CN210528959U

CN210528959U - Blockage clearing pulverized coal recovery device for blast furnace coal injection gun

Info

Publication number: CN210528959U
Application number: CN201920662695.8U
Authority: CN
Inventors: 岳小三; 邓建伟; 诸善财; 陈浩
Original assignee: Jiangyin Xingcheng Special Steel Works Co Ltd
Current assignee: Jiangyin Xingcheng Special Steel Works Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-05-15
Anticipated expiration: 2029-05-10

Abstract

The utility model relates to a blockage clearing pulverized coal recovery device for a blast furnace coal injection gun, belonging to the technical field of blast furnace ironmaking coal injection. The novel coal injection and dust removal device comprises a collecting box, a keel and a filter bag, wherein a coal injection branch pipe pipeline and an ash discharge pipeline are arranged on the collecting box, a flange is fixedly arranged at the top of the collecting box, a three-way pipeline is arranged on the flange, one end of the three-way pipeline is communicated with the collecting box, the other two ends of the three-way pipeline are respectively provided with a waste gas discharge port and a compressed air inlet, a disc chuck support is fixed in the collecting box, the keel is fixed on the disc chuck support, the filter bag is sleeved outside the keel, a fourth valve is arranged on the coal injection branch pipe pipeline, a fifth valve is arranged on the ash discharge pipeline, and a first valve, a second valve and a third valve. This application not only dredges the coal injection branch pipe of chute blockage, has reduced workman's intensity of labour to the application sack cleaner principle has solved the waste coal dust polluted environment of exhaust moreover, has avoided causing the secondary raise dust.

Description

Blockage clearing pulverized coal recovery device for blast furnace coal injection gun

Technical Field

The utility model relates to a blockage clearing pulverized coal recovery device for a blast furnace coal injection gun, belonging to the technical field of blast furnace ironmaking coal injection.

Background

During the iron-making production process of the blast furnace coal injection gun, the coal injection system utilizes compressed air to convey pulverized coal to the near end of the blast furnace through a pipeline, the pulverized coal is respectively connected with air supply devices in front of air ports of the blast furnace after being branched by a coal distributor, and the pulverized coal is injected into the blast furnace through the coal injection gun, so that the effects of reducing the coke ratio of the blast furnace and the cost before iron are achieved. The coal powder blockage phenomenon is inevitably generated in the use process of the blast furnace coal injection gun, and the blockage needs to be cleared in time. If the coal injection gun is not cleaned in time after coal blockage, the coal injection gun is blocked, the longer the blocking time is, the more difficult the blocking time is, and the coal injection gun is blocked for a long time, the non-uniformity of the circumferential coal injection of the blast furnace is caused, the smooth operation of the blast furnace is influenced, so the coal injection gun must be cleaned in time after coal blockage occurs. The coal-injection gun is characterized in that compressed air is continuously blown into an injection branch pipe and the compressed air blown into the injection branch pipe is released manually, and all coal dust blocked in the injection branch pipe is discharged until the coal dust in the injection branch pipe can be automatically sprayed out.

The blockage clearing work of the coal injection gun has the following hazards:

1. the physical strength of workers is greatly consumed, and the blockage removing treatment time is long;

2. the discharged coal dust pollutes the environment, and the field environment is also polluted, so that secondary dust can be formed, and the field needs to be cleaned in time to ensure the requirement of clean production;

3. waste of manpower, material resources and financial resources is caused;

4. the discharged waste coal powder can be sucked by a dust remover of a casting house, so that certain hidden trouble exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a device for recovering the blockage-removing pulverized coal of a blast furnace coal injection gun aiming at the prior art, which can rapidly remove the blockage after the coal injection branch pipe is blocked, thereby reducing the labor intensity of workers; the coal powder blocked in the coal injection branch pipe is directly discharged into the filter bag, so that the environmental pollution is avoided.

The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a clear stifled buggy recovery unit of blast furnace coal injection rifle, includes collecting box, fossil fragments and filter bag, set up coal injection branch pipe way and dust discharge pipeline on the collecting box, the fixed flange that is equipped with in collecting box top, be equipped with the tee bend pipeline on the flange, tee bend pipeline one end link up with the collecting box, the other both ends of tee bend pipeline are exhaust port and compressed air import respectively, fixed colored dish support in the collecting box, fossil fragments are fixed in on the colored dish support, the filter bag cover is located the fossil fragments outside, be equipped with the fourth valve on the coal injection branch pipe way, be equipped with the fifth valve on the dust discharge pipeline, be equipped with first valve, second valve and third valve on the tee bend pipeline respectively.

The collecting box is arranged on the trolley and is fixed on the trolley through the fixing frame.

The collecting box is a conical structural member with a wide upper part and a narrow lower part.

The ash discharge pipeline is arranged at the bottom of the collecting box, and the coal injection branch pipeline is arranged on the side surface of the collecting box.

The first valve and the fifth valve are ball valves with the diameter of 15mm respectively, and the second valve, the third valve and the fourth valve are ball valves with the diameter of 25mm respectively.

Compared with the prior art, the utility model has the advantages of: a blast furnace coal injection gun blockage clearing pulverized coal recovery device not only dredges coal injection branch pipes of coal blockage by manually controlling compressed air pulse, injection and siphon principles of workers and reduces the labor intensity of the workers, but also solves the problem that discharged waste pulverized coal pollutes the environment by applying a bag-type dust remover principle and avoids secondary dust raising; the waste coal powder is discharged to the fixed ash discharge position, so that the hidden danger caused by the suction of the waste coal powder by a dust remover of a cast house is avoided.

Drawings

FIG. 1 is a schematic view of a device for recovering the blockage-removing pulverized coal of a blast furnace coal injection lance according to an embodiment of the present invention;

in the figure, a cart 1, a fixing frame 2, a compressed air inlet 3, a second valve 4, a waste gas discharge port 5, a collection box 6, a first valve 7, a three-way pipeline 8, a third valve 9, a keel 10, a flange 11, a fourth valve 12, a coal injection branch pipeline 13, a faceplate support 14, a filter bag 15, an ash discharge pipeline 16 and a fifth valve 17 are arranged.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, the blockage-removing pulverized coal recovery device for the blast furnace coal injection gun in the embodiment comprises a tapered collection box 6 with a wide top and a narrow bottom, a keel 10 and a filter bag 15, wherein an ash discharge pipeline 16 is arranged at the bottom of the collection box 6, a coal injection branch pipeline 13 is arranged on the side face of the collection box 6, a flange 11 is fixedly arranged at the top of the collection box 6, a three-way pipeline 8 is arranged on the flange 11, one end of the ash discharge pipeline 16, one end of the coal injection branch pipeline 13 and one end of the three-way pipeline 8 are respectively communicated with the inside of the collection box 6, a faceplate support 14 is fixed in the collection box 6, and the keel 10 is fixed on the faceplate support 14, so that five waste damaged cloth bags obtained by gas dust. The other two ends of the three-way pipeline 8 are respectively used as a waste gas discharge port 5 and a compressed air inlet 3, three branch pipes of the three-way pipeline 8 are respectively provided with a first valve 7, a second valve 4 and a third valve 9, a branch pipe of the three-way pipeline 8 used as a waste gas discharge pipeline is provided with a first ball valve with the diameter of 15mm, a branch pipe of the three-way pipeline 8 used as a compressed air pipeline is provided with a second ball valve with the diameter of 25mm, the rest branch pipes are provided with third ball valves with the diameter of 25mm, a coal injection branch pipe pipeline 13 is provided with a fourth ball valve with the diameter of 25mm, and an ash discharge pipeline 16 is provided with a fifth ball valve with the diameter of 15. The coal injection branch pipe is connected with the coal injection branch pipe pipeline 13 through a first hose, and quick connectors are arranged at two ends of the first hose respectively, so that the coal injection branch pipe, the first hose and the coal injection branch pipe pipeline 13 are fixedly connected and communicated. The compressed air generating device is connected with the compressed air pipeline through a second hose, and quick connectors are arranged at two ends of the second hose respectively, so that the compressed air generating device is communicated with the compressed air pipeline, and compressed air flows into the compressed air pipeline.

The fixing frame 2 is welded at the bottom of the collecting box 6, and the collecting box 6 is fixed on the trolley 1 through the fixing frame 2, so that the collecting box 6 can be flexibly transported.

This application is carried out clear operating procedure when stifled work to coal-injection gun as follows:

1. blast furnace coal injection branch pipe is connected to coal injection branch pipe line 13 in this application through first hose and quick-operation joint on to lock fast interface.

2. And connecting compressed air to the compressed air pipeline through a second hose and a quick connector, and locking the quick connector.

3. The valve states are then confirmed such that the first valve 7, the fifth valve 17 are in a closed state and the second valve 4, the third valve 9, the fourth valve 12 are in an open state.

4. And opening an injection valve on the coal injection branch pipe, and opening a compressed air control switch to enable compressed air to flow into the collecting box 6 after entering the three-way pipeline 8 and to be shunted into the coal injection branch pipe pipeline 13 to pressurize the blocked coal injection branch pipe.

5. When the pressure is filled to the condition that the compressed air does not flow (determined according to the vibration conditions of the first hose and the second hose, and when the first hose and the second hose do not vibrate, the compressed air does not flow), at the moment, the first valve 7 is opened to timely discharge the filled pressure and the compressed air to the atmosphere, and a siphon principle is generated on the collecting tank 6 due to the fact that the second valve 4 is not closed while the pressure is discharged, so that negative pressure is generated in the collecting tank 6, and the pulverized coal blocked in the coal injection branch pipe is further sucked out.

6. The effect of dredging the coal injection pipeline can not be achieved once through pressurization, the first valve 7 is closed again to conduct pressurization again, the first valve 7 is opened again when the pressurized air does not flow during pressurization, the blocked coal powder is sucked out, and the blocked coal injection branch pipe is dredged.

7. And (5) repeatedly executing the

steps

5 and 6 for a plurality of times until the blocked coal injection branch pipe is dredged.

8. Whether the coal injection branch pipe is dredged or not can be judged by closing the second valve 4. When the

steps

5 and 6 are repeatedly executed for a plurality of times, the second valve 4 is closed, and when a large amount of gas is sprayed from the first valve 7 after the second valve 4 is closed, the coal injection branch pipe is unblocked, and the gas in the coal injection branch pipe is discharged through the collecting box 6. At the moment, the injection valve and the compressed air control switch on the coal injection branch pipe are closed, the second valve 4 is opened, the pressure in the collecting box 6 and the pressure between the compressed air control switch and the second valve 4 are discharged, and then the first valve 7, the fourth valve 12 and the second valve 4 are closed. And finishing the dredging work of the coal injection branch pipe.

In the process of sucking out the pulverized coal, the filter bag 15 is arranged in the collection box 6 for isolation, so the sucked pulverized coal cannot be discharged to the atmosphere along with the discharged compressed air and can be adsorbed on the filter bag 15 or fall into the collection box 6, and the filter bag 15 in the collection box 6 plays a role in filtering and removing the powder.

Also can adsorb the buggy when 15 filter powders of filter bag, gumming, nevertheless through closing first valve 7 when pressurizing coal injection branch pipe once more, compressed air has also carried out a blowback to filter bag 15, is unlikely to a large amount of buggy on the one hand and blocks up filter bag 15 and influence the 15 gas permeability of filter bag, and on the other hand is to carrying out the gumming to filter bag 15, and the buggy that the blowback falls down can fall into the storage ash section (the conic section of collecting box promptly) of collecting box 6 automatically.

After dredging the coal injection branch pipe for a certain number of times, the pulverized coal in the collecting box 6 reaches a certain amount, and the collecting box 6 is organically discharged from a fixed place.

The ash discharging operation steps after the coal powder in the collection box 6 is full are as follows:

1. the collecting box 6 is pushed to a fixed ash discharging position by the cart 1 for ash discharging operation.

2. The ash discharge pipe 16 is connected with a quick connector, so that the ash discharge pipe 16 is connected to a fixed ash discharge position and the quick connector is locked.

3. The valve states are then confirmed such that the first valve 7, the fourth valve 12 are in a closed state and the second valve 4, the third valve 9 and the fifth valve 17 are in an open state.

4. And opening a compressed air control switch to perform back-blowing ash removal and ash discharge actions on the collecting box 6. If the ash hole of the conical section of the collecting box 6 is blocked, the first valve 7 can be opened, the coal dust column is loosened by using the siphon principle, then the first valve 7 is closed to discharge ash, and the coal dust in the collecting box 6 is discharged after repeated times.

5. And after the ash removal is finished, closing the compressed air control switch, loosening the quick joint on the ash discharge pipeline 16 and the quick joint of the compressed air pipeline, closing the first valve 7, the third valve 9 and the fifth valve 17, and pushing the cart 1 to a specified position to be placed in order.

When the coal injection pipeline is manually cleared in the prior art, the compressed air leather hose is directly plugged in and pulled out to pressurize and discharge the coal injection branch pipe to dredge the coal injection branch pipe, the labor intensity of workers is high, pulverized coal is also discharged in an unorganized mode, the environmental sanitation and the working environment of the workers are affected, and the physical and psychological health of the workers cannot be guaranteed. In the past, workers have plugged the coal injection branch pipe, the coal powder is full, the face is dark, the site is also the coal powder, and the site sanitary cleaning treatment is inconvenient. The coal dust cleaning device is convenient to move, the blockage cleaning labor intensity is reduced, the coal dust is discharged in an organized mode, the environmental sanitation and the working environment are improved, cleaning is not needed on the site, the human resource is saved, and the physical and mental health of workers is guaranteed.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a clear stifled buggy recovery unit of blast furnace coal-injection rifle which characterized in that: the novel coal injection and dust removal device comprises a collecting box, a keel and a filter bag, wherein a coal injection branch pipe pipeline and an ash discharge pipeline are arranged on the collecting box, a flange is fixedly arranged at the top of the collecting box, a three-way pipeline is arranged on the flange, one end of the three-way pipeline is communicated with the collecting box, the other two ends of the three-way pipeline are respectively provided with a waste gas discharge port and a compressed air inlet, a disc chuck support is fixed in the collecting box, the keel is fixed on the disc chuck support, the filter bag is sleeved outside the keel, a fourth valve is arranged on the coal injection branch pipe pipeline, a fifth valve is arranged on the ash discharge pipeline, and a first valve, a second valve and a third valve.

2. The blockage-removing pulverized coal recovery device for the blast furnace coal injection gun according to claim 1, characterized in that: the collecting box is arranged on the trolley and is fixed on the trolley through the fixing frame.

3. The blockage-removing pulverized coal recovery device for the blast furnace coal injection gun according to claim 1, characterized in that: the collecting box is a conical structural member with a wide upper part and a narrow lower part.

4. The blockage-removing pulverized coal recovery device for the blast furnace coal injection lance according to claim 1 or 3, characterized in that: the ash discharge pipeline is arranged at the bottom of the collecting box, and the coal injection branch pipeline is arranged on the side surface of the collecting box.

5. The blockage-removing pulverized coal recovery device for the blast furnace coal injection gun according to claim 1, characterized in that: the first valve and the fifth valve are ball valves with the diameter of 15mm respectively, and the second valve, the third valve and the fourth valve are ball valves with the diameter of 25mm respectively.