Research On The Operation Of Bag Filters For Dust And Gas Cleaning In Cement Production (On The Example Of Factories In The Ferghana Region Of The Republic Of Uzbekistan)

Cement production is one of the most common man-made air pollutants. In this regard, the need for dust collection in this process is obvious. The article presents an analysis of the used designs of dust collection devices in the cement production of the Fergana region of the Republic of Uzbekistan. Methods of tissue filter regeneration are analyzed. The results of experimental studies on the state of synthetic fabric bag filters installed on air purifiers from dust and gas flows are presented. The choice of the standard size, design and the required number of fabric bag filters was made. For technical and economic reasons, there is a method and mode of filter regeneration that does not cause severe wear of the fabric, due to which the duration of filter operation without expensive stops for current repairs is significantly increased.

Comparison of intake and exhaust throttling for diesel particulate filter active regeneration of non-road diesel engine with mechanical fuel injection pump

Diesel particulate filter regeneration using intake and exhaust throttling is technically simple and economically efficient compared to other methods. The purpose of this study is to investigate not only the reasons for the increase in exhaust temperature during intake or exhaust throttling but also their feasibility as a diesel particulate filter regeneration technology. In this study, a non-road diesel engine having a mechanical fuel injection pump was used for experiments. The changes in exhaust temperatures were measured during intake and exhaust throttling for the no-load maximum revolutions per minute engine condition. The experimental results exhibited that both intake and exhaust throttling reduced the intake air mass flow rate and increased piston pumping, which then increased fuel consumption. These effects were the primary reasons for increasing the temperature of exhaust gases. In particular, intake throttling was more effective than exhaust throttling in terms of reducing the intake air mass flow rate. However, exhaust throttling caused larger pumping losses, resulting in higher fuel consumption. Furthermore, in case of exhaust throttling, engine combustion was possible even at high equivalence ratios because of the larger amounts of residual gases in the combustion chamber. In summary, exhaust throttling is more effective for regenerating a diesel particulate filter at a high temperature than intake throttling. In addition, this study verified the feasibility of diesel particulate filter regeneration using exhaust throttling through analyses of diesel particulate filter regeneration efficiency, fuel consumption, and exhaust concentration when regenerating the diesel particulate filter by increasing the exhaust temperature through exhaust throttling.

Active route planning for active diesel particulate filter regeneration

The vehicle route choice has great impact on the vehicle operating conditions, but it has rarely been used as a way to create desired vehicle operation and benefit automotive control. This paper presents a route planning algorithm which generates a route that meets the requirement of high-speed driving time from the diesel particulate filter controller for an active diesel particulate filter regeneration. Real-time traffic information is considered when designing the route. A new routing algorithm based on the unconstrained Dijkstra algorithm is developed to approximately solve this consecutive-highway-time-constrained shortest-path problem. A correctness proof of the algorithm is given based on an augmented graph. Examples are provided to show the scenarios in which the proposed routes can facilitate the diesel particulate filter regeneration control without adding too much travel time cost.