Bag Leak Detection Method and Device for Dust Collector System, and Dust Collector System

Abstract

The present application relates to the technical field of bag dust collectors, and discloses a method and device for detecting bag leakage in a dust collector system, and a dust collector system. The dust collector system includes a plurality of dust removal boxes, each dust removal box includes a clean gas chamber and a dirty gas chamber, and multiple rows of filter bags are arranged in the clean gas chamber. The method for detecting bag leakage includes: drawing a first dust change curve of each dust removal box in the dust collector system within a first time period; confirming the dust condition in each dust removal box according to the first dust change curve; when there is dust leakage in the current dust removal box, determining the current dust removal box as the target dust removal box, and drawing a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the target dust removal box within a second time period; determining the row of filter bags with leakage in the target dust removal box according to the second dust change curve. The present application can automatically detect whether there is leakage in the filter bags in the dust collector system and can accurately locate the filter bags with leakage.

Description

Technical Field

[0001] This application relates to the technical field of bag filters, for example, to a method and device for detecting bag leaks in a dust removal system, and a dust removal system. Background Art

[0002] During the production process of electrolytic aluminum, the flue gas generated contains a large amount of fluorides. Since fluoride ions are essential substances in the production of electrolytic aluminum, corresponding mechanisms need to be designed to collect the fluorides in the flue gas.

[0003] In the related art, a dust removal system is set up. By making the flue gas converge into the dust gas chamber of each dust removal box in the dust removal system through the flue, using the characteristic of alumina to adsorb fluorides, alumina is first mixed with the flue gas, and then the alumina is recovered by means of bag dust removal, realizing the recycling of fluorides in the flue gas.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] After the bags in the dust removal system operate for a long time, they are prone to breakage, resulting in a waste of fluoride resources. Since the dust removal system includes multiple dust removal boxes, and each dust removal box is provided with multiple bags, it is time-consuming and laborious to manually monitor and check for leaking bags. Therefore, there is an urgent need for a solution that can detect whether there are leaks in the bags in the dust removal system and accurately locate the leaking bags. Summary of the Invention

[0006] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0007] The embodiments of the present disclosure provide a method and device for detecting bag leaks in a dust removal system, and a dust removal system, which can detect whether there are leaks in the bags in the dust removal system and can accurately locate the leaking bags.

[0008] In some embodiments, the dust removal system includes multiple dust removal boxes, each dust removal box includes a clean gas chamber and a dust gas chamber, and multiple rows of bags are arranged in the clean gas chamber. The method for detecting bag leaks in the dust removal system includes: drawing a first dust change curve of each dust removal box in the dust removal system for a first time period; confirming the dust situation in each dust removal box according to the first dust change curve; when there is dust leakage in the current dust removal box, determining the current dust removal box as the target dust removal box, and drawing a second dust change curve that can reflect the change of dust data when each row of bags in the target dust removal box works within a second time period; determining the row of bags with leaks in the target dust removal box according to the second dust change curve.

[0009] Optionally, the first duration is 180 min to 200 min; and / or, the second duration is 20 min to 30 min.

[0010] Optionally, the air inlet of each row of filter bags is connected to the compressed air main pipe through a jet valve; draw a first dust change curve of each dust removal chamber in the first duration, including: collecting first dust data after the jet valve in each dust removal chamber completes the jet action for the fourth duration at every third duration interval; drawing a first dust change curve based on the first dust data.

[0011] Optionally, the third duration is 75 s to 85 s; and / or, the fourth duration is 25 s to 30 s.

[0012] Optionally, the air inlet of each row of filter bags is connected to the compressed air main pipe through a jet valve; draw a second dust change curve that can reflect the change of dust data when each row of filter bags in the target dust removal chamber works, including: collecting second dust data in the target dust removal chamber at every fifth duration interval; collecting time data of each jet valve action within the second duration; drawing a second dust change curve based on the second dust data and the time data.

[0013] Optionally, the fifth duration is 1 s to 5 s.

[0014] Optionally, confirm the dust situation in each dust removal chamber according to the first dust change curve, including: when there is a curve segment in the first dust change curve of the current dust removal chamber with a set number exceeding the dust threshold, confirm that there is dust leakage in the current dust removal chamber; when the first dust change curve of the current dust removal chamber is lower than the dust threshold, confirm that there is no dust leakage in the current dust removal chamber.

[0015] Optionally, determine the row of filter bags with leakage in the target dust removal chamber according to the second dust change curve, including: determining the jet valve corresponding to the curve segment exceeding the dust threshold in the second dust change curve, and determining the jet valve as the target jet valve; determining the row of filter bags connected to the target jet valve as the row of filter bags with leakage.

[0016] Optionally, the filter bag leak detection method further includes: collecting the flow data of the compressed air main pipe in each dust removal chamber and the action signal data of each jet valve; determining the fault condition of the jet valve in the dust removal chamber according to the flow data and the action signal data.

[0017] Optionally, the cloth bag leak detection method further includes: collecting the first pressure data of the negative pressure pipe in the clean gas chamber and the second pressure data of the negative pressure pipe in the dust gas chamber after the fourth time period when the injection valve in each dust removal chamber completes the injection action; calculating the current pressure difference between the second pressure data and the first pressure data; calculating the pressure difference between the current pressure difference and the initial pressure difference, and determining that the cloth bag in the dust removal chamber is blocked when the pressure difference is greater than the product of the set coefficient and the initial pressure difference.

[0018] In some embodiments, the dust collector system includes a plurality of dust removal chambers, each dust removal chamber includes a clean gas chamber and a dust gas chamber, and multiple rows of cloth bags are arranged in the clean gas chamber. The cloth bag leak detection device for the dust collector system includes: a drawing module configured to draw a first dust change curve of each dust removal chamber in the dust collector system in the first time period; a confirmation module configured to confirm the dust condition in each dust removal chamber according to the first dust change curve; the drawing module is further configured to determine the current dust removal chamber as the target dust removal chamber when there is dust leakage in the current dust removal chamber, and draw a second dust change curve that can reflect the change of dust data when each row of cloth bags in the target dust removal chamber works in the second time period; the confirmation module is further configured to determine the row of cloth bags with leakage in the target dust removal chamber according to the second dust change curve.

[0019] In some embodiments, the cloth bag leak detection device for the dust collector system includes a processor and a memory storing program instructions, and the processor is configured to be able to execute the cloth bag leak detection method for the dust collector system as described above.

[0020] In some embodiments, the dust collector system includes: a plurality of dust removal chambers, each dust removal chamber includes a clean gas chamber and a dust gas chamber, and multiple rows of cloth bags are arranged in the clean gas chamber; the air inlet of each row of cloth bags is connected to the compressed air main pipe through an injection valve; the cloth bag leak detection device for the dust collector system as described above is installed on the box body of any one of the dust removal chambers.

[0021] The cloth bag leak detection method, device, and dust collector system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0022] In the embodiments of the present disclosure, it is possible to detect whether there is a dust leakage in a dust removal box in the dust removal system based on the first dust change curve of each dust removal box in the first time period. In this way, the detection of whether there is a bag leakage in the dust removal system is realized. When it is determined that there is a dust leakage in a dust removal box, it is possible to determine the row of bags with leakage in the dust removal box based on the second dust change curve that can reflect the change of dust data during the operation of each row of bags in the dust removal box within the second time period. In this way, the accurate positioning of the leaking bags is realized, and the difficulty of manually checking and repairing the leaking bags is reduced. It can be seen that the method for detecting bag leakage in a dust removal system provided by the embodiments of the present disclosure can automatically detect whether there is a leakage in the bags of the dust removal system and can accurately locate the leaking bags.

[0023] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0025] Figure 1 is a schematic diagram of a dust removal system provided by an embodiment of the present disclosure, which only shows one dust removal box;

[0026] Figure 2 is a schematic diagram of a method for detecting bag leakage in a dust removal system provided by an embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram of a first dust change curve provided by an embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of a second dust change curve provided by an embodiment of the present disclosure;

[0029] Figure 5 is a schematic diagram of another second dust change curve provided by an embodiment of the present disclosure;

[0030] Figure 6 is a schematic diagram of a device for detecting bag leakage in a dust removal system provided by an embodiment of the present disclosure;

[0031] Figure 7 is a schematic diagram of another device for detecting bag leakage in a dust removal system provided by an embodiment of the present disclosure.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS:

[0033] 10. Dust removal system;

[0034] 100. Dust removal box body; 110. Clean gas chamber; 111. Filter bag; 112. Pulse valve; 120. Dust gas chamber; 130. Flowmeter; 140. Dust detector; 150. Manometer;

[0035] 200. Desulfurization tower;

[0036] 300. To the fluorinated alumina bin;

[0037] 600 (700). Filter bag leak detection device for the dust removal system; 601. Drawing module; 602. Confirmation module; 701. Processor; 702. Memory; 703. Communication interface; 704. Bus. Detailed implementation manners

[0038] In order to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and explanation purposes and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, sufficient understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0039] In the embodiments of the present disclosure, terms such as "first", "second", etc. in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0040] Unless otherwise specified, the term "a plurality of" features means two or more.

[0041] In the embodiments of the present disclosure, the character " / " feature means that the front and rear objects are in an "or" relationship. For example, the A / B feature means: A or B.

[0042] The term "and / or" is a description of the association relationship of an object, and the feature means that three relationships can exist. For example, A and / or B, the feature means: A or B, or, these three relationships of A and B.

[0043] The term "correspond to" can refer to an association relationship or a binding relationship. A corresponding to B means that there is an association relationship or a binding relationship between A and B.

[0044] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments may be combined with each other.

[0045] The dust collector system 10 provided by the embodiments of the present disclosure is as Figure 1 shown. The dust collector system 10 includes a plurality of dust collection boxes 100 and a bag leak detection device 600 (700) for the dust collector system. Only one dust collection box 100 is schematically shown. Figure 1 Only one dust collection box 100 is schematically shown.

[0046] Specifically, each dust collection box 100 includes a clean gas chamber 110 and a dust gas chamber 120. A plurality of rows of filter bags 111 are arranged in the clean gas chamber 110; the air inlet of each row of filter bags 111 is connected to the compressed air main pipe through a pulse valve 112; a flow meter 130 is arranged in the compressed air main pipe for detecting the flow data of the compressed air main pipe. The bag leak detection device 600 (700) for the dust collector system is installed on the box body of any one of the dust collection boxes 100.

[0047] Optionally, the dust collector system 10 further includes a desulfurization tower 200. The desulfurization tower 200 is communicated with the clean gas chamber 110 through a pipeline, and a dust detection element 140 is arranged in the pipeline. The dust detection element 140 is used for detecting the dust data in the dust collection box 100.

[0048] Optionally, the dust collector system 10 further includes a to-carrier fluorinated alumina bin 300. The to-carrier fluorinated alumina bin 300 is communicated with the dust gas chamber 120 through a pipeline for recovering the alumina after reacting with the flue gas.

[0049] Optionally, the dust collector system 10 further includes a pressure gauge 150. The pressure gauge 150 is connected to the negative pressure pipelines of the clean gas chamber 110 and the dust gas chamber 120 for detecting the pressure data of the negative pressure pipelines of the clean gas chamber 110 and the dust gas chamber 120.

[0050] Optionally, the bag leak detection device for the dust collector system includes a processor. The processor can, at regular intervals, draw a first dust change curve of each dust collection box in the dust collector system within the first time period based on the collected dust data in the dust collection box. The dust condition in each dust collection box can be confirmed according to the first dust change curve. In the case of dust leakage in the current dust collection box, the processor can draw a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the current dust collection box within the second time period, and determine the row of filter bags with leakage in the target dust collection box according to the second dust change curve.

[0051] Combined with the above dust collector system, the embodiments of the present disclosure provide a bag leak detection method for a dust collector system, as Figure 2 shown. The bag leak detection method includes:

[0052] S201, the processor plots the first dust change curve of each dust removal box in the dust removal system for the first time period.

[0053] Specifically, in the connecting pipeline between the clean gas chamber and the desulfurization tower, a dust detection component is provided. The processor can periodically collect the dust data in the dust removal box through this dust detection component. After the duration of collecting the dust data reaches the first time period, the first dust change curve can be generated with the dust data as the vertical axis and the time data as the horizontal axis.

[0054] Specifically, the dust data is the concentration of dust in the connecting pipeline between the clean gas chamber and the desulfurization tower.

[0055] Specifically, since only the dust data at a certain time point in the dust removal box is collected to judge whether there is dust leakage in the dust removal box, the risk of misjudgment is relatively high. Therefore, in the embodiment of the present disclosure, the first dust change curve of the dust removal box for the first time period is plotted. In this way, the risk of misjudging the existence of dust leakage in the dust removal box in the subsequent process is reduced.

[0056] Optionally, the first time period is 180 min to 200 min.

[0057] Optionally, the air inlet of each row of filter bags is connected to the compressed air main pipe through a spray valve; plotting the first dust change curve of each dust removal box in the dust removal system includes: collecting the first dust data in each dust removal box after the fourth time period when the spray valve completes the spraying action at every third time period; plotting the first dust change curve according to the first dust data.

[0058] Specifically, since the first dust change curve is plotted to preliminarily judge whether there is dust leakage in the dust removal box, it is sufficient to collect the first dust data in each dust removal box at a relatively long interval.

[0059] Optionally, the third time period is 75 s to 85 s.

[0060] Specifically, after the fourth time period when the spray valve completes the spraying action, the spray valve has been completely closed, which will not cause fluctuations in the dust data, and the dust fluctuations caused by spraying have also tended to be stable. Therefore, the processor collects the first dust data after the fourth time period when the spray valve completes the spraying action. In this way, the accuracy of the collected first dust data is improved.

[0061] Specifically, multiple rows of filter bags in the dust removal box work sequentially. Whether each row of filter bags works is controlled by the pulse valve connected to it. The duration of the pulse valve acting for pulse blowing is usually about 0.4 s, and the interval between the actions of two pulse valves is usually 40 s to 45 s. Therefore, the fourth duration can be set to 25 s to 30 s, and specifically can be set to 30 s. Specifically, setting the fourth duration to 30 s can ensure that the pulse valve has been completely closed, and the dust fluctuation caused by pulse blowing has tended to be stable.

[0062] S202. The processor confirms the dust situation in each dust removal box according to the first dust change curve.

[0063] Specifically, based on the first dust change curve, the change situation of the dust concentration in each dust removal box within a period of time (i.e., the first duration) can be determined. If the dust concentration continuously exceeds the dust threshold within this period of time, it indicates that there is a dust leakage situation in the dust removal box. Therefore, the processor can confirm whether there is a dust leakage situation in each dust removal box according to the first dust change curve.

[0064] Optionally, confirming the dust situation in each dust removal box according to the first dust change curve includes: when there are set number of curve segments exceeding the dust threshold in the first dust change curve of the current dust removal box, confirming that there is dust leakage in the current dust removal box; when the first dust change curve of the current dust removal box is lower than the dust threshold, confirming that there is no dust leakage in the current dust removal box.

[0065] Specifically, if there are set number of curve segments exceeding the dust threshold in the first dust change curve of the current dust removal box, it indicates that the dust concentration in the current dust removal box is higher than the normal dust concentration for most of the first duration. Therefore, in this case, it can be determined that there is dust leakage in the current dust removal box.

[0066] Specifically, if the first dust change curve of the current dust removal box is lower than the dust threshold, it indicates that the dust concentration in the current dust removal box is within the range of the normal dust concentration during the first duration. Therefore, in this case, it can be determined that there is no dust leakage in the current dust removal box.

[0067] Optionally, the dust threshold includes a first dust threshold and a second dust threshold, and the first dust threshold is less than the second dust threshold.

[0068] Specifically, in the first dust change curve of the current dust removal box, when there is a curve segment with a set number exceeding the first dust threshold and no curve segment exceeding the second dust threshold, it is confirmed that the current dust removal box has a mild dust leakage, and a warning signal is sent to the maintenance personnel; when there is a curve segment with a set number exceeding the second dust threshold in the first dust change curve of the current dust removal box, it is confirmed that the current dust removal box has a severe dust leakage, and the current dust removal box is isolated, that is, the current dust removal box is removed from the dust removal system.

[0069] Optionally, the first dust threshold is 20 mg / m 3 to 25 mg / m 3 , and the second dust threshold is 45 mg / m 3 to 50 mg / m 3 .

[0070] Specifically, under normal circumstances, the dust concentration in the dust removal box is around 10 mg / m 3 , so the first dust threshold can be set to 20 mg / m 3 to 25 mg / m 3 , and the second dust threshold is set to 45 mg / m 3 to 50 mg / m 3 .

[0071] Exemplarily, the first dust change curve is as Figure 3 shown. Figure 3 The first dust change curves in the No. 1 dust removal box, No. 2 dust removal box, and No. 3 dust removal box are shown. According to Figure 3 it can be seen that the first dust change curve of the No. 1 dust removal box is lower than the first dust threshold. In this case, it can be determined that there is no dust leakage in the No. 1 dust removal box. The first dust change curves of the No. 2 dust removal box are all higher than the first dust threshold and lower than the second dust threshold. In this case, it can be confirmed that the No. 2 dust removal box has a mild dust leakage and the maintenance personnel need to be notified for treatment. Most of the curve segments in the first dust change curve of the No. 2 dust removal box exceed the second dust threshold. In this case, it can be confirmed that the No. 3 dust removal box has a severe dust leakage and the current dust removal box needs to be isolated.

[0072] S203. When there is dust leakage in the current dust removal box, the processor determines the current dust removal box as the target dust removal box and draws a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the target dust removal box within the second time period;

[0073] Specifically, if there is dust leakage in the current dust removal box, it indicates that there are leaking filter bags in the current dust removal box. Therefore, in this case, the current dust removal box needs to be determined as the target dust removal box for detecting the position of the leaking filter bags.

[0074] Specifically, after the dust removal box is confirmed as the target dust removal box, it is necessary to draw a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the target dust removal box within the second time period. Specifically, the processor can periodically collect the dust data in the dust removal box through the dust detection component arranged in the communication pipeline between the clean gas chamber and the desulfurization tower. Since multiple rows of filter bags in the dust removal box work sequentially, whether each row of filter bags works is controlled by the blow valve connected to it. Therefore, according to time, the dust data when each row of filter bags works can be distinguished from the dust data in the dust removal box. Therefore, the processor can draw a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the target dust removal box within the second time period.

[0075] Specifically, since it is impossible to determine which row of filter bags in the dust removal box has a leak only by collecting the dust data at a certain time point in the dust removal box, in the embodiments of the present disclosure, a second dust change curve of the dust removal box within the second time period is drawn, and it is necessary to ensure that the second time period is longer than the total operation time of all rows of filter bags in the dust removal box. In this way, the risk of misjudging the leaking row of filter bags in the follow-up is reduced.

[0076] Optionally, the second time period is 20 min to 30 min.

[0077] Optionally, the air inlet of each row of filter bags is connected to the compressed air main pipe through a blow valve; drawing a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the target dust removal box includes: collecting the second dust data in the target dust removal box at every fifth time period; collecting the time data of the action of each blow valve within the second time period; and drawing a second dust change curve according to the second dust data and the time data.

[0078] Specifically, since the second dust change curve is drawn to accurately judge the leaking row of filter bags in the target dust removal box, it is necessary to collect the second dust data in each dust removal box at a relatively short time interval to reduce the risk that the drawn second dust change curve is discontinuous and causes misjudgment of the leaking row of filter bags.

[0079] Optionally, the fifth time period is 1 s to 5 s.

[0080] Specifically, by collecting the time data of the action of each blow valve within the second time period, the data corresponding to each blow valve in the second dust data can be determined, so that the dust data corresponding to each row of filter bags can be determined.

[0081] Specifically, taking time as the horizontal axis and dust data as the vertical axis, adding the second dust data to the coordinate system, and standardizing the curve segments corresponding to each row of filter bags according to the time data of the action of each blow valve, the second dust change curve can be obtained.

[0082] S204. The processor determines the leaking filter bag row in the target dust removal box according to the second dust change curve.

[0083] Specifically, based on the second dust change curve, it can be determined in which working stage of which row of filter bags the dust concentration in the target dust removal box suddenly rises, so that the leaking filter bag row in the target dust removal box can be determined.

[0084] Optionally, determining the leaking filter bag row in the target dust removal box according to the second dust change curve includes: determining the spray valve corresponding to the curve segment exceeding the dust threshold in the second dust change curve, and determining the spray valve as the target spray valve; determining the filter bag row connected to the target spray valve as the leaking filter bag row.

[0085] Specifically, if the curve segment exceeds the dust threshold, it indicates that due to the action of the spray valve corresponding to this curve segment, the dust concentration in the target dust removal box suddenly rises, indicating that the filter bag row connected to the spray valve leaks. Therefore, the spray valve can be determined as the target spray valve, and the filter bag row connected to the target spray valve can be determined as the leaking filter bag row.

[0086] Exemplarily, for the Figure 3 second change curves of dust removal box No. 2 and dust removal box No. 3 are respectively as Figure 4 and Figure 5 shown.

[0087] According to Figure 4 it can be seen that in dust removal box No. 2, when the row of filter bags connected to spray valve No. 1 and spray valve No. 4 works, there will be an obvious sudden rise in dust data. Therefore, it can be determined that there are leaking filter bags in filter bag row No. 1 and filter bag row No. 4 in dust removal box No. 2.

[0088] According to Figure 5 it can be seen that in dust removal box No. 3, when the row of filter bags connected to spray valve No. 6 and spray valve No. 8 works, there will be an obvious sudden rise in dust data. Therefore, it can be determined that there are leaking filter bags in filter bag row No. 6 and filter bag row No. 8 in dust removal box No. 3.

[0089] In the embodiments of the present disclosure, it is possible to detect whether there is a dust leakage in a dust removal box in the dust removal system based on the first dust change curve of each dust removal box in the dust removal system within the first time period. In this way, the detection of whether there is a bag leakage in the dust removal system is realized. When it is determined that there is a dust leakage in a dust removal box, it is possible to determine the row of bags with leakage in the dust removal box based on the second dust change curve that can reflect the change of dust data during the operation of each row of bags in the dust removal box within the second time period. In this way, the accurate positioning of the leaking bags is realized. It can be seen that the method for detecting bag leakage in the dust removal system provided by the embodiments of the present disclosure can detect whether there is a leakage in the bags in the dust removal system and can accurately locate the leaking bags.

[0090] In some embodiments, the method for detecting bag leakage in the dust removal system further includes: collecting the flow data of the compressed air main pipe in each dust removal box and the action signal data of each injection valve; determining the fault condition of the injection valve in the dust removal box according to the flow data and the action signal data.

[0091] Specifically, by collecting the flow data of the compressed air main pipe in each dust removal box and the action signal data of each injection valve, it can be determined whether the injection state of the determined injection valve is accurate, and thus it can be determined whether there is a fault in the injection valve.

[0092] In the embodiments of the present disclosure, by collecting the flow data of the compressed air main pipe in each dust removal box and the action signal data of each injection valve, the determination of whether there is a fault in the injection valve is realized. In this way, the risk of misjudging the row of bags with leakage in the dust removal box based on the above first dust change curve and second dust change curve due to the failure of the injection valve is reduced.

[0093] In some embodiments, the method for detecting bag leakage in the dust removal system further includes: collecting the first pressure data of the negative pressure pipe in the clean gas chamber and the second pressure data of the negative pressure pipe in the dust gas chamber after the injection valve in each dust removal box completes the injection action for the fourth time period; calculating the current pressure difference between the second pressure data and the first pressure data; calculating the pressure difference between the current pressure difference and the initial pressure difference, and determining that there is a blockage in the bags in the dust removal box when the pressure difference is greater than the product of the set coefficient and the initial pressure difference.

[0094] Specifically, the initial pressure difference is the pressure difference between the pressure of the negative pressure pipe in the dust gas chamber and the pressure of the negative pressure pipe in the clean gas chamber when new bags are replaced, the system runs stably and alumina is not input.

[0095] Specifically, both the negative pressure pipe in the clean gas chamber and the negative pressure pipe in the dust gas chamber are connected to a pressure gauge. Therefore, the processor can detect the first pressure data of the negative pressure pipe in the clean gas chamber and the second pressure data of the negative pressure pipe in the dust gas chamber through the pressure gauge.

[0096] Specifically, by determining the pressure difference between the negative pressure pipe of the dust chamber and the negative pressure pipe of the clean gas chamber, it is possible to determine whether the air permeability of the filter bag is good. Therefore, it is necessary to calculate the current pressure difference between the second pressure data and the first pressure data.

[0097] Specifically, by comparing the current pressure difference with the initial pressure difference, it is possible to determine the change in the air permeability of the current filter bag compared to that of a new filter bag. Therefore, it is necessary to calculate the pressure difference between the current pressure difference and the initial pressure difference, and compare the pressure difference with the product of the set coefficient and the initial pressure difference to determine whether there is a blockage in the filter bag inside the dust removal box.

[0098] Optionally, the set coefficient includes a first set coefficient and a second set coefficient; when the pressure difference is greater than the product of the first set coefficient and the initial pressure difference and less than the product of the second set coefficient and the initial pressure difference, it is determined that there is a slight blockage in the filter bag inside the dust removal box; when the pressure difference is greater than or equal to the product of the second set coefficient and the initial pressure difference, it is determined that there is a slight blockage in the filter bag inside the dust removal box.

[0099] Optionally, the first set coefficient is 40% to 60%, such as 50%; the second set coefficient is 80% to 100%, such as 100%.

[0100] In the embodiments of the present disclosure, by determining the current pressure difference between the negative pressure pipe of the clean gas chamber and the negative pressure pipe of the dust chamber after the fourth duration of the spraying valve in each dust removal box completes the spraying action, and comparing the current pressure difference with the initial pressure difference, the detection of whether there is a blockage in the filter bag inside the dust removal box is realized. In this way, when it is determined that there is a blockage in the filter bag inside the dust removal box, the maintenance personnel can be reminded in time for maintenance, reducing the waste of fluoride resources caused by the blockage of the filter bag.

[0101] In some embodiments, it is also possible to collect the current pressure difference between the negative pressure pipe of the clean gas chamber and the negative pressure pipe of the dust chamber after the fourth duration of the spraying valve in each dust removal box completes the spraying action within a period of time (for example, the sixth duration), and analyze the downward trend of the current pressure difference or confirm whether there is a sudden drop in the current pressure difference to confirm whether there is a leakage in the filter bag inside each dust removal box.

[0102] Combined with Figure 6As shown, an embodiment of the present disclosure provides a cloth bag leak detection device 600 for a dust collector system, including: a drawing module 601 and a confirmation module 602. The drawing module 601 is configured to draw a first dust change curve of each dust removal box in the dust collector system within a first time period. The confirmation module 602 is configured to confirm the dust condition in each dust removal box according to the first dust change curve. The drawing module 601 is further configured to, when there is dust leakage in the current dust removal box, determine the current dust removal box as the target dust removal box, and draw a second dust change curve that can reflect the change of dust data during the operation of each row of cloth bags in the target dust removal box within a second time period. The confirmation module 602 is further configured to determine the row of cloth bags with leakage in the target dust removal box according to the second dust change curve.

[0103] In some embodiments, the air inlet of each row of cloth bags is connected to the compressed air main pipe through a blow valve; the drawing module 601 is specifically configured to collect first dust data in each dust removal box after the blow valve completes the blowing action for a fourth time period at every third time interval; and draw a first dust change curve according to the first dust data.

[0104] In some embodiments, the air inlet of each row of cloth bags is connected to the compressed air main pipe through a blow valve; the drawing module 601 is specifically configured to collect second dust data in the target dust removal box at every fifth time interval; collect the time data of the action of each blow valve within the second time period; and draw a second dust change curve according to the second dust data and the time data.

[0105] In some embodiments, the confirmation module 602 is specifically configured to confirm that there is dust leakage in the current dust removal box when there is a curve segment in the first dust change curve of the current dust removal box whose set quantity exceeds the dust threshold; and confirm that there is no dust leakage in the current dust removal box when the first dust change curve of the current dust removal box is lower than the dust threshold.

[0106] In some embodiments, the confirmation module 602 is specifically configured to determine the blow valve corresponding to the curve segment exceeding the dust threshold in the second dust change curve, and determine the blow valve as the target blow valve; and determine the row of cloth bags connected to the target blow valve as the row of cloth bags with leakage.

[0107] In some embodiments, the cloth bag leak detection device 600 for a dust collector system further includes: a fault judgment module 603. The fault judgment module 603 is configured to collect the flow data of the compressed air main pipe in each dust removal box and the action signal data of each blow valve; and determine the fault condition of the blow valve in the dust removal box according to the flow data and the action signal data.

[0108] In some embodiments, the bag leak detection device 600 for a dust collector system further includes: a blockage determination module 604. The blockage determination module 604 is configured to collect the first pressure data of the negative pressure pipe in the clean gas chamber and the second pressure data of the negative pressure pipe in the dust gas chamber after the fourth duration of the injection valve in each dust removal chamber completes the injection action; calculate the current pressure difference between the second pressure data and the first pressure data; calculate the pressure difference between the current pressure difference and the initial pressure difference, and determine that the bag in the dust removal chamber is blocked when the pressure difference is greater than the product of the set coefficient and the initial pressure difference.

[0109] Combined Figure 7 As shown, the embodiments of the present disclosure provide a bag leak detection device 700 for a dust collector system. The bag leak detection device 700 for a dust collector system includes: a processor 701 and a memory 702. Optionally, the device may further include a communication interface 703 and a bus 704. Among them, the processor 701, the communication interface 703, and the memory 702 can communicate with each other through the bus 704. The communication interface 703 can be used for information transmission. The processor 701 can call the logical instructions in the memory 702 to execute the bag leak detection method for the dust collector system in the above embodiments.

[0110] In addition, when the logical instructions in the above-mentioned memory 702 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0111] The memory 702, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 701 executes functional applications and data processing by running the program instructions / modules stored in the memory 702, that is, implements the bag leak detection method for the dust collector system in the above embodiments.

[0112] The memory 702 may include a storage program area and a storage data area. Among them, the storage program area can store an operating system and application programs required for at least one function; the storage data area can store data created according to the use of the terminal device. In addition, the memory 702 may include a high-speed random access memory and may also include a non-volatile memory.

[0113] The embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are set to execute the above-mentioned bag leak detection method for a dust collector system.

[0114] The technical solution of the embodiments of the present disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc, etc., which are various media that can store program codes.

[0115] The above description and the drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments merely represent possible variations. Unless explicitly required, separate components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. Moreover, the terms used in this application are only for describing the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groupings of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, or device including the element. In this document, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, the relevant parts may refer to the description of the method part.

[0116] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to achieve the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0117] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division, and 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. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, in the embodiments of the present disclosure, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0118] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of code, or a part thereof, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. Each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting air leakage of filter bags in a dust collector system, the dust collector system comprising a plurality of dust removal chambers, each dust removal chamber including a clean gas chamber and a dirty gas chamber, wherein multiple rows of filter bags are arranged in the clean gas chamber, and the air inlet of each row of filter bags is connected to a compressed air main pipe through a spray valve; characterized in that, The cloth bag leak detection method includes: Collecting first dust data in each dust removal chamber after the fourth time period of the blowing valve in the chamber completing the blowing action at every third time interval; Drawing a first dust change curve of each dust removal chamber in the dust collector system at the first time period according to the first dust data; Confirming the dust condition in each dust removal chamber according to the first dust change curve; Confirming the dust condition in each dust removal chamber according to the first dust change curve, including: when there is a curve segment with a set number exceeding the dust threshold in the first dust change curve of the current dust removal chamber, confirming that there is dust leakage in the current dust removal chamber; When there is dust leakage in the current dust removal chamber, determining the current dust removal chamber as the target dust removal chamber and drawing a second dust change curve that can reflect the change of dust data when each row of cloth bags in the target dust removal chamber works within the second time period; Determining the row of cloth bags with leakage in the target dust removal chamber according to the second dust change curve; 2. The cloth bag leak detection method according to claim 1, characterized in that, The air inlet of each row of cloth bags is connected to the compressed air main pipe through a blowing valve; Drawing a second dust change curve that can reflect the change of dust data when each row of cloth bags in the target dust removal chamber works, including: Collecting second dust data in the target dust removal chamber at every fifth time interval; Collecting the time data of each blowing valve action within the second time period; Drawing a second dust change curve according to the second dust data and the time data; 3. The cloth bag leak detection method according to claim 1 or 2, characterized in that, Confirming the dust condition in each dust removal chamber according to the first dust change curve, further including: When the first dust change curve of the current dust removal chamber is lower than the dust threshold, confirming that there is no dust leakage in the current dust removal chamber; 4. The cloth bag leak detection method according to claim 1 or 2, characterized in that, Determining the row of cloth bags with leakage in the target dust removal chamber according to the second dust change curve, including: Determining the blowing valve corresponding to the curve segment exceeding the dust threshold in the second dust change curve and determining the blowing valve as the target blowing valve; Determining the row of cloth bags connected to the target blowing valve as the row of cloth bags with leakage; 5. The leak detection method for cloth bags according to claim 1 or 2, characterized in that, Further including: Collecting the flow data of the compressed air main pipe in each dust removal chamber and the action signal data of each blowing valve; Determining the fault condition of the blowing valve in the dust removal chamber according to the flow data and the action signal data; 6. The cloth bag leak detection method according to claim 1 or 2, characterized in that Further including: Collecting the first pressure data of the negative pressure pipe in the clean gas chamber and the second pressure data of the negative pressure pipe in the dust gas chamber after the fourth time period of the blowing valve in each dust removal chamber completing the blowing action; Calculating the current pressure difference between the second pressure data and the first pressure data; Calculating the pressure difference between the current pressure difference and the initial pressure difference, and when the pressure difference is greater than the product of the set coefficient and the initial pressure difference, determining that the cloth bags in the dust removal chamber are blocked; 7. A cloth bag leak detection device for a dust collector system, characterized in that, The dust collector system includes a plurality of dust removal chambers, each dust removal chamber includes a clean gas chamber and a dust gas chamber, and multiple rows of cloth bags are arranged in the clean gas chamber. It is characterized in that the cloth bag leak detection device includes: A drawing module configured to collect first dust data in each dust removal chamber after the fourth time period of the blowing valve in the chamber completing the blowing action at every third time interval; and drawing a first dust change curve of each dust removal chamber in the dust collector system at the first time period according to the first dust data; A confirmation module configured to confirm the dust condition in each dust removal chamber according to the first dust change curve; The confirmation module is specifically configured to confirm the existence of dust leakage in the current dust removal box when there are curve segments in the first dust change curve of the current dust removal box whose set quantity exceeds the dust threshold; The drawing module is further configured to, when there is dust leakage in the current dust removal box, determine the current dust removal box as the target dust removal box and draw a second dust change curve that can reflect the change of dust data during the operation of each row of filter bags in the target dust removal box within the second time period; The confirmation module is further configured to determine the row of filter bags with leakage in the target dust removal box according to the second dust change curve.

8. A cloth bag leak detection device for a dust collector system, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to be capable of executing the method for detecting leakage of filter bags in a dust collector system according to any one of claims 1 to 6.

9. A dust collector system, characterized in that, Including: A plurality of dust removal boxes, each dust removal box includes a clean gas chamber and a dirty gas chamber, and multiple rows of filter bags are arranged in the clean gas chamber; the air inlet of each row of filter bags is connected to the compressed air main pipe through a pulse valve; The device for detecting leakage of filter bags in a dust collector system according to claim 7 or 8 is installed on the box body of any one of the dust removal boxes.

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