CN117267746A - Method and system for stably and efficiently burning sugarcane leaves in bagasse boiler - Google Patents
Method and system for stably and efficiently burning sugarcane leaves in bagasse boiler Download PDFInfo
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- CN117267746A CN117267746A CN202311396365.6A CN202311396365A CN117267746A CN 117267746 A CN117267746 A CN 117267746A CN 202311396365 A CN202311396365 A CN 202311396365A CN 117267746 A CN117267746 A CN 117267746A
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- 240000000111 Saccharum officinarum Species 0.000 title claims abstract description 177
- 235000007201 Saccharum officinarum Nutrition 0.000 title claims abstract description 177
- 239000010905 bagasse Substances 0.000 title claims abstract description 175
- 241000609240 Ambelania acida Species 0.000 title claims abstract description 173
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000012634 fragment Substances 0.000 claims abstract description 72
- 239000000446 fuel Substances 0.000 claims abstract description 67
- 239000002245 particle Substances 0.000 claims abstract description 61
- 238000002485 combustion reaction Methods 0.000 claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 241000196324 Embryophyta Species 0.000 claims description 46
- 239000002893 slag Substances 0.000 claims description 26
- 238000004364 calculation method Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 5
- 235000000346 sugar Nutrition 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000029087 digestion Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010344 co-firing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 235000021552 granulated sugar Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009275 open burning Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/50—Blending
- F23K2201/501—Blending with other fuels or combustible waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/10—Supply line fittings
- F23K2203/104—Metering devices
Abstract
The invention belongs to the technical field of boiler combustion, and particularly discloses a method and a system for stably and efficiently combusting sugarcane leaves in a bagasse boiler. The method comprises the following steps: (1) Calculating the upper limit average length of the sugarcane leaf fragments according to the average length of the bagasse particles and the set burnout rate of the sugarcane She Hunran(2) Crushing sugarcane leaves to an average length less than(3) Calculating the blending ratio k of the bagasse fragments according to the load of the bagasse boiler and the detected base moisture received by the bagasse and the base moisture received by the bagasse leaves; (4) Mixing the sugarcane leaf fragments and the bagasse particles according to the blending proportion k to obtain a mixed fuel; and (5) feeding the mixed fuel into a bagasse boiler for combustion. The system comprises sugarcaneLeaf crushing module, sugarcane leaf transmission module, sugarcane squeeze module, bagasse transmission module, compounding module, fuel transmission module and feed module. The method and the system can realize the purpose of stable and efficient mixed combustion of the bagasse in the boiler on the premise of not modifying the bagasse boiler structure.
Description
[ field of technology ]
The invention relates to the technical field of boiler combustion, in particular to a method and a system for stably and efficiently combusting sugarcane leaves in a bagasse boiler.
[ background Art ]
Sugarcane leaves are byproducts of the sugarcane growing process, and a large amount of waste sugarcane leaves are left after the sugarcane is harvested every year. According to the environmental protection requirement, in order to reduce the atmospheric pollution, the country strictly forbids the open burning of the sugarcane leaves, so that deep processing and digestion are required to be carried out on the sugarcane leaves, the comprehensive utilization is realized, the waste is changed into valuable, and the economic benefit and the environmental protection benefit are improved.
The existing method for realizing rapid digestion of a large amount of sugarcane leaves is to burn by a bagasse boiler of a sugar-making enterprise, but the designed fuel of the existing bagasse boiler is bagasse, and the components, moisture, physical properties, granularity and the like of the sugarcane leaves and the bagasse have great differences, so that the combustion characteristics are greatly different, and the conditions required by combustion are greatly different. Therefore, if the sugarcane leaves and the bagasse are simply mixed and put into the existing bagasse boiler for combustion, the bagasse boiler is unstable in combustion and low in combustion efficiency, so that the combustion energy consumption and the risk of the bagasse boiler are increased.
[ invention ]
The invention aims at: aiming at the problems, the method and the system for stably and efficiently burning the sugarcane leaves in the bagasse boiler are provided. By the method and the system, the stable and efficient blending combustion of the sugarcane leaves and the bagasse in the bagasse boiler can be realized without technical transformation of the existing bagasse boiler structure, so that the efficient and environment-friendly digestion of the sugarcane leaves is realized, the emission of pollutants is reduced, the fuel cost of sugar enterprises is reduced, and the economic benefit of the enterprises is increased.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method of stable and efficient combustion of sugar cane leaves in a bagasse boiler, the method comprising the steps of:
(1) Measuring and calculating the average length of bagasse particlesSetting the burnout rate w of the sugarcane top fragments in the stage of mixing combustion with bagasse particles; according to the->And w, calculating the upper limit average length of sugarcane top pieces +.>The calculation formula is as follows:
in the method, in the process of the invention,is the upper average length of sugarcane leaf fragments, </i >>The average length of the bagasse particles is w is the burnout rate of the sugarcane leaf fragments in the stage of mixing combustion with the bagasse particles, namely the proportion of the total combustion mass of the sugarcane leaf fragments to the mass of the sugarcane leaf fragments entering the furnace;
(2) According to the calculation resultCrushing sugarcane leaves until the average length is less than +.>Obtaining sugarcane leaf fragments;
(3) Detection of bagasse particlesIs subjected to the water content M Slag of And the received base moisture M of the sugarcane leaf fragments Leaves of the plant Meanwhile, according to the load stabilization requirement of the bagasse boiler, determining a load change coefficient m of the bagasse boiler; according to the obtained M Slag of 、M Leaves of the plant And m, calculating the upper limit blending ratio k of the sugarcane leaf fragments, wherein the calculation formula is as follows:
wherein k is the upper limit blending ratio of the sugarcane leaf fragments, namely the sugarcane leaf fragments account for the volume fraction of the mixed fuel, and the mixed fuel is obtained by mixing the sugarcane leaf fragments and bagasse particles; m is the load change coefficient of the bagasse boiler, namely the proportion of the bagasse boiler load for burning the mixed fuel to the bagasse boiler load for burning only bagasse particles originally; m is M Slag of The bagasse particles receive the base moisture; m is M Leaves of the plant The received base moisture for sugarcane leaf fragments;
(4) Uniformly mixing the sugarcane top fragments and the bagasse particles according to a proportion lower than an upper limit blending combustion proportion k to obtain a mixed fuel;
(5) And sending the obtained mixed fuel into a bagasse boiler for combustion.
Further, in the step (2), the standard deviation of the length of the sugarcane leaf fragments is smaller than the standard deviation sigma of the upper limit length thereof Leaves of the plant ，σ Leaves of the plant The calculation formula of (2) is as follows:
σ leaves of the plant ＝σ Slag of (1/w)
In sigma Leaves of the plant Is the standard deviation of the upper limit length sigma of the sugarcane leaf fragments Slag of Is the standard deviation of the length of bagasse particles.
Further, in step (2), the length variation coefficient of the sugarcane top chip is smaller than the upper limit length variation coefficient CV Leaves of the plant ，CV Leaves of the plant The calculation formula of (2) is as follows:
CV leaves of the plant ＝CV Slag of (1/w)
In CV Leaves of the plant Is the upper limit length variation coefficient, CV, of sugarcane leaf fragments Slag of Is the length variation coefficient of bagasse particles.
The invention also provides a system for stable and efficient combustion of sugarcane leaves in a bagasse boiler, which comprises:
the sugarcane leaf crushing module is used for crushing sugarcane leaves until the average length of fragments of the sugarcane leaves meets a preset value to obtain sugarcane leaf fragments;
the sugarcane leaf transmission module is used for transmitting the sugarcane leaf fragments at a set transmission speed;
the sugarcane squeezing module is used for squeezing sugarcane juice in sugarcane and separating out bagasse particles;
the bagasse conveying module is used for conveying the obtained bagasse particles at a set conveying speed;
the mixing module is used for receiving the sugarcane leaf fragments transmitted from the sugarcane leaf transmission module and the bagasse particles transmitted from the bagasse transmission module, and uniformly stirring and mixing the received sugarcane leaf fragments and the bagasse particles to obtain mixed fuel;
the fuel transmission module is used for transmitting the mixed fuel to a feeding module of the bagasse boiler;
and the feeding module is used for receiving the mixed fuel transmitted by the fuel transmission module and quantitatively feeding the mixed fuel into a hearth of the bagasse boiler for combustion through hot air.
The invention has the following beneficial effects:
according to the invention, the crushing degree of the sugarcane leaves is controlled, so that the crushed sugarcane leaf fragments and bagasse particles can be suspended in the bagasse boiler together, meanwhile, the actual production process changes the load of the existing boiler, and the blending ratio of the sugarcane leaves is determined, so that the sugarcane leaves and the bagasse can be basically synchronous in terms of the burning speed and the burnout rate, and further, the stable and efficient blending combustion of the sugarcane leaves and the bagasse in the bagasse boiler is realized, the technical transformation of the existing bagasse boiler is not needed, the efficient and environment-friendly digestion of the sugarcane leaves is realized, the emission of pollutants is reduced, the fuel cost of sugar enterprises is reduced, and the economic benefits of the enterprises are increased.
[ description of the drawings ]
FIG. 1 is a flow chart of the implementation of the method of the present invention.
Fig. 2 is a schematic diagram of the composition of the system of the present invention.
Description of the main reference signs
In the figure, a 1-sugarcane leaf crushing module, a 2-sugarcane leaf transmission module, a 3-sugarcane squeezing module, a 4-bagasse transmission module, a 5-mixing module, a 6-fuel transmission module, a 7-feeding module and a hearth of an 8-bagasse boiler are shown.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
[ detailed description ] of the invention
The invention will be further illustrated with reference to specific examples.
Example 1
The bagasse boiler is designed with bagasse as fuel, and bagasse particles are burned in a suspended state in a hearth of the bagasse boiler, so that when the bagasse is mixed with and burned with the sugarcane leaves, the sugarcane leaves are required to be synchronously burned with the bagasse in a suspended state for realizing efficient and stable combustion. Although the finer the sugarcane leaves are, the easier the sugarcane leaves are burnt, but the finer the sugarcane leaves are, the higher the economic cost is, so that the sugarcane leaves can be suspended together with bagasse as long as the sugarcane leaves are crushed, meanwhile, the components of the sugarcane leaves and the bagasse are not greatly different, and the synchronous combustion is realized at the combustion speed and the burnout rate, namely the efficient and economic blending combustion is realized. And reflects that the sugarcane leaf crushing index is mainly the length average value of the sugarcane leaf.
The inventor finds that the particle distribution of both sugarcane leaves and bagasse accords with the chi-square distribution through multiple sampling measurement statistics. Based on the above, the inventor obtains that the common suspension of the sugarcane leaves and the sugarcane is realized according to a plurality of fluidization suspension tests of the sugarcane leaves and the sugarcane bagasse particles, the average length of the sugarcane leaves is smaller than the upper limit average length, and the upper limit average lengthBased on the average length of bagasse +.>The calculation is carried out according to the following specific calculation formula:
in the method, in the process of the invention,is the upper average length of sugarcane leaf fragments, </i >>The average length of the bagasse particles is that w is the burnout rate of the sugarcane leaf fragments in the stage of mixing combustion with the bagasse particles, namely the ratio of the total combustion mass of the sugarcane leaf fragments to the mass of the sugarcane leaf fragments entering the furnace.
The average length of bagasse particles is measured and calculated before actual sugarcane leaf blending combustionSetting the burnout rate w of the sugarcane leaf fragments in the stage of mixing with the bagasse particles, and calculating the upper limit average length of the sugarcane leaf fragments according to the formula (1)>Then crushing the sugarcane leaves to an average length of less than +.>The sugarcane leaf fragments meeting the requirements can be obtained, so that the sugarcane leaves and the bagasse can be suspended together in a hearth of a bagasse boiler, and further, the efficient and economic co-firing is realized.
After determining the crushing degree of the sugarcane leaves, in order to meet the requirement of the production process on the stable load of the bagasse boiler, the actual production process needs to change the load of the existing bagasse boiler, and the blending combustion proportion k of the sugarcane leaf fragments is determined so as to realize the stable load output combustion of the mixed fuel. For this reason, the inventors have examined the heat productivity by receiving the base moisture, industrial analysis, and the like of a plurality of bagasse particlesMeasuring and fitting data to obtain the received base low-order heating value Q of bagasse particles Slag, ar Is calculated according to the formula:
Q slag, ar ＝16.519-0.178M Slag of (2)
Wherein M is Slag of Is the received base moisture of bagasse particles.
Meanwhile, the received base low-position heating value Q of the sugarcane leaf fragments is obtained through the received base moisture, industrial analysis, heating value detection and data fitting of a plurality of sugarcane leaf fragments Leaf, ar Is calculated according to the formula:
Q leaf, ar ＝15.292-0.163M Leaves of the plant (3)
Wherein M is Leaves of the plant Is the received base moisture of the sugarcane leaf fragments.
And the average density ratio of the bagasse particles to the sugarcane leaf fragments is measured by experiments to be:
ρ slag of ：ρ Leaves of the plant ＝2.8:1 (4)
The load of the bagasse boiler is determined by the total heat of combustion of the fuel in the hearth (namely, the received low-order heating value of the fuel) and is in direct proportion to the total heat, so that the calculation formula of the load Q of the bagasse boiler is as follows:
Q＝ρ fuel and its production process v Fuel and its production process Q Fuel ar (5)
Wherein ρ is Fuel and its production process For density of fuel, v Fuel and its production process For the volume of fuel, Q Fuel ar The generated heat is generated for the fuel burnt in the bagasse boiler furnace.
After the sugarcane leaf chips and the bagasse are mixed and burned, the fuel entering the bagasse boiler is changed from original pure bagasse particles into mixed fuel obtained by mixing the bagasse particles and the sugarcane leaf chips, and at the moment, the calculation formula of the load change coefficient m of the bagasse boiler is as follows:
in which Q Mixing For the load when the bagasse boiler burns fuel as mixed fuel, Q Slag of Is sugarcaneLoad when the slag boiler burns only bagasse as fuel, v Fuel and its production process To the total volume of fuel charged into the bagasse boiler.
The formulas (2) - (5) are carried into the formula (6), and the calculation formula of the upper limit blending combustion proportion k of the sugarcane leaves can be obtained:
in the formula, m is the load change coefficient of the bagasse boiler, namely the proportion of the bagasse boiler load of burning the mixed fuel to the bagasse boiler load of burning only bagasse particles.
As shown in FIG. 1, the base moisture M of the bagasse particles is detected at first during actual blending combustion of the sugarcane leaves Slag of The collected basal water M of sugarcane leaves Leaves of the plant Meanwhile, according to the load stability requirement of the bagasse boiler, the load change coefficient m of the bagasse boiler is determined, the blending combustion proportion k of the sugarcane leaf fragments is calculated by substituting the formula (7), the crushed sugarcane leaf fragments and the bagasse particles are uniformly mixed according to the proportion lower than the upper limit blending combustion proportion k obtained by calculation, and then the mixed fuel meeting the requirement can be obtained.
Example 2
On the basis of the embodiment 1, if the sugarcane leaves can be better suspended in the hearth of the bagasse boiler together with the bagasse, the combustion effect is further improved, and the other two indexes of the sugarcane leaves crushing, namely the upper limit length standard deviation sigma, can be adopted Leaves of the plant And an upper limit length coefficient of variation CV Leaves of the plant The crushing degree of sugarcane leaves is further controlled, and a specific calculation formula is as follows:
σ leaves of the plant ＝σ Slag of (1/w) (8)
CV Leaves of the plant ＝CV Slag of (1/w) (9)
In sigma Leaves of the plant Is the standard deviation of the upper limit length sigma of the sugarcane leaf fragments Slag of Is the standard deviation of the length of bagasse particles, CV Leaves of the plant Is the upper limit length variation coefficient, CV, of sugarcane leaf fragments Slag of Is the length variation coefficient of bagasse particles.
As shown in FIG. 1, before actual mixing and burning of sugarcane leaves, the bagasse particles are sampled to measure the length, and the average length of the bagasse particles is calculated according to the length analysis obtained by the measurementStandard deviation sigma of length Slag of Coefficient of variation CV of length Slag of Then the calculated +.>σ Slag of And CV (CV) Slag of Substituting the corresponding calculation formulas (1), (8) and (9) to calculate the upper average length of the sugarcane leaf fragments +.>Upper limit length standard deviation sigma Leaves of the plant And an upper limit length coefficient of variation CV Leaves of the plant Then crushing the sugarcane leaves to an average length of less than +.>Standard deviation of length less than sigma Leaves of the plant The length variation coefficient is smaller than CV Leaves of the plant The sugarcane leaf fragments meeting the requirements can be obtained, the crushed sugarcane leaf fragments and the bagasse particles are uniformly mixed according to the proportion lower than the upper limit blending combustion proportion k calculated by the method of the embodiment 1, the mixed fuel meeting the requirements can be obtained, and the mixed fuel is sent into the hearth of the bagasse boiler, so that the sugarcane leaf and the bagasse can be better suspended together in the hearth of the bagasse boiler, and further the high efficiency, the economy and the stability of the sugarcane leaf blending combustion are further improved.
To verify the effect of the method of this example, the inventors have tested a sugar manufacturing enterprise in Guangxi Chong left-hand city with a sugar processing capacity of 1 ten thousand tons per day for 100 ten thousand tons per year for sugar cane, 13 ten thousand tons per year for sugar cane by an annual producer, and a packing rate of 6% for bagasse per year, and a sugar cane boiler fired on bagasse of 14.5 ten thousand tons per year. According to the existing production equipment and process, the pressing production line and process determine the grain parameters of bagasse, and the bagasse boiler equipment determines the supply of load, and the specific operation is as follows:
(1) Collecting bagasse particles, and averaging the length of the bagasse particlesStandard deviation sigma of length Slag of And coefficient of variation CV of length Slag of Performing measurement analysis to obtain->σ Slag of ＝11.6、CV Slag of ＝63.2；
The above-mentioned measurement and analysis resultσ Slag of 、CV Slag of And the designed w (the present example designed that the burnout rate of the sugarcane top chip in the stage of mixing with the bagasse particles is 95%, i.e., w=0.95) values are brought into formulas (1), (8) and (9), the upper limit average length of the sugarcane top chip is calculated>Upper limit length standard deviation sigma Leaves of the plant And an upper limit length coefficient of variation CV Leaves of the plant Obtainingσ Leaves of the plant ＝12.2、CV Leaves of the plant ＝66.5。
(2) According to the calculationσ Leaves of the plant And CV (CV) Leaves of the plant The sugarcane leaf fragments are matched, and the sugarcane leaf is crushed, so that the average length of the crushed sugarcane leaf fragments is as less than 58 as possible.The standard deviation of the length is as small as 12.2 and the coefficient of variation of the length is as small as 66.5, so as to reduce the energy consumption to the greatest extent and realize the high efficiency and the economy.
(3) The bagasse receives the basic water M Slag of And the base moisture M of sugarcane leaves Leaves of the plant Detecting to obtain M Slag of =48% (i.e. M Slag of ＝0.48)、M Leaves of the plant =30% (i.e. M Leaves of the plant =0.30), and determining that the load of the bagasse boiler combusting the mixed fuel can be reduced to 80% of that of the bagasse particles only, namely, the load change coefficient m=0.8 of the bagasse boiler; the M obtained is Slag of 、M Leaves of the plant And substituting the value of m into a formula (7), and calculating the blending burning proportion k of the sugarcane leaf fragments to obtain k=37.4%.
(4) Uniformly mixing sugarcane leaf fragments and bagasse particles with the volume ratio of less than 37.4 percent (corresponding mass ratio of 13.4 percent) to obtain a mixed fuel;
(5) The obtained mixed fuel is sent into a hearth of a bagasse boiler to carry out proper smoke-air ratio, so that stable and efficient combustion of bagasse and bagasse leaves can be realized.
By carrying out the mixed combustion of bagasse and bagasse leaves according to the method, the sugar manufacturing enterprise can save bagasse by only adding the crushing and fuel mixing equipment of the bagasse leaves and one pressing season under the condition that the existing bagasse boiler does not carry out structural transformation:
14.5 ten thousand tons- (14.5 ten thousand tons× (1-13.4%) =1.94 ten thousand tons
According to the season of 2022-2023, the average market price of sugarcane leaves to the factory is 290 yuan/t, the processing and crushing cost is 60 yuan/t, and the calculated cost of the sugarcane leaf fuel is as follows: 290/t+60/t=350/t, whereas bagasse market price is 550/t. From this, it can be calculated that the net fuel savings using the sugarcane leaf and bagasse blend as fuel versus using only bagasse as fuel is: (550-350) x 1.94=388 ten thousand yuan, corresponding to a reduction in cost of about 29.8 yuan per ton of white granulated sugar.
Example 3
As shown in fig. 2, in order to match the method, the invention further provides a system for stable and efficient combustion of the corresponding sugarcane leaves in a bagasse boiler, wherein the system comprises:
the sugarcane leaf crushing module 1, namely sugarcane leaf crushing equipment, crushes sugarcane leaves by adjusting parameters such as the rotating speed of the sugarcane leaf crushing equipment, the spacing between blades and the like so as to meet the crushing degree requirement of mixed combustion of the sugarcane leaves, thereby obtaining sugarcane leaf fragments meeting the requirement;
the sugarcane leaf transmission module 2 can specifically adopt a conveyor belt for transmitting the sugarcane leaf fragments, and meanwhile, the matching of the sugarcane leaf mixing proportion is realized by adjusting the transmission speed;
a sugarcane squeezing module 3 for squeezing out sugarcane juice in sugarcane and separating out bagasse particles;
the bagasse transmission module 4 can specifically adopt a conveyor belt for transmitting the obtained bagasse particles, and meanwhile, the matching of the bagasse mixing proportion is realized by adjusting the transmission speed;
the mixing module 5 is used for receiving the sugarcane leaf fragments transmitted from the sugarcane leaf transmission module and the bagasse particles transmitted from the bagasse transmission module, and uniformly stirring and mixing the sugarcane leaf fragments and the bagasse particles through rapid and full stirring to obtain a mixed fuel;
a fuel transmission module 6 for transmitting the mixed fuel to a feeding module of the bagasse boiler;
and the feeding module 7 is used for receiving the mixed fuel transmitted by the fuel transmission module and quantitatively delivering the mixed fuel into the hearth 8 of the bagasse boiler for combustion through hot air.
The foregoing description is directed to the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the invention, and all equivalent changes or modifications made under the technical spirit of the present invention should be construed to fall within the scope of the present invention.
Claims (4)
1. A method for stable and efficient combustion of sugarcane leaves in a bagasse boiler, the method comprising the steps of:
(1) Measuring and calculating the average length of bagasse particlesSetting the burnout rate w of the sugarcane top fragments in the stage of mixing combustion with bagasse particles; according to the->And w, calculating the upper limit average length of sugarcane top pieces +.>The calculation formula is as follows:
in the method, in the process of the invention,is the upper average length of sugarcane leaf fragments, </i >>The average length of the bagasse particles is w is the burnout rate of the sugarcane leaf fragments in the stage of mixing combustion with the bagasse particles, namely the proportion of the total combustion mass of the sugarcane leaf fragments to the mass of the sugarcane leaf fragments entering the furnace;
(2) According to the calculation resultCrushing sugarcane leaves until the average length is less than +.>Obtaining sugarcane leaf fragments;
(3) Detection of the base moisture M received by bagasse particles Slag of And the received base moisture M of the sugarcane leaf fragments Leaves of the plant Meanwhile, according to the load stabilization requirement of the bagasse boiler, determiningThe load change coefficient m of the bagasse boiler; according to the obtained M Slag of 、M Leaves of the plant And m, calculating the upper limit blending ratio k of the sugarcane leaf fragments, wherein the calculation formula is as follows:
wherein k is the upper limit blending ratio of the sugarcane leaf fragments, namely the sugarcane leaf fragments account for the volume fraction of the mixed fuel, and the mixed fuel is obtained by mixing the sugarcane leaf fragments and bagasse particles; m is the load change coefficient of the bagasse boiler, namely the proportion of the bagasse boiler load for burning the mixed fuel to the bagasse boiler load for burning only bagasse particles originally; m is M Slag of The bagasse particles receive the base moisture; m is M Leaves of the plant The received base moisture for sugarcane leaf fragments;
(4) Uniformly mixing the sugarcane top fragments and the bagasse particles according to a proportion lower than an upper limit blending combustion proportion k to obtain a mixed fuel;
(5) And sending the obtained mixed fuel into a bagasse boiler for combustion.
2. The method for stable and efficient combustion of sugarcane leaves in a bagasse boiler as claimed in claim 1, wherein in step (2), the standard deviation of the length of the sugarcane leaf pieces is smaller than the standard deviation sigma of the upper limit length thereof Leaves of the plant ，σ Leaves of the plant The calculation formula of (2) is as follows:
σ leaves of the plant ＝σ Slag of (1/w)
In sigma Leaves of the plant Is the standard deviation of the upper limit length sigma of the sugarcane leaf fragments Slag of Is the standard deviation of the length of bagasse particles.
3. The method for stable smoldering combustion of sugarcane leaves in a bagasse boiler as recited in claim 1, wherein in step (2), the length variation coefficient of the sugarcane leaf pieces is less than the upper limit length variation coefficient CV thereof Leaves of the plant ，CV Leaves of the plant The calculation formula of (2) is as follows:
CV leaves of the plant ＝CV Slag of (1/w)
In CV Leaves of the plant Is the upper limit length variation coefficient, CV, of sugarcane leaf fragments Slag of Is the length variation coefficient of bagasse particles.
4. A system for stable and efficient combustion of sugar cane leaves in a bagasse boiler, the system comprising:
the sugarcane leaf crushing module is used for crushing sugarcane leaves until the average length of fragments of the sugarcane leaves meets a preset value to obtain sugarcane leaf fragments;
the sugarcane leaf transmission module is used for transmitting the sugarcane leaf fragments at a set transmission speed;
the sugarcane squeezing module is used for squeezing sugarcane juice in sugarcane and separating out bagasse particles;
the bagasse conveying module is used for conveying the obtained bagasse particles at a set conveying speed;
the mixing module is used for receiving the sugarcane leaf fragments transmitted from the sugarcane leaf transmission module and the bagasse particles transmitted from the bagasse transmission module, and uniformly stirring and mixing the received sugarcane leaf fragments and the bagasse particles to obtain mixed fuel;
the fuel transmission module is used for transmitting the mixed fuel to a feeding module of the bagasse boiler;
and the feeding module is used for receiving the mixed fuel transmitted by the fuel transmission module and quantitatively feeding the mixed fuel into a hearth of the bagasse boiler for combustion through hot air.
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| CN202311396365.6A CN117267746A (en) | 2023-10-25 | 2023-10-25 | Method and system for stably and efficiently burning sugarcane leaves in bagasse boiler |
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| CN202311396365.6A CN117267746A (en) | 2023-10-25 | 2023-10-25 | Method and system for stably and efficiently burning sugarcane leaves in bagasse boiler |
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