CN211199264U - Gas circulation and back-distribution device for Europe and metallurgy furnace - Google Patents
Gas circulation and back-distribution device for Europe and metallurgy furnace Download PDFInfo
- Publication number
- CN211199264U CN211199264U CN201921911400.2U CN201921911400U CN211199264U CN 211199264 U CN211199264 U CN 211199264U CN 201921911400 U CN201921911400 U CN 201921911400U CN 211199264 U CN211199264 U CN 211199264U
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- Prior art keywords
- gas
- compressor
- furnace
- cooling tower
- return pipe
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- 238000005272 metallurgy Methods 0.000 title description 21
- 238000009826 distribution Methods 0.000 title description 3
- 239000003034 coal gas Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000010248 power generation Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 230000000740 bleeding effect Effects 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 241001062472 Stokellia anisodon Species 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 46
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 101150113941 trt1 gene Proteins 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses an Ou smelt furnace gas circulation blending device, including blast furnace gas excess pressure turbine power generation device TRT, compressor, cooling tower and surge-proof valve, turbine power generation device TRT and four valves of a pressure regulating connect in parallel together with the coal gas output tube of Ou smelt furnace and link to each other, the gas recovery unit and cooling tower are being connected to TRT and the gas outlet end of four valves of pressure regulating, the outlet duct of cooling tower loops through into the coal gas and cuts off and diffuse the valves and link to each other with the compressor, the compressor cuts off and diffuses the valves through going out the coal gas and links to each other with Ou smelt furnace; the compressor is also connected with a return pipe provided with an anti-surge valve, the return pipe is communicated with the cooling tower, the gas outlet cut-off and release valve group is also connected with a return pipe provided with a fault return control valve, and the return pipe is also communicated with the cooling tower. The device can improve the technology of the Ou-Meta furnace, reduce the production cost of the Ou-Meta furnace and improve the quality of molten iron.
Description
Technical Field
The utility model relates to a euro-metallurgical furnace gas circulation backmixing device, its effect is to circulate the backmixing into euro-metallurgical furnace gasification furnace through this device with some euro-metallurgical furnace gas for reaching.
Background
The forebody of the Europe and metallurgy furnace is a COREX furnace, which is the most advanced COREX in the world, is transformed from Bao steel Lujing to eight steel through a series of process technologies, has the technical characteristics of the process, and is called the Europe and metallurgy furnace. The Ou metallurgical furnace mainly uses oxygen as combustion-supporting gas, coke is combusted by mainly relying on the oxygen to enter the gasification furnace from a tuyere, reducing gas is generated and heat is generated after combustion, if pure oxygen is fed into the furnace in a unilateral mode, the problems of insufficient coal gas amount in the furnace, uneven heat distribution in the furnace, insufficient reduction heat of furnace charge, insufficient reducing atmosphere and the like are caused, and meanwhile, the theoretical combustion temperature in front of the tuyere is high, molten iron is high in silicon content, high in coke ratio, low in cost and the like. Therefore, in order to solve the above problems, the eustachian furnace adopts a tuyere nitrogen adding group device and a compressed air adding group to reduce the combustion temperature at the front end of the tuyere and reduce the tuyere breakage so as to reduce the concentration of oxygen. However, the problem of adding nitrogen is that: the consumption of nitrogen is large, the preparation of nitrogen needs special equipment and facilities, and the preparation cost is high. Problems with adding compressed air: although the problem that the theoretical combustion temperature of the tuyere is higher is relieved, the problem cannot be thoroughly solved, and meanwhile, the nitrogen content in the compressed air is higher, so that the reducing atmosphere of the coal gas is reduced, the fuel ratio is higher, and the reduction of the smelting cost is seriously restricted.
Disclosure of Invention
In order to solve the Europe and smelt stove nitrogen consumption big, the theoretical combustion temperature in wind gap is high, the molten iron contains silicon highly, and the wind gap is fragile, this difficult problem that smelting cost is higher, the utility model provides an Europe and smelt stove gas circulation blending device, this device simple manufacture, convenient operation adopts the compressor as the power supply, through the implementation of this device, perfects Europe and smelt stove technology, reduces Europe and smelt stove manufacturing cost, improves the molten iron quality.
The utility model aims at realizing the above, a euler's metallurgical furnace gas circulation blending device, including blast furnace gas excess pressure turbine power generation device TRT, compressor, cooling tower and surge-proof valve, turbine power generation device TRT and a pressure regulating four valves are connected in parallel and are connected with the gas output pipe of euler's metallurgical furnace, TRT and the gas outlet end of pressure regulating four valves are connected with gas recovery unit and cooling tower, the outlet duct of cooling tower loops through the gas inlet cut-off and the valve set of bleeding and is connected with the compressor, the compressor is connected with euler's metallurgical furnace through the gas outlet cut-off and the valve set of bleeding; the compressor is also connected with a return pipe provided with an anti-surge valve, the return pipe is communicated with the cooling tower, the gas outlet cut-off and release valve group is also connected with a return pipe provided with a fault return control valve, and the return pipe is also communicated with the cooling tower.
Two coal gas flows of top coal gas and surplus coal gas of the Europe and metallurgy furnace are converged in a TRT and four pressure regulating valve groups through a coal gas output pipeline, after work is done and pressure is reduced, the Europe and metallurgy furnace gas needs to be cooled and pressurized to be returned to the Europe and metallurgy furnace because the temperature of the Europe and metallurgy furnace gas is 150 plus 220 ℃, and the pressure of the Europe and metallurgy furnace gas is 12 kPa. The euler furnace gas is converged into the gas recovery device after being reduced in pressure by acting in the TRT or the pressure regulating four-valve bank, the euler furnace gas is led out before the gas recovery device, the cooling tower and the compressor are arranged, and the function of the cooling tower are to ensure that the temperature of the gas entering the compressor is proper, so that the compressor can convey as much gas as possible. The pressure in the Europe and metallurgy furnace is 0.3-0.6MPa, a compressor is arranged to pressurize the Europe and metallurgy furnace with the pressure of 12kPa to 0.8 MPa, and the gas of the Europe and metallurgy furnace is returned to the Europe and metallurgy furnace through pressure difference. An anti-surge backflow pipe and an anti-surge valve are arranged for preventing the compressor from surging, and the working point of the compressor is prevented from falling in a surging area during operation by adjusting the opening degree of the anti-surge valve. The inlet and the outlet of the compressor are provided with a coal gas inlet compressor cutting and bleeding valve group and a coal gas outlet compressor cutting and bleeding valve group, and the coal gas inlet compressor cutting and bleeding valve group and the coal gas outlet compressor cutting and bleeding valve group are used for reliably withdrawing the compressor from the production system to perform qualified coal gas replacement when the compressor fails. The gas flow valve is arranged in front of the inlet of the compressor, and the PID opening of the gas flow valve is adjusted through the gas demand of the Europe and metallurgy furnace, so that the proper required gas flow of the Europe and metallurgy furnace is achieved. When the production of the Europe smelting furnace stops in a short-term damping down, the compressor does not have the opening degree of the gas passing through the fault return pipe and the fault return control valve when the machine stops, the normal operation of the compressor is maintained, and the damage to the compressor caused by the frequent starting of the compressor is avoided.
The gas enters the compressor at a higher temperature, the gas is compressed, the temperature is increased, the volume is expanded, so that the gas quantity actually conveyed by the compressor is reduced (the effective volume is reduced), and the cooling tower is arranged to reduce the volume of the gas at the inlet (improve the effective volume), so that the compressor can convey as much gas as possible under the same time condition. The anti-surge backflow device is arranged, when the compressor works in a surge area, the flow fluctuates sharply to generate the impact of airflow, so that the compressor generates strong vibration, the noise is increased, the wind pressure shakes continuously, and the larger the capacity and the pressure head of the compressor are, the larger the harmfulness of surge is. Therefore, the following conditions should be met when the compressor generates surge:
a) the operating point of the compressor falls within an unstable region having a humped Q-H performance curve;
b) when the frequency of the whole circulation is in time with the oscillation frequency of the airflow of the system, resonance is generated.
Surging occurs in the unstable region on the left side of the Q-H performance curve, and surging occurs in the upper right-hand inclined portion of the Q-H performance curve. The compressor is surging during operation, and the flow, full pressure and power of the compressor create pulsations or large amplitude pulsations with accompanying significant noise, sometimes even high decibels. The vibrations at surge are sometimes severe, damaging the compressor and piping. So that the compressor cannot be operated when surge occurs. Based on the defect that the compressor is easy to surge, the anti-surge backflow device is arranged, and the working point of the compressor falls in a stable area outside a surge area during operation by adjusting the anti-surge valve.
Another innovation is the provision of a fail-back device. When the production of the Europe smelting furnace stops in a short-term damping down, in order to prevent the compressor from being damaged by frequent starting, when the compressor does not stop, the coal gas flows circularly through the fault return pipe and the fault return control valve, and meanwhile, after the temperature of the coal gas compressed by the compressor rises, the circulating tail end of the coal gas is led to the front of the coal gas cooling device, so that the coal gas with the increased temperature after being compressed is continuously cooled, the requirement of the inlet coal gas temperature of the compressor is met, and the normal operation of the compressor is maintained.
The carbon monoxide in the gas of the Europe and metallurgy furnace is high, and the gas is sprayed into the gasification furnace to improve the reducing atmosphere in the furnace, thereby being beneficial to coke saving and smooth operation of the gasification furnace. After the euler furnace injects coal gas, the combustion of the tuyere and the reducing atmosphere in the furnace are correspondingly changed, and the operation of the euler furnace needs to be correspondingly adjusted. Because the gas of the Europe and metallurgy furnace is fast in combustion and short in fire smoke, the edge airflow of the Europe and metallurgy furnace develops, the tuyere oxidation zone is shortened, the edge load is increased in production, the edge airflow development is inhibited, and the furnace wall is protected.
The utility model discloses put into after the production of Europe smelting stove 7000Nm heavy planting of backmixing coal gas every hour, have following favorable factor through coal gas backmixing: stabilize the operation of the Ou metallurgical furnace, increase the blowing kinetic energy of the oxygen tuyere and improve the working condition of the hearth and the operation index of the Ou metallurgical furnace. And reducing the theoretical combustion temperature of the tuyere. The quality of molten iron is improved, the content of Si in the molten iron is reduced, and the silicon content in the molten iron is reduced from 1.2% to 0.6%; reduction of N2Consumption, reduction of N in coal gas by about 20Nm for ton of iron2The content, the coal gas quality is improved, and the iron-making cost is reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of the connection structure of the present invention.
Detailed Description
A gas recycling and blending device for Europe and metallurgy furnaces is shown in figure 1 and comprises a blast furnace gas excess pressure turbine generating device TRT1, a compressor 10, a cooling tower 5 and an anti-surge valve 8, wherein the turbine generating device TRT1 is connected with a pressure regulating four-valve bank 2 in parallel and is connected with a gas output pipe of the Europe and metallurgy furnaces 13, the TRT and the gas outlet end of the pressure regulating four-valve bank are connected with a gas recovery device 6 and the cooling tower 5, the gas outlet pipe of the cooling tower 5 is connected with the compressor 10 through a gas inlet cutting and diffusing valve bank 7 and a flow valve 9 in sequence, and the compressor 10 is connected with the Europe and metallurgy furnaces 13 through a gas outlet cutting and diffusing valve bank 12; the compressor 10 is also connected with a return pipe 4 provided with an anti-surge valve 8, the return pipe 4 is communicated with the cooling tower 5, the gas outlet cutting and bleeding valve group 12 is also connected with a return pipe 3 provided with a failure return control valve 11, and the return pipe 3 is also communicated with the cooling tower 5.
Claims (1)
1. The utility model provides an ou ye coal gas circulation blending device, includes blast furnace gas residual pressure turbine power generation facility TRT, compressor, cooling tower and anti-surge valve, characterized by: the turbine power generation device TRT is connected with a pressure regulating four-valve bank in parallel and is connected with a gas output pipe of the Ou-metallurgical furnace, the gas outlet ends of the TRT and the pressure regulating four-valve bank are connected with a gas recovery device and a cooling tower, the gas outlet pipe of the cooling tower is connected with the compressor sequentially through a gas inlet cutting and bleeding valve bank, and the compressor is connected with the Ou-metallurgical furnace through a gas outlet cutting and bleeding valve bank; the compressor is also connected with a return pipe provided with an anti-surge valve, the return pipe is communicated with the cooling tower, the gas outlet cut-off and release valve group is also connected with a return pipe provided with a fault return control valve, and the return pipe is also communicated with the cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921911400.2U CN211199264U (en) | 2019-11-07 | 2019-11-07 | Gas circulation and back-distribution device for Europe and metallurgy furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921911400.2U CN211199264U (en) | 2019-11-07 | 2019-11-07 | Gas circulation and back-distribution device for Europe and metallurgy furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211199264U true CN211199264U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921911400.2U Withdrawn - After Issue CN211199264U (en) | 2019-11-07 | 2019-11-07 | Gas circulation and back-distribution device for Europe and metallurgy furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211199264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110699507A (en) * | 2019-11-07 | 2020-01-17 | 新疆八一钢铁股份有限公司 | Gas circulation and back-distribution device for Europe and metallurgy furnace |
-
2019
- 2019-11-07 CN CN201921911400.2U patent/CN211199264U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110699507A (en) * | 2019-11-07 | 2020-01-17 | 新疆八一钢铁股份有限公司 | Gas circulation and back-distribution device for Europe and metallurgy furnace |
| CN110699507B (en) * | 2019-11-07 | 2024-03-19 | 新疆八一钢铁股份有限公司 | European smelting furnace gas circulation back-matching device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200807 Effective date of abandoning: 20240319 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200807 Effective date of abandoning: 20240319 |