Phosphorus pentoxide reinforced air cooling production method and equipment

A technology of phosphorus pentoxide and production method, applied in the direction of phosphorus oxide, etc., can solve the problems of large equipment investment, low output, high cost, etc., and achieve the effect of large equipment investment, high cost, and increased production capacity

Active Publication Date: 2013-03-27
广西越洋化工实业集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this air-cooled phosphorus pentoxide production new technology invention is to overcome the deficiencies in the prior art and solve the problems of high cost, large equipment investment and low output in the traditional production method of natural cooling for phosphorus pentoxide. Proposed a new production method of phosphorus pentoxide enhanced air-cooled production

Method used

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  • Phosphorus pentoxide reinforced air cooling production method and equipment
  • Phosphorus pentoxide reinforced air cooling production method and equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0029]The yellow phosphorus flows into the combustion furnace for combustion at a flow rate of 150 kg per hour. The selected fan is a 9-26-5A high-pressure centrifugal fan (rated air volume is 6349 cubic meters per hour), and the actual input of dry air is about 5000 cubic meters. 150 kg of yellow phosphorus needs about 200 kg of oxygen, and the input of 5000 cubic meters of dry air contains about 1200 kg of oxygen, that is, the amount of raw materials used in the production process is carried out according to the oxygen-enriched operation (about 1:6). . The production temperature of the combustion furnace is controlled at 500°C to 900°C, the inlet temperature of the circulating cooling water is 40°C to 50°C, the outlet temperature is 85°C to 95°C, and the continuous combustion is 20 to 40 hours each time, and the continuous production is assessed for one month. The operation is stable, and there are no phenomena such as equipment burning red, pipe blockage, thick smoke from t...

Embodiment 1 5

[0030] Embodiment 1 phosphorus pentoxide product quality:

[0031] Indicator name

[0032] The quality after the purified phosphoric acid of embodiment 1 gained is as follows:

[0033] Indicator name

[0034] Sulfate (as SO 4 2- count),%

Embodiment 2

[0036] The yellow phosphorus flows into the combustion furnace for combustion at a flow rate of 200 kg per hour. The selected fan is still a 9-26-5A high-pressure centrifugal fan (rated air volume is 6349 cubic meters per hour), and the actual input of dry air is about 5000 cubic meters per hour. Burning 200 kilograms of yellow phosphorus requires about 260 kilograms of oxygen, and the input 5000 cubic meters of dry air contains about 1200 kilograms of oxygen, and the oxygen enrichment ratio (about 1:4.6) used in the production process is slightly smaller. The production temperature of the combustion furnace is controlled at 600°C to 1000°C, the inlet temperature of the circulating cooling water is 40°C to 50°C, the outlet water temperature is 85°C to 98°C, and the continuous combustion is 20 to 40 hours each time, and the continuous production is 7 days for assessment and equipment operation Stable, there is no phenomenon such as equipment burning red, pipe blockage, chimney s...

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Abstract

The invention belongs to the technical field of phosphorus chemical product production in inorganic chemical industry, and relates to a brand new phosphorus pentoxide production technology. The technical process comprises the following steps: performing 80% sulfuric acid and 98% sulfuric acid two-stage series drying on air, and then continuously blowing into a combustion furnace with a water cooling jacket; flowing purified yellow phosphorus into the combustion furnace, and continuously performing oxidation combustion to generate phosphorus pentoxide smoke; sequentially guiding the smoke into two cooling settlement towers with multiple ventilation pipes, performing cooling settlement, and then packaging; and finally, guiding the residual small amount of phosphorus pentoxide smoke into a tail gas recovery acid tower for producing a phosphoric acid byproduct, and emptying the excessive air. Above all, the multiple ventilation pipes which run through the cooling settlement towers from bottom to top and are uniformly distributed are designed in the cooling settlement towers, so that natural air can absorb the heat of the phosphorus pentoxide smoke through the pipe walls to expand and travel upwards and be blown out from air pipe nozzles at the tops of the towers, and supplemented cold air enters the towers from the bottoms to form a large amount of air flow so as to take away the heat, thereby greatly improving the productivity.

Description

technical field [0001] The invention belongs to the technical field of production of phosphorus chemical products in the inorganic chemical industry, and is a brand-new production technology of phosphorus pentoxide. Application prospect. Background technique [0002] Phosphorus pentoxide is a highly deliquescent white powder. It reacts violently with water and organic matter such as wood, cotton or grass, releasing a lot of smoke and heat, which can cause combustion. It is a common raw material and reagent in the chemical industry. It is mainly used as a gas and liquid desiccant, a dehydrating agent for organic synthesis, a pharmaceutical refining analysis reagent, and an organic phosphate emulsifier. It is widely used in medicine, coating additives, printing and dyeing additives, Antistatic agent, titanate coupling agent, pesticide, phosphorus oxychloride chemical industry and other industries. High-quality phosphorus pentoxide can also be used to produce high-purity pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/12
Inventor 林明印华亮
Owner 广西越洋化工实业集团有限公司
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