CN202655103U - Air ring of coal mill - Google Patents
Air ring of coal mill Download PDFInfo
- Publication number
- CN202655103U CN202655103U CN 201220104106 CN201220104106U CN202655103U CN 202655103 U CN202655103 U CN 202655103U CN 201220104106 CN201220104106 CN 201220104106 CN 201220104106 U CN201220104106 U CN 201220104106U CN 202655103 U CN202655103 U CN 202655103U
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- Prior art keywords
- bolt
- vane
- air ring
- coal
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Abstract
The utility model relates to an air ring of a coal mill. The air ring comprises a wear-resisting hoop, a first bolt, air rings, a compression ring section, a third bolt and a fourth bolt, wherein the section of the air ring formed by integrally welding a middle lining plate and a flow guide plate is made into a wing shape, the wear-resisting hoop and each section of air ring are fixed on the compression ring section by the first bolt to form a combined air ring element, and the air ring element is fixed on a coal mill body through the third bolt and the fourth bolt. The novel wing-shaped air ring disclosed by the utility model enables pulverized coal/hot wind mixtures to pass on a whole pulverized coal separator in a uniformly distributing mode, so that the wearing of internal wear-out parts is more consistent, and the control is easier. The novel wing-shaped air ring is operated at a lower speed, so that the wearing life of other blown parts in the air ring component and the separator is prolonged. In addition, the top surfaces of the flow guide plate and the middle lining plate are made into oblique side slopes to prevent the pulverized coal from being accumulated or rejected, so that the coal mill becomes cleaner, and a combustion accident caused by pulverized coal accumulation is not easy to cause.
Description
Technical field
The utility model is a kind of coal pulverizer vane, and particularly a kind of Novel airfoil vane that uses for HP bowl pulverizer bottom belongs to the renovation technique of coal pulverizer vane.
Background technology
In power plant's HP bowl pulverizer coal dust running processed, thereby heat primary air enters the inner coal dust that drives of coal pulverizer by the vane adjustment, thereby need the air pressure of hot blast through vane the time to reach certain pressure, and this pressure of common vane can could produce relatively greatly enough hot air flows, get muddled easily at vane exit wind simultaneously, turbulization, so that blast is to the wearing and tearing increase of coal pulverizer vane, the problem that coal pulverizer vane serious wear often can occur, will cause like this coal pulverizer to leak out, loss of seal, thereby so that the coal dust that originally will upwards blow is larger in the place's loss of leaking out, thus the loss of sealing reduced enter the burner hearth coal dust pressure so that the coal pulverizer Efficiency Decreasing; The powder that leaks out simultaneously can make the mill bowl differential pressure of adjusting lower coal amount unstable, has had a strong impact on system's Operation safety.
The utility model content
The purpose of this utility model is to consider the problems referred to above and a kind of coal pulverizer vane that can prolong the service life of the parts that all the other wind-engagings purge in vane parts and the separator is provided.The utility model is reasonable in design, and is convenient and practical.
The technical solution of the utility model is: coal pulverizer vane of the present utility model, include abrasionproof anchor ear, the first bolt, vane, pressure ring section, the 3rd bolt, the 4th bolt, middle liner plate, deflector, the vane that wherein is welded by middle liner plate and deflector one is made section and is air foil shape, the first bolt is fixed on abrasionproof anchor ear and each section vane becomes a combination vane original paper on the pressure ring section, the vane original paper is bolted on the coal pulverizer body by the 3rd bolt and the 4th.
Above-mentioned vane original paper is bolted on the back-up block of the height that can regulate whole combination vane by the 3rd bolt and the 4th, and back-up block is fixed on the coal pulverizer body.
Above-mentioned vane also is fixed with by the second bolt and hex nut and adjusts version, is equiped with the second pad on the second bolt.
The end face of above-mentioned deflector and middle liner plate is made the inclined side slope, and the vane that middle liner plate and deflector one are welded is made section and is air foil shape.
New aerofoil profile vane of the present utility model passes through coal dust/hot blast mixture evenly distributedly on whole coal dust classifier, thereby so that the wearing and tearing on the inter deterioration spare become more consistent, makes control also easier.Add new aerofoil profile vane and move in lower speed, can guarantee that the wear-out life of the parts that all the other wind-engagings purge in vane parts and the separator obtains extending.In addition, the utility model deflector and middle liner plate end face are made the inclined side slope, prevent that coal dust from gathering or refusing coal, thereby make coal pulverizer become cleaner, and more difficult initiation coal dust gathers pyrophoricity accident.The utility model is that a kind of design is ingenious, function admirable, convenient and practical coal pulverizer vane.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model vane;
Fig. 3 is the wind-guiding situation schematic diagram of vane.
The specific embodiment
Embodiment:
Structural representation of the present utility model as shown in Figure 1, 2, coal pulverizer vane of the present utility model, include abrasionproof anchor ear 1, the first bolt 2, vane 8, pressure ring section 9, the 3rd bolt 11, the 4th bolt 14, middle liner plate 15, deflector 16, the vane 8 that wherein is welded by middle liner plate 15 and deflector 16 one is made section and is air foil shape, the first bolt 2 is fixed on abrasionproof anchor ear 1 and each section vane 8 becomes a combination vane original paper on the pressure ring section 9, the vane original paper is fixed on the coal pulverizer body by the 3rd bolt 11 and the 4th bolt 14.Be equiped with on the first bolt 2 to be equiped with on the 3rd pad 10, the 4th bolt 14 on pad 3, the three bolts 11 and be equiped with the 4th pad 13.
Above-mentioned vane original paper is fixed on the back-up block 12 of the height that can regulate whole combination vane by the 3rd bolt 11 and the 4th bolt 14, and back-up block 12 is fixed on the coal pulverizer body.
Above-mentioned vane 8 also is fixed with to adjust on version 4, the second bolts 7 by the second bolt 7 and hex nut 6 and is equiped with the second pad 5.
The end face of above-mentioned deflector 16 and middle liner plate 15 is made the inclined side slope, and the vane 8 that middle liner plate 15 and deflector 16 one are welded is made section and is air foil shape.
In the present embodiment, the vane 8 that is welded with middle liner plate 15 and deflector 16 one is made section and is held and be air foil shape, by the first bolt 2 abrasionproof anchor ear 1 is fixed on pressure ring section 9 with each section vane 8 and becomes a vane original paper, be fixed on the coal pulverizer body and will encircle original paper by the 3rd bolt 11 and the 4th bolt 14, by the back-up block 12 in the same way opposite effect power of the 3rd bolt 11 with tight upper the 4th bolt 14, regulate the height of whole combination vane; To adjust version 4 with the second bolt 7 is fixed on the vane 8.
In the present embodiment, above-mentioned pressure ring section 9 is forged steel pieces.Above-mentioned vane 8 is 360/400 wear-resisting carbon-steel parts.
The above-mentioned aerofoil profile vane 8 that is comprised of middle liner plate 15 and deflector 16 is adjusted fixed position and the angle of whole vane by the 3rd bolt 11, pressure ring section 9, hex nut 6 and back-up block 12 four directions, thereby adjust air inlet and the installation site of whole vane, reach best adjustment effect, thereby can adapt to better different units.
The structure of the utility model vane as shown in Figure 2, air inlet place at heat primary air passes through this aerofoil profile wearing plate, the air channel is for conversion into a large osculum, so as a result energy is so that less flow just can reach in the exit the needed flow of pulverized coal conveying, smaller inlet flow rate is so that the coal pulverizer vane is more wear-resisting, thereby solved the problem of coal pulverizer vane serious wear; Can make simultaneously coal dust carry wind to flow through equably mill bowl/separator leaf joint, the rate of discharge of aerofoil profile baffle plate increases, and reduces when passing the Pressure Drop of vane, can prevent leak-stopping coal or excessive coal, keeps coal dust to the transporting velocity of coal dust classifier.
The utlity model has following features:
(1) heat primary air enters coal pulverizer inside by vane from bottom to top, because the deflector 16 of vane 8 and the special construction of the aerofoil profile vane that middle liner plate 15 is welded, the wind water conservancy diversion is become the motion mode that can reduce air stream turbulence, thereby realize the inner air quantity of water conservancy diversion coal pulverizer.
The utility model adopts unique aerofoil profile vane assembly and corollary equipment thereof, reduces to leak coal or unit overall wear.The aerofoil profile vane can make the shape of the coal dust in the whole powder process of coal pulverizer zone/hot blast mixing delivery air that great change occurs.The structure of this vane can make coal dust carry wind to flow through equably mill bowl/separator leaf joint.Air velocity by the whole leaf joint of separator maintains minimum requirement, the large osculum of aerofoil profile can be realized that less air pressure just can produce and be sufficient to the inner gas flow that uses of coal pulverizer in anti-leak-stopping coal or excessive coal, still can keep coal dust to the transporting velocity of coal dust classifier.
(2) limit wind type aerofoil profile vane meets pneumatic principle, utilizes efficiently air-flow, thereby has reduced resistance, compares with early stage design, and the pressure drop of air-flow still less.Limit wind aerofoil profile can make leaf joint carry out scene adjustment in the mill bowl.This adjustment provides self-defined adjustment capability.The Pressure Drop that passes vane in minimizing simultaneously.Can provide again enough defeated coal speed to prevent leak-stopping coal or excessive coal.This patent main research is the upgradings of coal pulverizer vane parts, and improved debugging, verifies the effect of its performance boost.
The utility model has solved the problem of medium-speed pulverizer wearing and tearing effectively, improves the coal pulverizer reliability of operation, improves and optimization Power Plant Fuel pulverized coal preparation system.Be the key that guarantees the power plant safety reliability service, further promote energy-conserving and environment-protective, bring good economic benefit and social benefit.For power plant creates indirectly, direct benefit is difficult to estimate especially.The research and development of company and the strength of constructing have externally been showed in the successful implementation of project achievement.By this project implementation, will bring good market efficiency to enterprise, must capture afterwards coal pulverizer maintenance transformation market and take the good opportunity, to advancing development of company, dominate the market, improve project benefits and have far reaching significance.
Claims (4)
1. coal pulverizer vane, it is characterized in that including abrasionproof anchor ear (1), the first bolt (2), vane (8), pressure ring section (9), the 3rd bolt (11), the 4th bolt (14), middle liner plate (15), deflector (16), the vane (8) that wherein is welded by middle liner plate (15) and deflector (16) one is made section and is air foil shape, the first bolt (2) is fixed on abrasionproof anchor ear (1) and each section vane (8) becomes a combination vane original paper on the pressure ring section (9), the vane original paper is fixed on the coal pulverizer body by the 3rd bolt (11) and the 4th bolt (14).
2. coal pulverizer vane according to claim 1, it is characterized in that above-mentioned vane original paper is fixed on the back-up block (12) that can regulate the height of whole combination vane by the 3rd bolt (11) and the 4th bolt (14), back-up block (12) is fixed on the coal pulverizer body.
3. coal pulverizer vane according to claim 1, it is characterized in that above-mentioned vane (8) also is fixed with adjustment version (4) by the second bolt (7) and hex nut (6), is equiped with the second pad (5) on the second bolt (7).
4. coal pulverizer vane according to claim 1, the end face that it is characterized in that above-mentioned deflector (16) and middle liner plate (15) is made the inclined side slope, and the vane (8) that middle liner plate (15) and deflector (16) one are welded is made section and is air foil shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104106 CN202655103U (en) | 2012-03-19 | 2012-03-19 | Air ring of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104106 CN202655103U (en) | 2012-03-19 | 2012-03-19 | Air ring of coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202655103U true CN202655103U (en) | 2013-01-09 |
Family
ID=47450040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220104106 Expired - Fee Related CN202655103U (en) | 2012-03-19 | 2012-03-19 | Air ring of coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202655103U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406191A (en) * | 2013-07-19 | 2013-11-27 | 国家电网公司 | HP type medium-speed coal mill, and method for reducing pebble coal discharge amount of HP type medium-speed coal mill |
| CN103567018A (en) * | 2013-11-12 | 2014-02-12 | 北京新源宝通电力设备有限公司 | Rotating nozzle structure of RP coal mill |
| CN104096630A (en) * | 2013-04-08 | 2014-10-15 | 国家电网公司 | Bottom structure of medium-speed coal mill |
| CN104772207A (en) * | 2015-01-30 | 2015-07-15 | 浙江大学 | Guide apparatus of medium speed coal mill vane throat ring |
-
2012
- 2012-03-19 CN CN 201220104106 patent/CN202655103U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104096630A (en) * | 2013-04-08 | 2014-10-15 | 国家电网公司 | Bottom structure of medium-speed coal mill |
| CN104096630B (en) * | 2013-04-08 | 2016-08-24 | 国家电网公司 | A kind of bottom of medium-speed mill structure |
| CN103406191A (en) * | 2013-07-19 | 2013-11-27 | 国家电网公司 | HP type medium-speed coal mill, and method for reducing pebble coal discharge amount of HP type medium-speed coal mill |
| CN103567018A (en) * | 2013-11-12 | 2014-02-12 | 北京新源宝通电力设备有限公司 | Rotating nozzle structure of RP coal mill |
| CN104772207A (en) * | 2015-01-30 | 2015-07-15 | 浙江大学 | Guide apparatus of medium speed coal mill vane throat ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20170319 |