one, an isolation tube two, an elastic isolation bag, a pressure balancing pipeline, and a buffer assembly;
[0006] The isolation pipe is a circular pipe structure; a connecting flange is fixedly provided at one end of the isolation pipe; the inner diameter of the connecting flange is not less than the inner diameter of the isolation pipe; a sealing end cap is detachably provided on the connecting flange; a connector for connecting a pressure source is provided at the center of the sealing end cap.
[0007] A connecting flange two is fixedly provided at the other end of the isolation pipe one; a threaded through hole is provided at the center of the connecting flange two; the threaded through hole is coaxially distributed with the isolation pipe;
[0008] The isolation tube has a connection hole on its side wall;
[0009] The second isolation tube is a circular tube structure; a connecting flange third is fixedly provided at one end of the second isolation tube; a connecting through hole is provided in the center of the connecting flange third; the connecting flange third and the connecting flange second are locked together by fasteners, so that the second isolation tube and the isolation tube are coaxially distributed;
[0010] The other end of the isolation pipe two is fixedly provided with a connecting flange four; the inner diameter of the connecting flange four is not less than the inner diameter of the isolation pipe two.
[0011] A sealing end cap 2 is detachably provided on the connecting flange 4; a connector 2 for connecting a pressure detection device is provided at the center of the sealing end cap 2;
[0012] The second isolation tube has a second connection hole on its side wall;
[0013] The elastic isolation bag is detachably mounted on the connecting through hole and located inside the second isolation tube;
[0014] One end of the pressure balancing pipeline is connected to the first connection hole; the other end of the pressure balancing pipeline is connected to the second connection hole; a bidirectional automatic pressure balancing valve is installed on the pressure balancing pipeline.
[0015] The buffer assembly includes: a filter tube and buffer blades;
[0016] One end of the filter tube is closed; the other end of the filter tube is threadedly connected to the threaded through hole.
[0017] The buffer blades are fixedly disposed on the outer wall of the filter tube; there are multiple buffer blades; the multiple buffer blades are arranged in an array along the axial direction of the filter tube;
[0018] The filter tube is provided with filter holes; the filter holes are slot structures of a predetermined width; the filter holes are located on the downstream side of the buffer blade.
[0019] Furthermore, the elastic isolation bag is a nitrile rubber elastic isolation bag.
[0020] Furthermore, a polytetrafluoroethylene gasket is provided between the sealing end cap and the connecting flange.
[0021] A polytetrafluoroethylene gasket is provided between the sealing end cap 2 and the connecting flange 4.
[0022] Furthermore, the inner diameter of the second isolation tube is the same as the inner diameter of the first isolation tube.
[0023] Furthermore, a slot is provided at one end of the filter tube.
[0024] By employing the above technical solution, the pressure transmission isolator for detecting tail gas pressure in a submerged arc furnace of this utility model has at least the following advantages:
[0025] It can reduce the impact of high-temperature exhaust gas and sudden airflow on pressure detection devices, reduce pressure detection errors, and extend the service life of pressure detection devices.
[0026] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of a pressure conduction isolator for detecting the tail gas pressure of a submerged arc furnace, provided as an embodiment of the present invention.
[0028] As shown in the figure:
[0029] 1 is connector one, 2 is sealing end cap one, 3 is connecting flange one, 4 is isolation pipe one, 5 is buffer assembly, 5-1 is filter pipe, 5-2 is buffer blade, 5-3 is filter hole, 5-4 is slot, 6 is connecting flange two, 7 is connecting flange three, 8 is isolation pipe two, 9 is connecting flange four, 10 is sealing end cap two, 11 is connector two, 12 is pressure balancing pipeline, 13 is bidirectional pressure automatic balancing valve, and 14 is elastic isolation bag. Detailed Implementation
[0030] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.
[0031] like Figure 1 As shown in the figure, an embodiment of this utility model proposes a pressure conduction isolator for detecting the pressure of tail gas in a submerged arc furnace, comprising: an isolation pipe 4, an isolation pipe 8, an elastic isolation bag 14, a pressure balancing pipeline 12, and a buffer assembly 5; the isolation pipe 4 is a circular pipe structure; the isolation pipe 4 can be made of stainless steel. A connecting flange 3 is fixedly provided at one end of the isolation pipe 4, which can be welded to ensure a seal. The inner diameter of the connecting flange 3 is not less than the inner diameter of the isolation pipe 4, so that one end of the isolation pipe 4 is open; a sealing end cap 2 is detachably provided on the connecting flange 3; preferably, a polytetrafluoroethylene gasket 1 is provided between the sealing end cap 2 and the connecting flange 3 to ensure its sealing performance. A connector 1 for connecting a pressure source is provided at the center of the sealing end cap 2 to facilitate connection of the pressure source pipeline. A connecting flange 6 is fixedly provided at the other end of the isolation pipe 4; a threaded through hole is provided at the center of the connecting flange 6 for connecting the buffer assembly 5. The threaded through hole is coaxially distributed with the isolation tube 4; the side wall of the isolation tube 4 has a connection hole for connecting the pressure balance pipe 12.
[0032] The second isolation tube 8 is a circular tube structure; it can be made of stainless steel. A connecting flange 7 is fixedly installed at one end of the second isolation tube 8, preferably by welding to ensure a seal. A connecting through hole is provided in the center of the connecting flange 7, and a quick-connect fitting or internal thread is provided within the connecting through hole for easy connection with the elastic isolation bag 14. The connecting flange 7 and the connecting flange 6 are locked together with fasteners, making the second isolation tube 8 and the first isolation tube 4 coaxially distributed. The second isolation tube 8 and the first isolation tube 4 are connected through the connecting through hole and the threaded through hole. Preferably, the inner diameter of the second isolation tube 8 is the same as the inner diameter of the first isolation tube 4 to ensure reliable connection.
[0033] A connecting flange 9 is fixedly provided at the other end of the isolation tube 2 8; the inner diameter of the connecting flange 4 9 is not less than the inner diameter of the isolation tube 2 8, so that the other end of the isolation tube 2 8 is open, providing space for the elastic isolation bag 14 to be accommodated and operated. A sealing end cap 2 10 is detachably provided on the connecting flange 4 9; a connector 2 11 for connecting a pressure detection device is provided at the center of the sealing end cap 2 10 to facilitate connection with the pressure detection device. Preferably, a polytetrafluoroethylene gasket 2 is provided between the sealing end cap 2 10 and the connecting flange 4 9 to ensure its sealing performance. The side wall of the isolation tube 2 8 has a connecting hole 2 for connecting to the pressure balancing pipeline 12.
[0034] The elastic isolation bag 14 is detachably mounted on the connecting through hole and located inside the isolation tube 8. The elastic isolation bag 14 can be connected to the connecting through hole via threads or snaps. The elastic isolation bag 14 isolates smoke and dust through the principle of "pressure isolation and conduction," collecting silica powder with a particle size ≤50μm in the exhaust gas within the rubber isolation bag. The silica powder in the rubber isolation bag is periodically cleaned, while simultaneously transmitting gas pressure to the air medium behind the isolation belt without loss. This protects the sensitive elements of the pressure detection device from dust corrosion, viscous media, or high-pressure impacts, while ensuring the accuracy and stability of pressure measurement. Preferably, the elastic isolation bag 14 is made of nitrile rubber, which is corrosion-resistant and has a long service life.
[0035] One end of the pressure balancing pipeline 12 is connected to connection hole one; the other end of the pressure balancing pipeline 12 is connected to connection hole two; a bidirectional automatic pressure balancing valve 13 is installed on the pressure balancing pipeline 12; the pressure balancing pipeline 12 can be made of 304 stainless steel. The adjustable pressure range of the bidirectional automatic pressure balancing valve 13 is 10-100Pa. When the pressure at the gas source suddenly increases to the set value, the bidirectional automatic pressure balancing valve 13 opens in the forward direction, and the sudden pressure is directly transmitted to the sensor of the pressure transmitter through the bidirectional automatic pressure balancing valve 13, playing a pressure compensation role, reducing the impact of the sudden pressure on the elastic isolation bag 14, and protecting the elastic isolation bag 14. When the pressure at the gas source suddenly decreases to the set value, the bidirectional automatic pressure balancing valve 13 opens in the reverse direction, and the pressure is released through the bidirectional automatic pressure balancing valve 13, playing a pressure counter-compensation role, reducing the back impact of the sudden pressure on the elastic isolation bag 14, protecting the elastic isolation bag 14, and ensuring the accuracy and stability of pressure measurement.
[0036] The buffer assembly 5 includes a filter tube 5-1 and buffer blades 5-2. One end of the filter tube 5-1 is closed, and the other end is threaded into a threaded through hole for easy disassembly and cleaning of dust. Preferably, one end of the filter tube 5-1 is provided with a slot 5-4 to facilitate disassembly and installation of the filter tube 5-1 using tools. The buffer blades 5-2 are fixedly mounted on the outer wall of the filter tube 5-1. There are multiple buffer blades 5-2, which are arranged in an array along the axial direction of the filter tube 5-1. The buffer blades 5-2 can reduce the impact of sudden airflow on the elastic isolation bag 14, preventing the elastic isolation bag 14 from being burned by sudden high-temperature gas or impacted by high-speed gas, and ensuring the accuracy and stability of pressure measurement. The filter tube 5-1 is provided with filter holes 5-3. The filter holes 5-3 are slotted structures of a predetermined width, increasing the airflow and reducing particle entry, thus extending the service life of the elastic isolation bag 14. The predetermined width can be set as needed. The filter hole 5-3 is located on the downstream side of the buffer blade 5-2 to prevent the airflow from directly impacting the filter hole 5-3.
[0037] One embodiment of this utility model proposes a pressure conduction isolator for detecting the pressure of exhaust gas in a submerged arc furnace. It is connected in series in the circuit of the pressure tapping pipe to isolate the flue gas from the pressure detection device. This reduces the impact of high-temperature exhaust gas and sudden airflow on the pressure detection device, reduces pressure detection errors, and extends the service life of the pressure detection device. It is suitable for high-temperature, high-dust flue gas pressure detection systems in industrial silicon smelting processes.
[0038] To further clarify, while the terms "first," "second," etc., may be used herein to describe various elements, these terms should not limit the elements. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element; these terms are used only to distinguish one element from another. This does not depart from the scope of the exemplary embodiments. Similarly, "element one," "element two," and so on do not represent the order of elements; these terms are used only to distinguish one element from another. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items.
[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0040] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0041] 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. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A pressure transmission isolator for detecting the pressure of exhaust gas in a submerged arc furnace, characterized in that, Includes: isolation tube one, isolation tube two, elastic isolation bag, pressure balancing tubing and cushioning components; The isolation pipe is a circular pipe structure; a connecting flange is fixedly provided at one end of the isolation pipe; the inner diameter of the connecting flange is not less than the inner diameter of the isolation pipe; a sealing end cap is detachably provided on the connecting flange; a connector for connecting a pressure source is provided at the center of the sealing end cap. A connecting flange two is fixedly provided at the other end of the isolation pipe one; a threaded through hole is provided at the center of the connecting flange two; the threaded through hole is coaxially distributed with the isolation pipe; The isolation tube has a connection hole on its side wall; The second isolation tube is a circular tube structure; a connecting flange third is fixedly provided at one end of the second isolation tube; a connecting through hole is provided at the center of the connecting flange third; the connecting flange third and the connecting flange second are locked together by fasteners, so that the second isolation tube and the isolation tube are coaxially distributed; The other end of the isolation pipe two is fixedly provided with a connecting flange four; the inner diameter of the connecting flange four is not less than the inner diameter of the isolation pipe two. A sealing end cap 2 is detachably provided on the connecting flange 4; a connector 2 for connecting a pressure detection device is provided at the center of the sealing end cap 2; The second isolation tube has a second connection hole on its side wall; The elastic isolation bag is detachably mounted on the connecting through hole and located inside the second isolation tube; One end of the pressure balancing pipeline is connected to the first connection hole; the other end of the pressure balancing pipeline is connected to the second connection hole; a bidirectional automatic pressure balancing valve is installed on the pressure balancing pipeline. The buffer assembly includes: a filter tube and buffer blades; One end of the filter tube is closed; the other end of the filter tube is threadedly connected to the threaded through hole. The buffer blades are fixedly disposed on the outer wall of the filter tube; there are multiple buffer blades; the multiple buffer blades are arranged in an array along the axial direction of the filter tube; The filter tube is provided with filter holes; the filter holes are slot structures of a predetermined width; the filter holes are located on the downstream side of the buffer blade.
2. The pressure transmission isolator for detecting tail gas pressure in a submerged arc furnace according to claim 1, characterized in that, The elastic isolation bag is a nitrile rubber elastic isolation bag.
3. The pressure transmission isolator for detecting tail gas pressure in a submerged arc furnace according to claim 1, characterized in that, A polytetrafluoroethylene gasket is provided between the sealing end cap and the connecting flange. A polytetrafluoroethylene gasket is provided between the sealing end cap 2 and the connecting flange 4.
4. The pressure transmission isolator for detecting tail gas pressure in a submerged arc furnace according to claim 1, characterized in that, The inner diameter of the second isolation tube is the same as that of the first isolation tube.
5. The pressure transmission isolator for detecting tail gas pressure in a submerged arc furnace according to claim 1, characterized in that, A slot is provided at one end of the filter tube.