A coal mine dust filtering device and filtering method thereof

Abstract

The present invention discloses a filtering method for a filtering device of coal mine dust, comprising: obtaining initial dust data and filtering data of the coal mine by measuring with a dust concentration meter; performing periodic filtering in the coal mine based on a filtering signal; and obtaining node dust data; monitoring the periodic filtering process, and obtaining the node filtering data in the periodic filtering process by a flow meter, and calculating the node filtering penetration rate in the periodic filtering process based on the node dust data; calculating and obtaining the change rate of each node filtering penetration rate in the periodic filtering process; obtaining the node dust concentration change rate in the periodic filtering process in the coal mine; comparing the change rate of the filtering penetration rate with a preset change threshold; and comparing the node dust concentration change rate with a preset rate threshold at the same time; generating a prompt signal, which can effectively remind maintenance to ensure that the dust content in the air in the mine is not too high, and further ensure work safety.

Description

Technical Field

[0001] The invention relates to the technical field of dust filtering, and in particular to a coal mine dust filtering device and a filtering method thereof. Background Art

[0002] Mine ventilation refers to the input of fresh air into the mine to increase the oxygen concentration, so as to dilute and remove toxic and harmful gases and dust in the mine. The main function of mine ventilation is to supply enough fresh air underground to meet the oxygen needs of personnel, dilute the harmful gases and dust underground, ensure safe production, adjust the underground climate, and create a good working environment. However, most of the existing mine ventilation dust filter devices will have dust residue inside the filter device during long-term use, causing blockage of the air outlet of the filter device, reducing the use effect of the dust filter device. At the same time, the oxygen content in the air underground in the mine will gradually decrease, which is not conducive to the work of the mine staff and poses a hidden danger to the life safety of the staff;

[0003] Therefore, during the construction of coal mines, dust filtering and treatment is extremely important. The existing filtering devices cannot be adjusted according to the dust content in the mine, and cannot remind workers to inspect, clean or replace the filtering devices after working for a long time, which is prone to safety hazards. Summary of the invention

[0004] The object of the present invention is to provide a coal mine dust filtering device and a filtering method thereof to solve the above-mentioned background problems.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A filtering method of a coal mine dust filtering device, comprising:

[0007] S1: Obtaining the initial dust data and filtration data of the coal mine, including the internal dust concentration value Fnb, by measuring with a dust concentration meter; comparing the initial internal dust concentration value Fnb with the preset dust concentration value Fy;

[0008] If the initial internal dust concentration value Fnb is less than the preset dust concentration value Fy, a state stability signal is generated;

[0009] If the initial internal dust concentration value Fnb ≥ the preset dust concentration value Fy, a filtering signal is generated;

[0010] S2: Based on the filtering signal, periodic filtering is performed in the coal mine shaft; and node dust data is obtained;

[0011] S3: monitor the periodic filtering process, obtain the node filtering data in the periodic filtering process through the flow meter, and calculate the node filtering penetration rate in the periodic filtering process based on the node dust data;

[0012] S4: Calculate and obtain the change rate of the filtration penetration rate of each node during the periodic filtration process; and simultaneously obtain the change rate of the dust concentration at the node during the periodic filtration process in the coal mine;

[0013] S5: Compare the change rate of the filtration penetration rate with the preset change threshold; at the same time, compare the change rate of the node dust concentration with the preset rate threshold; and generate a prompt signal.

[0014] As a further solution of the present invention: the dust data includes an inlet dust concentration value and an initial outlet dust concentration value;

[0015] In S2: the dust inside the mine is filtered in a time period T, and the period T is divided into unit time periods t; the dust data of each time node is obtained, including the dust concentration value at the node entrance and the dust concentration value at the node exit, and marked as Fcr respectively. n and Fck n .

[0016] As a further solution of the present invention: the filtering data includes an inlet gas flow rate and an outlet gas flow rate;

[0017] The filtering data of the periodic filtering process includes the node inlet gas flow Qr n and node outlet gas flow Qc n .

[0018] As a further solution of the present invention: the node filtering data is calculated in S3, and the node filtering penetration rate CT is calculated based on the node dust data. n The formula is:

[0019] As a further solution of the present invention: the calculation formula of the change rate Jbh of the node filtering penetration rate is: Among them, n≥2.

[0020] As a further solution of the present invention: the step of obtaining the node dust concentration change rate Fcbh includes:

[0021] V1: Obtain the dust concentration value in the coal mine at each node moment during the periodic filtering process and mark it as Fnb n ;

[0022] V2: Calculate the node dust concentration change rate Fcbh; where, Among them, n≥2.

[0023] As a further solution of the present invention: in S5, the change rate of the filtration penetration rate is compared with the preset change threshold Jbhy; at the same time, the change rate of the node dust concentration is compared with the preset rate threshold Fcbhy:

[0024] If Jbh ≥ Jbhy, then a warning signal is generated;

[0025] If Jbh<Jbhy, and Fcbh≥Fcbhy; then generate a reminder signal;

[0026] If Jbh<Jbhy, and Fcbh<Fcbhy, then a working stable signal is generated.

[0027] As a further solution of the present invention: if an early warning signal is generated, the early warning device reminds the maintenance personnel to repair and replace the filter device; if a reminder signal is generated, the early warning device reminds the maintenance personnel to maintain and clean the filter device.

[0028] As a further solution of the present invention: a device for filtering coal mine dust adopts the above filtering method.

[0029] Beneficial effects of the present invention:

[0030] In the present invention, through the above technical scheme, the internal dust concentration value Fnb is first judged to determine whether the internal dust concentration value Fnb needs to be filtered. If filtering is not required, it means that the dust concentration Fnb in the internal air of the coal mine meets the standard and will not have any impact. If filtering is required, the filtering device is started to filter the air inside the coal mine. In addition, during the filtering process, the node filtering data and node dust data in the filtering process are monitored in real time, and the node filtering penetration rate is calculated to obtain the change rate of the filtering penetration rate of each node during the periodic filtering process. At the same time, the change rate of the node dust concentration during the periodic filtering process in the coal mine is obtained. Due to the filtering penetration rate The larger the value is, the worse the filtering effect is. Therefore, the rate of change of the filtration penetration rate is compared with the preset change threshold. If the rate of change of the filtration penetration rate is large, it means that the filtration penetration rate has increased, making the filtration effect worse. At the same time, the rate of change of the node dust concentration is compared with the preset rate threshold. If the node dust concentration is getting smaller and smaller, it means that the filtration effect is good. If the node dust concentration is getting larger and larger, it means that the dust concentration in the coal mine is increasing. It means that the filtration speed needs to be increased, or the filtration penetration rate needs to be reduced to improve the filtration effect and ensure the safety in the coal mine. It can effectively remind maintenance to ensure that the dust content in the air in the mine is not too high, further ensuring work safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 It is a schematic flow chart of the method of the present invention;

[0033] Figure 2 It is a schematic diagram of the system block diagram of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] See also Figure 1 As shown, the present invention is a filtering method of a coal mine dust filtering device, comprising:

[0037] S1: Obtaining the initial dust data and filtration data of the coal mine, including the internal dust concentration value Fnb, by measuring with a dust concentration meter; comparing the initial internal dust concentration value Fnb with the preset dust concentration value Fy;

[0038] The filtered data include inlet gas flow rate and outlet gas flow rate;

[0039] If the initial internal dust concentration value Fnb is less than the preset dust concentration value Fy, a state stability signal is generated;

[0040] If the initial internal dust concentration value Fnb ≥ the preset dust concentration value Fy, a filtering signal is generated;

[0041] By judging the internal dust concentration value Fnb, it is judged whether the internal dust concentration value Fnb needs to be filtered. If it does not need to be filtered, it means that the dust concentration Fnb in the internal air of the coal mine meets the standard and will not have any impact. If it needs to be filtered, the filtering device is started to filter the air inside the coal mine;

[0042] S2: Based on the filtering signal, periodic filtering is performed in the coal mine shaft; and node dust data is obtained; wherein the dust data includes the inlet dust concentration value and the initial outlet dust concentration value, and therefore, the node dust data is marked by the data in the periodic filtering process;

[0043] Specifically, the dust inside the mine is filtered in a time period T, and the period T is divided into unit time periods t; the dust data at each time node is obtained, including the dust concentration value at the node entrance and the dust concentration value at the node exit, and marked as Fcr respectively. n and Fck n ;

[0044] In addition, the filtering data of the periodic filtering process includes the node inlet gas flow Qr n and node outlet gas flow Qc n ;

[0045] S3: monitor the periodic filtering process, obtain the node filtering data in the periodic filtering process through the flow meter, and calculate the node filtering penetration rate in the periodic filtering process based on the node dust data;

[0046] S4: Calculate and obtain the change rate of the filtration penetration rate of each node during the periodic filtration process; and simultaneously obtain the change rate of the dust concentration at the node during the periodic filtration process in the coal mine;

[0047] S5: Compare the change rate of the filtration penetration rate with the preset change threshold; at the same time, compare the change rate of the node dust concentration with the preset rate threshold; and generate a prompt signal.

[0048] Through the above technical solution, the internal dust concentration value Fnb is first judged to determine whether the internal dust concentration value Fnb needs to be filtered. If filtering is not required, it means that the dust concentration Fnb in the internal air of the coal mine meets the standard and will not have any impact. If filtering is required, the filtering device is started to filter the air inside the coal mine.

[0049] In addition, during the filtering process, the node filtering data and node dust data in the filtering process are monitored in real time, and the node filtering penetration rate is calculated, and then the change rate of the filtering penetration rate of each node in the periodic filtering process is calculated; at the same time, the change rate of the node dust concentration in the periodic filtering process in the coal mine is obtained; since the larger the filtering penetration rate, the worse the filtering effect, the change rate of the filtering penetration rate is compared with the preset change threshold; if the change rate of the filtering penetration rate is large, it means that the filtering penetration rate has increased, making the filtering effect worse; at the same time, the change rate of the node dust concentration is compared with the preset rate threshold, if the node dust concentration is getting smaller and smaller, it means that the filtering effect is good, if the node dust concentration is getting larger and larger, it means that the dust concentration in the coal mine is increasing, which means that the filtering speed needs to be increased, or the filtering penetration rate needs to be reduced to improve the filtering effect and ensure the safety in the coal mine;

[0050] Embodiment 2

[0051] Based on the above embodiment, the present embodiment provides the following technical solutions: for calculating the change rate of the filter penetration rate of each node during the periodic filtering process and the change rate of the dust concentration of the node during the periodic filtering process in the coal mine, and then comparing the change rate of the filter penetration rate with the preset change threshold; at the same time, comparing the change rate of the node dust concentration with the preset rate threshold; generating a prompt signal;

[0052] Specific:

[0053] W1: Calculate the node filter penetration rate CT based on the node dust data n The formula is:

[0054] W2: The calculation formula of the change rate of node filtering penetration rate Jbh is: Where n≥2;

[0055] W3: Obtain the dust concentration value in the coal mine at each node moment during the periodic filtering process and mark it as Fnb n ;

[0056] W4: Calculate the node dust concentration change rate Fcbh; where, Where n≥2;

[0057] W5: Compare the change rate of the filter penetration rate with the preset change threshold Jbhy; at the same time, compare the change rate of the node dust concentration with the preset rate threshold Fcbhy:

[0058] W6: If Jbh ≥ Jbhy, then generate a warning signal;

[0059] If Jbh<Jbhy, and Fcbh≥Fcbhy; then generate a reminder signal;

[0060] If Jbh<Jbhy, and Fcbh<Fcbhy, then a working stable signal is generated;

[0061] W7: If an early warning signal is generated, the early warning device will remind the maintenance personnel to repair and replace the filter device; if a reminder signal is generated, the early warning device will remind the maintenance personnel to maintain and clean the filter device.

[0062] By comparing the change rate of the filtration penetration rate with the preset change threshold; if the change rate of the filtration penetration rate is large, it means that the filtration penetration rate has increased, making the filtration effect worse; at the same time, the node dust concentration change rate is compared with the preset rate threshold. If the node dust concentration is getting smaller and smaller, it means that the filtration effect is good. If the node dust concentration is getting larger and larger, it means that the dust concentration in the coal mine is increasing, which means that the filtration speed needs to be increased, or the filtration penetration rate needs to be reduced to improve the filtration effect and ensure the safety in the coal mine. It can effectively remind maintenance to ensure that the dust content in the air in the mine is not too high, further ensuring work safety.

[0063] Embodiment 3

[0064] A coal mine dust filtering device, the coal mine dust filtering device adopts the technical solution of the above-mentioned embodiment 1 and / or embodiment 2;

[0065] Embodiment 4:

[0066] like Figure 2 As shown, based on the above technical solution, this embodiment also proposes a filtering system suitable for the filtering device of coal mine dust in embodiment 3, including:

[0067] Data acquisition module: used to obtain the initial dust data and filtering data of the coal mine, including the internal dust concentration value Fnb; compare the initial internal dust concentration value Fnb with the preset dust concentration value Fy;

[0068] The filtered data include inlet gas flow rate and outlet gas flow rate;

[0069] Get the node filtering data during the periodic filtering process;

[0070] Data determination module: used to determine the internal dust concentration value Fnb, if the initial internal dust concentration value Fnb < the preset dust concentration value Fy; then generate a state stability signal;

[0071] If the initial internal dust concentration value Fnb ≥ the preset dust concentration value Fy, a filtering signal is generated;

[0072] Data processing module: used to calculate the node filtering penetration rate during the periodic filtering process;

[0073] It is used to calculate the change rate of the filter penetration rate of each node during the periodic filtering process; at the same time, it is used to obtain the change rate of the dust concentration of the node during the periodic filtering process in the coal mine;

[0074] Control module: used to compare the change rate of the filtration penetration rate with the preset change threshold; at the same time, compare the change rate of the node dust concentration with the preset rate threshold; and generate a prompt signal.

[0075] Working principle of the present invention:

[0076] The initial dust data of the coal mine is obtained by measuring with a dust concentration meter, and the initial internal dust concentration value Fnb is compared with the preset dust concentration value Fy; if the initial internal dust concentration value Fnb is less than the preset dust concentration value Fy, a state stability signal is generated; if the initial internal dust concentration value Fnb is greater than or equal to the preset dust concentration value Fy, a filtering signal is generated;

[0077] Calculate the node filtration penetration rate CT based on the node dust data n And the rate of change of the node filter penetration rate Jbh; obtain the dust concentration value in the coal mine at each node moment in the periodic filtration process, and calculate the node dust concentration change rate Fcbh; compare the change rate of the filter penetration rate with the preset change threshold Jbhy; at the same time, compare the node dust concentration change rate with the preset rate threshold Fcbhy: if an early warning signal is generated, the early warning device is used to remind the maintenance personnel to repair and replace the filter device; if a reminder signal is generated, the early warning device is used to remind the maintenance personnel to maintain and clean the filter device.

[0078] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A filtering method for a coal mine dust filtering device, characterized in that: include: S1: Obtaining the initial dust data and filtration data of the coal mine, including the internal dust concentration value Fnb, by measuring with a dust concentration meter; comparing the initial internal dust concentration value Fnb with the preset dust concentration value Fy; If the initial internal dust concentration value Fnb is less than the preset dust concentration value Fy, a state stability signal is generated; If the initial internal dust concentration value Fnb ≥ the preset dust concentration value Fy, a filtering signal is generated; S2: Based on the filtering signal, periodic filtering is performed in the coal mine shaft; and node dust data is obtained; S3: monitor the periodic filtering process, obtain the node filtering data in the periodic filtering process through the flow meter, and calculate the node filtering penetration rate in the periodic filtering process based on the node dust data; S4: Calculate and obtain the change rate of the filtration penetration rate of each node during the periodic filtration process; and simultaneously obtain the change rate of the dust concentration at the node during the periodic filtration process in the coal mine; S5: Compare the change rate of the filtration penetration rate with a preset change threshold; and at the same time, compare the change rate of the node dust concentration with a preset rate threshold; generating a prompt signal; The initial dust data includes an inlet dust concentration value and an initial outlet dust concentration value; In S2: the dust inside the mine is filtered in a time period T, and the period T is divided into unit time periods t; the dust data of each time node is obtained, including the dust concentration value at the node entrance and the dust concentration value at the node exit, and marked as Fcr respectively. n and Fck n ; The filtering data includes an inlet gas flow rate and an outlet gas flow rate; The filtering data of the periodic filtering process includes the node inlet gas flow Qr n and node outlet gas flow Qc n ; In S3, the node filtering data is calculated, and the node filtering penetration rate CT is calculated based on the node dust data. n The formula is: ; The calculation formula of the change rate Jbh of the node filtering penetration rate is: ; Where n≥2; The step of obtaining the node dust concentration change rate Fcbh comprises: V1: Obtain the dust concentration value in the coal mine at each node moment during the periodic filtering process and mark it as Fnb n ; V2: Calculate the node dust concentration change rate Fcbh; where, ; Where n≥2; In S5, the change rate of the filtration penetration rate is compared with the preset change threshold Jbhy; at the same time, the change rate of the node dust concentration is compared with the preset rate threshold Fcbhy.

2. The filtering method of a coal mine dust filtering device according to claim 1, characterized in that: If Jbh ≥ Jbhy, then a warning signal is generated; If Jbh<Jbhy, and Fcbh≥Fcbhy; then generate a reminder signal; If Jbh<Jbhy, and Fcbh<Fcbhy, then a working stable signal is generated.

3. The filtering method of a coal mine dust filtering device according to claim 2, characterized in that: If an early warning signal is generated, the early warning device will remind the maintenance personnel to repair and replace the filter device; if a reminder signal is generated, the early warning device will remind the maintenance personnel to maintain and clean the filter device.

4. A coal mine dust filtering device, characterized in that: The invention comprises the filtering method according to any one of claims 1 to 3.

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