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

New process for preparing high-purity carbon dioxide by sludge incineration

A high-purity carbon dioxide and sludge incineration technology, which is applied in the field of environmental science, can solve problems such as gas recycling and utilization, and achieve the effects of alleviating gradual scarcity, reducing hazards, and improving combustion completeness

Inactive Publication Date: 2010-01-06
ZHONGKAI UNIV OF AGRI & ENG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing incineration technologies at home and abroad only consider the recovery of heat (such as power generation) and the reuse of solid waste (such as bricks, cement, etc.), without considering the large amount of CO emitted. 2 Gas recycling

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Using the device of the present invention, a certain amount of sludge from a molasses sewage treatment plant is put into a pure oxygen combustion device, a series of devices such as pure oxygen are started, and after the temperature is raised to a certain temperature, the flue gas is detected online, and the carbon dioxide content in the flue gas is 91.04%. h 2 The S content is 0%, and the nC4, iC4, C4ene, iC5, nC5, C6, C7 and other contents are all 0%. After the combustion is stable, the continuous feeding (sludge) can be carried out, and the ash and slag can be continuously discharged. The ash can be used for brick making and other purposes.

Embodiment 2

[0015] Using the device of the present invention, a certain amount of sludge from a municipal sewage treatment plant is put into a pure oxygen combustion device, a series of devices such as pure oxygen are started, and after the temperature is raised to a certain temperature, the flue gas is detected online, and the carbon dioxide content in the flue gas is 90.04%. The content of H2S is 0%, and the content of nC4, iC4, C4ene, iC5, nC5, C6, C7, etc. are all 0%. After the combustion is stable, the continuous feeding (sludge) can be carried out, and the ash and slag can be continuously discharged. The ash can be used for brick making and other purposes.

[0016] According to the process conditions, every ton of dry sludge (with a moisture content of 26.9%) can be incinerated to obtain 0.298t of carbon dioxide gas, 0.47t of solid residue, and consume 0.271t of oxygen. Calculated based on the annual treatment of 500,000 tons of sludge, O2 consumption is 135,500 tons, with a total ...

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 belongs to the technical field of environmental science and discloses a new process for preparing high-purity carbon dioxide by sludge incineration and a comprehensive-utilization processing method thereof. A pure oxygen sludge incineration device developed by the invention leads sludge to be incinerated in the self-developed pure oxygen sludge incineration device by adopting pure oxygen, so as to lead the concentration of carbon dioxide in flue gas to reach more than 90 percent and be convenient for recycling. The recycled carbon dioxide is separated and purified, and the product is in accordance with the requirements of commercial liquid carbon dioxide standard and can be used for welding, plant air fertilizer, oil extraction, fire-fighting extinguishment, oil removal and derusting, chemical raw materials and the like. The residual after being incinerated can be used for preparing bricks and the comprehensive utilization thereof. The process can lead the sludge to be reduced, harmless and recycled, is in accordance with the direction of recycling economy development, and has good application prospect and remarkable social and environmental benefits.

Description

Technical field: [0001] The invention belongs to the field of environmental science and technology, in particular to sludge incineration to prepare high-purity carbon dioxide and its comprehensive utilization. Background technique: [0002] A large amount of sludge will be produced in the process of wastewater treatment, which contains a large amount of organic matter, microorganisms, metal elements, etc., and direct discharge into the environment will cause serious secondary pollution, which must be reduced, harmless, and resource The 'three modernizations' of modernization. At present, the main methods of sludge treatment are sanitary landfill, drying and heat treatment, ocean dumping, composting, and sludge incineration. Sanitary landfill consumes a large amount of land resources and produces a large amount of leachate. The waste gas produced not only pollutes the environment, but also poses safety hazards. The drying treatment of sludge consumes a lot of energy, result...

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 Applications(China)
IPC IPC(8): C01B31/20F23G7/00C01B32/50
Inventor 崔英德胡文斌吴国杰陈循军尹国强廖列文贾振宇冯光炷黎新明
Owner ZHONGKAI UNIV OF AGRI & ENG