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

Method for calculating grinding output of ZGM type medium-speed coal mill

A calculation method and coal pulverizer technology, applied in calculation, instrumentation, electrical digital data processing, etc., can solve problems such as high concentration of NOx, aggravated slagging in the furnace if the coal powder is too coarse, and the grinding output cannot reach the design value. To achieve the effect of reducing the concentration of NOx and alleviating the slagging of the furnace and boiler

Active Publication Date: 2019-12-20
XIAN THERMAL POWER RES INST CO LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009]The actual operation test results of the medium-difficult-to-grind coal on this type of coal pulverizer show that the actual grinding output of this type of coal pulverizer is far below the design value, causing the unit There are many problems such as difficulty in carrying load, aggravated slagging in the furnace when the pulverized coal is too coarse, high concentration of NOx formation, and difficulty in combustion adjustment.

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 calculating grinding output of ZGM type medium-speed coal mill
  • Method for calculating grinding output of ZGM type medium-speed coal mill
  • Method for calculating grinding output of ZGM type medium-speed coal mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Calculation of the grinding output of the ZGM-123-N-I coal mill for Yulin coal blending.

[0043] Step 1: Provided by the owner to calculate the basic coal quality parameters of the coal sample: received basic moisture M t (%), received base ash A ar (%) and Hastelloy Grindability Index HGI, at the same time determine the coal fineness R that needs to be ground 90 (%).

[0044] This time Yulin mixed coal: M t = 12.5%, A ar = 12.00%, HGI = 56, R 90 = 20%;

[0045] The second step: Calculate the grinding output B of the ZGM medium-speed coal mill according to the power industry standard "Design and Calculation Design Specifications for Coal Milling System in Thermal Power Plants" (DL / T5145-2012) M . The calculation method of the ZGM medium-speed coal mill is the same as that of the MPS coal mill, except that the ZGMG coal mill needs to modify the coefficient.

[0046] The calculation method of ZGMN and ZGMK coal mills is as follows:

[0047] B M =B M...

Embodiment 2

[0068] Example 2: Calculation of the grinding output of the ZGM-113-K-I coal mill for Yulin coal blending.

[0069] Step 1: Provided by the owner to calculate the basic coal quality parameters of the coal sample: received basic moisture M t (%), received base ash A ar (%) and Hastelloy Grindability Index HGI, at the same time determine the coal fineness R that needs to be ground 90 (%).

[0070] This time Yulin mixed coal: M t = 12.5%, A ar = 12.00%, HGI = 56, R 90 = 20%;

[0071] The second step: Calculate the grinding output B of the ZGM medium-speed coal mill according to the power industry standard "Design and Calculation Design Specifications for Coal Milling System in Thermal Power Plants" (DL / T5145-2012) M . The calculation method of the ZGM medium-speed coal mill is the same as that of the MPS coal mill, except that the ZGMG coal mill needs to modify the coefficient.

[0072] The calculation method of ZGMN and ZGMK coal mills is as follows:

[0073] B M =B M...

Embodiment 3

[0094] Example 3: Calculation of the grinding output of the ZGM-123-G-I coal mill for Yulin coal blending.

[0095] Step 1: Provided by the owner to calculate the basic coal quality parameters of the coal sample: received basic moisture M t (%), received base ash A ar (%) and Hastelloy Grindability Index HGI, at the same time determine the coal fineness R that needs to be ground 90 (%).

[0096] This time Yulin mixed coal: M t = 12.5%, A ar = 12.00%, HGI = 56, R 90 = 20%;

[0097] The second step: Calculate the grinding output B of the ZGM medium-speed coal mill according to the power industry standard "Design and Calculation Design Specifications for Coal Milling System in Thermal Power Plants" (DL / T5145-2012) M . The calculation method of the ZGM medium-speed coal mill is the same as that of the MPS coal mill, except that the ZGMG coal mill needs to modify the coefficient.

[0098] The calculation method of ZGMG coal mill is as follows:

[0099] B M =B MO × f H ×...

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 discloses a method for calculating the grinding output of a ZGM type medium-speed coal mill, which comprises the following steps of: 1, providing basic coal quality parameters for calculating a coal sample: received basis total moisture Mt, received basis ash Aar and a Hardgrove grindability index HGI, and simultaneously determining the fineness R90 of pulverized coal to be ground; 2, calculating the grinding output BM of the ZGM type medium-speed coal mill according to the power industry standard, namely the design specification DL / T 5145-2012 of a coal pulverizing system of a thermal power plant; 3, calculating the final grinding output BMX of the ZGM type medium-speed coal mill. The method is suitable for medium-hard grinding (HGI) power coal, including bituminous coal, meager coal and anthracite, and can be used for coal mill model selection of a newly-built power plant and coal mill transformation of a built power plant. By means of the calculation method, the on-load capacity of the coal mill can be improved, the fineness of pulverized coal has large adjustment allowance, and the problems of hearth slagging, pollutant NOx generation concentration reduction and the like can be solved through pulverized coal fineness adjustment.

Description

technical field [0001] The invention relates to the technical field of coal mill grinding output, in particular to a method for calculating the grinding output of a ZGM type medium-speed coal mill, which is suitable for medium-hard grinding (HGI<70) power coal, including bituminous coal, lean coal, Anthracite can be used for the selection of coal mills for new power plants and the transformation of coal mills for existing power plants. Background technique [0002] The output of the coal mill is one of the important technical indicators for selecting the coal mill model in the project, and it is also one of the main technical indicators for evaluating the technical performance of the coal mill. The output of the coal mill usually includes grinding output, ventilation output and drying output, and the final output of the coal mill depends on the smallest output of the above three. [0003] ZGM-type and MPS-type medium-speed coal mills have the same technical source, both ...

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 Applications(China)
IPC IPC(8): G06F17/50B02C15/00B02C23/00
CPCB02C15/00B02C23/00
Inventor 刘家利屠竞毅方顺利姚伟
Owner XIAN THERMAL POWER RES INST CO LTD
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