Intelligent sorting system

Abstract

The invention relates to the technical field of underground lump coal gangue discharging and sorting, and discloses an intelligent sorting system which comprises intelligent sorting equipment, an X-ray recognition system, an image recognition system, an intelligent control system and a data acquisition system and is used for acquiring various data in the sorting process, including coal gangue sorting data, equipment operation data, environment parameter data and the like. And data support is provided for intelligent control and optimization. The intelligent control system is connected with the intelligent sorting equipment, the X-ray recognition system, the image recognition system and the data acquisition system, the X-ray recognition system performs intelligent recognition by adopting X-rays, sorting is performed according to different material densities, and the materials with different densities absorb different X-rays, so that the sorting efficiency is improved. And images with different gray levels are presented under the intelligent identification source and are marked into different colors, and the intelligent sorting equipment performs sorting according to different colors of material imaging. The invention has the advantages of small equipment volume, simple system, high sorting precision, lower investment cost and the like.

Description

Technical Field

[0001] The invention relates to the technical field of underground lump coal gangue sorting, and in particular to an intelligent sorting system. Background Art

[0002] A large amount of gangue is produced during coal mining. The traditional pre-discharge method has problems such as complex process, numerous equipment, low sorting accuracy, medium and coal slurry water system, and high initial investment and later maintenance costs, which makes it difficult to meet the needs of green mining in modern mines. In contrast, the TDS intelligent sorting machine has the advantages of small equipment size, simple system, high sorting accuracy and low investment cost, but the existing TDS intelligent sorting machine is often transported as a whole machine. However, due to rigid conditions such as wellhead size, it is impossible to lower the whole machine into the well. Therefore, an intelligent sorting system has been developed, which has the advantages of small equipment size, simple system, high sorting accuracy and low investment cost, which is convenient for flat layout underground. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an intelligent sorting system to solve the problems pointed out in the above background technology.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted is as follows:

[0005] An intelligent sorting system, comprising:

[0006] Intelligent sorting equipment, including TDS intelligent sorting machine, is used to pre-discharge gangue from raw coal, use gangue with particle size >20mm directly for underground filling, and lift lump coal with particle size <20mm to the ground for further washing and processing;

[0007] X-ray identification system, used for digital identification of coal and gangue, improving identification accuracy and reducing gangue rate;

[0008] Image recognition system, used to identify the surface features of coal and gangue, assisting the X-ray recognition system to improve recognition accuracy;

[0009] Intelligent control system is used to automatically control intelligent sorting equipment and dynamically adjust sorting parameters according to real-time monitoring data to improve sorting efficiency and accuracy.

[0010] The data acquisition system is used to collect various types of data during the sorting process, including coal gangue sorting data, equipment operation data, environmental parameter data, etc., to provide data support for intelligent control and optimization.

[0011] The intelligent control system is respectively connected to the intelligent sorting equipment, X-ray recognition system, image recognition system and data acquisition system. The X-ray recognition system uses X-rays for intelligent recognition and sorts materials according to their density. Materials of different densities absorb X-rays differently and present images with different grayscales under the intelligent recognition source and are marked with different colors. The intelligent sorting equipment sorts materials according to the different colors of the material images.

[0012] As a further improvement of the present invention, the X-ray recognition system adopts a pseudo dual-energy X-ray transmission recognition system, and the main recognition principle is the Lambert-Beer law. The Lambert-Beer law is the basic law of light absorption and is applicable to all electromagnetic radiation and all light-absorbing substances, including gases, solids, liquids, molecules, atoms and ions. The formula is:

[0013] I=I0e -μhρ

[0014] Where, I and I0 are the ray intensities before and after incident and after passing through the object to be detected, μ is the mass absorption coefficient, h is the thickness of the object to be detected, ρ is the density of the object to be detected, and e is a natural constant, which is approximately 2.71828;

[0015] Based on the above principle, the high-energy X-ray intensity I before the X-rays penetrate the object can be detected by the X-ray detector. 0高 With low energy X-ray intensity I 0低 And the high-energy X-ray intensity I after the X-ray passes through the object 高 With low energy X-ray intensity I 低 , respectively, into the Lambert-Beer law formula to obtain:

[0016]

[0017] Taking the logarithm of both sides of the system of equations gives:

[0018]

[0019] In the formula, I 0高 ,I 高 ,I 0低 ,I 低 Both have been measured. Comparing the two equations and eliminating the influence of thickness h, we can get:

[0020]

[0021] Among them, the K value is the characteristic parameter of the detected object;

[0022] The higher the atomic number, the greater the absorption coefficient for low-energy rays, while the absorption coefficient for high-energy rays is basically the same, K = μ 低 / μ 高It can be seen that: the more light elements it contains, the smaller the K value is, and the more heavy elements it contains, the larger the K value is. Therefore, the sorting density is set to the value X. When K>X, the object being tested is determined to be gangue; when K≤X, the object being tested is determined to be coal. Adjusting the K value is equivalent to adjusting the sorting density.

[0023] As a further improvement of the present invention, the TDS intelligent sorting machine is made of stainless steel, which can better adapt to the wet and corrosive environment underground and improve the life and stability of the equipment.

[0024] As a further improvement of the present invention, the TDS intelligent sorting machine adopts a wet dust collector so that the gas can be discharged directly without special treatment.

[0025] The beneficial effects of the present invention are:

[0026] 1. The system of the present invention is simple, narrow and small in size. Since it does not need to use water and medium to sort the coal, there is no product dehydration, de-mediuming, water treatment and medium recovery system, which greatly simplifies the process flow. There are fewer links, fewer failure points and a low failure rate.

[0027] 2. The present invention has a large processing capacity, and the maximum coal processing capacity of a single device is 300t / h. It can flexibly adjust whether to "beat coal" or "beat gangue" according to the coal quality. When there is little gangue, the ray "beats gangue"; when there is a lot of gangue, the ray can reversely "beat coal". The positive selection and reverse selection can be flexibly switched to solve the problems of poor sorting effect and severe wear of other processes when the gangue content is large.

[0028] 3. The present invention has high sorting accuracy, can reduce the loss of coal in gangue, and improve the economic benefits of enterprises. In the pre-gangue removal process, X-ray can generally achieve a gangue coal rate of 1-3%.

[0029] 4. The intelligent sorting system of the present invention adopts advanced detection and execution technology. The sorting process does not require water, does not produce coal slime, and does not have a coal slime water treatment system, so the operating cost is low. In addition, the intelligent dry sorting process equipment is small in size (the equipment length is generally 8-10m), suitable for underground layout, and the general tunnel section can meet the system layout requirements. It has the advantages of low comprehensive cost, and the sorting accuracy meets the requirements of pre-discharge of gangue. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0031] An intelligent sorting system, comprising:

[0032] Intelligent sorting equipment, including TDS intelligent sorting machine, is used to pre-discharge gangue from raw coal, use gangue with particle size >20mm directly for underground filling, and lift lump coal with particle size <20mm to the ground for further washing and processing;

[0033] X-ray identification system, used for digital identification of coal and gangue, improving identification accuracy and reducing gangue rate;

[0034] Image recognition system, used to identify the surface features of coal and gangue, assisting the X-ray recognition system to improve recognition accuracy;

[0035] Intelligent control system is used to automatically control intelligent sorting equipment and dynamically adjust sorting parameters according to real-time monitoring data to improve sorting efficiency and accuracy.

[0036] The data acquisition system is used to collect various types of data during the sorting process, including coal gangue sorting data, equipment operation data, environmental parameter data, etc., to provide data support for intelligent control and optimization.

[0037] The intelligent control system is respectively connected to the intelligent sorting equipment, X-ray recognition system, image recognition system and data acquisition system. The X-ray recognition system uses X-rays for intelligent recognition and sorts materials according to their density. Materials of different densities absorb X-rays differently and present images with different grayscales under the intelligent recognition source and are marked with different colors. The intelligent sorting equipment sorts materials according to the different colors of the material images.

[0038] The X-ray recognition system adopts a pseudo dual-energy X-ray transmission recognition system. The main recognition principle is the Lambert-Beer law. The Lambert-Beer law is the basic law of light absorption and is applicable to all electromagnetic radiation and all light-absorbing substances, including gases, solids, liquids, molecules, atoms and ions. The formula is:

[0039] I=I0e -μhρ

[0040] Where, I and I0 are the ray intensities before and after incident and after passing through the object to be detected, μ is the mass absorption coefficient, h is the thickness of the object to be detected, ρ is the density of the object to be detected, and e is a natural constant, which is approximately 2.71828;

[0041] Based on the above principle, the high-energy X-ray intensity I before the X-rays penetrate the object can be detected by the X-ray detector. 0高 With low energy X-ray intensity I 0低 And the high-energy X-ray intensity I after the X-ray passes through the object 高 With low energy X-ray intensity I 低, respectively, into the Lambert-Beer law formula to obtain:

[0042]

[0043] Taking the logarithm of both sides of the system of equations gives:

[0044]

[0045] In the formula, I 0高 ,I 高 ,I 0低 ,I 低 Both have been measured. Comparing the two equations and eliminating the influence of thickness h, we can get:

[0046]

[0047] Among them, the K value is the characteristic parameter of the detected object;

[0048] Since coal and gangue contain different elements, coal is mainly composed of "light" elements such as C and H, while gangue is mainly composed of "heavy" elements such as Si and A1. There are very obvious differences in the absorption and attenuation of high and low energy rays between light elements and heavy elements, as shown in Table 1.

[0049] Table 1 Mass absorption coefficients of some main elements in coal and gangue

[0050] Wavelength, λ, A 0.6 0.4 0.3 0.2 0.1 0.04 Energy, E, KeV 20 30 40 50 120 300 carbon 0.35 0.22 0.19 0.16 0.12 0.09 hydrogen 0.46 0.35 0.32 0.28 0.24 0.17 oxygen 0.9 0.42 0.29 0.22 0.12 0.09 sulfur 5.52 1.74 0.85 0.32 0.13 0.09 silicon 3.85 1.25 0.58 0.24 0.14 0.09 aluminum 3.10 1.01 0.52 0.24 0.12 0.09 iron 24.90 7.80 3.42 1.15 0.32 0.10 titanium 14.50 4.50 1.95 0.72 0.20 0.09 calcium 11.15 3.24 1.46 0.58 0.18 0.09 Potassium 9.52 3.01 1.35 0.51 0.16 0.09

[0051] From the table above, we can see that the higher the atomic number, the greater the absorption coefficient for low-energy rays, while the absorption coefficient for high-energy rays is basically the same, K = μ 低 / μ 高 It can be seen that: the more light elements it contains, the smaller the K value is, and the more heavy elements it contains, the larger the K value is. Therefore, the sorting density is set to the value X. When K>X, the object being tested is determined to be gangue; when K≤X, the object being tested is determined to be coal. Adjusting the K value is equivalent to adjusting the sorting density.

[0052] The TDS intelligent sorting machine is made of stainless steel, which can better adapt to the wet and corrosive environment underground and improve the life and stability of the equipment.

[0053] The TDS intelligent separator adopts a wet dust collector, so that the gas can be discharged directly without special treatment.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, component splitting or combination, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent sorting system, characterized in that: include, Intelligent sorting equipment, including TDS intelligent sorting machine, is used to pre-discharge gangue from raw coal. Gangue with particle size >20mm is directly used for underground filling, and lump coal with particle size <20mm is lifted to the surface for further washing and processing; X-ray identification system, used for digital identification of coal and gangue, improving identification accuracy and reducing gangue rate; Image recognition system, used to identify the surface features of coal and gangue, assisting the X-ray recognition system to improve recognition accuracy; Intelligent control system is used to automatically control intelligent sorting equipment and dynamically adjust sorting parameters according to real-time monitoring data to improve sorting efficiency and accuracy. The data acquisition system is used to collect various types of data during the sorting process, including coal gangue sorting data, equipment operation data, environmental parameter data, etc., to provide data support for intelligent control and optimization. The intelligent control system is respectively connected to the intelligent sorting equipment, X-ray recognition system, image recognition system and data acquisition system. The X-ray recognition system uses X-rays for intelligent recognition and sorts materials according to their density. Materials of different densities absorb X-rays differently and present images with different grayscales under the intelligent recognition source and are marked with different colors. The intelligent sorting equipment sorts materials according to the different colors of the material images.

2. The intelligent sorting system according to claim 1, characterized in that: The X-ray recognition system adopts a pseudo dual-energy X-ray transmission recognition system. The main recognition principle is the Lambert-Beer law. The Lambert-Beer law is the basic law of light absorption and is applicable to all electromagnetic radiation and all light-absorbing substances, including gases, solids, liquids, molecules, atoms and ions. The formula is: I=I0e -μhρ Where, I and I0 are the ray intensities before and after incident and after passing through the object to be detected, μ is the mass absorption coefficient, h is the thickness of the object to be detected, ρ is the density of the object to be detected, and e is a natural constant, which is approximately 2.71828; Based on the above principle, the high-energy X-ray intensity I before the X-rays penetrate the object can be detected by the X-ray detector. 0高 With low energy X-ray intensity I 0低 And the high-energy X-ray intensity I after the X-ray passes through the object 高 With low energy X-ray intensity I 低 , respectively, into the Lambert-Beer law formula to obtain: Taking the logarithm of both sides of the system of equations gives: In the formula, I 0高 ,I 高 ,I 0低 ,I 低 Both have been measured. Comparing the two equations and eliminating the influence of thickness h, we can get: Among them, the K value is the characteristic parameter of the detected object; The higher the atomic number, the greater the absorption coefficient for low-energy rays, while the absorption coefficient for high-energy rays is basically the same, K = μ 低 / μ 高 It can be seen that the more light elements it contains, the smaller the K value is, and the more heavy elements it contains, the larger the K value is. Therefore, the sorting density is set to the value X. When K>X, the object being tested is determined to be gangue; when K≤X, the object being tested is determined to be coal. Adjusting the K value is equivalent to adjusting the sorting density.

3. The intelligent sorting system according to claim 1, characterized in that: The TDS intelligent sorting machine is made of stainless steel.

4. The intelligent sorting system according to claim 1, characterized in that: The TDS intelligent sorting machine adopts a wet dust collector.

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