850度2S的计算
一、锅炉热负荷的计算
1、（从汽水吸收的热量来计算）
公式：TLB = Qsteam/ ( 3600 x 1000 ) * (Factor_water + deltaHv + Factor_steam) + Qhpsteam/ ( 3600 x 1000 ) * ( Factor_watar + deltaHv )
Factor_water = (Tsat-Tfeedwater)*Cpw
Factor_steam = (Tsteam-Tsat)*Cps
吃大蒜的坏处
with
deltaHv = 1661 kJ/kg (specific heat capacity for evaporation of water at47 bara)//在4.7MPa压力下水的蒸发热容
Tsat = 260.2癈 (saturation temperature of water at 47 bara)// 在4.7MPa压力下水的饱和温度
中班体育
Cpw = 4,25 kJ/kg癈 (specific isobaric heat capacity water at 47 bara and Tfw 130 癈)// 在4.7MPa压力、130度时下水的热容
Cps = 2,638 kJ/kg癈 (specific isobaric heat capacity steam at 41 bara) 在4.1MPa压力下水的热容
2、锅炉热损失（排烟损失）
SHFG = FlueGasFlow_boileroutlet * CpFG * RhoFG * (Tst - 25) / (3600*1000)
FlueGasFlow_boileroutlet = 1,01 * FlueGasFlow_aftercombustion (Nm3/h)锅炉烟气流量
with
CpFG = 1,13 kJ/kg癈 (specific isobaric heat capacity flue gas)烟气热容
RhoFG = 1,24 kg/Nm3 (nominal point density flue gas)烟气密度
T st 排烟温度
3、空气预热吸收的热量（一次风和炉墙冷却风）
SHCA = CpCA * RhoCA / (3600*1000) * ( Qpa * (Tpa-25) + Qsa * (Tsa-25) )
SUM(Qair*deltaTair) = Qprim * deltaTprim - Qfw deltaTfw
prim = primary air
fw = furnace wall cooling air
with
CpCA = 1,03 kJ/kg癈 (specific isobaric heat capacity combustion air)
RhoCA = 1,281 kg/Nm3 (standard density combustion air)华裕家园>烂熳
Tsa = 癈 ( design temperature from top of boiler )
4、辅助燃烧器
TLA = Qfuel * Rho * LHVfuel / 3600
环绕的意思with
Qfuel = flow of fuel to burners
按图索骥的近义词Rho = 0,85 kg/l (density)
LHVfuel = 42.6 MJ/kg (lower heating value of fuel)
5、TLtotal = ( TLB + SHFG ) * k - SHCA
with
k = 1,17 (constant factor for other loss)
6 TL = TLtotal – TLA
7、计算4分钟热负荷平均值TLtotal_4min
二、计算温度
1、计算H1和H2之间的温度偏差
deltaT = A + B / TLtotal_4min
T_H1 = T_H2 + deltaT
2、Qreal = Qflue * (273 + (T_H1 + T_H2) / 2) / 273 / 3600
with
Qflue = flue gas flow in Nm3/h
T_H1 = temperature on level H1 (begin boiler pass / end of post-combustion zone)
T_H2 = temperature on level H2 (top empty pass)
3、2秒内烟气到达的高度计算
H_2c = H1 + ( 2 - V/Qreal ) * Qreal / S
with
H1 = level H1 (begin boiler first empty pass)粉饼怎么用才正确
V = volume between level H0 (condary air injection) and level H1
S = ction of boiler first empty pass
4、内插法计算
T_2c = T_H1 + (T_H2 - T_H1)/(H2 - H1) * (H_2c - H1)
三、参数定义
参数： H1 ：燃尽段高度
H2：第一烟道顶部高度
H0：二次风注入口高度
H2s：烟气产生点在货币战争读后感2S内到达的高度
