CN202581372U - Pulverizing system formed by N medium-speed mills and one low-speed mill - Google Patents
Pulverizing system formed by N medium-speed mills and one low-speed mill Download PDFInfo
- Publication number
- CN202581372U CN202581372U CN 201220005731 CN201220005731U CN202581372U CN 202581372 U CN202581372 U CN 202581372U CN 201220005731 CN201220005731 CN 201220005731 CN 201220005731 U CN201220005731 U CN 201220005731U CN 202581372 U CN202581372 U CN 202581372U
- Authority
- CN
- China
- Prior art keywords
- mill
- speed
- coal
- medium
- double
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Crushing And Grinding (AREA)
Abstract
The utility model discloses a pulverizing system formed by N medium-speed mills and one low-speed mill and relates to a direct-firing pulverizing system of burning bituminous coals or meager coals for a thermal power station. The hybrid pulverizing system provided by the utility model adopts the structure that the low-speed mill is connected with an ignition layer burner; and the N medium-speed mills are respectively connected with N layers of burners. Due to the adoption of the pulverizing system, the problem that the minimum power output of a current medium-speed mill is about 25 percent of the maximum power output thereof, which is unfavorable for oil-free ignition of a pulverized coal furnace is solved; and stone coals generated by the N medium-speed mills can be fully eaten off by a double-in and double-out ball mill, which can improve the boiler efficiency by 0.2 percent.
Description
Technical field:
The pulverized coal preparation system that the utility model N platform medium-speed pulverizer adds 1 low speed mill composition relates to the unit pulverized-coal system that uses bituminous coal or meager coal that a kind of thermal power station uses.
Background technology:
The pulverized coal preparation system that uses bituminous coal or meager coal that the thermal power station of prior art uses; When erosive wear index Ke≤5; Usually use N+1 platform medium-speed pulverizer; Guarantee when using design coal that N platform medium-speed pulverizer can be with BMCR load and surplus slightly, use and guarantee when checking coal that N+1 platform medium-speed pulverizer can be with BMCR load and surplus slightly; When erosive wear index Ke＞5, use N platform low speed mill usually, use design coal and check coal and can guarantee that all N platform low speed mill can be with BMCR load and surplus slightly.
The low speed mill comprises low speed coal mill and double-inlet and double-outlet steel ball coal mill; In recent years large and medium-sized coal-fired fired power generating unit is seldom used low speed coal mill, almost all uses double-inlet and double-outlet steel ball coal mill; The powder process energy consumption of double-inlet and double-outlet steel ball coal mill is higher than medium-speed pulverizer; The minimum output of double-inlet and double-outlet steel ball coal mill is unrestricted.
Medium-speed pulverizer comprises Raymond bowl mill, roller type coal pulverizer and ball formula coal pulverizer; What large and medium-sized in recent years coal-fired fired power generating unit use was more is Raymond bowl mill and roller type coal pulverizer; Raymond bowl mill and roller type coal pulverizer in use all can produce the stone coal, and Raymond bowl mill is more more than the roller type coal pulverizer; The minimum output of medium-speed pulverizer is about 25% of its high output.
Summary of the invention:
Technical problem to be solved:
The purpose of the utility model provides a kind of N platform medium-speed pulverizer and adds the pulverized coal preparation system that 1 low speed mill is formed, and the minimum output that solves the prior art medium-speed pulverizer is about 25% of its high output, is unfavorable for the problem of coal-powder boiler non-oil ignition.
Solve the technical scheme that its technical problem adopts:
The utility model N platform medium-speed pulverizer adds pulverized coal preparation system that 1 low speed mill forms and adds 1 low speed mill by N platform medium-speed pulverizer and form hybrid pulverized coal preparation system; The low speed mill is connected with ignition layer burner, and N platform medium-speed pulverizer is connected respectively with N layer burner.
Medium-speed pulverizer comprises Raymond bowl mill, roller type coal pulverizer and ball formula coal pulverizer.
The low speed mill is double-inlet and double-outlet steel ball coal mill.
Double-inlet and double-outlet steel ball coal mill is connected with ignition layer burner; Double-inlet and double-outlet steel ball coal mill can be in 0 to 100% scope meticulous adjusting Coal-fired capacity; If this double-inlet and double-outlet steel ball coal mill is furnished with sound attitude separator, adjusting fineness of pulverized coal easily can also be in operation; Double-inlet and double-outlet steel ball coal mill support point fire bed burner drops into one by one; More than 2 the coal-burning boiler non-oil ignition is of great importance; Can significantly improve the success rate of coal-burning boiler non-oil ignition; Can significantly enlarge the coal scope of application of coal-burning boiler non-oil ignition, improve the burn-off rate of coal dust in the coal-burning boiler non-oil ignition process and make the hydrodynamic force operating mode in the coal-burning boiler non-oil ignition process safer.
A ventilation pressure loss of double-inlet and double-outlet steel ball coal-grinding quite is lower than a ventilation pressure loss of medium-speed pulverizer, and therefore the primary air fan total head has the net pressure head of several kPa according to the medium-speed pulverizer apolegamy in coal-burning boiler non-oil ignition process.
When using design coal, N platform medium-speed pulverizer is enough to guarantee band BMCR load and surplus slightly, and the coal pulverizer station service power consumption rate is identical with employing N+1 platform medium-speed pulverizer; Use when checking coal; N platform medium-speed pulverizer adds 1 double-inlet and double-outlet steel ball coal mill and is enough to guarantee band BMCR load and surplus slightly, and the coal pulverizer station service power consumption rate only slightly increases, but notices that this double-inlet and double-outlet steel ball mill can all eat up the stone coal that N platform medium-speed pulverizer produces; Can improve boiler efficiency 0.2% approximately; Integrate, the net coal consumption rate of this coal fired power generation unit descends, and energy-saving effect is arranged.
The beneficial effect of the utility model:
Can be in 0 to 100% scope the Coal-fired capacity of meticulous point of adjustment fire bed burner;
Blast has the net pressure head of several kPa in coal-burning boiler non-oil ignition process, for Brown Gas igniting or natural gas fired have been created a good blast condition;
When using design coal, N platform medium-speed pulverizer is enough to guarantee band BMCR load and surplus slightly, and the coal pulverizer station service power consumption rate is identical with employing N+1 platform medium-speed pulverizer;
The double-inlet and double-outlet steel ball mill can all be eaten up the stone coal that N platform medium-speed pulverizer produces, and can improve boiler efficiency 0.2% approximately;
During running on the lower load, the double-inlet and double-outlet steel ball mill can provide thinner coal dust, and a higher wind-warm syndrome helps flameholding;
When ature of coal deterioration fugitive constituent descended, the double-inlet and double-outlet steel ball mill can provide thinner coal dust, and a higher wind-warm syndrome helps flameholding, improves boiler operating efficiency.
Description of drawings:
Fig. 1 adds the structure chart of the pulverized coal preparation system of 1 low speed mill composition for N platform medium-speed pulverizer.
Reference numeral in Fig. 1:
1 medium-speed pulverizer, 2 low speed mill.
Be reduced graph 1, in Fig. 1, omit whole air channel, hot-flow flue and burners.
The specific embodiment:
Below use bituminous coal with a 600MW station boiler be example, further specify the utility model N platform medium-speed pulverizer in conjunction with Fig. 1 and add the pulverized coal preparation system that 1 low speed mill is formed.
The optimal way of utility model:
The utility model N platform medium-speed pulverizer adds pulverized coal preparation system that 1 low speed mill forms and adds 1 double-inlet and double-outlet steel ball mill by the wheeled coal pulverizer of 5 bench rollers and form hybrid pulverized coal preparation system; The double-inlet and double-outlet steel ball mill is connected with ignition layer burner, and the wheeled coal pulverizer of 5 bench rollers is connected respectively with 5 layers of burner.
The station boiler that this 600MW uses the high volatile meager coal is a front-back wall opposed firing mode, the front-back wall burner that respectively haves three layers, and back wall lower floor burner is ignition layer burner.
Medium-speed pulverizer and low speed mill are the direct-firing system of malleation, shared 2 seal fans.
The side coal bunker arranges that the double-inlet and double-outlet steel ball mill is arranged in far-end, and gets slightly high primary air velocity.
Claims (3)
1. a N platform medium-speed pulverizer adds the pulverized coal preparation system that 1 low speed mill is formed, and it is characterized in that: add 1 low speed mill by N platform medium-speed pulverizer and form hybrid pulverized coal preparation system; The low speed mill is connected with ignition layer burner, and N platform medium-speed pulverizer is connected respectively with N layer burner.
2. N platform medium-speed pulverizer according to claim 1 adds the pulverized coal preparation system that 1 low speed mill is formed, and it is characterized in that described medium-speed pulverizer comprises Raymond bowl mill, roller type coal pulverizer and ball formula coal pulverizer.
3. N platform medium-speed pulverizer according to claim 1 adds the pulverized coal preparation system that 1 low speed mill is formed, and it is characterized in that described low speed mill is double-inlet and double-outlet steel ball coal mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220005731 CN202581372U (en) | 2012-01-09 | 2012-01-09 | Pulverizing system formed by N medium-speed mills and one low-speed mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220005731 CN202581372U (en) | 2012-01-09 | 2012-01-09 | Pulverizing system formed by N medium-speed mills and one low-speed mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202581372U true CN202581372U (en) | 2012-12-05 |
Family
ID=47250778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220005731 Expired - Fee Related CN202581372U (en) | 2012-01-09 | 2012-01-09 | Pulverizing system formed by N medium-speed mills and one low-speed mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202581372U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175215A (en) * | 2013-04-09 | 2013-06-26 | 章礼道 | Coal-fired boiler natural gas ignition system with low speed grind |
-
2012
- 2012-01-09 CN CN 201220005731 patent/CN202581372U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175215A (en) * | 2013-04-09 | 2013-06-26 | 章礼道 | Coal-fired boiler natural gas ignition system with low speed grind |
| CN103175215B (en) * | 2013-04-09 | 2015-11-25 | 章礼道 | Is furnished with the natural gas ignition system for coal burning boiler in generating plant of a low speed mill |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202056864U (en) | W-shaped flame boiler | |
| CN208475369U (en) | Coal-burning boiler pulverized coal preparation system | |
| CN202032602U (en) | Lignite roller flue gas pre-drying power generation integrated system | |
| CN103672883A (en) | Grid type swirl burner | |
| CN203258673U (en) | Cross-coal type separate grinding blending combustion device of W-shaped flame boiler | |
| CN202141041U (en) | Intermediate storage-type coal pulverizing system pulverized coal boiler and tertiary air distribution structure thereof | |
| CN202581372U (en) | Pulverizing system formed by N medium-speed mills and one low-speed mill | |
| CN203508109U (en) | Millstone tile used on medium speed coal mill | |
| CN102226519B (en) | Control method of combustion device of multifunction tangential firing pulverized coal boiler | |
| CN201748414U (en) | Direct blowing type coal dust boiler anti-explosive treatment system | |
| CN201944836U (en) | Stable-combusting environment-friendly direct current pulverized coal burner | |
| CN203478300U (en) | Industrial pulverized coal boiler island | |
| CN202132967U (en) | Direct blowing power making system of smoke pre-drying lignite steel ball mill | |
| CN202056867U (en) | Combustion device of multifunctional tangentially fired pulverized coal boiler | |
| CN203431913U (en) | Over-firing air distribution device of coal-fired boiler | |
| CN206222303U (en) | A kind of ultralow NOX combustion systems of coal-burning boiler | |
| CN204923045U (en) | Use boiler unit pulverized -coal system of low -volatite coal kind | |
| CN205245155U (en) | Special rotatory ejection of compact return bend of ebullated bed biomass pellet boilers | |
| CN201041356Y (en) | Coal powder and gas dual-purpose boiler | |
| CN203671632U (en) | Energy-saving fan powder returning device | |
| CN102384468A (en) | Separating over-fired air (SOFA) brown coal combustor and combustion method | |
| CN202382263U (en) | Composite coal pulverizing system | |
| CN202082919U (en) | Positive pressure impact pulverized coal burner | |
| CN203628644U (en) | Grid type turbulent burner | |
| CN202484988U (en) | Sandwiched air burner of boiler burning brown coal |
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 |
Granted publication date: 20121205 Termination date: 20180109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |