A method and system for stabilizing a burner

Abstract

This application discloses a peak-shaving method and system for a stable-burner, comprising: acquiring the load rate range value of the generator set during deep peak shaving, and controlling the coal feed rate of the coal mill by comparing the load rate range value with standard operating parameters; determining the number of medium atomizing oil guns to be called based on the current coal feed rate of the coal mill; pre-setting flame characteristic identification standards, including the standard shape of the black flame head and the standard shape of the flame flickering; determining the length of the black flame head in the furnace during deep peak shaving by a flame detection device based on the flame characteristic identification standards, and controlling the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace; determining the number of flame flickering times in the furnace during deep peak shaving by a flame detection device, and controlling the oil gun injection volume according to the number of flame flickering times in the furnace; determining the brightness of the flame in the furnace during deep peak shaving by a flame detection device, and adjusting the economizer water inlet data according to the brightness of the flame in the furnace during deep peak shaving.

Description

Technical Field

[0001] This invention relates to the field of deep peak shaving in thermal power plants, and in particular to a peak shaving method and system for a stable combustion burner. Background Technology

[0002] The installed capacity of new energy sources such as wind power, hydropower, and photovoltaic power in the power generation system continues to increase, while thermal power is gradually shifting from a primary power source to an auxiliary service power source. However, under special conditions such as low wind speeds, dry seasons, and rainy days, new energy sources cannot guarantee a stable output of electricity. At this time, relatively stable thermal power must step in and continue to fulfill its power generation mission through deep peak shaving.

[0003] Specifically, converting a portion of electrical energy into sensible heat for energy storage through peak-shaving systems such as electric water heating and electric solid-state thermal storage boilers can effectively reduce the grid-connected power of thermal power units and achieve deep peak shaving. Currently, the amount of coal fed and the number of oil guns used in boiler operation affect operational stability. Insufficient oxygen in the furnace can lead to incomplete combustion, while excessive oxygen can cause heat loss. Simultaneously, the ventilation volume of the ventilation pipes needs to be matched to maintain a stable furnace negative pressure. During pressure drops, oil injection can be used to mitigate the impact. A decrease in negative pressure, especially severe flue gas emissions, can directly endanger equipment and personnel safety, potentially causing fires. Conversely, an increase in negative pressure allows cold air to enter the furnace, increasing heat loss and reducing boiler combustion efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for peak shaving of a stable combustion burner to solve the above-mentioned technical problems, thereby improving boiler combustion efficiency and boiler stability.

[0005] In some embodiments of this application, the coal feed rate of the coal mill is controlled by comparing the load rate range of the generator set during deep peak shaving with the standard operating parameters. Based on the coal feed rate of the coal mill, the number of medium atomizing oil guns to be called is determined to ensure stable initial combustion of the boiler and avoid incomplete combustion of pulverized coal.

[0006] In some embodiments of this application, the ventilation volume of the ventilation pipe, the oil injection volume of the oil gun, and the water intake volume of the economizer are adjusted by identifying flame characteristics. Then, the ventilation volume and the oil injection volume are adjusted a second time by the oxygen content and the rate of gas pressure drop, so as to ensure the overall stability of the combustion of the boiler in the thermal power plant, avoid incomplete combustion of pulverized coal, which would cause flue gas to overflow and affect the safety of workers, and at the same time avoid serious power plant accidents such as boiler shutdown and furnace explosion.

[0007] This invention discloses a peak-shaving method and system for a stable combustion burner, comprising:

[0008] The load rate range of the generator set during deep peak shaving is obtained, and the coal feed rate of the coal mill is controlled by comparing the load rate range with the standard operating parameters.

[0009] Based on the current coal feed rate of the coal mill, determine the number of media atomizing oil guns to be called.

[0010] There are preset flame feature recognition standards, which include the standard shape of black flame head and the standard shape of flame flickering;

[0011] Based on flame feature recognition standards, the length of the black flame head in the furnace during depth peaking is determined by the flame detection device, and the ventilation volume of the ventilation pipe is controlled according to the length of the black flame head in the furnace.

[0012] Based on flame feature recognition standards, a flame detection device determines the number of times the furnace flame flashes during depth peak adjustment, and controls the amount of oil sprayed from the oil gun according to the number of times the furnace flame flashes.

[0013] The brightness of the flame in the furnace during deep peak shaving is determined by the flame detection device, and the economizer water inlet data is adjusted based on the brightness of the flame in the furnace during deep peak shaving.

[0014] Obtain the oxygen content and adjust the ventilation volume of the ventilation duct based on the oxygen content data;

[0015] The main air pressure drop rate is obtained, and the ventilation volume of the ventilation pipe and the oil injection volume of the oil gun are adjusted according to the main air pressure drop rate.

[0016] In some embodiments of this application, when controlling the coal feed rate of the coal mill according to the load rate range of the generator set during deep peak shaving, the load rate range value A of the generator set during deep peak shaving is determined, and a preset load rate range value matrix A0 is set, with A0 (A1, A2, A3, ..., An), where A1 is the first preset load rate range value, A2 is the second preset load rate range value, A3 is the third preset load rate range value, ..., An is the nth preset load rate range value, and A1 < A2 < A3 < ... < An;

[0017] The coal feed rate matrix B of the preset coal mill is defined as B0 (B1, B2, B3, ..., Bn), where B1 is the coal feed rate of the first preset coal mill, B2 is the coal feed rate of the second preset coal mill, B3 is the coal feed rate of the third preset coal mill, ..., Bn is the coal feed rate of the nth preset coal mill, and B1 < B2 < B3 < ... < Bn;

[0018] The coal feed rate of the coal mill is set according to the relationship between the load rate range value A of the generator set during deep peak shaving and the coal feed rate of each preset coal mill:

[0019] When A < A1, the coal feed rate B1 of the first preset coal mill is selected as the coal feed rate of the coal mill.

[0020] When A1≤A<A2, the coal feed rate B2 of the second preset coal mill is selected as the coal feed rate of the coal mill;

[0021] When A2≤A<A3, the coal feed rate B3 of the third preset coal mill is selected as the coal feed rate of the coal mill. ......

[0023] When An-1≤A<An, the coal feed rate Bn of the fourth preset coal mill is selected as the coal feed rate of the coal mill.

[0024] In some embodiments of this application, a preset medium atomizing oil gun call quantity matrix C is defined as C0(C1, C2, C3, ..., Cn), where C1 is the first preset medium atomizing oil gun call quantity, C2 is the second preset medium atomizing oil gun call quantity, ..., Cn is the nth preset medium atomizing oil gun call quantity, and C1 < C2 < C3 < ... < Cn

[0025] The number of media atomizing oil guns to be called is set according to the relationship between the coal feed rate matrix C of the coal mill and the media atomizing oil gun call quantity matrix:

[0026] When B < B1, the coal feed rate C1 of the first preset coal mill is selected as the number of times the medium atomizing oil gun is called.

[0027] When B1≤B<B2, the coal feed rate C2 of the second preset coal mill is selected as the number of times the medium atomizing oil gun is called.

[0028] When B2≤B<B3, the coal feed rate C3 of the third preset coal mill is selected as the number of times the medium atomizing oil gun is called. ......

[0030] When Bn-1≤B<Bn, the coal feed rate Cn of the fourth preset coal mill is selected as the number of times the medium atomizing oil gun is called.

[0031] In some embodiments of this application, a flame television is preset. When adjusting the water inlet of the economizer according to the brightness of the furnace flame, the brightness of the furnace flame D is determined, and a furnace flame brightness matrix D0 is preset. D0(D1, D2, D3, ..., Dn) is set, where D1 is the first preset furnace flame brightness, D2 is the second preset furnace flame brightness, D3 is the third preset furnace flame brightness, ..., Dn is the nth preset furnace flame brightness, and D1 < D2 < D3 < ... < Dn;

[0032] A preset economizer inlet water volume matrix E0 is defined as E0(E1, E2, E3, En), where E1 is the first preset economizer inlet water volume, E2 is the second preset economizer inlet water volume, E3 is the third preset economizer inlet water volume, ..., En is the nth preset economizer inlet water volume, and E1 < E2 < E3 < ... < En;

[0033] When D < D1, the first preset economizer water inlet E1 is selected as the economizer water inlet.

[0034] When D1≤D<D2, the second preset economizer water inlet E2 is selected as the economizer water inlet.

[0035] When D2≤D<D3, the third preset economizer water inlet E3 is selected as the economizer water inlet. ......

[0037] When Dn-1≤D<Dn, the fourth preset economizer water inlet En is selected as the economizer water inlet.

[0038] In some embodiments of this application, a flame detection device is preset. When adjusting the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace, the length F of the black flame head in the furnace is determined. A preset furnace flame black flame head length matrix F0 is set, and F0(F1, F2, F3, ..., Fn) is defined, where F1 is the first preset furnace flame black flame head length, F2 is the second preset furnace flame black flame head length, F3 is the third preset furnace flame black flame head length, ..., Fn is the fourth preset furnace flame black flame head length, and F1 < F2 < F3 < ... < F4;

[0039] A preset ventilation duct ventilation volume matrix G0 is defined as G0(G1, G2, G3, ..., Gn), where G1 is the first preset ventilation duct ventilation volume, G2 is the second preset ventilation duct ventilation volume, G3 is the third preset ventilation duct ventilation volume, ..., Gn is the fourth preset ventilation duct ventilation volume, and G1 < G2 < G3 < ... < Gn;

[0040] The ventilation volume of the ventilation pipe is set according to the relationship between the length F of the black flame head in the furnace and the preset lengths of the black flame heads in each furnace:

[0041] When F < F1, the fourth preset ventilation duct ventilation volume G1 is selected as the ventilation duct ventilation volume;

[0042] When F1≤F<F2, the third preset ventilation duct ventilation volume G2 is selected as the ventilation duct ventilation volume;

[0043] When F2 ≤ F < F3, select the second preset ventilation pipe ventilation volume G3 as the ventilation pipe ventilation volume; ......

[0045] When Fn-1 ≤ F < Fn, select the first preset ventilation pipe ventilation volume Gn as the ventilation pipe ventilation volume;

[0046] In some embodiments of the present application, there is a preset flame detection device. When adjusting the fuel injection volume of the oil gun according to the number of furnace flame flashes, determine the number of furnace flame flashes H, preset a furnace flame flash number matrix H0, and set H0(H1, H2, H3,..., Hn), where H1 is the first preset furnace flame flash number, H2 is the second preset furnace flame flash number, H3 is the third preset furnace flame flash number,..., Hn is the nth preset furnace flame flash number, and H1 < H2 < H3 <... < Hn;

[0047] Preset an oil gun fuel injection volume matrix I0, and set I0(I1, I2, I3, In), where I1 is the first preset oil gun fuel injection volume, I2 is the second preset oil gun fuel injection volume, I3 is the third preset oil gun fuel injection volume,..., In is the nth preset oil gun fuel injection volume, and I1 < I2 < I3 <... < In;

[0048] When H < H1, select the first preset oil gun fuel injection volume I1 as the oil gun fuel injection volume;

[0049] When H1 ≤ H < H2, select the second preset oil gun fuel injection volume I‘2 as the oil gun fuel injection volume;

[0050] When H2 ≤ H < H3, select the third preset oil gun fuel injection volume I3 as the oil gun fuel injection volume; ......

[0052] When Hn-1 ≤ H < Hn, select the fourth preset oil gun fuel injection volume In as the oil gun fuel injection volume;

[0053] In some embodiments of the present application, obtain the corrected ventilation pipe ventilation volume K, the real-time ventilation pipe ventilation volume G, obtain an oxygen content value matrix J, and set J(J1, J2, J3,..., Jn), where J1 is the preset first oxygen content value, J2 is the preset second oxygen content value, J3 is the preset third oxygen content value,..., Jn is the preset nth oxygen content value;

[0054] Note: There seems to be a mistake in the original text where it says "the fourth preset oil gun fuel injection volume In" in item , it should probably be "the nth preset oil gun fuel injection volume In" as per the previous pattern, and I have made the correction in the translation.The ventilation compensation coefficient L of the preset ventilation duct is set as L(L1, L2, L3, ..., Ln), where L1 is the preset ventilation compensation coefficient of the first ventilation duct, L2 is the preset ventilation compensation coefficient of the second ventilation duct, L3 is the preset ventilation compensation coefficient of the third ventilation duct, ..., Ln is the preset ventilation compensation coefficient of the nth ventilation duct.

[0055] When J < J1, the corrected ventilation volume of the ventilation duct is K = L1 * G1;

[0056] When J1≤J<J2, the corrected ventilation volume of the ventilation duct is K=L2*G2;

[0057] When J2≤J<J3, the corrected ventilation volume of the ventilation duct is K=L3*G3; ......

[0059] When Jn-1≤J<Jn, the corrected ventilation volume of the ventilation duct is K=Ln*Gn;

[0060] In some embodiments of this application, the corrected oil gun injection quantity M, the real-time oil gun injection quantity I, the air pressure drop rate matrix N are obtained, and N(N1, N2, N3, ..., Nn) are set, where N1 is a preset first air pressure drop rate, N2 is a preset second air pressure drop rate, N3 is a preset third air pressure drop rate, ..., Nn is a preset nth air pressure drop rate;

[0061] The preset oil gun injection quantity compensation coefficient P is set as P(P1, P2, P3, ..., Pn), where P1 is the preset first oil gun injection quantity compensation coefficient, P2 is the preset second oil gun injection quantity compensation coefficient, P3 is the preset third oil gun injection quantity compensation coefficient, ..., Pn is the preset nth oil gun injection quantity compensation coefficient.

[0062] When N < N1, the corrected oil gun injection quantity M = P1 * I1;

[0063] When N1≤N<N2, the corrected oil gun injection quantity M=P2*I2;

[0064] When N2≤N<N3, the corrected oil gun injection quantity M=P3*I3; ......

[0066] When Nn-1≤N<Nn, the corrected oil gun injection quantity M=Pn*In;

[0067] Obtain the ventilation volume Q of the ventilation duct after secondary correction, and the real-time ventilation volume K of the ventilation duct.

[0068] The ventilation secondary compensation coefficient R of the preset ventilation duct is set as R(R1, R2, R3, ..., Rn), where R1 is the preset secondary compensation coefficient of the first ventilation duct, R2 is the preset secondary compensation coefficient of the second ventilation duct, R3 is the preset secondary compensation coefficient of the third ventilation duct, ..., Rn is the preset secondary compensation coefficient of the nth ventilation duct.

[0069] When N < N1, the ventilation volume of the ventilation duct after the second correction is Q = R1 * K1;

[0070] When N1≤N<N2, the ventilation volume of the ventilation duct after the second correction is Q=R2*K2;

[0071] When N2≤N<N3, the ventilation volume of the ventilation duct after the second correction is Q=R3*K3; ......

[0073] When Nn-1≤N<Nn, the ventilation volume of the ventilation duct after the second correction is Q=Rn*Kn;

[0074] Some embodiments of this application disclose a stable combustion burner peak-shaving system, including an operation module that acquires the load rate range value of the generator set during deep peak shaving, controls the coal feed rate of the coal mill by comparing the load rate range value with the standard operating parameters, determines the type of oil gun used in the stable combustion burner based on the current coal feed rate of the coal mill, controls the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace, adjusts the economizer water inlet data based on the brightness of the furnace flame during deep peak shaving, and controls the oil injection volume of the oil gun according to the number of times the furnace flame flickers.

[0075] The correction module acquires the oxygen content and adjusts the ventilation volume of the ventilation duct based on the oxygen content data; it also acquires the main air pressure drop rate and adjusts the ventilation volume of the ventilation duct and the oil gun injection volume based on the main air pressure drop rate.

[0076] This application discloses a peak shaving method and system for a stable combustion burner, which has the following advantages compared to deep peak shaving:

[0077] 1. By acquiring the load rate range of the generator set during deep peak shaving, the coal feed rate of the coal mill is controlled; and based on the current coal feed rate of the coal mill, the number of media atomizing oil guns to be called is determined to avoid incomplete combustion caused by coal accumulation in the furnace, thus ensuring the combustion efficiency of the boiler. There is a preset flame characteristic recognition standard, and the flame characteristics in the furnace during deep peak shaving are determined by the flame detection device, thereby controlling the ventilation volume of the ventilation pipe, the oil injection volume of the oil gun, and the water intake of the economizer. This ensures the stability of the oxygen content in the furnace, saves oil consumption of the oil gun, ensures the stability of the flame in the furnace, and controls the water intake data of the economizer to ensure the normal operation of the water circulation.

[0078] 2. Adjust the ventilation volume of the ventilation pipe according to the real-time oxygen content data, and adjust the ventilation volume of the ventilation pipe and the oil injection volume of the oil gun according to the main gas pressure drop rate. Avoid drastic changes in the gas pressure inside the boiler due to changes in the combustion state. Set a compensation coefficient to precisely adjust the ventilation volume and improve the stability of the combustion system.

[0079] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0080] Figure 1 This is a schematic flowchart of a peak-shaving method and system for a stable combustion burner in an embodiment of this application;

[0081] Figure 2 This is a schematic diagram of parameter control in an embodiment of this application. Detailed Implementation

[0082] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0083] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments based on the following content of the present invention. In the present invention, unless otherwise expressly specified and limited, the technical terms used in this application should have the ordinary meaning understood by those skilled in the art. The terms "connected," "linked," "fixed," "set," etc., should be interpreted broadly, and can refer to fixed connection, detachable connection, or integral connection; can refer to direct connection or indirect connection through an intermediate medium; can refer to mechanical connection or electrical connection, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances. Unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, "above," "on top of," or "on the second feature" can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The phrase "below," "under," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Relational terms such as "first," "second," etc., are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should be noted that similar labels and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0084] like Figure 1 and Figure 2 As shown, a preferred embodiment of the present invention provides a peak-shaving method and system for a stable combustion burner, comprising:

[0085] S101: Operation module, obtains the load rate range value of the generator set during deep peak shaving, and controls the coal feed rate of the coal mill by comparing the load rate range value with the standard operating parameters. Based on the current coal feed rate of the coal mill, it determines the type of oil gun used in the stable combustion burner, controls the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace, adjusts the water inlet data of the economizer based on the brightness of the furnace flame during deep peak shaving, and controls the oil spray volume of the oil gun according to the number of times the furnace flame flashes.

[0086] S102: Correction module, which obtains oxygen content and adjusts the ventilation volume of the ventilation pipe according to the oxygen content data; obtains the main air pressure drop rate and adjusts the ventilation volume of the ventilation pipe and the oil gun injection volume according to the main air pressure drop rate.

[0087] Specifically, when controlling the coal feed rate of the coal mill based on the load rate range of the generator set during deep peak shaving, the load rate range value A of the generator set during deep peak shaving is determined, and a preset load rate range value matrix A0 is set, with A0 (A1, A2, A3, ..., An), where A1 is the first preset load rate range value, A2 is the second preset load rate range value, A3 is the third preset load rate range value, ..., An is the nth preset load rate range value, and A1 < A2 < A3 < ... < An.

[0088] The coal feed rate matrix B of the preset coal mill is defined as B0(B1, B2, B3, ..., Bn), where B1 is the coal feed rate of the first preset coal mill, B2 is the coal feed rate of the second preset coal mill, B3 is the coal feed rate of the third preset coal mill, ..., Bn is the coal feed rate of the nth preset coal mill, and B1 < B2 < B3 < ... < Bn.

[0089] The coal feed rate of the coal mill is set according to the relationship between the load rate range value A of the generator set during deep peak shaving and the coal feed rate of each preset coal mill:

[0090] When A < A1, the coal feed rate B1 of the first preset coal mill is selected as the coal feed rate of the coal mill.

[0091] When A1≤A<A2, the coal feed rate B2 of the second preset coal mill is selected as the coal feed rate of the coal mill.

[0092] When A2≤A<A3, the coal feed rate B3 of the third preset coal mill is selected as the coal feed rate of the coal mill.

[0093] When An-1≤A<An, the coal feed rate Bn of the fourth preset coal mill is selected as the coal feed rate of the coal mill.

[0094] It is understandable that in the above embodiments, the coal feed rate of the coal mill is controlled according to the load rate range of the generator set during deep peak shaving, thereby controlling the amount of pulverized coal entering the furnace, preventing the problem of pulverized coal accumulation and difficulty in ignition caused by excessive pulverized coal, and also preventing the problem of low power output due to insufficient pulverized coal.

[0095] Specifically, a matrix C for the number of media atomizing oil guns is defined as C0(C1, C2, C3, ..., Cn), where C1 is the number of the first preset media atomizing oil gun, C2 is the number of the second preset media atomizing oil gun, ..., Cn is the number of the nth preset media atomizing oil gun, and C1 < C2 < C3 < ... < Cn.

[0096] The number of media atomizing oil guns to be used is set according to the relationship between the coal feed rate matrix C of the coal mill and the media atomizing oil gun call quantity matrix:

[0097] When B < B1, the coal feed rate C1 of the first preset coal mill is selected as the number of media atomizing oil guns to be called.

[0098] When B1≤B<B2, the coal feed rate C2 of the second preset coal mill is selected as the number of media atomizing oil guns to be called.

[0099] When B2≤B<B3, the coal feed rate C3 of the third preset coal mill is selected as the number of media atomizing oil guns to be called.

[0100] ......

[0101] When Bn-1≤B<Bn, the coal feed rate Cn of the fourth preset coal mill is selected as the number of media atomizing oil guns to be called.

[0102] It is understandable that in the above embodiments, the number of medium atomizing oil guns to be called is set according to the coal feed rate of the coal mill. During the deep peak shaving process, as the amount of coal powder input decreases and the load decreases, in order to ensure that the boiler continues to burn without going out, the fuel oil system must be ready at all times and control the number of oil guns to be called to ensure that the boiler continues to burn.

[0103] Specifically, a flame television is preset. When adjusting the economizer water inlet according to the brightness of the furnace flame, the brightness of the furnace flame D is determined. A furnace flame brightness matrix D0 is preset, and D0(D1, D2, D3, ..., Dn) is set, where D1 is the first preset furnace flame brightness, D2 is the second preset furnace flame brightness, D3 is the third preset furnace flame brightness, ..., Dn is the nth preset furnace flame brightness, and D1 < D2 < D3 < ... < Dn;

[0104] A preset economizer inlet water volume matrix E0 is defined as E0(E1, E2, E3, En), where E1 is the first preset economizer inlet water volume, E2 is the second preset economizer inlet water volume, E3 is the third preset economizer inlet water volume, ..., En is the nth preset economizer inlet water volume, and E1 < E2 < E3 < ... < En.

[0105] When D < D1, the first preset economizer water inlet E1 is selected as the economizer water inlet.

[0106] When D1≤D<D2, the second preset economizer water inlet E2 is selected as the economizer water inlet.

[0107] When D2≤D<D3, the third preset economizer water inlet E3 is selected as the economizer water inlet. ......

[0109] When Dn-1≤D<Dn, the fourth preset economizer water inlet En is selected as the economizer water inlet.

[0110] Specifically, a flame detection device is pre-set. When adjusting the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace, the length F of the black flame head in the furnace is determined. A matrix F0 of the length of the black flame head in the furnace is pre-set, and F0(F1, F2, F3, ..., Fn) is set, where F1 is the first pre-set length of the black flame head in the furnace, F2 is the second pre-set length of the black flame head in the furnace, F3 is the third pre-set length of the black flame head in the furnace, ..., Fn is the fourth pre-set length of the black flame head in the furnace, and F1 < F2 < F3 < ... < F4.

[0111] A preset ventilation duct ventilation volume matrix G0 is defined as G0(G1, G2, G3, ..., Gn), where G1 is the first preset ventilation duct ventilation volume, G2 is the second preset ventilation duct ventilation volume, G3 is the third preset ventilation duct ventilation volume, ..., Gn is the fourth preset ventilation duct ventilation volume, and G1 < G2 < G3 < ... < Gn.

[0112] The ventilation volume of the ventilation duct is set according to the relationship between the length F of the black flame head in the furnace and the preset lengths of the black flame heads in each furnace:

[0113] When F < F1, the fourth preset ventilation duct ventilation volume G1 is selected as the ventilation duct ventilation volume.

[0114] When F1≤F<F2, the third preset ventilation duct ventilation volume G2 is selected as the ventilation duct ventilation volume.

[0115] When F2≤F<F3, the second preset ventilation duct ventilation volume G3 is selected as the ventilation duct ventilation volume. ......

[0117] When Fn-1≤F<Fn, the first preset ventilation duct ventilation volume Gn is selected as the ventilation duct ventilation volume;

[0118] Specifically, there is a preset flame detection device. The flame device consists of a flame detector, signal transmission components and cables, junction boxes, flame detection cabinets, analysis and engineering tools, power supplies, installation accessories, and necessary cooling systems, etc. The flame detection device analyzes and processes the collected flame signals or real-time video images: Photoelectric flame detectors usually adopt signal processing units, which undergo various processes such as frequency detection, intensity detection, and loop detection, and output the quality status signals of the flame detector. At the same time, the settings and data recording functions of the flame detector are realized through special software; Image-type flame detectors adopt signal processing units, and the detection of the target flame is realized through image processing technology; At the same time, special software is used, combined with hardware devices to realize functions such as setting of the flame detector, video browsing, video and data recording and playback, etc.

[0119] When adjusting the fuel injection volume of the oil gun according to the number of times of furnace flame flicker, determine the number of times of furnace flame flicker H, preset the furnace flame flicker number matrix H0, and set H0(H1, H2, H3,..., Hn), where H1 is the first preset number of times of furnace flame flicker, H2 is the second preset number of times of furnace flame flicker, H3 is the third preset number of times of furnace flame flicker,..., Hn is the nth preset number of times of furnace flame flicker, and H1 < H2 < H3 <... < Hn.

[0120] Preset the oil gun fuel injection volume matrix I0, and set I0(I1, I2, I3, In), where I1 is the first preset oil gun fuel injection volume, I2 is the second preset oil gun fuel injection volume, I3 is the third preset oil gun fuel injection volume,..., In is the nth preset oil gun fuel injection volume, and I1 < I2 < I3 <... < In.

[0121] When H < H1, select the first preset oil gun fuel injection volume I1 as the oil gun fuel injection volume.

[0122] When H1 ≤ H < H2, select the second preset oil gun fuel injection volume I2 as the oil gun fuel injection volume.

[0123] When H2 ≤ H < H3, select the third preset oil gun fuel injection volume I3 as the oil gun fuel injection volume. ......

[0125] When Hn - 1 ≤ H < Hn, select the fourth preset oil gun fuel injection volume In as the oil gun fuel injection volume.

[0126] It is understood that the above embodiments have preset flame feature recognition standards, which include the standard shape of black flame head and the standard shape of flame flickering. The ventilation volume and oil gun spray volume are adjusted by the two flame features to ensure the stability of the flame in the furnace and avoid the state of unstable gas pressure caused by excessive oxygen content due to large ventilation volume or excessive cold air. In addition, the amount of water entering the economizer can be controlled by the brightness of the flame in the furnace to ensure the normal operation of water circulation in the process and to avoid wasting resources.

[0127] Specifically, the corrected ventilation duct ventilation volume K and the real-time ventilation duct ventilation volume G are obtained, and the oxygen content value matrix J is obtained. J (J1, J2, J3, ..., Jn) is set, where J1 is the preset first oxygen content value, J2 is the preset second oxygen content value, J3 is the preset third oxygen content value, ..., Jn is the preset nth oxygen content value.

[0128] The ventilation compensation coefficient L of the preset ventilation duct is set as L(L1, L2, L3, ..., Ln), where L1 is the preset ventilation compensation coefficient of the first ventilation duct, L2 is the preset ventilation compensation coefficient of the second ventilation duct, L3 is the preset ventilation compensation coefficient of the third ventilation duct, ..., Ln is the preset ventilation compensation coefficient of the nth ventilation duct.

[0129] When J < J1, the corrected ventilation volume of the ventilation duct is K = L1 * G1.

[0130] When J1≤J<J2, the corrected ventilation volume of the ventilation duct is K=L2*G2.

[0131] When J2≤J<J3, the corrected ventilation volume of the ventilation duct is K=L3*G3.

[0132] ......

[0133] When Jn-1≤J<Jn, the corrected ventilation volume of the ventilation duct is K=Ln*Gn.

[0134] Specifically, the corrected fuel injection quantity M and the real-time fuel injection quantity I are obtained, and the pressure drop rate matrix N is obtained. N(N1, N2, N3, ..., Nn) is set, where N1 is the preset first pressure drop rate, N2 is the preset second pressure drop rate, N3 is the preset third pressure drop rate, ..., Nn is the preset nth pressure drop rate.

[0135] The preset oil gun injection quantity compensation coefficient P is set as P(P1, P2, P3, ..., Pn), where P1 is the preset first oil gun injection quantity compensation coefficient, P2 is the preset second oil gun injection quantity compensation coefficient, P3 is the preset third oil gun injection quantity compensation coefficient, ..., Pn is the preset nth oil gun injection quantity compensation coefficient.

[0136] When N < N1, the corrected oil gun injection quantity M = P1 * I1.

[0137] When N1≤N<N2, the corrected oil gun injection quantity M=P2*I2.

[0138] When N2≤N<N3, the corrected oil gun injection quantity M=P3*I3.

[0139] ......

[0140] When Nn-1≤N<Nn, the corrected oil gun spray volume M=Pn*In.

[0141] Obtain the ventilation volume Q of the ventilation duct after secondary correction, and the real-time ventilation volume K of the ventilation duct.

[0142] The ventilation secondary compensation coefficient R of the preset ventilation duct is set as R(R1, R2, R3, ..., Rn), where R1 is the preset secondary compensation coefficient of the first ventilation duct, R2 is the preset secondary compensation coefficient of the second ventilation duct, R3 is the preset secondary compensation coefficient of the third ventilation duct, ..., Rn is the preset secondary compensation coefficient of the nth ventilation duct.

[0143] When N < N1, the ventilation volume of the ventilation duct after the second correction is Q = R1 * K1.

[0144] When N1≤N<N2, the ventilation volume of the ventilation duct after the second correction is Q=R2*K2.

[0145] When N2≤N<N3, the ventilation volume of the ventilation duct after the second correction is Q=R3*K3.

[0146] ......

[0147] When Nn-1≤N<Nn, the ventilation volume of the ventilation duct after the second correction is Q=Rn*Kn.

[0148] It is understandable that in the above embodiments, the ventilation volume compensation coefficient and the oil injection volume compensation coefficient are set by the oxygen content change value and the air pressure drop rate. The ventilation volume is corrected once by the oxygen content change and then corrected a second time by the air pressure change. This avoids the air pressure instability caused by unstable ventilation volume, which could lead to the overflow of furnace flames or flue gas and endanger the safety of operators. At the same time, the oil gun injection volume is corrected when the air pressure drop rate is abnormal to prevent fire extinguishing caused by air pressure drop.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A peak-shaving method for a stable combustion burner, characterized in that, The method includes; The load rate range of the generator set during deep peak shaving is obtained, and the coal feed rate of the coal mill is controlled by comparing the load rate range with the standard operating parameters. Based on the current coal feed rate of the coal mill, determine the number of media atomizing oil guns to be called. There are preset flame feature recognition standards, which include the standard shape of black flame head and the standard shape of flame flickering; Based on flame feature recognition standards, the length of the black flame head in the furnace during depth peaking is determined by the flame detection device, and the ventilation volume of the ventilation pipe is controlled according to the length of the black flame head in the furnace. Based on flame feature recognition standards, a flame detection device determines the number of times the furnace flame flashes during depth peak adjustment, and controls the amount of oil sprayed from the oil gun according to the number of times the furnace flame flashes. The brightness of the flame in the furnace during deep peak shaving is determined by the flame detection device, and the economizer water inlet data is adjusted based on the brightness of the flame in the furnace during deep peak shaving. Obtain the oxygen content and adjust the ventilation volume of the ventilation duct based on the oxygen content data; The main air pressure drop rate is obtained, and the ventilation volume of the ventilation pipe and the oil injection volume of the oil gun are adjusted according to the main air pressure drop rate.

2. The peak-shaving method for a stable combustion burner according to claim 1, characterized in that, When controlling the coal feed rate of the coal mill based on the load rate range of the generator set during deep peak shaving, the load rate range value A of the generator set during deep peak shaving is determined, and the load rate range value matrix A0 is preset. A0 (A1, A2, A3, ..., An) is set, where A1 is the first preset load rate range value, A2 is the second preset load rate range value, A3 is the third preset load rate range value, ..., An is the nth preset load rate range value, and A1 < A2 < A3 < ... < An; The coal feed rate matrix B of the preset coal mill is defined as B0 (B1, B2, B3, ..., Bn), where B1 is the coal feed rate of the first preset coal mill, B2 is the coal feed rate of the second preset coal mill, B3 is the coal feed rate of the third preset coal mill, ..., Bn is the coal feed rate of the nth preset coal mill, and B1 < B2 < B3 < ... < Bn; The coal feed rate of the coal mill is set according to the relationship between the load rate range value A of the generator set during deep peak shaving and the coal feed rate of each preset coal mill: When A < A1, the coal feed rate B1 of the first preset coal mill is selected as the coal feed rate of the coal mill. When A1≤A<A2, the coal feed rate B2 of the second preset coal mill is selected as the coal feed rate of the coal mill; When A2≤A<A3, the coal feed rate B3 of the third preset coal mill is selected as the coal feed rate of the coal mill. ...... When An-1≤A<An, the coal feed rate Bn of the nth preset coal mill is selected as the coal feed rate of the coal mill.

3. The peak-shaving method for a stable combustion burner according to claim 2, characterized in that, A matrix C is defined for the number of media atomizing oil guns to be used, with C0 (C1, C2, C3, ..., Cn), where C1 is the number of the first preset media atomizing oil gun used, C2 is the number of the second preset media atomizing oil gun used, ..., Cn is the number of the nth preset media atomizing oil gun used, and C1 < C2 < C3 < ... < Cn. The number of media atomizing oil guns to be called is set according to the relationship between the coal feed rate matrix C of the coal mill and the media atomizing oil gun call quantity matrix: When B < B1, the coal feed rate C1 of the first preset coal mill is selected as the number of times the medium atomizing oil gun is called. When B1≤B<B2, the coal feed rate C2 of the second preset coal mill is selected as the number of times the medium atomizing oil gun is called. When B2≤B<B3, the coal feed rate C3 of the third preset coal mill is selected as the number of times the medium atomizing oil gun is called. ...... When Bn-1≤B<Bn, the coal feed rate Cn of the nth preset coal mill is selected as the number of times the medium atomizing oil gun is called.

4. The peak-shaving method for a stable combustion burner according to claim 3, characterized in that: A flame television is pre-installed. When adjusting the economizer water inlet based on the brightness of the furnace flame, the brightness level D of the furnace flame is determined, and the preset furnace flame brightness level is determined. Matrix D0, defined as D0(D1, D2, D3, ..., Dn), where D1 is the first preset furnace flame brightness, D2 is the second preset furnace flame brightness, D3 is the third preset furnace flame brightness, ..., Dn is the nth preset furnace flame brightness, and D1 < D2 < D3 < ... < Dn; A preset economizer inlet water volume matrix E0 is defined as E0(E1, E2, E3, En), where E1 is the first preset economizer inlet water volume, E2 is the second preset economizer inlet water volume, E3 is the third preset economizer inlet water volume, ..., En is the nth preset economizer inlet water volume, and E1 < E2 < E3 < ... < En; When D < D1, the first preset economizer water inlet E1 is selected as the economizer water inlet. When D1≤D<D2, the second preset economizer water inlet E2 is selected as the economizer water inlet. When D2≤D<D3, the third preset economizer water inlet E3 is selected as the economizer water inlet. ...... When Dn-1≤D<Dn, the nth preset economizer water inlet amount En is selected as the economizer water inlet amount.

5. The peak-shaving method for a stable combustion burner according to claim 4, characterized in that: A flame detection device is pre-installed. When adjusting the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace, the length F of the black flame head in the furnace is determined. A pre-installed matrix F0 of the length of the black flame head in the furnace is set, and F0(F1, F2, F3, ..., Fn) is defined, where F1 is the first pre-installed length of the black flame head in the furnace, F2 is the second pre-installed length of the black flame head in the furnace, F3 is the third pre-installed length of the black flame head in the furnace, ..., Fn is the nth pre-installed length of the black flame head in the furnace, and F1 < F2 < F3 < ... < Fn; A preset ventilation duct ventilation volume matrix G0 is defined as G0(G1, G2, G3, ..., Gn), where G1 is the first preset ventilation duct ventilation volume, G2 is the second preset ventilation duct ventilation volume, G3 is the third preset ventilation duct ventilation volume, ..., Gn is the nth preset ventilation duct ventilation volume, and G1 < G2 < G3 < ... < Gn; The ventilation volume of the ventilation pipe is set according to the relationship between the length F of the black flame head in the furnace and the preset lengths of the black flame heads in each furnace: When F < F1, the first preset ventilation duct ventilation volume G1 is selected as the ventilation volume of the ventilation duct; When F1≤F<F2, the second preset ventilation duct ventilation volume G2 is selected as the ventilation duct ventilation volume; When F2≤F<F3, the third preset ventilation duct ventilation volume G3 is selected as the ventilation duct ventilation volume; ...... When Fn-1≤F<Fn, the ventilation volume Gn of the nth preset ventilation duct is selected as the ventilation volume of the ventilation duct.

6. The peak-shaving method for a stable combustion burner according to claim 5, characterized in that, The system includes: A flame detection device is pre-installed. When adjusting the oil spray volume of the oil gun according to the number of times the furnace flame flashes, the number of times the furnace flame flashes H is determined, and a pre-installed furnace flame flash number matrix H0 is set, H0(H1, H2, H3, ..., Hn), where H1 is the first pre-installed furnace flame flash number, H2 is the second pre-installed furnace flame flash number, H3 is the third pre-installed furnace flame flash number, ..., Hn is the nth pre-installed furnace flame flash number, and H1 < H2 < H3 < ... < Hn; A preset fuel injection quantity matrix I0 is defined as I0(I1, I2, I3, In), where I1 is the first preset fuel injection quantity, I2 is the second preset fuel injection quantity, I3 is the third preset fuel injection quantity, ..., In is the nth preset fuel injection quantity, and I1 < I2 < ... I3 < ... < In; When H < H1, the first preset oil gun injection quantity I1 is selected as the oil gun injection quantity; When H1≤H<H2, the second preset oil gun injection quantity I2 is selected as the oil gun injection quantity; When H2≤H<H3, the third preset oil gun injection quantity I3 is selected as the oil gun injection quantity; ...... When Hn-1≤H<Hn, the nth preset oil gun injection quantityIn is selected as the oil gun injection quantity.

7. A peak-shaving method for a stable combustion burner according to claim 6, characterized in that: Obtain the corrected ventilation duct ventilation volume K, the real-time ventilation duct ventilation volume G, obtain the oxygen content value matrix J, and set J (J1, J2, J3, ..., Jn), where J1 is the preset first oxygen content value, J2 is the preset second oxygen content value, J3 is the preset third oxygen content value, ..., Jn is the preset nth oxygen content value; The ventilation compensation coefficient L of the preset ventilation duct is set as L(L1, L2, L3, ..., Ln), where L1 is the preset ventilation compensation coefficient of the first ventilation duct, L2 is the preset ventilation compensation coefficient of the second ventilation duct, L3 is the preset ventilation compensation coefficient of the third ventilation duct, ..., Ln is the preset ventilation compensation coefficient of the nth ventilation duct. When J < J1, the corrected ventilation volume of the ventilation duct is K = L1 * G1; When J1≤J<J2, the corrected ventilation volume of the ventilation duct is K=L2*G2; When J2≤J<J3, the corrected ventilation volume of the ventilation duct is K=L3*G3; ...... When Jn-1≤J<Jn, the corrected ventilation volume of the ventilation duct is K=Ln*Gn.

8. The peak-shaving method for a stable combustion burner according to claim 7, characterized in that: Get the corrected fuel injection volume M, the real-time fuel injection volume I, and the pressure drop rate matrix N. Set N(N1, N2, N3, ..., Nn), where N1 is the preset first pressure drop rate, N2 is the preset second pressure drop rate, N3 is the preset third pressure drop rate, ..., Nn is the preset nth pressure drop rate. The preset oil gun injection quantity compensation coefficient P is set as P(P1, P2, P3, ..., Pn), where P1 is the preset first oil gun injection quantity compensation coefficient, P2 is the preset second oil gun injection quantity compensation coefficient, P3 is the preset third oil gun injection quantity compensation coefficient, ..., Pn is the preset nth oil gun injection quantity compensation coefficient. When N < N1, the corrected oil gun injection quantity M = P1 * I1; When N1≤N<N2, the corrected oil gun injection quantity M=P2*I2; When N2≤N<N3, the corrected oil gun injection quantity M=P3*I3; ...... When Nn-1≤N<Nn, the corrected oil gun injection quantity M=Pn*In; Obtain the ventilation volume Q of the ventilation duct after secondary correction, and the real-time ventilation volume K of the ventilation duct. The ventilation secondary compensation coefficient R of the preset ventilation duct is set as R(R1, R2, R3, ..., Rn), where R1 is the preset secondary compensation coefficient of the first ventilation duct, R2 is the preset secondary compensation coefficient of the second ventilation duct, R3 is the preset secondary compensation coefficient of the third ventilation duct, ..., Rn is the preset secondary compensation coefficient of the nth ventilation duct. When N < N1, the ventilation volume of the ventilation duct after the second correction is Q = R1 * K1; When N1≤N<N2, the ventilation volume of the ventilation duct after the second correction is Q=R2*K2; When N2≤N<N3, the ventilation volume of the ventilation duct after the second correction is Q=R3*K3; ...... When Nn-1≤N<Nn, the ventilation volume of the ventilation duct after the second correction is Q=Rn*Kn.

9. A peak-shaving system for a stable-fire burner, used to execute a peak-shaving method for a stable-fire burner as described in any one of claims 1-8, characterized in that, include: The operation module obtains the load rate range value of the generator set during deep peak shaving, and controls the coal feed rate of the coal mill by comparing the load rate range value with the standard operating parameters. Based on the current coal feed rate of the coal mill, it determines the type of oil gun used in the stable combustion burner, controls the ventilation volume of the ventilation pipe according to the length of the black flame head in the furnace, adjusts the water inlet data of the economizer based on the brightness of the furnace flame during deep peak shaving, and controls the oil spray volume of the oil gun according to the number of times the furnace flame flashes. The correction module acquires the oxygen content and adjusts the ventilation volume of the ventilation duct based on the oxygen content data; it also acquires the main air pressure drop rate and adjusts the ventilation volume of the ventilation duct and the oil gun injection volume based on the main air pressure drop rate.

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