ASTM D6700-01(2013)
废轮胎产生的燃料的使用的标准实施规程

Standard Practice for Use of Scrap Tire-Derived Fuel

被代替

标准号

ASTM D6700-01(2013)

发布

2001年

发布单位

美国材料与试验协会

替代标准

ASTM D6700-19

当前最新

ASTM D6700-19

 

 

引用标准

ASTM D2013 ASTM D2361 ASTM D2795 ASTM D3172 ASTM D3173 ASTM D3174 ASTM D3175 ASTM D3176 ASTM D3177 ASTM D3178 ASTM D3179 ASTM D3682 ASTM D4239 ASTM D4326 ASTM D4749 ASTM D5468 ASTM D5865 ASTM E873

适用范围

4.1 When considering the specification of fuels for a boiler, issues to evaluate are the fuel's combustion characteristics, handling and feeding logistics, environmental concerns, and ash residue considerations. A thorough understanding of these issues is required to engineer the combustion unit for power and steam generation; however, TDF has demonstrated compatible characteristics allowing it to serve as a supplemental fuel in existing combustion units based on cumulative experience in many facilities originally designed for traditional fossil fuels, or wood wastes, or both. When used as a supplemental energy resource in existing units, TDF usage is generally limited to blend ratios in the 10-30 % range based on energy input. This limit is due to its high heat release rate and low moisture content, which differ significantly from other solid fuels, such as wood, refuse derived fuel, coal and petroleum coke.

4.2 New combustion units dedicated to the use of TDF (or whole tires) as the sole fuel source are rare. The generation and availability of scrap tires is ultimately determined by market conditions for new tires and the depletion rate of scrap tire inventories (stockpiles). Scrap tires account for approximately 1 % of the municipal solid waste stream. Based on a national scrap tire generation rate, there are roughly 2.5 to 3 million tons (annually available for all uses to include fuel, crumb rubber, engineering projects, and so forth). Some dedicated combustion units have been built, however, competition for the scrap tires as other existing sources begin to use TDF will determine the ultimate viability of these facilities. Although most regions can supply TDF demand as a supplemental fuel, a dedicated boiler in the range of 500,000 lb/h (227,000 kg/h) steaming capacity would require over 668199;000 scrap tires/day to meet its fuel demand. Such demand may strain a region's ability to supply and put the fuel supply at risk. Some design projects have incorporated TDF as a supplemental fuel with wood, coal, coke, sludge, or some combination of multiple fuels where demand is consistent with supply availability.

4.3 It is important to understand what objectives may lead to TDF's choice as a supplemental fuel in existing power units. Several model objectives may be as follows:

4.3.1 To increase boiler efficiency in a co-fired boiler using wood, sludge, and coal;

4.3.2 To procure a competitively priced fuel;

4.3.3 To supplement limited supplies of an existing fuel;

4.3.4 To use a high quality fuel;

4.3.5 To achieve environmental benefits by using a fuel with a relatively low sulfur content in comparison to certain coals or petroleum coke, and;

4.3.6 To provide a public and social benefit that solves a regional solid waste problem.

4.4 Boilers generally are engineered around fuels that will be available through the amortized life of the power unit. Boiler design discussions here are limited as TDF standard size specifications have been developed to assure TDF's performance in existing systems. TDF is mined from the solid waste stream as a whole tire, then engineered via processing ......

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