CN203807512U - Vacuum-pumping device of RH refining furnace - Google Patents
Vacuum-pumping device of RH refining furnace Download PDFInfo
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- CN203807512U CN203807512U CN201420112869.0U CN201420112869U CN203807512U CN 203807512 U CN203807512 U CN 203807512U CN 201420112869 U CN201420112869 U CN 201420112869U CN 203807512 U CN203807512 U CN 203807512U
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- steam
- vacuum
- refining furnace
- aspirator
- condenser
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Abstract
The utility model relates to a vacuum-pumping device of an RH refining furnace, which is used for vacuum pumping of the refining furnace. The vacuum-pumping device comprises a vacuum slot, a water ring vacuum pump, a first exhaust condensing unit, a second exhaust condensing unit, a third exhaust condensing unit, steam pipelines, a cooling water inlet pipeline, a cooling water outlet pipeline, a steam heater and a heat accumulator, wherein the vacuum slot is placed above the refining furnace; the lower part of the vacuum slot is communicated with the refining furnace through two dip pipes; the lateral opening of the vacuum slot is sequentially connected with the first exhaust condensing unit, the second exhaust condensing unit and the third exhaust condensing unit in series through the steam pipelines, and then is connected with the water ring vacuum pump in a break-over manner. The vacuum-pumping device disclosed by the utility model can separately start any one of the three exhaust condensing units or two or all according to difference of the required vacuum degree, meets various vacuum degrees for different types of steel, and is low in energy consumption and low in the required quantity of steam.
Description
Technical field
The utility model relates to a kind of device vacuumizing, and particularly relates to one and is applicable to RH refining furnace vacuum extractor.
Background technology
RH refining furnace is a kind of steel secondary refining tooling for the production of high-quality steel, is widely used in the aspects such as the decarburization, deoxidation of molten steel, degassed, intensification, composition adjustment and ultra low-carbon steel smelting.Facts have proved that RH SECONDARY REFINING IN A VACUUM CHAMBER is to improve Steel Capacity, reduce production costs, expanding production kind, improves the quality of products, and optimizes the important means of steel-smelting production process.
In industrial STEELMAKING PRODUCTION, the equipment vacuumizing often adopting mainly contains lobe pump, water ring vacuum pump and steam-to-vacuum pump, wherein common with water ring vacuum pump and steam-to-vacuum pump.In water ring vacuum pump, gas compression is isothermal, can remove easy gas, can remove in addition dust-laden, moisture gas, but final vacuum is low; Steam-to-vacuum pump has that exhaust capacity is large, the speed of evacuation is fast, pumped gas medium is suitable for the strong feature of ability, is simple in structurely adopted in a large number in metallurgical system without drive disk assembly, the feature such as simple to operate, and the RH furnace of general Steel Plant adopts 5 grades of steam-to-vacuum pumps.
While carrying out refining due to different steel grades in RH refining furnace, need different vacuum tightness, while needing lower vacuum tightness, adopt steam-to-vacuum pump, can consume a large amount of steam; While needing higher vacuum tightness, adopt water ring vacuum pump not reach the vacuum effectiveness needing.Existing vacuum pumping technology, adopts steam-to-vacuum pump, or adopts water ring vacuum pump, and the vacuum tightness reaching is relatively fixing, can not efficient multiple smelting steel, and energy consumption is higher.A kind of defect that can overcome existing pumped vacuum systems, adapt to different steel grades the difference of vacuum tightness is required and the different steel grade of utility model refining, can provide the RH refining furnace vacuum extractor of required vacuum tightness to become those skilled in the art's technical problem urgently to be resolved hurrily high-efficiency low energy consumption.
Utility model content
Technical problem to be solved in the utility model is, overcome the shortcoming of prior art, a kind of RH refining furnace vacuum extractor is provided, adopt the mode of water ring vacuum pump and three groups of condensing works series combinations of bleeding, can be according to the difference of required vacuum tightness, open separately three groups of any a group or two groups or all unlatchings of bleeding in condensing works, can meet the required various vacuum tightnesss of different steel grades, energy consumption is low, and required quantity of steam is little.
In order to solve above technical problem, the utility model provides a kind of RH refining furnace vacuum extractor, vacuumize for refining furnace, comprise vacuum tank, water ring vacuum pump, first condensing works of bleeding, second condensing works of bleeding, the 3rd condensing works of bleeding, steam-pipe, cooling water inlet pipe road, cooling water outlet pipe road, steam heater and thermophore, vacuum tank is placed in the top of refining furnace, the bottom of vacuum tank is communicated with refining furnace by two soaking tubs, vacuum tank side opening connects first successively by described steam-pipe, after second and third condensing works of bleeding, be connected with water ring vacuum pump conducting, wherein:
The every group of condensing works of bleeding comprises an aspirator and a condenser, and vacuum tank side opening is connected successively after the first aspirator, the first condenser, the second aspirator, the second condenser, the 3rd aspirator and the 3rd condenser and is connected with water ring vacuum pump conducting by described steam-pipe;
The water-in of first, second, and third condenser is connected with the conducting of cooling water inlet pipe road by after first, second and third switch-valve respectively, and the water outlet of first, second and third condenser is connected with cooling water outlet pipe road jointly;
The steam inlet of first, second and third aspirator is connected with steam heater steam outlet by first, second and third stopping valve respectively, the steam inlet of steam heater is connected with the steam outlet of thermophore, and the steam inlet of thermophore connects steam-out (SO) source by self-contained pressure regulator.
The technical scheme that the utility model further limits is:
In aforementioned RH refining furnace vacuum extractor, first, second and third aspirator all adopts stream-jet ejector.
In aforementioned RH refining furnace vacuum extractor, refractory brick has all been built in the inside of vacuum tank and soaking tub.
In aforementioned RH refining furnace vacuum extractor, steam-out (SO) source is converter vapourization cooling system.
The beneficial effects of the utility model are:
(1) the utility model adopts the mode of water ring vacuum pump and three groups of condensing works series combinations of bleeding, according to the difference of required vacuum tightness, water ring vacuum pump and the condensing works of bleeding can be opened simultaneously, improve the efficiency vacuumizing, when reducing RH refining furnace and vacuumizing, the large and energy consumption of required quantity of steam.
(2) the utility model adopts three groups of condensing workss of bleeding, when operation, the vapour gas mixture in vacuum tank is extracted out by the first aspirator, and be compressed to a certain intermediate pressure (lower than barometric point), then enter the first condenser, part steam in the first condenser in mixture is condensed into water, and the vapour gas mixture not condensing is taken away by the second aspirator, in the second aspirator, vapour gas mixture is compressed to a little less than barometric point, carry out part vapor condenses Cheng Shui through the second condenser again, the vapour gas mixture not condensed is taken away by the 3rd aspirator, in the 3rd aspirator, vapour gas mixture is compressed to a little more than barometric point, through the 3rd condenser and reclaim working medium and heat, last gas enters atmosphere with the steam not condensing on a small quantity together with water ring vacuum pump twitch, after each aspirator, all there is suitable condenser, can better reduce the load of corresponding aspirator, improve the quality vacuumizing.
(3) ingress of the utility model steam heater is also connected with thermophore, thermophore stores the unnecessary heat of middle pressure steam and when needed institute's heat storage capacity is discharged, when RH refining furnace not the unnecessary middle pressure steam of production period can be stored by thermophore, in the time steaming in steam-out (SO) source for RH refining furnace vapour, when steam-out (SO) source do not produce while stopping vapour by thermophore supply with RH refining furnace smelted a stove with vapour, the quantity of steam that thermophore stores must be greater than the steam consumption of RH refining furnace, ensure to have refined the needed steam of this one heat steel, can not carry through to the end otherwise vacuumize, do not reach the object vacuumizing.
(4) in the utility model device, steam heater is installed, because the middle pressure steam band water that converter vapourization cooling system produces is more, and converter middle pressure steam temperature is general 180-190 DEG C, cannot meet aspirator vapour in RH refining furnace and generally need the requirement of 210-240 DEG C, steam heater is installed to be heated middle pressure steam, make middle pressure steam rapid heating become dry steam for aspirator, if having met RH refining furnace vacuumizes requirement and avoids vapor temperature low simultaneously, in vapour, carry water droplet secretly, can cause water attack and the vibrations of aspirator and water ring vacuum pump, vacuumize and cannot carry out, aspirator and water ring vacuum pump are scrapped at short notice.
(5) for improving stability and the reliability of thermophore in the utility model, ensure thermophore pressure-stabilisation simultaneously, at the steam inlet of thermophore, self-contained pressure regulator is set, the pressure of steam is transferred to relative scope and accesses again thermophore.
(6) aspirator adopting in the utility model is stream-jet ejector, the compact construction of stream-jet ejector, and reliable operation, low cost of manufacture, and can set up required vacuum within a short period of time.
(7) refractory brick has all been built in the inside of vacuum tank and soaking tub, in order to prevent that high-temperature molten steel corrosion from falling the metallic walls of vacuum tank and soaking tub.
The mode of the creationary employing water ring vacuum pump of the utility model and three groups of condensing works series combinations of bleeding, can improve required vacuum tightness in high-efficiency low energy consumption ground, and three groups of condensing workss of bleeding can be according to the difference of required vacuum tightness, according to smelting different steel grades, by corresponding switch-valve and stopping valve, any one group or two groups wherein or all, the adjusting space of this device is large flexibly put into operation, be suitable for the smelting of various steels, also reduced required quantity of steam and energy consumption simultaneously; In addition, economic benefit of the present utility model is that gas decline 30Kg is consumed in ton ore deposit, and a ton ore deposit power consumption increases 0.3KW, and a ton steel benefit is 3 yuan, and annual vacuum pump output is by 2,000,000 tons of calculating, and year increases by 6,000,000 yuan of benefits.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment;
In figure: 1, steam heater, 2, refining furnace, 3, vacuum tank, 4, soaking tub, 5, the first aspirator, 6, the second aspirator, 7, the 3rd aspirator, 8, the first condenser, 9, the second condenser, 10, the 3rd condenser, 11, water ring vacuum pump, 12, thermophore, 13, cooling water inlet pipe road, 14, cooling water outlet pipe road, 15, steam-pipe, 16, the first switch-valve, 17, second switch valve, 18, the 3rd switch-valve, 19, the first stopping valve, 20, the second stopping valve, 21, the 3rd stopping valve, 22, self-contained pressure regulator, 23, first condensing works of bleeding, 24, second condensing works of bleeding, 25, the 3rd condensing works of bleeding.
Embodiment
embodiment 1
A kind of RH refining furnace vacuum extractor that the present embodiment provides, vacuumize for refining furnace 2, structure as shown in Figure 1, comprise vacuum tank 3, water ring vacuum pump 11, first condensing works 23 of bleeding, second condensing works 24 of bleeding, the 3rd condensing works 25 of bleeding, steam-pipe 15, cooling water inlet pipe road 13, cooling water outlet pipe road 14, steam heater 1 and thermophore 12, vacuum tank 3 is placed in the top of refining furnace 2, the bottom of vacuum tank 3 is communicated with refining furnace 2 by two soaking tubs 4, vacuum tank 3 side openings connect first successively by described steam-pipe 15, after second and third condensing works of bleeding, be connected with water ring vacuum pump 11 conductings, wherein:
The every group of condensing works of bleeding comprises an aspirator and a condenser, and vacuum tank 3 side openings are connected successively after the first aspirator 5, the first condenser 8, the second aspirator 6, the second condenser 9, the 3rd aspirator 7 and the 3rd condenser 10 and are connected with water ring vacuum pump 11 conductings by described steam-pipe 15;
The water-in of first, second, and third condenser is respectively by being connected with 13 conductings of cooling water inlet pipe road after first, second and third switch-valve 18, and the water outlet of first, second and third condenser 10 is connected with cooling water outlet pipe road 14 jointly;
The steam inlet of first, second and third aspirator 7 is connected with steam heater 1 steam outlet by first, second and third stopping valve 21 respectively, the steam inlet of steam heater 1 is connected with the steam outlet of thermophore 12, and the steam inlet of thermophore 12 connects steam-out (SO) source by self-contained pressure regulator 22.
In the present embodiment, first, second and third aspirator 7 all adopts stream-jet ejector.
In the present embodiment, refractory brick has all been built in the inside of vacuum tank 3 and soaking tub 4.
In the present embodiment, steam-out (SO) source is converter vapourization cooling system.
When concrete enforcement, the vacuum tightness requirement required according to reality, open in three groups of condensing workss of bleeding any one group until vacuum tank 3 reaches predetermined vacuum tightness, for example open first condensing works 23 of bleeding:
First start water ring vacuum pump 11, the air in vacuum tank 3 enters in steam-pipe 15; Then open first corresponding the first switch-valve 16 of the first condenser 8 in condensing works 23 of bleeding, the water coolant in cooling water inlet pipe road is discharged through the first condenser and from cooling water outlet pipe road;
Open again steam heater 1 and thermophore 12, the middle pressure steam that steam-out (SO) source produces passes through successively thermophore 12 and steam heater 1 after self-contained pressure regulator 22 carries out pressure adjusting, steam heater 1, to heating by the middle pressure steam of thermophore 12, finally forms dry steam;
Finally open the first stopping valve 19 on the first aspirator 5 steam inlets corresponding with the first condenser 8 of above-mentioned unlatching, aforementioned dry steam enters the first aspirator 5 and promotes the first aspirator 5 vacuum tank 3 is vacuumized, until vacuum tank 3 reaches predetermined vacuum tightness and mixed gas is entered to atmosphere by steam-pipe 15.
In concrete enforcement: the operating pressure of thermophore 12 is 1.0-2.5Mpa, the quantity of steam that thermophore stores is greater than RH refining furnace steam consumption; First bleeds condensing works 23 while opening, the first stopping valve 19 on the first switch-valve 16 and the first aspirator 5 on the first condenser 8 is in open mode, and second, third switch-valve 18 and second, third stopping valve 21 be all in closing condition, when second, third condensing works 25 of bleeding is opened separately, the bleed unlatching of condensing works 23 of use-pattern and first is identical.
embodiment 2
The difference of the present embodiment and embodiment 1 is: in the time that RH refining furnace vacuum extractor is specifically implemented, the vacuum tightness requirement required according to reality, embodiment 1 opens three groups of any groups of bleeding in condensing works, the present embodiment is opened any two groups of condensing workss of bleeding wherein until vacuum tank 3 reaches predetermined vacuum tightness, other is identical with embodiment 1, for example, open first condensing works 23 and the 3rd condensing works 25 of bleeding of bleeding wherein:
First start water ring vacuum pump 11, the air in vacuum tank 3 enters in steam-pipe 15; Then open first corresponding the first switch-valve 16 of the first condenser 8 and the 3rd corresponding the 3rd switch-valve 18 of the 3rd condenser 10 in condensing works 25 of bleeding of bleeding in condensing works 23, the water coolant in cooling water inlet pipe road 13 is through the first condenser 8 and the 3rd condenser 10 and discharge from cooling water outlet pipe road 14;
Open again steam heater 1 and thermophore 12, the middle pressure steam that steam-out (SO) source produces passes through successively thermophore 12 and steam heater 1 after self-contained pressure regulator 22 carries out pressure adjusting, steam heater 1, to heating by the middle pressure steam of thermophore 12, finally forms dry steam;
Finally open the 3rd stopping valve 21 on the 3rd corresponding aspirator 7 steam inlets of the first stopping valve 19 on the first aspirator 5 steam inlets corresponding with the first condenser 8 of above-mentioned unlatching and the 3rd condenser 10, aforementioned dry steam enters the first aspirator 5 and the 3rd aspirator 7 and promotes the first aspirator 5 and the 3rd aspirator 7 vacuumizes vacuum tank 3, until vacuum tank 3 reaches predetermined vacuum tightness and mixed gas is entered to atmosphere by steam-pipe 15.
In the present embodiment first, the 3rd bleed condensing works 25 while opening, the first, the 3rd switch-valve 18 and first, the 3rd stopping valve 21 are in open mode, and second switch valve 17 and the second stopping valve 20 be all in closing condition, open second the bleed condensing works 25 or open first condensing works 23 and second of bleeding and bleed the mode of operation of condensing works 24 as the first and the 3rd unlatching of bleeding condensing works 25 in the present embodiment of condensing works 24 and the 3rd of bleeding wherein as selected.
embodiment 3
The difference of the present embodiment and embodiment 1 and 2 is: in the time that RH refining furnace vacuum extractor is specifically implemented, the vacuum tightness requirement required according to reality opened three groups of condensing workss of bleeding until reach predetermined vacuum tightness simultaneously, and other is all identical with embodiment 1 and 2.
First start water ring vacuum pump 11, the air in vacuum tank 3 enters in steam-pipe 15; Then open first, second, third corresponding first, second, third switch-valve 18 of first, second, third condenser 10 in condensing works 25 of bleeding, the water coolant in cooling water inlet pipe road 13 is through first, second and the 3rd condenser 10 and discharge from cooling water outlet pipe road 14;
Open again steam heater 1 and thermophore 12, the middle pressure steam that steam-out (SO) source produces passes through successively thermophore 12 and steam heater 1 after self-contained pressure regulator 22 carries out pressure adjusting, steam heater 1, to heating by the middle pressure steam of thermophore 12, finally forms dry steam;
Finally open and corresponding first, second and the 3rd stopping valve 21 on first, second and the 3rd aspirator 7 steam inlets, aforementioned dry steam enters first, second and the 3rd aspirator 7 and promotes first, second and the 3rd aspirator 7 vacuumizes vacuum tank 3, until vacuum tank 3 reaches predetermined vacuum tightness and mixed gas is entered to atmosphere by steam-pipe 15.
The mode of the creationary employing water ring vacuum pump 11 of the utility model and three groups of condensing works combinations of bleeding, can improve required vacuum tightness in high-efficiency low energy consumption ground, and three groups of condensing workss of bleeding can be according to the difference of required vacuum tightness, come into operation three groups any one group or any two groups or all come into operation that bleeds in condensing works by corresponding switch-valve and stopping valve, adjusting space is large, be suitable for the smelting of various steels, also reduced required quantity of steam and energy consumption simultaneously.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (4)
1. a RH refining furnace vacuum extractor, vacuumize for refining furnace, it is characterized in that: comprise vacuum tank, water ring vacuum pump, first condensing works of bleeding, second condensing works of bleeding, the 3rd condensing works of bleeding, steam-pipe, cooling water inlet pipe road, cooling water outlet pipe road, steam heater and thermophore, described vacuum tank is placed in the top of refining furnace, the bottom of vacuum tank is communicated with refining furnace by two soaking tubs, described vacuum tank side opening connects first successively by described steam-pipe, after second and third condensing works of bleeding, be connected with water ring vacuum pump conducting, wherein:
The described every group of condensing works of bleeding comprises an aspirator and a condenser, and described vacuum tank side opening is connected successively after the first aspirator, the first condenser, the second aspirator, the second condenser, the 3rd aspirator and the 3rd condenser and is connected with described water ring vacuum pump conducting by described steam-pipe;
The water-in of described first, second, and third condenser is connected with the road conducting of described cooling water inlet pipe by after first, second and third switch-valve respectively, and the water outlet of described first, second and third condenser is connected with described cooling water outlet pipe road jointly;
The steam inlet of described first, second and third aspirator is connected with steam heater steam outlet by first, second and third stopping valve respectively, the steam inlet of described steam heater is connected with the steam outlet of thermophore, and the steam inlet of described thermophore connects steam-out (SO) source by self-contained pressure regulator.
2. RH refining furnace vacuum extractor according to claim 1, is characterized in that: described first, second and third aspirator all adopts stream-jet ejector.
3. RH refining furnace vacuum extractor according to claim 1, is characterized in that: refractory brick has all been built in the inside of described vacuum tank and soaking tub.
4. RH refining furnace vacuum extractor according to claim 1, is characterized in that: described steam-out (SO) source is converter vapourization cooling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112869.0U CN203807512U (en) | 2014-03-13 | 2014-03-13 | Vacuum-pumping device of RH refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112869.0U CN203807512U (en) | 2014-03-13 | 2014-03-13 | Vacuum-pumping device of RH refining furnace |
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| Publication Number | Publication Date |
|---|---|
| CN203807512U true CN203807512U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420112869.0U Withdrawn - After Issue CN203807512U (en) | 2014-03-13 | 2014-03-13 | Vacuum-pumping device of RH refining furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN203807512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882186A (en) * | 2014-03-13 | 2014-06-25 | 南京钢铁股份有限公司 | Vacuum-pumping device of RH (Ruhrstahl Hereaeus) refining furnace and use method thereof |
-
2014
- 2014-03-13 CN CN201420112869.0U patent/CN203807512U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882186A (en) * | 2014-03-13 | 2014-06-25 | 南京钢铁股份有限公司 | Vacuum-pumping device of RH (Ruhrstahl Hereaeus) refining furnace and use method thereof |
| CN103882186B (en) * | 2014-03-13 | 2015-09-30 | 南京钢铁股份有限公司 | A kind of RH refining furnace vacuum extractor and using method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20150930 |
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| RGAV | Abandon patent right to avoid regrant |