Long Term Operation and Maintenance of a Digester at the Brendle Farms Poultry Operation

2004 ◽  
Author(s):  
Wayne M. Bogovich ◽  
Michael W. Brendle
Author(s):  
Paul J. Stoller ◽  
Anthony LoRe ◽  
William Crellin ◽  
Robert Hauser

This paper presents the preliminary results of one of the key financial liability issues raised by the operating companies during the competitive procurement process for the long-term operation and maintenance of the 24-year old Pinellas County 3,000 tpd waste-to-energy facility.


Author(s):  
Б.С. Антропов ◽  
В.В. Гумённый ◽  
А.А. Рудаков ◽  
В.А. Генералов

Проанализирована работоспособность деталей механизмов газораспределения (МГР) на основе обобщения многолетней эксплуатации двигателей ЯМЗ-236, 238 и их модификаций на автотракторной технике. Установлено, что возникающие неисправности и дефекты в МГР связаны в основном с нарушением эксплуатации и технического обслуживания указанных двигателей. При соблюдении норм эксплуатации и технического обслуживания согласно требованиям руководства по эксплуатации двигателей завода-изготовителя (недопущение «перекрутки» двигателя по частоте вращения коленчатого вала, применение качественных моторных масел, своевременный контроль и регулировка тепловых зазоров) детали МГР обеспечивают работоспособность двигателей до капитального ремонта. Указанный вид ремонта связан с ремонтом или заменой базовых деталей двигателя (блока цилиндров или коленчатого вала). The working capacity of details of mechanisms of valve timing gear (VTG) on the basis of generalization of long-term operation of YaMZ-236, 238 engines and their modifications on the motor-and-tractor equipment is analyzed. It was established that the resulting malfunctions and defects in VTG are mainly associated with a breakdown of service of the operation and maintenance of these engines. If the operating and maintenance standards are met in accordance with the requirements of the maker's engine operations manual (prevention of engine "twisting" by crankshaft speed, use of high-quality motor oils, timely monitoring and adjustment of expansion gaps), the VTG parts ensure the engines working capacity before overhaul. This type of repair is associated with the repair or replacement of basic engine parts (cylinder block or crankshaft).


2017 ◽  
Vol 1 (21) ◽  
pp. 65-73
Author(s):  
Monika Gwoździk

The paper presents results of studies on the crystallite sizes of oxide layer formed during a long-term operation on 10CrMo9-10 steel at an elevated temperature (T = 545° C, t = 200,000 h). This value was determined by a method based on analysis of the diffraction line profile, according to a Scherrer formula. The oxide layer was studied on a surface and a cross-section at the outer and inner site on the pipe outlet, at the fire and counter-fire wall of the tube. X-ray studies were carried out on the surface of a tube, then the layer’s surface was polished and the diffraction measurements repeated to reveal differences in the originated oxides layer.


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