In circular fluid-bed boiler, the solid stock chroma inside circular fluid-bed boiler is coal fines boiler a few times to about a hundred times, mix as a result of the tall grain chroma inside boiler high moving wind speed, flue gas velocity of flow bigger, grain is thicker, make fireproof material gets of many solid stock erode ceaselessly wear away, because this is fireproof of material prevent grind a problem to should take seriously particularly. Fireproof preventing the installation that grinds a structure is the key that normal, safety runs concern unit. Fireproof and pouring in the construction process of makings, get each respect the impact is bigger, because this wants all-around control. Fireproof and pouring makings from custodial, examine, installation of refractory steel muscle, expand installation of seamed installation, wooden model configuration, agitate, brace up dozen, roast wait for link special key, press program construction strictly. The note answers in talking about construction with respect to a few crucial link.
1, of fireproof material custodial
The fireproof material sort that is used at circular fluid-bed boiler is more, different position uses the data of different type. Material classification piles up orderly, have apparent mark card. Fireproof material severe bear is wet, should have made moistureproof step. Should notice boiler is pouring at the same time if makings period of efficacy already exceeded this time limit, should have a test, the ability after the experiment is eligible is used.
2, of fireproof material examine
Material is opposite in time to spot hind data certificate examination, each index arrives technical requirement; Notice the manufacturing time of the product and period of efficacy, exceed the material taboo of period of efficacy. The seasonable organization is seasoned boiler setting technician after material enters the arena, the data that provides by manufacturer and Electricity Department " quality inspection of construction of igneous telegram construction and criterion for evaluation " make test block. Fireproof material examines effectively report qualification is rear can use.
3, the installation of refractory steel muscle
Refractory steel muscle undertakes spectral analysis in time to spot hind, whether does examination material accord with a requirement character. Arrange to assure refractory steel muscle orderly, beautiful, in need to decorate position of reinforcing steel bar to use the line in a carpenter's ink marker to press design distance to undertake freely puts a line by design distance, on-line contact place solders refractory steel muscle the Xiang Huo face in equipment, arrange network of reinforcing steel bar. Before solder, refractory steel muscle and metallic housing weld, application burnishs machine burnish, divide clean ferruginous with paint, assure to solder good, without weld defects.
4, expand seamed installation
Structure of boiler setting of boiler of fluid-bed of loop of demonstrative power station of 1*300MW of Sichuan Bai Ma is designed for French ALSTON company. This boiler designed the job to seam. The job is seamed by be less than by area of rice of 1 meter of *1 all around design, the structure that this job seams is decorated for wrong tooth, and be in pouring the Xiang Huo face of makings, the job is seamed have 10mm tall, 90 degrees of groove with wide 20mm, in body of boiler setting wall at the same time mid job is seamed between the pottery and porcelain that fills 2mm board. It is OK that this job is seamed compensation is fireproof when high temperature pouring of makings small expand, prevent pouring makings surface crackle. Because this is fireproof and pouring,the construction of makings cannot undertake making the construction of a large area, divide into many lesser work area however cent piece undertakes construction, every area is less than 1000mm*1000mm, namely big pouring the area is unfavorable be more than 1m2. Difficulty of construction of this kind of design is greater, to make sure wrong tooth job is seamed, pouring the construction of makings divides an a certain number of layers to undertake pouring, at the same time every undertake bouncing space construction, the ability after the rest part waits for wooden model to demolish undertakes next construction, work efficiency is low. In the meantime, want to take effective measures to assure the appearance that the job seams on wooden model configuration.
5, wooden model configures installation
Pouring the key of stand or fall of quality depends on the configuration of wooden model and installation. Because circular fluid-bed boiler is pouring makings is pouring the range is wide, appearance is irregular, wooden moulding is made and installation workload is big, difficulty is tall. So, need organizes the advanced carpentry with technical strong, seasoned capability to undertake construction. The data that should use qualification makes pattern plate, ying Qingjie of wooden model surface is smooth, or pattern plate can become stickup, or in the contact the dot turns into poriferous. Because partial structure has arc, after finished product of wooden moulding consummate, hard to avoid has the place with lax flat-fell seam, must stick on one with heal wide adhesive plaster at this moment.
6, agitate
Agitate, pouring, brace up hitting is a successive working procedure, what should assure the job is successive, dominate good construction time. Fireproof material agitate, make pouring the mixture of makings is even. Agitate is very important process, because it is right,liner quality has conclusive effect. Nice agitate gift assures the attribute of fireproof material. Time of agitate equipment, agitate and the capacity that add agitate juice very important. If make mistake in this link, what installation uses is fireproof irrigate build material will the result that short of expects.
6.1, agitate equipment is fireproof irrigate build material to have mix by impeller beater normally, the mixture that impeller beater can ensure adhesive is good. It is 6 ～ 8mm from housing clearance in mixer lamina of home normally, fireproof and pouring the aggregate of makings is less than 6mm commonly, the clearance between the lamina of mixer and housing suits quite for 2mm ～ 3mm, to assure material blend adequately, the spot has should undertake adjustment to blade clearance, improve.
6.2, what agitate time differs is fireproof and pouring the time of feed mix is different, general and pouring the agitate time of makings is 4 minutes, but time of agitate of a little fireproof material makes an appointment with 6 minutes, because the adhesive need of this material is long,agitate just can mix completely.
6.3, agitate order is to satisfy in agitate process, what fireproof material expects is even distributing, dry below the circumstance that does not have water agitate second of 30 seconds ~60, fireproof irrigate build material to undertake doing mix before adding water, what can offset during carrying, the likelihood is kept apart so is dry irrigate the influence that builds material. Add the water of 80% next. The rest of water, want to be measured carefully, in order to be added to the effect of beautiful. Agitate hind undertakes viscosity is checked, whether can be present condition used at installation with checking its.
To be being used at fireproof and pouring the water of feed mix should undertake sampling sends check, agitate fluid asks to should accord with a technology to set target with the quality of water. But add water to estimate the range in the regulation. Accordingly, should detect at any time fireproof and pouring the dry humidity of makings and appropriate water. Temperature of lukewarm to water afternoon, environment, material temperature has every sky measure, have a record.
7, brace up pound
Pouring makings tamp is even and close-grained. Outside expecting except fireproof spray, all fireproof irrigate build material to undertake brace up dozen, brace up dozen (tamp) advantage depends on reducing the hole that installs fireproof material, in order to add stress. Use insert type brace up dozen implement, should take out slowly brace up dozen implement so that do not have,hole leaves on fireproof material. If send existing and many fireproof material cave in to produce a lot of small blister,be in apparently, explain brace up dozen good. Be like occurrence boiling, should stop brace up dozen, because have,produce the risk of segregate.
Right already the fireproof stuff with good agitate should undertake instantly pouring. If irrigate,build area too big so that fireproof material perfusion enters successive fireproof material layer, criterion irrigate build division into districts to be divided into many area, accordingly the setting has the job to seam, in order to make front row second irrigate the time interval that build and adds fireproof material the 2nd times not to exceed 20 minutes, in order to ensure between successive layer stick effectively receive. Of average data can apply work time to be 30 minutes or so. The agitate that construction control asks to had controlled every dishes of makings according to using the technology of material and from the time that gives expect to give out (it is 30 minutes commonly) ; If apply man-hour to exceed this time,not gone makings wants to fall stoutly, do not allow reuse, the surface that wear a layer is prevented to will appear when drying-out otherwise great flaw. If this link was not controlled good, affect the quality of construction not only, return a large number of waste that can create material.
8, form removal, roast
Pouring demolish module after makings is sclerotic. Below normal temperature, can demolish module normally after 12 hours. Should undertake before form removal hammer attacks sound test first. If on fireproof liner material hammer knocks a ringing sound, prove the sclerosis with fireproof already effective material, can demolish module.
Stoving presses fireproof material strictly roast curve is carried out, control good temperature. This pace is operated should special caution. If operate liner of undeserved meeting attaint. Heating speed depends on ply of the type of fireproof material, liner and design are characteristic.
Fireproof wear-resisting construction measures circular fluid-bed boiler bigger, link is more, involve an area wide, quality demand is high, appearance of equipment interior structure is irregular. Fireproof adventitious pouring the key that the construction of makings is installation of circular fluid-bed boiler, also be difficulty, accordingly, should give height takes seriously. Execution condition prepares to want sufficient, if get the materials ready, of model of the eligible source of water that construction uses, wood make, the metal such as refractory steel muscle program of carriage passageway of installation, material, illume, material is deposited, test block experiment, special class is implemental a series of jobs such as preparation, Training Within Industry want beforehand survey, of each link join each other should have careful plan.
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