Yellow phosphorus preparation method and yellow phosphorus preparation equipment

Abstract

The invention discloses a yellow phosphorus preparation method and yellow phosphorus preparation equipment, which produce no phosphorous slurry and reduce the dust content of tail gas. The yellow phosphorus preparation method comprises the technological processes of electric furnace smelting, furnace gas purifying and phosphorus collecting and refining. In the process of furnace gas purifying, the furnace gas discharged out from an electric furnace is guided into a furnace gas dust-collection system through a smoke discharge pipeline, the furnace gas dust-collection system at least comprises a filter for filtering the furnace gas, the filter is provided with a sintering inorganic porous material filter element meeting the following working conditions, and the operations executed on the filter comprise the operation executed during starting a machine, the operation executed during normal operation, the operation executed during back flowing and the operation executed during stopping the machine; in the operation executed during starting the machine, pre-heated inertia gas is injected into the filter so as to preheat the sintering inorganic porous material filter element in the filter to the temperature of more than 187.5 DEG C, and in the operation executed during the normal operation, the to-be-filtered furnace gas of which the temperature is kept at 420-590 DEG C is input into the filter and the dust content of the filtered clean furnace gas is lower than 10-20 mg / m<3>.

Description

Technical field [0001] This application relates to a preparation method and equipment of yellow phosphorus. Background technique [0002] The industrial application of electric furnace method yellow phosphorus production process is divided into the production process of using large-scale self-baking electrode to make phosphorus electric furnace and the production process of using multi-electrode phosphorus electric furnace. Although these two processes have differences in the type and scale of the electric furnace, the processing requirements of the raw materials into the furnace, and the furnace gas dust removal measures, the main processes are basically the same, that is, they are a 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, passes through the furnace gas filter layer...

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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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