Method and device for controlling powder discharge from a powder bin

Abstract

The present disclosure provides a method and device for controlling the discharging of powder in a powder bin, an electronic device and a storage medium. The initial pressure curve of the downstream boiler furnace of the powder bin and the initial oxygen content curve of the specific position of the boiler are obtained based on an industrial host computer, and the reference pressure curve of the downstream boiler furnace of the powder bin and the reference oxygen content curve of the specific position of the boiler are obtained when the powder in the powder bin is in different flow patterns. According to the initial pressure curve, the initial oxygen content curve, the reference pressure curve and the reference oxygen content curve, the target flow pattern of the powder in the powder bin is determined, and the target control instruction is executed on the powder bin and / or the powder in response to the target flow pattern of the powder in the powder bin. Through the present disclosure, the flow pattern of the powder can be accurately determined in combination with the initial pressure curve of the downstream boiler furnace of the powder bin and the initial oxygen content curve of the specific position of the boiler, so that targeted control measures can be taken for different powder flow patterns to maintain the discharging amount and stability of the powder bin.

Description

Technical Field

[0001] This disclosure relates to the field of powder silo equipment technology, and in particular to a method and apparatus for controlling the discharge of powder in a powder silo. Background Technology

[0002] The movement of powder within a powder silo is a complex process. Powder particles and agglomerates within the silo are subject to gravity, interparticle agglomeration, interparticle friction, and are also constrained by the shape, size, and material of the silo. This results in phenomena such as agglomeration, collision, rolling, sliding, and settling of the powder within the silo, leading to different flow patterns. Under different flow patterns, the discharge rate and discharge stability of the powder silo will vary significantly.

[0003] Therefore, how to determine the flow pattern of powder in the powder silo and take targeted control measures for different powder flow patterns to maintain the discharge volume and discharge stability of the powder silo is an urgent problem to be solved. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this disclosure is to propose a method, device, electronic equipment and storage medium for controlling the discharge of powder in a powder silo, which can accurately determine the flow pattern of the powder by combining the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve of a specific location in the boiler, thereby enabling targeted control measures to be taken for different powder flow patterns to maintain the discharge volume and discharge stability of the powder silo.

[0006] The method for controlling powder feeding in a powder silo according to the first aspect of this disclosure includes: acquiring the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler based on an industrial host computer; acquiring the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve at a specific location in the boiler when the powder in the powder silo is in different flow patterns; determining the target flow pattern of the powder in the powder silo based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve; and executing a target control command on the powder silo and / or the powder in response to the powder in the powder silo being in the target flow pattern.

[0007] The method for controlling powder discharge in a powder silo, as proposed in the first aspect of this disclosure, acquires the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler based on an industrial host computer. It also acquires the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve at a specific location in the boiler when the powder in the silo is in different flow patterns. Based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve, the target flow pattern of the powder in the powder silo is determined. In response to the powder in the silo being in the target flow pattern, a target control command is executed on the powder silo and / or the powder. Through this disclosure, the flow pattern of the powder can be accurately determined by combining the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler. This allows for targeted control measures to be taken for different powder flow patterns to maintain the discharge rate and stability of the powder silo.

[0008] The apparatus for controlling the discharge of powder in a powder silo according to the second aspect of this disclosure includes: a first acquisition module, used to acquire the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve of a specific location in the boiler based on an industrial host computer; a second acquisition module, used to acquire the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve of a specific location in the boiler when the powder in the powder silo is in different flow states; a first determination module, used to determine the target flow state of the powder in the powder silo based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve; and an execution module, used to execute a target control command on the powder silo and / or the powder in response to the powder in the powder silo being in the target flow state.

[0009] The device for controlling powder feeding in a powder silo, as proposed in the second aspect of this disclosure, acquires the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler based on an industrial host computer. It also acquires the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve at a specific location in the boiler when the powder in the silo is in different flow patterns. Based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve, the target flow pattern of the powder in the powder silo is determined. In response to the powder in the silo being in the target flow pattern, a target control command is executed on the powder silo and / or the powder. Through this disclosure, the flow pattern of the powder can be accurately determined by combining the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler. This allows for targeted control measures to be taken for different powder flow patterns to maintain the discharge rate and stability of the powder silo.

[0010] A third aspect of this disclosure provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for controlling the feeding of powder in a powder hopper as described in the first aspect of this disclosure.

[0011] The fourth aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for controlling the feeding of powder in a powder hopper as described in the first aspect of this disclosure.

[0012] The fifth aspect of this disclosure provides a computer program product that, when executed by an instruction processor, performs a method for controlling the feeding of powder in a powder hopper as described in the first aspect of this disclosure.

[0013] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 This is a schematic flowchart of a method for controlling the feeding of powder in a powder hopper according to an embodiment of this disclosure;

[0016] Figure 2a This is a schematic diagram of powder distribution based on an embodiment of the overall flow pattern proposed in this disclosure;

[0017] Figure 2b This is a schematic diagram of powder distribution in a variant overall flow pattern proposed in an embodiment of the present disclosure;

[0018] Figure 3a This is a schematic diagram of a reference pressure curve when the powder is in a bulk flow state according to an embodiment of the present disclosure;

[0019] Figure 3b This is a schematic diagram of a reference oxygen content curve when the powder is in a bulk flow state according to an embodiment of this disclosure;

[0020] Figure 4a This is a schematic diagram of a reference pressure curve when the powder is in a central flow pattern according to an embodiment of this disclosure;

[0021] Figure 4b This is a schematic diagram of a reference oxygen content curve when the powder is in a central flow pattern according to an embodiment of this disclosure;

[0022] Figure 5 This is a schematic diagram of powder distribution in a dynamic arch flow pattern proposed in an embodiment of this disclosure;

[0023] Figure 6aThis is a schematic diagram of a reference pressure curve when the powder is in a dynamic arch flow state according to an embodiment of this disclosure;

[0024] Figure 6b This is a schematic diagram of a reference oxygen content curve when the powder is in a dynamic arch flow state according to an embodiment of this disclosure;

[0025] Figure 7 This is a schematic diagram of powder distribution in a stable arch flow pattern proposed in an embodiment of the present disclosure;

[0026] Figure 8a This is a schematic diagram of a reference pressure curve when the powder is in a stable arched flow state according to an embodiment of this disclosure;

[0027] Figure 8b This is a schematic diagram of a reference oxygen content curve when the powder is in a stable arched flow state according to an embodiment of this disclosure;

[0028] Figure 9 This is a flowchart illustrating a method for controlling powder feeding in a powder hopper according to another embodiment of this disclosure;

[0029] Figure 10 This is a schematic diagram of powder distribution in a funnel flow pattern according to an embodiment of the present disclosure;

[0030] Figure 11 This is a schematic diagram of powder distribution in a tubular flow pattern according to an embodiment of the present disclosure;

[0031] Figure 12 This is a schematic diagram of the structure of a device for controlling the feeding of powder in a powder hopper according to an embodiment of this disclosure;

[0032] Figure 13 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Detailed Implementation

[0033] Embodiments of this disclosure are described in detail below, with examples of embodiments illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0034] Figure 1 This is a schematic flowchart of a method for controlling the feeding of powder in a powder hopper according to an embodiment of this disclosure.

[0035] It should be noted that the execution subject of the method for controlling the powder feeding in the powder hopper in this embodiment is a device for controlling the powder feeding in the powder hopper. This device can be implemented by software and / or hardware. This device can be configured in an electronic device, which may include, but is not limited to, a terminal, a server, etc.

[0036] like Figure 1 As shown, the method for controlling the powder feeding in the powder silo includes:

[0037] S101: Based on the industrial host computer, obtain the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve of a specific location in the boiler.

[0038] The control of powder feeding in the powder silo described in this embodiment can be exemplified by the fuel powder silo of a boiler, but it can also be used to control the powder feeding process of the upstream powder silo of any other powder fuel heat utilization equipment, without limitation.

[0039] The specific location of the boiler can be, for example, the flue at the tail end of the boiler, without any restrictions.

[0040] The initial pressure curve can be the pressure-time change curve of the boiler furnace downstream of the pulverized coal silo within a certain time period. Correspondingly, the initial oxygen content curve can be the oxygen content-time change curve of a specific location in the boiler within a certain time period, without any restrictions.

[0041] In other words, in this embodiment of the present disclosure, the pressure of the boiler furnace downstream of the pulverized coal silo and the oxygen content at a specific location of the boiler can be monitored by an industrial host computer within a certain preset time period, so as to obtain the current pressure-time change curve of the boiler furnace downstream of the pulverized coal silo as the initial pressure curve, and obtain the oxygen content-time change curve at a specific location of the boiler as the initial oxygen content curve.

[0042] S102: Obtain the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve of a specific location in the boiler when the powder in the powder silo is in different flow states.

[0043] In this context, when the powder in the powder silo is in different flow states, the pressure curve of the downstream boiler furnace of the powder silo, which is collected in advance within a preset time period before and after the powder exhibits a certain flow state, can be called the reference pressure curve. The oxygen content curve of a specific location in the boiler, which is collected in advance within a preset time period before and after the powder exhibits a certain flow state, can be called the reference oxygen content curve. The reference pressure curve and the reference oxygen content curve of the specific location in the boiler can be used to assist in judging the target flow state of the powder in the powder silo during the subsequent execution of the method for controlling the powder feeding in the powder silo. For details, please refer to the following embodiments.

[0044] S103: Determine the target flow pattern of powder in the powder hopper based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve.

[0045] In this embodiment of the invention, after obtaining the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve of a specific location in the boiler when the powder in the powder silo is in different flow states, the target flow state of the powder in the powder silo can be determined based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve.

[0046] In this embodiment of the disclosure, the target flow patterns include: overall flow pattern, central flow pattern, dynamic arch flow pattern, and stable arch flow pattern.

[0047] The overall flow pattern refers to a situation where the powder is fed uniformly, and the powder that enters the silo first flows out first. Dead zones may form in some areas of the silo, but the powder structure within these dead zones remains stable and does not collapse or sputter. Under this flow pattern, the feeding rate is relatively high and stable with minimal fluctuations. However, due to the excessively good powder flowability, screw discharge valves and rotary valves may not be able to effectively control the silo's operation at lower feeding rates. This flow pattern is generally more likely to occur in high-temperature, dry environments, and when the powder has a high gas content. See [link to relevant documentation]. Figure 2a , Figure 2b , Figure 2a This is a schematic diagram of powder distribution in an embodiment of the overall flow pattern proposed in this disclosure. Figure 2b This is a schematic diagram of powder distribution in a variant overall flow pattern proposed in an embodiment of this disclosure.

[0048] In this embodiment, taking the fuel pulverizer silo of a boiler as an example, due to the stable feed rate, the pressure curve of the furnace and the oxygen content curve at a specific location in the boiler are stable during operation. However, because the feed rate is generally high at this time, the oxygen content at a specific location in the boiler is generally low under normal air distribution conditions, typically below 2%. The specific value varies depending on the boiler. When the pulverizer is in a general flow state within the silo, the reference pressure curve can be as follows: Figure 3a As shown, Figure 3a This is a schematic diagram of a reference pressure curve when the powder is in a bulk flow state according to an embodiment of this disclosure. The reference oxygen content curve can be as follows: Figure 3b As shown, Figure 3b This is a schematic diagram of a reference oxygen content curve when the powder is in a bulk flow state according to an embodiment of this disclosure.

[0049] Among them, the central flow pattern refers to a situation where only part of the powder flows, while the rest of the powder remains on the side wall, forming a dead zone. The powder in the dead zone on the side wall may experience random collapse or jetting, leading to problems such as drastic fluctuations in the powder feed rate and intermittent feeding.

[0050] In this embodiment of the disclosure, taking a boiler fuel pulverizer silo as an example, due to the frequent collapse of the flow dead zone, jetting often occurs at the silo outlet, and the feeding stability begins to deteriorate. Therefore, the pressure curves in the furnace and the oxygen content curves at specific locations in the boiler begin to fluctuate more, and the fluctuations are non-periodic. When the powder in the silo is in a central flow state, the reference pressure curve can be as follows: Figure 4a As shown, Figure 4a This is a schematic diagram of a reference pressure curve when the powder is in a central flow pattern, as proposed in an embodiment of this disclosure. The reference oxygen content curve can be as follows: Figure 4b As shown, Figure 4b This is a schematic diagram of a reference oxygen content curve when the powder is in a central flow pattern, according to an embodiment of this disclosure.

[0051] The dynamic arch flow pattern refers to the formation of multiple unstable arches along the height of the powder silo. The powder within these arches is relatively dense, but it cannot exist stably in a relatively fixed area. Instead, it continuously falls from the powder silo as the powder flows down. During this flow, new dynamic arches are formed, creating a continuous cycle. The powder discharge rate within the silo exhibits approximately periodic fluctuations (the period is generally several minutes, with the discharge rate increasing when the arches exit). See [link / reference] Figure 5 , Figure 5 This is a schematic diagram of powder distribution in a dynamic arch flow pattern proposed in an embodiment of this disclosure.

[0052] In this embodiment of the disclosure, taking a boiler fuel pulverizer as an example, the furnace pressure and oxygen content curves at specific locations in the boiler exhibit obvious periodic fluctuations, typically occurring every few minutes to tens of minutes. A significant peak appears on the furnace pressure curve (due to a sudden increase in fuel input, resulting in increased local pressure), and correspondingly, a significant trough appears on the oxygen content curve (due to increased fuel input, leading to increased oxygen consumption). The peaks in furnace pressure appear and disappear relatively quickly, while the troughs in oxygen content appear and disappear relatively gradually. The reference pressure curve can be seen as follows: Figure 6a As shown, Figure 6a This is a schematic diagram of a reference pressure curve for powder in a dynamic arched flow state according to an embodiment of this disclosure. The reference oxygen content curve can be as follows: Figure 6b As shown, Figure 6b This is a schematic diagram of a reference oxygen content curve when the powder is in a dynamic arch flow state, according to an embodiment of this disclosure.

[0053] The stable arch flow pattern refers to the formation of a dense, stable arch near the powder silo outlet. The presence of this stable arch disrupts the smooth flow of powder within the silo, resulting in a low and unstable discharge rate. In severe cases, the stable arch can lead to a material shortage. When the stable arch suddenly collapses, a large amount of dense fuel powder falls, causing severe unloading impact and a sudden influx of fuel into the boiler, potentially leading to a deflagration accident. (See also...) Figure 7 , Figure 7 This is a schematic diagram of powder distribution in a stable arch flow pattern proposed in an embodiment of the present disclosure.

[0054] In this embodiment, taking the boiler fuel pulverizer silo as an example, the pressure curve of the furnace exhibits obvious non-periodic fluctuations. When there is a tendency for fuel shortage or arching / collapse, the furnace pressure will show dramatic alternations between peaks and troughs. The oxygen content curve at a specific location in the boiler also exhibits obvious non-periodic fluctuations. When there is a tendency for fuel shortage, the oxygen content will increase sharply and then gradually recover; when there is a tendency for arching / collapse, the oxygen content at that specific location in the boiler will decrease sharply and then gradually recover. In actual operation, the tendencies for fuel shortage and arching / collapse often coexist. The reference pressure curve can be as follows: Figure 8a As shown, Figure 8a This is a schematic diagram of a reference pressure curve for powder in a stable arched flow state according to an embodiment of this disclosure. The reference oxygen content curve can be shown as follows: Figure 8b As shown, Figure 8b This is a schematic diagram of a reference oxygen content curve when the powder is in a stable arched flow state according to an embodiment of this disclosure.

[0055] S104: In response to the powder being in a target flow pattern in the powder hopper, execute a target control command on the powder hopper and / or the powder.

[0056] After determining the target flow pattern of the powder in the powder hopper based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve, this embodiment of the present disclosure can execute target control commands on the powder hopper and / or the powder in response to the powder being in the target flow pattern, thereby enabling targeted control measures to be taken for different powder flow patterns to maintain the discharge volume and discharge stability of the powder hopper.

[0057] In this embodiment, the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler are obtained by an industrial host computer. Reference pressure curves of the boiler furnace downstream of the powder silo and reference oxygen content curves at a specific location in the boiler are also obtained when the powder in the powder silo is in different flow patterns. Based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve, the target flow pattern of the powder in the powder silo is determined. In response to the powder in the powder silo being in the target flow pattern, target control commands are executed on the powder silo and / or the powder. Through this disclosure, the flow pattern of the powder can be accurately determined by combining the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler. This allows for targeted control measures to be taken for different powder flow patterns to maintain the discharge rate and stability of the powder silo.

[0058] Figure 9 This is a flowchart illustrating a method for controlling the feeding of powder in a powder hopper according to another embodiment of this disclosure.

[0059] like Figure 9 As shown, the method for controlling the powder feeding in the powder silo includes:

[0060] S901: Based on the industrial host computer, obtain the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve of a specific location in the boiler.

[0061] S902: Obtain the reference pressure curve of the downstream boiler furnace and the reference oxygen content curve of a specific location in the boiler when the powder in the powder silo is in different flow states.

[0062] S903: Determine the target flow pattern of powder in the powder hopper based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve.

[0063] For a detailed description of S901-S903, please refer to the above embodiments, which will not be repeated here.

[0064] S904: If the target flow pattern is a center flow pattern, determine the first or second remaining amount of powder in the powder silo, and the powder distribution status shown by the high level gauge, medium level gauge, and low level gauge.

[0065] In this embodiment of the present disclosure, after determining that the target flow pattern of the powder in the powder silo is a central flow pattern based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve, the first remaining amount or the second remaining amount of powder in the powder silo, the powder distribution state displayed by the high level gauge, the medium level gauge, and the low level gauge can be determined, and the flow pattern of the powder in the powder silo can be specifically determined based on the first remaining amount or the second remaining amount of powder in the powder silo, the powder distribution state displayed by the high level gauge, the medium level gauge, and the low level gauge.

[0066] The first remaining amount of powder in the powder silo refers to the amount of powder remaining in the silo during the feeding process. By using various methods (such as increasing the discharge volume or reducing the amount of material fed into the silo), the amount of powder in the silo can be easily reduced to 1 / 5 of the full load. At this point, the remaining amount of powder in the silo (i.e., 1 / 5 of the full load) is the first remaining amount. At this point, the flow pattern of the target powder can be judged in conjunction with the first remaining amount. It is not necessary to continue to reduce the amount of powder in the silo by the aforementioned methods, so as to avoid the powder in the silo becoming too low and causing material shortage.

[0067] The second remaining amount of powder in the powder silo refers to the amount of powder remaining in the silo at the moment when the powder stops flowing (the powder is crushed and cannot continue to flow) after various means (such as increasing the discharge amount, reducing the amount of material fed into the silo, etc.) are used to reduce the amount of powder in the silo during the feeding process.

[0068] In this embodiment, the remaining amount of powder in the powder silo can be determined by measuring the load cell. The distribution of powder at different levels in the silo is determined by the illumination of the high-level, medium-level, and low-level gauges. When the corresponding level gauge is lit, it is determined that the material level is in a material-containing state; when the corresponding level gauge is off, it is determined that the material level is in a material-free state. There are no restrictions on this.

[0069] S905: If the first remaining inventory is 1 / 5 of the full load, and the high level gauge and the medium level gauge show no material, while the low level gauge shows material, then the target flow pattern is determined to be a funnel flow pattern.

[0070] In this embodiment of the disclosure, if the first remaining inventory is 1 / 5 of the full load, and the high level gauge and the medium level gauge show no material, while the low level gauge shows material, then the target flow pattern can be determined to be a funnel flow pattern. See [link to relevant documentation]. Figure 10 , Figure 10 This is a schematic diagram of powder distribution in a funnel flow pattern according to an embodiment of the present disclosure.

[0071] S906: If the powder stops flowing, the second remaining stock is 1 / 3 of the full load, and the high level gauge, medium level gauge and low level gauge all show a material presence, then the target flow pattern is determined to be a tubular flow pattern.

[0072] In this embodiment of the disclosure, if the powder stops flowing, the second remaining quantity is 1 / 3 of the full load, and the high level gauge, medium level gauge, and low level gauge are all in a material state, then the target flow pattern is determined to be a tubular flow pattern. See [link to relevant documentation]. Figure 11 , Figure 11 This is a schematic diagram of powder distribution in a tubular flow pattern according to an embodiment of the present disclosure.

[0073] S907: In response to the powder being in a general flow state within the powder hopper, execute a first control command on the powder hopper and / or the powder.

[0074] In this embodiment of the disclosure, after determining that the powder in the powder hopper is in an overall flow pattern, a first control command can be executed on the powder hopper and / or the powder.

[0075] Optionally, in some embodiments, a first control command is executed on the powder hopper and / or powder, including at least one of the following: adjusting the rotation speed of the powder hopper feed valve from a first rotation speed value to a second rotation speed value, wherein the first rotation speed value is greater than the second rotation speed value, or adjusting the powder quantity from a first quantity to a second quantity, wherein the first quantity is greater than the second quantity.

[0076] In other words, in this embodiment of the present disclosure, when the powder in the powder silo is in a state of overall flow (the powder falls like a liquid), the boiler can operate stably at high load, but there may be a problem that the feeding rate cannot be reduced. At this time, the speed of the feeding valve can be reduced (that is, the speed of the powder silo feeding valve can be adjusted from the first speed value to the second speed value, wherein the first speed value is greater than the second speed value), or the amount of powder in the silo can be appropriately reduced (that is, the amount of powder can be adjusted from the first amount to the second amount, wherein the first amount is greater than the second amount) to reduce the pressure difference between the upper and lower parts of the powder, thereby reducing and alleviating the problem.

[0077] S908: In response to the powder in the powder hopper being in a dynamic arched flow state, execute a second control command on the powder hopper and / or the powder.

[0078] In this embodiment of the disclosure, when it is determined that the powder in the powder hopper is in a dynamic arch flow pattern, a second control command can be executed on the powder hopper and / or the powder.

[0079] Optionally, in some embodiments, a second control command is executed on the powder hopper and / or the powder, including at least one of the following: adjusting the powder storage level from a first storage level to a second storage level, and / or activating the air cannon N times, wherein the air cannon is installed on the powder hopper, N>2, and / or setting the flow rate of the flow-aiding gas to 0.3-0.6 times the initial fluidization velocity of the powder particles, wherein the flow rate of the flow-aiding gas is the ratio of the flow-aiding gas volume to the maximum cross-sectional area of ​​the powder hopper.

[0080] In other words, in this embodiment of the present disclosure, when the powder in the powder silo is in a dynamic arch flow state, the powder content in the silo can be reduced as much as possible to lower the material level in the silo, that is, to reduce the space where the dynamic arch may exist. Then, the air cannon is turned on N times, with the flow-aiding air always on, and the flow-aiding gas velocity is set to 0.3-0.6 times the initial fluidization velocity of the powder particles to clear any dead zones that may exist on the powder silo wall. Then, the air cannon is turned off, and with the flow-aiding air on, the powder content in the powder silo is increased to near full load, then the powder content in the powder silo is decreased, and then increased again. This process is repeated 3-5 times, and the flow state of the powder in the powder silo can be improved from a dynamic arch flow state to a general flow state.

[0081] S909: In response to the powder being in a stable arched flow state within the powder hopper, execute a third control command on the powder hopper and / or the powder.

[0082] In this embodiment of the disclosure, when it is determined that the powder in the powder hopper is in a stable arched flow state, a third control command can be executed on the powder hopper and / or the powder.

[0083] Optionally, in some embodiments, executing a third control command on the powder hopper and / or powder can be to control the stopping of powder feeding from the powder hopper.

[0084] In other words, in this embodiment of the present disclosure, when the powder in the powder hopper is in a stable arched flow state, the safety risk of operation will increase. At this time, the powder feeding in the powder hopper can be stopped immediately and the existing powder in the powder hopper can be cleaned.

[0085] S910: In response to the powder being in a funnel flow pattern in the powder hopper, execute a fourth control command on the powder hopper and / or the powder.

[0086] In this embodiment of the disclosure, when it is determined that the powder in the powder hopper is in a funnel flow pattern, a fourth control command can be executed on the powder hopper and / or the powder.

[0087] Optionally, in some embodiments, executing a fourth control command on the powder hopper and / or powder may include at least one of the following: adjusting the powder distribution state displayed by the high-level gauge of the powder in the powder hopper to a material-containing state, and / or activating the air cannon N times, and / or setting the flow rate of the flow-aiding gas to 0.6 times the initial fluidization velocity of the powder particles.

[0088] In other words, in this embodiment of the present disclosure, when the powder in the powder silo is in a funnel flow state, the powder distribution in the silo can be maintained above the middle material level, and the flow rate of the flow-aiding gas can be turned on or increased (the flow-aiding air should be set in the dead zone) to 0.6 times the initial fluidization velocity of the powder particles to continuously activate the powder in the flow dead zone near the powder silo outlet. Generally, the flow state of the powder in the powder silo can be improved in half an hour to several hours. Alternatively, the air cannon (the air cannon is set near the dead zone) can be turned on several times to destroy the flow dead zone in a short time.

[0089] S911: In response to the powder being in a tubular flow pattern within the powder hopper, execute the fifth control command on the powder hopper and / or the powder.

[0090] In this embodiment of the disclosure, when it is determined that the powder in the powder hopper is in a funnel flow pattern, a fifth control command can be executed on the powder hopper and / or the powder.

[0091] Optionally, in some embodiments, executing a fifth control command on the powder hopper and / or powder may include at least one of the following: adjusting the powder distribution state displayed by the high-level gauge of the powder in the powder hopper to a material-containing state, and / or activating the air cannon M times, wherein M is 1 or 2, and / or setting the flow rate of the flow-aiding gas to 0.4-1.2 times the initial fluidization velocity of the powder particles.

[0092] In other words, in this embodiment of the present disclosure, when the powder in the powder silo is in a tubular flow state, in order to prevent a large amount of dead zone powder from falling in a short time, causing unloading impact and deflagration, the powder distribution state displayed by the high level gauge of the powder in the powder silo is adjusted to a material state to reduce the unloading impact. In addition, in order to prevent the large-scale collapse of dead zone powder, the air cannon can be turned on once or twice in the early stage. In the later stage, the air cannon should not be turned on, but the flow aid air is used to improve the powder flow state. The flow aid gas velocity is set to 0.4-1.2 times the initial fluidization wind velocity of the powder particles. After several hours, the powder can be changed from a tubular flow state to a funnel flow state or a modified overall flow state.

[0093] In this embodiment, the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler are obtained by an industrial host computer. Reference pressure curves of the boiler furnace downstream of the powder silo and reference oxygen content curves at specific locations in the boiler are also obtained when the powder in the powder silo is in different flow patterns. Based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve, the target flow pattern of the powder in the powder silo is determined. When the target flow pattern is a center flow pattern, the remaining powder inventory in the powder silo, the powder distribution status of the high-level gauge, medium-level gauge, and low-level gauge are determined. When the remaining inventory is 1 / 5 of the full load, and the high-level and medium-level gauges are empty while the low-level gauge is loaded, the target flow pattern is determined to be a funnel flow pattern. Finally, when the remaining inventory is 1 / 3 of the full load, and the high-level, medium-level, and low-level gauges are all loaded... When the target flow pattern is determined to be tubular flow, and in response to the powder being in a general flow pattern within the powder silo, a first control command is executed on the powder silo and / or the powder. In response to the powder being in a dynamic arch flow pattern within the powder silo, a second control command is executed on the powder silo and / or the powder. In response to the powder being in a stable arch flow pattern within the powder silo, a third control command is executed on the powder silo and / or the powder. In response to the powder being in a funnel flow pattern within the powder silo, a fourth control command is executed on the powder silo and / or the powder. In response to the powder being in a tubular flow pattern within the powder silo, a fifth control command is executed on the powder silo and / or the powder. This system can accurately determine the flow pattern of the powder by combining the initial pressure curve in the downstream boiler furnace and the initial oxygen content curve at a specific location in the boiler. This allows for targeted control measures to be taken for different powder flow patterns to maintain the discharge rate and stability of the powder silo.

[0094] like Figure 12 As shown, the device controls the powder feeding from the powder hopper. Figure 12 This is a schematic diagram of a device 120 for controlling the discharge of powder from a powder hopper according to an embodiment of this disclosure, comprising:

[0095] The first acquisition module 1201 is used to acquire the initial pressure curve in the furnace of the boiler downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler based on the industrial host computer.

[0096] The second acquisition module 1202 is used to acquire the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve at a specific location in the boiler when the powder in the powder silo is in different flow states.

[0097] The first determining module 1203 is used to determine the target flow pattern of powder in the powder hopper based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve and the reference oxygen content curve.

[0098] The execution module 1204 is used to execute target control commands on the powder hopper and / or the powder in response to the powder being in a target flow state.

[0099] In some embodiments of this disclosure, the target flow pattern is any of the following:

[0100] Overall flow pattern, central flow pattern, dynamic arch flow pattern, and stable arch flow pattern.

[0101] In some embodiments of this disclosure, the central flow patterns include: funnel flow patterns and tubular flow patterns;

[0102] The device 120 for controlling the powder feeding in the powder silo also includes:

[0103] The second determining module is used to determine the first remaining amount of powder in the powder silo, or the second remaining amount of powder, the powder distribution status displayed by the high level gauge, the medium level gauge and the low level gauge when the target flow pattern is a center flow pattern.

[0104] The third determining module is used to determine that the target flow pattern is a funnel flow pattern when the first remaining inventory is 1 / 5 of the full load, and the high level gauge and the medium level gauge show no material, while the low level gauge shows material.

[0105] The fourth determination module is used to determine the target flow pattern as tubular flow pattern when the powder stops flowing, the second remaining inventory is 1 / 3 of the full load, and the high level gauge, medium level gauge and low level gauge all show a material presence.

[0106] In some embodiments of this disclosure, execution module 1204 is further configured to:

[0107] In response to the powder being in a state of overall flow within the powder hopper, a first control command is executed on the powder hopper and / or the powder; or

[0108] In response to the powder being in a dynamic arched flow pattern within the powder hopper, a second control command is executed on the powder hopper and / or the powder; or

[0109] In response to the powder being in a stable arched flow pattern within the powder hopper, a third control command is executed on the powder hopper and / or the powder; or

[0110] In response to the powder being in a funnel flow pattern within the powder hopper, a fourth control command is executed on the powder hopper and / or the powder; or

[0111] In response to the powder being in a tubular flow pattern within the powder hopper, a fifth control command is executed on the powder hopper and / or the powder.

[0112] In some embodiments of this disclosure, a first control command is executed on the powder hopper and / or the powder, including at least one of the following:

[0113] Adjust the rotation speed of the powder silo feed valve from a first rotation speed value to a second rotation speed value, wherein the first rotation speed value is greater than the second rotation speed value;

[0114] The stock of powder is adjusted from the first stock to the second stock, wherein the first stock is greater than the second stock.

[0115] In some embodiments of this disclosure, a second control command is executed on the powder hopper and / or the powder, including at least one of the following:

[0116] The stock of powder is adjusted from the first stock to the second stock;

[0117] The air cannon is activated N times, where the air cannon is set on the powder hopper and N>2;

[0118] Set the flow rate of the flow-aiding gas to 0.3-0.6 times the initial fluidization velocity of the powder particles.

[0119] In some embodiments of this disclosure, a third control command is executed on the powder hopper and / or the powder, including:

[0120] Stop feeding powder into the powder hopper.

[0121] In some embodiments of this disclosure, a fourth control command is executed on the powder hopper and / or the powder, including at least one of the following:

[0122] Adjust the powder distribution status displayed by the medium level gauge in the powder silo to a material-containing state;

[0123] Activate the air cannon N times;

[0124] The flow rate of the flow-aiding gas is set to 0.6 times the initial fluidization velocity of the powder particles.

[0125] In some embodiments of this disclosure, a fifth control command is executed on the powder hopper and / or powder, including at least one of the following:

[0126] Adjust the powder distribution status displayed by the high-level gauge in the powder silo to a material-containing state;

[0127] Activate the air cannon M times, where M can be either 1 or 2;

[0128] Set the flow rate of the flow-aiding gas to 0.4-1.2 times the initial fluidization velocity of the powder particles.

[0129] With the above Figures 1 to 11 Corresponding to the method for controlling powder feeding in a powder silo provided in the embodiments, this disclosure also provides a device for controlling powder feeding in a powder silo. Since the device for controlling powder feeding in a powder silo provided in the embodiments of this disclosure is similar to the one described above... Figures 1 to 11 The method for controlling powder feeding in the powder hopper provided in the embodiments corresponds to the method for controlling powder feeding in the powder hopper provided in the embodiments of this disclosure. Therefore, the implementation of the method for controlling powder feeding in the powder hopper is also applicable to the device for controlling powder feeding in the powder hopper provided in the embodiments of this disclosure. It will not be described in detail in the embodiments of this disclosure.

[0130] In this embodiment, the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler are obtained by an industrial host computer. Reference pressure curves of the boiler furnace downstream of the powder silo and reference oxygen content curves at a specific location in the boiler are also obtained when the powder in the powder silo is in different flow patterns. Based on the initial pressure curve, initial oxygen content curve, reference pressure curve, and reference oxygen content curve, the target flow pattern of the powder in the powder silo is determined. In response to the powder in the powder silo being in the target flow pattern, target control commands are executed on the powder silo and / or the powder. Through this disclosure, the flow pattern of the powder can be accurately determined by combining the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler. This allows for targeted control measures to be taken for different powder flow patterns to maintain the discharge rate and stability of the powder silo.

[0131] To implement the above embodiments, this disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for controlling the feeding of powder in the powder hopper as proposed in the foregoing embodiments of this disclosure.

[0132] To implement the above embodiments, this disclosure also proposes a non-transitory computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for controlling the feeding of powder in a powder hopper as proposed in the foregoing embodiments of this disclosure.

[0133] To implement the above embodiments, this disclosure also proposes a computer program product that, when the instruction processor in the computer program product is executed, performs the method for controlling the powder feeding in the powder hopper as proposed in the foregoing embodiments of this disclosure.

[0134] Figure 13A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Figure 13 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0135] like Figure 13 As shown, the electronic device is represented in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: one or more processors or processing units 16, system memory 28, and bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0136] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. Examples of these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0137] Electronic devices typically include a variety of computer-readable media. These media can be any available media that can be accessed by the electronic device, including volatile and non-volatile media, and removable and non-removable media.

[0138] Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 13 Not shown; usually referred to as a "hard drive".

[0139] although Figure 13Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disc drive for reading and writing to a removable non-volatile optical disc (e.g., a compact disc read-only memory (CD-ROM), a digital video disc read-only memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of this disclosure.

[0140] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of this disclosure.

[0141] The electronic device can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the electronic device, and / or with any device that enables the electronic device to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, the electronic device can also communicate with one or more networks (e.g., Local Area Network (LAN), Wide Area Network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of the electronic device via bus 18. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0142] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the method of controlling the feeding of powder in the powder hopper mentioned in the foregoing embodiments.

[0143] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0144] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0145] It should be noted that in the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0146] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0147] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0148] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0149] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0150] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0151] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0152] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for controlling the feeding of powder in a powder silo, characterized in that, The method includes: The initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler are obtained based on the industrial host computer. The reference pressure curve of the downstream boiler furnace and the reference oxygen content curve of a specific location in the boiler are obtained when the powder in the powder silo is in different flow states. The target flow pattern of the powder in the powder hopper is determined based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve. In response to the powder in the powder hopper being in the target flow pattern, a target control command is executed on the powder hopper and / or the powder.

2. The method as described in claim 1, characterized in that, The target flow pattern is any one of the following: Overall flow pattern, central flow pattern, dynamic arch flow pattern, and stable arch flow pattern.

3. The method as described in claim 2, characterized in that, The central flow patterns include: funnel flow patterns and tubular flow patterns. The method further includes: If the target flow pattern is the center flow pattern, then determine the first or second remaining amount of powder in the powder silo, and the powder distribution state shown by the high level gauge, medium level gauge and low level gauge. If the first remaining inventory is 1 / 5 of the full load, and the high level gauge and the medium level gauge show no material, while the low level gauge shows material, then the target flow pattern is determined to be the funnel flow pattern. If the powder stops flowing, the second remaining amount is 1 / 3 of the full load, and the high level gauge, the medium level gauge and the low level gauge all show a material presence, then the target flow pattern is determined to be the tubular flow pattern.

4. The method as described in claim 3, characterized in that, The step of executing a target control command on the powder hopper and / or the powder in response to the powder being in the target flow pattern includes: In response to the powder being in the overall flow pattern within the powder hopper, a first control command is executed on the powder hopper and / or the powder; or In response to the powder in the powder hopper being in the dynamic arched flow pattern, a second control command is executed on the powder hopper and / or the powder; or In response to the powder in the powder hopper being in the stable arched flow pattern, a third control command is executed on the powder hopper and / or the powder; or In response to the powder in the powder hopper being in the funnel flow pattern, a fourth control command is executed on the powder hopper and / or the powder; or In response to the powder in the powder hopper being in the tubular flow pattern, a fifth control command is executed on the powder hopper and / or the powder.

5. The method as described in claim 4, characterized in that, The execution of the first control command on the powder hopper and / or the powder includes at least one of the following: The rotational speed of the powder silo feed valve is adjusted from a first rotational speed value to a second rotational speed value, wherein the first rotational speed value is greater than the second rotational speed value; The quantity of the powder is adjusted from a first quantity to a second quantity, wherein the first quantity is greater than the second quantity.

6. The method as described in claim 5, characterized in that, The execution of the second control command on the powder hopper and / or the powder includes at least one of the following: The amount of powder in stock is adjusted from the first amount to the second amount; The air cannon is activated N times, wherein the air cannon is mounted on the powder hopper, and N>2; The flow rate of the flow-aiding gas is set to 0.3-0.6 times the initial fluidization velocity of the powder particles, wherein the flow rate of the flow-aiding gas is the ratio of the flow-aiding gas volume to the maximum cross-sectional area of ​​the powder hopper.

7. The method as described in claim 4, characterized in that, The execution of the third control command on the powder hopper and / or the powder includes: Stop feeding the powder into the powder hopper.

8. The method as described in claim 4, characterized in that, The execution of the fourth control command on the powder hopper and / or the powder includes at least one of the following: Adjust the powder distribution state displayed by the medium level gauge in the powder silo to a material-containing state; Activate the air cannon N times; The flow rate of the flow-aiding gas is set to 0.6 times the initial fluidization velocity of the powder particles.

9. The method as described in claim 4, characterized in that, The execution of the fifth control command on the powder hopper and / or the powder includes at least one of the following: Adjust the powder distribution state displayed by the high-level gauge of the powder in the powder silo to a material-containing state; Activate the air cannon M times, where M can be either 1 or 2; Set the flow rate of the flow-aiding gas to 0.4-1.2 times the initial fluidization velocity of the powder particles.

10. A device for controlling the feeding of powder in a powder silo, employing the method described in any one of claims 1-9, characterized in that, The device includes: The first acquisition module is used to acquire the initial pressure curve of the boiler furnace downstream of the powder silo and the initial oxygen content curve at a specific location in the boiler based on the industrial host computer. The second acquisition module is used to acquire the reference pressure curve of the boiler furnace downstream of the powder silo and the reference oxygen content curve of a specific location in the boiler when the powder in the powder silo is in different flow states. The first determining module is used to determine the target flow pattern of the powder in the powder hopper based on the initial pressure curve, the initial oxygen content curve, the reference pressure curve, and the reference oxygen content curve. An execution module is used to execute target control commands on the powder hopper and / or the powder in response to the powder being in the target flow pattern.

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