CN104941805A - Wet electric precipitation system mounting method - Google Patents
Wet electric precipitation system mounting method Download PDFInfo
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- CN104941805A CN104941805A CN201510321437.XA CN201510321437A CN104941805A CN 104941805 A CN104941805 A CN 104941805A CN 201510321437 A CN201510321437 A CN 201510321437A CN 104941805 A CN104941805 A CN 104941805A
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Abstract
The invention provides a thermal power generation wet electric precipitation system mounting method, which is characterized in that a thermal power generation wet electric precipitation system device is divided into several parts, and a step-by-step combined hoisting method and a mounting and anti-corrosion cross-operation method are adopted; in construction sequence, a framework is first mounted, and then a body is mounted, parts are mounted from outside to inside, and the construction principle that the mounting is in cooperation with anti-corrosion, and the mounting and the anti-corrosion are alternately carried out is followed; and the mounting is carried out according to the following operation sequences of mounting of the body and the framework, mounting of a shell, mounting of an insulation barrel, anti-corrosion, mounting of a cathode suspending lower girder (comprising a cathode wire lower framework), mounting of an anode module (comprising anode grounding and anode module upper and lower part sealing), mounting of a cathode suspending upper girder (comprising a cathode wire upper framework), mounting of a cathode wire, mounting of a top spraying system, adjusting of the cathode wire and mounting of a secondary atomizing system.
Description
Technical field
The present invention relates to a kind of construction method of installation of steam power plant, be specifically related to construction method of installation and the opening device of Wet-type electric dust removal system in a kind of thermal power generation system, belong to steam power plant technical field of construction.
background technology:
At present, haze becomes the great environmental problem affecting human life quality, and thermal power industry is as producing the main industries of haze, and the discharge reducing dust by modes such as scrap builds even realizes zero-emission becomes inexorable trend.Under the background in this epoch, wet-esp industry is arisen at the historic moment.Wet electrical dust precipitator is that a kind of being used for processes containing micro-dust and microparticle
novelcleaner, is mainly used to remove the harmful substance such as dirt, acid mist, water droplet, aerosol, stink, PM2.5 containing in humid gas, is the ideal equipment of administering atmospheric dust pollution.Wet electrical dust precipitator is a kind of new cleaner being used for processing containing micro-dust and microparticle, is mainly used to remove the harmful substance such as dirt, acid mist, water droplet, aerosol, stink, PM2.5 containing in humid gas, is the ideal equipment of administering atmospheric dust pollution.In order to administer haze, in present many thermal power generation systems, all bring into use this set of system to reduce the discharge of dust.But present stage, wet-esp technology is also in the starting stage at home, and the installation requirement of equipment is higher, and different mounting means may bring different effects, how making its installation effect and dust removal performance index can reach best, is the emphasis that industry is being studied always and paid close attention to.
Do not find that there is the patent literature constructed with the present invention by patent retrieval, to have the patent of certain relation to mainly contain following with the present invention:
1, the patent No. is CN201510104187, what name was called " a kind of device for supercharging and insulator drying in wet electrical dust precipitator crossbeam "
utility modelpatent, which disclose a kind of device for supercharging and insulator drying in wet electrical dust precipitator crossbeam, comprise at least one booster fan, differential pressure transmitter, heater, blast regulator, crossbeam, insulator, mount pad and ventilation duct, insulator is provided with in described crossbeam, described crossbeam is provided with mount pad, described mount pad is provided with booster fan and heater, the output of described heater is connected with the input of booster fan, the output of described booster fan is connected with crossbeam by ventilation duct, described ventilation duct is provided with differential pressure transmitter and blast regulator, described ventilation duct is provided with blast regulator in crossbeam.
2, the patent No. is CN201510102160, name is called the patent of invention of " a kind of wet-esp collecting plate and wet-esp ", which disclose a kind of wet-esp collecting plate and wet electrical dust precipitator, collecting plate comprises: N block metal plate, every block metal plate all offers M row first through hole; M is multiplied by N-1 block metallic interconnect, is U-shaped plate and/or Z-shaped plate; Two ends of metallic interconnect all offer row second through hole; Size and the interval of the size of the second through hole and interval and the first through hole are mated; Wherein, M block metallic interconnect connects two pieces of metal plates; Be multiplied by N-1 block metallic interconnect to make M and connect N block metal plate, form M-1 and be multiplied by N-1 square duct; Wherein, a discharge electrode is provided with in each square duct.
3, the patent No. is CN201320756778, the patent of invention that name is called " a kind of wet-esp desulfurization integrated device ", and which disclose a kind of wet-esp desulfurization integrated device, it comprises absorption tower, Wet-type electric dust removal system and desulphurization system; Absorption tower has and is positioned at the smoke inlet of tower body middle and lower part and the exhanst gas outlet at top, bottom-up installation desulphurization system and Wet-type electric dust removal system; This device, while the desulfuration efficiency of guarantee thermal power plant, removes the aerosol that drop, fine solid particle, heavy metal Hg and SO3, NH4 etc. are formed, and reduces desulfurizing tower outlet Pollutant emission concentration, reaches
countryup-to-date discharge standard.
Although these patents above-mentioned all relate to wet-esp, also the improvement that some are structural is proposed, but be all to improve from structure merely, not from how improving mounting means to consider the effect improving wet-esp, existing thermal power generation Wet-type electric dust removal system is installed still disorderly and unsystematic, effect differs, so that greatly affect the ability of wet-esp in pollution abatement, therefore still needs to be improved further.
Summary of the invention
The object of the invention is to for the problem existing for existing thermal power generation wet-esp mounting means, a kind of thermal power generation Wet-type electric dust removal system mounting means of systematic science is proposed, this mounting means you can greatly specification thermal power generation Wet-type electric dust removal system install behavior, make the installation effect of wet-esp substantially reach so that, maximally play the effect of wet-esp.
In order to reach this purpose, the invention provides a kind of thermal power generation Wet-type electric dust removal system installation method, thermal power generation Wet-type electric dust removal system device is merotomized, adopt substep combined hanging, install and the method for anticorrosion cross-operation; Sequence of construction is taked first framework, rear body, and from outside to inside, installation coordinates anticorrosion, and the construction principle of anticorrosion interspersed installation is installed.
Further, described substep combined hanging, installation and anticorrosion cross-operation are installed according to the following sequence of operation:
1) body frame is installed
2) housing is installed
3) thermal insulating cylinder is installed
4) anticorrosion
5) cathode hanger bottom install crossbeam (comprising cathode line lower frame)
6) anode module is installed (comprising plus earth and the sealing of anode module top and the bottom)
7) cathode hanger top install crossbeam (comprising cathode line upper frame)
8) cathode line is installed
9) roof spray system is installed
10) cathode line adjustment
11) secondary-atomizing system is installed
12) check and accept.
Further, described housing is installed and is comprised reducer circumference joint, upper lower box and internal truss frame installation; From bottom to top be respectively reducer circumference joint, lower box and truss, upper box and truss, be connected by non-metal expansion joint with desulfuration absorbing tower under reducer circumference joint, internal truss frame is furnished with secondary-atomizing pipeline, lower box inside is anode module, anode module is distributed on lower box truss, have one deck distribution grid in its underpart, upper box internal structure is cathode line and top spray pipe-line system; Cathode line and anode module are divided into 4 regions by PP plate, are commonly called as 4 electric fields; Housing lifts after installing and taking ground to combine respectively, and lifting machine adopts 25t building tower crane; Assembly welded on ground simultaneously and polish and setting up springboard on truss.
Further, described thermal insulating cylinder is installed and is taked single-piece lift, lifts together with when interior heater and porcelain vase and negative electrode beam suspension rod are in lifting; After the installation of thermal insulating cylinder, in
portion's methodblue faying face FRP or acid-resisting sealant sealing, ensure airtight quality further.
Further, described anticorrosive construction operation is: housing inspection → matrix blasting treatment → prime (point twice brushing, twice face
look brightaobvious different, mutually vertically) → clay smear → local FRP strengthens (position such as wallboard, truss angle) → quality testing and repairs examination → finish paint brushing → comprehensively check and accept; Anticorrosive construction is taked segmentation and slicing construction, the construction of key area emphasis, is carried out with the mode of installing crossed construction round the clock; Anticorrosive construction takes ground corrosion-resistant mode to carry out, and carries out anticorrosion on ground by upper lower box truss and wallboard on ground, needs welding position to reserve, enters after treating welding in place again
row preventing localrotten reparation; Anticorrosion examination and detection method are as follows successively:
1) estimate: require that anticorrosive coat surface integral is even, smooth, without holiday, without obvious especially uneven situation;
2) Thickness sensitivity: carry out Thickness sensitivity by electromagnetic thickness tool, at least surveys 3 points for every square metre;
3) electric spark detects: carry out 100% comprehensive Pinhole by electric spark detector to anticorrosive coat, should carry out in time repairing when discovery exists pin hole until detected by electric spark qualified till; The voltage that electric spark detects is 8000V, (often increases 1mm and detects voltage increase 3000V.
Further, described anode module installation kit draws together following steps:
1) anode module is by being made by handwork, and size exists part deviation, and anode module should measure the size (long and wide) of each anode module before installing, and detailed pen and paper record each anode module sized data also carry out mark;
2) by level measurement anode module fulcrum lower box truss levelness, because truss surface completes anticorrosive construction, its air spots, and there is error when installing, adopt the FRP backing plate of multi-thickness specification (1mm, 2mm, 5mm) for adjusting anode module;
3) in anode module, the length and width of anode module and the mark of center is carried out; Lower box truss finds anode module fulcrum on-station position center and carries out mark;
4) determined the installation site of each anode module by contrast, start to lift anode module after anode module fulcrum place being leveled up with FRP backing plate.According to mark adjustment anode module position, guarantee each anode module point-blank;
5) need in anode module hoisting transport process to carry out flange process, because anode mold bulk matter is FRP, for preventing colliding in turn-up process, following method is adopted to carry out flange, method for flanging is: the spacing first making a set of " fringed iris herb " " fringed iris herb " upper left and right two hangers is identical with the spacing of the hanger of anode module both sides, " fringed iris herb " top hanger snap ring steel wire rope is connected with crane hook, below hanger uses snap ring respectively, steel wire rope is connected with anode module top hanger, anode module bottom hanger snap ring, steel wire rope is connected with a truck crane suspension hook, with tower crane, anode module is sling to distance ground 800mm ~ 1m height, truck crane slowly hooks up and stressed anode module is winched to inclination, crane hook slowly declines, until anode module level, then truck crane, tower crane slowly descends hook to complete flange, directly each face of anode module is guaranteed point-blank by tower crane hoisted in position wooden unit adjustment anode module after anode module flange,
6) anode module rear application plumb bob in place measures the perpendicularity of each anode module, does not meet quality requirement obtain anode module for perpendicularity, adjusts anode module perpendicularity until meet quality requirement with oil top by after anode module jack-up by increase and decrease backing plate quantity;
7) start anode module grounding construction after the installation of anode module, the material that anode module ground adopts is SS2205 corrosion resistant plate, with bolts between module and module, makes a circle outward and is directly connected with steelframe;
8) anode module sealing is divided into top seal and lower seal, lower seal FRP plate and resin directly seal, top seal adopts the FRP Ω mould be shaped, and by Ω mould, anode module and wallboard is linked up then by glass fibre and resin seal; Construction method is the same with anticorrosion FRP stickers lining, and the general hand that adopts sticks with paste method, and stickers lining sequence of construction should first facade back plane, first up and then down, from inside outwards, and the end after first wall.The sealing technology of anode module is the same with anticorrosion process.
Further, described cathode line is installed and is comprised the following steps:
1), before cathode line is installed, the installment work of the subregion dividing plate between each electric field should first be completed; Subregion dividing plate is fixed on upper box truss by U-bolt, and subregion dividing plate is installed and adopted crane to be directly lifted on upper box truss, then by artificial installation in position;
2) cathode line is in installation process, each three groups of personnel of each electric field, above two groups, below one group, above two groups of totally four people, one group of three people, one group of one people, below one group of two people set about up and down simultaneously; Notice that three people one group transmits cathode line and prevents flexural deformation;
3) cathode line is installed the method taking three groups of workmens simultaneously to construct and is constructed, cathode line top arranges 2 groups of workmens, cathode line hangs on cathode line upper frame by one group of workmen temporarily, other one group of workmen determines the position of cathode line with preprepared mould, then uses spanner fastening bolt.Upper cathodic line location fastening good after, the position on the positioned in sequence cathode line top that cathode line bottom arranges one group of workmen fastening along cathode line top fastening bolt, identical with cathode line top construction method.Bolted can not too be exerted oneself, and prevents from causing cathode line distortion.
Further, it is install secondary-atomizing pipeline and nozzle on the truss of reducer circumference joint that described secondary-atomizing system is installed; Its method of quality control is:
1) welding manner controls: adopt full argon arc welding when ground assembly welding, guarantee weld bond quality;
2) in installation process, stringent technical is told somebody what one's real intentions are and process control: in a pre-installation nozzle is pulled down preservation, prevents loss, destroys; Carry out technological guidance when mounted, collision free and installation site
mistake; After installation in position, first pipeline is purged and water flushing with compressed air, guarantees cleannes:
3) leak test is carried out to pipeline, atomizing effect test is carried out to nozzle; Pipe installing after having rinsed, interim pipe laying booster system, adherence pressure is 1.25 times of pipeline operating pressure, and whether check system valve, pipeline leak, and in 10 minutes, whether pressure has pressure drop, confirms the tightness of pipeline.After tightness test, carry out nozzle atomization measure of merit; During test atomizing effect, whether control pipeline pressure detecting atomizing effect by pipeline pressure influence, whether operating pressure atomizing effect is best.
The invention has the advantages that:
The present invention formulates rational installation procedure according to the design feature of wet electrical dust precipitator, normal line method, particular manufacturing craft is adopted to control the method for anode module perpendicularity and anode module and cathode line spacing, solve the problem that cathode and anode spacing is difficult to adjust, and adopt argon arc welding, blowing pipeline, system are rinsed, the method for leak test and spray test, control secondary-atomizing system installation quality and nozzle cleaning degree; Adopt the method for infiltration test and spark test by Controlling Technology flow process, control the quality of sealing and anticorrosion process.
Detailed description of the invention
The present invention is set forth further below in conjunction with specific embodiment.
Embodiment one
A kind of thermal power generation Wet-type electric dust removal system installation method, merotomizes thermal power generation Wet-type electric dust removal system device, adopts substep combined hanging, installs and the method for anticorrosion cross-operation; Sequence of construction is taked first framework, rear body, and from outside to inside, installation coordinates anticorrosion, and the construction principle of anticorrosion interspersed installation is installed.
Described substep combined hanging, installation and anticorrosion cross-operation are installed according to the following sequence of operation:
1) preparation of construction
2) body frame is installed
3) housing is installed
4) thermal insulating cylinder is installed
5) anticorrosion
6) cathode hanger bottom install crossbeam (comprising cathode line lower frame)
7) anode module is installed (comprising plus earth and the sealing of anode module top and the bottom)
8) cathode hanger top install crossbeam (comprising cathode line upper frame)
9) cathode line is installed
10) roof spray system is installed
11) cathode line adjustment
12) secondary-atomizing system is installed
13) check and accept.
Concrete installation steps and method as follows:
1, preparation of construction
Construction machinery, equipment, personnel, work facility,
figurepaper prepares to put in place.
2, body frame is installed
Body frame is installed should first after ground completes burst work in combination, then hoisted in position, and lifting selects 25t building tower crane with main force's loop wheel machine.Body frame lifting should be noted following some:
1) select combiner according to crane operating mode, need repeatedly calculate component weight and check, prevent overload accidents caused.
2) in the process of body frame ground combination, need check number of devices, size crosschecks, peventing member lacks or mistakes.
3) combiner needs firm welding, and need carrying out bolt that high-strength bolt connects is just tight, forbids spot welding and temporary fixed.
4) before sub-assembly lifting, need to have set up cat ladder at sub-assembly in advance, need high-altitude construction part to set up good shelf, convenient construction.
3, housing is installed
Housing is installed and is comprised reducer circumference joint, upper lower box and internal truss frame installation.From bottom to top be respectively reducer circumference joint, lower box and truss, upper box and truss, be connected by non-metal expansion joint with desulfuration absorbing tower under reducer circumference joint, internal truss frame is furnished with secondary-atomizing pipeline, lower box inside is anode module, it is distributed on lower box truss, have one deck distribution grid in its underpart, upper box internal structure is cathode line and top spray pipe-line system.Cathode line and anode module are divided into 4 regions by PP plate, are commonly called as 4 electric fields.Housing is installed and is taked ground combined hanging, reduces hoisting engineering amount, reduces installation at high altitude difficulty, and lifting machine adopts 25t building tower crane.Because wet-esp inside need all be made of glass flake anticorrosion, in order to the reduction of erection time, avoid high-altitude to set up springboard, assembly is welded on ground and polishes and setting up springboard on truss.
4, thermal insulating cylinder is installed
The Main Function of thermal insulating cylinder is that it comprises porcelain vase base, porcelain vase, electric heater for negative electrode beam suspended support and electric field boosting, cylindrical shell has hot-air blowing pore and temperature detection hole and porcelain vase base adjust screw hole.Thermal insulating cylinder is installed and is taked single-piece lift, interior heater and porcelain vase and negative electrode beam suspension rod can when lifting together with lift, the minimizing lifting time, after the installation of thermal insulating cylinder, in
portion's methodblue faying face with FRP or acid-resisting sealant sealing, can ensure airtight quality further.
5, anticorrosion
Anticorrosion is a key link of wet-esp installation, forbids to get angry during anticorrosive construction, and its construction period generally needs 10 to 15 days time and larger by weather effect.Anticorrosive construction operation is: housing inspection → matrix blasting treatment → prime (point twice brushing, twice face
look brightaobvious different, mutually vertically) → clay smear → local FRP strengthens (position such as wallboard, truss angle) → quality testing and repairs examination → finish paint brushing → comprehensively check and accept.Anticorrosive construction is taked segmentation and slicing construction, the construction of key area emphasis, is carried out with the mode of installing crossed construction round the clock.For reducing anticorrosive construction difficulty and accelerating anticorrosive construction speed, improve anti_corrosion construction quality, anticorrosive construction takes ground corrosion-resistant mode to carry out, and carries out anticorrosion on ground by upper lower box truss and wallboard on ground, need welding position to reserve, enter again after treating welding in place
row preventing localrotten reparation, substantially increases anticorrosive construction speed and anti_corrosion construction quality, saves the duration.Anticorrosion examination and detection method are as follows successively:
1) estimate: require that anticorrosive coat surface integral is even, smooth, without holiday, without obvious especially uneven situation.
2) Thickness sensitivity: carry out Thickness sensitivity by electromagnetic thickness tool, at least surveys 3 points for every square metre.
3) electric spark detects: carry out 100% comprehensive Pinhole by electric spark detector to anticorrosive coat, should carry out in time repairing when discovery exists pin hole until detected by electric spark qualified till.The voltage that electric spark detects is 8000V, (often increases 1mm and detects voltage increase 3000V.
6, cathode hanger bottom install crossbeam
1) Main Function of beam is for cathode line load-bearing, and negative electrode beam is across whole electric field, and lifting adopts gradient method lifting, namely by adjustment gradient by negative electrode beam slowly movement reach on-station position, wherein hang the convenient adjustment of cucurbit by wall bushing one end.
2) after the installation of lower cathodic beam, start to lift cathode line lower frame, cathode line lower frame, primarily of angle steel and bolt composition, for hanging cathode line, has 16 groups.The lifting of cathode line lower frame is directly pre-stored on negative electrode beam.
7, anode module is installed
1) anode module is by being made by handwork, and size exists part deviation, and anode module should measure the size (long and wide) of each anode module before installing, and detailed pen and paper record each anode module sized data also carry out mark.
2) by level measurement anode module fulcrum lower box truss levelness, because truss surface completes anticorrosive construction, its air spots, and there is error when installing, the FRP backing plate of multi-thickness specification (1mm, 2mm, 5mm) should be made for adjusting anode module.
3) in anode module, the length and width of anode module and the mark of center is carried out.Lower box truss finds anode module fulcrum on-station position center and carries out mark.
4) determined the installation site of each anode module by contrast, start to lift anode module after anode module fulcrum place being leveled up with FRP backing plate.According to mark adjustment anode module position, guarantee each anode module point-blank.
5) need in anode module hoisting transport process to carry out flange process.Because anode mold bulk matter is FRP, for preventing colliding in turn-up process, specific process is adopted to carry out flange, method for flanging is: the spacing first making a set of " fringed iris herb " " fringed iris herb " upper left and right two hangers is identical with the spacing of the hanger of anode module both sides, " fringed iris herb " top hanger snap ring steel wire rope is connected with crane hook, below hanger uses snap ring respectively, steel wire rope is connected with anode module top hanger, anode module bottom hanger snap ring, steel wire rope is connected with a truck crane suspension hook, with tower crane, anode module is sling to distance ground 800mm ~ 1m height, truck crane slowly hooks up and stressed anode module is winched to inclination, crane hook slowly declines, until anode module level, then truck crane, tower crane slowly descends hook to complete flange, directly each face of anode module is guaranteed point-blank by tower crane hoisted in position wooden unit adjustment anode module after anode module flange.
6) anode module rear application plumb bob in place measures the perpendicularity of each anode module, does not meet quality requirement obtain anode module for perpendicularity, adjusts anode module perpendicularity until meet quality requirement with oil top by after anode module jack-up by increase and decrease backing plate quantity.
7) start anode module grounding construction after the installation of anode module, the material that anode module ground adopts is SS2205 corrosion resistant plate, with bolts between module and module, makes a circle outward and is directly connected with steelframe.
8) anode module sealing is divided into top seal and lower seal, lower seal FRP plate and resin directly seal, top seal adopts the FRP Ω mould be shaped, and by Ω mould, anode module and wallboard is linked up then by glass fibre and resin seal.Construction method is the same with anticorrosion FRP stickers lining, and the general hand that adopts sticks with paste method, and stickers lining sequence of construction should first facade back plane, first up and then down, from inside outwards, and the end after first wall.The sealing technology of anode module is the same with anticorrosion process.
8, top install crossbeam is hung
1) to hang install crossbeam method identical line top hanging install crossbeam method and cathode line bottom, installed together by cathode line conductive plate, first remove the shelf of upper box in a pre-installation and complete anticorrosion examination during lifting.
2), after hanging install crossbeam in negative electrode top completes, install cathode line upper frame, cathode line upper frame installation method is identical with cathode line lower frame installation method.
3) adjust cathode line top and the bottom frame position with plumb bob and negative electrode string holes center, anode module diagonal angle, rear suspension rod in place is fixed.
9, cathode line is installed
1) before cathode line is installed, first should complete the installment work of the subregion dividing plate between each electric field, subregion dividing plate is a kind of square plate of PP material, and its Main Function is the short circuit in flushing with discharge process for preventing each electric field.It is fixed on upper box truss by U-bolt, and subregion dividing plate is installed and adopted crane to be directly lifted on upper box truss, then by artificial installation in position.
2) cathode line is a kind of acupuncture line growing nearly 5m, is covered with prickle above, easily pricks the hand, have certain flexibility, in installation process, each three groups of personnel of each electric field, above two groups, below one group, two groups of totally four people above, one group of three people, one group of one people, below one group of two people set about up and down simultaneously.Notice that three people one group transmits cathode line and prevents flexural deformation.
3) cathode line is installed the method taking three groups of workmens simultaneously to construct and is constructed, cathode line top arranges 2 groups of workmens, cathode line hangs on cathode line upper frame by one group of workmen temporarily, other one group of workmen determines the position of cathode line with preprepared mould, then uses spanner fastening bolt.Upper cathodic line location fastening good after, the position on the positioned in sequence cathode line top that cathode line bottom arranges one group of workmen fastening along cathode line top fastening bolt, identical with cathode line top construction method.Bolted can not too be exerted oneself, and prevents from causing cathode line distortion.
10, roof spray system is installed
The Main Function of roof spray system is to clear up the particle such as dust, PM2.5 in anode module.Roof spray system comprises support of pipelines, PP pipe, nozzle etc.It is positioned at above cathode line, is evenly distributed among four electric fields, each electric field three showers, and every root shower (PP pipe) is furnished with 16 nozzles.Shower is PP material, the nearly 16m of length, from the side sleeve pipe place is held in advance successfully by wallboard and penetrate upper box inside during installation, be placed on bracket, after adjustment rear nozzle angle, with bolt by temporary fixed to casing flange and shower flange, facilitate the outside spray piping installation of dedusting.After shower installs, shower and bracket pipe clamp are fixed (pipe clamp and bolt are PP material), then nozzle is installed.Note not neglected loading, when preventing from spraying for a long time, the water yield is too many, and target line impacts, and affects electric field boosting effect.After roof spray system installation, by clean for inner for deduster garbage-cleaning, top exit smoke box lifting buckle closure.
11, cathode line adjustment
Cathode line adjustment construction and method of quality control as follows:
1) strictly anode module and cathode line upper and lower frames construction quality and the course of receiving is controlled.Specific construction program is shown in anode module and top and the bottom frame construction.
2) for the feature of cathode line soft pliable song distortion, when cathode line is installed, many people should be arranged to transmit construction, prevent distortion, and in work progress, send special messenger to supervise and guide.
3) make full use of professional tool, guarantee installation quality.With cathode line adjustment mould coordinative construction in installation process, improve once mounting qualification rate.
4) focus on checking and check.Block-shaped according to anode mold, finish each electric field cathode line and divide cloth specimen
figure, utilize intercom, bright light torch, cathode line to adjust mould etc., divide into groups to check the cathode line of each electric field, check, adjust.Confirm whether inner rubbish, glass wool cloth etc. are cleaned out, check whether cathode line is in place, and guarantees cathode line installation quality.
12, secondary-atomizing system is installed
Secondary-atomizing Pipe installing position is on the truss of reducer circumference joint, and it is primarily of one group of stainless steel square pipeline and nozzle composition.The Main Function of secondary-atomizing system for reducing dust pelletizing system top spray washing time, thus reduces water consumption.It plays very important role in wet scrubber running, and its stable operation can save wet-esp water consumption greatly, creates economic benefit, strictly should control construction quality in work progress.Its method of quality control is:
1) welding manner controls.Adopt full argon arc welding when ground assembly welding, guarantee weld bond quality.
2) in installation process, stringent technical is told somebody what one's real intentions are and process control.In a pre-installation nozzle pulled down preservation, prevent loss, destroy.Carry out technological guidance when mounted, collision free and installation site
mistake.After installation in position, first pipeline is purged and water flushing with compressed air, guarantee cleannes.
3) leak test is carried out to pipeline, atomizing effect test is carried out to nozzle.Pipe installing after having rinsed, interim pipe laying booster system, adherence pressure is 1.25 times of pipeline operating pressure, and whether check system valve, pipeline leak, and in 10 minutes, whether pressure has pressure drop, confirms the tightness of pipeline.After tightness test, carry out nozzle atomization measure of merit.During test atomizing effect, whether suitably can control pipeline pressure detecting atomizing effect by pipeline pressure influence, whether operating pressure atomizing effect is best.Atomizing effect can be tested several times more, guarantees best results.
13, check and accept
After every system installation, should check and accept in strict accordance with Quality checking and accepting standard and assessment routine.Manhole can be closed after acceptance(check).
Above-mentioned listed embodiment, just carries out clear, complete description to technical scheme of the present invention; Obviously, described embodiment is only this
inventiona part of embodiment, instead of whole embodiment.Based on this
inventionin embodiment, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to this
inventionthe scope of protection.
The invention has the advantages that:
The present invention formulates rational installation procedure according to the design feature of wet electrical dust precipitator, normal line method, particular manufacturing craft is adopted to control the method for anode module perpendicularity and anode module and cathode line spacing, solve the problem that cathode and anode spacing is difficult to adjust, and adopt argon arc welding, blowing pipeline, system are rinsed, the method for leak test and spray test, control secondary-atomizing system installation quality and nozzle cleaning degree; Adopt the method for infiltration test and spark test by Controlling Technology flow process, control the quality of sealing and anticorrosion process.
The present invention mainly contains following Some features:
1, because wet scrubber adds inner anticorrosion compared with conventional dry deduster, working procedure increase, construction period growth is caused.According to the design feature of wet scrubber, construction method adopts combined hanging, installs and the method for anticorrosion cross-operation, greatly shortens construction period.Sequence of construction is taked first framework, rear body, and from outside to inside, installation coordinates anticorrosion, the construction principle of anticorrosion interspersed installation, and polish in ground, ground is anticorrosion, the problem that during solving traditional anticorrosive construction, installment work can not be constructed.
2, for solving the problem that yin, yang line is difficult to adjust, the method controlling anode module perpendicularity is adopted to reduce difficulty of construction.First by measuring, recording the levelness of each anode module size and the anode module strong point, determine anode module mounting location, then carry out measuring and adjust anode module perpendicularity with plumb bob, You Ding and FRP backing plate, then control the spacing of anode module and cathode line with particular manufacturing craft.
3, for controlling secondary-atomizing system installation quality and nozzle cleaning degree, take process instruction and supervision, by purging pipeline, full argon arc welding, system water flushing controls installation quality.By carrying out leak test and spray test, detect installation quality and nozzle cleaning degree.
4, for ensureing the quality of sealing and anticorrosion process, by the strict control to sealing and anticorrosion process flow process, with infiltration test and spark test, sealing property and anticorrosion thickness being detected, guaranteeing sealing and anticorrosion process quality.
Claims (10)
1. a thermal power generation Wet-type electric dust removal system installation method, is characterized in that: merotomized by thermal power generation Wet-type electric dust removal system device, adopts substep combined hanging, installs and the method for anticorrosion cross-operation; Sequence of construction is taked first framework, rear body, and from outside to inside, installation coordinates anticorrosion, and the construction principle of anticorrosion interspersed installation is installed.
2. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 1, is characterized in that: described substep combined hanging, installation and anticorrosion cross-operation are installed according to the following sequence of operation:
Body frame is installed
Housing is installed
Thermal insulating cylinder is installed
Anticorrosion
Cathode hanger bottom install crossbeam
Anode module is installed
Cathode hanger top install crossbeam
Cathode line is installed
Roof spray system is installed
Cathode line adjusts
Secondary-atomizing system is installed
Check and accept.
3. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 2, is characterized in that: described housing is installed and comprised reducer circumference joint, upper lower box and internal truss frame installation; From bottom to top be respectively reducer circumference joint, lower box and truss, upper box and truss, be connected by non-metal expansion joint with desulfuration absorbing tower under reducer circumference joint, internal truss frame is furnished with secondary-atomizing pipeline, lower box inside is anode module, anode module is distributed on lower box truss, have one deck distribution grid in its underpart, upper box internal structure is cathode line and top spray pipe-line system; Cathode line and anode module are divided into 4 regions by PP plate; Housing lifts after installing and taking ground to combine respectively, and lifting machine adopts 25t building tower crane; Assembly welded on ground simultaneously and polish and setting up springboard on truss.
4. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 2, is characterized in that: described thermal insulating cylinder is installed and taked single-piece lift, lifts together with when interior heater and porcelain vase and negative electrode beam suspension rod are in lifting; After the installation of thermal insulating cylinder, internal flange faying face FRP or acid-resisting sealant sealing, ensure airtight quality further.
5. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 2, it is characterized in that: described anticorrosive construction operation is: housing inspection → matrix blasting treatment → prime, divide twice brushing, twice color is obviously different, and mutually vertical → clay is smeared → local FRP reinforcements → quality testing and the brushing of repairing examination → finish paint → check and accept comprehensively; Anticorrosive construction is taked segmentation and slicing construction, the construction of key area emphasis, is carried out with the mode of installing crossed construction round the clock.
6. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 5, it is characterized in that: anticorrosive construction takes ground corrosion-resistant mode to carry out, on ground, upper lower box truss and wallboard are carried out anticorrosion on ground, need welding position to reserve, after treating welding in place, carry out the anticorrosion reparation in local again; Anticorrosion examination and detection method are as follows successively:
1) estimate: require that anticorrosive coat surface integral is even, smooth, without holiday, without obvious especially uneven situation;
2) Thickness sensitivity: carry out Thickness sensitivity by electromagnetic thickness tool, at least surveys 3 points for every square metre;
3) electric spark detects: carry out 100% comprehensive Pinhole by electric spark detector to anticorrosive coat, should carry out in time repairing when discovery exists pin hole until detected by electric spark qualified till; The voltage that electric spark detects is 8000V, often increases 1mm and detects voltage increase 3000V.
7. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 2, is characterized in that: described anode module installation kit draws together following steps:
1) anode module is by being made by handwork, and size exists part deviation, and anode module should measure the size (long and wide) of each anode module before installing, and detailed pen and paper record each anode module sized data also carry out mark;
2) by level measurement anode module fulcrum lower box truss levelness, because truss surface completes anticorrosive construction, its air spots, and there is error when installing, adopt the FRP backing plate of multi-thickness specification for adjusting anode module;
3) in anode module, the length and width of anode module and the mark of center is carried out; Lower box truss finds anode module fulcrum on-station position center and carries out mark;
4) determined the installation site of each anode module by contrast, start to lift anode module after anode module fulcrum place being leveled up with FRP backing plate; According to mark adjustment anode module position, guarantee each anode module point-blank;
5) flange process is carried out in anode module hoisting transport process; Because anode mold bulk matter is FRP, for preventing colliding in turn-up process, crane is adopted to carry out flange;
6) anode module rear application plumb bob in place measures the perpendicularity of each anode module, does not meet quality requirement obtain anode module for perpendicularity, adjusts anode module perpendicularity until meet quality requirement with oil top by after anode module jack-up by increase and decrease backing plate quantity;
7) start anode module grounding construction after the installation of anode module, the material that anode module ground adopts is SS2205 corrosion resistant plate, with bolts between module and module, makes a circle outward and is directly connected with steelframe;
8) anode module sealing is divided into top seal and lower seal, lower seal FRP plate and resin directly seal, top seal adopts the FRP Ω mould be shaped, and by Ω mould, anode module and wallboard is linked up then by glass fibre and resin seal; Construction method is the same with anticorrosion FRP stickers lining, and the general hand that adopts sticks with paste method, and stickers lining sequence of construction should first facade back plane, first up and then down, from inside outwards, and the end after first wall; The sealing technology of anode module is the same with anticorrosion process.
8. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 7, it is characterized in that: described employing crane carries out flange and is: the spacing first making a set of " fringed iris herb " " fringed iris herb " upper left and right two hangers is identical with the spacing of the hanger of anode module both sides, " fringed iris herb " top hanger snap ring steel wire rope is connected with crane hook, below hanger uses snap ring respectively, steel wire rope is connected with anode module top hanger, anode module bottom hanger snap ring, steel wire rope is connected with a truck crane suspension hook, with tower crane, anode module is sling to distance ground 800mm ~ 1m height, truck crane slowly hooks up and stressed anode module is winched to inclination, crane hook slowly declines, until anode module level, then truck crane, tower crane slowly descends hook to complete flange, directly each face of anode module is guaranteed point-blank by tower crane hoisted in position wooden unit adjustment anode module after anode module flange.
9. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 2, is characterized in that: described cathode line is installed and comprised the following steps:
1), before cathode line is installed, the installment work of the subregion dividing plate between each electric field should first be completed; Subregion dividing plate is fixed on upper box truss by U-bolt, and subregion dividing plate is installed and adopted crane to be directly lifted on upper box truss, then by artificial installation in position;
2) cathode line is in installation process, each three groups of personnel of each electric field, above two groups, below one group, above two groups of totally four people, one group of three people, one group of one people, below one group of two people set about up and down simultaneously; Notice that three people one group transmits cathode line and prevents flexural deformation;
3) cathode line is installed the method taking three groups of workmens simultaneously to construct and is constructed, cathode line top arranges 2 groups of workmens, cathode line hangs on cathode line upper frame by one group of workmen temporarily, other one group of workmen determines the position of cathode line with preprepared mould, then uses spanner fastening bolt; Upper cathodic line location fastening good after, the position on the positioned in sequence cathode line top that cathode line bottom arranges one group of workmen fastening along cathode line top fastening bolt, identical with cathode line top construction method; Bolted can not too be exerted oneself, and prevents from causing cathode line distortion.
10. thermal power generation Wet-type electric dust removal system installation method as claimed in claim 2, is characterized in that: it is install secondary-atomizing pipeline and nozzle on the truss of reducer circumference joint that described secondary-atomizing system is installed; Its method of quality control is:
1) welding manner controls: adopt full argon arc welding when ground assembly welding, guarantee weld bond quality;
2) in installation process, stringent technical is told somebody what one's real intentions are and process control: in a pre-installation nozzle is pulled down preservation, prevents loss, destroys; Carry out technological guidance when mounted, collision free and installation site mistake; After installation in position, first pipeline is purged and water flushing with compressed air, guarantees cleannes:
3) leak test is carried out to pipeline, atomizing effect test is carried out to nozzle; Pipe installing after having rinsed, interim pipe laying booster system, adherence pressure is 1.25 times of pipeline operating pressure, and whether check system valve, pipeline leak, and in 10 minutes, whether pressure has pressure drop, confirms the tightness of pipeline; After tightness test, carry out nozzle atomization measure of merit; During test atomizing effect, whether control pipeline pressure detecting atomizing effect by pipeline pressure influence, whether operating pressure atomizing effect is best.
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| CN112024127A (en) * | 2020-07-30 | 2020-12-04 | 上海二十冶建设有限公司 | Method for mounting cathode hanger of sintering electric dust remover |
| CN112024127B (en) * | 2020-07-30 | 2022-07-08 | 上海二十冶建设有限公司 | Method for mounting cathode hanger of sintering electric dust remover |
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