Fire coal blending device
By designing a coal-fired mixing device in a thermal power plant, using valves and partitions to control the conveying direction and speed of coal-fired coal, the proportional mixing of coal-fired coal is achieved, and the unsafe operation of boilers caused by coal-fired mixing is solved. The problem of excessive emissions improves the safety and economy of combustion and ensures compliance with emissions.
Patent Information
- Application Number
- CN202420356268.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2034-02-26
AI Technical Summary
Mixed use of different types of coal-fired coal has caused the safety and economy of boilers in thermal power plants to be threatened, resulting in excessive flue gas emissions and seriously endangering environmental safety.
Design a coal-fired mixing device, connecting different raw coal bins with coal feeders through vertical channels and partitions, and controlling the conveying direction and speed of coal-fired fueling is achieved by using valves to achieve proportional mixing of coal-fired fueling. Eliminate the horizontal component speed of coal burning to ensure the accuracy of the mixing ratio.
Maximize the safety and economy of combustion, ensure compliance with emission standards, improve the combustion characteristics and environmental protection characteristics of coal, ensure the safety and economy of the combustion process, and reduce the risk of environmental pollution.
Smart Images
Figure CN222111699U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal blending, and in particular to a coal blending device. Background Art
[0002] Due to the uncertainty of the coal market, it is difficult for existing thermal power plants to guarantee the use of designed coal-fired power generation. The types of coal purchased daily are varied, and the quality of the coal varies; even low-quality fuels such as urban sludge are mixed in the coal. The coal of different qualities to be used is generally stored in multiple different raw coal bunkers between coal bunkers. Multiple raw coal bunkers are generally arranged in rows horizontally and adjacent to each other. The current situation of mixing coal of different qualities has caused serious damage to the safety and economy of the operation of power station boilers in thermal power plants, causing smoke emissions to exceed the standard, seriously threatening environmental safety. Utility Model Content
[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the mixing of coal of different types and qualities causes serious harm to the safety and economy of power station boiler operation in thermal power plants, causes smoke emissions to exceed the standard, and seriously threatens environmental safety.
[0004] In order to solve the above problems, the utility model provides a coal blending device, comprising:
[0005] A first raw coal bunker is located above the coal feeder and is connected to a coal inlet of the coal feeder through a passage arranged in a vertical direction;
[0006] a partition plate, arranged in the channel, the partition plate dividing the channel into a first channel and a second channel both arranged in a vertical direction; a first valve is arranged between the first channel and the first raw coal bin, and a second valve is arranged between the second channel and the first raw coal bin;
[0007] A second raw coal bunker is connected to a first coal distribution port provided on a side wall of the first passage; the amount of coal delivered by the second raw coal bunker is suitable for being controlled so as to be proportioned with the coal delivered by the first raw coal bunker;
[0008] The coal blending device has the features of opening the second valve and closing the first valve, and the coal transported by the second raw coal bin hits the partition through the first coal blending port to eliminate the horizontal component velocity of the coal transported by the second raw coal bin, and then the coal transported by the second raw coal bin is mixed with the coal transported by the first raw coal bin through the second channel at the coal inlet of the coal feeder to obtain the first state of the designed coal that meets the requirements.
[0009] Optionally, it also includes:
[0010] A third raw coal bunker is connected to a second coal distribution port provided on the side wall of the second passage; the amount of coal delivered by the third raw coal bunker is suitable for being controlled so as to be proportioned with the coal delivered by the first raw coal bunker;
[0011] The coal blending device has the functions of closing the second valve, opening the first valve, stopping the coal transportation of the second raw coal bin, and the coal transported by the third raw coal bin hits the partition through the second coal blending port to eliminate the horizontal component velocity of the coal transported by the third raw coal bin, and then the coal transported by the third raw coal bin is mixed with the coal transported by the first raw coal bin through the first channel at the coal inlet of the coal feeder to obtain the second state of the designed coal that meets the requirements.
[0012] Optionally, the coal blending device has a second valve that is closed and a first valve that is closed, and the coal transported by the second raw coal bin hits the partition through the first coal distribution port to eliminate the horizontal component velocity of the coal transported by the second raw coal bin; the coal transported by the third raw coal bin hits the partition through the second coal distribution port to eliminate the horizontal component velocity of the coal transported by the third raw coal bin, and then the coal transported by the second raw coal bin is mixed with the coal transported by the third raw coal bin at the coal inlet of the coal feeder to obtain the third state of the designed coal that meets the requirements.
[0013] Optionally, the coal blending device has a fourth state of opening the second valve, opening the first valve, stopping the coal transportation from the second raw coal bin, stopping the coal transportation from the third raw coal bin, and only transporting coal to the coal feeder through the first raw coal bin.
[0014] Optionally, in the first state, by closing the second valve, coal is transported to the coal feeder only through the second raw coal bin; in the first state, by stopping the coal transportation of the second raw coal bin, coal is transported to the coal feeder only through the first raw coal bin.
[0015] Optionally, in the second state, by closing the first valve, coal is transported to the coal feeder only through the third raw coal bin; in the second state, by stopping the coal transportation of the third raw coal bin, coal is transported to the coal feeder only through the first raw coal bin.
[0016] Optionally, in the third state, by stopping the coal transportation of the third raw coal bin, coal is transported to the coal feeder only through the second raw coal bin; in the third state, by stopping the coal transportation of the second raw coal bin, coal is transported to the coal feeder only through the third raw coal bin.
[0017] Optionally, the channel is tubular.
[0018] Optionally, the cross-section of the channel is square.
[0019] Optionally, the cross-section of the channel is circular.
[0020] The above technical solution of the utility model has the following advantages compared with the prior art:
[0021] 1. The coal blending device provided by the utility model comprises: a first raw coal bin, which is located above a coal feeder and is connected to a coal inlet of the coal feeder through a channel arranged in a vertical direction; a partition plate is arranged in the channel, and the partition plate divides the channel into a first channel and a second channel both arranged in a vertical direction; a first valve is arranged between the first channel and the first raw coal bin, and a second valve is arranged between the second channel and the first raw coal bin; a second raw coal bin is connected to a first coal blending port arranged on a side wall of the first channel; the amount of coal transported by the second raw coal bin is suitable for control so as to be proportioned with the coal transported by the first raw coal bin; the coal blending device has a function of The second valve is opened, and the first valve is closed. The coal transported by the second raw coal bin hits the partition through the first coal distribution port to eliminate the horizontal component velocity of the coal transported by the second raw coal bin. Then the coal transported by the second raw coal bin is mixed with the coal transported by the first raw coal bin through the second channel at the coal inlet of the coal feeder to obtain the first state of the designed coal that meets the requirements. This application adopts the above technical solution to quickly and reasonably mix the different types of coal in the first raw coal bin and the second raw coal bin in proportion according to the combustion characteristics, environmental protection characteristics and economic characteristics, so as to maximize the safety and economy of combustion and ensure that the emission meets the standards, which is of great significance to the comprehensive utilization of national energy. In addition, the component velocity of coal in the horizontal direction is eliminated to ensure the accuracy of the mixing ratio.
[0022] 2. The coal blending device provided by the utility model also includes: a third raw coal bin, which is connected to the second coal distribution port provided on the side wall of the second channel; the amount of coal transported by the third raw coal bin is suitable for control so as to be proportioned with the coal transported by the first raw coal bin; the coal blending device has the function of closing the second valve, opening the first valve, stopping the coal transport of the second raw coal bin, and the coal transported by the third raw coal bin hits the partition through the second coal distribution port to eliminate the horizontal component velocity of the coal transported by the third raw coal bin, and then the coal transported by the third raw coal bin is mixed with the coal transported by the first raw coal bin through the first channel at the coal inlet of the coal feeder to obtain the second state of the designed coal that meets the requirements; the application adopts the above technical scheme, and according to the combustion characteristics, environmental protection characteristics and economic characteristics of different types of coal in the first raw coal bin and the third raw coal bin, the coal is quickly and reasonably blended in proportion, so as to meet the safety and economy of combustion to the maximum extent and ensure the emission standards. In addition, the component velocity of coal in the horizontal direction is eliminated to ensure the accuracy of the mixing ratio.
[0023] 3. The coal blending device of the utility model has the function of closing the second valve and closing the first valve, and the coal transported by the second raw coal bin hits the partition through the first coal distribution port to eliminate the horizontal component velocity of the coal transported by the second raw coal bin; the coal transported by the third raw coal bin hits the partition through the second coal distribution port to eliminate the horizontal component velocity of the coal transported by the third raw coal bin, and then the coal transported by the second raw coal bin is mixed with the coal transported by the third raw coal bin at the coal inlet of the coal feeder to obtain the third state of the designed coal that meets the requirements; this application adopts the above technical solution, and quickly and reasonably blends the coal of different qualities in the second raw coal bin and the third raw coal bin in proportion according to the combustion characteristics, environmental protection characteristics and economic characteristics, so as to maximize the safety and economy of combustion and ensure that the emission meets the standards. In addition, the component velocity of coal in the horizontal direction is eliminated to ensure the accuracy of the mixing ratio.
[0024] 4. In the first state, the utility model realizes that coal is transported to the coal feeder only through the second raw coal bin by closing the second valve; in the first state, coal transportation to the coal feeder is stopped by stopping the coal transportation of the second raw coal bin; the present application adopts the above technical solution to facilitate and quickly realize the switching of coal transportation between the second raw coal bin and the first raw coal bin.
[0025] 5. In the second state, the utility model realizes that coal is transported to the coal feeder only through the third raw coal bin by closing the first valve; in the second state, coal transportation to the coal feeder is stopped by stopping the coal transportation of the third raw coal bin; the present application adopts the above technical solution to facilitate and quickly realize the switching of coal transportation between the third raw coal bin and the first raw coal bin.
[0026] 6. In the third state, the utility model stops the coal transportation of the third raw coal bin, so that the coal is transported to the coal feeder only through the second raw coal bin; in the third state, stops the coal transportation of the second raw coal bin, so that the coal is transported to the coal feeder only through the third raw coal bin; the present application adopts the above technical solution to facilitate and quickly realize the switching of coal transportation between the third raw coal bin and the second raw coal bin. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 It is a schematic diagram of the structure of the coal blending device provided in the embodiment of the utility model.
[0029] Description of reference numerals:
[0030] 1. The first raw coal bunker; 2. The second raw coal bunker; 3. The third raw coal bunker; 4. Passageway; 5. Partition; 6. The first passageway; 7. The second passageway; 8. The first valve; 9. The second valve; 10. Coal feeder; 11. Coal inlet; 12. The first coal distribution port; 13. The second coal distribution port. DETAILED DESCRIPTION
[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0035] like Figure 1 A specific embodiment of the coal blending device shown includes: a first raw coal bin 1, a partition 5, a second raw coal bin 2 and a third raw coal bin 3. The coal blending device is suitable for being arranged in a thermal power plant, and can realize the interconnection between three raw coal bins for coal blending, and can also realize the interconnection between two adjacent raw coal bins for coal blending.
[0036] The first raw coal bin 1 is located above the coal feeder 10, and the first raw coal bin 1 is connected to the coal inlet 11 of the coal feeder 10 through a channel 4 arranged in the vertical direction. Specifically, the channel 4 is tubular. The cross section of the channel 4 is square or circular. The partition 5 is arranged in the channel 4, and the partition 5 divides the channel 4 into a first channel 6 and a second channel 7 both arranged in the vertical direction; a first valve 8 is arranged between the first channel 6 and the first raw coal bin 1, and a second valve 9 is arranged between the second channel 7 and the first raw coal bin 1. The second raw coal bin 2 is connected to the first coal distribution port 12 arranged on the side wall of the first channel 6; the amount of coal transported by the second raw coal bin 2 is suitable for control so as to be proportioned with the coal transported by the first raw coal bin 1. The third raw coal bin 3 is connected to the second coal distribution port 13 arranged on the side wall of the second channel 7; the amount of coal transported by the third raw coal bin 3 is suitable for control so as to be proportioned with the coal transported by the first raw coal bin 1. Figure 1 The arrow on the left indicates the direction of coal transportation from the second raw coal bunker 2, and the arrow on the right indicates the direction of coal transportation from the third raw coal bunker 3.
[0037] The coal blending device has the following features: opening the second valve 9, closing the first valve 8, and the coal transported by the second raw coal bin 2 hits the partition 5 through the first coal blending port 12 to eliminate the horizontal velocity component of the coal transported by the second raw coal bin 2, and then the coal transported by the second raw coal bin 2 is mixed with the coal transported by the first raw coal bin 1 through the second channel 7 at the coal inlet 11 of the coal feeder 10 to obtain the first state of the designed coal that meets the requirements. In the first state, by closing the second valve 9, it is realized that only the second raw coal bin 2 is used to transport coal to the coal feeder 10; in the first state, by stopping the transport of coal from the second raw coal bin 2, it is realized that only the first raw coal bin 1 is used to transport coal to the coal feeder 10.
[0038] The coal blending device has the following features: closing the second valve 9, opening the first valve 8, stopping the coal transportation of the second raw coal bin 2, and the coal transported by the third raw coal bin 3 hits the partition 5 through the second coal distribution port 13 to eliminate the horizontal velocity component of the coal transported by the third raw coal bin 3, and then the coal transported by the third raw coal bin 3 is mixed with the coal transported by the first raw coal bin 1 through the first channel 6 at the coal inlet 11 of the coal feeder 10 to obtain the second state of the designed coal that meets the requirements. In the second state, by closing the first valve 8, coal is transported to the coal feeder 10 only through the third raw coal bin 3; in the second state, by stopping the coal transportation of the third raw coal bin 3, coal is transported to the coal feeder 10 only through the first raw coal bin 1.
[0039] The coal blending device has the following features: closing the second valve 9, closing the first valve 8, the coal transported by the second raw coal bin 2 hits the partition 5 through the first coal distribution port 12 to eliminate the horizontal component velocity of the coal transported by the second raw coal bin 2; the coal transported by the third raw coal bin 3 hits the partition 5 through the second coal distribution port 13 to eliminate the horizontal component velocity of the coal transported by the third raw coal bin 3, and then the coal transported by the second raw coal bin 2 is mixed with the coal transported by the third raw coal bin 3 at the coal inlet 11 of the coal feeder 10 to obtain the third state of the designed coal that meets the requirements. In the third state, by stopping the coal transport of the third raw coal bin 3, only the second raw coal bin 2 is used to transport coal to the coal feeder 10; in the third state, by stopping the coal transport of the second raw coal bin 2, only the third raw coal bin 3 is used to transport coal to the coal feeder 10.
[0040] The coal blending device has a fourth state of opening the second valve 9, opening the first valve 8, stopping the coal transportation of the second raw coal bin 2, stopping the coal transportation of the third raw coal bin 3, and only transporting coal to the coal feeder 10 through the first raw coal bin 1.
[0041] The main working principle of the coal blending device described in the present application is briefly described as follows: Take the blending of coal transported by the second channel 7 and coal transported by the second raw coal bin 2 as an example. The function of the partition 5 arranged between the first channel 6 and the second channel 7 is to eliminate the component velocity of coal in the horizontal direction before the coal reaches the mixing interface. This is because the main factor interfering with the accuracy of the mixing ratio of the two coals is the mutual exclusion of the horizontal component velocities of the coals. Assume that the coal in the second channel 7 with a larger blending ratio first fills the space at the lower part of the outlet of the channel 4. The mixing interface often appears at the outlet of the first channel 6. The coal in the second raw coal bin 2 will meet the coal in the second channel 7 at the mixing interface. At the mixing interface, the original vertical component velocity of the coal in the second raw coal bin 2 will decay to be equal to the vertical component velocity of the coal in the second channel 7. The two coals will enter the coal feeder 10 along the descending channel of the coal inlet 11 according to their respective proportions to complete the blending.
[0042] The total amount of coal in the coal feeder 10 is measurable and a known quantity. The total amount of coal in the coal feeder 10 is the sum of the amount of coal in the second raw coal bin 2 and the amount of coal in the second channel 7. The amount of coal in the second raw coal bin 2 is adjustable and measurable and a known quantity; the amount of coal in the second channel 7 is not measurable and an unknown quantity.
[0043] If the coal quantity of the second raw coal bin 2 is changed, the coal quantity of the second channel 7 will automatically change accordingly, and the coal quantity of the second channel 7 is determined at all times. If the total coal quantity of the coal feeder 10 changes, no matter what the situation is, it is always ensured that the sum of the coal quantity of the second raw coal bin 2 and the coal quantity of the second channel 7 is the total coal quantity of the coal feeder 10.
[0044] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.
Claims
1. A coal blending device, characterized in that: include: A first raw coal bunker (1) is located above the coal feeder (10), and the first raw coal bunker (1) is connected to a coal inlet (11) of the coal feeder (10) through a passage (4) arranged in a vertical direction; a partition (5) arranged in the channel (4), the partition (5) dividing the channel (4) into a first channel (6) and a second channel (7) both arranged in a vertical direction; a first valve (8) is arranged between the first channel (6) and the first raw coal bin (1), and a second valve (9) is arranged between the second channel (7) and the first raw coal bin (1); The second raw coal bin (2) is connected to a first coal distribution port (12) provided on the side wall of the first passage (6); the amount of coal delivered by the second raw coal bin (2) is suitable for being controlled so as to be proportioned with the coal delivered by the first raw coal bin (1); The coal blending device has the following features: opening the second valve (9) and closing the first valve (8); the coal transported by the second raw coal bin (2) hits the partition (5) through the first coal blending port (12) to eliminate the horizontal velocity component of the coal transported by the second raw coal bin (2); then the coal transported by the second raw coal bin (2) is mixed with the coal transported by the first raw coal bin (1) through the second channel (7) at the coal inlet (11) of the coal feeder (10) to obtain a first state of the designed coal that meets the requirements.
2. The coal blending device according to claim 1, characterized in that: Also includes: The third raw coal bin (3) is connected to a second coal distribution port (13) provided on the side wall of the second passage (7); the amount of coal delivered by the third raw coal bin (3) is suitable for being controlled so as to be proportioned with the coal delivered by the first raw coal bin (1); The coal blending device has the functions of closing the second valve (9), opening the first valve (8), stopping the coal transportation of the second raw coal bin (2), and the coal transported by the third raw coal bin (3) hitting the partition (5) through the second coal blending port (13) to eliminate the horizontal component velocity of the coal transported by the third raw coal bin (3), and then the coal transported by the third raw coal bin (3) is mixed with the coal transported by the first raw coal bin (1) through the first channel (6) at the coal inlet port (11) of the coal feeder (10) to obtain a second state of the designed coal that meets the requirements.
3. The coal blending device according to claim 2, characterized in that: The coal blending device has the following features: the second valve (9) is closed, the first valve (8) is closed, the coal transported by the second raw coal bin (2) hits the partition (5) through the first coal distribution port (12) to eliminate the horizontal component velocity of the coal transported by the second raw coal bin (2); the coal transported by the third raw coal bin (3) hits the partition (5) through the second coal distribution port (13) to eliminate the horizontal component velocity of the coal transported by the third raw coal bin (3), and then the coal transported by the second raw coal bin (2) is mixed with the coal transported by the third raw coal bin (3) at the coal inlet port (11) of the coal feeder (10) to obtain a third state of the designed coal that meets the requirements.
4. The coal blending device according to claim 2, characterized in that: The coal blending device has a fourth state in which the second valve (9) is opened, the first valve (8) is opened, the coal transportation from the second raw coal bin (2) is stopped, the coal transportation from the third raw coal bin (3) is stopped, and the coal is only transported to the coal feeder (10) through the first raw coal bin (1).
5. The coal blending device according to any one of claims 1 to 4, characterized in that: In the first state, by closing the second valve (9), coal is transported to the coal feeder (10) only through the second raw coal bin (2); in the first state, by stopping the transport of coal from the second raw coal bin (2), coal is transported to the coal feeder (10) only through the first raw coal bin (1).
6. The coal blending device according to any one of claims 2 to 4, characterized in that: In the second state, by closing the first valve (8), coal is transported to the coal feeder (10) only through the third raw coal bin (3); in the second state, by stopping the transport of coal from the third raw coal bin (3), coal is transported to the coal feeder (10) only through the first raw coal bin (1).
7. The coal blending device according to claim 3, characterized in that: In the third state, by stopping the transportation of coal from the third raw coal bin (3), coal is transported to the coal feeder (10) only through the second raw coal bin (2); in the third state, by stopping the transportation of coal from the second raw coal bin (2), coal is transported to the coal feeder (10) only through the third raw coal bin (3).
8. The coal blending device according to any one of claims 1 to 4, characterized in that: The channel (4) is tubular.
9. The coal blending device according to claim 8, characterized in that: The cross section of the channel (4) is square.
10. The coal blending device according to claim 8, characterized in that: The cross section of the channel (4) is circular.