Automatic control method and device for multi-coal-line conveying of dry-powder coal gasifier

Abstract

The application provides a dry pulverized coal gasifier multi-pulverized coal line conveying automatic control method and device, which comprises the following steps: receiving various constraint conditions input on a DCS operation interface; collecting operation data of each coal preparation line and operation data of each gasifier; determining to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying according to the constraint conditions, the operation data of each coal preparation line and the operation data of each gasifier; if the single coal preparation line is started for pulverized coal conveying, a pre-set single coal preparation line conveying strategy is executed; if two or more coal preparation lines are started for pulverized coal conveying, a pre-set two or more coal preparation line conveying strategy is executed. Thus, the self-identification and selection of the coal preparation line can be realized, the pulverized coal conveying to the gasifier is fully automatically controlled, the human intervention is reduced, the timeliness and accuracy of the human judgment are avoided, and the safety of the pulverized coal conveying is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of automation control technology, specifically to an automatic control method and apparatus for conveying multiple coal powder lines in a dry pulverized coal gasification furnace. Background Technology

[0002] Coal gasification technology is a core link in the coal chemical industry chain. The main task of a coal chemical gasification unit is to use pressurized gasification technology to produce crude syngas from qualified coal powder from the coal powder preparation unit, which is then collected and sent to downstream units. The coal powder preparation unit, as the raw material supply unit for the coal powder gasification reaction, is responsible for grinding, drying, and sorting the raw coal from coal storage and transportation into qualified coal powder, which is then transported to the gasification unit via a pneumatic conveying system. The pretreatment and smooth, timely supply of coal powder for the gasification reaction directly determine the stability of the gasifier's load and the quality of the crude syngas, playing a crucial role in the safe and stable production control of the entire coal gasification process.

[0003] Currently, single-series pulverized coal conveying in coal chemical gasification plants can be completed using DCS (Distributed Control System) sequential control. However, multi-series pulverized coal conveying is almost entirely controlled manually due to factors such as the complexity of the control process, the rotation and maintenance between different series, changes in gasifier reaction load, pulverized coal storage space, and gasifier pulverized coal buffer space. This results in a low level of automation, a heavy reliance on human experience, difficulty in establishing control logic, and significantly increased risks and costs associated with gasifier operation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an automatic control method and apparatus for conveying multiple coal powder lines in a dry coal gasification furnace.

[0005] In a first aspect, embodiments of this application provide an automatic control method for conveying multiple pulverized coal lines in a dry pulverized coal gasification furnace, comprising:

[0006] It receives various constraints input on the DCS operation interface; the DCS is a distributed control system.

[0007] Collect operational data from each coal preparation line and each gasifier;

[0008] Based on the aforementioned constraints, the operating data of each coal preparation line, and the operating data of each gasifier, determine whether to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying.

[0009] If a single coal preparation line is started for coal powder transportation, the pre-set single coal preparation line transportation strategy will be executed.

[0010] If two or more coal preparation lines are started for pulverized coal transportation, the pre-set transportation strategy for two or more coal preparation lines will be executed.

[0011] Optionally, the constraints include: constraints for each coal preparation line and constraints for each gasifier; the constraints for the coal preparation line include: upper and lower limits of the coal preparation line material level; the constraints for the gasifier include: gasifier receiving conditions and upper limit of the gasifier material level.

[0012] Optionally, based on the aforementioned constraints, the operating data of each coal preparation line, and the operating data of each gasifier, it is determined whether to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying, including:

[0013] When only one gasifier is in operation and there are two or more coal preparation lines in operation, coal powder transportation can be carried out by selecting a single coal preparation line or two combined coal preparation lines, based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level.

[0014] When there are two or more gasifiers in operation and two or more coal preparation lines in operation, coal powder transportation is carried out by selecting a single coal preparation line or two combined coal preparation lines for each gasifier, based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level.

[0015] Optionally, the execution of a pre-set single coal preparation line conveying strategy includes:

[0016] From two or more coal preparation lines, select the optimal single coal preparation line for coal powder transportation based on the material level and material level deviation conditions of each coal preparation line.

[0017] When the first stopping condition is met, the coal preparation line is controlled to stop the conveying of pulverized coal, wherein the first stopping condition includes at least one of the following:

[0018] The level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier's material level.

[0019] A forced stop signal has been received;

[0020] The gasifier has reached the pressure relief condition.

[0021] Optionally, the implementation of a pre-set conveying strategy for two or more coal preparation lines includes:

[0022] For at least one gasifier, select two combined coal preparation lines for pulverized coal conveying;

[0023] In the two combined coal preparation lines, based on the material level of the coal preparation line and whether the coal preparation line is currently in standby status, the coal preparation line that is to be started first is determined to transport pulverized coal, and the timing starts when the coal preparation line is started.

[0024] If the level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier level before the switching time is reached, the coal preparation line will be controlled to stop pulverized coal delivery.

[0025] If the switching time is reached and the level of pulverized coal delivered to the gasifier is not higher than the upper limit of the gasifier level, then switch to another coal preparation line for pulverized coal delivery.

[0026] When the second stop condition is met, control another coal preparation line to stop coal powder conveying, wherein the second stop condition includes at least one of the following:

[0027] The level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier's material level.

[0028] A forced stop signal has been received;

[0029] The gasifier has reached the pressure relief condition.

[0030] Optionally, the method for determining the switching time includes at least one of the following:

[0031] The determination is based on the material level of the two selected combined coal preparation lines;

[0032] Determined based on the material level deviation of the two selected combined coal preparation lines;

[0033] The number of gasifiers to be handled is determined based on the number of coal preparation lines selected for the combined coal preparation line.

[0034] Optionally, the method further includes:

[0035] The coal powder conveying method is changed from conveying through a single coal preparation line to conveying through two combined coal preparation lines; or...

[0036] The coal powder transportation method was changed from transportation by two combined coal preparation lines to transportation by a single coal preparation line.

[0037] Secondly, embodiments of this application provide an automatic control device for conveying multiple coal powder lines in a dry coal gasification furnace, comprising:

[0038] The receiving module is used to receive various constraints input on the DCS operation interface; the DCS is a distributed control system.

[0039] The data acquisition module is used to collect operating data from each coal preparation line and each gasifier.

[0040] The pulverized coal conveying determination module is used to determine whether to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying based on the constraints, the operating data of each coal preparation line and the operating data of each gasifier.

[0041] The execution module is used to execute a pre-set single coal preparation line conveying strategy when starting a single coal preparation line for coal powder conveying; and to execute a pre-set two or more coal preparation line conveying strategy when starting two or more coal preparation lines for coal powder conveying.

[0042] Thirdly, embodiments of this application provide an automatic control device for conveying multiple pulverized coal lines in a dry pulverized coal gasification furnace, comprising: a processor and a memory, wherein the memory stores executable program instructions, and when the processor calls the program instructions in the memory, the processor is used to:

[0043] The steps of the automatic control method for conveying multiple coal powder lines in a dry coal gasifier as described in any one of the first aspects.

[0044] Fourthly, embodiments of this application provide a computer-readable storage medium for storing a program, which, when executed, implements the steps of the automatic control method for conveying multiple coal powder lines in a dry coal gasifier as described in any one of the first aspects.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] This application utilizes a distributed control system (DCS) to receive various constraints input on the DCS operation interface. The DCS collects operational data from each coal preparation line and each gasifier. Based on these constraints, the operational data from each coal preparation line, and the operational data from each gasifier, it determines whether to activate a single coal preparation line or two or more coal preparation lines for pulverized coal conveying. If a single coal preparation line is activated, a pre-set single-line conveying strategy is executed; if two or more coal preparation lines are activated, a pre-set two or more-line conveying strategy is executed. This allows for the determination of the optimal coal preparation line for pulverized coal conveying for each gasifier under numerous constraints, achieving autonomous identification and selection of coal preparation lines. Fully automated control of multiple coal preparation lines for pulverized coal conveying to the gasifier significantly reduces human intervention, avoids untimely and inaccurate human judgment, and significantly improves the safety of pulverized coal conveying. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort. Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0048] Figure 1 A flowchart illustrating an automatic control method for conveying multiple coal powder lines in a dry coal gasification furnace, provided in an embodiment of this application;

[0049] Figure 2 A flowchart of the main program for pulverized coal conveying provided in this application embodiment;

[0050] Figure 3 Control flow diagrams for various coal preparation lines provided in the embodiments of this application;

[0051] Figure 4 This is a control flowchart for pressure relief detection provided in an embodiment of this application. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] The technical solutions of the present invention and how they solve the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0057] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0058] Figure 1 This application provides a schematic flowchart of an automatic control method for multi-coal powder conveying in a dry coal gasification furnace, as illustrated in the embodiments below. Figure 1 As shown, the method in this embodiment may include the following steps:

[0059] Step S101: Receive the various constraints entered on the DCS operation interface.

[0060] The DCS is a distributed control system.

[0061] In this embodiment, before executing step S101, the program can be designed, written, optimized, and constrained using the APC-Studio 4.0 agile control software from Zhongkong Technology. Combined with an existing distributed control system (DCS), a DCS operation interface can be created. The DCS operation interface includes multiple manual input windows or controls to receive various constraints manually input. For example, users can set relevant parameters, the operating status of each pulverized coal preparation line, the operating status of each gasifier, the gasifier material level height, and the high and low limits of each prepared coal material level on the operation interface.

[0062] For example, the constraints include constraints for each coal preparation line and constraints for each gasifier; the constraints for the coal preparation line include upper and lower limits for the coal preparation line material level; the constraints for the gasifier include gasifier receiving conditions and upper limit conditions for the gasifier material level.

[0063] In this embodiment, the data acquisition and processing of the entire automatic control can be realized through the OPC communication protocol. Intermediate variables for data processing can be established on the DCS and the user operation interface can be drawn, which makes it convenient for the operator to input relevant parameters and view the optimized output results in a timely manner.

[0064] In this embodiment, the DCS can realize data storage and computation, constraint boundary enforcement, automation, and intelligent control. For example, by decomposing the entire large intelligent control and safety boundary problem into multiple different subsystem automatic control and constraint problems, and then using the control experience of on-site operation experts, the problem is solved step by step within the constraint boundary range. This not only considers the safety production boundary conditions but also achieves intelligent control, and ultimately enables the autonomous operation of pulverized coal conveying, thus obtaining the optimal safety production of the entire system.

[0065] Step S102: Collect the operating data of each coal preparation line and the operating data of each gasifier.

[0066] In this embodiment, the operational data of each coal preparation line may include: whether each coal preparation line is in operation or ready to operate, the number of gasifiers handled by each coal preparation line, etc. The operational data of each gasifier may include: whether each gasifier is in operation, whether each gasifier accepts coal preparation from a single coal preparation line or a combination of two coal preparation lines, etc.

[0067] Step S103: Based on the various constraints, the operating data of each coal preparation line and the operating data of each gasifier, determine whether to start a single coal preparation line or two or more coal preparation lines for pulverized coal transportation.

[0068] For example, when only one gasifier is in operation and there are two or more coal preparation lines in operation, coal powder transportation can be carried out by selecting a single coal preparation line or two combined coal preparation lines, based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level.

[0069] This embodiment addresses a many-to-one scenario, where there are multiple coal preparation lines and one gasifier. In this case, one coal preparation line can supply pulverized coal to the gasifier, or two combined coal preparation lines can alternately supply pulverized coal to the gasifier.

[0070] For example, when there are two or more gasifiers in operation and two or more coal preparation lines in operation, coal powder is transported by selecting a single coal preparation line or two combined coal preparation lines for each gasifier, based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level.

[0071] In this embodiment, a many-to-many scenario is addressed, where two or more gasifiers are in operation, requiring control of multiple coal preparation lines to supply pulverized coal to each gasifier. In this embodiment, one coal preparation line can supply pulverized coal to one gasifier or simultaneously to two or more gasifiers. A gasifier can receive pulverized coal from one coal preparation line or from two or more coal preparation lines.

[0072] Step S104: If the single coal preparation line is started for coal powder transportation, the pre-set single coal preparation line transportation strategy is executed.

[0073] For example, from two or more coal preparation lines, an optimal single coal preparation line is selected for pulverized coal conveying based on the material level and material level deviation conditions of each coal preparation line; when a first stop condition is met, the coal preparation line is controlled to stop conveying pulverized coal, wherein the first stop condition includes at least one of the following:

[0074] The level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier's material level.

[0075] A forced stop signal has been received;

[0076] The gasifier has reached the pressure relief condition.

[0077] In this embodiment, agile control software can be used to design and write pulverized coal conveying start-up and stop programs, and each coal preparation line can be controlled according to the designed and written pulverized coal conveying main program, reset, forced stop program, etc.

[0078] Step S105: If two or more coal preparation lines are started for coal powder transportation, the pre-set transportation strategy for two or more coal preparation lines shall be executed.

[0079] For example, two combined coal preparation lines are selected for coal powder transportation for at least one gasifier. Among the two combined coal preparation lines, based on the coal preparation line level and whether the line is currently in standby mode, one coal preparation line is prioritized for coal powder transportation, and a timer is started when the coal preparation line is started. If the coal powder level delivered to the gasifier is higher than the upper limit of the gasifier's level before the switching time is reached, the coal preparation line is controlled to stop coal powder transportation. If the switching time is reached and the coal powder level delivered to the gasifier is not higher than the upper limit of the gasifier's level, the other coal preparation line is switched to coal powder transportation. When a second stop condition is met, the other coal preparation line is controlled to stop coal powder transportation, wherein the second stop condition includes at least one of the following:

[0080] The level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier's material level.

[0081] A forced stop signal has been received;

[0082] The gasifier has reached the pressure relief condition.

[0083] In this embodiment, the method for determining the switching time includes at least one of the following:

[0084] The determination is based on the material level of the two selected combined coal preparation lines;

[0085] Determined based on the material level deviation of the two selected combined coal preparation lines;

[0086] The number of gasifiers to be handled is determined based on the number of coal preparation lines selected for the combined coal preparation line.

[0087] In one possible implementation, the coal preparation line with the higher material level can be selected first among the two combined coal preparation lines to supply pulverized coal to the gasifier. When the material level of the coal preparation line is lower than that of the other coal preparation line, the switching time is determined.

[0088] In another possible implementation, the coal preparation line with the higher material level can be selected first among the two combined coal preparation lines to supply pulverized coal to the gasifier. When the material level of the coal preparation line is lower than that of the other coal preparation line, and the material levels of the two reach a preset deviation, the switching time is determined.

[0089] In another possible implementation, the coal preparation line responsible for the fewer gasifiers can be selected first among the two combined coal preparation lines to supply pulverized coal to the gasifiers. When the number of gasifiers handled by the other coal preparation line decreases, the switching time is determined.

[0090] It should be noted that, in addition to the above methods and steps, the coal powder conveying method can be changed from conveying through a single coal preparation line to conveying through two combined coal preparation lines, or the coal powder conveying method can be changed from conveying through two combined coal preparation lines to conveying through a single coal preparation line, as needed.

[0091] In this embodiment, various constraints are received from the DCS (Distributed Control System) operating interface. The DCS collects operational data from each coal preparation line and each gasifier. Based on these constraints, the operational data from each coal preparation line, and the operational data from each gasifier, it determines whether to activate a single coal preparation line or two or more coal preparation lines for pulverized coal conveying. If a single coal preparation line is activated, a pre-set single-line conveying strategy is executed; if two or more coal preparation lines are activated, a pre-set two or more-line conveying strategy is executed. This allows for the determination of the optimal coal preparation line for pulverized coal conveying for each gasifier under numerous constraints, achieving autonomous identification and selection of coal preparation lines. Fully automated control of multiple coal preparation lines for pulverized coal conveying to the gasifier significantly reduces human intervention, avoids untimely and inaccurate human judgment, and significantly improves the safety of pulverized coal conveying.

[0092] For example, the APC-Studio 4.0 agile control software from ZKTeco provides high scalability and graphical configuration, combining expert control and graphical interface to achieve intelligent control of multiple series of pulverized coal conveying in a dry pulverized coal gasifier. Each gasifier serves as a program carrier; therefore, multiple pulverized coal conveying programs can be combined to form a multi-series automatic control program for pulverized coal conveying. For example... Figure 2 The flowchart shown is for the main program of pulverized coal conveying. After the user inputs the remainders of each series of coal preparation, the constraints of each series of gasifiers, and other constraints, the program is started after real-time collection of operating data of each series of coal receiving, operating data of each series of gasifiers, and communication data. The specific execution steps are as follows:

[0093] Step a: After the program runs, the first stage enters the preparation stage. The automatic control of coal powder conveying for a single gasifier is started. Based on the material receiving conditions required by the gasifier, the optional coal preparation line, the material level of the optional coal preparation line, the material level deviation of the coal preparation line, and other conditions, the program selects the optimal single coal preparation line or a combination of two coal preparation lines and starts the coal powder conveying execution program.

[0094] Step b: Select a single standby coal line. The coal powder conveying program starts the single standby coal line to convey coal powder. When the coal powder is conveyed to the gasifier high level, the coal powder conveying will automatically stop and the program will return. When a forced stop signal is received, the coal powder conveying will automatically stop and the program will return. When the gasifier depressurization condition is met, the coal powder conveying will automatically stop and the program will return.

[0095] Step c: Select two coal preparation lines for combined pulverized coal conveying. The pulverized coal conveying program starts the priority coal preparation line based on factors such as material level and whether it is in standby mode. After the switching time is reached, it switches to the next coal preparation line. The switching time is automatically set by the program based on factors such as the material level of the two selected coal preparation lines, the material level deviation of multiple coal preparation lines responsible for this gasifier, and the number of gasifiers that multiple coal preparation lines need to be responsible for. When the pulverized coal is conveyed to the gasifier's high material level, the pulverized coal conveying automatically stops. If a single coal preparation line has met the gasifier's high material level within the switching time, the pulverized coal conveying stops, and the program returns. If a single coal preparation line has not met the gasifier's high material level within the switching time, the current coal preparation line stops, and a new coal preparation line starts to continue conveying pulverized coal until the gasifier's high material level is met, and the program returns. When a forced stop signal is received, the pulverized coal conveying automatically stops, and the program returns. When the gasifier's depressurization condition is met, the pulverized coal conveying automatically stops, and the program returns.

[0096] Step d: Determine if a stop signal has been received. If yes, end the process; otherwise, return to steps a to c.

[0097] In this embodiment, automatic and intelligent control of pulverized coal conveying for multiple gasifiers can be achieved.

[0098] For example, in the above Figure 1 , Figure 2 In the method embodiment shown, the control flow for each coal preparation line is as follows: Figure 3 As shown, in Figure 3 First, a pre-start procedure check is performed via the start / reset process, then the pipeline valve is opened. If a pause signal is received, the sequential pump is started / paused. If a stop signal is received, the sequential pump is stopped. Finally, the pipeline valve is closed.

[0099] For example, in the above Figure 1 , Figure 2 In the method embodiment shown, the control flow for pressure relief detection is as follows: Figure 4 As shown, in Figure 4 First, real-time pressure data of the gasifier is collected to determine whether the pressure relief valve should be opened. If the pressure relief valve is opened, a pressure relief signal is fed back. When the pressure of the gasifier is lower than the preset value, the pressure relief ends.

[0100] This embodiment utilizes APC-Studio 4.0 agile control software to achieve autonomous identification and selection of pulverized coal lines, realizing full automation of pulverized coal delivery to the gasifier from multiple pulverized coal lines. This significantly reduces the intensity of human operation, the untimely and inaccurate nature of human judgment, and enables autonomous operation. By considering the safety production boundaries during pulverized coal delivery, the full automation of pulverized coal delivery to the gasifier from multiple pulverized coal lines reduces the uncertainty of human operation and improves the safety of pulverized coal delivery.

[0101] Furthermore, this application embodiment also provides an automatic control device for conveying multiple coal powder lines in a dry coal gasifier, comprising: a receiving module for receiving various constraints input on a DCS operation interface; wherein the DCS is a distributed control system; a data acquisition module for acquiring operating data of each coal preparation line and operating data of each gasifier; a coal powder conveying determination module for determining whether to start a single coal preparation line or two or more coal preparation lines for coal powder conveying based on the constraints, the operating data of each coal preparation line, and the operating data of each gasifier; and an execution module for executing a pre-set single coal preparation line conveying strategy when starting a single coal preparation line for coal powder conveying, and executing a pre-set two or more coal preparation line conveying strategy when starting two or more coal preparation lines for coal powder conveying.

[0102] The apparatus in this embodiment can be used to perform the above-described... Figure 1 , Figure 2 The steps in the method embodiments shown will not be repeated here.

[0103] It should be noted that those skilled in the art will understand that various aspects of the present invention can be implemented as systems, methods, or program products. Therefore, various aspects of the present invention can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as a "circuit," "module," or "platform."

[0104] Furthermore, embodiments of this application also provide a computer-readable storage medium storing computer-executable instructions. When at least one processor of a user device executes these computer-executable instructions, the user device performs the various possible methods described above. The computer-readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes any medium that facilitates the transfer of a computer program from one location to another. The storage medium can be any available medium accessible to a general-purpose or special-purpose computer. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Additionally, the ASIC can reside in the user device. Alternatively, the processor and storage medium can exist as discrete components in a communication device.

[0105] This application also provides a program product including a computer program stored in a readable storage medium. At least one processor of the server can read the computer program from the readable storage medium, and the at least one processor executes the computer program to cause the server to implement any of the methods described in the embodiments of the present invention.

[0106] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0107] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. An automatic control method for conveying multiple pulverized coal lines in a dry pulverized coal gasification furnace, characterized in that, include: Receive various constraints input on the DCS operation interface; The DCS is a distributed control system. Collect operational data from each coal preparation line and each gasifier; Based on the aforementioned constraints, the operating data of each coal preparation line, and the operating data of each gasifier, it is determined whether to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying. When only one gasifier is in operation and there are two or more operating coal preparation lines, based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level, a single coal preparation line or two combined coal preparation lines are selected for pulverized coal conveying. When two or more gasifiers are in operation and there are two or more operating coal preparation lines, based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level, a single coal preparation line or two combined coal preparation lines are selected for pulverized coal conveying for each gasifier. If a single coal preparation line is started for coal powder transportation, the pre-set single coal preparation line transportation strategy will be executed. If two or more coal preparation lines are started for pulverized coal transportation, the pre-set transportation strategy for two or more coal preparation lines will be executed.

2. The automatic control method for multi-coal powder conveying in a dry coal gasification furnace according to claim 1, characterized in that, The constraints include: constraints for each coal preparation line and constraints for each gasifier; the constraints for the coal preparation line include: upper and lower limits of the coal preparation line material level; the constraints for the gasifier include: gasifier material receiving conditions and upper limit of the gasifier material level.

3. The automatic control method for multi-coal powder conveying in a dry pulverized coal gasification furnace according to claim 1 or 2, characterized in that, The execution of the pre-set single coal preparation line conveying strategy includes: From two or more coal preparation lines, select the optimal single coal preparation line for coal powder transportation based on the material level and material level deviation conditions of each coal preparation line. When the first stopping condition is met, the coal preparation line is controlled to stop the conveying of pulverized coal, wherein the first stopping condition includes at least one of the following: The level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier's material level. A forced stop signal has been received; The gasifier has reached the pressure relief condition.

4. The automatic control method for multi-coal powder conveying in a dry coal gasification furnace according to claim 1 or 2, characterized in that, The implementation of a pre-set conveying strategy for two or more coal preparation lines includes: For at least one gasifier, select two combined coal preparation lines for pulverized coal conveying; In the two combined coal preparation lines, based on the material level of the coal preparation line and whether the coal preparation line is currently in standby status, the coal preparation line that is to be started first is determined to transport pulverized coal, and the timing starts when the coal preparation line is started. If the level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier level before the switching time is reached, the coal preparation line will be controlled to stop pulverized coal delivery. If the switching time is reached and the level of pulverized coal delivered to the gasifier is not higher than the upper limit of the gasifier's level, then switch to another coal preparation line for pulverized coal delivery. When the second stop condition is met, control another coal preparation line to stop coal powder conveying, wherein the second stop condition includes at least one of the following: The level of pulverized coal delivered to the gasifier is higher than the upper limit of the gasifier's material level. A forced stop signal has been received; The gasifier has reached the pressure relief condition.

5. The automatic control method for multi-coal powder conveying in a dry coal gasification furnace according to claim 4, characterized in that, The method for determining the switching time includes at least one of the following: The determination is based on the material level of the two selected combined coal preparation lines; Determined based on the material level deviation of the two selected combined coal preparation lines; The number of gasifiers to be handled is determined based on the number of coal preparation lines selected for the combined coal preparation line.

6. The automatic control method for multi-coal powder conveying in a dry coal gasification furnace according to claim 1, characterized in that, The method further includes: The coal powder conveying method is changed from conveying through a single coal preparation line to conveying through two combined coal preparation lines; or... The coal powder transportation method was changed from transportation by two combined coal preparation lines to transportation by a single coal preparation line.

7. An automatic control device for conveying multiple coal powder lines in a dry coal gasification furnace, characterized in that, include: The receiving module is used to receive various constraints input on the DCS operation interface; The DCS is a distributed control system. The data acquisition module is used to collect operating data from each coal preparation line and each gasifier. The pulverized coal conveying determination module is used to determine whether to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying based on the aforementioned constraints, the operating data of each coal preparation line, and the operating data of each gasifier. When only one gasifier is in operation and there are two or more operating coal preparation lines, the module selects either a single coal preparation line or two combined coal preparation lines for pulverized coal conveying based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level. When two or more gasifiers are in operation and there are two or more operating coal preparation lines, the module selects either a single coal preparation line or two combined coal preparation lines for pulverized coal conveying for each gasifier based on the gasifier's receiving conditions, the upper limit of the gasifier's material level, and the upper and lower limits of the coal preparation line's material level. The execution module is used to execute a pre-set single coal preparation line conveying strategy when starting a single coal preparation line for coal powder conveying; and to execute a pre-set two or more coal preparation line conveying strategy when starting two or more coal preparation lines for coal powder conveying.

8. An automatic control device for conveying multiple coal powder lines in a dry coal gasification furnace, characterized in that, include: A processor and a memory, wherein the memory stores executable program instructions, and when the processor invokes the program instructions in the memory, the processor is used to: The steps of the automatic control method for conveying multiple coal powder lines in a dry pulverized coal gasifier as described in any one of claims 1 to 6.

9. A computer-readable storage medium for storing a program, characterized in that, When the program is executed, it implements the steps of the automatic control method for multi-coal powder conveying in a dry pulverized coal gasifier as described in any one of claims 1 to 6.

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