System and method of blending combustion of coal type with low ash melting point in coal-fired utility boiler
A coal-fired power station, ash melting point technology, applied in the direction of combustion method, combustion equipment, fuel supply, etc., can solve the problems of not having premixing conditions, affecting the operation stability, and the coal yard of the power plant is too small, so as to avoid coking and ensure Safety, the effect of low furnace temperature
Active Publication Date: 2014-12-03
HUANENG POWER INTERNATIONAL +3
View PDF6 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the premixing in front of the furnace is also limited by the size of the coal yard and the uniformity of blending. Some power
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Example Embodiment
[0029] The present invention will be further described in detail below with reference to the drawings and embodiments.
[0030] Such as figure 1 As shown, the coal-fired power station boiler blending low ash melting point coal type system of the present invention is used to provide low ash melting point coal type. The outlet of the first raw coal bunker 1 is connected to the inlet of the first coal feeder 3, and the first coal feeder 3 The outlet is connected to the first inlet of the double inlet and double outlet steel ball mill 5, and the first outlet of the double inlet and double outlet steel ball mill 5 is connected to the inlet of the first separator 8 through the first powder outlet pipe 6. The first separator The first outlet of 8 is connected to the inlet of the burner in the furnace, and the second outlet of the first separator 8 is connected to the first inlet of the double-inlet and double-outlet steel ball mill 5 through the first powder return pipe 10; The outlet o...
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
| Property | Measurement | Unit |
|---|---|---|
| Melting point | aaaaa | aaaaa |
Login to view more
Abstract
The invention discloses a system and method of blending combustion of a coal type with a low ash melting point in a coal-fired utility boiler and belongs to the technical field of coal-fired utility boiler operation. The coal-fired utility boiler is equipped with a positive-pressure, direct-firing, double-in and double-out steel ball coal pulverizer; the method of blending combustion of coal type with the low ash melting point in the coal-fired utility boiler comprises the following steps: the coal type with the low ash melting point and a coal type with a high ash melting point are sent into the steel ball coal pulverizer from one end of the positive-pressure, direct-firing, double-in and double-out steel ball coal pulverizer respectively; after thorough mixing and grinding, powder is uniformly output from two ends of the steel ball coal pulverizer; after the blending, compared with the melting point of the coal type with a low ash melting point, the melting point of the blended ash is increased to a relatively large extent; under various boiler loading, through adjusting the belt rotational speeds of coal feeders that correspond to the coal type with the low ash melting point and the coal type with the high ash melting point, the mixing proportion control is realized on the coal type with the low ash melting point. The system and method of blending combustion of coal type with the low ash melting point in the coal-fired utility boiler can improve the combustion and utilization proportion of the coal type with the low ash melting point to the utmost extent, on the basis of effectively relieving the boiler from coking and ensuring the safe operation of the boiler; the cost of fuel is reduced; the economical efficiency in the operation of the coal-fired utility boiler machine set is improved.
Description
【Technical field】 [0001] The invention belongs to the technical field of coal-fired power plant boiler operation, and relates to a system and method for blending and burning low-ash melting point coal in a coal-fired power plant boiler. 【Background technique】 [0002] Affected by coal supply channels or the coal market, the coal quality of many large coal-fired power plants is far from the design coal type, including some low-ash melting point coal types with lower standard coal unit prices. The use of coal with low ash melting point will bring different degrees of coking problems to the boiler. Especially with the reduction of nitrogen oxide emission standards for coal-fired power plant boilers, low-nitrogen combustion methods such as air classification and fuel classification will further promote the conversion of mineral elements in coal to compounds with low ash melting points during the combustion process, which will aggravate coking in the furnace. Severe coking of th...
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
Login to view more IPC IPC(8): F23K1/00
Inventor 周科张广才陈国辉周平
Owner HUANENG POWER INTERNATIONAL
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
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