Iron-making blast furnace gas dust removal device

Abstract

The utility model relates to an ironmaking blast furnace gas dust removal device which comprises an ash tank, the top of the ash tank is connected with an ash collecting pipe, the bottom of the ash tank is provided with an ash discharge pipe, the bottom of the ash discharge pipe is connected with a storage bin, the side face of the ash discharge pipe is connected with a trans-gas ash channel with height difference, and the trans-gas ash channel is connected with a first cooling bin. The first cooling bin is connected with a second cooling bin through a conveying pipeline, the conveying pipeline is connected with a purging pipeline, and the second cooling bin is connected with a vacuum suction and discharge tank transport vehicle. According to the utility model, the characteristic of a reverse pipeline is utilized to solve the problem that large solids are mixed in coal gas ash, and the continuous discharge of coal gas ash is not influenced. In order to solve the problem of high temperature of coal gas ash, a two-stage cooling bin and a purging mode are adopted, so that the closed ash discharge temperature requirement of the suction and discharge tank transport vehicle can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to ironmaking equipment, especially a kind of ironmaking blast furnace coal gas dust removal device. BACKGROUND

[0002] Ironmaking blast furnace produces coal gas ash, and existing coal gas ash is collected by dust removal equipment. Coal gas ash contains a large amount of coal gas, nitrogen and a small amount of other harmful mixed gas. In the operation of the ash unloading rotating equipment, shear defects are formed, causing jamming hazards and damage to the transmission components, and forming ash unloading accidents, as well as causing huge coal gas and dust pollution accidents and large-area environmental pollution.

[0003] The temperature in the dust collector is as high as 200-300°C, and the sealed suction and discharge tank transport vehicle can only adapt to a temperature of up to 55°C. Due to the fluctuation of high pressure, the refractory material sprayed on the inner wall of the dust removal equipment and pipeline falls off due to high temperature or vibration, and the hardness and area of the large solid block are uncertain. After the diameter of the pipeline is changed, the difference between the diameter of the pipeline and the receiving pipe diameter of the suction and discharge vehicle is large, and serious problems such as jamming and blockage often occur.

[0004] The existing patent CN 219526685 U discloses a blast furnace coal gas dust collector ash discharge device and system, and the blast furnace coal gas dust collector ash discharge device comprises a dust collector, a bin pump and a suction and discharge tank vehicle. The ash discharge port of the dust collector is communicated with the ash discharge port of the bin pump below through a pipeline, the ash discharge port of the bin pump is communicated with the inlet of the suction and discharge tank below through a pipeline, and the ash discharge port of the dust collector and the pump ash inlet pipeline are provided with an ash inlet valve group. The fluidized inlet of the bin is communicated with a nitrogen gas source. Since the ash discharge port is located below the bin pump, large block materials are mixed and prone to blockage, which is not conducive to stable conveying of materials.

[0005] The existing patent CN201120405248.8 discloses a blast furnace coal gas ash pneumatic multi-stage conveying system, which comprises a bin pump, the bin pump has an exhaust valve and an air inlet valve, the top end of the bin pump is connected to a dust collector cone section, the bottom end of the bin pump is connected to a dust conveying pipeline through a discharge valve, one end of the dust conveying pipeline is provided with an air compressor or an air tank, the other end of the dust conveying pipeline is connected to a dust receiving bin through a bin top powder collecting device, and the bin pump and the dust collector cone section are sequentially provided with an ash unloading valve, a gas closing valve and a material feeding valve. A bin pump high material level meter is arranged on the upper end of the bin pump, a bin pump bottom material level meter is arranged on the lower end of the bin pump, and a dust collector low material level meter is arranged at the lower end of the dust collector. Signals are sent through high and low material level meters to realize full automation of the dust conveying process. The whole process is carried out in a closed environment. The patent has the defect that large block materials are mixed and prone to blockage, and since there are many rotating equipment such as valves, the control system is complex, which increases the probability of failure. SUMMARY

[0006] The utility model wants to solve the technical problem to provide a kind of ironmaking blast furnace coal gas dust removal device, solve the problem of high temperature of blast furnace coal gas ash and the difficulty of ash discharge caused by mixing large solid.

[0007] To realize the above-mentioned purpose, the utility model adopts the following technical scheme realization:

[0008] A kind of ironmaking blast furnace coal gas dust removal device, including ash tank, ash tank top connection dust collecting pipe, ash tank bottom is equipped with ash pipe, the bottom of ash pipe is connected with storage bin, the side surface of ash pipe is connected with the reverse type coal gas ash passageway with height difference, the reverse type coal gas ash passageway is connected with first cooling bin, first cooling bin is connected with second cooling bin by conveying pipeline, conveying pipeline 7 is connected with purging pipeline, second cooling bin is connected with vacuum suction and discharge tank transport vehicle.

[0009] The reverse type coal gas ash passageway includes horizontal pipe section one, lifting pipe section, horizontal pipe section two, descending pipe section connected in sequence, horizontal pipe section one is connected with ash pipe, descending pipe section is connected with first cooling bin, horizontal pipe section two is higher than horizontal pipe section one by more than 1.5m.

[0010] The bottom of the storage bin is provided with a discharge port.

[0011] The wall of the first cooling bin and the second cooling bin is wound with cooling water pipes.

[0012] The first cooling bin and the second cooling bin are provided with pressure reducing valves.

[0013] The conveying pipeline is provided with a fan.

[0014] The purging pipeline is connected with a gas source.

[0015] The purging pipeline is provided with an explosion-proof electric valve.

[0016] The ash pipe, the reverse type coal gas ash passageway, the conveying pipeline and the second cooling bin discharge port are provided with on-off valves.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The utility model uses the characteristics of reverse type pipeline to solve the problem of mixing large solid in coal gas ash without affecting continuous discharge of coal gas ash.Two-stage cooling bin and purging method are used to ensure that the temperature of closed ash discharge of suction and discharge tank transport vehicle meets the requirements. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model is a structural diagram.

[0020] Figure 2 The structure of the reverse type coal gas ash passageway is shown in the figure.

[0021] In the figure: ash tank 1, ash discharge pipe 2, ash collecting pipe 3, reverse type coal gas ash passage 4, storage bin 5, first cooling bin 6, conveying pipe 7, second cooling bin 8, purging pipe 9, vacuum suction and discharge tank transport vehicle 10, discharge port 11, fan 12, pressure reducing valve 13, explosion-proof electric valve 14, on-off valve 15, gas source 16, horizontal pipe section one 41, lifting pipe section 42, horizontal pipe section two 43, descending pipe section 44. DETAILED DESCRIPTION

[0022] In the description of the present application, it is to be understood that the terms "first", "second", etc. are used only for descriptive purpose and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the present application, it is to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The application discloses a kind of blast furnace gas dust removal devices for ironmaking, including ash tank 1, ash tank 1 top is connected with ash collecting pipe 3, ash tank 1 bottom is equipped with ash discharge pipe 2, the bottom of ash discharge pipe 2 is connected with storage bin 5, the side of ash discharge pipe 2 is connected with reverse type coal gas ash passage 4 with height difference, reverse type coal gas ash passage 4 is connected with first cooling bin 6, first cooling bin 6 is connected with second cooling bin 8 by conveying pipe 7, conveying pipe 7 is connected with purging pipe 9, second cooling bin 8 is connected with vacuum suction and discharge tank transport vehicle 10.

[0025] The reverse type coal gas ash passage 4 includes horizontal pipe section one 41, lifting pipe section 42, horizontal pipe section two 43 and descending pipe section 44 connected in sequence, the horizontal pipe section one 41 is connected with the ash discharge pipe 2, the descending pipe section 44 is connected with the first cooling bin 6, and the horizontal pipe section two 43 is higher than the horizontal pipe section one 41 by more than 1.5 m. Because the reverse type coal gas ash passage 4 rises first and then falls, the coal gas ash with small specific gravity and small particles is sucked and discharged, and only the solid with large specific gravity and large volume is left.

[0026] The bottom of the storage bin 5 is provided with a discharge port 11. Because of the different specific gravities, the large solid falls into the storage bin 5, and the large solid is removed from the discharge port 11 by using intermittent time.

[0027] The wall of the first cooling bin 6 and the second cooling bin 8 is wound with a cooling water pipe.

[0028] The first cooling bin 6 and the second cooling bin 8 are provided with a pressure reducing valve 13.

[0029] The conveying pipe 7 is provided with a fan 12.

[0030] The purge pipe 9 is connected with a gas source 16.

[0031] The purge pipe 9 is provided with an explosion-proof electric valve 14.

[0032] The ash discharge pipe 2, the reverse gas ash passage 4, the conveying pipe 7 and the discharge outlet of the second cooling bin 8 are all provided with an on-off valve 15.

[0033] The gas ash is cooled in the first cooling bin 6 after passing through the reverse gas ash passage 4, and then is cooled in the second cooling bin 8 after being purged and passing through the fan, and the temperature of the gas ash entering the suction and discharge tank transport vehicle 10 is below 55 DEG C.

[0034] In order to make the purpose, technical scheme and technical effect of the utility model more clear, the technical scheme in the embodiment of the utility model is clearly and completely described. However, the following described embodiment is only a part of the embodiment of the utility model, not all the embodiments. All other embodiments obtained by the ordinary skilled in the art without making creative labor under the combination of the embodiment in the utility model belong to the protection scope of the utility model.

[0035] Embodiment 1:

[0036] The utility model discloses a kind of iron-making blast furnace gas dust removal devices, including ash tank 1, ash tank 1 top is connected with ash collecting pipe 3, ash tank 1 bottom is equipped with ash discharge pipe 2, the bottom of ash discharge pipe 2 is connected with storage bin 5, storage bin 5 bottom is equipped with discharge port 11. The side of ash discharge pipe 2 is connected with the reverse gas ash passage 4 with height difference, the reverse gas ash passage 4 is connected with first cooling bin 6, the reverse gas ash passage 4 includes horizontal pipe section one 41, lifting pipe section 42, horizontal pipe section two 43, descending pipe section 44 connected in sequence, horizontal pipe section one 41 is connected with ash discharge pipe 2, descending pipe section 44 is connected with first cooling bin 6, horizontal pipe section two 43 is higher than horizontal pipe section one 41 by 1.5m or more.

[0037] First cooling bin 6 is connected with second cooling bin 8 by conveying pipe 7, and the wall of the first cooling bin 6 and the second cooling bin 8 is wound with a cooling water pipe. Circulating water is circulated in the cooling water pipe for cooling.

[0038] A blowing pipe 9 is connected to the conveying pipe 7, and the blowing pipe 9 is connected to a nitrogen gas source 16. The gas pressure is 0.4 MPa. An explosion-proof electric valve 14 is arranged on the blowing pipe 9. A fan 12 is arranged on the conveying pipe 7. The second cooling bin 8 is connected to a vacuum suction and discharge tank transport vehicle 10.

[0039] A pressure reducing valve 13 is arranged on the first cooling bin 6 and the second cooling bin 8.

[0040] The ash discharge pipe 2, the reverse coal gas ash passage 4, the conveying pipe 7 and the discharge outlet of the second cooling bin 8 are all provided with an on-off valve 15. All the valves must be driven by hydraulic cylinders to avoid insufficient opening and closing torque accidents.

[0041] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for iron-making blast furnace gas, characterized by comprising: The ash tank is connected with an ash collecting pipe at the top, and is provided with an ash discharging pipe at the bottom, the bottom of the ash discharging pipe is connected with a storage bin, the side of the ash discharging pipe is connected with a reverse gas ash channel with height difference, the reverse gas ash channel is connected with a first cooling bin, the first cooling bin is connected with a second cooling bin through a conveying pipeline, the conveying pipeline is connected with a blowing pipeline, and the second cooling bin is connected with a vacuum suction and discharge tank transport vehicle.

2. A dust removal device for blast furnace gas in iron making according to claim 1, characterized in that, The reverse gas ash channel comprises horizontal pipe section one, a lifting pipe section, horizontal pipe section two and a descending pipe section connected in sequence, the horizontal pipe section one is connected with the ash discharging pipe, the descending pipe section is connected with the first cooling bin, and the horizontal pipe section two is higher than the horizontal pipe section one by more than 1.5 m.

3. A dust removal device for blast furnace gas in iron making according to claim 1, characterized in that, The bottom of the storage bin is provided with a discharge port.

4. The dust removal device for blast furnace gas in iron making according to claim 1, characterized in that, The bin walls of the first cooling bin and the second cooling bin are both wound with cooling water pipes.

5. A dust removal device for blast furnace gas in iron making according to claim 1, characterized in that, The first cooling bin and the second cooling bin are provided with pressure reducing valves.

6. A dust removal device for blast furnace gas in iron making according to claim 1, characterized in that, The conveying pipeline is provided with a fan.

7. The iron-making blast furnace gas dedusting device according to claim 1, characterized in that, The blowing pipeline is connected with a gas source.

8. A dust removal device for blast furnace gas in iron making according to claim 1, characterized in that, The blowing pipeline is provided with an explosion-proof electric valve.

9. The device for dedusting blast furnace gas according to claim 1, characterized in that, The ash discharging pipe, the reverse gas ash channel, the conveying pipeline and the discharge port of the second cooling bin are all provided with on-off valves.

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