Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for synchronously treating chromium slag and chlorine-free plastics

A synchronous treatment, chlorine plastic technology, applied in the removal of solid waste, products, educts, etc., can solve the problems of uncontinuous utilization, expensive catalyst, equipment blockage, etc., to achieve harmlessness, improve fuel product quality, save energy effect

Active Publication Date: 2019-05-07
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that, on the one hand, the catalyst is relatively expensive and easily deactivated, so it cannot be used continuously; on the other hand, the plastic cracking products are easy to coke without steam vaporization, causing problems such as equipment blockage

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 method for synchronously treating chromium slag and chlorine-free plastics

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0028] 1. Grind the chromium slag to <2mm, mix it with high-temperature steam and chlorine-free plastic, and then transport it to the head of the rotary electric furnace, and then to the tail of the furnace. Heating by an electric furnace, keeping the temperature of the electric furnace stable at 1000°C, and keeping the material in the electric furnace for 30 minutes. After the furnace tail is discharged, the gas phase energy product is sent to the condensing device, and the chromium slag enters the kiln head of the internal heating rotary kiln, and then is sent to the kiln tail of the internal heating rotary kiln;

[0029] 2. After the energy gas enters the condensing device, it flows in the opposite direction with the cooling water and undergoes indirect heat exchange for dehydration treatment, and then is collected into the gas collection tank for subsequent use;

[0030] 3. Part of the cooling water vapor after heat exchange is sent to the end of the internal heating rotar...

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 method for synchronously treating chromium slag and chlorine-free plastics.The method has the advantages that the plastics are subjected to high-temperature catalytic cracking by the aid of the chromium slag which is hazardous waste and are thoroughly converted into energy gas with a low molecular weight under a steam gasification condition, accordingly, coking can be prevented, and energy products are high in efficiency; hexavalent chromium of the chromium slag is converted into trivalent chromium by the generated energy gas, and the chromium slag is harmless; steam comes from cooling water for cooling the high-temperature chromium slag and high-temperature fuel gas, and accordingly excellent energy-saving effects can be realized.

Description

technical field [0001] The invention relates to a method for synchronously treating chromium slag and chlorine-free plastics. Through steam gasification and chromium slag catalysis, the chlorine-free plastics are cracked and converted into small molecule energy gas. At the same time, the energy gas generated can efficiently reduce the hexavalent chromium in the chromium slag. Background technique [0002] Chromium slag is a by-product emitted during the production of dichromate. Because it contains water-soluble hexavalent chromium, it is extremely toxic. If it is stacked in the open air without treatment, it will cause varying degrees of pollution to groundwater sources, rivers or sea areas, and seriously endanger human health and the growth of animals and plants. [0003] Generally speaking, the current detoxification methods for chromium slag (that is, changing highly toxic hexavalent chromium into trivalent chromium) are divided into two categories: wet detoxification a...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C10B53/07C10B49/16B09B5/00
CPCY02P20/143Y02W30/82
Inventor 张大磊郝志鹏张晶
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com