Blast furnace gas pipeline with U-shaped water seal accumulated water detection device

Abstract

The utility model discloses a blast furnace gas pipeline with a U-shaped water seal accumulated water detection device, and relates to the technical field of metallurgical equipment safety monitoring. The device comprises a U-shaped water seal provided with a gas inlet and a gas outlet, the gas inlet is connected with a gas inlet pipeline, the gas outlet is connected with a gas outlet pipeline, a water outlet is formed in the bottom of the U-shaped water seal, and the water outlet is connected with a water outlet pipeline; a gas pressure detector is arranged on the gas inlet pipeline, and a water level detector is arranged on the water outlet pipeline; the signal output end of the gas pressure detector and the signal output end of the water level detector are connected with the input port of a PLC, and the output port of the PLC is connected with an audible and visual alarm and a computer. According to the utility model, on-line real-time monitoring of the accumulated water condition of the U-shaped water seal of the blast furnace gas can be realized, the excessive accumulated water condition of the U-shaped water seal can be found in time, drainage operation is arranged, the problem of unsmooth circulation of the blast furnace gas is effectively prevented, and potential safety hazards are reduced.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment safety monitoring technology, and in particular to a blast furnace gas pipeline with a U-shaped water seal water accumulation detection device. Background Technology

[0002] The blast furnace gas U-shaped water seal is a device that uses the static pressure of water to prevent the flow of blast furnace gas. Its main function is to safely and reliably cut off the gas supply during maintenance. During normal blast furnace production, the water inside the U-shaped water seal is drained, allowing the blast furnace gas to flow normally through the pipeline. However, because blast furnace gas contains moisture, leaks can occur if the inlet valve of the U-shaped water seal is not tightly closed, leading to water accumulation at the bottom of the seal. Excessive water accumulation reduces the gas flow area, affecting normal gas flow and potentially even cutting off the gas passage. Currently, the assessment and handling of water accumulation in the blast furnace gas U-shaped water seal is primarily done manually, with operators periodically opening the drain valve to check for water accumulation. This method cannot accurately and promptly assess the water level. If the water level is too high and drainage is not timely, it can cause production problems such as impaired gas flow, posing safety hazards. Utility Model Content

[0003] The purpose of this invention is to provide a blast furnace gas pipeline with a U-shaped water seal water accumulation detection device. This device can solve the current problem that the judgment and handling of water accumulation in the U-shaped water seal of blast furnace gas is currently done by the operator periodically opening the drain valve to drain water to determine whether there is water accumulation inside the U-shaped water seal. This method cannot accurately and timely grasp the water accumulation situation and poses a safety hazard.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: This blast furnace gas pipeline with a U-shaped water seal water accumulation detection device includes a U-shaped water seal with an inlet and an outlet. The inlet is connected to a gas inlet pipeline, and the outlet is connected to a gas outlet pipeline. A water outlet is provided at the bottom of the U-shaped water seal, and the water outlet is connected to a water outlet pipeline. A gas pressure detector is provided on the gas inlet pipeline, and a water level detector is provided on the water outlet pipeline. The signal output terminals of the gas pressure detector and the water level detector are connected to the input port of a PLC controller, and the output port of the PLC controller is connected to an audible and visual alarm and a computer.

[0005] A more specific technical solution than the above-mentioned technical solution is that: a gas large disc valve is provided between the gas pressure detector and the gas inlet in the gas inlet pipeline, and the distance between the gas pressure detector and the gas large disc valve is greater than 5 times the diameter of the gas inlet pipeline.

[0006] Furthermore, the water outlet pipe is equipped with a manual drain valve and a pneumatic drain valve. The manual drain valve is located near the water outlet, and the water level detector is located between the water outlet and the manual drain valve. The distance between the water level detector and the manual drain valve is one times the diameter of the water outlet pipe.

[0007] Furthermore, the water outlet pipe is connected to the drainer, and the drainer is equipped with a drain pipe.

[0008] Furthermore, both the gas pressure detector and the water level detector are pressure transmitters with an output signal of 4mA to 20mA.

[0009] Furthermore, the computer is connected to the output port of the PLC controller via a switch.

[0010] Furthermore, the air inlet and the air outlet are respectively located on both sides of the top of the U-shaped water seal.

[0011] Furthermore, the U-shaped water seal has a water inlet below the air inlet, the water inlet is connected to a water inlet pipe, the water inlet pipe is provided with a first valve assembly and a water inlet pipe U-shaped water seal, the water inlet pipe U-shaped water seal is located on the side near the water inlet; the first valve assembly includes a water inlet manual valve and a water inlet pneumatic valve, and the two ends of the first valve assembly are connected to a second valve assembly, the second valve assembly includes a water inlet bypass manual valve and a water inlet bypass pneumatic valve.

[0012] Furthermore, the U-shaped water seal has an overflow port below the air outlet, the overflow port is connected to an overflow pipe, and the overflow pipe is sequentially provided with an overflow pipe U-shaped water seal, an overflow manual valve and an overflow pneumatic valve, the overflow pipe U-shaped water seal being located on the side near the overflow port.

[0013] Furthermore, a water supply pipe is provided between the overflow pipe U-shaped water seal and the connection point of the first valve assembly and the second valve assembly, and the water supply pipe is equipped with a water supply manual valve and a water supply pneumatic valve.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] This invention enables real-time online monitoring of water accumulation in the U-shaped water seal of blast furnace gas. It can promptly detect excessive water accumulation in the U-shaped water seal and arrange drainage operations, effectively preventing problems of poor blast furnace gas flow and reducing safety hazards. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2This is a schematic diagram of the present invention. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0019] like Figure 1 and Figure 2 The blast furnace gas pipeline shown has a U-shaped water seal water accumulation detection device. It includes a U-shaped water seal 1 with an inlet and an outlet. The inlet is connected to the gas inlet pipeline 2, and the outlet is connected to the gas outlet pipeline 3. The bottom of the U-shaped water seal 1 has a water outlet, which is connected to a water outlet pipeline 4. A gas pressure detector 5 is installed on the gas inlet pipeline 2, and a water level detector 6 is installed on the water outlet pipeline 4. The signal output terminals of the gas pressure detector 5 and the water level detector 6 are connected to the input ports of the PLC controller 25. The output ports of the PLC controller 25 are connected to an audible and visual alarm 26 and a computer 28.

[0020] A gas inlet pipe 2 is equipped with a gas butterfly valve 7 between the gas pressure detector 5 and the gas inlet. The distance between the gas pressure detector 5 and the gas butterfly valve 7 is greater than 5 times the diameter of the gas inlet pipe 2, so as to obtain a stable and accurate pressure detection value and reduce the impact of turbulence and vibration caused by the valve.

[0021] The water outlet pipe 4 is equipped with a manual drain valve 8 and a pneumatic drain valve 9. The manual drain valve 8 is located on the side near the water outlet. The water level detector 6 is located between the water outlet and the manual drain valve 8. The distance between the water level detector 6 and the manual drain valve 8 is one times the diameter of the water outlet pipe 4, so as to ensure that the pressure detection is not affected by the valve operation and that the water level can be detected immediately.

[0022] The water outlet pipe 4 is connected to the drainer 10, and the drainer 10 is equipped with a drain pipe 11. Both the gas pressure detector 5 and the water level detector 6 are pressure transmitters, with output signals ranging from 4 mA to 20 mA. The computer 28 is connected to the output port of the PLC controller 25 via a switch 27.

[0023] An air inlet and an air outlet are respectively located on both sides of the top of the U-shaped water seal 1; the U-shaped water seal 1 has a water inlet below the air inlet, which is connected to a water inlet pipe 12. The water inlet pipe 12 is equipped with a first valve assembly and a water inlet pipe U-shaped water seal 13, which is located on the side near the water inlet; the first valve assembly includes a water inlet manual valve 14 and a water inlet pneumatic valve 15, and a second valve assembly is connected to both ends of the first valve assembly. The second valve assembly includes a water inlet bypass manual valve 16 and a water inlet bypass pneumatic valve 17; the U-shaped water seal 1 has an overflow outlet below the air outlet, which is connected to an overflow pipe 18. The overflow pipe 18 is equipped with an overflow pipe U-shaped water seal 19, an overflow manual valve 20, and an overflow pneumatic valve 21 in sequence, with the overflow pipe U-shaped water seal 19 located on the side near the overflow outlet. A water supply pipe 22 is provided between the overflow pipe U-shaped water seal 19 and the connection point of the first valve assembly and the second valve assembly. The water supply pipe 22 is equipped with a water supply manual valve 23 and a water supply pneumatic valve 24.

[0024] In use, this invention collects pressure data from the gas pressure detector 5 and water level detector 6 in real time, and transmits the data signals to the PLC controller 25. The PLC controller 25 converts the 4 mA to 20 mA signal of pressure P measured by the water level detector 6 into the water accumulation height h of the U-shaped water seal 1. P is the static pressure generated by the water accumulation height h of the U-shaped water seal 1 and the pressure P measured by the gas pressure detector 5. 煤 The sum, i.e.: P = ρgh + P 煤 Therefore, h=(PP) 煤 ) / ρg, where ρ is the density of water, ρ=1×10 3 kg / m 3 g is the acceleration due to gravity, g = 9.80 m / s² 2 P and P 煤 The unit is Pa; the unit of h is m. When the water level h exceeds the set value, the PLC controller 25 triggers the audible and visual alarm 26 to issue an alarm signal and transmits data to the computer 28. The computer 28 can monitor the water level data of the U-shaped water seal 1 in real time. When the water level h exceeds the set value, a text alarm is displayed, and historical alarm records can be viewed so that staff can keep track of the water level data. After the audible and visual alarm 26 issues an alarm signal and the computer 28 displays a text alarm, the operator can open the manual drain valve 8 and the pneumatic drain valve 9, and the water will be discharged from the outlet pipe 4 through the drainer 10 and the drain pipe 11.

[0025] When the U-shaped water seal 1 is put into use, it is filled with water. The gas in the pipeline is cut off by the U-shaped water seal 1. In order to ensure the safety and reliability of the U-shaped water seal 1, it is necessary to open the water inlet pipe 12 to continuously inject water into the U-shaped water seal 1 and open the overflow pipe 18 to observe the overflow situation to determine the effectiveness of the U-shaped water seal 1. If the water inlet is abnormal, it may cause the water level in the U-shaped water seal 1 to be too low, and the static pressure may be insufficient and it may be broken by the gas pressure, thus failing to cut off the gas. If there is no overflow from the overflow pipe 18, it means that the water level in the U-shaped water seal 1 is too low or has been broken. The reliability of the U-shaped water seal 1 has decreased or failed, and a large amount of gas may be discharged through the overflow pipe, causing gas poisoning accidents.

[0026] The water supply pipe 22 can introduce overflow water into the water inlet pipe 12 for water recycling, which is environmentally friendly and economical.

[0027] It should be noted that the data signal transmission method, computer display and monitoring method, and PLC controller data signal conversion method involved in the water accumulation detection device provided by this utility model are all common methods in the prior art, and do not involve any improvements in control methods or software. As for the connection methods between the various functional devices, they can all be implemented by those skilled in the art using existing technology, and will not be described in detail here.

Claims

1. A blast furnace gas pipeline having a U-shaped water seal water accumulation detection device, characterized by: The utility model provides a coal gas storage tank with U-shaped water seal, which comprises a U-shaped water seal provided with an air inlet and an air outlet, the air inlet is connected with a coal gas inlet pipeline, the air outlet is connected with a coal gas outlet pipeline, the bottom of the U-shaped water seal is provided with a water outlet, and the water outlet is connected with a water outlet pipeline; a coal gas pressure detector is arranged on the coal gas inlet pipeline, and a water level detector is arranged on the water outlet pipeline; the signal output ends of the coal gas pressure detector and the water level detector are connected with the input port of a PLC controller, and the output port of the PLC controller is connected with a sound-light alarm and a computer.

2. The blast furnace gas pipeline with U-type water seal accumulated water detection device according to claim 1, characterized in that: A coal gas disc valve is arranged between the coal gas pressure detector and the air inlet of the coal gas inlet pipeline, and the distance between the coal gas pressure detector and the coal gas disc valve is greater than 5 times the diameter of the coal gas inlet pipeline.

3. The blast furnace gas pipeline with U-shaped water seal water accumulation detection device according to claim 1 or 2, characterized in that: A drain manual valve and a drain pneumatic valve are arranged on the water outlet pipeline, the drain manual valve is arranged on the side close to the water outlet, the water level detector is arranged between the water outlet and the drain manual valve, and the distance between the water level detector and the drain manual valve is 1 times the diameter of the water outlet pipeline.

4. The blast furnace gas pipeline with U-type water seal accumulated water detection device according to claim 3, characterized in that: The water outlet pipeline is connected with a drain device, and the drain device is provided with a drain pipe.

5. The blast furnace gas pipeline with U-type water seal accumulated water detection device according to claim 4, characterized in that: The coal gas pressure detector and the water level detector are both pressure transmitters, and the output signals are 4 mA-20 mA.

6. The blast furnace gas pipeline with U-type water seal accumulated water detection device according to claim 5, characterized in that: The computer is connected with the output port of the PLC controller through a switch.

7. The blast furnace gas pipeline with U-type water seal accumulated water detection device according to claim 6, characterized in that: The air inlet and the air outlet are respectively arranged on the two sides of the top of the U-shaped water seal.

8. The blast furnace gas pipeline with U-shaped water seal water accumulation detection device according to claim 7, characterized in that: A water inlet is arranged below the air inlet of the U-shaped water seal, the water inlet is connected with a water inlet pipeline, the water inlet pipeline is provided with a first valve assembly and a water inlet pipeline U-shaped water seal, and the water inlet pipeline U-shaped water seal is arranged on the side close to the water inlet; the first valve assembly comprises a water inlet manual valve and a water inlet pneumatic valve, the two ends of the first valve assembly are connected with a second valve assembly, and the second valve assembly comprises a water inlet bypass manual valve and a water inlet bypass pneumatic valve.

9. The blast furnace gas pipeline with U-type water seal accumulated water detection device according to claim 8, characterized in that: An overflow port is arranged below the air outlet of the U-shaped water seal, the overflow port is connected with an overflow pipeline, the overflow pipeline is sequentially provided with an overflow pipeline U-shaped water seal, an overflow manual valve and an overflow pneumatic valve, and the overflow pipeline U-shaped water seal is arranged on the side close to the overflow port.

10. The blast furnace gas pipeline with U-shaped water seal water accumulation detection device according to claim 9, characterized in that: A water supplement pipeline is arranged between the overflow pipeline U-shaped water seal and the connection points of the first valve assembly and the second valve assembly, and the water supplement pipeline is provided with a water supplement manual valve and a water supplement pneumatic valve.

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