30results about How to "Improve retort effect" patented technology

The invention discloses a drying and dry distillation combined quality improving process and a drying and dry distillation combined quality improving system for low rank coal, which are used for overcoming the defects existing in the prior art and are particularly suitable for drying and dry distillation combined quality improvement of brown coal with high water content or other low rank coal such as long flame coal, non-caking coal or weakly caking coal, gas coal and the like. In the process, a combined quality improving method in which a steam revolving drier for drying and a multi-pipe revolving low-temperature dry distiller for dry distillation are provided is adopted, so that the problems of large coking wastewater handling capacity, large coal gas handling capacity and the like existing in a pure dry distillation process are solved. The drying and multi-pipe revolving low-temperature dry distillation combined quality improving process provided by the invention has the advantages of high energy utilization ratio, safe and stable systems, small dry distillation gas handling capacity, small coking wastewater handling capacity, high tar yield, high coal gas heat value and the like.

The invention discloses a quality-improving technique combining a low-rank coal pneumatic drying with a multi-tube revolving destructive distillation and a system for the same, wherein the technique comprises a coal flow and a hot smoke flow, and both of the coal flow and the hot smoke flow comprise a drying process and a destructive distillation process which are connected with each other; the system comprises a gas flow drying system and a multi-tube revolving destructive distillation system which are connected with each other. The quality-improving technique combining a low-rank coal pneumatic drying with a multi-tube revolving destructive distillation and the system for the same disclosed by the invention realize a cascade efficient utilization for a high-temperature smoke, and increase the energy utilization rate of the whole system. The quality-improving technique combining a low-rank coal pneumatic drying with a multi-tube revolving destructive distillation and the system for the same disclosed by the invention have the advantages of high energy utilization rate, safe and stable system, small treatment capacity for destructive distillation gas, small treatment capacity for coking wastewater, high yield of tar, high calorific value of coal gas etc. The quality-improving technique combining a low-rank coal pneumatic drying with a multi-tube revolving destructive distillation and the system for the same disclosed by the invention also can recover chemical raw materials such as coal tar generated during a low-rank coal low-temperature destructive distillation process, and increase the comprehensive utilization rate of coal. Via the technique, a powdery or granular semicoke which is low in volatile matter, high in low caloric value and good in stability is produced by a quality-improving technique using a low-rank coal low-temperature destructive distillation. The technique is suitable for producing a civil or industrial coal gas with a medium caloric value by a quality-improving technique using a low-rank coal low-temperature destructive distillation.