CN217050689U - Device for conveying pulverized coal by using nitrogen - Google Patents
Device for conveying pulverized coal by using nitrogen Download PDFInfo
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- CN217050689U CN217050689U CN202220825284.8U CN202220825284U CN217050689U CN 217050689 U CN217050689 U CN 217050689U CN 202220825284 U CN202220825284 U CN 202220825284U CN 217050689 U CN217050689 U CN 217050689U
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- pulverized coal
- pipeline
- powder
- conveying pipeline
- nitrogen
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- 239000003245 coal Substances 0.000 title claims abstract description 111
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 86
- 238000010926 purge Methods 0.000 claims abstract description 21
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000000428 dust Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002817 coal dust Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000000034 method 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
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 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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Abstract
The utility model relates to the technical field of coal injection of iron-making blast furnaces, in particular to a device for conveying pulverized coal by utilizing 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 utility model discloses utilize nitrogen gas to sweep the replacement and carry out defeated powder operation, for the defeated powder mode of originally utilizing buggy storehouse unloading valve direct loading buggy tank car, avoid taking place the buggy raise dust, inorganization discharges the environmental protection incident.
Description
Technical Field
The utility model relates to a coal injection technical field of an iron-making blast furnace, in particular to a device 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 utilizing ash discharge valves at the lower parts of pulverized coal bins, and such operation modes have great safety and environmental protection operation risks, for example, air in the pulverized coal tankers cannot be effectively replaced, and when mixed pulverized coal and all-smoke pulverized coal with volatile components of more than 20% are hauled, the safety accidents of pulverized coal ignition and explosion easily occur; coal dust leakage is easy to occur in the process of loading coal dust into a coal dust tank car, secondary dust raising is caused, and environmental pollution accidents are caused; when the pulverized coal is transported by pulling, the pulverized coal cannot be effectively controlled to block a pulverized coal conveying pipeline; the flow speed and weight of the pulverized coal cannot be effectively controlled when the pulverized coal is transported by pulling.
SUMMERY OF THE UTILITY MODEL
The utility model provides an utilize nitrogen gas to carry out defeated whitewashed device of buggy to solve the defeated powder of current buggy jar car, during the buggy of various indexes of roping, the safety risk of existence is big, cause high volatile coal powder to take place to catch fire, explosion accident, buggy to leak, the unable problem of accurate control roping buggy volume easily.
In order to achieve the above object, the utility model adopts the following technical scheme:
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.
The beneficial effects of the utility model are that:
(1) the utility model utilizes nitrogen purging and replacement to carry out powder conveying operation, and compared with the original mode of directly loading the coal powder bin ash discharge valve into the coal powder tanker for conveying powder, the coal powder dust raising and the environment-friendly event of unorganized emission are avoided;
(2) the utility model uses nitrogen to sweep and replace the air in the coal powder tank car, thus avoiding the safety accidents of spontaneous combustion, ignition and explosion of coal powder and being safer and more reliable;
(3) the utility model utilizes the valve opening adjustment, the nitrogen purging valve opening and the coal powder bin weight display instrument to accurately control the coal powder output quantity;
(4) the utility model discloses utilize U type nitrogen gas to sweep the device and carry out the buggy and carry, simultaneously through different reducing pipeline, improved the flow speed of buggy, reduced the probability of buggy at the inside jam of pipeline, stopped at the defeated powder in-process of buggy, took place the trouble that buggy blockked up in the pipeline.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein the reference numbers are: 1. a pulverized coal tanker; 2. the tank truck is provided with a powder conveying pipeline; 3. a wear-resistant powder conveying metal hose; 4. a variable diameter powder conveying pipeline; 5, a U-shaped pipeline; 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 purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solution 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
In example 1, a method of using an apparatus for transporting pulverized coal using nitrogen gas is as follows:
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 coal powder 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 equipment;
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 (4) continuously opening the manual cut-off ball valve 6 of the nitrogen purging pipeline 7, continuously purging for 3 min, closing the manual cut-off ball valve 6 and the pressure pump of the coal powder tanker 1, and finishing the powder conveying operation.
Wherein after the pulverized coal tank car 1 reaches the powder conveying operation place, be connected with wear-resisting metal hose 3, the pulverized coal tank car 1 starts the negative pressure pump after connecting, the post operating personnel sweeps nitrogen gas this moment, the one fourth is opened to the replacement pipeline valve, when the pulverized coal tank car manometer reaches negative 0.1Mpa, open pneumatic plug valve 9, open manual gate valve 8 two-thirds again, sweep the manual ball valve 6 that cuts off on the pipeline 7 with nitrogen gas this moment and open to two-thirds department, the buggy in the pulverized coal storehouse is by manual gate valve 8, pneumatic gate valve 9 and reducing powder conveying pipeline, metal hose get into inside the pulverized coal tank car, the post personnel in time look over the pulverized coal storehouse material level display meter, can carry out the accurate control of pulverized coal volume through the aperture of nitrogen gas sweep valve, the aperture of 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, the nitrogen purging valve is closed after about 2 min to 3 min, the pressure pump of the coal powder tank truck is used, and the powder conveying operation is finished.
Claims (3)
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 pulverized coal bunker is characterized in that a pulverized coal conveying pipeline (10) is connected to the lower end of the pulverized coal bunker (12), the other end of the pulverized coal conveying pipeline (10) is connected with a pulverized coal tanker (1) through a pipeline, a nitrogen purging pipeline (7) is connected to the pulverized coal conveying pipeline (10), a manual cut-off ball valve (6) is arranged on the nitrogen purging pipeline (7), and the pulverized coal 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, wherein: 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 self-carrying 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 self-carrying 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220825284.8U CN217050689U (en) | 2022-04-11 | 2022-04-11 | Device for conveying pulverized coal by using nitrogen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220825284.8U CN217050689U (en) | 2022-04-11 | 2022-04-11 | Device for conveying pulverized coal by using nitrogen |
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| CN217050689U true CN217050689U (en) | 2022-07-26 |
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| CN202220825284.8U Active CN217050689U (en) | 2022-04-11 | 2022-04-11 | Device for conveying pulverized coal by using nitrogen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620489A (en) * | 2022-04-11 | 2022-06-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and method for conveying pulverized coal by using nitrogen |
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2022
- 2022-04-11 CN CN202220825284.8U patent/CN217050689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620489A (en) * | 2022-04-11 | 2022-06-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and method for conveying pulverized coal by using nitrogen |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240116 Address after: No. 1 Guojiazhuang, Jinya Town, Yuzhong County, Lanzhou City, Gansu Province, 730100 Patentee after: Jiugang Group Yuzhong Iron and Steel Co.,Ltd. Address before: 735100 Gansu city of Jiayuguan province Xiong Guan Road No. 12 Patentee before: GANSU JIU STEEL GROUP HONGXING IRON & STEEL Co.,Ltd. |
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| TR01 | Transfer of patent right |