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

Medicament stabilizing method of fly ashes in incineration of medical wastes

A technology for incinerating fly ash and medical waste, applied in the field of medical waste incineration fly ash chelation solidification/stabilization treatment, medical waste incineration fly ash harmless treatment field, can solve the problem of high cost, not enough attention, targeted To solve problems such as lack of natural processing technology, to achieve the effect of saving space and reducing processing costs

Active Publication Date: 2015-04-22
南京希捷环保科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the chemical agent method is that it is more expensive
[0013] The properties of fly ash from medical waste incineration and domestic waste incineration are somewhat different. Therefore, the treatment technology for fly ash from domestic waste incineration is not completely suitable for fly ash from medical waste incineration. Due to the relatively small amount of fly ash produced by medical waste incineration, it has not yet Sufficient attention, targeted processing technology is also very scarce

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
  • Medicament stabilizing method of fly ashes in incineration of medical wastes
  • Medicament stabilizing method of fly ashes in incineration of medical wastes
  • Medicament stabilizing method of fly ashes in incineration of medical wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dry the fly ash of medical waste incineration at 105°C for 24 hours, and evenly add 10% (mass percentage) humic acid to the dried medical waste incineration fly ash (commercial humic acid: humic acid content> 90%, burning residue <5%, water content <8%), that is, the humic acid / medical waste incineration fly ash ratio is 0.1, humic acid is evenly sprayed in the medical waste incineration fly ash in the form of mist spray, and the mixture is kept at room temperature for 30 sky.

[0028] The cured body is tested using the national standard HJ / T299-2007 toxic leaching procedure. The test uses 3 parallel samples, and the test results take the average value of the 3 parallel samples.

[0029] Table 1 is the chemical composition of fly ash from medical waste incineration, Table 2 is the heavy metal content in fly ash from medical waste incineration, Table 3 is the leaching characteristics of heavy metals in fly ash from medical waste incineration, and Table 4 is the fixation ...

Embodiment 2

[0042]Dry the fly ash of medical waste incineration at 105°C for 24 hours, and evenly add 20% (mass percentage) of humic acid to the dried medical waste incineration fly ash (commercial humic acid: humic acid content> 90%, burning Residue <5%, water content <8%), that is, the ratio of humic acid / medical waste incineration fly ash is 0.2, humic acid is evenly sprayed in the medical waste incineration fly ash in the form of mist spray, and the mixture is kept at room temperature for 20 sky.

[0043] The cured body is tested using the national standard HJ / T299-2007 toxic leaching procedure. The test uses 3 parallel samples, and the test results take the average value of the 3 parallel samples. Table 6 shows the leaching characteristics of heavy metals after medical waste incineration fly ash is fixed / stabilized with humic acid. It can be seen that the leaching concentration of Pb has dropped significantly, only 502 μg / L, which is far lower than the 5000 μg of the hazardous waste ...

Embodiment 3

[0053] Dry the fly ash of medical waste incineration at 105°C for 24 hours, and evenly add 30% (mass percentage) of humic acid (commercial humic acid: humic acid content > 90%) to the dried medical waste incineration fly ash residue <5%, water content <8%), that is, the humic acid / medical waste incineration fly ash ratio is 0.3, humic acid is evenly sprayed in the medical waste incineration fly ash in the form of mist spray, and the mixture is kept at room temperature for 30 sky.

[0054] The cured body is tested using the national standard HJ / T299-2007 toxic leaching procedure. The test uses 3 parallel samples, and the test results take the average value of the 3 parallel samples. Table 9 shows the leaching characteristics of heavy metals after the fly ash of medical waste incineration is fixed / stabilized by humic acid.

[0055] It can be seen that after fixing / stabilizing with humic acid, the leaching concentration of Cr decreased to 202 μg / L, the leaching concentration of ...

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 relates to a medicament stabilizing method of fly ashes in the incineration of medical wastes, which mainly aims at the characteristics of high chlorine content, high sulphur content, high basic oxide content and high calcium-silicon ratio of fly ashes in the incineration of medical wastes so as to provide an economic innocent treatment method with low pollution for fly ashes in the incineration of medical wastes. According to the method, the components of fly ashes in the incineration of medical wastes are firstly measured, and the fly ashes in the incineration of the medical wastes and humic acid are prepared according to mass percent, wherein the addition proportions of the humic acid are respectively 10 percent, 20 percent and 30 percent; and the mixture is kept for 20 days or 30 days at room temperature, and a heavy metal complex is generated by utilizing the humic acid and heavy metal in the fly ashes in the incineration of the medical wastes. According to the medicament stabilizing method of the fly ashes in the incineration of the medical wastes, the heavy metal is fixed by utilizing the humic acid, so that the volume is not increased in capacity basically after the fly ashes in the incineration of the medical wastes are treated. The space of safe landfill is saved, so that the treatment expense is obviously lowered.

Description

technical field [0001] The invention relates to a method for harmless treatment of fly ash from incineration of medical waste, in particular to a method for chelation solidification / stabilization treatment of fly ash from incineration of medical waste containing heavy metals, and belongs to the technical field of hazardous waste treatment. Background technique [0002] Medical waste is a special pollutant. In 2002, the total amount of medical waste produced nationwide was about 650,000 tons, with an average daily production of 1,780 tons. In 2010, the number of beds in medical institutions increased by 5% compared with 2002, and the amount of medical waste generated reached 680,000 tons. Although its output accounts for only 3% of municipal solid waste, it may contain a variety of infectious bacteria, viral chemical pollutants, needles, sharps, and radioactive substances, which are extremely dangerous. [0003] Incineration technology is the mainstream treatment and disposa...

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): B09B3/00B09B5/00
Inventor 王雷李润东徐杰李彦龙魏砾宏贺业光
Owner 南京希捷环保科技有限公司