Yellow phosphorus production method and equipment

Abstract

The invention discloses a yellow phosphorus production method and equipment which do not produce mud phosphorus and can reduce the dust content in tail gas. The method comprises the technology links as follows: 1, electric furnace smelting; 2, furnace gas purification, furnace gas discharged from an electric furnace is guided into a furnace gas dust collecting system through an exhaust pipeline, the furnace gas dust collecting system comprises at least a filter used for filtering the furnace gas, the filter is provided with a sintering inorganic porous material filter element capable of meeting following work conditions, and the operation performed according to the filter comprises the steps as follows: 1), the operation executed during driving: inert preheating gas is injected into the filter, and the sintering inorganic porous material filter element in the filter is heated to 187.5 DEG C or above; 2), the operation executed during normal operation: to-be-filtered furnace gas with the temperature maintained to be 187.5-280 DEG C is input into the filter, and the dust content in the filtered clean furnace gas is below 10-20 mg / m <3>; and 3), the operation executed during reverse blowing and 4) the operation executed during parking; and 3, phosphorus collecting and refining.

Description

technical field [0001] The application relates to a production method and equipment of yellow phosphorus. Background technique [0002] The electric furnace yellow phosphorus production process for industrial application is divided into the production process using large-scale self-baked electrode phosphorus electric furnace and the production process using multi-electrode phosphorus electric furnace. Although the two processes are different in the type and scale of the electric furnace, the requirements for the treatment of raw materials into the furnace, and the dust removal measures for the furnace gas, the main process is basically the same, that is, the mixture of phosphate rock, silica and coke in proportion. The material is fed into the electric furnace, and the mixture in the electric furnace undergoes a reduction reaction to generate furnace gas. The furnace gas escapes from the reaction melting zone, and after passing through the furnace gas filter layer formed by ...

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Problems solved by technology

[0005] Although the production process of the above-mentioned large-scale self-baking electrode phosphorus production furnace can produce less sludge phosphorus and waste water, the construction cost of the electrostatic precipitator supporting facilities is huge, the operation and maintenance costs are high, and the technical requirements for personnel are high, and the furnace gas The dust purification treatment is not sufficient, which cannot ideally solve the problem of PM2.5 emission in the exhaust gas

However, the production process using multi-electrode phosphorus electric furnace will produce a large amount of sludge phosphorus that is difficult to separate, and the dust content in the tail gas is higher

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