CN104232847A - RH refining furnace vacuum pumping system and using method thereof - Google Patents
RH refining furnace vacuum pumping system and using method thereof Download PDFInfo
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- CN104232847A CN104232847A CN201410531881.XA CN201410531881A CN104232847A CN 104232847 A CN104232847 A CN 104232847A CN 201410531881 A CN201410531881 A CN 201410531881A CN 104232847 A CN104232847 A CN 104232847A
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Abstract
The invention relates to an RH refining furnace vacuum pumping system and a using method thereof. A steam pump group is combined with a liquid ring pump; the liquid ring pump and a fifth stage steam pump are arranged in a parallel mode; a waste gas treatment device is arranged in front of an air inlet of the liquid ring pump; a third stage condenser is connected with a steam and water separation device. According to the RH refining furnace vacuum pumping system and the using method thereof, the structure is simple, the dependence of the operation of an RH refining furnace on the steam can be reduced, and the molten steel treatment cost can be reduced; the gas pumped through the liquid ring pump can be purified due to the waste gas treatment device, the working environment is good, the stability is high, the working efficiency can be improved, and the service life can be extended; the system exhaust efficiency is high due to the steam and water separation device and accordingly the working efficiency of the RH refining furnace vacuum pumping system can be further improved.
Description
Technical field
The present invention relates to RH refining furnace vacuum refining process field, be specifically related to a kind of RH refining furnace vacuum-pumping system and using method thereof.
Background technology
Along with expanding economy, the demand of user to rolling shapes is increasing, also day by day improves the requirement of steel product quality.RH vacuum refining process came out more than 50 year so far time from nineteen fifty-nine, had become and had widened steel quality, promoted the effective means of steel product quality.
Enter 21 century, domestic many steel mills establish the RH equipment for vacuum refining of different equipment pattern and process capacity in succession.Mainly vapor jet pump in the selection of air-bleed system, this air-bleed system mainly to utilize from converter waste heat steam or outer net Boiler Steam as evacuation medium, reaches the vacuum tightness needed for vacuum-treat by the vapour pump of different compression ratio of connecting.This bleeds, and dummy device structure is simple, maintenance cost is low, but needs to consume a large amount of steam mediums, and energy consumption is high.For under steam comparatively shortage situation, the suitability of this system is just restricted.Especially, along with the arrival in national steel industry severe winter, cost efficiency becomes the main production and operation target of iron and steel enterprise.Find one RH refining furnace vacuum-pumping system more flexibly, the dependency degree reduced for steam in RH refining furnace treating processes becomes the task of top priority.
Therefore be necessary to design a kind of RH refining furnace vacuum-pumping system, to overcome the problems referred to above.
Summary of the invention
The object of the invention is to the defect overcoming prior art, a kind of RH refining furnace vacuum-pumping system and using method thereof are provided, the dependency degree of RH refining furnace operation to steam can be reduced, reduce the effect of process molten steel cost.
The present invention is achieved in that
The invention provides a kind of RH refining furnace vacuum-pumping system, the vacuum main valve comprising vacuum chamber system, pump-line and be arranged on described pump-line.Described pump-line connects the 1st grade of vapour pump, the 2nd grade of vapour pump, 3rd level vapour pump, the 1st grade of condenser, 4a level vapour pump in parallel and 4b level vapour pump, the 2nd grade of condenser, 5a level vapour pump in parallel and 5b level vapour pump, 3rd level condenser successively, and described 3rd level condenser is connected with water separator; The exit end of described 2nd grade of condenser is also connected with rotary pump with liquid ring, and described 2nd grade is provided with emission-control equipment between condenser and rotary pump with liquid ring; Between described 4b level vapour pump and the 1st grade of condenser, between 5a level vapour pump and the 2nd grade of condenser, between 5b level vapour pump and the 2nd grade of condenser, the 2nd grade be equipped with trip valve between condenser and rotary pump with liquid ring.
Further, described emission-control equipment is sack cleaner.
Further, described water separator is baffle plate type steam separator.
Further, described rotary pump with liquid ring adopts water-lute or oil seal.
The present invention also provides the using method of above-mentioned RH refining furnace vacuum-pumping system, comprises the following steps:
S1: when vacuum-treat starts, opens vacuum main valve; When steam in production process is sufficient, starts 5a level vapour pump and/or 5b level vapour pump while starting rotary pump with liquid ring, the vacuum tightness of vacuum chamber system is evacuated to about 35Kpa; When steam in production process is not enough, stop using 5a level vapour pump and 5b level vapour pump, start rotary pump with liquid ring, the vacuum tightness of vacuum chamber system be evacuated to about 35Kpa.
S2: start 4a level vapour pump and the vacuum tightness of vacuum chamber system is evacuated to 6 ~ 8Kpa by 4b level vapour pump.
S3: start 3rd level vapour pump, the vacuum tightness of vacuum chamber system is evacuated to below 2.5Kpa.
S4: start the 2nd grade of vapour pump, the vacuum tightness of vacuum chamber system is evacuated to below 500Pa.
S5: start the 1st grade of vapour pump, the vacuum tightness of vacuum chamber system is evacuated to below 67Pa.
The present invention has following beneficial effect: adopt the 5th grade of mode that vapour pump is in parallel with rotary pump with liquid ring, and rotary pump with liquid ring can use raising pumping speed with the 5th grade of vapour pump simultaneously, shortens pumpdown time; Also can be used alone when the 5th grade of vapour pump does not use, while ensureing pumping speed, reduce the steam consumption of RH refining furnace vacuum-pumping system.Structure of the present invention is simple, can reduce the dependency degree of RH refining furnace operation to steam, reduce the effect of process molten steel cost.By arranging emission-control equipment before rotary pump with liquid ring inlet mouth, can purify body that rotary pump with liquid ring is bled, Working environment is better and stability is high, can increase work efficiency and work-ing life.By connecting water separator at 3rd level condenser, system exhaust efficiency is higher, can improve the working efficiency of RH refining furnace vacuum-pumping system further.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the RH refining furnace vacuum-pumping system that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
As Fig. 1, the embodiment of the present invention provides a kind of RH refining furnace vacuum-pumping system, the vacuum main valve 2 comprising vacuum chamber system 1, pump-line 16 and be arranged on described pump-line 16.Described pump-line 16 connects the 1st grade of vapour pump 3, the 2nd grade of vapour pump 4,3rd level vapour pump 5, the 1st grade of condenser 6,4a level vapour pump 7 in parallel and 4b level vapour pump the 8, the 2nd grade of condenser 9,5a level vapour pump 10 in parallel and 5b level vapour pump 11,3rd level condenser 12 successively, and described 3rd level condenser 12 is connected with water separator 13; The exit end of described 2nd grade of condenser 9 is also connected with rotary pump with liquid ring 15, and described 2nd grade is provided with emission-control equipment 14 between condenser 9 and rotary pump with liquid ring 15; Between described 4b level vapour pump 8 and the 1st grade of condenser 6, between 5a level vapour pump 10 and the 2nd grade of condenser 9, between 5b level vapour pump 11 and the 2nd grade of condenser 9, the 2nd grade be equipped with trip valve between condenser 9 and rotary pump with liquid ring 15.Wherein: described emission-control equipment 14 is preferably sack cleaner.Described water separator 13 is preferably baffle plate type steam separator.Described rotary pump with liquid ring 15 is preferably and adopts water-lute or oil seal.
The embodiment of the present invention also provides the using method of above-mentioned RH refining furnace vacuum-pumping system, and step is as follows:
(1) when steam in production process is not enough, stop using 5a level vapour pump 10 and 5b level vapour pump 11, and rotary pump with liquid ring 15 is used alone.
When vacuum-treat starts, open vacuum main valve 2, start rotary pump with liquid ring 15 and the vacuum tightness of vacuum chamber system 1 is evacuated to about 35Kpa; Then 4a level vapour pump 7 is started and the vacuum tightness of vacuum chamber system 1 is evacuated to 6 ~ 8Kpa by 4b level vapour pump 8; Open 3rd level vapour pump 5, the vacuum tightness of vacuum chamber system 1 is evacuated to below 2.5Kpa; Open the 2nd grade of vapour pump 4, the vacuum tightness of vacuum chamber system 1 is evacuated to below 500Pa; Finally open the 1st grade of vapour pump 3, the vacuum tightness of vacuum chamber system 1 is evacuated to below 67Pa.
Adopt in this way, about 40% can be consumed by steam saving.
(2) when production process steam is sufficient, rotary pump with liquid ring 15 and the 5th grade of vapo(u)r blasting parallel connection of pumps are used.
When vacuum-treat starts, open vacuum main valve 2, start 5a level vapour pump 10 or 5b level vapour pump 11 while starting rotary pump with liquid ring 15, or three starts, and the vacuum tightness of vacuum chamber system 1 is evacuated to about 35Kpa simultaneously; Then 4a level vapour pump 7 is started and the vacuum tightness of vacuum chamber system 1 is evacuated to 6 ~ 8Kpa by 4b level vapour pump 8; Open 3rd level vapour pump 5, the vacuum tightness of vacuum chamber system 1 is evacuated to below 2.5Kpa; Open the 2nd grade of vapour pump 4, the vacuum tightness of vacuum chamber system 1 is evacuated to below 500Pa; Finally open the 1st grade of vapour pump 3, the vacuum tightness of vacuum chamber system 1 is evacuated to below 67Pa.
Adopt in this way, can shorten pumpdown time about 10%, steam saving consumes about 25% simultaneously.
The service condition of the RH refining furnace vacuum-pumping system provided for the present embodiment above when extracting highest attainable vacuum, this vacuum-pumping system also can by starting and closing the requirement that corresponding vapour pump carrys out satisfied different vacuum tightness, use flexibility and reliability, steam saving consumption, can increase work efficiency simultaneously.
The embodiment of the present invention has following beneficial effect: adopt the 5th grade of mode that vapour pump is in parallel with rotary pump with liquid ring 15, and rotary pump with liquid ring 15 can use to improve pumping speed with the 5th grade of vapour pump simultaneously, shortens pumpdown time; Also can be used alone when the 5th grade of vapour pump does not use, while ensureing pumping speed, reduce the steam consumption of RH refining furnace vacuum-pumping system.Structure of the present invention is simple, can reduce the dependency degree of RH refining furnace operation to steam, reduce the effect of process molten steel cost.By arranging emission-control equipment 14 before rotary pump with liquid ring 15 inlet mouth, can purify rotary pump with liquid ring 15 body of bleeding, Working environment better and stability is high, can be increased work efficiency and work-ing life.By connecting water separator 13 at 3rd level condenser 12, system exhaust efficiency is higher, can improve the working efficiency of RH refining furnace vacuum-pumping system further.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a RH refining furnace vacuum-pumping system, comprise vacuum chamber system (1), pump-line (16) and the vacuum main valve (2) be arranged on described pump-line (16), it is characterized in that: described pump-line (16) connects the 1st grade of vapour pump (3) successively, 2nd grade of vapour pump (4), 3rd level vapour pump (5), 1st grade of condenser (6), 4a level vapour pump (7) in parallel and 4b level vapour pump (8), 2nd grade of condenser (9), 5a level vapour pump (10) in parallel and 5b level vapour pump (11), 3rd level condenser (12), described 3rd level condenser (12) is connected with water separator (13), the exit end of described 2nd grade of condenser (9) is also connected with rotary pump with liquid ring (15), is provided with emission-control equipment (14) between described 2nd grade of condenser (9) and rotary pump with liquid ring (15), between described 4b level vapour pump (8) and the 1st grade of condenser (6), between 5a level vapour pump (10) and the 2nd grade of condenser (9), between 5b level vapour pump (11) and the 2nd grade of condenser (9), between the 2nd grade of condenser (9) and rotary pump with liquid ring (15), be equipped with trip valve.
2. RH refining furnace vacuum-pumping system according to claim 1, is characterized in that: described emission-control equipment (14) is sack cleaner.
3. RH refining furnace vacuum-pumping system according to claim 1, is characterized in that: described water separator (13) is baffle plate type steam separator.
4. RH refining furnace vacuum-pumping system according to claim 1, is characterized in that: described rotary pump with liquid ring (15) adopts water-lute or oil seal.
5. the using method of RH refining furnace vacuum-pumping system according to any one of claim 1 to 4, is characterized in that, comprise the following steps:
S1: when vacuum-treat starts, opens vacuum main valve (2); When steam in production process is sufficient, starts 5a level vapour pump (10) and/or 5b level vapour pump (11) while starting rotary pump with liquid ring (15), the vacuum tightness of vacuum chamber system (1) is evacuated to about 35Kpa; When steam in production process is not enough, stop using 5a level vapour pump (10) and 5b level vapour pump (11), start rotary pump with liquid ring (15), the vacuum tightness of vacuum chamber system (1) be evacuated to about 35Kpa;
S2: start 4a level vapour pump (7) and the vacuum tightness of vacuum chamber system (1) is evacuated to 6 ~ 8Kpa by 4b level vapour pump (8);
S3: start 3rd level vapour pump (5), the vacuum tightness of vacuum chamber system (1) is evacuated to below 2.5Kpa;
S4: start the 2nd grade of vapour pump (4), the vacuum tightness of vacuum chamber system (1) is evacuated to below 500Pa;
S5: start the 1st grade of vapour pump (3), the vacuum tightness of vacuum chamber system (1) is evacuated to below 67Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531881.XA CN104232847B (en) | 2014-10-11 | RH refining furnace vacuum-pumping system and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531881.XA CN104232847B (en) | 2014-10-11 | RH refining furnace vacuum-pumping system and using method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN104232847A true CN104232847A (en) | 2014-12-24 |
| CN104232847B CN104232847B (en) | 2017-01-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104946856A (en) * | 2015-07-20 | 2015-09-30 | 中国重型机械研究院股份公司 | Multi-stage water vapor injecting pump arrangement mode |
| CN107964576A (en) * | 2017-11-13 | 2018-04-27 | 浙江杭真能源科技股份有限公司 | A kind of vacuum pump system and its method of work for VOD refining furnaces |
| CN108424996A (en) * | 2018-04-04 | 2018-08-21 | 中冶南方工程技术有限公司 | The emulation mode of dry type oil-sealed rotary pump pumping process for RH vacuum refinings |
| CN110295269A (en) * | 2019-06-21 | 2019-10-01 | 敬业钢铁有限公司 | A kind of refining furnace vacuum evacuation device and its vacuum pumping method |
| CN113266676A (en) * | 2021-05-21 | 2021-08-17 | 山东荣泰感应科技有限公司 | Water sealing structure for vacuum furnace |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946856A (en) * | 2015-07-20 | 2015-09-30 | 中国重型机械研究院股份公司 | Multi-stage water vapor injecting pump arrangement mode |
| CN104946856B (en) * | 2015-07-20 | 2017-01-04 | 中国重型机械研究院股份公司 | A kind of layout pattern of multi-level water steam jet pump |
| CN107964576A (en) * | 2017-11-13 | 2018-04-27 | 浙江杭真能源科技股份有限公司 | A kind of vacuum pump system and its method of work for VOD refining furnaces |
| CN107964576B (en) * | 2017-11-13 | 2019-08-02 | 浙江杭真能源科技股份有限公司 | A kind of vacuum pump system and its working method for VOD refining furnace |
| CN108424996A (en) * | 2018-04-04 | 2018-08-21 | 中冶南方工程技术有限公司 | The emulation mode of dry type oil-sealed rotary pump pumping process for RH vacuum refinings |
| CN108424996B (en) * | 2018-04-04 | 2021-01-05 | 中冶南方工程技术有限公司 | Simulation method for air pumping process of full-dry mechanical vacuum pump for RH vacuum refining |
| CN110295269A (en) * | 2019-06-21 | 2019-10-01 | 敬业钢铁有限公司 | A kind of refining furnace vacuum evacuation device and its vacuum pumping method |
| CN110295269B (en) * | 2019-06-21 | 2021-11-26 | 敬业钢铁有限公司 | Vacuumizing method using vacuumizing device of refining furnace |
| CN113266676A (en) * | 2021-05-21 | 2021-08-17 | 山东荣泰感应科技有限公司 | Water sealing structure for vacuum furnace |
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