Burnthrough-preventing monitoring device for burning gas pipeline of hot blast stove

Abstract

The utility model discloses an anti-burnthrough monitoring device for a burning furnace gas pipeline of a hot blast stove, which comprises the burning furnace gas pipeline communicated with the hot blast stove, a gas burning valve is mounted on the burning furnace gas pipeline, and a mounting hole is formed in the pipe wall of the bottom of the burning furnace gas pipeline. The installation hole is located in the side, away from the hot blast stove, of the gas combustion valve, an installation pipe is inserted into the installation hole, and a thermocouple is inserted into the installation pipe. According to the anti-burnthrough monitoring device for the burning furnace gas pipeline of the hot blast stove, the sealing problem of the gas combustion valve and the potential burnthrough risk of the burning furnace gas pipeline can be found in time by monitoring the temperature in real time, continuous erosion of high-pressure and high-temperature hot air to the burning furnace gas pipeline is avoided, and the service life of the burning furnace gas pipeline is prolonged. The burning-through accident of the burning furnace gas pipeline is effectively prevented, and safe operation of a hot blast stove system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot -blast stove safe production technical field especially, relates to a kind of hot -blast stove furnace gas pipeline burn-through prevention monitoring device. BACKGROUND

[0002] Ironmaking blast furnace hot -blast stove is extremely important process equipment in ironmaking system of steel enterprise, and its safe, stable, efficient operation is crucial to the overall production of ironmaking plant.The main function of hot -blast stove is to heat blast to the required high temperature, so as to improve the smelting efficiency and economic benefit of blast furnace.In the operation process of hot -blast stove, gas is sent into hot -blast stove combustion chamber through gas pipeline, and high-temperature waste gas is generated by gas combustion in combustion chamber, which is stored by checker bricks.When checker bricks are fully heated, hot -blast stove switches to air supply mode, at this time, the combustion-related valves including gas combustion valve on gas pipeline are closed, and air supply valve is opened, and cold air is heated by checker bricks and sent into blast furnace.

[0003] However, in the air supply process of hot -blast stove, if the gas combustion valve on gas pipeline is not closed tightly, high-pressure high-temperature hot air in hot -blast stove will leak through the gas combustion valve that is not completely closed, and enter the furnace gas pipeline, causing high-temperature erosion to the furnace gas pipeline.Over a long period of time, continuous high-temperature erosion not only damages the gas pipeline, making the gas pipeline have the risk of burning through, but also causes safety hazards, and even affects the normal operation of the entire ironmaking system.

[0004] At present, although the design and operation of hot -blast stove are relatively mature, the sealing problem of gas combustion valve is still a technical problem to be solved in actual operation.The sealing requirement of valve is very high in the switching process of combustion and air supply in traditional hot -blast stove system, but in actual operation, due to valve aging, improper operation or material deformation in high-temperature environment, the valve is not tightly sealed.In addition, the existing hot -blast stove system also has deficiencies in monitoring and early warning, and lacks real-time monitoring and rapid response mechanism for temperature change of gas pipeline.

[0005] Therefore, developing a device that can timely find valve sealing problem and prevent furnace gas pipeline from burning through is of great significance to improve the safety and reliability of hot -blast stove. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of hot -blast stove furnace gas pipeline burn-through prevention monitoring device.

[0007] The technical scheme for realizing the purpose of the utility model is: a hot blast stove furnace gas pipeline anti-burning-through monitoring device, which comprises a furnace gas pipeline communicated with a hot blast stove, a gas combustion valve is installed on the furnace gas pipeline, an installation hole is formed in the pipe wall of the bottom of the furnace gas pipeline, the installation hole is located on the side of the gas combustion valve away from the hot blast stove, an installation pipe is inserted into the installation hole, the peripheral wall of the installation pipe is sealingly installed with the inner wall of the installation hole, one end of the installation pipe inserted into the furnace gas pipeline is a closed blind end, and the other end of the installation pipe located outside the furnace gas pipeline is an open end; a thermocouple is inserted into the installation pipe, the thermocouple has a working end and a cold end, the working end of the thermocouple is located in the installation pipe and is in contact with the blind end of the installation pipe, a heat insulation plate is fixedly installed below the furnace gas pipeline, a through hole is formed in the heat insulation plate, the thermocouple passes through the through hole and is fixedly installed on the heat insulation plate, and the cold end of the thermocouple is located below the heat insulation plate.

[0008] Further, a clamp is fixedly installed on the bottom of the heat insulation plate, and the thermocouple is clamped on the clamp. The thermocouple is fixedly installed on the heat insulation plate through the clamp. Compared with the direct fixing of the thermocouple and the heat insulation plate, the clamping and dismounting are more flexible and convenient when the thermocouple is fixed on the heat insulation plate through the clamp.

[0009] Further, the inner diameter of the installation pipe and the diameter of the thermocouple in the installation pipe are consistent.

[0010] The hot blast stove furnace gas pipeline anti-burning-through monitoring device can realize real-time monitoring of the temperature change of the furnace gas pipeline and the temperature change in the furnace gas pipeline through the installation of the thermocouple on the furnace gas pipeline, and when the temperature of the furnace gas pipeline and the temperature in the furnace gas pipeline abnormally rise, it is indicated that the gas combustion valve may be closed too loosely, the hot blast in the hot blast stove leaks into the furnace gas pipeline, and the furnace gas pipeline is eroded. The hot blast stove furnace gas pipeline anti-burning-through monitoring device can timely find the sealing problem of the gas combustion valve and the potential burning-through risk of the furnace gas pipeline through real-time monitoring of the temperature, avoid the continuous erosion of the high-pressure and high-temperature hot blast on the furnace gas pipeline, effectively prevent the occurrence of the burning-through accident of the furnace gas pipeline, and guarantee the safe operation of the hot blast stove system. This can not only reduce the frequency of damage of the furnace gas pipeline due to high-temperature erosion, prolong the service life of the pipeline, and reduce the equipment replacement cost, but also can avoid the fire or explosion caused by gas leakage and other serious safety accidents, significantly reduce such safety hazards, and guarantee the safety of personnel and equipment in the production site.

[0011] The utility model discloses hot -blast furnace coal gas pipeline burn through prevention monitoring devices, install the thermocouple, through setting up the installation hole on the pipe wall of the bottom of the coal gas pipeline of burning furnace, then in the installation hole inserts the installation pipe of one end is blind end, the periclinal wall of installation pipe is sealed with the inner wall of installation hole, the sealed structure between installation pipe and installation hole and the blind end of installation pipe's setting, guarantee the leakproofness of the coal gas pipeline of burning furnace, the coal gas pipeline of burning furnace does not have the leakage point because of the setting of installation hole and installation pipe, and then influence normal work. Under the condition that guarantee the coal gas pipeline of burning furnace can work normally, the structure that installation pipe extends to the coal gas pipeline of burning furnace, on one hand, provides the space of insertion for the thermocouple, makes the thermocouple can be installed, on the other hand, the thermocouple in installation pipe and its extension to the coal gas pipeline of burning furnace, close to the inside of the coal gas pipeline of burning furnace, at the same time, the working end of thermocouple and the blind end of installation pipe are in contact, the thermocouple in the inside of the coal gas pipeline of burning furnace and directly contact with installation pipe and the coal gas pipeline of burning furnace, when measuring temperature, reduce the loss in heat transfer process, can more accurately measure the temperature change of pipe inner wall, ensure the accuracy and sensitivity of temperature measurement.

[0012] Furthermore, compared with directly inserting the thermocouple through the installation hole into the coal gas pipeline of burning furnace, the utility model discloses hot -blast furnace coal gas pipeline burn through prevention monitoring devices, the thermocouple is installed in the installation pipe in the coal gas pipeline of burning furnace, the installation pipe also plays the role of protective cover, protects the thermocouple from being damaged by the gas in the coal gas pipeline of burning furnace, and simultaneously, after the installation pipe is sealed with the installation hole, the dismounting of the thermocouple does not affect the leakproofness of the coal gas pipeline of burning furnace, so that the thermocouple can be conveniently and flexibly dismounted and replaced.

[0013] The utility model discloses hot -blast furnace coal gas pipeline burn through prevention monitoring devices, the installation hole is set up in the bottom of the coal gas pipeline of burning furnace, the thermocouple is inserted into the installation pipe from the bottom of the coal gas pipeline of burning furnace, and the cold end and connecting wire of the thermocouple are located below the coal gas pipeline of burning furnace. Under the structure, when working, the high-temperature hot gas of the coal gas pipeline of burning furnace moves up, and the cold end and connecting wire of the thermocouple below the coal gas pipeline of burning furnace will not be accelerated aging and damaged due to the high-temperature hot gas of the coal gas pipeline of burning furnace, which not only guarantees the measurement stability of the thermocouple, but also greatly prolongs the service life of the thermocouple.

[0014] In addition, the utility model discloses hot -blast furnace coal gas pipeline burns the monitoring device of preventing burning through, the lower fixed mounting of coal gas pipeline of burning furnace has the heat insulating plate, the heat insulating plate's setting, one aspect, provides the support for the installation of thermocouple, makes thermocouple more easily install, another aspect still, the cold end of thermocouple and coal gas pipeline of burning furnace and the heat insulating plate of burning furnace have been isolated, guarantee the cold end of thermocouple and connecting wire will not be influenced by the high temperature of coal gas pipeline of burning furnace. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the main view structural schematic diagram of the utility model discloses hot -blast furnace coal gas pipeline burns the monitoring device of preventing burning through;

[0016] Fig. 2 It is the side view structural schematic diagram of the utility model discloses hot -blast furnace coal gas pipeline burns the monitoring device of preventing burning through not including hot -blast furnace;

[0017] Fig. 3 It is the local sectional view structural schematic diagram of the utility model discloses hot -blast furnace coal gas pipeline burns the monitoring device of preventing burning through. DETAILED DESCRIPTION

[0018] The utility model discloses hot -blast furnace coal gas pipeline burns the monitoring device of preventing burning through's preferable implementation mode is in detail explained below in conjunction with the drawings:

[0019] As Figs. 1 to 3 Shown, a kind of hot -blast furnace coal gas pipeline burns the monitoring device of preventing burning through, including with the communication of hot -blast furnace 100 of burning furnace coal gas pipeline 10, the coal gas combustion valve 101 is installed on the burning furnace coal gas pipeline 10, installation hole 102 is set up on the pipe wall of the bottom of the burning furnace coal gas pipeline 10, the installation hole 102 is located at the side of the coal gas combustion valve 101 away from hot -blast furnace 100, installation pipe 1 is inserted in the installation hole 102, the peripheral wall of the installation pipe 1 is sealedly installed with the inner wall of the installation hole 102, the one end of the installation pipe 1 that extends into the burning furnace coal gas pipeline 10 is closed blind end 11, the one end of the installation pipe 1 located at the outside of the burning furnace coal gas pipeline 10 is open end 12;Thermocouple 2 is inserted in the installation pipe 1, the thermocouple 2 has working end 21 and cold end 22, the working end 21 of the thermocouple 2 is located in the installation pipe 1, and the blind end 11 of the installation pipe 1 is top contact, the heat insulating plate 3 is fixedly installed below the burning furnace coal gas pipeline 10, the through hole 31 is set up on the heat insulating plate 3, the thermocouple 2 passes through the through hole 31 and is fixedly installed on the heat insulating plate 3, and the cold end 22 of the thermocouple 2 is located below the heat insulating plate 3.

[0020] The utility model discloses hot -blast furnace coal gas pipeline of burning furnace prevents burning through monitoring devices, the burning furnace coal gas pipeline 10 with the hot -blast furnace 100 intercommunication for the hot -blast furnace 100 provides gas, carries out burning furnace, the gas combustion valve 101 is installed on the burning furnace coal gas pipeline 10 for control the on-off of the burning furnace coal gas pipeline 10, wherein, when carrying out burning furnace to the hot -blast furnace 100, the gas combustion valve 101 opens, and the burning furnace coal gas pipeline 10 passes into the gas to the hot -blast furnace 100, after the hot -blast furnace 100 burning furnace is completed, before the blast air supply, the burning furnace coal gas pipeline 10 is closed.

[0021] The utility model discloses hot -blast furnace coal gas pipeline of burning furnace prevents burning through monitoring devices, the installation pipe 1 passes through the mounting hole 102 and extends to the burning furnace coal gas pipeline 10 in, although the mounting hole 102 is opened on the burning furnace coal gas pipeline 10, but the peripheral wall of installation pipe 1 and the inner wall of mounting hole 102 seal installation, and the one end of installation pipe 1 that extends to the burning furnace coal gas pipeline 10 in is the blind end 11 of closed, the mounting hole 102 and the installation pipe 1 all can not form the leakage point, still form the closed pipeline in the burning furnace coal gas pipeline 10, can guarantee normal work.

[0022] The utility model discloses hot -blast furnace coal gas pipeline of burning furnace prevents burning through monitoring devices, the installation pipe 1 extends to the one end in the burning furnace coal gas pipeline 10 and is the blind end 11 of closed, and the one end of installation pipe 1 that is located the burning furnace coal gas pipeline 10 outside is the open end 12, and the installation pipe 1 is provided for the installation condition that the thermocouple 2 extends to the burning furnace coal gas pipeline 10 provides, the thermocouple 2 inserts the burning furnace coal gas pipeline 10, and the working end 21 of thermocouple 2 is located in the installation pipe 1, and the blind end 11 of installation pipe 1 is top contact, and the thermocouple 2 is used to detect the temperature signal in the burning furnace coal gas pipeline 10, the heat insulating plate 3 is installed below the burning furnace coal gas pipeline 10, is used for fixing the thermocouple 2, and is used for the heat insulation of cold end 22 of the thermocouple 2.

[0023] The utility model discloses hot -blast furnace coal gas pipeline of burning furnace prevents burning through monitoring devices, the thermocouple 2 real -time response monitoring temperature signal in the burning furnace coal gas pipeline 10, according to the temperature change of response detection of the thermocouple 2, judges the gas combustion valve 101 whether is closed tight in the process of the blast air supply after the hot -blast furnace 100 burning furnace is completed, the burning furnace coal gas pipeline 10 whether there is the risk of burning through, thus, realize monitoring to the burning furnace coal gas pipeline 10, prevent the burning furnace coal gas pipeline 10 from being burnt through.

[0024] The utility model hot -blast furnace coal gas pipeline of burning prevent burning through monitoring devices, through installing the thermocouple 2 on the coal gas pipeline of burning 10, real -time monitoring the temperature change of coal gas pipeline of burning 10 and in it, when the temperature of coal gas pipeline of burning 10 and in it is abnormally high, show that the coal gas combustion valve 101 possibly close not strictly, lead to the hot blast of hot -blast furnace 100 to the coal gas pipeline of burning 10 in the leakage, and the coal gas pipeline of burning 10 is eroded.

[0025] The utility model hot -blast furnace coal gas pipeline of burning prevent burning through monitoring devices, when installing the thermocouple 2, through setting up the installation hole 102 on the pipe wall of the bottom of coal gas pipeline of burning 10, then inserting the installation pipe 1 with one end is blind end 11 in the installation hole 102, the peripheral wall of installation pipe 1 is sealed with the inner wall of installation hole 102, the sealing structure between installation pipe 1 and installation hole 102 and the setting of blind end 11 of installation pipe 1 guarantee the sealing property of coal gas pipeline of burning 10, and coal gas pipeline of burning 10 does not have leakage point because of the setting of installation hole 102 and installation pipe 1, and then influence normal work. Under the condition that guarantee coal gas pipeline of burning 10 can work normally, the structure that installation pipe 1 extends into coal gas pipeline of burning 10, on the one hand, provides the space of insertion for the thermocouple 2, makes the thermocouple 2 can be installed, on the other hand, installation pipe 1 and the thermocouple 2 in it extend into coal gas pipeline of burning 10, close to the inside of coal gas pipeline of burning 10, at the same time, the working end 21 of thermocouple 2 is in contact with the blind end 11 of installation pipe 1, and the thermocouple 2 in the inside of coal gas pipeline of burning 10 and directly contact installation pipe 1 and coal gas pipeline of burning 10, when measuring temperature, reduce the loss in heat transfer process, can more accurately measure the temperature change of pipe inner wall, ensure the accuracy and sensitivity of temperature measurement.

[0026] Furthermore, compared with the structure that the thermocouple is directly inserted into the furnace gas pipeline through the mounting hole, the hot blast furnace furnace gas pipeline anti-burning monitoring device, after the thermocouple 2 is installed in the mounting pipe 1 in the furnace gas pipeline 10, the mounting pipe 1 also plays the role of a protective cover, and the thermocouple 2 is protected from being damaged by the gas in the furnace gas pipeline 10; meanwhile, after the mounting pipe 1 is sealed with the mounting hole 102, the disassembly and assembly of the thermocouple 2 will not affect the sealing performance of the furnace gas pipeline 10, and the flexible disassembly and assembly and replacement of the thermocouple 2 can be greatly facilitated.

[0027] The hot blast furnace furnace gas pipeline anti-burning monitoring device, the mounting hole 102 is arranged at the bottom of the furnace gas pipeline 10, the thermocouple 2 is inserted into the mounting pipe 1 from the bottom of the furnace gas pipeline 10, and the cold end 22 and the connecting wire of the thermocouple 2 are located below the furnace gas pipeline 10. In this structure, during work, the high-temperature hot gas of the furnace gas pipeline 10 moves upwards, and the cold end 22 and the connecting wire of the thermocouple 2 located below the furnace gas pipeline 10 will not be accelerated aging and damaged due to the high-temperature hot gas moving upwards of the furnace gas pipeline 10, thereby ensuring the measurement stability of the thermocouple 2 and greatly prolonging the service life of the thermocouple 2.

[0028] In addition, the hot blast furnace furnace gas pipeline anti-burning monitoring device, the heat insulation plate 3 is fixedly installed below the furnace gas pipeline 10, the heat insulation plate 3 is provided, on one hand, to provide a support for the installation of the thermocouple 2, so that the thermocouple 2 is more easily installed, and on the other hand, the furnace gas pipeline 10 and the cold end 22 of the thermocouple 2 are isolated, so that the cold end 22 and the connecting wire of the thermocouple 2 are not affected by the high temperature of the furnace gas pipeline 10.

[0029] The hot blast furnace furnace gas pipeline anti-burning monitoring device, preferably, the bottom of the heat insulation plate 3 is fixedly installed with a clamp 4, and the thermocouple 2 is clamped on the clamp 4. The thermocouple 2 is fixedly installed on the heat insulation plate 3 through the clamp 4 fixedly installed on the heat insulation plate 3. Compared with the direct fixation of the thermocouple 2 and the heat insulation plate 3, the fixation through the clamp 4 and the heat insulation plate 3 is more flexible and convenient to operate.

[0030] The hot blast furnace furnace gas pipeline anti-burning monitoring device, the inner diameter of the mounting pipe 1 is consistent with the diameter of the thermocouple 2. This arrangement can increase the heating surface of the thermocouple 2, so that the thermocouple 2 can be more sensitive and the measurement sensitivity is higher.

[0031] The utility model discloses to the ordinary skilled person in the technical field to which the utility model belongs, under the premise of not departing from the utility model concept, still can make several simple deductions or replace, all should be regarded as belonging to the protection scope of the utility model.

Claims

1. A device for monitoring the anti-burn-through of a stove gas pipeline of a hot blast stove, comprising a stove gas pipeline in communication with the hot blast stove, a gas combustion valve being installed on the stove gas pipeline, characterized in that: The installation hole is located on the side of the gas combustion valve away from the hot blast furnace, an installation pipe is inserted into the installation hole, the peripheral wall of the installation pipe is sealingly installed with the inner wall of the installation hole, the end of the installation pipe inserted into the stove gas pipeline is a closed blind end, and the end of the installation pipe located outside the stove gas pipeline is an open end; a thermocouple is inserted into the installation pipe, the thermocouple has a working end and a cold end, the working end of the thermocouple is located in the installation pipe and is in contact with the blind end of the installation pipe, a heat insulation plate is fixedly installed below the stove gas pipeline, a through hole is formed in the heat insulation plate, the thermocouple passes through the through hole and is fixedly installed on the heat insulation plate, and the cold end of the thermocouple is located below the heat insulation plate.

2. The device according to claim 1, characterized in that: A clamp is fixedly installed on the bottom of the heat insulation plate, and the thermocouple is clamped on the clamp.

3. The device according to claim 1, characterized in that: The inner diameter of the installation pipe and the diameter of the thermocouple in the installation pipe are consistent.

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