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

A carbonization and solidification treatment process for hazardous waste

A hazardous waste, solidification treatment technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the limited improvement of internal particle retention capacity, difficult to control the solidification performance of cement solidified body, industrial waste residue Quality and composition are difficult to guarantee and other issues, to achieve the effect of good stability and controllability, high strength, and improved density

Active Publication Date: 2017-08-25
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The degree of improvement of the retention capacity of internal particles is limited: due to the porosity of the cement body, the particles are easy to migrate inside the cement body
[0008] (2) It is difficult to guarantee the quality of the cement solidified body for resource utilization: it is difficult to guarantee the quality and composition of the industrial waste slag mixed in, which makes it difficult to control the curing performance of the new cement solidified body

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
  • A carbonization and solidification treatment process for hazardous waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a hazardous waste carbonization and solidification treatment process includes:

[0040] (1) Pour cement and hazardous waste into steel drums for mixing. After the mixing is completed, perform standard curing. The weight ratio of cement and hazardous waste is 9:1, and the water-cement ratio of cement is 0.37. Standard curing The temperature and humidity conditions are a temperature of 25°C and a humidity of 90%;

[0041] (2), after 28 days of standard maintenance, put the container into the supercritical carbon dioxide circulation equipment, pass in carbon dioxide, close the equipment, set the pressure and temperature in the equipment, set the pressure holding time, and set the inside of the equipment to 7.29mPa; the temperature is 31.26°C, holding time for 4 hours;

[0042] (3) After the pressure keeping is completed, slowly release the pressure, take out the steel drum, and seal the lid to obtain a cement solidified body formed of cement an...

Embodiment 2

[0044] Such as figure 1 As shown, a hazardous waste carbonization and solidification treatment process includes:

[0045] (1) Pour cement and hazardous waste into the barrel for stirring, and then carry out standard curing after the stirring is completed, wherein the weight ratio of cement and hazardous waste is 9:1, the water-cement ratio of cement is 0.37, and the temperature of standard curing Humidity conditions are a temperature of 25°C and a humidity of 95%;

[0046] (2), after 28 days of standard maintenance, put the container into the supercritical carbon dioxide circulation equipment, pass in carbon dioxide, close the equipment, set the pressure and temperature in the equipment, set the pressure holding time, and set the inside of the equipment to 7.29mPa; the temperature is 31.26°C, hold pressure for 10 hours;

[0047] (3) After the pressure keeping is completed, slowly release the pressure, take out the bucket, and seal the lid to obtain a cement solidified body f...

Embodiment 3

[0049] Such as figure 1 As shown, a hazardous waste carbonization and solidification treatment process includes:

[0050] (1) Pour cement and hazardous waste into the barrel for stirring, and carry out standard curing after the stirring is completed. Among them, the weight ratio of cement and hazardous waste is 5:5, the water-cement ratio of cement is 0.4, and the temperature of standard curing The humidity conditions are a temperature of 25°C and a humidity of 92.5%;

[0051] (2), after 28 days of standard maintenance, put the container into the supercritical carbon dioxide circulation equipment, pass in carbon dioxide, close the equipment, set the pressure and temperature in the equipment, set the pressure holding time, and set the inside of the equipment to 7.29mPa; the temperature is 31.26°C, the holding time is 7h;

[0052] (3) After the pressure keeping is completed, slowly release the pressure, take out the bucket, and seal the lid to obtain a cement solidified body f...

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 provides a carbonization and solidification treatment process for hazardous waste, which is characterized in that it includes: (1), injecting cement and hazardous waste into a container for stirring, and performing standard curing after the stirring is completed; (2), standard curing 28d Finally, put the container into the supercritical carbon dioxide circulation equipment, pass in carbon dioxide, close the equipment, set the pressure and temperature in the equipment, and set the pressure holding time; (3) After the pressure holding is completed, slowly release the pressure, take out the container, and seal it. Cover, get cement solidified body formed by cement and hazardous waste. After the carbonization treatment, the density of the cement solidified body is improved, and the cement solidified body will have higher strength and better leaching resistance. With the reduction of internal moisture, the radiation resistance stability of the cement body is also improved. When the performance index of cement solidified body meets the relevant performance requirements of building materials, it can also be used as building materials again.

Description

technical field [0001] The invention belongs to the technical field of cement solidification of hazardous waste, and in particular relates to a carbonization and solidification treatment process of hazardous waste. Background technique [0002] The improvement of the curing performance of the hazardous waste cement solidified body has been widely concerned. The more common types of cement solidified bodies are ordinary Portland cement solidified bodies and cement solidified bodies mixed with different aggregates, such as the prior art CN102201272A and CN1736948A . [0003] Among them, ordinary Portland cement solidified body has mature technology, low cost and good stability, but has poor retention capacity for nuclide and some heavy metals, large volume expansion ratio, and general radiation stability. [0004] The solidified body mixed with dirty acid slag has a good gelling effect, the leaching concentration of heavy metals inside is low, the process is simple, the cost ...

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): C04B28/00C04B18/30C04B40/00
CPCY02W30/91
Inventor 查晓雄王晨王海洋
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL