Biomass boiler fuel adaptability enhanced feeding system and control method

Abstract

The invention discloses a biomass boiler fuel adaptability enhanced feeding system and a control method. The biomass boiler fuel adaptability enhanced feeding system comprises a feeding device, a fuel pretreatment module, a multi-parameter detection module, a control unit and an execution mechanism. The feeding device comprises a screw feeder and a vibrating feeder which are arranged in parallel, outlets of the screw feeder and the vibrating feeder are converged into the same blanking channel, a wear-resistant ceramic lining plate is laid on the inner wall of the channel, and a pneumatic arch breaker is mounted at the bottom of the channel. Through a multi-stage pretreatment and intelligent feedback control cooperation mechanism, the adaptability of the complex biomass fuel is remarkably improved. The two-stage pretreatment module effectively breaks caking, screens out overrun particles and adjusts the water content, and the blocking risk is eliminated from the source; multi-parameter real-time detection is combined with a self-adaptive control algorithm, the feeding rate and the air-coal ratio are dynamically optimized, the combustion stability is ensured, and the heat efficiency is remarkably improved; due to the abnormal working condition self-diagnosis function, the manual intervention frequency is reduced, and multi-fuel combustion of multiple components in any proportion is supported.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biomass boiler, in particular to a biomass boiler fuel adaptability enhanced feeding system and a control method. BACKGROUND

[0002] Currently, biomass boilers generally encounter severe challenges in fuel application, and the core problem is poor fuel adaptability. Since the sources of biomass fuel are extremely diverse, including straw, sawdust, rice husk and many other types, these fuels have significant differences in key physical parameters such as particle size, moisture content and density.

[0003] Under this background, the traditional feeding system has many drawbacks. In actual operation, it is easy to appear the conditions of blockage, bridging and uneven feeding. Blockage will cause the fuel to be unable to be normally transported to the inside of the boiler, affecting the combustion process; the bridging phenomenon will hinder the continuous supply of fuel, causing combustion interruption; and uneven feeding will make the combustion unstable and unable to maintain stable combustion conditions. These problems not only directly lead to a significant reduction in the thermal efficiency of the boiler, which cannot fully release the energy of the fuel, but also cause an increase in pollutant emissions, which has a more serious impact on the environment.

[0004] From a technical point of view, most of the existing technologies are limited to using a single mechanical structure or a simple speed regulation strategy. This technical means lacks real-time sensing and response capability to changes in fuel physical properties. When the particle size, moisture content and other parameters of the fuel change, the system cannot automatically adjust the operating parameters to adapt to the new working conditions. Therefore, in actual operation, it is necessary to rely on frequent manual intervention to adjust the parameters, which not only increases the operation and maintenance cost, but also cannot meet the needs of mixed burning of multiple types of fuel. Especially in the face of complex working conditions such as high humidity or irregular particle fuel, the reliability of the system decreases dramatically, and it is difficult to ensure the stable and efficient operation of the boiler. SUMMARY

[0005] Therefore, the present application provides a biomass boiler fuel adaptability enhanced feeding system and a control method to solve the problem that the reliability of the system decreases dramatically in the face of complex working conditions such as high humidity or irregular particle fuel, and it is difficult to ensure the stable and efficient operation of the boiler.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] In a first aspect, a biomass boiler fuel adaptability enhanced feeding system includes a feeding device, a fuel pretreatment module, a multi-parameter detection module, a control unit and an execution mechanism.

[0008] The feeding device comprises a screw feeder and a vibrating feeder arranged in parallel, the outlets of the screw feeder and the vibrating feeder merge into the same material falling channel, the inner wall of the channel is paved with wear-resistant ceramic lining plate, and a pneumatic arch breaker is installed at the bottom of the channel.

[0009] The fuel pretreatment module is composed of a primary pretreatment unit and a secondary adjustment unit connected in series, the primary pretreatment unit comprises a crushing roller set arranged obliquely and a drum screen arranged below, and the secondary adjustment unit comprises a hot air drying cavity and a steam nozzle, and the air inlet of the hot air drying cavity is connected with a boiler flue gas waste heat recovery pipe.

[0010] The multi-parameter detection module is composed of a microwave moisture meter, a material falling impact type particle size sensor and a weighing sensor installed in the material falling channel, which are used to output fuel moisture content, particle size distribution and instantaneous flow signals in real time respectively.

[0011] The control unit is built-in with an adaptive control algorithm, which is used to receive signals of the multi-parameter detection module and connect with a boiler combustion monitoring instrument, and output instructions to an executing mechanism.

[0012] The executing mechanism comprises a variable frequency driver of the feeding device, a damper actuator of the hot air drying cavity, an electric regulating valve of the steam nozzle and an electromagnetic valve of the pneumatic arch breaker.

[0013] Preferably, the crushing roller set of the primary pretreatment unit is composed of a driving roller with hard alloy teeth on the surface and a driven roller, and the gap between the two rollers is adjusted within the range of 2-20 mm by a hydraulic cylinder.

[0014] Preferably, the drum screen adopts a double-layer screen mesh structure, the inner layer screen mesh has a pore size of 15 mm, the outer layer screen mesh has a pore size of 8 mm, the screen cylinder has an inclination angle of 5°-8°, and a self-cleaning brush is arranged on the surface of the screen mesh.

[0015] Preferably, the hot air drying cavity of the secondary adjustment unit is arranged with staggered baffles, the surface of the baffles is coated with a hydrophobic coating, and the hot air temperature is controlled within 80-120℃.

[0016] Preferably, the control unit comprises an abnormality diagnosis sub-module, which issues an alarm when any of the following conditions is detected:

[0017] The current fluctuation rate of the screw feeder is greater than 15% and lasts for 10 seconds;

[0018] The amplitude of the vibrating feeder decreases by 30% and lasts for 5 seconds;

[0019] The pressure difference ΔP of the material falling channel is greater than 10 kPa.

[0020] Preferably, the wear-resistant ceramic lining plate is an alumina ceramic with an Al2O3 content of 95%, the thickness is 8-12 mm, and a honeycomb-shaped micropore array is arranged on the surface.

[0021] Preferably, the steam nozzles are arranged at the outlet end of the hot-air drying chamber, the number of nozzles is 3-5, the spray angle is 30°-45° obliquely downward, and the steam pressure is 0.2-0.5 MPa.

[0022] In a second aspect, the control method of the biomass boiler fuel adaptability enhanced feeding system comprises the following steps:

[0023] S1, based on the microwave moisture meter and particle size sensor data, the control unit calculates the comprehensive adaptability index K of the fuel, K = a·W + β·D_max + γ·σ, wherein W is the moisture content, D_max is the maximum particle size, σ is the particle size standard deviation, and a, β, and γ are weight coefficients;

[0024] S2, when K exceeds the threshold value, the secondary regulation unit is started: if W > 35%, the hot-air drying chamber is started, and if σ > 10 mm, the steam nozzle humidification amount is increased;

[0025] S3, according to the flow feedback of the weighing sensor and the load demand of the boiler, the speed ratio of the screw feeder and the vibrating feeder is dynamically adjusted;

[0026] S4, the pressure change of the falling material channel is monitored in real time, and the pneumatic arch breaking device pulse is triggered when the pressure difference ΔP > 5 kPa.

[0027] Preferably, the speed ratio adjustment strategy in step S3 is:

[0028] When the fuel bulk density > 650 kg / m 3 , the screw feeder speed ratio is 70%-85%;

[0029] When the fuel bulk density < 350 kg / m 3 , the vibrating feeder amplitude ratio is 60%-75%;

[0030] The mixed fuel is distributed to the screw feeder and the vibrating feeder according to the density ratio.

[0031] Preferably, the weight coefficient dynamic configuration rule of the comprehensive adaptability index K is:

[0032] When the boiler load > 90% of the rated load, a = 0.6, β = 0.3, and γ = 0.1;

[0033] When the boiler load < 50% of the rated load, a = 0.3, β = 0.5, and γ = 0.2;

[0034] When two or more fuels are mixed, the value of γ increases by 0.15.

[0035] Compared with the prior art, the present application has at least the following beneficial effects:

[0036] The present application significantly improves the adaptability of complex biomass fuel through a multi-stage pretreatment and intelligent feedback control cooperative mechanism. The two-stage pretreatment module effectively breaks up clumps, screens out oversized particles, and adjusts the moisture content, eliminating the risk of blockage from the source. Real-time detection of multiple parameters combined with a self-adaptive control algorithm dynamically optimizes the feed rate and air-coal ratio, ensuring stable combustion and significantly improving thermal efficiency. The self-diagnosis function under abnormal conditions reduces the frequency of manual intervention and supports the arbitrary proportion of mixed combustion of fuels with multiple components. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes, structures shown in the drawings should not be considered as limiting conditions in the implementation of the present application; for example, based on the technical concepts disclosed in the present application and the exemplary drawings, those skilled in the art can easily make routine adjustments or further optimizations to the increase / decrease / assignment of certain units (components), specific shapes, positional relationships, connection methods, size ratio relationships, etc.

[0038] Figure 1 Module diagram of the biomass boiler fuel adaptability enhancement type feeding system and control method of the present application.

[0039] In the figure: 1, feeding device; 101, screw feeder; 102, vibrating feeder; 103, material falling channel; 104, wear-resistant ceramic lining plate; 105, pneumatic arch breaker;

[0040] 2, fuel pretreatment module; 201, primary pretreatment unit; 202, secondary adjustment unit; 2011, crushing roller group; 2012, drum screen; 2021, hot air drying chamber; 2022, steam nozzle; 2023, waste heat recovery pipe;

[0041] 3, multi-parameter detection module; 301, microwave moisture meter; 302, particle size sensor; 303, weighing sensor;

[0042] 4, control unit;

[0043] 5, actuator; 501, variable frequency drive; 502, damper actuator; 503, electric regulating valve; 504, solenoid valve;

[0044] 6, monitoring instrument. DETAILED DESCRIPTION

[0045] The present application will be further described in detail below with reference to the accompanying drawings.

[0046] As Figure 1As shown, the present application discloses a biomass boiler fuel adaptability enhanced feeding system, which comprises a feeding device 1, a fuel pretreatment module 2, a multi-parameter detection module 3, a control unit 4 and an actuator 5;

[0047] The feeding device 1 comprises a screw feeder 101 and a vibrating feeder 102 arranged in parallel, the outlets of the screw feeder 101 and the vibrating feeder 102 merge into the same material falling channel 103, the inner wall of the channel is lined with wear-resistant ceramic lining 104, and the bottom of the channel is provided with a pneumatic arch breaker 105; the screw feeder 101 and the vibrating feeder 102 can automatically distribute and convey the proportion of different density fuels, the high-density fuel is forced to advance by the screw feeder 101, and the low-density fluffy fuel is fluidized and conveyed by the vibrating feeder 102, so as to prevent the bridging from occurring from the source;

[0048] The fuel pretreatment module 2 is composed of a primary pretreatment unit 201 and a secondary adjustment unit 202 connected in series, the primary pretreatment unit 201 comprises a crushing roller group 2011 arranged obliquely and a drum screen 2012 arranged below, and the secondary adjustment unit 202 comprises a hot air drying cavity 2021 and a steam jet 2022; the air inlet of the hot air drying cavity 2021 is connected with a boiler flue gas waste heat recovery pipe 2023; the clustered fuel is first crushed by the crushing roller, the drum screen 2012 can separate the oversized particles, and then the moisture content is controlled in the optimal combustion interval by waste heat drying or steam humidification;

[0049] The multi-parameter detection module 3 is composed of a microwave moisture meter 301, a falling impact particle size sensor 302 and a weighing sensor 303 installed in the material falling channel 103, which are respectively used to output the real-time signals of the fuel moisture content, the particle size distribution and the instantaneous flow rate; the multi-parameter detection module 3 utilizes the microwave penetration to measure the deep moisture content, the falling impact particle size sensor 302 inverses the particle size distribution through the material falling kinetic energy, and the weighing sensor 303 realizes the closed-loop metering;

[0050] The control unit 4 is built-in with an adaptive control algorithm, which is used to receive the signals of the multi-parameter detection module 3 and connect with a boiler combustion monitoring instrument 6, and output instructions to the actuator 5; the adaptive control algorithm fuses the moisture content, the particle size extreme value and the dispersion into a comprehensive adaptation index K; when K is out of limit, the dry / humidification secondary adjustment is triggered, the speed ratio of the double feeders is dynamically adjusted according to the density characteristics, and the pneumatic arch breaking is started to eliminate the retention in combination with the differential pressure monitoring. The system realizes the whole-chain optimization of "physical property sensing-preprocessing-precise feeding";

[0051] The actuator 5 comprises a frequency converter drive 501 of the feeding device 1, an air door actuator 502 of the hot air drying cavity 2021, an electric regulating valve 503 of the steam jet 2022 and an electromagnetic valve 504 of the pneumatic arch breaker 105.

[0052] The crushing roller group 2011 of the primary pretreatment unit 201 is composed of a driving roller with surface hardfacing alloy teeth and a driven roller. The gap between the two rollers is adjusted within the range of 2-20 mm by a hydraulic cylinder. The hydraulic adjustable crushing roller group 2011 shears and crushes fibrous fuel (such as straw) through the hardfacing alloy teeth and crushes brittle fuel (such as rice husk) through extrusion. The stepless gap adjustment of 2-20 mm enables the system to process fuels with different particle sizes (such as wood chips requiring a large gap and fruit shells requiring a small gap). When detecting large particle aggregation, the system automatically reduces the gap to reduce the probability of subsequent blockage from the source.

[0053] The drum screen 2012 adopts a double-layer screen structure, with an inner layer screen aperture of 15 mm and an outer layer screen aperture of 8 mm. The screen cylinder has an inclination angle of 5°-8°, and the screen surface is provided with a self-cleaning brush. The double-layer screen structure intercepts large impurities such as branches through the inner layer 15 mm screen and filters small particles such as sand through the outer layer 8 mm screen. The 5°-8° inclination angle ensures the balance between screening efficiency and passing rate. The self-cleaning brush continuously scrapes off the clogging material in the screen aperture during rotation, solving the problem of high-humidity fuel sticking to the screen, and avoiding the entry of oversized particles into the dropping channel 103 to cause blockage.

[0054] The hot air drying cavity 2021 of the secondary adjustment unit 202 is arranged with staggered baffles. The surface of the baffles is coated with a hydrophobic coating. The hot air temperature is controlled at 80-120℃. The staggered baffles extend the hot air path to 2.3 times of the conventional structure, ensuring that the fuel is fully contacted with 80-120℃ residual heat flue gas. The hydrophobic coating prevents the baffles from sticking to the high-moisture fuel during drying. Meanwhile, the steam nozzle 2022 sprays saturated steam to prevent dust explosion when the fuel is too dry. This scheme controls the moisture content of the fuel within a deviation range of ±3%, providing ideal fuel conditions for subsequent combustion.

[0055] The control unit 4 includes an abnormality diagnosis sub-module 401, which issues an alarm when any of the following conditions is detected:

[0056] The current fluctuation rate of the screw feeder 101 is greater than 15% and lasts for 10 seconds;

[0057] The amplitude of the vibrating feeder 102 decreases by 30% and lasts for 5 seconds;

[0058] The pressure difference ΔP of the dropping channel 103 is greater than 10 kPa.

[0059] The abnormality diagnosis sub-module predicts the risk of locked-rotor of the screw feeder 101 through current fluctuation, identifies mechanical failure of the vibrating feeder 102 through amplitude attenuation, and directly triggers the arch breaking action when the high channel pressure difference is detected. The three work together to achieve "current-vibration-pressure" triple protection, reducing the probability of failure shutdown, generating a diagnosis report to guide maintenance, and greatly improving the efficiency compared to traditional manual inspection.

[0060] The wear-resistant ceramic lining plate 104 is an alumina ceramic with an Al2O3 content of 95%, a thickness of 8-12 mm, and a honeycomb-shaped micropore array on the surface. The 95% alumina ceramic lining plate has greater hardness and effectively resists wear from silica in the biomass fuel. The honeycomb micropore array adsorbs fuel particles to form a protective layer, reducing the metal substrate wear rate and reducing the noise from 105 dB to 82 dB.

[0061] The steam nozzles 2022 are arranged at the outlet end of the hot air drying chamber 2021, the number of nozzles is 3-5, the spray angle is 30°-45° obliquely downward, the steam pressure is 0.2-0.5 MPa, and the obliquely downward 30°-45° steam injection realizes three-dimensional humidification during the fuel falling process. The 3-5 nozzles form a cross-coverage network, and the 0.2-0.5 MPa pressure makes the steam penetrate 10 cm of the material layer. When this scheme is implemented, the moisture content difference between the surface layer and the core of the fuel is reduced, and the problem of uneven feeding caused by local over-humidification is avoided.

[0062] The control method of the biomass boiler fuel adaptability enhanced feeding system includes the following steps:

[0063] S1, based on the data of the microwave moisture meter 301 and the particle size sensor 302, the control unit 4 calculates the comprehensive adaptability index K of the fuel, K = α·W + β·D_max + γ·σ, where W is the moisture content, D_max is the maximum particle size, σ is the particle size standard deviation, and α, β, and γ are weight coefficients;

[0064] S2, when K exceeds the threshold value, start the secondary regulation unit 202: if W > 35%, turn on the hot air drying chamber 2021, and if σ > 10 mm, increase the humidification of the steam nozzles 2022;

[0065] S3, dynamically adjust the speed ratio of the screw feeder 101 and the vibration feeder 102 according to the flow feedback of the weighing sensor 303 and the boiler load demand;

[0066] S4, real-time monitor the pressure change of the falling material channel 103, and trigger the pulse blowing of the pneumatic arch breaker 105 when the pressure difference ΔP > 5 kPa.

[0067] The speed ratio adjustment strategy in step S3 is:

[0068] When the fuel bulk density > 650 kg / m 3 , the speed ratio of the screw feeder 101 is 70%-85%;

[0069] When the fuel bulk density < 350 kg / m 3 , the amplitude ratio of the vibration feeder 102 is 60%-75%;

[0070] The mixed fuel is proportionally distributed to the screw feeder 101 and the vibrating feeder 102 according to density.

[0071] The dual-machine load distribution strategy based on fuel bulk density is that: high-density fuel (such as wood particles) mainly relies on the screw feeder 101 to advance, preventing the dense settlement caused by vibrating conveying; low-density fuel (such as rice husk) is preferentially fed by vibration to avoid being crushed by the screw.

[0072] The dynamic configuration rule of the weight coefficient of the comprehensive adaptation index K is:

[0073] When the boiler load is greater than 90% of the rated load, α=0.6, β=0.3, and γ=0.1;

[0074] When the boiler load is less than 50% of the rated load, α=0.3, β=0.5, and γ=0.2;

[0075] When two or more kinds of fuel are mixed, the value of γ is increased by 0.15.

[0076] The dynamic weight configuration enables the system to adapt to different working conditions: at high load, the moisture content is mainly controlled (α=0.6) to ensure stable steam production; at low load, the particle size control is strengthened (β=0.5) to maintain the combustion temperature; when mixed with two or more kinds of fuel, the weight of particle size dispersion is increased (γ+0.15) to solve the problem of uneven fluidization caused by composition difference.

[0077] The technical features of the above embodiments can be combined in any manner (as long as the combination of the technical features does not exist contradictions), in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described; these embodiments which are not explicitly written should also be considered as the scope of the present disclosure.

Claims

1. Biomass boiler fuel adaptability enhanced feeding system, characterized by: It comprises a feeding device (1), a fuel pre-processing module (2), a multi-parameter detection module (3), a control unit (4) and an actuator (5); The feeding device (1) comprises a screw feeder (101) and a vibrating feeder (102) arranged in parallel, wherein the outlets of the screw feeder (101) and the vibrating feeder (102) converge into the same blanking channel (103), the inner wall of the channel is provided with a wear-resistant ceramic lining (104), and a pneumatic arch breaker (105) is installed at the bottom of the channel; The fuel pretreatment module (2) is composed of a primary pretreatment unit (201) and a secondary regulating unit (202) connected in series, wherein the primary pretreatment unit (201) comprises an inclined crushing roller group (2011) and a drum screen (2012) arranged below, and the secondary regulating unit (202) comprises a hot air drying chamber (2021) and a steam nozzle (2022), and the air inlet of the hot air drying chamber (2021) is connected to a boiler flue gas waste heat recovery pipe (2023); The multi-parameter detection module (3) is composed of a microwave moisture meter (301), a falling material impact particle size sensor (302) and a weighing sensor (303) installed in the falling material channel (103), and is used to output fuel moisture content, particle size distribution and instantaneous flow rate signals in real time respectively; The control unit (4) has a built-in adaptive control algorithm, is used to receive signals from the multi-parameter detection module (3), connect to the boiler combustion monitoring instrument (6), and output instructions to the actuator (5); The actuator (5) comprises a variable frequency drive (501) of the feeding device (1), a damper actuator (502) of the hot air drying chamber (2021), an electric regulating valve (503) of the steam nozzle (2022), and a solenoid valve (504) of the pneumatic arch breaker (105).

2. The biomass boiler fuel adaptability enhanced feeding system according to claim 1, characterized in that: The crushing roller group (2011) of the primary pretreatment unit (201) consists of a driving roller and a driven roller with hard alloy teeth built-up on the surface, and the gap between the two rollers is adjusted within the range of 2-20 mm by a hydraulic cylinder.

3. The biomass boiler fuel adaptability enhanced feeding system according to claim 2, characterized in that: The drum screen (2012) adopts a double-layer screen structure, the inner screen aperture is 15mm, the outer screen aperture is 8mm, the screen drum inclination angle is 5°-8°, and a self-cleaning brush is provided on the screen surface.

4. The biomass boiler fuel adaptability enhanced feeding system according to claim 3, characterized in that: Guide plates are arranged in a staggered manner in the hot air drying chamber (2021) of the secondary regulating unit (202), and the surfaces of the guide plates are coated with a hydrophobic coating, and the hot air temperature is controlled at 80-120°C.

5. The biomass boiler fuel adaptability enhanced feeding system according to claim 1, characterized in that: The control unit (4) includes an abnormality diagnosis submodule that issues an alarm when any of the following conditions is detected: The current fluctuation rate of the screw feeder (101) is greater than 15% and lasts for 10 seconds; The amplitude of the vibrating feeder (102) is reduced by 30% and lasts for 5 seconds; The pressure difference ΔP of the blanking channel (103) is greater than 10 kPa.

6. The biomass boiler fuel adaptability enhanced feeding system according to claim 1, characterized in that: The wear-resistant ceramic lining plate (104) is made of alumina ceramic with an Al2O3 content of 95%, a thickness of 8-12 mm, and a honeycomb micropore array on the surface.

7. The biomass boiler fuel adaptability enhanced feeding system according to claim 1, characterized in that: The steam nozzles (2022) are arranged at the outlet end of the hot air drying chamber (2021), the number of nozzles is 3-5, the spraying angle is 30°-45° obliquely downward, and the steam pressure is 0.2-0.5 MPa.

8. A control method for a biomass boiler fuel adaptability enhanced feeding system, characterized in that: The control method includes the following steps: S1. Based on the data from the microwave moisture meter (301) and the particle size sensor (302), the control unit (4) calculates the fuel comprehensive adaptability index K, K=α·W+β·D_max+γ·σ, where W is the moisture content, D_max is the maximum particle size, σ is the particle size standard deviation, and α, β, and γ are weight coefficients; S2. When K exceeds the threshold, the secondary regulating unit (202) is activated: if W>35%, the hot air drying chamber (2021) is opened; if σ>10 mm, the humidification amount of the steam nozzle (2022) is increased; S3, dynamically adjusting the speed ratio of the screw feeder (101) and the vibrating feeder (102) according to the flow feedback of the weighing sensor (303) and the boiler load demand; S4. Real-time monitoring of the pressure change in the blanking channel (103), triggering the pulse spraying of the pneumatic arch breaker (105) when the pressure difference ΔP>5kPa.

9. The control method of the biomass boiler fuel adaptability enhanced feeding system according to claim 8, characterized in that: The speed ratio adjustment strategy in step S3 is: When the fuel bulk density is greater than 650 kg / m 3 When the screw feeder (101) rotates at a speed of 70%-85%; When the fuel bulk density is less than 350 kg / m 3 When the vibration feeder (102) has an amplitude of 60%-75%; The mixed fuel is distributed to the screw feeder (101) and the vibrating feeder (102) according to density ratio.

10. The control method of the biomass boiler fuel adaptability enhanced feeding system according to claim 8, characterized in that: The dynamic configuration rule of the weight coefficient of the comprehensive adaptation index K is: When the boiler load is greater than 90% of the rated load, α = 0.6, β = 0.3, γ = 0.1; When the boiler load is less than 50% of the rated load, α = 0.3, β = 0.5, γ = 0.2; When two or more fuels are mixed, the γ value increases by 0.15.

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