公开(公告)号：US4589357A

公开(公告)日：1986-05-20

申请号：US768306

申请日：1985-08-22

申请人： James F. L. Lincoln ,  Manfred K. Buder ,  Craig A. Brown ,  Gregory P. Golike ,  Robert M. Spurrell

发明人： James F. L. Lincoln ,  Manfred K. Buder ,  Craig A. Brown ,  Gregory P. Golike ,  Robert M. Spurrell

IPC分类号： C10L5/44 ,  F23G5/02 ,  F23K1/00 ,  F23D1/00

CPC分类号： F23G5/02 ,  C10L5/44 ,  F23K1/00 ,  F23G2201/10 ,  F23G2201/602 ,  F23G2201/80 ,  F23G2209/261 ,  Y02E50/10 ,  Y02E50/30

摘要： The present invention relates to the preparation and burning of biomass-derived fuels such as wood waste or peat. Wood waste or "hog fuel" from the forest industries is of particular interest. Normally the entire stream of this material must be finely ground if it is to be successfully burned in an air suspension burner without any fossil fuel support. It has now been discovered that a bimodally sized fuel can be used. Only about 10-20% of the total heat energy is provided from a portion ground to a size less than about 100 .mu.m. This serves as an ignition component for a principal fuel which may be of much larger size. The usual hog fuel pile contains both bark and wood. Of these two materials, bark is much more friable and easily ground to fine particle size than wood. A major reduction in grinding energy is achieved by selecting the more friable material to be ground to fine size as the ignition fuel. The more resistant material is used as the principal fuel. When using a bimodal system, best results are obtained when the amount of ignition fuel sent to the burner is maintained constant. Load swings are accommodated by varying only the principal fuel component.

摘要翻译： 本发明涉及生物质衍生的燃料如木材废料或泥炭的制备和燃烧。 森林工业的木材废料或“猪肉燃料”特别令人感兴趣。 通常，如果要在没有任何化石燃料支持的空气悬架燃烧器中成功燃烧，则该材料的整个流必须精细磨碎。 现在已经发现可以使用双峰尺寸的燃料。 总热能的大约10-20％从地面到小于约100μm的尺寸提供。 这用作可能具有更大尺寸的主要燃料的点火部件。 通常的猪肉燃料堆包含树皮和木材。 在这两种材料中，树皮比木材更易碎，容易磨碎成细粒度。 通过选择要被研磨的较脆碎的材料作为点燃燃料，可以大大降低磨削能量。 较为耐用的材料用作主要燃料。 当使用双峰系统时，当燃烧器发出的点火燃料的量保持恒定时，可获得最佳效果。 仅通过改变主要燃料组分来容纳负载摆动。

公开(公告)号：US4589356A

公开(公告)日：1986-05-20

申请号：US768269

申请日：1985-08-22

申请人： Terry N. Adams ,  Robert M. Spurrell ,  Grant G. Karsner ,  Gregory P. Golike ,  James F. L. Lincoln

发明人： Terry N. Adams ,  Robert M. Spurrell ,  Grant G. Karsner ,  Gregory P. Golike ,  James F. L. Lincoln

IPC分类号： F23G5/02 ,  F23K1/00 ,  F23D1/00

CPC分类号： F23K1/00 ,  F23G5/02

摘要： The present invention relates to the recovery of heat values from biomass materials such as wood waste or peat. Wood waste or "hog fuel" from the forest industries is of particular interest. It has been discovered that this material can be burned with no fossil fuel support in an air suspension-type burner without the need to finely pulverize the full fuel stream. One portion of the biomass fuel stream is ground so that it is less than 100 .mu.m in diameter. This fine portion serves as an ignition component and should comprise about 20% of the total heating value of the fuel, using a conventional air suspension burner, or 10% of the total heating value using a staged burner, when the burners are operated at full load. The balance of the fuel can be of much larger particle size. This can be up to about 10 mm or even greater in maximum dimension if used with a grate equipped boiler. If the boiler lacks a grate, the principle fuel component should not exceed about 1 mm in thickness and 4 mm in any other dimension if carryover is to be avoided. A key aspect of the invention is the discovery that the total amount of ignition fuel component should be maintained constant regardless of burner load. The principal fuel component is modulated to accommodate load swings. Thus, at lower loads a higher percentage of the total heat energy is derived from the ignition fuel component.

摘要翻译： 本发明涉及从木材废料或泥煤等生物质材料回收热量。 森林工业的木材废料或“猪肉燃料”特别令人感兴趣。 已经发现，这种材料可以在空气悬浮式燃烧器中没有化石燃料支持物燃烧，而不需要对全部燃料流进行细粉碎。 一部分生物质燃料流被研磨成直径小于100微米。 当燃烧器完全运行时，该细小部分用作点火组件，并且应使用常规空气悬架燃烧器占燃料总热值的约20％，或使用分段式燃烧器的总热值的10％ 加载。 燃料的平衡可以大得多的粒径。 如果与装有炉排的锅炉一起使用，最大尺寸可以达到约10mm或甚至更大。 如果锅炉缺乏炉排，如果要避免残留物，则主要燃料组分的厚度不应超过约1mm，任何其他尺寸为4mm。 本发明的一个关键方面是发现，不管燃烧器负载如何，点燃燃料组分的总量应该保持恒定。 主要的燃料成分被调制以适应负载摆动。 因此，在较低的负载下，总的热能的百分比高于点燃燃料组分。