CN221028519U - Long-distance blast furnace hydrogen-rich smelting and blowing system - Google Patents
Long-distance blast furnace hydrogen-rich smelting and blowing system Download PDFInfo
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- CN221028519U CN221028519U CN202322603303.XU CN202322603303U CN221028519U CN 221028519 U CN221028519 U CN 221028519U CN 202322603303 U CN202322603303 U CN 202322603303U CN 221028519 U CN221028519 U CN 221028519U
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 44
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 44
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000003723 Smelting Methods 0.000 title claims abstract description 24
- 238000007664 blowing Methods 0.000 title claims description 17
- 239000007789 gas Substances 0.000 claims abstract description 221
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000000571 coke Substances 0.000 description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a long-distance blast furnace hydrogen-rich smelting injection system, which comprises a nitrogen security module, a gas production module, a gas pressurized transportation module, a real-time gas transportation monitoring module and a gas injection module, wherein the nitrogen security module is used for performing self protection on the system when blast furnace gas leaks and/or flows back, and the gas production module, the gas pressurized transportation module, the real-time gas transportation monitoring module and the gas injection module are sequentially arranged along the conveying direction of blast furnace gas. The safety control unit is used for controlling the opening and closing of the pneumatic check valve and the pneumatic quick-opening valve according to the operation parameters of the CO monitor and the flowmeter. The gas injection module is provided with a gas surrounding pipe, a blast furnace and N injection units which are uniformly distributed between the gas surrounding pipe and the blast furnace, one end of any one injection unit is communicated with the gas surrounding pipe, and the other end of any one injection unit is communicated with the blast furnace. The long-distance blast furnace hydrogen-rich smelting injection system has the characteristic of uniform injection distribution of gas in the blast furnace, and can perform self-protection when the gas in the blast furnace leaks or flows back.
Description
Technical Field
The utility model relates to the technical field of blast furnace smelting, in particular to a long-distance blast furnace hydrogen-rich smelting and blowing system.
Background
The steel industry is an energy resource consumption intensive industry, the global ton steel carbon emission intensity in 2020 is about 1.89t, and the carbon emission amount accounts for about 7% of the global energy system emission amount. The pre-iron process is the process with highest energy consumption and largest pollutant emission in steel production, and comprises a coking process, a sintering process and a blast furnace process. The energy consumption of the pre-iron process accounts for about 90% of the total energy consumption of steel production, and the pollutant emission accounts for more than 90% of the total emission. The blast furnace process is a continuous process for reducing iron ore into pig iron, and is specifically a process in which solid raw materials such as iron ore, coke, and solvent in a predetermined ratio are fed into a blast furnace in batches, and at a high temperature, the iron ore is gradually reduced to iron and slag, and the iron ore is melted into iron and slag and periodically discharged from a hearth. The blast furnace procedure occupies more than 70% of the total energy consumption of the whole iron pre-procedure because of larger specific gravity of energy consumption.
In order to reduce the energy consumption and the carbon emission of the blast furnace process, the blast furnace process is generally realized by adopting a hydrogen-rich reduction smelting mode in the prior art. The main way of realizing hydrogen-rich reduction smelting of the blast furnace is to arrange two symmetrical spray guns at the tuyere of the blast furnace hearth, and blast furnace gas consisting of pure hydrogen or hydrogen-rich gas such as hydrogen, natural gas, coke oven gas and the like is blown to the two symmetrical spray guns. Because the coke oven gas is blown to reduce the combustion temperature of the tuyere, the coke oven gas blowing amount of each spray gun needs to be ensured to be as uniform as possible, and the two symmetrical spray gun modes are arranged at the tuyere of the blast furnace hearth, so that the blowing blast furnace gas can meet the blowing pressure of the blast furnace gas, but the blast furnace gas is unevenly distributed, and when one of the blast furnace gas is damaged, the blast furnace gas is seriously unevenly distributed, so that the damaged spray gun is required to be maintained by stopping the blast furnace process, and the production efficiency is affected. In addition, the blast furnace gas is inflammable and explosive toxic gas transported under high temperature and high pressure, and dangerous accidents are easily caused when leakage occurs in the transportation process or the blast furnace gas flows back due to unexpected furnace conditions.
Disclosure of utility model
Accordingly, it is necessary to provide a long-distance blast furnace hydrogen-rich smelting injection system, which has the characteristic of uniform gas injection distribution in the blast furnace and can perform self-protection when the blast furnace gas leaks or flows back.
The utility model provides a long-distance blast furnace hydrogen-rich smelting injection system, which comprises a nitrogen security module, a gas production module, a gas pressurized transportation module, a real-time gas transportation monitoring module and a gas injection module, wherein the nitrogen security module is used for performing self protection on the system when blast furnace gas leaks and/or flows back;
The inlet of the gas pressurized transportation module is connected with the outlet of the gas production module, the real-time gas transportation monitoring module is arranged at the outlet of the gas pressurized transportation module, the inlet of the gas injection module is connected with the outlet of the gas pressurized transportation module, and the outlet of the nitrogen security module is connected with the outlet of the gas pressurized transportation module;
The nitrogen safety module is provided with a CO monitor and a safety control unit which are positioned in the working environment of the system, and a pneumatic quick-opening valve which is positioned at the outlet end of the nitrogen safety module, the real-time gas transportation monitoring module is provided with a flowmeter for monitoring the gas flow rate at the outlet of the gas pressurizing module, the outlet end of the gas pressurizing transportation module is provided with a pneumatic check valve, and the CO monitor, the flowmeter, the pneumatic quick-opening valve and the pneumatic check valve are all electrically connected with the safety control unit;
the safety control unit is used for controlling the opening and closing of the pneumatic check valve and the pneumatic quick-opening valve according to the operation parameters of the CO monitor and the flowmeter;
The gas injection module is provided with a gas enclosure pipe, a blast furnace and N injection units positioned between the gas enclosure pipe and the blast furnace, the gas enclosure pipe is sleeved on the outer side of a blast furnace tuyere, and the N injection units are uniformly distributed between the gas enclosure pipe and the blast furnace, wherein N is more than or equal to 10;
one end of any one of the blowing units is communicated with the gas enclosing pipe, and the other end is communicated with the blast furnace.
In one embodiment, the inlet end of the gas injection module is further provided with a hydrogen-rich intelligent control unit and a pressure regulating valve, the inlet of the hydrogen-rich intelligent control unit is connected with the outlet of the real-time gas transportation monitoring module, the inlet of the pressure regulating valve is connected with the outlet of the hydrogen-rich intelligent control unit, the outlet of the pressure regulating valve is communicated with the inlet of the gas enclosure pipe, and the hydrogen-rich intelligent control unit is used for acquiring the wind temperature and wind pressure in the blast furnace and controlling the opening of the pressure regulating valve according to the wind temperature and the wind pressure.
In one embodiment, the injection unit is sequentially provided with a branch pipe pneumatic cut-off valve, a branch pipe manual cut-off valve, a spray gun and an air supply branch pipe along the direction from the gas enclosure pipe to the blast furnace, wherein the branch pipe pneumatic cut-off valve is connected with the gas enclosure pipe, and the air supply branch pipe is connected with the blast furnace.
In one embodiment, the nitrogen security module is further provided with a nitrogen tank, and a first stop valve and a second stop valve respectively connected to an inlet end and an outlet end of the nitrogen tank, and the second stop valve is connected with the pneumatic quick-opening valve.
In one embodiment, the gas production module is provided with a gas supply unit, an inlet butterfly valve and an inlet blind plate valve, and the inlet butterfly valve is connected between the gas supply unit and the inlet blind plate valve.
In one embodiment, the gas pressurizing and transporting module is further provided with a gas pressurizing machine, an outlet butterfly valve, an outlet blind plate valve, a pneumatic quick-cutting valve and a flame arrester, wherein the gas pressurizing machine, the outlet butterfly valve, the outlet blind plate valve, the pneumatic quick-cutting valve and the flame arrester are sequentially connected, an inlet of the gas pressurizing machine is connected with the inlet blind plate valve, and the flame arrester is connected with the pneumatic check valve.
In one embodiment, the real-time gas transportation monitoring module is further provided with a pressure transmitter for monitoring the outlet gas pressure of the gas pressurizing module and a thermometer for monitoring the outlet gas temperature of the gas pressurizing module.
In one embodiment, the hydrogen-rich intelligent control unit is provided with a display screen for displaying the carbon reduction amount of the system.
The beneficial effects of the utility model are as follows:
(1) The safety control unit in the utility model can judge whether the blast furnace gas leaks and/or flows back according to the operation parameters of the CO monitor and the flowmeter, and when the leakage and/or the flow back occurs, the pneumatic check valve is controlled to be closed, the pneumatic quick-opening valve is opened, and nitrogen is filled into the blast furnace to realize the protection of the system.
(2) According to the utility model, the gas surrounding pipe is arranged at the blast furnace tuyere, and the plurality of uniformly distributed blowing units are arranged between the gas surrounding pipe and the blast furnace to blow the hydrogen-rich gas into the blast furnace, so that the uniformly distributed gas can be blown into the blast furnace, and the gas does not need to be replaced immediately when a small amount of the blowing units are damaged, so that the production continuity can be ensured.
Drawings
Fig. 1 is a schematic structural diagram of a long-distance blast furnace hydrogen-rich smelting injection system provided by an embodiment of the utility model.
Reference numerals illustrate: 1. a gas supply unit; 2. an inlet butterfly valve; 3. an inlet blind plate valve; 4. a gas pressurizing machine; 5. an outlet butterfly valve; 6. an outlet blind plate valve; 7. a pneumatic quick-cut valve; 8. a flame arrester; 9. a pneumatic check valve; 10. a pressure transmitter; 11. a flow meter; 12. a thermometer; 13. a gas pipe; 14. a hydrogen-rich intelligent control unit; 15. a pressure regulating valve; 16. a first stop valve; 17. a nitrogen tank; 18. a second shut-off valve; 19. pneumatic quick-opening valve; 20. the branch pipe is manually cut off; 21. pneumatic shutoff valve of branch pipe; 22. a blast furnace; 23. an air supply branch pipe; 24. a spray gun; 25. a gas enclosure pipe; 26. a security control unit; 27. a CO monitor.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.
It should be noted that, in the description of the present utility model, the terms "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the orientation or positional relationship shown in fig. 1, and it should be understood that these terms are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In one embodiment, as shown in fig. 1, fig. 1 is a schematic structural diagram of a long-distance blast furnace hydrogen-rich smelting and injection system provided by the embodiment of the utility model, and the long-distance blast furnace hydrogen-rich smelting and injection system in the embodiment comprises a nitrogen protection module for self-protecting the system when blast furnace gas leaks and/or flows back, and a gas production module, a gas pressurized transportation module, a real-time gas transportation monitoring module and a gas injection module which are sequentially arranged along the conveying direction of the blast furnace gas.
In the embodiment, coke oven gas subjected to refinement treatment in a coke oven plant is adopted as blast furnace gas, the composition table of the coke oven gas is shown in table 1, the hydrogen content in the blast furnace gas is 40% -50%, the reduction speed of iron ore in the furnace can be accelerated, the production efficiency is improved, the consumption of solid fuel in the furnace can be fundamentally reduced, the emission of pollutants and CO2 is reduced, and low-carbon metallurgy is realized.
TABLE 1 blast furnace gas composition table
The inlet of the gas pressurized transportation module is connected with the outlet of the gas production module, the real-time gas transportation monitoring module is arranged at the outlet of the gas pressurized transportation module, the inlet of the gas injection module is connected with the outlet of the gas pressurized transportation module, and the outlet of the nitrogen security module is connected with the outlet of the gas pressurized transportation module.
Specifically, the gas production module is used for producing and providing blast furnace gas, the gas pressurizing and transporting module is used for pressurizing the blast furnace gas, so that the gas can be ensured to fully enter the blast furnace 22, and the real-time gas transporting and monitoring module is used for monitoring the transportation condition of the pressurized blast furnace gas in real time.
In this embodiment, the nitrogen gas safety module is provided with a CO monitor 27 and a safety control unit 26 located in the system working environment, and a pneumatic quick-opening valve 19 located at the outlet end of the nitrogen gas safety module, the real-time gas transportation monitoring module is provided with a flow meter 11 for monitoring the gas flow rate at the outlet of the gas pressurizing module, the outlet end of the gas pressurizing transportation module is provided with a pneumatic check valve 9, and the CO monitor 27, the flow meter 11, the pneumatic quick-opening valve 19 and the pneumatic check valve 9 are all electrically connected with the safety control unit 26.
The safety control unit 26 is used for controlling the opening and closing of the pneumatic check valve 9 and the pneumatic quick-opening valve 19 according to the operation parameters of the CO monitor 27 and the flowmeter 11. When the safety control unit 26 has leakage or backflow, the safety control module controls the pneumatic check valve 9 to be closed, the pneumatic quick-opening valve 19 to be opened, and nitrogen is filled in the blast furnace 22 to realize the protection of the system. In addition, during the damping down of the blast furnace 22 or the stopping of the fan, the nitrogen is adopted to replace and empty the coke oven gas in the system, so that the system is further protected.
The gas leakage parameter is provided by the CO monitor 27, the CO monitor 27 detects that the CO in the environment where the system is located exceeds the standard, the security control unit 26 judges that the value of the CO monitor 27 exceeds the set threshold range, and the security control module controls the pneumatic check valve 9 to be closed and the pneumatic quick-opening valve 19 to be opened. The gas reflux parameter is provided by the flowmeter 11, when the number of the flowmeter 11 is a negative value, the transportation gas reflux in the system is described, the safety control module controls the pneumatic check valve 9 to be closed, and the pneumatic quick-opening valve 19 to be opened.
In the embodiment, the gas injection module is provided with a gas enclosure pipe 25, a blast furnace 22 and N injection units positioned between the gas enclosure pipe 25 and the blast furnace 22, wherein the gas enclosure pipe 25 is sleeved on the outer side of a tuyere of the blast furnace 22, the N injection units are uniformly distributed between the gas enclosure pipe 25 and the blast furnace 22, and N is more than or equal to 10. One end of any one of the blowing units is communicated with the gas enclosure pipe 25, and the other end is communicated with the blast furnace 22. N=26 is preferable in this embodiment.
Specifically, the gas enclosure pipe 25 in this embodiment is preferably an annular enclosure pipe, which surrounds the generated gas around the blast furnace 22, and after the coke oven gas enters the gas enclosure pipe 25, further distribution and adjustment are performed in the gas enclosure pipe 25, preparation for injection is performed, and then the gas enters each injection unit to be supplied to the combustion zone in the blast furnace 22. A plurality of evenly distributed blowing units are arranged between the annular surrounding pipe and the air opening of the blast furnace 22 to blow hydrogen-rich gas into the blast furnace 22, and the plurality of evenly distributed blowing units can enable the blown gas to be evenly distributed in the blast furnace 22. And when a small amount of blowing units are damaged, production stopping and replacement are not needed, so that the production continuity of the blast furnace 22 is ensured, and the production efficiency is improved.
It should be noted that the gas enclosure 25 needs to have good sealing performance, and that the gas enclosure 25 needs to have certain corrosion resistance and high temperature resistance due to the severe nature of the smelting environment of the blast furnace 22. Therefore, the service life of the enclosing pipe can be prolonged, and the stability and reliability of the enclosing pipe in a high-temperature and corrosion environment are ensured.
In one embodiment, the inlet end of the gas injection module is further provided with a hydrogen-rich intelligent control unit 14 and a pressure regulating valve 15, the inlet of the hydrogen-rich intelligent control unit 14 is connected with the outlet of the real-time gas transportation monitoring module, the inlet of the pressure regulating valve 15 is connected with the outlet of the hydrogen-rich intelligent control unit 14, the outlet of the pressure regulating valve 15 is communicated with the inlet of the gas enclosure pipe 25, and the hydrogen-rich intelligent control unit 14 is used for obtaining the air temperature and the air pressure in the blast furnace 22 and controlling the opening of the pressure regulating valve 15 according to the air temperature and the air pressure.
In one embodiment, the blowing unit is provided with a branch pipe pneumatic cut-off valve 21, a branch pipe manual cut-off valve 20, a spray gun 24 and an air supply branch pipe 23 sequentially connected along the direction from the gas enclosure pipe 25 to the blast furnace 22, wherein the branch pipe pneumatic cut-off valve 21 is connected with the gas enclosure pipe 25, and the air supply branch pipe 23 is connected with the blast furnace 22.
The lance 24 is a device that mixes coke oven gas and air and injects the same into the blast furnace 22. The lance 24 is typically comprised of a nozzle, lance 24 tube and associated equipment. Coke oven gas enters the nozzle from the gas enclosure 25, while air enters the lance 24 from the supply branch 23. After mixing in the lance 24, the two are injected into the blast furnace 22 through a nozzle. The blast branch pipe 23 is an important part for injecting coke oven gas from the lance 24 into the blast furnace 22. The branch pipe manual shutoff valve 20 is used to manually shut off the supply of gas. The valve needs to be closed or opened by a manual operation before starting or stopping the injection of coke oven gas.
The branch pipe pneumatic shut-off valve 21 is located between the branch pipe and the gas enclosure pipe 25 for controlling the flow of gas. The valve is controlled to be opened and closed by a pneumatic device through an air source signal so as to control the flow rate of the gas and the blowing time.
In one embodiment, the nitrogen security module is further provided with a nitrogen tank 17 and a first stop valve 16 and a second stop valve 18 connected to an inlet end and an outlet end of the nitrogen tank 17, respectively, and the second stop valve 18 is connected to a pneumatic quick-opening valve 19.
Specifically, when the nitrogen tank 17 is filled with nitrogen, the first shut-off valve 16 is opened, the second shut-off valve 18 is closed, and after the nitrogen filling is completed, the first shut-off valve 16 is closed, and the second shut-off valve 18 is opened.
In one embodiment, the gas production module is provided with a gas supply unit 1, an inlet butterfly valve 2 and an inlet blind plate valve 3, and the inlet butterfly valve 2 is connected between the gas supply unit 1 and the inlet blind plate valve 3. The inlet butterfly valve 2 is used for controlling and adjusting the flow speed and pressure of the coke oven gas, and can be realized by adjusting the opening of the butterfly valve when the conveying amount of the coke oven gas needs to be increased or reduced. The inlet blind plate valve 3 is used for closing a pipeline and cutting off the flow of coke oven gas, and the blind plate valve is used in maintenance, overhaul or emergency, so that the pipeline can be isolated and the safety of operators can be ensured.
In an alternative embodiment, the gas pressurization transportation module is further provided with a gas pressurization machine 4, an outlet butterfly valve 5, an outlet blind plate valve 6, a pneumatic quick-cutting valve 7 and a flame arrester 8, wherein the gas pressurization machine 4, the outlet butterfly valve 5, the outlet blind plate valve 6, the pneumatic quick-cutting valve 7 and the flame arrester 8 are sequentially connected, an inlet of the gas pressurization machine 4 is connected with the inlet blind plate valve 3, and the flame arrester 8 is connected with the pneumatic check valve 9.
Among them, coke oven gas is an important energy source and reducing agent for the blast furnace 22 smelting. The gas pressurizing machine 4 ensures that the gas meets or exceeds the pressure requirement required by the gas injection module by increasing the pressure of the coke oven gas so as to ensure that the gas can fully enter the blast furnace 22, thus improving the smelting effect of the blast furnace 22 and ensuring the stability of the quality and the yield of molten iron. And, pressurizing the blast furnace gas can improve the transportation efficiency of the gas. The flame arrestor 8 is a safety device used in the operation of a coke oven and mainly serves to prevent the reverse flow of gas in the coke oven and cause a fire or explosion. The pneumatic quick-cut valve 7 plays an important role in rapidly cutting off the flow of the coke oven gas, preventing backflow and backflow phenomena and controlling and regulating the flow of the coke oven gas in the system. The system can improve the safety and the controllability of the system and ensure the normal transportation and the utilization of coke oven gas.
Specifically, the equipment type parameters of the gas pressurizing machine 4 specifically used in this example are shown in table 2.
Table 2 gas compressor plant selection parameters
In an alternative embodiment, the real-time gas transportation monitoring module is further provided with a pressure transmitter 10 for monitoring the gas pressure at the outlet of the gas pressurizing module and a thermometer 12 for monitoring the gas temperature at the outlet of the gas pressurizing module. The pressure transmitter 10 is a device for measuring and monitoring the pressure of gas, which converts the pressure of gas in a pipe into a corresponding electrical signal to be output, so as to realize the monitoring of the pressure of gas.
It should be noted that, in the present utility model, except for the parts connected to the control unit and the connection between the three parts of the real-time gas monitoring module and the gas pressurizing module, the connection between the other parts is all connected through the gas pipe 13.
In one embodiment, the hydrogen-rich intelligent control unit 14 is provided with a display screen for displaying the amount of carbon reduction of the system. The hydrogen-rich intelligent control unit 14 performs calculation of the hydrogen injection carbon reduction amount of the blast furnace 22 by utilizing the data learning and derivative iteration functions, so that the carbon reduction amount and the carbon emission amount of the blast furnace 22 are counted, the calculated amounts are displayed on a display screen, and real-time data are provided for implementing the carbon peak decision.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.
Claims (8)
1. The long-distance blast furnace hydrogen-rich smelting injection system is characterized by comprising a nitrogen security module, a gas production module, a gas pressurized transportation module, a real-time gas transportation monitoring module and a gas injection module, wherein the nitrogen security module is used for performing self protection on the system when blast furnace gas leaks and/or flows back, and the gas production module, the gas pressurized transportation module, the real-time gas transportation monitoring module and the gas injection module are sequentially arranged along the conveying direction of the blast furnace gas;
the inlet of the gas pressurized transportation module is connected with the outlet of the gas production module, the real-time gas transportation monitoring module is arranged at the outlet of the gas pressurized transportation module, the inlet of the gas injection module is connected with the outlet of the gas pressurized transportation module, and the outlet of the nitrogen security module is connected with the outlet of the gas pressurized transportation module;
The nitrogen safety module is provided with a CO monitor (27) and a safety control unit (26) which are positioned in a system working environment, and a pneumatic quick-opening valve (19) which is positioned at the outlet end of the nitrogen safety module, the real-time gas transportation monitoring module is provided with a flowmeter (11) for monitoring the gas flow rate at the outlet of the gas pressurizing module, the outlet end of the gas pressurizing transportation module is provided with a pneumatic check valve (9), and the CO monitor (27), the flowmeter (11), the pneumatic quick-opening valve (19) and the pneumatic check valve (9) are electrically connected with the safety control unit (26);
the safety control unit (26) is used for controlling the opening and closing of the pneumatic check valve (9) and the pneumatic quick-opening valve (19) according to the operation parameters of the CO monitor (27) and the flowmeter (11);
The gas injection module is provided with a gas surrounding pipe (25), a blast furnace (22) and N injection units positioned between the gas surrounding pipe (25) and the blast furnace (22), wherein the gas surrounding pipe (25) is sleeved on the outer side of a tuyere of the blast furnace (22), the N injection units are uniformly distributed between the gas surrounding pipe (25) and the blast furnace (22), and N is more than or equal to 10;
One end of any one of the blowing units is communicated with a gas surrounding pipe (25), and the other end is communicated with a blast furnace (22).
2. The long-distance blast furnace hydrogen-rich smelting injection system according to claim 1, wherein the inlet end of the gas injection module is further provided with a hydrogen-rich intelligent control unit (14) and a pressure regulating valve (15), the inlet of the hydrogen-rich intelligent control unit (14) is connected with the outlet of the real-time gas transportation monitoring module, the inlet of the pressure regulating valve (15) is connected with the outlet of the hydrogen-rich intelligent control unit (14), the outlet of the pressure regulating valve (15) is communicated with the inlet of the gas surrounding pipe (25), and the hydrogen-rich intelligent control unit (14) is used for acquiring wind temperature and wind pressure in the blast furnace (22) and controlling the opening of the pressure regulating valve (15) according to the wind temperature and the wind pressure.
3. The long-distance blast furnace hydrogen-rich smelting injection system according to claim 2, wherein the injection unit is sequentially provided with a branch pipe pneumatic cut-off valve (21), a branch pipe manual cut-off valve (20), a spray gun (24) and an air supply branch pipe (23) along the direction from a gas surrounding pipe (25) to a blast furnace (22), the branch pipe pneumatic cut-off valve (21) is connected with the gas surrounding pipe (25), and the air supply branch pipe (23) is connected with the blast furnace (22).
4. A long distance blast furnace hydrogen-rich smelting injection system according to claim 3, wherein the nitrogen security module is further provided with a nitrogen tank (17) and a first stop valve (16) and a second stop valve (18) connected to an inlet end and an outlet end of the nitrogen tank (17), respectively, the second stop valve (18) being connected to the pneumatic quick opening valve (19).
5. The long-distance blast furnace hydrogen-rich smelting injection system according to claim 4, wherein the gas production module is provided with a gas supply unit (1), an inlet butterfly valve (2) and an inlet blind plate valve (3), and the inlet butterfly valve (2) is connected between the gas supply unit (1) and the inlet blind plate valve (3).
6. The long-distance blast furnace hydrogen-rich smelting and blowing system according to claim 5, wherein the gas pressurizing and transporting module is further provided with a gas pressurizing machine (4), an outlet butterfly valve (5), an outlet blind plate valve (6), a pneumatic quick-cutting valve (7) and a flame arrester (8), the gas pressurizing machine (4), the outlet butterfly valve (5), the outlet blind plate valve (6), the pneumatic quick-cutting valve (7) and the flame arrester (8) are sequentially connected, an inlet of the gas pressurizing machine (4) is connected with the inlet blind plate valve (3), and the flame arrester (8) is connected with a pneumatic check valve (9).
7. The long-distance blast furnace hydrogen-rich smelting injection system according to claim 6, wherein the real-time gas transportation monitoring module is further provided with a pressure transmitter (10) for monitoring the gas pressure at the outlet of the gas pressurizing module and a thermometer (12) for monitoring the gas temperature at the outlet of the gas pressurizing module.
8. The long-distance blast furnace hydrogen-rich smelting injection system according to claim 7, wherein the hydrogen-rich intelligent control unit (14) is provided with a display screen for displaying the carbon reduction amount of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322603303.XU CN221028519U (en) | 2023-09-25 | 2023-09-25 | Long-distance blast furnace hydrogen-rich smelting and blowing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322603303.XU CN221028519U (en) | 2023-09-25 | 2023-09-25 | Long-distance blast furnace hydrogen-rich smelting and blowing system |
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