Low-temperature dew point corrosion experiment method for phosphorus in yellow phosphorus tail gas on boiler material and device thereof

Abstract

The invention relates to a low-temperature dew point corrosion experiment method for phosphorus in yellow phosphorus tail gas on a boiler material, and a device thereof, in particular to a yellow phosphorus tail gas phosphorus component low-temperature dew point corrosion experiment method and a device for implementing the method. A yellow phosphorus tail gas phosphorus component low-temperature dew point corrosion experiment system is contained, and consists of a heating temperature control system, a condensation reflux system and a tail gas treatment system. The experiment heating temperature control device adopts an air heating jacket, and has good temperature control capacity and quick, even and stable heating; and a tail gas absorbing device is arranged, so pollution is free in the experiment. The method and the device can perform dew point corrosion study on acids, can better simulate the low-temperature dew point corrosion of impurities such as the phosphorus on the boiler material in the yellow phosphorus tail gas comprehensive utilization, and also can be used for comprehensive utilization study on other industrial waste gases (tail gases).

Description

technical field [0001] The invention relates to a low-temperature dew-point corrosion test method, in particular to a low-temperature dew-point corrosion simulation test method for phosphorus components in yellow phosphorus tail gas. Background technique [0002] A large amount of yellow phosphorus tail gas is produced in the production process of the yellow phosphorus industry, and the production of 1 ton of yellow phosphorus produces about 2500-3000Nm of yellow phosphorus tail gas 3 . Taking the national yellow phosphorus production of 830,700 tons in 2006 as an example, the yellow phosphorus tail gas production was as high as 2.3 billion Nm 3 . According to analysis, the composition of yellow phosphorus tail gas is complex, containing a large amount of greenhouse gases (CO 85% ~ 95% V) and harmful components (phosphorus, sulfur, arsenic, etc.). Air Pollution. In recent years, various places have promulgated the "Yellow Phosphorus Industry Access Conditions", which wil...

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Problems solved by technology

Because the phosphorus and sulfur in the yellow phosphorus tail gas are difficult to be efficiently purified, the pH 3 ,P 4 and H 2 S burns to form P 2 o 5 and SO 2 , when encountering H in an open system 2 After O, highly corrosive phosphoric acid and sulfuric acid are formed, and severe low-temperature dew point corrosion is prone to occur when the boiler is operating at a lower temperature, especially for the superheated tube and drum. Severe thinning, even perforation, reduced boiler life

[0005] Therefore, at present, the yellow phosphorus tail gas in my country has not been well utilized as a boiler fuel resource due to its severe corrosion.

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