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

Method for continuous conversion of low-rank coal in subcritical water or supercritical water

A technology for supercritical water and low-rank coal, which is used in the preparation of liquid hydrocarbon mixtures, petroleum industry, solid solvent extraction, etc., to achieve the effects of fast reaction speed, simple process and short residence time

Inactive Publication Date: 2005-09-21
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent emphasizes organic solid substances such as biomass, and only reports sodium carboxymethylcellulose (CMC) as an additive, using glucose solution (0.1-0.8M), glucose solution+alkaline additives, low-concentration sawdust+CMC (sawdust concentration 2.0wt%, CMC1wt%) example, the whole patent does not involve the organic solid matter of coal

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 continuous conversion of low-rank coal in subcritical water or supercritical water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The Xiaolongtan lignite with a water content of 14.8% is pulverized to 74 microns and mixed with water to form a 24.8wt% coal-water slurry and placed in the storage tank 2 . When the experiment started, the inlet valve 15 of the boiling coal slurry pump 4, the power switch of the boiling coal slurry pump 4, started the coal water slurry pump 4, and adjusted the flow rate to 4.5 kg / hour, and the coal water slurry was boosted to 24.5MPa; open the inlet valve 14 of the water pump 3, close the system outlet valve 8, start the water pump 3, adjust the flow rate of the water pump to 6.0 kg / hour, the water is boosted to 24.5MPa by the water pump 3, and preheated to 520 by the water preheater 5 ℃. The weight ratio of water to coal is about 9:1. After the temperature and pressure of each point in the system are stabilized, when the outlet pressure of the coal-water slurry pump is balanced with the system pressure of 24.5MPa, the outlet valve 16 of the boiling coal-water slurry ...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a process for preparing coal water slurry or the mixture of coal water slurry with alkaline metal and / or alkaline earth oxides or hydroxides by the method of low level coal continuous transformation in subcritical or supercritical water which comprises, conducting continuous high pressure conveying of coal water slurry, charging into reaction system, usting the peculiarity of the hypercritical water to extracting and pyrolising low grade coal, converting it into useful product in gas, liquid and solid forms.

Description

Technical field: [0001] The invention belongs to a method for converting low-rank coal, in particular to a method for continuously converting low-rank coal into liquid fuel, high calorific value gas and active semi-coke under sub- and supercritical water conditions. Background technique: [0002] Low-rank coals are coals with relatively low degrees of peatization and coalification during coal formation. Among the low-rank coals, lignite is a type of coal with a calorific value of 3500-4000 kcal / kg, no caking, high volatile content and high moisture content. China's lignite reserves amount to 126 billion tons, accounting for 14% of the country's total coal reserves. Peat is a combustible organic mineral composed of water, minerals and organic matter, with a large water content. China's total reserves of peat resources amount to 4.7 billion tons, which is an important potential energy source. Lignite and peat are not suitable for long-distance transportation due to their hi...

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): B01D11/02C10G1/00C10G1/04
Inventor 毕继诚孙东凯程东明张荣赵玉龙
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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