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Air purification method through dehumidifying and dedusting with phosphoric acid adsorption

A technology for purifying air and phosphoric acid, which is applied in the field of air purification, can solve the problems of high cost of air dehumidification and dust removal, low utilization rate of raw materials for thermal phosphoric acid production, and poor quality of air purification, so as to achieve good economic benefits, reduce energy consumption and Cost, the effect of improving the utilization rate

Inactive Publication Date: 2013-10-16
GUANGXI MINGLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the poor quality of air purification, there are problems such as low utilization rate of raw materials for thermal phosphoric acid production, poor product quality, serious equipment corrosion, and high purification costs for air dehumidification and dust removal.

Method used

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  • Air purification method through dehumidifying and dedusting with phosphoric acid adsorption
  • Air purification method through dehumidifying and dedusting with phosphoric acid adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, in the production of thermal phosphoric acid, open the three air inlets in the lower section of the packing absorption purification tower, start the negative pressure fan P=13000Pa, and control the wind speed at 3m / s; transport the thermal phosphoric acid of hydration reaction with an acid-resistant pump Evenly spray thermal phosphoric acid on the top of the packing absorption and purification tower to absorb moisture and dust in the air, making the air humidity 29-34%; the purified air after dehumidification and dust removal is purified by the negative pressure caused by the tail fan of thermal phosphoric acid production, One part leads to the combustion furnace, and the other part leads to the degassing tank, which is used for phosphorus combustion and blowing off H in dearsenic phosphoric acid 2 S gas, thermal phosphoric acid after absorbing air moisture and dust returns to the hydration tower, and is recycled for hydration reaction and absorbing m...

Embodiment 2

[0030] In this embodiment, in the production of thermal phosphoric acid, the air inlet of the lower section of the spray absorption purification tower is opened, and the positive pressure fan P=5000Pa is started to keep the wind speed at 4m / s; Evenly spray thermal phosphoric acid on the top of the spray absorption purification tower to absorb moisture and dust in the air, making the air humidity 35-38%; the purified air after dehumidification and dust removal is partly passed into the combustion chamber by means of positive pressure caused by the fan The other part leads to the degassing tank, which is used for phosphorus combustion and blowing off H in dearsenic phosphoric acid 2 S gas, thermal phosphoric acid after absorbing air moisture and dust returns to the acid storage tank, and is recycled to absorb moisture and dust in the air.

Embodiment 3

[0032] In this embodiment, in the production of thermal phosphoric acid, the four air inlets of the lower section of the spray absorption purification tower are opened, and the negative pressure fan P=17000Pa is started to keep the wind speed at 5m / s; The pump is sent to the top of the spray absorption purification tower to evenly spray thermal phosphoric acid to absorb moisture and dust in the air, and control the air humidity to 37-40%. Negative pressure, one part leads to the combustion furnace, and the other part leads to the degassing tank, which is used for phosphorus combustion and blowing off H in dearsenic phosphoric acid 2 S gas, thermal phosphoric acid that absorbs air moisture and dust returns to the acid storage tank, and is recycled to absorb moisture and dust in the air.

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Abstract

The invention discloses an air purification method through dehumidifying and dedusting with phosphoric acid adsorption. The method is characterized in that phosphoric acid is adopted as an air cleanser, the air inlet of the lower segment of a purification tower is opened, a fan is started, purification processing of dehumidification and dedusting is carried out by uniformly sprinkling phosphoric acid on the purification tower or utilizing phosphoric acid in a purification groove, and purified air having a humidity of less than 40% and a high purity is obtained by wind speed control; and phosphoric acid absorbed with water and dust enters an acid storage groove or a hydration tower for cycle use. The purified air prepared in the invention can be applied to the industry of building materials, the chemical industry, the heating ventilation industry, the industry of air conditionings, the textile industry, the electronic industry, and the like. The method of the present invention which allows a problem of energy consumption needed by regeneration of an adsorbent to be solved, the continuity of the air purification process to be realized, and diluted phosphoric acid after adsorption tobe used as a low concentration product for sale or to be used for further phosphoric acid hydration has the advantages of energy consumption and cost reduction in air purification, and good economic benefit.

Description

Technical field: [0001] The invention belongs to the technical field of air purification, and relates to an air purification method, in particular to a method for purifying air by using phosphoric acid for adsorption, dehumidification and dust removal. Background technique: [0002] Thermal phosphoric acid is the combustion of yellow phosphorus in the air to produce P 2 o 5 , and then made by hydration absorption. Phosphoric acid is a medium strong acid with strong water absorption. P produced by combustion 5 o 2 It is very easy to combine with water, and under different water amounts and reaction conditions, it will form mixtures such as metaphosphoric acid, pyrophosphoric acid and tripolyphosphoric acid, which will increase the phosphorus consumption and reduce the quality of the product; the air used for combustion plays a role in the production of phosphoric acid. It plays a pivotal role. The air often contains a mixture of moisture, dust and other foreign matter. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D47/06B01D53/28C01B25/18
Inventor 林军吴小海马钊松韦仕能何忠华黄新兴苏杰文王文营王波韦腾渊谭培渊彭艳霞
Owner GUANGXI MINGLI CHEM