Method and system for producing clean coal by coupling power generation in a power plant

A power plant, clean technology, applied in steam generation method using heat carrier, lighting and heating equipment, fuel, etc., to achieve the effect of stabilizing furnace temperature, reducing pollutant emission and simplifying production process

Active Publication Date: 2021-04-30
CHNA ENERGY INVESTMENT CORP LTD +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of how to realize the combination of power plant power generation and clean coal production, and how to balance the stable production of the two. It provides a method and system for power plant power generation coupling to produce clean coal, which can realize the use of hot flue gas from power plants. Produce clean coal without affecting the power generation production of the power plant, and can also get coal tar

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 and system for producing clean coal by coupling power generation in a power plant
  • Method and system for producing clean coal by coupling power generation in a power plant
  • Method and system for producing clean coal by coupling power generation in a power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) put 5000Nm 3 / h of the first flue gas (900°C) indirectly heats 4,500kg of raw coal (lignite, with a particle size of 20mm) in the rotary kiln for 45 minutes of coal conversion, and the final conversion temperature is 600°C to obtain the first flue gas, the first pyrolysis gas and converted coal;

[0069] (2) put 5000Nm 3 / h of the second flue gas (900°C) indirectly heats the converted coal in the rotary kiln to remove impurities for 35 minutes. ;

[0070] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0071] (4) After the first and second pyrolysis gases are combined, tar is removed to obtain a tar product; at the same time, coal gas is obtained as return air (temperature 450° C.), which is returned to the burner of the power plant boiler through the induced draft device for power generation; The first and second flue gas are merged into return flue gas (800°C) and sent to the power plant boiler for power generation; the total flow of return a...

Embodiment 2

[0075] (1) Use 6500Nm 3 / h of the first flue gas (1000°C) indirectly heats 4000kg of raw coal (non-caking coal, particle size: 30mm) in the tower moving bed to carry out coal conversion for 30min, and the final conversion temperature is 500°C to obtain the first flue gas, first pyrolysis gas and converted coal;

[0076] (2) Use 3500Nm 3 / h of the second flue gas (1000°C) indirectly heats the converted coal in the rotary kiln to remove impurities for 30 minutes, and the final removal temperature is 700°C to obtain the second flue gas, the second pyrolysis gas and the coal;

[0077] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0078](4) After the first and second pyrolysis gases are combined, tar is removed to obtain tar products; at the same time, coal gas is obtained as return air (temperature 350 ° C) and returned to the burner of the power plant boiler through the induced draft device for power generation; the first Combined with the second flue gas,...

Embodiment 3

[0082] (1) Use 6000Nm 3 / h of the first flue gas (950°C) indirectly heats 5000kg of raw coal (long-flame coal, particle size: 3mm) in the tower-type moving bed, and carries out coal conversion for 40min, and the final conversion temperature is 550°C, and the first flue gas, first pyrolysis gas and converted coal;

[0083] (2) with 4000Nm 3 The first flue gas (9500°C) in the rotary kiln indirectly heats the converted coal in the rotary kiln for 30 minutes of coal removal, and the final removal temperature is 650°C to obtain the second flue gas, the second pyrolysis gas and the removal of impurities coal;

[0084] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0085] (4) After the first and second pyrolysis gases are combined, tar is removed to obtain tar products; at the same time, coal gas is obtained as return air (temperature 400 ° C) and returned to the burner of the power plant boiler through the induced draft device for power generation; the first C...

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
Login to view more

Abstract

The invention relates to the field of power generation coupling of power plants and clean coal production, and discloses a method and system for power generation coupling production of clean coal in power plants. The method comprises: (1) indirectly heating the raw coal with the first flue gas at 800-1200° C. The second flue gas at 800-1200°C of the power plant boiler indirectly heats the converted coal to remove impurities from the coal to obtain the second flue gas, the second pyrolysis gas and the impurity-removed coal; (3) the first pyrolysis gas After merging with the second pyrolysis gas, tar is removed to obtain tar and coal gas; the coal gas is returned to the burner of the power plant boiler in the form of return air, and the first flue gas and the second flue gas are combined into return flue gas and sent to the power plant boiler Used for power generation; (4) dry-cooling the de-miscellaneous coal to obtain clean coal. While realizing the normal power generation and production of the power plant, low-rank raw coal is produced into clean coal.

Description

technical field [0001] The invention relates to the coupling field of power generation and clean coal production in power plants, in particular to a method and system for coupling power generation in power plants to produce clean coal. Background technique [0002] In China's energy consumption structure, coal consumption plays a major role. Among them, coal-fired power generation is the main form of coal consumption. However, due to coal-fired pollutant emissions and the impact of coal prices, coal-fired thermal power plants have experienced operating losses in power generation production in recent years, and the overall load rate of coal-fired power plants is low, which restricts the sustainable development of the power generation industry. [0003] In addition, the flue gas emission produced by the coal burning process is an important cause of smog. In recent years, the Beijing-Tianjin-Hebei region is the region with the most serious air pollution in my country, and 8 o...

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): C10B53/00C10B47/00C10B57/00C10K1/04C10L5/00F22B1/18F23J15/06
Inventor 杜万斗次东辉李君高浩华苌亮麻林张峰孙任晖陈薇
Owner CHNA ENERGY INVESTMENT CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap