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

Oxidation desulfurization method and device for coal in overheated near-critical water

A technology of near-critical superheating and water oxidation, applied in solid fuel, petroleum industry, fuel, etc., to achieve the effects of reducing economic losses, reducing material requirements, and high desulfurization efficiency

Active Publication Date: 2022-01-07
ZHONGBEI UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the organic sulfur and elemental sulfur in coal are difficult to be removed by general coal washing or gravity separation methods. Technical methods and devices

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
  • Oxidation desulfurization method and device for coal in overheated near-critical water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The coal sample is Taiyuan steam coal, with a combustible sulfur content of 1% on a dry, ash-free basis.

[0030] Take 1000g of coal sample, uniformly pulverize the average particle size of about 0.5~1mm, and put it into the reactor 6. The preheater 3 generates high-temperature superheated steam, and the high-temperature superheated steam passes into the reactor to heat the pulverized coal to 420°C. Then the water in the preheater is heated to 480°C through the external heating jacket 4, and the pressure is increased to 10MPa. The superheated and near-critical fluid enters the reactor through the back pressure valve 5, and then the reactor is fed with oxygen to control the overheating. The oxygen coefficient is 1.3. React for 5 minutes, the gas discharged from the gas-liquid separator gas phase outlet in the reaction process is passed in the solvent bottle 1 that sodium hydroxide solution is housed, and the liquid collection flowing into the clean solvent bottle 2 from...

Embodiment 2

[0032] The coal sample is Datong raw coal with a combustible sulfur content of 1.1% on a dry ash-free basis.

[0033] The operation process and method are the same as the implementation example 1. The main parameters differ as follows. Coal sample 800g, uniformly crushed with an average particle size of about 1~2mm. First pass high-temperature superheated steam to heat the pulverized coal to 420°C. The water in the preheater is heated to 480°C, the pressure is maintained at 15MPa, oxygen is introduced into the reactor, the oxygen peroxide coefficient is 1.2, and the reaction is carried out for 4 minutes.

[0034] Sulfate and sulfite ions were not detected in the solution of solvent bottle 1 where the gas phase was collected. Sulfate and sulfite ions were detected in the solvent bottle 2 where the liquid phase solution was collected, and the mass of sulfur in the liquid phase solution was calculated to be about 8g based on the measured values. Analyzing and measuring the pu...

Embodiment 3

[0036] The coal sample is Changzhi anthracite, with a combustible sulfur content of 0.8% on a dry, ash-free basis.

[0037] The operation process and method are the same as the implementation example 1. The main parameters differ as follows. The coal sample is 1300g, and the average particle size of uniform grinding is about 1~2mm. The pulverized coal is heated to 420°C by introducing high-temperature steam. The water in the preheater is heated to 520°C, the pressure is maintained at 20MPa, oxygen is introduced into the reactor, the oxygen peroxide coefficient is 1.5, and the reaction is carried out for 8 minutes.

[0038] Sulfate and sulfite ions were not detected in the solution of solvent bottle 1 where the gas phase was collected. Sulfate and sulfite ions were detected in the solvent bottle 2 where the liquid phase solution was collected, and the mass of sulfur in the liquid phase solution was calculated to be about 9.8 g based on the measured values. Analyze and measu...

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 coal clean utilization technology, belongs to the field of desulfurization before coal combustion in an environmental protection technology, particularly relates to a process and a method for removing sulfur in coal by using overheating near-critical water oxidation. The method is particularly suitable for high-sulfur coal which contains organic sulfur and is difficult to desulfurize by methods such as common washing separation and gravity separation. According to the core scheme, high-temperature and high-pressure superheated steam and an oxidizing agent are used, and sulfur-containing pulverized coal is subjected to desulfurization treatment under the conditions that the working temperature T is 400-600 DEG C and the working pressure P is 10-20 MPa. The scheme provided by the invention can be suitable for desulfurization of various high-sulfur coals before combustion, and sulfur components existing in various forms in the high-sulfur coals can be effectively removed. Compared with a supercritical water oxidation method, the method disclosed by the invention has the advantages that the requirements on materials of the reactor and the preheater can be reduced, the economic loss caused by corrosion of a reaction container due to high pressure is reduced, the safety and the stability of the system are improved, and the method has relatively great technical and economic advantages.

Description

technical field [0001] The invention relates to clean coal utilization technology, which belongs to the field of desulfurization before coal combustion in environmental protection technology, specifically a process and method for oxidizing and removing sulfur in coal by using superheated near-critical water, especially suitable for containing organic sulfur that is difficult to use normally High-sulfur coal desulfurized by washing, gravity separation and other methods. Background technique [0002] Coal is one of the most important fossil fuels, and the energy consumption pattern dominated by coal will basically not change for a period of time in the future, but the traditional flame combustion of coal has brought serious environmental pollution for a long time, especially its combustion Air pollutants such as sulfur dioxide are a great threat to human health and the ecological environment. With the increasingly stringent environmental protection requirements, the emission ...

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): C10L9/06
CPCC10L9/06Y02P20/54
Inventor 赵光明李斌柴涛李娜
Owner ZHONGBEI 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