04-渗滤液回喷对烟气成分的影响

上海泰欣环保设备成套有限公司
WTE PLANT
Leachate injection_Influence on flue gas cleaning for point A 渗滤液回喷对烟气净化的影响(焚烧图渗滤液回喷对烟气净化的影响焚烧图燃烧点 A)
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DESCRIPTION OF MODIFICATION Leachate-Injection influence on FGC.doc
02.01.2008 DATE
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Felix AUTHOR CHECK APPROVED

Following conditions at reactor inlet were used as nominal (MCR) and max. data for process calculations and design: 以下烟气反应塔入口烟气 (额定的及最大的) 的条件将做为过程计算设计的基础:
(inlet reactor)
(inlet reactor)
Temperature Flow CO2 H2O O2 Dust HCl HF SO2 CO NOx TOC Hg total Cd total Pb total PCDD/F
°C
3
Nm /h % % % mg/Nm3 dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm3 dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm3 dry; 11% O2 mg/Nm dry; 11% O2 ng TEQ/Nm3 dry; 11% O2
3 3 3 3 3 3 3
Table 1. MCR and max. design conditions 表 1. 额定及最大的设计条件
To check the influence of leachate injection, point A of the combustion diagram is considered. This point does not correspond 100 % to the point MCR. Major difference is the slightly lower flue gas flow (less than 1 % difference). As point A corresponds to the real nominal operation point, it is justified to explore the influence of leachate injection in this point, and not in the MCR. The conditions in this point A before and after leachate injection are the following: 本次计算以燃烧点 A 为基础检测渗滤液回喷的影响。点 A （状态）并不和额定值条件（MCR）完全相同,最主要的区别是烟气流量稍小（不到 1%）。由于点 A 相比 MCR 所对应的是真正的额定燃烧点，依据此点来计算是最真实可靠的。（经过计算）点 A 状态下渗滤液回喷前/后的状态（烟气反应塔入口处烟气状态）如下表所示：
Leachate-Injection influence on FGC
曼格林
Opacity
Ringelmann
190 94.300 7,6 23 7,4 2.280 1.050 5 300 380 5
220 105.049 30,0 10.000 1.500 10 500 380 1 1 5
Page 2/4
制限放排制限放排制限放排制限放排
<= 1 30 50 2 260 100 380 20 0,1 0,1 1,6 0,1
值大最值大最值大最值大最
值定额值定额值定额值定额
Component
Unit
Nominal
Maximal
Emission limit
位单位单位单位单
英恶二铅镉汞碳机有总物化氧氮碳化氧一硫化氧二氢化氟氢化氯尘粉气氧水碳化氧二量流度温度明透不分成分成分成分成

Component
Unit
Pt A no leachate (inlet reactor)
Pt A with leachate (inlet reactor)
Emission limit
Temperature Flow CO2 H2O O2 Dust HCl HF SO2 CO NOx TOC Hg total Cd total Pb total PCDD/F
Table 2. Point A combustion diagram with and without leachate injection 表 2. 焚烧图表点 A 有/无渗滤液回喷时的烟气成分
Leachate injection will raise the flue gas flow, but only by 0,12 %, which can be considered insignificant and thus can be ignored. As a consequence, flue gas residence time in reactor and bag filter remains unchanged. This means that with unchanged pollutant concentrations in the flue gas, no stoichiometry increase is necessary, and so no increased lime consumption is expected. As the flue gas velocity over the bags of the filter remains also unaffected, in combination with unchanged dust load, no increased wear of the bags is expected. 渗滤液回喷只会稍许增加烟气流量（仅仅 0.12%），其影响几乎可以忽略。因此，烟气在烟气反应塔及布袋中的停留时间不会增加，烟气中的污染物浓度不会改变，没有化学计量增加，也就无需增加石灰浆的消耗。由于烟气的流速几乎不受影响，粉尘负荷不会增加，不会加重布袋的磨损程度。 As the introduction of leachate does not change the chlorine (Cl), sulfur (S) or fluor (F) content of the waste, the amount of HCl, SO2 and HF to the semi-wet reactor remains unchanged too, and by consequence also the lime consumption. The same conclusion is valid for activated carbon consumption. This is illustrated in table 3.
Leachate-Injection influence on FGC
英恶二铅镉汞碳机有总物化氧氮碳化氧一硫化氧二氢化氟氢化氯尘粉气氧水碳化氧二量流度温度明透不
Opacity
Ringelmann °C Nm /h % % % mg/Nm3 dry; 11% O2 mg/Nm3 dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm3 dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 mg/Nm dry; 11% O2 ng TEQ/Nm3 dry; 11% O2
3 3 3 3 3 3 3 3
190 93.367 7,3 19 8,6 2.370 1.050 5 300 380 5
190 93.476 7,3 21,8 8,1 2.370 1.050 5 300 380 5
Page 3/4
制限放排制限放排制限放排制限放排
<= 1 30 50 2 260 100 380 20 0,1 0,1 1,6 0,1
喷回液滤渗有喷回液滤渗有喷回液滤渗有喷回液滤渗有
喷回液滤渗无喷回液滤渗无喷回液滤渗无喷回液滤渗无
元单
分成

（经过计算和研究）渗滤液加入（炉膛）后不会改变垃圾中的氯、硫、氟的含量，进入烟气反应塔的烟气中，氯化氢、二氧化硫及氟化氢的含量也相应不会改变。（用于中和烟气中有害物质的）石灰浆及活性炭也不会增加，如表 3 所列。
PAC
Table 3. Influence leachate injection on lime and PAC consumption Point A 表 3. 焚烧图表点 A 有/无渗滤液回喷时的石灰及活性炭的消耗量 Major difference in flue gas composition is the increased water content. This results in an increased dewpoint, but also here the increment is very small: for point A dewpoint inlet reactor increases only 1 °C, so no problems are expected. As the temperature at the reactor exit is designed to be 150 °C, and with a good working bag filter and residue transport system (trace-heating!), no residue handling problems are expected due to the increased flue gas / residue moisture content. In addition, water content in the flue gas for point A with injection of leachate is still smaller than the water content in point MCR and in the max point as specified in the contract (see table 1), which means the increment in moisture due to leachate injection is perfectly within the operational limits of the flue gas cleaning plant. （渗滤液回喷）最主要的影响是增加了烟气中的水含量，也会增加露点，当然增量也很小：在焚烧点 A，烟气反应塔入口的露点将只会升高 1 摄氏度，所以不会有任何问题。由于烟气反应塔的出口烟气温度设计为 150 摄氏度，加上良好的布袋及灰渣输送（伴热系统），灰渣的处理不会由于烟气/灰渣的湿度的增加产生问题。此外，增加渗滤液回喷后点 A 状态下的烟气含水量相比理论额定状态 MCR 以及最大值状态仍然较低（参见表 1），由此可见使用渗滤液回喷后烟气含水量的增加完全在烟气净化处理的处理能力范围之内。
Conclusion 结论 When repeating the same exercise for every point of the combustion diagram, it can be seen that the same observations are valid as for point A. The observed differences are always within the design limits of the flue gas cleaning plant. For this, it can be concluded that leachate injection will not have any significant influence on the performance of the flue gas cleaning installation. 通过对焚烧图表其他焚烧点状态的计算，可观察到其结果和点 A 一样。所有的影响都在烟气净化系统的设计能力范围之内。所以我们可以得出明确的结论：渗滤液回喷方法的使用不会对烟气净化系统的性能产生任何实质影响。
Leachate-Injection influence on FGC
）
Lime (industrial, 80%) 80%
8,1
8,1
量耗消
kg/h kg/h
Page 4/4
喷回液滤渗有点
喷回液滤渗无点
Pt A no leachate A ~ 180
Pt A leachate A ~ 180
炭性活，的业工（灰石