[en] It is an open question whether modern low-NOx burners can fulfil the most recent requirements posed by the Norwegian National State Pollution Control Authority (SFT). Old, conventional burners may fail to meet the new requirements, even after major modifications. Even new low-NOx burners may meet them only if the nitrogen content of the fuel oil is sufficiently small. Full compliance with the requirements will be achieved by installation of a cleaning system for NOx, but this entails investment an operation costs. An alternative may be changing to domestic heating oil; this will cause substantially less emission of NOx but increase fuel costs. The article discusses some issues that affect the NOx emission and some possibilities of modifying existing plants

[en] Because of the high process temperature which is required for some processes like glass melting and the high temperature to which the combustion air is preheated, NOx emission are extremely high. Even at these high temperatures, NOx emissions could be reduced drastically by using advanced combustion techniques such as staged combustion or flame-less oxidation, as experimental work has shown. In the case of oxy-fuel combustion, the NOx emission are also very high if conventional burners are used. The new combustion techniques achieve similar NOx reductions. (author)

[en] The technological development of the gas industry in Colombia, aiming at efficient and safe use of the natural gas, requires the assimilation and adaptation of new generation, technologies for this purpose in this article results are presented on the design, construction and characterization of a prototype of a burner of regenerative radiant robe with a thermal power of 9,94 kW and a factor of air 1,05. This system takes advantage of the high exit temperature of the combustion smokes, after they go trough a metallic robe where they transfer the heat by radiation, to heat a ceramic channel that has the capacity to absorbing a part of the heat of the smokes and then transferring them to a current of cold air. The benefits of air heating are a saving in fuel, compared with other processes that don't incorporate the recovery of heat from the combustion gases. In this work it was possible to probe a methodology for the design of this type of burners and to reach maximum temperatures of heating of combustion air of 377,9 centigrade degrees, using a material available in the national market, whose regenerative properties should be studied in depth

[en] To determine the appropriate power level and conversion ratio for an economic burning of TRU, various design trade-off studies are necessary and for this purpose the core power levels of 600, 1,200 and 1,800 MWe have been investigated. The reactor power should be maintained in pursuit of size of economy. Hence, this study focused to core designs which have cores whose powers range from 300 MWe to 1,800 MWe and compare the core performance parameters and reactivity coefficients of four cores which have power levels of 300, 600, 1,200 and 1,800 MWe

[en] Core design study has been performed to develop the optimum core designs. The role of the advanced burner reactor is to transmute the TRU elements as much as it can. But to have a high TRU consumption rate, it is desirable to have a low conversion ratio. However, a low conversion ratio requires a high TRU enrichment but currently there is limited irradiation experience with plutonium-based fast reactor fuel. The TRU enrichment can not be higher than 30 w/o, which is the current irradiation experience. Hence, this study focused to a core design which has a maximum TRU enrichment of 30 w/o and a power level of 600 MWe. After finding the core having the maximum TRU enrichment, the core height was increased to find the relation between the core performance parameter and the core height

[en] Wall-flow catalytic filters were prepared by impregnation of porous cordierite honeycombs with Cs-Fe-V catalysts. The catalytic filters were tested at the exhaust of a gas-oil burner. Results reported indicate that the trapped soot begin to burn at a temperature around 300-320^oC allowing the self-regeneration of the filter. Performances were found to remain stable also under high SO₂ concentrations, making these catalytic filters suitable for soot removal in off-road diesel engines and domestic apparatus

[en] A new style of oil burner has been developed for use on exploration platforms offshore. The design improves oil combustion through enhanced air induction, producing stable flames in the clean burn region which do not generate smoke and oil fallout. Successful tests have led to it now being ready for commercial exploitation. (UK)

[en] It is well-known that a strand burner is an apparatus that provides burning rate measurements of a solid propellant at an elevated pressure in order to obtain the burning characteristics of a propellant. This paper describes the facilities developed by author that was used in his studies. The burning rate characteristics of solid propellant have be evaluated over five different chamber pressures ranging from 1 atm to 31 atm using a strand burner. The strand burner has a mounting stand that allows the propellant strand to be mounted vertically. The strand was ignited electrically using hot wire, and the burning time was recorded by electronic timer. Wire technique was used to measure the burning rate. Preliminary results from these techniques are presented. This study shows that the strand burner can be used on propellant strands to obtain accurate low pressure burning rate data

[en] This report describes the work performed to develop and demonstrate the VISTA combustor. The development effort was planned for three phases. Laboratory testing at a 1.5 and 6 MMBtu/hr scale was performed at thermo Power Corporation during the first phase. Also during the first phase, analytic modeling was performed to guide the design modifications evaluated in the experimental testing. Toward the end of the first phase, John Zink Company entered the program to participate in the design, evaluation, testing, and demonstration of a 30 MMBtu/hr combustor. The results of the second phase testing were to be used in the demonstration of the 30 MMBtu/hr combustor in a Koch Industries boiler. The program proceeded into the second phase. Two models of the VISTA combustor were tested. Measurements of the first stage NOx production were in the range anticipated to achieve the program goals, based on analytical modeling results. While testing the VISTA combustor at the John Zink facility, John Zink elected to discontinue the development of the VISTA combustor in favor of an alternative in-house concept. As a result, this program was terminated

[en] Tests of co-combustion of wood chips and coal were carried out. Adding coal to high-moisture wood chips favours the combustion of the latter and enables the utilization of fine fractions of coal. To avoid the liquefying of ash and the clinkering of the grate the coal content of fuel and primary air delivery should be kept low. (author)