A coal blending and combustion method

Abstract

The present invention discloses a method for blending coal and burning, comprising the following steps: calculating a scheme through a coal blending and burning model, the model is based on an automatic power generation information collection system, using Data‑link and Process book software, deeply developing and utilizing the massive unit data of the PI database, calculating the coal price and power supply coal consumption results, selecting the optimal blending and burning scheme through the blending and burning model, determining the blending and burning mode according to the blending and burning model, and changing the blending and burning ratio of economic coal types through back grinding when the unit load changes, so as to achieve the purpose of maximizing the blending and burning benefits. The present invention, through the role of the coal blending and burning model and the automatic power generation collection system, it should be noted that through such a method, the optimal blending and burning scheme can be quickly and accurately calculated, which brings convenience to the enterprise's blending and burning, thereby reducing fuel costs, and can effectively improve the intelligent level of deep peak load management work, and provide effective support for plant-level decision-making.

Description

Technical Field

[0001] The invention relates to the technical field of coal blending and combustion, and in particular to a coal blending and combustion method. Background Art

[0002] In recent years, coal prices have continued to run at a high level. As the largest cost expenditure of thermal power plants, the cost of coal combustion has made the blending of economic coal with low calorific value an inevitable choice for enterprises to reduce costs. At the same time, in order to ensure the safe and stable operation of the power grid, Liaoning Power Grid issued a notice on the implementation of rotating standby auxiliary services in early 2019. Every day, power generation companies report the load capacity of each unit, select the designated units that can be increased to the maximum load reported within a unit time, and assess companies that cannot complete rotating standby. How to ensure load capacity while blending as much economic coal as possible to reduce fuel costs has become a new topic in the blending of coal in power plants.

[0003] The current coal blending and combustion method cannot accurately calculate a reasonable blending plan, and thus cannot calculate the minimum power supply coal consumption cost, resulting in the failure to reduce the cost of coal used by enterprises. In addition, when screening and discharging materials, the existing equipment cannot reasonably screen according to the size of the coal, and it is difficult to control the weight of the discharging materials during discharging, thereby increasing the loss rate and causing losses to the enterprise. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a coal blending and combustion method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A coal blending and combustion method comprises the following steps:

[0007] The calculation scheme is carried out through a coal blending model, the model being based on an automatic power generation information collection system;

[0008] Use Data-link and Process book software to deeply develop and utilize the massive unit data in the PI database to calculate the coal price and power supply coal consumption results;

[0009] The optimal burning scheme is selected by inputting coal type parameters according to the actual situation through the burning model;

[0010] The burning method is determined according to the burning model, and each burning scheme contains only two types of coal;

[0011] When the unit load changes, the burning ratio of economic coal types is changed through back grinding to maximize the burning efficiency.

[0012] After the sintering ratio is determined, the material is discharged through the screening discharge device.

[0013] Preferably, the combustion model can realize "one-click calculation" according to the coal storage situation, and input the coal type parameters according to the actual situation. The model calculates the coal consumption of power supply in the three load sections, the unit price of standard coal entering the furnace, and the unit power supply cost in turn.

[0014] Preferably, the co-firing method has the following characteristics: each co-firing scheme contains only two types of coal; each type of coal is loaded into a single bin and co-fired in the furnace, and the amount of coal in the operating coal mill is the same.

[0015] Preferably, the coal quality of the standby coal mill bin should be understood before backgrinding, and the mill can be started and backgrinding can be carried out only after routine inspection of the oil, cooling water, etc. of the standby mill is completed.

[0016] Preferably, the screening and discharging device comprises a box body, the top of the box body is fixedly connected with bolts, a feed port is opened at the top of the box body, a mounting spring is fixedly connected to the side of the box body away from the bolts, two fixed blocks are fixedly connected to the side of the box body located at the feed port, a rolling shaft is fixedly connected between the two fixed blocks, a fixed plate is rotatably connected to the rolling shaft, an electrode block is fixedly connected to one side of the fixed plate, and a collision mechanism is connected to one side of the box body;

[0017] A plurality of connecting cavities are provided on both sides of the box body, a first spring rod is fixedly connected in the connecting cavity, a screening plate is sleeved between the two first spring rods, a plurality of screening ports are provided on the screening plate, a first discharge port is provided on the screening plate, slide rails are fixedly connected on both sides of the top of the screening plate, a slide plate is slidably connected on the slide rail, a pull rod is fixedly connected to one side of the slide plate, a tension spring is fixedly connected to the inner side wall of the box body, a pull plate is fixedly connected to one side of the tension spring, and a second discharge port is provided on the pull plate;

[0018] The bottom of the pull plate is inlaid with a limiting groove, and a second spring rod is fixedly connected to the limiting groove. The outer wall of the second spring rod is sleeved with a sliding rod, and one side of the sliding rod is fixedly connected to a top plate. A plurality of telescopic springs are fixedly connected to the bottom of the inner wall of the box body, and a pressure plate is fixedly connected to the top of the telescopic spring. A loading box is placed on the top of the pressure plate, and a material taking port is opened on one side of the box body located at the loading box.

[0019] Preferably, the collision mechanism includes a protection box, a driving motor is fixedly connected to the interior of the protection box, an electrode sheet is fixedly connected to one side of the driving motor, an output end of the driving motor is rotatably connected to a rotating shaft, an outer wall sleeve of the rotating shaft is provided with a cam 1, the rotating shaft is connected to a transmission shaft through a conveyor belt transmission, and a cam 2 is provided on the outer wall sleeve of the transmission shaft.

[0020] Preferably, a sliding groove is opened on one side of the box body, the pull plate is slidably connected to the sliding groove, the screening opening of the screening plate becomes smaller as the screening plate goes down, and a connecting groove is opened on one side of the box body located on the screening plate, and the pull rod is slidably connected to the connecting groove.

[0021] Preferably, one end of the mounting spring is connected to the top of the box body, and the other end of the mounting spring is connected to one side of the fixing plate.

[0022] Preferably, the box body and the fixing plate are both provided with bolt grooves, and the bolts fix the fixing plate to the top of the box body through the bolt grooves. A plurality of transmission grooves are provided on one side of the box body, and the rotating shaft and the transmission shaft are rotatably connected to the transmission grooves.

[0023] Preferably, a pull rope is fixedly connected to one side of the pressure plate close to the material taking port, the other end of the pull rope is connected to one side of the top plate, and the box body is fixedly connected to the bottom of one side of the protective box with screws.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Through the role of coal blending model and automatic power generation data collection system, Data-link and Processbook software can be used to deeply develop and utilize the massive unit data of PI database, comprehensively consider the dual effects of the reduction of coal price entering the furnace and the increase of coal consumption for power supply after blending economic coal, and then obtain the minimum unit cost of power supply as the central goal, and then the model selects the optimal blending scheme. It should be noted that through such a method, the optimal blending scheme can be calculated quickly and accurately, which brings convenience to the enterprise's blending, thereby reducing fuel costs, and can effectively improve the intelligence level of deep peak-shaving management, provide effective support for plant-level decision-making, and provide reference for future fuel procurement coal types based on calculation results and coal storage conditions.

[0026] 2. Through the coordination between the internal parts of the screening and discharging device, by opening the fixed plate, the electrode block on one side of the fixed plate touches the electrode sheet, so that the driving motor is energized and rotated. While the driving motor rotates, it drives the rotating shaft, cam 1, conveyor belt, transmission shaft and cam 2 to rotate, thereby colliding with the bottom of the screening plate. At this time, we pour the fired materials into the box through the feed port. Because the screening port is smaller as the screening plate goes down, the larger materials are left on the top of the screening plate, and the smallest materials fall into the pull plate. It should be noted that through such a setting, after we determine the firing plan and method, we use this device to screen materials of appropriate size for combustion, avoiding the mixing of materials of different sizes and affecting the combustion efficiency. By rotating the driving motor, it collides with the bottom of the screening plate, avoiding the materials blocking the screening port when unloading, so that the materials cannot go down.

[0027] 3. After we have selected the materials of appropriate size, we will cooperate with the slide plate, pull rod, slide rail, discharge port 1 and discharge port 2, pull the pull rod, drive the slide plate to slide on the slide rail, and make the materials fall into the loading box through discharge port 1 and discharge port 2. When the loading box is full, the pressure plate will descend according to the action of the telescopic spring, and then pull the top plate to block the discharge port 2 to prevent the materials from falling down when taking the materials. It should be noted that through such a setting, quantitative material can be taken according to needs, which can avoid waste caused by taking too much on the one hand and insufficient material caused by taking too little on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A blending and burning flow chart of a coal blending and burning method proposed by the present invention;

[0029] Figure 2 A structural schematic diagram of a coal blending and combustion method proposed by the present invention;

[0030] Figure 3 A top schematic diagram of a coal blending and combustion method proposed by the present invention;

[0031] Figure 4 A schematic diagram of a screening plate for a coal blending and combustion method proposed by the present invention;

[0032] Figure 5 A schematic diagram of a slide plate and a pull rod of a coal blending and combustion method proposed by the present invention;

[0033] Figure 6 for Figure 2 Enlarged view of location A;

[0034] Figure 7 for Figure 2 Enlarged view of location B;

[0035] Figure 8 A top view of a coal blending and combustion method proposed by the present invention;

[0036] Fig. 9 This is a combustion model diagram of a coal blending and combustion method proposed in the present invention.

[0037] In the figure: 1 box body, 2 bolts, 3 fixing plate, 4 electrode block, 5 electrode sheet, 6 protection box, 7 driving motor, 8 conveyor belt, 9 rotating shaft, 10 cam 1, 11 transmission shaft, 12 cam 2, 13 pressure plate, 14 telescopic spring, 15 charging box, 16 tension spring, 17 pull plate, 18 screening plate, 19 slide plate, 20 pull rod, 21 screening port, 22 installation spring, 23 discharge port 1, 24 discharge port 2, 25 first spring rod, 26 slide rail, 27 limit groove, 28 second spring rod, 29 sliding rod, 30 top plate, 31 feed port, 32 rolling shaft. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Reference Figure 1-8 , a coal blending and combustion method, comprising the following steps:

[0040] The calculation scheme is carried out through the coal blending model, which is based on the automatic collection system of power generation information;

[0041] Use Data-link and Process book software to deeply develop and utilize the massive unit data in the PI database to calculate the coal price and power supply coal consumption results;

[0042] The optimal burning scheme is selected by inputting coal type parameters according to the actual situation through the burning model;

[0043] The burning method is determined according to the burning model, and each burning scheme contains only two types of coal;

[0044] When the unit load changes, the proportion of economic coal is changed by back-grinding to maximize the benefit of coal blending. Before back-grinding, the coal quality of the standby coal mill should be understood. After the routine inspection of the oil, cooling water, etc. of the standby mill is completed, the mill can be started and then back-grinding can be carried out. Through the coal blending model and the automatic power generation acquisition system, Data-link and Process book software can be used to deeply develop and utilize the massive unit data of the PI database, comprehensively consider the dual effects of the reduction of the coal price of the furnace and the increase of the coal consumption of power supply after the economic coal is blended, and then the minimum power supply unit cost is obtained as the central goal, and then the model selects the optimal blending scheme. It should be noted that through this method, the optimal blending scheme can be calculated quickly and accurately, which brings convenience to the enterprise's blending, thereby reducing fuel costs, can effectively improve the intelligent level of deep peak-shaving management, provide effective support for plant-level decision-making, and can provide reference for future fuel procurement coal types based on the calculation results and coal storage conditions. .

[0045] After the sintering ratio is determined, the material is discharged through the screening discharge device.

[0046] The combustion model can realize "one-click calculation" according to the coal storage situation, and input the coal type parameters according to the actual situation. The model calculates the coal consumption of the three load sections, the unit price of standard coal entering the furnace, and the unit power supply cost in turn.

[0047] The co-firing method has the following characteristics: each co-firing plan contains only two types of coal; each type of coal is loaded into a single bin and burned in the furnace, and the amount of coal in the running pulverizer is the same.

[0048] The screening and discharging device includes a box body 1, a bolt 2 is fixedly connected to the top of the box body 1, a feed port 31 is opened at the top of the box body 1, a mounting spring 22 is fixedly connected to the side of the box body 1 away from the bolt 2, one end of the mounting spring 22 is connected to the top of the box body 1, and the other end of the mounting spring 22 is connected to one side of a fixed plate 3, two fixed blocks are fixedly connected to the side of the box body 1 located at the feed port 31, a rolling shaft 32 is fixedly connected between the two fixed blocks, a fixed plate 3 is rotatably connected to the rolling shaft 32, bolt grooves are opened on the box body 1 and the fixed plate 3, the bolt 2 fixes the fixed plate 3 to the top of the box body 1 through the bolt groove, one end of the mounting spring 22 is connected to the top of the box body 1, and the other end of the mounting spring 22 is connected to one side of the fixed plate 3, one side of the fixed plate 3 is fixedly connected to an electrode block 4, and one side of the box body 1 is connected to a collision mechanism;

[0049] A plurality of connecting cavities are provided on both sides of the box body 1, and a first spring rod 25 is fixedly connected in the connecting cavity. A screening plate 18 is sleeved between the two first spring rods 25, and a plurality of screening ports 21 are provided on the screening plate 18. The lower the screening plate 18 is, the smaller the screening port 21 is. A discharge port 1 23 is provided on the screening plate 18. Slide rails 26 are fixedly connected to both sides of the top of the screening plate 18, and a slide plate 19 is slidably connected to the slide rail 26. A pull rod 20 is fixedly connected to one side of the slide plate 19. A connecting groove is provided on one side of the box body 1 located at the screening plate 18, and the pull rod 20 is slidably connected to the connecting groove. A tension spring 16 is fixedly connected to the inner side wall of the box body 1, and a pull plate 17 is fixedly connected to one side of the tension spring 16. A sliding groove is provided on one side of the box body 1, and the pull plate 17 is slidably connected to the sliding groove. A discharge port 2 24 is provided on the pull plate 17.

[0050] The bottom of the pull plate 17 is inlaid with a limiting groove 27, and a second spring rod 28 is fixedly connected to the limiting groove 27. The outer wall of the second spring rod 28 is sleeved with a sliding rod 29, and one side of the sliding rod 29 is fixedly connected to a top plate 30. The side of the pressing plate 13 close to the material taking port is fixedly connected to a pull rope, and the other end of the pull rope is connected to one side of the top plate 30. A plurality of telescopic springs 14 are fixedly connected to the bottom of the inner wall of the box body 1, and the top of the telescopic spring 14 is fixedly connected to the pressing plate 13. A charging box 15 is placed on the top of the pressing plate 13. A charging port is opened on one side of the box body 1 located at the charging box 15. When we have selected the material of the appropriate size, we can use the slide plate to 19, the cooperation between the pull rod 20, the slide rail 26, the discharge port 1 23 and the discharge port 2 24, pulling the pull rod 20, drives the slide plate 19 to slide on the slide rail 26, so that the material passes through the discharge port 1 23 and the discharge port 2 24 and falls into the loading box 15. When the loading box 15 is full, the pressure plate descends according to the action of the telescopic spring 14, and then the top plate 30 is pulled to make the top plate 30 block the discharge port 24 to prevent the material from falling when taking the material. It should be noted that through such an arrangement, quantitative material can be taken according to needs, on the one hand avoiding waste caused by taking too much, and on the other hand avoiding insufficient material due to taking too little.

[0051] The collision mechanism includes a protection box 6, a box body 1 is located at one side of the protection box 6 and is fixedly connected with a screw at the bottom, a driving motor 7 is fixedly connected inside the protection box 6, an electrode sheet 5 is fixedly connected to one side of the driving motor 7, an output end of the driving motor 7 is rotatably connected to a rotating shaft 9, an outer wall of the rotating shaft 9 is sleeved with a cam 10, the rotating shaft 9 is connected to a transmission shaft 11 through a conveyor belt 8, an outer wall of the transmission shaft 11 is sleeved with a cam 2 12, a plurality of transmission grooves are opened on one side of the box body 1, the rotating shaft 9 and the transmission shaft 11 are rotatably connected to the transmission grooves, and the fixed plate 3 is opened through the cooperation between the inside of the screening discharging device, thereby making the fixed plate 3 The electrode block 4 on one side touches the electrode sheet 5, so that the driving motor 7 is powered on and rotates. When the driving motor 7 rotates, it drives the rotating shaft 9, cam 1 10, conveyor belt 8, transmission shaft 11 and cam 2 12 to rotate, thereby colliding with the bottom of the screening plate 18. At this time, we pour the fired material into the box body 1 through the feed port 31. Because the screening port 21 is smaller as the screening plate 18 goes down, the larger material is left on the top of the screening plate 18, and the smallest material falls into the pull plate 17. It should be noted that through such a setting, after we have determined the firing plan and method, we use this device to screen materials of appropriate size for combustion, avoiding the mixing of materials of different sizes and affecting the combustion efficiency. By rotating the driving motor 7, it collides with the bottom of the screening plate 18, avoiding the material blocking the screening port 21 when the material is discharged, so that the material cannot be discharged.

[0052] The functional principle of the present invention can be explained by the following operation mode:

[0053] First, a reasonable firing scheme and method are calculated through the firing model. After the calculation, we will screen the material. First, by pulling out the bolt 2, the fixed plate 3 rebounds according to the action of the installation spring 22. At this time, the electrode block 4 touches the electrode sheet 5, so that the drive motor 7 is powered on and rotates. While the drive motor 7 rotates, it drives the rotating shaft 9 to rotate, and then drives the conveyor belt 8, the transmission shaft 11, the cam 1 10 and the cam 2 12 to rotate, and collide with the bottom of the screening plate 18. The screening plate 18 rebounds up and down according to the action of the first spring rod 25. After opening the fixed plate 3 to energize the drive motor 7, we pour the prepared material from the feed port 31 into the box body 1 for screening. Because the screening port 21 on the screening plate 18 is set to be smaller as it goes down, the large material is left on the screening plate 18, and the smallest material falls into the pulling plate 17.

[0054] After selecting the material of suitable size, we close the fixed plate 3. Because the electrode block 4 and the electrode sheet 5 are separated, the driving motor 7 stops rotating. We pull the pull rod 20 through the action of the slide plate 19 and the pull rod 20. The slide plate 19 slides according to the action of the slide rail 26, so that the selected material falls into the charging box 15 from the discharge port 1 23 and the discharge port 2 24. When the charging box 15 is full, the pressing plate 13 descends according to the action of the telescopic spring 14. When descending, it drives the pull rope for traction, so that the top plate 30 and the sliding rod 29 are stretched according to the action of the second spring rod 28, so that the top plate 30 blocks the discharge port 2 24 to prevent the material from continuing to fall. At this time, we fix the telescopic spring 14 with screws, and then we take the material out of the charging box 15 through the material taking port.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for blending coal and burning coal, It is characterized in that The steps include: The calculation scheme is carried out through a coal blending model, the model being based on an automatic power generation information collection system; Use Data-link and Process book software to deeply develop and utilize the massive unit data in the PI database to calculate the coal price and power supply coal consumption results; The optimal burning scheme is selected by inputting coal type parameters according to the actual situation through the burning model; The burning method is determined according to the burning model, and each burning scheme contains only two types of coal; When the unit load changes, the proportion of economic coal types to be burned can be changed by back grinding to maximize the burning efficiency; After the sintering ratio is determined, the material is discharged through the screening discharge device; The screening and discharging device comprises a box body (1), a bolt (2) is fixedly connected to the top of the box body (1), a feed port (31) is opened at the top of the box body (1), a mounting spring (22) is fixedly connected to the side of the box body (1) away from the bolt (2), two fixed blocks are fixedly connected to the side of the box body (1) located at the feed port (31), a rolling shaft (32) is fixedly connected between the two fixed blocks, a fixed plate (3) is rotatably connected to the rolling shaft (32), an electrode block (4) is fixedly connected to one side of the fixed plate (3), and a collision mechanism is connected to one side of the box body (1); A plurality of connecting cavities are provided on both sides of the box body (1), a first spring rod (25) is fixedly connected in the connecting cavities, a screening plate (18) is sleeved between the two first spring rods (25), a plurality of screening ports (21) are provided on the screening plate (18), a first discharge port (23) is provided on the screening plate (18), slide rails (26) are fixedly connected on both sides of the top of the screening plate (18), a slide plate (19) is slidably connected to the slide rail (26), a pull rod (20) is fixedly connected to one side of the slide plate (19), a tension spring (16) is fixedly connected to the inner side wall of the box body (1), a pull plate (17) is fixedly connected to one side of the tension spring (16), and a second discharge port (24) is provided on the pull plate (17); The bottom of the pull plate (17) is inlaid with a limiting groove (27), a second spring rod (28) is fixedly connected to the limiting groove (27), the outer wall of the second spring rod (28) is sleeved with a sliding rod (29), one side of the sliding rod (29) is fixedly connected to a top plate (30), the bottom of the inner wall of the box body (1) is fixedly connected to a plurality of telescopic springs (14), the top of the telescopic spring (14) is fixedly connected to a pressure plate (13), a charging box (15) is placed on the top of the pressure plate (13), and a material taking port is opened on one side of the box body (1) located at the charging box (15); The collision mechanism comprises a protection box (6), a driving motor (7) is fixedly connected to the interior of the protection box (6), an electrode sheet (5) is fixedly connected to one side of the driving motor (7), an output end of the driving motor (7) is rotatably connected to a rotating shaft (9), an outer wall of the rotating shaft (9) is sleeved with a cam 1 (10), the rotating shaft (9) is connected to a transmission shaft (11) through a conveyor belt (8), and an outer wall of the transmission shaft (11) is sleeved with a cam 2 (12); A sliding groove is provided on one side of the box body (1), the pull plate (17) is slidably connected to the sliding groove, the screening opening (21) of the screening plate (18) becomes smaller as the screening plate (18) moves downward, a connecting groove is provided on one side of the box body (1) located at the screening plate (18), the pull rod (20) is slidably connected to the connecting groove, one end of the mounting spring (22) is connected to the top of the box body (1), and the other end of the mounting spring (22) is connected to one side of the fixing plate (3); The box body (1) and the fixing plate (3) are both provided with bolt grooves, and the bolts (2) fix the fixing plate (3) to the top of the box body (1) through the bolt grooves. A plurality of transmission grooves are provided on one side of the box body (1), and the rotating shaft (9) and the transmission shaft (11) are rotatably connected to the transmission grooves. A pull rope is fixedly connected to one side of the pressure plate (13) close to the material taking port, and the other end of the pull rope is connected to one side of the top plate (30). The box body (1) is fixedly connected to a screw at the bottom of one side of the protective box (6).

2. A coal blending and combustion method according to claim 1, It is characterized in that The combustion model can realize "one-click calculation" according to the coal storage situation, and input the coal type parameters according to the actual situation. The model calculates the coal consumption of power supply in the three load sections, the unit price of standard coal entering the furnace, and the unit power supply cost in turn.

3. A coal blending and combustion method according to claim 1, It is characterized in that The co-firing method has the following characteristics: each co-firing scheme contains only two coal types; each coal type is loaded into a single bin and co-fired in the furnace, and the amount of coal in the running coal mill is the same.

4. A coal blending and combustion method according to claim 1, It is characterized in that Before the reverse grinding, the coal quality of the standby coal mill bin should be understood. After the routine inspection of the standby mill's oil, cooling water, etc. is completed, the mill can be started and then reverse grinding can be carried out.

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