Unlock instant, AI-driven research and patent intelligence for your innovation.

New phosphorus sludge emulsion strengthened phosphorite slurry liquid-phase denitrification technology

A technology of phosphate rock slurry and emulsion, applied in the field of air pollution purification, can solve the problems of complicated operation, high cost, and high cost

Inactive Publication Date: 2018-08-24
YUNNAN MINZU UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using hydrogen peroxide as an oxidant to denitrify at low temperature requires strict control of the temperature, and the cost is high.
[0006] Chinese patent CN106377987A discloses a flue gas wet denitrification device and a flue gas wet denitrification method in which NO is oxidized to NO through the bubbling bed oxide layer 2 , and then absorb NO through the lye absorption tower 2 Denitrification, although the denitrification efficiency is high, but the experimental equipment is relatively complicated, the cost is too high, and the operation is complicated, which is not conducive to saving manpower and material resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • New phosphorus sludge emulsion strengthened phosphorite slurry liquid-phase denitrification technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The phosphate rock from a phosphate fertilizer factory in Yunnan Province was dried at 110°C for 2 hours. The phosphate rock was crushed, ground and sieved to obtain 200-mesh fine particles. 10g of the phosphate rock was accurately weighed in an absorption bottle, and 40mL of distilled water was added to make a phosphate rock slurry; Accurately weigh 4g of mud phosphorus, configure it into an emulsion, mix it evenly with phosphate rock slurry, and configure it into an absorption solution with a mass ratio of mud phosphorus to phosphate rock of 2:5; the absorption device is placed in a constant temperature water bath, and the temperature is controlled at 60 ℃, configure NO gas (volume fraction 0.08%, N 2 As the balance gas) the concentration is 500ppm, and dry air is blown in; the airflow rate is 0.3 L / min, and the experimental operation reaction is carried out under this condition for 250min. Use a flue gas analyzer to measure the NO content at the outlet, and calculate...

Embodiment 2

[0022] The phosphate rock from a phosphate fertilizer factory in Yunnan Province was dried at 110°C for 2 hours. The phosphate rock was crushed, ground and sieved to obtain 200-mesh fine particles. Accurately weighed 5g of the phosphate rock into an absorption bottle, and added 20mL of distilled water to make a phosphate rock slurry; Accurately weigh 2g of mud phosphorus, configure it into an emulsion, mix it evenly with phosphate rock slurry, and configure it into an absorption solution with a mass ratio of mud phosphorus to phosphate rock of 2:5; the absorption device is placed in a constant temperature water bath, and the temperature is controlled at 60 ℃, configure NO gas (volume fraction 0.08%, N 2 As the balance gas) the concentration is 500ppm, and dry air is blown in; the airflow rate is 0.3 L / min, and the experimental operation reaction is carried out under this condition for 250min. Use a flue gas analyzer to measure the NO content at the outlet, and calculate the re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a new phosphorus sludge emulsion strengthened phosphorite slurry liquid-phase denitrification technology, wherein phosphorus sludge and oxygen induce the generation of ozone asan oxidant so as to synergistically carry out catalytic oxidation with phosphorite slurry, NO is oxidized into water-soluble NO2 and a small amount of N2O5, and NO2 and N2O5 are absorbed by an absorption liquid so as to effectively improve the liquid-phase denitrification efficiency. According to the present invention, the phosphorus sludge emulsion and the phosphorite slurry are used as the absorption liquid, and react with the NOX in the flue gas, wherein the denitrification efficiency of 87% can be maintained for 240 min under the following reaction conditions that the solid-liquid ratio of the phosphorite slurry is 0.25 g / mL, the phosphorus sludge addition amount is 2 g, the operating temperature is 60 DEG C, the gas flow rate is 0.3 L / min, and the oxygen content is 20%; and the method has advantages of simple process, low investment, easy operation and low secondary pollution, and can be used for the removal of NOX in the tail gas of fossil-fuel power station.

Description

technical field [0001] The invention relates to a new technology of mud phosphorus emulsion combined with phosphate rock slurry phase denitrification, and belongs to the technical field of air pollution purification. Background technique [0002] Nitrogen oxides (NO X ) is one of the main pollutants in the atmosphere of our country. Industrial nitrogen oxide emissions account for 63.8% of the national nitrogen oxide emissions. In recent years, with the growth of my country's economy and the development of the power industry, coal-fired NO X Also increasing day by day, my country's air pollution is facing a severe situation. The NO in the exhaust gas is stable in nature, insoluble in water, and extremely difficult to be removed, which is the difficulty of flue gas denitrification. [0003] Post-combustion denitrification technology is the X The most important control measures can be divided into two categories: dry method and wet method. Compared with dry method denitrific...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/18B01D53/14
CPCB01D53/1456B01D53/18B01D2252/10B01D2257/40Y02A50/20
Inventor 贾丽娟李紫珍覃岭宁平刘天成王访高冀芸刘晨辉
Owner YUNNAN MINZU UNIV