Large-scale low-order brown coal upgrading tower

Abstract

The invention relates to a large-scale low-order brown coal upgrading tower, which is used for solving the problem of the industrial destructive distillation of low-order brown coal. The large-scale low-order brown coal upgrading tower comprises a tower body, a combustor, a coal bunker and a screw feeder, wherein the coal bunker and the screw feeder are positioned on the top of the tower body, and a carbocoal outlet is formed on the lower part of the tower body; the tower body consists of a plurality of unit towers which are arranged longitudinally in a laminated mode; a uniformly-distributed plate, an anti-wearing tile and a heating pipe are arranged in each unit tower from top to bottom; high-temperature flue gas discharged from the combustor enters the heat pipe in each unit tower sequentially from bottom to top from an S-shaped high-temperature flue; each unit tower is provided with a gas transfer pipe; a gas valve is arranged on the transfer pipe; and the unit tower positioned on the uppermost part is provided with a discharge flue. The upgrading tower consists of a plurality of unit towers, so the structure is convenient to manufacture and mount, and products are easy to form. Due to the adoption of a continuous production mode, the large-scale low-order brown coal upgrading tower is suitable for large-scale industrial production, is simple in equipment and easy to implement, and provides an effective path for the utilization of the low-order brown coal.

Description

technical field [0001] The invention relates to a dry distillation technology, in particular to a large-scale low-order lignite upgrading tower used for upgrading the low-order lignite. Background technique [0002] In recent years, with the rapid development of the world economy and the continuous consumption of natural resources, there has been a serious shortage of coal resources. In 2008 alone, the global coal shortage was 25 million to 35 million tons, and by the end of 2009, this figure reached 70 million tons. The geological reserves of lignite on the earth are about 4 trillion tons, accounting for about 40% of coal reserves. In the face of the increasing shortage of coal resources, the utilization of lignite, a low-rank coal resource that is not mentioned by people, is now being gradually on the agenda. Lignite has low degree of coalification, high moisture, easy weathering and fragmentation in the air, low calorific value, and inconvenient long-distance transporta...

AI Technical Summary

Problems solved by technology

If the heat carrier of the upgrading equipment adopts solid heat transfer, the system will have problems such as difficult sealing, complicated rotating lifting equipment, and excessive ash content of semi-coke due to wear of the heat carrier; if a mature sealing system is used in the industrialization stage, it will cause obvious system problems. Excessive investment affects product sales and market share

The various process defects of the above existing technologies make the lignite drying and upgrading process in the scale demonstration stage

Images