Adjacent raw coal bunker interconnection and intercommunication coal blending system and use method

Abstract

The invention relates to the technical field of coal distribution, in particular to an adjacent raw coal bunker interconnection and intercommunication coal distribution system and a use method. A coal blending system with interconnected and intercommunicated adjacent raw coal bins comprises a first raw coal bin containing first fire coal; the second raw coal bunker and the first raw coal bunker are arranged in a spaced mode, and second fire coal is contained in the second raw coal bunker; a first buffer coal bucket; the second buffer coal hopper and the first buffer coal hopper are arranged at an interval; and the conveyor is respectively communicated with the first raw coal bunker, the second raw coal bunker, the first buffer coal hopper and the second buffer coal hopper. The invention provides an adjacent raw coal bunker interconnection and intercommunication coal blending system and a use method, and aims to solve the problems that most raw coal bunkers are in an independent coal supply mode, no interconnection and intercommunication structure exists between adjacent coal bunkers, and the coal quality cannot be quickly allocated.

Description

An interconnected coal distribution system for adjacent raw coal bunkers and its usage method Technical Field

[0001] This invention relates to the field of coal distribution technology, specifically to an interconnected coal distribution system between adjacent raw coal bunkers and its usage method. Background Technology

[0002] The increasing proportion of new energy sources has shifted coal-fired power to a supplementary role in peak shaving. Coal-fired power units need to improve their peak shaving flexibility. However, most existing raw coal bunkers operate on an independent coal supply model, with no interconnection between adjacent bunkers, making it impossible to quickly allocate coal quality. Summary of the Invention

[0003] This invention provides an interconnected coal distribution system and its usage method for adjacent raw coal bunkers, in order to solve the problem that raw coal bunkers are mostly supplied independently, and there is no interconnection structure between adjacent coal bunkers, making it impossible to quickly adjust the coal quality.

[0004] In a first aspect, the present invention provides an interconnected coal distribution system for adjacent raw coal bunkers, comprising: a first raw coal bunker containing a first type of coal; a second raw coal bunker, which is spaced apart from the first raw coal bunker and contains a second type of coal; a first buffer coal hopper; a second buffer coal hopper, which is spaced apart from the first buffer coal hopper; and a conveyor that connects the first raw coal bunker, the second raw coal bunker, the first buffer coal hopper, and the second buffer coal hopper respectively.

[0005] Beneficial effects: The conveyor pushes the first coal in the first raw coal bunker to the second buffer coal hopper, or pushes the second coal in the second raw coal bunker to the first buffer coal hopper, so that the first buffer coal hopper stores the second coal from the second raw coal bunker and the second buffer coal hopper stores the first coal from the first raw coal bunker. This realizes the interconnection between adjacent raw coal bunkers, allows for rapid coal allocation, and ensures the stability of coal transportation between adjacent raw coal bunkers.

[0006] In one optional embodiment, the first raw coal bunker includes a first coal intake port connected to the conveyor, the second raw coal bunker includes a second coal intake port connected to the conveyor, and the first coal and the second coal are different.

[0007] Beneficial effect: The coal in the first receiving chamber of the first raw coal bunker (which is connected to the first coal intake port) and the second receiving chamber of the second raw coal bunker (which is connected to the second coal intake port) are of different types, and they need to be mixed before they can be burned.

[0008] In one optional embodiment, the first coal outlet of the first coal intake port is connected to the first coal inlet of the conveyor, and the second coal outlet of the second coal intake port is connected to the second coal inlet of the conveyor.

[0009] Beneficial effects: The first coal inlet of the first coal outlet is connected to the first raw coal bunker, so that a portion of the first coal in the first raw coal bunker enters the first coal outlet through the first coal inlet, and then enters the conveyor through the first coal outlet; the second coal inlet of the second coal outlet is connected to the second raw coal bunker, so that a portion of the second coal in the second raw coal bunker enters the second coal outlet through the second coal inlet, and then enters the conveyor through the second coal outlet.

[0010] In one optional embodiment, the system further includes a first three-way valve and a second three-way valve. The first three-way valve is connected to the first coal outlet of the first buffer coal hopper and the first coal drop outlet of the first raw coal bunker, respectively. The second three-way valve is connected to the second coal outlet of the second buffer coal hopper and the second coal drop outlet of the second raw coal bunker, respectively.

[0011] Beneficial effect: Coal from the first raw coal bunker, through the first coal drop outlet and the first buffer coal hopper, falls into the first three-way valve through the first coal outlet, and coal from the second raw coal bunker and the second buffer coal hopper falls into the second three-way valve.

[0012] In one optional embodiment, the system further includes a first coal feeder and a second coal feeder, wherein the first coal feeder is connected to the first three-way valve and the second coal feeder is connected to the second three-way valve.

[0013] Beneficial effect: The first coal dropped by the first three-way valve falls onto the belt of the first coal feeder, and the second coal dropped by the second three-way valve falls onto the belt of the second coal feeder.

[0014] In one optional embodiment, a first coal level sensor is provided in the first buffer coal hopper, and the first coal level sensor is located on the inner wall of the first buffer coal hopper and is positioned close to the conveyor. A second coal level sensor is provided in the second buffer coal hopper, and the second coal level sensor is located on the inner wall of the second buffer coal hopper and is positioned close to the conveyor.

[0015] Beneficial effects: A first coal level sensor is installed in the first buffer coal hopper to sense the coal level height within it, and a second coal level sensor is installed in the second buffer coal hopper to sense the coal level height within it. By setting up buffer coal hoppers, a buffer space is provided between the upstream conveyor and the downstream feeder when there is a mismatch in flow rates. Coal level sensors installed within the buffer coal hoppers are used to control the output flow rate of the upstream conveyor to better match the coal flow rate required by the downstream feeder.

[0016] In one optional embodiment, the system further includes anti-blocking devices, wherein the first buffer coal hopper is provided with a plurality of the anti-blocking devices along its own length, and the second buffer coal hopper is provided with a plurality of the anti-blocking devices along its own length.

[0017] In one alternative embodiment, the conveyor includes a conveying cylinder containing helical blades. A power unit is provided at the end of the helical blades extending from the conveying cylinder to drive the helical blades to rotate forward or in reverse.

[0018] In one alternative embodiment, the system further includes a controller, which is connected to the first three-way valve, the second three-way valve, and the power component circuit, respectively.

[0019] Secondly, the present invention also provides a method for using an interconnected coal distribution system for adjacent raw coal bunkers, wherein a conveyor pushes the first coal in the first raw coal bunker to the second buffer coal hopper, or pushes the second coal in the second raw coal bunker to the first buffer coal hopper. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 is a front view of the interconnected coal distribution system of adjacent raw coal bunkers according to an embodiment of the present invention; Figure 2 is a schematic diagram of the connection between the first three-way valve and the first coal feeder according to an embodiment of the present invention; Figure 3 is a schematic diagram of the conveyor according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Conveyor; 101. Power component; 102. Spiral blade; 103. Conveyor cylinder; 2. First buffer coal hopper; 201. First coal inlet; 202. First coal outlet; 3. Second buffer coal hopper; 301. Second coal inlet; 302. Second coal outlet; 4. First raw coal bunker; 401. First receiving bunker; 402. First coal drop outlet; 403. First coal take-out outlet; 4031. First coal take-out inlet; 4032. First coal take-out outlet; 5. Second raw coal bunker; 501. Second coal take-out outlet; 6. First three-way valve; 7. Second three-way valve; 8. First coal inlet end; 9. Second coal outlet end; 10. First coal feeder; 11. Adjusting baffle; 12. Second coal inlet end; 13. First coal outlet end. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The embodiments of the present invention will now be described with reference to Figures 1 to 3.

[0025] According to an embodiment of the present invention, in one aspect, an interconnected coal distribution system for adjacent raw coal bunkers is provided, comprising a first raw coal bunker 4 containing a first coal; a second raw coal bunker 5, which is spaced apart from the first raw coal bunker 4 and contains a second coal; a first buffer coal hopper 2; a second buffer coal hopper 3, which is spaced apart from the first buffer coal hopper 2; and a conveyor 1, which connects the first raw coal bunker 4, the second raw coal bunker 5, the first buffer coal hopper 2, and the second buffer coal hopper 3 respectively.

[0026] Conveyor 1 pushes the first coal in the first raw coal bunker 4 to the second buffer coal hopper 3, or pushes the second coal in the second raw coal bunker 5 to the first buffer coal hopper 2. By setting up the first buffer coal hopper 2 and the second buffer coal hopper 3, the first buffer coal hopper 2 contains the second coal from the second raw coal bunker 5, and the second buffer coal hopper 3 contains the first coal from the first raw coal bunker 4. This achieves interconnection between adjacent raw coal bunkers, allowing for rapid coal allocation and ensuring the stability of coal transportation between adjacent raw coal bunkers. It should be noted that in this embodiment, conveyor 1 is a screw conveyor 1, and the screw conveyor 1 is horizontally arranged.

[0027] In one embodiment, as shown in Figures 1 and 2, the first raw coal bunker 4 includes a first coal intake 403 connected to the conveyor 1, and the second raw coal bunker 5 includes a second coal intake 501 connected to the conveyor 1. The first and second coals are different; the first coal from the first raw coal bunker 4 enters the conveyor 1 through the first coal intake 403, or the second coal from the second raw coal bunker 5 enters the conveyor 1 through the second coal intake 501. It should be noted that the types of coal in the first receiving chamber 401 of the first raw coal bunker 4 (connected to the first coal intake 403) and the second receiving chamber of the second raw coal bunker 5 (connected to the second coal intake 501) are different (e.g., high-sulfur coal in the first raw coal bunker 4 and easily coking coal in the second raw coal bunker 5), and they need to be mixed before combustion.

[0028] In one embodiment, as shown in Figures 1 and 2, the first coal outlet 4032 of the first coal intake 403 is connected to the first coal inlet 8 of the conveyor 1, and the second coal outlet 501 is connected to the second coal inlet 12 of the conveyor 1. It should be noted that the first coal inlet 4031 of the first coal intake 403 is connected to the first raw coal bunker 4, allowing a portion of the first coal in the first raw coal bunker 4 to enter the first coal intake 403 via the first coal inlet 4031 and then enter the conveyor 1 via the first coal outlet 4032; the second coal inlet of the second coal intake 501 is connected to the second raw coal bunker 5, allowing a portion of the second coal in the second raw coal bunker 5 to enter the second coal intake 501 via the second coal inlet and then enter the conveyor 1 via the second coal outlet.

[0029] In this embodiment, the conveyor 1 includes a first coal inlet end 8, a first coal outlet end 13, a second coal inlet end 12, and a second coal outlet end 9. The first coal inlet end 8 is connected to the first coal outlet 4032 of the first coal take-out port 403, and the first coal outlet end 13 is connected to the first coal inlet 201 of the first buffer coal hopper 2. The second coal inlet end 12 is connected to the second coal outlet of the second coal take-out port 501, and the second coal outlet end 9 is connected to the second coal inlet 301 of the second buffer coal hopper 3. It should be noted that the first coal inlet end 8, the second coal inlet end 12, the first coal outlet end 13, and the second coal outlet end 9 are each equipped with a control valve, and the coal inlet and outlet are controlled by opening and closing the control valves.

[0030] In one embodiment, as shown in Figures 1 and 2, the system further includes a first three-way valve 6 and a second three-way valve 7. The first three-way valve 6 is connected to the first coal outlet 202 of the first buffer coal hopper 2 and the first coal drop outlet 402 of the first raw coal bunker 4, respectively. The second three-way valve 7 is connected to the second coal outlet 302 of the second buffer coal hopper 3 and the second coal drop outlet of the second raw coal bunker 5, respectively. Coal from the first raw coal bunker 4, through the first coal drop outlet 402 and the first buffer coal hopper 2, falls into the first three-way valve 6 through the first coal outlet 202. Coal from the second raw coal bunker 5 and the second buffer coal hopper 3 falls into the second three-way valve 7. It should be noted that a rotating motor is provided on the outer wall of either the first three-way valve 6 or the second three-way valve 7. The rotating motor drives the rotary blade located on the inner wall of the three-way valve to rotate, thereby preventing coal from sticking to the inner wall of the three-way valve.

[0031] In one embodiment, as shown in Figures 1 and 2, a first coal feeder 10 and a second coal feeder are also included. The first coal feeder 10 is connected to a first three-way valve 6, and the second coal feeder is connected to a second three-way valve 7. It should be noted that the first coal falling from the first three-way valve 6 lands on the belt of the first coal feeder 10, and the second coal falling from the second three-way valve 7 lands on the belt of the second coal feeder. It should also be noted that in this embodiment, the first three-way valve 6 is arranged along the conveying direction of the first coal feeder 10 at the connection between the first coal outlet 202 of the first buffer coal hopper 2 and the first coal drop outlet 402 of the first raw coal bunker 4; the second three-way valve 7 is arranged along the conveying direction of the second coal feeder 10 at the connection between the second coal outlet 302 of the second buffer coal hopper 3 and the second coal drop outlet of the second raw coal bunker 5.

[0032] In one embodiment, a first coal level sensor is installed in the first buffer coal hopper 2, located on the inner wall of the first buffer coal hopper 2 and close to the conveyor 1. A second coal level sensor is installed in the second buffer coal hopper 3, also located on the inner wall of the second buffer coal hopper 3 and close to the conveyor 1. Specifically, the first coal level sensor is located in the first buffer coal hopper 2 near the first coal outlet 13 to sense the coal level height in the first buffer coal hopper 2, and the second coal level sensor is located in the second buffer coal hopper 3 near the second coal outlet 9 to sense the coal level height in the second buffer coal hopper 3. By setting up buffer coal hoppers, a buffer space is provided between the upstream conveyor 1 and the downstream coal feeder when the flow rates are mismatched. The coal level sensor in the buffer coal hopper is used to control the output flow rate of the upstream conveyor 1 to better match the coal flow rate required by the downstream coal feeder.

[0033] In one embodiment, the device further includes anti-blocking devices. The first buffer coal hopper 2 is provided with a plurality of anti-blocking devices along its own length, and the second buffer coal hopper 3 is provided with a plurality of anti-blocking devices along its own length. The anti-blocking devices provided on the first buffer coal hopper 2 are used to prevent the first buffer coal hopper 2 from becoming blocked, and the anti-blocking devices provided on the second buffer coal hopper 3 are used to prevent the second buffer coal hopper 3 from becoming blocked.

[0034] In one embodiment, as shown in Figures 1 and 3, the conveyor 1 includes a conveying cylinder 103 with a receiving space containing material. The conveying cylinder 103 is adapted to connect adjacent buffer coal hoppers, each buffer coal hopper corresponding to a coal bunker. A helical blade 102 is disposed within the receiving space and includes at least two spaced-apart blades. The conveying cylinder 103 connects adjacent buffer coal hoppers, and the helical blade 102 is driven to transport coal from one buffer coal hopper to another, facilitating rapid coal quality adjustment. It should be noted that the helical blade 102 can rotate forward and reverse to achieve movement between "first raw coal bunker 4 → second buffer coal hopper 3" or "second raw coal bunker 5 → first buffer coal hopper 2".

[0035] In this embodiment, the first three-way valve 6 and the second three-way valve 7 are respectively equipped with adjusting baffles 11. By adjusting the opening of the adjusting baffles 11, the volume of different types of coal entering the first coal feeder 10 or the second coal feeder is controlled, thereby achieving precise blending of two different types of coal and preventing excessive environmental emissions and severe boiler coking. It should be noted that the adjusting baffles 11 are used by automated control to control the volume of coal entering the first coal feeder 10 or the second coal feeder. It should also be noted that adjusting the opening of this baffle can adjust the coal inlet volume ratio between the two feed inlets, achieving blending according to volume ratio, thus enabling the blending of two different types of coal in adjacent raw coal bunkers.

[0036] In one embodiment, the system further includes a controller, which is connected to the first three-way valve 6, the second three-way valve 7, the first high-level coal level sensor, the first low-level coal level sensor, the second high-level coal level sensor, the second low-level coal level sensor, the power component 101, the regulating baffle 11, and the control valve lines at each coal inlet and coal outlet to achieve automatic control.

[0037] According to an embodiment of the present invention, in another aspect, a method for using an interconnected coal distribution system for adjacent raw coal bunkers is also provided, comprising the following steps: (1) When it is necessary to transfer coal from the first raw coal bunker 4 to the second buffer coal hopper 3, the power component 101 of the conveyor 1 is started, and the control valve at the first coal inlet 8 and the control valve at the second coal outlet 9 are opened, so that the spiral blades 102 push the coal from the first coal outlet 403 toward the second buffer coal hopper 3; when it is necessary to transfer coal from the second raw coal bunker 5 to the first buffer coal hopper 2, the power component 101 of the conveyor 1 is started, and the control valve at the second coal inlet 12 and the first... The control valve at the coal outlet 13 causes the spiral blade 102 to push the coal from the second coal outlet 501 toward the first buffer coal hopper 2; (2) the coal in the first buffer coal hopper 2 falls into the first three-way valve 6 under the action of gravity, and the coal in the second buffer coal hopper 3 falls into the second three-way valve 7 under the action of gravity. The amount of coal entering the first coal feeder 10 is adjusted by adjusting the adjusting baffle 11 of the first three-way valve 6, and the opening of the adjusting baffle 11 of the second three-way valve 7 is adjusted to adjust the amount of coal entering the second coal feeder, so as to achieve precise blending of two different types of coal, and prevent environmental emissions from exceeding the standard and serious coking of the boiler.

[0038] As an alternative implementation, the conveyor 1 can also be a bidirectional conveyor belt conveyor or a bidirectional scraper conveyor 1, both of which are devices with forward and reverse conveying functions.

[0039] As an alternative implementation, the conveyor 1 can also be inclined.

[0040] The interconnected coal distribution system between adjacent raw coal bunkers provided by the present invention has the following advantages: (1) The conveyor 1 pushes the first coal in the first raw coal bunker 4 to the second buffer coal hopper 3, or pushes the second coal in the second raw coal bunker 5 to the first buffer coal hopper 2, so that the first buffer coal hopper 2 contains the second coal from the second raw coal bunker 5 and the second buffer coal hopper 3 contains the first coal from the first raw coal bunker 4, realizing the interconnection between adjacent raw coal bunkers, enabling rapid coal distribution, and ensuring the stability of coal transportation between adjacent raw coal bunkers; (2) The spiral blades 102 are driven to rotate to push the material along the conveying cylinder, improving the conveying efficiency, eliminating the problem of blockage in the conveying cylinder, and improving the user experience; (3) The two coal outlets of the conveyor 1 are connected to the first buffer coal hopper 2 and the second buffer coal hopper 3 respectively. The buffer coal hopper serves as a buffer coal storage unit to decouple the synchronization contradiction between the conveying flow rate and the demand flow rate of the coal feeder 10, avoiding coal shortage or coal accumulation caused by the mismatch of the two flow rates; 4) By setting baffles through the first three-way valve 6 and the second three-way valve 7, the blending ratio can be precisely controlled by adjusting the opening of the baffle 11 to achieve reasonable blending of high-sulfur coal and easily coking coal, and prevent environmental emissions from exceeding standards and serious coking of the boiler; (5) The buffer coal hopper stores excess raw coal or supplements the insufficient coal supply of the screw conveyor, eliminating the flow synchronization limitation between the screw conveyor and the coal feeder. No matter how the flow of the screw conveyor fluctuates, the buffer coal hopper can provide a stable source of raw coal for the coal feeder; 6) The raw coal from the first buffer coal hopper 2 and the original raw coal from the first raw coal bin 4 enter the first three-way valve 6. According to the unit's combustion requirements and environmental protection indicators, the opening of the coal blending volume ratio regulating baffle 11 is adjusted to precisely control the coal blending ratio. In particular, it can achieve reasonable blending of high-sulfur coal and easily coking coal to prevent excessive environmental emissions and serious coking in the boiler. The blended raw coal enters the first coal feeder 10. The same applies to the second buffer coal hopper 3 side, so as to achieve precise blending of coal quality from the first and second coal feeders to meet the unit's load requirements.

[0041] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A coal distribution system for interconnecting adjacent raw coal bunkers, characterized in that, include: The first raw coal bunker (4) contains the first coal; the second raw coal bunker (5) is spaced apart from the first raw coal bunker (4) and contains the second coal; the first buffer coal hopper (2); the second buffer coal hopper (3) is spaced apart from the first buffer coal hopper (2); the conveyor (1) is connected to the first raw coal bunker (4), the second raw coal bunker (5), the first buffer coal hopper (2) and the second buffer coal hopper (3) respectively.

2. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 1, characterized in that, The first raw coal bunker (4) includes a first coal intake port (403), which is connected to the conveyor (1). The second raw coal bunker (5) includes a second coal intake port (501), which is connected to the conveyor (1). The first coal and the second coal are different.

3. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 2, characterized in that, The first coal outlet (4032) of the first coal inlet (403) is connected to the first coal inlet (8) of the conveyor (1), and the second coal outlet of the second coal inlet (501) is connected to the second coal inlet (12) of the conveyor (1).

4. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 3, characterized in that, It also includes a first three-way valve (6) and a second three-way valve (7). The first three-way valve (6) is connected to the first coal outlet (202) of the first buffer coal hopper (2) and the first coal drop outlet (402) of the first raw coal bunker (4), respectively. The second three-way valve (7) is connected to the second coal outlet (302) of the second buffer coal hopper (3) and the second coal drop outlet of the second raw coal bunker (5), respectively.

5. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 4, characterized in that, It also includes a first coal feeder (10) and a second coal feeder, wherein the first coal feeder (10) is connected to the first three-way valve (6) and the second coal feeder is connected to the second three-way valve (7).

6. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 4, characterized in that, The first buffer coal hopper (2) is equipped with a first coal level sensor, which is located on the inner wall of the first buffer coal hopper (2) and is located close to the conveyor (1). The second buffer coal hopper (3) is equipped with a second coal level sensor, which is located on the inner wall of the second buffer coal hopper (3) and is located close to the conveyor (1).

7. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 2, characterized in that, It also includes anti-blocking devices. The first buffer coal hopper (2) is provided with a number of the anti-blocking devices along its own length, and the second buffer coal hopper (3) is provided with a number of the anti-blocking devices along its own length.

8. The interconnected coal distribution system for adjacent raw coal bunkers according to claim 2, characterized in that, The conveyor (1) includes a conveying cylinder (103), which contains a spiral blade (102). The spiral blade (102) extends out of the end of the conveying cylinder (103) and is provided with a power member (101). The power member (101) drives the spiral blade (102) to rotate forward or backward.

9. The interconnected coal distribution system for adjacent raw coal bunkers according to any one of claims 1-8, characterized in that, It also includes a controller, which is connected to the first three-way valve (6), the second three-way valve (7), and the power component (101) respectively.

10. A method of using an interconnected coal distribution system for adjacent raw coal bunkers, for using the interconnected coal distribution system for adjacent raw coal bunkers as described in claim 1, characterized in that, The conveyor (1) pushes the first coal in the first raw coal bunker (4) to the second buffer coal hopper (3), or pushes the second coal in the second raw coal bunker (5) to the first buffer coal hopper (2).

Images