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Yellow phosphorus tail gas purification method and system

A yellow phosphorus tail gas and purification system technology, which is applied in combustible gas purification, combustible gas purification/transformation, petroleum industry, etc., can solve problems such as boiler corrosion, high energy consumption, and poor purification effect, and achieve investment cost reduction and operation The effect of low energy consumption and low consumption

Inactive Publication Date: 2015-12-09
西安新环能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purification effect of water washing + alkali washing method is not good, resulting in serious corrosion of the boiler, and it is difficult to operate stably for a long time; while using catalytic oxidation method, catalyst regeneration is difficult, energy consumption is high, and production costs remain high

Method used

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  • Yellow phosphorus tail gas purification method and system
  • Yellow phosphorus tail gas purification method and system

Examples

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Effect test

Embodiment 1

[0021] The method for purifying yellow phosphorus tail gas of the present invention comprises the following steps: washing the yellow phosphorus tail gas with water at a temperature of 10° C. to remove dust and part of the phosphorus element; carrying out alkali washing on the washed yellow phosphorus tail gas to remove SO 2 、H 2 S and other acidic gases; the yellow phosphorus tail gas after alkali washing is oxidized in the first-stage oxidation solution to remove PH 3 , the first oxidation solution is KMnO 4 , the mass concentration of the first-stage oxidation solution is 0.8%; the oxidized yellow phosphorus tail gas is neutralized with NaOH solution to obtain the purified yellow phosphorus tail gas, and the mass concentration of the NaOH solution is 0.3%. The oxidized yellow phosphorus tail gas is subjected to a second oxidation treatment to remove residual pH 3 , the second oxidation solution used in the second oxidation treatment is KMnO 4 , the mass concentration of ...

Embodiment 2

[0028] The difference between this example and Example 1 is that the yellow phosphorus tail gas is washed with water at a temperature of 10°C to remove dust and some phosphorus elements; the washed yellow phosphorus tail gas is washed with alkali to remove SO 2 、H 2 S and other acidic gases; the yellow phosphorus tail gas after alkali washing is oxidized in the first-stage oxidation solution to remove PH 3 , the first oxidation solution is NaClO 3 , the mass concentration of the first-stage oxidation solution is 0.6%; the oxidized yellow phosphorus tail gas is neutralized with NaOH solution to obtain the purified yellow phosphorus tail gas, and the mass concentration of the NaOH solution is 0.6%. The oxidized yellow phosphorus tail gas is subjected to a second oxidation treatment to remove residual pH 3 , the second oxidation solution used in the second oxidation treatment is NaClO 3 , the mass concentration of the oxidation solution is 2%.

Embodiment 3

[0030] The difference between this example and Example 1 is that the yellow phosphorus tail gas is washed with water at a temperature of 15°C to remove dust and part of the phosphorus element; the washed yellow phosphorus tail gas is washed with alkali to remove SO 2 、H 2 S and other acidic gases; the yellow phosphorus tail gas after alkali washing is oxidized in the first-stage oxidation solution to remove PH 3 , the first oxidation solution is KClO 3 , the mass concentration of the first-stage oxidation solution is 0.6%; the oxidized yellow phosphorus tail gas is neutralized with NaOH solution to obtain the purified yellow phosphorus tail gas, and the mass concentration of the NaOH solution is 0.6%. The oxidized yellow phosphorus tail gas is subjected to a second oxidation treatment to remove residual pH 3 , the second oxidation solution used in the second oxidation treatment is KClO 3 , the mass concentration of the secondary oxidation solution is 2%.

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Abstract

The invention discloses a yellow phosphorus tail gas purification method and system. The method comprises the following steps: washing yellow phosphorus tail gas at 10-15 DEG C to remove dust and part of elemental phosphorus; carrying out alkali wash on washed yellow phosphorus tail gas to remove acidic gas such as SO2, H2S and the like; introducing the yellow phosphorus tail gas after alkali wash into a first level oxidizing solution to be oxidized to remove PH3, wherein the first level oxidizing solution is one of KMnO4, NaClO3, KClO3 and Ca(ClO3)2 or combination of one, two or various of NaClO3, KMnO4, KClO3 and Ca(ClO3)2, and the mass concentration of the first level oxidizing solution is 0.4-0.8%; and neutralizing the oxidized yellow phosphorus tail gas by a NaOH solution to obtain purified yellow phosphorus tail gas. The yellow phosphorus tail gas purification method effectively removes harmful impurities and is low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of yellow phosphorus tail gas treatment and combustion power generation utilization, and in particular relates to a yellow phosphorus tail gas purification method and system. Background technique [0002] my country is the main producer of yellow phosphorus in the world. In recent years, the output of yellow phosphorus in my country has basically remained at 800,000 to 1 million tons per year, correspondingly producing 2 billion to 2.5 billion m3 of by-product yellow phosphorus tail gas. 3 . The production of yellow phosphorus is mainly to add phosphate rock, silica and coke into the electric furnace, and the materials are melted in the electric furnace and undergo various chemical reactions such as phosphorus reduction to produce phosphorus vapor and electric furnace slag. The furnace gas enters four series-connected condensation towers and sprays water to recover the phosphorus in the furnace gas. After ...

Claims

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Application Information

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IPC IPC(8): C10K1/00C10K1/10C10K1/12
Inventor 张红卫李文举
Owner 西安新环能源有限公司
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