CN106423525A - Adjustable nozzle structure of medium-speed coal mill - Google Patents
Adjustable nozzle structure of medium-speed coal mill Download PDFInfo
- Publication number
- CN106423525A CN106423525A CN201611027681.6A CN201611027681A CN106423525A CN 106423525 A CN106423525 A CN 106423525A CN 201611027681 A CN201611027681 A CN 201611027681A CN 106423525 A CN106423525 A CN 106423525A
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- CN
- China
- Prior art keywords
- nozzle
- medium
- tunable arrangement
- coal
- adjustable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention relates to an adjustable nozzle structure of a medium-speed coal mill. The adjustable nozzle structure comprises a rotary nozzle, an upper sealing structure and an adjustable device, wherein the adjustable device is located between the rotary nozzle and the upper sealing structure; the adjustable device is located above an outlet of the rotary nozzle; the upper sealing structure is fixedly connected with a barrel wall; a mechanical transmission part for controlling the adjustable device is arranged outside the barrel wall; and the mechanical transmission part is provided with a crank connecting rod structure and can be used for pushing the adjustable device to retract frontward and backward. By adopting the mechanical transmission part, a flow area of the outlet of the rotary nozzle is controlled in real time and an air speed of the outlet is changed. The rotary nozzle can rotate integrally and has no dynamic and static friction. The adjustable nozzle structure is simple in structure, convenient to mount and convenient to overhaul. The adjustable nozzle structure of the medium-speed coal mill is applicable to changes of fired coal quality, equipment and operating conditions; the capability of screening impurities of raw coal by the nozzle can be improved; and the output of the coal mill is guaranteed and the energy consumption of the coal mill is reduced.
Description
Technical field
The present invention relates to mechanical field, particularly relate to a kind of thermal power plant medium-speed pulverizer adjustable nozzle structure.
Background technology
Currently, used by the medium-speed pulverizer of thermal power plant, rotary spray nozzle ring is mainly made up of rotating ring and stationary ring.Wherein, rotating ring
It is connected with mill, rotate with mill during operation；Stationary ring is connected with coal-grinding barrel wall.Between arranging necessarily between rotating ring and stationary ring
Gap.
Existing subject matter has：
Coal-grinding machine nozzle flow area can not be adapted to the change of institute's coal-grinding kind.For example, when coal pulverizer institute coal-grinding kind is height
During moisture coal, in order to ensure drying capacity it is necessary to increase heat primary air flow area, reduce flowing resistance.And work as and use
During common coal, then flow area necessarily can be throttled, improve jet expansion wind speed, reduce the mesh of wind powder ratio
's.But in current thermal power plant, there is no the technology of On-line Control coal-grinding machine nozzle flow area.
Coal-grinding machine nozzle is poor to pebble coal screenability.Because nozzle flow area is certain, constant in primary air flow
In the case of jet expansion wind speed constant.At present, thermal power plant can only control pebble coal amount by adjusting primary air flow.In addition, working as
During coal varitation, because wind speed is non-adjustable, nozzle does not sieve coal cinder and the ability of impurity (stone, pyrite etc.).For combustion
With the power plant of the more colm of impurity, impurity can not be discharged in time, repeatedly be ground in coal pulverizer, causes coal pulverizer abrasion tight
Weight, power consumption raises.
Additionally, with the increase of run time, coal pulverizer rotating ring is increased with stationary ring abrasion, and coal-grinding machine nozzle is to First air
Organizational capacity weakens, and the powder ability of taking of First air substantially reduces, and pebble coal amount dramatically increases, and affects pulverizer capacity.In addition, mill
The abrasion of roller makes raw coal cannot be fully ground and is arrived stone coal bin by exclusion.Therefore, the control of jet expansion wind speed is to stone
Sub- coal and pulverizer capacity have material impact.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art and providing a kind of medium-speed pulverizer adjustable nozzle structure, with
Adapt to burning coal and equipment, operating condition change, to improve the ability that nozzle screens raw coal impurity, reduce coal pulverizer energy consumption.
The technical scheme is that：
A kind of medium-speed pulverizer adjustable nozzle structure, it includes：Swivel nozzle, upper sealing structure, tunable arrangement, its feature
It is：Described tunable arrangement is located between swivel nozzle and upper sealing structure；And tunable arrangement is located at the outlet of swivel nozzle
Top；Described upper sealing structure is fixedly connected with barrel；It is externally provided with the mechanical transmissioning piece controlling tunable arrangement in barrel；Described
Swivel nozzle can integral-rotation, no sound friction.
It is brace and connecting rod framework in described mechanical transmissioning piece, tunable arrangement can be promoted elastic.By machine driving
Part real-time control swivel nozzle outlet flow area, can change air outlet velocity.Described tunable arrangement is real by mechanical transmissioning piece
Now along the radial motion of swivel nozzle, to reach the real-time purpose changing exit area of nozzle.
For adapting to coal and equipment working condition change, improve coal pulverizer performance, described tunable arrangement passes through mechanical transmissioning piece
Stretch to swivel nozzle side, the 0～40% of original area can be contracted to by real-time adjustment swivel nozzle outlet flow area.By scene
Detection coal pulverizer performance data, swivel nozzle outlet flow area is adjusted to optimal flow area, can reach screening pebble coal,
Ensure pulverizer capacity, the purpose of reduction coal pulverizer power consumption.
Described tunable arrangement is a fender plate structure, and its down suction and swivel nozzle between is 7～10mm；Institute
Down suction between the tunable arrangement stated and upper sealing structure is 2～5mm, to reach sealing effectiveness.
It is an advantage of the current invention that：Present configuration is simple, install convenient, and maintenance is convenient.The present invention is suitable for using coal
Matter and equipment, operating condition change, can improve nozzle and screen the ability of raw coal impurity it is ensured that pulverizer capacity, reduce coal pulverizer
Energy consumption.
Brief description
Fig. 1 is the structure sectional view of the embodiment of the present invention 1.
Drawing reference numeral explanation：
Swivel nozzle 1；Upper sealing structure 2；Tunable arrangement 3；Barrel 4；Mechanical transmissioning piece 5.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is further illustrated.
As shown in figure 1, medium-speed pulverizer adjustable nozzle structure of the present invention, it includes：Swivel nozzle 1, upper sealing structure 2,
Tunable arrangement 3.Wherein, described tunable arrangement 3 is located between swivel nozzle 1 and upper sealing structure 2；And tunable arrangement 3 is located at
Above the outlet of swivel nozzle 1；Described upper sealing structure 2 is fixedly connected with barrel 4.It is externally provided with the adjustable dress of control in barrel 4
Put 3 mechanical transmissioning piece 5.Described swivel nozzle 1 can integral-rotation, no sound friction.
It is brace and connecting rod framework in described mechanical transmissioning piece 5, tunable arrangement 3 can be promoted elastic.Passed by machinery
Moving part 5 real-time control swivel nozzle 1 outlet flow area, can change air outlet velocity.Described tunable arrangement 3 passes through machine driving
Part 5 realizes the radial motion along swivel nozzle 1, to reach the real-time purpose changing nozzle 1 discharge area.
Described tunable arrangement 3 passes through mechanical transmissioning piece 5 and stretches to swivel nozzle 1 side, can real-time adjustment swivel nozzle 1 go out
Mouth flow area is contracted to the 0～40% of original area.By Site Detection coal pulverizer performance data, adjust to most preferably through-flow face
Long-pending, can reach screening pebble coal, the purpose ensureing pulverizer capacity, reducing coal pulverizer power consumption.
Described tunable arrangement 3 is a fender plate structure, and its down suction and swivel nozzle 1 between is 7～10mm；
Down suction between described tunable arrangement 3 and upper sealing structure 2 is 2～5mm, to reach sealing effectiveness.
Above be highly preferred embodiment of the present invention, not in order to limit the present invention, all the spirit and principles in the present invention it
Interior, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of medium-speed pulverizer adjustable nozzle structure, it includes：Swivel nozzle, upper sealing structure, tunable arrangement, its feature exists
In：Described tunable arrangement is located between swivel nozzle and upper sealing structure；And tunable arrangement is located in the outlet of swivel nozzle
Side；Described upper sealing structure is fixedly connected with barrel；It is externally provided with the mechanical transmissioning piece controlling tunable arrangement in barrel；Described
Swivel nozzle can integral-rotation, no sound friction.
2. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：In described mechanical transmissioning piece
It is provided with brace and connecting rod framework, it can promote tunable arrangement elastic.
3. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：Real-time by mechanical transmissioning piece
Control swivel nozzle outlet flow area, change air outlet velocity.
4. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：Described tunable arrangement passes through
Mechanical transmissioning piece realizes the radial motion along swivel nozzle, changes exit area of nozzle with real-time.
5. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：Described tunable arrangement passes through
Mechanical transmissioning piece to swivel nozzle side stretch, can real-time adjustment swivel nozzle outlet flow area be contracted to original area 0～
40%.
6. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：By Site Detection coal pulverizer
Performance data, swivel nozzle outlet flow area is adjusted to optimal flow area, can achieve screening pebble coal, ensures coal pulverizer
Exert oneself, reduce the purpose of coal pulverizer power consumption.
7. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：Described tunable arrangement is one
Fender plate structure, its down suction and swivel nozzle between is 7～10mm, to reach sealing effectiveness.
8. medium-speed pulverizer adjustable nozzle structure according to claim 1 it is characterised in that：Described tunable arrangement with upper
Down suction between sealing structure is 2～5mm, to reach sealing effectiveness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027681.6A CN106423525A (en) | 2016-11-17 | 2016-11-17 | Adjustable nozzle structure of medium-speed coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027681.6A CN106423525A (en) | 2016-11-17 | 2016-11-17 | Adjustable nozzle structure of medium-speed coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106423525A true CN106423525A (en) | 2017-02-22 |
Family
ID=58221881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611027681.6A Pending CN106423525A (en) | 2016-11-17 | 2016-11-17 | Adjustable nozzle structure of medium-speed coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106423525A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113578514A (en) * | 2021-07-23 | 2021-11-02 | 中国电建集团长春发电设备有限公司 | Online monitoring method and system for abrasion condition of grinding part in coal mill |
-
2016
- 2016-11-17 CN CN201611027681.6A patent/CN106423525A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113578514A (en) * | 2021-07-23 | 2021-11-02 | 中国电建集团长春发电设备有限公司 | Online monitoring method and system for abrasion condition of grinding part in coal mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |