Conveying device for coal and sludge in power plant

Abstract

The utility model discloses a conveying device for coal and sludge in a power plant. The uniformizing assembly comprises a first belt, a first belt weigher, a first coal breaking detection switch, a second belt, a first sludge feeder and a first sludge feeding port, the first belt weigher is arranged in the middle of the lower surface of the first belt, the first coal breaking detection switch is arranged on the upper surface of one end of the first belt, and the second belt is arranged on one side of the lower surface of the first belt; the first sludge feeder is arranged above one end of the second belt, the first sludge feeding port is formed in the lower surface of the first sludge feeder, the lower surface of the second belt weigher is arranged in the middle of the lower surface of the third belt, and the second coal interruption detection switch is arranged on the upper surface of one end of the third belt. The utility model has the advantages that the uniform mixing of sludge and coal is realized, and the problem that the operation of a unit is influenced by the blockage of a coal dropping pipe and the coal interruption of a coal feeder caused by the non-uniform blending of sludge in the prior art is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal transmission, in particular to a transmission device for coal and sludge in a power plant. Background Technique

[0002] With the rapid development of urbanization in China and the continuous increase of urban population, the amount of urban sewage treatment is also increasing continuously, and the amount of sludge, the waste after sewage treatment, is also increasing. At present, the main safety treatment plan for sludge is to mix sludge and coal through the fuel coal conveying system and boiler coal pulverizing system of coal-fired power plants, grind them, and then enter the furnace for combustion to achieve the harmless treatment of sludge.

[0003] During the existing coal feeding operation, the instability of the coal flow on the coal conveying belt or intermittent coal interruption is inevitable. When the coal quantity on the coal conveying belt is suddenly very small or there is intermittent coal interruption, the fuel personnel in the power plant cannot notify the sludge feeding personnel in advance to stop adding sludge. As a result, when the coal conveying belt in the power plant runs out of coal, the sludge feeding and conveying device is still adding sludge to the coal conveying belt that has run out of coal. During this process, there is no mixing of coal and sludge, resulting in too high local sludge content. After being affected by moisture, the sludge cakes and blocks the coal dropping pipe, causing the coal feeder of the operating boiler to run out of coal, seriously affecting the safe and stable operation of the boiler and the generating set. Content of the Utility Model

[0004] The utility model aims at the above problems and provides a transmission device for coal and sludge in a power plant that is convenient, reliable and can ensure safe and stable operation.

[0005] The technical solution of the utility model is as follows: a transmission device for coal and sludge in a power plant, comprising:

[0006] A uniform component; the uniform component includes a first belt, a first belt scale, a first coal interruption detection switch, a second belt, a first sludge feeder and a first sludge feeding port arranged. The first belt scale is arranged in the middle of the lower surface of the first belt, the first coal interruption detection switch is arranged on the upper surface of one end of the first belt, the second belt is arranged on one side of the lower surface of the first belt, the first sludge feeder is arranged above one end of the second belt, and the first sludge feeding port is arranged on the lower surface of the first sludge feeder.

[0007] The uniform component further includes a third belt, a second belt scale, a second coal interruption detection switch, a fourth belt, a second sludge feeder and a second sludge feeding port. The lower surface of the second belt scale is arranged in the middle of the lower surface of the third belt, the second coal interruption detection switch is arranged on the upper surface of one end of the third belt, the fourth belt is arranged below one end of the third belt, the second sludge feeder is arranged above one end of the fourth belt, and the second sludge feeding port is fixedly connected to the lower surface of the second sludge feeder.

[0008] The first sludge feeding port faces the second belt, and the second sludge feeding port faces the fourth belt.

[0009] The uniform component consists of two lines, and the coal is transported in the direction of the arrow.

[0010] It further includes a dispersion component, which includes a support frame, a motor, a platform, a lead screw, a lead screw nut, a dial plate and a limit rod. The support frame is arranged outside the second belt, the motor is arranged on one side of the outer surface of the support frame, the platform is arranged on the lower surface of the motor, the lead screw is fixedly connected to the output end of the motor, the lead screw nut is threadedly penetrated on the outer surface of the lead screw, the dial plate is arranged on the outer surface of the lead screw nut, and the limit rod penetrates through both sides of the outer surface of the dial plate.

[0011] Both ends of the limit rod are arranged in the middle of the support frame, and the lower surface of the dial plate is in contact with the upper surface of the second belt.

[0012] In the operation of the present utility model, through the arranged uniform component, during the sludge feeding process, the first coal break detection switch and the second coal break detection switch monitor the coal flow conditions of the first belt and the third belt in real time. When it is detected that the first belt is out of coal, the sludge feeding system is immediately automatically stopped from adding sludge to the corresponding second belt; when it is detected that the third belt is out of coal, the sludge feeding system is immediately automatically stopped from adding sludge to the corresponding fourth belt. When the coal break signal of the first belt disappears and the coal flow is normal, the sludge feeding system is automatically restored to add sludge to the second belt after a 30-second delay; when the coal break signal of the third belt disappears and the coal flow is normal, the sludge feeding system is automatically restored to add sludge to the fourth belt after a 30-second delay. The 30-second delay is added during the restoration because it takes 25 seconds for the coal to be transported from the coal break detection switch to the second belt and the fourth belt for adding sludge. The 30-second delay can ensure that there is coal on the corresponding second belt and fourth belt when the sludge addition is restored. The sludge addition amount is based on the coal amount. On the premise of ensuring safe combustion, the maximum sludge amount that can be co-fired per unit coal amount is certain. The sludge addition amount and the coal amount of the corresponding coal conveying belt maintain a certain ratio, which can achieve the best effect. During the fuel coal conveying process, there are two paths, namely path A and path B. The two paths can be added with sludge separately or simultaneously; when adding sludge through path A, the coal first passes through the first belt, then through the corresponding second belt, and sludge is added when passing through the second belt. During the subsequent transfer and conveying process of the belt, the uniform mixing of sludge and coal is realized; when adding sludge through path B, the coal first passes through the third belt, then through the corresponding fourth belt, and sludge is added when passing through the fourth belt. During the subsequent transfer and conveying process of the belt, the uniform mixing of sludge and coal is realized. The problems such as the blockage of the coal dropping pipe and the coal break of the coal feeder caused by uneven sludge blending, which originally affected the operation of the unit, have been effectively solved. Description of the Drawings

[0013] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 Schematic diagram of the uniform component of the present utility model;

[0015] Figure 2 Schematic diagram of the uniform component of the present utility model;

[0016] Figure 3 Structural diagram of the dispersion component of the present utility model;

[0017] In the drawings; the list of components represented by each label is as follows:

[0018] 11. First belt; 12. First belt scale; 13. First coal breakage detection switch; 14. Second belt; 15. First sludge feeder; 16. First sludge feeding port;

[0019] 21. Third belt; 22. Second belt scale; 23. Second coal breakage detection switch; 24. Fourth belt; 25. Second sludge feeder; 26. Second sludge feeding port;

[0020] 31. Support frame; 32. Motor; 33. Support table; 34. Lead screw; 35. Lead screw nut; 36. Pusher plate; 37. Limit rod. Detailed implementation manners

[0021] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model with reference to the drawings.

[0022] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementation manners disclosed below.

[0023] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of description, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples, which should not limit the protection scope of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0024] To make the objectives, technical solutions and advantages of the present utility model more clear, the following will further describe in detail the embodiments of the present utility model in conjunction with the accompanying drawings.

[0025] Please refer to Figures 1 to 3 As shown, this embodiment is a transmission device for coal and sludge in a power plant, including:

[0026] A uniform component; the uniform component includes a first belt 11, a first belt scale 12, a first coal breakage detection switch 13, a second belt 14, a first sludge feeder 15 and a first sludge feeding port 16 which are arranged. The first belt scale 12 is arranged in the middle of the lower surface of the first belt 11. The first coal breakage detection switch 13 is arranged on the upper surface of one end of the first belt 11. The second belt 14 is arranged on one side of the lower surface of the first belt 11. The first sludge feeder 15 is arranged above one end of the second belt 14. The first sludge feeding port 16 is arranged on the lower surface of the first sludge feeder 15;

[0027] The first belt 11 is used to convey coal and is the starting point of the entire coal conveying system. The first belt scale 12 is used to measure the weight of the coal passing through the first belt 11 to facilitate accurate control of the coal flow rate and total amount. The first coal breakage detection switch 13 is used to monitor the coal flow situation in real time.

[0028] Furthermore, the uniform component further includes a third belt 21, a second belt scale 22, a second coal breakage detection switch 23, a fourth belt 24, a second sludge feeder 25 and a second sludge feeding port 26. The lower surface of the second belt scale 22 is arranged in the middle of the lower surface of the third belt 21. The second coal breakage detection switch 23 is arranged on the upper surface of one end of the third belt 21. The fourth belt 24 is arranged below one end of the third belt 21. The second sludge feeder 25 is arranged above one end of the fourth belt 24. The second sludge feeding port 26 is fixedly connected to the lower surface of the second sludge feeder 25. The first sludge feeding port 16 is opposite to the second belt 14. The second sludge feeding port 26 is opposite to the fourth belt 24;

[0029] The uniform component has two lines, and the coal is transported along the arrow direction; the first sludge feeder 15 is used to evenly add sludge into the coal flow.

[0030] During the sludge feeding process, the first coal interruption detection switch 13 and the second coal interruption detection switch 23 continuously monitor the coal flow on the first belt 11 and the third belt 21. When it is detected that the first belt 11 is out of coal, the sludge feeding system (such as the DCS system) is immediately automatically stopped from feeding sludge to the corresponding second belt 14. When it is detected that the third belt 21 is out of coal, the sludge feeding system is immediately automatically stopped from feeding sludge to the corresponding fourth belt 24. When the coal interruption signal on the first belt 11 disappears and the coal flow is normal, the sludge feeding system automatically resumes feeding sludge to the second belt 14 after a 30-second delay. When the coal interruption signal on the third belt 21 disappears and the coal flow is normal, the sludge feeding system automatically resumes feeding sludge to the fourth belt 24 after a 30-second delay. The 30-second delay during recovery is because it takes 25 seconds for the coal to be transported from the coal interruption detection switch to the second belt 14 and the fourth belt 24 where sludge is fed. The 30-second delay can ensure that there is coal on the corresponding second belt 14 and fourth belt 24 when sludge feeding resumes. The sludge feeding volume is based on the coal volume. On the premise of ensuring safe combustion, the maximum sludge volume that can be co-fired per unit coal volume is certain. The sludge feeding volume maintains a certain ratio with the coal volume on the corresponding coal conveying belt to achieve the best effect. During the fuel coal conveying process, there are two paths, path A and path B. The two paths can be fed separately or simultaneously. When feeding through path A, the coal first passes through the first belt 11 and then through the corresponding second belt 14, and sludge is added when passing through the second belt 14. During the subsequent transfer and conveying process of the subsequent belts, uniform mixing of sludge and coal is achieved. When feeding through path B, the coal first passes through the third belt 21 and then through the corresponding fourth belt 24, and sludge is added when passing through the fourth belt 24. During the subsequent transfer and conveying process of the subsequent belts;

[0031] In this way, uniform mixing of sludge and coal is achieved, and the problems of coal chute blockage and coal feeder coal interruption caused by uneven sludge blending, which previously affected the operation of the unit, are effectively solved.

[0032] It also includes: a dispersion component. The dispersion component includes a support frame 31, a motor 32, a support table 33, a lead screw 34, a lead screw nut 35, a baffle 36, and a limit rod 37. The support frame 31 is arranged outside the second belt 14. The motor 32 is arranged on one side of the outer surface of the support frame 31. The support table 33 is arranged on the lower surface of the motor 32. The lead screw 34 is fixedly connected to the output end of the motor 32. The lead screw nut 35 is threadedly penetrated on the outer surface of the lead screw 34. The baffle 36 is arranged on the outer surface of the lead screw nut 35. The limit rod 37 penetrates through both sides of the outer surface of the baffle 36. Both ends of the limit rod 37 are arranged in the middle of the support frame 31, and the lower surface of the baffle 36 is in contact with the upper surface of the second belt 14;

[0033] The motor 32 is the power source of the dispersing component. By driving the screw rod 34 to rotate, the dial 36 is driven to perform a horizontal reciprocating motion. The screw rod 34 converts the rotational motion of the motor 32 into the horizontal reciprocating motion of the dial 36. The screw nut 35 is used in cooperation with the screw rod 34, and through the threaded connection, the rotational motion of the screw rod 34 is converted into the horizontal motion of the dial 36.

[0034] During operation, when adding sludge at the first sludge feeding port 16 and the second sludge feeding port 26, the sludge accumulates in the middle of the upper surfaces of the second belt 14 and the fourth belt 24. At this time, the staff can directly control the motor 32 to start through the external controller. The motor 32 drives the screw rod 34 to rotate, and the rotation of the screw rod 34 will drive the screw nut 35 to perform a horizontal reciprocating motion. The horizontal motion of the screw nut 35 synchronously drives the horizontal motion of the dial 36.

[0035] In this way, the accumulated sludge can be dispersed to both sides of the belt, which is convenient for the uniform mixing of coal and sludge, improves the combustion efficiency, and improves the uniformity of the mixing of sludge and coal and the operation efficiency of the system.

[0036] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transmission device for coal and sludge in a power plant, characterized in that, Comprising: A uniformity component; the uniformity component includes a first belt (11), a first belt scale (12), a first coal break detection switch (13), a second belt (14), a first sludge feeder (15) and a first sludge feeding port (16) provided. The first belt scale (12) is arranged in the middle of the lower surface of the first belt (11), the first coal break detection switch (13) is arranged on the upper surface of one end of the first belt (11), the second belt (14) is arranged on one side of the lower surface of the first belt (11), the first sludge feeder (15) is arranged above one end of the second belt (14), and the first sludge feeding port (16) is arranged on the lower surface of the first sludge feeder (15).

2. The transfer device for coal and sludge in a power plant according to claim 1, wherein The uniformity component further includes a third belt (21), a second belt scale (22), a second coal break detection switch (23), a fourth belt (24), a second sludge feeder (25) and a second sludge feeding port (26). The lower surface of the second belt scale (22) is arranged in the middle of the lower surface of the third belt (21), the second coal break detection switch (23) is arranged on the upper surface of one end of the third belt (21), the fourth belt (24) is arranged below one end of the third belt (21), the second sludge feeder (25) is arranged above one end of the fourth belt (24), and the second sludge feeding port (26) is fixedly connected to the lower surface of the second sludge feeder (25).

3. A transmission device for coal and sludge in a power plant according to claim 2, characterized in that, The first sludge feeding port (16) faces the second belt (14), and the second sludge feeding port (26) faces the fourth belt (24).

4. A transmission device for coal and sludge in a power plant according to claim 2, characterized in that, It further includes a dispersion component. The dispersion component includes a support frame (31), a motor (32), a support table (33), a lead screw (34), a lead screw nut (35), a baffle (36) and a limit rod (37). The support frame (31) is arranged outside the second belt (14), the motor (32) is arranged on one side of the outer surface of the support frame (31), the support table (33) is arranged on the lower surface of the motor (32), the lead screw (34) is fixedly connected to the output end of the motor (32), the lead screw nut (35) is threadedly penetrated on the outer surface of the lead screw (34), the baffle (36) is arranged on the outer surface of the lead screw nut (35), and the limit rod (37) penetrates through both sides of the outer surface of the baffle (36).

5. A transmission device for coal and sludge in a power plant according to claim 4, characterized in that, Both ends of the limit rod (37) are arranged in the middle of the support frame (31), and the lower surface of the baffle (36) is in contact with the upper surface of the second belt (14).

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