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15MT Dual Cylinder Assembled Steam Boiler
Specifications:1) Model: SZL15-1.25-AII coal steam boiler2) Rated evaporation: 15MT/h3) Pressure: 1.25MPa4) Saturated steam temperature: 194oC5) Water supply temperature: 105oC6) Thermal efficiency: 78%7) Tested thermal efficiency: 82.39%8) Hearth capacity: 643.8m39) Outer size (L x W x H): 10.942 x 4.72 x 6.72m10) Effective grate area: 17.25m211) Fuel category: soft coal IIThe boiler is with a dual cylinder longitudinal structure and natural cycle methods consisting of the upper components with the dominant main parts. The lower components are primarily the combustion equipment. The two main parts can be instantly installed and manufactured. Only the boiler wall and back arc of the upper and low main parts need to be constructed. Connect the smoke wind tunnel with the pipeline, meter, valve and the coal saver before pouring the front arc.Structure:1) Upper and lower cylinder diameter: φ 900mm2) Cylinder central distance: 2,300mm3) 7 Left-right cabinets: φ219mm4) Level central distance: 2,800mm5) Hearth water cooling wall pitch: 67mm6) Convection check distance: 90 x 120mm7) The front wall is connected by two bars of ascending tubes inducedfrom the boiler cylinder and front concentration cabinet8) The boiler check and the water cooling wall are welded and connectedwith the upper and lower cylindersCombustion equipment:1) Light chain-grate stoker2) Width: 2,300mm3) Effective area: 17.25m24) Nine independent wind storage cabinets5) Dual-side air inlet ash door6) Brick boiler arc7) Front water cooling arc and level angle are 20o8) Outlet height: 1,320mm9) Back arc outlet height: 1,009mm10) Front-back arc coverage rates are 21% and 47%11) Good smoke leading ability12) Reasonable inner combustion with the front arcDesign features:1) After extensive selection, the vertical hose boiler is easily defined andsymmetrical facilitating manufacture and maintenance. It is with compactsize and low metallic consumption, great water capacity and largeconvection heat transfer coefficient2) The configuration of the water cool wall structure varies with the heatload on the boiler wall. The hearth section is airproof. The outer tubeneeds to be buried with the boiler wall. The pitch of the convectionsection is 90o. The utilization of δ40 firebrick at the outer tubemakes the wall structure quite reasonable3) The down-pull water cooling wall are general found on the bulk boilerfor the front arc structure, fire-resistant concrete is poured to improvethe working environment of the front arc and to settle the problem ofindustrial collapse. The usage life is increased. The back arc is built ofarc with adjustable coverage. Therefore, the adaptability of theburning coal categories is extensive4) The main upper part of convection check smoke orientation device iswith the form of rotation. The smoke granules can fall into the ashoutlet to the grate, thus the initial dust exhaust density is greatlyreduced as well as the convection wear, improving the usage life of theboiler. The transformation of the smoke may increase the time of heattransfer within the boiler. 380 maintenance channels are reserved atthe two sides, mixing the smoke fully in burning. In this way, the heattransfer efficiency is improved. It is also possible for the maintenancestaff to enter the check for examination. This advantage is incomparable
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