A method and system for adjusting air-powder analysis

Abstract

This invention relates to the field of coal combustion technology, specifically to a method and system for adjusting air-coal mixture analysis. The method includes: obtaining the standard air volume and standard pulverized coal concentration of the boiler primary air duct; obtaining a primary air-coal mixture standard ratio A based on the standard air volume and standard pulverized coal concentration; obtaining primary air-coal mixture data and boiler combustion data; determining the primary air-coal mixture uniformity level based on the primary air-coal mixture data and boiler combustion data; and adjusting the primary air-coal mixture standard ratio A based on the primary air-coal mixture uniformity level. This invention determines the primary air-coal mixture uniformity level by judging the difference in the air-coal mixture ratio between the inlet and outlet of the primary air duct. If the ratio is uniform, no adjustment is made; if it is uneven, adjustment is made, ensuring that the air-coal mixture ratio of the primary air duct is within the range of the primary air-coal mixture standard ratio. This avoids the problem of excessive deviation in primary air duct distribution leading to safety risks in the pulverizing system and reduced boiler combustion efficiency.

Description

Technical Field

[0001] This invention relates to the field of coal combustion technology, and more specifically, to a method and system for adjusting air-coal combustion analysis. Background Technology

[0002] Currently, large-capacity power plant boilers are generally equipped with direct-fired pulverizing systems. The problem of large air-coal distribution deviation in the primary air duct at the coal mill outlet is common, and the large air-coal distribution deviation directly limits the unit's flexible operation.

[0003] Deviations in the primary air duct's coal distribution directly impact the safe operation of the pulverizing system. For example, primary air ducts with the lowest air velocity are prone to coal dust settling, and coal dust accumulation can occur in horizontal sections. During mill start-up or shutdown, the significant system disturbances may lead to coal dust spontaneous combustion or explosions, potentially causing safety accidents that could affect unit operation. Furthermore, primary air ducts with low air velocity are also prone to coal dust blockage, which can result in fires or burner damage.

[0004] Therefore, there is an urgent need for a method and system for analyzing and adjusting the air-powder ratio to reasonably adjust the air-powder ratio, avoid deviations in the air-powder distribution of the primary air duct, ensure the safe operation of the powder-making system, and improve production efficiency. Summary of the Invention

[0005] In view of this, the present invention proposes a method and system for air-coal analysis and adjustment, mainly to solve the problem in the prior art where deviations in the distribution of air and coal in the primary air duct affect the safe operation of the pulverizing system and reduce the boiler combustion efficiency.

[0006] In one aspect, the present invention proposes a method for adjusting air-powder analysis, the method comprising:

[0007] Obtain the standard air volume and standard pulverized coal concentration for the boiler primary air duct;

[0008] The primary air-coal powder standard ratio A is obtained based on the standard air volume and standard coal powder concentration of the primary air duct.

[0009] Acquire primary air duct coal data and boiler combustion data;

[0010] The uniformity level of primary air-coal mixture is determined based on primary air duct data and boiler combustion data.

[0011] Adjust the primary air-powder standard ratio A according to the uniformity level of the primary air-powder.

[0012] In some embodiments of this application, the primary air duct air-powder data includes: primary air duct inlet air volume, primary air duct outlet air volume, primary air duct inlet coal powder concentration, and primary air duct outlet coal powder concentration.

[0013] Boiler combustion data includes: adjustable orifice core plate opening, carbon content in flue gas fly ash, oxygen content in flue gas, and air velocity in primary air ducts.

[0014] In some embodiments of this application, determining the uniformity level of primary air-coal mixture based on primary air duct data and boiler combustion data includes:

[0015] Obtain the air volume and pulverized coal concentration at the outlet of the primary air duct;

[0016] The air-to-coal ratio Aa at the outlet of the primary air duct is derived from the air volume and the coal powder concentration at the outlet of the primary air duct.

[0017] Obtain the adjustable core plate opening D0, and preset the first preset air-powder ratio A1, the second preset air-powder ratio A2, the third preset air-powder ratio A3, and the fourth preset air-powder ratio A4, where A1 > A2 > A3 > A4; preset the first preset adjustment coefficient a1, the second preset adjustment coefficient a2, the third preset adjustment coefficient a3, and the fourth preset adjustment coefficient a4, where 1.1 > a1 > a2 > 1 > a3 > a4 > 0.9;

[0018] When Aa≥A1, the first preset adjustment coefficient a1 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a1.

[0019] When A1>Aa≥A2, the second preset adjustment coefficient a2 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a2.

[0020] When A2>Aa≥A3, the third preset adjustment coefficient a3 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a3.

[0021] When A3>Aa≥A4, the fourth preset adjustment coefficient a4 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a4.

[0022] In some embodiments of this application, after selecting the i-th preset adjustment coefficient ai to adjust the adjustable core plate opening D0, i = 1, 2, 3, 4, and obtaining the adjusted adjustable core plate opening as D0*ai, the method further includes:

[0023] Obtain the inlet air volume and inlet coal powder concentration of the primary air duct;

[0024] The air-coal ratio Ab at the inlet of the primary air duct is obtained based on the inlet air volume and the inlet coal powder concentration of the primary air duct.

[0025] A first preset standard deviation of air-powder B1 and a second preset standard deviation of air-powder B2 are set in advance, and B1 > B2 > 0;

[0026] The pre-set primary air-powder uniformity level includes: uniform and non-uniform;

[0027] When |Ab-Aa|>B1 or |Ab-Aa|<B2, the uniformity level of the primary air-powder is determined to be uneven, and the primary air-powder ratio A needs to be adjusted.

[0028] When B1≥|Ab-Aa|≥B2, the uniformity level of the primary air-powder is determined to be uniform, and the primary air-powder ratio A does not need to be adjusted.

[0029] In some embodiments of this application, when the uniformity level of the primary air-coal mixture is determined to be non-uniform and the primary air-coal mixture standard ratio A needs to be adjusted, the following steps are included:

[0030] Obtain the carbon content (C0) of flue gas fly ash;

[0031] The first preset carbon content of flue gas fly ash C1, the second preset carbon content of flue gas fly ash C2, the third preset carbon content of flue gas fly ash C3, and the fourth preset carbon content of flue gas fly ash C4 are preset, and C1 > C2 > C3 > C4; the first preset adjustment coefficient c1, the second preset adjustment coefficient c2, the third preset adjustment coefficient c3, and the fourth preset adjustment coefficient c4 are preset, and 1.1 > c1 > c2 > 1 > c3 > c4 > 0.9;

[0032] When C0≥C1, the first preset adjustment coefficient c1 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c1.

[0033] When C1>C0≥C2, the second preset adjustment coefficient c2 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c2.

[0034] When C2>C0≥C3, the third preset adjustment coefficient c3 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c3.

[0035] When C3>C0≥C4, the fourth preset adjustment coefficient c4 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c4.

[0036] In some embodiments of this application, after selecting the i-th preset adjustment coefficient ci to adjust the primary air duct inlet air-powder ratio Ab, i = 1, 2, 3, 4, and obtaining the adjusted primary air duct inlet air-powder ratio as Ab*ci, the method further includes:

[0037] Obtain the oxygen content E0 in the flue gas;

[0038] The first preset flue gas oxygen content E1, the second preset flue gas oxygen content E2, the third preset flue gas oxygen content E3, and the fourth preset flue gas oxygen content E4 are preset, and E1 > E2 > E3 > E4; the first preset adjustment coefficient e1, the second preset adjustment coefficient e2, the third preset adjustment coefficient e3, and the fourth preset adjustment coefficient e4 are preset, and 0.9 < e1 < e2 < 1 < e3 < e4 < 1.1;

[0039] When E0≥E1, the first preset adjustment coefficient e1 is selected to adjust the air-powder ratio Ab*ci at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*e1.

[0040] When E1>E0≥E2, the second preset adjustment coefficient e2 is selected to adjust the air-powder ratio Ab*ci at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*e2.

[0041] When E2>E0≥E3, the third preset adjustment coefficient e3 is selected to adjust the air-powder ratio Ab*ci at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*e3.

[0042] When E3>E0≥E4, the fourth preset adjustment coefficient e4 is selected to adjust the air-powder ratio Ab*ci at the primary air duct inlet. The adjusted air-powder ratio at the primary air duct inlet is Ab*ci*e4.

[0043] In some embodiments of this application, after selecting the i-th preset adjustment coefficient ei to adjust the air-powder ratio Ab*ci at the primary air duct inlet, i = 1, 2, 3, 4, and obtaining the adjusted air-powder ratio at the primary air duct inlet as Ab*ci*ei, the method further includes:

[0044] Obtain the duct velocity H0;

[0045] The first preset wind speed H1, the second preset wind speed H2, the third preset wind speed H3, and the fourth preset wind speed H4 are preset, and H1 > H2 > H3 > H4; the first preset adjustment coefficient h1, the second preset adjustment coefficient h2, the third preset adjustment coefficient h3, and the fourth preset adjustment coefficient h4 are preset, and 0.9 < h1 < h2 < 1 < h3 < h4 < 1.1;

[0046] When H0≥H1, the first preset adjustment coefficient h1 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h1.

[0047] When H1>H0≥H2, the second preset adjustment coefficient h2 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h2.

[0048] When H2>H0≥H3, the third preset adjustment coefficient h3 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h3.

[0049] When H3>H0≥H4, the fourth preset adjustment coefficient h4 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h4.

[0050] The primary air duct inlet air-powder ratio Ab*ci*ei is adjusted by selecting the i-th preset correction coefficient hi, i = 1, 2, 3, 4, and the adjusted primary air duct inlet air-powder ratio Ab*ci*ei*hi is taken as the final primary air-powder standard ratio A0.

[0051] In another aspect, the present invention proposes a system for adjusting the blending amount of different coal types, the system comprising:

[0052] The information acquisition module is used to acquire the standard air volume and standard pulverized coal concentration of the boiler primary air duct, as well as the air-coal duct data and boiler combustion data.

[0053] The information storage module is used to store data from the information acquisition module;

[0054] The information processing module receives data from the information storage module, obtains the primary air-coal standard ratio A based on the standard air volume and standard pulverized coal concentration of the primary air duct, and adjusts the primary air-coal standard ratio A based on the primary air duct air-coal data and boiler combustion data.

[0055] In some embodiments of this application, when the information processing module adjusts the primary air-coal standard ratio A based on primary air duct air-coal data and boiler combustion data, it further includes:

[0056] The uniformity level of primary air-coal mixture is determined based on primary air duct data and boiler combustion data.

[0057] Adjust the primary air-powder standard ratio A according to the uniformity level of the primary air-powder.

[0058] In some embodiments of this application, the primary air duct air-powder data includes: primary air duct inlet air volume, primary air duct outlet air volume, primary air duct inlet coal powder concentration, and primary air duct outlet coal powder concentration.

[0059] Boiler combustion data includes: adjustable orifice core plate opening, carbon content in flue gas fly ash, oxygen content in flue gas, and air velocity in primary air ducts.

[0060] Compared with the prior art, the present invention has the following beneficial effects: The present invention obtains the primary air-coal ratio A by acquiring the standard air volume and standard pulverized coal concentration of the primary air duct, and then determines the uniformity level of the primary air-coal ratio by acquiring the air-coal data of the primary air duct and the boiler combustion data. If the primary air-coal ratio is uniform, no adjustment is made to the primary air-coal ratio; if the primary air-coal ratio is non-uniform, the primary air-coal ratio is adjusted. In this embodiment, the difference between the air-coal ratios at the inlet and outlet of the primary air duct is used to determine the uniformity level of the primary air-coal ratio. If it is uniform, no adjustment is made; if it is non-uniform, adjustment is made. This ensures that the air-coal ratio of the primary air duct is within the range of the standard primary air-coal ratio, thereby avoiding the problem of excessive deviation in the primary air duct distribution leading to safety risks in the pulverizing system and reducing boiler combustion efficiency. Attached Figure Description

[0061] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. In the drawings:

[0062] Figure 1 A flowchart of a method for adjusting air-powder analysis provided in an embodiment of the present invention;

[0063] Figure 2 This is a functional block diagram of a wind-dust analysis and adjustment system provided in an embodiment of the present invention. Detailed Implementation

[0064] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0065] See Figure 1 As shown, this embodiment provides a method for adjusting air-powder analysis, including:

[0066] S100: Obtain the standard air volume and standard pulverized coal concentration of the boiler primary air duct;

[0067] S200: The primary air-coal powder standard ratio A is obtained based on the standard air volume and standard coal powder concentration of the primary air duct;

[0068] S300: Acquire primary air duct coal data and boiler combustion data;

[0069] S400: Determine the uniformity level of primary air-coal mixture based on primary air duct air-coal data and boiler combustion data;

[0070] S500: Adjust the primary air-powder standard ratio A according to the primary air-powder uniformity level.

[0071] Specifically, in this embodiment, the primary air-coal standard ratio A is calculated. The uniformity level of the primary air-coal is determined by acquiring primary air duct air-coal data and boiler combustion data. Then, the primary air-coal standard ratio is adjusted based on the primary air-coal uniformity level, thereby ensuring that the air-coal ratio of the primary air duct is within the preset range of the primary air-coal standard ratio. This avoids excessive deviation in the primary air duct air-coal ratio, which could affect the safe operation of the pulverizing system, further improves the boiler's combustion efficiency, extends equipment service life, and reduces production costs.

[0072] In one specific embodiment of this application, the primary air duct air-powder data includes: primary air duct inlet air volume, primary air duct outlet air volume, primary air duct inlet coal powder concentration, and primary air duct outlet coal powder concentration.

[0073] Boiler combustion data includes: adjustable orifice core plate opening, carbon content in flue gas fly ash, oxygen content in flue gas, and air velocity in primary air ducts.

[0074] In one specific embodiment of this application, determining the uniformity level of primary air-coal mixture based on primary air duct data and boiler combustion data includes:

[0075] Obtain the air volume and pulverized coal concentration at the outlet of the primary air duct;

[0076] The air-to-coal ratio Aa at the outlet of the primary air duct is derived from the air volume and the coal powder concentration at the outlet of the primary air duct.

[0077] Obtain the adjustable core plate opening D0, and preset the first preset air-powder ratio A1, the second preset air-powder ratio A2, the third preset air-powder ratio A3, and the fourth preset air-powder ratio A4, where A1 > A2 > A3 > A4; preset the first preset adjustment coefficient a1, the second preset adjustment coefficient a2, the third preset adjustment coefficient a3, and the fourth preset adjustment coefficient a4, where 1.1 > a1 > a2 > 1 > a3 > a4 > 0.9;

[0078] When Aa≥A1, the first preset adjustment coefficient a1 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a1.

[0079] When A1>Aa≥A2, the second preset adjustment coefficient a2 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a2.

[0080] When A2>Aa≥A3, the third preset adjustment coefficient a3 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a3.

[0081] When A3>Aa≥A4, the fourth preset adjustment coefficient a4 is selected to adjust the adjustable core plate opening D0. The adjusted adjustable core plate opening is D0*a4.

[0082] In one specific embodiment of this application, after selecting the i-th preset adjustment coefficient ai to adjust the adjustable core plate opening D0, i = 1, 2, 3, 4, and obtaining the adjusted adjustable core plate opening as D0*ai, the method further includes:

[0083] Obtain the inlet air volume and inlet coal powder concentration of the primary air duct;

[0084] The air-coal ratio Ab at the inlet of the primary air duct is obtained based on the inlet air volume and the inlet coal powder concentration of the primary air duct.

[0085] A first preset standard deviation of air-powder B1 and a second preset standard deviation of air-powder B2 are set in advance, and B1 > B2 > 0;

[0086] The pre-set primary air-powder uniformity level includes: uniform and non-uniform;

[0087] When |Ab-Aa|>B1 or |Ab-Aa|<B2, the uniformity level of the primary air-powder is determined to be uneven, and the primary air-powder ratio A needs to be adjusted.

[0088] When B1≥|Ab-Aa|≥B2, the uniformity level of the primary air-powder is determined to be uniform, and the primary air-powder ratio A does not need to be adjusted.

[0089] It is understood that in this embodiment, the primary air-to-dust standard ratio A is calculated, and then air is supplied according to the primary air-to-dust standard ratio A. The air-to-dust data of the primary air duct is obtained during the air supply process. The difference between the actual air-to-dust ratio at the inlet and outlet of the primary air duct is calculated to see if it is within the range of the primary air-to-dust standard deviation. If it is, the primary air-to-dust uniformity level is uniform, and there is no need to adjust the primary air-to-dust standard ratio A. If it is not, then the primary air-to-dust standard ratio A needs to be adjusted.

[0090] In one specific embodiment of this application, when it is determined that the primary air-coal uniformity level is non-uniform and the primary air-coal standard ratio A needs to be adjusted, the following steps are included:

[0091] Obtain the carbon content (C0) of flue gas fly ash;

[0092] The first preset carbon content of flue gas fly ash C1, the second preset carbon content of flue gas fly ash C2, the third preset carbon content of flue gas fly ash C3, and the fourth preset carbon content of flue gas fly ash C4 are preset, and C1 > C2 > C3 > C4; the first preset adjustment coefficient c1, the second preset adjustment coefficient c2, the third preset adjustment coefficient c3, and the fourth preset adjustment coefficient c4 are preset, and 1.1 > c1 > c2 > 1 > c3 > c4 > 0.9;

[0093] When C0≥C1, the first preset adjustment coefficient c1 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c1.

[0094] When C1>C0≥C2, the second preset adjustment coefficient c2 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c2.

[0095] When C2>C0≥C3, the third preset adjustment coefficient c3 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c3.

[0096] When C3>C0≥C4, the fourth preset adjustment coefficient c4 is selected to adjust the air-powder ratio Ab at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*c4.

[0097] It is understood that in this embodiment, the carbon content of flue gas fly ash is obtained and a specific adjustment coefficient is selected to adjust the air-coal ratio Ab at the inlet of the primary air duct, so as to avoid combustion instability caused by the air-coal ratio not meeting the preset range, and further ensure the boiler combustion efficiency and safety.

[0098] In one specific embodiment of this application, after selecting the i-th preset adjustment coefficient ci to adjust the primary air duct inlet air-powder ratio Ab, i = 1, 2, 3, 4, and obtaining the adjusted primary air duct inlet air-powder ratio as Ab*ci, the method further includes:

[0099] Obtain the oxygen content E0 in the flue gas;

[0100] The first preset flue gas oxygen content E1, the second preset flue gas oxygen content E2, the third preset flue gas oxygen content E3, and the fourth preset flue gas oxygen content E4 are preset, and E1 > E2 > E3 > E4; the first preset adjustment coefficient e1, the second preset adjustment coefficient e2, the third preset adjustment coefficient e3, and the fourth preset adjustment coefficient e4 are preset, and 0.9 < e1 < e2 < 1 < e3 < e4 < 1.1;

[0101] When E0≥E1, the first preset adjustment coefficient e1 is selected to adjust the air-powder ratio Ab*ci at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*e1.

[0102] When E1>E0≥E2, the second preset adjustment coefficient e2 is selected to adjust the air-powder ratio Ab*ci at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*e2.

[0103] When E2>E0≥E3, the third preset adjustment coefficient e3 is selected to adjust the air-powder ratio Ab*ci at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*e3.

[0104] When E3>E0≥E4, the fourth preset adjustment coefficient e4 is selected to adjust the air-powder ratio Ab*ci at the primary air duct inlet. The adjusted air-powder ratio at the primary air duct inlet is Ab*ci*e4.

[0105] It is understood that in this embodiment, the air-coal ratio Ab at the primary air duct inlet is readjusted by obtaining the flue gas oxygen content and selecting the corresponding adjustment coefficient, so as to avoid over-oxygen combustion or oxygen-deficient combustion in the boiler caused by the air-coal ratio not meeting the preset range, and further ensure the combustion efficiency of the boiler.

[0106] In one specific embodiment of this application, after selecting the i-th preset adjustment coefficient ei to adjust the air-powder ratio Ab*ci at the primary air duct inlet, i = 1, 2, 3, 4, and obtaining the adjusted air-powder ratio at the primary air duct inlet as Ab*ci*ei, the method further includes:

[0107] Obtain the duct velocity H0;

[0108] The first preset wind speed H1, the second preset wind speed H2, the third preset wind speed H3, and the fourth preset wind speed H4 are preset, and H1 > H2 > H3 > H4; the first preset adjustment coefficient h1, the second preset adjustment coefficient h2, the third preset adjustment coefficient h3, and the fourth preset adjustment coefficient h4 are preset, and 0.9 < h1 < h2 < 1 < h3 < h4 < 1.1;

[0109] When H0≥H1, the first preset adjustment coefficient h1 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h1.

[0110] When H1>H0≥H2, the second preset adjustment coefficient h2 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h2.

[0111] When H2>H0≥H3, the third preset adjustment coefficient h3 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h3.

[0112] When H3>H0≥H4, the fourth preset adjustment coefficient h4 is selected to adjust the air-powder ratio Ab*ci*ei at the inlet of the primary air duct. The adjusted air-powder ratio at the inlet of the primary air duct is Ab*ci*ei*h4.

[0113] The primary air duct inlet air-powder ratio Ab*ci*ei is adjusted by selecting the i-th preset correction coefficient hi, i = 1, 2, 3, 4, and the adjusted primary air duct inlet air-powder ratio Ab*ci*ei*hi is taken as the final primary air-powder standard ratio A0.

[0114] It is understood that in this embodiment, the air-coal ratio at the inlet of the primary air duct is adjusted three times by obtaining the primary air duct wind speed and selecting the corresponding adjustment coefficient, thereby avoiding the instability of the primary air duct air-coal ratio due to unstable wind speed and further ensuring the boiler combustion efficiency.

[0115] See Figure 2 As shown, this embodiment provides a wind-dust analysis and adjustment system, including:

[0116] The information acquisition module is used to acquire the standard air volume and standard pulverized coal concentration of the boiler primary air duct, as well as the air-coal duct data and boiler combustion data.

[0117] The information storage module is used to store data from the information acquisition module;

[0118] The information processing module receives data from the information storage module, obtains the primary air-coal standard ratio A based on the standard air volume and standard pulverized coal concentration of the primary air duct, and adjusts the primary air-coal standard ratio A based on the primary air duct air-coal data and boiler combustion data.

[0119] In one specific embodiment of this application, when the information processing module adjusts the primary air-coal standard ratio A based on the primary air duct air-coal data and boiler combustion data, it further includes:

[0120] The uniformity level of primary air-coal mixture is determined based on primary air duct data and boiler combustion data.

[0121] Adjust the primary air-powder standard ratio A according to the uniformity level of the primary air-powder.

[0122] In one specific embodiment of this application, the primary air duct air-powder data includes: primary air duct inlet air volume, primary air duct outlet air volume, primary air duct inlet coal powder concentration, and primary air duct outlet coal powder concentration.

[0123] Boiler combustion data includes: adjustable orifice core plate opening, carbon content in flue gas fly ash, oxygen content in flue gas, and air velocity in primary air ducts.

[0124] It is understood that the heating air-coal analysis and adjustment system in this embodiment determines the uniformity level of the primary air duct air-coal ratio and adjusts the primary air duct air-coal standard ratio according to the uniformity level, thereby ensuring that the actual primary air duct air-coal ratio is within the preset range of the primary air duct air-coal standard ratio, thus avoiding the boiler combustion efficiency decrease due to deviations in the air-coal ratio of each primary air duct.

[0125] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0126] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0127] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0128] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0129] 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 it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method of wind powder analysis adjustment, characterized by, The method comprises the following steps: obtaining standard air volume and standard coal powder concentration of a primary air pipe of a boiler; obtaining primary air pipe wind powder data and boiler combustion data; the primary air pipe wind powder data comprises primary air pipe inlet air volume, primary air pipe outlet air volume, primary air pipe inlet coal powder concentration and primary air pipe outlet coal powder concentration; the boiler combustion data comprises adjustable shrinkable core plate opening, flue gas fly ash carbon content, flue gas oxygen content and primary air pipe wind speed; obtaining primary air pipe outlet air volume and primary air pipe outlet coal powder concentration; obtaining primary air pipe outlet air volume and primary air pipe outlet coal powder concentration; obtaining the adjustable shrinkable core plate opening D0, pre-setting first preset air powder ratio A1, second preset air powder ratio A2, third preset air powder ratio A3 and fourth preset air powder ratio A4, and A1>A2>A3>A4; pre-setting first preset adjustment coefficient a1, second preset adjustment coefficient a2, third preset adjustment coefficient a3 and fourth preset adjustment coefficient a4, and 1.1>a1>a2>1>a3>a4>0.9; when Aa≥A1, the first preset adjustment coefficient a1 is selected to adjust the adjustable shrinkable core plate opening D0, and the adjusted adjustable shrinkable core plate opening is D0*a1; when A1>Aa≥A2, the second preset adjustment coefficient a2 is selected to adjust the adjustable shrinkable core plate opening D0, and the adjusted adjustable shrinkable core plate opening is D0*a2; when A2>Aa≥A3, the third preset adjustment coefficient a3 is selected to adjust the adjustable shrinkable core plate opening D0, and the adjusted adjustable shrinkable core plate opening is D0*a3; when A3>Aa≥A4, the fourth preset adjustment coefficient a4 is selected to adjust the adjustable shrinkable core plate opening D0, and the adjusted adjustable shrinkable core plate opening is D0*a4; obtaining the primary air pipe inlet air volume and the primary air pipe inlet coal powder concentration; obtaining the primary air pipe inlet air volume and the primary air pipe inlet coal powder concentration; pre-setting first preset air powder standard difference value B1 and second preset air powder standard difference value B2, and B1>B2>0; pre-setting the primary air powder uniformity level comprises uniformity and non-uniformity; when |Ab-Aa|>B1 or |Ab-Aa|<B2, it is judged that the primary air powder uniformity level is non-uniform, and the primary air powder standard ratio A needs to be adjusted; when B1≥|Ab-Aa|≥B2, it is judged that the primary air powder uniformity level is uniform, and the primary air powder standard ratio A does not need to be adjusted; adjusting the primary air powder standard ratio A according to the primary air powder uniformity level; ​ The judgment of the primary air powder uniformity level is not uniform, and the primary air powder standard ratio A needs to be adjusted, comprising: obtaining the carbon content C0 of the flue gas fly ash; pre-setting the first preset flue gas fly ash carbon content C1, the second preset flue gas fly ash carbon content C2, the third preset flue gas fly ash carbon content C3, and the fourth preset flue gas fly ash carbon content C4, and C1>C2>C3>C4; pre-setting the first preset adjustment coefficient c1, the second preset adjustment coefficient c2, the third preset adjustment coefficient c3, and the fourth preset adjustment coefficient c4, and 1.1>c1>c2>1>c3>c4>0.9; when C0 is greater than or equal to C1, the first preset adjustment coefficient c1 is selected to adjust the primary air pipe inlet air powder ratio Ab, and the adjusted primary air pipe inlet air powder ratio is Ab*c1; when C1 is greater than C0 and C0 is greater than or equal to C2, the second preset adjustment coefficient c2 is selected to adjust the primary air pipe inlet air powder ratio Ab, and the adjusted primary air pipe inlet air powder ratio is Ab*c2; when C2 is greater than C0 and C0 is greater than or equal to C3, the third preset adjustment coefficient c3 is selected to adjust the primary air pipe inlet air powder ratio Ab, and the adjusted primary air pipe inlet air powder ratio is Ab*c3; when C3 is greater than C0 and C0 is greater than or equal to C4, the fourth preset adjustment coefficient c4 is selected to adjust the primary air pipe inlet air powder ratio Ab, and the adjusted primary air pipe inlet air powder ratio is Ab*c4.

2. The method of claim 1, wherein, After selecting the i-th preset adjustment coefficient ci to adjust the primary air pipe inlet air powder ratio Ab, i=1, 2, 3, 4, and obtaining the adjusted primary air pipe inlet air powder ratio Ab*ci, further comprising: obtaining the oxygen content E0 of the flue gas; pre-setting the first preset flue gas oxygen content E1, the second preset flue gas oxygen content E2, the third preset flue gas oxygen content E3, and the fourth preset flue gas oxygen content E4, and E1>E2>E3>E4; pre-setting the first preset adjustment coefficient e1, the second preset adjustment coefficient e2, the third preset adjustment coefficient e3, and the fourth preset adjustment coefficient e4, and 0.9 when E0 is greater than or equal to E1, the first preset adjustment coefficient e1 is selected to adjust the primary air pipe inlet air powder ratio Ab*ci, and the adjusted primary air pipe inlet air powder ratio is Ab*ci*e1; when E1 is greater than E0 and E0 is greater than or equal to E2, the second preset adjustment coefficient e2 is selected to adjust the primary air pipe inlet air powder ratio Ab*ci, and the adjusted primary air pipe inlet air powder ratio is Ab*ci*e2; when E2 is greater than E0 and E0 is greater than or equal to E3, the third preset adjustment coefficient e3 is selected to adjust the primary air pipe inlet air powder ratio Ab*ci, and the adjusted primary air pipe inlet air powder ratio is Ab*ci*e3; when E3 is greater than E0 and E0 is greater than or equal to E4, the fourth preset adjustment coefficient e4 is selected to adjust the primary air pipe inlet air powder ratio Ab*ci, and the adjusted primary air pipe inlet air powder ratio is Ab*ci*e4.

3. The method of claim 2, wherein, After selecting the i-th preset adjustment coefficient ei to adjust the primary air pipe inlet air powder ratio Ab*ci, i=1, 2, 3, 4, and obtaining the adjusted primary air pipe inlet air powder ratio Ab*ci*ei, further comprising: acquiring the primary air duct wind speed H0; pre-setting a first preset wind speed H1, a second preset wind speed H2, a third preset wind speed H3, and a fourth preset wind speed H4, and H1>H2>H3>H4; pre-setting a first preset adjustment coefficient h1, a second preset adjustment coefficient h2, a third preset adjustment coefficient h3, and a fourth preset adjustment coefficient h4, and 0.9<h1<h2<1<h3<h4<1.1; when H0≥H1, the first preset adjustment coefficient h1 is selected to adjust the primary air duct inlet wind-powder ratio Ab*ci*ei, and the adjusted primary air duct inlet wind-powder ratio is Ab*ci*ei*h1; when H1>H0≥H2, the second preset adjustment coefficient h2 is selected to adjust the primary air duct inlet wind-powder ratio Ab*ci*ei, and the adjusted primary air duct inlet wind-powder ratio is Ab*ci*ei*h2; when H2>H0≥H3, the third preset adjustment coefficient h3 is selected to adjust the primary air duct inlet wind-powder ratio Ab*ci*ei, and the adjusted primary air duct inlet wind-powder ratio is Ab*ci*ei*h3; when H3>H0≥H4, the fourth preset adjustment coefficient h4 is selected to adjust the primary air duct inlet wind-powder ratio Ab*ci*ei, and the adjusted primary air duct inlet wind-powder ratio is Ab*ci*ei*h4; when the i-th preset correction coefficient hi is selected to adjust the primary air duct inlet wind-powder ratio Ab*ci*ei, i=1, 2, 3, 4, the adjusted primary air duct inlet wind-powder ratio Ab*ci*ei*hi is taken as the final primary air-powder standard ratio A0.

4. A coal flow analysis adjustment system characterized by, The system comprises the method according to any one of claims 1-3. An information acquisition module is configured to acquire standard air volume and standard coal-powder concentration of a primary air duct of a boiler, and primary air duct wind-powder data and boiler combustion data; An information storage module is configured to store data of the information acquisition module; An information processing module is configured to receive data of the information storage module, to obtain a primary air-powder standard ratio A according to the standard air volume and the standard coal-powder concentration of the primary air duct, and to adjust the primary air-powder standard ratio A according to the primary air duct wind-powder data and the boiler combustion data.

5. The wind powder analysis adjustment system of claim 4, wherein, The information processing module, when adjusting the primary air-powder standard ratio A according to the primary air duct wind-powder data and the boiler combustion data, further comprises: judging a primary air-powder uniformity level according to the primary air duct wind-powder data and the boiler combustion data; adjusting the primary air-powder standard ratio A according to the primary air-powder uniformity level.

6. The wind powder analysis adjustment system of claim 5, wherein, The primary air duct wind-powder data comprises primary air duct inlet air volume, primary air duct outlet air volume, primary air duct inlet coal-powder concentration, and primary air duct outlet coal-powder concentration. The boiler combustion data comprises adjustable shrinkable core plate opening, flue gas fly ash carbon content, flue gas oxygen content, and primary air duct wind speed.

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