CN114620489A - Device and method for conveying pulverized coal by using nitrogen - Google Patents
Device and method for conveying pulverized coal by using nitrogen Download PDFInfo
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- CN114620489A CN114620489A CN202210375839.8A CN202210375839A CN114620489A CN 114620489 A CN114620489 A CN 114620489A CN 202210375839 A CN202210375839 A CN 202210375839A CN 114620489 A CN114620489 A CN 114620489A
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- powder
- pulverized coal
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- coal
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- 239000003245 coal Substances 0.000 title claims abstract description 180
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 137
- 238000010926 purge Methods 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims description 15
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 5
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000002817 coal dust Substances 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
- B65G53/18—Gas pressure systems operating with fluidisation of the materials through a porous wall
- B65G53/22—Gas pressure systems operating with fluidisation of the materials through a porous wall the systems comprising a reservoir, e.g. a bunker
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/04—Loading land vehicles
- B65G67/06—Feeding articles or materials from bunkers or tunnels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/181—Preventing escape of dust by means of sealed systems
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention relates to the technical field of coal injection of an iron-making blast furnace, in particular to a device and a method for conveying pulverized coal by using nitrogen, which comprises a pulverized coal tank car and a pulverized coal bin, wherein the lower end of the pulverized coal bin is connected with a pulverized coal conveying pipeline, the other end of the pulverized coal conveying pipeline is connected with the pulverized coal tank car through a pipeline, the pulverized coal conveying pipeline is connected with a nitrogen purging pipeline, a manual cutting ball valve is arranged on the nitrogen purging pipeline, and the pulverized coal conveying pipeline is connected with the nitrogen purging pipeline through a U-shaped pipeline; the invention utilizes nitrogen purging replacement to carry out powder conveying operation, and avoids coal dust flying and environment-friendly events of unorganized emission compared with the original mode of directly loading coal powder into a coal powder tank car by utilizing a coal powder bin ash discharge valve.
Description
Technical Field
The invention relates to the technical field of coal injection of an iron-making blast furnace, in particular to a device and a method for conveying pulverized coal by using nitrogen.
Background
In the steel industry, blast furnace coal injection is a very important composition system, at present, part of blast furnaces adopt pulverized coal tankers, but pulverized coal is directly loaded into the pulverized coal tankers by using an ash discharge valve at the lower part of a pulverized coal bin, and the operation mode has great safety and environmental protection operation risks, for example, air in the pulverized coal tankers cannot be effectively replaced, and the safety accidents of pulverized coal ignition and explosion easily occur when mixed pulverized coal with volatile content of more than 20 percent and full-smoke pulverized coal are hauled; in the process of loading pulverized coal into a pulverized coal tank car, pulverized coal leakage is easy to occur, secondary dust raising is caused, and an environment-friendly pollution event is caused; when the pulverized coal is transported in a pulling mode, the pulverized coal cannot be effectively controlled to block a pulverized coal conveying pipeline; the flow speed and the weight of the pulverized coal cannot be effectively controlled during the pulling transportation of the pulverized coal.
Disclosure of Invention
The invention provides a device and a method for conveying pulverized coal by using nitrogen, which are used for solving the problems that the conventional pulverized coal tank truck is high in safety risk, ignition and explosion accidents of high volatile pulverized coal are easily caused, pulverized coal leakage is caused, and the amount of the pulverized coal conveyed by pulling cannot be accurately controlled when the pulverized coal is conveyed and pulverized coal with various indexes is conveyed by pulling.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an utilize nitrogen gas to carry out defeated device of powder of buggy, includes buggy tank car and buggy storehouse, buggy storehouse lower extreme is connected with defeated powder pipeline, and the other end of defeated powder pipeline passes through the pipeline to be connected with buggy tank car, be connected with nitrogen gas on the defeated powder pipeline and sweep the pipeline, be equipped with the manual ball valve that cuts off on the nitrogen gas sweeps the pipeline, defeated powder pipeline and nitrogen gas sweep the pipeline and pass through U type pipe connection.
Preferably, the powder conveying pipeline is sequentially connected with the variable-diameter powder conveying pipeline, the wear-resistant powder conveying metal hose and the powder conveying pipeline of the tank truck, and the diameters of the powder conveying pipeline, the variable-diameter powder conveying pipeline, the wear-resistant powder conveying metal hose and the powder conveying pipeline of the tank truck are sequentially reduced.
Preferably, the powder conveying pipeline is provided with a manual gate valve and a pneumatic gate valve.
Preferably, the use method of the device for conveying the pulverized coal by using the nitrogen comprises the following steps:
step S1: stopping the pulverized coal tank car to a pulverized coal bunker at a powder conveying operation place;
step S2: sequentially connecting a tank car on a pulverized coal tank car with a powder conveying pipeline, a wear-resistant powder conveying metal hose, a variable-diameter powder conveying pipeline and a powder conveying pipeline so as to enable the pulverized coal tank car to be communicated with a pulverized coal bin;
step S3: starting a negative pressure pump of the pulverized coal tank truck;
step S4: opening a manual cut-off ball valve on the nitrogen purging pipeline, and performing nitrogen replacement operation on the pulverized coal tank car;
step S5: then opening a pneumatic gate valve and a manual gate valve of the pulverized coal bin in sequence;
step S6: coal powder in the coal powder bin enters the coal powder tank car, and when the coal powder in the coal powder tank car reaches a preset tonnage, the manual gate valve and the pneumatic gate valve are closed;
step S7: and continuously opening a manual cutting ball valve of the nitrogen purging pipeline, continuously purging for 2-3 min, closing the manual cutting ball valve and the coal powder tank truck pressure pump, and ending the powder conveying operation.
Preferably, the boosting medium in the step S4 is heated nitrogen, and the temperature of the heated nitrogen is 80 ℃ to 120 ℃.
Preferably, the temperature of the pulverized coal in the pulverized coal bin is 80-86 ℃.
Preferably, the nitrogen replacement purging time in the step S4 is 3min to 5 min.
The invention has the beneficial effects that:
(1) the invention utilizes nitrogen purging replacement to carry out powder conveying operation, and avoids coal dust flying and environment-friendly events of unorganized emission compared with the original mode of directly loading coal powder into a coal powder tank car by utilizing a coal powder bin ash discharge valve;
(2) the nitrogen is used for purging and replacing air in the coal powder tank car, so that safety accidents of spontaneous combustion, ignition and explosion of coal powder can be avoided, and the coal powder tank car is safer and more reliable;
(3) the invention utilizes the valve opening adjustment, the nitrogen purging valve opening and the pulverized coal bunker weight display instrument to accurately control the pulverized coal output;
(4) the invention utilizes the U-shaped nitrogen blowing device to convey the coal powder, and simultaneously improves the flowing speed of the coal powder through different reducing pipelines, reduces the probability of blocking the coal powder in the pipelines, and avoids the fault of blocking the coal powder in the pipelines in the process of conveying the coal powder.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein the reference numerals are: 1. a pulverized coal tanker; 2. the tank car is provided with a powder conveying pipeline; 3. a wear-resistant powder conveying metal hose; 4. a variable diameter powder conveying pipeline; 5, U-shaped pipelines; 6. manually cutting off the ball valve; 7. purging the pipeline with nitrogen; 8. a manual gate valve; 9. a pneumatic gate valve; 10. a powder conveying pipeline; 12. a pulverized coal bunker.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1, a device for conveying pulverized coal by using nitrogen comprises a pulverized coal tank truck 1 and a pulverized coal bunker 12, wherein the lower end of the pulverized coal bunker 12 is connected with a pulverized coal conveying pipeline 10 of DN200mm, the pulverized coal conveying pipeline 10 is provided with a manual gate valve 8 and a pneumatic gate valve 9 (the use safety of the valves is ensured manually and pneumatically), the other end of the pulverized coal conveying pipeline 10 is sequentially connected with a reducing pulverized coal conveying pipeline 4 of DN150mm and a wear-resistant pulverized coal conveying metal hose 3 (the pipeline can swing due to the acting force on the pipeline when conveying pulverized coal, the pipeline can contact the ground, the service life of the pipeline and the device can be prolonged by using the wear-resistant pulverized coal conveying metal hose) and a pulverized coal conveying pipeline 2 of the tank truck, the diameter of the pipeline is sequentially reduced, finally the pulverized coal conveying pipeline 2 of the tank truck is connected with the pulverized coal tank truck 1, the pulverized coal conveying pipeline 10 is connected with a nitrogen purging pipeline 7, the nitrogen purging pipeline 7 is provided with a manual cut-off ball valve 6, the pulverized coal conveying pipeline 10 is connected with the purging pipeline 7 through a U-shaped pipeline 5 (the arrangement form of the U-shaped pipeline, the two segments are ensured, the pulverized coal flowing in the pipeline is further loosened by the airflow with different running tracks, so that the flowing speed and the suspension speed of the pulverized coal are increased, a pulverized coal running mode of nitrogen purging and tank car pumping is formed, and the pulverized coal cannot be blocked when being conveyed in the pipeline).
When the powder conveying system operates, the coal powder tank truck 1 and a powder conveying pipeline 2 carried by the coal powder tank truck are connected through a wear-resistant powder conveying metal hose 3, the wear-resistant powder conveying metal hose 3 is then connected with a variable-diameter powder conveying pipeline 4 and a powder conveying pipeline 10, finally, a complete powder conveying system is formed between the coal powder tank truck 1 and a coal powder bin 12, nitrogen is filled into the coal powder tank truck 1 at a constant speed through a negative pressure pump carried by the coal powder tank truck 1, air and nitrogen in the coal powder tank truck are replaced, a foundation is laid for reducing the oxygen content in a container for storing coal powder, and when coal powder in the coal powder bin flows downwards, the flowing speed of the coal powder is improved through different variable-diameter pipelines, and the probability of blocking the coal powder in the pipeline is reduced; the U-shaped nitrogen purging pipeline is arranged on the DN200mm powder conveying pipeline 10, the arrangement form of the U-shaped pipeline ensures that two branches are segmented, and airflow with different running tracks further loosens coal powder flowing inside the pipeline, so that the flowing speed and the suspension speed of the coal powder are increased, a nitrogen purging mode and a coal powder pumping mode of a tank truck are formed, and the coal powder cannot be blocked when conveyed in the pipeline.
Example 2
On the basis of embodiment 1, the use method of the device for conveying the pulverized coal by using the nitrogen comprises the following steps:
step S1: the pulverized coal tanker 1 is stopped at a pulverized coal bunker 12 at a powder conveying operation site;
step S2: sequentially connecting a tank truck on a pulverized coal tank truck 1 with a powder conveying pipeline 2, a wear-resistant powder conveying metal hose 3, a variable-diameter powder conveying pipeline 4 and a powder conveying pipeline 10, so that the pulverized coal tank truck 1 is communicated with a pulverized coal bin 12, and the temperature of pulverized coal in the pulverized coal bin 12 is 86 ℃;
step S3: starting a negative pressure pump of the pulverized coal tank truck 1;
step S4: opening a manual cut-off ball valve 6 on a nitrogen purging pipeline 7, and performing nitrogen replacement operation on the pulverized coal tank car 1, wherein the temperature of nitrogen is 80 ℃, and the nitrogen replacement purging time is 5 min;
step S5: then the pneumatic gate valve 9 and the manual gate valve 8 of the pulverized coal bin 12 are opened in sequence, and the manual gate valve ensures the use safety of the device;
step S6: the coal powder in the coal powder bin 12 enters the coal powder tank car 1, and when the coal powder in the coal powder tank car reaches the preset tonnage, the manual gate valve 8 and the pneumatic gate valve 9 are closed;
step S7: and (3) continuously opening the manual cutting ball valve 6 of the nitrogen purging pipeline 7, continuously purging for 3min, closing the manual cutting ball valve 6 and the pressure pump of the coal powder tanker 1, and finishing the powder conveying operation.
Example 3
On the basis of embodiment 1, the use method of the device for conveying the pulverized coal by using the nitrogen comprises the following steps:
step S1: the pulverized coal tanker 1 is stopped at a pulverized coal bunker 12 at a powder conveying operation site;
step S2: sequentially connecting a tank truck with a powder conveying pipeline 2 on a coal powder tank truck 1 with a wear-resistant powder conveying metal hose 3, a variable-diameter powder conveying pipeline 4 and a powder conveying pipeline 10 to ensure that the coal powder tank truck 1 is communicated with a coal powder bin 12, wherein the temperature of coal powder in the coal powder bin 12 is 80 ℃;
step S3: starting a negative pressure pump of the pulverized coal tank truck 1;
step S4: opening a manual cut-off ball valve 6 on a nitrogen purging pipeline 7, and performing nitrogen replacement operation on the coal powder tank car 1, wherein the temperature of nitrogen is 120 ℃, and the nitrogen replacement purging time is 3 min;
step S5: then the pneumatic gate valve 9 and the manual gate valve 8 of the pulverized coal bin 12 are opened in sequence, and the manual gate valve ensures the use safety of the device;
step S6: the coal powder in the coal powder bin 12 enters the coal powder tank truck 1, and when the coal powder in the coal powder tank truck reaches a preset tonnage, the manual gate valve 8 and the pneumatic gate valve 9 are closed;
step S7: and (3) continuously opening the manual cutting ball valve 6 of the nitrogen purging pipeline 7, continuously purging for 2 min, closing the manual cutting ball valve 6 and the pressure pump of the coal powder tanker 1, and finishing the powder conveying operation.
Compared with the working process of the embodiment 2 and the working process of the embodiment 3, after the pulverized coal tank truck 1 reaches a powder conveying operation place, the pulverized coal tank truck 1 is connected with the wear-resistant metal hose 3, the negative pressure pump is started after the connection, at the moment, a post operator purges nitrogen, one fourth of a replacement pipeline valve is opened, when a pulverized coal tank truck pressure gauge reaches negative 0.1Mpa, the pneumatic plug valve 9 is opened, two thirds of the manual gate valve is opened, at the moment, the manual cut-off ball valve 6 on the nitrogen purging pipeline 7 is opened to the two thirds, pulverized coal in a pulverized coal bin enters the pulverized coal tank truck through the manual gate valve 8, the pneumatic gate valve 9, the variable-diameter powder conveying pipeline and the metal hose, the post operator timely checks a pulverized coal bin level display meter, and can accurately control the pulverized coal amount through the opening of the nitrogen purging valve and the opening of the manual gate valve. When the coal powder in the coal powder tank truck reaches the preset tonnage, the manual gate valve 8 and the pneumatic gate valve 9 are closed in time, the manual cut-off ball valve 6 on the nitrogen purging pipeline 7 is opened to two thirds, the residual coal powder in the pipeline is purged completely, the nitrogen purging valve is closed after about 2 min to 3min, the pressure pump of the coal powder tank truck is used, and the powder conveying operation is finished.
Claims (7)
1. The utility model provides an utilize nitrogen gas to carry out defeated powder of buggy device, includes buggy tank car and buggy storehouse, its characterized in that: the coal powder conveying device is characterized in that a powder conveying pipeline (10) is connected to the lower end of the coal powder bin (12), the other end of the powder conveying pipeline (10) is connected with a coal powder tank truck (1) through a pipeline, a nitrogen purging pipeline (7) is connected to the powder conveying pipeline (10), a manual cutting ball valve (6) is arranged on the nitrogen purging pipeline (7), and the powder conveying pipeline (10) is connected with the nitrogen purging pipeline (7) through a U-shaped pipeline (5).
2. The device for conveying pulverized coal by using nitrogen according to claim 1, characterized in that: the powder conveying pipeline (10) is sequentially connected with the variable-diameter powder conveying pipeline (4), the wear-resistant powder conveying metal hose (3) and the tank truck with the powder conveying pipeline (2), and the diameters of the powder conveying pipeline (10), the variable-diameter powder conveying pipeline (4), the wear-resistant powder conveying metal hose (3) and the tank truck with the powder conveying pipeline (2) are sequentially reduced.
3. The device for conveying pulverized coal by using nitrogen according to claim 1 or 2, wherein: and a manual gate valve (8) and a pneumatic gate valve (9) are arranged on the powder conveying pipeline (10).
4. The use method of the device for conveying the pulverized coal by using the nitrogen is characterized by comprising the following steps of:
step S1: the pulverized coal tank car (1) is parked at a pulverized coal bunker (12) at a powder conveying operation place;
step S2: the method comprises the following steps of sequentially connecting a tank truck with a powder conveying pipeline (2) on a pulverized coal tank truck (1), a wear-resistant powder conveying metal hose (3), a variable-diameter powder conveying pipeline (4) and a powder conveying pipeline (10) to enable the pulverized coal tank truck (1) to be communicated with a pulverized coal bunker (12);
step S3: starting a negative pressure pump of the pulverized coal tank car (1);
step S4: opening a manual cut-off ball valve (6) on a nitrogen purging pipeline (7) to perform nitrogen replacement operation on the pulverized coal tank car (1);
step S5: then opening a pneumatic gate valve (9) and a manual gate valve (8) of the pulverized coal bin (12) in sequence;
step S6: coal powder in the coal powder bin (12) enters the coal powder tank car (1), and when the coal powder in the coal powder tank car reaches a preset tonnage, the manual gate valve (8) and the pneumatic gate valve (9) are closed;
step S7: and (3) continuously opening a manual cutting ball valve (6) of the nitrogen purging pipeline (7), continuously purging for 2-3 min, closing the manual cutting ball valve (6) and a pressure pump of the pulverized coal tanker (1), and finishing the powder conveying operation.
5. The use method of the device for conveying pulverized coal by using nitrogen according to claim 4 is characterized in that: the boosting medium in the step S4 is heated nitrogen, and the temperature of the heated nitrogen is 80-120 ℃.
6. The use method of the device for conveying pulverized coal by using nitrogen according to claim 4 is characterized in that: the temperature of the coal powder in the coal powder bin (12) is 80-86 ℃.
7. The use method of the device for conveying pulverized coal by using nitrogen according to claim 4 is characterized in that: and in the step S4, the nitrogen replacement and purging time is 3-5 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210375839.8A CN114620489A (en) | 2022-04-11 | 2022-04-11 | Device and method for conveying pulverized coal by using nitrogen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210375839.8A CN114620489A (en) | 2022-04-11 | 2022-04-11 | Device and method for conveying pulverized coal by using nitrogen |
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| CN114620489A true CN114620489A (en) | 2022-06-14 |
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| CN202210375839.8A Pending CN114620489A (en) | 2022-04-11 | 2022-04-11 | Device and method for conveying pulverized coal by using nitrogen |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237698A (en) * | 1999-06-29 | 1999-12-08 | 宝山钢铁(集团)公司 | Carbon-bearing dust-collected collection blowing method and its equipment |
| CN2778830Y (en) * | 2004-12-28 | 2006-05-10 | 首钢总公司 | Ash conveying equipment for blast furnace gas dry method dust collection tanker |
| CN203768385U (en) * | 2014-04-15 | 2014-08-13 | 四川川锅环保工程有限公司 | Nitrogen gas purging device for blast furnace coal gas pipeline |
| CN213327681U (en) * | 2020-10-22 | 2021-06-01 | 马鞍山钢铁股份有限公司 | Be used for blast furnace gravity, cyclone to put grey system integrated device jointly |
| CN217050689U (en) * | 2022-04-11 | 2022-07-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device for conveying pulverized coal by using nitrogen |
-
2022
- 2022-04-11 CN CN202210375839.8A patent/CN114620489A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237698A (en) * | 1999-06-29 | 1999-12-08 | 宝山钢铁(集团)公司 | Carbon-bearing dust-collected collection blowing method and its equipment |
| CN2778830Y (en) * | 2004-12-28 | 2006-05-10 | 首钢总公司 | Ash conveying equipment for blast furnace gas dry method dust collection tanker |
| CN203768385U (en) * | 2014-04-15 | 2014-08-13 | 四川川锅环保工程有限公司 | Nitrogen gas purging device for blast furnace coal gas pipeline |
| CN213327681U (en) * | 2020-10-22 | 2021-06-01 | 马鞍山钢铁股份有限公司 | Be used for blast furnace gravity, cyclone to put grey system integrated device jointly |
| CN217050689U (en) * | 2022-04-11 | 2022-07-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device for conveying pulverized coal by using nitrogen |
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