CN211799379U - Coal vertical mill dust settling system for drying pulverized coal by using waste gas of kiln head of cement kiln - Google Patents

Coal vertical mill dust settling system for drying pulverized coal by using waste gas of kiln head of cement kiln Download PDF

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Publication number
CN211799379U
CN211799379U CN201922441902.XU CN201922441902U CN211799379U CN 211799379 U CN211799379 U CN 211799379U CN 201922441902 U CN201922441902 U CN 201922441902U CN 211799379 U CN211799379 U CN 211799379U
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coal
dust
pipe
air
vertical mill
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蒋朝晖
刘革平
常占新
王玉忠
魏生军
邓玉明
王进勇
鄢平
程国锋
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Jiugang Group Hongda Construction Materials Co ltd
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Jiugang Group Hongda Building Materials Co Ltd
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Abstract

The utility model discloses an utilize coal vertical mill dust fall system of cement kiln hood waste gas stoving buggy. Firstly, a settling chamber is additionally arranged above an air inlet of a hot-blast pipe of the existing waste heat boiler, hot air is extracted through an outlet pipe which is increased at the top of the settling chamber and enters an air taking pipe, the sectional area of an air taking point is increased, the air speed is reduced, primary dust fall is carried out, and the purpose of reducing the dust content in the hot-blast pipe entering a coal mill is achieved; and then a cyclone dust collector is arranged between the air taking pipe and the coal mill hot air pipe and is used as a main system for reducing clinker flying sand in hot air, clinker fine particles and sparks entering the coal mill hot air pipe are treated again, the dust removal efficiency of the clinker particles in the mill hot air is improved to more than 80%, the problems of open fire and high dust content in coal dust in the coal vertical mill are thoroughly solved, and the operation safety and the coal dust quality of the coal vertical mill are improved.

Description

Coal vertical mill dust settling system for drying pulverized coal by using waste gas of kiln head of cement kiln
Technical Field
The utility model belongs to buggy production facility field relates to a production facility of buggy for cement kiln, in particular to utilize cement kiln hood waste gas to dry coal vertical mill dust fall system of buggy.
Background
At present, in the production process of pulverized coal for a cement kiln, waste gas with a certain temperature at the kiln head is generally introduced into a hot air pipe of a waste heat boiler, and is preheated by the waste heat boiler and then introduced into a coal vertical mill through a coal mill hot air pipe for drying the pulverized coal in the coal mill (figure 2). However, the air taking point of the coal mill hot air pipe is arranged on the waste heat boiler hot air pipe, the air speed is high, the dust concentration is high, the hot air temperature is high, and more high-temperature clinker particles exist, and as no dust settling device exists between the waste heat boiler hot air pipe and the coal mill, the ash content (10-15%) of the coal dust is 4-8% higher than that of the raw coal dust, so that the coal dust quality is influenced; meanwhile, if a large amount of high-temperature clinker particles enter the coal mill, open fire is caused, and safety accidents are caused. Therefore, in order to ensure the safe operation of the coal mill system, the temperature of hot air at the inlet of the coal mill needs to be reduced to be below 200 ℃, but the problems of low yield, high power consumption, high water content of coal dust and poor quality of coal dust of a coal mill table are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defect that above-mentioned prior art exists, provide a coal grinds dust fall system immediately of coal mill that operation is safe, buggy high quality utilizes cement kiln hood waste gas stoving buggy.
The utility model adopts the following technical scheme:
a coal vertical mill dust settling system for drying pulverized coal by using waste gas of a kiln head of a cement kiln comprises a waste heat boiler hot air pipe, a coal mill hot air pipe and a coal vertical mill; the waste heat boiler hot air pipe is provided with a settling chamber, the top of the settling chamber is connected with an inlet of an air taking pipe through an outlet pipe, an outlet of the air taking pipe is connected to a cyclone dust collector, the top of the cyclone dust collector is connected with an inlet of a coal mill hot air pipe, and an outlet of the coal mill hot air pipe is connected to a coal vertical mill.
As the utility model discloses technical scheme's further improvement, the above-mentioned tuber pipe of getting is the arch, and its vertical section inserts in the subsider.
The bottom of the cyclone dust collector is connected with an air locking device, and the air locking device is connected with dust conveying equipment. The air locking device is preferably an air locking blanking device, and the dust conveying equipment is preferably a dust discharging zipper machine.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model adds the settling chamber above the air inlet of the hot-blast pipe of the prior exhaust-heat boiler, the hot air is extracted through the outlet pipe which is increased at the top of the settling chamber and enters the air taking pipe, the sectional area of the air taking point is increased, the air speed is reduced, the dust is reduced for one time, and the purpose of reducing the dust content in the hot-blast pipe of the coal mill is achieved; then a cyclone dust collector is arranged between the air taking pipe and the coal mill hot air pipe, and is used as a main system for reducing clinker flying sand in hot air, clinker fine particles and sparks entering the coal mill hot air pipe are treated again, the dust collection efficiency (more than 80 percent of dust collection efficiency) of the clinker particles in the mill hot air is improved, the problems of naked flame and high dust content in coal dust in the coal vertical mill are thoroughly solved, and the operation safety and the coal dust quality of the coal vertical mill are improved.
2. The utility model discloses a setting is got the tuber pipe and is the arch, and inserts perpendicularly in the subsider, can reach and get wind perpendicularly, increases the purpose of getting tuber pipe vertical height to further reduce the fine ash volume of getting the wind point.
3. The utility model discloses a set up lock wind device in cyclone bottom exit, can guarantee cyclone's dust removal effect, lock wind device bottom sets up dust transportation equipment, plays in time to clear up the coal and grinds the on-the-spot dust of system operation, guarantees on-the-spot clean and operation safety's effect.
Drawings
FIG. 1 is a schematic structural view of a dust settling system of a coal vertical mill of the present invention;
FIG. 2 is a schematic structural diagram of a conventional coal vertical mill system;
reference numerals: 1. a hot air pipe of the waste heat boiler: 1-1, an air inlet, 1-2 and an air outlet; 2. a settling chamber: 2-1, an outlet pipe; 3. taking an air duct; 4. a cyclone dust collector; 5. a coal mill hot air pipe; 6. locking the air and discharging the material; 7. a dust discharge zipper machine; 8. and (5) vertically grinding the coal.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a dust settling system of a coal vertical mill for drying pulverized coal by using waste gas of a kiln head of a cement kiln comprises a waste heat boiler hot air pipe 1, a coal mill hot air pipe 5 and a coal vertical mill 8; wherein, the hot blast pipe 1 of the waste heat boiler is provided with a conical expanded settling chamber 2 with the length of 5.6 meters, the width of 3.6 meters and the height of a vertical section of 5.0 meters, the top of the settling chamber 2 is connected with the inlet of an air taking pipe 3 through an outlet pipe 2-1, the air taking pipe 3 is arched, and the inlet is vertically inserted into the settling chamber 2. The outlet of the air taking pipe 3 is connected to a cyclone dust collector 4, the top of the cyclone dust collector 4 is connected with the inlet of a coal mill hot air pipe 5, the bottom of the cyclone dust collector 4 is connected with an air locking blanking device 6, the air locking blanking device 6 is connected with an ash discharging zipper machine, and the outlet of the coal mill hot air pipe 5 is connected to a coal vertical mill 8.
When the utility model is operated, the waste gas with a certain temperature at the kiln head of the cement kiln is introduced into the hot air pipe 1 of the waste heat boiler from the air inlet 1-1 to exchange heat with the hot air in the hot air pipe 1 of the waste heat boiler, the low-temperature hot air is discharged from the air outlet 1-2, and the high-temperature waste gas enters the settling chamber 2 to perform primary dust fall; high-temperature waste gas after primary dust fall is discharged from an outlet pipe 2-1 of the settling chamber 2, enters a vertical section of the arched air taking pipe 3, enters the cyclone dust collector 4 through an inclined section, and is subjected to secondary dust fall; the dust is unloaded through a wind locking blanking device 6 at the bottom of the cyclone dust collector 4 and is transported to a stacking place or a treatment place through a dust unloading zipper machine 7, and high-temperature waste gas after secondary dust removal enters a coal vertical mill 8 through a coal mill hot air pipe 5 and is used for drying coal dust in the coal vertical mill 8. The coal powder produced by the system has low water content and low ash content, and is beneficial to the calcination operation of the cement kiln.

Claims (5)

1. The utility model provides an utilize coal vertical mill dust fall system of cement kiln hood waste gas stoving buggy, includes exhaust-heat boiler hot-blast main, coal mill hot-blast main and coal vertical mill, its characterized in that: the waste heat boiler hot-blast main is equipped with the settling chamber on, the settling chamber top is passed through the outlet pipe and is met with getting the tuber pipe entry, gets tuber pipe exit linkage to cyclone, and cyclone top meets with coal grinds the hot-blast main entry, and coal grinds the hot-blast main exit linkage to the coal and immediately grinds.
2. The coal vertical mill dust settling system for drying pulverized coal by using waste gas of a kiln head of a cement kiln as claimed in claim 1, characterized in that: the air taking pipe is arched, and the vertical section of the air taking pipe is inserted into the settling chamber.
3. The coal vertical mill dust settling system for drying pulverized coal by using the waste gas of the kiln head of the cement kiln as claimed in claim 1 or 2, which is characterized in that: the bottom of the cyclone dust collector is connected with an air locking device, and the air locking device is connected with dust conveying equipment.
4. The coal vertical mill dust settling system for drying pulverized coal by using the waste gas of the kiln head of the cement kiln as claimed in claim 3, characterized in that: the air locking device is an air locking blanking device.
5. The coal vertical mill dust settling system for drying pulverized coal by using the waste gas of the kiln head of the cement kiln as claimed in claim 3, characterized in that: the dust conveying equipment is a dust discharging zipper machine.
CN201922441902.XU 2019-12-30 2019-12-30 Coal vertical mill dust settling system for drying pulverized coal by using waste gas of kiln head of cement kiln Active CN211799379U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922441902.XU CN211799379U (en) 2019-12-30 2019-12-30 Coal vertical mill dust settling system for drying pulverized coal by using waste gas of kiln head of cement kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922441902.XU CN211799379U (en) 2019-12-30 2019-12-30 Coal vertical mill dust settling system for drying pulverized coal by using waste gas of kiln head of cement kiln

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112432163A (en) * 2020-12-09 2021-03-02 湖南天欣科技股份有限公司 Purified hot air production equipment and method suitable for spray drying of ceramic tiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112432163A (en) * 2020-12-09 2021-03-02 湖南天欣科技股份有限公司 Purified hot air production equipment and method suitable for spray drying of ceramic tiles

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Address after: No. 677 Hongda Road, Jiabei Industrial Park, Jiayuguan City, Gansu Province, 735199

Patentee after: Jiugang Group Hongda Construction Materials Co.,Ltd.

Address before: 735100 Jiabei Industrial Park, Jiayuguan City, Gansu Province

Patentee before: HONGDA BUILDING MATERIAL CO., LTD. OF JIUQUAN IRON & STEEL (Group) Co.,Ltd.

CP03 Change of name, title or address