CN220284122U - Blast furnace gas high-heating value iron mixer baking device - Google Patents
Blast furnace gas high-heating value iron mixer baking device Download PDFInfo
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- CN220284122U CN220284122U CN202320563814.0U CN202320563814U CN220284122U CN 220284122 U CN220284122 U CN 220284122U CN 202320563814 U CN202320563814 U CN 202320563814U CN 220284122 U CN220284122 U CN 220284122U
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- 238000010438 heat treatment Methods 0.000 title claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 40
- 229910052742 iron Inorganic materials 0.000 title abstract description 20
- 238000002485 combustion reaction Methods 0.000 claims abstract description 46
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 230000008676 import Effects 0.000 claims abstract description 3
- 239000010902 straw Substances 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims description 6
- 238000009628 steelmaking Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 80
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 239000002737 fuel gas Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of molten iron mixing equipment in front of a steelmaking converter, and discloses a blast furnace gas high-heat-value iron mixing furnace baking device. Comprises a combustion tube, an air tube and a gas tube; the gas pipe bottom sets up in the air pipe, the air pipe bottom sets up in the combustion tube, the gas pipe top sets up gas pipe roof, adjusting screw passes gas pipe roof and screw rod portion setting in the gas pipe, the adjusting screw bottom sets up the conical body, gas import is seted up to the gas pipe lateral wall, the air pipe top sets up the air pipe roof, the top side of air pipe is seted up from the straw, the combustion tube top sets up the combustion tube roof, combustion tube top side sets up secondary air distribution pipe, the combustion tube inner bottom sets up a plurality of steady burning stick. The baking device solves the problems that when the blast furnace gas is changed into the baking device of the iron mixer in the prior art, the baking device cannot meet the technological requirements of difficult flameout and stable temperature of molten iron and solves the potential safety hazard.
Description
Technical Field
The utility model belongs to the technical field of molten iron mixing equipment in front of a steelmaking converter, and relates to a blast furnace gas high-heat-value iron mixing furnace baking device.
Background
The steel industry is a pillar-type industry of national economy, is a resource and energy intensive industry, and is also an important point for optimizing an energy system. The iron mixing furnace is a steelmaking auxiliary equipment between the blast furnace and the converter, is mainly used for adjusting and balancing the supply and demand of molten iron between the blast furnace and the converter, ensures uninterrupted supply of molten iron required by the converter, stores and mixes molten iron components and uniform temperature in the iron mixing furnace, and is very beneficial to steelmaking of the converter. Particularly, along with readjustment of the energy structure of iron and steel enterprises, the baking of the iron and steel mixer by using blast furnace gas with low heat value becomes an ideal baking mode in order to avoid resource waste.
Often, blast furnace gas is used as fuel, and the baking temperature of the iron mixer can only be maintained at about 900 ℃; the baking temperature can be increased by adopting an oxygen-enriched mode, but the oxidation of molten iron is easy to accelerate.
The temperature compensation type heating and baking are carried out on the interior of the iron mixer by only 3-5 burners, so that the efficiency is low, the flame length is short, the baking temperature is low, and the waste of fuel gas is more caused. Meanwhile, the fuel gas which is not completely combusted is extremely easy to cause fuel gas leakage, and great potential safety hazard is brought to production.
Therefore, the development of the novel iron-mixing furnace baking device with strong combustion capacity, long flame length, high baking temperature and sufficient gas combustion has great significance for improving the steelmaking operation efficiency and reducing the gas consumption.
Disclosure of Invention
The utility model aims to overcome the defects in the background art, and provides a blast furnace gas high-heat-value mixer baking device, so as to solve the problems that the prior mixer baking device cannot meet the process requirements of difficult flameout and stable molten iron temperature and solve the potential safety hazard when the blast furnace gas is changed.
The technical scheme adopted for solving the technical problems is as follows: the blast furnace gas high-heat value iron-mixing furnace baking device comprises a combustion pipe, an air pipe and a gas pipe; the gas pipe bottom sets up in the air pipe, the air pipe bottom sets up in the combustion tube, the gas pipe top sets up gas pipe roof, adjusting screw passes gas pipe roof and screw rod portion setting in the gas pipe, the adjusting screw bottom sets up the conical body, gas import is seted up to the gas pipe lateral wall, the air pipe top sets up the air pipe roof, the top side of air pipe is seted up from the straw, the combustion tube top sets up the combustion tube roof, combustion tube top side sets up secondary air distribution pipe, the combustion tube inner bottom sets up a plurality of steady burning stick.
The baking device is also provided with a gas pipeline and an air pipeline, the gas pipeline and the air pipeline are respectively connected with the phase-change gas air heat exchanger, the gas outlet of the phase-change gas air heat exchanger is connected with the gas inlet of the baking device, the air outlet of the phase-change gas air heat exchanger is connected with the secondary air distribution pipe, and the self-priming pipe is externally connected with a single air inlet pipeline.
Further, the adjusting screw is connected to the top plate of the gas pipe through threads.
Further, the gas inlet is welded on the gas pipe.
Further, the gas pipe is fixedly connected with the air pipe top plate in a welding way; the air pipe roof is welded on the air pipe.
Further, the self-priming tube is welded with the air tube.
Further, the air pipe is fixedly connected with the combustion pipe top plate in a welding way; the burner tube top plate is welded to the burner tube.
Further, the bottom of the two sides of the combustion tube is provided with a support plate for fixing, and the support plate is welded on the outer side of the combustion tube.
Further, the outer circumference of the conical body is larger than the outer circumference of the outlet at the bottom of the gas pipe, and the conical body is connected with the adjusting screw in a welding way.
Further, a manual butterfly valve, a manual blind plate valve, a pressure sensor, a flowmeter, a regulating valve, a quick-cutting valve and an audible and visual alarm are sequentially arranged on the gas pipeline. The gas pipeline is connected with a nitrogen pipeline in a tapping way, and the nitrogen pipeline is provided with an electromagnetic valve and a flowmeter. A plurality of temperature sensors are arranged in the baking device. The baking device is also provided with an automatic igniter; the outside of the baking device is provided with a gas leakage alarm. The air pipeline is provided with a blower, a pressure transmitter, a flowmeter and an electromagnetic valve. The air inlet pipeline is provided with a pressure sensor, an electromagnetic valve and a flowmeter. And the parts are not limited to specific models, and the working functions of the parts are realized.
Further, the device is also provided with a PLC control system, and the pressure sensor, the flowmeter, the regulating valve, the quick-cut valve, the audible and visual alarm, the electromagnetic valve, the temperature sensor, the automatic igniter, the gas leakage alarm, the blower, the pressure transmitter and the induced draft fan are respectively connected with the PLC control system. And the parts are not limited to specific models, and the working functions of the parts are realized.
The phase-change gas-air heat exchanger is provided with an induced draft fan, and the phase-change gas-air heat exchanger and the induced draft fan are commercially available products, and are not limited in model.
The baking device has a structure with stable combustion capability, so that the baking device has the characteristic of strong jet flow when the load range is large and fluctuates, and the deep penetration depth of flame is kept, and the baking effect of the flame on the iron mixer is maintained.
The gas pipeline is used for guaranteeing the supply of the fuel blast furnace gas of the burner, is provided with a nitrogen pipeline, and is used for exhausting the blast furnace gas in the baking device before the baking device ignites and after flameout, so that the safety of the baking system is guaranteed.
An air duct: the air in the atmosphere is extracted by the blower, and the combustion-supporting gas air is sent into the baking device, so that the full combustion is ensured.
Compared with the prior art, the utility model has the following beneficial effects:
1. adopting a baking device special for self-priming air distribution of fuel gas, enabling the fuel gas to enter the baking device to produce siphon effect under the original effect of Bernoulli so as to suck part of air, and burning the fuel gas for the first time; the secondary combustion air is supplemented, so that the air and the coal gas are fully mixed in the combustion tube, the optimal proportion is achieved, and the length of flame is ensured to be longer.
2. By utilizing the jet induced draft principle, air is automatically distributed according to the pipeline pressure, and when the pipeline pressure changes, the air quantity brought by the jet induced draft device also changes, so that the phenomenon of fire falling does not occur.
3. A plurality of stable combustion bars are specially arranged in the baking device, so that flame stability is ensured, and blast furnace gas cannot be extinguished easily.
4. Adopts a phase-change gas-air heat exchanger, a commercial product and high-temperature flue gas of the inner and outer rows of the extraction part of the mixer furnace to be respectively preheated. Is more reliable than the second generation heat storage technology and still has the capability of preheating air to 500 ℃ and preheating coal gas to 300 ℃.
5. The reversing valve is simple in structure, free of frequent replacement, good in reliability, low in maintenance difficulty and long in service life, and the problem of blockage of the heat accumulator is avoided.
6. The final baking temperature of the low-heat-value blast furnace gas is the same as that of the existing high-heat-value gas, so that the blast furnace gas is fully utilized, the resource is maximally utilized, and benefits are created for enterprises.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of a blast furnace gas high heating value mixer baking apparatus according to the present utility model.
Fig. 2 is a schematic diagram of a blast furnace gas high heating value mixer baking device specifically using an arrangement pipeline according to the present utility model.
In the figure, the gas pipe comprises a regulating screw rod 1, a gas pipe top plate 2, a gas inlet 3, a gas pipe 4, an air pipe top plate 5, a self-sucking pipe 6, an air pipe 7, an air pipe 8, a combustion pipe top plate 9, a secondary air distribution pipe 10, 11, 12, a supporting plate, 13, a nitrogen pipeline, 14, a gas pipeline, 15, an air pipeline, 16, a blower, 17, an induced draft fan, 18, a phase-change gas-air heat exchanger and 19.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to the following examples.
Example 1
The baking device of the blast furnace gas high-heat-value iron-mixing furnace, as shown in figures 1-2, comprises a combustion pipe 10, an air pipe 7 and a combustion pipe 4; the bottom of the gas pipe 4 is arranged in the air pipe 7, the bottom of the air pipe 7 is arranged in the combustion pipe 10, the top of the gas pipe 4 is provided with a gas pipe top plate 2 and an adjusting screw 1, the adjusting screw 1 penetrates through the gas pipe top plate 2, the screw part is arranged in the gas pipe 4, the bottom of the adjusting screw 1 is provided with a conical body 11, the side wall of the gas pipe 4 is provided with a gas inlet 3, the top of the air pipe 7 is provided with an air pipe top plate 5, the top side surface of the air pipe 7 is provided with a self-sucking pipe 6, the top of the combustion pipe 10 is provided with a combustion pipe top plate 8, the side surface of the top of the combustion pipe 10 is provided with a secondary air distribution pipe 9, and the bottom of the combustion pipe 10 is provided with a plurality of stable combustion rods.
The baking device is also provided with a gas pipeline 14 and an air pipeline 15, the gas pipeline 14 and the air pipeline 15 are respectively connected with a phase-change gas-air heat exchanger 18, a gas outlet of the phase-change gas-air heat exchanger 18 is connected with a gas inlet 3 of the baking device, an air outlet of the phase-change gas-air heat exchanger 18 is connected with a secondary air distribution pipe 9, and the self-suction pipe 6 is externally connected with a single air inlet pipeline.
The adjusting screw 1 is connected to the top plate 8 of the gas pipe through threads.
The gas inlet 3 is welded to the gas pipe 4.
The gas pipe 4 is fixedly connected with the air pipe top plate 5 in a welding way; the air tube top plate 5 is welded to the air tube 7.
The self-sucking pipe 6 is welded with the air pipe 7.
The air pipe 7 is fixedly connected with the combustion pipe top plate 8 in a welding way; the burner tube top plate 8 is welded to the burner tube 10.
The bottoms of both sides of the combustion tube 10 are provided with support plates 12 for fixing, and the support plates 12 are welded to the outside of the combustion tube 10.
The outer circumference of the conical body 11 is larger than the outer circumference of the outlet at the bottom of the gas pipe 4, and the conical body 11 is welded with the adjusting screw 1.
The gas pipeline 14 is sequentially provided with a manual butterfly valve, a manual blind plate valve, a pressure sensor, a flowmeter, a regulating valve, a quick-cut valve and an audible and visual alarm. The gas pipeline 14 is connected with a nitrogen pipeline 13 in a tapping way, and the nitrogen pipeline 13 is provided with an electromagnetic valve and a flowmeter. A plurality of temperature sensors are arranged in the baking device. The baking device is also provided with an automatic igniter; the outside of the baking device is provided with a gas leakage alarm. The air duct 15 is provided with a blower 16, a pressure transmitter, a flowmeter, and a solenoid valve. The air inlet pipeline is provided with a pressure sensor, an electromagnetic valve and a flowmeter. And the parts are not limited to specific models, and the working functions of the parts are realized.
The device is also provided with a PLC control system, and a pressure sensor, a flowmeter, a regulating valve, a quick-cut valve, an audible and visual alarm, an electromagnetic valve, a temperature sensor, an automatic igniter, a gas leakage alarm, a blower, a pressure transmitter, a blower 16 and a draught fan 17 are respectively connected with the PLC control system. And the parts are not limited to specific models, and the working functions of the parts are realized.
The phase-change gas-air heat exchanger 18 is provided with the induced draft fan 17, and the phase-change gas-air heat exchanger 18 and the induced draft fan 17 are commercially available products and are not limited in model number.
The baking device introduces blast furnace gas through the gas pipe 4, the flow rate of the blast furnace gas is increased due to the sudden reduction of the cross section area when the blast furnace gas passes through the conical body 11, a siphoning phenomenon is generated under the action of Bernoulli principle, air is sucked from the self-suction pipe 6 for primary combustion, the fan sends combustion-supporting gas into the burner through the secondary air distribution pipe 9, the gas and the combustion-supporting gas are mixed and begin to burn in the burner after passing through the conical body 11, and the combustion-supporting gas and the blast furnace gas are preheated by the flue gas waste heat generated during baking by the combination of the draught fan 17, so that the combustion efficiency and the energy utilization rate are effectively improved, and the baking temperature is improved; and because of adopting the internal combustion form and twice combustion, the flame is sprayed out of the burner under the actions of blast furnace gas pressure, acceleration of the conical body 11 and thermal expansibility of the gas, the combustion impact force is strong, and the flame temperature is high.
While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (7)
1. The baking device of the blast furnace gas high-heat-value iron-mixing furnace is characterized by comprising a combustion pipe (10), an air pipe (7) and a gas pipe (4); gas pipe (4) bottom sets up in air pipe (7), air pipe (7) bottom sets up in combustion tube (10), gas pipe (4) top sets up gas pipe roof (2), adjusting screw (1) pass gas pipe roof (2) and screw rod portion set up in gas pipe (4), adjusting screw (1) bottom sets up conical body (11), gas import (3) are seted up to gas pipe (4) lateral wall, air pipe (7) top sets up air pipe roof (5), from straw (6) are seted up to the top side of air pipe (7), combustion tube (10) top sets up combustion tube roof (8), combustion tube (10) top side sets up secondary air distribution pipe (9), bottom sets up a plurality of steady burning stick in combustion tube (10).
2. A blast furnace gas high heating value mixer roasting apparatus as claimed in claim 1, characterized in that the adjusting screw (1) is screwed to the burner top plate (8).
3. A blast furnace gas high heating value mixer furnace roasting apparatus as claimed in claim 2, characterized in that the gas inlet (3) is welded to the gas pipe (4).
4. A blast furnace gas high heat value mixer roasting device according to claim 3, characterized in that the gas pipe (4) is welded and fixed with the air pipe top plate (5); the air pipe top plate (5) is welded on the air pipe (7).
5. The blast furnace gas high heating value mixer roasting apparatus as claimed in claim 4, wherein the self-suction pipe (6) is welded with the air pipe (7).
6. The blast furnace gas high-heating-value iron-mixing furnace baking device according to claim 5, wherein the air pipe (7) is fixedly connected with the top plate (8) of the combustion pipe in a welding way; the burner tube top plate (8) is welded to the burner tube (10).
7. The blast furnace gas high heating value mixer roasting apparatus as set forth in claim 6, wherein the outer circumference of the cone (11) is larger than the outer circumference of the bottom outlet of the gas pipe (4), and the cone (11) is welded with the adjusting screw (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320563814.0U CN220284122U (en) | 2023-03-22 | 2023-03-22 | Blast furnace gas high-heating value iron mixer baking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320563814.0U CN220284122U (en) | 2023-03-22 | 2023-03-22 | Blast furnace gas high-heating value iron mixer baking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220284122U true CN220284122U (en) | 2024-01-02 |
Family
ID=89343701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320563814.0U Active CN220284122U (en) | 2023-03-22 | 2023-03-22 | Blast furnace gas high-heating value iron mixer baking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220284122U (en) |
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2023
- 2023-03-22 CN CN202320563814.0U patent/CN220284122U/en active Active
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