Copper smelting flue gas sampling port anti-blocking device

Abstract

The utility model discloses a copper smelting flue gas sampling port anti-blocking device which comprises a flue, a flue gas sampling pipe, a hydraulic mechanism and a piston, a notch is formed in the flue, an air chamber is fixedly arranged at the notch, a smoke blocking cover is arranged at an air inlet of the air chamber, one end of the piston is connected with the hydraulic structure, and a piston rod is arranged at the other end of the piston. The piston rod penetrates through the gas chamber and is connected with the smoke blocking cover, the smoke sampling pipe is inserted into the gas chamber and fixedly connected with the gas chamber, and a smoke sampling valve is arranged on the smoke sampling pipe. When smoke normally flows in the flue, certain pressure is applied to the smoke blocking cover, so that the smoke blocking cover and the air chamber are completely sealed, dust carried by the smoke only adheres to the outsides of the smoke blocking cover and the air chamber and cannot enter a smoke sampling pipe, the situation that a smoke sampling opening is blocked is fundamentally eliminated, and the real-time performance, representativeness and accuracy of measured data are guaranteed.

Description

A device for preventing clogging of copper smelting flue gas sampling ports Technical Field

[0001] This utility model relates to the technical field of copper smelting flue gas sampling, specifically a copper smelting flue gas sampling port anti-clogging device. Background Technology

[0002] As an important branch of the non-ferrous metals industry, copper smelting has always placed a focus on the treatment of flue gas generated during its smelting process as a key area of ​​technological development. Modern copper smelting processes mainly include converter smelting, flash blowing, and anode furnace refining. The flue gas generated by these high-temperature metallurgical processes has the following significant characteristics: flue gas temperature reaches 300-400℃, SO2 concentration fluctuates between 3-15%, dust content reaches 5-30g / Nm³, and it also contains complex components such as heavy metal aerosols (As, Pb, Zn) and sulfuric acid mist. This type of high-parameter, multi-component industrial flue gas must undergo an acid production system to achieve the resource-based conversion of SO2, meeting the emission standards for sulfuric acid industry while also enabling the recycling of sulfur resources.

[0003] The sampling points in the flue gas sulfuric acid production process play a crucial role in process monitoring. The key parameters acquired, such as pressure, temperature, and SO2 concentration, directly affect core process aspects like catalyst efficiency in the conversion tower and circulating acid concentration control in the absorption tower. Therefore, it is essential to ensure the real-time nature, representativeness, and accuracy of the measured data. In the dual-conversion, dual-absorption sulfuric acid production process, sampling points are set at the inlet and outlet of each piece of equipment, thus forming a complete process parameter monitoring network.

[0004] Submicron-sized dust particles (<5μm) in flue gas have strong adhesive properties and easily form a dust layer on the pipe wall during transmission when the flow rate in the sampling tube decreases to 2-5 m / s. Actual measurement data shows that after 72 hours of continuous operation without protective measures, the effective diameter of a 20mm inner diameter sampling tube shrinks to less than 8mm, resulting in a measurement error exceeding 30%.

[0005] Traditional sampling tubes are inserted directly into the flue and welded to the flue wall. Prolonged contact between the flue gas and the sampling tube leads to dust blockage. When sampling is needed, the sampling valve is opened, and the flue gas pressure further compresses the dust into the sampling tube, forming stubborn scale. Routine reverse pressurization and blowing are ineffective and introduce other gases, affecting the process. Severe blockage necessitates a shutdown for repair, and accurate data cannot be obtained before repair.

[0006] Therefore, how to avoid clogging of the flue gas sampling port as much as possible and ensure the real-time nature, representativeness and accuracy of the measurement data is a problem worth studying. Summary of the Invention

[0007] In view of this, the purpose of this utility model is to provide a device for preventing blockage at the sampling port of copper smelting flue gas.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A device for preventing blockage at a copper smelting flue gas sampling port includes a flue, a flue gas sampling pipe, a hydraulic mechanism, and a piston. The flue has a notch, and a gas chamber is fixedly installed at the notch. A smoke-blocking hood is installed at the inlet of the gas chamber. One end of the piston is connected to the hydraulic mechanism, and the other end of the piston has a piston rod that passes through the gas chamber and is connected to the smoke-blocking hood. The flue gas sampling pipe is inserted into the gas chamber and fixedly connected to it. A flue gas sampling valve is installed on the flue gas sampling pipe.

[0010] Furthermore, the hydraulic mechanism consists of an A oil pipe, a hydraulic station, a B oil pipe, and an oil cylinder. One end of the piston is located inside the oil cylinder. The oil cylinder and the air chamber are detachably connected. One end of the A oil pipe and the B oil pipe are respectively connected to the hydraulic station, and the other end of the A oil pipe and the B oil pipe are respectively connected to the top and bottom of the oil cylinder.

[0011] Furthermore, the air chamber is funnel-shaped, with its small end extending out of the flue and its funnel-shaped opening located inside the flue, and the smoke hood located at the funnel-shaped opening of the air chamber.

[0012] Furthermore, the smoke hood is arc-shaped, and the outer edge of the smoke hood is provided with a flange extending towards the air chamber.

[0013] During sampling, as shown in Figure 2, the hydraulic station pressurizes oil into the upper part of the piston through oil pipe B, while the oil in the lower part of the piston flows back to the hydraulic station through oil pipe A. This causes the piston, piston rod, and smoke hood to move downwards together, opening the gas chamber. The gas fills the gas chamber and the gas sampling pipe, and sampling is achieved by opening the gas sampling valve. After sampling, as shown in Figure 1, the hydraulic station pressurizes oil into the lower part of the piston through oil pipe A, while the oil in the upper part of the piston flows back to the hydraulic station through oil pipe B. This causes the piston, piston rod, and smoke hood to move upwards together, closing the gas chamber and shutting off the gas sampling valve.

[0014] When the flue gas flows normally in the flue, a certain pressure is applied to the smoke hood to form a complete seal with the gas chamber. The dust carried by the flue gas will only adhere to the outside of the smoke hood and the gas chamber and will not be able to enter the flue gas sampling tube. This eliminates the problem of blockage at the flue gas sampling port from the root, ensuring the real-time, representative and accurate measurement data. Attached Figure Description

[0015] Figure 1 is a front view schematic diagram of the anti-blocking device for copper smelting flue gas sampling port of this utility model when closed;

[0016] Figure 2 is a front view schematic diagram of the anti-blocking device for copper smelting flue gas sampling port of this utility model when it is opened. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited thereto.

[0018] A copper smelting flue gas sampling port anti-clogging device, as shown in Figures 1 and 2, includes a flue duct 3, a flue gas sampling pipe 1, a hydraulic mechanism, and a piston 9. The flue duct 3 has a notch, and a gas chamber 11 is fixedly installed at the notch. A smoke hood 5 is installed at the air inlet of the gas chamber 11. The hydraulic mechanism consists of an A oil pipe 6, a hydraulic station 7, a B oil pipe 8, and an oil cylinder (not shown in the figure). The oil cylinder and the gas chamber 11 are detachably connected. One end of the A oil pipe 6 and the B oil pipe 8 are respectively connected to the hydraulic station 7, and the other end of the A oil pipe 6 and the B oil pipe 8 are respectively connected to the top and bottom of the oil cylinder. One end of the piston 9 is located inside the oil cylinder, and the other end of the piston 9 is provided with a piston rod 10. The piston rod 10 passes through the oil cylinder and the gas chamber 11 in sequence, and the end is connected to the smoke hood 5. The flue gas sampling pipe 1 is inserted into the gas chamber 11 and fixedly connected to the gas chamber 11. A flue gas sampling valve 2 is provided on the flue gas sampling pipe 1.

[0019] The air chamber 11 is funnel-shaped, with its small end extending out of the flue 3 and its funnel-mouth end located inside the flue. The smoke hood 5 is located at the funnel-mouth end of the air chamber 11. The smoke hood 5 is arc-shaped, and its outer edge has a flange extending towards the air chamber (not shown in the figure).

[0020] The gas chamber 11 is welded to the flue 3.

[0021] The smoke shield 5 and the piston 9 are connected by the piston rod 10.

[0022] During sampling, as shown in Figure 2, the hydraulic station 7 pressurizes oil into the upper part of the piston 9 through the B oil pipe 8, and the oil in the lower part of the piston 9 flows back to the hydraulic station 7 through the A oil pipe 6, causing the piston 9, piston rod 10 and smoke hood 5 to move downward together, opening the gas chamber 11, and the flue gas 4 fills the gas chamber 11 and the flue gas sampling pipe 1. Sampling is achieved by opening the flue gas sampling valve 2.

[0023] After the sampling is completed, as shown in Figure 1, the hydraulic station 7 pressurizes oil into the lower part of the piston 9 through the A oil pipe 6, and the oil in the upper part of the piston 9 flows back to the hydraulic station 7 through the B oil pipe 8, causing the piston 9, piston rod 10 and smoke hood 5 to move upward together, closing the gas chamber 11 and closing the flue gas sampling valve 2.

[0024] When the flue gas 4 flows normally in the flue, it applies a certain pressure to the smoke hood 5, making it completely sealed with the gas chamber 11. The dust carried by the flue gas will only adhere to the outside of the smoke hood 5 and the gas chamber 11 and will not be able to enter the flue gas sampling tube 1, thus eliminating the blockage of the flue gas sampling port from the root and ensuring the real-time, representative and accurate measurement data.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the specific implementation of this utility model and not to limit it. Those skilled in the art should understand that any equivalent substitutions or obvious modifications made to the implementation of this utility model without changing its performance or use, without violating the spirit of this utility model, should be covered within the scope of protection claimed by this utility model.

Claims

1. A device for preventing blockage at a copper smelting flue gas sampling port, characterized in that, It includes a flue, a flue gas sampling pipe, a hydraulic mechanism, and a piston. The flue has a notch, and a gas chamber is fixedly installed at the notch. A smoke barrier is installed at the air inlet of the gas chamber. One end of the piston is connected to the hydraulic mechanism, and the other end of the piston has a piston rod. The piston rod passes through the gas chamber and is connected to the smoke barrier. The flue gas sampling pipe is inserted into the gas chamber and fixedly connected to the gas chamber. A flue gas sampling valve is installed on the flue gas sampling pipe.

2. The anti-clogging device for copper smelting flue gas sampling port according to claim 1, characterized in that, The hydraulic mechanism consists of an A oil pipe, a hydraulic station, a B oil pipe, and an oil cylinder. One end of the piston is located inside the oil cylinder. The oil cylinder and the air chamber are detachably connected. One end of the A oil pipe and the B oil pipe are connected to the hydraulic station, and the other end of the A oil pipe and the B oil pipe are connected to the top and bottom of the oil cylinder, respectively.

3. The anti-clogging device for copper smelting flue gas sampling port according to claim 1, characterized in that, The air chamber is funnel-shaped, with its small end extending out of the flue and its funnel-shaped opening located inside the flue. The smoke hood is located at the funnel-shaped opening of the air chamber.

4. The anti-clogging device for copper smelting flue gas sampling port according to claim 1 or 3, characterized in that, The smoke hood is arc-shaped, and its outer edge has a flange extending towards the air chamber.

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