Water balance control method and device of gasification furnace, electronic equipment and storage medium

Abstract

The invention discloses a water balance control method and device for a gasification furnace, electronic equipment and a storage medium. The method comprises the steps that multiple monitoring parameters of a dry pulverized coal gasification device where a gasification furnace to be subjected to water balance control is located are obtained, and the multiple monitoring parameters at least comprise liquid level parameters, air pressure parameters, temperature parameters and liquid flow parameters of different positions in the dry pulverized coal gasification device; based on the plurality of monitoring parameters, constructing a coupling association relationship of the dry pulverized coal gasification device, the coupling association relationship being used for representing an association relationship that needs to be satisfied among the plurality of monitoring parameters when the dry pulverized coal gasification device is in a preset normal operation condition; the water balance of the gasification furnace is controlled based on the coupling incidence relation, a water balance control result is obtained, and the water balance control result is used for representing that the synthesis gas water carrying amount in the gasification furnace is within a preset water carrying amount interval. According to the invention, the technical problem of low efficiency of water balance control of the gasification furnace in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of dry coal powder gasifier control, and in particular to a water balance control method, device, electronic equipment and storage medium of a gasifier. Background Art

[0002] During the gasification process of dry coal powder, by adjusting the water vapor content and water-coal ratio inside the gasifier, that is, controlling the water balance of the gasifier, the optimal conditions for the gasification reaction can be achieved during the gasification process, thereby improving the gasification efficiency and gas production quality, which is of great significance for improving the operating stability and economic benefits of the gasifier.

[0003] At present, in the related technology, the control of the water balance of the gasifier usually requires the relevant technical personnel to rely on the expert experience, and the control process is easily affected by human factors; or the various parameters involved in the water balance in the pulverized coal gasification device are controlled within a given indicator range, and the control process between the various parameters is prone to mutual interference or influence, resulting in the difficulty in accurately controlling the water balance, and prone to abnormal conditions such as clogging of the synthesis gas pipeline or clogging of the synthesis gas washing tower tray, that is, the efficiency of the water balance control of the gasifier is low.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a water balance control method, device, electronic device and storage medium for a gasifier, so as to at least solve the technical problem of low efficiency of water balance control for a gasifier in the related art.

[0006] According to one aspect of an embodiment of the present invention, a method for water balance control of a gasifier is provided, comprising: obtaining multiple monitoring parameters of a dry coal powder gasification device in which the gasifier to be subjected to water balance control is located, wherein the multiple monitoring parameters include at least liquid level parameters, air pressure parameters, temperature parameters and liquid flow parameters at different positions in the dry coal powder gasification device; constructing a coupling association relationship of the dry coal powder gasification device based on the multiple monitoring parameters, wherein the coupling association relationship is used to represent the association relationship that needs to be satisfied between the multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; controlling the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result, wherein the water balance control result is used to characterize that the water content of the synthesis gas in the gasifier is within a preset water content range.

[0007] Optionally, the coupling association relationship includes at least a first coupling relationship between a target flow parameter in the liquid flow parameter and the water content of the synthesis gas; the water balance of the gasifier is controlled based on the coupling association relationship to obtain a water balance control result, including: controlling the angle valve opening of the flash angle valve in the dry pulverized coal gasification device based on the target flow parameter to control the water content of the synthesis gas to be within a preset water content range, and obtaining a water balance control result, wherein the target flow parameter is used to characterize the black water flow from the gasifier to the black water flash system.

[0008] Optionally, the coupling association relationship also includes a second coupling relationship between the operating conditions of the gasifier and other flow parameters in the liquid flow parameters; before the step of controlling the angle valve opening of the flash angle valve in the dry pulverized coal gasification device based on the target flow parameter, the method also includes: based on the operating conditions, controlling other flow parameters to be within the corresponding preset flow range, wherein other flow parameters are used to characterize other flows in the liquid flow parameters except the target flow parameters, and other flow parameters include at least one of the following: a first flow, a second flow, a third flow, a fourth flow, a fifth flow and a sixth flow, the first flow is used to represent the Venturi washing water flow, the second flow is used to represent the upper tray washing water flow of the synthesis gas washing tower, the third flow is used to represent the tray washing water flow in the synthesis gas washing tower, the fourth flow is used to represent the tower kettle replenishment flow of the synthesis gas washing tower, the fifth flow is used to represent the quenching circulating water flow, and the sixth flow is used to represent the ash water flow at the bottom of the synthesis gas washing tower.

[0009] Optionally, the coupling association relationship also includes a third coupling relationship between the target flow parameter and the first liquid level in the liquid level parameter; based on the operating conditions, before the step of controlling other flow parameters to be within the corresponding preset flow range, the method also includes: controlling the angle valve opening of the flash angle valve based on the target flow parameter to control the first liquid level to be within the preset liquid level range, wherein the first liquid level is used to indicate the liquid level in the quenching chamber of the gasifier.

[0010] Optionally, the coupling association relationship also includes a fourth coupling relationship between other flow parameters and a fourth flow; after the step of controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device based on the target flow parameter, the method also includes: in response to changes in the flow of other flow parameters, obtaining the flow change of other flow parameters; based on the flow change, performing flow compensation on the fourth flow to obtain a horizontal balance control result.

[0011] Optionally, the method also includes: determining the sum of the first flow rate, the second flow rate, the third flow rate, the fourth flow rate and the preset synthesis gas condensate to obtain a first sum value; determining the sum of the fifth flow rate and the sixth flow rate to obtain a second sum value; and determining the amount of water in the synthesis gas based on the difference between the first sum value and the second sum value.

[0012] According to another aspect of an embodiment of the present invention, a water balance control device for a gasifier is provided, comprising: an acquisition module, used to acquire multiple monitoring parameters of a dry coal powder gasification device in which the gasifier to be subjected to water balance control is located, wherein the multiple monitoring parameters include at least liquid level parameters, air pressure parameters, temperature parameters and liquid flow parameters at different positions in the dry coal powder gasification device; a construction module, used to construct a coupling association relationship of the dry coal powder gasification device based on the multiple monitoring parameters, wherein the coupling association relationship is used to represent the association relationship that needs to be satisfied between the multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; a control module, used to control the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result, wherein the water balance control result is used to characterize that the water content of the synthesis gas in the gasifier is within a preset water content range.

[0013] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0015] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0016] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0017] According to another aspect of the embodiments of the present invention, a computer program is further provided. When the computer program is executed by a processor, the methods in the embodiments of the present invention are implemented.

[0018] In an embodiment of the present invention, a water balance control method for a gasifier is provided, comprising: obtaining multiple monitoring parameters of a dry coal powder gasification device in which a gasifier to be subjected to water balance control is located, wherein the multiple monitoring parameters at least include liquid level parameters, air pressure parameters, temperature parameters and liquid flow parameters at different positions in the dry coal powder gasification device; constructing a coupling association relationship of the dry coal powder gasification device based on the multiple monitoring parameters, wherein the coupling association relationship is used to indicate the association relationship that needs to be satisfied between the multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; controlling the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result, wherein the water balance control result is used to characterize that the amount of water in the syngas in the gasifier is within a preset water amount range. It is easy to notice that the technical solution proposed in the present application can comprehensively consider the association relationship between multiple monitoring parameters, construct a more accurate coupling association relationship, monitor and control each parameter in real time during the operation of the gasifier, thereby realizing accurate control of the water balance state of the gasifier. By analyzing the association relationship between the monitoring parameters, the operating parameters of the gasifier can be optimized, the energy efficiency and production capacity of the equipment can be improved, and the operating efficiency and stability of the gasifier can be improved. Through real-time monitoring and control, the gasifier is kept in a water balance state, reducing equipment failures and downtime caused by water balance imbalance, thereby solving the technical problem of low efficiency in water balance control of the gasifier in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a flow chart of a water balance control method for a gasifier according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of an optional dry pulverized coal gasification device according to an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of a water balance control device for a gasifier according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] According to one aspect of an embodiment of the present invention, a water balance control method for a gasifier is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0026] Figure 1 is a flow chart of a water balance control method for a gasifier according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0027] Step S102, obtaining a plurality of monitoring parameters of a dry coal powder gasification device in which a gasifier to be subjected to water balance control is located.

[0028] The multiple monitoring parameters include at least liquid level parameters, gas pressure parameters, temperature parameters and liquid flow parameters at different locations in the dry coal powder gasification device.

[0029] The above-mentioned dry coal powder gasification device may refer to a device for converting coal powder into synthesis gas. In the dry coal powder gasification device, coal powder can be fed into a gasifier, and a gasification reaction occurs in a high temperature and oxygen-deficient environment to generate synthesis gas. The synthesis gas can be mainly composed of carbon monoxide and hydrogen, which can be used as a fuel or chemical raw material. It can effectively utilize resources such as coal, reduce environmental pollution, and promote the development of clean energy. The dry coal powder gasification device in this application may include a gasifier, a venturi scrubber, a venturi gas-liquid separation tank, a synthesis gas washing tower, a quenching circulating water pump, a flash angle valve, and a black water flash device. The specific results of the dry coal powder gasification device can be set according to actual needs and are not limited here.

[0030] In an optional embodiment, multiple monitoring parameters of the dry coal powder gasification device where the gasifier to be controlled for water balance is located can be obtained. Specifically, for liquid level parameter monitoring, a liquid level sensor can be installed in the dry coal powder gasification device, and the liquid level parameters at different positions can be monitored in real time. The liquid level sensor converts the liquid level height into an electrical signal, which is transmitted to the control system for processing through a data acquisition system. For air pressure parameter monitoring, air pressure sensors can be installed at different positions inside the gasification device to monitor air pressure parameters in real time. The air pressure sensor converts the air pressure value into an electrical signal, which is transmitted to the control system for processing through a data acquisition system. For temperature parameter monitoring, temperature sensors can be placed at different positions inside the gasification device to monitor temperature parameters in real time. The temperature sensor converts the temperature value into an electrical signal, which is transmitted to the control system for processing through a data acquisition system. For liquid flow parameter monitoring, a flow meter can be installed on a liquid pipeline to monitor liquid flow parameters in real time. The flow meter converts the flow value into an electrical signal, which is transmitted to the control system for processing through a data acquisition system. The above monitoring parameters can be collected and transmitted to the control system in real time through a data acquisition system. The control system can analyze and process these monitoring parameters, thereby realizing the control of the water balance of the gasifier. Real-time monitoring of multiple key parameters helps to improve the understanding and control capabilities of the gasification unit; through analysis of the monitoring parameters, the state of the gasifier can be judged more accurately, the control strategy can be adjusted in time, production efficiency and safety can be improved, and data support and basis can be provided for subsequent water balance control of the gasifier.

[0031] Step S104: constructing a coupling association relationship of the dry coal powder gasification device based on multiple monitoring parameters.

[0032] The coupling association relationship is used to indicate the association relationship that needs to be satisfied between multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition.

[0033] In an optional embodiment, a coupling correlation relationship of a dry coal powder gasification device can be constructed based on multiple monitoring parameters. Specifically, key parameters for monitoring the operating state of the gasification device, such as temperature, pressure, flow rate, chemical composition, etc., can be determined. Then, based on the process characteristics and control requirements of the gasification device, a mathematical model can be established to describe the relationship between the various monitoring parameters, and a physical model, a statistical model, or a machine learning model can be used. According to the model analysis, the coupling correlation relationship between different monitoring parameters can be determined, that is, the relationship that should be satisfied between these parameters under normal operating conditions, such as the correlation relationship between temperature and pressure, the correlation relationship between the gasification agent flow rate and the gasification product flow rate, etc. Finally, a monitoring system can be designed according to the coupling correlation relationship, including a sensor, a data acquisition system, and a monitoring system, for real-time monitoring of the values ​​of each parameter and timely detection of abnormal conditions. Through the above steps, the coupling correlation relationship between multiple monitoring parameters of the dry coal powder gasification device can be realized, so that the operating state of the gasification device can be better monitored and controlled, problems can be discovered and handled in a timely manner, and the stability and reliability of the equipment can be improved. By establishing a coupling correlation relationship, intelligent monitoring of the gasification device can be realized, abnormal conditions can be discovered in a timely manner, and corresponding measures can be taken to improve production efficiency. By analyzing the correlation between the monitoring parameters, the operating parameters of the gasification device can be optimized, the energy efficiency and production capacity of the equipment can be improved, and the operating efficiency and stability of the gasification device can be improved.

[0034] Step S106, controlling the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result.

[0035] The water balance control result is used to indicate that the water content of the synthesis gas in the gasifier is within a preset water content range.

[0036] The above-mentioned preset water volume interval may refer to a pre-set appropriate water volume interval. The preset water volume interval may be determined according to actual needs and is not limited here.

[0037] In an optional embodiment, a preset interval of the amount of water in the synthesis gas, that is, a target range of the water balance control result, can be set according to actual conditions. Then, according to the coupling association model, the real-time gasifier parameters can be monitored, and the operating parameters can be adjusted in real time through the control system so that the amount of water in the synthesis gas in the gasifier is always kept within the preset water range. Through the above steps, effective control of the water balance of the gasifier can be achieved to ensure the normal operation and production efficiency of the gasifier. Through real-time monitoring and control, the gasifier is kept in a water balance state, reducing equipment failures and downtime caused by water balance imbalance. The water balance control result can ensure that the amount of water in the synthesis gas is within a suitable range, thereby improving the quality of the synthesis gas, reducing the impurity content in the gas, and improving the utilization value. Optimizing water balance control can effectively reduce energy consumption and raw material consumption, reduce production costs, improve economic benefits, and improve the operating efficiency and output quality of the gasifier.

[0038] In an embodiment of the present invention, a water balance control method for a gasifier is provided, comprising: obtaining multiple monitoring parameters of a dry coal powder gasification device in which a gasifier to be subjected to water balance control is located, wherein the multiple monitoring parameters at least include liquid level parameters, air pressure parameters, temperature parameters and liquid flow parameters at different positions in the dry coal powder gasification device; constructing a coupling association relationship of the dry coal powder gasification device based on the multiple monitoring parameters, wherein the coupling association relationship is used to indicate the association relationship that needs to be satisfied between the multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; controlling the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result, wherein the water balance control result is used to characterize that the amount of water in the syngas in the gasifier is within a preset water amount range. It is easy to notice that the technical solution proposed in the present application can comprehensively consider the association relationship between multiple monitoring parameters, construct a more accurate coupling association relationship, monitor and control each parameter in real time during the operation of the gasifier, thereby realizing accurate control of the water balance state of the gasifier. By analyzing the association relationship between the monitoring parameters, the operating parameters of the gasifier can be optimized, the energy efficiency and production capacity of the equipment can be improved, and the operating efficiency and stability of the gasifier can be improved. Through real-time monitoring and control, the gasifier is kept in a water balance state, reducing equipment failures and downtime caused by water balance imbalance, thereby solving the technical problem of low efficiency in water balance control of the gasifier in related technologies.

[0039] Optionally, the coupling association relationship includes at least a first coupling relationship between a target flow parameter in the liquid flow parameter and the water content of the synthesis gas; the water balance of the gasifier is controlled based on the coupling association relationship to obtain a water balance control result, including: controlling the angle valve opening of the flash angle valve in the dry pulverized coal gasification device based on the target flow parameter to control the water content of the synthesis gas to be within a preset water content range, and obtaining a water balance control result, wherein the target flow parameter is used to characterize the black water flow from the gasifier to the black water flash system.

[0040] The above-mentioned flash angle valve may refer to a device used in a gasifier to control the flow of a gas and liquid mixture produced by a gasification reaction. In a dry pulverized coal gasification device, the flash angle valve may be installed at the bottom or side of the gasifier to adjust the flow speed and direction of the gas and liquid mixture during the gasification process. During the gasification process, the gas and liquid mixture produced by the gasification reaction needs to be controlled by a flash angle valve to ensure that its flow direction and speed in the gasifier meet the process requirements. The flash angle valve can effectively control the flow of the gas and liquid mixture in the gasifier by adjusting the flash angle, thereby ensuring the stable operation of the gasification process. The flash angle valve can also adjust the flash angle in time according to the flow and pressure changes of the gas and liquid mixture produced by the gasification reaction to adapt to different working conditions and operating requirements in the gasification process, thereby ensuring the safe and stable operation of the gasifier.

[0041] In an optional embodiment, the coupling association relationship includes at least a first coupling relationship between a target flow parameter in the liquid flow parameter and the amount of water in the syngas, that is, the association relationship between the target flow parameter and the amount of water in the syngas can be set, and the change of the amount of water in the syngas can be affected by controlling the target flow parameter. Specifically, first, the amount of water in the syngas in the gasifier can be monitored in real time by a sensor to obtain actual water content data, and a preset water content interval can be set to determine that the amount of water in the syngas should be within the interval. Then, the angle valve opening of the flash angle valve in the dry coal powder gasification device can be controlled according to the target flow parameter. By controlling the opening of the angle valve, the black water flow of the flash system in the gasifier can be adjusted, thereby affecting the amount of water in the syngas. The angle valve opening of the flash angle valve can be adjusted according to the real-time monitored syngas water content data and the preset water content interval, so that the amount of water in the syngas is within the preset interval. After a series of control adjustments, the water balance control result can be obtained, so that the water balance in the gasifier is effectively controlled. Through the above steps, the water balance of the gasifier can be effectively controlled, ensuring that the amount of water in the synthesis gas is within an appropriate range, and improving the operating efficiency and stability of the gasifier. At the same time, through the control method of coupling correlation, the water balance of the gasifier can be more accurately controlled, energy consumption can be reduced, production efficiency can be improved, and production costs can be reduced.

[0042] Optionally, the coupling association relationship also includes a second coupling relationship between the operating conditions of the gasifier and other flow parameters in the liquid flow parameters; before the step of controlling the angle valve opening of the flash angle valve in the dry pulverized coal gasification device based on the target flow parameter, the method also includes: based on the operating conditions, controlling other flow parameters to be within the corresponding preset flow range, wherein other flow parameters are used to characterize other flows in the liquid flow parameters except the target flow parameters, and other flow parameters include at least one of the following: a first flow, a second flow, a third flow, a fourth flow, a fifth flow and a sixth flow, the first flow is used to represent the Venturi washing water flow, the second flow is used to represent the upper tray washing water flow of the synthesis gas washing tower, the third flow is used to represent the tray washing water flow in the synthesis gas washing tower, the fourth flow is used to represent the tower kettle replenishment flow of the synthesis gas washing tower, the fifth flow is used to represent the quenching circulating water flow, and the sixth flow is used to represent the ash water flow at the bottom of the synthesis gas washing tower.

[0043] The above-mentioned preset flow range may refer to a preset appropriate flow control range. Different flow parameters may correspond to different flow parameters, which may be determined according to actual needs and are not limited here.

[0044] In an optional embodiment, before controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device, the second coupling relationship between the operating conditions of the gasifier and the liquid flow parameter can also be considered. Specifically, first, by monitoring and analyzing the operating conditions, it can be determined that other flow parameters are within the corresponding preset flow interval. Other flow parameters may include at least one of the following: a first flow, a second flow, a third flow, a fourth flow, a fifth flow, and a sixth flow, wherein the first flow represents the venturi washing water flow, the second flow represents the washing water flow of the upper tray of the synthesis gas washing tower, the third flow represents the washing water flow of the tray in the synthesis gas washing tower, the fourth flow represents the liquid replenishment flow of the kettle of the synthesis gas washing tower, the fifth flow represents the quenching circulating water flow, and the sixth flow represents the ash water flow at the bottom of the synthesis gas washing tower. Ensuring that these flow parameters are within the preset flow interval helps to maintain the water balance of the gasifier, thereby better controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device. The specific implementation of the above steps can effectively maintain the water balance of the gasifier and ensure the stability and efficiency of the gasification process. By controlling other flow parameters within the preset flow range, the gasifier can operate well under various working conditions, thereby improving production efficiency, reducing energy and material consumption, extending equipment life, and improving the reliability and stability of the entire system.

[0045] Optionally, the coupling association relationship also includes a third coupling relationship between the target flow parameter and the first liquid level in the liquid level parameter; based on the operating conditions, before the step of controlling other flow parameters to be within the corresponding preset flow range, the method also includes: controlling the angle valve opening of the flash angle valve based on the target flow parameter to control the first liquid level to be within the preset liquid level range, wherein the first liquid level is used to indicate the liquid level in the quenching chamber of the gasifier.

[0046] In an optional embodiment, the angle of the flash angle valve can be set according to the target flow parameter to adjust the opening of the angle valve. By controlling the opening of the flash angle valve, the liquid level of the quenching chamber of the gasifier is adjusted to ensure that the first liquid level is within the preset liquid level range. By adjusting the first liquid level, the water balance of the gasifier is controlled to maintain a stable operating state. Through the above steps, the water balance control performance of the gasifier can be improved to ensure the operating stability and efficiency of the gasifier. Through the control of the coupling association relationship, the coordination and balance between different parameters can be achieved to improve the overall performance of the gasifier. By controlling the first liquid level, the liquid level deviation or fluctuation of the gasifier can be effectively avoided, and the operational safety of the gasifier can be improved. By controlling the relationship between the target flow parameter and the liquid level parameter through the coupling association relationship, the water balance control effect of the gasifier can be effectively improved, and the operating efficiency and stability of the gasifier can be improved.

[0047] Optionally, the coupling association relationship also includes a fourth coupling relationship between other flow parameters and a fourth flow; after the step of controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device based on the target flow parameter, the method also includes: in response to changes in the flow of other flow parameters, obtaining the flow change of other flow parameters; based on the flow change, performing flow compensation on the fourth flow to obtain a horizontal balance control result.

[0048] In an optional embodiment, when controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device, in addition to the target flow parameters, the impact of changes in other flow parameters on the system can also be considered. Specifically, in response to changes in the flow of other flow parameters, the system can monitor and obtain the flow changes of other flow parameters in real time. Then, the fourth flow can be flow compensated according to the flow changes of other flow parameters to maintain the horizontal balance of the system. By adjusting the size of the fourth flow, a balance can be achieved between the various flow parameters in the system. Through the above steps, the stability and reliability of the system are improved, so that the gasification device can better adapt to changes in the external environment. Through real-time monitoring and flow compensation of other flow parameters, system fluctuations can be reduced, and gasification efficiency and product quality can be improved.

[0049] Optionally, the method also includes: determining the sum of the first flow rate, the second flow rate, the third flow rate, the fourth flow rate and the preset synthesis gas condensate to obtain a first sum value; determining the sum of the fifth flow rate and the sixth flow rate to obtain a second sum value; and determining the amount of water in the synthesis gas based on the difference between the first sum value and the second sum value.

[0050] In an optional embodiment, the sum of the first flow rate, the second flow rate, the third flow rate, the fourth flow rate and the preset synthesis gas condensate can be added to obtain a first sum value. Then, the second sum value can be calculated: the fifth flow rate and the sixth flow rate are added to obtain the second sum value. Finally, the second sum value can be subtracted from the first sum value to obtain a difference value. The amount of water in the synthesis gas is determined according to the difference value to achieve water balance control of the gasifier. By accurately calculating and adjusting the sum value of each flow rate, the purification efficiency of the synthesis gas can be improved.

[0051] The technical solution proposed in this application is explained below in combination with an optional embodiment. This application proposes a method for automatic control and correction of water balance of a dry coal powder gasifier. The fluidized bed gasification technology has great compatibility with coal types, particle sizes, sulfur content, and ash content. It is clean and efficient, representing the development trend of coal gasification technology, especially the dry coal powder pressurized gasification technology, which can be used as the mainstream technology of coal gasification technology. The water balance control of the dry coal powder pressurized gasification device centered on the synthesis gas washing tower occupies a relatively important position in the operation of the gasification device. If the water balance control is improper, first, it will cause a large amount of ash in the synthesis gas, the synthesis gas pipeline will be blocked, the system pressure difference will rise, and the high-load operation of the gasifier will be restricted; second, it will cause a large amount of slag in the synthesis gas, the pipeline will be easily worn and leaked, and the synthesis gas washing tower tray will be blocked, which will cause the synthesis gas to carry water, restricting the stable operation of the conversion device. Therefore, a method for water balance control of a gasifier is more important for dry coal powder gasification technology, affecting whether the gasifier can operate at full load for a long period of time.

[0052] The present application can achieve the purpose of precise control by coupling and associating various parameters related to water balance in the dry coal powder gasification device, and can solve the problems of easy blockage of synthesis gas pipelines, easy wear and leakage of pipelines, and easy blockage of synthesis gas washing tower trays.

[0053] First, in the present application: L1 is the liquid level of the gasifier quenching chamber; P1 is the synthesis gas pressure at the outlet of the gasifier; P2 is the synthesis gas pressure at the outlet of the venturi gas-liquid separator; P3 is the synthesis gas pressure at the outlet of the synthesis gas washing tower; T1 is the synthesis gas temperature at the outlet of the gasifier; T2 is the synthesis gas temperature at the outlet of the venturi gas-liquid separator; T3 is the synthesis gas temperature at the outlet of the synthesis gas washing tower; F1 is the Venturi washing water flow rate; F2 is the washing water flow rate of the upper tray of the synthesis gas washing tower, that is, desalted water or conversion condensate, used for fine washing; F3 is the washing water flow rate of the tray in the synthesis gas washing tower, that is, system recycled water, used for rough washing; F4 is the liquid replenishment flow rate of the kettle of the synthesis gas washing tower; F5 is the quenching circulating water flow rate, which is used to cool the high-temperature synthesis gas in the gasifier downcomer; F6 is the ash water flow rate at the bottom of the synthesis gas washing tower; F7 is the black water flow rate from the gasifier to the black water flash evaporation system.

[0054] L1 here can be the first liquid level mentioned above; F1, F2, F3, F4, F5 and F6 here can be the first flow rate, second flow rate, third flow rate, fourth flow rate, fifth flow rate and sixth flow rate mentioned above respectively, and can refer to the other flow parameters mentioned above; F7 here can be the target flow parameter mentioned above.

[0055] The specific technical solution of the present application may be: automatically control the flash angle valve through F7 to ensure that the liquid level L1 in the quenching chamber of the gasifier is controlled between 25-45%, to ensure that the synthesis gas is fully washed and cooled, so as to ensure the safe operation of the device. If it cannot be adjusted to this range, an alarm is issued to remind the post personnel to manually analyze and adjust, that is, to control the angle valve opening of the flash angle valve based on the target flow parameter to control the first liquid level to be within the preset liquid level range.

[0056] Then, according to the operating conditions of the gasifier, the flow rates of the six routes, including F1-F6, can be adjusted to normal operating values ​​(F1: 100-150t / h, F2: 60-90t / h, F3: 90-120t / h, F4: 0-50t / h, F5: 480-560t / h, F6: 30-90t / h); that is, based on the operating conditions of the gasifier, other flow parameters are controlled to be within the corresponding preset flow range.

[0057] Next, in order to prevent the synthesis gas from carrying ash or slag, which will cause the system pressure difference to rise or the pipeline to wear and the washing tower tray to be blocked, F7 is used to automatically control the opening of the flash angle valve in the range of 446-515t / h to adjust the synthesis gas leaving the quenching chamber of the gasifier to be slightly water-containing. The smaller the angle valve opening, the higher the liquid level in the quenching chamber, and the larger the water content of the synthesis gas; the water content is 40-60t / h; that is, the angle valve opening of the flash angle valve in the dry pulverized coal gasification device is controlled based on the target flow parameter to control the water content of the synthesis gas to be within the preset water content range.

[0058] The calculation of the water volume F in the present application can be expressed as: F = washing tower inlet water - washing tower outlet water = (F1 + F2 + F3 + F4 + synthesis gas condensate) - (F5 + F6) = F5 + C-F7.

[0059] This formula and control strategy are written into the distributed control system (DCS) control system, where C is the flushing water volume of the gasifier liquid level meter, a fixed value, generally 6-15t / h. Synthesis gas condensate = saturated steam content of synthesis gas at temperature T1 and pressure P1 - saturated steam content of synthesis gas at temperature T3 and pressure P3. For the same gasifier under normal operating conditions, this value is basically a fixed value and can be calculated in advance according to the operating conditions.

[0060] Then, when any value of F1 to F6 fluctuates, the system can be fed back to the system through the formula F=(F1+F2+F3+F4+syngas condensate)-(F5+F6) to automatically adjust F4. For example, when the flow rate of F2 decreases by 5t / h, the system automatically controls F4 to increase by 5t / h, that is, in response to the change in the flow rate of other flow parameters, the flow change of other flow parameters is obtained; based on the flow change, the fourth flow is compensated to obtain the water balance control result.

[0061] Then, when F5 fluctuates, the system can be fed back through the formula F=F5+C-F7 to automatically adjust F7. For example, when the flow rate of F5 decreases by 10t / h, the flash angle valve is automatically adjusted to reduce F7 by 10t / h.

[0062] Finally, during the automatic adjustment process, if any value from F1 to F7 exceeds the upper or lower limit of the range, an alarm will be issued to prompt the on-site personnel to manually analyze and adjust.

[0063] The present application couples and correlates various parameters involved in water balance in the dry coal powder gasification device to form a calculation formula for accurately controlling the water balance. It can effectively guide the workplace to solve problems such as easy blockage of the synthesis gas pipeline, easy wear and leakage of the pipeline, and easy blockage of the synthesis gas washing tower tray by controlling the water content of the synthesis gas, thereby ensuring the gasifier to operate at full load for a long period of time.

[0064] Figure 2 is a schematic diagram of an optional dry coal powder gasification device according to an embodiment of the present application, such as Figure 2As shown, the dry pulverized coal gasification device can be connected to the synthesis gas conversion device and the ash water de-flashing device; the dry pulverized coal gasification device may include a gasifier, a venturi scrubber, a venturi gas-liquid separator, a synthesis gas washing tower, a quenching circulating water pump, a flash angle valve and a black water flash device, the venturi scrubber can input venturi washing water, the synthesis gas washing tower can input upper tower plate washing water, middle tower plate washing water and tower kettle replenishing water, the synthesis gas washing tower can also input quenching circulating water to the gasifier through the quenching circulating water pump, wherein L1 is the liquid level of the gasifier quenching chamber; P1 is the synthesis gas pressure at the outlet of the gasifier; P2 is the synthesis gas pressure at the outlet of the venturi gas-liquid separator; P3 is the syngas pressure at the outlet of the syngas scrubber; T1 is the syngas temperature at the outlet of the gasifier; T2 is the syngas temperature at the outlet of the venturi gas-liquid separator; T3 is the syngas temperature at the outlet of the syngas scrubber; F1 is the venturi washing water flow; F2 is the washing water flow of the upper tray of the syngas scrubber, that is, desalted water or conversion condensate, used for fine washing; F3 is the washing water flow of the tray in the syngas scrubber, system recycled water, used for rough washing; F4 is the liquid replenishment flow of the kettle of the syngas scrubber; F5 is the quenching circulating water flow, used to cool the high-temperature syngas in the gasifier downcomer; F6 is the ash water flow at the bottom of the syngas scrubber; F7 is the black water flow from the gasifier to the black water flash evaporation system.

[0065] According to another aspect of an embodiment of the present invention, a water balance control device for a gasifier is also provided. The device can execute the water balance control method for a gasifier of the above embodiment. The specific implementation method and preferred application scenario are the same as those of the above embodiment and will not be repeated here.

[0066] Figure 3 is a schematic diagram of a water balance control device for a gasifier according to an embodiment of the present application, such as Figure 3 As shown, the device includes the following: an acquisition module 302 , a construction module 304 and a control module 306 .

[0067] Among them, an acquisition module is used to obtain multiple monitoring parameters of a dry coal powder gasification device in which a gasifier to be subjected to water balance control is located, wherein the multiple monitoring parameters include at least liquid level parameters, air pressure parameters, temperature parameters and liquid flow parameters at different positions in the dry coal powder gasification device; a construction module is used to construct a coupling association relationship of the dry coal powder gasification device based on multiple monitoring parameters, wherein the coupling association relationship is used to represent the association relationship that needs to be satisfied between multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; a control module is used to control the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result, wherein the water balance control result is used to characterize that the water content of the synthesis gas in the gasifier is within a preset water content range.

[0068] Among them, the coupling association relationship includes at least a first coupling relationship between a target flow parameter in the liquid flow parameter and the water content of the synthesis gas; the control module is also used to control the angle valve opening of the flash angle valve in the dry pulverized coal gasification device based on the target flow parameter, so as to control the water content of the synthesis gas to be within a preset water content range, and obtain a water balance control result, wherein the target flow parameter is used to characterize the black water flow from the gasifier to the black water flash system.

[0069] Among them, the coupling association relationship also includes a second coupling relationship between the operating conditions of the gasifier and other flow parameters in the liquid flow parameters; before the step of controlling the angle valve opening of the flash angle valve in the dry pulverized coal gasification device based on the target flow parameter, the control module is also used to control other flow parameters to be within the corresponding preset flow range based on the operating conditions, wherein the other flow parameters are used to characterize other flows in the liquid flow parameters except the target flow parameters, and the other flow parameters include at least one of the following: a first flow, a second flow, a third flow, a fourth flow, a fifth flow and a sixth flow, the first flow is used to represent the Venturi washing water flow, the second flow is used to represent the washing water flow of the upper tray of the synthesis gas washing tower, the third flow is used to represent the washing water flow of the tray in the synthesis gas washing tower, the fourth flow is used to represent the liquid replenishment flow of the kettle of the synthesis gas washing tower, the fifth flow is used to represent the quenching circulating water flow, and the sixth flow is used to represent the ash water flow at the bottom of the synthesis gas washing tower.

[0070] Among them, the coupling association relationship also includes a third coupling relationship between the target flow parameter and the first liquid level in the liquid level parameter; based on the operating conditions, before the step of controlling other flow parameters to be within the corresponding preset flow range, the control module is also used to control the angle valve opening of the flash angle valve based on the target flow parameter to control the first liquid level to be within the preset liquid level range, wherein the first liquid level is used to indicate the liquid level in the quenching chamber of the gasifier.

[0071] Among them, the coupling association relationship also includes a fourth coupling relationship between other flow parameters and the fourth flow; after the step of controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device based on the target flow parameter, the control module is also used to respond to changes in the flow of other flow parameters to obtain the flow change of other flow parameters; based on the flow change, the fourth flow is flow compensated to obtain a horizontal balance control result.

[0072] Among them, the control module is also used to determine the sum of the first flow rate, the second flow rate, the third flow rate, the fourth flow rate and the preset synthesis gas condensate to obtain a first sum value; determine the sum of the fifth flow rate and the sixth flow rate to obtain a second sum value; and determine the water content of the synthesis gas based on the difference between the first sum value and the second sum value.

[0073] An embodiment of the present application further provides an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention when running.

[0074] The above-mentioned memory may refer to a device inside a computer for storing data and programs, and may include memory, hard disk, etc., wherein the memory may be used to temporarily store running programs and data, the hard disk may be used to store programs and data for a long time, and the memory may be used to enable the computer to read and write data, and execute programs; the above-mentioned processor may be responsible for executing instructions in computer programs and performing data processing, and may be responsible for controlling and executing various operations, including arithmetic operations, logical operations, data transmission, etc.

[0075] An embodiment of the present application further provides a computer-readable storage medium, which includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0076] The above-mentioned computer storage medium may refer to a medium in a computer memory used to store certain discontinuous physical quantities. Computer storage media mainly include semiconductors, magnetic cores, magnetic drums, magnetic tapes, laser disks, etc.; the stored program included in the computer-readable storage medium may be a set of instructions that can be recognized and executed by a computer, running on an electronic computer, and is an information tool that meets certain needs of people.

[0077] An embodiment of the present application further provides a computer program product, including a computer program, which implements the methods in various embodiments of the present invention when executed by a processor.

[0078] The above-mentioned computer program product may refer to a software program that has been written, tested and released and can be run on a computer or other device. The computer program product may include an application, an operating system, tool software, etc., which is used to implement specific functions or solve specific problems.

[0079] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0080] The above-mentioned non-volatile computer-readable storage medium may refer to a medium for storing data. The non-volatile computer-readable storage medium can keep the data from being lost when the power is off, and can be used to store long-term data, such as operating systems, applications, and user files. The non-volatile storage medium may include hard disk drives, solid-state drives, optical disks, and flash memory storage devices, etc.

[0081] The embodiments of the present application further provide a computer program, which implements the methods in the above-mentioned embodiments of the present invention when executed by a processor.

[0082] The above-mentioned computer program may refer to a collection of instructions used to tell a computer to perform a specific task or operation. A computer program may be written by a programmer using a specific programming language and may include algorithms, data structures, logic, and control flows. A computer program may be used for a variety of purposes, including application software, operating systems, and the like.

[0083] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0085] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0086] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0087] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water balance control method for a gasifier, characterized in that: include: Acquire multiple monitoring parameters of a dry coal powder gasification device in which the gasifier to be subjected to water balance control is located, wherein the multiple monitoring parameters at least include liquid level parameters, gas pressure parameters, temperature parameters and liquid flow parameters at different positions in the dry coal powder gasification device; Constructing a coupling association relationship of the dry coal powder gasification device based on the multiple monitoring parameters, wherein the coupling association relationship is used to represent the association relationship that needs to be satisfied between the multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; The water balance of the gasifier is controlled based on the coupling association to obtain a water balance control result, wherein the water balance control result is used to indicate that the water content of the synthesis gas in the gasifier is within a preset water content range.

2. The water balance control method of a gasifier according to claim 1, characterized in that: The coupling association relationship at least includes a first coupling relationship between a target flow parameter in the liquid flow parameter and the amount of water carried by the synthesis gas; The water balance of the gasifier is controlled based on the coupling relationship to obtain a water balance control result, including: The angle valve opening of the flash angle valve in the dry pulverized coal gasification device is controlled based on the target flow parameter to control the water content of the synthesis gas within the preset water content range to obtain the water balance control result, wherein the target flow parameter is used to characterize the black water flow from the gasifier to the black water flash system.

3. The water balance control method of the gasifier according to claim 2, characterized in that: The coupling association relationship also includes a second coupling relationship between the operating condition of the gasifier and other flow parameters in the liquid flow parameter; Before the step of controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device based on the target flow parameter, the method further includes: Based on the operating conditions, the other flow parameters are controlled to be within the corresponding preset flow range, wherein the other flow parameters are used to characterize other flows in the liquid flow parameters except the target flow parameters, and the other flow parameters include at least one of the following: a first flow, a second flow, a third flow, a fourth flow, a fifth flow and a sixth flow, the first flow is used to represent the venturi washing water flow, the second flow is used to represent the washing water flow of the upper tray of the synthesis gas washing tower, the third flow is used to represent the washing water flow of the tray in the synthesis gas washing tower, the fourth flow is used to represent the liquid replenishment flow of the kettle of the synthesis gas washing tower, the fifth flow is used to represent the quenching circulating water flow, and the sixth flow is used to represent the gray water flow at the bottom of the synthesis gas washing tower.

4. The water balance control method of a gasifier according to claim 3, characterized in that: The coupling association relationship further includes a third coupling relationship between the target flow parameter and the first liquid level in the liquid level parameter; Before the step of controlling the other flow parameters to be within the corresponding preset flow range based on the operating conditions, the method further includes: The angle valve opening of the flash angle valve is controlled based on the target flow parameter to control the first liquid level to be within a preset liquid level range, wherein the first liquid level is used to represent the liquid level of the quenching chamber of the gasifier.

5. The water balance control method of a gasifier according to claim 3, characterized in that: The coupling association relationship further includes a fourth coupling relationship between the other flow parameters and the fourth flow; After the step of controlling the angle valve opening of the flash angle valve in the dry coal powder gasification device based on the target flow parameter, the method further includes: In response to a change in the flow rate of the other flow parameter, acquiring a flow rate change amount of the other flow parameter; Based on the flow change, flow compensation is performed on the fourth flow to obtain the water balance control result.

6. The water balance control method of a gasifier according to claim 3, characterized in that: The method further comprises: Determine a sum of the first flow rate, the second flow rate, the third flow rate, the fourth flow rate, and a preset synthesis gas condensate to obtain a first sum value; determining a sum of the fifth flow rate and the sixth flow rate to obtain a second sum; The amount of water in the synthesis gas is determined based on the difference between the first sum and the second sum.

7. A water balance control device for a gasifier, characterized in that: include: an acquisition module, used for acquiring a plurality of monitoring parameters of a dry coal powder gasification device in which the gasifier to be subjected to water balance control is located, wherein the plurality of monitoring parameters at least include a liquid level parameter, a gas pressure parameter, a temperature parameter and a liquid flow parameter at different positions in the dry coal powder gasification device; A construction module, used to construct a coupling association relationship of the dry coal powder gasification device based on the multiple monitoring parameters, wherein the coupling association relationship is used to represent the association relationship that needs to be satisfied between the multiple monitoring parameters when the dry coal powder gasification device is in a preset normal operating condition; A control module is used to control the water balance of the gasifier based on the coupling association relationship to obtain a water balance control result, wherein the water balance control result is used to indicate that the water content of the synthesis gas in the gasifier is within a preset water content range.

8. An electronic device, characterized in that: include: A memory storing an executable program; A processor is used to run the program, wherein the water balance control method for a gasifier according to any one of claims 1 to 6 is executed when the program is run.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the storage medium is located is controlled to execute the water balance control method for the gasifier according to any one of claims 1 to 6.

10. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the water balance control method of the gasifier according to any one of claims 1 to 6.

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