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国外汽爆机

发布时间:2014-11-18 10:19:06 浏览次数:2648


      2004, the steam explosion pilot plant has primarily provided technical support toward the production of research material necessary for two very distinct and different research efforts.


      In the one case, the smallest of our three steam explosion reaction vessels provided material involving the co-steam explosion of wood and thermoplastic polymers. This has been on-going work over several years and, in fact, was referenced in last year’s “Creative Achievements.” This year the work culminated in the completion of two graduate degrees. Scott Renneckar successfully defended his dissertation titled “Modification of Wood Fiber with Thermoplastics by Reactive Steam-Explosion Processing” and Richard Johnson successfully defended his master’s thesis titled “Mechanical and Sorption Characteristics of Cellulose Fiber-Reinforced Thermoplastic Composites.” Both students had utilized the small stirred batch steam explosion reactor extensively.


In the second case Dr. Foster Agblevor continued his work to further develop the empirical knowledge base for the optimization of steam explosion as a treatment step for the utilization of cotton gin waste material as a source of fuel ethanol. The steam explosion process provides essential chemical modification to the waste material and renders it into a more homogeneous mixture of particle sizes. The homogeneity facilitates each subsequent process step in the production of ethanol. Dr. Agblevor is a faculty member in the Department of Biological Systems Engineering, and is making a significant investigation into the utilization of two other agricultural products as a source for enzymatic conversion of cellulose via steam explosion.


The steam explosion laboratory is equipped with three different process vessels and several pieces of ancillary equipment. The process vessels, in size order from large to small, begin with our Stake Technologies Ltd. Continuous steam explosion reactor with co-axial feeder assembly. This is a stainless steel pressure vessel with agitation and measures 2 ft. diameter x 24 ft. long (70 ft3 volume).


Material can be processed at pressures up to and including 450 psig working steam pressure and 500oF. The coaxial, mechanical feeder attached has a 6 in. diameter bore and a capacity of 1,750 lbs/hr (oven dry basis) ?” pulpwood chips.


We also have the capability to work with properly sized agricultural residues of any type, properly sized paper products for re-pulping, food waste blended with lignocellulose waste materials, thin film plastic waste blended with ligno-cellulose materials, and many other materials


including reaction catalysts.


The next size smaller piece of steam explosion equipment is our 0.9 ft.3 (20 liter) volume, stainless steel, non-stirred, batch steam explosion vessel capable of 450 psig and 500 oF.


The mass capacity depends upon the bulk density of the material being tested. Typically for green wood chips it would be a maximum of 5 lbs., dry basis.


The smallest steam explosion vessel is a stirred batch reactor. It has a volume of 0.13 ft.3, is made of extra-heavy wall stainless steel with a working pressure capability in excess of 1,000 psig, and is configured in a manner that permits in situ addition of catalysts and alternate reaction


atmospheres.


For information about the Steam Explosion Pilot Plant, tours, or research opportunities, please contact Bob Wright at (540) 231-8838 or by email at [email protected]


Richard Johnson adjacent to the 20 liter batchs steam explosion reaction vessel. This equipment was used to provide some of the material required for Richard’s graduate research project.


Richard Johnson and Scott Renneckar at the steam explosion pilot plant.


Steam Explosion Pilot Plant Pilot Plant Manager: Bob Wright


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