High-temperature semicoke grinding system and grinding method

A high-temperature semi-coke and high-temperature technology, which is applied in the field of high-temperature semi-coke grinding systems, can solve the problems of large cooling water consumption, increase semi-coke production costs, and limit material temperature, so as to simplify the production process, improve grinding efficiency, Reduce the effect of intermediate links

Inactive Publication Date: 2017-03-15
北京神雾电力科技有限公司
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned prior art has the following disadvantages: (1) high-temperature semi-coke needs to be cooled before entering the coal mill for grinding, and the original surface heat is not utilized; (2) high-temperature semi-coke needs to consume a large amount of cooling water during the cooling process, Increase the production cost of semi-coke; (3) The system needs to be equipped with a cold coke machine, which increases the complexity and investment of the system; (4) The structural characteristics of the mill limit the material temperature; (5) Due to the structural characteristics of the cylinder, the material temperature It should not be too high, generally limited to below 400°C. If it exceeds the above range, the temperature of the ball mill body and bearings will rise, which will affect the strength of the cylinder and the safe operation of the bearings; (6) Steel balls and liners inside the mill The contact area determines the production efficiency of the mill, and the contact area is limited by the diameter and length of the ball mill. If the production capacity is increased, the length and diameter of the ball mill need to be increased, which will greatly increase the production cost of the mill.

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
  • High-temperature semicoke grinding system and grinding method
  • High-temperature semicoke grinding system and grinding method
  • High-temperature semicoke grinding system and grinding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] This embodiment proposes a high-temperature semi-coke grinding system and grinding method. The lignite is dried and then enters the pyrolysis furnace to generate semi-coke. After the powder enters the pulverized coal boiler for combustion, steam is sent to the steam turbine to generate electricity. The technical data of lignite are shown in Table 1:

[0091] Table 1: Technical data of lignite:

[0092]

[0093] The amount of lignite coal is designed to be 120t / h, and it enters the dryer through the feeder. After drying, the moisture Mt of the lignite is ≤ 10%, and then enters the pyrolysis furnace for pyrolysis.

[0094] Semi-coke is produced after lignite pyrolysis, the output is 65t / h, the semi-coke outlet temperature is 700°C, and the semi-coke parameters are as follows:

[0095] Table 2: High temperature semi-coke parameters

[0096]

[0097] The high-temperature semi-coke and the raw coal in the raw coal bunker enter the coal mill according to the ratio of 2...

Embodiment 2

[0104] This embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as described below. The technical data of lignite are shown in Table 1:

[0105] Table 1: Technical data of lignite:

[0106]

[0107] The amount of lignite coal is designed to be 110t / h, and it enters the dryer through the feeder, and the moisture Mt of the dried lignite is ≤ 10%, and then enters the pyrolysis furnace for pyrolysis.

[0108] Semi-coke is produced after lignite pyrolysis, the output is 60t / h, the semi-coke outlet temperature is 900°C, and the semi-coke parameters are as follows:

[0109] Table 2: High temperature semi-coke parameters

[0110]

[0111] The high-temperature semi-coke and the raw coal in the raw coal bunker enter the coal mill at a ratio of 1:1. The raw coal parameters in the raw coal bunker are as follows:

[0112] Table 3 Basic data of raw coal in raw coal bunker

[0113]

[0114] After entering the c...

Embodiment 3

[0118] This embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as described below. The technical data of lignite are shown in Table 1:

[0119] Table 1: Technical data of lignite:

[0120]

[0121] The amount of lignite coal is designed to be 100t / h, and it enters the dryer through the feeder, and the moisture Mt of the dried lignite is ≤ 10%, and then enters the pyrolysis furnace for pyrolysis.

[0122] Semi-coke is produced after lignite pyrolysis, the output is 60t / h, the semi-coke outlet temperature is 700°C, and the semi-coke parameters are as follows:

[0123] Table 2: High temperature semi-coke parameters

[0124]

[0125] The high-temperature semi-coke and the raw coal in the raw coal bunker enter the coal mill at a ratio of 1:2. The raw coal parameters in the raw coal bunker are as follows:

[0126] Table 3 Basic data of raw coal in raw coal bunker

[0127]

[0128] After entering the 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

No PUM Login to view more

Abstract

The invention discloses a high-temperature semicoke grinding system and a grinding method. The system comprises a pyrolyzing furnace, a high-temperature speed adjustment material feeder, a raw coal bunker, a coal feeder and a pulverizer, wherein the high-temperature speed adjustment material feeder is arranged between the pulverizer and the pyrolyzing furnace; the coal feeder is arranged between the pulverizer and the raw coal bunker; the pulverizer comprises bearings and a barrel body; the bearings are arranged on two sides of the barrel body; the barrel body comprises a material inlet, a material outlet and a shell; the material inlet and the material outlet are respectively located at two ends of the barrel body; the shell is located on the surface layer of the barrel body; a water cooling cavity is arranged in the shell; and the shell further comprises a cooling water inlet and a cooling water outlet. The system solves the problem of grinding at a high-temperature state of high-temperature semicoke; the high-temperature semicoke is ground at high temperature to prepare high-temperature coke powder which can be directly conveyed into a boiler for combustion through pneumatic conveying; and therefore, direct pulverizing, conveying and utilization of the high-temperature semicoke are realized.

Description

technical field [0001] The invention belongs to the technical field of coke powder and coal powder combustion power generation, and in particular relates to a high-temperature semi-coke grinding system and method. Background technique [0002] my country is rich in coal resources, and most of the raw coal is used for direct combustion except for coking and conversion processing. The direct combustion of coal leads to the fact that the oil and gas resources rich in coal have not been fully refined and utilized, and the thermal efficiency of direct combustion is low, which seriously damages the environment. The pyrolysis of coal is to heat coal under an inert atmosphere to produce semi-coke, gas and tar and other products. These products can be used in stages to fully extract oil and gas resources while improving coal, especially lignite and coal. Comprehensive utilization efficiency of long flame coal. [0003] The prior art discloses a power plant semi-coke powder injectio...

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): B02C21/00B02C17/10B02C17/18B02C17/22B02C23/20
CPCB02C21/00B02C17/10B02C17/18B02C17/1815B02C17/22B02C23/20
Inventor 马正民马政峰姜朝兴陈水渺吴道洪
Owner 北京神雾电力科技有限公司
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