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

Method for recycling and dehydrating hydrocarbon substances in oil sludge dissolved by liquid dimethyl ether

A dimethyl ether, liquid technology, applied in the field of resources and environment, can solve the problems of high toxicity, environmental pollution recovery cost, difficult to effectively guarantee the operation safety, etc., and achieve the effect of high separation efficiency and simple operation

Inactive Publication Date: 2020-10-16
HOHAI UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, most of the extraction agents are organic solvents, which are highly toxic, pollute the environment and have high recycling costs
However, the cost of supercritical fluid extraction is high, and the operation safety is difficult to be effectively guaranteed.

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
  • Method for recycling and dehydrating hydrocarbon substances in oil sludge dissolved by liquid dimethyl ether
  • Method for recycling and dehydrating hydrocarbon substances in oil sludge dissolved by liquid dimethyl ether
  • Method for recycling and dehydrating hydrocarbon substances in oil sludge dissolved by liquid dimethyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a process flow diagram of the present invention. like figure 1 Shown, the method for recovering and dehydrating hydrocarbons in liquid dimethyl ether dissolved oil sludge, the steps are as follows:

[0030] Step 1: Put the oil sludge in the reaction kettle 8, pressurize and liquefy the gas dimethyl ether in the gas tank 1 in the temporary storage tank 5 by the air pump 3 and convert it into a liquid state, and then inject it into the reaction kettle 8 to mix with the oil sludge dissolve. The amount of liquid dimethyl ether is 10-40 times the mass of sludge, the reaction pressure is 0.5-2MPa, the reaction temperature is 20-60°C, the reaction time is 20-40min, the stirring rate is 60rpm-120rpm / min, and the stirring time is 20-40min.

[0031] Step 2: After the liquid dimethyl ether and the oil sludge are fully mixed and reacted, the pressure is reduced by adjusting the pressure reducing valve on the reactor 8, and the product is subjected to solid-liquid ...

Embodiment 2

[0037] A single factor investigation was carried out on the reaction conditions affecting the results, the results are shown in Figure 3-6 shown.

[0038] image 3 It is the effect diagram of mass ratio on water content and oil recovery rate. It can be seen that the mass ratio of liquid dimethyl ether to oil sludge has a great influence on recovery rate and water content after oil sludge treatment. With the increase of mass ratio, oil sludge treatment After the water content drops rapidly, when the mass ratio is 20, it basically tends to be stable. At this time, the water content of the oil sludge is between 10-15%, and the oil recovery rate increases with the increase of the mass ratio.

[0039] Figure 4 is the effect diagram of reaction temperature on water content and oil recovery rate; it can be seen that reaction temperature has a great influence on recovery rate and water content of oil sludge after treatment. When the temperature is 60°C, the moisture content of th...

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 method for recycling and dehydrating hydrocarbon substances in oil sludge dissolved by liquid dimethyl ether. The characteristics that liquid dimethyl ether has high affinity to hydrocarbon components and can be partially mixed and dissolved with water are utilized, gas dimethyl ether is pressurized and liquefied and then mixed with oily sludge, and the extraction and dehydration effects of hydrocarbon substances are promoted by changing the temperature, pressure and stirring speed and adding auxiliaries. After the liquid dimethyl ether is extracted, the liquid dimethyl ether can be quickly separated and recycled from a liquid-phase product in a reduced-pressure gasification manner, and cyclic utilization is realized in a re-pressurization manner. And hydrocarbonsubstances and water in the separated liquid-phase product are immiscible, so that rapid separation can be realized through a separating funnel. The method has the characteristics of low operation cost, easy product separation, energy conservation and environmental protection, provides a new thought for reduction treatment and resource utilization of oily sludge, and has important practical significance.

Description

technical field [0001] The invention belongs to the field of resources and environment, and specifically relates to a method for extracting and dehydrating hydrocarbon substances in oil sludge by utilizing the characteristics that liquid dimethyl ether has high affinity for oily components and is partially miscible with water. Background technique [0002] Oily sludge is one of the most important solid wastes produced in the petroleum industry. It is a composite emulsion composed of various petroleum hydrocarbons (PHCs), water, heavy metals, and solid particles. It has been listed as hazardous waste in my country. Improper disposal can pose a serious threat to the environment and human health. The main sources of oily sludge are: (1) Drilling crude oil development: The oily sludge in crude oil extraction comes from the sludge in the mining process and the oily sludge and decay in the sewage treatment process. (2) Ikeda gathering and transportation: including landed oil sludg...

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): C02F11/00C02F11/147C10G1/04
CPCC02F11/00C10G1/04C10G2300/1003C10G2300/44C02F11/147
Inventor 朱伟牟彪陈乐李卓陈思鹏
Owner HOHAI UNIV
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