Method and device for preventing yellow phosphorus furnace gas conveying pipeline from being blocked and removing dust

Abstract

The invention discloses a method and device for preventing a yellow phosphorus furnace gas conveying pipeline from being blocked and removing dust, and the method comprises the following steps thatyellow phosphorus furnace gas generated in the process of producing yellow phosphorus by an electric furnace method is introduced into a heater for heating, then the gas is conveyed through a heat preservation pipe coupled with a multi-layer structure, and finally the gas is enabled to enter a sealed heat preservation electric bag dust remover; yellow phosphorus furnace gas firstly enters an electricdust removal area of the device, a cathode in the electric dust removal area performs corona discharge, dust in the yellow phosphorus furnace gas is charged and moved to an anode to be deposited on the anode, ash is removed through electrode vibration, the yellow phosphorus furnace gas subjected to electric dust removal enters a cloth bag dust removal area, residual dust is filtered through a cloth bag, the cloth bag is subjected to pulse ash removal, and finally, dust and gas in the yellow phosphorus furnace gas are separated; according to the method and the device, the problem that the pipeline is blocked due to agglomeration caused by temperature reduction in the yellow phosphorus furnace gas conveying process is solved, meanwhile, dust and gas in the yellow phosphorus furnace gas areseparated, and the method and the device have the advantages of high removal efficiency, high practicability, reasonable structure, small occupied area and the like.

Description

technical field [0001] The invention belongs to the technical field of purification of yellow phosphorus furnace gas, and in particular relates to a method and a device for preventing blockage of pipelines for conveying yellow phosphorus furnace gas and removing dust. Background technique [0002] With the development of the chemical industry, the amount of waste gas discharged every year is increasing year by year. Electric furnaces are widely used in phosphorus chemical industry, non-ferrous metallurgy, coal chemical industry and other fields. The composition of the furnace gas produced is complex, which brings serious pollution to the environment. Processing standards are getting stricter. [0003] During the transportation of yellow phosphorus furnace gas, due to the influence of factors such as long pipelines and weak pipeline insulation capabilities, the temperature inside the tube drops. When the temperature is lower than the dew point temperature of yellow phosphorus...

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Problems solved by technology

[0003] During the transportation of yellow phosphorus furnace gas, due to the influence of factors such as long pipelines and weak pipeline insulation capabilities, the temperature inside the tube drops. When the temperature is lower than the dew point temperature of yellow phosphorus at 180°C, the phosphorus vapor will cool down and become liquid yellow phosphorus. blockage of pipelines, resulting in difficulties in pipeline transportation and safety risks; at present, the pipelines of yellow phosphorus tail gas in some yellow phosphorus plants need manual intervention to avoid phosphorus vapor dew point cooling and agglomeration to block pipelines, which consumes manpower and material resources, and some yellow phosphorus plants The pipeline for transporting yellow phosphorus tail gas adopts the method of jacketed pipe steam heating pipeline, which has problems such as energy consumption and complicated process

[0004] For the purification of yellow phosphorus furnace gas, most of the domestic use of wet spray dedusting technology, this method not only consumes a lot of water, but also forms a large amount of by-product sludge phosphorus that needs subsequent treatment, while most of the current dry dedusting equipment Failure to meet the requirements, mechanical dust removal can only remove large particles of dust, bag dust removal requires that the temperature should not be lower than the dew point temperature of the furnace gas, which is not suitable for removing dust with strong viscosity, limited by temperature, the structure of electrostatic dust removal is complicated, and more rationalization is needed Dust cleaning is an important part of dust removal. The current methods of mechanical vibration and pulse cleaning have problems such as high energy consumption and high equipment maintenance rate.

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