CN204018023U - A kind of electric cleaner high-efficiency dust collecting and deashing device - Google Patents
A kind of electric cleaner high-efficiency dust collecting and deashing device Download PDFInfo
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- CN204018023U CN204018023U CN201420323510.8U CN201420323510U CN204018023U CN 204018023 U CN204018023 U CN 204018023U CN 201420323510 U CN201420323510 U CN 201420323510U CN 204018023 U CN204018023 U CN 204018023U
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Abstract
The utility model relates to a kind of electric cleaner high-efficiency dust collecting and deashing device for boiler smoke dedusting, comprise electric cleaner housing, HVDC power supply, the electrostatic field being formed by positive plate and cathode line, it is characterized in that HVDC power supply is the high-frequency and high-voltage power supply with soft steady characteristic, electric field inner anode plate afterbody is provided with U-shaped conduction frid and is electrically connected with positive machine plate, and electric cleaner case top is provided with sound wave ash cleaner.The soft voltage-stabilizing power supply of high-frequency and high-voltage has increased corona discharge power, saves energy resource consumption.U-shaped conduction frid increases specific collection area, improves the ability of gathering dust.Sound wave ashing ensures that pole plate is clean, has improved efficiency of dust collection.
Description
Technical field
The utility model relates to a kind of electric cleaner high-efficiency dust collecting and deashing device for boiler smoke dedusting.
Background technology
At present, industrial dedusting field adopts electric cleaner in a large number, and particularly processing, the reduction of discharging to dust at the tail flue gas of station boiler become the key content of state control atmosphere pollution.Existing electric cleaner is simple in structure, has multiple electric field series connection in electric cleaner, is provided with positive plate and is connected with the output of high-voltage DC power supply with cathode line in each electric field, forms electrostatic field.After dust Beijing electrostatic field in flue gas is charged, reached the object of dedusting by positive plate trapping.In positive plate and cathode line, be separately installed with rapping apparatus, for the dust of trapping and adhesion is shaken and falls the ash bucket of electric cleaner bottom.
At present, most of electric cleaner adopts traditional power frequency high voltage DC power supply.Traditional power frequency high voltage DC power output voltage fluctuation is large, easily produces Spark Discharges.Corona discharge is the duty of electric cleaner the best, and spark discharge is charged invalid to exhaust gas dust, not only causes consuming a large amount of electric energy, and electrode is produced to ablation, causes corona discharge effect to decline and dust-collecting efficiency reduction.
In addition, ensure the clean of positive plate and cathode line surface, very important for the dust removing effects of electric cleaner.Electric precipitation adopts anode rapping and cathode rapping device to remove the laying dust on positive plate and cathode line surface, poor effect at present.This is to be on the increase and to cause himself mass penalty due to electric precipitation body pole plate polar curve dust, and the acceleration of rapping diminishes and decay very fast, and ash-removal effect constantly worsens, and causes dust emission to exceed standard.Conventionally need to move after a period of time at electric cleaner, shut down and carry out artificial deashing.Shut down the normal operation that affects power plant, can not ensure the real time cleaning degree of electrode.
Electric cleaner is collected dust by anode, and because flue gas flow rate is very fast, under the effect of smoke gas flow, some Charged can depart from the effect of electrostatic field escapes, and causes electric cleaner outlet dust emission index to be difficult to up to standard.
Utility model content
The purpose of this utility model is to provide a kind of electric cleaner high-efficiency dust collecting and deashing device, and in solution prior art, power supply energy consumption is large, and positive plate and cathode line laying dust can not be implemented the problem of removing and Charged is escaped.
The utility model is realized realization like this:
A kind of electric cleaner high-efficiency dust collecting and deashing device, comprise electric cleaner housing, HVDC power supply, the electrostatic field being formed by positive plate and cathode line, it is characterized in that HVDC power supply is the high-frequency and high-voltage power supply with soft steady characteristic, electric field inner anode plate afterbody is provided with U-shaped conduction frid and is electrically connected with positive machine plate, and electric cleaner case top is provided with sound wave ash cleaner.
Preferably, described electric cleaner high-efficiency dust collecting and deashing device, is characterized in that the groove width of U-shaped conduction frid is greater than the thickness of positive plate, and length is consistent with positive plate height, U-shaped conductive trough board slot mouth and positive plate are installed in parallel in the afterbody of positive plate, and its notch regards to positive plate.
Preferably, described electric cleaner high-efficiency dust collecting and deashing device, is characterized in that sound wave ash cleaner is arranged on the position of electric cleaner case top between positive plate and cathode line.
The utility model adopts the soft voltage-stabilizing power supply of high-frequency and high-voltage as power supply.The soft voltage-stabilizing power supply of high-frequency and high-voltage is a kind of novel power supply based on high-frequency and high-voltage switching technique, is mainly made up of industrial frequency rectifying filtering, resonance inversion circuit and high frequency high voltage step-up rectification output and power-supply controller of electric.The soft voltage-stabilizing power supply of high-frequency and high-voltage is in the time of pure direct current supply mode, and voltage pulsation is little, and corona voltage is high, and corona current is large, and has adjustable constant-flow source characteristic, thereby has increased corona discharge power, has fundamentally solved the charged inefficient difficult problem of flue dust, has improved efficiency of dust collection.
The utility model is provided with U-shaped conduction frid at positive plate afterbody.U-shaped conduction frid can improve than dust-collecting area, and the dust that the most effectively trapping is escaped along dust collection plate surface, significantly improves electric cleaner dust-collecting efficiency and resistance does not change.Charged is mainly subject to the effect of electric field force with the air-flow of parallel dust collection plate face on vertical dust collection plate surface, its resultant direction is just in time pointed to filter pocket import department, because dust is electronegative, and U-shaped conduction frid is anodal, therefore can effectively trap and filter the dust of escape, and there will not be secondary flying ash phenomenon.The function of the existing Electrostatic dust of U-shaped conduction frid also has the effect of interception Chalk-dust filtering, not only can improve specific collection area, also can play the effect of airflow uniform distribution in electric field simultaneously.The installation of U-shaped conduction frid, had both kept conventional electric cleaner stable and reliable operation, long service life and the little feature of resistance, had rationally used for reference again sack cleaner Chalk-dust filtering mechanism, and its dust collection effect improves greatly.
The utility model is provided with sound wave ash cleaner and can sends the sound wave of low frequency, high energy in electric cleaner case top, amplify by public address cylinder, by air dielectric, acoustic energy is delivered to corresponding dust stratification point, directly act in the molecular structure of dust, make the intermolecular power of gathering of dust loose from closely becoming, under the effect of gravity or fluid media (medium) media, depart from attachment surface, reach the object of effective deashing.Acoustic wave soot blower can effectively be removed electric cleaner pole plate, polar curve dust stratification after installing, and makes up the hypodynamic defect of former top rapping, obviously improves the clean-up performance of Electrode, polar curve.After use, electric duster ash bucket is received ash amount meeting showed increased, and dust collection efficiency obviously improves; replace the artificial deashing of electric field, improve the bad condition of work of the long-term artificial deashing of electric field, avoid shutting down the loss that maintenance causes; reduce labor intensity, save human and material resources, reduce maintenance cost.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be done to simple introduction below, obviously, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to this lower accompanying drawing other accompanying drawing.
Fig. 1 is the utility model is installed the soft voltage-stabilizing power supply of high-frequency and high-voltage, U-shaped conduction frid harmony ripple deashing device structural configuration schematic diagram at certain electric field of electric cleaner, and this figure is the schematic top plan view of electric cleaner electric field.
In figure:
1, U-shaped conduction frid; 2, anode rapping; 3, positive plate; 4, cathode line row; 5, sound wave ash cleaner; 6, cathode rapping; 7, the soft voltage-stabilizing power supply of high-frequency and high-voltage.
Detailed description of the invention
Understand for technical characterictic of the present utility model, object and effect being had more clearly; in conjunction with case study on implementation; to being further detailed for a kind of electric cleaner high-efficiency dust collecting and deashing device, not determinate, do not limit the protection domain of this utility patent with following case study on implementation.
Embodiment 1
The utility model proposes a kind of electric cleaner high-efficiency dust collecting and deashing device.Be illustrated in figure 1 the utility model the structural configuration schematic diagram of the soft voltage-stabilizing power supply of high-frequency and high-voltage, U-shaped conduction frid harmony ripple deashing device is installed at certain electric field of electric cleaner, this figure is the schematic top plan view of electric cleaner electric field.
Certain electric cleaner is two chambers four electric fields, and each electric field divides community power supply, the soft voltage-stabilizing power supply of high-frequency and high-voltage that each electric field high-voltage suppling power capacity of being respectively is 1.4A/72kV.Can carry out centralized Control operation to four electric fields with host computer, also can carry out control operation at local control box and high-voltage board.After the soft voltage-stabilizing power supply of high-frequency and high-voltage is installed, except for to each electric field power supply, also can coordinate to control to auxiliary equipment such as the whole rapping apparatus of electric precipitation and heaters.After the soft voltage-stabilizing power supply of high-frequency and high-voltage is installed, all and the port lid that should guarantee to touch electric device all have safety-interlock measure with related electric device.All access doors on electric cleaner body have reliable interlocking means with the Men Junyu high voltage power supply that leads to deduster high voltage electric equipment, only in the situation that power supply is cut off and eliminate residual charge, just can enter deduster inside, to ensure personal safety.
The soft voltage-stabilizing power supply equipment of high-frequency and high-voltage installation site: electric cleaner respective electric field top.
The soft voltage-stabilizing power supply important technological parameters of high-frequency and high-voltage: rated voltage: three-phase AC372V; Rated frequency: 50Hz ± 5Hz; Rated current: be less than or equal to 172A; Rated power: be more than or equal to 72KW; Power supply conversion efficiency: be greater than 95% under nominal load condition; Power factor: be greater than 0.92 under rated output voltage, current condition;
Sound wave ash cleaner is arranged on the position of electric cleaner case top between positive plate and cathode line.The principal element that installation acoustic wave soot blower should be considered has: the scope of sound wave effect; The volume of deduster, structure, electric field height; Frequency, the sound intensity that heterogeneity dust is required.Correct installation site is the most important to effective operation of acoustic wave soot blower, and it will directly affect the scope of acoustic irradiation and the efficiency that sound wave transmits, thereby has influence on the actual effect of deashing.
The dust stratification of different parts, not the dust stratification of same electric field with working condition as humidity size, have or not the situation differences such as electric field force existence, all there is different adhesions, to effectively remove these dust stratifications from its attachment surface, need to and comprehensively determine installation site, the quantity of acoustic wave soot blower apart from the distance of sound source and the attenuation characteristic of sound wave according to the design feature of the required sound pressure level of deashing object solstics deashing and propagation medium working condition, action space, and design corresponding operating frequency.Core in whole system is acoustic energy device, and it is the effectively indispensable part of work of guarantee system, and low frequency, high energy sound wave that it produces are amplified into by clear device interior via humorous vibration cylinder.Gas circuit centralized control system is the important component part that ensures the normal work of acoustic energy device, and wherein, magnetic valve is again the major control executive component in whole soot cleaning system.Every acoustic wave soot blower is furnished with installation sleeve, on-the-spot the hot top board of electric cleaner is left to circular hole Ф 440mm, by installation sleeve and deduster top board firm welding, connects with bolt after will the insertion of public address cylinder.Cold roof plate is opened circular hole Ф 150mm, acoustic energy device and public address cylinder is fixing after, after will water proof ring welding with cold roof plate, make encapsulation process.
U-shaped conduction frid is arranged on positive plate afterbody, and the groove width of U-shaped conduction frid is greater than the thickness of positive plate, and length is consistent with positive plate height, and U-shaped conductive trough board slot mouth and positive plate are installed in parallel in the afterbody of positive plate, and its notch regards to positive plate.U-shaped conduction frid can effectively trap the dust of escaping along dust collection plate surface, electric cleaner dust-collecting efficiency is significantly improved and resistance does not change.Charged is mainly subject to the effect of electric field force with the air-flow of parallel dust collection plate face on vertical dust collection plate surface, its resultant direction is just in time pointed to U-shaped conduction frid import department, because dust is electronegative, and U-shaped conduction frid is anodal, therefore U-shaped conduction frid can effectively trap and filter the dust entering, and there will not be secondary smoke phenomenon, the function of its existing Electrostatic dust also has the effect of interception Chalk-dust filtering, and can improve specific collection area more than 25%, also can play the effect of airflow uniform distribution in electric field simultaneously.The electric cleaner of U-shaped conduction frid is installed, both conventional electric cleaner stable and reliable operation, long service life and the little feature of resistance had been kept, rationally used for reference again the efficient of sack cleaner Chalk-dust filtering mechanism, its economic and technical norms are obviously better than all kinds of conventional dedusters.
Embodiment 2
Certain 660MW of power plant unit, join two two chambers four electric-field dust collectors, single-phase silicon rectifier high-voltage power-supply unit and 4 cover high-frequency high-voltage source devices are overlapped in every former outfit 6 of deduster, two, the single-phase silicon commutating power supply specification of three electric fields is GGYAJ02-2.2A/72kV, and the single-phase silicon commutating power supply specification of four electric fields is GGAJ02-2.4A/72kV.Outlet concentration of emission is 80mg/Nm
3left and right is 88.1m than dust-collecting area
2/ m
3/ sec, effective cross sectional area 546m
2, body resistance ﹤ 249Pa, body air leak rate of air curtain ﹤ 2.5%, effective cross sectional area 546m
2, positive plate form and total effective area BE plate/108847m
2, cathode line form and the perverse line of total length pin, wave molding 211753m, migration velocity 6.8cm/sce, flue gas flow rate 1.13m/sce.
This unit carries out energy saving and efficiency increasing transformation, and each electric field is replaced with after the soft voltage-stabilizing power supply of 1.4A/72KV high frequency, and plate current density is promoted to 0.35mA/m
2, both avoided possible anti-corona, more favourable to the trapping of fine solid particle again.Significantly improve the dust removing effects of electric cleaner,
Three, four electric fields, every electric field fills 48 cover sound wave ash removers, and every 75Hz type acoustic wave soot blower is furnished with installation sleeve, on-the-spot the hot top board of electric cleaner is left to circular hole Ф 440mm, by installation sleeve and deduster top board firm welding, connects with bolt after will the insertion of public address cylinder.Cold roof plate is opened circular hole Ф 150mm, acoustic energy device and public address cylinder is fixing after, after will water proof ring welding with cold roof plate, make encapsulation process.Electric precipitation production efficiency is greatly improved, and not only the normal operation of electric cleaner obtains Reliable guarantee, and has effectively ensured the normal operation of boiler unit.
U-shaped conduction frid is installed on three or four electric field positive plate ends, and each U-shaped conduction frid is matrix, concave positive face button antianode plate, and the U-shaped conduction frid width of positive antianode plate is 300mm, and matrix both sides are respectively 160mm, are highly 15m, and sheet metal thickness is 3mm.U-shaped conduction frid can improve specific collection area, can trap again, tackle Charged, also can play the effect of airflow uniform distribution in electric field simultaneously.
Deduster actual entry concentration is 42g/Nm
3left and right, outlet concentration of emission is 80mg/Nm
3left and right.Adopt after the utility model device, electric precipitation outlet dust emission concentration can be down to 30mg/Nm
3below.
The foregoing is only the schematic detailed description of the invention of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the amendment under the prerequisite of design of the present utility model and principle, done, all should belong to the scope of the utility model protection.
Claims (3)
1. an electric cleaner high-efficiency dust collecting and deashing device, comprise electric cleaner housing, HVDC power supply, the electrostatic field being formed by positive plate and cathode line, it is characterized in that HVDC power supply is the high-frequency and high-voltage power supply with soft steady characteristic, electric field inner anode plate afterbody is provided with U-shaped conduction frid and is electrically connected with prototype board, and electric cleaner case top is provided with sound wave ash cleaner.
2. electric cleaner high-efficiency dust collecting and deashing device described in claim 1, it is characterized in that the groove width of U-shaped conduction frid is greater than the thickness of positive plate, length is consistent with positive plate height, and U-shaped conductive trough board slot mouth and positive plate are installed in parallel in the afterbody of positive plate, and its notch regards to positive plate.
3. electric cleaner high-efficiency dust collecting and deashing device described in claim 2, is characterized in that sound wave ash cleaner is arranged on the position of electric cleaner case top between positive plate and cathode line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323510.8U CN204018023U (en) | 2014-06-17 | 2014-06-17 | A kind of electric cleaner high-efficiency dust collecting and deashing device |
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|---|---|---|---|
| CN201420323510.8U CN204018023U (en) | 2014-06-17 | 2014-06-17 | A kind of electric cleaner high-efficiency dust collecting and deashing device |
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| CN204018023U true CN204018023U (en) | 2014-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020083143A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | System and method for removing dust from intake airflow of engine |
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- 2014-06-17 CN CN201420323510.8U patent/CN204018023U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020083143A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | System and method for removing dust from intake airflow of engine |
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