CN112344749A - Dust removal method of VD furnace under normal pressure - Google Patents
Dust removal method of VD furnace under normal pressure Download PDFInfo
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- CN112344749A CN112344749A CN202011046559.XA CN202011046559A CN112344749A CN 112344749 A CN112344749 A CN 112344749A CN 202011046559 A CN202011046559 A CN 202011046559A CN 112344749 A CN112344749 A CN 112344749A
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- vacuum
- dust removal
- pipeline
- switching device
- vacuum tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a dust removal method of a VD furnace under normal pressure, which is characterized in that a tee joint is additionally arranged on a vacuum pipeline, and a vacuum pipeline switching device and a dust removal pipeline switching device are used for connecting and sealing a vacuum tank with a vacuum pump system pipeline during vacuum treatment of molten steel, and connecting with a workshop ventilation dust removal system pipeline after vacuum is broken again for dust removal operation. Through the position change of the pipeline switching device and the auxiliary equipment, the smoke generated by the wire feeding can be completely pumped into a workshop ventilation and dust removal system. The invention solves the problem of environmental protection, improves the production efficiency and increases the income.
Description
Technical Field
The invention relates to a dust removal method of a VD furnace under normal pressure.
Background
After vacuum breaking, the VD furnace needs to carry out subsequent treatment such as wire feeding and the like on the molten steel under normal pressure, and a large amount of smoke dust is generated in the process.
At present, the best dust removal method of the VD furnace under normal pressure is to add a set of atmospheric tank cover vehicle system on the track of the vacuum tank cover vehicle, and the double-station VD needs to add a set of atmospheric tank cover vehicle system at both ends of the track respectively, and when the interface of the ventilation dust removal pipeline on the atmospheric cover is in butt joint with the dust removal pipeline in a workshop, the dust removal operation can be carried out, and the air volume requirement is large and the dust removal effect is poor. Simultaneously, the atmosphere cover car that adds compares the former VD device and has additionally taken the operating platform position as big as vacuum tank cover car standby position, has increased great investment but can not bring any extra income, and most mills do not carry out the secondary under the wire feeding state and remove dust, cause operational environment extremely abominable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a dust removal method of a VD furnace under normal pressure, and thoroughly solves the dust removal problem of a VD feeding state.
In order to solve the technical problem, the invention is realized as follows:
the dust removal method of the VD furnace under the normal pressure comprises a wire feeding machine and a vacuum tank cover vehicle, wherein the wire feeding machine feeds wires into a molten steel tank below the vacuum tank cover vehicle, and the dust removal method is characterized in that: the vacuum tank is connected and sealed with a vacuum pump system pipeline when molten steel is subjected to vacuum treatment through the vacuum pipeline switching device and the dust removal pipeline switching device, and is connected with a workshop ventilation dust removal system pipeline after vacuum is broken through re-pressing and dust removal operation is carried out; through the position change of the pipeline switching device and the auxiliary equipment, the smoke generated by the wire feeding can be completely pumped into a workshop ventilation and dust removal system.
The dust removal method of the VD furnace under normal pressure is characterized by comprising the following steps: the system comprises a dust removal pipeline switching device, a first vacuum tank, a second vacuum tank, a vacuum pipeline switching device, a tee joint, a vacuum pump system and a workshop ventilation and dust removal system pipeline;
the vacuum pipeline switching device is used for connection switching among the first vacuum tank, the second vacuum tank and the vacuum pump system, and the dust removal pipeline switching device is used for connection switching among the first vacuum tank, the second vacuum tank and the workshop ventilation dust removal system pipeline and is connected into the vacuum pipeline system through a tee joint.
The dust removal method of the VD furnace under normal pressure is characterized by comprising the following steps: the first pipeline is provided with a first outlet pipe, a second outlet pipe and a second pipeline connected with the second vacuum tank, and the second pipeline is provided with a third outlet pipe, a fourth outlet pipe, a pipeline connected with a workshop ventilation and dust removal system and a pipeline connected with a vacuum pump system;
the dust removal pipeline switching device and the vacuum pipeline switching device are respectively a trolley which is provided with a driving walking device, can move on a track and is provided with a 180-degree liftable elbow, and the dust removal pipeline switching device and the vacuum pipeline switching device are arranged in opposite positions.
The dust removal method of the VD furnace under normal pressure is characterized by comprising the following steps: the dust removal pipeline switching device comprises a dust removal pipeline switching device, a vacuum pipeline switching device and an outlet pipe, wherein the dust removal pipeline switching device and the vacuum pipeline switching device are connected with each other through the outlet pipe, the vacuum pipeline switching device is connected with the vacuum tank through the outlet pipe, the two blind plates are in a working state of a sealed pipeline, and the other two blind plates are in a standby state.
The dust removal method of the VD furnace under normal pressure is characterized by comprising the following steps: the wire feeding machine is arranged at the upper part of the vacuum tank cover vehicle, a wire feeding hole is formed in the tank cover of the vacuum tank cover vehicle, and the wire feeding hole is provided with the vacuum sealing valve; and when the molten steel is subjected to vacuum treatment, the vacuum sealing valve is closed, the vacuum sealing valve is opened after the vacuum is broken, and the liftable conduit extends into or out of the vacuum tank cover through the vacuum sealing valve.
The dust removal method of the VD furnace under normal pressure is characterized by comprising the following steps: when the vacuum pipeline switching device moves to the upper part of the pipeline connected with the vacuum pump system and the third outlet pipe, the vacuum pump system is connected with the second vacuum tank, at the moment, the dust removal pipeline switching device is positioned at the upper part of the second outlet pipe and the pipeline connected with the workshop ventilation and dust removal system, and the workshop ventilation and dust removal system is connected with the first vacuum tank and conducts ventilation and dust removal operation on the first vacuum tank; on the contrary, when the vacuum pipeline switching device moves to the first outlet pipe and is connected with the upper part of the pipeline of the vacuum pump system, the vacuum pump system is connected with the first vacuum tank, at the moment, the dust removal pipeline switching device is positioned on the upper part of the pipeline for connecting the workshop ventilation and dust removal system and the fourth outlet pipe, and the workshop ventilation and dust removal system is connected with the second vacuum tank and conducts ventilation and dust removal operation on the second vacuum tank.
The dust removal method of the VD furnace under normal pressure is characterized by comprising the following steps: the sealing ring is arranged on the flange of the outlet pipe corresponding to the blind plate.
The invention has the beneficial effects that: the dust removal method has the advantages of simple structure, reliable work, simple and convenient operation, energy conservation, low one-time investment and the like, and the most important is that the dust removal method improves the production efficiency and increases the income while solving the environmental protection problem.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic top view of the vacuum pump system of the present application coupled to a second vacuum tank.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a schematic view of fig. 2 in the direction of N.
FIG. 4 is a schematic top view of the vacuum pump system of the present application coupled to a first vacuum tank.
Detailed Description
As shown in fig. 1-4: the dust removal method of the VD furnace under the normal pressure comprises a wire feeding machine and a vacuum tank cover vehicle, wherein the wire feeding machine feeds wires into a molten steel tank below the vacuum tank cover vehicle, a tee joint is additionally arranged on a vacuum pipeline, and the vacuum tank is connected and sealed with a vacuum pump system pipeline when the molten steel is subjected to vacuum treatment through a vacuum pipeline switching device and a dust removal pipeline switching device, and is connected with a workshop ventilation dust removal system pipeline after vacuum is broken again for dust removal operation; through the position change of the pipeline switching device and the auxiliary equipment, the smoke generated by the wire feeding can be completely pumped into a workshop ventilation and dust removal system.
Further, the device comprises a dust removal pipeline switching device 2, a first pipeline 51 connected with the first vacuum tank, a second pipeline 52 connected with the second vacuum tank, a vacuum pipeline switching device 6, a tee joint 7, a vacuum pump system pipeline 31 and a workshop ventilation and dust removal system pipeline 21;
the vacuum pipeline switching device 6 is used for connection switching among the first vacuum tank, the second vacuum tank and the vacuum pump system, and the dust removal pipeline switching device is used for connection switching among the first vacuum tank, the second vacuum tank and the workshop ventilation dust removal system pipeline and is connected into the vacuum pipeline system through a tee joint.
Further, the device comprises a first pipeline 51 connected with the first vacuum tank, wherein the first pipeline is provided with a first outlet pipe 11, a second outlet pipe 12 and a second pipeline 52 connected with the second vacuum tank, the second pipeline is provided with a third outlet pipe 13, a fourth outlet pipe 14, a pipeline 21 connected with a workshop ventilation and dust removal system and a pipeline 31 connected with a vacuum pump system;
the dust removal pipeline switching device and the vacuum pipeline switching device are respectively a trolley which is provided with a driving walking device, can move on a track and is provided with a 180-degree liftable elbow, and the dust removal pipeline switching device and the vacuum pipeline switching device are arranged in opposite positions;
when the vacuum pipeline switching device moves to the upper part of the pipeline connected with the vacuum pump system and the third outlet pipe, the vacuum pump system is connected with the second vacuum tank, at the moment, the dust removal pipeline switching device is positioned at the upper part of the second outlet pipe and the pipeline connected with the workshop ventilation and dust removal system, and the workshop ventilation and dust removal system is connected with the first vacuum tank and conducts ventilation and dust removal operation on the first vacuum tank; on the contrary, when the vacuum pipeline switching device moves to the first outlet pipe and is connected with the upper part of the pipeline of the vacuum pump system, the vacuum pump system is connected with the first vacuum tank, at the moment, the dust removal pipeline switching device is positioned on the upper part of the pipeline for connecting the workshop ventilation and dust removal system and the fourth outlet pipe, and the workshop ventilation and dust removal system is connected with the second vacuum tank and conducts ventilation and dust removal operation on the second vacuum tank.
Further, the dust removal device comprises four blind plates 1, one blind plate is hung at each of two ends of the dust removal pipeline switching device and the vacuum pipeline switching device and used for sealing an outlet pipe of the switching device in a non-working state and connected with the vacuum tank, the two blind plates are in a working state of the sealed pipeline, and the other two blind plates are in a standby state.
Furthermore, the device also comprises a sealing ring 8, and the flange of the outlet pipe corresponding to the blind plate is provided with the sealing ring.
Further, the wire feeding machine is arranged at the upper part of the vacuum tank cover vehicle, a wire feeding hole is formed in the vacuum tank cover, and the vacuum sealing valve is arranged at the wire feeding hole; and when the molten steel is subjected to vacuum treatment, the vacuum sealing valve is closed, the vacuum sealing valve is opened after the vacuum is broken, and the liftable conduit extends into or out of the vacuum tank cover through the vacuum sealing valve.
Aiming at each double-station VD furnace, two sets of vacuum tank cover vehicles 4 are configured, so that a first vacuum tank and the first vacuum tank cover vehicle form a set of closed space for storing steel ladles, and a second vacuum tank and the second vacuum tank cover vehicle form another set of closed space for storing the steel ladles; the vacuum pump system alternately pumps air for the two closed spaces, so that the transfer speed of molten steel between working procedures is accelerated, and the production efficiency is improved. Compared with the conventional dust removal method, the wire feeding machine is arranged on the vacuum tank cover vehicle 4, so that the tank cover can be lowered even to be in contact with the opening of the vacuum tank for wire feeding operation, all smoke generated by wire feeding can be pumped into a workshop ventilation dust removal system, and the requirement on ventilation quantity is very small due to less wild wind entering the system.
The VD refining device is divided into a single station and double stations, the single station VD is only provided with 1 vacuum tank, the double stations VD are provided with two vacuum tanks and share one set of vacuum pump system, and the two vacuum tanks alternately carry out vacuum treatment on molten steel. Correspondingly, the invention is also divided into a single-station system and a double-station system; the attached figure is a double-station system, and the single-station system only needs one pipeline switching device, so that the vacuum tank is connected and sealed with a vacuum pump system pipeline when molten steel is subjected to vacuum treatment, and is connected and sealed with a workshop ventilation and dust removal system pipeline after being broken empty.
Of course, those skilled in the art will recognize that the above-described embodiments are illustrative only, and not limiting, and that changes and modifications may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. The dust removal method of the VD furnace under the normal pressure comprises a wire feeding machine and a vacuum tank cover vehicle, wherein the wire feeding machine feeds wires into a molten steel tank below the vacuum tank cover vehicle, and the dust removal method is characterized in that: the vacuum tank is connected and sealed with a vacuum pump system pipeline when molten steel is subjected to vacuum treatment through the vacuum pipeline switching device and the dust removal pipeline switching device, and is connected with a workshop ventilation dust removal system pipeline after vacuum is broken through re-pressing and dust removal operation is carried out; through the position change of the pipeline switching device and the auxiliary equipment, the smoke generated by the wire feeding can be completely pumped into a workshop ventilation and dust removal system.
2. The dust removal method for the VD furnace under the normal pressure according to claim 1, is characterized in that: the system comprises a dust removal pipeline switching device, a first vacuum tank, a second vacuum tank, a vacuum pipeline switching device, a tee joint, a vacuum pump system and a workshop ventilation and dust removal system pipeline;
the vacuum pipeline switching device is used for connection switching among the first vacuum tank, the second vacuum tank and the vacuum pump system, and the dust removal pipeline switching device is used for connection switching among the first vacuum tank, the second vacuum tank and the workshop ventilation dust removal system pipeline and is connected into the vacuum pipeline system through a tee joint.
3. The dust removal method for the VD furnace under the normal pressure according to claim 2, is characterized in that: the first pipeline is provided with a first outlet pipe, a second outlet pipe and a second pipeline connected with the second vacuum tank, and the second pipeline is provided with a third outlet pipe, a fourth outlet pipe, a pipeline connected with a workshop ventilation and dust removal system and a pipeline connected with a vacuum pump system;
the dust removal pipeline switching device and the vacuum pipeline switching device are respectively a trolley which is provided with a driving walking device, can move on a track and is provided with a 180-degree liftable elbow, and the dust removal pipeline switching device and the vacuum pipeline switching device are arranged in opposite positions.
4. The dust removal method for the VD furnace under the normal pressure according to claim 3, is characterized in that: the dust removal pipeline switching device comprises a dust removal pipeline switching device, a vacuum pipeline switching device and an outlet pipe, wherein the dust removal pipeline switching device and the vacuum pipeline switching device are connected with each other through the outlet pipe, the vacuum pipeline switching device is connected with the vacuum tank through the outlet pipe, the two blind plates are in a working state of a sealed pipeline, and the other two blind plates are in a standby state.
5. The dust removal method for the VD furnace under the normal pressure according to claim 1, is characterized in that: the wire feeding machine is arranged at the upper part of the vacuum tank cover vehicle, a wire feeding hole is formed in the tank cover of the vacuum tank cover vehicle, and the wire feeding hole is provided with the vacuum sealing valve; and when the molten steel is subjected to vacuum treatment, the vacuum sealing valve is closed, the vacuum sealing valve is opened after the vacuum is broken, and the liftable conduit extends into or out of the vacuum tank cover through the vacuum sealing valve.
6. The dust removal method for the VD furnace under the normal pressure according to claim 2, is characterized in that: when the vacuum pipeline switching device moves to the upper part of the pipeline connected with the vacuum pump system and the third outlet pipe, the vacuum pump system is connected with the second vacuum tank, at the moment, the dust removal pipeline switching device is positioned at the upper part of the second outlet pipe and the pipeline connected with the workshop ventilation and dust removal system, and the workshop ventilation and dust removal system is connected with the first vacuum tank and conducts ventilation and dust removal operation on the first vacuum tank; on the contrary, when the vacuum pipeline switching device moves to the first outlet pipe and is connected with the upper part of the pipeline of the vacuum pump system, the vacuum pump system is connected with the first vacuum tank, at the moment, the dust removal pipeline switching device is positioned on the upper part of the pipeline for connecting the workshop ventilation and dust removal system and the fourth outlet pipe, and the workshop ventilation and dust removal system is connected with the second vacuum tank and conducts ventilation and dust removal operation on the second vacuum tank.
7. The dust removal method for the VD furnace under normal pressure according to claim 6, is characterized in that: the sealing ring is arranged on the flange of the outlet pipe corresponding to the blind plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011046559.XA CN112344749A (en) | 2020-09-29 | 2020-09-29 | Dust removal method of VD furnace under normal pressure |
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| CN202011046559.XA CN112344749A (en) | 2020-09-29 | 2020-09-29 | Dust removal method of VD furnace under normal pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807519A (en) * | 2022-06-14 | 2022-07-29 | 浙江杭真能源科技股份有限公司 | Vacuum refining furnace with dust removal function |
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| CN110273048A (en) * | 2019-06-11 | 2019-09-24 | 首钢京唐钢铁联合有限责任公司 | Online processing position wire feeding device and method for VD furnace |
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2020
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1511961A (en) * | 2002-12-30 | 2004-07-14 | 西安重型机械研究所 | Double tank immobile interface system of vacuum refining furnace |
| WO2013161014A1 (en) * | 2012-04-25 | 2013-10-31 | 新日鐵住金株式会社 | Secondary refining equipment and secondary refining method for molten steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114807519A (en) * | 2022-06-14 | 2022-07-29 | 浙江杭真能源科技股份有限公司 | Vacuum refining furnace with dust removal function |
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