CN214004694U - Pulverized coal distributor with airflow purging function - Google Patents
Pulverized coal distributor with airflow purging function Download PDFInfo
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- CN214004694U CN214004694U CN202022613624.4U CN202022613624U CN214004694U CN 214004694 U CN214004694 U CN 214004694U CN 202022613624 U CN202022613624 U CN 202022613624U CN 214004694 U CN214004694 U CN 214004694U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a pulverized coal distributor with airflow purging function, which comprises a pulverized coal distributor body and a purging device; the purging device consists of a high-pressure nitrogen pipeline, a purging coal powder conveying pipeline, a coal powder recovery tank and a discharge cloth bag; the two sides of the coal powder distributor body are respectively provided with a nitrogen inlet pipe and a blowing coal powder outlet pipe, the nitrogen inlet pipe is connected with a high-pressure nitrogen pipeline, the blowing coal powder outlet pipe is connected with a coal powder recovery tank through a blowing coal powder conveying pipeline, and the top of the coal powder recovery tank is connected with a discharge cloth bag through a gas pipeline. The utility model can clean the inside of the pulverized coal distributor in time by arranging the purging device, thereby preventing blockage; by simplifying the pipe connection structure, it is possible to further prevent clogging and to avoid leakage of pulverized coal due to resonance of piping.
Description
Technical Field
The utility model relates to a blast furnace smelting technical field especially relates to a buggy distributor that possesses air current and sweeps function.
Background
The coal powder distributor is a device for uniformly distributing air and coal powder to a plurality of secondary air pipes in a coal injection system of an iron-making blast furnace, and is generally applied to the coal injection system of the blast furnace in an iron-making plant. After the capacity of the blast furnace is expanded, the coal injection quantity is increased, the number of the coal guns can be increased only under the condition that the caliber of the coal guns is not changed, and correspondingly, the number of the coal powder outlets of the coal powder distributor is also increased. Due to the fact that the number of pipe holes on the coal powder distributor is large, the coal injection amount is increased, when coal quality of coal powder changes or external temperature changes violently, the coal powder flow speed in the individual coal powder output branch pipelines changes rapidly, so that blockage is easily caused, and the coal powder flow speed in the individual coal powder output branch pipelines is slowed down. Such a clogging failure due to fluctuation of the coal flow cannot be predicted effectively, and is therefore difficult to avoid. In addition, the coal powder outlet pipe of the existing coal powder distributor is connected with the coal powder output branch pipeline through a flange, when the input total coal quantity is adjusted, the pressure of the inlet pipe section of the coal powder distributor is increased, the overall resonance of a pipe system is easily caused, the pipeline can be seriously collapsed, a pipeline support is cracked, and meanwhile, the leakage occurs at the joint of the flange and the pipeline due to the aging of a sealing body.
Disclosure of Invention
The utility model provides a coal powder distributor with airflow purging function, which can clear the inside of the coal powder distributor in time by arranging a purging device to prevent blockage; by simplifying the pipe connection structure, it is possible to further prevent clogging and to avoid leakage of pulverized coal due to resonance of piping.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pulverized coal distributor with an airflow purging function comprises a pulverized coal distributor body, wherein a pulverized coal inlet of the pulverized coal distributor body is connected with a pulverized coal input pipeline, and a plurality of pulverized coal outlets are respectively connected with a pulverized coal output branch pipeline; the device also comprises a purging device; the purging device consists of a high-pressure nitrogen pipeline, a purging coal powder conveying pipeline, a coal powder recovery tank and a discharge cloth bag; the two sides of the coal powder distributor body are respectively provided with a nitrogen inlet pipe and a blowing coal powder outlet pipe, the nitrogen inlet pipe is connected with a high-pressure nitrogen pipeline, the blowing coal powder outlet pipe is connected with a coal powder recovery tank through a blowing coal powder conveying pipeline, and the top of the coal powder recovery tank is connected with a discharge cloth bag through a gas pipeline.
The nitrogen inlet pipe is connected with the high-pressure nitrogen pipeline, the blowing coal powder outlet pipe is connected with the blowing coal powder conveying pipeline through quick connectors.
The coal dust recovery tank is provided with a coal dust outlet pipe; and valves are respectively arranged on the high-pressure nitrogen pipeline, the pulverized coal outlet pipe and the gas pipeline.
A pulverized coal outlet pipe is arranged at a pulverized coal outlet of the pulverized coal distributor body and is fixedly connected with the pulverized coal output branch pipeline through a sleeve; the inner hole of the sleeve is a taper hole which shrinks from two ends to the middle; the connecting ends of the pulverized coal outlet pipe and the pulverized coal output branch pipe are respectively inserted into the sleeve, and the two ends of the sleeve are welded and sealed with the corresponding pulverized coal outlet pipe and the corresponding pulverized coal output branch pipe.
And a gap of 3-8 mm is reserved at the joint of the pulverized coal outlet pipe and the pulverized coal output branch pipeline.
The connecting end of the pulverized coal outlet pipe and the connecting end of the pulverized coal output branch pipeline are provided with cones matched with the inner hole of the sleeve.
The coal powder distributor body is of a disc-shaped structure, and a flow guide cone is arranged inside the coal powder distributor body; the coal powder inlet is arranged at the central position of the bottom of the coal powder distributor body, and the coal powder outlet pipe is arranged at the outer side of the coal powder distributor body and is uniformly arranged along the circumferential direction.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the conventional plane coal powder distributor does not have the function of clearing blockage, and 2 blockage clearing openings which are horizontally arranged oppositely are additionally arranged at two ends of the coal powder distributor to ensure that the coal powder distributor has the function of purging; residual coal dust in the coal dust distributor body can be processed on line by manually opening a valve on the high-pressure nitrogen pipeline;
2) the flange connection between the pulverized coal outlet pipe and the pulverized coal output branch pipeline is changed into sleeve type fixed connection, so that the connection strength is improved, the pulverized coal flowability at the pulverized coal outlet can be improved, the coal flow pressure is balanced, the pressure loss in the pulverized coal distributor is effectively reduced, and partial region blockage caused by internal vortex is prevented; by simplifying the pipeline connection structure, the leakage of the pulverized coal caused by the resonance of the pipeline system is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a pulverized coal distributor with an airflow purging function according to the present invention.
Fig. 2 is a schematic structural diagram of the coal powder distributor body of the present invention (to avoid the confusion of the drawing, only the coal powder output branch pipes on both sides are shown).
Fig. 3 is a view a-a in fig. 2 (the pulverized coal output branch pipes are not shown to avoid a disorder of the drawing).
Fig. 4 is a schematic diagram of the pulverized coal outlet pipe and the pulverized coal output branch pipe of the present invention connected by a sleeve.
In the figure: 1. coal powder distributor body 2, coal powder input pipeline 3, coal powder output branch pipeline 4, sleeve 5, nitrogen gas inlet pipe 6, blowing coal powder outlet pipe 7, quick joint 8, coal powder recovery tank 9, discharge cloth bag 10, valve 11, coal powder outlet pipe 12, high-pressure nitrogen gas pipeline
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the pulverized coal distributor with airflow purging function of the present invention comprises a pulverized coal distributor body 1, wherein the pulverized coal distributor body 1 is provided with a pulverized coal inlet connected to a pulverized coal input pipeline 2, and a plurality of pulverized coal outlets respectively connected to a pulverized coal output branch pipeline 3 (as shown in fig. 2); the device also comprises a purging device; the purging device consists of a high-pressure nitrogen pipeline 12, a purging coal powder conveying pipeline, a coal powder recovery tank 8 and a discharge cloth bag 9; the two sides of the coal powder distributor body 1 are respectively provided with a nitrogen inlet pipe 5 and a blowing coal powder outlet pipe 6 (shown in figure 3), the nitrogen inlet pipe 5 is connected with a high-pressure nitrogen pipeline 12, the blowing coal powder outlet pipe 6 is connected with a coal powder recovery tank 8 through a blowing coal powder conveying pipeline, and the top of the coal powder recovery tank 8 is connected with a discharge cloth bag 9 through a gas pipeline.
The nitrogen inlet pipe 5 is connected with the high-pressure nitrogen pipeline 12, the sweeping coal powder outlet pipe 6 is connected with the sweeping coal powder conveying pipeline through quick connectors 7.
The coal dust recovery tank 8 is provided with a coal dust outlet pipe; the high-pressure nitrogen pipeline 12, the pulverized coal outlet pipe and the gas pipeline are respectively provided with a valve 10.
A pulverized coal outlet pipe 11 is arranged at a pulverized coal outlet of the pulverized coal distributor body 1, and the pulverized coal outlet pipe 11 is fixedly connected with the pulverized coal output branch pipeline 3 through a sleeve 4; as shown in fig. 4, the inner hole of the sleeve 4 is a taper hole which shrinks from two ends to the middle; the connecting ends of the coal powder outlet pipe 11 and the coal powder output branch pipe 3 are respectively inserted into the casing pipe 4, and the two ends of the casing pipe 4 are welded and sealed with the corresponding coal powder outlet pipe 11 and the corresponding coal powder output branch pipe 3.
And a gap of 3-8 mm is reserved at the joint of the coal powder outlet pipe 11 and the coal powder output branch pipeline 3.
The connecting end of the coal powder outlet pipe 11 and the connecting end of the coal powder output branch pipeline 3 are provided with cones matched with the inner hole of the sleeve 4.
The coal powder distributor body 1 is of a disc-shaped structure, and a flow guide cone is arranged inside the coal powder distributor body; the coal powder inlet is arranged at the central position of the bottom of the coal powder distributor body 1, and the coal powder outlet pipe 11 is arranged at the outer side of the coal powder distributor body 1 and is uniformly arranged along the circumferential direction.
A possess the air current and sweep buggy distributor of function sets up a nitrogen gas entry and one relatively and sweeps buggy export (as shown in fig. 3) in buggy distributor body 1's both sides, and nitrogen gas inlet tube 5 and sweep buggy outlet pipe 6 average level setting make buggy distributor body 1 possess the air current and sweep the function. When the coal powder distributor is used, residual coal powder in the coal powder distributor body 1 can be cleaned on line only by manually opening the valve on the high-pressure nitrogen pipeline 12. Namely, high-pressure nitrogen is blown in from the nitrogen inlet pipe 5, and residual coal powder in the coal powder distributor body 1 is led out from the blown coal powder outlet pipe 6. The extracted coal powder enters a coal powder recovery tank 8 to be recovered, and the discharged cloth bag 9 discharges the nitrogen after purging, so that dust pollution in the process can be prevented.
Under the accident condition, the valve on the high-pressure nitrogen pipeline 12 is opened to rapidly dredge hardened coal dust residues in the coal dust distributor body 1, so that the spontaneous combustion of accumulated coal in the dead zone in the coal dust distributor body 1 is prevented, and the fire hazard is avoided.
The coal powder outlet pipe 11 is connected with the coal powder output branch pipeline 3 through a sleeve 4, an inner hole is a conical sleeve 4 and forms a plug-in structure with the 2 pipelines 11 and 3, expansion joints are reserved between the end faces of the 2 pipelines 11 and 3, and the sleeve 4 is sealed with the 2 pipelines 11 and 3 through welding. Compared with a flange connection structure, the sleeve type connection structure is lighter in weight, resonance can be effectively reduced, coal dust leakage caused by piping resonance is avoided, and accordingly maintenance cost is reduced.
The coal powder distributor body 1 adopts a split structure, and comprises a shell body consisting of a top cover, a seat ring and a bottom cover, wherein a flow guide cone is arranged in the shell body; the top cover and the bottom cover are provided with arc-shaped surfaces matched with the flow guide cones, and the top cover, the seat ring and the bottom cover are fixedly connected through a plurality of bolts arranged along the circumferential direction. A plurality of coal dust outlet pipes 11 are arranged on the seat ring along the circumferential direction, and the nitrogen inlet pipe 5 and the purging coal dust outlet pipe 6 are also oppositely arranged on two sides of the seat ring.
The coal powder input pipeline 2 is arranged at the bottom of the coal powder distributor body 1, the coal powder output branch pipeline 3 extends downwards at the outer end far away from the coal powder distributor body 1, and the radius of the bent part of the pipeline is not less than 2m so as to eliminate piping resonance caused by direct impact of coal flow on the pipe wall during pressurized coal injection; the coal powder output branch pipeline 3 is provided with a pipe clamp at the lower part for fixing, and further vibration is prevented.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.
Claims (7)
1. A pulverized coal distributor with an airflow purging function comprises a pulverized coal distributor body, wherein a pulverized coal inlet of the pulverized coal distributor body is connected with a pulverized coal input pipeline, and a plurality of pulverized coal outlets are respectively connected with a pulverized coal output branch pipeline; it is characterized by also comprising a purging device; the purging device consists of a high-pressure nitrogen pipeline, a purging coal powder conveying pipeline, a coal powder recovery tank and a discharge cloth bag; the two sides of the coal powder distributor body are respectively provided with a nitrogen inlet pipe and a blowing coal powder outlet pipe, the nitrogen inlet pipe is connected with a high-pressure nitrogen pipeline, the blowing coal powder outlet pipe is connected with a coal powder recovery tank through a blowing coal powder conveying pipeline, and the top of the coal powder recovery tank is connected with a discharge cloth bag through a gas pipeline.
2. The pulverized coal distributor with the airflow purging function as claimed in claim 1, wherein the nitrogen inlet pipe and the high-pressure nitrogen pipeline, and the purged pulverized coal outlet pipe and the purged pulverized coal conveying pipeline are connected through quick connectors.
3. The pulverized coal distributor with the air flow purging function as claimed in claim 1, wherein the pulverized coal recovery tank is provided with a pulverized coal outlet pipe; and valves are respectively arranged on the high-pressure nitrogen pipeline, the pulverized coal outlet pipe and the gas pipeline.
4. The pulverized coal distributor with the airflow purging function as claimed in claim 1, wherein a pulverized coal outlet pipe is arranged at a pulverized coal outlet of the pulverized coal distributor body, and the pulverized coal outlet pipe is fixedly connected with the pulverized coal output branch pipeline through a sleeve; the inner hole of the sleeve is a taper hole which shrinks from two ends to the middle; the connecting ends of the pulverized coal outlet pipe and the pulverized coal output branch pipe are respectively inserted into the sleeve, and the two ends of the sleeve are welded and sealed with the corresponding pulverized coal outlet pipe and the corresponding pulverized coal output branch pipe.
5. The pulverized coal distributor with the airflow purging function as claimed in claim 4, wherein a gap of 3-8 mm is left at the joint of the pulverized coal outlet pipe and the pulverized coal output branch pipeline.
6. The pulverized coal distributor with the airflow purging function as claimed in claim 4, wherein the connecting end of the pulverized coal outlet pipe and the connecting end of the pulverized coal output branch pipe are tapered to match with the inner hole of the sleeve.
7. The pulverized coal distributor with the airflow purging function as claimed in claim 1 or 4, wherein the pulverized coal distributor body is of a disc-shaped structure, and a flow guide cone is arranged inside the pulverized coal distributor body; the coal powder inlet is arranged at the central position of the bottom of the coal powder distributor body, and the coal powder outlet pipe is arranged at the outer side of the coal powder distributor body and is uniformly arranged along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022613624.4U CN214004694U (en) | 2020-11-12 | 2020-11-12 | Pulverized coal distributor with airflow purging function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022613624.4U CN214004694U (en) | 2020-11-12 | 2020-11-12 | Pulverized coal distributor with airflow purging function |
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| CN214004694U true CN214004694U (en) | 2021-08-20 |
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| CN202022613624.4U Active CN214004694U (en) | 2020-11-12 | 2020-11-12 | Pulverized coal distributor with airflow purging function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113679069A (en) * | 2021-09-01 | 2021-11-23 | 安徽澳贝诗生物科技有限公司 | Processing equipment for suckling pig feed |
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2020
- 2020-11-12 CN CN202022613624.4U patent/CN214004694U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113679069A (en) * | 2021-09-01 | 2021-11-23 | 安徽澳贝诗生物科技有限公司 | Processing equipment for suckling pig feed |
| CN113679069B (en) * | 2021-09-01 | 2022-11-04 | 安徽澳贝诗生物科技有限公司 | Processing equipment for suckling pig feed |
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