Dedusting and phosphorus collecting system and dedusting and phosphorus collecting method

Abstract

The invention belongs to the technical field of green production of yellow phosphorus industry, and particularly relates to a dust removal and phosphorus collection system and a dust removal and phosphorus collection method.The dust removal and phosphorus collection system comprises a high-temperature dust remover, an n-stage heat exchanger, a spraying condenser, an atomization spraying device and a phosphorus collection tank; a gas inlet of the high-temperature dust remover is connected with a yellow phosphorus crude furnace gas conveying pipe, and the high-temperature dust remover is connected with the n-stage heat exchanger and the spraying condenser in series; the bottom of the nth-stage heat exchanger and the bottom of the spraying condenser are both communicated with the phosphorus receiving tank; each stage of heat exchanger of the n stages of heat exchangers is provided with a cooling water inlet and a cooling water outlet, and the cooling water outlet is connected with a waste heat recovery device; the atomization spraying device is respectively communicated with the top of the nth-stage heat exchanger and the top of the spraying condenser; and the top of the spray condenser is also communicated with a spray water input pipe. The method has the advantages of water saving, coal saving, emission reduction of wastewater discharge, emission reduction of phosphorus-containing sludge and the like.

Description

technical field [0001] The invention belongs to the technical field of green production of yellow phosphorus industry, and particularly relates to a grading heat exchange less water or no water phosphorus collecting system and a phosphorus collecting method in a yellow phosphorus electric furnace production process. Background technique [0002] In the production process of the yellow phosphorus electric furnace, the condensation phosphorus collection process combining spraying, dust removal and washing is adopted. The process flow is shown in figure 1 , the technical problems are: [0003] (1) The yellow phosphorus furnace gas directly enters the condensation phosphorus collection system without dust removal, and the dust content brought by the yellow phosphorus furnace gas is relatively high (generally 50-150g / m2). 3 ), the dust will be contained by the condensed phosphorus droplets during the condensation process, forming a compact mud phosphorus impurity. Dust not only...

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Problems solved by technology

[0013] The object of the present invention is to provide a system and method for dust removal and phosphorus collection. This system solves the difficulty in phosphorus refining, large amount of sludge phosphorus treatment, and low quality of yellow phosphorus brought about by the traditional spraying, dust removal and washing combined into one condensation phosphorus collection process. Technical problem with low yield

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