Blast furnace coal injection system and method, electronic equipment and medium

Abstract

The invention provides a blast furnace coal injection system and method, electronic equipment and a medium, and relates to the technical field of blast furnace pulverized coal injection control, and the blast furnace coal injection system comprises an injection main pipe, a pulverized coal distributor, coal injection branch pipes, a spray gun, a controller, and branch pipe coal valves, pulverized coal flow meters and coal flow regulating valves which are sequentially arranged on each coal injection branch pipe. Pulverized coal is input into the blast furnace coal injection system through the input end of the main injection pipe, the input end of the pulverized coal distributor is connected with the output end of the main injection pipe, the output end of the pulverized coal distributor is provided with a plurality of coal injection output ports, each coal injection output port is connected with a coal injection branch pipe, and one end of the spray gun is connected with the output end of the coal injection branch pipe. The other end of the spray gun is inserted into the blast furnace, and the controller is connected with each branch pipe coal valve, each pulverized coal flow meter and each coal flow adjusting valve. By adjusting the opening degree of the target coal flow adjusting valve until the real-time coal injection rate is consistent with the coal injection rate of the branch pipe, the equal amount of coal powder can be distributed to each coal injection branch pipe, and the operation stability of the blast furnace can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace pulverized coal injection control, and in particular to a blast furnace pulverized coal injection system, method, electronic equipment and medium. Background Art

[0002] At present, the blast furnace coal injection system basically adopts single-pipeline injection, that is, the coal powder enters the injection pipe from the injection tank, and then enters the coal powder distributor through the injection pipe. The coal powder distributor distributes the coal powder in the injection pipe to each tuyere of the blast furnace. Since the internal structure of the coal powder distributor is cavity-type, the coal powder is randomly distributed to the coal injection branch pipe, and the uniformity of distribution cannot be achieved. There are situations where the coal injection rate of some tuyere is high and the coal injection rate of some tuyere is low (the rate difference between each tuyere is large), resulting in uneven and fluctuating temperatures of each tuyere, affecting the condition of the blast furnace and stable operation. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned related technologies, the present application provides a blast furnace coal injection system, method, electronic equipment and medium to solve the above-mentioned technical problems.

[0004] The present application provides a blast furnace coal injection system, comprising:

[0005] An injection pipe, through which the pulverized coal is input into the blast furnace coal injection system;

[0006] The input end of the pulverized coal distributor is connected to the output end of the injection main pipe, and the output end of the pulverized coal distributor has a plurality of coal injection output ports;

[0007] A coal injection branch pipe, each of the coal injection outlets is provided with a coal injection branch pipe, and each of the coal injection branch pipes is provided with a branch pipe coal valve, a coal powder flow meter and a coal flow regulating valve in sequence;

[0008] A spray gun, one end of which is connected to the output end of the coal injection branch pipe, and the other end of which is inserted into the blast furnace;

[0009] A controller, connected to each branch pipe coal valve, each pulverized coal flow meter and each coal flow regulating valve, is used to determine the number of working coal valves according to the current state of each branch pipe coal valve; and determine the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the number of the working coal valves; open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter; adjust the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate;

[0010] Among them, the working coal valve is a branch coal valve whose current state is open, the target coal flow regulating valve is a coal flow regulating valve located in the same coal injection branch as the working coal valve, and the target coal powder flow meter is a coal powder flow meter located in the same coal injection branch as the working coal valve.

[0011] In one embodiment of the present application, the lengths of each of the coal injection branch pipes are equal.

[0012] In one embodiment of the present application, the blast furnace coal injection system also includes a nitrogen input branch connected to each of the coal injection branch pipes, and a nitrogen valve and a nitrogen input device are provided on the nitrogen input branch. Nitrogen is stored in the nitrogen input device, and the nitrogen input branch is arranged between the branch pipe coal valve and the coal powder flow meter.

[0013] To achieve the above-mentioned purpose and other related purposes, the present application provides a blast furnace coal injection method, which is applied to the blast furnace coal injection system as described above, and the blast furnace coal injection method comprises:

[0014] According to the current state of each branch pipe coal valve, determine the number of working coal valves among all branch pipe coal valves;

[0015] Determining the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the number of the working coal valves;

[0016] Open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter;

[0017] The opening of the target coal flow regulating valve is adjusted until the real-time coal injection rate is consistent with the branch pipe coal injection rate.

[0018] In one embodiment of the present application, adjusting the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate includes:

[0019] If the real-time coal injection rate is less than the branch pipe coal injection rate when the first coal flow regulating valve is adjusted to the maximum opening, the first working coal valve in the same coal injection branch pipe as the first coal flow regulating valve is closed;

[0020] Opening the first nitrogen valve to pass nitrogen to purge the coal injection branch pipe that closes the first working coal valve, wherein the first nitrogen valve and the first working coal valve are located in the same coal injection branch pipe;

[0021] The nitrogen valve is closed after being opened for a preset time.

[0022] In one embodiment of the present application, after closing the first working coal valve located in the same coal injection branch pipe as the first coal flow regulating valve, the method further includes:

[0023] updating the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the current number of the working coal valves;

[0024] Open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter;

[0025] Adjust the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the updated branch pipe coal injection rate.

[0026] To achieve the above objectives and other related objectives, the present application also provides an electronic device, the electronic device comprising:

[0027] one or more processors;

[0028] The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device implements the blast furnace coal injection method as described above.

[0029] To achieve the above-mentioned purpose and other related purposes, the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the blast furnace coal injection method as described above.

[0030] As described above, the blast furnace coal injection system, method, electronic equipment and medium provided by the present application have the following beneficial effects:

[0031] A blast furnace coal injection system in the present application comprises a main injection pipe, a pulverized coal distributor, a coal injection branch pipe, a spray gun, a controller, and a branch pipe coal valve, a pulverized coal flow meter, and a coal flow regulating valve sequentially arranged on each coal injection branch pipe. The pulverized coal is input into the blast furnace coal injection system through the input end of the injection pipe, the input end of the pulverized coal distributor is connected to the output end of the injection pipe, the output end of the pulverized coal distributor has a plurality of coal injection output ports, each coal injection output port is connected to a coal injection branch pipe, one end of the spray gun is connected to the output end of the coal injection branch pipe, the other end of the spray gun is inserted into the blast furnace, and the controller is connected to each branch pipe coal valve, each pulverized coal flow meter, and each coal flow regulating valve. By setting a branch coal valve, a pulverized coal flow meter, a coal flow regulating valve and a controller, the branch coal injection rate of the branch coal valve which is currently in the open state is calculated by the controller, and according to the real-time coal injection rate and the branch coal injection rate obtained by the pulverized coal flow meter, the opening of the target coal flow regulating valve is adjusted until the real-time coal injection rate and the branch coal injection rate are consistent, so that an equal amount of pulverized coal can be distributed to each coal injection branch, thereby improving the stability of blast furnace operation.

[0032] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0034] Figure 1 is a structural schematic diagram of a blast furnace coal injection system shown in an exemplary embodiment of the present application;

[0035] Figure 2 It is a flow chart of a blast furnace coal injection method shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0036] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0038] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0039] See also Figure 1 , Figure 1 Schematic diagram of the structure of a blast furnace coal injection system shown in an exemplary embodiment of the present application. Figure 1 It can be seen that the blast furnace coal injection system may include:

[0040] The coal injection main pipe 110 , the pulverized coal distributor 120 , the coal injection branch pipe 130 , the branch pipe coal valve 140 , the pulverized coal flow meter 150 , the coal flow regulating valve 160 , the spray gun 170 and the controller 180 .

[0041] The pulverized coal is input into the blast furnace coal injection system through the input end of the injection main pipe 110 .

[0042] The input end of the pulverized coal distributor 120 is connected to the output end of the injection main pipe 110, and the output end of the pulverized coal distributor 120 has a plurality of coal injection output ports ( Figure 1 Only two coal injection output ports are shown, which are connected to two coal injection branch pipes).

[0043] Each coal injection outlet is connected to a coal injection branch pipe 130, and each coal injection branch pipe 130 is sequentially provided with a branch pipe coal valve 140, a coal powder flow meter 150 and a coal flow regulating valve 160;

[0044] One end of the lance 170 is connected to the output end of the coal injection branch pipe 130 , and the other end of the lance 170 is inserted into the blast furnace 200 .

[0045] The controller 180 is connected to each branch pipe coal valve 140, each pulverized coal flow meter 150 and each coal flow regulating valve 160, and is used to determine the number of working coal valves according to the current state of each branch pipe coal valve; and determine the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the number of working coal valves; open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter; adjust the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate;

[0046] Among them, the working coal valve is a branch coal valve whose current state is open, the target coal flow regulating valve is a coal flow regulating valve located in the same coal injection branch as the working coal valve, and the target coal powder flow meter is a coal powder flow meter located in the same coal injection branch as the working coal valve.

[0047] In one embodiment of the present application, the lengths of each coal injection branch pipe 130 may be equal, so as to improve the uniformity of coal injection by the injection gun.

[0048] In one embodiment of the present application, the blast furnace coal injection system may further include a nitrogen input branch connected to each coal injection branch pipe, a nitrogen valve 191 and a nitrogen input device 192 are provided on the nitrogen input branch pipe, nitrogen is stored in the nitrogen input device 192, and the nitrogen input branch pipe is provided between the branch pipe coal valve 140 and the pulverized coal flow meter 150. The nitrogen valve 191 may also be connected to the controller 180 ( Figure 1 The controller can control the opening or closing of the nitrogen valve to purge the coal injection branch pipe through the nitrogen input device. It should be noted that the stored nitrogen can be 1.6Mpa high-pressure nitrogen, which can ensure a better cooling and purging effect.

[0049] In summary, the blast furnace coal injection system provided by the embodiment of the present application includes a blowing main pipe, a pulverized coal distributor, a coal injection branch pipe, a spray gun, a controller, and a branch pipe coal valve, a pulverized coal flow meter, and a coal flow regulating valve sequentially arranged on each coal injection branch pipe. The pulverized coal is input into the blast furnace coal injection system through the input end of the blowing main pipe, the input end of the pulverized coal distributor is connected to the output end of the blowing main pipe, the output end of the pulverized coal distributor has a plurality of coal injection output ports, each coal injection output port is connected to a coal injection branch pipe, one end of the spray gun is connected to the output end of the coal injection branch pipe, and the other end of the spray gun is inserted into the blast furnace, and the controller is connected to each branch pipe coal valve, each pulverized coal flow meter, and each coal flow regulating valve. By setting a branch coal valve, a pulverized coal flow meter, a coal flow regulating valve and a controller, the branch coal injection rate of the branch coal valve which is currently in the open state is calculated by the controller, and according to the real-time coal injection rate and the branch coal injection rate obtained by the pulverized coal flow meter, the opening of the target coal flow regulating valve is adjusted until the real-time coal injection rate and the branch coal injection rate are consistent, so that an equal amount of pulverized coal can be distributed to each coal injection branch, thereby improving the stability of blast furnace operation.

[0050] Figure 2 : is a flow chart of a blast furnace coal injection method shown in an exemplary embodiment of the present application. The blast furnace coal injection method can be applied to the blast furnace coal injection system shown in any of the above embodiments, such as Figure 2 As shown, the exemplary blast furnace coal injection method may include:

[0051] Step S210, determining the number of working coal valves in all branch pipe coal valves according to the current state of each branch pipe coal valve.

[0052] In one embodiment of the present application, the number of working coal valves among all branch coal valves is determined according to the current state of each branch coal valve. The current state of the branch coal valve may be an open state or a closed state. If the current state of the branch coal valve is an open state, it can be determined that the branch coal valve is a working coal valve. According to this judgment method, all branch coal valves in the blast furnace coal injection system can be judged.

[0053] Step S220, determining the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the number of working coal valves.

[0054] In one embodiment of the present application, the branch pipe coal injection rate can be determined according to a preset blast furnace coal injection rate and the number of working coal valves.

[0055] Exemplarily, the preset blast furnace coal injection rate may be 30 t / h, the number of working coal valves may be 30, and the branch pipe coal injection rate may be 1 t / h.

[0056] Step S230, opening the target coal flow regulating valve and reading the real-time coal injection rate of the target pulverized coal flow meter.

[0057] In one embodiment of the present application, the target coal flow regulating valve can be opened and the real-time coal injection rate of the target coal powder flow meter can be read. The target coal flow regulating valve is the coal flow regulating valve located in the same coal injection branch pipe as the working coal valve. That is, all coal flow regulating valves located in the same coal injection branch pipe as the working coal valve need to be opened.

[0058] Step S240, adjusting the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate.

[0059] In one embodiment of the present application, the opening degree of the target coal flow regulating valve may be adjusted until the real-time coal injection rate is consistent with the branch pipe coal injection rate.

[0060] In one embodiment of the present application, in step S240, the process of adjusting the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate may include:

[0061] Step S241, if the real-time coal injection rate is less than the branch pipe coal injection rate when the first coal flow regulating valve is adjusted to the maximum opening, close the first working coal valve in the same coal injection branch pipe as the first coal flow regulating valve.

[0062] In one embodiment of the present application, if the real-time coal injection rate is less than the branch pipe coal injection rate when the first coal flow regulating valve is adjusted to the maximum opening, it can be determined that the coal injection branch pipe corresponding to the first coal flow regulating valve may be blocked. At this time, it is necessary to close the first working coal valve in the same coal injection branch pipe as the first coal flow regulating valve to avoid problems such as burning the gun.

[0063] Step S242, opening the first nitrogen valve to pass nitrogen to purge the coal injection branch pipe that closes the first working coal valve, the first nitrogen valve and the first working coal valve are located in the same coal injection branch pipe.

[0064] In one embodiment of the present application, the first nitrogen valve can be used to purge the coal injection branch pipe that closes the first working coal valve by introducing nitrogen. The introduction of nitrogen can cool the coal injection branch pipe. The branch pipe coal valve and the nitrogen valve are interlocked, and when one is closed at any time, the other is opened.

[0065] Step S243, closing the nitrogen valve after opening for a preset time.

[0066] In one embodiment of the present application, the nitrogen valve may be closed after the coal injection branch pipe is injected for a preset time.

[0067] Exemplarily, the preset time may be 5 minutes.

[0068] After executing step S241, steps S244 to S246 may also be executed.

[0069] Step S244, updating the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the current number of working coal valves.

[0070] In one embodiment of the present application, the branch pipe coal injection rate can be updated according to the preset blast furnace coal injection rate and the current number of working coal valves. That is, after closing one or more working coal valves, the number of current working coal valves decreases, and at this time, the current number of working coal valves needs to be determined to update the branch pipe coal injection rate.

[0071] Step S245, open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter.

[0072] In one embodiment of the present application, after the branch pipe coal injection rate is updated, the target coal flow regulating valve can be opened and the real-time coal injection rate of the target pulverized coal flow meter can be read.

[0073] Step S246, adjusting the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the updated branch pipe coal injection rate.

[0074] In one embodiment of the present application, the opening degree of the target coal flow regulating valve may be adjusted until the real-time coal injection rate is consistent with the updated branch pipe coal injection rate.

[0075] It should be noted that after the coal injection branch pipe is purged with nitrogen, the branch pipe coal valve on the coal injection branch pipe can be opened again, and the branch pipe coal injection rate can be updated again before adjusting the opening of the target coal flow regulating valve corresponding to each working coal valve.

[0076] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage method for storing one or more programs, when the one or more programs are executed by one or more processors, the electronic device implements the blast furnace coal injection system provided in the above-mentioned embodiments.

[0077] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0078] Another aspect of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the blast furnace coal injection system provided in each of the above embodiments. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist independently without being assembled into the electronic device.

[0079] Another aspect of the present application also provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the blast furnace coal injection system provided in each of the above embodiments.

[0080] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. "Including" and "comprising" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "including but not limited to".

[0081] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A blast furnace coal injection system, characterized in that: include: An injection pipe, through which the pulverized coal is input into the blast furnace coal injection system; The input end of the pulverized coal distributor is connected to the output end of the injection main pipe, and the output end of the pulverized coal distributor has a plurality of coal injection output ports; A coal injection branch pipe, each of the coal injection outlets is provided with a coal injection branch pipe, and each of the coal injection branch pipes is provided with a branch pipe coal valve, a coal powder flow meter and a coal flow regulating valve in sequence; A spray gun, one end of which is connected to the output end of the coal injection branch pipe, and the other end of which is inserted into the blast furnace; A controller, connected to each branch pipe coal valve, each pulverized coal flow meter and each coal flow regulating valve, is used to determine the number of working coal valves according to the current state of each branch pipe coal valve; and determine the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the number of the working coal valves; open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter; adjust the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate; Among them, the working coal valve is a branch coal valve whose current state is open, the target coal flow regulating valve is a coal flow regulating valve located in the same coal injection branch as the working coal valve, and the target coal powder flow meter is a coal powder flow meter located in the same coal injection branch as the working coal valve.

2. The blast furnace coal injection system according to claim 1, characterized in that: The lengths of each coal injection branch pipe are equal.

3. The blast furnace coal injection system according to claim 1, characterized in that: The blast furnace coal injection system also includes a nitrogen input branch connected to each of the coal injection branch pipes, wherein a nitrogen valve and a nitrogen input device are provided on the nitrogen input branch, nitrogen is stored in the nitrogen input device, and the nitrogen input branch is provided between the branch pipe coal valve and the coal powder flow meter.

4. A blast furnace coal injection method, applied to the blast furnace coal injection system according to claim 3, characterized in that: The blast furnace coal injection method comprises: According to the current state of each branch pipe coal valve, determine the number of working coal valves among all branch pipe coal valves; Determining the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the number of the working coal valves; Open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter; The opening of the target coal flow regulating valve is adjusted until the real-time coal injection rate is the same as the branch pipe coal injection rate.

5. The blast furnace coal injection method according to claim 1, characterized in that: Adjusting the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the branch pipe coal injection rate, including: If the real-time coal injection rate is less than the branch pipe coal injection rate when the first coal flow regulating valve is adjusted to the maximum opening, the first working coal valve in the same coal injection branch pipe as the first coal flow regulating valve is closed; Opening the first nitrogen valve to purge the coal injection branch pipe that closes the first working coal valve by introducing nitrogen, wherein the first nitrogen valve and the first working coal valve are located in the same coal injection branch pipe; The nitrogen valve is closed after being opened for a preset time.

6. The blast furnace coal injection method according to claim 5, characterized in that: After closing the first working coal valve located in the same coal injection branch pipe as the first coal flow regulating valve, the method further includes: updating the branch pipe coal injection rate according to the preset blast furnace coal injection rate and the current number of the working coal valves; Open the target coal flow regulating valve and read the real-time coal injection rate of the target pulverized coal flow meter; Adjust the opening of the target coal flow regulating valve until the real-time coal injection rate is consistent with the updated branch pipe coal injection rate.

7. An electronic device, characterized in that: The electronic device comprises: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the electronic device to implement the blast furnace coal injection method as described in any one of claims 4 to 6.

8. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor of a computer, the computer is caused to execute the blast furnace coal injection method according to any one of claims 4 to 6.

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