CN209295188U - Boiler system - Google Patents
Boiler system Download PDFInfo
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- CN209295188U CN209295188U CN201821936920.4U CN201821936920U CN209295188U CN 209295188 U CN209295188 U CN 209295188U CN 201821936920 U CN201821936920 U CN 201821936920U CN 209295188 U CN209295188 U CN 209295188U
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- air
- carrying
- supply lines
- boiler
- multifunctional
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- 230000007246 mechanism Effects 0.000 claims abstract description 147
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000005496 tempering Methods 0.000 claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 109
- 239000000446 fuel Substances 0.000 claims description 71
- 230000033228 biological regulation Effects 0.000 claims description 21
- 239000002912 waste gas Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 5
- 230000009467 reduction Effects 0.000 description 30
- 238000000227 grinding Methods 0.000 description 23
- 239000003245 coal Substances 0.000 description 21
- 230000008859 change Effects 0.000 description 18
- 238000002485 combustion reaction Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 239000000428 dust Substances 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000005764 inhibitory process Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000006399 behavior Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001535 kindling effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000009790 rate-determining step (RDS) Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Landscapes
- Air Supply (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The utility model provides the boiler system that can be improved boiler efficiency and realize the good operating of efficiency.Boiler system has: carrying and uses air supply lines；Exhaust gas pumping-out line；Air preheater is separately connected with carrying with air supply lines and exhaust gas pumping-out line, is preheated with the carrying flowed in air supply lines with air by the exhaust gas flowed in exhaust gas pumping-out line in carrying；The carrying upstream side of the air preheater in air supply lines is connect by circuitous with downstream side；Grinder is set to carrying air supply lines；Air feeder supplies sealing air or tempering air to the inside of boiler；Branched line from branch between the interconnecting piece and air preheater in circuitous downstream side of the carrying in air supply lines, and is connect with air feeder；And branch flow adjustment mechanism, the flow of the carrying circulated in branched line air can be adjusted.
Description
Technical field
The utility model relates to have the boiler system of boiler, primary sky that is more particularly, to dry and carrying fuel
The temperature adjustment of gas (carry and use air).
Background technique
Such as the boiler system for having the coal-burning boiler using coal as fuel has for coal crushing to be obtained coal dust etc.
The grinder of micro mist, the micro-powder fuel generated from grinder (are carried with empty by the primary air supplied to grinder
Gas) and boiler (burner) is carried to via coal pipe.Due to containing moisture in coal, removed in the case where drying is insufficient
When fortune generates hydrogenesis on the way, there are coal dust to fixed inside coal pipe and grinding machine so as to cause blocking a possibility that,
A possibility that combustibility is had an impact.Therefore, all the time, by the way that the air preheat of the heat of the exhaust gas of boiler is utilized
The primary air that device (AH) opposite direction grinder imports is heated (preheating) in advance, and combustion is dried by the air after the preheating
Expect (for example, referring to Patent Documents 1 to 2).More specifically, it is included to the route (pipeline) of grinder supply primary air
For generating by the route of the AH primary air (hereinafter referred to as hot-air) preheated and being generated and being bypassed to AH
Not by the route of the AH primary air (hereinafter referred to as cold air) preheated.Also, it is empty by adjusting the heat of the flow of hot-air
The respective aperture of cold air air door of the flow of gas air door and adjustment cold air controls to adjust the flow of hot-air and cold air
Ratio supplies the primary air for becoming required temperature by mixing above-mentioned air to grinder.
In the past, the above-mentioned respective aperture of cold air air door and hot-air air door was controlled, by grinder
The temperature (grinding machine outlet temperature, mill entrance temperature) of the primary air of outlet or inlet is set as constant and carries out for target,
Suitably to carry out the drying of the coal based on primary air.The outlet of grinder, the primary air of inlet temperature root
It changes according to amount of moisture, the fuel in supply amount from the fuel such as above-mentioned coal to grinder, the supply amount of primary air.
It should be noted that for the amount of moisture in coal, it is different according to coal, in general, washy coal is then to mill
The primary air temperature of machine unit feeding is higher.However, the moisture for example in fuel the case where tailing off inferior needs make to mill
When the temperature of the primary air of machine unit feeding reduces, if increasing the aperture of cold air air door, the stream of the cold air of AH is bypassed
Amount increases, therefore the heat exchange amount at AH reduces.Therefore, the deterioration of boiler efficiency is generated, in the temperature by the exhaust gas after AH
It rises.Exhaust gas is more than subsequent equipment by the subsequent equipments such as electric dust collecting means (EP), chimney, but in exhaust gas temperature after through AH
It when design temperature, needs to reduce the load of boiler to operate, the efficient operating of boiler can be interfered.
For this project, in patent document 1, being used in will be by a part of the primary air (hot-air) after AH
Halfway to the primary air branched line that auxiliary air side is sent into from primary air route branched halfway and with auxiliary air route
Connection, and flow control valve is set in primary air branched line.That is, by by a part of hot-air to auxiliary air side
It is sent into, such as even if the less inferior primary air amount also ensured that through AH of situation of moisture in fuel.It needs to illustrate
It is that total flow of primary air and auxiliary air is controlled by push-in type air blower (FDF), divides route in the downstream of FDF
Branch, so that primary air and auxiliary air be separated and sent respectively to AH.Also, by the once air of flowing wherein
Route on the primary air air blower (PAF) that is arranged determine the flow of primary air and the flow of auxiliary air.
In addition, having heat exchanger in patent document 2, which, which passes through, makes locating flowing on the upstream side than AH
Auxiliary air carries out heat exchange in the primary air than flowing at AH downstream, to carry out the temperature tune of primary air
Section.In other words, heat exchanger is set in the outlet side of the AH of primary air route, such as the situation that the moisture in fuel is less
It is inferior, the secondary sky of the entrance side of the AH of the hot-air and auxiliary air route of the outlet side of the AH by making primary air route
Gas carries out heat exchange to reduce the temperature of primary air.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2002-106831 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2003-214621 bulletin
Utility model content
Utility model project to be solved
In general, in the operating of pulverized coal fired boiler, by air ratio (actual combustion air amount and the theory of the inside of boiler
The ratio between air capacity) control be it is constant.However, in patent document 1, if primary air is fed through auxiliary air, carry to
Primary air amount needed for the fuel of grinder supply is correspondingly reduced, therefore the air capacity of FDF push-in is constant, and PAF is corresponding
Ground drive etc. to increase primary air amount.As a result, primary air amount increases, auxiliary air amount correspondingly subtracts
It is few, and primary air also flows in the circuitous for getting around AH, thus flowed in AH air capacity (primary air and
Auxiliary air adds up to) it reduces.Therefore, it is impossible to expect the heat exchanger effectiveness of the exhaust gas and primary air and auxiliary air in AH
The improvement of (heat transfer efficiency).
In addition, the auxiliary air of the entrance of AH is preheated and temperature rises, therefore in AH in the method for patent document 2
Preheating side liquid (exhaust gas) and heated side liquid (auxiliary air) temperature difference reduce.Therefore, it is impossible to expect that the heat in AH is handed over
Change the improvement of efficiency.
In view of the foregoing, the purpose of at least one embodiment of the utility model is, provides raising boiler efficiency
And it can be realized the boiler system of the good operating of efficiency.
Solution for solving the problem
(1) boiler system involved at least one embodiment of the utility model has: carrying and uses air supply line
Road is used to supply the carrying air for carrying fuel to boiler；Exhaust gas pumping-out line, being used for will be in the boiler
Portion due to the fuel burning and the exhaust gas that generates is discharged to outside；Air preheater is supplied with the carrying with air
It is separately connected to route and the exhaust gas pumping-out line, for the exhaust gas by being flowed in the exhaust gas pumping-out line
And it is preheated with the carrying flowed in air supply lines with air in the carrying；Circuitous, will be described
It carries and is connect with the upstream side of the air preheater in air supply lines with downstream side, for making the carrying air
It is flowed around the air preheater；Grinder is set to the carrying air supply lines, is used for Xiang Suoshu
The fuel of boiler supply crushes；Air feeder, it includes supply the close of sealing air to the inside of the boiler
Seal air feeder and to the inside of the boiler supply tempering air cooling air feedway at least one
Side；Multifunctional air supply lines, from the carrying company in the circuitous downstream side in air supply lines
Branch between socket part and the air preheater, and connect with the air feeder；And multipurpose flow adjusts machine
Structure is set to the multifunctional air supply lines, can be multi-purpose to what is flowed in the multifunctional air supply lines
The flow of way air is adjusted.
According to the structure of above-mentioned (1), it is configured to be connected with multifunctional air supply lines with air supply lines in carrying
(being at this time aftermentioned branched line), the multifunctional air supply lines can make the carrying after being preheated by air preheater empty
At least part of gas (hot-air) is not towards grinder and towards air feeder (seal gas feedway, cooling
Air feeder) flowing, and the stream of the hot-air flowed by multifunctional air supply lines to air feeder
Amount is adjusted by multipurpose flow rate adjusting mechanism (being at this time aftermentioned branch flow adjustment mechanism).That is, hot-air is at least
A part can be expelled to multifunctional air supply lines, since hot-air is discharged, so as to not reduce by air preheater
The flow of air is used in the carrying of preheating, and reduces the flow of the hot-air supplied to grinder.Therefore, even if not increasing
Circuitous circulation not by the flow of carrying air (cold air) of air preheater preheating, also can reduce to grinding machine
The carrying when unit feeding temperature of air.Therefore, it can be avoided the reduction of (inhibition) boiler efficiency, and can reduce mill
The entrance of machine device or the carrying of the outlet temperature of air.
Also, as described above, can be avoided when the temperature of the entrance of grinder or the carrying air of outlet reduces
(inhibition) carries out the reduction of the air capacity of heat exchange in air preheater with exhaust gas, therefore can prevent exhaust gas temperature is more than to set
Set the situation as the design temperature of the subsequent equipment in the downstream side of the air preheater of exhaust gas pumping-out line.Therefore, can
Prevent to reduce load in order not to the design temperature more than above-mentioned subsequent equipment to operate the situation of boiler, is able to carry out effect
The operating of the good boiler of rate.
(2) boiler system involved at least one embodiment of the utility model has: carrying and uses air supply line
Road is used to supply the carrying air for carrying fuel to boiler；Exhaust gas pumping-out line, being used for will be in the boiler
Portion due to the fuel burning and the exhaust gas that generates is discharged to outside；Air preheater is supplied with the carrying with air
It is separately connected to route and the exhaust gas pumping-out line, it is right by the exhaust gas flowed in the exhaust gas pumping-out line
It is preheated with the carrying flowed in air supply lines with air in the carrying；Circuitous, by the carrying
It is connect with the upstream side of the air preheater in air supply lines with downstream side, for bypassing the carrying with air
The air preheater and flow；Grinder is set to the carrying air supply lines, and being used for will be to the boiler
The fuel of supply crushes；Air feeder, it includes the sealing to the inside of boiler supply sealing air is empty
At least one party of air feed system and the cooling air feedway to the inside of boiler supply tempering air；It is multi-purpose
Way air supply lines, the multifunctional air for being used to use as the sealing air or the tempering air to
The air feeder supply；Multipurpose flow rate adjusting mechanism is set to the multifunctional air supply lines, can be right
The flow of the multifunctional air flowed in the multifunctional air supply lines is adjusted；And heat exchanger,
It is pre- with the interconnecting piece in the circuitous downstream side in air supply lines and the air in the carrying for carrying out
Heat exchange of the carrying air flowed between hot device with the multifunctional air.
According to the structure of above-mentioned (2), be configured to by using heat exchanger to the temperature after being preheated by air preheater compared with
(multipurpose is empty for the lower air of temperature that high carrying is flowed with air (hot-air) and in multifunctional air supply lines
Gas) carry out heat exchange, so as to reduce the temperature of hot-air, and be configured to by multifunctional air supply lines and
The flow of the multifunctional air flowed in air feeder can be adjusted by multipurpose flow rate adjusting mechanism.As a result, can
Enough flows for not reducing the carrying air by air preheater preheating, and can reduce the hot-air supplied to grinder
Temperature.Therefore, even if not increasing the carrying air (cold air) not preheated by air preheater in circuitous circulation
Flow also can reduce the temperature of the carrying air when supplying to grinder.Therefore, it can be avoided (inhibition) boiler effect
The reduction of rate, and can reduce the temperature of the entrance of grinder or the carrying air of outlet.
Also, as described above, can prevent to reduce load in order not to the design temperature more than subsequent equipment to transport
The situation for turning boiler is able to carry out the operating of the good boiler of efficiency.Also, in above-mentioned heat exchanger, multifunctional air
It is not directly contacted with carrying with air (hot-air), therefore can be avoided and wrapped in the carrying air of air preheater preheating
The dust contained is mixed into multifunctional air.Therefore, for the pot of multifunctional air (also including sealing air, tempering air) flowing
Each position of furnace system can be avoided the situation of the abrasion as caused by dust mixed in this way, it can be ensured that boiler system it is reliable
Property.
(3) in several embodiments, on the basis of the structure of above-mentioned (1) to (2), the air feeder will be advised
The supply air of constant flow is supplied to the inside of the boiler, and the supply air of the regulation flow is by the multifunctional air
The multifunctional air flowed in supply lines and the multipurpose flowed in the multifunctional air supply lines are empty
At least one party of outside air other than gas is constituted.
In general, being sensed in boiler system according to the oxygen of the upstream side for the air preheater that exhaust gas pumping-out line is arranged in
The measured value of device (O2 sensor) etc. is set with making the air of inside of boiler control push-in type air blower etc. than constant mode
It is standby, if but being supplied from air feeder to the supply air that the inside of boiler supplies with via multifunctional air supply lines
The flow of multifunctional air correspondingly increase, then air ratio correspondingly increases.
According to the structure of above-mentioned (3), air feeder be not supplied to multi-purpose via multifunctional air supply lines
In the case where the air of way, the outside air of regulation flow is only supplied to the inside of boiler, on the other hand, via multifunctional air
Supply lines and in the case where being supplied to multifunctional air, supply the conjunction by outside air and multifunctional air to the inside of boiler
The air for counting the regulation flow same as described above constituted is given.That is, air feeder is via multifunctional air supply lines
And in the case where being supplied to multifunctional air, the flow of outside air and multifunctional air is correspondingly reduced, thus to boiler
The air of inside supply regulation flow.Thereby, it is possible to make lambda sensor not to be mostly used by via multifunctional air supply lines
Way air is supplied to the inside of boiler and the influence of generation, therefore can make to supply by air feeder to the inside of boiler
The multifunctional air given does not have an impact the operating control of boiler system.
(4) in several embodiments, on the basis of the structure of above-mentioned (1) to (3), the boiler system is also equipped with pair
The multipurpose volume control device that the aperture of the multipurpose flow rate adjusting mechanism is controlled.
According to the structure of above-mentioned (4), the aperture of multipurpose flow rate adjusting mechanism is controlled by multipurpose volume control device,
It is adjusted so as to the flow automatically to the multifunctional air by multifunctional air supply lines.
(5) in several embodiments, on the basis of the structure of above-mentioned (4), the boiler system is also equipped with to described
The waste gas outlet temperature that the outlet temperature of the air preheater in exhaust gas pumping-out line, that is, waste gas outlet temperature is detected
Measuring mechanism, the multipurpose volume control device control the multipurpose flow adjustment machine according to the waste gas outlet temperature
The aperture of structure.
According to the structure of above-mentioned (5), the aperture of multipurpose flow rate adjusting mechanism (passes through the more of multifunctional air supply lines
The flow of purposes air) it is adjusted according to above-mentioned waste gas outlet temperature.For example, in particular, in multifunctional air supply lines
For from the branch of branch between the interconnecting piece and air preheater in the circuitous downstream side in carrying air supply lines
In the case where route, when waste gas outlet temperature is higher than specified value hot-air be discharged via branched line (hot-air by point
Branch line), so that the measured value that the flowmeter of entrance of grinder etc. is arranged in becomes smaller.Due to the flow of carrying air
It is determined according to the amount of fuel, therefore increases the flow of carrying air to supplement the multifunctional air for being expelled to branched line
Partial flow.Then, for example, carrying is increased with air mass flow by push-in type air blower (FDF), then more carry is used
Air is capable of increasing the heat exchange amount with the heat of the exhaust gas of air preheater by air preheater, can reduce useless
Gas outlet temperature.Therefore, it can be improved boiler efficiency, and can prevent in order not to be more than the design temperature of subsequent equipment
And load is reduced to operate the situation of boiler, it is able to carry out the operating of the good boiler of efficiency.
(6) in several embodiments, on the basis of the structure of above-mentioned (4) to (5), the multipurpose flow control dress
It sets according to the moisture content of the fuel supplied to the grinder and controls opening for the multipurpose flow rate adjusting mechanism
Degree.
According to the structure of above-mentioned (6), the aperture of multipurpose flow rate adjusting mechanism is according to the moisture content (unit volume of fuel
Amount of moisture etc.) and adjust.That is, being caused in order to prevent due to the heat of carrying air if the moisture content of fuel tails off
The drying of fuel excessively carries out the mill entrance temperature for needing to reduce carrying air so as to cause kindling etc. or grinding machine outlet temperature
Degree, but such situation judges according to the moisture content of fuel.Also, for example, if not increasing can adjust in circuitous
Aperture of cold air amount adjustment mechanism of the flow of the cold air of circulation etc. and multipurpose flow rate adjusting mechanism is set as open shape
State, then can not reduce the flow of the hot-air preheated by air preheater 3, and the carrying reduced when supplying to grinder is used
The temperature of air.Therefore, can prevent the reduction of boiler efficiency, the downstream side of air preheater exhaust gas temperature rise.
(7) in several embodiments, on the basis of the structure of above-mentioned (4) to (6), quantity of hot air adjustment mechanism,
Be arranged in the downstream side of the air preheater the carrying air supply lines and the circuitous interconnecting piece with
It, can be to the flow by the carrying air, that is, hot-air after air preheater preheating between the air preheater
It is adjusted；Cold air amount adjustment mechanism, is set to the circuitous, can be to the institute flowed in the circuitous
The flow for stating carrying air is adjusted；Temperature survey mechanism, to the outlet temperature and inlet temperature of the grinder
In the temperature of at least one party detect；And cold and hot aperture determination device, basis are detected by the temperature survey mechanism
To the temperature determine the aperture of the quantity of hot air adjustment mechanism and the cold air amount adjustment mechanism, it is described multi-purpose
The aperture for the cold air amount adjustment mechanism that way volume control device is determined according to the cold and hot aperture determination device is i.e. certainly
Aperture is determined to control the aperture of the multipurpose flow rate adjusting mechanism.
According to the structure of above-mentioned (7), the aperture of multipurpose flow rate adjusting mechanism is according to the decision of cold air amount adjustment mechanism
Aperture and control.Specifically, in the case where the decision aperture of cold air amount adjustment mechanism is defined aperture threshold value or more,
In the case where the decision aperture of cold air amount adjustment mechanism has become larger more than defined aperture change threshold from aperture before
Deng multipurpose flow rate adjusting mechanism is set as opening state.Thereby, it is possible to avoid the aperture of cold air amount adjustment mechanism from (determining
Aperture) become larger to be more than aperture threshold value.Also, in the above cases, since hot-air is expelled to circuitous, so as to
The temperature for reducing carrying air when supplying to grinder, can prevent the reduction of boiler efficiency.
Utility model effect
At least one embodiment according to the present utility model provides and improves boiler efficiency and to can be realized efficiency good
The boiler system of operating.
Detailed description of the invention
Figure 1A is that have multifunctional air supply lines involved in an embodiment of the utility model and be mostly used
The synoptic diagram of the boiler system of way flow rate adjusting mechanism, multifunctional air supply lines are branched line, the adjustment of multipurpose flow
Mechanism is branch flow adjustment mechanism.
Figure 1B is that have multifunctional air supply lines involved in an embodiment of the utility model and be mostly used
The synoptic diagram of the boiler system of way flow rate adjusting mechanism is provided with heat exchanger in multifunctional air supply lines.
Fig. 2 is the sky for being distributed by control to each route involved in an embodiment to the utility model
The case where figure that the transition of tolerance are illustrated, the multifunctional air supply lines corresponding to Figure 1A are branched lines.
Fig. 3 is for the air capacity involved in an embodiment to the utility model by control to each route
The figure that the behavior of distribution is illustrated, it is corresponding with Figure 1A, but the control content started in the initial state is different from Fig. 2.
Fig. 4 is the sky for being distributed by control to each route involved in an embodiment to the utility model
The case where figure that the transition of tolerance are illustrated, the multifunctional air supply lines Lm corresponding to Figure 1B is not branched line Lf.
Fig. 5 is for the air capacity involved in an embodiment to the utility model by control to each route
The figure that the behavior of distribution is illustrated, it is corresponding with Figure 1B, but the control content started in the initial state is different from Fig. 4.
Fig. 6 is to show involved in an embodiment of the utility model to have branched line and branch flow adjustment
The flow chart of the method for operation of the boiler system of mechanism.
Description of symbols
1 boiler system；12m multipurpose volume control device；12 branch flow control devices；14 cold and hot apertures determine dress
It sets；2 boilers；3 air preheaters；4 grinders；5 air feeders；A supplies air；As outside air；6m multipurpose stream
Measure adjustment mechanism；6 branch flow adjustment mechanisms；71 quantity of hot air adjustment mechanisms；72 cold air amount adjustment mechanisms；81 is primary empty
Enraged blower (PAF)；82 push-in type air blowers (FDF)；91 lambda sensors；92 flowmeters；93 temperature survey mechanisms；94 exhaust gas
Outlet temperature measuring mechanism；F fuel；L1a coal pipe；L1, which is carried, uses air supply lines；L2 combustion air supply lines；
Lb circuitous；Le exhaust gas pumping-out line；Ca merging part (is carried with air supply lines and circuitous downstream side)；Lm
Multifunctional air supply lines；Lf branched line；Ls airline；Ge exhaust gas；The total air of Ga (is carried and is used with air and burning
Air)；Air is used in G1 carrying；G2 combustion air；Gb cold air；Gh hot-air；Gm multifunctional air.
Specific embodiment
Hereinafter, being illustrated referring to several embodiments of the attached drawing to the utility model.Wherein, remembered as embodiment
Size, material, shape, its relative configuration of the interior component parts perhaps shown in the drawings carried etc. are not configured to the utility model
Range be defined in this, be only to illustrate example.
For example, the tables such as " in some directions ", " along certain direction ", " parallel ", " orthogonal ", "center", " concentric " or " coaxial "
Show that opposite or absolute configuration statement not only indicates strictly to be also represented by with tolerance or can obtain identical for such configuration
Angle, the distance of the degree of function and the state of relative displacement.
For example, " identical ", " equal " and " equalization " etc. indicates that the statement of the equal state of things not only indicates stringent equal
State, be also represented by the state of the difference there are tolerance or the degree that identical function can be obtained.
For example, quadrilateral shape, cylindrical shape etc. indicate that the statement of shape not only indicates geometrically proper four
The shapes such as side shape, cylindrical shape are also manifested by the shape comprising bump, corner portion etc. in the range of capable of obtaining same effect
Shape.
On the other hand, " outfit ", " having ", " having ", "comprising" or " having " constituent element are such states not
It is the existing exclusiveness statement for excluding other constituent elements.
Figure 1A is that have multifunctional air supply lines Lm and more involved in an embodiment of the utility model
The synoptic diagram of the boiler system 1 of purposes flow rate adjusting mechanism 6m, multifunctional air supply lines Lm are branched line Lf, multipurpose
Flow rate adjusting mechanism 6m is branch flow adjustment mechanism 6.Figure 1B is that have involved in an embodiment of the utility model
The synoptic diagram of the boiler system 1 of multifunctional air supply lines Lm and multipurpose flow rate adjusting mechanism 6m, in multifunctional air
Supply lines Lm is provided with heat exchanger 62.
As shown in Figure 1A~Figure 1B, boiler system 1 is that have the system of boiler 2, and have: the carrying connecting with boiler 2
With air supply lines L1 and exhaust gas pumping-out line Le, air preheater 3, circuitous Lb, grinder 4, air supply dress
Set 5, multifunctional air supply lines Lm and multipurpose flow rate adjusting mechanism 6m.Hereinafter, boiler 2 is set as example making with coal
It is illustrated for the coal-burning boiler (pulverized coal fired boiler) of fuel F.But the utility model is not limited to present embodiment.
For example, boiler 2 may be to be made with the solid fuel other than such as biomass fuel etc., coal in other several embodiments
For the boiler 2 of fuel F.
Hereinafter, being illustrated using the above structure that Figure 1A~Figure 1B has boiler system 1.
Carrying is (primary with air G1 for the carrying to the supply of boiler 2 for carrying fuel F with air supply lines L1
Air) pipeline, carrying supplied by the inside of carrying air supply lines L1 to boiler 2 with air G1.As Figure 1A~
Shown in Figure 1B, in general, being connected with carrying air supply lines L1 in boiler 2, and it is connected with for fuel F will to be made to burn
The combustion air supply lines L2 (pipeline) that combustion air G2 (auxiliary air) is supplied to boiler 2, carrying is supplied with air
Route L1 is arranged in a manner of from combustion air supply lines L2 branch.Moreover, carrying the flow with air G1 (when unit
Between air capacity.It is same as below.) and combustion air G2 flow total (flow of total air Ga) by being arranged in than combustion
Burn with air supply lines L2 and carry with the branch location of air supply lines L1 on the upstream side push-in type air blower (with
Under, it is denoted as FDF82:Forced Draft Fan) control.In addition, the flow of carrying air G1 is by being set to carrying air
The primary air air blower (hereinafter referred to as PAF81:Primary Air Fan) of supply lines L1 controls, and is pushed by FDF82
A part 5 in the flow of total air Ga is imported into carrying air supply lines L1 by PAF81.
In the embodiment shown in Figure 1A~Figure 1B, the flow of above-mentioned total air Ga is controlled by FDF82, so that
For measuring the 91 (O of lambda sensor of the air ratio (the ratio between Actual combustion air capacity and theoretical air requirement) of the inside of boiler 22It passes
Sensor) measured value be constant (constant range) (air is than constant control).It should be noted that in the present embodiment, oxygen
The upstream for the air preheater 3 (aftermentioned) that sensor 91 is arranged in exhaust gas pumping-out line Le (aftermentioned).In other several implementations
In mode, the air preheat that also can be set in exhaust gas pumping-out line Le in the inside of boiler 2 is can be set in lambda sensor 91
The downstream of device 3 (aftermentioned).
In addition, above-mentioned carrying is controlled with the flow of air G1 by PAF81 in the embodiment shown in Figure 1A~Figure 1B
(control of mill entrance air capacity), so that being opened in aftermentioned quantity of hot air adjustment mechanism 71, cold air amount adjustment mechanism 72
The measured value for the flowmeter 92 that the flow of (aftermentioned) supply of the lower opposite grinder 4 of degree control measures can be setting value
(setting range).The setting value is determined according to the output order value of boiler 2.More specifically, according to the output order of boiler 2
Value determines the amount of the fuel F (micro-powder fuel) supplied from grinder 4 (aftermentioned) to boiler 2, and will can be determined in this way
The amount of fixed fuel F suitably determines the flow of carrying air G1 to the mode that boiler 2 is carried according to the amount of fuel F.
It should be noted that in the present embodiment, flowmeter 92 be arranged in carrying air supply lines L1 for circuitous
Between the interconnecting piece (merging part Ca) and grinder 4 of the end connection in the downstream side of Lb (aftermentioned).In other several embodiment party
In formula, as long as the flow of carrying air G1 can be measured suitably, flowmeter 92, which also can be set, is for example filling grinding machine
Set the other positions such as the coal pipe L1a that 4 (aftermentioned) are connect with boiler 2.
Exhaust gas pumping-out line Le is that the exhaust gas Ge for generating the inside of boiler 2 due to the burning of fuel F is outside
The pipeline of portion's (outside system) discharge, exhaust gas Ge are discharged by the inside of exhaust gas pumping-out line Le to outside.In general, in exhaust gas
Pumping-out line Le is provided with air-introduced machine, environmental device (for example, removing the denitrification apparatus of denitrification, removal coal dust from exhaust gas
Dust arrester, remove the desulfurizer etc. of oxysulfide), so that exhaust gas Ge is by innoxious and arrange from chimney (not shown) to outside
Out.
Moreover, with the fuel F (coal dust) of air supply lines L1 and will be carried with air G1 via carrying in boiler 2
Mixed gas and boiler 2 is blown by burner 22 etc. via the combustion air G2 of combustion air supply lines L2
Inside combustion chamber and burn.In general, in the overheat for being internally provided with the heat for recycling exhaust gas Ge of boiler 2
The heat exchangers such as device, reheater, economizer (not shown), thus the inside for circulating in them water or other fluid and exhaust gas Ge it
Between carry out heat exchange, and then generate steam.Then, exhaust gas Ge is by exhaust gas pumping-out line Le and via chimney to boiler system 1
External discharge.
Air preheater 3 and carrying are separately connected with air supply lines L1 and exhaust gas pumping-out line Le, are for leading to
Cross the exhaust gas Ge that is flowed in exhaust gas pumping-out line Le in carrying with the carrying air G1 flowed in air supply lines L1
The heat exchanger preheated (is GAH) in Figure 1A~Figure 1B.The tool such as fuel F (being in the present embodiment coal) of boiler 2
Have due to type (coal), rainfall and the different property of the amount of moisture that contains.Moreover, in the case where amount of moisture is more, due to
Carry midway generate hydrogenesis, there are fixation from coal dust to above-mentioned coal pipe L1a, cause blocking a possibility that, it is right
A possibility that combustibility has an impact.Therefore, it is heated in advance by 3 pairs of carryings of air preheater with air G1 (pre-
Heat), by the raised carrying of temperature with the heat of air G1 come drying fuel F.In the embodiment shown in Figure 1A~Figure 1B,
In air preheater 3 other than being connected with carrying air supply lines L1 and exhaust gas pumping-out line Le, it is also connected with combustion
It burns and uses air supply lines L2, thus right simultaneously by the higher exhaust gas Ge of the temperature flowed in exhaust gas pumping-out line Le
The lower carrying of temperature is preheated with air G1 and combustion air G2.
The carrying upstream side of the air preheater 3 in air supply lines L1 is connect by circuitous Lb with downstream side,
Be for make carrying air G1 around air preheater 3 and flow pipeline, be for above-mentioned air preheater 3 together
Adjust the structure of the carrying temperature of air G1.As described above, carrying is heated up with air G1 by air preheater 3, if but
It carries and uses the temperature of air G1 excessively high, then there is due to the drying for excessively carrying out fuel F a possibility that catch fire.In
It is that circuitous Lb is set in carrying air supply lines L1, is thus generated due to via circuitous Lb and not by air
The carrying that preheater 3 preheats is not flowed with air G1 (hereinafter referred to as cold air Gb) and in circuitous Lb and directly exists
Carrying air G1 (the hereinafter referred to as hot-air for flowing in carrying air supply lines L1 and being preheated by air preheater 3
Gh), to be adjusted to the carrying preheated by air preheater 3 with the flow of air G1.Then, make cold air Gb and heat empty
Interconnecting piece (merging part of the gas Gh in carrying the air supply lines L1 and circuitous Lb in the downstream side of air preheater 3
Ca) collaborate and mix, thus carry out the adjustment of the temperature of carrying air G1.
More specifically, the carrying flowed in circuitous Lb will can also be carried out with the flow of air G1
The cold air amount adjustment mechanism 72 (such as air door) of adjustment is set to circuitous Lb, by cold air amount adjustment mechanism 72 come
Adjust cold air Gb flow, thus to cold air Gb and hot-air Gh interflow after to grinder 4 it is (aftermentioned) supply when
Carrying is adjusted with the temperature of air G1.Alternatively, as shown in Figure 1A~Figure 1B, can also will opposite grinder 4 supply
To when the quantity of hot air adjustment mechanism 71 (such as air door) that is adjusted with the flow of the flow of air G1, hot-air Gh of carrying
The upstream side of grinder 4 in carrying air supply lines L1 is set together with cold air amount adjustment mechanism 72, to heat
At least one party of the aperture of air amount adjustment device 71 and cold air amount adjustment mechanism 72 is adjusted, thus to removing behind interflow
It is adjusted with the temperature of air G1.Carrying is adjusted to the temperature of air G1 as a result, carries and is filled with the grinding machine of air G1
The temperature (grinding machine outlet temperature) of the temperature (mill entrance temperature) or outlet side of setting the entrance side of 4 (aftermentioned) is in and can prevent
Within the scope of the abnormal predetermined temperature as caused by hydrogenesis, kindling etc..
In the embodiment shown in Figure 1A~Figure 1B, quantity of hot air adjustment mechanism 71 is arranged and is supplied in carrying with air
Above-mentioned merging part Ca in route L1 and between air preheater 3, and the entrance and exit of grinder 4 (aftermentioned) extremely
The temperature survey mechanisms 93 (93u, 93d) such as thermometer are arranged in a few side, carry out the measured value (grinding machine based on temperature survey mechanism 93
At least one party in inlet temperature and grinding machine outlet temperature) above-mentioned aperture adjustment.More specifically, aftermentioned cold and hot aperture is determined
Device 14 is determined so that the measured value of temperature survey mechanism 93 is constant for target, and determines quantity of hot air adjustment mechanism 71, cold air
The aperture of adjustment mechanism 72 is measured, to carry out above-mentioned aperture adjustment.
Grinder 4 is the device that the fuel F for will supply to boiler 2 is crushed, and is set to carrying and is supplied with air
Route L1.Coal (fuel F) is supplied to grinder 4, by 4 smashed coal dust (micro mist) of grinder in coal pipe L1a
It is handled upside down and is carried with air G1 and supplied to boiler 2 (burner 22).It should be noted that being supplied from grinder 4 to boiler 2
The amount for the micro-powder fuel (fuel F) given is determined according to the output order value of boiler 2.
Air feeder 5 includes to the seal gas feedway of the inside of boiler 2 supply sealing air and to pot
At least one party in the cooling air feedway of the inside supply tempering air of furnace 2.Specifically, seal gas supply dress
It sets and is for example supplied with observation window seal gas, complete air blower seal gas, bellows air door seal gas, burner use
Seal gas, ITV seal gas, the various measuring instrumentss device for purifying the sealings air such as air.By the way that use will be sealed
Air is blown into the inside of boiler 2, so that gas of the inside of the boilers such as exhaust gas Ge 2 etc. be prevented to flow out to outside.On the other hand, cold
But air feeder be such as by tempering air frame detector cooling air, igniter cooling air to frame detect
The device that device, igniter supply.The tempering air that cooling air feedway is supplied is after for cooling, to boiler 2
Internal discharge.Sealing is supplied to the inside of boiler 2 respectively as each device of air feeder 5 as a result, or cooling is required
Provide flow.
Moreover, as described above, having the boiler system 1 of above structure with the mill entrance temperature or mill of carrying air G1
The mode that machine outlet temperature is within the temperature range of providing is controlled (control of Mill air temperature).For example, in meander line
The cold air Gb flowed in the Lb of road has due to not preheated by air preheater 3 in the lower state of temperature (such as room temperature)
There is the effect of cooling hot-air Gh.As a result, such as in the case that the amount of moisture of fuel F reduce, in order to prevent fuel F
Temperature that is fiery etc. and needing to reduce carrying air G1 can realize carrying air G1 by increasing the flow of cold air Gb
Temperature reduction.However, if increasing the flow of cold air Gb by the aperture for increasing cold air amount adjustment mechanism 72, heat
The flow of air Gh can be reduced correspondingly.If the flow of hot-air Gh is reduced, the heat exchange amount of air preheater 3 correspondingly subtracts
It is few, therefore reduce the recuperation of heat amount of exhaust gas Ge by (heat loss increase), so that boiler efficiency be made to deteriorate.In addition, if recuperation of heat amount
It reduces, then flow further downstream in the state of correspondingly having higher temperature of the exhaust gas Ge after passing through air preheater 3 is useless at this
The temperature of gas Ge be more than the downstream side setting of air preheater 3 in exhaust gas pumping-out line Le subsequent equipment (air-introduced machine,
Desulfurizer etc.) design temperature in the case where, need to reduce the load of boiler 2 to operate etc., thus become for making
The limitation for the operating control that boiler 2 expeditiously operates.
Then, boiler system 1 is also equipped in addition to above-mentioned structure: the multifunctional air supply lines Lm of beginning and more
Purposes flow rate adjusting mechanism 6m (A~Figure 1B referring to Fig.1).Multifunctional air supply lines Lm is for that will be used as sealing air
Or the pipeline that tempering air and the air (hereinafter referred to as multifunctional air Gm) that uses are supplied to air feeder 5.Separately
Outside, multipurpose flow rate adjusting mechanism 6m is to be set to multifunctional air supply lines Lm, can supply in multifunctional air
The mechanism that the flow of the multifunctional air Gm flowed in route Lm is adjusted, for example, air door, hand-operated valve, automatic valve etc..
The multifunctional air supply lines Lm of embodiment shown in figure 1A is from carrying air supply lines L1
Between the interconnecting piece (merging part Ca) and air preheater 3 in the downstream side of circuitous Lb branch and with air feeder 5
The pipeline of connection.Hereinafter, embodiment as shown in Figure 1A is such, by the multipurpose from carrying with air supply lines L1 branch
Air supply lines Lm is specially referred to as branched line Lf.In addition, by be set to branched line Lf, in branched line Lf
The hot-air Gh of middle flowing (is carried specially to be referred to as with the multipurpose flow rate adjusting mechanism 6m that the flow of air G1) is adjusted and be divided
Branch flow rate adjusting mechanism 6.
That is, branched line Lf (multifunctional air supply lines Lm) will be carried with empty in embodiment shown in figure 1A
Gas supply lines L1 is connect with air feeder 5, the hot-air flowed by branched line Lf to air feeder 5
The flow of Gh (multifunctional air Gm) is adjusted by branch flow adjustment mechanism 6.Specifically, if by the way that branch flow is adjusted machine
Structure 6 is set as closed state and closes the flow path formed by branched line Lf, then hot-air Gh is not flowed to air feeder 5,
If open above-mentioned flow path and branch flow adjustment mechanism 6 is set as opening state, flow corresponding with its aperture
Hot-air Gh is flowed to air feeder 5.Refer to it should be noted that branch flow adjustment mechanism 6 is set as closed state
Aperture is set as minimum, for example, the case where branch flow adjustment mechanism 6 is air door it is inferior, even if in the closed state, can also
There is the flow for passing through branch flow adjustment mechanism 6.
Therefore, in embodiment shown in figure 1A, in the mill entrance temperature or mill for needing to reduce carrying air G1
In the case where machine outlet temperature, for example, by artificial or branch flow control device 12 (aftermentioned) make branch flow adjust machine
The aperture of structure 6 is greater than 0 (opening state), then the flow of the hot-air Gh flowed to grinder 4 can be made correspondingly to reduce.By
This also can reduce carrying sky even if not increasing the aperture of cold air amount adjustment mechanism 72 to increase the flow of cold air Gb
Mill entrance temperature, the grinding machine outlet temperature of gas G1.Also, since branched line Lf makes through the generation of air preheater 3
Hot-air Gh is discharged from carrying air supply lines L1, therefore will not reduce the heat exchange amount of air preheater 3, can prevent
The reduction of boiler efficiency.In addition, the heat exchange amount in air preheater 3 will not be reduced, thus will not make in the above-mentioned latter grade set
The temperature of the exhaust gas Ge of standby flowing rises.
In addition, carrying air G1 and burning sky in embodiment shown in figure 1A, when being supplied to boiler 2
Total flow of gas G2 and the flow for the hot-air Gh being discharged from branched line Lf are correspondingly reduced, in order to make in boiler 2
The air ratio in portion remains constant, and makes the flow of total air Ga and the flow correspondingly increased feelings of the reduction by FDF82
Under condition, the air capacity of increase passes through air preheater 3 respectively after distributing to carrying air G1 and combustion air G2, because
This can be such that the heat exchange amount of air preheater 3 correspondingly increases, and (carrying in air G1 in circuitous Lb with not flowing
Amount).Therefore, can be improved boiler efficiency, and can make air preheater 3 in exhaust gas pumping-out line Le downstream side it is useless
The temperature of gas Ge reduces.Also, machine is adjusted by the way that branch flow adjustment mechanism 6 is set as opening state and reduces cold air amount
The aperture of structure 72 can also be such that the flow of cold air Gb reduces, and in this case, the flow of the part becomes hot-air Gh, therefore
It is capable of the reduction of the raising of further progress boiler efficiency as caused by the increase of heat exchange amount, the temperature of exhaust gas Ge.
It should be noted that in embodiment shown in figure 1A, as usually, to maintain constant primary air amount
The mode of (cold air Gb+ hot-air Gh), which is controlled, (to be become with the measured value of flowmeter 92 according to the load of boiler 2 and is set
The mode of definite value is controlled), therefore can automatically increase the same amount of hot-air Gh of hot-air Gh or cold air with discharge
Gb.In addition, measured value of the air of the inside of usually boiler 2 than the inlet oxygen concentration meter of the exhaust gas Ge by air preheater 3
(measured value of lambda sensor 91) observation, in addition to carrying air G1 (primary air), combustion air G2 (auxiliary air) with
Outside, the supply air A (aftermentioned) supplied from air feeder 5 to the inside of boiler 2 is also included in air ratio.As a result, as aftermentioned
Like that, air feeder 5 reduces the amount of outside air As, so that the total of hot-air Gh and outside air As becomes rule
Constant flow, in the case where the air or cooling air as sealing are supplied to 2 side of boiler, air ratio does not become
Change, therefore the flow of FDF82 does not change.
According to the structure for using above-mentioned Figure 1A to be illustrated, branched line is connected with air supply lines L1 in carrying
Lf, branched line Lf can make at least part of the carrying air G1 (hot-air Gh) after being preheated by air preheater 3
It is flowed not towards grinder 4 towards air feeder 5 (seal gas feedway, cooling air feedway), and
And it is adjusted by the flow of the branched line Lf hot-air Gh flowed to air feeder 5 by branch flow adjustment mechanism 6
It is whole.That is, branched line Lf can be expelled at least part of hot-air Gh, by the way that hot-air Gh is discharged, so as to not
The flow of the carrying air G1 after being preheated by air preheater 3 is reduced, and reduces the hot-air Gh's supplied to grinder 4
Flow.
On the other hand, the one end of the multifunctional air supply lines Lm of embodiment shown in Figure 1B is connected to air confession
To device 5, this point is identical as branched line Lf above-mentioned, but the other end is from carrying air supply lines L1 branch,
The multifunctional air Gm flowed in multifunctional air supply lines Lm is not hot-air Gh (carry and use air G1) but air.
It can also be imported from the other end using the air of such as room temperature as multifunctional air Gm.It more specifically, can also be
The other end is connected with the multifunctional airs gatherers (not shown) such as fan, the air pump of supply air.
In addition, being provided with the heat exchanger 62 of indirect type in multifunctional air supply lines Lm, which is used for
Progress is flowed in carrying between the merging part Ca in the downstream side of the circuitous Lb in air supply lines L1 and air preheater 3
Dynamic carrying is with air G1 with the heat exchange of multifunctional air Gm.Moreover, if by the way that multifunctional air supply lines will be set to
The multipurpose flow rate adjusting mechanism 6m of Lm is set as closed state and closes the flow path formed by multifunctional air supply lines Lm, then
Multifunctional air Gm is not flowed to air feeder 5, and if multipurpose flow rate adjusting mechanism 6m is set as opening state
Open above-mentioned flow path, then the multifunctional air Gm of flow corresponding with its aperture is flowed to air feeder 5.At this point,
The shape for flowing multifunctional air Gm to air feeder 5 and multipurpose flow rate adjusting mechanism 6m is set as opening state
Under state, multifunctional air Gm is stranded in multipurpose unlike in the case where multipurpose flow rate adjusting mechanism 6m is in off state
Air supply lines Lm.Therefore, the lower multifunctional air Gm of temperature is used with its higher carrying of temperature for carrying out heat exchange
The temperature difference of air G1 (hot-air Gh) becomes larger, therefore carrying may further be dropped with the temperature of air G1 due to heat exchange
It is low.
Therefore, in the embodiment shown in Figure 1B, in the mill entrance temperature or mill for needing to reduce carrying air G1
In the case where machine outlet temperature, if for example making multipurpose flow by artificial or multipurpose volume control device 12m (aftermentioned)
The aperture of adjustment mechanism 6m is greater than 0 (opening state), then can make the carrying flowed to grinder 4 with the temperature of air G1 with
The amount of the heat exchange of multifunctional air Gm accordingly decreases.Even if the aperture for not increasing cold air amount adjustment mechanism 72 as a result, is come
The flow for increasing cold air Gb, also can reduce mill entrance temperature, the grinding machine outlet temperature of carrying air G1.Also,
In the case where not reducing the flow by the hot-air Gh of air preheater 3, the heat exchange amount of air preheater 3 will not be reduced,
It can prevent the reduction of boiler efficiency.In addition, the heat exchange amount in air preheater 3 will not be reduced, therefore grade in the above-mentioned latter
The temperature of the exhaust gas Ge of equipment flowing will not rise.
According to the structure for using above-mentioned Figure 1B and being illustrated, by using heat exchanger 62 to pre- by air preheater 3
The higher temperature carried with air G1 (hot-air Gh) and flowed in multifunctional air supply lines Lm of temperature after heat compared with
Low air (multifunctional air Gm) carries out heat exchange, can reduce the temperature of hot-air Gh, and supply by multifunctional air
The flow of the multifunctional air Gm flowed to route Lm to air feeder 5 can be by multipurpose flow rate adjusting mechanism 6m tune
It is whole.That is, in above-mentioned heat exchanger 62, multifunctional air Gm and carrying be not directly contacted with air G1 (hot-air Gh) (
Connect the heat exchanger of formula).In the revolving air preheater 3 of the regeneration being commonly used in boiler system 1, sending to boiler 2
Air (G1, G2) in be mixed into dust sometimes, therefore in branched line Lf, can be also mixed into sometimes in multifunctional air Gm
Dust.However, multifunctional air Gm and carrying are configured to be not directly contacted with air G1, therefore can be avoided by air preheater
Carrying after 3 preheatings is mixed into multifunctional air Gm with the dust for including in air G1.As a result, by making multifunctional air Gm and removing
Heat exchange is carried out in heat exchanger 62 with air G1, and the carrying preheated by air preheater 3 can not be made with air G1's
Flow is reduced, and reduces the flow of the hot-air Gh supplied to grinder 4.It also, (also include close for multifunctional air Gm
Envelope air, tempering air) each position of boiler system 1 of flowing can be avoided and drawn by above-mentioned such mixed dust
The situation of the abrasion risen, it can be ensured that the reliability of boiler system 1.
More than, according to above-mentioned structure (Figure 1A~Figure 1B), even if do not increase flowed in circuitous Lb not by sky
The flow for the carrying air G1 (cold air Gb) that air preheater 3 preheats also can reduce carrying when supplying to grinder 4
With the temperature of air G1.Therefore, it can be avoided the reduction of (inhibition) boiler efficiency, while can reduce the entrance of grinder 4
Or the carrying of the outlet temperature of air G1.
In addition, as described above, when the carrying of the entrance of grinder 4 or outlet is reduced with the temperature of air G1, it can
It avoids (inhibition) from carrying out the reduction of the air capacity of heat exchange with exhaust gas Ge in air preheater 3, therefore exhaust gas temperature can be prevented
Degree is more than the feelings as the design temperature of the subsequent equipment of the downstream side of the air preheater 3 of exhaust gas pumping-out line Le setting
Shape.Therefore, can prevent to reduce load in order not to the design temperature more than subsequent equipment to operate the situation of boiler, energy
Enough carry out the operating of the good boiler 2 of efficiency.
In several embodiments, as shown in Figure 1A~Figure 1B, above-mentioned air feeder 5 will be by being mostly used in above-mentioned
Way air supply lines Lm (is in figure 1A branched line Lf.It is same as below.) in flow multifunctional air Gm (be in Figure 1A
It carries and uses air G1 or hot-air Gh.It is same as below.) with multifunctional air Gm other than outside air As at least one party's structure
At regulation flow supply air A to the inside of boiler 2 supply.That is, air feeder 5 is not being supplied via multifunctional air
In the case where being supplied to multifunctional air Gm to route Lm, will provide the outside air As of flow as the air of sealing or
Cooling air and to the supply of 2 side of boiler.On the contrary, air feeder 5 connects via multifunctional air supply lines Lm
In the case where supply by multifunctional air Gm, reduce the amount of outside air As and as the air of sealing or cooling
Air and supplied to 2 side of boiler so that the total of multifunctional air Gm and outside air As becomes regulation flow.
In other words, multifunctional air supply lines Lm is connected to air feeder 5 as follows, even if via more
Purposes air supply lines Lm and to air feeder 5 supply multifunctional air Gm in the case where, can will also supply air
A is supplied to the inside of boiler 2, and the supply air A is by outside air As and flow and not via multifunctional air supply line
Road Lm and the multifunctional air that is supplied of air feeder 5 in the case where supplying multifunctional air Gm to air feeder 5
The identical multifunctional air Gm of the flow of Gm is constituted.For example, as shown in Figure 1A~Figure 1B, air feeder 5 and boiler 2 by
In the case where airline Ls connection, or, multifunctional air supply lines Lm is with air feeder 5 or for importing
The connection such as route (not shown) of outside air As, so that air feeder 5 be made to import in the only feelings of multifunctional air Gm
The outside air As of insufficient amount under condition, to generate the supply air A of regulation flow.
In general, in boiler system 1, according to the oxygen of the upstream side of the air preheater 3 in exhaust gas pumping-out line Le setting
91 (O of sensor2Sensor) etc. measured value, control FDF82 etc. equipment (machine) so that the inner air of boiler 2 than permanent
It is fixed.At this point, boiler 2 and air preheat in exhaust gas pumping-out line Le is arranged in lambda sensor 91 as shown in Figure 1A~Figure 1B
The case where the case where between device 3 is inferior, air ratio measured value includes the supply air A from air feeder 5 and calculates
Under, if the supply air A supplied from air feeder 5 to the inside of boiler 2 with via multifunctional air supply lines Lm and
The flow for the multifunctional air Gm being supplied to correspondingly increases, then air ratio correspondingly increases.Moreover, because influenced by this,
There are the air of boiler system 1 than constant control by unexpected a possibility that correcting.
However, air feeder 5 be not supplied to via multifunctional air supply lines Lm according to above structure
In the case where multifunctional air Gm, only to the inside of boiler 2 supply regulation flow outside air As, on the other hand, via
Multifunctional air supply lines Lm and in the case where being supplied to multifunctional air Gm, supply to the inside of boiler 2 by outside air
The air of the regulation flow same as described above of total composition of As and multifunctional air Gm.Thereby, it is possible to make lambda sensor
91 not by via multifunctional air supply lines Lm by multifunctional air Gm to the inside of boiler 2 supply and generate influenced,
Therefore the multifunctional air Gm supplied by air feeder 5 to the inside of boiler 2 can be made not to boiler system 1
Operating control has an impact.
It is specifically described using Fig. 2~Fig. 5 pairs of several embodiments relevant to present embodiment.Fig. 2 be for pair
It is illustrated involved in one embodiment of the utility model by controlling the transition for the air capacity distributed to each route
Figure, the case where multifunctional air supply lines Lm corresponding to Figure 1A is branched line Lf.Fig. 3 is for the utility model
An embodiment involved in by the figure that is illustrated to the behavior that the air capacity of each route is distributed of control, with Figure 1A
It is corresponding, it is different from the control content of Fig. 2 started in the initial state.Fig. 4 is for an implementation to the utility model
The figure being illustrated involved in mode by controlling the transition for the air capacity distributed to each route, corresponding to the multi-purpose of Figure 1B
Not the case where way air supply lines Lm is not branched line Lf.Fig. 5 is for involved by an embodiment to the utility model
And the figure being illustrated by control to the behavior that the air capacity of each route is distributed, it is corresponding with Figure 1B, but in initial shape
The control content started under state is different from Fig. 4.
It should be noted that in the case where multifunctional air supply lines Lm is branched line Lf, described in Fig. 2~Fig. 5
GAH be by air capacity include that the air (branch's hot-air) supplied via branched line Lf to air feeder 5 exists
The flow of the flow and combustion air G2 (auxiliary air) of interior hot-air Gh adds up to.Mill entrance air capacity be to
The flow for carrying air G1 (the hot-air Gh+ cold air Gb) that grinder 4 supplies.In addition, being set as in Fig. 2~Fig. 5
The case where state changes from state 0 according to number order is illustrated, but the transition of the state can also be according to control
Sequence and arbitrarily change.
Fig. 2~Fig. 3 using with multifunctional air supply lines Lm as the structure of Figure 1A in the case where branched line Lf
Premised on boiler system 1.
Embodiment shown in Fig. 2 is illustrated, in original state, that is, state 0, mill entrance or grinding machine are exported
The temperature carrying air G1 that is set as constant control (above-mentioned Mill air temperature control), will be supplied to grinder 4
(hot-air Gh+ cold air Gb) is set as constant control (above-mentioned mill entrance air capacity control), by the sky of the inside of boiler 2
Gas becomes effective than being set as constant control (above-mentioned air is than constant control) whole starting.Then, as shown in Fig. 2,
When state 0, hot-air Gh is 2, auxiliary air 2, the supply air A (regulation flow) from air feeder 5 are 1, is closed
It is calculated as the air flowing of 5 flow (total air).Then, in state 1, the moisture of the fuel F supplied to grinder 4 contains
Amount reduces.At this time, it may be necessary to the heat that the drying for reducing fuel F is required, therefore controlled by Mill air temperature, make to should be used as heat
The carrying of the slave PAF81 flowing of air Gh flowing is bypassed with a part of air G1 to the side circuitous Lb.In present embodiment
In, this is bypassed for 1 in 2 hot-air Gh to the side circuitous Lb, as a result, hot-air Gh becomes 1 from 2, cold air Gb
Become 1 from 0.Therefore, because cold air Gb increases and hot-air Gh is correspondingly reduced, therefore GAH from 4 is kept to 3 by air capacity.
Therefore, it in state 2, executes the GAH for restoring the reduction in state 1 and passes through the control of air capacity.It is specific and
Speech, hot-air Gh only have 1 to flow from branched line Lf to air feeder 5, but branch's hot-air is by air supply dress
It sets 5 and returns to the inside of boiler 2.It is measured as a result, than the position of the return position downstream by lambda sensor 91, from
And the air of the inside of boiler 2 changes than not, air is more unaffected than constant control, therefore total air does not become
Change.In addition, at this point, the amount that the flow of mill entrance air capacity and branch hot-air increases correspondingly is reduced, but in mill entrance
Restore mill entrance air capacity under air capacity control, total air is since air is more constant than constant control, result
It is that auxiliary air only reduces 1, and transfers back to primary air side.GAH does not restore to protect by air capacity in this case as a result,
Hold is 3.Then, in state 3,1 is further cut down from state 2 in order to make supply air A regulation flow.At this point,
Total air is constant by above-mentioned control with mill entrance air capacity, therefore as a result, auxiliary air only increases by 1, GAH
Restored from 3 to the 4 of original state by air capacity.
On the other hand, embodiment shown in Fig. 3 is illustrated, in original state, that is, state 0, above-mentioned grinding machine
Air temperature control, mill entrance air capacity control, air unstart more equal than constant control and it is invalid.Then, as shown in figure 3,
In original state, that is, state 0, hot-air Gh is 2, auxiliary air 2, supply air A are 1, adds up to 5 flow (total sky
Tolerance) air flowing.Then, in state 1, in the flow of hot-air Gh only 1 to branched line Lf branch.It supplies as a result,
2 are increased to from 1 to the flow of air A, mill entrance air capacity is reduced from 2 to 1.In the present embodiment, it is opened in state 2
The control of beginning mill entrance air capacity.Under the control of mill entrance air capacity, increase mill entrance air capacity in the side PAF81, thus
The flow of the carrying air G1 (hot-air Gh) flowed into grinder 4 restores to initial state value i.e. 2, another aspect, by
It is constantly flowed in branched line Lf in branch's hot-air, therefore GAH increases to 5 from the 4 of original state by air capacity, supplies
6 are increased to from 5 to air A.It should be noted that in the present embodiment, since in state 2, Mill air temperature controls nothing
Effect, therefore the aperture of quantity of hot air adjustment mechanism 71, cold air amount adjustment mechanism 72 does not change.That is, due to cold air amount
Adjustment mechanism 72 remains closing, therefore cold air Gb remains 0.
In addition, in the present embodiment, in state 3, starting the control of Mill air temperature.Later, due to the water of fuel F
Divide the reasons such as content reduction, if being more than original required mill entrance temperature or grinding machine outlet temperature, starts the Mill air
Temperature control, thus bypass of the beginning primary air to circuitous Lb.In the present embodiment, to circuitous Lb
Bypass amount be 1.Therefore, in state 3, the flow of cold air Gb becomes 1 from 0, and the flow of hot-air Gh correspondingly becomes from 2
1, therefore GAH returns to the 4 of original state from 5 by air capacity.In state 4, start air than constant control (total air
Control).In order to make total air return to the 5 of original state, the flow of auxiliary air is reduced.It should be noted that grinding machine
The flow for the primary air that device 4 supplies is constant by above-mentioned control.In state 5, as state 4 as a result, GAH
It is also fewer than original state by air capacity, therefore in order to restore GAH by air capacity, in order to make to supply air A regulation flow
And cut down, so that GAH be made to restore from 3 to the 4 of original state by air capacity.It should be noted that at this point, as sky
Gas is than constant control as a result, auxiliary air restores to 2.
In addition, Fig. 4 to Fig. 5 is to have the figure in the case where multifunctional air supply lines Lm is not branched line Lf
Premised on the boiler system 1 of the structure of 1B.
Embodiment shown in Fig. 4 is illustrated, in original state, that is, state 0, mill entrance or grinding machine are exported
The temperature carrying air G1 that is set as constant control (above-mentioned Mill air temperature control), will be supplied to grinder 4
(hot-air Gh+ cold air Gb) is set as constant control (above-mentioned mill entrance air capacity control), by the sky of the inside of boiler 2
Gas becomes effective than being set as constant control (above-mentioned air is than constant control) whole starting.Then, as shown in figure 4,
When state 0, cold air Gb is 0, hot-air Gh is 2, auxiliary air 2, be 0 by the multifunctional air Gm of heat exchanger 62,
The part that supply air A (regulation flow) from air feeder 5 be outside air As is 1, adds up to 5 flow (always
Air capacity) air flowing.Then, in state 1, the moisture content of the fuel F supplied to grinder 4 is reduced.At this point, needing
The required heat of the drying of fuel F is reduced, therefore is controlled by Mill air temperature, makes to should be used as hot-air Gh flowing
The carrying flowed from PAF81 is bypassed with a part of air G1 to the side circuitous Lb.In the present embodiment, this heat for being 2
1 in air Gh bypasses to the side circuitous Lb, as a result, hot-air Gh becomes 1 from 2, cold air Gb becomes 1 from 0.Cause
This, due to cold air Gb increase, hot-air Gh is correspondingly reduced, and GAH is kept to 3 from 4 by air capacity.
Therefore, in state 2, it is 1 that cold air Gb, which increases in state 1 from 0, therefore executes the GAH for being used for restoring to reduce 1
Pass through the control of air capacity.Specifically, multifunctional air Gm passes through multifunctional air supply lines Lm and heat exchanger 62
And only 1 flows to air feeder 5, reduces the temperature of hot-air Gh by the heat exchange with multifunctional air Gm.
Thereby, it is possible to be used in the heat of the drying of fuel F to reduce, therefore cold air Gb can return to 0 from 1, become cold air Gb
Carrying be all in air preheater 3 and flow with air G1, therefore returning hot-air Gh is 2, cold air Gb be 0 just
Beginning state 0.In addition, the multifunctional air Gm supplied to air feeder 5 returns to boiler 2 by air feeder 5
Inside, therefore multifunctional air Gm increases to 1 from 0, supply air A, which correspondingly increases from 1, becomes 2.
Wherein, the multifunctional air Gm supplied in state 2 to air feeder 5 returns to the inside of boiler 2, therefore
It is being measured than the position of recurrence position downstream by lambda sensor 91, so that the inner air of boiler 2 is than rising.Cause
This increases by 1 by the multifunctional air Gm of heat exchanger 62, needs the portion that will be supplied to boiler 2 by air than constant control
Divide and correspondingly reduce, it is constant that mill entrance air capacity is controlled by mill entrance air capacity, as a result, auxiliary air is only
It reduces 1 and becomes 1 from 2.Therefore, in state 2, hot-air Gh and the amount of cold air Gb reduction are accordingly increased, but due to two
Secondary air is reduced and is offseted with the increased amount, therefore GAH remains 3 by air capacity, does not recover to original state 0 also
4.Here, in state 3,1 is further cut down from state 2 in order to make supply air A regulation flow.At this point, total empty
Tolerance is constant by above-mentioned control with mill entrance air capacity, therefore as a result, auxiliary air only increases by 1, GAH passes through
Air capacity is restored from 3 to the 4 of original state.
On the other hand, embodiment shown in fig. 5 is illustrated, in original state, that is, state 0, above-mentioned grinding machine
Air temperature control, mill entrance air capacity control, air unstart more equal than constant control and it is invalid.Then, as shown in figure 5,
In original state, that is, state 0, cold air Gb is 0, hot-air Gh is 2, auxiliary air 2, from air feeder 5
Supplying the part that air A (regulation flow) is outside air As is 1, adds up to the air flowing of 5 flow (total air).
Then, in state 1, multifunctional air Gm is only to multifunctional air supply lines Lm flowing 1.The flow of air A is supplied as a result,
2 are increased to from 1, therefore total air also increases and becomes 6 from 5.In the present embodiment, in state 2, start mill entrance
Air capacity control, even if multifunctional air Gm is supplied via multifunctional air supply lines Lm to air feeder 5, grinding machine
The air capacity that the air capacity of the carrying air G1 of entrance will not change, therefore flow in each route does not become
Change.It should be noted that in state 2, since Mill air temperature controls still invalid, quantity of hot air adjustment mechanism
71, the aperture of cold air amount adjustment mechanism 72 does not change.That is, since cold air amount adjustment mechanism 72 remains closing, from
And cold air Gb remains 0.
In addition, starting the control of Mill air temperature in state 3.Later, due to reasons such as the moisture content reductions of fuel F
By starting Mill air temperature control, to open if being more than original required mill entrance temperature or grinding machine outlet temperature
Bypass of the initial portion primary air to circuitous Lb.However, in state 1, the temperature of hot-air Gh due to pass through
The heat exchange of multifunctional air Gm after heat exchanger 62 and reduce, therefore cold air Gb not from 0 increase.
In state 4, start air than constant control (control of total air).6 are increased to from 5 in state 1 as a result,
Total air return to the 5 of original state, but since mill entrance air capacity is controlled and constant by mill entrance air capacity,
The air capacity of primary air is constant, as a result, the flow of auxiliary air is reduced from 2 to 1.Therefore, the air of primary air
Amount becomes 2, and the air capacity of auxiliary air becomes 1, therefore GAH is reduced from 4 to 3 by air capacity.Therefore, in state 5, in order to
Restore GAH by air capacity, will supply air A from 2 cut down to 1 and become regulation flow.Total air only reduces 1 as a result, because
This auxiliary air only increases by 1 since air is controlled than constant control and mill entrance air capacity, as a result, GAH passes through
Air capacity is restored from 3 to the 4 of original state.
According to above structure, air feeder 5 be not supplied to multipurpose via multifunctional air supply lines Lm
In the case where air Gm, the outside air As of regulation flow is only supplied to the inside of boiler 2, on the other hand, via multipurpose
Air supply lines Lm and in the case where being supplied to multifunctional air Gm (being in figure 1A branch's hot-air), into boiler 2
Portion is supplied by the air of total regulation flow same as described above constituted of outside air As and multifunctional air Gm.That is,
Air feeder 5 makes external sky in the case where being supplied to multifunctional air Gm via multifunctional air supply lines Lm
The flow of gas and multifunctional air Gm is correspondingly reduced, so that the air for providing flow be supplied to the inside of boiler 2.As a result,
Lambda sensor 91 can be made not supplied multifunctional air Gm to the inside of boiler 2 by via multifunctional air supply lines Lm
And the influence generated, therefore the multifunctional air Gm supplied by air feeder 5 to the inside of boiler 2 can be made not right
The operating control of boiler system 1 has an impact.
Next, to control multipurpose flow rate adjusting mechanism 6m aperture multipurpose volume control device 12m (in Figure 1A
In, control the branch flow control device 12 of the aperture of branch flow adjustment mechanism 6) it is illustrated.
In several embodiments, as shown in Figure 1A~Figure 1B, above-mentioned boiler system 1 is also equipped with control multipurpose flow
The multipurpose volume control device 12m of the aperture of adjustment mechanism 6m.Multipurpose volume control device 12m is made of computer, tool
Memory (storage device) as standby CPU (not shown) (processor), ROM, RAM.Then, CPU is according to loading main memory saving
The order for the program (multipurpose flow control procedure) set and act (operations etc. of data), thus generate for controlling multipurpose
The instruction of the aperture of flow rate adjusting mechanism 6m executes aperture control by sending to multipurpose flow rate adjusting mechanism 6m.Specifically
For, or, it is confirmed whether to meet aftermentioned such control execution condition, and in the feelings for meeting control execution condition
So that the measured value of temperature survey mechanism 93 is become the mode of target value under condition, multipurpose flow tune is controlled by feedback control
The aperture of complete machine structure 6m.
It should be noted that multipurpose volume control device 12m is configured in the embodiment shown in Figure 1A~Figure 1B
Such as with execute control of quantity of hot air adjustment mechanism 71 and cold air amount adjustment mechanism 72 for having of boiler system 1 etc. its
He runs program on identical computer, but in other several embodiments, be also configured to run it is above-mentioned its
Isolated operation on other different computers of the computer of his program.
According to above structure, opening for multipurpose flow rate adjusting mechanism 6m is controlled by multipurpose volume control device 12m
Degree, is adjusted so as to the flow automatically to the multifunctional air Gm by multifunctional air supply lines Lm.
Also, the aperture of above-mentioned multipurpose flow rate adjusting mechanism 6m can also (control executes item according to various information
Part), it is adjusted by multipurpose volume control device 12m or artificial.
For example, in several embodiments, as shown in Figure 1A, boiler system 1 is also equipped in exhaust gas pumping-out line Le
Waste gas outlet temperature survey mechanism 94 that the outlet temperature of air preheater 3, that is, waste gas outlet temperature is detected (such as temperature
Meter).Also, above-mentioned multipurpose volume control device 12m controls multipurpose flow rate adjusting mechanism according to waste gas outlet temperature
The aperture of 6m.That is, (being in figure 1A branched line Lf by multifunctional air supply lines Lm.It is same as below) multipurpose it is empty
Gas Gm (is in figure 1A hot-air Gh.It is same as below) flow adjusted according to above-mentioned waste gas outlet temperature.Specifically,
It is to be set according to design temperature of subsequent equipment of air preheater 3 of exhaust gas pumping-out line Le etc. in waste gas outlet temperature
Predetermined temperature threshold value more than in the case where (waste gas outlet temperature >=temperature threshold), multipurpose flow rate adjusting mechanism 6m is set as
Opening state.At this point it is possible to be set as, according to the difference (difference) between waste gas outlet temperature and above-mentioned temperature threshold, difference
It is bigger and aperture is bigger.In contrast, (the waste gas outlet temperature in the case where waste gas outlet temperature is lower than above-mentioned temperature threshold
< temperature threshold), multipurpose flow rate adjusting mechanism 6m is set as closed state.
For example, if multifunctional air Gm is made to pass through multifunctional air supply lines when waste gas outlet temperature is higher than specified value
Lm, then in the conjunction in the downstream side that multifunctional air supply lines Lm is the circuitous Lb from carrying air supply lines L1
Between stream portion Ca and air preheater 3 in the case where the branched line Lf of branch, in the stream of entrance of grinder 4 etc. setting
The measured value of meter 92 becomes smaller.Since the flow of carrying air G1 is determined according to the amount of fuel F, increases and carry with empty
The flow of gas G1 is with the corresponding flow of the multifunctional air Gm for supplementing with being expelled to multifunctional air supply lines Lm.Then, example
Such as, if the flow of carrying air G1 increases due to FDF82, more carry passes through air preheater 3 with air G1,
Therefore it is capable of increasing the heat exchange amount with the heat of the exhaust gas Ge of air preheater 3, can reduce waste gas outlet temperature.Therefore,
It can be improved boiler efficiency, and can prevent to reduce load in order not to the design temperature more than subsequent equipment to operate
The situation of boiler 2 is able to carry out the operating of the good boiler 2 of efficiency.
In other several embodiments, multipurpose volume control device 12m is according to the fuel F supplied to grinder 4
Moisture content (amount of moisture etc. of Unit Weight) control the aperture of multipurpose flow rate adjusting mechanism 6m.That is, if the water of fuel F
Point content tails off, then in order to prevent due to carrying with the heat of air G1 cause fuel F drying excessively carry out so as to cause
Fire etc. needs to reduce the mill entrance temperature or grinding machine outlet temperature of carrying air G1, therefore such situation is according to moisture
Content judges.Also, in the case where needing to reduce mill entrance temperature or grinding machine outlet temperature, multipurpose flow is adjusted
Mechanism 6m is set as opening state.
For example, being defined amount of moisture reduction threshold in the reduction amount away from moisture content before in several embodiments
In the case that value is above (reduction amount of moisture content >=amount of moisture reduction threshold value), multipurpose flow rate adjusting mechanism 6m may be
Opening state.It in other implementations, is to be judged as to need to make multipurpose flow rate adjusting mechanism 6m to beat in moisture content
In the regulation amount of moisture threshold value situation below of open state (moisture content≤amount of moisture threshold value), multipurpose flow rate adjusting mechanism 6m
It may be opening state.At this point it is possible to be set as, according to the reduction amount of the moisture content of fuel F and above-mentioned amount of moisture reduction
Difference (difference) between threshold value, or according to the difference (difference) between moisture content and above-mentioned amount of moisture threshold value, difference is got over
It is big then aperture is bigger.On the contrary, in the case where the reduction amount of the moisture content of fuel F is lower than above-mentioned amount of moisture reduction threshold value
(the reduction amount < amount of moisture reduction threshold value of moisture content), or in the case where moisture content is more than above-mentioned amount of moisture threshold value
(moisture content > amount of moisture threshold value), is set as closed state for multipurpose flow rate adjusting mechanism 6m.It should be noted that fuel F
Moisture content according to the operatings of the data, the boiler system of real-time measurement 1 of measurements equal before fuel F is supplied to grinder 4
Data are obtained by calculating the hot material budget around grinder 4.
According to above structure, the aperture of multipurpose flow rate adjusting mechanism 6m is adjusted according to the moisture content of fuel F.That is,
If the moisture content of fuel F tails off, need to reduce the mill entrance temperature or grinding machine outlet temperature of carrying air G1, but this
The situation of sample judges according to the moisture content of fuel F.Also, for example, being flowed in circuitous Lb if will not adjust
The aperture of cold air amount adjustment mechanism 72 of flow of cold air Gb etc. increase and set multipurpose flow rate adjusting mechanism 6m
It is in an open state, then can not reduce the flow of the hot-air Gh preheated by air preheater 3, and reduce and supplied to grinder 4
To when carrying air G1 temperature.Therefore, can prevent the reduction of boiler efficiency, the downstream side of air preheater 3 it is useless
The temperature of gas Ge rises.
In other several embodiments, as shown in Figure 1A~Figure 1B, boiler system 1 has in above-mentioned quantity of hot air tune
The temperature measuring machine of at least one party's setting of the entrance and exit of complete machine structure 71, cold air amount adjustment mechanism 72 and grinder 4
Structure 93 and quantity of hot air adjustment mechanism 71 and cold air amount are determined according to temperature detected by temperature survey mechanism 93
The cold and hot aperture determination device 14 of the aperture of adjustment mechanism 72.Also, in the cold air that cold and hot aperture determination device 14 is determined
Measure adjustment mechanism 72 aperture i.e. determine aperture more than aperture threshold value in the case where, multipurpose volume control device 12m according to
Aperture is determined to control the aperture of multipurpose flow rate adjusting mechanism 6m.
Specifically, (aperture >=aperture threshold value is determined) in the case where determining that aperture is defined aperture threshold value or more,
The aperture of multipurpose flow rate adjusting mechanism 6m is set as opening state.At this point it is possible to be set as, opened according to decision aperture with above-mentioned
The difference (difference) between threshold value is spent, the more big then aperture of difference is bigger.On the contrary, determining aperture lower than above-mentioned aperture threshold value
In the case of (determine aperture < aperture threshold value), multipurpose flow rate adjusting mechanism 6m is set as closed state.For example, in several implementations
In mode, Ke Yiwei (determines aperture >=aperture threshold in the case where above-mentioned decision aperture is defined aperture threshold value or more
Value), the aperture of multipurpose flow rate adjusting mechanism 6m is set as opening state.In other several embodiments, Ke Yiwei, cold
From aperture (calculating the aperture before determining aperture) before, become larger the decision aperture of air amount adjustment device 72 defined open
(aperture >=aperture change threshold of aperture-before is determined) in the case where spending change threshold or more, and multipurpose flow is adjusted into machine
Structure 6m aperture is set as opening state.At this point it is possible to be, according to the difference (difference) or root determined between aperture and aperture threshold value
According to the difference (difference) between the difference and aperture change threshold for determining aperture and the aperture with before, the more big then aperture of difference
It is bigger.On the contrary, determining that aperture is lower than above-mentioned aperture threshold value, or determine the difference of aperture and the aperture with before lower than opening
(aperture < aperture threshold value is determined, or, determining the aperture < aperture change threshold between aperture -) in the case where spending change threshold,
Multipurpose flow rate adjusting mechanism 6m is set as closed state.Thereby, it is possible to avoid the aperture of cold air amount adjustment mechanism 72 from (determining
Aperture) become larger to be more than regulation.It should be noted that as long as above-mentioned aperture change threshold is 0 or more.
According to above structure, it is defined that the aperture (determining aperture) that can be avoided cold air amount adjustment mechanism 72, which becomes larger,
It is more than aperture threshold value.Also, in the above cases, since hot-air Gh is expelled to circuitous Lb, so as to reduce to
Carrying when grinder 4 the supplies temperature of air G1, can prevent being greatly lowered for boiler efficiency.
In other several embodiments, it can will be related to the above-mentioned reality of the aperture control of multipurpose flow rate adjusting mechanism 6m
Apply at least two control combinations of mode.It should be noted that above-mentioned temperature threshold, amount of moisture reduction threshold value, amount of moisture threshold
Value, aperture threshold value, aperture change threshold etc. are stored in the memory for having multipurpose volume control device 12m.
Hereinafter, having multifunctional air supply lines Lm and multipurpose flow rate adjusting mechanism 6m to above-mentioned using Fig. 6
The method of operation of the boiler system 1 of (being in figure 1A branched line Lf and branch flow adjustment mechanism 6) is illustrated.
Fig. 6 is method of operation (the multipurpose stream for showing boiler system 1 involved in an embodiment of the utility model
Measure adjustment mechanism 6m control method) flow chart.As shown in fig. 6, having: to whether meet including execute multipurpose flow tune
The monitoring step (S1~S2) that the control execution condition of at least one condition of the open and close control of complete machine structure 6m is monitored；And
The rate-determining steps (S3~S4) of the aperture of multipurpose flow rate adjusting mechanism 6m are controlled in the case where meeting control execution condition.It presses
The method of operation for the boiler system 1 for having above-mentioned steps is illustrated according to the execution sequence of the process of Fig. 6.It needs to illustrate
It is that the process of Fig. 6 can be executed by above-mentioned multipurpose flow rate adjusting mechanism 6m, it can also be by manually executing.Separately
Outside, the process of Fig. 6 is for example executed with defined period repeatedly.
In step S1~S2 of Fig. 6, above-mentioned monitoring step is executed.Specifically, in step sl, obtaining for supervising
Depending on information needed for control execution condition.In the embodiment shown in fig. 6, control execution condition includes: that above-mentioned exhaust gas goes out
Mouth temperature, the moisture content of fuel F, condition relevant to the decision aperture of cold air amount adjustment mechanism 72, but it is several at other
In embodiment, or wherein at least 1.It should be noted that in the embodiment shown in Figure 1A~Figure 1B, it can
Waste gas outlet temperature is measured using waste gas outlet temperature survey mechanism 94.The moisture content of fuel F receives in fuel F to grinding machine
The input of the data measured before the supply of device 4.In addition, the decision aperture of cold air amount adjustment mechanism 72 is by above-mentioned cold and hot
Aperture determination device 14 obtains.
In step s 2, for example, by reduction amount >=water of the moisture content of waste gas outlet temperature >=temperature threshold, fuel F
Divide reduction amount threshold value, moisture content≤amount of moisture the threshold value, { cold air of the decision aperture-of cold air amount adjustment mechanism 72 before
Measure the aperture of adjustment mechanism 72 } >=aperture change threshold, cold air amount adjustment mechanism 72 decision aperture >=aperture threshold value etc. make
For control execution condition, confirm whether any one of defined condition is true.
Then, in following step S3~S4, rate-determining steps are executed.Specifically, being judged as control in step s 2
In the case that execution condition processed is set up, in step s3, multipurpose flow rate adjusting mechanism 6m is set as opening state.At this point,
In the case that multipurpose flow rate adjusting mechanism 6m is in the open state, it is maintained open state.Also, it, can also according to situation
So that multipurpose flow rate adjusting mechanism 6m aperture is greater or lesser.On the contrary, be judged as in step s 2 control execution condition not at
In the case where vertical, in step s 4, multipurpose flow rate adjusting mechanism 6m is set as closed state.At this point, in multipurpose flow tune
In the case that complete machine structure 6m has been in close state, state is remained off.
The utility model is not limited to above embodiment, also include the mode that above embodiment is deformed or
Mode obtained from these appropriately combined modes.
Claims (7)
1. a kind of boiler system, which is characterized in that have:
It carries and uses air supply lines, be used to supply the carrying air for carrying fuel to boiler；
Exhaust gas pumping-out line, the exhaust gas for being used to generate the inside of the boiler due to the burning of the fuel is to outside
Discharge；
Air preheater is separately connected, for leading to carrying air supply lines and the exhaust gas pumping-out line
Cross the exhaust gas flowed in the exhaust gas pumping-out line and in the carrying described in being flowed in air supply lines
Carrying is preheated with air；
Circuitous connects the upstream side of the air preheater of the carrying in air supply lines and downstream side
It connects, for flowing the carrying air around the air preheater；
Grinder is set to the carrying air supply lines, the fuel powder for will supply to the boiler
It is broken；
Air feeder, it includes to the inside of the boiler supply sealing air seal gas feedway and to
At least one party in the cooling air feedway of the inside supply tempering air of the boiler；
Multifunctional air supply lines, from the carrying company in the circuitous downstream side in air supply lines
Branch between socket part and the air preheater, and connect with the air feeder；And
Multipurpose flow rate adjusting mechanism is set to the multifunctional air supply lines, can be in the multifunctional air
The flow of the multifunctional air flowed in supply lines is adjusted.
2. a kind of boiler system, which is characterized in that have:
It carries and uses air supply lines, be used to supply the carrying air for carrying fuel to boiler；
Exhaust gas pumping-out line, the exhaust gas for being used to generate the inside of the boiler due to the burning of the fuel is to outside
Discharge；
Air preheater is separately connected with carrying air supply lines and the exhaust gas pumping-out line, by
The exhaust gas that is flowed in the exhaust gas pumping-out line and in the carrying carrying flowed in air supply lines
It is preheated with air；
Circuitous connects the upstream side of the air preheater of the carrying in air supply lines and downstream side
It connects, for flowing the carrying air around the air preheater；
Grinder is set to the carrying air supply lines, the fuel powder for will supply to the boiler
It is broken；
Air feeder, it includes to the inside of the boiler supply sealing air seal gas feedway and to
At least one party of the cooling air feedway of the inside supply tempering air of the boiler；
Multifunctional air supply lines, be used to use as the sealing air or the tempering air is multi-purpose
Way air is supplied to the air feeder；
Multipurpose flow rate adjusting mechanism is set to the multifunctional air supply lines, can be in the multifunctional air
The flow of the multifunctional air flowed in supply lines is adjusted；And
Heat exchanger is used to carry out the connection in the circuitous downstream side in the carrying air supply lines
Heat exchange of the carrying air flowed between portion and the air preheater with the multifunctional air.
3. boiler system according to claim 1 or 2, which is characterized in that
The air feeder supplies the supply air for providing flow to the inside of the boiler, the confession of the regulation flow
It is supplied to air by the multifunctional air that is flowed in the multifunctional air supply lines and in the multifunctional air
At least one party of outside air other than the multifunctional air flowed in route is constituted.
4. boiler system according to claim 1 or 2, which is characterized in that
The boiler system is also equipped with the multipurpose flow control controlled the aperture of the multipurpose flow rate adjusting mechanism
Device.
5. boiler system according to claim 4, which is characterized in that
The boiler system, which is also equipped with, the outlet temperature i.e. exhaust gas of the air preheater in the exhaust gas pumping-out line
The waste gas outlet temperature survey mechanism that mouth temperature is detected,
The multipurpose volume control device controls the multipurpose flow rate adjusting mechanism according to the waste gas outlet temperature
Aperture.
6. boiler system according to claim 4, which is characterized in that
The multipurpose volume control device is according to the moisture content of the fuel supplied to the grinder to control
State the aperture of multipurpose flow rate adjusting mechanism.
7. boiler system according to claim 4, which is characterized in that have:
Quantity of hot air adjustment mechanism, be arranged in the downstream side of the air preheater the carrying air supply lines and
Between the circuitous interconnecting piece and the air preheater, it can be removed to as described in after air preheater preheating
It is adjusted with air, that is, hot-air flow；
Cold air amount adjustment mechanism, is set to the circuitous, can be to removing described in flowing in the circuitous
It is adjusted with the flow of air；
Temperature survey mechanism examines the temperature of at least one party in the outlet temperature and inlet temperature of the grinder
It surveys；And
Cold and hot aperture determination device determines the hot-air according to the temperature detected by the temperature survey mechanism
The aperture of adjustment mechanism and the cold air amount adjustment mechanism is measured,
The multipurpose volume control device adjusts machine according to the cold air amount that the cold and hot aperture determination device is determined
The aperture of structure is the aperture for determining aperture to control the multipurpose flow rate adjusting mechanism.
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| JP2017225059 | 2017-11-22 | ||
| JP2017-225059 | 2017-11-22 | ||
| JP2018033077A JP2019095174A (en) | 2017-11-22 | 2018-02-27 | Boiler system and operating method for boiler system |
| JP2018-033077 | 2018-02-27 |
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| CN110793057B (en) * | 2019-10-18 | 2024-01-30 | 华电电力科学研究院有限公司 | System and method for preventing blockage of air preheater of coal-fired power plant |
| KR102420600B1 (en) * | 2020-12-02 | 2022-07-14 | 두산에너빌리티 주식회사 | Hybrid power generation equipment and control method thereof |
| KR102397484B1 (en) * | 2020-10-30 | 2022-05-13 | 두산에너빌리티 주식회사 | Hybrid power generation equipment |
| US11391204B2 (en) | 2020-10-30 | 2022-07-19 | Doosan Heavy Industries & Construction Co., Ltd. | Hybrid power generation equipment |
| US11702964B2 (en) | 2020-10-30 | 2023-07-18 | Doosan Enerbility Co., Ltd. | Hybrid power generation equipment and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370009A (en) * | 1986-09-09 | 1988-03-30 | Babcock Hitachi Kk | Pulverized coal burning equipment |
| JPH07167426A (en) * | 1993-12-14 | 1995-07-04 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for controlling temperature of discharged gas at outlet of air preheater in boiler |
| JP2002106831A (en) * | 2000-09-28 | 2002-04-10 | Ishikawajima Harima Heavy Ind Co Ltd | Pulverized coal fired boiler facility |
| JP6605934B2 (en) * | 2015-12-02 | 2019-11-13 | 株式会社東芝 | Coal fired boiler and low-grade coal drying method |
-
2018
- 2018-02-27 JP JP2018033077A patent/JP2019095174A/en active Pending
- 2018-11-22 CN CN201821936920.4U patent/CN209295188U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019095174A (en) | 2019-06-20 |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Kanagawa Prefecture, Japan Patentee after: Mitsubishi Power Co.,Ltd. Address before: Kanagawa Prefecture, Japan Patentee before: MITSUBISHI HEAVY INDUSTRIES, Ltd. |
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| 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: 20190823 |