CN204337960U - Liquid steel refining dry vacuum system whirlwind-cloth bag complex filter - Google Patents
Liquid steel refining dry vacuum system whirlwind-cloth bag complex filter Download PDFInfo
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- CN204337960U CN204337960U CN201420810369.4U CN201420810369U CN204337960U CN 204337960 U CN204337960 U CN 204337960U CN 201420810369 U CN201420810369 U CN 201420810369U CN 204337960 U CN204337960 U CN 204337960U
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Abstract
The utility model discloses a kind of liquid steel refining dry vacuum system whirlwind-cloth bag complex filter, comprise deashing device, bag district filter and whirlwind district filter; The gas feed of described cylindrical shell is arranged on below cylindrical shell, and gas vent is arranged on above cylindrical shell; Described whirlwind district filter comprises flue-dust retainer, inner conical-tube and air distribution plate, and described flue-dust retainer is arranged on cylinder body bottom and is connected with cylindrical shell, and described inner conical-tube is arranged on gas feed place below cylindrical shell, and described air distribution plate is arranged in inner conical-tube; Described bag district filter comprises card, filter bag and cage, and described card is fixed on cylindrical shell, and described filter bag and cage are arranged on card; This device sets advantage of traditional cyclone type and bag filter, effectively can be separated the big dust particle of more than 10 μm, and flue-gas temperature is reduced, thus decrease the live load of filter bag and big dust particle to the souring of filter bag, extend the service life of cleaning cycle and filter bag.
Description
Technical field
The utility model belongs to liquid steel refining dry vacuum system art of filters, is specifically related to a kind of liquid steel refining dry vacuum system whirlwind-cloth bag complex filter.
Background technology
In field of metallurgy, dry vacuum system is the emerging application of one in molten steel furnace external refining, and it adopts dry-type mechanical pump to substitute traditional wet type steam jet pump as pumping equipment.Molten steel is carried out in the process of the outer vacuum refining of stove; the a large amount of dust produced from molten steel can enter vacuum pipe along with process gas; for the oil-sealed rotary pump in protection dry vacuum system, need filter be set before oil-sealed rotary pump process gas is purified.
The process gas composition of liquid steel refining is more complicated, and containing hydrogen, oxygen, nitrogen, argon gas, carbon monoxide, carbon dioxide etc., particularly in molten steel decarbonizing process, carbon monoxide content is higher, once leakage can cause personnel poisoning or produce blast danger.And flue dust grit temperature in process gas is higher, flue dust particle diameter is little, be generally 0.4 μm ~ 100+ μm, its main component is manganese oxide, iron oxide and other metal oxides (Al, Zn, K, Na, Pb etc.), meets air and very easily occurs spontaneous combustion and Mars phenomenon.
Traditional typical filter device mostly is cyclone filter and bag filter.
Cyclone filter utilizes centrifugal force to remove dust granules from process gas, and this filtration device structure is simple, movement-less part, low cost, maintenance management are convenient, and efficiency of dust collection generally can reach about 85%.But cyclone filter is poor for the dust collection effect of less than 10 μm particle diameters; Leak out comparatively large on the impact of its efficiency simultaneously, have data to show, leak out when reaching 5%, efficiency can reduce by 50%, leak out 10 ~ 15% time efficiency near 0.
Traditional bag filter is a kind of cleaner utilizing the bag-like filter element of porous (filtrate) to collect dust from dusty gas, primarily of filter and deashing device composition.When dusty gas is by filtrate, main rely on filter media fibre sieving, interception, collision, diffusion and electrostatic attraction effect, by dust detention on filtrate.When the dust of filter bag surface sediment reaches certain thickness, the pressure loss of equipment increases, disposal ability reduces, and must carry out deashing, to ensure the gas permeability needed for filter bag continuous firing by deashing device to filter bag.The casing of conventional bag filter is generally square, when working under negative pressure, often produce the situation that wallboard caves in due to housing insufficient rigidity, the wallboard resilience when system is pressed again, make equipment produce the larger sound and vibrations, the security of operation of equipment time serious, can be affected.
Tradition cyclone type and bag filter all allow certain leakage rate (air leak rate of air curtain), but in liquid steel refining dry vacuum system, due to the impact of smoke components and Dust Characteristics, once enter air in system, not only reduce the vacuum of system, affect the effect of liquid steel refining, and dust spontaneous combustion, scaling loss filter bag can be made, make dust granules be entered oil-sealed rotary pump, damage is caused to vavuum pump.
Summary of the invention
In view of this, the purpose of this utility model be to provide that a kind of leakage rate is low, good filtration effect and the high liquid steel refining dry vacuum system whirlwind-cloth bag complex filter of security.
For achieving the above object, the utility model provides following technical scheme: a kind of liquid steel refining dry vacuum system whirlwind-cloth bag complex filter, comprises the deashing device be successively set on from high to low in cylindrical shell, bag district filter and whirlwind district filter; The gas feed of described cylindrical shell is arranged on below cylindrical shell, and gas vent is arranged on above cylindrical shell; Described whirlwind district filter comprises flue-dust retainer, inner conical-tube and air distribution plate, and described flue-dust retainer is arranged on cylinder body bottom and is connected with cylindrical shell, and described inner conical-tube is arranged on gas feed place below cylindrical shell, and described air distribution plate is arranged in inner conical-tube; Described bag district filter comprises card, filter bag and cage, and described card is fixed on cylindrical shell, and described filter bag and cage are arranged on card; Described deashing device comprises Venturi tube and blowing device, and described Venturi tube is arranged on cage upper end, and described blowing device is arranged on above Venturi tube.
Further, also comprise self sealss automatic pressure releasing mechanism, urgent nitrogen fill valve, ash-discharging device and control system, described self sealss automatic pressure releasing mechanism and urgent nitrogen fill valve are separately positioned on cylindrical shell top, and described ash-discharging device is arranged on bottom flue-dust retainer.
Further, in described inner conical-tube, be interval with air distribution plate I and air distribution plate II from top to bottom, between described air distribution plate I and air distribution plate II, be provided with wind mixed chamber.
Further, described flue-dust retainer is provided with rapping apparatus.
Further, gear ash-pan is also provided with in described flue-dust retainer.
The beneficial effects of the utility model are:
1. this device sets advantage of traditional cyclone type and bag filter, dust-laden smoke in whirlwind district by centrifugal force and Action of Gravity Field, effectively can be separated the big dust particle of more than 10 μm, and flue-gas temperature is reduced, thus decrease the live load of filter bag and big dust particle to the souring of filter bag, effectively extend the service life of cleaning cycle and filter bag;
2. adopt vacuum system container self sealss automatic pressure releasing mechanism, achieve the effective sealing under vacuum, effectively prevent that equipment internal gas pressure is too high causes the security incidents such as blast, enhance the safety and reliability of equipment;
3. automaticity is high, and each several part, by control system Real-Time Monitoring, is not only easy to control, more improves the safety and reliability of equipment.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly, the utility model provides following accompanying drawing to be described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
As shown in the figure, the liquid steel refining dry vacuum system whirlwind-cloth bag complex filter in the present embodiment, comprises the deashing device be successively set on from high to low in cylindrical shell 1, bag district filter and whirlwind district filter; The gas feed 2 of described cylindrical shell 1 is arranged on below cylindrical shell 1, and gas vent 3 is arranged on above cylindrical shell 1; Described whirlwind district filter comprises flue-dust retainer 4, inner conical-tube 5, air distribution plate I 6 and air distribution plate II 7, described flue-dust retainer 4 to be arranged on bottom cylindrical shell 1 and to be connected with cylindrical shell 1, described inner conical-tube 5 is arranged on gas feed 2 place below cylindrical shell 1, air distribution plate I 6 and air distribution plate II 7 are disposed on lower end in inner conical-tube 5 and upper end, and the spacer region between two air distribution plates forms wind mixed chamber 8; Described bag district filter comprises card 9, filter bag 10 and cage 11, and described card 9 is fixed on cylindrical shell 1, and described filter bag 10 and cage 11 are arranged on card 9; Described deashing device comprises Venturi tube 12 and blowing device 13, and described Venturi tube 12 is arranged on cage 11 upper end, and described blowing device 13 is arranged on above Venturi tube 12.
Liquid steel refining dry vacuum system whirlwind-cloth bag complex filter in the present embodiment, also comprise self sealss automatic pressure releasing mechanism 14, urgent nitrogen fill valve 15, ash-discharging device and control system, described self sealss automatic pressure releasing mechanism 14 and urgent nitrogen fill valve 15 are separately positioned on cylindrical shell 1 top, and described ash-discharging device is arranged on bottom flue-dust retainer 4.
In the present embodiment, self sealss automatic pressure releasing mechanism 14 adopts vacuum system container self sealss automatic pressure releasing mechanism, effectively can prevent that equipment internal gas pressure is too high causes the security incidents such as blast, and can effective sealing under vacuo, enhance the safety and reliability of equipment.Ash-discharging device comprises discharge valve 16 and vacuum isolating valve 17, and described vacuum isolating valve 17 is arranged between discharge valve 16 and flue-dust retainer 4; Vacuum isolating valve 17 ensures equipment positiver sealing unload ash uniformly under condition under vacuo, prevents from, because air enters a bag district when unloading ash, causing the dust spontaneous combustion of accumulation on filter bag 10 simultaneously, thus scaling loss filter bag 10.Control system comprises PLC system, material-level detection system 19, system for detecting temperature (grey side thermometer 20, bag side thermometer 21) and differential pressure measuring system 22; Wherein, described material-level detection system 19 can the ash quantity of measuring set ash bucket 4, and described system for detecting temperature can measure the temperature of bag side and grey side, and described differential pressure measuring system 22 can measure pressure reduction before and after filter bag 10.
As the further improvement of such scheme, described flue-dust retainer 4 is provided with rapping apparatus 23, is also provided with gear ash-pan 24 in flue-dust retainer 4.
Concrete, dust-laden smoke tangentially enters from gas feed 2, and rotate along the circular passage formed between inner conical-tube 5 and flue-dust retainer 4 and decline, realize first order dedusting under the influence of centrifugal force, the grit separated enters flue-dust retainer 4 by bulkhead; When dust-laden smoke arrives bottom inner conical-tube 5, air-flow is sharply turned back upwards, and flue gas grit produces inertial settling under gravity, realizes second level dedusting; Inner conical-tube 5 in the present embodiment is gradual-enlargement type, can reduce air velocity; The gear ash-pan 24 arranged in flue-dust retainer 4, can reduce the reentrainment of dust phenomenon caused because of gas shock; Ash-laden gas through whirlwind gravitational dust collection continues to rise, and after the air distribution plate I 6 arranged inner conical-tube 5 in, enters buffering in wind mixed chamber 8 and also mixes further, more evenly enters a bag district by air distribution plate II 7 and realize bag-type dusting.When dust-laden smoke is by bag district, under the effect of the sieving of filter bag 10, interception, collision, diffusion and electrostatic attraction, grit detention, on filter bag 10, completes third level dedusting, and last clean gas is discharged from gas vent 3.
In the present embodiment, dust-laden smoke in whirlwind district by centrifugal force and Action of Gravity Field, effectively can be separated the big dust particle of more than 10 μm, and flue-gas temperature is reduced (in process gas, contained high temperature grit carries amount of heat), thus decrease the live load of filter bag 10 and big dust particle to the souring of filter bag 10, effectively extend the service life of cleaning cycle and filter bag 10.
In the present embodiment, be equipped with deashing device above bag district filter, deashing device forms primarily of Venturi tube 12 and blowing device 13; Wherein, blowing device 13 comprises correspondence and is arranged on some injection tubes 25 above filter bag 10 and nozzle, each injection tube 25 is connected with winding-up collector 26, the corresponding pulse valve 27 be provided with for controlling each injection tube 25 flow on winding-up collector 26, and pulse valve 27 is controlled by PLC system; This deashing device can realize timing deashing or utilize pressure differential detection result to determine deashing opportunity, and automaticity is high, is easy to control.
Cylindrical shell 1 in the present embodiment is cylindrical, flue-dust retainer 4 is inversed taper platform shape, and cylindrical shell 1 and flue-dust retainer 4 outer wall place are provided with reinforcement, can guarantee that apparatus casing does not deform under a high vacuum.
In the present embodiment, the temperature of bag side thermometer 21 and grey side thermometer 20 difference detection bag district and flue-dust retainer 4, prevents the dust spontaneous combustion of flue gas overtemperature or accumulation from causing filter bag 10 scaling loss; Once overtemperature be detected, PCL system makes urgent nitrogen fill valve 15 in equipment, be filled with nitrogen by control signal to carry out lowering the temperature and the burning stoping dust.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model by above preferred embodiment, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from the utility model claims limited range.
Claims (5)
1. liquid steel refining dry vacuum system whirlwind-cloth bag complex filter, is characterized in that: comprise the deashing device be successively set on from high to low in cylindrical shell, bag district filter and whirlwind district filter; The gas feed of described cylindrical shell is arranged on below cylindrical shell, and gas vent is arranged on above cylindrical shell; Described whirlwind district filter comprises flue-dust retainer, inner conical-tube and air distribution plate, and described flue-dust retainer is arranged on cylinder body bottom and is connected with cylindrical shell, and described inner conical-tube is arranged on gas feed place below cylindrical shell, and described air distribution plate is arranged in inner conical-tube; Described bag district filter comprises card, filter bag and cage, and described card is fixed on cylindrical shell, and described filter bag and cage are arranged on card; Described deashing device comprises Venturi tube and blowing device, and described Venturi tube is arranged on cage upper end, and described blowing device is arranged on above Venturi tube.
2. liquid steel refining dry vacuum system whirlwind-cloth bag complex filter according to claim 1, it is characterized in that: also comprise self sealss automatic pressure releasing mechanism, urgent nitrogen fill valve, ash-discharging device and control system, described self sealss automatic pressure releasing mechanism and urgent nitrogen fill valve are separately positioned on cylindrical shell top, and described ash-discharging device is arranged on bottom flue-dust retainer.
3. liquid steel refining dry vacuum system whirlwind-cloth bag complex filter according to claim 1, is characterized in that: be interval with air distribution plate I and air distribution plate II in described inner conical-tube from top to bottom, is provided with wind mixed chamber between described air distribution plate I and air distribution plate II.
4. liquid steel refining dry vacuum system whirlwind-cloth bag complex filter according to claim 1, is characterized in that: described flue-dust retainer is provided with rapping apparatus.
5. liquid steel refining dry vacuum system whirlwind-cloth bag complex filter according to claim 1, is characterized in that: be also provided with gear ash-pan in described flue-dust retainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420810369.4U CN204337960U (en) | 2014-12-19 | 2014-12-19 | Liquid steel refining dry vacuum system whirlwind-cloth bag complex filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420810369.4U CN204337960U (en) | 2014-12-19 | 2014-12-19 | Liquid steel refining dry vacuum system whirlwind-cloth bag complex filter |
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| Publication Number | Publication Date |
|---|---|
| CN204337960U true CN204337960U (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420810369.4U Expired - Fee Related CN204337960U (en) | 2014-12-19 | 2014-12-19 | Liquid steel refining dry vacuum system whirlwind-cloth bag complex filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032108A (en) * | 2015-09-12 | 2015-11-11 | 陈美青 | Dust remover |
| CN106139810A (en) * | 2016-08-31 | 2016-11-23 | 合肥合意环保科技工程有限公司 | A kind of self-rotary filter for mineral hot furnace flue gas cleaning |
| CN106377965A (en) * | 2016-11-07 | 2017-02-08 | 首钢总公司 | Dust removal device and method for pressure-equalized coal gas |
| CN106399639A (en) * | 2016-01-19 | 2017-02-15 | 陈莉菲 | Dry type mechanical vacuum pump degassing system and method for liquid steel secondary refining |
| CN108404537A (en) * | 2018-03-30 | 2018-08-17 | 川田机械制造(上海)有限公司 | A kind of bag filter |
-
2014
- 2014-12-19 CN CN201420810369.4U patent/CN204337960U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032108A (en) * | 2015-09-12 | 2015-11-11 | 陈美青 | Dust remover |
| CN106399639A (en) * | 2016-01-19 | 2017-02-15 | 陈莉菲 | Dry type mechanical vacuum pump degassing system and method for liquid steel secondary refining |
| CN106399639B (en) * | 2016-01-19 | 2018-05-08 | 陈莉菲 | Dry-type mechanical vacuum pump degassing system and degassing method for steel secondary refining |
| CN106139810A (en) * | 2016-08-31 | 2016-11-23 | 合肥合意环保科技工程有限公司 | A kind of self-rotary filter for mineral hot furnace flue gas cleaning |
| CN106377965A (en) * | 2016-11-07 | 2017-02-08 | 首钢总公司 | Dust removal device and method for pressure-equalized coal gas |
| CN108404537A (en) * | 2018-03-30 | 2018-08-17 | 川田机械制造(上海)有限公司 | A kind of bag filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20211219 |