Method for inhibiting volatilization of organic matters in low-temperature burning process of polluted soil by utilizing diatomite
A technology of low temperature incineration and diatomite, which is applied in the field of contaminated soil treatment to achieve the effects of avoiding damage, lowering treatment costs and reducing the risk of environmental pollution
Inactive Publication Date: 2014-01-08
BEIJING UNIV OF TECH +1
View PDF6 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, the application of the adsorption properties of diatomite is mainly reflected in the purification of organically polluted wastewater and the solidification of heavy metal-contaminated soil. There is no report on the patent of using the adsorption principle of diatomite to inhibit the volatilization of organic substances in polluted soil.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.
[0025] The idea of the present invention is to add diatomite with adsorption properties to the organic polluted soil to suppress or delay the volatilization of polycyclic aromatic hydrocarbons in the polluted soil at low temperature (close to the temperature of cement raw material grinding), so as to make it as little as possible Volatilize or delay to the high temperature stage to volatilize again, so that the organic contaminated soil can be used as cement raw material to participate in the ingredients in the low-temperature grinding stage, and prevent the secondary pollution caused by the volatilization of organic matter in the low-temperature grinding stage. Even if the organic matter volatilizes in the closed negative pressure cement kiln after delaying to high temperature c...
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
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
| Boiling point | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the technical field of polluted soil treatment and relates to a method for inhibiting volatilization of organic matters in the low-temperature burning process of polluted soil by utilizing diatomite. The method comprises the following steps: sieving the polluted soil to remove branches, stones and large asphalt, so that the particle diameter of the polluted soil is less than or equal to 16 mm; drying the sieved polluted soil and the diatomite at 105 DEG C for 24 hours respectively; directly adding the diatomite into the polluted soil, and stirring and mixing uniformly, wherein the weight ratio of the diatomite to the polluted soil is 1:(1-5); and heating the mixture of the diatomite and the polluted soil at the temperature section of between 25 and 400 DEG C for 10 to 60 minutes so as to inhibit or delay volatilization of the organic matters in the low-temperature heating process of the polluted soil. The method is simple in process, wide in source of adsorbing materials and low in treatment cost; volatilization of the polycyclic aromatic hydrocarbon organic matters of the polluted soil can be effectively inhibited by completely utilizing heat stability and strong adsorbability of the diatomite; the disposal practicability of the polluted soil, instead of a cement raw material, in a grinding stage is improved, and good economic and social benefits are achieved.
Description
technical field [0001] The invention belongs to the technical field of contaminated soil treatment, and in particular relates to a method for using diatomite to suppress the volatilization of organic matter during low-temperature burning of contaminated soil. Background technique [0002] With the development of modern industrial and agricultural technology, various chemical reagents are used in large quantities, which inevitably leads to the pollution of a large amount of soil by organic substances. Bad influence. In particular, persistent organic pollutants such as polycyclic aromatic hydrocarbons, due to their persistence, long-distance migration, bioaccumulation and high toxicity, cause soil pollution problems to be solved urgently. [0003] At present, in the disposal technology of organic contaminated soil, it is an economical and effective technology to use cement kiln to dispose of organic contaminated soil, especially to use contaminated soil to replace cement raw ...
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
Login to View More IPC IPC(8): B09C1/00
Inventor 毛倩瑾王卉田巍崔素萍姜雨生王亚丽兰明章刘佳张良静
Owner BEIJING UNIV OF TECH