CN204337962U - Liquid steel refining dry vacuum system electricity consumption-bag integral filter - Google Patents
Liquid steel refining dry vacuum system electricity consumption-bag integral filter Download PDFInfo
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- CN204337962U CN204337962U CN201420813335.0U CN201420813335U CN204337962U CN 204337962 U CN204337962 U CN 204337962U CN 201420813335 U CN201420813335 U CN 201420813335U CN 204337962 U CN204337962 U CN 204337962U
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Abstract
The utility model discloses a kind of liquid steel refining dry vacuum system electricity consumption-bag integral filter, comprise cylindrical shell, dividing plate cylindrical shell being separated into electric district and bag district is provided with in described cylindrical shell, flue-dust retainer is arranged on cylinder body bottom and is connected with cylindrical shell, electric region filter is established in the side, electric district of described cylindrical shell, bag district's filter is provided with in the side, bag district of described cylindrical shell, the gas feed of described cylindrical shell is arranged on above electric district Ce electricity district filter, and gas vent is arranged on above bag Ce Dai district of district filter; This device sets advantage of electrostatic filter and bag filter, first order dedusting is realized by electric district filter, the part dust in dusty gas can be removed, and flue-gas temperature is obviously reduced, dusty gas after primary dust removing passes through bag district's filter again, realizes second level dedusting, not only good dedusting effect, also effectively reduce the live load of filter bag and dust granules to the souring of filter bag, extend cleaning cycle and life of bag filter.
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 electricity consumption-bag integral 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, its main component is manganese oxide, iron oxide and other metal oxides (Al, Zn, K, Na, Pb etc.), and flue dust particle diameter is 0.4 μm ~ 100+ μm, meets air and there will be spontaneous combustion and Mars phenomenon.
Traditional typical filter device form has electrostatic filter and bag filter etc.
Electrostatic filter utilizes electrostatic force to remove dust granules from process gas, and it is primarily of compositions such as body, DC high-voltage power supply, deashing devices.Metal dust collecting electrode (positive plate) that be arranged with One's name is legion in body, that keep a determining deviation and corona discharge electrode (cathode line), in order to produce corona, trapping dust.The advantage of electrostatic filter: efficiency of dust collection is high, can reach about 99% (many electric fields); Bulk density loss is little, and under normal pressure, (or tiny structure) is generally 160 ~ 300Pa; Energy consumption is low, and process 1000m3/h flue gas about needs 0.2 ~ 0.6kWh; Smoke treatment amount is large; Heat resistance is good, generally can work at 350 ~ 400 DEG C.But its shortcoming also clearly, and main manifestations is: complex structure, steel consume many, and one-time investment is high; Making and installation required precision is high; Responsive to Dust Characteristics, optimum dust specific resistance scope 104 ~ 5 × 1010 Ω cm, if outside this scope, even if adopt the electric field of more than 4, its concentration of emission also cannot reach below 100mg/m3.
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.Relative to electrostatic filter, the shortcoming of bag filter: be not suitable for running work at high operating temperatures, Long-term service temperature is no more than 200 DEG C, the limit of working temperature is no more than 260 DEG C (in short-term); Drag losses is comparatively large, and under normal pressure, (or tiny structure) is generally 800 ~ 1200Pa.
The casing of conventional electrostatic formula and 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.
Conventional electrostatic formula 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 systems in which, 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 is to provide that a kind of structure is simple, good filtration effect, can bears the liquid steel refining dry vacuum system electricity consumption-bag integral filter of larger negative pressure and explosion-proof performance.
For achieving the above object, the utility model provides following technical scheme: a kind of liquid steel refining dry vacuum system electricity consumption-bag integral filter, comprise cylindrical shell, dividing plate cylindrical shell being separated into electric district and bag district is provided with in described cylindrical shell, flue-dust retainer is arranged on cylinder body bottom and is connected with cylindrical shell, electric region filter is established in the side, electric district of described cylindrical shell, bag district's filter is provided with in the side, bag district of described cylindrical shell, the gas feed of described cylindrical shell is arranged on above electric district Ce electricity district filter, and gas vent is arranged on above bag Ce Dai district of district filter.
Further, also comprise pressure relief device, urgent nitrogen fill valve, ash-discharging device and PLC control system, described pressure relief device 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, described electric district filter comprises air distribution plate I, the DC high-voltage power supply be arranged on cylinder lateral wall, the positive plate be crisscross arranged and cathode line, for the anode vibration body of vibration dust-cleaning and cathode rapping mechanism, described air distribution plate I is arranged on above positive plate and cathode line.
Further, described bag district filter comprises card, filter bag, cage, air distribution plate II and deashing device, and described card is fixed on cylindrical shell and dividing plate, and described filter bag and cage are arranged on card, and described air distribution plate II is arranged on below filter bag and cage; Described deashing device is primarily of Venturi tube and blowing device composition, and described Venturi tube is arranged on cage upper end, and described blowing device is arranged on above Venturi tube.
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 electrostatic filter and bag filter, first order dedusting is realized by electric district filter, the part dust in dusty gas can be removed, and flue-gas temperature is obviously reduced, dusty gas after primary dust removing passes through bag district's filter again, realizes second level dedusting, not only good dedusting effect, also effectively reduce the live load of filter bag and dust granules to the souring of filter bag, extend cleaning cycle and life of bag filter;
2. pressure relief device adopts the combination of rupture disk+explosion proof door, achieves the effective sealing under vacuum, effectively prevent that equipment internal gas pressure is too high causes the security incidents such as blast, enhances the safety and reliability of equipment;
3. automaticity is high, and each several part, by PLC control system Real-Time Monitoring, is not only easy to control, more improves the safety and reliability of equipment, decrease staffing, saved cost input.
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 A-A sectional view in 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, liquid steel refining dry vacuum system electricity consumption-bag integral filter in the present embodiment, comprise cylindrical shell 1, the dividing plate 2 cylindrical shell 1 being separated into electric district and bag district is provided with in described cylindrical shell 1, flue-dust retainer 3 to be arranged on bottom cylindrical shell 1 and to be connected with cylindrical shell 1, electric region filter is established in the side, electric district of described cylindrical shell 1, bag district's filter is provided with in the side, bag district of described cylindrical shell 1, the gas feed 4 of described cylindrical shell 1 is arranged on above electric district Ce electricity district filter, and gas vent 5 is arranged on above bag Ce Dai district of district filter.
Also comprise pressure relief device 6, urgent nitrogen fill valve 7, ash-discharging device and PLC control system 8 in the present embodiment, described pressure relief device 6 and urgent nitrogen fill valve 7 are separately positioned on cylindrical shell 1 top, and described ash-discharging device is arranged on bottom flue-dust retainer 3.
Concrete, the present embodiment Zhong electricity district filter comprises air distribution plate I 8, the DC high-voltage power supply 9 be arranged on cylindrical shell 1 sidewall, the positive plate 10 that is crisscross arranged and cathode line 11, anode vibration body 12 and cathode rapping mechanism 13 for vibration dust-cleaning, described air distribution plate I 8 is arranged on above positive plate 10 and cathode line 11.
The present embodiment Zhong Dai district filter comprises card 14, filter bag 15, cage 16, air distribution plate II 17 and deashing device, described card 14 is fixed on cylindrical shell 1 with on dividing plate 2, described filter bag 15 and cage 16 are arranged on card 14, and described air distribution plate II 17 is arranged on below filter bag 15 and cage 16; Described deashing device forms primarily of Venturi tube 18 and blowing device 21, and described Venturi tube 18 is arranged on cage 16 upper end, and described blowing device 21 is arranged on above Venturi tube 18.
In the present embodiment, electric district filter and bag district filter are separately positioned on the middle part of cylindrical shell 1, form the cavity with a constant volume, via the separation of dividing plate 2, form the inlet plenum 19 of side, electric district and the discharge chamber 20 of side, bag district respectively between cylindrical shell 1 top.After dusty gas enters inlet plenum 19 from gas feed 4, after being uniformly distributed of air distribution plate I 8, enter the electric field region between multiple positive plate 10 from top to bottom; Under the effect of high electric-field intensity, gas ionization produces a large amount of electric charge, when gas is by electric field, electric charge is attached on dust granules, makes dust charged, under the effect of electric field force, Charged shifts to positive plate 10 (dust collecting electrode), realizes first order dedusting.
When dusty gas arrives bottom electric field region, turn back to rising bottom dividing plate 2, enter bag district's filter.In dusty gas uphill process, first by air distribution plate II 17, then enter a bag district uniformly.Under the effect of the sieving of filter bag 15, interception, collision, diffusion and electrostatic attraction, realize second level dedusting.The grit detention of dusty gas is on filter bag 15, and last clean gas enters in discharge chamber 20, discharges from gas vent 5.
Through the first order dust removal process in electric district, the part dust in dusty gas can be removed, and flue-gas temperature is obviously reduced (in process gas, contained high temperature grit carries amount of heat), thus effectively reduce the live load of filter bag 15 and dust granules to the souring of filter bag 15, effectively increase cleaning cycle and life-span of the filter bag.
In the present embodiment, be equipped with deashing device in bag district filter, deashing device forms primarily of Venturi tube 18 and blowing device 21; Wherein, blowing device 21 comprises correspondence and is arranged on some injection tubes 22 above filter bag 15 and nozzle 23, each injection tube 22 is connected with winding-up collector 24, the corresponding pulse valve 25 be provided with for controlling each injection tube 22 flow on winding-up collector 24, and pulse valve 25 is controlled by PLC control system 8; 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.
In the present embodiment, pressure relief device 6 adopts the combination of rupture disk+explosion proof door, effectively can prevent that equipment internal gas pressure is too high causes the security incidents such as blast, and can effective sealing under vacuo, enhances the safety and reliability of equipment.Ash-discharging device comprises discharge valve 26 and vacuum isolating valve 27, and described vacuum isolating valve 27 is arranged between discharge valve 26 and flue-dust retainer 3; Vacuum isolating valve 27 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 15 simultaneously, thus scaling loss filter bag 15.PLC control system 8 comprises material-level detection system 28, system for detecting temperature (grey side thermometer 29, bag side thermometer 30) and differential pressure measuring system 31; Wherein, described material-level detection system 28 can the ash quantity of measuring set ash bucket 3, and described system for detecting temperature can measure the temperature of bag side and grey side, prevents the dust spontaneous combustion of flue gas overtemperature or accumulation from causing filter bag 15 scaling loss; Once overtemperature be detected, PCL control system 8 makes urgent nitrogen fill valve 7 in equipment, be filled with nitrogen by control signal to carry out lowering the temperature and the burning stoping dust.Described differential pressure measuring system 31 can measure pressure reduction before and after filter bag 15, to determine the deashing opportunity of deashing device.
In the present embodiment, for ease of deashing, flue-dust retainer is provided with rapping apparatus 32, meanwhile, is also provided with gear ash-pan 33, to reduce the reentrainment of dust caused due to gas shock in flue-dust retainer 3.
In the present embodiment, cylindrical shell 1 is cylindrical, flue-dust retainer 3 is inversed taper platform shape, and cylindrical shell 1 and flue-dust retainer 3 outer wall place are provided with reinforcement, can guarantee that apparatus casing is indeformable under high vacuum state.
In the present embodiment, cathode rapping mechanism 13, the anode vibration body 12 of electric district filter adopt vacuum seal axle sleeve 34 to be connected with cylindrical shell 1 junction, can guarantee No leakage under vaccum working condition.
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 (6)
1. liquid steel refining dry vacuum system electricity consumption-bag integral filter, it is characterized in that: comprise cylindrical shell, dividing plate cylindrical shell being separated into electric district and bag district is provided with in described cylindrical shell, flue-dust retainer is arranged on cylinder body bottom and is connected with cylindrical shell, electric region filter is established in the side, electric district of described cylindrical shell, bag district's filter is provided with in the side, bag district of described cylindrical shell, the gas feed of described cylindrical shell is arranged on above electric district Ce electricity district filter, and gas vent is arranged on above bag Ce Dai district of district filter.
2. liquid steel refining dry vacuum system electricity consumption-bag integral filter according to claim 1, it is characterized in that: also comprise pressure relief device, urgent nitrogen fill valve, ash-discharging device and PLC control system, described pressure relief device 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 electricity consumption-bag integral filter according to claim 1, it is characterized in that: described electric district filter comprises air distribution plate I, the DC high-voltage power supply be arranged on cylinder lateral wall, the positive plate be crisscross arranged and cathode line, for the anode vibration body of vibration dust-cleaning and cathode rapping mechanism, described air distribution plate I is arranged on above positive plate and cathode line.
4. liquid steel refining dry vacuum system electricity consumption-bag integral filter according to claim 1, it is characterized in that: described bag district filter comprises card, filter bag, cage, air distribution plate II and deashing device, described card is fixed on cylindrical shell and dividing plate, described filter bag and cage are arranged on card, and described air distribution plate II is arranged on below filter bag and cage; Described deashing device is primarily of Venturi tube and blowing device composition, and described Venturi tube is arranged on cage upper end, and described blowing device is arranged on above Venturi tube.
5. liquid steel refining dry vacuum system electricity consumption-bag integral filter according to claim 1, is characterized in that: described flue-dust retainer is provided with rapping apparatus.
6. liquid steel refining dry vacuum system electricity consumption-bag integral filter according to claim 5, 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 |
|---|---|---|---|
| CN201420813335.0U CN204337962U (en) | 2014-12-19 | 2014-12-19 | Liquid steel refining dry vacuum system electricity consumption-bag integral filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420813335.0U CN204337962U (en) | 2014-12-19 | 2014-12-19 | Liquid steel refining dry vacuum system electricity consumption-bag integral filter |
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| Publication Number | Publication Date |
|---|---|
| CN204337962U true CN204337962U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420813335.0U Expired - Fee Related CN204337962U (en) | 2014-12-19 | 2014-12-19 | Liquid steel refining dry vacuum system electricity consumption-bag integral filter |
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| CN (1) | CN204337962U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107315A (en) * | 2015-07-09 | 2015-12-02 | 邯郸学院 | Control method of two-voltage two-bag deduster |
| CN105363288A (en) * | 2015-11-25 | 2016-03-02 | 吕珩 | Mixed dust removal device |
-
2014
- 2014-12-19 CN CN201420813335.0U patent/CN204337962U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107315A (en) * | 2015-07-09 | 2015-12-02 | 邯郸学院 | Control method of two-voltage two-bag deduster |
| CN105363288A (en) * | 2015-11-25 | 2016-03-02 | 吕珩 | Mixed dust removal device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20211219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |