低位热值

城市生活垃圾中代表可燃成分的有机物含量已达60%以上，低位热值在4500kJ／kg左右。

The organic matter represented for combustible substance in MSW was above 60 % , and the low thermal value approached 4500kJ / kg .

垃圾中可燃物比例较高，水分含量较低，有利于焚烧和热解，低位热值（Q低）平均值为（5590.8±1252.3）kJ/kg，但低位热值随季节变化较大。

The water content was relative low in MSW and this is good for incineration . The low heat value of annual mean was about 5590.8 ± 1252.3 kJ / kg in MSW , but the value changed greatly with the season .

采用此法测定煤的恒容低位热值使用设备少、方法简便、误差在允许范围之内、分析时间可缩短至30min之内，及时为生产操作提供较可靠的数据，可用于指导生产。

With this method the equipment used is less , the operation is simple , the error is within the allowable range , and the analytical time can be shortened to less than 30 min , thus providing reliable data in time for operation in production , guiding production .

利用脉冲快热中子法检测煤的低位热值

Measurement of Low Calorific Value of Coal by Pulse Fast-thermal Neutron Analysis

垃圾湿基低位热值月份间差别不是很显著，年间变化增长速度较快；

Morthly change of waste low caloric value ( wet base ) was not obvious , caloric value increased faster yearly .

焚烧技术是处理城市生活垃圾的一种有效方式，限制其应用的条件之一是城市生活垃圾低位热值。

Incineration is one of the accepted and effective technologies for the treatment of Municipal Solid Waste ( MSW ) , one of the restrictive conditions for its application is the heat value of MSW .

采用标准分析法，对与生活垃圾焚烧特性有关的几个物理参数进行了测定，得到了延安市区生活垃圾的组成、容重、含水率、可燃分含量以及湿基低位热值的基础数据和动态特征。

Several physical parameters related to MSW incineration characteristics were determined by adopting standard analysis method . Basic data and dynamic traits of composition proportion , bulk-density , moisture ratio , inflammable matter content and low-calorific value were acquired .

热解气低位热值均随热解温度的升高逐步下降。（2）分析了热解条件对煤快速热解焦理化结构及最终气化特性的影响。

Low heating values of all the pyrolysis gas decreased with the increasing temperature . ( 2 ) Effects of pyrolysis conditions on morphologic and instinct chemical structures and further on gasification characteristics of the char derived from coal pyrolysis were studied .

结果表明：对于所给定焚烧项目的垃圾来讲，其垃圾的低位热值近似为4200kJ/kg，需要进行混烧，其中煤的比例应小于10～20%；

The results indicate that for the waste studied in the incineration object , co-combustion technology is necessary since the heat value of waste is 4200 kJ / kg , and the coal ratio in mixed fuel should be less than 10 % ~ 20 % .

当生活垃圾湿基低位热值小于3500kJ/kg时，加20%煤燃料，焚烧烟气温度可达900℃，烟气排放符合环保标准。

When lower level heating value of wet MSW was lower than 3 500 kJ / kg , if auxiliary 20 % coal added , the combustion temperature increased up to 900 ℃ and the exhaust of waste gas would come up to the environment standard .