Online real-time coal quality detection system

Abstract

The utility model relates to the technical field of coal quality detection, and discloses an on-line real-time coal quality detection system which comprises a sampling unit, a sample processing unit, a conveying unit, an analysis and inspection unit and a data coupling processing unit, the input end of the sampling unit is connected with a coal conveying belt, and the output end of the sampling unit is connected with the input end of the sample processing unit; a returned material output unit of the sample processing unit is connected with the coal conveying belt, a sample output end of the sample processing unit is connected with the conveying unit, an output end of the conveying unit is connected with the coal conveying belt through the analysis and inspection unit, and the analysis and inspection unit is electrically connected with the data coupling processing unit. According to the real-time coal quality nondestructive testing system, complicated physical and chemical reactions do not need to be carried out in the testing process, all detected samples return to the coal flow, nondestructive testing of the coal quality is achieved, and the time and labor cost of sample detection are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal quality detection technical field, concretely is an online real -time coal quality detection system. BACKGROUND

[0002] China's coal reserves are rich, with the continuous progress of clean and efficient utilization of coal resources, coal quality analysis and detection has become an important part of coal resource utilization, has important significance in the process of coal resource utilization production and operation, only reasonable analysis and grasp the various indicators of coal can ensure the rational and effective application of coal resources.

[0003] The coal quality analysis and detection process is to test and test the coal sample by physical and chemical methods, and the conventional analysis method mainly includes industrial analysis and element analysis. When the industrial analysis is operated, a certain amount of coal is heated to different temperatures, and different components are evaporated, dry distillation and combustion under different air atmosphere, etc. Finally, the contents of water, volatile matter, ash and fixed carbon are calculated by weighing. When the element analysis is operated, the coal is burned to generate different component gases, and the different component gases are reacted, adsorbed, separated and other ways, and the weight percentage of carbon, hydrogen, nitrogen, sulfur and other elements is calculated according to the increment of different concentration, volume, current and other values measured in the analysis process.

[0004] The traditional coal quality analysis method needs material preparation to participate in different physical and chemical reactions, and the analysis and detection process is low in efficiency and consumes a lot of time and manpower due to a series of physical and chemical reactions, and the accuracy of the analysis data information is also prone to abnormality. At present, most of the quality detection of coal-fired power plants is also applied to the above mode, and the detection result lags behind the boiler combustion operation, which cannot provide the coal quality in time, is not conducive to the boiler combustion blending, and brings many potential unsafe factors and economic influence to the power plant production,

[0005] With the development of technology, the technology of real-time detection of coal quality is also developing, such as near-infrared spectroscopy technology, which has different absorption characteristics of near-infrared light in different components of coal. By irradiating the coal sample with a near-infrared spectrometer, collecting the reflected or transmitted spectral signals, and then using chemometrics methods to establish a quantitative relationship model between the spectrum and the coal quality indicators (such as moisture, ash, volatile matter, calorific value, etc.), the coal quality information can be obtained quickly and non-destructively. For example, X-ray fluorescence spectroscopy technology, when the coal sample is irradiated with X-rays, the elements in the sample will emit characteristic X-ray fluorescence. According to the intensity and energy of the fluorescence, the types and contents of various elements in the coal can be determined, and then the ash content, sulfur content and other quality indicators of the coal can be inferred. This technology can be used to analyze the constant and trace elements in coal, and has the advantages of fast analysis speed, high precision, non-destructive sample, etc. However, these methods require high operation precision, the difference in sample collection has a great influence on the detection results, and the detected sample cannot be returned to the coal flow, so it cannot realize non-destructive testing. Based on the above problems, the patent concept is proposed. SUMMARY

[0006] The utility model discloses to solve the above -mentioned problem, provide an online real -time coal quality detection system.

[0007] The utility model discloses the following technical scheme is adopted to realize:

[0008] An online real-time coal quality detection system, comprising a sampling unit, a sample processing unit, a conveying unit, an analysis and testing unit, and a data coupling processing unit, the input end of the sampling unit is connected with the coal conveying belt, the output end of the sampling unit is connected with the input end of the sample processing unit, the material return output unit of the sample processing unit is connected with the coal conveying belt, the sample output end of the sample processing unit is connected with the conveying unit, the output end of the conveying unit is connected with the coal conveying belt through the analysis and testing unit, and the analysis and testing unit is electrically connected with the data coupling processing unit.

[0009] In implementation, the sampling unit, the sample processing unit, the conveying unit, the analysis and testing unit and the data coupling processing unit are connected, the input end of the sampling unit is connected with the coal conveying belt, the output end of the sampling unit is connected with the input end of the sample processing unit, the material return output unit of the sample processing unit is connected with the coal conveying belt, the sample output end of the sample processing unit is connected with the conveying unit, the output end of the conveying unit is connected with the coal conveying belt through the analysis and testing unit, and the analysis and testing unit is electrically connected with the data coupling processing unit.

[0010] Specifically, the sampling unit comprises a movable mechanical grab bucket mounted by a mechanical arm, a collection point of the mechanical grab bucket is a coal conveying belt, a release point of the mechanical grab bucket is a feeding port of the crushing and screening treatment, a bottom of the mechanical arm is mounted on one side of the coal conveying belt, the mechanical arm comprises a fixed arm, a large arm and a small arm connected in sequence by joints, the mechanical arm is hollow groove type structure, a channel for wiring is arranged in the groove, the mechanical arm is powered by electric energy;

[0011] The joint comprises a rotating shaft, a bearing and a fixed seat, the rotating shaft is mounted on the fixed seat through the bearing, and the fixed seat is fixedly connected with two adjacent mechanical arms;

[0012] The small arm is connected with the head of the mechanical grab bucket through the joint, and the mechanical grab bucket is opened and closed to realize material sampling; a pull rod connected by a cross beam is arranged below the head of the mechanical grab bucket, and a closed bucket part is fixed to a free end of the pull rod.

[0013] The sample processing unit comprises an integrated crushing and screening treatment device, a return port of the crushing and screening treatment device is connected with an inlet of a return pipe, an outlet of the return pipe is arranged above the coal conveying belt and located at a lower section of the collection area of the mechanical grab bucket, and a sample outlet of the crushing and screening treatment device is connected with an input end of the conveying unit.

[0014] The conveying unit comprises a micro belt, an output end of the micro belt is located directly above the coal conveying belt and at the lower section of the collection area of the mechanical grab bucket, and an analysis and inspection unit is arranged below the output end of the micro belt.

[0015] The analysis and inspection unit comprises a pulse bin through which the sample passes from top to bottom, the pulse bin is mounted below the output end of the micro belt, a light wave emitter opposite to the pulse bin is arranged on one side of the pulse bin, a light wave receiver is arranged on the other side of the pulse bin, the light wave receiver is signal connected with a control system, and the control system is electrically connected with a data coupling processing unit.

[0016] The data coupling processing unit comprises a computer for analyzing and detecting various coal quality indexes.

[0017] Further, an upper portion of the crushing and screening treatment device is mounted on an upper portion of a fixed support by a support, a rain shelter is mounted on a top of the fixed support, and the coal conveying belt is located below the rain shelter.

[0018] Further, the crushing and screening treatment device comprises a crusher and a screening machine arranged from top to bottom, the crusher is provided with a feeding port above, the crusher is connected with the screening machine below, a return port of the screening machine is connected with an inlet of a return pipe, the screening machine is provided with a sample outlet below, and the sample outlet is opposite to an input end of the micro belt.

[0019] Further, an output end of the micro belt is provided with an electronic belt scale, the electronic belt scale is signal connected with a driving control system of the micro belt, and the driving control system is signal connected with the control system.

[0020] In use, after receiving a start signal of sample analysis detection of the control system, the sampling unit collects a coal sample from a coal flow conveyed by the coal conveying belt according to a set time interval, and sends the obtained sample to the sample processing unit; in this process, the mechanical grab cooperates with the mechanical arm to realize collection of samples of various coal conveying belts and different positions, and meanwhile, the closed bucket part can realize collection of samples of different moisture contents and different particle sizes.

[0021] The sample processing unit performs preliminary crushing, deep crushing, grinding and vibration screening on the sample to obtain a sample meeting the detection standard, the screened sample is discharged through a discharge port, and finally returns to the coal flow of the belt conveyor, so that the sample is recycled; the sample processing unit can realize precise screening and preparation of samples of different particle sizes by replacing different crushing roller shafts and bottom screens of the vibration screening structure.

[0022] The conveying unit has a weighing function while conveying, is connected with a driving control system signal of the micro belt, automatically adjusts the rotating speed of the micro belt according to the sample quality measured by the analysis and detection unit, realizes adjustment of the conveying speed of the micro belt, increases the conveying speed when the sample weight is detected to be large, reduces the sample accumulation degree on the micro belt, and continuously and uniformly conveys the detection sample to the inlet of the analysis and detection unit.

[0023] The analysis and detection unit and the data coupling processing unit detect the sample falling into the pulse bin, pass through the detection channel, and finally return the material passing through the detection channel to the belt conveyor of the coal flow; the data coupling processing unit performs real-time data statistics and calculation during sample detection, obtains the final detection result after the sample detection data is stable for a period of time, transmits the sample detection result to the control center, and then stops the sampling unit, the sample processing unit, the conveying unit and the analysis and detection unit; if the detection data cannot be stable within a set time period, the data processing unit sends a reminder information to the control center.

[0024] Compared with the prior art, the online real-time coal quality detection system has the following beneficial effects: the online real-time coal quality detection system is installed to a material conveying site to realize integration, realizes nondestructive detection of coal quality through terahertz spectrum technology, the terahertz light wave energy is low, so the detected material is not easily damaged, and the human body is not harmed; the samples after detection all return to the coal flow, nondestructive detection of coal quality is realized, and the time and labor cost of sample detection are greatly reduced; the data transmission function transmits the data obtained by real-time detection to the control center.

[0025] The system can realize online real-time detection of coal quality, save detection time, and reduce detection cost of production and operation activities. The system can reduce external influencing factors in the analysis and detection process, reduce systematic error and accidental error in the analysis and detection process, and improve data accuracy.

[0026] Compared with the original detection and analysis of coal samples by physical and chemical methods, the real-time coal quality nondestructive detection system does not need to perform complex physical and chemical reactions in the detection process, and the samples after detection are all returned to the coal flow, realizing nondestructive detection of coal quality and greatly reducing the time and labor cost of sample detection.

[0027] From the initial sampling of the sample to the final analysis and detection result of the sample, the system does not need an analysis personnel to participate in the sampling, sample preparation, analysis, calculation and other processes, and adopts an automatic detection process throughout, reduces external influencing factors in the analysis and detection process, reduces systematic error and accidental error in the analysis and detection process, and improves data accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The overall structure of the utility model is shown.

[0029] In the figure: 1-coal belt, 2-fixed support, 3-mechanical arm, 4-mechanical grab, 5-return pipe, 6-sample outlet, 7-mini belt, 8-pulse bin, 9-rain shelter, 10-light wave emitter, 11-light wave receiver, 12-computer, 13-control system, 14-crusher, 15-screening machine, 16-feed inlet, 17-return inlet. DETAILED DESCRIPTION

[0030] The specific embodiments of the utility model will be described below in combination with the drawings.

[0031] An online real-time coal quality detection system, as shown in Figure 1 The sampling unit includes a movable mechanical grab 4 installed through a mechanical arm 3, the collection point of the mechanical grab 4 is a coal belt 1, the release point of the mechanical grab 4 is a feed inlet 16 of a crushing and screening treatment, the bottom of the mechanical arm 3 is installed on one side of the coal belt 1, the mechanical arm 3 includes a fixed arm, a large arm and a small arm connected through joints in sequence, the mechanical arm 3 is all hollow groove type structure, a channel for wiring is arranged in the groove, and the mechanical arm is powered by electric energy;

[0032] The joint includes a rotating shaft, a bearing and a fixed seat, the rotating shaft is installed on the fixed seat through the bearing, and the fixed seat is fixedly connected with two adjacent mechanical arms;

[0033] The small arm is connected with the head of the mechanical grab 4 through a joint, and the material sampling is realized through the opening and closing of the mechanical grab 4; a pull rod connected through a cross beam is arranged below the head of the mechanical grab 4, and a closed bucket is fixed at the free end of the pull rod.

[0034] The sample processing unit comprises an integrated crushing and screening processing device, the return port 17 of the crushing and screening processing device is connected with the inlet of the return pipe 5, the outlet of the return pipe 5 is arranged above the coal conveying belt 1 and at the lower section of the sampling area of the mechanical grab 4, and the outlet of the crushing and screening processing device is connected with the input end of the conveying unit.

[0035] The conveying unit comprises a micro belt 7, the output end of the micro belt 7 is provided with an electronic belt scale, the electronic belt scale is signal connected with the driving control system of the micro belt 7, the driving control system is signal connected with the control system 13; the output end of the micro belt 7 is located directly above the coal conveying belt 1 and at the lower section of the sampling area of the mechanical grab 4, and the output end of the micro belt 7 is provided with an analysis and inspection unit below.

[0036] The analysis and inspection unit comprises a pulse bin 8 through which the sample passes from top to bottom, the pulse bin 8 is arranged below the output end of the micro belt 7, one side of the pulse bin 8 is provided with a light wave emitter 10 opposite to the pulse bin 8, and the other side of the pulse bin 8 is provided with a light wave receiver 11, the light wave receiver 11 is signal connected with the control system 13, and the control system 13 is electrically connected with the data coupling processing unit.

[0037] The data coupling processing unit comprises a computer for analyzing and detecting various coal quality indexes.

[0038] Further, the upper part of the crushing and screening processing device is arranged on the upper part of the fixed support 2 through a support, a rain shelter 9 is arranged on the top of the fixed support 2, and the coal conveying belt 1 is located below the rain shelter 9.

[0039] Further, the crushing and screening processing device comprises a crusher 14 and a screening machine 15 arranged from top to bottom, the upper part of the crusher 14 is provided with a feeding port 16, the lower part of the crusher 14 is connected with the screening machine 15, the return port of the screening machine 15 is connected with the inlet of the return pipe 5, the lower part of the screening machine 15 is provided with the sample outlet 6, and the sample outlet 6 is opposite to the input end of the micro belt 7.

[0040] In use, after receiving the start signal of the sample analysis and detection of the control system, the sampling unit collects the coal sample from the coal flow conveyed by the coal conveying belt 1 according to the set time interval, and sends the obtained sample to the sample processing unit; in this process, the mechanical grab 4 cooperates with the mechanical arm to realize the sampling of various coal conveying belts and samples at different positions, and the closed bucket can realize the sampling of samples with different moisture contents and different particle sizes.

[0041] The sample processing unit carries out preliminary crushing, deep crushing, grinding and vibration screening on the sample, so that the sample meeting the detection standard is obtained, the screened sample is discharged through the discharge port, and finally the coal flow returning to the belt conveyor is realized, so that the sample is recycled; the sample processing unit can realize precise screening and preparation of samples with different particle sizes by replacing the different crushing roller shafts and the bottom screen of the vibration screening structure.

[0042] The conveying unit has a weighing function while conveying, the driving control system signal of the micro belt 7 is connected, the rotation speed of the micro belt 7 is automatically adjusted according to the sample quality measured by the analysis and detection unit, the conveying speed of the micro belt 7 is adjusted, when the sample weight is detected, the conveying speed is increased, the sample accumulation degree on the micro belt 7 is reduced, and the detection sample is continuously and uniformly conveyed to the inlet of the analysis and detection unit.

[0043] The analysis and detection unit and the data coupling processing unit detect the sample falling into the pulse bin 8, pass through the detection channel, and finally the material passing through the detection channel is returned to the belt conveyor of the coal flow again, the data is statistically and calculated in real time during the sample detection process of the unit, after the sample detection data is stable for a period of time, the final detection result is obtained, the sample detection result is transmitted to the control center, and then the sampling unit, the sample processing unit, the conveying unit and the analysis and detection unit are stopped, if the detection data cannot be stable within the set time period, the data processing unit sends a reminder information to the control center.

[0044] The scope of protection of the utility model is not limited to the above specific embodiments, and for those skilled in the art, the utility model can have various modifications and alterations, any modification, improvement and equivalent replacement made within the concept and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An online real-time coal quality detection system, characterized in that: It comprises a sampling unit, a sample processing unit, a conveying unit, an analysis and inspection unit, a data coupling processing unit, The input end of the sampling unit is connected with the coal conveying belt (1), and the output end of the sampling unit is connected with the input end of the sample processing unit, The return material output unit of the sample processing unit is connected with the coal conveying belt (1), and the sample output end of the sample processing unit is connected with the conveying unit, The output end of the conveying unit is connected with the coal conveying belt (1) through the analysis and inspection unit, The analysis and inspection unit is electrically connected with the data coupling processing unit.

2. The online real-time coal quality detection system according to claim 1, characterized in that: The sampling unit comprises a movable mechanical grab (4) installed through a mechanical arm (3), the bottom of the mechanical arm (3) is installed on one side of the coal conveying belt (1), The sample processing unit comprises an integrated crushing and screening processing device, the return material port of the crushing and screening processing device is connected with the inlet of the return material pipe (5), the outlet of the return material pipe (5) is arranged above the coal conveying belt (1) and located at the lower section of the collection area of the mechanical grab (4), and the sample outlet (6) of the crushing and screening processing device is connected with the input end of the conveying unit below, The conveying unit comprises a micro belt (7), the output end of the micro belt (7) is located directly above the coal conveying belt (1) and at the lower section of the collection area of the mechanical grab (4), and the analysis and inspection unit is arranged below the output end of the micro belt (7), The analysis and inspection unit comprises a pulse bin (8) through which the sample passes from top to bottom, the pulse bin (8) is installed below the output end of the micro belt (7), one side of the pulse bin (8) is provided with a light wave emitter (10) opposite to the pulse bin (8), the other side of the pulse bin (8) is provided with a light wave receiver (11), the light wave receiver (11) is signal connected with a control system (13), and the control system (13) is electrically connected with the data coupling processing unit, The data coupling processing unit comprises a computer (12) for analyzing and detecting various coal quality indexes.

3. The online real-time coal quality detection system according to claim 2, characterized in that: The upper part of the crushing and screening processing device is installed on the upper part of the fixed support (2) through a support.

4. The online real-time coal quality detection system according to claim 2, characterized in that: The mechanical arm (3) comprises a fixed arm, a large arm and a small arm connected through joints in sequence, the mechanical arm (3) is in a hollow groove structure, and a channel for wiring is arranged in the groove; The joint comprises a rotating shaft, a bearing and a fixed seat, the rotating shaft is installed on the fixed seat through the bearing, and the fixed seat is fixedly connected with two adjacent mechanical arms; The small arm is connected with the head of the mechanical grab (4) through a joint, a pull rod connected through a cross beam is arranged below the head of the mechanical grab (4), and a closed bucket part is fixed to the free end of the pull rod.

5. The online real-time coal quality detection system according to claim 4, characterized in that: The collection point of the mechanical grab (4) is the coal conveying belt (1), and the release point of the mechanical grab (4) is the feeding port (16) of the crushing and screening processing device.

6. The online real-time coal quality detection system according to claim 5, characterized in that: The crushing and screening device comprises a crusher (14) and a screening machine (15) arranged from top to bottom, the crusher (14) is provided with a feeding port (16) at the top, the crusher (14) is connected with the screening machine (15) at the bottom, the return port of the screening machine (15) is connected with the inlet of the return pipe (5), the screening machine (15) is provided with a sample outlet (6) at the bottom, and the sample outlet (6) is opposite to the input end of the micro belt (7).

7. The online real-time coal quality detection system according to claim 6, characterized in that: The output end of the micro belt (7) is provided with an electronic belt scale, the electronic belt scale is signal connected with a driving control system of the micro belt (7), and the driving control system is signal connected with a control system (13).

8. The online real-time coal quality detection system according to claim 3, characterized in that: A rain shelter (9) is mounted on the top of the fixed support (2), and the coal conveying belt (1) is located below the rain shelter (9).

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