CN104190543A - Wet-type electric precipitator and electric precipitation desulfurization device comprising same - Google Patents
Wet-type electric precipitator and electric precipitation desulfurization device comprising same Download PDFInfo
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- CN104190543A CN104190543A CN201410410145.9A CN201410410145A CN104190543A CN 104190543 A CN104190543 A CN 104190543A CN 201410410145 A CN201410410145 A CN 201410410145A CN 104190543 A CN104190543 A CN 104190543A
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Abstract
The invention discloses a wet-type electric precipitator and an electric precipitation desulfurization device comprising the same. The wet-type electric precipitator comprises anode plates, cathode rays, two cathode ray suspension frames, an insulator chamber and a cleaning water pipe, wherein multiple bending plates which extend along the vertical direction and are arranged in parallel are used as the anode plates; the multiple cathode rays are suspended between two adjacent bending plates and are bent in tendency the same as that of the bending plates; multiple barbs are fixed on each cathode ray at intervals; the two cathode ray suspension frames are respectively positioned above and below the anode plates and are used for fixing the top ends and bottom ends of the cathode rays; the insulator chamber is used for fixing the ends of the two cathode ray suspension frames; and the cleaning water pipe is arranged above the anode plates. The wet-type electric precipitator disclosed by the invention is used in the desulfurization device, is arranged between two-stage demisting layers in a desulfurization tower and is used for performing fine dust removal on flue gas subjected to primary demisting.
Description
Technical field
The present invention relates to air pollution control technique field, the electric precipitation desulfurizer that is specifically related to a kind of wet electrical dust precipitator and comprise this wet electrical dust precipitator, for after desulfurization, can remove dust PM2.5 in flue gas and the novel wet electrical dust precipitator of steam, be applicable to the flue gas ash removal field of station boiler, Industrial Boiler, incinerator etc.
Background technology
Along with the Environment Pollution Event taking " haze " as principal mode constantly occurs, dust emission accounts for more than 70% coal-burning power plant of total amount and becomes the target of everyone.Although new " fossil-fuel power plant atmospheric pollutant emission standard (GB13223-2011) " promulgating is just controlled at 20mg/Nm by the dust emission concentration of coal-burning power plant
3, the emission request of natural gas has been mentioned to 5mg/Nm
3but ground, some areas coal-burning power plant has also proposed to carry out according to Natural gas standard the requirement of dust Control.
The dedusting technology generally using at present can only be processed the above dust of PM10 mostly, and below PM10, particularly the removal efficiency of PM2.5 sharply declines.In addition, though wet desulphurization has certain dust removing effects (30%～50%) in the time that dust concentration is higher, but the power plant that dropped in a large number Wet Flue Gas Desulfurization Technique represent, in the time that deduster outlet dust concentration is lower, wet desulphurization makes dust emission concentration increase to some extent on the contrary.Therefore, want only to reach 5mg/Nm by transforming former deduster equipment
3discharge standard, obviously unrealistic." PM2.5 " in air quality index is the ultra-fine grain that particle diameter equals and be less than 2.5 μ m, can further be sucked alveolar, enters painstaking effort system, even brings out cancer, serious harm health.The fine solid, liquid particle of this class is also " arch-criminal " who forms haze weather.
Wet electrical dust precipitator has the function that traps fine dust, all very desirable to the trapping effect of fine, moist, stickiness or high resistivity dust.There is not flying upward again after dust collection in wet electrical dust precipitator, this is due to the result that has adhesion between the dust being captured and water.Because wet electrical dust precipitator can provide the corona discharge power times over dry electric precipitation device, this has just improved the arresting efficiency to PM2.5 greatly, and wet electrical dust precipitator, by the cooling reduction flue-gas temperature of convection current, promotion condensation, also can trap acid mist.
Wet cottrell generally includes following process: 1) to ionization pole (negative electrode) charging, dissociation ambient gas, produces corona; 2) particle in air-flow, by charged, under electric field action, is shifted to the dust collecting electrode (positive pole) of ground connection; 3) particle is collected accumulation in dust collecting electrode; 4) water rinses dust collecting electrode, removes the particle of collecting.
But traditional wet cottrell exists following not enough: 1) air-flow, at each interelectrode skewness, even has " dead angle ", has reduced efficiency of seizing dust.2) traditional plate electrode, wire electrode, the corona insufficient strength of rod-shaped electrode is high, must obtain high dust removing rate and prevent arc extinguishing impact by improving voltage, obtains high dust removing rate and prevents arc extinguishing impact.3) traditional circular electrode pipe has and is difficult to accurately keep concentric problem, makes electric field inhomogeneous, easily causes frequent electric spark, affects entirety and catches dirt effect.4) purified gas and flushing waste water are discharged from same outlet at equidirectional, easily cause purified gas to carry dirty waste water, have seriously reduced purification efficiency.Therefore be badly in need of a kind of novel wet electrical dust precipitator.
Summary of the invention
The problem existing for solving wet electrostatic precipitation equipment, the electric precipitation desulfurizer that the invention provides a kind of wet electrical dust precipitator and comprise this wet electrical dust precipitator.
A kind of wet electrical dust precipitator, comprising:
Positive plate, this positive plate is that some edges are vertically to the bending plate that extends and mutually walk abreast and arrange;
Cathode line, is set to some, and hangs between adjacent two bending plates, bends with same trend with described bending plate, and in every cathode line, several prickles are fixed at interval;
Two cathode line hanging frames, lay respectively at the above and below of described positive plate, for top and the bottom of fixed negative pole line;
Insulator chamber, for the termination of fixing described two cathode line hanging frames;
Clean water pipe, be installed on the top of described positive plate.
The bending form of described bending plate can adopt the multiple bending forms such as regular bending, irregular bending.As preferably, the length of described bending plate is 2～8m, and the distance between two folding lines is 300mm～800mm, and the angle of bending part is 140 °～170 °.
Further preferably, the spacing between adjacent two bending plates is 280mm～400mm.
Flap electric cleaner of the present invention, flue gas is flowing and increased the disorderly degree of the air-flow between plate between flap, under the effect of electric field, dust droplet SO
3aerosol heavy metal etc. is more easily adsorbed on positive plate, is washed away by the moisture film on positive plate, can realize mercury, heavy metal and PM2.5 ultra-fine grain etc. and remove combining of multiple pollutant.
Simultaneously flap electric cleaner, has strengthened the intensity of positive plate, and what make that positive plate installs is more stable, has reduced the probability that electric spark produces; In the case of the wet electrical dust precipitator of same volume, flap wet electrical dust precipitator has larger ratio area, just can reach higher dust removing effects under lower discharge voltage, has saved the energy, reduces the height of desulfurizing tower.
Show by a large amount of experimental results, bending plate is under the combination of above-mentioned preferred parameter, and the effect of bending plate performs to maximum.
Further preferred, the length of described bending plate is 8m, and the distance between two folding lines is 300mm, and the angle of bending part is 140 °; Spacing between adjacent two bending plates is 280mm.(corresponding embodiment 1, the result of embodiment 1 is relatively best)
When in cathode line, prickle makes cathode line electric discharge, current density is even, more easily on prickle, discharges a large amount of electronics, when dust passes through high voltage electric field, makes grit charged, and under the effect of electric field force, grit is deposited on collecting plate.As preferably, the length of described prickle is 5～25mm, and in every cathode line, the spacing of adjacent prickle is 50～150mm.Under this arranges condition, the effect of prickle performs to better.
For the effect that makes prickle further performs to maximum, to learn still more preferably by great many of experiments, the length of described prickle is 25cm, in every cathode line, the spacing of adjacent prickle is 50mm.(corresponding embodiment 1, the result of embodiment 1 is relatively best)
Under the prerequisite that is 280mm～400mm in the spacing between adjacent two bending plates, further preferred, the setting space of the some cathode line between adjacent two bending plates is 250mm～500mm.
Under this preferably arranges, the effect of cooperatively interacting between positive plate and minus plate reaches optimum state.
Further preferred, under the prerequisite that is 280mm in the spacing between adjacent two bending plates, the setting space of the some cathode line between adjacent two bending plates is 250mm; In cathode line, the length of prickle is 25cm, and in every cathode line, the spacing of adjacent prickle is 500mm.
Under this condition, the synergy between positive plate, minus plate and prickle reaches best effect.
As preferably, between adjacent two bending plates, be also provided with the stationary pipes for fixing described cathode line.Prevent rocking of cathode line.Stationary pipes preferably with the same caliber of cathode line.
As preferably, described cleaning water pipe is arranged in the both sides at every bending plate top, is close to two faces of corresponding bending plate; Further preferably, the nozzle spacing on described cleaning water pipe is 50～70mm, and the spray angle of spray orifice becomes 30 °～60 ° angles with corresponding bending plate.
Install and clean water pipe according to above-mentioned optimal way, when wet electrical dust precipitator operation, the moisture film that is distributing uniformly and flowing downward always on whole positive plate, when electric cleaner operation, adsorbing powder dust is to positive plate, can, along with moisture film is flushed away, can not cause adsorbing powder dust on positive plate, to cause the phenomenon of positive plate fouling.
Described insulator chamber can adopt conventional commercially available prod, and as preferably, described insulator chamber is arranged electrical heating and temperature element.Prevent that cold-starting dewfall is creepage.
Wet electrical dust precipitator of the present invention is preferably applied in wet type desulfurizing tower, while being applied in desulfurizing tower, directly by upper and lower cathode line hanging frame and insulator chamber and positive plate, wet electrical dust precipitator is arranged on the inwall of desulfurizing tower.While independently use as need, at wet electrical dust precipitator of the present invention, housing is set outward, is fixed on the inwall of housing by upper and lower cathode line hanging frame, insulator chamber and positive plate.
The present invention also provides a kind of wet-esp desulfurizer that comprises described wet electrical dust precipitator, comprises desulfurizing tower, is provided with successively from the bottom to top slurry pool, desulfurization spraying layer, one-level demist layer and secondary demist layer in desulfurizing tower; Also comprise, be arranged on the described wet electrical dust precipitator between described one-level demist layer and secondary demist layer; Collecting tank between wet electrical dust precipitator and one-level demist layer; And to be positioned at desulfurizing tower be outward the power supply of wet electrical dust precipitator power supply.
The operating voltage of power supply is 30KV～72KV, and form of power is power frequency supply or high frequency electric source.
In desulfurizer of the present invention, any scheme that described wet electrical dust precipitator is wet electrical dust precipitator of the present invention.
Flue gas in absorption tower after the desulfurization of desulfurization spraying layer through the thick demist of one-level demist layer, then flue gas is through wet electrical dust precipitator essence dedusting demist, then through the further demist of secondary demister, finally discharges by direct exhaust chimney.
Desulfurizer of the present invention adopts wet electrical dust precipitator of the present invention, and flue gas is flowing and increased the disorderly degree of the air-flow between plate between flap, under the effect of electric field, and dust droplet SO
3aerosol heavy metal etc. is more easily adsorbed on positive plate, is washed away by the moisture film on positive plate, can realize mercury, heavy metal and PM2.5 ultra-fine grain etc. and remove combining of multiple pollutant.Purified gas and flushing waste water are in the opposite direction discharged, and have stopped purified gas and have carried dirty waste water, have further improved the dust pelletizing system efficiency of desulfurizing tower, have reduced desulfurizing tower outlet dust emission concentration, reduce chimney corrosion, have reached the up-to-date discharge standard of national requirements.
Adopt wet electrical dust precipitator of the present invention to get and can remove ultra-fine grain, therefore can solve gypsum rain problem; Wet electrical dust precipitator is positioned at desulfurizing tower, and desulfurizing tower integral arrangement, forms apparatus integration, saves floor space.
The present invention sets up collecting tank between demister and wet electrical dust precipitator, after the flushing water of collecting tank collection wet electrical dust precipitator, recycle, ensure that wet electrical dust precipitator flushing water does not directly enter in the desulfurization slurry of desulfurizing tower, has ensured the water balance of whole system.
As preferably, be also provided with the cleaning spraying layer between wet electrical dust precipitator and secondary demist layer;
For further improving the service life of desulfurized effect the wet electric cleaner of prolongation, alkali lye spray facility is set above wet electrical dust precipitator, cleaning fluid after alkali lye spray liquid and dedusting is collected and is entered cleaning water tank by collecting tank, utilizes flushing water pump and cleaning reuse pump to get in the cleaning water pipe that cleans spraying layer, wet electrical dust precipitator and recycles.
For better completing the desulfurization processing to flue gas, be also provided with the corollary equipment supporting with described desulfurizer, comprising:
Alkali liquid tank;
Filtering-depositing tank, described collecting tank is connected to this filtering-depositing tank;
Washwater tank, the water inlet of this washwater tank connects filtering settling pond, alkali liquid tank and technique water pipe, and outlet is connected to the cleaning water pipe of described cleaning spraying layer and wet electrical dust precipitator by scavenging pump;
Oxidation fan, is connected to the slurry pool of desulfurizing tower.
The pipeline that connects described alkali liquid tank and washwater tank is provided with measuring pump.
Flue gas in absorption tower after spraying layer desulfurization through the thick demist of one-level deflection plate demister, then enter and clean the dedusting of the spraying layer degree of depth, the flue gas after dedusting is through the demist of wet electric cleaner essence, then through the further demist of secondary demister, finally discharges by direct exhaust chimney.
Rinse water falls into collecting tank and gravity flow enters filtering-depositing tank buffer memory, and supernatant liquor enters washwater tank by flushing water pump again and cleans reuse pump and return wet electric dust removing system and reuse.Add alkali lye to regulate pH value to alkalescent cleaning in water tank, with in and acid ingredient in flue gas, realize system anticorrosion simultaneously.
The method of carrying out flue gas desulfurization and dedusting by wet-esp desulfurizer of the present invention is as follows:
Flue gas is sent in desulfurizing tower by the gas approach of desulfurizing tower, and flue gas is upwards got rid of by the exhanst gas outlet of desulfurizing tower successively after desulfurization spray, one-level demist, wet-esp and secondary demist;
The slurries that desulfurization spray produces fall in slurry pool, in slurry pool, pass into air, are oxidized; Rinse water in wet-esp process and after wet-esp is collected by collecting tank, and outside desulfurizing tower, cache filter is processed rear reuse and made rinse water.
Brief description of the drawings
Fig. 1 is the structural representation of wet-esp desulfurizer of the present invention.
Fig. 2 is the front view of wet electrical dust precipitator structure of the present invention.
Fig. 3 is the top view of wet electrical dust precipitator structure of the present invention.
Fig. 4 is the scavenge pipe structural representation of wet electrical dust precipitator of the present invention.
Fig. 5 is the anode plate structure schematic diagram of wet electrical dust precipitator of the present invention.
Fig. 6 is the fixing front view of entirety of the cathode line of wet electrical dust precipitator of the present invention.
Fig. 7 is the overall fixation side view of the cathode line of wet electrical dust precipitator of the present invention.
Shown in figure, Reference numeral is as follows:
1-oxidation fan 2-agitating device 3-circulating pump
4-slurry pool 5-desulfurizing tower 6-gas approach
7-desulfurization spraying layer 8-one-level demist layer 9-collecting tank
10-wet electrical dust precipitator 11-cleans spraying layer 12-secondary demist layer
13-exhanst gas outlet 14-measuring pump 15-alkali liquid tank
16-industry water pipe 17-filtering-depositing tank 18-washwater tank
The upper cathode line hanging frame of 19-flushing water pump 20-insulator chamber 21-
22-cathode line 23-prickle 24-cleans water pipe
Cathode line hanging frame 27-spray orifice under 25-positive plate 26-
28-stationary pipes.
Detailed description of the invention
A kind of wet electrical dust precipitator, structure as shown in Fig. 2～6, comprise positive plate, be arranged at cathode line between positive plate, for the cathode line hanging frame of fixed negative pole line, be arranged at prickle in cathode line and the insulator chamber for fixed negative pole line hanging frame.
Positive plate 25 is the some parallel bending plates that arrange mutually, every bending plate edge is vertically to extension, the length of every bending plate is 2～8m, distance between two folding lines is 300mm～800mm, and the angle of bending part is 140 °～170 °, and the spacing between adjacent two bending plates is 280mm～400mm, the bending form of bending plate can adopt the multiple bending forms such as regular bending, irregular bending, and the structure of bending plate can be as any form in Fig. 5.
Clean water pipe 24 one of the each installation in the both sides, top of every bending plate, clean the both sides that water pipe 24 is arranged in every bending plate top, be close to two faces of bending plate, clean on water pipe some spray orifices 27 are set, nozzle spacing is 50～70mm, the spray angle of spray orifice becomes 30 °～60 ° angles with corresponding bending plate, cleans the structural representation of water pipe as shown in Figure 4.
Cathode line 22 is arranged between adjacent two bending plates, cathode line between every adjacent two bending plates is one group, every group of cathode line is some parallel settings, every cathode line all has the bending trend identical with bending plate (it is identical with angle and the length of positive plate bending that the angle of bending becomes with length), in every cathode line, several prickles are fixed at interval, the length of each prickle is 5～25mm, in every cathode line, the spacing of adjacent prickle is 50～150mm, and the spacing in every group of cathode line between adjacent cathode line is 250mm～500mm.
Cathode line hanging frame 21 and lower cathode line hanging frame 26 are set respectively in the above and below of positive plate, the top and bottom of all cathode line are separately fixed on corresponding cathode line hanging frame, the termination of upper and lower two cathode line hanging frames is each fixes an insulator chamber 20, for whole wet electrical dust precipitator is installed.
Rock for preventing cathode line, between adjacent two bending plates, be also provided with some stationary pipes 28 that cross with cathode line, cathode line and stationary pipes 28 intersections and stationary pipes fix, and the external diameter of stationary pipes is identical with the external diameter of cathode line, and the mounting means of cathode line and stationary pipes as shown in Figure 6 and Figure 7.
When this wet electrical dust precipitator independently uses, also comprise a cylindrical shell, positive plate 25 is fixed on the inwall of cylindrical shell with insulator chamber 20, the wet electrical dust precipitator of present embodiment is preferred in desulfurizer, positive plate 25 and insulator chamber 20 are all fixedly installed on the inwall of desulfurizing tower, thereby wet electrical dust precipitator is installed in desulfurizing tower.
The desulfurizer of the wet electrical dust precipitator that comprises present embodiment as shown in Figure 1, comprise desulfurizing tower 5, desulfurizing tower 5 is conventional spray column, in desulfurizing tower 5, set gradually from the bottom to top slurry pool 4, desulfurization spraying layer 7, one-level demist layer 8 and secondary demist layer 12, gas approach 6 is on the tower wall between slurry pool and desulfurization spraying layer, and exhanst gas outlet 13 is positioned at the top of desulfurizing tower 5.
Wet electrical dust precipitator 10 as shown in Fig. 2～7 is arranged between one-level demist layer 8 and secondary demist layer 12, insulator chamber 20 and positive plate 25 are fixed on the tower wall of desulfurizing tower 5, thereby whole wet electrical dust precipitator 10 is installed in desulfurizing tower 5, above wet electrical dust precipitator 10 and be positioned at secondary demist layer 12 below arrange clean spraying layer 11, be used for spraying cleaning wet electrical dust precipitator, the main cathode line of cleaning, below wet electrical dust precipitator 10 and be positioned at one-level demist layer 8 above collecting tank 9 is set, for collecting the cleaning fluid of wet electrical dust precipitator.
In slurry pool 4, be provided with agitating device 2, between slurry pool 4 and desulfurization spraying layer 7, be connected by circulating pump 3.
Desulfurizing tower 5 is outer is arranged at the corollary equipment that desulfurizing tower matches, and comprising: alkali liquid tank 15; Filtering-depositing tank 17, collecting tank 9 is connected to this filtering-depositing tank; Washwater tank 18, the water inlet of this washwater tank connects filtering settling pond 17, alkali liquid tank 15 and technique water pipe 16, and outlet is connected to the cleaning water pipe that cleans spraying layer 11 and wet electrical dust precipitator by scavenging pump 19; Oxidation fan 1 is connected to the slurry pool of desulfurizing tower; The pipeline that connects alkali liquid tank 15 and washwater tank 18 is provided with measuring pump 14; Power supply is arranged on outside desulfurizing tower 5, and for wet electrical dust precipitator 10 is powered, the operating voltage of power supply is 30KV～72KV, and form of power is power frequency supply or high frequency electric source.
It is as follows that above-mentioned desulfurizer carries out the technological process of flue gas desulfurization:
Desulfurization slurry stirs and evenly mixs fully by agitating device 2, and desulfurization slurry is transported to three pull-up sulphur spraying layers 8 by circulating pump 3, and flue gas enters in desulfurizing tower 5 by gas approach 6, the SO in flue gas
2be desulfurized slurries through three layers of spray and absorb in slurries, then desulfurization slurry is blasted to air carry out bubbling through oxidation fan 1.
Flue gas after desulfurization is tentatively removed gypsum slurries droplet by two-layer one-level demist layer 8, continue to rise and carry out dedusting demist by entering wet electrical dust precipitator 10 after collecting tank 9, cleaning spraying layer carries out batch (-type) spray to wet electrical dust precipitator and prevents cathode line fouling, secondary demist layer is removed the water smoke producing while cleaning spraying layer intermittent shower, and flue gas enters exhanst gas outlet 13 after spraying layer 11 and secondary demist layer 12 and enters chimney by cleaning.
Washwater tank 18 is transported to rinse water in the cleaning water pipe that cleans spraying layer and positive plate by flushing water pump 19, in flue gas, the water of absorbed gypsum slurries droplet and cleaning wet electrical dust precipitator is collected and is entered filtering-depositing tank by collecting tank, supernatant liquor enters washwater tank 18, alkali liquid tank 15 is transported to alkali lye washwater tank 18 and regulates the pH value of rinse water through measuring pumps 14, by the liquid level of the fresh water (FW) additional clean water pot 18 in technique water pipe 16.
Embodiment 1
Adopt the wet-esp desulfurizer of above-mentioned self design, the length of the bending plate of wet electrical dust precipitator is 8m, distance between two folding lines is 300mm, the angle of bending part is 140 °, spacing between adjacent two bending plates is 280mm, described prickle length is 25mm, and the spacing of adjacent prickle is 50mm, and the setting space of the some cathode line between adjacent two bending plates is 250mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter wet-esp by blower fan air blast, wet electrical dust precipitator import water smoke content and slurries dust Control, regulation voltage, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Embodiment 2
Adopt the wet-esp desulfurizer of above-mentioned self design, the length of the bending plate of wet electrical dust precipitator is 2m, distance between two folding lines is 800mm, the angle of bending part is 170 °, spacing between adjacent two bending plates is 400mm, described prickle length is 5mm, and the spacing of adjacent prickle is 150mm, and the setting space of the some cathode line between adjacent two bending plates is 500mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter wet-esp by blower fan air blast, wet electrical dust precipitator import water smoke content and slurries dust Control, regulation voltage, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Embodiment 3
Adopt the wet-esp desulfurizer of above-mentioned self design, the length of the bending plate of wet electrical dust precipitator is 4m, distance between two folding lines is 600mm, the angle of bending part is 155 °, spacing between adjacent two bending plates is 350mm, described prickle length is 10mm, and the spacing of adjacent prickle is 100mm, and the setting space of the some cathode line between adjacent two bending plates is 400mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter wet-esp by blower fan air blast, wet electrical dust precipitator import water smoke content and slurries dust Control, regulation voltage, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Embodiment 4
Adopt the wet-esp desulfurizer of above-mentioned self design, the length of the bending plate of wet electrical dust precipitator is 7m, distance between two folding lines is 700mm, the angle of bending part is 160 °, spacing between adjacent two bending plates is 350mm, described prickle length is 15mm, and the spacing of adjacent prickle is 120mm, and the setting space of the some cathode line between adjacent two bending plates is 350mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter wet-esp by blower fan air blast, wet electrical dust precipitator import water smoke content and slurries dust Control, regulation voltage, wet electrical dust precipitator cathode line length, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Comparative example 1
Conventional Wet type electric dust-removing device, the positive plate length of conventional wet electrical dust precipitator is 8m, and the spacing between adjacent two positive plates is 280mm, and prickle length is 25mm, the spacing of adjacent prickle is 50mm, and the setting space of the some cathode line between adjacent anode plate is 250mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter conventional wet-esp by blower fan air blast, measure conventional wet electrical dust precipitator import water smoke content and slurries dust content, regulation voltage, wet electrical dust precipitator cathode line length, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Comparative example 2
Conventional Wet type electric dust-removing device, the positive plate length of conventional wet electrical dust precipitator is 2m, and the spacing between adjacent two positive plates is 400mm, and prickle length is 5mm, the spacing of adjacent prickle is 150mm, and the setting space of the some cathode line between adjacent anode plate is 500mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter conventional wet-esp by blower fan air blast, measure conventional wet electrical dust precipitator import water smoke content and slurries dust content, regulation voltage, wet electrical dust precipitator cathode line length, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Comparative example 3
Conventional Wet type electric dust-removing device, the positive plate length of conventional wet electrical dust precipitator is 4m, and the spacing between adjacent two positive plates is 350mm, and prickle length is 10mm, the spacing of adjacent prickle is 100mm, and the setting space of the some cathode line between adjacent anode plate is 400mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter conventional wet-esp by blower fan air blast, measure conventional wet electrical dust precipitator import water smoke content and slurries dust content, regulation voltage, wet electrical dust precipitator cathode line length, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Comparative example 4
Conventional Wet type electric dust-removing device, the positive plate length of conventional wet electrical dust precipitator is 7m, and the spacing between adjacent two positive plates is 350mm, and prickle length is 15mm, the spacing of adjacent prickle is 120mm, and the setting space of the some cathode line between adjacent anode plate is 350mm.
There is gypsum slurries atomizer pilot test device lower end, water smoke in simulated flue gas and dust, the slurries of atomization enter conventional wet-esp by blower fan air blast, measure conventional wet electrical dust precipitator import water smoke content and slurries dust content, regulation voltage, wet electrical dust precipitator cathode line length, the removal efficiency of mensuration wet electrical dust precipitator outlet water smoke and dust.
Comparative example 5
Wet type electric dust-removing device is not installed, and there is gypsum slurries atomizer pilot test device lower end, the water smoke in simulated flue gas and dust, and the slurries of atomization, by blower fan air blast, export the content of water smoke and dust.Its import dust concentration is identical with embodiment with import water smoke concentration, and outlet dust concentration is as shown in the table with outlet water smoke concentration.
| Outlet dust concentration/(mg/m3) | Outlet water smoke concentration/(mg/m3) |
| 200.34 | 10008.33 |
Result by above embodiment and comparative example is known, adopts the desulfurizer of wet electrical dust precipitator of the present invention all can reach higher level to the dust removal efficiency in flue gas and water smoke removal efficiency.
Claims (10)
1. a wet electrical dust precipitator, is characterized in that, comprising:
Positive plate, this positive plate is that some edges are vertically to the bending plate that extends and mutually walk abreast and arrange;
Cathode line, is set to some, and hangs between adjacent two bending plates, bends with same trend with described bending plate, and in every cathode line, several prickles are fixed at interval;
Two cathode line hanging frames, lay respectively at the above and below of described positive plate, for top and the bottom of fixed negative pole line;
Insulator chamber, for the termination of fixing described two cathode line hanging frames;
Clean water pipe, be installed on the top of described positive plate.
2. wet electrical dust precipitator according to claim 1, is characterized in that, the length of described bending plate is 2～8m, and the distance between two folding lines is 300mm～800mm, and the angle of bending part is 140 °～170 °.
3. wet electrical dust precipitator according to claim 1, is characterized in that, the spacing between adjacent two bending plates is 280mm～400mm.
4. wet electrical dust precipitator according to claim 1, is characterized in that, the length of described prickle is 5～25mm, and in every cathode line, the spacing of adjacent prickle is 50～150mm.
5. wet electrical dust precipitator according to claim 1, is characterized in that, the setting space of the some cathode line between adjacent two bending plates is 250mm～500mm.
6. wet electrical dust precipitator according to claim 1, is characterized in that, is also provided with the stationary pipes for fixing described cathode line between adjacent two bending plates.
7. wet electrical dust precipitator according to claim 1, is characterized in that, described cleaning water pipe is arranged in the both sides at every bending plate top, is close to two faces of corresponding bending plate.
8. wet electrical dust precipitator according to claim 6, is characterized in that, the nozzle spacing on described cleaning water pipe is 50～70mm, and the spray angle of spray orifice becomes 30 °～60 ° angles with corresponding bending plate.
9. a wet-esp desulfurizer that comprises wet electrical dust precipitator as described in claim as arbitrary in claim 1～8, comprises desulfurizing tower, is provided with successively from the bottom to top slurry pool, desulfurization spraying layer, one-level demist layer and secondary demist layer in desulfurizing tower; It is characterized in that, also comprise, be arranged on the described wet electrical dust precipitator between described one-level demist layer and secondary demist layer; Collecting tank between wet electrical dust precipitator and one-level demist layer; And to be positioned at desulfurizing tower be outward the power supply of wet electrical dust precipitator power supply.
10. utilize Wet type electric dust-removing device as claimed in claim 9 to carry out a method for smoke-gas wet desulfurization, it is characterized in that, comprise the steps:
Flue gas is sent in desulfurizing tower by the gas approach of desulfurizing tower, and flue gas is upwards got rid of by the exhanst gas outlet of desulfurizing tower successively after desulfurization spray, one-level demist, wet-esp and secondary demist;
The slurries that desulfurization spray produces fall in slurry pool, in slurry pool, pass into air, are oxidized; Rinse water in wet-esp process and after wet-esp is collected by collecting tank, and outside desulfurizing tower, cache filter is processed rear reuse and made rinse water.
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| CN107530621A (en) * | 2015-04-27 | 2018-01-02 | 三菱日立电力系统株式会社 | The cleaning method of wastewater treatment and device of gas cooler |
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| CN105080311A (en) * | 2015-07-28 | 2015-11-25 | 浙江天蓝环保技术股份有限公司 | Super-clean exhausting integral tower and treating technology for coal-fired boiler exhaust gas |
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| CN106196105A (en) * | 2016-08-26 | 2016-12-07 | 中山市高超环保通风工程有限公司 | Switching concentration-type heat-storage catalytic burning organic waste gas treatment system |
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| CN108080149A (en) * | 2017-12-11 | 2018-05-29 | 浙江碧净环保科技有限公司 | A kind of wet electric precipitator of honeycomb type anode tube and its operating method |
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| CN109404892A (en) * | 2018-10-30 | 2019-03-01 | 长沙宏福环保技术有限公司 | A kind of medium small boiler flue gas ultra-clean exhaust system |
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| CN110841801A (en) * | 2019-11-26 | 2020-02-28 | 广东佳德环保科技有限公司 | Multistage compound dust collector |
| CN111558283A (en) * | 2020-05-12 | 2020-08-21 | 江苏峰峰鸿运环保科技发展有限公司 | Wet-type electric dust removal and desulfurization integrated device and method for flue gas |
| CN111647709A (en) * | 2020-07-10 | 2020-09-11 | 济南环陶环保工程有限公司 | Converter dry-wet mixing primary smoke purification system |
| CN112057999A (en) * | 2020-09-01 | 2020-12-11 | 山东慧君节能环保科技有限公司 | Electromagnetic dust suppression multistage purification device for smoke dust of flame cutting machine and use method |
| CN116273477A (en) * | 2023-05-25 | 2023-06-23 | 南京通用电气装备有限公司 | Self-cleaning dust remover |
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