影響1噸燃?xì)忮仩t燃燒狀態(tài)因素有哪些？
What are the factors affecting the combustion of a ton of gas boilers?
一是1噸燃?xì)忮仩t爐排面積小。該爐排寬度不能使單位時(shí)間內(nèi)進(jìn)入爐排的燃料達(dá)到該設(shè)計(jì)參數(shù)下所需的耗煤量，即鍋爐產(chǎn)生熱量和高溫?zé)煔饬颗c設(shè)計(jì)出力要求的遠(yuǎn)遠(yuǎn)不足，其結(jié)果必然是壓力、蒸發(fā)量偏離設(shè)計(jì)值。
One is the floor area is small. The width of the grate cannot make fuel per unit time into the grate, under the design parameters required in coal consumption, namely the boiler heat and high temperature smoke gas output requirements and design the enough, the result must be pressure, evaporation deviates from the value of the design.
二是往復(fù)平推爐排煤層厚度受限制。由于爐排較窄，相應(yīng)減小了煤耗，為了增加燃煤量，只有增加爐排上煤層厚度。由于是往復(fù)平推爐排，煤在爐排上無自然下落趨勢(shì)，只靠爐排片翹起向后推動(dòng)使煤在爐排上燃燒，然而煤層過厚，爐排片對(duì)煤，特別是超過規(guī)定厚度煤層推動(dòng)作用減弱，當(dāng)活動(dòng)爐排抽回時(shí)，又將剛向后推動(dòng)的煤帶回，使煤層向后運(yùn)動(dòng)產(chǎn)生停滯，以至煤及渣混合起鼓，不能及時(shí)將煤渣推入渣坑，嚴(yán)重時(shí)，可使燃煤及渣頂著后拱，破壞了層燃狀態(tài)，影響正常運(yùn)行。
The second is the thickness of the coal seam in the back and forth. Because the grate is relatively narrow, the coal consumption is reduced accordingly, to increase the amount of coal burning, only the coal seam thickness is added to the furnace. As reciprocating horizontal pushing grate, no natural falling trend of coal on the fire grate, powered by backward link cock only make coal burning in the grate, too thick coal seam, however, grate piece of coal, especially in excess of the prescribed role in promoting the thickness of coal seam is abate, when activities grate withdraw, just pushing coal back to back, it will make the coal seam backward movement stagnation, and slag and coal mixing drum, can't timely pushing coal slag into the pit, serious when, can make the coal and slag with arch, destroyed the layer combustion state, affect the normal operation.
三是爐排長(zhǎng)度不夠，縮短了燃煤在爐排上停留時(shí)間，特別是在增加煤層厚度時(shí)，爐排行程、爐排推動(dòng)頻率不變，致使煤不能充分燃燒，爐渣中含有大量可燃質(zhì)，增加了機(jī)械不完全燃燒熱損失。
Is a grate length is insufficient, shorten the retention time on coal burning in the grate, especially in the increase of coal seam thickness, grate stroke, grate drive frequency constant, which is not fully burning coal, slag containing large amounts of combustible qualitative, increased the mechanical incomplete combustion heat loss.
四是前后拱結(jié)構(gòu)不合理，燃燒達(dá)不到最佳狀態(tài)。前后拱配合不當(dāng)，燃盡區(qū)的高溫?zé)煔?，被引?dǎo)作用不明顯，拱不能保證爐膛有較高溫度，主燃區(qū)得不到應(yīng)有的熱量，煤燃不透;同時(shí)后拱覆蓋爐排面積較大，拱型結(jié)構(gòu)使高溫?zé)煔饬鲃?dòng)受阻，削弱了擾動(dòng)，縮短煙氣流程，同時(shí)造成喉部高溫?zé)煔庵形慈嘉锱c空氣混合不良，增加了化學(xué)燃燒損失。
Fourth, the arch structure is irrational and the combustion is not the best. Arch mismatch, before and after the high temperature flue gas of burning area, be directed effect is not obvious, arch cannot ensure furnace with high temperature, primary zone without proper heat, coal combustion opaque; At the same time after the arch cover fire grate area is larger, the arch structure makes high temperature flue gas flow is blocked, weaken the disturbance, shorten the flue gas flow, at the same time cause the throat not combustion in high temperature flue gas and air mixture, increased chemical combustion loss.
