CN107653359B - Dry-type mechanical vacuumizing device and steel liquid vacuum refining system - Google Patents
Dry-type mechanical vacuumizing device and steel liquid vacuum refining system Download PDFInfo
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- CN107653359B CN107653359B CN201710736121.6A CN201710736121A CN107653359B CN 107653359 B CN107653359 B CN 107653359B CN 201710736121 A CN201710736121 A CN 201710736121A CN 107653359 B CN107653359 B CN 107653359B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention relates to vacuum refinings, a kind of dry-type mechanical vacuumizing device is provided, including air inlet pipe, escape pipe and exhaust pipe, exhaust pipe includes pumping branch, being evacuated branch includes primary dust removing component, Roots's pump group, two-stage dust removal component and screw rod pump group, primary dust removing component, Roots's pump group, two-stage dust removal component and screw rod pump group are sequentially communicated, and primary dust removing component is connected to air inlet pipe, screw rod pump group is connected to escape pipe, is provided with stop valve before level-one on the flow path between primary dust removing component and air inlet pipe；A kind of vacuum refining system, including above-mentioned vacuum evacuation device are also provided.The present invention is respectively arranged with primary dust removing component and two-stage dust removal component in the air inlet of Roots's pump group and screw rod pump group, primary dust removing component has different pressure differences from two-stage dust removal component, so that at work, pressure difference between Roots's pump group and vacuum chamber is not too big, and then vacuum indoor pressure is avoided to be unable to satisfy the pressure requirements that molten steel is vacuum-treated.
Description
Technical field
The present invention relates to molten steel vacuum refining more particularly to a kind of dry-type mechanical vacuumizing devices and molten steel vacuum refining
System.
Background technique
Molten steel vacuum refining as steel industry production high-end product, improve production efficiency, abundant steel products type and
Reduce the indispensable important link of production cost.Steel liquid vacuum refining system is obtained vacuum and is sprayed for many years using steam always
The form that vacuum pump system or steam jet pump are combined with water ring vacuum pump, the two all have operating cost high, and energy consumption is high, efficiency
Low disadvantage.But in application lobe pump, bag filter, which hinder to damage in high vacuum stage of Fig, excessive will lead to Roots's pump intake
It is excessive with internal vacuum chamber pressure difference, and then vacuum indoor pressure is unable to satisfy the pressure requirements of molten steel processing.
Summary of the invention
The purpose of the present invention is to provide a kind of dry-type mechanical vacuumizing devices, it is intended to for solving existing vacuum means
It sets middle Roots's pump intake and internal vacuum chamber pressure difference is excessive, so that vacuum indoor pressure is unable to satisfy molten steel present treatment pressure
It is required that.
The present invention is implemented as follows:
The embodiment of the present invention provides a kind of dry-type mechanical vacuumizing device, including described in air inlet pipe, escape pipe and connection
The exhaust pipe of air inlet pipe and the escape pipe, the exhaust pipe include the pumping for being connected to the air inlet pipe Yu the escape pipe
Branch, the pumping branch includes primary dust removing component, Roots's pump group, two-stage dust removal component and screw rod pump group, and along described
It is evacuated the gas flow path direction of branch, the primary dust removing component, Roots's pump group, the two-stage dust removal component and described
Screw rod pump group is sequentially communicated, and the primary dust removing component is connected to the air inlet pipe, and the screw rod pump group is connected to the escape pipe,
Be provided on flow path between the primary dust removing component and the air inlet pipe control on-off level-one before stop valve.
Further, the exhaust pipe further includes the bypass branch for being connected to air inlet pipe and the escape pipe, the bypass
The gas flow of branch curb successively includes level-one bypass flow path, second level bypass flow path, three-level bypass flow path and level Four bypass flow path,
Four are sequentially communicated, wherein the level-one bypass flow path is connected to the air inlet pipe, the level Four bypass flow path is connected to the outlet
Pipe, the bypass branch are provided with the valve group of control on-off, and the valve group includes four be located in four bypass flow paths
By-passing valve, and the level-one bypass flow path is connected to the air inlet pipe and Roots's pump group, the second level bypass flow path is connected to institute
Primary dust removing component and the two-stage dust removal component are stated, the three-level bypass flow path is connected to Roots's pump group and the screw pump
Group, the level Four bypass flow path are connected to the two-stage dust removal component and the escape pipe.
Further, Roots's pump group include between each other for the multiple groups lobe pump that is arranged in parallel and with each sieve
Thatch pump corresponds and stop valve before multiple lobe pumps for controlling the corresponding lobe pump air inlet, each lobe pump connect
Lead to the primary dust removing component and the two-stage dust removal component.
Further, the screw rod pump group include setting parallel with one another two groups of screw pumps and with each screw pump one
Stop valve before one corresponding and two screw pumps for controlling the corresponding screw pump air inlet, described in each screw pump is connected to
Two-stage dust removal component and the escape pipe.
Further, the primary dust removing component includes cutting off after level-one bag filter and level-one bag filter
Valve, and stop valve is successively set along gas flow after stop valve, the level-one bag filter and the level-one before the level-one
It sets.
Further, the two-stage dust removal component includes being cut before second level after stop valve, second level bag filter and second level
Disconnected valve, and set gradually along gas flow three.
It further, further include that level-one convergence pipe, second level convergence pipe and three-level converge pipe, the level-one bypass flow path
Gas outlet, the gas outlet of the primary dust removing component, the air inlet of second level bypass flow path and Roots's pump group air inlet connect
Pass to the level-one convergence pipe, the gas outlet of the second level bypass flow path, the gas outlet of Roots's pump group, three-level bypass
The air inlet of the air inlet of flow path and the two-stage dust removal component is connected to the second level convergence pipe, the three-level bypass stream
The gas outlet on road, the gas outlet of the two-stage dust removal component, the air inlet of the level Four bypass flow path and the screw rod pump group
Air inlet be connected to three-level convergence pipe.
Further, vacuum main valve is additionally provided in Yu Suoshu air inlet pipe.
The embodiment of the present invention also provides a kind of steel liquid vacuum refining system, including vacuum chamber, further includes above-mentioned vacuumize
Device, the vacuum chamber are connected to the air inlet pipe.
Further, to be provided with gas on flow path of the air inlet pipe between the vacuum chamber and the exhaust pipe cold
But device.
The invention has the following advantages:
In vacuum evacuation device of the invention, according to lobe pump (it is required that gas dust content < 15mg/m3) than screw pump (it is required that
Gas dust content < 5mg/m3) feature small to the susceptibility of dust content, in the air inlet of Roots's pump group and screw rod pump group point
It is not provided with primary dust removing component and two-stage dust removal component, primary dust removing component has different pressure differences from two-stage dust removal component,
So that the pressure difference between Roots's pump group and vacuum chamber is not too big, and then keeps away when handling vacuum chamber
Exempt from the pressure requirements that vacuum indoor pressure is unable to satisfy molten steel vacuum processing.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of steel liquid vacuum refining system provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention provide a kind of dry-type mechanical vacuumizing device, including air inlet pipe 1, escape pipe 2 with
And exhaust pipe 3, wherein air inlet pipe 1 can be connected to vacuum chamber 4, and escape pipe 2 is then to be connected to atmosphere, and exhaust pipe 3 is connected to
Air inlet pipe 1 and escape pipe 2 refine 3 structure of exhaust pipe comprising pumping branch 31, pumping branch 31 are connected to air inlet pipe 1 and go out
Tracheae 2, pumping branch 31 include primary dust removing component 311, Roots's pump group 312, two-stage dust removal component 313 and screw rod pump group
314, and be sequentially communicated along gas flow path direction, four, wherein primary dust removing component 311 and two-stage dust removal component 313 are to use
In filtering pumped gas, and achieve the purpose that two-stage dedusting, and Roots's pump group 312 and screw rod pump group 314 are vacuum evacuation device
Power part, gas in vacuum chamber 4 and pipeline can be extracted after the two work, wherein primary dust removing component 311 is connected to
Air inlet pipe 1, screw rod pump group 314 is connected to escape pipe 2, and is provided on the flow path between primary dust removing component 311 and air inlet pipe 1
Stop valve 3111 before the level-one of the corresponding flow path on-off of control.In the present invention, stop valve 3111 before level-one is opened, in screw rod pump group
314 with Roots's pump group 312 when working, and the air in air inlet pipe 1 is successively through primary dust removing component 311, Roots's pump group 312, second level
The external world is drained by escape pipe 2 after dust removal assembly 313 and screw rod pump group 314, the air being extracted in this process is successively through one
Grade dust removal assembly 311 and two-stage dust removal component 313, can achieve the purpose that two-stage dedusting, two-stage dedusting group to the air of extraction
The pressure difference of part is different, according to lobe pump 3121 (it is required that gas dust content < 15mg/m3) than screw pump 3141 (it is required that gas dust-laden
Measure < 5mg/m3) feature small to the susceptibility of dust content, primary dust removing component 311 is connected to the air inlet of Roots's pump group 312,
Two-stage dust removal component 313 is connected to the air inlet of screw rod pump group 314, so that when to 4 vacuumize process of vacuum chamber, sieve
Pressure difference between thatch pump group 312 and vacuum chamber 4 is not too big, and then pressure in vacuum chamber 4 is avoided to be unable to satisfy at molten steel vacuum
The pressure requirements of reason.
Optimize above-described embodiment, exhaust pipe 3 further includes having bypass branch 32, which is also connected to air inlet pipe 1
With escape pipe 2, and along gas flow, bypass branch 32 divides for four parts, respectively level-one bypass flow path 321, second level bypass
Flow path 322, three-level bypass flow path 323 and level Four bypass flow path 324, four are sequentially communicated, and wherein level-one bypass flow path 321 connects
Logical air inlet pipe 1, level Four bypass flow path 324 are connected to escape pipe 2, are in addition additionally provided with valve group on bypass branch 32, the valve group energy
The on-off of bypass branch 32 is enough controlled, specifically, valve group includes four by-passing valves 325, and four by-passing valves 325 respectively correspond four
Above-mentioned bypass flow path can control the on-off of corresponding bypass flow path, in addition, level-one bypass flow path 321 be also connected to air inlet pipe 1 with
Roots's pump group 312, second level bypass flow path 322 are connected to primary dust removing component 311 and two-stage dust removal component 313, three-level bypass flow path
323 connection Roots's pump groups 312 and screw rod pump group 314, level Four bypass flow path 324 are connected to two-stage dust removal component 313 and air inlet pipe 1.
In the present embodiment, bypass branch 32 is arranged in exhaust pipe 3, and there are four bypass flow paths for the tool of bypass branch 32, and according to above-mentioned
Connectivity structure, level-one bypass flow path 321 are the bypass flow path of primary dust removing component 311, and second level bypass flow path 322 is Roots's pump group
312 corresponding bypass flow paths, three-level bypass flow path 323 are the bypass flow path of two-stage dust removal component 313, level Four bypass flow path 324
It before vacuum extraction, can first be taken out in advance, mainly in air inlet pipe for the corresponding bypass flow path of screw rod pump group 314 for the form
1 before opening, takes out vacuum evacuation device inside in advance, and two parts progress can be divided into advance by taking out, and respectively pre- pumping is quasi-
Standby stage and pre- pumping stage, wherein taking out the preparation stage in advance: air inlet pipe 1 is in close state, and bypass branch 32 corresponding four
By-passing valve 325 is in open state, and stop valve 3111 is closed before level-one, the lobe pump 3121 and screw pump of Roots's pump group 312
The gentle slow start of screw pump 3141 of group 314；Pre- to take out the stage: air inlet pipe 1 is in close state, and bypass branch 32 is corresponding
Four by-passing valves 325 are in closed state, and stop valve 3111 is opened before level-one, the lobe pump 3121 and spiral shell of Roots's pump group 312
The equal fast turn-around of screw pump 3141 of bar pump group 314.Generally, it is provided with vacuum main valve 11 in air inlet pipe 1, passes through vacuum main valve
11 can control the on-off between air inlet pipe 1 and exhaust pipe 3, and after air inlet pipe 1 is connected to vacuum chamber 4, vacuum main valve 11 can
To separate vacuum chamber 4 and exhaust pipe 3, vacuum main valve 11 presets pressure value, when the pressure value in air inlet pipe 1 reaches vacuum
When the setting value of main valve 11, vacuum main valve 11 is opened, and vacuum evacuation device carries out vacuumize process to vacuum chamber 4.Pass through above-mentioned side
Formula can be fast implemented and quickly be taken out in advance before vacuum main valve 11 is opened, additionally by setting mechanical pump (lobe pump 3121 and spiral shells at different levels
Bar, which pumps 3141) by-passing valve 325, may be implemented the steady quick start of mechanical pump.
Continue to optimize above-described embodiment, vacuum evacuation device further includes level-one convergence pipe 33, second level convergence pipe 34 and three-level
Pipe 35 is converged, wherein level-one convergence pipe 33, second level convergence pipe 34 and three-level convergence pipe 35 are the structure similar to multiple-way valve,
For connecting corresponding flow path, specifically, the gas outlet of level-one bypass flow path 321, primary dust removing component 311 gas outlet,
The air inlet of second level bypass flow path 322 and the air inlet of Roots's pump group 312 are connected to level-one convergence pipe 33, second level bypass stream
The gas outlet on road 322, the gas outlet of Roots's pump group 312, three-level bypass flow path 323 air inlet and two-stage dust removal component 313
Air inlet be connected to second level convergence pipe 34, the gas outlet of three-level bypass flow path 323, two-stage dust removal component 313 gas outlet,
The air inlet of level Four bypass flow path 324 and the air inlet of screw rod pump group 314 are connected to three-level convergence pipe 35.Using this knot
Structure can simplify each bypass flow path and the connection structure being evacuated between branch 31, and each port need to be only connected to corresponding convergence pipe,
It is more convenient.
Further, the structure of Roots's pump group 312 is refined comprising cut before multiple groups lobe pump 3121 and multiple lobe pumps
Disconnected valve 3122, can generally choose three groups of lobe pumps 3121, parallel with one another between each lobe pump 3121, connection primary dust removing component
311 with two-stage dust removal component 313, specifically, each lobe pump 3121 be connected to level-one convergence pipe 33 and second level convergence pipe 34, two
Grade bypass flow path 322 is the bypass flow path of each lobe pump 3121, and stop valve 3,122 1 before each lobe pump 3121 and each lobe pump
One is corresponding, and stop valve 3122 can control the air inlet of corresponding lobe pump 3121 before each lobe pump.For screw rod pump group 314, packet
It includes two groups of screw pumps 3141 of setting parallel with one another and is corresponded with each screw pump 3141 and be used to control corresponding screw pump
Stop valve 3142 before two screw pumps of 3141 air inlets, each screw pump 3141 are connected to two-stage dust removal component 313 and escape pipe 2,
Specifically, each screw pump 3141 is connected to three-level convergence pipe 35 and escape pipe 2, and level Four bypass flow path 324 is two screw pumps
3141 bypass flow path.And primary dust removing component 311 is similar with the structure of two-stage dust removal component 313, wherein primary dust removing group
Part 311 includes stop valve after level-one bag filter 3112 and level-one bag filter 3112, and stop valve 3111 before level-one,
Stop valve 3113 is set gradually along gas flow after level-one bag filter 3112 and level-one, and two-stage dust removal component 313 wraps
Include stop valve 3131 before second level, stop valve 3133 after second level bag filter 3132 and second level, and along gas flow three according to
Secondary setting, wherein level-one bag filter 3112 and second level bag filter 3132 are main dedusting structure, the two into
Port and gas outlet position are provided with stop valve.
The embodiment of the present invention also provides a kind of steel liquid vacuum refining system, including vacuum chamber 4 and above-mentioned vacuum means
It sets, vacuum chamber 4 is connected to air inlet pipe 1.In the present embodiment, above-mentioned vacuum evacuation device is used in combination with vacuum chamber 4, by this
Vacuum evacuation device can extract the air in vacuum chamber 4, it is ensured that pressure can meet molten steel in vacuum always in vacuum chamber 4
Pressure requirements when refining.Certainly since in vacuum refining process, the atmospheric heat that vacuum evacuation device extracts is very high, to keep away
Exempting from overfire air influences the service life of each component of vacuum evacuation device, then gas cooler 5 is additionally provided in air inlet pipe 1, should
Gas cooler 5 is particularly located between vacuum chamber 4 and vacuum main valve 11 on the flow path between vacuum chamber 4 and exhaust pipe 3
Flow path on, the air themperature extracted in vacuum chamber 4 can be reduced, avoid enter into the sky in vacuum main valve 11 and subsequent flow path
Temperature spends height.
Otherwise for the vacuum refining system of above structure form, vacuumizing phase is broadly divided into four at work, according to
Secondary is respectively to take out preparation stage, pre- pumping stage, total system vacuumizing phase in advance and move back the pump stage, specifically, can be under
The mode of stating carries out:
Pre- preparation stage-vacuum main valve 11 of taking out is closed, and 32 corresponding four by-passing valves 325 of bypass branch are in opening state
State, stop valve 3122 is opened before each lobe pump, the gentle slow start of each lobe pump 3121, and stop valve 3142 is opened before each screw pump
It opens, the gentle slow start of each screw pump 3141；
Pre- stage-vacuum main valve 11 of taking out is closed, and 32 corresponding four by-passing valves 325 of bypass branch are in closed state,
Stop valve 3131, second level before stop valve 3122, second level before stop valve 3113, each lobe pump after stop valve 3111, level-one before level-one
Stop valve 3142 is opened before stop valve 3133 and each screw pump afterwards, each lobe pump 3121 and each screw pump 3141 quick fortune
Turn, opens vacuum main valve 11 after 11 pressure of vacuum main valve is lower than setting pressure and enter total system vacuumizing phase；
Total system vacuumizing phase-vacuum main valve 11 is opened, and 32 corresponding four by-passing valves 325 of bypass branch are in pass
Closed state, stop valve before stop valve 3122, second level before stop valve 3113, each lobe pump after stop valve 3111, level-one before level-one
3131, stop valve 3142 is opened before stop valve 3133 and each screw pump after second level, each lobe pump 3121 and each screw pump
3141 equal fast turn-arounds, system enters molten steel vacuum refining processing stage after pressure reaches setting value in vacuum chamber 4, and molten steel is true
Enter after the completion of empty refining treatment and moves back the pump stage；
- the closing of vacuum main valve 11 is moved back the pump stage, 32 corresponding four by-passing valves 325 of bypass branch are in open state,
Stop valve 3131, second level before stop valve 3122, second level before stop valve 3113, each lobe pump after stop valve 3111, level-one before level-one
Stop valve 3142 is turned off before stop valve 3133 and each screw pump afterwards, and each lobe pump 3121 slowly stops with each screw pump 3141
Pump.
In the above-mentioned course of work, the pre- Cheng Feichang that is pumped through before vacuum main valve 11 is opened is quick, and each lobe pump 3121
With each screw pump 3141 can quick and stable operate, working efficiency is relatively high.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of dry-type mechanical vacuumizing device, including air inlet pipe, escape pipe and the connection air inlet pipe and the escape pipe
Exhaust pipe, it is characterised in that: the exhaust pipe includes the pumping branch for being connected to the air inlet pipe Yu the escape pipe, institute
Stating pumping branch includes primary dust removing component, Roots's pump group, two-stage dust removal component and screw rod pump group, and along the pumping branch
Gas flow path direction, the primary dust removing component, Roots's pump group, the two-stage dust removal component and the screw rod pump group
It is sequentially communicated, and the primary dust removing component is connected to the air inlet pipe, the screw rod pump group is connected to the escape pipe, Yu Suoshu mono-
Grade dust removal assembly and the air inlet pipe between flow path on be provided with control on-off level-one before stop valve.
2. dry-type mechanical vacuumizing device as described in claim 1, it is characterised in that: the exhaust pipe further include be connected into
The bypass branch of tracheae and the escape pipe, the bypass branch successively include level-one bypass flow path along gas flow, by second level
Through-flow road, three-level bypass flow path and level Four bypass flow path, four are sequentially communicated, wherein described in level-one bypass flow path connection
Air inlet pipe, the level Four bypass flow path are connected to the escape pipe, and the bypass branch is provided with the valve group of control on-off, the valve
Group includes four by-passing valves being located in four bypass flow paths, and the level-one bypass flow path is connected to the air inlet pipe and institute
State Roots's pump group, the second level bypass flow path is connected to the primary dust removing component and the two-stage dust removal component, by the three-level
Roots's pump group and the screw rod pump group described in logical fluid communication, the level Four bypass flow path are connected to the two-stage dust removal component and institute
State escape pipe.
3. dry-type mechanical vacuumizing device as claimed in claim 2, it is characterised in that: Roots's pump group includes mutual
It is corresponded for the multiple groups lobe pump being arranged in parallel and with each lobe pump and for controlling the corresponding lobe pump air inlet
Multiple lobe pumps before stop valve, each lobe pump is connected to the primary dust removing component and the two-stage dust removal component.
4. dry-type mechanical vacuumizing device as claimed in claim 2, it is characterised in that: the screw rod pump group includes parallel with one another
It two groups of screw pumps being arranged and is corresponded with each screw pump and two for controlling the corresponding screw pump air inlet
Stop valve before screw pump, each screw pump are connected to the two-stage dust removal component and the escape pipe.
5. dry-type mechanical vacuumizing device as claimed in claim 2, it is characterised in that: the primary dust removing component includes level-one
Stop valve after bag filter and level-one bag filter, and before the level-one stop valve, the level-one bag filter with
And stop valve is set gradually along gas flow after the level-one.
6. dry-type mechanical vacuumizing device as claimed in claim 2, it is characterised in that: the two-stage dust removal component includes second level
Stop valve after preceding stop valve, second level bag filter and second level, and set gradually along gas flow three.
7. dry-type mechanical vacuumizing device as claimed in claim 2, it is characterised in that: further include level-one convergence pipe, second level remittance
Poly- pipe and three-level convergence pipe, the gas outlet of the level-one bypass flow path, the gas outlet of the primary dust removing component, second level bypass
The air inlet of flow path and the air inlet of Roots's pump group are connected to the level-one convergence pipe, the outlet of the second level bypass flow path
Mouth, the gas outlet of Roots's pump group, the air inlet of the three-level bypass flow path and the two-stage dust removal component air inlet
Be connected to second level convergence pipe, the gas outlet of the three-level bypass flow path, the two-stage dust removal component gas outlet, described
The air inlet of level Four bypass flow path and the air inlet of the screw rod pump group are connected to the three-level convergence pipe.
8. dry-type mechanical vacuumizing device as described in claim 1, it is characterised in that: be additionally provided in Yu Suoshu air inlet pipe true
Empty main valve.
9. a kind of steel liquid vacuum refining system, including vacuum chamber, it is characterised in that: further include such as any one of claim 1-8 institute
The vacuum evacuation device stated, the vacuum chamber are connected to the air inlet pipe.
10. steel liquid vacuum refining system as claimed in claim 9, it is characterised in that: the air inlet pipe in the vacuum chamber with
Gas cooler is provided on flow path between the exhaust pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736121.6A CN107653359B (en) | 2017-08-24 | 2017-08-24 | Dry-type mechanical vacuumizing device and steel liquid vacuum refining system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710736121.6A CN107653359B (en) | 2017-08-24 | 2017-08-24 | Dry-type mechanical vacuumizing device and steel liquid vacuum refining system |
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| CN107653359A CN107653359A (en) | 2018-02-02 |
| CN107653359B true CN107653359B (en) | 2019-08-06 |
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| CN107653359B (en) * | 2017-08-24 | 2019-08-06 | 中冶南方工程技术有限公司 | Dry-type mechanical vacuumizing device and steel liquid vacuum refining system |
| CN110332097B (en) * | 2019-05-21 | 2021-10-22 | 洛阳兰迪玻璃机器股份有限公司 | Vacuum glass air extraction method and air extraction device |
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