Ash content detection system

Abstract

The invention relates to the technical field of radiation testing, in particular to an ash content detection system which comprises an in-furnace weighing assembly and a firing furnace, the firing furnace is installed on a construction detection base plane, and a sample detection table and a feeding transmission assembly are arranged on the two sides of the firing furnace respectively. A detection end processing mechanism is mounted between the sample detection table and the firing furnace, a temperature testing assembly is mounted between the detection end processing mechanism and the sample detection table, and a first-stage firing detection assembly and a second-stage non-inductive ash content detection assembly are arranged at one end of the feeding transmission assembly; secondary approval detection is completed by the primary burning detection assembly and the secondary non-inductive ash content detection assembly, abnormal data error correction and internal cross validation are realized, detection deviation caused by non-representative data of coal samples is avoided, accidental errors caused by reasons such as equipment abnormity and unevenness of the coal samples in single-time detection are effectively identified, and the detection accuracy is improved. And the reliability of a detection result is obviously improved.

Description

Technical Field

[0001] This invention belongs to the field of radiation testing technology, and specifically relates to an ash content detection system. Background Technology

[0002] Existing ash content testing systems primarily employ the gravimetric analysis method to determine the ash content of raw coal. This method compares the specific gravity of the raw coal before and after combustion to derive the ash content index. However, the existing slow ash method has a long testing cycle. When abnormal results occur, such as sudden changes in ash content, operators cannot immediately determine whether the issue stems from a change in the coal's inherent quality or from thermocouple malfunction leading to inaccurate furnace temperature. Resampling and retesting are necessary, lacking immediate error correction and internal cross-validation. Furthermore, inconsistent temperature data from coal samples can easily lead to detection biases, thus impacting testing accuracy. Therefore, we propose an ash content testing system. Summary of the Invention

[0003] This invention provides an ash content detection system to solve the problems mentioned in the background art.

[0004] This invention provides the following technical solution: it includes an in-furnace weighing component and a calcination furnace. The calcination furnace is installed on the construction and testing base surface. Sample testing platforms and feeding and conveying components are respectively arranged on both sides of the calcination furnace. A detection end processing mechanism is installed between the sample testing platform and the calcination furnace. A temperature testing component is installed between the detection end processing mechanism and the sample testing platform. A primary calcination detection component and a secondary non-inductive ash content detection component are arranged at one end of the feeding and conveying component. The feeding and conveying component is used to transport the coal sample to be burned to the upper end of the furnace weighing component inside the burning furnace. The furnace weighing component weighs the batch of coal samples currently transported by the feeding and conveying component. After weighing, the detection end processing mechanism is used to grasp the coal sample. After the temperature of the grasped coal sample is detected by the temperature testing component and reaches the set value, the primary burning detection component and the secondary non-sensitive ash content detection component perform ash content detection on the coal sample and complete the difference comparison.

[0005] A further improvement of the present invention is that the in-furnace weighing assembly includes a weighing mechanism and an in-furnace heat insulation unit. The weighing mechanism is installed at the bottom of the incineration furnace, the output end of the weighing mechanism is fixedly connected to the in-furnace heat insulation unit, and the in-furnace heat insulation unit extends into the interior of the incineration furnace.

[0006] A further improvement of the present invention is that the feeding and conveying assembly includes an in-furnace guide rail, a feeding adjustment rail, and a sample lifting rail, wherein the sliding end of the feeding adjustment rail is connected to the sample lifting rail, and the output end of the sample lifting rail is connected to the in-furnace guide rail.

[0007] A further improvement of the present invention is that the detection end processing mechanism includes a sample holding tank, a pressing mechanism, and a detection gripping robotic arm. The detection gripping robotic arm is installed on one side of the incineration furnace, and the output end of the detection gripping robotic arm extends into the interior of the incineration furnace. The pressing mechanism is disposed on one side of the sample holding tank, and the output end of the pressing mechanism is vertically disposed above the sample holding tank.

[0008] A further improvement of the present invention is that the temperature testing component comprises a transmission arm and a temperature measuring unit, wherein the transmission arm is used to adjust the measuring end face of the temperature measuring unit and the detection end processing mechanism when holding the combustion vessel.

[0009] The secondary non-inductive ash content detection component includes a passive secondary detection module, a capture source processing module, and a data display module. The passive secondary detection module is used to acquire radioactive elements in coal and convert them into photons. The capture source processing module is used to convert the current pulse in the photons into a voltage signal, amplify the voltage signal, remove noise, and generate an effective signal. Finally, the generated effective signal is displayed by the data display module.

[0010] The passive secondary detection module consists of a NaI crystal and a PMT analyzer. Radioactive elements in coal are converted into photons after entering the NaI crystal and are captured by the PMT analyzer.

[0011] The capture source processing module comprises a voltage-sensitive preamplifier, a discriminator, a microprocessor, and a D / A converter. The voltage-sensitive preamplifier converts the current pulses in the photons into voltage signals. After the discriminator eliminates noise in the voltage signals, the signals are input to the D / A converter, which then outputs the digital signals to the microprocessor. Finally, the microprocessor calculates the ash content of the coal based on the corresponding count values ​​of the digital signals.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up a dynamic detection structure consisting of an in-furnace weighing component, a sample detection platform, a feeding and conveying component, a detection end processing mechanism, and an ignition furnace, rapid weighing under ignition conditions is achieved. Then, the primary ignition detection component reads the count value in the weighing mechanism, and the ash content ratio before and after ignition is compared by the ignition weighing method to obtain the ash content index in the raw coal. Furthermore, since the primary ignition detection component and the secondary non-inductive ash content detection component complete the secondary verification test, abnormal data correction and internal cross-validation can be achieved, avoiding detection deviations caused by non-representative data of coal samples. It effectively identifies accidental errors caused by equipment malfunctions, uneven coal samples, etc. in a single test, thereby significantly improving the reliability of the test results. Attached Figure Description

[0013] Figure 1This is a side view of an ash content detection system according to the present invention.

[0014] Figure 2 This is a front view of an ash content detection system according to the present invention.

[0015] Figure 3 This is a top view of an ash content detection system according to the present invention.

[0016] Figure 4 This is a three-dimensional structural diagram of an ash content detection system according to the present invention.

[0017] In the diagram: 1. In-furnace weighing assembly; 11. Weighing mechanism; 12. In-furnace insulation unit; 2. Sample testing platform; 3. Feeding and conveying assembly; 31. In-furnace guide rail; 32. Feeding adjustment rail; 33. Sample lifting rail; 4. Testing end processing mechanism; 41. Sample holding tank; 42. Pressing mechanism; 43. Testing and gripping robotic arm; 5. Incineration furnace; 6. Temperature testing assembly; 7. Primary incineration detection assembly; 8. Secondary non-inductive ash content detection assembly. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted. All other specific embodiments obtained by those skilled in the art based on the specific embodiments of the present invention without creative effort are within the scope of protection of the present invention. Please see Figures 1-4 An ash content detection system includes an in-furnace weighing component 1 and an incineration furnace 5. The incineration furnace 5 is installed on the construction and testing base surface. Sample testing platforms 2 and feeding and conveying components 3 are respectively arranged on both sides of the incineration furnace 5. A detection end processing mechanism 4 is installed between the sample testing platform 2 and the incineration furnace 5. A temperature testing component 6 is installed between the detection end processing mechanism 4 and the sample testing platform 2. A primary incineration detection component 7 and a secondary non-inductive ash content detection component 8 are arranged at one end of the feeding and conveying component 3.

[0019] Since the burning furnace usually operates in a high-temperature zone, heat acts directly on the weighing sensor through thermal conduction and thermal radiation. The sensor strain gauge or electromagnetic force coil will experience zero-point drift and range drift due to temperature drift. Therefore, in order to avoid increasing the data error of weighing in the furnace, the furnace insulation unit 12 is set as the isolation part between the combustion vessel in the burning furnace 5 and the weighing unit of the weighing mechanism 11, so as to avoid measurement damage to the weighing sensor.

[0020] In one optional embodiment of this example, the feeding and conveying component 3 is used to transport the coal sample to be calcined to the upper end of the furnace weighing component 1 inside the calcination furnace 5, and the furnace weighing component 1 weighs the batch of coal samples currently transported by the feeding and conveying component 3. After weighing, the detection end processing mechanism 4 is used to grasp the coal sample. After the temperature of the currently grasped coal sample is detected by the temperature testing component 6 and reaches the set value, the primary calcination detection component 7 and the secondary non-sensory ash content detection component 8 perform ash content detection on the coal sample and complete the difference comparison.

[0021] In this embodiment, to avoid the problem that existing detection systems lack real-time error correction of abnormal data and internal cross-validation, and that non-representative data with inconsistent temperatures in coal samples are more likely to cause detection deviations, thus affecting detection accuracy, this invention proposes an ash content detection system. By setting up a primary ignition detection component 7 and a secondary non-inductive ash content detection component 8 to perform ash content detection on coal samples and complete difference comparison, the accuracy of ash content detection is improved.

[0022] In one optional embodiment of this example, the furnace weighing assembly 1 includes a weighing mechanism 11 and a furnace insulation unit 12. The weighing mechanism 11 is installed at the bottom of the furnace 5, and the output end of the weighing mechanism 11 is fixedly connected to the furnace insulation unit 12. The furnace insulation unit 12 extends into the interior of the furnace 5.

[0023] In this embodiment, the weighing mechanism 11 is connected to the furnace insulation unit 12 via the sensor end as a carrier, so that the combustion vessel can be placed on the upper end of the furnace insulation unit 12 and the weighing process in the furnace can be completed directly in the furnace 5. In order to ensure that the weighing value is stable, the weight of the furnace insulation unit 12 can be deducted from the total weight in advance.

[0024] In one optional embodiment of this example, the feeding and conveying component 3 includes an in-furnace guide rail 31, a feeding adjustment rail 32, and a sample lifting rail 33. The sliding end of the feeding adjustment rail 32 is connected to the sample lifting rail 33, and the output end of the sample lifting rail 33 is connected to the in-furnace guide rail 31.

[0025] In this embodiment, the combustion vessel is mounted on the sliding end of the in-furnace guide rail 31 via a clamp. The combustion vessel is driven to move towards the inside of the incineration furnace 5 by the in-furnace guide rail 31. After the movement is completed, the combustion vessel is clamped above the in-furnace insulation unit 12 inside the incineration furnace 5 by the detection and gripping robotic arm 43. Then, the incineration process can begin. In the current state, the temperature measuring unit of the temperature testing component 6 is adjusted to the measuring end face of the combustion vessel inside the incineration furnace 5 by the transmission arm. The incineration temperature is controlled by measuring the temperature inside the incineration furnace 5 by the temperature testing component 6 until the coal sample incineration is completed. In addition, for the convenience of feeding, the lateral position and vertical height of the combustion vessel can be adjusted a second time by the pressing mechanism 42 and the detection and gripping robotic arm 43, so that the combustion vessel can be loaded into the sample holding slot 41 clamp from the side of the incineration furnace 5.

[0026] In one optional embodiment of this example, the detection end processing mechanism 4 includes a sample holding tank 41, a pressing mechanism 42, and a detection gripping robotic arm 43. The detection gripping robotic arm 43 is installed on one side of the incineration furnace 5, and the output end of the detection gripping robotic arm 43 extends into the interior of the incineration furnace 5. The pressing mechanism 42 is disposed on one side of the sample holding tank 41, and the output end of the pressing mechanism 42 is vertically disposed above the sample holding tank 41.

[0027] In this embodiment, after the burning and weighing are completed, the first-level burning detection component 7 reads the count value in the weighing mechanism 11 and compares the ash content ratio before and after burning using the burning and weighing method to obtain the ash content index in the raw coal. After completion, the detection gripping robotic arm 43 clamps the combustion dish into the sample holding tank 41 and places it inside. The second-level non-inductive ash content detection component 8 is then used to prepare for the next stage of detection and verification.

[0028] In one optional embodiment of this example, the temperature testing component 6 includes a transmission arm and a temperature measuring unit. The transmission arm is used to adjust the measuring end face of the temperature measuring unit and the detection end processing mechanism 4 when they hold the combustion vessel. Since the temperature of the coal sample affects the working stability of the photomultiplier tube and the scintillation performance of the crystal, if the coal sample grabbed by the robotic arm has just been taken out of the furnace and its surface temperature is still high, while the coal sample grabbed later has been completely cooled, the physical characteristics of the samples under these two temperature conditions are inconsistent. Direct comparison will lead to the system misjudging the fluctuation of coal quality, causing frequent false alarms or adjustment lag. Therefore, before the secondary non-sensitive ash content detection component 8 is ready for the next stage of detection and verification, the transmission arm adjusts the measuring end face of the temperature measuring unit and the detection end processing mechanism 4 when they hold the combustion vessel, so that the measuring end of the secondary non-sensitive ash content detection component 8 corresponds to the combustion vessel. The cooling temperature of the coal sample is detected in the current state until the temperature drops, and then the subsequent measurement begins through the secondary non-sensitive ash content detection component 8.

[0029] In one optional embodiment of this example, the secondary non-inductive ash content detection component 8 includes a passive secondary detection module, a capture source processing module, and a data display module. The passive secondary detection module is used to acquire radioactive elements in coal and convert them into photons. The capture source processing module is used to convert the current pulse in the photons into a voltage signal, amplify the voltage signal, remove noise, and generate an effective signal. Finally, the generated effective signal is displayed by the data display module.

[0030] In one optional embodiment of this example, the passive secondary detection module comprises a NaI crystal and a PMT analyzer, wherein radioactive elements in the coal are converted into photons after entering the NaI crystal and are captured by the PMT analyzer.

[0031] In one optional embodiment of this example, the source capture processing module comprises a voltage-sensitive preamplifier, a discriminator, a microprocessor, and a D / A converter. The voltage-sensitive preamplifier is used to convert the current pulse in the photon into a voltage signal. After the noise in the voltage signal is eliminated by the discriminator, it is input to the D / A converter, and the D / A converter completes the digital signal output to the microprocessor. Finally, the microprocessor calculates the ash content of the coal based on the corresponding count value of the digital signal.

[0032] In this embodiment, the PMT analyzer is equipped with a photomultiplier tube. When γ-ray photons enter the NaI crystal, the composition principle of sodium iodide changes from the excited state to the ground state. During the atomic state transformation, photons are generated, and the collected photon electrical signal is multiplied by the photomultiplier tube and captured by the PMT analyzer. After capture, the voltage-sensitive preamplifier converts the current pulse in the photon into a voltage signal. After the noise in the voltage signal is eliminated by the discriminator, it is input to the D / A converter. The D / A converter outputs the digital signal to the microprocessor. Finally, the microprocessor calculates the ash content of the coal based on the corresponding count value of the digital signal, and compares it with the parameters after the first-stage ignition detection component 7 is ignited and weighed to confirm the detection error.

[0033] The working principle of this invention is as follows: First, the combustion vessel is installed onto the sliding end of the furnace guide rail 31 using a clamp. Then, the combustion vessel is driven to move inwards through the furnace guide rail 31. After the movement is completed, the combustion vessel is clamped above the furnace insulation unit 12 inside the furnace 5 by the detection and gripping robotic arm 43. At this point, the burning process can begin. In the current state, the temperature measuring unit of the temperature testing component 6 is adjusted to the measuring end face of the combustion vessel inside the furnace 5 by the transmission arm. The temperature testing component 6 measures the temperature inside the furnace 5 to regulate the burning temperature until the coal sample burning is completed. After the burning and weighing are completed, the first-level burning detection component 7 reads the count value in the weighing mechanism 11. The ash content ratio before and after burning is compared by the burning weighing method to obtain the ash content index in the raw coal. After completion, the detection and gripping robotic arm 43 clamps the combustion vessel into the sample holding tank 41 and places it inside the sample holding tank 41. The second-level non-inductive ash content detection component 8 is used to prepare for the next stage of detection and verification. Then, the transmission arm of the temperature testing component 6... Adjust the measuring end face of the temperature measuring unit and the detection end processing mechanism 4 when holding the combustion vessel so that the measuring end of the secondary non-sensitive ash content detection component 8 corresponds to the combustion vessel inside the sample holding tank 41. In the current state, the cooling temperature of the coal sample is detected until the temperature drops. Then, the secondary non-sensitive ash content detection component 8 starts to collect γ-ray photons. When the γ-ray photons enter the NaI crystal, the composition principle of sodium iodide changes from the excited state to the ground state. Photons are generated during the atomic state transformation. The collected photon electrical signal is multiplied by the photomultiplier tube and captured by the PMT. After the capture is completed, the voltage sensitive preamplifier converts the current pulse in the photon into a voltage signal. After the noise in the voltage signal is eliminated by the discriminator, it is input to the D / A converter. The D / A converter completes the digital signal output to the microprocessor. Finally, the microprocessor calculates the ash content of the coal based on the corresponding count value of the digital signal. This is compared with the parameters after the primary ignition detection component 7 is ignited and weighed to confirm the detection error.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An ash content detection system, comprising an in-furnace weighing assembly (1) and a calcination furnace (5), characterized in that: The incineration furnace (5) is installed on the construction and testing base surface. A sample testing platform (2) and a feeding and conveying assembly (3) are respectively set on both sides of the incineration furnace (5). A testing end processing mechanism (4) is installed between the sample testing platform (2) and the incineration furnace (5). A temperature testing assembly (6) is installed between the testing end processing mechanism (4) and the sample testing platform (2). A primary incineration testing assembly (7) and a secondary non-sensitive ash content testing assembly (8) are set at one end of the feeding and conveying assembly (3). The feeding and conveying component (3) is used to transport the coal sample to be burned to the upper end of the furnace weighing component (1) inside the burning furnace (5), and the furnace weighing component (1) weighs the batch of coal samples currently transported by the feeding and conveying component (3). After weighing, the detection end processing mechanism (4) is used to hold the coal sample. After the temperature of the currently held coal sample is detected by the temperature testing component (6) and reaches the set value, the first-level burning detection component (7) and the second-level non-sensory ash detection component (8) perform ash content detection on the coal sample and complete the difference comparison.

2. The ash content detection system according to claim 1, characterized in that: The in-furnace weighing assembly (1) includes a weighing mechanism (11) and an in-furnace insulation unit (12). The weighing mechanism (11) is installed at the bottom of the incineration furnace (5). The output end of the weighing mechanism (11) is fixedly connected to the in-furnace insulation unit (12). The in-furnace insulation unit (12) extends into the interior of the incineration furnace (5).

3. The ash content detection system according to claim 1, characterized in that: The feeding and conveying assembly (3) includes an in-furnace guide rail (31), a feeding adjustment rail (32) and a sample lifting rail (33). The sliding end of the feeding adjustment rail (32) is connected to the sample lifting rail (33), and the output end of the sample lifting rail (33) is connected to the in-furnace guide rail (31).

4. The ash content detection system according to claim 1, characterized in that: The detection end processing mechanism (4) includes a sample holding tank (41), a pressing mechanism (42), and a detection gripping robot arm (43). The detection gripping robot arm (43) is installed on one side of the incineration furnace (5), and the output end of the detection gripping robot arm (43) extends into the incineration furnace (5). The pressing mechanism (42) is located on one side of the sample holding tank (41), and the output end of the pressing mechanism (42) is vertically located above the sample holding tank (41).

5. The ash content detection system according to claim 1, characterized in that: The temperature testing component (6) consists of a transmission arm and a temperature measuring unit. The transmission arm is used to adjust the measuring end face of the temperature measuring unit and the detection end processing mechanism (4) when they hold the combustion vessel.

6. The ash content detection system according to claim 5, characterized in that: The secondary non-inductive ash content detection component (8) includes a passive secondary detection module, a capture source processing module, and a data display module. The passive secondary detection module is used to acquire radioactive elements in coal and convert them into photons. The capture source processing module is used to convert the current pulse in the photons into a voltage signal, amplify the voltage signal, remove noise, and generate an effective signal. Finally, the generated effective signal is represented by the data display module.

7. The ash content detection system according to claim 6, characterized in that: The passive secondary detection module consists of a NaI crystal and a PMT analyzer. Radioactive elements in coal are converted into photons after entering the NaI crystal and are captured by the PMT analyzer.

8. The ash content detection system according to claim 7, characterized in that: The capture source processing module comprises a voltage-sensitive preamplifier, a discriminator, a microprocessor, and a D / A converter. The voltage-sensitive preamplifier converts the current pulses in the photons into voltage signals. After the discriminator eliminates noise in the voltage signals, the signals are input to the D / A converter, which then outputs the digital signals to the microprocessor. Finally, the microprocessor calculates the ash content of the coal based on the corresponding count values ​​of the digital signals.

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