CN108884991A - The method of operation and boiler plant of boiler - Google Patents
The method of operation and boiler plant of boiler Download PDFInfo
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- CN108884991A CN108884991A CN201780023130.9A CN201780023130A CN108884991A CN 108884991 A CN108884991 A CN 108884991A CN 201780023130 A CN201780023130 A CN 201780023130A CN 108884991 A CN108884991 A CN 108884991A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
- Combustion Of Fluid Fuel (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Has following process：The process of specific surface area after obtaining the ashing of the containing ratio and many kinds of solids fuel of the ash content in many kinds of solids fuel；Specific surface area after containing ratio and ashing based on the respective ash content of many kinds of solids fuel obtained by acquirement process, specific surface area standard value after making the ashing of the mixture totality of many kinds of solids fuel is so to determine the process of the mixed proportion of many kinds of solids fuel.
Description
Technical field
The present invention relates to the method for operation of boiler and boiler plants.
Background technique
Such as the boiler for the solid fuel ignition for making coal etc., in general, such as has solid fuel is made by burner etc.
The stove of burning and in the stove arrangings multiple along the vertical direction and carry out the heat-transfer pipe of heat exchange.Such as in thermal power generation
In boiler used in factory etc., above-mentioned heat-transfer pipe has in the primary heating device, single reheat device and province's coal for being disposed in stove lower part
The lower heat transfer portion of heat exchange is carried out in device；With in the after-heater for being disposed in stove top, three times heater, final heating
The upper heat transfer portion of heat exchange is carried out in device and secondary reheater.
Among such boiler, such as in the pulverized coal boiler using coal as solid fuel, the combustion that is generated by burning of coal
It burns the ash content in gas to be attached to the furnace wall of stove and heat-transfer pipe and accumulate, causes slagging and incrustation to occur, to form ash
The case where adhesive layer.If such ash attachment occurs, the heat accumulation rate of the heat-transfer area of heat-transfer pipe is easy to be greatly reduced.In addition, if
It is attached to ash (lime-ash) gigantism of furnace wall, then can be fallen from furnace wall etc., the dramatically changing of furnace internal pressure, the damage of heat-transfer pipe, gas
The blocking etc. of body flow path is likely to occur.
Especially upper heat transfer portion, because having to be flowed between the heat-transfer pipe of the interval arranging narrower than lower heat transfer portion
It is dynamic, so that the burning gases of heat exchange are carried out, so, if ash is attached to upper heat transfer portion, dramatically changing for furnace internal pressure is gentle
The blocking of body flow path is easy to happen, and the steady running of boiler is hindered.In addition, in burner neighborhood, due to powder burning of coal
Flame radiation thermal conductivity causes the temperature of furnace wall neighborhood to get higher, therefore ash melting attachment has been easy on the heat-transfer pipe of relatively low temperature,
The heat accumulation rate of stove is easily reduced.
Go out a possibility that ash attachment occurs as index expression it is therefore proposed that having, inhibits grey attachment based on the index
The method of operation of the boiler of (No. 5342355 bulletin of Japan's patent).It is to be conceived to conduct in this existing method of operation
It is attached to the clinker of the ingredient of furnace wall and the nest of tubes that conducts heat, based on for the calculated clinker ratio of each solid fuel and ash component
Composition, determines the blending ratio of many kinds of solids fuel.Specifically, in the method for operation of existing boiler, so that ash is attached
The low mode of rate determine the standard value of clinker ratio, determine many kinds of solids and making clinker ratio be in the standard value or less
Thus the blending ratio of fuel inhibits the attachment of ash.
But in the method for operation of above-mentioned existing boiler, although the attachment of ash is suppressed, there is the heat accumulation of stove
The case where rate reduces.Thus, it is desirable to have a kind of new boiler method of operation that the heat accumulation rate for being able to suppress stove reduces.
Existing technical literature
Patent document
Patent document 1：No. 5342355 bulletin of Japan's patent
Summary of the invention
It is done the present invention is based on above-mentioned such situation, project is, provides a kind of heat accumulation rate for being able to suppress stove
The method of operation and boiler plant of reduced boiler.
The present inventors are conceived to, though be attached to it is grey identical in quality on heat-transfer pipe, because of solid fuel difference, heat accumulation rate
Reduced degree is also different, and is analyzed in detail the relationship of the reduction degree of solid fuel and heat accumulation rate, carries out sharp
The result confirmation of meaning research, specific surface area when being ashed solid fuel is bigger, and cavernous ash is adhered on heat-transfer pipe, stores up
The reduction of heating rate more becomes larger.Then, it based on the present inventors are recognized by this, finds so that the specific surface area after ashing is standard
It is worth mode below, determines the mixed proportion of many kinds of solids fuel, so as to inhibit the reduction of stove heat accumulation rate, holds boiler
Easily stablize and use, so that completing the present invention.
The invention done in order to solve the above problems is a kind of method of operation of boiler, which is characterized in that is that mixing is a variety of
Solid fuel and be allowed to the method for operation of boiler burnt, have：Obtain the containing ratio of the ash content in above-mentioned many kinds of solids fuel
The process of the specific surface area after ashing with above-mentioned many kinds of solids fuel；With it is above-mentioned a variety of based on being obtained by above-mentioned acquirement process
The containing ratio of the respective above-mentioned ash content of solid fuel and the specific surface area after above-mentioned ashing, make the mixing of above-mentioned many kinds of solids fuel
Specific surface area after the ashing of body totality is standard value hereinafter, so determining the work of the mixed proportion of above-mentioned many kinds of solids fuel
Sequence.
About the method for operation of the boiler, because having the containing ratio for obtaining the ash content in above-mentioned many kinds of solids fuel and upper
The process of specific surface area after stating the ashing of many kinds of solids fuel, and based on the above-mentioned many kinds of solids obtained by above-mentioned acquirement process
The containing ratio of the respective above-mentioned ash content of fuel and the specific surface area after above-mentioned ashing, keep the mixture of above-mentioned many kinds of solids fuel total
Specific surface area after the ashing of body is the process of standard value or less and the mixed proportion of determining above-mentioned many kinds of solids fuel, so energy
The specific surface area of enough ashes that will be generated by the burning of solid fuel is reduced to certain value hereinafter, to inhibit cavernous ash
Attachment to heat-transfer pipe.As a result, in the method for operation of the boiler, because the thermal insulation of attachment ash reduces, it is able to suppress fire
The reduction of furnace heat accumulation rate.
As above-mentioned standard value, preferably 5.5m2/g.In this way, by making above-mentioned standard value 5.5m2/ g, can more really
The reduction of ground inhibition stove heat accumulation rate.
Above-mentioned solid fuel can be coal.In the boiler that solid fuel is coal, it is particularly easy to that stove heat accumulation rate occurs
It reduces.Therefore, it is suitble to the method for operation of the boiler using the reduction for being able to suppress stove heat accumulation rate.
The method of operation of the boiler can be used for thermal power plant.In this way, by the way that the method for operation of the boiler is used for firepower
Power plant is able to suppress the reduction of stove heat accumulation rate, electric power is stably supplied.
In addition, in order to solve the above problems and another invention for doing is a kind of boiler plant, which is characterized in that be that mixing is more
It plants solid fuel and is allowed to the boiler plant to burn, have：It is supplied respectively to multiple mechanisms of different types of above-mentioned solid fuel；
Mix the mechanism of many kinds of solids fuel supplied from above-mentioned multiple feed mechanisms；It crushes by the mixed solid of above-mentioned mixed organization
The mechanism of fuel；Burn the boiler of the smashed solid fuel of above-mentioned disintegrating mechanism；It is respective based on above-mentioned many kinds of solids fuel
Specific surface area after the ashing of the containing ratio of ash content and above-mentioned many kinds of solids fuel keeps the mixture of above-mentioned many kinds of solids fuel total
Specific surface area after the ashing of body is the mechanism of standard value or less and the mixed proportion of determining above-mentioned many kinds of solids fuel；With to reach
To the mode of the mixed proportion of above-mentioned many kinds of solids fuel determined by above-mentioned determining mechanism, adjustment is imported from above-mentioned feed mechanism
The mechanism of the above-mentioned respective supply amount of many kinds of solids fuel of mixed organization.
The boiler plant, because having the specific surface area after the ashing for the mixture totality for making above-mentioned many kinds of solids fuel
Standard value is hereinafter, so determine the mechanism of the mixed proportion of above-mentioned many kinds of solids fuel, so being able to suppress cavernous ash
Attachment.The thermal insulation for adhering to ash as a result, reduces, because being able to suppress the reduction of stove heat accumulation rate through the boiler plant.
Here, so-called " containing ratio of ash content ", is the value of measurement according to JIS-M8812 (2006).In addition, so-called " ratio
Surface area " is the value of measurement according to JIS-Z8830 (2013).
As described above, the method for operation and boiler plant of boiler of the invention, is able to suppress the reduction of stove heat accumulation rate.
Detailed description of the invention
Fig. 1 is the concept map for indicating the boiler plant of one embodiment of the present invention.
Fig. 2 is flow chart the step of indicating the method for operation of the boiler of one embodiment of the present invention.
Fig. 3 is the diagram of the relationship of the specific surface area and stove heat accumulation rate after indicating the ashing of solid fuel.
Specific embodiment
Hereinafter, the embodiment of method of operation and boiler plant for boiler of the invention, is carried out with thermal power plant
Explanation.
Above-mentioned thermal power plant has the boiler plant, steam turbin generator equipment and condensate water work.
< boiler plant >
Boiler plant shown in FIG. 1 is mixing many kinds of solids fuel and is allowed to the boiler plant to burn.Boiler plant tool
Standby feed hopper 1, mixing machine 2, pulverizer 3, boiler 4, calculating machine 5 and regulating device for supply quantity 6.
(feed hopper)
Feed hopper 1 is supplied with the mechanism of solid fuel.In the boiler plant, has confession to supply many kinds of solids fuel
To multiple feed hoppers 1 of the mutually different solid fuel of type.Have the case where 2 feed hopper 1 in addition, being shown in Fig. 1,
But solid fuel is also possible to three kinds or more.In this case, it is identical number which, which has with the type of solid fuel,
The feed hopper 1 of amount.
Feed hopper 1 has the storage tank for storing above-mentioned solid fuel, can be from the leakage of the drop-bottom for the bottom for being located at the storage tank
The mouth of bucket type makes solid fuel fall and take out.
(mixing machine)
Mixing machine 2 is the mechanism for mixing the solid fuel supplied from above-mentioned feed hopper 1.As mixing machine 2, such as can make
With well known cylinder mixer etc..
(pulverizer)
Pulverizer 3 is crushed by the mechanism of the mixed solid fuel of mixing machine 2.As pulverizer 3, it is able to use well known
Vertical roller mill etc..
The partial size of smashed solid fuel is not particularly limited, such as can make 75 μm of solid fuels below of partial size
Ratio is crushed for 75 mass % or more, 90 mass % or less.
(boiler)
The solid fuel ignition that boiler 4 crushes above-mentioned pulverizer 3.Above-mentioned boiler 4 mainly have burner 7, stove,
Heat-transfer pipe and chimney.Above-mentioned boiler 4 utilizes burner 7, so that the solid fuel poured into together with air is burnt in stove, passes through
The heat-transfer pipe being largely arranged along the vertical direction in the stove carries out heat exchange.Above-mentioned heat-transfer pipe is supplied to by the heat exchange
Water supply is heated and pressed, and generates steam.In addition, the burning gases generated through burning are discharged from chimney.
Above-mentioned heat-transfer pipe, the temperature and pressure of steam as needed and suitably constitute, such as can be by constituting as follows：Match
It is located at the lower heat transfer portion for having primary heating device, single reheat device and economizer of stove lower part；It is disposed in stove top
Have after-heater, three times heater, the upper heat transfer portion of final heater and secondary reheater.Lower heat transfer portion is mainly pre-
For heat supply to the water supply of boiler 4, upper heat transfer portion mainly generates the steam of high temperature and pressure.In addition, reheater is by steamturbine etc.
The steam to be worked is reheated, manufacture makes the steam of reheat vapor cycle turbine rotation.In addition, economizer is to be discharged
Burning gases heat, the water supply of boiler 4 is preheated.
(calculating machine)
Calculating machine 5 is the mechanism of the mixed proportion of determining above-mentioned many kinds of solids fuel.Specifically, based on above-mentioned a variety of solid
Specific surface area after the ashing of the containing ratio of the respective ash content of fluid fuel and above-mentioned many kinds of solids fuel (hereinafter simply referred to as compares table
Area), specific surface area standard value after making the above-mentioned ashing in the ash content of the mixture totality of above-mentioned many kinds of solids fuel with
Under, so determine the mixed proportion of above-mentioned many kinds of solids fuel.
Calculating machine 5 is determined process (S2) by the mixed proportion of the method for operation of aftermentioned boiler, calculates many kinds of solids combustion
The mixed proportion of material.In addition, calculating machine 5, which is based on calculated mixed proportion, controls regulating device for supply quantity 6.
(regulating device for supply quantity)
Regulating device for supply quantity 6 is the mixed proportion to reach above-mentioned many kinds of solids fuel determined by above-mentioned calculating machine 5
Mode come adjust from above-mentioned feed hopper 1 import mixing machine 2 the above-mentioned respective supply amount of many kinds of solids fuel mechanism.Also
To say, which has the regulating device for supply quantity 6 that total type with solid fuel is equivalent amount, from it is solid
The type of fluid fuel is connected in the piping of mixing machine 2 for each feed hopper 1 of identical quantity respectively 1.The supply amount
Adjustment device 6 is not particularly limited, such as is able to use the chain-linked conveyer that solid fuel is carried from feed hopper 1 to mixing machine 2.
In this case, the adjustment of supply amount carries out by adjusting the movement speed of conveyer.
The method of operation > of < boiler
The step of display has used the method for operation of boiler of the boiler plant in Fig. 2.The method of operation of the boiler is mixed
It closes many kinds of solids fuel and is allowed to the method for operation of boiler burnt.The method of operation of the boiler has：It obtains above-mentioned a variety of solid
Process (the S1 of specific surface area after the ashing of the containing ratio of ash content in fluid fuel and above-mentioned many kinds of solids fuel：Obtain work
Sequence)；Based on the containing ratio of the respective above-mentioned ash content of above-mentioned many kinds of solids fuel acquired by above-mentioned acquirement process and above-mentioned compare table
Area makes the above-mentioned specific surface area standard value in the ash content of the mixture totality of above-mentioned many kinds of solids fuel or less and determines
State the process (S2 of the mixed proportion of many kinds of solids fuel：Mixed proportion determines process)；With based on determining above-mentioned mixed proportion,
Process (the S3 for carrying out the mixing of above-mentioned many kinds of solids fuel and being supplied to stove：Mix supply step).
The solid fuel of method of operation for the boiler is just not particularly limited if it is fuel used in boiler,
Such as coal, sludge carbide, bio-fuel can be enumerated etc..Wherein, preferably thermal discharge is big, suitable for thermal power plant etc.
Coal.
The type of above-mentioned coal is not particularly limited.In the method for operation of the boiler, because marking above-mentioned specific surface area
Quasi- value is following and determines the mixed proportion of above-mentioned many kinds of solids fuel, occurs so being able to suppress because of the attachment of cavernous ash
Stove heat accumulation rate reduction.In short, in the method for operation of the boiler because specific surface area is bigger, be easy to store up stove
The solid fuel that heating rate reduces, and specific surface area is smaller, the solid fuel that is difficult to make stove heat accumulation rate to reduce is used in mixed way, institute
To be able to suppress the reduction of stove heat accumulation rate.
Therefore, in the method for operation of the boiler, can by bigger coal of specific surface area etc. as solid fuel one
Part uses.Make the bigger coal of this such specific surface area, such as anthracite, bituminous coal can be enumerated, ub-bituminous coal, lignite, height
Silicon coal, high calcium coal etc..
(obtaining process)
In obtaining process (S1), the containing ratio and above-mentioned many kinds of solids fuel of the respective ash content of many kinds of solids fuel are obtained
Ashing after specific surface area.In addition, the containing ratio of the above-mentioned ash content in the acquirement process and the specific surface area after above-mentioned ashing
Acquirement, it is not necessary to carry out the analysis of solid fuel, can also from storage device etc. referring to or operator input in advance measurement
Ash content containing ratio and the specific surface area after ashing.
The measurement method of containing ratio as the respective ash content of solid fuel, is not particularly limited, for example, be able to use according to
According to the measurement method of (2006) JIS-M8812.In addition, the containing ratio of ash content, is that identical base value is with aftermentioned mixed proportion
Can, it can be butt, be also possible to wet basis, but the easy butt of calculating of preferably mixing ratio.
In addition, the measurement method as above-mentioned specific surface area, for example can be allowed to ashing simultaneously with electric furnace etc. for solid fuel
As sample, measured using the BET method according to JIS-Z8830 (2013).In order to reduce measurement error, for measurement
It is preferable to use with the fuel for having generally equalized size distribution when using as fuel (when burning) for solid fuel.Therefore,
When being crushed after mixing many kinds of solids fuel, each solid fuel equally crushed is preferably made to be ashed and measure specific surface area.
In addition, other than the measurement of above-mentioned ash content, it is each solid fuel can also to be obtained in advance in obtaining process (S1)
From thermal discharge measured value.The respective thermal discharge of solid fuel is so obtained in advance, in aftermentioned mixing supply step (S3)
In, it is easy the supply amount for making the heat for the mixed solid fuel for putting into boiler adjust solid fuel as desired amount, because
This can expeditiously carry out the operating of boiler.Here, the thermal discharge of so-called solid fuel, is for example followed according to JIS-M8814
(2003) measurement method makes solid fuel ignition and the value that measures.
In addition, the containing ratio of the respective ash content of solid fuel, above-mentioned specific surface area and thermal discharge of solid fuel etc., preferably
It is stored among such as storage device as data are pre-recorded.Data are so kept in advance, can utilize the number afterwards
According to.
(mixed proportion determines process)
It is determined in process (S2) in mixed proportion, respectively based on above-mentioned many kinds of solids fuel acquired by above-mentioned acquirement process
Above-mentioned ash content containing ratio and above-mentioned specific surface area, make above-mentioned in the ash content of the mixture totality of above-mentioned many kinds of solids fuel
Specific surface area is the mixed proportion of standard value or less and determining above-mentioned many kinds of solids fuel.The process by the boiler plant operation
Machine 5 carries out.
If the quality containing ratio of the ash content of each solid fuel is Wi, the specific surface area after the ashing of each solid fuel is Si,
When the mass ratio of mixture totality relative to each solid fuel is Xi, the specific surface area S after the ashing of mixture totality, energy
It is enough to be calculated by following formula (1).In addition, the unit of above-mentioned ash content containing ratio Wi, specific surface area Si and mass ratio Xi are united in fuel room
One, as shown in following formula (1), the unit of the specific surface area S of mixture totality, the specific surface area Si with each solid fuel is phase
Same unit.
[formula 1]
It is determined in process (S2) in mixed proportion, makes above-mentioned specific surface area S standard value hereinafter, so determining above-mentioned a variety of
The mixed proportion of solid fuel.The method of operation of the boiler, by making above-mentioned specific surface area S standard value hereinafter, being able to suppress
The reduction of stove heat accumulation rate.
Above-mentioned specific surface area S be by solid fuel burning and generate ash the porosity scale.The porosity is big
Cavernous ash is considered being attached to the heat-transfer pipe of boiler and hindering to conduct heat, and makes the reduction of stove heat accumulation rate.Therefore, if made
Stating specific surface area S is standard value hereinafter, then the porosity of attachment ash becomes smaller, and thermal insulation is lowered, therefore, it is considered that being able to suppress
The reduction of stove heat accumulation rate.
The standard value of the specific surface area S of solid fuel as above-mentioned coal blending, preferably 5.5m2/ g, more preferably 5.0m2/
G, further preferably 4.7m2/ g, particularly preferably 4.5m2/g.When keeping above-mentioned standard value bigger than above-mentioned value, stove heat accumulation rate mistake
It is fallen under degree, it is therefore possible to cannot sufficiently inhibit the reduction of stove heat accumulation rate.
On the other hand, the lower limit as the specific surface area S of the solid fuel of above-mentioned coal blending, preferably 2.5m2/ g, more preferably
For 2.8m2/ g, further preferably 3.0m2/g.Specific surface area S be lower than above-mentioned lower limit when because the solid fuel being able to use by
Limit, so fuel cost is possible to unnecessarily increase.
(mixing supply step)
In mixing supply step (S3), process (S2) determining above-mentioned mixing ratio is determined based on by above-mentioned mixed proportion
Example, mixes above-mentioned many kinds of solids fuel, the supply to stove is carried out after crushing.Specifically, by the calculating machine of the boiler plant 5
Regulating device for supply quantity 6 is controlled, the amount of the solid fuel sent from feed hopper 1 to mixing machine 2 is adjusted separately.Mixed solid combustion
Material is filled into boiler 4 and is burned together with air after being crushed by pulverizer 3.
(advantage)
The method of operation of the boiler determines many kinds of solids fuel because above-mentioned specific surface area S standard value or less is made
Mixed proportion so attachment ash is lowered the thermal insulation of heat-transfer pipe, therefore is able to suppress the reduction of stove heat accumulation rate.
< steam turbin generator equipment >
Steam turbin generator equipment, mainly has steamturbine and generator.
Above-mentioned steamturbine is the energy for possessing steam, is converted into the outer of rotary motion via turbine (impeller) and axis
Combustion engine, by boiler plant steam drive generated.
Above-mentioned steamturbine is not particularly limited, such as can be by high temperature and pressure turbine, high temperature reheat turbine and low pressure whirlpool
Wheel is constituted.At this moment, boiler plant steam generated, first driving high temperature and pressure turbine.Pass through the drive of high temperature and pressure turbine
It is dynamic, the steam of its energy and temperature and pressure decline is lost, is heated again by the reheater of the boiler plant.Using by the reheating
The high-temperature steam of device heating, high temperature reheat turbine are driven.In addition, by the driving of high temperature reheat turbine, lose its energy and
The steam of temperature and pressure decline is directed to condensate water work after driving low-pressure turbine.
By the steam-powered high temperature and pressure turbine, the power drive generator of high temperature reheat turbine and low-pressure turbine, obtain
To electric output power.
< condensate water work >
Condensate water work mainly has cryophorus, pump, heater and degasser.
In condensate water work, by the steam of the cooling driving steamturbine of cryophorus, as condensing hot air furnace.The condensation
Water is pressurizeed by pump, is heated by heater, is degassed device degassing.The condensed water of the pressurization and heating, as giving for the boiler plant
Water is fed into the economizer of the boiler plant.
< advantage >
Using the thermal power plant of the boiler plant, because stove heat accumulation rate is difficult using the method for operation of the boiler
To reduce.Therefore, the thermal power plant of the boiler plant has been used, has been easy to stablize and use.
[other embodiments]
Above embodiment does not limit composition of the invention.Therefore, above embodiment, description based on this specification and
Common technical knowledge can be omitted, replaced or be added to the constituent element of above embodiment each section, these should all be solved
It is interpreted as belonging to the scope of the present invention.
The method of operation of the boiler plant and the boiler plant is readily applicable to boiler used other than thermal power plant
Equipment.
In addition, the composition of boiler can also be different from the embodiment described above in the boiler plant.
Embodiment
Hereinafter, the present invention is described in more detail by embodiment, but the present invention is not limited by these embodiments.
(solid fuel)
Firstly, solid fuel prepares three kinds of coals, a small amount of sampling respectively measures the containing ratio of ash content and above-mentioned in the ash content
Specific surface area after ashing.In addition, the containing ratio of pit ash, is carried out by the measurement method according to JIS-M8812 (2006)
Measurement, calculates the value of wet basis.In addition, specific surface area is measured according to JIS-Z8830 (2013).It is as the result is shown in table 1.
[table 1]
(No.1~No.7)
Then, using two or three of coal among these three coals, the mixed of the coal of No.1~No.7 shown in table 2 is selected
Composition and division in a proportion example (wet basis), the specific surface area after calculating ashing.In addition, using the coal blending for mixing coal as the mixed proportion of table 2,
With the firepower boiler regular period in the thermal power plant of generated energy 700MW, the flat of the stove heat accumulation rate in this period is acquired
Mean value.As the result is shown in table 2.
[table 2]
It is to be converted into ratio relative to the stove heat accumulation rate of No.1 and standardized in addition, the stove heat accumulation rate in table 2
Value.
In addition, in Fig. 3 graphic representation table 2 result.As shown, no matter the type of mixed coal, the specific surface area of ash content
It is all highly relevant with stove heat accumulation rate, it is known that make specific surface area standard value hereinafter, being able to suppress the reduction of stove heat accumulation rate.
In addition, the specific surface area in ash content is 5.5m2/ g No.1~No.6 below, stove heat accumulation rate are higher than 0.95,
In contrast, specific surface area is higher than 5.5m2In the No.7 of/g, stove heat accumulation rate is lower than 0.95.It follows that making specific surface area
Standard value is 5.5m2/ g can obtain 0.95 or more high stove heat accumulation rate.
It illustrates the present invention in detail and referring to specific embodiment, but can add being detached from the spirit and scope of the present invention
With various changes and modifications, this will be apparent that for a person skilled in the art.
The application is existed based on Japanese patent application (Patent 2016-083884), content filed on April 19th, 2016
This is incorporated into as reference.
Industrial availability
As described above, the method for operation of boiler of the invention is able to suppress the reduction of stove heat accumulation rate.Therefore, it uses
The boiler plant of the method for operation of the boiler is easy to stablize and use.In addition, being suitble to use using the boiler of the method for operation of the boiler
In thermal power plant.
The explanation of symbol
1 feed hopper
2 mixing machines
3 pulverizers
4 boilers
5 calculating machine
6 regulating device for supply quantity
7 burners
S1 obtains process
S2 mixed proportion determines process
S3 mixes supply step
Claims (5)
1. a kind of method of operation of boiler, which is characterized in that be the operating side for mixing many kinds of solids fuel and being allowed to the boiler to burn
Method, including：
Specific surface area after obtaining the ashing of the containing ratio and above-mentioned many kinds of solids fuel of the ash content in above-mentioned many kinds of solids fuel
Process；With
Based on the containing ratio of the respective above-mentioned ash content of above-mentioned many kinds of solids fuel and above-mentioned ashing acquired by above-mentioned acquirement process
Specific surface area afterwards, the specific surface area standard value after making the ashing of the mixture totality of above-mentioned many kinds of solids fuel is hereinafter, such as
This determines the process of the mixed proportion of above-mentioned many kinds of solids fuel.
2. the method for operation of boiler according to claim 1, wherein above-mentioned standard value is 5.5m2/g。
3. according to claim 1 or the method for operation of boiler as claimed in claim 2, wherein above-mentioned solid fuel is coal.
4. the method for operation of boiler according to claim 1, is used for thermal power plant.
5. a kind of boiler plant, which is characterized in that be that mixing many kinds of solids fuel is allowed to the boiler plant to burn, have：
It is supplied respectively to multiple mechanisms of different types of above-mentioned solid fuel；
Mix the mechanism of many kinds of solids fuel supplied from above-mentioned multiple feed mechanisms；
Crush the mechanism by the mixed solid fuel of above-mentioned mixed organization；
The boiler to burn by the smashed solid fuel of above-mentioned disintegrating mechanism；
Containing ratio based on the above-mentioned respective ash content of many kinds of solids fuel and the specific surface after the ashing of above-mentioned many kinds of solids fuel
Product, the specific surface area standard value after making the ashing of the mixture totality of above-mentioned many kinds of solids fuel is hereinafter, so determine above-mentioned
The mechanism of the mixed proportion of many kinds of solids fuel；With
In a manner of becoming the mixed proportion of above-mentioned many kinds of solids fuel determined by above-mentioned determining mechanism, adjust from above-mentioned supply
Mechanism imported into the mechanism of the above-mentioned respective supply amount of many kinds of solids fuel of mixed organization.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016083884A JP6577407B2 (en) | 2016-04-19 | 2016-04-19 | Boiler operation method and boiler equipment |
| JP2016-083884 | 2016-04-19 | ||
| PCT/JP2017/014921 WO2017183529A1 (en) | 2016-04-19 | 2017-04-12 | Method for operating boiler and boiler equipment |
Publications (2)
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| JP7471893B2 (en) | 2020-03-31 | 2024-04-22 | Ｕｂｅ三菱セメント株式会社 | Method and apparatus for reforming coal ash |
| JP7415894B2 (en) | 2020-11-27 | 2024-01-17 | Ｊｆｅエンジニアリング株式会社 | Fossil fuel alternative fuel transportation system |
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| JP2017194207A (en) | 2017-10-26 |
| CN108884991B (en) | 2020-09-25 |
| WO2017183529A1 (en) | 2017-10-26 |
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