On-line detection device for moisture of powdery fuel

Abstract

The utility model discloses an online detection device for moisture of powdered fuel, which belongs to the technical field of pulverized coal detection and comprises a mounting plate, a collecting box is arranged on one side of the mounting plate, a collecting opening is formed in the top side of the collecting box, a sampling and sample clearing mechanism is arranged on the collecting box, a detector is mounted on the other side of the collecting box, and the detector is arranged on the mounting plate. And the detector extends into the collecting box. According to the online detection device for the moisture of the powdery fuel, the detector is mounted on the mounting plate, so that the moisture content of pulverized coal can be detected in real time by utilizing the detector, the workload is smaller compared with a high-temperature drying detection method, the pulverized coal does not need to be frequently sampled and weighed, and meanwhile, the situation that personnel go upstairs and downstairs for sampling is also avoided; the detector is mounted on the mounting plate, so that compared with microwave signal detection, the device can be used for detecting pulverized coal with lower water content, and is higher in precision and better in detection effect.

Description

Technical Field

[0001] This utility model relates to the field of coal powder detection technology, specifically to an online detection device for the moisture content of powdered fuel. Background Technology

[0002] Cement plants with kiln lines all use coal, which needs to be processed into pulverized coal. The fineness and moisture content of the pulverized coal need to be controlled. Traditional methods for detecting the moisture content of pulverized coal involve sampling and high-temperature drying. The pulverized coal sampling device can only be installed on the feed pipes of the pulverized coal silo, which is located at a high position. This results in a large workload for personnel to go up and down stairs to collect samples. Therefore, it is imperative to study how to realize an online detection method for pulverized coal moisture. Research and invention have been carried out from several aspects, including the labor intensity of personnel and the accuracy of the detection device.

[0003] There are two existing methods for detecting the moisture content of pulverized coal. One method involves taking out pulverized coal with a sampler and using a high-temperature drying method to detect the moisture content. The disadvantage of this method is that it is labor-intensive and consumes a lot of manpower and resources. The other method is to directly detect the moisture content of the material using microwave signals. The moisture content of the material being tested is generally high and the accuracy is low. Since the moisture content in pulverized coal is low, the detection effect is also poor.

[0004] For example, Chinese patent (CN116794073A) discloses a microwave moisture detection system. A microwave detection mechanism is installed inside a chassis, including a hopper and a sample box located below the hopper. An ultra-wideband transmitting antenna and an ultra-wideband receiving antenna are installed on the first and second sidewalls of the sample box, respectively. A vector network analyzer inside the chassis is connected to the ultra-wideband transmitting and receiving antennas to acquire received data from the ultra-wideband receiving antenna and convert it into various types of moisture characteristic data. A signal processor is connected to the vector network analyzer to control the transmission of microwave signals and to acquire the acquisition signals from the ultra-wideband receiving antenna. The signal processor includes: a data acquisition layer connected to the vector network analyzer to acquire moisture characteristic data and construct a moisture characteristic data sample set; and a model calculation layer that generates and stores a moisture content prediction model, which calculates the moisture content based on the moisture characteristic data.

[0005] The above method uses microwave signals to detect moisture in the sample, but because the moisture content in coal powder is low, its detection accuracy is not high and the detection effect is poor. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the prior art by providing an online detection device for the moisture content of powdered fuel.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an online detection device for moisture content of powdered fuel, including a mounting plate, a collection box provided on one side of the mounting plate, a collection port provided on the top side of the collection box, a sampling and cleaning mechanism provided on the collection box, and a detector installed on the other side of the collection box, the detector extending into the interior of the collection box.

[0008] By adopting the above technical solution, the detector can detect the moisture content of the coal powder that falls into the collection box in real time, ensuring the real-time nature and accuracy of the detection. The sampling and cleaning mechanism can send the coal powder into the coal powder silo during normal operation and discharge the coal powder into the sample retention box when it is necessary to sample the coal powder.

[0009] Preferably, the mounting plate has a mounting tube installed on the side near the detector, the detector is mounted on the mounting tube via a flange plate, and the collection box has a detection hole for the detector to pass through.

[0010] By adopting the above technical solution, it is convenient to install the detector on the mounting pipe, thereby facilitating the installation and maintenance of the detector. The detection hole is used to facilitate the detector to extend into the collection box to detect coal dust.

[0011] Preferably, the sampling and cleaning mechanism includes a connecting pipe installed on the collection box, a motor installed at one end of the connecting pipe, a rotating shaft installed on the output shaft of the motor, an auger installed at the end of the rotating shaft away from the motor, a cleaning pipe installed on one side of the connecting pipe, the auger located inside the connecting pipe, and the connecting pipe passing through the collection box and the mounting plate and communicating with the collection box.

[0012] By adopting the above technical solution, it is convenient for the motor to drive the auger to rotate. When the auger rotates in the forward direction, it can drive the coal powder to move towards the side closer to the coal powder hopper, so that the coal powder can fall into the coal powder hopper. When the auger rotates in the reverse direction, it can drive the coal powder to move towards the sample cleaning tube, so that the coal powder can enter the sample retention box.

[0013] Preferably, one end of the connecting pipe is provided with a discharge port, and the end of the connecting pipe near the motor is rotatably connected to the rotating shaft.

[0014] By adopting the above technical solution, the coal dust in the collection box can be easily fed into the connecting pipe through the discharge port after being tested, thus facilitating the sampling and cleaning mechanism to classify and process the coal dust.

[0015] Preferably, one end of the bottom side of the connecting pipe is provided with a discharge port, both the left and right ends of the connecting pipe are closed, and the end of the connecting pipe near the motor is rotatably connected to the rotating shaft.

[0016] By adopting the above technical solution, the discharge port is used to guide the tested coal powder into the coal powder silo.

[0017] Preferably, a guide plate is fixed on one side of the collection box, and the guide plate is inclined.

[0018] By adopting the above technical solution, the guide plate is used to guide the coal powder into the collection box by the gravity of the coal powder itself, thereby increasing the coal powder feeding speed and increasing the range of coal powder receiving, thus preventing the coal powder from falling to other places.

[0019] Preferably, the upper half of the collection box has a trapezoidal cross-section, and the lower half of the collection box has a rectangular longitudinal cross-section.

[0020] By adopting the above technical solution, the upper part of the collection box can be tilted to increase the falling speed of the coal powder by utilizing its own gravity.

[0021] Preferably, the motor is mounted on the outer side of the end of the connecting pipe via multiple support frames.

[0022] By adopting the above technical solution, the stability of the connection between the connecting pipe and the motor is improved.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. By installing a detector on the mounting plate, the moisture content of coal powder can be detected in real time. Compared with the high temperature drying detection method, it requires less work, eliminates the need for frequent sampling and weighing of coal powder, and avoids the need for personnel to go up and down stairs to take samples.

[0025] 2. By installing a detector on the mounting plate, it can detect coal powder with low moisture content, compared to microwave signal detection, and its accuracy is higher and the detection effect is better.

[0026] 3. By installing a sampling and cleaning mechanism in the discharge pipe, the motor can drive the auger to rotate forward or backward. When the output shaft of the motor rotates forward, the output shaft of the motor can drive the auger to input coal powder into the coal powder silo. When it is necessary to sample the coal powder, the motor can drive the auger to rotate backward, so that the coal powder enters the sample retention box through the cleaning pipe. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a front view structural diagram of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of this utility model from a bottom view.

[0030] Figure 4 This is a top view of the structure of this utility model.

[0031] In the diagram: 1. Mounting plate; 2. Collection box; 300. Sampling and cleaning mechanism; 301. Connecting pipe; 302. Motor; 303. Rotating shaft; 304. Cleaning pipe; 4. Support frame; 5. Collection port; 6. Mounting pipe; 7. Flange plate; 8. Drop port; 9. Discharge port; 10. Guide plate. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Please refer to Figures 1 to 4 The powdered fuel moisture online detection device in this embodiment includes a mounting plate 1, a collection box 2 on one side of the mounting plate 1, a collection port 5 on the top side of the collection box 2, a sampling and cleaning mechanism 300 on the collection box 2, a detector on the other side of the collection box 2, the detector extending into the interior of the collection box 2, a guide plate 10 fixed on one side of the collection box 2, the guide plate 10 being inclined, the cross-section of the upper half of the collection box 2 being trapezoidal, and the longitudinal section of the lower half of the collection box 2 being rectangular.

[0034] In this embodiment, the mounting plate 1 is used to facilitate the installation of the device on the feed pipe, thereby fixing the device. The guide plate 10 is used to guide the coal powder in the feed pipe into the collection box 2. The collection box 2 is used to receive and accumulate the coal powder, thereby facilitating the detector to detect the moisture content of the coal powder. The discharge port 8 is used to allow the coal powder in the collection box 2 to fall into the sampling and cleaning mechanism 300. The sampling and cleaning mechanism 300 is used to send the coal powder into the coal powder silo or the sample retention box.

[0035] It should be noted that the feed pipes are used to introduce coal powder into the collection box 2. The sampling and cleaning mechanism 300 is equipped with a coal powder silo and a sample retention box below it. The detector model is H-FMS100 on-site online material moisture content analysis system.

[0036] Please refer to Figures 1 to 4In this embodiment, the sampling and cleaning mechanism 300 includes a connecting pipe 301 installed on the collection box 2. A motor 302 is installed at one end of the connecting pipe 301. A rotating shaft 303 is installed on the output shaft of the motor 302. An auger is installed at the end of the rotating shaft 303 away from the motor 302. A cleaning pipe 304 is installed on one side of the connecting pipe 301. The auger is located inside the connecting pipe 301. The connecting pipe 301 passes through the collection box 2 and the mounting plate 1 and is connected to the collection box 2. A discharge port 8 communicating with the collection box 2 is opened on the outer periphery of the connecting pipe 301. A discharge port 9 is opened at one end of the connecting pipe 301. The end of the connecting pipe 301 near the motor 302 is rotatably connected to the rotating shaft 303. The motor 302 is installed on the outer side of the end of the connecting pipe 301 through a support frame 4.

[0037] In this embodiment, the discharge port 8 is used to allow the coal powder after testing to enter the connecting pipe 301. The motor 302 is used to drive the rotating shaft 303 to rotate forward and reverse. When the rotating shaft 303 rotates, it can drive the auger to rotate synchronously. When the auger rotates forward, it can drive the coal powder to move towards the side closer to the coal powder bin, so that the coal powder can fall into the coal powder bin. When the auger rotates in reverse, it can drive the coal powder to move towards the cleaning pipe 304, so that the coal powder can enter the sample retention box.

[0038] It should be noted that the pulverized coal bin is located below the discharge port 9, the sample retention box is located below the cleaning tube 304, and the support frame 4 includes two flanges located at both ends and a connecting column fixed between the two flanges.

[0039] Please refer to Figures 1 to 2 In this embodiment, the mounting plate 1 is equipped with a mounting tube 6 on the side close to the detector. The detector is mounted on the mounting tube 6 through a flange plate 7. The collection box 2 has a detection hole for the detector to pass through.

[0040] In this embodiment, the mounting tube 6 is used to facilitate the installation and fixation of the detector extension. At the same time, the mounting tube 6 can protect and support the detector. After the detector passes through the detection hole, it can come into contact with the coal powder, thereby realizing accurate detection of the coal powder.

[0041] It should be noted that when the detector detects coal dust, the detector needs to be filled with coal dust to ensure the stability of the environment within the detector's detectable area. At this time, the signal fluctuation of the detector is the fluctuation of the coal dust moisture.

[0042] Working principle: When coal powder falls onto the guide plate 10, the guide plate 10 guides the coal powder to fall into the collection box 2. When the collection box 2 is full, the detector detects the moisture content of the coal powder and starts the motor 302. The output shaft of the motor 302 drives the rotating shaft 303 and the auger to rotate. When the coal powder falls out of the discharge port of the collection box 2 and enters the connecting pipe 301 through the discharge port 8, the auger drives the coal powder to move towards the side closer to the discharge port 9. When the coal powder reaches... When the coal powder is above the discharge port 9, it falls from the discharge port 9 into the coal powder silo under the action of gravity. When it is necessary to sample the coal powder, the motor 302 is started in reverse. The output shaft of the motor 302 starts to rotate in reverse. The output shaft of the motor 302 drives the rotating shaft 303 and the auger to rotate in reverse. The auger moves the coal powder towards the side closer to the cleaning tube 304. When the coal powder moves above the cleaning tube 304, it is discharged from the cleaning tube 304 and falls into the sample retention box, thus realizing the collection of coal powder samples.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online moisture detection device for powdered fuel, comprising a mounting plate (1), a collection box (2) provided on one side of the mounting plate (1), and a collection port (5) provided on the top side of the collection box (2), characterized in that, The collection box (2) is provided with a sampling and cleaning mechanism (300), and a detector is installed on the other side of the collection box (2), which extends into the interior of the collection box (2).

2. The online moisture detection device for powdered fuel according to claim 1, characterized in that, The mounting plate (1) has a mounting tube (6) installed on the side near the detector. The detector is mounted on the mounting tube (6) through a flange plate (7). The collection box (2) has a detection hole for the detector to pass through.

3. The online moisture detection device for powdered fuel according to claim 1, characterized in that, The sampling and cleaning mechanism (300) includes a connecting pipe (301) installed on the collection box (2). A motor (302) is installed at one end of the connecting pipe (301). A rotating shaft (303) is installed on the output shaft of the motor (302). An auger is installed at the end of the rotating shaft (303) away from the motor (302). A cleaning pipe (304) is installed on one side of the connecting pipe (301). The auger is located inside the connecting pipe (301). The connecting pipe (301) passes through the collection box (2) and the mounting plate (1) and is connected to the collection box (2).

4. The online moisture detection device for powdered fuel according to claim 3, characterized in that, The outer periphery of the connecting pipe (301) is provided with a discharge port (8) that communicates with the collection box (2).

5. The online moisture detection device for powdered fuel according to claim 3, characterized in that, One end of the connecting pipe (301) is provided with a discharge port (9), and the end of the connecting pipe (301) near the motor (302) is rotatably connected to the rotating shaft (303).

6. The online moisture detection device for powdered fuel according to claim 1, characterized in that, A guide plate (10) is fixed on one side of the collection box (2), and the guide plate (10) is inclined.

7. The online moisture detection device for powdered fuel according to claim 1, characterized in that, The upper half of the collection box (2) has a trapezoidal cross section, and the lower half of the collection box (2) has a rectangular longitudinal section.

8. The online moisture detection device for powdered fuel according to claim 3, characterized in that, The motor (302) is mounted on the outer side of the end of the connecting pipe (301) via multiple support frames (4).

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