CN203082908U - Energy conservation optimization system of direct-blow-type double-inlet and double-outlet steel ball mill - Google Patents
Energy conservation optimization system of direct-blow-type double-inlet and double-outlet steel ball mill Download PDFInfo
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- CN203082908U CN203082908U CN2013200466178U CN201320046617U CN203082908U CN 203082908 U CN203082908 U CN 203082908U CN 2013200466178 U CN2013200466178 U CN 2013200466178U CN 201320046617 U CN201320046617 U CN 201320046617U CN 203082908 U CN203082908 U CN 203082908U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to an energy conservation optimization system of a direct-blow-type double-inlet and double-outlet steel ball mill. The energy conservation optimization system of the direct-blow-type double-inlet and double-outlet steel ball mill comprises a direct-blow-type double-inlet and double-outlet steel ball coal mill, a primary air system and a boiler master control system. The primary air system is mainly composed of a primary air fan which is provided movable vanes, an air preheater, a control damper, an air pipe and the like. In an ordinary state, the control damper of capacity air is adjusted to a full open state in a manual mode. In lifting load, opening of the control damper of the capacity air can be adjusted in a manual mode. The pressure of a main pipe of the control damper of the capacity air is not adjusted by the primary air fan. The frequency of a frequency changer of the primary air fan or opening of the movable vanes is directly controlled by the boiler master control system to adjust air quantity which enters a hearth. According to the energy conservation optimization system of the direct-blow-type double-inlet and double-outlet steel ball mill, the control damper of the capacity air is completely opened, the appropriate pressure of the main pipe of the primary air fan can be directly calculated by the boiler master control system according to the needed quantity of powder which enters the hearth, namely, the boiler master control system directly acts on output of the primary air fan, throttling loss of the control damper of the capacity air is greatly reduced, response time is short, and then adjustment quality of a unit can be improved.
Description
Technical field
The utility model relates to a kind of straight-blowing double-inlet and double-outlet steel ball and grinds the energy saving optimizing system.
Background technology
There is individual pulverized coal preparation system in the thermal power plant, purpose is that coal dust is sent into boiler furnace, pulverized coal preparation system has middle storage formula (to be about to coal and to wear into powder, be stored in coal bunker earlier, send into burner hearth then), direct-firing (coal is worn into powder simultaneously coal dust is sent into burner hearth) different type, because it is bigger that middle storage formula is taken up an area of, that uses at present is fewer, and direct-firing a large amount of uses because floor space is little, it is direct-firing because the difference of powder process mode is divided into middling speed bowl mill, middling speed Vertical Mill and steel ball mill, because it is wide that the steel ball mill adapts to coal, can be suitable for various coal, and do not have stone coal measures system to use in a large number in the poor power plant of ature of coal, for example Chinese utility model patent CN1872419 discloses a kind of straight-blowing double-inlet and double-outlet steel ball coal mill.
In addition, China utility model patent CN101334666 discloses a kind of straight-blowing double-inlet and double-outlet steel ball coal mill straight blowing type milling system optimized control method, this straight-blowing double-inlet and double-outlet steel ball mill still adopts traditional coordination control strategy, main control strategy is the outlet temperature (being the temperature of wind powder mixture) of total cold damper control mill, damper of total heat is manual control, is generally standard-sized sheet.Primary air fan configuration frequency converter frequency or movable vane aperture are regulated, the capacity wind damper of mill is regulated the into powder amount of burner hearth, and primary air fan is no matter be the pressure that female pipe is all regulated in movable vane or frequency conversion, when load up, capacity wind damper is opened greatly, and main-piping pressure reduces, exerting oneself of primary air fan becomes big, then opposite during load down, so capacity wind damper can not standard-sized sheet, restriction loss is very big.
The utility model content
The utility model makes improvements at the problem that above-mentioned prior art exists, and promptly the technical problems to be solved in the utility model provides few and response time of a kind of restriction loss straight-blowing double-inlet and double-outlet steel ball mill energy saving optimizing system faster.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of straight-blowing double-inlet and double-outlet steel ball grinds the energy saving optimizing system, comprise straight-blowing double-inlet and double-outlet steel ball coal mill, primary air system and boiler master system, described primary air system is mainly by the primary air fan that contains movable vane, air preheater, damper, compositions such as airduct, it is characterized in that: a wind of described primary air fan output elevated pressures, become heat primary air after one tunnel process heat exchange of air preheater of a wind, another road of a wind is a cold wind without air preheater, described heat primary air, a cold wind is respectively through the female pipe of heat primary air, a cold wind airduct confluxes to the female pipe of wind, the female pipe of a described wind was divided into before a wind enters straight-blowing double-inlet and double-outlet steel ball coal mill into mill airduct and bypass airduct, the female pipe of described heat primary air is provided with damper of total heat, the female pipe of a described cold wind is provided with a total cold damper, but describedly go into to grind airduct and be provided with under manual adjustments and the normality the manually capacity wind damper of standard-sized sheet, described bypass airduct is provided with bypass wind damper, and described boiler master system directly controls the frequency converter frequency or the movable vane aperture of primary air fan.
Further, described straight-blowing double-inlet and double-outlet steel ball coal mill comprises two run coal bins, two feeders, coal pulverizer and two separators, described feeder is sent into the raw coal of corresponding run coal bin in the coal pulverizer respectively, described coal pulverizer is connected to the separator that coal powder thickness is separated through tube connector respectively, described separator respectively through powder retrieving pipe so that meal is back to coal pulverizer.
Further, described feeder is connected to coal pulverizer through the mixed coal case, and described bypass airduct is connected to the mixed coal case, describedly goes into to grind airduct and is connected to coal pulverizer.
Compared with prior art, the utlity model has following beneficial effect: wind main-piping pressure of existing primary air fan control, and main-piping pressure will embody with reducing by opening of capacity wind damper is big, capacity wind damper is standard-sized sheet not, has that restriction loss is big, governing speed waits shortcoming slowly; And the utility model is with capacity wind damper standard-sized sheet, the direct burner hearth powder amount of going into as required of boiler master calculates suitable primary air fan main-piping pressure, be that the boiler master system directly affacts exerting oneself of primary air fan, not only significantly reduced the restriction loss of capacity wind damper, and the response time is faster, thereby improved the unit regulation quality because time inertia reduces, the variable frequency adjustment precision of primary air fan also is higher than the baffle plate degree of regulation of capacity wind damper in addition.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Fig. 1 is the organigram of the utility model embodiment.
Fig. 2 is the control principle figure of the utility model embodiment.
Fig. 3 is the adjusting flow chart of the utility model embodiment.
Among the figure: 1-run coal bin, 2-feeder, 3-coal pulverizer, the 4-separator, 5-powder retrieving pipe, 6-primary air fan, the 7-air preheater, 8-air preheater inlet damper, the female pipe of 9-heat primary air, the female pipe of the cold wind of 10-, the female pipe of wind of 11-, 12-goes into to grind airduct, 13-bypass airduct, damper of 14-total heat, the total cold damper of 15-, 16-capacity wind damper, 17-bypass wind damper, 18-mixed coal case.
The specific embodiment
Shown in Fig. 1 ~ 3, a kind of straight-blowing double-inlet and double-outlet steel ball grinds the energy saving optimizing system, comprise straight-blowing double-inlet and double-outlet steel ball coal mill, primary air system and boiler master system, described primary air system is mainly by the primary air fan 6 that contains movable vane, air preheater 7, damper, compositions such as airduct, a wind of described primary air fan 6 output elevated pressures, become heat primary air after one tunnel process heat exchange of air preheater 7 of a wind, another road of a wind is a cold wind without air preheater 7, the entrance and exit of described air preheater 7 generally all disposes damper, described heat primary air, a cold wind is respectively through the female pipe 9 of heat primary air, a cold wind airduct 10 confluxes to the female pipe 11 of wind, the female pipe 10 of a described wind was divided into before a wind enters straight-blowing double-inlet and double-outlet steel ball coal mill into mill airduct 12 and bypass airduct 13, the female pipe 9 of described heat primary air is provided with damper 14 of total heat, the female pipe 10 of a described cold wind is provided with a total cold damper 15, but describedly go into to grind airduct 12 and be provided with under manual adjustments and the normality the manually capacity wind damper 16 of standard-sized sheet, described bypass airduct 13 is provided with bypass wind damper 17, and described boiler master system directly controls the frequency converter frequency or the movable vane aperture of primary air fan 6.
In the present embodiment, described boiler master system is that present thermal power generation unit is used for calculating the suitable burner hearth powder amount of going into specially, general boiler master system is carried out by capacity wind damper at the final actuator of straight-blowing double-inlet and double-outlet steel ball coal mill, and boiler master of the present utility model system directly changes the frequency (during primary air fan configuration frequency converter) of primary air fan or regulates primary air fan movable vane (when not disposing frequency converter at primary air fan or as a kind of reserve means of configuration frequency converter).
In the present embodiment, described straight-blowing double-inlet and double-outlet steel ball coal mill comprises two run coal bins 1, two feeders 2, coal pulverizer 3 and two separators 4, described feeder 2 is sent into the raw coal of corresponding run coal bin 1 respectively in the coal pulverizer 3, described coal pulverizer 3 is connected to the separator 4 that coal powder thickness is separated through tube connector respectively, described separator 4 respectively through powder retrieving pipe 5 meal is back to coal pulverizer 3.
In the present embodiment, described feeder 2 is connected to coal pulverizer 3 through mixed coal case 18, and described bypass airduct 13 is connected to mixed coal case 18, describedly goes into to grind airduct 12 and is connected to coal pulverizer 3.Described feeder 2 under automatic condition, when capacity air quantity (also claiming primary air flow) less than 60% the time, can reduce the rotating speed of feeder 2 automatically, till primary air flow is normal, otherwise till being transferred to 12.5 rotating speeds with the speed of 25% aperture/min.
In the present embodiment, when normality manual adjustments capacity wind damper 16 to full-gear, the aperture of manual adjustments capacity wind damper 16 when lifting load; Primary air fan 6 is pondage wind damper 16 main-piping pressures not, and directly control the frequency converter frequency of primary air fan 6 or the movable vane aperture is gone into burner hearth with adjusting air quantity by the boiler master system.
In the present embodiment, described boiler master system regulates primary air fan 6 according to boiler load, its control method may further comprise the steps: the load value of setting boiler, load setting value and be input to arithmetic unit together from the actual power power of in-situ transducer, arithmetic unit is by the digital electro-hydraulic by-pass valve control aperture control actual load of steam turbine; Estimate out the blast estimated value one time according to the load setting value; Set the main steam pressure of boiler, main steam pressure setting value and main steam actual value input arithmetic unit, blast operation values of arithmetic unit output; A blast estimated value and the addition of a blast operation values are calculated a required wind pressure value, frequency converter frequency or movable vane aperture that the boiler master system regulates primary air fan 6 according to the difference of a required wind pressure value and a blast actual value adjusting.
The utility model will have boiler master output now and regulate the capacity wind damper 16 that the capacity wind damper 16 of steel ball mill is transformed into manual adjustments steel ball mill, the operations staff only just carries out pondage wind damper 16 when lifting load, capacity wind damper 16 normalities are in full-gear basically with the minimizing restriction loss, and utilize the boiler master system directly to control the frequency converter frequency or the movable vane aperture of primary air fan 6.The primary air fan 6 of this straight-blowing double-inlet and double-outlet steel ball mill energy saving optimizing system and the differential pressure between the capacity wind damper 16 are about 1KPa, one time the female pipe of wind 11 blast are regulated between 6 ~ 13KPa, the energy-conservation table before and after transforming following (getting the mean value of unit transformation front and back in one week compares).
In addition, the method of operation of maintenance capacity wind damper 16 baffle plate standard-sized sheets, not only eliminated a wind in a large amount of restriction loss in 16 baffle plate places of capacity wind damper, and the influence of having avoided capacity wind damper 16 baffle plate bites, actuator failures etc. to cause system to regulate.Simultaneously, because capacity wind damper 16 baffle plates keep full-gear, changed the frequent method of operation of regulating of baffle plate actuator of capacity wind damper 16, actuator is in holding state substantially, the energy consumption of its motor when greatly reducing baffle plate actuator (every stove 8) action of capacity wind damper 16.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. a straight-blowing double-inlet and double-outlet steel ball grinds the energy saving optimizing system, comprise straight-blowing double-inlet and double-outlet steel ball coal mill, primary air system and boiler master system, described primary air system is mainly by the primary air fan that contains movable vane, air preheater, damper, compositions such as airduct, it is characterized in that: a wind of described primary air fan output elevated pressures, become heat primary air after one tunnel process heat exchange of air preheater of a wind, another road of a wind is a cold wind without air preheater, described heat primary air, a cold wind is respectively through the female pipe of heat primary air, a cold wind airduct confluxes to the female pipe of wind, the female pipe of a described wind was divided into before a wind enters straight-blowing double-inlet and double-outlet steel ball coal mill into mill airduct and bypass airduct, the female pipe of described heat primary air is provided with damper of total heat, the female pipe of a described cold wind is provided with a total cold damper, but describedly go into to grind airduct and be provided with under manual adjustments and the normality the manually capacity wind damper of standard-sized sheet, described bypass airduct is provided with bypass wind damper, and described boiler master system directly controls the frequency converter frequency or the movable vane aperture of primary air fan.
2. straight-blowing double-inlet and double-outlet steel ball according to claim 1 grinds the energy saving optimizing system, it is characterized in that: described straight-blowing double-inlet and double-outlet steel ball coal mill comprises two run coal bins, two feeders, coal pulverizer and two separators, described feeder is sent into the raw coal of corresponding run coal bin in the coal pulverizer respectively, described coal pulverizer is connected to the separator that coal powder thickness is separated through tube connector respectively, described separator respectively through powder retrieving pipe so that meal is back to coal pulverizer.
3. straight-blowing double-inlet and double-outlet steel ball according to claim 2 mill energy saving optimizing system, it is characterized in that: described feeder is connected to coal pulverizer through the mixed coal case, and described bypass airduct is connected to the mixed coal case, describedly goes into to grind airduct and is connected to coal pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200466178U CN203082908U (en) | 2013-01-29 | 2013-01-29 | Energy conservation optimization system of direct-blow-type double-inlet and double-outlet steel ball mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200466178U CN203082908U (en) | 2013-01-29 | 2013-01-29 | Energy conservation optimization system of direct-blow-type double-inlet and double-outlet steel ball mill |
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| CN203082908U true CN203082908U (en) | 2013-07-24 |
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| CN2013200466178U Expired - Fee Related CN203082908U (en) | 2013-01-29 | 2013-01-29 | Energy conservation optimization system of direct-blow-type double-inlet and double-outlet steel ball mill |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047670A (en) * | 2013-01-29 | 2013-04-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN104180384A (en) * | 2014-08-14 | 2014-12-03 | 西安西热锅炉环保工程有限公司 | System and method of blending combustion of coal type with low ash melting point in coal-fired utility boiler |
| CN104258942A (en) * | 2014-10-17 | 2015-01-07 | 张沁玥 | Ball mill |
| CN106017604A (en) * | 2016-07-13 | 2016-10-12 | 中国华电科工集团有限公司 | Fill level measuring device for ball mill, ball mill and coal milling system |
| CN106563537A (en) * | 2016-11-07 | 2017-04-19 | 西安交通大学 | Mill load detection method based on vibration signals of throwing-down area and sliding area of surface of barrel |
-
2013
- 2013-01-29 CN CN2013200466178U patent/CN203082908U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047670A (en) * | 2013-01-29 | 2013-04-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN103047670B (en) * | 2013-01-29 | 2015-06-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN104180384A (en) * | 2014-08-14 | 2014-12-03 | 西安西热锅炉环保工程有限公司 | System and method of blending combustion of coal type with low ash melting point in coal-fired utility boiler |
| CN104180384B (en) * | 2014-08-14 | 2016-08-24 | 西安西热锅炉环保工程有限公司 | Coal-fired power station boiler mixes the System and method for burning low ash smelting point coal |
| CN104258942A (en) * | 2014-10-17 | 2015-01-07 | 张沁玥 | Ball mill |
| CN104258942B (en) * | 2014-10-17 | 2016-05-04 | 张沁玥 | Ball mill |
| CN106017604A (en) * | 2016-07-13 | 2016-10-12 | 中国华电科工集团有限公司 | Fill level measuring device for ball mill, ball mill and coal milling system |
| CN106563537A (en) * | 2016-11-07 | 2017-04-19 | 西安交通大学 | Mill load detection method based on vibration signals of throwing-down area and sliding area of surface of barrel |
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| 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: 20130724 Termination date: 20150129 |
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| EXPY | Termination of patent right or utility model |