Pulverized coal boiler with well-optimized coal quality

Abstract

The utility model discloses a pulverized coal fired boiler with well optimized coal quality, which comprises a pulverized coal fired boiler body, the pulverized coal fired boiler body is used for pulverized coal combustion, the upper end of the pulverized coal fired boiler body is fixedly provided with a supporting seat through a bolt, one side of the supporting seat is provided with a flow guide pipe, the flow guide pipe is connected with the pulverized coal fired boiler body, and the pulverized coal fired boiler further comprises a pre-filtering box. The pre-filtering box is arranged on one side of the upper end of the supporting seat, four sliding columns which are annularly distributed at equal intervals are welded to the upper end of the interior of the pre-filtering box, sliding plates are arranged outside the sliding columns, a filtering net is arranged between the sliding plates, and the sliding plates are connected with the covered edge of the filtering net. According to the pulverized coal boiler with the optimized coal quality, through three times of impurity removal, the influence of impurities and moisture on the pulverized coal boiler body is avoided, the coal quality is optimized, and stable, normal and continuous operation can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverized coal boilers, and particularly relates to a pulverized coal boiler with good coal quality optimization. Background Technique

[0002] A boiler is an energy conversion device. The energy input into the boiler includes the chemical energy in the fuel and electric energy. The boiler outputs steam, high-temperature water or organic heat carriers with a certain amount of heat energy. A boiler with "pulverized coal combustion technology" as the core is a pulverized coal boiler. The pulverized coal in the pulverized coal boiler burns sufficiently, saving 30%-50% of coal compared with traditional coal-fired boilers.

[0003] However, impurities may be mixed during the pulverized coal grinding process or moisture may be contained due to moisture absorption during transportation. The pulverized coal boiler has very strict requirements for coal quality. The presence of foreign matters or moisture in the pulverized coal has a great impact on the stable operation of the boiler, resulting in insufficient combustion of the pulverized coal, slow combustion speed, and reduced thermal efficiency of the pulverized coal boiler. Therefore, it does not meet the existing requirements. For this reason, we propose a pulverized coal boiler with good coal quality optimization. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pulverized coal boiler with good coal quality optimization, so as to solve the problem that the poor optimization of the pulverized coal fed into the pulverized coal boiler in the above background technique affects the normal operation and reduces the thermal efficiency.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pulverized coal boiler with good coal quality optimization, including a pulverized coal boiler body, and the pulverized coal boiler body is used for pulverized coal combustion. A support seat is fixedly installed at the upper end of the pulverized coal boiler body through bolts. A diversion pipe is arranged on one side of the support seat, and the diversion pipe is connected to the pulverized coal boiler body;

[0006] It also includes a pre-filter box, which is arranged on one side of the upper end of the support seat. Four sliding columns are welded at the upper end inside the pre-filter box and are evenly distributed in a ring. Sliding plates are arranged on the outer sides of the sliding columns. A filter screen is arranged between the sliding plates, and the sliding plates are all connected to the edge of the filter screen;

[0007] It also includes a centrifugal impurity removal box, which is arranged on one side of the pre-filter box. A centrifugal cylinder is arranged inside the centrifugal impurity removal box. A rotating shaft is fixedly arranged at the middle position of the lower end of the centrifugal cylinder. One end of the rotating shaft extends to the outside of the centrifugal impurity removal box, and the rotating shaft is rotationally connected to the centrifugal impurity removal box;

[0008] It also includes a heating box, which is arranged on one side of the centrifugal impurity removal box. Two heating tubes are arranged inside the heating box. A spiral conveyor tube is coiled around the outer walls of the heating tubes, and both ends of the spiral conveyor tube extend to the outside of the heating box. One end of the spiral conveyor tube located outside the heating box is connected to the diversion pipe.

[0009] Preferably, a return spring is sleeved outside each of the sliding columns. One end of each return spring is connected to the pre-filter box, and the other end of each return spring is in contact with the sliding plate.

[0010] Preferably, a first conveyor fan is provided between the pre-filter box and the centrifugal impurity removal box. The first conveyor fan is connected to the pre-filter box and the centrifugal impurity removal box through first conveyor pipes respectively, and one of the first conveyor pipes extends into the interior of the centrifugal cylinder.

[0011] Preferably, the end of the first conveyor pipe located inside the centrifugal cylinder is connected to the centrifugal cylinder through a bearing. The outer wall of the bearing is fixedly connected to the upper opening of the centrifugal cylinder, and the inner wall of the bearing is fixedly connected to the end of the first conveyor pipe located inside the centrifugal cylinder.

[0012] Preferably, a second conveyor fan is provided between the centrifugal impurity removal box and the heating box. The second conveyor fan is connected to the centrifugal impurity removal box and the end of the spiral conveyor pipe located outside the heating box through second conveyor pipes respectively.

[0013] Preferably, a limit cover is connected to the upper part of the pre-filter box by means of threads.

[0014] Preferably, a servo motor is provided below the centrifugal impurity removal box, and the output end of the servo motor is in transmission connection with the end of the rotating shaft located outside the centrifugal impurity removal box through a coupling.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. In the present utility model, a filter screen is provided at the upper end inside the pre-filter box. When pulverized coal is added, larger impurities contained therein will be filtered by the filter screen, thereby performing the first impurity removal, effectively reducing the impurity content of the pulverized coal. At the same time, when the pulverized coal is finished, under the elastic recovery action of the return spring, the sliding plate can be driven to make the filter screen slide up and down, thus forming a shaking effect to prevent the filter screen from being blocked by impurities. By screwing out the limit cover through threads, the sliding plate can be taken out from the sliding column, thereby facilitating the cleaning of the filter screen and achieving a long-term filtering and impurity removal effect.

[0017] 2. In the present utility model, a centrifugal impurity removal box is provided on one side of the pre-filter box. The pulverized coal is conveyed into the centrifugal cylinder by the first conveyor fan. Starting the servo motor can drive the centrifugal cylinder to rotate, and the centrifugal force generated by the rotation can throw the pulverized coal out of the centrifugal cylinder, while larger impurities will be blocked, thereby performing the second impurity removal, further improving the impurity removal effect and optimizing the coal quality of the pulverized coal boiler body 1.

[0018] 3. The utility model is provided with a heating box on one side of the centrifugal impurity removal box. The pulverized coal can be conveyed into the spiral conveying pipe by the second conveying fan. When the heating pipe is started to generate heat, the pulverized coal in the spiral conveying pipe will be dried by the heat generated by the heating pipe when passing through the spiral conveying pipe, so as to remove moisture, form the third impurity removal, prevent the influence of moisture on the combustion of pulverized coal, and further make the combustion of pulverized coal more sufficient, thereby improving the combustion efficiency. Brief Description of the Drawings

[0019] Figure 1 is the front view of the internal structure of the utility model;

[0020] Figure 2 is the top view of the internal structure of the pre-filter box of the utility model;

[0021] Figure 3 is the three-dimensional schematic diagram of the limit cover of the utility model;

[0022] Figure 4 of the utility model Figure 1 is the partial enlarged view of area A in;

[0023] Figure 5 of the utility model Figure 1 is the partial enlarged view of area B in.

[0024] In the figure: 1, pulverized coal boiler body; 2, support seat; 3, pre-filter box; 4, sliding column; 5, return spring; 6, sliding plate; 7, filter net; 8, first conveying fan; 9, first conveying pipe; 10, centrifugal impurity removal box; 11, centrifugal cylinder; 12, bearing; 13, rotating shaft; 14, servo motor; 15, second conveying fan; 16, second conveying pipe; 17, heating box; 18, heating pipe; 19, spiral conveying pipe; 20, diversion pipe; 21, limit cover. Detailed Description of the Preferred Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figure 1-5 , the present utility model provides a technical solution: a pulverized coal boiler with good coal quality optimization, including a pulverized coal boiler body 1, and the pulverized coal boiler body 1 is used for pulverized coal combustion. The upper end of the pulverized coal boiler body 1 is fixedly installed with a support seat 2 through bolts. A diversion pipe 20 is arranged on one side of the support seat 2, and the diversion pipe 20 is connected to the pulverized coal boiler body 1;

[0027] It also includes a pre-filter box 3, which is arranged on one side of the upper end of the support base 2. Four sliding columns 4 evenly distributed in a ring are welded at the upper end inside the pre-filter box 3. Sliding plates 6 are arranged on the outer parts of the sliding columns 4. A filter screen 7 is arranged between the sliding plates 6, and the sliding plates 6 are all connected to the edge of the filter screen 7;

[0028] It also includes a centrifugal impurity removal box 10, which is arranged on one side of the pre-filter box 3. A centrifugal cylinder 11 is arranged inside the centrifugal impurity removal box 10. A rotating shaft 13 is fixedly arranged at the middle position of the lower end of the centrifugal cylinder 11. One end of the rotating shaft 13 extends to the outside of the centrifugal impurity removal box 10, and the rotating shaft 13 is rotationally connected to the centrifugal impurity removal box 10;

[0029] It also includes a heating box 17, which is arranged on one side of the centrifugal impurity removal box 10. Two heating tubes 18 are arranged inside the heating box 17. Spiral conveying pipes 19 are coiled around the outer walls of the heating tubes 18, and both ends of the spiral conveying pipes 19 extend to the outside of the heating box 17. One end of the spiral conveying pipe 19 located outside the heating box 17 is connected to a diversion pipe 20. The pulverized coal boiler with optimized coal quality can remove impurities from the pulverized coal for the first time through the filter screen 7. By starting the servo motor 14, the rotating shaft 13 drives the centrifugal cylinder 11 to rotate. The centrifugal force generated by the rotation of the centrifugal cylinder 11 can throw the pulverized coal out of the centrifugal cylinder 11, leaving larger impurities in the centrifugal cylinder 11, thereby realizing the second impurity removal. By starting the heating tubes 18, heat can be generated. When the pulverized coal passes through the spiral conveying pipes 19, it will be dried by the generated heat, thereby removing moisture and forming the third impurity removal, preventing the influence of moisture on the combustion of the pulverized coal, so that the coal quality of the pulverized coal boiler body 1 is optimized.

[0030] Please refer to Figure 2 and Figure 4 , reset springs 5 are sleeved on the outer parts of the sliding columns 4. One end of each reset spring 5 is connected to the pre-filter box 3, and the other end of each reset spring 5 is in contact with the sliding plate 6. Under the elastic restoration of the reset springs 5, the sliding plates 6 will slide upward, driving the filter screen 7 to slide synchronously, so that the filter screen 7 forms a shaking effect, preventing impurities from blocking the filter screen 7;

[0031] Please refer to Figure 1 , a first conveyor fan 8 is arranged between the pre-filter box 3 and the centrifugal impurity removal box 10. The first conveyor fan 8 is connected to the pre-filter box 3 and the centrifugal impurity removal box 10 through first conveyor pipes 9 respectively, and one of the first conveyor pipes 9 extends into the centrifugal cylinder 11. Through the conveying of the first conveyor fan 8, the pulverized coal can be conveyed from the pre-filter box 3 into the centrifugal impurity removal box 10;

[0032] Please refer to Figure 5, one end of the first conveying pipe 9 located inside the centrifugal cylinder 11 is connected to the centrifugal cylinder 11 through a bearing 12. The outer wall of the bearing 12 is fixedly connected to the upper opening of the centrifugal cylinder 11, and the inner wall of the bearing 12 is fixedly connected to one end of the first conveying pipe 9 located inside the centrifugal cylinder 11. The setting of the bearing 12 enables the centrifugal cylinder 11 to rotate relative to the first conveying pipe 9;

[0033] Please refer to Figure 1 , a second conveying fan 15 is arranged between the centrifugal impurity removal box 10 and the heating box 17. The second conveying fan 15 is connected to both the centrifugal impurity removal box 10 and one end of the spiral conveying pipe 19 located outside the heating box 17 through a second conveying pipe 16. Through the conveying of the second conveying fan 15, pulverized coal can be conveyed from the centrifugal impurity removal box 10 into the spiral conveying pipe 19;

[0034] Please refer to Figure 3 and Figure 4 , a limit cover 21 is connected above the pre-filter box 3 by thread. The limit cover 21 can be taken out by thread connection, so as to release the limit on the sliding plate 6, enable the sliding plate 6 to drive the filter net 7 to be taken out from the sliding column, and thus facilitate the cleaning of the filter net 7;

[0035] Please refer to Figure 1 , a servo motor 14 is arranged below the centrifugal impurity removal box 10, and the output end of the servo motor 14 is in transmission connection with one end of the rotating shaft 13 located outside the centrifugal impurity removal box 10 through a coupling. The servo motor 14 can provide power for the rotation of the rotating shaft 13.

[0036] Working principle: When in use, connect the pulverized coal conveying pipe to the upper end of the pre-filter box 3. The pulverized coal will fall on the filter screen 7 under the action of gravity and be filtered by the filter screen 7, thereby filtering out larger impurities and performing the first impurity removal, which enhances the effect of coal quality optimization. The acting force generated by the conversion of the gravitational potential energy of the pulverized coal acts on the filter screen 7, causing the filter screen 7 to drive the slide plate 6 to slide on the sliding column 4 and compress the return spring 5. When the addition of pulverized coal stops, under the elastic recovery action of the return spring 5, the slide plate 6 will slide upward, driving the filter screen 7 to slide synchronously, so that the filter screen 7 forms a shaking effect to prevent impurities from blocking the filter screen 7. Unscrew the limit cover 21 through the thread to remove the slide plate 6 from the sliding column, thereby facilitating the cleaning of the filter screen 7 and achieving long-term filtering and impurity removal effects. Start the first conveying fan 8, and the pulverized coal can be conveyed into the centrifugal cylinder 11 through the conveying of the first conveying pipe 9. Start the servo motor 14, and under the drive of the coupling, the rotating shaft 13 can be driven to rotate. The rotation of the rotating shaft 13 will drive the centrifugal cylinder 11 to rotate synchronously. The centrifugal cylinder 11 and the first conveying pipe 9 are connected through the bearing 12. Therefore, the centrifugal force generated by the rotation of the centrifugal cylinder 11 can throw the pulverized coal out of the centrifugal cylinder 11, leaving larger impurities in the centrifugal cylinder 11, thereby realizing the second impurity removal and further improving the impurity removal effect. Start the second conveying fan 15, and under the conveying of the second conveying pipe 16, the pulverized coal can be conveyed into the spiral conveying pipe 19, and through the diversion pipe 20, the spiral conveying pipe 19 can convey the pulverized coal into the pulverized coal boiler body 1 for combustion. Start the heating pipe 18 to generate heat. When the pulverized coal passes through the spiral conveying pipe 19, it will be dried by the generated heat, thereby removing moisture and forming the third impurity removal, preventing the influence of moisture on the combustion of the pulverized coal and making the combustion of the pulverized coal more sufficient, improving the combustion efficiency. Through three times of impurity removal, the influence of impurities on the pulverized coal boiler body 1 is avoided, the coal quality is optimized, and it can operate stably, normally and continuously.

[0037] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A pulverized coal boiler with good coal quality optimization, including a pulverized coal boiler body (1), and the pulverized coal boiler body (1) is used for pulverized coal combustion. The upper end of the pulverized coal boiler body (1) is fixedly installed with a support seat (2) through bolts. One side of the support seat (2) is provided with a diversion pipe (20), and the diversion pipe (20) is connected to the pulverized coal boiler body (1). It is characterized in that: It further includes a pre-filter box (3), which is arranged on one side of the upper end of the support seat (2). Four sliding columns (4) distributed annularly and equidistantly are welded to the upper end inside the pre-filter box (3). Sliding plates (6) are arranged on the outer sides of the sliding columns (4). A filter screen (7) is arranged between the sliding plates (6), and the sliding plates (6) are all connected to the edge of the filter screen (7); It further includes a centrifugal impurity removal box (10), which is arranged on one side of the pre-filter box (3). A centrifugal cylinder (11) is arranged inside the centrifugal impurity removal box (10). A rotating shaft (13) is fixedly arranged at the middle position of the lower end of the centrifugal cylinder (11). One end of the rotating shaft (13) extends to the outside of the centrifugal impurity removal box (10), and the rotating shaft (13) is rotatably connected to the centrifugal impurity removal box (10); It further includes a heating box (17), which is arranged on one side of the centrifugal impurity removal box (10). Two heating pipes (18) are arranged inside the heating box (17). A spiral conveying pipe (19) is coiled around the outer walls of the heating pipes (18), and both ends of the spiral conveying pipe (19) extend to the outside of the heating box (17). One end of the spiral conveying pipe (19) located outside the heating box (17) is connected to the diversion pipe (20).

2. The pulverized coal boiler with optimized coal quality according to claim 1, characterized in that: Reset springs (5) are sleeved on the outer sides of the sliding columns (4). One ends of the reset springs (5) are all connected to the pre-filter box (3), and the other ends of the reset springs (5) are all in contact with the sliding plates (6).

3. A pulverized coal boiler with optimized coal quality according to claim 1, characterized in that: A first conveying fan (8) is arranged between the pre-filter box (3) and the centrifugal impurity removal box (10). The first conveying fan (8) is connected to the pre-filter box (3) and the centrifugal impurity removal box (10) through first conveying pipes (9), and one of the first conveying pipes (9) extends into the centrifugal cylinder (11).

4. A pulverized coal boiler with optimized coal quality according to claim 3, characterized in that: One end of the first conveying pipe (9) located inside the centrifugal cylinder (11) is connected to the centrifugal cylinder (11) through a bearing (12). The outer wall of the bearing (12) is fixedly connected to the upper end opening of the centrifugal cylinder (11), and the inner wall of the bearing (12) is fixedly connected to one end of the first conveying pipe (9) located inside the centrifugal cylinder (11).

5. A pulverized coal boiler with optimized coal quality according to claim 1, characterized in that: A second conveying fan (15) is arranged between the centrifugal impurity removal box (10) and the heating box (17). The second conveying fan (15) is connected to the centrifugal impurity removal box (10) and one end of the spiral conveying pipe (19) located outside the heating box (17) through second conveying pipes (16).

6. A pulverized coal boiler with optimized coal quality according to claim 1, characterized in that: A limit cover (21) is connected to the upper part of the pre-filter box (3) by threading.

7. A pulverized coal boiler with optimized coal quality according to claim 1, characterized in that: A servo motor (14) is provided below the centrifugal impurity removal box (10), and the output end of the servo motor (14) is in transmission connection with one end of the rotating shaft (13) outside the centrifugal impurity removal box (10) through a coupling.

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