CN219991641U - Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device - Google Patents
Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device Download PDFInfo
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- CN219991641U CN219991641U CN202321635870.7U CN202321635870U CN219991641U CN 219991641 U CN219991641 U CN 219991641U CN 202321635870 U CN202321635870 U CN 202321635870U CN 219991641 U CN219991641 U CN 219991641U
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- ejector
- pressure device
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- 239000003245 coal Substances 0.000 title claims abstract description 123
- 239000000843 powder Substances 0.000 title claims abstract description 83
- 238000002347 injection Methods 0.000 title claims abstract description 35
- 239000007924 injection Substances 0.000 title claims abstract description 35
- 238000010298 pulverizing process Methods 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 46
- 239000004744 fabric Substances 0.000 claims abstract description 38
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- 239000002817 coal dust Substances 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Abstract
The utility model relates to a blast furnace coal injection pulverizing system with a pulverized coal bin negative pressure device, which comprises a mill, a cloth bag pulverized coal collector, a pulverized coal bin, a main exhaust fan and a control part, wherein the pulverized coal bin is communicated with a moisture absorption pipe, an outlet of the moisture absorption pipe is communicated with an inlet of the cloth bag pulverized coal collector through a first branch or a second branch, the second branch is provided with the negative pressure device, the negative pressure device comprises an ejector, the ejector is communicated with an ejector air tank, an ejector nozzle is arranged in the ejector, and an ejector air flow supplied by the ejector air tank is ejected from the ejector nozzle to form a negative pressure zone; the grinder, the cloth bag powder collector, the pulverized coal bin, the main exhaust fan, the first branch, the second branch and the negative pressure device are all electrically connected with the control part. The utility model solves the problem that when the powder making system is overhauled and stops working, the coal dust bin cannot maintain negative pressure, so that the water vapor, CO and other combustible gases in the coal dust bin cannot be discharged in time; the pulverized coal bin is always in a negative pressure state, so that external mechanical energy or electric energy is not required to be consumed, the energy consumption is saved, and the equipment floor occupation problem is solved.
Description
Technical Field
The utility model relates to the technical field of blast furnace pulverizing systems, in particular to a blast furnace coal injection pulverizing system with a coal powder bin negative pressure device.
Background
At present, a primary cloth bag powder collecting process is adopted in a blast furnace powder making system, namely, coal powder milled by a coal mill is dried by dry gas, enters a cloth bag powder collector along with air flow, is collected in an ash bucket, and enters a coal powder bin for storage through a coal powder sieve. And the gas filtered by the cloth bag powder collector is discharged into the atmosphere through the main exhaust fan. When the coal injection pulverizing system works normally, negative pressure is required to be maintained in the pulverized coal bin, and on one hand, water vapor and combustible gas decomposed by heating the pulverized coal in the bin are discharged; on the other hand, the pulverized coal overflow can be prevented, the environment is protected, and the explosion-proof requirement is met.
In the prior art, a moisture absorption pipe is communicated with a cloth bag powder collector, a main exhaust fan or a special fan is utilized to generate negative pressure, the top of a coal powder bin is connected to the inlet of the cloth bag powder collector through a pipeline (moisture absorption pipe), when the powder making system works, gas in the coal powder bin is discharged through the pipeline (moisture absorption pipe), and the coal powder bin can be kept in a micro negative pressure state. In the technology, when the main exhaust fan does not work, the inside of the cloth bag powder collector is in a normal pressure state, the gas cannot be completely exhausted only by the chimney effect of the moisture absorption pipe, the inside of the cloth bag is in a positive pressure state, and the content of combustible gas such as CO generated by coal dust is possibly out of standard, so that the safety of the system is not facilitated. Therefore, when the scheme of the moisture absorption pipe is adopted, the main exhaust fan is designed to be a variable frequency fan, when the powder making system is stopped or equipment such as a mill is overhauled, the working frequency of the main exhaust fan is reduced, the air quantity is reduced, the whole powder making system is kept in a negative pressure state continuously, but the power consumption is high, and the overhauling time of the main exhaust fan is not considered. And the investment is increased by specially arranging the small-displacement diffusing fan.
Or a bag-type dust collector with a small fan is arranged at the top of the pulverized coal bin to generate negative pressure. The gas in the bin enters a cloth bag at the top of the bin, and is discharged to the atmosphere along with a fan after dust removal. The large space is reserved for arranging the cloth bags at the top of the bin, so that the whole height of a workshop and equipment arrangement are affected. The adoption of the cloth bag at the top of the bin and the small fan can increase investment, equipment operation energy consumption and subsequent overhaul and maintenance cost.
Both measures have limitations, when the moisture absorption pipe is adopted and the powder preparation system does not work, the coal powder bin cannot generate negative pressure environment, the dust remover at the top of the bin is too complex, the investment is increased, and a new technology is needed to solve the problems.
Therefore, the inventor provides a blast furnace coal injection and pulverizing system with a coal powder bin negative pressure device by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The utility model aims to provide a blast furnace coal injection and pulverizing system with a pulverized coal bin negative pressure device, which solves the problem that when the pulverized coal making system is overhauled and stops working, the pulverized coal bin cannot maintain negative pressure, so that the water vapor, CO and other combustible gases in the bin cannot be discharged in time; the pulverized coal bin is always in a negative pressure state, the ejector is of a core structure of the negative pressure device, and no transmission part is needed; the external mechanical energy or electric energy is not required to be consumed, the energy consumption is saved, and the equipment floor space problem is solved.
The utility model aims to realize that a blast furnace coal injection pulverizing system with a pulverized coal bin negative pressure device comprises a mill, a cloth bag pulverized coal collector, a pulverized coal bin, a main exhaust fan and a control part, wherein the top of the pulverized coal bin is communicated with a moisture absorption pipe, an outlet of the moisture absorption pipe is communicated with an inlet of the cloth bag pulverized coal collector through a first branch or a second branch which are arranged in parallel, a negative pressure device is arranged on the second branch, the negative pressure device comprises an ejector, an ejector gas tank is communicated with the ejector, an ejector nozzle is arranged in the ejector, and an ejector gas flow supplied by the ejector gas tank is ejected from the ejector nozzle to form a negative pressure region; the mill, the cloth bag powder collector, the coal dust bin, the main exhaust fan, the first branch, the second branch and the negative pressure device are all electrically connected with the control part.
In a preferred embodiment of the utility model, the ejector is communicated with the ejection gas tank through an ejection gas pipeline, a flow regulating valve, a flowmeter and a fifth cut-off valve are arranged on the ejection gas pipeline, and the flow regulating valve, the flowmeter and the fifth cut-off valve are all electrically connected with the control part.
In a preferred embodiment of the utility model, the top of the pulverized coal bin is communicated with a pressure transmitter; a first cut-off valve and a second cut-off valve are arranged on the first branch, and a third cut-off valve and a fourth cut-off valve are respectively arranged at two ends of the second branch, which are positioned at the ejector; the pressure transmitter, the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are all electrically connected with the control portion.
In a preferred embodiment of the present utility model, the moisture absorption tube is provided with a wear-resistant metal hose.
In a preferred embodiment of the utility model, the inner cavity of the ejector is lined with a wear resistant ceramic layer.
In a preferred embodiment of the utility model, the injection nozzle is made of a wear resistant metal or ceramic material.
In a preferred embodiment of the present utility model, the ejector gas tank is a nitrogen gas tank.
In a preferred embodiment of the utility model, the grinder is communicated with the bag powder collector through a bag powder collector inlet pipeline, and the outlets of the first branch and the second branch are communicated with the bag powder collector inlet pipeline.
In a preferred embodiment of the utility model, a coal powder sieve is arranged between the cloth bag powder collector and the coal powder bin.
In a preferred embodiment of the utility model, the cloth bag powder collector is communicated with the main exhaust fan through a cloth bag outlet pipeline, and the outlet of the main exhaust fan is communicated with a diffusing pipeline.
As described above, the blast furnace coal injection and pulverizing system with the pulverized coal bin negative pressure device of the utility model has the following structure
The beneficial effects are that:
when the blast furnace coal injection and pulverizing system with the coal powder bin negative pressure device works normally, the main exhaust fan is used for pumping and exhausting the gas in the coal powder bin, and the coal powder bin can maintain a negative pressure state of about-1 KPa; when the powder making system overhauls and stops working, the negative pressure device starts working, so that the coal powder bin is in a negative pressure state; the pulverized coal bin of the utility model is always in a negative pressure state, thereby reducing O 2 And the content of combustible gases such as CO and the like, so that the safety of the system is improved; the water vapor in the bin can be effectively discharged, so that the water content of the pulverized coal is reduced, the fluidity of the pulverized coal is improved, and the phenomenon that a powder conveying pipeline or a spray gun is blocked due to high water content to influence the production of a blast furnace is avoided;
the ejector is of a core structure of the negative pressure device, is simple in structure and durable, can work only by means of parameters such as pressure and temperature of fluid, and does not need any transmission part; the external mechanical energy or electric energy is not required to be consumed, so that the energy consumption is saved, and the engineering investment is reduced;
the utility model effectively solves the problem that when the powder making system is overhauled and stops working, the negative pressure of the coal powder bin cannot be maintained, so that the water vapor, CO and other combustible gases in the coal powder bin cannot be discharged in time; the whole device is simpler, does not need to be added with a cloth bag or a fan, saves funds and solves the problem of occupied area of equipment.
Drawings
The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model. Wherein:
fig. 1: the utility model relates to a schematic diagram of a blast furnace coal injection pulverizing system with a pulverized coal bin negative pressure device.
In the figure:
1. a grinding machine; 2. an inlet pipeline of the cloth bag powder collector; 3. a fourth shut-off valve; 4. an ejector; 5. a flow regulating valve; 6. a flow meter; 7. a fifth shut-off valve; 8. an injection gas line; 9. injecting a gas tank; 10. a second shut-off valve; 11. a first branch; 12. a first shut-off valve; 13. a second branch; 14. a third shut-off valve; 15. a moisture absorption tube; 16. wear-resistant metal hose; 17. a coal dust bin; 18. a cloth bag powder collector; 19. a pressure transmitter; 20. a coal powder sieve; 21. a cloth bag outlet pipe; 22. a bleeding pipe; 23. and a main exhaust fan.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings.
The specific embodiments of the utility model described herein are for purposes of illustration only and are not to be construed as limiting the utility model in any way. Given the teachings of the present utility model, one of ordinary skill in the related art will contemplate any possible modification based on the present utility model, and such should be considered to be within the scope of the present utility model. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the utility model provides a blast furnace coal injection pulverizing system with a pulverized coal bin negative pressure device, which comprises a mill 1, a cloth bag pulverized coal collector 18, a pulverized coal bin 17, a main exhaust fan 23 and a control part, wherein the top of the pulverized coal bin 17 is communicated with a moisture absorption pipe 15, the outlet of the moisture absorption pipe 15 is communicated with the inlet of the cloth bag pulverized coal collector through a first branch 11 or a second branch 13 which are arranged in parallel, the second branch 13 is provided with the negative pressure device, the negative pressure device comprises an ejector 4, the ejector 4 is communicated with an ejector gas tank 9, an ejector nozzle is arranged in the ejector 4, and the ejector gas flow supplied by the ejector gas tank 9 is ejected from the ejector nozzle to form a negative pressure zone; the grinder 1, the cloth bag powder collector 18, the pulverized coal bin 17, the main exhaust fan 23, the first branch 11, the second branch 13 and the negative pressure device are all electrically connected with the control part.
When the blast furnace coal injection and pulverizing system with the coal powder bin negative pressure device works normally, the main exhaust fan 23 pumps the gas in the coal powder bin 17 and discharges the gas, and the coal powder bin 17 can maintain a negative pressure state of about-1 KPa; when the powder making system overhauls and stops working, the negative pressure device starts working, so that the coal powder bin is in a negative pressure state; the pulverized coal bin of the utility model is always in a negative pressure state, thereby reducing O 2 And the content of combustible gases such as CO and the like, so that the safety of the system is improved; and can effectively discharge water vapor in the bin, thereby reducing the water content of the pulverized coal, improving the fluidity of the pulverized coal, and avoiding blocking a powder conveying pipeline or a spray gun due to high water content so as to further influence the production of the blast furnace.
The ejector is of a core structure of the negative pressure device, is simple in structure and durable, can work only by means of parameters such as pressure and temperature of fluid, and does not need any transmission part; no external mechanical energy or electric energy is consumed, so that the energy consumption is saved, and the engineering investment is reduced.
The utility model effectively solves the problem that when the powder making system is overhauled and stops working, the negative pressure of the coal powder bin cannot be maintained, so that the water vapor, CO and other combustible gases in the coal powder bin cannot be discharged in time; the whole device is simpler, does not need to be added with a cloth bag or a fan, saves funds and solves the problem of occupied area of equipment.
Further, as shown in fig. 1, the ejector 4 is communicated with an ejection gas tank 9 through an ejection gas pipeline 8, the ejection gas pipeline 8 is provided with a flow regulating valve 5, a flow meter 6 and a fifth cut-off valve 7, and the flow regulating valve 5, the flow meter 6 and the fifth cut-off valve 7 are all electrically connected with a control part. The flowmeter 6 and the flow regulating valve 5 are matched to complete flow control, the injection capacity of the injector is regulated, and the pressure of the pulverized coal bin is ensured to be maintained at a set value.
Further, as shown in fig. 1, a pressure transmitter 19 is arranged at the top of the pulverized coal bin 17 in a communicating manner; a first shut-off valve 12 and a second shut-off valve 10 are arranged on the first branch 11, and a third shut-off valve 14 and a fourth shut-off valve 3 are respectively arranged on the second branch 13 at two ends of the ejector 4; the pressure transmitter 19, the first shut-off valve 12, the second shut-off valve 10, the third shut-off valve 14 and the fourth shut-off valve 3 are all electrically connected to the control unit.
The negative pressure device considers the abrasion of the pulverized coal to the device, and only uses the ejector 4 when the powder preparation system does not work, so that the service life of the ejector is greatly prolonged. The parts contacted with the pulverized coal are wear-resistant parts, the outside is coated with rock wool to reduce noise, the inner cavity of the ejector is lined with a wear-resistant ceramic layer, and the ejector nozzle is made of wear-resistant metal or ceramic materials.
Further, as shown in fig. 1, a wear-resistant metal hose 16 is provided on the moisture absorption tube 15.
In the present embodiment, the ejector tank 9 is a nitrogen tank.
Further, as shown in fig. 1, the mill 1 is communicated with the bag powder collector 18 through the inlet pipeline 2 of the bag powder collector, and the outlets of the first branch 11 and the second branch 13 are communicated with the inlet pipeline 2 of the bag powder collector.
Further, as shown in fig. 1, a pulverized coal screen 20 is provided between the bag collector 18 and the pulverized coal bin 17.
Further, as shown in fig. 1, the bag powder collector 18 is communicated with a main exhaust fan 23 through a bag outlet pipeline 21, and the outlet of the main exhaust fan 23 is communicated with a diffusing pipeline 22.
When the blast furnace coal injection and pulverizing system provided with the coal powder bin negative pressure device of the utility model works normally,
the ejector 4 is not required to operate, the fourth cut-off valve 3 and the third cut-off valve 14 are kept closed (the first branch 11 is closed), the second cut-off valve 10 and the first cut-off valve 12 are kept open (the second branch 13 is opened), and because the inlet of the cloth bag powder collector 18 is in a negative pressure state (about-10 KPa), the gas in the coal dust bin 17 enters the cloth bag powder collector 18 through the first branch 11, is pumped away by the main exhaust fan 23 and is discharged through the discharging pipeline 22, and the coal dust bin 17 can maintain a negative pressure state of about-1 KPa.
When the main exhaust fan 23 stops working, once the pressure transmitter 19 at the top of the pulverized coal bin detects that the pressure in the bin exceeds a preset value, the fourth shut-off valve 3, the fifth shut-off valve 7 and the third shut-off valve 14 are automatically opened by interlocking control of a control part (an automatic program), and the second shut-off valve 10 and the first shut-off valve 12 are closed. The high-speed nitrogen flow is sprayed out from an injection nozzle in the injector 4 to form a negative pressure area, the gas in the pulverized coal bin 17 is extracted, the two gases are mixed to realize kinetic energy exchange, a medium-pressure mixed gas flow is formed, the medium-pressure mixed gas flow enters the cloth bag powder collector 18, and then is discharged to the atmosphere along a cloth bag outlet pipeline 21, a main exhaust fan 23 and a diffusing pipeline 22.
As described above, the blast furnace coal injection and pulverizing system with the pulverized coal bin negative pressure device of the utility model has the following structure
The beneficial effects are that:
when the blast furnace coal injection and pulverizing system with the coal powder bin negative pressure device works normally, the main exhaust fan is used for pumping and exhausting the gas in the coal powder bin, and the coal powder bin can maintain a negative pressure state of about-1 KPa; when the powder making system overhauls and stops working, the negative pressure device starts working, so that the coal powder bin is in a negative pressure state; the pulverized coal bin of the utility model is always in a negative pressure state, thereby reducing O 2 And the content of combustible gases such as CO and the like, so that the safety of the system is improved; the water vapor in the bin can be effectively discharged, so that the water content of the pulverized coal is reduced, the fluidity of the pulverized coal is improved, and the phenomenon that a powder conveying pipeline or a spray gun is blocked due to high water content to influence the production of a blast furnace is avoided;
the ejector is of a core structure of the negative pressure device, is simple in structure and durable, can work only by means of parameters such as pressure and temperature of fluid, and does not need any transmission part; the external mechanical energy or electric energy is not required to be consumed, so that the energy consumption is saved, and the engineering investment is reduced;
the utility model effectively solves the problem that when the powder making system is overhauled and stops working, the negative pressure of the coal powder bin cannot be maintained, so that the water vapor, CO and other combustible gases in the coal powder bin cannot be discharged in time; the whole device is simpler, does not need to be added with a cloth bag or a fan, saves funds and solves the problem of occupied area of equipment.
The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this utility model, and are intended to be within the scope of this utility model.
Claims (10)
1. The blast furnace coal injection pulverizing system with the pulverized coal bin negative pressure device comprises a mill, a cloth bag pulverized coal collector, a pulverized coal bin, a main exhaust fan and a control part, and is characterized in that the top of the pulverized coal bin is communicated with a moisture absorption pipe, an outlet of the moisture absorption pipe is communicated with an inlet of the cloth bag pulverized coal collector through a first branch or a second branch which are arranged in parallel, a negative pressure device is arranged on the second branch, the negative pressure device comprises an ejector, the ejector is communicated with an ejector gas tank, an ejector nozzle is arranged in the ejector, and an ejector gas flow supplied by the ejector gas tank is ejected from the ejector nozzle to form a negative pressure zone; the mill, the cloth bag powder collector, the coal dust bin, the main exhaust fan, the first branch, the second branch and the negative pressure device are all electrically connected with the control part.
2. The blast furnace coal injection pulverizing system with the pulverized coal bin negative pressure device according to claim 1, wherein the ejector is communicated with the injection gas tank through an injection gas pipeline, a flow regulating valve, a flowmeter and a fifth cut-off valve are arranged on the injection gas pipeline, and the flow regulating valve, the flowmeter and the fifth cut-off valve are all electrically connected with the control part.
3. The blast furnace coal injection and pulverizing system provided with the coal powder bin negative pressure device according to claim 2, wherein the top of the coal powder bin is communicated with a pressure transmitter; a first cut-off valve and a second cut-off valve are arranged on the first branch, and a third cut-off valve and a fourth cut-off valve are respectively arranged at two ends of the second branch, which are positioned at the ejector; the pressure transmitter, the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are all electrically connected with the control portion.
4. A blast furnace coal injection and pulverizing system with a pulverized coal bunker negative pressure device as set forth in claim 3, wherein a wear-resistant metal hose is arranged on the moisture absorption tube.
5. A blast furnace coal injection and pulverizing system provided with a coal powder bin negative pressure device as claimed in claim 3, wherein the inner cavity of the ejector is lined with a wear-resistant ceramic layer.
6. A blast furnace coal injection and pulverizing system with a negative pressure device of a coal powder bin as set forth in claim 3, wherein the injection nozzle is made of wear-resistant metal or ceramic material.
7. The blast furnace coal injection pulverizing system with the pulverized coal bin negative pressure device according to claim 2, wherein the injection gas tank is a nitrogen gas tank.
8. The blast furnace coal-injection pulverizing system with a pulverized coal bin negative pressure device according to claim 1, wherein the mill is communicated with the bag collector through a bag collector inlet pipeline, and outlets of the first branch and the second branch are communicated with the bag collector inlet pipeline.
9. The blast furnace coal injection and pulverizing system with the coal powder bin negative pressure device according to claim 1, wherein a coal powder sieve is arranged between the cloth bag powder collector and the coal powder bin.
10. The blast furnace coal injection and pulverizing system with the coal powder bin negative pressure device according to claim 1, wherein the cloth bag powder collector is communicated with the main exhaust fan through a cloth bag outlet pipeline, and an outlet of the main exhaust fan is communicated with a diffusing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321635870.7U CN219991641U (en) | 2023-06-26 | 2023-06-26 | Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321635870.7U CN219991641U (en) | 2023-06-26 | 2023-06-26 | Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219991641U true CN219991641U (en) | 2023-11-10 |
Family
ID=88617302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321635870.7U Active CN219991641U (en) | 2023-06-26 | 2023-06-26 | Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219991641U (en) |
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2023
- 2023-06-26 CN CN202321635870.7U patent/CN219991641U/en active Active
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