CN213977757U - Novel top combustion type hot blast stove for blast furnace - Google Patents
Novel top combustion type hot blast stove for blast furnace Download PDFInfo
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- CN213977757U CN213977757U CN202023101806.XU CN202023101806U CN213977757U CN 213977757 U CN213977757 U CN 213977757U CN 202023101806 U CN202023101806 U CN 202023101806U CN 213977757 U CN213977757 U CN 213977757U
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 73
- 238000005192 partition Methods 0.000 claims abstract description 10
- 239000011449 brick Substances 0.000 claims abstract description 9
- 239000003034 coal gas Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005338 heat storage Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The utility model relates to a novel top combustion type hot blast stove used by a blast furnace, which can effectively solve the problems of instability and damage of a hot blast pipe system, deformation and bulging of a partition wall, brick falling, combustion vibration, short circuit fire at the eye corner of the lower part of the partition wall, burning of a furnace operator, the arrangement of a burner between a furnace top and a furnace body, the formation of a combustion chamber by the space between the top of the furnace body and the furnace top, the arrangement of a fire well chamber and a heat accumulation chamber by the partition wall in the furnace body, wherein the burner is characterized in that a gas channel and a combustion-supporting air channel are separated from each other from top to bottom and are arranged in the wall of the burner, the inlet end of the combustion-supporting air channel is communicated with a combustion-supporting air inlet pipe, the outlet end of the combustion-supporting air channel is communicated with the combustion chamber by a vertically upward air nozzle pipe, the inlet end of the gas channel is communicated with the gas inlet pipe, and the outlet end of the gas channel is communicated with the combustion chamber by a vertically upward gas nozzle pipe; the utility model discloses rational in infrastructure, improve the burning condition, the air current is even, spray tube pressure is even, improves combustion strength, excellent in use effect, longe-lived, energy-concerving and environment-protective.
Description
Technical Field
The utility model relates to a hot blast stove, in particular to a novel top combustion type hot blast stove which is transformed from an internal combustion type hot blast stove and is used for a blast furnace.
Background
The hot blast stove is an important corollary equipment in the modern blast furnace ironmaking process, and along with the development of science and technology, the hot blast stove serving as an important equipment of the blast furnace ironmaking technology also goes through a novel and large-scale development way, the progress of the related technology of the hot blast stove is powerfully promoted, and the structure of the currently used hot blast stove is not limited to an internal combustion type and a top combustion type. With the internal-combustion type hot-blast furnace that the combustion chamber fire shaft is on a parallel with the regenerator, use in large-scale hot-blast furnace in a large number, but because the combustion oscillation that the combustion chamber flow field structure of the internal-combustion type hot-blast furnace that the combustion chamber fire shaft is on a parallel with the regenerator has the unstability of combustion chamber flow field structure and leads to and the uneven scheduling problem of bulb flow distribution, hot-blast line unstability damage easily appears, the partition wall warp the swell, fall the brick, the combustion vibration, partition wall lower part canthus short circuit scurries fire, defects such as stove operator burns out, direct influence normal work. Therefore, how to improve the structure of the hot blast stove to obtain reasonable stove structure, stable and uniform airflow and good heat transfer and combustion effects should be the necessary way for the innovation and innovation of the hot blast stove technology.
Disclosure of Invention
To the above situation, in order to overcome the defects of the prior art, the utility model aims to provide a novel top combustion type hot blast stove used by a blast furnace, which can effectively solve the problems of instability and damage of a hot blast pipe system, deformation and bulging of a partition wall, brick falling, combustion vibration, short circuit fire at the eye corner of the lower part of the partition wall and burning out of a furnace operator.
The technical proposal of the utility model is that the novel top combustion type hot blast stove used by the blast furnace comprises a furnace top, a furnace body and a burner, wherein the burner is arranged between the furnace top and the furnace body, the space between the top of the furnace body and the furnace top forms a combustion chamber, a fire well chamber and a heat storage chamber are arranged in the furnace body through a partition wall, the burner is composed of a burner wall, a combustion-supporting air inlet pipe, a coal gas channel and a combustion-supporting air channel, wherein the coal gas channel and the combustion-supporting air channel are vertically and alternately arranged in the burner wall, the inlet end of the combustion-supporting air channel is communicated with the combustion-supporting air inlet pipe, the outlet end of the combustion-supporting air channel is communicated with the inside of the combustion chamber through an air nozzle pipe which vertically faces upwards, the inlet end of the coal gas channel is communicated with the coal gas inlet pipe, and the outlet end of the coal gas channel is communicated with the inside of the combustion chamber through the coal gas nozzle pipe which vertically faces upwards; the hot well chamber in be equipped with hot-blast standpipe, hot-blast standpipe lower extreme is arranged in on the hot well chamber collet, hot-blast export on the hot-blast standpipe lower part side is linked together with the hot-blast outlet pipe that stretches out outside the furnace body, is filled with the checker brick that upper portion is higher than combustor top as the heat accumulator in the heat accumulator, has the exhanst gas outlet on the furnace body of heat accumulator lower part.
The utility model discloses novel structure is unique, is the improvement of going on the basis of the internal combustion formula hot-blast furnace, that is to say, the utility model discloses a top combustion formula hot-blast furnace by internal combustion type transformation, structurally more reasonable improves the burning condition, and the air current is even, spray tube pressure is even, improves combustion strength, excellent in use effect, longe-lived, and energy-concerving and environment-protective effectively improves the utilization efficiency of heat accumulator more, is the innovation on the top combustion formula hot-blast furnace, has huge economy and social.
Drawings
Fig. 1 is a front view of the structure section of the present invention.
Fig. 2 is a transverse section view of the furnace body fire well chamber of the utility model.
Fig. 3 is a front view of a cross section of an internal combustion type hot blast stove before modification.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in the figure 1-2, the utility model relates to a novel top combustion type hot blast stove used by a blast furnace, which comprises a furnace top, a furnace body and a burner, wherein the burner is arranged between the furnace top 3 and the furnace body 1, the space between the top of the furnace body 1 and the furnace top 3 forms a combustion chamber 12, the furnace body is separated into a fire well chamber 10 and a regenerator 9 by a partition wall, the burner is composed of a burner wall 2, a combustion air inlet pipe 2-4, a gas inlet pipe 2-5, a gas channel 2-8 and a combustion air channel 2-1, the gas channel 2-8 and the combustion air channel 2-1 are separated from each other from top to bottom and are arranged in the burner wall 2, the inlet end of the combustion air channel 2-1 is communicated with the combustion air inlet pipe 2-4, the outlet end of the combustion air channel 2-1 is communicated with the combustion chamber 12 through an air nozzle pipe 2-7 which is vertically upward, the inlet end of the gas channel 2-8 is communicated with a gas inlet pipe 2-5, and the outlet end of the gas channel 2-8 is communicated with the interior of the combustion chamber 12 through a gas nozzle pipe 2-3 which is vertically upward; the hot well chamber 10 is internally provided with a hot air vertical pipe 14, the lower end part of the hot air vertical pipe 14 is arranged on a hot well chamber bottom support 6, a hot air outlet on the side surface of the lower part of the hot air vertical pipe 14 is communicated with a hot air outlet pipe 8 extending out of the furnace body, a checker brick 15 with the upper part higher than the top of the burner and used as a heat accumulator is filled in the heat accumulator 9, and a flue gas outlet 1-1 is arranged on the furnace body at the lower part of the heat accumulator.
In order to ensure the use effect and convenient use, the furnace body 1, the burner wall body 2 and the furnace top 3 are externally wrapped with a steel shell 13 which is welded into a whole;
a first manhole 4 is arranged in the middle of the top of the furnace top 3, a second manhole 2-6 is arranged on one side of the upper part of the burner wall 2, and a third manhole 7 is arranged on one side of the furnace body 1 corresponding to the second manhole 2-6;
heat-resisting bricks 5 are filled between the lower part of the fire well chamber bottom support 6 and the inner surface of the bottom of the furnace body 1;
the hot air vertical pipe 14 is a hollow pipe with an oval cross section (or called eye shape), and the hot air outlet pipe 8 is communicated with one side of the lower part of the hollow pipe with a small diameter;
the upper end and the lower end of the burner wall body 2 are respectively connected with the furnace top 3 and the furnace body 1 through a labyrinth sliding structure (known technology);
the combustor is a ceramic combustor.
The structure shows that the internal combustion type hot blast stove before modification consists of a regenerative chamber and a combustion chamber (shown in figure 3), a fire well wall is arranged between the regenerative chamber and the combustion chamber for separation, and a rectangular ceramic burner is arranged at the lower part of the combustion chamber, the utility model discloses a modification is carried out on the internal combustion type hot blast stove of which the existing combustion chamber fire well is parallel to the regenerative chamber, firstly, the stove shell is welded at the upper part of the stove body and the lower part of the vault, after the welding is finished, the original stove shell of the section is cut off, and then the construction of the refractory material lining is carried out; the newly constructed refractory material lining is composed of a furnace body, the upper part of a hot air vertical pipe, a vault and a ceramic burner, the fire well of the original internal combustion type hot blast stove is transformed to be used as the hot air vertical pipe, and the refractory material lining is thickened; the ceramic burner is arranged on the upper part of the furnace body below the vault, the ceramic burner is provided with a burner wall body, a gas channel and a combustion air channel, the gas channel and the combustion air channel are arranged in the wall body of the burner, the outer wall body is provided with a gas inlet communicated with the gas channel, the upper part of the gas channel is the combustion air channel, the outer side of the wall body is provided with the combustion air inlet communicated with the gas channel, the hot air vertical pipe is arranged in the furnace body in an eye shape, the hot air outlet is positioned in the middle of the hot air vertical pipe, and the right side of the hot air vertical pipe is provided with a regenerator.
When the newly welded steel shell has part of obstacles on the frame section and can not complete the welding of the whole circular channel, the obstacles can be skipped, and the length of the internal gas channel and the combustion-supporting air channel after being modified can be up to 80 percent of that of the whole circular channel and can be normally used.
The utility model discloses an invert the linear vault combustion chamber of catenary and set up the combustor that spouts on the crisscross annular arrangement of coal gas and the air nozzle of its bottom, enable crisscross coal gas and the air current that spout and mix burning in advance well, the flue gas turns back through the vault and forms a flue gas backward flow vortex of pressing from both sides in the middle of two reverse air currents afterwards, and it has realized catching fire in advance and flame stabilization of air current to going up mixed air current's preheating function. The self-excitation stability ensures the flow pattern stability and combustion intensity of the whole airflow flow field. Meanwhile, the characteristic that the static pressure of the backflow vortex is low relative to the main airflow has a traction effect on downward airflow, so that the main airflow naturally tends to flow dispersedly, and finally uniform airflow distribution entering the checker bricks is formed, the airflow field structure of the combustion chamber can effectively and reasonably solve a series of problems of airflow mixing, airflow preheating, ignition combustion, airflow stability, airflow distribution uniformity and the like in the combustion process of gas fuel, the combustion condition is improved, the combustion strength is improved, the air temperature and the product quality are ensured, fuel and investment are saved, the cost can be saved by more than 30 percent through field tests and calculation, the service life is prolonged by more than 2 times, the energy is saved by more than 40 percent compared with the original equipment, the temperature and the discharge of waste gas are greatly reduced, the pollution to the environment is reduced, and the economic and social benefits are huge.
Claims (7)
1. A novel top combustion type hot blast stove used for a blast furnace comprises a furnace top, a furnace body and a burner, and is characterized in that the burner is arranged between the furnace top (3) and the furnace body (1), a combustion chamber (12) is formed by the space between the top of the furnace body (1) and the furnace top (3), a fire well chamber (10) and a heat storage chamber (9) are separated in the furnace body through a partition wall, the burner is composed of a burner wall body (2), a combustion air inlet pipe (2-4), a coal gas inlet pipe (2-5), a coal gas channel (2-8) and a combustion air channel (2-1), the coal gas channel (2-8) and the combustion air channel (2-1) are separated from each other up and down and are arranged in the burner wall body (2), the inlet end of the combustion air channel (2-1) is communicated with the combustion air inlet pipe (2-4), the outlet end of the combustion-supporting air channel (2-1) is communicated with the interior of the combustion chamber (12) through a vertical upward air nozzle pipe (2-7), the inlet end of the gas channel (2-8) is communicated with a gas inlet pipe (2-5), and the outlet end of the gas channel (2-8) is communicated with the interior of the combustion chamber (12) through a vertical upward gas nozzle pipe (2-3); the hot well chamber (10) in be equipped with hot-blast standpipe (14), hot-blast standpipe (14) lower tip is arranged in on hot well chamber collet (6), hot-blast export on the side of hot-blast standpipe (14) lower part is linked together with hot-blast outlet pipe (8) that stretches out outside the furnace body, be filled with in regenerator (9) upper portion and be higher than checker brick (15) as the heat accumulator in combustor top, have exhanst gas outlet (1-1) on the furnace body of heat accumulator lower part.
2. The novel top-burning hot-blast stove for the blast furnace of claim 1, characterized in that the exterior of the stove body (1), the burner wall (2) and the stove top (3) is wrapped with a steel outer shell (13) welded as a whole.
3. The novel top combustion hot blast stove for the blast furnace of claim 1, characterized in that a first manhole (4) is arranged in the middle of the top of the furnace top (3), a second manhole (2-6) is arranged on one side of the upper part of the burner wall (2), and a third manhole (7) is arranged on one side of the furnace body (1) corresponding to the second manhole (2-6).
4. The novel top-fired hot blast stove for a blast furnace as claimed in claim 1, wherein heat-resistant bricks (5) are filled between the lower part of the bottom support (6) of the firebox and the inner surface of the bottom of the furnace body (1).
5. The novel top combustion stove for a blast furnace as claimed in claim 1, wherein the hot air standpipe (14) is a hollow tube with an oval cross-section, and the hot air outlet pipe (8) is connected to the side of the hollow tube with the smaller diameter.
6. The top combustion hot blast stove for the blast furnace according to claim 1, wherein the upper and lower ends of the burner wall (2) are connected with the stove top (3) and the stove body (1) respectively through a labyrinth sliding structure.
7. The new top-fired hot blast stove for a blast furnace as claimed in claim 1 wherein the burner is a ceramic burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023101806.XU CN213977757U (en) | 2020-12-22 | 2020-12-22 | Novel top combustion type hot blast stove for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023101806.XU CN213977757U (en) | 2020-12-22 | 2020-12-22 | Novel top combustion type hot blast stove for blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213977757U true CN213977757U (en) | 2021-08-17 |
Family
ID=77247351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023101806.XU Active CN213977757U (en) | 2020-12-22 | 2020-12-22 | Novel top combustion type hot blast stove for blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213977757U (en) |
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2020
- 2020-12-22 CN CN202023101806.XU patent/CN213977757U/en active Active
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