CN109943675B - Integral movable rapid blocking removing device and method for pulverized coal branch pipe - Google Patents
Integral movable rapid blocking removing device and method for pulverized coal branch pipe Download PDFInfo
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- CN109943675B CN109943675B CN201910305371.3A CN201910305371A CN109943675B CN 109943675 B CN109943675 B CN 109943675B CN 201910305371 A CN201910305371 A CN 201910305371A CN 109943675 B CN109943675 B CN 109943675B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention discloses an integrated movable rapid blocking removing device and method for a pulverized coal branch pipe, belonging to the field of metallurgy and coal chemical industry, wherein the device comprises: the powder collecting tank is used for collecting the blocked coal powder in the coal powder branch pipe; the blockage removing system is arranged on the powder collecting tank and is used for being detachably connected with the pulverized coal branch pipe; the pressurizing system is arranged on the blockage removing system and is used for being connected with an external pressurizing device; the powder conveying system is arranged on the powder collecting tank and connected with the pressurizing system and is used for conveying the pulverized coal in the powder collecting tank outwards; the fluidization system is arranged on the powder collecting tank and connected with the pressurizing system and is used for assisting the pulverized coal in the powder collecting tank to flow to the powder conveying system; and the exhaust system is arranged on the powder collecting tank and is used for discharging air pressure in the powder collecting tank. The invention has the advantages of high efficiency, rapidness, energy conservation, environmental protection and the like, can avoid the air discharge and environmental pollution in the process of clearing and blocking the pulverized coal branch pipe, and simultaneously, can spray the collected pulverized coal into a blast furnace for effective utilization and save resources.
Description
Technical Field
The invention belongs to the technical fields of metallurgy, coal chemical industry and the like, and particularly relates to an integrated movable rapid blocking removing device and method for a coal dust branch pipe.
Background
With the continuous upgrading of the environmental protection policy of the steel industry in China, the blast furnace ironmaking production has increasingly stringent environmental protection requirements for each unit. The blast furnace coal injection system adopts a main coal powder pipe to convey coal powder to a distributor through compressed air and nitrogen, and then to each tuyere through a coal powder branch pipe. The pneumatic conveying adopts high-pressure gas to carry pulverized coal to flow in a closed pipeline, the flow velocity in a pulverized coal branch pipe is low, and once the conveying gas power is insufficient, pulverized coal particles are settled, so that the pulverized coal branch pipe is easy to be blocked, and the blast furnace coal injection is influenced. Once the coal breakage of the coal powder branch pipe is detected, the blockage is removed, and five conventional blockage removal methods are adopted in the production field: the first is to close the pulverized coal branch pipe shut-off valve, switch to the compressed air to purge into the blast furnace, the operation can be cleared when the blockage is not serious, and the operation can aggravate the pipeline blockage when the blockage length is longer; the second is to disconnect the tail end of the pulverized coal branch pipe from the spray gun for pressure relief, the operation directly discharges pulverized coal in the air, so as to cause environmental pollution, and a large amount of pulverized coal is deposited on the tuyere platform and the furnace shell, so that explosion safety hazards exist; the third is seen in patent CN202322879U, the concrete operation is to close the pulverized coal branch pipe shut-off valve, and set up the pulverized coal collecting device on the distributor platform, the pulverized coal collected by this method needs to be recycled manually to the gas area of the distributor platform, has increased the risk of the operator; the fourth patent is shown in the patent CN207699616U, and the specific operation is that a cloth bag with a cut-off valve is arranged between a rubber pipe at the tail end of a coal dust branch pipe and a spray gun, the pressure of the branch pipe can be relieved after the branch pipe is blocked, but when the coal dust branch pipe is seriously blocked, the pressure in a pipeline cannot be increased again, and the pipeline is difficult to clear; the fifth patent is shown in patent CN207047267U, a blocking-clearing enclosing pipe is arranged above the tuyere, the pulverized coal collected by the method is difficult to effectively utilize, the mechanism is huge and complex, and meanwhile, the enclosing pipe affects the hoisting of a tuyere platform, so that the implementation is inconvenient.
Disclosure of Invention
In view of the above, the invention aims to provide an integrated movable rapid blockage removing device and method for a coal dust branch pipe, which can avoid air discharge and environmental pollution in the blockage removing process of the coal dust branch pipe, and can also spray collected coal dust into a blast furnace for effective utilization and resource saving.
The invention is realized by the following technical scheme:
the invention provides an integrated movable rapid blocking removing device for a pulverized coal branch pipe, which comprises the following components: the powder collecting tank is used for collecting the blocked coal powder in the coal powder branch pipe; the blockage removing system is arranged on the powder collecting tank and is used for being detachably connected with the pulverized coal branch pipe; the pressurizing system is arranged on the blockage removing system and is used for being connected with an external pressurizing device; the powder conveying system is arranged on the powder collecting tank and connected with the pressurizing system and is used for conveying the pulverized coal in the powder collecting tank outwards; the fluidization system is arranged on the powder collecting tank and connected with the pressurizing system and is used for assisting the pulverized coal in the powder collecting tank to flow to the powder conveying system; and the exhaust system is arranged on the powder collecting tank and is used for discharging air pressure in the powder collecting tank.
The blockage removing system comprises a blockage removing pipeline, a first blockage removing valve, a second blockage removing valve, a blockage removing quick-release hose and a quick-release tee joint, wherein the blockage removing pipeline is arranged on the powder collecting tank, and the first blockage removing valve is arranged on the side connected with one end of the blockage removing quick-release hose; the quick-release tee joint is connected with the gas branch pipe, the spray gun and the blockage-removing quick-release hose, and a second blockage-removing valve is arranged on the quick-release tee joint and at the connection side of the other end of the blockage-removing quick-release hose.
Further, the pressurization system comprises a pressurization pipeline, a first pressurization valve and a second pressurization valve which are arranged on the pressurization pipeline, one end of the pressurization pipeline is connected with an external pressurization device through a pressurization quick-release hose, and the other end of the pressurization pipeline is connected to the blockage clearing pipeline and is arranged opposite to the first blockage clearing valve and the powder collecting tank.
Further, the powder conveying system is composed of a powder conveying pipeline and a powder conveying valve arranged on the powder conveying pipeline, one end of the powder conveying pipeline is connected to the powder collecting tank, and the other end of the powder conveying pipeline is connected between a first pressurizing valve and a second pressurizing valve in the pressurizing system.
Further, the fluidization system comprises fluidization pipeline, fluidization valve, fluidization device, fluidization pipeline one end is connected on the pressurization pipeline and is set up for first pressurization valve and second pressurization valve opposite side, and the other end is connected with the fluidization device who sets up in the powder receiving tank bottom, the fluidization valve is located on the fluidization pipeline.
Further, the exhaust system is composed of an exhaust pipeline, an exhaust valve arranged on the exhaust pipeline and a filtering device.
Further, a first pressure sensor is further arranged on the blockage removing pipeline, and a second pressure sensor is further arranged on the powder collecting tank.
Further, the powder collecting tank is arranged on the frame, and a guide wheel is arranged at the bottom of the frame.
The invention also provides a rapid blocking removing method for the pulverized coal branch pipe, which comprises the following steps: firstly, observing and determining that a coal dust branch pipe is blocked by using a tuyere peep hole; then, cutting off the connection between the pulverized coal branch pipe and the spray gun, and connecting the rapid blockage removing device according to any one of claims 1 to 8 between the pulverized coal branch pipe and the spray gun; then, after the pressurization system of the rapid blockage removing device pressurizes the pulverized coal branch pipe to a set pressure, the blockage removing system collects blocked pulverized coal in the pulverized coal branch pipe into the powder collecting tank until the pulverized coal branch pipe is not blocked; then, the pulverized coal collected in the powder collecting tank is sprayed back into the blast furnace through the fluidization system and the powder conveying system until the pulverized coal is no longer in the powder collecting tank; and finally, removing the rapid blocking removing device and recovering the connection between the pulverized coal branch pipe and the spray gun.
The invention has the advantages that:
1. compared with the original process system, the invention realizes the integrated operation of pressurization, blockage removal and powder conveying, and has simpler structure;
2. compared with the original process system, the powder collecting tank is arranged on the bracket with the guide wheel, can flexibly move on the tuyere platform, and realizes quick blockage removal;
3. compared with the original process system, the invention can re-spray the blocked coal powder into the blast furnace for recycling by adopting pneumatic conveying, thereby saving resources.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a process flow diagram illustrating the present invention;
marking: the device comprises a first pressure sensor 1, a first blocking clearing valve 2, a second pressure valve 3, a second pressure sensor 4, a powder collecting tank 5, a support 6, a powder conveying valve 7, a first pressure valve 8, a fluidization valve 9, a pressurizing quick-release hose 10, a guide wheel, a fluidization device 12, a powder conveying pipeline 13, a blocking clearing pipeline 14, an exhaust valve 15, a filtering device 16, a blocking clearing quick-release hose 17, a second blocking clearing valve 18, a quick-release tee joint 19, a second cutting valve 20, a pulverized coal branch pipe 21, a first cutting valve 22, a third cutting valve 23 and a tuyere peeping hole 24.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
As shown in fig. 1, the integrated movable rapid blockage removing device for the pulverized coal branch pipe comprises a powder collecting tank 5, a pressurizing system, a blockage removing system, a powder conveying system, a fluidization system and an exhaust system. The powder collecting tank 5 is used for collecting the coal powder blocked in the coal powder branch pipe 21; the blockage removing system is arranged on the powder collecting tank and is used for being detachably connected with the pulverized coal branch pipe 21, and consists of a blockage removing pipeline 14, a first blockage removing valve 2, a second blockage removing valve 18, a blockage removing quick-release hose 17 and a quick-release tee joint 19, wherein the blockage removing pipeline 14 is arranged on the powder collecting tank 5, and the first blockage removing valve 2 is arranged on the side connected with one end of the blockage removing quick-release hose 17; the quick release tee joint 19 is connected with a gas branch pipe 21, a spray gun and a blockage removal quick release hose 17, and a second blockage removal valve 18 is arranged on the connection side of the quick release hose 17 and the other end of the blockage removal quick release hose; the pressurizing system is arranged on the blockage removing system and is used for being connected with an external pressurizing device, and consists of a pressurizing pipeline, a first pressurizing valve 8 and a second pressurizing valve 3 which are arranged on the pressurizing pipeline, wherein one end of the pressurizing pipeline is connected with the external pressurizing device through a pressurizing quick-release hose 10, and the other end of the pressurizing pipeline is connected on the blockage removing pipeline and is arranged at the opposite side relative to the first blockage removing valve 2 and the powder collecting tank 5; the powder conveying system is arranged on the powder collecting tank 5 and connected with the pressurizing system, and is used for conveying the pulverized coal in the powder collecting tank 5 outwards, and consists of a powder conveying pipeline 13 and a powder conveying valve 7 arranged on the powder conveying pipeline 13, wherein one end of the powder conveying pipeline 13 is connected with the powder collecting tank 5, and the other end is connected between a first pressurizing valve 8 and a second pressurizing valve 3 in the pressurizing system; the fluidization system is arranged on the powder collecting tank 5 and connected with the pressurizing system, is used for assisting the pulverized coal in the powder collecting tank 5 to flow to the powder conveying system, and consists of a fluidization pipeline, a fluidization valve 9 and a fluidization device 12, wherein one end of the fluidization pipeline is connected to the pressurizing pipeline and is arranged on the opposite side of the first pressurizing valve and the second pressurizing valve relative to the first pressurizing valve, the other end of the fluidization pipeline is connected with the fluidization device arranged at the bottom of the powder collecting tank, and the fluidization valve 9 is arranged on the fluidization pipeline; the exhaust system is arranged on the powder collecting tank 5 and is used for discharging air pressure in the powder collecting tank 5, and consists of an exhaust pipeline, an exhaust valve 15 arranged on the exhaust pipeline and a filtering device 16.
The clear stifled pipeline in this embodiment is last still to be equipped with first pressure sensor 1, still is equipped with second pressure sensor 4 on the receipts powder jar 5, can be used to the pressure value of inspection during the respective work.
The powder collecting tank 5 in the embodiment is arranged on the frame 6, and a guide wheel 11 is arranged at the bottom of the frame 6. The powder collecting tank can be conveniently moved to each air port at any time to clear blockage.
The integral movable rapid blocking removing device for the pulverized coal branch pipe is used in working, and the rapid blocking removing method comprises the following steps: firstly, observing and determining that a coal dust branch pipe is blocked by using a tuyere peep hole; then, cutting off the connection between the pulverized coal branch pipe and the spray gun, and connecting a rapid blocking clearing device between the pulverized coal branch pipe and the spray gun; then, after the pressurization system of the rapid blockage removing device pressurizes the pulverized coal branch pipe to a set pressure, the blockage removing system collects blocked pulverized coal in the pulverized coal branch pipe into the powder collecting tank until the pulverized coal branch pipe is not blocked; then, the pulverized coal collected in the powder collecting tank is sprayed back into the blast furnace through the fluidization system and the powder conveying system until the pulverized coal is no longer in the powder collecting tank; and finally, removing the rapid blocking removing device and recovering the connection between the pulverized coal branch pipe and the spray gun.
Specifically, when it is observed from the tuyere peep hole 24 that the pulverized coal branch pipe is indeed blocked, the following steps are performed:
the method comprises the steps of firstly, immediately closing a third cut-off valve 23 on a spray gun, then closing a first cut-off valve 22 and a second cut-off valve 20 on a coal dust branch pipe 21, connecting a quick release tee 19 between the second cut-off valve 20 on the coal dust branch pipe 21 and the third cut-off valve 23 on the spray gun, and connecting a pressurizing quick release hose 10;
step two, closing the powder conveying valve 7, the fluidization valve 9 and the first blockage removing valve 2; the exhaust valve 15, the first pressurizing valve 8, the second pressurizing valve 3, the second blocking clearing valve 18 and the second cut-off valve 20 are sequentially opened, after the pulverized coal branch pipe and the blocking clearing and quick-release hose 17 are pressurized to a set pressure (the initial value is 0.6 MPa), the second pressurizing valve 3 is closed, the first blocking clearing valve 2 is opened, high-pressure gas in the pulverized coal branch pipe 21 and the blocking clearing and quick-release hose 17 carries pulverized coal to be rapidly discharged into the powder collecting tank 5, and the gas is discharged into the atmosphere through the exhaust valve 15 and the filter device 16, and the pulverized coal is remained in the powder collecting tank 5 under the action of the filter device 16. When the first pressure sensor 1 and the second pressure sensor 4 show that the pressure in the powder collecting tank 5 is equal to the set pressure (the initial value is 0.001 MPa), the first blocking valve 2 is closed, the second pressurizing valve 3 is opened, and the above operation is repeated.
Step three, the second blocking removal valve 18 is closed, a third cut-off valve 23 on the spray gun, a second cut-off valve 20 on the pulverized coal branch pipe 21 and a first cut-off valve 22 are opened, whether coal flow continuously appears is observed in a tuyere peeping hole 24, if so, blocking removal is stopped, and if not, the operation of the step two is repeated;
step four, when the coal dust branch pipe 21 is confirmed to be cleared, a first cut-off valve 22 and a second cut-off valve 20 on the coal dust branch pipe are closed, a first pressurizing valve 9, a first blocking clearing valve 2 and an exhaust valve 15 are closed, a second blocking clearing valve 18 and a second pressurizing valve 3 are opened, a fluidization valve 9 is opened to pressurize the coal dust collecting tank 5 to a set pressure (initial value of 0.6 MPa), then a powder conveying valve 7 is opened, and coal dust in the coal dust collecting tank 5 is sprayed into a blast furnace, so that coal dust recovery is completed;
and fifthly, after the pulverized coal in the powder collecting tank 5 is emptied, the fluidization valve 9 and the second blocking valve 18 are closed, and the second cut-off valve 20 and the first cut-off valve 22 on the pulverized coal branch pipe are opened, so that the normal coal injection of the blast furnace is recovered.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The utility model provides a mobilizable quick clear stifled device of integral type for buggy branch pipe which characterized in that includes:
a powder collecting tank (5) for collecting the blocked coal powder in the coal powder branch pipe (21);
the blockage-removing system is arranged on the powder collecting tank and is used for being detachably connected with the pulverized coal branch pipe, and consists of a blockage-removing pipeline (14), a first blockage-removing valve (2), a second blockage-removing valve (18), a blockage-removing quick-release hose (17) and a quick-release tee joint (19), wherein the blockage-removing pipeline is arranged on the powder collecting tank, and a first blockage-removing valve is arranged on the blockage-removing pipeline and is connected with one end of the blockage-removing quick-release hose; the quick-release tee joint is connected with the gas branch pipe, the spray gun and the blockage-removing quick-release hose, and a second blockage-removing valve is arranged on the connection side of the quick-release tee joint and the other end of the blockage-removing quick-release hose;
the pressurizing system is arranged on the blockage removing system and is used for being connected with an external pressurizing device, and consists of a pressurizing pipeline, a first pressurizing valve (8) and a second pressurizing valve (3) which are arranged on the pressurizing pipeline, wherein one end of the pressurizing pipeline is connected with the external pressurizing device through a pressurizing quick-release hose (10), and the other end of the pressurizing pipeline is connected on the blockage removing pipeline and is arranged opposite to the first blockage removing valve and the powder collecting tank;
the powder conveying system is arranged on the powder collecting tank and connected with the pressurizing system and is used for conveying the pulverized coal in the powder collecting tank outwards;
the fluidization system is arranged on the powder collecting tank and connected with the pressurizing system and is used for assisting the pulverized coal in the powder collecting tank to flow to the powder conveying system;
the exhaust system is arranged on the powder collecting tank and is used for discharging air pressure in the powder collecting tank;
firstly, observing and determining that a coal dust branch pipe is blocked by using a tuyere peep hole; cutting off the connection between the pulverized coal branch pipe and the spray gun, and connecting the rapid blocking clearing device between the pulverized coal branch pipe and the spray gun; then, after the pressurization system of the rapid blockage removing device pressurizes the pulverized coal branch pipe to a set pressure, the blockage removing system collects blocked pulverized coal in the pulverized coal branch pipe into the powder collecting tank until the pulverized coal branch pipe is not blocked; then, the pulverized coal collected in the powder collecting tank is sprayed back into the blast furnace through the fluidization system and the powder conveying system until the pulverized coal is no longer in the powder collecting tank; and finally, removing the rapid blocking removing device and recovering the connection between the pulverized coal branch pipe and the spray gun.
2. The integrated movable rapid blocking removing device for the pulverized coal branch pipe according to claim 1, wherein the powder conveying system comprises a powder conveying pipeline (13) and a powder conveying valve (7) arranged on the powder conveying pipeline, one end of the powder conveying pipeline is connected to the powder collecting tank, and the other end of the powder conveying pipeline is connected between a first pressurizing valve and a second pressurizing valve in the pressurizing system.
3. The integrated movable rapid blocking removal device for the pulverized coal branch pipe according to claim 2, wherein the fluidization system comprises a fluidization pipeline, a fluidization valve (9) and a fluidization device (12), one end of the fluidization pipeline is connected to the pressurization pipeline and is arranged on the opposite side of the first pressurization valve and the second pressurization valve relative to the first pressurization valve, the other end of the fluidization pipeline is connected with the fluidization device arranged at the bottom of the powder collection tank, and the fluidization valve is arranged on the fluidization pipeline.
4. A pulverized coal pipe integrated movable rapid plugging device according to claim 3, characterized in that the exhaust system consists of an exhaust pipe, an exhaust valve (15) arranged on the exhaust pipe and a filtering device (16).
5. The integrated movable rapid blockage removing device for the pulverized coal branch pipe of claim 4, wherein the blockage removing pipeline is further provided with a first pressure sensor (1), and the powder collecting tank is further provided with a second pressure sensor (4).
6. The integrated movable rapid blocking remover for pulverized coal branch pipes according to any one of claims 1-5, wherein the powder collecting tank is arranged on a frame (6), and a guide wheel (11) is arranged at the bottom of the frame.
7. The rapid blocking removing method for the pulverized coal branch pipe is characterized by comprising the following steps of: firstly, observing and determining that a coal dust branch pipe is blocked by using a tuyere peep hole; then, cutting off the connection between the pulverized coal branch pipe and the spray gun, and connecting the rapid blockage removing device according to any one of claims 1 to 6 between the pulverized coal branch pipe and the spray gun; then, after the pressurization system of the rapid blockage removing device pressurizes the pulverized coal branch pipe to a set pressure, the blockage removing system collects blocked pulverized coal in the pulverized coal branch pipe into the powder collecting tank until the pulverized coal branch pipe is not blocked; then, the pulverized coal collected in the powder collecting tank is sprayed back into the blast furnace through the fluidization system and the powder conveying system until the pulverized coal is no longer in the powder collecting tank; and finally, removing the rapid blocking removing device and recovering the connection between the pulverized coal branch pipe and the spray gun.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910305371.3A CN109943675B (en) | 2019-04-16 | 2019-04-16 | Integral movable rapid blocking removing device and method for pulverized coal branch pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910305371.3A CN109943675B (en) | 2019-04-16 | 2019-04-16 | Integral movable rapid blocking removing device and method for pulverized coal branch pipe |
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| CN109943675A CN109943675A (en) | 2019-06-28 |
| CN109943675B true CN109943675B (en) | 2023-09-12 |
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| CN201910305371.3A Active CN109943675B (en) | 2019-04-16 | 2019-04-16 | Integral movable rapid blocking removing device and method for pulverized coal branch pipe |
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| CN202072711U (en) * | 2011-04-21 | 2011-12-14 | 冷水江钢铁有限责任公司 | Pulverized coal recovery and blowing device of blast furnace |
| CN202688351U (en) * | 2012-05-14 | 2013-01-23 | 宋英玲 | Trolley device for reversely blowing pulverized coal |
| CN209798006U (en) * | 2019-04-16 | 2019-12-17 | 中冶赛迪技术研究中心有限公司 | Integrated movable quick blockage clearing device for pulverized coal branch pipe |
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2019
- 2019-04-16 CN CN201910305371.3A patent/CN109943675B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1064314A (en) * | 1992-04-08 | 1992-09-09 | 冶金工业部钢铁研究总院 | Transport method for concentrate phase coal spray in blast furnace |
| JP2006063417A (en) * | 2004-08-30 | 2006-03-09 | Jfe Steel Kk | Method for canceling clogging in nozzle of facility for blowing pulverized coal |
| CN201459155U (en) * | 2009-07-13 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Device for reclaiming coal dust of blast furnace |
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