Water mist dedusting device and dedusting method for brown coal drying upgrading

Abstract

The invention discloses a water mist dedusting device and a dedusting method in a brown coal upgrading process. The dedusting device comprises a dedusting smoke pipeline, a smoke blocking plate, a water mist sprayer, a water mist dedusting tower, a smoke guide plate and the like. Hot smoke containing brown coal dust enters into the dedusting smoke pipeline under the action of a main air induced device, under the action of the smoke blocking plate, the hot smoke is gathered in a pipeline at the position of the water mist sprayer, when the hot smoke meets the water mist which is sprayed out, a part of dust in the smoke can be cleaned and removed, the residual smoke enters into the water mist dedusting tower through an outlet on the upper portion of the smoke blocking plate, rises in a spiral mode under the action of the smoke guide plate and sequentially penetrates through water mist layers formed by sprayed water of the water mist sprayer, and most dust in the smoke is cleaned and removed. The water mist dedusting device and the dedusting method for the brown coal drying upgrading have the advantages that the design is reasonable, the device is safe and reliable, the operation is stable during large-scale applications, the problems that by means of electric dedusting and bag dedusting methods, equipment maintenance costs are high and service lives of devices are short are effectively solved, the efficient and low-pollution comprehensive utilization of the brown coal can be effectively achieved, and the environment-friendly requirements of low carbon, energy conservation and emission reduction are met.

Description

technical field [0001] The invention relates to a dedusting process in the lignite upgrading process, which belongs to the field of clean and efficient utilization of coal. Background technique [0002] Lignite reserves account for about 15% of my country's total coal reserves. It is one of the main coal resources and plays an important role in my country's power and chemical coal. Lignite is a kind of coal with short underground storage period and low degree of coalification. Its moisture and ash content are high, and it is easy to weather in the air. When it is directly used as a direct fuel, its combustion efficiency is low, and its solid dust and greenhouse gas emissions are high. serious pollution. Lignite is mainly distributed in Inner Mongolia, Heilongjiang, Yunnan, Xinjiang and other places. Due to economic development, the coal consumption in these areas is less than that in economically developed areas, so lignite needs to be transported to distant utilization sit...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the existing dedusting technology in the lignite upgrading process, the present invention provides a high-efficiency water mist dedusting device and process method with good dedusting effect, easy use and maintenance, and stable performance

Images