Double-chamber intelligent coal blending system
By installing buffer bins and coal distribution channels at the bottom of the raw coal bin, combined with pulse pneumatic pneumatic purge and rotary blocking device, the problem of coal material blockage is solved, and the stable transportation of coal material and efficient coal supply is achieved.
Patent Information
- Application Number
- CN202422587701.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-25
AI Technical Summary
In the existing coal distribution technology, coal materials are prone to blockage during entering the coal feeder, and the coal supply efficiency is low.
The buffer bin is installed at the bottom of the original coal bin to form an intelligent coal distribution system with a double bin body. It provides temporary storage space through the buffer bin. The coal material is directly sent to the coal feeder by using the coal distribution channel and the buffer bin. Combined with the pulse pneumatic purge device and the rotary clearing device, it ensures the smooth delivery and controllability of the coal material.
It improves the controllability of the coal feed doping rate, reduces the risk of blockage, and improves the efficiency of coal supply.
Smart Images
Figure CN223228434U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of coal-fired power generation equipment, and specifically relates to a dual-chamber intelligent coal blending system. Background Art
[0002] In the field of coal-fired power generation, in order to achieve rapid switching of different types of coal and adapt to the requirements of power grid dispatching, the technology of coal distribution by compartment has been popularized in the coal-fired power generation industry. The existing technology of coal distribution by compartment mainly installs a distribution pipe on each raw coal bin, and all the distribution pipes are connected to a conveying channel. The bottom of the conveying channel is connected to multiple unloading pipes. After each unloading pipe is transferred to the corresponding raw coal bin, it is connected to the common channel of the raw coal bin and the coal feeder, or the unloading pipe is independently connected to a channel to form a dual channel of the unloading pipe and the raw coal bin and is connected to the coal feeder, thereby realizing the distribution of different types of coal in different raw coal bins to different coal feeders through the distribution pipe, conveying channel and unloading pipe.
[0003] Among them, the method of connecting the unloading pipe and the raw coal bin dual channels with the coal feeder requires lengthening the original coal feeder and opening an additional connection port. At the same time, the unloading pipe needs to be equipped with a transition bin body and a cleaning mechanism. The modification workload is huge and the system is complex. The method of merging the unloading pipe into the raw coal bin and sharing the raw coal bin channel to connect with the coal feeder is limited by space. The passage between the raw coal bin and the coal feeder is prone to coal blockage due to the narrow passage. In addition, the installation of a large cleaning mechanism at the connection will further reduce the effective space of the connecting passage, increase the probability of blockage, and reduce the coal supply efficiency. Summary of the Invention
[0004] In order to solve the problem that the blended coal in the existing compartment coal blending technology is easily blocked when entering the coal feeder and the coal supply efficiency is low, the present application provides a dual-chamber intelligent coal blending system.
[0005] In one solution, the dual-chamber intelligent coal blending system includes a raw coal bunker, a buffer bunker, a coal blending channel, and a coal feeder. The raw coal bunker, buffer bunker, and coal feeder are arranged in a one-to-one correspondence and are arranged in at least two groups.
[0006] The raw coal bunker consists of a storage section and a discharge section. The storage section is the main part of the raw coal bunker. A distribution pipe connected to the coal distribution channel is extended downward from the bunker wall of the storage section. The discharge section is the bottom end of the raw coal bunker and is connected to the top of the buffer bunker. A first switch is arranged on the distribution pipe, and a second switch is arranged on the discharge section.
[0007] The coal distribution channel has a reciprocating conveying mechanism inside, and the bottom of the coal distribution channel is constructed with several connecting sections corresponding to the buffer bin, and the two ends of the connecting sections are connected to the coal distribution channel and the buffer bin respectively;
[0008] The buffer bin includes a transition part and a discharge part. The transition part is in a conical shape that gradually converges from top to bottom. The top of the transition part is connected with the connecting section and the discharge part. The discharge part is connected with the coal feeder, and a first rotary blockage clearing device is arranged on the discharge part.
[0009] In one solution, a pulse pneumatic blowing device or an air vibrator is provided on the connecting section.
[0010] In one solution, a plurality of pulse pneumatic blowing devices are provided on a side wall of the transition portion adjacent to the connecting section.
[0011] In one embodiment, the conveying mechanism is provided with a weighing element and a control system;
[0012] When the coal falls from the distribution pipe onto the conveying mechanism, the weighing element feeds back the collected weight data to the control system, and the control system controls the conveying speed and amount of the coal according to the collected weight data.
[0013] In one solution, a second rotary blockage clearing device is further provided on the discharge portion, and the second rotary blockage clearing device is located on the upstream side of the second switch.
[0014] In one embodiment, the first switch and the second switch are both one-way gate valves or two-way gate valves.
[0015] In one solution, inspection openings are provided on the silo walls of both the unloading portion and the material discharging portion, and the inspection openings are hinged with silo doors.
[0016] In one embodiment, the conveying mechanism may be a belt conveyor or a scraper conveyor.
[0017] Beneficial effects of this application:
[0018] The present application installs a buffer bin at the bottom of the existing raw coal bin to form a dual-bin intelligent coal blending system. The coal is delivered to the buffer bin during coal blending in the coal blending channel, and the buffer bin directly delivers the blended coal to the coal feeder. The independent accommodating cavity of the buffer bin can provide a temporary storage space for the coal to be burned, thereby avoiding blockage of the unloading channel and the connecting section due to the small space and fluctuations in the rate of unloading to the coal feeder, improving the controllability of the coal blending rate, and increasing the coal supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0020] Figure 1This is a front view of a dual-chamber intelligent coal blending system in one embodiment of the present application;
[0021] Figure 2 This is a side view of a dual-chamber intelligent coal blending system in one embodiment of the present application;
[0022] Figure 3 This is a schematic diagram of a dual-chamber intelligent coal blending system in one embodiment of the present application;
[0023] Figure 4 yes Figure 3 A partial enlarged view of part A in the middle;
[0024] Reference numerals in the figures:
[0025] 1. Raw coal bunker; 11. Storage unit; 12. Unloading unit; 121. Second switch; 13. Distribution pipe; 131. First switch;
[0026] 2. Buffer bin; 21. Transition section; 22. Discharging section;
[0027] 3. Coal distribution channel; 31. Connecting section;
[0028] 4. Coal feeder;
[0029] 5. The first rotary blockage clearing device;
[0030] 6. Pulse pneumatic blowing device;
[0031] 7. Second rotary blockage clearing device;
[0032] 8. Warehouse door. DETAILED DESCRIPTION
[0033] The specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application and not all embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.
[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0036] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0037] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.
[0038] In order to solve the problem of easy blockage of blended coal materials entering the coal feeder and low coal supply efficiency in the existing compartment coal blending technology, the present application provides a dual-compartment intelligent coal blending system, and the specific embodiments are as follows:
[0039] In one embodiment, see Figure 1 and Figure 2 The dual-chamber intelligent coal distribution system includes a raw coal bin 1, a buffer bin 2, a coal distribution channel 3 and a coal feeder 4; the arrangement quantity of the raw coal bin 1, the buffer bin 2 and the coal feeder 4 corresponds one to one, and there are at least two groups.
[0040] In this embodiment, the raw coal bin 1 includes a storage portion 11 and a discharge portion 12. The storage portion 11 is in the shape of an open cylinder and is the main part of the raw coal bin 1, used for storing coal. A distribution pipe 13 connected to the coal distribution channel 3 is constructed on the wall of the upper and middle section of the storage portion 11 and extends downward. The coal can freely fall from the raw coal bin 1 to the coal distribution channel 3 through the distribution pipe 13. The discharge portion 12 is the bottom end portion of the raw coal bin 1 and serves as a channel for the coal in the raw coal bin 1 to be discharged downward. The discharge portion 12 is connected to the top of the buffer bin 2. A first switch 131 is arranged on the distribution pipe 13 for controlling the transportation of coal in the distribution pipe 13. Similarly, a second switch 121 is arranged on the discharge portion 12 for controlling the discharge of coal stored in the raw coal bin 1 into the buffer bin 2.
[0041] In this embodiment, the coal distribution channel 3 has a reciprocating conveying mechanism inside, which can accurately transport the coal delivered by each distribution pipe 13 to the corresponding outlet position in the coal distribution channel 3. The bottom of the coal distribution channel 3 is constructed with a number of connecting sections 31 corresponding to the buffer bin 2. The top of the connecting section 31 is connected to the outlet at the bottom of the coal distribution channel 3, and the bottom of the connecting section 31 is connected to the top end face of the buffer bin 2. The connecting section 31 is a direct connection between the coal distribution channel 3 and the buffer bin 2. Compared with the discharge pipe of the existing coal distribution system with separate bins, the connecting section 31 has a larger diameter and is shorter, so the coal is more efficient and less likely to be blocked.
[0042] In this embodiment, the buffer bin 2 includes a transition portion 21 and a discharge portion 22. The transition portion 21 is in the shape of a cone that gradually converges from top to bottom. The top end face of the transition portion 21 is connected to the connecting section 31 and the discharge portion 12; the discharge portion 22 is connected to the coal feeder 4, and a first rotary clearing device 5 is arranged on the discharge portion 22 to ensure that the buffer bin 2 can smoothly feed coal to the coal feeder 4.
[0043] Therefore, the present application installs a buffer bin 2 at the bottom of the existing raw coal bin 1 to form a dual-bin intelligent coal blending system. The coal is delivered to the buffer bin 2 during coal blending in the coal blending channel 3, and the buffer bin 2 directly delivers the blended coal to the coal feeder 4. Through the independent accommodating cavity of the buffer bin 2, when the unloading rate of the unloading part 22 is slow, the buffer bin 2 can provide a temporary storage space for the coal to be burned, avoiding blockage of the coal due to the narrow space; when the unloading part 22 needs to speed up the unloading rate, in conjunction with the first rotary clearing device 5, the coal can quickly enter the coal feeder 4 from the buffer bin 2, thereby realizing the controllability of the coal blending rate and the stability of operation, and improving the efficiency of coal supply.
[0044] In one embodiment, see Figures 2 to 4The connecting section 31 is equipped with a pulse pneumatic blowing device 6 or an air vibrator, which can clear and clean the connecting section 31, ensuring that the coal can smoothly enter the buffer bin 2 from the coal distribution channel 3. Furthermore, the pulse pneumatic blowing device 6 and the air vibrator are more compact and lightweight than conventional rotary blockage clearing devices, occupying less space and can be conveniently placed at the required location in the coal bin, reducing material and processing costs.
[0045] Specifically, the pulse pneumatic blowing device 6 is a device that uses compressed air to pass through a pulse module to form a powerful circular radial burst of airflow on the inner wall of the silo, and the impact force generated by the airflow causes the material in the silo to be separated from the inner wall of the silo, effectively reducing the friction resistance between the material and the material, and between the material and the inner wall of the silo, and accelerating the fluidity of the material. It is an efficient blowing and clearing device.
[0046] In one embodiment, see Figures 2 to 4 A plurality of pulse pneumatic blowing devices 6 are provided on the side wall of the transition part 21 adjacent to the connecting section 31. When the coal enters the buffer bin 2 from the connecting section 31, the coal will slide down along the side wall of the transition part 21 adjacent to the connecting section 31. At this time, the blowing effect of the pulse pneumatic blowing device 6 can make the coal adhere to the flow of gas and accumulate in a dispersed manner along the inner wall of the bin in the transition part 21, thereby preventing the coal from sliding into the transition part 21 under the action of its own gravity to form a unilateral accumulation, greatly reducing the space utilization rate in the bin of the transition part 21. At the same time, the pulse pneumatic blowing device 6 can also dredge and clean the interior of the bin body of the transition part 21, thereby reducing the difficulty of equipment maintenance and increasing the service life of the equipment.
[0047] In one embodiment, the conveying mechanism is provided with a weighing element and a control system. When the coal falls from the distribution pipe 13 onto the conveying mechanism, the weighing element feeds back the collected weight data to the control system, which controls the conveying speed and delivery volume of the coal based on the collected weight data.
[0048] In one embodiment, see Figure 2 The unloading section 12 is also provided with a second rotary blockage clearing device 7, and the second rotary blockage clearing device 7 is located upstream of the second switch 121. Since the unloading section 12 is adjacent to the storage section 11, if the coal in the corresponding raw coal bunker 1 has not been used for combustion for a long time, the coal stored upstream of the second switch 121 is susceptible to adhesion and increased molecular stress due to the influence of humidity and pressure. When the second switch 121 is opened again to call the corresponding coal, a blockage will occur. Therefore, the second rotary blockage clearing device 7 can be provided to clear the blockage immediately, ensuring smooth feeding of the unloading section 12.
[0049] In one embodiment, both the first switch 131 and the second switch 121 are one-way or two-way gate valves. Gate valves have a simple structure, flexible operation, light weight, no sticking, and rapid opening and closing. They are suitable for conveying and regulating solid materials such as coal. Furthermore, they can be installed without angle restrictions, are easy to operate, and are well-adapted to coal blending systems.
[0050] In one embodiment, see Figure 3 and Figure 4 , the warehouse walls of the unloading part 12 and the discharge part 22 are both provided with inspection ports, and the inspection ports are hinged with warehouse doors 8. By opening and closing the warehouse doors 8, relevant operations can be carried out conveniently when the unloading part 12 or the discharge part 22 is blocked or requires maintenance.
[0051] In one embodiment, the conveying mechanism may be a belt conveyor or a scraper conveyor.
[0052] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. Double-chamber intelligent coal blending system, characterized by: It comprises a raw coal bunker (1), a buffer bunker (2), a coal distribution channel (3) and a coal feeder (4); the raw coal bunker (1), the buffer bunker (2) and the coal feeder (4) are arranged in a one-to-one correspondence and are at least two groups; The raw coal bin (1) comprises a storage portion (11) and a discharge portion (12); the storage portion (11) is the main body of the raw coal bin (1); a distribution pipe (13) connected to a coal distribution channel (3) is formed on the bin wall of the storage portion (11) and extends downward; the discharge portion (12) is the bottom end portion of the raw coal bin (1); the discharge portion (12) is connected to the top of the buffer bin (2); a first switch (131) is arranged on the distribution pipe (13), and a second switch (121) is arranged on the discharge portion (12); The coal distribution channel (3) has a reciprocating conveying mechanism inside, and the bottom of the coal distribution channel (3) is constructed with a plurality of connecting sections (31) corresponding to the buffer bin (2), and the two ends of the connecting sections (31) are respectively connected to the coal distribution channel (3) and the buffer bin (2); The buffer bin (2) comprises a transition portion (21) and a discharge portion (22). The transition portion (21) is in the shape of a cone that gradually converges from top to bottom. The top of the transition portion (21) is connected to a connecting section (31) and a discharge portion (12). The discharge portion (22) is connected to a coal feeder (4). A first rotary blockage clearing device (5) is arranged on the discharge portion (22).
2. The dual-chamber intelligent coal blending system according to claim 1 is characterized in that: A pulse pneumatic blowing device (6) or an air vibrator is provided on the connecting section (31).
3. The dual-chamber intelligent coal blending system according to claim 1, characterized in that: A plurality of pulse pneumatic blowing devices (6) are provided on a side wall of the transition portion (21) adjacent to the connecting section (31).
4. The dual-chamber intelligent coal blending system according to claim 1, characterized in that: The conveying mechanism is provided with a weighing element and a control system; When the coal falls onto the conveying mechanism from the distribution pipe (13), the weighing element feeds back the collected weight data to the control system, and the control system controls the conveying speed and conveying amount of the coal according to the collected weight data.
5. The dual-chamber intelligent coal blending system according to claim 1, characterized in that: A second rotary blockage clearing device (7) is also provided on the unloading portion (12), and the second rotary blockage clearing device (7) is located on the upstream side of the second switch (121).
6. The dual-chamber intelligent coal blending system according to claim 1, characterized in that: The first switch (131) and the second switch (121) are both one-way gate valves or two-way gate valves.
7. The dual-chamber intelligent coal blending system according to claim 1, characterized in that: Inspection openings are provided on the warehouse walls of the unloading portion (12) and the discharge portion (22), and the inspection openings are hinged with warehouse doors (8).
8. The dual-chamber intelligent coal blending system according to any one of claims 1 to 7, characterized in that: The conveying mechanism may be a belt conveyor or a scraper conveyor.