CN217578962U - Hot-blast furnace waste gas semi-recycling device - Google Patents
Hot-blast furnace waste gas semi-recycling device Download PDFInfo
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- CN217578962U CN217578962U CN202220705590.8U CN202220705590U CN217578962U CN 217578962 U CN217578962 U CN 217578962U CN 202220705590 U CN202220705590 U CN 202220705590U CN 217578962 U CN217578962 U CN 217578962U
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Abstract
The utility model belongs to blast furnace ironmaking field, concretely relates to half recycle device of hot-blast furnace waste gas, including 1# hot-blast furnace, 2# hot-blast furnace, 3# hot-blast furnace and 4# hot-blast furnace, wherein: the lower part of the 1# hot blast stove is provided with a 1# cold air valve, a 1# flue valve and two 1# waste gas valves through pipelines, and the upper part of the 1# hot blast stove is provided with a 1# air cut-off valve, a 1# hot air valve and a 1# gas cut-off valve through pipelines. The utility model has the advantages that the tail end of the waste gas main pipe is provided with the stop valve, so that the burnt hot blast stove is filled with waste gas generated when the hot blast stove is changed from the air supply state to the combustion state and removed, and the waste gas is recycled; and then closing the waste gas valve to use cold air for pressurizing, and reducing the blast furnace air pressure and air quantity fluctuation in the pressurizing process, thereby being beneficial to the stability of the furnace condition. The waste gas is effectively utilized, and meanwhile, the environmental noise pollution and the waste gas emission are reduced.
Description
Technical Field
The utility model belongs to blast furnace ironmaking field, concretely relates to half recycle device of hot-blast furnace waste gas.
Background
The current situation is as follows: the two hot blast stoves supply air, the two hot blast stoves burn alternately, and the stove is changed through first transferring the burning furnace into the air blast stove and then transferring the air blast stove into burning, and the burning process of the air blast stove has exhausted waste gas and great environmental and noise pollution. The blast air charging pressure of the combustion furnace needs to be from 0kpa to 430kpa; the blast furnace air pressure is reduced from 430kpa to 410kpa in the process of furnace changing and pressurizing, and the blast furnace air pressure and air quantity are large in fluctuation, so that the furnace condition is not stable.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses a half recycle device of hot-blast furnace waste gas can significantly reduce and trade the undulant and exhaust emissions of stove wind pressure, and the technological transformation is with low costs, and process flow is simple, can promote by a large scale.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a half recycle device of hot-blast furnace waste gas, includes 1# hot-blast furnace, 2# hot-blast furnace, 3# hot-blast furnace and 4# hot-blast furnace, wherein:
the lower part of the 1# hot blast stove is connected with a 1# cold air valve, a 1# flue valve and two 1# waste gas valves through pipelines, and the upper part of the 1# hot blast stove is connected with a 1# air cut-off valve, a 1# hot blast valve and a 1# gas cut-off valve through pipelines;
the lower part of the No. 2 hot blast stove is connected with a No. 2 cold blast valve, a No. 2 flue valve and two No. 2 waste gas valves through pipelines, and the upper part of the No. 2 hot blast stove is connected with a No. 2 air cut-off valve, a No. 2 hot blast valve and a No. 2 coal gas cut-off valve through pipelines;
the lower part of the 3# hot blast stove is connected with a 3# cold air valve, a 3# flue valve and two 3# waste gas valves through pipelines, and the upper part of the 3# hot blast stove is connected with a 3# air cut-off valve, a 3# hot blast valve and a 3# gas cut-off valve through pipelines;
the lower part of the 4# hot blast stove is connected with a 4# cold air valve, a 4# flue valve and two 4# waste gas valves through pipelines, and the upper part of the 4# hot blast stove is connected with a 4# air cut-off valve, a 4# hot blast valve and a 4# gas cut-off valve through pipelines;
the No. 1 cold air valve, the No. 2 cold air valve, the No. 3 cold air valve and the No. 4 cold air valve are communicated through a cold air pipeline,
the No. 1 flue valve, the No. 2 flue valve, the No. 3 flue valve and the No. 4 flue valve are communicated through a flue, and the tail end of the flue is connected with a chimney;
the two No. 1 exhaust valves, the two No. 2 exhaust valves, the two No. 3 exhaust valves and the two No. 4 exhaust valves are connected through an exhaust pipeline;
the No. 1 air cut-off valve, the No. 2 air cut-off valve, the No. 3 air cut-off valve and the No. 4 air cut-off valve are connected through air pipelines;
the No. 1 hot blast valve, the No. 2 hot blast valve, the No. 3 hot blast valve and the No. 4 hot blast valve are communicated through a hot blast passage;
the No. 1 coal gas shut-off valve, the No. 2 coal gas shut-off valve, the No. 3 coal gas shut-off valve and the No. 4 coal gas shut-off valve are communicated through a coal gas pipeline.
Preferably, the tail end of the exhaust gas pipeline is communicated with an exhaust gas discharge port.
Preferably, a blind valve and a silencer are mounted on the exhaust pipeline between the No. 4 exhaust valve and the exhaust gas discharge port.
Preferably, the blind plate valve is a DN600 blind plate valve.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model has the advantages that the tail end of the waste gas main pipe is provided with the stop valve, so that the burnt hot blast stove is filled with waste gas generated when the hot blast stove is changed from the air supply state to the combustion state and removed, and the waste gas is recycled; and then closing the waste gas valve to use cold air for pressurizing, and reducing the blast furnace air pressure and air quantity fluctuation in the pressurizing process, thereby being beneficial to the stability of the furnace condition. The waste gas is effectively utilized, and simultaneously, the environmental noise pollution and the waste gas emission are reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
As shown in figure 1, a half recycle device of hot-blast furnace waste gas, includes 1# hot-blast furnace, 2# hot-blast furnace, 3# hot-blast furnace and 4# hot-blast furnace, wherein:
the lower part of the 1# hot blast stove is connected with a 1# cold air valve, a 1# flue valve and two 1# waste gas valves through pipelines, and the upper part of the 1# hot blast stove is connected with a 1# air cut-off valve, a 1# hot blast valve and a 1# gas cut-off valve through pipelines;
the lower part of the No. 2 hot blast stove is connected with a No. 2 cold blast valve, a No. 2 flue valve and two No. 2 waste gas valves through pipelines, and the upper part of the No. 2 hot blast stove is connected with a No. 2 air cut-off valve, a No. 2 hot blast valve and a No. 2 coal gas cut-off valve through pipelines;
the lower part of the 3# hot blast stove is connected with a 3# cold air valve, a 3# flue valve and two 3# waste gas valves through pipelines, and the upper part of the 3# hot blast stove is connected with a 3# air cut-off valve, a 3# hot blast valve and a 3# gas cut-off valve through pipelines;
the lower part of the 4# hot blast stove is connected with a 4# cold air valve, a 4# flue valve and two 4# waste gas valves through pipelines, and the upper part of the 4# hot blast stove is connected with a 4# air cut-off valve, a 4# hot blast valve and a 4# gas cut-off valve through pipelines;
the No. 1 cold air valve, the No. 2 cold air valve, the No. 3 cold air valve and the No. 4 cold air valve are communicated through a cold air pipeline,
the No. 1 flue valve, the No. 2 flue valve, the No. 3 flue valve and the No. 4 flue valve are communicated through a flue, and the tail end of the flue is connected with a chimney;
two 1# waste gas valves, two 2# waste gas valves, two 3# waste gas valves and two 4# waste gas valves are connected through a waste gas pipeline;
the No. 1 air cut-off valve, the No. 2 air cut-off valve, the No. 3 air cut-off valve and the No. 4 air cut-off valve are connected through air pipelines;
the No. 1 hot blast valve, the No. 2 hot blast valve, the No. 3 hot blast valve and the No. 4 hot blast valve are communicated through a hot blast passage;
the No. 1 coal gas shut-off valve, the No. 2 coal gas shut-off valve, the No. 3 coal gas shut-off valve and the No. 4 coal gas shut-off valve are communicated through a coal gas pipeline.
The tail end of the waste gas pipeline is communicated with a waste gas discharge port.
And a blind plate valve and a silencer are arranged between the 4# waste gas valve and the waste gas discharge port on the waste gas pipeline.
The blind plate valve is a DN600 blind plate valve.
When in use: taking four hot blast stoves as an example, adopting cross parallel stove exchange, the blast furnace air pressure is 430kpa; the No. 2 and No. 4 hot blast stoves are in an air supply state, the No. 1 and No. 3 hot blast stoves are in a burning state, the No. 3 hot blast stove needs to transfer an air state after being burnt, and the No. 4 hot blast stove is removed and converted into a combustion furnace. The system can effectively reduce the exhaust emission and the environmental pollution, and simultaneously the pressure fluctuation of the blast furnace is small, thereby being beneficial to the stability of the blast furnace air pressure and the air quantity and being beneficial to the smooth operation of the furnace condition.
(1) Stopping burning the 3# hot blast stove, closing a 3# gas cut-off valve, a 3# air cut-off valve, a 3# combustion valve and a 3# flue valve;
(2) Opening two No. 3 waste gas valves of a No. 3 hot blast stove, and closing a waste gas main pipe DN600 blind plate valve; removing the 4# air supply furnace, closing a cold air valve and a hot air valve of the 4# hot air furnace, opening two 4# waste gas valves, and charging waste gas into the 3# hot air furnace; the pressure in the 3# hot blast stove is increased from 0kpa to 215kpa (half of the wind pressure), the pressure in the 4# hot blast stove is reduced from 430kpa to 215kpa (half of the wind pressure), and the pressures of the 3# hot blast stove and the 4# hot blast stove are equal at the moment;
(3) And (3) closing two 3# waste gas valves of the 3# hot blast stove, opening a waste gas main pipe DN600 blind plate valve, reducing the pressure of the 4# hot blast stove to 0kpa from 215kpa, and exhausting the waste gas of the 4# hot blast stove.
(4) Opening a cold air equalizing valve of a 3# hot blast stove for pressurizing, and pressurizing the 3# hot blast stove from 215kpa to 430kpa, so that the fluctuation of air pressure is reduced (when the technology is not used for changing the stove, the pressure in the 3# hot blast stove needs to be pressurized from 0kpa to 430 kpa); opening the cold air valve, opening the hot air valve to supply air, and then supplying air in the No. 2 and No. 3; and 4, converting to combustion operation to finish furnace replacement.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a half recycle device of hot-blast furnace waste gas, includes 1# hot-blast furnace, 2# hot-blast furnace, 3# hot-blast furnace and 4# hot-blast furnace, its characterized in that, wherein:
the lower part of the 1# hot blast stove is connected with a 1# cold air valve, a 1# flue valve and two 1# waste gas valves through pipelines, and the upper part of the 1# hot blast stove is connected with a 1# air cut-off valve, a 1# hot blast valve and a 1# gas cut-off valve through pipelines;
the lower part of the No. 2 hot blast stove is connected with a No. 2 cold air valve, a No. 2 flue valve and two No. 2 waste gas valves through pipelines, and the upper part of the No. 2 hot blast stove is connected with a No. 2 air cut-off valve, a No. 2 hot blast valve and a No. 2 coal gas cut-off valve through pipelines;
the lower part of the 3# hot blast stove is connected with a 3# cold air valve, a 3# flue valve and two 3# waste gas valves through pipelines, and the upper part of the 3# hot blast stove is connected with a 3# air cut-off valve, a 3# hot blast valve and a 3# gas cut-off valve through pipelines;
the lower part of the 4# hot blast stove is connected with a 4# cold air valve, a 4# flue valve and two 4# waste gas valves through pipelines, and the upper part of the 4# hot blast stove is connected with a 4# air cut-off valve, a 4# hot blast valve and a 4# gas cut-off valve through pipelines;
the No. 1 cold air valve, the No. 2 cold air valve, the No. 3 cold air valve and the No. 4 cold air valve are communicated through a cold air pipeline,
the 1# flue valve, the 2# flue valve, the 3# flue valve and the 4# flue valve are communicated through a flue, and the tail end of the flue is connected with a chimney;
the two No. 1 exhaust valves, the two No. 2 exhaust valves, the two No. 3 exhaust valves and the two No. 4 exhaust valves are connected through an exhaust pipeline;
the No. 1 air cut-off valve, the No. 2 air cut-off valve, the No. 3 air cut-off valve and the No. 4 air cut-off valve are connected through air pipelines;
the No. 1 hot blast valve, the No. 2 hot blast valve, the No. 3 hot blast valve and the No. 4 hot blast valve are communicated through a hot blast passage;
the No. 1 gas cut-off valve, the No. 2 gas cut-off valve, the No. 3 gas cut-off valve and the No. 4 gas cut-off valve are communicated through a gas pipeline.
2. The half-recycling device for the exhaust gas of the hot blast stove according to claim 1, wherein the tail end of the exhaust gas pipeline is communicated with an exhaust gas discharge port.
3. The half-recycling device for the exhaust gas of the hot blast stove according to claim 2, wherein a blind valve and a silencer are installed between the No. 4 exhaust gas valve and the exhaust gas discharge port on the exhaust gas pipeline.
4. The half-recycling device for the exhaust gas of the hot blast stove according to claim 3, wherein the blind plate valve is DN600 blind plate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220705590.8U CN217578962U (en) | 2022-03-29 | 2022-03-29 | Hot-blast furnace waste gas semi-recycling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220705590.8U CN217578962U (en) | 2022-03-29 | 2022-03-29 | Hot-blast furnace waste gas semi-recycling device |
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| CN217578962U true CN217578962U (en) | 2022-10-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115838843A (en) * | 2023-02-20 | 2023-03-24 | 山西建龙实业有限公司 | Device and method for recovering residual hot air of hot blast stove |
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2022
- 2022-03-29 CN CN202220705590.8U patent/CN217578962U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115838843A (en) * | 2023-02-20 | 2023-03-24 | 山西建龙实业有限公司 | Device and method for recovering residual hot air of hot blast stove |
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