CN101829470A - Construction technique of electric bag compound type dust remover - Google Patents
Construction technique of electric bag compound type dust remover Download PDFInfo
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- CN101829470A CN101829470A CN 201010176029 CN201010176029A CN101829470A CN 101829470 A CN101829470 A CN 101829470A CN 201010176029 CN201010176029 CN 201010176029 CN 201010176029 A CN201010176029 A CN 201010176029A CN 101829470 A CN101829470 A CN 101829470A
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Abstract
The invention relates to an installation method of a large-unit capacity electric bag compound type dust remover for thermal power plants, in particular to a construction technique of an electric bag compound type dust remover for a 300MW unit, solving the technical problem of installation and use of the electric bag compound type dust remover on a generator unit of at least 300MW. The construction technique comprises the following steps of: arranging hoisting machinery; installing a bottom steel structure; installing a bearing support; installing a shell; installing an ash bucket; installing a top beam; installing an inlet flue gas box; installing a cathode system and an anode system; installing a top plate of the shell; installing a pure air chamber, an outlet flue and a bypass flue; installing an ash cleaning system; installing a lifting valve device; installing a top crane; installing a detecting device; installing an ash precoating device; installing a filter bag; installing a bag cage; and finally detecting fluorescent powder leakage. The technique in the invention increases a working face, quickens the construction progress, reduces construction cost and saves 100 thousand of mechanical cost and 30 thousand of labor cost.
Description
Technical field
The present invention relates to the installation method of the big unit capacity electric bag compound type dust remover in thermal power plant, be specially the construction technique of electric bag compound type dust remover that a kind of 300MW unit is used.
Background information
China is a coal-fired big country, also is an electricity needs big country.At present, the supply of electric power of China is still based on coal fired power generation, in today of China's rapid economic development, the discharging of a large amount of coal-fired flue-gas, especially the floating dust of particle diameter between 0.5～5 μ m, to the human health damage maximum, be the arch-criminal of various poisonous substances in the atmosphere, be the emphasis of dust prevention and control in the atmosphere.
Electric cleaner and fiber bag precipitator all belong to high-efficiency dust remover, and two kinds of equipment have his own strong points, and are being suitable for all having obtained the favorable actual application effect under the working condition of own characteristic.Characteristics such as electric cleaner is low with its resistance, and it is strong to adapt to the flue gas changing capability, and maintenance workload is few are widely used in metallurgy, electric power, and industries such as building materials up to now, still are in leading position in the environmental protection field.
Along with the development of China's economy and technology, citizen's environmental consciousness strengthens greatly, and environmental protection has become the emphasis problem of social concerns; employing efficient height; and the low cleaner of concentration of emission become the development trend of environmental protection, and thus, the superiority of fiber bag precipitator shows significantly.Particularly in recent years, the cloth-bag type dedusting technology was constructed at main frame, media performance, and the adaptability that automatic control level reaches various working conditions all has significant progress, causes the cloth-bag type dedusting technology to be able to fast development.But execution along with the dust emission concentration new standard, it is difficult and uneconomical that the application of electric cleaner and sack cleaner becomes, this just makes electric precipitation and the compound incorporate research of the cloth-bag type dedusting theory of laying a good foundation, and this electric bag compound type dust remover installation method becomes the means that guarantee the deduster dust removing effects.
Summary of the invention
The present invention installs and uses the technical problem of electric bag compound type dust remover and a kind of electric bag compound type dust remover construction method is provided in order to solve the above generating set of 300MW or 300MW.
The present invention is realized that by following technical scheme a kind of electric bag compound type dust remover construction method may further comprise the steps:
Arrange lifting machine; The bottom steel structure is installed; Bearing spider is installed; Housing is installed; Ash bucket is installed; Back timber is installed; The import smoke box is installed, and wherein said steel construction, ash bucket, housing, import smoke box adopt duplex, utilize crane progressively to lift according to the lifting order and put in place; The cathode and anode system is installed, and wherein electric precipitator positive plate and cathod system adopt and make cocked, utilize hoist engine cocked on cocked positive plate and cathode frame, are stored on the interim storage shelf, utilize flat arm lifting to enter electric precipitation inside at last; The housing top board is installed; Air-purifying chamber, exhaust pass, bypass flue are installed; Card is installed; Soot cleaning system is installed; Poppet valve device is installed; The lifting of installation top; The installation and measuring device; Ash precoating device is installed; Filter bag is installed; The bag cage is installed; Carry out the phosphor powder leak detection at last.
Especially after treating steel construction, housing and installing, the lifting that the top carries the lifting facility is installed in time, finishes the follow-up work task, utilize hoist engine and top to play ejection device, reduced the use frequency of main loop wheel machine tool, accelerated construction speed, reduced mechanical expense.Economic benefit: technology of the present invention is constructed in Inner Mongol Jing Hai power plant and Rui Guangdianchang, by opening one's minds, interts and uses hoist engine and top boom hoisting, increase working face, accelerated construction speed, reduced construction cost, save machinery take 100,000 yuan with 30,000 yuan of labour costs.
Description of drawings
Fig. 1 is a 300WM electric bag compound type dust remover front view of the present invention
Fig. 2 is a 300WM electric bag compound type dust remover side view of the present invention
Fig. 3 is ash bucket segmentation combination schematic diagram
Fig. 4 is the anode system structural representation
Fig. 5 is the cathod system structural representation
Fig. 6 is the card structural representation
Fig. 7 is the bearing spider layout drawing
Fig. 8 is the deashing device structural representation
Fig. 9 is the poppet valve device structural representation
Figure 10 is the cocked shelf structure schematic diagram of positive plate
Figure 11 is a process chart of the present invention
Among the figure: the lifting of 1-top, 2-cathod system, 3-anode system, 4-back timber, the 5-anode arranged plate, 6-import smoke box, 7-housing, 8-stair aisle, the 9-ash bucket, 10-steel construction, 11-ash precoating device, the rapping of 12-anode, the 13-bearing spider, 14-filter bag device, the 15-filter bag, 16-filters cage, the 17-soot cleaning system, 18-air-purifying chamber, 19-checkout gear, 20-air-purifying chamber manhole, 21-poppet valve device, 22-bypass flue; 23-drum, the 24-pipeline of jetting, 25-card beam, 26-installs card, and 27-seals top board, the 28-beater, 29-trip rod, 30-pole plate suspending rod, 31-electromagnetic vibrator, 32-manhole door, 33-negative electrode hanging beam, 34-cathode frame, 35-vibrator base, 36-cathode beam, the 37-crossbeam, the 38-longeron, 39-seals side plate, 40-pulse valve seat, the 41-jet pipe, 42-cylinder, 43-cylinder block, 44-seal cover, the 45-seal, 46-lifting arm, 47-hoist engine, 48-storage shelf.
The specific embodiment
As shown in Figure 1, 2, described 300WM electric bag compound type dust remover structure comprises: steel construction 10, the steel construction middle frame of bottom have ash bucket 9, the front of steel construction top is the electricity district, the back is the bag district of two connections, wherein steel construction connects electricity district and bag district by bearing spider 13, bag district, electricity district skin is a housing 7, housing 7 the place aheads are connected with import smoke box 6, housing is an anode arranged plate 5 in the 7 electricity districts, side plate upper end at housing 7 is provided with back timber 4, be provided with anode system 3 and cathod system 2 above housing 7 electricity districts, the bottom in housing 7 electricity districts is provided with anode rapping 12; Be provided with the filter bag device 14 that filter cage 16 and filter bag 15 are formed in the bag district, top, bag district is provided with soot cleaning system 17 and air-purifying chamber 18 and exhaust pass, is provided with checkout gear 19 in the air-purifying chamber 18.
That need to install is divided into four parts, first, common segment steel construction, ash bucket and housing; The anode and cathode system in second portion electricity district; The filter bag device and the pulse ash remover in third part bag district; The 4th part is that monomer test and commissioning of individual system change.
1,2 signals in conjunction with the accompanying drawings, a kind of electric bag compound type dust remover construction method may further comprise the steps: arrange lifting machine; The steel construction 10 of bottom is installed; Bearing spider 13 is installed; Housing 7 is installed; Ash bucket 9 is installed; Back timber 4 is installed; Import smoke box 6 is installed, and wherein said steel construction 10, ash bucket 9, housing 7, import smoke box 6 adopt duplex, utilize crane progressively to lift according to the lifting order and put in place; Cathod system 2, anode system 3 are installed, wherein electric precipitator positive plate and cathod system adopt and make cocked (see figure 10), on cocked, utilize hoist engine 47 cocked positive plate and cathode frame, be stored on the interim storage shelf 48, utilize flat arm lifting to enter electric precipitation inside at last; The housing top board is installed; Air-purifying chamber 18, exhaust pass, bypass flue 22 are installed; Card 26 is installed; Soot cleaning system 17 is installed; Poppet valve device 21 is installed; The lifting of installation top; Installation and measuring device 19; Ash precoating device 11 is installed; Filter bag 15 is installed; Bag cage 16 is installed; Carry out the phosphor powder leak detection at last.
Concrete detail operations step following steps:
The first step, layout lifting machine
What the equipment installation at first will be considered is exactly main loop wheel machine tool, and main loop wheel machine tool should satisfy equipment to be installed, and also will consider reasonability and economy that machinery is selected.
Second step, installation bottom steel structure 10
1, marks the center line of steel column and the cross centre line of column base plate, and go out the 1m absolute altitude line of steel strut with the capital for the size datum dot-dash.
2, steel frame construction adopts duplex, makes up the 2nd Pin thereon after promptly make up a Pin, saving unwrapping wire and adjustment time, increases work efficiency.Place platform to keep steady each member, strict control post distance and Diagonal Dimension, during welding, each position elder generation spot welding is firm, and then welding in certain sequence, with the control welding deformation, after steelframe installs centering, sliding support is installed by drawing.
3, the member that combines hangs with flat arm and directly winches to the installation site, and foundation bolt is penetrated in the bottom plate hole, and the column base plate center line overlaps with the base center line, fixes dilatory rope, the nut of screwing on.Utilize level meter and theodolite inspection, guarantee the perpendicularity of each column absolute altitude and both direction, after adjusting, the dilatory rope of tension, fastening nut, the column base plate hole must be close to parallels.
The 3rd step, installation bearing spider 13
1, bearing spider divides unidirectional (vertical line mark among the figure), two-way (cross hairs mark among the figure) and fixes three kinds, and its arrangement form is seen Fig. 7:
2, the central cross line is marked on the plane on each bearing.Centering hold-down support and spot welding are temporary fixed, are that each bearing of benchmark centering and spot welding are temporary fixed then with the hold-down support.With the hold-down support is reference measurement centre-to-centre spacing and diagonal; Measure the height of each bearing,, on bearing, add backing plate (each bearing has one group of adjustment pad can supply to select for use) according to the height error, backing plate, base plate (corrosion resistant plate) and base-plate spot welding is firm.Misplace by designing requirement during the bearing combination, and, install the back and remove with temporary fixed.
The 4th step, installation housing 7
1, the assembly unit of wallboard, column, inner partition wall plate: can be stitched together combined hanging to improve installation accuracy by several piece wallboard or partition wall and column according to on-the-spot crane capacity, reduce amount of high-altitude operation;
2, housing lifting: when lifting wallboard, partition wall, bearing (polytetrafluoroethylene (PTFE)) slide plate is fixed under the column base plate of wallboard (partition wall), makes slide plate in place with wallboard (partition wall).Before wallboard (partition wall) is in place, abutment surface should be cleaned out;
3, earlier with a wallboard (partition wall) hoisted in position, back in place not decoupling device earlier, treat position and verticality centering after, can decoupling device.Lift the relative wallboard (partition wall) of another row then, centering position and verticality also are strained and fixed with hawser.After two wallboards (partition wall) that two row are relative are in place, then lift bottom pressure part, middle part pressure part between the two row wallboards (partition wall), make it to become a framework, the whole Founder back enforcement tack welding of adjusting with the bolt connection;
The 5th step, installation ash bucket 9
As schematically shown in Figure 3, ash bucket 9 sides of being taper, physical dimension is bigger, makes at manufactory's burst, during combination, according to ash bucket segmentation combination schematic diagram separated into two parts.Ash bucket makes up and will carry out before steelframe is installed prerequisite, so that operation is more reasonable, reduces the work holdup and machinery waste, lifts after the installation of housing wallboard has been welded.
1, during installation on ground, ash hole had better not be assembled, and treats that the electric field internal cleaning installs ash hole after clean again, compares the mutual alignment of easy adjustment ash hole flange center like this; The weld seam of spoiler, tube stay and ash bucket wallboard need bear the power that the ash bucket dust stratification is produced, so the welding quality of the weld seam of spoiler, tube stay and ash bucket wallboard is answered scrutiny, guarantees to adhere to specification; Ash bucket requires whole airtight, and sealing weld will carry out the kerosene leak test.
2, ash bucket inwall foursquare arc plate two side welds must polish with abrasive machine;
3, the adjustment of ash bucket:
Earlier little ash bucket (second portion) is put in advance in advance that the back lifts ash bucket epimere part to the ash disposal platform, treat that side plate, wide column, bottom plate, bottom pressure part install after, one by one with ash bucket centering, tack welding.The ash bucket of burst lifting, the lifting of middle and lower part ash bucket assembly with adjust centering after the top ash bucket docks.Assembling make during ash hole each ash bucket ash hole flange center on electric field length and width point-blank, the flange absolute altitude is on same plane.
The 6th step, installation back timber 4
Back timber 4 is positions extremely crucial in the electric bag compound type dust remover, and back timber generally is divided into wide back timber, narrow back timber, end carriage, laterally six kinds on back timber, rnnning bar and T type beam.
1, should exam piece by piece hanger size (same pole span), linearity and the torsion resistance (≤10) of back timber before lifting, wherein T type beam does not allow arch, underproof should the correction.
2, after wallboard (partition wall) and bottom pressure part, middle part pressure part have lifted, in the installation site of finding out each back timber on the channel-section steel on column, wide column top and the wallboard and with the level height deviation of measuring theodolite or communicating pipe between the each point.
3, the requirement of bag dedusting area back timber levelness is very high, and the horizontal centering in back timber bottom surface wherein to be benchmark, is measured the height tolerance of other each strong points with respect to benchmark respectively.After finding out peak, will take the measure of leveling up, control big soffit whole height error in 5mm at big each supporting-point low spot place, soffit.
4, lifting back timber is adjusted the hanger alignment that back timber makes prime electric field back timber, checks the errorless back enforcement of each size tack welding;
5, the top board of housing should could be installed behind anode arranged plate, cathode frame, negative electrode hanging beam, rapping anvil beam rigging out.
The 7th step, installation import smoke box 6
1, by first big after small order difference assembly unit distribution grid.As the horn integral lifting, then that assembly unit is good distribution grid stacks by up-small and down-big order; Separate lifting as distribution grid and loudspeaker wallboard, then that assembly unit is good distribution grid is suspended on the upper head plate of housing entrance point temporarily by first big after small order;
Reinforce with the shoulder pole crossbeam when 2, lifting by crane.The smoke box end opening is outward-dipping a little, so that the smoke box counterpart.After lifting puts in place, with bolt, nut horn mouth is fixed on the housing earlier, implements welding after adjusting again.
The 8th step, installation cathode and anode system
As Fig. 4,5,6 signals, the cathode and anode system mainly contains the cathode suspension system, and cathode and anode hanging beam, cathode frame, anode row plate are formed, and are the cores of whole electric precipitation, and the quality of its installation quality is with the whole electric field dust removing effects of direct relation;
1, anode is pulled row's 5 liftings: anode arranged plate 5 placement locations should be smooth, and anode arranged plate is before assembling, and reply monolithic positive plate carries out edge-on inspection, correction one by one, and the straightening method adopts and applies external force or knock the knee until alignment with wooden mallet; After the combination of anode arranged plate ground, because insufficient strength, need do one has removed frame and has helped that pole plate is upright to be stored on the anode and cathode storage shelf made from hoist engine, when storing the anode arranged plate of some on the storage shelf, hang in the electric field with main loop wheel machine tool is concentrated, reduce the frequency of using main loop wheel machine tool, improved operating efficiency, reduced cost.Cathode frame can lift with anode arranged plate after combination on the anode arranged plate is temporary fixed in addition, reduces distortion.
2, anode rapping 12 is installed and required: anode rapping rapping shaft is installed should guarantee that the diaxon axiality is φ 1mm, and power transmission shaft and rapping shaft axiality are φ 2mm; Rapping shaft tightens the back-up ring screw hole, 10 holes of corresponding brill φ with back-up ring during installation, and it is flat with the back-up ring outer peripheral face that hole depth must satisfy dog screw locking back; Install beater in accordance with regulations direction rotation tup make its rapping point that hits regulation, unless stated otherwise, under the cold conditions beater 28 striking points must be under trip rod 29 horizontal center lines the position of 1cm; Tup rotation should be not only steadily but also flexible, and can adjust distance by increase and decrease bearing block lower gasket, horizontal level also can be by the moving shaft holder adjustment.Install back starter motor field investigation, normal back welds all parts of assembling by the figure requirement.
3, the installation of negative electrode hanging beam,
After having lifted, cathode frame 34 just can between back timber, support channel-section steels by welded cathode hanging beam 33 temporarily.All interim channel-section steels that support of same subregion must be adjusted at same horizontal plane.Cathode frame is suspended on the negative electrode hanging beam with pin, and the attachment weld of welded cathode framework mainmast and negative electrode hanging beam.The negative electrode hanging beam: top board pressure-bearing insulator support platform is cleaned out, and the pressure-bearing insulator support flange is in place.Adjust the pressure-bearing insulator support flange and make its center, hole overlap and make the bearing level, implement tack welding then with negative electrode suspending rod center.
4, cathode suspension system and electromagnetic hammer vibrator 31 are installed
4.1 top board pressure-bearing insulator support platform is cleaned out, and the pressure-bearing insulator support flange is in place.Adjust the pressure-bearing insulator support flange and make its center, hole overlap and make the bearing level, implement tack welding then with negative electrode suspending rod center;
4.2 it is in order that lower gasket, pressure-bearing insulator, upper gasket, insulator cover plate is in place.The carrying injured surface glaze layer that should prevent to collide with during pressure-bearing insulator, in place before, whether insulator inner surface wiped clean and scrutiny insulator surfaces externally and internally should be had crackle, the ability that surface quality is qualified is in place.Lower gasket, pressure-bearing insulator, upper gasket should be adjusted, and it is overlapped with negative electrode suspending rod center;
4.3 lower link cover, tapered insulation axle, rapping assembly are installed.With the verticality (deviation of cylindrical section is not more than 3mm) of the tapered insulation axle of messenger wire method inspection, underproof should the adjustment.Simultaneously, check that whether rapping assembly and the perforate of incubator top board exist interference or the too little phenomenon in gap, answer mowing to reach the drawing requirement if exist;
4.4 vibrator base 35 is installed.Because the top board and the horizontal plane of incubator have certain angle, when being installed, the vibrator base should carefully recognize, prevent that dress is wrong.Adjust base and make itself and vibrating rod, cathode rapping assembly concentric (its axiality requires to be φ 5mm); Simultaneously, make base neat in length and width;
4.5 hypo logical sequence sealing ring, pressing plate, steel band anchor ear, electromagnetic vibrator are installed.Adjusting vibrator 31 adheres to specification its verticality, rapping rod exposed length.Wherein, the vibrator verticality is 1mm, and rapping rod center should be φ 5mm with the concentricity at vibrating rod center.
5, the heteropole distance of cathode and anode spacing and with the adjustment of pole span, be benchmark with the anode during location, the centering negative electrode, the connection of pole plate and top suspention plate, lower tie plate must be tightened with torque spanner, nut screwing clamping moment 135Nm, tighten the back point and weld, refill antiswing device then and make itself and trip rod that enough expansion gaps be arranged.Heteropole is strict controlled in ± 10mm apart from deviation, checks minimum heteropole distance with drift, and the heteropole that drift can't pass through is apart from necessary detailed inspection reason and correction; Between scrutiny positive plate suspention flange of beam and the cathode frame mainmast surface whether tip or burr are arranged, have then in time to polish.
The 9th step, installation housing top board
1, when rapping anvil beam 36, negative electrode suspending rod assembly install and verticality adjust qualified after, could lift the housing top board.Can on top board, add interim bracing piece and removing after top board is in place for preventing to be out of shape during the lifting top board;
2, centering top board makes center, pressure-bearing insulator support platform hole overlap with negative electrode suspending rod center;
3, adjust top board and make pressure-bearing insulator support platform level (checking), implement tack welding with horizon rule; Should weld pressure-bearing insulator support platform zone earlier during welding, cause pressure-bearing insulator support platform levelness to change to prevent welding deformation;
4, check the deviation at the center, hole that negative electrode suspending rod center and negative electrode suspending rod are passed through; Check the air-tightness of each bar weld seam; Check pressure-bearing insulator support platform absolute altitude and levelness, level up with plate, make each support platform at same horizontal plane according to measurement error.
The tenth step, installation air-purifying chamber 18, exhaust pass, bypass flue 22
1, each side plate of lifting air-purifying chamber, dividing plate, lamina tecti; Behind the air-purifying chamber installation in position centering, should check size, after the passed examination, weld by drawing.To guarantee the intensity and the sealing of weld seam during welding; It is flat to fetch water when discharge pipe is installed, and guarantees that its levelness is less than 2mm.
2, the installation of exhaust pass: carry out at the top that is assembled in of exhaust pass.When exhaust pass is installed, the valve plate of poppet valve device 21 should be put into flue, in order to avoid after exhaust pass installed, valve plate can't be installed.
3, the installation of bypass flue 22: the installation and the exhaust pass of bypass flue are equal to, just when mounted, should pay attention to following some: after the valve seat welding, must clean valve seat groove and silicone rubber seal pad with acetone, use sealant bonding then, must protect till the drying after bonding; Before top board is installed, earlier valve plate is put into casing; After installing bypass flue cylinder and lifting arm, answer the slit of scrutiny valve plate and sealing gasket.Must accomplish does not have any slit between the two, and valve plate must be more than the indentation sealing pad 5mm.
The 11 step, installation 26 cards are seen Fig. 6
1, the installation of T type beam: the installation of T type beam (longeron 38, crossbeam 37) will guarantee the precision of both direction: the one, and the error of T type beam horizontal plane, each chamber T type beam horizontal plane deviation must be controlled at below the 3mm; The 2nd, the precision between T type beam and the T type beam, location dimension is extremely important between T type beam and T type beam, if make mistakes, safe distance between card bore edges and T type beam just can not guarantee so, so the size of T type beam and each card must be unified, for preventing to make mistakes, lay simultaneously by a locellus T type beam and card;
2, the laying of card: by horizontal, first and last piece card elder generation shop of each chamber.By drawing, guarantee the location dimension at the first round center of first card, in a lateral direction, the pitch-row size between first center, hole of first card of assurance and last center, hole of last piece card.After these sizes guarantee, measure the diagonal deviation≤2mm in two card holes.Then this two fast card is carried out the means of spot welds location, block-by-block is laid all the other cards (never allowing when adjusting the card position with steel part sled card hole) again; C) process: fill weldering owing to adopt between the card, certainly exist cross-direction shrinkage.According to the installation experience, the contraction of about 1mm can appear in every weld seam, reserves increasing, every 1mm so can press weld seam from first card to a last card;
3, the required precision of card: after the welding, each is to pitch-row error≤2mm, can not accumulated error, and levelness is≤1/1000, maximum≤3mm;
4,, except that above process amplifies, must adopt the segmentation welding during welding because there is moderate finite deformation in welding.Be the check of the staggered disconnected weldering full weld of spot welding: after card has all welded, must do the experiment of kerosene seepage, if any seepage repair welding in time.
The 12 step, installation deashing device 17 are seen Fig. 8,
1, the installation of gas bag 23, winding-up pipe 24
1.1 connect by flange between gas bag and the winding-up pipe, for avoiding overhead welding, suggestion is earlier with paired male and female flange and gas bag connecting tube welding;
1.2 gas bag support and winding-up pipe fixedly angle steel adopt same benchmark location.Be benchmark with the back timber supporting surface generally, because when the adjustment body plane is spent, may there be the phenomenon of back timber bed hedgehopping in back timber, like this, gas bag support and winding-up the pipe fixedly size of angle steel must recomputate definite according to on-site actual situations;
1.3 after location dimension is determined, in the vertical, first of first gas bag of having good positioning earlier supports and last support (Heibei provincial opera of need fetching water is whole) of last gas bag, backguy between the two, support a fixing earlier part by two of each gas bags and support, all the other supports are treated to install after gas bag is located fully again;
1.4, note jetting and manage that fixedly every pair of slotted eye center of angle steel and center, corresponding card hole must be on same straight lines by the fixing angle steel of the fixing winding-up pipe of figure requirements;
1.5 gas bag and winding-up pipe are adjusted simultaneously.With a chamber is unit, earlier by theoretical size, adjust the size of gas bag apart from shrouding, then first is tried to connect by male and female flange with gas bag with last root winding-up pipe, after integral body is adjusted to Position Approximate, use simple die (the simple die drawing is please asked for to I the scene worker of company in generation) to guarantee that the axiality at short tube center is managed in 2mm with winding-up in center, the middle card hole in the delegation, and then check the axiality at this winding-up pipe first and last center, short tube corresponding with it card hole of jetting, undesirable should the adjustment with this mould.If exist than mistake (only allow is because excessive causing shunk in welding) because card is installed, then should suitably adjust, divide equally error.After first and last root winding-up pipe were according to said method determined, gas bag had been finished the location basically.Remaining pipe of jetting only needs the adjustment lateral attitude to get final product so, and the axiality that all must guarantee middle center, card hole and winding-up pipe short tube center is in 2mm.
After adjusting the winding-up pipe, will jet pipe and flange spot welding several position (guaranteeing winding-up pipe and flange position relative fixed);
1.6 after what a chamber is installed, on pulse valve seat 40 positions, draw a straight line, make pulse valve seat identical in the gas bag at same horizontal plane, adjust the gas bag and the winding-up pipe of other each chambers by above method;
1.7 take off and put the winding-up pipe and the flange that weld and carry out full weld, then each chamber winding-up pipe is numbered, put into a pile in order, for back filter bag bag cage is installed ready;
1.8 installation process does not allow when adjusting the gas bag position with iron staff sled gas bag nozzle stub.The installation pulse valve of pulse valve belongs to valuables, all care should be used to protections before and after installing.Before pulse valve was installed, pulse valve seat and nozzle stub all surface rust were mixed and must be removed, and clean with compressed air then.Install after being arranged in all welding jobs and finishing.Note not allowing too firmly rotation during installation, the anglec of rotation is unsuitable excessive, prevents from sealing ring is revolved disconnected.The pulse valve steam vent must be down!
The 13 step, poppet valve device 21 is installed, poppet valve device 21 is by lifting arm 46, seal cover 44, and seal 45, cylinder 42, cylinder block 43 constitutes.
1, whether checks lifting arm before poppet valve device is installed earlier because of transportation produces distortion, if having then proofread and correct to guarantee system activity flexible;
2, the installation of poppet valve device will notice that the lifting arm center aligns with air-purifying chamber escape pipe central vertical.Cylinder location centering requires:
2.1 cylinder push-rod axis and air-purifying chamber discharge pipe guiding trepanning centres degree are not more than φ 2mm;
2.2 cylinder push-rod axis and air-purifying chamber discharge pipe guiding trepanning central vertical degree are not more than φ 2mm.
2.3 valve plate and housing discharge pipe end face must levels, and peripheral parallel contact, push away valve plate under the cylinder and compress closing gap and be not more than 2mm;
When 2.4 seal oil immersion asbestos packing intercepts the needed length of single lift valve, must be by drawing, otherwise the not enough phenomenon of last length can appear.When the oil immersion asbestos packing is installed, do not allow to block installation, need whole and coil in lifting arm;
After 2.5 compressed air is connected, lift valve knee-action smoothness, phenomenon does not appear significantly blocking, suppressing in lifting arm.
The 14 step, installation top lifting 1
After 1 installation is lifted by crane at the top, can move back with main loop wheel machine tool, finish remaining works by the top lifting, reduce the generation that machinery takes, reach the purpose that reduces cost.
1, column must be strict with the figure construction with being connected of back timber, top board;
2, the top crane requires to try to hang by relevant criterion before being delivered for use installing.
The 15 step, installation compressed air system
1, can rearrange pipeline according to on-site actual situations, avoid interfering with other parts;
Should consider the withdrawal space of source of the gas three linked piece, filter, pressure-reducing valve etc. when 2, installing, the particular location scene can suitably be adjusted;
Should note the airflow direction of source of the gas three linked piece, filter, pressure-reducing valve, stop valve, check-valves when 3, installing, not connect anti-;
4, behind the connection compressed air gas source, need the welding quality of scrutiny per pass weld seam,, need timely repair welding if any gas leakage.
The 16 step, installation and measuring device 19
1, differential pressure transmitter and pressure transmitter belong to precision instrument, should note protection during installation;
2, the size of bracing frame by drawing is welded on the air-purifying chamber wallboard, uses bolt and nut splicing ear case again;
3, heavy grey kettle is by 3/4 " welded tube be communicated to dirt pocket, the other end passes through 1/2 " welded tube be connected with transmitter;
4, all pressure guiding pipes should be avoided interfering with other parts, and perforate is on-the-spot fixed, but requires neat appearance;
5, connect differential pressure transmitter and each chamber pressure guiding pipe by figure, must not arbitrarily change;
Note when 6, installing the pressure guiding pipe elbow towards, need strictness by drawing;
The 17 step, installation ash precoating device 11
1, should on-the-spot check the position that grey car can arrive before ash precoating device 11 is installed, thus decision precoating ash pipeline trend;
2, carry out the installation of ash precoating device by the figure requirement, note during installation being oriented the flue gas direction to grey pipe bend;
3, the welding of pipeline must firm sealing.
The 18 step, installation filter bag 15
1, the essential condition of filter bag installation: after the inner Steel Structure Installation passed examination of electric bag compound type dust remover, determining will not have naked light operations such as gas cutting, welding (note: the interim angle steel when housing is installed must all cut off) after filter bag is installed, otherwise filter bag is burnt in the construction of the naked light of back easily; The pipeline and the valve member of bag district's soot cleaning system are cleaned out with compressed air, in order to avoid bring foreign material to damage filter bag during operation; ) begin to install filter bag after being arranged in operations such as boiler baker, washing pipe, stick with paste bag (an especially overlay film filter bag) in order to avoid these operation processes produce a large amount of low temperature, high humidity, high oil smoke gas pickup, cause the filter bag hole to stop up after easy-clear and increase resistance not; Possess filter bag precoating ash condition, promptly flue system connects, and normally start and stop of blower fan, are coated with grey equipment preparation and put in place flyash; The compressed air gas circuit is unimpeded, and lift valve, bypass valve are can knee-action smooth and easy, and bag district low-pressure system can operate as normal; The inner cleaning of air-purifying chamber is clean; The winding-up pipe of having numbered after the internal debugging of dismounting air-purifying chamber, smooth stacking on one side.
2, filter bag installation method: protective jacket is packed in the card hole, and the sheath cloth must surround the whole circle of card bore edges; The filter bag FCL breaks a seal after entering air-purifying chamber, takes filter bag outer packaging film again apart, is introduced in the card hole that is with sheath at the bottom of then making bag and slowly puts down filter bag, and sack takes out sheath behind the card hole.Behind the careful taking-up sheath, both hands bending filter bag elastic ring, outer sack groove alignment card bore edges (preferably the sack suture contacts with the card hole earlier), even contact and playback gradually, the whole circle of bag ring and card is adjacent to, and tensioning is even.Can't the exchange premium card as last playback place, can use rubber hammer to strike tight periphery gently to tensioning.
The 19 step, an installation bag cage 16
Check whether mounted filter bag is vertical, all stretch; The bag cage wants two people to cooperate for dividing the bag cage framework of upper and lower two joints (upper, middle and lower three joints) during installation, earlier next joint carefully is inserted in filter bag, when staying certain-length, reinforcing bar is penetrated a bag cage, utilizes reinforcing bar that a joint bag cage is down hung on the card then.People's both hands are taken joint bag cage then, and another human special vice is inserted in snap ring to last joint bag cage; After the two joint bag cages butt joints, check whether its butt joint is firm up and down, the snap ring chucking that whether puts in place.Whole bag cage framework slowly is inserted in downwards in the filter bag, never allows to impact the bag end fast, if be inserted in after having the obstruction of difference to ascertain the reason again; Inspection bag halter covers the situation that contacts with card, and skull should be good with contacting of card, if any more loosening, answers the scrutiny reason, sees whether this filter bag passes other locellus.
The 20 step, the phosphor powder leak detection
The filter bag leak detection of electric bag compound type dust remover is after deduster installs filter bag it to be carried out " phosphor powder leak detection ".
1, the essential condition of phosphor powder leak detection: the air inducing function runs well, and aperture cooperates, and the pneumatics function provides source of the gas;
When 2, doing the phosphor powder leak detection, the state of lift valve and bypass valve: lift valve is in open mode, and bypass valve is in closed condition, and all manhole doors are all closed;
3, at main air blower with half operation of design air flow, under the soot cleaning system condition out of service, phosphor powder is dropped into the opening part (generally pour into, specifically decide) of the inlet flue duct of deduster on field condition from the pressure test hole;
4, after phosphor powder dropped into deduster, blower fan maintenance operation at least can be evenly distributed on the filter bag of each locellus of electric bag compound type dust remover to guarantee phosphor powder more than 20 minutes;
5, after main air blower cuts out, open the air-purifying chamber manhole door of electric bag compound type dust remover, the inspection personnel is being with fluorescent lamp (ultraviolet lamp) to enter each air-purifying chamber inspection.Clothes shoes and hats, health other parts can not have fluorescent material when the inspection personnel entered deduster inside, and the person must not enter inspection to have fluorescent material.Carefully detect card seam crossing in the air-purifying chamber, the point of interface of filter bag and card etc. with fluorescent lamp.During detection, dark more the carrying out that can help leak detection work more of surrounding environment brightness;
6, check that discovery has fluorescent material place (fluorescent material is shown in red under fluorescent lamp), anatomizes reason, and performs mark and record.When handling the fluorescent material leakage, welding should perform filter bag as need
7, check the quantity of bypass chimney valve panel area fluorescent material, open bypass valve, check that the silicone rubber seal pad compresses the quantity of former and later two position fluorescent material at valve plate, whether amount of leakage is big to check the bypass flue, as reveal and excessively should analyze reason, do respective handling (it is too little that ordinary circumstance is that valve plate is pressed into the space of silicon rubber, valve plate suitably can be screwed off).
Claims (1)
1. an electric bag compound type dust remover construction method is characterized in that: may further comprise the steps: arrange lifting machine; The steel construction (10) of bottom is installed; Bearing spider (13) is installed; Housing (7) is installed; Ash bucket (9) is installed; Back timber (4) is installed; Import smoke box (6) is installed, and wherein said steel construction (10), ash bucket (9), housing (7), import smoke box (6) adopt duplex, utilize crane progressively to lift according to the lifting order and put in place; Cathod system (2), anode system (3) are installed, and wherein electric precipitator positive plate and cathod system adopt and make cocked, and positive plate and cathode frame are utilized hoist engine (4 on cocked
) cocked, be stored on the interim storage shelf (48), utilize flat arm lifting to enter electric precipitation inside at last; The housing top board is installed; Air-purifying chamber (18), exhaust pass, bypass flue (22) are installed; Card (26) is installed; Soot cleaning system (17) is installed; Poppet valve device (21) is installed; The lifting of installation top; Installation and measuring device (19); Ash precoating device (11) is installed; Filter bag (15) is installed; Bag cage (16) is installed; Carry out the phosphor powder leak detection at last.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102494536A (en) * | 2011-12-05 | 2012-06-13 | 中冶天工集团有限公司 | Construction method for dust-fall pipe of sintering chamber |
| CN103894288A (en) * | 2014-03-26 | 2014-07-02 | 李连清 | Cavity-separated type aerosol capturing device |
| CN104069948A (en) * | 2014-06-30 | 2014-10-01 | 广东韶钢松山股份有限公司 | Electric precipitation and ash collection plate bent frame and application method thereof |
| CN104406178A (en) * | 2014-11-30 | 2015-03-11 | 伟明环保设备有限公司 | Irregular ash falling device |
| CN105043683A (en) * | 2015-08-04 | 2015-11-11 | 浙江工商大学 | Insulator airtightness detection system and method |
| CN105413382A (en) * | 2016-01-12 | 2016-03-23 | 枣庄中联水泥有限公司 | Electrostatic-bag composite dust collector |
| CN106861908A (en) * | 2017-03-03 | 2017-06-20 | 中冶宝钢技术服务有限公司 | Sintering machine electric cleaner maintenance process |
| CN106955789A (en) * | 2017-05-25 | 2017-07-18 | 安徽意义环保设备有限公司 | A kind of electric cleaner of combined type automatic ash removing |
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| CN102494536A (en) * | 2011-12-05 | 2012-06-13 | 中冶天工集团有限公司 | Construction method for dust-fall pipe of sintering chamber |
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| CN104069948A (en) * | 2014-06-30 | 2014-10-01 | 广东韶钢松山股份有限公司 | Electric precipitation and ash collection plate bent frame and application method thereof |
| CN104406178A (en) * | 2014-11-30 | 2015-03-11 | 伟明环保设备有限公司 | Irregular ash falling device |
| CN105043683A (en) * | 2015-08-04 | 2015-11-11 | 浙江工商大学 | Insulator airtightness detection system and method |
| CN105413382A (en) * | 2016-01-12 | 2016-03-23 | 枣庄中联水泥有限公司 | Electrostatic-bag composite dust collector |
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| CN106861908A (en) * | 2017-03-03 | 2017-06-20 | 中冶宝钢技术服务有限公司 | Sintering machine electric cleaner maintenance process |
| CN106955789A (en) * | 2017-05-25 | 2017-07-18 | 安徽意义环保设备有限公司 | A kind of electric cleaner of combined type automatic ash removing |
| CN106975571A (en) * | 2017-05-25 | 2017-07-25 | 安徽意义环保设备有限公司 | It is a kind of can be with the electric cleaner of automatic ash removing |
| CN107469493A (en) * | 2017-09-26 | 2017-12-15 | 浙江诸安建设集团有限公司 | A kind of sack cleaner installation method |
| CN109099872A (en) * | 2018-08-01 | 2018-12-28 | 中钢集团新型材料（浙江）有限公司 | A kind of pre-assembled system and method for graphite component |
| CN109099872B (en) * | 2018-08-01 | 2023-12-26 | 赛迈科先进材料股份有限公司 | Pre-assembly system and method for graphite member |
| CN111957443A (en) * | 2020-07-15 | 2020-11-20 | 中国十七冶集团有限公司 | Modularized installation method for electric dust remover shell |
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